diff options
Diffstat (limited to 'drivers/net/can')
23 files changed, 6481 insertions, 2284 deletions
diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig index 2cb75988b328..7cdd0cead693 100644 --- a/drivers/net/can/Kconfig +++ b/drivers/net/can/Kconfig @@ -73,6 +73,12 @@ config CAN_CALC_BITTIMING config CAN_LEDS bool "Enable LED triggers for Netlink based drivers" depends on LEDS_CLASS + # The netdev trigger (LEDS_TRIGGER_NETDEV) should be able to do + # everything that this driver is doing. This is marked as broken + # because it uses stuff that is intended to be changed or removed. + # Please consider switching to the netdev trigger and confirm it + # fulfills your needs instead of fixing this driver. + depends on BROKEN select LEDS_TRIGGERS ---help--- This option adds two LED triggers for packet receive and transmit diff --git a/drivers/net/can/cc770/cc770.c b/drivers/net/can/cc770/cc770.c index d4dd4da23997..da636a22c542 100644 --- a/drivers/net/can/cc770/cc770.c +++ b/drivers/net/can/cc770/cc770.c @@ -73,7 +73,7 @@ MODULE_PARM_DESC(msgobj15_eff, "Extended 29-bit frames for message object 15 " static int i82527_compat; module_param(i82527_compat, int, 0444); -MODULE_PARM_DESC(i82527_compat, "Strict Intel 82527 comptibility mode " +MODULE_PARM_DESC(i82527_compat, "Strict Intel 82527 compatibility mode " "without using additional functions"); /* diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 3c71f1cb205f..49163570a63a 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -649,8 +649,7 @@ struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf) can_skb_prv(skb)->ifindex = dev->ifindex; can_skb_prv(skb)->skbcnt = 0; - *cf = skb_put(skb, sizeof(struct can_frame)); - memset(*cf, 0, sizeof(struct can_frame)); + *cf = skb_put_zero(skb, sizeof(struct can_frame)); return skb; } @@ -678,8 +677,7 @@ struct sk_buff *alloc_canfd_skb(struct net_device *dev, can_skb_prv(skb)->ifindex = dev->ifindex; can_skb_prv(skb)->skbcnt = 0; - *cfd = skb_put(skb, sizeof(struct canfd_frame)); - memset(*cfd, 0, sizeof(struct canfd_frame)); + *cfd = skb_put_zero(skb, sizeof(struct canfd_frame)); return skb; } @@ -703,7 +701,8 @@ EXPORT_SYMBOL_GPL(alloc_can_err_skb); /* * Allocate and setup space for the CAN network device */ -struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max) +struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max, + unsigned int txqs, unsigned int rxqs) { struct net_device *dev; struct can_priv *priv; @@ -715,7 +714,8 @@ struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max) else size = sizeof_priv; - dev = alloc_netdev(size, "can%d", NET_NAME_UNKNOWN, can_setup); + dev = alloc_netdev_mqs(size, "can%d", NET_NAME_UNKNOWN, can_setup, + txqs, rxqs); if (!dev) return NULL; @@ -734,7 +734,7 @@ struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max) return dev; } -EXPORT_SYMBOL_GPL(alloc_candev); +EXPORT_SYMBOL_GPL(alloc_candev_mqs); /* * Free space of the CAN network device diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index d53a45bf2a72..8e972ef08637 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -1,24 +1,13 @@ -/* - * flexcan.c - FLEXCAN CAN controller driver - * - * Copyright (c) 2005-2006 Varma Electronics Oy - * Copyright (c) 2009 Sascha Hauer, Pengutronix - * Copyright (c) 2010-2017 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de> - * Copyright (c) 2014 David Jander, Protonic Holland - * - * Based on code originally by Andrey Volkov <avolkov@varma-el.com> - * - * LICENCE: - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation version 2. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ +// SPDX-License-Identifier: GPL-2.0 +// +// flexcan.c - FLEXCAN CAN controller driver +// +// Copyright (c) 2005-2006 Varma Electronics Oy +// Copyright (c) 2009 Sascha Hauer, Pengutronix +// Copyright (c) 2010-2017 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de> +// Copyright (c) 2014 David Jander, Protonic Holland +// +// Based on code originally by Andrey Volkov <avolkov@varma-el.com> #include <linux/netdevice.h> #include <linux/can.h> @@ -523,7 +512,7 @@ static int flexcan_get_berr_counter(const struct net_device *dev, return err; } -static int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev) +static netdev_tx_t flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev) { const struct flexcan_priv *priv = netdev_priv(dev); struct can_frame *cf = (struct can_frame *)skb->data; diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c index adfdb66a486e..02042cb09bd2 100644 --- a/drivers/net/can/janz-ican3.c +++ b/drivers/net/can/janz-ican3.c @@ -1684,7 +1684,7 @@ static int ican3_stop(struct net_device *ndev) return 0; } -static int ican3_xmit(struct sk_buff *skb, struct net_device *ndev) +static netdev_tx_t ican3_xmit(struct sk_buff *skb, struct net_device *ndev) { struct ican3_dev *mod = netdev_priv(ndev); struct can_frame *cf = (struct can_frame *)skb->data; diff --git a/drivers/net/can/peak_canfd/peak_canfd.c b/drivers/net/can/peak_canfd/peak_canfd.c index ed8561d4a90f..5696d7e80751 100644 --- a/drivers/net/can/peak_canfd/peak_canfd.c +++ b/drivers/net/can/peak_canfd/peak_canfd.c @@ -486,7 +486,7 @@ int peak_canfd_handle_msgs_list(struct peak_canfd_priv *priv, if (msg_size <= 0) break; - msg_ptr += msg_size; + msg_ptr += ALIGN(msg_size, 4); } if (msg_size < 0) diff --git a/drivers/net/can/peak_canfd/peak_pciefd_main.c b/drivers/net/can/peak_canfd/peak_pciefd_main.c index 455a3797a200..c458d5fdc8d3 100644 --- a/drivers/net/can/peak_canfd/peak_pciefd_main.c +++ b/drivers/net/can/peak_canfd/peak_pciefd_main.c @@ -174,9 +174,6 @@ struct pciefd_page { u32 size; }; -#define CANFD_IRQ_SET 0x00000001 -#define CANFD_TX_PATH_SET 0x00000002 - /* CAN-FD channel object */ struct pciefd_board; struct pciefd_can { @@ -418,7 +415,7 @@ static int pciefd_pre_cmd(struct peak_canfd_priv *ucan) break; /* going into operational mode: setup IRQ handler */ - err = request_irq(priv->board->pci_dev->irq, + err = request_irq(priv->ucan.ndev->irq, pciefd_irq_handler, IRQF_SHARED, PCIEFD_DRV_NAME, @@ -491,15 +488,18 @@ static int pciefd_post_cmd(struct peak_canfd_priv *ucan) /* controller now in reset mode: */ + /* disable IRQ for this CAN */ + pciefd_can_writereg(priv, CANFD_CTL_IEN_BIT, + PCIEFD_REG_CAN_RX_CTL_CLR); + /* stop and reset DMA addresses in Tx/Rx engines */ pciefd_can_clear_tx_dma(priv); pciefd_can_clear_rx_dma(priv); - /* disable IRQ for this CAN */ - pciefd_can_writereg(priv, CANFD_CTL_IEN_BIT, - PCIEFD_REG_CAN_RX_CTL_CLR); + /* wait for above commands to complete (read cycle) */ + (void)pciefd_sys_readreg(priv->board, PCIEFD_REG_SYS_VER1); - free_irq(priv->board->pci_dev->irq, priv); + free_irq(priv->ucan.ndev->irq, priv); ucan->can.state = CAN_STATE_STOPPED; @@ -638,7 +638,7 @@ static int pciefd_can_probe(struct pciefd_board *pciefd) GFP_KERNEL); if (!priv->tx_dma_vaddr) { dev_err(&pciefd->pci_dev->dev, - "Tx dmaim_alloc_coherent(%u) failure\n", + "Tx dmam_alloc_coherent(%u) failure\n", PCIEFD_TX_DMA_SIZE); goto err_free_candev; } @@ -691,7 +691,7 @@ static int pciefd_can_probe(struct pciefd_board *pciefd) pciefd->can[pciefd->can_count] = priv; dev_info(&pciefd->pci_dev->dev, "%s at reg_base=0x%p irq=%d\n", - ndev->name, priv->reg_base, pciefd->pci_dev->irq); + ndev->name, priv->reg_base, ndev->irq); return 0; diff --git a/drivers/net/can/sja1000/peak_pci.c b/drivers/net/can/sja1000/peak_pci.c index 5adc95c922ee..a97b81d1d0da 100644 --- a/drivers/net/can/sja1000/peak_pci.c +++ b/drivers/net/can/sja1000/peak_pci.c @@ -608,7 +608,7 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) writeb(0x00, cfg_base + PITA_GPIOICR); /* Toggle reset */ writeb(0x05, cfg_base + PITA_MISC + 3); - mdelay(5); + usleep_range(5000, 6000); /* Leave parport mux mode */ writeb(0x04, cfg_base + PITA_MISC + 3); diff --git a/drivers/net/can/sja1000/peak_pcmcia.c b/drivers/net/can/sja1000/peak_pcmcia.c index 485b19c9ae47..b8c39ede7cd5 100644 --- a/drivers/net/can/sja1000/peak_pcmcia.c +++ b/drivers/net/can/sja1000/peak_pcmcia.c @@ -530,7 +530,7 @@ static int pcan_add_channels(struct pcan_pccard *card) pcan_write_reg(card, PCC_CCR, ccr); /* wait 2ms before unresetting channels */ - mdelay(2); + usleep_range(2000, 3000); ccr &= ~PCC_CCR_RST_ALL; pcan_write_reg(card, PCC_CCR, ccr); diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c index 1ac2090a1721..093fc9a529f0 100644 --- a/drivers/net/can/sun4i_can.c +++ b/drivers/net/can/sun4i_can.c @@ -409,7 +409,7 @@ static int sun4ican_set_mode(struct net_device *dev, enum can_mode mode) * xx xx xx xx ff ll 00 11 22 33 44 55 66 77 * [ can_id ] [flags] [len] [can data (up to 8 bytes] */ -static int sun4ican_start_xmit(struct sk_buff *skb, struct net_device *dev) +static netdev_tx_t sun4ican_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct sun4ican_priv *priv = netdev_priv(dev); struct can_frame *cf = (struct can_frame *)skb->data; diff --git a/drivers/net/can/usb/Kconfig b/drivers/net/can/usb/Kconfig index c36f4bdcbf4f..750d04d9e2ae 100644 --- a/drivers/net/can/usb/Kconfig +++ b/drivers/net/can/usb/Kconfig @@ -1,6 +1,12 @@ menu "CAN USB interfaces" depends on USB +config CAN_8DEV_USB + tristate "8 devices USB2CAN interface" + ---help--- + This driver supports the USB2CAN interface + from 8 devices (http://www.8devices.com). + config CAN_EMS_USB tristate "EMS CPC-USB/ARM7 CAN/USB interface" ---help--- @@ -26,7 +32,7 @@ config CAN_KVASER_USB tristate "Kvaser CAN/USB interface" ---help--- This driver adds support for Kvaser CAN/USB devices like Kvaser - Leaf Light and Kvaser USBcan II. + Leaf Light, Kvaser USBcan II and Kvaser Memorator Pro 5xHS. The driver provides support for the following devices: - Kvaser Leaf Light @@ -55,12 +61,30 @@ config CAN_KVASER_USB - Kvaser Memorator HS/HS - Kvaser Memorator HS/LS - Scania VCI2 (if you have the Kvaser logo on top) + - Kvaser BlackBird v2 + - Kvaser Leaf Pro HS v2 + - Kvaser Hybrid 2xCAN/LIN + - Kvaser Hybrid Pro 2xCAN/LIN + - Kvaser Memorator 2xHS v2 + - Kvaser Memorator Pro 2xHS v2 + - Kvaser Memorator Pro 5xHS + - Kvaser USBcan Light 4xHS + - Kvaser USBcan Pro 2xHS v2 + - Kvaser USBcan Pro 5xHS + - ATI Memorator Pro 2xHS v2 + - ATI USBcan Pro 2xHS v2 If unsure, say N. To compile this driver as a module, choose M here: the module will be called kvaser_usb. +config CAN_MCBA_USB + tristate "Microchip CAN BUS Analyzer interface" + ---help--- + This driver supports the CAN BUS Analyzer interface + from Microchip (http://www.microchip.com/development-tools/). + config CAN_PEAK_USB tristate "PEAK PCAN-USB/USB Pro interfaces for CAN 2.0b/CAN-FD" ---help--- @@ -77,16 +101,26 @@ config CAN_PEAK_USB (see also http://www.peak-system.com). -config CAN_8DEV_USB - tristate "8 devices USB2CAN interface" - ---help--- - This driver supports the USB2CAN interface - from 8 devices (http://www.8devices.com). - config CAN_MCBA_USB tristate "Microchip CAN BUS Analyzer interface" ---help--- This driver supports the CAN BUS Analyzer interface from Microchip (http://www.microchip.com/development-tools/). +config CAN_UCAN + tristate "Theobroma Systems UCAN interface" + ---help--- + This driver supports the Theobroma Systems + UCAN USB-CAN interface. + + The UCAN driver supports the microcontroller-based USB/CAN + adapters from Theobroma Systems. There are two form-factors + that run essentially the same firmware: + + * Seal: standalone USB stick + https://www.theobroma-systems.com/seal) + * Mule: integrated on the PCB of various System-on-Modules + from Theobroma Systems like the A31-µQ7 and the RK3399-Q7 + (https://www.theobroma-systems.com/rk3399-q7) + endmenu diff --git a/drivers/net/can/usb/Makefile b/drivers/net/can/usb/Makefile index 49ac7b99ba32..aa0f17c0b2ed 100644 --- a/drivers/net/can/usb/Makefile +++ b/drivers/net/can/usb/Makefile @@ -3,10 +3,11 @@ # Makefile for the Linux Controller Area Network USB drivers. # +obj-$(CONFIG_CAN_8DEV_USB) += usb_8dev.o obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o obj-$(CONFIG_CAN_ESD_USB2) += esd_usb2.o obj-$(CONFIG_CAN_GS_USB) += gs_usb.o -obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb.o -obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/ -obj-$(CONFIG_CAN_8DEV_USB) += usb_8dev.o +obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb/ obj-$(CONFIG_CAN_MCBA_USB) += mcba_usb.o +obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/ +obj-$(CONFIG_CAN_UCAN) += ucan.o diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c deleted file mode 100644 index daed57d3d209..000000000000 --- a/drivers/net/can/usb/kvaser_usb.c +++ /dev/null @@ -1,2085 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation version 2. - * - * Parts of this driver are based on the following: - * - Kvaser linux leaf driver (version 4.78) - * - CAN driver for esd CAN-USB/2 - * - Kvaser linux usbcanII driver (version 5.3) - * - * Copyright (C) 2002-2006 KVASER AB, Sweden. All rights reserved. - * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh - * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> - * Copyright (C) 2015 Valeo S.A. - */ - -#include <linux/spinlock.h> -#include <linux/kernel.h> -#include <linux/completion.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/usb.h> - -#include <linux/can.h> -#include <linux/can/dev.h> -#include <linux/can/error.h> - -#define MAX_RX_URBS 4 -#define START_TIMEOUT 1000 /* msecs */ -#define STOP_TIMEOUT 1000 /* msecs */ -#define USB_SEND_TIMEOUT 1000 /* msecs */ -#define USB_RECV_TIMEOUT 1000 /* msecs */ -#define RX_BUFFER_SIZE 3072 -#define CAN_USB_CLOCK 8000000 -#define MAX_NET_DEVICES 3 -#define MAX_USBCAN_NET_DEVICES 2 - -/* Kvaser Leaf USB devices */ -#define KVASER_VENDOR_ID 0x0bfd -#define USB_LEAF_DEVEL_PRODUCT_ID 10 -#define USB_LEAF_LITE_PRODUCT_ID 11 -#define USB_LEAF_PRO_PRODUCT_ID 12 -#define USB_LEAF_SPRO_PRODUCT_ID 14 -#define USB_LEAF_PRO_LS_PRODUCT_ID 15 -#define USB_LEAF_PRO_SWC_PRODUCT_ID 16 -#define USB_LEAF_PRO_LIN_PRODUCT_ID 17 -#define USB_LEAF_SPRO_LS_PRODUCT_ID 18 -#define USB_LEAF_SPRO_SWC_PRODUCT_ID 19 -#define USB_MEMO2_DEVEL_PRODUCT_ID 22 -#define USB_MEMO2_HSHS_PRODUCT_ID 23 -#define USB_UPRO_HSHS_PRODUCT_ID 24 -#define USB_LEAF_LITE_GI_PRODUCT_ID 25 -#define USB_LEAF_PRO_OBDII_PRODUCT_ID 26 -#define USB_MEMO2_HSLS_PRODUCT_ID 27 -#define USB_LEAF_LITE_CH_PRODUCT_ID 28 -#define USB_BLACKBIRD_SPRO_PRODUCT_ID 29 -#define USB_OEM_MERCURY_PRODUCT_ID 34 -#define USB_OEM_LEAF_PRODUCT_ID 35 -#define USB_CAN_R_PRODUCT_ID 39 -#define USB_LEAF_LITE_V2_PRODUCT_ID 288 -#define USB_MINI_PCIE_HS_PRODUCT_ID 289 -#define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290 -#define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291 -#define USB_MINI_PCIE_2HS_PRODUCT_ID 292 - -static inline bool kvaser_is_leaf(const struct usb_device_id *id) -{ - return id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID && - id->idProduct <= USB_MINI_PCIE_2HS_PRODUCT_ID; -} - -/* Kvaser USBCan-II devices */ -#define USB_USBCAN_REVB_PRODUCT_ID 2 -#define USB_VCI2_PRODUCT_ID 3 -#define USB_USBCAN2_PRODUCT_ID 4 -#define USB_MEMORATOR_PRODUCT_ID 5 - -static inline bool kvaser_is_usbcan(const struct usb_device_id *id) -{ - return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID && - id->idProduct <= USB_MEMORATOR_PRODUCT_ID; -} - -/* USB devices features */ -#define KVASER_HAS_SILENT_MODE BIT(0) -#define KVASER_HAS_TXRX_ERRORS BIT(1) - -/* Message header size */ -#define MSG_HEADER_LEN 2 - -/* Can message flags */ -#define MSG_FLAG_ERROR_FRAME BIT(0) -#define MSG_FLAG_OVERRUN BIT(1) -#define MSG_FLAG_NERR BIT(2) -#define MSG_FLAG_WAKEUP BIT(3) -#define MSG_FLAG_REMOTE_FRAME BIT(4) -#define MSG_FLAG_RESERVED BIT(5) -#define MSG_FLAG_TX_ACK BIT(6) -#define MSG_FLAG_TX_REQUEST BIT(7) - -/* Can states (M16C CxSTRH register) */ -#define M16C_STATE_BUS_RESET BIT(0) -#define M16C_STATE_BUS_ERROR BIT(4) -#define M16C_STATE_BUS_PASSIVE BIT(5) -#define M16C_STATE_BUS_OFF BIT(6) - -/* Can msg ids */ -#define CMD_RX_STD_MESSAGE 12 -#define CMD_TX_STD_MESSAGE 13 -#define CMD_RX_EXT_MESSAGE 14 -#define CMD_TX_EXT_MESSAGE 15 -#define CMD_SET_BUS_PARAMS 16 -#define CMD_GET_BUS_PARAMS 17 -#define CMD_GET_BUS_PARAMS_REPLY 18 -#define CMD_GET_CHIP_STATE 19 -#define CMD_CHIP_STATE_EVENT 20 -#define CMD_SET_CTRL_MODE 21 -#define CMD_GET_CTRL_MODE 22 -#define CMD_GET_CTRL_MODE_REPLY 23 -#define CMD_RESET_CHIP 24 -#define CMD_RESET_CARD 25 -#define CMD_START_CHIP 26 -#define CMD_START_CHIP_REPLY 27 -#define CMD_STOP_CHIP 28 -#define CMD_STOP_CHIP_REPLY 29 - -#define CMD_LEAF_GET_CARD_INFO2 32 -#define CMD_USBCAN_RESET_CLOCK 32 -#define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33 - -#define CMD_GET_CARD_INFO 34 -#define CMD_GET_CARD_INFO_REPLY 35 -#define CMD_GET_SOFTWARE_INFO 38 -#define CMD_GET_SOFTWARE_INFO_REPLY 39 -#define CMD_ERROR_EVENT 45 -#define CMD_FLUSH_QUEUE 48 -#define CMD_RESET_ERROR_COUNTER 49 -#define CMD_TX_ACKNOWLEDGE 50 -#define CMD_CAN_ERROR_EVENT 51 -#define CMD_FLUSH_QUEUE_REPLY 68 - -#define CMD_LEAF_USB_THROTTLE 77 -#define CMD_LEAF_LOG_MESSAGE 106 - -/* error factors */ -#define M16C_EF_ACKE BIT(0) -#define M16C_EF_CRCE BIT(1) -#define M16C_EF_FORME BIT(2) -#define M16C_EF_STFE BIT(3) -#define M16C_EF_BITE0 BIT(4) -#define M16C_EF_BITE1 BIT(5) -#define M16C_EF_RCVE BIT(6) -#define M16C_EF_TRE BIT(7) - -/* Only Leaf-based devices can report M16C error factors, - * thus define our own error status flags for USBCANII - */ -#define USBCAN_ERROR_STATE_NONE 0 -#define USBCAN_ERROR_STATE_TX_ERROR BIT(0) -#define USBCAN_ERROR_STATE_RX_ERROR BIT(1) -#define USBCAN_ERROR_STATE_BUSERROR BIT(2) - -/* bittiming parameters */ -#define KVASER_USB_TSEG1_MIN 1 -#define KVASER_USB_TSEG1_MAX 16 -#define KVASER_USB_TSEG2_MIN 1 -#define KVASER_USB_TSEG2_MAX 8 -#define KVASER_USB_SJW_MAX 4 -#define KVASER_USB_BRP_MIN 1 -#define KVASER_USB_BRP_MAX 64 -#define KVASER_USB_BRP_INC 1 - -/* ctrl modes */ -#define KVASER_CTRL_MODE_NORMAL 1 -#define KVASER_CTRL_MODE_SILENT 2 -#define KVASER_CTRL_MODE_SELFRECEPTION 3 -#define KVASER_CTRL_MODE_OFF 4 - -/* Extended CAN identifier flag */ -#define KVASER_EXTENDED_FRAME BIT(31) - -/* Kvaser USB CAN dongles are divided into two major families: - * - Leaf: Based on Renesas M32C, running firmware labeled as 'filo' - * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios' - */ -enum kvaser_usb_family { - KVASER_LEAF, - KVASER_USBCAN, -}; - -struct kvaser_msg_simple { - u8 tid; - u8 channel; -} __packed; - -struct kvaser_msg_cardinfo { - u8 tid; - u8 nchannels; - union { - struct { - __le32 serial_number; - __le32 padding; - } __packed leaf0; - struct { - __le32 serial_number_low; - __le32 serial_number_high; - } __packed usbcan0; - } __packed; - __le32 clock_resolution; - __le32 mfgdate; - u8 ean[8]; - u8 hw_revision; - union { - struct { - u8 usb_hs_mode; - } __packed leaf1; - struct { - u8 padding; - } __packed usbcan1; - } __packed; - __le16 padding; -} __packed; - -struct kvaser_msg_cardinfo2 { - u8 tid; - u8 reserved; - u8 pcb_id[24]; - __le32 oem_unlock_code; -} __packed; - -struct leaf_msg_softinfo { - u8 tid; - u8 padding0; - __le32 sw_options; - __le32 fw_version; - __le16 max_outstanding_tx; - __le16 padding1[9]; -} __packed; - -struct usbcan_msg_softinfo { - u8 tid; - u8 fw_name[5]; - __le16 max_outstanding_tx; - u8 padding[6]; - __le32 fw_version; - __le16 checksum; - __le16 sw_options; -} __packed; - -struct kvaser_msg_busparams { - u8 tid; - u8 channel; - __le32 bitrate; - u8 tseg1; - u8 tseg2; - u8 sjw; - u8 no_samp; -} __packed; - -struct kvaser_msg_tx_can { - u8 channel; - u8 tid; - u8 msg[14]; - union { - struct { - u8 padding; - u8 flags; - } __packed leaf; - struct { - u8 flags; - u8 padding; - } __packed usbcan; - } __packed; -} __packed; - -struct kvaser_msg_rx_can_header { - u8 channel; - u8 flag; -} __packed; - -struct leaf_msg_rx_can { - u8 channel; - u8 flag; - - __le16 time[3]; - u8 msg[14]; -} __packed; - -struct usbcan_msg_rx_can { - u8 channel; - u8 flag; - - u8 msg[14]; - __le16 time; -} __packed; - -struct leaf_msg_chip_state_event { - u8 tid; - u8 channel; - - __le16 time[3]; - u8 tx_errors_count; - u8 rx_errors_count; - - u8 status; - u8 padding[3]; -} __packed; - -struct usbcan_msg_chip_state_event { - u8 tid; - u8 channel; - - u8 tx_errors_count; - u8 rx_errors_count; - __le16 time; - - u8 status; - u8 padding[3]; -} __packed; - -struct kvaser_msg_tx_acknowledge_header { - u8 channel; - u8 tid; -} __packed; - -struct leaf_msg_tx_acknowledge { - u8 channel; - u8 tid; - - __le16 time[3]; - u8 flags; - u8 time_offset; -} __packed; - -struct usbcan_msg_tx_acknowledge { - u8 channel; - u8 tid; - - __le16 time; - __le16 padding; -} __packed; - -struct leaf_msg_error_event { - u8 tid; - u8 flags; - __le16 time[3]; - u8 channel; - u8 padding; - u8 tx_errors_count; - u8 rx_errors_count; - u8 status; - u8 error_factor; -} __packed; - -struct usbcan_msg_error_event { - u8 tid; - u8 padding; - u8 tx_errors_count_ch0; - u8 rx_errors_count_ch0; - u8 tx_errors_count_ch1; - u8 rx_errors_count_ch1; - u8 status_ch0; - u8 status_ch1; - __le16 time; -} __packed; - -struct kvaser_msg_ctrl_mode { - u8 tid; - u8 channel; - u8 ctrl_mode; - u8 padding[3]; -} __packed; - -struct kvaser_msg_flush_queue { - u8 tid; - u8 channel; - u8 flags; - u8 padding[3]; -} __packed; - -struct leaf_msg_log_message { - u8 channel; - u8 flags; - __le16 time[3]; - u8 dlc; - u8 time_offset; - __le32 id; - u8 data[8]; -} __packed; - -struct kvaser_msg { - u8 len; - u8 id; - union { - struct kvaser_msg_simple simple; - struct kvaser_msg_cardinfo cardinfo; - struct kvaser_msg_cardinfo2 cardinfo2; - struct kvaser_msg_busparams busparams; - - struct kvaser_msg_rx_can_header rx_can_header; - struct kvaser_msg_tx_acknowledge_header tx_acknowledge_header; - - union { - struct leaf_msg_softinfo softinfo; - struct leaf_msg_rx_can rx_can; - struct leaf_msg_chip_state_event chip_state_event; - struct leaf_msg_tx_acknowledge tx_acknowledge; - struct leaf_msg_error_event error_event; - struct leaf_msg_log_message log_message; - } __packed leaf; - - union { - struct usbcan_msg_softinfo softinfo; - struct usbcan_msg_rx_can rx_can; - struct usbcan_msg_chip_state_event chip_state_event; - struct usbcan_msg_tx_acknowledge tx_acknowledge; - struct usbcan_msg_error_event error_event; - } __packed usbcan; - - struct kvaser_msg_tx_can tx_can; - struct kvaser_msg_ctrl_mode ctrl_mode; - struct kvaser_msg_flush_queue flush_queue; - } u; -} __packed; - -/* Summary of a kvaser error event, for a unified Leaf/Usbcan error - * handling. Some discrepancies between the two families exist: - * - * - USBCAN firmware does not report M16C "error factors" - * - USBCAN controllers has difficulties reporting if the raised error - * event is for ch0 or ch1. They leave such arbitration to the OS - * driver by letting it compare error counters with previous values - * and decide the error event's channel. Thus for USBCAN, the channel - * field is only advisory. - */ -struct kvaser_usb_error_summary { - u8 channel, status, txerr, rxerr; - union { - struct { - u8 error_factor; - } leaf; - struct { - u8 other_ch_status; - u8 error_state; - } usbcan; - }; -}; - -/* Context for an outstanding, not yet ACKed, transmission */ -struct kvaser_usb_tx_urb_context { - struct kvaser_usb_net_priv *priv; - u32 echo_index; - int dlc; -}; - -struct kvaser_usb { - struct usb_device *udev; - struct kvaser_usb_net_priv *nets[MAX_NET_DEVICES]; - - struct usb_endpoint_descriptor *bulk_in, *bulk_out; - struct usb_anchor rx_submitted; - - /* @max_tx_urbs: Firmware-reported maximum number of outstanding, - * not yet ACKed, transmissions on this device. This value is - * also used as a sentinel for marking free tx contexts. - */ - u32 fw_version; - unsigned int nchannels; - unsigned int max_tx_urbs; - enum kvaser_usb_family family; - - bool rxinitdone; - void *rxbuf[MAX_RX_URBS]; - dma_addr_t rxbuf_dma[MAX_RX_URBS]; -}; - -struct kvaser_usb_net_priv { - struct can_priv can; - struct can_berr_counter bec; - - struct kvaser_usb *dev; - struct net_device *netdev; - int channel; - - struct completion start_comp, stop_comp; - struct usb_anchor tx_submitted; - - spinlock_t tx_contexts_lock; - int active_tx_contexts; - struct kvaser_usb_tx_urb_context tx_contexts[]; -}; - -static const struct usb_device_id kvaser_usb_table[] = { - /* Leaf family IDs */ - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS | - KVASER_HAS_SILENT_MODE }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) }, - - /* USBCANII family IDs */ - { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), - .driver_info = KVASER_HAS_TXRX_ERRORS }, - - { } -}; -MODULE_DEVICE_TABLE(usb, kvaser_usb_table); - -static inline int kvaser_usb_send_msg(const struct kvaser_usb *dev, - struct kvaser_msg *msg) -{ - int actual_len; - - return usb_bulk_msg(dev->udev, - usb_sndbulkpipe(dev->udev, - dev->bulk_out->bEndpointAddress), - msg, msg->len, &actual_len, - USB_SEND_TIMEOUT); -} - -static int kvaser_usb_wait_msg(const struct kvaser_usb *dev, u8 id, - struct kvaser_msg *msg) -{ - struct kvaser_msg *tmp; - void *buf; - int actual_len; - int err; - int pos; - unsigned long to = jiffies + msecs_to_jiffies(USB_RECV_TIMEOUT); - - buf = kzalloc(RX_BUFFER_SIZE, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - do { - err = usb_bulk_msg(dev->udev, - usb_rcvbulkpipe(dev->udev, - dev->bulk_in->bEndpointAddress), - buf, RX_BUFFER_SIZE, &actual_len, - USB_RECV_TIMEOUT); - if (err < 0) - goto end; - - pos = 0; - while (pos <= actual_len - MSG_HEADER_LEN) { - tmp = buf + pos; - - /* Handle messages crossing the USB endpoint max packet - * size boundary. Check kvaser_usb_read_bulk_callback() - * for further details. - */ - if (tmp->len == 0) { - pos = round_up(pos, le16_to_cpu(dev->bulk_in-> - wMaxPacketSize)); - continue; - } - - if (pos + tmp->len > actual_len) { - dev_err_ratelimited(dev->udev->dev.parent, - "Format error\n"); - break; - } - - if (tmp->id == id) { - memcpy(msg, tmp, tmp->len); - goto end; - } - - pos += tmp->len; - } - } while (time_before(jiffies, to)); - - err = -EINVAL; - -end: - kfree(buf); - - return err; -} - -static int kvaser_usb_send_simple_msg(const struct kvaser_usb *dev, - u8 msg_id, int channel) -{ - struct kvaser_msg *msg; - int rc; - - msg = kmalloc(sizeof(*msg), GFP_KERNEL); - if (!msg) - return -ENOMEM; - - msg->id = msg_id; - msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple); - msg->u.simple.channel = channel; - msg->u.simple.tid = 0xff; - - rc = kvaser_usb_send_msg(dev, msg); - - kfree(msg); - return rc; -} - -static int kvaser_usb_get_software_info(struct kvaser_usb *dev) -{ - struct kvaser_msg msg; - int err; - - err = kvaser_usb_send_simple_msg(dev, CMD_GET_SOFTWARE_INFO, 0); - if (err) - return err; - - err = kvaser_usb_wait_msg(dev, CMD_GET_SOFTWARE_INFO_REPLY, &msg); - if (err) - return err; - - switch (dev->family) { - case KVASER_LEAF: - dev->fw_version = le32_to_cpu(msg.u.leaf.softinfo.fw_version); - dev->max_tx_urbs = - le16_to_cpu(msg.u.leaf.softinfo.max_outstanding_tx); - break; - case KVASER_USBCAN: - dev->fw_version = le32_to_cpu(msg.u.usbcan.softinfo.fw_version); - dev->max_tx_urbs = - le16_to_cpu(msg.u.usbcan.softinfo.max_outstanding_tx); - break; - } - - return 0; -} - -static int kvaser_usb_get_card_info(struct kvaser_usb *dev) -{ - struct kvaser_msg msg; - int err; - - err = kvaser_usb_send_simple_msg(dev, CMD_GET_CARD_INFO, 0); - if (err) - return err; - - err = kvaser_usb_wait_msg(dev, CMD_GET_CARD_INFO_REPLY, &msg); - if (err) - return err; - - dev->nchannels = msg.u.cardinfo.nchannels; - if ((dev->nchannels > MAX_NET_DEVICES) || - (dev->family == KVASER_USBCAN && - dev->nchannels > MAX_USBCAN_NET_DEVICES)) - return -EINVAL; - - return 0; -} - -static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - struct net_device_stats *stats; - struct kvaser_usb_tx_urb_context *context; - struct kvaser_usb_net_priv *priv; - struct sk_buff *skb; - struct can_frame *cf; - unsigned long flags; - u8 channel, tid; - - channel = msg->u.tx_acknowledge_header.channel; - tid = msg->u.tx_acknowledge_header.tid; - - if (channel >= dev->nchannels) { - dev_err(dev->udev->dev.parent, - "Invalid channel number (%d)\n", channel); - return; - } - - priv = dev->nets[channel]; - - if (!netif_device_present(priv->netdev)) - return; - - stats = &priv->netdev->stats; - - context = &priv->tx_contexts[tid % dev->max_tx_urbs]; - - /* Sometimes the state change doesn't come after a bus-off event */ - if (priv->can.restart_ms && - (priv->can.state >= CAN_STATE_BUS_OFF)) { - skb = alloc_can_err_skb(priv->netdev, &cf); - if (skb) { - cf->can_id |= CAN_ERR_RESTARTED; - - stats->rx_packets++; - stats->rx_bytes += cf->can_dlc; - netif_rx(skb); - } else { - netdev_err(priv->netdev, - "No memory left for err_skb\n"); - } - - priv->can.can_stats.restarts++; - netif_carrier_on(priv->netdev); - - priv->can.state = CAN_STATE_ERROR_ACTIVE; - } - - stats->tx_packets++; - stats->tx_bytes += context->dlc; - - spin_lock_irqsave(&priv->tx_contexts_lock, flags); - - can_get_echo_skb(priv->netdev, context->echo_index); - context->echo_index = dev->max_tx_urbs; - --priv->active_tx_contexts; - netif_wake_queue(priv->netdev); - - spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); -} - -static void kvaser_usb_simple_msg_callback(struct urb *urb) -{ - struct net_device *netdev = urb->context; - - kfree(urb->transfer_buffer); - - if (urb->status) - netdev_warn(netdev, "urb status received: %d\n", - urb->status); -} - -static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv *priv, - u8 msg_id) -{ - struct kvaser_usb *dev = priv->dev; - struct net_device *netdev = priv->netdev; - struct kvaser_msg *msg; - struct urb *urb; - void *buf; - int err; - - urb = usb_alloc_urb(0, GFP_ATOMIC); - if (!urb) - return -ENOMEM; - - buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC); - if (!buf) { - usb_free_urb(urb); - return -ENOMEM; - } - - msg = (struct kvaser_msg *)buf; - msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple); - msg->id = msg_id; - msg->u.simple.channel = priv->channel; - - usb_fill_bulk_urb(urb, dev->udev, - usb_sndbulkpipe(dev->udev, - dev->bulk_out->bEndpointAddress), - buf, msg->len, - kvaser_usb_simple_msg_callback, netdev); - usb_anchor_urb(urb, &priv->tx_submitted); - - err = usb_submit_urb(urb, GFP_ATOMIC); - if (err) { - netdev_err(netdev, "Error transmitting URB\n"); - usb_unanchor_urb(urb); - kfree(buf); - usb_free_urb(urb); - return err; - } - - usb_free_urb(urb); - - return 0; -} - -static void kvaser_usb_rx_error_update_can_state(struct kvaser_usb_net_priv *priv, - const