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@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
18 * www.moxa.com.
19 * - Fixed x86_64 cleanness
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/ioport.h>
37 #include <linux/mm.h>
38 #include <linux/delay.h>
39 #include <linux/pci.h>
40 #include <linux/bitops.h>
41 #include <linux/slab.h>
42 #include <linux/ratelimit.h>
43
44 #include <asm/io.h>
45 #include <asm/irq.h>
46 #include <linux/uaccess.h>
47
48 #include "mxser.h"
49
50 #define MXSER_VERSION "2.0.5" /* 1.14 */
51 #define MXSERMAJOR 174
52
53 #define MXSER_BOARDS 4 /* Max. boards */
54 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
55 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
56 #define MXSER_ISR_PASS_LIMIT 100
57
58 /*CheckIsMoxaMust return value*/
59 #define MOXA_OTHER_UART 0x00
60 #define MOXA_MUST_MU150_HWID 0x01
61 #define MOXA_MUST_MU860_HWID 0x02
62
63 #define WAKEUP_CHARS 256
64
65 #define UART_MCR_AFE 0x20
66 #define UART_LSR_SPECIAL 0x1E
67
68 #define PCI_DEVICE_ID_POS104UL 0x1044
69 #define PCI_DEVICE_ID_CB108 0x1080
70 #define PCI_DEVICE_ID_CP102UF 0x1023
71 #define PCI_DEVICE_ID_CP112UL 0x1120
72 #define PCI_DEVICE_ID_CB114 0x1142
73 #define PCI_DEVICE_ID_CP114UL 0x1143
74 #define PCI_DEVICE_ID_CB134I 0x1341
75 #define PCI_DEVICE_ID_CP138U 0x1380
76
77
78 #define C168_ASIC_ID 1
79 #define C104_ASIC_ID 2
80 #define C102_ASIC_ID 0xB
81 #define CI132_ASIC_ID 4
82 #define CI134_ASIC_ID 3
83 #define CI104J_ASIC_ID 5
84
85 #define MXSER_HIGHBAUD 1
86 #define MXSER_HAS2 2
87
88 /* This is only for PCI */
89 static const struct {
90 int type;
91 int tx_fifo;
92 int rx_fifo;
93 int xmit_fifo_size;
94 int rx_high_water;
95 int rx_trigger;
96 int rx_low_water;
97 long max_baud;
98 } Gpci_uart_info[] = {
99 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
100 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
101 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
102 };
103 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
104
105 struct mxser_cardinfo {
106 char *name;
107 unsigned int nports;
108 unsigned int flags;
109 };
110
111 static const struct mxser_cardinfo mxser_cards[] = {
112 /* 0*/ { "C168 series", 8, },
113 { "C104 series", 4, },
114 { "CI-104J series", 4, },
115 { "C168H/PCI series", 8, },
116 { "C104H/PCI series", 4, },
117 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
118 { "CI-132 series", 4, MXSER_HAS2 },
119 { "CI-134 series", 4, },
120 { "CP-132 series", 2, },
121 { "CP-114 series", 4, },
122 /*10*/ { "CT-114 series", 4, },
123 { "CP-102 series", 2, MXSER_HIGHBAUD },
124 { "CP-104U series", 4, },
125 { "CP-168U series", 8, },
126 { "CP-132U series", 2, },
127 /*15*/ { "CP-134U series", 4, },
128 { "CP-104JU series", 4, },
129 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
130 { "CP-118U series", 8, },
131 { "CP-102UL series", 2, },
132 /*20*/ { "CP-102U series", 2, },
133 { "CP-118EL series", 8, },
134 { "CP-168EL series", 8, },
135 { "CP-104EL series", 4, },
136 { "CB-108 series", 8, },
137 /*25*/ { "CB-114 series", 4, },
138 { "CB-134I series", 4, },
139 { "CP-138U series", 8, },
140 { "POS-104UL series", 4, },
141 { "CP-114UL series", 4, },
142 /*30*/ { "CP-102UF series", 2, },
143 { "CP-112UL series", 2, },
144 };
145
146 /* driver_data correspond to the lines in the structure above
147 see also ISA probe function before you change something */
148 static const struct pci_device_id mxser_pcibrds[] = {
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
175 { }
176 };
177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
178
179 static unsigned long ioaddr[MXSER_BOARDS];
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_hw_array(ioaddr, ulong, ioport, NULL, 0);
187 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
188 module_param(ttymajor, int, 0);
189 MODULE_LICENSE("GPL");
190
191 struct mxser_log {
192 int tick;
193 unsigned long rxcnt[MXSER_PORTS];
194 unsigned long txcnt[MXSER_PORTS];
195 };
196
197 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 unsigned int timeout;
250
251 int read_status_mask;
252 int ignore_status_mask;
253 unsigned int xmit_fifo_size;
254 int xmit_head;
255 int xmit_tail;
256 int xmit_cnt;
257 int closing;
258
259 struct ktermios normal_termios;
260
261 struct mxser_mon mon_data;
262
263 spinlock_t slock;
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_board mxser_boards[MXSER_BOARDS];
288 static struct tty_driver *mxvar_sdriver;
289 static struct mxser_log mxvar_log;
290 static int mxser_set_baud_method[MXSER_PORTS + 1];
291
mxser_enable_must_enchance_mode(unsigned long baseio)292 static void mxser_enable_must_enchance_mode(unsigned long baseio)
293 {
294 u8 oldlcr;
295 u8 efr;
296
297 oldlcr = inb(baseio + UART_LCR);
298 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
299
300 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
301 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
302
303 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
304 outb(oldlcr, baseio + UART_LCR);
305 }
306
307 #ifdef CONFIG_PCI
mxser_disable_must_enchance_mode(unsigned long baseio)308 static void mxser_disable_must_enchance_mode(unsigned long baseio)
309 {
310 u8 oldlcr;
311 u8 efr;
312
313 oldlcr = inb(baseio + UART_LCR);
314 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
315
316 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
317 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
318
319 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
320 outb(oldlcr, baseio + UART_LCR);
321 }
322 #endif
323
mxser_set_must_xon1_value(unsigned long baseio,u8 value)324 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
325 {
326 u8 oldlcr;
327 u8 efr;
328
329 oldlcr = inb(baseio + UART_LCR);
330 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
331
332 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
333 efr &= ~MOXA_MUST_EFR_BANK_MASK;
334 efr |= MOXA_MUST_EFR_BANK0;
335
336 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
337 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
338 outb(oldlcr, baseio + UART_LCR);
339 }
340
mxser_set_must_xoff1_value(unsigned long baseio,u8 value)341 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
342 {
343 u8 oldlcr;
344 u8 efr;
345
346 oldlcr = inb(baseio + UART_LCR);
347 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
348
349 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
350 efr &= ~MOXA_MUST_EFR_BANK_MASK;
351 efr |= MOXA_MUST_EFR_BANK0;
352
353 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
354 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
355 outb(oldlcr, baseio + UART_LCR);
356 }
357
mxser_set_must_fifo_value(struct mxser_port * info)358 static void mxser_set_must_fifo_value(struct mxser_port *info)
359 {
360 u8 oldlcr;
361 u8 efr;
362
363 oldlcr = inb(info->ioaddr + UART_LCR);
364 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
365
366 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
367 efr &= ~MOXA_MUST_EFR_BANK_MASK;
368 efr |= MOXA_MUST_EFR_BANK1;
369
370 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
371 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
372 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
373 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
374 outb(oldlcr, info->ioaddr + UART_LCR);
375 }
376
mxser_set_must_enum_value(unsigned long baseio,u8 value)377 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
378 {
379 u8 oldlcr;
380 u8 efr;
381
382 oldlcr = inb(baseio + UART_LCR);
383 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
384
385 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
386 efr &= ~MOXA_MUST_EFR_BANK_MASK;
387 efr |= MOXA_MUST_EFR_BANK2;
388
389 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
390 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
391 outb(oldlcr, baseio + UART_LCR);
392 }
393
394 #ifdef CONFIG_PCI
mxser_get_must_hardware_id(unsigned long baseio,u8 * pId)395 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
396 {
397 u8 oldlcr;
398 u8 efr;
399
400 oldlcr = inb(baseio + UART_LCR);
401 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
402
403 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
404 efr &= ~MOXA_MUST_EFR_BANK_MASK;
405 efr |= MOXA_MUST_EFR_BANK2;
406
407 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
408 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
409 outb(oldlcr, baseio + UART_LCR);
410 }
411 #endif
412
SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)413 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
414 {
415 u8 oldlcr;
416 u8 efr;
417
418 oldlcr = inb(baseio + UART_LCR);
419 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
420
421 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
422 efr &= ~MOXA_MUST_EFR_SF_MASK;
423
424 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
425 outb(oldlcr, baseio + UART_LCR);
426 }
427
mxser_enable_must_tx_software_flow_control(unsigned long baseio)428 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
429 {
430 u8 oldlcr;
431 u8 efr;
432
433 oldlcr = inb(baseio + UART_LCR);
434 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
435
436 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
437 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
438 efr |= MOXA_MUST_EFR_SF_TX1;
439
440 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
441 outb(oldlcr, baseio + UART_LCR);
442 }
443
mxser_disable_must_tx_software_flow_control(unsigned long baseio)444 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
445 {
446 u8 oldlcr;
447 u8 efr;
448
449 oldlcr = inb(baseio + UART_LCR);
450 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
451
452 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
453 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
454
455 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
456 outb(oldlcr, baseio + UART_LCR);
457 }
458
mxser_enable_must_rx_software_flow_control(unsigned long baseio)459 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
460 {
461 u8 oldlcr;
462 u8 efr;
463
464 oldlcr = inb(baseio + UART_LCR);
465 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
466
467 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
468 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
469 efr |= MOXA_MUST_EFR_SF_RX1;
470
471 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
472 outb(oldlcr, baseio + UART_LCR);
473 }
474
mxser_disable_must_rx_software_flow_control(unsigned long baseio)475 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
476 {
477 u8 oldlcr;
478 u8 efr;
479
480 oldlcr = inb(baseio + UART_LCR);
481 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
482
483 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
484 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
485
486 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
487 outb(oldlcr, baseio + UART_LCR);
488 }
489
490 #ifdef CONFIG_PCI
CheckIsMoxaMust(unsigned long io)491 static int CheckIsMoxaMust(unsigned long io)
492 {
493 u8 oldmcr, hwid;
