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[PATCH] Char: mxser_new, clean request_irq call
[linux-2.6/libata-dev.git] / drivers / char / mxser_new.c
blob8da883340dd67db31acf7709c54bc50930a211c9
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
241 int x_char; /* xon/xoff character */
242 int IER; /* Interrupt Enable Register */
243 int MCR; /* Modem control register */
244
245 unsigned char stop_rx;
246 unsigned char ldisc_stop_rx;
247
248 int custom_divisor;
249 int close_delay;
250 unsigned short closing_wait;
251 unsigned char err_shadow;
252 unsigned long event;
253
254 int count; /* # of fd on device */
255 int blocked_open; /* # of blocked opens */
256 struct async_icount icount; /* kernel counters for 4 input interrupts */
257 int timeout;
258
259 int read_status_mask;
260 int ignore_status_mask;
261 int xmit_fifo_size;
262 unsigned char *xmit_buf;
263 int xmit_head;
264 int xmit_tail;
265 int xmit_cnt;
266
267 struct ktermios normal_termios;
268
269 struct mxser_mon mon_data;
270
271 spinlock_t slock;
272 wait_queue_head_t open_wait;
273 wait_queue_head_t delta_msr_wait;
274 };
275
276 struct mxser_board {
277 unsigned int idx;
278 int irq;
279 const struct mxser_cardinfo *info;
280 unsigned long vector;
281 unsigned long vector_mask;
282
283 int chip_flag;
284 int uart_type;
285
286 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
287 };
288
289 struct mxser_mstatus {
290 tcflag_t cflag;
291 int cts;
292 int dsr;
293 int ri;
294 int dcd;
295 };
296
297 static struct mxser_mstatus GMStatus[MXSER_PORTS];
298
299 static int mxserBoardCAP[MXSER_BOARDS] = {
300 0, 0, 0, 0
301 /* 0x180, 0x280, 0x200, 0x320 */
302 };
303
304 static struct mxser_board mxser_boards[MXSER_BOARDS];
305 static struct tty_driver *mxvar_sdriver;
306 static struct mxser_log mxvar_log;
307 static int mxvar_diagflag;
308 static unsigned char mxser_msr[MXSER_PORTS + 1];
309 static struct mxser_mon_ext mon_data_ext;
310 static int mxser_set_baud_method[MXSER_PORTS + 1];
311
312 #ifdef CONFIG_PCI
313 static int __devinit CheckIsMoxaMust(int io)
314 {
315 u8 oldmcr, hwid;
316 int i;
317
318 outb(0, io + UART_LCR);
319 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
320 oldmcr = inb(io + UART_MCR);
321 outb(0, io + UART_MCR);
322 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
323 if ((hwid = inb(io + UART_MCR)) != 0) {
324 outb(oldmcr, io + UART_MCR);
325 return MOXA_OTHER_UART;
326 }
327
328 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
329 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
330 if (hwid == Gpci_uart_info[i].type)
331 return (int)hwid;
332 }
333 return MOXA_OTHER_UART;
334 }
335 #endif
336
337 static void process_txrx_fifo(struct mxser_port *info)
338 {
339 int i;
340
341 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
342 info->rx_trigger = 1;
343 info->rx_high_water = 1;
344 info->rx_low_water = 1;
345 info->xmit_fifo_size = 1;
346 } else
347 for (i = 0; i < UART_INFO_NUM; i++)
348 if (info->board->chip_flag == Gpci_uart_info[i].type) {
349 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
350 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
351 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
352 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
353 break;
354 }
355 }
356
357 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
358 {
359 unsigned char status = 0;
360
361 status = inb(baseaddr + UART_MSR);
362
363 mxser_msr[port] &= 0x0F;
364 mxser_msr[port] |= status;
365 status = mxser_msr[port];
366 if (mode)
367 mxser_msr[port] = 0;
368
369 return status;
370 }
371
372 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
373 struct mxser_port *port)
374 {
375 DECLARE_WAITQUEUE(wait, current);
376 int retval;
377 int do_clocal = 0;
378 unsigned long flags;
379
380 /*
381 * If non-blocking mode is set, or the port is not enabled,
382 * then make the check up front and then exit.
383 */
384 if ((filp->f_flags & O_NONBLOCK) ||
385 test_bit(TTY_IO_ERROR, &tty->flags)) {
386 port->flags |= ASYNC_NORMAL_ACTIVE;
387 return 0;
388 }
389
390 if (tty->termios->c_cflag & CLOCAL)
391 do_clocal = 1;
392
393 /*
394 * Block waiting for the carrier detect and the line to become
395 * free (i.e., not in use by the callout). While we are in
396 * this loop, port->count is dropped by one, so that
397 * mxser_close() knows when to free things. We restore it upon
398 * exit, either normal or abnormal.
399 */
400 retval = 0;
401 add_wait_queue(&port->open_wait, &wait);
402
403 spin_lock_irqsave(&port->slock, flags);
404 if (!tty_hung_up_p(filp))
405 port->count--;
406 spin_unlock_irqrestore(&port->slock, flags);
407 port->blocked_open++;
408 while (1) {
409 spin_lock_irqsave(&port->slock, flags);
410 outb(inb(port->ioaddr + UART_MCR) |
411 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
412 spin_unlock_irqrestore(&port->slock, flags);
413 set_current_state(TASK_INTERRUPTIBLE);
414 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
415 if (port->flags & ASYNC_HUP_NOTIFY)
416 retval = -EAGAIN;
417 else
418 retval = -ERESTARTSYS;
419 break;
420 }
421 if (!(port->flags & ASYNC_CLOSING) &&
422 (do_clocal ||
423 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
424 break;
425 if (signal_pending(current)) {
426 retval = -ERESTARTSYS;
427 break;
428 }
429 schedule();
430 }
431 set_current_state(TASK_RUNNING);
432 remove_wait_queue(&port->open_wait, &wait);
433 if (!tty_hung_up_p(filp))
434 port->count++;
435 port->blocked_open--;
436 if (retval)
437 return retval;
438 port->flags |= ASYNC_NORMAL_ACTIVE;
439 return 0;
440 }
441
442 static int mxser_set_baud(struct mxser_port *info, long newspd)
443 {
444 int quot = 0;
445 unsigned char cval;
446 int ret = 0;
447 unsigned long flags;
448
449 if (!info->tty || !info->tty->termios)
450 return ret;
451
452 if (!(info->ioaddr))
453 return ret;
454
455 if (newspd > info->max_baud)
456 return 0;
457
458 info->realbaud = newspd;
459 if (newspd == 134) {
460 quot = (2 * info->baud_base / 269);
461 } else if (newspd) {
462 quot = info->baud_base / newspd;
463 if (quot == 0)
464 quot = 1;
465 } else {
466 quot = 0;
467 }
468
469 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
470 info->timeout += HZ / 50; /* Add .02 seconds of slop */
471
472 if (quot) {
473 spin_lock_irqsave(&info->slock, flags);
474 info->MCR |= UART_MCR_DTR;
475 outb(info->MCR, info->ioaddr + UART_MCR);
476 spin_unlock_irqrestore(&info->slock, flags);
477 } else {
478 spin_lock_irqsave(&info->slock, flags);
479 info->MCR &= ~UART_MCR_DTR;
480 outb(info->MCR, info->ioaddr + UART_MCR);
481 spin_unlock_irqrestore(&info->slock, flags);
482 return ret;
483 }
484
485 cval = inb(info->ioaddr + UART_LCR);
486
487 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
488
489 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
490 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
491 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
492
493
494 return ret;
495 }
496
497 /*
498 * This routine is called to set the UART divisor registers to match
499 * the specified baud rate for a serial port.
500 */
501 static int mxser_change_speed(struct mxser_port *info,
502 struct ktermios *old_termios)
503 {
504 unsigned cflag, cval, fcr;
505 int ret = 0;
506 unsigned char status;
507 long baud;
508 unsigned long flags;
509
510 if (!info->tty || !info->tty->termios)
511 return ret;
512 cflag = info->tty->termios->c_cflag;
513 if (!(info->ioaddr))
514 return ret;
515
516 if (mxser_set_baud_method[info->tty->index] == 0) {
517 baud = tty_get_baud_rate(info->tty);
518 mxser_set_baud(info, baud);
519 }
520
521 /* byte size and parity */
522 switch (cflag & CSIZE) {
523 case CS5:
524 cval = 0x00;
525 break;
526 case CS6:
527 cval = 0x01;
528 break;
529 case CS7:
530 cval = 0x02;
531 break;
532 case CS8:
533 cval = 0x03;
534 break;
535 default:
536 cval = 0x00;
537 break; /* too keep GCC shut... */
538 }
539 if (cflag & CSTOPB)
540 cval |= 0x04;
541 if (cflag & PARENB)
542 cval |= UART_LCR_PARITY;
543 if (!(cflag & PARODD))
544 cval |= UART_LCR_EPAR;
545 if (cflag & CMSPAR)
546 cval |= UART_LCR_SPAR;
547
548 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
549 if (info->board->chip_flag) {
550 fcr = UART_FCR_ENABLE_FIFO;
551 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
552 SET_MOXA_MUST_FIFO_VALUE(info);
553 } else
554 fcr = 0;
555 } else {
556 fcr = UART_FCR_ENABLE_FIFO;
557 if (info->board->chip_flag) {
558 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
559 SET_MOXA_MUST_FIFO_VALUE(info);
560 } else {
561 switch (info->rx_trigger) {
562 case 1:
563 fcr |= UART_FCR_TRIGGER_1;
564 break;
565 case 4:
566 fcr |= UART_FCR_TRIGGER_4;
567 break;
568 case 8:
569 fcr |= UART_FCR_TRIGGER_8;
570 break;
571 default:
572 fcr |= UART_FCR_TRIGGER_14;
573 break;
574 }
575 }
576 }
577
578 /* CTS flow control flag and modem status interrupts */
579 info->IER &= ~UART_IER_MSI;
580 info->MCR &= ~UART_MCR_AFE;
581 if (cflag & CRTSCTS) {
582 info->flags |= ASYNC_CTS_FLOW;
583 info->IER |= UART_IER_MSI;
584 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
585 info->MCR |= UART_MCR_AFE;
586 } else {
587 status = inb(info->ioaddr + UART_MSR);
588 if (info->tty->hw_stopped) {
589 if (status & UART_MSR_CTS) {
590 info->tty->hw_stopped = 0;
591 if (info->type != PORT_16550A &&
592 !info->board->chip_flag) {
593 outb(info->IER & ~UART_IER_THRI,
594 info->ioaddr +
595 UART_IER);
596 info->IER |= UART_IER_THRI;
597 outb(info->IER, info->ioaddr +
598 UART_IER);
599 }
600 tty_wakeup(info->tty);
601 }
602 } else {
603 if (!(status & UART_MSR_CTS)) {
604 info->tty->hw_stopped = 1;
605 if ((info->type != PORT_16550A) &&
606 (!info->board->chip_flag)) {
607 info->IER &= ~UART_IER_THRI;
608 outb(info->IER, info->ioaddr +
609 UART_IER);
610 }
611 }
612 }
613 }
614 } else {
615 info->flags &= ~ASYNC_CTS_FLOW;
616 }
617 outb(info->MCR, info->ioaddr + UART_MCR);
618 if (cflag & CLOCAL) {
619 info->flags &= ~ASYNC_CHECK_CD;
620 } else {
621 info->flags |= ASYNC_CHECK_CD;
622 info->IER |= UART_IER_MSI;
623 }
624 outb(info->IER, info->ioaddr + UART_IER);
625
626 /*
627 * Set up parity check flag
628 */
629 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
630 if (I_INPCK(info->tty))
631 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
632 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
633 info->read_status_mask |= UART_LSR_BI;
634
635 info->ignore_status_mask = 0;
636
637 if (I_IGNBRK(info->tty)) {
638 info->ignore_status_mask |= UART_LSR_BI;
639 info->read_status_mask |= UART_LSR_BI;
640 /*
641 * If we're ignore parity and break indicators, ignore
642 * overruns too. (For real raw support).
