diff options
Diffstat (limited to 'drivers/usb/mtu3')
| -rw-r--r-- | drivers/usb/mtu3/Kconfig | 54 | ||||
| -rw-r--r-- | drivers/usb/mtu3/Makefile | 18 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3.h | 417 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_core.c | 863 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_dr.c | 379 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_dr.h | 108 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_gadget.c | 730 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_gadget_ep0.c | 881 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_host.c | 294 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_hw_regs.h | 473 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_plat.c | 484 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_qmu.c | 573 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_qmu.h | 43 |
13 files changed, 5317 insertions, 0 deletions
diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig new file mode 100644 index 000000000000..25cd61947bee --- /dev/null +++ b/drivers/usb/mtu3/Kconfig @@ -0,0 +1,54 @@ +# For MTK USB3.0 IP + +config USB_MTU3 + tristate "MediaTek USB3 Dual Role controller" + depends on EXTCON && (USB || USB_GADGET) && HAS_DMA + depends on ARCH_MEDIATEK || COMPILE_TEST + select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD + help + Say Y or M here if your system runs on MediaTek SoCs with + Dual Role SuperSpeed USB controller. You can select usb + mode as peripheral role or host role, or both. + + If you don't know what this is, please say N. + + Choose M here to compile this driver as a module, and it + will be called mtu3.ko. + + +if USB_MTU3 +choice + bool "MTU3 Mode Selection" + default USB_MTU3_DUAL_ROLE if (USB && USB_GADGET) + default USB_MTU3_HOST if (USB && !USB_GADGET) + default USB_MTU3_GADGET if (!USB && USB_GADGET) + +config USB_MTU3_HOST + bool "Host only mode" + depends on USB=y || USB=USB_MTU3 + help + Select this when you want to use MTU3 in host mode only, + thereby the gadget feature will be regressed. + +config USB_MTU3_GADGET + bool "Gadget only mode" + depends on USB_GADGET=y || USB_GADGET=USB_MTU3 + help + Select this when you want to use MTU3 in gadget mode only, + thereby the host feature will be regressed. + +config USB_MTU3_DUAL_ROLE + bool "Dual Role mode" + depends on ((USB=y || USB=USB_MTU3) && (USB_GADGET=y || USB_GADGET=USB_MTU3)) + help + This is the default mode of working of MTU3 controller where + both host and gadget features are enabled. + +endchoice + +config USB_MTU3_DEBUG + bool "Enable Debugging Messages" + help + Say Y here to enable debugging messages in the MTU3 Driver. + +endif diff --git a/drivers/usb/mtu3/Makefile b/drivers/usb/mtu3/Makefile new file mode 100644 index 000000000000..60e0fff7a847 --- /dev/null +++ b/drivers/usb/mtu3/Makefile @@ -0,0 +1,18 @@ + +ccflags-$(CONFIG_USB_MTU3_DEBUG) += -DDEBUG + +obj-$(CONFIG_USB_MTU3) += mtu3.o + +mtu3-y := mtu3_plat.o + +ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),) + mtu3-y += mtu3_host.o +endif + +ifneq ($(filter y,$(CONFIG_USB_MTU3_GADGET) $(CONFIG_USB_MTU3_DUAL_ROLE)),) + mtu3-y += mtu3_core.o mtu3_gadget_ep0.o mtu3_gadget.o mtu3_qmu.o +endif + +ifneq ($(CONFIG_USB_MTU3_DUAL_ROLE),) + mtu3-y += mtu3_dr.o +endif diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h new file mode 100644 index 000000000000..ba9df719f363 --- /dev/null +++ b/drivers/usb/mtu3/mtu3.h @@ -0,0 +1,417 @@ +/* + * mtu3.h - MediaTek USB3 DRD header + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#ifndef __MTU3_H__ +#define __MTU3_H__ + +#include <linux/device.h> +#include <linux/dmapool.h> +#include <linux/extcon.h> +#include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/phy/phy.h> +#include <linux/regulator/consumer.h> +#include <linux/usb.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb/otg.h> + +struct mtu3; +struct mtu3_ep; +struct mtu3_request; + +#include "mtu3_hw_regs.h" +#include "mtu3_qmu.h" + +#define MU3D_EP_TXCR0(epnum) (U3D_TX1CSR0 + (((epnum) - 1) * 0x10)) +#define MU3D_EP_TXCR1(epnum) (U3D_TX1CSR1 + (((epnum) - 1) * 0x10)) +#define MU3D_EP_TXCR2(epnum) (U3D_TX1CSR2 + (((epnum) - 1) * 0x10)) + +#define MU3D_EP_RXCR0(epnum) (U3D_RX1CSR0 + (((epnum) - 1) * 0x10)) +#define MU3D_EP_RXCR1(epnum) (U3D_RX1CSR1 + (((epnum) - 1) * 0x10)) +#define MU3D_EP_RXCR2(epnum) (U3D_RX1CSR2 + (((epnum) - 1) * 0x10)) + +#define USB_QMU_RQCSR(epnum) (U3D_RXQCSR1 + (((epnum) - 1) * 0x10)) +#define USB_QMU_RQSAR(epnum) (U3D_RXQSAR1 + (((epnum) - 1) * 0x10)) +#define USB_QMU_RQCPR(epnum) (U3D_RXQCPR1 + (((epnum) - 1) * 0x10)) + +#define USB_QMU_TQCSR(epnum) (U3D_TXQCSR1 + (((epnum) - 1) * 0x10)) +#define USB_QMU_TQSAR(epnum) (U3D_TXQSAR1 + (((epnum) - 1) * 0x10)) +#define USB_QMU_TQCPR(epnum) (U3D_TXQCPR1 + (((epnum) - 1) * 0x10)) + +#define SSUSB_U3_CTRL(p) (U3D_SSUSB_U3_CTRL_0P + ((p) * 0x08)) +#define SSUSB_U2_CTRL(p) (U3D_SSUSB_U2_CTRL_0P + ((p) * 0x08)) + +#define MTU3_DRIVER_NAME "mtu3" +#define DMA_ADDR_INVALID (~(dma_addr_t)0) + +#define MTU3_EP_ENABLED BIT(0) +#define MTU3_EP_STALL BIT(1) +#define MTU3_EP_WEDGE BIT(2) +#define MTU3_EP_BUSY BIT(3) + +#define MTU3_U3_IP_SLOT_DEFAULT 2 +#define MTU3_U2_IP_SLOT_DEFAULT 1 + +/** + * Normally the device works on HS or SS, to simplify fifo management, + * devide fifo into some 512B parts, use bitmap to manage it; And + * 128 bits size of bitmap is large enough, that means it can manage + * up to 64KB fifo size. + * NOTE: MTU3_EP_FIFO_UNIT should be power of two + */ +#define MTU3_EP_FIFO_UNIT (1 << 9) +#define MTU3_FIFO_BIT_SIZE 128 +#define MTU3_U2_IP_EP0_FIFO_SIZE 64 + +/** + * Maximum size of ep0 response buffer for ch9 requests, + * the SET_SEL request uses 6 so far, and GET_STATUS is 2 + */ +#define EP0_RESPONSE_BUF 6 + +/* device operated link and speed got from DEVICE_CONF register */ +enum mtu3_speed { + MTU3_SPEED_INACTIVE = 0, + MTU3_SPEED_FULL = 1, + MTU3_SPEED_HIGH = 3, + MTU3_SPEED_SUPER = 4, +}; + +/** + * @MU3D_EP0_STATE_SETUP: waits for SETUP or received a SETUP + * without data stage. + * @MU3D_EP0_STATE_TX: IN data stage + * @MU3D_EP0_STATE_RX: OUT data stage + * @MU3D_EP0_STATE_TX_END: the last IN data is transferred, and + * waits for its completion interrupt + * @MU3D_EP0_STATE_STALL: ep0 is in stall status, will be auto-cleared + * after receives a SETUP. + */ +enum mtu3_g_ep0_state { + MU3D_EP0_STATE_SETUP = 1, + MU3D_EP0_STATE_TX, + MU3D_EP0_STATE_RX, + MU3D_EP0_STATE_TX_END, + MU3D_EP0_STATE_STALL, +}; + +/** + * @base: the base address of fifo + * @limit: the bitmap size in bits + * @bitmap: fifo bitmap in unit of @MTU3_EP_FIFO_UNIT + */ +struct mtu3_fifo_info { + u32 base; + u32 limit; + DECLARE_BITMAP(bitmap, MTU3_FIFO_BIT_SIZE); +}; + +/** + * General Purpose Descriptor (GPD): + * The format of TX GPD is a little different from RX one. + * And the size of GPD is 16 bytes. + * + * @flag: + * bit0: Hardware Own (HWO) + * bit1: Buffer Descriptor Present (BDP), always 0, BD is not supported + * bit2: Bypass (BPS), 1: HW skips this GPD if HWO = 1 + * bit7: Interrupt On Completion (IOC) + * @chksum: This is used to validate the contents of this GPD; + * If TXQ_CS_EN / RXQ_CS_EN bit is set, an interrupt is issued + * when checksum validation fails; + * Checksum value is calculated over the 16 bytes of the GPD by default; + * @data_buf_len (RX ONLY): This value indicates the length of + * the assigned data buffer + * @next_gpd: Physical address of the next GPD + * @buffer: Physical address of the data buffer + * @buf_len: + * (TX): This value indicates the length of the assigned data buffer + * (RX): The total length of data received + * @ext_len: reserved + * @ext_flag: + * bit5 (TX ONLY): Zero Length Packet (ZLP), + */ +struct qmu_gpd { + __u8 flag; + __u8 chksum; + __le16 data_buf_len; + __le32 next_gpd; + __le32 buffer; + __le16 buf_len; + __u8 ext_len; + __u8 ext_flag; +} __packed; + +/** +* dma: physical base address of GPD segment +* start: virtual base address of GPD segment +* end: the last GPD element +* enqueue: the first empty GPD to use +* dequeue: the first completed GPD serviced by ISR +* NOTE: the size of GPD ring should be >= 2 +*/ +struct mtu3_gpd_ring { + dma_addr_t dma; + struct qmu_gpd *start; + struct qmu_gpd *end; + struct qmu_gpd *enqueue; + struct qmu_gpd *dequeue; +}; + +/** +* @vbus: vbus 5V used by host mode +* @edev: external connector used to detect vbus and iddig changes +* @vbus_nb: notifier for vbus detection +* @vbus_nb: notifier for iddig(idpin) detection +* @extcon_reg_dwork: delay work for extcon notifier register, waiting for +* xHCI driver initialization, it's necessary for system bootup +* as device. +* @is_u3_drd: whether port0 supports usb3.0 dual-role device or not +* @id_*: used to maually switch between host and device modes by idpin +* @manual_drd_enabled: it's true when supports dual-role device by debugfs +* to switch host/device modes depending on user input. +*/ +struct otg_switch_mtk { + struct regulator *vbus; + struct extcon_dev *edev; + struct notifier_block vbus_nb; + struct notifier_block id_nb; + struct delayed_work extcon_reg_dwork; + bool is_u3_drd; + /* dual-role switch by debugfs */ + struct pinctrl *id_pinctrl; + struct pinctrl_state *id_float; + struct pinctrl_state *id_ground; + bool manual_drd_enabled; +}; + +/** + * @mac_base: register base address of device MAC, exclude xHCI's + * @ippc_base: register base address of IP Power and Clock interface (IPPC) + * @vusb33: usb3.3V shared by device/host IP + * @sys_clk: system clock of mtu3, shared by device/host IP + * @dr_mode: works in which mode: + * host only, device only or dual-role mode + * @u2_ports: number of usb2.0 host ports + * @u3_ports: number of usb3.0 host ports + * @dbgfs_root: only used when supports manual dual-role switch via debugfs + * @wakeup_en: it's true when supports remote wakeup in host mode + * @wk_deb_p0: port0's wakeup debounce clock + * @wk_deb_p1: it's optional, and depends on port1 is supported or not + */ +struct ssusb_mtk { + struct device *dev; + struct mtu3 *u3d; + void __iomem *mac_base; + void __iomem *ippc_base; + struct phy **phys; + int num_phys; + /* common power & clock */ + struct regulator *vusb33; + struct clk *sys_clk; + /* otg */ + struct otg_switch_mtk otg_switch; + enum usb_dr_mode dr_mode; + bool is_host; + int u2_ports; + int u3_ports; + struct dentry *dbgfs_root; + /* usb wakeup for host mode */ + bool wakeup_en; + struct clk *wk_deb_p0; + struct clk *wk_deb_p1; + struct regmap *pericfg; +}; + +/** + * @fifo_size: it is (@slot + 1) * @fifo_seg_size + * @fifo_seg_size: it is roundup_pow_of_two(@maxp) + */ +struct mtu3_ep { + struct usb_ep ep; + char name[12]; + struct mtu3 *mtu; + u8 epnum; + u8 type; + u8 is_in; + u16 maxp; + int slot; + u32 fifo_size; + u32 fifo_addr; + u32 fifo_seg_size; + struct mtu3_fifo_info *fifo; + + struct list_head req_list; + struct mtu3_gpd_ring gpd_ring; + const struct usb_ss_ep_comp_descriptor *comp_desc; + const struct usb_endpoint_descriptor *desc; + + int flags; + u8 wedged; + u8 busy; +}; + +struct mtu3_request { + struct usb_request request; + struct list_head list; + struct mtu3_ep *mep; + struct mtu3 *mtu; + struct qmu_gpd *gpd; + int epnum; +}; + +static inline struct ssusb_mtk *dev_to_ssusb(struct device *dev) +{ + return dev_get_drvdata(dev); +} + +/** + * struct mtu3 - device driver instance data. + * @slot: MTU3_U2_IP_SLOT_DEFAULT for U2 IP only, + * MTU3_U3_IP_SLOT_DEFAULT for U3 IP + * @may_wakeup: means device's remote wakeup is enabled + * @is_self_powered: is reported in device status and the config descriptor + * @ep0_req: dummy request used while handling standard USB requests + * for GET_STATUS and SET_SEL + * @setup_buf: ep0 response buffer for GET_STATUS and SET_SEL requests + */ +struct mtu3 { + spinlock_t lock; + struct ssusb_mtk *ssusb; + struct device *dev; + void __iomem *mac_base; + void __iomem *ippc_base; + int irq; + + struct mtu3_fifo_info tx_fifo; + struct mtu3_fifo_info rx_fifo; + + struct mtu3_ep *ep_array; + struct mtu3_ep *in_eps; + struct mtu3_ep *out_eps; + struct mtu3_ep *ep0; + int num_eps; + int slot; + int active_ep; + + struct dma_pool *qmu_gpd_pool; + enum mtu3_g_ep0_state ep0_state; + struct usb_gadget g; /* the gadget */ + struct usb_gadget_driver *gadget_driver; + struct mtu3_request ep0_req; + u8 setup_buf[EP0_RESPONSE_BUF]; + u32 max_speed; + + unsigned is_active:1; + unsigned may_wakeup:1; + unsigned is_self_powered:1; + unsigned test_mode:1; + unsigned softconnect:1; + unsigned u1_enable:1; + unsigned u2_enable:1; + unsigned is_u3_ip:1; + + u8 address; + u8 test_mode_nr; + u32 hw_version; +}; + +static inline struct mtu3 *gadget_to_mtu3(struct usb_gadget *g) +{ + return container_of(g, struct mtu3, g); +} + +static inline int is_first_entry(const struct list_head *list, + const struct list_head *head) +{ + return list_is_last(head, list); +} + +static inline struct mtu3_request *to_mtu3_request(struct usb_request *req) +{ + return req ? container_of(req, struct mtu3_request, request) : NULL; +} + +static inline struct mtu3_ep *to_mtu3_ep(struct usb_ep *ep) +{ + return ep ? container_of(ep, struct mtu3_ep, ep) : NULL; +} + +static inline struct mtu3_request *next_request(struct mtu3_ep *mep) +{ + struct list_head *queue = &mep->req_list; + + if (list_empty(queue)) + return NULL; + + return list_first_entry(queue, struct mtu3_request, list); +} + +static inline void mtu3_writel(void __iomem *base, u32 offset, u32 data) +{ + writel(data, base + offset); +} + +static inline u32 mtu3_readl(void __iomem *base, u32 offset) +{ + return readl(base + offset); +} + +static inline void mtu3_setbits(void __iomem *base, u32 offset, u32 bits) +{ + void __iomem *addr = base + offset; + u32 tmp = readl(addr); + + writel((tmp | (bits)), addr); +} + +static inline void mtu3_clrbits(void __iomem *base, u32 offset, u32 bits) +{ + void __iomem *addr = base + offset; + u32 tmp = readl(addr); + + writel((tmp & ~(bits)), addr); +} + +int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks); +struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); +void mtu3_free_request(struct usb_ep *ep, struct usb_request *req); +void mtu3_req_complete(struct mtu3_ep *mep, + struct usb_request *req, int status); + +int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep, + int interval, int burst, int mult); +void mtu3_deconfig_ep(struct mtu3 *mtu, struct mtu3_ep *mep); +void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set); +void mtu3_ep0_setup(struct mtu3 *mtu); +void mtu3_start(struct mtu3 *mtu); +void mtu3_stop(struct mtu3 *mtu); +void mtu3_dev_on_off(struct mtu3 *mtu, int is_on); + +int mtu3_gadget_setup(struct mtu3 *mtu); +void mtu3_gadget_cleanup(struct mtu3 *mtu); +void mtu3_gadget_reset(struct mtu3 *mtu); +void mtu3_gadget_suspend(struct mtu3 *mtu); +void mtu3_gadget_resume(struct mtu3 *mtu); +void mtu3_gadget_disconnect(struct mtu3 *mtu); + +irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu); +extern const struct usb_ep_ops mtu3_ep0_ops; + +#endif diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c new file mode 100644 index 000000000000..99c65b0788ff --- /dev/null +++ b/drivers/usb/mtu3/mtu3_core.c @@ -0,0 +1,863 @@ +/* + * mtu3_core.c - hardware access layer and gadget init/exit of + * MediaTek usb3 Dual-Role Controller Driver + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> + +#include "mtu3.h" + +static int ep_fifo_alloc(struct mtu3_ep *mep, u32 seg_size) +{ + struct mtu3_fifo_info *fifo = mep->fifo; + u32 num_bits = DIV_ROUND_UP(seg_size, MTU3_EP_FIFO_UNIT); + u32 start_bit; + + /* ensure that @mep->fifo_seg_size is power of two */ + num_bits = roundup_pow_of_two(num_bits); + if (num_bits > fifo->limit) + return -EINVAL; + + mep->fifo_seg_size = num_bits * MTU3_EP_FIFO_UNIT; + num_bits = num_bits * (mep->slot + 1); + start_bit = bitmap_find_next_zero_area(fifo->bitmap, + fifo->limit, 0, num_bits, 0); + if (start_bit >= fifo->limit) + return -EOVERFLOW; + + bitmap_set(fifo->bitmap, start_bit, num_bits); + mep->fifo_size = num_bits * MTU3_EP_FIFO_UNIT; + mep->fifo_addr = fifo->base + MTU3_EP_FIFO_UNIT * start_bit; + + dev_dbg(mep->mtu->dev, "%s fifo:%#x/%#x, start_bit: %d\n", + __func__, mep->fifo_seg_size, mep->fifo_size, start_bit); + + return mep->fifo_addr; +} + +static void ep_fifo_free(struct mtu3_ep *mep) +{ + struct mtu3_fifo_info *fifo = mep->fifo; + u32 addr = mep->fifo_addr; + u32 bits = mep->fifo_size / MTU3_EP_FIFO_UNIT; + u32 start_bit; + + if (unlikely(addr < fifo->base || bits > fifo->limit)) + return; + + start_bit = (addr - fifo->base) / MTU3_EP_FIFO_UNIT; + bitmap_clear(fifo->bitmap, start_bit, bits); + mep->fifo_size = 0; + mep->fifo_seg_size = 0; + + dev_dbg(mep->mtu->dev, "%s size:%#x/%#x, start_bit: %d\n", + __func__, mep->fifo_seg_size, mep->fifo_size, start_bit); +} + +/* enable/disable U3D SS function */ +static inline void mtu3_ss_func_set(struct mtu3 *mtu, bool enable) +{ + /* If usb3_en==0, LTSSM will go to SS.Disable state */ + if (enable) + mtu3_setbits(mtu->mac_base, U3D_USB3_CONFIG, USB3_EN); + else + mtu3_clrbits(mtu->mac_base, U3D_USB3_CONFIG, USB3_EN); + + dev_dbg(mtu->dev, "USB3_EN = %d\n", !!enable); +} + +/* set/clear U3D HS device soft connect */ +static inline void mtu3_hs_softconn_set(struct mtu3 *mtu, bool enable) +{ + if (enable) { + mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, + SOFT_CONN | SUSPENDM_ENABLE); + } else { + mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, + SOFT_CONN | SUSPENDM_ENABLE); + } + dev_dbg(mtu->dev, "SOFTCONN = %d\n", !!enable); +} + +/* only port0 of U2/U3 supports device mode */ +static int mtu3_device_enable(struct mtu3 *mtu) +{ + void __iomem *ibase = mtu->ippc_base; + u32 check_clk = 0; + + mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); + + if (mtu->is_u3_ip) { + check_clk = SSUSB_U3_MAC_RST_B_STS; + mtu3_clrbits(ibase, SSUSB_U3_CTRL(0), + (SSUSB_U3_PORT_DIS | SSUSB_U3_PORT_PDN | + SSUSB_U3_PORT_HOST_SEL)); + } + mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), + (SSUSB_U2_PORT_DIS | SSUSB_U2_PORT_PDN | + SSUSB_U2_PORT_HOST_SEL)); + mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL); + + return ssusb_check_clocks(mtu->ssusb, check_clk); +} + +static void mtu3_device_disable(struct mtu3 *mtu) +{ + void __iomem *ibase = mtu->ippc_base; + + if (mtu->is_u3_ip) + mtu3_setbits(ibase, SSUSB_U3_CTRL(0), + (SSUSB_U3_PORT_DIS | SSUSB_U3_PORT_PDN)); + + mtu3_setbits(ibase, SSUSB_U2_CTRL(0), + SSUSB_U2_PORT_DIS | SSUSB_U2_PORT_PDN); + mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL); + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); +} + +/* reset U3D's device module. */ +static void mtu3_device_reset(struct mtu3 *mtu) +{ + void __iomem *ibase = mtu->ippc_base; + + mtu3_setbits(ibase, U3D_SSUSB_DEV_RST_CTRL, SSUSB_DEV_SW_RST); + udelay(1); + mtu3_clrbits(ibase, U3D_SSUSB_DEV_RST_CTRL, SSUSB_DEV_SW_RST); +} + +/* disable all interrupts */ +static void mtu3_intr_disable(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + + /* Disable level 1 interrupts */ + mtu3_writel(mbase, U3D_LV1IECR, ~0x0); + /* Disable endpoint interrupts */ + mtu3_writel(mbase, U3D_EPIECR, ~0x0); +} + +static void mtu3_intr_status_clear(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + + /* Clear EP0 and Tx/Rx EPn interrupts status */ + mtu3_writel(mbase, U3D_EPISR, ~0x0); + /* Clear U2 USB common interrupts status */ + mtu3_writel(mbase, U3D_COMMON_USB_INTR, ~0x0); + /* Clear U3 LTSSM interrupts status */ + mtu3_writel(mbase, U3D_LTSSM_INTR, ~0x0); + /* Clear speed change interrupt status */ + mtu3_writel(mbase, U3D_DEV_LINK_INTR, ~0x0); +} + +/* enable system global interrupt */ +static void mtu3_intr_enable(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + u32 value; + + /*Enable level 1 interrupts (BMU, QMU, MAC3, DMA, MAC2, EPCTL) */ + value = BMU_INTR | QMU_INTR | MAC3_INTR | MAC2_INTR | EP_CTRL_INTR; + mtu3_writel(mbase, U3D_LV1IESR, value); + + /* Enable U2 common USB interrupts */ + value = SUSPEND_INTR | RESUME_INTR | RESET_INTR; + mtu3_writel(mbase, U3D_COMMON_USB_INTR_ENABLE, value); + + if (mtu->is_u3_ip) { + /* Enable U3 LTSSM interrupts */ + value = HOT_RST_INTR | WARM_RST_INTR | VBUS_RISE_INTR | + VBUS_FALL_INTR | ENTER_U3_INTR | EXIT_U3_INTR; + mtu3_writel(mbase, U3D_LTSSM_INTR_ENABLE, value); + } + + /* Enable QMU interrupts. */ + value = TXQ_CSERR_INT | TXQ_LENERR_INT | RXQ_CSERR_INT | + RXQ_LENERR_INT | RXQ_ZLPERR_INT; + mtu3_writel(mbase, U3D_QIESR1, value); + + /* Enable speed change interrupt */ + mtu3_writel(mbase, U3D_DEV_LINK_INTR_ENABLE, SSUSB_DEV_SPEED_CHG_INTR); +} + +/* set/clear the stall and toggle bits for non-ep0 */ +void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set) +{ + struct mtu3 *mtu = mep->mtu; + void __iomem *mbase = mtu->mac_base; + u8 epnum = mep->epnum; + u32 csr; + + if (mep->is_in) { /* TX */ + csr = mtu3_readl(mbase, MU3D_EP_TXCR0(epnum)) & TX_W1C_BITS; + if (set) + csr |= TX_SENDSTALL; + else + csr = (csr & (~TX_SENDSTALL)) | TX_SENTSTALL; + mtu3_writel(mbase, MU3D_EP_TXCR0(epnum), csr); + } else { /* RX */ + csr = mtu3_readl(mbase, MU3D_EP_RXCR0(epnum)) & RX_W1C_BITS; + if (set) + csr |= RX_SENDSTALL; + else + csr = (csr & (~RX_SENDSTALL)) | RX_SENTSTALL; + mtu3_writel(mbase, MU3D_EP_RXCR0(epnum), csr); + } + + if (!set) { + mtu3_setbits(mbase, U3D_EP_RST, EP_RST(mep->is_in, epnum)); + mtu3_clrbits(mbase, U3D_EP_RST, EP_RST(mep->is_in, epnum)); + mep->flags &= ~MTU3_EP_STALL; + } else { + mep->flags |= MTU3_EP_STALL; + } + + dev_dbg(mtu->dev, "%s: %s\n", mep->name, + set ? "SEND STALL" : "CLEAR STALL, with EP RESET"); +} + +void mtu3_dev_on_off(struct mtu3 *mtu, int is_on) +{ + if (mtu->is_u3_ip && (mtu->max_speed == USB_SPEED_SUPER)) + mtu3_ss_func_set(mtu, is_on); + else + mtu3_hs_softconn_set(mtu, is_on); + + dev_info(mtu->dev, "gadget (%s) pullup D%s\n", + usb_speed_string(mtu->max_speed), is_on ? "+" : "-"); +} + +void mtu3_start(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + + dev_dbg(mtu->dev, "%s devctl 0x%x\n", __func__, + mtu3_readl(mbase, U3D_DEVICE_CONTROL)); + + mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); + + /* + * When disable U2 port, USB2_CSR's register will be reset to + * default value after re-enable it again(HS is enabled by default). + * So if force mac to work as FS, disable HS function. + */ + if (mtu->max_speed == USB_SPEED_FULL) + mtu3_clrbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE); + + /* Initialize the default interrupts */ + mtu3_intr_enable(mtu); + mtu->is_active = 1; + + if (mtu->softconnect) + mtu3_dev_on_off(mtu, 1); +} + +void mtu3_stop(struct mtu3 *mtu) +{ + dev_dbg(mtu->dev, "%s\n", __func__); + + mtu3_intr_disable(mtu); + mtu3_intr_status_clear(mtu); + + if (mtu->softconnect) + mtu3_dev_on_off(mtu, 0); + + mtu->is_active = 0; + mtu3_setbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); +} + +/* for non-ep0 */ +int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep, + int interval, int burst, int mult) +{ + void __iomem *mbase = mtu->mac_base; + int epnum = mep->epnum; + u32 csr0, csr1, csr2; + int fifo_sgsz, fifo_addr; + int num_pkts; + + fifo_addr = ep_fifo_alloc(mep, mep->maxp); + if (fifo_addr < 0) { + dev_err(mtu->dev, "alloc ep fifo failed(%d)\n", mep->maxp); + return -ENOMEM; + } + fifo_sgsz = ilog2(mep->fifo_seg_size); + dev_dbg(mtu->dev, "%s fifosz: %x(%x/%x)\n", __func__, fifo_sgsz, + mep->fifo_seg_size, mep->fifo_size); + + if (mep->is_in) { + csr0 = TX_TXMAXPKTSZ(mep->maxp); + csr0 |= TX_DMAREQEN; + + num_pkts = (burst + 1) * (mult + 1) - 1; + csr1 = TX_SS_BURST(burst) | TX_SLOT(mep->slot); + csr1 |= TX_MAX_PKT(num_pkts) | TX_MULT(mult); + + csr2 = TX_FIFOADDR(fifo_addr >> 4); + csr2 |= TX_FIFOSEGSIZE(fifo_sgsz); + + switch (mep->type) { + case USB_ENDPOINT_XFER_BULK: + csr1 |= TX_TYPE(TYPE_BULK); + break; + case USB_ENDPOINT_XFER_ISOC: + csr1 |= TX_TYPE(TYPE_ISO); + csr2 |= TX_BINTERVAL(interval); + break; + case USB_ENDPOINT_XFER_INT: + csr1 |= TX_TYPE(TYPE_INT); + csr2 |= TX_BINTERVAL(interval); + break; + } + + /* Enable QMU Done interrupt */ + mtu3_setbits(mbase, U3D_QIESR0, QMU_TX_DONE_INT(epnum)); + + mtu3_writel(mbase, MU3D_EP_TXCR0(epnum), csr0); + mtu3_writel(mbase, MU3D_EP_TXCR1(epnum), csr1); + mtu3_writel(mbase, MU3D_EP_TXCR2(epnum), csr2); + + dev_dbg(mtu->dev, "U3D_TX%d CSR0:%#x, CSR1:%#x, CSR2:%#x\n", + epnum, mtu3_readl(mbase, MU3D_EP_TXCR0(epnum)), + mtu3_readl(mbase, MU3D_EP_TXCR1(epnum)), + mtu3_readl(mbase, MU3D_EP_TXCR2(epnum))); + } else { + csr0 = RX_RXMAXPKTSZ(mep->maxp); + csr0 |= RX_DMAREQEN; + + num_pkts = (burst + 1) * (mult + 1) - 1; + csr1 = RX_SS_BURST(burst) | RX_SLOT(mep->slot); + csr1 |= RX_MAX_PKT(num_pkts) | RX_MULT(mult); + + csr2 = RX_FIFOADDR(fifo_addr >> 4); + csr2 |= RX_FIFOSEGSIZE(fifo_sgsz); + + switch (mep->type) { + case USB_ENDPOINT_XFER_BULK: + csr1 |= RX_TYPE(TYPE_BULK); + break; + case USB_ENDPOINT_XFER_ISOC: + csr1 |= RX_TYPE(TYPE_ISO); + csr2 |= RX_BINTERVAL(interval); + break; + case USB_ENDPOINT_XFER_INT: + csr1 |= RX_TYPE(TYPE_INT); + csr2 |= RX_BINTERVAL(interval); + break; + } + + /*Enable QMU Done interrupt */ + mtu3_setbits(mbase, U3D_QIESR0, QMU_RX_DONE_INT(epnum)); + + mtu3_writel(mbase, MU3D_EP_RXCR0(epnum), csr0); + mtu3_writel(mbase, MU3D_EP_RXCR1(epnum), csr1); + mtu3_writel(mbase, MU3D_EP_RXCR2(epnum), csr2); + + dev_dbg(mtu->dev, "U3D_RX%d CSR0:%#x, CSR1:%#x, CSR2:%#x\n", + epnum, mtu3_readl(mbase, MU3D_EP_RXCR0(epnum)), + mtu3_readl(mbase, MU3D_EP_RXCR1(epnum)), + mtu3_readl(mbase, MU3D_EP_RXCR2(epnum))); + } + + dev_dbg(mtu->dev, "csr0:%#x, csr1:%#x, csr2:%#x\n", csr0, csr1, csr2); + dev_dbg(mtu->dev, "%s: %s, fifo-addr:%#x, fifo-size:%#x(%#x/%#x)\n", + __func__, mep->name, mep->fifo_addr, mep->fifo_size, + fifo_sgsz, mep->fifo_seg_size); + + return 0; +} + +/* for non-ep0 */ +void mtu3_deconfig_ep(struct mtu3 *mtu, struct mtu3_ep *mep) +{ + void __iomem *mbase = mtu->mac_base; + int epnum = mep->epnum; + + if (mep->is_in) { + mtu3_writel(mbase, MU3D_EP_TXCR0(epnum), 0); + mtu3_writel(mbase, MU3D_EP_TXCR1(epnum), 0); + mtu3_writel(mbase, MU3D_EP_TXCR2(epnum), 0); + mtu3_setbits(mbase, U3D_QIECR0, QMU_TX_DONE_INT(epnum)); + } else { + mtu3_writel(mbase, MU3D_EP_RXCR0(epnum), 0); + mtu3_writel(mbase, MU3D_EP_RXCR1(epnum), 0); + mtu3_writel(mbase, MU3D_EP_RXCR2(epnum), 0); + mtu3_setbits(mbase, U3D_QIECR0, QMU_RX_DONE_INT(epnum)); + } + + ep_fifo_free(mep); + + dev_dbg(mtu->dev, "%s: %s\n", __func__, mep->name); +} + +/* + * Two scenarios: + * 1. when device IP supports SS, the fifo of EP0, TX EPs, RX EPs + * are separated; + * 2. when supports only HS, the fifo is shared for all EPs, and + * the capability registers of @EPNTXFFSZ or @EPNRXFFSZ indicate + * the total fifo size of non-ep0, and ep0's is fixed to 64B, + * so the total fifo size is 64B + @EPNTXFFSZ; + * Due to the first 64B should be reserved for EP0, non-ep0's fifo + * starts from offset 64 and are divided into two equal parts for + * TX or RX EPs for simplification. + */ +static void get_ep_fifo_config(struct mtu3 *mtu) +{ + struct mtu3_fifo_info *tx_fifo; + struct mtu3_fifo_info *rx_fifo; + u32 fifosize; + + if (mtu->is_u3_ip) { + fifosize = mtu3_readl(mtu->mac_base, U3D_CAP_EPNTXFFSZ); + tx_fifo = &mtu->tx_fifo; + tx_fifo->base = 0; + tx_fifo->limit = fifosize / MTU3_EP_FIFO_UNIT; + bitmap_zero(tx_fifo->bitmap, MTU3_FIFO_BIT_SIZE); + + fifosize = mtu3_readl(mtu->mac_base, U3D_CAP_EPNRXFFSZ); + rx_fifo = &mtu->rx_fifo; + rx_fifo->base = 0; + rx_fifo->limit = fifosize / MTU3_EP_FIFO_UNIT; + bitmap_zero(rx_fifo->bitmap, MTU3_FIFO_BIT_SIZE); + mtu->slot = MTU3_U3_IP_SLOT_DEFAULT; + } else { + fifosize = mtu3_readl(mtu->mac_base, U3D_CAP_EPNTXFFSZ); + tx_fifo = &mtu->tx_fifo; + tx_fifo->base = MTU3_U2_IP_EP0_FIFO_SIZE; + tx_fifo->limit = (fifosize / MTU3_EP_FIFO_UNIT) >> 1; + bitmap_zero(tx_fifo->bitmap, MTU3_FIFO_BIT_SIZE); + + rx_fifo = &mtu->rx_fifo; + rx_fifo->base = + tx_fifo->base + tx_fifo->limit * MTU3_EP_FIFO_UNIT; + rx_fifo->limit = tx_fifo->limit; + bitmap_zero(rx_fifo->bitmap, MTU3_FIFO_BIT_SIZE); + mtu->slot = MTU3_U2_IP_SLOT_DEFAULT; + } + + dev_dbg(mtu->dev, "%s, TX: base-%d, limit-%d; RX: base-%d, limit-%d\n", + __func__, tx_fifo->base, tx_fifo->limit, + rx_fifo->base, rx_fifo->limit); +} + +void mtu3_ep0_setup(struct mtu3 *mtu) +{ + u32 maxpacket = mtu->g.ep0->maxpacket; + u32 csr; + + dev_dbg(mtu->dev, "%s maxpacket: %d\n", __func__, maxpacket); + + csr = mtu3_readl(mtu->mac_base, U3D_EP0CSR); + csr &= ~EP0_MAXPKTSZ_MSK; + csr |= EP0_MAXPKTSZ(maxpacket); + csr &= EP0_W1C_BITS; + mtu3_writel(mtu->mac_base, U3D_EP0CSR, csr); + + /* Enable EP0 interrupt */ + mtu3_writel(mtu->mac_base, U3D_EPIESR, EP0ISR); +} + +static int mtu3_mem_alloc(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + struct mtu3_ep *ep_array; + int in_ep_num, out_ep_num; + u32 cap_epinfo; + int ret; + int i; + + cap_epinfo = mtu3_readl(mbase, U3D_CAP_EPINFO); + in_ep_num = CAP_TX_EP_NUM(cap_epinfo); + out_ep_num = CAP_RX_EP_NUM(cap_epinfo); + + dev_info(mtu->dev, "fifosz/epnum: Tx=%#x/%d, Rx=%#x/%d\n", + mtu3_readl(mbase, U3D_CAP_EPNTXFFSZ), in_ep_num, + mtu3_readl(mbase, U3D_CAP_EPNRXFFSZ), out_ep_num); + + /* one for ep0, another is reserved */ + mtu->num_eps = min(in_ep_num, out_ep_num) + 1; + ep_array = kcalloc(mtu->num_eps * 2, sizeof(*ep_array), GFP_KERNEL); + if (ep_array == NULL) + return -ENOMEM; + + mtu->ep_array = ep_array; + mtu->in_eps = ep_array; + mtu->out_eps = &ep_array[mtu->num_eps]; + /* ep0 uses in_eps[0], out_eps[0] is reserved */ + mtu->ep0 = mtu->in_eps; + mtu->ep0->mtu = mtu; + mtu->ep0->epnum = 0; + + for (i = 1; i < mtu->num_eps; i++) { + struct mtu3_ep *mep = mtu->in_eps + i; + + mep->fifo = &mtu->tx_fifo; + mep = mtu->out_eps + i; + mep->fifo = &mtu->rx_fifo; + } + + get_ep_fifo_config(mtu); + + ret = mtu3_qmu_init(mtu); + if (ret) + kfree(mtu->ep_array); + + return ret; +} + +static void mtu3_mem_free(struct mtu3 *mtu) +{ + mtu3_qmu_exit(mtu); + kfree(mtu->ep_array); +} + +static void mtu3_set_speed(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + + if (!mtu->is_u3_ip && (mtu->max_speed > USB_SPEED_HIGH)) + mtu->max_speed = USB_SPEED_HIGH; + + if (mtu->max_speed == USB_SPEED_FULL) { + /* disable U3 SS function */ + mtu3_clrbits(mbase, U3D_USB3_CONFIG, USB3_EN); + /* disable HS function */ + mtu3_clrbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE); + } else if (mtu->max_speed == USB_SPEED_HIGH) { + mtu3_clrbits(mbase, U3D_USB3_CONFIG, USB3_EN); + /* HS/FS detected by HW */ + mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE); + } + + dev_info(mtu->dev, "max_speed: %s\n", + usb_speed_string(mtu->max_speed)); +} + +static void mtu3_regs_init(struct mtu3 *mtu) +{ + + void __iomem *mbase = mtu->mac_base; + + /* be sure interrupts are disabled before registration of ISR */ + mtu3_intr_disable(mtu); + mtu3_intr_status_clear(mtu); + + if (mtu->is_u3_ip) { + /* disable LGO_U1/U2 by default */ + mtu3_clrbits(mbase, U3D_LINK_POWER_CONTROL, + SW_U1_ACCEPT_ENABLE | SW_U2_ACCEPT_ENABLE | + SW_U1_REQUEST_ENABLE | SW_U2_REQUEST_ENABLE); + /* device responses to u3_exit from host automatically */ + mtu3_clrbits(mbase, U3D_LTSSM_CTRL, SOFT_U3_EXIT_EN); + /* automatically build U2 link when U3 detect fail */ + mtu3_setbits(mbase, U3D_USB2_TEST_MODE, U2U3_AUTO_SWITCH); + } + + mtu3_set_speed(mtu); + + /* delay about 0.1us from detecting reset to send chirp-K */ + mtu3_clrbits(mbase, U3D_LINK_RESET_INFO, WTCHRP_MSK); + /* U2/U3 detected by HW */ + mtu3_writel(mbase, U3D_DEVICE_CONF, 0); + /* enable QMU 16B checksum */ + mtu3_setbits(mbase, U3D_QCR0, QMU_CS16B_EN); + /* vbus detected by HW */ + mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON); +} + +static irqreturn_t mtu3_link_isr(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + enum usb_device_speed udev_speed; + u32 maxpkt = 64; + u32 link; + u32 speed; + + link = mtu3_readl(mbase, U3D_DEV_LINK_INTR); + link &= mtu3_readl(mbase, U3D_DEV_LINK_INTR_ENABLE); + mtu3_writel(mbase, U3D_DEV_LINK_INTR, link); /* W1C */ + dev_dbg(mtu->dev, "=== LINK[%x] ===\n", link); + + if (!