projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
tty: add more tty_port fields
[deliverable/linux.git] / drivers / char / mxser.c
1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 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/errno.h>
24 #include <linux/signal.h>
25 #include <linux/sched.h>
26 #include <linux/timer.h>
27 #include <linux/interrupt.h>
28 #include <linux/tty.h>
29 #include <linux/tty_flip.h>
30 #include <linux/serial.h>
31 #include <linux/serial_reg.h>
32 #include <linux/major.h>
33 #include <linux/string.h>
34 #include <linux/fcntl.h>
35 #include <linux/ptrace.h>
36 #include <linux/gfp.h>
37 #include <linux/ioport.h>
38 #include <linux/mm.h>
39 #include <linux/delay.h>
40 #include <linux/pci.h>
41 #include <linux/bitops.h>
42
43 #include <asm/system.h>
44 #include <asm/io.h>
45 #include <asm/irq.h>
46 #include <asm/uaccess.h>
47
48 #include "mxser.h"
49
50 #define MXSER_VERSION "2.0.3" /* 1.11 */
51 #define MXSERMAJOR 174
52 #define MXSERCUMAJOR 175
53
54 #define MXSER_BOARDS 4 /* Max. boards */
55 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
56 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
57 #define MXSER_ISR_PASS_LIMIT 100
58
59 #define MXSER_ERR_IOADDR -1
60 #define MXSER_ERR_IRQ -2
61 #define MXSER_ERR_IRQ_CONFLIT -3
62 #define MXSER_ERR_VECTOR -4
63
64 /*CheckIsMoxaMust return value*/
65 #define MOXA_OTHER_UART 0x00
66 #define MOXA_MUST_MU150_HWID 0x01
67 #define MOXA_MUST_MU860_HWID 0x02
68
69 #define WAKEUP_CHARS 256
70
71 #define UART_MCR_AFE 0x20
72 #define UART_LSR_SPECIAL 0x1E
73
74 #define PCI_DEVICE_ID_CB108 0x1080
75 #define PCI_DEVICE_ID_CB114 0x1142
76 #define PCI_DEVICE_ID_CP114UL 0x1143
77 #define PCI_DEVICE_ID_CB134I 0x1341
78 #define PCI_DEVICE_ID_CP138U 0x1380
79 #define PCI_DEVICE_ID_POS104UL 0x1044
80
81
82 #define C168_ASIC_ID 1
83 #define C104_ASIC_ID 2
84 #define C102_ASIC_ID 0xB
85 #define CI132_ASIC_ID 4
86 #define CI134_ASIC_ID 3
87 #define CI104J_ASIC_ID 5
88
89 #define MXSER_HIGHBAUD 1
90 #define MXSER_HAS2 2
91
92 /* This is only for PCI */
93 static const struct {
94 int type;
95 int tx_fifo;
96 int rx_fifo;
97 int xmit_fifo_size;
98 int rx_high_water;
99 int rx_trigger;
100 int rx_low_water;
101 long max_baud;
102 } Gpci_uart_info[] = {
103 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
104 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
105 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
106 };
107 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
108
109 struct mxser_cardinfo {
110 char *name;
111 unsigned int nports;
112 unsigned int flags;
113 };
114
115 static const struct mxser_cardinfo mxser_cards[] = {
116 /* 0*/ { "C168 series", 8, },
117 { "C104 series", 4, },
118 { "CI-104J series", 4, },
119 { "C168H/PCI series", 8, },
120 { "C104H/PCI series", 4, },
121 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
122 { "CI-132 series", 4, MXSER_HAS2 },
123 { "CI-134 series", 4, },
124 { "CP-132 series", 2, },
125 { "CP-114 series", 4, },
126 /*10*/ { "CT-114 series", 4, },
127 { "CP-102 series", 2, MXSER_HIGHBAUD },
128 { "CP-104U series", 4, },
129 { "CP-168U series", 8, },
130 { "CP-132U series", 2, },
131 /*15*/ { "CP-134U series", 4, },
132 { "CP-104JU series", 4, },
133 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
134 { "CP-118U series", 8, },
135 { "CP-102UL series", 2, },
136 /*20*/ { "CP-102U series", 2, },
137 { "CP-118EL series", 8, },
138 { "CP-168EL series", 8, },
139 { "CP-104EL series", 4, },
140 { "CB-108 series", 8, },
141 /*25*/ { "CB-114 series", 4, },
142 { "CB-134I series", 4, },
143 { "CP-138U series", 8, },
144 { "POS-104UL series", 4, },
145 { "CP-114UL series", 4, }
146 };
147
148 /* driver_data correspond to the lines in the structure above
149 see also ISA probe function before you change something */
150 static struct pci_device_id mxser_pcibrds[] = {
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
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
182 /* Variables for insmod */
183
184 MODULE_AUTHOR("Casper Yang");
185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
186 module_param_array(ioaddr, int, NULL, 0);
187 module_param(ttymajor, int, 0);
188 MODULE_LICENSE("GPL");
189
190 struct mxser_log {
191 int tick;
192 unsigned long rxcnt[MXSER_PORTS];
193 unsigned long txcnt[MXSER_PORTS];
194 };
195
196
197 struct mxser_mon {
198 unsigned long rxcnt;
199 unsigned long txcnt;
200 unsigned long up_rxcnt;
201 unsigned long up_txcnt;
202 int modem_status;
203 unsigned char hold_reason;
204 };
205
206 struct mxser_mon_ext {
207 unsigned long rx_cnt[32];
208 unsigned long tx_cnt[32];
209 unsigned long up_rxcnt[32];
210 unsigned long up_txcnt[32];
211 int modem_status[32];
212
213 long baudrate[32];
214 int databits[32];
215 int stopbits[32];
216 int parity[32];
217 int flowctrl[32];
218 int fifo[32];
219 int iftype[32];
220 };
221
222 struct mxser_board;
223
224 struct mxser_port {
225 struct tty_port port;
226 struct mxser_board *board;
227
228 unsigned long ioaddr;
229 unsigned long opmode_ioaddr;
230 int max_baud;
231
232 int rx_high_water;
233 int rx_trigger; /* Rx fifo trigger level */
234 int rx_low_water;
235 int baud_base; /* max. speed */
236 int type; /* UART type */
237
238 int x_char; /* xon/xoff character */
239 int IER; /* Interrupt Enable Register */
240 int MCR; /* Modem control register */
241
242 unsigned char stop_rx;
243 unsigned char ldisc_stop_rx;
244
245 int custom_divisor;
246 unsigned char err_shadow;
247
248 struct async_icount icount; /* kernel counters for 4 input interrupts */
249 int timeout;
250
251 int read_status_mask;
252 int ignore_status_mask;
253 int xmit_fifo_size;
254 int xmit_head;
255 int xmit_tail;
256 int xmit_cnt;
257
258 struct ktermios normal_termios;
259
260 struct mxser_mon mon_data;
261
262 spinlock_t slock;
263 wait_queue_head_t delta_msr_wait;
264 };
265
266 struct mxser_board {
267 unsigned int idx;
268 int irq;
269 const struct mxser_cardinfo *info;
270 unsigned long vector;
271 unsigned long vector_mask;
272
273 int chip_flag;
274 int uart_type;
275
276 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
277 };
278
279 struct mxser_mstatus {
280 tcflag_t cflag;
281 int cts;
282 int dsr;
283 int ri;
284 int dcd;
285 };
286
287 static struct mxser_mstatus GMStatus[MXSER_PORTS];
288
289 static int mxserBoardCAP[MXSER_BOARDS] = {
290 0, 0, 0, 0
291 /* 0x180, 0x280, 0x200, 0x320 */
292 };
293
294 static struct mxser_board mxser_boards[MXSER_BOARDS];
295 static struct tty_driver *mxvar_sdriver;
296 static struct mxser_log mxvar_log;
297 static int mxvar_diagflag;
298 static unsigned char mxser_msr[MXSER_PORTS + 1];
299 static struct mxser_mon_ext mon_data_ext;
300 static int mxser_set_baud_method[MXSER_PORTS + 1];
301
302 static void mxser_enable_must_enchance_mode(unsigned long baseio)
303 {
304 u8 oldlcr;
305 u8 efr;
306
307 oldlcr = inb(baseio + UART_LCR);
308 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
309
310 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
311 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
312
313 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
314 outb(oldlcr, baseio + UART_LCR);
315 }
316
317 static void mxser_disable_must_enchance_mode(unsigned long baseio)
318 {
319 u8 oldlcr;
320 u8 efr;
321
322 oldlcr = inb(baseio + UART_LCR);
323 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
324
325 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
326 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
327
328 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
329 outb(oldlcr, baseio + UART_LCR);
330 }
331
332 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
333 {
334 u8 oldlcr;
335 u8 efr;
336
337 oldlcr = inb(baseio + UART_LCR);
338 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
339
340 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
341 efr &= ~MOXA_MUST_EFR_BANK_MASK;
342 efr |= MOXA_MUST_EFR_BANK0;
343
344 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
345 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
346 outb(oldlcr, baseio + UART_LCR);
347 }
348
349 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
350 {
351 u8 oldlcr;
352 u8 efr;
353
354 oldlcr = inb(baseio + UART_LCR);
355 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
356
357 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
358 efr &= ~MOXA_MUST_EFR_BANK_MASK;
359 efr |= MOXA_MUST_EFR_BANK0;
360
361 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
362 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
363 outb(oldlcr, baseio + UART_LCR);
364 }
365
366 static void mxser_set_must_fifo_value(struct mxser_port *info)
367 {
368 u8 oldlcr;
369 u8 efr;
370
371 oldlcr = inb(info->ioaddr + UART_LCR);
372 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
373
374 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
375 efr &= ~MOXA_MUST_EFR_BANK_MASK;
376 efr |= MOXA_MUST_EFR_BANK1;
377
378 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
379 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
380 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
381 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
382 outb(oldlcr, info->ioaddr + UART_LCR);
383 }
384
385 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
386 {
387 u8 oldlcr;
388 u8 efr;
389
390 oldlcr = inb(baseio + UART_LCR);
391 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
392
393 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
394 efr &= ~MOXA_MUST_EFR_BANK_MASK;
395 efr |= MOXA_MUST_EFR_BANK2;
396
397 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
398 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
399 outb(oldlcr, baseio + UART_LCR);
400 }
401
402 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
403 {
404 u8 oldlcr;
405 u8 efr;
406
407 oldlcr = inb(baseio + UART_LCR);
408 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
409
410 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
411 efr &= ~MOXA_MUST_EFR_BANK_MASK;
412 efr |= MOXA_MUST_EFR_BANK2;
413
414 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
415 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
416 outb(oldlcr, baseio + UART_LCR);
417 }
418
419 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
420 {
421 u8 oldlcr;
422 u8 efr;
423
424 oldlcr = inb(baseio + UART_LCR);
425 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
426
427 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
428 efr &= ~MOXA_MUST_EFR_SF_MASK;
429
430 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
431 outb(oldlcr, baseio + UART_LCR);
432 }
433
434 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
435 {
436 u8 oldlcr;
437 u8 efr;
438
439 oldlcr = inb(baseio + UART_LCR);
440 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
441
442 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
443 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
444 efr |= MOXA_MUST_EFR_SF_TX1;
445
446 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
447 outb(oldlcr, baseio + UART_LCR);
448 }
449
450 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
451 {
452 u8 oldlcr;
453 u8 efr;
454
455 oldlcr = inb(baseio + UART_LCR);
456 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
457
458 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
459 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
460
461 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
462 outb(oldlcr, baseio + UART_LCR);
463 }
464
465 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
466 {
467 u8 oldlcr;
468 u8 efr;
469
470 oldlcr = inb(baseio + UART_LCR);
471 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
472
473 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
474 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
475 efr |= MOXA_MUST_EFR_SF_RX1;
476
477 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
478 outb(oldlcr, baseio + UART_LCR);
479 }
480
481 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
482 {
483 u8 oldlcr;
484 u8 efr;
485
486 oldlcr = inb(baseio + UART_LCR);
487 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
488
489 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
490 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
491
492 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
493 outb(oldlcr, baseio + UART_LCR);
494 }
495
496 #ifdef CONFIG_PCI
497 static int __devinit CheckIsMoxaMust(unsigned long io)
498 {
499 u8 oldmcr, hwid;
500 int i;
501
502 outb(0, io + UART_LCR);
503 mxser_disable_must_enchance_mode(io);
504 oldmcr = inb(io + UART_MCR);
505 outb(0, io + UART_MCR);
506 mxser_set_must_xon1_value(io, 0x11);
507 if ((hwid = inb(io + UART_MCR)) != 0) {
508 outb(oldmcr, io + UART_MCR);
509 return MOXA_OTHER_UART;
510 }
511
512 mxser_get_must_hardware_id(io, &hwid);
513 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
514 if (hwid == Gpci_uart_info[i].type)
515 return (int)hwid;
516 }
517 return MOXA_OTHER_UART;
518 }
519 #endif
520
521 static void process_txrx_fifo(struct mxser_port *info)
522 {
523 int i;
524
525 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
526 info->rx_trigger = 1;
527 info->rx_high_water = 1;
528 info->rx_low_water = 1;
529 info->xmit_fifo_size = 1;
530 } else
531 for (i = 0; i < UART_INFO_NUM; i++)
532 if (info->board->chip_flag == Gpci_uart_info[i].type) {
533 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
534 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
535 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
536 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
537 break;
538 }
539 }
540
541 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
542 {
543 unsigned char status = 0;
544
545 status = inb(baseaddr + UART_MSR);
546
547 mxser_msr[port] &= 0x0F;
548 mxser_msr[port] |= status;
549 status = mxser_msr[port];
550 if (mode)
551 mxser_msr[port] = 0;
552
553 return status;
554 }
555
556 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
557 struct mxser_port *port)
558 {
559 DECLARE_WAITQUEUE(wait, current);
560 int retval;
561 int do_clocal = 0;
562 unsigned long flags;
563
564 /*
565 * If non-blocking mode is set, or the port is not enabled,
566 * then make the check up front and then exit.
