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authorAdrian Bunk <bunk@kernel.org>2008-10-13 05:31:59 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 12:51:38 -0400
commit02f11f392434656f00fdcc8c51348d52bd39afe8 (patch)
tree0f08c44e29a876abffd13d8842f05e88c183c761 /drivers/serial
parent2571cd6a8e07a13fd3ac77f5e2c5470966d6f9c9 (diff)
coldfire: scheduled SERIAL_COLDFIRE removal
This patch contains the scheduled removal of the obsolete SERIAL_COLDFIRE driver. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/Kconfig16
-rw-r--r--drivers/serial/Makefile1
-rw-r--r--drivers/serial/mcfserial.c1965
-rw-r--r--drivers/serial/mcfserial.h74
4 files changed, 2 insertions, 2054 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 77cb34270fc1..0db20452c79a 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -994,24 +994,12 @@ config SERIAL_68328_RTS_CTS
994 bool "Support RTS/CTS on 68328 serial port" 994 bool "Support RTS/CTS on 68328 serial port"
995 depends on SERIAL_68328 995 depends on SERIAL_68328
996 996
997config SERIAL_COLDFIRE
998 bool "ColdFire serial support (DEPRECATED)"
999 depends on COLDFIRE
1000 help
1001 This driver supports the built-in serial ports of the Motorola ColdFire
1002 family of CPUs.
1003 This driver is deprecated because it supports only the old interface
1004 for serial drivers and features like magic keys are not working.
1005 Please switch to the new style driver because this driver will be
1006 removed soon.
1007
1008config SERIAL_MCF 997config SERIAL_MCF
1009 bool "Coldfire serial support (new style driver)" 998 bool "Coldfire serial support"
1010 depends on COLDFIRE 999 depends on COLDFIRE
1011 select SERIAL_CORE 1000 select SERIAL_CORE
1012 help 1001 help
1013 This new serial driver supports the Freescale Coldfire serial ports 1002 This serial driver supports the Freescale Coldfire serial ports.
1014 using the new serial driver subsystem.
1015 1003
1016config SERIAL_MCF_BAUDRATE 1004config SERIAL_MCF_BAUDRATE
1017 int "Default baudrate for Coldfire serial ports" 1005 int "Default baudrate for Coldfire serial ports"
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 7e7383e890d8..1462eb3f7bd2 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -40,7 +40,6 @@ obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o
40obj-$(CONFIG_SERIAL_MUX) += mux.o 40obj-$(CONFIG_SERIAL_MUX) += mux.o
41obj-$(CONFIG_SERIAL_68328) += 68328serial.o 41obj-$(CONFIG_SERIAL_68328) += 68328serial.o
42obj-$(CONFIG_SERIAL_68360) += 68360serial.o 42obj-$(CONFIG_SERIAL_68360) += 68360serial.o
43obj-$(CONFIG_SERIAL_COLDFIRE) += mcfserial.o
44obj-$(CONFIG_SERIAL_MCF) += mcf.o 43obj-$(CONFIG_SERIAL_MCF) += mcf.o
45obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o 44obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o
46obj-$(CONFIG_SERIAL_LH7A40X) += serial_lh7a40x.o 45obj-$(CONFIG_SERIAL_LH7A40X) += serial_lh7a40x.o
diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
deleted file mode 100644
index fbe3835f6b77..000000000000
--- a/drivers/serial/mcfserial.c
+++ /dev/null
@@ -1,1965 +0,0 @@
1#warning This driver is deprecated. Check Kconfig for details.
2/*
3 * mcfserial.c -- serial driver for ColdFire internal UARTS.
4 *
5 * Copyright (C) 1999-2003 Greg Ungerer <gerg@snapgear.com>
6 * Copyright (c) 2000-2001 Lineo, Inc. <www.lineo.com>
7 * Copyright (C) 2001-2002 SnapGear Inc. <www.snapgear.com>
8 *
9 * Based on code from 68332serial.c which was:
10 *
11 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
12 * Copyright (C) 1998 TSHG
13 * Copyright (c) 1999 Rt-Control Inc. <jeff@uclinux.org>
14 *
15 * Changes:
16 * 08/07/2003 Daniele Bellucci <bellucda@tiscali.it>
17 * some cleanups in mcfrs_write.
18 *
19 */
20
21#include <linux/module.h>
22#include <linux/errno.h>
23#include <linux/signal.h>
24#include <linux/sched.h>
25#include <linux/timer.h>
26#include <linux/wait.h>
27#include <linux/interrupt.h>
28#include <linux/tty.h>
29#include <linux/tty_flip.h>
30#include <linux/string.h>
31#include <linux/fcntl.h>
32#include <linux/mm.h>
33#include <linux/kernel.h>
34#include <linux/serial.h>
35#include <linux/serialP.h>
36#include <linux/console.h>
37#include <linux/init.h>
38#include <linux/bitops.h>
39#include <linux/delay.h>
40
41#include <asm/io.h>
42#include <asm/irq.h>
43#include <asm/system.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
52struct 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 */
60#if defined(CONFIG_HW_FEITH)
61#define CONSOLE_BAUD_RATE 38400
62#define DEFAULT_CBAUD B38400
63#elif defined(CONFIG_MOD5272) || defined(CONFIG_M5208EVB) || \
64 defined(CONFIG_M5329EVB) || defined(CONFIG_GILBARCO)
65#define CONSOLE_BAUD_RATE 115200
66#define DEFAULT_CBAUD B115200
67#elif defined(CONFIG_ARNEWSH) || defined(CONFIG_FREESCALE) || \
68 defined(CONFIG_senTec) || defined(CONFIG_SNEHA) || defined(CONFIG_AVNET)
69#define CONSOLE_BAUD_RATE 19200
70#define DEFAULT_CBAUD B19200
71#endif
72
73#ifndef CONSOLE_BAUD_RATE
74#define CONSOLE_BAUD_RATE 9600
75#define DEFAULT_CBAUD B9600
76#endif
77
78int mcfrs_console_inited = 0;
79int mcfrs_console_port = -1;
80int mcfrs_console_baud = CONSOLE_BAUD_RATE;
81int mcfrs_console_cbaud = DEFAULT_CBAUD;
82
83/*
84 * Driver data structures.
85 */
86static 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
96#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
97 defined(CONFIG_M520x) || defined(CONFIG_M532x)
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 */
106static 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 },
113#ifdef MCFUART_BASE2
114 { /* ttyS1 */
115 .magic = 0,
116 .addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE2),
117 .irq = IRQBASE+1,
118 .flags = ASYNC_BOOT_AUTOCONF,
119 },
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
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 */
145static 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 */
157extern int magic_sysrq_key(int ch);
158#endif
159
160
161/*
162 * Forware declarations...
