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net: Fix recursive descent in __scm_destroy().
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / mxser.c
blobb638403e8e9c870af1d37cec1a44d5ffd54ae14f
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 */
20
21 #include <linux/module.h>
22 #include <linux/errno.h>
23 #include <linux/signal.h>
24 #include <linux/sched.h>
25 #include <linux/timer.h>
26 #include <linux/interrupt.h>
27 #include <linux/tty.h>
28 #include <linux/tty_flip.h>
29 #include <linux/serial.h>
30 #include <linux/serial_reg.h>
31 #include <linux/major.h>
32 #include <linux/string.h>
33 #include <linux/fcntl.h>
34 #include <linux/ptrace.h>
35 #include <linux/gfp.h>
36 #include <linux/ioport.h>
37 #include <linux/mm.h>
38 #include <linux/delay.h>
39 #include <linux/pci.h>
40 #include <linux/bitops.h>
41
42 #include <asm/system.h>
43 #include <asm/io.h>
44 #include <asm/irq.h>
45 #include <asm/uaccess.h>
46
47 #include "mxser.h"
48
49 #define MXSER_VERSION "2.0.4" /* 1.12 */
50 #define MXSERMAJOR 174
51
52 #define MXSER_BOARDS 4 /* Max. boards */
53 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
54 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
55 #define MXSER_ISR_PASS_LIMIT 100
56
57 /*CheckIsMoxaMust return value*/
58 #define MOXA_OTHER_UART 0x00
59 #define MOXA_MUST_MU150_HWID 0x01
60 #define MOXA_MUST_MU860_HWID 0x02
61
62 #define WAKEUP_CHARS 256
63
64 #define UART_MCR_AFE 0x20
65 #define UART_LSR_SPECIAL 0x1E
66
67 #define PCI_DEVICE_ID_POS104UL 0x1044
68 #define PCI_DEVICE_ID_CB108 0x1080
69 #define PCI_DEVICE_ID_CP102UF 0x1023
70 #define PCI_DEVICE_ID_CB114 0x1142
71 #define PCI_DEVICE_ID_CP114UL 0x1143
72 #define PCI_DEVICE_ID_CB134I 0x1341
73 #define PCI_DEVICE_ID_CP138U 0x1380
74
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 char *name;
105 unsigned int nports;
106 unsigned int flags;
107 };
108
109 static const struct mxser_cardinfo mxser_cards[] = {
110 /* 0*/ { "C168 series", 8, },
111 { "C104 series", 4, },
112 { "CI-104J series", 4, },
113 { "C168H/PCI series", 8, },
114 { "C104H/PCI series", 4, },
115 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
116 { "CI-132 series", 4, MXSER_HAS2 },
117 { "CI-134 series", 4, },
118 { "CP-132 series", 2, },
119 { "CP-114 series", 4, },
120 /*10*/ { "CT-114 series", 4, },
121 { "CP-102 series", 2, MXSER_HIGHBAUD },
122 { "CP-104U series", 4, },
123 { "CP-168U series", 8, },
124 { "CP-132U series", 2, },
125 /*15*/ { "CP-134U series", 4, },
126 { "CP-104JU series", 4, },
127 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
128 { "CP-118U series", 8, },
129 { "CP-102UL series", 2, },
130 /*20*/ { "CP-102U series", 2, },
131 { "CP-118EL series", 8, },
132 { "CP-168EL series", 8, },
133 { "CP-104EL series", 4, },
134 { "CB-108 series", 8, },
135 /*25*/ { "CB-114 series", 4, },
136 { "CB-134I series", 4, },
137 { "CP-138U series", 8, },
138 { "POS-104UL series", 4, },
139 { "CP-114UL series", 4, },
140 /*30*/ { "CP-102UF series", 2, }
141 };
142
143 /* driver_data correspond to the lines in the structure above
144 see also ISA probe function before you change something */
145 static struct pci_device_id mxser_pcibrds[] = {
146 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
147 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
148 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
171 { }
172 };
173 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
174
175 static unsigned long ioaddr[MXSER_BOARDS];
176 static int ttymajor = MXSERMAJOR;
177
178 /* Variables for insmod */
179
180 MODULE_AUTHOR("Casper Yang");
181 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
182 module_param_array(ioaddr, ulong, NULL, 0);
183 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
184 module_param(ttymajor, int, 0);
185 MODULE_LICENSE("GPL");
186
187 struct mxser_log {
188 int tick;
189 unsigned long rxcnt[MXSER_PORTS];
190 unsigned long txcnt[MXSER_PORTS];
191 };
192
193 struct mxser_mon {
194 unsigned long rxcnt;
195 unsigned long txcnt;
196 unsigned long up_rxcnt;
197 unsigned long up_txcnt;
198 int modem_status;
199 unsigned char hold_reason;
200 };
201
202 struct mxser_mon_ext {
203 unsigned long rx_cnt[32];
204 unsigned long tx_cnt[32];
205 unsigned long up_rxcnt[32];
206 unsigned long up_txcnt[32];
207 int modem_status[32];
208
209 long baudrate[32];
210 int databits[32];
211 int stopbits[32];
212 int parity[32];
213 int flowctrl[32];
214 int fifo[32];
215 int iftype[32];
216 };
217
218 struct mxser_board;
219
220 struct mxser_port {
221 struct tty_port port;
222 struct mxser_board *board;
223
224 unsigned long ioaddr;
225 unsigned long opmode_ioaddr;
226 int max_baud;
227
228 int rx_high_water;
229 int rx_trigger; /* Rx fifo trigger level */
230 int rx_low_water;
231 int baud_base; /* max. speed */
232 int type; /* UART type */
233
234 int x_char; /* xon/xoff character */
235 int IER; /* Interrupt Enable Register */
236 int MCR; /* Modem control register */
237
238 unsigned char stop_rx;
239 unsigned char ldisc_stop_rx;
240
241 int custom_divisor;
242 unsigned char err_shadow;
243
244 struct async_icount icount; /* kernel counters for 4 input interrupts */
245 int timeout;
246
247 int read_status_mask;
248 int ignore_status_mask;
249 int xmit_fifo_size;
250 int xmit_head;
251 int xmit_tail;
252 int xmit_cnt;
253
254 struct ktermios normal_termios;
255
256 struct mxser_mon mon_data;
257
258 spinlock_t slock;
259 wait_queue_head_t delta_msr_wait;
260 };
261
262 struct mxser_board {
263 unsigned int idx;
264 int irq;
265 const struct mxser_cardinfo *info;
266 unsigned long vector;
267 unsigned long vector_mask;
268
269 int chip_flag;
270 int uart_type;
271
272 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
273 };
274
275 struct mxser_mstatus {
276 tcflag_t cflag;
277 int cts;
278 int dsr;
279 int ri;
280 int dcd;
281 };
282
283 static struct mxser_board mxser_boards[MXSER_BOARDS];
284 static struct tty_driver *mxvar_sdriver;
285 static struct mxser_log mxvar_log;
286 static int mxser_set_baud_method[MXSER_PORTS + 1];
287
288 static void mxser_enable_must_enchance_mode(unsigned long baseio)
289 {
290 u8 oldlcr;
291 u8 efr;
292
293 oldlcr = inb(baseio + UART_LCR);
294 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
295
296 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
297 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
298
299 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
300 outb(oldlcr, baseio + UART_LCR);
301 }
302
303 static void mxser_disable_must_enchance_mode(unsigned long baseio)
304 {
305 u8 oldlcr;
306 u8 efr;
307
308 oldlcr = inb(baseio + UART_LCR);
309 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
310
311 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
312 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
313
314 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
315 outb(oldlcr, baseio + UART_LCR);
316 }
317
318 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
319 {
320 u8 oldlcr;
321 u8 efr;
322
323 oldlcr = inb(baseio + UART_LCR);
324 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
325
326 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
327 efr &= ~MOXA_MUST_EFR_BANK_MASK;
328 efr |= MOXA_MUST_EFR_BANK0;
329
330 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
331 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
332 outb(oldlcr, baseio + UART_LCR);
333 }
334
335 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
336 {
337 u8 oldlcr;
338 u8 efr;
339
340 oldlcr = inb(baseio + UART_LCR);
341 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
342
343 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
344 efr &= ~MOXA_MUST_EFR_BANK_MASK;
345 efr |= MOXA_MUST_EFR_BANK0;
346
347 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
348 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
349 outb(oldlcr, baseio + UART_LCR);
350 }
351
352 static void mxser_set_must_fifo_value(struct mxser_port *info)
353 {
354 u8 oldlcr;
355 u8 efr;
356
357 oldlcr = inb(info->ioaddr + UART_LCR);
358 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
359
360 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
361 efr &= ~MOXA_MUST_EFR_BANK_MASK;
362 efr |= MOXA_MUST_EFR_BANK1;
363
364 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
365 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
366 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
367 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
368 outb(oldlcr, info->ioaddr + UART_LCR);
369 }
370
371 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
372 {
373 u8 oldlcr;
374 u8 efr;
375
376 oldlcr = inb(baseio + UART_LCR);
377 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
378
379 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
380 efr &= ~MOXA_MUST_EFR_BANK_MASK;
381 efr |= MOXA_MUST_EFR_BANK2;
382
383 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
384 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
385 outb(oldlcr, baseio + UART_LCR);
386 }
387
388 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
389 {
390 u8 oldlcr;
391 u8 efr;
392
393 oldlcr = inb(baseio + UART_LCR);
394 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
395
396 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
397 efr &= ~MOXA_MUST_EFR_BANK_MASK;
398 efr |= MOXA_MUST_EFR_BANK2;
399
400 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
401 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
402 outb(oldlcr, baseio + UART_LCR);
403 }
404
405 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
406 {
407 u8 oldlcr;
408 u8 efr;
409
410 oldlcr = inb(baseio + UART_LCR);
411 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
412
413 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
414 efr &= ~MOXA_MUST_EFR_SF_MASK;
415
416 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
417 outb(oldlcr, baseio + UART_LCR);
418 }
419
420 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
421 {
422 u8 oldlcr;
423 u8 efr;
424
425 oldlcr = inb(baseio + UART_LCR);
426 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
427
428 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
429 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
430 efr |= MOXA_MUST_EFR_SF_TX1;
431
432 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
433 outb(oldlcr, baseio + UART_LCR);
434 }
435
436 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
437 {
438 u8 oldlcr;
439 u8 efr;
440
441 oldlcr = inb(baseio + UART_LCR);
442 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
443
444 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
445 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
446
447 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
448 outb(oldlcr, baseio + UART_LCR);
449 }
450
451 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
452 {
453 u8 oldlcr;
454 u8 efr;
455
456 oldlcr = inb(baseio + UART_LCR);
457 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
458
459 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
460 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
461 efr |= MOXA_MUST_EFR_SF_RX1;
462
463 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
464 outb(oldlcr, baseio + UART_LCR);
465 }
466
467 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
468 {
469 u8 oldlcr;
470 u8 efr;
471
472 oldlcr = inb(baseio + UART_LCR);
473 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
474
475 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
476 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
477
478 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
479 outb(oldlcr, baseio + UART_LCR);
480 }
481
482 #ifdef CONFIG_PCI
483 static int __devinit CheckIsMoxaMust(unsigned long io)
484 {
485 u8 oldmcr, hwid;
486 int i;
487
488 outb(0, io + UART_LCR);
489 mxser_disable_must_enchance_mode(io);
490 oldmcr = inb(io + UART_MCR);
491 outb(0, io + UART_MCR);
492 mxser_set_must_xon1_value(io, 0x11);
493 if ((hwid = inb(io + UART_MCR)) != 0) {
494 outb(oldmcr, io + UART_MCR);
495 return MOXA_OTHER_UART;
496 }
497
498 mxser_get_must_hardware_id(io, &hwid);
499 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
500 if (hwid == Gpci_uart_info[i].type)
501 return (int)hwid;
502 }
503 return MOXA_OTHER_UART;
504 }
505 #endif
506
507 static void process_txrx_fifo(struct mxser_port *info)
508 {
509 int i;
510
511 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
512 info->rx_trigger = 1;
513 info->rx_high_water = 1;
514 info->rx_low_water = 1;
515 info->xmit_fifo_size = 1;
516 } else
517 for (i = 0; i < UART_INFO_NUM; i++)
518 if (info->board->chip_flag == Gpci_uart_info[i].type) {
519 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
520 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
521 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
522 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
523 break;
524 }
525 }
526
527 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
528 {
529 static unsigned char mxser_msr[MXSER_PORTS + 1];
530 unsigned char status = 0;
531
532 status = inb(baseaddr + UART_MSR);
533
534 mxser_msr[port] &= 0x0F;
535 mxser_msr[port] |= status;
536 status = mxser_msr[port];
537 if (mode)
538 mxser_msr[port] = 0;
539
540 return status;
541 }
542
543 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
544 struct mxser_port *port)
545 {
546 DECLARE_WAITQUEUE(wait, current);
547 int retval;
548 int do_clocal = 0;
549 unsigned long flags;
550
551 /*
552 * If non-blocking mode is set, or the port is not enabled,
553 * then make the check up front and then exit.