494 int i;
495
496 outb(0, io + UART_LCR);
497 mxser_disable_must_enchance_mode(io);
498 oldmcr = inb(io + UART_MCR);
499 outb(0, io + UART_MCR);
500 mxser_set_must_xon1_value(io, 0x11);
501 if ((hwid = inb(io + UART_MCR)) != 0) {
502 outb(oldmcr, io + UART_MCR);
503 return MOXA_OTHER_UART;
504 }
505
506 mxser_get_must_hardware_id(io, &hwid);
507 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
508 if (hwid == Gpci_uart_info[i].type)
509 return (int)hwid;
510 }
511 return MOXA_OTHER_UART;
512 }
513 #endif
514
process_txrx_fifo(struct mxser_port * info)515 static void process_txrx_fifo(struct mxser_port *info)
516 {
517 int i;
518
519 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
520 info->rx_trigger = 1;
521 info->rx_high_water = 1;
522 info->rx_low_water = 1;
523 info->xmit_fifo_size = 1;
524 } else
525 for (i = 0; i < UART_INFO_NUM; i++)
526 if (info->board->chip_flag == Gpci_uart_info[i].type) {
527 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
528 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
529 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
530 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
531 break;
532 }
533 }
534
mxser_get_msr(int baseaddr,int mode,int port)535 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
536 {
537 static unsigned char mxser_msr[MXSER_PORTS + 1];
538 unsigned char status = 0;
539
540 status = inb(baseaddr + UART_MSR);
541
542 mxser_msr[port] &= 0x0F;
543 mxser_msr[port] |= status;
544 status = mxser_msr[port];
545 if (mode)
546 mxser_msr[port] = 0;
547
548 return status;
549 }
550
mxser_carrier_raised(struct tty_port * port)551 static int mxser_carrier_raised(struct tty_port *port)
552 {
553 struct mxser_port *mp = container_of(port, struct mxser_port, port);
554 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
555 }
556
mxser_dtr_rts(struct tty_port * port,int on)557 static void mxser_dtr_rts(struct tty_port *port, int on)
558 {
559 struct mxser_port *mp = container_of(port, struct mxser_port, port);
560 unsigned long flags;
561
562 spin_lock_irqsave(&mp->slock, flags);
563 if (on)
564 outb(inb(mp->ioaddr + UART_MCR) |
565 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
566 else
567 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
568 mp->ioaddr + UART_MCR);
569 spin_unlock_irqrestore(&mp->slock, flags);
570 }
571
mxser_set_baud(struct tty_struct * tty,long newspd)572 static int mxser_set_baud(struct tty_struct *tty, long newspd)
573 {
574 struct mxser_port *info = tty->driver_data;
575 unsigned int quot = 0, baud;
576 unsigned char cval;
577 u64 timeout;
578
579 if (!info->ioaddr)
580 return -1;
581
582 if (newspd > info->max_baud)
583 return -1;
584
585 if (newspd == 134) {
586 quot = 2 * info->baud_base / 269;
587 tty_encode_baud_rate(tty, 134, 134);
588 } else if (newspd) {
589 quot = info->baud_base / newspd;
590 if (quot == 0)
591 quot = 1;
592 baud = info->baud_base/quot;
593 tty_encode_baud_rate(tty, baud, baud);
594 } else {
595 quot = 0;
596 }
597
598 /*
599 * worst case (128 * 1000 * 10 * 18432) needs 35 bits, so divide in the
600 * u64 domain
601 */
602 timeout = (u64)info->xmit_fifo_size * HZ * 10 * quot;
603 do_div(timeout, info->baud_base);
604 info->timeout = timeout + HZ / 50; /* Add .02 seconds of slop */
605
606 if (quot) {
607 info->MCR |= UART_MCR_DTR;
608 outb(info->MCR, info->ioaddr + UART_MCR);
609 } else {
610 info->MCR &= ~UART_MCR_DTR;
611 outb(info->MCR, info->ioaddr + UART_MCR);
612 return 0;
613 }
614
615 cval = inb(info->ioaddr + UART_LCR);
616
617 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
618
619 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
620 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
621 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
622
623 #ifdef BOTHER
624 if (C_BAUD(tty) == BOTHER) {
625 quot = info->baud_base % newspd;
626 quot *= 8;
627 if (quot % newspd > newspd / 2) {
628 quot /= newspd;
629 quot++;
630 } else
631 quot /= newspd;
632
633 mxser_set_must_enum_value(info->ioaddr, quot);
634 } else
635 #endif
636 mxser_set_must_enum_value(info->ioaddr, 0);
637
638 return 0;
639 }
640
641 /*
642 * This routine is called to set the UART divisor registers to match
643 * the specified baud rate for a serial port.
644 */
mxser_change_speed(struct tty_struct * tty,struct ktermios * old_termios)645 static int mxser_change_speed(struct tty_struct *tty,
646 struct ktermios *old_termios)
647 {
648 struct mxser_port *info = tty->driver_data;
649 unsigned cflag, cval, fcr;
650 int ret = 0;
651 unsigned char status;
652
653 cflag = tty->termios.c_cflag;
654 if (!info->ioaddr)
655 return ret;
656
657 if (mxser_set_baud_method[tty->index] == 0)
658 mxser_set_baud(tty, tty_get_baud_rate(tty));
659
660 /* byte size and parity */
661 switch (cflag & CSIZE) {
662 case CS5:
663 cval = 0x00;
664 break;
665 case CS6:
666 cval = 0x01;
667 break;
668 case CS7:
669 cval = 0x02;
670 break;
671 case CS8:
672 cval = 0x03;
673 break;
674 default:
675 cval = 0x00;
676 break; /* too keep GCC shut... */
677 }
678 if (cflag & CSTOPB)
679 cval |= 0x04;
680 if (cflag & PARENB)
681 cval |= UART_LCR_PARITY;
682 if (!(cflag & PARODD))
683 cval |= UART_LCR_EPAR;
684 if (cflag & CMSPAR)
685 cval |= UART_LCR_SPAR;
686
687 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
688 if (info->board->chip_flag) {
689 fcr = UART_FCR_ENABLE_FIFO;
690 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
691 mxser_set_must_fifo_value(info);
692 } else
693 fcr = 0;
694 } else {
695 fcr = UART_FCR_ENABLE_FIFO;
696 if (info->board->chip_flag) {
697 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
698 mxser_set_must_fifo_value(info);
699 } else {
700 switch (info->rx_trigger) {
701 case 1:
702 fcr |= UART_FCR_TRIGGER_1;
703 break;
704 case 4:
705 fcr |= UART_FCR_TRIGGER_4;
706 break;
707 case 8:
708 fcr |= UART_FCR_TRIGGER_8;
709 break;
710 default:
711 fcr |= UART_FCR_TRIGGER_14;
712 break;
713 }
714 }
715 }
716
717 /* CTS flow control flag and modem status interrupts */
718 info->IER &= ~UART_IER_MSI;
719 info->MCR &= ~UART_MCR_AFE;
720 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
721 if (cflag & CRTSCTS) {
722 info->IER |= UART_IER_MSI;
723 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
724 info->MCR |= UART_MCR_AFE;
725 } else {
726 status = inb(info->ioaddr + UART_MSR);
727 if (tty->hw_stopped) {
728 if (status & UART_MSR_CTS) {
729 tty->hw_stopped = 0;
730 if (info->type != PORT_16550A &&
731 !info->board->chip_flag) {
732 outb(info->IER & ~UART_IER_THRI,
733 info->ioaddr +
734 UART_IER);
735 info->IER |= UART_IER_THRI;
736 outb(info->IER, info->ioaddr +
737 UART_IER);
738 }
739 tty_wakeup(tty);
740 }
741 } else {
742 if (!(status & UART_MSR_CTS)) {
743 tty->hw_stopped = 1;
744 if ((info->type != PORT_16550A) &&
745 (!info->board->chip_flag)) {
746 info->IER &= ~UART_IER_THRI;
747 outb(info->IER, info->ioaddr +
748 UART_IER);
749 }
750 }
751 }
752 }
753 }
754 outb(info->MCR, info->ioaddr + UART_MCR);
755 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
756 if (~cflag & CLOCAL)
757 info->IER |= UART_IER_MSI;
758 outb(info->IER, info->ioaddr + UART_IER);
759
760 /*
761 * Set up parity check flag
762 */
763 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
764 if (I_INPCK(tty))
765 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
766 if (I_BRKINT(tty) || I_PARMRK(tty))
767 info->read_status_mask |= UART_LSR_BI;
768
769 info->ignore_status_mask = 0;
770
771 if (I_IGNBRK(tty)) {
772 info->ignore_status_mask |= UART_LSR_BI;
773 info->read_status_mask |= UART_LSR_BI;
774 /*
775 * If we're ignore parity and break indicators, ignore
776 * overruns too. (For real raw support).
777 */
778 if (I_IGNPAR(tty)) {
779 info->ignore_status_mask |=
780 UART_LSR_OE |
781 UART_LSR_PE |
782 UART_LSR_FE;
783 info->read_status_mask |=
784 UART_LSR_OE |
785 UART_LSR_PE |
786 UART_LSR_FE;
787 }
788 }
789 if (info->board->chip_flag) {
790 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
791 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
792 if (I_IXON(tty)) {
793 mxser_enable_must_rx_software_flow_control(
794 info->ioaddr);
795 } else {
796 mxser_disable_must_rx_software_flow_control(
797 info->ioaddr);
798 }
799 if (I_IXOFF(tty)) {
800 mxser_enable_must_tx_software_flow_control(
801 info->ioaddr);
802 } else {
803 mxser_disable_must_tx_software_flow_control(
804 info->ioaddr);
805 }
806 }
807
808
809 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
810 outb(cval, info->ioaddr + UART_LCR);
811
812 return ret;
813 }
814
mxser_check_modem_status(struct tty_struct * tty,struct mxser_port * port,int status)815 static void mxser_check_modem_status(struct tty_struct *tty,
816 struct mxser_port *port, int status)
817 {
818 /* update input line counters */
819 if (status & UART_MSR_TERI)
820 port->icount.rng++;
821 if (status & UART_MSR_DDSR)
822 port->icount.dsr++;
823 if (status & UART_MSR_DDCD)
824 port->icount.dcd++;
825 if (status & UART_MSR_DCTS)
826 port->icount.cts++;
827 port->mon_data.modem_status = status;
828 wake_up_interruptible(&port->port.delta_msr_wait);
829
830 if (tty_port_check_carrier(&port->port) && (status & UART_MSR_DDCD)) {
831 if (status & UART_MSR_DCD)
832 wake_up_interruptible(&port->port.open_wait);
833 }
834
835 if (tty_port_cts_enabled(&port->port)) {
836 if (tty->hw_stopped) {
837 if (status & UART_MSR_CTS) {
838 tty->hw_stopped = 0;
839
840 if ((port->type != PORT_16550A) &&
841 (!port->board->chip_flag)) {
842 outb(port->IER & ~UART_IER_THRI,
843 port->ioaddr + UART_IER);
844 port->IER |= UART_IER_THRI;
845 outb(port->IER, port->ioaddr +
846 UART_IER);
847 }
848 tty_wakeup(tty);
849 }
850 } else {
851 if (!(status & UART_MSR_CTS)) {
852 tty->hw_stopped = 1;
853 if (port->type != PORT_16550A &&
854 !port->board->chip_flag) {
855 port->IER &= ~UART_IER_THRI;
856 outb(port->IER, port->ioaddr +
857 UART_IER);
858 }
859 }
860 }
861 }
862 }
863
mxser_activate(struct tty_port * port,struct tty_struct * tty)864 static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
865 {
866 struct mxser_port *info = container_of(port, struct mxser_port, port);
867 unsigned long page;
868 unsigned long flags;
869
870 page = __get_free_page(GFP_KERNEL);
871 if (!page)
872 return -ENOMEM;
873
874 spin_lock_irqsave(&info->slock, flags);
875
876 if (!info->ioaddr || !info->type) {
877 set_bit(TTY_IO_ERROR, &tty->flags);
878 free_page(page);
879 spin_unlock_irqrestore(&info->slock, flags);
880 return 0;
881 }
882 info->port.xmit_buf = (unsigned char *) page;
883
884 /*
885 * Clear the FIFO buffers and disable them
886 * (they will be reenabled in mxser_change_speed())
887 */
888 if (info->board->chip_flag)
889 outb((UART_FCR_CLEAR_RCVR |
890 UART_FCR_CLEAR_XMIT |
891 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
892 else
893 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
894 info->ioaddr + UART_FCR);
895
896 /*
897 * At this point there's no way the LSR could still be 0xFF;
898 * if it is, then bail out, because there's likely no UART
899 * here.