163 */
164static void mcfrs_change_speed(struct mcf_serial *info);
165static void mcfrs_wait_until_sent(struct tty_struct *tty, int timeout);
166
167
168static 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 */
192static 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 */
228static 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 */
272static 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
288static 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
327static inline void receive_chars(struct mcf_serial *info)
328{
329 volatile unsigned char *uartp;
330 struct tty_struct *tty = info->port.tty;
331 unsigned char status, ch, flag;
332
333 if (!tty)
334 return;
335
336 uartp = info->addr;
337
338 while ((status = uartp[MCFUART_USR]) & MCFUART_USR_RXREADY) {
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
349 flag = TTY_NORMAL;
350 if (status & MCFUART_USR_RXERR) {
351 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR;
352 if (status & MCFUART_USR_RXBREAK) {
353 info->stats.rxbreak++;
354 flag = TTY_BREAK;
355 } else if (status & MCFUART_USR_RXPARITY) {
356 info->stats.rxparity++;
357 flag = TTY_PARITY;
358 } else if (status & MCFUART_USR_RXOVERRUN) {
359 info->stats.rxoverrun++;
360 flag = TTY_OVERRUN;
361 } else if (status & MCFUART_USR_RXFRAMING) {
362 info->stats.rxframing++;
363 flag = TTY_FRAME;
364 }
365 }
366 tty_insert_flip_char(tty, ch, flag);
367 }
368 tty_schedule_flip(tty);
369 return;
370}
371
372static 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->port.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 */
407irqreturn_t mcfrs_interrupt(int irq, void *dev_id)
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
428static void mcfrs_offintr(struct work_struct *work)
429{
430 struct mcf_serial *info = container_of(work, struct mcf_serial, tqueue);
431 struct tty_struct *tty = info->port.tty;
432
433 if (tty)
434 tty_wakeup(tty);
435}
436
437
438/*
439 * Change of state on a DCD line.
440 */
441void mcfrs_modem_change(struct mcf_serial *info, int dcd)
442{
443 if (info->count == 0)
444 return;
445
446 if (info->flags & ASYNC_CHECK_CD) {
447 if (dcd)
448 wake_up_interruptible(&info->open_wait);
449 else
450 schedule_work(&info->tqueue_hangup);
451 }
452}
453
454
455#ifdef MCFPP_DCD0
456
457unsigned short mcfrs_ppstatus;
458
459/*
460 * This subroutine is called when the RS_TIMER goes off. It is used
461 * to monitor the state of the DCD lines - since they have no edge
462 * sensors and interrupt generators.
463 */
464static void mcfrs_timer(void)
465{
466 unsigned int ppstatus, dcdval, i;
467
468 ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1);
469
470 if (ppstatus != mcfrs_ppstatus) {
471 for (i = 0; (i < 2); i++) {
472 dcdval = (i ? MCFPP_DCD1 : MCFPP_DCD0);
473 if ((ppstatus & dcdval) != (mcfrs_ppstatus & dcdval)) {
474 mcfrs_modem_change(&mcfrs_table[i],
475 ((ppstatus & dcdval) ? 0 : 1));
476 }
477 }
478 }
479 mcfrs_ppstatus = ppstatus;
480
481 /* Re-arm timer */
482 mcfrs_timer_struct.expires = jiffies + HZ/25;
483 add_timer(&mcfrs_timer_struct);
484}
485
486#endif /* MCFPP_DCD0 */
487
488
489/*
490 * This routine is called from the scheduler tqueue when the interrupt
491 * routine has signalled that a hangup has occurred. The path of
492 * hangup processing is:
493 *
494 * serial interrupt routine -> (scheduler tqueue) ->
495 * do_serial_hangup() -> tty->hangup() -> mcfrs_hangup()
496 *
497 */
498static void do_serial_hangup(struct work_struct *work)
499{
500 struct mcf_serial *info = container_of(work, struct mcf_serial, tqueue_hangup);
501 struct tty_struct *tty = info->port.tty;
502
503 if (tty)
504 tty_hangup(tty);
505}
506
507static int startup(struct mcf_serial * info)
508{
509 volatile unsigned char *uartp;
510 unsigned long flags;
511
512 if (info->flags & ASYNC_INITIALIZED)
513 return 0;
514
515 if (!info->xmit_buf) {
516 info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL);
517 if (!info->xmit_buf)
518 return -ENOMEM;
519 }
520
521 local_irq_save(flags);
522
523#ifdef SERIAL_DEBUG_OPEN
524 printk("starting up ttyS%d (irq %d)...\n", info->line, info->irq);
525#endif
526
527 /*
528 * Reset UART, get it into known state...
529 */
530 uartp = info->addr;
531 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
532 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
533 mcfrs_setsignals(info, 1, 1);
534
535 if (info->port.tty)
536 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
537 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
538
539 /*
540 * and set the speed of the serial port
541 */
542 mcfrs_change_speed(info);
543
544 /*
545 * Lastly enable the UART transmitter and receiver, and
546 * interrupt enables.
547 */
548 info->imr = MCFUART_UIR_RXREADY;
549 uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
550 uartp[MCFUART_UIMR] = info->imr;
551
552 info->flags |= ASYNC_INITIALIZED;
553 local_irq_restore(flags);
554 return 0;
555}
556
557/*
558 * This routine will shutdown a serial port; interrupts are disabled, and
559 * DTR is dropped if the hangup on close termio flag is on.
560 */
561static void shutdown(struct mcf_serial * info)
562{
563 volatile unsigned char *uartp;
564 unsigned long flags;
565
566 if (!(info->flags & ASYNC_INITIALIZED))
567 return;
568
569#ifdef SERIAL_DEBUG_OPEN
570 printk("Shutting down serial port %d (irq %d)....\n", info->line,
571 info->irq);
572#endif
573
574 local_irq_save(flags);
575
576 uartp = info->addr;
577 uartp[MCFUART_UIMR] = 0; /* mask all interrupts */
578 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
579 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
580
581 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
582 mcfrs_setsignals(info, 0, 0);
583
584 if (info->xmit_buf) {
585 free_page((unsigned long) info->xmit_buf);
586 info->xmit_buf = 0;
587 }
588
589 if (info->port.tty)
590 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
591
592 info->flags &= ~ASYNC_INITIALIZED;
593 local_irq_restore(flags);
594}
595
596
597/*
598 * This routine is called to set the UART divisor registers to match
599 * the specified baud rate for a serial port.
600 */
601static void mcfrs_change_speed(struct mcf_serial *info)
602{
603 volatile unsigned char *uartp;
604 unsigned int baudclk, cflag;
605 unsigned long flags;
606 unsigned char mr1, mr2;
607 int i;
608#ifdef CONFIG_M5272
609 unsigned int fraction;
610#endif
611
612 if (!info->port.tty || !info->port.tty->termios)
613 return;
614 cflag = info->port.tty->termios->c_cflag;
615 if (info->addr == 0)
616 return;
617
618#if 0
619 printk("%s(%d): mcfrs_change_speed()\n", __FILE__, __LINE__);
620#endif
621
622 i = cflag & CBAUD;
623 if (i & CBAUDEX) {
624 i &= ~CBAUDEX;
625 if (i < 1 || i > 4)
626 info->port.tty->termios->c_cflag &= ~CBAUDEX;
627 else
628 i += 15;
629 }
630 if (i == 0) {
631 mcfrs_setsignals(info, 0, -1);
632 return;
633 }
634
635 /* compute the baudrate clock */
636#ifdef CONFIG_M5272
637 /*
638 * For the MCF5272, also compute the baudrate fraction.