554 */
555 if ((filp->f_flags & O_NONBLOCK) ||
556 test_bit(TTY_IO_ERROR, &tty->flags)) {
557 port->port.flags |= ASYNC_NORMAL_ACTIVE;
558 return 0;
559 }
560
561 if (tty->termios->c_cflag & CLOCAL)
562 do_clocal = 1;
563
564 /*
565 * Block waiting for the carrier detect and the line to become
566 * free (i.e., not in use by the callout). While we are in
567 * this loop, port->port.count is dropped by one, so that
568 * mxser_close() knows when to free things. We restore it upon
569 * exit, either normal or abnormal.
570 */
571 retval = 0;
572 add_wait_queue(&port->port.open_wait, &wait);
573
574 spin_lock_irqsave(&port->slock, flags);
575 if (!tty_hung_up_p(filp))
576 port->port.count--;
577 spin_unlock_irqrestore(&port->slock, flags);
578 port->port.blocked_open++;
579 while (1) {
580 spin_lock_irqsave(&port->slock, flags);
581 outb(inb(port->ioaddr + UART_MCR) |
582 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
583 spin_unlock_irqrestore(&port->slock, flags);
584 set_current_state(TASK_INTERRUPTIBLE);
585 if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
586 if (port->port.flags & ASYNC_HUP_NOTIFY)
587 retval = -EAGAIN;
588 else
589 retval = -ERESTARTSYS;
590 break;
591 }
592 if (!(port->port.flags & ASYNC_CLOSING) &&
593 (do_clocal ||
594 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
595 break;
596 if (signal_pending(current)) {
597 retval = -ERESTARTSYS;
598 break;
599 }
600 schedule();
601 }
602 set_current_state(TASK_RUNNING);
603 remove_wait_queue(&port->port.open_wait, &wait);
604 if (!tty_hung_up_p(filp))
605 port->port.count++;
606 port->port.blocked_open--;
607 if (retval)
608 return retval;
609 port->port.flags |= ASYNC_NORMAL_ACTIVE;
610 return 0;
611 }
612
613 static int mxser_set_baud(struct mxser_port *info, long newspd)
614 {
615 int quot = 0, baud;
616 unsigned char cval;
617
618 if (!info->port.tty || !info->port.tty->termios)
619 return -1;
620
621 if (!(info->ioaddr))
622 return -1;
623
624 if (newspd > info->max_baud)
625 return -1;
626
627 if (newspd == 134) {
628 quot = 2 * info->baud_base / 269;
629 tty_encode_baud_rate(info->port.tty, 134, 134);
630 } else if (newspd) {
631 quot = info->baud_base / newspd;
632 if (quot == 0)
633 quot = 1;
634 baud = info->baud_base/quot;
635 tty_encode_baud_rate(info->port.tty, baud, baud);
636 } else {
637 quot = 0;
638 }
639
640 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
641 info->timeout += HZ / 50; /* Add .02 seconds of slop */
642
643 if (quot) {
644 info->MCR |= UART_MCR_DTR;
645 outb(info->MCR, info->ioaddr + UART_MCR);
646 } else {
647 info->MCR &= ~UART_MCR_DTR;
648 outb(info->MCR, info->ioaddr + UART_MCR);
649 return 0;
650 }
651
652 cval = inb(info->ioaddr + UART_LCR);
653
654 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
655
656 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
657 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
658 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
659
660 #ifdef BOTHER
661 if (C_BAUD(info->port.tty) == BOTHER) {
662 quot = info->baud_base % newspd;
663 quot *= 8;
664 if (quot % newspd > newspd / 2) {
665 quot /= newspd;
666 quot++;
667 } else
668 quot /= newspd;
669
670 mxser_set_must_enum_value(info->ioaddr, quot);
671 } else
672 #endif
673 mxser_set_must_enum_value(info->ioaddr, 0);
674
675 return 0;
676 }
677
678 /*
679 * This routine is called to set the UART divisor registers to match
680 * the specified baud rate for a serial port.
681 */
682 static int mxser_change_speed(struct mxser_port *info,
683 struct ktermios *old_termios)
684 {
685 unsigned cflag, cval, fcr;
686 int ret = 0;
687 unsigned char status;
688
689 if (!info->port.tty || !info->port.tty->termios)
690 return ret;
691 cflag = info->port.tty->termios->c_cflag;
692 if (!(info->ioaddr))
693 return ret;
694
695 if (mxser_set_baud_method[info->port.tty->index] == 0)
696 mxser_set_baud(info, tty_get_baud_rate(info->port.tty));
697
698 /* byte size and parity */
699 switch (cflag & CSIZE) {
700 case CS5:
701 cval = 0x00;
702 break;
703 case CS6:
704 cval = 0x01;
705 break;
706 case CS7:
707 cval = 0x02;
708 break;
709 case CS8:
710 cval = 0x03;
711 break;
712 default:
713 cval = 0x00;
714 break; /* too keep GCC shut... */
715 }
716 if (cflag & CSTOPB)
717 cval |= 0x04;
718 if (cflag & PARENB)
719 cval |= UART_LCR_PARITY;
720 if (!(cflag & PARODD))
721 cval |= UART_LCR_EPAR;
722 if (cflag & CMSPAR)
723 cval |= UART_LCR_SPAR;
724
725 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
726 if (info->board->chip_flag) {
727 fcr = UART_FCR_ENABLE_FIFO;
728 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
729 mxser_set_must_fifo_value(info);
730 } else
731 fcr = 0;
732 } else {
733 fcr = UART_FCR_ENABLE_FIFO;
734 if (info->board->chip_flag) {
735 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
736 mxser_set_must_fifo_value(info);
737 } else {
738 switch (info->rx_trigger) {
739 case 1:
740 fcr |= UART_FCR_TRIGGER_1;
741 break;
742 case 4:
743 fcr |= UART_FCR_TRIGGER_4;
744 break;
745 case 8:
746 fcr |= UART_FCR_TRIGGER_8;
747 break;
748 default:
749 fcr |= UART_FCR_TRIGGER_14;
750 break;
751 }
752 }
753 }
754
755 /* CTS flow control flag and modem status interrupts */
756 info->IER &= ~UART_IER_MSI;
757 info->MCR &= ~UART_MCR_AFE;
758 if (cflag & CRTSCTS) {
759 info->port.flags |= ASYNC_CTS_FLOW;
760 info->IER |= UART_IER_MSI;
761 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
762 info->MCR |= UART_MCR_AFE;
763 } else {
764 status = inb(info->ioaddr + UART_MSR);
765 if (info->port.tty->hw_stopped) {
766 if (status & UART_MSR_CTS) {
767 info->port.tty->hw_stopped = 0;
768 if (info->type != PORT_16550A &&
769 !info->board->chip_flag) {
770 outb(info->IER & ~UART_IER_THRI,
771 info->ioaddr +
772 UART_IER);
773 info->IER |= UART_IER_THRI;
774 outb(info->IER, info->ioaddr +
775 UART_IER);
776 }
777 tty_wakeup(info->port.tty);
778 }
779 } else {
780 if (!(status & UART_MSR_CTS)) {
781 info->port.tty->hw_stopped = 1;
782 if ((info->type != PORT_16550A) &&
783 (!info->board->chip_flag)) {
784 info->IER &= ~UART_IER_THRI;
785 outb(info->IER, info->ioaddr +
786 UART_IER);
787 }
788 }
789 }
790 }
791 } else {
792 info->port.flags &= ~ASYNC_CTS_FLOW;
793 }
794 outb(info->MCR, info->ioaddr + UART_MCR);
795 if (cflag & CLOCAL) {
796 info->port.flags &= ~ASYNC_CHECK_CD;
797 } else {
798 info->port.flags |= ASYNC_CHECK_CD;
799 info->IER |= UART_IER_MSI;
800 }
801 outb(info->IER, info->ioaddr + UART_IER);
802
803 /*
804 * Set up parity check flag
805 */
806 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
807 if (I_INPCK(info->port.tty))
808 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
809 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
810 info->read_status_mask |= UART_LSR_BI;
811
812 info->ignore_status_mask = 0;
813
814 if (I_IGNBRK(info->port.tty)) {
815 info->ignore_status_mask |= UART_LSR_BI;
816 info->read_status_mask |= UART_LSR_BI;
817 /*
818 * If we're ignore parity and break indicators, ignore
819 * overruns too. (For real raw support).