900 */
901 if (inb(info->ioaddr + UART_LSR) == 0xff) {
902 spin_unlock_irqrestore(&info->slock, flags);
903 if (capable(CAP_SYS_ADMIN)) {
904 set_bit(TTY_IO_ERROR, &tty->flags);
905 return 0;
906 } else
907 return -ENODEV;
908 }
909
910 /*
911 * Clear the interrupt registers.
912 */
913 (void) inb(info->ioaddr + UART_LSR);
914 (void) inb(info->ioaddr + UART_RX);
915 (void) inb(info->ioaddr + UART_IIR);
916 (void) inb(info->ioaddr + UART_MSR);
917
918 /*
919 * Now, initialize the UART
920 */
921 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
922 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
923 outb(info->MCR, info->ioaddr + UART_MCR);
924
925 /*
926 * Finally, enable interrupts
927 */
928 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
929
930 if (info->board->chip_flag)
931 info->IER |= MOXA_MUST_IER_EGDAI;
932 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
933
934 /*
935 * And clear the interrupt registers again for luck.
936 */
937 (void) inb(info->ioaddr + UART_LSR);
938 (void) inb(info->ioaddr + UART_RX);
939 (void) inb(info->ioaddr + UART_IIR);
940 (void) inb(info->ioaddr + UART_MSR);
941
942 clear_bit(TTY_IO_ERROR, &tty->flags);
943 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
944
945 /*
946 * and set the speed of the serial port
947 */
948 mxser_change_speed(tty, NULL);
949 spin_unlock_irqrestore(&info->slock, flags);
950
951 return 0;
952 }
953
954 /*
955 * This routine will shutdown a serial port
956 */
mxser_shutdown_port(struct tty_port * port)957 static void mxser_shutdown_port(struct tty_port *port)
958 {
959 struct mxser_port *info = container_of(port, struct mxser_port, port);
960 unsigned long flags;
961
962 spin_lock_irqsave(&info->slock, flags);
963
964 /*
965 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
966 * here so the queue might never be waken up
967 */
968 wake_up_interruptible(&info->port.delta_msr_wait);
969
970 /*
971 * Free the xmit buffer, if necessary
972 */
973 if (info->port.xmit_buf) {
974 free_page((unsigned long) info->port.xmit_buf);
975 info->port.xmit_buf = NULL;
976 }
977
978 info->IER = 0;
979 outb(0x00, info->ioaddr + UART_IER);
980
981 /* clear Rx/Tx FIFO's */
982 if (info->board->chip_flag)
983 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
984 MOXA_MUST_FCR_GDA_MODE_ENABLE,
985 info->ioaddr + UART_FCR);
986 else
987 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
988 info->ioaddr + UART_FCR);
989
990 /* read data port to reset things */
991 (void) inb(info->ioaddr + UART_RX);
992
993
994 if (info->board->chip_flag)
995 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
996
997 spin_unlock_irqrestore(&info->slock, flags);
998 }
999
1000 /*
1001 * This routine is called whenever a serial port is opened. It
1002 * enables interrupts for a serial port, linking in its async structure into
1003 * the IRQ chain. It also performs the serial-specific
1004 * initialization for the tty structure.
1005 */
mxser_open(struct tty_struct * tty,struct file * filp)1006 static int mxser_open(struct tty_struct *tty, struct file *filp)
1007 {
1008 struct mxser_port *info;
1009 int line;
1010
1011 line = tty->index;
1012 if (line == MXSER_PORTS)
1013 return 0;
1014 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1015 if (!info->ioaddr)
1016 return -ENODEV;
1017
1018 tty->driver_data = info;
1019 return tty_port_open(&info->port, tty, filp);
1020 }
1021
mxser_flush_buffer(struct tty_struct * tty)1022 static void mxser_flush_buffer(struct tty_struct *tty)
1023 {
1024 struct mxser_port *info = tty->driver_data;
1025 char fcr;
1026 unsigned long flags;
1027
1028
1029 spin_lock_irqsave(&info->slock, flags);
1030 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1031
1032 fcr = inb(info->ioaddr + UART_FCR);
1033 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1034 info->ioaddr + UART_FCR);
1035 outb(fcr, info->ioaddr + UART_FCR);
1036
1037 spin_unlock_irqrestore(&info->slock, flags);
1038
1039 tty_wakeup(tty);
1040 }
1041
1042
mxser_close_port(struct tty_port * port)1043 static void mxser_close_port(struct tty_port *port)
1044 {
1045 struct mxser_port *info = container_of(port, struct mxser_port, port);
1046 unsigned long timeout;
1047 /*
1048 * At this point we stop accepting input. To do this, we
1049 * disable the receive line status interrupts, and tell the
1050 * interrupt driver to stop checking the data ready bit in the
1051 * line status register.
1052 */
1053 info->IER &= ~UART_IER_RLSI;
1054 if (info->board->chip_flag)
1055 info->IER &= ~MOXA_MUST_RECV_ISR;
1056
1057 outb(info->IER, info->ioaddr + UART_IER);
1058 /*
1059 * Before we drop DTR, make sure the UART transmitter
1060 * has completely drained; this is especially
1061 * important if there is a transmit FIFO!
1062 */
1063 timeout = jiffies + HZ;
1064 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1065 schedule_timeout_interruptible(5);
1066 if (time_after(jiffies, timeout))
1067 break;
1068 }
1069 }
1070
1071 /*
1072 * This routine is called when the serial port gets closed. First, we
1073 * wait for the last remaining data to be sent. Then, we unlink its
1074 * async structure from the interrupt chain if necessary, and we free
1075 * that IRQ if nothing is left in the chain.
1076 */
mxser_close(struct tty_struct * tty,struct file * filp)1077 static void mxser_close(struct tty_struct *tty, struct file *filp)
1078 {
1079 struct mxser_port *info = tty->driver_data;
1080 struct tty_port *port = &info->port;
1081
1082 if (tty->index == MXSER_PORTS || info == NULL)
1083 return;
1084 if (tty_port_close_start(port, tty, filp) == 0)
1085 return;
1086 info->closing = 1;
1087 mutex_lock(&port->mutex);
1088 mxser_close_port(port);
1089 mxser_flush_buffer(tty);
1090 if (tty_port_initialized(port) && C_HUPCL(tty))
1091 tty_port_lower_dtr_rts(port);
1092 mxser_shutdown_port(port);
1093 tty_port_set_initialized(port, 0);
1094 mutex_unlock(&port->mutex);
1095 info->closing = 0;
1096 /* Right now the tty_port set is done outside of the close_end helper
1097 as we don't yet have everyone using refcounts */
1098 tty_port_close_end(port, tty);
1099 tty_port_tty_set(port, NULL);
1100 }
1101
mxser_write(struct tty_struct * tty,const unsigned char * buf,int count)1102 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1103 {
1104 int c, total = 0;
1105 struct mxser_port *info = tty->driver_data;
1106 unsigned long flags;
1107
1108 if (!info->port.xmit_buf)
1109 return 0;
1110
1111 while (1) {
1112 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1113 SERIAL_XMIT_SIZE - info->xmit_head));
1114 if (c <= 0)
1115 break;
1116
1117 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1118 spin_lock_irqsave(&info->slock, flags);
1119 info->xmit_head = (info->xmit_head + c) &
1120 (SERIAL_XMIT_SIZE - 1);
1121 info->xmit_cnt += c;
1122 spin_unlock_irqrestore(&info->slock, flags);
1123
1124 buf += c;
1125 count -= c;
1126 total += c;
1127 }
1128
1129 if (info->xmit_cnt && !tty->stopped) {
1130 if (!tty->hw_stopped ||
1131 (info->type == PORT_16550A) ||
1132 (info->board->chip_flag)) {
1133 spin_lock_irqsave(&info->slock, flags);
1134 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1135 UART_IER);
1136 info->IER |= UART_IER_THRI;
1137 outb(info->IER, info->ioaddr + UART_IER);
1138 spin_unlock_irqrestore(&info->slock, flags);
1139 }
1140 }
1141 return total;
1142 }
1143
mxser_put_char(struct tty_struct * tty,unsigned char ch)1144 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1145 {
1146 struct mxser_port *info = tty->driver_data;
1147 unsigned long flags;
1148
1149 if (!info->port.xmit_buf)
1150 return 0;
1151
1152 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1153 return 0;
1154
1155 spin_lock_irqsave(&info->slock, flags);
1156 info->port.xmit_buf[info->xmit_head++] = ch;
1157 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1158 info->xmit_cnt++;
1159 spin_unlock_irqrestore(&info->slock, flags);
1160 if (!tty->stopped) {
1161 if (!tty->hw_stopped ||
1162 (info->type == PORT_16550A) ||
1163 info->board->chip_flag) {
1164 spin_lock_irqsave(&info->slock, flags);
1165 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1166 info->IER |= UART_IER_THRI;
1167 outb(info->IER, info->ioaddr + UART_IER);
1168 spin_unlock_irqrestore(&info->slock, flags);
1169 }
1170 }
1171 return 1;
1172 }
1173
1174
mxser_flush_chars(struct tty_struct * tty)1175 static void mxser_flush_chars(struct tty_struct *tty)
1176 {
1177 struct mxser_port *info = tty->driver_data;
1178 unsigned long flags;
1179
1180 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1181 (tty->hw_stopped && info->type != PORT_16550A &&
1182 !info->board->chip_flag))
1183 return;
1184
1185 spin_lock_irqsave(&info->slock, flags);
1186
1187 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1188 info->IER |= UART_IER_THRI;
1189 outb(info->IER, info->ioaddr + UART_IER);
1190
1191 spin_unlock_irqrestore(&info->slock, flags);
1192 }
1193
mxser_write_room(struct tty_struct * tty)1194 static int mxser_write_room(struct tty_struct *tty)
1195 {
1196 struct mxser_port *info = tty->driver_data;
1197 int ret;
1198
1199 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1200 return ret < 0 ? 0 : ret;
1201 }
1202
mxser_chars_in_buffer(struct tty_struct * tty)1203 static int mxser_chars_in_buffer(struct tty_struct *tty)
1204 {
1205 struct mxser_port *info = tty->driver_data;
1206 return info->xmit_cnt;
1207 }
1208
1209 /*
1210 * ------------------------------------------------------------
1211 * friends of mxser_ioctl()
1212 * ------------------------------------------------------------
1213 */
mxser_get_serial_info(struct tty_struct * tty,struct serial_struct __user * retinfo)1214 static int mxser_get_serial_info(struct tty_struct *tty,
1215 struct serial_struct __user *retinfo)
1216 {
1217 struct mxser_port *info = tty->driver_data;
1218 struct serial_struct tmp = {
1219 .type = info->type,
1220 .line = tty->index,
1221 .port = info->ioaddr,
1222 .irq = info->board->irq,
1223 .flags = info->port.flags,
1224 .baud_base = info->baud_base,
1225 .close_delay = info->port.close_delay,
1226 .closing_wait = info->port.closing_wait,
1227 .custom_divisor = info->custom_divisor,
1228 };
1229 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1230 return -EFAULT;
1231 return 0;
1232 }
1233
mxser_set_serial_info(struct tty_struct * tty,struct serial_struct __user * new_info)1234 static int mxser_set_serial_info(struct tty_struct *tty,
1235 struct serial_struct __user *new_info)
1236 {
1237 struct mxser_port *info = tty->driver_data;
1238 struct tty_port *port = &info->port;
1239 struct serial_struct new_serial;
1240 speed_t baud;
1241 unsigned long sl_flags;
1242 unsigned int flags;
1243 int retval = 0;
1244
1245 if (!new_info || !info->ioaddr)
1246 return -ENODEV;
1247 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1248 return -EFAULT;
1249
1250 if (new_serial.irq != info->board->irq ||
1251 new_serial.port != info->ioaddr)
1252 return -EINVAL;
1253
1254 flags = port->flags & ASYNC_SPD_MASK;
1255
1256 if (!capable(CAP_SYS_ADMIN)) {
1257 if ((new_serial.baud_base != info->baud_base) ||
1258 (new_serial.close_delay != info->port.close_delay) ||
1259 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1260 return -EPERM;
1261 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1262 (new_serial.flags & ASYNC_USR_MASK));
1263 } else {
1264 /*
1265 * OK, past this point, all the error checking has been done.
