Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Serialport functions for debugging |
2 | * | |
3 | * Copyright (c) 2000 Axis Communications AB | |
4 | * | |
5 | * Authors: Bjorn Wesen | |
6 | * | |
7 | * Exports: | |
8 | * console_print_etrax(char *buf) | |
9 | * int getDebugChar() | |
10 | * putDebugChar(int) | |
11 | * enableDebugIRQ() | |
12 | * init_etrax_debug() | |
13 | * | |
14 | * $Log: debugport.c,v $ | |
05b4c28c MS |
15 | * Revision 1.27 2005/06/10 10:34:14 starvik |
16 | * Real console support | |
17 | * | |
18 | * Revision 1.26 2005/06/07 07:06:07 starvik | |
19 | * Added LF->CR translation to make ETRAX customers happy. | |
20 | * | |
21 | * Revision 1.25 2005/03/08 08:56:47 mikaelam | |
22 | * Do only set index as port->index if port is defined, otherwise use the index from the command line | |
23 | * | |
24 | * Revision 1.24 2005/01/19 10:26:33 mikaelam | |
25 | * Return the cris serial driver in console device driver callback function | |
26 | * | |
27 | * Revision 1.23 2005/01/14 10:12:17 starvik | |
28 | * KGDB on separate port. | |
29 | * Console fixes from 2.4. | |
30 | * | |
31 | * Revision 1.22 2005/01/11 16:06:13 starvik | |
32 | * typo | |
33 | * | |
34 | * Revision 1.21 2005/01/11 13:49:14 starvik | |
35 | * Added raw_printk to be used where we don't trust the console. | |
36 | * | |
37 | * Revision 1.20 2004/12/27 11:18:32 starvik | |
38 | * Merge of Linux 2.6.10 (not functional yet). | |
39 | * | |
1da177e4 LT |
40 | * Revision 1.19 2004/10/21 07:26:16 starvik |
41 | * Made it possible to specify console settings on kernel command line. | |
42 | * | |
43 | * Revision 1.18 2004/10/19 13:07:37 starvik | |
44 | * Merge of Linux 2.6.9 | |
45 | * | |
46 | * Revision 1.17 2004/09/29 10:33:46 starvik | |
47 | * Resolved a dealock when printing debug from kernel. | |
48 | * | |
49 | * Revision 1.16 2004/08/24 06:12:19 starvik | |
50 | * Whitespace cleanup | |
51 | * | |
52 | * Revision 1.15 2004/08/16 12:37:19 starvik | |
53 | * Merge of Linux 2.6.8 | |
54 | * | |
55 | * Revision 1.14 2004/05/17 13:11:29 starvik | |
56 | * Disable DMA until real serial driver is up | |
57 | * | |
58 | * Revision 1.13 2004/05/14 07:58:01 starvik | |
59 | * Merge of changes from 2.4 | |
60 | * | |
61 | * Revision 1.12 2003/09/11 07:29:49 starvik | |
62 | * Merge of Linux 2.6.0-test5 | |
63 | * | |
64 | * Revision 1.11 2003/07/07 09:53:36 starvik | |
65 | * Revert all the 2.5.74 merge changes to make the console work again | |
66 | * | |
67 | * Revision 1.9 2003/02/17 17:07:23 starvik | |
68 | * Solved the problem with corrupted debug output (from Linux 2.4) | |
69 | * * Wait until DMA, FIFO and pipe is empty before and after transmissions | |
70 | * * Buffer data until a FIFO flush can be triggered. | |
71 | * | |
72 | * Revision 1.8 2003/01/22 06:48:36 starvik | |
73 | * Fixed warnings issued by GCC 3.2.1 | |
74 | * | |
75 | * Revision 1.7 2002/12/12 08:26:32 starvik | |
76 | * Don't use C-comments inside CVS comments | |
77 | * | |
78 | * Revision 1.6 2002/12/11 15:42:02 starvik | |
79 | * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/ | |
80 | * | |
81 | * Revision 1.5 2002/11/20 06:58:03 starvik | |
82 | * Compiles with kgdb | |
83 | * | |
84 | * Revision 1.4 2002/11/19 14:35:24 starvik | |
85 | * Changes from linux 2.4 | |
86 | * Changed struct initializer syntax to the currently prefered notation | |
87 | * | |
88 | * Revision 1.3 2002/11/06 09:47:03 starvik | |
89 | * Modified for new interrupt macros | |
90 | * | |
91 | * Revision 1.2 2002/01/21 15:21:50 bjornw | |
92 | * Update for kdev_t changes | |
93 | * | |
94 | * Revision 1.6 2001/04/17 13:58:39 orjanf | |
