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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 driver\n");
if ((err |= tty_unregister_driver(&mxvar_sdriver)))
printk("Couldn't unregister MOXA Smartio family serial driver\n");
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 %s\n", 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 = %d\n", 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 configured\n");
else if (retval == MXSER_ERR_IRQ_CONFLIT)
printk("Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_VECTOR)
printk("Invalid interrupt vector,board not configured\n");
else if (retval == MXSER_ERR_IOADDR)
printk("Invalid I/O address,board not configured\n");
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 configured\n");
else if (retval == MXSER_ERR_IRQ_CONFLIT)
printk("Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_VECTOR)
printk("Invalid interrupt vector,board not configured\n");
else if (retval == MXSER_ERR_IOADDR)
printk("Invalid I/O address,board not configured\n");
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 configured\n", 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 configured\n");
else if (retval == MXSER_ERR_IRQ_CONFLIT)
printk("Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_VECTOR)
printk("Invalid interrupt vector,board not configured\n");
else if (retval == MXSER_ERR_IOADDR)
printk("Invalid I/O address,board not configured\n");
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 %d\n", info->count);
info->count = 1;
}
if (--info->count < 0) {
printk("mxser_close: bad serial port count for ttys%d: %d\n",
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 break\n");
#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);
}
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