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moxa.c
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moxa.c
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/*****************************************************************************/
/*
* moxa.c -- MOXA Intellio family multiport serial driver.
*
* Copyright (C) 1999-2000 Moxa Technologies ([email protected]).
* Copyright (c) 2007 Jiri Slaby <[email protected]>
*
* 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/firmware.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 <linux/slab.h>
#include <linux/ratelimit.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include "moxa.h"
#define MOXA_VERSION "6.0k"
#define MOXA_FW_HDRLEN 32
#define MOXAMAJOR 172
#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 MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
(brd)->boardType == MOXA_BOARD_C320_PCI)
/*
* 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_port;
static struct moxa_board_conf {
int boardType;
int numPorts;
int busType;
unsigned int ready;
struct moxa_port *ports;
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 {
struct tty_port port;
struct moxa_board_conf *board;
void __iomem *tableAddr;
int type;
int cflag;
unsigned long statusflags;
u8 DCDState; /* Protected by the port lock */
u8 lineCtrl;
u8 lowChkFlag;
};
struct mon_str {
int tick;
int rxcnt[MAX_PORTS];
int txcnt[MAX_PORTS];
};
/* statusflags */
#define TXSTOPPED 1
#define LOWWAIT 2
#define EMPTYWAIT 3
#define SERIAL_DO_RESTART
#define WAKEUP_CHARS 256
static int ttymajor = MOXAMAJOR;
static struct mon_str moxaLog;
static unsigned int moxaFuncTout = HZ / 2;
static unsigned int moxaLowWaterChk;
static DEFINE_MUTEX(moxa_openlock);
static DEFINE_SPINLOCK(moxa_lock);
static unsigned long baseaddr[MAX_BOARDS];
static unsigned int type[MAX_BOARDS];
static unsigned int numports[MAX_BOARDS];
MODULE_AUTHOR("William Chen");
MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("c218tunx.cod");
MODULE_FIRMWARE("cp204unx.cod");
MODULE_FIRMWARE("c320tunx.cod");
module_param_array(type, uint, NULL, 0);
MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
module_param_array(baseaddr, ulong, NULL, 0);
MODULE_PARM_DESC(baseaddr, "base address");
module_param_array(numports, uint, NULL, 0);
MODULE_PARM_DESC(numports, "numports (ignored for C218)");
module_param(ttymajor, int, 0);
/*
* 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_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);
static int moxa_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
static void moxa_poll(unsigned long);
static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
static void moxa_shutdown(struct tty_port *);
static int moxa_carrier_raised(struct tty_port *);
static void moxa_dtr_rts(struct tty_port *, int);
/*
* moxa board interface functions:
*/
static void MoxaPortEnable(struct moxa_port *);
static void MoxaPortDisable(struct moxa_port *);
static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
static void MoxaPortLineCtrl(struct moxa_port *, int, int);
static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
static int MoxaPortLineStatus(struct moxa_port *);
static void MoxaPortFlushData(struct moxa_port *, int);
static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
static int MoxaPortReadData(struct moxa_port *);
static int MoxaPortTxQueue(struct moxa_port *);
static int MoxaPortRxQueue(struct moxa_port *);
static int MoxaPortTxFree(struct moxa_port *);
static void MoxaPortTxDisable(struct moxa_port *);
static void MoxaPortTxEnable(struct moxa_port *);
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(struct moxa_port *port, int enable);
/*
* I/O functions
*/
static DEFINE_SPINLOCK(moxafunc_lock);
static void moxa_wait_finish(void __iomem *ofsAddr)
{
unsigned long end = jiffies + moxaFuncTout;
while (readw(ofsAddr + FuncCode) != 0)
if (time_after(jiffies, end))
return;
if (readw(ofsAddr + FuncCode) != 0)
printk_ratelimited(KERN_WARNING "moxa function expired\n");
}
static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
{
unsigned long flags;
spin_lock_irqsave(&moxafunc_lock, flags);
writew(arg, ofsAddr + FuncArg);
writew(cmd, ofsAddr + FuncCode);
moxa_wait_finish(ofsAddr);
spin_unlock_irqrestore(&moxafunc_lock, flags);
}
static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
{
unsigned long flags;
u16 ret;
spin_lock_irqsave(&moxafunc_lock, flags);
writew(arg, ofsAddr + FuncArg);
