mxser.c
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上传日期:2013-02-24
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- /*****************************************************************************/
- /*
- * mxser.c -- MOXA Smartio family multiport serial driver.
- *
- * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
- *
- * This code is loosely based on the Linux serial driver, written by
- * Linus Torvalds, Theodore T'so and others.
- *
- * 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 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /*
- * MOXA Smartio Family Serial Driver
- *
- * Copyright (C) 1999,2000 Moxa Technologies Co., LTD.
- *
- * for : LINUX 2.0.X, 2.2.X, 2.4.X
- * date : 2001/05/01
- * version : 1.2
- *
- * Fixes for C104H/PCI by Tim Hockin <thockin@sun.com>
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/errno.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/tty.h>
- #include <linux/tty_flip.h>
- #include <linux/serial.h>
- #include <linux/serial_reg.h>
- #include <linux/major.h>
- #include <linux/string.h>
- #include <linux/fcntl.h>
- #include <linux/ptrace.h>
- #include <linux/ioport.h>
- #include <linux/mm.h>
- #include <linux/smp_lock.h>
- #include <linux/pci.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/segment.h>
- #include <asm/bitops.h>
- #include <asm/uaccess.h>
- #define MXSER_VERSION "1.2"
- #define MXSERMAJOR 174
- #define MXSERCUMAJOR 175
- #define MXSER_EVENT_TXLOW 1
- #define MXSER_EVENT_HANGUP 2
- #define SERIAL_DO_RESTART
- #define MXSER_BOARDS 4 /* Max. boards */
- #define MXSER_PORTS 32 /* Max. ports */
- #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
- #define MXSER_ISR_PASS_LIMIT 256
- #define MXSER_ERR_IOADDR -1
- #define MXSER_ERR_IRQ -2
- #define MXSER_ERR_IRQ_CONFLIT -3
- #define MXSER_ERR_VECTOR -4
- #define SERIAL_TYPE_NORMAL 1
- #define SERIAL_TYPE_CALLOUT 2
- #define WAKEUP_CHARS 256
- #define UART_MCR_AFE 0x20
- #define UART_LSR_SPECIAL 0x1E
- #define PORTNO(x) (MINOR((x)->device) - (x)->driver.minor_start)
- #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
- #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
- #ifndef MIN
- #define MIN(a,b) ((a) < (b) ? (a) : (b))
- #endif
- /*
- * Define the Moxa PCI vendor and device IDs.
- */
- #ifndef PCI_VENDOR_ID_MOXA
- #define PCI_VENDOR_ID_MOXA 0x1393
- #endif
- #ifndef PCI_DEVICE_ID_C168
- #define PCI_DEVICE_ID_C168 0x1680
- #endif
- #ifndef PCI_DEVICE_ID_C104
- #define PCI_DEVICE_ID_C104 0x1040
- #endif
- #define C168_ASIC_ID 1
- #define C104_ASIC_ID 2
- #define CI104J_ASIC_ID 5
- enum {
- MXSER_BOARD_C168_ISA = 0,
- MXSER_BOARD_C104_ISA,
- MXSER_BOARD_CI104J,
- MXSER_BOARD_C168_PCI,
- MXSER_BOARD_C104_PCI,
- };
- static char *mxser_brdname[] =
- {
- "C168 series",
- "C104 series",
- "CI-104J series",
- "C168H/PCI series",
- "C104H/PCI series",
- };
- static int mxser_numports[] =
- {
- 8,
- 4,
- 4,
- 8,
- 4,
- };
- /*
- * MOXA ioctls
- */
- #define MOXA 0x400
- #define MOXA_GETDATACOUNT (MOXA + 23)
- #define MOXA_GET_CONF (MOXA + 35)
- #define MOXA_DIAGNOSE (MOXA + 50)
- #define MOXA_CHKPORTENABLE (MOXA + 60)
- #define MOXA_HighSpeedOn (MOXA + 61)
- #define MOXA_GET_MAJOR (MOXA + 63)
- #define MOXA_GET_CUMAJOR (MOXA + 64)
- #define MOXA_GETMSTATUS (MOXA + 65)
- static struct pci_device_id mxser_pcibrds[] = {
- { PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- MXSER_BOARD_C168_PCI },
- { PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- MXSER_BOARD_C104_PCI },
- { 0 }
- };
- MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
- static int ioaddr[MXSER_BOARDS];
- static int ttymajor = MXSERMAJOR;
- static int calloutmajor = MXSERCUMAJOR;
- static int verbose;
- /* Variables for insmod */
- MODULE_AUTHOR("William Chen");
- MODULE_DESCRIPTION("MOXA Smartio Family Multiport Board Device Driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(ioaddr, "1-4i");
- MODULE_PARM(ttymajor, "i");
- MODULE_PARM(calloutmajor, "i");
- MODULE_PARM(verbose, "i");
- EXPORT_NO_SYMBOLS;
- struct mxser_hwconf {
- int board_type;
- int ports;
- int irq;
- int vector;
- int vector_mask;
- int uart_type;
- int ioaddr[MXSER_PORTS_PER_BOARD];
- int baud_base[MXSER_PORTS_PER_BOARD];
- struct pci_dev *pdev;
- };
- struct mxser_struct {
- int port;
- int base; /* port base address */
- int irq; /* port using irq no. */
- int vector; /* port irq vector */
- int vectormask; /* port vector mask */
- int rx_trigger; /* Rx fifo trigger level */
- int baud_base; /* max. speed */
- int flags; /* defined in tty.h */
- int type; /* UART type */
- struct tty_struct *tty;
- int read_status_mask;
- int ignore_status_mask;
- int xmit_fifo_size;
- int custom_divisor;
- int x_char; /* xon/xoff character */
- int close_delay;
- unsigned short closing_wait;
- int IER; /* Interrupt Enable Register */
- int MCR; /* Modem control register */
- unsigned long event;
- int count; /* # of fd on device */
- int blocked_open; /* # of blocked opens */
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
- unsigned char *xmit_buf;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
- struct tq_struct tqueue;
- struct termios normal_termios;
- struct termios callout_termios;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
- wait_queue_head_t delta_msr_wait;
- struct async_icount icount; /* kernel counters for the 4 input interrupts */
- };
- struct mxser_log {
- int tick;
- int rxcnt[MXSER_PORTS];
- int txcnt[MXSER_PORTS];
- };
- struct mxser_mstatus {
- tcflag_t cflag;
- int cts;
- int dsr;
- int ri;
- int dcd;
- };
- static struct mxser_mstatus GMStatus[MXSER_PORTS];
- static int mxserBoardCAP[MXSER_BOARDS] =
- {
- 0, 0, 0, 0
- /* 0x180, 0x280, 0x200, 0x320 */
- };
- static struct tty_driver mxvar_sdriver, mxvar_cdriver;
- static int mxvar_refcount;
- static struct mxser_struct mxvar_table[MXSER_PORTS];
- static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
- static struct termios *mxvar_termios[MXSER_PORTS + 1];
- static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
- static struct mxser_log mxvar_log;
- static int mxvar_diagflag;
- /*
- * mxvar_tmp_buf is used as a temporary buffer by serial_write. We need
- * to lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
- static unsigned char *mxvar_tmp_buf;
- static struct semaphore mxvar_tmp_buf_sem;
- /*
- * This is used to figure out the divisor speeds and the timeouts
- */
- static int mxvar_baud_table[] =
- {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600, 0};
- struct mxser_hwconf mxsercfg[MXSER_BOARDS];
- /*
- * static functions:
- */
- #ifdef MODULE
- int init_module(void);
- void cleanup_module(void);
- #endif
- static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
- int mxser_init(void);
- static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
- static int mxser_get_PCI_conf(struct pci_dev *, int, struct mxser_hwconf *);
- static void mxser_do_softint(void *);
- static int mxser_open(struct tty_struct *, struct file *);
- static void mxser_close(struct tty_struct *, struct file *);
- static int mxser_write(struct tty_struct *, int, const unsigned char *, int);
- static int mxser_write_room(struct tty_struct *);
- static void mxser_flush_buffer(struct tty_struct *);
- static int mxser_chars_in_buffer(struct tty_struct *);
- static void mxser_flush_chars(struct tty_struct *);
- static void mxser_put_char(struct tty_struct *, unsigned char);
- static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
- static int mxser_ioctl_special(unsigned int, unsigned long);
- static void mxser_throttle(struct tty_struct *);
- static void mxser_unthrottle(struct tty_struct *);
- static void mxser_set_termios(struct tty_struct *, struct termios *);
- static void mxser_stop(struct tty_struct *);
- static void mxser_start(struct tty_struct *);
- static void mxser_hangup(struct tty_struct *);
- static void mxser_interrupt(int, void *, struct pt_regs *);
- static inline void mxser_receive_chars(struct mxser_struct *, int *);
- static inline void mxser_transmit_chars(struct mxser_struct *);
- static inline void mxser_check_modem_status(struct mxser_struct *, int);
- static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
- static int mxser_startup(struct mxser_struct *);
- static void mxser_shutdown(struct mxser_struct *);
- static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
- static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct *);
- static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct *);
- static int mxser_get_lsr_info(struct mxser_struct *, unsigned int *);
- static void mxser_send_break(struct mxser_struct *, int);
- static int mxser_get_modem_info(struct mxser_struct *, unsigned int *);
- static int mxser_set_modem_info(struct mxser_struct *, unsigned int, unsigned int *);
- /*
- * The MOXA C168/C104 serial driver boot-time initialization code!