1266 * At this point, we start making changes.....
1267 */
1268 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1269 (new_serial.flags & ASYNC_FLAGS));
1270 port->close_delay = new_serial.close_delay * HZ / 100;
1271 port->closing_wait = new_serial.closing_wait * HZ / 100;
1272 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1273 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1274 (new_serial.baud_base != info->baud_base ||
1275 new_serial.custom_divisor !=
1276 info->custom_divisor)) {
1277 if (new_serial.custom_divisor == 0)
1278 return -EINVAL;
1279 baud = new_serial.baud_base / new_serial.custom_divisor;
1280 tty_encode_baud_rate(tty, baud, baud);
1281 }
1282 }
1283
1284 info->type = new_serial.type;
1285
1286 process_txrx_fifo(info);
1287
1288 if (tty_port_initialized(port)) {
1289 if (flags != (port->flags & ASYNC_SPD_MASK)) {
1290 spin_lock_irqsave(&info->slock, sl_flags);
1291 mxser_change_speed(tty, NULL);
1292 spin_unlock_irqrestore(&info->slock, sl_flags);
1293 }
1294 } else {
1295 retval = mxser_activate(port, tty);
1296 if (retval == 0)
1297 tty_port_set_initialized(port, 1);
1298 }
1299 return retval;
1300 }
1301
1302 /*
1303 * mxser_get_lsr_info - get line status register info
1304 *
1305 * Purpose: Let user call ioctl() to get info when the UART physically
1306 * is emptied. On bus types like RS485, the transmitter must
1307 * release the bus after transmitting. This must be done when
1308 * the transmit shift register is empty, not be done when the
1309 * transmit holding register is empty. This functionality
1310 * allows an RS485 driver to be written in user space.
1311 */
mxser_get_lsr_info(struct mxser_port * info,unsigned int __user * value)1312 static int mxser_get_lsr_info(struct mxser_port *info,
1313 unsigned int __user *value)
1314 {
1315 unsigned char status;
1316 unsigned int result;
1317 unsigned long flags;
1318
1319 spin_lock_irqsave(&info->slock, flags);
1320 status = inb(info->ioaddr + UART_LSR);
1321 spin_unlock_irqrestore(&info->slock, flags);
1322 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1323 return put_user(result, value);
1324 }
1325
mxser_tiocmget(struct tty_struct * tty)1326 static int mxser_tiocmget(struct tty_struct *tty)
1327 {
1328 struct mxser_port *info = tty->driver_data;
1329 unsigned char control, status;
1330 unsigned long flags;
1331
1332
1333 if (tty->index == MXSER_PORTS)
1334 return -ENOIOCTLCMD;
1335 if (tty_io_error(tty))
1336 return -EIO;
1337
1338 control = info->MCR;
1339
1340 spin_lock_irqsave(&info->slock, flags);
1341 status = inb(info->ioaddr + UART_MSR);
1342 if (status & UART_MSR_ANY_DELTA)
1343 mxser_check_modem_status(tty, info, status);
1344 spin_unlock_irqrestore(&info->slock, flags);
1345 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1346 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1347 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1348 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1349 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1350 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1351 }
1352
mxser_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1353 static int mxser_tiocmset(struct tty_struct *tty,
1354 unsigned int set, unsigned int clear)
1355 {
1356 struct mxser_port *info = tty->driver_data;
1357 unsigned long flags;
1358
1359
1360 if (tty->index == MXSER_PORTS)
1361 return -ENOIOCTLCMD;
1362 if (tty_io_error(tty))
1363 return -EIO;
1364
1365 spin_lock_irqsave(&info->slock, flags);
1366
1367 if (set & TIOCM_RTS)
1368 info->MCR |= UART_MCR_RTS;
1369 if (set & TIOCM_DTR)
1370 info->MCR |= UART_MCR_DTR;
1371
1372 if (clear & TIOCM_RTS)
1373 info->MCR &= ~UART_MCR_RTS;
1374 if (clear & TIOCM_DTR)
1375 info->MCR &= ~UART_MCR_DTR;
1376
1377 outb(info->MCR, info->ioaddr + UART_MCR);
1378 spin_unlock_irqrestore(&info->slock, flags);
1379 return 0;
1380 }
1381
mxser_program_mode(int port)1382 static int __init mxser_program_mode(int port)
1383 {
1384 int id, i, j, n;
1385
1386 outb(0, port);
1387 outb(0, port);
1388 outb(0, port);
1389 (void)inb(port);
1390 (void)inb(port);
1391 outb(0, port);
1392 (void)inb(port);
1393
1394 id = inb(port + 1) & 0x1F;
1395 if ((id != C168_ASIC_ID) &&
1396 (id != C104_ASIC_ID) &&
1397 (id != C102_ASIC_ID) &&
1398 (id != CI132_ASIC_ID) &&
1399 (id != CI134_ASIC_ID) &&
1400 (id != CI104J_ASIC_ID))
1401 return -1;
1402 for (i = 0, j = 0; i < 4; i++) {
1403 n = inb(port + 2);
1404 if (n == 'M') {
1405 j = 1;
1406 } else if ((j == 1) && (n == 1)) {
1407 j = 2;
1408 break;
1409 } else
1410 j = 0;
1411 }
1412 if (j != 2)
1413 id = -2;
1414 return id;
1415 }
1416
mxser_normal_mode(int port)1417 static void __init mxser_normal_mode(int port)
1418 {
1419 int i, n;
1420
1421 outb(0xA5, port + 1);
1422 outb(0x80, port + 3);
1423 outb(12, port + 0); /* 9600 bps */
1424 outb(0, port + 1);
1425 outb(0x03, port + 3); /* 8 data bits */
1426 outb(0x13, port + 4); /* loop back mode */
1427 for (i = 0; i < 16; i++) {
1428 n = inb(port + 5);
1429 if ((n & 0x61) == 0x60)
1430 break;
1431 if ((n & 1) == 1)
1432 (void)inb(port);
1433 }
1434 outb(0x00, port + 4);
1435 }
1436
1437 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1438 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1439 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1440 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1441 #define EN_CCMD 0x000 /* Chip's command register */
1442 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1443 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1444 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1445 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1446 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1447 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1448 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1449 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
mxser_read_register(int port,unsigned short * regs)1450 static int __init mxser_read_register(int port, unsigned short *regs)
1451 {
1452 int i, k, value, id;
1453 unsigned int j;
1454
1455 id = mxser_program_mode(port);
1456 if (id < 0)
1457 return id;
1458 for (i = 0; i < 14; i++) {
1459 k = (i & 0x3F) | 0x180;
1460 for (j = 0x100; j > 0; j >>= 1) {
1461 outb(CHIP_CS, port);
1462 if (k & j) {
1463 outb(CHIP_CS | CHIP_DO, port);
1464 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1465 } else {
1466 outb(CHIP_CS, port);
1467 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1468 }
1469 }
1470 (void)inb(port);
1471 value = 0;
1472 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1473 outb(CHIP_CS, port);
1474 outb(CHIP_CS | CHIP_SK, port);
1475 if (inb(port) & CHIP_DI)
1476 value |= j;
1477 }
1478 regs[i] = value;
1479 outb(0, port);
1480 }
1481 mxser_normal_mode(port);
1482 return id;
1483 }
1484
mxser_ioctl_special(unsigned int cmd,void __user * argp)1485 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1486 {
1487 struct mxser_port *ip;
1488 struct tty_port *port;
1489 struct tty_struct *tty;
1490 int result, status;
1491 unsigned int i, j;
1492 int ret = 0;
1493
1494 switch (cmd) {
1495 case MOXA_GET_MAJOR:
1496 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1497 "%x (GET_MAJOR), fix your userspace\n",
1498 current->comm, cmd);
1499 return put_user(ttymajor, (int __user *)argp);
1500
1501 case MOXA_CHKPORTENABLE:
1502 result = 0;
1503 for (i = 0; i < MXSER_BOARDS; i++)
1504 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1505 if (mxser_boards[i].ports[j].ioaddr)
1506 result |= (1 << i);
1507 return put_user(result, (unsigned long __user *)argp);
1508 case MOXA_GETDATACOUNT:
1509 /* The receive side is locked by port->slock but it isn't
1510 clear that an exact snapshot is worth copying here */
1511 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1512 ret = -EFAULT;
1513 return ret;
1514 case MOXA_GETMSTATUS: {
1515 struct mxser_mstatus ms, __user *msu = argp;
1516 for (i = 0; i < MXSER_BOARDS; i++)
1517 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1518 ip = &mxser_boards[i].ports[j];
1519 port = &ip->port;
1520 memset(&ms, 0, sizeof(ms));
1521
1522 mutex_lock(&port->mutex);
1523 if (!ip->ioaddr)
1524 goto copy;
1525
1526 tty = tty_port_tty_get(port);
1527
1528 if (!tty)
1529 ms.cflag = ip->normal_termios.c_cflag;
1530 else
1531 ms.cflag = tty->termios.c_cflag;
1532 tty_kref_put(tty);
1533 spin_lock_irq(&ip->slock);
1534 status = inb(ip->ioaddr + UART_MSR);
1535 spin_unlock_irq(&ip->slock);
1536 if (status & UART_MSR_DCD)
1537 ms.dcd = 1;
1538 if (status & UART_MSR_DSR)
1539 ms.dsr = 1;
1540 if (status & UART_MSR_CTS)
1541 ms.cts = 1;
1542 copy:
1543 mutex_unlock(&port->mutex);
1544 if (copy_to_user(msu, &ms, sizeof(ms)))
1545 return -EFAULT;
1546 msu++;
1547 }
1548 return 0;
1549 }
1550 case MOXA_ASPP_MON_EXT: {
1551 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1552 unsigned int cflag, iflag, p;
1553 u8 opmode;
1554
1555 me = kzalloc(sizeof(*me), GFP_KERNEL);
1556 if (!me)
1557 return -ENOMEM;
1558
1559 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1560 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1561 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1562 i = MXSER_BOARDS;
