diff options
author | Greg Kroah-Hartman <gregkh@suse.de> | 2011-01-13 23:10:18 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-01-13 23:10:18 +0300 |
commit | ab4382d27412e7e3e7c936e8d50d8888dfac3df8 (patch) | |
tree | 51d96dea2431140358784b6b426715f37f74fd53 /drivers/serial/jsm | |
parent | 728674a7e466628df2aeec6d11a2ae1ef968fb67 (diff) | |
download | linux-ab4382d27412e7e3e7c936e8d50d8888dfac3df8.tar.xz |
tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.
This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: Michael H. Warfield <mhw@wittsend.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/jsm')
-rw-r--r-- | drivers/serial/jsm/Makefile | 8 | ||||
-rw-r--r-- | drivers/serial/jsm/jsm.h | 388 | ||||
-rw-r--r-- | drivers/serial/jsm/jsm_driver.c | 297 | ||||
-rw-r--r-- | drivers/serial/jsm/jsm_neo.c | 1412 | ||||
-rw-r--r-- | drivers/serial/jsm/jsm_tty.c | 910 |
5 files changed, 0 insertions, 3015 deletions
diff --git a/drivers/serial/jsm/Makefile b/drivers/serial/jsm/Makefile deleted file mode 100644 index e46b6e0f8b18..000000000000 --- a/drivers/serial/jsm/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# -# Makefile for Jasmine adapter -# - -obj-$(CONFIG_SERIAL_JSM) += jsm.o - -jsm-objs := jsm_driver.o jsm_neo.o jsm_tty.o - diff --git a/drivers/serial/jsm/jsm.h b/drivers/serial/jsm/jsm.h deleted file mode 100644 index 38a509c684cd..000000000000 --- a/drivers/serial/jsm/jsm.h +++ /dev/null @@ -1,388 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Wendy Xiong <wendyx@us.ibm.com> - * - ***********************************************************************/ - -#ifndef __JSM_DRIVER_H -#define __JSM_DRIVER_H - -#include <linux/kernel.h> -#include <linux/types.h> /* To pick up the varions Linux types */ -#include <linux/tty.h> -#include <linux/serial_core.h> -#include <linux/device.h> - -/* - * Debugging levels can be set using debug insmod variable - * They can also be compiled out completely. - */ -enum { - DBG_INIT = 0x01, - DBG_BASIC = 0x02, - DBG_CORE = 0x04, - DBG_OPEN = 0x08, - DBG_CLOSE = 0x10, - DBG_READ = 0x20, - DBG_WRITE = 0x40, - DBG_IOCTL = 0x80, - DBG_PROC = 0x100, - DBG_PARAM = 0x200, - DBG_PSCAN = 0x400, - DBG_EVENT = 0x800, - DBG_DRAIN = 0x1000, - DBG_MSIGS = 0x2000, - DBG_MGMT = 0x4000, - DBG_INTR = 0x8000, - DBG_CARR = 0x10000, -}; - -#define jsm_printk(nlevel, klevel, pdev, fmt, args...) \ - if ((DBG_##nlevel & jsm_debug)) \ - dev_printk(KERN_##klevel, pdev->dev, fmt, ## args) - -#define MAXLINES 256 -#define MAXPORTS 8 -#define MAX_STOPS_SENT 5 - -/* Board type definitions */ - -#define T_NEO 0000 -#define T_CLASSIC 0001 -#define T_PCIBUS 0400 - -/* Board State Definitions */ - -#define BD_RUNNING 0x0 -#define BD_REASON 0x7f -#define BD_NOTFOUND 0x1 -#define BD_NOIOPORT 0x2 -#define BD_NOMEM 0x3 -#define BD_NOBIOS 0x4 -#define BD_NOFEP 0x5 -#define BD_FAILED 0x6 -#define BD_ALLOCATED 0x7 -#define BD_TRIBOOT 0x8 -#define BD_BADKME 0x80 - - -/* 4 extra for alignment play space */ -#define WRITEBUFLEN ((4096) + 4) -#define MYFLIPLEN N_TTY_BUF_SIZE - -#define JSM_VERSION "jsm: 1.2-1-INKERNEL" -#define JSM_PARTNUM "40002438_A-INKERNEL" - -struct jsm_board; -struct jsm_channel; - -/************************************************************************ - * Per board operations structure * - ************************************************************************/ -struct board_ops { - irq_handler_t intr; - void (*uart_init) (struct jsm_channel *ch); - void (*uart_off) (struct jsm_channel *ch); - void (*param) (struct jsm_channel *ch); - void (*assert_modem_signals) (struct jsm_channel *ch); - void (*flush_uart_write) (struct jsm_channel *ch); - void (*flush_uart_read) (struct jsm_channel *ch); - void (*disable_receiver) (struct jsm_channel *ch); - void (*enable_receiver) (struct jsm_channel *ch); - void (*send_break) (struct jsm_channel *ch); - void (*clear_break) (struct jsm_channel *ch, int); - void (*send_start_character) (struct jsm_channel *ch); - void (*send_stop_character) (struct jsm_channel *ch); - void (*copy_data_from_queue_to_uart) (struct jsm_channel *ch); - u32 (*get_uart_bytes_left) (struct jsm_channel *ch); - void (*send_immediate_char) (struct jsm_channel *ch, unsigned char); -}; - - -/* - * Per-board information - */ -struct jsm_board -{ - int boardnum; /* Board number: 0-32 */ - - int type; /* Type of board */ - u8 rev; /* PCI revision ID */ - struct pci_dev *pci_dev; - u32 maxports; /* MAX ports this board can handle */ - - spinlock_t bd_intr_lock; /* Used to protect the poller tasklet and - * the interrupt routine from each other. - */ - - u32 nasync; /* Number of ports on card */ - - u32 irq; /* Interrupt request number */ - - u64 membase; /* Start of base memory of the card */ - u64 membase_end; /* End of base memory of the card */ - - u8 __iomem *re_map_membase;/* Remapped memory of the card */ - - u64 iobase; /* Start of io base of the card */ - u64 iobase_end; /* End of io base of the card */ - - u32 bd_uart_offset; /* Space between each UART */ - - struct jsm_channel *channels[MAXPORTS]; /* array of pointers to our channels. */ - char *flipbuf; /* Our flip buffer, alloced if board is found */ - - u32 bd_dividend; /* Board/UARTs specific dividend */ - - struct board_ops *bd_ops; - - struct list_head jsm_board_entry; -}; - -/************************************************************************ - * Device flag definitions for ch_flags. - ************************************************************************/ -#define CH_PRON 0x0001 /* Printer on string */ -#define CH_STOP 0x0002 /* Output is stopped */ -#define CH_STOPI 0x0004 /* Input is stopped */ -#define CH_CD 0x0008 /* Carrier is present */ -#define CH_FCAR 0x0010 /* Carrier forced on */ -#define CH_HANGUP 0x0020 /* Hangup received */ - -#define CH_RECEIVER_OFF 0x0040 /* Receiver is off */ -#define CH_OPENING 0x0080 /* Port in fragile open state */ -#define CH_CLOSING 0x0100 /* Port in fragile close state */ -#define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */ -#define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */ -#define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */ -#define CH_BREAK_SENDING 0x1000 /* Break is being sent */ -#define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */ -#define CH_FLIPBUF_IN_USE 0x4000 /* Channel's flipbuf is in use */ -#define CH_BAUD0 0x08000 /* Used for checking B0 transitions */ - -/* Our Read/Error/Write queue sizes */ -#define RQUEUEMASK 0x1FFF /* 8 K - 1 */ -#define EQUEUEMASK 0x1FFF /* 8 K - 1 */ -#define WQUEUEMASK 0x0FFF /* 4 K - 1 */ -#define RQUEUESIZE (RQUEUEMASK + 1) -#define EQUEUESIZE RQUEUESIZE -#define WQUEUESIZE (WQUEUEMASK + 1) - - -/************************************************************************ - * Channel information structure. - ************************************************************************/ -struct jsm_channel { - struct uart_port uart_port; - struct jsm_board *ch_bd; /* Board structure pointer */ - - spinlock_t ch_lock; /* provide for serialization */ - wait_queue_head_t ch_flags_wait; - - u32 ch_portnum; /* Port number, 0 offset. */ - u32 ch_open_count; /* open count */ - u32 ch_flags; /* Channel flags */ - - u64 ch_close_delay; /* How long we should drop RTS/DTR for */ - - tcflag_t ch_c_iflag; /* channel iflags */ - tcflag_t ch_c_cflag; /* channel cflags */ - tcflag_t ch_c_oflag; /* channel oflags */ - tcflag_t ch_c_lflag; /* channel lflags */ - u8 ch_stopc; /* Stop character */ - u8 ch_startc; /* Start character */ - - u8 ch_mostat; /* FEP output modem status */ - u8 ch_mistat; /* FEP input modem status */ - - struct neo_uart_struct __iomem *ch_neo_uart; /* Pointer to the "mapped" UART struct */ - u8 ch_cached_lsr; /* Cached value of the LSR register */ - - u8 *ch_rqueue; /* Our read queue buffer - malloc'ed */ - u16 ch_r_head; /* Head location of the read queue */ - u16 ch_r_tail; /* Tail location of the read queue */ - - u8 *ch_equeue; /* Our error queue buffer - malloc'ed */ - u16 ch_e_head; /* Head location of the error queue */ - u16 ch_e_tail; /* Tail location of the error queue */ - - u8 *ch_wqueue; /* Our write queue buffer - malloc'ed */ - u16 ch_w_head; /* Head location of the write queue */ - u16 ch_w_tail; /* Tail location of the write queue */ - - u64 ch_rxcount; /* total of data received so far */ - u64 ch_txcount; /* total of data transmitted so far */ - - u8 ch_r_tlevel; /* Receive Trigger level */ - u8 ch_t_tlevel; /* Transmit Trigger level */ - - u8 ch_r_watermark; /* Receive Watermark */ - - - u32 ch_stops_sent; /* How many times I have sent a stop character - * to try to stop the other guy sending. - */ - u64 ch_err_parity; /* Count of parity errors on channel */ - u64 ch_err_frame; /* Count of framing errors on channel */ - u64 ch_err_break; /* Count of breaks on channel */ - u64 ch_err_overrun; /* Count of overruns on channel */ - - u64 ch_xon_sends; /* Count of xons transmitted */ - u64 ch_xoff_sends; /* Count of xoffs transmitted */ -}; - - -/************************************************************************ - * Per channel/port NEO UART structure * - ************************************************************************ - * Base Structure Entries Usage Meanings to Host * - * * - * W = read write R = read only * - * U = Unused. * - ************************************************************************/ - -struct neo_uart_struct { - u8 txrx; /* WR RHR/THR - Holding Reg */ - u8 ier; /* WR IER - Interrupt Enable Reg */ - u8 isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg */ - u8 lcr; /* WR LCR - Line Control Reg */ - u8 mcr; /* WR MCR - Modem Control Reg */ - u8 lsr; /* WR LSR - Line Status Reg */ - u8 msr; /* WR MSR - Modem Status Reg */ - u8 spr; /* WR SPR - Scratch Pad Reg */ - u8 fctr; /* WR FCTR - Feature Control Reg */ - u8 efr; /* WR EFR - Enhanced Function Reg */ - u8 tfifo; /* WR TXCNT/TXTRG - Transmit FIFO Reg */ - u8 rfifo; /* WR RXCNT/RXTRG - Recieve FIFO Reg */ - u8 xoffchar1; /* WR XOFF 1 - XOff Character 1 Reg */ - u8 xoffchar2; /* WR XOFF 2 - XOff Character 2 Reg */ - u8 xonchar1; /* WR XON 1 - Xon Character 1 Reg */ - u8 xonchar2; /* WR XON 2 - XOn Character 2 Reg */ - - u8 reserved1[0x2ff - 0x200]; /* U Reserved by Exar */ - u8 txrxburst[64]; /* RW 64 bytes of RX/TX FIFO Data */ - u8 reserved2[0x37f - 0x340]; /* U Reserved by Exar */ - u8 rxburst_with_errors[64]; /* R 64 bytes of RX FIFO Data + LSR */ -}; - -/* Where to read the extended interrupt register (32bits instead of 8bits) */ -#define UART_17158_POLL_ADDR_OFFSET 0x80 - -/* - * These are the redefinitions for the FCTR on the XR17C158, since - * Exar made them different than their earlier design. (XR16C854) - */ - -/* These are only applicable when table D is selected */ -#define UART_17158_FCTR_RTS_NODELAY 0x00 -#define UART_17158_FCTR_RTS_4DELAY 0x01 -#define UART_17158_FCTR_RTS_6DELAY 0x02 -#define UART_17158_FCTR_RTS_8DELAY 0x03 -#define UART_17158_FCTR_RTS_12DELAY 0x12 -#define UART_17158_FCTR_RTS_16DELAY 0x05 -#define UART_17158_FCTR_RTS_20DELAY 0x13 -#define UART_17158_FCTR_RTS_24DELAY 0x06 -#define UART_17158_FCTR_RTS_28DELAY 0x14 -#define UART_17158_FCTR_RTS_32DELAY 0x07 -#define UART_17158_FCTR_RTS_36DELAY 0x16 -#define UART_17158_FCTR_RTS_40DELAY 0x08 -#define UART_17158_FCTR_RTS_44DELAY 0x09 -#define UART_17158_FCTR_RTS_48DELAY 0x10 -#define UART_17158_FCTR_RTS_52DELAY 0x11 - -#define UART_17158_FCTR_RTS_IRDA 0x10 -#define UART_17158_FCTR_RS485 0x20 -#define UART_17158_FCTR_TRGA 0x00 -#define UART_17158_FCTR_TRGB 0x40 -#define UART_17158_FCTR_TRGC 0x80 -#define UART_17158_FCTR_TRGD 0xC0 - -/* 17158 trigger table selects.. */ -#define UART_17158_FCTR_BIT6 0x40 -#define UART_17158_FCTR_BIT7 0x80 - -/* 17158 TX/RX memmapped buffer offsets */ -#define UART_17158_RX_FIFOSIZE 64 -#define UART_17158_TX_FIFOSIZE 64 - -/* 17158 Extended IIR's */ -#define UART_17158_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */ -#define UART_17158_IIR_XONXOFF 0x10 /* Received an XON/XOFF char */ -#define UART_17158_IIR_HWFLOW_STATE_CHANGE 0x20 /* CTS/DSR or RTS/DTR state change */ -#define UART_17158_IIR_FIFO_ENABLED 0xC0 /* 16550 FIFOs are Enabled */ - -/* - * These are the extended interrupts that get sent - * back to us from the UART's 32bit interrupt register - */ -#define UART_17158_RX_LINE_STATUS 0x1 /* RX Ready */ -#define UART_17158_RXRDY_TIMEOUT 0x2 /* RX Ready Timeout */ -#define UART_17158_TXRDY 0x3 /* TX Ready */ -#define UART_17158_MSR 0x4 /* Modem State Change */ -#define UART_17158_TX_AND_FIFO_CLR 0x40 /* Transmitter Holding Reg Empty */ -#define UART_17158_RX_FIFO_DATA_ERROR 0x80 /* UART detected an RX FIFO Data error */ - -/* - * These are the EXTENDED definitions for the 17C158's Interrupt - * Enable Register. - */ -#define UART_17158_EFR_ECB 0x10 /* Enhanced control bit */ -#define UART_17158_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */ -#define UART_17158_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */ -#define UART_17158_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */ -#define UART_17158_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */ - -#define UART_17158_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */ -#define UART_17158_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */ - -#define UART_17158_IER_RSVD1 0x10 /* Reserved by Exar */ -#define UART_17158_IER_XOFF 0x20 /* Xoff Interrupt Enable */ -#define UART_17158_IER_RTSDTR 0x40 /* Output Interrupt Enable */ -#define UART_17158_IER_CTSDSR 0x80 /* Input Interrupt Enable */ - -#define PCI_DEVICE_NEO_2DB9_PCI_NAME "Neo 2 - DB9 Universal PCI" -#define PCI_DEVICE_NEO_2DB9PRI_PCI_NAME "Neo 2 - DB9 Universal PCI - Powered Ring Indicator" -#define PCI_DEVICE_NEO_2RJ45_PCI_NAME "Neo 2 - RJ45 Universal PCI" -#define PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME "Neo 2 - RJ45 Universal PCI - Powered Ring Indicator" -#define PCIE_DEVICE_NEO_IBM_PCI_NAME "Neo 4 - PCI Express - IBM" - -/* - * Our Global Variables. - */ -extern struct uart_driver jsm_uart_driver; -extern struct board_ops jsm_neo_ops; -extern int jsm_debug; - -/************************************************************************* - * - * Prototypes for non-static functions used in more than one module - * - *************************************************************************/ -int jsm_tty_write(struct uart_port *port); -int jsm_tty_init(struct jsm_board *); -int jsm_uart_port_init(struct jsm_board *); -int jsm_remove_uart_port(struct jsm_board *); -void jsm_input(struct jsm_channel *ch); -void jsm_check_queue_flow_control(struct jsm_channel *ch); - -#endif diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c deleted file mode 100644 index 18f548449c63..000000000000 --- a/drivers/serial/jsm/jsm_driver.c +++ /dev/null @@ -1,297 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Wendy Xiong <wendyx@us.ibm.com> - * - * - ***********************************************************************/ -#include <linux/moduleparam.h> -#include <linux/pci.h> -#include <linux/slab.h> - -#include "jsm.h" - -MODULE_AUTHOR("Digi International, http://www.digi.com"); -MODULE_DESCRIPTION("Driver for the Digi International " - "Neo PCI based product line"); -MODULE_LICENSE("GPL"); -MODULE_SUPPORTED_DEVICE("jsm"); - -#define JSM_DRIVER_NAME "jsm" -#define NR_PORTS 32 -#define JSM_MINOR_START 0 - -struct uart_driver jsm_uart_driver = { - .owner = THIS_MODULE, - .driver_name = JSM_DRIVER_NAME, - .dev_name = "ttyn", - .major = 0, - .minor = JSM_MINOR_START, - .nr = NR_PORTS, -}; - -static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state); -static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev); -static void jsm_io_resume(struct pci_dev *pdev); - -static struct pci_error_handlers jsm_err_handler = { - .error_detected = jsm_io_error_detected, - .slot_reset = jsm_io_slot_reset, - .resume = jsm_io_resume, -}; - -int jsm_debug; -module_param(jsm_debug, int, 0); -MODULE_PARM_DESC(jsm_debug, "Driver debugging level"); - -static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - int rc = 0; - struct jsm_board *brd; - static int adapter_count = 0; - - rc = pci_enable_device(pdev); - if (rc) { - dev_err(&pdev->dev, "Device enable FAILED\n"); - goto out; - } - - rc = pci_request_regions(pdev, "jsm"); - if (rc) { - dev_err(&pdev->dev, "pci_request_region FAILED\n"); - goto out_disable_device; - } - - brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL); - if (!brd) { - dev_err(&pdev->dev, - "memory allocation for board structure failed\n"); - rc = -ENOMEM; - goto out_release_regions; - } - - /* store the info for the board we've found */ - brd->boardnum = adapter_count++; - brd->pci_dev = pdev; - if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM) - brd->maxports = 4; - else if (pdev->device == PCI_DEVICE_ID_DIGI_NEO_8) - brd->maxports = 8; - else - brd->maxports = 2; - - spin_lock_init(&brd->bd_intr_lock); - - /* store which revision we have */ - brd->rev = pdev->revision; - - brd->irq = pdev->irq; - - jsm_printk(INIT, INFO, &brd->pci_dev, - "jsm_found_board - NEO adapter\n"); - - /* get the PCI Base Address Registers */ - brd->membase = pci_resource_start(pdev, 0); - brd->membase_end = pci_resource_end(pdev, 0); - - if (brd->membase & 1) - brd->membase &= ~3; - else - brd->membase &= ~15; - - /* Assign the board_ops struct */ - brd->bd_ops = &jsm_neo_ops; - - brd->bd_uart_offset = 0x200; - brd->bd_dividend = 921600; - - brd->re_map_membase = ioremap(brd->membase, 0x1000); - if (!brd->re_map_membase) { - dev_err(&pdev->dev, - "card has no PCI Memory resources, " - "failing board.\n"); - rc = -ENOMEM; - goto out_kfree_brd; - } - - rc = request_irq(brd->irq, brd->bd_ops->intr, - IRQF_SHARED, "JSM", brd); - if (rc) { - printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq); - goto out_iounmap; - } - - rc = jsm_tty_init(brd); - if (rc < 0) { - dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc); - rc = -ENXIO; - goto out_free_irq; - } - - rc = jsm_uart_port_init(brd); - if (rc < 0) { - /* XXX: leaking all resources from jsm_tty_init here! */ - dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc); - rc = -ENXIO; - goto out_free_irq; - } - - /* Log the information about the board */ - dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n", - adapter_count, brd->rev, brd->irq); - - /* - * allocate flip buffer for board. - * - * Okay to malloc with GFP_KERNEL, we are not at interrupt - * context, and there are no locks held. - */ - brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL); - if (!brd->flipbuf) { - /* XXX: leaking all resources from jsm_tty_init and - jsm_uart_port_init here! */ - dev_err(&pdev->dev, "memory allocation for flipbuf failed\n"); - rc = -ENOMEM; - goto out_free_uart; - } - - pci_set_drvdata(pdev, brd); - pci_save_state(pdev); - - return 0; - out_free_uart: - jsm_remove_uart_port(brd); - out_free_irq: - jsm_remove_uart_port(brd); - free_irq(brd->irq, brd); - out_iounmap: - iounmap(brd->re_map_membase); - out_kfree_brd: - kfree(brd); - out_release_regions: - pci_release_regions(pdev); - out_disable_device: - pci_disable_device(pdev); - out: - return rc; -} - -static void __devexit jsm_remove_one(struct pci_dev *pdev) -{ - struct jsm_board *brd = pci_get_drvdata(pdev); - int i = 0; - - jsm_remove_uart_port(brd); - - free_irq(brd->irq, brd); - iounmap(brd->re_map_membase); - - /* Free all allocated channels structs */ - for (i = 0; i < brd->maxports; i++) { - if (brd->channels[i]) { - kfree(brd->channels[i]->ch_rqueue); - kfree(brd->channels[i]->ch_equeue); - kfree(brd->channels[i]->ch_wqueue); - kfree(brd->channels[i]); - } - } - - pci_release_regions(pdev); - pci_disable_device(pdev); - kfree(brd->flipbuf); - kfree(brd); -} - -static struct pci_device_id jsm_pci_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 }, - { 0, } -}; -MODULE_DEVICE_TABLE(pci, jsm_pci_tbl); - -static struct pci_driver jsm_driver = { - .name = "jsm", - .id_table = jsm_pci_tbl, - .probe = jsm_probe_one, - .remove = __devexit_p(jsm_remove_one), - .err_handler = &jsm_err_handler, -}; - -static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state) -{ - struct jsm_board *brd = pci_get_drvdata(pdev); - - jsm_remove_uart_port(brd); - - return PCI_ERS_RESULT_NEED_RESET; -} - -static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev) -{ - int rc; - - rc = pci_enable_device(pdev); - - if (rc) - return PCI_ERS_RESULT_DISCONNECT; - - pci_set_master(pdev); - - return PCI_ERS_RESULT_RECOVERED; -} - -static void jsm_io_resume(struct pci_dev *pdev) -{ - struct jsm_board *brd = pci_get_drvdata(pdev); - - pci_restore_state(pdev); - - jsm_uart_port_init(brd); -} - -static int __init jsm_init_module(void) -{ - int rc; - - rc = uart_register_driver(&jsm_uart_driver); - if (!rc) { - rc = pci_register_driver(&jsm_driver); - if (rc) - uart_unregister_driver(&jsm_uart_driver); - } - return rc; -} - -static void __exit jsm_exit_module(void) -{ - pci_unregister_driver(&jsm_driver); - uart_unregister_driver(&jsm_uart_driver); -} - -module_init(jsm_init_module); -module_exit(jsm_exit_module); diff --git a/drivers/serial/jsm/jsm_neo.c b/drivers/serial/jsm/jsm_neo.c deleted file mode 100644 index 7960d9633c15..000000000000 --- a/drivers/serial/jsm/jsm_neo.c +++ /dev/null @@ -1,1412 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Wendy Xiong <wendyx@us.ibm.com> - * - ***********************************************************************/ -#include <linux/delay.h> /* For udelay */ -#include <linux/serial_reg.h> /* For the various UART offsets */ -#include <linux/tty.h> -#include <linux/pci.h> -#include <asm/io.h> - -#include "jsm.h" /* Driver main header file */ - -static u32 jsm_offset_table[8] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }; - -/* - * This function allows calls to ensure that all outstanding - * PCI writes have been completed, by doing a PCI read against - * a non-destructive, read-only location on the Neo card. - * - * In this case, we are reading the DVID (Read-only Device Identification) - * value of the Neo card. - */ -static inline void neo_pci_posting_flush(struct jsm_board *bd) -{ - readb(bd->re_map_membase + 0x8D); -} - -static void neo_set_cts_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting CTSFLOW\n"); - - /* Turn on auto CTS flow control */ - ier |= (UART_17158_IER_CTSDSR); - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_CTSDSR); - - /* Turn off auto Xon flow control */ - efr &= ~(UART_17158_EFR_IXON); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr); - - /* Feed the UART our trigger levels */ - writeb(8, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 8; - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_rts_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting RTSFLOW\n"); - - /* Turn on auto RTS flow control */ - ier |= (UART_17158_IER_RTSDTR); - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_RTSDTR); - - /* Turn off auto Xoff flow control */ - ier &= ~(UART_17158_IER_XOFF); - efr &= ~(UART_17158_EFR_IXOFF); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr); - ch->ch_r_watermark = 4; - - writeb(56, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 56; - - writeb(ier, &ch->ch_neo_uart->ier); - - /* - * From the Neo UART spec sheet: - * The auto RTS/DTR function must be started by asserting - * RTS/DTR# output pin (MCR bit-0 or 1 to logic 1 after - * it is enabled. - */ - ch->ch_mostat |= (UART_MCR_RTS); -} - - -static void neo_set_ixon_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXON FLOW\n"); - - /* Turn off auto CTS flow control */ - ier &= ~(UART_17158_IER_CTSDSR); - efr &= ~(UART_17158_EFR_CTSDSR); - - /* Turn on auto Xon flow control */ - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXON); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - ch->ch_r_watermark = 4; - - writeb(32, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 32; - - /* Tell UART what start/stop chars it should be looking for */ - writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); - writeb(0, &ch->ch_neo_uart->xonchar2); - - writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); - writeb(0, &ch->ch_neo_uart->xoffchar2); - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_ixoff_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXOFF FLOW\n"); - - /* Turn off auto RTS flow control */ - ier &= ~(UART_17158_IER_RTSDTR); - efr &= ~(UART_17158_EFR_RTSDTR); - - /* Turn on auto Xoff flow control */ - ier |= (UART_17158_IER_XOFF); - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXOFF); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - - writeb(8, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 8; - - /* Tell UART what start/stop chars it should be looking for */ - writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); - writeb(0, &ch->ch_neo_uart->xonchar2); - - writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); - writeb(0, &ch->ch_neo_uart->xoffchar2); - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_no_input_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Input FLOW\n"); - - /* Turn off auto RTS flow control */ - ier &= ~(UART_17158_IER_RTSDTR); - efr &= ~(UART_17158_EFR_RTSDTR); - - /* Turn off auto Xoff flow control */ - ier &= ~(UART_17158_IER_XOFF); - if (ch->ch_c_iflag & IXON) - efr &= ~(UART_17158_EFR_IXOFF); - else - efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXOFF); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - - ch->ch_r_watermark = 0; - - writeb(16, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 16; - - writeb(16, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 16; - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_no_output_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Output FLOW\n"); - - /* Turn off auto CTS flow control */ - ier &= ~(UART_17158_IER_CTSDSR); - efr &= ~(UART_17158_EFR_CTSDSR); - - /* Turn off auto Xon flow control */ - if (ch->ch_c_iflag & IXOFF) - efr &= ~(UART_17158_EFR_IXON); - else - efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXON); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - - ch->ch_r_watermark = 0; - - writeb(16, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 16; - - writeb(16, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 16; - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static inline void neo_set_new_start_stop_chars(struct jsm_channel *ch) -{ - - /* if hardware flow control is set, then skip this whole thing */ - if (ch->ch_c_cflag & CRTSCTS) - return; - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "start\n"); - - /* Tell UART what start/stop chars it should be looking for */ - writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); - writeb(0, &ch->ch_neo_uart->xonchar2); - - writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); - writeb(0, &ch->ch_neo_uart->xoffchar2); -} - -static void neo_copy_data_from_uart_to_queue(struct jsm_channel *ch) -{ - int qleft = 0; - u8 linestatus = 0; - u8 error_mask = 0; - int n = 0; - int total = 0; - u16 head; - u16 tail; - - if (!ch) - return; - - /* cache head and tail of queue */ - head = ch->ch_r_head & RQUEUEMASK; - tail = ch->ch_r_tail & RQUEUEMASK; - - /* Get our cached LSR */ - linestatus = ch->ch_cached_lsr; - ch->ch_cached_lsr = 0; - - /* Store how much space we have left in the queue */ - if ((qleft = tail - head - 1) < 0) - qleft += RQUEUEMASK + 1; - - /* - * If the UART is not in FIFO mode, force the FIFO copy to - * NOT be run, by setting total to 0. - * - * On the other hand, if the UART IS in FIFO mode, then ask - * the UART to give us an approximation of data it has RX'ed. - */ - if (!