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1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com.tw).
5 * Copyright (C) 2006 Jiri Slaby <jirislaby@gmail.com>
6 *
7 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
9 * 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 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
17 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
18 * - Fixed x86_64 cleanness
19 * - Fixed sleep with spinlock held in mxser_send_break
20 */
21
22 #include <linux/module.h>
23 #include <linux/autoconf.h>
24 #include <linux/errno.h>
25 #include <linux/signal.h>
26 #include <linux/sched.h>
27 #include <linux/timer.h>
28 #include <linux/interrupt.h>
29 #include <linux/tty.h>
30 #include <linux/tty_flip.h>
31 #include <linux/serial.h>
32 #include <linux/serial_reg.h>
33 #include <linux/major.h>
34 #include <linux/string.h>
35 #include <linux/fcntl.h>
36 #include <linux/ptrace.h>
37 #include <linux/gfp.h>
38 #include <linux/ioport.h>
39 #include <linux/mm.h>
40 #include <linux/smp_lock.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
43
44 #include <asm/system.h>
45 #include <asm/io.h>
46 #include <asm/irq.h>
47 #include <asm/bitops.h>
48 #include <asm/uaccess.h>
49
50 #include "mxser_new.h"
51
52 #define MXSER_VERSION "2.0"
53 #define MXSERMAJOR 174
54 #define MXSERCUMAJOR 175
55
56 #define MXSER_EVENT_TXLOW 1
57
58 #define MXSER_BOARDS 4 /* Max. boards */
59 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
60 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
61 #define MXSER_ISR_PASS_LIMIT 99999L
62
63 #define MXSER_ERR_IOADDR -1
64 #define MXSER_ERR_IRQ -2
65 #define MXSER_ERR_IRQ_CONFLIT -3
66 #define MXSER_ERR_VECTOR -4
67
68 #define WAKEUP_CHARS 256
69
70 #define UART_MCR_AFE 0x20
71 #define UART_LSR_SPECIAL 0x1E
72
73 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
74 IXON|IXOFF))
75
76 #define C168_ASIC_ID 1
77 #define C104_ASIC_ID 2
78 #define C102_ASIC_ID 0xB
79 #define CI132_ASIC_ID 4
80 #define CI134_ASIC_ID 3
81 #define CI104J_ASIC_ID 5
82
83 #define MXSER_HIGHBAUD 1
84 #define MXSER_HAS2 2
85
86 /* This is only for PCI */
87 static const struct {
88 int type;
89 int tx_fifo;
90 int rx_fifo;
91 int xmit_fifo_size;
92 int rx_high_water;
93 int rx_trigger;
94 int rx_low_water;
95 long max_baud;
96 } Gpci_uart_info[] = {
97 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
98 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
99 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
100 };
101 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
102
103 struct mxser_cardinfo {
104 unsigned int nports;
105 char *name;
106 unsigned int flags;
107 };
108
109 static const struct mxser_cardinfo mxser_cards[] = {
110 { 8, "C168 series", }, /* C168-ISA */
111 { 4, "C104 series", }, /* C104-ISA */
112 { 4, "CI-104J series", }, /* CI104J */
113 { 8, "C168H/PCI series", }, /* C168-PCI */
114 { 4, "C104H/PCI series", }, /* C104-PCI */
115 { 4, "C102 series", MXSER_HAS2 }, /* C102-ISA */
116 { 4, "CI-132 series", MXSER_HAS2 }, /* CI132 */
117 { 4, "CI-134 series", }, /* CI134 */
118 { 2, "CP-132 series", }, /* CP132 */
119 { 4, "CP-114 series", }, /* CP114 */
120 { 4, "CT-114 series", }, /* CT114 */
121 { 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */
122 { 4, "CP-104U series", }, /* CP104U */
123 { 8, "CP-168U series", }, /* CP168U */
124 { 2, "CP-132U series", }, /* CP132U */
125 { 4, "CP-134U series", }, /* CP134U */
126 { 4, "CP-104JU series", }, /* CP104JU */
127 { 8, "Moxa UC7000 Serial", }, /* RC7000 */
128 { 8, "CP-118U series", }, /* CP118U */
129 { 2, "CP-102UL series", }, /* CP102UL */
130 { 2, "CP-102U series", }, /* CP102U */
131 { 8, "CP-118EL series", }, /* CP118EL */
132 { 8, "CP-168EL series", }, /* CP168EL */
133 { 4, "CP-104EL series", } /* CP104EL */
134 };
135
136 /* driver_data correspond to the lines in the structure above
137 see also ISA probe function before you change something */
138 static struct pci_device_id mxser_pcibrds[] = {
139 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
140 .driver_data = 3 },
141 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
142 .driver_data = 4 },
143 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
144 .driver_data = 8 },
145 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
146 .driver_data = 9 },
147 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
148 .driver_data = 10 },
149 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
150 .driver_data = 11 },
151 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
152 .driver_data = 12 },
153 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
154 .driver_data = 13 },
155 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
156 .driver_data = 14 },
157 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
158 .driver_data = 15 },
159 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
160 .driver_data = 16 },
161 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
162 .driver_data = 17 },
163 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
164 .driver_data = 18 },
165 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
166 .driver_data = 19 },
167 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
168 .driver_data = 20 },
169 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
170 .driver_data = 21 },
171 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
172 .driver_data = 22 },
173 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
174 .driver_data = 23 },
175 { }
176 };
177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
178
179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
180 static int ttymajor = MXSERMAJOR;
181 static int calloutmajor = MXSERCUMAJOR;
182
183 /* Variables for insmod */
184
185 MODULE_AUTHOR("Casper Yang");
186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
187 module_param_array(ioaddr, int, NULL, 0);
188 module_param(ttymajor, int, 0);
189 MODULE_LICENSE("GPL");
190
191 struct mxser_log {
192 int tick;
193 unsigned long rxcnt[MXSER_PORTS];
194 unsigned long txcnt[MXSER_PORTS];
195 };
196
197
198 struct mxser_mon {
199 unsigned long rxcnt;
200 unsigned long txcnt;
201 unsigned long up_rxcnt;
202 unsigned long up_txcnt;
203 int modem_status;
204 unsigned char hold_reason;
205 };
206
207 struct mxser_mon_ext {
208 unsigned long rx_cnt[32];
209 unsigned long tx_cnt[32];
210 unsigned long up_rxcnt[32];
211 unsigned long up_txcnt[32];
212 int modem_status[32];
213
214 long baudrate[32];
215 int databits[32];
216 int stopbits[32];
217 int parity[32];
218 int flowctrl[32];
219 int fifo[32];
220 int iftype[32];
221 };
222
223 struct mxser_board;
224
225 struct mxser_port {
226 struct mxser_board *board;
227 struct tty_struct *tty;
228
229 unsigned long ioaddr;
230 unsigned long opmode_ioaddr;
231 int max_baud;
232
233 int rx_high_water;
234 int rx_trigger; /* Rx fifo trigger level */
235 int rx_low_water;
236 int baud_base; /* max. speed */
237 long realbaud;
238 int type; /* UART type */
239 int flags; /* defined in tty.h */
240 long session; /* Session of opening process */
241 long pgrp; /* pgrp of opening process */
242
243 int x_char; /* xon/xoff character */
244 int IER; /* Interrupt Enable Register */
245 int MCR; /* Modem control register */
246
247 unsigned char stop_rx;
248 unsigned char ldisc_stop_rx;
249
250 int custom_divisor;
251 int close_delay;
252 unsigned short closing_wait;
253 unsigned char err_shadow;
254 unsigned long event;
255
256 int count; /* # of fd on device */
257 int blocked_open; /* # of blocked opens */
258 struct async_icount icount; /* kernel counters for 4 input interrupts */
259 int timeout;
260
261 int read_status_mask;
262 int ignore_status_mask;
263 int xmit_fifo_size;
264 unsigned char *xmit_buf;
265 int xmit_head;
266 int xmit_tail;
267 int xmit_cnt;
268
269 struct termios normal_termios;
270 struct termios callout_termios;
271
272 struct mxser_mon mon_data;
273
274 spinlock_t slock;
275 struct work_struct tqueue;
276 wait_queue_head_t open_wait;
277 wait_queue_head_t close_wait;
278 wait_queue_head_t delta_msr_wait;
279 };
280
281 struct mxser_board {
282 unsigned int idx;
283 int irq;
284 const struct mxser_cardinfo *info;
285 unsigned long vector;
286 unsigned long vector_mask;
287
288 int chip_flag;
289 int uart_type;
290
291 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
292 };
293
294 struct mxser_mstatus {
295 tcflag_t cflag;
296 int cts;
297 int dsr;
298 int ri;
299 int dcd;
300 };
301
302 static struct mxser_mstatus GMStatus[MXSER_PORTS];
303
304 static int mxserBoardCAP[MXSER_BOARDS] = {
305 0, 0, 0, 0
306 /* 0x180, 0x280, 0x200, 0x320 */
307 };
308
309 static struct mxser_board mxser_boards[MXSER_BOARDS];
310 static struct tty_driver *mxvar_sdriver;
311 static struct mxser_log mxvar_log;
312 static int mxvar_diagflag;
313 static unsigned char mxser_msr[MXSER_PORTS + 1];
314 static struct mxser_mon_ext mon_data_ext;
315 static int mxser_set_baud_method[MXSER_PORTS + 1];
316 static spinlock_t gm_lock;
317
318 static int CheckIsMoxaMust(int io)
319 {
320 u8 oldmcr, hwid;
321 int i;
322
323 outb(0, io + UART_LCR);
324 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
325 oldmcr = inb(io + UART_MCR);
326 outb(0, io + UART_MCR);
327 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
328 if ((hwid = inb(io + UART_MCR)) != 0) {
329 outb(oldmcr, io + UART_MCR);
330 return MOXA_OTHER_UART;
331 }
332
333 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
334 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
335 if (hwid == Gpci_uart_info[i].type)
336 return (int)hwid;
337 }
338 return MOXA_OTHER_UART;
339 }
340
341 static void process_txrx_fifo(struct mxser_port *info)
342 {
343 int i;
344
345 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
346 info->rx_trigger = 1;
347 info->rx_high_water = 1;
348 info->rx_low_water = 1;
349 info->xmit_fifo_size = 1;
350 } else
351 for (i = 0; i < UART_INFO_NUM; i++)
352 if (info->board->chip_flag == Gpci_uart_info[i].type) {
353 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
354 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
355 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
356 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
357 break;
358 }
359 }
360
361 static void mxser_do_softint(struct work_struct *work)
362 {
363 struct mxser_port *info = container_of(work, struct mxser_port, tqueue);
364 struct tty_struct *tty = info->tty;
365
366 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
367 tty_wakeup(tty);
368 }
369
370 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
371 {
372 unsigned char status = 0;
373
374 status = inb(baseaddr + UART_MSR);
375
376 mxser_msr[port] &= 0x0F;
377 mxser_msr[port] |= status;
378 status = mxser_msr[port];
379 if (mode)
380 mxser_msr[port] = 0;
381
382 return status;
383 }
384
385 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
386 struct mxser_port *port)
387 {
388 DECLARE_WAITQUEUE(wait, current);
389 int retval;
390 int do_clocal = 0;
391 unsigned long flags;
392
393 /*
394 * If non-blocking mode is set, or the port is not enabled,
395 * then make the check up front and then exit.