struct kvaser_usb_error_summary *es, - struct can_frame *cf) -{ - struct kvaser_usb *dev = priv->dev; - struct net_device_stats *stats = &priv->netdev->stats; - enum can_state cur_state, new_state, tx_state, rx_state; - - netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status); - - new_state = cur_state = priv->can.state; - - if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) - new_state = CAN_STATE_BUS_OFF; - else if (es->status & M16C_STATE_BUS_PASSIVE) - new_state = CAN_STATE_ERROR_PASSIVE; - else if (es->status & M16C_STATE_BUS_ERROR) { - /* Guard against spurious error events after a busoff */ - if (cur_state < CAN_STATE_BUS_OFF) { - if ((es->txerr >= 128) || (es->rxerr >= 128)) - new_state = CAN_STATE_ERROR_PASSIVE; - else if ((es->txerr >= 96) || (es->rxerr >= 96)) - new_state = CAN_STATE_ERROR_WARNING; - else if (cur_state > CAN_STATE_ERROR_ACTIVE) - new_state = CAN_STATE_ERROR_ACTIVE; - } - } - - if (!es->status) - new_state = CAN_STATE_ERROR_ACTIVE; - - if (new_state != cur_state) { - tx_state = (es->txerr >= es->rxerr) ? new_state : 0; - rx_state = (es->txerr <= es->rxerr) ? new_state : 0; - - can_change_state(priv->netdev, cf, tx_state, rx_state); - } - - if (priv->can.restart_ms && - (cur_state >= CAN_STATE_BUS_OFF) && - (new_state < CAN_STATE_BUS_OFF)) { - priv->can.can_stats.restarts++; - } - - switch (dev->family) { - case KVASER_LEAF: - if (es->leaf.error_factor) { - priv->can.can_stats.bus_error++; - stats->rx_errors++; - } - break; - case KVASER_USBCAN: - if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR) - stats->tx_errors++; - if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR) - stats->rx_errors++; - if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) { - priv->can.can_stats.bus_error++; - } - break; - } - - priv->bec.txerr = es->txerr; - priv->bec.rxerr = es->rxerr; -} - -static void kvaser_usb_rx_error(const struct kvaser_usb *dev, - const struct kvaser_usb_error_summary *es) -{ - struct can_frame *cf, tmp_cf = { .can_id = CAN_ERR_FLAG, .can_dlc = CAN_ERR_DLC }; - struct sk_buff *skb; - struct net_device_stats *stats; - struct kvaser_usb_net_priv *priv; - enum can_state old_state, new_state; - - if (es->channel >= dev->nchannels) { - dev_err(dev->udev->dev.parent, - "Invalid channel number (%d)\n", es->channel); - return; - } - - priv = dev->nets[es->channel]; - stats = &priv->netdev->stats; - - /* Update all of the can interface's state and error counters before - * trying any memory allocation that can actually fail with -ENOMEM. - * - * We send a temporary stack-allocated error can frame to - * can_change_state() for the very same reason. - * - * TODO: Split can_change_state() responsibility between updating the - * can interface's state and counters, and the setting up of can error - * frame ID and data to userspace. Remove stack allocation afterwards. - */ - old_state = priv->can.state; - kvaser_usb_rx_error_update_can_state(priv, es, &tmp_cf); - new_state = priv->can.state; - - skb = alloc_can_err_skb(priv->netdev, &cf); - if (!skb) { - stats->rx_dropped++; - return; - } - memcpy(cf, &tmp_cf, sizeof(*cf)); - - if (new_state != old_state) { - if (es->status & - (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { - if (!priv->can.restart_ms) - kvaser_usb_simple_msg_async(priv, CMD_STOP_CHIP); - netif_carrier_off(priv->netdev); - } - - if (priv->can.restart_ms && - (old_state >= CAN_STATE_BUS_OFF) && - (new_state < CAN_STATE_BUS_OFF)) { - cf->can_id |= CAN_ERR_RESTARTED; - netif_carrier_on(priv->netdev); - } - } - - switch (dev->family) { - case KVASER_LEAF: - if (es->leaf.error_factor) { - cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT; - - if (es->leaf.error_factor & M16C_EF_ACKE) - cf->data[3] = CAN_ERR_PROT_LOC_ACK; - if (es->leaf.error_factor & M16C_EF_CRCE) - cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; - if (es->leaf.error_factor & M16C_EF_FORME) - cf->data[2] |= CAN_ERR_PROT_FORM; - if (es->leaf.error_factor & M16C_EF_STFE) - cf->data[2] |= CAN_ERR_PROT_STUFF; - if (es->leaf.error_factor & M16C_EF_BITE0) - cf->data[2] |= CAN_ERR_PROT_BIT0; - if (es->leaf.error_factor & M16C_EF_BITE1) - cf->data[2] |= CAN_ERR_PROT_BIT1; - if (es->leaf.error_factor & M16C_EF_TRE) - cf->data[2] |= CAN_ERR_PROT_TX; - } - break; - case KVASER_USBCAN: - if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) { - cf->can_id |= CAN_ERR_BUSERROR; - } - break; - } - - cf->data[6] = es->txerr; - cf->data[7] = es->rxerr; - - stats->rx_packets++; - stats->rx_bytes += cf->can_dlc; - netif_rx(skb); -} - -/* For USBCAN, report error to userspace iff the channels's errors counter - * has changed, or we're the only channel seeing a bus error state. - */ -static void kvaser_usbcan_conditionally_rx_error(const struct kvaser_usb *dev, - struct kvaser_usb_error_summary *es) -{ - struct kvaser_usb_net_priv *priv; - int channel; - bool report_error; - - channel = es->channel; - if (channel >= dev->nchannels) { - dev_err(dev->udev->dev.parent, - "Invalid channel number (%d)\n", channel); - return; - } - - priv = dev->nets[channel]; - report_error = false; - - if (es->txerr != priv->bec.txerr) { - es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR; - report_error = true; - } - if (es->rxerr != priv->bec.rxerr) { - es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR; - report_error = true; - } - if ((es->status & M16C_STATE_BUS_ERROR) && - !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) { - es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR; - report_error = true; - } - - if (report_error) - kvaser_usb_rx_error(dev, es); -} - -static void kvaser_usbcan_rx_error(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - struct kvaser_usb_error_summary es = { }; - - switch (msg->id) { - /* Sometimes errors are sent as unsolicited chip state events */ - case CMD_CHIP_STATE_EVENT: - es.channel = msg->u.usbcan.chip_state_event.channel; - es.status = msg->u.usbcan.chip_state_event.status; - es.txerr = msg->u.usbcan.chip_state_event.tx_errors_count; - es.rxerr = msg->u.usbcan.chip_state_event.rx_errors_count; - kvaser_usbcan_conditionally_rx_error(dev, &es); - break; - - case CMD_CAN_ERROR_EVENT: - es.channel = 0; - es.status = msg->u.usbcan.error_event.status_ch0; - es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch0; - es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch0; - es.usbcan.other_ch_status = - msg->u.usbcan.error_event.status_ch1; - kvaser_usbcan_conditionally_rx_error(dev, &es); - - /* The USBCAN firmware supports up to 2 channels. - * Now that ch0 was checked, check if ch1 has any errors. - */ - if (dev->nchannels == MAX_USBCAN_NET_DEVICES) { - es.channel = 1; - es.status = msg->u.usbcan.error_event.status_ch1; - es.txerr = msg->u.usbcan.error_event.tx_errors_count_ch1; - es.rxerr = msg->u.usbcan.error_event.rx_errors_count_ch1; - es.usbcan.other_ch_status = - msg->u.usbcan.error_event.status_ch0; - kvaser_usbcan_conditionally_rx_error(dev, &es); - } - break; - - default: - dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n", - msg->id); - } -} - -static void kvaser_leaf_rx_error(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - struct kvaser_usb_error_summary es = { }; - - switch (msg->id) { - case CMD_CAN_ERROR_EVENT: - es.channel = msg->u.leaf.error_event.channel; - es.status = msg->u.leaf.error_event.status; - es.txerr = msg->u.leaf.error_event.tx_errors_count; - es.rxerr = msg->u.leaf.error_event.rx_errors_count; - es.leaf.error_factor = msg->u.leaf.error_event.error_factor; - break; - case CMD_LEAF_LOG_MESSAGE: - es.channel = msg->u.leaf.log_message.channel; - es.status = msg->u.leaf.log_message.data[0]; - es.txerr = msg->u.leaf.log_message.data[2]; - es.rxerr = msg->u.leaf.log_message.data[3]; - es.leaf.error_factor = msg->u.leaf.log_message.data[1]; - break; - case CMD_CHIP_STATE_EVENT: - es.channel = msg->u.leaf.chip_state_event.channel; - es.status = msg->u.leaf.chip_state_event.status; - es.txerr = msg->u.leaf.chip_state_event.tx_errors_count; - es.rxerr = msg->u.leaf.chip_state_event.rx_errors_count; - es.leaf.error_factor = 0; - break; - default: - dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n", - msg->id); - return; - } - - kvaser_usb_rx_error(dev, &es); -} - -static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv, - const struct kvaser_msg *msg) -{ - struct can_frame *cf; - struct sk_buff *skb; - struct net_device_stats *stats = &priv->netdev->stats; - - if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | - MSG_FLAG_NERR)) { - netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n", - msg->u.rx_can_header.flag); - - stats->rx_errors++; - return; - } - - if (msg->u.rx_can_header.flag & MSG_FLAG_OVERRUN) { - stats->rx_over_errors++; - stats->rx_errors++; - - skb = alloc_can_err_skb(priv->netdev, &cf); - if (!skb) { - stats->rx_dropped++; - return; - } - - cf->can_id |= CAN_ERR_CRTL; - cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; - - stats->rx_packets++; - stats->rx_bytes += cf->can_dlc; - netif_rx(skb); - } -} - -static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - struct kvaser_usb_net_priv *priv; - struct can_frame *cf; - struct sk_buff *skb; - struct net_device_stats *stats; - u8 channel = msg->u.rx_can_header.channel; - const u8 *rx_msg = NULL; /* GCC */ - - if (channel >= dev->nchannels) { - dev_err(dev->udev->dev.parent, - "Invalid channel number (%d)\n", channel); - return; - } - - priv = dev->nets[channel]; - stats = &priv->netdev->stats; - - if ((msg->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) && - (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE)) { - kvaser_leaf_rx_error(dev, msg); - return; - } else if (msg->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | - MSG_FLAG_NERR | - MSG_FLAG_OVERRUN)) { - kvaser_usb_rx_can_err(priv, msg); - return; - } else if (msg->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) { - netdev_warn(priv->netdev, - "Unhandled frame (flags: 0x%02x)", - msg->u.rx_can_header.flag); - return; - } - - switch (dev->family) { - case KVASER_LEAF: - rx_msg = msg->u.leaf.rx_can.msg; - break; - case KVASER_USBCAN: - rx_msg = msg->u.usbcan.rx_can.msg; - break; - } - - skb = alloc_can_skb(priv->netdev, &cf); - if (!skb) { - stats->rx_dropped++; - return; - } - - if (dev->family == KVASER_LEAF && msg->id == CMD_LEAF_LOG_MESSAGE) { - cf->can_id = le32_to_cpu(msg->u.leaf.log_message.id); - if (cf->can_id & KVASER_EXTENDED_FRAME) - cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG; - else - cf->can_id &= CAN_SFF_MASK; - - cf->can_dlc = get_can_dlc(msg->u.leaf.log_message.dlc); - - if (msg->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME) - cf->can_id |= CAN_RTR_FLAG; - else - memcpy(cf->data, &msg->u.leaf.log_message.data, - cf->can_dlc); - } else { - cf->can_id = ((rx_msg[0] & 0x1f) << 6) | (rx_msg[1] & 0x3f); - - if (msg->id == CMD_RX_EXT_MESSAGE) { - cf->can_id <<= 18; - cf->can_id |= ((rx_msg[2] & 0x0f) << 14) | - ((rx_msg[3] & 0xff) << 6) | - (rx_msg[4] & 0x3f); - cf->can_id |= CAN_EFF_FLAG; - } - - cf->can_dlc = get_can_dlc(rx_msg[5]); - - if (msg->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME) - cf->can_id |= CAN_RTR_FLAG; - else - memcpy(cf->data, &rx_msg[6], - cf->can_dlc); - } - - stats->rx_packets++; - stats->rx_bytes += cf->can_dlc; - netif_rx(skb); -} - -static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - struct kvaser_usb_net_priv *priv; - u8 channel = msg->u.simple.channel; - - if (channel >= dev->nchannels) { - dev_err(dev->udev->dev.parent, - "Invalid channel number (%d)\n", channel); - return; - } - - priv = dev->nets[channel]; - - if (completion_done(&priv->start_comp) && - netif_queue_stopped(priv->netdev)) { - netif_wake_queue(priv->netdev); - } else { - netif_start_queue(priv->netdev); - complete(&priv->start_comp); - } -} - -static void kvaser_usb_stop_chip_reply(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - struct kvaser_usb_net_priv *priv; - u8 channel = msg->u.simple.channel; - - if (channel >= dev->nchannels) { - dev_err(dev->udev->dev.parent, - "Invalid channel number (%d)\n", channel); - return; - } - - priv = dev->nets[channel]; - - complete(&priv->stop_comp); -} - -static void kvaser_usb_handle_message(const struct kvaser_usb *dev, - const struct kvaser_msg *msg) -{ - switch (msg->id) { - case CMD_START_CHIP_REPLY: - kvaser_usb_start_chip_reply(dev, msg); - break; - - case CMD_STOP_CHIP_REPLY: - kvaser_usb_stop_chip_reply(dev, msg); - break; - - case CMD_RX_STD_MESSAGE: - case CMD_RX_EXT_MESSAGE: - kvaser_usb_rx_can_msg(dev, msg); - break; - - case CMD_LEAF_LOG_MESSAGE: - if (dev->family != KVASER_LEAF) - goto warn; - kvaser_usb_rx_can_msg(dev, msg); - break; - - case CMD_CHIP_STATE_EVENT: - case CMD_CAN_ERROR_EVENT: - if (dev->family == KVASER_LEAF) - kvaser_leaf_rx_error(dev, msg); - else - kvaser_usbcan_rx_error(dev, msg); - break; - - case CMD_TX_ACKNOWLEDGE: - kvaser_usb_tx_acknowledge(dev, msg); - break; - - /* Ignored messages */ - case CMD_USBCAN_CLOCK_OVERFLOW_EVENT: - if (dev->family != KVASER_USBCAN) - goto warn; - break; - - case CMD_FLUSH_QUEUE_REPLY: - if (dev->family != KVASER_LEAF) - goto warn; - break; - - default: -warn: dev_warn(dev->udev->dev.parent, - "Unhandled message (%d)\n", msg->id); - break; - } -} - -static void kvaser_usb_read_bulk_callback(struct urb *urb) -{ - struct kvaser_usb *dev = urb->context; - struct kvaser_msg *msg; - int pos = 0; - int err, i; - - switch (urb->status) { - case 0: - break; - case -ENOENT: - case -EPIPE: - case -EPROTO: - case -ESHUTDOWN: - return; - default: - dev_info(dev->udev->dev.parent, "Rx URB aborted (%d)\n", - urb->status); - goto resubmit_urb; - } - - while (pos <= (int)(urb->actual_length - MSG_HEADER_LEN)) { - msg = urb->transfer_buffer + pos; - - /* The Kvaser firmware can only read and write messages that - * does not cross the USB's endpoint wMaxPacketSize boundary. - * If a follow-up command crosses such boundary, firmware puts - * a placeholder zero-length command in its place then aligns - * the real command to the next max packet size. - * - * Handle such cases or we're going to miss a significant - * number of events in case of a heavy rx load on the bus. - */ - if (msg->len == 0) { - pos = round_up(pos, le16_to_cpu(dev->bulk_in-> - wMaxPacketSize)); - continue; - } - - if (pos + msg->len > urb->actual_length) { - dev_err_ratelimited(dev->udev->dev.parent, - "Format error\n"); - break; - } - - kvaser_usb_handle_message(dev, msg); - pos += msg->len; - } - -resubmit_urb: - usb_fill_bulk_urb(urb, dev->udev, - usb_rcvbulkpipe(dev->udev, - dev->bulk_in->bEndpointAddress), - urb->transfer_buffer, RX_BUFFER_SIZE, - kvaser_usb_read_bulk_callback, dev); - - err = usb_submit_urb(urb, GFP_ATOMIC); - if (err == -ENODEV) { - for (i = 0; i < dev->nchannels; i++) { - if (!dev->nets[i]) - continue; - - netif_device_detach(dev->nets[i]->netdev); - } - } else if (err) { - dev_err(dev->udev->dev.parent, - "Failed resubmitting read bulk urb: %d\n", err); - } - - return; -} - -static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) -{ - int i, err = 0; - - if (dev->rxinitdone) - return 0; - - for (i = 0; i < MAX_RX_URBS; i++) { - struct urb *urb = NULL; - u8 *buf = NULL; - dma_addr_t buf_dma; - - urb = usb_alloc_urb(0, GFP_KERNEL); - if (!urb) { - err = -ENOMEM; - break; - } - - buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, - GFP_KERNEL, &buf_dma); - if (!buf) { - dev_warn(dev->udev->dev.parent, - "No memory left for USB buffer\n"); - usb_free_urb(urb); - err = -ENOMEM; - break; - } - - usb_fill_bulk_urb(urb, dev->udev, - usb_rcvbulkpipe(dev->udev, - dev->bulk_in->bEndpointAddress), - buf, RX_BUFFER_SIZE, - kvaser_usb_read_bulk_callback, - dev); - urb->transfer_dma = buf_dma; - urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - usb_anchor_urb(urb, &dev->rx_submitted); - - err = usb_submit_urb(urb, GFP_KERNEL); - if (err) { - usb_unanchor_urb(urb); - usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, - buf_dma); - usb_free_urb(urb); - break; - } - - dev->rxbuf[i] = buf; - dev->rxbuf_dma[i] = buf_dma; - - usb_free_urb(urb); - } - - if (i == 0) { - dev_warn(dev->udev->dev.parent, - "Cannot setup read URBs, error %d\n", err); - return err; - } else if (i < MAX_RX_URBS) { - dev_warn(dev->udev->dev.parent, - "RX performances may be slow\n"); - } - - dev->rxinitdone = true; - - return 0; -} - -static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv *priv) -{ - struct kvaser_msg *msg; - int rc; - - msg = kmalloc(sizeof(*msg), GFP_KERNEL); - if (!msg) - return -ENOMEM; - - msg->id = CMD_SET_CTRL_MODE; - msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_ctrl_mode); - msg->u.ctrl_mode.tid = 0xff; - msg->u.ctrl_mode.channel = priv->channel; - - if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) - msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT; - else - msg->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL; - - rc = kvaser_usb_send_msg(priv->dev, msg); - - kfree(msg); - return rc; -} - -static int kvaser_usb_start_chip(struct kvaser_usb_net_priv *priv) -{ - int err; - - init_completion(&priv->start_comp); - - err = kvaser_usb_send_simple_msg(priv->dev, CMD_START_CHIP, - priv->channel); - if (err) - return err; - - if (!wait_for_completion_timeout(&priv->start_comp, - msecs_to_jiffies(START_TIMEOUT))) - return -ETIMEDOUT; - - return 0; -} - -static int kvaser_usb_open(struct net_device *netdev) -{ - struct kvaser_usb_net_priv *priv = netdev_priv(netdev); - struct kvaser_usb *dev = priv->dev; - int err; - - err = open_candev(netdev); - if (err) - return err; - - err = kvaser_usb_setup_rx_urbs(dev); - if (err) - goto error; - - err = kvaser_usb_set_opt_mode(priv); - if (err) - goto error; - - err = kvaser_usb_start_chip(priv); - if (err) { - netdev_warn(netdev, "Cannot start device, error %d\n", err); - goto error; - } - - priv->can.state = CAN_STATE_ERROR_ACTIVE; - - return 0; - -error: - close_candev(netdev); - return err; -} - -static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) -{ - int i, max_tx_urbs; - - max_tx_urbs = priv->dev->max_tx_urbs; - - priv->active_tx_contexts = 0; - for (i = 0; i < max_tx_urbs; i++) - priv->tx_contexts[i].echo_index = max_tx_urbs; -} - -/* This method might sleep. Do not call it in the atomic context - * of URB completions. - */ -static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) -{ - usb_kill_anchored_urbs(&priv->tx_submitted); - kvaser_usb_reset_tx_urb_contexts(priv); -} - -static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) -{ - int i; - - usb_kill_anchored_urbs(&dev->rx_submitted); - - for (i = 0; i < MAX_RX_URBS; i++) - usb_free_coherent(dev->udev, RX_BUFFER_SIZE, - dev->rxbuf[i], - dev->rxbuf_dma[i]); - - for (i = 0; i < dev->nchannels; i++) { - struct kvaser_usb_net_priv *priv = dev->nets[i]; - - if (priv) - kvaser_usb_unlink_tx_urbs(priv); - } -} - -static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv *priv) -{ - int err; - - init_completion(&priv->stop_comp); - - err = kvaser_usb_send_simple_msg(priv->dev, CMD_STOP_CHIP, - priv->channel); - if (err) - return err; - - if (!wait_for_completion_timeout(&priv->stop_comp, - msecs_to_jiffies(STOP_TIMEOUT))) - return -ETIMEDOUT; - - return 0; -} - -static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv *priv) -{ - struct kvaser_msg *msg; - int rc; - - msg = kmalloc(sizeof(*msg), GFP_KERNEL); - if (!msg) - return -ENOMEM; - - msg->id = CMD_FLUSH_QUEUE; - msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_flush_queue); - msg->u.flush_queue.channel = priv->channel; - msg->u.flush_queue.flags = 0x00; - - rc = kvaser_usb_send_msg(priv->dev, msg); - - kfree(msg); - return rc; -} - -static int kvaser_usb_close(struct net_device *netdev) -{ - struct kvaser_usb_net_priv *priv = netdev_priv(netdev); - struct kvaser_usb *dev = priv->dev; - int err; - - netif_stop_queue(netdev); - - err = kvaser_usb_flush_queue(priv); - if (err) - netdev_warn(netdev, "Cannot flush queue, error %d\n", err); - - err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, priv->channel); - if (err) - netdev_warn(netdev, "Cannot reset card, error %d\n", err); - - err = kvaser_usb_stop_chip(priv); - if (err) - netdev_warn(netdev, "Cannot stop device, error %d\n", err); - - /* reset tx contexts */ - kvaser_usb_unlink_tx_urbs(priv); - - priv->can.state = CAN_STATE_STOPPED; - close_candev(priv->netdev); - - return 0; -} - -static void kvaser_usb_write_bulk_callback(struct urb *urb) -{ - struct kvaser_usb_tx_urb_context *context = urb->context; - struct kvaser_usb_net_priv *priv; - struct net_device *netdev; - - if (WARN_ON(!context)) - return; - - priv = context->priv; - netdev = priv->netdev; - - kfree(urb->transfer_buffer); - - if (!netif_device_present(netdev)) - return; - - if (urb->status) - netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); -} - -static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, - struct net_device *netdev) -{ - struct kvaser_usb_net_priv *priv = netdev_priv(netdev); - struct kvaser_usb *dev = priv->dev; - struct net_device_stats *stats = &netdev->stats; - struct can_frame *cf = (struct can_frame *)skb->data; - struct kvaser_usb_tx_urb_context *context = NULL; - struct urb *urb; - void *buf; - struct kvaser_msg *msg; - int i, err, ret = NETDEV_TX_OK; - u8 *msg_tx_can_flags = NULL; /* GCC */ - unsigned long flags; - - if (can_dropped_invalid_skb(netdev, skb)) - return NETDEV_TX_OK; - - urb = usb_alloc_urb(0, GFP_ATOMIC); - if (!urb) { - stats->tx_dropped++; - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } - - buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC); - if (!buf) { - stats->tx_dropped++; - dev_kfree_skb(skb); - goto freeurb; - } - - msg = buf; - msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_tx_can); - msg->u.tx_can.channel = priv->channel; - - switch (dev->family) { - case KVASER_LEAF: - msg_tx_can_flags = &msg->u.tx_can.leaf.flags; - break; - case KVASER_USBCAN: - msg_tx_can_flags = &msg->u.tx_can.usbcan.flags; - break; - } - - *msg_tx_can_flags = 0; - - if (cf->can_id & CAN_EFF_FLAG) { - msg->id = CMD_TX_EXT_MESSAGE; - msg->u.tx_can.msg[0] = (cf->can_id >> 24) & 0x1f; - msg->u.tx_can.msg[1] = (cf->can_id >> 18) & 0x3f; - msg->u.tx_can.msg[2] = (cf->can_id >> 14) & 0x0f; - msg->u.tx_can.msg[3] = (cf->can_id >> 6) & 0xff; - msg->u.tx_can.msg[4] = cf->can_id & 0x3f; - } else { - msg->id = CMD_TX_STD_MESSAGE; - msg->u.tx_can.msg[0] = (cf->can_id >> 6) & 0x1f; - msg->u.tx_can.msg[1] = cf->can_id & 0x3f; - } - - msg->u.tx_can.msg[5] = cf->can_dlc; - memcpy(&msg->u.tx_can.msg[6], cf->data, cf->can_dlc); - - if (cf->can_id & CAN_RTR_FLAG) - *msg_tx_can_flags |= MSG_FLAG_REMOTE_FRAME; - - spin_lock_irqsave(&priv->tx_contexts_lock, flags); - for (i = 0; i < dev->max_tx_urbs; i++) { - if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) { - context = &priv->tx_contexts[i]; - - context->echo_index = i; - can_put_echo_skb(skb, netdev, context->echo_index); - ++priv->active_tx_contexts; - if (priv->active_tx_contexts >= dev->max_tx_urbs) - netif_stop_queue(netdev); - - break; - } - } - spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); - - /* This should never happen; it implies a flow control bug */ - if (!context) { - netdev_warn(netdev, "cannot find free context\n"); - - kfree(buf); - ret = NETDEV_TX_BUSY; - goto freeurb; - } - - context->priv = priv; - context->dlc = cf->can_dlc; - - msg->u.tx_can.tid = context->echo_index; - - usb_fill_bulk_urb(urb, dev->udev, - usb_sndbulkpipe(dev->udev, - dev->bulk_out->bEndpointAddress), - buf, msg->len, - kvaser_usb_write_bulk_callback, context); - usb_anchor_urb(urb, &priv->tx_submitted); - - err = usb_submit_urb(urb, GFP_ATOMIC); - if (unlikely(err)) { - spin_lock_irqsave(&priv->tx_contexts_lock, flags); - - can_free_echo_skb(netdev, context->echo_index); - context->echo_index = dev->max_tx_urbs; - --priv->active_tx_contexts; - netif_wake_queue(netdev); - - spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); - - usb_unanchor_urb(urb); - kfree(buf); - - stats->tx_dropped++; - - if (err == -ENODEV) - netif_device_detach(netdev); - else - netdev_warn(netdev, "Failed tx_urb %d\n", err); - - goto freeurb; - } - - ret = NETDEV_TX_OK; - -freeurb: - usb_free_urb(urb); - return ret; -} - -static const struct net_device_ops kvaser_usb_netdev_ops = { - .ndo_open = kvaser_usb_open, - .ndo_stop = kvaser_usb_close, - .ndo_start_xmit = kvaser_usb_start_xmit, - .ndo_change_mtu = can_change_mtu, -}; - -static const struct can_bittiming_const kvaser_usb_bittiming_const = { - .name = "kvaser_usb", - .tseg1_min = KVASER_USB_TSEG1_MIN, - .tseg1_max = KVASER_USB_TSEG1_MAX, - .tseg2_min = KVASER_USB_TSEG2_MIN, - .tseg2_max = KVASER_USB_TSEG2_MAX, - .sjw_max = KVASER_USB_SJW_MAX, - .brp_min = KVASER_USB_BRP_MIN, - .brp_max = KVASER_USB_BRP_MAX, - .brp_inc = KVASER_USB_BRP_INC, -}; - -static int kvaser_usb_set_bittiming(struct net_device *netdev) -{ - struct kvaser_usb_net_priv *priv = netdev_priv(netdev); - struct can_bittiming *bt = &priv->can.bittiming; - struct kvaser_usb *dev = priv->dev; - struct kvaser_msg *msg; - int rc; - - msg = kmalloc(sizeof(*msg), GFP_KERNEL); - if (!msg) - return -ENOMEM; - - msg->id = CMD_SET_BUS_PARAMS; - msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_busparams); - msg->u.busparams.channel = priv->channel; - msg->u.busparams.tid = 0xff; - msg->u.busparams.bitrate = cpu_to_le32(bt->bitrate); - msg->u.busparams.sjw = bt->sjw; - msg->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1; - msg->u.busparams.tseg2 = bt->phase_seg2; - - if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) - msg->u.busparams.no_samp = 3; - else - msg->u.busparams.no_samp = 1; - - rc = kvaser_usb_send_msg(dev, msg); - - kfree(msg); - return rc; -} - -static int kvaser_usb_set_mode(struct net_device *netdev, - enum can_mode mode) -{ - struct kvaser_usb_net_priv *priv = netdev_priv(netdev); - int err; - - switch (mode) { - case CAN_MODE_START: - err = kvaser_usb_simple_msg_async(priv, CMD_START_CHIP); - if (err) - return err; - break; - default: - return -EOPNOTSUPP; - } - - return 0; -} - -static int kvaser_usb_get_berr_counter(const struct net_device *netdev, - struct can_berr_counter *bec) -{ - struct kvaser_usb_net_priv *priv = netdev_priv(netdev); - - *bec = priv->bec; - - return 0; -} - -static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) -{ - int i; - - for (i = 0; i < dev->nchannels; i++) { - if (!dev->nets[i]) - continue; - - unregister_candev(dev->nets[i]->netdev); - } - - kvaser_usb_unlink_all_urbs(dev); - - for (i = 0; i < dev->nchannels; i++) { - if (!dev->nets[i]) - continue; - - free_candev(dev->nets[i]->netdev); - } -} - -static int kvaser_usb_init_one(struct usb_interface *intf, - const struct usb_device_id *id, int channel) -{ - struct kvaser_usb *dev = usb_get_intfdata(intf); - struct net_device *netdev; - struct kvaser_usb_net_priv *priv; - int err; - - err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, channel); - if (err) - return err; - - netdev = alloc_candev(sizeof(*priv) + - dev->max_tx_urbs * sizeof(*priv->tx_contexts), - dev->max_tx_urbs); - if (!netdev) { - dev_err(&intf->dev, "Cannot alloc candev\n"); - return -ENOMEM; - } - - priv = netdev_priv(netdev); - - init_usb_anchor(&priv->tx_submitted); - init_completion(&priv->start_comp); - init_completion(&priv->stop_comp); - - priv->dev = dev; - priv->netdev = netdev; - priv->channel = channel; - - spin_lock_init(&priv->tx_contexts_lock); - kvaser_usb_reset_tx_urb_contexts(priv); - - priv->can.state = CAN_STATE_STOPPED; - priv->can.clock.freq = CAN_USB_CLOCK; - priv->can.bittiming_const = &kvaser_usb_bittiming_const; - priv->can.do_set_bittiming = kvaser_usb_set_bittiming; - priv->can.do_set_mode = kvaser_usb_set_mode; - if (id->driver_info & KVASER_HAS_TXRX_ERRORS) - priv->can.do_get_berr_counter = kvaser_usb_get_berr_counter; - priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES; - if (id->driver_info & KVASER_HAS_SILENT_MODE) - priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; - - netdev->flags |= IFF_ECHO; - - netdev->netdev_ops = &kvaser_usb_netdev_ops; - - SET_NETDEV_DEV(netdev, &intf->dev); - netdev->dev_id = channel; - - dev->nets[channel] = priv; - - err = register_candev(netdev); - if (err) { - dev_err(&intf->dev, "Failed to register can device\n"); - free_candev(netdev); - dev->nets[channel] = NULL; - return err; - } - - netdev_dbg(netdev, "device registered\n"); - - return 0; -} - -static int kvaser_usb_get_endpoints(const struct usb_interface *intf, - struct usb_endpoint_descriptor **in, - struct usb_endpoint_descriptor **out) -{ - const struct usb_host_interface *iface_desc; - struct usb_endpoint_descriptor *endpoint; - int i; - - iface_desc = &intf->altsetting[0]; - - for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { - endpoint = &iface_desc->endpoint[i].desc; - - if (!*in && usb_endpoint_is_bulk_in(endpoint)) - *in = endpoint; - - if (!