820 */
821 if (I_IGNPAR(info->port.tty)) {
822 info->ignore_status_mask |=
823 UART_LSR_OE |
824 UART_LSR_PE |
825 UART_LSR_FE;
826 info->read_status_mask |=
827 UART_LSR_OE |
828 UART_LSR_PE |
829 UART_LSR_FE;
830 }
831 }
832 if (info->board->chip_flag) {
833 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));
834 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));
835 if (I_IXON(info->port.tty)) {
836 mxser_enable_must_rx_software_flow_control(
837 info->ioaddr);
838 } else {
839 mxser_disable_must_rx_software_flow_control(
840 info->ioaddr);
841 }
842 if (I_IXOFF(info->port.tty)) {
843 mxser_enable_must_tx_software_flow_control(
844 info->ioaddr);
845 } else {
846 mxser_disable_must_tx_software_flow_control(
847 info->ioaddr);
848 }
849 }
850
851
852 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
853 outb(cval, info->ioaddr + UART_LCR);
854
855 return ret;
856 }
857
858 static void mxser_check_modem_status(struct mxser_port *port, int status)
859 {
860 /* update input line counters */
861 if (status & UART_MSR_TERI)
862 port->icount.rng++;
863 if (status & UART_MSR_DDSR)
864 port->icount.dsr++;
865 if (status & UART_MSR_DDCD)
866 port->icount.dcd++;
867 if (status & UART_MSR_DCTS)
868 port->icount.cts++;
869 port->mon_data.modem_status = status;
870 wake_up_interruptible(&port->delta_msr_wait);
871
872 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
873 if (status & UART_MSR_DCD)
874 wake_up_interruptible(&port->port.open_wait);
875 }
876
877 if (port->port.flags & ASYNC_CTS_FLOW) {
878 if (port->port.tty->hw_stopped) {
879 if (status & UART_MSR_CTS) {
880 port->port.tty->hw_stopped = 0;
881
882 if ((port->type != PORT_16550A) &&
883 (!port->board->chip_flag)) {
884 outb(port->IER & ~UART_IER_THRI,
885 port->ioaddr + UART_IER);
886 port->IER |= UART_IER_THRI;
887 outb(port->IER, port->ioaddr +
888 UART_IER);
889 }
890 tty_wakeup(port->port.tty);
891 }
892 } else {
893 if (!(status & UART_MSR_CTS)) {
894 port->port.tty->hw_stopped = 1;
895 if (port->type != PORT_16550A &&
896 !port->board->chip_flag) {
897 port->IER &= ~UART_IER_THRI;
898 outb(port->IER, port->ioaddr +
899 UART_IER);
900 }
901 }
902 }
903 }
904 }
905
906 static int mxser_startup(struct mxser_port *info)
907 {
908 unsigned long page;
909 unsigned long flags;
910
911 page = __get_free_page(GFP_KERNEL);
912 if (!page)
913 return -ENOMEM;
914
915 spin_lock_irqsave(&info->slock, flags);
916
917 if (info->port.flags & ASYNC_INITIALIZED) {
918 free_page(page);
919 spin_unlock_irqrestore(&info->slock, flags);
920 return 0;
921 }
922
923 if (!info->ioaddr || !info->type) {
924 if (info->port.tty)
925 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
926 free_page(page);
927 spin_unlock_irqrestore(&info->slock, flags);
928 return 0;
929 }
930 if (info->port.xmit_buf)
931 free_page(page);
932 else
933 info->port.xmit_buf = (unsigned char *) page;
934
935 /*
936 * Clear the FIFO buffers and disable them
937 * (they will be reenabled in mxser_change_speed())
938 */
939 if (info->board->chip_flag)
940 outb((UART_FCR_CLEAR_RCVR |
941 UART_FCR_CLEAR_XMIT |
942 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
943 else
944 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
945 info->ioaddr + UART_FCR);
946
947 /*
948 * At this point there's no way the LSR could still be 0xFF;
949 * if it is, then bail out, because there's likely no UART
950 * here.
951 */
952 if (inb(info->ioaddr + UART_LSR) == 0xff) {
953 spin_unlock_irqrestore(&info->slock, flags);
954 if (capable(CAP_SYS_ADMIN)) {
955 if (info->port.tty)
956 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
957 return 0;
958 } else
959 return -ENODEV;
960 }
961
962 /*
963 * Clear the interrupt registers.
964 */
965 (void) inb(info->ioaddr + UART_LSR);
966 (void) inb(info->ioaddr + UART_RX);
967 (void) inb(info->ioaddr + UART_IIR);
968 (void) inb(info->ioaddr + UART_MSR);
969
970 /*
971 * Now, initialize the UART
972 */
973 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
974 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
975 outb(info->MCR, info->ioaddr + UART_MCR);
976
977 /*
978 * Finally, enable interrupts
979 */
980 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
981
982 if (info->board->chip_flag)
983 info->IER |= MOXA_MUST_IER_EGDAI;
984 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
985
986 /*
987 * And clear the interrupt registers again for luck.
988 */
989 (void) inb(info->ioaddr + UART_LSR);
990 (void) inb(info->ioaddr + UART_RX);
991 (void) inb(info->ioaddr + UART_IIR);
992 (void) inb(info->ioaddr + UART_MSR);
993
994 if (info->port.tty)
995 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
996 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
997
998 /*
999 * and set the speed of the serial port
1000 */
1001 mxser_change_speed(info, NULL);
1002 info->port.flags |= ASYNC_INITIALIZED;
1003 spin_unlock_irqrestore(&info->slock, flags);
1004
1005 return 0;
1006 }
1007
1008 /*
1009 * This routine will shutdown a serial port; interrupts maybe disabled, and
1010 * DTR is dropped if the hangup on close termio flag is on.
1011 */
1012 static void mxser_shutdown(struct mxser_port *info)
1013 {
1014 unsigned long flags;
1015
1016 if (!(info->port.flags & ASYNC_INITIALIZED))
1017 return;
1018
1019 spin_lock_irqsave(&info->slock, flags);
1020
1021 /*
1022 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1023 * here so the queue might never be waken up
1024 */
1025 wake_up_interruptible(&info->delta_msr_wait);
1026
1027 /*
1028 * Free the IRQ, if necessary
1029 */
1030 if (info->port.xmit_buf) {
1031 free_page((unsigned long) info->port.xmit_buf);
1032 info->port.xmit_buf = NULL;
1033 }
1034
1035 info->IER = 0;
1036 outb(0x00, info->ioaddr + UART_IER);
1037
1038 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
1039 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
1040 outb(info->MCR, info->ioaddr + UART_MCR);
1041
1042 /* clear Rx/Tx FIFO's */
1043 if (info->board->chip_flag)
1044 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
1045 MOXA_MUST_FCR_GDA_MODE_ENABLE,
1046 info->ioaddr + UART_FCR);
1047 else
1048 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
1049 info->ioaddr + UART_FCR);
1050
1051 /* read data port to reset things */
1052 (void) inb(info->ioaddr + UART_RX);
1053
1054 if (info->port.tty)
1055 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1056
1057 info->port.flags &= ~ASYNC_INITIALIZED;
1058
1059 if (info->board->chip_flag)
1060 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1061
1062 spin_unlock_irqrestore(&info->slock, flags);
1063 }
1064
1065 /*
1066 * This routine is called whenever a serial port is opened. It
1067 * enables interrupts for a serial port, linking in its async structure into
1068 * the IRQ chain. It also performs the serial-specific
1069 * initialization for the tty structure.
1070 */
1071 static int mxser_open(struct tty_struct *tty, struct file *filp)
1072 {
1073 struct mxser_port *info;
1074 unsigned long flags;
1075 int retval, line;
1076
1077 line = tty->index;
1078 if (line == MXSER_PORTS)
1079 return 0;
1080 if (line < 0 || line > MXSER_PORTS)
1081 return -ENODEV;
1082 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1083 if (!info->ioaddr)
1084 return -ENODEV;
1085
1086 tty->driver_data = info;
1087 info->port.tty = tty;
1088 /*
1089 * Start up serial port
1090 */
1091 spin_lock_irqsave(&info->slock, flags);
1092 info->port.count++;
1093 spin_unlock_irqrestore(&info->slock, flags);
1094 retval = mxser_startup(info);
1095 if (retval)
1096 return retval;
1097
1098 retval = mxser_block_til_ready(tty, filp, info);
1099 if (retval)
1100 return retval;
1101
1102 /* unmark here for very high baud rate (ex. 921600 bps) used */
1103 tty->low_latency = 1;
1104 return 0;
1105 }
1106
1107 static void mxser_flush_buffer(struct tty_struct *tty)
1108 {
1109 struct mxser_port *info = tty->driver_data;
1110 char fcr;
1111 unsigned long flags;
1112
1113
1114 spin_lock_irqsave(&info->slock, flags);
1115 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1116
1117 fcr = inb(info->ioaddr + UART_FCR);
1118 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1119 info->ioaddr + UART_FCR);
1120 outb(fcr, info->ioaddr + UART_FCR);
1121
1122 spin_unlock_irqrestore(&info->slock, flags);
1123
1124 tty_wakeup(tty);
1125 }
1126
1127
1128 /*
1129 * This routine is called when the serial port gets closed. First, we
1130 * wait for the last remaining data to be sent. Then, we unlink its
1131 * async structure from the interrupt chain if necessary, and we free
1132 * that IRQ if nothing is left in the chain.
1133 */
1134 static void mxser_close(struct tty_struct *tty, struct file *filp)
1135 {
1136 struct mxser_port *info = tty->driver_data;
1137
1138 unsigned long timeout;
1139 unsigned long flags;
1140
1141 if (tty->index == MXSER_PORTS)
1142 return;
1143 if (!info)
1144 return;
1145
1146 spin_lock_irqsave(&info->slock, flags);
1147
1148 if (tty_hung_up_p(filp)) {
1149 spin_unlock_irqrestore(&info->slock, flags);
1150 return;
1151 }
1152 if ((tty->count == 1) && (info->port.count != 1)) {
1153 /*
1154 * Uh, oh. tty->count is 1, which means that the tty
1155 * structure will be freed. Info->port.count should always
1156 * be one in these conditions. If it's greater than
1157 * one, we've got real problems, since it means the
1158 * serial port won't be shutdown.
1159 */
1160 printk(KERN_ERR "mxser_close: bad serial port count; "
1161 "tty->count is 1, info->port.count is %d\n", info->port.count);
1162 info->port.count = 1;
1163 }
1164 if (--info->port.count < 0) {
1165 printk(KERN_ERR "mxser_close: bad serial port count for "
1166 "ttys%d: %d\n", tty->index, info->port.count);
1167 info->port.count = 0;
1168 }
1169 if (info->port.count) {
1170 spin_unlock_irqrestore(&info->slock, flags);
1171 return;
1172 }
1173 info->port.flags |= ASYNC_CLOSING;
1174 spin_unlock_irqrestore(&info->slock, flags);
1175 /*
1176 * Save the termios structure, since this port may have
1177 * separate termios for callout and dialin.
