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[NETFILTER]: PPTP conntrack: remove more dead code
[linux-2.6.22.y-op.git] / drivers / char / moxa.c
bloba369dd6877d8afdf5f57f66def984f207b3ea581
1 /*****************************************************************************/
2 /*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
6 *
7 * This code is loosely based on the Linux serial driver, written by
8 * Linus Torvalds, Theodore T'so and others.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 /*
26 * MOXA Intellio Series Driver
27 * for : LINUX
28 * date : 1999/1/7
29 * version : 5.1
30 */
31
32 #include <linux/module.h>
33 #include <linux/types.h>
34 #include <linux/mm.h>
35 #include <linux/ioport.h>
36 #include <linux/errno.h>
37 #include <linux/signal.h>
38 #include <linux/sched.h>
39 #include <linux/timer.h>
40 #include <linux/interrupt.h>
41 #include <linux/tty.h>
42 #include <linux/tty_flip.h>
43 #include <linux/major.h>
44 #include <linux/string.h>
45 #include <linux/fcntl.h>
46 #include <linux/ptrace.h>
47 #include <linux/serial.h>
48 #include <linux/tty_driver.h>
49 #include <linux/delay.h>
50 #include <linux/pci.h>
51 #include <linux/init.h>
52 #include <linux/bitops.h>
53
54 #include <asm/system.h>
55 #include <asm/io.h>
56 #include <asm/uaccess.h>
57
58 #define MOXA_VERSION "5.1k"
59
60 #define MOXAMAJOR 172
61 #define MOXACUMAJOR 173
62
63 #define put_to_user(arg1, arg2) put_user(arg1, (unsigned long *)arg2)
64 #define get_from_user(arg1, arg2) get_user(arg1, (unsigned int *)arg2)
65
66 #define MAX_BOARDS 4 /* Don't change this value */
67 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
68 #define MAX_PORTS 128 /* Don't change this value */
69
70 /*
71 * Define the Moxa PCI vendor and device IDs.
72 */
73 #define MOXA_BUS_TYPE_ISA 0
74 #define MOXA_BUS_TYPE_PCI 1
75
76 #ifndef PCI_VENDOR_ID_MOXA
77 #define PCI_VENDOR_ID_MOXA 0x1393
78 #endif
79 #ifndef PCI_DEVICE_ID_CP204J
80 #define PCI_DEVICE_ID_CP204J 0x2040
81 #endif
82 #ifndef PCI_DEVICE_ID_C218
83 #define PCI_DEVICE_ID_C218 0x2180
84 #endif
85 #ifndef PCI_DEVICE_ID_C320
86 #define PCI_DEVICE_ID_C320 0x3200
87 #endif
88
89 enum {
90 MOXA_BOARD_C218_PCI = 1,
91 MOXA_BOARD_C218_ISA,
92 MOXA_BOARD_C320_PCI,
93 MOXA_BOARD_C320_ISA,
94 MOXA_BOARD_CP204J,
95 };
96
97 static char *moxa_brdname[] =
98 {
99 "C218 Turbo PCI series",
100 "C218 Turbo ISA series",
101 "C320 Turbo PCI series",
102 "C320 Turbo ISA series",
103 "CP-204J series",
104 };
105
106 #ifdef CONFIG_PCI
107 static struct pci_device_id moxa_pcibrds[] = {
108 { PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_C218, PCI_ANY_ID, PCI_ANY_ID,
109 0, 0, MOXA_BOARD_C218_PCI },
110 { PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_C320, PCI_ANY_ID, PCI_ANY_ID,
111 0, 0, MOXA_BOARD_C320_PCI },
112 { PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_CP204J, PCI_ANY_ID, PCI_ANY_ID,
113 0, 0, MOXA_BOARD_CP204J },
114 { 0 }
115 };
116 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
117 #endif /* CONFIG_PCI */
118
119 typedef struct _moxa_isa_board_conf {
120 int boardType;
121 int numPorts;
122 unsigned long baseAddr;
123 } moxa_isa_board_conf;
124
125 static moxa_isa_board_conf moxa_isa_boards[] =
126 {
127 /* {MOXA_BOARD_C218_ISA,8,0xDC000}, */
128 };
129
130 typedef struct _moxa_pci_devinfo {
131 ushort busNum;
132 ushort devNum;
133 } moxa_pci_devinfo;
134
135 typedef struct _moxa_board_conf {
136 int boardType;
137 int numPorts;
138 unsigned long baseAddr;
139 int busType;
140 moxa_pci_devinfo pciInfo;
141 } moxa_board_conf;
142
143 static moxa_board_conf moxa_boards[MAX_BOARDS];
144 static void __iomem *moxaBaseAddr[MAX_BOARDS];
145 static int loadstat[MAX_BOARDS];
146
147 struct moxa_str {
148 int type;
149 int port;
150 int close_delay;
151 unsigned short closing_wait;
152 int count;
153 int blocked_open;
154 long event; /* long req'd for set_bit --RR */
155 int asyncflags;
156 unsigned long statusflags;
157 struct tty_struct *tty;
158 int cflag;
159 wait_queue_head_t open_wait;
160 wait_queue_head_t close_wait;
161 struct work_struct tqueue;
162 };
163
164 struct mxser_mstatus {
165 tcflag_t cflag;
166 int cts;
167 int dsr;
168 int ri;
169 int dcd;
170 };
171
172 static struct mxser_mstatus GMStatus[MAX_PORTS];
173
174 /* statusflags */
175 #define TXSTOPPED 0x1
176 #define LOWWAIT 0x2
177 #define EMPTYWAIT 0x4
178 #define THROTTLE 0x8
179
180 /* event */
181 #define MOXA_EVENT_HANGUP 1
182
183 #define SERIAL_DO_RESTART
184
185
186 #define SERIAL_TYPE_NORMAL 1
187
188 #define WAKEUP_CHARS 256
189
190 #define PORTNO(x) ((x)->index)
191
192 static int verbose = 0;
193 static int ttymajor = MOXAMAJOR;
194 /* Variables for insmod */
195 #ifdef MODULE
196 static int baseaddr[] = {0, 0, 0, 0};
197 static int type[] = {0, 0, 0, 0};
198 static int numports[] = {0, 0, 0, 0};
199 #endif
200
201 MODULE_AUTHOR("William Chen");
202 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
203 MODULE_LICENSE("GPL");
204 #ifdef MODULE
205 module_param_array(type, int, NULL, 0);
206 module_param_array(baseaddr, int, NULL, 0);
207 module_param_array(numports, int, NULL, 0);
208 #endif
209 module_param(ttymajor, int, 0);
210 module_param(verbose, bool, 0644);
211
212 static struct tty_driver *moxaDriver;
213 static struct moxa_str moxaChannels[MAX_PORTS];
214 static unsigned char *moxaXmitBuff;
215 static int moxaTimer_on;
216 static struct timer_list moxaTimer;
217 static int moxaEmptyTimer_on[MAX_PORTS];
218 static struct timer_list moxaEmptyTimer[MAX_PORTS];
219 static struct semaphore moxaBuffSem;
220
221 /*
222 * static functions:
223 */
224 static void do_moxa_softint(void *);
225 static int moxa_open(struct tty_struct *, struct file *);
226 static void moxa_close(struct tty_struct *, struct file *);
227 static int moxa_write(struct tty_struct *, const unsigned char *, int);
228 static int moxa_write_room(struct tty_struct *);
229 static void moxa_flush_buffer(struct tty_struct *);
230 static int moxa_chars_in_buffer(struct tty_struct *);
231 static void moxa_flush_chars(struct tty_struct *);
232 static void moxa_put_char(struct tty_struct *, unsigned char);
233 static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long);
234 static void moxa_throttle(struct tty_struct *);
235 static void moxa_unthrottle(struct tty_struct *);
236 static void moxa_set_termios(struct tty_struct *, struct termios *);
237 static void moxa_stop(struct tty_struct *);
238 static void moxa_start(struct tty_struct *);
239 static void moxa_hangup(struct tty_struct *);
240 static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
241 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
242 unsigned int set, unsigned int clear);
243 static void moxa_poll(unsigned long);
244 static void set_tty_param(struct tty_struct *);
245 static int block_till_ready(struct tty_struct *, struct file *,
246 struct moxa_str *);
247 static void setup_empty_event(struct tty_struct *);
248 static void check_xmit_empty(unsigned long);
249 static void shut_down(struct moxa_str *);
250 static void receive_data(struct moxa_str *);
251 /*
252 * moxa board interface functions:
253 */
254 static void MoxaDriverInit(void);
255 static int MoxaDriverIoctl(unsigned int, unsigned long, int);
256 static int MoxaDriverPoll(void);
257 static int MoxaPortsOfCard(int);
258 static int MoxaPortIsValid(int);
259 static void MoxaPortEnable(int);
260 static void MoxaPortDisable(int);
261 static long MoxaPortGetMaxBaud(int);
262 static long MoxaPortSetBaud(int, long);
263 static int MoxaPortSetTermio(int, struct termios *);
264 static int MoxaPortGetLineOut(int, int *, int *);
265 static void MoxaPortLineCtrl(int, int, int);
266 static void MoxaPortFlowCtrl(int, int, int, int, int, int);
267 static int MoxaPortLineStatus(int);
268 static int MoxaPortDCDChange(int);
269 static int MoxaPortDCDON(int);
270 static void MoxaPortFlushData(int, int);
271 static int MoxaPortWriteData(int, unsigned char *, int);
272 static int MoxaPortReadData(int, struct tty_struct *tty);
273 static int MoxaPortTxQueue(int);
274 static int MoxaPortRxQueue(int);
275 static int MoxaPortTxFree(int);
276 static void MoxaPortTxDisable(int);
277 static void MoxaPortTxEnable(int);
278 static int MoxaPortResetBrkCnt(int);
279 static void MoxaPortSendBreak(int, int);
280 static int moxa_get_serial_info(struct moxa_str *, struct serial_struct __user *);
281 static int moxa_set_serial_info(struct moxa_str *, struct serial_struct __user *);
282 static void MoxaSetFifo(int port, int enable);
283
284 static struct tty_operations moxa_ops = {
285 .open = moxa_open,
286 .close = moxa_close,
287 .write = moxa_write,
288 .write_room = moxa_write_room,
289 .flush_buffer = moxa_flush_buffer,
290 .chars_in_buffer = moxa_chars_in_buffer,
291 .flush_chars = moxa_flush_chars,
292 .put_char = moxa_put_char,
293 .ioctl = moxa_ioctl,
294 .throttle = moxa_throttle,
295 .unthrottle = moxa_unthrottle,
296 .set_termios = moxa_set_termios,
297 .stop = moxa_stop,
298 .start = moxa_start,
299 .hangup = moxa_hangup,
300 .tiocmget = moxa_tiocmget,
301 .tiocmset = moxa_tiocmset,
302 };
303
304 static DEFINE_SPINLOCK(moxa_lock);
305
306 #ifdef CONFIG_PCI
307 static int moxa_get_PCI_conf(struct pci_dev *p, int board_type, moxa_board_conf * board)
308 {
309 board->baseAddr = pci_resource_start (p, 2);
310 board->boardType = board_type;
311 switch (board_type) {
312 case MOXA_BOARD_C218_ISA:
313 case MOXA_BOARD_C218_PCI:
314 board->numPorts = 8;
315 break;
316
317 case MOXA_BOARD_CP204J:
318 board->numPorts = 4;
319 break;
320 default:
321 board->numPorts = 0;
322 break;
323 }
324 board->busType = MOXA_BUS_TYPE_PCI;
325 board->pciInfo.busNum = p->bus->number;
326 board->pciInfo.devNum = p->devfn >> 3;
327
328 return (0);
329 }
330 #endif /* CONFIG_PCI */
331
332 static int __init moxa_init(void)
333 {
334 int i, numBoards;
335 struct moxa_str *ch;
336
337 printk(KERN_INFO "MOXA Intellio family driver version %s\n", MOXA_VERSION);
338 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
339 if (!moxaDriver)
340 return -ENOMEM;
341
342 init_MUTEX(&moxaBuffSem);
343 moxaDriver->owner = THIS_MODULE;
344 moxaDriver->name = "ttyMX";
345 moxaDriver->major = ttymajor;
346 moxaDriver->minor_start = 0;