567 */
568 if ((filp->f_flags & O_NONBLOCK) ||
569 test_bit(TTY_IO_ERROR, &tty->flags)) {
570 port->port.flags |= ASYNC_NORMAL_ACTIVE;
571 return 0;
572 }
573
574 if (tty->termios->c_cflag & CLOCAL)
575 do_clocal = 1;
576
577 /*
578 * Block waiting for the carrier detect and the line to become
579 * free (i.e., not in use by the callout). While we are in
580 * this loop, port->port.count is dropped by one, so that
581 * mxser_close() knows when to free things. We restore it upon
582 * exit, either normal or abnormal.
583 */
584 retval = 0;
585 add_wait_queue(&port->port.open_wait, &wait);
586
587 spin_lock_irqsave(&port->slock, flags);
588 if (!tty_hung_up_p(filp))
589 port->port.count--;
590 spin_unlock_irqrestore(&port->slock, flags);
591 port->port.blocked_open++;
592 while (1) {
593 spin_lock_irqsave(&port->slock, flags);
594 outb(inb(port->ioaddr + UART_MCR) |
595 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
596 spin_unlock_irqrestore(&port->slock, flags);
597 set_current_state(TASK_INTERRUPTIBLE);
598 if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
599 if (port->port.flags & ASYNC_HUP_NOTIFY)
600 retval = -EAGAIN;
601 else
602 retval = -ERESTARTSYS;
603 break;
604 }
605 if (!(port->port.flags & ASYNC_CLOSING) &&
606 (do_clocal ||
607 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
608 break;
609 if (signal_pending(current)) {
610 retval = -ERESTARTSYS;
611 break;
612 }
613 schedule();
614 }
615 set_current_state(TASK_RUNNING);
616 remove_wait_queue(&port->port.open_wait, &wait);
617 if (!tty_hung_up_p(filp))
618 port->port.count++;
619 port->port.blocked_open--;
620 if (retval)
621 return retval;
622 port->port.flags |= ASYNC_NORMAL_ACTIVE;
623 return 0;
624 }
625
626 static int mxser_set_baud(struct mxser_port *info, long newspd)
627 {
628 int quot = 0, baud;
629 unsigned char cval;
630
631 if (!info->port.tty || !info->port.tty->termios)
632 return -1;
633
634 if (!(info->ioaddr))
635 return -1;
636
637 if (newspd > info->max_baud)
638 return -1;
639
640 if (newspd == 134) {
641 quot = 2 * info->baud_base / 269;
642 tty_encode_baud_rate(info->port.tty, 134, 134);
643 } else if (newspd) {
644 quot = info->baud_base / newspd;
645 if (quot == 0)
646 quot = 1;
647 baud = info->baud_base/quot;
648 tty_encode_baud_rate(info->port.tty, baud, baud);
649 } else {
650 quot = 0;
651 }
652
653 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
654 info->timeout += HZ / 50; /* Add .02 seconds of slop */
655
656 if (quot) {
657 info->MCR |= UART_MCR_DTR;
658 outb(info->MCR, info->ioaddr + UART_MCR);
659 } else {
660 info->MCR &= ~UART_MCR_DTR;
661 outb(info->MCR, info->ioaddr + UART_MCR);
662 return 0;
663 }
664
665 cval = inb(info->ioaddr + UART_LCR);
666
667 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
668
669 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
670 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
671 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
672
673 #ifdef BOTHER
674 if (C_BAUD(info->port.tty) == BOTHER) {
675 quot = info->baud_base % newspd;
676 quot *= 8;
677 if (quot % newspd > newspd / 2) {
678 quot /= newspd;
679 quot++;
680 } else
681 quot /= newspd;
682
683 mxser_set_must_enum_value(info->ioaddr, quot);
684 } else
685 #endif
686 mxser_set_must_enum_value(info->ioaddr, 0);
687
688 return 0;
689 }
690
691 /*
692 * This routine is called to set the UART divisor registers to match
693 * the specified baud rate for a serial port.
694 */
695 static int mxser_change_speed(struct mxser_port *info,
696 struct ktermios *old_termios)
697 {
698 unsigned cflag, cval, fcr;
699 int ret = 0;
700 unsigned char status;
701
702 if (!info->port.tty || !info->port.tty->termios)
703 return ret;
704 cflag = info->port.tty->termios->c_cflag;
705 if (!(info->ioaddr))
706 return ret;
707
708 if (mxser_set_baud_method[info->port.tty->index] == 0)
709 mxser_set_baud(info, tty_get_baud_rate(info->port.tty));
710
711 /* byte size and parity */
712 switch (cflag & CSIZE) {
713 case CS5:
714 cval = 0x00;
715 break;
716 case CS6:
717 cval = 0x01;
718 break;
719 case CS7:
720 cval = 0x02;
721 break;
722 case CS8:
723 cval = 0x03;
724 break;
725 default:
726 cval = 0x00;
727 break; /* too keep GCC shut... */
728 }
729 if (cflag & CSTOPB)
730 cval |= 0x04;
731 if (cflag & PARENB)
732 cval |= UART_LCR_PARITY;
733 if (!(cflag & PARODD))
734 cval |= UART_LCR_EPAR;
735 if (cflag & CMSPAR)
736 cval |= UART_LCR_SPAR;
737
738 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
739 if (info->board->chip_flag) {
740 fcr = UART_FCR_ENABLE_FIFO;
741 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
742 mxser_set_must_fifo_value(info);
743 } else
744 fcr = 0;
745 } else {
746 fcr = UART_FCR_ENABLE_FIFO;
747 if (info->board->chip_flag) {
748 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
749 mxser_set_must_fifo_value(info);
750 } else {
751 switch (info->rx_trigger) {
752 case 1:
753 fcr |= UART_FCR_TRIGGER_1;
754 break;
755 case 4:
756 fcr |= UART_FCR_TRIGGER_4;
757 break;
758 case 8:
759 fcr |= UART_FCR_TRIGGER_8;
760 break;
761 default:
762 fcr |= UART_FCR_TRIGGER_14;
763 break;
764 }
765 }
766 }
767
768 /* CTS flow control flag and modem status interrupts */
769 info->IER &= ~UART_IER_MSI;
770 info->MCR &= ~UART_MCR_AFE;
771 if (cflag & CRTSCTS) {
772 info->port.flags |= ASYNC_CTS_FLOW;
773 info->IER |= UART_IER_MSI;
774 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
775 info->MCR |= UART_MCR_AFE;
776 } else {
777 status = inb(info->ioaddr + UART_MSR);
778 if (info->port.tty->hw_stopped) {
779 if (status & UART_MSR_CTS) {
780 info->port.tty->hw_stopped = 0;
781 if (info->type != PORT_16550A &&
782 !info->board->chip_flag) {
783 outb(info->IER & ~UART_IER_THRI,
784 info->ioaddr +
785 UART_IER);
786 info->IER |= UART_IER_THRI;
787 outb(info->IER, info->ioaddr +
788 UART_IER);
789 }
790 tty_wakeup(info->port.tty);
791 }
792 } else {
793 if (!(status & UART_MSR_CTS)) {
794 info->port.tty->hw_stopped = 1;
795 if ((info->type != PORT_16550A) &&
796 (!info->board->chip_flag)) {
797 info->IER &= ~UART_IER_THRI;
798 outb(info->IER, info->ioaddr +
799 UART_IER);
800 }
801 }
802 }
803 }
804 } else {
805 info->port.flags &= ~ASYNC_CTS_FLOW;
806 }
807 outb(info->MCR, info->ioaddr + UART_MCR);
808 if (cflag & CLOCAL) {
809 info->port.flags &= ~ASYNC_CHECK_CD;
810 } else {
811 info->port.flags |= ASYNC_CHECK_CD;
812 info->IER |= UART_IER_MSI;
813 }
814 outb(info->IER, info->ioaddr + UART_IER);
815
816 /*
817 * Set up parity check flag
818 */
819 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
820 if (I_INPCK(info->port.tty))
821 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
822 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
823 info->read_status_mask |= UART_LSR_BI;
824
825 info->ignore_status_mask = 0;
826
827 if (I_IGNBRK(info->port.tty)) {
828 info->ignore_status_mask |= UART_LSR_BI;
829 info->read_status_mask |= UART_LSR_BI;
830 /*
831 * If we're ignore parity and break indicators, ignore
832 * overruns too. (For real raw support).