- */
- #ifdef MODULE
- int init_module(void)
- {
- int ret;
- if (verbose)
- printk("Loading module mxser ...n");
- ret = mxser_init();
- if (verbose)
- printk("Done.n");
- return (ret);
- }
- void cleanup_module(void)
- {
- int i, err = 0;
- if (verbose)
- printk("Unloading module mxser ...n");
- if ((err |= tty_unregister_driver(&mxvar_cdriver)))
- printk("Couldn't unregister MOXA Smartio family callout drivern");
- if ((err |= tty_unregister_driver(&mxvar_sdriver)))
- printk("Couldn't unregister MOXA Smartio family serial drivern");
- for (i = 0; i < MXSER_BOARDS; i++) {
- if (mxsercfg[i].board_type == -1)
- continue;
- else {
- free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
- }
- }
- if (verbose)
- printk("Done.n");
- }
- #endif
- int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
- {
- struct mxser_struct *info;
- unsigned long flags;
- int retval;
- int i, n;
- init_MUTEX(&mxvar_tmp_buf_sem);
-
- n = board * MXSER_PORTS_PER_BOARD;
- info = &mxvar_table[n];
- for (i = 0; i < hwconf->ports; i++, n++, info++) {
- if (verbose) {
- printk(" ttyM%d/cum%d at 0x%04x ", n, n, hwconf->ioaddr[i]);
- if (hwconf->baud_base[i] == 115200)
- printk(" max. baud rate up to 115200 bps.n");
- else
- printk(" max. baud rate up to 921600 bps.n");
- }
- info->port = n;
- info->base = hwconf->ioaddr[i];
- info->irq = hwconf->irq;
- info->vector = hwconf->vector;
- info->vectormask = hwconf->vector_mask;
- info->rx_trigger = 14;
- info->baud_base = hwconf->baud_base[i];
- info->flags = ASYNC_SHARE_IRQ;
- info->type = hwconf->uart_type;
- if ((info->type == PORT_16450) || (info->type == PORT_8250))
- info->xmit_fifo_size = 1;
- else
- info->xmit_fifo_size = 16;
- info->custom_divisor = hwconf->baud_base[i] * 16;
- info->close_delay = 5 * HZ / 10;
- info->closing_wait = 30 * HZ;
- info->tqueue.routine = mxser_do_softint;
- info->tqueue.data = info;
- info->callout_termios = mxvar_cdriver.init_termios;
- info->normal_termios = mxvar_sdriver.init_termios;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- init_waitqueue_head(&info->delta_msr_wait);
- }
- /*
- * Allocate the IRQ if necessary
- */
- save_flags(flags);
- n = board * MXSER_PORTS_PER_BOARD;
- info = &mxvar_table[n];
- cli();
- retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
- "mxser", info);
- if (retval) {
- restore_flags(flags);
- printk("Board %d: %s", board, mxser_brdname[hwconf->board_type]);
- printk(" Request irq fail,IRQ (%d) may be conflit with another device.n", info->irq);
- return (retval);
- }
- restore_flags(flags);
- return 0;
- }
- static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
- {
- mxsercfg[board] = *hwconf;
- }
- static int mxser_get_PCI_conf(struct pci_dev *pdev, int board_type, struct mxser_hwconf *hwconf)
- {
- int i;
- unsigned int ioaddress;
- hwconf->board_type = board_type;
- hwconf->ports = mxser_numports[board_type];
- ioaddress = pci_resource_start (pdev, 2);
- for (i = 0; i < hwconf->ports; i++)
- hwconf->ioaddr[i] = ioaddress + 8 * i;
- ioaddress = pci_resource_start (pdev, 3);
- hwconf->vector = ioaddress;
- hwconf->irq = pdev->irq;
- hwconf->uart_type = PORT_16550A;
- hwconf->vector_mask = 0;
- for (i = 0; i < hwconf->ports; i++) {
- hwconf->vector_mask |= (1 << i);
- hwconf->baud_base[i] = 921600;
- }
- return (0);
- }
- int mxser_init(void)
- {
- int i, m, retval, b;
- int n, index;
- int ret1, ret2;
- struct mxser_hwconf hwconf;
- printk("MOXA Smartio family driver version %sn", MXSER_VERSION);
- /* Initialize the tty_driver structure */
- memset(&mxvar_sdriver, 0, sizeof(struct tty_driver));
- mxvar_sdriver.magic = TTY_DRIVER_MAGIC;
- mxvar_sdriver.name = "ttyM";
- mxvar_sdriver.major = ttymajor;
- mxvar_sdriver.minor_start = 0;
- mxvar_sdriver.num = MXSER_PORTS + 1;
- mxvar_sdriver.type = TTY_DRIVER_TYPE_SERIAL;
- mxvar_sdriver.subtype = SERIAL_TYPE_NORMAL;
- mxvar_sdriver.init_termios = tty_std_termios;
- mxvar_sdriver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- mxvar_sdriver.flags = TTY_DRIVER_REAL_RAW;
- mxvar_sdriver.refcount = &mxvar_refcount;
- mxvar_sdriver.table = mxvar_tty;
- mxvar_sdriver.termios = mxvar_termios;
- mxvar_sdriver.termios_locked = mxvar_termios_locked;
- mxvar_sdriver.open = mxser_open;
- mxvar_sdriver.close = mxser_close;
- mxvar_sdriver.write = mxser_write;
- mxvar_sdriver.put_char = mxser_put_char;
- mxvar_sdriver.flush_chars = mxser_flush_chars;
- mxvar_sdriver.write_room = mxser_write_room;
- mxvar_sdriver.chars_in_buffer = mxser_chars_in_buffer;
- mxvar_sdriver.flush_buffer = mxser_flush_buffer;
- mxvar_sdriver.ioctl = mxser_ioctl;
- mxvar_sdriver.throttle = mxser_throttle;
- mxvar_sdriver.unthrottle = mxser_unthrottle;
- mxvar_sdriver.set_termios = mxser_set_termios;
- mxvar_sdriver.stop = mxser_stop;
- mxvar_sdriver.start = mxser_start;
- mxvar_sdriver.hangup = mxser_hangup;
- /*
- * The callout device is just like normal device except for
- * major number and the subtype code.