347 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
348 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
349 moxaDriver->init_termios = tty_std_termios;
350 moxaDriver->init_termios.c_iflag = 0;
351 moxaDriver->init_termios.c_oflag = 0;
352 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
353 moxaDriver->init_termios.c_lflag = 0;
354 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
355 tty_set_operations(moxaDriver, &moxa_ops);
356
357 moxaXmitBuff = NULL;
358
359 for (i = 0, ch = moxaChannels; i < MAX_PORTS; i++, ch++) {
360 ch->type = PORT_16550A;
361 ch->port = i;
362 INIT_WORK(&ch->tqueue, do_moxa_softint, ch);
363 ch->tty = NULL;
364 ch->close_delay = 5 * HZ / 10;
365 ch->closing_wait = 30 * HZ;
366 ch->count = 0;
367 ch->blocked_open = 0;
368 ch->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
369 init_waitqueue_head(&ch->open_wait);
370 init_waitqueue_head(&ch->close_wait);
371 }
372
373 for (i = 0; i < MAX_BOARDS; i++) {
374 moxa_boards[i].boardType = 0;
375 moxa_boards[i].numPorts = 0;
376 moxa_boards[i].baseAddr = 0;
377 moxa_boards[i].busType = 0;
378 moxa_boards[i].pciInfo.busNum = 0;
379 moxa_boards[i].pciInfo.devNum = 0;
380 }
381 MoxaDriverInit();
382 printk("Tty devices major number = %d\n", ttymajor);
383
384 if (tty_register_driver(moxaDriver)) {
385 printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
386 put_tty_driver(moxaDriver);
387 return -1;
388 }
389 for (i = 0; i < MAX_PORTS; i++) {
390 init_timer(&moxaEmptyTimer[i]);
391 moxaEmptyTimer[i].function = check_xmit_empty;
392 moxaEmptyTimer[i].data = (unsigned long) & moxaChannels[i];
393 moxaEmptyTimer_on[i] = 0;
394 }
395
396 init_timer(&moxaTimer);
397 moxaTimer.function = moxa_poll;
398 moxaTimer.expires = jiffies + (HZ / 50);
399 moxaTimer_on = 1;
400 add_timer(&moxaTimer);
401
402 /* Find the boards defined in source code */
403 numBoards = 0;
404 for (i = 0; i < MAX_BOARDS; i++) {
405 if ((moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA) ||
406 (moxa_isa_boards[i].boardType == MOXA_BOARD_C320_ISA)) {
407 moxa_boards[numBoards].boardType = moxa_isa_boards[i].boardType;
408 if (moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA)
409 moxa_boards[numBoards].numPorts = 8;
410 else
411 moxa_boards[numBoards].numPorts = moxa_isa_boards[i].numPorts;
412 moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
413 moxa_boards[numBoards].baseAddr = moxa_isa_boards[i].baseAddr;
414 if (verbose)
415 printk("Board %2d: %s board(baseAddr=%lx)\n",
416 numBoards + 1,
417 moxa_brdname[moxa_boards[numBoards].boardType - 1],
418 moxa_boards[numBoards].baseAddr);
419 numBoards++;
420 }
421 }
422 /* Find the boards defined form module args. */
423 #ifdef MODULE
424 for (i = 0; i < MAX_BOARDS; i++) {
425 if ((type[i] == MOXA_BOARD_C218_ISA) ||
426 (type[i] == MOXA_BOARD_C320_ISA)) {
427 if (verbose)
428 printk("Board %2d: %s board(baseAddr=%lx)\n",
429 numBoards + 1,
430 moxa_brdname[type[i] - 1],
431 (unsigned long) baseaddr[i]);
432 if (numBoards >= MAX_BOARDS) {
433 if (verbose)
434 printk("More than %d MOXA Intellio family boards found. Board is ignored.", MAX_BOARDS);
435 continue;
436 }
437 moxa_boards[numBoards].boardType = type[i];
438 if (moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA)
439 moxa_boards[numBoards].numPorts = 8;
440 else
441 moxa_boards[numBoards].numPorts = numports[i];
442 moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
443 moxa_boards[numBoards].baseAddr = baseaddr[i];
444 numBoards++;
445 }
446 }
447 #endif
448 /* Find PCI boards here */
449 #ifdef CONFIG_PCI
450 {
451 struct pci_dev *p = NULL;
452 int n = ARRAY_SIZE(moxa_pcibrds) - 1;
453 i = 0;
454 while (i < n) {
455 while ((p = pci_get_device(moxa_pcibrds[i].vendor, moxa_pcibrds[i].device, p))!=NULL)
456 {
457 if (pci_enable_device(p))
458 continue;
459 if (numBoards >= MAX_BOARDS) {
460 if (verbose)
461 printk("More than %d MOXA Intellio family boards found. Board is ignored.", MAX_BOARDS);
462 } else {
463 moxa_get_PCI_conf(p, moxa_pcibrds[i].driver_data,
464 &moxa_boards[numBoards]);
465 numBoards++;
466 }
467 }
468 i++;
469 }
470 }
471 #endif
472 for (i = 0; i < numBoards; i++) {
473 moxaBaseAddr[i] = ioremap((unsigned long) moxa_boards[i].baseAddr, 0x4000);
474 }
475
476 return (0);
477 }
478
479 static void __exit moxa_exit(void)
480 {
481 int i;
482
483 if (verbose)
484 printk("Unloading module moxa ...\n");
485
486 if (moxaTimer_on)
487 del_timer(&moxaTimer);
488
489 for (i = 0; i < MAX_PORTS; i++)
490 if (moxaEmptyTimer_on[i])
491 del_timer(&moxaEmptyTimer[i]);
492
493 if (tty_unregister_driver(moxaDriver))
494 printk("Couldn't unregister MOXA Intellio family serial driver\n");
495 put_tty_driver(moxaDriver);
496 if (verbose)
497 printk("Done\n");
498 }
499
500 module_init(moxa_init);
501 module_exit(moxa_exit);
502
503 static void do_moxa_softint(void *private_)
504 {
505 struct moxa_str *ch = (struct moxa_str *) private_;
506 struct tty_struct *tty;
507
508 if (ch && (tty = ch->tty)) {
509 if (test_and_clear_bit(MOXA_EVENT_HANGUP, &ch->event)) {
510 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
511 wake_up_interruptible(&ch->open_wait);
512 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
513 }
514 }
515 }
516
517 static int moxa_open(struct tty_struct *tty, struct file *filp)
518 {
519 struct moxa_str *ch;
520 int port;
521 int retval;
522 unsigned long page;
523
524 port = PORTNO(tty);
525 if (port == MAX_PORTS) {
526 return (0);
527 }
528 if (!MoxaPortIsValid(port)) {
529 tty->driver_data = NULL;
530 return (-ENODEV);
531 }
532 down(&moxaBuffSem);
533 if (!moxaXmitBuff) {
534 page = get_zeroed_page(GFP_KERNEL);
535 if (!page) {
536 up(&moxaBuffSem);
537 return (-ENOMEM);
538 }
539 /* This test is guarded by the BuffSem so no longer needed
540 delete me in 2.5 */
541 if (moxaXmitBuff)
542 free_page(page);
543 else
544 moxaXmitBuff = (unsigned char *) page;
545 }
546 up(&moxaBuffSem);
547
548 ch = &moxaChannels[port];
549 ch->count++;
550 tty->driver_data = ch;
551 ch->tty = tty;
552 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
553 ch->statusflags = 0;
554 set_tty_param(tty);
555 MoxaPortLineCtrl(ch->port, 1, 1);
556 MoxaPortEnable(ch->port);
557 ch->asyncflags |= ASYNC_INITIALIZED;
558 }
559 retval = block_till_ready(tty, filp, ch);
560
561 moxa_unthrottle(tty);
562
563 if (ch->type == PORT_16550A) {
564 MoxaSetFifo(ch->port, 1);
565 } else {
566 MoxaSetFifo(ch->port, 0);
567 }
568
569 return (retval);
570 }
571
572 static void moxa_close(struct tty_struct *tty, struct file *filp)
573 {
574 struct moxa_str *ch;
575 int port;
576
577 port = PORTNO(tty);
578 if (port == MAX_PORTS) {
579 return;
580 }
581 if (!MoxaPortIsValid(port)) {
582 #ifdef SERIAL_DEBUG_CLOSE
583 printk("Invalid portno in moxa_close\n");
584 #endif
585 tty->driver_data = NULL;
586 return;
587 }
588 if (tty->driver_data == NULL) {
589 return;
590 }
591 if (tty_hung_up_p(filp)) {
592 return;
593 }
594 ch = (struct moxa_str *) tty->driver_data;
595
596 if ((tty->count == 1) && (ch->count != 1)) {
597 printk("moxa_close: bad serial port count; tty->count is 1, "
598 "ch->count is %d\n", ch->count);
599 ch->count = 1;
600 }
601 if (--ch->count < 0) {
602 printk("moxa_close: bad serial port count, device=%s\n",
603 tty->name);
604 ch->count = 0;
605 }
606 if (ch->count) {
607 return;
608 }
609 ch->asyncflags |= ASYNC_CLOSING;
610
611 ch->cflag = tty->termios->c_cflag;
612 if (ch->asyncflags & ASYNC_INITIALIZED) {
613 setup_empty_event(tty);
614 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
615 moxaEmptyTimer_on[ch->port] = 0;
616 del_timer(&moxaEmptyTimer[ch->port]);
617 }
618 shut_down(ch);
619 MoxaPortFlushData(port, 2);
620
621 if (tty->driver->flush_buffer)
622 tty->driver->flush_buffer(tty);
623 tty_ldisc_flush(tty);
624
625 tty->closing = 0;
626 ch->event = 0;
627 ch->tty = NULL;
628 if (ch->blocked_open) {
629 if (ch->close_delay) {
630 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
631 }
632 wake_up_interruptible(&ch->open_wait);
633 }
634 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
635 wake_up_interruptible(&ch->close_wait);
636 }
637
638 static int moxa_write(struct tty_struct *tty,
639 const unsigned char *buf, int count)
640 {
641 struct moxa_str *ch;
642 int len, port;
643 unsigned long flags;
644
645 ch = (struct moxa_str *) tty->driver_data;
646 if (ch == NULL)
647 return (0);
648 port = ch->port;
649
650 spin_lock_irqsave(&moxa_lock, flags);
651 len = MoxaPortWriteData(port, (unsigned char *) buf, count);
652 spin_unlock_irqrestore(&moxa_lock, flags);
653
654 /*********************************************
655 if ( !(ch->statusflags & LOWWAIT) &&
656 ((len != count) || (MoxaPortTxFree(port) <= 100)) )
657 ************************************************/
658 ch->statusflags |= LOWWAIT;
659 return (len);
660 }
661
662 static int moxa_write_room(struct tty_struct *tty)
663 {
664 struct moxa_str *ch;
665
666 if (tty->stopped)
667 return (0);
668 ch = (struct moxa_str *) tty->driver_data;
669 if (ch == NULL)
670 return (0);
671 return (MoxaPortTxFree(ch->port));
672 }
673
674 static void moxa_flush_buffer(struct tty_struct *tty)
675 {
676 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
677
678 if (ch == NULL)
679 return;
680 MoxaPortFlushData(ch->port, 1);
681 tty_wakeup(tty);
682 }
683
684 static int moxa_chars_in_buffer(struct tty_struct *tty)
685 {
686 int chars;
687 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
688
689 /*
690 * Sigh...I have to check if driver_data is NULL here, because
691 * if an open() fails, the TTY subsystem eventually calls
692 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
693 * routine. And since the open() failed, we return 0 here. TDJ
694 */
695 if (ch == NULL)
696 return (0);
697 chars = MoxaPortTxQueue(ch->port);
698 if (chars) {
699 /*
700 * Make it possible to wakeup anything waiting for output
701 * in tty_ioctl.c, etc.
702 */
703 if (!(ch->statusflags & EMPTYWAIT))
704 setup_empty_event(tty);
705 }
706 return (chars);
707 }
708
709 static void moxa_flush_chars(struct tty_struct *tty)
710 {
711 /*
712 * Don't think I need this, because this is called to empty the TX
713 * buffer for the 16450, 16550, etc.
