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linux_dsm_epyc7002/drivers/char/moxa.c
dann frazier a2f72982e2 old buffer overflow in moxa driver 
I noticed that the moxa input checking security bug described by
CVE-2005-0504 appears to remain unfixed upstream.

The issue is described here:
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0504

Debian has been shipping the following patch from Andres Salomon.

(akpm: it's a privileged operation)

Signed-off-by: dann frazier <dannf@hp.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:14 -07:00

2868 lines
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/*****************************************************************************/
/*
* moxa.c -- MOXA Intellio 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.
*/
/*
* MOXA Intellio Series Driver
* for : LINUX
* date : 1999/1/7
* version : 5.1
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/ioport.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/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#define MOXA_VERSION "5.1k"
#define MOXAMAJOR 172
#define MOXACUMAJOR 173
#define MAX_BOARDS 4 /* Don't change this value */
#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
/*
* Define the Moxa PCI vendor and device IDs.
*/
#define MOXA_BUS_TYPE_ISA 0
#define MOXA_BUS_TYPE_PCI 1
enum {
MOXA_BOARD_C218_PCI = 1,
MOXA_BOARD_C218_ISA,
MOXA_BOARD_C320_PCI,
MOXA_BOARD_C320_ISA,
MOXA_BOARD_CP204J,
};
static char *moxa_brdname[] =
{
"C218 Turbo PCI series",
"C218 Turbo ISA series",
"C320 Turbo PCI series",
"C320 Turbo ISA series",
"CP-204J series",
};
#ifdef CONFIG_PCI
static struct pci_device_id moxa_pcibrds[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
.driver_data = MOXA_BOARD_C218_PCI },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
.driver_data = MOXA_BOARD_C320_PCI },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
.driver_data = MOXA_BOARD_CP204J },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
#endif /* CONFIG_PCI */
struct moxa_isa_board_conf {
int boardType;
int numPorts;
unsigned long baseAddr;
};
static struct moxa_isa_board_conf moxa_isa_boards[] =
{
/* {MOXA_BOARD_C218_ISA,8,0xDC000}, */
};
static struct moxa_board_conf {
int boardType;
int numPorts;
unsigned long baseAddr;
int busType;
int loadstat;
void __iomem *basemem;
void __iomem *intNdx;
void __iomem *intPend;
void __iomem *intTable;
} moxa_boards[MAX_BOARDS];
struct mxser_mstatus {
tcflag_t cflag;
int cts;
int dsr;
int ri;
int dcd;
};
struct moxaq_str {
int inq;
int outq;
};
struct moxa_port {
int type;
int port;
int close_delay;
unsigned short closing_wait;
int count;
int blocked_open;
long event; /* long req'd for set_bit --RR */
int asyncflags;
unsigned long statusflags;
struct tty_struct *tty;
int cflag;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
struct timer_list emptyTimer;
char chkPort;
char lineCtrl;
void __iomem *tableAddr;
long curBaud;
char DCDState;
char lowChkFlag;
ushort breakCnt;
};
/* statusflags */
#define TXSTOPPED 0x1
#define LOWWAIT 0x2
#define EMPTYWAIT 0x4
#define THROTTLE 0x8
#define SERIAL_DO_RESTART
#define WAKEUP_CHARS 256
static int verbose = 0;
static int ttymajor = MOXAMAJOR;
/* Variables for insmod */
#ifdef MODULE
static int baseaddr[4];
static int type[4];
static int numports[4];
#endif
MODULE_AUTHOR("William Chen");
MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
MODULE_LICENSE("GPL");
#ifdef MODULE
module_param_array(type, int, NULL, 0);
module_param_array(baseaddr, int, NULL, 0);
module_param_array(numports, int, NULL, 0);
#endif
module_param(ttymajor, int, 0);
module_param(verbose, bool, 0644);
/*
* static functions:
*/
static int moxa_open(struct tty_struct *, struct file *);
static void moxa_close(struct tty_struct *, struct file *);
static int moxa_write(struct tty_struct *, const unsigned char *, int);
static int moxa_write_room(struct tty_struct *);
static void moxa_flush_buffer(struct tty_struct *);
static int moxa_chars_in_buffer(struct tty_struct *);
static void moxa_flush_chars(struct tty_struct *);
static void moxa_put_char(struct tty_struct *, unsigned char);
static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long);
static void moxa_throttle(struct tty_struct *);
static void moxa_unthrottle(struct tty_struct *);
static void moxa_set_termios(struct tty_struct *, struct ktermios *);
static void moxa_stop(struct tty_struct *);
static void moxa_start(struct tty_struct *);
static void moxa_hangup(struct tty_struct *);
static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
static void moxa_poll(unsigned long);
static void set_tty_param(struct tty_struct *);
static int block_till_ready(struct tty_struct *, struct file *,
struct moxa_port *);
static void setup_empty_event(struct tty_struct *);
static void check_xmit_empty(unsigned long);
static void shut_down(struct moxa_port *);
static void receive_data(struct moxa_port *);
/*
* moxa board interface functions:
*/
static void MoxaDriverInit(void);
static int MoxaDriverIoctl(unsigned int, unsigned long, int);
static int MoxaDriverPoll(void);
static int MoxaPortsOfCard(int);
static int MoxaPortIsValid(int);
static void MoxaPortEnable(int);
static void MoxaPortDisable(int);
static long MoxaPortGetMaxBaud(int);
static long MoxaPortSetBaud(int, long);
static int MoxaPortSetTermio(int, struct ktermios *, speed_t);
static int MoxaPortGetLineOut(int, int *, int *);
static void MoxaPortLineCtrl(int, int, int);
static void MoxaPortFlowCtrl(int, int, int, int, int, int);
static int MoxaPortLineStatus(int);
static int MoxaPortDCDChange(int);
static int MoxaPortDCDON(int);
static void MoxaPortFlushData(int, int);
static int MoxaPortWriteData(int, unsigned char *, int);
static int MoxaPortReadData(int, struct tty_struct *tty);
static int MoxaPortTxQueue(int);
static int MoxaPortRxQueue(int);
static int MoxaPortTxFree(int);
static void MoxaPortTxDisable(int);
static void MoxaPortTxEnable(int);
static int MoxaPortResetBrkCnt(int);
static void MoxaPortSendBreak(int, int);
static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
static void MoxaSetFifo(int port, int enable);
static const struct tty_operations moxa_ops = {
.open = moxa_open,
.close = moxa_close,
.write = moxa_write,
.write_room = moxa_write_room,
.flush_buffer = moxa_flush_buffer,
.chars_in_buffer = moxa_chars_in_buffer,
.flush_chars = moxa_flush_chars,
.put_char = moxa_put_char,
.ioctl = moxa_ioctl,
.throttle = moxa_throttle,
.unthrottle = moxa_unthrottle,
.set_termios = moxa_set_termios,
.stop = moxa_stop,
.start = moxa_start,
.hangup = moxa_hangup,
.tiocmget = moxa_tiocmget,
.tiocmset = moxa_tiocmset,
};
static struct tty_driver *moxaDriver;
static struct moxa_port moxa_ports[MAX_PORTS];
static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
static DEFINE_SPINLOCK(moxa_lock);
#ifdef CONFIG_PCI
static int __devinit moxa_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct moxa_board_conf *board;
unsigned int i;
int board_type = ent->driver_data;
int retval;
retval = pci_enable_device(pdev);
if (retval)
goto err;
for (i = 0; i < MAX_BOARDS; i++)
if (moxa_boards[i].basemem == NULL)
break;
retval = -ENODEV;
if (i >= MAX_BOARDS) {
if (verbose)
printk("More than %d MOXA Intellio family boards "
"found. Board is ignored.\n", MAX_BOARDS);
goto err;
}
board = &moxa_boards[i];
board->basemem = pci_iomap(pdev, 2, 0x4000);
if (board->basemem == NULL)
goto err;
board->boardType = board_type;
switch (board_type) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
board->numPorts = 8;
break;
case MOXA_BOARD_CP204J:
board->numPorts = 4;
break;
default:
board->numPorts = 0;
break;
}
board->busType = MOXA_BUS_TYPE_PCI;
pci_set_drvdata(pdev, board);
return (0);
err:
return retval;
}
static void __devexit moxa_pci_remove(struct pci_dev *pdev)
