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1da177e4
LT		 1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
b9705b60
JS		 5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
1da177e4
LT		 7 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
1da177e4
LT		 15 */
16
17/*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/mm.h>
27#include <linux/ioport.h>
28#include <linux/errno.h>
03718234 29#include <linux/firmware.h>
1da177e4
LT		 30#include <linux/signal.h>
31#include <linux/sched.h>
32#include <linux/timer.h>
33#include <linux/interrupt.h>
34#include <linux/tty.h>
35#include <linux/tty_flip.h>
36#include <linux/major.h>
37#include <linux/string.h>
38#include <linux/fcntl.h>
39#include <linux/ptrace.h>
40#include <linux/serial.h>
41#include <linux/tty_driver.h>
42#include <linux/delay.h>
43#include <linux/pci.h>
44#include <linux/init.h>
45#include <linux/bitops.h>
46
47#include <asm/system.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50
03718234
JS		 51#include "moxa.h"
52
b9705b60 53#define MOXA_VERSION "6.0k"
1da177e4 54
03718234
JS		 55#define MOXA_FW_HDRLEN 32
56
11324edd 57#define MOXAMAJOR 172
1da177e4 58
11324edd 59#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 60#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 61#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4 62
08d01c79
JS		 63#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
64 (brd)->boardType == MOXA_BOARD_C320_PCI)
65
1da177e4
LT		 66/*
67 * Define the Moxa PCI vendor and device IDs.
68 */
11324edd
JS		 69#define MOXA_BUS_TYPE_ISA 0
70#define MOXA_BUS_TYPE_PCI 1
1da177e4 71
1da177e4
LT		 72enum {
73 MOXA_BOARD_C218_PCI = 1,
74 MOXA_BOARD_C218_ISA,
75 MOXA_BOARD_C320_PCI,
76 MOXA_BOARD_C320_ISA,
77 MOXA_BOARD_CP204J,
78};
79
80static char *moxa_brdname[] =
81{
82 "C218 Turbo PCI series",
83 "C218 Turbo ISA series",
84 "C320 Turbo PCI series",
85 "C320 Turbo ISA series",
86 "CP-204J series",
87};
88
89#ifdef CONFIG_PCI
90static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
92 .driver_data = MOXA_BOARD_C218_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
94 .driver_data = MOXA_BOARD_C320_PCI },
95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
96 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 97 { 0 }
98};
99MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
100#endif /* CONFIG_PCI */
101
03718234
JS		 102struct moxa_port;
103
8f8ecbad 104static struct moxa_board_conf {
1da177e4
LT		 105 int boardType;
106 int numPorts;
1da177e4 107 int busType;
8f8ecbad 108
810ab09b 109 unsigned int ready;
8f8ecbad 110
03718234
JS		 111 struct moxa_port *ports;
112
8f8ecbad
JS		 113 void __iomem *basemem;
114 void __iomem *intNdx;
115 void __iomem *intPend;
116 void __iomem *intTable;
117} moxa_boards[MAX_BOARDS];
118
119struct mxser_mstatus {
120 tcflag_t cflag;
121 int cts;
122 int dsr;
123 int ri;
124 int dcd;
9dff89cd 125};
1da177e4 126
8f8ecbad
JS		 127struct moxaq_str {
128 int inq;
129 int outq;
130};
1da177e4 131
8f8ecbad 132struct moxa_port {
9de6a51f 133 struct tty_port port;
b4173f45 134 struct moxa_board_conf *board;
7bcf97d1
JS		 135 void __iomem *tableAddr;
136
1da177e4 137 int type;
1da177e4 138 int cflag;
7bcf97d1 139 unsigned long statusflags;
1da177e4 140
7bcf97d1
JS		 141 u8 DCDState;
142 u8 lineCtrl;
143 u8 lowChkFlag;
8f8ecbad 144};
1da177e4 145
74d7d97b
JS		 146struct mon_str {
147 int tick;
148 int rxcnt[MAX_PORTS];
149 int txcnt[MAX_PORTS];
150};
151
1da177e4
LT		 152/* statusflags */
153#define TXSTOPPED 0x1
154#define LOWWAIT 0x2
155#define EMPTYWAIT 0x4
156#define THROTTLE 0x8
157
1da177e4
LT		 158#define SERIAL_DO_RESTART
159
1da177e4
LT		 160#define WAKEUP_CHARS 256
161
1da177e4 162static int ttymajor = MOXAMAJOR;
74d7d97b
JS		 163static struct mon_str moxaLog;
164static unsigned int moxaFuncTout = HZ / 2;
7bcf97d1 165static unsigned int moxaLowWaterChk;
a8f5cda0 166static DEFINE_MUTEX(moxa_openlock);
1da177e4
LT		 167/* Variables for insmod */
168#ifdef MODULE
d353eca4
JS		 169static unsigned long baseaddr[MAX_BOARDS];
170static unsigned int type[MAX_BOARDS];
171static unsigned int numports[MAX_BOARDS];
1da177e4
LT		 172#endif
173
174MODULE_AUTHOR("William Chen");
175MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
176MODULE_LICENSE("GPL");
177#ifdef MODULE
d353eca4
JS		 178module_param_array(type, uint, NULL, 0);
179MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
180module_param_array(baseaddr, ulong, NULL, 0);
181MODULE_PARM_DESC(baseaddr, "base address");
182module_param_array(numports, uint, NULL, 0);
183MODULE_PARM_DESC(numports, "numports (ignored for C218)");
1da177e4
LT		 184#endif
185module_param(ttymajor, int, 0);
1da177e4 186
1da177e4
LT		 187/*
188 * static functions:
189 */
1da177e4
LT		 190static int moxa_open(struct tty_struct *, struct file *);
191static void moxa_close(struct tty_struct *, struct file *);
192static int moxa_write(struct tty_struct *, const unsigned char *, int);
193static int moxa_write_room(struct tty_struct *);
194static void moxa_flush_buffer(struct tty_struct *);
195static int moxa_chars_in_buffer(struct tty_struct *);
1da177e4
LT		 196static void moxa_throttle(struct tty_struct *);
197static void moxa_unthrottle(struct tty_struct *);
606d099c 198static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT		 199static void moxa_stop(struct tty_struct *);
200static void moxa_start(struct tty_struct *);
201static void moxa_hangup(struct tty_struct *);
202static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
203static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
204 unsigned int set, unsigned int clear);
205static void moxa_poll(unsigned long);
db1acaa6 206static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 207static void moxa_setup_empty_event(struct tty_struct *);
6f56b658 208static void moxa_shut_down(struct moxa_port *);
1da177e4
LT		 209/*
210 * moxa board interface functions:
211 */
b4173f45
JS		 212static void MoxaPortEnable(struct moxa_port *);
213static void MoxaPortDisable(struct moxa_port *);
214static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
215static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
216static void MoxaPortLineCtrl(struct moxa_port *, int, int);
217static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
218static int MoxaPortLineStatus(struct moxa_port *);
b4173f45 219static void MoxaPortFlushData(struct moxa_port *, int);
2108eba5 220static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
7bcf97d1 221static int MoxaPortReadData(struct moxa_port *);
b4173f45
JS		 222static int MoxaPortTxQueue(struct moxa_port *);
223static int MoxaPortRxQueue(struct moxa_port *);
224static int MoxaPortTxFree(struct moxa_port *);
225static void MoxaPortTxDisable(struct moxa_port *);
226static void MoxaPortTxEnable(struct moxa_port *);
8f8ecbad
JS		 227static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
228static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
b4173f45 229static void MoxaSetFifo(struct moxa_port *port, int enable);
1da177e4 230
74d7d97b
JS		 231/*
232 * I/O functions
233 */
234
235static void moxa_wait_finish(void __iomem *ofsAddr)
236{
237 unsigned long end = jiffies + moxaFuncTout;
238
239 while (readw(ofsAddr + FuncCode) != 0)
240 if (time_after(jiffies, end))
241 return;
242 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
243 printk(KERN_WARNING "moxa function expired\n");
244}
245
eaa95a8d 246static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
74d7d97b
JS		 247{
248 writew(arg, ofsAddr + FuncArg);
249 writew(cmd, ofsAddr + FuncCode);
250 moxa_wait_finish(ofsAddr);
251}
252
7bcf97d1
JS		 253static void moxa_low_water_check(void __iomem *ofsAddr)
254{
255 u16 rptr, wptr, mask, len;
256
257 if (readb(ofsAddr + FlagStat) & Xoff_state) {
258 rptr = readw(ofsAddr + RXrptr);
259 wptr = readw(ofsAddr + RXwptr);
260 mask = readw(ofsAddr + RX_mask);
261 len = (wptr - rptr) & mask;
262 if (len <= Low_water)
263 moxafunc(ofsAddr, FC_SendXon, 0);
264 }
265}
266
74d7d97b
JS		 267/*
268 * TTY operations
269 */
270
271static int moxa_ioctl(struct tty_struct *tty, struct file *file,