714 */
715 }
716
717 static void moxa_put_char(struct tty_struct *tty, unsigned char c)
718 {
719 struct moxa_str *ch;
720 int port;
721 unsigned long flags;
722
723 ch = (struct moxa_str *) tty->driver_data;
724 if (ch == NULL)
725 return;
726 port = ch->port;
727 spin_lock_irqsave(&moxa_lock, flags);
728 moxaXmitBuff[0] = c;
729 MoxaPortWriteData(port, moxaXmitBuff, 1);
730 spin_unlock_irqrestore(&moxa_lock, flags);
731 /************************************************
732 if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
733 *************************************************/
734 ch->statusflags |= LOWWAIT;
735 }
736
737 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
738 {
739 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
740 int port;
741 int flag = 0, dtr, rts;
742
743 port = PORTNO(tty);
744 if ((port != MAX_PORTS) && (!ch))
745 return (-EINVAL);
746
747 MoxaPortGetLineOut(ch->port, &dtr, &rts);
748 if (dtr)
749 flag |= TIOCM_DTR;
750 if (rts)
751 flag |= TIOCM_RTS;
752 dtr = MoxaPortLineStatus(ch->port);
753 if (dtr & 1)
754 flag |= TIOCM_CTS;
755 if (dtr & 2)
756 flag |= TIOCM_DSR;
757 if (dtr & 4)
758 flag |= TIOCM_CD;
759 return flag;
760 }
761
762 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
763 unsigned int set, unsigned int clear)
764 {
765 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
766 int port;
767 int dtr, rts;
768
769 port = PORTNO(tty);
770 if ((port != MAX_PORTS) && (!ch))
771 return (-EINVAL);
772
773 MoxaPortGetLineOut(ch->port, &dtr, &rts);
774 if (set & TIOCM_RTS)
775 rts = 1;
776 if (set & TIOCM_DTR)
777 dtr = 1;
778 if (clear & TIOCM_RTS)
779 rts = 0;
780 if (clear & TIOCM_DTR)
781 dtr = 0;
782 MoxaPortLineCtrl(ch->port, dtr, rts);
783 return 0;
784 }
785
786 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
787 unsigned int cmd, unsigned long arg)
788 {
789 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
790 register int port;
791 void __user *argp = (void __user *)arg;
792 int retval;
793
794 port = PORTNO(tty);
795 if ((port != MAX_PORTS) && (!ch))
796 return (-EINVAL);
797
798 switch (cmd) {
799 case TCSBRK: /* SVID version: non-zero arg --> no break */
800 retval = tty_check_change(tty);
801 if (retval)
802 return (retval);
803 setup_empty_event(tty);
804 tty_wait_until_sent(tty, 0);
805 if (!arg)
806 MoxaPortSendBreak(ch->port, 0);
807 return (0);
808 case TCSBRKP: /* support for POSIX tcsendbreak() */
809 retval = tty_check_change(tty);
810 if (retval)
811 return (retval);
812 setup_empty_event(tty);
813 tty_wait_until_sent(tty, 0);
814 MoxaPortSendBreak(ch->port, arg);
815 return (0);
816 case TIOCGSOFTCAR:
817 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
818 case TIOCSSOFTCAR:
819 if(get_user(retval, (unsigned long __user *) argp))
820 return -EFAULT;
821 arg = retval;
822 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
823 (arg ? CLOCAL : 0));
824 if (C_CLOCAL(tty))
825 ch->asyncflags &= ~ASYNC_CHECK_CD;
826 else
827 ch->asyncflags |= ASYNC_CHECK_CD;
828 return (0);
829 case TIOCGSERIAL:
830 return moxa_get_serial_info(ch, argp);
831
832 case TIOCSSERIAL:
833 return moxa_set_serial_info(ch, argp);
834 default:
835 retval = MoxaDriverIoctl(cmd, arg, port);
836 }
837 return (retval);
838 }
839
840 static void moxa_throttle(struct tty_struct *tty)
841 {
842 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
843
844 ch->statusflags |= THROTTLE;
845 }
846
847 static void moxa_unthrottle(struct tty_struct *tty)
848 {
849 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
850
851 ch->statusflags &= ~THROTTLE;
852 }
853
854 static void moxa_set_termios(struct tty_struct *tty,
855 struct termios *old_termios)
856 {
857 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
858
859 if (ch == NULL)
860 return;
861 set_tty_param(tty);
862 if (!(old_termios->c_cflag & CLOCAL) &&
863 (tty->termios->c_cflag & CLOCAL))
864 wake_up_interruptible(&ch->open_wait);
865 }
866
867 static void moxa_stop(struct tty_struct *tty)
868 {
869 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
870
871 if (ch == NULL)
872 return;
873 MoxaPortTxDisable(ch->port);
874 ch->statusflags |= TXSTOPPED;
875 }
876
877
878 static void moxa_start(struct tty_struct *tty)
879 {
880 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
881
882 if (ch == NULL)
883 return;
884
885 if (!(ch->statusflags & TXSTOPPED))
886 return;
887
888 MoxaPortTxEnable(ch->port);
889 ch->statusflags &= ~TXSTOPPED;
890 }
891
892 static void moxa_hangup(struct tty_struct *tty)
893 {
894 struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
895
896 moxa_flush_buffer(tty);
897 shut_down(ch);
898 ch->event = 0;
899 ch->count = 0;
900 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
901 ch->tty = NULL;
902 wake_up_interruptible(&ch->open_wait);
903 }
904
905 static void moxa_poll(unsigned long ignored)
906 {
907 register int card;
908 struct moxa_str *ch;
909 struct tty_struct *tp;
910 int i, ports;
911
912 moxaTimer_on = 0;
913 del_timer(&moxaTimer);
914
915 if (MoxaDriverPoll() < 0) {
916 moxaTimer.function = moxa_poll;
917 moxaTimer.expires = jiffies + (HZ / 50);
918 moxaTimer_on = 1;
919 add_timer(&moxaTimer);
920 return;
921 }
922 for (card = 0; card < MAX_BOARDS; card++) {
923 if ((ports = MoxaPortsOfCard(card)) <= 0)
924 continue;
925 ch = &moxaChannels[card * MAX_PORTS_PER_BOARD];
926 for (i = 0; i < ports; i++, ch++) {
927 if ((ch->asyncflags & ASYNC_INITIALIZED) == 0)
928 continue;
929 if (!(ch->statusflags & THROTTLE) &&
930 (MoxaPortRxQueue(ch->port) > 0))
931 receive_data(ch);
932 if ((tp = ch->tty) == 0)
933 continue;
934 if (ch->statusflags & LOWWAIT) {
935 if (MoxaPortTxQueue(ch->port) <= WAKEUP_CHARS) {
936 if (!tp->stopped) {
937 ch->statusflags &= ~LOWWAIT;
938 tty_wakeup(tp);
939 }
940 }
941 }
942 if (!I_IGNBRK(tp) && (MoxaPortResetBrkCnt(ch->port) > 0)) {
943 tty_insert_flip_char(tp, 0, TTY_BREAK);
944 tty_schedule_flip(tp);
945 }
946 if (MoxaPortDCDChange(ch->port)) {
947 if (ch->asyncflags & ASYNC_CHECK_CD) {
948 if (MoxaPortDCDON(ch->port))
949 wake_up_interruptible(&ch->open_wait);
950 else {
951 set_bit(MOXA_EVENT_HANGUP, &ch->event);
952 schedule_work(&ch->tqueue);
953 }
954 }
955 }
956 }
957 }
958
959 moxaTimer.function = moxa_poll;
960 moxaTimer.expires = jiffies + (HZ / 50);
961 moxaTimer_on = 1;
962 add_timer(&moxaTimer);
963 }
964
965 /******************************************************************************/
966
967 static void set_tty_param(struct tty_struct *tty)
968 {
969 register struct termios *ts;
970 struct moxa_str *ch;
971 int rts, cts, txflow, rxflow, xany;
972
973 ch = (struct moxa_str *) tty->driver_data;
974 ts = tty->termios;
975 if (ts->c_cflag & CLOCAL)
976 ch->asyncflags &= ~ASYNC_CHECK_CD;
977 else
978 ch->asyncflags |= ASYNC_CHECK_CD;
979 rts = cts = txflow = rxflow = xany = 0;
980 if (ts->c_cflag & CRTSCTS)
981 rts = cts = 1;
982 if (ts->c_iflag & IXON)
983 txflow = 1;
984 if (ts->c_iflag & IXOFF)
985 rxflow = 1;
986 if (ts->c_iflag & IXANY)
987 xany = 1;
988 MoxaPortFlowCtrl(ch->port, rts, cts, txflow, rxflow, xany);
989 MoxaPortSetTermio(ch->port, ts);
990 }
991
992 static int block_till_ready(struct tty_struct *tty, struct file *filp,
993 struct moxa_str *ch)
994 {
995 DECLARE_WAITQUEUE(wait,current);
996 unsigned long flags;
997 int retval;
998 int do_clocal = C_CLOCAL(tty);
999
1000 /*
1001 * If the device is in the middle of being closed, then block
1002 * until it's done, and then try again.
1003 */
1004 if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) {
1005 if (ch->asyncflags & ASYNC_CLOSING)
1006 interruptible_sleep_on(&ch->close_wait);
1007 #ifdef SERIAL_DO_RESTART
1008 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1009 return (-EAGAIN);
1010 else
1011 return (-ERESTARTSYS);
1012 #else
1013 return (-EAGAIN);
1014 #endif
1015 }
1016 /*
1017 * If non-blocking mode is set, then make the check up front
1018 * and then exit.
1019 */
1020 if (filp->f_flags & O_NONBLOCK) {
1021 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1022 return (0);
1023 }
1024 /*
1025 * Block waiting for the carrier detect and the line to become free
1026 */
1027 retval = 0;
1028 add_wait_queue(&ch->open_wait, &wait);
1029 #ifdef SERIAL_DEBUG_OPEN
1030 printk("block_til_ready before block: ttys%d, count = %d\n",
1031 ch->line, ch->count);
1032 #endif
1033 spin_lock_irqsave(&moxa_lock, flags);
1034 if (!tty_hung_up_p(filp))
1035 ch->count--;
1036 ch->blocked_open++;
1037 spin_unlock_irqrestore(&moxa_lock, flags);
1038
1039 while (1) {
1040 set_current_state(TASK_INTERRUPTIBLE);
1041 if (tty_hung_up_p(filp) ||
1042 !(ch->asyncflags & ASYNC_INITIALIZED)) {
1043 #ifdef SERIAL_DO_RESTART
1044 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1045 retval = -EAGAIN;
1046 else
1047 retval = -ERESTARTSYS;
1048 #else
1049 retval = -EAGAIN;
1050 #endif
1051 break;
1052 }
1053 if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
1054 MoxaPortDCDON(ch->port)))
1055 break;
1056
1057 if (signal_pending(current)) {
1058 retval = -ERESTARTSYS;
1059 break;
1060 }
1061 schedule();
1062 }
1063 set_current_state(TASK_RUNNING);
1064 remove_wait_queue(&ch->open_wait, &wait);
1065
1066 spin_lock_irqsave(&moxa_lock, flags);
1067 if (!tty_hung_up_p(filp))
1068 ch->count++;
1069 ch->blocked_open--;
1070 spin_unlock_irqrestore(&moxa_lock, flags);
1071 #ifdef SERIAL_DEBUG_OPEN
1072 printk("block_til_ready after blocking: ttys%d, count = %d\n",
1073 ch->line, ch->count);
1074 #endif
1075 if (retval)
1076 return (retval);
1077 /* FIXME: review to see if we need to use set_bit on these */
1078 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1079 return 0;
1080 }
1081
1082 static void setup_empty_event(struct tty_struct *tty)
1083 {
1084 struct moxa_str *ch = tty->driver_data;
1085 unsigned long flags;
1086
1087 spin_lock_irqsave(&moxa_lock, flags);
1088 ch->statusflags |= EMPTYWAIT;
1089 moxaEmptyTimer_on[ch->port] = 0;
1090 del_timer(&moxaEmptyTimer[ch->port]);
1091 moxaEmptyTimer[ch->port].expires = jiffies + HZ;
1092 moxaEmptyTimer_on[ch->port] = 1;
1093 add_timer(&moxaEmptyTimer[ch->port]);
1094 spin_unlock_irqrestore(&moxa_lock, flags);
1095 }
1096
1097 static void check_xmit_empty(unsigned long data)
1098 {
1099 struct moxa_str *ch;
1100
1101 ch = (struct moxa_str *) data;
1102 moxaEmptyTimer_on[ch->port] = 0;
1103 del_timer(&moxaEmptyTimer[ch->port]);
1104 if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
1105 if (MoxaPortTxQueue(ch->port) == 0) {
1106 ch->statusflags &= ~EMPTYWAIT;
1107 tty_wakeup(ch->tty);
1108 return;
1109 }
1110 moxaEmptyTimer[ch->port].expires = jiffies + HZ;
1111 moxaEmptyTimer_on[ch->port] = 1;
1112 add_timer(&moxaEmptyTimer[ch->port]);
1113 } else
1114 ch->statusflags &= ~EMPTYWAIT;
1115 }
1116
1117 static void shut_down(struct moxa_str *ch)
1118 {
1119 struct tty_struct *tp;
1120
1121 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1122 return;
1123
1124 tp = ch->tty;
1125
1126 MoxaPortDisable(ch->port);
1127
1128 /*
1129 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1130 */
1131 if (tp->termios->c_cflag & HUPCL)
1132 MoxaPortLineCtrl(ch->port, 0, 0);
1133
1134 ch->asyncflags &= ~ASYNC_INITIALIZED;
1135 }
1136
1137 static void receive_data(struct moxa_str *ch)
1138 {
1139 struct tty_struct *tp;
1140 struct termios *ts;
1141 unsigned long flags;
1142
1143 ts = NULL;
1144 tp = ch->tty;
1145 if (tp)
1146 ts = tp->termios;
1147 /**************************************************
1148 if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
1149 *****************************************************/
1150 if (!tp || !ts) {
1151 MoxaPortFlushData(ch->port, 0);
1152 return;
1153 }
1154 spin_lock_irqsave(&moxa_lock, flags);
1155 MoxaPortReadData(ch->port, tp);
1156 spin_unlock_irqrestore(&moxa_lock, flags);
1157 tty_schedule_flip(tp);
1158 }
1159
1160 #define Magic_code 0x404
1161
1162 /*
1163 * System Configuration
1164 */
1165 /*
1166 * for C218 BIOS initialization
1167 */
1168 #define C218_ConfBase 0x800
1169 #define C218_status (C218_ConfBase + 0) /* BIOS running status */
1170 #define C218_diag (C218_ConfBase + 2) /* diagnostic status */
1171 #define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
1172 #define C218DLoad_len (C218_ConfBase + 6) /* WORD */
1173 #define C218check_sum (C218_ConfBase + 8) /* BYTE */
1174 #define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
1175 #define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