95 | * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB. | |
96 | * | |
97 | * Revision 1.5 2001/03/26 14:22:05 bjornw | |
98 | * Namechange of some config options | |
99 | * | |
100 | * Revision 1.4 2000/10/06 12:37:26 bjornw | |
101 | * Use physical addresses when talking to DMA | |
102 | * | |
103 | * | |
104 | */ | |
105 | ||
106 | #include <linux/config.h> | |
107 | #include <linux/console.h> | |
108 | #include <linux/init.h> | |
109 | #include <linux/major.h> | |
110 | #include <linux/delay.h> | |
111 | #include <linux/tty.h> | |
112 | #include <asm/system.h> | |
113 | #include <asm/arch/svinto.h> | |
114 | #include <asm/io.h> /* Get SIMCOUT. */ | |
115 | ||
116 | struct dbg_port | |
117 | { | |
118 | unsigned int index; | |
119 | const volatile unsigned* read; | |
120 | volatile char* write; | |
121 | volatile unsigned* xoff; | |
122 | volatile char* baud; | |
123 | volatile char* tr_ctrl; | |
124 | volatile char* rec_ctrl; | |
125 | unsigned long irq; | |
126 | unsigned int started; | |
127 | unsigned long baudrate; | |
128 | unsigned char parity; | |
129 | unsigned int bits; | |
130 | }; | |
131 | ||
132 | struct dbg_port ports[]= | |
133 | { | |
134 | { | |
135 | 0, | |
136 | R_SERIAL0_READ, | |
137 | R_SERIAL0_TR_DATA, | |
138 | R_SERIAL0_XOFF, | |
139 | R_SERIAL0_BAUD, | |
140 | R_SERIAL0_TR_CTRL, | |
141 | R_SERIAL0_REC_CTRL, | |
05b4c28c MS |
142 | IO_STATE(R_IRQ_MASK1_SET, ser0_data, set), |
143 | 0, | |
144 | 115200, | |
145 | 'N', | |
146 | 8 | |
1da177e4 LT |
147 | }, |
148 | { | |
149 | 1, | |
150 | R_SERIAL1_READ, | |
151 | R_SERIAL1_TR_DATA, | |
152 | R_SERIAL1_XOFF, | |
153 | R_SERIAL1_BAUD, | |
154 | R_SERIAL1_TR_CTRL, | |
155 | R_SERIAL1_REC_CTRL, | |
05b4c28c MS |
156 | IO_STATE(R_IRQ_MASK1_SET, ser1_data, set), |
157 | 0, | |
158 | 115200, | |
159 | 'N', | |
160 | 8 | |
1da177e4 LT |
161 | }, |
162 | { | |
163 | 2, | |
164 | R_SERIAL2_READ, | |
165 | R_SERIAL2_TR_DATA, | |
166 | R_SERIAL2_XOFF, | |
167 | R_SERIAL2_BAUD, | |
168 | R_SERIAL2_TR_CTRL, | |
169 | R_SERIAL2_REC_CTRL, | |
05b4c28c MS |
170 | IO_STATE(R_IRQ_MASK1_SET, ser2_data, set), |
171 | 0, | |
172 | 115200, | |
173 | 'N', | |
174 | 8 | |
1da177e4 LT |
175 | }, |
176 | { | |
177 | 3, | |
178 | R_SERIAL3_READ, | |
179 | R_SERIAL3_TR_DATA, | |
180 | R_SERIAL3_XOFF, | |
181 | R_SERIAL3_BAUD, | |
182 | R_SERIAL3_TR_CTRL, | |
183 | R_SERIAL3_REC_CTRL, | |
05b4c28c MS |
184 | IO_STATE(R_IRQ_MASK1_SET, ser3_data, set), |
185 | 0, | |
186 | 115200, | |
187 | 'N', | |
188 | 8 | |
1da177e4 LT |
189 | } |
190 | }; | |
191 | ||
05b4c28c | 192 | extern struct tty_driver *serial_driver; |
1da177e4 LT |
193 | |
194 | struct dbg_port* port = | |
195 | #if defined(CONFIG_ETRAX_DEBUG_PORT0) | |
196 | &ports[0]; | |
197 | #elif defined(CONFIG_ETRAX_DEBUG_PORT1) | |
198 | &ports[1]; | |
199 | #elif defined(CONFIG_ETRAX_DEBUG_PORT2) | |
200 | &ports[2]; | |
201 | #elif defined(CONFIG_ETRAX_DEBUG_PORT3) | |
202 | &ports[3]; | |
203 | #else | |
204 | NULL; | |
205 | #endif | |
1da177e4 | 206 | |
05b4c28c MS |
207 | static struct dbg_port* kgdb_port = |
208 | #if defined(CONFIG_ETRAX_KGDB_PORT0) | |
209 | &ports[0]; | |
210 | #elif defined(CONFIG_ETRAX_KGDB_PORT1) | |
211 | &ports[1]; | |
212 | #elif defined(CONFIG_ETRAX_KGDB_PORT2) | |
213 | &ports[2]; | |
214 | #elif defined(CONFIG_ETRAX_KGDB_PORT3) | |
215 | &ports[3]; | |
216 | #else | |
217 | NULL; | |
218 | #endif | |
1da177e4 LT |
219 | |
220 | static void | |
05b4c28c | 221 | start_port(struct dbg_port* p) |
1da177e4 LT |
222 | { |
223 | unsigned long rec_ctrl = 0; | |
224 | unsigned long tr_ctrl = 0; | |
225 | ||
05b4c28c | 226 | if (!p) |
1da177e4 LT |
227 | return; |
228 | ||
05b4c28c | 229 | if (p->started) |
1da177e4 | 230 | return; |
05b4c28c | 231 | p->started = 1; |
1da177e4 | 232 | |
05b4c28c | 233 | if (p->index == 0) |
1da177e4 LT |
234 | { |
235 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6); | |
236 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, unused); | |
237 | } | |
05b4c28c | 238 | else if (p->index == 1) |
1da177e4 LT |
239 | { |
240 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8); | |
241 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, usb); | |
242 | } | |
05b4c28c | 243 | else if (p->index == 2) |
1da177e4 LT |
244 | { |
245 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2); | |
246 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, par0); | |
247 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma3); | |
248 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma3, par0); | |
249 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, ser2, select); | |
250 | } | |
251 | else | |
252 | { | |
253 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4); | |
254 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, par1); | |
255 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma5); | |
256 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, par1); | |
257 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, ser3, select); | |
258 | } | |
259 | ||
260 | *R_GEN_CONFIG = genconfig_shadow; | |
261 | ||
05b4c28c | 262 | *p->xoff = |
1da177e4 LT |
263 | IO_STATE(R_SERIAL0_XOFF, tx_stop, enable) | |
264 | IO_STATE(R_SERIAL0_XOFF, auto_xoff, disable) | | |
265 | IO_FIELD(R_SERIAL0_XOFF, xoff_char, 0); | |
266 | ||
05b4c28c | 267 | switch (p->baudrate) |
1da177e4 LT |
268 | { |
269 | case 0: | |
270 | case 115200: | |
05b4c28c | 271 | *p->baud = |
1da177e4 LT |
272 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c115k2Hz) | |
273 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c115k2Hz); | |
274 | break; | |
275 | case 1200: | |
05b4c28c | 276 | *p->baud = |
1da177e4 LT |
277 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c1200Hz) | |
278 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c1200Hz); | |
279 | break; | |
280 | case 2400: | |
05b4c28c | 281 | *p->baud = |
1da177e4 LT |
282 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c2400Hz) | |
283 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c2400Hz); | |
284 | break; | |
285 | case 4800: | |
05b4c28c | 286 | *p->baud = |
1da177e4 LT |
287 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c4800Hz) | |
288 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c4800Hz); | |
289 | break; | |
290 | case 9600: | |
05b4c28c | 291 | *p->baud = |
1da177e4 LT |
292 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c9600Hz) | |
293 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c9600Hz); | |
294 | break; | |
295 | case 19200: | |
05b4c28c | 296 | *p->baud = |
1da177e4 LT |
297 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c19k2Hz) | |
298 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c19k2Hz); | |
299 | break; | |
300 | case 38400: | |
05b4c28c | 301 | *p->baud = |
1da177e4 LT |
302 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c38k4Hz) | |
303 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c38k4Hz); | |
304 | break; | |
305 | case 57600: | |
05b4c28c | 306 | *p->baud = |
1da177e4 LT |
307 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c57k6Hz) | |
308 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c57k6Hz); | |
309 | break; | |
310 | default: | |
05b4c28c | 311 | *p->baud = |
1da177e4 LT |
312 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c115k2Hz) | |
313 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c115k2Hz); | |
314 | break; | |
315 | } | |
316 | ||
05b4c28c | 317 | if (p->parity == 'E') { |
1da177e4 LT |
318 | rec_ctrl = |
319 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par, even) | | |
320 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable); | |
321 | tr_ctrl = | |
322 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par, even) | | |
323 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable); | |
05b4c28c | 324 | } else if (p->parity == 'O') { |
1da177e4 LT |
325 | rec_ctrl = |
326 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par, odd) | | |
327 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable); | |
328 | tr_ctrl = | |
329 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par, odd) | | |
330 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable); | |
331 | } else { | |
332 | rec_ctrl = | |
333 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par, even) | | |
334 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, disable); | |
335 | tr_ctrl = | |
336 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par, even) | | |
337 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, disable); | |
338 | } | |
05b4c28c | 339 | if (p->bits == 7) |
1da177e4 LT |
340 | { |
341 | rec_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_7bit); | |
342 | tr_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_7bit); | |
343 | } | |
344 | else | |
345 | { | |
346 | rec_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_8bit); | |
347 | tr_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_8bit); | |
348 | } | |
349 | ||
05b4c28c | 350 | *p->rec_ctrl = |
1da177e4 LT |
351 | IO_STATE(R_SERIAL0_REC_CTRL, dma_err, stop) | |
352 | IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable) | | |
353 | IO_STATE(R_SERIAL0_REC_CTRL, rts_, active) | | |
354 | IO_STATE(R_SERIAL0_REC_CTRL, sampling, middle) | | |
355 | IO_STATE(R_SERIAL0_REC_CTRL, rec_stick_par, normal) | | |
356 | rec_ctrl; | |
357 | ||
05b4c28c | 358 | *p->tr_ctrl = |
1da177e4 LT |
359 | IO_FIELD(R_SERIAL0_TR_CTRL, txd, 0) | |
360 | IO_STATE(R_SERIAL0_TR_CTRL, tr_enable, enable) | | |
361 | IO_STATE(R_SERIAL0_TR_CTRL, auto_cts, disabled) | | |
362 | IO_STATE(R_SERIAL0_TR_CTRL, stop_bits, one_bit) | | |
363 | IO_STATE(R_SERIAL0_TR_CTRL, tr_stick_par, normal) | | |
364 | tr_ctrl; | |
365 | } | |
366 | ||
367 | static void | |
368 | console_write_direct(struct console *co, const char *buf, unsigned int len) | |
369 | { | |
370 | int i; | |
371 | unsigned long flags; | |
372 | local_irq_save(flags); | |
05b4c28c MS |
373 | |
374 | if (!port) | |
375 | return; | |
376 | ||
1da177e4 LT |
377 | /* Send data */ |
378 | for (i = 0; i < len; i++) { | |
05b4c28c MS |
379 | /* LF -> CRLF */ |
380 | if (buf[i] == '\n') { | |
381 | while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready))) | |
382 | ; | |
383 | *port->write = '\r'; | |
384 | } | |
1da177e4 LT |
385 | /* Wait until transmitter is ready and send.*/ |
386 | while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready))) | |
387 | ; | |
388 | *port->write = buf[i]; | |
389 | } | |
390 | local_irq_restore(flags); | |
391 | } | |
392 | ||
05b4c28c MS |
393 | int raw_printk(const char *fmt, ...) |
394 | { | |
395 | static char buf[1024]; | |
396 | int printed_len; | |
397 | static int first = 1; | |
398 | if (first) { | |
399 | /* Force reinitialization of the port to get manual mode. */ | |
400 | port->started = 0; | |
401 | start_port(port); | |
402 | first = 0; | |
403 | } | |
404 | va_list args; | |
405 | va_start(args, fmt); | |
406 | printed_len = vsnprintf(buf, sizeof(buf), fmt, args); | |
407 | va_end(args); | |
408 | console_write_direct(NULL, buf, strlen(buf)); | |
409 | return printed_len; | |
410 | } | |
411 | ||
1da177e4 LT |
412 | static void |
413 | console_write(struct console *co, const char *buf, unsigned int len) | |
414 | { | |
415 | if (!port) | |
416 | return; | |
417 | ||
418 | #ifdef CONFIG_SVINTO_SIM | |
419 | /* no use to simulate the serial debug output */ | |
420 | SIMCOUT(buf, len); | |
421 | return; | |
422 | #endif | |
423 | ||
05b4c28c | 424 | console_write_direct(co, buf, len); |
1da177e4 LT |
425 | } |
426 | ||
427 | /* legacy function */ | |
428 | ||
429 | void | |
430 | console_print_etrax(const char *buf) | |
431 | { | |
432 | console_write(NULL, buf, strlen(buf)); | |
433 | } | |
434 | ||
435 | /* Use polling to get a single character FROM the debug port */ | |
436 | ||
437 | int | |
438 | getDebugChar(void) | |
439 | { | |
440 | unsigned long readval; | |
441 | ||
05b4c28c MS |
442 | if (!kgdb_port) |
443 | return 0; | |
444 | ||
1da177e4 | 445 | do { |
05b4c28c | 446 | readval = *kgdb_port->read; |
1da177e4 LT |
447 | } while (!(readval & IO_MASK(R_SERIAL0_READ, data_avail))); |
448 | ||
449 | return (readval & IO_MASK(R_SERIAL0_READ, data_in)); | |
450 | } | |
451 | ||
452 | /* Use polling to put a single character to the debug port */ | |
453 | ||
454 | void | |
455 | putDebugChar(int val) | |
456 | { | |
05b4c28c MS |
457 | if (!kgdb_port) |
458 | return; | |
459 | ||
460 | while (!(*kgdb_port->read & IO_MASK(R_SERIAL0_READ, tr_ready))) | |
1da177e4 | 461 | ; |
05b4c28c | 462 | *kgdb_port->write = val; |
1da177e4 LT |
463 | } |
464 | ||
465 | /* Enable irq for receiving chars on the debug port, used by kgdb */ | |
466 | ||
467 | void | |
468 | enableDebugIRQ(void) | |
469 | { | |
05b4c28c MS |
470 | if (!kgdb_port) |
471 | return; | |
472 | ||
473 | *R_IRQ_MASK1_SET = kgdb_port->irq; | |
1da177e4 LT |
474 | /* use R_VECT_MASK directly, since we really bypass Linux normal |
475 | * IRQ handling in kgdb anyway, we don't need to use enable_irq | |
476 | */ | |
477 | *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set); | |
478 | ||
05b4c28c | 479 | *kgdb_port->rec_ctrl = IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable); |
1da177e4 LT |
480 | } |
481 | ||
482 | static int __init | |
483 | console_setup(struct console *co, char *options) | |
484 | { | |
485 | char* s; | |
486 | ||
487 | if (options) { | |
488 | port = &ports[co->index]; | |
489 | port->baudrate = 115200; | |
490 | port->parity = 'N'; | |
491 | port->bits = 8; | |
492 | port->baudrate = simple_strtoul(options, NULL, 10); | |
493 | s = options; | |
494 | while(*s >= '0' && *s <= '9') | |
495 | s++; | |
496 | if (*s) port->parity = *s++; | |
497 | if (*s) port->bits = *s++ - '0'; | |
498 | port->started = 0; | |
05b4c28c | 499 | start_port(0); |
1da177e4 LT |
500 | } |
501 | return 0; | |
502 | } | |
503 | ||
05b4c28c MS |
504 | /* This is a dummy serial device that throws away anything written to it. |
505 | * This is used when no debug output is wanted. | |
506 | */ | |
507 | static struct tty_driver dummy_driver; | |
508 | ||
509 | static int dummy_open(struct tty_struct *tty, struct file * filp) | |
510 | { | |
511 | return 0; | |
512 | } | |
513 | ||
514 | static void dummy_close(struct tty_struct *tty, struct file * filp) | |
515 | { | |
516 | } | |
517 | ||
518 | static int dummy_write(struct tty_struct * tty, | |
519 | const unsigned char *buf, int count) | |
520 | { | |
521 | return count; | |
522 | } | |
523 | ||
524 | static int | |
525 | dummy_write_room(struct tty_struct *tty) | |
526 | { | |
527 | return 8192; | |
528 | } | |
529 | ||
530 | void __init | |
531 | init_dummy_console(void) | |
532 | { | |
533 | memset(&dummy_driver, 0, sizeof(struct tty_driver)); | |
