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1da177e4 LT |
1 | /* |
2 | * mcfserial.c -- serial driver for ColdFire internal UARTS. | |
3 | * | |
4 | * Copyright (C) 1999-2003 Greg Ungerer <gerg@snapgear.com> | |
5 | * Copyright (c) 2000-2001 Lineo, Inc. <www.lineo.com> | |
6 | * Copyright (C) 2001-2002 SnapGear Inc. <www.snapgear.com> | |
7 | * | |
8 | * Based on code from 68332serial.c which was: | |
9 | * | |
10 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
11 | * Copyright (C) 1998 TSHG | |
12 | * Copyright (c) 1999 Rt-Control Inc. <jeff@uclinux.org> | |
13 | * | |
14 | * Changes: | |
15 | * 08/07/2003 Daniele Bellucci <bellucda@tiscali.it> | |
16 | * some cleanups in mcfrs_write. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/signal.h> | |
23 | #include <linux/sched.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/wait.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_flip.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/fcntl.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/serial.h> | |
34 | #include <linux/serialP.h> | |
35 | #include <linux/console.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/bitops.h> | |
38 | #include <linux/delay.h> | |
39 | ||
40 | #include <asm/io.h> | |
41 | #include <asm/irq.h> | |
42 | #include <asm/system.h> | |
1da177e4 LT |
43 | #include <asm/semaphore.h> |
44 | #include <asm/delay.h> | |
45 | #include <asm/coldfire.h> | |
46 | #include <asm/mcfsim.h> | |
47 | #include <asm/mcfuart.h> | |
48 | #include <asm/nettel.h> | |
49 | #include <asm/uaccess.h> | |
50 | #include "mcfserial.h" | |
51 | ||
52 | struct timer_list mcfrs_timer_struct; | |
53 | ||
54 | /* | |
55 | * Default console baud rate, we use this as the default | |
56 | * for all ports so init can just open /dev/console and | |
57 | * keep going. Perhaps one day the cflag settings for the | |
58 | * console can be used instead. | |
59 | */ | |
1da177e4 | 60 | #if defined(CONFIG_HW_FEITH) |
b0433b99 GU |
61 | #define CONSOLE_BAUD_RATE 38400 |
62 | #define DEFAULT_CBAUD B38400 | |
a8b8d57c GU |
63 | #elif defined(CONFIG_MOD5272) || defined(CONFIG_M5208EVB) || \ |
64 | defined(CONFIG_M5329EVB) || defined(CONFIG_GILBARCO) | |
b0433b99 GU |
65 | #define CONSOLE_BAUD_RATE 115200 |
66 | #define DEFAULT_CBAUD B115200 | |
a9cdffb1 | 67 | #elif defined(CONFIG_ARNEWSH) || defined(CONFIG_FREESCALE) || \ |
76aa698f | 68 | defined(CONFIG_senTec) || defined(CONFIG_SNEHA) || defined(CONFIG_AVNET) |
a9cdffb1 GU |
69 | #define CONSOLE_BAUD_RATE 19200 |
70 | #define DEFAULT_CBAUD B19200 | |
1da177e4 LT |
71 | #endif |
72 | ||
73 | #ifndef CONSOLE_BAUD_RATE | |
74 | #define CONSOLE_BAUD_RATE 9600 | |
75 | #define DEFAULT_CBAUD B9600 | |
76 | #endif | |
77 | ||
78 | int mcfrs_console_inited = 0; | |
79 | int mcfrs_console_port = -1; | |
80 | int mcfrs_console_baud = CONSOLE_BAUD_RATE; | |
81 | int mcfrs_console_cbaud = DEFAULT_CBAUD; | |
82 | ||
83 | /* | |
84 | * Driver data structures. | |
85 | */ | |
86 | static struct tty_driver *mcfrs_serial_driver; | |
87 | ||
88 | /* number of characters left in xmit buffer before we ask for more */ | |
89 | #define WAKEUP_CHARS 256 | |
90 | ||
91 | /* Debugging... | |
92 | */ | |
93 | #undef SERIAL_DEBUG_OPEN | |
94 | #undef SERIAL_DEBUG_FLOW | |
95 | ||
7f04d62b | 96 | #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
76aa698f | 97 | defined(CONFIG_M520x) || defined(CONFIG_M532x) |
1da177e4 LT |
98 | #define IRQBASE (MCFINT_VECBASE+MCFINT_UART0) |
99 | #else | |
100 | #define IRQBASE 73 | |
101 | #endif | |
102 | ||
103 | /* | |
104 | * Configuration table, UARTs to look for at startup. | |
105 | */ | |
106 | static struct mcf_serial mcfrs_table[] = { | |
107 | { /* ttyS0 */ | |
108 | .magic = 0, | |
109 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE1), | |
110 | .irq = IRQBASE, | |
111 | .flags = ASYNC_BOOT_AUTOCONF, | |
112 | }, | |
a8b8d57c | 113 | #ifdef MCFUART_BASE2 |
1da177e4 LT |
114 | { /* ttyS1 */ |
115 | .magic = 0, | |
116 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE2), | |
117 | .irq = IRQBASE+1, | |
118 | .flags = ASYNC_BOOT_AUTOCONF, | |
119 | }, | |
a8b8d57c GU |
120 | #endif |
121 | #ifdef MCFUART_BASE3 | |
122 | { /* ttyS2 */ | |
123 | .magic = 0, | |
124 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE3), | |
125 | .irq = IRQBASE+2, | |
126 | .flags = ASYNC_BOOT_AUTOCONF, | |
127 | }, | |
128 | #endif | |
129 | #ifdef MCFUART_BASE4 | |
130 | { /* ttyS3 */ | |
131 | .magic = 0, | |
132 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE4), | |
133 | .irq = IRQBASE+3, | |
134 | .flags = ASYNC_BOOT_AUTOCONF, | |
135 | }, | |
136 | #endif | |
1da177e4 LT |
137 | }; |
138 | ||
139 | ||
140 | #define NR_PORTS (sizeof(mcfrs_table) / sizeof(struct mcf_serial)) | |
141 | ||
142 | /* | |
143 | * This is used to figure out the divisor speeds and the timeouts. | |
144 | */ | |
145 | static int mcfrs_baud_table[] = { | |
146 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
147 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 | |
148 | }; | |
149 | #define MCFRS_BAUD_TABLE_SIZE \ | |
150 | (sizeof(mcfrs_baud_table)/sizeof(mcfrs_baud_table[0])) | |
151 | ||
152 | ||
153 | #ifdef CONFIG_MAGIC_SYSRQ | |
154 | /* | |
155 | * Magic system request keys. Used for debugging... | |
156 | */ | |
157 | extern int magic_sysrq_key(int ch); | |
158 | #endif | |
159 | ||
160 | ||
161 | /* | |
162 | * Forware declarations... | |
163 | */ | |
164 | static void mcfrs_change_speed(struct mcf_serial *info); | |
165 | static void mcfrs_wait_until_sent(struct tty_struct *tty, int timeout); | |
166 | ||
167 | ||
168 | static inline int serial_paranoia_check(struct mcf_serial *info, | |
169 | char *name, const char *routine) | |
170 | { | |
171 | #ifdef SERIAL_PARANOIA_CHECK | |
172 | static const char badmagic[] = | |
173 | "MCFRS(warning): bad magic number for serial struct %s in %s\n"; | |
174 | static const char badinfo[] = | |
175 | "MCFRS(warning): null mcf_serial for %s in %s\n"; | |
176 | ||
177 | if (!info) { | |
178 | printk(badinfo, name, routine); | |
179 | return 1; | |
180 | } | |
181 | if (info->magic != SERIAL_MAGIC) { | |
182 | printk(badmagic, name, routine); | |
183 | return 1; | |
184 | } | |
185 | #endif | |
186 | return 0; | |
187 | } | |
188 | ||
189 | /* | |
190 | * Sets or clears DTR and RTS on the requested line. | |
191 | */ | |
192 | static void mcfrs_setsignals(struct mcf_serial *info, int dtr, int rts) | |
193 | { | |
194 | volatile unsigned char *uartp; | |
195 | unsigned long flags; | |
196 | ||
197 | #if 0 | |
198 | printk("%s(%d): mcfrs_setsignals(info=%x,dtr=%d,rts=%d)\n", | |
199 | __FILE__, __LINE__, info, dtr, rts); | |
200 | #endif | |
201 | ||
202 | local_irq_save(flags); | |
203 | if (dtr >= 0) { | |
204 | #ifdef MCFPP_DTR0 | |
205 | if (info->line) | |
206 | mcf_setppdata(MCFPP_DTR1, (dtr ? 0 : MCFPP_DTR1)); | |
207 | else | |
208 | mcf_setppdata(MCFPP_DTR0, (dtr ? 0 : MCFPP_DTR0)); | |
209 | #endif | |
210 | } | |
211 | if (rts >= 0) { | |
212 | uartp = info->addr; | |
213 | if (rts) { | |
214 | info->sigs |= TIOCM_RTS; | |
215 | uartp[MCFUART_UOP1] = MCFUART_UOP_RTS; | |
216 | } else { | |
217 | info->sigs &= ~TIOCM_RTS; | |
218 | uartp[MCFUART_UOP0] = MCFUART_UOP_RTS; | |
219 | } | |
220 | } | |
221 | local_irq_restore(flags); | |
222 | return; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Gets values of serial signals. | |
227 | */ | |
228 | static int mcfrs_getsignals(struct mcf_serial *info) | |
229 | { | |
230 | volatile unsigned char *uartp; | |
231 | unsigned long flags; | |
232 | int sigs; | |
233 | #if defined(CONFIG_NETtel) && defined(CONFIG_M5307) | |
234 | unsigned short ppdata; | |
235 | #endif | |
236 | ||
237 | #if 0 | |
238 | printk("%s(%d): mcfrs_getsignals(info=%x)\n", __FILE__, __LINE__); | |
239 | #endif | |
240 | ||
241 | local_irq_save(flags); | |
242 | uartp = info->addr; | |
243 | sigs = (uartp[MCFUART_UIPR] & MCFUART_UIPR_CTS) ? 0 : TIOCM_CTS; | |
244 | sigs |= (info->sigs & TIOCM_RTS); | |
245 | ||
246 | #ifdef MCFPP_DCD0 | |
247 | { | |
248 | unsigned int ppdata; | |
249 | ppdata = mcf_getppdata(); | |
250 | if (info->line == 0) { | |
251 | sigs |= (ppdata & MCFPP_DCD0) ? 0 : TIOCM_CD; | |
252 | sigs |= (ppdata & MCFPP_DTR0) ? 0 : TIOCM_DTR; | |
253 | } else if (info->line == 1) { | |
254 | sigs |= (ppdata & MCFPP_DCD1) ? 0 : TIOCM_CD; | |
255 | sigs |= (ppdata & MCFPP_DTR1) ? 0 : TIOCM_DTR; | |
256 | } | |
257 | } | |
258 | #endif | |
259 | ||
260 | local_irq_restore(flags); | |
261 | return(sigs); | |
262 | } | |
263 | ||
264 | /* | |
265 | * ------------------------------------------------------------ | |
266 | * mcfrs_stop() and mcfrs_start() | |
267 | * | |
268 | * This routines are called before setting or resetting tty->stopped. | |
269 | * They enable or disable transmitter interrupts, as necessary. | |
270 | * ------------------------------------------------------------ | |
271 | */ | |
272 | static void mcfrs_stop(struct tty_struct *tty) | |
273 | { | |
274 | volatile unsigned char *uartp; | |
275 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
276 | unsigned long flags; | |
277 | ||
278 | if (serial_paranoia_check(info, tty->name, "mcfrs_stop")) | |
279 | return; | |
280 | ||
281 | local_irq_save(flags); | |
282 | uartp = info->addr; | |
283 | info->imr &= ~MCFUART_UIR_TXREADY; | |
284 | uartp[MCFUART_UIMR] = info->imr; | |
285 | local_irq_restore(flags); | |
286 | } | |
287 | ||
288 | static void mcfrs_start(struct tty_struct *tty) | |
289 | { | |
290 | volatile unsigned char *uartp; | |
291 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
292 | unsigned long flags; | |
293 | ||
294 | if (serial_paranoia_check(info, tty->name, "mcfrs_start")) | |
295 | return; | |
296 | ||
297 | local_irq_save(flags); | |
298 | if (info->xmit_cnt && info->xmit_buf) { | |
299 | uartp = info->addr; | |
300 | info->imr |= MCFUART_UIR_TXREADY; | |
301 | uartp[MCFUART_UIMR] = info->imr; | |
302 | } | |
303 | local_irq_restore(flags); | |
304 | } | |
305 | ||
306 | /* | |
307 | * ---------------------------------------------------------------------- | |
308 | * | |
309 | * Here starts the interrupt handling routines. All of the following | |
310 | * subroutines are declared as inline and are folded into | |
311 | * mcfrs_interrupt(). They were separated out for readability's sake. | |
312 | * | |
313 | * Note: mcfrs_interrupt() is a "fast" interrupt, which means that it | |
314 | * runs with interrupts turned off. People who may want to modify | |
315 | * mcfrs_interrupt() should try to keep the interrupt handler as fast as | |
316 | * possible. After you are done making modifications, it is not a bad | |
317 | * idea to do: | |
318 | * | |
319 | * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c | |
320 | * | |
321 | * and look at the resulting assemble code in serial.s. | |
322 | * | |
323 | * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 | |
324 | * ----------------------------------------------------------------------- | |
325 | */ | |
326 | ||
327 | static inline void receive_chars(struct mcf_serial *info) | |
328 | { | |
329 | volatile unsigned char *uartp; | |
330 | struct tty_struct *tty = info->tty; | |
33f0f88f | 331 | unsigned char status, ch, flag; |
1da177e4 LT |
332 | |
333 | if (!tty) | |
334 | return; | |
335 | ||
336 | uartp = info->addr; | |
337 | ||
338 | while ((status = uartp[MCFUART_USR]) & MCFUART_USR_RXREADY) { | |
1da177e4 LT |
339 | ch = uartp[MCFUART_URB]; |
340 | info->stats.rx++; | |
341 | ||
342 | #ifdef CONFIG_MAGIC_SYSRQ | |
343 | if (mcfrs_console_inited && (info->line == mcfrs_console_port)) { | |
344 | if (magic_sysrq_key(ch)) | |
345 | continue; | |
346 | } | |
347 | #endif | |
348 | ||
33f0f88f | 349 | flag = TTY_NORMAL; |
1da177e4 LT |
350 | if (status & MCFUART_USR_RXERR) { |
351 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; | |
352 | if (status & MCFUART_USR_RXBREAK) { | |
353 | info->stats.rxbreak++; | |
33f0f88f | 354 | flag = TTY_BREAK; |
1da177e4 LT |
355 | } else if (status & MCFUART_USR_RXPARITY) { |
356 | info->stats.rxparity++; | |
33f0f88f | 357 | flag = TTY_PARITY; |
1da177e4 LT |
358 | } else if (status & MCFUART_USR_RXOVERRUN) { |
359 | info->stats.rxoverrun++; | |
33f0f88f | 360 | flag = TTY_OVERRUN; |
1da177e4 LT |
361 | } else if (status & MCFUART_USR_RXFRAMING) { |
362 | info->stats.rxframing++; | |
33f0f88f | 363 | flag = TTY_FRAME; |
1da177e4 | 364 | } |
1da177e4 | 365 | } |
33f0f88f | 366 | tty_insert_flip_char(tty, ch, flag); |
1da177e4 | 367 | } |
a9cdffb1 | 368 | tty_schedule_flip(tty); |
1da177e4 LT |
369 | return; |
370 | } | |
371 | ||
372 | static inline void transmit_chars(struct mcf_serial *info) | |
373 | { | |
374 | volatile unsigned char *uartp; | |
375 | ||
376 | uartp = info->addr; | |
377 | ||
378 | if (info->x_char) { | |
379 | /* Send special char - probably flow control */ | |
380 | uartp[MCFUART_UTB] = info->x_char; | |
381 | info->x_char = 0; | |
382 | info->stats.tx++; | |
383 | } | |
384 | ||
385 | if ((info->xmit_cnt <= 0) || info->tty->stopped) { | |
386 | info->imr &= ~MCFUART_UIR_TXREADY; | |
387 | uartp[MCFUART_UIMR] = info->imr; | |
388 | return; | |
389 | } | |
390 | ||
391 | while (uartp[MCFUART_USR] & MCFUART_USR_TXREADY) { | |
392 | uartp[MCFUART_UTB] = info->xmit_buf[info->xmit_tail++]; | |
393 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
394 | info->stats.tx++; | |
395 | if (--info->xmit_cnt <= 0) | |
396 | break; | |
397 | } | |
398 | ||
399 | if (info->xmit_cnt < WAKEUP_CHARS) | |
400 | schedule_work(&info->tqueue); | |
401 | return; | |
402 | } | |
403 | ||
404 | /* | |
405 | * This is the serial driver's generic interrupt routine | |
406 | */ | |
7d12e780 | 407 | irqreturn_t mcfrs_interrupt(int irq, void *dev_id) |
1da177e4 LT |
408 | { |
409 | struct mcf_serial *info; | |
410 | unsigned char isr; | |
411 | ||
412 | info = &mcfrs_table[(irq - IRQBASE)]; | |
413 | isr = info->addr[MCFUART_UISR] & info->imr; | |
414 | ||
415 | if (isr & MCFUART_UIR_RXREADY) | |
416 | receive_chars(info); | |
417 | if (isr & MCFUART_UIR_TXREADY) | |
418 | transmit_chars(info); | |
419 | return IRQ_HANDLED; | |
420 | } | |
421 | ||
422 | /* | |
423 | * ------------------------------------------------------------------- | |
424 | * Here ends the serial interrupt routines. | |
425 | * ------------------------------------------------------------------- | |
426 | */ | |
427 | ||
428 | static void mcfrs_offintr(void *private) | |
429 | { | |
430 | struct mcf_serial *info = (struct mcf_serial *) private; | |
431 | struct tty_struct *tty; | |
432 | ||
433 | tty = info->tty; | |
434 | if (!tty) | |
435 | return; | |
436 | tty_wakeup(tty); | |
437 | } | |
438 | ||
439 | ||
440 | /* | |
441 | * Change of state on a DCD line. | |
442 | */ | |
443 | void mcfrs_modem_change(struct mcf_serial *info, int dcd) | |
444 | { | |
445 | if (info->count == 0) | |
446 | return; | |
447 | ||
448 | if (info->flags & ASYNC_CHECK_CD) { | |
449 | if (dcd) | |
450 | wake_up_interruptible(&info->open_wait); | |
451 | else | |
452 | schedule_work(&info->tqueue_hangup); | |
453 | } | |
454 | } | |
455 | ||
456 | ||
457 | #ifdef MCFPP_DCD0 | |
458 | ||
459 | unsigned short mcfrs_ppstatus; | |
460 | ||
461 | /* | |
462 | * This subroutine is called when the RS_TIMER goes off. It is used | |
463 | * to monitor the state of the DCD lines - since they have no edge | |
464 | * sensors and interrupt generators. | |
465 | */ | |
466 | static void mcfrs_timer(void) | |
467 | { | |
468 | unsigned int ppstatus, dcdval, i; | |
469 | ||
470 | ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1); | |
471 | ||
472 | if (ppstatus != mcfrs_ppstatus) { | |
473 | for (i = 0; (i < 2); i++) { | |
474 | dcdval = (i ? MCFPP_DCD1 : MCFPP_DCD0); | |
475 | if ((ppstatus & dcdval) != (mcfrs_ppstatus & dcdval)) { | |
476 | mcfrs_modem_change(&mcfrs_table[i], | |
477 | ((ppstatus & dcdval) ? 0 : 1)); | |
478 | } | |
479 | } | |
480 | } | |
481 | mcfrs_ppstatus = ppstatus; | |
482 | ||
483 | /* Re-arm timer */ | |
484 | mcfrs_timer_struct.expires = jiffies + HZ/25; | |
485 | add_timer(&mcfrs_timer_struct); | |
486 | } | |
487 | ||
488 | #endif /* MCFPP_DCD0 */ | |
489 | ||
490 | ||
491 | /* | |
492 | * This routine is called from the scheduler tqueue when the interrupt | |
493 | * routine has signalled that a hangup has occurred. The path of | |
494 | * hangup processing is: | |
495 | * | |
496 | * serial interrupt routine -> (scheduler tqueue) -> | |
497 | * do_serial_hangup() -> tty->hangup() -> mcfrs_hangup() | |
498 | * | |
499 | */ | |
500 | static void do_serial_hangup(void *private) | |
501 | { | |
502 | struct mcf_serial *info = (struct mcf_serial *) private; | |
503 | struct tty_struct *tty; | |
504 | ||
505 | tty = info->tty; | |
506 | if (!tty) | |
507 | return; | |
508 | ||
509 | tty_hangup(tty); | |
510 | } | |
511 | ||
512 | static int startup(struct mcf_serial * info) | |
513 | { | |
514 | volatile unsigned char *uartp; | |
515 | unsigned long flags; | |
516 | ||
517 | if (info->flags & ASYNC_INITIALIZED) | |
518 | return 0; | |
519 | ||
520 | if (!info->xmit_buf) { | |
521 | info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL); | |
522 | if (!info->xmit_buf) | |
523 | return -ENOMEM; | |
524 | } | |
525 | ||
526 | local_irq_save(flags); | |
527 | ||
528 | #ifdef SERIAL_DEBUG_OPEN | |
529 | printk("starting up ttyS%d (irq %d)...\n", info->line, info->irq); | |
530 | #endif | |
531 | ||
532 | /* | |
533 | * Reset UART, get it into known state... | |
534 | */ | |
535 | uartp = info->addr; | |
536 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
537 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
538 | mcfrs_setsignals(info, 1, 1); | |
539 | ||
540 | if (info->tty) | |
541 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
542 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
543 | ||
544 | /* | |
545 | * and set the speed of the serial port | |
546 | */ | |
547 | mcfrs_change_speed(info); | |
548 | ||
549 | /* | |
550 | * Lastly enable the UART transmitter and receiver, and | |
551 | * interrupt enables. | |
552 | */ | |
553 | info->imr = MCFUART_UIR_RXREADY; | |
554 | uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; | |
555 | uartp[MCFUART_UIMR] = info->imr; | |
556 | ||
557 | info->flags |= ASYNC_INITIALIZED; | |
558 | local_irq_restore(flags); | |
559 | return 0; | |
560 | } | |
561 | ||
562 | /* | |
563 | * This routine will shutdown a serial port; interrupts are disabled, and | |
564 | * DTR is dropped if the hangup on close termio flag is on. | |
565 | */ | |
566 | static void shutdown(struct mcf_serial * info) | |
567 | { | |
568 | volatile unsigned char *uartp; | |
569 | unsigned long flags; | |
570 | ||
571 | if (!(info->flags & ASYNC_INITIALIZED)) | |
572 | return; | |
573 | ||
574 | #ifdef SERIAL_DEBUG_OPEN | |
575 | printk("Shutting down serial port %d (irq %d)....\n", info->line, | |
576 | info->irq); | |
577 | #endif | |
578 | ||
579 | local_irq_save(flags); | |
580 | ||
581 | uartp = info->addr; | |
582 | uartp[MCFUART_UIMR] = 0; /* mask all interrupts */ | |
583 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
584 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
585 | ||
586 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) | |
587 | mcfrs_setsignals(info, 0, 0); | |
588 | ||
589 | if (info->xmit_buf) { | |
590 | free_page((unsigned long) info->xmit_buf); | |
591 | info->xmit_buf = 0; | |
592 | } | |
593 | ||
594 | if (info->tty) | |
595 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
596 | ||
597 | info->flags &= ~ASYNC_INITIALIZED; | |
598 | local_irq_restore(flags); | |
599 | } | |
600 | ||
601 | ||
602 | /* | |
603 | * This routine is called to set the UART divisor registers to match | |
604 | * the specified baud rate for a serial port. | |
605 | */ | |
606 | static void mcfrs_change_speed(struct mcf_serial *info) | |
607 | { | |
608 | volatile unsigned char *uartp; | |
609 | unsigned int baudclk, cflag; | |
610 | unsigned long flags; | |
611 | unsigned char mr1, mr2; | |
612 | int i; | |
613 | #ifdef CONFIG_M5272 | |
614 | unsigned int fraction; | |
615 | #endif | |
616 | ||
617 | if (!info->tty || !info->tty->termios) | |
618 | return; | |
619 | cflag = info->tty->termios->c_cflag; | |
620 | if (info->addr == 0) | |
621 | return; | |
622 | ||
623 | #if 0 | |
624 | printk("%s(%d): mcfrs_change_speed()\n", __FILE__, __LINE__); | |
625 | #endif | |
626 | ||
627 | i = cflag & CBAUD; | |
628 | if (i & CBAUDEX) { | |
629 | i &= ~CBAUDEX; | |
630 | if (i < 1 || i > 4) | |
631 | info->tty->termios->c_cflag &= ~CBAUDEX; | |
632 | else | |
633 | i += 15; | |
634 | } | |
635 | if (i == 0) { | |
636 | mcfrs_setsignals(info, 0, -1); | |
637 | return; | |
638 | } | |
639 | ||
640 | /* compute the baudrate clock */ | |
641 | #ifdef CONFIG_M5272 | |
642 | /* | |
643 | * For the MCF5272, also compute the baudrate fraction. | |
644 | */ | |
645 | baudclk = (MCF_BUSCLK / mcfrs_baud_table[i]) / 32; | |
646 | fraction = MCF_BUSCLK - (baudclk * 32 * mcfrs_baud_table[i]); | |
647 | fraction *= 16; | |
648 | fraction /= (32 * mcfrs_baud_table[i]); | |
649 | #else | |
650 | baudclk = ((MCF_BUSCLK / mcfrs_baud_table[i]) + 16) / 32; | |
651 | #endif | |
652 | ||
653 | info->baud = mcfrs_baud_table[i]; | |
654 | ||
655 | mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR; | |
656 | mr2 = 0; | |
657 | ||
658 | switch (cflag & CSIZE) { | |
659 | case CS5: mr1 |= MCFUART_MR1_CS5; break; | |
660 | case CS6: mr1 |= MCFUART_MR1_CS6; break; | |
661 | case CS7: mr1 |= MCFUART_MR1_CS7; break; | |
662 | case CS8: | |
663 | default: mr1 |= MCFUART_MR1_CS8; break; | |
664 | } | |
665 | ||
666 | if (cflag & PARENB) { | |
667 | if (cflag & CMSPAR) { | |
668 | if (cflag & PARODD) | |
669 | mr1 |= MCFUART_MR1_PARITYMARK; | |
670 | else | |
671 | mr1 |= MCFUART_MR1_PARITYSPACE; | |
672 | } else { | |
673 | if (cflag & PARODD) | |
674 | mr1 |= MCFUART_MR1_PARITYODD; | |
675 | else | |
676 | mr1 |= MCFUART_MR1_PARITYEVEN; | |
677 | } | |
678 | } else { | |
679 | mr1 |= MCFUART_MR1_PARITYNONE; | |
680 | } | |
681 | ||
682 | if (cflag & CSTOPB) | |
683 | mr2 |= MCFUART_MR2_STOP2; | |
684 | else | |
685 | mr2 |= MCFUART_MR2_STOP1; | |
686 | ||
687 | if (cflag & CRTSCTS) { | |
688 | mr1 |= MCFUART_MR1_RXRTS; | |
689 | mr2 |= MCFUART_MR2_TXCTS; | |
690 | } | |
691 | ||
692 | if (cflag & CLOCAL) | |
693 | info->flags &= ~ASYNC_CHECK_CD; | |
694 | else | |
695 | info->flags |= ASYNC_CHECK_CD; | |
696 | ||
697 | uartp = info->addr; | |
698 | ||
699 | local_irq_save(flags); | |
700 | #if 0 | |
701 | printk("%s(%d): mr1=%x mr2=%x baudclk=%x\n", __FILE__, __LINE__, | |
702 | mr1, mr2, baudclk); | |
703 | #endif | |
704 | /* | |
705 | Note: pg 12-16 of MCF5206e User's Manual states that a | |
706 | software reset should be performed prior to changing | |
707 | UMR1,2, UCSR, UACR, bit 7 | |
708 | */ | |
709 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
710 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
711 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */ | |
712 | uartp[MCFUART_UMR] = mr1; | |
713 | uartp[MCFUART_UMR] = mr2; | |
714 | uartp[MCFUART_UBG1] = (baudclk & 0xff00) >> 8; /* set msb byte */ | |
715 | uartp[MCFUART_UBG2] = (baudclk & 0xff); /* set lsb byte */ | |
716 | #ifdef CONFIG_M5272 | |
717 | uartp[MCFUART_UFPD] = (fraction & 0xf); /* set fraction */ | |
718 | #endif | |
719 | uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER; | |
720 | uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; | |
721 | mcfrs_setsignals(info, 1, -1); | |
722 | local_irq_restore(flags); | |
723 | return; | |
724 | } | |
725 | ||
726 | static void mcfrs_flush_chars(struct tty_struct *tty) | |
727 | { | |
728 | volatile unsigned char *uartp; | |
729 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
730 | unsigned long flags; | |
731 | ||
732 | if (serial_paranoia_check(info, tty->name, "mcfrs_flush_chars")) | |
733 | return; | |
734 | ||
735 | uartp = (volatile unsigned char *) info->addr; | |
736 | ||
737 | /* | |
738 | * re-enable receiver interrupt | |
739 | */ | |
740 | local_irq_save(flags); | |
741 | if ((!(info->imr & MCFUART_UIR_RXREADY)) && | |
742 | (info->flags & ASYNC_INITIALIZED) ) { | |
743 | info->imr |= MCFUART_UIR_RXREADY; | |
744 | uartp[MCFUART_UIMR] = info->imr; | |
745 | } | |
746 | local_irq_restore(flags); | |
747 | ||
748 | if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
749 | !info->xmit_buf) | |
750 | return; | |
751 | ||
752 | /* Enable transmitter */ | |
753 | local_irq_save(flags); | |
754 | info->imr |= MCFUART_UIR_TXREADY; | |
755 | uartp[MCFUART_UIMR] = info->imr; | |
756 | local_irq_restore(flags); | |
757 | } | |
758 | ||
759 | static int mcfrs_write(struct tty_struct * tty, | |
760 | const unsigned char *buf, int count) | |
761 | { | |
762 | volatile unsigned char *uartp; | |
763 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
764 | unsigned long flags; | |
765 | int c, total = 0; | |
766 | ||
767 | #if 0 | |
768 | printk("%s(%d): mcfrs_write(tty=%x,buf=%x,count=%d)\n", | |
769 | __FILE__, __LINE__, (int)tty, (int)buf, count); | |
770 | #endif | |
771 | ||
772 | if (serial_paranoia_check(info, tty->name, "mcfrs_write")) | |
773 | return 0; | |
774 | ||
775 | if (!tty || !info->xmit_buf) | |
776 | return 0; | |
777 | ||
778 | local_save_flags(flags); | |
779 | while (1) { | |
780 | local_irq_disable(); | |
781 | c = min(count, (int) min(((int)SERIAL_XMIT_SIZE) - info->xmit_cnt - 1, | |
782 | ((int)SERIAL_XMIT_SIZE) - info->xmit_head)); | |
783 | local_irq_restore(flags); | |
784 | ||
785 | if (c <= 0) | |
786 | break; | |
787 | ||
788 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
789 | ||
790 | local_irq_disable(); | |
791 | info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
792 | info->xmit_cnt += c; | |
793 | local_irq_restore(flags); | |
794 | ||
795 | buf += c; | |
796 | count -= c; | |
797 | total += c; | |
798 | } | |
799 | ||
800 | local_irq_disable(); | |
801 | uartp = info->addr; | |
802 | info->imr |= MCFUART_UIR_TXREADY; | |
803 | uartp[MCFUART_UIMR] = info->imr; | |
804 | local_irq_restore(flags); | |
805 | ||
806 | return total; | |
807 | } | |
808 | ||
809 | static int mcfrs_write_room(struct tty_struct *tty) | |
810 | { | |
811 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
812 | int ret; | |
813 | ||
814 | if (serial_paranoia_check(info, tty->name, "mcfrs_write_room")) | |
815 | return 0; | |
816 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
817 | if (ret < 0) | |
818 | ret = 0; | |
819 | return ret; | |
820 | } | |
821 | ||
822 | static int mcfrs_chars_in_buffer(struct tty_struct *tty) | |
823 | { | |
824 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
825 | ||
826 | if (serial_paranoia_check(info, tty->name, "mcfrs_chars_in_buffer")) | |
827 | return 0; | |
828 | return info->xmit_cnt; | |
829 | } | |
830 | ||
831 | static void mcfrs_flush_buffer(struct tty_struct *tty) | |
832 | { | |
833 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
834 | unsigned long flags; | |
835 | ||
836 | if (serial_paranoia_check(info, tty->name, "mcfrs_flush_buffer")) | |
837 | return; | |
838 | ||
839 | local_irq_save(flags); | |
840 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
841 | local_irq_restore(flags); | |
842 | ||
843 | tty_wakeup(tty); | |
844 | } | |
845 | ||
846 | /* | |
847 | * ------------------------------------------------------------ | |
848 | * mcfrs_throttle() | |
849 | * | |
850 | * This routine is called by the upper-layer tty layer to signal that | |
851 | * incoming characters should be throttled. | |
852 | * ------------------------------------------------------------ | |
853 | */ | |
854 | static void mcfrs_throttle(struct tty_struct * tty) | |
855 | { | |
856 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
857 | #ifdef SERIAL_DEBUG_THROTTLE | |
858 | char buf[64]; | |
859 | ||
860 | printk("throttle %s: %d....\n", _tty_name(tty, buf), | |
861 | tty->ldisc.chars_in_buffer(tty)); | |
862 | #endif | |
863 | ||
864 | if (serial_paranoia_check(info, tty->name, "mcfrs_throttle")) | |
865 | return; | |
866 | ||
867 | if (I_IXOFF(tty)) | |
868 | info->x_char = STOP_CHAR(tty); | |
869 | ||
870 | /* Turn off RTS line (do this atomic) */ | |
871 | } | |
872 | ||
873 | static void mcfrs_unthrottle(struct tty_struct * tty) | |
874 | { | |
875 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
876 | #ifdef SERIAL_DEBUG_THROTTLE | |
877 | char buf[64]; | |
878 | ||
879 | printk("unthrottle %s: %d....\n", _tty_name(tty, buf), | |
880 | tty->ldisc.chars_in_buffer(tty)); | |
881 | #endif | |
882 | ||
883 | if (serial_paranoia_check(info, tty->name, "mcfrs_unthrottle")) | |
884 | return; | |
885 | ||
886 | if (I_IXOFF(tty)) { | |
887 | if (info->x_char) | |
888 | info->x_char = 0; | |
889 | else | |
890 | info->x_char = START_CHAR(tty); | |
891 | } | |
892 | ||
893 | /* Assert RTS line (do this atomic) */ | |
894 | } | |
895 | ||
896 | /* | |
897 | * ------------------------------------------------------------ | |
898 | * mcfrs_ioctl() and friends | |
899 | * ------------------------------------------------------------ | |
900 | */ | |
901 | ||
902 | static int get_serial_info(struct mcf_serial * info, | |
903 | struct serial_struct * retinfo) | |
904 | { | |
905 | struct serial_struct tmp; | |
906 | ||
907 | if (!retinfo) | |
908 | return -EFAULT; | |
909 | memset(&tmp, 0, sizeof(tmp)); | |
910 | tmp.type = info->type; | |
911 | tmp.line = info->line; | |
912 | tmp.port = (unsigned int) info->addr; | |
913 | tmp.irq = info->irq; | |
914 | tmp.flags = info->flags; | |
915 | tmp.baud_base = info->baud_base; | |
916 | tmp.close_delay = info->close_delay; | |
917 | tmp.closing_wait = info->closing_wait; | |
918 | tmp.custom_divisor = info->custom_divisor; | |
919 | return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0; | |
920 | } | |
921 | ||
922 | static int set_serial_info(struct mcf_serial * info, | |
923 | struct serial_struct * new_info) | |
924 | { | |
925 | struct serial_struct new_serial; | |
926 | struct mcf_serial old_info; | |
927 | int retval = 0; | |
928 | ||
929 | if (!new_info) | |
930 | return -EFAULT; | |
931 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) | |
932 | return -EFAULT; | |
933 | old_info = *info; | |
934 | ||
935 | if (!capable(CAP_SYS_ADMIN)) { | |
936 | if ((new_serial.baud_base != info->baud_base) || | |
937 | (new_serial.type != info->type) || | |
938 | (new_serial.close_delay != info->close_delay) || | |
939 | ((new_serial.flags & ~ASYNC_USR_MASK) != | |
940 | (info->flags & ~ASYNC_USR_MASK))) | |
941 | return -EPERM; | |
942 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | | |
943 | (new_serial.flags & ASYNC_USR_MASK)); | |
944 | info->custom_divisor = new_serial.custom_divisor; | |
945 | goto check_and_exit; | |
946 | } | |
947 | ||
948 | if (info->count > 1) | |
949 | return -EBUSY; | |
950 | ||
951 | /* | |
952 | * OK, past this point, all the error checking has been done. | |
953 | * At this point, we start making changes..... | |
954 | */ | |
955 | ||
956 | info->baud_base = new_serial.baud_base; | |
957 | info->flags = ((info->flags & ~ASYNC_FLAGS) | | |
958 | (new_serial.flags & ASYNC_FLAGS)); | |
959 | info->type = new_serial.type; | |
960 | info->close_delay = new_serial.close_delay; | |
961 | info->closing_wait = new_serial.closing_wait; | |
962 | ||
963 | check_and_exit: | |
964 | retval = startup(info); | |
965 | return retval; | |
966 | } | |
967 | ||
968 | /* | |
969 | * get_lsr_info - get line status register info | |
970 | * | |
971 | * Purpose: Let user call ioctl() to get info when the UART physically | |
972 | * is emptied. On bus types like RS485, the transmitter must | |
973 | * release the bus after transmitting. This must be done when | |
974 | * the transmit shift register is empty, not be done when the | |
975 | * transmit holding register is empty. This functionality | |
976 | * allows an RS485 driver to be written in user space. | |
977 | */ | |
978 | static int get_lsr_info(struct mcf_serial * info, unsigned int *value) | |
979 | { | |
980 | volatile unsigned char *uartp; | |
981 | unsigned long flags; | |
982 | unsigned char status; | |
983 | ||
984 | local_irq_save(flags); | |
985 | uartp = info->addr; | |
986 | status = (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY) ? TIOCSER_TEMT : 0; | |
987 | local_irq_restore(flags); | |
988 | ||
989 | return put_user(status,value); | |
990 | } | |
991 | ||
992 | /* | |
993 | * This routine sends a break character out the serial port. | |
994 | */ | |
995 | static void send_break( struct mcf_serial * info, int duration) | |
996 | { | |
997 | volatile unsigned char *uartp; | |
998 | unsigned long flags; | |
999 | ||
1000 | if (!info->addr) | |
1001 | return; | |
1002 | set_current_state(TASK_INTERRUPTIBLE); | |
1003 | uartp = info->addr; | |
1004 | ||
1005 | local_irq_save(flags); | |
1006 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTART; | |
1007 | schedule_timeout(duration); | |
1008 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTOP; | |
1009 | local_irq_restore(flags); | |
1010 | } | |
1011 | ||
1012 | static int mcfrs_tiocmget(struct tty_struct *tty, struct file *file) | |
1013 | { | |
1014 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1015 | ||
1016 | if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl")) | |
1017 | return -ENODEV; | |
1018 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1019 | return -EIO; | |
1020 | ||
1021 | return mcfrs_getsignals(info); | |
1022 | } | |
1023 | ||
1024 | static int mcfrs_tiocmset(struct tty_struct *tty, struct file *file, | |
1025 | unsigned int set, unsigned int clear) | |
1026 | { | |
1027 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1028 | int rts = -1, dtr = -1; | |
1029 | ||
1030 | if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl")) | |
1031 | return -ENODEV; | |
1032 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1033 | return -EIO; | |
1034 | ||
1035 | if (set & TIOCM_RTS) | |
1036 | rts = 1; | |
1037 | if (set & TIOCM_DTR) | |
1038 | dtr = 1; | |
1039 | if (clear & TIOCM_RTS) | |
1040 | rts = 0; | |
1041 | if (clear & TIOCM_DTR) | |
1042 | dtr = 0; | |
1043 | ||
1044 | mcfrs_setsignals(info, dtr, rts); | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | static int mcfrs_ioctl(struct tty_struct *tty, struct file * file, | |
1050 | unsigned int cmd, unsigned long arg) | |
1051 | { | |
1052 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1053 | int retval, error; | |
1054 | ||
1055 | if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl")) | |
1056 | return -ENODEV; | |
1057 | ||
1058 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1059 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && | |
1060 | (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) { | |
1061 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1062 | return -EIO; | |
1063 | } | |
1064 | ||
1065 | switch (cmd) { | |
1066 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1067 | retval = tty_check_change(tty); | |
1068 | if (retval) | |
1069 | return retval; | |
1070 | tty_wait_until_sent(tty, 0); | |
1071 | if (!arg) | |
1072 | send_break(info, HZ/4); /* 1/4 second */ | |
1073 | return 0; | |
1074 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1075 | retval = tty_check_change(tty); | |
1076 | if (retval) | |
1077 | return retval; | |
1078 | tty_wait_until_sent(tty, 0); | |
1079 | send_break(info, arg ? arg*(HZ/10) : HZ/4); | |
1080 | return 0; | |
1081 | case TIOCGSOFTCAR: | |
1082 | error = put_user(C_CLOCAL(tty) ? 1 : 0, | |
1083 | (unsigned long *) arg); | |
1084 | if (error) | |
1085 | return error; | |
1086 | return 0; | |
1087 | case TIOCSSOFTCAR: | |
1088 | get_user(arg, (unsigned long *) arg); | |
1089 | tty->termios->c_cflag = | |
1090 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1091 | (arg ? CLOCAL : 0)); | |
1092 | return 0; | |
1093 | case TIOCGSERIAL: | |
1094 | if (access_ok(VERIFY_WRITE, (void *) arg, | |
1095 | sizeof(struct serial_struct))) | |
1096 | return get_serial_info(info, | |
1097 | (struct serial_struct *) arg); | |
1098 | return -EFAULT; | |
1099 | case TIOCSSERIAL: | |
1100 | return set_serial_info(info, | |
1101 | (struct serial_struct *) arg); | |
1102 | case TIOCSERGETLSR: /* Get line status register */ | |
1103 | if (access_ok(VERIFY_WRITE, (void *) arg, | |
1104 | sizeof(unsigned int))) | |
1105 | return get_lsr_info(info, (unsigned int *) arg); | |
1106 | return -EFAULT; | |
1107 | case TIOCSERGSTRUCT: | |
1108 | error = copy_to_user((struct mcf_serial *) arg, | |
1109 | info, sizeof(struct mcf_serial)); | |
1110 | if (error) | |
1111 | return -EFAULT; | |
1112 | return 0; | |
1113 | ||
1114 | #ifdef TIOCSET422 | |
1115 | case TIOCSET422: { | |
1116 | unsigned int val; | |
1117 | get_user(val, (unsigned int *) arg); | |
1118 | mcf_setpa(MCFPP_PA11, (val ? 0 : MCFPP_PA11)); | |
1119 | break; | |
1120 | } | |
1121 | case TIOCGET422: { | |
1122 | unsigned int val; | |
1123 | val = (mcf_getpa() & MCFPP_PA11) ? 0 : 1; | |
1124 | put_user(val, (unsigned int *) arg); | |
1125 | break; | |
1126 | } | |
1127 | #endif | |
1128 | ||
1129 | default: | |
1130 | return -ENOIOCTLCMD; | |
1131 | } | |
1132 | return 0; | |
1133 | } | |
1134 | ||
606d099c | 1135 | static void mcfrs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
1136 | { |
1137 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
1138 | ||
1139 | if (tty->termios->c_cflag == old_termios->c_cflag) | |
1140 | return; | |
1141 | ||
1142 | mcfrs_change_speed(info); | |
1143 | ||
1144 | if ((old_termios->c_cflag & CRTSCTS) && | |
1145 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1146 | tty->hw_stopped = 0; | |
1147 | mcfrs_setsignals(info, -1, 1); | |
1148 | #if 0 | |
1149 | mcfrs_start(tty); | |
1150 | #endif | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * ------------------------------------------------------------ | |
1156 | * mcfrs_close() | |
1157 | * | |
1158 | * This routine is called when the serial port gets closed. First, we | |
1159 | * wait for the last remaining data to be sent. Then, we unlink its | |
1160 | * S structure from the interrupt chain if necessary, and we free | |
1161 | * that IRQ if nothing is left in the chain. | |
1162 | * ------------------------------------------------------------ | |
1163 | */ | |
1164 | static void mcfrs_close(struct tty_struct *tty, struct file * filp) | |
1165 | { | |
1166 | volatile unsigned char *uartp; | |
1167 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
1168 | unsigned long flags; | |
1169 | ||
1170 | if (!info || serial_paranoia_check(info, tty->name, "mcfrs_close")) | |
1171 | return; | |
1172 | ||
1173 | local_irq_save(flags); | |
1174 | ||
1175 | if (tty_hung_up_p(filp)) { | |
1176 | local_irq_restore(flags); | |
1177 | return; | |
1178 | } | |
1179 | ||
1180 | #ifdef SERIAL_DEBUG_OPEN | |
1181 | printk("mcfrs_close ttyS%d, count = %d\n", info->line, info->count); | |
1182 | #endif | |
1183 | if ((tty->count == 1) && (info->count != 1)) { | |
1184 | /* | |
1185 | * Uh, oh. tty->count is 1, which means that the tty | |
1186 | * structure will be freed. Info->count should always | |
1187 | * be one in these conditions. If it's greater than | |
1188 | * one, we've got real problems, since it means the | |
1189 | * serial port won't be shutdown. | |
1190 | */ | |
1191 | printk("MCFRS: bad serial port count; tty->count is 1, " | |
1192 | "info->count is %d\n", info->count); | |
1193 | info->count = 1; | |
1194 | } | |
1195 | if (--info->count < 0) { | |
1196 | printk("MCFRS: bad serial port count for ttyS%d: %d\n", | |
1197 | info->line, info->count); | |
1198 | info->count = 0; | |
1199 | } | |
1200 | if (info->count) { | |
1201 | local_irq_restore(flags); | |
1202 | return; | |
1203 | } | |
1204 | info->flags |= ASYNC_CLOSING; | |
1205 | ||
1206 | /* | |
1207 | * Now we wait for the transmit buffer to clear; and we notify | |
1208 | * the line discipline to only process XON/XOFF characters. | |
1209 | */ | |
1210 | tty->closing = 1; | |
1211 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1212 | tty_wait_until_sent(tty, info->closing_wait); | |
1213 | ||
1214 | /* | |
1215 | * At this point we stop accepting input. To do this, we | |
1216 | * disable the receive line status interrupts, and tell the | |
1217 | * interrupt driver to stop checking the data ready bit in the | |
1218 | * line status register. | |
1219 | */ | |
1220 | info->imr &= ~MCFUART_UIR_RXREADY; | |
1221 | uartp = info->addr; | |
1222 | uartp[MCFUART_UIMR] = info->imr; | |
1223 | ||
1224 | #if 0 | |
1225 | /* FIXME: do we need to keep this enabled for console?? */ | |
1226 | if (mcfrs_console_inited && (mcfrs_console_port == info->line)) { | |
1227 | /* Do not disable the UART */ ; | |
1228 | } else | |
1229 | #endif | |
1230 | shutdown(info); | |
1231 | if (tty->driver->flush_buffer) | |
1232 | tty->driver->flush_buffer(tty); | |
1233 | tty_ldisc_flush(tty); | |
1234 | ||
1235 | tty->closing = 0; | |
1236 | info->event = 0; | |
1237 | info->tty = 0; | |
1238 | #if 0 | |
1239 | if (tty->ldisc.num != ldiscs[N_TTY].num) { | |
1240 | if (tty->ldisc.close) | |
1241 | (tty->ldisc.close)(tty); | |
1242 | tty->ldisc = ldiscs[N_TTY]; | |
1243 | tty->termios->c_line = N_TTY; | |
1244 | if (tty->ldisc.open) | |
1245 | (tty->ldisc.open)(tty); | |
1246 | } | |
1247 | #endif | |
1248 | if (info->blocked_open) { | |
1249 | if (info->close_delay) { | |
1250 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); | |
1251 | } | |
1252 | wake_up_interruptible(&info->open_wait); | |
1253 | } | |
1254 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1255 | wake_up_interruptible(&info->close_wait); | |
1256 | local_irq_restore(flags); | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * mcfrs_wait_until_sent() --- wait until the transmitter is empty | |
1261 | */ | |
1262 | static void | |
1263 | mcfrs_wait_until_sent(struct tty_struct *tty, int timeout) | |
1264 | { | |
1265 | #ifdef CONFIG_M5272 | |
1266 | #define MCF5272_FIFO_SIZE 25 /* fifo size + shift reg */ | |
1267 | ||
1268 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1269 | volatile unsigned char *uartp; | |
1270 | unsigned long orig_jiffies, fifo_time, char_time, fifo_cnt; | |
1271 | ||
1272 | if (serial_paranoia_check(info, tty->name, "mcfrs_wait_until_sent")) | |
1273 | return; | |
1274 | ||
1275 | orig_jiffies = jiffies; | |
1276 | ||
1277 | /* | |
1278 | * Set the check interval to be 1/5 of the approximate time | |
1279 | * to send the entire fifo, and make it at least 1. The check | |
1280 | * interval should also be less than the timeout. | |
1281 | * | |
1282 | * Note: we have to use pretty tight timings here to satisfy | |
1283 | * the NIST-PCTS. | |
1284 | */ | |
1285 | fifo_time = (MCF5272_FIFO_SIZE * HZ * 10) / info->baud; | |
1286 | char_time = fifo_time / 5; | |
1287 | if (char_time == 0) | |
1288 | char_time = 1; | |
1289 | if (timeout && timeout < char_time) | |
1290 | char_time = timeout; | |
1291 | ||
1292 | /* | |
1293 | * Clamp the timeout period at 2 * the time to empty the | |
1294 | * fifo. Just to be safe, set the minimum at .5 seconds. | |
1295 | */ | |
1296 | fifo_time *= 2; | |
1297 | if (fifo_time < (HZ/2)) | |
1298 | fifo_time = HZ/2; | |
1299 | if (!timeout || timeout > fifo_time) | |
1300 | timeout = fifo_time; | |
1301 | ||
1302 | /* | |
1303 | * Account for the number of bytes in the UART | |
1304 | * transmitter FIFO plus any byte being shifted out. | |
1305 | */ | |
1306 | uartp = (volatile unsigned char *) info->addr; | |
1307 | for (;;) { | |
1308 | fifo_cnt = (uartp[MCFUART_UTF] & MCFUART_UTF_TXB); | |
1309 | if ((uartp[MCFUART_USR] & (MCFUART_USR_TXREADY| | |
1310 | MCFUART_USR_TXEMPTY)) == | |
1311 | MCFUART_USR_TXREADY) | |
1312 | fifo_cnt++; | |
1313 | if (fifo_cnt == 0) | |
1314 | break; | |
1315 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
1316 | if (signal_pending(current)) | |
1317 | break; | |
1318 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
1319 | break; | |
1320 | } | |
1321 | #else | |
1322 | /* | |
1323 | * For the other coldfire models, assume all data has been sent | |
1324 | */ | |
1325 | #endif | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * mcfrs_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1330 | */ | |
1331 | void mcfrs_hangup(struct tty_struct *tty) | |
1332 | { | |
1333 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1334 | ||
1335 | if (serial_paranoia_check(info, tty->name, "mcfrs_hangup")) | |
1336 | return; | |
1337 | ||
1338 | mcfrs_flush_buffer(tty); | |
1339 | shutdown(info); | |
1340 | info->event = 0; | |
1341 | info->count = 0; | |
1342 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1343 | info->tty = 0; | |
1344 | wake_up_interruptible(&info->open_wait); | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * ------------------------------------------------------------ | |
1349 | * mcfrs_open() and friends | |
1350 | * ------------------------------------------------------------ | |
1351 | */ | |
1352 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
1353 | struct mcf_serial *info) | |
1354 | { | |
1355 | DECLARE_WAITQUEUE(wait, current); | |
1356 | int retval; | |
1357 | int do_clocal = 0; | |
1358 | ||
1359 | /* | |
1360 | * If the device is in the middle of being closed, then block | |
1361 | * until it's done, and then try again. | |
1362 | */ | |
1363 | if (info->flags & ASYNC_CLOSING) { | |
1364 | interruptible_sleep_on(&info->close_wait); | |
1365 | #ifdef SERIAL_DO_RESTART | |
1366 | if (info->flags & ASYNC_HUP_NOTIFY) | |
1367 | return -EAGAIN; | |
1368 | else | |
1369 | return -ERESTARTSYS; | |
1370 | #else | |
1371 | return -EAGAIN; | |
1372 | #endif | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * If non-blocking mode is set, or the port is not enabled, | |
1377 | * then make the check up front and then exit. | |
1378 | */ | |
1379 | if ((filp->f_flags & O_NONBLOCK) || | |
1380 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
1381 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | if (tty->termios->c_cflag & CLOCAL) | |
1386 | do_clocal = 1; | |
1387 | ||
1388 | /* | |
1389 | * Block waiting for the carrier detect and the line to become | |
1390 | * free (i.e., not in use by the callout). While we are in | |
1391 | * this loop, info->count is dropped by one, so that | |
1392 | * mcfrs_close() knows when to free things. We restore it upon | |
1393 | * exit, either normal or abnormal. | |
1394 | */ | |
1395 | retval = 0; | |
1396 | add_wait_queue(&info->open_wait, &wait); | |
1397 | #ifdef SERIAL_DEBUG_OPEN | |
1398 | printk("block_til_ready before block: ttyS%d, count = %d\n", | |
1399 | info->line, info->count); | |
1400 | #endif | |
1401 | info->count--; | |
1402 | info->blocked_open++; | |
1403 | while (1) { | |
1404 | local_irq_disable(); | |
1405 | mcfrs_setsignals(info, 1, 1); | |
1406 | local_irq_enable(); | |
1407 | current->state = TASK_INTERRUPTIBLE; | |
1408 | if (tty_hung_up_p(filp) || | |
1409 | !(info->flags & ASYNC_INITIALIZED)) { | |
1410 | #ifdef SERIAL_DO_RESTART | |
1411 | if (info->flags & ASYNC_HUP_NOTIFY) | |
1412 | retval = -EAGAIN; | |
1413 | else | |
1414 | retval = -ERESTARTSYS; | |
1415 | #else | |
1416 | retval = -EAGAIN; | |
1417 | #endif | |
1418 | break; | |
1419 | } | |
1420 | if (!(info->flags & ASYNC_CLOSING) && | |
1421 | (do_clocal || (mcfrs_getsignals(info) & TIOCM_CD))) | |
1422 | break; | |
1423 | if (signal_pending(current)) { | |
1424 | retval = -ERESTARTSYS; | |
1425 | break; | |
1426 | } | |
1427 | #ifdef SERIAL_DEBUG_OPEN | |
1428 | printk("block_til_ready blocking: ttyS%d, count = %d\n", | |
1429 | info->line, info->count); | |
1430 | #endif | |
1431 | schedule(); | |
1432 | } | |
1433 | current->state = TASK_RUNNING; | |
1434 | remove_wait_queue(&info->open_wait, &wait); | |
1435 | if (!tty_hung_up_p(filp)) | |
1436 | info->count++; | |
1437 | info->blocked_open--; | |
1438 | #ifdef SERIAL_DEBUG_OPEN | |
1439 | printk("block_til_ready after blocking: ttyS%d, count = %d\n", | |
1440 | info->line, info->count); | |
1441 | #endif | |
1442 | if (retval) | |
1443 | return retval; | |
1444 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * This routine is called whenever a serial port is opened. It | |
1450 | * enables interrupts for a serial port, linking in its structure into | |
1451 | * the IRQ chain. It also performs the serial-specific | |
1452 | * initialization for the tty structure. | |
1453 | */ | |
1454 | int mcfrs_open(struct tty_struct *tty, struct file * filp) | |
1455 | { | |
1456 | struct mcf_serial *info; | |
1457 | int retval, line; | |
1458 | ||
1459 | line = tty->index; | |
1460 | if ((line < 0) || (line >= NR_PORTS)) | |
1461 | return -ENODEV; | |
1462 | info = mcfrs_table + line; | |
1463 | if (serial_paranoia_check(info, tty->name, "mcfrs_open")) | |
1464 | return -ENODEV; | |
1465 | #ifdef SERIAL_DEBUG_OPEN | |
1466 | printk("mcfrs_open %s, count = %d\n", tty->name, info->count); | |
1467 | #endif | |
1468 | info->count++; | |
1469 | tty->driver_data = info; | |
1470 | info->tty = tty; | |
1471 | ||
1472 | /* | |
1473 | * Start up serial port | |
1474 | */ | |
1475 | retval = startup(info); | |
1476 | if (retval) | |
1477 | return retval; | |
1478 | ||
1479 | retval = block_til_ready(tty, filp, info); | |
1480 | if (retval) { | |
1481 | #ifdef SERIAL_DEBUG_OPEN | |
1482 | printk("mcfrs_open returning after block_til_ready with %d\n", | |
1483 | retval); | |
1484 | #endif | |
1485 | return retval; | |
1486 | } | |
1487 | ||
1488 | #ifdef SERIAL_DEBUG_OPEN | |
1489 | printk("mcfrs_open %s successful...\n", tty->name); | |
1490 | #endif | |
1491 | return 0; | |
1492 | } | |
1493 | ||
1494 | /* | |
1495 | * Based on the line number set up the internal interrupt stuff. | |
1496 | */ | |
1497 | static void mcfrs_irqinit(struct mcf_serial *info) | |
1498 | { | |
1499 | #if defined(CONFIG_M5272) | |
1500 | volatile unsigned long *icrp; | |
1501 | volatile unsigned long *portp; | |
1502 | volatile unsigned char *uartp; | |
1503 | ||
1504 | uartp = info->addr; | |
1505 | icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR2); | |
1506 | ||
1507 | switch (info->line) { | |
1508 | case 0: | |
1509 | *icrp = 0xe0000000; | |
1510 | break; | |
1511 | case 1: | |
1512 | *icrp = 0x0e000000; | |
1513 | break; | |
1514 | default: | |
1515 | printk("MCFRS: don't know how to handle UART %d interrupt?\n", | |
1516 | info->line); | |
1517 | return; | |
1518 | } | |
1519 | ||
1520 | /* Enable the output lines for the serial ports */ | |
1521 | portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PBCNT); | |
1522 | *portp = (*portp & ~0x000000ff) | 0x00000055; | |
1523 | portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PDCNT); | |
1524 | *portp = (*portp & ~0x000003fc) | 0x000002a8; | |
b0433b99 | 1525 | #elif defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) |
1da177e4 LT |
1526 | volatile unsigned char *icrp, *uartp; |
1527 | volatile unsigned long *imrp; | |
1528 | ||
1529 | uartp = info->addr; | |
1530 | ||
1531 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 + | |
1532 | MCFINTC_ICR0 + MCFINT_UART0 + info->line); | |
082f2c1c | 1533 | *icrp = 0x30 + info->line; /* level 6, line based priority */ |
1da177e4 LT |
1534 | |
1535 | imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 + | |
1536 | MCFINTC_IMRL); | |
1537 | *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1); | |
a8b8d57c GU |
1538 | #if defined(CONFIG_M527x) |
1539 | { | |
1540 | /* | |
1541 | * External Pin Mask Setting & Enable External Pin for Interface | |
1542 | * mrcbis@aliceposta.it | |
1543 | */ | |
1544 | unsigned short *serpin_enable_mask; | |
1545 | serpin_enable_mask = (MCF_IPSBAR + MCF_GPIO_PAR_UART); | |
1546 | if (info->line == 0) | |
1547 | *serpin_enable_mask |= UART0_ENABLE_MASK; | |
1548 | else if (info->line == 1) | |
1549 | *serpin_enable_mask |= UART1_ENABLE_MASK; | |
1550 | else if (info->line == 2) | |
1551 | *serpin_enable_mask |= UART2_ENABLE_MASK; | |
1552 | } | |
1553 | #endif | |
7f04d62b GU |
1554 | #elif defined(CONFIG_M520x) |
1555 | volatile unsigned char *icrp, *uartp; | |
1556 | volatile unsigned long *imrp; | |
1557 | ||
1558 | uartp = info->addr; | |
1559 | ||
1560 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 + | |
1561 | MCFINTC_ICR0 + MCFINT_UART0 + info->line); | |
1562 | *icrp = 0x03; | |
1563 | ||
1564 | imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 + | |
1565 | MCFINTC_IMRL); | |
1566 | *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1); | |
1567 | if (info->line < 2) { | |
1568 | unsigned short *uart_par; | |
1569 | uart_par = (unsigned short *)(MCF_IPSBAR + MCF_GPIO_PAR_UART); | |
1570 | if (info->line == 0) | |
1571 | *uart_par |= MCF_GPIO_PAR_UART_PAR_UTXD0 | |
1572 | | MCF_GPIO_PAR_UART_PAR_URXD0; | |
1573 | else if (info->line == 1) | |
1574 | *uart_par |= MCF_GPIO_PAR_UART_PAR_UTXD1 | |
1575 | | MCF_GPIO_PAR_UART_PAR_URXD1; | |
1576 | } else if (info->line == 2) { | |
1577 | unsigned char *feci2c_par; | |
1578 | feci2c_par = (unsigned char *)(MCF_IPSBAR + MCF_GPIO_PAR_FECI2C); | |
1579 | *feci2c_par &= ~0x0F; | |
1580 | *feci2c_par |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 | |
1581 | | MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2; | |
1582 | } | |
76aa698f GU |
1583 | #elif defined(CONFIG_M532x) |
1584 | volatile unsigned char *uartp; | |
1585 | uartp = info->addr; | |
1586 | switch (info->line) { | |
1587 | case 0: | |
1588 | MCF_INTC0_ICR26 = 0x3; | |
1589 | MCF_INTC0_CIMR = 26; | |
1590 | /* GPIO initialization */ | |
1591 | MCF_GPIO_PAR_UART |= 0x000F; | |
1592 | break; | |
1593 | case 1: | |
1594 | MCF_INTC0_ICR27 = 0x3; | |
1595 | MCF_INTC0_CIMR = 27; | |
1596 | /* GPIO initialization */ | |
1597 | MCF_GPIO_PAR_UART |= 0x0FF0; | |
1598 | break; | |
1599 | case 2: | |
1600 | MCF_INTC0_ICR28 = 0x3; | |
1601 | MCF_INTC0_CIMR = 28; | |
1602 | /* GPIOs also must be initalized, depends on board */ | |
1603 | break; | |
1604 | } | |
1da177e4 LT |
1605 | #else |
1606 | volatile unsigned char *icrp, *uartp; | |
1607 | ||
1608 | switch (info->line) { | |
1609 | case 0: | |
1610 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART1ICR); | |
1611 | *icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 | | |
1612 | MCFSIM_ICR_PRI1; | |
1613 | mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART1); | |
1614 | break; | |
1615 | case 1: | |
1616 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART2ICR); | |
1617 | *icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 | | |
1618 | MCFSIM_ICR_PRI2; | |
1619 | mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART2); | |
1620 | break; | |
1621 | default: | |
1622 | printk("MCFRS: don't know how to handle UART %d interrupt?\n", | |
1623 | info->line); | |
1624 | return; | |
1625 | } | |
1626 | ||
1627 | uartp = info->addr; | |
1628 | uartp[MCFUART_UIVR] = info->irq; | |
1629 | #endif | |
1630 | ||
1631 | /* Clear mask, so no surprise interrupts. */ | |
1632 | uartp[MCFUART_UIMR] = 0; | |
1633 | ||
40663cc7 | 1634 | if (request_irq(info->irq, mcfrs_interrupt, IRQF_DISABLED, |
1da177e4 LT |
1635 | "ColdFire UART", NULL)) { |
1636 | printk("MCFRS: Unable to attach ColdFire UART %d interrupt " | |
1637 | "vector=%d\n", info->line, info->irq); | |
1638 | } | |
1639 | ||
1640 | return; | |
1641 | } | |
1642 | ||
1643 | ||
1644 | char *mcfrs_drivername = "ColdFire internal UART serial driver version 1.00\n"; | |
1645 | ||
1646 | ||
1647 | /* | |
1648 | * Serial stats reporting... | |
1649 | */ | |
1650 | int mcfrs_readproc(char *page, char **start, off_t off, int count, | |
1651 | int *eof, void *data) | |
1652 | { | |
1653 | struct mcf_serial *info; | |
1654 | char str[20]; | |
1655 | int len, sigs, i; | |
1656 | ||
1657 | len = sprintf(page, mcfrs_drivername); | |
1658 | for (i = 0; (i < NR_PORTS); i++) { | |
1659 | info = &mcfrs_table[i]; | |
1660 | len += sprintf((page + len), "%d: port:%x irq=%d baud:%d ", | |
1661 | i, (unsigned int) info->addr, info->irq, info->baud); | |
1662 | if (info->stats.rx || info->stats.tx) | |
1663 | len += sprintf((page + len), "tx:%d rx:%d ", | |
1664 | info->stats.tx, info->stats.rx); | |
1665 | if (info->stats.rxframing) | |
1666 | len += sprintf((page + len), "fe:%d ", | |
1667 | info->stats.rxframing); | |
1668 | if (info->stats.rxparity) | |
1669 | len += sprintf((page + len), "pe:%d ", | |
1670 | info->stats.rxparity); | |
1671 | if (info->stats.rxbreak) | |
1672 | len += sprintf((page + len), "brk:%d ", | |
1673 | info->stats.rxbreak); | |
1674 | if (info->stats.rxoverrun) | |
1675 | len += sprintf((page + len), "oe:%d ", | |
1676 | info->stats.rxoverrun); | |
1677 | ||
1678 | str[0] = str[1] = 0; | |
1679 | if ((sigs = mcfrs_getsignals(info))) { | |
1680 | if (sigs & TIOCM_RTS) | |
1681 | strcat(str, "|RTS"); | |
1682 | if (sigs & TIOCM_CTS) | |
1683 | strcat(str, "|CTS"); | |
1684 | if (sigs & TIOCM_DTR) | |
1685 | strcat(str, "|DTR"); | |
1686 | if (sigs & TIOCM_CD) | |
1687 | strcat(str, "|CD"); | |
1688 | } | |
1689 | ||
1690 | len += sprintf((page + len), "%s\n", &str[1]); | |
1691 | } | |
1692 | ||
1693 | return(len); | |
1694 | } | |
1695 | ||
1696 | ||
1697 | /* Finally, routines used to initialize the serial driver. */ | |
1698 | ||
1699 | static void show_serial_version(void) | |
1700 | { | |
1701 | printk(mcfrs_drivername); | |
1702 | } | |
1703 | ||
b68e31d0 | 1704 | static const struct tty_operations mcfrs_ops = { |
1da177e4 LT |
1705 | .open = mcfrs_open, |
1706 | .close = mcfrs_close, | |
1707 | .write = mcfrs_write, | |
1708 | .flush_chars = mcfrs_flush_chars, | |
1709 | .write_room = mcfrs_write_room, | |
1710 | .chars_in_buffer = mcfrs_chars_in_buffer, | |
1711 | .flush_buffer = mcfrs_flush_buffer, | |
1712 | .ioctl = mcfrs_ioctl, | |
1713 | .throttle = mcfrs_throttle, | |
1714 | .unthrottle = mcfrs_unthrottle, | |
1715 | .set_termios = mcfrs_set_termios, | |
1716 | .stop = mcfrs_stop, | |
1717 | .start = mcfrs_start, | |
1718 | .hangup = mcfrs_hangup, | |
1719 | .read_proc = mcfrs_readproc, | |
1720 | .wait_until_sent = mcfrs_wait_until_sent, | |
1721 | .tiocmget = mcfrs_tiocmget, | |
1722 | .tiocmset = mcfrs_tiocmset, | |
1723 | }; | |
1724 | ||
1725 | /* mcfrs_init inits the driver */ | |
1726 | static int __init | |
1727 | mcfrs_init(void) | |
1728 | { | |
1729 | struct mcf_serial *info; | |
1730 | unsigned long flags; | |
1731 | int i; | |
1732 | ||
1733 | /* Setup base handler, and timer table. */ | |
1734 | #ifdef MCFPP_DCD0 | |
1735 | init_timer(&mcfrs_timer_struct); | |
1736 | mcfrs_timer_struct.function = mcfrs_timer; | |
1737 | mcfrs_timer_struct.data = 0; | |
1738 | mcfrs_timer_struct.expires = jiffies + HZ/25; | |
1739 | add_timer(&mcfrs_timer_struct); | |
1740 | mcfrs_ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1); | |
1741 | #endif | |
1742 | mcfrs_serial_driver = alloc_tty_driver(NR_PORTS); | |
1743 | if (!mcfrs_serial_driver) | |
1744 | return -ENOMEM; | |
1745 | ||
1746 | show_serial_version(); | |
1747 | ||
1748 | /* Initialize the tty_driver structure */ | |
1749 | mcfrs_serial_driver->owner = THIS_MODULE; | |
1750 | mcfrs_serial_driver->name = "ttyS"; | |
a8b8d57c | 1751 | mcfrs_serial_driver->driver_name = "mcfserial"; |
1da177e4 LT |
1752 | mcfrs_serial_driver->major = TTY_MAJOR; |
1753 | mcfrs_serial_driver->minor_start = 64; | |
1754 | mcfrs_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1755 | mcfrs_serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
1756 | mcfrs_serial_driver->init_termios = tty_std_termios; | |
1757 | ||
1758 | mcfrs_serial_driver->init_termios.c_cflag = | |
1759 | mcfrs_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL; | |
1760 | mcfrs_serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
1761 | ||
1762 | tty_set_operations(mcfrs_serial_driver, &mcfrs_ops); | |
1763 | ||
1764 | if (tty_register_driver(mcfrs_serial_driver)) { | |
1765 | printk("MCFRS: Couldn't register serial driver\n"); | |
1766 | put_tty_driver(mcfrs_serial_driver); | |
1767 | return(-EBUSY); | |
1768 | } | |
1769 | ||
1770 | local_irq_save(flags); | |
1771 | ||
1772 | /* | |
1773 | * Configure all the attached serial ports. | |
1774 | */ | |
1775 | for (i = 0, info = mcfrs_table; (i < NR_PORTS); i++, info++) { | |
1776 | info->magic = SERIAL_MAGIC; | |
1777 | info->line = i; | |
1778 | info->tty = 0; | |
1779 | info->custom_divisor = 16; | |
1780 | info->close_delay = 50; | |
1781 | info->closing_wait = 3000; | |
1782 | info->x_char = 0; | |
1783 | info->event = 0; | |
1784 | info->count = 0; | |
1785 | info->blocked_open = 0; | |
1786 | INIT_WORK(&info->tqueue, mcfrs_offintr, info); | |
1787 | INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info); | |
1788 | init_waitqueue_head(&info->open_wait); | |
1789 | init_waitqueue_head(&info->close_wait); | |
1790 | ||
1791 | info->imr = 0; | |
1792 | mcfrs_setsignals(info, 0, 0); | |
1793 | mcfrs_irqinit(info); | |
1794 | ||
1795 | printk("ttyS%d at 0x%04x (irq = %d)", info->line, | |
1796 | (unsigned int) info->addr, info->irq); | |
1797 | printk(" is a builtin ColdFire UART\n"); | |
1798 | } | |
1799 | ||
1800 | local_irq_restore(flags); | |
1801 | return 0; | |
1802 | } | |
1803 | ||
1804 | module_init(mcfrs_init); | |
1805 | ||
1806 | /****************************************************************************/ | |
1807 | /* Serial Console */ | |
1808 | /****************************************************************************/ | |
1809 | ||
1810 | /* | |
1811 | * Quick and dirty UART initialization, for console output. | |
1812 | */ | |
1813 | ||
1814 | void mcfrs_init_console(void) | |
1815 | { | |
1816 | volatile unsigned char *uartp; | |
1817 | unsigned int clk; | |
1818 | ||
1819 | /* | |
1820 | * Reset UART, get it into known state... | |
1821 | */ | |
1822 | uartp = (volatile unsigned char *) (MCF_MBAR + | |
1823 | (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1)); | |
1824 | ||
1825 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
1826 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
1827 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */ | |
1828 | ||
1829 | /* | |
1830 | * Set port for defined baud , 8 data bits, 1 stop bit, no parity. | |
1831 | */ | |
1832 | uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8; | |
1833 | uartp[MCFUART_UMR] = MCFUART_MR2_STOP1; | |
1834 | ||
a8b8d57c GU |
1835 | #ifdef CONFIG_M5272 |
1836 | { | |
1837 | /* | |
1838 | * For the MCF5272, also compute the baudrate fraction. | |
1839 | */ | |
1840 | int fraction = MCF_BUSCLK - (clk * 32 * mcfrs_console_baud); | |
1841 | fraction *= 16; | |
1842 | fraction /= (32 * mcfrs_console_baud); | |
1843 | uartp[MCFUART_UFPD] = (fraction & 0xf); /* set fraction */ | |
1844 | clk = (MCF_BUSCLK / mcfrs_console_baud) / 32; | |
1845 | } | |
1846 | #else | |
1da177e4 | 1847 | clk = ((MCF_BUSCLK / mcfrs_console_baud) + 16) / 32; /* set baud */ |
a8b8d57c GU |
1848 | #endif |
1849 | ||
1da177e4 LT |
1850 | uartp[MCFUART_UBG1] = (clk & 0xff00) >> 8; /* set msb baud */ |
1851 | uartp[MCFUART_UBG2] = (clk & 0xff); /* set lsb baud */ | |
1da177e4 LT |
1852 | uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER; |
1853 | uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; | |
1854 | ||
1855 | mcfrs_console_inited++; | |
1856 | return; | |
1857 | } | |
1858 | ||
1859 | ||
1860 | /* | |
1861 | * Setup for console. Argument comes from the boot command line. | |
1862 | */ | |
1863 | ||
1864 | int mcfrs_console_setup(struct console *cp, char *arg) | |
1865 | { | |
1866 | int i, n = CONSOLE_BAUD_RATE; | |
1867 | ||
1868 | if (!cp) | |
1869 | return(-1); | |
1870 | ||
1871 | if (!strncmp(cp->name, "ttyS", 4)) | |
1872 | mcfrs_console_port = cp->index; | |
1873 | else if (!strncmp(cp->name, "cua", 3)) | |
1874 | mcfrs_console_port = cp->index; | |
1875 | else | |
1876 | return(-1); | |
1877 | ||
1878 | if (arg) | |
1879 | n = simple_strtoul(arg,NULL,0); | |
1880 | for (i = 0; i < MCFRS_BAUD_TABLE_SIZE; i++) | |
1881 | if (mcfrs_baud_table[i] == n) | |
1882 | break; | |
1883 | if (i < MCFRS_BAUD_TABLE_SIZE) { | |
1884 | mcfrs_console_baud = n; | |
1885 | mcfrs_console_cbaud = 0; | |
1886 | if (i > 15) { | |
1887 | mcfrs_console_cbaud |= CBAUDEX; | |
1888 | i -= 15; | |
1889 | } | |
1890 | mcfrs_console_cbaud |= i; | |
1891 | } | |
1892 | mcfrs_init_console(); /* make sure baud rate changes */ | |
1893 | return(0); | |
1894 | } | |
1895 | ||
1896 | ||
1897 | static struct tty_driver *mcfrs_console_device(struct console *c, int *index) | |
1898 | { | |
1899 | *index = c->index; | |
1900 | return mcfrs_serial_driver; | |
1901 | } | |
1902 | ||
1903 | ||
1904 | /* | |
1905 | * Output a single character, using UART polled mode. | |
1906 | * This is used for console output. | |
1907 | */ | |
1908 | ||
1909 | void mcfrs_put_char(char ch) | |
1910 | { | |
1911 | volatile unsigned char *uartp; | |
1912 | unsigned long flags; | |
1913 | int i; | |
1914 | ||
1915 | uartp = (volatile unsigned char *) (MCF_MBAR + | |
1916 | (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1)); | |
1917 | ||
1918 | local_irq_save(flags); | |
1919 | for (i = 0; (i < 0x10000); i++) { | |
1920 | if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY) | |
1921 | break; | |
1922 | } | |
1923 | if (i < 0x10000) { | |
1924 | uartp[MCFUART_UTB] = ch; | |
1925 | for (i = 0; (i < 0x10000); i++) | |
1926 | if (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY) | |
1927 | break; | |
1928 | } | |
1929 | if (i >= 0x10000) | |
1930 | mcfrs_init_console(); /* try and get it back */ | |
1931 | local_irq_restore(flags); | |
1932 | ||
1933 | return; | |
1934 | } | |
1935 | ||
1936 | ||
1937 | /* | |
1938 | * rs_console_write is registered for printk output. | |
1939 | */ | |
1940 | ||
1941 | void mcfrs_console_write(struct console *cp, const char *p, unsigned len) | |
1942 | { | |
1943 | if (!mcfrs_console_inited) | |
1944 | mcfrs_init_console(); | |
1945 | while (len-- > 0) { | |
1946 | if (*p == '\n') | |
1947 | mcfrs_put_char('\r'); | |
1948 | mcfrs_put_char(*p++); | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * declare our consoles | |
1954 | */ | |
1955 | ||
1956 | struct console mcfrs_console = { | |
1957 | .name = "ttyS", | |
1958 | .write = mcfrs_console_write, | |
1959 | .device = mcfrs_console_device, | |
1960 | .setup = mcfrs_console_setup, | |
1961 | .flags = CON_PRINTBUFFER, | |
1962 | .index = -1, | |
1963 | }; | |
1964 | ||
1965 | static int __init mcfrs_console_init(void) | |
1966 | { | |
1967 | register_console(&mcfrs_console); | |
1968 | return 0; | |
1969 | } | |
1970 | ||
1971 | console_initcall(mcfrs_console_init); | |
1972 | ||
1973 | /****************************************************************************/ |