- */
- mxvar_cdriver = mxvar_sdriver;
- mxvar_cdriver.name = "cum";
- mxvar_cdriver.major = calloutmajor;
- mxvar_cdriver.subtype = SERIAL_TYPE_CALLOUT;
- printk("Tty devices major number = %d, callout devices major number = %dn", ttymajor, calloutmajor);
- mxvar_diagflag = 0;
- memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
- memset(&mxvar_log, 0, sizeof(struct mxser_log));
- m = 0;
- /* Start finding ISA boards here */
- for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
- int cap;
- if (!(cap = mxserBoardCAP[b]))
- continue;
- retval = mxser_get_ISA_conf(cap, &hwconf);
- if (retval != 0)
- printk("Found MOXA %s board (CAP=0x%x)n",
- mxser_brdname[hwconf.board_type],
- ioaddr[b]);
- if (retval <= 0) {
- if (retval == MXSER_ERR_IRQ)
- printk("Invalid interrupt number,board not configuredn");
- else if (retval == MXSER_ERR_IRQ_CONFLIT)
- printk("Invalid interrupt number,board not configuredn");
- else if (retval == MXSER_ERR_VECTOR)
- printk("Invalid interrupt vector,board not configuredn");
- else if (retval == MXSER_ERR_IOADDR)
- printk("Invalid I/O address,board not configuredn");
- continue;
- }
- hwconf.pdev = NULL;
- if (mxser_initbrd(m, &hwconf) < 0)
- continue;
- mxser_getcfg(m, &hwconf);
- m++;
- }
- /* Start finding ISA boards from module arg */
- for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
- int cap;
- if (!(cap = ioaddr[b]))
- continue;
- retval = mxser_get_ISA_conf(cap, &hwconf);
- if (retval != 0)
- printk("Found MOXA %s board (CAP=0x%x)n",
- mxser_brdname[hwconf.board_type],
- ioaddr[b]);
- if (retval <= 0) {
- if (retval == MXSER_ERR_IRQ)
- printk("Invalid interrupt number,board not configuredn");
- else if (retval == MXSER_ERR_IRQ_CONFLIT)
- printk("Invalid interrupt number,board not configuredn");
- else if (retval == MXSER_ERR_VECTOR)
- printk("Invalid interrupt vector,board not configuredn");
- else if (retval == MXSER_ERR_IOADDR)
- printk("Invalid I/O address,board not configuredn");
- continue;
- }
- hwconf.pdev = NULL;
- if (mxser_initbrd(m, &hwconf) < 0)
- continue;
- mxser_getcfg(m, &hwconf);
- m++;
- }
- /* start finding PCI board here */
- #ifdef CONFIG_PCI
- {
- struct pci_dev *pdev = NULL;
- n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
- index = 0;
- for (b = 0; b < n; b++) {
- while (pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev))
- {
- if (pci_enable_device(pdev))
- continue;
- hwconf.pdev = pdev;
- printk("Found MOXA %s board(BusNo=%d,DevNo=%d)n",
- mxser_brdname[mxser_pcibrds[b].driver_data],
- pdev->bus->number, PCI_SLOT(pdev->devfn));
- if (m >= MXSER_BOARDS) {
- printk("Too many Smartio family boards found (maximum %d),board not configuredn", MXSER_BOARDS);
- } else {
- retval = mxser_get_PCI_conf(pdev, mxser_pcibrds[b].driver_data, &hwconf);
- if (retval < 0) {
- if (retval == MXSER_ERR_IRQ)
- printk("Invalid interrupt number,board not configuredn");
- else if (retval == MXSER_ERR_IRQ_CONFLIT)
- printk("Invalid interrupt number,board not configuredn");
- else if (retval == MXSER_ERR_VECTOR)
- printk("Invalid interrupt vector,board not configuredn");
- else if (retval == MXSER_ERR_IOADDR)
- printk("Invalid I/O address,board not configuredn");
- continue;
- }
- if (mxser_initbrd(m, &hwconf) < 0)
- continue;
- mxser_getcfg(m, &hwconf);
- m++;
- }
- }
- }
- }
- #endif
- for (i = m; i < MXSER_BOARDS; i++) {
- mxsercfg[i].board_type = -1;
- }
- ret1 = 0;
- ret2 = 0;
- if (!(ret1 = tty_register_driver(&mxvar_sdriver))) {
- if (!(ret2 = tty_register_driver(&mxvar_cdriver))) {
- return 0;
- } else {
- tty_unregister_driver(&mxvar_sdriver);
- printk("Couldn't install MOXA Smartio family callout driver !n");
- }
- } else
- printk("Couldn't install MOXA Smartio family driver !n");
- if (ret1 || ret2) {
- for (i = 0; i < MXSER_BOARDS; i++) {
- if (mxsercfg[i].board_type == -1)
- continue;
- else {
- free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
- }
- }
- return -1;
- }
- return (0);
- }
- static void mxser_do_softint(void *private_)
- {
- struct mxser_struct *info = (struct mxser_struct *) private_;
- struct tty_struct *tty;
- tty = info->tty;
- if (tty) {
- if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event)) {
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup) (tty);
- wake_up_interruptible(&tty->write_wait);
- }
- if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event)) {
- tty_hangup(tty); /* FIXME: module removal race here - AKPM */
- }
- }
- MOD_DEC_USE_COUNT;
- }
- /*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
- static int mxser_open(struct tty_struct *tty, struct file *filp)
- {
- struct mxser_struct *info;
- int retval, line;
- unsigned long page;
- line = PORTNO(tty);
- if (line == MXSER_PORTS)
- return (0);
- if ((line < 0) || (line > MXSER_PORTS))
- return (-ENODEV);
- info = mxvar_table + line;
- if (!info->base)
- return (-ENODEV);
- info->count++;
- tty->driver_data = info;
- info->tty = tty;
- if (!mxvar_tmp_buf) {
- page = get_free_page(GFP_KERNEL);
- if (!page)
- return (-ENOMEM);
- if (mxvar_tmp_buf)
- free_page(page);
- else
- mxvar_tmp_buf = (unsigned char *) page;
- }
- /*
- * Start up serial port
- */
- retval = mxser_startup(info);
- if (retval)
- return (retval);
- retval = mxser_block_til_ready(tty, filp, info);
- if (retval)
- return (retval);
- if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
- if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
- *tty->termios = info->normal_termios;
- else
- *tty->termios = info->callout_termios;
- mxser_change_speed(info, 0);
- }
- info->session = current->session;
- info->pgrp = current->pgrp;
- MOD_INC_USE_COUNT;
- return (0);
- }
- /*
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- */
- static void mxser_close(struct tty_struct *tty, struct file *filp)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- unsigned long timeout;
- if (PORTNO(tty) == MXSER_PORTS)
- return;
- if (!info)
- return;
- save_flags(flags);
- cli();
- if (tty_hung_up_p(filp)) {
- restore_flags(flags);
- MOD_DEC_USE_COUNT;
- return;
- }
- if ((tty->count == 1) && (info->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. Info->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk("mxser_close: bad serial port count; tty->count is 1, "
- "info->count is %dn", info->count);
- info->count = 1;
- }
- if (--info->count < 0) {
- printk("mxser_close: bad serial port count for ttys%d: %dn",
- info->port, info->count);
- info->count = 0;
- }
- if (info->count) {
- restore_flags(flags);
- MOD_DEC_USE_COUNT;
- return;
- }
- info->flags |= ASYNC_CLOSING;
- /*
- * Save the termios structure, since this port may have
- * separate termios for callout and dialin.