833 */
834 if (I_IGNPAR(info->port.tty)) {
835 info->ignore_status_mask |=
836 UART_LSR_OE |
837 UART_LSR_PE |
838 UART_LSR_FE;
839 info->read_status_mask |=
840 UART_LSR_OE |
841 UART_LSR_PE |
842 UART_LSR_FE;
843 }
844 }
845 if (info->board->chip_flag) {
846 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));
847 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));
848 if (I_IXON(info->port.tty)) {
849 mxser_enable_must_rx_software_flow_control(
850 info->ioaddr);
851 } else {
852 mxser_disable_must_rx_software_flow_control(
853 info->ioaddr);
854 }
855 if (I_IXOFF(info->port.tty)) {
856 mxser_enable_must_tx_software_flow_control(
857 info->ioaddr);
858 } else {
859 mxser_disable_must_tx_software_flow_control(
860 info->ioaddr);
861 }
862 }
863
864
865 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
866 outb(cval, info->ioaddr + UART_LCR);
867
868 return ret;
869 }
870
871 static void mxser_check_modem_status(struct mxser_port *port, int status)
872 {
873 /* update input line counters */
874 if (status & UART_MSR_TERI)
875 port->icount.rng++;
876 if (status & UART_MSR_DDSR)
877 port->icount.dsr++;
878 if (status & UART_MSR_DDCD)
879 port->icount.dcd++;
880 if (status & UART_MSR_DCTS)
881 port->icount.cts++;
882 port->mon_data.modem_status = status;
883 wake_up_interruptible(&port->delta_msr_wait);
884
885 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
886 if (status & UART_MSR_DCD)
887 wake_up_interruptible(&port->port.open_wait);
888 }
889
890 if (port->port.flags & ASYNC_CTS_FLOW) {
891 if (port->port.tty->hw_stopped) {
892 if (status & UART_MSR_CTS) {
893 port->port.tty->hw_stopped = 0;
894
895 if ((port->type != PORT_16550A) &&
896 (!port->board->chip_flag)) {
897 outb(port->IER & ~UART_IER_THRI,
898 port->ioaddr + UART_IER);
899 port->IER |= UART_IER_THRI;
900 outb(port->IER, port->ioaddr +
901 UART_IER);
902 }
903 tty_wakeup(port->port.tty);
904 }
905 } else {
906 if (!(status & UART_MSR_CTS)) {
907 port->port.tty->hw_stopped = 1;
908 if (port->type != PORT_16550A &&
909 !port->board->chip_flag) {
910 port->IER &= ~UART_IER_THRI;
911 outb(port->IER, port->ioaddr +
912 UART_IER);
913 }
914 }
915 }
916 }
917 }
918
919 static int mxser_startup(struct mxser_port *info)
920 {
921 unsigned long page;
922 unsigned long flags;
923
924 page = __get_free_page(GFP_KERNEL);
925 if (!page)
926 return -ENOMEM;
927
928 spin_lock_irqsave(&info->slock, flags);
929
930 if (info->port.flags & ASYNC_INITIALIZED) {
931 free_page(page);
932 spin_unlock_irqrestore(&info->slock, flags);
933 return 0;
934 }
935
936 if (!info->ioaddr || !info->type) {
937 if (info->port.tty)
938 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
939 free_page(page);
940 spin_unlock_irqrestore(&info->slock, flags);
941 return 0;
942 }
943 if (info->port.xmit_buf)
944 free_page(page);
945 else
946 info->port.xmit_buf = (unsigned char *) page;
947
948 /*
949 * Clear the FIFO buffers and disable them
950 * (they will be reenabled in mxser_change_speed())
951 */
952 if (info->board->chip_flag)
953 outb((UART_FCR_CLEAR_RCVR |
954 UART_FCR_CLEAR_XMIT |
955 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
956 else
957 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
958 info->ioaddr + UART_FCR);
959
960 /*
961 * At this point there's no way the LSR could still be 0xFF;
962 * if it is, then bail out, because there's likely no UART
963 * here.
964 */
965 if (inb(info->ioaddr + UART_LSR) == 0xff) {
966 spin_unlock_irqrestore(&info->slock, flags);
967 if (capable(CAP_SYS_ADMIN)) {
968 if (info->port.tty)
969 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
970 return 0;
971 } else
972 return -ENODEV;
973 }
974
975 /*
976 * Clear the interrupt registers.
977 */
978 (void) inb(info->ioaddr + UART_LSR);
979 (void) inb(info->ioaddr + UART_RX);
980 (void) inb(info->ioaddr + UART_IIR);
981 (void) inb(info->ioaddr + UART_MSR);
982
983 /*
984 * Now, initialize the UART
985 */
986 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
987 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
988 outb(info->MCR, info->ioaddr + UART_MCR);
989
990 /*
991 * Finally, enable interrupts
992 */
993 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
994
995 if (info->board->chip_flag)
996 info->IER |= MOXA_MUST_IER_EGDAI;
997 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
998
999 /*
1000 * And clear the interrupt registers again for luck.
1001 */
1002 (void) inb(info->ioaddr + UART_LSR);
1003 (void) inb(info->ioaddr + UART_RX);
1004 (void) inb(info->ioaddr + UART_IIR);
1005 (void) inb(info->ioaddr + UART_MSR);
1006
1007 if (info->port.tty)
1008 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1009 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1010
1011 /*
1012 * and set the speed of the serial port
1013 */
1014 mxser_change_speed(info, NULL);
1015 info->port.flags |= ASYNC_INITIALIZED;
1016 spin_unlock_irqrestore(&info->slock, flags);
1017
1018 return 0;
1019 }
1020
1021 /*
1022 * This routine will shutdown a serial port; interrupts maybe disabled, and
1023 * DTR is dropped if the hangup on close termio flag is on.
1024 */
1025 static void mxser_shutdown(struct mxser_port *info)
1026 {
1027 unsigned long flags;
1028
1029 if (!(info->port.flags & ASYNC_INITIALIZED))
1030 return;
1031
1032 spin_lock_irqsave(&info->slock, flags);
1033
1034 /*
1035 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1036 * here so the queue might never be waken up
1037 */
1038 wake_up_interruptible(&info->delta_msr_wait);
1039
1040 /*
1041 * Free the IRQ, if necessary
1042 */
1043 if (info->port.xmit_buf) {
1044 free_page((unsigned long) info->port.xmit_buf);
1045 info->port.xmit_buf = NULL;
1046 }
1047
1048 info->IER = 0;
1049 outb(0x00, info->ioaddr + UART_IER);
1050
1051 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
1052 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
1053 outb(info->MCR, info->ioaddr + UART_MCR);
1054
1055 /* clear Rx/Tx FIFO's */
1056 if (info->board->chip_flag)
1057 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
1058 MOXA_MUST_FCR_GDA_MODE_ENABLE,
1059 info->ioaddr + UART_FCR);
1060 else
1061 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
1062 info->ioaddr + UART_FCR);
1063
1064 /* read data port to reset things */
1065 (void) inb(info->ioaddr + UART_RX);
1066
1067 if (info->port.tty)
1068 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1069
1070 info->port.flags &= ~ASYNC_INITIALIZED;
1071
1072 if (info->board->chip_flag)
1073 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1074
1075 spin_unlock_irqrestore(&info->slock, flags);
1076 }
1077
1078 /*
1079 * This routine is called whenever a serial port is opened. It
1080 * enables interrupts for a serial port, linking in its async structure into
1081 * the IRQ chain. It also performs the serial-specific
1082 * initialization for the tty structure.
1083 */
1084 static int mxser_open(struct tty_struct *tty, struct file *filp)
1085 {
1086 struct mxser_port *info;
1087 unsigned long flags;
1088 int retval, line;
1089
1090 line = tty->index;
1091 if (line == MXSER_PORTS)
1092 return 0;
1093 if (line < 0 || line > MXSER_PORTS)
1094 return -ENODEV;
1095 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1096 if (!info->ioaddr)
1097 return -ENODEV;
1098
1099 tty->driver_data = info;
1100 info->port.tty = tty;
1101 /*
1102 * Start up serial port
1103 */
1104 spin_lock_irqsave(&info->slock, flags);
1105 info->port.count++;
1106 spin_unlock_irqrestore(&info->slock, flags);
1107 retval = mxser_startup(info);
1108 if (retval)
1109 return retval;
1110
1111 retval = mxser_block_til_ready(tty, filp, info);
1112 if (retval)
1113 return retval;
1114
1115 /* unmark here for very high baud rate (ex. 921600 bps) used */
1116 tty->low_latency = 1;
1117 return 0;
1118 }
1119
1120 static void mxser_flush_buffer(struct tty_struct *tty)
1121 {
1122 struct mxser_port *info = tty->driver_data;
1123 char fcr;
1124 unsigned long flags;
1125
1126
1127 spin_lock_irqsave(&info->slock, flags);
1128 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1129
1130 fcr = inb(info->ioaddr + UART_FCR);
1131 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1132 info->ioaddr + UART_FCR);
1133 outb(fcr, info->ioaddr + UART_FCR);
1134
1135 spin_unlock_irqrestore(&info->slock, flags);
1136
1137 tty_wakeup(tty);
1138 }
1139
1140
1141 /*
1142 * This routine is called when the serial port gets closed. First, we
1143 * wait for the last remaining data to be sent. Then, we unlink its
1144 * async structure from the interrupt chain if necessary, and we free
1145 * that IRQ if nothing is left in the chain.
1146 */
1147 static void mxser_close(struct tty_struct *tty, struct file *filp)
1148 {
1149 struct mxser_port *info = tty->driver_data;
1150
1151 unsigned long timeout;
1152 unsigned long flags;
1153
1154 if (tty->index == MXSER_PORTS)
1155 return;
1156 if (!info)
1157 return;
1158
1159 spin_lock_irqsave(&info->slock, flags);
1160
1161 if (tty_hung_up_p(filp)) {
1162 spin_unlock_irqrestore(&info->slock, flags);
1163 return;
1164 }
1165 if ((tty->count == 1) && (info->port.count != 1)) {
1166 /*
1167 * Uh, oh. tty->count is 1, which means that the tty
1168 * structure will be freed. Info->port.count should always
1169 * be one in these conditions. If it's greater than
1170 * one, we've got real problems, since it means the
1171 * serial port won't be shutdown.
1172 */
1173 printk(KERN_ERR "mxser_close: bad serial port count; "
1174 "tty->count is 1, info->port.count is %d\n", info->port.count);
1175 info->port.count = 1;
1176 }
1177 if (--info->port.count < 0) {
1178 printk(KERN_ERR "mxser_close: bad serial port count for "
1179 "ttys%d: %d\n", tty->index, info->port.count);
1180 info->port.count = 0;
1181 }
1182 if (info->port.count) {
1183 spin_unlock_irqrestore(&info->slock, flags);
1184 return;
1185 }
1186 info->port.flags |= ASYNC_CLOSING;
1187 spin_unlock_irqrestore(&info->slock, flags);
1188 /*
1189 * Save the termios structure, since this port may have
1190 * separate termios for callout and dialin.
1191 */
1192 if (info->port.flags & ASYNC_NORMAL_ACTIVE)
1193 info->normal_termios = *tty->termios;
1194 /*
1195 * Now we wait for the transmit buffer to clear; and we notify
1196 * the line discipline to only process XON/XOFF characters.
1197 */
1198 tty->closing = 1;
1199 if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1200 tty_wait_until_sent(tty, info->port.closing_wait);
1201 /*
1202 * At this point we stop accepting input. To do this, we
1203 * disable the receive line status interrupts, and tell the
1204 * interrupt driver to stop checking the data ready bit in the
1205 * line status register.