396 */
397 if ((filp->f_flags & O_NONBLOCK) ||
398 test_bit(TTY_IO_ERROR, &tty->flags)) {
399 port->flags |= ASYNC_NORMAL_ACTIVE;
400 return 0;
401 }
402
403 if (tty->termios->c_cflag & CLOCAL)
404 do_clocal = 1;
405
406 /*
407 * Block waiting for the carrier detect and the line to become
408 * free (i.e., not in use by the callout). While we are in
409 * this loop, port->count is dropped by one, so that
410 * mxser_close() knows when to free things. We restore it upon
411 * exit, either normal or abnormal.
412 */
413 retval = 0;
414 add_wait_queue(&port->open_wait, &wait);
415
416 spin_lock_irqsave(&port->slock, flags);
417 if (!tty_hung_up_p(filp))
418 port->count--;
419 spin_unlock_irqrestore(&port->slock, flags);
420 port->blocked_open++;
421 while (1) {
422 spin_lock_irqsave(&port->slock, flags);
423 outb(inb(port->ioaddr + UART_MCR) |
424 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
425 spin_unlock_irqrestore(&port->slock, flags);
426 set_current_state(TASK_INTERRUPTIBLE);
427 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
428 if (port->flags & ASYNC_HUP_NOTIFY)
429 retval = -EAGAIN;
430 else
431 retval = -ERESTARTSYS;
432 break;
433 }
434 if (!(port->flags & ASYNC_CLOSING) &&
435 (do_clocal ||
436 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
437 break;
438 if (signal_pending(current)) {
439 retval = -ERESTARTSYS;
440 break;
441 }
442 schedule();
443 }
444 set_current_state(TASK_RUNNING);
445 remove_wait_queue(&port->open_wait, &wait);
446 if (!tty_hung_up_p(filp))
447 port->count++;
448 port->blocked_open--;
449 if (retval)
450 return retval;
451 port->flags |= ASYNC_NORMAL_ACTIVE;
452 return 0;
453 }
454
455 static int mxser_set_baud(struct mxser_port *info, long newspd)
456 {
457 int quot = 0;
458 unsigned char cval;
459 int ret = 0;
460 unsigned long flags;
461
462 if (!info->tty || !info->tty->termios)
463 return ret;
464
465 if (!(info->ioaddr))
466 return ret;
467
468 if (newspd > info->max_baud)
469 return 0;
470
471 info->realbaud = newspd;
472 if (newspd == 134) {
473 quot = (2 * info->baud_base / 269);
474 } else if (newspd) {
475 quot = info->baud_base / newspd;
476 if (quot == 0)
477 quot = 1;
478 } else {
479 quot = 0;
480 }
481
482 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
483 info->timeout += HZ / 50; /* Add .02 seconds of slop */
484
485 if (quot) {
486 spin_lock_irqsave(&info->slock, flags);
487 info->MCR |= UART_MCR_DTR;
488 outb(info->MCR, info->ioaddr + UART_MCR);
489 spin_unlock_irqrestore(&info->slock, flags);
490 } else {
491 spin_lock_irqsave(&info->slock, flags);
492 info->MCR &= ~UART_MCR_DTR;
493 outb(info->MCR, info->ioaddr + UART_MCR);
494 spin_unlock_irqrestore(&info->slock, flags);
495 return ret;
496 }
497
498 cval = inb(info->ioaddr + UART_LCR);
499
500 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
501
502 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
503 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
504 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
505
506
507 return ret;
508 }
509
510 /*
511 * This routine is called to set the UART divisor registers to match
512 * the specified baud rate for a serial port.
513 */
514 static int mxser_change_speed(struct mxser_port *info,
515 struct termios *old_termios)
516 {
517 unsigned cflag, cval, fcr;
518 int ret = 0;
519 unsigned char status;
520 long baud;
521 unsigned long flags;
522
523 if (!info->tty || !info->tty->termios)
524 return ret;
525 cflag = info->tty->termios->c_cflag;
526 if (!(info->ioaddr))
527 return ret;
528
529 if (mxser_set_baud_method[info->tty->index] == 0) {
530 baud = tty_get_baud_rate(info->tty);
531 mxser_set_baud(info, baud);
532 }
533
534 /* byte size and parity */
535 switch (cflag & CSIZE) {
536 case CS5:
537 cval = 0x00;
538 break;
539 case CS6:
540 cval = 0x01;
541 break;
542 case CS7:
543 cval = 0x02;
544 break;
545 case CS8:
546 cval = 0x03;
547 break;
548 default:
549 cval = 0x00;
550 break; /* too keep GCC shut... */
551 }
552 if (cflag & CSTOPB)
553 cval |= 0x04;
554 if (cflag & PARENB)
555 cval |= UART_LCR_PARITY;
556 if (!(cflag & PARODD))
557 cval |= UART_LCR_EPAR;
558 if (cflag & CMSPAR)
559 cval |= UART_LCR_SPAR;
560
561 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
562 if (info->board->chip_flag) {
563 fcr = UART_FCR_ENABLE_FIFO;
564 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
565 SET_MOXA_MUST_FIFO_VALUE(info);
566 } else
567 fcr = 0;
568 } else {
569 fcr = UART_FCR_ENABLE_FIFO;
570 if (info->board->chip_flag) {
571 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
572 SET_MOXA_MUST_FIFO_VALUE(info);
573 } else {
574 switch (info->rx_trigger) {
575 case 1:
576 fcr |= UART_FCR_TRIGGER_1;
577 break;
578 case 4:
579 fcr |= UART_FCR_TRIGGER_4;
580 break;
581 case 8:
582 fcr |= UART_FCR_TRIGGER_8;
583 break;
584 default:
585 fcr |= UART_FCR_TRIGGER_14;
586 break;
587 }
588 }
589 }
590
591 /* CTS flow control flag and modem status interrupts */
592 info->IER &= ~UART_IER_MSI;
593 info->MCR &= ~UART_MCR_AFE;
594 if (cflag & CRTSCTS) {
595 info->flags |= ASYNC_CTS_FLOW;
596 info->IER |= UART_IER_MSI;
597 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
598 info->MCR |= UART_MCR_AFE;
599 } else {
600 status = inb(info->ioaddr + UART_MSR);
601 if (info->tty->hw_stopped) {
602 if (status & UART_MSR_CTS) {
603 info->tty->hw_stopped = 0;
604 if (info->type != PORT_16550A &&
605 !info->board->chip_flag) {
606 outb(info->IER & ~UART_IER_THRI,
607 info->ioaddr +
608 UART_IER);
609 info->IER |= UART_IER_THRI;
610 outb(info->IER, info->ioaddr +
611 UART_IER);
612 }
613 set_bit(MXSER_EVENT_TXLOW, &info->event);
614 schedule_work(&info->tqueue); }
615 } else {
616 if (!(status & UART_MSR_CTS)) {
617 info->tty->hw_stopped = 1;
618 if ((info->type != PORT_16550A) &&
619 (!info->board->chip_flag)) {
620 info->IER &= ~UART_IER_THRI;
621 outb(info->IER, info->ioaddr +
622 UART_IER);
623 }
624 }
625 }
626 }
627 } else {
628 info->flags &= ~ASYNC_CTS_FLOW;
629 }
630 outb(info->MCR, info->ioaddr + UART_MCR);
631 if (cflag & CLOCAL) {
632 info->flags &= ~ASYNC_CHECK_CD;
633 } else {
634 info->flags |= ASYNC_CHECK_CD;
635 info->IER |= UART_IER_MSI;
636 }
637 outb(info->IER, info->ioaddr + UART_IER);
638
639 /*
640 * Set up parity check flag
641 */
642 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
643 if (I_INPCK(info->tty))
644 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
645 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
646 info->read_status_mask |= UART_LSR_BI;
647
648 info->ignore_status_mask = 0;
649
650 if (I_IGNBRK(info->tty)) {
651 info->ignore_status_mask |= UART_LSR_BI;
652 info->read_status_mask |= UART_LSR_BI;
653 /*
654 * If we're ignore parity and break indicators, ignore
655 * overruns too. (For real raw support).
656 */
657 if (I_IGNPAR(info->tty)) {
658 info->ignore_status_mask |=
659 UART_LSR_OE |
660 UART_LSR_PE |
661 UART_LSR_FE;
662 info->read_status_mask |=
663 UART_LSR_OE |
664 UART_LSR_PE |
665 UART_LSR_FE;
666 }
667 }
668 if (info->board->chip_flag) {
669 spin_lock_irqsave(&info->slock, flags);
670 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
671 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
672 if (I_IXON(info->tty)) {
673 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
674 } else {
675 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
676 }
677 if (I_IXOFF(info->tty)) {
678 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
679 } else {
680 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
681 }
682 spin_unlock_irqrestore(&info->slock, flags);
683 }
684
685
686 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
687 outb(cval, info->ioaddr + UART_LCR);
688
689 return ret;
690 }
691
692 static void mxser_check_modem_status(struct mxser_port *port, int status)
693 {
694 /* update input line counters */
695 if (status & UART_MSR_TERI)
696 port->icount.rng++;
697 if (status & UART_MSR_DDSR)
698 port->icount.dsr++;
699 if (status & UART_MSR_DDCD)
700 port->icount.dcd++;
701 if (status & UART_MSR_DCTS)
702 port->icount.cts++;
703 port->mon_data.modem_status = status;
704 wake_up_interruptible(&port->delta_msr_wait);
705
706 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
707 if (status & UART_MSR_DCD)
708 wake_up_interruptible(&port->open_wait);
709 schedule_work(&port->tqueue);
710 }
711
712 if (port->flags & ASYNC_CTS_FLOW) {
713 if (port->tty->hw_stopped) {
714 if (status & UART_MSR_CTS) {
715 port->tty->hw_stopped = 0;
716
717 if ((port->type != PORT_16550A) &&
718 (!port->board->chip_flag)) {
719 outb(port->IER & ~UART_IER_THRI,
720 port->ioaddr + UART_IER);
721 port->IER |= UART_IER_THRI;
722 outb(port->IER, port->ioaddr +
723 UART_IER);
724 }
725 set_bit(MXSER_EVENT_TXLOW, &port->event);
726 schedule_work(&port->tqueue);
727 }
728 } else {
729 if (!(status & UART_MSR_CTS)) {
730 port->tty->hw_stopped = 1;
731 if (port->type != PORT_16550A &&
732 !port->board->chip_flag) {
733 port->IER &= ~UART_IER_THRI;
734 outb(port->IER, port->ioaddr +
735 UART_IER);
736 }
737 }
738 }
739 }
740 }
741
742 static int mxser_startup(struct mxser_port *info)
743 {
744 unsigned long page;
745 unsigned long flags;
746
747 page = __get_free_page(GFP_KERNEL);
748 if (!page)
749 return -ENOMEM;
750
751 spin_lock_irqsave(&info->slock, flags);
752
753 if (info->flags & ASYNC_INITIALIZED) {
754 free_page(page);
755 spin_unlock_irqrestore(&info->slock, flags);
756 return 0;
757 }
758
759 if (!info->ioaddr || !info->type) {
760 if (info->tty)
761 set_bit(TTY_IO_ERROR, &info->tty->flags);
762 free_page(page);
763 spin_unlock_irqrestore(&info->slock, flags);
764 return 0;
765 }
766 if (info->xmit_buf)
767 free_page(page);
768 else
769 info->xmit_buf = (unsigned char *) page;
770
771 /*
772 * Clear the FIFO buffers and disable them
773 * (they will be reenabled in mxser_change_speed())
774 */
775 if (info->board->chip_flag)
776 outb((UART_FCR_CLEAR_RCVR |
777 UART_FCR_CLEAR_XMIT |
778 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
779 else
780 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
781 info->ioaddr + UART_FCR);
782
783 /*
784 * At this point there's no way the LSR could still be 0xFF;
785 * if it is, then bail out, because there's likely no UART
786 * here.