{
struct moxa_board_conf *brd = pci_get_drvdata(pdev);
pci_iounmap(pdev, brd->basemem);
brd->basemem = NULL;
}
static struct pci_driver moxa_pci_driver = {
.name = "moxa",
.id_table = moxa_pcibrds,
.probe = moxa_pci_probe,
.remove = __devexit_p(moxa_pci_remove)
};
#endif /* CONFIG_PCI */
static int __init moxa_init(void)
{
int i, numBoards, retval = 0;
struct moxa_port *ch;
printk(KERN_INFO "MOXA Intellio family driver version %s\n", MOXA_VERSION);
moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
if (!moxaDriver)
return -ENOMEM;
moxaDriver->owner = THIS_MODULE;
moxaDriver->name = "ttyMX";
moxaDriver->major = ttymajor;
moxaDriver->minor_start = 0;
moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
moxaDriver->subtype = SERIAL_TYPE_NORMAL;
moxaDriver->init_termios = tty_std_termios;
moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
moxaDriver->init_termios.c_ispeed = 9600;
moxaDriver->init_termios.c_ospeed = 9600;
moxaDriver->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(moxaDriver, &moxa_ops);
for (i = 0, ch = moxa_ports; i < MAX_PORTS; i++, ch++) {
ch->type = PORT_16550A;
ch->port = i;
ch->close_delay = 5 * HZ / 10;
ch->closing_wait = 30 * HZ;
ch->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
init_waitqueue_head(&ch->open_wait);
init_waitqueue_head(&ch->close_wait);
setup_timer(&ch->emptyTimer, check_xmit_empty,
(unsigned long)ch);
}
printk("Tty devices major number = %d\n", ttymajor);
if (tty_register_driver(moxaDriver)) {
printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
put_tty_driver(moxaDriver);
return -1;
}
mod_timer(&moxaTimer, jiffies + HZ / 50);
/* Find the boards defined in source code */
numBoards = 0;
for (i = 0; i < MAX_BOARDS; i++) {
if ((moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA) ||
(moxa_isa_boards[i].boardType == MOXA_BOARD_C320_ISA)) {
moxa_boards[numBoards].boardType = moxa_isa_boards[i].boardType;
if (moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA)
moxa_boards[numBoards].numPorts = 8;
else
moxa_boards[numBoards].numPorts = moxa_isa_boards[i].numPorts;
moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
moxa_boards[numBoards].baseAddr = moxa_isa_boards[i].baseAddr;
if (verbose)
printk("Board %2d: %s board(baseAddr=%lx)\n",
numBoards + 1,
moxa_brdname[moxa_boards[numBoards].boardType - 1],
moxa_boards[numBoards].baseAddr);
numBoards++;
}
}
/* Find the boards defined form module args. */
#ifdef MODULE
for (i = 0; i < MAX_BOARDS; i++) {
if ((type[i] == MOXA_BOARD_C218_ISA) ||
(type[i] == MOXA_BOARD_C320_ISA)) {
if (verbose)
printk("Board %2d: %s board(baseAddr=%lx)\n",
numBoards + 1,
moxa_brdname[type[i] - 1],
(unsigned long) baseaddr[i]);
if (numBoards >= MAX_BOARDS) {
if (verbose)
printk("More than %d MOXA Intellio family boards found. Board is ignored.", MAX_BOARDS);
continue;
}
moxa_boards[numBoards].boardType = type[i];
if (moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA)
moxa_boards[numBoards].numPorts = 8;
else
moxa_boards[numBoards].numPorts = numports[i];
moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
moxa_boards[numBoards].baseAddr = baseaddr[i];
numBoards++;
}
}
#endif
#ifdef CONFIG_PCI
retval = pci_register_driver(&moxa_pci_driver);
if (retval) {
printk(KERN_ERR "Can't register moxa pci driver!\n");
if (numBoards)
retval = 0;
}
#endif
for (i = 0; i < numBoards; i++) {
moxa_boards[i].basemem = ioremap(moxa_boards[i].baseAddr,
0x4000);
}
return retval;
}
static void __exit moxa_exit(void)
{
int i;
if (verbose)
printk("Unloading module moxa ...\n");
del_timer_sync(&moxaTimer);
for (i = 0; i < MAX_PORTS; i++)
del_timer_sync(&moxa_ports[i].emptyTimer);
if (tty_unregister_driver(moxaDriver))
printk("Couldn't unregister MOXA Intellio family serial driver\n");
put_tty_driver(moxaDriver);
#ifdef CONFIG_PCI
pci_unregister_driver(&moxa_pci_driver);
#endif
for (i = 0; i < MAX_BOARDS; i++)
if (moxa_boards[i].basemem)
iounmap(moxa_boards[i].basemem);
if (verbose)
printk("Done\n");
}
module_init(moxa_init);
module_exit(moxa_exit);
static int moxa_open(struct tty_struct *tty, struct file *filp)
{
struct moxa_port *ch;
int port;
int retval;
port = tty->index;
if (port == MAX_PORTS) {
return (0);
}
if (!MoxaPortIsValid(port)) {
tty->driver_data = NULL;
return (-ENODEV);
}
ch = &moxa_ports[port];
ch->count++;
tty->driver_data = ch;
ch->tty = tty;
if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
ch->statusflags = 0;
set_tty_param(tty);
MoxaPortLineCtrl(ch->port, 1, 1);
MoxaPortEnable(ch->port);
ch->asyncflags |= ASYNC_INITIALIZED;
}
retval = block_till_ready(tty, filp, ch);
moxa_unthrottle(tty);
if (ch->type == PORT_16550A) {
MoxaSetFifo(ch->port, 1);
} else {
MoxaSetFifo(ch->port, 0);
}
return (retval);
}
static void moxa_close(struct tty_struct *tty, struct file *filp)
{
struct moxa_port *ch;
int port;
port = tty->index;
if (port == MAX_PORTS) {
return;
}
if (!MoxaPortIsValid(port)) {
#ifdef SERIAL_DEBUG_CLOSE
printk("Invalid portno in moxa_close\n");
#endif
tty->driver_data = NULL;
return;
}
if (tty->driver_data == NULL) {
return;
}
if (tty_hung_up_p(filp)) {
return;
}
ch = (struct moxa_port *) tty->driver_data;
if ((tty->count == 1) && (ch->count != 1)) {
printk("moxa_close: bad serial port count; tty->count is 1, "
"ch->count is %d\n", ch->count);
ch->count = 1;
}
if (--ch->count < 0) {
printk("moxa_close: bad serial port count, device=%s\n",
tty->name);
ch->count = 0;
}
if (ch->count) {
return;
}
ch->asyncflags |= ASYNC_CLOSING;
ch->cflag = tty->termios->c_cflag;
if (ch->asyncflags & ASYNC_INITIALIZED) {
setup_empty_event(tty);
tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
del_timer_sync(&moxa_ports[ch->port].emptyTimer);
}
shut_down(ch);
MoxaPortFlushData(port, 2);
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
ch->event = 0;
ch->tty = NULL;
if (ch->blocked_open) {
if (ch->close_delay) {
msleep_interruptible(jiffies_to_msecs(ch->close_delay));
}
wake_up_interruptible(&ch->open_wait);
}
ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
wake_up_interruptible(&ch->close_wait);
}
static int moxa_write(struct tty_struct *tty,
const unsigned char *buf, int count)
{
struct moxa_port *ch;
int len, port;
unsigned long flags;
ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return (0);
port = ch->port;
spin_lock_irqsave(&moxa_lock, flags);
len = MoxaPortWriteData(port, (unsigned char *) buf, count);
spin_unlock_irqrestore(&moxa_lock, flags);
/*********************************************
if ( !(ch->statusflags & LOWWAIT) &&
((len != count) || (MoxaPortTxFree(port) <= 100)) )
************************************************/
ch->statusflags |= LOWWAIT;
return (len);
}
static int moxa_write_room(struct tty_struct *tty)
{
struct moxa_port *ch;
if (tty->stopped)
return (0);
ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return (0);
return (MoxaPortTxFree(ch->port));
}
static void moxa_flush_buffer(struct tty_struct *tty)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return;
MoxaPortFlushData(ch->port, 1);
tty_wakeup(tty);
}
static int moxa_chars_in_buffer(struct tty_struct *tty)
{
int chars;
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
/*
* Sigh...I have to check if driver_data is NULL here, because
* if an open() fails, the TTY subsystem eventually calls
* tty_wait_until_sent(), which calls the driver's chars_in_buffer()
* routine. And since the open() failed, we return 0 here. TDJ
*/
if (ch == NULL)
return (0);
chars = MoxaPortTxQueue(ch->port);
if (chars) {
/*
* Make it possible to wakeup anything waiting for output
* in tty_ioctl.c, etc.
*/
if (!(ch->statusflags & EMPTYWAIT))
setup_empty_event(tty);
}
return (chars);
}
static void moxa_flush_chars(struct tty_struct *tty)
{
/*
* Don't think I need this, because this is called to empty the TX
* buffer for the 16450, 16550, etc.
