Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/serial/sh-sci.c | |
3 | * | |
4 | * SuperH on-chip serial module support. (SCI with no FIFO / with FIFO) | |
5 | * | |
6 | * Copyright (C) 2002, 2003, 2004 Paul Mundt | |
7 | * | |
8 | * based off of the old drivers/char/sh-sci.c by: | |
9 | * | |
10 | * Copyright (C) 1999, 2000 Niibe Yutaka | |
11 | * Copyright (C) 2000 Sugioka Toshinobu | |
12 | * Modified to support multiple serial ports. Stuart Menefy (May 2000). | |
13 | * Modified to support SecureEdge. David McCullough (2002) | |
14 | * Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003). | |
15 | * | |
16 | * This file is subject to the terms and conditions of the GNU General Public | |
17 | * License. See the file "COPYING" in the main directory of this archive | |
18 | * for more details. | |
19 | */ | |
20 | ||
21 | #undef DEBUG | |
22 | ||
1da177e4 LT |
23 | #include <linux/module.h> |
24 | #include <linux/errno.h> | |
25 | #include <linux/signal.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/timer.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/tty.h> | |
30 | #include <linux/tty_flip.h> | |
31 | #include <linux/serial.h> | |
32 | #include <linux/major.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/sysrq.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/ptrace.h> | |
37 | #include <linux/ioport.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/console.h> | |
43 | #include <linux/bitops.h> | |
b7a76e4b | 44 | #include <linux/generic_serial.h> |
1da177e4 LT |
45 | |
46 | #ifdef CONFIG_CPU_FREQ | |
47 | #include <linux/notifier.h> | |
48 | #include <linux/cpufreq.h> | |
49 | #endif | |
50 | ||
51 | #include <asm/system.h> | |
52 | #include <asm/io.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/uaccess.h> | |
55 | ||
b7a76e4b PM |
56 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) |
57 | #include <asm/clock.h> | |
58 | #endif | |
1da177e4 LT |
59 | |
60 | #ifdef CONFIG_SH_STANDARD_BIOS | |
61 | #include <asm/sh_bios.h> | |
62 | #endif | |
63 | ||
64 | #if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
65 | #define SUPPORT_SYSRQ | |
66 | #endif | |
67 | ||
68 | #include "sh-sci.h" | |
69 | ||
70 | #ifdef CONFIG_SH_KGDB | |
71 | #include <asm/kgdb.h> | |
72 | ||
73 | static int kgdb_get_char(struct sci_port *port); | |
74 | static void kgdb_put_char(struct sci_port *port, char c); | |
75 | static void kgdb_handle_error(struct sci_port *port); | |
76 | static struct sci_port *kgdb_sci_port; | |
77 | #endif /* CONFIG_SH_KGDB */ | |
78 | ||
79 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE | |
80 | static struct sci_port *serial_console_port = 0; | |
81 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ | |
82 | ||
83 | /* Function prototypes */ | |
b129a8cc RK |
84 | static void sci_stop_tx(struct uart_port *port); |
85 | static void sci_start_tx(struct uart_port *port); | |
1da177e4 LT |
86 | static void sci_start_rx(struct uart_port *port, unsigned int tty_start); |
87 | static void sci_stop_rx(struct uart_port *port); | |
88 | static int sci_request_irq(struct sci_port *port); | |
89 | static void sci_free_irq(struct sci_port *port); | |
90 | ||
b7a76e4b | 91 | static struct sci_port sci_ports[]; |
1da177e4 LT |
92 | static struct uart_driver sci_uart_driver; |
93 | ||
b7a76e4b PM |
94 | #define SCI_NPORTS sci_uart_driver.nr |
95 | ||
1da177e4 LT |
96 | #if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) |
97 | ||
98 | static void handle_error(struct uart_port *port) | |
99 | { /* Clear error flags */ | |
100 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); | |
101 | } | |
102 | ||
103 | static int get_char(struct uart_port *port) | |
104 | { | |
105 | unsigned long flags; | |
106 | unsigned short status; | |
107 | int c; | |
108 | ||
109 | local_irq_save(flags); | |
110 | do { | |
111 | status = sci_in(port, SCxSR); | |
112 | if (status & SCxSR_ERRORS(port)) { | |
113 | handle_error(port); | |
114 | continue; | |
115 | } | |
116 | } while (!(status & SCxSR_RDxF(port))); | |
117 | c = sci_in(port, SCxRDR); | |
118 | sci_in(port, SCxSR); /* Dummy read */ | |
119 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); | |
120 | local_irq_restore(flags); | |
121 | ||
122 | return c; | |
123 | } | |
124 | ||
125 | /* Taken from sh-stub.c of GDB 4.18 */ | |
126 | static const char hexchars[] = "0123456789abcdef"; | |
127 | ||
128 | static __inline__ char highhex(int x) | |
129 | { | |
130 | return hexchars[(x >> 4) & 0xf]; | |
131 | } | |
132 | ||
133 | static __inline__ char lowhex(int x) | |
134 | { | |
135 | return hexchars[x & 0xf]; | |
136 | } | |
137 | ||
138 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ | |
139 | ||
140 | /* | |
141 | * Send the packet in buffer. The host gets one chance to read it. | |
142 | * This routine does not wait for a positive acknowledge. | |
143 | */ | |
144 | ||
145 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE | |
146 | static void put_char(struct uart_port *port, char c) | |
147 | { | |
148 | unsigned long flags; | |
149 | unsigned short status; | |
150 | ||
151 | local_irq_save(flags); | |
152 | ||
153 | do { | |
154 | status = sci_in(port, SCxSR); | |
155 | } while (!(status & SCxSR_TDxE(port))); | |
156 | ||
157 | sci_out(port, SCxTDR, c); | |
158 | sci_in(port, SCxSR); /* Dummy read */ | |
159 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); | |
160 | ||
161 | local_irq_restore(flags); | |
162 | } | |
163 | ||
164 | static void put_string(struct sci_port *sci_port, const char *buffer, int count) | |
165 | { | |
166 | struct uart_port *port = &sci_port->port; | |
167 | const unsigned char *p = buffer; | |
168 | int i; | |
169 | ||
170 | #if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB) | |
171 | int checksum; | |
172 | int usegdb=0; | |
173 | ||
174 | #ifdef CONFIG_SH_STANDARD_BIOS | |
b7a76e4b | 175 | /* This call only does a trap the first time it is |
1da177e4 LT |
176 | * called, and so is safe to do here unconditionally |
177 | */ | |
178 | usegdb |= sh_bios_in_gdb_mode(); | |
179 | #endif | |
180 | #ifdef CONFIG_SH_KGDB | |
181 | usegdb |= (kgdb_in_gdb_mode && (port == kgdb_sci_port)); | |
182 | #endif | |
183 | ||
184 | if (usegdb) { | |
185 | /* $<packet info>#<checksum>. */ | |
186 | do { | |
187 | unsigned char c; | |
188 | put_char(port, '$'); | |
189 | put_char(port, 'O'); /* 'O'utput to console */ | |
190 | checksum = 'O'; | |
191 | ||
192 | for (i=0; i<count; i++) { /* Don't use run length encoding */ | |
193 | int h, l; | |
194 | ||
195 | c = *p++; | |
196 | h = highhex(c); | |
197 | l = lowhex(c); | |
198 | put_char(port, h); | |
199 | put_char(port, l); | |
200 | checksum += h + l; | |
201 | } | |
202 | put_char(port, '#'); | |
203 | put_char(port, highhex(checksum)); | |
204 | put_char(port, lowhex(checksum)); | |
205 | } while (get_char(port) != '+'); | |
206 | } else | |
207 | #endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */ | |
208 | for (i=0; i<count; i++) { | |
209 | if (*p == 10) | |
210 | put_char(port, '\r'); | |
211 | put_char(port, *p++); | |
212 | } | |
213 | } | |
214 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ | |
215 | ||
216 | ||
217 | #ifdef CONFIG_SH_KGDB | |
218 | ||
219 | /* Is the SCI ready, ie is there a char waiting? */ | |
220 | static int kgdb_is_char_ready(struct sci_port *port) | |
221 | { | |
222 | unsigned short status = sci_in(port, SCxSR); | |
223 | ||
224 | if (status & (SCxSR_ERRORS(port) | SCxSR_BRK(port))) | |
225 | kgdb_handle_error(port); | |
226 | ||
227 | return (status & SCxSR_RDxF(port)); | |
228 | } | |
229 | ||
230 | /* Write a char */ | |
231 | static void kgdb_put_char(struct sci_port *port, char c) | |
232 | { | |
233 | unsigned short status; | |
234 | ||
235 | do | |
236 | status = sci_in(port, SCxSR); | |
237 | while (!(status & SCxSR_TDxE(port))); | |
238 | ||
239 | sci_out(port, SCxTDR, c); | |
240 | sci_in(port, SCxSR); /* Dummy read */ | |
241 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); | |
242 | } | |
243 | ||
244 | /* Get a char if there is one, else ret -1 */ | |
245 | static int kgdb_get_char(struct sci_port *port) | |
246 | { | |
247 | int c; | |
248 | ||
249 | if (kgdb_is_char_ready(port) == 0) | |
250 | c = -1; | |
251 | else { | |
252 | c = sci_in(port, SCxRDR); | |
253 | sci_in(port, SCxSR); /* Dummy read */ | |
254 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); | |
255 | } | |
256 | ||
257 | return c; | |
258 | } | |
259 | ||
260 | /* Called from kgdbstub.c to get a character, i.e. is blocking */ | |
261 | static int kgdb_sci_getchar(void) | |
262 | { | |
263 | volatile int c; | |
264 | ||
265 | /* Keep trying to read a character, this could be neater */ | |
266 | while ((c = kgdb_get_char(kgdb_sci_port)) < 0); | |
267 | ||
268 | return c; | |
269 | } | |
270 | ||
271 | /* Called from kgdbstub.c to put a character, just a wrapper */ | |
272 | static void kgdb_sci_putchar(int c) | |
273 | { | |
274 | ||
275 | kgdb_put_char(kgdb_sci_port, c); | |
276 | } | |
277 | ||
278 | /* Clear any errors on the SCI */ | |
279 | static void kgdb_handle_error(struct sci_port *port) | |
280 | { | |
281 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); /* Clear error flags */ | |
282 | } | |
283 | ||
284 | /* Breakpoint if there's a break sent on the serial port */ | |
285 | static void kgdb_break_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
286 | { | |
287 | struct sci_port *port = ptr; | |
288 | unsigned short status = sci_in(port, SCxSR); | |
289 | ||
290 | if (status & SCxSR_BRK(port)) { | |
291 | ||
292 | /* Break into the debugger if a break is detected */ | |
293 | BREAKPOINT(); | |
294 | ||
295 | /* Clear */ | |
296 | sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); | |
297 | } | |
298 | } | |
299 | ||
300 | #endif /* CONFIG_SH_KGDB */ | |
301 | ||
302 | #if defined(__H8300S__) | |
303 | enum { sci_disable, sci_enable }; | |
304 | ||
305 | static void h8300_sci_enable(struct uart_port* port, unsigned int ctrl) | |
306 | { | |
307 | volatile unsigned char *mstpcrl=(volatile unsigned char *)MSTPCRL; | |
308 | int ch = (port->mapbase - SMR0) >> 3; | |
309 | unsigned char mask = 1 << (ch+1); | |
310 | ||
311 | if (ctrl == sci_disable) { | |
312 | *mstpcrl |= mask; | |
313 | } else { | |
314 | *mstpcrl &= ~mask; | |
315 | } | |
316 | } | |
317 | #endif | |
318 | ||
319 | #if defined(SCI_ONLY) || defined(SCI_AND_SCIF) | |
320 | #if defined(__H8300H__) || defined(__H8300S__) | |
321 | static void sci_init_pins_sci(struct uart_port* port, unsigned int cflag) | |
322 | { | |
323 | int ch = (port->mapbase - SMR0) >> 3; | |
324 | ||
325 | /* set DDR regs */ | |
326 | H8300_GPIO_DDR(h8300_sci_pins[ch].port,h8300_sci_pins[ch].rx,H8300_GPIO_INPUT); | |
327 | H8300_GPIO_DDR(h8300_sci_pins[ch].port,h8300_sci_pins[ch].tx,H8300_GPIO_OUTPUT); | |
328 | /* tx mark output*/ | |
329 | H8300_SCI_DR(ch) |= h8300_sci_pins[ch].tx; | |
330 | } | |
1da177e4 LT |
331 | #endif |
332 | #endif | |
333 | ||
334 | #if defined(SCIF_ONLY) || defined(SCI_AND_SCIF) | |
b7a76e4b PM |
335 | #if defined(CONFIG_CPU_SUBTYPE_SH7300) |
336 | /* SH7300 doesn't use RTS/CTS */ | |
337 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) | |
338 | { | |
339 | sci_out(port, SCFCR, 0); | |
340 | } | |
341 | #elif defined(CONFIG_CPU_SH3) | |
342 | /* For SH7705, SH7707, SH7709, SH7709A, SH7729 */ | |
1da177e4 LT |
343 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) |
344 | { | |
345 | unsigned int fcr_val = 0; | |
b7a76e4b PM |
346 | unsigned short data; |
347 | ||
348 | /* We need to set SCPCR to enable RTS/CTS */ | |
349 | data = ctrl_inw(SCPCR); | |
350 | /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/ | |
351 | ctrl_outw(data & 0x0fcf, SCPCR); | |
1da177e4 | 352 | |
1da177e4 LT |
353 | if (cflag & CRTSCTS) |
354 | fcr_val |= SCFCR_MCE; | |
355 | else { | |
1da177e4 LT |
356 | /* We need to set SCPCR to enable RTS/CTS */ |
357 | data = ctrl_inw(SCPCR); | |
358 | /* Clear out SCP7MD1,0, SCP4MD1,0, | |
359 | Set SCP6MD1,0 = {01} (output) */ | |
b7a76e4b | 360 | ctrl_outw((data & 0x0fcf) | 0x1000, SCPCR); |
1da177e4 LT |
361 | |
362 | data = ctrl_inb(SCPDR); | |
363 | /* Set /RTS2 (bit6) = 0 */ | |
b7a76e4b | 364 | ctrl_outb(data & 0xbf, SCPDR); |
1da177e4 | 365 | } |
b7a76e4b | 366 | |
1da177e4 LT |
367 | sci_out(port, SCFCR, fcr_val); |
368 | } | |
369 | ||
b7a76e4b | 370 | #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) |
1da177e4 LT |
371 | static void sci_init_pins_irda(struct uart_port *port, unsigned int cflag) |
372 | { | |
373 | unsigned int fcr_val = 0; | |
374 | ||
375 | if (cflag & CRTSCTS) | |
376 | fcr_val |= SCFCR_MCE; | |
377 | ||
378 | sci_out(port, SCFCR, fcr_val); | |
379 | } | |
b7a76e4b | 380 | #endif |
1da177e4 LT |
381 | #else |
382 | ||
383 | /* For SH7750 */ | |
384 | static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag) | |
385 | { | |
386 | unsigned int fcr_val = 0; | |
387 | ||
388 | if (cflag & CRTSCTS) { | |
389 | fcr_val |= SCFCR_MCE; | |
390 | } else { | |
b7a76e4b PM |
391 | #ifdef CONFIG_CPU_SUBTYPE_SH7780 |
392 | ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */ | |
393 | #else | |
1da177e4 | 394 | ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */ |
b7a76e4b | 395 | #endif |
1da177e4 LT |
396 | } |
397 | sci_out(port, SCFCR, fcr_val); | |
398 | } | |
399 | ||
400 | #endif | |
401 | #endif /* SCIF_ONLY || SCI_AND_SCIF */ | |
402 | ||
403 | /* ********************************************************************** * | |
404 | * the interrupt related routines * | |
405 | * ********************************************************************** */ | |
406 | ||
407 | static void sci_transmit_chars(struct uart_port *port) | |
408 | { | |
409 | struct circ_buf *xmit = &port->info->xmit; | |
410 | unsigned int stopped = uart_tx_stopped(port); | |
411 | unsigned long flags; | |
412 | unsigned short status; | |
413 | unsigned short ctrl; | |
414 | int count, txroom; | |
415 | ||
416 | status = sci_in(port, SCxSR); | |
417 | if (!(status & SCxSR_TDxE(port))) { | |
418 | local_irq_save(flags); | |
419 | ctrl = sci_in(port, SCSCR); | |
420 | if (uart_circ_empty(xmit)) { | |
421 | ctrl &= ~SCI_CTRL_FLAGS_TIE; | |
422 | } else { | |
423 | ctrl |= SCI_CTRL_FLAGS_TIE; | |
424 | } | |
425 | sci_out(port, SCSCR, ctrl); | |
426 | local_irq_restore(flags); | |
427 | return; | |
428 | } | |
429 | ||
430 | #if !defined(SCI_ONLY) | |
431 | if (port->type == PORT_SCIF) { | |
b7a76e4b PM |
432 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) || defined(CONFIG_CPU_SUBTYPE_SH7780) |
433 | txroom = SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0x7f); | |
434 | #else | |
1da177e4 | 435 | txroom = SCIF_TXROOM_MAX - (sci_in(port, SCFDR)>>8); |
b7a76e4b | 436 | #endif |
1da177e4 LT |
437 | } else { |
438 | txroom = (sci_in(port, SCxSR) & SCI_TDRE)?1:0; | |
439 | } | |
440 | #else | |
441 | txroom = (sci_in(port, SCxSR) & SCI_TDRE)?1:0; | |
442 | #endif | |
443 | ||
444 | count = txroom; | |
445 | ||
446 | do { | |
447 | unsigned char c; | |
448 | ||
449 | if (port->x_char) { | |
450 | c = port->x_char; | |
451 | port->x_char = 0; | |
452 | } else if (!uart_circ_empty(xmit) && !stopped) { | |
453 | c = xmit->buf[xmit->tail]; | |
454 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
455 | } else { | |
456 | break; | |
457 | } | |
458 | ||
459 | sci_out(port, SCxTDR, c); | |
460 | ||
461 | port->icount.tx++; | |
462 | } while (--count > 0); | |
463 | ||
464 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); | |
465 | ||
466 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
467 | uart_write_wakeup(port); | |
468 | if (uart_circ_empty(xmit)) { | |
b129a8cc | 469 | sci_stop_tx(port); |
1da177e4 LT |
470 | } else { |
471 | local_irq_save(flags); | |
472 | ctrl = sci_in(port, SCSCR); | |
473 | ||
474 | #if !defined(SCI_ONLY) | |
475 | if (port->type == PORT_SCIF) { | |
476 | sci_in(port, SCxSR); /* Dummy read */ | |
477 | sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); | |
478 | } | |
479 | #endif | |
480 | ||
481 | ctrl |= SCI_CTRL_FLAGS_TIE; | |
482 | sci_out(port, SCSCR, ctrl); | |
483 | local_irq_restore(flags); | |
484 | } | |
485 | } | |
486 | ||
487 | /* On SH3, SCIF may read end-of-break as a space->mark char */ | |
488 | #define STEPFN(c) ({int __c=(c); (((__c-1)|(__c)) == -1); }) | |
489 | ||
490 | static inline void sci_receive_chars(struct uart_port *port, | |
491 | struct pt_regs *regs) | |
492 | { | |
493 | struct tty_struct *tty = port->info->tty; | |
494 | int i, count, copied = 0; | |
495 | unsigned short status; | |
33f0f88f | 496 | unsigned char flag; |
1da177e4 LT |
497 | |
498 | status = sci_in(port, SCxSR); | |
499 | if (!(status & SCxSR_RDxF(port))) | |
500 | return; | |
501 | ||
502 | while (1) { | |
503 | #if !defined(SCI_ONLY) | |
504 | if (port->type == PORT_SCIF) { | |
b7a76e4b PM |
505 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) || defined(CONFIG_CPU_SUBTYPE_SH7780) |
506 | count = sci_in(port, SCRFDR) & 0x7f; | |
507 | #else | |
1da177e4 | 508 | count = sci_in(port, SCFDR)&SCIF_RFDC_MASK ; |
b7a76e4b | 509 | #endif |
1da177e4 LT |
510 | } else { |
511 | count = (sci_in(port, SCxSR)&SCxSR_RDxF(port))?1:0; | |
512 | } | |
513 | #else | |
514 | count = (sci_in(port, SCxSR)&SCxSR_RDxF(port))?1:0; | |
515 | #endif | |
516 | ||
517 | /* Don't copy more bytes than there is room for in the buffer */ | |
33f0f88f | 518 | count = tty_buffer_request_room(tty, count); |
1da177e4 LT |
519 | |
520 | /* If for any reason we can't copy more data, we're done! */ | |
521 | if (count == 0) | |
522 | break; | |
523 | ||
524 | if (port->type == PORT_SCI) { | |
525 | char c = sci_in(port, SCxRDR); | |
526 | if(((struct sci_port *)port)->break_flag | |
527 | || uart_handle_sysrq_char(port, c, regs)) { | |
528 | count = 0; | |
529 | } else { | |
33f0f88f | 530 | tty_insert_flip_char(tty, c, TTY_NORMAL); |
1da177e4 LT |
531 | } |
532 | } else { | |
533 | for (i=0; i<count; i++) { | |
534 | char c = sci_in(port, SCxRDR); | |
535 | status = sci_in(port, SCxSR); | |
536 | #if defined(CONFIG_CPU_SH3) | |
537 | /* Skip "chars" during break */ | |
538 | if (((struct sci_port *)port)->break_flag) { | |
539 | if ((c == 0) && | |
540 | (status & SCxSR_FER(port))) { | |
541 | count--; i--; | |
542 | continue; | |
543 | } | |
544 | /* Nonzero => end-of-break */ | |
545 | pr_debug("scif: debounce<%02x>\n", c); | |
546 | ((struct sci_port *)port)->break_flag = 0; | |
547 | if (STEPFN(c)) { | |
548 | count--; i--; | |
549 | continue; | |
550 | } | |
551 | } | |
552 | #endif /* CONFIG_CPU_SH3 */ | |
553 | if (uart_handle_sysrq_char(port, c, regs)) { | |
554 | count--; i--; | |
555 | continue; | |
556 | } | |
557 | ||
558 | /* Store data and status */ | |
1da177e4 | 559 | if (status&SCxSR_FER(port)) { |
33f0f88f | 560 | flag = TTY_FRAME; |
1da177e4 LT |
561 | pr_debug("sci: frame error\n"); |
562 | } else if (status&SCxSR_PER(port)) { | |
33f0f88f | 563 | flag = TTY_PARITY; |
1da177e4 | 564 | pr_debug("sci: parity error\n"); |
33f0f88f AC |
565 | } else |
566 | flag = TTY_NORMAL; | |
567 | tty_insert_flip_char(tty, c, flag); | |
1da177e4 LT |
568 | } |
569 | } | |
570 | ||
571 | sci_in(port, SCxSR); /* dummy read */ | |
572 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); | |
573 | ||
1da177e4 LT |
574 | copied += count; |
575 | port->icount.rx += count; | |
576 | } | |
577 | ||
578 | if (copied) { | |
579 | /* Tell the rest of the system the news. New characters! */ | |
580 | tty_flip_buffer_push(tty); | |
581 | } else { | |
582 | sci_in(port, SCxSR); /* dummy read */ | |
583 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); | |
584 | } | |
585 | } | |
586 | ||
587 | #define SCI_BREAK_JIFFIES (HZ/20) | |
588 | /* The sci generates interrupts during the break, | |
589 | * 1 per millisecond or so during the break period, for 9600 baud. | |
590 | * So dont bother disabling interrupts. | |
591 | * But dont want more than 1 break event. | |
592 | * Use a kernel timer to periodically poll the rx line until | |
593 | * the break is finished. | |
594 | */ | |
595 | static void sci_schedule_break_timer(struct sci_port *port) | |
596 | { | |
597 | port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES; | |
598 | add_timer(&port->break_timer); | |
599 | } | |
600 | /* Ensure that two consecutive samples find the break over. */ | |
601 | static void sci_break_timer(unsigned long data) | |
602 | { | |
603 | struct sci_port * port = (struct sci_port *)data; | |
604 | if(sci_rxd_in(&port->port) == 0) { | |
605 | port->break_flag = 1; | |
606 | sci_schedule_break_timer(port); | |
607 | } else if(port->break_flag == 1){ | |
608 | /* break is over. */ | |
609 | port->break_flag = 2; | |
610 | sci_schedule_break_timer(port); | |
611 | } else port->break_flag = 0; | |
612 | } | |
613 | ||
614 | static inline int sci_handle_errors(struct uart_port *port) | |
615 | { | |
616 | int copied = 0; | |
617 | unsigned short status = sci_in(port, SCxSR); | |
618 | struct tty_struct *tty = port->info->tty; | |
619 | ||
33f0f88f | 620 | if (status&SCxSR_ORER(port)) { |
1da177e4 | 621 | /* overrun error */ |
33f0f88f AC |
622 | if(tty_insert_flip_char(tty, 0, TTY_OVERRUN)) |
623 | copied++; | |
1da177e4 LT |
624 | pr_debug("sci: overrun error\n"); |
625 | } | |
626 | ||
33f0f88f | 627 | if (status&SCxSR_FER(port)) { |
1da177e4 LT |
628 | if (sci_rxd_in(port) == 0) { |
629 | /* Notify of BREAK */ | |
630 | struct sci_port * sci_port = (struct sci_port *)port; | |
33f0f88f AC |
631 | if(!sci_port->break_flag) { |
632 | sci_port->break_flag = 1; | |
633 | sci_schedule_break_timer((struct sci_port *)port); | |
1da177e4 | 634 | /* Do sysrq handling. */ |
33f0f88f | 635 | if(uart_handle_break(port)) |
1da177e4 | 636 | return 0; |
1da177e4 | 637 | pr_debug("sci: BREAK detected\n"); |
33f0f88f AC |
638 | if(tty_insert_flip_char(tty, 0, TTY_BREAK)) |
639 | copied++; | |
1da177e4 LT |
640 | } |
641 | } | |
642 | else { | |
643 | /* frame error */ | |
33f0f88f AC |
644 | if(tty_insert_flip_char(tty, 0, TTY_FRAME)) |
645 | copied++; | |
1da177e4 LT |
646 | pr_debug("sci: frame error\n"); |
647 | } | |
648 | } | |
649 | ||
33f0f88f AC |
650 | if (status&SCxSR_PER(port)) { |
651 | if(tty_insert_flip_char(tty, 0, TTY_PARITY)) | |
652 | copied++; | |
1da177e4 | 653 | /* parity error */ |
1da177e4 LT |
654 | pr_debug("sci: parity error\n"); |
655 | } | |
656 | ||
33f0f88f | 657 | if (copied) |
1da177e4 | 658 | tty_flip_buffer_push(tty); |
1da177e4 LT |
659 | |
660 | return copied; | |
661 | } | |
662 | ||
663 | static inline int sci_handle_breaks(struct uart_port *port) | |
664 | { | |
665 | int copied = 0; | |
666 | unsigned short status = sci_in(port, SCxSR); | |
667 | struct tty_struct *tty = port->info->tty; | |
668 | struct sci_port *s = &sci_ports[port->line]; | |
669 | ||
b7a76e4b | 670 | if (!s->break_flag && status & SCxSR_BRK(port)) { |
1da177e4 LT |
671 | #if defined(CONFIG_CPU_SH3) |
672 | /* Debounce break */ | |
673 | s->break_flag = 1; | |
674 | #endif | |
675 | /* Notify of BREAK */ | |
33f0f88f AC |
676 | if(tty_insert_flip_char(tty, 0, TTY_BREAK)) |
677 | copied++; | |
1da177e4 LT |
678 | pr_debug("sci: BREAK detected\n"); |
679 | } | |
680 | ||
681 | #if defined(SCIF_ORER) | |
682 | /* XXX: Handle SCIF overrun error */ | |
683 | if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) { | |
684 | sci_out(port, SCLSR, 0); | |
33f0f88f | 685 | if(tty_insert_flip_char(tty, 0, TTY_OVERRUN)) { |
1da177e4 | 686 | copied++; |
1da177e4 LT |
687 | pr_debug("sci: overrun error\n"); |
688 | } | |
689 | } | |
690 | #endif | |
691 | ||
33f0f88f | 692 | if (copied) |
1da177e4 | 693 | tty_flip_buffer_push(tty); |
1da177e4 LT |
694 | return copied; |
695 | } | |
696 | ||
697 | static irqreturn_t sci_rx_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
698 | { | |
699 | struct uart_port *port = ptr; | |
700 | ||
701 | /* I think sci_receive_chars has to be called irrespective | |
702 | * of whether the I_IXOFF is set, otherwise, how is the interrupt | |
703 | * to be disabled? | |
704 | */ | |
705 | sci_receive_chars(port, regs); | |
706 | ||
707 | return IRQ_HANDLED; | |
708 | } | |
709 | ||
710 | static irqreturn_t sci_tx_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
711 | { | |
712 | struct uart_port *port = ptr; | |
713 | ||
714 | sci_transmit_chars(port); | |
715 | ||
716 | return IRQ_HANDLED; | |
717 | } | |
718 | ||
719 | static irqreturn_t sci_er_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
720 | { | |
721 | struct uart_port *port = ptr; | |
722 | ||
723 | /* Handle errors */ | |
724 | if (port->type == PORT_SCI) { | |
725 | if (sci_handle_errors(port)) { | |
726 | /* discard character in rx buffer */ | |
727 | sci_in(port, SCxSR); | |
728 | sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); | |
729 | } | |
730 | } else { | |
731 | #if defined(SCIF_ORER) | |
732 | if((sci_in(port, SCLSR) & SCIF_ORER) != 0) { | |
733 | struct tty_struct *tty = port->info->tty; | |
734 | ||
735 | sci_out(port, SCLSR, 0); | |
33f0f88f AC |
736 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
737 | tty_flip_buffer_push(tty); | |
738 | pr_debug("scif: overrun error\n"); | |
1da177e4 LT |
739 | } |
740 | #endif | |
741 | sci_rx_interrupt(irq, ptr, regs); | |
742 | } | |
743 | ||
744 | sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); | |
745 | ||
746 | /* Kick the transmission */ | |
747 | sci_tx_interrupt(irq, ptr, regs); | |
748 | ||
749 | return IRQ_HANDLED; | |
750 | } | |
751 | ||
752 | static irqreturn_t sci_br_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
753 | { | |
754 | struct uart_port *port = ptr; | |
755 | ||
756 | /* Handle BREAKs */ | |
757 | sci_handle_breaks(port); | |
758 | sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); | |
759 | ||
760 | return IRQ_HANDLED; | |
761 | } | |
762 | ||
763 | static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
764 | { | |
765 | unsigned short ssr_status, scr_status; | |
766 | struct uart_port *port = ptr; | |
767 | ||
768 | ssr_status = sci_in(port,SCxSR); | |
769 | scr_status = sci_in(port,SCSCR); | |
770 | ||
771 | /* Tx Interrupt */ | |
772 | if ((ssr_status&0x0020) && (scr_status&0x0080)) | |
773 | sci_tx_interrupt(irq, ptr, regs); | |
774 | /* Rx Interrupt */ | |
775 | if ((ssr_status&0x0002) && (scr_status&0x0040)) | |
776 | sci_rx_interrupt(irq, ptr, regs); | |
777 | /* Error Interrupt */ | |
778 | if ((ssr_status&0x0080) && (scr_status&0x0400)) | |
779 | sci_er_interrupt(irq, ptr, regs); | |
780 | /* Break Interrupt */ | |
781 | if ((ssr_status&0x0010) && (scr_status&0x0200)) | |
782 | sci_br_interrupt(irq, ptr, regs); | |
783 | ||
784 | return IRQ_HANDLED; | |
785 | } | |
786 | ||
787 | #ifdef CONFIG_CPU_FREQ | |
788 | /* | |
789 | * Here we define a transistion notifier so that we can update all of our | |
790 | * ports' baud rate when the peripheral clock changes. | |
791 | */ | |
792 | static int sci_notifier(struct notifier_block *self, unsigned long phase, void *p) | |
793 | { | |
794 | struct cpufreq_freqs *freqs = p; | |
795 | int i; | |
796 | ||
797 | if ((phase == CPUFREQ_POSTCHANGE) || | |
798 | (phase == CPUFREQ_RESUMECHANGE)){ | |
799 | for (i = 0; i < SCI_NPORTS; i++) { | |
800 | struct uart_port *port = &sci_ports[i].port; | |
b7a76e4b | 801 | struct clk *clk; |
1da177e4 LT |
802 | |
803 | /* | |
804 | * Update the uartclk per-port if frequency has | |
805 | * changed, since it will no longer necessarily be | |
806 | * consistent with the old frequency. | |
807 | * | |
808 | * Really we want to be able to do something like | |
809 | * uart_change_speed() or something along those lines | |
810 | * here to implicitly reset the per-port baud rate.. | |
811 | * | |
812 | * Clean this up later.. | |
813 | */ | |
b7a76e4b PM |
814 | clk = clk_get("module_clk"); |
815 | port->uartclk = clk_get_rate(clk) * 16; | |
816 | clk_put(clk); | |
1da177e4 LT |
817 | } |
818 | ||
819 | printk("%s: got a postchange notification for cpu %d (old %d, new %d)\n", | |
820 | __FUNCTION__, freqs->cpu, freqs->old, freqs->new); | |
821 | } | |
822 | ||
823 | return NOTIFY_OK; | |
824 | } | |
825 | ||
826 | static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 }; | |
827 | #endif /* CONFIG_CPU_FREQ */ | |
828 | ||
829 | static int sci_request_irq(struct sci_port *port) | |
830 | { | |
831 | int i; | |
832 | irqreturn_t (*handlers[4])(int irq, void *ptr, struct pt_regs *regs) = { | |
833 | sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt, | |
834 | sci_br_interrupt, | |
835 | }; | |
836 | const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full", | |
837 | "SCI Transmit Data Empty", "SCI Break" }; | |
838 | ||
839 | if (port->irqs[0] == port->irqs[1]) { | |
840 | if (!port->irqs[0]) { | |
841 | printk(KERN_ERR "sci: Cannot allocate irq.(IRQ=0)\n"); | |
842 | return -ENODEV; | |
843 | } | |
844 | if (request_irq(port->irqs[0], sci_mpxed_interrupt, SA_INTERRUPT, | |
845 | "sci", port)) { | |
846 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); | |
847 | return -ENODEV; | |
848 | } | |
849 | } else { | |
850 | for (i = 0; i < ARRAY_SIZE(handlers); i++) { | |
851 | if (!port->irqs[i]) | |
852 | continue; | |
853 | if (request_irq(port->irqs[i], handlers[i], SA_INTERRUPT, | |
854 | desc[i], port)) { | |
855 | printk(KERN_ERR "sci: Cannot allocate irq.\n"); | |
856 | return -ENODEV; | |
857 | } | |
858 | } | |
859 | } | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | static void sci_free_irq(struct sci_port *port) | |
865 | { | |
866 | int i; | |
867 | ||
868 | if (port->irqs[0] == port->irqs[1]) { | |
869 | if (!port->irqs[0]) | |
870 | printk("sci: sci_free_irq error\n"); | |
871 | else | |
872 | free_irq(port->irqs[0], port); | |
873 | } else { | |
874 | for (i = 0; i < ARRAY_SIZE(port->irqs); i++) { | |
875 | if (!port->irqs[i]) | |
876 | continue; | |
877 | ||
878 | free_irq(port->irqs[i], port); | |
879 | } | |
880 | } | |
881 | } | |
882 | ||
883 | static unsigned int sci_tx_empty(struct uart_port *port) | |
884 | { | |
885 | /* Can't detect */ | |
886 | return TIOCSER_TEMT; | |
887 | } | |
888 | ||
889 | static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
890 | { | |
891 | /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */ | |
892 | /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */ | |
893 | /* If you have signals for DTR and DCD, please implement here. */ | |
894 | } | |
895 | ||
896 | static unsigned int sci_get_mctrl(struct uart_port *port) | |
897 | { | |
898 | /* This routine is used for geting signals of: DTR, DCD, DSR, RI, | |
899 | and CTS/RTS */ | |
900 | ||
901 | return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR; | |
902 | } | |
903 | ||
b129a8cc | 904 | static void sci_start_tx(struct uart_port *port) |
1da177e4 LT |
905 | { |
906 | struct sci_port *s = &sci_ports[port->line]; | |
907 | ||
908 | disable_irq(s->irqs[SCIx_TXI_IRQ]); | |
909 | sci_transmit_chars(port); | |
910 | enable_irq(s->irqs[SCIx_TXI_IRQ]); | |
911 | } | |
912 | ||
b129a8cc | 913 | static void sci_stop_tx(struct uart_port *port) |
1da177e4 LT |
914 | { |
915 | unsigned long flags; | |
916 | unsigned short ctrl; | |
917 | ||
918 | /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */ | |
919 | local_irq_save(flags); | |
920 | ctrl = sci_in(port, SCSCR); | |
921 | ctrl &= ~SCI_CTRL_FLAGS_TIE; | |
922 | sci_out(port, SCSCR, ctrl); | |
923 | local_irq_restore(flags); | |
924 | } | |
925 | ||
926 | static void sci_start_rx(struct uart_port *port, unsigned int tty_start) | |
927 | { | |
928 | unsigned long flags; | |
929 | unsigned short ctrl; | |
930 | ||
931 | /* Set RIE (Receive Interrupt Enable) bit in SCSCR */ | |
932 | local_irq_save(flags); | |
933 | ctrl = sci_in(port, SCSCR); | |
934 | ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE; | |
935 | sci_out(port, SCSCR, ctrl); | |
936 | local_irq_restore(flags); | |
937 | } | |
938 | ||
939 | static void sci_stop_rx(struct uart_port *port) | |
940 | { | |
941 | unsigned long flags; | |
942 | unsigned short ctrl; | |
943 | ||
944 | /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */ | |
945 | local_irq_save(flags); | |
946 | ctrl = sci_in(port, SCSCR); | |
947 | ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE); | |
948 | sci_out(port, SCSCR, ctrl); | |
949 | local_irq_restore(flags); | |
950 | } | |
951 | ||
952 | static void sci_enable_ms(struct uart_port *port) | |
953 | { | |
954 | /* Nothing here yet .. */ | |
955 | } | |
956 | ||
957 | static void sci_break_ctl(struct uart_port *port, int break_state) | |
958 | { | |
959 | /* Nothing here yet .. */ | |
960 | } | |
961 | ||
962 | static int sci_startup(struct uart_port *port) | |
963 | { | |
964 | struct sci_port *s = &sci_ports[port->line]; | |
965 | ||
966 | #if defined(__H8300S__) | |
967 | h8300_sci_enable(port, sci_enable); | |
968 | #endif | |
969 | ||
970 | sci_request_irq(s); | |
d656901b | 971 | sci_start_tx(port); |
1da177e4 LT |
972 | sci_start_rx(port, 1); |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | static void sci_shutdown(struct uart_port *port) | |
978 | { | |
979 | struct sci_port *s = &sci_ports[port->line]; | |
980 | ||
981 | sci_stop_rx(port); | |
b129a8cc | 982 | sci_stop_tx(port); |
1da177e4 LT |
983 | sci_free_irq(s); |
984 | ||
985 | #if defined(__H8300S__) | |
986 | h8300_sci_enable(port, sci_disable); | |
987 | #endif | |
988 | } | |
989 | ||
990 | static void sci_set_termios(struct uart_port *port, struct termios *termios, | |
991 | struct termios *old) | |
992 | { | |
993 | struct sci_port *s = &sci_ports[port->line]; | |
994 | unsigned int status, baud, smr_val; | |
995 | unsigned long flags; | |
996 | int t; | |
997 | ||
998 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); | |
999 | ||
1000 | spin_lock_irqsave(&port->lock, flags); | |
1001 | ||
1002 | do { | |
1003 | status = sci_in(port, SCxSR); | |
1004 | } while (!(status & SCxSR_TEND(port))); | |
1005 | ||
1006 | sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */ | |
1007 | ||
1008 | #if !defined(SCI_ONLY) | |
1009 | if (port->type == PORT_SCIF) { | |
1010 | sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST); | |
1011 | } | |
1012 | #endif | |
1013 | ||
1014 | smr_val = sci_in(port, SCSMR) & 3; | |
1015 | if ((termios->c_cflag & CSIZE) == CS7) | |
1016 | smr_val |= 0x40; | |
1017 | if (termios->c_cflag & PARENB) | |
1018 | smr_val |= 0x20; | |
1019 | if (termios->c_cflag & PARODD) | |
1020 | smr_val |= 0x30; | |
1021 | if (termios->c_cflag & CSTOPB) | |
1022 | smr_val |= 0x08; | |
1023 | ||
1024 | uart_update_timeout(port, termios->c_cflag, baud); | |
1025 | ||
1026 | sci_out(port, SCSMR, smr_val); | |
1027 | ||
1028 | switch (baud) { | |
b7a76e4b PM |
1029 | case 0: |
1030 | t = -1; | |
1031 | break; | |
1032 | default: | |
1033 | { | |
1034 | #if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64) | |
1035 | struct clk *clk = clk_get("module_clk"); | |
1036 | t = SCBRR_VALUE(baud, clk_get_rate(clk)); | |
1037 | clk_put(clk); | |
1038 | #else | |
1039 | t = SCBRR_VALUE(baud); | |
1040 | #endif | |
1041 | } | |
1042 | break; | |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | if (t > 0) { | |
1046 | if(t >= 256) { | |
1047 | sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1); | |
1048 | t >>= 2; | |
1049 | } else { | |
1050 | sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3); | |
1051 | } | |
1052 | sci_out(port, SCBRR, t); | |
1053 | udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ | |
1054 | } | |
1055 | ||
b7a76e4b PM |
1056 | if (likely(s->init_pins)) |
1057 | s->init_pins(port, termios->c_cflag); | |
1058 | ||
1da177e4 LT |
1059 | sci_out(port, SCSCR, SCSCR_INIT(port)); |
1060 | ||
1061 | if ((termios->c_cflag & CREAD) != 0) | |
1062 | sci_start_rx(port,0); | |
1063 | ||
1064 | spin_unlock_irqrestore(&port->lock, flags); | |
1065 | } | |
1066 | ||
1067 | static const char *sci_type(struct uart_port *port) | |
1068 | { | |
1069 | switch (port->type) { | |
1070 | case PORT_SCI: return "sci"; | |
1071 | case PORT_SCIF: return "scif"; | |
1072 | case PORT_IRDA: return "irda"; | |
1073 | } | |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | static void sci_release_port(struct uart_port *port) | |
1079 | { | |
1080 | /* Nothing here yet .. */ | |
1081 | } | |
1082 | ||
1083 | static int sci_request_port(struct uart_port *port) | |
1084 | { | |
1085 | /* Nothing here yet .. */ | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | static void sci_config_port(struct uart_port *port, int flags) | |
1090 | { | |
1091 | struct sci_port *s = &sci_ports[port->line]; | |
1092 | ||
1093 | port->type = s->type; | |
1094 | ||
1095 | #if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103) | |
1096 | if (port->mapbase == 0) | |
1097 | port->mapbase = onchip_remap(SCIF_ADDR_SH5, 1024, "SCIF"); | |
1098 | ||
1099 | port->membase = (void *)port->mapbase; | |
1100 | #endif | |
1101 | } | |
1102 | ||
1103 | static int sci_verify_port(struct uart_port *port, struct serial_struct *ser) | |
1104 | { | |
1105 | struct sci_port *s = &sci_ports[port->line]; | |
1106 | ||
1107 | if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > NR_IRQS) | |
1108 | return -EINVAL; | |
1109 | if (ser->baud_base < 2400) | |
1110 | /* No paper tape reader for Mitch.. */ | |
1111 | return -EINVAL; | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static struct uart_ops sci_uart_ops = { | |
1117 | .tx_empty = sci_tx_empty, | |
1118 | .set_mctrl = sci_set_mctrl, | |
1119 | .get_mctrl = sci_get_mctrl, | |
1120 | .start_tx = sci_start_tx, | |
1121 | .stop_tx = sci_stop_tx, | |
1122 | .stop_rx = sci_stop_rx, | |
1123 | .enable_ms = sci_enable_ms, | |
1124 | .break_ctl = sci_break_ctl, | |
1125 | .startup = sci_startup, | |
1126 | .shutdown = sci_shutdown, | |
1127 | .set_termios = sci_set_termios, | |
1128 | .type = sci_type, | |
1129 | .release_port = sci_release_port, | |
1130 | .request_port = sci_request_port, | |
1131 | .config_port = sci_config_port, | |
1132 | .verify_port = sci_verify_port, | |
1133 | }; | |
1134 | ||
b7a76e4b | 1135 | static struct sci_port sci_ports[] = { |
1da177e4 LT |
1136 | #if defined(CONFIG_CPU_SUBTYPE_SH7708) |
1137 | { | |
1138 | .port = { | |
1139 | .membase = (void *)0xfffffe80, | |
1140 | .mapbase = 0xfffffe80, | |
ce8337cb | 1141 | .iotype = UPIO_MEM, |
1da177e4 LT |
1142 | .irq = 25, |
1143 | .ops = &sci_uart_ops, | |
ce8337cb | 1144 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1145 | .line = 0, |
1146 | }, | |
1147 | .type = PORT_SCI, | |
1148 | .irqs = SCI_IRQS, | |
1da177e4 LT |
1149 | }, |
1150 | #elif defined(CONFIG_CPU_SUBTYPE_SH7705) | |
1151 | { | |
1152 | .port = { | |
1153 | .membase = (void *)SCIF0, | |
1154 | .mapbase = SCIF0, | |
ce8337cb | 1155 | .iotype = UPIO_MEM, |
1da177e4 LT |
1156 | .irq = 55, |
1157 | .ops = &sci_uart_ops, | |
ce8337cb | 1158 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1159 | .line = 0, |
1160 | }, | |
1161 | .type = PORT_SCIF, | |
1162 | .irqs = SH3_IRDA_IRQS, | |
1163 | .init_pins = sci_init_pins_scif, | |
1164 | }, | |
1165 | { | |
1166 | .port = { | |
1167 | .membase = (void *)SCIF2, | |
1168 | .mapbase = SCIF2, | |
ce8337cb | 1169 | .iotype = UPIO_MEM, |
1da177e4 LT |
1170 | .irq = 59, |
1171 | .ops = &sci_uart_ops, | |
ce8337cb | 1172 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1173 | .line = 1, |
1174 | }, | |
1175 | .type = PORT_SCIF, | |
1176 | .irqs = SH3_SCIF_IRQS, | |
1177 | .init_pins = sci_init_pins_scif, | |
1178 | } | |
1179 | #elif defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) | |
1180 | { | |
1181 | .port = { | |
1182 | .membase = (void *)0xfffffe80, | |
1183 | .mapbase = 0xfffffe80, | |
ce8337cb | 1184 | .iotype = UPIO_MEM, |
1da177e4 LT |
1185 | .irq = 25, |
1186 | .ops = &sci_uart_ops, | |
ce8337cb | 1187 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1188 | .line = 0, |
1189 | }, | |
1190 | .type = PORT_SCI, | |
1191 | .irqs = SCI_IRQS, | |
1da177e4 LT |
1192 | }, |
1193 | { | |
1194 | .port = { | |
1195 | .membase = (void *)0xa4000150, | |
1196 | .mapbase = 0xa4000150, | |
ce8337cb | 1197 | .iotype = UPIO_MEM, |
1da177e4 LT |
1198 | .irq = 59, |
1199 | .ops = &sci_uart_ops, | |
ce8337cb | 1200 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1201 | .line = 1, |
1202 | }, | |
1203 | .type = PORT_SCIF, | |
1204 | .irqs = SH3_SCIF_IRQS, | |
1205 | .init_pins = sci_init_pins_scif, | |
1206 | }, | |
1207 | { | |
1208 | .port = { | |
1209 | .membase = (void *)0xa4000140, | |
1210 | .mapbase = 0xa4000140, | |
ce8337cb | 1211 | .iotype = UPIO_MEM, |
1da177e4 LT |
1212 | .irq = 55, |
1213 | .ops = &sci_uart_ops, | |
ce8337cb | 1214 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1215 | .line = 2, |
1216 | }, | |
1217 | .type = PORT_IRDA, | |
1218 | .irqs = SH3_IRDA_IRQS, | |
1219 | .init_pins = sci_init_pins_irda, | |
1220 | } | |
1221 | #elif defined(CONFIG_CPU_SUBTYPE_SH7300) | |
1222 | { | |
1223 | .port = { | |
1224 | .membase = (void *)0xA4430000, | |
1225 | .mapbase = 0xA4430000, | |
ce8337cb | 1226 | .iotype = UPIO_MEM, |
1da177e4 LT |
1227 | .irq = 25, |
1228 | .ops = &sci_uart_ops, | |
ce8337cb | 1229 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1230 | .line = 0, |
1231 | }, | |
1232 | .type = PORT_SCIF, | |
1233 | .irqs = SH7300_SCIF0_IRQS, | |
1234 | .init_pins = sci_init_pins_scif, | |
1235 | }, | |
1236 | #elif defined(CONFIG_CPU_SUBTYPE_SH73180) | |
1237 | { | |
1238 | .port = { | |
1239 | .membase = (void *)0xffe00000, | |
1240 | .mapbase = 0xffe00000, | |
ce8337cb | 1241 | .iotype = UPIO_MEM, |
1da177e4 LT |
1242 | .irq = 25, |
1243 | .ops = &sci_uart_ops, | |
ce8337cb | 1244 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1245 | .line = 0, |
1246 | }, | |
1247 | .type = PORT_SCIF, | |
1248 | .irqs = SH73180_SCIF_IRQS, | |
1249 | .init_pins = sci_init_pins_scif, | |
1250 | }, | |
b7a76e4b | 1251 | #elif defined(CONFIG_CPU_SUBTYPE_SH4_202) |
1da177e4 LT |
1252 | { |
1253 | .port = { | |
1254 | .membase = (void *)0xffe80000, | |
1255 | .mapbase = 0xffe80000, | |
ce8337cb | 1256 | .iotype = UPIO_MEM, |
1da177e4 LT |
1257 | .irq = 43, |
1258 | .ops = &sci_uart_ops, | |
ce8337cb | 1259 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1260 | .line = 0, |
1261 | }, | |
1262 | .type = PORT_SCIF, | |
1263 | .irqs = SH4_SCIF_IRQS, | |
1264 | .init_pins = sci_init_pins_scif, | |
1265 | }, | |
1266 | #elif defined(CONFIG_CPU_SUBTYPE_SH7750) || defined(CONFIG_CPU_SUBTYPE_SH7751) | |
1267 | { | |
1268 | .port = { | |
1269 | .membase = (void *)0xffe00000, | |
1270 | .mapbase = 0xffe00000, | |
ce8337cb | 1271 | .iotype = UPIO_MEM, |
1da177e4 LT |
1272 | .irq = 25, |
1273 | .ops = &sci_uart_ops, | |
ce8337cb | 1274 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1275 | .line = 0, |
1276 | }, | |
1277 | .type = PORT_SCI, | |
1278 | .irqs = SCI_IRQS, | |
1da177e4 LT |
1279 | }, |
1280 | { | |
1281 | .port = { | |
1282 | .membase = (void *)0xffe80000, | |
1283 | .mapbase = 0xffe80000, | |
ce8337cb | 1284 | .iotype = UPIO_MEM, |
1da177e4 LT |
1285 | .irq = 43, |
1286 | .ops = &sci_uart_ops, | |
ce8337cb | 1287 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1288 | .line = 1, |
1289 | }, | |
1290 | .type = PORT_SCIF, | |
1291 | .irqs = SH4_SCIF_IRQS, | |
1292 | .init_pins = sci_init_pins_scif, | |
1293 | }, | |
1294 | #elif defined(CONFIG_CPU_SUBTYPE_SH7760) | |
1295 | { | |
1296 | .port = { | |
1297 | .membase = (void *)0xfe600000, | |
1298 | .mapbase = 0xfe600000, | |
ce8337cb | 1299 | .iotype = UPIO_MEM, |
1da177e4 LT |
1300 | .irq = 55, |
1301 | .ops = &sci_uart_ops, | |
ce8337cb | 1302 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1303 | .line = 0, |
1304 | }, | |
1305 | .type = PORT_SCIF, | |
1306 | .irqs = SH7760_SCIF0_IRQS, | |
1307 | .init_pins = sci_init_pins_scif, | |
1308 | }, | |
1309 | { | |
1310 | .port = { | |
1311 | .membase = (void *)0xfe610000, | |
1312 | .mapbase = 0xfe610000, | |
ce8337cb | 1313 | .iotype = UPIO_MEM, |
1da177e4 LT |
1314 | .irq = 75, |
1315 | .ops = &sci_uart_ops, | |
ce8337cb | 1316 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1317 | .line = 1, |
1318 | }, | |
1319 | .type = PORT_SCIF, | |
1320 | .irqs = SH7760_SCIF1_IRQS, | |
1321 | .init_pins = sci_init_pins_scif, | |
1322 | }, | |
1323 | { | |
1324 | .port = { | |