- */
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- info->normal_termios = *tty->termios;
- if (info->flags & ASYNC_CALLOUT_ACTIVE)
- info->callout_termios = *tty->termios;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->IER &= ~UART_IER_RLSI;
- /* by William
- info->read_status_mask &= ~UART_LSR_DR;
- */
- if (info->flags & ASYNC_INITIALIZED) {
- outb(info->IER, info->base + UART_IER);
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- timeout = jiffies + HZ;
- while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(5);
- if (jiffies > timeout)
- break;
- }
- }
- mxser_shutdown(info);
- if (tty->driver.flush_buffer)
- tty->driver.flush_buffer(tty);
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
- tty->closing = 0;
- info->event = 0;
- info->tty = 0;
- if (info->blocked_open) {
- if (info->close_delay) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(info->close_delay);
- }
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE |
- ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
- restore_flags(flags);
- MOD_DEC_USE_COUNT;
- }
- static int mxser_write(struct tty_struct *tty, int from_user,
- const unsigned char *buf, int count)
- {
- int c, total = 0;
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- if (!tty || !info->xmit_buf || !mxvar_tmp_buf)
- return (0);
- save_flags(flags);
- if (from_user) {
- down(&mxvar_tmp_buf_sem);
- while (1) {
- c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0)
- break;
- c -= copy_from_user(mxvar_tmp_buf, buf, c);
- if (!c) {
- if (!total)
- total = -EFAULT;
- break;
- }
- cli();
- c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- memcpy(info->xmit_buf + info->xmit_head, mxvar_tmp_buf, c);
- info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
- info->xmit_cnt += c;
- restore_flags(flags);
- buf += c;
- count -= c;
- total += c;
- }
- up(&mxvar_tmp_buf_sem);
- } else {
- while (1) {
- cli();
- c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0) {
- restore_flags(flags);
- break;
- }
- memcpy(info->xmit_buf + info->xmit_head, buf, c);
- info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
- info->xmit_cnt += c;
- restore_flags(flags);
- buf += c;
- count -= c;
- total += c;
- }
- }
- cli();
- if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
- !(info->IER & UART_IER_THRI)) {
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- }
- restore_flags(flags);
- return (total);
- }
- static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- if (!tty || !info->xmit_buf)
- return;
- save_flags(flags);
- cli();
- if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
- restore_flags(flags);
- return;
- }
- info->xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= SERIAL_XMIT_SIZE - 1;
- info->xmit_cnt++;
- /********************************************** why ??? ***********
- if ( !tty->stopped && !tty->hw_stopped &&
- !(info->IER & UART_IER_THRI) ) {
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- }
- *****************************************************************/
- restore_flags(flags);
- }
- static void mxser_flush_chars(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
- !info->xmit_buf)
- return;
- save_flags(flags);
- cli();
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- restore_flags(flags);
- }
- static int mxser_write_room(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- int ret;
- ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
- if (ret < 0)
- ret = 0;
- return (ret);
- }
- static int mxser_chars_in_buffer(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- return (info->xmit_cnt);
- }
- static void mxser_flush_buffer(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- save_flags(flags);
- cli();
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- restore_flags(flags);
- wake_up_interruptible(&tty->write_wait);
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup) (tty);
- }
- static int mxser_ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- unsigned long flags;
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- int retval;
- struct async_icount cprev, cnow; /* kernel counter temps */
- struct serial_icounter_struct *p_cuser; /* user space */
- unsigned long templ;
- if (PORTNO(tty) == MXSER_PORTS)
- return (mxser_ioctl_special(cmd, arg));
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) &&
- (cmd != TIOCGICOUNT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return (-EIO);
- }
- switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return (retval);
- tty_wait_until_sent(tty, 0);
- if (!arg)
- mxser_send_break(info, HZ / 4); /* 1/4 second */
- return (0);
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return (retval);
- tty_wait_until_sent(tty, 0);
- mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
- return (0);
- case TIOCGSOFTCAR:
- return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg);
- case TIOCSSOFTCAR:
- if(get_user(templ, (unsigned long *) arg))
- return -EFAULT;
- arg = templ;
- tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- return (0);
- case TIOCMGET:
- return (mxser_get_modem_info(info, (unsigned int *) arg));
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- return (mxser_set_modem_info(info, cmd, (unsigned int *) arg));
- case TIOCGSERIAL:
- return (mxser_get_serial_info(info, (struct serial_struct *) arg));
- case TIOCSSERIAL:
- return (mxser_set_serial_info(info, (struct serial_struct *) arg));
- case TIOCSERGETLSR: /* Get line status register */
- return (mxser_get_lsr_info(info, (unsigned int *) arg));
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- save_flags(flags);
- cli();
- cprev = info->icount; /* note the counters on entry */
- restore_flags(flags);
- while (1) {
- interruptible_sleep_on(&info->delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return (-ERESTARTSYS);
- save_flags(flags);
- cli();
- cnow = info->icount; /* atomic copy */
- restore_flags(flags);
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
- return (-EIO); /* no change => error */
- if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
- return (0);
- }
- cprev = cnow;
- }
- /* NOTREACHED */
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- case TIOCGICOUNT:
- save_flags(flags);
- cli();
- cnow = info->icount;
- restore_flags(flags);
- p_cuser = (struct serial_icounter_struct *) arg;
- if(put_user(cnow.cts, &p_cuser->cts))
- return -EFAULT;
- if(put_user(cnow.dsr, &p_cuser->dsr))
- return -EFAULT;
- if(put_user(cnow.rng, &p_cuser->rng))
- return -EFAULT;
- return put_user(cnow.dcd, &p_cuser->dcd);
- case MOXA_HighSpeedOn:
- return put_user(info->baud_base != 115200 ? 1 : 0, (int *) arg);
- default:
- return (-ENOIOCTLCMD);
- }
- return (0);
- }
- static int mxser_ioctl_special(unsigned int cmd, unsigned long arg)
- {
- int i, result, status;
- switch (cmd) {
- case MOXA_GET_CONF:
- if(copy_to_user((struct mxser_hwconf *) arg, mxsercfg,
- sizeof(struct mxser_hwconf) * 4))
- return -EFAULT;
- return 0;
- case MOXA_GET_MAJOR:
- if(copy_to_user((int *) arg, &ttymajor, sizeof(int)))
- return -EFAULT;
- return 0;
- case MOXA_GET_CUMAJOR:
- if(copy_to_user((int *) arg, &calloutmajor, sizeof(int)))
- return -EFAULT;
- return 0;
- case MOXA_CHKPORTENABLE:
- result = 0;
- for (i = 0; i < MXSER_PORTS; i++) {
- if (mxvar_table[i].base)
- result |= (1 << i);
- }
- return put_user(result, (unsigned long *) arg);
- case MOXA_GETDATACOUNT:
- if(copy_to_user((struct mxser_log *) arg, &mxvar_log, sizeof(mxvar_log)))
- return -EFAULT;