*/
}
static void moxa_put_char(struct tty_struct *tty, unsigned char c)
{
struct moxa_port *ch;
int port;
unsigned long flags;
ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return;
port = ch->port;
spin_lock_irqsave(&moxa_lock, flags);
MoxaPortWriteData(port, &c, 1);
spin_unlock_irqrestore(&moxa_lock, flags);
/************************************************
if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
*************************************************/
ch->statusflags |= LOWWAIT;
}
static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
int port;
int flag = 0, dtr, rts;
port = tty->index;
if ((port != MAX_PORTS) && (!ch))
return (-EINVAL);
MoxaPortGetLineOut(ch->port, &dtr, &rts);
if (dtr)
flag |= TIOCM_DTR;
if (rts)
flag |= TIOCM_RTS;
dtr = MoxaPortLineStatus(ch->port);
if (dtr & 1)
flag |= TIOCM_CTS;
if (dtr & 2)
flag |= TIOCM_DSR;
if (dtr & 4)
flag |= TIOCM_CD;
return flag;
}
static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
int port;
int dtr, rts;
port = tty->index;
if ((port != MAX_PORTS) && (!ch))
return (-EINVAL);
MoxaPortGetLineOut(ch->port, &dtr, &rts);
if (set & TIOCM_RTS)
rts = 1;
if (set & TIOCM_DTR)
dtr = 1;
if (clear & TIOCM_RTS)
rts = 0;
if (clear & TIOCM_DTR)
dtr = 0;
MoxaPortLineCtrl(ch->port, dtr, rts);
return 0;
}
static int moxa_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
register int port;
void __user *argp = (void __user *)arg;
int retval;
port = tty->index;
if ((port != MAX_PORTS) && (!ch))
return (-EINVAL);
switch (cmd) {
case TCSBRK: /* SVID version: non-zero arg --> no break */
retval = tty_check_change(tty);
if (retval)
return (retval);
setup_empty_event(tty);
tty_wait_until_sent(tty, 0);
if (!arg)
MoxaPortSendBreak(ch->port, 0);
return (0);
case TCSBRKP: /* support for POSIX tcsendbreak() */
retval = tty_check_change(tty);
if (retval)
return (retval);
setup_empty_event(tty);
tty_wait_until_sent(tty, 0);
MoxaPortSendBreak(ch->port, arg);
return (0);
case TIOCGSOFTCAR:
return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
case TIOCSSOFTCAR:
if(get_user(retval, (unsigned long __user *) argp))
return -EFAULT;
arg = retval;
tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
(arg ? CLOCAL : 0));
if (C_CLOCAL(tty))
ch->asyncflags &= ~ASYNC_CHECK_CD;
else
ch->asyncflags |= ASYNC_CHECK_CD;
return (0);
case TIOCGSERIAL:
return moxa_get_serial_info(ch, argp);
case TIOCSSERIAL:
return moxa_set_serial_info(ch, argp);
default:
retval = MoxaDriverIoctl(cmd, arg, port);
}
return (retval);
}
static void moxa_throttle(struct tty_struct *tty)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
ch->statusflags |= THROTTLE;
}
static void moxa_unthrottle(struct tty_struct *tty)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
ch->statusflags &= ~THROTTLE;
}
static void moxa_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return;
set_tty_param(tty);
if (!(old_termios->c_cflag & CLOCAL) &&
(tty->termios->c_cflag & CLOCAL))
wake_up_interruptible(&ch->open_wait);
}
static void moxa_stop(struct tty_struct *tty)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return;
MoxaPortTxDisable(ch->port);
ch->statusflags |= TXSTOPPED;
}
static void moxa_start(struct tty_struct *tty)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
if (ch == NULL)
return;
if (!(ch->statusflags & TXSTOPPED))
return;
MoxaPortTxEnable(ch->port);
ch->statusflags &= ~TXSTOPPED;
}
static void moxa_hangup(struct tty_struct *tty)
{
struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
moxa_flush_buffer(tty);
shut_down(ch);
ch->event = 0;
ch->count = 0;
ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
ch->tty = NULL;
wake_up_interruptible(&ch->open_wait);
}
static void moxa_poll(unsigned long ignored)
{
register int card;
struct moxa_port *ch;
struct tty_struct *tp;
int i, ports;
del_timer(&moxaTimer);
if (MoxaDriverPoll() < 0) {
mod_timer(&moxaTimer, jiffies + HZ / 50);
return;
}
for (card = 0; card < MAX_BOARDS; card++) {
if ((ports = MoxaPortsOfCard(card)) <= 0)
continue;
ch = &moxa_ports[card * MAX_PORTS_PER_BOARD];
for (i = 0; i < ports; i++, ch++) {
if ((ch->asyncflags & ASYNC_INITIALIZED) == 0)
continue;
if (!(ch->statusflags & THROTTLE) &&
(MoxaPortRxQueue(ch->port) > 0))
receive_data(ch);
if ((tp = ch->tty) == 0)
continue;
if (ch->statusflags & LOWWAIT) {
if (MoxaPortTxQueue(ch->port) <= WAKEUP_CHARS) {
if (!tp->stopped) {
ch->statusflags &= ~LOWWAIT;
tty_wakeup(tp);
}
}
}
if (!I_IGNBRK(tp) && (MoxaPortResetBrkCnt(ch->port) > 0)) {
tty_insert_flip_char(tp, 0, TTY_BREAK);
tty_schedule_flip(tp);
}
if (MoxaPortDCDChange(ch->port)) {
if (ch->asyncflags & ASYNC_CHECK_CD) {
if (MoxaPortDCDON(ch->port))
wake_up_interruptible(&ch->open_wait);
else {
tty_hangup(tp);
wake_up_interruptible(&ch->open_wait);
ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
}
}
}
}
}
mod_timer(&moxaTimer, jiffies + HZ / 50);
}
/******************************************************************************/
static void set_tty_param(struct tty_struct *tty)
{
register struct ktermios *ts;
struct moxa_port *ch;
int rts, cts, txflow, rxflow, xany;
ch = (struct moxa_port *) tty->driver_data;
ts = tty->termios;
if (ts->c_cflag & CLOCAL)
ch->asyncflags &= ~ASYNC_CHECK_CD;
else
ch->asyncflags |= ASYNC_CHECK_CD;
rts = cts = txflow = rxflow = xany = 0;
if (ts->c_cflag & CRTSCTS)
rts = cts = 1;
if (ts->c_iflag & IXON)
txflow = 1;
if (ts->c_iflag & IXOFF)
rxflow = 1;
if (ts->c_iflag & IXANY)
xany = 1;
MoxaPortFlowCtrl(ch->port, rts, cts, txflow, rxflow, xany);
MoxaPortSetTermio(ch->port, ts, tty_get_baud_rate(tty));
}
static int block_till_ready(struct tty_struct *tty, struct file *filp,
struct moxa_port *ch)
{
DECLARE_WAITQUEUE(wait,current);
unsigned long flags;
int retval;
int do_clocal = C_CLOCAL(tty);
/*
* 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) || (ch->asyncflags & ASYNC_CLOSING)) {
if (ch->asyncflags & ASYNC_CLOSING)
interruptible_sleep_on(&ch->close_wait);
#ifdef SERIAL_DO_RESTART
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
return (-EAGAIN);
else
return (-ERESTARTSYS);
#else
return (-EAGAIN);
#endif
}
/*
* If non-blocking mode is set, then make the check up front
* and then exit.
*/
if (filp->f_flags & O_NONBLOCK) {
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
return (0);
}
/*
* Block waiting for the carrier detect and the line to become free
*/
retval = 0;
add_wait_queue(&ch->open_wait, &wait);
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready before block: ttys%d, count = %d\n",
ch->line, ch->count);
#endif
spin_lock_irqsave(&moxa_lock, flags);
if (!tty_hung_up_p(filp))
ch->count--;
ch->blocked_open++;
spin_unlock_irqrestore(&moxa_lock, flags);
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
!(ch->asyncflags & ASYNC_INITIALIZED)) {
#ifdef SERIAL_DO_RESTART
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
#else
retval = -EAGAIN;
#endif
break;
}
if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
MoxaPortDCDON(ch->port)))
break;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
schedule();
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&ch->open_wait, &wait);
spin_lock_irqsave(&moxa_lock, flags);
if (!tty_hung_up_p(filp))
ch->count++;
ch->blocked_open--;
spin_unlock_irqrestore(&moxa_lock, flags);
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready after blocking: ttys%d, count = %d\n",
ch->line, ch->count);
#endif
if (retval)
return (retval);
/* FIXME: review to see if we need to use set_bit on these */
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
static void setup_empty_event(struct tty_struct *tty)
{
struct moxa_port *ch = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&moxa_lock, flags);
ch->statusflags |= EMPTYWAIT;
mod_timer(&moxa_ports[ch->port].emptyTimer, jiffies + HZ);
spin_unlock_irqrestore(&moxa_lock, flags);
}
static void check_xmit_empty(unsigned long data)
{
struct moxa_port *ch;
ch = (struct moxa_port *) data;
del_timer_sync(&moxa_ports[ch->port].emptyTimer);
if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
if (MoxaPortTxQueue(ch->port) == 0) {
ch->statusflags &= ~EMPTYWAIT;
tty_wakeup(ch->tty);
return;
}
mod_timer(&moxa_ports[ch->port].emptyTimer, jiffies + HZ);
} else
ch->statusflags &= ~EMPTYWAIT;
}
static void shut_down(struct moxa_port *ch)
{
struct tty_struct *tp;
if (!(ch->asyncflags & ASYNC_INITIALIZED))
return;
tp = ch->tty;
MoxaPortDisable(ch->port);
/*
* If we're a modem control device and HUPCL is on, drop RTS & DTR.