787 */
788 if (inb(info->ioaddr + UART_LSR) == 0xff) {
789 spin_unlock_irqrestore(&info->slock, flags);
790 if (capable(CAP_SYS_ADMIN)) {
791 if (info->tty)
792 set_bit(TTY_IO_ERROR, &info->tty->flags);
793 return 0;
794 } else
795 return -ENODEV;
796 }
797
798 /*
799 * Clear the interrupt registers.
800 */
801 (void) inb(info->ioaddr + UART_LSR);
802 (void) inb(info->ioaddr + UART_RX);
803 (void) inb(info->ioaddr + UART_IIR);
804 (void) inb(info->ioaddr + UART_MSR);
805
806 /*
807 * Now, initialize the UART
808 */
809 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
810 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
811 outb(info->MCR, info->ioaddr + UART_MCR);
812
813 /*
814 * Finally, enable interrupts
815 */
816 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
817
818 if (info->board->chip_flag)
819 info->IER |= MOXA_MUST_IER_EGDAI;
820 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
821
822 /*
823 * And clear the interrupt registers again for luck.
824 */
825 (void) inb(info->ioaddr + UART_LSR);
826 (void) inb(info->ioaddr + UART_RX);
827 (void) inb(info->ioaddr + UART_IIR);
828 (void) inb(info->ioaddr + UART_MSR);
829
830 if (info->tty)
831 clear_bit(TTY_IO_ERROR, &info->tty->flags);
832 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
833
834 /*
835 * and set the speed of the serial port
836 */
837 spin_unlock_irqrestore(&info->slock, flags);
838 mxser_change_speed(info, NULL);
839
840 info->flags |= ASYNC_INITIALIZED;
841 return 0;
842 }
843
844 /*
845 * This routine will shutdown a serial port; interrupts maybe disabled, and
846 * DTR is dropped if the hangup on close termio flag is on.
847 */
848 static void mxser_shutdown(struct mxser_port *info)
849 {
850 unsigned long flags;
851
852 if (!(info->flags & ASYNC_INITIALIZED))
853 return;
854
855 spin_lock_irqsave(&info->slock, flags);
856
857 /*
858 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
859 * here so the queue might never be waken up
860 */
861 wake_up_interruptible(&info->delta_msr_wait);
862
863 /*
864 * Free the IRQ, if necessary
865 */
866 if (info->xmit_buf) {
867 free_page((unsigned long) info->xmit_buf);
868 info->xmit_buf = NULL;
869 }
870
871 info->IER = 0;
872 outb(0x00, info->ioaddr + UART_IER);
873
874 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
875 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
876 outb(info->MCR, info->ioaddr + UART_MCR);
877
878 /* clear Rx/Tx FIFO's */
879 if (info->board->chip_flag)
880 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
881 MOXA_MUST_FCR_GDA_MODE_ENABLE,
882 info->ioaddr + UART_FCR);
883 else
884 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
885 info->ioaddr + UART_FCR);
886
887 /* read data port to reset things */
888 (void) inb(info->ioaddr + UART_RX);
889
890 if (info->tty)
891 set_bit(TTY_IO_ERROR, &info->tty->flags);
892
893 info->flags &= ~ASYNC_INITIALIZED;
894
895 if (info->board->chip_flag)
896 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
897
898 spin_unlock_irqrestore(&info->slock, flags);
899 }
900
901 /*
902 * This routine is called whenever a serial port is opened. It
903 * enables interrupts for a serial port, linking in its async structure into
904 * the IRQ chain. It also performs the serial-specific
905 * initialization for the tty structure.
906 */
907 static int mxser_open(struct tty_struct *tty, struct file *filp)
908 {
909 struct mxser_port *info;
910 int retval, line;
911
912 /* initialize driver_data in case something fails */
913 tty->driver_data = NULL;
914
915 line = tty->index;
916 if (line == MXSER_PORTS)
917 return 0;
918 if (line < 0 || line > MXSER_PORTS)
919 return -ENODEV;
920 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
921 if (!info->ioaddr)
922 return -ENODEV;
923
924 tty->driver_data = info;
925 info->tty = tty;
926 /*
927 * Start up serial port
928 */
929 info->count++;
930 retval = mxser_startup(info);
931 if (retval)
932 return retval;
933
934 retval = mxser_block_til_ready(tty, filp, info);
935 if (retval)
936 return retval;
937
938 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
939 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
940 *tty->termios = info->normal_termios;
941 else
942 *tty->termios = info->callout_termios;
943 mxser_change_speed(info, NULL);
944 }
945
946 info->session = process_session(current);
947 info->pgrp = process_group(current);
948
949 /* unmark here for very high baud rate (ex. 921600 bps) used */
950 tty->low_latency = 1;
951 return 0;
952 }
953
954 /*
955 * This routine is called when the serial port gets closed. First, we
956 * wait for the last remaining data to be sent. Then, we unlink its
957 * async structure from the interrupt chain if necessary, and we free
958 * that IRQ if nothing is left in the chain.
959 */
960 static void mxser_close(struct tty_struct *tty, struct file *filp)
961 {
962 struct mxser_port *info = tty->driver_data;
963
964 unsigned long timeout;
965 unsigned long flags;
966
967 if (tty->index == MXSER_PORTS)
968 return;
969 if (!info)
970 return;
971
972 spin_lock_irqsave(&info->slock, flags);
973
974 if (tty_hung_up_p(filp)) {
975 spin_unlock_irqrestore(&info->slock, flags);
976 return;
977 }
978 if ((tty->count == 1) && (info->count != 1)) {
979 /*
980 * Uh, oh. tty->count is 1, which means that the tty
981 * structure will be freed. Info->count should always
982 * be one in these conditions. If it's greater than
983 * one, we've got real problems, since it means the
984 * serial port won't be shutdown.
985 */
986 printk(KERN_ERR "mxser_close: bad serial port count; "
987 "tty->count is 1, info->count is %d\n", info->count);
988 info->count = 1;
989 }
990 if (--info->count < 0) {
991 printk(KERN_ERR "mxser_close: bad serial port count for "
992 "ttys%d: %d\n", tty->index, info->count);
993 info->count = 0;
994 }
995 if (info->count) {
996 spin_unlock_irqrestore(&info->slock, flags);
997 return;
998 }
999 info->flags |= ASYNC_CLOSING;
1000 spin_unlock_irqrestore(&info->slock, flags);
1001 /*
1002 * Save the termios structure, since this port may have
1003 * separate termios for callout and dialin.
1004 */
1005 if (info->flags & ASYNC_NORMAL_ACTIVE)
1006 info->normal_termios = *tty->termios;
1007 /*
1008 * Now we wait for the transmit buffer to clear; and we notify
1009 * the line discipline to only process XON/XOFF characters.
1010 */
1011 tty->closing = 1;
1012 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1013 tty_wait_until_sent(tty, info->closing_wait);
1014 /*
1015 * At this point we stop accepting input. To do this, we
1016 * disable the receive line status interrupts, and tell the
1017 * interrupt driver to stop checking the data ready bit in the
1018 * line status register.
1019 */
1020 info->IER &= ~UART_IER_RLSI;
1021 if (info->board->chip_flag)
1022 info->IER &= ~MOXA_MUST_RECV_ISR;
1023
1024 if (info->flags & ASYNC_INITIALIZED) {
1025 outb(info->IER, info->ioaddr + UART_IER);
1026 /*
1027 * Before we drop DTR, make sure the UART transmitter
1028 * has completely drained; this is especially
1029 * important if there is a transmit FIFO!