(ch->ch_flags & CH_FIFO_ENABLED)) - total = 0; - else { - total = readb(&ch->ch_neo_uart->rfifo); - - /* - * EXAR chip bug - RX FIFO COUNT - Fudge factor. - * - * This resolves a problem/bug with the Exar chip that sometimes - * returns a bogus value in the rfifo register. - * The count can be any where from 0-3 bytes "off". - * Bizarre, but true. - */ - total -= 3; - } - - /* - * Finally, bound the copy to make sure we don't overflow - * our own queue... - * The byte by byte copy loop below this loop this will - * deal with the queue overflow possibility. - */ - total = min(total, qleft); - - while (total > 0) { - /* - * Grab the linestatus register, we need to check - * to see if there are any errors in the FIFO. - */ - linestatus = readb(&ch->ch_neo_uart->lsr); - - /* - * Break out if there is a FIFO error somewhere. - * This will allow us to go byte by byte down below, - * finding the exact location of the error. - */ - if (linestatus & UART_17158_RX_FIFO_DATA_ERROR) - break; - - /* Make sure we don't go over the end of our queue */ - n = min(((u32) total), (RQUEUESIZE - (u32) head)); - - /* - * Cut down n even further if needed, this is to fix - * a problem with memcpy_fromio() with the Neo on the - * IBM pSeries platform. - * 15 bytes max appears to be the magic number. - */ - n = min((u32) n, (u32) 12); - - /* - * Since we are grabbing the linestatus register, which - * will reset some bits after our read, we need to ensure - * we don't miss our TX FIFO emptys. - */ - if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - - linestatus = 0; - - /* Copy data from uart to the queue */ - memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, n); - /* - * Since RX_FIFO_DATA_ERROR was 0, we are guarenteed - * that all the data currently in the FIFO is free of - * breaks and parity/frame/orun errors. - */ - memset(ch->ch_equeue + head, 0, n); - - /* Add to and flip head if needed */ - head = (head + n) & RQUEUEMASK; - total -= n; - qleft -= n; - ch->ch_rxcount += n; - } - - /* - * Create a mask to determine whether we should - * insert the character (if any) into our queue. - */ - if (ch->ch_c_iflag & IGNBRK) - error_mask |= UART_LSR_BI; - - /* - * Now cleanup any leftover bytes still in the UART. - * Also deal with any possible queue overflow here as well. - */ - while (1) { - - /* - * Its possible we have a linestatus from the loop above - * this, so we "OR" on any extra bits. - */ - linestatus |= readb(&ch->ch_neo_uart->lsr); - - /* - * If the chip tells us there is no more data pending to - * be read, we can then leave. - * But before we do, cache the linestatus, just in case. - */ - if (!(linestatus & UART_LSR_DR)) { - ch->ch_cached_lsr = linestatus; - break; - } - - /* No need to store this bit */ - linestatus &= ~UART_LSR_DR; - - /* - * Since we are grabbing the linestatus register, which - * will reset some bits after our read, we need to ensure - * we don't miss our TX FIFO emptys. - */ - if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) { - linestatus &= ~(UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - } - - /* - * Discard character if we are ignoring the error mask. - */ - if (linestatus & error_mask) { - u8 discard; - linestatus = 0; - memcpy_fromio(&discard, &ch->ch_neo_uart->txrxburst, 1); - continue; - } - - /* - * If our queue is full, we have no choice but to drop some data. - * The assumption is that HWFLOW or SWFLOW should have stopped - * things way way before we got to this point. - * - * I decided that I wanted to ditch the oldest data first, - * I hope thats okay with everyone? Yes? Good. - */ - while (qleft < 1) { - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Queue full, dropping DATA:%x LSR:%x\n", - ch->ch_rqueue[tail], ch->ch_equeue[tail]); - - ch->ch_r_tail = tail = (tail + 1) & RQUEUEMASK; - ch->ch_err_overrun++; - qleft++; - } - - memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, 1); - ch->ch_equeue[head] = (u8) linestatus; - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "DATA/LSR pair: %x %x\n", ch->ch_rqueue[head], ch->ch_equeue[head]); - - /* Ditch any remaining linestatus value. */ - linestatus = 0; - - /* Add to and flip head if needed */ - head = (head + 1) & RQUEUEMASK; - - qleft--; - ch->ch_rxcount++; - } - - /* - * Write new final heads to channel structure. - */ - ch->ch_r_head = head & RQUEUEMASK; - ch->ch_e_head = head & EQUEUEMASK; - jsm_input(ch); -} - -static void neo_copy_data_from_queue_to_uart(struct jsm_channel *ch) -{ - u16 head; - u16 tail; - int n; - int s; - int qlen; - u32 len_written = 0; - - if (!ch) - return; - - /* No data to write to the UART */ - if (ch->ch_w_tail == ch->ch_w_head) - return; - - /* If port is "stopped", don't send any data to the UART */ - if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_BREAK_SENDING)) - return; - /* - * If FIFOs are disabled. Send data directly to txrx register - */ - if (!(ch->ch_flags & CH_FIFO_ENABLED)) { - u8 lsrbits = readb(&ch->ch_neo_uart->lsr); - - ch->ch_cached_lsr |= lsrbits; - if (ch->ch_cached_lsr & UART_LSR_THRE) { - ch->ch_cached_lsr &= ~(UART_LSR_THRE); - - writeb(ch->ch_wqueue[ch->ch_w_tail], &ch->ch_neo_uart->txrx); - jsm_printk(WRITE, INFO, &ch->ch_bd->pci_dev, - "Tx data: %x\n", ch->ch_wqueue[ch->ch_w_head]); - ch->ch_w_tail++; - ch->ch_w_tail &= WQUEUEMASK; - ch->ch_txcount++; - } - return; - } - - /* - * We have to do it this way, because of the EXAR TXFIFO count bug. - */ - if (!(ch->ch_flags & (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM))) - return; - - n = UART_17158_TX_FIFOSIZE - ch->ch_t_tlevel; - - /* cache head and tail of queue */ - head = ch->ch_w_head & WQUEUEMASK; - tail = ch->ch_w_tail & WQUEUEMASK; - qlen = (head - tail) & WQUEUEMASK; - - /* Find minimum of the FIFO space, versus queue length */ - n = min(n, qlen); - - while (n > 0) { - - s = ((head >= tail) ? head : WQUEUESIZE) - tail; - s = min(s, n); - - if (s <= 0) - break; - - memcpy_toio(&ch->ch_neo_uart->txrxburst, ch->ch_wqueue + tail, s); - /* Add and flip queue if needed */ - tail = (tail + s) & WQUEUEMASK; - n -= s; - ch->ch_txcount += s; - len_written += s; - } - - /* Update the final tail */ - ch->ch_w_tail = tail & WQUEUEMASK; - - if (len_written >= ch->ch_t_tlevel) - ch->ch_flags &= ~(CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - - if (!jsm_tty_write(&ch->uart_port)) - uart_write_wakeup(&ch->uart_port); -} - -static void neo_parse_modem(struct jsm_channel *ch, u8 signals) -{ - u8 msignals = signals; - - jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev, - "neo_parse_modem: port: %d msignals: %x\n", ch->ch_portnum, msignals); - - /* Scrub off lower bits. They signify delta's, which I don't care about */ - /* Keep DDCD and DDSR though */ - msignals &= 0xf8; - - if (msignals & UART_MSR_DDCD) - uart_handle_dcd_change(&ch->uart_port, msignals & UART_MSR_DCD); - if (msignals & UART_MSR_DDSR) - uart_handle_cts_change(&ch->uart_port, msignals & UART_MSR_CTS); - if (msignals & UART_MSR_DCD) - ch->ch_mistat |= UART_MSR_DCD; - else - ch->ch_mistat &= ~UART_MSR_DCD; - - if (msignals & UART_MSR_DSR) - ch->ch_mistat |= UART_MSR_DSR; - else - ch->ch_mistat &= ~UART_MSR_DSR; - - if (msignals & UART_MSR_RI) - ch->ch_mistat |= UART_MSR_RI; - else - ch->ch_mistat &= ~UART_MSR_RI; - - if (msignals & UART_MSR_CTS) - ch->ch_mistat |= UART_MSR_CTS; - else - ch->ch_mistat &= ~UART_MSR_CTS; - - jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev, - "Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n", - ch->ch_portnum, - !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_DTR), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_RTS), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_CTS), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DSR), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_RI), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DCD)); -} - -/* Make the UART raise any of the output signals we want up */ -static void neo_assert_modem_signals(struct jsm_channel *ch) -{ - if (!ch) - return; - - writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - -/* - * Flush the WRITE FIFO on the Neo. - * - * NOTE: Channel lock MUST be held before calling this function! - */ -static void neo_flush_uart_write(struct jsm_channel *ch) -{ - u8 tmp = 0; - int i = 0; - - if (!ch) - return; - - writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr); - - for (i = 0; i < 10; i++) { - - /* Check to see if the UART feels it completely flushed the FIFO. */ - tmp = readb(&ch->ch_neo_uart->isr_fcr); - if (tmp & 4) { - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, - "Still flushing TX UART... i: %d\n", i); - udelay(10); - } - else - break; - } - - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); -} - - -/* - * Flush the READ FIFO on the Neo. - * - * NOTE: Channel lock MUST be held before calling this function! - */ -static void neo_flush_uart_read(struct jsm_channel *ch) -{ - u8 tmp = 0; - int i = 0; - - if (!ch) - return; - - writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR), &ch->ch_neo_uart->isr_fcr); - - for (i = 0; i < 10; i++) { - - /* Check to see if the UART feels it completely flushed the FIFO. */ - tmp = readb(&ch->ch_neo_uart->isr_fcr); - if (tmp & 2) { - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, - "Still flushing RX UART... i: %d\n", i); - udelay(10); - } - else - break; - } -} - -/* - * No locks are assumed to be held when calling this function. - */ -static void neo_clear_break(struct jsm_channel *ch, int force) -{ - unsigned long lock_flags; - - spin_lock_irqsave(&ch->ch_lock, lock_flags); - - /* Turn break off, and unset some variables */ - if (ch->ch_flags & CH_BREAK_SENDING) { - u8 temp = readb(&ch->ch_neo_uart->lcr); - writeb((temp & ~UART_LCR_SBC), &ch->ch_neo_uart->lcr); - - ch->ch_flags &= ~(CH_BREAK_SENDING); - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, - "clear break Finishing UART_LCR_SBC! finished: %lx\n", jiffies); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); -} - -/* - * Parse the ISR register. - */ -static inline void neo_parse_isr(struct jsm_board *brd, u32 port) -{ - struct jsm_channel *ch; - u8 isr; - u8 cause; - unsigned long lock_flags; - - if (!brd) - return; - - if (port > brd->maxports) - return; - - ch = brd->channels[port]; - if (!ch) - return; - - /* Here we try to figure out what caused the interrupt to happen */ - while (1) { - - isr = readb(&ch->ch_neo_uart->isr_fcr); - - /* Bail if no pending interrupt */ - if (isr & UART_IIR_NO_INT) - break; - - /* - * Yank off the upper 2 bits, which just show that the FIFO's are enabled. - */ - isr &= ~(UART_17158_IIR_FIFO_ENABLED); - - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "%s:%d isr: %x\n", __FILE__, __LINE__, isr); - - if (isr & (UART_17158_IIR_RDI_TIMEOUT | UART_IIR_RDI)) { - /* Read data from uart -> queue */ - neo_copy_data_from_uart_to_queue(ch); - - /* Call our tty layer to enforce queue flow control if needed. */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - if (isr & UART_IIR_THRI) { - /* Transfer data (if any) from Write Queue -> UART. */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - neo_copy_data_from_queue_to_uart(ch); - } - - if (isr & UART_17158_IIR_XONXOFF) { - cause = readb(&ch->ch_neo_uart->xoffchar1); - - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Port %d. Got ISR_XONXOFF: cause:%x\n", port, cause); - - /* - * Since the UART detected either an XON or - * XOFF match, we need to figure out which - * one it was, so we can suspend or resume data flow. - */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - if (cause == UART_17158_XON_DETECT) { - /* Is output stopped right now, if so, resume it */ - if (brd->channels[port]->ch_flags & CH_STOP) { - ch->ch_flags &= ~(CH_STOP); - } - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Port %d. XON detected in incoming data\n", port); - } - else if (cause == UART_17158_XOFF_DETECT) { - if (!