1563 break;
1564 }
1565 ip = &mxser_boards[i].ports[j];
1566 port = &ip->port;
1567
1568 mutex_lock(&port->mutex);
1569 if (!ip->ioaddr) {
1570 mutex_unlock(&port->mutex);
1571 continue;
1572 }
1573
1574 spin_lock_irq(&ip->slock);
1575 status = mxser_get_msr(ip->ioaddr, 0, p);
1576
1577 if (status & UART_MSR_TERI)
1578 ip->icount.rng++;
1579 if (status & UART_MSR_DDSR)
1580 ip->icount.dsr++;
1581 if (status & UART_MSR_DDCD)
1582 ip->icount.dcd++;
1583 if (status & UART_MSR_DCTS)
1584 ip->icount.cts++;
1585
1586 ip->mon_data.modem_status = status;
1587 me->rx_cnt[p] = ip->mon_data.rxcnt;
1588 me->tx_cnt[p] = ip->mon_data.txcnt;
1589 me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1590 me->up_txcnt[p] = ip->mon_data.up_txcnt;
1591 me->modem_status[p] =
1592 ip->mon_data.modem_status;
1593 spin_unlock_irq(&ip->slock);
1594
1595 tty = tty_port_tty_get(&ip->port);
1596
1597 if (!tty) {
1598 cflag = ip->normal_termios.c_cflag;
1599 iflag = ip->normal_termios.c_iflag;
1600 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1601 } else {
1602 cflag = tty->termios.c_cflag;
1603 iflag = tty->termios.c_iflag;
1604 me->baudrate[p] = tty_get_baud_rate(tty);
1605 }
1606 tty_kref_put(tty);
1607
1608 me->databits[p] = cflag & CSIZE;
1609 me->stopbits[p] = cflag & CSTOPB;
1610 me->parity[p] = cflag & (PARENB | PARODD |
1611 CMSPAR);
1612
1613 if (cflag & CRTSCTS)
1614 me->flowctrl[p] |= 0x03;
1615
1616 if (iflag & (IXON | IXOFF))
1617 me->flowctrl[p] |= 0x0C;
1618
1619 if (ip->type == PORT_16550A)
1620 me->fifo[p] = 1;
1621
1622 if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
1623 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1624 opmode &= OP_MODE_MASK;
1625 } else {
1626 opmode = RS232_MODE;
1627 }
1628 me->iftype[p] = opmode;
1629 mutex_unlock(&port->mutex);
1630 }
1631 }
1632 if (copy_to_user(argp, me, sizeof(*me)))
1633 ret = -EFAULT;
1634 kfree(me);
1635 return ret;
1636 }
1637 default:
1638 return -ENOIOCTLCMD;
1639 }
1640 return 0;
1641 }
1642
mxser_cflags_changed(struct mxser_port * info,unsigned long arg,struct async_icount * cprev)1643 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1644 struct async_icount *cprev)
1645 {
1646 struct async_icount cnow;
1647 unsigned long flags;
1648 int ret;
1649
1650 spin_lock_irqsave(&info->slock, flags);
1651 cnow = info->icount; /* atomic copy */
1652 spin_unlock_irqrestore(&info->slock, flags);
1653
1654 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1655 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1656 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1657 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1658
1659 *cprev = cnow;
1660
1661 return ret;
1662 }
1663
mxser_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)1664 static int mxser_ioctl(struct tty_struct *tty,
1665 unsigned int cmd, unsigned long arg)
1666 {
1667 struct mxser_port *info = tty->driver_data;
1668 struct tty_port *port = &info->port;
1669 struct async_icount cnow;
1670 unsigned long flags;
1671 void __user *argp = (void __user *)arg;
1672 int retval;
1673
1674 if (tty->index == MXSER_PORTS)
1675 return mxser_ioctl_special(cmd, argp);
1676
1677 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1678 int p;
1679 unsigned long opmode;
1680 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1681 int shiftbit;
1682 unsigned char val, mask;
1683
1684 if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
1685 return -EFAULT;
1686
1687 p = tty->index % 4;
1688 if (cmd == MOXA_SET_OP_MODE) {
1689 if (get_user(opmode, (int __user *) argp))
1690 return -EFAULT;
1691 if (opmode != RS232_MODE &&
1692 opmode != RS485_2WIRE_MODE &&
1693 opmode != RS422_MODE &&
1694 opmode != RS485_4WIRE_MODE)
1695 return -EFAULT;
1696 mask = ModeMask[p];
1697 shiftbit = p * 2;
1698 spin_lock_irq(&info->slock);
1699 val = inb(info->opmode_ioaddr);
1700 val &= mask;
1701 val |= (opmode << shiftbit);
1702 outb(val, info->opmode_ioaddr);
1703 spin_unlock_irq(&info->slock);
1704 } else {
1705 shiftbit = p * 2;
1706 spin_lock_irq(&info->slock);
1707 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1708 spin_unlock_irq(&info->slock);
1709 opmode &= OP_MODE_MASK;
1710 if (put_user(opmode, (int __user *)argp))
1711 return -EFAULT;
1712 }
1713 return 0;
1714 }
1715
1716 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && tty_io_error(tty))
1717 return -EIO;
1718
1719 switch (cmd) {
1720 case TIOCGSERIAL:
1721 mutex_lock(&port->mutex);
1722 retval = mxser_get_serial_info(tty, argp);
1723 mutex_unlock(&port->mutex);
1724 return retval;
1725 case TIOCSSERIAL:
1726 mutex_lock(&port->mutex);
1727 retval = mxser_set_serial_info(tty, argp);
1728 mutex_unlock(&port->mutex);
1729 return retval;
1730 case TIOCSERGETLSR: /* Get line status register */
1731 return mxser_get_lsr_info(info, argp);
1732 /*
1733 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1734 * - mask passed in arg for lines of interest
1735 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1736 * Caller should use TIOCGICOUNT to see which one it was
1737 */
1738 case TIOCMIWAIT:
1739 spin_lock_irqsave(&info->slock, flags);
1740 cnow = info->icount; /* note the counters on entry */
1741 spin_unlock_irqrestore(&info->slock, flags);
1742
1743 return wait_event_interruptible(info->port.delta_msr_wait,
1744 mxser_cflags_changed(info, arg, &cnow));
1745 case MOXA_HighSpeedOn:
1746 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1747 case MOXA_SDS_RSTICOUNTER:
1748 spin_lock_irq(&info->slock);
1749 info->mon_data.rxcnt = 0;
1750 info->mon_data.txcnt = 0;
1751 spin_unlock_irq(&info->slock);
1752 return 0;
1753
1754 case MOXA_ASPP_OQUEUE:{
1755 int len, lsr;
1756
1757 len = mxser_chars_in_buffer(tty);
1758 spin_lock_irq(&info->slock);
1759 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1760 spin_unlock_irq(&info->slock);
1761 len += (lsr ? 0 : 1);
1762
1763 return put_user(len, (int __user *)argp);
1764 }
1765 case MOXA_ASPP_MON: {
1766 int mcr, status;
1767
1768 spin_lock_irq(&info->slock);
1769 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1770 mxser_check_modem_status(tty, info, status);
1771
1772 mcr = inb(info->ioaddr + UART_MCR);
1773 spin_unlock_irq(&info->slock);
1774
1775 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1776 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1777 else
1778 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1779
1780 if (mcr & MOXA_MUST_MCR_TX_XON)
1781 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1782 else
1783 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1784
1785 if (tty->hw_stopped)
1786 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1787 else
1788 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1789
1790 if (copy_to_user(argp, &info->mon_data,
1791 sizeof(struct mxser_mon)))
1792 return -EFAULT;
1793
1794 return 0;
1795 }
1796 case MOXA_ASPP_LSTATUS: {
1797 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1798 return -EFAULT;
1799
1800 info->err_shadow = 0;
1801 return 0;
1802 }
1803 case MOXA_SET_BAUD_METHOD: {
1804 int method;
1805
1806 if (get_user(method, (int __user *)argp))
1807 return -EFAULT;
1808 mxser_set_baud_method[tty->index] = method;
1809 return put_user(method, (int __user *)argp);
1810 }
1811 default:
1812 return -ENOIOCTLCMD;
1813 }
1814 return 0;
1815 }
1816
1817 /*
1818 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1819 * Return: write counters to the user passed counter struct
1820 * NB: both 1->0 and 0->1 transitions are counted except for
1821 * RI where only 0->1 is counted.
1822 */
1823
mxser_get_icount(struct tty_struct * tty,struct serial_icounter_struct * icount)1824 static int mxser_get_icount(struct tty_struct *tty,
1825 struct serial_icounter_struct *icount)
1826
1827 {
1828 struct mxser_port *info = tty->driver_data;
1829 struct async_icount cnow;
1830 unsigned long flags;
1831
1832 spin_lock_irqsave(&info->slock, flags);
1833 cnow = info->icount;
1834 spin_unlock_irqrestore(&info->slock, flags);
1835
1836 icount->frame = cnow.frame;
1837 icount->brk = cnow.brk;
1838 icount->overrun = cnow.overrun;
1839 icount->buf_overrun = cnow.buf_overrun;
1840 icount->parity = cnow.parity;
1841 icount->rx = cnow.rx;
1842 icount->tx = cnow.tx;
1843 icount->cts = cnow.cts;
1844 icount->dsr = cnow.dsr;
1845 icount->rng = cnow.rng;
1846 icount->dcd = cnow.dcd;
1847 return 0;
1848 }
1849
mxser_stoprx(struct tty_struct * tty)1850 static void mxser_stoprx(struct tty_struct *tty)
1851 {
1852 struct mxser_port *info = tty->driver_data;
1853
1854 info->ldisc_stop_rx = 1;
1855 if (I_IXOFF(tty)) {
1856 if (info->board->chip_flag) {
1857 info->IER &= ~MOXA_MUST_RECV_ISR;
1858 outb(info->IER, info->ioaddr + UART_IER);
1859 } else {
1860 info->x_char = STOP_CHAR(tty);
1861 outb(0, info->ioaddr + UART_IER);
1862 info->IER |= UART_IER_THRI;
1863 outb(info->IER, info->ioaddr + UART_IER);
1864 }
1865 }
1866
1867 if (C_CRTSCTS(tty)) {
1868 info->MCR &= ~UART_MCR_RTS;
1869 outb(info->MCR, info->ioaddr + UART_MCR);
1870 }
1871 }
1872
1873 /*
1874 * This routine is called by the upper-layer tty layer to signal that
1875 * incoming characters should be throttled.