1178 */
1179 if (info->port.flags & ASYNC_NORMAL_ACTIVE)
1180 info->normal_termios = *tty->termios;
1181 /*
1182 * Now we wait for the transmit buffer to clear; and we notify
1183 * the line discipline to only process XON/XOFF characters.
1184 */
1185 tty->closing = 1;
1186 if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1187 tty_wait_until_sent(tty, info->port.closing_wait);
1188 /*
1189 * At this point we stop accepting input. To do this, we
1190 * disable the receive line status interrupts, and tell the
1191 * interrupt driver to stop checking the data ready bit in the
1192 * line status register.
1193 */
1194 info->IER &= ~UART_IER_RLSI;
1195 if (info->board->chip_flag)
1196 info->IER &= ~MOXA_MUST_RECV_ISR;
1197
1198 if (info->port.flags & ASYNC_INITIALIZED) {
1199 outb(info->IER, info->ioaddr + UART_IER);
1200 /*
1201 * Before we drop DTR, make sure the UART transmitter
1202 * has completely drained; this is especially
1203 * important if there is a transmit FIFO!
1204 */
1205 timeout = jiffies + HZ;
1206 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1207 schedule_timeout_interruptible(5);
1208 if (time_after(jiffies, timeout))
1209 break;
1210 }
1211 }
1212 mxser_shutdown(info);
1213
1214 mxser_flush_buffer(tty);
1215 tty_ldisc_flush(tty);
1216
1217 tty->closing = 0;
1218 info->port.tty = NULL;
1219 if (info->port.blocked_open) {
1220 if (info->port.close_delay)
1221 schedule_timeout_interruptible(info->port.close_delay);
1222 wake_up_interruptible(&info->port.open_wait);
1223 }
1224
1225 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1226 }
1227
1228 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1229 {
1230 int c, total = 0;
1231 struct mxser_port *info = tty->driver_data;
1232 unsigned long flags;
1233
1234 if (!info->port.xmit_buf)
1235 return 0;
1236
1237 while (1) {
1238 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1239 SERIAL_XMIT_SIZE - info->xmit_head));
1240 if (c <= 0)
1241 break;
1242
1243 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1244 spin_lock_irqsave(&info->slock, flags);
1245 info->xmit_head = (info->xmit_head + c) &
1246 (SERIAL_XMIT_SIZE - 1);
1247 info->xmit_cnt += c;
1248 spin_unlock_irqrestore(&info->slock, flags);
1249
1250 buf += c;
1251 count -= c;
1252 total += c;
1253 }
1254
1255 if (info->xmit_cnt && !tty->stopped) {
1256 if (!tty->hw_stopped ||
1257 (info->type == PORT_16550A) ||
1258 (info->board->chip_flag)) {
1259 spin_lock_irqsave(&info->slock, flags);
1260 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1261 UART_IER);
1262 info->IER |= UART_IER_THRI;
1263 outb(info->IER, info->ioaddr + UART_IER);
1264 spin_unlock_irqrestore(&info->slock, flags);
1265 }
1266 }
1267 return total;
1268 }
1269
1270 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1271 {
1272 struct mxser_port *info = tty->driver_data;
1273 unsigned long flags;
1274
1275 if (!info->port.xmit_buf)
1276 return 0;
1277
1278 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1279 return 0;
1280
1281 spin_lock_irqsave(&info->slock, flags);
1282 info->port.xmit_buf[info->xmit_head++] = ch;
1283 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1284 info->xmit_cnt++;
1285 spin_unlock_irqrestore(&info->slock, flags);
1286 if (!tty->stopped) {
1287 if (!tty->hw_stopped ||
1288 (info->type == PORT_16550A) ||
1289 info->board->chip_flag) {
1290 spin_lock_irqsave(&info->slock, flags);
1291 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1292 info->IER |= UART_IER_THRI;
1293 outb(info->IER, info->ioaddr + UART_IER);
1294 spin_unlock_irqrestore(&info->slock, flags);
1295 }
1296 }
1297 return 1;
1298 }
1299
1300
1301 static void mxser_flush_chars(struct tty_struct *tty)
1302 {
1303 struct mxser_port *info = tty->driver_data;
1304 unsigned long flags;
1305
1306 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1307 (tty->hw_stopped && info->type != PORT_16550A &&
1308 !info->board->chip_flag))
1309 return;
1310
1311 spin_lock_irqsave(&info->slock, flags);
1312
1313 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1314 info->IER |= UART_IER_THRI;
1315 outb(info->IER, info->ioaddr + UART_IER);
1316
1317 spin_unlock_irqrestore(&info->slock, flags);
1318 }
1319
1320 static int mxser_write_room(struct tty_struct *tty)
1321 {
1322 struct mxser_port *info = tty->driver_data;
1323 int ret;
1324
1325 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1326 return ret < 0 ? 0 : ret;
1327 }
1328
1329 static int mxser_chars_in_buffer(struct tty_struct *tty)
1330 {
1331 struct mxser_port *info = tty->driver_data;
1332 return info->xmit_cnt;
1333 }
1334
1335 /*
1336 * ------------------------------------------------------------
1337 * friends of mxser_ioctl()
1338 * ------------------------------------------------------------
1339 */
1340 static int mxser_get_serial_info(struct mxser_port *info,
1341 struct serial_struct __user *retinfo)
1342 {
1343 struct serial_struct tmp = {
1344 .type = info->type,
1345 .line = info->port.tty->index,
1346 .port = info->ioaddr,
1347 .irq = info->board->irq,
1348 .flags = info->port.flags,
1349 .baud_base = info->baud_base,
1350 .close_delay = info->port.close_delay,
1351 .closing_wait = info->port.closing_wait,
1352 .custom_divisor = info->custom_divisor,
1353 .hub6 = 0
1354 };
1355 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1356 return -EFAULT;
1357 return 0;
1358 }
1359
1360 static int mxser_set_serial_info(struct mxser_port *info,
1361 struct serial_struct __user *new_info)
1362 {
1363 struct serial_struct new_serial;
1364 speed_t baud;
1365 unsigned long sl_flags;
1366 unsigned int flags;
1367 int retval = 0;
1368
1369 if (!new_info || !info->ioaddr)
1370 return -ENODEV;
1371 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1372 return -EFAULT;
1373
1374 if (new_serial.irq != info->board->irq ||
1375 new_serial.port != info->ioaddr)
1376 return -EINVAL;
1377
1378 flags = info->port.flags & ASYNC_SPD_MASK;
1379
1380 if (!capable(CAP_SYS_ADMIN)) {
1381 if ((new_serial.baud_base != info->baud_base) ||
1382 (new_serial.close_delay != info->port.close_delay) ||
1383 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1384 return -EPERM;
1385 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1386 (new_serial.flags & ASYNC_USR_MASK));
1387 } else {
1388 /*
1389 * OK, past this point, all the error checking has been done.
1390 * At this point, we start making changes.....
1391 */
1392 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1393 (new_serial.flags & ASYNC_FLAGS));
1394 info->port.close_delay = new_serial.close_delay * HZ / 100;
1395 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1396 info->port.tty->low_latency =
1397 (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1398 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1399 (new_serial.baud_base != info->baud_base ||
1400 new_serial.custom_divisor !=
1401 info->custom_divisor)) {
1402 baud = new_serial.baud_base / new_serial.custom_divisor;
1403 tty_encode_baud_rate(info->port.tty, baud, baud);
1404 }
1405 }
1406
1407 info->type = new_serial.type;
1408
1409 process_txrx_fifo(info);
1410
1411 if (info->port.flags & ASYNC_INITIALIZED) {
1412 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1413 spin_lock_irqsave(&info->slock, sl_flags);
1414 mxser_change_speed(info, NULL);
1415 spin_unlock_irqrestore(&info->slock, sl_flags);
1416 }
1417 } else
1418 retval = mxser_startup(info);
1419
1420 return retval;
1421 }
1422
1423 /*
1424 * mxser_get_lsr_info - get line status register info
1425 *
1426 * Purpose: Let user call ioctl() to get info when the UART physically
1427 * is emptied. On bus types like RS485, the transmitter must
1428 * release the bus after transmitting. This must be done when
1429 * the transmit shift register is empty, not be done when the
1430 * transmit holding register is empty. This functionality
1431 * allows an RS485 driver to be written in user space.