(brd->channels[port]->ch_flags & CH_STOP)) { - ch->ch_flags |= CH_STOP; - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Setting CH_STOP\n"); - } - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Port: %d. XOFF detected in incoming data\n", port); - } - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - if (isr & UART_17158_IIR_HWFLOW_STATE_CHANGE) { - /* - * If we get here, this means the hardware is doing auto flow control. - * Check to see whether RTS/DTR or CTS/DSR caused this interrupt. - */ - cause = readb(&ch->ch_neo_uart->mcr); - - /* Which pin is doing auto flow? RTS or DTR? */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - if ((cause & 0x4) == 0) { - if (cause & UART_MCR_RTS) - ch->ch_mostat |= UART_MCR_RTS; - else - ch->ch_mostat &= ~(UART_MCR_RTS); - } else { - if (cause & UART_MCR_DTR) - ch->ch_mostat |= UART_MCR_DTR; - else - ch->ch_mostat &= ~(UART_MCR_DTR); - } - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - /* Parse any modem signal changes */ - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "MOD_STAT: sending to parse_modem_sigs\n"); - neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); - } -} - -static inline void neo_parse_lsr(struct jsm_board *brd, u32 port) -{ - struct jsm_channel *ch; - int linestatus; - unsigned long lock_flags; - - if (!brd) - return; - - if (port > brd->maxports) - return; - - ch = brd->channels[port]; - if (!ch) - return; - - linestatus = readb(&ch->ch_neo_uart->lsr); - - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "%s:%d port: %d linestatus: %x\n", __FILE__, __LINE__, port, linestatus); - - ch->ch_cached_lsr |= linestatus; - - if (ch->ch_cached_lsr & UART_LSR_DR) { - /* Read data from uart -> queue */ - neo_copy_data_from_uart_to_queue(ch); - spin_lock_irqsave(&ch->ch_lock, lock_flags); - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - /* - * This is a special flag. It indicates that at least 1 - * RX error (parity, framing, or break) has happened. - * Mark this in our struct, which will tell me that I have - *to do the special RX+LSR read for this FIFO load. - */ - if (linestatus & UART_17158_RX_FIFO_DATA_ERROR) - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d Got an RX error, need to parse LSR\n", - __FILE__, __LINE__, port); - - /* - * The next 3 tests should *NOT* happen, as the above test - * should encapsulate all 3... At least, thats what Exar says. - */ - - if (linestatus & UART_LSR_PE) { - ch->ch_err_parity++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. PAR ERR!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_FE) { - ch->ch_err_frame++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. FRM ERR!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_BI) { - ch->ch_err_break++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. BRK INTR!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_OE) { - /* - * Rx Oruns. Exar says that an orun will NOT corrupt - * the FIFO. It will just replace the holding register - * with this new data byte. So basically just ignore this. - * Probably we should eventually have an orun stat in our driver... - */ - ch->ch_err_overrun++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. Rx Overrun!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_THRE) { - spin_lock_irqsave(&ch->ch_lock, lock_flags); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - - /* Transfer data (if any) from Write Queue -> UART. */ - neo_copy_data_from_queue_to_uart(ch); - } - else if (linestatus & UART_17158_TX_AND_FIFO_CLR) { - spin_lock_irqsave(&ch->ch_lock, lock_flags); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - - /* Transfer data (if any) from Write Queue -> UART. */ - neo_copy_data_from_queue_to_uart(ch); - } -} - -/* - * neo_param() - * Send any/all changes to the line to the UART. - */ -static void neo_param(struct jsm_channel *ch) -{ - u8 lcr = 0; - u8 uart_lcr, ier; - u32 baud; - int quot; - struct jsm_board *bd; - - bd = ch->ch_bd; - if (!bd) - return; - - /* - * If baud rate is zero, flush queues, and set mval to drop DTR. - */ - if ((ch->ch_c_cflag & (CBAUD)) == 0) { - ch->ch_r_head = ch->ch_r_tail = 0; - ch->ch_e_head = ch->ch_e_tail = 0; - ch->ch_w_head = ch->ch_w_tail = 0; - - neo_flush_uart_write(ch); - neo_flush_uart_read(ch); - - ch->ch_flags |= (CH_BAUD0); - ch->ch_mostat &= ~(UART_MCR_RTS | UART_MCR_DTR); - neo_assert_modem_signals(ch); - return; - - } else { - int i; - unsigned int cflag; - static struct { - unsigned int rate; - unsigned int cflag; - } baud_rates[] = { - { 921600, B921600 }, - { 460800, B460800 }, - { 230400, B230400 }, - { 115200, B115200 }, - { 57600, B57600 }, - { 38400, B38400 }, - { 19200, B19200 }, - { 9600, B9600 }, - { 4800, B4800 }, - { 2400, B2400 }, - { 1200, B1200 }, - { 600, B600 }, - { 300, B300 }, - { 200, B200 }, - { 150, B150 }, - { 134, B134 }, - { 110, B110 }, - { 75, B75 }, - { 50, B50 }, - }; - - cflag = C_BAUD(ch->uart_port.state->port.tty); - baud = 9600; - for (i = 0; i < ARRAY_SIZE(baud_rates); i++) { - if (baud_rates[i].cflag == cflag) { - baud = baud_rates[i].rate; - break; - } - } - - if (ch->ch_flags & CH_BAUD0) - ch->ch_flags &= ~(CH_BAUD0); - } - - if (ch->ch_c_cflag & PARENB) - lcr |= UART_LCR_PARITY; - - if (!(ch->ch_c_cflag & PARODD)) - lcr |= UART_LCR_EPAR; - - /* - * Not all platforms support mark/space parity, - * so this will hide behind an ifdef. - */ -#ifdef CMSPAR - if (ch->ch_c_cflag & CMSPAR) - lcr |= UART_LCR_SPAR; -#endif - - if (ch->ch_c_cflag & CSTOPB) - lcr |= UART_LCR_STOP; - - switch (ch->ch_c_cflag & CSIZE) { - case CS5: - lcr |= UART_LCR_WLEN5; - break; - case CS6: - lcr |= UART_LCR_WLEN6; - break; - case CS7: - lcr |= UART_LCR_WLEN7; - break; - case CS8: - default: - lcr |= UART_LCR_WLEN8; - break; - } - - ier = readb(&ch->ch_neo_uart->ier); - uart_lcr = readb(&ch->ch_neo_uart->lcr); - - if (baud == 0) - baud = 9600; - - quot = ch->ch_bd->bd_dividend / baud; - - if (quot != 0) { - writeb(UART_LCR_DLAB, &ch->ch_neo_uart->lcr); - writeb((quot & 0xff), &ch->ch_neo_uart->txrx); - writeb((quot >> 8), &ch->ch_neo_uart->ier); - writeb(lcr, &ch->ch_neo_uart->lcr); - } - - if (uart_lcr != lcr) - writeb(lcr, &ch->ch_neo_uart->lcr); - - if (ch->ch_c_cflag & CREAD) - ier |= (UART_IER_RDI | UART_IER_RLSI); - - ier |= (UART_IER_THRI | UART_IER_MSI); - - writeb(ier, &ch->ch_neo_uart->ier); - - /* Set new start/stop chars */ - neo_set_new_start_stop_chars(ch); - - if (ch->ch_c_cflag & CRTSCTS) - neo_set_cts_flow_control(ch); - else if (ch->ch_c_iflag & IXON) { - /* If start/stop is set to disable, then we should disable flow control */ - if ((ch->ch_startc == __DISABLED_CHAR) || (ch->ch_stopc == __DISABLED_CHAR)) - neo_set_no_output_flow_control(ch); - else - neo_set_ixon_flow_control(ch); - } - else - neo_set_no_output_flow_control(ch); - - if (ch->ch_c_cflag & CRTSCTS) - neo_set_rts_flow_control(ch); - else if (ch->ch_c_iflag & IXOFF) { - /* If start/stop is set to disable, then we should disable flow control */ - if ((ch->ch_startc == __DISABLED_CHAR) || (ch->ch_stopc == __DISABLED_CHAR)) - neo_set_no_input_flow_control(ch); - else - neo_set_ixoff_flow_control(ch); - } - else - neo_set_no_input_flow_control(ch); - /* - * Adjust the RX FIFO Trigger level if baud is less than 9600. - * Not exactly elegant, but this is needed because of the Exar chip's - * delay on firing off the RX FIFO interrupt on slower baud rates. - */ - if (baud < 9600) { - writeb(1, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 1; - } - - neo_assert_modem_signals(ch); - - /* Get current status of the modem signals now */ - neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); - return; -} - -/* - * jsm_neo_intr() - * - * Neo specific interrupt handler. - */ -static irqreturn_t neo_intr(int irq, void *voidbrd) -{ - struct jsm_board *brd = voidbrd; - struct jsm_channel *ch; - int port = 0; - int type = 0; - int current_port; - u32 tmp; - u32 uart_poll; - unsigned long lock_flags; - unsigned long lock_flags2; - int outofloop_count = 0; - - /* Lock out the slow poller from running on this board. */ - spin_lock_irqsave(&brd->bd_intr_lock, lock_flags); - - /* - * Read in "extended" IRQ information from the 32bit Neo register. - * Bits 0-7: What port triggered the interrupt. - * Bits 8-31: Each 3bits indicate what type of interrupt occurred. - */ - uart_poll = readl(brd->re_map_membase + UART_17158_POLL_ADDR_OFFSET); - - jsm_printk(INTR, INFO, &brd->pci_dev, - "%s:%d uart_poll: %x\n", __FILE__, __LINE__, uart_poll); - - if (!uart_poll) { - jsm_printk(INTR, INFO, &brd->pci_dev, - "Kernel interrupted to me, but no pending interrupts...