writew(cmd, ofsAddr + FuncCode);
moxa_wait_finish(ofsAddr);
ret = readw(ofsAddr + FuncArg);
spin_unlock_irqrestore(&moxafunc_lock, flags);
return ret;
}
static void moxa_low_water_check(void __iomem *ofsAddr)
{
u16 rptr, wptr, mask, len;
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);
}
}
/*
* TTY operations
*/
static int moxa_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
struct moxa_port *ch = tty->driver_data;
void __user *argp = (void __user *)arg;
int status, ret = 0;
if (tty->index == MAX_PORTS) {
if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
cmd != MOXA_GETMSTATUS)
return -EINVAL;
} else if (!ch)
return -ENODEV;
switch (cmd) {
case MOXA_GETDATACOUNT:
moxaLog.tick = jiffies;
if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
ret = -EFAULT;
break;
case MOXA_FLUSH_QUEUE:
MoxaPortFlushData(ch, arg);
break;
case MOXA_GET_IOQUEUE: {
struct moxaq_str __user *argm = argp;
struct moxaq_str tmp;
struct moxa_port *p;
unsigned int i, j;
for (i = 0; i < MAX_BOARDS; i++) {
p = moxa_boards[i].ports;
for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
memset(&tmp, 0, sizeof(tmp));
spin_lock_bh(&moxa_lock);
if (moxa_boards[i].ready) {
tmp.inq = MoxaPortRxQueue(p);
tmp.outq = MoxaPortTxQueue(p);
}
spin_unlock_bh(&moxa_lock);
if (copy_to_user(argm, &tmp, sizeof(tmp)))
return -EFAULT;
}
}
break;
} case MOXA_GET_OQUEUE:
status = MoxaPortTxQueue(ch);
ret = put_user(status, (unsigned long __user *)argp);
break;
case MOXA_GET_IQUEUE:
status = MoxaPortRxQueue(ch);
ret = put_user(status, (unsigned long __user *)argp);
break;
case MOXA_GETMSTATUS: {
struct mxser_mstatus __user *argm = argp;
struct mxser_mstatus tmp;
struct moxa_port *p;
unsigned int i, j;
for (i = 0; i < MAX_BOARDS; i++) {
p = moxa_boards[i].ports;
for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
struct tty_struct *ttyp;
memset(&tmp, 0, sizeof(tmp));
spin_lock_bh(&moxa_lock);
if (!moxa_boards[i].ready) {
spin_unlock_bh(&moxa_lock);
goto copy;
}
status = MoxaPortLineStatus(p);
spin_unlock_bh(&moxa_lock);
if (status & 1)
tmp.cts = 1;
if (status & 2)
tmp.dsr = 1;
if (status & 4)
tmp.dcd = 1;
ttyp = tty_port_tty_get(&p->port);
if (!ttyp || !ttyp->termios)
tmp.cflag = p->cflag;
else
tmp.cflag = ttyp->termios->c_cflag;
tty_kref_put(ttyp);
copy:
if (copy_to_user(argm, &tmp, sizeof(tmp)))
return -EFAULT;
}
}
break;
}
case TIOCGSERIAL:
mutex_lock(&ch->port.mutex);
ret = moxa_get_serial_info(ch, argp);
mutex_unlock(&ch->port.mutex);
break;
case TIOCSSERIAL:
mutex_lock(&ch->port.mutex);
ret = moxa_set_serial_info(ch, argp);
mutex_unlock(&ch->port.mutex);
break;
default:
ret = -ENOIOCTLCMD;
}
return ret;
}
static int moxa_break_ctl(struct tty_struct *tty, int state)
{
struct moxa_port *port = tty->driver_data;
moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
Magic_code);
return 0;
}
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,
.ioctl = moxa_ioctl,
.set_termios = moxa_set_termios,
.stop = moxa_stop,
.start = moxa_start,
.hangup = moxa_hangup,
.break_ctl = moxa_break_ctl,
.tiocmget = moxa_tiocmget,
.tiocmset = moxa_tiocmset,
};
static const struct tty_port_operations moxa_port_ops = {
.carrier_raised = moxa_carrier_raised,
.dtr_rts = moxa_dtr_rts,
.shutdown = moxa_shutdown,
};
static struct tty_driver *moxaDriver;
static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
/*
* HW init
*/
static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
{
switch (brd->boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
if (model != 1)
goto err;
break;
case MOXA_BOARD_CP204J:
if (model != 3)
goto err;
break;
default:
if (model != 2)
goto err;
break;
}
return 0;
err:
return -EINVAL;
}
static int moxa_check_fw(const void *ptr)
{
const __le16 *lptr = ptr;
if (*lptr != cpu_to_le16(0x7980))
return -EINVAL;
return 0;
}
static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
size_t len)
{
void __iomem *baseAddr = brd->basemem;
u16 tmp;
writeb(HW_reset, baseAddr + Control_reg); /* reset */
msleep(10);
memset_io(baseAddr, 0, 4096);
memcpy_toio(baseAddr, buf, len); /* download BIOS */
writeb(0, baseAddr + Control_reg); /* restart */
msleep(2000);
switch (brd->boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
tmp = readw(baseAddr + C218_key);
if (tmp != C218_KeyCode)
goto err;
break;
case MOXA_BOARD_CP204J:
tmp = readw(baseAddr + C218_key);
if (tmp != CP204J_KeyCode)
goto err;
break;
default:
tmp = readw(baseAddr + C320_key);
if (tmp != C320_KeyCode)
goto err;