*/
if (tp->termios->c_cflag & HUPCL)
MoxaPortLineCtrl(ch->port, 0, 0);
ch->asyncflags &= ~ASYNC_INITIALIZED;
}
static void receive_data(struct moxa_port *ch)
{
struct tty_struct *tp;
struct ktermios *ts;
unsigned long flags;
ts = NULL;
tp = ch->tty;
if (tp)
ts = tp->termios;
/**************************************************
if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
*****************************************************/
if (!tp || !ts) {
MoxaPortFlushData(ch->port, 0);
return;
}
spin_lock_irqsave(&moxa_lock, flags);
MoxaPortReadData(ch->port, tp);
spin_unlock_irqrestore(&moxa_lock, flags);
tty_schedule_flip(tp);
}
#define Magic_code 0x404
/*
* System Configuration
*/
/*
* for C218 BIOS initialization
*/
#define C218_ConfBase 0x800
#define C218_status (C218_ConfBase + 0) /* BIOS running status */
#define C218_diag (C218_ConfBase + 2) /* diagnostic status */
#define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
#define C218DLoad_len (C218_ConfBase + 6) /* WORD */
#define C218check_sum (C218_ConfBase + 8) /* BYTE */
#define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
#define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
#define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
#define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
#define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
#define C218_LoadBuf 0x0F00
#define C218_KeyCode 0x218
#define CP204J_KeyCode 0x204
/*
* for C320 BIOS initialization
*/
#define C320_ConfBase 0x800
#define C320_LoadBuf 0x0f00
#define STS_init 0x05 /* for C320_status */
#define C320_status C320_ConfBase + 0 /* BIOS running status */
#define C320_diag C320_ConfBase + 2 /* diagnostic status */
#define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
#define C320DLoad_len C320_ConfBase + 6 /* WORD */
#define C320check_sum C320_ConfBase + 8 /* WORD */
#define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
#define C320bapi_len C320_ConfBase + 0x0c /* WORD */
#define C320UART_no C320_ConfBase + 0x0e /* WORD */
#define C320_KeyCode 0x320
#define FixPage_addr 0x0000 /* starting addr of static page */
#define DynPage_addr 0x2000 /* starting addr of dynamic page */
#define C218_start 0x3000 /* starting addr of C218 BIOS prg */
#define Control_reg 0x1ff0 /* select page and reset control */
#define HW_reset 0x80
/*
* Function Codes
*/
#define FC_CardReset 0x80
#define FC_ChannelReset 1 /* C320 firmware not supported */
#define FC_EnableCH 2
#define FC_DisableCH 3
#define FC_SetParam 4
#define FC_SetMode 5
#define FC_SetRate 6
#define FC_LineControl 7
#define FC_LineStatus 8
#define FC_XmitControl 9
#define FC_FlushQueue 10
#define FC_SendBreak 11
#define FC_StopBreak 12
#define FC_LoopbackON 13
#define FC_LoopbackOFF 14
#define FC_ClrIrqTable 15
#define FC_SendXon 16
#define FC_SetTermIrq 17 /* C320 firmware not supported */
#define FC_SetCntIrq 18 /* C320 firmware not supported */
#define FC_SetBreakIrq 19
#define FC_SetLineIrq 20
#define FC_SetFlowCtl 21
#define FC_GenIrq 22
#define FC_InCD180 23
#define FC_OutCD180 24
#define FC_InUARTreg 23
#define FC_OutUARTreg 24
#define FC_SetXonXoff 25
#define FC_OutCD180CCR 26
#define FC_ExtIQueue 27
#define FC_ExtOQueue 28
#define FC_ClrLineIrq 29
#define FC_HWFlowCtl 30
#define FC_GetClockRate 35
#define FC_SetBaud 36
#define FC_SetDataMode 41
#define FC_GetCCSR 43
#define FC_GetDataError 45
#define FC_RxControl 50
#define FC_ImmSend 51
#define FC_SetXonState 52
#define FC_SetXoffState 53
#define FC_SetRxFIFOTrig 54
#define FC_SetTxFIFOCnt 55
#define FC_UnixRate 56
#define FC_UnixResetTimer 57
#define RxFIFOTrig1 0
#define RxFIFOTrig4 1
#define RxFIFOTrig8 2
#define RxFIFOTrig14 3
/*
* Dual-Ported RAM
*/
#define DRAM_global 0
#define INT_data (DRAM_global + 0)
#define Config_base (DRAM_global + 0x108)
#define IRQindex (INT_data + 0)
#define IRQpending (INT_data + 4)
#define IRQtable (INT_data + 8)
/*
* Interrupt Status
*/
#define IntrRx 0x01 /* receiver data O.K. */
#define IntrTx 0x02 /* transmit buffer empty */
#define IntrFunc 0x04 /* function complete */
#define IntrBreak 0x08 /* received break */
#define IntrLine 0x10 /* line status change
for transmitter */
#define IntrIntr 0x20 /* received INTR code */
#define IntrQuit 0x40 /* received QUIT code */
#define IntrEOF 0x80 /* received EOF code */
#define IntrRxTrigger 0x100 /* rx data count reach tigger value */
#define IntrTxTrigger 0x200 /* tx data count below trigger value */
#define Magic_no (Config_base + 0)
#define Card_model_no (Config_base + 2)
#define Total_ports (Config_base + 4)
#define Module_cnt (Config_base + 8)
#define Module_no (Config_base + 10)
#define Timer_10ms (Config_base + 14)
#define Disable_IRQ (Config_base + 20)
#define TMS320_PORT1 (Config_base + 22)
#define TMS320_PORT2 (Config_base + 24)
#define TMS320_CLOCK (Config_base + 26)
/*
* DATA BUFFER in DRAM
*/
#define Extern_table 0x400 /* Base address of the external table
(24 words * 64) total 3K bytes
(24 words * 128) total 6K bytes */
#define Extern_size 0x60 /* 96 bytes */
#define RXrptr 0x00 /* read pointer for RX buffer */
#define RXwptr 0x02 /* write pointer for RX buffer */
#define TXrptr 0x04 /* read pointer for TX buffer */
#define TXwptr 0x06 /* write pointer for TX buffer */
#define HostStat 0x08 /* IRQ flag and general flag */
#define FlagStat 0x0A
#define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
/* x x x x | | | | */
/* | | | + CTS flow */
/* | | +--- RTS flow */
/* | +------ TX Xon/Xoff */
/* +--------- RX Xon/Xoff */
#define Break_cnt 0x0E /* received break count */
#define CD180TXirq 0x10 /* if non-0: enable TX irq */
#define RX_mask 0x12
#define TX_mask 0x14
#define Ofs_rxb 0x16
#define Ofs_txb 0x18
#define Page_rxb 0x1A
#define Page_txb 0x1C
#define EndPage_rxb 0x1E
#define EndPage_txb 0x20
#define Data_error 0x22
#define RxTrigger 0x28
#define TxTrigger 0x2a
#define rRXwptr 0x34
#define Low_water 0x36
#define FuncCode 0x40
#define FuncArg 0x42
#define FuncArg1 0x44
#define C218rx_size 0x2000 /* 8K bytes */
#define C218tx_size 0x8000 /* 32K bytes */
#define C218rx_mask (C218rx_size - 1)
#define C218tx_mask (C218tx_size - 1)
#define C320p8rx_size 0x2000
#define C320p8tx_size 0x8000
#define C320p8rx_mask (C320p8rx_size - 1)
#define C320p8tx_mask (C320p8tx_size - 1)
#define C320p16rx_size 0x2000
#define C320p16tx_size 0x4000
#define C320p16rx_mask (C320p16rx_size - 1)
#define C320p16tx_mask (C320p16tx_size - 1)
#define C320p24rx_size 0x2000
#define C320p24tx_size 0x2000
#define C320p24rx_mask (C320p24rx_size - 1)
#define C320p24tx_mask (C320p24tx_size - 1)
#define C320p32rx_size 0x1000
#define C320p32tx_size 0x1000
#define C320p32rx_mask (C320p32rx_size - 1)
#define C320p32tx_mask (C320p32tx_size - 1)
#define Page_size 0x2000
#define Page_mask (Page_size - 1)
#define C218rx_spage 3
#define C218tx_spage 4
#define C218rx_pageno 1
#define C218tx_pageno 4
#define C218buf_pageno 5
#define C320p8rx_spage 3
#define C320p8tx_spage 4
#define C320p8rx_pgno 1
#define C320p8tx_pgno 4
#define C320p8buf_pgno 5
#define C320p16rx_spage 3
#define C320p16tx_spage 4
#define C320p16rx_pgno 1
#define C320p16tx_pgno 2
#define C320p16buf_pgno 3
#define C320p24rx_spage 3
#define C320p24tx_spage 4
#define C320p24rx_pgno 1
#define C320p24tx_pgno 1
#define C320p24buf_pgno 2
#define C320p32rx_spage 3
#define C320p32tx_ofs C320p32rx_size
#define C320p32tx_spage 3
#define C320p32buf_pgno 1
/*
* Host Status
*/
#define WakeupRx 0x01
#define WakeupTx 0x02
#define WakeupBreak 0x08
#define WakeupLine 0x10
#define WakeupIntr 0x20
#define WakeupQuit 0x40
#define WakeupEOF 0x80 /* used in VTIME control */
#define WakeupRxTrigger 0x100
#define WakeupTxTrigger 0x200
/*
* Flag status
*/
#define Rx_over 0x01
#define Xoff_state 0x02
#define Tx_flowOff 0x04
#define Tx_enable 0x08
#define CTS_state 0x10
#define DSR_state 0x20
#define DCD_state 0x80
/*
* FlowControl
*/
#define CTS_FlowCtl 1
#define RTS_FlowCtl 2
#define Tx_FlowCtl 4
#define Rx_FlowCtl 8
#define IXM_IXANY 0x10
#define LowWater 128
#define DTR_ON 1
#define RTS_ON 2
#define CTS_ON 1
#define DSR_ON 2
#define DCD_ON 8
/* mode definition */
#define MX_CS8 0x03
#define MX_CS7 0x02
#define MX_CS6 0x01
#define MX_CS5 0x00
#define MX_STOP1 0x00
#define MX_STOP15 0x04
#define MX_STOP2 0x08
#define MX_PARNONE 0x00
#define MX_PAREVEN 0x40
#define MX_PARODD 0xC0
/*
* Query
*/
struct mon_str {
int tick;
int rxcnt[MAX_PORTS];
int txcnt[MAX_PORTS];
};
#define DCD_changed 0x01
#define DCD_oldstate 0x80
static unsigned char moxaBuff[10240];
static int moxaLowWaterChk;
static int moxaCard;
static struct mon_str moxaLog;
static int moxaFuncTout = HZ / 2;
static void moxadelay(int);
static void moxafunc(void __iomem *, int, ushort);
static void wait_finish(void __iomem *);
static void low_water_check(void __iomem *);
static int moxaloadbios(int, unsigned char __user *, int);
static int moxafindcard(int);