- return (0);
- case MOXA_GETMSTATUS:
- for (i = 0; i < MXSER_PORTS; i++) {
- GMStatus[i].ri = 0;
- if (!mxvar_table[i].base) {
- GMStatus[i].dcd = 0;
- GMStatus[i].dsr = 0;
- GMStatus[i].cts = 0;
- continue;
- }
- if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
- GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
- else
- GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
- status = inb(mxvar_table[i].base + UART_MSR);
- if (status & 0x80 /*UART_MSR_DCD */ )
- GMStatus[i].dcd = 1;
- else
- GMStatus[i].dcd = 0;
- if (status & 0x20 /*UART_MSR_DSR */ )
- GMStatus[i].dsr = 1;
- else
- GMStatus[i].dsr = 0;
- if (status & 0x10 /*UART_MSR_CTS */ )
- GMStatus[i].cts = 1;
- else
- GMStatus[i].cts = 0;
- }
- if(copy_to_user((struct mxser_mstatus *) arg, GMStatus,
- sizeof(struct mxser_mstatus) * MXSER_PORTS))
- return -EFAULT;
- return 0;
- default:
- return (-ENOIOCTLCMD);
- }
- return (0);
- }
- /*
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- */
- static void mxser_throttle(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- if (I_IXOFF(tty)) {
- info->x_char = STOP_CHAR(tty);
- save_flags(flags);
- cli();
- outb(info->IER, 0);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
- restore_flags(flags);
- }
- if (info->tty->termios->c_cflag & CRTSCTS) {
- info->MCR &= ~UART_MCR_RTS;
- save_flags(flags);
- cli();
- outb(info->MCR, info->base + UART_MCR);
- restore_flags(flags);
- }
- }
- static void mxser_unthrottle(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else {
- info->x_char = START_CHAR(tty);
- save_flags(flags);
- cli();
- outb(info->IER, 0);
- info->IER |= UART_IER_THRI; /* force Tx interrupt */
- outb(info->IER, info->base + UART_IER);
- restore_flags(flags);
- }
- }
- if (info->tty->termios->c_cflag & CRTSCTS) {
- info->MCR |= UART_MCR_RTS;
- save_flags(flags);
- cli();
- outb(info->MCR, info->base + UART_MCR);
- restore_flags(flags);
- }
- }
- static void mxser_set_termios(struct tty_struct *tty,
- struct termios *old_termios)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- /* 8-2-99 by William
- if ( (tty->termios->c_cflag == old_termios->c_cflag) &&
- (RELEVANT_IFLAG(tty->termios->c_iflag) ==
- RELEVANT_IFLAG(old_termios->c_iflag)) )
- return;
- mxser_change_speed(info, old_termios);
- if ( (old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS) ) {
- tty->hw_stopped = 0;
- mxser_start(tty);
- }
- */
- if ((tty->termios->c_cflag != old_termios->c_cflag) ||
- (RELEVANT_IFLAG(tty->termios->c_iflag) !=
- RELEVANT_IFLAG(old_termios->c_iflag))) {
- mxser_change_speed(info, old_termios);
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- mxser_start(tty);
- }
- }
- /* Handle sw stopped */
- if ((old_termios->c_iflag & IXON) &&
- !(tty->termios->c_iflag & IXON)) {
- tty->stopped = 0;
- mxser_start(tty);
- }
- }
- /*
- * mxser_stop() and mxser_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- */
- static void mxser_stop(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- save_flags(flags);
- cli();
- if (info->IER & UART_IER_THRI) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- }
- restore_flags(flags);
- }
- static void mxser_start(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- unsigned long flags;
- save_flags(flags);
- cli();
- if (info->xmit_cnt && info->xmit_buf &&
- !(info->IER & UART_IER_THRI)) {
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- }
- restore_flags(flags);
- }
- /*
- * This routine is called by tty_hangup() when a hangup is signaled.
- */
- void mxser_hangup(struct tty_struct *tty)
- {
- struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
- mxser_flush_buffer(tty);
- mxser_shutdown(info);
- info->event = 0;
- info->count = 0;
- info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
- info->tty = 0;
- wake_up_interruptible(&info->open_wait);
- }
- /*
- * This is the serial driver's generic interrupt routine
- */
- static void mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- int status, i;
- struct mxser_struct *info;
- struct mxser_struct *port;
- int max, irqbits, bits, msr;
- int pass_counter = 0;
- port = 0;
- for (i = 0; i < MXSER_BOARDS; i++) {
- if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
- port = dev_id;
- break;
- }
- }
- if (i == MXSER_BOARDS)
- return;
- if (port == 0)
- return;
- max = mxser_numports[mxsercfg[i].board_type];
- while (1) {
- irqbits = inb(port->vector) & port->vectormask;
- if (irqbits == port->vectormask)
- break;
- for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
- if (irqbits == port->vectormask)
- break;
- if (bits & irqbits)
- continue;
- info = port + i;
- if (!info->tty ||
- (inb(info->base + UART_IIR) & UART_IIR_NO_INT))
- continue;
- status = inb(info->base + UART_LSR) & info->read_status_mask;
- if (status & UART_LSR_DR)
- mxser_receive_chars(info, &status);
- msr = inb(info->base + UART_MSR);
- if (msr & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(info, msr);
- if (status & UART_LSR_THRE) {
- /* 8-2-99 by William
- if ( info->x_char || (info->xmit_cnt > 0) )
- */
- mxser_transmit_chars(info);
- }
- }
- if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
- #if 0
- printk("MOXA Smartio/Indusrtio family driver interrupt loop breakn");
- #endif
- break; /* Prevent infinite loops */
- }
- }
- }
- static inline void mxser_receive_chars(struct mxser_struct *info,
- int *status)
- {
- struct tty_struct *tty = info->tty;
- unsigned char ch;
- int ignored = 0;
- int cnt = 0;
- do {
- ch = inb(info->base + UART_RX);
- if (*status & info->ignore_status_mask) {
- if (++ignored > 100)
- break;
- } else {
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- break;
- tty->flip.count++;
- if (*status & UART_LSR_SPECIAL) {
- if (*status & UART_LSR_BI) {
- *tty->flip.flag_buf_ptr++ = TTY_BREAK;
- if (info->flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (*status & UART_LSR_PE) {
- *tty->flip.flag_buf_ptr++ = TTY_PARITY;
- } else if (*status & UART_LSR_FE) {
- *tty->flip.flag_buf_ptr++ = TTY_FRAME;
- } else if (*status & UART_LSR_OE) {
- *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
- } else
- *tty->flip.flag_buf_ptr++ = 0;
- } else
- *tty->flip.flag_buf_ptr++ = 0;
- *tty->flip.char_buf_ptr++ = ch;
- cnt++;
- }
- *status = inb(info->base + UART_LSR) & info->read_status_mask;
- } while (*status & UART_LSR_DR);
- mxvar_log.rxcnt[info->port] += cnt;
- queue_task(&tty->flip.tqueue, &tq_timer);
- }
- static inline void mxser_transmit_chars(struct mxser_struct *info)
- {
- int count, cnt;
- if (info->x_char) {
- outb(info->x_char, info->base + UART_TX);
- info->x_char = 0;
- mxvar_log.txcnt[info->port]++;
- return;
- }
- if ((info->xmit_cnt <= 0) || info->tty->stopped ||
- info->tty->hw_stopped) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- return;
- }
- cnt = info->xmit_cnt;
- count = info->xmit_fifo_size;
- do {
- outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
- if (--info->xmit_cnt <= 0)
- break;
- } while (--count > 0);
- mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
- if (info->xmit_cnt < WAKEUP_CHARS) {
- set_bit(MXSER_EVENT_TXLOW, &info->event);
- MOD_INC_USE_COUNT;
- if (schedule_task(&info->tqueue) == 0)
- MOD_DEC_USE_COUNT;
- }
- if (info->xmit_cnt <= 0) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- }
- }
- static inline void mxser_check_modem_status(struct mxser_struct *info,
- int status)
- {
- /* update input line counters */
- if (status & UART_MSR_TERI)
- info->icount.rng++;
- if (status & UART_MSR_DDSR)