1176 #define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
1177 #define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
1178 #define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
1179
1180 #define C218_LoadBuf 0x0F00
1181 #define C218_KeyCode 0x218
1182 #define CP204J_KeyCode 0x204
1183
1184 /*
1185 * for C320 BIOS initialization
1186 */
1187 #define C320_ConfBase 0x800
1188 #define C320_LoadBuf 0x0f00
1189 #define STS_init 0x05 /* for C320_status */
1190
1191 #define C320_status C320_ConfBase + 0 /* BIOS running status */
1192 #define C320_diag C320_ConfBase + 2 /* diagnostic status */
1193 #define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
1194 #define C320DLoad_len C320_ConfBase + 6 /* WORD */
1195 #define C320check_sum C320_ConfBase + 8 /* WORD */
1196 #define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
1197 #define C320bapi_len C320_ConfBase + 0x0c /* WORD */
1198 #define C320UART_no C320_ConfBase + 0x0e /* WORD */
1199
1200 #define C320_KeyCode 0x320
1201
1202 #define FixPage_addr 0x0000 /* starting addr of static page */
1203 #define DynPage_addr 0x2000 /* starting addr of dynamic page */
1204 #define C218_start 0x3000 /* starting addr of C218 BIOS prg */
1205 #define Control_reg 0x1ff0 /* select page and reset control */
1206 #define HW_reset 0x80
1207
1208 /*
1209 * Function Codes
1210 */
1211 #define FC_CardReset 0x80
1212 #define FC_ChannelReset 1 /* C320 firmware not supported */
1213 #define FC_EnableCH 2
1214 #define FC_DisableCH 3
1215 #define FC_SetParam 4
1216 #define FC_SetMode 5
1217 #define FC_SetRate 6
1218 #define FC_LineControl 7
1219 #define FC_LineStatus 8
1220 #define FC_XmitControl 9
1221 #define FC_FlushQueue 10
1222 #define FC_SendBreak 11
1223 #define FC_StopBreak 12
1224 #define FC_LoopbackON 13
1225 #define FC_LoopbackOFF 14
1226 #define FC_ClrIrqTable 15
1227 #define FC_SendXon 16
1228 #define FC_SetTermIrq 17 /* C320 firmware not supported */
1229 #define FC_SetCntIrq 18 /* C320 firmware not supported */
1230 #define FC_SetBreakIrq 19
1231 #define FC_SetLineIrq 20
1232 #define FC_SetFlowCtl 21
1233 #define FC_GenIrq 22
1234 #define FC_InCD180 23
1235 #define FC_OutCD180 24
1236 #define FC_InUARTreg 23
1237 #define FC_OutUARTreg 24
1238 #define FC_SetXonXoff 25
1239 #define FC_OutCD180CCR 26
1240 #define FC_ExtIQueue 27
1241 #define FC_ExtOQueue 28
1242 #define FC_ClrLineIrq 29
1243 #define FC_HWFlowCtl 30
1244 #define FC_GetClockRate 35
1245 #define FC_SetBaud 36
1246 #define FC_SetDataMode 41
1247 #define FC_GetCCSR 43
1248 #define FC_GetDataError 45
1249 #define FC_RxControl 50
1250 #define FC_ImmSend 51
1251 #define FC_SetXonState 52
1252 #define FC_SetXoffState 53
1253 #define FC_SetRxFIFOTrig 54
1254 #define FC_SetTxFIFOCnt 55
1255 #define FC_UnixRate 56
1256 #define FC_UnixResetTimer 57
1257
1258 #define RxFIFOTrig1 0
1259 #define RxFIFOTrig4 1
1260 #define RxFIFOTrig8 2
1261 #define RxFIFOTrig14 3
1262
1263 /*
1264 * Dual-Ported RAM
1265 */
1266 #define DRAM_global 0
1267 #define INT_data (DRAM_global + 0)
1268 #define Config_base (DRAM_global + 0x108)
1269
1270 #define IRQindex (INT_data + 0)
1271 #define IRQpending (INT_data + 4)
1272 #define IRQtable (INT_data + 8)
1273
1274 /*
1275 * Interrupt Status
1276 */
1277 #define IntrRx 0x01 /* receiver data O.K. */
1278 #define IntrTx 0x02 /* transmit buffer empty */
1279 #define IntrFunc 0x04 /* function complete */
1280 #define IntrBreak 0x08 /* received break */
1281 #define IntrLine 0x10 /* line status change
1282 for transmitter */
1283 #define IntrIntr 0x20 /* received INTR code */
1284 #define IntrQuit 0x40 /* received QUIT code */
1285 #define IntrEOF 0x80 /* received EOF code */
1286
1287 #define IntrRxTrigger 0x100 /* rx data count reach tigger value */
1288 #define IntrTxTrigger 0x200 /* tx data count below trigger value */
1289
1290 #define Magic_no (Config_base + 0)
1291 #define Card_model_no (Config_base + 2)
1292 #define Total_ports (Config_base + 4)
1293 #define Module_cnt (Config_base + 8)
1294 #define Module_no (Config_base + 10)
1295 #define Timer_10ms (Config_base + 14)
1296 #define Disable_IRQ (Config_base + 20)
1297 #define TMS320_PORT1 (Config_base + 22)
1298 #define TMS320_PORT2 (Config_base + 24)
1299 #define TMS320_CLOCK (Config_base + 26)
1300
1301 /*
1302 * DATA BUFFER in DRAM
1303 */
1304 #define Extern_table 0x400 /* Base address of the external table
1305 (24 words * 64) total 3K bytes
1306 (24 words * 128) total 6K bytes */
1307 #define Extern_size 0x60 /* 96 bytes */
1308 #define RXrptr 0x00 /* read pointer for RX buffer */
1309 #define RXwptr 0x02 /* write pointer for RX buffer */
1310 #define TXrptr 0x04 /* read pointer for TX buffer */
1311 #define TXwptr 0x06 /* write pointer for TX buffer */
1312 #define HostStat 0x08 /* IRQ flag and general flag */
1313 #define FlagStat 0x0A
1314 #define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
1315 /* x x x x | | | | */
1316 /* | | | + CTS flow */
1317 /* | | +--- RTS flow */
1318 /* | +------ TX Xon/Xoff */
1319 /* +--------- RX Xon/Xoff */
1320 #define Break_cnt 0x0E /* received break count */
1321 #define CD180TXirq 0x10 /* if non-0: enable TX irq */
1322 #define RX_mask 0x12
1323 #define TX_mask 0x14
1324 #define Ofs_rxb 0x16
1325 #define Ofs_txb 0x18
1326 #define Page_rxb 0x1A
1327 #define Page_txb 0x1C
1328 #define EndPage_rxb 0x1E
1329 #define EndPage_txb 0x20
1330 #define Data_error 0x22
1331 #define RxTrigger 0x28
1332 #define TxTrigger 0x2a
1333
1334 #define rRXwptr 0x34
1335 #define Low_water 0x36
1336
1337 #define FuncCode 0x40
1338 #define FuncArg 0x42
1339 #define FuncArg1 0x44
1340
1341 #define C218rx_size 0x2000 /* 8K bytes */
1342 #define C218tx_size 0x8000 /* 32K bytes */
1343
1344 #define C218rx_mask (C218rx_size - 1)
1345 #define C218tx_mask (C218tx_size - 1)
1346
1347 #define C320p8rx_size 0x2000
1348 #define C320p8tx_size 0x8000
1349 #define C320p8rx_mask (C320p8rx_size - 1)
1350 #define C320p8tx_mask (C320p8tx_size - 1)
1351
1352 #define C320p16rx_size 0x2000
1353 #define C320p16tx_size 0x4000
1354 #define C320p16rx_mask (C320p16rx_size - 1)
1355 #define C320p16tx_mask (C320p16tx_size - 1)
1356
1357 #define C320p24rx_size 0x2000
1358 #define C320p24tx_size 0x2000
1359 #define C320p24rx_mask (C320p24rx_size - 1)
1360 #define C320p24tx_mask (C320p24tx_size - 1)
1361
1362 #define C320p32rx_size 0x1000
1363 #define C320p32tx_size 0x1000
1364 #define C320p32rx_mask (C320p32rx_size - 1)
1365 #define C320p32tx_mask (C320p32tx_size - 1)
1366
1367 #define Page_size 0x2000
1368 #define Page_mask (Page_size - 1)
1369 #define C218rx_spage 3
1370 #define C218tx_spage 4
1371 #define C218rx_pageno 1
1372 #define C218tx_pageno 4
1373 #define C218buf_pageno 5
1374
1375 #define C320p8rx_spage 3
1376 #define C320p8tx_spage 4
1377 #define C320p8rx_pgno 1
1378 #define C320p8tx_pgno 4
1379 #define C320p8buf_pgno 5
1380
1381 #define C320p16rx_spage 3
1382 #define C320p16tx_spage 4
1383 #define C320p16rx_pgno 1
1384 #define C320p16tx_pgno 2
1385 #define C320p16buf_pgno 3
1386
1387 #define C320p24rx_spage 3
1388 #define C320p24tx_spage 4
1389 #define C320p24rx_pgno 1
1390 #define C320p24tx_pgno 1
1391 #define C320p24buf_pgno 2
1392
1393 #define C320p32rx_spage 3
1394 #define C320p32tx_ofs C320p32rx_size
1395 #define C320p32tx_spage 3
1396 #define C320p32buf_pgno 1
1397
1398 /*
1399 * Host Status
1400 */
1401 #define WakeupRx 0x01
1402 #define WakeupTx 0x02
1403 #define WakeupBreak 0x08
1404 #define WakeupLine 0x10
1405 #define WakeupIntr 0x20
1406 #define WakeupQuit 0x40
1407 #define WakeupEOF 0x80 /* used in VTIME control */
1408 #define WakeupRxTrigger 0x100
1409 #define WakeupTxTrigger 0x200
1410 /*
1411 * Flag status
1412 */
1413 #define Rx_over 0x01
1414 #define Xoff_state 0x02
1415 #define Tx_flowOff 0x04
1416 #define Tx_enable 0x08
1417 #define CTS_state 0x10
1418 #define DSR_state 0x20
1419 #define DCD_state 0x80
1420 /*
1421 * FlowControl
1422 */
1423 #define CTS_FlowCtl 1
1424 #define RTS_FlowCtl 2
1425 #define Tx_FlowCtl 4
1426 #define Rx_FlowCtl 8
1427 #define IXM_IXANY 0x10
1428
1429 #define LowWater 128
1430
1431 #define DTR_ON 1
1432 #define RTS_ON 2
1433 #define CTS_ON 1
1434 #define DSR_ON 2
1435 #define DCD_ON 8
1436
1437 /* mode definition */
1438 #define MX_CS8 0x03
1439 #define MX_CS7 0x02
1440 #define MX_CS6 0x01
1441 #define MX_CS5 0x00
1442
1443 #define MX_STOP1 0x00
1444 #define MX_STOP15 0x04
1445 #define MX_STOP2 0x08
1446
1447 #define MX_PARNONE 0x00
1448 #define MX_PAREVEN 0x40
1449 #define MX_PARODD 0xC0
1450
1451 /*
1452 * Query
1453 */
1454 #define QueryPort MAX_PORTS
1455
1456
1457
1458 struct mon_str {
1459 int tick;
1460 int rxcnt[MAX_PORTS];
1461 int txcnt[MAX_PORTS];
1462 };
1463 typedef struct mon_str mon_st;
1464
1465 #define DCD_changed 0x01
1466 #define DCD_oldstate 0x80
1467
1468 static unsigned char moxaBuff[10240];
1469 static void __iomem *moxaIntNdx[MAX_BOARDS];
1470 static void __iomem *moxaIntPend[MAX_BOARDS];
1471 static void __iomem *moxaIntTable[MAX_BOARDS];
1472 static char moxaChkPort[MAX_PORTS];
1473 static char moxaLineCtrl[MAX_PORTS];
1474 static void __iomem *moxaTableAddr[MAX_PORTS];
1475 static long moxaCurBaud[MAX_PORTS];
1476 static char moxaDCDState[MAX_PORTS];
1477 static char moxaLowChkFlag[MAX_PORTS];
1478 static int moxaLowWaterChk;
1479 static int moxaCard;
1480 static mon_st moxaLog;
1481 static int moxaFuncTout;
1482 static ushort moxaBreakCnt[MAX_PORTS];
1483
1484 static void moxadelay(int);
1485 static void moxafunc(void __iomem *, int, ushort);
1486 static void wait_finish(void __iomem *);
1487 static void low_water_check(void __iomem *);
1488 static int moxaloadbios(int, unsigned char __user *, int);
1489 static int moxafindcard(int);
1490 static int moxaload320b(int, unsigned char __user *, int);
1491 static int moxaloadcode(int, unsigned char __user *, int);
1492 static int moxaloadc218(int, void __iomem *, int);
1493 static int moxaloadc320(int, void __iomem *, int, int *);
1494
1495 /*****************************************************************************
1496 * Driver level functions: *
1497 * 1. MoxaDriverInit(void); *
1498 * 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); *
1499 * 3. MoxaDriverPoll(void); *
1500 *****************************************************************************/
1501 void MoxaDriverInit(void)
1502 {
1503 int i;
1504
1505 moxaFuncTout = HZ / 2; /* 500 mini-seconds */
1506 moxaCard = 0;
1507 moxaLog.tick = 0;
1508 moxaLowWaterChk = 0;
1509 for (i = 0; i < MAX_PORTS; i++) {
1510 moxaChkPort[i] = 0;
1511 moxaLowChkFlag[i] = 0;
1512 moxaLineCtrl[i] = 0;
1513 moxaLog.rxcnt[i] = 0;
1514 moxaLog.txcnt[i] = 0;
1515 }
1516 }
1517
1518 #define MOXA 0x400
1519 #define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
1520 #define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
1521 #define MOXA_INIT_DRIVER (MOXA + 6) /* moxaCard=0 */
1522 #define MOXA_LOAD_BIOS (MOXA + 9) /* download BIOS */
1523 #define MOXA_FIND_BOARD (MOXA + 10) /* Check if MOXA card exist? */
1524 #define MOXA_LOAD_C320B (MOXA + 11) /* download 320B firmware */
1525 #define MOXA_LOAD_CODE (MOXA + 12) /* download firmware */
1526 #define MOXA_GETDATACOUNT (MOXA + 23)
1527 #define MOXA_GET_IOQUEUE (MOXA + 27)
1528 #define MOXA_FLUSH_QUEUE (MOXA + 28)
1529 #define MOXA_GET_CONF (MOXA + 35) /* configuration */
1530 #define MOXA_GET_MAJOR (MOXA + 63)
1531 #define MOXA_GET_CUMAJOR (MOXA + 64)
1532 #define MOXA_GETMSTATUS (MOXA + 65)
1533
1534
1535 struct moxaq_str {
1536 int inq;
1537 int outq;
1538 };
1539
1540 struct dl_str {
1541 char __user *buf;
1542 int len;
1543 int cardno;
1544 };
1545
1546 static struct moxaq_str temp_queue[MAX_PORTS];
1547 static struct dl_str dltmp;
1548
1549 void MoxaPortFlushData(int port, int mode)
1550 {
1551 void __iomem *ofsAddr;
1552 if ((mode < 0) || (mode > 2))
1553 return;
1554 ofsAddr = moxaTableAddr[port];
1555 moxafunc(ofsAddr, FC_FlushQueue, mode);
1556 if (mode != 1) {
1557 moxaLowChkFlag[port] = 0;
1558 low_water_check(ofsAddr);
1559 }
1560 }
1561
1562 int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port)
1563 {
1564 int i;
1565 int status;
1566 int MoxaPortTxQueue(int), MoxaPortRxQueue(int);
1567 void __user *argp = (void __user *)arg;
1568
1569 if (port == QueryPort) {
1570 if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_INIT_DRIVER) &&
1571 (cmd != MOXA_LOAD_BIOS) && (cmd != MOXA_FIND_BOARD) && (cmd != MOXA_LOAD_C320B) &&