*out && usb_endpoint_is_bulk_out(endpoint)) - *out = endpoint; - - /* use first bulk endpoint for in and out */ - if (*in && *out) - return 0; - } - - return -ENODEV; -} - -static int kvaser_usb_probe(struct usb_interface *intf, - const struct usb_device_id *id) -{ - struct kvaser_usb *dev; - int err = -ENOMEM; - int i, retry = 3; - - dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); - if (!dev) - return -ENOMEM; - - if (kvaser_is_leaf(id)) { - dev->family = KVASER_LEAF; - } else if (kvaser_is_usbcan(id)) { - dev->family = KVASER_USBCAN; - } else { - dev_err(&intf->dev, - "Product ID (%d) does not belong to any known Kvaser USB family", - id->idProduct); - return -ENODEV; - } - - err = kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out); - if (err) { - dev_err(&intf->dev, "Cannot get usb endpoint(s)"); - return err; - } - - dev->udev = interface_to_usbdev(intf); - - init_usb_anchor(&dev->rx_submitted); - - usb_set_intfdata(intf, dev); - - /* On some x86 laptops, plugging a Kvaser device again after - * an unplug makes the firmware always ignore the very first - * command. For such a case, provide some room for retries - * instead of completely exiting the driver. - */ - do { - err = kvaser_usb_get_software_info(dev); - } while (--retry && err == -ETIMEDOUT); - - if (err) { - dev_err(&intf->dev, - "Cannot get software infos, error %d\n", err); - return err; - } - - dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", - ((dev->fw_version >> 24) & 0xff), - ((dev->fw_version >> 16) & 0xff), - (dev->fw_version & 0xffff)); - - dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs); - - err = kvaser_usb_get_card_info(dev); - if (err) { - dev_err(&intf->dev, - "Cannot get card infos, error %d\n", err); - return err; - } - - for (i = 0; i < dev->nchannels; i++) { - err = kvaser_usb_init_one(intf, id, i); - if (err) { - kvaser_usb_remove_interfaces(dev); - return err; - } - } - - return 0; -} - -static void kvaser_usb_disconnect(struct usb_interface *intf) -{ - struct kvaser_usb *dev = usb_get_intfdata(intf); - - usb_set_intfdata(intf, NULL); - - if (!dev) - return; - - kvaser_usb_remove_interfaces(dev); -} - -static struct usb_driver kvaser_usb_driver = { - .name = "kvaser_usb", - .probe = kvaser_usb_probe, - .disconnect = kvaser_usb_disconnect, - .id_table = kvaser_usb_table, -}; - -module_usb_driver(kvaser_usb_driver); - -MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); -MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/net/can/usb/kvaser_usb/Makefile b/drivers/net/can/usb/kvaser_usb/Makefile new file mode 100644 index 000000000000..9f41ddab6a5a --- /dev/null +++ b/drivers/net/can/usb/kvaser_usb/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb.o +kvaser_usb-y = kvaser_usb_core.o kvaser_usb_leaf.o kvaser_usb_hydra.o diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb.h b/drivers/net/can/usb/kvaser_usb/kvaser_usb.h new file mode 100644 index 000000000000..390b6bde883c --- /dev/null +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb.h @@ -0,0 +1,188 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Parts of this driver are based on the following: + * - Kvaser linux leaf driver (version 4.78) + * - CAN driver for esd CAN-USB/2 + * - Kvaser linux usbcanII driver (version 5.3) + * - Kvaser linux mhydra driver (version 5.24) + * + * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. + * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh + * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> + * Copyright (C) 2015 Valeo S.A. + */ + +#ifndef KVASER_USB_H +#define KVASER_USB_H + +/* Kvaser USB CAN dongles are divided into three major platforms: + * - Hydra: Running firmware labeled as 'mhydra' + * - Leaf: Based on Renesas M32C or Freescale i.MX28, running firmware labeled + * as 'filo' + * - UsbcanII: Based on Renesas M16C, running firmware labeled as 'helios' + */ + +#include <linux/completion.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/usb.h> + +#include <linux/can.h> +#include <linux/can/dev.h> + +#define KVASER_USB_MAX_RX_URBS 4 +#define KVASER_USB_MAX_TX_URBS 128 +#define KVASER_USB_TIMEOUT 1000 /* msecs */ +#define KVASER_USB_RX_BUFFER_SIZE 3072 +#define KVASER_USB_MAX_NET_DEVICES 5 + +/* USB devices features */ +#define KVASER_USB_HAS_SILENT_MODE BIT(0) +#define KVASER_USB_HAS_TXRX_ERRORS BIT(1) + +/* Device capabilities */ +#define KVASER_USB_CAP_BERR_CAP 0x01 +#define KVASER_USB_CAP_EXT_CAP 0x02 +#define KVASER_USB_HYDRA_CAP_EXT_CMD 0x04 + +struct kvaser_usb_dev_cfg; + +enum kvaser_usb_leaf_family { + KVASER_LEAF, + KVASER_USBCAN, +}; + +#define KVASER_USB_HYDRA_MAX_CMD_LEN 128 +struct kvaser_usb_dev_card_data_hydra { + u8 channel_to_he[KVASER_USB_MAX_NET_DEVICES]; + u8 sysdbg_he; + spinlock_t transid_lock; /* lock for transid */ + u16 transid; + /* lock for usb_rx_leftover and usb_rx_leftover_len */ + spinlock_t usb_rx_leftover_lock; + u8 usb_rx_leftover[KVASER_USB_HYDRA_MAX_CMD_LEN]; + u8 usb_rx_leftover_len; +}; +struct kvaser_usb_dev_card_data { + u32 ctrlmode_supported; + u32 capabilities; + union { + struct { + enum kvaser_usb_leaf_family family; + } leaf; + struct kvaser_usb_dev_card_data_hydra hydra; + }; +}; + +/* Context for an outstanding, not yet ACKed, transmission */ +struct kvaser_usb_tx_urb_context { + struct kvaser_usb_net_priv *priv; + u32 echo_index; + int dlc; +}; + +struct kvaser_usb { + struct usb_device *udev; + struct usb_interface *intf; + struct kvaser_usb_net_priv *nets[KVASER_USB_MAX_NET_DEVICES]; + const struct kvaser_usb_dev_ops *ops; + const struct kvaser_usb_dev_cfg *cfg; + + struct usb_endpoint_descriptor *bulk_in, *bulk_out; + struct usb_anchor rx_submitted; + + /* @max_tx_urbs: Firmware-reported maximum number of outstanding, + * not yet ACKed, transmissions on this device. This value is + * also used as a sentinel for marking free tx contexts. + */ + u32 fw_version; + unsigned int nchannels; + unsigned int max_tx_urbs; + struct kvaser_usb_dev_card_data card_data; + + bool rxinitdone; + void *rxbuf[KVASER_USB_MAX_RX_URBS]; + dma_addr_t rxbuf_dma[KVASER_USB_MAX_RX_URBS]; +}; + +struct kvaser_usb_net_priv { + struct can_priv can; + struct can_berr_counter bec; + + struct kvaser_usb *dev; + struct net_device *netdev; + int channel; + + struct completion start_comp, stop_comp, flush_comp; + struct usb_anchor tx_submitted; + + spinlock_t tx_contexts_lock; /* lock for active_tx_contexts */ + int active_tx_contexts; + struct kvaser_usb_tx_urb_context tx_contexts[]; +}; + +/** + * struct kvaser_usb_dev_ops - Device specific functions + * @dev_set_mode: used for can.do_set_mode + * @dev_set_bittiming: used for can.do_set_bittiming + * @dev_set_data_bittiming: used for can.do_set_data_bittiming + * @dev_get_berr_counter: used for can.do_get_berr_counter + * + * @dev_setup_endpoints: setup USB in and out endpoints + * @dev_init_card: initialize card + * @dev_get_software_info: get software info + * @dev_get_software_details: get software details + * @dev_get_card_info: get card info + * @dev_get_capabilities: discover device capabilities + * + * @dev_set_opt_mode: set ctrlmod + * @dev_start_chip: start the CAN controller + * @dev_stop_chip: stop the CAN controller + * @dev_reset_chip: reset the CAN controller + * @dev_flush_queue: flush outstanding CAN messages + * @dev_read_bulk_callback: handle incoming commands + * @dev_frame_to_cmd: translate struct can_frame into device command + */ +struct kvaser_usb_dev_ops { + int (*dev_set_mode)(struct net_device *netdev, enum can_mode mode); + int (*dev_set_bittiming)(struct net_device *netdev); + int (*dev_set_data_bittiming)(struct net_device *netdev); + int (*dev_get_berr_counter)(const struct net_device *netdev, + struct can_berr_counter *bec); + int (*dev_setup_endpoints)(struct kvaser_usb *dev); + int (*dev_init_card)(struct kvaser_usb *dev); + int (*dev_get_software_info)(struct kvaser_usb *dev); + int (*dev_get_software_details)(struct kvaser_usb *dev); + int (*dev_get_card_info)(struct kvaser_usb *dev); + int (*dev_get_capabilities)(struct kvaser_usb *dev); + int (*dev_set_opt_mode)(const struct kvaser_usb_net_priv *priv); + int (*dev_start_chip)(struct kvaser_usb_net_priv *priv); + int (*dev_stop_chip)(struct kvaser_usb_net_priv *priv); + int (*dev_reset_chip)(struct kvaser_usb *dev, int channel); + int (*dev_flush_queue)(struct kvaser_usb_net_priv *priv); + void (*dev_read_bulk_callback)(struct kvaser_usb *dev, void *buf, + int len); + void *(*dev_frame_to_cmd)(const struct kvaser_usb_net_priv *priv, + const struct sk_buff *skb, int *frame_len, + int *cmd_len, u16 transid); +}; + +struct kvaser_usb_dev_cfg { + const struct can_clock clock; + const unsigned int timestamp_freq; + const struct can_bittiming_const * const bittiming_const; + const struct can_bittiming_const * const data_bittiming_const; +}; + +extern const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops; +extern const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops; + +int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, + int *actual_len); + +int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len); + +int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, + int len); + +int kvaser_usb_can_rx_over_error(struct net_device *netdev); +#endif /* KVASER_USB_H */ diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c new file mode 100644 index 000000000000..b939a4c10b84 --- /dev/null +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c @@ -0,0 +1,835 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Parts of this driver are based on the following: + * - Kvaser linux leaf driver (version 4.78) + * - CAN driver for esd CAN-USB/2 + * - Kvaser linux usbcanII driver (version 5.3) + * - Kvaser linux mhydra driver (version 5.24) + * + * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. + * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh + * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> + * Copyright (C) 2015 Valeo S.A. + */ + +#include <linux/completion.h> +#include <linux/device.h> +#include <linux/gfp.h> +#include <linux/if.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/usb.h> + +#include <linux/can.h> +#include <linux/can/dev.h> +#include <linux/can/error.h> +#include <linux/can/netlink.h> + +#include "kvaser_usb.h" + +/* Kvaser USB vendor id. */ +#define KVASER_VENDOR_ID 0x0bfd + +/* Kvaser Leaf USB devices product ids */ +#define USB_LEAF_DEVEL_PRODUCT_ID 10 +#define USB_LEAF_LITE_PRODUCT_ID 11 +#define USB_LEAF_PRO_PRODUCT_ID 12 +#define USB_LEAF_SPRO_PRODUCT_ID 14 +#define USB_LEAF_PRO_LS_PRODUCT_ID 15 +#define USB_LEAF_PRO_SWC_PRODUCT_ID 16 +#define USB_LEAF_PRO_LIN_PRODUCT_ID 17 +#define USB_LEAF_SPRO_LS_PRODUCT_ID 18 +#define USB_LEAF_SPRO_SWC_PRODUCT_ID 19 +#define USB_MEMO2_DEVEL_PRODUCT_ID 22 +#define USB_MEMO2_HSHS_PRODUCT_ID 23 +#define USB_UPRO_HSHS_PRODUCT_ID 24 +#define USB_LEAF_LITE_GI_PRODUCT_ID 25 +#define USB_LEAF_PRO_OBDII_PRODUCT_ID 26 +#define USB_MEMO2_HSLS_PRODUCT_ID 27 +#define USB_LEAF_LITE_CH_PRODUCT_ID 28 +#define USB_BLACKBIRD_SPRO_PRODUCT_ID 29 +#define USB_OEM_MERCURY_PRODUCT_ID 34 +#define USB_OEM_LEAF_PRODUCT_ID 35 +#define USB_CAN_R_PRODUCT_ID 39 +#define USB_LEAF_LITE_V2_PRODUCT_ID 288 +#define USB_MINI_PCIE_HS_PRODUCT_ID 289 +#define USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID 290 +#define USB_USBCAN_LIGHT_2HS_PRODUCT_ID 291 +#define USB_MINI_PCIE_2HS_PRODUCT_ID 292 + +/* Kvaser USBCan-II devices product ids */ +#define USB_USBCAN_REVB_PRODUCT_ID 2 +#define USB_VCI2_PRODUCT_ID 3 +#define USB_USBCAN2_PRODUCT_ID 4 +#define USB_MEMORATOR_PRODUCT_ID 5 + +/* Kvaser Minihydra USB devices product ids */ +#define USB_BLACKBIRD_V2_PRODUCT_ID 258 +#define USB_MEMO_PRO_5HS_PRODUCT_ID 260 +#define USB_USBCAN_PRO_5HS_PRODUCT_ID 261 +#define USB_USBCAN_LIGHT_4HS_PRODUCT_ID 262 +#define USB_LEAF_PRO_HS_V2_PRODUCT_ID 263 +#define USB_USBCAN_PRO_2HS_V2_PRODUCT_ID 264 +#define USB_MEMO_2HS_PRODUCT_ID 265 +#define USB_MEMO_PRO_2HS_V2_PRODUCT_ID 266 +#define USB_HYBRID_CANLIN_PRODUCT_ID 267 +#define USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID 268 +#define USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID 269 +#define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 270 + +static inline bool kvaser_is_leaf(const struct usb_device_id *id) +{ + return (id->idProduct >= USB_LEAF_DEVEL_PRODUCT_ID && + id->idProduct <= USB_CAN_R_PRODUCT_ID) || + (id->idProduct >= USB_LEAF_LITE_V2_PRODUCT_ID && + id->idProduct <= USB_MINI_PCIE_2HS_PRODUCT_ID); +} + +static inline bool kvaser_is_usbcan(const struct usb_device_id *id) +{ + return id->idProduct >= USB_USBCAN_REVB_PRODUCT_ID && + id->idProduct <= USB_MEMORATOR_PRODUCT_ID; +} + +static inline bool kvaser_is_hydra(const struct usb_device_id *id) +{ + return id->idProduct >= USB_BLACKBIRD_V2_PRODUCT_ID && + id->idProduct <= USB_HYBRID_PRO_CANLIN_PRODUCT_ID; +} + +static const struct usb_device_id kvaser_usb_table[] = { + /* Leaf USB product IDs */ + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS | + KVASER_USB_HAS_SILENT_MODE }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_HS_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LIGHT_HS_V2_OEM_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_2HS_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_2HS_PRODUCT_ID) }, + + /* USBCANII USB product IDs */ + { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN2_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_REVB_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMORATOR_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_VCI2_PRODUCT_ID), + .driver_info = KVASER_USB_HAS_TXRX_ERRORS }, + + /* Minihydra USB product IDs */ + { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_5HS_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5HS_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_LIGHT_4HS_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_HS_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_2HS_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_2HS_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO_PRO_2HS_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_CANLIN_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_USBCAN_PRO_2HS_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_ATI_MEMO_PRO_2HS_V2_PRODUCT_ID) }, + { USB_DEVICE(KVASER_VENDOR_ID, USB_HYBRID_PRO_CANLIN_PRODUCT_ID) }, + { } +}; +MODULE_DEVICE_TABLE(usb, kvaser_usb_table); + +int kvaser_usb_send_cmd(const struct kvaser_usb *dev, void *cmd, int len) +{ + int actual_len; /* Not used */ + + return usb_bulk_msg(dev->udev, + usb_sndbulkpipe(dev->udev, + dev->bulk_out->bEndpointAddress), + cmd, len, &actual_len, KVASER_USB_TIMEOUT); +} + +int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, + int *actual_len) +{ + return usb_bulk_msg(dev->udev, + usb_rcvbulkpipe(dev->udev, + dev->bulk_in->bEndpointAddress), + cmd, len, actual_len, KVASER_USB_TIMEOUT); +} + +static void kvaser_usb_send_cmd_callback(struct urb *urb) +{ + struct net_device *netdev = urb->context; + + kfree(urb->transfer_buffer); + + if (urb->status) + netdev_warn(netdev, "urb status received: %d\n", urb->status); +} + +int kvaser_usb_send_cmd_async(struct kvaser_usb_net_priv *priv, void *cmd, + int len) +{ + struct kvaser_usb *dev = priv->dev; + struct net_device *netdev = priv->netdev; + struct urb *urb; + int err; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) + return -ENOMEM; + + usb_fill_bulk_urb(urb, dev->udev, + usb_sndbulkpipe(dev->udev, + dev->bulk_out->bEndpointAddress), + cmd, len, kvaser_usb_send_cmd_callback, netdev); + usb_anchor_urb(urb, &priv->tx_submitted); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + netdev_err(netdev, "Error transmitting URB\n"); + usb_unanchor_urb(urb); + } + usb_free_urb(urb); + + return 0; +} + +int kvaser_usb_can_rx_over_error(struct net_device *netdev) +{ + struct net_device_stats *stats = &netdev->stats; + struct can_frame *cf; + struct sk_buff *skb; + + stats->rx_over_errors++; + stats->rx_errors++; + + skb = alloc_can_err_skb(netdev, &cf); + if (!skb) { + stats->rx_dropped++; + netdev_warn(netdev, "No memory left for err_skb\n"); + return -ENOMEM; + } + + cf->can_id |= CAN_ERR_CRTL; + cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); + + return 0; +} + +static void kvaser_usb_read_bulk_callback(struct urb *urb) +{ + struct kvaser_usb *dev = urb->context; + int err; + unsigned int i; + + switch (urb->status) { + case 0: + break; + case -ENOENT: + case -EPIPE: + case -EPROTO: + case -ESHUTDOWN: + return; + default: + dev_info(&dev->intf->dev, "Rx URB aborted (%d)\n", urb->status); + goto resubmit_urb; + } + + dev->ops->dev_read_bulk_callback(dev, urb->transfer_buffer, + urb->actual_length); + +resubmit_urb: + usb_fill_bulk_urb(urb, dev->udev, + usb_rcvbulkpipe(dev->udev, + dev->bulk_in->bEndpointAddress), + urb->transfer_buffer, KVASER_USB_RX_BUFFER_SIZE, + kvaser_usb_read_bulk_callback, dev); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err == -ENODEV) { + for (i = 0; i < dev->nchannels; i++) { + if (!dev->nets[i]) + continue; + + netif_device_detach(dev->nets[i]->netdev); + } + } else if (err) { + dev_err(&dev->intf->dev, + "Failed resubmitting read bulk urb: %d\n", err); + } +} + +static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev) +{ + int i, err = 0; + + if (dev->rxinitdone) + return 0; + + for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) { + struct urb *urb = NULL; + u8 *buf = NULL; + dma_addr_t buf_dma; + + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) { + err = -ENOMEM; + break; + } + + buf = usb_alloc_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, + GFP_KERNEL, &buf_dma); + if (!buf) { + dev_warn(&dev->intf->dev, + "No memory left for USB buffer\n"); + usb_free_urb(urb); + err = -ENOMEM; + break; + } + + usb_fill_bulk_urb(urb, dev->udev, + usb_rcvbulkpipe + (dev->udev, + dev->bulk_in->bEndpointAddress), + buf, KVASER_USB_RX_BUFFER_SIZE, + kvaser_usb_read_bulk_callback, dev); + urb->transfer_dma = buf_dma; + urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + usb_anchor_urb(urb, &dev->rx_submitted); + + err = usb_submit_urb(urb, GFP_KERNEL); + if (err) { + usb_unanchor_urb(urb); + usb_free_coherent(dev->udev, + KVASER_USB_RX_BUFFER_SIZE, buf, + buf_dma); + usb_free_urb(urb); + break; + } + + dev->rxbuf[i] = buf; + dev->rxbuf_dma[i] = buf_dma; + + usb_free_urb(urb); + } + + if (i == 0) { + dev_warn(&dev->intf->dev, "Cannot setup read URBs, error %d\n", + err); + return err; + } else if (i < KVASER_USB_MAX_RX_URBS) { + dev_warn(&dev->intf->dev, "RX performances may be slow\n"); + } + + dev->rxinitdone = true; + + return 0; +} + +static int kvaser_usb_open(struct net_device *netdev) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + struct kvaser_usb *dev = priv->dev; + int err; + + err = open_candev(netdev); + if (err) + return err; + + err = kvaser_usb_setup_rx_urbs(dev); + if (err) + goto error; + + err = dev->ops->dev_set_opt_mode(priv); + if (err) + goto error; + + err = dev->ops->dev_start_chip(priv); + if (err) { + netdev_warn(netdev, "Cannot start device, error %d\n", err); + goto error; + } + + priv->can.state = CAN_STATE_ERROR_ACTIVE; + + return 0; + +error: + close_candev(netdev); + return err; +} + +static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) +{ + int i, max_tx_urbs; + + max_tx_urbs = priv->dev->max_tx_urbs; + + priv->active_tx_contexts = 0; + for (i = 0; i < max_tx_urbs; i++) + priv->tx_contexts[i].echo_index = max_tx_urbs; +} + +/* This method might sleep. Do not call it in the atomic context + * of URB completions. + */ +static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) +{ + usb_kill_anchored_urbs(&priv->tx_submitted); + kvaser_usb_reset_tx_urb_contexts(priv); +} + +static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev) +{ + int i; + + usb_kill_anchored_urbs(&dev->rx_submitted); + + for (i = 0; i < KVASER_USB_MAX_RX_URBS; i++) + usb_free_coherent(dev->udev, KVASER_USB_RX_BUFFER_SIZE, + dev->rxbuf[i], dev->rxbuf_dma[i]); + + for (i = 0; i < dev->nchannels; i++) { + struct kvaser_usb_net_priv *priv = dev->nets[i]; + + if (priv) + kvaser_usb_unlink_tx_urbs(priv); + } +} + +static int kvaser_usb_close(struct net_device *netdev) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + struct kvaser_usb *dev = priv->dev; + int err; + + netif_stop_queue(netdev); + + err = dev->ops->dev_flush_queue(priv); + if (err) + netdev_warn(netdev, "Cannot flush queue, error %d\n", err); + + if (dev->ops->dev_reset_chip) { + err = dev->ops->dev_reset_chip(dev, priv->channel); + if (err) + netdev_warn(netdev, "Cannot reset card, error %d\n", + err); + } + + err = dev->ops->dev_stop_chip(priv); + if (err) + netdev_warn(netdev, "Cannot stop device, error %d\n", err); + + /* reset tx contexts */ + kvaser_usb_unlink_tx_urbs(priv); + + priv->can.state = CAN_STATE_STOPPED; + close_candev(priv->netdev); + + return 0; +} + +static void kvaser_usb_write_bulk_callback(struct urb *urb) +{ + struct kvaser_usb_tx_urb_context *context = urb->context; + struct kvaser_usb_net_priv *priv; + struct net_device *netdev; + + if (WARN_ON(!context)) + return; + + priv = context->priv; + netdev = priv->netdev; + + kfree(urb->transfer_buffer); + + if (!netif_device_present(netdev)) + return; + + if (urb->status) + netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); +} + +static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, + struct net_device *netdev) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + struct kvaser_usb *dev = priv->dev; + struct net_device_stats *stats = &netdev->stats; + struct kvaser_usb_tx_urb_context *context = NULL; + struct urb *urb; + void *buf; + int cmd_len = 0; + int err, ret = NETDEV_TX_OK; + unsigned int i; + unsigned long flags; + + if (can_dropped_invalid_skb(netdev, skb)) + return NETDEV_TX_OK; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + stats->tx_dropped++; + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + spin_lock_irqsave(&priv->tx_contexts_lock, flags); + for (i = 0; i < dev->max_tx_urbs; i++) { + if (priv->tx_contexts[i].echo_index == dev->max_tx_urbs) { + context = &priv->tx_contexts[i]; + + context->echo_index = i; + can_put_echo_skb(skb, netdev, context->echo_index); + ++priv->active_tx_contexts; + if (priv->active_tx_contexts >= (int)dev->max_tx_urbs) + netif_stop_queue(netdev); + + break; + } + } + spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); + + /* This should never happen; it implies a flow control bug */ + if (!context) { + netdev_warn(netdev, "cannot find free context\n"); + + ret = NETDEV_TX_BUSY; + goto freeurb; + } + + buf = dev->ops->dev_frame_to_cmd(priv, skb, &context->dlc, &cmd_len, + context->echo_index); + if (!buf) { + stats->tx_dropped++; + dev_kfree_skb(skb); + spin_lock_irqsave(&priv->tx_contexts_lock, flags); + + can_free_echo_skb(netdev, context->echo_index); + context->echo_index = dev->max_tx_urbs; + --priv->active_tx_contexts; + netif_wake_queue(netdev); + + spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); + goto freeurb; + } + + context->priv = priv; + + usb_fill_bulk_urb(urb, dev->udev, + usb_sndbulkpipe(dev->udev, + dev->bulk_out->bEndpointAddress), + buf, cmd_len, kvaser_usb_write_bulk_callback, + context); + usb_anchor_urb(urb, &priv->tx_submitted); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (unlikely(err)) { + spin_lock_irqsave(&priv->tx_contexts_lock, flags); + + can_free_echo_skb(netdev, context->echo_index); + context->echo_index = dev->max_tx_urbs; + --priv->active_tx_contexts; + netif_wake_queue(netdev); + + spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); + + usb_unanchor_urb(urb); + kfree(buf); + + stats->tx_dropped++; + + if (err == -ENODEV) + netif_device_detach(netdev); + else + netdev_warn(netdev, "Failed tx_urb %d\n", err); + + goto freeurb; + } + + ret = NETDEV_TX_OK; + +freeurb: + usb_free_urb(urb); + return ret; +} + +static const struct net_device_ops kvaser_usb_netdev_ops = { + .ndo_open = kvaser_usb_open, + .ndo_stop = kvaser_usb_close, + .ndo_start_xmit = kvaser_usb_start_xmit, + .ndo_change_mtu = can_change_mtu, +}; + +static void kvaser_usb_remove_interfaces(struct kvaser_usb *dev) +{ + int i; + + for (i = 0; i < dev->nchannels; i++) { + if (!dev->nets[i]) + continue; + + unregister_candev(dev->nets[i]->netdev); + } + + kvaser_usb_unlink_all_urbs(dev); + + for (i = 0; i < dev->nchannels; i++) { + if (!dev->nets[i]) + continue; + + free_candev(dev->nets[i]->netdev); + } +} + +static int kvaser_usb_init_one(struct kvaser_usb *dev, + const struct usb_device_id *id, int channel) +{ + struct net_device *netdev; + struct kvaser_usb_net_priv *priv; + int err; + + if (dev->ops->dev_reset_chip) { + err = dev->ops->dev_reset_chip(dev, channel); + if (err) + return err; + } + + netdev = alloc_candev(sizeof(*priv) + + dev->max_tx_urbs * sizeof(*priv->tx_contexts), + dev->max_tx_urbs); + if (!netdev) { + dev_err(&dev->intf->dev, "Cannot alloc candev\n"); + return -ENOMEM; + } + + priv = netdev_priv(netdev); + + init_usb_anchor(&priv->tx_submitted); + init_completion(&priv->start_comp); + init_completion(&priv->stop_comp); + priv->can.ctrlmode_supported = 0; + + priv->dev = dev; + priv->netdev = netdev; + priv->channel = channel; + + spin_lock_init(&priv->tx_contexts_lock); + kvaser_usb_reset_tx_urb_contexts(priv); + + priv->can.state = CAN_STATE_STOPPED; + priv->can.clock.freq = dev->cfg->clock.freq; + priv->can.bittiming_const = dev->cfg->bittiming_const; + priv->can.do_set_bittiming = dev->ops->dev_set_bittiming; + priv->can.do_set_mode = dev->ops->dev_set_mode; + if ((id->driver_info & KVASER_USB_HAS_TXRX_ERRORS) || + (priv->dev->card_data.capabilities & KVASER_USB_CAP_BERR_CAP)) + priv->can.do_get_berr_counter = dev->ops->dev_get_berr_counter; + if (id->driver_info & KVASER_USB_HAS_SILENT_MODE) + priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; + + priv->can.ctrlmode_supported |= dev->card_data.ctrlmode_supported; + + if (priv->can.ctrlmode_supported & CAN_CTRLMODE_FD) { + priv->can.data_bittiming_const = dev->cfg->data_bittiming_const; + priv->can.do_set_data_bittiming = + dev->ops->dev_set_data_bittiming; + } + + netdev->flags |= IFF_ECHO; + + netdev->netdev_ops = &kvaser_usb_netdev_ops; + + SET_NETDEV_DEV(netdev, &dev->intf->dev); + netdev->dev_id = channel; + + dev->nets[channel] = priv; + + err = register_candev(netdev); + if (err) { + dev_err(&dev->intf->dev, "Failed to register CAN device\n"); + free_candev(netdev); + dev->nets[channel] = NULL; + return err; + } + + netdev_dbg(netdev, "device registered\n"); + + return 0; +} + +static int kvaser_usb_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct kvaser_usb *dev; + int err; + int i; + + dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + if (kvaser_is_leaf(id)) { + dev->card_data.leaf.family = KVASER_LEAF; + dev->ops = &kvaser_usb_leaf_dev_ops; + } else if (kvaser_is_usbcan(id)) { + dev->card_data.leaf.family = KVASER_USBCAN; + dev->ops = &kvaser_usb_leaf_dev_ops; + } else if (kvaser_is_hydra(id)) { + dev->ops = &kvaser_usb_hydra_dev_ops; + } else { + dev_err(&intf->dev, + "Product ID (%d) is not a supported Kvaser USB device\n", + id->idProduct); + return -ENODEV; + } + + dev->intf = intf; + + err = dev->ops->dev_setup_endpoints(dev); + if (err) { + dev_err(&intf->dev, "Cannot get usb endpoint(s)"); + return err; + } + + dev->udev = interface_to_usbdev(intf); + + init_usb_anchor(&dev->rx_submitted); + + usb_set_intfdata(intf, dev); + + dev->card_data.ctrlmode_supported = 0; + dev->card_data.capabilities = 0; + err = dev->ops->dev_init_card(dev); + if (err) { + dev_err(&intf->dev, + "Failed to initialize card, error %d\n", err); + return err; + } + + err = dev->ops->dev_get_software_info(dev); + if (err) { + dev_err(&intf->dev, + "Cannot get software info, error %d\n", err); + return err; + } + + if (dev->ops->dev_get_software_details) { + err = dev->ops->dev_get_software_details(dev); + if (err) { + dev_err(&intf->dev, + "Cannot get software details, error %d\n", err); + return err; + } + } + + if (WARN_ON(!dev->cfg)) + return -ENODEV; + + dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n", + ((dev->fw_version >> 24) & 0xff), + ((dev->fw_version >> 16) & 0xff), + (dev->fw_version & 0xffff)); + + dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs); + + err = dev->ops->dev_get_card_info(dev); + if (err) { + dev_err(&intf->dev, "Cannot get card info, error %d\n", err); + return err; + } + + if (dev->ops->dev_get_capabilities) { + err = dev->ops->dev_get_capabilities(dev); + if (err) { + dev_err(&intf->dev, + "Cannot get capabilities, error %d\n", err); + kvaser_usb_remove_interfaces(dev); + return err; + } + } + + for (i = 0; i < dev->nchannels; i++) { + err = kvaser_usb_init_one(dev, id, i); + if (err) { + kvaser_usb_remove_interfaces(dev); + return err; + } + } + + return 0; +} + +static void kvaser_usb_disconnect(struct usb_interface *intf) +{ + struct kvaser_usb *dev = usb_get_intfdata(intf); + + usb_set_intfdata(intf, NULL); + + if (!dev) + return; + + kvaser_usb_remove_interfaces(dev); +} + +static struct usb_driver kvaser_usb_driver = { + .name = "kvaser_usb", + .probe = kvaser_usb_probe, + .disconnect = kvaser_usb_disconnect, + .id_table = kvaser_usb_table, +}; + +module_usb_driver(kvaser_usb_driver); + +MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>"); +MODULE_AUTHOR("Kvaser AB <support@kvaser.com>"); +MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c new file mode 100644 index 000000000000..c084bae5ec0a --- /dev/null +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c @@ -0,0 +1,2028 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Parts of this driver are based on the following: + * - Kvaser linux mhydra driver (version 5.24) + * - CAN driver for esd CAN-USB/2 + * + * Copyright (C) 2018 KVASER AB, Sweden. All rights reserved. + * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh + * + * Known issues: + * - Transition from CAN_STATE_ERROR_WARNING to CAN_STATE_ERROR_ACTIVE is only + * reported after a call to do_get_berr_counter(), since firmware does not + * distinguish between ERROR_WARNING and ERROR_ACTIVE. + * - Hardware timestamps are not set for CAN Tx frames. + */ + +#include <linux/completion.h> +#include <linux/device.h> +#include <linux/gfp.