Commit | Line | Data |
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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/delay.h> |
44 | #include <asm/coldfire.h> | |
45 | #include <asm/mcfsim.h> | |
46 | #include <asm/mcfuart.h> | |
47 | #include <asm/nettel.h> | |
48 | #include <asm/uaccess.h> | |
49 | #include "mcfserial.h" | |
50 | ||
51 | struct timer_list mcfrs_timer_struct; | |
52 | ||
53 | /* | |
54 | * Default console baud rate, we use this as the default | |
55 | * for all ports so init can just open /dev/console and | |
56 | * keep going. Perhaps one day the cflag settings for the | |
57 | * console can be used instead. | |
58 | */ | |
1da177e4 | 59 | #if defined(CONFIG_HW_FEITH) |
b0433b99 GU |
60 | #define CONSOLE_BAUD_RATE 38400 |
61 | #define DEFAULT_CBAUD B38400 | |
a8b8d57c GU |
62 | #elif defined(CONFIG_MOD5272) || defined(CONFIG_M5208EVB) || \ |
63 | defined(CONFIG_M5329EVB) || defined(CONFIG_GILBARCO) | |
b0433b99 GU |
64 | #define CONSOLE_BAUD_RATE 115200 |
65 | #define DEFAULT_CBAUD B115200 | |
a9cdffb1 | 66 | #elif defined(CONFIG_ARNEWSH) || defined(CONFIG_FREESCALE) || \ |
76aa698f | 67 | defined(CONFIG_senTec) || defined(CONFIG_SNEHA) || defined(CONFIG_AVNET) |
a9cdffb1 GU |
68 | #define CONSOLE_BAUD_RATE 19200 |
69 | #define DEFAULT_CBAUD B19200 | |
1da177e4 LT |
70 | #endif |
71 | ||
72 | #ifndef CONSOLE_BAUD_RATE | |
73 | #define CONSOLE_BAUD_RATE 9600 | |
74 | #define DEFAULT_CBAUD B9600 | |
75 | #endif | |
76 | ||
77 | int mcfrs_console_inited = 0; | |
78 | int mcfrs_console_port = -1; | |
79 | int mcfrs_console_baud = CONSOLE_BAUD_RATE; | |
80 | int mcfrs_console_cbaud = DEFAULT_CBAUD; | |
81 | ||
82 | /* | |
83 | * Driver data structures. | |
84 | */ | |
85 | static struct tty_driver *mcfrs_serial_driver; | |
86 | ||
87 | /* number of characters left in xmit buffer before we ask for more */ | |
88 | #define WAKEUP_CHARS 256 | |
89 | ||
90 | /* Debugging... | |
91 | */ | |
92 | #undef SERIAL_DEBUG_OPEN | |
93 | #undef SERIAL_DEBUG_FLOW | |
94 | ||
7f04d62b | 95 | #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
76aa698f | 96 | defined(CONFIG_M520x) || defined(CONFIG_M532x) |
1da177e4 LT |
97 | #define IRQBASE (MCFINT_VECBASE+MCFINT_UART0) |
98 | #else | |
99 | #define IRQBASE 73 | |
100 | #endif | |
101 | ||
102 | /* | |
103 | * Configuration table, UARTs to look for at startup. | |
104 | */ | |
105 | static struct mcf_serial mcfrs_table[] = { | |
106 | { /* ttyS0 */ | |
107 | .magic = 0, | |
108 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE1), | |
109 | .irq = IRQBASE, | |
110 | .flags = ASYNC_BOOT_AUTOCONF, | |
111 | }, | |
a8b8d57c | 112 | #ifdef MCFUART_BASE2 |
1da177e4 LT |
113 | { /* ttyS1 */ |
114 | .magic = 0, | |
115 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE2), | |
116 | .irq = IRQBASE+1, | |
117 | .flags = ASYNC_BOOT_AUTOCONF, | |
118 | }, | |
a8b8d57c GU |
119 | #endif |
120 | #ifdef MCFUART_BASE3 | |
121 | { /* ttyS2 */ | |
122 | .magic = 0, | |
123 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE3), | |
124 | .irq = IRQBASE+2, | |
125 | .flags = ASYNC_BOOT_AUTOCONF, | |
126 | }, | |
127 | #endif | |
128 | #ifdef MCFUART_BASE4 | |
129 | { /* ttyS3 */ | |
130 | .magic = 0, | |
131 | .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE4), | |
132 | .irq = IRQBASE+3, | |
133 | .flags = ASYNC_BOOT_AUTOCONF, | |
134 | }, | |
135 | #endif | |
1da177e4 LT |
136 | }; |
137 | ||
138 | ||
139 | #define NR_PORTS (sizeof(mcfrs_table) / sizeof(struct mcf_serial)) | |
140 | ||
141 | /* | |
142 | * This is used to figure out the divisor speeds and the timeouts. | |
143 | */ | |
144 | static int mcfrs_baud_table[] = { | |
145 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
146 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 | |
147 | }; | |
148 | #define MCFRS_BAUD_TABLE_SIZE \ | |
149 | (sizeof(mcfrs_baud_table)/sizeof(mcfrs_baud_table[0])) | |
150 | ||
151 | ||
152 | #ifdef CONFIG_MAGIC_SYSRQ | |
153 | /* | |
154 | * Magic system request keys. Used for debugging... | |
155 | */ | |
156 | extern int magic_sysrq_key(int ch); | |
157 | #endif | |
158 | ||
159 | ||
160 | /* | |
161 | * Forware declarations... | |
162 | */ | |
163 | static void mcfrs_change_speed(struct mcf_serial *info); | |
164 | static void mcfrs_wait_until_sent(struct tty_struct *tty, int timeout); | |
165 | ||
166 | ||
167 | static inline int serial_paranoia_check(struct mcf_serial *info, | |
168 | char *name, const char *routine) | |
169 | { | |
170 | #ifdef SERIAL_PARANOIA_CHECK | |
171 | static const char badmagic[] = | |
172 | "MCFRS(warning): bad magic number for serial struct %s in %s\n"; | |
173 | static const char badinfo[] = | |
174 | "MCFRS(warning): null mcf_serial for %s in %s\n"; | |
175 | ||
176 | if (!info) { | |
177 | printk(badinfo, name, routine); | |
178 | return 1; | |
179 | } | |
180 | if (info->magic != SERIAL_MAGIC) { | |
181 | printk(badmagic, name, routine); | |
182 | return 1; | |
183 | } | |
184 | #endif | |
185 | return 0; | |
186 | } | |
187 | ||
188 | /* | |
189 | * Sets or clears DTR and RTS on the requested line. | |
190 | */ | |
191 | static void mcfrs_setsignals(struct mcf_serial *info, int dtr, int rts) | |
192 | { | |
193 | volatile unsigned char *uartp; | |
194 | unsigned long flags; | |
195 | ||
196 | #if 0 | |
197 | printk("%s(%d): mcfrs_setsignals(info=%x,dtr=%d,rts=%d)\n", | |
198 | __FILE__, __LINE__, info, dtr, rts); | |
199 | #endif | |
200 | ||
201 | local_irq_save(flags); | |
202 | if (dtr >= 0) { | |
203 | #ifdef MCFPP_DTR0 | |
204 | if (info->line) | |
205 | mcf_setppdata(MCFPP_DTR1, (dtr ? 0 : MCFPP_DTR1)); | |
206 | else | |
207 | mcf_setppdata(MCFPP_DTR0, (dtr ? 0 : MCFPP_DTR0)); | |
208 | #endif | |
209 | } | |
210 | if (rts >= 0) { | |
211 | uartp = info->addr; | |
212 | if (rts) { | |
213 | info->sigs |= TIOCM_RTS; | |
214 | uartp[MCFUART_UOP1] = MCFUART_UOP_RTS; | |
215 | } else { | |
216 | info->sigs &= ~TIOCM_RTS; | |
217 | uartp[MCFUART_UOP0] = MCFUART_UOP_RTS; | |
218 | } | |
219 | } | |
220 | local_irq_restore(flags); | |
221 | return; | |
222 | } | |
223 | ||
224 | /* | |
225 | * Gets values of serial signals. | |
226 | */ | |
227 | static int mcfrs_getsignals(struct mcf_serial *info) | |
228 | { | |
229 | volatile unsigned char *uartp; | |
230 | unsigned long flags; | |
231 | int sigs; | |
232 | #if defined(CONFIG_NETtel) && defined(CONFIG_M5307) | |
233 | unsigned short ppdata; | |
234 | #endif | |
235 | ||
236 | #if 0 | |
237 | printk("%s(%d): mcfrs_getsignals(info=%x)\n", __FILE__, __LINE__); | |
238 | #endif | |
239 | ||
240 | local_irq_save(flags); | |
241 | uartp = info->addr; | |
242 | sigs = (uartp[MCFUART_UIPR] & MCFUART_UIPR_CTS) ? 0 : TIOCM_CTS; | |
243 | sigs |= (info->sigs & TIOCM_RTS); | |
244 | ||
245 | #ifdef MCFPP_DCD0 | |
246 | { | |
247 | unsigned int ppdata; | |
248 | ppdata = mcf_getppdata(); | |
249 | if (info->line == 0) { | |
250 | sigs |= (ppdata & MCFPP_DCD0) ? 0 : TIOCM_CD; | |
251 | sigs |= (ppdata & MCFPP_DTR0) ? 0 : TIOCM_DTR; | |
252 | } else if (info->line == 1) { | |
253 | sigs |= (ppdata & MCFPP_DCD1) ? 0 : TIOCM_CD; | |
254 | sigs |= (ppdata & MCFPP_DTR1) ? 0 : TIOCM_DTR; | |
255 | } | |
256 | } | |
257 | #endif | |
258 | ||
259 | local_irq_restore(flags); | |
260 | return(sigs); | |
261 | } | |
262 | ||
263 | /* | |
264 | * ------------------------------------------------------------ | |
265 | * mcfrs_stop() and mcfrs_start() | |
266 | * | |
267 | * This routines are called before setting or resetting tty->stopped. | |
268 | * They enable or disable transmitter interrupts, as necessary. | |
269 | * ------------------------------------------------------------ | |
270 | */ | |
271 | static void mcfrs_stop(struct tty_struct *tty) | |
272 | { | |
273 | volatile unsigned char *uartp; | |
274 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
275 | unsigned long flags; | |
276 | ||
277 | if (serial_paranoia_check(info, tty->name, "mcfrs_stop")) | |
278 | return; | |
279 | ||
280 | local_irq_save(flags); | |
281 | uartp = info->addr; | |
282 | info->imr &= ~MCFUART_UIR_TXREADY; | |
283 | uartp[MCFUART_UIMR] = info->imr; | |
284 | local_irq_restore(flags); | |
285 | } | |
286 | ||
287 | static void mcfrs_start(struct tty_struct *tty) | |
288 | { | |