\n"); - spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags); - return IRQ_NONE; - } - - /* At this point, we have at least SOMETHING to service, dig further... */ - - current_port = 0; - - /* Loop on each port */ - while (((uart_poll & 0xff) != 0) && (outofloop_count < 0xff)){ - - tmp = uart_poll; - outofloop_count++; - - /* Check current port to see if it has interrupt pending */ - if ((tmp & jsm_offset_table[current_port]) != 0) { - port = current_port; - type = tmp >> (8 + (port * 3)); - type &= 0x7; - } else { - current_port++; - continue; - } - - jsm_printk(INTR, INFO, &brd->pci_dev, - "%s:%d port: %x type: %x\n", __FILE__, __LINE__, port, type); - - /* Remove this port + type from uart_poll */ - uart_poll &= ~(jsm_offset_table[port]); - - if (!type) { - /* If no type, just ignore it, and move onto next port */ - jsm_printk(INTR, ERR, &brd->pci_dev, - "Interrupt with no type! port: %d\n", port); - continue; - } - - /* Switch on type of interrupt we have */ - switch (type) { - - case UART_17158_RXRDY_TIMEOUT: - /* - * RXRDY Time-out is cleared by reading data in the - * RX FIFO until it falls below the trigger level. - */ - - /* Verify the port is in range. */ - if (port > brd->nasync) - continue; - - ch = brd->channels[port]; - neo_copy_data_from_uart_to_queue(ch); - - /* Call our tty layer to enforce queue flow control if needed. */ - spin_lock_irqsave(&ch->ch_lock, lock_flags2); - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags2); - - continue; - - case UART_17158_RX_LINE_STATUS: - /* - * RXRDY and RX LINE Status (logic OR of LSR[4:1]) - */ - neo_parse_lsr(brd, port); - continue; - - case UART_17158_TXRDY: - /* - * TXRDY interrupt clears after reading ISR register for the UART channel. - */ - - /* - * Yes, this is odd... - * Why would I check EVERY possibility of type of - * interrupt, when we know its TXRDY??? - * Becuz for some reason, even tho we got triggered for TXRDY, - * it seems to be occassionally wrong. Instead of TX, which - * it should be, I was getting things like RXDY too. Weird. - */ - neo_parse_isr(brd, port); - continue; - - case UART_17158_MSR: - /* - * MSR or flow control was seen. - */ - neo_parse_isr(brd, port); - continue; - - default: - /* - * The UART triggered us with a bogus interrupt type. - * It appears the Exar chip, when REALLY bogged down, will throw - * these once and awhile. - * Its harmless, just ignore it and move on. - */ - jsm_printk(INTR, ERR, &brd->pci_dev, - "%s:%d Unknown Interrupt type: %x\n", __FILE__, __LINE__, type); - continue; - } - } - - spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags); - - jsm_printk(INTR, INFO, &brd->pci_dev, "finish.\n"); - return IRQ_HANDLED; -} - -/* - * Neo specific way of turning off the receiver. - * Used as a way to enforce queue flow control when in - * hardware flow control mode. - */ -static void neo_disable_receiver(struct jsm_channel *ch) -{ - u8 tmp = readb(&ch->ch_neo_uart->ier); - tmp &= ~(UART_IER_RDI); - writeb(tmp, &ch->ch_neo_uart->ier); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - - -/* - * Neo specific way of turning on the receiver. - * Used as a way to un-enforce queue flow control when in - * hardware flow control mode. - */ -static void neo_enable_receiver(struct jsm_channel *ch) -{ - u8 tmp = readb(&ch->ch_neo_uart->ier); - tmp |= (UART_IER_RDI); - writeb(tmp, &ch->ch_neo_uart->ier); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - -static void neo_send_start_character(struct jsm_channel *ch) -{ - if (!ch) - return; - - if (ch->ch_startc != __DISABLED_CHAR) { - ch->ch_xon_sends++; - writeb(ch->ch_startc, &ch->ch_neo_uart->txrx); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } -} - -static void neo_send_stop_character(struct jsm_channel *ch) -{ - if (!ch) - return; - - if (ch->ch_stopc != __DISABLED_CHAR) { - ch->ch_xoff_sends++; - writeb(ch->ch_stopc, &ch->ch_neo_uart->txrx); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } -} - -/* - * neo_uart_init - */ -static void neo_uart_init(struct jsm_channel *ch) -{ - writeb(0, &ch->ch_neo_uart->ier); - writeb(0, &ch->ch_neo_uart->efr); - writeb(UART_EFR_ECB, &ch->ch_neo_uart->efr); - - /* Clear out UART and FIFO */ - readb(&ch->ch_neo_uart->txrx); - writeb((UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR|UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr); - readb(&ch->ch_neo_uart->lsr); - readb(&ch->ch_neo_uart->msr); - - ch->ch_flags |= CH_FIFO_ENABLED; - - /* Assert any signals we want up */ - writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr); -} - -/* - * Make the UART completely turn off. - */ -static void neo_uart_off(struct jsm_channel *ch) -{ - /* Turn off UART enhanced bits */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Stop all interrupts from occurring. */ - writeb(0, &ch->ch_neo_uart->ier); -} - -static u32 neo_get_uart_bytes_left(struct jsm_channel *ch) -{ - u8 left = 0; - u8 lsr = readb(&ch->ch_neo_uart->lsr); - - /* We must cache the LSR as some of the bits get reset once read... */ - ch->ch_cached_lsr |= lsr; - - /* Determine whether the Transmitter is empty or not */ - if (!(lsr & UART_LSR_TEMT)) - left = 1; - else { - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - left = 0; - } - - return left; -} - -/* Channel lock MUST be held by the calling function! */ -static void neo_send_break(struct jsm_channel *ch) -{ - /* - * Set the time we should stop sending the break. - * If we are already sending a break, toss away the existing - * time to stop, and use this new value instead. - */ - - /* Tell the UART to start sending the break */ - if (!(ch->ch_flags & CH_BREAK_SENDING)) { - u8 temp = readb(&ch->ch_neo_uart->lcr); - writeb((temp | UART_LCR_SBC), &ch->ch_neo_uart->lcr); - ch->ch_flags |= (CH_BREAK_SENDING); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } -} - -/* - * neo_send_immediate_char. - * - * Sends a specific character as soon as possible to the UART, - * jumping over any bytes that might be in the write queue. - * - * The channel lock MUST be held by the calling function. - */ -static void neo_send_immediate_char(struct jsm_channel *ch, unsigned char c) -{ - if (!ch) - return; - - writeb(c, &ch->ch_neo_uart->txrx); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - -struct board_ops jsm_neo_ops = { - .intr = neo_intr, - .uart_init = neo_uart_init, - .uart_off = neo_uart_off, - .param = neo_param, - .assert_modem_signals = neo_assert_modem_signals, - .flush_uart_write = neo_flush_uart_write, - .flush_uart_read = neo_flush_uart_read, - .disable_receiver = neo_disable_receiver, - .enable_receiver = neo_enable_receiver, - .send_break = neo_send_break, - .clear_break = neo_clear_break, - .send_start_character = neo_send_start_character, - .send_stop_character = neo_send_stop_character, - .copy_data_from_queue_to_uart = neo_copy_data_from_queue_to_uart, - .get_uart_bytes_left = neo_get_uart_bytes_left, - .send_immediate_char = neo_send_immediate_char -}; diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c deleted file mode 100644 index 7a4a914ecff0..000000000000 --- a/drivers/serial/jsm/jsm_tty.c +++ /dev/null @@ -1,910 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Ananda Venkatarman <mansarov@us.ibm.com> - * Modifications: - * 01/19/06: changed jsm_input routine to use the dynamically allocated - * tty_buffer changes. Contributors: Scott Kilau and Ananda V. - ***********************************************************************/ -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_reg.h> -#include <linux/delay.h> /* For udelay */ -#include <linux/pci.h> -#include <linux/slab.h> - -#include "jsm.h" - -static DECLARE_BITMAP(linemap, MAXLINES); - -static void jsm_carrier(struct jsm_channel *ch); - -static inline int jsm_get_mstat(struct jsm_channel *ch) -{ - unsigned char mstat; - unsigned result; - - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "start\n"); - - mstat = (ch->ch_mostat | ch->ch_mistat); - - result = 0; - - if (mstat & UART_MCR_DTR) - result |= TIOCM_DTR; - if (mstat & UART_MCR_RTS) - result |= TIOCM_RTS; - if (mstat & UART_MSR_CTS) - result |= TIOCM_CTS; - if (mstat & UART_MSR_DSR) - result |= TIOCM_DSR; - if (mstat & UART_MSR_RI) - result |= TIOCM_RI; - if (mstat & UART_MSR_DCD) - result |= TIOCM_CD; - - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n"); - return result; -} - -static unsigned int jsm_tty_tx_empty(struct uart_port *port) -{ - return TIOCSER_TEMT; -} - -/* - * Return modem signals to ld. - */ -static unsigned int jsm_tty_get_mctrl(struct uart_port *port) -{ - int result; - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - result = jsm_get_mstat(channel); - - if (result < 0) - return -ENXIO; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); - - return result; -} - -/* - * jsm_set_modem_info() - * - * Set modem signals, called by ld. - */ -static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - if (mctrl & TIOCM_RTS) - channel->ch_mostat |= UART_MCR_RTS; - else - channel->ch_mostat &= ~UART_MCR_RTS; - - if (mctrl & TIOCM_DTR) - channel->ch_mostat |= UART_MCR_DTR; - else - channel->ch_mostat &= ~UART_MCR_DTR; - - channel->ch_bd->bd_ops->assert_modem_signals(channel); - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); - udelay(10); -} - -static void jsm_tty_start_tx(struct uart_port *port) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - channel->ch_flags &= ~(CH_STOP); - jsm_tty_write(port); - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_tty_stop_tx(struct uart_port *port) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - channel->ch_flags |= (CH_STOP); - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_tty_send_xchar(struct uart_port *port, char ch) -{ - unsigned long lock_flags; - struct jsm_channel *channel = (struct jsm_channel *)port; - struct ktermios *termios; - - spin_lock_irqsave(&port->lock, lock_flags); - termios = port->state->port.tty->termios; - if (ch == termios->c_cc[VSTART]) - channel->ch_bd->bd_ops->send_start_character(channel); - - if (ch == termios->c_cc[VSTOP]) - channel->ch_bd->bd_ops->send_stop_character(channel); - spin_unlock_irqrestore(&port->lock, lock_flags); -} - -static void jsm_tty_stop_rx(struct uart_port *port) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - channel->ch_bd->bd_ops->disable_receiver(channel); -} - -static void jsm_tty_enable_ms(struct uart_port *port) -{ - /* Nothing needed */ -} - -static void jsm_tty_break(struct uart_port *port, int break_state) -{ - unsigned long lock_flags; - struct jsm_channel *channel = (struct jsm_channel *)port; - - spin_lock_irqsave(&port->lock, lock_flags); - if (break_state == -1) - channel->ch_bd->bd_ops->send_break(channel); - else - channel->ch_bd->bd_ops->clear_break(channel, 0); - - spin_unlock_irqrestore(&port->lock, lock_flags); -} - -static int jsm_tty_open(struct uart_port *port) -{ - struct jsm_board *brd; - struct jsm_channel *channel = (struct jsm_channel *)port; - struct ktermios *termios; - - /* Get board pointer from our array of majors we have allocated */ - brd = channel->ch_bd; - - /* - * Allocate channel buffers for read/write/error. - * Set flag, so we don't get trounced on. - */ - channel->ch_flags |= (CH_OPENING); - - /* Drop locks, as malloc with GFP_KERNEL can sleep */ - - if (!channel->ch_rqueue) { - channel->ch_rqueue = kzalloc(RQUEUESIZE, GFP_KERNEL); - if (!channel->ch_rqueue) { - jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev, - "unable to allocate read queue buf"); - return -ENOMEM; - } - } - if (!channel->ch_equeue) { - channel->ch_equeue = kzalloc(EQUEUESIZE, GFP_KERNEL); - if (!channel->ch_equeue) { - jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev, - "unable to allocate error queue buf"); - return -ENOMEM; - } - } - if (!channel->ch_wqueue) { - channel->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL); - if (!channel->ch_wqueue) { - jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev, - "unable to allocate write queue buf"); - return -ENOMEM; - } - } - - channel->ch_flags &= ~(CH_OPENING); - /* - * Initialize if neither terminal is open. - */ - jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev, - "jsm_open: initializing channel in open...\n"); - - /* - * Flush input queues. - */ - channel->ch_r_head = channel->ch_r_tail = 0; - channel->ch_e_head = channel->ch_e_tail = 0; - channel->ch_w_head = channel->ch_w_tail = 0; - - brd->bd_ops->flush_uart_write(channel); - brd->bd_ops->flush_uart_read(channel); - - channel->ch_flags = 0; - channel->ch_cached_lsr = 0; - channel->ch_stops_sent = 0; - - termios = port->state->port.tty->termios; - channel->ch_c_cflag = termios->c_cflag; - channel->ch_c_iflag = termios->c_iflag; - channel->ch_c_oflag = termios->c_oflag; - channel->ch_c_lflag = termios->c_lflag; - channel->ch_startc = termios->c_cc[VSTART]; - channel->ch_stopc = termios->c_cc[VSTOP]; - - /* Tell UART to init itself */ - brd->bd_ops->uart_init(channel); - - /* - * Run param in case we changed anything - */ - brd->bd_ops->param(channel); - - jsm_carrier(channel); - - channel->ch_open_count++; - - jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev, "finish\n"); - return 0; -} - -static void jsm_tty_close(struct uart_port *port) -{ - struct jsm_board *bd; - struct ktermios *ts; - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "start\n"); - - bd = channel->ch_bd; - ts = port->state->port.tty->termios; - - channel->ch_flags &= ~(CH_STOPI); - - channel->ch_open_count--; - - /* - * If we have HUPCL set, lower DTR and RTS - */ - if (channel->ch_c_cflag & HUPCL) { - jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, - "Close. HUPCL set, dropping DTR/RTS\n"); - - /* Drop RTS/DTR */ - channel->ch_mostat &= ~(UART_MCR_DTR | UART_MCR_RTS); - bd->bd_ops->assert_modem_signals(channel); - } - - /* Turn off UART interrupts for this port */ - channel->ch_bd->bd_ops->uart_off(channel); - - jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_tty_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old_termios) -{ - unsigned long lock_flags; - struct jsm_channel *channel = (struct jsm_channel *)port; - - spin_lock_irqsave(&port->lock, lock_flags); - channel->ch_c_cflag = termios->c_cflag; - channel->ch_c_iflag = termios->c_iflag; - channel->ch_c_oflag = termios->c_oflag; - channel->ch_c_lflag = termios->c_lflag; - channel->ch_startc = termios->c_cc[VSTART]; - channel->ch_stopc = termios->c_cc[VSTOP]; - - channel->ch_bd->bd_ops->param(channel); - jsm_carrier(channel); - spin_unlock_irqrestore(&port->lock, lock_flags); -} - -static const char *jsm_tty_type(struct uart_port *port) -{ - return "jsm"; -} - -static void jsm_tty_release_port(struct uart_port *port) -{ -} - -static int jsm_tty_request_port(struct uart_port *port) -{ - return 0; -} - -static void jsm_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_JSM; -} - -static struct uart_ops jsm_ops = { - .tx_empty = jsm_tty_tx_empty, - .set_mctrl = jsm_tty_set_mctrl, - .get_mctrl = jsm_tty_get_mctrl, - .stop_tx = jsm_tty_stop_tx, - .start_tx = jsm_tty_start_tx, - .send_xchar = jsm_tty_send_xchar, - .stop_rx = jsm_tty_stop_rx, - .enable_ms = jsm_tty_enable_ms, - .break_ctl = jsm_tty_break, - .startup = jsm_tty_open, - .shutdown = jsm_tty_close, - .set_termios = jsm_tty_set_termios, - .type = jsm_tty_type, - .release_port = jsm_tty_release_port, - .request_port = jsm_tty_request_port, - .config_port = jsm_config_port, -}; - -/* - * jsm_tty_init() - * - * Init the tty subsystem. Called once per board after board has been - * downloaded and init'ed. - */ -int __devinit jsm_tty_init(struct jsm_board *brd) -{ - int i; - void __iomem *vaddr; - struct jsm_channel *ch; - - if (!brd) - return -ENXIO; - - jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); - - /* - * Initialize board structure elements. - */ - - brd->nasync = brd->maxports; - - /* - * Allocate channel memory that might not have been allocated - * when the driver was first loaded. - */ - for (i = 0; i < brd->nasync; i++) { - if (!brd->channels[i]) { - - /* - * Okay to malloc with GFP_KERNEL, we are not at - * interrupt context, and there are no locks held. - */ - brd->channels[i] = kzalloc(sizeof(struct jsm_channel), GFP_KERNEL); - if (!brd->channels[i]) { - jsm_printk(CORE, ERR, &brd->pci_dev, - "%s:%d Unable to allocate memory for channel struct\n", - __FILE__, __LINE__); - } - } - } - - ch = brd->channels[0]; - vaddr = brd->re_map_membase; - - /* Set up channel variables */ - for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) { - - if (!brd->channels[i]) - continue; - - spin_lock_init(&ch->ch_lock); - - if (brd->bd_uart_offset == 0x200) - ch->ch_neo_uart = vaddr + (brd->bd_uart_offset * i); - - ch->ch_bd = brd; - ch->ch_portnum = i; - - /* .25 second delay */ - ch->ch_close_delay = 250; - - init_waitqueue_head(&ch->ch_flags_wait); - } - - jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n"); - return 0; -} - -int jsm_uart_port_init(struct jsm_board *brd) -{ - int i, rc; - unsigned int line; - struct jsm_channel *ch; - - if (!brd) - return -ENXIO; - - jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); - - /* - * Initialize board structure elements. - */ - - brd->nasync = brd->maxports; - - /* Set up channel variables */ - for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) { - - if (!brd->channels[i]) - continue; - - brd->channels[i]->uart_port.irq = brd->irq; - brd->channels[i]->uart_port.uartclk = 14745600; - brd->channels[i]->uart_port.type = PORT_JSM; - brd->channels[i]->uart_port.iotype = UPIO_MEM; - brd->channels[i]->uart_port.membase = brd->re_map_membase; - brd->channels[i]->uart_port.fifosize = 16; - brd->channels[i]->uart_port.ops = &jsm_ops; - line = find_first_zero_bit(linemap, MAXLINES); - if (line >= MAXLINES) { - printk(KERN_INFO "jsm: linemap is full, added device failed\n"); - continue; - } else - set_bit(line, linemap); - brd->channels[i]->uart_port.line = line; - rc = uart_add_one_port (&jsm_uart_driver, &brd->channels[i]->uart_port); - if (rc){ - printk(KERN_INFO "jsm: Port %d failed. Aborting...\n", i); - return rc; - } - else - printk(KERN_INFO "jsm: Port %d added\n", i); - } - - jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n"); - return 0; -} - -int jsm_remove_uart_port(struct jsm_board *brd) -{ - int i; - struct jsm_channel *ch; - - if (!brd) - return -ENXIO; - - jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); - - /* - * Initialize board structure elements. - */ - - brd->nasync = brd->maxports; - - /* Set up channel variables */ - for (i = 0; i < brd->nasync; i++) { - - if (!brd->channels[i]) - continue; - - ch = brd->channels[i]; - - clear_bit(ch->uart_port.line, linemap); - uart_remove_one_port(&jsm_uart_driver, &brd->channels[i]->uart_port); - } - - jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n"); - return 0; -} - -void jsm_input(struct jsm_channel *ch) -{ - struct jsm_board *bd; - struct tty_struct *tp; - u32 rmask; - u16 head; - u16 tail; - int data_len; - unsigned long lock_flags; - int len = 0; - int n = 0; - int s = 0; - int i = 0; - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n"); - - if (!ch) - return; - - tp = ch->uart_port.state->port.tty; - - bd = ch->ch_bd; - if(!bd) - return; - - spin_lock_irqsave(&ch->ch_lock, lock_flags); - - /* - *Figure the number of characters in the buffer. - *Exit immediately if none. - */ - - rmask = RQUEUEMASK; - - head = ch->ch_r_head & rmask; - tail = ch->ch_r_tail & rmask; - - data_len = (head - tail) & rmask; - if (data_len == 0) { - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - return; - } - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n"); - - /* - *If the device is not open, or CREAD is off, flush - *input data and return immediately. - */ - if (!tp || - !