static int moxaload320b(int, unsigned char __user *, int);
static int moxaloadcode(int, unsigned char __user *, int);
static int moxaloadc218(int, void __iomem *, int);
static int moxaloadc320(int, void __iomem *, int, int *);
/*****************************************************************************
* Driver level functions: *
* 1. MoxaDriverInit(void); *
* 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); *
* 3. MoxaDriverPoll(void); *
*****************************************************************************/
void MoxaDriverInit(void)
{
struct moxa_port *p;
unsigned int i;
moxaFuncTout = HZ / 2; /* 500 mini-seconds */
moxaCard = 0;
moxaLog.tick = 0;
moxaLowWaterChk = 0;
for (i = 0; i < MAX_PORTS; i++) {
p = &moxa_ports[i];
p->chkPort = 0;
p->lowChkFlag = 0;
p->lineCtrl = 0;
moxaLog.rxcnt[i] = 0;
moxaLog.txcnt[i] = 0;
}
}
#define MOXA 0x400
#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
#define MOXA_INIT_DRIVER (MOXA + 6) /* moxaCard=0 */
#define MOXA_LOAD_BIOS (MOXA + 9) /* download BIOS */
#define MOXA_FIND_BOARD (MOXA + 10) /* Check if MOXA card exist? */
#define MOXA_LOAD_C320B (MOXA + 11) /* download 320B firmware */
#define MOXA_LOAD_CODE (MOXA + 12) /* download firmware */
#define MOXA_GETDATACOUNT (MOXA + 23)
#define MOXA_GET_IOQUEUE (MOXA + 27)
#define MOXA_FLUSH_QUEUE (MOXA + 28)
#define MOXA_GET_CONF (MOXA + 35) /* configuration */
#define MOXA_GET_MAJOR (MOXA + 63)
#define MOXA_GET_CUMAJOR (MOXA + 64)
#define MOXA_GETMSTATUS (MOXA + 65)
struct dl_str {
char __user *buf;
int len;
int cardno;
};
static struct dl_str dltmp;
void MoxaPortFlushData(int port, int mode)
{
void __iomem *ofsAddr;
if ((mode < 0) || (mode > 2))
return;
ofsAddr = moxa_ports[port].tableAddr;
moxafunc(ofsAddr, FC_FlushQueue, mode);
if (mode != 1) {
moxa_ports[port].lowChkFlag = 0;
low_water_check(ofsAddr);
}
}
int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port)
{
int i;
int status;
int MoxaPortTxQueue(int), MoxaPortRxQueue(int);
void __user *argp = (void __user *)arg;
if (port == MAX_PORTS) {
if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_INIT_DRIVER) &&
(cmd != MOXA_LOAD_BIOS) && (cmd != MOXA_FIND_BOARD) && (cmd != MOXA_LOAD_C320B) &&
(cmd != MOXA_LOAD_CODE) && (cmd != MOXA_GETDATACOUNT) &&
(cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
(cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
return (-EINVAL);
}
switch (cmd) {
case MOXA_GET_CONF:
if(copy_to_user(argp, &moxa_boards, MAX_BOARDS *
sizeof(struct moxa_board_conf)))
return -EFAULT;
return (0);
case MOXA_INIT_DRIVER:
if ((int) arg == 0x404)
MoxaDriverInit();
return (0);
case MOXA_GETDATACOUNT:
moxaLog.tick = jiffies;
if(copy_to_user(argp, &moxaLog, sizeof(struct mon_str)))
return -EFAULT;
return (0);
case MOXA_FLUSH_QUEUE:
MoxaPortFlushData(port, arg);
return (0);
case MOXA_GET_IOQUEUE: {
struct moxaq_str __user *argm = argp;
struct moxaq_str tmp;
for (i = 0; i < MAX_PORTS; i++, argm++) {
memset(&tmp, 0, sizeof(tmp));
if (moxa_ports[i].chkPort) {
tmp.inq = MoxaPortRxQueue(i);
tmp.outq = MoxaPortTxQueue(i);
}
if (copy_to_user(argm, &tmp, sizeof(tmp)))
return -EFAULT;
}
return (0);
} case MOXA_GET_OQUEUE:
i = MoxaPortTxQueue(port);
return put_user(i, (unsigned long __user *)argp);
case MOXA_GET_IQUEUE:
i = MoxaPortRxQueue(port);
return put_user(i, (unsigned long __user *)argp);
case MOXA_GET_MAJOR:
if(copy_to_user(argp, &ttymajor, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_GET_CUMAJOR:
i = 0;
if(copy_to_user(argp, &i, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_GETMSTATUS: {
struct mxser_mstatus __user *argm = argp;
struct mxser_mstatus tmp;
struct moxa_port *p;
for (i = 0; i < MAX_PORTS; i++, argm++) {
p = &moxa_ports[i];
memset(&tmp, 0, sizeof(tmp));
if (!p->chkPort) {
goto copy;
} else {
status = MoxaPortLineStatus(p->port);
if (status & 1)
tmp.cts = 1;
if (status & 2)
tmp.dsr = 1;
if (status & 4)
tmp.dcd = 1;
}
if (!p->tty || !p->tty->termios)
tmp.cflag = p->cflag;
else
tmp.cflag = p->tty->termios->c_cflag;
copy:
if (copy_to_user(argm, &tmp, sizeof(tmp)))
return -EFAULT;
}
return 0;
} default:
return (-ENOIOCTLCMD);
case MOXA_LOAD_BIOS:
case MOXA_FIND_BOARD:
case MOXA_LOAD_C320B:
case MOXA_LOAD_CODE:
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
break;
}
if(copy_from_user(&dltmp, argp, sizeof(struct dl_str)))
return -EFAULT;
if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS || dltmp.len < 0)
return -EINVAL;
switch(cmd)
{
case MOXA_LOAD_BIOS:
i = moxaloadbios(dltmp.cardno, dltmp.buf, dltmp.len);
return (i);
case MOXA_FIND_BOARD:
return moxafindcard(dltmp.cardno);
case MOXA_LOAD_C320B:
moxaload320b(dltmp.cardno, dltmp.buf, dltmp.len);
default: /* to keep gcc happy */
return (0);
case MOXA_LOAD_CODE:
i = moxaloadcode(dltmp.cardno, dltmp.buf, dltmp.len);
if (i == -1)
return (-EFAULT);
return (i);
}
}
int MoxaDriverPoll(void)
{
struct moxa_board_conf *brd;
register ushort temp;
register int card;
void __iomem *ofsAddr;
void __iomem *ip;
int port, p, ports;
if (moxaCard == 0)
return (-1);
for (card = 0; card < MAX_BOARDS; card++) {
brd = &moxa_boards[card];
if (brd->loadstat == 0)
continue;
if ((ports = brd->numPorts) == 0)
continue;
if (readb(brd->intPend) == 0xff) {
ip = brd->intTable + readb(brd->intNdx);
p = card * MAX_PORTS_PER_BOARD;
ports <<= 1;
for (port = 0; port < ports; port += 2, p++) {
if ((temp = readw(ip + port)) != 0) {
writew(0, ip + port);
ofsAddr = moxa_ports[p].tableAddr;
if (temp & IntrTx)
writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat);
if (temp & IntrBreak) {
moxa_ports[p].breakCnt++;
}
if (temp & IntrLine) {
if (readb(ofsAddr + FlagStat) & DCD_state) {
if ((moxa_ports[p].DCDState & DCD_oldstate) == 0)
moxa_ports[p].DCDState = (DCD_oldstate |
DCD_changed);
} else {
if (moxa_ports[p].DCDState & DCD_oldstate)
moxa_ports[p].DCDState = DCD_changed;
}
}
}
}
writeb(0, brd->intPend);
}
if (moxaLowWaterChk) {
p = card * MAX_PORTS_PER_BOARD;
for (port = 0; port < ports; port++, p++) {
if (moxa_ports[p].lowChkFlag) {
moxa_ports[p].lowChkFlag = 0;
ofsAddr = moxa_ports[p].tableAddr;
low_water_check(ofsAddr);
}
}
}
}
moxaLowWaterChk = 0;
return (0);
}
/*****************************************************************************
* Card level function: *
* 1. MoxaPortsOfCard(int cardno); *
*****************************************************************************/
int MoxaPortsOfCard(int cardno)
{
if (moxa_boards[cardno].boardType == 0)
return (0);
return (moxa_boards[cardno].numPorts);
}
/*****************************************************************************
* Port level functions: *
* 1. MoxaPortIsValid(int port); *
* 2. MoxaPortEnable(int port); *
* 3. MoxaPortDisable(int port); *
* 4. MoxaPortGetMaxBaud(int port); *
* 6. MoxaPortSetBaud(int port, long baud); *
* 8. MoxaPortSetTermio(int port, unsigned char *termio); *
* 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
* 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
* 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
* 12. MoxaPortLineStatus(int port); *
* 13. MoxaPortDCDChange(int port); *
* 14. MoxaPortDCDON(int port); *
* 15. MoxaPortFlushData(int port, int mode); *
* 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
* 17. MoxaPortReadData(int port, struct tty_struct *tty); *
* 20. MoxaPortTxQueue(int port); *
* 21. MoxaPortTxFree(int port); *
* 22. MoxaPortRxQueue(int port); *
* 24. MoxaPortTxDisable(int port); *
* 25. MoxaPortTxEnable(int port); *
* 27. MoxaPortResetBrkCnt(int port); *
* 30. MoxaPortSendBreak(int port, int ticks); *
*****************************************************************************/
/*
* Moxa Port Number Description:
*
* MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
* the port number using in MOXA driver functions will be 0 to 31 for
* first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
* to 127 for fourth. For example, if you setup three MOXA boards,
* first board is C218, second board is C320-16 and third board is
* C320-32. The port number of first board (C218 - 8 ports) is from
* 0 to 7. The port number of second board (C320 - 16 ports) is form
* 32 to 47. The port number of third board (C320 - 32 ports) is from
* 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
* 127 will be invalid.
*
*
* Moxa Functions Description:
*
* Function 1: Driver initialization routine, this routine must be
* called when initialized driver.
* Syntax:
* void MoxaDriverInit();
*
*
* Function 2: Moxa driver private IOCTL command processing.
* Syntax:
* int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
*
* unsigned int cmd : IOCTL command
* unsigned long arg : IOCTL argument
* int port : port number (0 - 127)
*
* return: 0 (OK)
* -EINVAL
* -ENOIOCTLCMD
*
*
* Function 3: Moxa driver polling process routine.
* Syntax:
* int MoxaDriverPoll(void);
*
* return: 0 ; polling O.K.
* -1 : no any Moxa card.