289 | volatile unsigned char *uartp; | |
290 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
291 | unsigned long flags; | |
292 | ||
293 | if (serial_paranoia_check(info, tty->name, "mcfrs_start")) | |
294 | return; | |
295 | ||
296 | local_irq_save(flags); | |
297 | if (info->xmit_cnt && info->xmit_buf) { | |
298 | uartp = info->addr; | |
299 | info->imr |= MCFUART_UIR_TXREADY; | |
300 | uartp[MCFUART_UIMR] = info->imr; | |
301 | } | |
302 | local_irq_restore(flags); | |
303 | } | |
304 | ||
305 | /* | |
306 | * ---------------------------------------------------------------------- | |
307 | * | |
308 | * Here starts the interrupt handling routines. All of the following | |
309 | * subroutines are declared as inline and are folded into | |
310 | * mcfrs_interrupt(). They were separated out for readability's sake. | |
311 | * | |
312 | * Note: mcfrs_interrupt() is a "fast" interrupt, which means that it | |
313 | * runs with interrupts turned off. People who may want to modify | |
314 | * mcfrs_interrupt() should try to keep the interrupt handler as fast as | |
315 | * possible. After you are done making modifications, it is not a bad | |
316 | * idea to do: | |
317 | * | |
318 | * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c | |
319 | * | |
320 | * and look at the resulting assemble code in serial.s. | |
321 | * | |
322 | * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 | |
323 | * ----------------------------------------------------------------------- | |
324 | */ | |
325 | ||
326 | static inline void receive_chars(struct mcf_serial *info) | |
327 | { | |
328 | volatile unsigned char *uartp; | |
329 | struct tty_struct *tty = info->tty; | |
33f0f88f | 330 | unsigned char status, ch, flag; |
1da177e4 LT |
331 | |
332 | if (!tty) | |
333 | return; | |
334 | ||
335 | uartp = info->addr; | |
336 | ||
337 | while ((status = uartp[MCFUART_USR]) & MCFUART_USR_RXREADY) { | |
1da177e4 LT |
338 | ch = uartp[MCFUART_URB]; |
339 | info->stats.rx++; | |
340 | ||
341 | #ifdef CONFIG_MAGIC_SYSRQ | |
342 | if (mcfrs_console_inited && (info->line == mcfrs_console_port)) { | |
343 | if (magic_sysrq_key(ch)) | |
344 | continue; | |
345 | } | |
346 | #endif | |
347 | ||
33f0f88f | 348 | flag = TTY_NORMAL; |
1da177e4 LT |
349 | if (status & MCFUART_USR_RXERR) { |
350 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; | |
351 | if (status & MCFUART_USR_RXBREAK) { | |
352 | info->stats.rxbreak++; | |
33f0f88f | 353 | flag = TTY_BREAK; |
1da177e4 LT |
354 | } else if (status & MCFUART_USR_RXPARITY) { |
355 | info->stats.rxparity++; | |
33f0f88f | 356 | flag = TTY_PARITY; |
1da177e4 LT |
357 | } else if (status & MCFUART_USR_RXOVERRUN) { |
358 | info->stats.rxoverrun++; | |
33f0f88f | 359 | flag = TTY_OVERRUN; |
1da177e4 LT |
360 | } else if (status & MCFUART_USR_RXFRAMING) { |
361 | info->stats.rxframing++; | |
33f0f88f | 362 | flag = TTY_FRAME; |
1da177e4 | 363 | } |
1da177e4 | 364 | } |
33f0f88f | 365 | tty_insert_flip_char(tty, ch, flag); |
1da177e4 | 366 | } |
a9cdffb1 | 367 | tty_schedule_flip(tty); |
1da177e4 LT |
368 | return; |
369 | } | |
370 | ||
371 | static inline void transmit_chars(struct mcf_serial *info) | |
372 | { | |
373 | volatile unsigned char *uartp; | |
374 | ||
375 | uartp = info->addr; | |
376 | ||
377 | if (info->x_char) { | |
378 | /* Send special char - probably flow control */ | |
379 | uartp[MCFUART_UTB] = info->x_char; | |
380 | info->x_char = 0; | |
381 | info->stats.tx++; | |
382 | } | |
383 | ||
384 | if ((info->xmit_cnt <= 0) || info->tty->stopped) { | |
385 | info->imr &= ~MCFUART_UIR_TXREADY; | |
386 | uartp[MCFUART_UIMR] = info->imr; | |
387 | return; | |
388 | } | |
389 | ||
390 | while (uartp[MCFUART_USR] & MCFUART_USR_TXREADY) { | |
391 | uartp[MCFUART_UTB] = info->xmit_buf[info->xmit_tail++]; | |
392 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
393 | info->stats.tx++; | |
394 | if (--info->xmit_cnt <= 0) | |
395 | break; | |
396 | } | |
397 | ||
398 | if (info->xmit_cnt < WAKEUP_CHARS) | |
399 | schedule_work(&info->tqueue); | |
400 | return; | |
401 | } | |
402 | ||
403 | /* | |
404 | * This is the serial driver's generic interrupt routine | |
405 | */ | |
7d12e780 | 406 | irqreturn_t mcfrs_interrupt(int irq, void *dev_id) |
1da177e4 LT |
407 | { |
408 | struct mcf_serial *info; | |
409 | unsigned char isr; | |
410 | ||
411 | info = &mcfrs_table[(irq - IRQBASE)]; | |
412 | isr = info->addr[MCFUART_UISR] & info->imr; | |
413 | ||
414 | if (isr & MCFUART_UIR_RXREADY) | |
415 | receive_chars(info); | |
416 | if (isr & MCFUART_UIR_TXREADY) | |
417 | transmit_chars(info); | |
418 | return IRQ_HANDLED; | |
419 | } | |
420 | ||
421 | /* | |
422 | * ------------------------------------------------------------------- | |
423 | * Here ends the serial interrupt routines. | |
424 | * ------------------------------------------------------------------- | |
425 | */ | |
426 | ||
28580df0 | 427 | static void mcfrs_offintr(struct work_struct *work) |
1da177e4 | 428 | { |
28580df0 GU |
429 | struct mcf_serial *info = container_of(work, struct mcf_serial, tqueue); |
430 | struct tty_struct *tty = info->tty; | |
1da177e4 | 431 | |
28580df0 GU |
432 | if (tty) |
433 | tty_wakeup(tty); | |
1da177e4 LT |
434 | } |
435 | ||
436 | ||
437 | /* | |
438 | * Change of state on a DCD line. | |
439 | */ | |
440 | void mcfrs_modem_change(struct mcf_serial *info, int dcd) | |
441 | { | |
442 | if (info->count == 0) | |
443 | return; | |
444 | ||
445 | if (info->flags & ASYNC_CHECK_CD) { | |
446 | if (dcd) | |
447 | wake_up_interruptible(&info->open_wait); | |
448 | else | |
449 | schedule_work(&info->tqueue_hangup); | |
450 | } | |
451 | } | |
452 | ||
453 | ||
454 | #ifdef MCFPP_DCD0 | |
455 | ||
456 | unsigned short mcfrs_ppstatus; | |
457 | ||
458 | /* | |
459 | * This subroutine is called when the RS_TIMER goes off. It is used | |
460 | * to monitor the state of the DCD lines - since they have no edge | |
461 | * sensors and interrupt generators. | |
462 | */ | |
463 | static void mcfrs_timer(void) | |
464 | { | |
465 | unsigned int ppstatus, dcdval, i; | |
466 | ||
467 | ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1); | |
468 | ||
469 | if (ppstatus != mcfrs_ppstatus) { | |
470 | for (i = 0; (i < 2); i++) { | |
471 | dcdval = (i ? MCFPP_DCD1 : MCFPP_DCD0); | |
472 | if ((ppstatus & dcdval) != (mcfrs_ppstatus & dcdval)) { | |
473 | mcfrs_modem_change(&mcfrs_table[i], | |
474 | ((ppstatus & dcdval) ? 0 : 1)); | |
475 | } | |
476 | } | |
477 | } | |
478 | mcfrs_ppstatus = ppstatus; | |
479 | ||
480 | /* Re-arm timer */ | |
481 | mcfrs_timer_struct.expires = jiffies + HZ/25; | |
482 | add_timer(&mcfrs_timer_struct); | |
483 | } | |
484 | ||
485 | #endif /* MCFPP_DCD0 */ | |
486 | ||
487 | ||
488 | /* | |
489 | * This routine is called from the scheduler tqueue when the interrupt | |
490 | * routine has signalled that a hangup has occurred. The path of | |
491 | * hangup processing is: | |
492 | * | |
493 | * serial interrupt routine -> (scheduler tqueue) -> | |
494 | * do_serial_hangup() -> tty->hangup() -> mcfrs_hangup() | |
495 | * | |
496 | */ | |
28580df0 | 497 | static void do_serial_hangup(struct work_struct *work) |
1da177e4 | 498 | { |
28580df0 GU |
499 | struct mcf_serial *info = container_of(work, struct mcf_serial, tqueue_hangup); |
500 | struct tty_struct *tty = info->tty; | |
1da177e4 | 501 | |
28580df0 GU |
502 | if (tty) |
503 | tty_hangup(tty); | |
1da177e4 LT |
504 | } |
505 | ||
506 | static int startup(struct mcf_serial * info) | |
507 | { | |
508 | volatile unsigned char *uartp; | |
509 | unsigned long flags; | |
510 | ||
511 | if (info->flags & ASYNC_INITIALIZED) | |
512 | return 0; | |
513 | ||
514 | if (!info->xmit_buf) { | |
515 | info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL); | |
516 | if (!info->xmit_buf) | |
517 | return -ENOMEM; | |
518 | } | |
519 | ||
520 | local_irq_save(flags); | |
521 | ||
522 | #ifdef SERIAL_DEBUG_OPEN | |
523 | printk("starting up ttyS%d (irq %d)...\n", info->line, info->irq); | |
524 | #endif | |
525 | ||
526 | /* | |
527 | * Reset UART, get it into known state... | |
528 | */ | |
529 | uartp = info->addr; | |
530 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
531 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
532 | mcfrs_setsignals(info, 1, 1); | |
533 | ||
534 | if (info->tty) | |
535 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
536 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
537 | ||
538 | /* | |
539 | * and set the speed of the serial port | |
540 | */ | |
541 | mcfrs_change_speed(info); | |
542 | ||
543 | /* | |
544 | * Lastly enable the UART transmitter and receiver, and | |
545 | * interrupt enables. | |
546 | */ | |
547 | info->imr = MCFUART_UIR_RXREADY; | |
548 | uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; | |
549 | uartp[MCFUART_UIMR] = info->imr; | |
550 | ||
551 | info->flags |= ASYNC_INITIALIZED; | |
552 | local_irq_restore(flags); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* | |
557 | * This routine will shutdown a serial port; interrupts are disabled, and | |
558 | * DTR is dropped if the hangup on close termio flag is on. | |
559 | */ | |
560 | static void shutdown(struct mcf_serial * info) | |
561 | { | |
562 | volatile unsigned char *uartp; | |
563 | unsigned long flags; | |
564 | ||
565 | if (!(info->flags & ASYNC_INITIALIZED)) | |
566 | return; | |
567 | ||
568 | #ifdef SERIAL_DEBUG_OPEN | |
569 | printk("Shutting down serial port %d (irq %d)....\n", info->line, | |
570 | info->irq); | |
571 | #endif | |
572 | ||
573 | local_irq_save(flags); | |
574 | ||
575 | uartp = info->addr; | |
576 | uartp[MCFUART_UIMR] = 0; /* mask all interrupts */ | |
577 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
578 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
579 | ||
580 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) | |
581 | mcfrs_setsignals(info, 0, 0); | |
582 | ||
583 | if (info->xmit_buf) { | |
584 | free_page((unsigned long) info->xmit_buf); | |
585 | info->xmit_buf = 0; | |
586 | } | |
587 | ||
588 | if (info->tty) | |
589 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
590 | ||
591 | info->flags &= ~ASYNC_INITIALIZED; | |
592 | local_irq_restore(flags); | |
593 | } | |
594 | ||
595 | ||
596 | /* | |
597 | * This routine is called to set the UART divisor registers to match | |
598 | * the specified baud rate for a serial port. | |
599 | */ | |
600 | static void mcfrs_change_speed(struct mcf_serial *info) | |
601 | { | |
602 | volatile unsigned char *uartp; | |
603 | unsigned int baudclk, cflag; | |
604 | unsigned long flags; | |
605 | unsigned char mr1, mr2; | |
606 | int i; | |
607 | #ifdef CONFIG_M5272 | |
608 | unsigned int fraction; | |
609 | #endif | |
610 | ||
611 | if (!info->tty || !info->tty->termios) | |
612 | return; | |
613 | cflag = info->tty->termios->c_cflag; | |
614 | if (info->addr == 0) | |
615 | return; | |
616 | ||
617 | #if 0 | |
618 | printk("%s(%d): mcfrs_change_speed()\n", __FILE__, __LINE__); | |
619 | #endif | |
620 | ||
621 | i = cflag & CBAUD; | |
622 | if (i & CBAUDEX) { | |
623 | i &= ~CBAUDEX; | |
624 | if (i < 1 || i > 4) | |
625 | info->tty->termios->c_cflag &= ~CBAUDEX; | |
626 | else | |
627 | i += 15; | |
628 | } | |
629 | if (i == 0) { | |
630 | mcfrs_setsignals(info, 0, -1); | |
631 | return; | |
632 | } | |
633 | ||
634 | /* compute the baudrate clock */ | |
635 | #ifdef CONFIG_M5272 | |
636 | /* | |
637 | * For the MCF5272, also compute the baudrate fraction. | |
638 | */ | |
639 | baudclk = (MCF_BUSCLK / mcfrs_baud_table[i]) / 32; | |
640 | fraction = MCF_BUSCLK - (baudclk * 32 * mcfrs_baud_table[i]); | |
641 | fraction *= 16; | |
642 | fraction /= (32 * mcfrs_baud_table[i]); | |
643 | #else | |
644 | baudclk = ((MCF_BUSCLK / mcfrs_baud_table[i]) + 16) / 32; | |
645 | #endif | |
646 | ||
647 | info->baud = mcfrs_baud_table[i]; | |
648 | ||
649 | mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR; | |
650 | mr2 = 0; | |
651 | ||
652 | switch (cflag & CSIZE) { | |
653 | case CS5: mr1 |= MCFUART_MR1_CS5; break; | |
654 | case CS6: mr1 |= MCFUART_MR1_CS6; break; | |
655 | case CS7: mr1 |= MCFUART_MR1_CS7; break; | |
656 | case CS8: | |
657 | default: mr1 |= MCFUART_MR1_CS8; break; | |
658 | } | |
659 | ||
660 | if (cflag & PARENB) { | |
661 | if (cflag & CMSPAR) { | |
662 | if (cflag & PARODD) | |
663 | mr1 |= MCFUART_MR1_PARITYMARK; | |
664 | else | |
665 | mr1 |= MCFUART_MR1_PARITYSPACE; | |
666 | } else { | |
667 | if (cflag & PARODD) | |
668 | mr1 |= MCFUART_MR1_PARITYODD; | |
669 | else | |
670 | mr1 |= MCFUART_MR1_PARITYEVEN; | |
671 | } | |
672 | } else { | |
673 | mr1 |= MCFUART_MR1_PARITYNONE; | |
674 | } | |
675 | ||
676 | if (cflag & CSTOPB) | |
677 | mr2 |= MCFUART_MR2_STOP2; | |
678 | else | |
679 | mr2 |= MCFUART_MR2_STOP1; | |
680 | ||
681 | if (cflag & CRTSCTS) { | |
682 | mr1 |= MCFUART_MR1_RXRTS; | |
683 | mr2 |= MCFUART_MR2_TXCTS; | |
684 | } | |
685 | ||
686 | if (cflag & CLOCAL) | |
687 | info->flags &= ~ASYNC_CHECK_CD; | |
688 | else | |
689 | info->flags |= ASYNC_CHECK_CD; | |
690 | ||
691 | uartp = info->addr; | |
692 | ||
693 | local_irq_save(flags); | |
694 | #if 0 | |
695 | printk("%s(%d): mr1=%x mr2=%x baudclk=%x\n", __FILE__, __LINE__, | |
696 | mr1, mr2, baudclk); | |
697 | #endif | |
698 | /* | |
699 | Note: pg 12-16 of MCF5206e User's Manual states that a | |
700 | software reset should be performed prior to changing | |
701 | UMR1,2, UCSR, UACR, bit 7 | |
702 | */ | |
703 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
704 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
705 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */ | |
706 | uartp[MCFUART_UMR] = mr1; | |
707 | uartp[MCFUART_UMR] = mr2; | |
708 | uartp[MCFUART_UBG1] = (baudclk & 0xff00) >> 8; /* set msb byte */ | |
709 | uartp[MCFUART_UBG2] = (baudclk & 0xff); /* set lsb byte */ | |
710 | #ifdef CONFIG_M5272 | |
711 | uartp[MCFUART_UFPD] = (fraction & 0xf); /* set fraction */ | |
712 | #endif | |
713 | uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER; | |
714 | uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; | |
715 | mcfrs_setsignals(info, 1, -1); | |
716 | local_irq_restore(flags); | |
717 | return; | |
718 | } | |
719 | ||
720 | static void mcfrs_flush_chars(struct tty_struct *tty) | |
721 | { | |
722 | volatile unsigned char *uartp; | |
723 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
724 | unsigned long flags; | |
725 | ||
726 | if (serial_paranoia_check(info, tty->name, "mcfrs_flush_chars")) | |
727 | return; | |
728 | ||
729 | uartp = (volatile unsigned char *) info->addr; | |
730 | ||
731 | /* | |
732 | * re-enable receiver interrupt | |
733 | */ | |
734 | local_irq_save(flags); | |
735 | if ((!(info->imr & MCFUART_UIR_RXREADY)) && | |
736 | (info->flags & ASYNC_INITIALIZED) ) { | |
737 | info->imr |= MCFUART_UIR_RXREADY; | |
738 | uartp[MCFUART_UIMR] = info->imr; | |
739 | } | |
740 | local_irq_restore(flags); | |
741 | ||
742 | if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
743 | !info->xmit_buf) | |
744 | return; | |
745 | ||
746 | /* Enable transmitter */ | |
747 | local_irq_save(flags); | |
748 | info->imr |= MCFUART_UIR_TXREADY; | |
749 | uartp[MCFUART_UIMR] = info->imr; | |
750 | local_irq_restore(flags); | |
751 | } | |
752 | ||
753 | static int mcfrs_write(struct tty_struct * tty, | |
754 | const unsigned char *buf, int count) | |
755 | { | |
756 | volatile unsigned char *uartp; | |
757 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
758 | unsigned long flags; | |
759 | int c, total = 0; | |
760 | ||
761 | #if 0 | |
762 | printk("%s(%d): mcfrs_write(tty=%x,buf=%x,count=%d)\n", | |
763 | __FILE__, __LINE__, (int)tty, (int)buf, count); | |
764 | #endif | |
765 | ||
766 | if (serial_paranoia_check(info, tty->name, "mcfrs_write")) | |
767 | return 0; | |
768 | ||
769 | if (!tty || !info->xmit_buf) | |
770 | return 0; | |
771 | ||
772 | local_save_flags(flags); | |
773 | while (1) { | |
774 | local_irq_disable(); | |
775 | c = min(count, (int) min(((int)SERIAL_XMIT_SIZE) - info->xmit_cnt - 1, | |
776 | ((int)SERIAL_XMIT_SIZE) - info->xmit_head)); | |
777 | local_irq_restore(flags); | |
778 | ||
779 | if (c <= 0) | |
780 | break; | |
781 | ||
782 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
783 | ||
784 | local_irq_disable(); | |
785 | info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
786 | info->xmit_cnt += c; | |
787 | local_irq_restore(flags); | |
788 | ||
789 | buf += c; | |
790 | count -= c; | |
791 | total += c; | |
792 | } | |
793 | ||
794 | local_irq_disable(); | |
795 | uartp = info->addr; | |
796 | info->imr |= MCFUART_UIR_TXREADY; | |
797 | uartp[MCFUART_UIMR] = info->imr; | |
798 | local_irq_restore(flags); | |
799 | ||
800 | return total; | |
801 | } | |
802 | ||
803 | static int mcfrs_write_room(struct tty_struct *tty) | |
804 | { | |
805 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
806 | int ret; | |
807 | ||
808 | if (serial_paranoia_check(info, tty->name, "mcfrs_write_room")) | |
809 | return 0; | |
810 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
811 | if (ret < 0) | |
812 | ret = 0; | |
813 | return ret; | |
814 | } | |
815 | ||
816 | static int mcfrs_chars_in_buffer(struct tty_struct *tty) | |
817 | { | |
818 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
819 | ||
820 | if (serial_paranoia_check(info, tty->name, "mcfrs_chars_in_buffer")) | |
821 | return 0; | |
822 | return info->xmit_cnt; | |
823 | } | |
824 | ||
825 | static void mcfrs_flush_buffer(struct tty_struct *tty) | |
826 | { | |
827 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
828 | unsigned long flags; | |
829 | ||
830 | if (serial_paranoia_check(info, tty->name, "mcfrs_flush_buffer")) | |
831 | return; | |
832 | ||
833 | local_irq_save(flags); | |
834 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
835 | local_irq_restore(flags); | |
836 | ||
837 | tty_wakeup(tty); | |
838 | } | |
839 | ||
840 | /* | |
841 | * ------------------------------------------------------------ | |
842 | * mcfrs_throttle() | |
843 | * | |
844 | * This routine is called by the upper-layer tty layer to signal that | |
845 | * incoming characters should be throttled. | |
846 | * ------------------------------------------------------------ | |
847 | */ | |
848 | static void mcfrs_throttle(struct tty_struct * tty) | |
849 | { | |
850 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
851 | #ifdef SERIAL_DEBUG_THROTTLE | |
852 | char buf[64]; | |
853 | ||
28580df0 | 854 | printk("throttle %s: %d....\n", tty_name(tty, buf), |
1da177e4 LT |
855 | tty->ldisc.chars_in_buffer(tty)); |
856 | #endif | |
857 | ||
858 | if (serial_paranoia_check(info, tty->name, "mcfrs_throttle")) | |
859 | return; | |
860 | ||
861 | if (I_IXOFF(tty)) | |
862 | info->x_char = STOP_CHAR(tty); | |
863 | ||
864 | /* Turn off RTS line (do this atomic) */ | |
865 | } | |
866 | ||
867 | static void mcfrs_unthrottle(struct tty_struct * tty) | |
868 | { | |
869 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
870 | #ifdef SERIAL_DEBUG_THROTTLE | |
871 | char buf[64]; | |
872 | ||
28580df0 | 873 | printk("unthrottle %s: %d....\n", tty_name(tty, buf), |
1da177e4 LT |
874 | tty->ldisc.chars_in_buffer(tty)); |
875 | #endif | |
876 | ||
877 | if (serial_paranoia_check(info, tty->name, "mcfrs_unthrottle")) | |
878 | return; | |
879 | ||
880 | if (I_IXOFF(tty)) { | |
881 | if (info->x_char) | |
882 | info->x_char = 0; | |
883 | else | |
884 | info->x_char = START_CHAR(tty); | |
885 | } | |
886 | ||
887 | /* Assert RTS line (do this atomic) */ | |
888 | } | |
889 | ||
890 | /* | |
891 | * ------------------------------------------------------------ | |
892 | * mcfrs_ioctl() and friends | |
893 | * ------------------------------------------------------------ | |
894 | */ | |
895 | ||
896 | static int get_serial_info(struct mcf_serial * info, | |
897 | struct serial_struct * retinfo) | |
898 | { | |
899 | struct serial_struct tmp; | |
900 | ||
901 | if (!retinfo) | |
902 | return -EFAULT; | |
903 | memset(&tmp, 0, sizeof(tmp)); | |
904 | tmp.type = info->type; | |
905 | tmp.line = info->line; | |
906 | tmp.port = (unsigned int) info->addr; | |
907 | tmp.irq = info->irq; | |
908 | tmp.flags = info->flags; | |
909 | tmp.baud_base = info->baud_base; | |
910 | tmp.close_delay = info->close_delay; | |
911 | tmp.closing_wait = info->closing_wait; | |
912 | tmp.custom_divisor = info->custom_divisor; | |
913 | return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0; | |
914 | } | |
915 | ||
916 | static int set_serial_info(struct mcf_serial * info, | |
917 | struct serial_struct * new_info) | |
918 | { | |
919 | struct serial_struct new_serial; | |
920 | struct mcf_serial old_info; | |
921 | int retval = 0; | |
922 | ||
923 | if (!new_info) | |
924 | return -EFAULT; | |
925 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) | |
926 | return -EFAULT; | |
927 | old_info = *info; | |
928 | ||
929 | if (!capable(CAP_SYS_ADMIN)) { | |
930 | if ((new_serial.baud_base != info->baud_base) || | |
931 | (new_serial.type != info->type) || | |
932 | (new_serial.close_delay != info->close_delay) || | |
933 | ((new_serial.flags & ~ASYNC_USR_MASK) != | |
934 | (info->flags & ~ASYNC_USR_MASK))) | |
935 | return -EPERM; | |
936 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | | |
937 | (new_serial.flags & ASYNC_USR_MASK)); | |
938 | info->custom_divisor = new_serial.custom_divisor; | |
939 | goto check_and_exit; | |
940 | } | |
941 | ||
942 | if (info->count > 1) | |
943 | return -EBUSY; | |
944 | ||
945 | /* | |
946 | * OK, past this point, all the error checking has been done. | |
947 | * At this point, we start making changes..... | |
948 | */ | |
949 | ||
950 | info->baud_base = new_serial.baud_base; | |
951 | info->flags = ((info->flags & ~ASYNC_FLAGS) | | |
952 | (new_serial.flags & ASYNC_FLAGS)); | |
953 | info->type = new_serial.type; | |
954 | info->close_delay = new_serial.close_delay; | |
955 | info->closing_wait = new_serial.closing_wait; | |
956 | ||
957 | check_and_exit: | |
958 | retval = startup(info); | |
959 | return retval; | |
960 | } | |
961 | ||
962 | /* | |
963 | * get_lsr_info - get line status register info | |
964 | * | |
965 | * Purpose: Let user call ioctl() to get info when the UART physically | |
966 | * is emptied. On bus types like RS485, the transmitter must | |
967 | * release the bus after transmitting. This must be done when | |
968 | * the transmit shift register is empty, not be done when the | |
969 | * transmit holding register is empty. This functionality | |
970 | * allows an RS485 driver to be written in user space. | |
971 | */ | |
972 | static int get_lsr_info(struct mcf_serial * info, unsigned int *value) | |
973 | { | |
974 | volatile unsigned char *uartp; | |
975 | unsigned long flags; | |
976 | unsigned char status; | |
977 | ||
978 | local_irq_save(flags); | |
979 | uartp = info->addr; | |
980 | status = (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY) ? TIOCSER_TEMT : 0; | |
981 | local_irq_restore(flags); | |
982 | ||
983 | return put_user(status,value); | |
984 | } | |
985 | ||
986 | /* | |
987 | * This routine sends a break character out the serial port. | |
988 | */ | |
989 | static void send_break( struct mcf_serial * info, int duration) | |
990 | { | |
991 | volatile unsigned char *uartp; | |
992 | unsigned long flags; | |
993 | ||
994 | if (!info->addr) | |
995 | return; | |
996 | set_current_state(TASK_INTERRUPTIBLE); | |
997 | uartp = info->addr; | |
998 | ||
999 | local_irq_save(flags); | |
1000 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTART; | |
1001 | schedule_timeout(duration); | |
1002 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTOP; | |
1003 | local_irq_restore(flags); | |
1004 | } | |
1005 | ||
1006 | static int mcfrs_tiocmget(struct tty_struct *tty, struct file *file) | |
1007 | { | |
1008 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1009 | ||
1010 | if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl")) | |
1011 | return -ENODEV; | |
1012 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1013 | return -EIO; | |
1014 | ||
1015 | return mcfrs_getsignals(info); | |
1016 | } | |
1017 | ||
1018 | static int mcfrs_tiocmset(struct tty_struct *tty, struct file *file, | |
1019 | unsigned int set, unsigned int clear) | |
1020 | { | |
1021 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1022 | int rts = -1, dtr = -1; | |
1023 | ||
1024 | if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl")) | |
1025 | return -ENODEV; | |
1026 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1027 | return -EIO; | |
1028 | ||
1029 | if (set & TIOCM_RTS) | |
1030 | rts = 1; | |
1031 | if (set & TIOCM_DTR) | |
1032 | dtr = 1; | |
1033 | if (clear & TIOCM_RTS) | |
1034 | rts = 0; | |
1035 | if (clear & TIOCM_DTR) | |
1036 | dtr = 0; | |
1037 | ||
1038 | mcfrs_setsignals(info, dtr, rts); | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static int mcfrs_ioctl(struct tty_struct *tty, struct file * file, | |
1044 | unsigned int cmd, unsigned long arg) | |
1045 | { | |
1046 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1047 | int retval, error; | |
1048 | ||
1049 | if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl")) | |
1050 | return -ENODEV; | |
1051 | ||
1052 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1053 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && | |
1054 | (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) { | |
1055 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1056 | return -EIO; | |
1057 | } | |
1058 | ||
1059 | switch (cmd) { | |
1060 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1061 | retval = tty_check_change(tty); | |
1062 | if (retval) | |
1063 | return retval; | |
1064 | tty_wait_until_sent(tty, 0); | |
1065 | if (!arg) | |
1066 | send_break(info, HZ/4); /* 1/4 second */ | |
1067 | return 0; | |
1068 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1069 | retval = tty_check_change(tty); | |
1070 | if (retval) | |
1071 | return retval; | |
1072 | tty_wait_until_sent(tty, 0); | |
1073 | send_break(info, arg ? arg*(HZ/10) : HZ/4); | |
1074 | return 0; | |
1075 | case TIOCGSOFTCAR: | |
1076 | error = put_user(C_CLOCAL(tty) ? 1 : 0, | |
1077 | (unsigned long *) arg); | |
1078 | if (error) | |
1079 | return error; | |
1080 | return 0; | |
1081 | case TIOCSSOFTCAR: | |
1082 | get_user(arg, (unsigned long *) arg); | |
1083 | tty->termios->c_cflag = | |
1084 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1085 | (arg ? CLOCAL : 0)); | |
1086 | return 0; | |
1087 | case TIOCGSERIAL: | |
1088 | if (access_ok(VERIFY_WRITE, (void *) arg, | |
1089 | sizeof(struct serial_struct))) | |
1090 | return get_serial_info(info, | |
1091 | (struct serial_struct *) arg); | |
1092 | return -EFAULT; | |
1093 | case TIOCSSERIAL: | |
1094 | return set_serial_info(info, | |
1095 | (struct serial_struct *) arg); | |
1096 | case TIOCSERGETLSR: /* Get line status register */ | |
1097 | if (access_ok(VERIFY_WRITE, (void *) arg, | |
1098 | sizeof(unsigned int))) | |
1099 | return get_lsr_info(info, (unsigned int *) arg); | |
1100 | return -EFAULT; | |
1101 | case TIOCSERGSTRUCT: | |
1102 | error = copy_to_user((struct mcf_serial *) arg, | |
1103 | info, sizeof(struct mcf_serial)); | |
1104 | if (error) | |
1105 | return -EFAULT; | |
1106 | return 0; | |
1107 | ||
1108 | #ifdef TIOCSET422 | |
1109 | case TIOCSET422: { | |
1110 | unsigned int val; | |
1111 | get_user(val, (unsigned int *) arg); | |
1112 | mcf_setpa(MCFPP_PA11, (val ? 0 : MCFPP_PA11)); | |
1113 | break; | |
1114 | } | |
1115 | case TIOCGET422: { | |
1116 | unsigned int val; | |
1117 | val = (mcf_getpa() & MCFPP_PA11) ? 0 : 1; | |
1118 | put_user(val, (unsigned int *) arg); | |
1119 | break; | |
1120 | } | |
1121 | #endif | |
1122 | ||
1123 | default: | |
1124 | return -ENOIOCTLCMD; | |
1125 | } | |
1126 | return 0; | |
1127 | } | |
1128 | ||
606d099c | 1129 | static void mcfrs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
1130 | { |
1131 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
1132 | ||
1133 | if (tty->termios->c_cflag == old_termios->c_cflag) | |
1134 | return; | |
1135 | ||
1136 | mcfrs_change_speed(info); | |
1137 | ||
1138 | if ((old_termios->c_cflag & CRTSCTS) && | |
1139 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1140 | tty->hw_stopped = 0; | |
1141 | mcfrs_setsignals(info, -1, 1); | |
1142 | #if 0 | |
1143 | mcfrs_start(tty); | |
1144 | #endif | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * ------------------------------------------------------------ | |
1150 | * mcfrs_close() | |
1151 | * | |
1152 | * This routine is called when the serial port gets closed. First, we | |
1153 | * wait for the last remaining data to be sent. Then, we unlink its | |
1154 | * S structure from the interrupt chain if necessary, and we free | |
1155 | * that IRQ if nothing is left in the chain. | |
1156 | * ------------------------------------------------------------ | |
1157 | */ | |
1158 | static void mcfrs_close(struct tty_struct *tty, struct file * filp) | |
1159 | { | |
1160 | volatile unsigned char *uartp; | |
1161 | struct mcf_serial *info = (struct mcf_serial *)tty->driver_data; | |
1162 | unsigned long flags; | |
1163 | ||
1164 | if (!info || serial_paranoia_check(info, tty->name, "mcfrs_close")) | |
1165 | return; | |
1166 | ||
1167 | local_irq_save(flags); | |
1168 | ||
1169 | if (tty_hung_up_p(filp)) { | |
1170 | local_irq_restore(flags); | |
1171 | return; | |
1172 | } | |
1173 | ||
1174 | #ifdef SERIAL_DEBUG_OPEN | |
1175 | printk("mcfrs_close ttyS%d, count = %d\n", info->line, info->count); | |
1176 | #endif | |
1177 | if ((tty->count == 1) && (info->count != 1)) { | |
1178 | /* | |
1179 | * Uh, oh. tty->count is 1, which means that the tty | |
1180 | * structure will be freed. Info->count should always | |
1181 | * be one in these conditions. If it's greater than | |
1182 | * one, we've got real problems, since it means the | |
1183 | * serial port won't be shutdown. | |
1184 | */ | |
1185 | printk("MCFRS: bad serial port count; tty->count is 1, " | |
1186 | "info->count is %d\n", info->count); | |
1187 | info->count = 1; | |
1188 | } | |
1189 | if (--info->count < 0) { | |
1190 | printk("MCFRS: bad serial port count for ttyS%d: %d\n", | |
1191 | info->line, info->count); | |
1192 | info->count = 0; | |
1193 | } | |
1194 | if (info->count) { | |
1195 | local_irq_restore(flags); | |
1196 | return; | |
1197 | } | |
1198 | info->flags |= ASYNC_CLOSING; | |
1199 | ||
1200 | /* | |
1201 | * Now we wait for the transmit buffer to clear; and we notify | |
1202 | * the line discipline to only process XON/XOFF characters. | |
1203 | */ | |
1204 | tty->closing = 1; | |
1205 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1206 | tty_wait_until_sent(tty, info->closing_wait); | |
1207 | ||
1208 | /* | |
1209 | * At this point we stop accepting input. To do this, we | |
1210 | * disable the receive line status interrupts, and tell the | |
1211 | * interrupt driver to stop checking the data ready bit in the | |
1212 | * line status register. | |
1213 | */ | |
1214 | info->imr &= ~MCFUART_UIR_RXREADY; | |
1215 | uartp = info->addr; | |
1216 | uartp[MCFUART_UIMR] = info->imr; | |
1217 | ||
1218 | #if 0 | |
1219 | /* FIXME: do we need to keep this enabled for console?? */ | |
1220 | if (mcfrs_console_inited && (mcfrs_console_port == info->line)) { | |
1221 | /* Do not disable the UART */ ; | |
1222 | } else | |
1223 | #endif | |
1224 | shutdown(info); | |
1225 | if (tty->driver->flush_buffer) | |
1226 | tty->driver->flush_buffer(tty); | |
1227 | tty_ldisc_flush(tty); | |
1228 | ||
1229 | tty->closing = 0; | |
1230 | info->event = 0; | |
1231 | info->tty = 0; | |
1232 | #if 0 | |
1233 | if (tty->ldisc.num != ldiscs[N_TTY].num) { | |
1234 | if (tty->ldisc.close) | |
1235 | (tty->ldisc.close)(tty); | |
1236 | tty->ldisc = ldiscs[N_TTY]; | |
1237 | tty->termios->c_line = N_TTY; | |
1238 | if (tty->ldisc.open) | |
1239 | (tty->ldisc.open)(tty); | |
1240 | } | |
1241 | #endif | |
1242 | if (info->blocked_open) { | |
1243 | if (info->close_delay) { | |
1244 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); | |
1245 | } | |
1246 | wake_up_interruptible(&info->open_wait); | |
1247 | } | |
1248 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1249 | wake_up_interruptible(&info->close_wait); | |
1250 | local_irq_restore(flags); | |
1251 | } | |
1252 | ||
1253 | /* | |
1254 | * mcfrs_wait_until_sent() --- wait until the transmitter is empty | |
1255 | */ | |
1256 | static void | |
1257 | mcfrs_wait_until_sent(struct tty_struct *tty, int timeout) | |
1258 | { | |
1259 | #ifdef CONFIG_M5272 | |
1260 | #define MCF5272_FIFO_SIZE 25 /* fifo size + shift reg */ | |
1261 | ||
1262 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1263 | volatile unsigned char *uartp; | |
1264 | unsigned long orig_jiffies, fifo_time, char_time, fifo_cnt; | |
1265 | ||
1266 | if (serial_paranoia_check(info, tty->name, "mcfrs_wait_until_sent")) | |
1267 | return; | |