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/usb.h> + +#include <linux/can.h> +#include <linux/can/dev.h> +#include <linux/can/error.h> +#include <linux/can/netlink.h> + +#include "kvaser_usb.h" + +/* Forward declarations */ +static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan; +static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc; + +#define KVASER_USB_HYDRA_BULK_EP_IN_ADDR 0x82 +#define KVASER_USB_HYDRA_BULK_EP_OUT_ADDR 0x02 + +#define KVASER_USB_HYDRA_MAX_TRANSID 0xff +#define KVASER_USB_HYDRA_MIN_TRANSID 0x01 + +/* Minihydra command IDs */ +#define CMD_SET_BUSPARAMS_REQ 16 +#define CMD_GET_CHIP_STATE_REQ 19 +#define CMD_CHIP_STATE_EVENT 20 +#define CMD_SET_DRIVERMODE_REQ 21 +#define CMD_START_CHIP_REQ 26 +#define CMD_START_CHIP_RESP 27 +#define CMD_STOP_CHIP_REQ 28 +#define CMD_STOP_CHIP_RESP 29 +#define CMD_TX_CAN_MESSAGE 33 +#define CMD_GET_CARD_INFO_REQ 34 +#define CMD_GET_CARD_INFO_RESP 35 +#define CMD_GET_SOFTWARE_INFO_REQ 38 +#define CMD_GET_SOFTWARE_INFO_RESP 39 +#define CMD_ERROR_EVENT 45 +#define CMD_FLUSH_QUEUE 48 +#define CMD_TX_ACKNOWLEDGE 50 +#define CMD_FLUSH_QUEUE_RESP 66 +#define CMD_SET_BUSPARAMS_FD_REQ 69 +#define CMD_SET_BUSPARAMS_FD_RESP 70 +#define CMD_SET_BUSPARAMS_RESP 85 +#define CMD_GET_CAPABILITIES_REQ 95 +#define CMD_GET_CAPABILITIES_RESP 96 +#define CMD_RX_MESSAGE 106 +#define CMD_MAP_CHANNEL_REQ 200 +#define CMD_MAP_CHANNEL_RESP 201 +#define CMD_GET_SOFTWARE_DETAILS_REQ 202 +#define CMD_GET_SOFTWARE_DETAILS_RESP 203 +#define CMD_EXTENDED 255 + +/* Minihydra extended command IDs */ +#define CMD_TX_CAN_MESSAGE_FD 224 +#define CMD_TX_ACKNOWLEDGE_FD 225 +#define CMD_RX_MESSAGE_FD 226 + +/* Hydra commands are handled by different threads in firmware. + * The threads are denoted hydra entity (HE). Each HE got a unique 6-bit + * address. The address is used in hydra commands to get/set source and + * destination HE. There are two predefined HE addresses, the remaining + * addresses are different between devices and firmware versions. Hence, we need + * to enumerate the addresses (see kvaser_usb_hydra_map_channel()). + */ + +/* Well-known HE addresses */ +#define KVASER_USB_HYDRA_HE_ADDRESS_ROUTER 0x00 +#define KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL 0x3e + +#define KVASER_USB_HYDRA_TRANSID_CANHE 0x40 +#define KVASER_USB_HYDRA_TRANSID_SYSDBG 0x61 + +struct kvaser_cmd_map_ch_req { + char name[16]; + u8 channel; + u8 reserved[11]; +} __packed; + +struct kvaser_cmd_map_ch_res { + u8 he_addr; + u8 channel; + u8 reserved[26]; +} __packed; + +struct kvaser_cmd_card_info { + __le32 serial_number; + __le32 clock_res; + __le32 mfg_date; + __le32 ean[2]; + u8 hw_version; + u8 usb_mode; + u8 hw_type; + u8 reserved0; + u8 nchannels; + u8 reserved1[3]; +} __packed; + +struct kvaser_cmd_sw_info { + u8 reserved0[8]; + __le16 max_outstanding_tx; + u8 reserved1[18]; +} __packed; + +struct kvaser_cmd_sw_detail_req { + u8 use_ext_cmd; + u8 reserved[27]; +} __packed; + +/* Software detail flags */ +#define KVASER_USB_HYDRA_SW_FLAG_FW_BETA BIT(2) +#define KVASER_USB_HYDRA_SW_FLAG_FW_BAD BIT(4) +#define KVASER_USB_HYDRA_SW_FLAG_FREQ_80M BIT(5) +#define KVASER_USB_HYDRA_SW_FLAG_EXT_CMD BIT(9) +#define KVASER_USB_HYDRA_SW_FLAG_CANFD BIT(10) +#define KVASER_USB_HYDRA_SW_FLAG_NONISO BIT(11) +#define KVASER_USB_HYDRA_SW_FLAG_EXT_CAP BIT(12) +struct kvaser_cmd_sw_detail_res { + __le32 sw_flags; + __le32 sw_version; + __le32 sw_name; + __le32 ean[2]; + __le32 max_bitrate; + u8 reserved[4]; +} __packed; + +/* Sub commands for cap_req and cap_res */ +#define KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE 0x02 +#define KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT 0x05 +#define KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT 0x06 +struct kvaser_cmd_cap_req { + __le16 cap_cmd; + u8 reserved[26]; +} __packed; + +/* Status codes for cap_res */ +#define KVASER_USB_HYDRA_CAP_STAT_OK 0x00 +#define KVASER_USB_HYDRA_CAP_STAT_NOT_IMPL 0x01 +#define KVASER_USB_HYDRA_CAP_STAT_UNAVAIL 0x02 +struct kvaser_cmd_cap_res { + __le16 cap_cmd; + __le16 status; + __le32 mask; + __le32 value; + u8 reserved[16]; +} __packed; + +/* CMD_ERROR_EVENT error codes */ +#define KVASER_USB_HYDRA_ERROR_EVENT_CAN 0x01 +#define KVASER_USB_HYDRA_ERROR_EVENT_PARAM 0x09 +struct kvaser_cmd_error_event { + __le16 timestamp[3]; + u8 reserved; + u8 error_code; + __le16 info1; + __le16 info2; +} __packed; + +/* Chip state status flags. Used for chip_state_event and err_frame_data. */ +#define KVASER_USB_HYDRA_BUS_ERR_ACT 0x00 +#define KVASER_USB_HYDRA_BUS_ERR_PASS BIT(5) +#define KVASER_USB_HYDRA_BUS_BUS_OFF BIT(6) +struct kvaser_cmd_chip_state_event { + __le16 timestamp[3]; + u8 tx_err_counter; + u8 rx_err_counter; + u8 bus_status; + u8 reserved[19]; +} __packed; + +/* Busparam modes */ +#define KVASER_USB_HYDRA_BUS_MODE_CAN 0x00 +#define KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO 0x01 +#define KVASER_USB_HYDRA_BUS_MODE_NONISO 0x02 +struct kvaser_cmd_set_busparams { + __le32 bitrate; + u8 tseg1; + u8 tseg2; + u8 sjw; + u8 nsamples; + u8 reserved0[4]; + __le32 bitrate_d; + u8 tseg1_d; + u8 tseg2_d; + u8 sjw_d; + u8 nsamples_d; + u8 canfd_mode; + u8 reserved1[7]; +} __packed; + +/* Ctrl modes */ +#define KVASER_USB_HYDRA_CTRLMODE_NORMAL 0x01 +#define KVASER_USB_HYDRA_CTRLMODE_LISTEN 0x02 +struct kvaser_cmd_set_ctrlmode { + u8 mode; + u8 reserved[27]; +} __packed; + +struct kvaser_err_frame_data { + u8 bus_status; + u8 reserved0; + u8 tx_err_counter; + u8 rx_err_counter; + u8 reserved1[4]; +} __packed; + +struct kvaser_cmd_rx_can { + u8 cmd_len; + u8 cmd_no; + u8 channel; + u8 flags; + __le16 timestamp[3]; + u8 dlc; + u8 padding; + __le32 id; + union { + u8 data[8]; + struct kvaser_err_frame_data err_frame_data; + }; +} __packed; + +/* Extended CAN ID flag. Used in rx_can and tx_can */ +#define KVASER_USB_HYDRA_EXTENDED_FRAME_ID BIT(31) +struct kvaser_cmd_tx_can { + __le32 id; + u8 data[8]; + u8 dlc; + u8 flags; + __le16 transid; + u8 channel; + u8 reserved[11]; +} __packed; + +struct kvaser_cmd_header { + u8 cmd_no; + /* The destination HE address is stored in 0..5 of he_addr. + * The upper part of source HE address is stored in 6..7 of he_addr, and + * the lower part is stored in 12..15 of transid. + */ + u8 he_addr; + __le16 transid; +} __packed; + +struct kvaser_cmd { + struct kvaser_cmd_header header; + union { + struct kvaser_cmd_map_ch_req map_ch_req; + struct kvaser_cmd_map_ch_res map_ch_res; + + struct kvaser_cmd_card_info card_info; + struct kvaser_cmd_sw_info sw_info; + struct kvaser_cmd_sw_detail_req sw_detail_req; + struct kvaser_cmd_sw_detail_res sw_detail_res; + + struct kvaser_cmd_cap_req cap_req; + struct kvaser_cmd_cap_res cap_res; + + struct kvaser_cmd_error_event error_event; + + struct kvaser_cmd_set_busparams set_busparams_req; + + struct kvaser_cmd_chip_state_event chip_state_event; + + struct kvaser_cmd_set_ctrlmode set_ctrlmode; + + struct kvaser_cmd_rx_can rx_can; + struct kvaser_cmd_tx_can tx_can; + } __packed; +} __packed; + +/* CAN frame flags. Used in rx_can, ext_rx_can, tx_can and ext_tx_can */ +#define KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME BIT(0) +#define KVASER_USB_HYDRA_CF_FLAG_OVERRUN BIT(1) +#define KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME BIT(4) +#define KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID BIT(5) +/* CAN frame flags. Used in ext_rx_can and ext_tx_can */ +#define KVASER_USB_HYDRA_CF_FLAG_OSM_NACK BIT(12) +#define KVASER_USB_HYDRA_CF_FLAG_ABL BIT(13) +#define KVASER_USB_HYDRA_CF_FLAG_FDF BIT(16) +#define KVASER_USB_HYDRA_CF_FLAG_BRS BIT(17) +#define KVASER_USB_HYDRA_CF_FLAG_ESI BIT(18) + +/* KCAN packet header macros. Used in ext_rx_can and ext_tx_can */ +#define KVASER_USB_KCAN_DATA_DLC_BITS 4 +#define KVASER_USB_KCAN_DATA_DLC_SHIFT 8 +#define KVASER_USB_KCAN_DATA_DLC_MASK \ + GENMASK(KVASER_USB_KCAN_DATA_DLC_BITS - 1 + \ + KVASER_USB_KCAN_DATA_DLC_SHIFT, \ + KVASER_USB_KCAN_DATA_DLC_SHIFT) + +#define KVASER_USB_KCAN_DATA_BRS BIT(14) +#define KVASER_USB_KCAN_DATA_FDF BIT(15) +#define KVASER_USB_KCAN_DATA_OSM BIT(16) +#define KVASER_USB_KCAN_DATA_AREQ BIT(31) +#define KVASER_USB_KCAN_DATA_SRR BIT(31) +#define KVASER_USB_KCAN_DATA_RTR BIT(29) +#define KVASER_USB_KCAN_DATA_IDE BIT(30) +struct kvaser_cmd_ext_rx_can { + __le32 flags; + __le32 id; + __le32 kcan_id; + __le32 kcan_header; + __le64 timestamp; + union { + u8 kcan_payload[64]; + struct kvaser_err_frame_data err_frame_data; + }; +} __packed; + +struct kvaser_cmd_ext_tx_can { + __le32 flags; + __le32 id; + __le32 kcan_id; + __le32 kcan_header; + u8 databytes; + u8 dlc; + u8 reserved[6]; + u8 kcan_payload[64]; +} __packed; + +struct kvaser_cmd_ext_tx_ack { + __le32 flags; + u8 reserved0[4]; + __le64 timestamp; + u8 reserved1[8]; +} __packed; + +/* struct for extended commands (CMD_EXTENDED) */ +struct kvaser_cmd_ext { + struct kvaser_cmd_header header; + __le16 len; + u8 cmd_no_ext; + u8 reserved; + + union { + struct kvaser_cmd_ext_rx_can rx_can; + struct kvaser_cmd_ext_tx_can tx_can; + struct kvaser_cmd_ext_tx_ack tx_ack; + } __packed; +} __packed; + +static const struct can_bittiming_const kvaser_usb_hydra_kcan_bittiming_c = { + .name = "kvaser_usb_kcan", + .tseg1_min = 1, + .tseg1_max = 255, + .tseg2_min = 1, + .tseg2_max = 32, + .sjw_max = 16, + .brp_min = 1, + .brp_max = 4096, + .brp_inc = 1, +}; + +static const struct can_bittiming_const kvaser_usb_hydra_flexc_bittiming_c = { + .name = "kvaser_usb_flex", + .tseg1_min = 4, + .tseg1_max = 16, + .tseg2_min = 2, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 256, + .brp_inc = 1, +}; + +#define KVASER_USB_HYDRA_TRANSID_BITS 12 +#define KVASER_USB_HYDRA_TRANSID_MASK \ + GENMASK(KVASER_USB_HYDRA_TRANSID_BITS - 1, 0) +#define KVASER_USB_HYDRA_HE_ADDR_SRC_MASK GENMASK(7, 6) +#define KVASER_USB_HYDRA_HE_ADDR_DEST_MASK GENMASK(5, 0) +#define KVASER_USB_HYDRA_HE_ADDR_SRC_BITS 2 +static inline u16 kvaser_usb_hydra_get_cmd_transid(const struct kvaser_cmd *cmd) +{ + return le16_to_cpu(cmd->header.transid) & KVASER_USB_HYDRA_TRANSID_MASK; +} + +static inline void kvaser_usb_hydra_set_cmd_transid(struct kvaser_cmd *cmd, + u16 transid) +{ + cmd->header.transid = + cpu_to_le16(transid & KVASER_USB_HYDRA_TRANSID_MASK); +} + +static inline u8 kvaser_usb_hydra_get_cmd_src_he(const struct kvaser_cmd *cmd) +{ + return (cmd->header.he_addr & KVASER_USB_HYDRA_HE_ADDR_SRC_MASK) >> + KVASER_USB_HYDRA_HE_ADDR_SRC_BITS | + le16_to_cpu(cmd->header.transid) >> + KVASER_USB_HYDRA_TRANSID_BITS; +} + +static inline void kvaser_usb_hydra_set_cmd_dest_he(struct kvaser_cmd *cmd, + u8 dest_he) +{ + cmd->header.he_addr = + (cmd->header.he_addr & KVASER_USB_HYDRA_HE_ADDR_SRC_MASK) | + (dest_he & KVASER_USB_HYDRA_HE_ADDR_DEST_MASK); +} + +static u8 kvaser_usb_hydra_channel_from_cmd(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + int i; + u8 channel = 0xff; + u8 src_he = kvaser_usb_hydra_get_cmd_src_he(cmd); + + for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { + if (dev->card_data.hydra.channel_to_he[i] == src_he) { + channel = i; + break; + } + } + + return channel; +} + +static u16 kvaser_usb_hydra_get_next_transid(struct kvaser_usb *dev) +{ + unsigned long flags; + u16 transid; + struct kvaser_usb_dev_card_data_hydra *card_data = + &dev->card_data.hydra; + + spin_lock_irqsave(&card_data->transid_lock, flags); + transid = card_data->transid; + if (transid >= KVASER_USB_HYDRA_MAX_TRANSID) + transid = KVASER_USB_HYDRA_MIN_TRANSID; + else + transid++; + card_data->transid = transid; + spin_unlock_irqrestore(&card_data->transid_lock, flags); + + return transid; +} + +static size_t kvaser_usb_hydra_cmd_size(struct kvaser_cmd *cmd) +{ + size_t ret; + + if (cmd->header.cmd_no == CMD_EXTENDED) + ret = le16_to_cpu(((struct kvaser_cmd_ext *)cmd)->len); + else + ret = sizeof(struct kvaser_cmd); + + return ret; +} + +static struct kvaser_usb_net_priv * +kvaser_usb_hydra_net_priv_from_cmd(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv = NULL; + u8 channel = kvaser_usb_hydra_channel_from_cmd(dev, cmd); + + if (channel >= dev->nchannels) + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", channel); + else + priv = dev->nets[channel]; + + return priv; +} + +static ktime_t +kvaser_usb_hydra_ktime_from_rx_cmd(const struct kvaser_usb_dev_cfg *cfg, + const struct kvaser_cmd *cmd) +{ + u64 ticks; + + if (cmd->header.cmd_no == CMD_EXTENDED) { + struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; + + ticks = le64_to_cpu(cmd_ext->rx_can.timestamp); + } else { + ticks = le16_to_cpu(cmd->rx_can.timestamp[0]); + ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[1])) << 16; + ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[2])) << 32; + } + + return ns_to_ktime(div_u64(ticks * 1000, cfg->timestamp_freq)); +} + +static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev, + u8 cmd_no, int channel) +{ + struct kvaser_cmd *cmd; + int err; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = cmd_no; + if (channel < 0) { + kvaser_usb_hydra_set_cmd_dest_he + (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); + } else { + if (channel >= KVASER_USB_MAX_NET_DEVICES) { + dev_err(&dev->intf->dev, "channel (%d) out of range.\n", + channel); + err = -EINVAL; + goto end; + } + kvaser_usb_hydra_set_cmd_dest_he + (cmd, dev->card_data.hydra.channel_to_he[channel]); + } + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + if (err) + goto end; + +end: + kfree(cmd); + + return err; +} + +static int +kvaser_usb_hydra_send_simple_cmd_async(struct kvaser_usb_net_priv *priv, + u8 cmd_no) +{ + struct kvaser_cmd *cmd; + struct kvaser_usb *dev = priv->dev; + int err; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = cmd_no; + + kvaser_usb_hydra_set_cmd_dest_he + (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + + err = kvaser_usb_send_cmd_async(priv, cmd, + kvaser_usb_hydra_cmd_size(cmd)); + if (err) + kfree(cmd); + + return err; +} + +/* This function is used for synchronously waiting on hydra control commands. + * Note: Compared to kvaser_usb_hydra_read_bulk_callback(), we never need to + * handle partial hydra commands. Since hydra control commands are always + * non-extended commands. + */ +static int kvaser_usb_hydra_wait_cmd(const struct kvaser_usb *dev, u8 cmd_no, + struct kvaser_cmd *cmd) +{ + void *buf; + int err; + unsigned long timeout = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT); + + if (cmd->header.cmd_no == CMD_EXTENDED) { + dev_err(&dev->intf->dev, "Wait for CMD_EXTENDED not allowed\n"); + return -EINVAL; + } + + buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + do { + int actual_len = 0; + int pos = 0; + + err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE, + &actual_len); + if (err < 0) + goto end; + + while (pos < actual_len) { + struct kvaser_cmd *tmp_cmd; + size_t cmd_len; + + tmp_cmd = buf + pos; + cmd_len = kvaser_usb_hydra_cmd_size(tmp_cmd); + if (pos + cmd_len > actual_len) { + dev_err_ratelimited(&dev->intf->dev, + "Format error\n"); + break; + } + + if (tmp_cmd->header.cmd_no == cmd_no) { + memcpy(cmd, tmp_cmd, cmd_len); + goto end; + } + pos += cmd_len; + } + } while (time_before(jiffies, timeout)); + + err = -EINVAL; + +end: + kfree(buf); + + return err; +} + +static int kvaser_usb_hydra_map_channel_resp(struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + u8 he, channel; + u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); + struct kvaser_usb_dev_card_data_hydra *card_data = + &dev->card_data.hydra; + + if (transid > 0x007f || transid < 0x0040) { + dev_err(&dev->intf->dev, + "CMD_MAP_CHANNEL_RESP, invalid transid: 0x%x\n", + transid); + return -EINVAL; + } + + switch (transid) { + case KVASER_USB_HYDRA_TRANSID_CANHE: + case KVASER_USB_HYDRA_TRANSID_CANHE + 1: + case KVASER_USB_HYDRA_TRANSID_CANHE + 2: + case KVASER_USB_HYDRA_TRANSID_CANHE + 3: + case KVASER_USB_HYDRA_TRANSID_CANHE + 4: + channel = transid & 0x000f; + he = cmd->map_ch_res.he_addr; + card_data->channel_to_he[channel] = he; + break; + case KVASER_USB_HYDRA_TRANSID_SYSDBG: + card_data->sysdbg_he = cmd->map_ch_res.he_addr; + break; + default: + dev_warn(&dev->intf->dev, + "Unknown CMD_MAP_CHANNEL_RESP transid=0x%x\n", + transid); + break; + } + + return 0; +} + +static int kvaser_usb_hydra_map_channel(struct kvaser_usb *dev, u16 transid, + u8 channel, const char *name) +{ + struct kvaser_cmd *cmd; + int err; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + strcpy(cmd->map_ch_req.name, name); + cmd->header.cmd_no = CMD_MAP_CHANNEL_REQ; + kvaser_usb_hydra_set_cmd_dest_he + (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ROUTER); + cmd->map_ch_req.channel = channel; + + kvaser_usb_hydra_set_cmd_transid(cmd, transid); + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + if (err) + goto end; + + err = kvaser_usb_hydra_wait_cmd(dev, CMD_MAP_CHANNEL_RESP, cmd); + if (err) + goto end; + + err = kvaser_usb_hydra_map_channel_resp(dev, cmd); + if (err) + goto end; + +end: + kfree(cmd); + + return err; +} + +static int kvaser_usb_hydra_get_single_capability(struct kvaser_usb *dev, + u16 cap_cmd_req, u16 *status) +{ + struct kvaser_usb_dev_card_data *card_data = &dev->card_data; + struct kvaser_cmd *cmd; + u32 value = 0; + u32 mask = 0; + u16 cap_cmd_res; + int err; + int i; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = CMD_GET_CAPABILITIES_REQ; + cmd->cap_req.cap_cmd = cpu_to_le16(cap_cmd_req); + + kvaser_usb_hydra_set_cmd_dest_he(cmd, card_data->hydra.sysdbg_he); + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + if (err) + goto end; + + err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CAPABILITIES_RESP, cmd); + if (err) + goto end; + + *status = le16_to_cpu(cmd->cap_res.status); + + if (*status != KVASER_USB_HYDRA_CAP_STAT_OK) + goto end; + + cap_cmd_res = le16_to_cpu(cmd->cap_res.cap_cmd); + switch (cap_cmd_res) { + case KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE: + case KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT: + case KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT: + value = le32_to_cpu(cmd->cap_res.value); + mask = le32_to_cpu(cmd->cap_res.mask); + break; + default: + dev_warn(&dev->intf->dev, "Unknown capability command %u\n", + cap_cmd_res); + break; + } + + for (i = 0; i < dev->nchannels; i++) { + if (BIT(i) & (value & mask)) { + switch (cap_cmd_res) { + case KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE: + card_data->ctrlmode_supported |= + CAN_CTRLMODE_LISTENONLY; + break; + case KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT: + card_data->capabilities |= + KVASER_USB_CAP_BERR_CAP; + break; + case KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT: + card_data->ctrlmode_supported |= + CAN_CTRLMODE_ONE_SHOT; + break; + } + } + } + +end: + kfree(cmd); + + return err; +} + +static void kvaser_usb_hydra_start_chip_reply(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); + if (!priv) + return; + + if (completion_done(&priv->start_comp) && + netif_queue_stopped(priv->netdev)) { + netif_wake_queue(priv->netdev); + } else { + netif_start_queue(priv->netdev); + complete(&priv->start_comp); + } +} + +static void kvaser_usb_hydra_stop_chip_reply(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); + if (!priv) + return; + + complete(&priv->stop_comp); +} + +static void kvaser_usb_hydra_flush_queue_reply(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); + if (!priv) + return; + + complete(&priv->flush_comp); +} + +static void +kvaser_usb_hydra_bus_status_to_can_state(const struct kvaser_usb_net_priv *priv, + u8 bus_status, + const struct can_berr_counter *bec, + enum can_state *new_state) +{ + if (bus_status & KVASER_USB_HYDRA_BUS_BUS_OFF) { + *new_state = CAN_STATE_BUS_OFF; + } else if (bus_status & KVASER_USB_HYDRA_BUS_ERR_PASS) { + *new_state = CAN_STATE_ERROR_PASSIVE; + } else if (bus_status == KVASER_USB_HYDRA_BUS_ERR_ACT) { + if (bec->txerr >= 128 || bec->rxerr >= 128) { + netdev_warn(priv->netdev, + "ERR_ACTIVE but err tx=%u or rx=%u >=128\n", + bec->txerr, bec->rxerr); + *new_state = CAN_STATE_ERROR_PASSIVE; + } else if (bec->txerr >= 96 || bec->rxerr >= 96) { + *new_state = CAN_STATE_ERROR_WARNING; + } else { + *new_state = CAN_STATE_ERROR_ACTIVE; + } + } +} + +static void kvaser_usb_hydra_update_state(struct kvaser_usb_net_priv *priv, + u8 bus_status, + const struct can_berr_counter *bec) +{ + struct net_device *netdev = priv->netdev; + struct can_frame *cf; + struct sk_buff *skb; + struct net_device_stats *stats; + enum can_state new_state, old_state; + + old_state = priv->can.state; + + kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, bec, + &new_state); + + if (new_state == old_state) + return; + + /* Ignore state change if previous state was STOPPED and the new state + * is BUS_OFF. Firmware always report this as BUS_OFF, since firmware + * does not distinguish between BUS_OFF and STOPPED. + */ + if (old_state == CAN_STATE_STOPPED && new_state == CAN_STATE_BUS_OFF) + return; + + skb = alloc_can_err_skb(netdev, &cf); + if (skb) { + enum can_state tx_state, rx_state; + + tx_state = (bec->txerr >= bec->rxerr) ? + new_state : CAN_STATE_ERROR_ACTIVE; + rx_state = (bec->txerr <= bec->rxerr) ? + new_state : CAN_STATE_ERROR_ACTIVE; + can_change_state(netdev, cf, tx_state, rx_state); + } + + if (new_state == CAN_STATE_BUS_OFF && old_state < CAN_STATE_BUS_OFF) { + if (!priv->can.restart_ms) + kvaser_usb_hydra_send_simple_cmd_async + (priv, CMD_STOP_CHIP_REQ); + + can_bus_off(netdev); + } + + if (!skb) { + netdev_warn(netdev, "No memory left for err_skb\n"); + return; + } + + if (priv->can.restart_ms && + old_state >= CAN_STATE_BUS_OFF && + new_state < CAN_STATE_BUS_OFF) + priv->can.can_stats.restarts++; + + cf->data[6] = bec->txerr; + cf->data[7] = bec->rxerr; + + stats = &netdev->stats; + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); +} + +static void kvaser_usb_hydra_state_event(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + struct can_berr_counter bec; + u8 bus_status; + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); + if (!priv) + return; + + bus_status = cmd->chip_state_event.bus_status; + bec.txerr = cmd->chip_state_event.tx_err_counter; + bec.rxerr = cmd->chip_state_event.rx_err_counter; + + kvaser_usb_hydra_update_state(priv, bus_status, &bec); + priv->bec.txerr = bec.txerr; + priv->bec.rxerr = bec.rxerr; +} + +static void kvaser_usb_hydra_error_event_parameter(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + /* info1 will contain the offending cmd_no */ + switch (le16_to_cpu(cmd->error_event.info1)) { + case CMD_START_CHIP_REQ: + dev_warn(&dev->intf->dev, + "CMD_START_CHIP_REQ error in parameter\n"); + break; + + case CMD_STOP_CHIP_REQ: + dev_warn(&dev->intf->dev, + "CMD_STOP_CHIP_REQ error in parameter\n"); + break; + + case CMD_FLUSH_QUEUE: + dev_warn(&dev->intf->dev, + "CMD_FLUSH_QUEUE error in parameter\n"); + break; + + case CMD_SET_BUSPARAMS_REQ: + dev_warn(&dev->intf->dev, + "Set bittiming failed. Error in parameter\n"); + break; + + case CMD_SET_BUSPARAMS_FD_REQ: + dev_warn(&dev->intf->dev, + "Set data bittiming failed. Error in parameter\n"); + break; + + default: + dev_warn(&dev->intf->dev, + "Unhandled parameter error event cmd_no (%u)\n", + le16_to_cpu(cmd->error_event.info1)); + break; + } +} + +static void kvaser_usb_hydra_error_event(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + switch (cmd->error_event.error_code) { + case KVASER_USB_HYDRA_ERROR_EVENT_PARAM: + kvaser_usb_hydra_error_event_parameter(dev, cmd); + break; + + case KVASER_USB_HYDRA_ERROR_EVENT_CAN: + /* Wrong channel mapping?! This should never happen! + * info1 will contain the offending cmd_no + */ + dev_err(&dev->intf->dev, + "Received CAN error event for cmd_no (%u)\n", + le16_to_cpu(cmd->error_event.info1)); + break; + + default: + dev_warn(&dev->intf->dev, + "Unhandled error event (%d)\n", + cmd->error_event.error_code); + break; + } +} + +static void +kvaser_usb_hydra_error_frame(struct kvaser_usb_net_priv *priv, + const struct kvaser_err_frame_data *err_frame_data, + ktime_t hwtstamp) +{ + struct net_device *netdev = priv->netdev; + struct net_device_stats *stats = &netdev->stats; + struct can_frame *cf; + struct sk_buff *skb; + struct skb_shared_hwtstamps *shhwtstamps; + struct can_berr_counter bec; + enum can_state new_state, old_state; + u8 bus_status; + + priv->can.can_stats.bus_error++; + stats->rx_errors++; + + bus_status = err_frame_data->bus_status; + bec.txerr = err_frame_data->tx_err_counter; + bec.rxerr = err_frame_data->rx_err_counter; + + old_state = priv->can.state; + kvaser_usb_hydra_bus_status_to_can_state(priv, bus_status, &bec, + &new_state); + + skb = alloc_can_err_skb(netdev, &cf); + + if (new_state != old_state) { + if (skb) { + enum can_state tx_state, rx_state; + + tx_state = (bec.txerr >= bec.rxerr) ? + new_state : CAN_STATE_ERROR_ACTIVE; + rx_state = (bec.txerr <= bec.rxerr) ? + new_state : CAN_STATE_ERROR_ACTIVE; + + can_change_state(netdev, cf, tx_state, rx_state); + } + + if (new_state == CAN_STATE_BUS_OFF) { + if (!priv->can.restart_ms) + kvaser_usb_hydra_send_simple_cmd_async + (priv, CMD_STOP_CHIP_REQ); + + can_bus_off(netdev); + } + + if (priv->can.restart_ms && + old_state >= CAN_STATE_BUS_OFF && + new_state < CAN_STATE_BUS_OFF) + cf->can_id |= CAN_ERR_RESTARTED; + } + + if (!skb) { + stats->rx_dropped++; + netdev_warn(netdev, "No memory left for err_skb\n"); + return; + } + + shhwtstamps = skb_hwtstamps(skb); + shhwtstamps->hwtstamp = hwtstamp; + + cf->can_id |= CAN_ERR_BUSERROR; + cf->data[6] = bec.txerr; + cf->data[7] = bec.rxerr; + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); + + priv->bec.txerr = bec.txerr; + priv->bec.rxerr = bec.rxerr; +} + +static void kvaser_usb_hydra_one_shot_fail(struct kvaser_usb_net_priv *priv, + const struct kvaser_cmd_ext *cmd) +{ + struct net_device *netdev = priv->netdev; + struct net_device_stats *stats = &netdev->stats; + struct can_frame *cf; + struct sk_buff *skb; + u32 flags; + + skb = alloc_can_err_skb(netdev, &cf); + if (!skb) { + stats->rx_dropped++; + netdev_warn(netdev, "No memory left for err_skb\n"); + return; + } + + cf->can_id |= CAN_ERR_BUSERROR; + flags = le32_to_cpu(cmd->tx_ack.flags); + + if (flags & KVASER_USB_HYDRA_CF_FLAG_OSM_NACK) + cf->can_id |= CAN_ERR_ACK; + if (flags & KVASER_USB_HYDRA_CF_FLAG_ABL) { + cf->can_id |= CAN_ERR_LOSTARB; + priv->can.can_stats.arbitration_lost++; + } + + stats->tx_errors++; + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); +} + +static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_tx_urb_context *context; + struct kvaser_usb_net_priv *priv; + unsigned long irq_flags; + bool one_shot_fail = false; + u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); + if (!priv) + return; + + if (!netif_device_present(priv->netdev)) + return; + + if (cmd->header.cmd_no == CMD_EXTENDED) { + struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd; + u32 flags = le32_to_cpu(cmd_ext->tx_ack.flags); + + if (flags & (KVASER_USB_HYDRA_CF_FLAG_OSM_NACK | + KVASER_USB_HYDRA_CF_FLAG_ABL)) { + kvaser_usb_hydra_one_shot_fail(priv, cmd_ext); + one_shot_fail = true; + } + } + + context = &priv->tx_contexts[transid % dev->max_tx_urbs]; + if (!one_shot_fail) { + struct net_device_stats *stats = &priv->netdev->stats; + + stats->tx_packets++; + stats->tx_bytes += can_dlc2len(context->dlc); + } + + spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags); + + can_get_echo_skb(priv->netdev, context->echo_index); + context->echo_index = dev->max_tx_urbs; + --priv->active_tx_contexts; + netif_wake_queue(priv->netdev); + + spin_unlock_irqrestore(&priv->tx_contexts_lock, irq_flags); +} + +static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv = NULL; + struct can_frame *cf; + struct sk_buff *skb; + struct skb_shared_hwtstamps *shhwtstamps; + struct net_device_stats *stats; + u8 flags; + ktime_t hwtstamp; + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); + if (!priv) + return; + + stats = &priv->netdev->stats; + + flags = cmd->rx_can.flags; + hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, cmd); + + if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { + kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, + hwtstamp); + return; + } + + skb = alloc_can_skb(priv->netdev, &cf); + if (!skb) { + stats->rx_dropped++; + return; + } + + shhwtstamps = skb_hwtstamps(skb); + shhwtstamps->hwtstamp = hwtstamp; + + cf->can_id = le32_to_cpu(cmd->rx_can.id); + + if (cf->can_id & KVASER_USB_HYDRA_EXTENDED_FRAME_ID) { + cf->can_id &= CAN_EFF_MASK; + cf->can_id |= CAN_EFF_FLAG; + } else { + cf->can_id &= CAN_SFF_MASK; + } + + if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) + kvaser_usb_can_rx_over_error(priv->netdev); + + cf->can_dlc = get_can_dlc(cmd->rx_can.dlc); + + if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) + cf->can_id |= CAN_RTR_FLAG; + else + memcpy(cf->data, cmd->rx_can.data, cf->can_dlc); + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); +} + +static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, + const struct kvaser_cmd_ext *cmd) +{ + struct kvaser_cmd *std_cmd = (struct kvaser_cmd *)cmd; + struct kvaser_usb_net_priv *priv; + struct canfd_frame *cf; + struct sk_buff *skb; + struct skb_shared_hwtstamps *shhwtstamps; + struct net_device_stats *stats; + u32 flags; + u8 dlc; + u32 kcan_header; + ktime_t hwtstamp; + + priv = kvaser_usb_hydra_net_priv_from_cmd(dev, std_cmd); + if (!priv) + return; + + stats = &priv->netdev->stats; + + kcan_header = le32_to_cpu(cmd->rx_can.kcan_header); + dlc = (kcan_header & KVASER_USB_KCAN_DATA_DLC_MASK) >> + KVASER_USB_KCAN_DATA_DLC_SHIFT; + + flags = le32_to_cpu(cmd->rx_can.flags); + hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, std_cmd); + + if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) { + kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data, + hwtstamp); + return; + } + + if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) + skb = alloc_canfd_skb(priv->netdev, &cf); + else + skb = alloc_can_skb(priv->netdev, (struct can_frame **)&cf); + + if (!skb) { + stats->rx_dropped++; + return; + } + + shhwtstamps = skb_hwtstamps(skb); + shhwtstamps->hwtstamp = hwtstamp; + + cf->can_id = le32_to_cpu(cmd->rx_can.id); + + if (flags & KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID) { + cf->can_id &= CAN_EFF_MASK; + cf->can_id |= CAN_EFF_FLAG; + } else { + cf->can_id &= CAN_SFF_MASK; + } + + if (flags & KVASER_USB_HYDRA_CF_FLAG_OVERRUN) + kvaser_usb_can_rx_over_error(priv->netdev); + + if (flags & KVASER_USB_HYDRA_CF_FLAG_FDF) { + cf->len = can_dlc2len(get_canfd_dlc(dlc)); + if (flags & KVASER_USB_HYDRA_CF_FLAG_BRS) + cf->flags |= CANFD_BRS; + if (flags & KVASER_USB_HYDRA_CF_FLAG_ESI) + cf->flags |= CANFD_ESI; + } else { + cf->len = get_can_dlc(dlc); + } + + if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) + cf->can_id |= CAN_RTR_FLAG; + else + memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len); + + stats->rx_packets++; + stats->rx_bytes += cf->len; + netif_rx(skb); +} + +static void kvaser_usb_hydra_handle_cmd_std(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + switch (cmd->header.cmd_no) { + case CMD_START_CHIP_RESP: + kvaser_usb_hydra_start_chip_reply(dev, cmd); + break; + + case CMD_STOP_CHIP_RESP: + kvaser_usb_hydra_stop_chip_reply(dev, cmd); + break; + + case CMD_FLUSH_QUEUE_RESP: + kvaser_usb_hydra_flush_queue_reply(dev, cmd); + break; + + case CMD_CHIP_STATE_EVENT: + kvaser_usb_hydra_state_event(dev, cmd); + break; + + case CMD_ERROR_EVENT: + kvaser_usb_hydra_error_event(dev, cmd); + break; + + case CMD_TX_ACKNOWLEDGE: + kvaser_usb_hydra_tx_acknowledge(dev, cmd); + break; + + case CMD_RX_MESSAGE: + kvaser_usb_hydra_rx_msg_std(dev, cmd); + break; + + /* Ignored commands */ + case CMD_SET_BUSPARAMS_RESP: + case CMD_SET_BUSPARAMS_FD_RESP: + break; + + default: + dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", + cmd->header.cmd_no); + break; + } +} + +static void kvaser_usb_hydra_handle_cmd_ext(const struct kvaser_usb *dev, + const struct kvaser_cmd_ext *cmd) +{ + switch (cmd->cmd_no_ext) { + case CMD_TX_ACKNOWLEDGE_FD: + kvaser_usb_hydra_tx_acknowledge(dev, (struct kvaser_cmd *)cmd); + break; + + case CMD_RX_MESSAGE_FD: + kvaser_usb_hydra_rx_msg_ext(dev, cmd); + break; + + default: + dev_warn(&dev->intf->dev, "Unhandled extended command (%d)\n", + cmd->header.cmd_no); + break; + } +} + +static void kvaser_usb_hydra_handle_cmd(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + if (cmd->header.cmd_no == CMD_EXTENDED) + kvaser_usb_hydra_handle_cmd_ext + (dev, (struct kvaser_cmd_ext *)cmd); + else + kvaser_usb_hydra_handle_cmd_std(dev, cmd); +} + +static void * +kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, + const struct sk_buff *skb, int *frame_len, + int *cmd_len, u16 transid) +{ + struct kvaser_usb *dev = priv->dev; + struct kvaser_cmd_ext *cmd; + struct canfd_frame *cf = (struct canfd_frame *)skb->data; + u8 dlc = can_len2dlc(cf->len); + u8 nbr_of_bytes = cf->len; + u32 flags; + u32 id; + u32 kcan_id; + u32 kcan_header; + + *frame_len = nbr_of_bytes; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd_ext), GFP_ATOMIC); + if (!cmd) + return NULL; + + kvaser_usb_hydra_set_cmd_dest_he + ((struct kvaser_cmd *)cmd, + dev->card_data.hydra.channel_to_he[priv->channel]); + kvaser_usb_hydra_set_cmd_transid((struct kvaser_cmd *)cmd, transid); + + cmd->header.cmd_no = CMD_EXTENDED; + cmd->cmd_no_ext = CMD_TX_CAN_MESSAGE_FD; + + *cmd_len = ALIGN(sizeof(struct kvaser_cmd_ext) - + sizeof(cmd->tx_can.kcan_payload) + nbr_of_bytes, + 8); + + cmd->len = cpu_to_le16(*cmd_len); + + cmd->tx_can.databytes = nbr_of_bytes; + cmd->tx_can.dlc = dlc; + + if (cf->can_id & CAN_EFF_FLAG) { + id = cf->can_id & CAN_EFF_MASK; + flags = KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID; + kcan_id = (cf->can_id & CAN_EFF_MASK) | + KVASER_USB_KCAN_DATA_IDE | KVASER_USB_KCAN_DATA_SRR; + } else { + id = cf->can_id & CAN_SFF_MASK; + flags = 0; + kcan_id = cf->can_id & CAN_SFF_MASK; + } + + if (cf->can_id & CAN_ERR_FLAG) + flags |= KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; + + kcan_header = ((dlc << KVASER_USB_KCAN_DATA_DLC_SHIFT) & + KVASER_USB_KCAN_DATA_DLC_MASK) | + KVASER_USB_KCAN_DATA_AREQ | + (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT ? + KVASER_USB_KCAN_DATA_OSM : 0); + + if (can_is_canfd_skb(skb)) { + kcan_header |= KVASER_USB_KCAN_DATA_FDF | + (cf->flags & CANFD_BRS ? + KVASER_USB_KCAN_DATA_BRS : 0); + } else { + if (cf->can_id & CAN_RTR_FLAG) { + kcan_id |= KVASER_USB_KCAN_DATA_RTR; + cmd->tx_can.databytes = 0; + flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; + } + } + + cmd->tx_can.kcan_id = cpu_to_le32(kcan_id); + cmd->tx_can.id = cpu_to_le32(id); + cmd->tx_can.flags = cpu_to_le32(flags); + cmd->tx_can.kcan_header = cpu_to_le32(kcan_header); + + memcpy(cmd->tx_can.kcan_payload, cf->data, nbr_of_bytes); + + return cmd; +} + +static void * +kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, + const struct sk_buff *skb, int *frame_len, + int *cmd_len, u16 transid) +{ + struct kvaser_usb *dev = priv->dev; + struct kvaser_cmd *cmd; + struct can_frame *cf = (struct can_frame *)skb->data; + u32 flags; + u32 id; + + *frame_len = cf->can_dlc; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); + if (!cmd) + return NULL; + + kvaser_usb_hydra_set_cmd_dest_he + (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); + kvaser_usb_hydra_set_cmd_transid(cmd, transid); + + cmd->header.cmd_no = CMD_TX_CAN_MESSAGE; + + *cmd_len = ALIGN(sizeof(struct kvaser_cmd), 8); + + if (cf->can_id & CAN_EFF_FLAG) { + id = (cf->can_id & CAN_EFF_MASK); + id |= KVASER_USB_HYDRA_EXTENDED_FRAME_ID; + } else { + id = cf->can_id & CAN_SFF_MASK; + } + + cmd->tx_can.dlc = cf->can_dlc; + + flags = (cf->can_id & CAN_EFF_FLAG ? + KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID : 0); + + if (cf->can_id & CAN_RTR_FLAG) + flags |= KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME; + + flags |= (cf->can_id & CAN_ERR_FLAG ? + KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME : 0); + + cmd->tx_can.id = cpu_to_le32(id); + cmd->tx_can.flags = flags; + + memcpy(cmd->tx_can.data, cf->data, *frame_len); + + return cmd; +} + +static int kvaser_usb_hydra_set_mode(struct net_device *netdev, + enum can_mode mode) +{ + int err = 0; + + switch (mode) { + case CAN_MODE_START: + /* CAN controller automatically recovers from BUS_OFF */ + break; + default: + err = -EOPNOTSUPP; + } + + return err; +} + +static int kvaser_usb_hydra_set_bittiming(struct net_device *netdev) +{ + struct kvaser_cmd *cmd; + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + struct can_bittiming *bt = &priv->can.bittiming; + struct kvaser_usb *dev = priv->dev; + int tseg1 = bt->prop_seg + bt->phase_seg1; + int tseg2 = bt->phase_seg2; + int sjw = bt->sjw; + int err; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = CMD_SET_BUSPARAMS_REQ; + cmd->set_busparams_req.bitrate = cpu_to_le32(bt->bitrate); + cmd->set_busparams_req.sjw = (u8)sjw; + cmd->set_busparams_req.tseg1 = (u8)tseg1; + cmd->set_busparams_req.tseg2 = (u8)tseg2; + cmd->set_busparams_req.nsamples = 1; + + kvaser_usb_hydra_set_cmd_dest_he + (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + + kfree(cmd); + + return err; +} + +static int kvaser_usb_hydra_set_data_bittiming(struct net_device *netdev) +{ + struct kvaser_cmd *cmd; + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + struct can_bittiming *dbt = &priv->can.data_bittiming; + struct kvaser_usb *dev = priv->dev; + int tseg1 = dbt->prop_seg + dbt->phase_seg1; + int tseg2 = dbt->phase_seg2; + int sjw = dbt->sjw; + int err; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = CMD_SET_BUSPARAMS_FD_REQ; + cmd->set_busparams_req.bitrate_d = cpu_to_le32(dbt->bitrate); + cmd->set_busparams_req.sjw_d = (u8)sjw; + cmd->set_busparams_req.tseg1_d = (u8)tseg1; + cmd->set_busparams_req.tseg2_d = (u8)tseg2; + cmd->set_busparams_req.nsamples_d = 1; + + if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { + if (priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) + cmd->set_busparams_req.canfd_mode = + KVASER_USB_HYDRA_BUS_MODE_NONISO; + else + cmd->set_busparams_req.canfd_mode = + KVASER_USB_HYDRA_BUS_MODE_CANFD_ISO; + } + + kvaser_usb_hydra_set_cmd_dest_he + (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + + kfree(cmd); + + return err; +} + +static int kvaser_usb_hydra_get_berr_counter(const struct net_device *netdev, + struct can_berr_counter *bec) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + int err; + + err = kvaser_usb_hydra_send_simple_cmd(priv->dev, + CMD_GET_CHIP_STATE_REQ, + priv->channel); + if (err) + return err; + + *bec = priv->bec; + + return 0; +} + +static int kvaser_usb_hydra_setup_endpoints(struct kvaser_usb *dev) +{ + const struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *ep; + int i; + + iface_desc = &dev->intf->altsetting[0]; + + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + ep = &iface_desc->endpoint[i].desc; + + if (!dev->bulk_in && usb_endpoint_is_bulk_in(ep) && + ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_IN_ADDR) + dev->bulk_in = ep; + + if (!dev->bulk_out && usb_endpoint_is_bulk_out(ep) && + ep->bEndpointAddress == KVASER_USB_HYDRA_BULK_EP_OUT_ADDR) + dev->bulk_out = ep; + + if (dev->bulk_in && dev->bulk_out) + return 0; + } + + return -ENODEV; +} + +static int kvaser_usb_hydra_init_card(struct kvaser_usb *dev) +{ + int err; + unsigned int i; + struct kvaser_usb_dev_card_data_hydra *card_data = + &dev->card_data.hydra; + + card_data->transid = KVASER_USB_HYDRA_MIN_TRANSID; + spin_lock_init(&card_data->transid_lock); + + memset(card_data->usb_rx_leftover, 0, KVASER_USB_HYDRA_MAX_CMD_LEN); + card_data->usb_rx_leftover_len = 0; + spin_lock_init(&card_data->usb_rx_leftover_lock); + + memset(card_data->channel_to_he, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL, + sizeof(card_data->channel_to_he)); + card_data->sysdbg_he = 0; + + for (i = 0; i < KVASER_USB_MAX_NET_DEVICES; i++) { + err = kvaser_usb_hydra_map_channel + (dev, + (KVASER_USB_HYDRA_TRANSID_CANHE | i), + i, "CAN"); + if (err) { + dev_err(&dev->intf->dev, + "CMD_MAP_CHANNEL_REQ failed for CAN%u\n", i); + return err; + } + } + + err = kvaser_usb_hydra_map_channel(dev, KVASER_USB_HYDRA_TRANSID_SYSDBG, + 0, "SYSDBG"); + if (err) { + dev_err(&dev->intf->dev, + "CMD_MAP_CHANNEL_REQ failed for SYSDBG\n"); + return err; + } + + return 0; +} + +static int kvaser_usb_hydra_get_software_info(struct kvaser_usb *dev) +{ + struct kvaser_cmd cmd; + int err; + + err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO_REQ, + -1); + if (err) + return err; + + memset(&cmd, 0, sizeof(struct kvaser_cmd)); + err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_RESP, &cmd); + if (err) + return err; + + dev->max_tx_urbs = min_t(unsigned int, KVASER_USB_MAX_TX_URBS, + le16_to_cpu(cmd.sw_info.max_outstanding_tx)); + + return 0; +} + +static int kvaser_usb_hydra_get_software_details(struct kvaser_usb *dev) +{ + struct kvaser_cmd *cmd; + int err; + u32 flags; + struct kvaser_usb_dev_card_data *card_data = &dev->card_data; + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = CMD_GET_SOFTWARE_DETAILS_REQ; + cmd->sw_detail_req.use_ext_cmd = 1; + kvaser_usb_hydra_set_cmd_dest_he + (cmd, KVASER_USB_HYDRA_HE_ADDRESS_ILLEGAL); + + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + if (err) + goto end; + + err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_SOFTWARE_DETAILS_RESP, + cmd); + if (err) + goto end; + + dev->fw_version = le32_to_cpu(cmd->sw_detail_res.sw_version); + flags = le32_to_cpu(cmd->sw_detail_res.sw_flags); + + if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BAD) { + dev_err(&dev->intf->dev, + "Bad firmware, device refuse to run!\n"); + err = -EINVAL; + goto end; + } + + if (flags & KVASER_USB_HYDRA_SW_FLAG_FW_BETA) + dev_info(&dev->intf->dev, "Beta firmware in use\n"); + + if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CAP) + card_data->capabilities |= KVASER_USB_CAP_EXT_CAP; + + if (flags & KVASER_USB_HYDRA_SW_FLAG_EXT_CMD) + card_data->capabilities |= KVASER_USB_HYDRA_CAP_EXT_CMD; + + if (flags & KVASER_USB_HYDRA_SW_FLAG_CANFD) + card_data->ctrlmode_supported |= CAN_CTRLMODE_FD; + + if (flags & KVASER_USB_HYDRA_SW_FLAG_NONISO) + card_data->ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO; + + if (flags & KVASER_USB_HYDRA_SW_FLAG_FREQ_80M) + dev->cfg = &kvaser_usb_hydra_dev_cfg_kcan; + else + dev->cfg = &kvaser_usb_hydra_dev_cfg_flexc; + +end: + kfree(cmd); + + return err; +} + +static int kvaser_usb_hydra_get_card_info(struct kvaser_usb *dev) +{ + struct kvaser_cmd cmd; + int err; + + err = kvaser_usb_hydra_send_simple_cmd(dev, CMD_GET_CARD_INFO_REQ, -1); + if (err) + return err; + + memset(&cmd, 0, sizeof(struct kvaser_cmd)); + err = kvaser_usb_hydra_wait_cmd(dev, CMD_GET_CARD_INFO_RESP, &cmd); + if (err) + return err; + + dev->nchannels = cmd.card_info.nchannels; + if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES) + return -EINVAL; + + return 0; +} + +static int kvaser_usb_hydra_get_capabilities(struct kvaser_usb *dev) +{ + int err; + u16 status; + + if (!(dev->card_data.capabilities & KVASER_USB_CAP_EXT_CAP)) { + dev_info(&dev->intf->dev, + "No extended capability support. Upgrade your device.\n"); + return 0; + } + + err = kvaser_usb_hydra_get_single_capability + (dev, + KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE, + &status); + if (err) + return err; + if (status) + dev_info(&dev->intf->dev, + "KVASER_USB_HYDRA_CAP_CMD_LISTEN_MODE failed %u\n", + status); + + err = kvaser_usb_hydra_get_single_capability + (dev, + KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT, + &status); + if (err) + return err; + if (status) + dev_info(&dev->intf->dev, + "KVASER_USB_HYDRA_CAP_CMD_ERR_REPORT failed %u\n", + status); + + err = kvaser_usb_hydra_get_single_capability + (dev, KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT, + &status); + if (err) + return err; + if (status) + dev_info(&dev->intf->dev, + "KVASER_USB_HYDRA_CAP_CMD_ONE_SHOT failed %u\n", + status); + + return 0; +} + +static int kvaser_usb_hydra_set_opt_mode(const struct kvaser_usb_net_priv *priv) +{ + struct kvaser_usb *dev = priv->dev; + struct kvaser_cmd *cmd; + int err; + + if ((priv->can.ctrlmode & + (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)) == + CAN_CTRLMODE_FD_NON_ISO) { + netdev_warn(priv->netdev, + "CTRLMODE_FD shall be on if CTRLMODE_FD_NON_ISO is on\n"); + return -EINVAL; + } + + cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->header.cmd_no = CMD_SET_DRIVERMODE_REQ; + kvaser_usb_hydra_set_cmd_dest_he + (cmd, dev->card_data.hydra.channel_to_he[priv->channel]); + kvaser_usb_hydra_set_cmd_transid + (cmd, kvaser_usb_hydra_get_next_transid(dev)); + if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) + cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_LISTEN; + else + cmd->set_ctrlmode.mode = KVASER_USB_HYDRA_CTRLMODE_NORMAL; + + err = kvaser_usb_send_cmd(dev, cmd, kvaser_usb_hydra_cmd_size(cmd)); + kfree(cmd); + + return err; +} + +static int kvaser_usb_hydra_start_chip(struct kvaser_usb_net_priv *priv) +{ + int err; + + init_completion(&priv->start_comp); + + err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_START_CHIP_REQ, + priv->channel); + if (err) + return err; + + if (!wait_for_completion_timeout(&priv->start_comp, + msecs_to_jiffies(KVASER_USB_TIMEOUT))) + return -ETIMEDOUT; + + return 0; +} + +static int kvaser_usb_hydra_stop_chip(struct kvaser_usb_net_priv *priv) +{ + int err; + + init_completion(&priv->stop_comp); + + /* Make sure we do not report invalid BUS_OFF from CMD_CHIP_STATE_EVENT + * see comment in kvaser_usb_hydra_update_state() + */ + priv->can.state = CAN_STATE_STOPPED; + + err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_STOP_CHIP_REQ, + priv->channel); + if (err) + return err; + + if (!wait_for_completion_timeout(&priv->stop_comp, + msecs_to_jiffies(KVASER_USB_TIMEOUT))) + return -ETIMEDOUT; + + return 0; +} + +static int kvaser_usb_hydra_flush_queue(struct kvaser_usb_net_priv *priv) +{ + int err; + + init_completion(&priv->flush_comp); + + err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_FLUSH_QUEUE, + priv->channel); + if (err) + return err; + + if (!wait_for_completion_timeout(&priv->flush_comp, + msecs_to_jiffies(KVASER_USB_TIMEOUT))) + return -ETIMEDOUT; + + return 0; +} + +/* A single extended hydra command can be transmitted in multiple transfers + * We have to buffer partial hydra commands, and handle them on next callback. + */ +static void kvaser_usb_hydra_read_bulk_callback(struct kvaser_usb *dev, + void *buf, int len) +{ + unsigned long irq_flags; + struct kvaser_cmd *cmd; + int pos = 0; + size_t cmd_len; + struct kvaser_usb_dev_card_data_hydra *card_data = + &dev->card_data.hydra; + int usb_rx_leftover_len; + spinlock_t *usb_rx_leftover_lock = &card_data->usb_rx_leftover_lock; + + spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); + usb_rx_leftover_len = card_data->usb_rx_leftover_len; + if (usb_rx_leftover_len) { + int remaining_bytes; + + cmd = (struct kvaser_cmd *)card_data->usb_rx_leftover; + + cmd_len = kvaser_usb_hydra_cmd_size(cmd); + + remaining_bytes = min_t(unsigned int, len, + cmd_len - usb_rx_leftover_len); + /* Make sure we do not overflow usb_rx_leftover */ + if (remaining_bytes + usb_rx_leftover_len > + KVASER_USB_HYDRA_MAX_CMD_LEN) { + dev_err(&dev->intf->dev, "Format error\n"); + spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); + return; + } + + memcpy(card_data->usb_rx_leftover + usb_rx_leftover_len, buf, + remaining_bytes); + pos += remaining_bytes; + + if (remaining_bytes + usb_rx_leftover_len == cmd_len) { + kvaser_usb_hydra_handle_cmd(dev, cmd); + usb_rx_leftover_len = 0; + } else { + /* Command still not complete */ + usb_rx_leftover_len += remaining_bytes; + } + card_data->usb_rx_leftover_len = usb_rx_leftover_len; + } + spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); + + while (pos < len) { + cmd = buf + pos; + + cmd_len = kvaser_usb_hydra_cmd_size(cmd); + + if (pos + cmd_len > len) { + /* We got first part of a command */ + int leftover_bytes; + + leftover_bytes = len - pos; + /* Make sure we do not overflow usb_rx_leftover */ + if (leftover_bytes > KVASER_USB_HYDRA_MAX_CMD_LEN) { + dev_err(&dev->intf->dev, "Format error\n"); + return; + } + spin_lock_irqsave(usb_rx_leftover_lock, irq_flags); + memcpy(card_data->usb_rx_leftover, buf + pos, + leftover_bytes); + card_data->usb_rx_leftover_len = leftover_bytes; + spin_unlock_irqrestore(usb_rx_leftover_lock, irq_flags); + break; + } + + kvaser_usb_hydra_handle_cmd(dev, cmd); + pos += cmd_len; + } +} + +static void * +kvaser_usb_hydra_frame_to_cmd(const struct kvaser_usb_net_priv *priv, + const struct sk_buff *skb, int *frame_len, + int *cmd_len, u16 transid) +{ + void *buf; + + if (priv->dev->card_data.capabilities & KVASER_USB_HYDRA_CAP_EXT_CMD) + buf = kvaser_usb_hydra_frame_to_cmd_ext(priv, skb, frame_len, + cmd_len, transid); + else + buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, frame_len, + cmd_len, transid); + + return buf; +} + +const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops = { + .dev_set_mode = kvaser_usb_hydra_set_mode, + .dev_set_bittiming = kvaser_usb_hydra_set_bittiming, + .dev_set_data_bittiming = kvaser_usb_hydra_set_data_bittiming, + .dev_get_berr_counter = kvaser_usb_hydra_get_berr_counter, + .dev_setup_endpoints = kvaser_usb_hydra_setup_endpoints, + .dev_init_card = kvaser_usb_hydra_init_card, + .dev_get_software_info = kvaser_usb_hydra_get_software_info, + .dev_get_software_details = kvaser_usb_hydra_get_software_details, + .dev_get_card_info = kvaser_usb_hydra_get_card_info, + .dev_get_capabilities = kvaser_usb_hydra_get_capabilities, + .dev_set_opt_mode = kvaser_usb_hydra_set_opt_mode, + .dev_start_chip = kvaser_usb_hydra_start_chip, + .dev_stop_chip = kvaser_usb_hydra_stop_chip, + .dev_reset_chip = NULL, + .dev_flush_queue = kvaser_usb_hydra_flush_queue, + .dev_read_bulk_callback = kvaser_usb_hydra_read_bulk_callback, + .dev_frame_to_cmd = kvaser_usb_hydra_frame_to_cmd, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan = { + .clock = { + .freq = 80000000, + }, + .timestamp_freq = 80, + .bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, + .data_bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc = { + .clock = { + .freq = 24000000, + }, + .timestamp_freq = 1, + .bittiming_const = &kvaser_usb_hydra_flexc_bittiming_c, +}; diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c new file mode 100644 index 000000000000..07d2f3aa2c02 --- /dev/null +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -0,0 +1,1358 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Parts of this driver are based on the following: + * - Kvaser linux leaf driver (version 4.78) + * - CAN driver for esd CAN-USB/2 + * - Kvaser linux usbcanII driver (version 5.3) + * + * Copyright (C) 2002-2018 KVASER AB, Sweden. All rights reserved. + * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh + * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> + * Copyright (C) 2015 Valeo S.A. + */ + +#include <linux/completion.h> +#include <linux/device.h> +#include <linux/gfp.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/usb.h> + +#include <linux/can.h> +#include <linux/can/dev.h> +#include <linux/can/error.h> +#include <linux/can/netlink.h> + +#include "kvaser_usb.h" + +/* Forward declaration */ +static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg; + +#define CAN_USB_CLOCK 8000000 +#define MAX_USBCAN_NET_DEVICES 2 + +/* Command header size */ +#define CMD_HEADER_LEN 2 + +/* Kvaser CAN message flags */ +#define MSG_FLAG_ERROR_FRAME BIT(0) +#define MSG_FLAG_OVERRUN BIT(1) +#define MSG_FLAG_NERR BIT(2) +#define MSG_FLAG_WAKEUP BIT(3) +#define MSG_FLAG_REMOTE_FRAME BIT(4) +#define MSG_FLAG_RESERVED BIT(5) +#define MSG_FLAG_TX_ACK BIT(6) +#define MSG_FLAG_TX_REQUEST BIT(7) + +/* CAN states (M16C CxSTRH register) */ +#define M16C_STATE_BUS_RESET BIT(0) +#define M16C_STATE_BUS_ERROR BIT(4) +#define M16C_STATE_BUS_PASSIVE BIT(5) +#define M16C_STATE_BUS_OFF BIT(6) + +/* Leaf/usbcan command ids */ +#define CMD_RX_STD_MESSAGE 12 +#define CMD_TX_STD_MESSAGE 13 +#define CMD_RX_EXT_MESSAGE 14 +#define CMD_TX_EXT_MESSAGE 15 +#define CMD_SET_BUS_PARAMS 16 +#define CMD_CHIP_STATE_EVENT 20 +#define CMD_SET_CTRL_MODE 21 +#define CMD_RESET_CHIP 24 +#define CMD_START_CHIP 26 +#define CMD_START_CHIP_REPLY 27 +#define CMD_STOP_CHIP 28 +#define CMD_STOP_CHIP_REPLY 29 + +#define CMD_USBCAN_CLOCK_OVERFLOW_EVENT 33 + +#define CMD_GET_CARD_INFO 34 +#define CMD_GET_CARD_INFO_REPLY 35 +#define CMD_GET_SOFTWARE_INFO 38 +#define CMD_GET_SOFTWARE_INFO_REPLY 39 +#define CMD_FLUSH_QUEUE 48 +#define CMD_TX_ACKNOWLEDGE 50 +#define CMD_CAN_ERROR_EVENT 51 +#define CMD_FLUSH_QUEUE_REPLY 68 + +#define CMD_LEAF_LOG_MESSAGE 106 + +/* error factors */ +#define M16C_EF_ACKE BIT(0) +#define M16C_EF_CRCE BIT(1) +#define M16C_EF_FORME BIT(2) +#define M16C_EF_STFE BIT(3) +#define M16C_EF_BITE0 BIT(4) +#define M16C_EF_BITE1 BIT(5) +#define M16C_EF_RCVE BIT(6) +#define M16C_EF_TRE BIT(7) + +/* Only Leaf-based devices can report M16C error factors, + * thus define our own error status flags for USBCANII + */ +#define USBCAN_ERROR_STATE_NONE 0 +#define USBCAN_ERROR_STATE_TX_ERROR BIT(0) +#define USBCAN_ERROR_STATE_RX_ERROR BIT(1) +#define USBCAN_ERROR_STATE_BUSERROR BIT(2) + +/* bittiming parameters */ +#define KVASER_USB_TSEG1_MIN 1 +#define KVASER_USB_TSEG1_MAX 16 +#define KVASER_USB_TSEG2_MIN 1 +#define KVASER_USB_TSEG2_MAX 8 +#define KVASER_USB_SJW_MAX 4 +#define KVASER_USB_BRP_MIN 1 +#define KVASER_USB_BRP_MAX 64 +#define KVASER_USB_BRP_INC 1 + +/* ctrl modes */ +#define KVASER_CTRL_MODE_NORMAL 1 +#define KVASER_CTRL_MODE_SILENT 2 +#define KVASER_CTRL_MODE_SELFRECEPTION 3 +#define KVASER_CTRL_MODE_OFF 4 + +/* Extended CAN identifier flag */ +#define KVASER_EXTENDED_FRAME BIT(31) + +struct kvaser_cmd_simple { + u8 tid; + u8 channel; +} __packed; + +struct kvaser_cmd_cardinfo { + u8 tid; + u8 nchannels; + __le32 serial_number; + __le32 padding0; + __le32 clock_resolution; + __le32 mfgdate; + u8 ean[8]; + u8 hw_revision; + union { + struct { + u8 usb_hs_mode; + } __packed leaf1; + struct { + u8 padding; + } __packed usbcan1; + } __packed; + __le16 padding1; +} __packed; + +struct leaf_cmd_softinfo { + u8 tid; + u8 padding0; + __le32 sw_options; + __le32 fw_version; + __le16 max_outstanding_tx; + __le16 padding1[9]; +} __packed; + +struct usbcan_cmd_softinfo { + u8 tid; + u8 fw_name[5]; + __le16 max_outstanding_tx; + u8 padding[6]; + __le32 fw_version; + __le16 checksum; + __le16 sw_options; +} __packed; + +struct kvaser_cmd_busparams { + u8 tid; + u8 channel; + __le32 bitrate; + u8 tseg1; + u8 tseg2; + u8 sjw; + u8 no_samp; +} __packed; + +struct kvaser_cmd_tx_can { + u8 channel; + u8 tid; + u8 data[14]; + union { + struct { + u8 padding; + u8 flags; + } __packed leaf; + struct { + u8 flags; + u8 padding; + } __packed usbcan; + } __packed; +} __packed; + +struct kvaser_cmd_rx_can_header { + u8 channel; + u8 flag; +} __packed; + +struct leaf_cmd_rx_can { + u8 channel; + u8 flag; + + __le16 time[3]; + u8 data[14]; +} __packed; + +struct usbcan_cmd_rx_can { + u8 channel; + u8 flag; + + u8 data[14]; + __le16 time; +} __packed; + +struct leaf_cmd_chip_state_event { + u8 tid; + u8 channel; + + __le16 time[3]; + u8 tx_errors_count; + u8 rx_errors_count; + + u8 status; + u8 padding[3]; +} __packed; + +struct usbcan_cmd_chip_state_event { + u8 tid; + u8 channel; + + u8 tx_errors_count; + u8 rx_errors_count; + __le16 time; + + u8 status; + u8 padding[3]; +} __packed; + +struct kvaser_cmd_tx_acknowledge_header { + u8 channel; + u8 tid; +} __packed; + +struct leaf_cmd_error_event { + u8 tid; + u8 flags; + __le16 time[3]; + u8 channel; + u8 padding; + u8 tx_errors_count; + u8 rx_errors_count; + u8 status; + u8 error_factor; +} __packed; + +struct usbcan_cmd_error_event { + u8 tid; + u8 padding; + u8 tx_errors_count_ch0; + u8 rx_errors_count_ch0; + u8 tx_errors_count_ch1; + u8 rx_errors_count_ch1; + u8 status_ch0; + u8 status_ch1; + __le16 time; +} __packed; + +struct kvaser_cmd_ctrl_mode { + u8 tid; + u8 channel; + u8 ctrl_mode; + u8 padding[3]; +} __packed; + +struct kvaser_cmd_flush_queue { + u8 tid; + u8 channel; + u8 flags; + u8 padding[3]; +} __packed; + +struct leaf_cmd_log_message { + u8 channel; + u8 flags; + __le16 time[3]; + u8 dlc; + u8 time_offset; + __le32 id; + u8 data[8]; +} __packed; + +struct kvaser_cmd { + u8 len; + u8 id; + union { + struct kvaser_cmd_simple simple; + struct kvaser_cmd_cardinfo cardinfo; + struct kvaser_cmd_busparams busparams; + + struct kvaser_cmd_rx_can_header rx_can_header; + struct kvaser_cmd_tx_acknowledge_header tx_acknowledge_header; + + union { + struct leaf_cmd_softinfo softinfo; + struct leaf_cmd_rx_can rx_can; + struct leaf_cmd_chip_state_event chip_state_event; + struct leaf_cmd_error_event error_event; + struct leaf_cmd_log_message log_message; + } __packed leaf; + + union { + struct usbcan_cmd_softinfo softinfo; + struct usbcan_cmd_rx_can rx_can; + struct usbcan_cmd_chip_state_event chip_state_event; + struct usbcan_cmd_error_event error_event; + } __packed usbcan; + + struct kvaser_cmd_tx_can tx_can; + struct kvaser_cmd_ctrl_mode ctrl_mode; + struct kvaser_cmd_flush_queue flush_queue; + } u; +} __packed; + +/* Summary of a kvaser error event, for a unified Leaf/Usbcan error + * handling. Some discrepancies between the two families exist: + * + * - USBCAN firmware does not report M16C "error factors" + * - USBCAN controllers has difficulties reporting if the raised error + * event is for ch0 or ch1. They leave such arbitration to the OS + * driver by letting it compare error counters with previous values + * and decide the error event's channel. Thus for USBCAN, the channel + * field is only advisory. + */ +struct kvaser_usb_err_summary { + u8 channel, status, txerr, rxerr; + union { + struct { + u8 error_factor; + } leaf; + struct { + u8 other_ch_status; + u8 error_state; + } usbcan; + }; +}; + +static void * +kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv, + const struct sk_buff *skb, int *frame_len, + int *cmd_len, u16 transid) +{ + struct kvaser_usb *dev = priv->dev; + struct kvaser_cmd *cmd; + u8 *cmd_tx_can_flags = NULL; /* GCC */ + struct can_frame *cf = (struct can_frame *)skb->data; + + *frame_len = cf->can_dlc; + + cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); + if (cmd) { + cmd->u.tx_can.tid = transid & 0xff; + cmd->len = *cmd_len = CMD_HEADER_LEN + + sizeof(struct kvaser_cmd_tx_can); + cmd->u.tx_can.channel = priv->channel; + + switch (dev->card_data.leaf.family) { + case KVASER_LEAF: + cmd_tx_can_flags = &cmd->u.tx_can.leaf.flags; + break; + case KVASER_USBCAN: + cmd_tx_can_flags = &cmd->u.tx_can.usbcan.flags; + break; + } + + *cmd_tx_can_flags = 0; + + if (cf->can_id & CAN_EFF_FLAG) { + cmd->id = CMD_TX_EXT_MESSAGE; + cmd->u.tx_can.data[0] = (cf->can_id >> 24) & 0x1f; + cmd->u.tx_can.data[1] = (cf->can_id >> 18) & 0x3f; + cmd->u.tx_can.data[2] = (cf->can_id >> 14) & 0x0f; + cmd->u.tx_can.data[3] = (cf->can_id >> 6) & 0xff; + cmd->u.tx_can.data[4] = cf->can_id & 0x3f; + } else { + cmd->id = CMD_TX_STD_MESSAGE; + cmd->u.tx_can.data[0] = (cf->can_id >> 6) & 0x1f; + cmd->u.tx_can.data[1] = cf->can_id & 0x3f; + } + + cmd->u.tx_can.data[5] = cf->can_dlc; + memcpy(&cmd->u.tx_can.data[6], cf->data, cf->can_dlc); + + if (cf->can_id & CAN_RTR_FLAG) + *cmd_tx_can_flags |= MSG_FLAG_REMOTE_FRAME; + } + return cmd; +} + +static int kvaser_usb_leaf_wait_cmd(const struct kvaser_usb *dev, u8 id, + struct kvaser_cmd *cmd) +{ + struct kvaser_cmd *tmp; + void *buf; + int actual_len; + int err; + int pos; + unsigned long to = jiffies + msecs_to_jiffies(KVASER_USB_TIMEOUT); + + buf = kzalloc(KVASER_USB_RX_BUFFER_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + do { + err = kvaser_usb_recv_cmd(dev, buf, KVASER_USB_RX_BUFFER_SIZE, + &actual_len); + if (err < 0) + goto end; + + pos = 0; + while (pos <= actual_len - CMD_HEADER_LEN) { + tmp = buf + pos; + + /* Handle commands crossing the USB endpoint max packet + * size boundary. Check kvaser_usb_read_bulk_callback() + * for further details. + */ + if (tmp->len == 0) { + pos = round_up(pos, + le16_to_cpu + (dev->bulk_in->wMaxPacketSize)); + continue; + } + + if (pos + tmp->len > actual_len) { + dev_err_ratelimited(&dev->intf->dev, + "Format error\n"); + break; + } + + if (tmp->id == id) { + memcpy(cmd, tmp, tmp->len); + goto end; + } + + pos += tmp->len; + } + } while (time_before(jiffies, to)); + + err = -EINVAL; + +end: + kfree(buf); + + return err; +} + +static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev, + u8 cmd_id, int channel) +{ + struct kvaser_cmd *cmd; + int rc; + + cmd = kmalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->id = cmd_id; + cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple); + cmd->u.simple.channel = channel; + cmd->u.simple.tid = 0xff; + + rc = kvaser_usb_send_cmd(dev, cmd, cmd->len); + + kfree(cmd); + return rc; +} + +static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev) +{ + struct kvaser_cmd cmd; + int err; + + err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_SOFTWARE_INFO, 0); + if (err) + return err; + + err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_SOFTWARE_INFO_REPLY, &cmd); + if (err) + return err; + + switch (dev->card_data.leaf.family) { + case KVASER_LEAF: + dev->fw_version = le32_to_cpu(cmd.u.leaf.softinfo.fw_version); + dev->max_tx_urbs = + le16_to_cpu(cmd.u.leaf.softinfo.max_outstanding_tx); + break; + case KVASER_USBCAN: + dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version); + dev->max_tx_urbs = + le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx); + break; + } + + return 0; +} + +static int kvaser_usb_leaf_get_software_info(struct kvaser_usb *dev) +{ + int err; + int retry = 3; + + /* On some x86 laptops, plugging a Kvaser device again after + * an unplug makes the firmware always ignore the very first + * command. For such a case, provide some room for retries + * instead of completely exiting the driver. + */ + do { + err = kvaser_usb_leaf_get_software_info_inner(dev); + } while (--retry && err == -ETIMEDOUT); + + return err; +} + +static int kvaser_usb_leaf_get_card_info(struct kvaser_usb *dev) +{ + struct kvaser_cmd cmd; + int err; + + err = kvaser_usb_leaf_send_simple_cmd(dev, CMD_GET_CARD_INFO, 0); + if (err) + return err; + + err = kvaser_usb_leaf_wait_cmd(dev, CMD_GET_CARD_INFO_REPLY, &cmd); + if (err) + return err; + + dev->nchannels = cmd.u.cardinfo.nchannels; + if (dev->nchannels > KVASER_USB_MAX_NET_DEVICES || + (dev->card_data.leaf.family == KVASER_USBCAN && + dev->nchannels > MAX_USBCAN_NET_DEVICES)) + return -EINVAL; + + return 0; +} + +static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct net_device_stats *stats; + struct kvaser_usb_tx_urb_context *context; + struct kvaser_usb_net_priv *priv; + unsigned long flags; + u8 