(link & SSUSB_DEV_SPEED_CHG_INTR)) + return IRQ_NONE; + + speed = SSUSB_DEV_SPEED(mtu3_readl(mbase, U3D_DEVICE_CONF)); + + switch (speed) { + case MTU3_SPEED_FULL: + udev_speed = USB_SPEED_FULL; + /*BESLCK = 4 < BESLCK_U3 = 10 < BESLDCK = 15 */ + mtu3_writel(mbase, U3D_USB20_LPM_PARAMETER, LPM_BESLDCK(0xf) + | LPM_BESLCK(4) | LPM_BESLCK_U3(0xa)); + mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, + LPM_BESL_STALL | LPM_BESLD_STALL); + break; + case MTU3_SPEED_HIGH: + udev_speed = USB_SPEED_HIGH; + /*BESLCK = 4 < BESLCK_U3 = 10 < BESLDCK = 15 */ + mtu3_writel(mbase, U3D_USB20_LPM_PARAMETER, LPM_BESLDCK(0xf) + | LPM_BESLCK(4) | LPM_BESLCK_U3(0xa)); + mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, + LPM_BESL_STALL | LPM_BESLD_STALL); + break; + case MTU3_SPEED_SUPER: + udev_speed = USB_SPEED_SUPER; + maxpkt = 512; + break; + default: + udev_speed = USB_SPEED_UNKNOWN; + break; + } + dev_dbg(mtu->dev, "%s: %s\n", __func__, usb_speed_string(udev_speed)); + + mtu->g.speed = udev_speed; + mtu->g.ep0->maxpacket = maxpkt; + mtu->ep0_state = MU3D_EP0_STATE_SETUP; + + if (udev_speed == USB_SPEED_UNKNOWN) + mtu3_gadget_disconnect(mtu); + else + mtu3_ep0_setup(mtu); + + return IRQ_HANDLED; +} + +static irqreturn_t mtu3_u3_ltssm_isr(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + u32 ltssm; + + ltssm = mtu3_readl(mbase, U3D_LTSSM_INTR); + ltssm &= mtu3_readl(mbase, U3D_LTSSM_INTR_ENABLE); + mtu3_writel(mbase, U3D_LTSSM_INTR, ltssm); /* W1C */ + dev_dbg(mtu->dev, "=== LTSSM[%x] ===\n", ltssm); + + if (ltssm & (HOT_RST_INTR | WARM_RST_INTR)) + mtu3_gadget_reset(mtu); + + if (ltssm & VBUS_FALL_INTR) + mtu3_ss_func_set(mtu, false); + + if (ltssm & VBUS_RISE_INTR) + mtu3_ss_func_set(mtu, true); + + if (ltssm & EXIT_U3_INTR) + mtu3_gadget_resume(mtu); + + if (ltssm & ENTER_U3_INTR) + mtu3_gadget_suspend(mtu); + + return IRQ_HANDLED; +} + +static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + u32 u2comm; + + u2comm = mtu3_readl(mbase, U3D_COMMON_USB_INTR); + u2comm &= mtu3_readl(mbase, U3D_COMMON_USB_INTR_ENABLE); + mtu3_writel(mbase, U3D_COMMON_USB_INTR, u2comm); /* W1C */ + dev_dbg(mtu->dev, "=== U2COMM[%x] ===\n", u2comm); + + if (u2comm & SUSPEND_INTR) + mtu3_gadget_suspend(mtu); + + if (u2comm & RESUME_INTR) + mtu3_gadget_resume(mtu); + + if (u2comm & RESET_INTR) + mtu3_gadget_reset(mtu); + + return IRQ_HANDLED; +} + +static irqreturn_t mtu3_irq(int irq, void *data) +{ + struct mtu3 *mtu = (struct mtu3 *)data; + unsigned long flags; + u32 level1; + + spin_lock_irqsave(&mtu->lock, flags); + + /* U3D_LV1ISR is RU */ + level1 = mtu3_readl(mtu->mac_base, U3D_LV1ISR); + level1 &= mtu3_readl(mtu->mac_base, U3D_LV1IER); + + if (level1 & EP_CTRL_INTR) + mtu3_link_isr(mtu); + + if (level1 & MAC2_INTR) + mtu3_u2_common_isr(mtu); + + if (level1 & MAC3_INTR) + mtu3_u3_ltssm_isr(mtu); + + if (level1 & BMU_INTR) + mtu3_ep0_isr(mtu); + + if (level1 & QMU_INTR) + mtu3_qmu_isr(mtu); + + spin_unlock_irqrestore(&mtu->lock, flags); + + return IRQ_HANDLED; +} + +static int mtu3_hw_init(struct mtu3 *mtu) +{ + u32 cap_dev; + int ret; + + mtu->hw_version = mtu3_readl(mtu->ippc_base, U3D_SSUSB_HW_ID); + + cap_dev = mtu3_readl(mtu->ippc_base, U3D_SSUSB_IP_DEV_CAP); + mtu->is_u3_ip = !!SSUSB_IP_DEV_U3_PORT_NUM(cap_dev); + + dev_info(mtu->dev, "IP version 0x%x(%s IP)\n", mtu->hw_version, + mtu->is_u3_ip ? "U3" : "U2"); + + mtu3_device_reset(mtu); + + ret = mtu3_device_enable(mtu); + if (ret) { + dev_err(mtu->dev, "device enable failed %d\n", ret); + return ret; + } + + ret = mtu3_mem_alloc(mtu); + if (ret) + return -ENOMEM; + + mtu3_regs_init(mtu); + + return 0; +} + +static void mtu3_hw_exit(struct mtu3 *mtu) +{ + mtu3_device_disable(mtu); + mtu3_mem_free(mtu); +} + +/*-------------------------------------------------------------------------*/ + +int ssusb_gadget_init(struct ssusb_mtk *ssusb) +{ + struct device *dev = ssusb->dev; + struct platform_device *pdev = to_platform_device(dev); + struct mtu3 *mtu = NULL; + struct resource *res; + int ret = -ENOMEM; + + mtu = devm_kzalloc(dev, sizeof(struct mtu3), GFP_KERNEL); + if (mtu == NULL) + return -ENOMEM; + + mtu->irq = platform_get_irq(pdev, 0); + if (mtu->irq <= 0) { + dev_err(dev, "fail to get irq number\n"); + return -ENODEV; + } + dev_info(dev, "irq %d\n", mtu->irq); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac"); + mtu->mac_base = devm_ioremap_resource(dev, res); + if (IS_ERR(mtu->mac_base)) { + dev_err(dev, "error mapping memory for dev mac\n"); + return PTR_ERR(mtu->mac_base); + } + + spin_lock_init(&mtu->lock); + mtu->dev = dev; + mtu->ippc_base = ssusb->ippc_base; + ssusb->mac_base = mtu->mac_base; + ssusb->u3d = mtu; + mtu->ssusb = ssusb; + mtu->max_speed = usb_get_maximum_speed(dev); + + /* check the max_speed parameter */ + switch (mtu->max_speed) { + case USB_SPEED_FULL: + case USB_SPEED_HIGH: + case USB_SPEED_SUPER: + break; + default: + dev_err(dev, "invalid max_speed: %s\n", + usb_speed_string(mtu->max_speed)); + /* fall through */ + case USB_SPEED_UNKNOWN: + /* default as SS */ + mtu->max_speed = USB_SPEED_SUPER; + break; + } + + dev_dbg(dev, "mac_base=0x%p, ippc_base=0x%p\n", + mtu->mac_base, mtu->ippc_base); + + ret = mtu3_hw_init(mtu); + if (ret) { + dev_err(dev, "mtu3 hw init failed:%d\n", ret); + return ret; + } + + ret = devm_request_irq(dev, mtu->irq, mtu3_irq, 0, dev_name(dev), mtu); + if (ret) { + dev_err(dev, "request irq %d failed!\n", mtu->irq); + goto irq_err; + } + + device_init_wakeup(dev, true); + + ret = mtu3_gadget_setup(mtu); + if (ret) { + dev_err(dev, "mtu3 gadget init failed:%d\n", ret); + goto gadget_err; + } + + /* init as host mode, power down device IP for power saving */ + if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG) + mtu3_stop(mtu); + + dev_dbg(dev, " %s() done...\n", __func__); + + return 0; + +gadget_err: + device_init_wakeup(dev, false); + +irq_err: + mtu3_hw_exit(mtu); + ssusb->u3d = NULL; + dev_err(dev, " %s() fail...\n", __func__); + + return ret; +} + +void ssusb_gadget_exit(struct ssusb_mtk *ssusb) +{ + struct mtu3 *mtu = ssusb->u3d; + + mtu3_gadget_cleanup(mtu); + device_init_wakeup(ssusb->dev, false); + mtu3_hw_exit(mtu); +} diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c new file mode 100644 index 000000000000..1a8987e7c5b0 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_dr.c @@ -0,0 +1,379 @@ +/* + * mtu3_dr.c - dual role switch and host glue layer + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include <linux/debugfs.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/of_device.h> +#include <linux/pinctrl/consumer.h> +#include <linux/seq_file.h> +#include <linux/uaccess.h> + +#include "mtu3.h" +#include "mtu3_dr.h" + +#define USB2_PORT 2 +#define USB3_PORT 3 + +enum mtu3_vbus_id_state { + MTU3_ID_FLOAT = 1, + MTU3_ID_GROUND, + MTU3_VBUS_OFF, + MTU3_VBUS_VALID, +}; + +static void toggle_opstate(struct ssusb_mtk *ssusb) +{ + if (!ssusb->otg_switch.is_u3_drd) { + mtu3_setbits(ssusb->mac_base, U3D_DEVICE_CONTROL, DC_SESSION); + mtu3_setbits(ssusb->mac_base, U3D_POWER_MANAGEMENT, SOFT_CONN); + } +} + +/* only port0 supports dual-role mode */ +static int ssusb_port0_switch(struct ssusb_mtk *ssusb, + int version, bool tohost) +{ + void __iomem *ibase = ssusb->ippc_base; + u32 value; + + dev_dbg(ssusb->dev, "%s (switch u%d port0 to %s)\n", __func__, + version, tohost ? "host" : "device"); + + if (version == USB2_PORT) { + /* 1. power off and disable u2 port0 */ + value = mtu3_readl(ibase, SSUSB_U2_CTRL(0)); + value |= SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS; + mtu3_writel(ibase, SSUSB_U2_CTRL(0), value); + + /* 2. power on, enable u2 port0 and select its mode */ + value = mtu3_readl(ibase, SSUSB_U2_CTRL(0)); + value &= ~(SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS); + value = tohost ? (value | SSUSB_U2_PORT_HOST_SEL) : + (value & (~SSUSB_U2_PORT_HOST_SEL)); + mtu3_writel(ibase, SSUSB_U2_CTRL(0), value); + } else { + /* 1. power off and disable u3 port0 */ + value = mtu3_readl(ibase, SSUSB_U3_CTRL(0)); + value |= SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS; + mtu3_writel(ibase, SSUSB_U3_CTRL(0), value); + + /* 2. power on, enable u3 port0 and select its mode */ + value = mtu3_readl(ibase, SSUSB_U3_CTRL(0)); + value &= ~(SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS); + value = tohost ? (value | SSUSB_U3_PORT_HOST_SEL) : + (value & (~SSUSB_U3_PORT_HOST_SEL)); + mtu3_writel(ibase, SSUSB_U3_CTRL(0), value); + } + + return 0; +} + +static void switch_port_to_host(struct ssusb_mtk *ssusb) +{ + u32 check_clk = 0; + + dev_dbg(ssusb->dev, "%s\n", __func__); + + ssusb_port0_switch(ssusb, USB2_PORT, true); + + if (ssusb->otg_switch.is_u3_drd) { + ssusb_port0_switch(ssusb, USB3_PORT, true); + check_clk = SSUSB_U3_MAC_RST_B_STS; + } + + ssusb_check_clocks(ssusb, check_clk); + + /* after all clocks are stable */ + toggle_opstate(ssusb); +} + +static void switch_port_to_device(struct ssusb_mtk *ssusb) +{ + u32 check_clk = 0; + + dev_dbg(ssusb->dev, "%s\n", __func__); + + ssusb_port0_switch(ssusb, USB2_PORT, false); + + if (ssusb->otg_switch.is_u3_drd) { + ssusb_port0_switch(ssusb, USB3_PORT, false); + check_clk = SSUSB_U3_MAC_RST_B_STS; + } + + ssusb_check_clocks(ssusb, check_clk); +} + +int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on) +{ + struct ssusb_mtk *ssusb = + container_of(otg_sx, struct ssusb_mtk, otg_switch); + struct regulator *vbus = otg_sx->vbus; + int ret; + + /* vbus is optional */ + if (!vbus) + return 0; + + dev_dbg(ssusb->dev, "%s: turn %s\n", __func__, is_on ? "on" : "off"); + + if (is_on) { + ret = regulator_enable(vbus); + if (ret) { + dev_err(ssusb->dev, "vbus regulator enable failed\n"); + return ret; + } + } else { + regulator_disable(vbus); + } + + return 0; +} + +/* + * switch to host: -> MTU3_VBUS_OFF --> MTU3_ID_GROUND + * switch to device: -> MTU3_ID_FLOAT --> MTU3_VBUS_VALID + */ +static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx, + enum mtu3_vbus_id_state status) +{ + struct ssusb_mtk *ssusb = + container_of(otg_sx, struct ssusb_mtk, otg_switch); + struct mtu3 *mtu = ssusb->u3d; + + dev_dbg(ssusb->dev, "mailbox state(%d)\n", status); + + switch (status) { + case MTU3_ID_GROUND: + switch_port_to_host(ssusb); + ssusb_set_vbus(otg_sx, 1); + ssusb->is_host = true; + break; + case MTU3_ID_FLOAT: + ssusb->is_host = false; + ssusb_set_vbus(otg_sx, 0); + switch_port_to_device(ssusb); + break; + case MTU3_VBUS_OFF: + mtu3_stop(mtu); + pm_relax(ssusb->dev); + break; + case MTU3_VBUS_VALID: + /* avoid suspend when works as device */ + pm_stay_awake(ssusb->dev); + mtu3_start(mtu); + break; + default: + dev_err(ssusb->dev, "invalid state\n"); + } +} + +static int ssusb_id_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct otg_switch_mtk *otg_sx = + container_of(nb, struct otg_switch_mtk, id_nb); + + if (event) + ssusb_set_mailbox(otg_sx, MTU3_ID_GROUND); + else + ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT); + + return NOTIFY_DONE; +} + +static int ssusb_vbus_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct otg_switch_mtk *otg_sx = + container_of(nb, struct otg_switch_mtk, vbus_nb); + + if (event) + ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID); + else + ssusb_set_mailbox(otg_sx, MTU3_VBUS_OFF); + + return NOTIFY_DONE; +} + +static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx) +{ + struct ssusb_mtk *ssusb = + container_of(otg_sx, struct ssusb_mtk, otg_switch); + struct extcon_dev *edev = otg_sx->edev; + int ret; + + /* extcon is optional */ + if (!edev) + return 0; + + otg_sx->vbus_nb.notifier_call = ssusb_vbus_notifier; + ret = extcon_register_notifier(edev, EXTCON_USB, + &otg_sx->vbus_nb); + if (ret < 0) + dev_err(ssusb->dev, "failed to register notifier for USB\n"); + + otg_sx->id_nb.notifier_call = ssusb_id_notifier; + ret = extcon_register_notifier(edev, EXTCON_USB_HOST, + &otg_sx->id_nb); + if (ret < 0) + dev_err(ssusb->dev, "failed to register notifier for USB-HOST\n"); + + dev_dbg(ssusb->dev, "EXTCON_USB: %d, EXTCON_USB_HOST: %d\n", + extcon_get_cable_state_(edev, EXTCON_USB), + extcon_get_cable_state_(edev, EXTCON_USB_HOST)); + + /* default as host, switch to device mode if needed */ + if (extcon_get_cable_state_(edev, EXTCON_USB_HOST) == false) + ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT); + if (extcon_get_cable_state_(edev, EXTCON_USB) == true) + ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID); + + return 0; +} + +static void extcon_register_dwork(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct otg_switch_mtk *otg_sx = + container_of(dwork, struct otg_switch_mtk, extcon_reg_dwork); + + ssusb_extcon_register(otg_sx); +} + +/* + * We provide an interface via debugfs to switch between host and device modes + * depending on user input. + * This is useful in special cases, such as uses TYPE-A receptacle but also + * wants to support dual-role mode. + * It generates cable state changes by pulling up/down IDPIN and + * notifies driver to switch mode by "extcon-usb-gpio". + * NOTE: when use MICRO receptacle, should not enable this interface. + */ +static void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host) +{ + struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + + if (to_host) + pinctrl_select_state(otg_sx->id_pinctrl, otg_sx->id_ground); + else + pinctrl_select_state(otg_sx->id_pinctrl, otg_sx->id_float); +} + + +static int ssusb_mode_show(struct seq_file *sf, void *unused) +{ + struct ssusb_mtk *ssusb = sf->private; + + seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n", + ssusb->is_host ? "host" : "device", + ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto"); + + return 0; +} + +static int ssusb_mode_open(struct inode *inode, struct file *file) +{ + return single_open(file, ssusb_mode_show, inode->i_private); +} + +static ssize_t ssusb_mode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *sf = file->private_data; + struct ssusb_mtk *ssusb = sf->private; + char buf[16]; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "host", 4) && !ssusb->is_host) { + ssusb_mode_manual_switch(ssusb, 1); + } else if (!strncmp(buf, "device", 6) && ssusb->is_host) { + ssusb_mode_manual_switch(ssusb, 0); + } else { + dev_err(ssusb->dev, "wrong or duplicated setting\n"); + return -EINVAL; + } + + return count; +} + +static const struct file_operations ssusb_mode_fops = { + .open = ssusb_mode_open, + .write = ssusb_mode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void ssusb_debugfs_init(struct ssusb_mtk *ssusb) +{ + struct dentry *root; + struct dentry *file; + + root = debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root); + if (IS_ERR_OR_NULL(root)) { + if (!root) + dev_err(ssusb->dev, "create debugfs root failed\n"); + return; + } + ssusb->dbgfs_root = root; + + file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, + ssusb, &ssusb_mode_fops); + if (!file) + dev_dbg(ssusb->dev, "create debugfs mode failed\n"); +} + +static void ssusb_debugfs_exit(struct ssusb_mtk *ssusb) +{ + debugfs_remove_recursive(ssusb->dbgfs_root); +} + +int ssusb_otg_switch_init(struct ssusb_mtk *ssusb) +{ + struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + + INIT_DELAYED_WORK(&otg_sx->extcon_reg_dwork, extcon_register_dwork); + + if (otg_sx->manual_drd_enabled) + ssusb_debugfs_init(ssusb); + + /* It is enough to delay 1s for waiting for host initialization */ + schedule_delayed_work(&otg_sx->extcon_reg_dwork, HZ); + + return 0; +} + +void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb) +{ + struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + + cancel_delayed_work(&otg_sx->extcon_reg_dwork); + + if (otg_sx->edev) { + extcon_unregister_notifier(otg_sx->edev, + EXTCON_USB, &otg_sx->vbus_nb); + extcon_unregister_notifier(otg_sx->edev, + EXTCON_USB_HOST, &otg_sx->id_nb); + } + + if (otg_sx->manual_drd_enabled) + ssusb_debugfs_exit(ssusb); +} diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h new file mode 100644 index 000000000000..9b228b5811b0 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_dr.h @@ -0,0 +1,108 @@ +/* + * mtu3_dr.h - dual role switch and host glue layer header + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#ifndef _MTU3_DR_H_ +#define _MTU3_DR_H_ + +#if IS_ENABLED(CONFIG_USB_MTU3_HOST) || IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE) + +int ssusb_host_init(struct ssusb_mtk *ssusb, struct device_node *parent_dn); +void ssusb_host_exit(struct ssusb_mtk *ssusb); +int ssusb_wakeup_of_property_parse(struct ssusb_mtk *ssusb, + struct device_node *dn); +int ssusb_host_enable(struct ssusb_mtk *ssusb); +int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend); +int ssusb_wakeup_enable(struct ssusb_mtk *ssusb); +void ssusb_wakeup_disable(struct ssusb_mtk *ssusb); + +#else + +static inline int ssusb_host_init(struct ssusb_mtk *ssusb, + + struct device_node *parent_dn) +{ + return 0; +} + +static inline void ssusb_host_exit(struct ssusb_mtk *ssusb) +{} + +static inline int ssusb_wakeup_of_property_parse( + struct ssusb_mtk *ssusb, struct device_node *dn) +{ + return 0; +} + +static inline int ssusb_host_enable(struct ssusb_mtk *ssusb) +{ + return 0; +} + +static inline int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) +{ + return 0; +} + +static inline int ssusb_wakeup_enable(struct ssusb_mtk *ssusb) +{ + return 0; +} + +static inline void ssusb_wakeup_disable(struct ssusb_mtk *ssusb) +{} + +#endif + + +#if IS_ENABLED(CONFIG_USB_MTU3_GADGET) || IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE) +int ssusb_gadget_init(struct ssusb_mtk *ssusb); +void ssusb_gadget_exit(struct ssusb_mtk *ssusb); +#else +static inline int ssusb_gadget_init(struct ssusb_mtk *ssusb) +{ + return 0; +} + +static inline void ssusb_gadget_exit(struct ssusb_mtk *ssusb) +{} +#endif + + +#if IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE) +int ssusb_otg_switch_init(struct ssusb_mtk *ssusb); +void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb); +int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on); + +#else + +static inline int ssusb_otg_switch_init(struct ssusb_mtk *ssusb) +{ + return 0; +} + +static inline void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb) +{} + +static inline int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on) +{ + return 0; +} + +#endif + +#endif /* _MTU3_DR_H_ */ diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c new file mode 100644 index 000000000000..9dd2441b4fa1 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -0,0 +1,730 @@ +/* + * mtu3_gadget.c - MediaTek usb3 DRD peripheral support + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include "mtu3.h" + +void mtu3_req_complete(struct mtu3_ep *mep, + struct usb_request *req, int status) +__releases(mep->mtu->lock) +__acquires(mep->mtu->lock) +{ + struct mtu3_request *mreq; + struct mtu3 *mtu; + int busy = mep->busy; + + mreq = to_mtu3_request(req); + list_del(&mreq->list); + if (mreq->request.status == -EINPROGRESS) + mreq->request.status = status; + + mtu = mreq->mtu; + mep->busy = 1; + spin_unlock(&mtu->lock); + + /* ep0 makes use of PIO, needn't unmap it */ + if (mep->epnum) + usb_gadget_unmap_request(&mtu->g, req, mep->is_in); + + dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", mep->name, + req, req->status, mreq->request.actual, mreq->request.length); + + usb_gadget_giveback_request(&mep->ep, &mreq->request); + + spin_lock(&mtu->lock); + mep->busy = busy; +} + +static void nuke(struct mtu3_ep *mep, const int status) +{ + struct mtu3_request *mreq = NULL; + + mep->busy = 1; + if (list_empty(&mep->req_list)) + return; + + dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); + + /* exclude EP0 */ + if (mep->epnum) + mtu3_qmu_flush(mep); + + while (!list_empty(&mep->req_list)) { + mreq = list_first_entry(&mep->req_list, + struct mtu3_request, list); + mtu3_req_complete(mep, &mreq->request, status); + } +} + +static int mtu3_ep_enable(struct mtu3_ep *mep) +{ + const struct usb_endpoint_descriptor *desc; + const struct usb_ss_ep_comp_descriptor *comp_desc; + struct mtu3 *mtu = mep->mtu; + u32 interval = 0; + u32 mult = 0; + u32 burst = 0; + int max_packet; + int ret; + + desc = mep->desc; + comp_desc = mep->comp_desc; + mep->type = usb_endpoint_type(desc); + max_packet = usb_endpoint_maxp(desc); + mep->maxp = max_packet & GENMASK(10, 0); + + switch (mtu->g.speed) { + case USB_SPEED_SUPER: + if (usb_endpoint_xfer_int(desc) || + usb_endpoint_xfer_isoc(desc)) { + interval = desc->bInterval; + interval = clamp_val(interval, 1, 16) - 1; + if (usb_endpoint_xfer_isoc(desc) && comp_desc) + mult = comp_desc->bmAttributes; + } + if (comp_desc) + burst = comp_desc->bMaxBurst; + + break; + case USB_SPEED_HIGH: + if (usb_endpoint_xfer_isoc(desc) || + usb_endpoint_xfer_int(desc)) { + interval = desc->bInterval; + interval = clamp_val(interval, 1, 16) - 1; + burst = (max_packet & GENMASK(12, 11)) >> 11; + } + break; + default: + break; /*others are ignored */ + } + + dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", + __func__, mep->maxp, interval, burst, mult); + + mep->ep.maxpacket = mep->maxp; + mep->ep.desc = desc; + mep->ep.comp_desc = comp_desc; + + /* slot mainly affects bulk/isoc transfer, so ignore int */ + mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; + + ret = mtu3_config_ep(mtu, mep, interval, burst, mult); + if (ret < 0) + return ret; + + ret = mtu3_gpd_ring_alloc(mep); + if (ret < 0) { + mtu3_deconfig_ep(mtu, mep); + return ret; + } + + mtu3_qmu_start(mep); + + return 0; +} + +static int mtu3_ep_disable(struct mtu3_ep *mep) +{ + struct mtu3 *mtu = mep->mtu; + + mtu3_qmu_stop(mep); + + /* abort all pending requests */ + nuke(mep, -ESHUTDOWN); + mtu3_deconfig_ep(mtu, mep); + mtu3_gpd_ring_free(mep); + + mep->desc = NULL; + mep->ep.desc = NULL; + mep->comp_desc = NULL; + mep->type = 0; + mep->flags = 0; + + return 0; +} + +static int mtu3_gadget_ep_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + struct mtu3_ep *mep; + struct mtu3 *mtu; + unsigned long flags; + int ret = -EINVAL; + + if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { + pr_debug("%s invalid parameters\n", __func__); + return -EINVAL; + } + + if (!desc->wMaxPacketSize) { + pr_debug("%s missing wMaxPacketSize\n", __func__); + return -EINVAL; + } + mep = to_mtu3_ep(ep); + mtu = mep->mtu; + + /* check ep number and direction against endpoint */ + if (usb_endpoint_num(desc) != mep->epnum) + return -EINVAL; + + if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) + return -EINVAL; + + dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); + + if (mep->flags & MTU3_EP_ENABLED) { + dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", + mep->name); + return 0; + } + + spin_lock_irqsave(&mtu->lock, flags); + mep->desc = desc; + mep->comp_desc = ep->comp_desc; + + ret = mtu3_ep_enable(mep); + if (ret) + goto error; + + mep->busy = 0; + mep->wedged = 0; + mep->flags |= MTU3_EP_ENABLED; + mtu->active_ep++; + +error: + spin_unlock_irqrestore(&mtu->lock, flags); + + dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); + + return ret; +} + +static int mtu3_gadget_ep_disable(struct usb_ep *ep) +{ + struct mtu3_ep *mep = to_mtu3_ep(ep); + struct mtu3 *mtu = mep->mtu; + unsigned long flags; + + dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); + + if (!(mep->flags & MTU3_EP_ENABLED)) { + dev_warn(mtu->dev, "%s is already disabled\n", mep->name); + return 0; + } + + spin_lock_irqsave(&mtu->lock, flags); + mtu3_ep_disable(mep); + mep->flags &= ~MTU3_EP_ENABLED; + mtu->active_ep--; + spin_unlock_irqrestore(&(mtu->lock), flags); + + dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", + __func__, mtu->active_ep, mtu->is_active); + + return 0; +} + +struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) +{ + struct mtu3_ep *mep = to_mtu3_ep(ep); + struct mtu3_request *mreq; + + mreq = kzalloc(sizeof(*mreq), gfp_flags); + if (!mreq) + return NULL; + + mreq->request.dma = DMA_ADDR_INVALID; + mreq->epnum = mep->epnum; + mreq->mep = mep; + + return &mreq->request; +} + +void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) +{ + kfree(to_mtu3_request(req)); +} + +static int mtu3_gadget_queue(struct usb_ep *ep, + struct usb_request *req, gfp_t gfp_flags) +{ + struct mtu3_ep *mep; + struct mtu3_request *mreq; + struct mtu3 *mtu; + unsigned long flags; + int ret = 0; + + if (!ep || !req) + return -EINVAL; + + if (!req->buf) + return -ENODATA; + + mep = to_mtu3_ep(ep); + mtu = mep->mtu; + mreq = to_mtu3_request(req); + mreq->mtu = mtu; + + if (mreq->mep != mep) + return -EINVAL; + + dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", + __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, + mreq, ep->maxpacket, mreq->request.length); + + if (req->length > GPD_BUF_SIZE) { + dev_warn(mtu->dev, + "req length > supported MAX:%d requested:%d\n", + GPD_BUF_SIZE, req->length); + return -EOPNOTSUPP; + } + + /* don't queue if the ep is down */ + if (!mep->desc) { + dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", + req, ep->name); + return -ESHUTDOWN; + } + + mreq->request.actual = 0; + mreq->request.status = -EINPROGRESS; + + ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); + if (ret) { + dev_err(mtu->dev, "dma mapping failed\n"); + return ret; + } + + spin_lock_irqsave(&mtu->lock, flags); + + if (mtu3_prepare_transfer(mep)) { + ret = -EAGAIN; + goto error; + } + + list_add_tail(&mreq->list, &mep->req_list); + mtu3_insert_gpd(mep, mreq); + mtu3_qmu_resume(mep); + +error: + spin_unlock_irqrestore(&mtu->lock, flags); + + return ret; +} + +static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) +{ + struct mtu3_ep *mep = to_mtu3_ep(ep); + struct mtu3_request *mreq = to_mtu3_request(req); + struct mtu3_request *r; + unsigned long flags; + int ret = 0; + struct mtu3 *mtu = mep->mtu; + + if (!ep || !req || mreq->mep != mep) + return -EINVAL; + + dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); + + spin_lock_irqsave(&mtu->lock, flags); + + list_for_each_entry(r, &mep->req_list, list) { + if (r == mreq) + break; + } + if (r != mreq) { + dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); + ret = -EINVAL; + goto done; + } + + mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ + mtu3_req_complete(mep, req, -ECONNRESET); + mtu3_qmu_start(mep); + +done: + spin_unlock_irqrestore(&mtu->lock, flags); + + return ret; +} + +/* + * Set or clear the halt bit of an EP. + * A halted EP won't TX/RX any data but will queue requests. + */ +static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) +{ + struct mtu3_ep *mep = to_mtu3_ep(ep); + struct mtu3 *mtu = mep->mtu; + struct mtu3_request *mreq; + unsigned long flags; + int ret = 0; + + if (!ep) + return -EINVAL; + + dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); + + spin_lock_irqsave(&mtu->lock, flags); + + if (mep->type == USB_ENDPOINT_XFER_ISOC) { + ret = -EINVAL; + goto done; + } + + mreq = next_request(mep); + if (value) { + /* + * If there is not request for TX-EP, QMU will not transfer + * data to TX-FIFO, so no need check whether TX-FIFO + * holds bytes or not here + */ + if (mreq) { + dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", + ep->name); + ret = -EAGAIN; + goto done; + } + } else { + mep->wedged = 0; + } + + dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); + + mtu3_ep_stall_set(mep, value); + +done: + spin_unlock_irqrestore(&mtu->lock, flags); + + return ret; +} + +/* Sets the halt feature with the clear requests ignored */ +static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) +{ + struct mtu3_ep *mep = to_mtu3_ep(ep); + + if (!ep) + return -EINVAL; + + mep->wedged = 1; + + return usb_ep_set_halt(ep); +} + +static const struct usb_ep_ops mtu3_ep_ops = { + .enable = mtu3_gadget_ep_enable, + .disable = mtu3_gadget_ep_disable, + .alloc_request = mtu3_alloc_request, + .free_request = mtu3_free_request, + .queue = mtu3_gadget_queue, + .dequeue = mtu3_gadget_dequeue, + .set_halt = mtu3_gadget_ep_set_halt, + .set_wedge = mtu3_gadget_ep_set_wedge, +}; + +static int mtu3_gadget_get_frame(struct usb_gadget *gadget) +{ + struct mtu3 *mtu = gadget_to_mtu3(gadget); + + return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); +} + +static int mtu3_gadget_wakeup(struct usb_gadget *gadget) +{ + struct mtu3 *mtu = gadget_to_mtu3(gadget); + unsigned long flags; + + dev_dbg(mtu->dev, "%s\n", __func__); + + /* remote wakeup feature is not enabled by host */ + if (!mtu->may_wakeup) + return -EOPNOTSUPP; + + spin_lock_irqsave(&mtu->lock, flags); + if (mtu->g.speed == USB_SPEED_SUPER) { + mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); + } else { + mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); + spin_unlock_irqrestore(&mtu->lock, flags); + usleep_range(10000, 11000); + spin_lock_irqsave(&mtu->lock, flags); + mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); + } + spin_unlock_irqrestore(&mtu->lock, flags); + return 0; +} + +static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, + int is_selfpowered) +{ + struct mtu3 *mtu = gadget_to_mtu3(gadget); + + mtu->is_self_powered = !!is_selfpowered; + return 0; +} + +static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) +{ + struct mtu3 *mtu = gadget_to_mtu3(gadget); + unsigned long flags; + + dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, + is_on ? "on" : "off", mtu->is_active ? "" : "in"); + + /* we'd rather not pullup unless the device is active. */ + spin_lock_irqsave(&mtu->lock, flags); + + is_on = !!is_on; + if (!mtu->is_active) { + /* save it for mtu3_start() to process the request */ + mtu->softconnect = is_on; + } else if (is_on != mtu->softconnect) { + mtu->softconnect = is_on; + mtu3_dev_on_off(mtu, is_on); + } + + spin_unlock_irqrestore(&mtu->lock, flags); + + return 0; +} + +static int mtu3_gadget_start(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + struct mtu3 *mtu = gadget_to_mtu3(gadget); + unsigned long flags; + + if (mtu->gadget_driver) { + dev_err(mtu->dev, "%s is already bound to %s\n", + mtu->g.name, mtu->gadget_driver->driver.name); + return -EBUSY; + } + + dev_dbg(mtu->dev, "bind driver %s\n", driver->function); + + spin_lock_irqsave(&mtu->lock, flags); + + mtu->softconnect = 0; + mtu->gadget_driver = driver; + + if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) + mtu3_start(mtu); + + spin_unlock_irqrestore(&mtu->lock, flags); + + return 0; +} + +static void stop_activity(struct mtu3 *mtu) +{ + struct usb_gadget_driver *driver = mtu->gadget_driver; + int i; + + /* don't disconnect if it's not connected */ + if (mtu->g.speed == USB_SPEED_UNKNOWN) + driver = NULL; + else + mtu->g.speed = USB_SPEED_UNKNOWN; + + /* deactivate the hardware */ + if (mtu->softconnect) { + mtu->softconnect = 0; + mtu3_dev_on_off(mtu, 0); + } + + /* + * killing any outstanding requests will quiesce the driver; + * then report disconnect + */ + nuke(mtu->ep0, -ESHUTDOWN); + for (i = 1; i < mtu->num_eps; i++) { + nuke(mtu->in_eps + i, -ESHUTDOWN); + nuke(mtu->out_eps + i, -ESHUTDOWN); + } + + if (driver) { + spin_unlock(&mtu->lock); + driver->disconnect(&mtu->g); + spin_lock(&mtu->lock); + } +} + +static int mtu3_gadget_stop(struct usb_gadget *g) +{ + struct mtu3 *mtu = gadget_to_mtu3(g); + unsigned long flags; + + dev_dbg(mtu->dev, "%s\n", __func__); + + spin_lock_irqsave(&mtu->lock, flags); + + stop_activity(mtu); + mtu->gadget_driver = NULL; + + if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) + mtu3_stop(mtu); + + spin_unlock_irqrestore(&mtu->lock, flags); + + return 0; +} + +static const struct usb_gadget_ops mtu3_gadget_ops = { + .get_frame = mtu3_gadget_get_frame, + .wakeup = mtu3_gadget_wakeup, + .set_selfpowered = mtu3_gadget_set_self_powered, + .pullup = mtu3_gadget_pullup, + .udc_start = mtu3_gadget_start, + .udc_stop = mtu3_gadget_stop, +}; + +static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep, + u32 epnum, u32 is_in) +{ + mep->epnum = epnum; + mep->mtu = mtu; + mep->is_in = is_in; + + INIT_LIST_HEAD(&mep->req_list); + + sprintf(mep->name, "ep%d%s", epnum, + !epnum ? "" : (is_in ? "in" : "out")); + + mep->ep.name = mep->name; + INIT_LIST_HEAD(&mep->ep.ep_list); + + /* initialize maxpacket as SS */ + if (!epnum) { + usb_ep_set_maxpacket_limit(&mep->ep, 512); + mep->ep.caps.type_control = true; + mep->ep.ops = &mtu3_ep0_ops; + mtu->g.ep0 = &mep->ep; + } else { + usb_ep_set_maxpacket_limit(&mep->ep, 1024); + mep->ep.caps.type_iso = true; + mep->ep.caps.type_bulk = true; + mep->ep.caps.type_int = true; + mep->ep.ops = &mtu3_ep_ops; + list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list); + } + + dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name, + mep->ep.maxpacket); + + if (!epnum) { + mep->ep.caps.dir_in = true; + mep->ep.caps.dir_out = true; + } else if (is_in) { + mep->ep.caps.dir_in = true; + } else { + mep->ep.caps.dir_out = true; + } +} + +static void mtu3_gadget_init_eps(struct mtu3 *mtu) +{ + u8 epnum; + + /* initialize endpoint list just once */ + INIT_LIST_HEAD(&(mtu->g.ep_list)); + + dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n", + __func__, mtu->num_eps); + + init_hw_ep(mtu, mtu->ep0, 0, 0); + for (epnum = 1; epnum < mtu->num_eps; epnum++) { + init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1); + init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0); + } +} + +int mtu3_gadget_setup(struct mtu3 *mtu) +{ + int ret; + + mtu->g.ops = &mtu3_gadget_ops; + mtu->g.max_speed = mtu->max_speed; + mtu->g.speed = USB_SPEED_UNKNOWN; + mtu->g.sg_supported = 0; + mtu->g.name = MTU3_DRIVER_NAME; + mtu->is_active = 0; + + mtu3_gadget_init_eps(mtu); + + ret = usb_add_gadget_udc(mtu->dev, &mtu->g); + if (ret) { + dev_err(mtu->dev, "failed to register udc\n"); + return ret; + } + + usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); + + return 0; +} + +void mtu3_gadget_cleanup(struct mtu3 *mtu) +{ + usb_del_gadget_udc(&mtu->g); +} + +void mtu3_gadget_resume(struct mtu3 *mtu) +{ + dev_dbg(mtu->dev, "gadget RESUME\n"); + if (mtu->gadget_driver && mtu->gadget_driver->resume) { + spin_unlock(&mtu->lock); + mtu->gadget_driver->resume(&mtu->g); + spin_lock(&mtu->lock); + } +} + +/* called when SOF packets stop for 3+ msec or enters U3 */ +void mtu3_gadget_suspend(struct mtu3 *mtu) +{ + dev_dbg(mtu->dev, "gadget SUSPEND\n"); + if (mtu->gadget_driver && mtu->gadget_driver->suspend) { + spin_unlock(&mtu->lock); + mtu->gadget_driver->suspend(&mtu->g); + spin_lock(&mtu->lock); + } +} + +/* called when VBUS drops below session threshold, and in other cases */ +void mtu3_gadget_disconnect(struct mtu3 *mtu) +{ + dev_dbg(mtu->dev, "gadget DISCONNECT\n"); + if (mtu->gadget_driver && mtu->gadget_driver->disconnect) { + spin_unlock(&mtu->lock); + mtu->gadget_driver->disconnect(&mtu->g); + spin_lock(&mtu->lock); + } + + usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); +} + +void mtu3_gadget_reset(struct mtu3 *mtu) +{ + dev_dbg(mtu->dev, "gadget RESET\n"); + + /* report disconnect, if we didn't flush EP state */ + if (mtu->g.speed != USB_SPEED_UNKNOWN) + mtu3_gadget_disconnect(mtu); + + mtu->address = 0; + mtu->ep0_state = MU3D_EP0_STATE_SETUP; + mtu->may_wakeup = 0; +} diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c new file mode 100644 index 000000000000..2d7427b48775 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c @@ -0,0 +1,881 @@ +/* + * mtu3_gadget_ep0.c - MediaTek USB3 DRD peripheral driver ep0 handling + * + * Copyright (c) 2016 MediaTek Inc. + * + * Author: Chunfeng.Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include "mtu3.h" + +/* ep0 is always mtu3->in_eps[0] */ +#define next_ep0_request(mtu) next_request((mtu)->ep0) + +/* for high speed test mode; see USB 2.0 spec 7.1.20 */ +static const u8 mtu3_test_packet[53] = { + /* implicit SYNC then DATA0 to start */ + + /* JKJKJKJK x9 */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* JJKKJJKK x8 */ + 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, + /* JJJJKKKK x8 */ + 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, + /* JJJJJJJKKKKKKK x8 */ + 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + /* JJJJJJJK x8 */ + 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, + /* JKKKKKKK x10, JK */ + 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e, + /* implicit CRC16 then EOP to end */ +}; + +static char *decode_ep0_state(struct mtu3 *mtu) +{ + switch (mtu->ep0_state) { + case MU3D_EP0_STATE_SETUP: + return "SETUP"; + case MU3D_EP0_STATE_TX: + return "IN"; + case MU3D_EP0_STATE_RX: + return "OUT"; + case MU3D_EP0_STATE_TX_END: + return "TX-END"; + case MU3D_EP0_STATE_STALL: + return "STALL"; + default: + return "??"; + } +} + +static void ep0_req_giveback(struct mtu3 *mtu, struct usb_request *req) +{ + mtu3_req_complete(mtu->ep0, req, 0); +} + +static int +forward_to_driver(struct mtu3 *mtu, const struct usb_ctrlrequest *setup) +__releases(mtu->lock) +__acquires(mtu->lock) +{ + int ret; + + if (!mtu->gadget_driver) + return -EOPNOTSUPP; + + spin_unlock(&mtu->lock); + ret = mtu->gadget_driver->setup(&mtu->g, setup); + spin_lock(&mtu->lock); + + dev_dbg(mtu->dev, "%s ret %d\n", __func__, ret); + return ret; +} + +static void ep0_write_fifo(struct mtu3_ep *mep, const u8 *src, u16 len) +{ + void __iomem *fifo = mep->mtu->mac_base + U3D_FIFO0; + u16 index = 0; + + dev_dbg(mep->mtu->dev, "%s: ep%din, len=%d, buf=%p\n", + __func__, mep->epnum, len, src); + + if (len >= 4) { + iowrite32_rep(fifo, src, len >> 2); + index = len & ~0x03; + } + if (len & 0x02) { + writew(*(u16 *)&src[index], fifo); + index += 2; + } + if (len & 0x01) + writeb(src[index], fifo); +} + +static void ep0_read_fifo(struct mtu3_ep *mep, u8 *dst, u16 len) +{ + void __iomem *fifo = mep->mtu->mac_base + U3D_FIFO0; + u32 value; + u16 index = 0; + + dev_dbg(mep->mtu->dev, "%s: ep%dout len=%d buf=%p\n", + __func__, mep->epnum, len, dst); + + if (len >= 4) { + ioread32_rep(fifo, dst, len >> 2); + index = len & ~0x03; + } + if (len & 0x3) { + value = readl(fifo); + memcpy(&dst[index], &value, len & 0x3); + } + +} + +static void ep0_load_test_packet(struct mtu3 *mtu) +{ + /* + * because the length of test packet is less than max packet of HS ep0, + * write it into fifo directly. + */ + ep0_write_fifo(mtu->ep0, mtu3_test_packet, sizeof(mtu3_test_packet)); +} + +/* + * A. send STALL for setup transfer without data stage: + * set SENDSTALL and SETUPPKTRDY at the same time; + * B. send STALL for other cases: + * set SENDSTALL only. + */ +static void ep0_stall_set(struct mtu3_ep *mep0, bool set, u32 pktrdy) +{ + struct mtu3 *mtu = mep0->mtu; + void __iomem *mbase = mtu->mac_base; + u32 csr; + + /* EP0_SENTSTALL is W1C */ + csr = mtu3_readl(mbase, U3D_EP0CSR) & EP0_W1C_BITS; + if (set) + csr |= EP0_SENDSTALL | pktrdy; + else + csr = (csr & ~EP0_SENDSTALL) | EP0_SENTSTALL; + mtu3_writel(mtu->mac_base, U3D_EP0CSR, csr); + + mtu->ep0_state = MU3D_EP0_STATE_SETUP; + + dev_dbg(mtu->dev, "ep0: %s STALL, ep0_state: %s\n", + set ? "SEND" : "CLEAR", decode_ep0_state(mtu)); +} + +static int ep0_queue(struct mtu3_ep *mep0, struct mtu3_request *mreq); + +static void ep0_dummy_complete(struct usb_ep *ep, struct usb_request *req) +{} + +static void ep0_set_sel_complete(struct usb_ep *ep, struct usb_request *req) +{ + struct mtu3_request *mreq; + struct mtu3 *mtu; + struct usb_set_sel_req sel; + + memcpy(&sel, req->buf, sizeof(sel)); + + mreq = to_mtu3_request(req); + mtu = mreq->mtu; + dev_dbg(mtu->dev, "u1sel:%d, u1pel:%d, u2sel:%d, u2pel:%d\n", + sel.u1_sel, sel.u1_pel, sel.u2_sel, sel.u2_pel); +} + +/* queue data stage to handle 6 byte SET_SEL request */ +static int ep0_set_sel(struct mtu3 *mtu, struct usb_ctrlrequest *setup) +{ + int ret; + u16 length = le16_to_cpu(setup->wLength); + + if (unlikely(length != 6)) { + dev_err(mtu->dev, "%s wrong wLength:%d\n", + __func__, length); + return -EINVAL; + } + + mtu->ep0_req.mep = mtu->ep0; + mtu->ep0_req.request.length = 6; + mtu->ep0_req.request.buf = mtu->setup_buf; + mtu->ep0_req.request.complete = ep0_set_sel_complete; + ret = ep0_queue(mtu->ep0, &mtu->ep0_req); + + return ret < 0 ? ret : 1; +} + +static int +ep0_get_status(struct mtu3 *mtu, const struct usb_ctrlrequest *setup) +{ + struct mtu3_ep *mep = NULL; + int handled = 1; + u8 result[2] = {0, 0}; + u8 epnum = 0; + int is_in; + + switch (setup->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + result[0] = mtu->is_self_powered << USB_DEVICE_SELF_POWERED; + result[0] |= mtu->may_wakeup << USB_DEVICE_REMOTE_WAKEUP; + /* superspeed only */ + if (mtu->g.speed == USB_SPEED_SUPER) { + result[0] |= mtu->u1_enable << USB_DEV_STAT_U1_ENABLED; + result[0] |= mtu->u2_enable << USB_DEV_STAT_U2_ENABLED; + } + + dev_dbg(mtu->dev, "%s result=%x, U1=%x, U2=%x\n", __func__, + result[0], mtu->u1_enable, mtu->u2_enable); + + break; + case USB_RECIP_INTERFACE: + break; + case USB_RECIP_ENDPOINT: + epnum = (u8) le16_to_cpu(setup->wIndex); + is_in = epnum & USB_DIR_IN; + epnum &= USB_ENDPOINT_NUMBER_MASK; + + if (epnum >= mtu->num_eps) { + handled = -EINVAL; + break; + } + if (!epnum) + break; + + mep = (is_in ? mtu->in_eps : mtu->out_eps) + epnum; + if (!mep->desc) { + handled = -EINVAL; + break; + } + if (mep->flags & MTU3_EP_STALL) + result[0] |= 1 << USB_ENDPOINT_HALT; + + break; + default: + /* class, vendor, etc ... delegate */ + handled = 0; + break; + } + + if (handled > 0) { + int ret; + + /* prepare a data stage for GET_STATUS */ + dev_dbg(mtu->dev, "get_status=%x\n", *(u16 *)result); + memcpy(mtu->setup_buf, result, sizeof(result)); + mtu->ep0_req.mep = mtu->ep0; + mtu->ep0_req.request.length = 2; + mtu->ep0_req.request.buf = &mtu->setup_buf; + mtu->ep0_req.request.complete = ep0_dummy_complete; + ret = ep0_queue(mtu->ep0, &mtu->ep0_req); + if (ret < 0) + handled = ret; + } + return handled; +} + +static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup) +{ + void __iomem *mbase = mtu->mac_base; + int handled = 1; + + switch (le16_to_cpu(setup->wIndex) >> 8) { + case TEST_J: + dev_dbg(mtu->dev, "TEST_J\n"); + mtu->test_mode_nr = TEST_J_MODE; + break; + case TEST_K: + dev_dbg(mtu->dev, "TEST_K\n"); + mtu->test_mode_nr = TEST_K_MODE; + break; + case TEST_SE0_NAK: + dev_dbg(mtu->dev, "TEST_SE0_NAK\n"); + mtu->test_mode_nr = TEST_SE0_NAK_MODE; + break; + case TEST_PACKET: + dev_dbg(mtu->dev, "TEST_PACKET\n"); + mtu->test_mode_nr = TEST_PACKET_MODE; + break; + default: + handled = -EINVAL; + goto out; + } + + mtu->test_mode = true; + + /* no TX completion interrupt, and need restart platform after test */ + if (mtu->test_mode_nr == TEST_PACKET_MODE) + ep0_load_test_packet(mtu); + + mtu3_writel(mbase, U3D_USB2_TEST_MODE, mtu->test_mode_nr); + + mtu->ep0_state = MU3D_EP0_STATE_SETUP; + +out: + return handled; +} + +static int ep0_handle_feature_dev(struct mtu3 *mtu, + struct usb_ctrlrequest *setup, bool set) +{ + void __iomem *mbase = mtu->mac_base; + int handled = -EINVAL; + u32 lpc; + + switch (le16_to_cpu(setup->wValue)) { + case USB_DEVICE_REMOTE_WAKEUP: + mtu->may_wakeup = !!set; + handled = 1; + break; + case USB_DEVICE_TEST_MODE: + if (!set || (mtu->g.speed != USB_SPEED_HIGH) || + (le16_to_cpu(setup->wIndex) & 0xff)) + break; + + handled = handle_test_mode(mtu, setup); + break; + case USB_DEVICE_U1_ENABLE: + if (mtu->g.speed != USB_SPEED_SUPER || + mtu->g.state != USB_STATE_CONFIGURED) + break; + + lpc = mtu3_readl(mbase, U3D_LINK_POWER_CONTROL); + if (set) + lpc |= SW_U1_ACCEPT_ENABLE; + else + lpc &= ~SW_U1_ACCEPT_ENABLE; + mtu3_writel(mbase, U3D_LINK_POWER_CONTROL, lpc); + + mtu->u1_enable = !!set; + handled = 1; + break; + case USB_DEVICE_U2_ENABLE: + if (mtu->g.speed != USB_SPEED_SUPER || + mtu->g.state != USB_STATE_CONFIGURED) + break; + + lpc = mtu3_readl(mbase, U3D_LINK_POWER_CONTROL); + if (set) + lpc |= SW_U2_ACCEPT_ENABLE; + else + lpc &= ~SW_U2_ACCEPT_ENABLE; + mtu3_writel(mbase, U3D_LINK_POWER_CONTROL, lpc); + + mtu->u2_enable = !!set; + handled = 1; + break; + default: + handled = -EINVAL; + break; + } + return handled; +} + +static int ep0_handle_feature(struct mtu3 *mtu, + struct usb_ctrlrequest *setup, bool set) +{ + struct mtu3_ep *mep; + int handled = -EINVAL; + int is_in; + u16 value; + u16 index; + u8 epnum; + + value = le16_to_cpu(setup->wValue); + index = le16_to_cpu(setup->wIndex); + + switch (setup->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + handled = ep0_handle_feature_dev(mtu, setup, set); + break; + case USB_RECIP_INTERFACE: + /* superspeed only */ + if ((value == USB_INTRF_FUNC_SUSPEND) + && (mtu->g.speed == USB_SPEED_SUPER)) { + /* + * forward the request because function drivers + * should handle it + */ + handled = 0; + } + break; + case USB_RECIP_ENDPOINT: + epnum = index & USB_ENDPOINT_NUMBER_MASK; + if (epnum == 0 || epnum >= mtu->num_eps || + value != USB_ENDPOINT_HALT) + break; + + is_in = index & USB_DIR_IN; + mep = (is_in ? mtu->in_eps : mtu->out_eps) + epnum; + if (!mep->desc) + break; + + handled = 1; + /* ignore request if endpoint is wedged */ + if (mep->wedged) + break; + + mtu3_ep_stall_set(mep, set); + break; + default: + /* class, vendor, etc ... delegate */ + handled = 0; + break; + } + return handled; +} + +/* + * handle all control requests can be handled + * returns: + * negative errno - error happened + * zero - need delegate SETUP to gadget driver + * positive - already handled + */ +static int handle_standard_request(struct mtu3 *mtu, + struct usb_ctrlrequest *setup) +{ + void __iomem *mbase = mtu->mac_base; + enum usb_device_state state = mtu->g.state; + int handled = -EINVAL; + u32 dev_conf; + u16 value; + + value = le16_to_cpu(setup->wValue); + + /* the gadget driver handles everything except what we must handle */ + switch (setup->bRequest) { + case USB_REQ_SET_ADDRESS: + /* change it after the status stage */ + mtu->address = (u8) (value & 0x7f); + dev_dbg(mtu->dev, "set address to 0x%x\n", mtu->address); + + dev_conf = mtu3_readl(mbase, U3D_DEVICE_CONF); + dev_conf &= ~DEV_ADDR_MSK; + dev_conf |= DEV_ADDR(mtu->address); + mtu3_writel(mbase, U3D_DEVICE_CONF, dev_conf); + + if (mtu->address) + usb_gadget_set_state(&mtu->g, USB_STATE_ADDRESS); + else + usb_gadget_set_state(&mtu->g, USB_STATE_DEFAULT); + + handled = 1; + break; + case USB_REQ_SET_CONFIGURATION: + if (state == USB_STATE_ADDRESS) { + usb_gadget_set_state(&mtu->g, + USB_STATE_CONFIGURED); + } else if (state == USB_STATE_CONFIGURED) { + /* + * USB2 spec sec 9.4.7, if wValue is 0 then dev + * is moved to addressed state + */ + if (!value) + usb_gadget_set_state(&mtu->g, + USB_STATE_ADDRESS); + } + handled = 0; + break; + case USB_REQ_CLEAR_FEATURE: + handled = ep0_handle_feature(mtu, setup, 0); + break; + case USB_REQ_SET_FEATURE: + handled = ep0_handle_feature(mtu, setup, 1); + break; + case USB_REQ_GET_STATUS: + handled = ep0_get_status(mtu, setup); + break; + case USB_REQ_SET_SEL: + handled = ep0_set_sel(mtu, setup); + break; + case USB_REQ_SET_ISOCH_DELAY: + handled = 1; + break; + default: + /* delegate SET_CONFIGURATION, etc */ + handled = 0; + } + + return handled; +} + +/* receive an data packet (OUT) */ +static void ep0_rx_state(struct mtu3 *mtu) +{ + struct mtu3_request *mreq; + struct usb_request *req; + void __iomem *mbase = mtu->mac_base; + u32 maxp; + u32 csr; + u16 count = 0; + + dev_dbg(mtu->dev, "%s\n", __func__); + + csr = mtu3_readl(mbase, U3D_EP0CSR) & EP0_W1C_BITS; + mreq = next_ep0_request(mtu); + req = &mreq->request; + + /* read packet and ack; or stall because of gadget driver bug */ + if (req) { + void *buf = req->buf + req->actual; + unsigned int len = req->length - req->actual; + + /* read the buffer */ + count = mtu3_readl(mbase, U3D_RXCOUNT0); + if (count > len) { + req->status = -EOVERFLOW; + count = len; + } + ep0_read_fifo(mtu->ep0, buf, count); + req->actual += count; + csr |= EP0_RXPKTRDY; + + maxp = mtu->g.ep0->maxpacket; + if (count < maxp || req->actual == req->length) { + mtu->ep0_state = MU3D_EP0_STATE_SETUP; + dev_dbg(mtu->dev, "ep0 state: %s\n", + decode_ep0_state(mtu)); + + csr |= EP0_DATAEND; + } else { + req = NULL; + } + } else { + csr |= EP0_RXPKTRDY | EP0_SENDSTALL; + dev_dbg(mtu->dev, "%s: SENDSTALL\n", __func__); + } + + mtu3_writel(mbase, U3D_EP0CSR, csr); + + /* give back the request if have received all data */ + if (req) + ep0_req_giveback(mtu, req); + +} + +/* transmitting to the host (IN) */ +static void ep0_tx_state(struct mtu3 *mtu) +{ + struct mtu3_request *mreq = next_ep0_request(mtu); + struct usb_request *req; + u32 csr; + u8 *src; + u8 count; + u32 maxp; + + dev_dbg(mtu->dev, "%s\n", __func__); + + if (!mreq) + return; + + maxp = mtu->g.ep0->maxpacket; + req = &mreq->request; + + /* load the data */ + src = (u8 *)req->buf + req->actual; + count = min(maxp, req->length - req->actual); + if (count) + ep0_write_fifo(mtu->ep0, src, count); + + dev_dbg(mtu->dev, "%s act=%d, len=%d, cnt=%d, maxp=%d zero=%d\n", + __func__, req->actual, req->length, count, maxp, req->zero); + + req->actual += count; + + if ((count < maxp) + || ((req->actual == req->length) && !req->zero)) + mtu->ep0_state = MU3D_EP0_STATE_TX_END; + + /* send it out, triggering a "txpktrdy cleared" irq */ + csr = mtu3_readl(mtu->mac_base, U3D_EP0CSR) & EP0_W1C_BITS; + mtu3_writel(mtu->mac_base, U3D_EP0CSR, csr | EP0_TXPKTRDY); + + dev_dbg(mtu->dev, "%s ep0csr=0x%x\n", __func__, + mtu3_readl(mtu->mac_base, U3D_EP0CSR)); +} + +static void ep0_read_setup(struct mtu3 *mtu, struct usb_ctrlrequest *setup) +{ + struct mtu3_request *mreq; + u32 count; + u32 csr; + + csr = mtu3_readl(mtu->mac_base, U3D_EP0CSR) & EP0_W1C_BITS; + count = mtu3_readl(mtu->mac_base, U3D_RXCOUNT0); + + ep0_read_fifo(mtu->ep0, (u8 *)setup, count); + + dev_dbg(mtu->dev, "SETUP req%02x.%02x v%04x i%04x l%04x\n", + setup->bRequestType, setup->bRequest, + le16_to_cpu(setup->wValue), le16_to_cpu(setup->wIndex), + le16_to_cpu(setup->wLength)); + + /* clean up any leftover transfers */ + mreq = next_ep0_request(mtu); + if (mreq) + ep0_req_giveback(mtu, &mreq->request); + + if (le16_to_cpu(setup->wLength) == 0) { + ; /* no data stage, nothing to do */ + } else if (setup->bRequestType & USB_DIR_IN) { + mtu3_writel(mtu->mac_base, U3D_EP0CSR, + csr | EP0_SETUPPKTRDY | EP0_DPHTX); + mtu->ep0_state = MU3D_EP0_STATE_TX; + } else { + mtu3_writel(mtu->mac_base, U3D_EP0CSR, + (csr | EP0_SETUPPKTRDY) & (~EP0_DPHTX)); + mtu->ep0_state = MU3D_EP0_STATE_RX; + } +} + +static int ep0_handle_setup(struct mtu3 *mtu) +__releases(mtu->lock) +__acquires(mtu->lock) +{ + struct usb_ctrlrequest setup; + struct mtu3_request *mreq; + void __iomem *mbase = mtu->mac_base; + int handled = 0; + + ep0_read_setup(mtu, &setup); + + if ((setup.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + handled = handle_standard_request(mtu, &setup); + + dev_dbg(mtu->dev, "handled %d, ep0_state: %s\n", + handled, decode_ep0_state(mtu)); + + if (handled < 0) + goto stall; + else if (handled > 0) + goto finish; + + handled = forward_to_driver(mtu, &setup); + if (handled < 0) { +stall: + dev_dbg(mtu->dev, "%s stall (%d)\n", __func__, handled); + + ep0_stall_set(mtu->ep0, true, + le16_to_cpu(setup.wLength) ? 0 : EP0_SETUPPKTRDY); + + return 0; + } + +finish: + if (mtu->test_mode) { + ; /* nothing to do */ + } else if (le16_to_cpu(setup.wLength) == 0) { /* no data stage */ + + mtu3_writel(mbase, U3D_EP0CSR, + (mtu3_readl(mbase, U3D_EP0CSR) & EP0_W1C_BITS) + | EP0_SETUPPKTRDY | EP0_DATAEND); + + /* complete zlp request directly */ + mreq = next_ep0_request(mtu); + if (mreq && !mreq->request.length) + ep0_req_giveback(mtu, &mreq->request); + } + + return 0; +} + +irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + struct mtu3_request *mreq; + u32 int_status; + irqreturn_t ret = IRQ_NONE; + u32 csr; + u32 len; + + int_status = mtu3_readl(mbase, U3D_EPISR); + int_status &= mtu3_readl(mbase, U3D_EPIER); + mtu3_writel(mbase, U3D_EPISR, int_status); /* W1C */ + + /* only handle ep0's */ + if (!(int_status & EP0ISR)) + return IRQ_NONE; + + csr = mtu3_readl(mbase, U3D_EP0CSR); + + dev_dbg(mtu->dev, "%s csr=0x%x\n", __func__, csr); + + /* we sent a stall.. need to clear it now.. */ + if (csr & EP0_SENTSTALL) { + ep0_stall_set(mtu->ep0, false, 0); + csr = mtu3_readl(mbase, U3D_EP0CSR); + ret = IRQ_HANDLED; + } + dev_dbg(mtu->dev, "ep0_state: %s\n", decode_ep0_state(mtu)); + + switch (mtu->ep0_state) { + case MU3D_EP0_STATE_TX: + /* irq on clearing txpktrdy */ + if ((csr & EP0_FIFOFULL) == 0) { + ep0_tx_state(mtu); + ret = IRQ_HANDLED; + } + break; + case MU3D_EP0_STATE_RX: + /* irq on set rxpktrdy */ + if (csr & EP0_RXPKTRDY) { + ep0_rx_state(mtu); + ret = IRQ_HANDLED; + } + break; + case MU3D_EP0_STATE_TX_END: + mtu3_writel(mbase, U3D_EP0CSR, + (csr & EP0_W1C_BITS) | EP0_DATAEND); + + mreq = next_ep0_request(mtu); + if (mreq) + ep0_req_giveback(mtu, &mreq->request); + + mtu->ep0_state = MU3D_EP0_STATE_SETUP; + ret = IRQ_HANDLED; + dev_dbg(mtu->dev, "ep0_state: %s\n", decode_ep0_state(mtu)); + break; + case MU3D_EP0_STATE_SETUP: + if (!(csr & EP0_SETUPPKTRDY)) + break; + + len = mtu3_readl(mbase, U3D_RXCOUNT0); + if (len != 8) { + dev_err(mtu->dev, "SETUP packet len %d != 8 ?