1030 */
1031 timeout = jiffies + HZ;
1032 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1033 schedule_timeout_interruptible(5);
1034 if (time_after(jiffies, timeout))
1035 break;
1036 }
1037 }
1038 mxser_shutdown(info);
1039
1040 if (tty->driver->flush_buffer)
1041 tty->driver->flush_buffer(tty);
1042
1043 tty_ldisc_flush(tty);
1044
1045 tty->closing = 0;
1046 info->event = 0;
1047 info->tty = NULL;
1048 if (info->blocked_open) {
1049 if (info->close_delay)
1050 schedule_timeout_interruptible(info->close_delay);
1051 wake_up_interruptible(&info->open_wait);
1052 }
1053
1054 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1055 wake_up_interruptible(&info->close_wait);
1056
1057 }
1058
1059 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1060 {
1061 int c, total = 0;
1062 struct mxser_port *info = tty->driver_data;
1063 unsigned long flags;
1064
1065 if (!info->xmit_buf)
1066 return 0;
1067
1068 while (1) {
1069 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1070 SERIAL_XMIT_SIZE - info->xmit_head));
1071 if (c <= 0)
1072 break;
1073
1074 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1075 spin_lock_irqsave(&info->slock, flags);
1076 info->xmit_head = (info->xmit_head + c) &
1077 (SERIAL_XMIT_SIZE - 1);
1078 info->xmit_cnt += c;
1079 spin_unlock_irqrestore(&info->slock, flags);
1080
1081 buf += c;
1082 count -= c;
1083 total += c;
1084 }
1085
1086 if (info->xmit_cnt && !tty->stopped) {
1087 if (!tty->hw_stopped ||
1088 (info->type == PORT_16550A) ||
1089 (info->board->chip_flag)) {
1090 spin_lock_irqsave(&info->slock, flags);
1091 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1092 UART_IER);
1093 info->IER |= UART_IER_THRI;
1094 outb(info->IER, info->ioaddr + UART_IER);
1095 spin_unlock_irqrestore(&info->slock, flags);
1096 }
1097 }
1098 return total;
1099 }
1100
1101 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1102 {
1103 struct mxser_port *info = tty->driver_data;
1104 unsigned long flags;
1105
1106 if (!info->xmit_buf)
1107 return;
1108
1109 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1110 return;
1111
1112 spin_lock_irqsave(&info->slock, flags);
1113 info->xmit_buf[info->xmit_head++] = ch;
1114 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1115 info->xmit_cnt++;
1116 spin_unlock_irqrestore(&info->slock, flags);
1117 if (!tty->stopped) {
1118 if (!tty->hw_stopped ||
1119 (info->type == PORT_16550A) ||
1120 info->board->chip_flag) {
1121 spin_lock_irqsave(&info->slock, flags);
1122 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1123 info->IER |= UART_IER_THRI;
1124 outb(info->IER, info->ioaddr + UART_IER);
1125 spin_unlock_irqrestore(&info->slock, flags);
1126 }
1127 }
1128 }
1129
1130
1131 static void mxser_flush_chars(struct tty_struct *tty)
1132 {
1133 struct mxser_port *info = tty->driver_data;
1134 unsigned long flags;
1135
1136 if (info->xmit_cnt <= 0 ||
1137 tty->stopped ||
1138 !info->xmit_buf ||
1139 (tty->hw_stopped &&
1140 (info->type != PORT_16550A) &&
1141 (!info->board->chip_flag)
1142 ))
1143 return;
1144
1145 spin_lock_irqsave(&info->slock, flags);
1146
1147 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1148 info->IER |= UART_IER_THRI;
1149 outb(info->IER, info->ioaddr + UART_IER);
1150
1151 spin_unlock_irqrestore(&info->slock, flags);
1152 }
1153
1154 static int mxser_write_room(struct tty_struct *tty)
1155 {
1156 struct mxser_port *info = tty->driver_data;
1157 int ret;
1158
1159 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1160 if (ret < 0)
1161 ret = 0;
1162 return ret;
1163 }
1164
1165 static int mxser_chars_in_buffer(struct tty_struct *tty)
1166 {
1167 struct mxser_port *info = tty->driver_data;
1168 return info->xmit_cnt;
1169 }
1170
1171 static void mxser_flush_buffer(struct tty_struct *tty)
1172 {
1173 struct mxser_port *info = tty->driver_data;
1174 char fcr;
1175 unsigned long flags;
1176
1177
1178 spin_lock_irqsave(&info->slock, flags);
1179 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1180
1181 fcr = inb(info->ioaddr + UART_FCR);
1182 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1183 info->ioaddr + UART_FCR);
1184 outb(fcr, info->ioaddr + UART_FCR);
1185
1186 spin_unlock_irqrestore(&info->slock, flags);
1187
1188 tty_wakeup(tty);
1189 }
1190
1191 /*
1192 * ------------------------------------------------------------
1193 * friends of mxser_ioctl()
1194 * ------------------------------------------------------------
1195 */
1196 static int mxser_get_serial_info(struct mxser_port *info,
1197 struct serial_struct __user *retinfo)
1198 {
1199 struct serial_struct tmp;
1200
1201 if (!retinfo)
1202 return -EFAULT;
1203 memset(&tmp, 0, sizeof(tmp));
1204 tmp.type = info->type;
1205 tmp.line = info->tty->index;
1206 tmp.port = info->ioaddr;
1207 tmp.irq = info->board->irq;
1208 tmp.flags = info->flags;
1209 tmp.baud_base = info->baud_base;
1210 tmp.close_delay = info->close_delay;
1211 tmp.closing_wait = info->closing_wait;
1212 tmp.custom_divisor = info->custom_divisor;
1213 tmp.hub6 = 0;
1214 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1215 return -EFAULT;
1216 return 0;
1217 }
1218
1219 static int mxser_set_serial_info(struct mxser_port *info,
1220 struct serial_struct __user *new_info)
1221 {
1222 struct serial_struct new_serial;
1223 unsigned int flags;
1224 int retval = 0;
1225
1226 if (!new_info || !info->ioaddr)
1227 return -EFAULT;
1228 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1229 return -EFAULT;
1230
1231 if ((new_serial.irq != info->board->irq) ||
1232 (new_serial.port != info->ioaddr) ||
1233 (new_serial.custom_divisor != info->custom_divisor) ||
1234 (new_serial.baud_base != info->baud_base))
1235 return -EPERM;
1236
1237 flags = info->flags & ASYNC_SPD_MASK;
1238
1239 if (!capable(CAP_SYS_ADMIN)) {
1240 if ((new_serial.baud_base != info->baud_base) ||
1241 (new_serial.close_delay != info->close_delay) ||
1242 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1243 return -EPERM;
1244 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1245 (new_serial.flags & ASYNC_USR_MASK));
1246 } else {
1247 /*
1248 * OK, past this point, all the error checking has been done.
1249 * At this point, we start making changes.....
1250 */
1251 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1252 (new_serial.flags & ASYNC_FLAGS));
1253 info->close_delay = new_serial.close_delay * HZ / 100;
1254 info->closing_wait = new_serial.closing_wait * HZ / 100;
1255 info->tty->low_latency =
1256 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1257 info->tty->low_latency = 0;
1258 }
1259
1260 info->type = new_serial.type;
1261
1262 process_txrx_fifo(info);
1263
1264 if (info->flags & ASYNC_INITIALIZED) {
1265 if (flags != (info->flags & ASYNC_SPD_MASK))
1266 mxser_change_speed(info, NULL);
1267 } else
1268 retval = mxser_startup(info);
1269
1270 return retval;
1271 }
1272
1273 /*
1274 * mxser_get_lsr_info - get line status register info
1275 *
1276 * Purpose: Let user call ioctl() to get info when the UART physically
1277 * is emptied. On bus types like RS485, the transmitter must
1278 * release the bus after transmitting. This must be done when
1279 * the transmit shift register is empty, not be done when the
1280 * transmit holding register is empty. This functionality
1281 * allows an RS485 driver to be written in user space.
1282 */
1283 static int mxser_get_lsr_info(struct mxser_port *info,
1284 unsigned int __user *value)
1285 {
1286 unsigned char status;
1287 unsigned int result;
1288 unsigned long flags;
1289
1290 spin_lock_irqsave(&info->slock, flags);
1291 status = inb(info->ioaddr + UART_LSR);
1292 spin_unlock_irqrestore(&info->slock, flags);
1293 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1294 return put_user(result, value);
1295 }
1296
1297 /*
1298 * This routine sends a break character out the serial port.
1299 */
1300 static void mxser_send_break(struct mxser_port *info, int duration)
1301 {
1302 unsigned long flags;
1303
1304 if (!info->ioaddr)
1305 return;
1306 set_current_state(TASK_INTERRUPTIBLE);
1307 spin_lock_irqsave(&info->slock, flags);
1308 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1309 info->ioaddr + UART_LCR);
1310 spin_unlock_irqrestore(&info->slock, flags);
1311 schedule_timeout(duration);
1312 spin_lock_irqsave(&info->slock, flags);
1313 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1314 info->ioaddr + UART_LCR);
1315 spin_unlock_irqrestore(&info->slock, flags);
1316 }
1317
1318 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1319 {
1320 struct mxser_port *info = tty->driver_data;
1321 unsigned char control, status;
1322 unsigned long flags;
1323
1324
1325 if (tty->index == MXSER_PORTS)
1326 return -ENOIOCTLCMD;
1327 if (test_bit(TTY_IO_ERROR, &tty->flags))
1328 return -EIO;
1329
1330 control = info->MCR;
1331
1332 spin_lock_irqsave(&info->slock, flags);
1333 status = inb(info->ioaddr + UART_MSR);
1334 if (status & UART_MSR_ANY_DELTA)
1335 mxser_check_modem_status(info, status);
1336 spin_unlock_irqrestore(&info->slock, flags);
1337 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1338 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1339 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1340 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1341 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1342 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1343 }
1344
1345 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1346 unsigned int set, unsigned int clear)
1347 {
1348 struct mxser_port *info = tty->driver_data;
1349 unsigned long flags;
1350
1351
1352 if (tty->index == MXSER_PORTS)
1353 return -ENOIOCTLCMD;
1354 if (test_bit(TTY_IO_ERROR, &tty->flags))
1355 return -EIO;
1356
1357 spin_lock_irqsave(&info->slock, flags);
1358
1359 if (set & TIOCM_RTS)
1360 info->MCR |= UART_MCR_RTS;
1361 if (set & TIOCM_DTR)
1362 info->MCR |= UART_MCR_DTR;
1363
1364 if (clear & TIOCM_RTS)
1365 info->MCR &= ~UART_MCR_RTS;
1366 if (clear & TIOCM_DTR)
1367 info->MCR &= ~UART_MCR_DTR;
1368
1369 outb(info->MCR, info->ioaddr + UART_MCR);
1370 spin_unlock_irqrestore(&info->slock, flags);
1371 return 0;
1372 }
1373
1374 static int mxser_program_mode(int port)
1375 {
1376 int id, i, j, n;
1377
1378 spin_lock(&gm_lock);
1379 outb(0, port);
1380 outb(0, port);
1381 outb(0, port);
1382 (void)inb(port);
1383 (void)inb(port);
1384 outb(0, port);
1385 (void)inb(port);
1386 spin_unlock(&gm_lock);
1387
1388 id = inb(port + 1) & 0x1F;
1389 if ((id != C168_ASIC_ID) &&
1390 (id != C104_ASIC_ID) &&
1391 (id != C102_ASIC_ID) &&
1392 (id != CI132_ASIC_ID) &&
1393 (id != CI134_ASIC_ID) &&
1394 (id != CI104J_ASIC_ID))
1395 return -1;
1396 for (i = 0, j = 0; i < 4; i++) {
1397 n = inb(port + 2);
1398 if (n == 'M') {
1399 j = 1;
1400 } else if ((j == 1) && (n == 1)) {
1401 j = 2;
1402 break;
1403 } else
1404 j = 0;
1405 }
1406 if (j != 2)
1407 id = -2;
1408 return id;
1409 }
1410
1411 static void mxser_normal_mode(int port)
1412 {
1413 int i, n;
1414
1415 outb(0xA5, port + 1);
1416 outb(0x80, port + 3);
1417 outb(12, port + 0); /* 9600 bps */
1418 outb(0, port + 1);
1419 outb(0x03, port + 3); /* 8 data bits */
1420 outb(0x13, port + 4); /* loop back mode */
1421 for (i = 0; i < 16; i++) {
1422 n = inb(port + 5);
1423 if ((n & 0x61) == 0x60)
1424 break;
1425 if ((n & 1) == 1)
1426 (void)inb(port);
1427 }
1428 outb(0x00, port + 4);
1429 }
1430
1431 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1432 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1433 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1434 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1435 #define EN_CCMD 0x000 /* Chip's command register */
1436 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1437 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1438 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1439 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1440 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1441 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1442 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1443 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1444 static int mxser_read_register(int port, unsigned short *regs)
1445 {
1446 int i, k, value, id;
1447 unsigned int j;
1448
1449 id = mxser_program_mode(port);
1450 if (id < 0)
1451 return id;
1452 for (i = 0; i < 14; i++) {
1453 k = (i & 0x3F) | 0x180;
1454 for (j = 0x100; j > 0; j >>= 1) {
1455 outb(CHIP_CS, port);
1456 if (k & j) {
1457 outb(CHIP_CS | CHIP_DO, port);
1458 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1459 } else {
1460 outb(CHIP_CS, port);
1461 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1462 }
1463 }
1464 (void)inb(port);
1465 value = 0;
1466 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1467 outb(CHIP_CS, port);
1468 outb(CHIP_CS | CHIP_SK, port);
1469 if (inb(port) & CHIP_DI)
1470 value |= j;
1471 }
1472 regs[i] = value;
1473 outb(0, port);
1474 }
1475 mxser_normal_mode(port);
1476 return id;
1477 }
1478
1479 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1480 {
1481 struct mxser_port *port;
1482 int result, status;
1483 unsigned int i, j;
1484
1485 switch (cmd) {
1486 case MOXA_GET_CONF:
1487 /* if (copy_to_user(argp, mxsercfg,
1488 sizeof(struct mxser_hwconf) * 4))
1489 return -EFAULT;
1490 return 0;*/
1491 return -ENXIO;
1492 case MOXA_GET_MAJOR:
1493 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1494 return -EFAULT;
1495 return 0;
1496
1497 case MOXA_GET_CUMAJOR:
1498 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1499 return -EFAULT;
1500 return 0;
1501
1502 case MOXA_CHKPORTENABLE:
1503 result = 0;
1504
1505 for (i = 0; i < MXSER_BOARDS; i++)
1506 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1507 if (mxser_boards[i].ports[j].ioaddr)
1508 result |= (1 << i);
1509
1510 return put_user(result, (unsigned long __user *)argp);
1511 case MOXA_GETDATACOUNT:
1512 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1513 return -EFAULT;
1514 return 0;
1515 case MOXA_GETMSTATUS:
1516 for (i = 0; i < MXSER_BOARDS; i++)
1517 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1518 port = &mxser_boards[i].ports[j];
1519
1520 GMStatus[i].ri = 0;
1521 if (!port->ioaddr) {
1522 GMStatus[i].dcd = 0;
1523 GMStatus[i].dsr = 0;
1524 GMStatus[i].cts = 0;
1525 continue;
1526 }
1527
1528 if (!port->tty || !port->tty->termios)
1529 GMStatus[i].cflag =
1530 port->normal_termios.c_cflag;
1531 else
1532 GMStatus[i].cflag =
1533 port->tty->termios->c_cflag;
1534
1535 status = inb(port->ioaddr + UART_MSR);
1536 if (status & 0x80 /*UART_MSR_DCD */ )
1537 GMStatus[i].dcd = 1;
1538 else
1539 GMStatus[i].dcd = 0;
1540
1541 if (status & 0x20 /*UART_MSR_DSR */ )
1542 GMStatus[i].dsr = 1;
1543 else
1544 GMStatus[i].dsr = 0;
1545
1546
1547 if (status & 0x10 /*UART_MSR_CTS */ )
1548 GMStatus[i].cts = 1;
1549 else
1550 GMStatus[i].cts = 0;
1551 }
1552 if (copy_to_user(argp, GMStatus,
1553 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1554 return -EFAULT;
1555 return 0;
1556 case MOXA_ASPP_MON_EXT: {
1557 int status, p, shiftbit;
1558 unsigned long opmode;
1559 unsigned cflag, iflag;
1560
1561 for (i = 0; i < MXSER_BOARDS; i++)
1562 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1563 port = &mxser_boards[i].ports[j];
1564 if (!port->ioaddr)
1565 continue;
1566
1567 status = mxser_get_msr(port->ioaddr, 0, i);
1568
1569 if (status & UART_MSR_TERI)
1570 port->icount.rng++;
1571 if (status & UART_MSR_DDSR)
1572 port->icount.dsr++;
1573 if (status & UART_MSR_DDCD)
1574 port->icount.dcd++;
1575 if (status & UART_MSR_DCTS)
1576 port->icount.cts++;
1577
1578 port->mon_data.modem_status = status;
1579 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1580 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1581 mon_data_ext.up_rxcnt[i] =
1582 port->mon_data.up_rxcnt;
1583 mon_data_ext.up_txcnt[i] =
1584 port->mon_data.up_txcnt;
1585 mon_data_ext.modem_status[i] =
1586 port->mon_data.modem_status;
1587 mon_data_ext.baudrate[i] = port->realbaud;
1588
1589 if (!port->tty || !port->tty->termios) {
1590 cflag = port->normal_termios.c_cflag;
1591 iflag = port->normal_termios.c_iflag;
1592 } else {
1593 cflag = port->tty->termios->c_cflag;
1594 iflag = port->tty->termios->c_iflag;
1595 }
1596
1597 mon_data_ext.databits[i] = cflag & CSIZE;
1598
1599 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1600
1601 mon_data_ext.parity[i] =
1602 cflag & (PARENB | PARODD | CMSPAR);
1603
1604 mon_data_ext.flowctrl[i] = 0x00;
1605
1606 if (cflag & CRTSCTS)
1607 mon_data_ext.flowctrl[i] |= 0x03;
1608
1609 if (iflag & (IXON | IXOFF))
1610 mon_data_ext.flowctrl[i] |= 0x0C;
1611
1612 if (port->type == PORT_16550A)
1613 mon_data_ext.fifo[i] = 1;
1614 else
1615 mon_data_ext.fifo[i] = 0;
1616
1617 p = i % 4;
1618 shiftbit = p * 2;
1619 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1620 opmode &= OP_MODE_MASK;
1621
1622 mon_data_ext.iftype[i] = opmode;
1623
1624 }
1625 if (copy_to_user(argp, &mon_data_ext,
1626 sizeof(mon_data_ext)))
1627 return -EFAULT;
1628
1629 return 0;
1630
1631 } default:
1632 return -ENOIOCTLCMD;
1633 }
1634 return 0;
1635 }
1636
1637 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1638 unsigned int cmd, unsigned long arg)
1639 {
1640 struct mxser_port *info = tty->driver_data;
1641 struct async_icount cprev, cnow; /* kernel counter temps */
1642 struct serial_icounter_struct __user *p_cuser;
1643 unsigned long templ;
1644 unsigned long flags;
1645 void __user *argp = (void __user *)arg;
1646 int retval;
1647
1648 if (tty->index == MXSER_PORTS)
1649 return mxser_ioctl_special(cmd, argp);
1650
1651 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1652 int p;
1653 unsigned long opmode;
1654 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1655 int shiftbit;
1656 unsigned char val, mask;
1657
1658 p = tty->index % 4;
1659 if (cmd == MOXA_SET_OP_MODE) {
1660 if (get_user(opmode, (int __user *) argp))
1661 return -EFAULT;
1662 if (opmode != RS232_MODE &&
1663 opmode != RS485_2WIRE_MODE &&
1664 opmode != RS422_MODE &&
1665 opmode != RS485_4WIRE_MODE)
1666 return -EFAULT;
1667 mask = ModeMask[p];
1668 shiftbit = p * 2;
1669 val = inb(info->opmode_ioaddr);
1670 val &= mask;
1671 val |= (opmode << shiftbit);
1672 outb(val, info->opmode_ioaddr);
1673 } else {
1674 shiftbit = p * 2;
1675 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1676 opmode &= OP_MODE_MASK;
1677 if (copy_to_user(argp, &opmode, sizeof(int)))
1678 return -EFAULT;
1679 }
1680 return 0;
1681 }
1682
1683 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1684 test_bit(TTY_IO_ERROR, &tty->flags))
1685 return -EIO;
1686
1687 switch (cmd) {
1688 case TCSBRK: /* SVID version: non-zero arg --> no break */
1689 retval = tty_check_change(tty);
1690 if (retval)
1691 return retval;
1692 tty_wait_until_sent(tty, 0);
1693 if (!arg)
1694 mxser_send_break(info, HZ / 4); /* 1/4 second */
1695 return 0;
1696 case TCSBRKP: /* support for POSIX tcsendbreak() */
1697 retval = tty_check_change(tty);
1698 if (retval)
1699 return retval;
1700 tty_wait_until_sent(tty, 0);
1701 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1702 return 0;
1703 case TIOCGSOFTCAR:
1704 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1705 case TIOCSSOFTCAR:
1706 if (get_user(templ, (unsigned long __user *) argp))
1707 return -EFAULT;
1708 arg = templ;
1709 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1710 return 0;
1711 case TIOCGSERIAL:
1712 return mxser_get_serial_info(info, argp);
1713 case TIOCSSERIAL:
1714 return mxser_set_serial_info(info, argp);
1715 case TIOCSERGETLSR: /* Get line status register */
1716 return mxser_get_lsr_info(info, argp);
1717 /*
1718 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1719 * - mask passed in arg for lines of interest
1720 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1721 * Caller should use TIOCGICOUNT to see which one it was
1722 */
1723 case TIOCMIWAIT: {
1724 DECLARE_WAITQUEUE(wait, current);
1725 int ret;
1726 spin_lock_irqsave(&info->slock, flags);
1727 cprev = info->icount; /* note the counters on entry */
1728 spin_unlock_irqrestore(&info->slock, flags);
1729
1730 add_wait_queue(&info->delta_msr_wait, &wait);
1731 while (1) {
1732 spin_lock_irqsave(&info->slock, flags);
1733 cnow = info->icount; /* atomic copy */
1734 spin_unlock_irqrestore(&info->slock, flags);
1735
1736 set_current_state(TASK_INTERRUPTIBLE);
1737 if (((arg & TIOCM_RNG) &&
1738 (cnow.rng != cprev.rng)) ||
1739 ((arg & TIOCM_DSR) &&
1740 (cnow.dsr != cprev.dsr)) ||
1741 ((arg & TIOCM_CD) &&
1742 (cnow.dcd != cprev.dcd)) ||
1743 ((arg & TIOCM_CTS) &&
1744 (cnow.cts != cprev.cts))) {
1745 ret = 0;
1746 break;
1747 }
1748 /* see if a signal did it */
1749 if (signal_pending(current)) {
1750 ret = -ERESTARTSYS;
1751 break;
1752 }
1753 cprev = cnow;
1754 }
1755 current->state = TASK_RUNNING;
1756 remove_wait_queue(&info->delta_msr_wait, &wait);
1757 break;
1758 }
1759 /* NOTREACHED */
1760 /*
1761 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1762 * Return: write counters to the user passed counter struct
1763 * NB: both 1->0 and 0->1 transitions are counted except for
1764 * RI where only 0->1 is counted.
1765 */
1766 case TIOCGICOUNT:
1767 spin_lock_irqsave(&info->slock, flags);
1768 cnow = info->icount;
1769 spin_unlock_irqrestore(&info->slock, flags);
1770 p_cuser = argp;
1771 if (put_user(cnow.frame, &p_cuser->frame))
1772 return -EFAULT;
1773 if (put_user(cnow.brk, &p_cuser->brk))
1774 return -EFAULT;
1775 if (put_user(cnow.overrun, &p_cuser->overrun))
1776 return -EFAULT;
1777 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1778 return -EFAULT;
1779 if (put_user(cnow.parity, &p_cuser->parity))
1780 return -EFAULT;
1781 if (put_user(cnow.rx, &p_cuser->rx))
1782 return -EFAULT;
1783 if (put_user(cnow.tx, &p_cuser->tx))
1784 return -EFAULT;
1785 put_user(cnow.cts, &p_cuser->cts);
1786 put_user(cnow.dsr, &p_cuser->dsr);
1787 put_user(cnow.rng, &p_cuser->rng);
1788 put_user(cnow.dcd, &p_cuser->dcd);
1789 return 0;
1790 case MOXA_HighSpeedOn:
1791 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1792 case MOXA_SDS_RSTICOUNTER:
1793 info->mon_data.rxcnt = 0;
1794 info->mon_data.txcnt = 0;
1795 return 0;
1796 case MOXA_ASPP_SETBAUD:{
1797 long baud;
1798 if (get_user(baud, (long __user *)argp))
1799 return -EFAULT;
1800 mxser_set_baud(info, baud);
1801 return 0;
1802 }
1803 case MOXA_ASPP_GETBAUD:
1804 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1805 return -EFAULT;
1806
1807 return 0;
1808
1809 case MOXA_ASPP_OQUEUE:{
1810 int len, lsr;
1811
1812 len = mxser_chars_in_buffer(tty);
1813
1814 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1815
1816 len += (lsr ? 0 : 1);
1817
1818 if (copy_to_user(argp, &len, sizeof(int)))
1819 return -EFAULT;
1820
1821 return 0;
1822 }
1823 case MOXA_ASPP_MON: {
1824 int mcr, status;
1825
1826 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1827 mxser_check_modem_status(info, status);
1828
1829 mcr = inb(info->ioaddr + UART_MCR);
1830 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1831 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1832 else
1833 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1834
1835 if (mcr & MOXA_MUST_MCR_TX_XON)
1836 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1837 else
1838 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1839
1840 if (info->tty->hw_stopped)
1841 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1842 else
1843 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1844
1845 if (copy_to_user(argp, &info->mon_data,
1846 sizeof(struct mxser_mon)))
1847 return -EFAULT;
1848
1849 return 0;
1850 }
1851 case MOXA_ASPP_LSTATUS: {
1852 if (copy_to_user(argp, &info->err_shadow,
1853 sizeof(unsigned char)))
1854 return -EFAULT;
1855
1856 info->err_shadow = 0;
1857 return 0;
1858 }
1859 case MOXA_SET_BAUD_METHOD: {
1860 int method;
1861
1862 if (get_user(method, (int __user *)argp))
1863 return -EFAULT;
1864 mxser_set_baud_method[tty->index] = method;
1865 if (copy_to_user(argp, &method, sizeof(int)))
1866 return -EFAULT;
1867
1868 return 0;
1869 }
1870 default:
1871 return -ENOIOCTLCMD;
1872 }
1873 return 0;
1874 }
1875
1876 static void mxser_stoprx(struct tty_struct *tty)
1877 {
1878 struct mxser_port *info = tty->driver_data;
1879
1880 info->ldisc_stop_rx = 1;
1881 if (I_IXOFF(tty)) {
1882 if (info->board->chip_flag) {
1883 info->IER &= ~MOXA_MUST_RECV_ISR;
1884 outb(info->IER, info->ioaddr + UART_IER);
1885 } else {
1886 info->x_char = STOP_CHAR(tty);
1887 outb(0, info->ioaddr + UART_IER);
1888 info->IER |= UART_IER_THRI;
1889 outb(info->IER, info->ioaddr + UART_IER);
1890 }
1891 }
1892
1893 if (info->tty->termios->c_cflag & CRTSCTS) {
1894 info->MCR &= ~UART_MCR_RTS;
1895 outb(info->MCR, info->ioaddr + UART_MCR);
1896 }
1897 }
1898
1899 /*
1900 * This routine is called by the upper-layer tty layer to signal that
1901 * incoming characters should be throttled.
1902 */
1903 static void mxser_throttle(struct tty_struct *tty)
1904 {
1905 mxser_stoprx(tty);
1906 }
1907
1908 static void mxser_unthrottle(struct tty_struct *tty)
1909 {
1910 struct mxser_port *info = tty->driver_data;
1911
1912 /* startrx */
1913 info->ldisc_stop_rx = 0;
1914 if (I_IXOFF(tty)) {
1915 if (info->x_char)
1916 info->x_char = 0;
1917 else {
1918 if (info->board->chip_flag) {
1919 info->IER |= MOXA_MUST_RECV_ISR;
1920 outb(info->IER, info->ioaddr + UART_IER);
1921 } else {
1922 info->x_char = START_CHAR(tty);
1923 outb(0, info->ioaddr + UART_IER);
1924 info->IER |= UART_IER_THRI;
1925 outb(info->IER, info->ioaddr + UART_IER);
1926 }
1927 }
1928 }
1929
1930 if (info->tty->termios->c_cflag & CRTSCTS) {
1931 info->MCR |= UART_MCR_RTS;
1932 outb(info->MCR, info->ioaddr + UART_MCR);
1933 }
1934 }
1935
1936 /*
1937 * mxser_stop() and mxser_start()
1938 *
1939 * This routines are called before setting or resetting tty->stopped.
1940 * They enable or disable transmitter interrupts, as necessary.
1941 */
1942 static void mxser_stop(struct tty_struct *tty)
1943 {
1944 struct mxser_port *info = tty->driver_data;
1945 unsigned long flags;
1946
1947 spin_lock_irqsave(&info->slock, flags);
1948 if (info->IER & UART_IER_THRI) {
1949 info->IER &= ~UART_IER_THRI;
1950 outb(info->IER, info->ioaddr + UART_IER);
1951 }
1952 spin_unlock_irqrestore(&info->slock, flags);
1953 }
1954
1955 static void mxser_start(struct tty_struct *tty)
1956 {
1957 struct mxser_port *info = tty->driver_data;
1958 unsigned long flags;
1959
1960 spin_lock_irqsave(&info->slock, flags);
1961 if (info->xmit_cnt && info->xmit_buf) {
1962 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1963 info->IER |= UART_IER_THRI;
1964 outb(info->IER, info->ioaddr + UART_IER);
1965 }
1966 spin_unlock_irqrestore(&info->slock, flags);
1967 }
1968
1969 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1970 {
1971 struct mxser_port *info = tty->driver_data;
1972 unsigned long flags;
1973
1974 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1975 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1976
1977 mxser_change_speed(info, old_termios);
1978
1979 if ((old_termios->c_cflag & CRTSCTS) &&
1980 !(tty->termios->c_cflag & CRTSCTS)) {
1981 tty->hw_stopped = 0;
1982 mxser_start(tty);
1983 }
1984 }
1985
1986 /* Handle sw stopped */
1987 if ((old_termios->c_iflag & IXON) &&
1988 !(tty->termios->c_iflag & IXON)) {
1989 tty->stopped = 0;
1990
1991 if (info->board->chip_flag) {
1992 spin_lock_irqsave(&info->slock, flags);
1993 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1994 spin_unlock_irqrestore(&info->slock, flags);
1995 }
1996
1997 mxser_start(tty);
1998 }
1999 }
2000
2001 /*
2002 * mxser_wait_until_sent() --- wait until the transmitter is empty
2003 */
2004 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2005 {
2006 struct mxser_port *info = tty->driver_data;
2007 unsigned long orig_jiffies, char_time;
2008 int lsr;
2009
2010 if (info->type == PORT_UNKNOWN)
2011 return;
2012
2013 if (info->xmit_fifo_size == 0)
2014 return; /* Just in case.... */
2015
2016 orig_jiffies = jiffies;
2017 /*
2018 * Set the check interval to be 1/5 of the estimated time to
2019 * send a single character, and make it at least 1. The check
2020 * interval should also be less than the timeout.
2021 *
2022 * Note: we have to use pretty tight timings here to satisfy
2023 * the NIST-PCTS.
2024 */
2025 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2026 char_time = char_time / 5;
2027 if (char_time == 0)
2028 char_time = 1;
2029 if (timeout && timeout < char_time)
2030 char_time = timeout;
2031 /*
2032 * If the transmitter hasn't cleared in twice the approximate
2033 * amount of time to send the entire FIFO, it probably won't
2034 * ever clear. This assumes the UART isn't doing flow
2035 * control, which is currently the case. Hence, if it ever
2036 * takes longer than info->timeout, this is probably due to a
2037 * UART bug of some kind. So, we clamp the timeout parameter at
2038 * 2*info->timeout.
2039 */
2040 if (!timeout || timeout > 2 * info->timeout)
2041 timeout = 2 * info->timeout;
2042 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2043 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2044 timeout, char_time);
2045 printk("jiff=%lu...", jiffies);
2046 #endif
2047 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2048 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2049 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2050 #endif
2051 schedule_timeout_interruptible(char_time);
2052 if (signal_pending(current))
2053 break;
2054 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2055 break;
2056 }
2057 set_current_state(TASK_RUNNING);
2058
2059 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2060 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2061 #endif
2062 }
2063
2064 /*
2065 * This routine is called by tty_hangup() when a hangup is signaled.