channel, tid; + + channel = cmd->u.tx_acknowledge_header.channel; + tid = cmd->u.tx_acknowledge_header.tid; + + if (channel >= dev->nchannels) { + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", channel); + return; + } + + priv = dev->nets[channel]; + + if (!netif_device_present(priv->netdev)) + return; + + stats = &priv->netdev->stats; + + context = &priv->tx_contexts[tid % dev->max_tx_urbs]; + + /* Sometimes the state change doesn't come after a bus-off event */ + if (priv->can.restart_ms && priv->can.state >= CAN_STATE_BUS_OFF) { + struct sk_buff *skb; + struct can_frame *cf; + + skb = alloc_can_err_skb(priv->netdev, &cf); + if (skb) { + cf->can_id |= CAN_ERR_RESTARTED; + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); + } else { + netdev_err(priv->netdev, + "No memory left for err_skb\n"); + } + + priv->can.can_stats.restarts++; + netif_carrier_on(priv->netdev); + + priv->can.state = CAN_STATE_ERROR_ACTIVE; + } + + stats->tx_packets++; + stats->tx_bytes += context->dlc; + + spin_lock_irqsave(&priv->tx_contexts_lock, flags); + + can_get_echo_skb(priv->netdev, context->echo_index); + context->echo_index = dev->max_tx_urbs; + --priv->active_tx_contexts; + netif_wake_queue(priv->netdev); + + spin_unlock_irqrestore(&priv->tx_contexts_lock, flags); +} + +static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv, + u8 cmd_id) +{ + struct kvaser_cmd *cmd; + int err; + + cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); + if (!cmd) + return -ENOMEM; + + cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_simple); + cmd->id = cmd_id; + cmd->u.simple.channel = priv->channel; + + err = kvaser_usb_send_cmd_async(priv, cmd, cmd->len); + if (err) + kfree(cmd); + + return err; +} + +static void +kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv, + const struct kvaser_usb_err_summary *es, + struct can_frame *cf) +{ + struct kvaser_usb *dev = priv->dev; + struct net_device_stats *stats = &priv->netdev->stats; + enum can_state cur_state, new_state, tx_state, rx_state; + + netdev_dbg(priv->netdev, "Error status: 0x%02x\n", es->status); + + new_state = priv->can.state; + cur_state = priv->can.state; + + if (es->status & (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { + new_state = CAN_STATE_BUS_OFF; + } else if (es->status & M16C_STATE_BUS_PASSIVE) { + new_state = CAN_STATE_ERROR_PASSIVE; + } else if (es->status & M16C_STATE_BUS_ERROR) { + /* Guard against spurious error events after a busoff */ + if (cur_state < CAN_STATE_BUS_OFF) { + if (es->txerr >= 128 || es->rxerr >= 128) + new_state = CAN_STATE_ERROR_PASSIVE; + else if (es->txerr >= 96 || es->rxerr >= 96) + new_state = CAN_STATE_ERROR_WARNING; + else if (cur_state > CAN_STATE_ERROR_ACTIVE) + new_state = CAN_STATE_ERROR_ACTIVE; + } + } + + if (!es->status) + new_state = CAN_STATE_ERROR_ACTIVE; + + if (new_state != cur_state) { + tx_state = (es->txerr >= es->rxerr) ? new_state : 0; + rx_state = (es->txerr <= es->rxerr) ? new_state : 0; + + can_change_state(priv->netdev, cf, tx_state, rx_state); + } + + if (priv->can.restart_ms && + cur_state >= CAN_STATE_BUS_OFF && + new_state < CAN_STATE_BUS_OFF) + priv->can.can_stats.restarts++; + + switch (dev->card_data.leaf.family) { + case KVASER_LEAF: + if (es->leaf.error_factor) { + priv->can.can_stats.bus_error++; + stats->rx_errors++; + } + break; + case KVASER_USBCAN: + if (es->usbcan.error_state & USBCAN_ERROR_STATE_TX_ERROR) + stats->tx_errors++; + if (es->usbcan.error_state & USBCAN_ERROR_STATE_RX_ERROR) + stats->rx_errors++; + if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) + priv->can.can_stats.bus_error++; + break; + } + + priv->bec.txerr = es->txerr; + priv->bec.rxerr = es->rxerr; +} + +static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev, + const struct kvaser_usb_err_summary *es) +{ + struct can_frame *cf; + struct can_frame tmp_cf = { .can_id = CAN_ERR_FLAG, + .can_dlc = CAN_ERR_DLC }; + struct sk_buff *skb; + struct net_device_stats *stats; + struct kvaser_usb_net_priv *priv; + enum can_state old_state, new_state; + + if (es->channel >= dev->nchannels) { + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", es->channel); + return; + } + + priv = dev->nets[es->channel]; + stats = &priv->netdev->stats; + + /* Update all of the CAN interface's state and error counters before + * trying any memory allocation that can actually fail with -ENOMEM. + * + * We send a temporary stack-allocated error CAN frame to + * can_change_state() for the very same reason. + * + * TODO: Split can_change_state() responsibility between updating the + * CAN interface's state and counters, and the setting up of CAN error + * frame ID and data to userspace. Remove stack allocation afterwards. + */ + old_state = priv->can.state; + kvaser_usb_leaf_rx_error_update_can_state(priv, es, &tmp_cf); + new_state = priv->can.state; + + skb = alloc_can_err_skb(priv->netdev, &cf); + if (!skb) { + stats->rx_dropped++; + return; + } + memcpy(cf, &tmp_cf, sizeof(*cf)); + + if (new_state != old_state) { + if (es->status & + (M16C_STATE_BUS_OFF | M16C_STATE_BUS_RESET)) { + if (!priv->can.restart_ms) + kvaser_usb_leaf_simple_cmd_async(priv, + CMD_STOP_CHIP); + netif_carrier_off(priv->netdev); + } + + if (priv->can.restart_ms && + old_state >= CAN_STATE_BUS_OFF && + new_state < CAN_STATE_BUS_OFF) { + cf->can_id |= CAN_ERR_RESTARTED; + netif_carrier_on(priv->netdev); + } + } + + switch (dev->card_data.leaf.family) { + case KVASER_LEAF: + if (es->leaf.error_factor) { + cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_PROT; + + if (es->leaf.error_factor & M16C_EF_ACKE) + cf->data[3] = CAN_ERR_PROT_LOC_ACK; + if (es->leaf.error_factor & M16C_EF_CRCE) + cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; + if (es->leaf.error_factor & M16C_EF_FORME) + cf->data[2] |= CAN_ERR_PROT_FORM; + if (es->leaf.error_factor & M16C_EF_STFE) + cf->data[2] |= CAN_ERR_PROT_STUFF; + if (es->leaf.error_factor & M16C_EF_BITE0) + cf->data[2] |= CAN_ERR_PROT_BIT0; + if (es->leaf.error_factor & M16C_EF_BITE1) + cf->data[2] |= CAN_ERR_PROT_BIT1; + if (es->leaf.error_factor & M16C_EF_TRE) + cf->data[2] |= CAN_ERR_PROT_TX; + } + break; + case KVASER_USBCAN: + if (es->usbcan.error_state & USBCAN_ERROR_STATE_BUSERROR) + cf->can_id |= CAN_ERR_BUSERROR; + break; + } + + cf->data[6] = es->txerr; + cf->data[7] = es->rxerr; + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); +} + +/* For USBCAN, report error to userspace if the channels's errors counter + * has changed, or we're the only channel seeing a bus error state. + */ +static void +kvaser_usb_leaf_usbcan_conditionally_rx_error(const struct kvaser_usb *dev, + struct kvaser_usb_err_summary *es) +{ + struct kvaser_usb_net_priv *priv; + unsigned int channel; + bool report_error; + + channel = es->channel; + if (channel >= dev->nchannels) { + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", channel); + return; + } + + priv = dev->nets[channel]; + report_error = false; + + if (es->txerr != priv->bec.txerr) { + es->usbcan.error_state |= USBCAN_ERROR_STATE_TX_ERROR; + report_error = true; + } + if (es->rxerr != priv->bec.rxerr) { + es->usbcan.error_state |= USBCAN_ERROR_STATE_RX_ERROR; + report_error = true; + } + if ((es->status & M16C_STATE_BUS_ERROR) && + !(es->usbcan.other_ch_status & M16C_STATE_BUS_ERROR)) { + es->usbcan.error_state |= USBCAN_ERROR_STATE_BUSERROR; + report_error = true; + } + + if (report_error) + kvaser_usb_leaf_rx_error(dev, es); +} + +static void kvaser_usb_leaf_usbcan_rx_error(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_err_summary es = { }; + + switch (cmd->id) { + /* Sometimes errors are sent as unsolicited chip state events */ + case CMD_CHIP_STATE_EVENT: + es.channel = cmd->u.usbcan.chip_state_event.channel; + es.status = cmd->u.usbcan.chip_state_event.status; + es.txerr = cmd->u.usbcan.chip_state_event.tx_errors_count; + es.rxerr = cmd->u.usbcan.chip_state_event.rx_errors_count; + kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es); + break; + + case CMD_CAN_ERROR_EVENT: + es.channel = 0; + es.status = cmd->u.usbcan.error_event.status_ch0; + es.txerr = cmd->u.usbcan.error_event.tx_errors_count_ch0; + es.rxerr = cmd->u.usbcan.error_event.rx_errors_count_ch0; + es.usbcan.other_ch_status = + cmd->u.usbcan.error_event.status_ch1; + kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es); + + /* The USBCAN firmware supports up to 2 channels. + * Now that ch0 was checked, check if ch1 has any errors. + */ + if (dev->nchannels == MAX_USBCAN_NET_DEVICES) { + es.channel = 1; + es.status = cmd->u.usbcan.error_event.status_ch1; + es.txerr = + cmd->u.usbcan.error_event.tx_errors_count_ch1; + es.rxerr = + cmd->u.usbcan.error_event.rx_errors_count_ch1; + es.usbcan.other_ch_status = + cmd->u.usbcan.error_event.status_ch0; + kvaser_usb_leaf_usbcan_conditionally_rx_error(dev, &es); + } + break; + + default: + dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id); + } +} + +static void kvaser_usb_leaf_leaf_rx_error(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_err_summary es = { }; + + switch (cmd->id) { + case CMD_CAN_ERROR_EVENT: + es.channel = cmd->u.leaf.error_event.channel; + es.status = cmd->u.leaf.error_event.status; + es.txerr = cmd->u.leaf.error_event.tx_errors_count; + es.rxerr = cmd->u.leaf.error_event.rx_errors_count; + es.leaf.error_factor = cmd->u.leaf.error_event.error_factor; + break; + case CMD_LEAF_LOG_MESSAGE: + es.channel = cmd->u.leaf.log_message.channel; + es.status = cmd->u.leaf.log_message.data[0]; + es.txerr = cmd->u.leaf.log_message.data[2]; + es.rxerr = cmd->u.leaf.log_message.data[3]; + es.leaf.error_factor = cmd->u.leaf.log_message.data[1]; + break; + case CMD_CHIP_STATE_EVENT: + es.channel = cmd->u.leaf.chip_state_event.channel; + es.status = cmd->u.leaf.chip_state_event.status; + es.txerr = cmd->u.leaf.chip_state_event.tx_errors_count; + es.rxerr = cmd->u.leaf.chip_state_event.rx_errors_count; + es.leaf.error_factor = 0; + break; + default: + dev_err(&dev->intf->dev, "Invalid cmd id (%d)\n", cmd->id); + return; + } + + kvaser_usb_leaf_rx_error(dev, &es); +} + +static void kvaser_usb_leaf_rx_can_err(const struct kvaser_usb_net_priv *priv, + const struct kvaser_cmd *cmd) +{ + if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | + MSG_FLAG_NERR)) { + struct net_device_stats *stats = &priv->netdev->stats; + + netdev_err(priv->netdev, "Unknown error (flags: 0x%02x)\n", + cmd->u.rx_can_header.flag); + + stats->rx_errors++; + return; + } + + if (cmd->u.rx_can_header.flag & MSG_FLAG_OVERRUN) + kvaser_usb_can_rx_over_error(priv->netdev); +} + +static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + struct can_frame *cf; + struct sk_buff *skb; + struct net_device_stats *stats; + u8 channel = cmd->u.rx_can_header.channel; + const u8 *rx_data = NULL; /* GCC */ + + if (channel >= dev->nchannels) { + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", channel); + return; + } + + priv = dev->nets[channel]; + stats = &priv->netdev->stats; + + if ((cmd->u.rx_can_header.flag & MSG_FLAG_ERROR_FRAME) && + (dev->card_data.leaf.family == KVASER_LEAF && + cmd->id == CMD_LEAF_LOG_MESSAGE)) { + kvaser_usb_leaf_leaf_rx_error(dev, cmd); + return; + } else if (cmd->u.rx_can_header.flag & (MSG_FLAG_ERROR_FRAME | + MSG_FLAG_NERR | + MSG_FLAG_OVERRUN)) { + kvaser_usb_leaf_rx_can_err(priv, cmd); + return; + } else if (cmd->u.rx_can_header.flag & ~MSG_FLAG_REMOTE_FRAME) { + netdev_warn(priv->netdev, + "Unhandled frame (flags: 0x%02x)\n", + cmd->u.rx_can_header.flag); + return; + } + + switch (dev->card_data.leaf.family) { + case KVASER_LEAF: + rx_data = cmd->u.leaf.rx_can.data; + break; + case KVASER_USBCAN: + rx_data = cmd->u.usbcan.rx_can.data; + break; + } + + skb = alloc_can_skb(priv->netdev, &cf); + if (!skb) { + stats->rx_dropped++; + return; + } + + if (dev->card_data.leaf.family == KVASER_LEAF && cmd->id == + CMD_LEAF_LOG_MESSAGE) { + cf->can_id = le32_to_cpu(cmd->u.leaf.log_message.id); + if (cf->can_id & KVASER_EXTENDED_FRAME) + cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG; + else + cf->can_id &= CAN_SFF_MASK; + + cf->can_dlc = get_can_dlc(cmd->u.leaf.log_message.dlc); + + if (cmd->u.leaf.log_message.flags & MSG_FLAG_REMOTE_FRAME) + cf->can_id |= CAN_RTR_FLAG; + else + memcpy(cf->data, &cmd->u.leaf.log_message.data, + cf->can_dlc); + } else { + cf->can_id = ((rx_data[0] & 0x1f) << 6) | (rx_data[1] & 0x3f); + + if (cmd->id == CMD_RX_EXT_MESSAGE) { + cf->can_id <<= 18; + cf->can_id |= ((rx_data[2] & 0x0f) << 14) | + ((rx_data[3] & 0xff) << 6) | + (rx_data[4] & 0x3f); + cf->can_id |= CAN_EFF_FLAG; + } + + cf->can_dlc = get_can_dlc(rx_data[5]); + + if (cmd->u.rx_can_header.flag & MSG_FLAG_REMOTE_FRAME) + cf->can_id |= CAN_RTR_FLAG; + else + memcpy(cf->data, &rx_data[6], cf->can_dlc); + } + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_rx(skb); +} + +static void kvaser_usb_leaf_start_chip_reply(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + u8 channel = cmd->u.simple.channel; + + if (channel >= dev->nchannels) { + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", channel); + return; + } + + priv = dev->nets[channel]; + + if (completion_done(&priv->start_comp) && + netif_queue_stopped(priv->netdev)) { + netif_wake_queue(priv->netdev); + } else { + netif_start_queue(priv->netdev); + complete(&priv->start_comp); + } +} + +static void kvaser_usb_leaf_stop_chip_reply(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + struct kvaser_usb_net_priv *priv; + u8 channel = cmd->u.simple.channel; + + if (channel >= dev->nchannels) { + dev_err(&dev->intf->dev, + "Invalid channel number (%d)\n", channel); + return; + } + + priv = dev->nets[channel]; + + complete(&priv->stop_comp); +} + +static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev, + const struct kvaser_cmd *cmd) +{ + switch (cmd->id) { + case CMD_START_CHIP_REPLY: + kvaser_usb_leaf_start_chip_reply(dev, cmd); + break; + + case CMD_STOP_CHIP_REPLY: + kvaser_usb_leaf_stop_chip_reply(dev, cmd); + break; + + case CMD_RX_STD_MESSAGE: + case CMD_RX_EXT_MESSAGE: + kvaser_usb_leaf_rx_can_msg(dev, cmd); + break; + + case CMD_LEAF_LOG_MESSAGE: + if (dev->card_data.leaf.family != KVASER_LEAF) + goto warn; + kvaser_usb_leaf_rx_can_msg(dev, cmd); + break; + + case CMD_CHIP_STATE_EVENT: + case CMD_CAN_ERROR_EVENT: + if (dev->card_data.leaf.family == KVASER_LEAF) + kvaser_usb_leaf_leaf_rx_error(dev, cmd); + else + kvaser_usb_leaf_usbcan_rx_error(dev, cmd); + break; + + case CMD_TX_ACKNOWLEDGE: + kvaser_usb_leaf_tx_acknowledge(dev, cmd); + break; + + /* Ignored commands */ + case CMD_USBCAN_CLOCK_OVERFLOW_EVENT: + if (dev->card_data.leaf.family != KVASER_USBCAN) + goto warn; + break; + + case CMD_FLUSH_QUEUE_REPLY: + if (dev->card_data.leaf.family != KVASER_LEAF) + goto warn; + break; + + default: +warn: dev_warn(&dev->intf->dev, "Unhandled command (%d)\n", cmd->id); + break; + } +} + +static void kvaser_usb_leaf_read_bulk_callback(struct kvaser_usb *dev, + void *buf, int len) +{ + struct kvaser_cmd *cmd; + int pos = 0; + + while (pos <= len - CMD_HEADER_LEN) { + cmd = buf + pos; + + /* The Kvaser firmware can only read and write commands that + * does not cross the USB's endpoint wMaxPacketSize boundary. + * If a follow-up command crosses such boundary, firmware puts + * a placeholder zero-length command in its place then aligns + * the real command to the next max packet size. + * + * Handle such cases or we're going to miss a significant + * number of events in case of a heavy rx load on the bus. + */ + if (cmd->len == 0) { + pos = round_up(pos, le16_to_cpu + (dev->bulk_in->wMaxPacketSize)); + continue; + } + + if (pos + cmd->len > len) { + dev_err_ratelimited(&dev->intf->dev, "Format error\n"); + break; + } + + kvaser_usb_leaf_handle_command(dev, cmd); + pos += cmd->len; + } +} + +static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv) +{ + struct kvaser_cmd *cmd; + int rc; + + cmd = kmalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->id = CMD_SET_CTRL_MODE; + cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_ctrl_mode); + cmd->u.ctrl_mode.tid = 0xff; + cmd->u.ctrl_mode.channel = priv->channel; + + if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) + cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT; + else + cmd->u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL; + + rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len); + + kfree(cmd); + return rc; +} + +static int kvaser_usb_leaf_start_chip(struct kvaser_usb_net_priv *priv) +{ + int err; + + init_completion(&priv->start_comp); + + err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_START_CHIP, + priv->channel); + if (err) + return err; + + if (!wait_for_completion_timeout(&priv->start_comp, + msecs_to_jiffies(KVASER_USB_TIMEOUT))) + return -ETIMEDOUT; + + return 0; +} + +static int kvaser_usb_leaf_stop_chip(struct kvaser_usb_net_priv *priv) +{ + int err; + + init_completion(&priv->stop_comp); + + err = kvaser_usb_leaf_send_simple_cmd(priv->dev, CMD_STOP_CHIP, + priv->channel); + if (err) + return err; + + if (!wait_for_completion_timeout(&priv->stop_comp, + msecs_to_jiffies(KVASER_USB_TIMEOUT))) + return -ETIMEDOUT; + + return 0; +} + +static int kvaser_usb_leaf_reset_chip(struct kvaser_usb *dev, int channel) +{ + return kvaser_usb_leaf_send_simple_cmd(dev, CMD_RESET_CHIP, channel); +} + +static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv) +{ + struct kvaser_cmd *cmd; + int rc; + + cmd = kmalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->id = CMD_FLUSH_QUEUE; + cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_flush_queue); + cmd->u.flush_queue.channel = priv->channel; + cmd->u.flush_queue.flags = 0x00; + + rc = kvaser_usb_send_cmd(priv->dev, cmd, cmd->len); + + kfree(cmd); + return rc; +} + +static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev) +{ + struct kvaser_usb_dev_card_data *card_data = &dev->card_data; + + dev->cfg = &kvaser_usb_leaf_dev_cfg; + card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; + + return 0; +} + +static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = { + .name = "kvaser_usb", + .tseg1_min = KVASER_USB_TSEG1_MIN, + .tseg1_max = KVASER_USB_TSEG1_MAX, + .tseg2_min = KVASER_USB_TSEG2_MIN, + .tseg2_max = KVASER_USB_TSEG2_MAX, + .sjw_max = KVASER_USB_SJW_MAX, + .brp_min = KVASER_USB_BRP_MIN, + .brp_max = KVASER_USB_BRP_MAX, + .brp_inc = KVASER_USB_BRP_INC, +}; + +static int kvaser_usb_leaf_set_bittiming(struct net_device *netdev) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + struct can_bittiming *bt = &priv->can.bittiming; + struct kvaser_usb *dev = priv->dev; + struct kvaser_cmd *cmd; + int rc; + + cmd = kmalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + cmd->id = CMD_SET_BUS_PARAMS; + cmd->len = CMD_HEADER_LEN + sizeof(struct kvaser_cmd_busparams); + cmd->u.busparams.channel = priv->channel; + cmd->u.busparams.tid = 0xff; + cmd->u.busparams.bitrate = cpu_to_le32(bt->bitrate); + cmd->u.busparams.sjw = bt->sjw; + cmd->u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1; + cmd->u.busparams.tseg2 = bt->phase_seg2; + + if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) + cmd->u.busparams.no_samp = 3; + else + cmd->u.busparams.no_samp = 1; + + rc = kvaser_usb_send_cmd(dev, cmd, cmd->len); + + kfree(cmd); + return rc; +} + +static int kvaser_usb_leaf_set_mode(struct net_device *netdev, + enum can_mode mode) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + int err; + + switch (mode) { + case CAN_MODE_START: + err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP); + if (err) + return err; + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static int kvaser_usb_leaf_get_berr_counter(const struct net_device *netdev, + struct can_berr_counter *bec) +{ + struct kvaser_usb_net_priv *priv = netdev_priv(netdev); + + *bec = priv->bec; + + return 0; +} + +static int kvaser_usb_leaf_setup_endpoints(struct kvaser_usb *dev) +{ + const struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + int i; + + iface_desc = &dev->intf->altsetting[0]; + + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if (!dev->bulk_in && usb_endpoint_is_bulk_in(endpoint)) + dev->bulk_in = endpoint; + + if (!dev->bulk_out && usb_endpoint_is_bulk_out(endpoint)) + dev->bulk_out = endpoint; + + /* use first bulk endpoint for in and out */ + if (dev->bulk_in && dev->bulk_out) + return 0; + } + + return -ENODEV; +} + +const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = { + .dev_set_mode = kvaser_usb_leaf_set_mode, + .dev_set_bittiming = kvaser_usb_leaf_set_bittiming, + .dev_set_data_bittiming = NULL, + .dev_get_berr_counter = kvaser_usb_leaf_get_berr_counter, + .dev_setup_endpoints = kvaser_usb_leaf_setup_endpoints, + .dev_init_card = kvaser_usb_leaf_init_card, + .dev_get_software_info = kvaser_usb_leaf_get_software_info, + .dev_get_software_details = NULL, + .dev_get_card_info = kvaser_usb_leaf_get_card_info, + .dev_get_capabilities = NULL, + .dev_set_opt_mode = kvaser_usb_leaf_set_opt_mode, + .dev_start_chip = kvaser_usb_leaf_start_chip, + .dev_stop_chip = kvaser_usb_leaf_stop_chip, + .dev_reset_chip = kvaser_usb_leaf_reset_chip, + .dev_flush_queue = kvaser_usb_leaf_flush_queue, + .dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback, + .dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg = { + .clock = { + .freq = CAN_USB_CLOCK, + }, + .timestamp_freq = 1, + .bittiming_const = &kvaser_usb_leaf_bittiming_const, +}; diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c index f530a80f5051..13238a72a338 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb.c @@ -423,6 +423,7 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n, new_state = CAN_STATE_ERROR_WARNING; break; } + /* else: fall through */ case CAN_STATE_ERROR_WARNING: if (n & PCAN_USB_ERROR_BUS_HEAVY) { diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c index 50e911428638..611f9d31be5d 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c @@ -353,6 +353,7 @@ static netdev_tx_t peak_usb_ndo_start_xmit(struct sk_buff *skb, default: netdev_warn(netdev, "tx urb submitting failed err=%d\n", err); + /* fall through */ case -ENOENT: /* cable unplugged */ stats->tx_dropped++; diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c index 0105fbfea273..d516def846ab 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c @@ -141,8 +141,10 @@ static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, u8 id, ...) switch (id) { case PCAN_USBPRO_TXMSG8: i += 4; + /* fall through */ case PCAN_USBPRO_TXMSG4: i += 4; + /* fall through */ case PCAN_USBPRO_TXMSG0: *pc++ = va_arg(ap, int); *pc++ = va_arg(ap, int); diff --git a/drivers/net/can/usb/ucan.c b/drivers/net/can/usb/ucan.c new file mode 100644 index 000000000000..0678a38b1af4 --- /dev/null +++ b/drivers/net/can/usb/ucan.c @@ -0,0 +1,1613 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Driver for Theobroma Systems UCAN devices, Protocol Version 3 + * + * Copyright (C) 2018 Theobroma Systems Design und Consulting GmbH + * + * + * General Description: + * + * The USB Device uses three Endpoints: + * + * CONTROL Endpoint: Is used the setup the device (start, stop, + * info, configure). + * + * IN Endpoint: The device sends CAN Frame Messages and Device + * Information using the IN endpoint. + * + * OUT Endpoint: The driver sends configuration requests, and CAN + * Frames on the out endpoint. + * + * Error Handling: + * + * If error reporting is turned on the device encodes error into CAN + * error frames (see uapi/linux/can/error.h) and sends it using the + * IN Endpoint. The driver updates statistics and forward it. + */ + +#include <linux/can.h> +#include <linux/can/dev.h> +#include <linux/can/error.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/signal.h> +#include <linux/skbuff.h> +#include <linux/slab.h> +#include <linux/usb.h> + +#include <linux/can.h> +#include <linux/can/dev.h> +#include <linux/can/error.h> + +#define UCAN_DRIVER_NAME "ucan" +#define UCAN_MAX_RX_URBS 8 +/* the CAN controller needs a while to enable/disable the bus */ +#define UCAN_USB_CTL_PIPE_TIMEOUT 1000 +/* this driver currently supports protocol version 3 only */ +#define UCAN_PROTOCOL_VERSION_MIN 3 +#define UCAN_PROTOCOL_VERSION_MAX 3 + +/* UCAN Message Definitions + * ------------------------ + * + * ucan_message_out_t and ucan_message_in_t define the messages + * transmitted on the OUT and IN endpoint. + * + * Multibyte fields are transmitted with little endianness + * + * INTR Endpoint: a single uint32_t storing the current space in the fifo + * + * OUT Endpoint: single message of type ucan_message_out_t is + * transmitted on the out endpoint + * + * IN Endpoint: multiple messages ucan_message_in_t concateted in + * the following way: + * + * m[n].len <=> the length if message n(including the header in bytes) + * m[n] is is aligned to a 4 byte boundary, hence + * offset(m[0]) := 0; + * offset(m[n+1]) := offset(m[n]) + (m[n].len + 3) & 3 + * + * this implies that + * offset(m[n]) % 4 <=> 0 + */ + +/* Device Global Commands */ +enum { + UCAN_DEVICE_GET_FW_STRING = 0, +}; + +/* UCAN Commands */ +enum { + /* start the can transceiver - val defines the operation mode */ + UCAN_COMMAND_START = 0, + /* cancel pending transmissions and stop the can transceiver */ + UCAN_COMMAND_STOP = 1, + /* send can transceiver into low-power sleep mode */ + UCAN_COMMAND_SLEEP = 2, + /* wake up can transceiver from low-power sleep mode */ + UCAN_COMMAND_WAKEUP = 3, + /* reset the can transceiver */ + UCAN_COMMAND_RESET = 4, + /* get piece of info from the can transceiver - subcmd defines what + * piece + */ + UCAN_COMMAND_GET = 5, + /* clear or disable hardware filter - subcmd defines which of the two */ + UCAN_COMMAND_FILTER = 6, + /* Setup bittiming */ + UCAN_COMMAND_SET_BITTIMING = 7, + /* recover from bus-off state */ + UCAN_COMMAND_RESTART = 8, +}; + +/* UCAN_COMMAND_START and UCAN_COMMAND_GET_INFO operation modes (bitmap). + * Undefined bits must be set to 0. + */ +enum { + UCAN_MODE_LOOPBACK = BIT(0), + UCAN_MODE_SILENT = BIT(1), + UCAN_MODE_3_SAMPLES = BIT(2), + UCAN_MODE_ONE_SHOT = BIT(3), + UCAN_MODE_BERR_REPORT = BIT(4), +}; + +/* UCAN_COMMAND_GET subcommands */ +enum { + UCAN_COMMAND_GET_INFO = 0, + UCAN_COMMAND_GET_PROTOCOL_VERSION = 1, +}; + +/* UCAN_COMMAND_FILTER subcommands */ +enum { + UCAN_FILTER_CLEAR = 0, + UCAN_FILTER_DISABLE = 1, + UCAN_FILTER_ENABLE = 2, +}; + +/* OUT endpoint message types */ +enum { + UCAN_OUT_TX = 2, /* transmit a CAN frame */ +}; + +/* IN endpoint message types */ +enum { + UCAN_IN_TX_COMPLETE = 1, /* CAN frame transmission completed */ + UCAN_IN_RX = 2, /* CAN frame received */ +}; + +struct ucan_ctl_cmd_start { + __le16 mode; /* OR-ing any of UCAN_MODE_* */ +} __packed; + +struct ucan_ctl_cmd_set_bittiming { + __le32 tq; /* Time quanta (TQ) in nanoseconds */ + __le16 brp; /* TQ Prescaler */ + __le16 sample_point; /* Samplepoint on tenth percent */ + u8 prop_seg; /* Propagation segment in TQs */ + u8 phase_seg1; /* Phase buffer segment 1 in TQs */ + u8 phase_seg2; /* Phase buffer segment 2 in TQs */ + u8 sjw; /* Synchronisation jump width in TQs */ +} __packed; + +struct ucan_ctl_cmd_device_info { + __le32 freq; /* Clock Frequency for tq generation */ + u8 tx_fifo; /* Size of the transmission fifo */ + u8 sjw_max; /* can_bittiming fields... */ + u8 tseg1_min; + u8 tseg1_max; + u8 tseg2_min; + u8 tseg2_max; + __le16 brp_inc; + __le32 brp_min; + __le32 brp_max; /* ...can_bittiming fields */ + __le16 ctrlmodes; /* supported control modes */ + __le16 hwfilter; /* Number of HW filter banks */ + __le16 rxmboxes; /* Number of receive Mailboxes */ +} __packed; + +struct ucan_ctl_cmd_get_protocol_version { + __le32 version; +} __packed; + +union ucan_ctl_payload { + /* Setup Bittiming + * bmRequest == UCAN_COMMAND_START + */ + struct ucan_ctl_cmd_start cmd_start; + /* Setup Bittiming + * bmRequest == UCAN_COMMAND_SET_BITTIMING + */ + struct ucan_ctl_cmd_set_bittiming cmd_set_bittiming; + /* Get Device Information + * bmRequest == UCAN_COMMAND_GET; wValue = UCAN_COMMAND_GET_INFO + */ + struct ucan_ctl_cmd_device_info cmd_get_device_info; + /* Get Protocol Version + * bmRequest == UCAN_COMMAND_GET; + * wValue = UCAN_COMMAND_GET_PROTOCOL_VERSION + */ + struct ucan_ctl_cmd_get_protocol_version cmd_get_protocol_version; + + u8 raw[128]; +} __packed; + +enum { + UCAN_TX_COMPLETE_SUCCESS = BIT(0), +}; + +/* Transmission Complete within ucan_message_in */ +struct ucan_tx_complete_entry_t { + u8 echo_index; + u8 flags; +} __packed __aligned(0x2); + +/* CAN Data message format within ucan_message_in/out */ +struct ucan_can_msg { + /* note DLC is computed by + * msg.len - sizeof (msg.len) + * - sizeof (msg.type) + * - sizeof (msg.can_msg.id) + */ + __le32 id; + + union { + u8 data[CAN_MAX_DLEN]; /* Data of CAN frames */ + u8 dlc; /* RTR dlc */ + }; +} __packed; + +/* OUT Endpoint, outbound messages */ +struct ucan_message_out { + __le16 len; /* Length of the content include header */ + u8 type; /* UCAN_OUT_TX and friends */ + u8 subtype; /* command sub type */ + + union { + /* Transmit CAN frame + * (type == UCAN_TX) && ((msg.can_msg.id & CAN_RTR_FLAG) == 0) + * subtype stores the echo id + */ + struct ucan_can_msg can_msg; + } msg; +} __packed __aligned(0x4); + +/* IN Endpoint, inbound messages */ +struct ucan_message_in { + __le16 len; /* Length of the content include header */ + u8 type; /* UCAN_IN_RX and friends */ + u8 subtype; /* command sub type */ + + union { + /* CAN Frame received + * (type == UCAN_IN_RX) + * && ((msg.can_msg.id & CAN_RTR_FLAG) == 0) + */ + struct ucan_can_msg can_msg; + + /* CAN transmission complete + * (type == UCAN_IN_TX_COMPLETE) + */ + struct ucan_tx_complete_entry_t can_tx_complete_msg[0]; + } __aligned(0x4) msg; +} __packed; + +/* Macros to calculate message lengths */ +#define UCAN_OUT_HDR_SIZE offsetof(struct ucan_message_out, msg) + +#define UCAN_IN_HDR_SIZE offsetof(struct ucan_message_in, msg) +#define UCAN_IN_LEN(member) (UCAN_OUT_HDR_SIZE + sizeof(member)) + +struct ucan_priv; + +/* Context Information for transmission URBs */ +struct ucan_urb_context { + struct ucan_priv *up; + u8 dlc; + bool allocated; +}; + +/* Information reported by the USB device */ +struct ucan_device_info { + struct can_bittiming_const bittiming_const; + u8 tx_fifo; +}; + +/* Driver private data */ +struct ucan_priv { + /* must be the first member */ + struct can_priv can; + + /* linux USB device structures */ + struct usb_device *udev; + struct usb_interface *intf; + struct net_device *netdev; + + /* lock for can->echo_skb (used around + * can_put/get/free_echo_skb + */ + spinlock_t echo_skb_lock; + + /* usb device information information */ + u8 intf_index; + u8 in_ep_addr; + u8 out_ep_addr; + u16 in_ep_size; + + /* transmission and reception buffers */ + struct usb_anchor rx_urbs; + struct usb_anchor tx_urbs; + + union ucan_ctl_payload *ctl_msg_buffer; + struct ucan_device_info device_info; + + /* transmission control information and locks */ + spinlock_t context_lock; + unsigned int available_tx_urbs; + struct ucan_urb_context *context_array; +}; + +static u8 ucan_get_can_dlc(struct ucan_can_msg *msg, u16 len) +{ + if (le32_to_cpu(msg->id) & CAN_RTR_FLAG) + return get_can_dlc(msg->dlc); + else + return get_can_dlc(len - (UCAN_IN_HDR_SIZE + sizeof(msg->id))); +} + +static void ucan_release_context_array(struct ucan_priv *up) +{ + if (!up->context_array) + return; + + /* lock is not needed because, driver is currently opening or closing */ + up->available_tx_urbs = 0; + + kfree(up->context_array); + up->context_array = NULL; +} + +static int ucan_alloc_context_array(struct ucan_priv *up) +{ + int i; + + /* release contexts if any */ + ucan_release_context_array(up); + + up->context_array = kcalloc(up->device_info.tx_fifo, + sizeof(*up->context_array), + GFP_KERNEL); + if (!up->context_array) { + netdev_err(up->netdev, + "Not enough memory to allocate tx contexts\n"); + return -ENOMEM; + } + + for (i = 0; i < up->device_info.tx_fifo; i++) { + up->context_array[i].allocated = false; + up->context_array[i].up = up; + } + + /* lock is not needed because, driver is currently opening */ + up->available_tx_urbs = up->device_info.tx_fifo; + + return 0; +} + +static struct ucan_urb_context *ucan_alloc_context(struct ucan_priv *up) +{ + int i; + unsigned long flags; + struct ucan_urb_context *ret = NULL; + + if (WARN_ON_ONCE(!up->context_array)) + return NULL; + + /* execute context operation atomically */ + spin_lock_irqsave(&up->context_lock, flags); + + for (i = 0; i < up->device_info.tx_fifo; i++) { + if (!up->context_array[i].allocated) { + /* update context */ + ret = &up->context_array[i]; + up->context_array[i].allocated = true; + + /* stop queue if necessary */ + up->available_tx_urbs--; + if (!up->available_tx_urbs) + netif_stop_queue(up->netdev); + + break; + } + } + + spin_unlock_irqrestore(&up->context_lock, flags); + return ret; +} + +static bool ucan_release_context(struct ucan_priv *up, + struct ucan_urb_context *ctx) +{ + unsigned long flags; + bool ret = false; + + if (WARN_ON_ONCE(!up->context_array)) + return false; + + /* execute context operation atomically */ + spin_lock_irqsave(&up->context_lock, flags); + + /* context was not allocated, maybe the device sent garbage */ + if (ctx->allocated) { + ctx->allocated = false; + + /* check if the queue needs to be woken */ + if (!up->available_tx_urbs) + netif_wake_queue(up->netdev); + up->available_tx_urbs++; + + ret = true; + } + + spin_unlock_irqrestore(&up->context_lock, flags); + return ret; +} + +static int ucan_ctrl_command_out(struct ucan_priv *up, + u8 cmd, u16 subcmd, u16 datalen) +{ + return usb_control_msg(up->udev, + usb_sndctrlpipe(up->udev, 0), + cmd, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_INTERFACE, + subcmd, + up->intf_index, + up->ctl_msg_buffer, + datalen, + UCAN_USB_CTL_PIPE_TIMEOUT); +} + +static int ucan_device_request_in(struct ucan_priv *up, + u8 cmd, u16 subcmd, u16 datalen) +{ + return usb_control_msg(up->udev, + usb_rcvctrlpipe(up->udev, 0), + cmd, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + subcmd, + 0, + up->ctl_msg_buffer, + datalen, + UCAN_USB_CTL_PIPE_TIMEOUT); +} + +/* Parse the device information structure reported by the device and + * setup private variables accordingly + */ +static void ucan_parse_device_info(struct ucan_priv *up, + struct ucan_ctl_cmd_device_info *device_info) +{ + struct can_bittiming_const *bittiming = + &up->device_info.bittiming_const; + u16 ctrlmodes; + + /* store the data */ + up->can.clock.freq = le32_to_cpu(device_info->freq); + up->device_info.tx_fifo = device_info->tx_fifo; + strcpy(bittiming->name, "ucan"); + bittiming->tseg1_min = device_info->tseg1_min; + bittiming->tseg1_max = device_info->tseg1_max; + bittiming->tseg2_min = device_info->tseg2_min; + bittiming->tseg2_max = device_info->tseg2_max; + bittiming->sjw_max = device_info->sjw_max; + bittiming->brp_min = le32_to_cpu(device_info->brp_min); + bittiming->brp_max = le32_to_cpu(device_info->brp_max); + bittiming->brp_inc = le16_to_cpu(device_info->brp_inc); + + ctrlmodes = le16_to_cpu(device_info->ctrlmodes); + + up->can.ctrlmode_supported = 0; + + if (ctrlmodes & UCAN_MODE_LOOPBACK) + up->can.ctrlmode_supported |= CAN_CTRLMODE_LOOPBACK; + if (ctrlmodes & UCAN_MODE_SILENT) + up->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY; + if (ctrlmodes & UCAN_MODE_3_SAMPLES) + up->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; + if (ctrlmodes & UCAN_MODE_ONE_SHOT) + up->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT; + if (ctrlmodes & UCAN_MODE_BERR_REPORT) + up->can.ctrlmode_supported |= CAN_CTRLMODE_BERR_REPORTING; +} + +/* Handle a CAN error frame that we have received from the device. + * Returns true if the can state has changed. + */ +static bool ucan_handle_error_frame(struct ucan_priv *up, + struct ucan_message_in *m, + canid_t canid) +{ + enum can_state new_state = up->can.state; + struct net_device_stats *net_stats = &up->netdev->stats; + struct can_device_stats *can_stats = &up->can.can_stats; + + if (canid & CAN_ERR_LOSTARB) + can_stats->arbitration_lost++; + + if (canid & CAN_ERR_BUSERROR) + can_stats->bus_error++; + + if (canid & CAN_ERR_ACK) + net_stats->tx_errors++; + + if (canid & CAN_ERR_BUSOFF) + new_state = CAN_STATE_BUS_OFF; + + /* controller problems, details in data[1] */ + if (canid & CAN_ERR_CRTL) { + u8 d1 = m->msg.can_msg.data[1]; + + if (d1 & CAN_ERR_CRTL_RX_OVERFLOW) + net_stats->rx_over_errors++; + + /* controller state bits: if multiple are set the worst wins */ + if (d1 & CAN_ERR_CRTL_ACTIVE) + new_state = CAN_STATE_ERROR_ACTIVE; + + if (d1 & (CAN_ERR_CRTL_RX_WARNING | CAN_ERR_CRTL_TX_WARNING)) + new_state = CAN_STATE_ERROR_WARNING; + + if (d1 & (CAN_ERR_CRTL_RX_PASSIVE | CAN_ERR_CRTL_TX_PASSIVE)) + new_state = CAN_STATE_ERROR_PASSIVE; + } + + /* protocol error, details in data[2] */ + if (canid & CAN_ERR_PROT) { + u8 d2 = m->msg.can_msg.data[2]; + + if (d2 & CAN_ERR_PROT_TX) + net_stats->tx_errors++; + else + net_stats->rx_errors++; + } + + /* no state change - we are done */ + if (up->can.state == new_state) + return false; + + /* we switched into a better state */ + if (up->can.state > new_state) { + up->can.state = new_state; + return true; + } + + /* we switched into a worse state */ + up->can.state = new_state; + switch (new_state) { + case CAN_STATE_BUS_OFF: + can_stats->bus_off++; + can_bus_off(up->netdev); + break; + case CAN_STATE_ERROR_PASSIVE: + can_stats->error_passive++; + break; + case CAN_STATE_ERROR_WARNING: + can_stats->error_warning++; + break; + default: + break; + } + return true; +} + +/* Callback on reception of a can frame via the IN endpoint + * + * This function allocates an skb and transferres it to the Linux + * network stack + */ +static void ucan_rx_can_msg(struct ucan_priv *up, struct ucan_message_in *m) +{ + int len; + canid_t canid; + struct can_frame *cf; + struct sk_buff *skb; + struct net_device_stats *stats = &up->netdev->stats; + + /* get the contents of the length field */ + len = le16_to_cpu(m->len); + + /* check sanity */ + if (len < UCAN_IN_HDR_SIZE + sizeof(m->msg.can_msg.id)) { + netdev_warn(up->netdev, "invalid input message len: %d\n", len); + return; + } + + /* handle error frames */ + canid = le32_to_cpu(m->msg.can_msg.id); + if (canid & CAN_ERR_FLAG) { + bool busstate_changed = ucan_handle_error_frame(up, m, canid); + + /* if berr-reporting is off only state changes get through */ + if (!(up->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) && + !busstate_changed) + return; + } else { + canid_t canid_mask; + /* compute the mask for canid */ + canid_mask = CAN_RTR_FLAG; + if (canid & CAN_EFF_FLAG) + canid_mask |= CAN_EFF_MASK | CAN_EFF_FLAG; + else + canid_mask |= CAN_SFF_MASK; + + if (canid & ~canid_mask) + netdev_warn(up->netdev, + "unexpected bits set (canid %x, mask %x)", + canid, canid_mask); + + canid &= canid_mask; + } + + /* allocate skb */ + skb = alloc_can_skb(up->netdev, &cf); + if (!skb) + return; + + /* fill the can frame */ + cf->can_id = canid; + + /* compute DLC taking RTR_FLAG into account */ + cf->can_dlc = ucan_get_can_dlc(&m->msg.can_msg, len); + + /* copy the payload of non RTR frames */ + if (!(cf->can_id & CAN_RTR_FLAG) || (cf->can_id & CAN_ERR_FLAG)) + memcpy(cf->data, m->msg.can_msg.data, cf->can_dlc); + + /* don't count error frames as real packets */ + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + + /* pass it to Linux */ + netif_rx(skb); +} + +/* callback indicating completed transmission */ +static void ucan_tx_complete_msg(struct ucan_priv *up, + struct ucan_message_in *m) +{ + unsigned long flags; + u16 count, i; + u8 echo_index, dlc; + u16 len = le16_to_cpu(m->len); + + struct ucan_urb_context *context; + + if (len < UCAN_IN_HDR_SIZE || (len % 2 != 0)) { + netdev_err(up->netdev, "invalid tx complete length\n"); + return; + } + + count = (len - UCAN_IN_HDR_SIZE) / 2; + for (i = 0; i < count; i++) { + /* we did not submit such echo ids */ + echo_index = m->msg.can_tx_complete_msg[i].echo_index; + if (echo_index >= up->device_info.tx_fifo) { + up->netdev->stats.tx_errors++; + netdev_err(up->netdev, + "invalid echo_index %d received\n", + echo_index); + continue; + } + + /* gather information from the context */ + context = &up->context_array[echo_index]; + dlc = READ_ONCE(context->dlc); + + /* Release context and restart queue if necessary. + * Also check if the context was allocated + */ + if (!ucan_release_context(up, context)) + continue; + + spin_lock_irqsave(&up->echo_skb_lock, flags); + if (m->msg.can_tx_complete_msg[i].flags & + UCAN_TX_COMPLETE_SUCCESS) { + /* update statistics */ + up->netdev->stats.tx_packets++; + up->netdev->stats.tx_bytes += dlc; + can_get_echo_skb(up->netdev, echo_index); + } else { + up->netdev->stats.tx_dropped++; + can_free_echo_skb(up->netdev, echo_index); + } + spin_unlock_irqrestore(&up->echo_skb_lock, flags); + } +} + +/* callback on reception of a USB message */ +static void ucan_read_bulk_callback(struct urb *urb) +{ + int ret; + int pos; + struct ucan_priv *up = urb->context; + struct net_device *netdev = up->netdev; + struct ucan_message_in *m; + + /* the device is not up and the driver should not receive any + * data on the bulk in pipe + */ + if (WARN_ON(!up->context_array)) { + usb_free_coherent(up->udev, + up->in_ep_size, + urb->transfer_buffer, + urb->transfer_dma); + return; + } + + /* check URB status */ + switch (urb->status) { + case 0: + break; + case -ENOENT: + case -EPIPE: + case -EPROTO: + case -ESHUTDOWN: + case -ETIME: + /* urb is not resubmitted -> free dma data */ + usb_free_coherent(up->udev, + up->in_ep_size, + urb->transfer_buffer, + urb->transfer_dma); + netdev_dbg(up->netdev, "not resumbmitting urb; status: %d\n", + urb->status); + return; + default: + goto resubmit; + } + + /* sanity check */ + if (!netif_device_present(netdev)) + return; + + /* iterate over input */ + pos = 0; + while (pos < urb->actual_length) { + int len; + + /* check sanity (length of header) */ + if ((urb->actual_length - pos) < UCAN_IN_HDR_SIZE) { + netdev_warn(up->netdev, + "invalid message (short; no hdr; l:%d)\n", + urb->actual_length); + goto resubmit; + } + + /* setup the message address */ + m = (struct ucan_message_in *) + ((u8 *)urb->transfer_buffer + pos); + len = le16_to_cpu(m->len); + + /* check sanity (length of content) */ + if (urb->actual_length - pos < len) { + netdev_warn(up->netdev, + "invalid message (short; no data; l:%d)\n", + urb->actual_length); + print_hex_dump(KERN_WARNING, + "raw data: ", + DUMP_PREFIX_ADDRESS, + 16, + 1, + urb->transfer_buffer, + urb->actual_length, + true); + + goto resubmit; + } + + switch (m->type) { + case UCAN_IN_RX: + ucan_rx_can_msg(up, m); + break; + case UCAN_IN_TX_COMPLETE: + ucan_tx_complete_msg(up, m); + break; + default: + netdev_warn(up->netdev, + "invalid message (type; t:%d)\n", + m->type); + break; + } + + /* proceed to next message */ + pos += len; + /* align to 4 byte boundary */ + pos = round_up(pos, 4); + } + +resubmit: + /* resubmit urb when done */ + usb_fill_bulk_urb(urb, up->udev, + usb_rcvbulkpipe(up->udev, + up->in_ep_addr), + urb->transfer_buffer, + up->in_ep_size, + ucan_read_bulk_callback, + up); + + usb_anchor_urb(urb, &up->rx_urbs); + ret = usb_submit_urb(urb, GFP_KERNEL); + + if (ret < 0) { + netdev_err(up->netdev, + "failed resubmitting read bulk urb: %d\n", + ret); + + usb_unanchor_urb(urb); + usb_free_coherent(up->udev, + up->in_ep_size, + urb->transfer_buffer, + urb->transfer_dma); + + if (ret == -ENODEV) + netif_device_detach(netdev); + } +} + +/* callback after transmission of a USB message */ +static void ucan_write_bulk_callback(struct urb *urb) +{ + unsigned long flags; + struct ucan_priv *up; + struct ucan_urb_context *context = urb->context; + + /* get the urb context */ + if (WARN_ON_ONCE(!context)) + return; + + /* free up our allocated buffer */ + usb_free_coherent(urb->dev, + sizeof(struct ucan_message_out), + urb->transfer_buffer, + urb->transfer_dma); + + up = context->up; + if (WARN_ON_ONCE(!up)) + return; + + /* sanity check */ + if (!netif_device_present(up->netdev)) + return; + + /* transmission failed (USB - the device will not send a TX complete) */ + if (urb->status) { + netdev_warn(up->netdev, + "failed to transmit USB message to device: %d\n", + urb->status); + + /* update counters an cleanup */ + spin_lock_irqsave(&up->echo_skb_lock, flags); + can_free_echo_skb(up->netdev, context - up->context_array); + spin_unlock_irqrestore(&up->echo_skb_lock, flags); + + up->netdev->stats.tx_dropped++; + + /* release context and restart the queue if necessary */ + if (!ucan_release_context(up, context)) + netdev_err(up->netdev, + "urb failed, failed to release context\n"); + } +} + +static void ucan_cleanup_rx_urbs(struct ucan_priv *up, struct urb **urbs) +{ + int i; + + for (i = 0; i < UCAN_MAX_RX_URBS; i++) { + if (urbs[i]) { + usb_unanchor_urb(urbs[i]); + usb_free_coherent(up->udev, + up->in_ep_size, + urbs[i]->transfer_buffer, + urbs[i]->transfer_dma); + usb_free_urb(urbs[i]); + } + } + + memset(urbs, 0, sizeof(*urbs) * UCAN_MAX_RX_URBS); +} + +static int ucan_prepare_and_anchor_rx_urbs(struct ucan_priv *up, + struct urb **urbs) +{ + int i; + + memset(urbs, 0, sizeof(*urbs) * UCAN_MAX_RX_URBS); + + for (i = 0; i < UCAN_MAX_RX_URBS; i++) { + void *buf; + + urbs[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!urbs[i]) + goto err; + + buf = usb_alloc_coherent(up->udev, + up->in_ep_size, + GFP_KERNEL, &urbs[i]->transfer_dma); + if (!buf) { + /* cleanup this urb */ + usb_free_urb(urbs[i]); + urbs[i] = NULL; + goto err; + } + + usb_fill_bulk_urb(urbs[i], up->udev, + usb_rcvbulkpipe(up->udev, + up->in_ep_addr), + buf, + up->in_ep_size, + ucan_read_bulk_callback, + up); + + urbs[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + usb_anchor_urb(urbs[i], &up->rx_urbs); + } + return 0; + +err: + /* cleanup other unsubmitted urbs */ + ucan_cleanup_rx_urbs(up, urbs); + return -ENOMEM; +} + +/* Submits rx urbs with the semantic: Either submit all, or cleanup + * everything. I case of errors submitted urbs are killed and all urbs in + * the array are freed. I case of no errors every entry in the urb + * array is set to NULL. + */ +static int ucan_submit_rx_urbs(struct ucan_priv *up, struct urb **urbs) +{ + int i, ret; + + /* Iterate over all urbs to submit. On success remove the urb + * from the list. + */ + for (i = 0; i < UCAN_MAX_RX_URBS; i++) { + ret = usb_submit_urb(urbs[i], GFP_KERNEL); + if (ret) { + netdev_err(up->netdev, + "could not submit urb; code: %d\n", + ret); + goto err; + } + + /* Anchor URB and drop reference, USB core will take + * care of freeing it + */ + usb_free_urb(urbs[i]); + urbs[i] = NULL; + } + return 0; + +err: + /* Cleanup unsubmitted urbs */ + ucan_cleanup_rx_urbs(up, urbs); + + /* Kill urbs that are already submitted */ + usb_kill_anchored_urbs(&up->rx_urbs); + + return ret; +} + +/* Open the network device */ +static int ucan_open(struct net_device *netdev) +{ + int ret, ret_cleanup; + u16 ctrlmode; + struct urb *urbs[UCAN_MAX_RX_URBS]; + struct ucan_priv *up = netdev_priv(netdev); + + ret = ucan_alloc_context_array(up); + if (ret) + return ret; + + /* Allocate and prepare IN URBS - allocated and anchored + * urbs are stored in urbs[] for clean + */ + ret = ucan_prepare_and_anchor_rx_urbs(up, urbs); + if (ret) + goto err_contexts; + + /* Check the control mode */ + ctrlmode = 0; + if (up->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) + ctrlmode |= UCAN_MODE_LOOPBACK; + if (up->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) + ctrlmode |= UCAN_MODE_SILENT; + if (up->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) + ctrlmode |= UCAN_MODE_3_SAMPLES; + if (up->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT) + ctrlmode |= UCAN_MODE_ONE_SHOT; + + /* Enable this in any case - filtering is down within the + * receive path + */ + ctrlmode |= UCAN_MODE_BERR_REPORT; + up->ctl_msg_buffer->cmd_start.mode = cpu_to_le16(ctrlmode); + + /* Driver is ready to receive data - start the USB device */ + ret = ucan_ctrl_command_out(up, UCAN_COMMAND_START, 0, 2); + if (ret < 0) { + netdev_err(up->netdev, + "could not start device, code: %d\n", + ret); + goto err_reset; + } + + /* Call CAN layer open */ + ret = open_candev(netdev); + if (ret) + goto err_stop; + + /* Driver is ready to receive data. Submit RX URBS */ + ret = ucan_submit_rx_urbs(up, urbs); + if (ret) + goto err_stop; + + up->can.state = CAN_STATE_ERROR_ACTIVE; + + /* Start the network queue */ + netif_start_queue(netdev); + + return 0; + +err_stop: + /* The device have started already stop it */ + ret_cleanup = ucan_ctrl_command_out(up, UCAN_COMMAND_STOP, 0, 0); + if (ret_cleanup < 0) + netdev_err(up->netdev, + "could not stop device, code: %d\n", + ret_cleanup); + +err_reset: + /* The device might have received data, reset it for + * consistent state + */ + ret_cleanup = ucan_ctrl_command_out(up, UCAN_COMMAND_RESET, 0, 0); + if (ret_cleanup < 0) + netdev_err(up->netdev, + "could not reset device, code: %d\n", + ret_cleanup); + + /* clean up unsubmitted urbs */ + ucan_cleanup_rx_urbs(up, urbs); + +err_contexts: + ucan_release_context_array(up); + return ret; +} + +static struct urb *ucan_prepare_tx_urb(struct ucan_priv *up, + struct ucan_urb_context *context, + struct can_frame *cf, + u8 echo_index) +{ + int mlen; + struct urb *urb; + struct ucan_message_out *m; + + /* create a URB, and a buffer for it, and copy the data to the URB */ + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + netdev_err(up->netdev, "no memory left for URBs\n"); + return NULL; + } + + m = usb_alloc_coherent(up->udev, + sizeof(struct ucan_message_out), + GFP_ATOMIC, + &urb->transfer_dma); + if (!m) { + netdev_err(up->netdev, "no memory left for USB buffer\n"); + usb_free_urb(urb); + return NULL; + } + + /* build the USB message */ + m->type = UCAN_OUT_TX; + m->msg.can_msg.id = cpu_to_le32(cf->can_id); + + if (cf->can_id & CAN_RTR_FLAG) { + mlen = UCAN_OUT_HDR_SIZE + + offsetof(struct ucan_can_msg, dlc) + + sizeof(m->msg.can_msg.dlc); + m->msg.can_msg.dlc = cf->can_dlc; + } else { + mlen = UCAN_OUT_HDR_SIZE + + sizeof(m->msg.can_msg.id) + cf->can_dlc; + memcpy(m->msg.can_msg.data, cf->data, cf->can_dlc); + } + m->len = cpu_to_le16(mlen); + + context->dlc = cf->can_dlc; + + m->subtype = echo_index; + + /* build the urb */ + usb_fill_bulk_urb(urb, up->udev, + usb_sndbulkpipe(up->udev, + up->out_ep_addr), + m, mlen, ucan_write_bulk_callback, context); + urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + return urb; +} + +static void ucan_clean_up_tx_urb(struct ucan_priv *up, struct urb *urb) +{ + usb_free_coherent(up->udev, sizeof(struct ucan_message_out), + urb->transfer_buffer, urb->transfer_dma); + usb_free_urb(urb); +} + +/* callback when Linux needs to send a can frame */ +static netdev_tx_t ucan_start_xmit(struct sk_buff *skb, + struct net_device *netdev) +{ + unsigned long flags; + int ret; + u8 echo_index; + struct urb *urb; + struct ucan_urb_context *context; + struct ucan_priv *up = netdev_priv(netdev); + struct can_frame *cf = (struct can_frame *)skb->data; + + /* check skb */ + if (can_dropped_invalid_skb(netdev, skb)) + return NETDEV_TX_OK; + + /* allocate a context and slow down tx path, if fifo state is low */ + context = ucan_alloc_context(up); + echo_index = context - up->context_array; + + if (WARN_ON_ONCE(!context)) + return NETDEV_TX_BUSY; + + /* prepare urb for transmission */ + urb = ucan_prepare_tx_urb(up, context, cf, echo_index); + if (!urb) + goto drop; + + /* put the skb on can loopback stack */ + spin_lock_irqsave(&up->echo_skb_lock, flags); + can_put_echo_skb(skb, up->netdev, echo_index); + spin_unlock_irqrestore(&up->echo_skb_lock, flags); + + /* transmit it */ + usb_anchor_urb(urb, &up->tx_urbs); + ret = usb_submit_urb(urb, GFP_ATOMIC); + + /* cleanup urb */ + if (ret) { + /* on error, clean up */ + usb_unanchor_urb(urb); + ucan_clean_up_tx_urb(up, urb); + if (!ucan_release_context(up, context)) + netdev_err(up->netdev, + "xmit err: failed to release context\n"); + + /* remove the skb from the echo stack - this also + * frees the skb + */ + spin_lock_irqsave(&up->echo_skb_lock, flags); + can_free_echo_skb(up->netdev, echo_index); + spin_unlock_irqrestore(&up->echo_skb_lock, flags); + + if (ret == -ENODEV) { + netif_device_detach(up->netdev); + } else { + netdev_warn(up->netdev, + "xmit err: failed to submit urb %d\n", + ret); + up->netdev->stats.tx_dropped++; + } + return NETDEV_TX_OK; + } + + netif_trans_update(netdev); + + /* release ref, as we do not need the urb anymore */ + usb_free_urb(urb); + + return NETDEV_TX_OK; + +drop: + if (!ucan_release_context(up, context)) + netdev_err(up->netdev, + "xmit drop: failed to release context\n"); + dev_kfree_skb(skb); + up->netdev->stats.tx_dropped++; + + return NETDEV_TX_OK; +} + +/* Device goes down + * + * Clean up used resources + */ +static int ucan_close(struct net_device *netdev) +{ + int ret; + struct ucan_priv *up = netdev_priv(netdev); + + up->can.state = CAN_STATE_STOPPED; + + /* stop sending data */ + usb_kill_anchored_urbs(&up->tx_urbs); + + /* stop receiving data */ + usb_kill_anchored_urbs(&up->rx_urbs); + + /* stop and reset can device */ + ret = ucan_ctrl_command_out(up, UCAN_COMMAND_STOP, 0, 0); + if (ret < 0) + netdev_err(up->netdev, + "could not stop device, code: %d\n", + ret); + + ret = ucan_ctrl_command_out(up, UCAN_COMMAND_RESET, 0, 0); + if (ret < 0) + netdev_err(up->netdev, + "could not reset device, code: %d\n", + ret); + + netif_stop_queue(netdev); + + ucan_release_context_array(up); + + close_candev(up->netdev); + return 0; +} + +/* CAN driver callbacks */ +static const struct net_device_ops ucan_netdev_ops = { + .ndo_open = ucan_open, + .ndo_stop = ucan_close, + .ndo_start_xmit = ucan_start_xmit, + .ndo_change_mtu = can_change_mtu, +}; + +/* Request to set bittiming + * + * This function generates an USB set bittiming message and transmits + * it to the device + */ +static int ucan_set_bittiming(struct net_device *netdev) +{ + int ret; + struct ucan_priv *up = netdev_priv(netdev); + struct ucan_ctl_cmd_set_bittiming *cmd_set_bittiming; + + cmd_set_bittiming = &up->ctl_msg_buffer->cmd_set_bittiming; + cmd_set_bittiming->tq = cpu_to_le32(up->can.bittiming.tq); + cmd_set_bittiming->brp = cpu_to_le16(up->can.bittiming.brp); + cmd_set_bittiming->sample_point = + cpu_to_le16(up->can.bittiming.sample_point); + cmd_set_bittiming->prop_seg = up->can.bittiming.prop_seg; + cmd_set_bittiming->phase_seg1 = up->can.bittiming.phase_seg1; + cmd_set_bittiming->phase_seg2 = up->can.bittiming.phase_seg2; + cmd_set_bittiming->sjw = up->can.bittiming.sjw; + + ret = ucan_ctrl_command_out(up, UCAN_COMMAND_SET_BITTIMING, 0, + sizeof(*cmd_set_bittiming)); + return (ret < 0) ? ret : 0; +} + +/* Restart the device to get it out of BUS-OFF state. + * Called when the user runs "ip link set can1 type can restart". + */ +static int ucan_set_mode(struct net_device *netdev, enum can_mode mode) +{ + int ret; + unsigned long flags; + struct ucan_priv *up = netdev_priv(netdev); + + switch (mode) { + case CAN_MODE_START: + netdev_dbg(up->netdev, "restarting device\n"); + + ret = ucan_ctrl_command_out(up, UCAN_COMMAND_RESTART, 0, 0); + up->can.state = CAN_STATE_ERROR_ACTIVE; + + /* check if queue can be restarted, + * up->available_tx_urbs must be protected by the + * lock + */ + spin_lock_irqsave(&up->context_lock, flags); + + if (up->available_tx_urbs > 0) + netif_wake_queue(up->netdev); + + spin_unlock_irqrestore(&up->context_lock, flags); + + return ret; + default: + return -EOPNOTSUPP; + } +} + +/* Probe the device, reset it and gather general device information */ +static int ucan_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + int ret; + int i; + u32 protocol_version; + struct usb_device *udev; + struct net_device *netdev; + struct usb_host_interface *iface_desc; + struct ucan_priv *up; + struct usb_endpoint_descriptor *ep; + u16 in_ep_size; + u16 out_ep_size; + u8 in_ep_addr; + u8 out_ep_addr; + union ucan_ctl_payload *ctl_msg_buffer; + char firmware_str[sizeof(union ucan_ctl_payload) + 1]; + + udev = interface_to_usbdev(intf); + + /* Stage 1 - Interface Parsing + * --------------------------- + * + * Identifie the device USB interface descriptor and its + * endpoints. Probing is aborted on errors. + */ + + /* check if the interface is sane */ + iface_desc = intf->cur_altsetting; + if (!iface_desc) + return -ENODEV; + + dev_info(&udev->dev, + "%s: probing device on interface #%d\n", + UCAN_DRIVER_NAME, + iface_desc->desc.bInterfaceNumber); + + /* interface sanity check */ + if (iface_desc->desc.bNumEndpoints != 2) { + dev_err(&udev->dev, + "%s: invalid EP count (%d)", + UCAN_DRIVER_NAME, iface_desc->desc.bNumEndpoints); + goto err_firmware_needs_update; + } + + /* check interface endpoints */ + in_ep_addr = 0; + out_ep_addr = 0; + in_ep_size = 0; + out_ep_size = 0; + for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) { + ep = &iface_desc->endpoint[i].desc; + + if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != 0) && + ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == + USB_ENDPOINT_XFER_BULK)) { + /* In Endpoint */ + in_ep_addr = ep->bEndpointAddress; + in_ep_addr &= USB_ENDPOINT_NUMBER_MASK; + in_ep_size = le16_to_cpu(ep->wMaxPacketSize); + } else if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == + 0) && + ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == + USB_ENDPOINT_XFER_BULK)) { + /* Out Endpoint */ + out_ep_addr = ep->bEndpointAddress; + out_ep_addr &= USB_ENDPOINT_NUMBER_MASK; + out_ep_size = le16_to_cpu(ep->wMaxPacketSize); + } + } + + /* check if interface is sane */ + if (!in_ep_addr || !out_ep_addr) { + dev_err(&udev->dev, "%s: invalid endpoint configuration\n", + UCAN_DRIVER_NAME); + goto err_firmware_needs_update; + } + if (in_ep_size < sizeof(struct ucan_message_in)) { + dev_err(&udev->dev, "%s: invalid in_ep MaxPacketSize\n", + UCAN_DRIVER_NAME); + goto err_firmware_needs_update; + } + if (out_ep_size < sizeof(struct ucan_message_out)) { + dev_err(&udev->dev, "%s: invalid out_ep MaxPacketSize\n", + UCAN_DRIVER_NAME); + goto err_firmware_needs_update; + } + + /* Stage 2 - Device Identification + * ------------------------------- + * + * The device interface seems to be a ucan device. Do further + * compatibility checks. On error probing is aborted, on + * success this stage leaves the ctl_msg_buffer with the + * reported contents of a GET_INFO command (supported + * bittimings, tx_fifo depth). This information is used in + * Stage 3 for the final driver initialisation. + */ + + /* Prepare Memory for control transferes */ + ctl_msg_buffer = devm_kzalloc(&udev->dev, + sizeof(union ucan_ctl_payload), + GFP_KERNEL); + if (!ctl_msg_buffer) { + dev_err(&udev->dev, + "%s: failed to allocate control pipe memory\n", + UCAN_DRIVER_NAME); + return -ENOMEM; + } + + /* get protocol version + * + * note: ucan_ctrl_command_* wrappers cannot be used yet + * because `up` is initialised in Stage 3 + */ + ret = usb_control_msg(udev, + usb_rcvctrlpipe(udev, 0), + UCAN_COMMAND_GET, + USB_DIR_IN | USB_TYPE_VENDOR | + USB_RECIP_INTERFACE, + UCAN_COMMAND_GET_PROTOCOL_VERSION, + iface_desc->desc.bInterfaceNumber, + ctl_msg_buffer, + sizeof(union ucan_ctl_payload), + UCAN_USB_CTL_PIPE_TIMEOUT); + + /* older firmware version do not support this command - those + * are not supported by this drive + */ + if (ret != 4) { + dev_err(&udev->dev, + "%s: could not read protocol version, ret=%d\n", + UCAN_DRIVER_NAME, ret); + if (ret >= 0) + ret = -EINVAL; + goto err_firmware_needs_update; + } + + /* this driver currently supports protocol version 3 only */ + protocol_version = + le32_to_cpu(ctl_msg_buffer->cmd_get_protocol_version.version); + if (protocol_version < UCAN_PROTOCOL_VERSION_MIN || + protocol_version > UCAN_PROTOCOL_VERSION_MAX) { + dev_err(&udev->dev, + "%s: device protocol version %d is not supported\n", + UCAN_DRIVER_NAME, protocol_version); + goto err_firmware_needs_update; + } + + /* request the device information and store it in ctl_msg_buffer + * + * note: ucan_ctrl_command_* wrappers connot be used yet + * because `up` is initialised in Stage 3 + */ + ret = usb_control_msg(udev, + usb_rcvctrlpipe(udev, 0), + UCAN_COMMAND_GET, + USB_DIR_IN | USB_TYPE_VENDOR | + USB_RECIP_INTERFACE, + UCAN_COMMAND_GET_INFO, + iface_desc->desc.bInterfaceNumber, + ctl_msg_buffer, + sizeof(ctl_msg_buffer->cmd_get_device_info), + UCAN_USB_CTL_PIPE_TIMEOUT); + + if (ret < 0) { + dev_err(&udev->dev, "%s: failed to retrieve device info\n", + UCAN_DRIVER_NAME); + goto err_firmware_needs_update; + } + if (ret < sizeof(ctl_msg_buffer->cmd_get_device_info)) { + dev_err(&udev->dev, "%s: device reported invalid device info\n", + UCAN_DRIVER_NAME); + goto err_firmware_needs_update; + } + if (ctl_msg_buffer->cmd_get_device_info.tx_fifo == 0) { + dev_err(&udev->dev, + "%s: device reported invalid tx-fifo size\n", + UCAN_DRIVER_NAME); + goto err_firmware_needs_update; + } + + /* Stage 3 - Driver Initialisation + * ------------------------------- + * + * Register device to Linux, prepare private structures and + * reset the device. + */ + + /* allocate driver resources */ + netdev = alloc_candev(sizeof(struct ucan_priv), + ctl_msg_buffer->cmd_get_device_info.tx_fifo); + if (!netdev) { + dev_err(&udev->dev, + "%s: cannot allocate candev\n", UCAN_DRIVER_NAME); + return -ENOMEM; + } + + up = netdev_priv(netdev); + + /* initialze data */ + up->udev = udev; + up->intf = intf; + up->netdev = netdev; + up->intf_index = iface_desc->desc.bInterfaceNumber; + up->in_ep_addr = in_ep_addr; + up->out_ep_addr = out_ep_addr; + up->in_ep_size = in_ep_size; + up->ctl_msg_buffer = ctl_msg_buffer; + up->context_array = NULL; + up->available_tx_urbs = 0; + + up->can.state = CAN_STATE_STOPPED; + up->can.bittiming_const = &up->device_info.bittiming_const; + up->can.do_set_bittiming = ucan_set_bittiming; + up->can.do_set_mode = &ucan_set_mode; + spin_lock_init(&up->context_lock); + spin_lock_init(&up->echo_skb_lock); + netdev->netdev_ops = &ucan_netdev_ops; + + usb_set_intfdata(intf, up); + SET_NETDEV_DEV(netdev, &intf->dev); + + /* parse device information + * the data retrieved in Stage 2 is still available in + * up->ctl_msg_buffer + */ + ucan_parse_device_info(up, &ctl_msg_buffer->cmd_get_device_info); + + /* just print some device information - if available */ + ret = ucan_device_request_in(up, UCAN_DEVICE_GET_FW_STRING, 0, + sizeof(union ucan_ctl_payload)); + if (ret > 0) { + /* copy string while ensuring zero terminiation */ + strncpy(firmware_str, up->ctl_msg_buffer->raw, + sizeof(union ucan_ctl_payload)); + firmware_str[sizeof(union ucan_ctl_payload)] = '\0'; + } else { + strcpy(firmware_str, "unknown"); + } + + /* device is compatible, reset it */ + ret = ucan_ctrl_command_out(up, UCAN_COMMAND_RESET, 0, 0); + if (ret < 0) + goto err_free_candev; + + init_usb_anchor(&up->rx_urbs); + init_usb_anchor(&up->tx_urbs); + + up->can.state = CAN_STATE_STOPPED; + + /* register the device */ + ret = register_candev(netdev); + if (ret) + goto err_free_candev; + + /* initialisation complete, log device info */ + netdev_info(up->netdev, "registered device\n"); + netdev_info(up->netdev, "firmware string: %s\n", firmware_str); + + /* success */ + return 0; + +err_free_candev: + free_candev(netdev); + return ret; + +err_firmware_needs_update: + dev_err(&udev->dev, + "%s: probe failed; try to update the device firmware\n", + UCAN_DRIVER_NAME); + return -ENODEV; +} + +/* disconnect the device */ +static void ucan_disconnect(struct usb_interface *intf) +{ + struct usb_device *udev; + struct ucan_priv *up = usb_get_intfdata(intf); + + udev = interface_to_usbdev(intf); + + usb_set_intfdata(intf, NULL); + + if (up) { + unregister_netdev(up->netdev); + free_candev(up->netdev); + } +} + +static struct usb_device_id ucan_table[] = { + /* Mule (soldered onto compute modules) */ + {USB_DEVICE_INTERFACE_NUMBER(0x2294, 0x425a, 0)}, + /* Seal (standalone USB stick) */ + {USB_DEVICE_INTERFACE_NUMBER(0x2294, 0x425b, 0)}, + {} /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, ucan_table); +/* driver callbacks */ +static struct usb_driver ucan_driver = { + .name = UCAN_DRIVER_NAME, + .probe = ucan_probe, + .disconnect = ucan_disconnect, + .id_table = ucan_table, +}; + +module_usb_driver(ucan_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Martin Elshuber <martin.elshuber@theobroma-systems.com>"); +MODULE_AUTHOR("Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>"); +MODULE_DESCRIPTION("Driver for Theobroma Systems UCAN devices"); diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index 5a24039733ef..045f0845e665 100644 --- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -2,7 +2,7 @@ * * Copyright (C) 2012 - 2014 Xilinx, Inc. * Copyright (C) 2009 PetaLogix. All rights reserved. - * Copyright (C) 2017 Sandvik Mining and Construction Oy + * Copyright (C) 2017 - 2018 Sandvik Mining and Construction Oy * * Description: * This driver is developed for Axi CAN IP and for Zynq CANPS Controller. @@ -51,16 +51,34 @@ enum xcan_reg { XCAN_ISR_OFFSET = 0x1C, /* Interrupt status */ XCAN_IER_OFFSET = 0x20, /* Interrupt enable */ XCAN_ICR_OFFSET = 0x24, /* Interrupt clear */ - XCAN_TXFIFO_ID_OFFSET = 0x30,/* TX FIFO ID */ - XCAN_TXFIFO_DLC_OFFSET = 0x34, /* TX FIFO DLC */ - XCAN_TXFIFO_DW1_OFFSET = 0x38, /* TX FIFO Data Word 1 */ - XCAN_TXFIFO_DW2_OFFSET = 0x3C, /* TX FIFO Data Word 2 */ - XCAN_RXFIFO_ID_OFFSET = 0x50, /* RX FIFO ID */ - XCAN_RXFIFO_DLC_OFFSET = 0x54, /* RX FIFO DLC */ - XCAN_RXFIFO_DW1_OFFSET = 0x58, /* RX FIFO Data Word 1 */ - XCAN_RXFIFO_DW2_OFFSET = 0x5C, /* RX FIFO Data Word 2 */ + + /* not on CAN FD cores */ + XCAN_TXFIFO_OFFSET = 0x30, /* TX FIFO base */ + XCAN_RXFIFO_OFFSET = 0x50, /* RX FIFO base */ + XCAN_AFR_OFFSET = 0x60, /* Acceptance Filter */ + + /* only on CAN FD cores */ + XCAN_TRR_OFFSET = 0x0090, /* TX Buffer Ready Request */ + XCAN_AFR_EXT_OFFSET = 0x00E0, /* Acceptance Filter */ + XCAN_FSR_OFFSET = 0x00E8, /* RX FIFO Status */ + XCAN_TXMSG_BASE_OFFSET = 0x0100, /* TX Message Space */ + XCAN_RXMSG_BASE_OFFSET = 0x1100, /* RX Message Space */ }; +#define XCAN_FRAME_ID_OFFSET(frame_base) ((frame_base) + 0x00) +#define XCAN_FRAME_DLC_OFFSET(frame_base) ((frame_base) + 0x04) +#define XCAN_FRAME_DW1_OFFSET(frame_base) ((frame_base) + 0x08) +#define XCAN_FRAME_DW2_OFFSET(frame_base) ((frame_base) + 0x0C) + +#define XCAN_CANFD_FRAME_SIZE 0x48 +#define XCAN_TXMSG_FRAME_OFFSET(n) (XCAN_TXMSG_BASE_OFFSET + \ + XCAN_CANFD_FRAME_SIZE * (n)) +#define XCAN_RXMSG_FRAME_OFFSET(n) (XCAN_RXMSG_BASE_OFFSET + \ + XCAN_CANFD_FRAME_SIZE * (n)) + +/* the single TX mailbox used by this driver on CAN FD HW */ +#define XCAN_TX_MAILBOX_IDX 0 + /* CAN register bit masks - XCAN_<REG>_<BIT>_MASK */ #define XCAN_SRR_CEN_MASK 0x00000002 /* CAN enable */ #define XCAN_SRR_RESET_MASK 0x00000001 /* Soft Reset the CAN core */ @@ -70,6 +88,9 @@ enum xcan_reg { #define XCAN_BTR_SJW_MASK 0x00000180 /* Synchronous jump width */ #define XCAN_BTR_TS2_MASK 0x00000070 /* Time segment 2 */ #define XCAN_BTR_TS1_MASK 0x0000000F /* Time segment 1 */ +#define XCAN_BTR_SJW_MASK_CANFD 0x000F0000 /* Synchronous jump width */ +#define XCAN_BTR_TS2_MASK_CANFD 0x00000F00 /* Time segment 2 */ +#define XCAN_BTR_TS1_MASK_CANFD 0x0000003F /* Time segment 1 */ #define XCAN_ECR_REC_MASK 0x0000FF00 /* Receive error counter */ #define XCAN_ECR_TEC_MASK 0x000000FF /* Transmit error counter */ #define XCAN_ESR_ACKER_MASK 0x00000010 /* ACK error */ @@ -83,6 +104,7 @@ enum xcan_reg { #define XCAN_SR_NORMAL_MASK 0x00000008 /* Normal mode */ #define XCAN_SR_LBACK_MASK 0x00000002 /* Loop back mode */ #define XCAN_SR_CONFIG_MASK 0x00000001 /* Configuration mode */ +#define XCAN_IXR_RXMNF_MASK 0x00020000 /* RX match not finished */ #define XCAN_IXR_TXFEMP_MASK 0x00004000 /* TX FIFO Empty */ #define XCAN_IXR_WKUP_MASK 0x00000800 /* Wake up interrupt */ #define XCAN_IXR_SLP_MASK 0x00000400 /* Sleep interrupt */ @@ -100,15 +122,15 @@ enum xcan_reg { #define XCAN_IDR_ID2_MASK 0x0007FFFE /* Extended message ident */ #define XCAN_IDR_RTR_MASK 0x00000001 /* Remote TX request */ #define XCAN_DLCR_DLC_MASK 0xF0000000 /* Data length code */ - -#define XCAN_INTR_ALL (XCAN_IXR_TXOK_MASK | XCAN_IXR_BSOFF_MASK |\ - XCAN_IXR_WKUP_MASK | XCAN_IXR_SLP_MASK | \ - XCAN_IXR_RXNEMP_MASK | XCAN_IXR_ERROR_MASK | \ - XCAN_IXR_RXOFLW_MASK | XCAN_IXR_ARBLST_MASK) +#define XCAN_FSR_FL_MASK 0x00003F00 /* RX Fill Level */ +#define XCAN_FSR_IRI_MASK 0x00000080 /* RX Increment Read Index */ +#define XCAN_FSR_RI_MASK 0x0000001F /* RX Read Index */ /* CAN register bit shift - XCAN_<REG>_<BIT>_SHIFT */ #define XCAN_BTR_SJW_SHIFT 7 /* Synchronous jump width */ #define XCAN_BTR_TS2_SHIFT 4 /* Time segment 2 */ +#define XCAN_BTR_SJW_SHIFT_CANFD 16 /* Synchronous jump width */ +#define XCAN_BTR_TS2_SHIFT_CANFD 8 /* Time segment 2 */ #define XCAN_IDR_ID1_SHIFT 21 /* Standard Messg Identifier */ #define XCAN_IDR_ID2_SHIFT 1 /* Extended Message Identifier */ #define XCAN_DLCR_DLC_SHIFT 28 /* Data length code */ @@ -118,6 +140,27 @@ enum xcan_reg { #define XCAN_FRAME_MAX_DATA_LEN 8 #define XCAN_TIMEOUT (1 * HZ) +/* TX-FIFO-empty interrupt available */ +#define XCAN_FLAG_TXFEMP 0x0001 +/* RX Match Not Finished interrupt available */ +#define XCAN_FLAG_RXMNF 0x0002 +/* Extended acceptance filters with control at 0xE0 */ +#define XCAN_FLAG_EXT_FILTERS 0x0004 +/* TX mailboxes instead of TX FIFO */ +#define XCAN_FLAG_TX_MAILBOXES 0x0008 +/* RX FIFO with each buffer in separate registers at 0x1100 + * instead of the regular FIFO at 0x50 + */ +#define XCAN_FLAG_RX_FIFO_MULTI 0x0010 + +struct xcan_devtype_data { + unsigned int flags; + const struct can_bittiming_const *bittiming_const; + const char *bus_clk_name; + unsigned int btr_ts2_shift; + unsigned int btr_sjw_shift; +}; + /** * struct xcan_priv - This definition define CAN driver instance * @can: CAN private data structure. @@ -133,6 +176,7 @@ enum xcan_reg { * @irq_flags: For request_irq() * @bus_clk: Pointer to struct clk * @can_clk: Pointer to struct clk + * @devtype: Device type specific constants */ struct xcan_priv { struct can_priv can; @@ -149,6 +193,7 @@ struct xcan_priv { unsigned long irq_flags; struct clk *bus_clk; struct clk *can_clk; + struct xcan_devtype_data devtype; }; /* CAN Bittiming constants as per Xilinx CAN specs */ @@ -164,9 +209,16 @@ static const struct can_bittiming_const xcan_bittiming_const = { .brp_inc = 1, }; -#define XCAN_CAP_WATERMARK 0x0001 -struct xcan_devtype_data { - unsigned int caps; +static const struct can_bittiming_const xcan_bittiming_const_canfd = { + .name = DRIVER_NAME, + .tseg1_min = 1, + .tseg1_max = 64, + .tseg2_min = 1, + .tseg2_max = 16, + .sjw_max = 16, + .brp_min = 1, + .brp_max = 256, + .brp_inc = 1, }; /** @@ -224,6 +276,23 @@ static u32 xcan_read_reg_be(const struct xcan_priv *priv, enum xcan_reg reg) } /** + * xcan_rx_int_mask - Get the mask for the receive interrupt + * @priv: Driver private data structure + * + * Return: The receive interrupt mask used by the driver on this HW + */ +static u32 xcan_rx_int_mask(const struct xcan_priv *priv) +{ + /* RXNEMP is better suited for our use case as it cannot be cleared + * while the FIFO is non-empty, but CAN FD HW does not have it + */ + if (priv->devtype.flags & XCAN_FLAG_RX_FIFO_MULTI) + return XCAN_IXR_RXOK_MASK; + else + return XCAN_IXR_RXNEMP_MASK; +} + +/** * set_reset_mode - Resets the CAN device mode * @ndev: Pointer to net_device structure * @@ -287,10 +356,10 @@ static int xcan_set_bittiming(struct net_device *ndev) btr1 = (bt->prop_seg + bt->phase_seg1 - 1); /* Setting Time Segment 2 in BTR Register */ - btr1 |= (bt->phase_seg2 - 1) << XCAN_BTR_TS2_SHIFT; + btr1 |= (bt->phase_seg2 - 1) << priv->devtype.btr_ts2_shift; /* Setting Synchronous jump width in BTR Register */ - btr1 |= (bt->sjw - 1) << XCAN_BTR_SJW_SHIFT; + btr1 |= (bt->sjw - 1) << priv->devtype.btr_sjw_shift; priv->write_reg(priv, XCAN_BRPR_OFFSET, btr0); priv->write_reg(priv, XCAN_BTR_OFFSET, btr1); @@ -318,6 +387,7 @@ static int xcan_chip_start(struct net_device *ndev) u32 reg_msr, reg_sr_mask; int err; unsigned long timeout; + u32 ier; /* Check if it is in reset mode */ err = set_reset_mode(ndev); @@ -329,7 +399,15 @@ static int xcan_chip_start(struct net_device *ndev) return err; /* Enable interrupts */ - priv->write_reg(priv, XCAN_IER_OFFSET, XCAN_INTR_ALL); + ier = XCAN_IXR_TXOK_MASK | XCAN_IXR_BSOFF_MASK | + XCAN_IXR_WKUP_MASK | XCAN_IXR_SLP_MASK | + XCAN_IXR_ERROR_MASK | XCAN_IXR_RXOFLW_MASK | + XCAN_IXR_ARBLST_MASK | xcan_rx_int_mask(priv); + + if (priv->devtype.flags & XCAN_FLAG_RXMNF) + ier |= XCAN_IXR_RXMNF_MASK; + + priv->write_reg(priv, XCAN_IER_OFFSET, ier); /* Check whether it is loopback mode or normal mode */ if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) { @@ -340,6 +418,12 @@ static int xcan_chip_start(struct net_device *ndev) reg_sr_mask = XCAN_SR_NORMAL_MASK; } + /* enable the first extended filter, if any, as cores with extended + * filtering default to non-receipt if all filters are disabled + */ + if (priv->devtype.flags & XCAN_FLAG_EXT_FILTERS) + priv->write_reg(priv, XCAN_AFR_EXT_OFFSET, 0x00000001); + priv->write_reg(priv, XCAN_MSR_OFFSET, reg_msr); priv->write_reg(priv, XCAN_SRR_OFFSET, XCAN_SRR_CEN_MASK); @@ -390,34 +474,15 @@ static int xcan_do_set_mode(struct net_device *ndev, enum can_mode mode) } /** - * xcan_start_xmit - Starts the transmission - * @skb: sk_buff pointer that contains data to be Txed - * @ndev: Pointer to net_device structure - * - * This function is invoked from upper layers to initiate transmission. This - * function uses the next available free txbuff and populates their fields to - * start the transmission. - * - * Return: 0 on success and failure value on error + * xcan_write_frame - Write a frame to HW + * @skb: sk_buff pointer that contains data to be Txed + * @frame_offset: Register offset to write the frame to */ -static int xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev) +static void xcan_write_frame(struct xcan_priv *priv, struct sk_buff *skb, + int frame_offset) { - struct xcan_priv *priv = netdev_priv(ndev); - struct net_device_stats *stats = &ndev->stats; - struct can_frame *cf = (struct can_frame *)skb->data; u32 id, dlc, data[2] = {0, 0}; - unsigned long flags; - - if (can_dropped_invalid_skb(ndev, skb)) - return NETDEV_TX_OK; - - /* Check if the TX buffer is full */ - if (unlikely(priv->read_reg(priv, XCAN_SR_OFFSET) & - XCAN_SR_TXFLL_MASK)) { - netif_stop_queue(ndev); - netdev_err(ndev, "BUG!, TX FIFO full when queue awake!\n"); - return NETDEV_TX_BUSY; - } + struct can_frame *cf = (struct can_frame *)skb->data; /* Watch carefully on the bit sequence */ if (cf->can_id & CAN_EFF_FLAG) { @@ -453,24 +518,44 @@ static int xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev) if (cf->can_dlc > 4) data[1] = be32_to_cpup((__be32 *)(cf->data + 4)); + priv->write_reg(priv, XCAN_FRAME_ID_OFFSET(frame_offset), id); + /* If the CAN frame is RTR frame this write triggers transmission + * (not on CAN FD) + */ + priv->write_reg(priv, XCAN_FRAME_DLC_OFFSET(frame_offset), dlc); + if (!(cf->can_id & CAN_RTR_FLAG)) { + priv->write_reg(priv, XCAN_FRAME_DW1_OFFSET(frame_offset), + data[0]); + /* If the CAN frame is Standard/Extended frame this + * write triggers transmission (not on CAN FD) + */ + priv->write_reg(priv, XCAN_FRAME_DW2_OFFSET(frame_offset), + data[1]); + } +} + +/** + * xcan_start_xmit_fifo - Starts the transmission (FIFO mode) + * + * Return: 0 on success, -ENOSPC if FIFO is full. + */ +static int xcan_start_xmit_fifo(struct sk_buff *skb, struct net_device *ndev) +{ + struct xcan_priv *priv = netdev_priv(ndev); + unsigned long flags; + + /* Check if the TX buffer is full */ + if (unlikely(priv->read_reg(priv, XCAN_SR_OFFSET) & + XCAN_SR_TXFLL_MASK)) + return -ENOSPC; + can_put_echo_skb(skb, ndev, priv->tx_head % priv->tx_max); spin_lock_irqsave(&priv->tx_lock, flags); priv->tx_head++; - /* Write the Frame to Xilinx CAN TX FIFO */ - priv->write_reg(priv, XCAN_TXFIFO_ID_OFFSET, id); - /* If the CAN frame is RTR frame this write triggers tranmission */ - priv->write_reg(priv, XCAN_TXFIFO_DLC_OFFSET, dlc); - if (!(cf->can_id & CAN_RTR_FLAG)) { - priv->write_reg(priv, XCAN_TXFIFO_DW1_OFFSET, data[0]); - /* If the CAN frame is Standard/Extended frame this - * write triggers tranmission - */ - priv->write_reg(priv, XCAN_TXFIFO_DW2_OFFSET, data[1]); - stats->tx_bytes += cf->can_dlc; - } + xcan_write_frame(priv, skb, XCAN_TXFIFO_OFFSET); /* Clear TX-FIFO-empty interrupt for xcan_tx_interrupt() */ if (priv->tx_max > 1) @@ -482,6 +567,70 @@ static int xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev) spin_unlock_irqrestore(&priv->tx_lock, flags); + return 0; +} + +/** + * xcan_start_xmit_mailbox - Starts the transmission (mailbox mode) + * + * Return: 0 on success, -ENOSPC if there is no space + */ +static int xcan_start_xmit_mailbox(struct sk_buff *skb, struct net_device *ndev) +{ + struct xcan_priv *priv = netdev_priv(ndev); + unsigned long flags; + + if (unlikely(priv->read_reg(priv, XCAN_TRR_OFFSET) & + BIT(XCAN_TX_MAILBOX_IDX))) + return -ENOSPC; + + can_put_echo_skb(skb, ndev, 0); + + spin_lock_irqsave(&priv->tx_lock, flags); + + priv->tx_head++; + + xcan_write_frame(priv, skb, + XCAN_TXMSG_FRAME_OFFSET(XCAN_TX_MAILBOX_IDX)); + + /* Mark buffer as ready for transmit */ + priv->write_reg(priv, XCAN_TRR_OFFSET, BIT(XCAN_TX_MAILBOX_IDX)); + + netif_stop_queue(ndev); + + spin_unlock_irqrestore(&priv->tx_lock, flags); + + return 0; +} + +/** + * xcan_start_xmit - Starts the transmission + * @skb: sk_buff pointer that contains data to be Txed + * @ndev: Pointer to net_device structure + * + * This function is invoked from upper layers to initiate transmission. + * + * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY when the tx queue is full + */ +static int xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct xcan_priv *priv = netdev_priv(ndev); + int ret; + + if (can_dropped_invalid_skb(ndev, skb)) + return NETDEV_TX_OK; + + if (priv->devtype.flags & XCAN_FLAG_TX_MAILBOXES) + ret = xcan_start_xmit_mailbox(skb, ndev); + else + ret = xcan_start_xmit_fifo(skb, ndev); + + if (ret < 0) { + netdev_err(ndev, "BUG!, TX full when queue awake!\n"); + netif_stop_queue(ndev); + return NETDEV_TX_BUSY; + } + return NETDEV_TX_OK; } @@ -489,13 +638,14 @@ static int xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev) * xcan_rx - Is called from CAN isr to complete the received * frame processing * @ndev: Pointer to net_device structure + * @frame_base: Register offset to the frame to be read * * This function is invoked from the CAN isr(poll) to process the Rx frames. It * does minimal processing and invokes "netif_receive_skb" to complete further * processing. * Return: 1 on success and 0 on failure. */ -static int xcan_rx(struct net_device *ndev) +static int xcan_rx(struct net_device *ndev, int frame_base) { struct xcan_priv *priv = netdev_priv(ndev); struct net_device_stats *stats = &ndev->stats; @@ -510,9 +660,9 @@ static int xcan_rx(struct net_device *ndev) } /* Read a frame from Xilinx zynq CANPS */ - id_xcan = priv->read_reg(priv, XCAN_RXFIFO_ID_OFFSET); - dlc = priv->read_reg(priv, XCAN_RXFIFO_DLC_OFFSET) >> - XCAN_DLCR_DLC_SHIFT; + id_xcan = priv->read_reg(priv, XCAN_FRAME_ID_OFFSET(frame_base)); + dlc = priv->read_reg(priv, XCAN_FRAME_DLC_OFFSET(frame_base)) >> + XCAN_DLCR_DLC_SHIFT; /* Change Xilinx CAN data length format to socketCAN data format */ cf->can_dlc = get_can_dlc(dlc); @@ -535,8 +685,8 @@ static int xcan_rx(struct net_device *ndev) } /* DW1/DW2 must always be read to remove message from RXFIFO */ - data[0] = priv->read_reg(priv, XCAN_RXFIFO_DW1_OFFSET); - data[1] = priv->read_reg(priv, XCAN_RXFIFO_DW2_OFFSET); + data[0] = priv->read_reg(priv, XCAN_FRAME_DW1_OFFSET(frame_base)); + data[1] = priv->read_reg(priv, XCAN_FRAME_DW2_OFFSET(frame_base)); if (!(cf->can_id & CAN_RTR_FLAG)) { /* Change Xilinx CAN data format to socketCAN data format */ @@ -594,39 +744,19 @@ static void xcan_set_error_state(struct net_device *ndev, u32 ecr = priv->read_reg(priv, XCAN_ECR_OFFSET); u32 txerr = ecr & XCAN_ECR_TEC_MASK; u32 rxerr = (ecr & XCAN_ECR_REC_MASK) >> XCAN_ESR_REC_SHIFT; + enum can_state tx_state = txerr >= rxerr ? new_state : 0; + enum can_state rx_state = txerr <= rxerr ? new_state : 0; + + /* non-ERROR states are handled elsewhere */ + if (WARN_ON(new_state > CAN_STATE_ERROR_PASSIVE)) + return; - priv->can.state = new_state; + can_change_state(ndev, cf, tx_state, rx_state); if (cf) { - cf->can_id |= CAN_ERR_CRTL; cf->data[6] = txerr; cf->data[7] = rxerr; } - - switch (new_state) { - case CAN_STATE_ERROR_PASSIVE: - priv->can.can_stats.error_passive++; - if (cf) - cf->data[1] = (rxerr > 127) ? - CAN_ERR_CRTL_RX_PASSIVE : - CAN_ERR_CRTL_TX_PASSIVE; - break; - case CAN_STATE_ERROR_WARNING: - priv->can.can_stats.error_warning++; - if (cf) - cf->data[1] |= (txerr > rxerr) ? - CAN_ERR_CRTL_TX_WARNING : - CAN_ERR_CRTL_RX_WARNING; - break; - case CAN_STATE_ERROR_ACTIVE: - if (cf) - cf->data[1] |= CAN_ERR_CRTL_ACTIVE; - break; - default: - /* non-ERROR states are handled elsewhere */ - WARN_ON(1); - break; - } } /** @@ -703,7 +833,8 @@ static void xcan_err_interrupt(struct net_device *ndev, u32 isr) } else { enum can_state new_state = xcan_current_error_state(ndev); - xcan_set_error_state(ndev, new_state, skb ? cf : NULL); + if (new_state != priv->can.state) + xcan_set_error_state(ndev, new_state, skb ? cf : NULL); } /* Check for Arbitration lost interrupt */ @@ -725,6 +856,17 @@ static void xcan_err_interrupt(struct net_device *ndev, u32 isr) } } + /* Check for RX Match Not Finished interrupt */ + if (isr & XCAN_IXR_RXMNF_MASK) { + stats->rx_dropped++; + stats->rx_errors++; + netdev_err(ndev, "RX match not finished, frame discarded\n"); + if (skb) { + cf->can_id |= CAN_ERR_CRTL; + cf->data[1] |= CAN_ERR_CRTL_UNSPEC; + } + } + /* Check for error interrupt */ if (isr & XCAN_IXR_ERROR_MASK) { if (skb) @@ -809,6 +951,44 @@ static void xcan_state_interrupt(struct net_device *ndev, u32 isr) } /** + * xcan_rx_fifo_get_next_frame - Get register offset of next RX frame + * + * Return: Register offset of the next frame in RX FIFO. + */ +static int xcan_rx_fifo_get_next_frame(struct xcan_priv *priv) +{ + int offset; + + if (priv->devtype.flags & XCAN_FLAG_RX_FIFO_MULTI) { + u32 fsr; + + /* clear RXOK before the is-empty check so that any newly + * received frame will reassert it without a race + */ + priv->write_reg(priv, XCAN_ICR_OFFSET, XCAN_IXR_RXOK_MASK); + + fsr = priv->read_reg(priv, XCAN_FSR_OFFSET); + + /* check if RX FIFO is empty */ + if (!(fsr & XCAN_FSR_FL_MASK)) + return -ENOENT; + + offset = XCAN_RXMSG_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK); + + } else { + /* check if RX FIFO is empty */ + if (!(priv->read_reg(priv, XCAN_ISR_OFFSET) & + XCAN_IXR_RXNEMP_MASK)) + return -ENOENT; + + /* frames are read from a static offset */ + offset = XCAN_RXFIFO_OFFSET; + } + + return offset; +} + +/** * xcan_rx_poll - Poll routine for rx packets (NAPI) * @napi: napi structure pointer * @quota: Max number of rx packets to be processed. @@ -822,14 +1002,24 @@ static int xcan_rx_poll(struct napi_struct *napi, int quota) { struct net_device *ndev = napi->dev; struct xcan_priv *priv = netdev_priv(ndev); - u32 isr, ier; + u32 ier; int work_done = 0; - - isr = priv->read_reg(priv, XCAN_ISR_OFFSET); - while ((isr & XCAN_IXR_RXNEMP_MASK) && (work_done < quota)) { - work_done += xcan_rx(ndev); - priv->write_reg(priv, XCAN_ICR_OFFSET, XCAN_IXR_RXNEMP_MASK); - isr = priv->read_reg(priv, XCAN_ISR_OFFSET); + int frame_offset; + + while ((frame_offset = xcan_rx_fifo_get_next_frame(priv)) >= 0 && + (work_done < quota)) { + work_done += xcan_rx(ndev, frame_offset); + + if (priv->devtype.flags & XCAN_FLAG_RX_FIFO_MULTI) + /* increment read index */ + priv->write_reg(priv, XCAN_FSR_OFFSET, + XCAN_FSR_IRI_MASK); + else + /* clear rx-not-empty (will actually clear only if + * empty) + */ + priv->write_reg(priv, XCAN_ICR_OFFSET, + XCAN_IXR_RXNEMP_MASK); } if (work_done) { @@ -840,7 +1030,7 @@ static int xcan_rx_poll(struct napi_struct *napi, int quota) if (work_done < quota) { napi_complete_done(napi, work_done); ier = priv->read_reg(priv, XCAN_IER_OFFSET); - ier |= XCAN_IXR_RXNEMP_MASK; + ier |= xcan_rx_int_mask(priv); priv->write_reg(priv, XCAN_IER_OFFSET, ier); } return work_done; @@ -908,8 +1098,8 @@ static void xcan_tx_interrupt(struct net_device *ndev, u32 isr) } while (frames_sent--) { - can_get_echo_skb(ndev, priv->tx_tail % - priv->tx_max); + stats->tx_bytes += can_get_echo_skb(ndev, priv->tx_tail % + priv->tx_max); priv->tx_tail++; stats->tx_packets++; } @@ -939,6 +1129,7 @@ static irqreturn_t xcan_interrupt(int irq, void *dev_id) struct xcan_priv *priv = netdev_priv(ndev); u32 isr, ier; u32 isr_errors; + u32 rx_int_mask = xcan_rx_int_mask(priv); /* Get the interrupt status from Xilinx CAN */ isr = priv->read_reg(priv, XCAN_ISR_OFFSET); @@ -958,16 +1149,17 @@ static irqreturn_t xcan_interrupt(int irq, void *dev_id) /* Check for the type of error interrupt and Processing it */ isr_errors = isr & (XCAN_IXR_ERROR_MASK | XCAN_IXR_RXOFLW_MASK | - XCAN_IXR_BSOFF_MASK | XCAN_IXR_ARBLST_MASK); + XCAN_IXR_BSOFF_MASK | XCAN_IXR_ARBLST_MASK | + XCAN_IXR_RXMNF_MASK); if (isr_errors) { priv->write_reg(priv, XCAN_ICR_OFFSET, isr_errors); xcan_err_interrupt(ndev, isr); } /* Check for the type of receive interrupt and Processing it */ - if (isr & XCAN_IXR_RXNEMP_MASK) { + if (isr & rx_int_mask) { ier = priv->read_reg(priv, XCAN_IER_OFFSET); - ier &= ~XCAN_IXR_RXNEMP_MASK; + ier &= ~rx_int_mask; priv->write_reg(priv, XCAN_IER_OFFSET, ier); napi_schedule(&priv->napi); } @@ -1214,13 +1406,35 @@ static const struct dev_pm_ops xcan_dev_pm_ops = { }; static const struct xcan_devtype_data xcan_zynq_data = { - .caps = XCAN_CAP_WATERMARK, + .bittiming_const = &xcan_bittiming_const, + .btr_ts2_shift = XCAN_BTR_TS2_SHIFT, + .btr_sjw_shift = XCAN_BTR_SJW_SHIFT, + .bus_clk_name = "pclk", +}; + +static const struct xcan_devtype_data xcan_axi_data = { + .bittiming_const = &xcan_bittiming_const, + .btr_ts2_shift = XCAN_BTR_TS2_SHIFT, + .btr_sjw_shift = XCAN_BTR_SJW_SHIFT, + .bus_clk_name = "s_axi_aclk", +}; + +static const struct xcan_devtype_data xcan_canfd_data = { + .flags = XCAN_FLAG_EXT_FILTERS | + XCAN_FLAG_RXMNF | + XCAN_FLAG_TX_MAILBOXES | + XCAN_FLAG_RX_FIFO_MULTI, + .bittiming_const = &xcan_bittiming_const, + .btr_ts2_shift = XCAN_BTR_TS2_SHIFT_CANFD, + .btr_sjw_shift = XCAN_BTR_SJW_SHIFT_CANFD, + .bus_clk_name = "s_axi_aclk", }; /* Match table for OF platform binding */ static const struct of_device_id xcan_of_match[] = { { .compatible = "xlnx,zynq-can-1.0", .data = &xcan_zynq_data }, - { .compatible = "xlnx,axi-can-1.00.a", }, + { .compatible = "xlnx,axi-can-1.00.a", .data = &xcan_axi_data }, + { .compatible = "xlnx,canfd-1.0", .data = &xcan_canfd_data }, { /* end of list */ }, }; MODULE_DEVICE_TABLE(of, xcan_of_match); @@ -1240,9 +1454,12 @@ static int xcan_probe(struct platform_device *pdev) struct net_device *ndev; struct xcan_priv *priv; const struct of_device_id *of_id; - int caps = 0; + const struct xcan_devtype_data *devtype = &xcan_axi_data; void __iomem *addr; - int ret, rx_max, tx_max, tx_fifo_depth; + int ret; + int rx_max, tx_max; + int hw_tx_max, hw_rx_max; + const char *hw_tx_max_property; /* Get the virtual base address for the device */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1252,25 +1469,33 @@ static int xcan_probe(struct platform_device *pdev) goto err; } - ret = of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth", - &tx_fifo_depth); - if (ret < 0) - goto err; + of_id = of_match_device(xcan_of_match, &pdev->dev); + if (of_id && of_id->data) + devtype = of_id->data; - ret = of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth", &rx_max); - if (ret < 0) - goto err; + hw_tx_max_property = devtype->flags & XCAN_FLAG_TX_MAILBOXES ? + "tx-mailbox-count" : "tx-fifo-depth"; - of_id = of_match_device(xcan_of_match, &pdev->dev); - if (of_id) { - const struct xcan_devtype_data *devtype_data = of_id->data; + ret = of_property_read_u32(pdev->dev.of_node, hw_tx_max_property, + &hw_tx_max); + if (ret < 0) { + dev_err(&pdev->dev, "missing %s property\n", + hw_tx_max_property); + goto err; + } - if (devtype_data) - caps = devtype_data->caps; + ret = of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth", + &hw_rx_max); + if (ret < 0) { + dev_err(&pdev->dev, + "missing rx-fifo-depth property (mailbox mode is not supported)\n"); + goto err; } - /* There is no way to directly figure out how many frames have been - * sent when the TXOK interrupt is processed. If watermark programming + /* With TX FIFO: + * + * There is no way to directly figure out how many frames have been + * sent when the TXOK interrupt is processed. If TXFEMP * is supported, we can have 2 frames in the FIFO and use TXFEMP * to determine if 1 or 2 frames have been sent. * Theoretically we should be able to use TXFWMEMP to determine up @@ -1279,12 +1504,20 @@ static int xcan_probe(struct platform_device *pdev) * than 2 frames in FIFO) is set anyway with no TXOK (a frame was * sent), which is not a sensible state - possibly TXFWMEMP is not * completely synchronized with the rest of the bits? + * + * With TX mailboxes: + * + * HW sends frames in CAN ID priority order. To preserve FIFO ordering + * we submit frames one at a time. */ - if (caps & XCAN_CAP_WATERMARK) - tx_max = min(tx_fifo_depth, 2); + if (!(devtype->flags & XCAN_FLAG_TX_MAILBOXES) && + (devtype->flags & XCAN_FLAG_TXFEMP)) + tx_max = min(hw_tx_max, 2); else tx_max = 1; + rx_max = hw_rx_max; + /* Create a CAN device instance */ ndev = alloc_candev(sizeof(struct xcan_priv), tx_max); if (!ndev) @@ -1292,13 +1525,14 @@ static int xcan_probe(struct platform_device *pdev) priv = netdev_priv(ndev); priv->dev = &pdev->dev; - priv->can.bittiming_const = &xcan_bittiming_const; + priv->can.bittiming_const = devtype->bittiming_const; priv->can.do_set_mode = xcan_do_set_mode; priv->can.do_get_berr_counter = xcan_get_berr_counter; priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_BERR_REPORTING; priv->reg_base = addr; priv->tx_max = tx_max; + priv->devtype = *devtype; spin_lock_init(&priv->tx_lock); /* Get IRQ for the device */ @@ -1316,22 +1550,12 @@ static int xcan_probe(struct platform_device *pdev) ret = PTR_ERR(priv->can_clk); goto err_free; } - /* Check for type of CAN device */ - if (of_device_is_compatible(pdev->dev.of_node, - "xlnx,zynq-can-1.0")) { - priv->bus_clk = devm_clk_get(&pdev->dev, "pclk"); - if (IS_ERR(priv->bus_clk)) { - dev_err(&pdev->dev, "bus clock not found\n"); - ret = PTR_ERR(priv->bus_clk); - goto err_free; - } - } else { - priv->bus_clk = devm_clk_get(&pdev->dev, "s_axi_aclk"); - if (IS_ERR(priv->bus_clk)) { - dev_err(&pdev->dev, "bus clock not found\n"); - ret = PTR_ERR(priv->bus_clk); - goto err_free; - } + + priv->bus_clk = devm_clk_get(&pdev->dev, devtype->bus_clk_name); + if (IS_ERR(priv->bus_clk)) { + dev_err(&pdev->dev, "bus clock not found\n"); + ret = PTR_ERR(priv->bus_clk); + goto err_free; } priv->write_reg = xcan_write_reg_le; @@ -1364,9 +1588,9 @@ static int xcan_probe(struct platform_device *pdev) pm_runtime_put(&pdev->dev); - netdev_dbg(ndev, "reg_base=0x%p irq=%d clock=%d, tx fifo depth: actual %d, using %d\n", - priv->reg_base, ndev->irq, priv->can.clock.freq, - tx_fifo_depth, priv->tx_max); + netdev_dbg(ndev, "reg_base=0x%p irq=%d clock=%d, tx buffers: actual %d, using %d\n", + priv->reg_base, ndev->irq, priv->can.clock.freq, + hw_tx_max, priv->tx_max); return 0; |