272 unsigned int cmd, unsigned long arg)
273{
274 struct moxa_port *ch = tty->driver_data;
275 void __user *argp = (void __user *)arg;
a8f5cda0 276 int status, ret = 0;
74d7d97b
JS		 277
278 if (tty->index == MAX_PORTS) {
279 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
280 cmd != MOXA_GETMSTATUS)
281 return -EINVAL;
282 } else if (!ch)
283 return -ENODEV;
284
285 switch (cmd) {
286 case MOXA_GETDATACOUNT:
287 moxaLog.tick = jiffies;
a8f5cda0
JS		 288 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
289 ret = -EFAULT;
290 break;
74d7d97b
JS		 291 case MOXA_FLUSH_QUEUE:
292 MoxaPortFlushData(ch, arg);
a8f5cda0 293 break;
74d7d97b
JS		 294 case MOXA_GET_IOQUEUE: {
295 struct moxaq_str __user *argm = argp;
296 struct moxaq_str tmp;
297 struct moxa_port *p;
298 unsigned int i, j;
299
a8f5cda0 300 mutex_lock(&moxa_openlock);
74d7d97b
JS		 301 for (i = 0; i < MAX_BOARDS; i++) {
302 p = moxa_boards[i].ports;
303 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
304 memset(&tmp, 0, sizeof(tmp));
305 if (moxa_boards[i].ready) {
306 tmp.inq = MoxaPortRxQueue(p);
307 tmp.outq = MoxaPortTxQueue(p);
308 }
a8f5cda0
JS		 309 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
310 mutex_unlock(&moxa_openlock);
74d7d97b 311 return -EFAULT;
a8f5cda0 312 }
74d7d97b
JS		 313 }
314 }
a8f5cda0
JS		 315 mutex_unlock(&moxa_openlock);
316 break;
74d7d97b
JS		 317 } case MOXA_GET_OQUEUE:
318 status = MoxaPortTxQueue(ch);
a8f5cda0
JS		 319 ret = put_user(status, (unsigned long __user *)argp);
320 break;
74d7d97b
JS		 321 case MOXA_GET_IQUEUE:
322 status = MoxaPortRxQueue(ch);
a8f5cda0
JS		 323 ret = put_user(status, (unsigned long __user *)argp);
324 break;
74d7d97b
JS		 325 case MOXA_GETMSTATUS: {
326 struct mxser_mstatus __user *argm = argp;
327 struct mxser_mstatus tmp;
328 struct moxa_port *p;
329 unsigned int i, j;
330
a8f5cda0 331 mutex_lock(&moxa_openlock);
74d7d97b
JS		 332 for (i = 0; i < MAX_BOARDS; i++) {
333 p = moxa_boards[i].ports;
334 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
335 memset(&tmp, 0, sizeof(tmp));
336 if (!moxa_boards[i].ready)
337 goto copy;
338
339 status = MoxaPortLineStatus(p);
340 if (status & 1)
341 tmp.cts = 1;
342 if (status & 2)
343 tmp.dsr = 1;
344 if (status & 4)
345 tmp.dcd = 1;
346
9de6a51f 347 if (!p->port.tty || !p->port.tty->termios)
74d7d97b
JS		 348 tmp.cflag = p->cflag;
349 else
9de6a51f 350 tmp.cflag = p->port.tty->termios->c_cflag;
74d7d97b 351copy:
a8f5cda0
JS		 352 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
353 mutex_unlock(&moxa_openlock);
74d7d97b 354 return -EFAULT;
a8f5cda0 355 }
74d7d97b
JS		 356 }
357 }
a8f5cda0
JS		 358 mutex_unlock(&moxa_openlock);
359 break;
74d7d97b
JS		 360 }
361 case TIOCGSERIAL:
a8f5cda0
JS		 362 mutex_lock(&moxa_openlock);
363 ret = moxa_get_serial_info(ch, argp);
364 mutex_unlock(&moxa_openlock);
365 break;
74d7d97b 366 case TIOCSSERIAL:
a8f5cda0
JS		 367 mutex_lock(&moxa_openlock);
368 ret = moxa_set_serial_info(ch, argp);
369 mutex_unlock(&moxa_openlock);
370 break;
371 default:
372 ret = -ENOIOCTLCMD;
74d7d97b 373 }
a8f5cda0 374 return ret;
74d7d97b
JS		 375}
376
377static void moxa_break_ctl(struct tty_struct *tty, int state)
378{
379 struct moxa_port *port = tty->driver_data;
380
381 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
382 Magic_code);
383}
384
b68e31d0 385static const struct tty_operations moxa_ops = {
1da177e4
LT		 386 .open = moxa_open,
387 .close = moxa_close,
388 .write = moxa_write,
389 .write_room = moxa_write_room,
390 .flush_buffer = moxa_flush_buffer,
391 .chars_in_buffer = moxa_chars_in_buffer,
1da177e4
LT		 392 .ioctl = moxa_ioctl,
393 .throttle = moxa_throttle,
394 .unthrottle = moxa_unthrottle,
395 .set_termios = moxa_set_termios,
396 .stop = moxa_stop,
397 .start = moxa_start,
398 .hangup = moxa_hangup,
74d7d97b 399 .break_ctl = moxa_break_ctl,
1da177e4
LT		 400 .tiocmget = moxa_tiocmget,
401 .tiocmset = moxa_tiocmset,
402};
403
aa7e5221 404static struct tty_driver *moxaDriver;
aa7e5221 405static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 406static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 407
74d7d97b
JS		 408/*
409 * HW init
410 */
411
03718234
JS		 412static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
413{
414 switch (brd->boardType) {
415 case MOXA_BOARD_C218_ISA:
416 case MOXA_BOARD_C218_PCI:
417 if (model != 1)
418 goto err;
419 break;
420 case MOXA_BOARD_CP204J:
421 if (model != 3)
422 goto err;
423 break;
424 default:
425 if (model != 2)
426 goto err;
427 break;
428 }
429 return 0;
430err:
431 return -EINVAL;
432}
433
434static int moxa_check_fw(const void *ptr)
435{
436 const __le16 *lptr = ptr;
437
438 if (*lptr != cpu_to_le16(0x7980))
439 return -EINVAL;
440
441 return 0;
442}
443
444static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
445 size_t len)
446{
447 void __iomem *baseAddr = brd->basemem;
448 u16 tmp;
449
450 writeb(HW_reset, baseAddr + Control_reg); /* reset */
451 msleep(10);
452 memset_io(baseAddr, 0, 4096);
453 memcpy_toio(baseAddr, buf, len); /* download BIOS */
454 writeb(0, baseAddr + Control_reg); /* restart */
455
456 msleep(2000);
457
458 switch (brd->boardType) {
459 case MOXA_BOARD_C218_ISA:
460 case MOXA_BOARD_C218_PCI:
461 tmp = readw(baseAddr + C218_key);
462 if (tmp != C218_KeyCode)
463 goto err;
464 break;
465 case MOXA_BOARD_CP204J:
466 tmp = readw(baseAddr + C218_key);
467 if (tmp != CP204J_KeyCode)
468 goto err;
469 break;
470 default:
471 tmp = readw(baseAddr + C320_key);
472 if (tmp != C320_KeyCode)
473 goto err;
474 tmp = readw(baseAddr + C320_status);
475 if (tmp != STS_init) {
eaa95a8d 476 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
03718234
JS		 477 "module not found\n");
478 return -EIO;
479 }
480 break;
481 }
482
483 return 0;
484err:
eaa95a8d 485 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
03718234
JS		 486 return -EIO;
487}
488
489static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
490 size_t len)
491{
492 void __iomem *baseAddr = brd->basemem;
493
494 if (len < 7168) {
eaa95a8d 495 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
03718234
JS		 496 return -EINVAL;
497 }
498
499 writew(len - 7168 - 2, baseAddr + C320bapi_len);
500 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
501 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
502 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
503 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
504
505 return 0;
506}
507
5292bcd3 508static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 509 size_t len)
510{
511 void __iomem *baseAddr = brd->basemem;
512 const u16 *uptr = ptr;
513 size_t wlen, len2, j;
5292bcd3 514 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
08d01c79 515 unsigned int i, retry;
03718234
JS		 516 u16 usum, keycode;
517
5292bcd3
JS		 518 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
519 C218_KeyCode;
03718234 520
5292bcd3
JS		 521 switch (brd->boardType) {
522 case MOXA_BOARD_CP204J:
523 case MOXA_BOARD_C218_ISA:
524 case MOXA_BOARD_C218_PCI:
525 key = C218_key;
526 loadbuf = C218_LoadBuf;
527 loadlen = C218DLoad_len;
528 checksum = C218check_sum;
529 checksum_ok = C218chksum_ok;
530 break;
531 default:
532 key = C320_key;
533 keycode = C320_KeyCode;
534 loadbuf = C320_LoadBuf;
535 loadlen = C320DLoad_len;
536 checksum = C320check_sum;
537 checksum_ok = C320chksum_ok;
538 break;
03718234 539 }
03718234
JS		 540
541 usum = 0;
542 wlen = len >> 1;
543 for (i = 0; i < wlen; i++)
544 usum += le16_to_cpu(uptr[i]);
545 retry = 0;
546 do {
547 wlen = len >> 1;
548 j = 0;
549 while (wlen) {
550 len2 = (wlen > 2048) ? 2048 : wlen;
551 wlen -= len2;
5292bcd3 552 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 553 j += len2 << 1;
5292bcd3
JS		 554
555 writew(len2, baseAddr + loadlen);
556 writew(0, baseAddr + key);
557 for (i = 0; i < 100; i++) {
558 if (readw(baseAddr + key) == keycode)
03718234
JS		 559 break;
560 msleep(10);
561 }
5292bcd3 562 if (readw(baseAddr + key) != keycode)
03718234
JS		 563 return -EIO;
564 }
5292bcd3
JS		 565 writew(0, baseAddr + loadlen);