1206 */
1207 info->IER &= ~UART_IER_RLSI;
1208 if (info->board->chip_flag)
1209 info->IER &= ~MOXA_MUST_RECV_ISR;
1210
1211 if (info->port.flags & ASYNC_INITIALIZED) {
1212 outb(info->IER, info->ioaddr + UART_IER);
1213 /*
1214 * Before we drop DTR, make sure the UART transmitter
1215 * has completely drained; this is especially
1216 * important if there is a transmit FIFO!
1217 */
1218 timeout = jiffies + HZ;
1219 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1220 schedule_timeout_interruptible(5);
1221 if (time_after(jiffies, timeout))
1222 break;
1223 }
1224 }
1225 mxser_shutdown(info);
1226
1227 mxser_flush_buffer(tty);
1228 tty_ldisc_flush(tty);
1229
1230 tty->closing = 0;
1231 info->port.tty = NULL;
1232 if (info->port.blocked_open) {
1233 if (info->port.close_delay)
1234 schedule_timeout_interruptible(info->port.close_delay);
1235 wake_up_interruptible(&info->port.open_wait);
1236 }
1237
1238 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1239 }
1240
1241 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1242 {
1243 int c, total = 0;
1244 struct mxser_port *info = tty->driver_data;
1245 unsigned long flags;
1246
1247 if (!info->port.xmit_buf)
1248 return 0;
1249
1250 while (1) {
1251 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1252 SERIAL_XMIT_SIZE - info->xmit_head));
1253 if (c <= 0)
1254 break;
1255
1256 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1257 spin_lock_irqsave(&info->slock, flags);
1258 info->xmit_head = (info->xmit_head + c) &
1259 (SERIAL_XMIT_SIZE - 1);
1260 info->xmit_cnt += c;
1261 spin_unlock_irqrestore(&info->slock, flags);
1262
1263 buf += c;
1264 count -= c;
1265 total += c;
1266 }
1267
1268 if (info->xmit_cnt && !tty->stopped) {
1269 if (!tty->hw_stopped ||
1270 (info->type == PORT_16550A) ||
1271 (info->board->chip_flag)) {
1272 spin_lock_irqsave(&info->slock, flags);
1273 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1274 UART_IER);
1275 info->IER |= UART_IER_THRI;
1276 outb(info->IER, info->ioaddr + UART_IER);
1277 spin_unlock_irqrestore(&info->slock, flags);
1278 }
1279 }
1280 return total;
1281 }
1282
1283 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1284 {
1285 struct mxser_port *info = tty->driver_data;
1286 unsigned long flags;
1287
1288 if (!info->port.xmit_buf)
1289 return 0;
1290
1291 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1292 return 0;
1293
1294 spin_lock_irqsave(&info->slock, flags);
1295 info->port.xmit_buf[info->xmit_head++] = ch;
1296 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1297 info->xmit_cnt++;
1298 spin_unlock_irqrestore(&info->slock, flags);
1299 if (!tty->stopped) {
1300 if (!tty->hw_stopped ||
1301 (info->type == PORT_16550A) ||
1302 info->board->chip_flag) {
1303 spin_lock_irqsave(&info->slock, flags);
1304 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1305 info->IER |= UART_IER_THRI;
1306 outb(info->IER, info->ioaddr + UART_IER);
1307 spin_unlock_irqrestore(&info->slock, flags);
1308 }
1309 }
1310 return 1;
1311 }
1312
1313
1314 static void mxser_flush_chars(struct tty_struct *tty)
1315 {
1316 struct mxser_port *info = tty->driver_data;
1317 unsigned long flags;
1318
1319 if (info->xmit_cnt <= 0 ||
1320 tty->stopped ||
1321 !info->port.xmit_buf ||
1322 (tty->hw_stopped &&
1323 (info->type != PORT_16550A) &&
1324 (!info->board->chip_flag)
1325 ))
1326 return;
1327
1328 spin_lock_irqsave(&info->slock, flags);
1329
1330 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1331 info->IER |= UART_IER_THRI;
1332 outb(info->IER, info->ioaddr + UART_IER);
1333
1334 spin_unlock_irqrestore(&info->slock, flags);
1335 }
1336
1337 static int mxser_write_room(struct tty_struct *tty)
1338 {
1339 struct mxser_port *info = tty->driver_data;
1340 int ret;
1341
1342 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1343 if (ret < 0)
1344 ret = 0;
1345 return ret;
1346 }
1347
1348 static int mxser_chars_in_buffer(struct tty_struct *tty)
1349 {
1350 struct mxser_port *info = tty->driver_data;
1351 return info->xmit_cnt;
1352 }
1353
1354 /*
1355 * ------------------------------------------------------------
1356 * friends of mxser_ioctl()
1357 * ------------------------------------------------------------
1358 */
1359 static int mxser_get_serial_info(struct mxser_port *info,
1360 struct serial_struct __user *retinfo)
1361 {
1362 struct serial_struct tmp = {
1363 .type = info->type,
1364 .line = info->port.tty->index,
1365 .port = info->ioaddr,
1366 .irq = info->board->irq,
1367 .flags = info->port.flags,
1368 .baud_base = info->baud_base,
1369 .close_delay = info->port.close_delay,
1370 .closing_wait = info->port.closing_wait,
1371 .custom_divisor = info->custom_divisor,
1372 .hub6 = 0
1373 };
1374 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1375 return -EFAULT;
1376 return 0;
1377 }
1378
1379 static int mxser_set_serial_info(struct mxser_port *info,
1380 struct serial_struct __user *new_info)
1381 {
1382 struct serial_struct new_serial;
1383 speed_t baud;
1384 unsigned long sl_flags;
1385 unsigned int flags;
1386 int retval = 0;
1387
1388 if (!new_info || !info->ioaddr)
1389 return -ENODEV;
1390 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1391 return -EFAULT;
1392
1393 if (new_serial.irq != info->board->irq ||
1394 new_serial.port != info->ioaddr)
1395 return -EINVAL;
1396
1397 flags = info->port.flags & ASYNC_SPD_MASK;
1398
1399 if (!capable(CAP_SYS_ADMIN)) {
1400 if ((new_serial.baud_base != info->baud_base) ||
1401 (new_serial.close_delay != info->port.close_delay) ||
1402 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1403 return -EPERM;
1404 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1405 (new_serial.flags & ASYNC_USR_MASK));
1406 } else {
1407 /*
1408 * OK, past this point, all the error checking has been done.
1409 * At this point, we start making changes.....
1410 */
1411 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1412 (new_serial.flags & ASYNC_FLAGS));
1413 info->port.close_delay = new_serial.close_delay * HZ / 100;
1414 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1415 info->port.tty->low_latency =
1416 (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1417 info->port.tty->low_latency = 0;
1418 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1419 (new_serial.baud_base != info->baud_base ||
1420 new_serial.custom_divisor !=
1421 info->custom_divisor)) {
1422 baud = new_serial.baud_base / new_serial.custom_divisor;
1423 tty_encode_baud_rate(info->port.tty, baud, baud);
1424 }
1425 }
1426
1427 info->type = new_serial.type;
1428
1429 process_txrx_fifo(info);
1430
1431 if (info->port.flags & ASYNC_INITIALIZED) {
1432 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1433 spin_lock_irqsave(&info->slock, sl_flags);
1434 mxser_change_speed(info, NULL);
1435 spin_unlock_irqrestore(&info->slock, sl_flags);
1436 }
1437 } else
1438 retval = mxser_startup(info);
1439
1440 return retval;
1441 }
1442
1443 /*
1444 * mxser_get_lsr_info - get line status register info
1445 *
1446 * Purpose: Let user call ioctl() to get info when the UART physically
1447 * is emptied. On bus types like RS485, the transmitter must
1448 * release the bus after transmitting. This must be done when
1449 * the transmit shift register is empty, not be done when the
1450 * transmit holding register is empty. This functionality
1451 * allows an RS485 driver to be written in user space.
1452 */
1453 static int mxser_get_lsr_info(struct mxser_port *info,
1454 unsigned int __user *value)
1455 {
1456 unsigned char status;
1457 unsigned int result;
1458 unsigned long flags;
1459
1460 spin_lock_irqsave(&info->slock, flags);
1461 status = inb(info->ioaddr + UART_LSR);
1462 spin_unlock_irqrestore(&info->slock, flags);
1463 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1464 return put_user(result, value);
1465 }
1466
1467 /*
1468 * This routine sends a break character out the serial port.