\n", len); + break; + } + + ep0_handle_setup(mtu); + ret = IRQ_HANDLED; + break; + default: + /* can't happen */ + ep0_stall_set(mtu->ep0, true, 0); + WARN_ON(1); + break; + } + + return ret; +} + + +static int mtu3_ep0_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + /* always enabled */ + return -EINVAL; +} + +static int mtu3_ep0_disable(struct usb_ep *ep) +{ + /* always enabled */ + return -EINVAL; +} + +static int ep0_queue(struct mtu3_ep *mep, struct mtu3_request *mreq) +{ + struct mtu3 *mtu = mep->mtu; + + mreq->mtu = mtu; + mreq->request.actual = 0; + mreq->request.status = -EINPROGRESS; + + dev_dbg(mtu->dev, "%s %s (ep0_state: %s), len#%d\n", __func__, + mep->name, decode_ep0_state(mtu), mreq->request.length); + + if (!list_empty(&mep->req_list)) + return -EBUSY; + + switch (mtu->ep0_state) { + case MU3D_EP0_STATE_SETUP: + case MU3D_EP0_STATE_RX: /* control-OUT data */ + case MU3D_EP0_STATE_TX: /* control-IN data */ + break; + default: + dev_err(mtu->dev, "%s, error in ep0 state %s\n", __func__, + decode_ep0_state(mtu)); + return -EINVAL; + } + + list_add_tail(&mreq->list, &mep->req_list); + + /* sequence #1, IN ... start writing the data */ + if (mtu->ep0_state == MU3D_EP0_STATE_TX) + ep0_tx_state(mtu); + + return 0; +} + +static int mtu3_ep0_queue(struct usb_ep *ep, + struct usb_request *req, gfp_t gfp) +{ + struct mtu3_ep *mep; + struct mtu3_request *mreq; + struct mtu3 *mtu; + unsigned long flags; + int ret = 0; + + if (!ep || !req) + return -EINVAL; + + mep = to_mtu3_ep(ep); + mtu = mep->mtu; + mreq = to_mtu3_request(req); + + spin_lock_irqsave(&mtu->lock, flags); + ret = ep0_queue(mep, mreq); + spin_unlock_irqrestore(&mtu->lock, flags); + return ret; +} + +static int mtu3_ep0_dequeue(struct usb_ep *ep, struct usb_request *req) +{ + /* we just won't support this */ + return -EINVAL; +} + +static int mtu3_ep0_halt(struct usb_ep *ep, int value) +{ + struct mtu3_ep *mep; + struct mtu3 *mtu; + unsigned long flags; + int ret = 0; + + if (!ep || !value) + return -EINVAL; + + mep = to_mtu3_ep(ep); + mtu = mep->mtu; + + dev_dbg(mtu->dev, "%s\n", __func__); + + spin_lock_irqsave(&mtu->lock, flags); + + if (!list_empty(&mep->req_list)) { + ret = -EBUSY; + goto cleanup; + } + + switch (mtu->ep0_state) { + /* + * stalls are usually issued after parsing SETUP packet, either + * directly in irq context from setup() or else later. + */ + case MU3D_EP0_STATE_TX: + case MU3D_EP0_STATE_TX_END: + case MU3D_EP0_STATE_RX: + case MU3D_EP0_STATE_SETUP: + ep0_stall_set(mtu->ep0, true, 0); + break; + default: + dev_dbg(mtu->dev, "ep0 can't halt in state %s\n", + decode_ep0_state(mtu)); + ret = -EINVAL; + } + +cleanup: + spin_unlock_irqrestore(&mtu->lock, flags); + return ret; +} + +const struct usb_ep_ops mtu3_ep0_ops = { + .enable = mtu3_ep0_enable, + .disable = mtu3_ep0_disable, + .alloc_request = mtu3_alloc_request, + .free_request = mtu3_free_request, + .queue = mtu3_ep0_queue, + .dequeue = mtu3_ep0_dequeue, + .set_halt = mtu3_ep0_halt, +}; diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c new file mode 100644 index 000000000000..cd4d01087855 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_host.c @@ -0,0 +1,294 @@ +/* + * mtu3_dr.c - dual role switch and host glue layer + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include <linux/clk.h> +#include <linux/iopoll.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/of_device.h> +#include <linux/regmap.h> + +#include "mtu3.h" +#include "mtu3_dr.h" + +#define PERI_WK_CTRL1 0x404 +#define UWK_CTL1_IS_C(x) (((x) & 0xf) << 26) +#define UWK_CTL1_IS_E BIT(25) +#define UWK_CTL1_IDDIG_C(x) (((x) & 0xf) << 11) /* cycle debounce */ +#define UWK_CTL1_IDDIG_E BIT(10) /* enable debounce */ +#define UWK_CTL1_IDDIG_P BIT(9) /* polarity */ +#define UWK_CTL1_IS_P BIT(6) /* polarity for ip sleep */ + +/* + * ip-sleep wakeup mode: + * all clocks can be turn off, but power domain should be kept on + */ +static void ssusb_wakeup_ip_sleep_en(struct ssusb_mtk *ssusb) +{ + u32 tmp; + struct regmap *pericfg = ssusb->pericfg; + + regmap_read(pericfg, PERI_WK_CTRL1, &tmp); + tmp &= ~UWK_CTL1_IS_P; + tmp &= ~(UWK_CTL1_IS_C(0xf)); + tmp |= UWK_CTL1_IS_C(0x8); + regmap_write(pericfg, PERI_WK_CTRL1, tmp); + regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_IS_E); + + regmap_read(pericfg, PERI_WK_CTRL1, &tmp); + dev_dbg(ssusb->dev, "%s(): WK_CTRL1[P6,E25,C26:29]=%#x\n", + __func__, tmp); +} + +static void ssusb_wakeup_ip_sleep_dis(struct ssusb_mtk *ssusb) +{ + u32 tmp; + + regmap_read(ssusb->pericfg, PERI_WK_CTRL1, &tmp); + tmp &= ~UWK_CTL1_IS_E; + regmap_write(ssusb->pericfg, PERI_WK_CTRL1, tmp); +} + +int ssusb_wakeup_of_property_parse(struct ssusb_mtk *ssusb, + struct device_node *dn) +{ + struct device *dev = ssusb->dev; + + /* + * Wakeup function is optional, so it is not an error if this property + * does not exist, and in such case, no need to get relative + * properties anymore. + */ + ssusb->wakeup_en = of_property_read_bool(dn, "mediatek,enable-wakeup"); + if (!ssusb->wakeup_en) + return 0; + + ssusb->wk_deb_p0 = devm_clk_get(dev, "wakeup_deb_p0"); + if (IS_ERR(ssusb->wk_deb_p0)) { + dev_err(dev, "fail to get wakeup_deb_p0\n"); + return PTR_ERR(ssusb->wk_deb_p0); + } + + if (of_property_read_bool(dn, "wakeup_deb_p1")) { + ssusb->wk_deb_p1 = devm_clk_get(dev, "wakeup_deb_p1"); + if (IS_ERR(ssusb->wk_deb_p1)) { + dev_err(dev, "fail to get wakeup_deb_p1\n"); + return PTR_ERR(ssusb->wk_deb_p1); + } + } + + ssusb->pericfg = syscon_regmap_lookup_by_phandle(dn, + "mediatek,syscon-wakeup"); + if (IS_ERR(ssusb->pericfg)) { + dev_err(dev, "fail to get pericfg regs\n"); + return PTR_ERR(ssusb->pericfg); + } + + return 0; +} + +static int ssusb_wakeup_clks_enable(struct ssusb_mtk *ssusb) +{ + int ret; + + ret = clk_prepare_enable(ssusb->wk_deb_p0); + if (ret) { + dev_err(ssusb->dev, "failed to enable wk_deb_p0\n"); + goto usb_p0_err; + } + + ret = clk_prepare_enable(ssusb->wk_deb_p1); + if (ret) { + dev_err(ssusb->dev, "failed to enable wk_deb_p1\n"); + goto usb_p1_err; + } + + return 0; + +usb_p1_err: + clk_disable_unprepare(ssusb->wk_deb_p0); +usb_p0_err: + return -EINVAL; +} + +static void ssusb_wakeup_clks_disable(struct ssusb_mtk *ssusb) +{ + clk_disable_unprepare(ssusb->wk_deb_p1); + clk_disable_unprepare(ssusb->wk_deb_p0); +} + +static void host_ports_num_get(struct ssusb_mtk *ssusb) +{ + u32 xhci_cap; + + xhci_cap = mtu3_readl(ssusb->ippc_base, U3D_SSUSB_IP_XHCI_CAP); + ssusb->u2_ports = SSUSB_IP_XHCI_U2_PORT_NUM(xhci_cap); + ssusb->u3_ports = SSUSB_IP_XHCI_U3_PORT_NUM(xhci_cap); + + dev_dbg(ssusb->dev, "host - u2_ports:%d, u3_ports:%d\n", + ssusb->u2_ports, ssusb->u3_ports); +} + +/* only configure ports will be used later */ +int ssusb_host_enable(struct ssusb_mtk *ssusb) +{ + void __iomem *ibase = ssusb->ippc_base; + int num_u3p = ssusb->u3_ports; + int num_u2p = ssusb->u2_ports; + u32 check_clk; + u32 value; + int i; + + /* power on host ip */ + mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN); + + /* power on and enable all u3 ports */ + for (i = 0; i < num_u3p; i++) { + value = mtu3_readl(ibase, SSUSB_U3_CTRL(i)); + value &= ~(SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS); + value |= SSUSB_U3_PORT_HOST_SEL; + mtu3_writel(ibase, SSUSB_U3_CTRL(i), value); + } + + /* power on and enable all u2 ports */ + for (i = 0; i < num_u2p; i++) { + value = mtu3_readl(ibase, SSUSB_U2_CTRL(i)); + value &= ~(SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS); + value |= SSUSB_U2_PORT_HOST_SEL; + mtu3_writel(ibase, SSUSB_U2_CTRL(i), value); + } + + check_clk = SSUSB_XHCI_RST_B_STS; + if (num_u3p) + check_clk = SSUSB_U3_MAC_RST_B_STS; + + return ssusb_check_clocks(ssusb, check_clk); +} + +int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) +{ + void __iomem *ibase = ssusb->ippc_base; + int num_u3p = ssusb->u3_ports; + int num_u2p = ssusb->u2_ports; + u32 value; + int ret; + int i; + + /* power down and disable all u3 ports */ + for (i = 0; i < num_u3p; i++) { + value = mtu3_readl(ibase, SSUSB_U3_CTRL(i)); + value |= SSUSB_U3_PORT_PDN; + value |= suspend ? 0 : SSUSB_U3_PORT_DIS; + mtu3_writel(ibase, SSUSB_U3_CTRL(i), value); + } + + /* power down and disable all u2 ports */ + for (i = 0; i < num_u2p; i++) { + value = mtu3_readl(ibase, SSUSB_U2_CTRL(i)); + value |= SSUSB_U2_PORT_PDN; + value |= suspend ? 0 : SSUSB_U2_PORT_DIS; + mtu3_writel(ibase, SSUSB_U2_CTRL(i), value); + } + + /* power down host ip */ + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN); + + if (!suspend) + return 0; + + /* wait for host ip to sleep */ + ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value, + (value & SSUSB_IP_SLEEP_STS), 100, 100000); + if (ret) + dev_err(ssusb->dev, "ip sleep failed!!!\n"); + + return ret; +} + +static void ssusb_host_setup(struct ssusb_mtk *ssusb) +{ + host_ports_num_get(ssusb); + + /* + * power on host and power on/enable all ports + * if support OTG, gadget driver will switch port0 to device mode + */ + ssusb_host_enable(ssusb); + + /* if port0 supports dual-role, works as host mode by default */ + ssusb_set_vbus(&ssusb->otg_switch, 1); +} + +static void ssusb_host_cleanup(struct ssusb_mtk *ssusb) +{ + if (ssusb->is_host) + ssusb_set_vbus(&ssusb->otg_switch, 0); + + ssusb_host_disable(ssusb, false); +} + +/* + * If host supports multiple ports, the VBUSes(5V) of ports except port0 + * which supports OTG are better to be enabled by default in DTS. + * Because the host driver will keep link with devices attached when system + * enters suspend mode, so no need to control VBUSes after initialization. + */ +int ssusb_host_init(struct ssusb_mtk *ssusb, struct device_node *parent_dn) +{ + struct device *parent_dev = ssusb->dev; + int ret; + + ssusb_host_setup(ssusb); + + ret = of_platform_populate(parent_dn, NULL, NULL, parent_dev); + if (ret) { + dev_dbg(parent_dev, "failed to create child devices at %s\n", + parent_dn->full_name); + return ret; + } + + dev_info(parent_dev, "xHCI platform device register success...\n"); + + return 0; +} + +void ssusb_host_exit(struct ssusb_mtk *ssusb) +{ + of_platform_depopulate(ssusb->dev); + ssusb_host_cleanup(ssusb); +} + +int ssusb_wakeup_enable(struct ssusb_mtk *ssusb) +{ + int ret = 0; + + if (ssusb->wakeup_en) { + ret = ssusb_wakeup_clks_enable(ssusb); + ssusb_wakeup_ip_sleep_en(ssusb); + } + return ret; +} + +void ssusb_wakeup_disable(struct ssusb_mtk *ssusb) +{ + if (ssusb->wakeup_en) { + ssusb_wakeup_ip_sleep_dis(ssusb); + ssusb_wakeup_clks_disable(ssusb); + } +} diff --git a/drivers/usb/mtu3/mtu3_hw_regs.h b/drivers/usb/mtu3/mtu3_hw_regs.h new file mode 100644 index 000000000000..212367295276 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_hw_regs.h @@ -0,0 +1,473 @@ +/* + * mtu3_hw_regs.h - MediaTek USB3 DRD register and field definitions + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#ifndef _SSUSB_HW_REGS_H_ +#define _SSUSB_HW_REGS_H_ + +/* segment offset of MAC register */ +#define SSUSB_DEV_BASE 0x0000 +#define SSUSB_EPCTL_CSR_BASE 0x0800 +#define SSUSB_USB3_MAC_CSR_BASE 0x1400 +#define SSUSB_USB3_SYS_CSR_BASE 0x1400 +#define SSUSB_USB2_CSR_BASE 0x2400 + +/* IPPC register in Infra */ +#define SSUSB_SIFSLV_IPPC_BASE 0x0000 + +/* --------------- SSUSB_DEV REGISTER DEFINITION --------------- */ + +#define U3D_LV1ISR (SSUSB_DEV_BASE + 0x0000) +#define U3D_LV1IER (SSUSB_DEV_BASE + 0x0004) +#define U3D_LV1IESR (SSUSB_DEV_BASE + 0x0008) +#define U3D_LV1IECR (SSUSB_DEV_BASE + 0x000C) + +#define U3D_EPISR (SSUSB_DEV_BASE + 0x0080) +#define U3D_EPIER (SSUSB_DEV_BASE + 0x0084) +#define U3D_EPIESR (SSUSB_DEV_BASE + 0x0088) +#define U3D_EPIECR (SSUSB_DEV_BASE + 0x008C) + +#define U3D_EP0CSR (SSUSB_DEV_BASE + 0x0100) +#define U3D_RXCOUNT0 (SSUSB_DEV_BASE + 0x0108) +#define U3D_RESERVED (SSUSB_DEV_BASE + 0x010C) +#define U3D_TX1CSR0 (SSUSB_DEV_BASE + 0x0110) +#define U3D_TX1CSR1 (SSUSB_DEV_BASE + 0x0114) +#define U3D_TX1CSR2 (SSUSB_DEV_BASE + 0x0118) + +#define U3D_RX1CSR0 (SSUSB_DEV_BASE + 0x0210) +#define U3D_RX1CSR1 (SSUSB_DEV_BASE + 0x0214) +#define U3D_RX1CSR2 (SSUSB_DEV_BASE + 0x0218) + +#define U3D_FIFO0 (SSUSB_DEV_BASE + 0x0300) + +#define U3D_QCR0 (SSUSB_DEV_BASE + 0x0400) +#define U3D_QCR1 (SSUSB_DEV_BASE + 0x0404) +#define U3D_QCR2 (SSUSB_DEV_BASE + 0x0408) +#define U3D_QCR3 (SSUSB_DEV_BASE + 0x040C) + +#define U3D_TXQCSR1 (SSUSB_DEV_BASE + 0x0510) +#define U3D_TXQSAR1 (SSUSB_DEV_BASE + 0x0514) +#define U3D_TXQCPR1 (SSUSB_DEV_BASE + 0x0518) + +#define U3D_RXQCSR1 (SSUSB_DEV_BASE + 0x0610) +#define U3D_RXQSAR1 (SSUSB_DEV_BASE + 0x0614) +#define U3D_RXQCPR1 (SSUSB_DEV_BASE + 0x0618) +#define U3D_RXQLDPR1 (SSUSB_DEV_BASE + 0x061C) + +#define U3D_QISAR0 (SSUSB_DEV_BASE + 0x0700) +#define U3D_QIER0 (SSUSB_DEV_BASE + 0x0704) +#define U3D_QIESR0 (SSUSB_DEV_BASE + 0x0708) +#define U3D_QIECR0 (SSUSB_DEV_BASE + 0x070C) +#define U3D_QISAR1 (SSUSB_DEV_BASE + 0x0710) +#define U3D_QIER1 (SSUSB_DEV_BASE + 0x0714) +#define U3D_QIESR1 (SSUSB_DEV_BASE + 0x0718) +#define U3D_QIECR1 (SSUSB_DEV_BASE + 0x071C) + +#define U3D_TQERRIR0 (SSUSB_DEV_BASE + 0x0780) +#define U3D_TQERRIER0 (SSUSB_DEV_BASE + 0x0784) +#define U3D_TQERRIESR0 (SSUSB_DEV_BASE + 0x0788) +#define U3D_TQERRIECR0 (SSUSB_DEV_BASE + 0x078C) +#define U3D_RQERRIR0 (SSUSB_DEV_BASE + 0x07C0) +#define U3D_RQERRIER0 (SSUSB_DEV_BASE + 0x07C4) +#define U3D_RQERRIESR0 (SSUSB_DEV_BASE + 0x07C8) +#define U3D_RQERRIECR0 (SSUSB_DEV_BASE + 0x07CC) +#define U3D_RQERRIR1 (SSUSB_DEV_BASE + 0x07D0) +#define U3D_RQERRIER1 (SSUSB_DEV_BASE + 0x07D4) +#define U3D_RQERRIESR1 (SSUSB_DEV_BASE + 0x07D8) +#define U3D_RQERRIECR1 (SSUSB_DEV_BASE + 0x07DC) + +#define U3D_CAP_EP0FFSZ (SSUSB_DEV_BASE + 0x0C04) +#define U3D_CAP_EPNTXFFSZ (SSUSB_DEV_BASE + 0x0C08) +#define U3D_CAP_EPNRXFFSZ (SSUSB_DEV_BASE + 0x0C0C) +#define U3D_CAP_EPINFO (SSUSB_DEV_BASE + 0x0C10) +#define U3D_MISC_CTRL (SSUSB_DEV_BASE + 0x0C84) + +/*---------------- SSUSB_DEV FIELD DEFINITION ---------------*/ + +/* U3D_LV1ISR */ +#define EP_CTRL_INTR BIT(5) +#define MAC2_INTR BIT(4) +#define DMA_INTR BIT(3) +#define MAC3_INTR BIT(2) +#define QMU_INTR BIT(1) +#define BMU_INTR BIT(0) + +/* U3D_LV1IECR */ +#define LV1IECR_MSK GENMASK(31, 0) + +/* U3D_EPISR */ +#define EPRISR(x) (BIT(16) << (x)) +#define EPTISR(x) (BIT(0) << (x)) +#define EP0ISR BIT(0) + +/* U3D_EP0CSR */ +#define EP0_SENDSTALL BIT(25) +#define EP0_FIFOFULL BIT(23) +#define EP0_SENTSTALL BIT(22) +#define EP0_DPHTX BIT(20) +#define EP0_DATAEND BIT(19) +#define EP0_TXPKTRDY BIT(18) +#define EP0_SETUPPKTRDY BIT(17) +#define EP0_RXPKTRDY BIT(16) +#define EP0_MAXPKTSZ_MSK GENMASK(9, 0) +#define EP0_MAXPKTSZ(x) ((x) & EP0_MAXPKTSZ_MSK) +#define EP0_W1C_BITS (~(EP0_RXPKTRDY | EP0_SETUPPKTRDY | EP0_SENTSTALL)) + +/* U3D_TX1CSR0 */ +#define TX_DMAREQEN BIT(29) +#define TX_FIFOFULL BIT(25) +#define TX_FIFOEMPTY BIT(24) +#define TX_SENTSTALL BIT(22) +#define TX_SENDSTALL BIT(21) +#define TX_TXPKTRDY BIT(16) +#define TX_TXMAXPKTSZ_MSK GENMASK(10, 0) +#define TX_TXMAXPKTSZ(x) ((x) & TX_TXMAXPKTSZ_MSK) +#define TX_W1C_BITS (~(TX_SENTSTALL)) + +/* U3D_TX1CSR1 */ +#define TX_MULT(x) (((x) & 0x3) << 22) +#define TX_MAX_PKT(x) (((x) & 0x3f) << 16) +#define TX_SLOT(x) (((x) & 0x3f) << 8) +#define TX_TYPE(x) (((x) & 0x3) << 4) +#define TX_SS_BURST(x) (((x) & 0xf) << 0) + +/* for TX_TYPE & RX_TYPE */ +#define TYPE_BULK (0x0) +#define TYPE_INT (0x1) +#define TYPE_ISO (0x2) +#define TYPE_MASK (0x3) + +/* U3D_TX1CSR2 */ +#define TX_BINTERVAL(x) (((x) & 0xff) << 24) +#define TX_FIFOSEGSIZE(x) (((x) & 0xf) << 16) +#define TX_FIFOADDR(x) (((x) & 0x1fff) << 0) + +/* U3D_RX1CSR0 */ +#define RX_DMAREQEN BIT(29) +#define RX_SENTSTALL BIT(22) +#define RX_SENDSTALL BIT(21) +#define RX_RXPKTRDY BIT(16) +#define RX_RXMAXPKTSZ_MSK GENMASK(10, 0) +#define RX_RXMAXPKTSZ(x) ((x) & RX_RXMAXPKTSZ_MSK) +#define RX_W1C_BITS (~(RX_SENTSTALL | RX_RXPKTRDY)) + +/* U3D_RX1CSR1 */ +#define RX_MULT(x) (((x) & 0x3) << 22) +#define RX_MAX_PKT(x) (((x) & 0x3f) << 16) +#define RX_SLOT(x) (((x) & 0x3f) << 8) +#define RX_TYPE(x) (((x) & 0x3) << 4) +#define RX_SS_BURST(x) (((x) & 0xf) << 0) + +/* U3D_RX1CSR2 */ +#define RX_BINTERVAL(x) (((x) & 0xff) << 24) +#define RX_FIFOSEGSIZE(x) (((x) & 0xf) << 16) +#define RX_FIFOADDR(x) (((x) & 0x1fff) << 0) + +/* U3D_QCR0 */ +#define QMU_RX_CS_EN(x) (BIT(16) << (x)) +#define QMU_TX_CS_EN(x) (BIT(0) << (x)) +#define QMU_CS16B_EN BIT(0) + +/* U3D_QCR1 */ +#define QMU_TX_ZLP(x) (BIT(0) << (x)) + +/* U3D_QCR3 */ +#define QMU_RX_COZ(x) (BIT(16) << (x)) +#define QMU_RX_ZLP(x) (BIT(0) << (x)) + +/* U3D_TXQCSR1 */ +/* U3D_RXQCSR1 */ +#define QMU_Q_ACTIVE BIT(15) +#define QMU_Q_STOP BIT(2) +#define QMU_Q_RESUME BIT(1) +#define QMU_Q_START BIT(0) + +/* U3D_QISAR0, U3D_QIER0, U3D_QIESR0, U3D_QIECR0 */ +#define QMU_RX_DONE_INT(x) (BIT(16) << (x)) +#define QMU_TX_DONE_INT(x) (BIT(0) << (x)) + +/* U3D_QISAR1, U3D_QIER1, U3D_QIESR1, U3D_QIECR1 */ +#define RXQ_ZLPERR_INT BIT(20) +#define RXQ_LENERR_INT BIT(18) +#define RXQ_CSERR_INT BIT(17) +#define RXQ_EMPTY_INT BIT(16) +#define TXQ_LENERR_INT BIT(2) +#define TXQ_CSERR_INT BIT(1) +#define TXQ_EMPTY_INT BIT(0) + +/* U3D_TQERRIR0, U3D_TQERRIER0, U3D_TQERRIESR0, U3D_TQERRIECR0 */ +#define QMU_TX_LEN_ERR(x) (BIT(16) << (x)) +#define QMU_TX_CS_ERR(x) (BIT(0) << (x)) + +/* U3D_RQERRIR0, U3D_RQERRIER0, U3D_RQERRIESR0, U3D_RQERRIECR0 */ +#define QMU_RX_LEN_ERR(x) (BIT(16) << (x)) +#define QMU_RX_CS_ERR(x) (BIT(0) << (x)) + +/* U3D_RQERRIR1, U3D_RQERRIER1, U3D_RQERRIESR1, U3D_RQERRIECR1 */ +#define QMU_RX_ZLP_ERR(n) (BIT(16) << (n)) + +/* U3D_CAP_EPINFO */ +#define CAP_RX_EP_NUM(x) (((x) >> 8) & 0x1f) +#define CAP_TX_EP_NUM(x) ((x) & 0x1f) + +/* U3D_MISC_CTRL */ +#define VBUS_ON BIT(1) +#define VBUS_FRC_EN BIT(0) + + +/*---------------- SSUSB_EPCTL_CSR REGISTER DEFINITION ----------------*/ + +#define U3D_DEVICE_CONF (SSUSB_EPCTL_CSR_BASE + 0x0000) +#define U3D_EP_RST (SSUSB_EPCTL_CSR_BASE + 