1876 */
mxser_throttle(struct tty_struct * tty)1877 static void mxser_throttle(struct tty_struct *tty)
1878 {
1879 mxser_stoprx(tty);
1880 }
1881
mxser_unthrottle(struct tty_struct * tty)1882 static void mxser_unthrottle(struct tty_struct *tty)
1883 {
1884 struct mxser_port *info = tty->driver_data;
1885
1886 /* startrx */
1887 info->ldisc_stop_rx = 0;
1888 if (I_IXOFF(tty)) {
1889 if (info->x_char)
1890 info->x_char = 0;
1891 else {
1892 if (info->board->chip_flag) {
1893 info->IER |= MOXA_MUST_RECV_ISR;
1894 outb(info->IER, info->ioaddr + UART_IER);
1895 } else {
1896 info->x_char = START_CHAR(tty);
1897 outb(0, info->ioaddr + UART_IER);
1898 info->IER |= UART_IER_THRI;
1899 outb(info->IER, info->ioaddr + UART_IER);
1900 }
1901 }
1902 }
1903
1904 if (C_CRTSCTS(tty)) {
1905 info->MCR |= UART_MCR_RTS;
1906 outb(info->MCR, info->ioaddr + UART_MCR);
1907 }
1908 }
1909
1910 /*
1911 * mxser_stop() and mxser_start()
1912 *
1913 * This routines are called before setting or resetting tty->stopped.
1914 * They enable or disable transmitter interrupts, as necessary.
1915 */
mxser_stop(struct tty_struct * tty)1916 static void mxser_stop(struct tty_struct *tty)
1917 {
1918 struct mxser_port *info = tty->driver_data;
1919 unsigned long flags;
1920
1921 spin_lock_irqsave(&info->slock, flags);
1922 if (info->IER & UART_IER_THRI) {
1923 info->IER &= ~UART_IER_THRI;
1924 outb(info->IER, info->ioaddr + UART_IER);
1925 }
1926 spin_unlock_irqrestore(&info->slock, flags);
1927 }
1928
mxser_start(struct tty_struct * tty)1929 static void mxser_start(struct tty_struct *tty)
1930 {
1931 struct mxser_port *info = tty->driver_data;
1932 unsigned long flags;
1933
1934 spin_lock_irqsave(&info->slock, flags);
1935 if (info->xmit_cnt && info->port.xmit_buf) {
1936 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1937 info->IER |= UART_IER_THRI;
1938 outb(info->IER, info->ioaddr + UART_IER);
1939 }
1940 spin_unlock_irqrestore(&info->slock, flags);
1941 }
1942
mxser_set_termios(struct tty_struct * tty,struct ktermios * old_termios)1943 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1944 {
1945 struct mxser_port *info = tty->driver_data;
1946 unsigned long flags;
1947
1948 spin_lock_irqsave(&info->slock, flags);
1949 mxser_change_speed(tty, old_termios);
1950 spin_unlock_irqrestore(&info->slock, flags);
1951
1952 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1953 tty->hw_stopped = 0;
1954 mxser_start(tty);
1955 }
1956
1957 /* Handle sw stopped */
1958 if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) {
1959 tty->stopped = 0;
1960
1961 if (info->board->chip_flag) {
1962 spin_lock_irqsave(&info->slock, flags);
1963 mxser_disable_must_rx_software_flow_control(
1964 info->ioaddr);
1965 spin_unlock_irqrestore(&info->slock, flags);
1966 }
1967
1968 mxser_start(tty);
1969 }
1970 }
1971
1972 /*
1973 * mxser_wait_until_sent() --- wait until the transmitter is empty
1974 */
mxser_wait_until_sent(struct tty_struct * tty,int timeout)1975 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1976 {
1977 struct mxser_port *info = tty->driver_data;
1978 unsigned long orig_jiffies, char_time;
1979 unsigned long flags;
1980 int lsr;
1981
1982 if (info->type == PORT_UNKNOWN)
1983 return;
1984
1985 if (info->xmit_fifo_size == 0)
1986 return; /* Just in case.... */
1987
1988 orig_jiffies = jiffies;
1989 /*
1990 * Set the check interval to be 1/5 of the estimated time to
1991 * send a single character, and make it at least 1. The check
1992 * interval should also be less than the timeout.
1993 *
1994 * Note: we have to use pretty tight timings here to satisfy
1995 * the NIST-PCTS.
1996 */
1997 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1998 char_time = char_time / 5;
1999 if (char_time == 0)
2000 char_time = 1;
2001 if (timeout && timeout < char_time)
2002 char_time = timeout;
2003 /*
2004 * If the transmitter hasn't cleared in twice the approximate
2005 * amount of time to send the entire FIFO, it probably won't
2006 * ever clear. This assumes the UART isn't doing flow
2007 * control, which is currently the case. Hence, if it ever
2008 * takes longer than info->timeout, this is probably due to a
2009 * UART bug of some kind. So, we clamp the timeout parameter at
2010 * 2*info->timeout.
2011 */
2012 if (!timeout || timeout > 2 * info->timeout)
2013 timeout = 2 * info->timeout;
2014
2015 spin_lock_irqsave(&info->slock, flags);
2016 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2017 spin_unlock_irqrestore(&info->slock, flags);
2018 schedule_timeout_interruptible(char_time);
2019 spin_lock_irqsave(&info->slock, flags);
2020 if (signal_pending(current))
2021 break;
2022 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2023 break;
2024 }
2025 spin_unlock_irqrestore(&info->slock, flags);
2026 set_current_state(TASK_RUNNING);
2027 }
2028
2029 /*
2030 * This routine is called by tty_hangup() when a hangup is signaled.
2031 */
mxser_hangup(struct tty_struct * tty)2032 static void mxser_hangup(struct tty_struct *tty)
2033 {
2034 struct mxser_port *info = tty->driver_data;
2035
2036 mxser_flush_buffer(tty);
2037 tty_port_hangup(&info->port);
2038 }
2039
2040 /*
2041 * mxser_rs_break() --- routine which turns the break handling on or off
2042 */
mxser_rs_break(struct tty_struct * tty,int break_state)2043 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2044 {
2045 struct mxser_port *info = tty->driver_data;
2046 unsigned long flags;
2047
2048 spin_lock_irqsave(&info->slock, flags);
2049 if (break_state == -1)
2050 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2051 info->ioaddr + UART_LCR);
2052 else
2053 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2054 info->ioaddr + UART_LCR);
2055 spin_unlock_irqrestore(&info->slock, flags);
2056 return 0;
2057 }
2058
mxser_receive_chars(struct tty_struct * tty,struct mxser_port * port,int * status)2059 static void mxser_receive_chars(struct tty_struct *tty,
2060 struct mxser_port *port, int *status)
2061 {
2062 unsigned char ch, gdl;
2063 int ignored = 0;
2064 int cnt = 0;
2065 int recv_room;
2066 int max = 256;
2067
2068 recv_room = tty->receive_room;
2069 if (recv_room == 0 && !port->ldisc_stop_rx)
2070 mxser_stoprx(tty);
2071 if (port->board->chip_flag != MOXA_OTHER_UART) {
2072
2073 if (*status & UART_LSR_SPECIAL)
2074 goto intr_old;
2075 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2076 (*status & MOXA_MUST_LSR_RERR))
2077 goto intr_old;
2078 if (*status & MOXA_MUST_LSR_RERR)
2079 goto intr_old;
2080
2081 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2082
2083 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2084 gdl &= MOXA_MUST_GDL_MASK;
2085 if (gdl >= recv_room) {
2086 if (!port->ldisc_stop_rx)
2087 mxser_stoprx(tty);
2088 }
2089 while (gdl--) {
2090 ch = inb(port->ioaddr + UART_RX);
2091 tty_insert_flip_char(&port->port, ch, 0);
2092 cnt++;
2093 }
2094 goto end_intr;
2095 }
2096 intr_old:
2097
2098 do {
2099 if (max-- < 0)
2100 break;
2101
2102 ch = inb(port->ioaddr + UART_RX);
2103 if (port->board->chip_flag && (*status & UART_LSR_OE))
2104 outb(0x23, port->ioaddr + UART_FCR);
2105 *status &= port->read_status_mask;
2106 if (*status & port->ignore_status_mask) {
2107 if (++ignored > 100)
2108 break;
2109 } else {
2110 char flag = 0;
2111 if (*status & UART_LSR_SPECIAL) {
2112 if (*status & UART_LSR_BI) {
2113 flag = TTY_BREAK;
2114 port->icount.brk++;
2115
2116 if (port->port.flags & ASYNC_SAK)
2117 do_SAK(tty);
2118 } else if (*status & UART_LSR_PE) {
2119 flag = TTY_PARITY;
2120 port->icount.parity++;
2121 } else if (*status & UART_LSR_FE) {
2122 flag = TTY_FRAME;
2123 port->icount.frame++;
2124 } else if (*status & UART_LSR_OE) {
2125 flag = TTY_OVERRUN;
2126 port->icount.overrun++;
2127 } else
2128 flag = TTY_BREAK;
2129 }
2130 tty_insert_flip_char(&port->port, ch, flag);
2131 cnt++;
2132 if (cnt >= recv_room) {
2133 if (!port->ldisc_stop_rx)
2134 mxser_stoprx(tty);
2135 break;
2136 }
2137
2138 }
2139
2140 if (port->board->chip_flag)
2141 break;
2142
2143 *status = inb(port->ioaddr + UART_LSR);
2144 } while (*status & UART_LSR_DR);
2145
2146 end_intr:
2147 mxvar_log.rxcnt[tty->index] += cnt;
2148 port->mon_data.rxcnt += cnt;
2149 port->mon_data.up_rxcnt += cnt;
2150
2151 /*
2152 * We are called from an interrupt context with &port->slock
2153 * being held. Drop it temporarily in order to prevent
2154 * recursive locking.