643 */
644 if (I_IGNPAR(info->tty)) {
645 info->ignore_status_mask |=
646 UART_LSR_OE |
647 UART_LSR_PE |
648 UART_LSR_FE;
649 info->read_status_mask |=
650 UART_LSR_OE |
651 UART_LSR_PE |
652 UART_LSR_FE;
653 }
654 }
655 if (info->board->chip_flag) {
656 spin_lock_irqsave(&info->slock, flags);
657 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
658 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
659 if (I_IXON(info->tty)) {
660 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
661 } else {
662 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
663 }
664 if (I_IXOFF(info->tty)) {
665 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
666 } else {
667 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
668 }
669 spin_unlock_irqrestore(&info->slock, flags);
670 }
671
672
673 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
674 outb(cval, info->ioaddr + UART_LCR);
675
676 return ret;
677 }
678
679 static void mxser_check_modem_status(struct mxser_port *port, int status)
680 {
681 /* update input line counters */
682 if (status & UART_MSR_TERI)
683 port->icount.rng++;
684 if (status & UART_MSR_DDSR)
685 port->icount.dsr++;
686 if (status & UART_MSR_DDCD)
687 port->icount.dcd++;
688 if (status & UART_MSR_DCTS)
689 port->icount.cts++;
690 port->mon_data.modem_status = status;
691 wake_up_interruptible(&port->delta_msr_wait);
692
693 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
694 if (status & UART_MSR_DCD)
695 wake_up_interruptible(&port->open_wait);
696 }
697
698 if (port->flags & ASYNC_CTS_FLOW) {
699 if (port->tty->hw_stopped) {
700 if (status & UART_MSR_CTS) {
701 port->tty->hw_stopped = 0;
702
703 if ((port->type != PORT_16550A) &&
704 (!port->board->chip_flag)) {
705 outb(port->IER & ~UART_IER_THRI,
706 port->ioaddr + UART_IER);
707 port->IER |= UART_IER_THRI;
708 outb(port->IER, port->ioaddr +
709 UART_IER);
710 }
711 tty_wakeup(port->tty);
712 }
713 } else {
714 if (!(status & UART_MSR_CTS)) {
715 port->tty->hw_stopped = 1;
716 if (port->type != PORT_16550A &&
717 !port->board->chip_flag) {
718 port->IER &= ~UART_IER_THRI;
719 outb(port->IER, port->ioaddr +
720 UART_IER);
721 }
722 }
723 }
724 }
725 }
726
727 static int mxser_startup(struct mxser_port *info)
728 {
729 unsigned long page;
730 unsigned long flags;
731
732 page = __get_free_page(GFP_KERNEL);
733 if (!page)
734 return -ENOMEM;
735
736 spin_lock_irqsave(&info->slock, flags);
737
738 if (info->flags & ASYNC_INITIALIZED) {
739 free_page(page);
740 spin_unlock_irqrestore(&info->slock, flags);
741 return 0;
742 }
743
744 if (!info->ioaddr || !info->type) {
745 if (info->tty)
746 set_bit(TTY_IO_ERROR, &info->tty->flags);
747 free_page(page);
748 spin_unlock_irqrestore(&info->slock, flags);
749 return 0;
750 }
751 if (info->xmit_buf)
752 free_page(page);
753 else
754 info->xmit_buf = (unsigned char *) page;
755
756 /*
757 * Clear the FIFO buffers and disable them
758 * (they will be reenabled in mxser_change_speed())
759 */
760 if (info->board->chip_flag)
761 outb((UART_FCR_CLEAR_RCVR |
762 UART_FCR_CLEAR_XMIT |
763 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
764 else
765 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
766 info->ioaddr + UART_FCR);
767
768 /*
769 * At this point there's no way the LSR could still be 0xFF;
770 * if it is, then bail out, because there's likely no UART
771 * here.
772 */
773 if (inb(info->ioaddr + UART_LSR) == 0xff) {
774 spin_unlock_irqrestore(&info->slock, flags);
775 if (capable(CAP_SYS_ADMIN)) {
776 if (info->tty)
777 set_bit(TTY_IO_ERROR, &info->tty->flags);
778 return 0;
779 } else
780 return -ENODEV;
781 }
782
783 /*
784 * Clear the interrupt registers.
785 */
786 (void) inb(info->ioaddr + UART_LSR);
787 (void) inb(info->ioaddr + UART_RX);
788 (void) inb(info->ioaddr + UART_IIR);
789 (void) inb(info->ioaddr + UART_MSR);
790
791 /*
792 * Now, initialize the UART
793 */
794 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
795 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
796 outb(info->MCR, info->ioaddr + UART_MCR);
797
798 /*
799 * Finally, enable interrupts
800 */
801 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
802
803 if (info->board->chip_flag)
804 info->IER |= MOXA_MUST_IER_EGDAI;
805 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
806
807 /*
808 * And clear the interrupt registers again for luck.
809 */
810 (void) inb(info->ioaddr + UART_LSR);
811 (void) inb(info->ioaddr + UART_RX);
812 (void) inb(info->ioaddr + UART_IIR);
813 (void) inb(info->ioaddr + UART_MSR);
814
815 if (info->tty)
816 clear_bit(TTY_IO_ERROR, &info->tty->flags);
817 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
818
819 /*
820 * and set the speed of the serial port
821 */
822 spin_unlock_irqrestore(&info->slock, flags);
823 mxser_change_speed(info, NULL);
824
825 info->flags |= ASYNC_INITIALIZED;
826 return 0;
827 }
828
829 /*
830 * This routine will shutdown a serial port; interrupts maybe disabled, and
831 * DTR is dropped if the hangup on close termio flag is on.
832 */
833 static void mxser_shutdown(struct mxser_port *info)
834 {
835 unsigned long flags;
836
837 if (!(info->flags & ASYNC_INITIALIZED))
838 return;
839
840 spin_lock_irqsave(&info->slock, flags);
841
842 /*
843 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
844 * here so the queue might never be waken up
845 */
846 wake_up_interruptible(&info->delta_msr_wait);
847
848 /*
849 * Free the IRQ, if necessary
850 */
851 if (info->xmit_buf) {
852 free_page((unsigned long) info->xmit_buf);
853 info->xmit_buf = NULL;
854 }
855
856 info->IER = 0;
857 outb(0x00, info->ioaddr + UART_IER);
858
859 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
860 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
861 outb(info->MCR, info->ioaddr + UART_MCR);
862
863 /* clear Rx/Tx FIFO's */
864 if (info->board->chip_flag)
865 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
866 MOXA_MUST_FCR_GDA_MODE_ENABLE,
867 info->ioaddr + UART_FCR);
868 else
869 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
870 info->ioaddr + UART_FCR);
871
872 /* read data port to reset things */
873 (void) inb(info->ioaddr + UART_RX);
874
875 if (info->tty)
876 set_bit(TTY_IO_ERROR, &info->tty->flags);
877
878 info->flags &= ~ASYNC_INITIALIZED;
879
880 if (info->board->chip_flag)
881 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
882
883 spin_unlock_irqrestore(&info->slock, flags);
884 }
885
886 /*
887 * This routine is called whenever a serial port is opened. It
888 * enables interrupts for a serial port, linking in its async structure into
889 * the IRQ chain. It also performs the serial-specific
890 * initialization for the tty structure.
891 */
892 static int mxser_open(struct tty_struct *tty, struct file *filp)
893 {
894 struct mxser_port *info;
895 int retval, line;
896
897 /* initialize driver_data in case something fails */
898 tty->driver_data = NULL;
899
900 line = tty->index;
901 if (line == MXSER_PORTS)
902 return 0;
903 if (line < 0 || line > MXSER_PORTS)
904 return -ENODEV;
905 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
906 if (!info->ioaddr)
907 return -ENODEV;
908
909 tty->driver_data = info;
910 info->tty = tty;
911 /*
912 * Start up serial port
913 */
914 info->count++;
915 retval = mxser_startup(info);
916 if (retval)
917 return retval;
918
919 retval = mxser_block_til_ready(tty, filp, info);
920 if (retval)
921 return retval;
922
923 /* unmark here for very high baud rate (ex. 921600 bps) used */
924 tty->low_latency = 1;
925 return 0;
926 }
927
928 /*
929 * This routine is called when the serial port gets closed. First, we
930 * wait for the last remaining data to be sent. Then, we unlink its
931 * async structure from the interrupt chain if necessary, and we free
932 * that IRQ if nothing is left in the chain.
