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tty: moxa: remove #ifdef MODULE completely.
[linux-2.6.git] / drivers / char / moxa.c
blob49a1fc2ec6f23c5acd571eb8eef3a5519f837499
1 /*****************************************************************************/
2 /*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
7 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 */
16
17 /*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
24 #include <linux/module.h>
25 #include <linux/types.h>
26 #include <linux/mm.h>
27 #include <linux/ioport.h>
28 #include <linux/errno.h>
29 #include <linux/firmware.h>
30 #include <linux/signal.h>
31 #include <linux/sched.h>
32 #include <linux/timer.h>
33 #include <linux/interrupt.h>
34 #include <linux/tty.h>
35 #include <linux/tty_flip.h>
36 #include <linux/major.h>
37 #include <linux/string.h>
38 #include <linux/fcntl.h>
39 #include <linux/ptrace.h>
40 #include <linux/serial.h>
41 #include <linux/tty_driver.h>
42 #include <linux/delay.h>
43 #include <linux/pci.h>
44 #include <linux/init.h>
45 #include <linux/bitops.h>
46
47 #include <asm/system.h>
48 #include <asm/io.h>
49 #include <asm/uaccess.h>
50
51 #include "moxa.h"
52
53 #define MOXA_VERSION "6.0k"
54
55 #define MOXA_FW_HDRLEN 32
56
57 #define MOXAMAJOR 172
58
59 #define MAX_BOARDS 4 /* Don't change this value */
60 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
61 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
62
63 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
64 (brd)->boardType == MOXA_BOARD_C320_PCI)
65
66 /*
67 * Define the Moxa PCI vendor and device IDs.
68 */
69 #define MOXA_BUS_TYPE_ISA 0
70 #define MOXA_BUS_TYPE_PCI 1
71
72 enum {
73 MOXA_BOARD_C218_PCI = 1,
74 MOXA_BOARD_C218_ISA,
75 MOXA_BOARD_C320_PCI,
76 MOXA_BOARD_C320_ISA,
77 MOXA_BOARD_CP204J,
78 };
79
80 static char *moxa_brdname[] =
81 {
82 "C218 Turbo PCI series",
83 "C218 Turbo ISA series",
84 "C320 Turbo PCI series",
85 "C320 Turbo ISA series",
86 "CP-204J series",
87 };
88
89 #ifdef CONFIG_PCI
90 static struct pci_device_id moxa_pcibrds[] = {
91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
92 .driver_data = MOXA_BOARD_C218_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
94 .driver_data = MOXA_BOARD_C320_PCI },
95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
96 .driver_data = MOXA_BOARD_CP204J },
97 { 0 }
98 };
99 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
100 #endif /* CONFIG_PCI */
101
102 struct moxa_port;
103
104 static struct moxa_board_conf {
105 int boardType;
106 int numPorts;
107 int busType;
108
109 unsigned int ready;
110
111 struct moxa_port *ports;
112
113 void __iomem *basemem;
114 void __iomem *intNdx;
115 void __iomem *intPend;
116 void __iomem *intTable;
117 } moxa_boards[MAX_BOARDS];
118
119 struct mxser_mstatus {
120 tcflag_t cflag;
121 int cts;
122 int dsr;
123 int ri;
124 int dcd;
125 };
126
127 struct moxaq_str {
128 int inq;
129 int outq;
130 };
131
132 struct moxa_port {
133 struct tty_port port;
134 struct moxa_board_conf *board;
135 void __iomem *tableAddr;
136
137 int type;
138 int cflag;
139 unsigned long statusflags;
140
141 u8 DCDState; /* Protected by the port lock */
142 u8 lineCtrl;
143 u8 lowChkFlag;
144 };
145
146 struct mon_str {
147 int tick;
148 int rxcnt[MAX_PORTS];
149 int txcnt[MAX_PORTS];
150 };
151
152 /* statusflags */
153 #define TXSTOPPED 1
154 #define LOWWAIT 2
155 #define EMPTYWAIT 3
156
157 #define SERIAL_DO_RESTART
158
159 #define WAKEUP_CHARS 256
160
161 static int ttymajor = MOXAMAJOR;
162 static struct mon_str moxaLog;
163 static unsigned int moxaFuncTout = HZ / 2;
164 static unsigned int moxaLowWaterChk;
165 static DEFINE_MUTEX(moxa_openlock);
166 static DEFINE_SPINLOCK(moxa_lock);
167
168 static unsigned long baseaddr[MAX_BOARDS];
169 static unsigned int type[MAX_BOARDS];
170 static unsigned int numports[MAX_BOARDS];
171
172 MODULE_AUTHOR("William Chen");
173 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
174 MODULE_LICENSE("GPL");
175
176 module_param_array(type, uint, NULL, 0);
177 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
178 module_param_array(baseaddr, ulong, NULL, 0);
179 MODULE_PARM_DESC(baseaddr, "base address");
180 module_param_array(numports, uint, NULL, 0);
181 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
182
183 module_param(ttymajor, int, 0);
184
185 /*
186 * static functions:
187 */
188 static int moxa_open(struct tty_struct *, struct file *);
189 static void moxa_close(struct tty_struct *, struct file *);
190 static int moxa_write(struct tty_struct *, const unsigned char *, int);
191 static int moxa_write_room(struct tty_struct *);
192 static void moxa_flush_buffer(struct tty_struct *);
193 static int moxa_chars_in_buffer(struct tty_struct *);
194 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
195 static void moxa_stop(struct tty_struct *);
196 static void moxa_start(struct tty_struct *);
197 static void moxa_hangup(struct tty_struct *);
198 static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
199 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
200 unsigned int set, unsigned int clear);
201 static void moxa_poll(unsigned long);
202 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
203 static void moxa_shutdown(struct tty_port *);
204 static int moxa_carrier_raised(struct tty_port *);
205 static void moxa_dtr_rts(struct tty_port *, int);
206 /*
207 * moxa board interface functions:
208 */
209 static void MoxaPortEnable(struct moxa_port *);
210 static void MoxaPortDisable(struct moxa_port *);
211 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
212 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
213 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
214 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
215 static int MoxaPortLineStatus(struct moxa_port *);
216 static void MoxaPortFlushData(struct moxa_port *, int);
217 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
218 static int MoxaPortReadData(struct moxa_port *);
219 static int MoxaPortTxQueue(struct moxa_port *);
220 static int MoxaPortRxQueue(struct moxa_port *);
221 static int MoxaPortTxFree(struct moxa_port *);
222 static void MoxaPortTxDisable(struct moxa_port *);
223 static void MoxaPortTxEnable(struct moxa_port *);
224 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
225 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
226 static void MoxaSetFifo(struct moxa_port *port, int enable);
227
228 /*
229 * I/O functions
230 */
231
232 static DEFINE_SPINLOCK(moxafunc_lock);
233
234 static void moxa_wait_finish(void __iomem *ofsAddr)
235 {
236 unsigned long end = jiffies + moxaFuncTout;
237
238 while (readw(ofsAddr + FuncCode) != 0)
239 if (time_after(jiffies, end))
240 return;
241 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
242 printk(KERN_WARNING "moxa function expired\n");
243 }
244
245 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
246 {
247 unsigned long flags;
248 spin_lock_irqsave(&moxafunc_lock, flags);
249 writew(arg, ofsAddr + FuncArg);
250 writew(cmd, ofsAddr + FuncCode);
251 moxa_wait_finish(ofsAddr);