2155 */
2156 spin_unlock(&port->slock);
2157 tty_flip_buffer_push(&port->port);
2158 spin_lock(&port->slock);
2159 }
2160
mxser_transmit_chars(struct tty_struct * tty,struct mxser_port * port)2161 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2162 {
2163 int count, cnt;
2164
2165 if (port->x_char) {
2166 outb(port->x_char, port->ioaddr + UART_TX);
2167 port->x_char = 0;
2168 mxvar_log.txcnt[tty->index]++;
2169 port->mon_data.txcnt++;
2170 port->mon_data.up_txcnt++;
2171 port->icount.tx++;
2172 return;
2173 }
2174
2175 if (port->port.xmit_buf == NULL)
2176 return;
2177
2178 if (port->xmit_cnt <= 0 || tty->stopped ||
2179 (tty->hw_stopped &&
2180 (port->type != PORT_16550A) &&
2181 (!port->board->chip_flag))) {
2182 port->IER &= ~UART_IER_THRI;
2183 outb(port->IER, port->ioaddr + UART_IER);
2184 return;
2185 }
2186
2187 cnt = port->xmit_cnt;
2188 count = port->xmit_fifo_size;
2189 do {
2190 outb(port->port.xmit_buf[port->xmit_tail++],
2191 port->ioaddr + UART_TX);
2192 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2193 if (--port->xmit_cnt <= 0)
2194 break;
2195 } while (--count > 0);
2196 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2197
2198 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2199 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2200 port->icount.tx += (cnt - port->xmit_cnt);
2201
2202 if (port->xmit_cnt < WAKEUP_CHARS)
2203 tty_wakeup(tty);
2204
2205 if (port->xmit_cnt <= 0) {
2206 port->IER &= ~UART_IER_THRI;
2207 outb(port->IER, port->ioaddr + UART_IER);
2208 }
2209 }
2210
2211 /*
2212 * This is the serial driver's generic interrupt routine
2213 */
mxser_interrupt(int irq,void * dev_id)2214 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2215 {
2216 int status, iir, i;
2217 struct mxser_board *brd = NULL;
2218 struct mxser_port *port;
2219 int max, irqbits, bits, msr;
2220 unsigned int int_cnt, pass_counter = 0;
2221 int handled = IRQ_NONE;
2222 struct tty_struct *tty;
2223
2224 for (i = 0; i < MXSER_BOARDS; i++)
2225 if (dev_id == &mxser_boards[i]) {
2226 brd = dev_id;
2227 break;
2228 }
2229
2230 if (i == MXSER_BOARDS)
2231 goto irq_stop;
2232 if (brd == NULL)
2233 goto irq_stop;
2234 max = brd->info->nports;
2235 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2236 irqbits = inb(brd->vector) & brd->vector_mask;
2237 if (irqbits == brd->vector_mask)
2238 break;
2239
2240 handled = IRQ_HANDLED;
2241 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2242 if (irqbits == brd->vector_mask)
2243 break;
2244 if (bits & irqbits)
2245 continue;
2246 port = &brd->ports[i];
2247
2248 int_cnt = 0;
2249 spin_lock(&port->slock);
2250 do {
2251 iir = inb(port->ioaddr + UART_IIR);
2252 if (iir & UART_IIR_NO_INT)
2253 break;
2254 iir &= MOXA_MUST_IIR_MASK;
2255 tty = tty_port_tty_get(&port->port);
2256 if (!tty || port->closing ||
2257 !tty_port_initialized(&port->port)) {
2258 status = inb(port->ioaddr + UART_LSR);
2259 outb(0x27, port->ioaddr + UART_FCR);
2260 inb(port->ioaddr + UART_MSR);
2261 tty_kref_put(tty);
2262 break;
2263 }
2264
2265 status = inb(port->ioaddr + UART_LSR);
2266
2267 if (status & UART_LSR_PE)
2268 port->err_shadow |= NPPI_NOTIFY_PARITY;
2269 if (status & UART_LSR_FE)
2270 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2271 if (status & UART_LSR_OE)
2272 port->err_shadow |=
2273 NPPI_NOTIFY_HW_OVERRUN;
2274 if (status & UART_LSR_BI)
2275 port->err_shadow |= NPPI_NOTIFY_BREAK;
2276
2277 if (port->board->chip_flag) {
2278 if (iir == MOXA_MUST_IIR_GDA ||
2279 iir == MOXA_MUST_IIR_RDA ||
2280 iir == MOXA_MUST_IIR_RTO ||
2281 iir == MOXA_MUST_IIR_LSR)
2282 mxser_receive_chars(tty, port,
2283 &status);
2284
2285 } else {
2286 status &= port->read_status_mask;
2287 if (status & UART_LSR_DR)
2288 mxser_receive_chars(tty, port,
2289 &status);
2290 }
2291 msr = inb(port->ioaddr + UART_MSR);
2292 if (msr & UART_MSR_ANY_DELTA)
2293 mxser_check_modem_status(tty, port, msr);
2294
2295 if (port->board->chip_flag) {
2296 if (iir == 0x02 && (status &
2297 UART_LSR_THRE))
2298 mxser_transmit_chars(tty, port);
2299 } else {
2300 if (status & UART_LSR_THRE)
2301 mxser_transmit_chars(tty, port);
2302 }
2303 tty_kref_put(tty);
2304 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2305 spin_unlock(&port->slock);
2306 }
2307 }
2308
2309 irq_stop:
2310 return handled;
2311 }
2312
2313 static const struct tty_operations mxser_ops = {
2314 .open = mxser_open,
2315 .close = mxser_close,
2316 .write = mxser_write,
2317 .put_char = mxser_put_char,
2318 .flush_chars = mxser_flush_chars,
2319 .write_room = mxser_write_room,
2320 .chars_in_buffer = mxser_chars_in_buffer,
2321 .flush_buffer = mxser_flush_buffer,
2322 .ioctl = mxser_ioctl,
2323 .throttle = mxser_throttle,
2324 .unthrottle = mxser_unthrottle,
2325 .set_termios = mxser_set_termios,
2326 .stop = mxser_stop,
2327 .start = mxser_start,
2328 .hangup = mxser_hangup,
2329 .break_ctl = mxser_rs_break,
2330 .wait_until_sent = mxser_wait_until_sent,
2331 .tiocmget = mxser_tiocmget,
2332 .tiocmset = mxser_tiocmset,
2333 .get_icount = mxser_get_icount,
2334 };
2335
2336 static const struct tty_port_operations mxser_port_ops = {
2337 .carrier_raised = mxser_carrier_raised,
2338 .dtr_rts = mxser_dtr_rts,
2339 .activate = mxser_activate,
2340 .shutdown = mxser_shutdown_port,
2341 };
2342
2343 /*
2344 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2345 */
2346
2347 static bool allow_overlapping_vector;
2348 module_param(allow_overlapping_vector, bool, S_IRUGO);
2349 MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
2350
mxser_overlapping_vector(struct mxser_board * brd)2351 static bool mxser_overlapping_vector(struct mxser_board *brd)
2352 {
2353 return allow_overlapping_vector &&
2354 brd->vector >= brd->ports[0].ioaddr &&
2355 brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
2356 }
2357
mxser_request_vector(struct mxser_board * brd)2358 static int mxser_request_vector(struct mxser_board *brd)
2359 {
2360 if (mxser_overlapping_vector(brd))
2361 return 0;
2362 return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
2363 }
2364
mxser_release_vector(struct mxser_board * brd)2365 static void mxser_release_vector(struct mxser_board *brd)
2366 {
2367 if (mxser_overlapping_vector(brd))
2368 return;
2369 release_region(brd->vector, 1);
2370 }
2371
mxser_release_ISA_res(struct mxser_board * brd)2372 static void mxser_release_ISA_res(struct mxser_board *brd)
2373 {
2374 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2375 mxser_release_vector(brd);
2376 }
2377
mxser_initbrd(struct mxser_board * brd,struct pci_dev * pdev)2378 static int mxser_initbrd(struct mxser_board *brd,
2379 struct pci_dev *pdev)
2380 {
2381 struct mxser_port *info;
2382 unsigned int i;
2383 int retval;
2384
2385 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2386 brd->ports[0].max_baud);
2387
2388 for (i = 0; i < brd->info->nports; i++) {
2389 info = &brd->ports[i];
2390 tty_port_init(&info->port);
2391 info->port.ops = &mxser_port_ops;
2392 info->board = brd;
2393 info->stop_rx = 0;
2394 info->ldisc_stop_rx = 0;
2395
2396 /* Enhance mode enabled here */
2397 if (brd->chip_flag != MOXA_OTHER_UART)
2398 mxser_enable_must_enchance_mode(info->ioaddr);
2399
2400 info->type = brd->uart_type;
2401
2402 process_txrx_fifo(info);
2403
2404 info->custom_divisor = info->baud_base * 16;
2405 info->port.close_delay = 5 * HZ / 10;
2406 info->port.closing_wait = 30 * HZ;
2407 info->normal_termios = mxvar_sdriver->init_termios;
2408 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2409 info->err_shadow = 0;
2410 spin_lock_init(&info->slock);
2411
2412 /* before set INT ISR, disable all int */
2413 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2414 info->ioaddr + UART_IER);
2415 }
2416
2417 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2418 brd);
2419 if (retval) {
2420 for (i = 0; i < brd->info->nports; i++)
2421 tty_port_destroy(&brd->ports[i].port);
2422 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2423 "conflict with another device.\n",
2424 brd->info->name, brd->irq);
2425 }
2426
2427 return retval;
2428 }
2429
mxser_board_remove(struct mxser_board * brd)2430 static void mxser_board_remove(struct mxser_board *brd)
2431 {
2432 unsigned int i;
2433
2434 for (i = 0; i < brd->info->nports; i++) {
2435 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2436 tty_port_destroy(&brd->ports[i].port);
2437 }
2438 free_irq(brd->irq, brd);
2439 }
2440
mxser_get_ISA_conf(int cap,struct mxser_board * brd)2441 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2442 {
2443 int id, i, bits, ret;
2444 unsigned short regs[16], irq;
2445 unsigned char scratch, scratch2;
2446
2447 brd->chip_flag = MOXA_OTHER_UART;
2448
2449 id = mxser_read_register(cap, regs);
2450 switch (id) {
2451 case C168_ASIC_ID:
2452 brd->info = &mxser_cards[0];
2453 break;
2454 case C104_ASIC_ID:
2455 brd->info = &mxser_cards[1];
2456 break;
2457 case CI104J_ASIC_ID:
2458 brd->info = &mxser_cards[2];
2459 break;
2460 case C102_ASIC_ID:
2461 brd->info = &mxser_cards[5];
2462 break;
2463 case CI132_ASIC_ID:
2464 brd->info = &mxser_cards[6];
2465 break;
2466 case CI134_ASIC_ID:
2467 brd->info = &mxser_cards[7];
2468 break;
2469 default:
2470 return 0;
2471 }
2472
2473 irq = 0;
2474 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2475 Flag-hack checks if configuration should be read as 2-port here. */
2476 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2477 irq = regs[9] & 0xF000;
2478 irq = irq | (irq >> 4);
2479 if (irq != (regs[9] & 0xFF00))