534 | dummy_driver.driver_name = "serial"; | |
535 | dummy_driver.name = "ttyS"; | |
536 | dummy_driver.major = TTY_MAJOR; | |
537 | dummy_driver.minor_start = 68; | |
538 | dummy_driver.num = 1; /* etrax100 has 4 serial ports */ | |
539 | dummy_driver.type = TTY_DRIVER_TYPE_SERIAL; | |
540 | dummy_driver.subtype = SERIAL_TYPE_NORMAL; | |
541 | dummy_driver.init_termios = tty_std_termios; | |
542 | dummy_driver.init_termios.c_cflag = | |
543 | B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ | |
331b8319 | 544 | dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
05b4c28c MS |
545 | |
546 | dummy_driver.open = dummy_open; | |
547 | dummy_driver.close = dummy_close; | |
548 | dummy_driver.write = dummy_write; | |
549 | dummy_driver.write_room = dummy_write_room; | |
550 | if (tty_register_driver(&dummy_driver)) | |
551 | panic("Couldn't register dummy serial driver\n"); | |
552 | } | |
553 | ||
554 | static struct tty_driver* | |
555 | etrax_console_device(struct console* co, int *index) | |
556 | { | |
557 | if (port) | |
558 | *index = port->index; | |
559 | return port ? serial_driver : &dummy_driver; | |
560 | } | |
561 | ||
1da177e4 LT |
562 | static struct console sercons = { |
563 | name : "ttyS", | |
564 | write: console_write, | |
565 | read : NULL, | |
566 | device : etrax_console_device, | |
567 | unblank : NULL, | |
568 | setup : console_setup, | |
569 | flags : CON_PRINTBUFFER, | |
570 | index : -1, | |
571 | cflag : 0, | |
572 | next : NULL | |
573 | }; | |
574 | static struct console sercons0 = { | |
575 | name : "ttyS", | |
576 | write: console_write, | |
577 | read : NULL, | |
578 | device : etrax_console_device, | |
579 | unblank : NULL, | |
580 | setup : console_setup, | |
581 | flags : CON_PRINTBUFFER, | |
582 | index : 0, | |
583 | cflag : 0, | |
584 | next : NULL | |
585 | }; | |
586 | ||
587 | static struct console sercons1 = { | |
588 | name : "ttyS", | |
589 | write: console_write, | |
590 | read : NULL, | |
591 | device : etrax_console_device, | |
592 | unblank : NULL, | |
593 | setup : console_setup, | |
594 | flags : CON_PRINTBUFFER, | |
595 | index : 1, | |
596 | cflag : 0, | |
597 | next : NULL | |
598 | }; | |
599 | static struct console sercons2 = { | |
600 | name : "ttyS", | |
601 | write: console_write, | |
602 | read : NULL, | |
603 | device : etrax_console_device, | |
604 | unblank : NULL, | |
605 | setup : console_setup, | |
606 | flags : CON_PRINTBUFFER, | |
607 | index : 2, | |
608 | cflag : 0, | |
609 | next : NULL | |
610 | }; | |
611 | static struct console sercons3 = { | |
612 | name : "ttyS", | |
613 | write: console_write, | |
614 | read : NULL, | |
615 | device : etrax_console_device, | |
616 | unblank : NULL, | |
617 | setup : console_setup, | |
618 | flags : CON_PRINTBUFFER, | |
619 | index : 3, | |
620 | cflag : 0, | |
621 | next : NULL | |
622 | }; | |
623 | /* | |
624 | * Register console (for printk's etc) | |
625 | */ | |
626 | ||
627 | int __init | |
628 | init_etrax_debug(void) | |
629 | { | |
630 | static int first = 1; | |
631 | ||
632 | if (!first) { | |
05b4c28c MS |
633 | unregister_console(&sercons); |
634 | register_console(&sercons0); | |
635 | register_console(&sercons1); | |
636 | register_console(&sercons2); | |
637 | register_console(&sercons3); | |
638 | init_dummy_console(); | |
1da177e4 LT |
639 | return 0; |
640 | } | |
1da177e4 | 641 | |
05b4c28c MS |
642 | first = 0; |
643 | register_console(&sercons); | |
644 | start_port(port); | |
645 | #ifdef CONFIG_ETRAX_KGDB | |
646 | start_port(kgdb_port); | |
647 | #endif | |
1da177e4 LT |
648 | return 0; |
649 | } | |
1da177e4 | 650 | __initcall(init_etrax_debug); |