1432 */
1433 static int mxser_get_lsr_info(struct mxser_port *info,
1434 unsigned int __user *value)
1435 {
1436 unsigned char status;
1437 unsigned int result;
1438 unsigned long flags;
1439
1440 spin_lock_irqsave(&info->slock, flags);
1441 status = inb(info->ioaddr + UART_LSR);
1442 spin_unlock_irqrestore(&info->slock, flags);
1443 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1444 return put_user(result, value);
1445 }
1446
1447 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1448 {
1449 struct mxser_port *info = tty->driver_data;
1450 unsigned char control, status;
1451 unsigned long flags;
1452
1453
1454 if (tty->index == MXSER_PORTS)
1455 return -ENOIOCTLCMD;
1456 if (test_bit(TTY_IO_ERROR, &tty->flags))
1457 return -EIO;
1458
1459 control = info->MCR;
1460
1461 spin_lock_irqsave(&info->slock, flags);
1462 status = inb(info->ioaddr + UART_MSR);
1463 if (status & UART_MSR_ANY_DELTA)
1464 mxser_check_modem_status(info, status);
1465 spin_unlock_irqrestore(&info->slock, flags);
1466 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1467 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1468 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1469 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1470 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1471 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1472 }
1473
1474 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1475 unsigned int set, unsigned int clear)
1476 {
1477 struct mxser_port *info = tty->driver_data;
1478 unsigned long flags;
1479
1480
1481 if (tty->index == MXSER_PORTS)
1482 return -ENOIOCTLCMD;
1483 if (test_bit(TTY_IO_ERROR, &tty->flags))
1484 return -EIO;
1485
1486 spin_lock_irqsave(&info->slock, flags);
1487
1488 if (set & TIOCM_RTS)
1489 info->MCR |= UART_MCR_RTS;
1490 if (set & TIOCM_DTR)
1491 info->MCR |= UART_MCR_DTR;
1492
1493 if (clear & TIOCM_RTS)
1494 info->MCR &= ~UART_MCR_RTS;
1495 if (clear & TIOCM_DTR)
1496 info->MCR &= ~UART_MCR_DTR;
1497
1498 outb(info->MCR, info->ioaddr + UART_MCR);
1499 spin_unlock_irqrestore(&info->slock, flags);
1500 return 0;
1501 }
1502
1503 static int __init mxser_program_mode(int port)
1504 {
1505 int id, i, j, n;
1506
1507 outb(0, port);
1508 outb(0, port);
1509 outb(0, port);
1510 (void)inb(port);
1511 (void)inb(port);
1512 outb(0, port);
1513 (void)inb(port);
1514
1515 id = inb(port + 1) & 0x1F;
1516 if ((id != C168_ASIC_ID) &&
1517 (id != C104_ASIC_ID) &&
1518 (id != C102_ASIC_ID) &&
1519 (id != CI132_ASIC_ID) &&
1520 (id != CI134_ASIC_ID) &&
1521 (id != CI104J_ASIC_ID))
1522 return -1;
1523 for (i = 0, j = 0; i < 4; i++) {
1524 n = inb(port + 2);
1525 if (n == 'M') {
1526 j = 1;
1527 } else if ((j == 1) && (n == 1)) {
1528 j = 2;
1529 break;
1530 } else
1531 j = 0;
1532 }
1533 if (j != 2)
1534 id = -2;
1535 return id;
1536 }
1537
1538 static void __init mxser_normal_mode(int port)
1539 {
1540 int i, n;
1541
1542 outb(0xA5, port + 1);
1543 outb(0x80, port + 3);
1544 outb(12, port + 0); /* 9600 bps */
1545 outb(0, port + 1);
1546 outb(0x03, port + 3); /* 8 data bits */
1547 outb(0x13, port + 4); /* loop back mode */
1548 for (i = 0; i < 16; i++) {
1549 n = inb(port + 5);
1550 if ((n & 0x61) == 0x60)
1551 break;
1552 if ((n & 1) == 1)
1553 (void)inb(port);
1554 }
1555 outb(0x00, port + 4);
1556 }
1557
1558 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1559 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1560 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1561 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1562 #define EN_CCMD 0x000 /* Chip's command register */
1563 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1564 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1565 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1566 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1567 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1568 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1569 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1570 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1571 static int __init mxser_read_register(int port, unsigned short *regs)
1572 {
1573 int i, k, value, id;
1574 unsigned int j;
1575
1576 id = mxser_program_mode(port);
1577 if (id < 0)
1578 return id;
1579 for (i = 0; i < 14; i++) {
1580 k = (i & 0x3F) | 0x180;
1581 for (j = 0x100; j > 0; j >>= 1) {
1582 outb(CHIP_CS, port);
1583 if (k & j) {
1584 outb(CHIP_CS | CHIP_DO, port);
1585 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1586 } else {
1587 outb(CHIP_CS, port);
1588 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1589 }
1590 }
1591 (void)inb(port);
1592 value = 0;
1593 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1594 outb(CHIP_CS, port);
1595 outb(CHIP_CS | CHIP_SK, port);
1596 if (inb(port) & CHIP_DI)
1597 value |= j;
1598 }
1599 regs[i] = value;
1600 outb(0, port);
1601 }
1602 mxser_normal_mode(port);
1603 return id;
1604 }
1605
1606 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1607 {
1608 struct mxser_port *port;
1609 int result, status;
1610 unsigned int i, j;
1611 int ret = 0;
1612
1613 switch (cmd) {
1614 case MOXA_GET_MAJOR:
1615 if (printk_ratelimit())
1616 printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1617 "%x (GET_MAJOR), fix your userspace\n",
1618 current->comm, cmd);
1619 return put_user(ttymajor, (int __user *)argp);
1620
1621 case MOXA_CHKPORTENABLE:
1622 result = 0;
1623 lock_kernel();
1624 for (i = 0; i < MXSER_BOARDS; i++)
1625 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1626 if (mxser_boards[i].ports[j].ioaddr)
1627 result |= (1 << i);
1628 unlock_kernel();
1629 return put_user(result, (unsigned long __user *)argp);
1630 case MOXA_GETDATACOUNT:
1631 lock_kernel();
1632 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1633 ret = -EFAULT;
1634 unlock_kernel();
1635 return ret;
1636 case MOXA_GETMSTATUS: {
1637 struct mxser_mstatus ms, __user *msu = argp;
1638 lock_kernel();
1639 for (i = 0; i < MXSER_BOARDS; i++)
1640 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1641 port = &mxser_boards[i].ports[j];
1642 memset(&ms, 0, sizeof(ms));
1643
1644 if (!port->ioaddr)
1645 goto copy;
1646
1647 if (!port->port.tty || !port->port.tty->termios)
1648 ms.cflag = port->normal_termios.c_cflag;
1649 else
1650 ms.cflag = port->port.tty->termios->c_cflag;
1651
1652 status = inb(port->ioaddr + UART_MSR);
1653 if (status & UART_MSR_DCD)
1654 ms.dcd = 1;
1655 if (status & UART_MSR_DSR)
1656 ms.dsr = 1;
1657 if (status & UART_MSR_CTS)
1658 ms.cts = 1;
1659 copy:
1660 if (copy_to_user(msu, &ms, sizeof(ms))) {
1661 unlock_kernel();
1662 return -EFAULT;
1663 }
1664 msu++;
1665 }
1666 unlock_kernel();
1667 return 0;
1668 }
1669 case MOXA_ASPP_MON_EXT: {
1670 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1671 unsigned int cflag, iflag, p;
1672 u8 opmode;
1673
1674 me = kzalloc(sizeof(*me), GFP_KERNEL);
1675 if (!me)
1676 return -ENOMEM;
1677
1678 lock_kernel();
1679 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1680 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1681 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1682 i = MXSER_BOARDS;
1683 break;
1684 }
1685 port = &mxser_boards[i].ports[j];
1686 if (!port->ioaddr)
1687 continue;
1688
1689 status = mxser_get_msr(port->ioaddr, 0, p);
1690
1691 if (status & UART_MSR_TERI)
1692 port->icount.rng++;
1693 if (status & UART_MSR_DDSR)
1694 port->icount.dsr++;
1695 if (status & UART_MSR_DDCD)
1696 port->icount.dcd++;
1697 if (status & UART_MSR_DCTS)
1698 port->icount.cts++;
1699
1700 port->mon_data.modem_status = status;
1701 me->rx_cnt[p] = port->mon_data.rxcnt;
1702 me->tx_cnt[p] = port->mon_data.txcnt;
1703 me->up_rxcnt[p] = port->mon_data.up_rxcnt;
1704 me->up_txcnt[p] = port->mon_data.up_txcnt;
1705 me->modem_status[p] =
1706 port->mon_data.modem_status;
1707 me->baudrate[p] = tty_get_baud_rate(port->port.tty);
1708
1709 if (!port->port.tty || !port->port.tty->termios) {
1710 cflag = port->normal_termios.c_cflag;
1711 iflag = port->normal_termios.c_iflag;
1712 } else {
1713 cflag = port->port.tty->termios->c_cflag;
1714 iflag = port->port.tty->termios->c_iflag;
1715 }
1716
1717 me->databits[p] = cflag & CSIZE;
1718 me->stopbits[p] = cflag & CSTOPB;
1719 me->parity[p] = cflag & (PARENB | PARODD |
1720 CMSPAR);
1721
1722 if (cflag & CRTSCTS)
1723 me->flowctrl[p] |= 0x03;
1724
1725 if (iflag & (IXON | IXOFF))
1726 me->flowctrl[p] |= 0x0C;
1727
1728 if (port->type == PORT_16550A)
1729 me->fifo[p] = 1;
1730
1731 opmode = inb(port->opmode_ioaddr) >>
1732 ((p % 4) * 2);
1733 opmode &= OP_MODE_MASK;
1734 me->iftype[p] = opmode;
1735 }
1736 }
1737 unlock_kernel();
1738 if (copy_to_user(argp, me, sizeof(*me)))
1739 ret = -EFAULT;
1740 kfree(me);
1741 return ret;
1742 }
1743 default:
1744 return -ENOIOCTLCMD;
1745 }
1746 return 0;
1747 }
1748
1749 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1750 struct async_icount *cprev)
1751 {
1752 struct async_icount cnow;
1753 unsigned long flags;
1754 int ret;
1755
1756 spin_lock_irqsave(&info->slock, flags);
1757 cnow = info->icount; /* atomic copy */
1758 spin_unlock_irqrestore(&info->slock, flags);
1759
1760 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1761 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1762 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1763 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1764
1765 *cprev = cnow;
1766
1767 return ret;
1768 }
1769
1770 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1771 unsigned int cmd, unsigned long arg)
1772 {
1773 struct mxser_port *info = tty->driver_data;
1774 struct async_icount cnow;
1775 unsigned long flags;
1776 void __user *argp = (void __user *)arg;
1777 int retval;
1778
1779 if (tty->index == MXSER_PORTS)
1780 return mxser_ioctl_special(cmd, argp);
1781
1782 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1783 int p;
1784 unsigned long opmode;
1785 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1786 int shiftbit;
1787 unsigned char val, mask;
1788
1789 p = tty->index % 4;
1790 if (cmd == MOXA_SET_OP_MODE) {
1791 if (get_user(opmode, (int __user *) argp))
1792 return -EFAULT;
1793 if (opmode != RS232_MODE &&
1794 opmode != RS485_2WIRE_MODE &&
1795 opmode != RS422_MODE &&
1796 opmode != RS485_4WIRE_MODE)
1797 return -EFAULT;
1798 lock_kernel();
1799 mask = ModeMask[p];
1800 shiftbit = p * 2;
1801 val = inb(info->opmode_ioaddr);
1802 val &= mask;
1803 val |= (opmode << shiftbit);
1804 outb(val, info->opmode_ioaddr);
1805 unlock_kernel();
1806 } else {
1807 lock_kernel();
1808 shiftbit = p * 2;
1809 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1810 opmode &= OP_MODE_MASK;
1811 unlock_kernel();
1812 if (put_user(opmode, (int __user *)argp))
1813 return -EFAULT;
1814 }
1815 return 0;
1816 }
1817
1818 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1819 test_bit(TTY_IO_ERROR, &tty->flags))
1820 return -EIO;
1821
1822 switch (cmd) {
1823 case TIOCGSERIAL:
1824 lock_kernel();
1825 retval = mxser_get_serial_info(info, argp);
1826 unlock_kernel();
1827 return retval;
1828 case TIOCSSERIAL:
1829 lock_kernel();
1830 retval = mxser_set_serial_info(info, argp);
1831 unlock_kernel();
1832 return retval;
1833 case TIOCSERGETLSR: /* Get line status register */
1834 return mxser_get_lsr_info(info, argp);
1835 /*
1836 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1837 * - mask passed in arg for lines of interest
1838 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1839 * Caller should use TIOCGICOUNT to see which one it was
1840 */
1841 case TIOCMIWAIT:
1842 spin_lock_irqsave(&info->slock, flags);
1843 cnow = info->icount; /* note the counters on entry */
1844 spin_unlock_irqrestore(&info->slock, flags);
1845
1846 return wait_event_interruptible(info->delta_msr_wait,
1847 mxser_cflags_changed(info, arg, &cnow));
1848 /*
1849 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1850 * Return: write counters to the user passed counter struct
1851 * NB: both 1->0 and 0->1 transitions are counted except for
1852 * RI where only 0->1 is counted.