1572 (cmd != MOXA_LOAD_CODE) && (cmd != MOXA_GETDATACOUNT) &&
1573 (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
1574 (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
1575 return (-EINVAL);
1576 }
1577 switch (cmd) {
1578 case MOXA_GET_CONF:
1579 if(copy_to_user(argp, &moxa_boards, MAX_BOARDS * sizeof(moxa_board_conf)))
1580 return -EFAULT;
1581 return (0);
1582 case MOXA_INIT_DRIVER:
1583 if ((int) arg == 0x404)
1584 MoxaDriverInit();
1585 return (0);
1586 case MOXA_GETDATACOUNT:
1587 moxaLog.tick = jiffies;
1588 if(copy_to_user(argp, &moxaLog, sizeof(mon_st)))
1589 return -EFAULT;
1590 return (0);
1591 case MOXA_FLUSH_QUEUE:
1592 MoxaPortFlushData(port, arg);
1593 return (0);
1594 case MOXA_GET_IOQUEUE:
1595 for (i = 0; i < MAX_PORTS; i++) {
1596 if (moxaChkPort[i]) {
1597 temp_queue[i].inq = MoxaPortRxQueue(i);
1598 temp_queue[i].outq = MoxaPortTxQueue(i);
1599 }
1600 }
1601 if(copy_to_user(argp, temp_queue, sizeof(struct moxaq_str) * MAX_PORTS))
1602 return -EFAULT;
1603 return (0);
1604 case MOXA_GET_OQUEUE:
1605 i = MoxaPortTxQueue(port);
1606 return put_user(i, (unsigned long __user *)argp);
1607 case MOXA_GET_IQUEUE:
1608 i = MoxaPortRxQueue(port);
1609 return put_user(i, (unsigned long __user *)argp);
1610 case MOXA_GET_MAJOR:
1611 if(copy_to_user(argp, &ttymajor, sizeof(int)))
1612 return -EFAULT;
1613 return 0;
1614 case MOXA_GET_CUMAJOR:
1615 i = 0;
1616 if(copy_to_user(argp, &i, sizeof(int)))
1617 return -EFAULT;
1618 return 0;
1619 case MOXA_GETMSTATUS:
1620 for (i = 0; i < MAX_PORTS; i++) {
1621 GMStatus[i].ri = 0;
1622 GMStatus[i].dcd = 0;
1623 GMStatus[i].dsr = 0;
1624 GMStatus[i].cts = 0;
1625 if (!moxaChkPort[i]) {
1626 continue;
1627 } else {
1628 status = MoxaPortLineStatus(moxaChannels[i].port);
1629 if (status & 1)
1630 GMStatus[i].cts = 1;
1631 if (status & 2)
1632 GMStatus[i].dsr = 1;
1633 if (status & 4)
1634 GMStatus[i].dcd = 1;
1635 }
1636
1637 if (!moxaChannels[i].tty || !moxaChannels[i].tty->termios)
1638 GMStatus[i].cflag = moxaChannels[i].cflag;
1639 else
1640 GMStatus[i].cflag = moxaChannels[i].tty->termios->c_cflag;
1641 }
1642 if(copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MAX_PORTS))
1643 return -EFAULT;
1644 return 0;
1645 default:
1646 return (-ENOIOCTLCMD);
1647 case MOXA_LOAD_BIOS:
1648 case MOXA_FIND_BOARD:
1649 case MOXA_LOAD_C320B:
1650 case MOXA_LOAD_CODE:
1651 if (!capable(CAP_SYS_RAWIO))
1652 return -EPERM;
1653 break;
1654 }
1655
1656 if(copy_from_user(&dltmp, argp, sizeof(struct dl_str)))
1657 return -EFAULT;
1658 if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS)
1659 return -EINVAL;
1660
1661 switch(cmd)
1662 {
1663 case MOXA_LOAD_BIOS:
1664 i = moxaloadbios(dltmp.cardno, dltmp.buf, dltmp.len);
1665 return (i);
1666 case MOXA_FIND_BOARD:
1667 return moxafindcard(dltmp.cardno);
1668 case MOXA_LOAD_C320B:
1669 moxaload320b(dltmp.cardno, dltmp.buf, dltmp.len);
1670 default: /* to keep gcc happy */
1671 return (0);
1672 case MOXA_LOAD_CODE:
1673 i = moxaloadcode(dltmp.cardno, dltmp.buf, dltmp.len);
1674 if (i == -1)
1675 return (-EFAULT);
1676 return (i);
1677
1678 }
1679 }
1680
1681 int MoxaDriverPoll(void)
1682 {
1683 register ushort temp;
1684 register int card;
1685 void __iomem *ofsAddr;
1686 void __iomem *ip;
1687 int port, p, ports;
1688
1689 if (moxaCard == 0)
1690 return (-1);
1691 for (card = 0; card < MAX_BOARDS; card++) {
1692 if (loadstat[card] == 0)
1693 continue;
1694 if ((ports = moxa_boards[card].numPorts) == 0)
1695 continue;
1696 if (readb(moxaIntPend[card]) == 0xff) {
1697 ip = moxaIntTable[card] + readb(moxaIntNdx[card]);
1698 p = card * MAX_PORTS_PER_BOARD;
1699 ports <<= 1;
1700 for (port = 0; port < ports; port += 2, p++) {
1701 if ((temp = readw(ip + port)) != 0) {
1702 writew(0, ip + port);
1703 ofsAddr = moxaTableAddr[p];
1704 if (temp & IntrTx)
1705 writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat);
1706 if (temp & IntrBreak) {
1707 moxaBreakCnt[p]++;
1708 }
1709 if (temp & IntrLine) {
1710 if (readb(ofsAddr + FlagStat) & DCD_state) {
1711 if ((moxaDCDState[p] & DCD_oldstate) == 0)
1712 moxaDCDState[p] = (DCD_oldstate |
1713 DCD_changed);
1714 } else {
1715 if (moxaDCDState[p] & DCD_oldstate)
1716 moxaDCDState[p] = DCD_changed;
1717 }
1718 }
1719 }
1720 }
1721 writeb(0, moxaIntPend[card]);
1722 }
1723 if (moxaLowWaterChk) {
1724 p = card * MAX_PORTS_PER_BOARD;
1725 for (port = 0; port < ports; port++, p++) {
1726 if (moxaLowChkFlag[p]) {
1727 moxaLowChkFlag[p] = 0;
1728 ofsAddr = moxaTableAddr[p];
1729 low_water_check(ofsAddr);
1730 }
1731 }
1732 }
1733 }
1734 moxaLowWaterChk = 0;
1735 return (0);
1736 }
1737
1738 /*****************************************************************************
1739 * Card level function: *
1740 * 1. MoxaPortsOfCard(int cardno); *
1741 *****************************************************************************/
1742 int MoxaPortsOfCard(int cardno)
1743 {
1744
1745 if (moxa_boards[cardno].boardType == 0)
1746 return (0);
1747 return (moxa_boards[cardno].numPorts);
1748 }
1749
1750 /*****************************************************************************
1751 * Port level functions: *
1752 * 1. MoxaPortIsValid(int port); *
1753 * 2. MoxaPortEnable(int port); *
1754 * 3. MoxaPortDisable(int port); *
1755 * 4. MoxaPortGetMaxBaud(int port); *
1756 * 5. MoxaPortGetCurBaud(int port); *
1757 * 6. MoxaPortSetBaud(int port, long baud); *
1758 * 7. MoxaPortSetMode(int port, int databit, int stopbit, int parity); *
1759 * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
1760 * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
1761 * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
1762 * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
1763 * 12. MoxaPortLineStatus(int port); *
1764 * 13. MoxaPortDCDChange(int port); *
1765 * 14. MoxaPortDCDON(int port); *
1766 * 15. MoxaPortFlushData(int port, int mode); *
1767 * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
1768 * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
1769 * 18. MoxaPortTxBufSize(int port); *
1770 * 19. MoxaPortRxBufSize(int port); *
1771 * 20. MoxaPortTxQueue(int port); *
1772 * 21. MoxaPortTxFree(int port); *
1773 * 22. MoxaPortRxQueue(int port); *
1774 * 23. MoxaPortRxFree(int port); *
1775 * 24. MoxaPortTxDisable(int port); *
1776 * 25. MoxaPortTxEnable(int port); *
1777 * 26. MoxaPortGetBrkCnt(int port); *
1778 * 27. MoxaPortResetBrkCnt(int port); *
1779 * 28. MoxaPortSetXonXoff(int port, int xonValue, int xoffValue); *
1780 * 29. MoxaPortIsTxHold(int port); *
1781 * 30. MoxaPortSendBreak(int port, int ticks); *
1782 *****************************************************************************/
1783 /*
1784 * Moxa Port Number Description:
1785 *
1786 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1787 * the port number using in MOXA driver functions will be 0 to 31 for
1788 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1789 * to 127 for fourth. For example, if you setup three MOXA boards,
1790 * first board is C218, second board is C320-16 and third board is
1791 * C320-32. The port number of first board (C218 - 8 ports) is from
1792 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1793 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1794 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1795 * 127 will be invalid.
1796 *
1797 *
1798 * Moxa Functions Description:
1799 *
1800 * Function 1: Driver initialization routine, this routine must be
1801 * called when initialized driver.
1802 * Syntax:
1803 * void MoxaDriverInit();
1804 *
1805 *
1806 * Function 2: Moxa driver private IOCTL command processing.
1807 * Syntax:
1808 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1809 *
1810 * unsigned int cmd : IOCTL command
1811 * unsigned long arg : IOCTL argument
1812 * int port : port number (0 - 127)
1813 *
1814 * return: 0 (OK)
1815 * -EINVAL
1816 * -ENOIOCTLCMD
1817 *
1818 *
1819 * Function 3: Moxa driver polling process routine.
1820 * Syntax:
1821 * int MoxaDriverPoll(void);
1822 *
1823 * return: 0 ; polling O.K.
1824 * -1 : no any Moxa card.
1825 *
1826 *
1827 * Function 4: Get the ports of this card.
1828 * Syntax:
1829 * int MoxaPortsOfCard(int cardno);
1830 *
1831 * int cardno : card number (0 - 3)
1832 *
1833 * return: 0 : this card is invalid
1834 * 8/16/24/32
1835 *
1836 *
1837 * Function 5: Check this port is valid or invalid
1838 * Syntax:
1839 * int MoxaPortIsValid(int port);
1840 * int port : port number (0 - 127, ref port description)
1841 *
1842 * return: 0 : this port is invalid
1843 * 1 : this port is valid
1844 *
1845 *
1846 * Function 6: Enable this port to start Tx/Rx data.
1847 * Syntax:
1848 * void MoxaPortEnable(int port);
1849 * int port : port number (0 - 127)
1850 *
1851 *
1852 * Function 7: Disable this port
1853 * Syntax:
1854 * void MoxaPortDisable(int port);
1855 * int port : port number (0 - 127)
1856 *
1857 *
1858 * Function 8: Get the maximun available baud rate of this port.
1859 * Syntax:
1860 * long MoxaPortGetMaxBaud(int port);
1861 * int port : port number (0 - 127)
1862 *
1863 * return: 0 : this port is invalid
1864 * 38400/57600/115200 bps
1865 *
1866 *
1867 * Function 9: Get the current baud rate of this port.
1868 * Syntax:
1869 * long MoxaPortGetCurBaud(int port);
1870 * int port : port number (0 - 127)
1871 *
1872 * return: 0 : this port is invalid
1873 * 50 - 115200 bps
1874 *
1875 *
1876 * Function 10: Setting baud rate of this port.
1877 * Syntax:
1878 * long MoxaPortSetBaud(int port, long baud);
1879 * int port : port number (0 - 127)
1880 * long baud : baud rate (50 - 115200)
1881 *
1882 * return: 0 : this port is invalid or baud < 50
1883 * 50 - 115200 : the real baud rate set to the port, if
1884 * the argument baud is large than maximun
1885 * available baud rate, the real setting
1886 * baud rate will be the maximun baud rate.
1887 *
1888 *
1889 * Function 11: Setting the data-bits/stop-bits/parity of this port
1890 * Syntax:
1891 * int MoxaPortSetMode(int port, int databits, int stopbits, int parity);
1892 * int port : port number (0 - 127)
1893 * int databits : data bits (8/7/6/5)
1894 * int stopbits : stop bits (2/1/0, 0 show 1.5 stop bits)
1895 int parity : parity (0:None,1:Odd,2:Even,3:Mark,4:Space)
1896 *
1897 * return: -1 : invalid parameter
1898 * 0 : setting O.K.
1899 *
1900 *
1901 * Function 12: Configure the port.
1902 * Syntax:
1903 * int MoxaPortSetTermio(int port, struct termios *termio);
1904 * int port : port number (0 - 127)
1905 * struct termios * termio : termio structure pointer
1906 *
1907 * return: -1 : this port is invalid or termio == NULL
1908 * 0 : setting O.K.
1909 *
1910 *
1911 * Function 13: Get the DTR/RTS state of this port.
1912 * Syntax:
1913 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1914 * int port : port number (0 - 127)
1915 * int * dtrState : pointer to INT to receive the current DTR
1916 * state. (if NULL, this function will not
1917 * write to this address)
1918 * int * rtsState : pointer to INT to receive the current RTS
1919 * state. (if NULL, this function will not
1920 * write to this address)
1921 *
1922 * return: -1 : this port is invalid
1923 * 0 : O.K.
1924 *
1925 *
1926 * Function 14: Setting the DTR/RTS output state of this port.
1927 * Syntax:
1928 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1929 * int port : port number (0 - 127)
1930 * int dtrState : DTR output state (0: off, 1: on)
1931 * int rtsState : RTS output state (0: off, 1: on)
1932 *
1933 *
1934 * Function 15: Setting the flow control of this port.
1935 * Syntax:
1936 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1937 * int txFlow,int xany);
1938 * int port : port number (0 - 127)
1939 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1940 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1941 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1942 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1943 * int xany : S/W XANY flow control (0: no, 1: yes)
1944 *
1945 *
1946 * Function 16: Get ths line status of this port
1947 * Syntax:
1948 * int MoxaPortLineStatus(int port);
1949 * int port : port number (0 - 127)
1950 *
1951 * return: Bit 0 - CTS state (0: off, 1: on)
1952 * Bit 1 - DSR state (0: off, 1: on)
1953 * Bit 2 - DCD state (0: off, 1: on)
1954 *
1955 *
1956 * Function 17: Check the DCD state has changed since the last read
1957 * of this function.
1958 * Syntax:
1959 * int MoxaPortDCDChange(int port);
1960 * int port : port number (0 - 127)
1961 *
1962 * return: 0 : no changed
1963 * 1 : DCD has changed
1964 *
1965 *
1966 * Function 18: Check ths current DCD state is ON or not.
1967 * Syntax:
1968 * int MoxaPortDCDON(int port);
1969 * int port : port number (0 - 127)
1970 *
1971 * return: 0 : DCD off
1972 * 1 : DCD on
1973 *
1974 *
1975 * Function 19: Flush the Rx/Tx buffer data of this port.
1976 * Syntax:
1977 * void MoxaPortFlushData(int port, int mode);
1978 * int port : port number (0 - 127)
1979 * int mode
1980 * 0 : flush the Rx buffer
1981 * 1 : flush the Tx buffer
1982 * 2 : flush the Rx and Tx buffer
1983 *
1984 *
1985 * Function 20: Write data.
1986 * Syntax:
1987 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1988 * int port : port number (0 - 127)
1989 * unsigned char * buffer : pointer to write data buffer.
1990 * int length : write data length
1991 *
1992 * return: 0 - length : real write data length
1993 *
1994 *
1995 * Function 21: Read data.
1996 * Syntax:
1997 * int MoxaPortReadData(int port, struct tty_struct *tty);
1998 * int port : port number (0 - 127)
1999 * struct tty_struct *tty : tty for data
2000 *
2001 * return: 0 - length : real read data length
2002 *
2003 *
2004 * Function 22: Get the Tx buffer size of this port
2005 * Syntax:
2006 * int MoxaPortTxBufSize(int port);
2007 * int port : port number (0 - 127)
2008 *
2009 * return: .. : Tx buffer size
2010 *
2011 *
2012 * Function 23: Get the Rx buffer size of this port
2013 * Syntax:
2014 * int MoxaPortRxBufSize(int port);
2015 * int port : port number (0 - 127)
2016 *
2017 * return: .. : Rx buffer size
2018 *
2019 *
2020 * Function 24: Get the Tx buffer current queued data bytes
2021 * Syntax:
2022 * int MoxaPortTxQueue(int port);
2023 * int port : port number (0 - 127)
2024 *
2025 * return: .. : Tx buffer current queued data bytes
2026 *
2027 *
2028 * Function 25: Get the Tx buffer current free space
2029 * Syntax:
2030 * int MoxaPortTxFree(int port);
2031 * int port : port number (0 - 127)
2032 *
2033 * return: .. : Tx buffer current free space
2034 *
2035 *
2036 * Function 26: Get the Rx buffer current queued data bytes
2037 * Syntax:
2038 * int MoxaPortRxQueue(int port);
2039 * int port : port number (0 - 127)
2040 *
2041 * return: .. : Rx buffer current queued data bytes
2042 *
2043 *
2044 * Function 27: Get the Rx buffer current free space
2045 * Syntax:
2046 * int MoxaPortRxFree(int port);
2047 * int port : port number (0 - 127)
2048 *
2049 * return: .. : Rx buffer current free space
2050 *
2051 *
2052 * Function 28: Disable port data transmission.
2053 * Syntax:
2054 * void MoxaPortTxDisable(int port);
2055 * int port : port number (0 - 127)
2056 *
2057 *
2058 * Function 29: Enable port data transmission.
2059 * Syntax:
2060 * void MoxaPortTxEnable(int port);
2061 * int port : port number (0 - 127)
2062 *
2063 *
2064 * Function 30: Get the received BREAK signal count.
2065 * Syntax:
2066 * int MoxaPortGetBrkCnt(int port);
2067 * int port : port number (0 - 127)
2068 *
2069 * return: 0 - .. : BREAK signal count
2070 *
2071 *
2072 * Function 31: Get the received BREAK signal count and reset it.
2073 * Syntax:
2074 * int MoxaPortResetBrkCnt(int port);
2075 * int port : port number (0 - 127)
2076 *
2077 * return: 0 - .. : BREAK signal count
2078 *
2079 *
2080 * Function 32: Set the S/W flow control new XON/XOFF value, default
2081 * XON is 0x11 & XOFF is 0x13.
2082 * Syntax:
2083 * void MoxaPortSetXonXoff(int port, int xonValue, int xoffValue);
2084 * int port : port number (0 - 127)
2085 * int xonValue : new XON value (0 - 255)
2086 * int xoffValue : new XOFF value (0 - 255)
2087 *
2088 *
2089 * Function 33: Check this port's transmission is hold by remote site
2090 * because the flow control.
2091 * Syntax:
2092 * int MoxaPortIsTxHold(int port);
2093 * int port : port number (0 - 127)
2094 *
2095 * return: 0 : normal
2096 * 1 : hold by remote site
2097 *
2098 *
2099 * Function 34: Send out a BREAK signal.
2100 * Syntax:
2101 * void MoxaPortSendBreak(int port, int ms100);
2102 * int port : port number (0 - 127)
2103 * int ms100 : break signal time interval.
2104 * unit: 100 mini-second. if ms100 == 0, it will
2105 * send out a about 250 ms BREAK signal.
2106 *
2107 */
2108 int MoxaPortIsValid(int port)
2109 {
2110
2111 if (moxaCard == 0)
2112 return (0);
2113 if (moxaChkPort[port] == 0)
2114 return (0);
2115 return (1);
2116 }
2117
2118 void MoxaPortEnable(int port)
2119 {
2120 void __iomem *ofsAddr;
2121 int MoxaPortLineStatus(int);
2122 short lowwater = 512;
2123
2124 ofsAddr = moxaTableAddr[port];
2125 writew(lowwater, ofsAddr + Low_water);
2126 moxaBreakCnt[port] = 0;
2127 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
2128 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
2129 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
2130 } else {
2131 writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
2132 }
2133
2134 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
2135 moxafunc(ofsAddr, FC_FlushQueue, 2);
2136
2137 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
2138 MoxaPortLineStatus(port);
2139 }
2140
2141 void MoxaPortDisable(int port)
2142 {
2143 void __iomem *ofsAddr = moxaTableAddr[port];
2144
2145 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
2146 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
2147 writew(0, ofsAddr + HostStat);
2148 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
2149 }
2150
2151 long MoxaPortGetMaxBaud(int port)
2152 {
2153 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
2154 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI))
2155 return (460800L);
2156 else
2157 return (921600L);
2158 }
2159
2160
2161 long MoxaPortSetBaud(int port, long baud)
2162 {
2163 void __iomem *ofsAddr;
2164 long max, clock;
2165 unsigned int val;
2166
2167 if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
2168 return (0);
2169 ofsAddr = moxaTableAddr[port];
2170 if (baud > max)
2171 baud = max;
2172 if (max == 38400L)
2173 clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
2174 else if (max == 57600L)
2175 clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
2176 else
2177 clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
2178 val = clock / baud;
2179 moxafunc(ofsAddr, FC_SetBaud, val);
2180 baud = clock / val;
2181 moxaCurBaud[port] = baud;
2182 return (baud);
2183 }
2184
2185 int MoxaPortSetTermio(int port, struct termios *termio)
2186 {
2187 void __iomem *ofsAddr;
2188 tcflag_t cflag;
2189 long baud;
2190 tcflag_t mode = 0;
2191
2192 if (moxaChkPort[port] == 0 || termio == 0)
2193 return (-1);
2194 ofsAddr = moxaTableAddr[port];
2195 cflag = termio->c_cflag; /* termio->c_cflag */
2196
2197 mode = termio->c_cflag & CSIZE;
2198 if (mode == CS5)
2199 mode = MX_CS5;
2200 else if (mode == CS6)
2201 mode = MX_CS6;
2202 else if (mode == CS7)
2203 mode = MX_CS7;
2204 else if (mode == CS8)
2205 mode = MX_CS8;
2206
2207 if (termio->c_cflag & CSTOPB) {
2208 if (mode == MX_CS5)
2209 mode |= MX_STOP15;
2210 else
2211 mode |= MX_STOP2;
2212 } else
2213 mode |= MX_STOP1;
2214
2215 if (termio->c_cflag & PARENB) {
2216 if (termio->c_cflag & PARODD)
2217 mode |= MX_PARODD;
2218 else
2219 mode |= MX_PAREVEN;
2220 } else
2221 mode |= MX_PARNONE;
2222
2223 moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
2224
2225 cflag &= (CBAUD | CBAUDEX);
2226 #ifndef B921600
2227 #define B921600 (B460800+1)
2228 #endif
2229 switch (cflag) {
2230 case B921600:
2231 baud = 921600L;
2232 break;
2233 case B460800:
2234 baud = 460800L;
2235 break;
2236 case B230400:
2237 baud = 230400L;
2238 break;
2239 case B115200:
2240 baud = 115200L;
2241 break;
2242 case B57600:
2243 baud = 57600L;
2244 break;
2245 case B38400:
2246 baud = 38400L;
2247 break;
2248 case B19200:
2249 baud = 19200L;
2250 break;
2251 case B9600:
2252 baud = 9600L;
2253 break;
2254 case B4800:
2255 baud = 4800L;
2256 break;
2257 case B2400:
2258 baud = 2400L;
2259 break;
2260 case B1800:
2261 baud = 1800L;
2262 break;
2263 case B1200:
2264 baud = 1200L;
2265 break;
2266 case B600:
2267 baud = 600L;
2268 break;
2269 case B300:
2270 baud = 300L;
2271 break;
2272 case B200:
2273 baud = 200L;
2274 break;
2275 case B150:
2276 baud = 150L;
2277 break;
2278 case B134:
2279 baud = 134L;
2280 break;
2281 case B110:
2282 baud = 110L;
2283 break;
2284 case B75:
2285 baud = 75L;
2286 break;
2287 case B50:
2288 baud = 50L;
2289 break;
2290 default:
2291 baud = 0;
2292 }
2293 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
2294 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
2295 if (baud == 921600L)
2296 return (-1);
2297 }
2298 MoxaPortSetBaud(port, baud);
2299
2300 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
2301 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
2302 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
2303 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
2304 wait_finish(ofsAddr);
2305
2306 }
2307 return (0);
2308 }
2309
2310 int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState)
2311 {
2312
2313 if (!MoxaPortIsValid(port))
2314 return (-1);
2315 if (dtrState) {
2316 if (moxaLineCtrl[port] & DTR_ON)
2317 *dtrState = 1;
2318 else
2319 *dtrState = 0;
2320 }
2321 if (rtsState) {
2322 if (moxaLineCtrl[port] & RTS_ON)
2323 *rtsState = 1;
2324 else
2325 *rtsState = 0;
2326 }
2327 return (0);
2328 }
2329
2330 void MoxaPortLineCtrl(int port, int dtr, int rts)
2331 {
2332 void __iomem *ofsAddr;
2333 int mode;
2334
2335 ofsAddr = moxaTableAddr[port];
2336 mode = 0;
2337 if (dtr)
2338 mode |= DTR_ON;
2339 if (rts)
2340 mode |= RTS_ON;
2341 moxaLineCtrl[port] = mode;
2342 moxafunc(ofsAddr, FC_LineControl, mode);
2343 }
2344
2345 void MoxaPortFlowCtrl(int port, int rts, int cts, int txflow, int rxflow, int txany)
2346 {
2347 void __iomem *ofsAddr;
2348 int mode;
2349
2350 ofsAddr = moxaTableAddr[port];
2351 mode = 0;
2352 if (rts)
2353 mode |= RTS_FlowCtl;
2354 if (cts)
2355 mode |= CTS_FlowCtl;
2356 if (txflow)
2357 mode |= Tx_FlowCtl;
2358 if (rxflow)
2359 mode |= Rx_FlowCtl;
2360 if (txany)
2361 mode |= IXM_IXANY;
2362 moxafunc(ofsAddr, FC_SetFlowCtl, mode);
2363 }
2364
2365 int MoxaPortLineStatus(int port)
2366 {
2367 void __iomem *ofsAddr;
2368 int val;
2369
2370 ofsAddr = moxaTableAddr[port];
2371 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
2372 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
2373 moxafunc(ofsAddr, FC_LineStatus, 0);
2374 val = readw(ofsAddr + FuncArg);
2375 } else {
2376 val = readw(ofsAddr + FlagStat) >> 4;
2377 }
2378 val &= 0x0B;
2379 if (val & 8) {
2380 val |= 4;
2381 if ((moxaDCDState[port] & DCD_oldstate) == 0)
2382 moxaDCDState[port] = (DCD_oldstate | DCD_changed);
2383 } else {
2384 if (moxaDCDState[port] & DCD_oldstate)
2385 moxaDCDState[port] = DCD_changed;
2386 }
2387 val &= 7;
2388 return (val);
2389 }
2390
2391 int MoxaPortDCDChange(int port)
2392 {
2393 int n;
2394
2395 if (moxaChkPort[port] == 0)
2396 return (0);
2397 n = moxaDCDState[port];
2398 moxaDCDState[port] &= ~DCD_changed;
2399 n &= DCD_changed;
2400 return (n);
2401 }
2402
2403 int MoxaPortDCDON(int port)
2404 {
2405 int n;
2406
2407 if (moxaChkPort[port] == 0)
2408 return (0);
2409 if (moxaDCDState[port] & DCD_oldstate)