252 spin_unlock_irqrestore(&moxafunc_lock, flags);
253 }
254
255 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
256 {
257 unsigned long flags;
258 u16 ret;
259 spin_lock_irqsave(&moxafunc_lock, flags);
260 writew(arg, ofsAddr + FuncArg);
261 writew(cmd, ofsAddr + FuncCode);
262 moxa_wait_finish(ofsAddr);
263 ret = readw(ofsAddr + FuncArg);
264 spin_unlock_irqrestore(&moxafunc_lock, flags);
265 return ret;
266 }
267
268 static void moxa_low_water_check(void __iomem *ofsAddr)
269 {
270 u16 rptr, wptr, mask, len;
271
272 if (readb(ofsAddr + FlagStat) & Xoff_state) {
273 rptr = readw(ofsAddr + RXrptr);
274 wptr = readw(ofsAddr + RXwptr);
275 mask = readw(ofsAddr + RX_mask);
276 len = (wptr - rptr) & mask;
277 if (len <= Low_water)
278 moxafunc(ofsAddr, FC_SendXon, 0);
279 }
280 }
281
282 /*
283 * TTY operations
284 */
285
286 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
287 unsigned int cmd, unsigned long arg)
288 {
289 struct moxa_port *ch = tty->driver_data;
290 void __user *argp = (void __user *)arg;
291 int status, ret = 0;
292
293 if (tty->index == MAX_PORTS) {
294 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
295 cmd != MOXA_GETMSTATUS)
296 return -EINVAL;
297 } else if (!ch)
298 return -ENODEV;
299
300 switch (cmd) {
301 case MOXA_GETDATACOUNT:
302 moxaLog.tick = jiffies;
303 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
304 ret = -EFAULT;
305 break;
306 case MOXA_FLUSH_QUEUE:
307 MoxaPortFlushData(ch, arg);
308 break;
309 case MOXA_GET_IOQUEUE: {
310 struct moxaq_str __user *argm = argp;
311 struct moxaq_str tmp;
312 struct moxa_port *p;
313 unsigned int i, j;
314
315 for (i = 0; i < MAX_BOARDS; i++) {
316 p = moxa_boards[i].ports;
317 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
318 memset(&tmp, 0, sizeof(tmp));
319 spin_lock_bh(&moxa_lock);
320 if (moxa_boards[i].ready) {
321 tmp.inq = MoxaPortRxQueue(p);
322 tmp.outq = MoxaPortTxQueue(p);
323 }
324 spin_unlock_bh(&moxa_lock);
325 if (copy_to_user(argm, &tmp, sizeof(tmp)))
326 return -EFAULT;
327 }
328 }
329 break;
330 } case MOXA_GET_OQUEUE:
331 status = MoxaPortTxQueue(ch);
332 ret = put_user(status, (unsigned long __user *)argp);
333 break;
334 case MOXA_GET_IQUEUE:
335 status = MoxaPortRxQueue(ch);
336 ret = put_user(status, (unsigned long __user *)argp);
337 break;
338 case MOXA_GETMSTATUS: {
339 struct mxser_mstatus __user *argm = argp;
340 struct mxser_mstatus tmp;
341 struct moxa_port *p;
342 unsigned int i, j;
343
344 for (i = 0; i < MAX_BOARDS; i++) {
345 p = moxa_boards[i].ports;
346 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
347 struct tty_struct *ttyp;
348 memset(&tmp, 0, sizeof(tmp));
349 spin_lock_bh(&moxa_lock);
350 if (!moxa_boards[i].ready) {
351 spin_unlock_bh(&moxa_lock);
352 goto copy;
353 }
354
355 status = MoxaPortLineStatus(p);
356 spin_unlock_bh(&moxa_lock);
357
358 if (status & 1)
359 tmp.cts = 1;
360 if (status & 2)
361 tmp.dsr = 1;
362 if (status & 4)
363 tmp.dcd = 1;
364
365 ttyp = tty_port_tty_get(&p->port);
366 if (!ttyp || !ttyp->termios)
367 tmp.cflag = p->cflag;
368 else
369 tmp.cflag = ttyp->termios->c_cflag;
370 tty_kref_put(tty);
371 copy:
372 if (copy_to_user(argm, &tmp, sizeof(tmp)))
373 return -EFAULT;
374 }
375 }
376 break;
377 }
378 case TIOCGSERIAL:
379 mutex_lock(&ch->port.mutex);
380 ret = moxa_get_serial_info(ch, argp);
381 mutex_unlock(&ch->port.mutex);
382 break;
383 case TIOCSSERIAL:
384 mutex_lock(&ch->port.mutex);
385 ret = moxa_set_serial_info(ch, argp);
386 mutex_unlock(&ch->port.mutex);
387 break;
388 default:
389 ret = -ENOIOCTLCMD;
390 }
391 return ret;
392 }
393
394 static int moxa_break_ctl(struct tty_struct *tty, int state)
395 {
396 struct moxa_port *port = tty->driver_data;
397
398 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
399 Magic_code);
400 return 0;
401 }
402
403 static const struct tty_operations moxa_ops = {
404 .open = moxa_open,
405 .close = moxa_close,
406 .write = moxa_write,
407 .write_room = moxa_write_room,
408 .flush_buffer = moxa_flush_buffer,
409 .chars_in_buffer = moxa_chars_in_buffer,
410 .ioctl = moxa_ioctl,
411 .set_termios = moxa_set_termios,
412 .stop = moxa_stop,
413 .start = moxa_start,
414 .hangup = moxa_hangup,
415 .break_ctl = moxa_break_ctl,
416 .tiocmget = moxa_tiocmget,
417 .tiocmset = moxa_tiocmset,
418 };
419
420 static const struct tty_port_operations moxa_port_ops = {
421 .carrier_raised = moxa_carrier_raised,
422 .dtr_rts = moxa_dtr_rts,
423 .shutdown = moxa_shutdown,
424 };
425
426 static struct tty_driver *moxaDriver;
427 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
428
429 /*
430 * HW init
431 */
432
433 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
434 {
435 switch (brd->boardType) {
436 case MOXA_BOARD_C218_ISA:
437 case MOXA_BOARD_C218_PCI:
438 if (model != 1)
439 goto err;
440 break;
441 case MOXA_BOARD_CP204J:
442 if (model != 3)
443 goto err;
444 break;
445 default:
446 if (model != 2)
447 goto err;
448 break;
449 }
450 return 0;
451 err:
452 return -EINVAL;
453 }
454
455 static int moxa_check_fw(const void *ptr)
456 {
457 const __le16 *lptr = ptr;
458
459 if (*lptr != cpu_to_le16(0x7980))
460 return -EINVAL;
461
462 return 0;
463 }
464
465 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
466 size_t len)
467 {
468 void __iomem *baseAddr = brd->basemem;
469 u16 tmp;
470
471 writeb(HW_reset, baseAddr + Control_reg); /* reset */
472 msleep(10);
473 memset_io(baseAddr, 0, 4096);
474 memcpy_toio(baseAddr, buf, len); /* download BIOS */
475 writeb(0, baseAddr + Control_reg); /* restart */
476
477 msleep(2000);
478
479 switch (brd->boardType) {
480 case MOXA_BOARD_C218_ISA:
481 case MOXA_BOARD_C218_PCI:
482 tmp = readw(baseAddr + C218_key);
483 if (tmp != C218_KeyCode)
484 goto err;
485 break;
486 case MOXA_BOARD_CP204J:
487 tmp = readw(baseAddr + C218_key);
488 if (tmp != CP204J_KeyCode)
489 goto err;
490 break;
491 default:
492 tmp = readw(baseAddr + C320_key);
493 if (tmp != C320_KeyCode)
494 goto err;
495 tmp = readw(baseAddr + C320_status);
496 if (tmp != STS_init) {
497 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
498 "module not found\n");
499 return -EIO;
500 }
501 break;
502 }
503
504 return 0;
505 err:
506 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
507 return -EIO;
508 }
509
510 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
511 size_t len)
512 {
513 void __iomem *baseAddr = brd->basemem;
514
515 if (len < 7168) {
516 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
517 return -EINVAL;
518 }
519
520 writew(len - 7168 - 2, baseAddr + C320bapi_len);
521 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
522 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
523 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
524 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
525
526 return 0;
527 }
528
529 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
530 size_t len)
531 {
532 void __iomem *baseAddr = brd->basemem;
533 const __le16 *uptr = ptr;
534 size_t wlen, len2, j;
535 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
536 unsigned int i, retry;
537 u16 usum, keycode;
538
539 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
540 C218_KeyCode;
541
542 switch (brd->boardType) {
543 case MOXA_BOARD_CP204J:
544 case MOXA_BOARD_C218_ISA:
545 case MOXA_BOARD_C218_PCI:
546 key = C218_key;
547 loadbuf = C218_LoadBuf;
548 loadlen = C218DLoad_len;
549 checksum = C218check_sum;
550 checksum_ok = C218chksum_ok;
551 break;
552 default:
553 key = C320_key;
554 keycode = C320_KeyCode;
555 loadbuf = C320_LoadBuf;
556 loadlen = C320DLoad_len;
557 checksum = C320check_sum;
558 checksum_ok = C320chksum_ok;
559 break;
560 }
561
562 usum = 0;
563 wlen = len >> 1;
564 for (i = 0; i < wlen; i++)
565 usum += le16_to_cpu(uptr[i]);
566 retry = 0;
567 do {
568 wlen = len >> 1;
569 j = 0;
570 while (wlen) {
571 len2 = (wlen > 2048) ? 2048 : wlen;
572 wlen -= len2;
573 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
574 j += len2 << 1;
575
576 writew(len2, baseAddr + loadlen);
577 writew(0, baseAddr + key);
578 for (i = 0; i < 100; i++) {
579 if (readw(baseAddr + key) == keycode)
580 break;
581 msleep(10);
582 }
583 if (readw(baseAddr + key) != keycode)
584 return -EIO;
585 }
586 writew(0, baseAddr + loadlen);
587 writew(usum, baseAddr + checksum);
588 writew(0, baseAddr + key);
589 for (i = 0; i < 100; i++) {
590 if (readw(baseAddr + key) == keycode)
591 break;
592 msleep(10);
593 }
594 retry++;
595 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
596 if (readb(baseAddr + checksum_ok) != 1)
597 return -EIO;
598
599 writew(0, baseAddr + key);
600 for (i = 0; i < 600; i++) {
601 if (readw(baseAddr + Magic_no) == Magic_code)
602 break;
603 msleep(10);
604 }
605 if (readw(baseAddr + Magic_no) != Magic_code)
606 return -EIO;
607
608 if (MOXA_IS_320(brd)) {
609 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
610 writew(0x3800, baseAddr + TMS320_PORT1);
611 writew(0x3900, baseAddr + TMS320_PORT2);
612 writew(28499, baseAddr + TMS320_CLOCK);
613 } else {
614 writew(0x3200, baseAddr + TMS320_PORT1);
615 writew(0x3400, baseAddr + TMS320_PORT2);
616 writew(19999, baseAddr + TMS320_CLOCK);
617 }
618 }
619 writew(1, baseAddr + Disable_IRQ);
620 writew(0, baseAddr + Magic_no);
621 for (i = 0; i < 500; i++) {
622 if (readw(baseAddr + Magic_no) == Magic_code)
623 break;
624 msleep(10);
625 }
626 if (readw(baseAddr + Magic_no) != Magic_code)
627 return -EIO;
628
629 if (MOXA_IS_320(brd)) {
630 j = readw(baseAddr + Module_cnt);
631 if (j <= 0)
632 return -EIO;
633 brd->numPorts = j * 8;
634 writew(j, baseAddr + Module_no);
635 writew(0, baseAddr + Magic_no);
636 for (i = 0; i < 600; i++) {
637 if (readw(baseAddr + Magic_no) == Magic_code)
638 break;
639 msleep(10);
640 }
641 if (readw(baseAddr + Magic_no) != Magic_code)
642 return -EIO;
643 }
644 brd->intNdx = baseAddr + IRQindex;
645 brd->intPend = baseAddr + IRQpending;
646 brd->intTable = baseAddr + IRQtable;
647
648 return 0;
649 }
650
651 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
652 size_t len)
653 {
654 void __iomem *ofsAddr, *baseAddr = brd->basemem;
655 struct moxa_port *port;
656 int retval, i;
657
658 if (len % 2) {
659 printk(KERN_ERR "MOXA: bios length is not even\n");
660 return -EINVAL;
661 }
662
663 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
664 if (retval)
665 return retval;
666
667 switch (brd->boardType) {
668 case MOXA_BOARD_C218_ISA:
669 case MOXA_BOARD_C218_PCI:
670 case MOXA_BOARD_CP204J:
671 port = brd->ports;
672 for (i = 0; i < brd->numPorts; i++, port++) {
673 port->board = brd;
674 port->DCDState = 0;
675 port->tableAddr = baseAddr + Extern_table +
676 Extern_size * i;
677 ofsAddr = port->tableAddr;
678 writew(C218rx_mask, ofsAddr + RX_mask);
679 writew(C218tx_mask, ofsAddr + TX_mask);
680 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
681 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
682
683 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
684 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
685
686 }
687 break;
688 default:
689 port = brd->ports;
690 for (i = 0; i < brd->numPorts; i++, port++) {
691 port->board = brd;
692 port->DCDState = 0;
693 port->tableAddr = baseAddr + Extern_table +
694 Extern_size * i;
695 ofsAddr = port->tableAddr;
696 switch (brd->numPorts) {
697 case 8:
698 writew(C320p8rx_mask, ofsAddr + RX_mask);
699 writew(C320p8tx_mask, ofsAddr + TX_mask);
700 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
701 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
702 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
703 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
704
705 break;
706 case 16:
707 writew(C320p16rx_mask, ofsAddr + RX_mask);
708 writew(C320p16tx_mask, ofsAddr + TX_mask);
709 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
710 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
711 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
712 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
713 break;
714
715 case 24:
716 writew(C320p24rx_mask, ofsAddr + RX_mask);
717 writew(C320p24tx_mask, ofsAddr + TX_mask);
718 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
719 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
720 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
721 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
722 break;
723 case 32:
724 writew(C320p32rx_mask, ofsAddr + RX_mask);
725 writew(C320p32tx_mask, ofsAddr + TX_mask);
726 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
727 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
728 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
729 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
730 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
731 break;
732 }
733 }
734 break;
735 }
736 return 0;
737 }
738
739 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
740 {
741 const void *ptr = fw->data;
742 char rsn[64];
743 u16 lens[5];
744 size_t len;
745 unsigned int a, lenp, lencnt;
746 int ret = -EINVAL;
747 struct {
748 __le32 magic; /* 0x34303430 */
749 u8 reserved1[2];
750 u8 type; /* UNIX = 3 */
751 u8 model; /* C218T=1, C320T=2, CP204=3 */
752 u8 reserved2[8];
753 __le16 len[5];
754 } const *hdr = ptr;
755
756 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
757
758 if (fw->size < MOXA_FW_HDRLEN) {
759 strcpy(rsn, "too short (even header won't fit)");
760 goto err;
761 }
762 if (hdr->magic != cpu_to_le32(0x30343034)) {
763 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
764 goto err;
765 }
766 if (hdr->type != 3) {
767 sprintf(rsn, "not for linux, type is %u", hdr->type);
768 goto err;
769 }
770 if (moxa_check_fw_model(brd, hdr->model)) {
771 sprintf(rsn, "not for this card, model is %u", hdr->model);
772 goto err;
773 }
774
775 len = MOXA_FW_HDRLEN;
776 lencnt = hdr->model == 2 ? 5 : 3;
777 for (a = 0; a < ARRAY_SIZE(lens); a++) {
778 lens[a] = le16_to_cpu(hdr->len[a]);
779 if (lens[a] && len + lens[a] <= fw->size &&
780 moxa_check_fw(&fw->data[len]))
781 printk(KERN_WARNING "MOXA firmware: unexpected input "
782 "at offset %u, but going on\n", (u32)len);
783 if (!lens[a] && a < lencnt) {
784 sprintf(rsn, "too few entries in fw file");
785 goto err;
786 }
787 len += lens[a];
788 }
789
790 if (len != fw->size) {
791 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
792 (u32)len);
793 goto err;
794 }
795
796 ptr += MOXA_FW_HDRLEN;
797 lenp = 0; /* bios */
798
799 strcpy(rsn, "read above");
800
801 ret = moxa_load_bios(brd, ptr, lens[lenp]);
802 if (ret)
803 goto err;
804
805 /* we skip the tty section (lens[1]), since we don't need it */
806 ptr += lens[lenp] + lens[lenp + 1];
807 lenp += 2; /* comm */
808
809 if (hdr->model == 2) {
810 ret = moxa_load_320b(brd, ptr, lens[lenp]);
811 if (ret)
812 goto err;
813 /* skip another tty */
814 ptr += lens[lenp] + lens[lenp + 1];
815 lenp += 2;
816 }
817
818 ret = moxa_load_code(brd, ptr, lens[lenp]);
819 if (ret)
820 goto err;
821
822 return 0;
823 err:
824 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
825 return ret;
826 }
827
828 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
829 {
830 const struct firmware *fw;
831 const char *file;
832 struct moxa_port *p;
833 unsigned int i;
834 int ret;
835
836 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
837 GFP_KERNEL);
838 if (brd->ports == NULL) {
839 printk(KERN_ERR "cannot allocate memory for ports\n");
840 ret = -ENOMEM;
841 goto err;
842 }
843
844 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
845 tty_port_init(&p->port);
846 p->port.ops = &moxa_port_ops;
847 p->type = PORT_16550A;
848 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
849 }
850
851 switch (brd->boardType) {
852 case MOXA_BOARD_C218_ISA:
853 case MOXA_BOARD_C218_PCI:
854 file = "c218tunx.cod";
855 break;
856 case MOXA_BOARD_CP204J:
857 file = "cp204unx.cod";
858 break;
859 default:
860 file = "c320tunx.cod";
861 break;
862 }
863
864 ret = request_firmware(&fw, file, dev);
865 if (ret) {
866 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
867 "you've placed '%s' file into your firmware "
868 "loader directory (e.g. /lib/firmware)\n",
869 file);
870 goto err_free;
871 }
872
873 ret = moxa_load_fw(brd, fw);
874
875 release_firmware(fw);
876
877 if (ret)
878 goto err_free;
879
880 spin_lock_bh(&moxa_lock);
881 brd->ready = 1;
882 if (!timer_pending(&moxaTimer))
883 mod_timer(&moxaTimer, jiffies + HZ / 50);
884 spin_unlock_bh(&moxa_lock);
885
886 return 0;
887 err_free:
888 kfree(brd->ports);
889 err:
890 return ret;
891 }
892
893 static void moxa_board_deinit(struct moxa_board_conf *brd)
894 {
895 unsigned int a, opened;
896
897 mutex_lock(&moxa_openlock);
898 spin_lock_bh(&moxa_lock);
899 brd->ready = 0;
900 spin_unlock_bh(&moxa_lock);
901
902 /* pci hot-un-plug support */
903 for (a = 0; a < brd->numPorts; a++)
904 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
905 struct tty_struct *tty = tty_port_tty_get(
906 &brd->ports[a].port);
907 if (tty) {
908 tty_hangup(tty);
909 tty_kref_put(tty);
910 }
911 }
912 while (1) {
913 opened = 0;
914 for (a = 0; a < brd->numPorts; a++)
915 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
916 opened++;
917 mutex_unlock(&moxa_openlock);
918 if (!opened)
919 break;
920 msleep(50);
921 mutex_lock(&moxa_openlock);
922 }
923
924 iounmap(brd->basemem);
925 brd->basemem = NULL;
926 kfree(brd->ports);
927 }
928
929 #ifdef CONFIG_PCI
930 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
931 const struct pci_device_id *ent)
932 {
933 struct moxa_board_conf *board;
934 unsigned int i;
935 int board_type = ent->driver_data;
936 int retval;
937
938 retval = pci_enable_device(pdev);
939 if (retval) {
940 dev_err(&pdev->dev, "can't enable pci device\n");
941 goto err;
942 }
943
944 for (i = 0; i < MAX_BOARDS; i++)
945 if (moxa_boards[i].basemem == NULL)
946 break;
947
948 retval = -ENODEV;
949 if (i >= MAX_BOARDS) {
950 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
951 "found. Board is ignored.\n", MAX_BOARDS);
952 goto err;
953 }
954
955 board = &moxa_boards[i];
956
957 retval = pci_request_region(pdev, 2, "moxa-base");
958 if (retval) {
959 dev_err(&pdev->dev, "can't request pci region 2\n");
960 goto err;
961 }
962
963 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
964 if (board->basemem == NULL) {
965 dev_err(&pdev->dev, "can't remap io space 2\n");
966 goto err_reg;
967 }
968
969 board->boardType = board_type;
970 switch (board_type) {
971 case MOXA_BOARD_C218_ISA:
972 case MOXA_BOARD_C218_PCI:
973 board->numPorts = 8;
974 break;
975
976 case MOXA_BOARD_CP204J:
977 board->numPorts = 4;
978 break;
979 default:
980 board->numPorts = 0;
981 break;
982 }
983 board->busType = MOXA_BUS_TYPE_PCI;
984
985 retval = moxa_init_board(board, &pdev->dev);
986 if (retval)
987 goto err_base;
988
989 pci_set_drvdata(pdev, board);
990
991 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
992 moxa_brdname[board_type - 1], board->numPorts);
993
994 return 0;
995 err_base:
996 iounmap(board->basemem);
997 board->basemem = NULL;
998 err_reg:
999 pci_release_region(pdev, 2);
1000 err:
1001 return retval;
1002 }
1003
1004 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
1005 {
1006 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1007
1008 moxa_board_deinit(brd);
1009
1010 pci_release_region(pdev, 2);
1011 }
1012
1013 static struct pci_driver moxa_pci_driver = {
1014 .name = "moxa",
1015 .id_table = moxa_pcibrds,
1016 .probe = moxa_pci_probe,
1017 .remove = __devexit_p(moxa_pci_remove)
1018 };
1019 #endif /* CONFIG_PCI */
1020
1021 static int __init moxa_init(void)
1022 {
1023 unsigned int isabrds = 0;
1024 int retval = 0;
1025 struct moxa_board_conf *brd = moxa_boards;
1026 unsigned int i;
1027
1028 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1029 MOXA_VERSION);
1030 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1031 if (!moxaDriver)
1032 return -ENOMEM;
1033
1034 moxaDriver->owner = THIS_MODULE;
1035 moxaDriver->name = "ttyMX";
1036 moxaDriver->major = ttymajor;
1037 moxaDriver->minor_start = 0;
1038 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1039 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1040 moxaDriver->init_termios = tty_std_termios;
1041 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1042 moxaDriver->init_termios.c_ispeed = 9600;
1043 moxaDriver->init_termios.c_ospeed = 9600;
1044 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1045 tty_set_operations(moxaDriver, &moxa_ops);
1046
1047 if (tty_register_driver(moxaDriver)) {
1048 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1049 put_tty_driver(moxaDriver);
1050 return -1;
1051 }
1052
1053 /* Find the boards defined from module args. */
1054
1055 for (i = 0; i < MAX_BOARDS; i++) {
1056 if (!baseaddr[i])
1057 break;
1058 if (type[i] == MOXA_BOARD_C218_ISA ||
1059 type[i] == MOXA_BOARD_C320_ISA) {
1060 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1061 isabrds + 1, moxa_brdname[type[i] - 1],
1062 baseaddr[i]);
1063 brd->boardType = type[i];
1064 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1065 numports[i];
1066 brd->busType = MOXA_BUS_TYPE_ISA;
1067 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1068 if (!brd->basemem) {
1069 printk(KERN_ERR "MOXA: can't remap %lx\n",
1070 baseaddr[i]);
1071 continue;
1072 }
1073 if (moxa_init_board(brd, NULL)) {
1074 iounmap(brd->basemem);
1075 brd->basemem = NULL;
1076 continue;
1077 }
1078
1079 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1080 "ready (%u ports, firmware loaded)\n",
1081 baseaddr[i], brd->numPorts);
1082
1083 brd++;
1084 isabrds++;
1085 }
1086 }
1087
1088 #ifdef CONFIG_PCI
1089 retval = pci_register_driver(&moxa_pci_driver);
1090 if (retval) {
1091 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1092 if (isabrds)
1093 retval = 0;
1094 }
1095 #endif
1096
1097 return retval;
1098 }
1099
1100 static void __exit moxa_exit(void)
1101 {
1102 unsigned int i;
1103
1104 #ifdef CONFIG_PCI
1105 pci_unregister_driver(&moxa_pci_driver);
1106 #endif
1107
1108 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1109 if (moxa_boards[i].ready)
1110 moxa_board_deinit(&moxa_boards[i]);
1111
1112 del_timer_sync(&moxaTimer);
1113
1114 if (tty_unregister_driver(moxaDriver))
1115 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1116 "serial driver\n");
1117 put_tty_driver(moxaDriver);
1118 }
1119
1120 module_init(moxa_init);
1121 module_exit(moxa_exit);
1122
1123 static void moxa_shutdown(struct tty_port *port)
1124 {
1125 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1126 MoxaPortDisable(ch);
1127 MoxaPortFlushData(ch, 2);
1128 clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
1129 }
1130
1131 static int moxa_carrier_raised(struct tty_port *port)
1132 {
1133 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1134 int dcd;
1135
1136 spin_lock_irq(&port->lock);
1137 dcd = ch->DCDState;
1138 spin_unlock_irq(&port->lock);
1139 return dcd;
1140 }
1141
1142 static void moxa_dtr_rts(struct tty_port *port, int onoff)
1143 {
1144 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1145 MoxaPortLineCtrl(ch, onoff, onoff);
1146 }
1147
1148
1149 static int moxa_open(struct tty_struct *tty, struct file *filp)
1150 {
1151 struct moxa_board_conf *brd;
1152 struct moxa_port *ch;
1153 int port;
1154 int retval;
1155
1156 port = tty->index;
1157 if (port == MAX_PORTS) {
1158 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1159 }
1160 if (mutex_lock_interruptible(&moxa_openlock))
1161 return -ERESTARTSYS;
1162 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1163 if (!brd->ready) {
1164 mutex_unlock(&moxa_openlock);
1165 return -ENODEV;
1166 }
1167
1168 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1169 mutex_unlock(&moxa_openlock);
1170 return -ENODEV;
1171 }
1172
1173 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1174 ch->port.count++;
1175 tty->driver_data = ch;
1176 tty_port_tty_set(&ch->port, tty);
1177 mutex_lock(&ch->port.mutex);
1178 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1179 ch->statusflags = 0;
1180 moxa_set_tty_param(tty, tty->termios);
1181 MoxaPortLineCtrl(ch, 1, 1);
1182 MoxaPortEnable(ch);
1183 MoxaSetFifo(ch, ch->type == PORT_16550A);
1184 ch->port.flags |= ASYNC_INITIALIZED;
1185 }
1186 mutex_unlock(&ch->port.mutex);
1187 mutex_unlock(&moxa_openlock);
1188
1189 retval = tty_port_block_til_ready(&ch->port, tty, filp);
1190 if (retval == 0)
1191 set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
1192 return retval;
1193 }
1194
1195 static void moxa_close(struct tty_struct *tty, struct file *filp)
1196 {
1197 struct moxa_port *ch = tty->driver_data;
1198 ch->cflag = tty->termios->c_cflag;
1199 tty_port_close(&ch->port, tty, filp);
1200 }
1201
1202 static int moxa_write(struct tty_struct *tty,
1203 const unsigned char *buf, int count)
1204 {
1205 struct moxa_port *ch = tty->driver_data;
1206 int len;
1207
1208 if (ch == NULL)
1209 return 0;
1210
1211 spin_lock_bh(&moxa_lock);
1212 len = MoxaPortWriteData(tty, buf, count);
1213 spin_unlock_bh(&moxa_lock);
1214
1215 set_bit(LOWWAIT, &ch->statusflags);
1216 return len;
1217 }
1218
1219 static int moxa_write_room(struct tty_struct *tty)
1220 {
1221 struct moxa_port *ch;
1222
1223 if (tty->stopped)
1224 return 0;
1225 ch = tty->driver_data;
1226 if (ch == NULL)
1227 return 0;
1228 return MoxaPortTxFree(ch);
1229 }
1230
1231 static void moxa_flush_buffer(struct tty_struct *tty)
1232 {
1233 struct moxa_port *ch = tty->driver_data;
1234
1235 if (ch == NULL)
1236 return;
1237 MoxaPortFlushData(ch, 1);
1238 tty_wakeup(tty);
1239 }
1240
1241 static int moxa_chars_in_buffer(struct tty_struct *tty)
1242 {
1243 struct moxa_port *ch = tty->driver_data;
1244 int chars;
1245
1246 chars = MoxaPortTxQueue(ch);
1247 if (chars)
1248 /*
1249 * Make it possible to wakeup anything waiting for output
1250 * in tty_ioctl.c, etc.
1251 */
1252 set_bit(EMPTYWAIT, &ch->statusflags);
1253 return chars;
1254 }
1255
1256 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1257 {
1258 struct moxa_port *ch = tty->driver_data;
1259 int flag = 0, dtr, rts;
1260
1261 MoxaPortGetLineOut(ch, &dtr, &rts);
1262 if (dtr)
1263 flag |= TIOCM_DTR;
1264 if (rts)
1265 flag |= TIOCM_RTS;
1266 dtr = MoxaPortLineStatus(ch);
1267 if (dtr & 1)
1268 flag |= TIOCM_CTS;
1269 if (dtr & 2)
1270 flag |= TIOCM_DSR;
1271 if (dtr & 4)
1272 flag |= TIOCM_CD;
1273 return flag;
1274 }
1275
1276 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1277 unsigned int set, unsigned int clear)
1278 {
1279 struct moxa_port *ch;
1280 int port;
1281 int dtr, rts;
1282
1283 port = tty->index;
1284 mutex_lock(&moxa_openlock);
1285 ch = tty->driver_data;
1286 if (!ch) {
1287 mutex_unlock(&moxa_openlock);
1288 return -EINVAL;
1289 }
1290
1291 MoxaPortGetLineOut(ch, &dtr, &rts);
1292 if (set & TIOCM_RTS)
1293 rts = 1;
1294 if (set & TIOCM_DTR)
1295 dtr = 1;
1296 if (clear & TIOCM_RTS)
1297 rts = 0;
1298 if (clear & TIOCM_DTR)
1299 dtr = 0;
1300 MoxaPortLineCtrl(ch, dtr, rts);
1301 mutex_unlock(&moxa_openlock);
1302 return 0;
1303 }
1304
1305 static void moxa_set_termios(struct tty_struct *tty,
1306 struct ktermios *old_termios)
1307 {
1308 struct moxa_port *ch = tty->driver_data;
1309
1310 if (ch == NULL)
1311 return;
1312 moxa_set_tty_param(tty, old_termios);
1313 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1314 wake_up_interruptible(&ch->port.open_wait);
1315 }
1316
1317 static void moxa_stop(struct tty_struct *tty)
1318 {
1319 struct moxa_port *ch = tty->driver_data;
1320
1321 if (ch == NULL)
1322 return;
1323 MoxaPortTxDisable(ch);
1324 set_bit(TXSTOPPED, &ch->statusflags);
1325 }
1326
1327
1328 static void moxa_start(struct tty_struct *tty)
1329 {
1330 struct moxa_port *ch = tty->driver_data;
1331
1332 if (ch == NULL)
1333 return;
1334
1335 if (!(ch->statusflags & TXSTOPPED))
1336 return;
1337
1338 MoxaPortTxEnable(ch);
1339 clear_bit(TXSTOPPED, &ch->statusflags);
1340 }
1341
1342 static void moxa_hangup(struct tty_struct *tty)
1343 {
1344 struct moxa_port *ch = tty->driver_data;
1345 tty_port_hangup(&ch->port);
1346 }
1347
1348 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1349 {
1350 struct tty_struct *tty;
1351 unsigned long flags;
1352 dcd = !!dcd;
1353
1354 spin_lock_irqsave(&p->port.lock, flags);
1355 if (dcd != p->DCDState) {
1356 p->DCDState = dcd;
1357 spin_unlock_irqrestore(&p->port.lock, flags);