(tp->termios->c_cflag & CREAD) ) { - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum); - ch->ch_r_head = tail; - - /* Force queue flow control to be released, if needed */ - jsm_check_queue_flow_control(ch); - - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - return; - } - - /* - * If we are throttled, simply don't read any data. - */ - if (ch->ch_flags & CH_STOPI) { - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Port %d throttled, not reading any data. head: %x tail: %x\n", - ch->ch_portnum, head, tail); - return; - } - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start 2\n"); - - if (data_len <= 0) { - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "jsm_input 1\n"); - return; - } - - len = tty_buffer_request_room(tp, data_len); - n = len; - - /* - * n now contains the most amount of data we can copy, - * bounded either by the flip buffer size or the amount - * of data the card actually has pending... - */ - while (n) { - s = ((head >= tail) ? head : RQUEUESIZE) - tail; - s = min(s, n); - - if (s <= 0) - break; - - /* - * If conditions are such that ld needs to see all - * UART errors, we will have to walk each character - * and error byte and send them to the buffer one at - * a time. - */ - - if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) { - for (i = 0; i < s; i++) { - /* - * Give the Linux ld the flags in the - * format it likes. - */ - if (*(ch->ch_equeue +tail +i) & UART_LSR_BI) - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_BREAK); - else if (*(ch->ch_equeue +tail +i) & UART_LSR_PE) - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_PARITY); - else if (*(ch->ch_equeue +tail +i) & UART_LSR_FE) - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_FRAME); - else - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_NORMAL); - } - } else { - tty_insert_flip_string(tp, ch->ch_rqueue + tail, s) ; - } - tail += s; - n -= s; - /* Flip queue if needed */ - tail &= rmask; - } - - ch->ch_r_tail = tail & rmask; - ch->ch_e_tail = tail & rmask; - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - - /* Tell the tty layer its okay to "eat" the data now */ - tty_flip_buffer_push(tp); - - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_carrier(struct jsm_channel *ch) -{ - struct jsm_board *bd; - - int virt_carrier = 0; - int phys_carrier = 0; - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, "start\n"); - if (!ch) - return; - - bd = ch->ch_bd; - - if (!bd) - return; - - if (ch->ch_mistat & UART_MSR_DCD) { - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "mistat: %x D_CD: %x\n", ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD); - phys_carrier = 1; - } - - if (ch->ch_c_cflag & CLOCAL) - virt_carrier = 1; - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier); - - /* - * Test for a VIRTUAL carrier transition to HIGH. - */ - if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) { - - /* - * When carrier rises, wake any threads waiting - * for carrier in the open routine. - */ - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "carrier: virt DCD rose\n"); - - if (waitqueue_active(&(ch->ch_flags_wait))) - wake_up_interruptible(&ch->ch_flags_wait); - } - - /* - * Test for a PHYSICAL carrier transition to HIGH. - */ - if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) { - - /* - * When carrier rises, wake any threads waiting - * for carrier in the open routine. - */ - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "carrier: physical DCD rose\n"); - - if (waitqueue_active(&(ch->ch_flags_wait))) - wake_up_interruptible(&ch->ch_flags_wait); - } - - /* - * Test for a PHYSICAL transition to low, so long as we aren't - * currently ignoring physical transitions (which is what "virtual - * carrier" indicates). - * - * The transition of the virtual carrier to low really doesn't - * matter... it really only means "ignore carrier state", not - * "make pretend that carrier is there". - */ - if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0) - && (phys_carrier == 0)) { - /* - * When carrier drops: - * - * Drop carrier on all open units. - * - * Flush queues, waking up any task waiting in the - * line discipline. - * - * Send a hangup to the control terminal. - * - * Enable all select calls. - */ - if (waitqueue_active(&(ch->ch_flags_wait))) - wake_up_interruptible(&ch->ch_flags_wait); - } - - /* - * Make sure that our cached values reflect the current reality. - */ - if (virt_carrier == 1) - ch->ch_flags |= CH_FCAR; - else - ch->ch_flags &= ~CH_FCAR; - - if (phys_carrier == 1) - ch->ch_flags |= CH_CD; - else - ch->ch_flags &= ~CH_CD; -} - - -void jsm_check_queue_flow_control(struct jsm_channel *ch) -{ - struct board_ops *bd_ops = ch->ch_bd->bd_ops; - int qleft; - - /* Store how much space we have left in the queue */ - if ((qleft = ch->ch_r_tail - ch->ch_r_head - 1) < 0) - qleft += RQUEUEMASK + 1; - - /* - * Check to see if we should enforce flow control on our queue because - * the ld (or user) isn't reading data out of our queue fast enuf. - * - * NOTE: This is done based on what the current flow control of the - * port is set for. - * - * 1) HWFLOW (RTS) - Turn off the UART's Receive interrupt. - * This will cause the UART's FIFO to back up, and force - * the RTS signal to be dropped. - * 2) SWFLOW (IXOFF) - Keep trying to send a stop character to - * the other side, in hopes it will stop sending data to us. - * 3) NONE - Nothing we can do. We will simply drop any extra data - * that gets sent into us when the queue fills up. - */ - if (qleft < 256) { - /* HWFLOW */ - if (ch->ch_c_cflag & CRTSCTS) { - if(!(ch->ch_flags & CH_RECEIVER_OFF)) { - bd_ops->disable_receiver(ch); - ch->ch_flags |= (CH_RECEIVER_OFF); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Internal queue hit hilevel mark (%d)! Turning off interrupts.\n", - qleft); - } - } - /* SWFLOW */ - else if (ch->ch_c_iflag & IXOFF) { - if (ch->ch_stops_sent <= MAX_STOPS_SENT) { - bd_ops->send_stop_character(ch); - ch->ch_stops_sent++; - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Sending stop char! Times sent: %x\n", ch->ch_stops_sent); - } - } - } - - /* - * Check to see if we should unenforce flow control because - * ld (or user) finally read enuf data out of our queue. - * - * NOTE: This is done based on what the current flow control of the - * port is set for. - * - * 1) HWFLOW (RTS) - Turn back on the UART's Receive interrupt. - * This will cause the UART's FIFO to raise RTS back up, - * which will allow the other side to start sending data again. - * 2) SWFLOW (IXOFF) - Send a start character to - * the other side, so it will start sending data to us again. - * 3) NONE - Do nothing. Since we didn't do anything to turn off the - * other side, we don't need to do anything now. - */ - if (qleft > (RQUEUESIZE / 2)) { - /* HWFLOW */ - if (ch->ch_c_cflag & CRTSCTS) { - if (ch->ch_flags & CH_RECEIVER_OFF) { - bd_ops->enable_receiver(ch); - ch->ch_flags &= ~(CH_RECEIVER_OFF); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Internal queue hit lowlevel mark (%d)! Turning on interrupts.\n", - qleft); - } - } - /* SWFLOW */ - else if (ch->ch_c_iflag & IXOFF && ch->ch_stops_sent) { - ch->ch_stops_sent = 0; - bd_ops->send_start_character(ch); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "Sending start char!\n"); - } - } -} - -/* - * jsm_tty_write() - * - * Take data from the user or kernel and send it out to the FEP. - * In here exists all the Transparent Print magic as well. - */ -int jsm_tty_write(struct uart_port *port) -{ - int bufcount; - int data_count = 0,data_count1 =0; - u16 head; - u16 tail; - u16 tmask; - u32 remain; - int temp_tail = port->state->xmit.tail; - struct jsm_channel *channel = (struct jsm_channel *)port; - - tmask = WQUEUEMASK; - head = (channel->ch_w_head) & tmask; - tail = (channel->ch_w_tail) & tmask; - - if ((bufcount = tail - head - 1) < 0) - bufcount += WQUEUESIZE; - - bufcount = min(bufcount, 56); - remain = WQUEUESIZE - head; - - data_count = 0; - if (bufcount >= remain) { - bufcount -= remain; - while ((port->state->xmit.head != temp_tail) && - (data_count < remain)) { - channel->ch_wqueue[head++] = - port->state->xmit.buf[temp_tail]; - - temp_tail++; - temp_tail &= (UART_XMIT_SIZE - 1); - data_count++; - } - if (data_count == remain) head = 0; - } - - data_count1 = 0; - if (bufcount > 0) { - remain = bufcount; - while ((port->state->xmit.head != temp_tail) && - (data_count1 < remain)) { - channel->ch_wqueue[head++] = - port->state->xmit.buf[temp_tail]; - - temp_tail++; - temp_tail &= (UART_XMIT_SIZE - 1); - data_count1++; - - } - } - - port->state->xmit.tail = temp_tail; - - data_count += data_count1; - if (data_count) { - head &= tmask; - channel->ch_w_head = head; - } - - if (data_count) { - channel->ch_bd->bd_ops->copy_data_from_queue_to_uart(channel); - } - - return data_count; -} |