2410 n = 1;
2411 else
2412 n = 0;
2413 return (n);
2414 }
2415
2416
2417 /*
2418 int MoxaDumpMem(int port, unsigned char * buffer, int len)
2419 {
2420 int i;
2421 unsigned long baseAddr,ofsAddr,ofs;
2422
2423 baseAddr = moxaBaseAddr[port / MAX_PORTS_PER_BOARD];
2424 ofs = baseAddr + DynPage_addr + pageofs;
2425 if (len > 0x2000L)
2426 len = 0x2000L;
2427 for (i = 0; i < len; i++)
2428 buffer[i] = readb(ofs+i);
2429 }
2430 */
2431
2432
2433 int MoxaPortWriteData(int port, unsigned char * buffer, int len)
2434 {
2435 int c, total, i;
2436 ushort tail;
2437 int cnt;
2438 ushort head, tx_mask, spage, epage;
2439 ushort pageno, pageofs, bufhead;
2440 void __iomem *baseAddr, *ofsAddr, *ofs;
2441
2442 ofsAddr = moxaTableAddr[port];
2443 baseAddr = moxaBaseAddr[port / MAX_PORTS_PER_BOARD];
2444 tx_mask = readw(ofsAddr + TX_mask);
2445 spage = readw(ofsAddr + Page_txb);
2446 epage = readw(ofsAddr + EndPage_txb);
2447 tail = readw(ofsAddr + TXwptr);
2448 head = readw(ofsAddr + TXrptr);
2449 c = (head > tail) ? (head - tail - 1)
2450 : (head - tail + tx_mask);
2451 if (c > len)
2452 c = len;
2453 moxaLog.txcnt[port] += c;
2454 total = c;
2455 if (spage == epage) {
2456 bufhead = readw(ofsAddr + Ofs_txb);
2457 writew(spage, baseAddr + Control_reg);
2458 while (c > 0) {
2459 if (head > tail)
2460 len = head - tail - 1;
2461 else
2462 len = tx_mask + 1 - tail;
2463 len = (c > len) ? len : c;
2464 ofs = baseAddr + DynPage_addr + bufhead + tail;
2465 for (i = 0; i < len; i++)
2466 writeb(*buffer++, ofs + i);
2467 tail = (tail + len) & tx_mask;
2468 c -= len;
2469 }
2470 writew(tail, ofsAddr + TXwptr);
2471 } else {
2472 len = c;
2473 pageno = spage + (tail >> 13);
2474 pageofs = tail & Page_mask;
2475 do {
2476 cnt = Page_size - pageofs;
2477 if (cnt > c)
2478 cnt = c;
2479 c -= cnt;
2480 writeb(pageno, baseAddr + Control_reg);
2481 ofs = baseAddr + DynPage_addr + pageofs;
2482 for (i = 0; i < cnt; i++)
2483 writeb(*buffer++, ofs + i);
2484 if (c == 0) {
2485 writew((tail + len) & tx_mask, ofsAddr + TXwptr);
2486 break;
2487 }
2488 if (++pageno == epage)
2489 pageno = spage;
2490 pageofs = 0;
2491 } while (1);
2492 }
2493 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2494 return (total);
2495 }
2496
2497 int MoxaPortReadData(int port, struct tty_struct *tty)
2498 {
2499 register ushort head, pageofs;
2500 int i, count, cnt, len, total, remain;
2501 ushort tail, rx_mask, spage, epage;
2502 ushort pageno, bufhead;
2503 void __iomem *baseAddr, *ofsAddr, *ofs;
2504
2505 ofsAddr = moxaTableAddr[port];
2506 baseAddr = moxaBaseAddr[port / MAX_PORTS_PER_BOARD];
2507 head = readw(ofsAddr + RXrptr);
2508 tail = readw(ofsAddr + RXwptr);
2509 rx_mask = readw(ofsAddr + RX_mask);
2510 spage = readw(ofsAddr + Page_rxb);
2511 epage = readw(ofsAddr + EndPage_rxb);
2512 count = (tail >= head) ? (tail - head)
2513 : (tail - head + rx_mask + 1);
2514 if (count == 0)
2515 return 0;
2516
2517 total = count;
2518 remain = count - total;
2519 moxaLog.rxcnt[port] += total;
2520 count = total;
2521 if (spage == epage) {
2522 bufhead = readw(ofsAddr + Ofs_rxb);
2523 writew(spage, baseAddr + Control_reg);
2524 while (count > 0) {
2525 if (tail >= head)
2526 len = tail - head;
2527 else
2528 len = rx_mask + 1 - head;
2529 len = (count > len) ? len : count;
2530 ofs = baseAddr + DynPage_addr + bufhead + head;
2531 for (i = 0; i < len; i++)
2532 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
2533 head = (head + len) & rx_mask;
2534 count -= len;
2535 }
2536 writew(head, ofsAddr + RXrptr);
2537 } else {
2538 len = count;
2539 pageno = spage + (head >> 13);
2540 pageofs = head & Page_mask;
2541 do {
2542 cnt = Page_size - pageofs;
2543 if (cnt > count)
2544 cnt = count;
2545 count -= cnt;
2546 writew(pageno, baseAddr + Control_reg);
2547 ofs = baseAddr + DynPage_addr + pageofs;
2548 for (i = 0; i < cnt; i++)
2549 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
2550 if (count == 0) {
2551 writew((head + len) & rx_mask, ofsAddr + RXrptr);
2552 break;
2553 }
2554 if (++pageno == epage)
2555 pageno = spage;
2556 pageofs = 0;
2557 } while (1);
2558 }
2559 if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) {
2560 moxaLowWaterChk = 1;
2561 moxaLowChkFlag[port] = 1;
2562 }
2563 return (total);
2564 }
2565
2566
2567 int MoxaPortTxQueue(int port)
2568 {
2569 void __iomem *ofsAddr;
2570 ushort rptr, wptr, mask;
2571 int len;
2572
2573 ofsAddr = moxaTableAddr[port];
2574 rptr = readw(ofsAddr + TXrptr);
2575 wptr = readw(ofsAddr + TXwptr);
2576 mask = readw(ofsAddr + TX_mask);
2577 len = (wptr - rptr) & mask;
2578 return (len);
2579 }
2580
2581 int MoxaPortTxFree(int port)
2582 {
2583 void __iomem *ofsAddr;
2584 ushort rptr, wptr, mask;
2585 int len;
2586
2587 ofsAddr = moxaTableAddr[port];
2588 rptr = readw(ofsAddr + TXrptr);
2589 wptr = readw(ofsAddr + TXwptr);
2590 mask = readw(ofsAddr + TX_mask);
2591 len = mask - ((wptr - rptr) & mask);
2592 return (len);
2593 }
2594
2595 int MoxaPortRxQueue(int port)
2596 {
2597 void __iomem *ofsAddr;
2598 ushort rptr, wptr, mask;
2599 int len;
2600
2601 ofsAddr = moxaTableAddr[port];
2602 rptr = readw(ofsAddr + RXrptr);
2603 wptr = readw(ofsAddr + RXwptr);
2604 mask = readw(ofsAddr + RX_mask);
2605 len = (wptr - rptr) & mask;
2606 return (len);
2607 }
2608
2609
2610 void MoxaPortTxDisable(int port)
2611 {
2612 void __iomem *ofsAddr;
2613
2614 ofsAddr = moxaTableAddr[port];
2615 moxafunc(ofsAddr, FC_SetXoffState, Magic_code);
2616 }
2617
2618 void MoxaPortTxEnable(int port)
2619 {
2620 void __iomem *ofsAddr;
2621
2622 ofsAddr = moxaTableAddr[port];
2623 moxafunc(ofsAddr, FC_SetXonState, Magic_code);
2624 }
2625
2626
2627 int MoxaPortResetBrkCnt(int port)
2628 {
2629 ushort cnt;
2630 cnt = moxaBreakCnt[port];
2631 moxaBreakCnt[port] = 0;
2632 return (cnt);
2633 }
2634
2635
2636 void MoxaPortSendBreak(int port, int ms100)
2637 {
2638 void __iomem *ofsAddr;
2639
2640 ofsAddr = moxaTableAddr[port];
2641 if (ms100) {
2642 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
2643 moxadelay(ms100 * (HZ / 10));
2644 } else {
2645 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
2646 moxadelay(HZ / 4); /* 250 ms */
2647 }
2648 moxafunc(ofsAddr, FC_StopBreak, Magic_code);
2649 }
2650
2651 static int moxa_get_serial_info(struct moxa_str *info,
2652 struct serial_struct __user *retinfo)
2653 {
2654 struct serial_struct tmp;
2655
2656 memset(&tmp, 0, sizeof(tmp));
2657 tmp.type = info->type;
2658 tmp.line = info->port;
2659 tmp.port = 0;
2660 tmp.irq = 0;
2661 tmp.flags = info->asyncflags;
2662 tmp.baud_base = 921600;
2663 tmp.close_delay = info->close_delay;
2664 tmp.closing_wait = info->closing_wait;
2665 tmp.custom_divisor = 0;
2666 tmp.hub6 = 0;
2667 if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2668 return -EFAULT;
2669 return (0);
2670 }
2671
2672
2673 static int moxa_set_serial_info(struct moxa_str *info,
2674 struct serial_struct __user *new_info)
2675 {
2676 struct serial_struct new_serial;
2677
2678 if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2679 return -EFAULT;
2680
2681 if ((new_serial.irq != 0) ||
2682 (new_serial.port != 0) ||
2683 // (new_serial.type != info->type) ||
2684 (new_serial.custom_divisor != 0) ||
2685 (new_serial.baud_base != 921600))
2686 return (-EPERM);
2687
2688 if (!capable(CAP_SYS_ADMIN)) {
2689 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2690 (info->asyncflags & ~ASYNC_USR_MASK)))
2691 return (-EPERM);
2692 } else {
2693 info->close_delay = new_serial.close_delay * HZ / 100;
2694 info->closing_wait = new_serial.closing_wait * HZ / 100;
2695 }
2696
2697 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2698 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2699
2700 if (new_serial.type == PORT_16550A) {
2701 MoxaSetFifo(info->port, 1);
2702 } else {
2703 MoxaSetFifo(info->port, 0);
2704 }
2705
2706 info->type = new_serial.type;
2707 return (0);
2708 }
2709
2710
2711
2712 /*****************************************************************************
2713 * Static local functions: *
2714 *****************************************************************************/
2715 /*
2716 * moxadelay - delays a specified number ticks
2717 */
2718 static void moxadelay(int tick)
2719 {
2720 unsigned long st, et;
2721
2722 st = jiffies;
2723 et = st + tick;
2724 while (time_before(jiffies, et));
2725 }
2726
2727 static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
2728 {
2729
2730 writew(arg, ofsAddr + FuncArg);
2731 writew(cmd, ofsAddr + FuncCode);
2732 wait_finish(ofsAddr);
2733 }
2734
2735 static void wait_finish(void __iomem *ofsAddr)
2736 {
2737 unsigned long i, j;
2738
2739 i = jiffies;
2740 while (readw(ofsAddr + FuncCode) != 0) {
2741 j = jiffies;
2742 if ((j - i) > moxaFuncTout) {
2743 return;
2744 }
2745 }
2746 }
2747
2748 static void low_water_check(void __iomem *ofsAddr)
2749 {
2750 int len;
2751 ushort rptr, wptr, mask;
2752
2753 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2754 rptr = readw(ofsAddr + RXrptr);
2755 wptr = readw(ofsAddr + RXwptr);
2756 mask = readw(ofsAddr + RX_mask);
2757 len = (wptr - rptr) & mask;
2758 if (len <= Low_water)
2759 moxafunc(ofsAddr, FC_SendXon, 0);
2760 }
2761 }
2762
2763 static int moxaloadbios(int cardno, unsigned char __user *tmp, int len)
2764 {
2765 void __iomem *baseAddr;
2766 int i;
2767
2768 if(copy_from_user(moxaBuff, tmp, len))
2769 return -EFAULT;
2770 baseAddr = moxaBaseAddr[cardno];
2771 writeb(HW_reset, baseAddr + Control_reg); /* reset */
2772 moxadelay(1); /* delay 10 ms */
2773 for (i = 0; i < 4096; i++)
2774 writeb(0, baseAddr + i); /* clear fix page */
2775 for (i = 0; i < len; i++)
2776 writeb(moxaBuff[i], baseAddr + i); /* download BIOS */
2777 writeb(0, baseAddr + Control_reg); /* restart */
2778 return (0);
2779 }
2780
2781 static int moxafindcard(int cardno)
2782 {
2783 void __iomem *baseAddr;
2784 ushort tmp;
2785
2786 baseAddr = moxaBaseAddr[cardno];
2787 switch (moxa_boards[cardno].boardType) {
2788 case MOXA_BOARD_C218_ISA:
2789 case MOXA_BOARD_C218_PCI:
2790 if ((tmp = readw(baseAddr + C218_key)) != C218_KeyCode) {
2791 return (-1);
2792 }
2793 break;
2794 case MOXA_BOARD_CP204J:
2795 if ((tmp = readw(baseAddr + C218_key)) != CP204J_KeyCode) {
2796 return (-1);
2797 }
2798 break;
2799 default:
2800 if ((tmp = readw(baseAddr + C320_key)) != C320_KeyCode) {
2801 return (-1);
2802 }
2803 if ((tmp = readw(baseAddr + C320_status)) != STS_init) {
2804 return (-2);
2805 }
2806 }
2807 return (0);
2808 }
2809
2810 static int moxaload320b(int cardno, unsigned char __user *tmp, int len)
2811 {
2812 void __iomem *baseAddr;
2813 int i;
2814
2815 if(len > sizeof(moxaBuff))
2816 return -EINVAL;
2817 if(copy_from_user(moxaBuff, tmp, len))
2818 return -EFAULT;
2819 baseAddr = moxaBaseAddr[cardno];
2820 writew(len - 7168 - 2, baseAddr + C320bapi_len);
2821 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
2822 for (i = 0; i < 7168; i++)
2823 writeb(moxaBuff[i], baseAddr + DynPage_addr + i);
2824 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
2825 for (i = 0; i < (len - 7168); i++)
2826 writeb(moxaBuff[i + 7168], baseAddr + DynPage_addr + i);
2827 return (0);
2828 }
2829
2830 static int moxaloadcode(int cardno, unsigned char __user *tmp, int len)
2831 {
2832 void __iomem *baseAddr, *ofsAddr;