1469 */
1470 static void mxser_send_break(struct mxser_port *info, int duration)
1471 {
1472 unsigned long flags;
1473
1474 if (!info->ioaddr)
1475 return;
1476 set_current_state(TASK_INTERRUPTIBLE);
1477 spin_lock_irqsave(&info->slock, flags);
1478 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1479 info->ioaddr + UART_LCR);
1480 spin_unlock_irqrestore(&info->slock, flags);
1481 schedule_timeout(duration);
1482 spin_lock_irqsave(&info->slock, flags);
1483 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1484 info->ioaddr + UART_LCR);
1485 spin_unlock_irqrestore(&info->slock, flags);
1486 }
1487
1488 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1489 {
1490 struct mxser_port *info = tty->driver_data;
1491 unsigned char control, status;
1492 unsigned long flags;
1493
1494
1495 if (tty->index == MXSER_PORTS)
1496 return -ENOIOCTLCMD;
1497 if (test_bit(TTY_IO_ERROR, &tty->flags))
1498 return -EIO;
1499
1500 control = info->MCR;
1501
1502 spin_lock_irqsave(&info->slock, flags);
1503 status = inb(info->ioaddr + UART_MSR);
1504 if (status & UART_MSR_ANY_DELTA)
1505 mxser_check_modem_status(info, status);
1506 spin_unlock_irqrestore(&info->slock, flags);
1507 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1508 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1509 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1510 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1511 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1512 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1513 }
1514
1515 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1516 unsigned int set, unsigned int clear)
1517 {
1518 struct mxser_port *info = tty->driver_data;
1519 unsigned long flags;
1520
1521
1522 if (tty->index == MXSER_PORTS)
1523 return -ENOIOCTLCMD;
1524 if (test_bit(TTY_IO_ERROR, &tty->flags))
1525 return -EIO;
1526
1527 spin_lock_irqsave(&info->slock, flags);
1528
1529 if (set & TIOCM_RTS)
1530 info->MCR |= UART_MCR_RTS;
1531 if (set & TIOCM_DTR)
1532 info->MCR |= UART_MCR_DTR;
1533
1534 if (clear & TIOCM_RTS)
1535 info->MCR &= ~UART_MCR_RTS;
1536 if (clear & TIOCM_DTR)
1537 info->MCR &= ~UART_MCR_DTR;
1538
1539 outb(info->MCR, info->ioaddr + UART_MCR);
1540 spin_unlock_irqrestore(&info->slock, flags);
1541 return 0;
1542 }
1543
1544 static int __init mxser_program_mode(int port)
1545 {
1546 int id, i, j, n;
1547
1548 outb(0, port);
1549 outb(0, port);
1550 outb(0, port);
1551 (void)inb(port);
1552 (void)inb(port);
1553 outb(0, port);
1554 (void)inb(port);
1555
1556 id = inb(port + 1) & 0x1F;
1557 if ((id != C168_ASIC_ID) &&
1558 (id != C104_ASIC_ID) &&
1559 (id != C102_ASIC_ID) &&
1560 (id != CI132_ASIC_ID) &&
1561 (id != CI134_ASIC_ID) &&
1562 (id != CI104J_ASIC_ID))
1563 return -1;
1564 for (i = 0, j = 0; i < 4; i++) {
1565 n = inb(port + 2);
1566 if (n == 'M') {
1567 j = 1;
1568 } else if ((j == 1) && (n == 1)) {
1569 j = 2;
1570 break;
1571 } else
1572 j = 0;
1573 }
1574 if (j != 2)
1575 id = -2;
1576 return id;
1577 }
1578
1579 static void __init mxser_normal_mode(int port)
1580 {
1581 int i, n;
1582
1583 outb(0xA5, port + 1);
1584 outb(0x80, port + 3);
1585 outb(12, port + 0); /* 9600 bps */
1586 outb(0, port + 1);
1587 outb(0x03, port + 3); /* 8 data bits */
1588 outb(0x13, port + 4); /* loop back mode */
1589 for (i = 0; i < 16; i++) {
1590 n = inb(port + 5);
1591 if ((n & 0x61) == 0x60)
1592 break;
1593 if ((n & 1) == 1)
1594 (void)inb(port);
1595 }
1596 outb(0x00, port + 4);
1597 }
1598
1599 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1600 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1601 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1602 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1603 #define EN_CCMD 0x000 /* Chip's command register */
1604 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1605 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1606 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1607 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1608 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1609 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1610 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1611 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1612 static int __init mxser_read_register(int port, unsigned short *regs)
1613 {
1614 int i, k, value, id;
1615 unsigned int j;
1616
1617 id = mxser_program_mode(port);
1618 if (id < 0)
1619 return id;
1620 for (i = 0; i < 14; i++) {
1621 k = (i & 0x3F) | 0x180;
1622 for (j = 0x100; j > 0; j >>= 1) {
1623 outb(CHIP_CS, port);
1624 if (k & j) {
1625 outb(CHIP_CS | CHIP_DO, port);
1626 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1627 } else {
1628 outb(CHIP_CS, port);
1629 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1630 }
1631 }
1632 (void)inb(port);
1633 value = 0;
1634 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1635 outb(CHIP_CS, port);
1636 outb(CHIP_CS | CHIP_SK, port);
1637 if (inb(port) & CHIP_DI)
1638 value |= j;
1639 }
1640 regs[i] = value;
1641 outb(0, port);
1642 }
1643 mxser_normal_mode(port);
1644 return id;
1645 }
1646
1647 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1648 {
1649 struct mxser_port *port;
1650 int result, status;
1651 unsigned int i, j;
1652 int ret = 0;
1653
1654 switch (cmd) {
1655 case MOXA_GET_MAJOR:
1656 return put_user(ttymajor, (int __user *)argp);
1657
1658 case MOXA_CHKPORTENABLE:
1659 result = 0;
1660 lock_kernel();
1661 for (i = 0; i < MXSER_BOARDS; i++)
1662 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1663 if (mxser_boards[i].ports[j].ioaddr)
1664 result |= (1 << i);
1665 unlock_kernel();
1666 return put_user(result, (unsigned long __user *)argp);
1667 case MOXA_GETDATACOUNT:
1668 lock_kernel();
1669 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1670 ret = -EFAULT;
1671 unlock_kernel();
1672 return ret;
1673 case MOXA_GETMSTATUS:
1674 lock_kernel();
1675 for (i = 0; i < MXSER_BOARDS; i++)
1676 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1677 port = &mxser_boards[i].ports[j];
1678
1679 GMStatus[i].ri = 0;
1680 if (!port->ioaddr) {
1681 GMStatus[i].dcd = 0;
1682 GMStatus[i].dsr = 0;
1683 GMStatus[i].cts = 0;
1684 continue;
1685 }
1686
1687 if (!port->port.tty || !port->port.tty->termios)
1688 GMStatus[i].cflag =
1689 port->normal_termios.c_cflag;
1690 else
1691 GMStatus[i].cflag =
1692 port->port.tty->termios->c_cflag;
1693
1694 status = inb(port->ioaddr + UART_MSR);
1695 if (status & 0x80 /*UART_MSR_DCD */ )
1696 GMStatus[i].dcd = 1;
1697 else
1698 GMStatus[i].dcd = 0;
1699
1700 if (status & 0x20 /*UART_MSR_DSR */ )
1701 GMStatus[i].dsr = 1;
1702 else
1703 GMStatus[i].dsr = 0;
1704
1705
1706 if (status & 0x10 /*UART_MSR_CTS */ )
1707 GMStatus[i].cts = 1;
1708 else
1709 GMStatus[i].cts = 0;
1710 }
1711 unlock_kernel();
1712 if (copy_to_user(argp, GMStatus,
1713 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1714 return -EFAULT;
1715 return 0;
1716 case MOXA_ASPP_MON_EXT: {
1717 int p, shiftbit;
1718 unsigned long opmode;
1719 unsigned cflag, iflag;
1720
1721 lock_kernel();
1722 for (i = 0; i < MXSER_BOARDS; i++) {
1723 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1724 port = &mxser_boards[i].ports[j];
1725 if (!port->ioaddr)
1726 continue;
1727
1728 status = mxser_get_msr(port->ioaddr, 0, i);
1729
1730 if (status & UART_MSR_TERI)
1731 port->icount.rng++;
1732 if (status & UART_MSR_DDSR)
1733 port->icount.dsr++;
1734 if (status & UART_MSR_DDCD)
1735 port->icount.dcd++;
1736 if (status & UART_MSR_DCTS)
1737 port->icount.cts++;
1738
1739 port->mon_data.modem_status = status;
1740 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1741 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1742 mon_data_ext.up_rxcnt[i] =
1743 port->mon_data.up_rxcnt;
1744 mon_data_ext.up_txcnt[i] =
1745 port->mon_data.up_txcnt;
1746 mon_data_ext.modem_status[i] =
1747 port->mon_data.modem_status;
1748 mon_data_ext.baudrate[i] =
1749 tty_get_baud_rate(port->port.tty);
1750
1751 if (!port->port.tty || !port->port.tty->termios) {
1752 cflag = port->normal_termios.c_cflag;
1753 iflag = port->normal_termios.c_iflag;
1754 } else {
1755 cflag = port->port.tty->termios->c_cflag;
1756 iflag = port->port.tty->termios->c_iflag;
1757 }
1758
1759 mon_data_ext.databits[i] = cflag & CSIZE;
1760
1761 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1762
1763 mon_data_ext.parity[i] =
1764 cflag & (PARENB | PARODD | CMSPAR);
1765
1766 mon_data_ext.flowctrl[i] = 0x00;
1767
1768 if (cflag & CRTSCTS)
1769 mon_data_ext.flowctrl[i] |= 0x03;
1770
1771 if (iflag & (IXON | IXOFF))
1772 mon_data_ext.flowctrl[i] |= 0x0C;
1773
1774 if (port->type == PORT_16550A)
1775 mon_data_ext.fifo[i] = 1;
1776 else
1777 mon_data_ext.fifo[i] = 0;
1778
1779 p = i % 4;
1780 shiftbit = p * 2;
1781 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1782 opmode &= OP_MODE_MASK;
1783
1784 mon_data_ext.iftype[i] = opmode;
1785
1786 }
1787 }
1788 unlock_kernel();
1789 if (copy_to_user(argp, &mon_data_ext,
1790 sizeof(mon_data_ext)))
1791 return -EFAULT;
1792 return 0;
1793 }
1794 default:
1795 return -ENOIOCTLCMD;
1796 }
1797 return 0;
1798 }
1799
1800 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1801 struct async_icount *cprev)
1802 {
1803 struct async_icount cnow;
1804 unsigned long flags;
1805 int ret;
1806
1807 spin_lock_irqsave(&info->slock, flags);
1808 cnow = info->icount; /* atomic copy */
1809 spin_unlock_irqrestore(&info->slock, flags);
1810
1811 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1812 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1813 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1814 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1815
1816 *cprev = cnow;
1817
1818 return ret;
1819 }
1820
1821 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1822 unsigned int cmd, unsigned long arg)
1823 {
1824 struct mxser_port *info = tty->driver_data;
1825 struct async_icount cnow;
1826 struct serial_icounter_struct __user *p_cuser;
1827 unsigned long flags;
1828 void __user *argp = (void __user *)arg;
1829 int retval;
1830
1831 if (tty->index == MXSER_PORTS)
1832 return mxser_ioctl_special(cmd, argp);
1833
1834 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1835 int p;
1836 unsigned long opmode;
1837 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1838 int shiftbit;
1839 unsigned char val, mask;
1840
1841 p = tty->index % 4;
1842 if (cmd == MOXA_SET_OP_MODE) {
1843 if (get_user(opmode, (int __user *) argp))
1844 return -EFAULT;
1845 if (opmode != RS232_MODE &&
1846 opmode != RS485_2WIRE_MODE &&
1847 opmode != RS422_MODE &&
1848 opmode != RS485_4WIRE_MODE)
1849 return -EFAULT;
1850 lock_kernel();
1851 mask = ModeMask[p];
1852 shiftbit = p * 2;
1853 val = inb(info->opmode_ioaddr);
1854 val &= mask;
1855 val |= (opmode << shiftbit);
1856 outb(val, info->opmode_ioaddr);
1857 unlock_kernel();
1858 } else {
1859 lock_kernel();
1860 shiftbit = p * 2;
1861 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1862 opmode &= OP_MODE_MASK;
1863 unlock_kernel();
1864 if (put_user(opmode, (int __user *)argp))
1865 return -EFAULT;
1866 }
1867 return 0;
1868 }
1869
1870 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1871 test_bit(TTY_IO_ERROR, &tty->flags))
1872 return -EIO;
1873
1874 switch (cmd) {
1875 case TCSBRK: /* SVID version: non-zero arg --> no break */
1876 retval = tty_check_change(tty);
1877 if (retval)
1878 return retval;
1879 tty_wait_until_sent(tty, 0);
1880 if (!arg)
1881 mxser_send_break(info, HZ / 4); /* 1/4 second */
1882 return 0;
1883 case TCSBRKP: /* support for POSIX tcsendbreak() */
1884 retval = tty_check_change(tty);
1885 if (retval)
1886 return retval;
1887 tty_wait_until_sent(tty, 0);
1888 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1889 return 0;
1890 case TIOCGSERIAL:
1891 lock_kernel();
1892 retval = mxser_get_serial_info(info, argp);
1893 unlock_kernel();
1894 return retval;
1895 case TIOCSSERIAL:
1896 lock_kernel();
1897 retval = mxser_set_serial_info(info, argp);
1898 unlock_kernel();
1899 return retval;
1900 case TIOCSERGETLSR: /* Get line status register */
1901 return mxser_get_lsr_info(info, argp);
1902 /*
1903 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1904 * - mask passed in arg for lines of interest
1905 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1906 * Caller should use TIOCGICOUNT to see which one it was
1907 */
1908 case TIOCMIWAIT:
1909 spin_lock_irqsave(&info->slock, flags);
1910 cnow = info->icount; /* note the counters on entry */
1911 spin_unlock_irqrestore(&info->slock, flags);
1912
1913 return wait_event_interruptible(info->delta_msr_wait,
1914 mxser_cflags_changed(info, arg, &cnow));
1915 /*
1916 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1917 * Return: write counters to the user passed counter struct
1918 * NB: both 1->0 and 0->1 transitions are counted except for
1919 * RI where only 0->1 is counted.