566 writew(usum, baseAddr + checksum);
567 writew(0, baseAddr + key);
568 for (i = 0; i < 100; i++) {
569 if (readw(baseAddr + key) == keycode)
03718234
JS		 570 break;
571 msleep(10);
572 }
573 retry++;
5292bcd3
JS		 574 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
575 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 576 return -EIO;
577
5292bcd3 578 writew(0, baseAddr + key);
03718234
JS		 579 for (i = 0; i < 600; i++) {
580 if (readw(baseAddr + Magic_no) == Magic_code)
581 break;
582 msleep(10);
583 }
584 if (readw(baseAddr + Magic_no) != Magic_code)
585 return -EIO;
586
08d01c79 587 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 588 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
589 writew(0x3800, baseAddr + TMS320_PORT1);
590 writew(0x3900, baseAddr + TMS320_PORT2);
591 writew(28499, baseAddr + TMS320_CLOCK);
592 } else {
593 writew(0x3200, baseAddr + TMS320_PORT1);
594 writew(0x3400, baseAddr + TMS320_PORT2);
595 writew(19999, baseAddr + TMS320_CLOCK);
596 }
03718234
JS		 597 }
598 writew(1, baseAddr + Disable_IRQ);
599 writew(0, baseAddr + Magic_no);
600 for (i = 0; i < 500; i++) {
601 if (readw(baseAddr + Magic_no) == Magic_code)
602 break;
603 msleep(10);
604 }
605 if (readw(baseAddr + Magic_no) != Magic_code)
606 return -EIO;
607
08d01c79 608 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 609 j = readw(baseAddr + Module_cnt);
610 if (j <= 0)
611 return -EIO;
612 brd->numPorts = j * 8;
613 writew(j, baseAddr + Module_no);
614 writew(0, baseAddr + Magic_no);
615 for (i = 0; i < 600; i++) {
616 if (readw(baseAddr + Magic_no) == Magic_code)
617 break;
618 msleep(10);
619 }
620 if (readw(baseAddr + Magic_no) != Magic_code)
621 return -EIO;
03718234 622 }
03718234
JS		 623 brd->intNdx = baseAddr + IRQindex;
624 brd->intPend = baseAddr + IRQpending;
625 brd->intTable = baseAddr + IRQtable;
626
627 return 0;
628}
629
630static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
631 size_t len)
632{
633 void __iomem *ofsAddr, *baseAddr = brd->basemem;
634 struct moxa_port *port;
635 int retval, i;
636
637 if (len % 2) {
eaa95a8d 638 printk(KERN_ERR "MOXA: bios length is not even\n");
03718234
JS		 639 return -EINVAL;
640 }
641
5292bcd3
JS		 642 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
643 if (retval)
644 return retval;
645
03718234
JS		 646 switch (brd->boardType) {
647 case MOXA_BOARD_C218_ISA:
648 case MOXA_BOARD_C218_PCI:
649 case MOXA_BOARD_CP204J:
03718234
JS		 650 port = brd->ports;
651 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 652 port->board = brd;
03718234
JS		 653 port->DCDState = 0;
654 port->tableAddr = baseAddr + Extern_table +
655 Extern_size * i;
656 ofsAddr = port->tableAddr;
657 writew(C218rx_mask, ofsAddr + RX_mask);
658 writew(C218tx_mask, ofsAddr + TX_mask);
659 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
660 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
661
662 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
663 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
664
665 }
666 break;
667 default:
03718234
JS		 668 port = brd->ports;
669 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 670 port->board = brd;
03718234
JS		 671 port->DCDState = 0;
672 port->tableAddr = baseAddr + Extern_table +
673 Extern_size * i;
674 ofsAddr = port->tableAddr;
675 switch (brd->numPorts) {
676 case 8:
677 writew(C320p8rx_mask, ofsAddr + RX_mask);
678 writew(C320p8tx_mask, ofsAddr + TX_mask);
679 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
680 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
681 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
682 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
683
684 break;
685 case 16:
686 writew(C320p16rx_mask, ofsAddr + RX_mask);
687 writew(C320p16tx_mask, ofsAddr + TX_mask);
688 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
689 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
690 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
691 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
692 break;
693
694 case 24:
695 writew(C320p24rx_mask, ofsAddr + RX_mask);
696 writew(C320p24tx_mask, ofsAddr + TX_mask);
697 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
698 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
699 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
700 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
701 break;
702 case 32:
703 writew(C320p32rx_mask, ofsAddr + RX_mask);
704 writew(C320p32tx_mask, ofsAddr + TX_mask);
705 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
706 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
707 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
708 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
709 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
710 break;
711 }
712 }
713 break;
714 }
03718234
JS		 715 return 0;
716}
717
718static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
719{
2bca76e8 720 const void *ptr = fw->data;
03718234
JS		 721 char rsn[64];
722 u16 lens[5];
723 size_t len;
724 unsigned int a, lenp, lencnt;
725 int ret = -EINVAL;
726 struct {
727 __le32 magic; /* 0x34303430 */
728 u8 reserved1[2];
729 u8 type; /* UNIX = 3 */
730 u8 model; /* C218T=1, C320T=2, CP204=3 */
731 u8 reserved2[8];
732 __le16 len[5];
2bca76e8 733 } const *hdr = ptr;
03718234
JS		 734
735 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
736
737 if (fw->size < MOXA_FW_HDRLEN) {
738 strcpy(rsn, "too short (even header won't fit)");
739 goto err;
740 }
741 if (hdr->magic != cpu_to_le32(0x30343034)) {
742 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
743 goto err;
744 }
745 if (hdr->type != 3) {
746 sprintf(rsn, "not for linux, type is %u", hdr->type);
747 goto err;
748 }
749 if (moxa_check_fw_model(brd, hdr->model)) {
750 sprintf(rsn, "not for this card, model is %u", hdr->model);
751 goto err;
752 }
753
754 len = MOXA_FW_HDRLEN;
755 lencnt = hdr->model == 2 ? 5 : 3;
756 for (a = 0; a < ARRAY_SIZE(lens); a++) {
757 lens[a] = le16_to_cpu(hdr->len[a]);
758 if (lens[a] && len + lens[a] <= fw->size &&
759 moxa_check_fw(&fw->data[len]))
eaa95a8d 760 printk(KERN_WARNING "MOXA firmware: unexpected input "
03718234
JS		 761 "at offset %u, but going on\n", (u32)len);
762 if (!lens[a] && a < lencnt) {
763 sprintf(rsn, "too few entries in fw file");
764 goto err;
765 }
766 len += lens[a];
767 }
768
769 if (len != fw->size) {
770 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
771 (u32)len);
772 goto err;
773 }
774
775 ptr += MOXA_FW_HDRLEN;
776 lenp = 0; /* bios */
777
778 strcpy(rsn, "read above");
779
780 ret = moxa_load_bios(brd, ptr, lens[lenp]);
781 if (ret)
782 goto err;
783
784 /* we skip the tty section (lens[1]), since we don't need it */
785 ptr += lens[lenp] + lens[lenp + 1];
786 lenp += 2; /* comm */
787
788 if (hdr->model == 2) {
789 ret = moxa_load_320b(brd, ptr, lens[lenp]);
790 if (ret)
791 goto err;
792 /* skip another tty */
793 ptr += lens[lenp] + lens[lenp + 1];
794 lenp += 2;
795 }
796
797 ret = moxa_load_code(brd, ptr, lens[lenp]);
798 if (ret)
799 goto err;
800
801 return 0;
802err:
803 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
804 return ret;
805}
806
807static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
808{
809 const struct firmware *fw;
810 const char *file;
810ab09b
JS		 811 struct moxa_port *p;
812 unsigned int i;
03718234
JS		 813 int ret;
814
810ab09b
JS		 815 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
816 GFP_KERNEL);
817 if (brd->ports == NULL) {
818 printk(KERN_ERR "cannot allocate memory for ports\n");
819 ret = -ENOMEM;
820 goto err;
821 }
822
823 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
44b7d1b3 824 tty_port_init(&p->port);
810ab09b 825 p->type = PORT_16550A;
810ab09b 826 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
810ab09b
JS		 827 }
828
03718234
JS		 829 switch (brd->boardType) {
830 case MOXA_BOARD_C218_ISA:
831 case MOXA_BOARD_C218_PCI:
832 file = "c218tunx.cod";
833 break;
834 case MOXA_BOARD_CP204J:
835 file = "cp204unx.cod";
836 break;
837 default:
838 file = "c320tunx.cod";
839 break;
840 }