2833 int retval, port, i;
2834
2835 if(copy_from_user(moxaBuff, tmp, len))
2836 return -EFAULT;
2837 baseAddr = moxaBaseAddr[cardno];
2838 switch (moxa_boards[cardno].boardType) {
2839 case MOXA_BOARD_C218_ISA:
2840 case MOXA_BOARD_C218_PCI:
2841 case MOXA_BOARD_CP204J:
2842 retval = moxaloadc218(cardno, baseAddr, len);
2843 if (retval)
2844 return (retval);
2845 port = cardno * MAX_PORTS_PER_BOARD;
2846 for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
2847 moxaChkPort[port] = 1;
2848 moxaCurBaud[port] = 9600L;
2849 moxaDCDState[port] = 0;
2850 moxaTableAddr[port] = baseAddr + Extern_table + Extern_size * i;
2851 ofsAddr = moxaTableAddr[port];
2852 writew(C218rx_mask, ofsAddr + RX_mask);
2853 writew(C218tx_mask, ofsAddr + TX_mask);
2854 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
2855 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
2856
2857 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
2858 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
2859
2860 }
2861 break;
2862 default:
2863 retval = moxaloadc320(cardno, baseAddr, len,
2864 &moxa_boards[cardno].numPorts);
2865 if (retval)
2866 return (retval);
2867 port = cardno * MAX_PORTS_PER_BOARD;
2868 for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
2869 moxaChkPort[port] = 1;
2870 moxaCurBaud[port] = 9600L;
2871 moxaDCDState[port] = 0;
2872 moxaTableAddr[port] = baseAddr + Extern_table + Extern_size * i;
2873 ofsAddr = moxaTableAddr[port];
2874 if (moxa_boards[cardno].numPorts == 8) {
2875 writew(C320p8rx_mask, ofsAddr + RX_mask);
2876 writew(C320p8tx_mask, ofsAddr + TX_mask);
2877 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
2878 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
2879 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
2880 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
2881
2882 } else if (moxa_boards[cardno].numPorts == 16) {
2883 writew(C320p16rx_mask, ofsAddr + RX_mask);
2884 writew(C320p16tx_mask, ofsAddr + TX_mask);
2885 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
2886 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
2887 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
2888 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
2889
2890 } else if (moxa_boards[cardno].numPorts == 24) {
2891 writew(C320p24rx_mask, ofsAddr + RX_mask);
2892 writew(C320p24tx_mask, ofsAddr + TX_mask);
2893 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
2894 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
2895 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
2896 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
2897 } else if (moxa_boards[cardno].numPorts == 32) {
2898 writew(C320p32rx_mask, ofsAddr + RX_mask);
2899 writew(C320p32tx_mask, ofsAddr + TX_mask);
2900 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
2901 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
2902 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
2903 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
2904 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
2905 }
2906 }
2907 break;
2908 }
2909 loadstat[cardno] = 1;
2910 return (0);
2911 }
2912
2913 static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
2914 {
2915 char retry;
2916 int i, j, len1, len2;
2917 ushort usum, *ptr, keycode;
2918
2919 if (moxa_boards[cardno].boardType == MOXA_BOARD_CP204J)
2920 keycode = CP204J_KeyCode;
2921 else
2922 keycode = C218_KeyCode;
2923 usum = 0;
2924 len1 = len >> 1;
2925 ptr = (ushort *) moxaBuff;
2926 for (i = 0; i < len1; i++)
2927 usum += le16_to_cpu(*(ptr + i));
2928 retry = 0;
2929 do {
2930 len1 = len >> 1;
2931 j = 0;
2932 while (len1) {
2933 len2 = (len1 > 2048) ? 2048 : len1;
2934 len1 -= len2;
2935 for (i = 0; i < len2 << 1; i++)
2936 writeb(moxaBuff[i + j], baseAddr + C218_LoadBuf + i);
2937 j += i;
2938
2939 writew(len2, baseAddr + C218DLoad_len);
2940 writew(0, baseAddr + C218_key);
2941 for (i = 0; i < 100; i++) {
2942 if (readw(baseAddr + C218_key) == keycode)
2943 break;
2944 moxadelay(1); /* delay 10 ms */
2945 }
2946 if (readw(baseAddr + C218_key) != keycode) {
2947 return (-1);
2948 }
2949 }
2950 writew(0, baseAddr + C218DLoad_len);
2951 writew(usum, baseAddr + C218check_sum);
2952 writew(0, baseAddr + C218_key);
2953 for (i = 0; i < 100; i++) {
2954 if (readw(baseAddr + C218_key) == keycode)
2955 break;
2956 moxadelay(1); /* delay 10 ms */
2957 }
2958 retry++;
2959 } while ((readb(baseAddr + C218chksum_ok) != 1) && (retry < 3));
2960 if (readb(baseAddr + C218chksum_ok) != 1) {
2961 return (-1);
2962 }
2963 writew(0, baseAddr + C218_key);
2964 for (i = 0; i < 100; i++) {
2965 if (readw(baseAddr + Magic_no) == Magic_code)
2966 break;
2967 moxadelay(1); /* delay 10 ms */
2968 }
2969 if (readw(baseAddr + Magic_no) != Magic_code) {
2970 return (-1);
2971 }
2972 writew(1, baseAddr + Disable_IRQ);
2973 writew(0, baseAddr + Magic_no);
2974 for (i = 0; i < 100; i++) {
2975 if (readw(baseAddr + Magic_no) == Magic_code)
2976 break;
2977 moxadelay(1); /* delay 10 ms */
2978 }
2979 if (readw(baseAddr + Magic_no) != Magic_code) {
2980 return (-1);
2981 }
2982 moxaCard = 1;
2983 moxaIntNdx[cardno] = baseAddr + IRQindex;
2984 moxaIntPend[cardno] = baseAddr + IRQpending;
2985 moxaIntTable[cardno] = baseAddr + IRQtable;
2986 return (0);
2987 }
2988
2989 static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPorts)
2990 {
2991 ushort usum;
2992 int i, j, wlen, len2, retry;
2993 ushort *uptr;
2994
2995 usum = 0;
2996 wlen = len >> 1;
2997 uptr = (ushort *) moxaBuff;
2998 for (i = 0; i < wlen; i++)
2999 usum += le16_to_cpu(uptr[i]);
3000 retry = 0;
3001 j = 0;
3002 do {
3003 while (wlen) {
3004 if (wlen > 2048)
3005 len2 = 2048;
3006 else
3007 len2 = wlen;
3008 wlen -= len2;
3009 len2 <<= 1;
3010 for (i = 0; i < len2; i++)
3011 writeb(moxaBuff[j + i], baseAddr + C320_LoadBuf + i);
3012 len2 >>= 1;
3013 j += i;
3014 writew(len2, baseAddr + C320DLoad_len);
3015 writew(0, baseAddr + C320_key);
3016 for (i = 0; i < 10; i++) {
3017 if (readw(baseAddr + C320_key) == C320_KeyCode)
3018 break;
3019 moxadelay(1);
3020 }
3021 if (readw(baseAddr + C320_key) != C320_KeyCode)
3022 return (-1);
3023 }
3024 writew(0, baseAddr + C320DLoad_len);
3025 writew(usum, baseAddr + C320check_sum);
3026 writew(0, baseAddr + C320_key);
3027 for (i = 0; i < 10; i++) {
3028 if (readw(baseAddr + C320_key) == C320_KeyCode)
3029 break;
3030 moxadelay(1);
3031 }
3032 retry++;
3033 } while ((readb(baseAddr + C320chksum_ok) != 1) && (retry < 3));
3034 if (readb(baseAddr + C320chksum_ok) != 1)
3035 return (-1);
3036 writew(0, baseAddr + C320_key);
3037 for (i = 0; i < 600; i++) {
3038 if (readw(baseAddr + Magic_no) == Magic_code)
3039 break;
3040 moxadelay(1);
3041 }
3042 if (readw(baseAddr + Magic_no) != Magic_code)
3043 return (-100);
3044
3045 if (moxa_boards[cardno].busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
3046 writew(0x3800, baseAddr + TMS320_PORT1);
3047 writew(0x3900, baseAddr + TMS320_PORT2);
3048 writew(28499, baseAddr + TMS320_CLOCK);
3049 } else {
3050 writew(0x3200, baseAddr + TMS320_PORT1);
3051 writew(0x3400, baseAddr + TMS320_PORT2);
3052 writew(19999, baseAddr + TMS320_CLOCK);
3053 }
3054 writew(1, baseAddr + Disable_IRQ);
3055 writew(0, baseAddr + Magic_no);
3056 for (i = 0; i < 500; i++) {
3057 if (readw(baseAddr + Magic_no) == Magic_code)
3058 break;
3059 moxadelay(1);
3060 }
3061 if (readw(baseAddr + Magic_no) != Magic_code)
3062 return (-102);
3063
3064 j = readw(baseAddr + Module_cnt);
3065 if (j <= 0)
3066 return (-101);
3067 *numPorts = j * 8;
3068 writew(j, baseAddr + Module_no);
3069 writew(0, baseAddr + Magic_no);
3070 for (i = 0; i < 600; i++) {
3071 if (readw(baseAddr + Magic_no) == Magic_code)
3072 break;
3073 moxadelay(1);
3074 }
3075 if (readw(baseAddr + Magic_no) != Magic_code)
3076 return (-102);
3077 moxaCard = 1;
3078 moxaIntNdx[cardno] = baseAddr + IRQindex;
3079 moxaIntPend[cardno] = baseAddr + IRQpending;
3080 moxaIntTable[cardno] = baseAddr + IRQtable;
3081 return (0);
3082 }
3083
3084 #if 0
3085 long MoxaPortGetCurBaud(int port)
3086 {
3087
3088 if (moxaChkPort[port] == 0)
3089 return (0);
3090 return (moxaCurBaud[port]);
3091 }
3092 #endif /* 0 */
3093
3094 static void MoxaSetFifo(int port, int enable)
3095 {
3096 void __iomem *ofsAddr = moxaTableAddr[port];
3097
3098 if (!enable) {
3099 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
3100 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
3101 } else {
3102 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
3103 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
3104 }
3105 }
3106
3107 #if 0
3108 int MoxaPortSetMode(int port, int databits, int stopbits, int parity)
3109 {
3110 void __iomem *ofsAddr;
3111 int val;
3112
3113 val = 0;
3114 switch (databits) {
3115 case 5:
3116 val |= 0;
3117 break;
3118 case 6:
3119 val |= 1;
3120 break;
3121 case 7:
3122 val |= 2;
3123 break;
3124 case 8:
3125 val |= 3;
3126 break;
3127 default:
3128 return (-1);
3129 }
3130 switch (stopbits) {
3131 case 0:
3132 val |= 0;
3133 break; /* stop bits 1.5 */
3134 case 1:
3135 val |= 0;
3136 break;
3137 case 2:
3138 val |= 4;
3139 break;
3140 default:
3141 return (-1);
3142 }
3143 switch (parity) {
3144 case 0:
3145 val |= 0x00;
3146 break; /* None */
3147 case 1:
3148 val |= 0x08;
3149 break; /* Odd */
3150 case 2:
3151 val |= 0x18;
3152 break; /* Even */
3153 case 3:
3154 val |= 0x28;
3155 break; /* Mark */
3156 case 4:
3157 val |= 0x38;
3158 break; /* Space */
3159 default:
3160 return (-1);
3161 }
3162 ofsAddr = moxaTableAddr[port];
3163 moxafunc(ofsAddr, FC_SetMode, val);
3164 return (0);
3165 }
3166
3167 int MoxaPortTxBufSize(int port)
3168 {
3169 void __iomem *ofsAddr;
3170 int size;
3171
3172 ofsAddr = moxaTableAddr[port];
3173 size = readw(ofsAddr + TX_mask);
3174 return (size);
3175 }
3176
3177 int MoxaPortRxBufSize(int port)
3178 {
3179 void __iomem *ofsAddr;
3180 int size;
3181
3182 ofsAddr = moxaTableAddr[port];
3183 size = readw(ofsAddr + RX_mask);
3184 return (size);
3185 }
3186
3187 int MoxaPortRxFree(int port)
3188 {
3189 void __iomem *ofsAddr;
3190 ushort rptr, wptr, mask;
3191 int len;
3192
3193 ofsAddr = moxaTableAddr[port];
3194 rptr = readw(ofsAddr + RXrptr);
3195 wptr = readw(ofsAddr + RXwptr);
3196 mask = readw(ofsAddr + RX_mask);
3197 len = mask - ((wptr - rptr) & mask);
3198 return (len);
3199 }
3200 int MoxaPortGetBrkCnt(int port)
3201 {
3202 return (moxaBreakCnt[port]);
3203 }
3204
3205 void MoxaPortSetXonXoff(int port, int xonValue, int xoffValue)
3206 {
3207 void __iomem *ofsAddr;
3208
3209 ofsAddr = moxaTableAddr[port];
3210 writew(xonValue, ofsAddr + FuncArg);
3211 writew(xoffValue, ofsAddr + FuncArg1);
3212 writew(FC_SetXonXoff, ofsAddr + FuncCode);
3213 wait_finish(ofsAddr);
3214 }
3215
3216 int MoxaPortIsTxHold(int port)
3217 {
3218 void __iomem *ofsAddr;
3219 int val;
3220
3221 ofsAddr = moxaTableAddr[port];
3222 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
3223 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
3224 moxafunc(ofsAddr, FC_GetCCSR, 0);
3225 val = readw(ofsAddr + FuncArg);
3226 if (val & 0x04)
3227 return (1);
3228 } else {
3229 if (readw(ofsAddr + FlagStat) & Tx_flowOff)
3230 return (1);
3231 }
3232 return (0);
3233 }
3234 #endif
linux v2.6.22.y-op