639 */
640 baudclk = (MCF_BUSCLK / mcfrs_baud_table[i]) / 32;
641 fraction = MCF_BUSCLK - (baudclk * 32 * mcfrs_baud_table[i]);
642 fraction *= 16;
643 fraction /= (32 * mcfrs_baud_table[i]);
644#else
645 baudclk = ((MCF_BUSCLK / mcfrs_baud_table[i]) + 16) / 32;
646#endif
647
648 info->baud = mcfrs_baud_table[i];
649
650 mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR;
651 mr2 = 0;
652
653 switch (cflag & CSIZE) {
654 case CS5: mr1 |= MCFUART_MR1_CS5; break;
655 case CS6: mr1 |= MCFUART_MR1_CS6; break;
656 case CS7: mr1 |= MCFUART_MR1_CS7; break;
657 case CS8:
658 default: mr1 |= MCFUART_MR1_CS8; break;
659 }
660
661 if (cflag & PARENB) {
662 if (cflag & CMSPAR) {
663 if (cflag & PARODD)
664 mr1 |= MCFUART_MR1_PARITYMARK;
665 else
666 mr1 |= MCFUART_MR1_PARITYSPACE;
667 } else {
668 if (cflag & PARODD)
669 mr1 |= MCFUART_MR1_PARITYODD;
670 else
671 mr1 |= MCFUART_MR1_PARITYEVEN;
672 }
673 } else {
674 mr1 |= MCFUART_MR1_PARITYNONE;
675 }
676
677 if (cflag & CSTOPB)
678 mr2 |= MCFUART_MR2_STOP2;
679 else
680 mr2 |= MCFUART_MR2_STOP1;
681
682 if (cflag & CRTSCTS) {
683 mr1 |= MCFUART_MR1_RXRTS;
684 mr2 |= MCFUART_MR2_TXCTS;
685 }
686
687 if (cflag & CLOCAL)
688 info->flags &= ~ASYNC_CHECK_CD;
689 else
690 info->flags |= ASYNC_CHECK_CD;
691
692 uartp = info->addr;
693
694 local_irq_save(flags);
695#if 0
696 printk("%s(%d): mr1=%x mr2=%x baudclk=%x\n", __FILE__, __LINE__,
697 mr1, mr2, baudclk);
698#endif
699 /*
700 Note: pg 12-16 of MCF5206e User's Manual states that a
701 software reset should be performed prior to changing
702 UMR1,2, UCSR, UACR, bit 7
703 */
704 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
705 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
706 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */
707 uartp[MCFUART_UMR] = mr1;
708 uartp[MCFUART_UMR] = mr2;
709 uartp[MCFUART_UBG1] = (baudclk & 0xff00) >> 8; /* set msb byte */
710 uartp[MCFUART_UBG2] = (baudclk & 0xff); /* set lsb byte */
711#ifdef CONFIG_M5272
712 uartp[MCFUART_UFPD] = (fraction & 0xf); /* set fraction */
713#endif
714 uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
715 uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
716 mcfrs_setsignals(info, 1, -1);
717 local_irq_restore(flags);
718 return;
719}
720
721static void mcfrs_flush_chars(struct tty_struct *tty)
722{
723 volatile unsigned char *uartp;
724 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
725 unsigned long flags;
726
727 if (serial_paranoia_check(info, tty->name, "mcfrs_flush_chars"))
728 return;
729
730 uartp = (volatile unsigned char *) info->addr;
731
732 /*
733 * re-enable receiver interrupt
734 */
735 local_irq_save(flags);
736 if ((!(info->imr & MCFUART_UIR_RXREADY)) &&
737 (info->flags & ASYNC_INITIALIZED) ) {
738 info->imr |= MCFUART_UIR_RXREADY;
739 uartp[MCFUART_UIMR] = info->imr;
740 }
741 local_irq_restore(flags);
742
743 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
744 !info->xmit_buf)
745 return;
746
747 /* Enable transmitter */
748 local_irq_save(flags);
749 info->imr |= MCFUART_UIR_TXREADY;
750 uartp[MCFUART_UIMR] = info->imr;
751 local_irq_restore(flags);
752}
753
754static int mcfrs_write(struct tty_struct * tty,
755 const unsigned char *buf, int count)
756{
757 volatile unsigned char *uartp;
758 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
759 unsigned long flags;
760 int c, total = 0;
761
762#if 0
763 printk("%s(%d): mcfrs_write(tty=%x,buf=%x,count=%d)\n",
764 __FILE__, __LINE__, (int)tty, (int)buf, count);
765#endif
766
767 if (serial_paranoia_check(info, tty->name, "mcfrs_write"))
768 return 0;
769
770 if (!tty || !info->xmit_buf)
771 return 0;
772
773 local_save_flags(flags);
774 while (1) {
775 local_irq_disable();
776 c = min(count, (int) min(((int)SERIAL_XMIT_SIZE) - info->xmit_cnt - 1,
777 ((int)SERIAL_XMIT_SIZE) - info->xmit_head));
778 local_irq_restore(flags);
779
780 if (c <= 0)
781 break;
782
783 memcpy(info->xmit_buf + info->xmit_head, buf, c);
784
785 local_irq_disable();
786 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
787 info->xmit_cnt += c;
788 local_irq_restore(flags);
789
790 buf += c;
791 count -= c;
792 total += c;
793 }
794
795 local_irq_disable();
796 uartp = info->addr;
797 info->imr |= MCFUART_UIR_TXREADY;
798 uartp[MCFUART_UIMR] = info->imr;
799 local_irq_restore(flags);
800
801 return total;
802}
803
804static int mcfrs_write_room(struct tty_struct *tty)
805{
806 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
807 int ret;
808
809 if (serial_paranoia_check(info, tty->name, "mcfrs_write_room"))
810 return 0;
811 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
812 if (ret < 0)
813 ret = 0;
814 return ret;
815}
816
817static int mcfrs_chars_in_buffer(struct tty_struct *tty)
818{
819 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
820
821 if (serial_paranoia_check(info, tty->name, "mcfrs_chars_in_buffer"))
822 return 0;
823 return info->xmit_cnt;
824}
825
826static void mcfrs_flush_buffer(struct tty_struct *tty)
827{
828 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
829 unsigned long flags;
830
831 if (serial_paranoia_check(info, tty->name, "mcfrs_flush_buffer"))
832 return;
833
834 local_irq_save(flags);
835 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
836 local_irq_restore(flags);
837
838 tty_wakeup(tty);
839}
840
841/*
842 * ------------------------------------------------------------
843 * mcfrs_throttle()
844 *
845 * This routine is called by the upper-layer tty layer to signal that
846 * incoming characters should be throttled.
847 * ------------------------------------------------------------
848 */
849static void mcfrs_throttle(struct tty_struct * tty)
850{
851 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
852#ifdef SERIAL_DEBUG_THROTTLE
853 char buf[64];
854
855 printk("throttle %s: %d....\n", tty_name(tty, buf),
856 tty->ldisc.chars_in_buffer(tty));
857#endif
858
859 if (serial_paranoia_check(info, tty->name, "mcfrs_throttle"))
860 return;
861
862 if (I_IXOFF(tty))
863 info->x_char = STOP_CHAR(tty);
864
865 /* Turn off RTS line (do this atomic) */
866}
867
868static void mcfrs_unthrottle(struct tty_struct * tty)
869{
870 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
871#ifdef SERIAL_DEBUG_THROTTLE
872 char buf[64];
873
874 printk("unthrottle %s: %d....\n", tty_name(tty, buf),
875 tty->ldisc.chars_in_buffer(tty));
876#endif
877
878 if (serial_paranoia_check(info, tty->name, "mcfrs_unthrottle"))
879 return;
880
881 if (I_IXOFF(tty)) {
882 if (info->x_char)
883 info->x_char = 0;
884 else
885 info->x_char = START_CHAR(tty);
886 }
887
888 /* Assert RTS line (do this atomic) */
889}
890
891/*
892 * ------------------------------------------------------------
893 * mcfrs_ioctl() and friends
894 * ------------------------------------------------------------
895 */
896
897static int get_serial_info(struct mcf_serial * info,
898 struct serial_struct * retinfo)
899{
900 struct serial_struct tmp;
901
902 if (!retinfo)
903 return -EFAULT;
904 memset(&tmp, 0, sizeof(tmp));
905 tmp.type = info->type;
906 tmp.line = info->line;
907 tmp.port = (unsigned int) info->addr;
908 tmp.irq = info->irq;
909 tmp.flags = info->flags;
910 tmp.baud_base = info->baud_base;
911 tmp.close_delay = info->close_delay;
912 tmp.closing_wait = info->closing_wait;
913 tmp.custom_divisor = info->custom_divisor;
914 return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0;
915}
916
917static int set_serial_info(struct mcf_serial * info,
918 struct serial_struct * new_info)
919{
920 struct serial_struct new_serial;
921 struct mcf_serial old_info;
922 int retval = 0;
923
924 if (!new_info)
925 return -EFAULT;
926 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
927 return -EFAULT;
928 old_info = *info;
929
930 if (!capable(CAP_SYS_ADMIN)) {
931 if ((new_serial.baud_base != info->baud_base) ||
932 (new_serial.type != info->type) ||
933 (new_serial.close_delay != info->close_delay) ||
934 ((new_serial.flags & ~ASYNC_USR_MASK) !=
935 (info->flags & ~ASYNC_USR_MASK)))
936 return -EPERM;
937 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
938 (new_serial.flags & ASYNC_USR_MASK));
939 info->custom_divisor = new_serial.custom_divisor;
940 goto check_and_exit;
941 }
942
943 if (info->count > 1)
944 return -EBUSY;
945
946 /*
947 * OK, past this point, all the error checking has been done.
948 * At this point, we start making changes.....
949 */
950
951 info->baud_base = new_serial.baud_base;
952 info->flags = ((info->flags & ~ASYNC_FLAGS) |
953 (new_serial.flags & ASYNC_FLAGS));
954 info->type = new_serial.type;
955 info->close_delay = new_serial.close_delay;
956 info->closing_wait = new_serial.closing_wait;
957
958check_and_exit:
959 retval = startup(info);
960 return retval;
961}
962
963/*
964 * get_lsr_info - get line status register info
965 *
966 * Purpose: Let user call ioctl() to get info when the UART physically
967 * is emptied. On bus types like RS485, the transmitter must
968 * release the bus after transmitting. This must be done when
969 * the transmit shift register is empty, not be done when the
970 * transmit holding register is empty. This functionality
971 * allows an RS485 driver to be written in user space.
972 */
973static int get_lsr_info(struct mcf_serial * info, unsigned int *value)
974{
975 volatile unsigned char *uartp;
976 unsigned long flags;
977 unsigned char status;
978
979 local_irq_save(flags);
980 uartp = info->addr;
981 status = (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY) ? TIOCSER_TEMT : 0;
982 local_irq_restore(flags);
983
984 return put_user(status,value);
985}
986
987/*
988 * This routine sends a break character out the serial port.
989 */
990static void send_break( struct mcf_serial * info, int duration)
991{
992 volatile unsigned char *uartp;
993 unsigned long flags;
994
995 if (!info->addr)
996 return;
997 set_current_state(TASK_INTERRUPTIBLE);
998 uartp = info->addr;
999
1000 local_irq_save(flags);
1001 uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTART;
1002 schedule_timeout(duration);
1003 uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTOP;
1004 local_irq_restore(flags);
1005}
1006
1007static int mcfrs_tiocmget(struct tty_struct *tty, struct file *file)
1008{
1009 struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
1010
1011 if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl"))
1012 return -ENODEV;
1013 if (tty->flags & (1 << TTY_IO_ERROR))
1014 return -EIO;
1015
1016 return mcfrs_getsignals(info);
1017}
1018
1019static int mcfrs_tiocmset(struct tty_struct *tty, struct file *file,
1020 unsigned int set, unsigned int clear)
1021{
1022 struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
1023 int rts = -1, dtr = -1;
1024
1025 if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl"))
1026 return -ENODEV;
1027 if (tty->flags & (1 << TTY_IO_ERROR))
1028 return -EIO;
1029
1030 if (set & TIOCM_RTS)
1031 rts = 1;
1032 if (set & TIOCM_DTR)
1033 dtr = 1;
1034 if (clear & TIOCM_RTS)
1035 rts = 0;
1036 if (clear & TIOCM_DTR)
1037 dtr = 0;
1038
1039 mcfrs_setsignals(info, dtr, rts);
1040
1041 return 0;
1042}
1043
1044static int mcfrs_ioctl(struct tty_struct *tty, struct file * file,
1045 unsigned int cmd, unsigned long arg)
1046{
1047 struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
1048 int retval, error;
1049
1050 if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl"))
1051 return -ENODEV;
1052
1053 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1054 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
1055 (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
1056 if (tty->flags & (1 << TTY_IO_ERROR))
1057 return -EIO;
1058 }
1059
1060 switch (cmd) {
1061 case TCSBRK: /* SVID version: non-zero arg --> no break */
1062 retval = tty_check_change(tty);
1063 if (retval)
1064 return retval;
1065 tty_wait_until_sent(tty, 0);
1066 if (!arg)
1067 send_break(info, HZ/4); /* 1/4 second */
1068 return 0;
1069 case TCSBRKP: /* support for POSIX tcsendbreak() */
1070 retval = tty_check_change(tty);
1071 if (retval)
1072 return retval;
1073 tty_wait_until_sent(tty, 0);
1074 send_break(info, arg ? arg*(HZ/10) : HZ/4);
1075 return 0;
1076 case TIOCGSERIAL:
1077 if (access_ok(VERIFY_WRITE, (void *) arg,
1078 sizeof(struct serial_struct)))
1079 return get_serial_info(info,
1080 (struct serial_struct *) arg);
1081 return -EFAULT;
1082 case TIOCSSERIAL:
1083 return set_serial_info(info,
1084 (struct serial_struct *) arg);
1085 case TIOCSERGETLSR: /* Get line status register */
1086 if (access_ok(VERIFY_WRITE, (void *) arg,
1087 sizeof(unsigned int)))
1088 return get_lsr_info(info, (unsigned int *) arg);
1089 return -EFAULT;
1090 case TIOCSERGSTRUCT:
1091 error = copy_to_user((struct mcf_serial *) arg,
1092 info, sizeof(struct mcf_serial));
1093 if (error)
1094 return -EFAULT;
1095 return 0;
1096
1097#ifdef TIOCSET422
1098 case TIOCSET422: {
1099 unsigned int val;
1100 get_user(val, (unsigned int *) arg);
1101 mcf_setpa(MCFPP_PA11, (val ? 0 : MCFPP_PA11));
1102 break;
1103 }
1104 case TIOCGET422: {
1105 unsigned int val;
1106 val = (mcf_getpa() & MCFPP_PA11) ? 0 : 1;
1107 put_user(val, (unsigned int *) arg);
1108 break;
1109 }
1110#endif
1111
1112 default:
1113 return -ENOIOCTLCMD;
1114 }
1115 return 0;
1116}
1117
1118static void mcfrs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1119{
1120 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
1121
1122 if (tty->termios->c_cflag == old_termios->c_cflag)
1123 return;
1124
1125 mcfrs_change_speed(info);
1126
1127 if ((old_termios->c_cflag & CRTSCTS) &&
1128 !(tty->termios->c_cflag & CRTSCTS)) {
1129 tty->hw_stopped = 0;
1130 mcfrs_setsignals(info, -1, 1);
1131#if 0
1132 mcfrs_start(tty);
1133#endif
1134 }
1135}
1136
1137/*
1138 * ------------------------------------------------------------
1139 * mcfrs_close()
1140 *
1141 * This routine is called when the serial port gets closed. First, we
1142 * wait for the last remaining data to be sent. Then, we unlink its
1143 * S structure from the interrupt chain if necessary, and we free
1144 * that IRQ if nothing is left in the chain.
1145 * ------------------------------------------------------------
1146 */
1147static void mcfrs_close(struct tty_struct *tty, struct file * filp)
1148{
1149 volatile unsigned char *uartp;
1150 struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
1151 unsigned long flags;
1152
1153 if (!info || serial_paranoia_check(info, tty->name, "mcfrs_close"))
1154 return;
1155
1156 local_irq_save(flags);
1157
1158 if (tty_hung_up_p(filp)) {
1159 local_irq_restore(flags);
1160 return;
1161 }
1162
1163#ifdef SERIAL_DEBUG_OPEN
1164 printk("mcfrs_close ttyS%d, count = %d\n", info->line, info->count);
1165#endif
1166 if ((tty->count == 1) && (info->count != 1)) {
1167 /*
1168 * Uh, oh. tty->count is 1, which means that the tty
1169 * structure will be freed. Info->count should always
1170 * be one in these conditions. If it's greater than
1171 * one, we've got real problems, since it means the
1172 * serial port won't be shutdown.
1173 */
1174 printk("MCFRS: bad serial port count; tty->count is 1, "
1175 "info->count is %d\n", info->count);
1176 info->count = 1;
1177 }
1178 if (--info->count < 0) {
1179 printk("MCFRS: bad serial port count for ttyS%d: %d\n",
1180 info->line, info->count);
1181 info->count = 0;
1182 }
1183 if (info->count) {
1184 local_irq_restore(flags);
1185 return;
1186 }
1187 info->flags |= ASYNC_CLOSING;
1188
1189 /*
1190 * Now we wait for the transmit buffer to clear; and we notify
1191 * the line discipline to only process XON/XOFF characters.
1192 */
1193 tty->closing = 1;
1194 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1195 tty_wait_until_sent(tty, info->closing_wait);
1196
1197 /*
1198 * At this point we stop accepting input. To do this, we
1199 * disable the receive line status interrupts, and tell the
1200 * interrupt driver to stop checking the data ready bit in the
1201 * line status register.
1202 */
1203 info->imr &= ~MCFUART_UIR_RXREADY;
1204 uartp = info->addr;
1205 uartp[MCFUART_UIMR] = info->imr;
1206
1207#if 0
1208 /* FIXME: do we need to keep this enabled for console?? */
1209 if (mcfrs_console_inited && (mcfrs_console_port == info->line)) {
1210 /* Do not disable the UART */ ;
1211 } else
1212#endif
1213 shutdown(info);
1214 mcfrs_flush_buffer(tty);
1215 tty_ldisc_flush(tty);
1216
1217 tty->closing = 0;
1218 info->event = 0;
1219 info->port.tty = NULL;
1220#if 0
1221 if (tty->ldisc.num != ldiscs[N_TTY].num) {
1222 if (tty->ldisc.close)
1223 (tty->ldisc.close)(tty);
1224 tty->ldisc = ldiscs[N_TTY];
1225 tty->termios->c_line = N_TTY;
1226 if (tty->ldisc.open)
1227 (tty->ldisc.open)(tty);
1228 }
1229#endif
1230 if (info->blocked_open) {
1231 if (info->close_delay) {
1232 msleep_interruptible(jiffies_to_msecs(info->close_delay));
1233 }
1234 wake_up_interruptible(&info->open_wait);
1235 }
1236 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1237 wake_up_interruptible(&info->close_wait);
1238 local_irq_restore(flags);
1239}
1240
1241/*
1242 * mcfrs_wait_until_sent() --- wait until the transmitter is empty
1243 */
1244static void
1245mcfrs_wait_until_sent(struct tty_struct *tty, int timeout)
1246{
1247#ifdef CONFIG_M5272
1248#define MCF5272_FIFO_SIZE 25 /* fifo size + shift reg */
1249
1250 struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
1251 volatile unsigned char *uartp;
1252 unsigned long orig_jiffies, fifo_time, char_time, fifo_cnt;
1253
1254 if (serial_paranoia_check(info, tty->name, "mcfrs_wait_until_sent"))
1255 return;
1256
1257 orig_jiffies = jiffies;
1258
1259 /*
1260 * Set the check interval to be 1/5 of the approximate time
1261 * to send the entire fifo, and make it at least 1. The check
1262 * interval should also be less than the timeout.
1263 *
1264 * Note: we have to use pretty tight timings here to satisfy
1265 * the NIST-PCTS.
1266 */
1267 lock_kernel();
1268
1269 fifo_time = (MCF5272_FIFO_SIZE * HZ * 10) / info->baud;
1270 char_time = fifo_time / 5;
1271 if (char_time == 0)
1272 char_time = 1;
1273 if (timeout && timeout < char_time)
1274 char_time = timeout;
1275
1276 /*
1277 * Clamp the timeout period at 2 * the time to empty the
1278 * fifo. Just to be safe, set the minimum at .5 seconds.
1279 */
1280 fifo_time *= 2;
1281 if (fifo_time < (HZ/2))
1282 fifo_time = HZ/2;
1283 if (!timeout || timeout > fifo_time)
1284 timeout = fifo_time;
1285
1286 /*
1287 * Account for the number of bytes in the UART
1288 * transmitter FIFO plus any byte being shifted out.
1289 */
1290 uartp = (volatile unsigned char *) info->addr;
1291 for (;;) {
1292 fifo_cnt = (uartp[MCFUART_UTF] & MCFUART_UTF_TXB);
1293 if ((uartp[MCFUART_USR] & (MCFUART_USR_TXREADY|
1294 MCFUART_USR_TXEMPTY)) ==
1295 MCFUART_USR_TXREADY)
1296 fifo_cnt++;
1297 if (fifo_cnt == 0)
1298 break;
1299 msleep_interruptible(jiffies_to_msecs(char_time));
1300 if (signal_pending(current))
1301 break;
1302 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1303 break;
1304 }
1305 unlock_kernel();
1306#else
1307 /*
1308 * For the other coldfire models, assume all data has been sent
1309 */
1310#endif
1311}
1312
1313/*
1314 * mcfrs_hangup() --- called by tty_hangup() when a hangup is signaled.
1315 */
1316void mcfrs_hangup(struct tty_struct *tty)
1317{
1318 struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
1319
1320 if (serial_paranoia_check(info, tty->name, "mcfrs_hangup"))
1321 return;
1322
1323 mcfrs_flush_buffer(tty);
1324 shutdown(info);
1325 info->event = 0;
1326 info->count = 0;
1327 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1328 info->port.tty = NULL;
1329 wake_up_interruptible(&info->open_wait);
1330}
1331
1332/*
1333 * ------------------------------------------------------------
1334 * mcfrs_open() and friends
1335 * ------------------------------------------------------------
1336 */
1337static int block_til_ready(struct tty_struct *tty, struct file * filp,
1338 struct mcf_serial *info)
1339{
1340 DECLARE_WAITQUEUE(wait, current);
1341 int retval;
1342 int do_clocal = 0;
1343
1344 /*
1345 * If the device is in the middle of being closed, then block
1346 * until it's done, and then try again.
1347 */
1348 if (info->flags & ASYNC_CLOSING) {
1349 interruptible_sleep_on(&info->close_wait);
1350#ifdef SERIAL_DO_RESTART
1351 if (info->flags & ASYNC_HUP_NOTIFY)
1352 return -EAGAIN;
1353 else
1354 return -ERESTARTSYS;
1355#else
1356 return -EAGAIN;
1357#endif
1358 }
1359
1360 /*
1361 * If non-blocking mode is set, or the port is not enabled,
1362 * then make the check up front and then exit.
1363 */
1364 if ((filp->f_flags & O_NONBLOCK) ||
1365 (tty->flags & (1 << TTY_IO_ERROR))) {
1366 info->flags |= ASYNC_NORMAL_ACTIVE;
1367 return 0;
1368 }
1369
1370 if (tty->termios->c_cflag & CLOCAL)
1371 do_clocal = 1;
1372
1373 /*
1374 * Block waiting for the carrier detect and the line to become
1375 * free (i.e., not in use by the callout). While we are in
1376 * this loop, info->count is dropped by one, so that
1377 * mcfrs_close() knows when to free things. We restore it upon
1378 * exit, either normal or abnormal.
1379 */
1380 retval = 0;
1381 add_wait_queue(&info->open_wait, &wait);
1382#ifdef SERIAL_DEBUG_OPEN
1383 printk("block_til_ready before block: ttyS%d, count = %d\n",
1384 info->line, info->count);
1385#endif
1386 info->count--;
1387 info->blocked_open++;
1388 while (1) {
1389 local_irq_disable();
1390 mcfrs_setsignals(info, 1, 1);
1391 local_irq_enable();
1392 current->state = TASK_INTERRUPTIBLE;
1393 if (tty_hung_up_p(filp) ||
1394 !(info->flags & ASYNC_INITIALIZED)) {
1395#ifdef SERIAL_DO_RESTART
1396 if (info->flags & ASYNC_HUP_NOTIFY)
1397 retval = -EAGAIN;
1398 else
1399 retval = -ERESTARTSYS;
1400#else
1401 retval = -EAGAIN;
1402#endif
1403 break;
1404 }
1405 if (!(info->flags & ASYNC_CLOSING) &&
1406 (do_clocal || (mcfrs_getsignals(info) & TIOCM_CD)))
1407 break;
1408 if (signal_pending(current)) {
1409 retval = -ERESTARTSYS;
1410 break;
1411 }
1412#ifdef SERIAL_DEBUG_OPEN
1413 printk("block_til_ready blocking: ttyS%d, count = %d\n",
1414 info->line, info->count);
1415#endif
1416 schedule();
1417 }
1418 current->state = TASK_RUNNING;
1419 remove_wait_queue(&info->open_wait, &wait);
1420 if (!tty_hung_up_p(filp))
1421 info->count++;
1422 info->blocked_open--;
1423#ifdef SERIAL_DEBUG_OPEN
1424 printk("block_til_ready after blocking: ttyS%d, count = %d\n",
1425 info->line, info->count);
1426#endif
1427 if (retval)
1428 return retval;
1429 info->flags |= ASYNC_NORMAL_ACTIVE;
1430 return 0;
1431}
1432
1433/*
1434 * This routine is called whenever a serial port is opened. It
1435 * enables interrupts for a serial port, linking in its structure into
1436 * the IRQ chain. It also performs the serial-specific
1437 * initialization for the tty structure.
1438 */
1439int mcfrs_open(struct tty_struct *tty, struct file * filp)
1440{
1441 struct mcf_serial *info;
1442 int retval, line;
1443
1444 line = tty->index;
1445 if ((line < 0) || (line >= NR_PORTS))
1446 return -ENODEV;
1447 info = mcfrs_table + line;
1448 if (serial_paranoia_check(info, tty->name, "mcfrs_open"))
1449 return -ENODEV;
1450#ifdef SERIAL_DEBUG_OPEN
1451 printk("mcfrs_open %s, count = %d\n", tty->name, info->count);
1452#endif
1453 info->count++;
1454 tty->driver_data = info;
1455 info->port.tty = tty;
1456
1457 /*
1458 * Start up serial port
1459 */
1460 retval = startup(info);
1461 if (retval)
1462 return retval;
1463
1464 retval = block_til_ready(tty, filp, info);
1465 if (retval) {
1466#ifdef SERIAL_DEBUG_OPEN
1467 printk("mcfrs_open returning after block_til_ready with %d\n",
1468 retval);
1469#endif
1470 return retval;
1471 }
1472
1473#ifdef SERIAL_DEBUG_OPEN
1474 printk("mcfrs_open %s successful...\n", tty->name);
1475#endif
1476 return 0;
1477}
1478
1479/*
1480 * Based on the line number set up the internal interrupt stuff.
1481 */
1482static void mcfrs_irqinit(struct mcf_serial *info)
1483{
1484#if defined(CONFIG_M5272)
1485 volatile unsigned long *icrp;
1486 volatile unsigned long *portp;
1487 volatile unsigned char *uartp;
1488
1489 uartp = info->addr;
1490 icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR2);
1491
1492 switch (info->line) {
1493 case 0:
1494 *icrp = 0xe0000000;
1495 break;
1496 case 1:
1497 *icrp = 0x0e000000;
1498 break;
1499 default:
1500 printk("MCFRS: don't know how to handle UART %d interrupt?\n",
1501 info->line);
1502 return;
1503 }
1504
1505 /* Enable the output lines for the serial ports */
1506 portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PBCNT);
1507 *portp = (*portp & ~0x000000ff) | 0x00000055;
1508 portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PDCNT);
1509 *portp = (*portp & ~0x000003fc) | 0x000002a8;
1510#elif defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
1511 volatile unsigned char *icrp, *uartp;
1512 volatile unsigned long *imrp;
1513
1514 uartp = info->addr;
1515
1516 icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 +
1517 MCFINTC_ICR0 + MCFINT_UART0 + info->line);
1518 *icrp = 0x30 + info->line; /* level 6, line based priority */
1519
1520 imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 +
1521 MCFINTC_IMRL);
1522 *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1);
1523#if defined(CONFIG_M527x)
1524 {
1525 /*
1526 * External Pin Mask Setting & Enable External Pin for Interface
1527 * mrcbis@aliceposta.it
1528 */
1529 u16 *serpin_enable_mask;
1530 serpin_enable_mask = (u16 *) (MCF_IPSBAR + MCF_GPIO_PAR_UART);
1531 if (info->line == 0)
1532 *serpin_enable_mask |= UART0_ENABLE_MASK;
1533 else if (info->line == 1)
1534 *serpin_enable_mask |= UART1_ENABLE_MASK;
1535 else if (info->line == 2)
1536 *serpin_enable_mask |= UART2_ENABLE_MASK;
1537 }
1538#endif
1539#if defined(CONFIG_M528x)
1540 /* make sure PUAPAR is set for UART0 and UART1 */
1541 if (info->line < 2) {
1542 volatile unsigned char *portp = (volatile unsigned char *) (MCF_MBAR + MCF5282_GPIO_PUAPAR);
1543 *portp |= (0x03 << (info->line * 2));
1544 }
1545#endif
1546#elif defined(CONFIG_M520x)
1547 volatile unsigned char *icrp, *uartp;
1548 volatile unsigned long *imrp;
1549
1550 uartp = info->addr;
1551
1552 icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 +
1553 MCFINTC_ICR0 + MCFINT_UART0 + info->line);
1554 *icrp = 0x03;
1555
1556 imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 +
1557 MCFINTC_IMRL);
1558 *imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1);
1559 if (info->line < 2) {
1560 unsigned short *uart_par;
1561 uart_par = (unsigned short *)(MCF_IPSBAR + MCF_GPIO_PAR_UART);
1562 if (info->line == 0)
1563 *uart_par |= MCF_GPIO_PAR_UART_PAR_UTXD0
1564 | MCF_GPIO_PAR_UART_PAR_URXD0;
1565 else if (info->line == 1)
1566 *uart_par |= MCF_GPIO_PAR_UART_PAR_UTXD1
1567 | MCF_GPIO_PAR_UART_PAR_URXD1;
1568 } else if (info->line == 2) {
1569 unsigned char *feci2c_par;
1570 feci2c_par = (unsigned char *)(MCF_IPSBAR + MCF_GPIO_PAR_FECI2C);
1571 *feci2c_par &= ~0x0F;
1572 *feci2c_par |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2
1573 | MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
1574 }
1575#elif defined(CONFIG_M532x)
1576 volatile unsigned char *uartp;
1577 uartp = info->addr;
1578 switch (info->line) {
1579 case 0:
1580 MCF_INTC0_ICR26 = 0x3;
1581 MCF_INTC0_CIMR = 26;
1582 /* GPIO initialization */
1583 MCF_GPIO_PAR_UART |= 0x000F;
1584 break;
1585 case 1:
1586 MCF_INTC0_ICR27 = 0x3;
1587 MCF_INTC0_CIMR = 27;
1588 /* GPIO initialization */
1589 MCF_GPIO_PAR_UART |= 0x0FF0;
1590 break;
1591 case 2:
1592 MCF_INTC0_ICR28 = 0x3;
1593 MCF_INTC0_CIMR = 28;
1594 /* GPIOs also must be initalized, depends on board */
1595 break;
1596 }
1597#else
1598 volatile unsigned char *icrp, *uartp;
1599
1600 switch (info->line) {
1601 case 0:
1602 icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART1ICR);
1603 *icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 |
1604 MCFSIM_ICR_PRI1;
1605 mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART1);
1606 break;
1607 case 1:
1608 icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART2ICR);
1609 *icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 |
1610 MCFSIM_ICR_PRI2;
1611 mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART2);
1612 break;
1613 default:
1614 printk("MCFRS: don't know how to handle UART %d interrupt?\n",
1615 info->line);
1616 return;
1617 }
1618
1619 uartp = info->addr;
1620 uartp[MCFUART_UIVR] = info->irq;
1621#endif
1622
1623 /* Clear mask, so no surprise interrupts. */
1624 uartp[MCFUART_UIMR] = 0;
1625
1626 if (request_irq(info->irq, mcfrs_interrupt, IRQF_DISABLED,
1627 "ColdFire UART", NULL)) {
1628 printk("MCFRS: Unable to attach ColdFire UART %d interrupt "
1629 "vector=%d\n", info->line, info->irq);
1630 }
1631
1632 return;
1633}
1634
1635
1636char *mcfrs_drivername = "ColdFire internal UART serial driver version 1.00\n";
1637
1638
1639/*
1640 * Serial stats reporting...
