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51533b61 MS |
1 | /* |
2 | * Copyright (C) 2003, Axis Communications AB. | |
3 | */ | |
4 | ||
5 | #include <linux/config.h> | |
6 | #include <linux/console.h> | |
7 | #include <linux/init.h> | |
8 | #include <linux/major.h> | |
9 | #include <linux/delay.h> | |
10 | #include <linux/tty.h> | |
11 | #include <asm/system.h> | |
12 | #include <asm/io.h> | |
13 | #include <asm/arch/hwregs/ser_defs.h> | |
14 | #include <asm/arch/hwregs/dma_defs.h> | |
15 | #include <asm/arch/pinmux.h> | |
16 | ||
17 | #include <asm/irq.h> | |
18 | #include <asm/arch/hwregs/intr_vect_defs.h> | |
19 | ||
20 | struct dbg_port | |
21 | { | |
22 | unsigned char nbr; | |
23 | unsigned long instance; | |
24 | unsigned int started; | |
25 | unsigned long baudrate; | |
26 | unsigned char parity; | |
27 | unsigned int bits; | |
28 | }; | |
29 | ||
30 | struct dbg_port ports[] = | |
31 | { | |
32 | { | |
33 | 0, | |
34 | regi_ser0, | |
35 | 0, | |
36 | 115200, | |
37 | 'N', | |
38 | 8 | |
39 | }, | |
40 | { | |
41 | 1, | |
42 | regi_ser1, | |
43 | 0, | |
44 | 115200, | |
45 | 'N', | |
46 | 8 | |
47 | }, | |
48 | { | |
49 | 2, | |
50 | regi_ser2, | |
51 | 0, | |
52 | 115200, | |
53 | 'N', | |
54 | 8 | |
55 | }, | |
56 | { | |
57 | 3, | |
58 | regi_ser3, | |
59 | 0, | |
60 | 115200, | |
61 | 'N', | |
62 | 8 | |
63 | } | |
64 | }; | |
65 | static struct dbg_port *port = | |
66 | #if defined(CONFIG_ETRAX_DEBUG_PORT0) | |
67 | &ports[0]; | |
68 | #elif defined(CONFIG_ETRAX_DEBUG_PORT1) | |
69 | &ports[1]; | |
70 | #elif defined(CONFIG_ETRAX_DEBUG_PORT2) | |
71 | &ports[2]; | |
72 | #elif defined(CONFIG_ETRAX_DEBUG_PORT3) | |
73 | &ports[3]; | |
74 | #else | |
75 | NULL; | |
76 | #endif | |
77 | ||
78 | #ifdef CONFIG_ETRAX_KGDB | |
79 | static struct dbg_port *kgdb_port = | |
80 | #if defined(CONFIG_ETRAX_KGDB_PORT0) | |
81 | &ports[0]; | |
82 | #elif defined(CONFIG_ETRAX_KGDB_PORT1) | |
83 | &ports[1]; | |
84 | #elif defined(CONFIG_ETRAX_KGDB_PORT2) | |
85 | &ports[2]; | |
86 | #elif defined(CONFIG_ETRAX_KGDB_PORT3) | |
87 | &ports[3]; | |
88 | #else | |
89 | NULL; | |
90 | #endif | |
91 | #endif | |
92 | ||
93 | #ifdef CONFIG_ETRAXFS_SIM | |
94 | extern void print_str( const char *str ); | |
95 | static char buffer[1024]; | |
96 | static char msg[] = "Debug: "; | |
97 | static int buffer_pos = sizeof(msg) - 1; | |
98 | #endif | |
99 | ||
100 | extern struct tty_driver *serial_driver; | |
101 | ||
102 | static void | |
103 | start_port(struct dbg_port* p) | |
104 | { | |
105 | if (!p) | |
106 | return; | |
107 | ||
108 | if (p->started) | |
109 | return; | |
110 | p->started = 1; | |
111 | ||
112 | if (p->nbr == 1) | |
113 | crisv32_pinmux_alloc_fixed(pinmux_ser1); | |
114 | else if (p->nbr == 2) | |
115 | crisv32_pinmux_alloc_fixed(pinmux_ser2); | |
116 | else if (p->nbr == 3) | |
117 | crisv32_pinmux_alloc_fixed(pinmux_ser3); | |
118 | ||
119 | /* Set up serial port registers */ | |
120 | reg_ser_rw_tr_ctrl tr_ctrl = {0}; | |
121 | reg_ser_rw_tr_dma_en tr_dma_en = {0}; | |
122 | ||
123 | reg_ser_rw_rec_ctrl rec_ctrl = {0}; | |
124 | reg_ser_rw_tr_baud_div tr_baud_div = {0}; | |
125 | reg_ser_rw_rec_baud_div rec_baud_div = {0}; | |
126 | ||
127 | tr_ctrl.base_freq = rec_ctrl.base_freq = regk_ser_f29_493; | |
128 | tr_dma_en.en = rec_ctrl.dma_mode = regk_ser_no; | |
129 | tr_baud_div.div = rec_baud_div.div = 29493000 / p->baudrate / 8; | |
130 | tr_ctrl.en = rec_ctrl.en = 1; | |
131 | ||
132 | if (p->parity == 'O') | |
133 | { | |
134 | tr_ctrl.par_en = regk_ser_yes; | |
135 | tr_ctrl.par = regk_ser_odd; | |
136 | rec_ctrl.par_en = regk_ser_yes; | |
137 | rec_ctrl.par = regk_ser_odd; | |
138 | } | |
139 | else if (p->parity == 'E') | |
140 | { | |
141 | tr_ctrl.par_en = regk_ser_yes; | |
142 | tr_ctrl.par = regk_ser_even; | |
143 | rec_ctrl.par_en = regk_ser_yes; | |
144 | rec_ctrl.par = regk_ser_odd; | |
145 | } | |
146 | ||
147 | if (p->bits == 7) | |
148 | { | |
149 | tr_ctrl.data_bits = regk_ser_bits7; | |
150 | rec_ctrl.data_bits = regk_ser_bits7; | |
151 | } | |
152 | ||
153 | REG_WR (ser, p->instance, rw_tr_baud_div, tr_baud_div); | |
154 | REG_WR (ser, p->instance, rw_rec_baud_div, rec_baud_div); | |
155 | REG_WR (ser, p->instance, rw_tr_dma_en, tr_dma_en); | |
156 | REG_WR (ser, p->instance, rw_tr_ctrl, tr_ctrl); | |
157 | REG_WR (ser, p->instance, rw_rec_ctrl, rec_ctrl); | |
158 | } | |
159 | ||
160 | /* No debug */ | |
161 | #ifdef CONFIG_ETRAX_DEBUG_PORT_NULL | |
162 | ||
163 | static void | |
164 | console_write(struct console *co, const char *buf, unsigned int len) | |
165 | { | |
166 | return; | |
167 | } | |
168 | ||
169 | /* Target debug */ | |
170 | #elif !defined(CONFIG_ETRAXFS_SIM) | |
171 | ||
172 | static void | |
173 | console_write_direct(struct console *co, const char *buf, unsigned int len) | |
174 | { | |
175 | int i; | |
176 | reg_ser_r_stat_din stat; | |
177 | reg_ser_rw_tr_dma_en tr_dma_en, old; | |
178 | ||
179 | /* Switch to manual mode */ | |
180 | tr_dma_en = old = REG_RD (ser, port->instance, rw_tr_dma_en); | |
181 | if (tr_dma_en.en == regk_ser_yes) { | |
182 | tr_dma_en.en = regk_ser_no; | |
183 | REG_WR(ser, port->instance, rw_tr_dma_en, tr_dma_en); | |
184 | } | |
185 | ||
186 | /* Send data */ | |
187 | for (i = 0; i < len; i++) { | |
188 | /* LF -> CRLF */ | |
189 | if (buf[i] == '\n') { | |
190 | do { | |
191 | stat = REG_RD (ser, port->instance, r_stat_din); | |
192 | } while (!stat.tr_rdy); | |
193 | REG_WR_INT (ser, port->instance, rw_dout, '\r'); | |
194 | } | |
195 | /* Wait until transmitter is ready and send.*/ | |
196 | do { | |
197 | stat = REG_RD (ser, port->instance, r_stat_din); | |
198 | } while (!stat.tr_rdy); | |
199 | REG_WR_INT (ser, port->instance, rw_dout, buf[i]); | |
200 | } | |
201 | ||
202 | /* Restore mode */ | |
203 | if (tr_dma_en.en != old.en) | |
204 | REG_WR(ser, port->instance, rw_tr_dma_en, old); | |
205 | } | |
206 | ||
207 | static void | |
208 | console_write(struct console *co, const char *buf, unsigned int len) | |
209 | { | |
210 | if (!port) | |
211 | return; | |
212 | console_write_direct(co, buf, len); | |
213 | } | |
214 | ||
215 | ||
216 | ||
217 | #else | |
218 | ||
219 | /* VCS debug */ | |
220 | ||
221 | static void | |
222 | console_write(struct console *co, const char *buf, unsigned int len) | |
223 | { | |
224 | char* pos; | |
225 | pos = memchr(buf, '\n', len); | |
226 | if (pos) { | |
227 | int l = ++pos - buf; | |
228 | memcpy(buffer + buffer_pos, buf, l); | |
229 | memcpy(buffer, msg, sizeof(msg) - 1); | |
230 | buffer[buffer_pos + l] = '\0'; | |
231 | print_str(buffer); | |
232 | buffer_pos = sizeof(msg) - 1; | |
233 | if (pos - buf != len) { | |
234 | memcpy(buffer + buffer_pos, pos, len - l); | |
235 | buffer_pos += len - l; | |
236 | } | |
237 | } else { | |
238 | memcpy(buffer + buffer_pos, buf, len); | |
239 | buffer_pos += len; | |
240 | } | |
241 | } | |
242 | ||
243 | #endif | |
244 | ||
245 | int raw_printk(const char *fmt, ...) | |
246 | { | |
247 | static char buf[1024]; | |
248 | int printed_len; | |
249 | va_list args; | |
250 | va_start(args, fmt); | |
251 | printed_len = vsnprintf(buf, sizeof(buf), fmt, args); | |
252 | va_end(args); | |
253 | console_write(NULL, buf, strlen(buf)); | |
254 | return printed_len; | |
255 | } | |
256 | ||
257 | void | |
258 | stupid_debug(char* buf) | |
259 | { | |
260 | console_write(NULL, buf, strlen(buf)); | |
261 | } | |
262 | ||
263 | #ifdef CONFIG_ETRAX_KGDB | |
264 | /* Use polling to get a single character from the kernel debug port */ | |
265 | int | |
266 | getDebugChar(void) | |
267 | { | |
268 | reg_ser_rs_status_data stat; | |
269 | reg_ser_rw_ack_intr ack_intr = { 0 }; | |
270 | ||
271 | do { | |
272 | stat = REG_RD(ser, kgdb_instance, rs_status_data); | |
273 | } while (!stat.data_avail); | |
274 | ||
275 | /* Ack the data_avail interrupt. */ | |
276 | ack_intr.data_avail = 1; | |
277 | REG_WR(ser, kgdb_instance, rw_ack_intr, ack_intr); | |
278 | ||
279 | return stat.data; | |
280 | } | |
281 | ||
282 | /* Use polling to put a single character to the kernel debug port */ | |
283 | void | |
284 | putDebugChar(int val) | |
285 | { | |
286 | reg_ser_r_status_data stat; | |
287 | do { | |
288 | stat = REG_RD (ser, kgdb_instance, r_status_data); | |
289 | } while (!stat.tr_ready); | |
290 | REG_WR (ser, kgdb_instance, rw_data_out, REG_TYPE_CONV(reg_ser_rw_data_out, int, val)); | |
291 | } | |
292 | #endif /* CONFIG_ETRAX_KGDB */ | |
293 | ||
294 | static int __init | |
295 | console_setup(struct console *co, char *options) | |
296 | { | |
297 | char* s; | |
298 | ||
299 | if (options) { | |
300 | port = &ports[co->index]; | |
301 | port->baudrate = 115200; | |
302 | port->parity = 'N'; | |
303 | port->bits = 8; | |
304 | port->baudrate = simple_strtoul(options, NULL, 10); | |
305 | s = options; | |
306 | while(*s >= '0' && *s <= '9') | |
307 | s++; | |
308 | if (*s) port->parity = *s++; | |
309 | if (*s) port->bits = *s++ - '0'; | |
310 | port->started = 0; | |
311 | start_port(port); | |
312 | } | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* This is a dummy serial device that throws away anything written to it. | |
317 | * This is used when no debug output is wanted. | |
318 | */ | |
319 | static struct tty_driver dummy_driver; | |
320 | ||
321 | static int dummy_open(struct tty_struct *tty, struct file * filp) | |
322 | { | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static void dummy_close(struct tty_struct *tty, struct file * filp) | |
327 | { | |
328 | } | |
329 | ||
330 | static int dummy_write(struct tty_struct * tty, | |
331 | const unsigned char *buf, int count) | |
332 | { | |
333 | return count; | |
334 | } | |
335 | ||
336 | static int | |
337 | dummy_write_room(struct tty_struct *tty) | |
338 | { | |
339 | return 8192; | |
340 | } | |
341 | ||
342 | void __init | |
343 | init_dummy_console(void) | |
344 | { | |
345 | memset(&dummy_driver, 0, sizeof(struct tty_driver)); | |
346 | dummy_driver.driver_name = "serial"; | |
347 | dummy_driver.name = "ttyS"; | |
348 | dummy_driver.major = TTY_MAJOR; | |
349 | dummy_driver.minor_start = 68; | |
350 | dummy_driver.num = 1; /* etrax100 has 4 serial ports */ | |
351 | dummy_driver.type = TTY_DRIVER_TYPE_SERIAL; | |
352 | dummy_driver.subtype = SERIAL_TYPE_NORMAL; | |
353 | dummy_driver.init_termios = tty_std_termios; | |
354 | dummy_driver.init_termios.c_cflag = | |
355 | B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ | |
331b8319 | 356 | dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
51533b61 MS |
357 | |
358 | dummy_driver.open = dummy_open; | |
359 | dummy_driver.close = dummy_close; | |
360 | dummy_driver.write = dummy_write; | |
361 | dummy_driver.write_room = dummy_write_room; | |
362 | if (tty_register_driver(&dummy_driver)) | |
363 | panic("Couldn't register dummy serial driver\n"); | |
364 | } | |
365 | ||
366 | static struct tty_driver* | |
367 | crisv32_console_device(struct console* co, int *index) | |
368 | { | |
369 | if (port) | |
370 | *index = port->nbr; | |
371 | return port ? serial_driver : &dummy_driver; | |
372 | } | |
373 | ||
374 | static struct console sercons = { | |
375 | name : "ttyS", | |
376 | write: console_write, | |
377 | read : NULL, | |
378 | device : crisv32_console_device, | |
379 | unblank : NULL, | |
380 | setup : console_setup, | |
381 | flags : CON_PRINTBUFFER, | |
382 | index : -1, | |
383 | cflag : 0, | |
384 | next : NULL | |
385 | }; | |
386 | static struct console sercons0 = { | |
387 | name : "ttyS", | |
388 | write: console_write, | |
389 | read : NULL, | |
390 | device : crisv32_console_device, | |
391 | unblank : NULL, | |
392 | setup : console_setup, | |
393 | flags : CON_PRINTBUFFER, | |
394 | index : 0, | |
395 | cflag : 0, | |
396 | next : NULL | |
397 | }; | |
398 | ||
399 | static struct console sercons1 = { | |
400 | name : "ttyS", | |
401 | write: console_write, | |
402 | read : NULL, | |
403 | device : crisv32_console_device, | |
404 | unblank : NULL, | |
405 | setup : console_setup, | |
406 | flags : CON_PRINTBUFFER, | |
407 | index : 1, | |
408 | cflag : 0, | |
409 | next : NULL | |
410 | }; | |
411 | static struct console sercons2 = { | |
412 | name : "ttyS", | |
413 | write: console_write, | |
414 | read : NULL, | |
415 | device : crisv32_console_device, | |
416 | unblank : NULL, | |
417 | setup : console_setup, | |
418 | flags : CON_PRINTBUFFER, | |
419 | index : 2, | |
420 | cflag : 0, | |
421 | next : NULL | |
422 | }; | |
423 | static struct console sercons3 = { | |
424 | name : "ttyS", | |
425 | write: console_write, | |
426 | read : NULL, | |
427 | device : crisv32_console_device, | |
428 | unblank : NULL, | |
429 | setup : console_setup, | |
430 | flags : CON_PRINTBUFFER, | |
431 | index : 3, | |
432 | cflag : 0, | |
433 | next : NULL | |
434 | }; | |
435 | ||
436 | /* Register console for printk's, etc. */ | |
437 | int __init | |
438 | init_etrax_debug(void) | |
439 | { | |
440 | static int first = 1; | |
441 | ||
442 | if (!first) { | |
443 | unregister_console(&sercons); | |
444 | register_console(&sercons0); | |
445 | register_console(&sercons1); | |
446 | register_console(&sercons2); | |
447 | register_console(&sercons3); | |
448 | init_dummy_console(); | |
449 | return 0; | |
450 | } | |
451 | first = 0; | |
452 | register_console(&sercons); | |
453 | start_port(port); | |
454 | ||
455 | #ifdef CONFIG_ETRAX_KGDB | |
456 | start_port(kgdb_port); | |
457 | #endif /* CONFIG_ETRAX_KGDB */ | |
458 | return 0; | |
459 | } | |
460 | ||
461 | __initcall(init_etrax_debug); |