2480 goto err_irqconflict;
2481 } else if (brd->info->nports == 4) {
2482 irq = regs[9] & 0xF000;
2483 irq = irq | (irq >> 4);
2484 irq = irq | (irq >> 8);
2485 if (irq != regs[9])
2486 goto err_irqconflict;
2487 } else if (brd->info->nports == 8) {
2488 irq = regs[9] & 0xF000;
2489 irq = irq | (irq >> 4);
2490 irq = irq | (irq >> 8);
2491 if ((irq != regs[9]) || (irq != regs[10]))
2492 goto err_irqconflict;
2493 }
2494
2495 if (!irq) {
2496 printk(KERN_ERR "mxser: interrupt number unset\n");
2497 return -EIO;
2498 }
2499 brd->irq = ((int)(irq & 0xF000) >> 12);
2500 for (i = 0; i < 8; i++)
2501 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2502 if ((regs[12] & 0x80) == 0) {
2503 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2504 return -EIO;
2505 }
2506 brd->vector = (int)regs[11]; /* interrupt vector */
2507 if (id == 1)
2508 brd->vector_mask = 0x00FF;
2509 else
2510 brd->vector_mask = 0x000F;
2511 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2512 if (regs[12] & bits) {
2513 brd->ports[i].baud_base = 921600;
2514 brd->ports[i].max_baud = 921600;
2515 } else {
2516 brd->ports[i].baud_base = 115200;
2517 brd->ports[i].max_baud = 115200;
2518 }
2519 }
2520 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2521 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2522 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2523 outb(scratch2, cap + UART_LCR);
2524 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2525 scratch = inb(cap + UART_IIR);
2526
2527 if (scratch & 0xC0)
2528 brd->uart_type = PORT_16550A;
2529 else
2530 brd->uart_type = PORT_16450;
2531 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2532 "mxser(IO)")) {
2533 printk(KERN_ERR "mxser: can't request ports I/O region: "
2534 "0x%.8lx-0x%.8lx\n",
2535 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2536 8 * brd->info->nports - 1);
2537 return -EIO;
2538 }
2539
2540 ret = mxser_request_vector(brd);
2541 if (ret) {
2542 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2543 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2544 "0x%.8lx-0x%.8lx\n",
2545 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2546 8 * brd->info->nports - 1);
2547 return ret;
2548 }
2549 return brd->info->nports;
2550
2551 err_irqconflict:
2552 printk(KERN_ERR "mxser: invalid interrupt number\n");
2553 return -EIO;
2554 }
2555
mxser_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2556 static int mxser_probe(struct pci_dev *pdev,
2557 const struct pci_device_id *ent)
2558 {
2559 #ifdef CONFIG_PCI
2560 struct mxser_board *brd;
2561 unsigned int i, j;
2562 unsigned long ioaddress;
2563 struct device *tty_dev;
2564 int retval = -EINVAL;
2565
2566 for (i = 0; i < MXSER_BOARDS; i++)
2567 if (mxser_boards[i].info == NULL)
2568 break;
2569
2570 if (i >= MXSER_BOARDS) {
2571 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2572 "not configured\n", MXSER_BOARDS);
2573 goto err;
2574 }
2575
2576 brd = &mxser_boards[i];
2577 brd->idx = i * MXSER_PORTS_PER_BOARD;
2578 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2579 mxser_cards[ent->driver_data].name,
2580 pdev->bus->number, PCI_SLOT(pdev->devfn));
2581
2582 retval = pci_enable_device(pdev);
2583 if (retval) {
2584 dev_err(&pdev->dev, "PCI enable failed\n");
2585 goto err;
2586 }
2587
2588 /* io address */
2589 ioaddress = pci_resource_start(pdev, 2);
2590 retval = pci_request_region(pdev, 2, "mxser(IO)");
2591 if (retval)
2592 goto err_dis;
2593
2594 brd->info = &mxser_cards[ent->driver_data];
2595 for (i = 0; i < brd->info->nports; i++)
2596 brd->ports[i].ioaddr = ioaddress + 8 * i;
2597
2598 /* vector */
2599 ioaddress = pci_resource_start(pdev, 3);
2600 retval = pci_request_region(pdev, 3, "mxser(vector)");
2601 if (retval)
2602 goto err_zero;
2603 brd->vector = ioaddress;
2604
2605 /* irq */
2606 brd->irq = pdev->irq;
2607
2608 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2609 brd->uart_type = PORT_16550A;
2610 brd->vector_mask = 0;
2611
2612 for (i = 0; i < brd->info->nports; i++) {
2613 for (j = 0; j < UART_INFO_NUM; j++) {
2614 if (Gpci_uart_info[j].type == brd->chip_flag) {
2615 brd->ports[i].max_baud =
2616 Gpci_uart_info[j].max_baud;
2617
2618 /* exception....CP-102 */
2619 if (brd->info->flags & MXSER_HIGHBAUD)
2620 brd->ports[i].max_baud = 921600;
2621 break;
2622 }
2623 }
2624 }
2625
2626 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2627 for (i = 0; i < brd->info->nports; i++) {
2628 if (i < 4)
2629 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2630 else
2631 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2632 }
2633 outb(0, ioaddress + 4); /* default set to RS232 mode */
2634 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2635 }
2636
2637 for (i = 0; i < brd->info->nports; i++) {
2638 brd->vector_mask |= (1 << i);
2639 brd->ports[i].baud_base = 921600;
2640 }
2641
2642 /* mxser_initbrd will hook ISR. */
2643 retval = mxser_initbrd(brd, pdev);
2644 if (retval)
2645 goto err_rel3;
2646
2647 for (i = 0; i < brd->info->nports; i++) {
2648 tty_dev = tty_port_register_device(&brd->ports[i].port,
2649 mxvar_sdriver, brd->idx + i, &pdev->dev);
2650 if (IS_ERR(tty_dev)) {
2651 retval = PTR_ERR(tty_dev);
2652 for (; i > 0; i--)
2653 tty_unregister_device(mxvar_sdriver,
2654 brd->idx + i - 1);
2655 goto err_relbrd;
2656 }
2657 }
2658
2659 pci_set_drvdata(pdev, brd);
2660
2661 return 0;
2662 err_relbrd:
2663 for (i = 0; i < brd->info->nports; i++)
2664 tty_port_destroy(&brd->ports[i].port);
2665 free_irq(brd->irq, brd);
2666 err_rel3:
2667 pci_release_region(pdev, 3);
2668 err_zero:
2669 brd->info = NULL;
2670 pci_release_region(pdev, 2);
2671 err_dis:
2672 pci_disable_device(pdev);
2673 err:
2674 return retval;
2675 #else
2676 return -ENODEV;
2677 #endif
2678 }
2679
mxser_remove(struct pci_dev * pdev)2680 static void mxser_remove(struct pci_dev *pdev)
2681 {
2682 #ifdef CONFIG_PCI
2683 struct mxser_board *brd = pci_get_drvdata(pdev);
2684
2685 mxser_board_remove(brd);
2686
2687 pci_release_region(pdev, 2);
2688 pci_release_region(pdev, 3);
2689 pci_disable_device(pdev);
2690 brd->info = NULL;
2691 #endif
2692 }
2693
2694 static struct pci_driver mxser_driver = {
2695 .name = "mxser",
2696 .id_table = mxser_pcibrds,
2697 .probe = mxser_probe,
2698 .remove = mxser_remove
2699 };
2700
mxser_module_init(void)2701 static int __init mxser_module_init(void)
2702 {
2703 struct mxser_board *brd;
2704 struct device *tty_dev;
2705 unsigned int b, i, m;
2706 int retval;
2707
2708 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2709 if (!mxvar_sdriver)
2710 return -ENOMEM;
2711
2712 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2713 MXSER_VERSION);
2714
2715 /* Initialize the tty_driver structure */
2716 mxvar_sdriver->name = "ttyMI";
2717 mxvar_sdriver->major = ttymajor;
2718 mxvar_sdriver->minor_start = 0;
2719 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2720 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2721 mxvar_sdriver->init_termios = tty_std_termios;
2722 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2723 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2724 tty_set_operations(mxvar_sdriver, &mxser_ops);
2725
2726 retval = tty_register_driver(mxvar_sdriver);
2727 if (retval) {
2728 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2729 "tty driver !\n");
2730 goto err_put;
2731 }
2732
2733 /* Start finding ISA boards here */
2734 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2735 if (!ioaddr[b])
2736 continue;
2737
2738 brd = &mxser_boards[m];
2739 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2740 if (retval <= 0) {
2741 brd->info = NULL;
2742 continue;
2743 }
2744
2745 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2746 brd->info->name, ioaddr[b]);
2747
2748 /* mxser_initbrd will hook ISR. */
2749 if (mxser_initbrd(brd, NULL) < 0) {
2750 mxser_release_ISA_res(brd);
2751 brd->info = NULL;
2752 continue;
2753 }
2754
2755 brd->idx = m * MXSER_PORTS_PER_BOARD;
2756 for (i = 0; i < brd->info->nports; i++) {
2757 tty_dev = tty_port_register_device(&brd->ports[i].port,
2758 mxvar_sdriver, brd->idx + i, NULL);
2759 if (IS_ERR(tty_dev)) {
2760 for (; i > 0; i--)
2761 tty_unregister_device(mxvar_sdriver,
2762 brd->idx + i - 1);
2763 for (i = 0; i < brd->info->nports; i++)
2764 tty_port_destroy(&brd->ports[i].port);
2765 free_irq(brd->irq, brd);
2766 mxser_release_ISA_res(brd);
2767 brd->info = NULL;
2768 break;
2769 }
2770 }
2771 if (brd->info == NULL)
2772 continue;
2773
2774 m++;
2775 }
2776
2777 retval = pci_register_driver(&mxser_driver);
2778 if (retval) {
2779 printk(KERN_ERR "mxser: can't register pci driver\n");
2780 if (!m) {
2781 retval = -ENODEV;
2782 goto err_unr;
2783 } /* else: we have some ISA cards under control */
2784 }
2785
2786 return 0;
2787 err_unr:
2788 tty_unregister_driver(mxvar_sdriver);
2789 err_put:
2790 put_tty_driver(mxvar_sdriver);
2791 return retval;
2792 }
2793
mxser_module_exit(void)2794 static void __exit mxser_module_exit(void)
2795 {
2796 unsigned int i;
2797
2798 pci_unregister_driver(&mxser_driver);
2799
2800 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2801 if (mxser_boards[i].info != NULL)
2802 mxser_board_remove(&mxser_boards[i]);
2803 tty_unregister_driver(mxvar_sdriver);
2804 put_tty_driver(mxvar_sdriver);
2805
2806 for (i = 0; i < MXSER_BOARDS; i++)
2807 if (mxser_boards[i].info != NULL)
2808 mxser_release_ISA_res(&mxser_boards[i]);
2809 }
2810
2811 module_init(mxser_module_init);
2812 module_exit(mxser_module_exit);
2813