1358 tty = tty_port_tty_get(&p->port);
1359 if (tty && C_CLOCAL(tty) && !dcd)
1360 tty_hangup(tty);
1361 tty_kref_put(tty);
1362 }
1363 else
1364 spin_unlock_irqrestore(&p->port.lock, flags);
1365 }
1366
1367 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1368 u16 __iomem *ip)
1369 {
1370 struct tty_struct *tty = tty_port_tty_get(&p->port);
1371 void __iomem *ofsAddr;
1372 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1373 u16 intr;
1374
1375 if (tty) {
1376 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1377 MoxaPortTxQueue(p) == 0) {
1378 clear_bit(EMPTYWAIT, &p->statusflags);
1379 tty_wakeup(tty);
1380 }
1381 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1382 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1383 clear_bit(LOWWAIT, &p->statusflags);
1384 tty_wakeup(tty);
1385 }
1386
1387 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
1388 MoxaPortRxQueue(p) > 0) { /* RX */
1389 MoxaPortReadData(p);
1390 tty_schedule_flip(tty);
1391 }
1392 } else {
1393 clear_bit(EMPTYWAIT, &p->statusflags);
1394 MoxaPortFlushData(p, 0); /* flush RX */
1395 }
1396
1397 if (!handle) /* nothing else to do */
1398 goto put;
1399
1400 intr = readw(ip); /* port irq status */
1401 if (intr == 0)
1402 goto put;
1403
1404 writew(0, ip); /* ACK port */
1405 ofsAddr = p->tableAddr;
1406 if (intr & IntrTx) /* disable tx intr */
1407 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1408 ofsAddr + HostStat);
1409
1410 if (!inited)
1411 goto put;
1412
1413 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1414 tty_insert_flip_char(tty, 0, TTY_BREAK);
1415 tty_schedule_flip(tty);
1416 }
1417
1418 if (intr & IntrLine)
1419 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1420 put:
1421 tty_kref_put(tty);
1422
1423 return 0;
1424 }
1425
1426 static void moxa_poll(unsigned long ignored)
1427 {
1428 struct moxa_board_conf *brd;
1429 u16 __iomem *ip;
1430 unsigned int card, port, served = 0;
1431
1432 spin_lock(&moxa_lock);
1433 for (card = 0; card < MAX_BOARDS; card++) {
1434 brd = &moxa_boards[card];
1435 if (!brd->ready)
1436 continue;
1437
1438 served++;
1439
1440 ip = NULL;
1441 if (readb(brd->intPend) == 0xff)
1442 ip = brd->intTable + readb(brd->intNdx);
1443
1444 for (port = 0; port < brd->numPorts; port++)
1445 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1446
1447 if (ip)
1448 writeb(0, brd->intPend); /* ACK */
1449
1450 if (moxaLowWaterChk) {
1451 struct moxa_port *p = brd->ports;
1452 for (port = 0; port < brd->numPorts; port++, p++)
1453 if (p->lowChkFlag) {
1454 p->lowChkFlag = 0;
1455 moxa_low_water_check(p->tableAddr);
1456 }
1457 }
1458 }
1459 moxaLowWaterChk = 0;
1460
1461 if (served)
1462 mod_timer(&moxaTimer, jiffies + HZ / 50);
1463 spin_unlock(&moxa_lock);
1464 }
1465
1466 /******************************************************************************/
1467
1468 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1469 {
1470 register struct ktermios *ts = tty->termios;
1471 struct moxa_port *ch = tty->driver_data;
1472 int rts, cts, txflow, rxflow, xany, baud;
1473
1474 rts = cts = txflow = rxflow = xany = 0;
1475 if (ts->c_cflag & CRTSCTS)
1476 rts = cts = 1;
1477 if (ts->c_iflag & IXON)
1478 txflow = 1;
1479 if (ts->c_iflag & IXOFF)
1480 rxflow = 1;
1481 if (ts->c_iflag & IXANY)
1482 xany = 1;
1483
1484 /* Clear the features we don't support */
1485 ts->c_cflag &= ~CMSPAR;
1486 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1487 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1488 if (baud == -1)
1489 baud = tty_termios_baud_rate(old_termios);
1490 /* Not put the baud rate into the termios data */
1491 tty_encode_baud_rate(tty, baud, baud);
1492 }
1493
1494 /*****************************************************************************
1495 * Driver level functions: *
1496 *****************************************************************************/
1497
1498 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1499 {
1500 void __iomem *ofsAddr;
1501 if (mode < 0 || mode > 2)
1502 return;
1503 ofsAddr = port->tableAddr;
1504 moxafunc(ofsAddr, FC_FlushQueue, mode);
1505 if (mode != 1) {
1506 port->lowChkFlag = 0;
1507 moxa_low_water_check(ofsAddr);
1508 }
1509 }
1510
1511 /*
1512 * Moxa Port Number Description:
1513 *
1514 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1515 * the port number using in MOXA driver functions will be 0 to 31 for
1516 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1517 * to 127 for fourth. For example, if you setup three MOXA boards,
1518 * first board is C218, second board is C320-16 and third board is
1519 * C320-32. The port number of first board (C218 - 8 ports) is from
1520 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1521 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1522 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1523 * 127 will be invalid.
1524 *
1525 *
1526 * Moxa Functions Description:
1527 *
1528 * Function 1: Driver initialization routine, this routine must be
1529 * called when initialized driver.
1530 * Syntax:
1531 * void MoxaDriverInit();
1532 *
1533 *
1534 * Function 2: Moxa driver private IOCTL command processing.
1535 * Syntax:
1536 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1537 *
1538 * unsigned int cmd : IOCTL command
1539 * unsigned long arg : IOCTL argument
1540 * int port : port number (0 - 127)
1541 *
1542 * return: 0 (OK)
1543 * -EINVAL
1544 * -ENOIOCTLCMD
1545 *
1546 *
1547 * Function 6: Enable this port to start Tx/Rx data.
1548 * Syntax:
1549 * void MoxaPortEnable(int port);
1550 * int port : port number (0 - 127)
1551 *
1552 *
1553 * Function 7: Disable this port
1554 * Syntax:
1555 * void MoxaPortDisable(int port);
1556 * int port : port number (0 - 127)
1557 *
1558 *
1559 * Function 10: Setting baud rate of this port.
1560 * Syntax:
1561 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1562 * int port : port number (0 - 127)
1563 * long baud : baud rate (50 - 115200)
1564 *
1565 * return: 0 : this port is invalid or baud < 50
1566 * 50 - 115200 : the real baud rate set to the port, if
1567 * the argument baud is large than maximun
1568 * available baud rate, the real setting
1569 * baud rate will be the maximun baud rate.
1570 *
1571 *
1572 * Function 12: Configure the port.
1573 * Syntax:
1574 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1575 * int port : port number (0 - 127)
1576 * struct ktermios * termio : termio structure pointer
1577 * speed_t baud : baud rate
1578 *
1579 * return: -1 : this port is invalid or termio == NULL
1580 * 0 : setting O.K.
1581 *
1582 *
1583 * Function 13: Get the DTR/RTS state of this port.
1584 * Syntax:
1585 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1586 * int port : port number (0 - 127)
1587 * int * dtrState : pointer to INT to receive the current DTR
1588 * state. (if NULL, this function will not
1589 * write to this address)
1590 * int * rtsState : pointer to INT to receive the current RTS
1591 * state. (if NULL, this function will not
1592 * write to this address)
1593 *
1594 * return: -1 : this port is invalid
1595 * 0 : O.K.
1596 *
1597 *
1598 * Function 14: Setting the DTR/RTS output state of this port.
1599 * Syntax:
1600 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1601 * int port : port number (0 - 127)
1602 * int dtrState : DTR output state (0: off, 1: on)
1603 * int rtsState : RTS output state (0: off, 1: on)
1604 *
1605 *
1606 * Function 15: Setting the flow control of this port.
1607 * Syntax:
1608 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1609 * int txFlow,int xany);
1610 * int port : port number (0 - 127)
1611 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1612 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1613 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1614 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1615 * int xany : S/W XANY flow control (0: no, 1: yes)
1616 *
1617 *
1618 * Function 16: Get ths line status of this port
1619 * Syntax:
1620 * int MoxaPortLineStatus(int port);
1621 * int port : port number (0 - 127)
1622 *
1623 * return: Bit 0 - CTS state (0: off, 1: on)
1624 * Bit 1 - DSR state (0: off, 1: on)
1625 * Bit 2 - DCD state (0: off, 1: on)
1626 *
1627 *
1628 * Function 19: Flush the Rx/Tx buffer data of this port.
1629 * Syntax:
1630 * void MoxaPortFlushData(int port, int mode);
1631 * int port : port number (0 - 127)
1632 * int mode
1633 * 0 : flush the Rx buffer
1634 * 1 : flush the Tx buffer
1635 * 2 : flush the Rx and Tx buffer
1636 *
1637 *
1638 * Function 20: Write data.
1639 * Syntax:
1640 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1641 * int port : port number (0 - 127)
1642 * unsigned char * buffer : pointer to write data buffer.
1643 * int length : write data length
1644 *
1645 * return: 0 - length : real write data length
1646 *
1647 *
1648 * Function 21: Read data.
1649 * Syntax:
1650 * int MoxaPortReadData(int port, struct tty_struct *tty);
1651 * int port : port number (0 - 127)
1652 * struct tty_struct *tty : tty for data
1653 *
1654 * return: 0 - length : real read data length
1655 *
1656 *
1657 * Function 24: Get the Tx buffer current queued data bytes
1658 * Syntax:
1659 * int MoxaPortTxQueue(int port);
1660 * int port : port number (0 - 127)
1661 *
1662 * return: .. : Tx buffer current queued data bytes
1663 *
1664 *
1665 * Function 25: Get the Tx buffer current free space
1666 * Syntax:
1667 * int MoxaPortTxFree(int port);
1668 * int port : port number (0 - 127)
1669 *
1670 * return: .. : Tx buffer current free space
1671 *
1672 *
1673 * Function 26: Get the Rx buffer current queued data bytes
1674 * Syntax:
1675 * int MoxaPortRxQueue(int port);
1676 * int port : port number (0 - 127)
1677 *
1678 * return: .. : Rx buffer current queued data bytes
1679 *
1680 *
1681 * Function 28: Disable port data transmission.
1682 * Syntax:
1683 * void MoxaPortTxDisable(int port);
1684 * int port : port number (0 - 127)
1685 *
1686 *
1687 * Function 29: Enable port data transmission.
1688 * Syntax:
1689 * void MoxaPortTxEnable(int port);
1690 * int port : port number (0 - 127)
1691 *
1692 *
1693 * Function 31: Get the received BREAK signal count and reset it.
1694 * Syntax:
1695 * int MoxaPortResetBrkCnt(int port);
1696 * int port : port number (0 - 127)
1697 *
1698 * return: 0 - .. : BREAK signal count
1699 *
1700 *
1701 */
1702
1703 static void MoxaPortEnable(struct moxa_port *port)
1704 {
1705 void __iomem *ofsAddr;
1706 u16 lowwater = 512;
1707
1708 ofsAddr = port->tableAddr;
1709 writew(lowwater, ofsAddr + Low_water);
1710 if (MOXA_IS_320(port->board))
1711 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1712 else
1713 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1714 ofsAddr + HostStat);
1715
1716 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1717 moxafunc(ofsAddr, FC_FlushQueue, 2);
1718
1719 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1720 MoxaPortLineStatus(port);
1721 }
1722
1723 static void MoxaPortDisable(struct moxa_port *port)
1724 {
1725 void __iomem *ofsAddr = port->tableAddr;
1726
1727 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1728 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1729 writew(0, ofsAddr + HostStat);
1730 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1731 }
1732
1733 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1734 {
1735 void __iomem *ofsAddr = port->tableAddr;
1736 unsigned int clock, val;
1737 speed_t max;
1738
1739 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1740 if (baud < 50)
1741 return 0;
1742 if (baud > max)
1743 baud = max;
1744 clock = 921600;
1745 val = clock / baud;
1746 moxafunc(ofsAddr, FC_SetBaud, val);
1747 baud = clock / val;
1748 return baud;
1749 }
1750
1751 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1752 speed_t baud)
1753 {
1754 void __iomem *ofsAddr;
1755 tcflag_t cflag;
1756 tcflag_t mode = 0;
1757
1758 ofsAddr = port->tableAddr;
1759 cflag = termio->c_cflag; /* termio->c_cflag */
1760
1761 mode = termio->c_cflag & CSIZE;
1762 if (mode == CS5)
1763 mode = MX_CS5;
1764 else if (mode == CS6)
1765 mode = MX_CS6;
1766 else if (mode == CS7)
1767 mode = MX_CS7;
1768 else if (mode == CS8)
1769 mode = MX_CS8;
1770
1771 if (termio->c_cflag & CSTOPB) {
1772 if (mode == MX_CS5)
1773 mode |= MX_STOP15;
1774 else
1775 mode |= MX_STOP2;
1776 } else
1777 mode |= MX_STOP1;
1778
1779 if (termio->c_cflag & PARENB) {
1780 if (termio->c_cflag & PARODD)
1781 mode |= MX_PARODD;
1782 else
1783 mode |= MX_PAREVEN;
1784 } else
1785 mode |= MX_PARNONE;
1786
1787 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1788
1789 if (MOXA_IS_320(port->board) && baud >= 921600)
1790 return -1;
1791
1792 baud = MoxaPortSetBaud(port, baud);
1793
1794 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1795 spin_lock_irq(&moxafunc_lock);
1796 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1797 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1798 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1799 moxa_wait_finish(ofsAddr);
1800 spin_unlock_irq(&moxafunc_lock);
1801
1802 }
1803 return baud;
1804 }
1805
1806 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1807 int *rtsState)
1808 {
1809 if (dtrState)
1810 *dtrState = !!(port->lineCtrl & DTR_ON);
1811 if (rtsState)
1812 *rtsState = !!(port->lineCtrl & RTS_ON);
1813
1814 return 0;
1815 }
1816
1817 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1818 {
1819 u8 mode = 0;
1820
1821 if (dtr)
1822 mode |= DTR_ON;
1823 if (rts)
1824 mode |= RTS_ON;
1825 port->lineCtrl = mode;
1826 moxafunc(port->tableAddr, FC_LineControl, mode);
1827 }
1828
1829 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1830 int txflow, int rxflow, int txany)
1831 {
1832 int mode = 0;
1833
1834 if (rts)
1835 mode |= RTS_FlowCtl;
1836 if (cts)
1837 mode |= CTS_FlowCtl;
1838 if (txflow)
1839 mode |= Tx_FlowCtl;
1840 if (rxflow)
1841 mode |= Rx_FlowCtl;
1842 if (txany)
1843 mode |= IXM_IXANY;
1844 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1845 }
1846
1847 static int MoxaPortLineStatus(struct moxa_port *port)
1848 {
1849 void __iomem *ofsAddr;
1850 int val;
1851
1852 ofsAddr = port->tableAddr;
1853 if (MOXA_IS_320(port->board))
1854 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1855 else
1856 val = readw(ofsAddr + FlagStat) >> 4;
1857 val &= 0x0B;
1858 if (val & 8)
1859 val |= 4;
1860 moxa_new_dcdstate(port, val & 8);
1861 val &= 7;
1862 return val;
1863 }
1864
1865 static int MoxaPortWriteData(struct tty_struct *tty,
1866 const unsigned char *buffer, int len)
1867 {
1868 struct moxa_port *port = tty->driver_data;
1869 void __iomem *baseAddr, *ofsAddr, *ofs;
1870 unsigned int c, total;
1871 u16 head, tail, tx_mask, spage, epage;
1872 u16 pageno, pageofs, bufhead;
1873
1874 ofsAddr = port->tableAddr;
1875 baseAddr = port->board->basemem;
1876 tx_mask = readw(ofsAddr + TX_mask);
1877 spage = readw(ofsAddr + Page_txb);
1878 epage = readw(ofsAddr + EndPage_txb);
1879 tail = readw(ofsAddr + TXwptr);
1880 head = readw(ofsAddr + TXrptr);
1881 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1882 if (c > len)
1883 c = len;
1884 moxaLog.txcnt[port->port.tty->index] += c;
1885 total = c;
1886 if (spage == epage) {
1887 bufhead = readw(ofsAddr + Ofs_txb);
1888 writew(spage, baseAddr + Control_reg);
1889 while (c > 0) {
1890 if (head > tail)
1891 len = head - tail - 1;
1892 else
1893 len = tx_mask + 1 - tail;
1894 len = (c > len) ? len : c;
1895 ofs = baseAddr + DynPage_addr + bufhead + tail;
1896 memcpy_toio(ofs, buffer, len);
1897 buffer += len;
1898 tail = (tail + len) & tx_mask;
1899 c -= len;
1900 }
1901 } else {
1902 pageno = spage + (tail >> 13);
1903 pageofs = tail & Page_mask;
1904 while (c > 0) {
1905 len = Page_size - pageofs;
1906 if (len > c)
1907 len = c;
1908 writeb(pageno, baseAddr + Control_reg);
1909 ofs = baseAddr + DynPage_addr + pageofs;
1910 memcpy_toio(ofs, buffer, len);
1911 buffer += len;
1912 if (++pageno == epage)
1913 pageno = spage;
1914 pageofs = 0;
1915 c -= len;
1916 }
1917 tail = (tail + total) & tx_mask;
1918 }
1919 writew(tail, ofsAddr + TXwptr);
1920 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1921 return total;
1922 }
1923
1924 static int MoxaPortReadData(struct moxa_port *port)
1925 {
1926 struct tty_struct *tty = port->port.tty;
1927 unsigned char *dst;
1928 void __iomem *baseAddr, *ofsAddr, *ofs;
1929 unsigned int count, len, total;
1930 u16 tail, rx_mask, spage, epage;
1931 u16 pageno, pageofs, bufhead, head;
1932
1933 ofsAddr = port->tableAddr;
1934 baseAddr = port->board->basemem;
1935 head = readw(ofsAddr + RXrptr);
1936 tail = readw(ofsAddr + RXwptr);
1937 rx_mask = readw(ofsAddr + RX_mask);
1938 spage = readw(ofsAddr + Page_rxb);
1939 epage = readw(ofsAddr + EndPage_rxb);
1940 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1941 if (count == 0)
1942 return 0;
1943
1944 total = count;
1945 moxaLog.rxcnt[tty->index] += total;
1946 if (spage == epage) {
1947 bufhead = readw(ofsAddr + Ofs_rxb);
1948 writew(spage, baseAddr + Control_reg);
1949 while (count > 0) {
1950 ofs = baseAddr + DynPage_addr + bufhead + head;
1951 len = (tail >= head) ? (tail - head) :
1952 (rx_mask + 1 - head);
1953 len = tty_prepare_flip_string(tty, &dst,
1954 min(len, count));
1955 memcpy_fromio(dst, ofs, len);
1956 head = (head + len) & rx_mask;
1957 count -= len;
1958 }
1959 } else {
1960 pageno = spage + (head >> 13);
1961 pageofs = head & Page_mask;
1962 while (count > 0) {
1963 writew(pageno, baseAddr + Control_reg);
1964 ofs = baseAddr + DynPage_addr + pageofs;
1965 len = tty_prepare_flip_string(tty, &dst,
1966 min(Page_size - pageofs, count));
1967 memcpy_fromio(dst, ofs, len);
1968
1969 count -= len;
1970 pageofs = (pageofs + len) & Page_mask;
1971 if (pageofs == 0 && ++pageno == epage)
1972 pageno = spage;
1973 }
1974 head = (head + total) & rx_mask;
1975 }
1976 writew(head, ofsAddr + RXrptr);
1977 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1978 moxaLowWaterChk = 1;
1979 port->lowChkFlag = 1;
1980 }
1981 return total;
1982 }
1983
1984
1985 static int MoxaPortTxQueue(struct moxa_port *port)
1986 {
1987 void __iomem *ofsAddr = port->tableAddr;
1988 u16 rptr, wptr, mask;
1989
1990 rptr = readw(ofsAddr + TXrptr);
1991 wptr = readw(ofsAddr + TXwptr);
1992 mask = readw(ofsAddr + TX_mask);
1993 return (wptr - rptr) & mask;
1994 }
1995
1996 static int MoxaPortTxFree(struct moxa_port *port)
1997 {
1998 void __iomem *ofsAddr = port->tableAddr;
1999 u16 rptr, wptr, mask;
2000
2001 rptr = readw(ofsAddr + TXrptr);
2002 wptr = readw(ofsAddr + TXwptr);
2003 mask = readw(ofsAddr + TX_mask);
2004 return mask - ((wptr - rptr) & mask);
2005 }
2006
2007 static int MoxaPortRxQueue(struct moxa_port *port)
2008 {
2009 void __iomem *ofsAddr = port->tableAddr;
2010 u16 rptr, wptr, mask;
2011
2012 rptr = readw(ofsAddr + RXrptr);
2013 wptr = readw(ofsAddr + RXwptr);
2014 mask = readw(ofsAddr + RX_mask);
2015 return (wptr - rptr) & mask;
2016 }
2017
2018 static void MoxaPortTxDisable(struct moxa_port *port)
2019 {
2020 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2021 }
2022
2023 static void MoxaPortTxEnable(struct moxa_port *port)
2024 {
2025 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2026 }
2027
2028 static int moxa_get_serial_info(struct moxa_port *info,
2029 struct serial_struct __user *retinfo)
2030 {
2031 struct serial_struct tmp = {
2032 .type = info->type,
2033 .line = info->port.tty->index,
2034 .flags = info->port.flags,
2035 .baud_base = 921600,
2036 .close_delay = info->port.close_delay
2037 };
2038 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2039 }
2040
2041
2042 static int moxa_set_serial_info(struct moxa_port *info,
2043 struct serial_struct __user *new_info)
2044 {
2045 struct serial_struct new_serial;
2046
2047 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2048 return -EFAULT;
2049
2050 if (new_serial.irq != 0 || new_serial.port != 0 ||
2051 new_serial.custom_divisor != 0 ||
2052 new_serial.baud_base != 921600)
2053 return -EPERM;
2054
2055 if (!capable(CAP_SYS_ADMIN)) {
2056 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2057 (info->port.flags & ~ASYNC_USR_MASK)))
2058 return -EPERM;
2059 } else
2060 info->port.close_delay = new_serial.close_delay * HZ / 100;
2061
2062 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2063 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2064
2065 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2066
2067 info->type = new_serial.type;
2068 return 0;
2069 }
2070
2071
2072
2073 /*****************************************************************************
2074 * Static local functions: *
2075 *****************************************************************************/
2076
2077 static void MoxaSetFifo(struct moxa_port *port, int enable)
2078 {
2079 void __iomem *ofsAddr = port->tableAddr;
2080
2081 if (!enable) {
2082 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2083 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2084 } else {
2085 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2086 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2087 }
2088 }
Linus' kernel tree