- info->icount.dsr++;
- if (status & UART_MSR_DDCD)
- info->icount.dcd++;
- if (status & UART_MSR_DCTS)
- info->icount.cts++;
- wake_up_interruptible(&info->delta_msr_wait);
- if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
- if (status & UART_MSR_DCD)
- wake_up_interruptible(&info->open_wait);
- else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_CALLOUT_NOHUP)))
- set_bit(MXSER_EVENT_HANGUP, &info->event);
- MOD_INC_USE_COUNT;
- if (schedule_task(&info->tqueue) == 0)
- MOD_DEC_USE_COUNT;
- }
- if (info->flags & ASYNC_CTS_FLOW) {
- if (info->tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- info->tty->hw_stopped = 0;
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- set_bit(MXSER_EVENT_TXLOW, &info->event);
- MOD_INC_USE_COUNT;
- if (schedule_task(&info->tqueue) == 0)
- MOD_DEC_USE_COUNT;
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- info->tty->hw_stopped = 1;
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->base + UART_IER);
- }
- }
- }
- }
- static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
- struct mxser_struct *info)
- {
- DECLARE_WAITQUEUE(wait, current);
- unsigned long flags;
- int retval;
- int do_clocal = 0;
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
- #ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- return (-EAGAIN);
- else
- return (-ERESTARTSYS);
- #else
- return (-EAGAIN);
- #endif
- }
- /*
- * If this is a callout device, then just make sure the normal
- * device isn't being used.
- */
- if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- return (-EBUSY);
- if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_SESSION_LOCKOUT) &&
- (info->session != current->session))
- return (-EBUSY);
- if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_PGRP_LOCKOUT) &&
- (info->pgrp != current->pgrp))
- return (-EBUSY);
- info->flags |= ASYNC_CALLOUT_ACTIVE;
- return (0);
- }
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
- if (info->flags & ASYNC_CALLOUT_ACTIVE)
- return (-EBUSY);
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return (0);
- }
- if (info->flags & ASYNC_CALLOUT_ACTIVE) {
- if (info->normal_termios.c_cflag & CLOCAL)
- do_clocal = 1;
- } else {
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
- }
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * mxser_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&info->open_wait, &wait);
- save_flags(flags);
- cli();
- if (!tty_hung_up_p(filp))
- info->count--;
- restore_flags(flags);
- info->blocked_open++;
- while (1) {
- save_flags(flags);
- cli();
- if (!(info->flags & ASYNC_CALLOUT_ACTIVE))
- outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS,
- info->base + UART_MCR);
- restore_flags(flags);
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
- #ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
- #else
- retval = -EAGAIN;
- #endif
- break;
- }
- if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- !(info->flags & ASYNC_CLOSING) &&
- (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
- schedule();
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&info->open_wait, &wait);
- if (!tty_hung_up_p(filp))
- info->count++;
- info->blocked_open--;
- if (retval)
- return (retval);
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return (0);
- }
- static int mxser_startup(struct mxser_struct *info)
- {
- unsigned long flags;
- unsigned long page;
- page = get_free_page(GFP_KERNEL);
- if (!page)
- return (-ENOMEM);
- save_flags(flags);
- cli();
- if (info->flags & ASYNC_INITIALIZED) {
- free_page(page);
- restore_flags(flags);
- return (0);
- }
- if (!info->base || !info->type) {
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- free_page(page);
- restore_flags(flags);
- return (0);
- }
- if (info->xmit_buf)
- free_page(page);
- else
- info->xmit_buf = (unsigned char *) page;
- /*
- * Clear the FIFO buffers and disable them
- * (they will be reenabled in mxser_change_speed())
- */
- if (info->xmit_fifo_size == 16)
- outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
- info->base + UART_FCR);
- /*
- * At this point there's no way the LSR could still be 0xFF;
- * if it is, then bail out, because there's likely no UART
- * here.
- */
- if (inb(info->base + UART_LSR) == 0xff) {
- restore_flags(flags);
- if (capable(CAP_SYS_ADMIN)) {
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- return (0);
- } else
- return (-ENODEV);
- }
- /*
- * Clear the interrupt registers.
- */
- (void) inb(info->base + UART_LSR);
- (void) inb(info->base + UART_RX);
- (void) inb(info->base + UART_IIR);
- (void) inb(info->base + UART_MSR);
- /*
- * Now, initialize the UART
- */
- outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
- info->MCR = UART_MCR_DTR | UART_MCR_RTS;
- outb(info->MCR, info->base + UART_MCR);
- /*
- * Finally, enable interrupts
- */
- info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
- outb(info->IER, info->base + UART_IER); /* enable interrupts */
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) inb(info->base + UART_LSR);
- (void) inb(info->base + UART_RX);
- (void) inb(info->base + UART_IIR);
- (void) inb(info->base + UART_MSR);
- if (info->tty)
- test_and_clear_bit(TTY_IO_ERROR, &info->tty->flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- /*
- * and set the speed of the serial port
- */
- mxser_change_speed(info, 0);
- info->flags |= ASYNC_INITIALIZED;
- restore_flags(flags);
- return (0);
- }
- /*
- * This routine will shutdown a serial port; interrupts maybe disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
- static void mxser_shutdown(struct mxser_struct *info)
- {
- unsigned long flags;
- if (!(info->flags & ASYNC_INITIALIZED))
- return;
- save_flags(flags);
- cli(); /* Disable interrupts */
- /*
- * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
- * here so the queue might never be waken up
- */
- wake_up_interruptible(&info->delta_msr_wait);
- /*
- * Free the IRQ, if necessary
- */
- if (info->xmit_buf) {
- free_page((unsigned long) info->xmit_buf);
- info->xmit_buf = 0;
- }
- info->IER = 0;
- outb(0x00, info->base + UART_IER); /* disable all intrs */
- if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
- info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
- outb(info->MCR, info->base + UART_MCR);
- /* clear Rx/Tx FIFO's */
- outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
- /* read data port to reset things */
- (void) inb(info->base + UART_RX);
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- info->flags &= ~ASYNC_INITIALIZED;
- restore_flags(flags);
- }
- /*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
- static int mxser_change_speed(struct mxser_struct *info,
- struct termios *old_termios)
- {
- int quot = 0;
- unsigned cflag, cval, fcr;
- int i;
- int ret = 0;
- unsigned long flags;
- if (!info->tty || !info->tty->termios)
- return ret;
- cflag = info->tty->termios->c_cflag;
- if (!(info->base))
- return ret;
- #ifndef B921600
- #define B921600 (B460800 +1)
- #endif
- switch (cflag & (CBAUD | CBAUDEX)) {
- case B921600:
- i = 20;
- break;
- case B460800:
- i = 19;
- break;
- case B230400:
- i = 18;
- break;
- case B115200:
- i = 17;
- break;
- case B57600:
- i = 16;
- break;
- case B38400:
- i = 15;
- break;
- case B19200:
- i = 14;
- break;
- case B9600:
- i = 13;
- break;
- case B4800:
- i = 12;
- break;
- case B2400:
- i = 11;
- break;
- case B1800:
- i = 10;
- break;
- case B1200:
- i = 9;
- break;
- case B600:
- i = 8;
- break;
- case B300:
- i = 7;
- break;
- case B200:
- i = 6;
- break;
- case B150:
- i = 5;
- break;
- case B134:
- i = 4;
- break;
- case B110:
- i = 3;
- break;
- case B75:
- i = 2;
- break;
- case B50:
- i = 1;
- break;
- default:
- i = 0;
- break;
- }
- if (i == 15) {
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- i = 16; /* 57600 bps */
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- i = 17; /* 115200 bps */
- #ifdef ASYNC_SPD_SHI
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- i = 18;
- #endif
- #ifdef ASYNC_SPD_WARP
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- i = 19;
- #endif
- }
- if (mxvar_baud_table[i] == 134) {
- quot = (2 * info->baud_base / 269);
- } else if (mxvar_baud_table[i]) {
- quot = info->baud_base / mxvar_baud_table[i];
- if (!quot && old_termios) {
- /* re-calculate */
- info->tty->termios->c_cflag &= ~CBAUD;
- info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
- switch (info->tty->termios->c_cflag & (CBAUD | CBAUDEX)) {
- case B921600:
- i = 20;
- break;
- case B460800:
- i = 19;
- break;
- case B230400:
- i = 18;
- break;
- case B115200:
- i = 17;
- break;
- case B57600:
- i = 16;
- break;
- case B38400:
- i = 15;
- break;
- case B19200:
- i = 14;
- break;
- case B9600:
- i = 13;
- break;
- case B4800:
- i = 12;
- break;
- case B2400:
- i = 11;
- break;
- case B1800:
- i = 10;
- break;
- case B1200:
- i = 9;
- break;
- case B600:
- i = 8;
- break;
- case B300:
- i = 7;
- break;
- case B200:
- i = 6;
- break;
- case B150:
- i = 5;
- break;
- case B134:
- i = 4;
- break;
- case B110:
- i = 3;
- break;
- case B75:
- i = 2;
- break;
- case B50:
- i = 1;
- break;
- default:
- i = 0;
- break;
- }
- if (i == 15) {
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- i = 16; /* 57600 bps */
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- i = 17; /* 115200 bps */
- #ifdef ASYNC_SPD_SHI
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- i = 18;
- #endif
- #ifdef ASYNC_SPD_WARP
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- i = 19;
- #endif
- }
- if (mxvar_baud_table[i] == 134) {
- quot = (2 * info->baud_base / 269);
- } else if (mxvar_baud_table[i]) {
- quot = info->baud_base / mxvar_baud_table[i];
- if (quot == 0)
- quot = 1;
- } else {
- quot = 0;
- }
- } else if (quot == 0)
- quot = 1;
- } else {
- quot = 0;
- }
- if (quot) {
- info->MCR |= UART_MCR_DTR;
- save_flags(flags);
- cli();
- outb(info->MCR, info->base + UART_MCR);
- restore_flags(flags);
- } else {
- info->MCR &= ~UART_MCR_DTR;
- save_flags(flags);
- cli();
- outb(info->MCR, info->base + UART_MCR);
- restore_flags(flags);
- return ret;
- }
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5:
- cval = 0x00;
- break;
- case CS6:
- cval = 0x01;
- break;
- case CS7:
- cval = 0x02;
- break;
- case CS8:
- cval = 0x03;
- break;
- default:
- cval = 0x00;
- break; /* too keep GCC shut... */
- }
- if (cflag & CSTOPB)
- cval |= 0x04;
- if (cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(cflag & PARODD))
- cval |= UART_LCR_EPAR;
- if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
- fcr = 0;
- } else {
- fcr = UART_FCR_ENABLE_FIFO;
- switch (info->rx_trigger) {
- case 1:
- fcr |= UART_FCR_TRIGGER_1;
- break;
- case 4:
- fcr |= UART_FCR_TRIGGER_4;
- break;
- case 8:
- fcr |= UART_FCR_TRIGGER_8;
- break;
- default:
- fcr |= UART_FCR_TRIGGER_14;
- }
- }
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- info->MCR &= ~UART_MCR_AFE;
- if (cflag & CRTSCTS) {
- info->flags |= ASYNC_CTS_FLOW;
- info->IER |= UART_IER_MSI;
- if (info->type == PORT_16550A)
- info->MCR |= UART_MCR_AFE;
- } else {
- info->flags &= ~ASYNC_CTS_FLOW;
- }
- outb(info->MCR, info->base + UART_MCR);
- if (cflag & CLOCAL)
- info->flags &= ~ASYNC_CHECK_CD;
- else {
- info->flags |= ASYNC_CHECK_CD;
- info->IER |= UART_IER_MSI;
- }
- outb(info->IER, info->base + UART_IER);
- /*
- * Set up parity check flag
- */
- info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (I_INPCK(info->tty))
- info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
- info->read_status_mask |= UART_LSR_BI;
- info->ignore_status_mask = 0;
- #if 0
- /* This should be safe, but for some broken bits of hardware... */
- if (I_IGNPAR(info->tty)) {
- info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- info->read_status_mask |= UART_LSR_PE | UART_LSR_FE;
- }
- #endif
- if (I_IGNBRK(info->tty)) {
- info->ignore_status_mask |= UART_LSR_BI;
- info->read_status_mask |= UART_LSR_BI;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->tty)) {
- info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
- info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
- }
- }
- save_flags(flags);
- cli();
- outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
- outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
- outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
- outb(cval, info->base + UART_LCR); /* reset DLAB */
- outb(fcr, info->base + UART_FCR); /* set fcr */
- restore_flags(flags);
- return ret;
- }
- /*
- * ------------------------------------------------------------
- * friends of mxser_ioctl()
- * ------------------------------------------------------------
- */
- static int mxser_get_serial_info(struct mxser_struct *info,
- struct serial_struct *retinfo)
- {
- struct serial_struct tmp;
- if (!retinfo)
- return (-EFAULT);
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = info->type;
- tmp.line = info->port;
- tmp.port = info->base;
- tmp.irq = info->irq;
- tmp.flags = info->flags;
- tmp.baud_base = info->baud_base;
- tmp.close_delay = info->close_delay;
- tmp.closing_wait = info->closing_wait;
- tmp.custom_divisor = info->custom_divisor;
- tmp.hub6 = 0;
- copy_to_user(retinfo, &tmp, sizeof(*retinfo));
- return (0);
- }
- static int mxser_set_serial_info(struct mxser_struct *info,
- struct serial_struct *new_info)
- {
- struct serial_struct new_serial;
- unsigned int flags;
- int retval = 0;
- if (!new_info || !info->base)
- return (-EFAULT);
- copy_from_user(&new_serial, new_info, sizeof(new_serial));
- if ((new_serial.irq != info->irq) ||
- (new_serial.port != info->base) ||
- (new_serial.type != info->type) ||
- (new_serial.custom_divisor != info->custom_divisor) ||
- (new_serial.baud_base != info->baud_base))
- return (-EPERM);
- flags = info->flags & ASYNC_SPD_MASK;
- if (!suser()) {
- if ((new_serial.baud_base != info->baud_base) ||
- (new_serial.close_delay != info->close_delay) ||
- ((new_serial.flags & ~ASYNC_USR_MASK) !=
- (info->flags & ~ASYNC_USR_MASK)))
- return (-EPERM);
- info->flags = ((info->flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
- } else {
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
- info->flags = ((info->flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS));
- info->close_delay = new_serial.close_delay * HZ / 100;
- info->closing_wait = new_serial.closing_wait * HZ / 100;
- }
- if (info->flags & ASYNC_INITIALIZED) {
- if (flags != (info->flags & ASYNC_SPD_MASK)) {
- mxser_change_speed(info, 0);
- }
- } else
- retval = mxser_startup(info);
- return (retval);
- }
- /*
- * mxser_get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
- static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int *value)
- {
- unsigned char status;
- unsigned int result;
- unsigned long flags;
- save_flags(flags);
- cli();
- status = inb(info->base + UART_LSR);
- restore_flags(flags);
- result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
- return put_user(result, value);
- }
- /*
- * This routine sends a break character out the serial port.
- */
- static void mxser_send_break(struct mxser_struct *info, int duration)
- {
- unsigned long flags;
- if (!info->base)
- return;
- set_current_state(TASK_INTERRUPTIBLE);
- save_flags(flags);
- cli();
- outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
- schedule_timeout(duration);
- outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
- restore_flags(flags);
- }
- static int mxser_get_modem_info(struct mxser_struct *info,
- unsigned int *value)
- {
- unsigned char control, status;
- unsigned int result;
- unsigned long flags;
- control = info->MCR;
- save_flags(flags);
- cli();
- status = inb(info->base + UART_MSR);
- if (status & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(info, status);
- restore_flags(flags);
- result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
- ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
- ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
- ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
- ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
- ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
- return put_user(result, value);
- }
- static int mxser_set_modem_info(struct mxser_struct *info, unsigned int cmd,
- unsigned int *value)
- {
- unsigned int arg;
- unsigned long flags;
- if(get_user(arg, value))
- return -EFAULT;
- switch (cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS)
- info->MCR |= UART_MCR_RTS;
- if (arg & TIOCM_DTR)
- info->MCR |= UART_MCR_DTR;
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS)
- info->MCR &= ~UART_MCR_RTS;
- if (arg & TIOCM_DTR)
- info->MCR &= ~UART_MCR_DTR;
- break;
- case TIOCMSET:
- info->MCR = ((info->MCR & ~(UART_MCR_RTS | UART_MCR_DTR)) |
- ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0) |
- ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
- break;
- default:
- return (-EINVAL);
- }
- save_flags(flags);
- cli();
- outb(info->MCR, info->base + UART_MCR);
- restore_flags(flags);
- return (0);
- }
- static int mxser_read_register(int, unsigned short *);
- static int mxser_program_mode(int);
- static void mxser_normal_mode(int);
- static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
- {
- int id, i, bits;
- unsigned short regs[16], irq;
- unsigned char scratch, scratch2;
- id = mxser_read_register(cap, regs);
- if (id == C168_ASIC_ID)
- hwconf->board_type = MXSER_BOARD_C168_ISA;
- else if (id == C104_ASIC_ID)
- hwconf->board_type = MXSER_BOARD_C104_ISA;
- else if (id == CI104J_ASIC_ID)
- hwconf->board_type = MXSER_BOARD_CI104J;
- else
- return (0);
- irq = regs[9] & 0x0F;
- irq = irq | (irq << 4);
- irq = irq | (irq << 8);
- if ((irq != regs[9]) || ((id == 1) && (irq != regs[10]))) {
- return (MXSER_ERR_IRQ_CONFLIT);
- }
- if (!irq) {
- return (MXSER_ERR_IRQ);
- }
- for (i = 0; i < 8; i++)
- hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
- hwconf->irq = (int) (irq & 0x0F);
- if ((regs[12] & 0x80) == 0) {
- return (MXSER_ERR_VECTOR);
- }
- hwconf->vector = (int) regs[11]; /* interrupt vector */
- if (id == 1)
- hwconf->vector_mask = 0x00FF;
- else
- hwconf->vector_mask = 0x000F;
- for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
- if (regs[12] & bits)
- hwconf->baud_base[i] = 921600;
- else
- hwconf->baud_base[i] = 115200;
- }
- scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
- outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
- outb(0, cap + UART_EFR); /* EFR is the same as FCR */
- outb(scratch2, cap + UART_LCR);
- outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
- scratch = inb(cap + UART_IIR);
- if (scratch & 0xC0)
- hwconf->uart_type = PORT_16550A;
- else
- hwconf->uart_type = PORT_16450;
- if (id == 1)
- hwconf->ports = 8;
- else
- hwconf->ports = 4;
- return (hwconf->ports);
- }
- #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
- #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
- #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
- #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
- #define EN_CCMD 0x000 /* Chip's command register */
- #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
- #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
- #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
- #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
- #define EN0_DCFG 0x00E /* Data configuration reg WR */
- #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
- #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
- #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
- static int mxser_read_register(int port, unsigned short *regs)
- {
- int i, k, value, id;
- unsigned int j;
- id = mxser_program_mode(port);
- if (id < 0)
- return (id);
- for (i = 0; i < 14; i++) {
- k = (i & 0x3F) | 0x180;
- for (j = 0x100; j > 0; j >>= 1) {
- outb(CHIP_CS, port);
- if (k & j) {
- outb(CHIP_CS | CHIP_DO, port);
- outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
- } else {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
- }
- }
- (void) inb(port);
- value = 0;
- for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port);
- if (inb(port) & CHIP_DI)
- value |= j;
- }
- regs[i] = value;
- outb(0, port);
- }
- mxser_normal_mode(port);
- return (id);
- }
- static int mxser_program_mode(int port)
- {
- int id, i, j, n;
- unsigned long flags;
- save_flags(flags);
- cli();
- outb(0, port);
- outb(0, port);
- outb(0, port);
- (void) inb(port);
- (void) inb(port);
- outb(0, port);
- (void) inb(port);
- restore_flags(flags);
- id = inb(port + 1) & 0x1F;
- if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != CI104J_ASIC_ID))
- return (-1);
- for (i = 0, j = 0; i < 4; i++) {
- n = inb(port + 2);
- if (n == 'M') {
- j = 1;
- } else if ((j == 1) && (n == 1)) {
- j = 2;
- break;
- } else
- j = 0;
- }
- if (j != 2)
- id = -2;
- return (id);
- }
- static void mxser_normal_mode(int port)
- {
- int i, n;
- outb(0xA5, port + 1);
- outb(0x80, port + 3);
- outb(12, port + 0); /* 9600 bps */
- outb(0, port + 1);
- outb(0x03, port + 3); /* 8 data bits */
- outb(0x13, port + 4); /* loop back mode */
- for (i = 0; i < 16; i++) {
- n = inb(port + 5);
- if ((n & 0x61) == 0x60)
- break;
- if ((n & 1) == 1)
- (void) inb(port);
- }
- outb(0x00, port + 4);
- }