1920 */
1921 case TIOCGICOUNT:
1922 spin_lock_irqsave(&info->slock, flags);
1923 cnow = info->icount;
1924 spin_unlock_irqrestore(&info->slock, flags);
1925 p_cuser = argp;
1926 if (put_user(cnow.frame, &p_cuser->frame))
1927 return -EFAULT;
1928 if (put_user(cnow.brk, &p_cuser->brk))
1929 return -EFAULT;
1930 if (put_user(cnow.overrun, &p_cuser->overrun))
1931 return -EFAULT;
1932 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1933 return -EFAULT;
1934 if (put_user(cnow.parity, &p_cuser->parity))
1935 return -EFAULT;
1936 if (put_user(cnow.rx, &p_cuser->rx))
1937 return -EFAULT;
1938 if (put_user(cnow.tx, &p_cuser->tx))
1939 return -EFAULT;
1940 put_user(cnow.cts, &p_cuser->cts);
1941 put_user(cnow.dsr, &p_cuser->dsr);
1942 put_user(cnow.rng, &p_cuser->rng);
1943 put_user(cnow.dcd, &p_cuser->dcd);
1944 return 0;
1945 case MOXA_HighSpeedOn:
1946 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1947 case MOXA_SDS_RSTICOUNTER:
1948 lock_kernel();
1949 info->mon_data.rxcnt = 0;
1950 info->mon_data.txcnt = 0;
1951 unlock_kernel();
1952 return 0;
1953
1954 case MOXA_ASPP_OQUEUE:{
1955 int len, lsr;
1956
1957 lock_kernel();
1958 len = mxser_chars_in_buffer(tty);
1959 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1960 len += (lsr ? 0 : 1);
1961 unlock_kernel();
1962
1963 return put_user(len, (int __user *)argp);
1964 }
1965 case MOXA_ASPP_MON: {
1966 int mcr, status;
1967
1968 lock_kernel();
1969 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1970 mxser_check_modem_status(info, status);
1971
1972 mcr = inb(info->ioaddr + UART_MCR);
1973 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1974 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1975 else
1976 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1977
1978 if (mcr & MOXA_MUST_MCR_TX_XON)
1979 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1980 else
1981 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1982
1983 if (info->port.tty->hw_stopped)
1984 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1985 else
1986 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1987 unlock_kernel();
1988 if (copy_to_user(argp, &info->mon_data,
1989 sizeof(struct mxser_mon)))
1990 return -EFAULT;
1991
1992 return 0;
1993 }
1994 case MOXA_ASPP_LSTATUS: {
1995 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1996 return -EFAULT;
1997
1998 info->err_shadow = 0;
1999 return 0;
2000 }
2001 case MOXA_SET_BAUD_METHOD: {
2002 int method;
2003
2004 if (get_user(method, (int __user *)argp))
2005 return -EFAULT;
2006 mxser_set_baud_method[tty->index] = method;
2007 return put_user(method, (int __user *)argp);
2008 }
2009 default:
2010 return -ENOIOCTLCMD;
2011 }
2012 return 0;
2013 }
2014
2015 static void mxser_stoprx(struct tty_struct *tty)
2016 {
2017 struct mxser_port *info = tty->driver_data;
2018
2019 info->ldisc_stop_rx = 1;
2020 if (I_IXOFF(tty)) {
2021 if (info->board->chip_flag) {
2022 info->IER &= ~MOXA_MUST_RECV_ISR;
2023 outb(info->IER, info->ioaddr + UART_IER);
2024 } else {
2025 info->x_char = STOP_CHAR(tty);
2026 outb(0, info->ioaddr + UART_IER);
2027 info->IER |= UART_IER_THRI;
2028 outb(info->IER, info->ioaddr + UART_IER);
2029 }
2030 }
2031
2032 if (info->port.tty->termios->c_cflag & CRTSCTS) {
2033 info->MCR &= ~UART_MCR_RTS;
2034 outb(info->MCR, info->ioaddr + UART_MCR);
2035 }
2036 }
2037
2038 /*
2039 * This routine is called by the upper-layer tty layer to signal that
2040 * incoming characters should be throttled.
2041 */
2042 static void mxser_throttle(struct tty_struct *tty)
2043 {
2044 mxser_stoprx(tty);
2045 }
2046
2047 static void mxser_unthrottle(struct tty_struct *tty)
2048 {
2049 struct mxser_port *info = tty->driver_data;
2050
2051 /* startrx */
2052 info->ldisc_stop_rx = 0;
2053 if (I_IXOFF(tty)) {
2054 if (info->x_char)
2055 info->x_char = 0;
2056 else {
2057 if (info->board->chip_flag) {
2058 info->IER |= MOXA_MUST_RECV_ISR;
2059 outb(info->IER, info->ioaddr + UART_IER);
2060 } else {
2061 info->x_char = START_CHAR(tty);
2062 outb(0, info->ioaddr + UART_IER);
2063 info->IER |= UART_IER_THRI;
2064 outb(info->IER, info->ioaddr + UART_IER);
2065 }
2066 }
2067 }
2068
2069 if (info->port.tty->termios->c_cflag & CRTSCTS) {
2070 info->MCR |= UART_MCR_RTS;
2071 outb(info->MCR, info->ioaddr + UART_MCR);
2072 }
2073 }
2074
2075 /*
2076 * mxser_stop() and mxser_start()
2077 *
2078 * This routines are called before setting or resetting tty->stopped.
2079 * They enable or disable transmitter interrupts, as necessary.
2080 */
2081 static void mxser_stop(struct tty_struct *tty)
2082 {
2083 struct mxser_port *info = tty->driver_data;
2084 unsigned long flags;
2085
2086 spin_lock_irqsave(&info->slock, flags);
2087 if (info->IER & UART_IER_THRI) {
2088 info->IER &= ~UART_IER_THRI;
2089 outb(info->IER, info->ioaddr + UART_IER);
2090 }
2091 spin_unlock_irqrestore(&info->slock, flags);
2092 }
2093
2094 static void mxser_start(struct tty_struct *tty)
2095 {
2096 struct mxser_port *info = tty->driver_data;
2097 unsigned long flags;
2098
2099 spin_lock_irqsave(&info->slock, flags);
2100 if (info->xmit_cnt && info->port.xmit_buf) {
2101 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
2102 info->IER |= UART_IER_THRI;
2103 outb(info->IER, info->ioaddr + UART_IER);
2104 }
2105 spin_unlock_irqrestore(&info->slock, flags);
2106 }
2107
2108 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2109 {
2110 struct mxser_port *info = tty->driver_data;
2111 unsigned long flags;
2112
2113 spin_lock_irqsave(&info->slock, flags);
2114 mxser_change_speed(info, old_termios);
2115 spin_unlock_irqrestore(&info->slock, flags);
2116
2117 if ((old_termios->c_cflag & CRTSCTS) &&
2118 !(tty->termios->c_cflag & CRTSCTS)) {
2119 tty->hw_stopped = 0;
2120 mxser_start(tty);
2121 }
2122
2123 /* Handle sw stopped */
2124 if ((old_termios->c_iflag & IXON) &&
2125 !(tty->termios->c_iflag & IXON)) {
2126 tty->stopped = 0;
2127
2128 if (info->board->chip_flag) {
2129 spin_lock_irqsave(&info->slock, flags);
2130 mxser_disable_must_rx_software_flow_control(
2131 info->ioaddr);
2132 spin_unlock_irqrestore(&info->slock, flags);
2133 }
2134
2135 mxser_start(tty);
2136 }
2137 }
2138
2139 /*
2140 * mxser_wait_until_sent() --- wait until the transmitter is empty
2141 */
2142 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2143 {
2144 struct mxser_port *info = tty->driver_data;
2145 unsigned long orig_jiffies, char_time;
2146 int lsr;
2147
2148 if (info->type == PORT_UNKNOWN)
2149 return;
2150
2151 if (info->xmit_fifo_size == 0)
2152 return; /* Just in case.... */
2153
2154 orig_jiffies = jiffies;
2155 /*
2156 * Set the check interval to be 1/5 of the estimated time to
2157 * send a single character, and make it at least 1. The check
2158 * interval should also be less than the timeout.
2159 *
2160 * Note: we have to use pretty tight timings here to satisfy
2161 * the NIST-PCTS.
2162 */
2163 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2164 char_time = char_time / 5;
2165 if (char_time == 0)
2166 char_time = 1;
2167 if (timeout && timeout < char_time)
2168 char_time = timeout;
2169 /*
2170 * If the transmitter hasn't cleared in twice the approximate
2171 * amount of time to send the entire FIFO, it probably won't
2172 * ever clear. This assumes the UART isn't doing flow
2173 * control, which is currently the case. Hence, if it ever
2174 * takes longer than info->timeout, this is probably due to a
2175 * UART bug of some kind. So, we clamp the timeout parameter at
2176 * 2*info->timeout.
2177 */
2178 if (!timeout || timeout > 2 * info->timeout)
2179 timeout = 2 * info->timeout;
2180 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2181 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2182 timeout, char_time);
2183 printk("jiff=%lu...", jiffies);
2184 #endif
2185 lock_kernel();
2186 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2187 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2188 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2189 #endif
2190 schedule_timeout_interruptible(char_time);
2191 if (signal_pending(current))
2192 break;
2193 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2194 break;
2195 }
2196 set_current_state(TASK_RUNNING);
2197 unlock_kernel();
2198
2199 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2200 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2201 #endif
2202 }
2203
2204 /*
2205 * This routine is called by tty_hangup() when a hangup is signaled.
2206 */
2207 static void mxser_hangup(struct tty_struct *tty)
2208 {
2209 struct mxser_port *info = tty->driver_data;
2210
2211 mxser_flush_buffer(tty);
2212 mxser_shutdown(info);
2213 info->port.count = 0;
2214 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2215 info->port.tty = NULL;
2216 wake_up_interruptible(&info->port.open_wait);
2217 }
2218
2219 /*
2220 * mxser_rs_break() --- routine which turns the break handling on or off
2221 */
2222 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2223 {
2224 struct mxser_port *info = tty->driver_data;
2225 unsigned long flags;
2226
2227 spin_lock_irqsave(&info->slock, flags);
2228 if (break_state == -1)
2229 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2230 info->ioaddr + UART_LCR);
2231 else
2232 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2233 info->ioaddr + UART_LCR);
2234 spin_unlock_irqrestore(&info->slock, flags);
2235 }
2236
2237 static void mxser_receive_chars(struct mxser_port *port, int *status)
2238 {
2239 struct tty_struct *tty = port->port.tty;
2240 unsigned char ch, gdl;
2241 int ignored = 0;
2242 int cnt = 0;
2243 int recv_room;
2244 int max = 256;
2245
2246 recv_room = tty->receive_room;
2247 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2248 mxser_stoprx(tty);
2249
2250 if (port->board->chip_flag != MOXA_OTHER_UART) {
2251
2252 if (*status & UART_LSR_SPECIAL)
2253 goto intr_old;
2254 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2255 (*status & MOXA_MUST_LSR_RERR))
2256 goto intr_old;
2257 if (*status & MOXA_MUST_LSR_RERR)
2258 goto intr_old;
2259
2260 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2261
2262 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2263 gdl &= MOXA_MUST_GDL_MASK;
2264 if (gdl >= recv_room) {
2265 if (!port->ldisc_stop_rx)
2266 mxser_stoprx(tty);
2267 }
2268 while (gdl--) {
2269 ch = inb(port->ioaddr + UART_RX);
2270 tty_insert_flip_char(tty, ch, 0);
2271 cnt++;
2272 }
2273 goto end_intr;
2274 }
2275 intr_old:
2276
2277 do {
2278 if (max-- < 0)
2279 break;
2280
2281 ch = inb(port->ioaddr + UART_RX);
2282 if (port->board->chip_flag && (*status & UART_LSR_OE))
2283 outb(0x23, port->ioaddr + UART_FCR);
2284 *status &= port->read_status_mask;
2285 if (*status & port->ignore_status_mask) {
2286 if (++ignored > 100)
2287 break;
2288 } else {
2289 char flag = 0;
2290 if (*status & UART_LSR_SPECIAL) {
2291 if (*status & UART_LSR_BI) {
2292 flag = TTY_BREAK;
2293 port->icount.brk++;
2294
2295 if (port->port.flags & ASYNC_SAK)
2296 do_SAK(tty);
2297 } else if (*status & UART_LSR_PE) {
2298 flag = TTY_PARITY;
2299 port->icount.parity++;
2300 } else if (*status & UART_LSR_FE) {
2301 flag = TTY_FRAME;
2302 port->icount.frame++;
2303 } else if (*status & UART_LSR_OE) {
2304 flag = TTY_OVERRUN;
2305 port->icount.overrun++;
2306 } else
2307 flag = TTY_BREAK;
2308 }
2309 tty_insert_flip_char(tty, ch, flag);
2310 cnt++;
2311 if (cnt >= recv_room) {
2312 if (!port->ldisc_stop_rx)
2313 mxser_stoprx(tty);
2314 break;
2315 }
2316
2317 }
2318
2319 if (port->board->chip_flag)
2320 break;
2321
2322 *status = inb(port->ioaddr + UART_LSR);
2323 } while (*status & UART_LSR_DR);
2324
2325 end_intr:
2326 mxvar_log.rxcnt[port->port.tty->index] += cnt;
2327 port->mon_data.rxcnt += cnt;
2328 port->mon_data.up_rxcnt += cnt;
2329
2330 /*
2331 * We are called from an interrupt context with &port->slock
2332 * being held. Drop it temporarily in order to prevent
2333 * recursive locking.
2334 */
2335 spin_unlock(&port->slock);
2336 tty_flip_buffer_push(tty);
2337 spin_lock(&port->slock);
2338 }
2339
2340 static void mxser_transmit_chars(struct mxser_port *port)
2341 {
2342 int count, cnt;
2343
2344 if (port->x_char) {
2345 outb(port->x_char, port->ioaddr + UART_TX);
2346 port->x_char = 0;
2347 mxvar_log.txcnt[port->port.tty->index]++;
2348 port->mon_data.txcnt++;
2349 port->mon_data.up_txcnt++;
2350 port->icount.tx++;
2351 return;
2352 }
2353
2354 if (port->port.xmit_buf == NULL)
2355 return;
2356
2357 if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||
2358 (port->port.tty->hw_stopped &&
2359 (port->type != PORT_16550A) &&
2360 (!port->board->chip_flag))) {
2361 port->IER &= ~UART_IER_THRI;
2362 outb(port->IER, port->ioaddr + UART_IER);
2363 return;
2364 }
2365
2366 cnt = port->xmit_cnt;
2367 count = port->xmit_fifo_size;
2368 do {
2369 outb(port->port.xmit_buf[port->xmit_tail++],
2370 port->ioaddr + UART_TX);
2371 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2372 if (--port->xmit_cnt <= 0)
2373 break;
2374 } while (--count > 0);
2375 mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);
2376
2377 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2378 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2379 port->icount.tx += (cnt - port->xmit_cnt);
2380
2381 if (port->xmit_cnt < WAKEUP_CHARS)
2382 tty_wakeup(port->port.tty);
2383
2384 if (port->xmit_cnt <= 0) {
2385 port->IER &= ~UART_IER_THRI;
2386 outb(port->IER, port->ioaddr + UART_IER);
2387 }
2388 }
2389
2390 /*
2391 * This is the serial driver's generic interrupt routine
2392 */
2393 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2394 {
2395 int status, iir, i;
2396 struct mxser_board *brd = NULL;
2397 struct mxser_port *port;
2398 int max, irqbits, bits, msr;
2399 unsigned int int_cnt, pass_counter = 0;
2400 int handled = IRQ_NONE;
2401
2402 for (i = 0; i < MXSER_BOARDS; i++)
2403 if (dev_id == &mxser_boards[i]) {
2404 brd = dev_id;
2405 break;
2406 }
2407
2408 if (i == MXSER_BOARDS)
2409 goto irq_stop;
2410 if (brd == NULL)
2411 goto irq_stop;
2412 max = brd->info->nports;
2413 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2414 irqbits = inb(brd->vector) & brd->vector_mask;
2415 if (irqbits == brd->vector_mask)
2416 break;
2417
2418 handled = IRQ_HANDLED;
2419 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2420 if (irqbits == brd->vector_mask)
2421 break;
2422 if (bits & irqbits)
2423 continue;
2424 port = &brd->ports[i];
2425
2426 int_cnt = 0;
2427 spin_lock(&port->slock);
2428 do {
2429 iir = inb(port->ioaddr + UART_IIR);
2430 if (iir & UART_IIR_NO_INT)
2431 break;
2432 iir &= MOXA_MUST_IIR_MASK;
2433 if (!port->port.tty ||
2434 (port->port.flags & ASYNC_CLOSING) ||
2435 !(port->port.flags &
2436 ASYNC_INITIALIZED)) {
2437 status = inb(port->ioaddr + UART_LSR);
2438 outb(0x27, port->ioaddr + UART_FCR);
2439 inb(port->ioaddr + UART_MSR);
2440 break;
2441 }
2442
2443 status = inb(port->ioaddr + UART_LSR);
2444
2445 if (status & UART_LSR_PE)
2446 port->err_shadow |= NPPI_NOTIFY_PARITY;
2447 if (status & UART_LSR_FE)
2448 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2449 if (status & UART_LSR_OE)
2450 port->err_shadow |=
2451 NPPI_NOTIFY_HW_OVERRUN;
2452 if (status & UART_LSR_BI)
2453 port->err_shadow |= NPPI_NOTIFY_BREAK;
2454
2455 if (port->board->chip_flag) {
2456 if (iir == MOXA_MUST_IIR_GDA ||
2457 iir == MOXA_MUST_IIR_RDA ||
2458 iir == MOXA_MUST_IIR_RTO ||
2459 iir == MOXA_MUST_IIR_LSR)
2460 mxser_receive_chars(port,
2461 &status);
2462
2463 } else {
2464 status &= port->read_status_mask;
2465 if (status & UART_LSR_DR)
2466 mxser_receive_chars(port,
2467 &status);
2468 }
2469 msr = inb(port->ioaddr + UART_MSR);
2470 if (msr & UART_MSR_ANY_DELTA)
2471 mxser_check_modem_status(port, msr);
2472
2473 if (port->board->chip_flag) {
2474 if (iir == 0x02 && (status &
2475 UART_LSR_THRE))
2476 mxser_transmit_chars(port);
2477 } else {
2478 if (status & UART_LSR_THRE)
2479 mxser_transmit_chars(port);
2480 }
2481 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2482 spin_unlock(&port->slock);
2483 }
2484 }
2485
2486 irq_stop:
2487 return handled;
2488 }
2489
2490 static const struct tty_operations mxser_ops = {
2491 .open = mxser_open,
2492 .close = mxser_close,
2493 .write = mxser_write,
2494 .put_char = mxser_put_char,
2495 .flush_chars = mxser_flush_chars,
2496 .write_room = mxser_write_room,
2497 .chars_in_buffer = mxser_chars_in_buffer,
2498 .flush_buffer = mxser_flush_buffer,
2499 .ioctl = mxser_ioctl,
2500 .throttle = mxser_throttle,
2501 .unthrottle = mxser_unthrottle,
2502 .set_termios = mxser_set_termios,
2503 .stop = mxser_stop,
2504 .start = mxser_start,
2505 .hangup = mxser_hangup,
2506 .break_ctl = mxser_rs_break,
2507 .wait_until_sent = mxser_wait_until_sent,
2508 .tiocmget = mxser_tiocmget,
2509 .tiocmset = mxser_tiocmset,
2510 };
2511
2512 /*
2513 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2514 */
2515
2516 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2517 unsigned int irq)
2518 {
2519 if (irq)
2520 free_irq(brd->irq, brd);
2521 if (pdev != NULL) { /* PCI */
2522 #ifdef CONFIG_PCI
2523 pci_release_region(pdev, 2);
2524 pci_release_region(pdev, 3);
2525 #endif
2526 } else {
2527 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2528 release_region(brd->vector, 1);
2529 }
2530 }
2531
2532 static int __devinit mxser_initbrd(struct mxser_board *brd,
2533 struct pci_dev *pdev)
2534 {
2535 struct mxser_port *info;
2536 unsigned int i;
2537 int retval;
2538
2539 printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2540
2541 for (i = 0; i < brd->info->nports; i++) {
2542 info = &brd->ports[i];
2543 tty_port_init(&info->port);
2544 info->board = brd;
2545 info->stop_rx = 0;
2546 info->ldisc_stop_rx = 0;
2547
2548 /* Enhance mode enabled here */
2549 if (brd->chip_flag != MOXA_OTHER_UART)
2550 mxser_enable_must_enchance_mode(info->ioaddr);
2551
2552 info->port.flags = ASYNC_SHARE_IRQ;
2553 info->type = brd->uart_type;
2554
2555 process_txrx_fifo(info);
2556
2557 info->custom_divisor = info->baud_base * 16;
2558 info->port.close_delay = 5 * HZ / 10;
2559 info->port.closing_wait = 30 * HZ;
2560 info->normal_termios = mxvar_sdriver->init_termios;
2561 init_waitqueue_head(&info->delta_msr_wait);
2562 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2563 info->err_shadow = 0;
2564 spin_lock_init(&info->slock);
2565
2566 /* before set INT ISR, disable all int */
2567 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2568 info->ioaddr + UART_IER);
2569 }
2570
2571 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2572 brd);
2573 if (retval) {
2574 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2575 "conflict with another device.\n",
2576 brd->info->name, brd->irq);
2577 /* We hold resources, we need to release them. */
2578 mxser_release_res(brd, pdev, 0);
2579 }
2580 return retval;
2581 }
2582
2583 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2584 {
2585 int id, i, bits;
2586 unsigned short regs[16], irq;
2587 unsigned char scratch, scratch2;
2588
2589 brd->chip_flag = MOXA_OTHER_UART;
2590
2591 id = mxser_read_register(cap, regs);
2592 switch (id) {
2593 case C168_ASIC_ID:
2594 brd->info = &mxser_cards[0];
2595 break;
2596 case C104_ASIC_ID:
2597 brd->info = &mxser_cards[1];
2598 break;
2599 case CI104J_ASIC_ID:
2600 brd->info = &mxser_cards[2];
2601 break;
2602 case C102_ASIC_ID:
2603 brd->info = &mxser_cards[5];
2604 break;
2605 case CI132_ASIC_ID:
2606 brd->info = &mxser_cards[6];
2607 break;
2608 case CI134_ASIC_ID:
2609 brd->info = &mxser_cards[7];
2610 break;
2611 default:
2612 return 0;
2613 }
2614
2615 irq = 0;
2616 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2617 Flag-hack checks if configuration should be read as 2-port here. */
2618 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2619 irq = regs[9] & 0xF000;
2620 irq = irq | (irq >> 4);
2621 if (irq != (regs[9] & 0xFF00))
2622 return MXSER_ERR_IRQ_CONFLIT;
2623 } else if (brd->info->nports == 4) {
2624 irq = regs[9] & 0xF000;
2625 irq = irq | (irq >> 4);
2626 irq = irq | (irq >> 8);
2627 if (irq != regs[9])
2628 return MXSER_ERR_IRQ_CONFLIT;
2629 } else if (brd->info->nports == 8) {
2630 irq = regs[9] & 0xF000;
2631 irq = irq | (irq >> 4);
2632 irq = irq | (irq >> 8);
2633 if ((irq != regs[9]) || (irq != regs[10]))
2634 return MXSER_ERR_IRQ_CONFLIT;
2635 }
2636
2637 if (!irq)
2638 return MXSER_ERR_IRQ;
2639 brd->irq = ((int)(irq & 0xF000) >> 12);
2640 for (i = 0; i < 8; i++)
2641 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2642 if ((regs[12] & 0x80) == 0)
2643 return MXSER_ERR_VECTOR;
2644 brd->vector = (int)regs[11]; /* interrupt vector */
2645 if (id == 1)
2646 brd->vector_mask = 0x00FF;
2647 else
2648 brd->vector_mask = 0x000F;
2649 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2650 if (regs[12] & bits) {
2651 brd->ports[i].baud_base = 921600;
2652 brd->ports[i].max_baud = 921600;
2653 } else {
2654 brd->ports[i].baud_base = 115200;
2655 brd->ports[i].max_baud = 115200;
2656 }
2657 }
2658 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2659 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2660 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2661 outb(scratch2, cap + UART_LCR);
2662 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2663 scratch = inb(cap + UART_IIR);
2664
2665 if (scratch & 0xC0)
2666 brd->uart_type = PORT_16550A;
2667 else
2668 brd->uart_type = PORT_16450;
2669 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2670 "mxser(IO)"))
2671 return MXSER_ERR_IOADDR;
2672 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2673 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2674 return MXSER_ERR_VECTOR;
2675 }
2676 return brd->info->nports;
2677 }
2678
2679 static int __devinit mxser_probe(struct pci_dev *pdev,
2680 const struct pci_device_id *ent)
2681 {
2682 #ifdef CONFIG_PCI
2683 struct mxser_board *brd;
2684 unsigned int i, j;
2685 unsigned long ioaddress;
2686 int retval = -EINVAL;
2687
2688 for (i = 0; i < MXSER_BOARDS; i++)
2689 if (mxser_boards[i].info == NULL)
2690 break;
2691
2692 if (i >= MXSER_BOARDS) {
2693 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2694 "(maximum %d), board not configured\n", MXSER_BOARDS);
2695 goto err;
2696 }
2697
2698 brd = &mxser_boards[i];
2699 brd->idx = i * MXSER_PORTS_PER_BOARD;
2700 printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2701 mxser_cards[ent->driver_data].name,
2702 pdev->bus->number, PCI_SLOT(pdev->devfn));
2703
2704 retval = pci_enable_device(pdev);
2705 if (retval) {
2706 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2707 goto err;
2708 }
2709
2710 /* io address */
2711 ioaddress = pci_resource_start(pdev, 2);
2712 retval = pci_request_region(pdev, 2, "mxser(IO)");
2713 if (retval)
2714 goto err;
2715
2716 brd->info = &mxser_cards[ent->driver_data];
2717 for (i = 0; i < brd->info->nports; i++)
2718 brd->ports[i].ioaddr = ioaddress + 8 * i;
2719
2720 /* vector */
2721 ioaddress = pci_resource_start(pdev, 3);
2722 retval = pci_request_region(pdev, 3, "mxser(vector)");
2723 if (retval)
2724 goto err_relio;
2725 brd->vector = ioaddress;
2726
2727 /* irq */
2728 brd->irq = pdev->irq;
2729
2730 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2731 brd->uart_type = PORT_16550A;
2732 brd->vector_mask = 0;
2733
2734 for (i = 0; i < brd->info->nports; i++) {
2735 for (j = 0; j < UART_INFO_NUM; j++) {
2736 if (Gpci_uart_info[j].type == brd->chip_flag) {
2737 brd->ports[i].max_baud =
2738 Gpci_uart_info[j].max_baud;
2739
2740 /* exception....CP-102 */
2741 if (brd->info->flags & MXSER_HIGHBAUD)
2742 brd->ports[i].max_baud = 921600;
2743 break;
2744 }
2745 }
2746 }
2747
2748 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2749 for (i = 0; i < brd->info->nports; i++) {
2750 if (i < 4)
2751 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2752 else
2753 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2754 }
2755 outb(0, ioaddress + 4); /* default set to RS232 mode */
2756 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2757 }
2758
2759 for (i = 0; i < brd->info->nports; i++) {
2760 brd->vector_mask |= (1 << i);
2761 brd->ports[i].baud_base = 921600;
2762 }
2763
2764 /* mxser_initbrd will hook ISR. */
2765 retval = mxser_initbrd(brd, pdev);
2766 if (retval)
2767 goto err_null;
2768
2769 for (i = 0; i < brd->info->nports; i++)
2770 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2771
2772 pci_set_drvdata(pdev, brd);
2773
2774 return 0;
2775 err_relio:
2776 pci_release_region(pdev, 2);
2777 err_null:
2778 brd->info = NULL;
2779 err:
2780 return retval;
2781 #else
2782 return -ENODEV;
2783 #endif
2784 }
2785
2786 static void __devexit mxser_remove(struct pci_dev *pdev)
2787 {
2788 struct mxser_board *brd = pci_get_drvdata(pdev);
2789 unsigned int i;
2790
2791 for (i = 0; i < brd->info->nports; i++)
2792 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2793
2794 mxser_release_res(brd, pdev, 1);
2795 brd->info = NULL;
2796 }
2797
2798 static struct pci_driver mxser_driver = {
2799 .name = "mxser",
2800 .id_table = mxser_pcibrds,
2801 .probe = mxser_probe,
2802 .remove = __devexit_p(mxser_remove)
2803 };
2804
2805 static int __init mxser_module_init(void)
2806 {
2807 struct mxser_board *brd;
2808 unsigned long cap;
2809 unsigned int i, m, isaloop;
2810 int retval, b;
2811
2812 pr_debug("Loading module mxser ...\n");
2813
2814 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2815 if (!mxvar_sdriver)
2816 return -ENOMEM;
2817
2818 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2819 MXSER_VERSION);
2820
2821 /* Initialize the tty_driver structure */
2822 mxvar_sdriver->owner = THIS_MODULE;
2823 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2824 mxvar_sdriver->name = "ttyMI";
2825 mxvar_sdriver->major = ttymajor;
2826 mxvar_sdriver->minor_start = 0;
2827 mxvar_sdriver->num = MXSER_PORTS + 1;
2828 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2829 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2830 mxvar_sdriver->init_termios = tty_std_termios;
2831 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2832 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2833 tty_set_operations(mxvar_sdriver, &mxser_ops);
2834
2835 retval = tty_register_driver(mxvar_sdriver);
2836 if (retval) {
2837 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2838 "tty driver !\n");
2839 goto err_put;
2840 }
2841
2842 mxvar_diagflag = 0;
2843
2844 m = 0;
2845 /* Start finding ISA boards here */
2846 for (isaloop = 0; isaloop < 2; isaloop++)
2847 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2848 if (!isaloop)
2849 cap = mxserBoardCAP[b]; /* predefined */
2850 else
2851 cap = ioaddr[b]; /* module param */
2852
2853 if (!cap)
2854 continue;
2855
2856 brd = &mxser_boards[m];
2857 retval = mxser_get_ISA_conf(cap, brd);
2858
2859 if (retval != 0)
2860 printk(KERN_INFO "Found MOXA %s board "
2861 "(CAP=0x%x)\n",
2862 brd->info->name, ioaddr[b]);
2863
2864 if (retval <= 0) {
2865 if (retval == MXSER_ERR_IRQ)
2866 printk(KERN_ERR "Invalid interrupt "
2867 "number, board not "
2868 "configured\n");
2869 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2870 printk(KERN_ERR "Invalid interrupt "
2871 "number, board not "
2872 "configured\n");
2873 else if (retval == MXSER_ERR_VECTOR)
2874 printk(KERN_ERR "Invalid interrupt "
2875 "vector, board not "
2876 "configured\n");
2877 else if (retval == MXSER_ERR_IOADDR)
2878 printk(KERN_ERR "Invalid I/O address, "
2879 "board not configured\n");
2880
2881 brd->info = NULL;
2882 continue;
2883 }
2884
2885 /* mxser_initbrd will hook ISR. */
2886 if (mxser_initbrd(brd, NULL) < 0) {
2887 brd->info = NULL;
2888 continue;
2889 }
2890
2891 brd->idx = m * MXSER_PORTS_PER_BOARD;
2892 for (i = 0; i < brd->info->nports; i++)
2893 tty_register_device(mxvar_sdriver, brd->idx + i,
2894 NULL);
2895
2896 m++;
2897 }
2898
2899 retval = pci_register_driver(&mxser_driver);
2900 if (retval) {
2901 printk(KERN_ERR "Can't register pci driver\n");
2902 if (!m) {
2903 retval = -ENODEV;
2904 goto err_unr;
2905 } /* else: we have some ISA cards under control */
2906 }
2907
2908 pr_debug("Done.\n");
2909
2910 return 0;
2911 err_unr:
2912 tty_unregister_driver(mxvar_sdriver);
2913 err_put:
2914 put_tty_driver(mxvar_sdriver);
2915 return retval;
2916 }
2917
2918 static void __exit mxser_module_exit(void)
2919 {
2920 unsigned int i, j;
2921
2922 pr_debug("Unloading module mxser ...\n");
2923
2924 pci_unregister_driver(&mxser_driver);
2925
2926 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2927 if (mxser_boards[i].info != NULL)
2928 for (j = 0; j < mxser_boards[i].info->nports; j++)
2929 tty_unregister_device(mxvar_sdriver,
2930 mxser_boards[i].idx + j);
2931 tty_unregister_driver(mxvar_sdriver);
2932 put_tty_driver(mxvar_sdriver);
2933
2934 for (i = 0; i < MXSER_BOARDS; i++)
2935 if (mxser_boards[i].info != NULL)
2936 mxser_release_res(&mxser_boards[i], NULL, 1);
2937
2938 pr_debug("Done.\n");
2939 }
2940
2941 module_init(mxser_module_init);
2942 module_exit(mxser_module_exit);
Linux kernel - Deliverables
This page took 0.125718 seconds and 5 git commands to generate.