1325 | .membase = (void *)0xfe620000, | |
1326 | .mapbase = 0xfe620000, | |
ce8337cb | 1327 | .iotype = UPIO_MEM, |
1da177e4 LT |
1328 | .irq = 79, |
1329 | .ops = &sci_uart_ops, | |
ce8337cb | 1330 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1331 | .line = 2, |
1332 | }, | |
1333 | .type = PORT_SCIF, | |
1334 | .irqs = SH7760_SCIF2_IRQS, | |
1335 | .init_pins = sci_init_pins_scif, | |
1336 | }, | |
1da177e4 LT |
1337 | #elif defined(CONFIG_CPU_SUBTYPE_ST40STB1) |
1338 | { | |
1339 | .port = { | |
1340 | .membase = (void *)0xffe00000, | |
1341 | .mapbase = 0xffe00000, | |
ce8337cb | 1342 | .iotype = UPIO_MEM, |
1da177e4 LT |
1343 | .irq = 26, |
1344 | .ops = &sci_uart_ops, | |
ce8337cb | 1345 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1346 | .line = 0, |
1347 | }, | |
1348 | .type = PORT_SCIF, | |
1349 | .irqs = STB1_SCIF1_IRQS, | |
1350 | .init_pins = sci_init_pins_scif, | |
1351 | }, | |
1352 | { | |
1353 | .port = { | |
1354 | .membase = (void *)0xffe80000, | |
1355 | .mapbase = 0xffe80000, | |
ce8337cb | 1356 | .iotype = UPIO_MEM, |
1da177e4 LT |
1357 | .irq = 43, |
1358 | .ops = &sci_uart_ops, | |
ce8337cb | 1359 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1360 | .line = 1, |
1361 | }, | |
1362 | .type = PORT_SCIF, | |
1363 | .irqs = SH4_SCIF_IRQS, | |
1364 | .init_pins = sci_init_pins_scif, | |
1365 | }, | |
1366 | #elif defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103) | |
1367 | { | |
1368 | .port = { | |
ce8337cb | 1369 | .iotype = UPIO_MEM, |
1da177e4 LT |
1370 | .irq = 42, |
1371 | .ops = &sci_uart_ops, | |
ce8337cb | 1372 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1373 | .line = 0, |
1374 | }, | |
1375 | .type = PORT_SCIF, | |
1376 | .irqs = SH5_SCIF_IRQS, | |
1377 | .init_pins = sci_init_pins_scif, | |
1378 | }, | |
1379 | #elif defined(CONFIG_H83007) || defined(CONFIG_H83068) | |
1380 | { | |
1381 | .port = { | |
1382 | .membase = (void *)0x00ffffb0, | |
1383 | .mapbase = 0x00ffffb0, | |
ce8337cb | 1384 | .iotype = UPIO_MEM, |
1da177e4 LT |
1385 | .irq = 54, |
1386 | .ops = &sci_uart_ops, | |
ce8337cb | 1387 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1388 | .line = 0, |
1389 | }, | |
1390 | .type = PORT_SCI, | |
1391 | .irqs = H8300H_SCI_IRQS0, | |
1392 | .init_pins = sci_init_pins_sci, | |
1393 | }, | |
1394 | { | |
1395 | .port = { | |
1396 | .membase = (void *)0x00ffffb8, | |
1397 | .mapbase = 0x00ffffb8, | |
ce8337cb | 1398 | .iotype = UPIO_MEM, |
1da177e4 LT |
1399 | .irq = 58, |
1400 | .ops = &sci_uart_ops, | |
ce8337cb | 1401 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1402 | .line = 1, |
1403 | }, | |
1404 | .type = PORT_SCI, | |
1405 | .irqs = H8300H_SCI_IRQS1, | |
1406 | .init_pins = sci_init_pins_sci, | |
1407 | }, | |
1408 | { | |
1409 | .port = { | |
1410 | .membase = (void *)0x00ffffc0, | |
1411 | .mapbase = 0x00ffffc0, | |
ce8337cb | 1412 | .iotype = UPIO_MEM, |
1da177e4 LT |
1413 | .irq = 62, |
1414 | .ops = &sci_uart_ops, | |
ce8337cb | 1415 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1416 | .line = 2, |
1417 | }, | |
1418 | .type = PORT_SCI, | |
1419 | .irqs = H8300H_SCI_IRQS2, | |
1420 | .init_pins = sci_init_pins_sci, | |
1421 | }, | |
1422 | #elif defined(CONFIG_H8S2678) | |
1423 | { | |
1424 | .port = { | |
1425 | .membase = (void *)0x00ffff78, | |
1426 | .mapbase = 0x00ffff78, | |
ce8337cb | 1427 | .iotype = UPIO_MEM, |
1da177e4 LT |
1428 | .irq = 90, |
1429 | .ops = &sci_uart_ops, | |
ce8337cb | 1430 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1431 | .line = 0, |
1432 | }, | |
1433 | .type = PORT_SCI, | |
1434 | .irqs = H8S_SCI_IRQS0, | |
1435 | .init_pins = sci_init_pins_sci, | |
1436 | }, | |
1437 | { | |
1438 | .port = { | |
1439 | .membase = (void *)0x00ffff80, | |
1440 | .mapbase = 0x00ffff80, | |
ce8337cb | 1441 | .iotype = UPIO_MEM, |
1da177e4 LT |
1442 | .irq = 94, |
1443 | .ops = &sci_uart_ops, | |
ce8337cb | 1444 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1445 | .line = 1, |
1446 | }, | |
1447 | .type = PORT_SCI, | |
1448 | .irqs = H8S_SCI_IRQS1, | |
1449 | .init_pins = sci_init_pins_sci, | |
1450 | }, | |
1451 | { | |
1452 | .port = { | |
1453 | .membase = (void *)0x00ffff88, | |
1454 | .mapbase = 0x00ffff88, | |
ce8337cb | 1455 | .iotype = UPIO_MEM, |
1da177e4 LT |
1456 | .irq = 98, |
1457 | .ops = &sci_uart_ops, | |
ce8337cb | 1458 | .flags = UPF_BOOT_AUTOCONF, |
1da177e4 LT |
1459 | .line = 2, |
1460 | }, | |
1461 | .type = PORT_SCI, | |
1462 | .irqs = H8S_SCI_IRQS2, | |
1463 | .init_pins = sci_init_pins_sci, | |
1464 | }, | |
b7a76e4b PM |
1465 | #elif defined(CONFIG_CPU_SUBTYPE_SH7770) |
1466 | { | |
1467 | .port = { | |
1468 | .membase = (void *)0xff923000, | |
1469 | .mapbase = 0xff923000, | |
9b4a1617 | 1470 | .iotype = UPIO_MEM, |
b7a76e4b PM |
1471 | .irq = 61, |
1472 | .ops = &sci_uart_ops, | |
59a675b2 | 1473 | .flags = UPF_BOOT_AUTOCONF, |
b7a76e4b PM |
1474 | .line = 0, |
1475 | }, | |
1476 | .type = PORT_SCIF, | |
1477 | .irqs = SH7770_SCIF0_IRQS, | |
1478 | .init_pins = sci_init_pins_scif, | |
1479 | }, | |
1480 | { | |
1481 | .port = { | |
1482 | .membase = (void *)0xff924000, | |
1483 | .mapbase = 0xff924000, | |
9b4a1617 | 1484 | .iotype = UPIO_MEM, |
b7a76e4b PM |
1485 | .irq = 62, |
1486 | .ops = &sci_uart_ops, | |
59a675b2 | 1487 | .flags = UPF_BOOT_AUTOCONF, |
b7a76e4b PM |
1488 | .line = 1, |
1489 | }, | |
1490 | .type = PORT_SCIF, | |
1491 | .irqs = SH7770_SCIF1_IRQS, | |
1492 | .init_pins = sci_init_pins_scif, | |
1493 | }, | |
1494 | { | |
1495 | .port = { | |
1496 | .membase = (void *)0xff925000, | |
1497 | .mapbase = 0xff925000, | |
9b4a1617 | 1498 | .iotype = UPIO_MEM, |
b7a76e4b PM |
1499 | .irq = 63, |
1500 | .ops = &sci_uart_ops, | |
59a675b2 | 1501 | .flags = UPF_BOOT_AUTOCONF, |
b7a76e4b PM |
1502 | .line = 2, |
1503 | }, | |
1504 | .type = PORT_SCIF, | |
1505 | .irqs = SH7770_SCIF2_IRQS, | |
1506 | .init_pins = sci_init_pins_scif, | |
1507 | }, | |
1508 | #elif defined(CONFIG_CPU_SUBTYPE_SH7780) | |
1509 | { | |
1510 | .port = { | |
1511 | .membase = (void *)0xffe00000, | |
1512 | .mapbase = 0xffe00000, | |
9b4a1617 | 1513 | .iotype = UPIO_MEM, |
b7a76e4b PM |
1514 | .irq = 43, |
1515 | .ops = &sci_uart_ops, | |
59a675b2 | 1516 | .flags = UPF_BOOT_AUTOCONF, |
b7a76e4b PM |
1517 | .line = 0, |
1518 | }, | |
1519 | .type = PORT_SCIF, | |
1520 | .irqs = SH7780_SCIF0_IRQS, | |
1521 | .init_pins = sci_init_pins_scif, | |
1522 | }, | |
1523 | { | |
1524 | .port = { | |
1525 | .membase = (void *)0xffe10000, | |
1526 | .mapbase = 0xffe10000, | |
9b4a1617 | 1527 | .iotype = UPIO_MEM, |
b7a76e4b PM |
1528 | .irq = 79, |
1529 | .ops = &sci_uart_ops, | |
59a675b2 | 1530 | .flags = UPF_BOOT_AUTOCONF, |
b7a76e4b PM |
1531 | .line = 1, |
1532 | }, | |
1533 | .type = PORT_SCIF, | |
1534 | .irqs = SH7780_SCIF1_IRQS, | |
1535 | .init_pins = sci_init_pins_scif, | |
1536 | }, | |
1da177e4 LT |
1537 | #else |
1538 | #error "CPU subtype not defined" | |
1539 | #endif | |
1540 | }; | |
1541 | ||
1542 | #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE | |
1543 | /* | |
1544 | * Print a string to the serial port trying not to disturb | |
1545 | * any possible real use of the port... | |
1546 | */ | |
1547 | static void serial_console_write(struct console *co, const char *s, | |
1548 | unsigned count) | |
1549 | { | |
1550 | put_string(serial_console_port, s, count); | |
1551 | } | |
1552 | ||
1553 | static int __init serial_console_setup(struct console *co, char *options) | |
1554 | { | |
1555 | struct uart_port *port; | |
1556 | int baud = 115200; | |
1557 | int bits = 8; | |
1558 | int parity = 'n'; | |
1559 | int flow = 'n'; | |
1560 | int ret; | |
1561 | ||
1da177e4 LT |
1562 | serial_console_port = &sci_ports[co->index]; |
1563 | port = &serial_console_port->port; | |
1564 | port->type = serial_console_port->type; | |
1565 | ||
1566 | #ifdef CONFIG_SUPERH64 | |
1567 | /* This is especially needed on sh64 to remap the SCIF */ | |
1568 | sci_config_port(port, 0); | |
1569 | #endif | |
1570 | ||
1571 | /* | |
1572 | * We need to set the initial uartclk here, since otherwise it will | |
1573 | * only ever be setup at sci_init() time. | |
1574 | */ | |
b7a76e4b | 1575 | #if defined(__H8300H__) || defined(__H8300S__) |
1da177e4 | 1576 | port->uartclk = CONFIG_CPU_CLOCK; |
b7a76e4b | 1577 | |
1da177e4 LT |
1578 | #if defined(__H8300S__) |
1579 | h8300_sci_enable(port, sci_enable); | |
b7a76e4b PM |
1580 | #endif |
1581 | #elif defined(CONFIG_SUPERH64) | |
1582 | port->uartclk = current_cpu_info.module_clock * 16; | |
1583 | #else | |
1584 | { | |
1585 | struct clk *clk = clk_get("module_clk"); | |
1586 | port->uartclk = clk_get_rate(clk) * 16; | |
1587 | clk_put(clk); | |
1588 | } | |
1da177e4 LT |
1589 | #endif |
1590 | if (options) | |
1591 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
1592 | ||
1593 | ret = uart_set_options(port, co, baud, parity, bits, flow); | |
1594 | #if defined(__H8300H__) || defined(__H8300S__) | |
1595 | /* disable rx interrupt */ | |
1596 | if (ret == 0) | |
1597 | sci_stop_rx(port); | |
1598 | #endif | |
1599 | return ret; | |
1600 | } | |
1601 | ||
1602 | static struct console serial_console = { | |
1603 | .name = "ttySC", | |
1604 | .device = uart_console_device, | |
1605 | .write = serial_console_write, | |
1606 | .setup = serial_console_setup, | |
1607 | .flags = CON_PRINTBUFFER, | |
1608 | .index = -1, | |
1609 | .data = &sci_uart_driver, | |
1610 | }; | |
1611 | ||
1612 | static int __init sci_console_init(void) | |
1613 | { | |
1614 | register_console(&serial_console); | |
1615 | return 0; | |
1616 | } | |
1617 | ||
1618 | console_initcall(sci_console_init); | |
1619 | #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ | |
1620 | ||
1621 | #ifdef CONFIG_SH_KGDB | |
1622 | /* | |
1623 | * FIXME: Most of this can go away.. at the moment, we rely on | |
1624 | * arch/sh/kernel/setup.c to do the command line parsing for kgdb, though | |
1625 | * most of that can easily be done here instead. | |
1626 | * | |
1627 | * For the time being, just accept the values that were parsed earlier.. | |
1628 | */ | |
1629 | static void __init kgdb_console_get_options(struct uart_port *port, int *baud, | |
1630 | int *parity, int *bits) | |
1631 | { | |
1632 | *baud = kgdb_baud; | |
1633 | *parity = tolower(kgdb_parity); | |
1634 | *bits = kgdb_bits - '0'; | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * The naming here is somewhat misleading, since kgdb_console_setup() takes | |
1639 | * care of the early-on initialization for kgdb, regardless of whether we | |
1640 | * actually use kgdb as a console or not. | |
1641 | * | |
1642 | * On the plus side, this lets us kill off the old kgdb_sci_setup() nonsense. | |
1643 | */ | |
1644 | int __init kgdb_console_setup(struct console *co, char *options) | |
1645 | { | |
1646 | struct uart_port *port = &sci_ports[kgdb_portnum].port; | |
1647 | int baud = 38400; | |
1648 | int bits = 8; | |
1649 | int parity = 'n'; | |
1650 | int flow = 'n'; | |
1651 | ||
b7a76e4b | 1652 | if (co->index != kgdb_portnum) |
1da177e4 LT |
1653 | co->index = kgdb_portnum; |
1654 | ||
1655 | if (options) | |
1656 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
1657 | else | |
1658 | kgdb_console_get_options(port, &baud, &parity, &bits); | |
1659 | ||
1660 | kgdb_getchar = kgdb_sci_getchar; | |
1661 | kgdb_putchar = kgdb_sci_putchar; | |
1662 | ||
1663 | return uart_set_options(port, co, baud, parity, bits, flow); | |
1664 | } | |
1665 | #endif /* CONFIG_SH_KGDB */ | |
1666 | ||
1667 | #ifdef CONFIG_SH_KGDB_CONSOLE | |
1668 | static struct console kgdb_console = { | |
1669 | .name = "ttySC", | |
1670 | .write = kgdb_console_write, | |
1671 | .setup = kgdb_console_setup, | |
1672 | .flags = CON_PRINTBUFFER | CON_ENABLED, | |
1673 | .index = -1, | |
1674 | .data = &sci_uart_driver, | |
1675 | }; | |
1676 | ||
1677 | /* Register the KGDB console so we get messages (d'oh!) */ | |
1678 | static int __init kgdb_console_init(void) | |
1679 | { | |
1680 | register_console(&kgdb_console); | |
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | console_initcall(kgdb_console_init); | |
1685 | #endif /* CONFIG_SH_KGDB_CONSOLE */ | |
1686 | ||
1687 | #if defined(CONFIG_SH_KGDB_CONSOLE) | |
1688 | #define SCI_CONSOLE &kgdb_console | |
1689 | #elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE) | |
1690 | #define SCI_CONSOLE &serial_console | |
1691 | #else | |
b7a76e4b | 1692 | #define SCI_CONSOLE 0 |
1da177e4 LT |
1693 | #endif |
1694 | ||
1695 | static char banner[] __initdata = | |
1696 | KERN_INFO "SuperH SCI(F) driver initialized\n"; | |
1697 | ||
1698 | static struct uart_driver sci_uart_driver = { | |
1699 | .owner = THIS_MODULE, | |
1700 | .driver_name = "sci", | |
1da177e4 LT |
1701 | .dev_name = "ttySC", |
1702 | .major = SCI_MAJOR, | |
1703 | .minor = SCI_MINOR_START, | |
1da177e4 LT |
1704 | .cons = SCI_CONSOLE, |
1705 | }; | |
1706 | ||
1707 | static int __init sci_init(void) | |
1708 | { | |
1709 | int chan, ret; | |
1710 | ||
1711 | printk("%s", banner); | |
1712 | ||
b7a76e4b PM |
1713 | sci_uart_driver.nr = ARRAY_SIZE(sci_ports); |
1714 | ||
1da177e4 LT |
1715 | ret = uart_register_driver(&sci_uart_driver); |
1716 | if (ret == 0) { | |
1717 | for (chan = 0; chan < SCI_NPORTS; chan++) { | |
1718 | struct sci_port *sciport = &sci_ports[chan]; | |
1719 | ||
b7a76e4b | 1720 | #if defined(__H8300H__) || defined(__H8300S__) |
1da177e4 | 1721 | sciport->port.uartclk = CONFIG_CPU_CLOCK; |
b7a76e4b PM |
1722 | #elif defined(CONFIG_SUPERH64) |
1723 | sciport->port.uartclk = current_cpu_info.module_clock * 16; | |
1724 | #else | |
1725 | struct clk *clk = clk_get("module_clk"); | |
1726 | sciport->port.uartclk = clk_get_rate(clk) * 16; | |
1727 | clk_put(clk); | |
1da177e4 LT |
1728 | #endif |
1729 | uart_add_one_port(&sci_uart_driver, &sciport->port); | |
1730 | sciport->break_timer.data = (unsigned long)sciport; | |
1731 | sciport->break_timer.function = sci_break_timer; | |
1732 | init_timer(&sciport->break_timer); | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | #ifdef CONFIG_CPU_FREQ | |
1737 | cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER); | |
1738 | printk("sci: CPU frequency notifier registered\n"); | |
1739 | #endif | |
1740 | ||
1741 | #ifdef CONFIG_SH_STANDARD_BIOS | |
1742 | sh_bios_gdb_detach(); | |
1743 | #endif | |
1744 | ||
1745 | return ret; | |
1746 | } | |
1747 | ||
1748 | static void __exit sci_exit(void) | |
1749 | { | |
1750 | int chan; | |
1751 | ||
1752 | for (chan = 0; chan < SCI_NPORTS; chan++) | |
1753 | uart_remove_one_port(&sci_uart_driver, &sci_ports[chan].port); | |
1754 | ||
1755 | uart_unregister_driver(&sci_uart_driver); | |
1756 | } | |
1757 | ||
1758 | module_init(sci_init); | |
1759 | module_exit(sci_exit); | |
1760 |