1853 */
1854 case TIOCGICOUNT: {
1855 struct serial_icounter_struct icnt = { 0 };
1856 spin_lock_irqsave(&info->slock, flags);
1857 cnow = info->icount;
1858 spin_unlock_irqrestore(&info->slock, flags);
1859
1860 icnt.frame = cnow.frame;
1861 icnt.brk = cnow.brk;
1862 icnt.overrun = cnow.overrun;
1863 icnt.buf_overrun = cnow.buf_overrun;
1864 icnt.parity = cnow.parity;
1865 icnt.rx = cnow.rx;
1866 icnt.tx = cnow.tx;
1867 icnt.cts = cnow.cts;
1868 icnt.dsr = cnow.dsr;
1869 icnt.rng = cnow.rng;
1870 icnt.dcd = cnow.dcd;
1871
1872 return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0;
1873 }
1874 case MOXA_HighSpeedOn:
1875 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1876 case MOXA_SDS_RSTICOUNTER:
1877 lock_kernel();
1878 info->mon_data.rxcnt = 0;
1879 info->mon_data.txcnt = 0;
1880 unlock_kernel();
1881 return 0;
1882
1883 case MOXA_ASPP_OQUEUE:{
1884 int len, lsr;
1885
1886 lock_kernel();
1887 len = mxser_chars_in_buffer(tty);
1888 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1889 len += (lsr ? 0 : 1);
1890 unlock_kernel();
1891
1892 return put_user(len, (int __user *)argp);
1893 }
1894 case MOXA_ASPP_MON: {
1895 int mcr, status;
1896
1897 lock_kernel();
1898 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1899 mxser_check_modem_status(info, status);
1900
1901 mcr = inb(info->ioaddr + UART_MCR);
1902 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1903 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1904 else
1905 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1906
1907 if (mcr & MOXA_MUST_MCR_TX_XON)
1908 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1909 else
1910 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1911
1912 if (info->port.tty->hw_stopped)
1913 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1914 else
1915 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1916 unlock_kernel();
1917 if (copy_to_user(argp, &info->mon_data,
1918 sizeof(struct mxser_mon)))
1919 return -EFAULT;
1920
1921 return 0;
1922 }
1923 case MOXA_ASPP_LSTATUS: {
1924 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1925 return -EFAULT;
1926
1927 info->err_shadow = 0;
1928 return 0;
1929 }
1930 case MOXA_SET_BAUD_METHOD: {
1931 int method;
1932
1933 if (get_user(method, (int __user *)argp))
1934 return -EFAULT;
1935 mxser_set_baud_method[tty->index] = method;
1936 return put_user(method, (int __user *)argp);
1937 }
1938 default:
1939 return -ENOIOCTLCMD;
1940 }
1941 return 0;
1942 }
1943
1944 static void mxser_stoprx(struct tty_struct *tty)
1945 {
1946 struct mxser_port *info = tty->driver_data;
1947
1948 info->ldisc_stop_rx = 1;
1949 if (I_IXOFF(tty)) {
1950 if (info->board->chip_flag) {
1951 info->IER &= ~MOXA_MUST_RECV_ISR;
1952 outb(info->IER, info->ioaddr + UART_IER);
1953 } else {
1954 info->x_char = STOP_CHAR(tty);
1955 outb(0, info->ioaddr + UART_IER);
1956 info->IER |= UART_IER_THRI;
1957 outb(info->IER, info->ioaddr + UART_IER);
1958 }
1959 }
1960
1961 if (info->port.tty->termios->c_cflag & CRTSCTS) {
1962 info->MCR &= ~UART_MCR_RTS;
1963 outb(info->MCR, info->ioaddr + UART_MCR);
1964 }
1965 }
1966
1967 /*
1968 * This routine is called by the upper-layer tty layer to signal that
1969 * incoming characters should be throttled.
1970 */
1971 static void mxser_throttle(struct tty_struct *tty)
1972 {
1973 mxser_stoprx(tty);
1974 }
1975
1976 static void mxser_unthrottle(struct tty_struct *tty)
1977 {
1978 struct mxser_port *info = tty->driver_data;
1979
1980 /* startrx */
1981 info->ldisc_stop_rx = 0;
1982 if (I_IXOFF(tty)) {
1983 if (info->x_char)
1984 info->x_char = 0;
1985 else {
1986 if (info->board->chip_flag) {
1987 info->IER |= MOXA_MUST_RECV_ISR;
1988 outb(info->IER, info->ioaddr + UART_IER);
1989 } else {
1990 info->x_char = START_CHAR(tty);
1991 outb(0, info->ioaddr + UART_IER);
1992 info->IER |= UART_IER_THRI;
1993 outb(info->IER, info->ioaddr + UART_IER);
1994 }
1995 }
1996 }
1997
1998 if (info->port.tty->termios->c_cflag & CRTSCTS) {
1999 info->MCR |= UART_MCR_RTS;
2000 outb(info->MCR, info->ioaddr + UART_MCR);
2001 }
2002 }
2003
2004 /*
2005 * mxser_stop() and mxser_start()
2006 *
2007 * This routines are called before setting or resetting tty->stopped.
2008 * They enable or disable transmitter interrupts, as necessary.
2009 */
2010 static void mxser_stop(struct tty_struct *tty)
2011 {
2012 struct mxser_port *info = tty->driver_data;
2013 unsigned long flags;
2014
2015 spin_lock_irqsave(&info->slock, flags);
2016 if (info->IER & UART_IER_THRI) {
2017 info->IER &= ~UART_IER_THRI;
2018 outb(info->IER, info->ioaddr + UART_IER);
2019 }
2020 spin_unlock_irqrestore(&info->slock, flags);
2021 }
2022
2023 static void mxser_start(struct tty_struct *tty)
2024 {
2025 struct mxser_port *info = tty->driver_data;
2026 unsigned long flags;
2027
2028 spin_lock_irqsave(&info->slock, flags);
2029 if (info->xmit_cnt && info->port.xmit_buf) {
2030 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
2031 info->IER |= UART_IER_THRI;
2032 outb(info->IER, info->ioaddr + UART_IER);
2033 }
2034 spin_unlock_irqrestore(&info->slock, flags);
2035 }
2036
2037 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2038 {
2039 struct mxser_port *info = tty->driver_data;
2040 unsigned long flags;
2041
2042 spin_lock_irqsave(&info->slock, flags);
2043 mxser_change_speed(info, old_termios);
2044 spin_unlock_irqrestore(&info->slock, flags);
2045
2046 if ((old_termios->c_cflag & CRTSCTS) &&
2047 !(tty->termios->c_cflag & CRTSCTS)) {
2048 tty->hw_stopped = 0;
2049 mxser_start(tty);
2050 }
2051
2052 /* Handle sw stopped */
2053 if ((old_termios->c_iflag & IXON) &&
2054 !(tty->termios->c_iflag & IXON)) {
2055 tty->stopped = 0;
2056
2057 if (info->board->chip_flag) {
2058 spin_lock_irqsave(&info->slock, flags);
2059 mxser_disable_must_rx_software_flow_control(
2060 info->ioaddr);
2061 spin_unlock_irqrestore(&info->slock, flags);
2062 }
2063
2064 mxser_start(tty);
2065 }
2066 }
2067
2068 /*
2069 * mxser_wait_until_sent() --- wait until the transmitter is empty
2070 */
2071 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2072 {
2073 struct mxser_port *info = tty->driver_data;
2074 unsigned long orig_jiffies, char_time;
2075 int lsr;
2076
2077 if (info->type == PORT_UNKNOWN)
2078 return;
2079
2080 if (info->xmit_fifo_size == 0)
2081 return; /* Just in case.... */
2082
2083 orig_jiffies = jiffies;
2084 /*
2085 * Set the check interval to be 1/5 of the estimated time to
2086 * send a single character, and make it at least 1. The check
2087 * interval should also be less than the timeout.
2088 *
2089 * Note: we have to use pretty tight timings here to satisfy
2090 * the NIST-PCTS.
2091 */
2092 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2093 char_time = char_time / 5;
2094 if (char_time == 0)
2095 char_time = 1;
2096 if (timeout && timeout < char_time)
2097 char_time = timeout;
2098 /*
2099 * If the transmitter hasn't cleared in twice the approximate
2100 * amount of time to send the entire FIFO, it probably won't
2101 * ever clear. This assumes the UART isn't doing flow
2102 * control, which is currently the case. Hence, if it ever
2103 * takes longer than info->timeout, this is probably due to a
2104 * UART bug of some kind. So, we clamp the timeout parameter at
2105 * 2*info->timeout.
2106 */
2107 if (!timeout || timeout > 2 * info->timeout)
2108 timeout = 2 * info->timeout;
2109 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2110 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2111 timeout, char_time);
2112 printk("jiff=%lu...", jiffies);
2113 #endif
2114 lock_kernel();
2115 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2116 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2117 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2118 #endif
2119 schedule_timeout_interruptible(char_time);
2120 if (signal_pending(current))
2121 break;
2122 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2123 break;
2124 }
2125 set_current_state(TASK_RUNNING);
2126 unlock_kernel();
2127
2128 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2129 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2130 #endif
2131 }
2132
2133 /*
2134 * This routine is called by tty_hangup() when a hangup is signaled.