*
*
* Function 4: Get the ports of this card.
* Syntax:
* int MoxaPortsOfCard(int cardno);
*
* int cardno : card number (0 - 3)
*
* return: 0 : this card is invalid
* 8/16/24/32
*
*
* Function 5: Check this port is valid or invalid
* Syntax:
* int MoxaPortIsValid(int port);
* int port : port number (0 - 127, ref port description)
*
* return: 0 : this port is invalid
* 1 : this port is valid
*
*
* Function 6: Enable this port to start Tx/Rx data.
* Syntax:
* void MoxaPortEnable(int port);
* int port : port number (0 - 127)
*
*
* Function 7: Disable this port
* Syntax:
* void MoxaPortDisable(int port);
* int port : port number (0 - 127)
*
*
* Function 8: Get the maximun available baud rate of this port.
* Syntax:
* long MoxaPortGetMaxBaud(int port);
* int port : port number (0 - 127)
*
* return: 0 : this port is invalid
* 38400/57600/115200 bps
*
*
* Function 10: Setting baud rate of this port.
* Syntax:
* long MoxaPortSetBaud(int port, long baud);
* int port : port number (0 - 127)
* long baud : baud rate (50 - 115200)
*
* return: 0 : this port is invalid or baud < 50
* 50 - 115200 : the real baud rate set to the port, if
* the argument baud is large than maximun
* available baud rate, the real setting
* baud rate will be the maximun baud rate.
*
*
* Function 12: Configure the port.
* Syntax:
* int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
* int port : port number (0 - 127)
* struct ktermios * termio : termio structure pointer
* speed_t baud : baud rate
*
* return: -1 : this port is invalid or termio == NULL
* 0 : setting O.K.
*
*
* Function 13: Get the DTR/RTS state of this port.
* Syntax:
* int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
* int port : port number (0 - 127)
* int * dtrState : pointer to INT to receive the current DTR
* state. (if NULL, this function will not
* write to this address)
* int * rtsState : pointer to INT to receive the current RTS
* state. (if NULL, this function will not
* write to this address)
*
* return: -1 : this port is invalid
* 0 : O.K.
*
*
* Function 14: Setting the DTR/RTS output state of this port.
* Syntax:
* void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
* int port : port number (0 - 127)
* int dtrState : DTR output state (0: off, 1: on)
* int rtsState : RTS output state (0: off, 1: on)
*
*
* Function 15: Setting the flow control of this port.
* Syntax:
* void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
* int txFlow,int xany);
* int port : port number (0 - 127)
* int rtsFlow : H/W RTS flow control (0: no, 1: yes)
* int ctsFlow : H/W CTS flow control (0: no, 1: yes)
* int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
* int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
* int xany : S/W XANY flow control (0: no, 1: yes)
*
*
* Function 16: Get ths line status of this port
* Syntax:
* int MoxaPortLineStatus(int port);
* int port : port number (0 - 127)
*
* return: Bit 0 - CTS state (0: off, 1: on)
* Bit 1 - DSR state (0: off, 1: on)
* Bit 2 - DCD state (0: off, 1: on)
*
*
* Function 17: Check the DCD state has changed since the last read
* of this function.
* Syntax:
* int MoxaPortDCDChange(int port);
* int port : port number (0 - 127)
*
* return: 0 : no changed
* 1 : DCD has changed
*
*
* Function 18: Check ths current DCD state is ON or not.
* Syntax:
* int MoxaPortDCDON(int port);
* int port : port number (0 - 127)
*
* return: 0 : DCD off
* 1 : DCD on
*
*
* Function 19: Flush the Rx/Tx buffer data of this port.
* Syntax:
* void MoxaPortFlushData(int port, int mode);
* int port : port number (0 - 127)
* int mode
* 0 : flush the Rx buffer
* 1 : flush the Tx buffer
* 2 : flush the Rx and Tx buffer
*
*
* Function 20: Write data.
* Syntax:
* int MoxaPortWriteData(int port, unsigned char * buffer, int length);
* int port : port number (0 - 127)
* unsigned char * buffer : pointer to write data buffer.
* int length : write data length
*
* return: 0 - length : real write data length
*
*
* Function 21: Read data.
* Syntax:
* int MoxaPortReadData(int port, struct tty_struct *tty);
* int port : port number (0 - 127)
* struct tty_struct *tty : tty for data
*
* return: 0 - length : real read data length
*
*
* Function 24: Get the Tx buffer current queued data bytes
* Syntax:
* int MoxaPortTxQueue(int port);
* int port : port number (0 - 127)
*
* return: .. : Tx buffer current queued data bytes
*
*
* Function 25: Get the Tx buffer current free space
* Syntax:
* int MoxaPortTxFree(int port);
* int port : port number (0 - 127)
*
* return: .. : Tx buffer current free space
*
*
* Function 26: Get the Rx buffer current queued data bytes
* Syntax:
* int MoxaPortRxQueue(int port);
* int port : port number (0 - 127)
*
* return: .. : Rx buffer current queued data bytes
*
*
* Function 28: Disable port data transmission.
* Syntax:
* void MoxaPortTxDisable(int port);
* int port : port number (0 - 127)
*
*
* Function 29: Enable port data transmission.
* Syntax:
* void MoxaPortTxEnable(int port);
* int port : port number (0 - 127)
*
*
* Function 31: Get the received BREAK signal count and reset it.
* Syntax:
* int MoxaPortResetBrkCnt(int port);
* int port : port number (0 - 127)
*
* return: 0 - .. : BREAK signal count
*
*
* Function 34: Send out a BREAK signal.
* Syntax:
* void MoxaPortSendBreak(int port, int ms100);
* int port : port number (0 - 127)
* int ms100 : break signal time interval.
* unit: 100 mini-second. if ms100 == 0, it will
* send out a about 250 ms BREAK signal.
*
*/
int MoxaPortIsValid(int port)
{
if (moxaCard == 0)
return (0);
if (moxa_ports[port].chkPort == 0)
return (0);
return (1);
}
void MoxaPortEnable(int port)
{
void __iomem *ofsAddr;
int MoxaPortLineStatus(int);
short lowwater = 512;
ofsAddr = moxa_ports[port].tableAddr;
writew(lowwater, ofsAddr + Low_water);
moxa_ports[port].breakCnt = 0;
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
moxafunc(ofsAddr, FC_SetBreakIrq, 0);
} else {
writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
}
moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
moxafunc(ofsAddr, FC_FlushQueue, 2);
moxafunc(ofsAddr, FC_EnableCH, Magic_code);
MoxaPortLineStatus(port);
}
void MoxaPortDisable(int port)
{
void __iomem *ofsAddr = moxa_ports[port].tableAddr;
moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
writew(0, ofsAddr + HostStat);
moxafunc(ofsAddr, FC_DisableCH, Magic_code);
}
long MoxaPortGetMaxBaud(int port)
{
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI))
return (460800L);
else
return (921600L);
}
long MoxaPortSetBaud(int port, long baud)
{
void __iomem *ofsAddr;
long max, clock;
unsigned int val;
if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
return (0);
ofsAddr = moxa_ports[port].tableAddr;
if (baud > max)
baud = max;
if (max == 38400L)
clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
else if (max == 57600L)
clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
else
clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
val = clock / baud;
moxafunc(ofsAddr, FC_SetBaud, val);
baud = clock / val;
moxa_ports[port].curBaud = baud;
return (baud);
}
int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud)
{
void __iomem *ofsAddr;
tcflag_t cflag;
tcflag_t mode = 0;
if (moxa_ports[port].chkPort == 0 || termio == 0)
return (-1);
ofsAddr = moxa_ports[port].tableAddr;
cflag = termio->c_cflag; /* termio->c_cflag */
mode = termio->c_cflag & CSIZE;
if (mode == CS5)
mode = MX_CS5;
else if (mode == CS6)
mode = MX_CS6;
else if (mode == CS7)
mode = MX_CS7;
else if (mode == CS8)
mode = MX_CS8;
if (termio->c_cflag & CSTOPB) {
if (mode == MX_CS5)
mode |= MX_STOP15;
else
mode |= MX_STOP2;
} else
mode |= MX_STOP1;
if (termio->c_cflag & PARENB) {
if (termio->c_cflag & PARODD)
mode |= MX_PARODD;
else
mode |= MX_PAREVEN;
} else
mode |= MX_PARNONE;
moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
if (baud >= 921600L)
return (-1);
}
MoxaPortSetBaud(port, baud);
if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
writeb(FC_SetXonXoff, ofsAddr + FuncCode);
wait_finish(ofsAddr);
}
return (0);
}
int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState)
{
if (!MoxaPortIsValid(port))
return (-1);
if (dtrState) {
if (moxa_ports[port].lineCtrl & DTR_ON)
*dtrState = 1;
else
*dtrState = 0;