0x0004) + +#define U3D_DEV_LINK_INTR_ENABLE (SSUSB_EPCTL_CSR_BASE + 0x0050) +#define U3D_DEV_LINK_INTR (SSUSB_EPCTL_CSR_BASE + 0x0054) + +/*---------------- SSUSB_EPCTL_CSR FIELD DEFINITION ----------------*/ + +/* U3D_DEVICE_CONF */ +#define DEV_ADDR_MSK GENMASK(30, 24) +#define DEV_ADDR(x) ((0x7f & (x)) << 24) +#define HW_USB2_3_SEL BIT(18) +#define SW_USB2_3_SEL_EN BIT(17) +#define SW_USB2_3_SEL BIT(16) +#define SSUSB_DEV_SPEED(x) ((x) & 0x7) + +/* U3D_EP_RST */ +#define EP1_IN_RST BIT(17) +#define EP1_OUT_RST BIT(1) +#define EP_RST(is_in, epnum) (((is_in) ? BIT(16) : BIT(0)) << (epnum)) +#define EP0_RST BIT(0) + +/* U3D_DEV_LINK_INTR_ENABLE */ +/* U3D_DEV_LINK_INTR */ +#define SSUSB_DEV_SPEED_CHG_INTR BIT(0) + + +/*---------------- SSUSB_USB3_MAC_CSR REGISTER DEFINITION ----------------*/ + +#define U3D_LTSSM_CTRL (SSUSB_USB3_MAC_CSR_BASE + 0x0010) +#define U3D_USB3_CONFIG (SSUSB_USB3_MAC_CSR_BASE + 0x001C) + +#define U3D_LTSSM_INTR_ENABLE (SSUSB_USB3_MAC_CSR_BASE + 0x013C) +#define U3D_LTSSM_INTR (SSUSB_USB3_MAC_CSR_BASE + 0x0140) + +/*---------------- SSUSB_USB3_MAC_CSR FIELD DEFINITION ----------------*/ + +/* U3D_LTSSM_CTRL */ +#define FORCE_POLLING_FAIL BIT(4) +#define FORCE_RXDETECT_FAIL BIT(3) +#define SOFT_U3_EXIT_EN BIT(2) +#define COMPLIANCE_EN BIT(1) +#define U1_GO_U2_EN BIT(0) + +/* U3D_USB3_CONFIG */ +#define USB3_EN BIT(0) + +/* U3D_LTSSM_INTR_ENABLE */ +/* U3D_LTSSM_INTR */ +#define U3_RESUME_INTR BIT(18) +#define U3_LFPS_TMOUT_INTR BIT(17) +#define VBUS_FALL_INTR BIT(16) +#define VBUS_RISE_INTR BIT(15) +#define RXDET_SUCCESS_INTR BIT(14) +#define EXIT_U3_INTR BIT(13) +#define EXIT_U2_INTR BIT(12) +#define EXIT_U1_INTR BIT(11) +#define ENTER_U3_INTR BIT(10) +#define ENTER_U2_INTR BIT(9) +#define ENTER_U1_INTR BIT(8) +#define ENTER_U0_INTR BIT(7) +#define RECOVERY_INTR BIT(6) +#define WARM_RST_INTR BIT(5) +#define HOT_RST_INTR BIT(4) +#define LOOPBACK_INTR BIT(3) +#define COMPLIANCE_INTR BIT(2) +#define SS_DISABLE_INTR BIT(1) +#define SS_INACTIVE_INTR BIT(0) + +/*---------------- SSUSB_USB3_SYS_CSR REGISTER DEFINITION ----------------*/ + +#define U3D_LINK_UX_INACT_TIMER (SSUSB_USB3_SYS_CSR_BASE + 0x020C) +#define U3D_LINK_POWER_CONTROL (SSUSB_USB3_SYS_CSR_BASE + 0x0210) +#define U3D_LINK_ERR_COUNT (SSUSB_USB3_SYS_CSR_BASE + 0x0214) + +/*---------------- SSUSB_USB3_SYS_CSR FIELD DEFINITION ----------------*/ + +/* U3D_LINK_UX_INACT_TIMER */ +#define DEV_U2_INACT_TIMEOUT_MSK GENMASK(23, 16) +#define DEV_U2_INACT_TIMEOUT_VALUE(x) (((x) & 0xff) << 16) +#define U2_INACT_TIMEOUT_MSK GENMASK(15, 8) +#define U1_INACT_TIMEOUT_MSK GENMASK(7, 0) +#define U1_INACT_TIMEOUT_VALUE(x) ((x) & 0xff) + +/* U3D_LINK_POWER_CONTROL */ +#define SW_U2_ACCEPT_ENABLE BIT(9) +#define SW_U1_ACCEPT_ENABLE BIT(8) +#define UX_EXIT BIT(5) +#define LGO_U3 BIT(4) +#define LGO_U2 BIT(3) +#define LGO_U1 BIT(2) +#define SW_U2_REQUEST_ENABLE BIT(1) +#define SW_U1_REQUEST_ENABLE BIT(0) + +/* U3D_LINK_ERR_COUNT */ +#define CLR_LINK_ERR_CNT BIT(16) +#define LINK_ERROR_COUNT GENMASK(15, 0) + +/*---------------- SSUSB_USB2_CSR REGISTER DEFINITION ----------------*/ + +#define U3D_POWER_MANAGEMENT (SSUSB_USB2_CSR_BASE + 0x0004) +#define U3D_DEVICE_CONTROL (SSUSB_USB2_CSR_BASE + 0x000C) +#define U3D_USB2_TEST_MODE (SSUSB_USB2_CSR_BASE + 0x0014) +#define U3D_COMMON_USB_INTR_ENABLE (SSUSB_USB2_CSR_BASE + 0x0018) +#define U3D_COMMON_USB_INTR (SSUSB_USB2_CSR_BASE + 0x001C) +#define U3D_LINK_RESET_INFO (SSUSB_USB2_CSR_BASE + 0x0024) +#define U3D_USB20_FRAME_NUM (SSUSB_USB2_CSR_BASE + 0x003C) +#define U3D_USB20_LPM_PARAMETER (SSUSB_USB2_CSR_BASE + 0x0044) +#define U3D_USB20_MISC_CONTROL (SSUSB_USB2_CSR_BASE + 0x004C) + +/*---------------- SSUSB_USB2_CSR FIELD DEFINITION ----------------*/ + +/* U3D_POWER_MANAGEMENT */ +#define LPM_BESL_STALL BIT(14) +#define LPM_BESLD_STALL BIT(13) +#define LPM_RWP BIT(11) +#define LPM_HRWE BIT(10) +#define LPM_MODE(x) (((x) & 0x3) << 8) +#define ISO_UPDATE BIT(7) +#define SOFT_CONN BIT(6) +#define HS_ENABLE BIT(5) +#define RESUME BIT(2) +#define SUSPENDM_ENABLE BIT(0) + +/* U3D_DEVICE_CONTROL */ +#define DC_HOSTREQ BIT(1) +#define DC_SESSION BIT(0) + +/* U3D_USB2_TEST_MODE */ +#define U2U3_AUTO_SWITCH BIT(10) +#define LPM_FORCE_STALL BIT(8) +#define FIFO_ACCESS BIT(6) +#define FORCE_FS BIT(5) +#define FORCE_HS BIT(4) +#define TEST_PACKET_MODE BIT(3) +#define TEST_K_MODE BIT(2) +#define TEST_J_MODE BIT(1) +#define TEST_SE0_NAK_MODE BIT(0) + +/* U3D_COMMON_USB_INTR_ENABLE */ +/* U3D_COMMON_USB_INTR */ +#define LPM_RESUME_INTR BIT(9) +#define LPM_INTR BIT(8) +#define DISCONN_INTR BIT(5) +#define CONN_INTR BIT(4) +#define SOF_INTR BIT(3) +#define RESET_INTR BIT(2) +#define RESUME_INTR BIT(1) +#define SUSPEND_INTR BIT(0) + +/* U3D_LINK_RESET_INFO */ +#define WTCHRP_MSK GENMASK(19, 16) + +/* U3D_USB20_LPM_PARAMETER */ +#define LPM_BESLCK_U3(x) (((x) & 0xf) << 12) +#define LPM_BESLCK(x) (((x) & 0xf) << 8) +#define LPM_BESLDCK(x) (((x) & 0xf) << 4) +#define LPM_BESL GENMASK(3, 0) + +/* U3D_USB20_MISC_CONTROL */ +#define LPM_U3_ACK_EN BIT(0) + +/*---------------- SSUSB_SIFSLV_IPPC REGISTER DEFINITION ----------------*/ + +#define U3D_SSUSB_IP_PW_CTRL0 (SSUSB_SIFSLV_IPPC_BASE + 0x0000) +#define U3D_SSUSB_IP_PW_CTRL1 (SSUSB_SIFSLV_IPPC_BASE + 0x0004) +#define U3D_SSUSB_IP_PW_CTRL2 (SSUSB_SIFSLV_IPPC_BASE + 0x0008) +#define U3D_SSUSB_IP_PW_CTRL3 (SSUSB_SIFSLV_IPPC_BASE + 0x000C) +#define U3D_SSUSB_IP_PW_STS1 (SSUSB_SIFSLV_IPPC_BASE + 0x0010) +#define U3D_SSUSB_IP_PW_STS2 (SSUSB_SIFSLV_IPPC_BASE + 0x0014) +#define U3D_SSUSB_OTG_STS (SSUSB_SIFSLV_IPPC_BASE + 0x0018) +#define U3D_SSUSB_OTG_STS_CLR (SSUSB_SIFSLV_IPPC_BASE + 0x001C) +#define U3D_SSUSB_IP_XHCI_CAP (SSUSB_SIFSLV_IPPC_BASE + 0x0024) +#define U3D_SSUSB_IP_DEV_CAP (SSUSB_SIFSLV_IPPC_BASE + 0x0028) +#define U3D_SSUSB_OTG_INT_EN (SSUSB_SIFSLV_IPPC_BASE + 0x002C) +#define U3D_SSUSB_U3_CTRL_0P (SSUSB_SIFSLV_IPPC_BASE + 0x0030) +#define U3D_SSUSB_U2_CTRL_0P (SSUSB_SIFSLV_IPPC_BASE + 0x0050) +#define U3D_SSUSB_REF_CK_CTRL (SSUSB_SIFSLV_IPPC_BASE + 0x008C) +#define U3D_SSUSB_DEV_RST_CTRL (SSUSB_SIFSLV_IPPC_BASE + 0x0098) +#define U3D_SSUSB_HW_ID (SSUSB_SIFSLV_IPPC_BASE + 0x00A0) +#define U3D_SSUSB_HW_SUB_ID (SSUSB_SIFSLV_IPPC_BASE + 0x00A4) +#define U3D_SSUSB_IP_SPARE0 (SSUSB_SIFSLV_IPPC_BASE + 0x00C8) + +/*---------------- SSUSB_SIFSLV_IPPC FIELD DEFINITION ----------------*/ + +/* U3D_SSUSB_IP_PW_CTRL0 */ +#define SSUSB_IP_SW_RST BIT(0) + +/* U3D_SSUSB_IP_PW_CTRL1 */ +#define SSUSB_IP_HOST_PDN BIT(0) + +/* U3D_SSUSB_IP_PW_CTRL2 */ +#define SSUSB_IP_DEV_PDN BIT(0) + +/* U3D_SSUSB_IP_PW_CTRL3 */ +#define SSUSB_IP_PCIE_PDN BIT(0) + +/* U3D_SSUSB_IP_PW_STS1 */ +#define SSUSB_IP_SLEEP_STS BIT(30) +#define SSUSB_U3_MAC_RST_B_STS BIT(16) +#define SSUSB_XHCI_RST_B_STS BIT(11) +#define SSUSB_SYS125_RST_B_STS BIT(10) +#define SSUSB_REF_RST_B_STS BIT(8) +#define SSUSB_SYSPLL_STABLE BIT(0) + +/* U3D_SSUSB_IP_PW_STS2 */ +#define SSUSB_U2_MAC_SYS_RST_B_STS BIT(0) + +/* U3D_SSUSB_OTG_STS */ +#define SSUSB_VBUS_VALID BIT(9) + +/* U3D_SSUSB_OTG_STS_CLR */ +#define SSUSB_VBUS_INTR_CLR BIT(6) + +/* U3D_SSUSB_IP_XHCI_CAP */ +#define SSUSB_IP_XHCI_U2_PORT_NUM(x) (((x) >> 8) & 0xff) +#define SSUSB_IP_XHCI_U3_PORT_NUM(x) ((x) & 0xff) + +/* U3D_SSUSB_IP_DEV_CAP */ +#define SSUSB_IP_DEV_U3_PORT_NUM(x) ((x) & 0xff) + +/* U3D_SSUSB_OTG_INT_EN */ +#define SSUSB_VBUS_CHG_INT_A_EN BIT(7) +#define SSUSB_VBUS_CHG_INT_B_EN BIT(6) + +/* U3D_SSUSB_U3_CTRL_0P */ +#define SSUSB_U3_PORT_HOST_SEL BIT(2) +#define SSUSB_U3_PORT_PDN BIT(1) +#define SSUSB_U3_PORT_DIS BIT(0) + +/* U3D_SSUSB_U2_CTRL_0P */ +#define SSUSB_U2_PORT_OTG_SEL BIT(7) +#define SSUSB_U2_PORT_HOST_SEL BIT(2) +#define SSUSB_U2_PORT_PDN BIT(1) +#define SSUSB_U2_PORT_DIS BIT(0) + +/* U3D_SSUSB_DEV_RST_CTRL */ +#define SSUSB_DEV_SW_RST BIT(0) + +#endif /* _SSUSB_HW_REGS_H_ */ diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c new file mode 100644 index 000000000000..783367805c99 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -0,0 +1,484 @@ +/* + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/iopoll.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/pinctrl/consumer.h> +#include <linux/platform_device.h> + +#include "mtu3.h" +#include "mtu3_dr.h" + +/* u2-port0 should be powered on and enabled; */ +int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks) +{ + void __iomem *ibase = ssusb->ippc_base; + u32 value, check_val; + int ret; + + check_val = ex_clks | SSUSB_SYS125_RST_B_STS | SSUSB_SYSPLL_STABLE | + SSUSB_REF_RST_B_STS; + + ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value, + (check_val == (value & check_val)), 100, 20000); + if (ret) { + dev_err(ssusb->dev, "clks of sts1 are not stable!\n"); + return ret; + } + + ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS2, value, + (value & SSUSB_U2_MAC_SYS_RST_B_STS), 100, 10000); + if (ret) { + dev_err(ssusb->dev, "mac2 clock is not stable\n"); + return ret; + } + + return 0; +} + +static int ssusb_phy_init(struct ssusb_mtk *ssusb) +{ + int i; + int ret; + + for (i = 0; i < ssusb->num_phys; i++) { + ret = phy_init(ssusb->phys[i]); + if (ret) + goto exit_phy; + } + return 0; + +exit_phy: + for (; i > 0; i--) + phy_exit(ssusb->phys[i - 1]); + + return ret; +} + +static int ssusb_phy_exit(struct ssusb_mtk *ssusb) +{ + int i; + + for (i = 0; i < ssusb->num_phys; i++) + phy_exit(ssusb->phys[i]); + + return 0; +} + +static int ssusb_phy_power_on(struct ssusb_mtk *ssusb) +{ + int i; + int ret; + + for (i = 0; i < ssusb->num_phys; i++) { + ret = phy_power_on(ssusb->phys[i]); + if (ret) + goto power_off_phy; + } + return 0; + +power_off_phy: + for (; i > 0; i--) + phy_power_off(ssusb->phys[i - 1]); + + return ret; +} + +static void ssusb_phy_power_off(struct ssusb_mtk *ssusb) +{ + unsigned int i; + + for (i = 0; i < ssusb->num_phys; i++) + phy_power_off(ssusb->phys[i]); +} + +static int ssusb_rscs_init(struct ssusb_mtk *ssusb) +{ + int ret = 0; + + ret = regulator_enable(ssusb->vusb33); + if (ret) { + dev_err(ssusb->dev, "failed to enable vusb33\n"); + goto vusb33_err; + } + + ret = clk_prepare_enable(ssusb->sys_clk); + if (ret) { + dev_err(ssusb->dev, "failed to enable sys_clk\n"); + goto clk_err; + } + + ret = ssusb_phy_init(ssusb); + if (ret) { + dev_err(ssusb->dev, "failed to init phy\n"); + goto phy_init_err; + } + + ret = ssusb_phy_power_on(ssusb); + if (ret) { + dev_err(ssusb->dev, "failed to power on phy\n"); + goto phy_err; + } + + return 0; + +phy_err: + ssusb_phy_exit(ssusb); +phy_init_err: + clk_disable_unprepare(ssusb->sys_clk); +clk_err: + regulator_disable(ssusb->vusb33); +vusb33_err: + + return ret; +} + +static void ssusb_rscs_exit(struct ssusb_mtk *ssusb) +{ + clk_disable_unprepare(ssusb->sys_clk); + regulator_disable(ssusb->vusb33); + ssusb_phy_power_off(ssusb); + ssusb_phy_exit(ssusb); +} + +static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb) +{ + /* reset whole ip (xhci & u3d) */ + mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); + udelay(1); + mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); +} + +static int get_iddig_pinctrl(struct ssusb_mtk *ssusb) +{ + struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + + otg_sx->id_pinctrl = devm_pinctrl_get(ssusb->dev); + if (IS_ERR(otg_sx->id_pinctrl)) { + dev_err(ssusb->dev, "Cannot find id pinctrl!\n"); + return PTR_ERR(otg_sx->id_pinctrl); + } + + otg_sx->id_float = + pinctrl_lookup_state(otg_sx->id_pinctrl, "id_float"); + if (IS_ERR(otg_sx->id_float)) { + dev_err(ssusb->dev, "Cannot find pinctrl id_float!\n"); + return PTR_ERR(otg_sx->id_float); + } + + otg_sx->id_ground = + pinctrl_lookup_state(otg_sx->id_pinctrl, "id_ground"); + if (IS_ERR(otg_sx->id_ground)) { + dev_err(ssusb->dev, "Cannot find pinctrl id_ground!\n"); + return PTR_ERR(otg_sx->id_ground); + } + + return 0; +} + +static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb) +{ + struct device_node *node = pdev->dev.of_node; + struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + struct device *dev = &pdev->dev; + struct regulator *vbus; + struct resource *res; + int i; + int ret; + + ssusb->num_phys = of_count_phandle_with_args(node, + "phys", "#phy-cells"); + if (ssusb->num_phys > 0) { + ssusb->phys = devm_kcalloc(dev, ssusb->num_phys, + sizeof(*ssusb->phys), GFP_KERNEL); + if (!ssusb->phys) + return -ENOMEM; + } else { + ssusb->num_phys = 0; + } + + for (i = 0; i < ssusb->num_phys; i++) { + ssusb->phys[i] = devm_of_phy_get_by_index(dev, node, i); + if (IS_ERR(ssusb->phys[i])) { + dev_err(dev, "failed to get phy-%d\n", i); + return PTR_ERR(ssusb->phys[i]); + } + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ippc"); + ssusb->ippc_base = devm_ioremap_resource(dev, res); + if (IS_ERR(ssusb->ippc_base)) { + dev_err(dev, "failed to map memory for ippc\n"); + return PTR_ERR(ssusb->ippc_base); + } + + ssusb->vusb33 = devm_regulator_get(&pdev->dev, "vusb33"); + if (IS_ERR(ssusb->vusb33)) { + dev_err(dev, "failed to get vusb33\n"); + return PTR_ERR(ssusb->vusb33); + } + + ssusb->sys_clk = devm_clk_get(dev, "sys_ck"); + if (IS_ERR(ssusb->sys_clk)) { + dev_err(dev, "failed to get sys clock\n"); + return PTR_ERR(ssusb->sys_clk); + } + + ssusb->dr_mode = usb_get_dr_mode(dev); + if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN) { + dev_err(dev, "dr_mode is error\n"); + return -EINVAL; + } + + if (ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) + return 0; + + /* if host role is supported */ + ret = ssusb_wakeup_of_property_parse(ssusb, node); + if (ret) + return ret; + + if (ssusb->dr_mode != USB_DR_MODE_OTG) + return 0; + + /* if dual-role mode is supported */ + vbus = devm_regulator_get(&pdev->dev, "vbus"); + if (IS_ERR(vbus)) { + dev_err(dev, "failed to get vbus\n"); + return PTR_ERR(vbus); + } + otg_sx->vbus = vbus; + + otg_sx->is_u3_drd = of_property_read_bool(node, "mediatek,usb3-drd"); + otg_sx->manual_drd_enabled = + of_property_read_bool(node, "enable-manual-drd"); + + if (of_property_read_bool(node, "extcon")) { + otg_sx->edev = extcon_get_edev_by_phandle(ssusb->dev, 0); + if (IS_ERR(otg_sx->edev)) { + dev_err(ssusb->dev, "couldn't get extcon device\n"); + return -EPROBE_DEFER; + } + if (otg_sx->manual_drd_enabled) { + ret = get_iddig_pinctrl(ssusb); + if (ret) + return ret; + } + } + + dev_info(dev, "dr_mode: %d, is_u3_dr: %d\n", + ssusb->dr_mode, otg_sx->is_u3_drd); + + return 0; +} + +static int mtu3_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct ssusb_mtk *ssusb; + int ret = -ENOMEM; + + /* all elements are set to ZERO as default value */ + ssusb = devm_kzalloc(dev, sizeof(*ssusb), GFP_KERNEL); + if (!ssusb) + return -ENOMEM; + + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(dev, "No suitable DMA config available\n"); + return -ENOTSUPP; + } + + platform_set_drvdata(pdev, ssusb); + ssusb->dev = dev; + + ret = get_ssusb_rscs(pdev, ssusb); + if (ret) + return ret; + + /* enable power domain */ + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + device_enable_async_suspend(dev); + + ret = ssusb_rscs_init(ssusb); + if (ret) + goto comm_init_err; + + ssusb_ip_sw_reset(ssusb); + + if (IS_ENABLED(CONFIG_USB_MTU3_HOST)) + ssusb->dr_mode = USB_DR_MODE_HOST; + else if (IS_ENABLED(CONFIG_USB_MTU3_GADGET)) + ssusb->dr_mode = USB_DR_MODE_PERIPHERAL; + + /* default as host */ + ssusb->is_host = !