841
842 ret = request_firmware(&fw, file, dev);
843 if (ret) {
ec09cd56
JS		 844 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
845 "you've placed '%s' file into your firmware "
846 "loader directory (e.g. /lib/firmware)\n",
847 file);
810ab09b 848 goto err_free;
03718234
JS		 849 }
850
851 ret = moxa_load_fw(brd, fw);
852
853 release_firmware(fw);
810ab09b
JS		 854
855 if (ret)
856 goto err_free;
857
2a541341 858 spin_lock_bh(&moxa_lock);
810ab09b 859 brd->ready = 1;
0bcc4caa
JS		 860 if (!timer_pending(&moxaTimer))
861 mod_timer(&moxaTimer, jiffies + HZ / 50);
2a541341 862 spin_unlock_bh(&moxa_lock);
0bcc4caa 863
810ab09b
JS		 864 return 0;
865err_free:
866 kfree(brd->ports);
867err:
03718234
JS		 868 return ret;
869}
870
810ab09b
JS		 871static void moxa_board_deinit(struct moxa_board_conf *brd)
872{
a8f5cda0
JS		 873 unsigned int a, opened;
874
875 mutex_lock(&moxa_openlock);
7bcf97d1 876 spin_lock_bh(&moxa_lock);
810ab09b 877 brd->ready = 0;
7bcf97d1 878 spin_unlock_bh(&moxa_lock);
a8f5cda0
JS		 879
880 /* pci hot-un-plug support */
881 for (a = 0; a < brd->numPorts; a++)
9de6a51f
AC		 882 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
883 tty_hangup(brd->ports[a].port.tty);
a8f5cda0
JS		 884 while (1) {
885 opened = 0;
886 for (a = 0; a < brd->numPorts; a++)
9de6a51f 887 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
a8f5cda0
JS		 888 opened++;
889 mutex_unlock(&moxa_openlock);
890 if (!opened)
891 break;
892 msleep(50);
893 mutex_lock(&moxa_openlock);
894 }
895
810ab09b
JS		 896 iounmap(brd->basemem);
897 brd->basemem = NULL;
898 kfree(brd->ports);
899}
900
1da177e4 901#ifdef CONFIG_PCI
9cde5bf0
JS		 902static int __devinit moxa_pci_probe(struct pci_dev *pdev,
903 const struct pci_device_id *ent)
1da177e4 904{
9cde5bf0
JS		 905 struct moxa_board_conf *board;
906 unsigned int i;
907 int board_type = ent->driver_data;
908 int retval;
909
910 retval = pci_enable_device(pdev);
7aeb95da
JS		 911 if (retval) {
912 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 913 goto err;
7aeb95da 914 }
9cde5bf0
JS		 915
916 for (i = 0; i < MAX_BOARDS; i++)
917 if (moxa_boards[i].basemem == NULL)
918 break;
919
920 retval = -ENODEV;
921 if (i >= MAX_BOARDS) {
7aeb95da 922 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 923 "found. Board is ignored.\n", MAX_BOARDS);
924 goto err;
925 }
926
927 board = &moxa_boards[i];
e46a5e3f
JS		 928
929 retval = pci_request_region(pdev, 2, "moxa-base");
930 if (retval) {
931 dev_err(&pdev->dev, "can't request pci region 2\n");
932 goto err;
933 }
934
24cb2335 935 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 936 if (board->basemem == NULL) {
937 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 938 goto err_reg;
7aeb95da 939 }
9cde5bf0 940
1da177e4
LT		 941 board->boardType = board_type;
942 switch (board_type) {
943 case MOXA_BOARD_C218_ISA:
944 case MOXA_BOARD_C218_PCI:
945 board->numPorts = 8;
946 break;
947
948 case MOXA_BOARD_CP204J:
949 board->numPorts = 4;
950 break;
951 default:
952 board->numPorts = 0;
953 break;
954 }
955 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 956
03718234
JS		 957 retval = moxa_init_board(board, &pdev->dev);
958 if (retval)
959 goto err_base;
960
9cde5bf0 961 pci_set_drvdata(pdev, board);
1da177e4 962
bb9f910a
JS		 963 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
964 moxa_brdname[board_type - 1], board->numPorts);
965
eaa95a8d 966 return 0;
03718234
JS		 967err_base:
968 iounmap(board->basemem);
969 board->basemem = NULL;
e46a5e3f
JS		 970err_reg:
971 pci_release_region(pdev, 2);
9cde5bf0
JS		 972err:
973 return retval;
974}
975
976static void __devexit moxa_pci_remove(struct pci_dev *pdev)
977{
978 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
979
810ab09b
JS		 980 moxa_board_deinit(brd);
981
e46a5e3f 982 pci_release_region(pdev, 2);
1da177e4 983}
a784bf7c
JS		 984
985static struct pci_driver moxa_pci_driver = {
986 .name = "moxa",
987 .id_table = moxa_pcibrds,
988 .probe = moxa_pci_probe,
989 .remove = __devexit_p(moxa_pci_remove)
990};
1da177e4
LT		 991#endif /* CONFIG_PCI */
992
993static int __init moxa_init(void)
994{
810ab09b 995 unsigned int isabrds = 0;
d353eca4 996 int retval = 0;
1da177e4 997
7aeb95da
JS		 998 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
999 MOXA_VERSION);
1da177e4
LT		 1000 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1001 if (!moxaDriver)
1002 return -ENOMEM;
1003
1da177e4 1004 moxaDriver->owner = THIS_MODULE;
9b4e3b13 1005 moxaDriver->name = "ttyMX";
1da177e4
LT		 1006 moxaDriver->major = ttymajor;
1007 moxaDriver->minor_start = 0;
1008 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1009 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1010 moxaDriver->init_termios = tty_std_termios;
1da177e4 1011 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1012 moxaDriver->init_termios.c_ispeed = 9600;
1013 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 1014 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1015 tty_set_operations(moxaDriver, &moxa_ops);
1016
1da177e4 1017 if (tty_register_driver(moxaDriver)) {
eaa95a8d 1018 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1da177e4
LT		 1019 put_tty_driver(moxaDriver);
1020 return -1;
1021 }
1da177e4 1022
d353eca4 1023 /* Find the boards defined from module args. */
1da177e4 1024#ifdef MODULE
d353eca4
JS		 1025 {
1026 struct moxa_board_conf *brd = moxa_boards;
810ab09b 1027 unsigned int i;
1da177e4 1028 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1029 if (!baseaddr[i])
1030 break;
1031 if (type[i] == MOXA_BOARD_C218_ISA ||
1032 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1033 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1034 isabrds + 1, moxa_brdname[type[i] - 1],
1035 baseaddr[i]);
1036 brd->boardType = type[i];
1037 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1038 numports[i];
1039 brd->busType = MOXA_BUS_TYPE_ISA;
24cb2335 1040 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
d353eca4 1041 if (!brd->basemem) {
eaa95a8d 1042 printk(KERN_ERR "MOXA: can't remap %lx\n",
d353eca4 1043 baseaddr[i]);
1da177e4
LT		 1044 continue;
1045 }
03718234
JS		 1046 if (moxa_init_board(brd, NULL)) {
1047 iounmap(brd->basemem);
1048 brd->basemem = NULL;
1049 continue;
1050 }
d353eca4 1051
bb9f910a
JS		 1052 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1053 "ready (%u ports, firmware loaded)\n",
1054 baseaddr[i], brd->numPorts);
1055
d353eca4
JS		 1056 brd++;
1057 isabrds++;
1da177e4
LT		 1058 }
1059 }
d353eca4 1060 }
1da177e4 1061#endif
a784bf7c 1062
1da177e4 1063#ifdef CONFIG_PCI
a784bf7c
JS		 1064 retval = pci_register_driver(&moxa_pci_driver);
1065 if (retval) {
eaa95a8d 1066 printk(KERN_ERR "Can't register MOXA pci driver!\n");
d353eca4 1067 if (isabrds)
a784bf7c 1068 retval = 0;
1da177e4
LT		 1069 }
1070#endif
a784bf7c 1071
a784bf7c 1072 return retval;
1da177e4
LT		 1073}
1074
1075static void __exit moxa_exit(void)
1076{
eaa95a8d 1077 unsigned int i;
1da177e4 1078
9cde5bf0 1079#ifdef CONFIG_PCI
a784bf7c 1080 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1081#endif
a784bf7c 1082
810ab09b
JS		 1083 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1084 if (moxa_boards[i].ready)
1085 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1086
1087 del_timer_sync(&moxaTimer);
1088
1089 if (tty_unregister_driver(moxaDriver))
1090 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1091 "serial driver\n");
1092 put_tty_driver(moxaDriver);
1da177e4
LT		 1093}
1094
1095module_init(moxa_init);
1096module_exit(moxa_exit);
1097
a8f5cda0
JS		 1098static void moxa_close_port(struct moxa_port *ch)
1099{
1100 moxa_shut_down(ch);
1101 MoxaPortFlushData(ch, 2);
9de6a51f
AC		 1102 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1103 ch->port.tty->driver_data = NULL;
1104 ch->port.tty = NULL;
a8f5cda0
JS		 1105}
1106
1107static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1108 struct moxa_port *ch)
1109{
1110 DEFINE_WAIT(wait);
1111 int retval = 0;
1112 u8 dcd;
1113
1114 while (1) {
9de6a51f 1115 prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE);
a8f5cda0