2135 */
2136 static void mxser_hangup(struct tty_struct *tty)
2137 {
2138 struct mxser_port *info = tty->driver_data;
2139
2140 mxser_flush_buffer(tty);
2141 mxser_shutdown(info);
2142 info->port.count = 0;
2143 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2144 info->port.tty = NULL;
2145 wake_up_interruptible(&info->port.open_wait);
2146 }
2147
2148 /*
2149 * mxser_rs_break() --- routine which turns the break handling on or off
2150 */
2151 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2152 {
2153 struct mxser_port *info = tty->driver_data;
2154 unsigned long flags;
2155
2156 spin_lock_irqsave(&info->slock, flags);
2157 if (break_state == -1)
2158 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2159 info->ioaddr + UART_LCR);
2160 else
2161 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2162 info->ioaddr + UART_LCR);
2163 spin_unlock_irqrestore(&info->slock, flags);
2164 return 0;
2165 }
2166
2167 static void mxser_receive_chars(struct mxser_port *port, int *status)
2168 {
2169 struct tty_struct *tty = port->port.tty;
2170 unsigned char ch, gdl;
2171 int ignored = 0;
2172 int cnt = 0;
2173 int recv_room;
2174 int max = 256;
2175
2176 recv_room = tty->receive_room;
2177 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2178 mxser_stoprx(tty);
2179
2180 if (port->board->chip_flag != MOXA_OTHER_UART) {
2181
2182 if (*status & UART_LSR_SPECIAL)
2183 goto intr_old;
2184 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2185 (*status & MOXA_MUST_LSR_RERR))
2186 goto intr_old;
2187 if (*status & MOXA_MUST_LSR_RERR)
2188 goto intr_old;
2189
2190 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2191
2192 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2193 gdl &= MOXA_MUST_GDL_MASK;
2194 if (gdl >= recv_room) {
2195 if (!port->ldisc_stop_rx)
2196 mxser_stoprx(tty);
2197 }
2198 while (gdl--) {
2199 ch = inb(port->ioaddr + UART_RX);
2200 tty_insert_flip_char(tty, ch, 0);
2201 cnt++;
2202 }
2203 goto end_intr;
2204 }
2205 intr_old:
2206
2207 do {
2208 if (max-- < 0)
2209 break;
2210
2211 ch = inb(port->ioaddr + UART_RX);
2212 if (port->board->chip_flag && (*status & UART_LSR_OE))
2213 outb(0x23, port->ioaddr + UART_FCR);
2214 *status &= port->read_status_mask;
2215 if (*status & port->ignore_status_mask) {
2216 if (++ignored > 100)
2217 break;
2218 } else {
2219 char flag = 0;
2220 if (*status & UART_LSR_SPECIAL) {
2221 if (*status & UART_LSR_BI) {
2222 flag = TTY_BREAK;
2223 port->icount.brk++;
2224
2225 if (port->port.flags & ASYNC_SAK)
2226 do_SAK(tty);
2227 } else if (*status & UART_LSR_PE) {
2228 flag = TTY_PARITY;
2229 port->icount.parity++;
2230 } else if (*status & UART_LSR_FE) {
2231 flag = TTY_FRAME;
2232 port->icount.frame++;
2233 } else if (*status & UART_LSR_OE) {
2234 flag = TTY_OVERRUN;
2235 port->icount.overrun++;
2236 } else
2237 flag = TTY_BREAK;
2238 }
2239 tty_insert_flip_char(tty, ch, flag);
2240 cnt++;
2241 if (cnt >= recv_room) {
2242 if (!port->ldisc_stop_rx)
2243 mxser_stoprx(tty);
2244 break;
2245 }
2246
2247 }
2248
2249 if (port->board->chip_flag)
2250 break;
2251
2252 *status = inb(port->ioaddr + UART_LSR);
2253 } while (*status & UART_LSR_DR);
2254
2255 end_intr:
2256 mxvar_log.rxcnt[port->port.tty->index] += cnt;
2257 port->mon_data.rxcnt += cnt;
2258 port->mon_data.up_rxcnt += cnt;
2259
2260 /*
2261 * We are called from an interrupt context with &port->slock
2262 * being held. Drop it temporarily in order to prevent
2263 * recursive locking.
2264 */
2265 spin_unlock(&port->slock);
2266 tty_flip_buffer_push(tty);
2267 spin_lock(&port->slock);
2268 }
2269
2270 static void mxser_transmit_chars(struct mxser_port *port)
2271 {
2272 int count, cnt;
2273
2274 if (port->x_char) {
2275 outb(port->x_char, port->ioaddr + UART_TX);
2276 port->x_char = 0;
2277 mxvar_log.txcnt[port->port.tty->index]++;
2278 port->mon_data.txcnt++;
2279 port->mon_data.up_txcnt++;
2280 port->icount.tx++;
2281 return;
2282 }
2283
2284 if (port->port.xmit_buf == NULL)
2285 return;
2286
2287 if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||
2288 (port->port.tty->hw_stopped &&
2289 (port->type != PORT_16550A) &&
2290 (!port->board->chip_flag))) {
2291 port->IER &= ~UART_IER_THRI;
2292 outb(port->IER, port->ioaddr + UART_IER);
2293 return;
2294 }
2295
2296 cnt = port->xmit_cnt;
2297 count = port->xmit_fifo_size;
2298 do {
2299 outb(port->port.xmit_buf[port->xmit_tail++],
2300 port->ioaddr + UART_TX);
2301 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2302 if (--port->xmit_cnt <= 0)
2303 break;
2304 } while (--count > 0);
2305 mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);
2306
2307 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2308 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2309 port->icount.tx += (cnt - port->xmit_cnt);
2310
2311 if (port->xmit_cnt < WAKEUP_CHARS)
2312 tty_wakeup(port->port.tty);
2313
2314 if (port->xmit_cnt <= 0) {
2315 port->IER &= ~UART_IER_THRI;
2316 outb(port->IER, port->ioaddr + UART_IER);
2317 }
2318 }
2319
2320 /*
2321 * This is the serial driver's generic interrupt routine
2322 */
2323 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2324 {
2325 int status, iir, i;
2326 struct mxser_board *brd = NULL;
2327 struct mxser_port *port;
2328 int max, irqbits, bits, msr;
2329 unsigned int int_cnt, pass_counter = 0;
2330 int handled = IRQ_NONE;
2331
2332 for (i = 0; i < MXSER_BOARDS; i++)
2333 if (dev_id == &mxser_boards[i]) {
2334 brd = dev_id;
2335 break;
2336 }
2337
2338 if (i == MXSER_BOARDS)
2339 goto irq_stop;
2340 if (brd == NULL)
2341 goto irq_stop;
2342 max = brd->info->nports;
2343 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2344 irqbits = inb(brd->vector) & brd->vector_mask;
2345 if (irqbits == brd->vector_mask)
2346 break;
2347
2348 handled = IRQ_HANDLED;
2349 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2350 if (irqbits == brd->vector_mask)
2351 break;
2352 if (bits & irqbits)
2353 continue;
2354 port = &brd->ports[i];
2355
2356 int_cnt = 0;
2357 spin_lock(&port->slock);
2358 do {
2359 iir = inb(port->ioaddr + UART_IIR);
2360 if (iir & UART_IIR_NO_INT)
2361 break;
2362 iir &= MOXA_MUST_IIR_MASK;
2363 if (!port->port.tty ||
2364 (port->port.flags & ASYNC_CLOSING) ||
2365 !(port->port.flags &
2366 ASYNC_INITIALIZED)) {
2367 status = inb(port->ioaddr + UART_LSR);
2368 outb(0x27, port->ioaddr + UART_FCR);
2369 inb(port->ioaddr + UART_MSR);
2370 break;
2371 }
2372
2373 status = inb(port->ioaddr + UART_LSR);
2374
2375 if (status & UART_LSR_PE)
2376 port->err_shadow |= NPPI_NOTIFY_PARITY;
2377 if (status & UART_LSR_FE)
2378 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2379 if (status & UART_LSR_OE)
2380 port->err_shadow |=
2381 NPPI_NOTIFY_HW_OVERRUN;
2382 if (status & UART_LSR_BI)
2383 port->err_shadow |= NPPI_NOTIFY_BREAK;
2384
2385 if (port->board->chip_flag) {
2386 if (iir == MOXA_MUST_IIR_GDA ||
2387 iir == MOXA_MUST_IIR_RDA ||
2388 iir == MOXA_MUST_IIR_RTO ||
2389 iir == MOXA_MUST_IIR_LSR)
2390 mxser_receive_chars(port,
2391 &status);
2392
2393 } else {
2394 status &= port->read_status_mask;
2395 if (status & UART_LSR_DR)
2396 mxser_receive_chars(port,
2397 &status);
2398 }
2399 msr = inb(port->ioaddr + UART_MSR);
2400 if (msr & UART_MSR_ANY_DELTA)
2401 mxser_check_modem_status(port, msr);
2402
2403 if (port->board->chip_flag) {
2404 if (iir == 0x02 && (status &
2405 UART_LSR_THRE))
2406 mxser_transmit_chars(port);
2407 } else {
2408 if (status & UART_LSR_THRE)
2409 mxser_transmit_chars(port);
2410 }
2411 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2412 spin_unlock(&port->slock);
2413 }
2414 }
2415
2416 irq_stop:
2417 return handled;
2418 }
2419
2420 static const struct tty_operations mxser_ops = {
2421 .open = mxser_open,
2422 .close = mxser_close,
2423 .write = mxser_write,
2424 .put_char = mxser_put_char,
2425 .flush_chars = mxser_flush_chars,
2426 .write_room = mxser_write_room,
2427 .chars_in_buffer = mxser_chars_in_buffer,
2428 .flush_buffer = mxser_flush_buffer,
2429 .ioctl = mxser_ioctl,
2430 .throttle = mxser_throttle,
2431 .unthrottle = mxser_unthrottle,
2432 .set_termios = mxser_set_termios,
2433 .stop = mxser_stop,
2434 .start = mxser_start,
2435 .hangup = mxser_hangup,
2436 .break_ctl = mxser_rs_break,
2437 .wait_until_sent = mxser_wait_until_sent,
2438 .tiocmget = mxser_tiocmget,
2439 .tiocmset = mxser_tiocmset,
2440 };
2441
2442 /*
2443 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2444 */
2445
2446 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2447 unsigned int irq)
2448 {
2449 if (irq)
2450 free_irq(brd->irq, brd);
2451 if (pdev != NULL) { /* PCI */
2452 #ifdef CONFIG_PCI
2453 pci_release_region(pdev, 2);
2454 pci_release_region(pdev, 3);
2455 #endif
2456 } else {
2457 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2458 release_region(brd->vector, 1);
2459 }
2460 }
2461
2462 static int __devinit mxser_initbrd(struct mxser_board *brd,
2463 struct pci_dev *pdev)
2464 {
2465 struct mxser_port *info;
2466 unsigned int i;
2467 int retval;
2468
2469 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2470 brd->ports[0].max_baud);
2471
2472 for (i = 0; i < brd->info->nports; i++) {
2473 info = &brd->ports[i];
2474 tty_port_init(&info->port);
2475 info->board = brd;
2476 info->stop_rx = 0;
2477 info->ldisc_stop_rx = 0;
2478
2479 /* Enhance mode enabled here */
2480 if (brd->chip_flag != MOXA_OTHER_UART)
2481 mxser_enable_must_enchance_mode(info->ioaddr);
2482
2483 info->port.flags = ASYNC_SHARE_IRQ;
2484 info->type = brd->uart_type;
2485
2486 process_txrx_fifo(info);
2487
2488 info->custom_divisor = info->baud_base * 16;
2489 info->port.close_delay = 5 * HZ / 10;
2490 info->port.closing_wait = 30 * HZ;
2491 info->normal_termios = mxvar_sdriver->init_termios;
2492 init_waitqueue_head(&info->delta_msr_wait);
2493 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2494 info->err_shadow = 0;
2495 spin_lock_init(&info->slock);
2496
2497 /* before set INT ISR, disable all int */
2498 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2499 info->ioaddr + UART_IER);
2500 }
2501