}
if (rtsState) {
if (moxa_ports[port].lineCtrl & RTS_ON)
*rtsState = 1;
else
*rtsState = 0;
}
return (0);
}
void MoxaPortLineCtrl(int port, int dtr, int rts)
{
void __iomem *ofsAddr;
int mode;
ofsAddr = moxa_ports[port].tableAddr;
mode = 0;
if (dtr)
mode |= DTR_ON;
if (rts)
mode |= RTS_ON;
moxa_ports[port].lineCtrl = mode;
moxafunc(ofsAddr, FC_LineControl, mode);
}
void MoxaPortFlowCtrl(int port, int rts, int cts, int txflow, int rxflow, int txany)
{
void __iomem *ofsAddr;
int mode;
ofsAddr = moxa_ports[port].tableAddr;
mode = 0;
if (rts)
mode |= RTS_FlowCtl;
if (cts)
mode |= CTS_FlowCtl;
if (txflow)
mode |= Tx_FlowCtl;
if (rxflow)
mode |= Rx_FlowCtl;
if (txany)
mode |= IXM_IXANY;
moxafunc(ofsAddr, FC_SetFlowCtl, mode);
}
int MoxaPortLineStatus(int port)
{
void __iomem *ofsAddr;
int val;
ofsAddr = moxa_ports[port].tableAddr;
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
moxafunc(ofsAddr, FC_LineStatus, 0);
val = readw(ofsAddr + FuncArg);
} else {
val = readw(ofsAddr + FlagStat) >> 4;
}
val &= 0x0B;
if (val & 8) {
val |= 4;
if ((moxa_ports[port].DCDState & DCD_oldstate) == 0)
moxa_ports[port].DCDState = (DCD_oldstate | DCD_changed);
} else {
if (moxa_ports[port].DCDState & DCD_oldstate)
moxa_ports[port].DCDState = DCD_changed;
}
val &= 7;
return (val);
}
int MoxaPortDCDChange(int port)
{
int n;
if (moxa_ports[port].chkPort == 0)
return (0);
n = moxa_ports[port].DCDState;
moxa_ports[port].DCDState &= ~DCD_changed;
n &= DCD_changed;
return (n);
}
int MoxaPortDCDON(int port)
{
int n;
if (moxa_ports[port].chkPort == 0)
return (0);
if (moxa_ports[port].DCDState & DCD_oldstate)
n = 1;
else
n = 0;
return (n);
}
int MoxaPortWriteData(int port, unsigned char * buffer, int len)
{
int c, total, i;
ushort tail;
int cnt;
ushort head, tx_mask, spage, epage;
ushort pageno, pageofs, bufhead;
void __iomem *baseAddr, *ofsAddr, *ofs;
ofsAddr = moxa_ports[port].tableAddr;
baseAddr = moxa_boards[port / MAX_PORTS_PER_BOARD].basemem;
tx_mask = readw(ofsAddr + TX_mask);
spage = readw(ofsAddr + Page_txb);
epage = readw(ofsAddr + EndPage_txb);
tail = readw(ofsAddr + TXwptr);
head = readw(ofsAddr + TXrptr);
c = (head > tail) ? (head - tail - 1)
: (head - tail + tx_mask);
if (c > len)
c = len;
moxaLog.txcnt[port] += c;
total = c;
if (spage == epage) {
bufhead = readw(ofsAddr + Ofs_txb);
writew(spage, baseAddr + Control_reg);
while (c > 0) {
if (head > tail)
len = head - tail - 1;
else
len = tx_mask + 1 - tail;
len = (c > len) ? len : c;
ofs = baseAddr + DynPage_addr + bufhead + tail;
for (i = 0; i < len; i++)
writeb(*buffer++, ofs + i);
tail = (tail + len) & tx_mask;
c -= len;
}
writew(tail, ofsAddr + TXwptr);
} else {
len = c;
pageno = spage + (tail >> 13);
pageofs = tail & Page_mask;
do {
cnt = Page_size - pageofs;
if (cnt > c)
cnt = c;
c -= cnt;
writeb(pageno, baseAddr + Control_reg);
ofs = baseAddr + DynPage_addr + pageofs;
for (i = 0; i < cnt; i++)
writeb(*buffer++, ofs + i);
if (c == 0) {
writew((tail + len) & tx_mask, ofsAddr + TXwptr);
break;
}
if (++pageno == epage)
pageno = spage;
pageofs = 0;
} while (1);
}
writeb(1, ofsAddr + CD180TXirq); /* start to send */
return (total);
}
int MoxaPortReadData(int port, struct tty_struct *tty)
{
register ushort head, pageofs;
int i, count, cnt, len, total, remain;
ushort tail, rx_mask, spage, epage;
ushort pageno, bufhead;
void __iomem *baseAddr, *ofsAddr, *ofs;
ofsAddr = moxa_ports[port].tableAddr;
baseAddr = moxa_boards[port / MAX_PORTS_PER_BOARD].basemem;
head = readw(ofsAddr + RXrptr);
tail = readw(ofsAddr + RXwptr);
rx_mask = readw(ofsAddr + RX_mask);
spage = readw(ofsAddr + Page_rxb);
epage = readw(ofsAddr + EndPage_rxb);
count = (tail >= head) ? (tail - head)
: (tail - head + rx_mask + 1);
if (count == 0)
return 0;
total = count;
remain = count - total;
moxaLog.rxcnt[port] += total;
count = total;
if (spage == epage) {
bufhead = readw(ofsAddr + Ofs_rxb);
writew(spage, baseAddr + Control_reg);
while (count > 0) {
if (tail >= head)
len = tail - head;
else
len = rx_mask + 1 - head;
len = (count > len) ? len : count;
ofs = baseAddr + DynPage_addr + bufhead + head;
for (i = 0; i < len; i++)
tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
head = (head + len) & rx_mask;
count -= len;
}
writew(head, ofsAddr + RXrptr);
} else {
len = count;
pageno = spage + (head >> 13);
pageofs = head & Page_mask;
do {
cnt = Page_size - pageofs;
if (cnt > count)
cnt = count;
count -= cnt;
writew(pageno, baseAddr + Control_reg);
ofs = baseAddr + DynPage_addr + pageofs;
for (i = 0; i < cnt; i++)
tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
if (count == 0) {
writew((head + len) & rx_mask, ofsAddr + RXrptr);
break;
}
if (++pageno == epage)
pageno = spage;
pageofs = 0;
} while (1);
}
if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) {
moxaLowWaterChk = 1;
moxa_ports[port].lowChkFlag = 1;
}
return (total);
}
int MoxaPortTxQueue(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxa_ports[port].tableAddr;
rptr = readw(ofsAddr + TXrptr);
wptr = readw(ofsAddr + TXwptr);
mask = readw(ofsAddr + TX_mask);
len = (wptr - rptr) & mask;
return (len);
}
int MoxaPortTxFree(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxa_ports[port].tableAddr;
rptr = readw(ofsAddr + TXrptr);
wptr = readw(ofsAddr + TXwptr);
mask = readw(ofsAddr + TX_mask);
len = mask - ((wptr - rptr) & mask);
return (len);
}
int MoxaPortRxQueue(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxa_ports[port].tableAddr;
rptr = readw(ofsAddr + RXrptr);
wptr = readw(ofsAddr + RXwptr);
mask = readw(ofsAddr + RX_mask);
len = (wptr - rptr) & mask;
return (len);
}
void MoxaPortTxDisable(int port)
{
void __iomem *ofsAddr;
ofsAddr = moxa_ports[port].tableAddr;
moxafunc(ofsAddr, FC_SetXoffState, Magic_code);
}
void MoxaPortTxEnable(int port)
{
void __iomem *ofsAddr;
ofsAddr = moxa_ports[port].tableAddr;
moxafunc(ofsAddr, FC_SetXonState, Magic_code);
}
int MoxaPortResetBrkCnt(int port)
{
ushort cnt;
cnt = moxa_ports[port].breakCnt;
moxa_ports[port].breakCnt = 0;
return (cnt);
}
void MoxaPortSendBreak(int port, int ms100)
{
void __iomem *ofsAddr;
ofsAddr = moxa_ports[port].tableAddr;
if (ms100) {
moxafunc(ofsAddr, FC_SendBreak, Magic_code);
moxadelay(ms100 * (HZ / 10));
} else {
moxafunc(ofsAddr, FC_SendBreak, Magic_code);
moxadelay(HZ / 4); /* 250 ms */
}
moxafunc(ofsAddr, FC_StopBreak, Magic_code);
}
static int moxa_get_serial_info(struct moxa_port *info,
struct serial_struct __user *retinfo)
{
struct serial_struct tmp;
memset(&tmp, 0, sizeof(tmp));
tmp.type = info->type;
tmp.line = info->port;
tmp.port = 0;
tmp.irq = 0;
tmp.flags = info->asyncflags;
tmp.baud_base = 921600;
tmp.close_delay = info->close_delay;
tmp.closing_wait = info->closing_wait;
tmp.custom_divisor = 0;
tmp.hub6 = 0;
if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return (0);
}
static int moxa_set_serial_info(struct moxa_port *info,
struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
if ((new_serial.irq != 0) ||
(new_serial.port != 0) ||
// (new_serial.type != info->type) ||
(new_serial.custom_divisor != 0) ||
(new_serial.baud_base != 921600))
return (-EPERM);
if (!capable(CAP_SYS_ADMIN)) {
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
(info->asyncflags & ~ASYNC_USR_MASK)))
return (-EPERM);
} else {
info->close_delay = new_serial.close_delay * HZ / 100;
info->closing_wait = new_serial.closing_wait * HZ / 100;
}
new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
if (new_serial.type == PORT_16550A) {
MoxaSetFifo(info->port, 1);
} else {
MoxaSetFifo(info->port, 0);
}
info->type = new_serial.type;
return (0);
}
/*****************************************************************************
* Static local functions: *
*****************************************************************************/
/*
* moxadelay - delays a specified number ticks
*/
static void moxadelay(int tick)
{
unsigned long st, et;
st = jiffies;
et = st + tick;
while (time_before(jiffies, et));
}
static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
{
writew(arg, ofsAddr + FuncArg);
writew(cmd, ofsAddr + FuncCode);
wait_finish(ofsAddr);
}
static void wait_finish(void __iomem *ofsAddr)
{
unsigned long i, j;
i = jiffies;
while (readw(ofsAddr + FuncCode) != 0) {
j = jiffies;