tmp = readw(baseAddr + C320_status);
if (tmp != STS_init) {
printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
"module not found\n");
return -EIO;
}
break;
}
return 0;
err:
printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
return -EIO;
}
static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
size_t len)
{
void __iomem *baseAddr = brd->basemem;
if (len < 7168) {
printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
return -EINVAL;
}
writew(len - 7168 - 2, baseAddr + C320bapi_len);
writeb(1, baseAddr + Control_reg); /* Select Page 1 */
memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
writeb(2, baseAddr + Control_reg); /* Select Page 2 */
memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
return 0;
}
static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
size_t len)
{
void __iomem *baseAddr = brd->basemem;
const __le16 *uptr = ptr;
size_t wlen, len2, j;
unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
unsigned int i, retry;
u16 usum, keycode;
keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
C218_KeyCode;
switch (brd->boardType) {
case MOXA_BOARD_CP204J:
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
key = C218_key;
loadbuf = C218_LoadBuf;
loadlen = C218DLoad_len;
checksum = C218check_sum;
checksum_ok = C218chksum_ok;
break;
default:
key = C320_key;
keycode = C320_KeyCode;
loadbuf = C320_LoadBuf;
loadlen = C320DLoad_len;
checksum = C320check_sum;
checksum_ok = C320chksum_ok;
break;
}
usum = 0;
wlen = len >> 1;
for (i = 0; i < wlen; i++)
usum += le16_to_cpu(uptr[i]);
retry = 0;
do {
wlen = len >> 1;
j = 0;
while (wlen) {
len2 = (wlen > 2048) ? 2048 : wlen;
wlen -= len2;
memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
j += len2 << 1;
writew(len2, baseAddr + loadlen);
writew(0, baseAddr + key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + key) == keycode)
break;
msleep(10);
}
if (readw(baseAddr + key) != keycode)
return -EIO;
}
writew(0, baseAddr + loadlen);
writew(usum, baseAddr + checksum);
writew(0, baseAddr + key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + key) == keycode)
break;
msleep(10);
}
retry++;
} while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
if (readb(baseAddr + checksum_ok) != 1)
return -EIO;
writew(0, baseAddr + key);
for (i = 0; i < 600; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
msleep(10);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return -EIO;
if (MOXA_IS_320(brd)) {
if (brd->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;
msleep(10);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return -EIO;
if (MOXA_IS_320(brd)) {
j = readw(baseAddr + Module_cnt);
if (j <= 0)
return -EIO;
brd->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;
msleep(10);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return -EIO;
}
brd->intNdx = baseAddr + IRQindex;
brd->intPend = baseAddr + IRQpending;
brd->intTable = baseAddr + IRQtable;
return 0;
}
static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
size_t len)
{
void __iomem *ofsAddr, *baseAddr = brd->basemem;
struct moxa_port *port;
int retval, i;
if (len % 2) {
printk(KERN_ERR "MOXA: bios length is not even\n");
return -EINVAL;
}
retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
if (retval)
return retval;
switch (brd->boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
case MOXA_BOARD_CP204J:
port = brd->ports;
for (i = 0; i < brd->numPorts; i++, port++) {
port->board = brd;
port->DCDState = 0;
port->tableAddr = baseAddr + Extern_table +
Extern_size * i;
ofsAddr = port->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:
port = brd->ports;
for (i = 0; i < brd->numPorts; i++, port++) {
port->board = brd;
port->DCDState = 0;
port->tableAddr = baseAddr + Extern_table +
Extern_size * i;
ofsAddr = port->tableAddr;
switch (brd->numPorts) {
case 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);
break;
case 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);
break;
case 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);
break;
case 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;
}
}
break;
}
return 0;
}
static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
{
const void *ptr = fw->data;
char rsn[64];
u16 lens[5];
size_t len;
unsigned int a, lenp, lencnt;
int ret = -EINVAL;
struct {
__le32 magic; /* 0x34303430 */
u8 reserved1[2];
u8 type; /* UNIX = 3 */
u8 model; /* C218T=1, C320T=2, CP204=3 */
u8 reserved2[8];
__le16 len[5];
} const *hdr = ptr;
BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
if (fw->size < MOXA_FW_HDRLEN) {
strcpy(rsn, "too short (even header won't fit)");
goto err;
}
if (hdr->magic != cpu_to_le32(0x30343034)) {
sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
goto err;
}
if (hdr->type != 3) {
sprintf(rsn, "not for linux, type is %u", hdr->type);
goto err;
}
if (moxa_check_fw_model(brd, hdr->model)) {
sprintf(rsn, "not for this card, model is %u", hdr->model);
goto err;
}
len = MOXA_FW_HDRLEN;
lencnt = hdr->model == 2 ? 5 : 3;
for (a = 0; a < ARRAY_SIZE(lens); a++) {
lens[a] = le16_to_cpu(hdr->len[a]);
if (lens[a] && len + lens[a] <= fw->size &&
moxa_check_fw(&fw->data[len]))
printk(KERN_WARNING "MOXA firmware: unexpected input "
"at offset %u, but going on\n", (u32)len);
if (!lens[a] && a < lencnt) {
sprintf(rsn, "too few entries in fw file");
goto err;
}
len += lens[a];
}
if (len != fw->size) {
sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
(u32)len);
goto err;
}
ptr += MOXA_FW_HDRLEN;
lenp = 0; /* bios */
strcpy(rsn, "read above");
ret = moxa_load_bios(brd, ptr, lens[lenp]);
if (ret)
goto err;
/* we skip the tty section (lens[1]), since we don't need it */
ptr += lens[lenp] + lens[lenp + 1];
lenp += 2; /* comm */
if (hdr->model == 2) {
ret = moxa_load_320b(brd, ptr, lens[lenp]);
if (ret)
goto err;
/* skip another tty */
ptr += lens[lenp] + lens[lenp + 1];
lenp += 2;
}
ret = moxa_load_code(brd, ptr, lens[lenp]);
if (ret)
goto err;
return 0;
err:
printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
return ret;
}
static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
{
const struct firmware *fw;
const char *file;
struct moxa_port *p;
unsigned int i;
int ret;
brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
GFP_KERNEL);
if (brd->ports == NULL) {
printk(KERN_ERR "cannot allocate memory for ports\n");
ret = -ENOMEM;
goto err;
}
for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
tty_port_init(&p->port);
p->port.ops = &moxa_port_ops;
p->type = PORT_16550A;
p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
}
switch (brd->boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
file = "c218tunx.cod";
break;
case MOXA_BOARD_CP204J:
file = "cp204unx.cod";
break;
default:
file = "c320tunx.cod";
break;
}
ret = request_firmware(&fw, file, dev);
if (ret) {
printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
"you've placed '%s' file into your firmware "
"loader directory (e.g. /lib/firmware)\n",
file);
goto err_free;
}
ret = moxa_load_fw(brd, fw);
release_firmware(fw);
if (ret)
goto err_free;
spin_lock_bh(&moxa_lock);
brd->ready = 1;
if (!timer_pending(&moxaTimer))
mod_timer(&moxaTimer, jiffies + HZ / 50);
spin_unlock_bh(&moxa_lock);
return 0;
err_free:
kfree(brd->ports);
err:
return ret;
}
static void moxa_board_deinit(struct moxa_board_conf *brd)
{
unsigned int a, opened;
mutex_lock(&moxa_openlock);
spin_lock_bh(&moxa_lock);
brd->ready = 0;
spin_unlock_bh(&moxa_lock);
/* pci hot-un-plug support */
for (a = 0; a < brd->numPorts; a++)
if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
struct tty_struct *tty = tty_port_tty_get(
&brd->ports[a].port);
if (tty) {
tty_hangup(tty);
tty_kref_put(tty);
}
}
while (1) {
opened = 0;
for (a = 0; a < brd->numPorts; a++)
if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
opened++;
mutex_unlock(&moxa_openlock);
if (!opened)
break;
msleep(50);
mutex_lock(&moxa_openlock);
}
iounmap(brd->basemem);
brd->basemem = NULL;
kfree(brd->ports);
}
#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) {
dev_err(&pdev->dev, "can't enable pci device\n");
goto err;
}
for (i = 0; i < MAX_BOARDS; i++)
if (moxa_boards[i].basemem == NULL)
break;
retval = -ENODEV;
if (i >= MAX_BOARDS) {
dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
"found. Board is ignored.\n", MAX_BOARDS);
goto err;
}
board = &moxa_boards[i];
retval = pci_request_region(pdev, 2, "moxa-base");
if (retval) {
dev_err(&pdev->dev, "can't request pci region 2\n");
goto err;
}
board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
if (board->basemem == NULL) {
dev_err(&pdev->dev, "can't remap io space 2\n");
goto err_reg;
}
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;
retval = moxa_init_board(board, &pdev->dev);
if (retval)
goto err_base;
pci_set_drvdata(pdev, board);
dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
moxa_brdname[board_type - 1], board->numPorts);
return 0;
err_base:
iounmap(board->basemem);