1268 | ||
1269 | orig_jiffies = jiffies; | |
1270 | ||
1271 | /* | |
1272 | * Set the check interval to be 1/5 of the approximate time | |
1273 | * to send the entire fifo, and make it at least 1. The check | |
1274 | * interval should also be less than the timeout. | |
1275 | * | |
1276 | * Note: we have to use pretty tight timings here to satisfy | |
1277 | * the NIST-PCTS. | |
1278 | */ | |
1279 | fifo_time = (MCF5272_FIFO_SIZE * HZ * 10) / info->baud; | |
1280 | char_time = fifo_time / 5; | |
1281 | if (char_time == 0) | |
1282 | char_time = 1; | |
1283 | if (timeout && timeout < char_time) | |
1284 | char_time = timeout; | |
1285 | ||
1286 | /* | |
1287 | * Clamp the timeout period at 2 * the time to empty the | |
1288 | * fifo. Just to be safe, set the minimum at .5 seconds. | |
1289 | */ | |
1290 | fifo_time *= 2; | |
1291 | if (fifo_time < (HZ/2)) | |
1292 | fifo_time = HZ/2; | |
1293 | if (!timeout || timeout > fifo_time) | |
1294 | timeout = fifo_time; | |
1295 | ||
1296 | /* | |
1297 | * Account for the number of bytes in the UART | |
1298 | * transmitter FIFO plus any byte being shifted out. | |
1299 | */ | |
1300 | uartp = (volatile unsigned char *) info->addr; | |
1301 | for (;;) { | |
1302 | fifo_cnt = (uartp[MCFUART_UTF] & MCFUART_UTF_TXB); | |
1303 | if ((uartp[MCFUART_USR] & (MCFUART_USR_TXREADY| | |
1304 | MCFUART_USR_TXEMPTY)) == | |
1305 | MCFUART_USR_TXREADY) | |
1306 | fifo_cnt++; | |
1307 | if (fifo_cnt == 0) | |
1308 | break; | |
1309 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
1310 | if (signal_pending(current)) | |
1311 | break; | |
1312 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
1313 | break; | |
1314 | } | |
1315 | #else | |
1316 | /* | |
1317 | * For the other coldfire models, assume all data has been sent | |
1318 | */ | |
1319 | #endif | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * mcfrs_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1324 | */ | |
1325 | void mcfrs_hangup(struct tty_struct *tty) | |
1326 | { | |
1327 | struct mcf_serial * info = (struct mcf_serial *)tty->driver_data; | |
1328 | ||
1329 | if (serial_paranoia_check(info, tty->name, "mcfrs_hangup")) | |
1330 | return; | |
1331 | ||
1332 | mcfrs_flush_buffer(tty); | |
1333 | shutdown(info); | |
1334 | info->event = 0; | |
1335 | info->count = 0; | |
1336 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1337 | info->tty = 0; | |
1338 | wake_up_interruptible(&info->open_wait); | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * ------------------------------------------------------------ | |
1343 | * mcfrs_open() and friends | |
1344 | * ------------------------------------------------------------ | |
1345 | */ | |
1346 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
1347 | struct mcf_serial *info) | |
1348 | { | |
1349 | DECLARE_WAITQUEUE(wait, current); | |
1350 | int retval; | |
1351 | int do_clocal = 0; | |
1352 | ||
1353 | /* | |
1354 | * If the device is in the middle of being closed, then block | |
1355 | * until it's done, and then try again. | |
1356 | */ | |
1357 | if (info->flags & ASYNC_CLOSING) { | |
1358 | interruptible_sleep_on(&info->close_wait); | |
1359 | #ifdef SERIAL_DO_RESTART | |
1360 | if (info->flags & ASYNC_HUP_NOTIFY) | |
1361 | return -EAGAIN; | |
1362 | else | |
1363 | return -ERESTARTSYS; | |
1364 | #else | |
1365 | return -EAGAIN; | |
1366 | #endif | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * If non-blocking mode is set, or the port is not enabled, | |
1371 | * then make the check up front and then exit. | |
1372 | */ | |
1373 | if ((filp->f_flags & O_NONBLOCK) || | |
1374 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
1375 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | if (tty->termios->c_cflag & CLOCAL) | |
1380 | do_clocal = 1; | |
1381 | ||
1382 | /* | |
1383 | * Block waiting for the carrier detect and the line to become | |
1384 | * free (i.e., not in use by the callout). While we are in | |
1385 | * this loop, info->count is dropped by one, so that | |
1386 | * mcfrs_close() knows when to free things. We restore it upon | |
1387 | * exit, either normal or abnormal. | |
1388 | */ | |
1389 | retval = 0; | |
1390 | add_wait_queue(&info->open_wait, &wait); | |
1391 | #ifdef SERIAL_DEBUG_OPEN | |
1392 | printk("block_til_ready before block: ttyS%d, count = %d\n", | |
1393 | info->line, info->count); | |
1394 | #endif | |
1395 | info->count--; | |
1396 | info->blocked_open++; | |
1397 | while (1) { | |
1398 | local_irq_disable(); | |
1399 | mcfrs_setsignals(info, 1, 1); | |
1400 | local_irq_enable(); | |
1401 | current->state = TASK_INTERRUPTIBLE; | |
1402 | if (tty_hung_up_p(filp) || | |
1403 | !(info->flags & ASYNC_INITIALIZED)) { | |
1404 | #ifdef SERIAL_DO_RESTART | |
1405 | if (info->flags & ASYNC_HUP_NOTIFY) | |
1406 | retval = -EAGAIN; | |
1407 | else | |
1408 | retval = -ERESTARTSYS; | |
1409 | #else | |
1410 | retval = -EAGAIN; | |
1411 | #endif | |
1412 | break; | |
1413 | } | |
1414 | if (!(info->flags & ASYNC_CLOSING) && | |
1415 | (do_clocal || (mcfrs_getsignals(info) & TIOCM_CD))) | |
1416 | break; | |
1417 | if (signal_pending(current)) { | |
1418 | retval = -ERESTARTSYS; | |
1419 | break; | |
1420 | } | |
1421 | #ifdef SERIAL_DEBUG_OPEN | |
1422 | printk("block_til_ready blocking: ttyS%d, count = %d\n", | |
1423 | info->line, info->count); | |
1424 | #endif | |
1425 | schedule(); | |
1426 | } | |
1427 | current->state = TASK_RUNNING; | |
1428 | remove_wait_queue(&info->open_wait, &wait); | |
1429 | if (!tty_hung_up_p(filp)) | |
1430 | info->count++; | |
1431 | info->blocked_open--; | |
1432 | #ifdef SERIAL_DEBUG_OPEN | |
1433 | printk("block_til_ready after blocking: ttyS%d, count = %d\n", | |
1434 | info->line, info->count); | |
1435 | #endif | |
1436 | if (retval) | |
1437 | return retval; | |
1438 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * This routine is called whenever a serial port is opened. It | |
1444 | * enables interrupts for a serial port, linking in its structure into | |
1445 | * the IRQ chain. It also performs the serial-specific | |
1446 | * initialization for the tty structure. | |
1447 | */ | |
1448 | int mcfrs_open(struct tty_struct *tty, struct file * filp) | |
1449 | { | |
1450 | struct mcf_serial *info; | |
1451 | int retval, line; | |
1452 | ||
1453 | line = tty->index; | |
1454 | if ((line < 0) || (line >= NR_PORTS)) | |
1455 | return -ENODEV; | |
1456 | info = mcfrs_table + line; | |
1457 | if (serial_paranoia_check(info, tty->name, "mcfrs_open")) | |
1458 | return -ENODEV; | |
1459 | #ifdef SERIAL_DEBUG_OPEN | |
1460 | printk("mcfrs_open %s, count = %d\n", tty->name, info->count); | |
1461 | #endif | |
1462 | info->count++; | |
1463 | tty->driver_data = info; | |
1464 | info->tty = tty; | |
1465 | ||
1466 | /* | |
1467 | * Start up serial port | |
1468 | */ | |
1469 | retval = startup(info); | |
1470 | if (retval) | |
1471 | return retval; | |
1472 | ||
1473 | retval = block_til_ready(tty, filp, info); | |
1474 | if (retval) { | |
1475 | #ifdef SERIAL_DEBUG_OPEN | |
1476 | printk("mcfrs_open returning after block_til_ready with %d\n", | |
1477 | retval); | |
1478 | #endif | |
1479 | return retval; | |
1480 | } | |
1481 | ||
1482 | #ifdef SERIAL_DEBUG_OPEN | |
1483 | printk("mcfrs_open %s successful...\n", tty->name); | |
1484 | #endif | |
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * Based on the line number set up the internal interrupt stuff. | |
1490 | */ | |
1491 | static void mcfrs_irqinit(struct mcf_serial *info) | |
1492 | { | |
1493 | #if defined(CONFIG_M5272) | |
1494 | volatile unsigned long *icrp; | |
1495 | volatile unsigned long *portp; | |
1496 | volatile unsigned char *uartp; | |
1497 | ||
1498 | uartp = info->addr; | |
1499 | icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR2); | |
1500 | ||
1501 | switch (info->line) { | |
1502 | case 0: | |
1503 | *icrp = 0xe0000000; | |
1504 | break; | |
1505 | case 1: | |
1506 | *icrp = 0x0e000000; | |
1507 | break; | |
1508 | default: | |
1509 | printk("MCFRS: don't know how to handle UART %d interrupt?\n", | |
1510 | info->line); | |
1511 | return; | |
1512 | } | |
1513 | ||
1514 | /* Enable the output lines for the serial ports */ | |
1515 | portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PBCNT); | |