2066 */
2067 void mxser_hangup(struct tty_struct *tty)
2068 {
2069 struct mxser_port *info = tty->driver_data;
2070
2071 mxser_flush_buffer(tty);
2072 mxser_shutdown(info);
2073 info->event = 0;
2074 info->count = 0;
2075 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2076 info->tty = NULL;
2077 wake_up_interruptible(&info->open_wait);
2078 }
2079
2080 /*
2081 * mxser_rs_break() --- routine which turns the break handling on or off
2082 */
2083 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2084 {
2085 struct mxser_port *info = tty->driver_data;
2086 unsigned long flags;
2087
2088 spin_lock_irqsave(&info->slock, flags);
2089 if (break_state == -1)
2090 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2091 info->ioaddr + UART_LCR);
2092 else
2093 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2094 info->ioaddr + UART_LCR);
2095 spin_unlock_irqrestore(&info->slock, flags);
2096 }
2097
2098 static void mxser_receive_chars(struct mxser_port *port, int *status)
2099 {
2100 struct tty_struct *tty = port->tty;
2101 unsigned char ch, gdl;
2102 int ignored = 0;
2103 int cnt = 0;
2104 int recv_room;
2105 int max = 256;
2106 unsigned long flags;
2107
2108 spin_lock_irqsave(&port->slock, flags);
2109
2110 recv_room = tty->receive_room;
2111 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2112 mxser_stoprx(tty);
2113
2114 if (port->board->chip_flag != MOXA_OTHER_UART) {
2115
2116 if (*status & UART_LSR_SPECIAL)
2117 goto intr_old;
2118 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2119 (*status & MOXA_MUST_LSR_RERR))
2120 goto intr_old;
2121 if (*status & MOXA_MUST_LSR_RERR)
2122 goto intr_old;
2123
2124 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2125
2126 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2127 gdl &= MOXA_MUST_GDL_MASK;
2128 if (gdl >= recv_room) {
2129 if (!port->ldisc_stop_rx)
2130 mxser_stoprx(tty);
2131 }
2132 while (gdl--) {
2133 ch = inb(port->ioaddr + UART_RX);
2134 tty_insert_flip_char(tty, ch, 0);
2135 cnt++;
2136 }
2137 goto end_intr;
2138 }
2139 intr_old:
2140
2141 do {
2142 if (max-- < 0)
2143 break;
2144
2145 ch = inb(port->ioaddr + UART_RX);
2146 if (port->board->chip_flag && (*status & UART_LSR_OE))
2147 outb(0x23, port->ioaddr + UART_FCR);
2148 *status &= port->read_status_mask;
2149 if (*status & port->ignore_status_mask) {
2150 if (++ignored > 100)
2151 break;
2152 } else {
2153 char flag = 0;
2154 if (*status & UART_LSR_SPECIAL) {
2155 if (*status & UART_LSR_BI) {
2156 flag = TTY_BREAK;
2157 port->icount.brk++;
2158
2159 if (port->flags & ASYNC_SAK)
2160 do_SAK(tty);
2161 } else if (*status & UART_LSR_PE) {
2162 flag = TTY_PARITY;
2163 port->icount.parity++;
2164 } else if (*status & UART_LSR_FE) {
2165 flag = TTY_FRAME;
2166 port->icount.frame++;
2167 } else if (*status & UART_LSR_OE) {
2168 flag = TTY_OVERRUN;
2169 port->icount.overrun++;
2170 }
2171 }
2172 tty_insert_flip_char(tty, ch, flag);
2173 cnt++;
2174 if (cnt >= recv_room) {
2175 if (!port->ldisc_stop_rx)
2176 mxser_stoprx(tty);
2177 break;
2178 }
2179
2180 }
2181
2182 if (port->board->chip_flag)
2183 break;
2184
2185 *status = inb(port->ioaddr + UART_LSR);
2186 } while (*status & UART_LSR_DR);
2187
2188 end_intr:
2189 mxvar_log.rxcnt[port->tty->index] += cnt;
2190 port->mon_data.rxcnt += cnt;
2191 port->mon_data.up_rxcnt += cnt;
2192 spin_unlock_irqrestore(&port->slock, flags);
2193
2194 tty_flip_buffer_push(tty);
2195 }
2196
2197 static void mxser_transmit_chars(struct mxser_port *port)
2198 {
2199 int count, cnt;
2200 unsigned long flags;
2201
2202 spin_lock_irqsave(&port->slock, flags);
2203
2204 if (port->x_char) {
2205 outb(port->x_char, port->ioaddr + UART_TX);
2206 port->x_char = 0;
2207 mxvar_log.txcnt[port->tty->index]++;
2208 port->mon_data.txcnt++;
2209 port->mon_data.up_txcnt++;
2210 port->icount.tx++;
2211 goto unlock;
2212 }
2213
2214 if (port->xmit_buf == 0)
2215 goto unlock;
2216
2217 if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2218 (port->tty->hw_stopped &&
2219 (port->type != PORT_16550A) &&
2220 (!port->board->chip_flag))) {
2221 port->IER &= ~UART_IER_THRI;
2222 outb(port->IER, port->ioaddr + UART_IER);
2223 goto unlock;
2224 }
2225
2226 cnt = port->xmit_cnt;
2227 count = port->xmit_fifo_size;
2228 do {
2229 outb(port->xmit_buf[port->xmit_tail++],
2230 port->ioaddr + UART_TX);
2231 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2232 if (--port->xmit_cnt <= 0)
2233 break;
2234 } while (--count > 0);
2235 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2236
2237 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2238 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2239 port->icount.tx += (cnt - port->xmit_cnt);
2240
2241 if (port->xmit_cnt < WAKEUP_CHARS) {
2242 set_bit(MXSER_EVENT_TXLOW, &port->event);
2243 schedule_work(&port->tqueue);
2244 }
2245 if (port->xmit_cnt <= 0) {
2246 port->IER &= ~UART_IER_THRI;
2247 outb(port->IER, port->ioaddr + UART_IER);
2248 }
2249 unlock:
2250 spin_unlock_irqrestore(&port->slock, flags);
2251 }
2252
2253 /*
2254 * This is the serial driver's generic interrupt routine
2255 */
2256 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2257 {
2258 int status, iir, i;
2259 struct mxser_board *brd = NULL;
2260 struct mxser_port *port;
2261 int max, irqbits, bits, msr;
2262 int pass_counter = 0;
2263 unsigned int int_cnt;
2264 int handled = IRQ_NONE;
2265
2266 for (i = 0; i < MXSER_BOARDS; i++)
2267 if (dev_id == &mxser_boards[i]) {
2268 brd = dev_id;
2269 break;
2270 }
2271
2272 if (i == MXSER_BOARDS)
2273 goto irq_stop;
2274 if (brd == NULL)
2275 goto irq_stop;
2276 max = brd->info->nports;
2277 while (1) {
2278 irqbits = inb(brd->vector) & brd->vector_mask;
2279 if (irqbits == brd->vector_mask)
2280 break;
2281
2282 handled = IRQ_HANDLED;
2283 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2284 if (irqbits == brd->vector_mask)
2285 break;
2286 if (bits & irqbits)
2287 continue;
2288 port = &brd->ports[i];
2289
2290 int_cnt = 0;
2291 do {
2292 iir = inb(port->ioaddr + UART_IIR);
2293 if (iir & UART_IIR_NO_INT)
2294 break;
2295 iir &= MOXA_MUST_IIR_MASK;
2296 if (!port->tty) {
2297 status = inb(port->ioaddr + UART_LSR);
2298 outb(0x27, port->ioaddr + UART_FCR);
2299 inb(port->ioaddr + UART_MSR);
2300 break;
2301 }
2302
2303 status = inb(port->ioaddr + UART_LSR);
2304
2305 if (status & UART_LSR_PE)
2306 port->err_shadow |= NPPI_NOTIFY_PARITY;
2307 if (status & UART_LSR_FE)
2308 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2309 if (status & UART_LSR_OE)
2310 port->err_shadow |=
2311 NPPI_NOTIFY_HW_OVERRUN;
2312 if (status & UART_LSR_BI)
2313 port->err_shadow |= NPPI_NOTIFY_BREAK;
2314
2315 if (port->board->chip_flag) {
2316 if (iir == MOXA_MUST_IIR_GDA ||
2317 iir == MOXA_MUST_IIR_RDA ||
2318 iir == MOXA_MUST_IIR_RTO ||
2319 iir == MOXA_MUST_IIR_LSR)
2320 mxser_receive_chars(port,
2321 &status);
2322
2323 } else {
2324 status &= port->read_status_mask;
2325 if (status & UART_LSR_DR)
2326 mxser_receive_chars(port,
2327 &status);
2328 }
2329 msr = inb(port->ioaddr + UART_MSR);
2330 if (msr & UART_MSR_ANY_DELTA)
2331 mxser_check_modem_status(port, msr);
2332
2333 if (port->board->chip_flag) {
2334 if (iir == 0x02 && (status &
2335 UART_LSR_THRE))
2336 mxser_transmit_chars(port);
2337 } else {
2338 if (status & UART_LSR_THRE)
2339 mxser_transmit_chars(port);
2340 }
2341 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2342 }
2343 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
2344 break; /* Prevent infinite loops */
2345 }
2346
2347 irq_stop:
2348 return handled;
2349 }
2350
2351 static const struct tty_operations mxser_ops = {
2352 .open = mxser_open,
2353 .close = mxser_close,
2354 .write = mxser_write,
2355 .put_char = mxser_put_char,
2356 .flush_chars = mxser_flush_chars,
2357 .write_room = mxser_write_room,
2358 .chars_in_buffer = mxser_chars_in_buffer,
2359 .flush_buffer = mxser_flush_buffer,
2360 .ioctl = mxser_ioctl,
2361 .throttle = mxser_throttle,
2362 .unthrottle = mxser_unthrottle,
2363 .set_termios = mxser_set_termios,
2364 .stop = mxser_stop,
2365 .start = mxser_start,
2366 .hangup = mxser_hangup,
2367 .break_ctl = mxser_rs_break,
2368 .wait_until_sent = mxser_wait_until_sent,
2369 .tiocmget = mxser_tiocmget,
2370 .tiocmset = mxser_tiocmset,
2371 };
2372
2373 /*
2374 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2375 */
2376
2377 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2378 unsigned int irq)
2379 {
2380 if (irq)
2381 free_irq(brd->irq, brd);
2382 if (pdev != NULL) { /* PCI */
2383 pci_release_region(pdev, 2);
2384 pci_release_region(pdev, 3);
2385 pci_dev_put(pdev);
2386 } else {
2387 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2388 release_region(brd->vector, 1);
2389 }
2390 }
2391
2392 static int __devinit mxser_initbrd(struct mxser_board *brd,
2393 struct pci_dev *pdev)
2394 {
2395 struct mxser_port *info;
2396 unsigned int i;
2397 int retval;
2398
2399 printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2400
2401 for (i = 0; i < brd->info->nports; i++) {
2402 info = &brd->ports[i];
2403 info->board = brd;
2404 info->stop_rx = 0;
2405 info->ldisc_stop_rx = 0;
2406
2407 /* Enhance mode enabled here */
2408 if (brd->chip_flag != MOXA_OTHER_UART)
2409 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2410
2411 info->flags = ASYNC_SHARE_IRQ;
2412 info->type = brd->uart_type;
2413
2414 process_txrx_fifo(info);
2415
2416 info->custom_divisor = info->baud_base * 16;
2417 info->close_delay = 5 * HZ / 10;
2418 info->closing_wait = 30 * HZ;
2419 INIT_WORK(&info->tqueue, mxser_do_softint);
2420 info->normal_termios = mxvar_sdriver->init_termios;
2421 init_waitqueue_head(&info->open_wait);
2422 init_waitqueue_head(&info->close_wait);
2423 init_waitqueue_head(&info->delta_msr_wait);
2424 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2425 info->err_shadow = 0;
2426 spin_lock_init(&info->slock);
2427
2428 /* before set INT ISR, disable all int */
2429 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2430 info->ioaddr + UART_IER);
2431 }
2432 /*
2433 * Allocate the IRQ if necessary
2434 */
2435
2436 retval = request_irq(brd->irq, mxser_interrupt,
2437 (brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
2438 IRQF_DISABLED, "mxser", brd);
2439 if (retval) {
2440 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2441 "conflict with another device.\n",