2502 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2503 brd);
2504 if (retval) {
2505 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2506 "conflict with another device.\n",
2507 brd->info->name, brd->irq);
2508 /* We hold resources, we need to release them. */
2509 mxser_release_res(brd, pdev, 0);
2510 }
2511 return retval;
2512 }
2513
2514 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2515 {
2516 int id, i, bits;
2517 unsigned short regs[16], irq;
2518 unsigned char scratch, scratch2;
2519
2520 brd->chip_flag = MOXA_OTHER_UART;
2521
2522 id = mxser_read_register(cap, regs);
2523 switch (id) {
2524 case C168_ASIC_ID:
2525 brd->info = &mxser_cards[0];
2526 break;
2527 case C104_ASIC_ID:
2528 brd->info = &mxser_cards[1];
2529 break;
2530 case CI104J_ASIC_ID:
2531 brd->info = &mxser_cards[2];
2532 break;
2533 case C102_ASIC_ID:
2534 brd->info = &mxser_cards[5];
2535 break;
2536 case CI132_ASIC_ID:
2537 brd->info = &mxser_cards[6];
2538 break;
2539 case CI134_ASIC_ID:
2540 brd->info = &mxser_cards[7];
2541 break;
2542 default:
2543 return 0;
2544 }
2545
2546 irq = 0;
2547 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2548 Flag-hack checks if configuration should be read as 2-port here. */
2549 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2550 irq = regs[9] & 0xF000;
2551 irq = irq | (irq >> 4);
2552 if (irq != (regs[9] & 0xFF00))
2553 goto err_irqconflict;
2554 } else if (brd->info->nports == 4) {
2555 irq = regs[9] & 0xF000;
2556 irq = irq | (irq >> 4);
2557 irq = irq | (irq >> 8);
2558 if (irq != regs[9])
2559 goto err_irqconflict;
2560 } else if (brd->info->nports == 8) {
2561 irq = regs[9] & 0xF000;
2562 irq = irq | (irq >> 4);
2563 irq = irq | (irq >> 8);
2564 if ((irq != regs[9]) || (irq != regs[10]))
2565 goto err_irqconflict;
2566 }
2567
2568 if (!irq) {
2569 printk(KERN_ERR "mxser: interrupt number unset\n");
2570 return -EIO;
2571 }
2572 brd->irq = ((int)(irq & 0xF000) >> 12);
2573 for (i = 0; i < 8; i++)
2574 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2575 if ((regs[12] & 0x80) == 0) {
2576 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2577 return -EIO;
2578 }
2579 brd->vector = (int)regs[11]; /* interrupt vector */
2580 if (id == 1)
2581 brd->vector_mask = 0x00FF;
2582 else
2583 brd->vector_mask = 0x000F;
2584 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2585 if (regs[12] & bits) {
2586 brd->ports[i].baud_base = 921600;
2587 brd->ports[i].max_baud = 921600;
2588 } else {
2589 brd->ports[i].baud_base = 115200;
2590 brd->ports[i].max_baud = 115200;
2591 }
2592 }
2593 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2594 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2595 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2596 outb(scratch2, cap + UART_LCR);
2597 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2598 scratch = inb(cap + UART_IIR);
2599
2600 if (scratch & 0xC0)
2601 brd->uart_type = PORT_16550A;
2602 else
2603 brd->uart_type = PORT_16450;
2604 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2605 "mxser(IO)")) {
2606 printk(KERN_ERR "mxser: can't request ports I/O region: "
2607 "0x%.8lx-0x%.8lx\n",
2608 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2609 8 * brd->info->nports - 1);
2610 return -EIO;
2611 }
2612 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2613 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2614 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2615 "0x%.8lx-0x%.8lx\n",
2616 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2617 8 * brd->info->nports - 1);
2618 return -EIO;
2619 }
2620 return brd->info->nports;
2621
2622 err_irqconflict:
2623 printk(KERN_ERR "mxser: invalid interrupt number\n");
2624 return -EIO;
2625 }
2626
2627 static int __devinit mxser_probe(struct pci_dev *pdev,
2628 const struct pci_device_id *ent)
2629 {
2630 #ifdef CONFIG_PCI
2631 struct mxser_board *brd;
2632 unsigned int i, j;
2633 unsigned long ioaddress;
2634 int retval = -EINVAL;
2635
2636 for (i = 0; i < MXSER_BOARDS; i++)
2637 if (mxser_boards[i].info == NULL)
2638 break;
2639
2640 if (i >= MXSER_BOARDS) {
2641 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2642 "not configured\n", MXSER_BOARDS);
2643 goto err;
2644 }
2645
2646 brd = &mxser_boards[i];
2647 brd->idx = i * MXSER_PORTS_PER_BOARD;
2648 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2649 mxser_cards[ent->driver_data].name,
2650 pdev->bus->number, PCI_SLOT(pdev->devfn));
2651
2652 retval = pci_enable_device(pdev);
2653 if (retval) {
2654 dev_err(&pdev->dev, "PCI enable failed\n");
2655 goto err;
2656 }
2657
2658 /* io address */
2659 ioaddress = pci_resource_start(pdev, 2);
2660 retval = pci_request_region(pdev, 2, "mxser(IO)");
2661 if (retval)
2662 goto err;
2663
2664 brd->info = &mxser_cards[ent->driver_data];
2665 for (i = 0; i < brd->info->nports; i++)
2666 brd->ports[i].ioaddr = ioaddress + 8 * i;
2667
2668 /* vector */
2669 ioaddress = pci_resource_start(pdev, 3);
2670 retval = pci_request_region(pdev, 3, "mxser(vector)");
2671 if (retval)
2672 goto err_relio;
2673 brd->vector = ioaddress;
2674
2675 /* irq */
2676 brd->irq = pdev->irq;
2677
2678 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2679 brd->uart_type = PORT_16550A;
2680 brd->vector_mask = 0;
2681
2682 for (i = 0; i < brd->info->nports; i++) {
2683 for (j = 0; j < UART_INFO_NUM; j++) {
2684 if (Gpci_uart_info[j].type == brd->chip_flag) {
2685 brd->ports[i].max_baud =
2686 Gpci_uart_info[j].max_baud;
2687
2688 /* exception....CP-102 */
2689 if (brd->info->flags & MXSER_HIGHBAUD)
2690 brd->ports[i].max_baud = 921600;
2691 break;
2692 }
2693 }
2694 }
2695
2696 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2697 for (i = 0; i < brd->info->nports; i++) {
2698 if (i < 4)
2699 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2700 else
2701 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2702 }
2703 outb(0, ioaddress + 4); /* default set to RS232 mode */
2704 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2705 }
2706
2707 for (i = 0; i < brd->info->nports; i++) {
2708 brd->vector_mask |= (1 << i);
2709 brd->ports[i].baud_base = 921600;
2710 }
2711
2712 /* mxser_initbrd will hook ISR. */
2713 retval = mxser_initbrd(brd, pdev);
2714 if (retval)
2715 goto err_null;
2716
2717 for (i = 0; i < brd->info->nports; i++)
2718 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2719
2720 pci_set_drvdata(pdev, brd);
2721
2722 return 0;
2723 err_relio:
2724 pci_release_region(pdev, 2);
2725 err_null:
2726 brd->info = NULL;
2727 err:
2728 return retval;
2729 #else
2730 return -ENODEV;
2731 #endif
2732 }
2733
2734 static void __devexit mxser_remove(struct pci_dev *pdev)
2735 {
2736 struct mxser_board *brd = pci_get_drvdata(pdev);
2737 unsigned int i;
2738
2739 for (i = 0; i < brd->info->nports; i++)
2740 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2741
2742 mxser_release_res(brd, pdev, 1);
2743 brd->info = NULL;
2744 }
2745
2746 static struct pci_driver mxser_driver = {
2747 .name = "mxser",
2748 .id_table = mxser_pcibrds,
2749 .probe = mxser_probe,
2750 .remove = __devexit_p(mxser_remove)
2751 };
2752
2753 static int __init mxser_module_init(void)
2754 {
2755 struct mxser_board *brd;
2756 unsigned int b, i, m;
2757 int retval;
2758
2759 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2760 if (!mxvar_sdriver)
2761 return -ENOMEM;
2762
2763 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2764 MXSER_VERSION);
2765
2766 /* Initialize the tty_driver structure */
2767 mxvar_sdriver->owner = THIS_MODULE;
2768 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2769 mxvar_sdriver->name = "ttyMI";
2770 mxvar_sdriver->major = ttymajor;
2771 mxvar_sdriver->minor_start = 0;
2772 mxvar_sdriver->num = MXSER_PORTS + 1;
2773 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2774 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2775 mxvar_sdriver->init_termios = tty_std_termios;
2776 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2777 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2778 tty_set_operations(mxvar_sdriver, &mxser_ops);
2779
2780 retval = tty_register_driver(mxvar_sdriver);
2781 if (retval) {
2782 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2783 "tty driver !\n");
2784 goto err_put;
2785 }
2786
2787 /* Start finding ISA boards here */
2788 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2789 if (!ioaddr[b])
2790 continue;
2791
2792 brd = &mxser_boards[m];
2793 retval = mxser_get_ISA_conf(!ioaddr[b], brd);
2794 if (retval <= 0) {
2795 brd->info = NULL;
2796 continue;
2797 }
2798
2799 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2800 brd->info->name, ioaddr[b]);
2801
2802 /* mxser_initbrd will hook ISR. */
2803 if (mxser_initbrd(brd, NULL) < 0) {
2804 brd->info = NULL;
2805 continue;
2806 }
2807
2808 brd->idx = m * MXSER_PORTS_PER_BOARD;
2809 for (i = 0; i < brd->info->nports; i++)
2810 tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2811
2812 m++;
2813 }
2814
2815 retval = pci_register_driver(&mxser_driver);
2816 if (retval) {
2817 printk(KERN_ERR "mxser: can't register pci driver\n");
2818 if (!m) {
2819 retval = -ENODEV;
2820 goto err_unr;
2821 } /* else: we have some ISA cards under control */
2822 }
2823
2824 return 0;
2825 err_unr:
2826 tty_unregister_driver(mxvar_sdriver);
2827 err_put:
2828 put_tty_driver(mxvar_sdriver);
2829 return retval;
2830 }
2831
2832 static void __exit mxser_module_exit(void)
2833 {
2834 unsigned int i, j;
2835
2836 pci_unregister_driver(&mxser_driver);
2837
2838 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2839 if (mxser_boards[i].info != NULL)
2840 for (j = 0; j < mxser_boards[i].info->nports; j++)
2841 tty_unregister_device(mxvar_sdriver,
2842 mxser_boards[i].idx + j);
2843 tty_unregister_driver(mxvar_sdriver);
2844 put_tty_driver(mxvar_sdriver);
2845
2846 for (i = 0; i < MXSER_BOARDS; i++)
2847 if (mxser_boards[i].info != NULL)
2848 mxser_release_res(&mxser_boards[i], NULL, 1);
2849 }
2850
2851 module_init(mxser_module_init);
2852 module_exit(mxser_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree