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tty: moxa: Kill off the throttle method
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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>
405f5571 37#include <linux/smp_lock.h>
1da177e4
LT		 38#include <linux/string.h>
39#include <linux/fcntl.h>
40#include <linux/ptrace.h>
41#include <linux/serial.h>
42#include <linux/tty_driver.h>
43#include <linux/delay.h>
44#include <linux/pci.h>
45#include <linux/init.h>
46#include <linux/bitops.h>
47
48#include <asm/system.h>
49#include <asm/io.h>
50#include <asm/uaccess.h>
51
03718234
JS		 52#include "moxa.h"
53
b9705b60 54#define MOXA_VERSION "6.0k"
1da177e4 55
03718234
JS		 56#define MOXA_FW_HDRLEN 32
57
11324edd 58#define MOXAMAJOR 172
1da177e4 59
11324edd 60#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 61#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 62#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4 63
08d01c79
JS		 64#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
66
1da177e4
LT		 67/*
68 * Define the Moxa PCI vendor and device IDs.
69 */
11324edd
JS		 70#define MOXA_BUS_TYPE_ISA 0
71#define MOXA_BUS_TYPE_PCI 1
1da177e4 72
1da177e4
LT		 73enum {
74 MOXA_BOARD_C218_PCI = 1,
75 MOXA_BOARD_C218_ISA,
76 MOXA_BOARD_C320_PCI,
77 MOXA_BOARD_C320_ISA,
78 MOXA_BOARD_CP204J,
79};
80
81static char *moxa_brdname[] =
82{
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
87 "CP-204J series",
88};
89
90#ifdef CONFIG_PCI
91static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
93 .driver_data = MOXA_BOARD_C218_PCI },
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
95 .driver_data = MOXA_BOARD_C320_PCI },
96 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
97 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 98 { 0 }
99};
100MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
101#endif /* CONFIG_PCI */
102
03718234
JS		 103struct moxa_port;
104
8f8ecbad 105static struct moxa_board_conf {
1da177e4
LT		 106 int boardType;
107 int numPorts;
1da177e4 108 int busType;
8f8ecbad 109
810ab09b 110 unsigned int ready;
8f8ecbad 111
03718234
JS		 112 struct moxa_port *ports;
113
8f8ecbad
JS		 114 void __iomem *basemem;
115 void __iomem *intNdx;
116 void __iomem *intPend;
117 void __iomem *intTable;
118} moxa_boards[MAX_BOARDS];
119
120struct mxser_mstatus {
121 tcflag_t cflag;
122 int cts;
123 int dsr;
124 int ri;
125 int dcd;
9dff89cd 126};
1da177e4 127
8f8ecbad
JS		 128struct moxaq_str {
129 int inq;
130 int outq;
131};
1da177e4 132
8f8ecbad 133struct moxa_port {
9de6a51f 134 struct tty_port port;
b4173f45 135 struct moxa_board_conf *board;
7bcf97d1
JS		 136 void __iomem *tableAddr;
137
1da177e4 138 int type;
1da177e4 139 int cflag;
7bcf97d1 140 unsigned long statusflags;
1da177e4 141
7bcf97d1
JS		 142 u8 DCDState;
143 u8 lineCtrl;
144 u8 lowChkFlag;
8f8ecbad 145};
1da177e4 146
74d7d97b
JS		 147struct mon_str {
148 int tick;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
151};
152
1da177e4 153/* statusflags */
a808ac0c
AC		 154#define TXSTOPPED 1
155#define LOWWAIT 2
156#define EMPTYWAIT 3
1da177e4 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 *);
606d099c 196static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT		 197static void moxa_stop(struct tty_struct *);
198static void moxa_start(struct tty_struct *);
199static void moxa_hangup(struct tty_struct *);
200static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
201static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
202 unsigned int set, unsigned int clear);
203static void moxa_poll(unsigned long);
db1acaa6 204static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 205static void moxa_setup_empty_event(struct tty_struct *);
f176178b 206static void moxa_shutdown(struct tty_port *);
31f35939 207static int moxa_carrier_raised(struct tty_port *);
f176178b 208static void moxa_dtr_rts(struct tty_port *, int);
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);
d450b5a0 220static int MoxaPortWriteData(struct tty_struct *, 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
a808ac0c
AC		 235static DEFINE_SPINLOCK(moxafunc_lock);
236
74d7d97b
JS		 237static void moxa_wait_finish(void __iomem *ofsAddr)
238{
239 unsigned long end = jiffies + moxaFuncTout;
240
241 while (readw(ofsAddr + FuncCode) != 0)
242 if (time_after(jiffies, end))
243 return;
244 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
245 printk(KERN_WARNING "moxa function expired\n");
246}
247
eaa95a8d 248static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
74d7d97b 249{
f5c5a36d
AC		 250 unsigned long flags;
251 spin_lock_irqsave(&moxafunc_lock, flags);
74d7d97b
JS		 252 writew(arg, ofsAddr + FuncArg);
253 writew(cmd, ofsAddr + FuncCode);
254 moxa_wait_finish(ofsAddr);
f5c5a36d
AC		 255 spin_unlock_irqrestore(&moxafunc_lock, flags);
256}
257
258static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
259{
260 unsigned long flags;
261 u16 ret;
262 spin_lock_irqsave(&moxafunc_lock, flags);
263 writew(arg, ofsAddr + FuncArg);
264 writew(cmd, ofsAddr + FuncCode);
265 moxa_wait_finish(ofsAddr);
266 ret = readw(ofsAddr + FuncArg);
267 spin_unlock_irqrestore(&moxafunc_lock, flags);
268 return ret;
74d7d97b
JS		 269}
270
7bcf97d1
JS		 271static void moxa_low_water_check(void __iomem *ofsAddr)
272{
273 u16 rptr, wptr, mask, len;
274
275 if (readb(ofsAddr + FlagStat) & Xoff_state) {
276 rptr = readw(ofsAddr + RXrptr);
277 wptr = readw(ofsAddr + RXwptr);
278 mask = readw(ofsAddr + RX_mask);
279 len = (wptr - rptr) & mask;
280 if (len <= Low_water)
281 moxafunc(ofsAddr, FC_SendXon, 0);
282 }
283}
284
74d7d97b
JS		 285/*
286 * TTY operations
287 */
288
289static int moxa_ioctl(struct tty_struct *tty, struct file *file,
290 unsigned int cmd, unsigned long arg)
291{
292 struct moxa_port *ch = tty->driver_data;
293 void __user *argp = (void __user *)arg;
a8f5cda0 294 int status, ret = 0;
74d7d97b
JS		 295
296 if (tty->index == MAX_PORTS) {
297 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
298 cmd != MOXA_GETMSTATUS)
299 return -EINVAL;
300 } else if (!ch)
301 return -ENODEV;
302
303 switch (cmd) {
304 case MOXA_GETDATACOUNT:
305 moxaLog.tick = jiffies;
a8f5cda0
JS		 306 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
307 ret = -EFAULT;
308 break;
74d7d97b
JS		 309 case MOXA_FLUSH_QUEUE:
310 MoxaPortFlushData(ch, arg);
a8f5cda0 311 break;
74d7d97b
JS		 312 case MOXA_GET_IOQUEUE: {
313 struct moxaq_str __user *argm = argp;
314 struct moxaq_str tmp;
315 struct moxa_port *p;
316 unsigned int i, j;
317
a8f5cda0 318 mutex_lock(&moxa_openlock);
74d7d97b
JS		 319 for (i = 0; i < MAX_BOARDS; i++) {
320 p = moxa_boards[i].ports;
321 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
322 memset(&tmp, 0, sizeof(tmp));
323 if (moxa_boards[i].ready) {
324 tmp.inq = MoxaPortRxQueue(p);
325 tmp.outq = MoxaPortTxQueue(p);
326 }
a8f5cda0
JS		 327 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
328 mutex_unlock(&moxa_openlock);
74d7d97b 329 return -EFAULT;
a8f5cda0 330 }
74d7d97b
JS		 331 }
332 }
a8f5cda0
JS		 333 mutex_unlock(&moxa_openlock);
334 break;
74d7d97b
JS		 335 } case MOXA_GET_OQUEUE:
336 status = MoxaPortTxQueue(ch);
a8f5cda0
JS		 337 ret = put_user(status, (unsigned long __user *)argp);
338 break;
74d7d97b
JS		 339 case MOXA_GET_IQUEUE:
340 status = MoxaPortRxQueue(ch);
a8f5cda0
JS		 341 ret = put_user(status, (unsigned long __user *)argp);
342 break;
74d7d97b
JS		 343 case MOXA_GETMSTATUS: {
344 struct mxser_mstatus __user *argm = argp;
345 struct mxser_mstatus tmp;
346 struct moxa_port *p;
347 unsigned int i, j;
348
a8f5cda0 349 mutex_lock(&moxa_openlock);
74d7d97b
JS		 350 for (i = 0; i < MAX_BOARDS; i++) {
351 p = moxa_boards[i].ports;
352 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
d450b5a0 353 struct tty_struct *ttyp;
74d7d97b
JS		 354 memset(&tmp, 0, sizeof(tmp));
355 if (!moxa_boards[i].ready)
356 goto copy;
357
358 status = MoxaPortLineStatus(p);
359 if (status & 1)
360 tmp.cts = 1;
361 if (status & 2)
362 tmp.dsr = 1;
363 if (status & 4)
364 tmp.dcd = 1;
365
d450b5a0
AC		 366 ttyp = tty_port_tty_get(&p->port);
367 if (!ttyp || !ttyp->termios)
74d7d97b
JS		 368 tmp.cflag = p->cflag;
369 else
d450b5a0
AC		 370 tmp.cflag = ttyp->termios->c_cflag;
371 tty_kref_put(tty);
74d7d97b 372copy:
a8f5cda0
JS		 373 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
374 mutex_unlock(&moxa_openlock);
74d7d97b 375 return -EFAULT;
a8f5cda0 376 }
74d7d97b
JS		 377 }
378 }
a8f5cda0
JS		 379 mutex_unlock(&moxa_openlock);
380 break;
74d7d97b
JS		 381 }
382 case TIOCGSERIAL:
a808ac0c 383 mutex_lock(&ch->port.mutex);
a8f5cda0 384 ret = moxa_get_serial_info(ch, argp);
a808ac0c 385 mutex_unlock(&ch->port.mutex);
a8f5cda0 386 break;
74d7d97b 387 case TIOCSSERIAL:
a808ac0c 388 mutex_lock(&ch->port.mutex);
a8f5cda0 389 ret = moxa_set_serial_info(ch, argp);
a808ac0c 390 mutex_unlock(&ch->port.mutex);
a8f5cda0
JS		 391 break;
392 default:
393 ret = -ENOIOCTLCMD;
74d7d97b 394 }
a8f5cda0 395 return ret;
74d7d97b
JS		 396}
397
9e98966c 398static int moxa_break_ctl(struct tty_struct *tty, int state)
74d7d97b
JS		 399{
400 struct moxa_port *port = tty->driver_data;
401
402 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
403 Magic_code);
9e98966c 404 return 0;
74d7d97b
JS		 405}
406
b68e31d0 407static const struct tty_operations moxa_ops = {
1da177e4
LT		 408 .open = moxa_open,
409 .close = moxa_close,
410 .write = moxa_write,
411 .write_room = moxa_write_room,
412 .flush_buffer = moxa_flush_buffer,
413 .chars_in_buffer = moxa_chars_in_buffer,
1da177e4 414 .ioctl = moxa_ioctl,
1da177e4
LT		 415 .set_termios = moxa_set_termios,
416 .stop = moxa_stop,
417 .start = moxa_start,
418 .hangup = moxa_hangup,
74d7d97b 419 .break_ctl = moxa_break_ctl,
1da177e4
LT		 420 .tiocmget = moxa_tiocmget,
421 .tiocmset = moxa_tiocmset,
422};
423
31f35939
AC		 424static const struct tty_port_operations moxa_port_ops = {
425 .carrier_raised = moxa_carrier_raised,
f176178b
AC		 426 .dtr_rts = moxa_dtr_rts,
427 .shutdown = moxa_shutdown,
31f35939
AC		 428};
429
aa7e5221 430static struct tty_driver *moxaDriver;
aa7e5221 431static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 432static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 433
74d7d97b
JS		 434/*
435 * HW init
436 */
437
03718234
JS		 438static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
439{
440 switch (brd->boardType) {
441 case MOXA_BOARD_C218_ISA:
442 case MOXA_BOARD_C218_PCI:
443 if (model != 1)
444 goto err;
445 break;
446 case MOXA_BOARD_CP204J:
447 if (model != 3)
448 goto err;
449 break;
450 default:
451 if (model != 2)
452 goto err;
453 break;
454 }
455 return 0;
456err:
457 return -EINVAL;
458}
459
460static int moxa_check_fw(const void *ptr)
461{
462 const __le16 *lptr = ptr;
463
464 if (*lptr != cpu_to_le16(0x7980))
465 return -EINVAL;
466
467 return 0;
468}
469
470static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
471 size_t len)
472{
473 void __iomem *baseAddr = brd->basemem;
474 u16 tmp;
475
476 writeb(HW_reset, baseAddr + Control_reg); /* reset */
477 msleep(10);
478 memset_io(baseAddr, 0, 4096);
479 memcpy_toio(baseAddr, buf, len); /* download BIOS */
480 writeb(0, baseAddr + Control_reg); /* restart */
481
482 msleep(2000);
483
484 switch (brd->boardType) {
485 case MOXA_BOARD_C218_ISA:
486 case MOXA_BOARD_C218_PCI:
487 tmp = readw(baseAddr + C218_key);
488 if (tmp != C218_KeyCode)
489 goto err;
490 break;
491 case MOXA_BOARD_CP204J:
492 tmp = readw(baseAddr + C218_key);
493 if (tmp != CP204J_KeyCode)
494 goto err;
495 break;
496 default:
497 tmp = readw(baseAddr + C320_key);
498 if (tmp != C320_KeyCode)
499 goto err;
500 tmp = readw(baseAddr + C320_status);
501 if (tmp != STS_init) {
eaa95a8d 502 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
03718234
JS		 503 "module not found\n");
504 return -EIO;
505 }
506 break;
507 }
508
509 return 0;
510err:
eaa95a8d 511 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
03718234
JS		 512 return -EIO;
513}
514
515static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
516 size_t len)
517{
518 void __iomem *baseAddr = brd->basemem;
519
520 if (len < 7168) {
eaa95a8d 521 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
03718234
JS		 522 return -EINVAL;
523 }
524
525 writew(len - 7168 - 2, baseAddr + C320bapi_len);
526 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
527 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
528 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
529 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
530
531 return 0;
532}
533
5292bcd3 534static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 535 size_t len)
536{
537 void __iomem *baseAddr = brd->basemem;
b46f69cd 538 const __le16 *uptr = ptr;
03718234 539 size_t wlen, len2, j;
5292bcd3 540 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
08d01c79 541 unsigned int i, retry;
03718234
JS		 542 u16 usum, keycode;
543
5292bcd3
JS		 544 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
545 C218_KeyCode;
03718234 546
5292bcd3
JS		 547 switch (brd->boardType) {
548 case MOXA_BOARD_CP204J:
549 case MOXA_BOARD_C218_ISA:
550 case MOXA_BOARD_C218_PCI:
551 key = C218_key;
552 loadbuf = C218_LoadBuf;
553 loadlen = C218DLoad_len;
554 checksum = C218check_sum;
555 checksum_ok = C218chksum_ok;
556 break;
557 default:
558 key = C320_key;
559 keycode = C320_KeyCode;
560 loadbuf = C320_LoadBuf;
561 loadlen = C320DLoad_len;
562 checksum = C320check_sum;
563 checksum_ok = C320chksum_ok;
564 break;
03718234 565 }
03718234
JS		 566
567 usum = 0;
568 wlen = len >> 1;
569 for (i = 0; i < wlen; i++)
570 usum += le16_to_cpu(uptr[i]);
571 retry = 0;
572 do {
573 wlen = len >> 1;
574 j = 0;
575 while (wlen) {
576 len2 = (wlen > 2048) ? 2048 : wlen;
577 wlen -= len2;
5292bcd3 578 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 579 j += len2 << 1;
5292bcd3
JS		 580
581 writew(len2, baseAddr + loadlen);
582 writew(0, baseAddr + key);
583 for (i = 0; i < 100; i++) {
584 if (readw(baseAddr + key) == keycode)
03718234
JS		 585 break;
586 msleep(10);
587 }
5292bcd3 588 if (readw(baseAddr + key) != keycode)
03718234
JS		 589 return -EIO;
590 }
5292bcd3
JS		 591 writew(0, baseAddr + loadlen);
592 writew(usum, baseAddr + checksum);
593 writew(0, baseAddr + key);
594 for (i = 0; i < 100; i++) {
595 if (readw(baseAddr + key) == keycode)
03718234
JS		 596 break;
597 msleep(10);
598 }
599 retry++;
5292bcd3
JS		 600 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
601 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 602 return -EIO;
603
5292bcd3 604 writew(0, baseAddr + key);
03718234
JS		 605 for (i = 0; i < 600; i++) {
606 if (readw(baseAddr + Magic_no) == Magic_code)
607 break;
608 msleep(10);
609 }
610 if (readw(baseAddr + Magic_no) != Magic_code)
611 return -EIO;
612
08d01c79 613 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 614 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
615 writew(0x3800, baseAddr + TMS320_PORT1);
616 writew(0x3900, baseAddr + TMS320_PORT2);
617 writew(28499, baseAddr + TMS320_CLOCK);
618 } else {
619 writew(0x3200, baseAddr + TMS320_PORT1);
620 writew(0x3400, baseAddr + TMS320_PORT2);
621 writew(19999, baseAddr + TMS320_CLOCK);
622 }
03718234
JS		 623 }
624 writew(1, baseAddr + Disable_IRQ);
625 writew(0, baseAddr + Magic_no);
626 for (i = 0; i < 500; i++) {
627 if (readw(baseAddr + Magic_no) == Magic_code)
628 break;
629 msleep(10);
630 }
631 if (readw(baseAddr + Magic_no) != Magic_code)
632 return -EIO;
633
08d01c79 634 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 635 j = readw(baseAddr + Module_cnt);
636 if (j <= 0)
637 return -EIO;
638 brd->numPorts = j * 8;
639 writew(j, baseAddr + Module_no);
640 writew(0, baseAddr + Magic_no);
641 for (i = 0; i < 600; i++) {
642 if (readw(baseAddr + Magic_no) == Magic_code)
643 break;
644 msleep(10);
645 }
646 if (readw(baseAddr + Magic_no) != Magic_code)
647 return -EIO;
03718234 648 }
03718234
JS		 649 brd->intNdx = baseAddr + IRQindex;
650 brd->intPend = baseAddr + IRQpending;
651 brd->intTable = baseAddr + IRQtable;
652
653 return 0;
654}
655
656static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
657 size_t len)
658{
659 void __iomem *ofsAddr, *baseAddr = brd->basemem;
660 struct moxa_port *port;
661 int retval, i;
662
663 if (len % 2) {
eaa95a8d 664 printk(KERN_ERR "MOXA: bios length is not even\n");
03718234
JS		 665 return -EINVAL;
666 }
667
5292bcd3
JS		 668 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
669 if (retval)
670 return retval;
671
03718234
JS		 672 switch (brd->boardType) {
673 case MOXA_BOARD_C218_ISA:
674 case MOXA_BOARD_C218_PCI:
675 case MOXA_BOARD_CP204J:
03718234
JS		 676 port = brd->ports;
677 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 678 port->board = brd;
03718234
JS		 679 port->DCDState = 0;
680 port->tableAddr = baseAddr + Extern_table +
681 Extern_size * i;
682 ofsAddr = port->tableAddr;
683 writew(C218rx_mask, ofsAddr + RX_mask);
684 writew(C218tx_mask, ofsAddr + TX_mask);
685 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
686 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
687
688 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
689 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
690
691 }
692 break;
693 default:
03718234
JS		 694 port = brd->ports;
695 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 696 port->board = brd;
03718234
JS		 697 port->DCDState = 0;
698 port->tableAddr = baseAddr + Extern_table +
699 Extern_size * i;
700 ofsAddr = port->tableAddr;
701 switch (brd->numPorts) {
702 case 8:
703 writew(C320p8rx_mask, ofsAddr + RX_mask);
704 writew(C320p8tx_mask, ofsAddr + TX_mask);
705 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
706 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
707 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
708 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
709
710 break;
711 case 16:
712 writew(C320p16rx_mask, ofsAddr + RX_mask);
713 writew(C320p16tx_mask, ofsAddr + TX_mask);
714 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
715 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
716 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
717 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
718 break;
719
720 case 24:
721 writew(C320p24rx_mask, ofsAddr + RX_mask);
722 writew(C320p24tx_mask, ofsAddr + TX_mask);
723 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
724 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
725 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
726 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
727 break;
728 case 32:
729 writew(C320p32rx_mask, ofsAddr + RX_mask);
730 writew(C320p32tx_mask, ofsAddr + TX_mask);
731 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
732 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
733 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
734 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
735 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
736 break;
737 }
738 }
739 break;
740 }
03718234
JS		 741 return 0;
742}
743
744static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
745{
2bca76e8 746 const void *ptr = fw->data;
03718234
JS		 747 char rsn[64];
748 u16 lens[5];
749 size_t len;
750 unsigned int a, lenp, lencnt;
751 int ret = -EINVAL;
752 struct {
753 __le32 magic; /* 0x34303430 */
754 u8 reserved1[2];
755 u8 type; /* UNIX = 3 */
756 u8 model; /* C218T=1, C320T=2, CP204=3 */
757 u8 reserved2[8];
758 __le16 len[5];
2bca76e8 759 } const *hdr = ptr;
03718234
JS		 760
761 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
762
763 if (fw->size < MOXA_FW_HDRLEN) {
764 strcpy(rsn, "too short (even header won't fit)");
765 goto err;
766 }
767 if (hdr->magic != cpu_to_le32(0x30343034)) {
768 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
769 goto err;
770 }
771 if (hdr->type != 3) {
772 sprintf(rsn, "not for linux, type is %u", hdr->type);
773 goto err;
774 }
775 if (moxa_check_fw_model(brd, hdr->model)) {
776 sprintf(rsn, "not for this card, model is %u", hdr->model);
777 goto err;
778 }
779
780 len = MOXA_FW_HDRLEN;
781 lencnt = hdr->model == 2 ? 5 : 3;
782 for (a = 0; a < ARRAY_SIZE(lens); a++) {
783 lens[a] = le16_to_cpu(hdr->len[a]);
784 if (lens[a] && len + lens[a] <= fw->size &&
785 moxa_check_fw(&fw->data[len]))
eaa95a8d 786 printk(KERN_WARNING "MOXA firmware: unexpected input "
03718234
JS		 787 "at offset %u, but going on\n", (u32)len);
788 if (!lens[a] && a < lencnt) {
789 sprintf(rsn, "too few entries in fw file");
790 goto err;
791 }
792 len += lens[a];
793 }
794
795 if (len != fw->size) {
796 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
797 (u32)len);
798 goto err;
799 }
800
801 ptr += MOXA_FW_HDRLEN;
802 lenp = 0; /* bios */
803
804 strcpy(rsn, "read above");
805
806 ret = moxa_load_bios(brd, ptr, lens[lenp]);
807 if (ret)
808 goto err;
809
810 /* we skip the tty section (lens[1]), since we don't need it */
811 ptr += lens[lenp] + lens[lenp + 1];
812 lenp += 2; /* comm */
813
814 if (hdr->model == 2) {
815 ret = moxa_load_320b(brd, ptr, lens[lenp]);
816 if (ret)
817 goto err;
818 /* skip another tty */
819 ptr += lens[lenp] + lens[lenp + 1];
820 lenp += 2;
821 }
822
823 ret = moxa_load_code(brd, ptr, lens[lenp]);
824 if (ret)
825 goto err;
826
827 return 0;
828err:
829 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
830 return ret;
831}
832
833static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
834{
835 const struct firmware *fw;
836 const char *file;
810ab09b
JS		 837 struct moxa_port *p;
838 unsigned int i;
03718234
JS		 839 int ret;
840
810ab09b
JS		 841 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
842 GFP_KERNEL);
843 if (brd->ports == NULL) {
844 printk(KERN_ERR "cannot allocate memory for ports\n");
845 ret = -ENOMEM;
846 goto err;
847 }
848
849 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
44b7d1b3 850 tty_port_init(&p->port);
31f35939 851 p->port.ops = &moxa_port_ops;
810ab09b 852 p->type = PORT_16550A;
810ab09b 853 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
810ab09b
JS		 854 }
855
03718234
JS		 856 switch (brd->boardType) {
857 case MOXA_BOARD_C218_ISA:
858 case MOXA_BOARD_C218_PCI:
859 file = "c218tunx.cod";
860 break;
861 case MOXA_BOARD_CP204J:
862 file = "cp204unx.cod";
863 break;
864 default:
865 file = "c320tunx.cod";
866 break;
867 }
868
869 ret = request_firmware(&fw, file, dev);
870 if (ret) {
ec09cd56
JS		 871 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
872 "you've placed '%s' file into your firmware "
873 "loader directory (e.g. /lib/firmware)\n",
874 file);
810ab09b 875 goto err_free;
03718234
JS		 876 }
877
878 ret = moxa_load_fw(brd, fw);
879
880 release_firmware(fw);
810ab09b
JS		 881
882 if (ret)
883 goto err_free;
884
2a541341 885 spin_lock_bh(&moxa_lock);
810ab09b 886 brd->ready = 1;
0bcc4caa
JS		 887 if (!timer_pending(&moxaTimer))
888 mod_timer(&moxaTimer, jiffies + HZ / 50);
2a541341 889 spin_unlock_bh(&moxa_lock);
0bcc4caa 890
810ab09b
JS		 891 return 0;
892err_free:
893 kfree(brd->ports);
894err:
03718234
JS		 895 return ret;
896}
897
810ab09b
JS		 898static void moxa_board_deinit(struct moxa_board_conf *brd)
899{
a8f5cda0
JS		 900 unsigned int a, opened;
901
902 mutex_lock(&moxa_openlock);
7bcf97d1 903 spin_lock_bh(&moxa_lock);
810ab09b 904 brd->ready = 0;
7bcf97d1 905 spin_unlock_bh(&moxa_lock);
a8f5cda0
JS		 906
907 /* pci hot-un-plug support */
908 for (a = 0; a < brd->numPorts; a++)
d450b5a0
AC		 909 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
910 struct tty_struct *tty = tty_port_tty_get(
911 &brd->ports[a].port);
912 if (tty) {
913 tty_hangup(tty);
914 tty_kref_put(tty);
915 }
916 }
a8f5cda0
JS		 917 while (1) {
918 opened = 0;
919 for (a = 0; a < brd->numPorts; a++)
9de6a51f 920 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
a8f5cda0
JS		 921 opened++;
922 mutex_unlock(&moxa_openlock);
923 if (!opened)
924 break;
925 msleep(50);
926 mutex_lock(&moxa_openlock);
927 }
928
810ab09b
JS		 929 iounmap(brd->basemem);
930 brd->basemem = NULL;
931 kfree(brd->ports);
932}
933
1da177e4 934#ifdef CONFIG_PCI
9cde5bf0
JS		 935static int __devinit moxa_pci_probe(struct pci_dev *pdev,
936 const struct pci_device_id *ent)
1da177e4 937{
9cde5bf0
JS		 938 struct moxa_board_conf *board;
939 unsigned int i;
940 int board_type = ent->driver_data;
941 int retval;
942
943 retval = pci_enable_device(pdev);
7aeb95da
JS		 944 if (retval) {
945 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 946 goto err;
7aeb95da 947 }
9cde5bf0
JS		 948
949 for (i = 0; i < MAX_BOARDS; i++)
950 if (moxa_boards[i].basemem == NULL)
951 break;
952
953 retval = -ENODEV;
954 if (i >= MAX_BOARDS) {
7aeb95da 955 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 956 "found. Board is ignored.\n", MAX_BOARDS);
957 goto err;
958 }
959
960 board = &moxa_boards[i];
e46a5e3f
JS		 961
962 retval = pci_request_region(pdev, 2, "moxa-base");
963 if (retval) {
964 dev_err(&pdev->dev, "can't request pci region 2\n");
965 goto err;
966 }
967
24cb2335 968 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 969 if (board->basemem == NULL) {
970 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 971 goto err_reg;
7aeb95da 972 }
9cde5bf0 973
1da177e4
LT		 974 board->boardType = board_type;
975 switch (board_type) {
976 case MOXA_BOARD_C218_ISA:
977 case MOXA_BOARD_C218_PCI:
978 board->numPorts = 8;
979 break;
980
981 case MOXA_BOARD_CP204J:
982 board->numPorts = 4;
983 break;
984 default:
985 board->numPorts = 0;
986 break;
987 }
988 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 989
03718234
JS		 990 retval = moxa_init_board(board, &pdev->dev);
991 if (retval)
992 goto err_base;
993
9cde5bf0 994 pci_set_drvdata(pdev, board);
1da177e4 995
bb9f910a
JS		 996 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
997 moxa_brdname[board_type - 1], board->numPorts);
998
eaa95a8d 999 return 0;
03718234
JS		 1000err_base:
1001 iounmap(board->basemem);
1002 board->basemem = NULL;
e46a5e3f
JS		 1003err_reg:
1004 pci_release_region(pdev, 2);
9cde5bf0
JS		 1005err:
1006 return retval;
1007}
1008
1009static void __devexit moxa_pci_remove(struct pci_dev *pdev)
1010{
1011 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1012
810ab09b
JS		 1013 moxa_board_deinit(brd);
1014
e46a5e3f 1015 pci_release_region(pdev, 2);
1da177e4 1016}
a784bf7c
JS		 1017
1018static struct pci_driver moxa_pci_driver = {
1019 .name = "moxa",
1020 .id_table = moxa_pcibrds,
1021 .probe = moxa_pci_probe,
1022 .remove = __devexit_p(moxa_pci_remove)
1023};
1da177e4
LT		 1024#endif /* CONFIG_PCI */
1025
1026static int __init moxa_init(void)
1027{
810ab09b 1028 unsigned int isabrds = 0;
d353eca4 1029 int retval = 0;
1da177e4 1030
7aeb95da
JS		 1031 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1032 MOXA_VERSION);
1da177e4
LT		 1033 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1034 if (!moxaDriver)
1035 return -ENOMEM;
1036
1da177e4 1037 moxaDriver->owner = THIS_MODULE;
9b4e3b13 1038 moxaDriver->name = "ttyMX";
1da177e4
LT		 1039 moxaDriver->major = ttymajor;
1040 moxaDriver->minor_start = 0;
1041 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1042 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1043 moxaDriver->init_termios = tty_std_termios;
1da177e4 1044 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1045 moxaDriver->init_termios.c_ispeed = 9600;
1046 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 1047 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1048 tty_set_operations(moxaDriver, &moxa_ops);
1049
1da177e4 1050 if (tty_register_driver(moxaDriver)) {
eaa95a8d 1051 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1da177e4
LT		 1052 put_tty_driver(moxaDriver);
1053 return -1;
1054 }
1da177e4 1055
d353eca4 1056 /* Find the boards defined from module args. */
1da177e4 1057#ifdef MODULE
d353eca4
JS		 1058 {
1059 struct moxa_board_conf *brd = moxa_boards;
810ab09b 1060 unsigned int i;
1da177e4 1061 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1062 if (!baseaddr[i])
1063 break;
1064 if (type[i] == MOXA_BOARD_C218_ISA ||
1065 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1066 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1067 isabrds + 1, moxa_brdname[type[i] - 1],
1068 baseaddr[i]);
1069 brd->boardType = type[i];
1070 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1071 numports[i];
1072 brd->busType = MOXA_BUS_TYPE_ISA;
24cb2335 1073 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
d353eca4 1074 if (!brd->basemem) {
eaa95a8d 1075 printk(KERN_ERR "MOXA: can't remap %lx\n",
d353eca4 1076 baseaddr[i]);
1da177e4
LT		 1077 continue;
1078 }
03718234
JS		 1079 if (moxa_init_board(brd, NULL)) {
1080 iounmap(brd->basemem);
1081 brd->basemem = NULL;
1082 continue;
1083 }
d353eca4 1084
bb9f910a
JS		 1085 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1086 "ready (%u ports, firmware loaded)\n",
1087 baseaddr[i], brd->numPorts);
1088
d353eca4
JS		 1089 brd++;
1090 isabrds++;
1da177e4
LT		 1091 }
1092 }
d353eca4 1093 }
1da177e4 1094#endif
a784bf7c 1095
1da177e4 1096#ifdef CONFIG_PCI
a784bf7c
JS		 1097 retval = pci_register_driver(&moxa_pci_driver);
1098 if (retval) {
eaa95a8d 1099 printk(KERN_ERR "Can't register MOXA pci driver!\n");
d353eca4 1100 if (isabrds)
a784bf7c 1101 retval = 0;
1da177e4
LT		 1102 }
1103#endif
a784bf7c 1104
a784bf7c 1105 return retval;
1da177e4
LT		 1106}
1107
1108static void __exit moxa_exit(void)
1109{
eaa95a8d 1110 unsigned int i;
1da177e4 1111
9cde5bf0 1112#ifdef CONFIG_PCI
a784bf7c 1113 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1114#endif
a784bf7c 1115
810ab09b
JS		 1116 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1117 if (moxa_boards[i].ready)
1118 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1119
1120 del_timer_sync(&moxaTimer);
1121
1122 if (tty_unregister_driver(moxaDriver))
1123 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1124 "serial driver\n");
1125 put_tty_driver(moxaDriver);
1da177e4
LT		 1126}
1127
1128module_init(moxa_init);
1129module_exit(moxa_exit);
1130
f176178b 1131static void moxa_shutdown(struct tty_port *port)
a8f5cda0 1132{
f176178b
AC		 1133 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1134 MoxaPortDisable(ch);
a8f5cda0 1135 MoxaPortFlushData(ch, 2);
f176178b 1136 clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
a8f5cda0
JS		 1137}
1138
31f35939
AC		 1139static int moxa_carrier_raised(struct tty_port *port)
1140{
1141 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1142 int dcd;
1143
1144 spin_lock_bh(&moxa_lock);
1145 dcd = ch->DCDState;
1146 spin_unlock_bh(&moxa_lock);
1147 return dcd;
1148}
1149
f176178b 1150static void moxa_dtr_rts(struct tty_port *port, int onoff)
a8f5cda0 1151{
f176178b
AC		 1152 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1153 MoxaPortLineCtrl(ch, onoff, onoff);
a8f5cda0
JS		 1154}
1155
f176178b 1156
1da177e4
LT		 1157static int moxa_open(struct tty_struct *tty, struct file *filp)
1158{
810ab09b 1159 struct moxa_board_conf *brd;
8f8ecbad 1160 struct moxa_port *ch;
1da177e4
LT		 1161 int port;
1162 int retval;
1da177e4 1163
11324edd 1164 port = tty->index;
1da177e4 1165 if (port == MAX_PORTS) {
74d7d97b 1166 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1167 }
a8f5cda0
JS		 1168 if (mutex_lock_interruptible(&moxa_openlock))
1169 return -ERESTARTSYS;
810ab09b 1170 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1171 if (!brd->ready) {
1172 mutex_unlock(&moxa_openlock);
810ab09b 1173 return -ENODEV;
a8f5cda0 1174 }
1da177e4 1175
f0e85277
DE		 1176 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1177 mutex_unlock(&moxa_openlock);
1178 return -ENODEV;
1179 }
1180
810ab09b 1181 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
9de6a51f 1182 ch->port.count++;
1da177e4 1183 tty->driver_data = ch;
d450b5a0 1184 tty_port_tty_set(&ch->port, tty);
f176178b 1185 mutex_lock(&ch->port.mutex);
9de6a51f 1186 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1da177e4 1187 ch->statusflags = 0;
db1acaa6 1188 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1189 MoxaPortLineCtrl(ch, 1, 1);
1190 MoxaPortEnable(ch);
a8f5cda0 1191 MoxaSetFifo(ch, ch->type == PORT_16550A);
9de6a51f 1192 ch->port.flags |= ASYNC_INITIALIZED;
1da177e4 1193 }
f176178b 1194 mutex_unlock(&ch->port.mutex);
a8f5cda0 1195 mutex_unlock(&moxa_openlock);
1da177e4 1196
f176178b
AC		 1197 retval = tty_port_block_til_ready(&ch->port, tty, filp);
1198 if (retval == 0)
1199 set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
a8f5cda0 1200 return retval;
1da177e4
LT		 1201}
1202
1203static void moxa_close(struct tty_struct *tty, struct file *filp)
1204{
f176178b 1205 struct moxa_port *ch = tty->driver_data;
1da177e4 1206 ch->cflag = tty->termios->c_cflag;
f176178b 1207 tty_port_close(&ch->port, tty, filp);
1da177e4
LT		 1208}
1209
1210static int moxa_write(struct tty_struct *tty,
1211 const unsigned char *buf, int count)
1212{
b4173f45 1213 struct moxa_port *ch = tty->driver_data;
b4173f45 1214 int len;
1da177e4 1215
1da177e4 1216 if (ch == NULL)
b4173f45 1217 return 0;
33f0f88f 1218
7bcf97d1 1219 spin_lock_bh(&moxa_lock);
d450b5a0 1220 len = MoxaPortWriteData(tty, buf, count);
7bcf97d1 1221 spin_unlock_bh(&moxa_lock);
1da177e4 1222
a808ac0c 1223 set_bit(LOWWAIT, &ch->statusflags);
eaa95a8d 1224 return len;
1da177e4
LT		 1225}
1226
1227static int moxa_write_room(struct tty_struct *tty)
1228{
8f8ecbad 1229 struct moxa_port *ch;
1da177e4
LT		 1230
1231 if (tty->stopped)
eaa95a8d 1232 return 0;
b4173f45 1233 ch = tty->driver_data;
1da177e4 1234 if (ch == NULL)
eaa95a8d 1235 return 0;
b4173f45 1236 return MoxaPortTxFree(ch);
1da177e4
LT		 1237}
1238
1239static void moxa_flush_buffer(struct tty_struct *tty)
1240{
b4173f45 1241 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1242
1243 if (ch == NULL)
1244 return;
b4173f45 1245 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1246 tty_wakeup(tty);
1247}
1248
1249static int moxa_chars_in_buffer(struct tty_struct *tty)
1250{
b4173f45 1251 struct moxa_port *ch = tty->driver_data;
1da177e4 1252 int chars;
1da177e4 1253
978e595f 1254 lock_kernel();
b4173f45 1255 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1256 if (chars) {
1257 /*
1258 * Make it possible to wakeup anything waiting for output
1259 * in tty_ioctl.c, etc.
1260 */
a808ac0c 1261 if (!test_bit(EMPTYWAIT, &ch->statusflags))
6f56b658 1262 moxa_setup_empty_event(tty);
1da177e4 1263 }
978e595f 1264 unlock_kernel();
eaa95a8d 1265 return chars;
1da177e4
LT		 1266}
1267
1da177e4
LT		 1268static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1269{
a8f5cda0 1270 struct moxa_port *ch;
1da177e4
LT		 1271 int flag = 0, dtr, rts;
1272
a8f5cda0
JS		 1273 mutex_lock(&moxa_openlock);
1274 ch = tty->driver_data;
1275 if (!ch) {
1276 mutex_unlock(&moxa_openlock);
74d7d97b 1277 return -EINVAL;
a8f5cda0 1278 }
1da177e4 1279
b4173f45 1280 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1281 if (dtr)
1282 flag |= TIOCM_DTR;
1283 if (rts)
1284 flag |= TIOCM_RTS;
b4173f45 1285 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1286 if (dtr & 1)
1287 flag |= TIOCM_CTS;
1288 if (dtr & 2)
1289 flag |= TIOCM_DSR;
1290 if (dtr & 4)
1291 flag |= TIOCM_CD;
a8f5cda0 1292 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1293 return flag;
1294}
1295
1296static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1297 unsigned int set, unsigned int clear)
1298{
a8f5cda0 1299 struct moxa_port *ch;
1da177e4
LT		 1300 int port;
1301 int dtr, rts;
1302
11324edd 1303 port = tty->index;
a8f5cda0
JS		 1304 mutex_lock(&moxa_openlock);
1305 ch = tty->driver_data;
1306 if (!ch) {
1307 mutex_unlock(&moxa_openlock);
74d7d97b 1308 return -EINVAL;
a8f5cda0 1309 }
1da177e4 1310
b4173f45 1311 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1312 if (set & TIOCM_RTS)
1313 rts = 1;
1314 if (set & TIOCM_DTR)
1315 dtr = 1;
1316 if (clear & TIOCM_RTS)
1317 rts = 0;
1318 if (clear & TIOCM_DTR)
1319 dtr = 0;
b4173f45 1320 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1321 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1322 return 0;
1323}
1324
1da177e4 1325static void moxa_set_termios(struct tty_struct *tty,
eaa95a8d 1326 struct ktermios *old_termios)
1da177e4 1327{
eaa95a8d 1328 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1329
1330 if (ch == NULL)
1331 return;
db1acaa6 1332 moxa_set_tty_param(tty, old_termios);
eaa95a8d 1333 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
9de6a51f 1334 wake_up_interruptible(&ch->port.open_wait);
1da177e4
LT		 1335}
1336
1337static void moxa_stop(struct tty_struct *tty)
1338{
eaa95a8d 1339 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1340
1341 if (ch == NULL)
1342 return;
b4173f45 1343 MoxaPortTxDisable(ch);
a808ac0c 1344 set_bit(TXSTOPPED, &ch->statusflags);
1da177e4
LT		 1345}
1346
1347
1348static void moxa_start(struct tty_struct *tty)
1349{
eaa95a8d 1350 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1351
1352 if (ch == NULL)
1353 return;
1354
1355 if (!(ch->statusflags & TXSTOPPED))
1356 return;
1357
b4173f45 1358 MoxaPortTxEnable(ch);
a808ac0c 1359 clear_bit(TXSTOPPED, &ch->statusflags);
1da177e4
LT		 1360}
1361
1362static void moxa_hangup(struct tty_struct *tty)
1363{
a808ac0c 1364 struct moxa_port *ch = tty->driver_data;
f176178b 1365 tty_port_hangup(&ch->port);
1da177e4
LT		 1366}
1367
7bcf97d1 1368static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1369{
d450b5a0 1370 struct tty_struct *tty;
7bcf97d1 1371 dcd = !!dcd;
1da177e4 1372
d450b5a0
AC		 1373 if (dcd != p->DCDState) {
1374 tty = tty_port_tty_get(&p->port);
1375 if (tty && C_CLOCAL(tty) && !dcd)
1376 tty_hangup(tty);
1377 tty_kref_put(tty);
7bcf97d1
JS		 1378 }
1379 p->DCDState = dcd;
1380}
1da177e4 1381
7bcf97d1
JS		 1382static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1383 u16 __iomem *ip)
1384{
d450b5a0 1385 struct tty_struct *tty = tty_port_tty_get(&p->port);
7bcf97d1 1386 void __iomem *ofsAddr;
9de6a51f 1387 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
7bcf97d1
JS		 1388 u16 intr;
1389
1390 if (tty) {
a808ac0c 1391 if (test_bit(EMPTYWAIT, &p->statusflags) &&
7bcf97d1 1392 MoxaPortTxQueue(p) == 0) {
a808ac0c 1393 clear_bit(EMPTYWAIT, &p->statusflags);
7bcf97d1
JS		 1394 tty_wakeup(tty);
1395 }
a808ac0c 1396 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
7bcf97d1 1397 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
a808ac0c 1398 clear_bit(LOWWAIT, &p->statusflags);
7bcf97d1
JS		 1399 tty_wakeup(tty);
1400 }
1401
f9b412a8 1402 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
7bcf97d1
JS		 1403 MoxaPortRxQueue(p) > 0) { /* RX */
1404 MoxaPortReadData(p);
1405 tty_schedule_flip(tty);
1406 }
1407 } else {
a808ac0c 1408 clear_bit(EMPTYWAIT, &p->statusflags);
7bcf97d1 1409 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1410 }
0bcc4caa 1411
7bcf97d1 1412 if (!handle) /* nothing else to do */
0e0fd7d7 1413 goto put;
7bcf97d1
JS		 1414
1415 intr = readw(ip); /* port irq status */
1416 if (intr == 0)
0e0fd7d7 1417 goto put;
7bcf97d1
JS		 1418
1419 writew(0, ip); /* ACK port */
1420 ofsAddr = p->tableAddr;
1421 if (intr & IntrTx) /* disable tx intr */
1422 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1423 ofsAddr + HostStat);
1424
1425 if (!inited)
0e0fd7d7 1426 goto put;
7bcf97d1
JS		 1427
1428 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1429 tty_insert_flip_char(tty, 0, TTY_BREAK);
1430 tty_schedule_flip(tty);
1431 }
1432
1433 if (intr & IntrLine)
1434 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
0e0fd7d7
JS		 1435put:
1436 tty_kref_put(tty);
7bcf97d1
JS		 1437
1438 return 0;
1439}
1440
1441static void moxa_poll(unsigned long ignored)
1442{
1443 struct moxa_board_conf *brd;
1444 u16 __iomem *ip;
2a541341 1445 unsigned int card, port, served = 0;
7bcf97d1
JS		 1446
1447 spin_lock(&moxa_lock);
1da177e4 1448 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1449 brd = &moxa_boards[card];
1450 if (!brd->ready)
1da177e4 1451 continue;
7bcf97d1 1452
2a541341
JS		 1453 served++;
1454
7bcf97d1
JS		 1455 ip = NULL;
1456 if (readb(brd->intPend) == 0xff)
1457 ip = brd->intTable + readb(brd->intNdx);
1458
1459 for (port = 0; port < brd->numPorts; port++)
1460 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1461
1462 if (ip)
1463 writeb(0, brd->intPend); /* ACK */
1464
1465 if (moxaLowWaterChk) {
1466 struct moxa_port *p = brd->ports;
1467 for (port = 0; port < brd->numPorts; port++, p++)
1468 if (p->lowChkFlag) {
1469 p->lowChkFlag = 0;
1470 moxa_low_water_check(p->tableAddr);
1da177e4 1471 }
1da177e4
LT		 1472 }
1473 }
7bcf97d1 1474 moxaLowWaterChk = 0;
1da177e4 1475
2a541341
JS		 1476 if (served)
1477 mod_timer(&moxaTimer, jiffies + HZ / 50);
1478 spin_unlock(&moxa_lock);
1da177e4
LT		 1479}
1480
1481/******************************************************************************/
1482
db1acaa6 1483static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1484{
eaa95a8d
JS		 1485 register struct ktermios *ts = tty->termios;
1486 struct moxa_port *ch = tty->driver_data;
db1acaa6 1487 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1488
1da177e4
LT		 1489 rts = cts = txflow = rxflow = xany = 0;
1490 if (ts->c_cflag & CRTSCTS)
1491 rts = cts = 1;
1492 if (ts->c_iflag & IXON)
1493 txflow = 1;
1494 if (ts->c_iflag & IXOFF)
1495 rxflow = 1;
1496 if (ts->c_iflag & IXANY)
1497 xany = 1;
db1acaa6
AC		 1498
1499 /* Clear the features we don't support */
1500 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1501 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1502 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1503 if (baud == -1)
1504 baud = tty_termios_baud_rate(old_termios);
1505 /* Not put the baud rate into the termios data */
1506 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1507}
1508
6f56b658 1509static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1510{
8f8ecbad 1511 struct moxa_port *ch = tty->driver_data;
a808ac0c 1512 set_bit(EMPTYWAIT, &ch->statusflags);
1da177e4
LT		 1513}
1514
1da177e4
LT		 1515/*****************************************************************************
1516 * Driver level functions: *
1da177e4 1517 *****************************************************************************/
1da177e4 1518
b4173f45 1519static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1520{
1521 void __iomem *ofsAddr;
eaa95a8d 1522 if (mode < 0 || mode > 2)
1da177e4 1523 return;
b4173f45 1524 ofsAddr = port->tableAddr;
1da177e4
LT		 1525 moxafunc(ofsAddr, FC_FlushQueue, mode);
1526 if (mode != 1) {
b4173f45 1527 port->lowChkFlag = 0;
6f56b658 1528 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1529 }
1530}
1531
1da177e4
LT		 1532/*
1533 * Moxa Port Number Description:
1534 *
1535 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1536 * the port number using in MOXA driver functions will be 0 to 31 for
1537 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1538 * to 127 for fourth. For example, if you setup three MOXA boards,
1539 * first board is C218, second board is C320-16 and third board is
1540 * C320-32. The port number of first board (C218 - 8 ports) is from
1541 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1542 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1543 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1544 * 127 will be invalid.
1545 *
1546 *
1547 * Moxa Functions Description:
1548 *
1549 * Function 1: Driver initialization routine, this routine must be
1550 * called when initialized driver.
1551 * Syntax:
1552 * void MoxaDriverInit();
1553 *
1554 *
1555 * Function 2: Moxa driver private IOCTL command processing.
1556 * Syntax:
1557 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1558 *
1559 * unsigned int cmd : IOCTL command
1560 * unsigned long arg : IOCTL argument
1561 * int port : port number (0 - 127)
1562 *
1563 * return: 0 (OK)
1564 * -EINVAL
1565 * -ENOIOCTLCMD
1566 *
1567 *
1da177e4
LT		 1568 * Function 6: Enable this port to start Tx/Rx data.
1569 * Syntax:
1570 * void MoxaPortEnable(int port);
1571 * int port : port number (0 - 127)
1572 *
1573 *
1574 * Function 7: Disable this port
1575 * Syntax:
1576 * void MoxaPortDisable(int port);
1577 * int port : port number (0 - 127)
1578 *
1579 *
1da177e4
LT		 1580 * Function 10: Setting baud rate of this port.
1581 * Syntax:
08d01c79 1582 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1da177e4
LT		 1583 * int port : port number (0 - 127)
1584 * long baud : baud rate (50 - 115200)
1585 *
1586 * return: 0 : this port is invalid or baud < 50
1587 * 50 - 115200 : the real baud rate set to the port, if
1588 * the argument baud is large than maximun
1589 * available baud rate, the real setting
1590 * baud rate will be the maximun baud rate.
1591 *
1592 *
1da177e4
LT		 1593 * Function 12: Configure the port.
1594 * Syntax:
606d099c 1595 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1596 * int port : port number (0 - 127)
606d099c 1597 * struct ktermios * termio : termio structure pointer
c7bce309 1598 * speed_t baud : baud rate
1da177e4
LT		 1599 *
1600 * return: -1 : this port is invalid or termio == NULL
1601 * 0 : setting O.K.
1602 *
1603 *
1604 * Function 13: Get the DTR/RTS state of this port.
1605 * Syntax:
1606 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1607 * int port : port number (0 - 127)
1608 * int * dtrState : pointer to INT to receive the current DTR
1609 * state. (if NULL, this function will not
1610 * write to this address)
1611 * int * rtsState : pointer to INT to receive the current RTS
1612 * state. (if NULL, this function will not
1613 * write to this address)
1614 *
1615 * return: -1 : this port is invalid
1616 * 0 : O.K.
1617 *
1618 *
1619 * Function 14: Setting the DTR/RTS output state of this port.
1620 * Syntax:
1621 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1622 * int port : port number (0 - 127)
1623 * int dtrState : DTR output state (0: off, 1: on)
1624 * int rtsState : RTS output state (0: off, 1: on)
1625 *
1626 *
1627 * Function 15: Setting the flow control of this port.
1628 * Syntax:
1629 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1630 * int txFlow,int xany);
1631 * int port : port number (0 - 127)
1632 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1633 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1634 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1635 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1636 * int xany : S/W XANY flow control (0: no, 1: yes)
1637 *
1638 *
1639 * Function 16: Get ths line status of this port
1640 * Syntax:
1641 * int MoxaPortLineStatus(int port);
1642 * int port : port number (0 - 127)
1643 *
1644 * return: Bit 0 - CTS state (0: off, 1: on)
1645 * Bit 1 - DSR state (0: off, 1: on)
1646 * Bit 2 - DCD state (0: off, 1: on)
1647 *
1648 *
1da177e4
LT		 1649 * Function 19: Flush the Rx/Tx buffer data of this port.
1650 * Syntax:
1651 * void MoxaPortFlushData(int port, int mode);
1652 * int port : port number (0 - 127)
1653 * int mode
1654 * 0 : flush the Rx buffer
1655 * 1 : flush the Tx buffer
1656 * 2 : flush the Rx and Tx buffer
1657 *
1658 *
1659 * Function 20: Write data.
1660 * Syntax:
1661 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1662 * int port : port number (0 - 127)
1663 * unsigned char * buffer : pointer to write data buffer.
1664 * int length : write data length
1665 *
1666 * return: 0 - length : real write data length
1667 *
1668 *
1669 * Function 21: Read data.
1670 * Syntax:
33f0f88f 1671 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1672 * int port : port number (0 - 127)
33f0f88f 1673 * struct tty_struct *tty : tty for data
1da177e4
LT		 1674 *
1675 * return: 0 - length : real read data length
1676 *
1677 *
1da177e4
LT		 1678 * Function 24: Get the Tx buffer current queued data bytes
1679 * Syntax:
1680 * int MoxaPortTxQueue(int port);
1681 * int port : port number (0 - 127)
1682 *
1683 * return: .. : Tx buffer current queued data bytes
1684 *
1685 *
1686 * Function 25: Get the Tx buffer current free space
1687 * Syntax:
1688 * int MoxaPortTxFree(int port);
1689 * int port : port number (0 - 127)
1690 *
1691 * return: .. : Tx buffer current free space
1692 *
1693 *
1694 * Function 26: Get the Rx buffer current queued data bytes
1695 * Syntax:
1696 * int MoxaPortRxQueue(int port);
1697 * int port : port number (0 - 127)
1698 *
1699 * return: .. : Rx buffer current queued data bytes
1700 *
1701 *
1da177e4
LT		 1702 * Function 28: Disable port data transmission.
1703 * Syntax:
1704 * void MoxaPortTxDisable(int port);
1705 * int port : port number (0 - 127)
1706 *
1707 *
1708 * Function 29: Enable port data transmission.
1709 * Syntax:
1710 * void MoxaPortTxEnable(int port);
1711 * int port : port number (0 - 127)
1712 *
1713 *
1da177e4
LT		 1714 * Function 31: Get the received BREAK signal count and reset it.
1715 * Syntax:
1716 * int MoxaPortResetBrkCnt(int port);
1717 * int port : port number (0 - 127)
1718 *
1719 * return: 0 - .. : BREAK signal count
1720 *
1721 *
1da177e4 1722 */
1da177e4 1723
b4173f45 1724static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1725{
1726 void __iomem *ofsAddr;
eaa95a8d 1727 u16 lowwater = 512;
1da177e4 1728
b4173f45 1729 ofsAddr = port->tableAddr;
1da177e4 1730 writew(lowwater, ofsAddr + Low_water);
08d01c79 1731 if (MOXA_IS_320(port->board))
1da177e4 1732 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
eaa95a8d
JS		 1733 else
1734 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1735 ofsAddr + HostStat);
1da177e4
LT		 1736
1737 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1738 moxafunc(ofsAddr, FC_FlushQueue, 2);
1739
1740 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1741 MoxaPortLineStatus(port);
1742}
1743
b4173f45 1744static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1745{
b4173f45 1746 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1747
1748 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1749 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1750 writew(0, ofsAddr + HostStat);
1751 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1752}
1753
08d01c79 1754static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1da177e4 1755{
08d01c79
JS		 1756 void __iomem *ofsAddr = port->tableAddr;
1757 unsigned int clock, val;
1758 speed_t max;
1da177e4 1759
08d01c79
JS		 1760 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1761 if (baud < 50)
eaa95a8d 1762 return 0;
1da177e4
LT		 1763 if (baud > max)
1764 baud = max;
08d01c79 1765 clock = 921600;
1da177e4
LT		 1766 val = clock / baud;
1767 moxafunc(ofsAddr, FC_SetBaud, val);
1768 baud = clock / val;
eaa95a8d 1769 return baud;
1da177e4
LT		 1770}
1771
b4173f45
JS		 1772static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1773 speed_t baud)
1da177e4
LT		 1774{
1775 void __iomem *ofsAddr;
1776 tcflag_t cflag;
1da177e4
LT		 1777 tcflag_t mode = 0;
1778
b4173f45 1779 ofsAddr = port->tableAddr;
1da177e4
LT		 1780 cflag = termio->c_cflag; /* termio->c_cflag */
1781
1782 mode = termio->c_cflag & CSIZE;
1783 if (mode == CS5)
1784 mode = MX_CS5;
1785 else if (mode == CS6)
1786 mode = MX_CS6;
1787 else if (mode == CS7)
1788 mode = MX_CS7;
1789 else if (mode == CS8)
1790 mode = MX_CS8;
1791
1792 if (termio->c_cflag & CSTOPB) {
1793 if (mode == MX_CS5)
1794 mode |= MX_STOP15;
1795 else
1796 mode |= MX_STOP2;
1797 } else
1798 mode |= MX_STOP1;
1799
1800 if (termio->c_cflag & PARENB) {
1801 if (termio->c_cflag & PARODD)
1802 mode |= MX_PARODD;
1803 else
1804 mode |= MX_PAREVEN;
1805 } else
1806 mode |= MX_PARNONE;
1807
eaa95a8d 1808 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1da177e4 1809
08d01c79
JS		 1810 if (MOXA_IS_320(port->board) && baud >= 921600)
1811 return -1;
1812
db1acaa6 1813 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1814
1815 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
f5c5a36d 1816 spin_lock_irq(&moxafunc_lock);
1da177e4
LT		 1817 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1818 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1819 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1820 moxa_wait_finish(ofsAddr);
a808ac0c 1821 spin_unlock_irq(&moxafunc_lock);
1da177e4
LT		 1822
1823 }
eaa95a8d 1824 return baud;
1da177e4
LT		 1825}
1826
b4173f45
JS		 1827static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1828 int *rtsState)
1da177e4 1829{
b4173f45
JS		 1830 if (dtrState)
1831 *dtrState = !!(port->lineCtrl & DTR_ON);
1832 if (rtsState)
1833 *rtsState = !!(port->lineCtrl & RTS_ON);
1834
eaa95a8d 1835 return 0;
1da177e4
LT		 1836}
1837
b4173f45 1838static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1839{
eaa95a8d 1840 u8 mode = 0;
1da177e4 1841
1da177e4
LT		 1842 if (dtr)
1843 mode |= DTR_ON;
1844 if (rts)
1845 mode |= RTS_ON;
b4173f45
JS		 1846 port->lineCtrl = mode;
1847 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1848}
1849
b4173f45
JS		 1850static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1851 int txflow, int rxflow, int txany)
1da177e4 1852{
b4173f45 1853 int mode = 0;
1da177e4 1854
1da177e4
LT		 1855 if (rts)
1856 mode |= RTS_FlowCtl;
1857 if (cts)
1858 mode |= CTS_FlowCtl;
1859 if (txflow)
1860 mode |= Tx_FlowCtl;
1861 if (rxflow)
1862 mode |= Rx_FlowCtl;
1863 if (txany)
1864 mode |= IXM_IXANY;
b4173f45 1865 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 1866}
1867
b4173f45 1868static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 1869{
1870 void __iomem *ofsAddr;
1871 int val;
1872
b4173f45 1873 ofsAddr = port->tableAddr;
f5c5a36d
AC		 1874 if (MOXA_IS_320(port->board))
1875 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1876 else
1da177e4 1877 val = readw(ofsAddr + FlagStat) >> 4;
1da177e4 1878 val &= 0x0B;
7bcf97d1 1879 if (val & 8)
1da177e4 1880 val |= 4;
a8f5cda0 1881 spin_lock_bh(&moxa_lock);
7bcf97d1 1882 moxa_new_dcdstate(port, val & 8);
a8f5cda0 1883 spin_unlock_bh(&moxa_lock);
1da177e4 1884 val &= 7;
7bcf97d1 1885 return val;
1da177e4
LT		 1886}
1887
d450b5a0 1888static int MoxaPortWriteData(struct tty_struct *tty,
2108eba5 1889 const unsigned char *buffer, int len)
1da177e4 1890{
d450b5a0 1891 struct moxa_port *port = tty->driver_data;
1da177e4 1892 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1893 unsigned int c, total;
1894 u16 head, tail, tx_mask, spage, epage;
1895 u16 pageno, pageofs, bufhead;
1da177e4 1896
b4173f45
JS		 1897 ofsAddr = port->tableAddr;
1898 baseAddr = port->board->basemem;
1da177e4
LT		 1899 tx_mask = readw(ofsAddr + TX_mask);
1900 spage = readw(ofsAddr + Page_txb);
1901 epage = readw(ofsAddr + EndPage_txb);
1902 tail = readw(ofsAddr + TXwptr);
1903 head = readw(ofsAddr + TXrptr);
2108eba5 1904 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 1905 if (c > len)
1906 c = len;
9de6a51f 1907 moxaLog.txcnt[port->port.tty->index] += c;
1da177e4
LT		 1908 total = c;
1909 if (spage == epage) {
1910 bufhead = readw(ofsAddr + Ofs_txb);
1911 writew(spage, baseAddr + Control_reg);
1912 while (c > 0) {
1913 if (head > tail)
1914 len = head - tail - 1;
1915 else
1916 len = tx_mask + 1 - tail;
1917 len = (c > len) ? len : c;
1918 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 1919 memcpy_toio(ofs, buffer, len);
1920 buffer += len;
1da177e4
LT		 1921 tail = (tail + len) & tx_mask;
1922 c -= len;
1923 }
1da177e4 1924 } else {
1da177e4
LT		 1925 pageno = spage + (tail >> 13);
1926 pageofs = tail & Page_mask;
2108eba5
JS		 1927 while (c > 0) {
1928 len = Page_size - pageofs;
1929 if (len > c)
1930 len = c;
1da177e4
LT		 1931 writeb(pageno, baseAddr + Control_reg);
1932 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1933 memcpy_toio(ofs, buffer, len);
1934 buffer += len;
1da177e4
LT		 1935 if (++pageno == epage)
1936 pageno = spage;
1937 pageofs = 0;
2108eba5
JS		 1938 c -= len;
1939 }
1940 tail = (tail + total) & tx_mask;
1da177e4 1941 }
2108eba5 1942 writew(tail, ofsAddr + TXwptr);
1da177e4 1943 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 1944 return total;
1da177e4
LT		 1945}
1946
7bcf97d1 1947static int MoxaPortReadData(struct moxa_port *port)
1da177e4 1948{
9de6a51f 1949 struct tty_struct *tty = port->port.tty;
2108eba5 1950 unsigned char *dst;
1da177e4 1951 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1952 unsigned int count, len, total;
1953 u16 tail, rx_mask, spage, epage;
1954 u16 pageno, pageofs, bufhead, head;
1da177e4 1955
b4173f45
JS		 1956 ofsAddr = port->tableAddr;
1957 baseAddr = port->board->basemem;
1da177e4
LT		 1958 head = readw(ofsAddr + RXrptr);
1959 tail = readw(ofsAddr + RXwptr);
1960 rx_mask = readw(ofsAddr + RX_mask);
1961 spage = readw(ofsAddr + Page_rxb);
1962 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 1963 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 1964 if (count == 0)
33f0f88f 1965 return 0;
1da177e4 1966
33f0f88f 1967 total = count;
7bcf97d1 1968 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 1969 if (spage == epage) {
1970 bufhead = readw(ofsAddr + Ofs_rxb);
1971 writew(spage, baseAddr + Control_reg);
1972 while (count > 0) {
1da177e4 1973 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 1974 len = (tail >= head) ? (tail - head) :
1975 (rx_mask + 1 - head);
1976 len = tty_prepare_flip_string(tty, &dst,
1977 min(len, count));
1978 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 1979 head = (head + len) & rx_mask;
1980 count -= len;
1981 }
1da177e4 1982 } else {
1da177e4
LT		 1983 pageno = spage + (head >> 13);
1984 pageofs = head & Page_mask;
2108eba5 1985 while (count > 0) {
1da177e4
LT		 1986 writew(pageno, baseAddr + Control_reg);
1987 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1988 len = tty_prepare_flip_string(tty, &dst,
1989 min(Page_size - pageofs, count));
1990 memcpy_fromio(dst, ofs, len);
1991
1992 count -= len;
1993 pageofs = (pageofs + len) & Page_mask;
1994 if (pageofs == 0 && ++pageno == epage)
1da177e4 1995 pageno = spage;
2108eba5
JS		 1996 }
1997 head = (head + total) & rx_mask;
1da177e4 1998 }
2108eba5
JS		 1999 writew(head, ofsAddr + RXrptr);
2000 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2001 moxaLowWaterChk = 1;
b4173f45 2002 port->lowChkFlag = 1;
1da177e4 2003 }
2108eba5 2004 return total;
1da177e4
LT		 2005}
2006
2007
b4173f45 2008static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2009{
b4173f45 2010 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2011 u16 rptr, wptr, mask;
1da177e4 2012
1da177e4
LT		 2013 rptr = readw(ofsAddr + TXrptr);
2014 wptr = readw(ofsAddr + TXwptr);
2015 mask = readw(ofsAddr + TX_mask);
2108eba5 2016 return (wptr - rptr) & mask;
1da177e4
LT		 2017}
2018
b4173f45 2019static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2020{
b4173f45 2021 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2022 u16 rptr, wptr, mask;
1da177e4 2023
1da177e4
LT		 2024 rptr = readw(ofsAddr + TXrptr);
2025 wptr = readw(ofsAddr + TXwptr);
2026 mask = readw(ofsAddr + TX_mask);
2108eba5 2027 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2028}
2029
b4173f45 2030static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2031{
b4173f45 2032 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2033 u16 rptr, wptr, mask;
1da177e4 2034
1da177e4
LT		 2035 rptr = readw(ofsAddr + RXrptr);
2036 wptr = readw(ofsAddr + RXwptr);
2037 mask = readw(ofsAddr + RX_mask);
2108eba5 2038 return (wptr - rptr) & mask;
1da177e4
LT		 2039}
2040
b4173f45 2041static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2042{
b4173f45 2043 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2044}
2045
b4173f45 2046static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2047{
b4173f45 2048 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2049}
2050
8f8ecbad 2051static int moxa_get_serial_info(struct moxa_port *info,
eaa95a8d 2052 struct serial_struct __user *retinfo)
1da177e4 2053{
eaa95a8d
JS		 2054 struct serial_struct tmp = {
2055 .type = info->type,
9de6a51f
AC		 2056 .line = info->port.tty->index,
2057 .flags = info->port.flags,
eaa95a8d 2058 .baud_base = 921600,
44b7d1b3 2059 .close_delay = info->port.close_delay
eaa95a8d
JS		 2060 };
2061 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1da177e4
LT		 2062}
2063
2064
8f8ecbad 2065static int moxa_set_serial_info(struct moxa_port *info,
eaa95a8d 2066 struct serial_struct __user *new_info)
1da177e4
LT		 2067{
2068 struct serial_struct new_serial;
2069
eaa95a8d 2070 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1da177e4
LT		 2071 return -EFAULT;
2072
eaa95a8d
JS		 2073 if (new_serial.irq != 0 || new_serial.port != 0 ||
2074 new_serial.custom_divisor != 0 ||
2075 new_serial.baud_base != 921600)
2076 return -EPERM;
1da177e4
LT		 2077
2078 if (!capable(CAP_SYS_ADMIN)) {
2079 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
9de6a51f 2080 (info->port.flags & ~ASYNC_USR_MASK)))
eaa95a8d
JS		 2081 return -EPERM;
2082 } else
44b7d1b3 2083 info->port.close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2084
2085 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
9de6a51f 2086 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
1da177e4 2087
eaa95a8d 2088 MoxaSetFifo(info, new_serial.type == PORT_16550A);
1da177e4
LT		 2089
2090 info->type = new_serial.type;
eaa95a8d 2091 return 0;
1da177e4
LT		 2092}
2093
2094
2095
2096/*****************************************************************************
2097 * Static local functions: *
2098 *****************************************************************************/
1da177e4 2099
b4173f45 2100static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2101{
b4173f45 2102 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2103
2104 if (!enable) {
2105 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2106 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2107 } else {
2108 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2109 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2110 }
2111}
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