2442 brd->info->name, brd->irq);
2443 /* We hold resources, we need to release them. */
2444 mxser_release_res(brd, pdev, 0);
2445 return retval;
2446 }
2447 return 0;
2448 }
2449
2450 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2451 {
2452 int id, i, bits;
2453 unsigned short regs[16], irq;
2454 unsigned char scratch, scratch2;
2455
2456 brd->chip_flag = MOXA_OTHER_UART;
2457
2458 id = mxser_read_register(cap, regs);
2459 switch (id) {
2460 case C168_ASIC_ID:
2461 brd->info = &mxser_cards[0];
2462 break;
2463 case C104_ASIC_ID:
2464 brd->info = &mxser_cards[1];
2465 break;
2466 case CI104J_ASIC_ID:
2467 brd->info = &mxser_cards[2];
2468 break;
2469 case C102_ASIC_ID:
2470 brd->info = &mxser_cards[5];
2471 break;
2472 case CI132_ASIC_ID:
2473 brd->info = &mxser_cards[6];
2474 break;
2475 case CI134_ASIC_ID:
2476 brd->info = &mxser_cards[7];
2477 break;
2478 default:
2479 return 0;
2480 }
2481
2482 irq = 0;
2483 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2484 Flag-hack checks if configuration should be read as 2-port here. */
2485 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2486 irq = regs[9] & 0xF000;
2487 irq = irq | (irq >> 4);
2488 if (irq != (regs[9] & 0xFF00))
2489 return MXSER_ERR_IRQ_CONFLIT;
2490 } else if (brd->info->nports == 4) {
2491 irq = regs[9] & 0xF000;
2492 irq = irq | (irq >> 4);
2493 irq = irq | (irq >> 8);
2494 if (irq != regs[9])
2495 return MXSER_ERR_IRQ_CONFLIT;
2496 } else if (brd->info->nports == 8) {
2497 irq = regs[9] & 0xF000;
2498 irq = irq | (irq >> 4);
2499 irq = irq | (irq >> 8);
2500 if ((irq != regs[9]) || (irq != regs[10]))
2501 return MXSER_ERR_IRQ_CONFLIT;
2502 }
2503
2504 if (!irq)
2505 return MXSER_ERR_IRQ;
2506 brd->irq = ((int)(irq & 0xF000) >> 12);
2507 for (i = 0; i < 8; i++)
2508 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2509 if ((regs[12] & 0x80) == 0)
2510 return MXSER_ERR_VECTOR;
2511 brd->vector = (int)regs[11]; /* interrupt vector */
2512 if (id == 1)
2513 brd->vector_mask = 0x00FF;
2514 else
2515 brd->vector_mask = 0x000F;
2516 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2517 if (regs[12] & bits) {
2518 brd->ports[i].baud_base = 921600;
2519 brd->ports[i].max_baud = 921600;
2520 } else {
2521 brd->ports[i].baud_base = 115200;
2522 brd->ports[i].max_baud = 115200;
2523 }
2524 }
2525 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2526 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2527 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2528 outb(scratch2, cap + UART_LCR);
2529 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2530 scratch = inb(cap + UART_IIR);
2531
2532 if (scratch & 0xC0)
2533 brd->uart_type = PORT_16550A;
2534 else
2535 brd->uart_type = PORT_16450;
2536 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2537 "mxser(IO)"))
2538 return MXSER_ERR_IOADDR;
2539 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2540 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2541 return MXSER_ERR_VECTOR;
2542 }
2543 return brd->info->nports;
2544 }
2545
2546 static int __devinit mxser_probe(struct pci_dev *pdev,
2547 const struct pci_device_id *ent)
2548 {
2549 struct mxser_board *brd;
2550 unsigned int i, j;
2551 unsigned long ioaddress;
2552 int retval = -EINVAL;
2553
2554 for (i = 0; i < MXSER_BOARDS; i++)
2555 if (mxser_boards[i].info == NULL)
2556 break;
2557
2558 if (i >= MXSER_BOARDS) {
2559 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2560 "(maximum %d), board not configured\n", MXSER_BOARDS);
2561 goto err;
2562 }
2563
2564 brd = &mxser_boards[i];
2565 brd->idx = i * MXSER_PORTS_PER_BOARD;
2566 printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2567 mxser_cards[ent->driver_data].name,
2568 pdev->bus->number, PCI_SLOT(pdev->devfn));
2569
2570 retval = pci_enable_device(pdev);
2571 if (retval) {
2572 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2573 goto err;
2574 }
2575
2576 /* io address */
2577 ioaddress = pci_resource_start(pdev, 2);
2578 retval = pci_request_region(pdev, 2, "mxser(IO)");
2579 if (retval)
2580 goto err;
2581
2582 brd->info = &mxser_cards[ent->driver_data];
2583 for (i = 0; i < brd->info->nports; i++)
2584 brd->ports[i].ioaddr = ioaddress + 8 * i;
2585
2586 /* vector */
2587 ioaddress = pci_resource_start(pdev, 3);
2588 retval = pci_request_region(pdev, 3, "mxser(vector)");
2589 if (retval)
2590 goto err_relio;
2591 brd->vector = ioaddress;
2592
2593 /* irq */
2594 brd->irq = pdev->irq;
2595
2596 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2597 brd->uart_type = PORT_16550A;
2598 brd->vector_mask = 0;
2599
2600 for (i = 0; i < brd->info->nports; i++) {
2601 for (j = 0; j < UART_INFO_NUM; j++) {
2602 if (Gpci_uart_info[j].type == brd->chip_flag) {
2603 brd->ports[i].max_baud =
2604 Gpci_uart_info[j].max_baud;
2605
2606 /* exception....CP-102 */
2607 if (brd->info->flags & MXSER_HIGHBAUD)
2608 brd->ports[i].max_baud = 921600;
2609 break;
2610 }
2611 }
2612 }
2613
2614 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2615 for (i = 0; i < brd->info->nports; i++) {
2616 if (i < 4)
2617 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2618 else
2619 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2620 }
2621 outb(0, ioaddress + 4); /* default set to RS232 mode */
2622 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2623 }
2624
2625 for (i = 0; i < brd->info->nports; i++) {
2626 brd->vector_mask |= (1 << i);
2627 brd->ports[i].baud_base = 921600;
2628 }
2629
2630 /* mxser_initbrd will hook ISR. */
2631 if (mxser_initbrd(brd, pdev) < 0)
2632 goto err_relvec;
2633
2634 for (i = 0; i < brd->info->nports; i++)
2635 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2636
2637 pci_set_drvdata(pdev, brd);
2638
2639 return 0;
2640 err_relvec:
2641 pci_release_region(pdev, 3);
2642 err_relio:
2643 pci_release_region(pdev, 2);
2644 brd->info = NULL;
2645 err:
2646 return retval;
2647 }
2648
2649 static void __devexit mxser_remove(struct pci_dev *pdev)
2650 {
2651 struct mxser_board *brd = pci_get_drvdata(pdev);
2652 unsigned int i;
2653
2654 for (i = 0; i < brd->info->nports; i++)
2655 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2656
2657 mxser_release_res(brd, pdev, 1);
2658 }
2659
2660 static struct pci_driver mxser_driver = {
2661 .name = "mxser",
2662 .id_table = mxser_pcibrds,
2663 .probe = mxser_probe,
2664 .remove = __devexit_p(mxser_remove)
2665 };
2666
2667 static int __init mxser_module_init(void)
2668 {
2669 struct mxser_board *brd;
2670 unsigned long cap;
2671 unsigned int i, m, isaloop;
2672 int retval, b;
2673
2674 pr_debug("Loading module mxser ...\n");
2675
2676 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2677 if (!mxvar_sdriver)
2678 return -ENOMEM;
2679 spin_lock_init(&gm_lock);
2680
2681 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2682 MXSER_VERSION);
2683
2684 /* Initialize the tty_driver structure */
2685 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2686 mxvar_sdriver->name = "ttyMI";
2687 mxvar_sdriver->major = ttymajor;
2688 mxvar_sdriver->minor_start = 0;
2689 mxvar_sdriver->num = MXSER_PORTS + 1;
2690 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2691 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2692 mxvar_sdriver->init_termios = tty_std_termios;
2693 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2694 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2695 tty_set_operations(mxvar_sdriver, &mxser_ops);
2696
2697 retval = tty_register_driver(mxvar_sdriver);
2698 if (retval) {
2699 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2700 "tty driver !\n");
2701 goto err_put;
2702 }
2703
2704 mxvar_diagflag = 0;
2705
2706 m = 0;
2707 /* Start finding ISA boards here */
2708 for (isaloop = 0; isaloop < 2; isaloop++)
2709 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2710 if (!isaloop)
2711 cap = mxserBoardCAP[b]; /* predefined */
2712 else
2713 cap = ioaddr[b]; /* module param */
2714
2715 if (!cap)
2716 continue;
2717
2718 brd = &mxser_boards[m];
2719 retval = mxser_get_ISA_conf(cap, brd);
2720
2721 if (retval != 0)
2722 printk(KERN_INFO "Found MOXA %s board "
2723 "(CAP=0x%x)\n",
2724 brd->info->name, ioaddr[b]);
2725
2726 if (retval <= 0) {
2727 if (retval == MXSER_ERR_IRQ)
2728 printk(KERN_ERR "Invalid interrupt "
2729 "number, board not "
2730 "configured\n");
2731 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2732 printk(KERN_ERR "Invalid interrupt "
2733 "number, board not "
2734 "configured\n");
2735 else if (retval == MXSER_ERR_VECTOR)
2736 printk(KERN_ERR "Invalid interrupt "
2737 "vector, board not "
2738 "configured\n");
2739 else if (retval == MXSER_ERR_IOADDR)
2740 printk(KERN_ERR "Invalid I/O address, "
2741 "board not configured\n");
2742
2743 brd->info = NULL;
2744 continue;
2745 }
2746
2747 /* mxser_initbrd will hook ISR. */
2748 if (mxser_initbrd(brd, NULL) < 0) {
2749 brd->info = NULL;
2750 continue;
2751 }
2752
2753 brd->idx = m * MXSER_PORTS_PER_BOARD;
2754 for (i = 0; i < brd->info->nports; i++)
2755 tty_register_device(mxvar_sdriver, brd->idx + i,
2756 NULL);
2757
2758 m++;
2759 }
2760
2761 retval = pci_register_driver(&mxser_driver);
2762 if (retval) {
2763 printk(KERN_ERR "Can't register pci driver\n");
2764 if (!m) {
2765 retval = -ENODEV;
2766 goto err_unr;
2767 } /* else: we have some ISA cards under control */
2768 }
2769
2770 pr_debug("Done.\n");
2771
2772 return 0;
2773 err_unr:
2774 tty_unregister_driver(mxvar_sdriver);
2775 err_put:
2776 put_tty_driver(mxvar_sdriver);
2777 return retval;
2778 }
2779
2780 static void __exit mxser_module_exit(void)
2781 {
2782 unsigned int i, j;
2783
2784 pr_debug("Unloading module mxser ...\n");
2785
2786 pci_unregister_driver(&mxser_driver);
2787
2788 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2789 if (mxser_boards[i].info != NULL)
2790 for (j = 0; j < mxser_boards[i].info->nports; j++)
2791 tty_unregister_device(mxvar_sdriver,
2792 mxser_boards[i].idx + j);
2793 tty_unregister_driver(mxvar_sdriver);
2794 put_tty_driver(mxvar_sdriver);
2795
2796 for (i = 0; i < MXSER_BOARDS; i++)
2797 if (mxser_boards[i].info != NULL)
2798 mxser_release_res(&mxser_boards[i], NULL, 1);
2799
2800 pr_debug("Done.\n");
2801 }
2802
2803 module_init(mxser_module_init);
2804 module_exit(mxser_module_exit);
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