1516 | *portp = (*portp & ~0x000000ff) | 0x00000055; | |
1517 | portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PDCNT); | |
1518 | *portp = (*portp & ~0x000003fc) | 0x000002a8; | |
b0433b99 | 1519 | #elif defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) |
1da177e4 LT |
1520 | volatile unsigned char *icrp, *uartp; |
1521 | volatile unsigned long *imrp; | |
1522 | ||
1523 | uartp = info->addr; | |
1524 | ||
1525 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 + | |
1526 | MCFINTC_ICR0 + MCFINT_UART0 + info->line); | |
082f2c1c | 1527 | *icrp = 0x30 + info->line; /* level 6, line based priority */ |
1da177e4 LT |
1528 | |
1529 | imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 + | |
1530 | MCFINTC_IMRL); | |
1531 | *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1); | |
a8b8d57c GU |
1532 | #if defined(CONFIG_M527x) |
1533 | { | |
1534 | /* | |
1535 | * External Pin Mask Setting & Enable External Pin for Interface | |
1536 | * mrcbis@aliceposta.it | |
1537 | */ | |
ebfcfef4 GU |
1538 | u16 *serpin_enable_mask; |
1539 | serpin_enable_mask = (u16 *) (MCF_IPSBAR + MCF_GPIO_PAR_UART); | |
a8b8d57c GU |
1540 | if (info->line == 0) |
1541 | *serpin_enable_mask |= UART0_ENABLE_MASK; | |
1542 | else if (info->line == 1) | |
1543 | *serpin_enable_mask |= UART1_ENABLE_MASK; | |
1544 | else if (info->line == 2) | |
1545 | *serpin_enable_mask |= UART2_ENABLE_MASK; | |
1546 | } | |
1547 | #endif | |
ebfcfef4 GU |
1548 | #if defined(CONFIG_M528x) |
1549 | /* make sure PUAPAR is set for UART0 and UART1 */ | |
1550 | if (info->line < 2) { | |
1551 | volatile unsigned char *portp = (volatile unsigned char *) (MCF_MBAR + MCF5282_GPIO_PUAPAR); | |
1552 | *portp |= (0x03 << (info->line * 2)); | |
1553 | } | |
1554 | #endif | |
7f04d62b GU |
1555 | #elif defined(CONFIG_M520x) |
1556 | volatile unsigned char *icrp, *uartp; | |
1557 | volatile unsigned long *imrp; | |
1558 | ||
1559 | uartp = info->addr; | |
1560 | ||
1561 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 + | |
1562 | MCFINTC_ICR0 + MCFINT_UART0 + info->line); | |
1563 | *icrp = 0x03; | |
1564 | ||
1565 | imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 + | |
1566 | MCFINTC_IMRL); | |
1567 | *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1); | |
1568 | if (info->line < 2) { | |
1569 | unsigned short *uart_par; | |
1570 | uart_par = (unsigned short *)(MCF_IPSBAR + MCF_GPIO_PAR_UART); | |
1571 | if (info->line == 0) | |
1572 | *uart_par |= MCF_GPIO_PAR_UART_PAR_UTXD0 | |
1573 | | MCF_GPIO_PAR_UART_PAR_URXD0; | |
1574 | else if (info->line == 1) | |
1575 | *uart_par |= MCF_GPIO_PAR_UART_PAR_UTXD1 | |
1576 | | MCF_GPIO_PAR_UART_PAR_URXD1; | |
1577 | } else if (info->line == 2) { | |
1578 | unsigned char *feci2c_par; | |
1579 | feci2c_par = (unsigned char *)(MCF_IPSBAR + MCF_GPIO_PAR_FECI2C); | |
1580 | *feci2c_par &= ~0x0F; | |
1581 | *feci2c_par |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 | |
1582 | | MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2; | |
1583 | } | |
76aa698f GU |
1584 | #elif defined(CONFIG_M532x) |
1585 | volatile unsigned char *uartp; | |
1586 | uartp = info->addr; | |
1587 | switch (info->line) { | |
1588 | case 0: | |
1589 | MCF_INTC0_ICR26 = 0x3; | |
1590 | MCF_INTC0_CIMR = 26; | |
1591 | /* GPIO initialization */ | |
1592 | MCF_GPIO_PAR_UART |= 0x000F; | |
1593 | break; | |
1594 | case 1: | |
1595 | MCF_INTC0_ICR27 = 0x3; | |
1596 | MCF_INTC0_CIMR = 27; | |
1597 | /* GPIO initialization */ | |
1598 | MCF_GPIO_PAR_UART |= 0x0FF0; | |
1599 | break; | |
1600 | case 2: | |
1601 | MCF_INTC0_ICR28 = 0x3; | |
1602 | MCF_INTC0_CIMR = 28; | |
1603 | /* GPIOs also must be initalized, depends on board */ | |
1604 | break; | |
1605 | } | |
1da177e4 LT |
1606 | #else |
1607 | volatile unsigned char *icrp, *uartp; | |
1608 | ||
1609 | switch (info->line) { | |
1610 | case 0: | |
1611 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART1ICR); | |
1612 | *icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 | | |
1613 | MCFSIM_ICR_PRI1; | |
1614 | mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART1); | |
1615 | break; | |
1616 | case 1: | |
1617 | icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART2ICR); | |
1618 | *icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 | | |
1619 | MCFSIM_ICR_PRI2; | |
1620 | mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART2); | |
1621 | break; | |
1622 | default: | |
1623 | printk("MCFRS: don't know how to handle UART %d interrupt?\n", | |
1624 | info->line); | |
1625 | return; | |
1626 | } | |
1627 | ||
1628 | uartp = info->addr; | |
1629 | uartp[MCFUART_UIVR] = info->irq; | |
1630 | #endif | |
1631 | ||
1632 | /* Clear mask, so no surprise interrupts. */ | |
1633 | uartp[MCFUART_UIMR] = 0; | |
1634 | ||
40663cc7 | 1635 | if (request_irq(info->irq, mcfrs_interrupt, IRQF_DISABLED, |
1da177e4 LT |
1636 | "ColdFire UART", NULL)) { |
1637 | printk("MCFRS: Unable to attach ColdFire UART %d interrupt " | |
1638 | "vector=%d\n", info->line, info->irq); | |
1639 | } | |
1640 | ||
1641 | return; | |
1642 | } | |
1643 | ||
1644 | ||
1645 | char *mcfrs_drivername = "ColdFire internal UART serial driver version 1.00\n"; | |
1646 | ||
1647 | ||
1648 | /* | |
1649 | * Serial stats reporting... | |
1650 | */ | |
1651 | int mcfrs_readproc(char *page, char **start, off_t off, int count, | |
1652 | int *eof, void *data) | |
1653 | { | |
1654 | struct mcf_serial *info; | |
1655 | char str[20]; | |
1656 | int len, sigs, i; | |
1657 | ||
1658 | len = sprintf(page, mcfrs_drivername); | |
1659 | for (i = 0; (i < NR_PORTS); i++) { | |
1660 | info = &mcfrs_table[i]; | |
1661 | len += sprintf((page + len), "%d: port:%x irq=%d baud:%d ", | |
1662 | i, (unsigned int) info->addr, info->irq, info->baud); | |
1663 | if (info->stats.rx || info->stats.tx) | |
1664 | len += sprintf((page + len), "tx:%d rx:%d ", | |
1665 | info->stats.tx, info->stats.rx); | |
1666 | if (info->stats.rxframing) | |
1667 | len += sprintf((page + len), "fe:%d ", | |
1668 | info->stats.rxframing); | |
1669 | if (info->stats.rxparity) | |
1670 | len += sprintf((page + len), "pe:%d ", | |
1671 | info->stats.rxparity); | |
1672 | if (info->stats.rxbreak) | |
1673 | len += sprintf((page + len), "brk:%d ", | |
1674 | info->stats.rxbreak); | |
1675 | if (info->stats.rxoverrun) | |
1676 | len += sprintf((page + len), "oe:%d ", | |
1677 | info->stats.rxoverrun); | |
1678 | ||
1679 | str[0] = str[1] = 0; | |
1680 | if ((sigs = mcfrs_getsignals(info))) { | |
1681 | if (sigs & TIOCM_RTS) | |
1682 | strcat(str, "|RTS"); | |
1683 | if (sigs & TIOCM_CTS) | |
1684 | strcat(str, "|CTS"); | |
1685 | if (sigs & TIOCM_DTR) | |
1686 | strcat(str, "|DTR"); | |
1687 | if (sigs & TIOCM_CD) | |
1688 | strcat(str, "|CD"); | |
1689 | } | |
1690 | ||
1691 | len += sprintf((page + len), "%s\n", &str[1]); | |
1692 | } | |
1693 | ||
1694 | return(len); | |
1695 | } | |
1696 | ||
1697 | ||
1698 | /* Finally, routines used to initialize the serial driver. */ | |
1699 | ||
1700 | static void show_serial_version(void) | |
1701 | { | |
1702 | printk(mcfrs_drivername); | |
1703 | } | |
1704 | ||
b68e31d0 | 1705 | static const struct tty_operations mcfrs_ops = { |
1da177e4 LT |
1706 | .open = mcfrs_open, |
1707 | .close = mcfrs_close, | |
1708 | .write = mcfrs_write, | |
1709 | .flush_chars = mcfrs_flush_chars, | |
1710 | .write_room = mcfrs_write_room, | |
1711 | .chars_in_buffer = mcfrs_chars_in_buffer, | |
1712 | .flush_buffer = mcfrs_flush_buffer, | |
1713 | .ioctl = mcfrs_ioctl, | |
1714 | .throttle = mcfrs_throttle, | |
1715 | .unthrottle = mcfrs_unthrottle, | |
1716 | .set_termios = mcfrs_set_termios, | |
1717 | .stop = mcfrs_stop, | |
1718 | .start = mcfrs_start, | |
1719 | .hangup = mcfrs_hangup, | |
1720 | .read_proc = mcfrs_readproc, | |
1721 | .wait_until_sent = mcfrs_wait_until_sent, | |
1722 | .tiocmget = mcfrs_tiocmget, | |
1723 | .tiocmset = mcfrs_tiocmset, | |
1724 | }; | |
1725 | ||
1726 | /* mcfrs_init inits the driver */ | |
1727 | static int __init | |
1728 | mcfrs_init(void) | |
1729 | { | |
1730 | struct mcf_serial *info; | |
1731 | unsigned long flags; | |
1732 | int i; | |
1733 | ||
1734 | /* Setup base handler, and timer table. */ | |
1735 | #ifdef MCFPP_DCD0 | |
1736 | init_timer(&mcfrs_timer_struct); | |
1737 | mcfrs_timer_struct.function = mcfrs_timer; | |
1738 | mcfrs_timer_struct.data = 0; | |
1739 | mcfrs_timer_struct.expires = jiffies + HZ/25; | |
1740 | add_timer(&mcfrs_timer_struct); | |
1741 | mcfrs_ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1); | |
1742 | #endif | |
1743 | mcfrs_serial_driver = alloc_tty_driver(NR_PORTS); | |
1744 | if (!mcfrs_serial_driver) | |
1745 | return -ENOMEM; | |
1746 | ||
1747 | show_serial_version(); | |
1748 | ||
1749 | /* Initialize the tty_driver structure */ | |
1750 | mcfrs_serial_driver->owner = THIS_MODULE; | |
1751 | mcfrs_serial_driver->name = "ttyS"; | |
a8b8d57c | 1752 | mcfrs_serial_driver->driver_name = "mcfserial"; |
1da177e4 LT |
1753 | mcfrs_serial_driver->major = TTY_MAJOR; |
1754 | mcfrs_serial_driver->minor_start = 64; | |
1755 | mcfrs_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1756 | mcfrs_serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
1757 | mcfrs_serial_driver->init_termios = tty_std_termios; | |
1758 | ||
1759 | mcfrs_serial_driver->init_termios.c_cflag = | |
1760 | mcfrs_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL; | |
1761 | mcfrs_serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
1762 | ||
1763 | tty_set_operations(mcfrs_serial_driver, &mcfrs_ops); | |
1764 | ||
1765 | if (tty_register_driver(mcfrs_serial_driver)) { | |
1766 | printk("MCFRS: Couldn't register serial driver\n"); | |
1767 | put_tty_driver(mcfrs_serial_driver); | |
1768 | return(-EBUSY); | |
1769 | } | |
1770 | ||
1771 | local_irq_save(flags); | |
1772 | ||
1773 | /* | |
1774 | * Configure all the attached serial ports. | |
1775 | */ | |
1776 | for (i = 0, info = mcfrs_table; (i < NR_PORTS); i++, info++) { | |
1777 | info->magic = SERIAL_MAGIC; | |
1778 | info->line = i; | |
1779 | info->tty = 0; | |
1780 | info->custom_divisor = 16; | |
1781 | info->close_delay = 50; | |
1782 | info->closing_wait = 3000; | |
1783 | info->x_char = 0; | |
1784 | info->event = 0; | |
1785 | info->count = 0; | |
1786 | info->blocked_open = 0; | |
28580df0 GU |
1787 | INIT_WORK(&info->tqueue, mcfrs_offintr); |
1788 | INIT_WORK(&info->tqueue_hangup, do_serial_hangup); | |
1da177e4 LT |
1789 | init_waitqueue_head(&info->open_wait); |
1790 | init_waitqueue_head(&info->close_wait); | |
1791 | ||
1792 | info->imr = 0; | |
1793 | mcfrs_setsignals(info, 0, 0); | |
1794 | mcfrs_irqinit(info); | |
1795 | ||
1796 | printk("ttyS%d at 0x%04x (irq = %d)", info->line, | |
1797 | (unsigned int) info->addr, info->irq); | |
1798 | printk(" is a builtin ColdFire UART\n"); | |
1799 | } | |
1800 | ||
1801 | local_irq_restore(flags); | |
1802 | return 0; | |
1803 | } | |
1804 | ||
1805 | module_init(mcfrs_init); | |
1806 | ||
1807 | /****************************************************************************/ | |
1808 | /* Serial Console */ | |
1809 | /****************************************************************************/ | |
1810 | ||
1811 | /* | |
1812 | * Quick and dirty UART initialization, for console output. | |
1813 | */ | |
1814 | ||
1815 | void mcfrs_init_console(void) | |
1816 | { | |
1817 | volatile unsigned char *uartp; | |
1818 | unsigned int clk; | |
1819 | ||
1820 | /* | |
1821 | * Reset UART, get it into known state... | |
1822 | */ | |
1823 | uartp = (volatile unsigned char *) (MCF_MBAR + | |
1824 | (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1)); | |
1825 | ||
1826 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ | |
1827 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ | |
1828 | uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */ | |
1829 | ||
1830 | /* | |
1831 | * Set port for defined baud , 8 data bits, 1 stop bit, no parity. | |
1832 | */ | |
1833 | uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8; | |
1834 | uartp[MCFUART_UMR] = MCFUART_MR2_STOP1; | |
1835 | ||
a8b8d57c GU |
1836 | #ifdef CONFIG_M5272 |
1837 | { | |
1838 | /* | |
1839 | * For the MCF5272, also compute the baudrate fraction. | |
1840 | */ | |
1841 | int fraction = MCF_BUSCLK - (clk * 32 * mcfrs_console_baud); | |
1842 | fraction *= 16; | |
1843 | fraction /= (32 * mcfrs_console_baud); | |
1844 | uartp[MCFUART_UFPD] = (fraction & 0xf); /* set fraction */ | |
1845 | clk = (MCF_BUSCLK / mcfrs_console_baud) / 32; | |
1846 | } | |
1847 | #else | |
1da177e4 | 1848 | clk = ((MCF_BUSCLK / mcfrs_console_baud) + 16) / 32; /* set baud */ |
a8b8d57c GU |
1849 | #endif |
1850 | ||
1da177e4 LT |
1851 | uartp[MCFUART_UBG1] = (clk & 0xff00) >> 8; /* set msb baud */ |
1852 | uartp[MCFUART_UBG2] = (clk & 0xff); /* set lsb baud */ | |
1da177e4 LT |
1853 | uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER; |
1854 | uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; | |
1855 | ||
1856 | mcfrs_console_inited++; | |
1857 | return; | |
1858 | } | |
1859 | ||
1860 | ||
1861 | /* | |
1862 | * Setup for console. Argument comes from the boot command line. | |
1863 | */ | |
1864 | ||
1865 | int mcfrs_console_setup(struct console *cp, char *arg) | |
1866 | { | |
1867 | int i, n = CONSOLE_BAUD_RATE; | |
1868 | ||
1869 | if (!cp) | |
1870 | return(-1); | |
1871 | ||
1872 | if (!strncmp(cp->name, "ttyS", 4)) | |
1873 | mcfrs_console_port = cp->index; | |
1874 | else if (!strncmp(cp->name, "cua", 3)) | |
1875 | mcfrs_console_port = cp->index; | |
1876 | else | |
1877 | return(-1); | |
1878 | ||
1879 | if (arg) | |
1880 | n = simple_strtoul(arg,NULL,0); | |
1881 | for (i = 0; i < MCFRS_BAUD_TABLE_SIZE; i++) | |
1882 | if (mcfrs_baud_table[i] == n) | |
1883 | break; | |
1884 | if (i < MCFRS_BAUD_TABLE_SIZE) { | |
1885 | mcfrs_console_baud = n; | |
1886 | mcfrs_console_cbaud = 0; | |
1887 | if (i > 15) { | |
1888 | mcfrs_console_cbaud |= CBAUDEX; | |
1889 | i -= 15; | |
1890 | } | |
1891 | mcfrs_console_cbaud |= i; | |
1892 | } | |
1893 | mcfrs_init_console(); /* make sure baud rate changes */ | |
1894 | return(0); | |
1895 | } | |
1896 | ||
1897 | ||
1898 | static struct tty_driver *mcfrs_console_device(struct console *c, int *index) | |
1899 | { | |
1900 | *index = c->index; | |
1901 | return mcfrs_serial_driver; | |
1902 | } | |
1903 | ||
1904 | ||
1905 | /* | |
1906 | * Output a single character, using UART polled mode. | |
1907 | * This is used for console output. | |
1908 | */ | |
1909 | ||
1910 | void mcfrs_put_char(char ch) | |
1911 | { | |
1912 | volatile unsigned char *uartp; | |
1913 | unsigned long flags; | |
1914 | int i; | |
1915 | ||
1916 | uartp = (volatile unsigned char *) (MCF_MBAR + | |
1917 | (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1)); | |
1918 | ||
1919 | local_irq_save(flags); | |
1920 | for (i = 0; (i < 0x10000); i++) { | |
1921 | if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY) | |
1922 | break; | |
1923 | } | |
1924 | if (i < 0x10000) { | |
1925 | uartp[MCFUART_UTB] = ch; | |
1926 | for (i = 0; (i < 0x10000); i++) | |
1927 | if (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY) | |
1928 | break; | |
1929 | } | |
1930 | if (i >= 0x10000) | |
1931 | mcfrs_init_console(); /* try and get it back */ | |
1932 | local_irq_restore(flags); | |
1933 | ||
1934 | return; | |
1935 | } | |
1936 | ||
1937 | ||
1938 | /* | |
1939 | * rs_console_write is registered for printk output. | |
1940 | */ | |
1941 | ||
1942 | void mcfrs_console_write(struct console *cp, const char *p, unsigned len) | |
1943 | { | |
1944 | if (!mcfrs_console_inited) | |
1945 | mcfrs_init_console(); | |
1946 | while (len-- > 0) { | |
1947 | if (*p == '\n') | |
1948 | mcfrs_put_char('\r'); | |
1949 | mcfrs_put_char(*p++); | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | /* | |
1954 | * declare our consoles | |
1955 | */ | |
1956 | ||
1957 | struct console mcfrs_console = { | |
1958 | .name = "ttyS", | |
1959 | .write = mcfrs_console_write, | |
1960 | .device = mcfrs_console_device, | |
1961 | .setup = mcfrs_console_setup, | |
1962 | .flags = CON_PRINTBUFFER, | |
1963 | .index = -1, | |
1964 | }; | |
1965 | ||
1966 | static int __init mcfrs_console_init(void) | |
1967 | { | |
1968 | register_console(&mcfrs_console); | |
1969 | return 0; | |
1970 | } | |
1971 | ||
1972 | console_initcall(mcfrs_console_init); | |
1973 | ||
1974 | /****************************************************************************/ |