JS		 1116 if (tty_hung_up_p(filp)) {
1117#ifdef SERIAL_DO_RESTART
1118 retval = -ERESTARTSYS;
1119#else
1120 retval = -EAGAIN;
1121#endif
1122 break;
1123 }
1124 spin_lock_bh(&moxa_lock);
1125 dcd = ch->DCDState;
1126 spin_unlock_bh(&moxa_lock);
1127 if (dcd)
1128 break;
1129
1130 if (signal_pending(current)) {
1131 retval = -ERESTARTSYS;
1132 break;
1133 }
1134 schedule();
1135 }
9de6a51f 1136 finish_wait(&ch->port.open_wait, &wait);
a8f5cda0
JS		 1137
1138 return retval;
1139}
1140
1da177e4
LT		 1141static int moxa_open(struct tty_struct *tty, struct file *filp)
1142{
810ab09b 1143 struct moxa_board_conf *brd;
8f8ecbad 1144 struct moxa_port *ch;
1da177e4
LT		 1145 int port;
1146 int retval;
1da177e4 1147
11324edd 1148 port = tty->index;
1da177e4 1149 if (port == MAX_PORTS) {
74d7d97b 1150 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1151 }
a8f5cda0
JS		 1152 if (mutex_lock_interruptible(&moxa_openlock))
1153 return -ERESTARTSYS;
810ab09b 1154 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1155 if (!brd->ready) {
1156 mutex_unlock(&moxa_openlock);
810ab09b 1157 return -ENODEV;
a8f5cda0 1158 }
1da177e4 1159
810ab09b 1160 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
9de6a51f 1161 ch->port.count++;
1da177e4 1162 tty->driver_data = ch;
9de6a51f
AC		 1163 ch->port.tty = tty;
1164 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1da177e4 1165 ch->statusflags = 0;
db1acaa6 1166 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1167 MoxaPortLineCtrl(ch, 1, 1);
1168 MoxaPortEnable(ch);
a8f5cda0 1169 MoxaSetFifo(ch, ch->type == PORT_16550A);
9de6a51f 1170 ch->port.flags |= ASYNC_INITIALIZED;
1da177e4 1171 }
a8f5cda0 1172 mutex_unlock(&moxa_openlock);
1da177e4 1173
a8f5cda0
JS		 1174 retval = 0;
1175 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1176 retval = moxa_block_till_ready(tty, filp, ch);
1177 mutex_lock(&moxa_openlock);
1178 if (retval) {
9de6a51f
AC		 1179 if (ch->port.count) /* 0 means already hung up... */
1180 if (--ch->port.count == 0)
a8f5cda0
JS		 1181 moxa_close_port(ch);
1182 } else
9de6a51f 1183 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
a8f5cda0 1184 mutex_unlock(&moxa_openlock);
1da177e4 1185
a8f5cda0 1186 return retval;
1da177e4
LT		 1187}
1188
1189static void moxa_close(struct tty_struct *tty, struct file *filp)
1190{
8f8ecbad 1191 struct moxa_port *ch;
1da177e4
LT		 1192 int port;
1193
11324edd 1194 port = tty->index;
a8f5cda0 1195 if (port == MAX_PORTS || tty_hung_up_p(filp))
1da177e4 1196 return;
1da177e4 1197
a8f5cda0
JS		 1198 mutex_lock(&moxa_openlock);
1199 ch = tty->driver_data;
1200 if (ch == NULL)
1201 goto unlock;
9de6a51f 1202 if (tty->count == 1 && ch->port.count != 1) {
7aeb95da 1203 printk(KERN_WARNING "moxa_close: bad serial port count; "
9de6a51f
AC		 1204 "tty->count is 1, ch->port.count is %d\n", ch->port.count);
1205 ch->port.count = 1;
1da177e4 1206 }
9de6a51f 1207 if (--ch->port.count < 0) {
7aeb95da
JS		 1208 printk(KERN_WARNING "moxa_close: bad serial port count, "
1209 "device=%s\n", tty->name);
9de6a51f 1210 ch->port.count = 0;
1da177e4 1211 }
9de6a51f 1212 if (ch->port.count)
a8f5cda0 1213 goto unlock;
1da177e4
LT		 1214
1215 ch->cflag = tty->termios->c_cflag;
9de6a51f 1216 if (ch->port.flags & ASYNC_INITIALIZED) {
6f56b658 1217 moxa_setup_empty_event(tty);
1da177e4 1218 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1da177e4 1219 }
1da177e4 1220
a8f5cda0
JS		 1221 moxa_close_port(ch);
1222unlock:
1223 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1224}
1225
1226static int moxa_write(struct tty_struct *tty,
1227 const unsigned char *buf, int count)
1228{
b4173f45 1229 struct moxa_port *ch = tty->driver_data;
b4173f45 1230 int len;
1da177e4 1231
1da177e4 1232 if (ch == NULL)
b4173f45 1233 return 0;
33f0f88f 1234
7bcf97d1 1235 spin_lock_bh(&moxa_lock);
2108eba5 1236 len = MoxaPortWriteData(ch, buf, count);
7bcf97d1 1237 spin_unlock_bh(&moxa_lock);
1da177e4 1238
1da177e4 1239 ch->statusflags |= LOWWAIT;
eaa95a8d 1240 return len;
1da177e4
LT		 1241}
1242
1243static int moxa_write_room(struct tty_struct *tty)
1244{
8f8ecbad 1245 struct moxa_port *ch;
1da177e4
LT		 1246
1247 if (tty->stopped)
eaa95a8d 1248 return 0;
b4173f45 1249 ch = tty->driver_data;
1da177e4 1250 if (ch == NULL)
eaa95a8d 1251 return 0;
b4173f45 1252 return MoxaPortTxFree(ch);
1da177e4
LT		 1253}
1254
1255static void moxa_flush_buffer(struct tty_struct *tty)
1256{
b4173f45 1257 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1258
1259 if (ch == NULL)
1260 return;
b4173f45 1261 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1262 tty_wakeup(tty);
1263}
1264
1265static int moxa_chars_in_buffer(struct tty_struct *tty)
1266{
b4173f45 1267 struct moxa_port *ch = tty->driver_data;
1da177e4 1268 int chars;
1da177e4
LT		 1269
1270 /*
1271 * Sigh...I have to check if driver_data is NULL here, because
1272 * if an open() fails, the TTY subsystem eventually calls
1273 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1274 * routine. And since the open() failed, we return 0 here. TDJ
1275 */
1276 if (ch == NULL)
eaa95a8d 1277 return 0;
978e595f 1278 lock_kernel();
b4173f45 1279 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1280 if (chars) {
1281 /*
1282 * Make it possible to wakeup anything waiting for output
1283 * in tty_ioctl.c, etc.
1284 */
1285 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1286 moxa_setup_empty_event(tty);
1da177e4 1287 }
978e595f 1288 unlock_kernel();
eaa95a8d 1289 return chars;
1da177e4
LT		 1290}
1291
1da177e4
LT		 1292static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1293{
a8f5cda0 1294 struct moxa_port *ch;
1da177e4
LT		 1295 int flag = 0, dtr, rts;
1296
a8f5cda0
JS		 1297 mutex_lock(&moxa_openlock);
1298 ch = tty->driver_data;
1299 if (!ch) {
1300 mutex_unlock(&moxa_openlock);
74d7d97b 1301 return -EINVAL;
a8f5cda0 1302 }
1da177e4 1303
b4173f45 1304 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1305 if (dtr)
1306 flag |= TIOCM_DTR;
1307 if (rts)
1308 flag |= TIOCM_RTS;
b4173f45 1309 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1310 if (dtr & 1)
1311 flag |= TIOCM_CTS;
1312 if (dtr & 2)
1313 flag |= TIOCM_DSR;
1314 if (dtr & 4)
1315 flag |= TIOCM_CD;
a8f5cda0 1316 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1317 return flag;
1318}
1319
1320static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1321 unsigned int set, unsigned int clear)
1322{
a8f5cda0 1323 struct moxa_port *ch;
1da177e4
LT		 1324 int port;
1325 int dtr, rts;
1326
11324edd 1327 port = tty->index;
a8f5cda0
JS		 1328 mutex_lock(&moxa_openlock);
1329 ch = tty->driver_data;
1330 if (!ch) {
1331 mutex_unlock(&moxa_openlock);
74d7d97b 1332 return -EINVAL;
a8f5cda0 1333 }
1da177e4 1334
b4173f45 1335 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1336 if (set & TIOCM_RTS)
1337 rts = 1;
1338 if (set & TIOCM_DTR)
1339 dtr = 1;
1340 if (clear & TIOCM_RTS)
1341 rts = 0;
1342 if (clear & TIOCM_DTR)
1343 dtr = 0;
b4173f45 1344 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1345 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1346 return 0;
1347}
1348
1da177e4
LT		 1349static void moxa_throttle(struct tty_struct *tty)
1350{
eaa95a8d 1351 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1352
1353 ch->statusflags |= THROTTLE;
1354}
1355
1356static void moxa_unthrottle(struct tty_struct *tty)
1357{
eaa95a8d 1358 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1359
1360 ch->statusflags &= ~THROTTLE;
1361}
1362
1363static void moxa_set_termios(struct tty_struct *tty,
eaa95a8d 1364 struct ktermios *old_termios)
1da177e4 1365{
eaa95a8d 1366 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1367
1368 if (ch == NULL)
1369 return;
db1acaa6 1370 moxa_set_tty_param(tty, old_termios);
eaa95a8d 1371 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
9de6a51f 1372 wake_up_interruptible(&ch->port.open_wait);
1da177e4
LT		 1373}
1374
1375static void moxa_stop(struct tty_struct *tty)
1376{
eaa95a8d 1377 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1378
1379 if (ch == NULL)
1380 return;
b4173f45 1381 MoxaPortTxDisable(ch);
1da177e4
LT		 1382 ch->statusflags |= TXSTOPPED;
1383}
1384
1385
1386static void moxa_start(struct tty_struct *tty)
1387{
eaa95a8d 1388 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1389
1390 if (ch == NULL)
1391 return;
1392
1393 if (!(ch->statusflags & TXSTOPPED))
1394 return;
1395
b4173f45 1396 MoxaPortTxEnable(ch);
1da177e4
LT		 1397 ch->statusflags &= ~TXSTOPPED;
1398}
1399
1400static void moxa_hangup(struct tty_struct *tty)
1401{
a8f5cda0 1402 struct moxa_port *ch;
1da177e4 1403
a8f5cda0
JS		 1404 mutex_lock(&moxa_openlock);
1405 ch = tty->driver_data;
1406 if (ch == NULL) {
1407 mutex_unlock(&moxa_openlock);
1408 return;
1409 }
9de6a51f 1410 ch->port.count = 0;
a8f5cda0
JS		 1411 moxa_close_port(ch);
1412 mutex_unlock(&moxa_openlock);
1413
9de6a51f 1414 wake_up_interruptible(&ch->port.open_wait);
1da177e4
LT		 1415}
1416
7bcf97d1 1417static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1418{
7bcf97d1 1419 dcd = !!dcd;
1da177e4 1420
9de6a51f 1421 if (dcd != p->DCDState && p->port.tty && C_CLOCAL(p->port.tty)) {
a8f5cda0 1422 if (!dcd)
9de6a51f 1423 tty_hangup(p->port.tty);
7bcf97d1
JS		 1424 }
1425 p->DCDState = dcd;
1426}
1da177e4 1427
7bcf97d1
JS		 1428static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1429 u16 __iomem *ip)
1430{
9de6a51f 1431 struct tty_struct *tty = p->port.tty;
7bcf97d1 1432 void __iomem *ofsAddr;
9de6a51f 1433 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
7bcf97d1
JS		 1434 u16 intr;
1435
1436 if (tty) {
1437 if ((p->statusflags & EMPTYWAIT) &&
1438 MoxaPortTxQueue(p) == 0) {
1439 p->statusflags &= ~EMPTYWAIT;
1440 tty_wakeup(tty);
1441 }
1442 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1443 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1444 p->statusflags &= ~LOWWAIT;
1445 tty_wakeup(tty);
1446 }
1447
1448 if (inited && !(p->statusflags & THROTTLE) &&
1449 MoxaPortRxQueue(p) > 0) { /* RX */
1450 MoxaPortReadData(p);
1451 tty_schedule_flip(tty);
1452 }
1453 } else {
1454 p->statusflags &= ~EMPTYWAIT;
1455 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1456 }
0bcc4caa 1457
7bcf97d1
JS		 1458 if (!handle) /* nothing else to do */
1459 return 0;
1460
1461 intr = readw(ip); /* port irq status */
1462 if (intr == 0)
1463 return 0;
1464
1465 writew(0, ip); /* ACK port */
1466 ofsAddr = p->tableAddr;
1467 if (intr & IntrTx) /* disable tx intr */
1468 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1469 ofsAddr + HostStat);
1470
1471 if (!inited)
1472 return 0;
1473
1474 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1475 tty_insert_flip_char(tty, 0, TTY_BREAK);
1476 tty_schedule_flip(tty);
1477 }
1478
1479 if (intr & IntrLine)
1480 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1481
1482 return 0;
1483}
1484
1485static void moxa_poll(unsigned long ignored)
1486{
1487 struct moxa_board_conf *brd;
1488 u16 __iomem *ip;
2a541341 1489 unsigned int card, port, served = 0;
7bcf97d1
JS		 1490
1491 spin_lock(&moxa_lock);
1da177e4 1492 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1493 brd = &moxa_boards[card];
1494 if (!brd->ready)
1da177e4 1495 continue;
7bcf97d1 1496
2a541341
JS		 1497 served++;
1498
7bcf97d1
JS		 1499 ip = NULL;
1500 if (readb(brd->intPend) == 0xff)
1501 ip = brd->intTable + readb(brd->intNdx);
1502
1503 for (port = 0; port < brd->numPorts; port++)
1504 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1505
1506 if (ip)
1507 writeb(0, brd->intPend); /* ACK */
1508
1509 if (moxaLowWaterChk) {
1510 struct moxa_port *p = brd->ports;
1511 for (port = 0; port < brd->numPorts; port++, p++)
1512 if (p->lowChkFlag) {
1513 p->lowChkFlag = 0;
1514 moxa_low_water_check(p->tableAddr);
1da177e4 1515 }
1da177e4
LT		 1516 }
1517 }
7bcf97d1 1518 moxaLowWaterChk = 0;
1da177e4 1519
2a541341
JS		 1520 if (served)
1521 mod_timer(&moxaTimer, jiffies + HZ / 50);
1522 spin_unlock(&moxa_lock);
1da177e4
LT		 1523}
1524
1525/******************************************************************************/
1526
db1acaa6 1527static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1528{
eaa95a8d
JS		 1529 register struct ktermios *ts = tty->termios;
1530 struct moxa_port *ch = tty->driver_data;
db1acaa6 1531 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1532
1da177e4
LT		 1533 rts = cts = txflow = rxflow = xany = 0;
1534 if (ts->c_cflag & CRTSCTS)
1535 rts = cts = 1;
1536 if (ts->c_iflag & IXON)
1537 txflow = 1;
1538 if (ts->c_iflag & IXOFF)
1539 rxflow = 1;
1540 if (ts->c_iflag & IXANY)
1541 xany = 1;
db1acaa6
AC		 1542
1543 /* Clear the features we don't support */
1544 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1545 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1546 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1547 if (baud == -1)
1548 baud = tty_termios_baud_rate(old_termios);
1549 /* Not put the baud rate into the termios data */
1550 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1551}
1552
6f56b658 1553static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1554{
8f8ecbad 1555 struct moxa_port *ch = tty->driver_data;
1da177e4 1556
7bcf97d1 1557 spin_lock_bh(&moxa_lock);
1da177e4 1558 ch->statusflags |= EMPTYWAIT;
7bcf97d1 1559 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1560}
1561
6f56b658 1562static void moxa_shut_down(struct moxa_port *ch)
1da177e4 1563{
9de6a51f 1564 struct tty_struct *tp = ch->port.tty;
1da177e4 1565
9de6a51f 1566 if (!(ch->port.flags & ASYNC_INITIALIZED))
1da177e4
LT		 1567 return;
1568
b4173f45 1569 MoxaPortDisable(ch);
1da177e4
LT		 1570
1571 /*
1572 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1573 */
a8f5cda0 1574 if (C_HUPCL(tp))
b4173f45 1575 MoxaPortLineCtrl(ch, 0, 0);
1da177e4 1576
a8f5cda0 1577 spin_lock_bh(&moxa_lock);
9de6a51f 1578 ch->port.flags &= ~ASYNC_INITIALIZED;
a8f5cda0 1579 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1580}
1581
1da177e4
LT		 1582/*****************************************************************************
1583 * Driver level functions: *
1da177e4 1584 *****************************************************************************/
1da177e4 1585
b4173f45 1586static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1587{
1588 void __iomem *ofsAddr;
eaa95a8d 1589 if (mode < 0 || mode > 2)
1da177e4 1590 return;
b4173f45 1591 ofsAddr = port->tableAddr;
1da177e4
LT		 1592 moxafunc(ofsAddr, FC_FlushQueue, mode);
1593 if (mode != 1) {
b4173f45 1594 port->lowChkFlag = 0;
6f56b658 1595 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1596 }
1597}
1598
1da177e4
LT		 1599/*
1600 * Moxa Port Number Description:
1601 *
1602 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1603 * the port number using in MOXA driver functions will be 0 to 31 for
1604 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1605 * to 127 for fourth. For example, if you setup three MOXA boards,
1606 * first board is C218, second board is C320-16 and third board is
1607 * C320-32. The port number of first board (C218 - 8 ports) is from
1608 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1609 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1610 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1611 * 127 will be invalid.
1612 *
1613 *
1614 * Moxa Functions Description:
1615 *
1616 * Function 1: Driver initialization routine, this routine must be
1617 * called when initialized driver.
1618 * Syntax:
1619 * void MoxaDriverInit();
1620 *
1621 *
1622 * Function 2: Moxa driver private IOCTL command processing.
1623 * Syntax:
1624 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1625 *
1626 * unsigned int cmd : IOCTL command
1627 * unsigned long arg : IOCTL argument
1628 * int port : port number (0 - 127)
1629 *
1630 * return: 0 (OK)
1631 * -EINVAL
1632 * -ENOIOCTLCMD
1633 *
1634 *
1da177e4
LT		 1635 * Function 6: Enable this port to start Tx/Rx data.
1636 * Syntax:
1637 * void MoxaPortEnable(int port);
1638 * int port : port number (0 - 127)
1639 *
1640 *
1641 * Function 7: Disable this port
1642 * Syntax:
1643 * void MoxaPortDisable(int port);
1644 * int port : port number (0 - 127)
1645 *
1646 *
1da177e4
LT		 1647 * Function 10: Setting baud rate of this port.