(ssusb->dr_mode == USB_DR_MODE_PERIPHERAL); + + switch (ssusb->dr_mode) { + case USB_DR_MODE_PERIPHERAL: + ret = ssusb_gadget_init(ssusb); + if (ret) { + dev_err(dev, "failed to initialize gadget\n"); + goto comm_exit; + } + break; + case USB_DR_MODE_HOST: + ret = ssusb_host_init(ssusb, node); + if (ret) { + dev_err(dev, "failed to initialize host\n"); + goto comm_exit; + } + break; + case USB_DR_MODE_OTG: + ret = ssusb_gadget_init(ssusb); + if (ret) { + dev_err(dev, "failed to initialize gadget\n"); + goto comm_exit; + } + + ret = ssusb_host_init(ssusb, node); + if (ret) { + dev_err(dev, "failed to initialize host\n"); + goto gadget_exit; + } + + ssusb_otg_switch_init(ssusb); + break; + default: + dev_err(dev, "unsupported mode: %d\n", ssusb->dr_mode); + ret = -EINVAL; + goto comm_exit; + } + + return 0; + +gadget_exit: + ssusb_gadget_exit(ssusb); +comm_exit: + ssusb_rscs_exit(ssusb); +comm_init_err: + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + return ret; +} + +static int mtu3_remove(struct platform_device *pdev) +{ + struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + + switch (ssusb->dr_mode) { + case USB_DR_MODE_PERIPHERAL: + ssusb_gadget_exit(ssusb); + break; + case USB_DR_MODE_HOST: + ssusb_host_exit(ssusb); + break; + case USB_DR_MODE_OTG: + ssusb_otg_switch_exit(ssusb); + ssusb_gadget_exit(ssusb); + ssusb_host_exit(ssusb); + break; + default: + return -EINVAL; + } + + ssusb_rscs_exit(ssusb); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +/* + * when support dual-role mode, we reject suspend when + * it works as device mode; + */ +static int __maybe_unused mtu3_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + + dev_dbg(dev, "%s\n", __func__); + + /* REVISIT: disconnect it for only device mode? */ + if (!ssusb->is_host) + return 0; + + ssusb_host_disable(ssusb, true); + ssusb_phy_power_off(ssusb); + clk_disable_unprepare(ssusb->sys_clk); + ssusb_wakeup_enable(ssusb); + + return 0; +} + +static int __maybe_unused mtu3_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + + dev_dbg(dev, "%s\n", __func__); + + if (!ssusb->is_host) + return 0; + + ssusb_wakeup_disable(ssusb); + clk_prepare_enable(ssusb->sys_clk); + ssusb_phy_power_on(ssusb); + ssusb_host_enable(ssusb); + + return 0; +} + +static const struct dev_pm_ops mtu3_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mtu3_suspend, mtu3_resume) +}; + +#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &mtu3_pm_ops : NULL) + +#ifdef CONFIG_OF + +static const struct of_device_id mtu3_of_match[] = { + {.compatible = "mediatek,mt8173-mtu3",}, + {}, +}; + +MODULE_DEVICE_TABLE(of, mtu3_of_match); + +#endif + +static struct platform_driver mtu3_driver = { + .probe = mtu3_probe, + .remove = mtu3_remove, + .driver = { + .name = MTU3_DRIVER_NAME, + .pm = DEV_PM_OPS, + .of_match_table = of_match_ptr(mtu3_of_match), + }, +}; +module_platform_driver(mtu3_driver); + +MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MediaTek USB3 DRD Controller Driver"); diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c new file mode 100644 index 000000000000..7d9ba8a52368 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_qmu.c @@ -0,0 +1,573 @@ +/* + * mtu3_qmu.c - Queue Management Unit driver for device controller + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +/* + * Queue Management Unit (QMU) is designed to unload SW effort + * to serve DMA interrupts. + * By preparing General Purpose Descriptor (GPD) and Buffer Descriptor (BD), + * SW links data buffers and triggers QMU to send / receive data to + * host / from device at a time. + * And now only GPD is supported. + * + * For more detailed information, please refer to QMU Programming Guide + */ + +#include <linux/dmapool.h> +#include <linux/iopoll.h> + +#include "mtu3.h" + +#define QMU_CHECKSUM_LEN 16 + +#define GPD_FLAGS_HWO BIT(0) +#define GPD_FLAGS_BDP BIT(1) +#define GPD_FLAGS_BPS BIT(2) +#define GPD_FLAGS_IOC BIT(7) + +#define GPD_EXT_FLAG_ZLP BIT(5) + + +static struct qmu_gpd *gpd_dma_to_virt(struct mtu3_gpd_ring *ring, + dma_addr_t dma_addr) +{ + dma_addr_t dma_base = ring->dma; + struct qmu_gpd *gpd_head = ring->start; + u32 offset = (dma_addr - dma_base) / sizeof(*gpd_head); + + if (offset >= MAX_GPD_NUM) + return NULL; + + return gpd_head + offset; +} + +static dma_addr_t gpd_virt_to_dma(struct mtu3_gpd_ring *ring, + struct qmu_gpd *gpd) +{ + dma_addr_t dma_base = ring->dma; + struct qmu_gpd *gpd_head = ring->start; + u32 offset; + + offset = gpd - gpd_head; + if (offset >= MAX_GPD_NUM) + return 0; + + return dma_base + (offset * sizeof(*gpd)); +} + +static void gpd_ring_init(struct mtu3_gpd_ring *ring, struct qmu_gpd *gpd) +{ + ring->start = gpd; + ring->enqueue = gpd; + ring->dequeue = gpd; + ring->end = gpd + MAX_GPD_NUM - 1; +} + +static void reset_gpd_list(struct mtu3_ep *mep) +{ + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + struct qmu_gpd *gpd = ring->start; + + if (gpd) { + gpd->flag &= ~GPD_FLAGS_HWO; + gpd_ring_init(ring, gpd); + } +} + +int mtu3_gpd_ring_alloc(struct mtu3_ep *mep) +{ + struct qmu_gpd *gpd; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + + /* software own all gpds as default */ + gpd = dma_pool_zalloc(mep->mtu->qmu_gpd_pool, GFP_ATOMIC, &ring->dma); + if (gpd == NULL) + return -ENOMEM; + + gpd_ring_init(ring, gpd); + + return 0; +} + +void mtu3_gpd_ring_free(struct mtu3_ep *mep) +{ + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + + dma_pool_free(mep->mtu->qmu_gpd_pool, + ring->start, ring->dma); + memset(ring, 0, sizeof(*ring)); +} + +/* + * calculate check sum of a gpd or bd + * add "noinline" and "mb" to prevent wrong calculation + */ +static noinline u8 qmu_calc_checksum(u8 *data) +{ + u8 chksum = 0; + int i; + + data[1] = 0x0; /* set checksum to 0 */ + + mb(); /* ensure the gpd/bd is really up-to-date */ + for (i = 0; i < QMU_CHECKSUM_LEN; i++) + chksum += data[i]; + + /* Default: HWO=1, @flag[bit0] */ + chksum += 1; + + return 0xFF - chksum; +} + +void mtu3_qmu_resume(struct mtu3_ep *mep) +{ + struct mtu3 *mtu = mep->mtu; + void __iomem *mbase = mtu->mac_base; + int epnum = mep->epnum; + u32 offset; + + offset = mep->is_in ? USB_QMU_TQCSR(epnum) : USB_QMU_RQCSR(epnum); + + mtu3_writel(mbase, offset, QMU_Q_RESUME); + if (!(mtu3_readl(mbase, offset) & QMU_Q_ACTIVE)) + mtu3_writel(mbase, offset, QMU_Q_RESUME); +} + +static struct qmu_gpd *advance_enq_gpd(struct mtu3_gpd_ring *ring) +{ + if (ring->enqueue < ring->end) + ring->enqueue++; + else + ring->enqueue = ring->start; + + return ring->enqueue; +} + +static struct qmu_gpd *advance_deq_gpd(struct mtu3_gpd_ring *ring) +{ + if (ring->dequeue < ring->end) + ring->dequeue++; + else + ring->dequeue = ring->start; + + return ring->dequeue; +} + +/* check if a ring is emtpy */ +static int gpd_ring_empty(struct mtu3_gpd_ring *ring) +{ + struct qmu_gpd *enq = ring->enqueue; + struct qmu_gpd *next; + + if (ring->enqueue < ring->end) + next = enq + 1; + else + next = ring->start; + + /* one gpd is reserved to simplify gpd preparation */ + return next == ring->dequeue; +} + +int mtu3_prepare_transfer(struct mtu3_ep *mep) +{ + return gpd_ring_empty(&mep->gpd_ring); +} + +static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) +{ + struct qmu_gpd *enq; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + struct qmu_gpd *gpd = ring->enqueue; + struct usb_request *req = &mreq->request; + + /* set all fields to zero as default value */ + memset(gpd, 0, sizeof(*gpd)); + + gpd->buffer = cpu_to_le32((u32)req->dma); + gpd->buf_len = cpu_to_le16(req->length); + gpd->flag |= GPD_FLAGS_IOC; + + /* get the next GPD */ + enq = advance_enq_gpd(ring); + dev_dbg(mep->mtu->dev, "TX-EP%d queue gpd=%p, enq=%p\n", + mep->epnum, gpd, enq); + + enq->flag &= ~GPD_FLAGS_HWO; + gpd->next_gpd = cpu_to_le32((u32)gpd_virt_to_dma(ring, enq)); + + if (req->zero) + gpd->ext_flag |= GPD_EXT_FLAG_ZLP; + + gpd->chksum = qmu_calc_checksum((u8 *)gpd); + gpd->flag |= GPD_FLAGS_HWO; + + mreq->gpd = gpd; + + return 0; +} + +static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) +{ + struct qmu_gpd *enq; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + struct qmu_gpd *gpd = ring->enqueue; + struct usb_request *req = &mreq->request; + + /* set all fields to zero as default value */ + memset(gpd, 0, sizeof(*gpd)); + + gpd->buffer = cpu_to_le32((u32)req->dma); + gpd->data_buf_len = cpu_to_le16(req->length); + gpd->flag |= GPD_FLAGS_IOC; + + /* get the next GPD */ + enq = advance_enq_gpd(ring); + dev_dbg(mep->mtu->dev, "RX-EP%d queue gpd=%p, enq=%p\n", + mep->epnum, gpd, enq); + + enq->flag &= ~GPD_FLAGS_HWO; + gpd->next_gpd = cpu_to_le32((u32)gpd_virt_to_dma(ring, enq)); + gpd->chksum = qmu_calc_checksum((u8 *)gpd); + gpd->flag |= GPD_FLAGS_HWO; + + mreq->gpd = gpd; + + return 0; +} + +void mtu3_insert_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) +{ + + if (mep->is_in) + mtu3_prepare_tx_gpd(mep, mreq); + else + mtu3_prepare_rx_gpd(mep, mreq); +} + +int mtu3_qmu_start(struct mtu3_ep *mep) +{ + struct mtu3 *mtu = mep->mtu; + void __iomem *mbase = mtu->mac_base; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + u8 epnum = mep->epnum; + + if (mep->is_in) { + /* set QMU start address */ + mtu3_writel(mbase, USB_QMU_TQSAR(mep->epnum), ring->dma); + mtu3_setbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN); + mtu3_setbits(mbase, U3D_QCR0, QMU_TX_CS_EN(epnum)); + /* send zero length packet according to ZLP flag in GPD */ + mtu3_setbits(mbase, U3D_QCR1, QMU_TX_ZLP(epnum)); + mtu3_writel(mbase, U3D_TQERRIESR0, + QMU_TX_LEN_ERR(epnum) | QMU_TX_CS_ERR(epnum)); + + if (mtu3_readl(mbase, USB_QMU_TQCSR(epnum)) & QMU_Q_ACTIVE) { + dev_warn(mtu->dev, "Tx %d Active Now!\n", epnum); + return 0; + } + mtu3_writel(mbase, USB_QMU_TQCSR(epnum), QMU_Q_START); + + } else { + mtu3_writel(mbase, USB_QMU_RQSAR(mep->epnum), ring->dma); + mtu3_setbits(mbase, MU3D_EP_RXCR0(mep->epnum), RX_DMAREQEN); + mtu3_setbits(mbase, U3D_QCR0, QMU_RX_CS_EN(epnum)); + /* don't expect ZLP */ + mtu3_clrbits(mbase, U3D_QCR3, QMU_RX_ZLP(epnum)); + /* move to next GPD when receive ZLP */ + mtu3_setbits(mbase, U3D_QCR3, QMU_RX_COZ(epnum)); + mtu3_writel(mbase, U3D_RQERRIESR0, + QMU_RX_LEN_ERR(epnum) | QMU_RX_CS_ERR(epnum)); + mtu3_writel(mbase, U3D_RQERRIESR1, QMU_RX_ZLP_ERR(epnum)); + + if (mtu3_readl(mbase, USB_QMU_RQCSR(epnum)) & QMU_Q_ACTIVE) { + dev_warn(mtu->dev, "Rx %d Active Now!\n", epnum); + return 0; + } + mtu3_writel(mbase, USB_QMU_RQCSR(epnum), QMU_Q_START); + } + + return 0; +} + +/* may called in atomic context */ +void mtu3_qmu_stop(struct mtu3_ep *mep) +{ + struct mtu3 *mtu = mep->mtu; + void __iomem *mbase = mtu->mac_base; + int epnum = mep->epnum; + u32 value = 0; + u32 qcsr; + int ret; + + qcsr = mep->is_in ? USB_QMU_TQCSR(epnum) : USB_QMU_RQCSR(epnum); + + if (!(mtu3_readl(mbase, qcsr) & QMU_Q_ACTIVE)) { + dev_dbg(mtu->dev, "%s's qmu is inactive now!\n", mep->name); + return; + } + mtu3_writel(mbase, qcsr, QMU_Q_STOP); + + ret = readl_poll_timeout_atomic(mbase + qcsr, value, + !(value & QMU_Q_ACTIVE), 1, 1000); + if (ret) { + dev_err(mtu->dev, "stop %s's qmu failed\n", mep->name); + return; + } + + dev_dbg(mtu->dev, "%s's qmu stop now!\n", mep->name); +} + +void mtu3_qmu_flush(struct mtu3_ep *mep) +{ + + dev_dbg(mep->mtu->dev, "%s flush QMU %s\n", __func__, + ((mep->is_in) ? "TX" : "RX")); + + /*Stop QMU */ + mtu3_qmu_stop(mep); + reset_gpd_list(mep); +} + +/* + * QMU can't transfer zero length packet directly (a hardware limit + * on old SoCs), so when needs to send ZLP, we intentionally trigger + * a length error interrupt, and in the ISR sends a ZLP by BMU. + */ +static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum) +{ + struct mtu3_ep *mep = mtu->in_eps + epnum; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + void __iomem *mbase = mtu->mac_base; + struct qmu_gpd *gpd_current = NULL; + dma_addr_t gpd_dma = mtu3_readl(mbase, USB_QMU_TQCPR(epnum)); + struct usb_request *req = NULL; + struct mtu3_request *mreq; + u32 txcsr = 0; + int ret; + + mreq = next_request(mep); + if (mreq && mreq->request.length == 0) + req = &mreq->request; + else + return; + + gpd_current = gpd_dma_to_virt(ring, gpd_dma); + + if (le16_to_cpu(gpd_current->buf_len) != 0) { + dev_err(mtu->dev, "TX EP%d buffer length error(!=0)\n", epnum); + return; + } + + dev_dbg(mtu->dev, "%s send ZLP for req=%p\n", __func__, mreq); + + mtu3_clrbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN); + + ret = readl_poll_timeout_atomic(mbase + MU3D_EP_TXCR0(mep->epnum), + txcsr, !(txcsr & TX_FIFOFULL), 1, 1000); + if (ret) { + dev_err(mtu->dev, "%s wait for fifo empty fail\n", __func__); + return; + } + mtu3_setbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_TXPKTRDY); + + /* by pass the current GDP */ + gpd_current->flag |= GPD_FLAGS_BPS; + gpd_current->chksum = qmu_calc_checksum((u8 *)gpd_current); + gpd_current->flag |= GPD_FLAGS_HWO; + + /*enable DMAREQEN, switch back to QMU mode */ + mtu3_setbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN); + mtu3_qmu_resume(mep); +} + +/* + * NOTE: request list maybe is already empty as following case: + * queue_tx --> qmu_interrupt(clear interrupt pending, schedule tasklet)--> + * queue_tx --> process_tasklet(meanwhile, the second one is transferred, + * tasklet process both of them)-->qmu_interrupt for second one. + * To avoid upper case, put qmu_done_tx in ISR directly to process it. + */ +static void qmu_done_tx(struct mtu3 *mtu, u8 epnum) +{ + struct mtu3_ep *mep = mtu->in_eps + epnum; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + void __iomem *mbase = mtu->mac_base; + struct qmu_gpd *gpd = ring->dequeue; + struct qmu_gpd *gpd_current = NULL; + dma_addr_t gpd_dma = mtu3_readl(mbase, USB_QMU_TQCPR(epnum)); + struct usb_request *request = NULL; + struct mtu3_request *mreq; + + /*transfer phy address got from QMU register to virtual address */ + gpd_current = gpd_dma_to_virt(ring, gpd_dma); + + dev_dbg(mtu->dev, "%s EP%d, last=%p, current=%p, enq=%p\n", + __func__, epnum, gpd, gpd_current, ring->enqueue); + + while (gpd != gpd_current && !(gpd->flag & GPD_FLAGS_HWO)) { + + mreq = next_request(mep); + + if (mreq == NULL || mreq->gpd != gpd) { + dev_err(mtu->dev, "no correct TX req is found\n"); + break; + } + + request = &mreq->request; + request->actual = le16_to_cpu(gpd->buf_len); + mtu3_req_complete(mep, request, 0); + + gpd = advance_deq_gpd(ring); + } + + dev_dbg(mtu->dev, "%s EP%d, deq=%p, enq=%p, complete\n", + __func__, epnum, ring->dequeue, ring->enqueue); + +} + +static void qmu_done_rx(struct mtu3 *mtu, u8 epnum) +{ + struct mtu3_ep *mep = mtu->out_eps + epnum; + struct mtu3_gpd_ring *ring = &mep->gpd_ring; + void __iomem *mbase = mtu->mac_base; + struct qmu_gpd *gpd = ring->dequeue; + struct qmu_gpd *gpd_current = NULL; + dma_addr_t gpd_dma = mtu3_readl(mbase, USB_QMU_RQCPR(epnum)); + struct usb_request *req = NULL; + struct mtu3_request *mreq; + + gpd_current = gpd_dma_to_virt(ring, gpd_dma); + + dev_dbg(mtu->dev, "%s EP%d, last=%p, current=%p, enq=%p\n", + __func__, epnum, gpd, gpd_current, ring->enqueue); + + while (gpd != gpd_current && !(gpd->flag & GPD_FLAGS_HWO)) { + + mreq = next_request(mep); + + if (mreq == NULL || mreq->gpd != gpd) { + dev_err(mtu->dev, "no correct RX req is found\n"); + break; + } + req = &mreq->request; + + req->actual = le16_to_cpu(gpd->buf_len); + mtu3_req_complete(mep, req, 0); + + gpd = advance_deq_gpd(ring); + } + + dev_dbg(mtu->dev, "%s EP%d, deq=%p, enq=%p, complete\n", + __func__, epnum, ring->dequeue, ring->enqueue); +} + +static void qmu_done_isr(struct mtu3 *mtu, u32 done_status) +{ + int i; + + for (i = 1; i < mtu->num_eps; i++) { + if (done_status & QMU_RX_DONE_INT(i)) + qmu_done_rx(mtu, i); + if (done_status & QMU_TX_DONE_INT(i)) + qmu_done_tx(mtu, i); + } +} + +static void qmu_exception_isr(struct mtu3 *mtu, u32 qmu_status) +{ + void __iomem *mbase = mtu->mac_base; + u32 errval; + int i; + + if ((qmu_status & RXQ_CSERR_INT) || (qmu_status & RXQ_LENERR_INT)) { + errval = mtu3_readl(mbase, U3D_RQERRIR0); + for (i = 1; i < mtu->num_eps; i++) { + if (errval & QMU_RX_CS_ERR(i)) + dev_err(mtu->dev, "Rx %d CS error!\n", i); + + if (errval & QMU_RX_LEN_ERR(i)) + dev_err(mtu->dev, "RX %d Length error\n", i); + } + mtu3_writel(mbase, U3D_RQERRIR0, errval); + } + + if (qmu_status & RXQ_ZLPERR_INT) { + errval = mtu3_readl(mbase, U3D_RQERRIR1); + for (i = 1; i < mtu->num_eps; i++) { + if (errval & QMU_RX_ZLP_ERR(i)) + dev_dbg(mtu->dev, "RX EP%d Recv ZLP\n", i); + } + mtu3_writel(mbase, U3D_RQERRIR1, errval); + } + + if ((qmu_status & TXQ_CSERR_INT) || (qmu_status & TXQ_LENERR_INT)) { + errval = mtu3_readl(mbase, U3D_TQERRIR0); + for (i = 1; i < mtu->num_eps; i++) { + if (errval & QMU_TX_CS_ERR(i)) + dev_err(mtu->dev, "Tx %d checksum error!\n", i); + + if (errval & QMU_TX_LEN_ERR(i)) + qmu_tx_zlp_error_handler(mtu, i); + } + mtu3_writel(mbase, U3D_TQERRIR0, errval); + } +} + +irqreturn_t mtu3_qmu_isr(struct mtu3 *mtu) +{ + void __iomem *mbase = mtu->mac_base; + u32 qmu_status; + u32 qmu_done_status; + + /* U3D_QISAR1 is read update */ + qmu_status = mtu3_readl(mbase, U3D_QISAR1); + qmu_status &= mtu3_readl(mbase, U3D_QIER1); + + qmu_done_status = mtu3_readl(mbase, U3D_QISAR0); + qmu_done_status &= mtu3_readl(mbase, U3D_QIER0); + mtu3_writel(mbase, U3D_QISAR0, qmu_done_status); /* W1C */ + dev_dbg(mtu->dev, "=== QMUdone[tx=%x, rx=%x] QMUexp[%x] ===\n", + (qmu_done_status & 0xFFFF), qmu_done_status >> 16, + qmu_status); + + if (qmu_done_status) + qmu_done_isr(mtu, qmu_done_status); + + if (qmu_status) + qmu_exception_isr(mtu, qmu_status); + + return IRQ_HANDLED; +} + +int mtu3_qmu_init(struct mtu3 *mtu) +{ + + compiletime_assert(QMU_GPD_SIZE == 16, "QMU_GPD size SHOULD be 16B"); + + mtu->qmu_gpd_pool = dma_pool_create("QMU_GPD", mtu->dev, + QMU_GPD_RING_SIZE, QMU_GPD_SIZE, 0); + + if (!mtu->qmu_gpd_pool) + return -ENOMEM; + + return 0; +} + +void mtu3_qmu_exit(struct mtu3 *mtu) +{ + dma_pool_destroy(mtu->qmu_gpd_pool); +} diff --git a/drivers/usb/mtu3/mtu3_qmu.h b/drivers/usb/mtu3/mtu3_qmu.h new file mode 100644 index 000000000000..4dafa16bf120 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_qmu.h @@ -0,0 +1,43 @@ +/* + * mtu3_qmu.h - Queue Management Unit driver header + * + * Copyright (C) 2016 MediaTek Inc. + * + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#ifndef __MTK_QMU_H__ +#define __MTK_QMU_H__ + +#define MAX_GPD_NUM 64 +#define QMU_GPD_SIZE (sizeof(struct qmu_gpd)) +#define QMU_GPD_RING_SIZE (MAX_GPD_NUM * QMU_GPD_SIZE) + +#define GPD_BUF_SIZE 65532 + +void mtu3_qmu_stop(struct mtu3_ep *mep); +int mtu3_qmu_start(struct mtu3_ep *mep); +void mtu3_qmu_resume(struct mtu3_ep *mep); +void mtu3_qmu_flush(struct mtu3_ep *mep); + +void mtu3_insert_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq); +int mtu3_prepare_transfer(struct mtu3_ep *mep); + +int mtu3_gpd_ring_alloc(struct mtu3_ep *mep); +void mtu3_gpd_ring_free(struct mtu3_ep *mep); + +irqreturn_t mtu3_qmu_isr(struct mtu3 *mtu); +int mtu3_qmu_init(struct mtu3 *mtu); +void mtu3_qmu_exit(struct mtu3 *mtu); + +#endif |