933 */
934 static void mxser_close(struct tty_struct *tty, struct file *filp)
935 {
936 struct mxser_port *info = tty->driver_data;
937
938 unsigned long timeout;
939 unsigned long flags;
940
941 if (tty->index == MXSER_PORTS)
942 return;
943 if (!info)
944 return;
945
946 spin_lock_irqsave(&info->slock, flags);
947
948 if (tty_hung_up_p(filp)) {
949 spin_unlock_irqrestore(&info->slock, flags);
950 return;
951 }
952 if ((tty->count == 1) && (info->count != 1)) {
953 /*
954 * Uh, oh. tty->count is 1, which means that the tty
955 * structure will be freed. Info->count should always
956 * be one in these conditions. If it's greater than
957 * one, we've got real problems, since it means the
958 * serial port won't be shutdown.
959 */
960 printk(KERN_ERR "mxser_close: bad serial port count; "
961 "tty->count is 1, info->count is %d\n", info->count);
962 info->count = 1;
963 }
964 if (--info->count < 0) {
965 printk(KERN_ERR "mxser_close: bad serial port count for "
966 "ttys%d: %d\n", tty->index, info->count);
967 info->count = 0;
968 }
969 if (info->count) {
970 spin_unlock_irqrestore(&info->slock, flags);
971 return;
972 }
973 info->flags |= ASYNC_CLOSING;
974 spin_unlock_irqrestore(&info->slock, flags);
975 /*
976 * Save the termios structure, since this port may have
977 * separate termios for callout and dialin.
978 */
979 if (info->flags & ASYNC_NORMAL_ACTIVE)
980 info->normal_termios = *tty->termios;
981 /*
982 * Now we wait for the transmit buffer to clear; and we notify
983 * the line discipline to only process XON/XOFF characters.
984 */
985 tty->closing = 1;
986 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
987 tty_wait_until_sent(tty, info->closing_wait);
988 /*
989 * At this point we stop accepting input. To do this, we
990 * disable the receive line status interrupts, and tell the
991 * interrupt driver to stop checking the data ready bit in the
992 * line status register.
993 */
994 info->IER &= ~UART_IER_RLSI;
995 if (info->board->chip_flag)
996 info->IER &= ~MOXA_MUST_RECV_ISR;
997
998 if (info->flags & ASYNC_INITIALIZED) {
999 outb(info->IER, info->ioaddr + UART_IER);
1000 /*
1001 * Before we drop DTR, make sure the UART transmitter
1002 * has completely drained; this is especially
1003 * important if there is a transmit FIFO!
1004 */
1005 timeout = jiffies + HZ;
1006 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1007 schedule_timeout_interruptible(5);
1008 if (time_after(jiffies, timeout))
1009 break;
1010 }
1011 }
1012 mxser_shutdown(info);
1013
1014 if (tty->driver->flush_buffer)
1015 tty->driver->flush_buffer(tty);
1016
1017 tty_ldisc_flush(tty);
1018
1019 tty->closing = 0;
1020 info->event = 0;
1021 info->tty = NULL;
1022 if (info->blocked_open) {
1023 if (info->close_delay)
1024 schedule_timeout_interruptible(info->close_delay);
1025 wake_up_interruptible(&info->open_wait);
1026 }
1027
1028 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1029 }
1030
1031 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1032 {
1033 int c, total = 0;
1034 struct mxser_port *info = tty->driver_data;
1035 unsigned long flags;
1036
1037 if (!info->xmit_buf)
1038 return 0;
1039
1040 while (1) {
1041 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1042 SERIAL_XMIT_SIZE - info->xmit_head));
1043 if (c <= 0)
1044 break;
1045
1046 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1047 spin_lock_irqsave(&info->slock, flags);
1048 info->xmit_head = (info->xmit_head + c) &
1049 (SERIAL_XMIT_SIZE - 1);
1050 info->xmit_cnt += c;
1051 spin_unlock_irqrestore(&info->slock, flags);
1052
1053 buf += c;
1054 count -= c;
1055 total += c;
1056 }
1057
1058 if (info->xmit_cnt && !tty->stopped) {
1059 if (!tty->hw_stopped ||
1060 (info->type == PORT_16550A) ||
1061 (info->board->chip_flag)) {
1062 spin_lock_irqsave(&info->slock, flags);
1063 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1064 UART_IER);
1065 info->IER |= UART_IER_THRI;
1066 outb(info->IER, info->ioaddr + UART_IER);
1067 spin_unlock_irqrestore(&info->slock, flags);
1068 }
1069 }
1070 return total;
1071 }
1072
1073 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1074 {
1075 struct mxser_port *info = tty->driver_data;
1076 unsigned long flags;
1077
1078 if (!info->xmit_buf)
1079 return;
1080
1081 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1082 return;
1083
1084 spin_lock_irqsave(&info->slock, flags);
1085 info->xmit_buf[info->xmit_head++] = ch;
1086 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1087 info->xmit_cnt++;
1088 spin_unlock_irqrestore(&info->slock, flags);
1089 if (!tty->stopped) {
1090 if (!tty->hw_stopped ||
1091 (info->type == PORT_16550A) ||
1092 info->board->chip_flag) {
1093 spin_lock_irqsave(&info->slock, flags);
1094 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1095 info->IER |= UART_IER_THRI;
1096 outb(info->IER, info->ioaddr + UART_IER);
1097 spin_unlock_irqrestore(&info->slock, flags);
1098 }
1099 }
1100 }
1101
1102
1103 static void mxser_flush_chars(struct tty_struct *tty)
1104 {
1105 struct mxser_port *info = tty->driver_data;
1106 unsigned long flags;
1107
1108 if (info->xmit_cnt <= 0 ||
1109 tty->stopped ||
1110 !info->xmit_buf ||
1111 (tty->hw_stopped &&
1112 (info->type != PORT_16550A) &&
1113 (!info->board->chip_flag)
1114 ))
1115 return;
1116
1117 spin_lock_irqsave(&info->slock, flags);
1118
1119 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1120 info->IER |= UART_IER_THRI;
1121 outb(info->IER, info->ioaddr + UART_IER);
1122
1123 spin_unlock_irqrestore(&info->slock, flags);
1124 }
1125
1126 static int mxser_write_room(struct tty_struct *tty)
1127 {
1128 struct mxser_port *info = tty->driver_data;
1129 int ret;
1130
1131 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1132 if (ret < 0)
1133 ret = 0;
1134 return ret;
1135 }
1136
1137 static int mxser_chars_in_buffer(struct tty_struct *tty)
1138 {
1139 struct mxser_port *info = tty->driver_data;
1140 return info->xmit_cnt;
1141 }
1142
1143 static void mxser_flush_buffer(struct tty_struct *tty)
1144 {
1145 struct mxser_port *info = tty->driver_data;
1146 char fcr;
1147 unsigned long flags;
1148
1149
1150 spin_lock_irqsave(&info->slock, flags);
1151 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1152
1153 fcr = inb(info->ioaddr + UART_FCR);
1154 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1155 info->ioaddr + UART_FCR);
1156 outb(fcr, info->ioaddr + UART_FCR);
1157
1158 spin_unlock_irqrestore(&info->slock, flags);
1159
1160 tty_wakeup(tty);
1161 }
1162
1163 /*
1164 * ------------------------------------------------------------
1165 * friends of mxser_ioctl()
1166 * ------------------------------------------------------------
1167 */
1168 static int mxser_get_serial_info(struct mxser_port *info,
1169 struct serial_struct __user *retinfo)
1170 {
1171 struct serial_struct tmp;
1172
1173 if (!retinfo)
1174 return -EFAULT;
1175 memset(&tmp, 0, sizeof(tmp));
1176 tmp.type = info->type;
1177 tmp.line = info->tty->index;
1178 tmp.port = info->ioaddr;
1179 tmp.irq = info->board->irq;
1180 tmp.flags = info->flags;
1181 tmp.baud_base = info->baud_base;
1182 tmp.close_delay = info->close_delay;
1183 tmp.closing_wait = info->closing_wait;
1184 tmp.custom_divisor = info->custom_divisor;
1185 tmp.hub6 = 0;
1186 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1187 return -EFAULT;
1188 return 0;
1189 }
1190
1191 static int mxser_set_serial_info(struct mxser_port *info,
1192 struct serial_struct __user *new_info)
1193 {
1194 struct serial_struct new_serial;
1195 unsigned int flags;
1196 int retval = 0;
1197
1198 if (!new_info || !info->ioaddr)
1199 return -EFAULT;
1200 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1201 return -EFAULT;
1202
1203 if ((new_serial.irq != info->board->irq) ||
1204 (new_serial.port != info->ioaddr) ||
1205 (new_serial.custom_divisor != info->custom_divisor) ||
1206 (new_serial.baud_base != info->baud_base))
1207 return -EPERM;
1208
1209 flags = info->flags & ASYNC_SPD_MASK;
1210
1211 if (!capable(CAP_SYS_ADMIN)) {
1212 if ((new_serial.baud_base != info->baud_base) ||
1213 (new_serial.close_delay != info->close_delay) ||
1214 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1215 return -EPERM;
1216 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1217 (new_serial.flags & ASYNC_USR_MASK));
1218 } else {
1219 /*
1220 * OK, past this point, all the error checking has been done.
1221 * At this point, we start making changes.....
1222 */
1223 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1224 (new_serial.flags & ASYNC_FLAGS));
1225 info->close_delay = new_serial.close_delay * HZ / 100;
1226 info->closing_wait = new_serial.closing_wait * HZ / 100;
1227 info->tty->low_latency =
1228 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1229 info->tty->low_latency = 0;
1230 }
1231
1232 info->type = new_serial.type;
1233
1234 process_txrx_fifo(info);
1235
1236 if (info->flags & ASYNC_INITIALIZED) {
1237 if (flags != (info->flags & ASYNC_SPD_MASK))
1238 mxser_change_speed(info, NULL);
1239 } else
1240 retval = mxser_startup(info);
1241
1242 return retval;
1243 }
1244
1245 /*
1246 * mxser_get_lsr_info - get line status register info
1247 *
1248 * Purpose: Let user call ioctl() to get info when the UART physically
1249 * is emptied. On bus types like RS485, the transmitter must
1250 * release the bus after transmitting. This must be done when
1251 * the transmit shift register is empty, not be done when the
1252 * transmit holding register is empty. This functionality
1253 * allows an RS485 driver to be written in user space.
1254 */
1255 static int mxser_get_lsr_info(struct mxser_port *info,
1256 unsigned int __user *value)
1257 {
1258 unsigned char status;
1259 unsigned int result;
1260 unsigned long flags;
1261
1262 spin_lock_irqsave(&info->slock, flags);
1263 status = inb(info->ioaddr + UART_LSR);
1264 spin_unlock_irqrestore(&info->slock, flags);
1265 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1266 return put_user(result, value);
1267 }
1268
1269 /*
1270 * This routine sends a break character out the serial port.
1271 */
1272 static void mxser_send_break(struct mxser_port *info, int duration)
1273 {
1274 unsigned long flags;
1275
1276 if (!info->ioaddr)
1277 return;
1278 set_current_state(TASK_INTERRUPTIBLE);
1279 spin_lock_irqsave(&info->slock, flags);
1280 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1281 info->ioaddr + UART_LCR);
1282 spin_unlock_irqrestore(&info->slock, flags);
1283 schedule_timeout(duration);
1284 spin_lock_irqsave(&info->slock, flags);
1285 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1286 info->ioaddr + UART_LCR);
1287 spin_unlock_irqrestore(&info->slock, flags);
1288 }
1289
1290 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1291 {
1292 struct mxser_port *info = tty->driver_data;
1293 unsigned char control, status;
1294 unsigned long flags;
1295
1296
1297 if (tty->index == MXSER_PORTS)
1298 return -ENOIOCTLCMD;
1299 if (test_bit(TTY_IO_ERROR, &tty->flags))
1300 return -EIO;
1301
1302 control = info->MCR;
1303
1304 spin_lock_irqsave(&info->slock, flags);
1305 status = inb(info->ioaddr + UART_MSR);
1306 if (status & UART_MSR_ANY_DELTA)
1307 mxser_check_modem_status(info, status);
1308 spin_unlock_irqrestore(&info->slock, flags);
1309 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1310 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1311 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1312 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1313 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1314 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1315 }
1316
1317 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1318 unsigned int set, unsigned int clear)
1319 {
1320 struct mxser_port *info = tty->driver_data;
1321 unsigned long flags;
1322
1323
1324 if (tty->index == MXSER_PORTS)
1325 return -ENOIOCTLCMD;
1326 if (test_bit(TTY_IO_ERROR, &tty->flags))
1327 return -EIO;
1328
1329 spin_lock_irqsave(&info->slock, flags);
1330
1331 if (set & TIOCM_RTS)
1332 info->MCR |= UART_MCR_RTS;
1333 if (set & TIOCM_DTR)
1334 info->MCR |= UART_MCR_DTR;
1335
1336 if (clear & TIOCM_RTS)
1337 info->MCR &= ~UART_MCR_RTS;
1338 if (clear & TIOCM_DTR)
1339 info->MCR &= ~UART_MCR_DTR;
1340
1341 outb(info->MCR, info->ioaddr + UART_MCR);
1342 spin_unlock_irqrestore(&info->slock, flags);
1343 return 0;
1344 }
1345
1346 static int __init mxser_program_mode(int port)
1347 {
1348 int id, i, j, n;
1349
1350 outb(0, port);
1351 outb(0, port);
1352 outb(0, port);
1353 (void)inb(port);
1354 (void)inb(port);
1355 outb(0, port);
1356 (void)inb(port);
1357
1358 id = inb(port + 1) & 0x1F;
1359 if ((id != C168_ASIC_ID) &&
1360 (id != C104_ASIC_ID) &&
1361 (id != C102_ASIC_ID) &&
1362 (id != CI132_ASIC_ID) &&
1363 (id != CI134_ASIC_ID) &&
1364 (id != CI104J_ASIC_ID))
1365 return -1;
1366 for (i = 0, j = 0; i < 4; i++) {
1367 n = inb(port + 2);
1368 if (n == 'M') {
1369 j = 1;
1370 } else if ((j == 1) && (n == 1)) {
1371 j = 2;
1372 break;
1373 } else
1374 j = 0;
1375 }
1376 if (j != 2)
1377 id = -2;
1378 return id;
1379 }
1380
1381 static void __init mxser_normal_mode(int port)
1382 {
1383 int i, n;
1384
1385 outb(0xA5, port + 1);
1386 outb(0x80, port + 3);
1387 outb(12, port + 0); /* 9600 bps */
1388 outb(0, port + 1);
1389 outb(0x03, port + 3); /* 8 data bits */
1390 outb(0x13, port + 4); /* loop back mode */
1391 for (i = 0; i < 16; i++) {
1392 n = inb(port + 5);
1393 if ((n & 0x61) == 0x60)
1394 break;
1395 if ((n & 1) == 1)
1396 (void)inb(port);
1397 }
1398 outb(0x00, port + 4);
1399 }
1400
1401 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1402 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1403 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1404 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1405 #define EN_CCMD 0x000 /* Chip's command register */
1406 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1407 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1408 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1409 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1410 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1411 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1412 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1413 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1414 static int __init mxser_read_register(int port, unsigned short *regs)
1415 {
1416 int i, k, value, id;
1417 unsigned int j;
1418
1419 id = mxser_program_mode(port);
1420 if (id < 0)
1421 return id;
1422 for (i = 0; i < 14; i++) {
1423 k = (i & 0x3F) | 0x180;
1424 for (j = 0x100; j > 0; j >>= 1) {
1425 outb(CHIP_CS, port);
1426 if (k & j) {
1427 outb(CHIP_CS | CHIP_DO, port);
1428 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1429 } else {
1430 outb(CHIP_CS, port);
1431 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1432 }
1433 }
1434 (void)inb(port);
1435 value = 0;
1436 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1437 outb(CHIP_CS, port);
1438 outb(CHIP_CS | CHIP_SK, port);
1439 if (inb(port) & CHIP_DI)
1440 value |= j;
1441 }
1442 regs[i] = value;
1443 outb(0, port);
1444 }
1445 mxser_normal_mode(port);
1446 return id;
1447 }
1448
1449 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1450 {
1451 struct mxser_port *port;
1452 int result, status;
1453 unsigned int i, j;
1454
1455 switch (cmd) {
1456 case MOXA_GET_CONF:
1457 /* if (copy_to_user(argp, mxsercfg,
1458 sizeof(struct mxser_hwconf) * 4))
1459 return -EFAULT;
1460 return 0;*/
1461 return -ENXIO;
1462 case MOXA_GET_MAJOR:
1463 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1464 return -EFAULT;
1465 return 0;
1466
1467 case MOXA_GET_CUMAJOR:
1468 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1469 return -EFAULT;
1470 return 0;
1471
1472 case MOXA_CHKPORTENABLE:
1473 result = 0;
1474
1475 for (i = 0; i < MXSER_BOARDS; i++)
1476 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1477 if (mxser_boards[i].ports[j].ioaddr)
1478 result |= (1 << i);
1479
1480 return put_user(result, (unsigned long __user *)argp);
1481 case MOXA_GETDATACOUNT:
1482 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1483 return -EFAULT;
1484 return 0;
1485 case MOXA_GETMSTATUS:
1486 for (i = 0; i < MXSER_BOARDS; i++)
1487 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1488 port = &mxser_boards[i].ports[j];
1489
1490 GMStatus[i].ri = 0;
1491 if (!port->ioaddr) {
1492 GMStatus[i].dcd = 0;
1493 GMStatus[i].dsr = 0;
1494 GMStatus[i].cts = 0;
1495 continue;
1496 }
1497
1498 if (!port->tty || !port->tty->termios)
1499 GMStatus[i].cflag =
1500 port->normal_termios.c_cflag;
1501 else
1502 GMStatus[i].cflag =
1503 port->tty->termios->c_cflag;
1504
1505 status = inb(port->ioaddr + UART_MSR);
1506 if (status & 0x80 /*UART_MSR_DCD */ )
1507 GMStatus[i].dcd = 1;
1508 else
1509 GMStatus[i].dcd = 0;
1510
1511 if (status & 0x20 /*UART_MSR_DSR */ )
1512 GMStatus[i].dsr = 1;
1513 else
1514 GMStatus[i].dsr = 0;
1515
1516
1517 if (status & 0x10 /*UART_MSR_CTS */ )
1518 GMStatus[i].cts = 1;
1519 else
1520 GMStatus[i].cts = 0;
1521 }
1522 if (copy_to_user(argp, GMStatus,
1523 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1524 return -EFAULT;
1525 return 0;
1526 case MOXA_ASPP_MON_EXT: {
1527 int status, p, shiftbit;
1528 unsigned long opmode;
1529 unsigned cflag, iflag;
1530
1531 for (i = 0; i < MXSER_BOARDS; i++)
1532 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1533 port = &mxser_boards[i].ports[j];
1534 if (!port->ioaddr)
1535 continue;
1536
1537 status = mxser_get_msr(port->ioaddr, 0, i);
1538
1539 if (status & UART_MSR_TERI)
1540 port->icount.rng++;
1541 if (status & UART_MSR_DDSR)
1542 port->icount.dsr++;
1543 if (status & UART_MSR_DDCD)
1544 port->icount.dcd++;
1545 if (status & UART_MSR_DCTS)
1546 port->icount.cts++;
1547
1548 port->mon_data.modem_status = status;
1549 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1550 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1551 mon_data_ext.up_rxcnt[i] =
1552 port->mon_data.up_rxcnt;
1553 mon_data_ext.up_txcnt[i] =
1554 port->mon_data.up_txcnt;
1555 mon_data_ext.modem_status[i] =
1556 port->mon_data.modem_status;
1557 mon_data_ext.baudrate[i] = port->realbaud;
1558
1559 if (!port->tty || !port->tty->termios) {
1560 cflag = port->normal_termios.c_cflag;
1561 iflag = port->normal_termios.c_iflag;
1562 } else {
1563 cflag = port->tty->termios->c_cflag;
1564 iflag = port->tty->termios->c_iflag;
1565 }
1566
1567 mon_data_ext.databits[i] = cflag & CSIZE;
1568
1569 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1570
1571 mon_data_ext.parity[i] =
1572 cflag & (PARENB | PARODD | CMSPAR);
1573
1574 mon_data_ext.flowctrl[i] = 0x00;
1575
1576 if (cflag & CRTSCTS)
1577 mon_data_ext.flowctrl[i] |= 0x03;
1578
1579 if (iflag & (IXON | IXOFF))
1580 mon_data_ext.flowctrl[i] |= 0x0C;
1581
1582 if (port->type == PORT_16550A)
1583 mon_data_ext.fifo[i] = 1;
1584 else
1585 mon_data_ext.fifo[i] = 0;
1586
1587 p = i % 4;
1588 shiftbit = p * 2;
1589 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1590 opmode &= OP_MODE_MASK;
1591
1592 mon_data_ext.iftype[i] = opmode;
1593
1594 }
1595 if (copy_to_user(argp, &mon_data_ext,
1596 sizeof(mon_data_ext)))
1597 return -EFAULT;
1598
1599 return 0;
1600
1601 } default:
1602 return -ENOIOCTLCMD;
1603 }
1604 return 0;
1605 }
1606
1607 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1608 unsigned int cmd, unsigned long arg)
1609 {
1610 struct mxser_port *info = tty->driver_data;
1611 struct async_icount cprev, cnow; /* kernel counter temps */
1612 struct serial_icounter_struct __user *p_cuser;
1613 unsigned long templ;
1614 unsigned long flags;
1615 void __user *argp = (void __user *)arg;
1616 int retval;
1617
1618 if (tty->index == MXSER_PORTS)
1619 return mxser_ioctl_special(cmd, argp);
1620
1621 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1622 int p;
1623 unsigned long opmode;
1624 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1625 int shiftbit;
1626 unsigned char val, mask;
1627
1628 p = tty->index % 4;
1629 if (cmd == MOXA_SET_OP_MODE) {
1630 if (get_user(opmode, (int __user *) argp))
1631 return -EFAULT;
1632 if (opmode != RS232_MODE &&
1633 opmode != RS485_2WIRE_MODE &&
1634 opmode != RS422_MODE &&
1635 opmode != RS485_4WIRE_MODE)
1636 return -EFAULT;
1637 mask = ModeMask[p];
1638 shiftbit = p * 2;
1639 val = inb(info->opmode_ioaddr);
1640 val &= mask;
1641 val |= (opmode << shiftbit);
1642 outb(val, info->opmode_ioaddr);
1643 } else {
1644 shiftbit = p * 2;
1645 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1646 opmode &= OP_MODE_MASK;
1647 if (copy_to_user(argp, &opmode, sizeof(int)))
1648 return -EFAULT;
1649 }
1650 return 0;
1651 }
1652
1653 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1654 test_bit(TTY_IO_ERROR, &tty->flags))
1655 return -EIO;
1656
1657 switch (cmd) {
1658 case TCSBRK: /* SVID version: non-zero arg --> no break */
1659 retval = tty_check_change(tty);
1660 if (retval)
1661 return retval;
1662 tty_wait_until_sent(tty, 0);
1663 if (!arg)
1664 mxser_send_break(info, HZ / 4); /* 1/4 second */
1665 return 0;
1666 case TCSBRKP: /* support for POSIX tcsendbreak() */
1667 retval = tty_check_change(tty);
1668 if (retval)
1669 return retval;
1670 tty_wait_until_sent(tty, 0);
1671 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1672 return 0;
1673 case TIOCGSOFTCAR:
1674 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1675 case TIOCSSOFTCAR:
1676 if (get_user(templ, (unsigned long __user *) argp))
1677 return -EFAULT;
1678 arg = templ;
1679 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1680 return 0;
1681 case TIOCGSERIAL:
1682 return mxser_get_serial_info(info, argp);
1683 case TIOCSSERIAL:
1684 return mxser_set_serial_info(info, argp);
1685 case TIOCSERGETLSR: /* Get line status register */
1686 return mxser_get_lsr_info(info, argp);
1687 /*
1688 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1689 * - mask passed in arg for lines of interest
1690 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1691 * Caller should use TIOCGICOUNT to see which one it was
1692 */
1693 case TIOCMIWAIT: {
1694 DECLARE_WAITQUEUE(wait, current);
1695 int ret;
1696 spin_lock_irqsave(&info->slock, flags);
1697 cprev = info->icount; /* note the counters on entry */
1698 spin_unlock_irqrestore(&info->slock, flags);
1699
1700 add_wait_queue(&info->delta_msr_wait, &wait);
1701 while (1) {
1702 spin_lock_irqsave(&info->slock, flags);
1703 cnow = info->icount; /* atomic copy */
1704 spin_unlock_irqrestore(&info->slock, flags);
1705
1706 set_current_state(TASK_INTERRUPTIBLE);
1707 if (((arg & TIOCM_RNG) &&
1708 (cnow.rng != cprev.rng)) ||
1709 ((arg & TIOCM_DSR) &&
1710 (cnow.dsr != cprev.dsr)) ||
1711 ((arg & TIOCM_CD) &&
1712 (cnow.dcd != cprev.dcd)) ||
1713 ((arg & TIOCM_CTS) &&
1714 (cnow.cts != cprev.cts))) {
1715 ret = 0;
1716 break;
1717 }
1718 /* see if a signal did it */
1719 if (signal_pending(current)) {
1720 ret = -ERESTARTSYS;
1721 break;
1722 }
1723 cprev = cnow;
1724 }
1725 current->state = TASK_RUNNING;
1726 remove_wait_queue(&info->delta_msr_wait, &wait);
1727 break;
1728 }
1729 /* NOTREACHED */
1730 /*
1731 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1732 * Return: write counters to the user passed counter struct
1733 * NB: both 1->0 and 0->1 transitions are counted except for
1734 * RI where only 0->1 is counted.
1735 */
1736 case TIOCGICOUNT:
1737 spin_lock_irqsave(&info->slock, flags);
1738 cnow = info->icount;
1739 spin_unlock_irqrestore(&info->slock, flags);
1740 p_cuser = argp;
1741 if (put_user(cnow.frame, &p_cuser->frame))
1742 return -EFAULT;
1743 if (put_user(cnow.brk, &p_cuser->brk))
1744 return -EFAULT;
1745 if (put_user(cnow.overrun, &p_cuser->overrun))
1746 return -EFAULT;
1747 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1748 return -EFAULT;
1749 if (put_user(cnow.parity, &p_cuser->parity))
1750 return -EFAULT;
1751 if (put_user(cnow.rx, &p_cuser->rx))
1752 return -EFAULT;
1753 if (put_user(cnow.tx, &p_cuser->tx))
1754 return -EFAULT;
1755 put_user(cnow.cts, &p_cuser->cts);
1756 put_user(cnow.dsr, &p_cuser->dsr);
1757 put_user(cnow.rng, &p_cuser->rng);
1758 put_user(cnow.dcd, &p_cuser->dcd);
1759 return 0;
1760 case MOXA_HighSpeedOn:
1761 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1762 case MOXA_SDS_RSTICOUNTER:
1763 info->mon_data.rxcnt = 0;
1764 info->mon_data.txcnt = 0;
1765 return 0;
1766 case MOXA_ASPP_SETBAUD:{
1767 long baud;
1768 if (get_user(baud, (long __user *)argp))
1769 return -EFAULT;
1770 mxser_set_baud(info, baud);
1771 return 0;
1772 }
1773 case MOXA_ASPP_GETBAUD:
1774 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1775 return -EFAULT;
1776
1777 return 0;
1778
1779 case MOXA_ASPP_OQUEUE:{
1780 int len, lsr;
1781
1782 len = mxser_chars_in_buffer(tty);
1783
1784 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1785
1786 len += (lsr ? 0 : 1);
1787
1788 if (copy_to_user(argp, &len, sizeof(int)))
1789 return -EFAULT;
1790
1791 return 0;
1792 }
1793 case MOXA_ASPP_MON: {
1794 int mcr, status;
1795
1796 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1797 mxser_check_modem_status(info, status);
1798
1799 mcr = inb(info->ioaddr + UART_MCR);
1800 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1801 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1802 else
1803 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1804
1805 if (mcr & MOXA_MUST_MCR_TX_XON)
1806 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1807 else
1808 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1809
1810 if (info->tty->hw_stopped)
1811 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1812 else
1813 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1814
1815 if (copy_to_user(argp, &info->mon_data,
1816 sizeof(struct mxser_mon)))
1817 return -EFAULT;
1818
1819 return 0;
1820 }
1821 case MOXA_ASPP_LSTATUS: {
1822 if (copy_to_user(argp, &info->err_shadow,
1823 sizeof(unsigned char)))
1824 return -EFAULT;
1825
1826 info->err_shadow = 0;
1827 return 0;
1828 }
1829 case MOXA_SET_BAUD_METHOD: {
1830 int method;
1831
1832 if (get_user(method, (int __user *)argp))
1833 return -EFAULT;
1834 mxser_set_baud_method[tty->index] = method;
1835 if (copy_to_user(argp, &method, sizeof(int)))
1836 return -EFAULT;
1837
1838 return 0;
1839 }
1840 default:
1841 return -ENOIOCTLCMD;
1842 }
1843 return 0;
1844 }
1845
1846 static void mxser_stoprx(struct tty_struct *tty)
1847 {
1848 struct mxser_port *info = tty->driver_data;
1849
1850 info->ldisc_stop_rx = 1;
1851 if (I_IXOFF(tty)) {
1852 if (info->board->chip_flag) {
1853 info->IER &= ~MOXA_MUST_RECV_ISR;
1854 outb(info->IER, info->ioaddr + UART_IER);
1855 } else {
1856 info->x_char = STOP_CHAR(tty);
1857 outb(0, info->ioaddr + UART_IER);
1858 info->IER |= UART_IER_THRI;
1859 outb(info->IER, info->ioaddr + UART_IER);
1860 }
1861 }
1862
1863 if (info->tty->termios->c_cflag & CRTSCTS) {
1864 info->MCR &= ~UART_MCR_RTS;
1865 outb(info->MCR, info->ioaddr + UART_MCR);
1866 }
1867 }
1868
1869 /*
1870 * This routine is called by the upper-layer tty layer to signal that
1871 * incoming characters should be throttled.
1872 */
1873 static void mxser_throttle(struct tty_struct *tty)
1874 {
1875 mxser_stoprx(tty);
1876 }
1877
1878 static void mxser_unthrottle(struct tty_struct *tty)
1879 {
1880 struct mxser_port *info = tty->driver_data;
1881
1882 /* startrx */
1883 info->ldisc_stop_rx = 0;
1884 if (I_IXOFF(tty)) {
1885 if (info->x_char)
1886 info->x_char = 0;
1887 else {
1888 if (info->board->chip_flag) {
1889 info->IER |= MOXA_MUST_RECV_ISR;
1890 outb(info->IER, info->ioaddr + UART_IER);
1891 } else {
1892 info->x_char = START_CHAR(tty);
1893 outb(0, info->ioaddr + UART_IER);
1894 info->IER |= UART_IER_THRI;
1895 outb(info->IER, info->ioaddr + UART_IER);
1896 }
1897 }
1898 }
1899
1900 if (info->tty->termios->c_cflag & CRTSCTS) {
1901 info->MCR |= UART_MCR_RTS;
1902 outb(info->MCR, info->ioaddr + UART_MCR);
1903 }
1904 }
1905
1906 /*
1907 * mxser_stop() and mxser_start()
1908 *
1909 * This routines are called before setting or resetting tty->stopped.
1910 * They enable or disable transmitter interrupts, as necessary.
1911 */
1912 static void mxser_stop(struct tty_struct *tty)
1913 {
1914 struct mxser_port *info = tty->driver_data;
1915 unsigned long flags;
1916
1917 spin_lock_irqsave(&info->slock, flags);
1918 if (info->IER & UART_IER_THRI) {
1919 info->IER &= ~UART_IER_THRI;
1920 outb(info->IER, info->ioaddr + UART_IER);
1921 }
1922 spin_unlock_irqrestore(&info->slock, flags);
1923 }
1924
1925 static void mxser_start(struct tty_struct *tty)
1926 {
1927 struct mxser_port *info = tty->driver_data;
1928 unsigned long flags;
1929
1930 spin_lock_irqsave(&info->slock, flags);
1931 if (info->xmit_cnt && info->xmit_buf) {
1932 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1933 info->IER |= UART_IER_THRI;
1934 outb(info->IER, info->ioaddr + UART_IER);
1935 }
1936 spin_unlock_irqrestore(&info->slock, flags);
1937 }
1938
1939 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1940 {
1941 struct mxser_port *info = tty->driver_data;
1942 unsigned long flags;
1943
1944 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1945 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1946
1947 mxser_change_speed(info, old_termios);
1948
1949 if ((old_termios->c_cflag & CRTSCTS) &&
1950 !(tty->termios->c_cflag & CRTSCTS)) {
1951 tty->hw_stopped = 0;
1952 mxser_start(tty);
1953 }
1954 }
1955
1956 /* Handle sw stopped */
1957 if ((old_termios->c_iflag & IXON) &&
1958 !(tty->termios->c_iflag & IXON)) {
1959 tty->stopped = 0;
1960
1961 if (info->board->chip_flag) {
1962 spin_lock_irqsave(&info->slock, flags);
1963 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1964 spin_unlock_irqrestore(&info->slock, flags);
1965 }
1966
1967 mxser_start(tty);
1968 }
1969 }
1970
1971 /*
1972 * mxser_wait_until_sent() --- wait until the transmitter is empty
1973 */
1974 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1975 {
1976 struct mxser_port *info = tty->driver_data;
1977 unsigned long orig_jiffies, char_time;
1978 int lsr;
1979
1980 if (info->type == PORT_UNKNOWN)
1981 return;
1982
1983 if (info->xmit_fifo_size == 0)
1984 return; /* Just in case.... */
1985
1986 orig_jiffies = jiffies;
1987 /*
1988 * Set the check interval to be 1/5 of the estimated time to
1989 * send a single character, and make it at least 1. The check
1990 * interval should also be less than the timeout.
1991 *
1992 * Note: we have to use pretty tight timings here to satisfy
1993 * the NIST-PCTS.
1994 */
1995 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1996 char_time = char_time / 5;
1997 if (char_time == 0)
1998 char_time = 1;
1999 if (timeout && timeout < char_time)
2000 char_time = timeout;
2001 /*
2002 * If the transmitter hasn't cleared in twice the approximate
2003 * amount of time to send the entire FIFO, it probably won't
2004 * ever clear. This assumes the UART isn't doing flow
2005 * control, which is currently the case. Hence, if it ever
2006 * takes longer than info->timeout, this is probably due to a
2007 * UART bug of some kind. So, we clamp the timeout parameter at
2008 * 2*info->timeout.
2009 */
2010 if (!timeout || timeout > 2 * info->timeout)
2011 timeout = 2 * info->timeout;
2012 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2013 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2014 timeout, char_time);
2015 printk("jiff=%lu...", jiffies);
2016 #endif
2017 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2018 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2019 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2020 #endif
2021 schedule_timeout_interruptible(char_time);
2022 if (signal_pending(current))
2023 break;
2024 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2025 break;
2026 }
2027 set_current_state(TASK_RUNNING);
2028
2029 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2030 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2031 #endif
2032 }
2033
2034 /*
2035 * This routine is called by tty_hangup() when a hangup is signaled.
2036 */
2037 static void mxser_hangup(struct tty_struct *tty)
2038 {
2039 struct mxser_port *info = tty->driver_data;
2040
2041 mxser_flush_buffer(tty);
2042 mxser_shutdown(info);
2043 info->event = 0;
2044 info->count = 0;
2045 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2046 info->tty = NULL;
2047 wake_up_interruptible(&info->open_wait);
2048 }
2049
2050 /*
2051 * mxser_rs_break() --- routine which turns the break handling on or off
2052 */
2053 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2054 {
2055 struct mxser_port *info = tty->driver_data;
2056 unsigned long flags;
2057
2058 spin_lock_irqsave(&info->slock, flags);
2059 if (break_state == -1)
2060 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2061 info->ioaddr + UART_LCR);
2062 else
2063 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2064 info->ioaddr + UART_LCR);
2065 spin_unlock_irqrestore(&info->slock, flags);
2066 }
2067
2068 static void mxser_receive_chars(struct mxser_port *port, int *status)
2069 {
2070 struct tty_struct *tty = port->tty;
2071 unsigned char ch, gdl;
2072 int ignored = 0;
2073 int cnt = 0;
2074 int recv_room;
2075 int max = 256;
2076 unsigned long flags;
2077
2078 spin_lock_irqsave(&port->slock, flags);
2079
2080 recv_room = tty->receive_room;
2081 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2082 mxser_stoprx(tty);
2083
2084 if (port->board->chip_flag != MOXA_OTHER_UART) {
2085
2086 if (*status & UART_LSR_SPECIAL)
2087 goto intr_old;
2088 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2089 (*status & MOXA_MUST_LSR_RERR))
2090 goto intr_old;
2091 if (*status & MOXA_MUST_LSR_RERR)
2092 goto intr_old;
2093
2094 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2095
2096 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2097 gdl &= MOXA_MUST_GDL_MASK;
2098 if (gdl >= recv_room) {
2099 if (!port->ldisc_stop_rx)
2100 mxser_stoprx(tty);
2101 }
2102 while (gdl--) {
2103 ch = inb(port->ioaddr + UART_RX);
2104 tty_insert_flip_char(tty, ch, 0);
2105 cnt++;
2106 }
2107 goto end_intr;
2108 }
2109 intr_old:
2110
2111 do {
2112 if (max-- < 0)
2113 break;
2114
2115 ch = inb(port->ioaddr + UART_RX);
2116 if (port->board->chip_flag && (*status & UART_LSR_OE))
2117 outb(0x23, port->ioaddr + UART_FCR);
2118 *status &= port->read_status_mask;
2119 if (*status & port->ignore_status_mask) {
2120 if (++ignored > 100)
2121 break;
2122 } else {
2123 char flag = 0;
2124 if (*status & UART_LSR_SPECIAL) {
2125 if (*status & UART_LSR_BI) {
2126 flag = TTY_BREAK;
2127 port->icount.brk++;
2128
2129 if (port->flags & ASYNC_SAK)
2130 do_SAK(tty);
2131 } else if (*status & UART_LSR_PE) {
2132 flag = TTY_PARITY;
2133 port->icount.parity++;
2134 } else if (*status & UART_LSR_FE) {
2135 flag = TTY_FRAME;
2136 port->icount.frame++;
2137 } else if (*status & UART_LSR_OE) {
2138 flag = TTY_OVERRUN;
2139 port->icount.overrun++;
2140 }
2141 }
2142 tty_insert_flip_char(tty, ch, flag);
2143 cnt++;
2144 if (cnt >= recv_room) {
2145 if (!port->ldisc_stop_rx)
2146 mxser_stoprx(tty);
2147 break;
2148 }
2149
2150 }
2151
2152 if (port->board->chip_flag)
2153 break;
2154
2155 *status = inb(port->ioaddr + UART_LSR);
2156 } while (*status & UART_LSR_DR);
2157
2158 end_intr:
2159 mxvar_log.rxcnt[port->tty->index] += cnt;
2160 port->mon_data.rxcnt += cnt;
2161 port->mon_data.up_rxcnt += cnt;
2162 spin_unlock_irqrestore(&port->slock, flags);
2163
2164 tty_flip_buffer_push(tty);
2165 }
2166
2167 static void mxser_transmit_chars(struct mxser_port *port)
2168 {
2169 int count, cnt;
2170 unsigned long flags;
2171
2172 spin_lock_irqsave(&port->slock, flags);
2173
2174 if (port->x_char) {
2175 outb(port->x_char, port->ioaddr + UART_TX);
2176 port->x_char = 0;
2177 mxvar_log.txcnt[port->tty->index]++;
2178 port->mon_data.txcnt++;
2179 port->mon_data.up_txcnt++;
2180 port->icount.tx++;
2181 goto unlock;
2182 }
2183
2184 if (port->xmit_buf == 0)
2185 goto unlock;
2186
2187 if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2188 (port->tty->hw_stopped &&
2189 (port->type != PORT_16550A) &&
2190 (!port->board->chip_flag))) {
2191 port->IER &= ~UART_IER_THRI;
2192 outb(port->IER, port->ioaddr + UART_IER);
2193 goto unlock;
2194 }
2195
2196 cnt = port->xmit_cnt;
2197 count = port->xmit_fifo_size;
2198 do {
2199 outb(port->xmit_buf[port->xmit_tail++],
2200 port->ioaddr + UART_TX);
2201 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2202 if (--port->xmit_cnt <= 0)
2203 break;
2204 } while (--count > 0);
2205 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2206
2207 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2208 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2209 port->icount.tx += (cnt - port->xmit_cnt);
2210
2211 if (port->xmit_cnt < WAKEUP_CHARS)
2212 tty_wakeup(port->tty);
2213
2214 if (port->xmit_cnt <= 0) {
2215 port->IER &= ~UART_IER_THRI;
2216 outb(port->IER, port->ioaddr + UART_IER);
2217 }
2218 unlock:
2219 spin_unlock_irqrestore(&port->slock, flags);
2220 }
2221
2222 /*
2223 * This is the serial driver's generic interrupt routine
2224 */
2225 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2226 {
2227 int status, iir, i;
2228 struct mxser_board *brd = NULL;
2229 struct mxser_port *port;
2230 int max, irqbits, bits, msr;
2231 int pass_counter = 0;
2232 unsigned int int_cnt;
2233 int handled = IRQ_NONE;
2234
2235 for (i = 0; i < MXSER_BOARDS; i++)
2236 if (dev_id == &mxser_boards[i]) {
2237 brd = dev_id;
2238 break;
2239 }
2240
2241 if (i == MXSER_BOARDS)
2242 goto irq_stop;
2243 if (brd == NULL)
2244 goto irq_stop;
2245 max = brd->info->nports;
2246 while (1) {
2247 irqbits = inb(brd->vector) & brd->vector_mask;
2248 if (irqbits == brd->vector_mask)
2249 break;
2250
2251 handled = IRQ_HANDLED;
2252 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2253 if (irqbits == brd->vector_mask)
2254 break;
2255 if (bits & irqbits)
2256 continue;
2257 port = &brd->ports[i];
2258
2259 int_cnt = 0;
2260 do {
2261 iir = inb(port->ioaddr + UART_IIR);
2262 if (iir & UART_IIR_NO_INT)
2263 break;
2264 iir &= MOXA_MUST_IIR_MASK;
2265 if (!port->tty) {
2266 status = inb(port->ioaddr + UART_LSR);
2267 outb(0x27, port->ioaddr + UART_FCR);
2268 inb(port->ioaddr + UART_MSR);
2269 break;
2270 }
2271
2272 status = inb(port->ioaddr + UART_LSR);
2273
2274 if (status & UART_LSR_PE)
2275 port->err_shadow |= NPPI_NOTIFY_PARITY;
2276 if (status & UART_LSR_FE)
2277 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2278 if (status & UART_LSR_OE)
2279 port->err_shadow |=
2280 NPPI_NOTIFY_HW_OVERRUN;
2281 if (status & UART_LSR_BI)
2282 port->err_shadow |= NPPI_NOTIFY_BREAK;
2283
2284 if (port->board->chip_flag) {
2285 if (iir == MOXA_MUST_IIR_GDA ||
2286 iir == MOXA_MUST_IIR_RDA ||
2287 iir == MOXA_MUST_IIR_RTO ||
2288 iir == MOXA_MUST_IIR_LSR)
2289 mxser_receive_chars(port,
2290 &status);
2291
2292 } else {
2293 status &= port->read_status_mask;
2294 if (status & UART_LSR_DR)
2295 mxser_receive_chars(port,
2296 &status);
2297 }
2298 msr = inb(port->ioaddr + UART_MSR);
2299 if (msr & UART_MSR_ANY_DELTA)
2300 mxser_check_modem_status(port, msr);
2301
2302 if (port->board->chip_flag) {
2303 if (iir == 0x02 && (status &
2304 UART_LSR_THRE))
2305 mxser_transmit_chars(port);
2306 } else {
2307 if (status & UART_LSR_THRE)
2308 mxser_transmit_chars(port);
2309 }
2310 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2311 }
2312 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
2313 break; /* Prevent infinite loops */
2314 }
2315
2316 irq_stop:
2317 return handled;
2318 }
2319
2320 static const struct tty_operations mxser_ops = {
2321 .open = mxser_open,
2322 .close = mxser_close,
2323 .write = mxser_write,
2324 .put_char = mxser_put_char,
2325 .flush_chars = mxser_flush_chars,
2326 .write_room = mxser_write_room,
2327 .chars_in_buffer = mxser_chars_in_buffer,
2328 .flush_buffer = mxser_flush_buffer,
2329 .ioctl = mxser_ioctl,
2330 .throttle = mxser_throttle,
2331 .unthrottle = mxser_unthrottle,
2332 .set_termios = mxser_set_termios,
2333 .stop = mxser_stop,
2334 .start = mxser_start,
2335 .hangup = mxser_hangup,
2336 .break_ctl = mxser_rs_break,
2337 .wait_until_sent = mxser_wait_until_sent,
2338 .tiocmget = mxser_tiocmget,
2339 .tiocmset = mxser_tiocmset,
2340 };
2341
2342 /*
2343 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2344 */
2345
2346 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2347 unsigned int irq)
2348 {
2349 if (irq)
2350 free_irq(brd->irq, brd);
2351 if (pdev != NULL) { /* PCI */
2352 #ifdef CONFIG_PCI
2353 pci_release_region(pdev, 2);
2354 pci_release_region(pdev, 3);
2355 pci_dev_put(pdev);
2356 #endif
2357 } else {
2358 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2359 release_region(brd->vector, 1);
2360 }
2361 }
2362
2363 static int __devinit mxser_initbrd(struct mxser_board *brd,
2364 struct pci_dev *pdev)
2365 {
2366 struct mxser_port *info;
2367 unsigned int i;
2368 int retval;
2369
2370 printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2371
2372 for (i = 0; i < brd->info->nports; i++) {
2373 info = &brd->ports[i];
2374 info->board = brd;
2375 info->stop_rx = 0;
2376 info->ldisc_stop_rx = 0;
2377
2378 /* Enhance mode enabled here */
2379 if (brd->chip_flag != MOXA_OTHER_UART)
2380 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2381
2382 info->flags = ASYNC_SHARE_IRQ;
2383 info->type = brd->uart_type;
2384
2385 process_txrx_fifo(info);
2386
2387 info->custom_divisor = info->baud_base * 16;
2388 info->close_delay = 5 * HZ / 10;
2389 info->closing_wait = 30 * HZ;
2390 info->normal_termios = mxvar_sdriver->init_termios;
2391 init_waitqueue_head(&info->open_wait);
2392 init_waitqueue_head(&info->delta_msr_wait);
2393 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2394 info->err_shadow = 0;
2395 spin_lock_init(&info->slock);
2396
2397 /* before set INT ISR, disable all int */
2398 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2399 info->ioaddr + UART_IER);
2400 }
2401
2402 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2403 brd);
2404 if (retval) {
2405 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2406 "conflict with another device.\n",
2407 brd->info->name, brd->irq);
2408 /* We hold resources, we need to release them. */
2409 mxser_release_res(brd, pdev, 0);
2410 return retval;
2411 }
2412 return 0;
2413 }
2414
2415 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2416 {
2417 int id, i, bits;
2418 unsigned short regs[16], irq;
2419 unsigned char scratch, scratch2;
2420
2421 brd->chip_flag = MOXA_OTHER_UART;
2422
2423 id = mxser_read_register(cap, regs);
2424 switch (id) {
2425 case C168_ASIC_ID:
2426 brd->info = &mxser_cards[0];
2427 break;
2428 case C104_ASIC_ID:
2429 brd->info = &mxser_cards[1];
2430 break;
2431 case CI104J_ASIC_ID:
2432 brd->info = &mxser_cards[2];
2433 break;
2434 case C102_ASIC_ID:
2435 brd->info = &mxser_cards[5];
2436 break;
2437 case CI132_ASIC_ID:
2438 brd->info = &mxser_cards[6];
2439 break;
2440 case CI134_ASIC_ID:
2441 brd->info = &mxser_cards[7];
2442 break;
2443 default:
2444 return 0;
2445 }
2446
2447 irq = 0;
2448 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2449 Flag-hack checks if configuration should be read as 2-port here. */
2450 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2451 irq = regs[9] & 0xF000;
2452 irq = irq | (irq >> 4);
2453 if (irq != (regs[9] & 0xFF00))
2454 return MXSER_ERR_IRQ_CONFLIT;
2455 } else if (brd->info->nports == 4) {
2456 irq = regs[9] & 0xF000;
2457 irq = irq | (irq >> 4);
2458 irq = irq | (irq >> 8);
2459 if (irq != regs[9])
2460 return MXSER_ERR_IRQ_CONFLIT;
2461 } else if (brd->info->nports == 8) {
2462 irq = regs[9] & 0xF000;
2463 irq = irq | (irq >> 4);
2464 irq = irq | (irq >> 8);
2465 if ((irq != regs[9]) || (irq != regs[10]))
2466 return MXSER_ERR_IRQ_CONFLIT;
2467 }
2468
2469 if (!irq)
2470 return MXSER_ERR_IRQ;
2471 brd->irq = ((int)(irq & 0xF000) >> 12);
2472 for (i = 0; i < 8; i++)
2473 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2474 if ((regs[12] & 0x80) == 0)
2475 return MXSER_ERR_VECTOR;