1648 * Syntax:
08d01c79 1649 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1da177e4
LT		 1650 * int port : port number (0 - 127)
1651 * long baud : baud rate (50 - 115200)
1652 *
1653 * return: 0 : this port is invalid or baud < 50
1654 * 50 - 115200 : the real baud rate set to the port, if
1655 * the argument baud is large than maximun
1656 * available baud rate, the real setting
1657 * baud rate will be the maximun baud rate.
1658 *
1659 *
1da177e4
LT		 1660 * Function 12: Configure the port.
1661 * Syntax:
606d099c 1662 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1663 * int port : port number (0 - 127)
606d099c 1664 * struct ktermios * termio : termio structure pointer
c7bce309 1665 * speed_t baud : baud rate
1da177e4
LT		 1666 *
1667 * return: -1 : this port is invalid or termio == NULL
1668 * 0 : setting O.K.
1669 *
1670 *
1671 * Function 13: Get the DTR/RTS state of this port.
1672 * Syntax:
1673 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1674 * int port : port number (0 - 127)
1675 * int * dtrState : pointer to INT to receive the current DTR
1676 * state. (if NULL, this function will not
1677 * write to this address)
1678 * int * rtsState : pointer to INT to receive the current RTS
1679 * state. (if NULL, this function will not
1680 * write to this address)
1681 *
1682 * return: -1 : this port is invalid
1683 * 0 : O.K.
1684 *
1685 *
1686 * Function 14: Setting the DTR/RTS output state of this port.
1687 * Syntax:
1688 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1689 * int port : port number (0 - 127)
1690 * int dtrState : DTR output state (0: off, 1: on)
1691 * int rtsState : RTS output state (0: off, 1: on)
1692 *
1693 *
1694 * Function 15: Setting the flow control of this port.
1695 * Syntax:
1696 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1697 * int txFlow,int xany);
1698 * int port : port number (0 - 127)
1699 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1700 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1701 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1702 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1703 * int xany : S/W XANY flow control (0: no, 1: yes)
1704 *
1705 *
1706 * Function 16: Get ths line status of this port
1707 * Syntax:
1708 * int MoxaPortLineStatus(int port);
1709 * int port : port number (0 - 127)
1710 *
1711 * return: Bit 0 - CTS state (0: off, 1: on)
1712 * Bit 1 - DSR state (0: off, 1: on)
1713 * Bit 2 - DCD state (0: off, 1: on)
1714 *
1715 *
1da177e4
LT		 1716 * Function 19: Flush the Rx/Tx buffer data of this port.
1717 * Syntax:
1718 * void MoxaPortFlushData(int port, int mode);
1719 * int port : port number (0 - 127)
1720 * int mode
1721 * 0 : flush the Rx buffer
1722 * 1 : flush the Tx buffer
1723 * 2 : flush the Rx and Tx buffer
1724 *
1725 *
1726 * Function 20: Write data.
1727 * Syntax:
1728 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1729 * int port : port number (0 - 127)
1730 * unsigned char * buffer : pointer to write data buffer.
1731 * int length : write data length
1732 *
1733 * return: 0 - length : real write data length
1734 *
1735 *
1736 * Function 21: Read data.
1737 * Syntax:
33f0f88f 1738 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1739 * int port : port number (0 - 127)
33f0f88f 1740 * struct tty_struct *tty : tty for data
1da177e4
LT		 1741 *
1742 * return: 0 - length : real read data length
1743 *
1744 *
1da177e4
LT		 1745 * Function 24: Get the Tx buffer current queued data bytes
1746 * Syntax:
1747 * int MoxaPortTxQueue(int port);
1748 * int port : port number (0 - 127)
1749 *
1750 * return: .. : Tx buffer current queued data bytes
1751 *
1752 *
1753 * Function 25: Get the Tx buffer current free space
1754 * Syntax:
1755 * int MoxaPortTxFree(int port);
1756 * int port : port number (0 - 127)
1757 *
1758 * return: .. : Tx buffer current free space
1759 *
1760 *
1761 * Function 26: Get the Rx buffer current queued data bytes
1762 * Syntax:
1763 * int MoxaPortRxQueue(int port);
1764 * int port : port number (0 - 127)
1765 *
1766 * return: .. : Rx buffer current queued data bytes
1767 *
1768 *
1da177e4
LT		 1769 * Function 28: Disable port data transmission.
1770 * Syntax:
1771 * void MoxaPortTxDisable(int port);
1772 * int port : port number (0 - 127)
1773 *
1774 *
1775 * Function 29: Enable port data transmission.
1776 * Syntax:
1777 * void MoxaPortTxEnable(int port);
1778 * int port : port number (0 - 127)
1779 *
1780 *
1da177e4
LT		 1781 * Function 31: Get the received BREAK signal count and reset it.
1782 * Syntax:
1783 * int MoxaPortResetBrkCnt(int port);
1784 * int port : port number (0 - 127)
1785 *
1786 * return: 0 - .. : BREAK signal count
1787 *
1788 *
1da177e4 1789 */
1da177e4 1790
b4173f45 1791static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1792{
1793 void __iomem *ofsAddr;
eaa95a8d 1794 u16 lowwater = 512;
1da177e4 1795
b4173f45 1796 ofsAddr = port->tableAddr;
1da177e4 1797 writew(lowwater, ofsAddr + Low_water);
08d01c79 1798 if (MOXA_IS_320(port->board))
1da177e4 1799 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
eaa95a8d
JS		 1800 else
1801 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1802 ofsAddr + HostStat);
1da177e4
LT		 1803
1804 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1805 moxafunc(ofsAddr, FC_FlushQueue, 2);
1806
1807 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1808 MoxaPortLineStatus(port);
1809}
1810
b4173f45 1811static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1812{
b4173f45 1813 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1814
1815 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1816 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1817 writew(0, ofsAddr + HostStat);
1818 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1819}
1820
08d01c79 1821static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1da177e4 1822{
08d01c79
JS		 1823 void __iomem *ofsAddr = port->tableAddr;
1824 unsigned int clock, val;
1825 speed_t max;
1da177e4 1826
08d01c79
JS		 1827 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1828 if (baud < 50)
eaa95a8d 1829 return 0;
1da177e4
LT		 1830 if (baud > max)
1831 baud = max;
08d01c79 1832 clock = 921600;
1da177e4
LT		 1833 val = clock / baud;
1834 moxafunc(ofsAddr, FC_SetBaud, val);
1835 baud = clock / val;
eaa95a8d 1836 return baud;
1da177e4
LT		 1837}
1838
b4173f45
JS		 1839static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1840 speed_t baud)
1da177e4
LT		 1841{
1842 void __iomem *ofsAddr;
1843 tcflag_t cflag;
1da177e4
LT		 1844 tcflag_t mode = 0;
1845
b4173f45 1846 ofsAddr = port->tableAddr;
1da177e4
LT		 1847 cflag = termio->c_cflag; /* termio->c_cflag */
1848
1849 mode = termio->c_cflag & CSIZE;
1850 if (mode == CS5)
1851 mode = MX_CS5;
1852 else if (mode == CS6)
1853 mode = MX_CS6;
1854 else if (mode == CS7)
1855 mode = MX_CS7;
1856 else if (mode == CS8)
1857 mode = MX_CS8;
1858
1859 if (termio->c_cflag & CSTOPB) {
1860 if (mode == MX_CS5)
1861 mode |= MX_STOP15;
1862 else
1863 mode |= MX_STOP2;
1864 } else
1865 mode |= MX_STOP1;
1866
1867 if (termio->c_cflag & PARENB) {
1868 if (termio->c_cflag & PARODD)
1869 mode |= MX_PARODD;
1870 else
1871 mode |= MX_PAREVEN;
1872 } else
1873 mode |= MX_PARNONE;
1874
eaa95a8d 1875 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1da177e4 1876
08d01c79
JS		 1877 if (MOXA_IS_320(port->board) && baud >= 921600)
1878 return -1;
1879
db1acaa6 1880 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1881
1882 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1883 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1884 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1885 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1886 moxa_wait_finish(ofsAddr);
1da177e4
LT		 1887
1888 }
eaa95a8d 1889 return baud;
1da177e4
LT		 1890}
1891
b4173f45
JS		 1892static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1893 int *rtsState)
1da177e4 1894{
b4173f45
JS		 1895 if (dtrState)
1896 *dtrState = !!(port->lineCtrl & DTR_ON);
1897 if (rtsState)
1898 *rtsState = !!(port->lineCtrl & RTS_ON);
1899
eaa95a8d 1900 return 0;
1da177e4
LT		 1901}
1902
b4173f45 1903static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1904{
eaa95a8d 1905 u8 mode = 0;
1da177e4 1906
1da177e4
LT		 1907 if (dtr)
1908 mode |= DTR_ON;
1909 if (rts)
1910 mode |= RTS_ON;
b4173f45
JS		 1911 port->lineCtrl = mode;
1912 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1913}
1914
b4173f45
JS		 1915static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1916 int txflow, int rxflow, int txany)
1da177e4 1917{
b4173f45 1918 int mode = 0;
1da177e4 1919
1da177e4
LT		 1920 if (rts)
1921 mode |= RTS_FlowCtl;
1922 if (cts)
1923 mode |= CTS_FlowCtl;
1924 if (txflow)
1925 mode |= Tx_FlowCtl;
1926 if (rxflow)
1927 mode |= Rx_FlowCtl;
1928 if (txany)
1929 mode |= IXM_IXANY;
b4173f45 1930 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 1931}
1932
b4173f45 1933static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 1934{
1935 void __iomem *ofsAddr;
1936 int val;
1937
b4173f45 1938 ofsAddr = port->tableAddr;
08d01c79 1939 if (MOXA_IS_320(port->board)) {
1da177e4
LT		 1940 moxafunc(ofsAddr, FC_LineStatus, 0);
1941 val = readw(ofsAddr + FuncArg);
1942 } else {
1943 val = readw(ofsAddr + FlagStat) >> 4;
1944 }
1945 val &= 0x0B;
7bcf97d1 1946 if (val & 8)
1da177e4 1947 val |= 4;
a8f5cda0 1948 spin_lock_bh(&moxa_lock);
7bcf97d1 1949 moxa_new_dcdstate(port, val & 8);
a8f5cda0 1950 spin_unlock_bh(&moxa_lock);
1da177e4 1951 val &= 7;
7bcf97d1 1952 return val;
1da177e4
LT		 1953}
1954
2108eba5
JS		 1955static int MoxaPortWriteData(struct moxa_port *port,
1956 const unsigned char *buffer, int len)
1da177e4 1957{
1da177e4 1958 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1959 unsigned int c, total;
1960 u16 head, tail, tx_mask, spage, epage;
1961 u16 pageno, pageofs, bufhead;
1da177e4 1962
b4173f45
JS		 1963 ofsAddr = port->tableAddr;
1964 baseAddr = port->board->basemem;
1da177e4
LT		 1965 tx_mask = readw(ofsAddr + TX_mask);
1966 spage = readw(ofsAddr + Page_txb);
1967 epage = readw(ofsAddr + EndPage_txb);
1968 tail = readw(ofsAddr + TXwptr);
1969 head = readw(ofsAddr + TXrptr);
2108eba5 1970 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 1971 if (c > len)
1972 c = len;
9de6a51f 1973 moxaLog.txcnt[port->port.tty->index] += c;
1da177e4
LT		 1974 total = c;
1975 if (spage == epage) {
1976 bufhead = readw(ofsAddr + Ofs_txb);
1977 writew(spage, baseAddr + Control_reg);
1978 while (c > 0) {
1979 if (head > tail)
1980 len = head - tail - 1;
1981 else
1982 len = tx_mask + 1 - tail;
1983 len = (c > len) ? len : c;
1984 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 1985 memcpy_toio(ofs, buffer, len);
1986 buffer += len;
1da177e4
LT		 1987 tail = (tail + len) & tx_mask;
1988 c -= len;
1989 }
1da177e4 1990 } else {
1da177e4
LT		 1991 pageno = spage + (tail >> 13);
1992 pageofs = tail & Page_mask;
2108eba5
JS		 1993 while (c > 0) {
1994 len = Page_size - pageofs;
1995 if (len > c)
1996 len = c;
1da177e4
LT		 1997 writeb(pageno, baseAddr + Control_reg);
1998 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1999 memcpy_toio(ofs, buffer, len);
2000 buffer += len;
1da177e4
LT		 2001 if (++pageno == epage)
2002 pageno = spage;
2003 pageofs = 0;
2108eba5
JS		 2004 c -= len;
2005 }
2006 tail = (tail + total) & tx_mask;
1da177e4 2007 }
2108eba5 2008 writew(tail, ofsAddr + TXwptr);
1da177e4 2009 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 2010 return total;
1da177e4
LT		 2011}
2012
7bcf97d1 2013static int MoxaPortReadData(struct moxa_port *port)
1da177e4 2014{
9de6a51f 2015 struct tty_struct *tty = port->port.tty;
2108eba5 2016 unsigned char *dst;
1da177e4 2017 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2018 unsigned int count, len, total;
2019 u16 tail, rx_mask, spage, epage;
2020 u16 pageno, pageofs, bufhead, head;
1da177e4 2021
b4173f45
JS		 2022 ofsAddr = port->tableAddr;
2023 baseAddr = port->board->basemem;
1da177e4
LT		 2024 head = readw(ofsAddr + RXrptr);
2025 tail = readw(ofsAddr + RXwptr);
2026 rx_mask = readw(ofsAddr + RX_mask);
2027 spage = readw(ofsAddr + Page_rxb);
2028 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 2029 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 2030 if (count == 0)
33f0f88f 2031 return 0;
1da177e4 2032
33f0f88f 2033 total = count;
7bcf97d1 2034 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 2035 if (spage == epage) {
2036 bufhead = readw(ofsAddr + Ofs_rxb);
2037 writew(spage, baseAddr + Control_reg);
2038 while (count > 0) {
1da177e4 2039 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 2040 len = (tail >= head) ? (tail - head) :
2041 (rx_mask + 1 - head);
2042 len = tty_prepare_flip_string(tty, &dst,
2043 min(len, count));
2044 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 2045 head = (head + len) & rx_mask;
2046 count -= len;
2047 }
1da177e4 2048 } else {
1da177e4
LT		 2049 pageno = spage + (head >> 13);
2050 pageofs = head & Page_mask;
2108eba5 2051 while (count > 0) {
1da177e4
LT		 2052 writew(pageno, baseAddr + Control_reg);
2053 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2054 len = tty_prepare_flip_string(tty, &dst,
2055 min(Page_size - pageofs, count));
2056 memcpy_fromio(dst, ofs, len);
2057
2058 count -= len;
2059 pageofs = (pageofs + len) & Page_mask;
2060 if (pageofs == 0 && ++pageno == epage)
1da177e4 2061 pageno = spage;
2108eba5
JS		 2062 }
2063 head = (head + total) & rx_mask;
1da177e4 2064 }
2108eba5
JS		 2065 writew(head, ofsAddr + RXrptr);
2066 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2067 moxaLowWaterChk = 1;
b4173f45 2068 port->lowChkFlag = 1;
1da177e4 2069 }
2108eba5 2070 return total;
1da177e4
LT		 2071}
2072
2073
b4173f45 2074static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2075{
b4173f45 2076 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2077 u16 rptr, wptr, mask;
1da177e4 2078
1da177e4
LT		 2079 rptr = readw(ofsAddr + TXrptr);
2080 wptr = readw(ofsAddr + TXwptr);
2081 mask = readw(ofsAddr + TX_mask);
2108eba5 2082 return (wptr - rptr) & mask;
1da177e4
LT		 2083}
2084
b4173f45 2085static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2086{
b4173f45 2087 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2088 u16 rptr, wptr, mask;
1da177e4 2089
1da177e4
LT		 2090 rptr = readw(ofsAddr + TXrptr);
2091 wptr = readw(ofsAddr + TXwptr);
2092 mask = readw(ofsAddr + TX_mask);
2108eba5 2093 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2094}
2095
b4173f45 2096static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2097{
b4173f45 2098 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2099 u16 rptr, wptr, mask;
1da177e4 2100
1da177e4
LT		 2101 rptr = readw(ofsAddr + RXrptr);
2102 wptr = readw(ofsAddr + RXwptr);
2103 mask = readw(ofsAddr + RX_mask);
2108eba5 2104 return (wptr - rptr) & mask;
1da177e4
LT		 2105}
2106
b4173f45 2107static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2108{
b4173f45 2109 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2110}
2111
b4173f45 2112static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2113{
b4173f45 2114 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2115}
2116
8f8ecbad 2117static int moxa_get_serial_info(struct moxa_port *info,
eaa95a8d 2118 struct serial_struct __user *retinfo)
1da177e4 2119{
eaa95a8d
JS		 2120 struct serial_struct tmp = {
2121 .type = info->type,
9de6a51f
AC		 2122 .line = info->port.tty->index,
2123 .flags = info->port.flags,
eaa95a8d 2124 .baud_base = 921600,
44b7d1b3 2125 .close_delay = info->port.close_delay
eaa95a8d
JS		 2126 };
2127 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1da177e4
LT		 2128}
2129
2130
8f8ecbad 2131static int moxa_set_serial_info(struct moxa_port *info,
eaa95a8d 2132 struct serial_struct __user *new_info)
1da177e4
LT		 2133{
2134 struct serial_struct new_serial;
2135
eaa95a8d 2136 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1da177e4
LT		 2137 return -EFAULT;
2138
eaa95a8d
JS		 2139 if (new_serial.irq != 0 || new_serial.port != 0 ||
2140 new_serial.custom_divisor != 0 ||
2141 new_serial.baud_base != 921600)
2142 return -EPERM;
1da177e4
LT		 2143
2144 if (!capable(CAP_SYS_ADMIN)) {
2145 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
9de6a51f 2146 (info->port.flags & ~ASYNC_USR_MASK)))
eaa95a8d
JS		 2147 return -EPERM;
2148 } else
44b7d1b3 2149 info->port.close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2150
2151 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
9de6a51f 2152 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
1da177e4 2153
eaa95a8d 2154 MoxaSetFifo(info, new_serial.type == PORT_16550A);
1da177e4
LT		 2155
2156 info->type = new_serial.type;
eaa95a8d 2157 return 0;
1da177e4
LT		 2158}
2159
2160
2161
2162/*****************************************************************************
2163 * Static local functions: *
2164 *****************************************************************************/
1da177e4 2165
b4173f45 2166static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2167{
b4173f45 2168 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2169
2170 if (!enable) {
2171 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2172 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2173 } else {
2174 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2175 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2176 }
2177}
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