if ((j - i) > moxaFuncTout) {
return;
}
}
}
static void low_water_check(void __iomem *ofsAddr)
{
int len;
ushort rptr, wptr, mask;
if (readb(ofsAddr + FlagStat) & Xoff_state) {
rptr = readw(ofsAddr + RXrptr);
wptr = readw(ofsAddr + RXwptr);
mask = readw(ofsAddr + RX_mask);
len = (wptr - rptr) & mask;
if (len <= Low_water)
moxafunc(ofsAddr, FC_SendXon, 0);
}
}
static int moxaloadbios(int cardno, unsigned char __user *tmp, int len)
{
void __iomem *baseAddr;
int i;
if(len < 0 || len > sizeof(moxaBuff))
return -EINVAL;
if(copy_from_user(moxaBuff, tmp, len))
return -EFAULT;
baseAddr = moxa_boards[cardno].basemem;
writeb(HW_reset, baseAddr + Control_reg); /* reset */
moxadelay(1); /* delay 10 ms */
for (i = 0; i < 4096; i++)
writeb(0, baseAddr + i); /* clear fix page */
for (i = 0; i < len; i++)
writeb(moxaBuff[i], baseAddr + i); /* download BIOS */
writeb(0, baseAddr + Control_reg); /* restart */
return (0);
}
static int moxafindcard(int cardno)
{
void __iomem *baseAddr;
ushort tmp;
baseAddr = moxa_boards[cardno].basemem;
switch (moxa_boards[cardno].boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
if ((tmp = readw(baseAddr + C218_key)) != C218_KeyCode) {
return (-1);
}
break;
case MOXA_BOARD_CP204J:
if ((tmp = readw(baseAddr + C218_key)) != CP204J_KeyCode) {
return (-1);
}
break;
default:
if ((tmp = readw(baseAddr + C320_key)) != C320_KeyCode) {
return (-1);
}
if ((tmp = readw(baseAddr + C320_status)) != STS_init) {
return (-2);
}
}
return (0);
}
static int moxaload320b(int cardno, unsigned char __user *tmp, int len)
{
void __iomem *baseAddr;
int i;
if(len < 0 || len > sizeof(moxaBuff))
return -EINVAL;
if(copy_from_user(moxaBuff, tmp, len))
return -EFAULT;
baseAddr = moxa_boards[cardno].basemem;
writew(len - 7168 - 2, baseAddr + C320bapi_len);
writeb(1, baseAddr + Control_reg); /* Select Page 1 */
for (i = 0; i < 7168; i++)
writeb(moxaBuff[i], baseAddr + DynPage_addr + i);
writeb(2, baseAddr + Control_reg); /* Select Page 2 */
for (i = 0; i < (len - 7168); i++)
writeb(moxaBuff[i + 7168], baseAddr + DynPage_addr + i);
return (0);
}
static int moxaloadcode(int cardno, unsigned char __user *tmp, int len)
{
void __iomem *baseAddr, *ofsAddr;
int retval, port, i;
if(len < 0 || len > sizeof(moxaBuff))
return -EINVAL;
if(copy_from_user(moxaBuff, tmp, len))
return -EFAULT;
baseAddr = moxa_boards[cardno].basemem;
switch (moxa_boards[cardno].boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
case MOXA_BOARD_CP204J:
retval = moxaloadc218(cardno, baseAddr, len);
if (retval)
return (retval);
port = cardno * MAX_PORTS_PER_BOARD;
for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
struct moxa_port *p = &moxa_ports[port];
p->chkPort = 1;
p->curBaud = 9600L;
p->DCDState = 0;
p->tableAddr = baseAddr + Extern_table + Extern_size * i;
ofsAddr = p->tableAddr;
writew(C218rx_mask, ofsAddr + RX_mask);
writew(C218tx_mask, ofsAddr + TX_mask);
writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
}
break;
default:
retval = moxaloadc320(cardno, baseAddr, len,
&moxa_boards[cardno].numPorts);
if (retval)
return (retval);
port = cardno * MAX_PORTS_PER_BOARD;
for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
struct moxa_port *p = &moxa_ports[port];
p->chkPort = 1;
p->curBaud = 9600L;
p->DCDState = 0;
p->tableAddr = baseAddr + Extern_table + Extern_size * i;
ofsAddr = p->tableAddr;
if (moxa_boards[cardno].numPorts == 8) {
writew(C320p8rx_mask, ofsAddr + RX_mask);
writew(C320p8tx_mask, ofsAddr + TX_mask);
writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
} else if (moxa_boards[cardno].numPorts == 16) {
writew(C320p16rx_mask, ofsAddr + RX_mask);
writew(C320p16tx_mask, ofsAddr + TX_mask);
writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
} else if (moxa_boards[cardno].numPorts == 24) {
writew(C320p24rx_mask, ofsAddr + RX_mask);
writew(C320p24tx_mask, ofsAddr + TX_mask);
writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
} else if (moxa_boards[cardno].numPorts == 32) {
writew(C320p32rx_mask, ofsAddr + RX_mask);
writew(C320p32tx_mask, ofsAddr + TX_mask);
writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
}
}
break;
}
moxa_boards[cardno].loadstat = 1;
return (0);
}
static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
{
char retry;
int i, j, len1, len2;
ushort usum, *ptr, keycode;
if (moxa_boards[cardno].boardType == MOXA_BOARD_CP204J)
keycode = CP204J_KeyCode;
else
keycode = C218_KeyCode;
usum = 0;
len1 = len >> 1;
ptr = (ushort *) moxaBuff;
for (i = 0; i < len1; i++)
usum += le16_to_cpu(*(ptr + i));
retry = 0;
do {
len1 = len >> 1;
j = 0;
while (len1) {
len2 = (len1 > 2048) ? 2048 : len1;
len1 -= len2;
for (i = 0; i < len2 << 1; i++)
writeb(moxaBuff[i + j], baseAddr + C218_LoadBuf + i);
j += i;
writew(len2, baseAddr + C218DLoad_len);
writew(0, baseAddr + C218_key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + C218_key) == keycode)
break;
moxadelay(1); /* delay 10 ms */
}
if (readw(baseAddr + C218_key) != keycode) {
return (-1);
}
}
writew(0, baseAddr + C218DLoad_len);
writew(usum, baseAddr + C218check_sum);
writew(0, baseAddr + C218_key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + C218_key) == keycode)
break;
moxadelay(1); /* delay 10 ms */
}
retry++;
} while ((readb(baseAddr + C218chksum_ok) != 1) && (retry < 3));
if (readb(baseAddr + C218chksum_ok) != 1) {
return (-1);
}
writew(0, baseAddr + C218_key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1); /* delay 10 ms */
}
if (readw(baseAddr + Magic_no) != Magic_code) {
return (-1);
}
writew(1, baseAddr + Disable_IRQ);
writew(0, baseAddr + Magic_no);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1); /* delay 10 ms */
}
if (readw(baseAddr + Magic_no) != Magic_code) {
return (-1);
}
moxaCard = 1;
moxa_boards[cardno].intNdx = baseAddr + IRQindex;
moxa_boards[cardno].intPend = baseAddr + IRQpending;
moxa_boards[cardno].intTable = baseAddr + IRQtable;
return (0);
}
static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPorts)
{
ushort usum;
int i, j, wlen, len2, retry;
ushort *uptr;
usum = 0;
wlen = len >> 1;
uptr = (ushort *) moxaBuff;
for (i = 0; i < wlen; i++)
usum += le16_to_cpu(uptr[i]);
retry = 0;
j = 0;
do {
while (wlen) {
if (wlen > 2048)
len2 = 2048;
else
len2 = wlen;
wlen -= len2;
len2 <<= 1;
for (i = 0; i < len2; i++)
writeb(moxaBuff[j + i], baseAddr + C320_LoadBuf + i);
len2 >>= 1;
j += i;
writew(len2, baseAddr + C320DLoad_len);
writew(0, baseAddr + C320_key);
for (i = 0; i < 10; i++) {
if (readw(baseAddr + C320_key) == C320_KeyCode)
break;
moxadelay(1);
}
if (readw(baseAddr + C320_key) != C320_KeyCode)
return (-1);
}
writew(0, baseAddr + C320DLoad_len);
writew(usum, baseAddr + C320check_sum);
writew(0, baseAddr + C320_key);
for (i = 0; i < 10; i++) {
if (readw(baseAddr + C320_key) == C320_KeyCode)
break;
moxadelay(1);
}
retry++;
} while ((readb(baseAddr + C320chksum_ok) != 1) && (retry < 3));
if (readb(baseAddr + C320chksum_ok) != 1)
return (-1);
writew(0, baseAddr + C320_key);
for (i = 0; i < 600; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return (-100);
if (moxa_boards[cardno].busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
writew(0x3800, baseAddr + TMS320_PORT1);
writew(0x3900, baseAddr + TMS320_PORT2);
writew(28499, baseAddr + TMS320_CLOCK);
} else {
writew(0x3200, baseAddr + TMS320_PORT1);
writew(0x3400, baseAddr + TMS320_PORT2);
writew(19999, baseAddr + TMS320_CLOCK);
}
writew(1, baseAddr + Disable_IRQ);
writew(0, baseAddr + Magic_no);
for (i = 0; i < 500; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return (-102);
j = readw(baseAddr + Module_cnt);
if (j <= 0)
return (-101);
*numPorts = j * 8;
writew(j, baseAddr + Module_no);
writew(0, baseAddr + Magic_no);
for (i = 0; i < 600; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return (-102);
moxaCard = 1;
moxa_boards[cardno].intNdx = baseAddr + IRQindex;
moxa_boards[cardno].intPend = baseAddr + IRQpending;
moxa_boards[cardno].intTable = baseAddr + IRQtable;
return (0);
}
static void MoxaSetFifo(int port, int enable)
{
void __iomem *ofsAddr = moxa_ports[port].tableAddr;
if (!enable) {
moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
} else {
moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
}
}
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