2476 brd->vector = (int)regs[11]; /* interrupt vector */
2477 if (id == 1)
2478 brd->vector_mask = 0x00FF;
2479 else
2480 brd->vector_mask = 0x000F;
2481 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2482 if (regs[12] & bits) {
2483 brd->ports[i].baud_base = 921600;
2484 brd->ports[i].max_baud = 921600;
2485 } else {
2486 brd->ports[i].baud_base = 115200;
2487 brd->ports[i].max_baud = 115200;
2488 }
2489 }
2490 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2491 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2492 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2493 outb(scratch2, cap + UART_LCR);
2494 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2495 scratch = inb(cap + UART_IIR);
2496
2497 if (scratch & 0xC0)
2498 brd->uart_type = PORT_16550A;
2499 else
2500 brd->uart_type = PORT_16450;
2501 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2502 "mxser(IO)"))
2503 return MXSER_ERR_IOADDR;
2504 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2505 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2506 return MXSER_ERR_VECTOR;
2507 }
2508 return brd->info->nports;
2509 }
2510
2511 static int __devinit mxser_probe(struct pci_dev *pdev,
2512 const struct pci_device_id *ent)
2513 {
2514 #ifdef CONFIG_PCI
2515 struct mxser_board *brd;
2516 unsigned int i, j;
2517 unsigned long ioaddress;
2518 int retval = -EINVAL;
2519
2520 for (i = 0; i < MXSER_BOARDS; i++)
2521 if (mxser_boards[i].info == NULL)
2522 break;
2523
2524 if (i >= MXSER_BOARDS) {
2525 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2526 "(maximum %d), board not configured\n", MXSER_BOARDS);
2527 goto err;
2528 }
2529
2530 brd = &mxser_boards[i];
2531 brd->idx = i * MXSER_PORTS_PER_BOARD;
2532 printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2533 mxser_cards[ent->driver_data].name,
2534 pdev->bus->number, PCI_SLOT(pdev->devfn));
2535
2536 retval = pci_enable_device(pdev);
2537 if (retval) {
2538 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2539 goto err;
2540 }
2541
2542 /* io address */
2543 ioaddress = pci_resource_start(pdev, 2);
2544 retval = pci_request_region(pdev, 2, "mxser(IO)");
2545 if (retval)
2546 goto err;
2547
2548 brd->info = &mxser_cards[ent->driver_data];
2549 for (i = 0; i < brd->info->nports; i++)
2550 brd->ports[i].ioaddr = ioaddress + 8 * i;
2551
2552 /* vector */
2553 ioaddress = pci_resource_start(pdev, 3);
2554 retval = pci_request_region(pdev, 3, "mxser(vector)");
2555 if (retval)
2556 goto err_relio;
2557 brd->vector = ioaddress;
2558
2559 /* irq */
2560 brd->irq = pdev->irq;
2561
2562 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2563 brd->uart_type = PORT_16550A;
2564 brd->vector_mask = 0;
2565
2566 for (i = 0; i < brd->info->nports; i++) {
2567 for (j = 0; j < UART_INFO_NUM; j++) {
2568 if (Gpci_uart_info[j].type == brd->chip_flag) {
2569 brd->ports[i].max_baud =
2570 Gpci_uart_info[j].max_baud;
2571
2572 /* exception....CP-102 */
2573 if (brd->info->flags & MXSER_HIGHBAUD)
2574 brd->ports[i].max_baud = 921600;
2575 break;
2576 }
2577 }
2578 }
2579
2580 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2581 for (i = 0; i < brd->info->nports; i++) {
2582 if (i < 4)
2583 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2584 else
2585 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2586 }
2587 outb(0, ioaddress + 4); /* default set to RS232 mode */
2588 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2589 }
2590
2591 for (i = 0; i < brd->info->nports; i++) {
2592 brd->vector_mask |= (1 << i);
2593 brd->ports[i].baud_base = 921600;
2594 }
2595
2596 /* mxser_initbrd will hook ISR. */
2597 if (mxser_initbrd(brd, pdev) < 0)
2598 goto err_relvec;
2599
2600 for (i = 0; i < brd->info->nports; i++)
2601 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2602
2603 pci_set_drvdata(pdev, brd);
2604
2605 return 0;
2606 err_relvec:
2607 pci_release_region(pdev, 3);
2608 err_relio:
2609 pci_release_region(pdev, 2);
2610 brd->info = NULL;
2611 err:
2612 return retval;
2613 #else
2614 return -ENODEV;
2615 #endif
2616 }
2617
2618 static void __devexit mxser_remove(struct pci_dev *pdev)
2619 {
2620 struct mxser_board *brd = pci_get_drvdata(pdev);
2621 unsigned int i;
2622
2623 for (i = 0; i < brd->info->nports; i++)
2624 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2625
2626 mxser_release_res(brd, pdev, 1);
2627 }
2628
2629 static struct pci_driver mxser_driver = {
2630 .name = "mxser",
2631 .id_table = mxser_pcibrds,
2632 .probe = mxser_probe,
2633 .remove = __devexit_p(mxser_remove)
2634 };
2635
2636 static int __init mxser_module_init(void)
2637 {
2638 struct mxser_board *brd;
2639 unsigned long cap;
2640 unsigned int i, m, isaloop;
2641 int retval, b;
2642
2643 pr_debug("Loading module mxser ...\n");
2644
2645 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2646 if (!mxvar_sdriver)
2647 return -ENOMEM;
2648
2649 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2650 MXSER_VERSION);
2651
2652 /* Initialize the tty_driver structure */
2653 mxvar_sdriver->owner = THIS_MODULE;
2654 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2655 mxvar_sdriver->name = "ttyMI";
2656 mxvar_sdriver->major = ttymajor;
2657 mxvar_sdriver->minor_start = 0;
2658 mxvar_sdriver->num = MXSER_PORTS + 1;
2659 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2660 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2661 mxvar_sdriver->init_termios = tty_std_termios;
2662 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2663 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2664 tty_set_operations(mxvar_sdriver, &mxser_ops);
2665
2666 retval = tty_register_driver(mxvar_sdriver);
2667 if (retval) {
2668 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2669 "tty driver !\n");
2670 goto err_put;
2671 }
2672
2673 mxvar_diagflag = 0;
2674
2675 m = 0;
2676 /* Start finding ISA boards here */
2677 for (isaloop = 0; isaloop < 2; isaloop++)
2678 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2679 if (!isaloop)
2680 cap = mxserBoardCAP[b]; /* predefined */
2681 else
2682 cap = ioaddr[b]; /* module param */
2683
2684 if (!cap)
2685 continue;
2686
2687 brd = &mxser_boards[m];
2688 retval = mxser_get_ISA_conf(cap, brd);
2689
2690 if (retval != 0)
2691 printk(KERN_INFO "Found MOXA %s board "
2692 "(CAP=0x%x)\n",
2693 brd->info->name, ioaddr[b]);
2694
2695 if (retval <= 0) {
2696 if (retval == MXSER_ERR_IRQ)
2697 printk(KERN_ERR "Invalid interrupt "
2698 "number, board not "
2699 "configured\n");
2700 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2701 printk(KERN_ERR "Invalid interrupt "
2702 "number, board not "
2703 "configured\n");
2704 else if (retval == MXSER_ERR_VECTOR)
2705 printk(KERN_ERR "Invalid interrupt "
2706 "vector, board not "
2707 "configured\n");
2708 else if (retval == MXSER_ERR_IOADDR)
2709 printk(KERN_ERR "Invalid I/O address, "
2710 "board not configured\n");
2711
2712 brd->info = NULL;
2713 continue;
2714 }
2715
2716 /* mxser_initbrd will hook ISR. */
2717 if (mxser_initbrd(brd, NULL) < 0) {
2718 brd->info = NULL;
2719 continue;
2720 }
2721
2722 brd->idx = m * MXSER_PORTS_PER_BOARD;
2723 for (i = 0; i < brd->info->nports; i++)
2724 tty_register_device(mxvar_sdriver, brd->idx + i,
2725 NULL);
2726
2727 m++;
2728 }
2729
2730 retval = pci_register_driver(&mxser_driver);
2731 if (retval) {
2732 printk(KERN_ERR "Can't register pci driver\n");
2733 if (!m) {
2734 retval = -ENODEV;
2735 goto err_unr;
2736 } /* else: we have some ISA cards under control */
2737 }
2738
2739 pr_debug("Done.\n");
2740
2741 return 0;
2742 err_unr:
2743 tty_unregister_driver(mxvar_sdriver);
2744 err_put:
2745 put_tty_driver(mxvar_sdriver);
2746 return retval;
2747 }
2748
2749 static void __exit mxser_module_exit(void)
2750 {
2751 unsigned int i, j;
2752
2753 pr_debug("Unloading module mxser ...\n");
2754
2755 pci_unregister_driver(&mxser_driver);
2756
2757 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2758 if (mxser_boards[i].info != NULL)
2759 for (j = 0; j < mxser_boards[i].info->nports; j++)
2760 tty_unregister_device(mxvar_sdriver,
2761 mxser_boards[i].idx + j);
2762 tty_unregister_driver(mxvar_sdriver);
2763 put_tty_driver(mxvar_sdriver);
2764
2765 for (i = 0; i < MXSER_BOARDS; i++)
2766 if (mxser_boards[i].info != NULL)
2767 mxser_release_res(&mxser_boards[i], NULL, 1);
2768
2769 pr_debug("Done.\n");
2770 }
2771
2772 module_init(mxser_module_init);
2773 module_exit(mxser_module_exit);
Linux 2.6 libata-dev (mirror)