1641 */
1642int mcfrs_readproc(char *page, char **start, off_t off, int count,
1643 int *eof, void *data)
1644{
1645 struct mcf_serial *info;
1646 char str[20];
1647 int len, sigs, i;
1648
1649 len = sprintf(page, mcfrs_drivername);
1650 for (i = 0; (i < NR_PORTS); i++) {
1651 info = &mcfrs_table[i];
1652 len += sprintf((page + len), "%d: port:%x irq=%d baud:%d ",
1653 i, (unsigned int) info->addr, info->irq, info->baud);
1654 if (info->stats.rx || info->stats.tx)
1655 len += sprintf((page + len), "tx:%d rx:%d ",
1656 info->stats.tx, info->stats.rx);
1657 if (info->stats.rxframing)
1658 len += sprintf((page + len), "fe:%d ",
1659 info->stats.rxframing);
1660 if (info->stats.rxparity)
1661 len += sprintf((page + len), "pe:%d ",
1662 info->stats.rxparity);
1663 if (info->stats.rxbreak)
1664 len += sprintf((page + len), "brk:%d ",
1665 info->stats.rxbreak);
1666 if (info->stats.rxoverrun)
1667 len += sprintf((page + len), "oe:%d ",
1668 info->stats.rxoverrun);
1669
1670 str[0] = str[1] = 0;
1671 if ((sigs = mcfrs_getsignals(info))) {
1672 if (sigs & TIOCM_RTS)
1673 strcat(str, "|RTS");
1674 if (sigs & TIOCM_CTS)
1675 strcat(str, "|CTS");
1676 if (sigs & TIOCM_DTR)
1677 strcat(str, "|DTR");
1678 if (sigs & TIOCM_CD)
1679 strcat(str, "|CD");
1680 }
1681
1682 len += sprintf((page + len), "%s\n", &str[1]);
1683 }
1684
1685 return(len);
1686}
1687
1688
1689/* Finally, routines used to initialize the serial driver. */
1690
1691static void show_serial_version(void)
1692{
1693 printk(mcfrs_drivername);
1694}
1695
1696static const struct tty_operations mcfrs_ops = {
1697 .open = mcfrs_open,
1698 .close = mcfrs_close,
1699 .write = mcfrs_write,
1700 .flush_chars = mcfrs_flush_chars,
1701 .write_room = mcfrs_write_room,
1702 .chars_in_buffer = mcfrs_chars_in_buffer,
1703 .flush_buffer = mcfrs_flush_buffer,
1704 .ioctl = mcfrs_ioctl,
1705 .throttle = mcfrs_throttle,
1706 .unthrottle = mcfrs_unthrottle,
1707 .set_termios = mcfrs_set_termios,
1708 .stop = mcfrs_stop,
1709 .start = mcfrs_start,
1710 .hangup = mcfrs_hangup,
1711 .read_proc = mcfrs_readproc,
1712 .wait_until_sent = mcfrs_wait_until_sent,
1713 .tiocmget = mcfrs_tiocmget,
1714 .tiocmset = mcfrs_tiocmset,
1715};
1716
1717/* mcfrs_init inits the driver */
1718static int __init
1719mcfrs_init(void)
1720{
1721 struct mcf_serial *info;
1722 unsigned long flags;
1723 int i;
1724
1725 /* Setup base handler, and timer table. */
1726#ifdef MCFPP_DCD0
1727 init_timer(&mcfrs_timer_struct);
1728 mcfrs_timer_struct.function = mcfrs_timer;
1729 mcfrs_timer_struct.data = 0;
1730 mcfrs_timer_struct.expires = jiffies + HZ/25;
1731 add_timer(&mcfrs_timer_struct);
1732 mcfrs_ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1);
1733#endif
1734 mcfrs_serial_driver = alloc_tty_driver(NR_PORTS);
1735 if (!mcfrs_serial_driver)
1736 return -ENOMEM;
1737
1738 show_serial_version();
1739
1740 /* Initialize the tty_driver structure */
1741 mcfrs_serial_driver->owner = THIS_MODULE;
1742 mcfrs_serial_driver->name = "ttyS";
1743 mcfrs_serial_driver->driver_name = "mcfserial";
1744 mcfrs_serial_driver->major = TTY_MAJOR;
1745 mcfrs_serial_driver->minor_start = 64;
1746 mcfrs_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
1747 mcfrs_serial_driver->subtype = SERIAL_TYPE_NORMAL;
1748 mcfrs_serial_driver->init_termios = tty_std_termios;
1749
1750 mcfrs_serial_driver->init_termios.c_cflag =
1751 mcfrs_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL;
1752 mcfrs_serial_driver->flags = TTY_DRIVER_REAL_RAW;
1753
1754 tty_set_operations(mcfrs_serial_driver, &mcfrs_ops);
1755
1756 if (tty_register_driver(mcfrs_serial_driver)) {
1757 printk("MCFRS: Couldn't register serial driver\n");
1758 put_tty_driver(mcfrs_serial_driver);
1759 return(-EBUSY);
1760 }
1761
1762 local_irq_save(flags);
1763
1764 /*
1765 * Configure all the attached serial ports.
1766 */
1767 for (i = 0, info = mcfrs_table; (i < NR_PORTS); i++, info++) {
1768 info->magic = SERIAL_MAGIC;
1769 info->line = i;
1770 info->port.tty = NULL;
1771 info->custom_divisor = 16;
1772 info->close_delay = 50;
1773 info->closing_wait = 3000;
1774 info->x_char = 0;
1775 info->event = 0;
1776 info->count = 0;
1777 info->blocked_open = 0;
1778 INIT_WORK(&info->tqueue, mcfrs_offintr);
1779 INIT_WORK(&info->tqueue_hangup, do_serial_hangup);
1780 init_waitqueue_head(&info->open_wait);
1781 init_waitqueue_head(&info->close_wait);
1782
1783 info->imr = 0;
1784 mcfrs_setsignals(info, 0, 0);
1785 mcfrs_irqinit(info);
1786
1787 printk("ttyS%d at 0x%04x (irq = %d)", info->line,
1788 (unsigned int) info->addr, info->irq);
1789 printk(" is a builtin ColdFire UART\n");
1790 }
1791
1792 local_irq_restore(flags);
1793 return 0;
1794}
1795
1796module_init(mcfrs_init);
1797
1798/****************************************************************************/
1799/* Serial Console */
1800/****************************************************************************/
1801
1802/*
1803 * Quick and dirty UART initialization, for console output.
1804 */
1805
1806void mcfrs_init_console(void)
1807{
1808 volatile unsigned char *uartp;
1809 unsigned int clk;
1810
1811 /*
1812 * Reset UART, get it into known state...
1813 */
1814 uartp = (volatile unsigned char *) (MCF_MBAR +
1815 (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1));
1816
1817 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
1818 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
1819 uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */
1820
1821 /*
1822 * Set port for defined baud , 8 data bits, 1 stop bit, no parity.
1823 */
1824 uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
1825 uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
1826
1827#ifdef CONFIG_M5272
1828{
1829 /*
1830 * For the MCF5272, also compute the baudrate fraction.
1831 */
1832 int fraction = MCF_BUSCLK - (clk * 32 * mcfrs_console_baud);
1833 fraction *= 16;
1834 fraction /= (32 * mcfrs_console_baud);
1835 uartp[MCFUART_UFPD] = (fraction & 0xf); /* set fraction */
1836 clk = (MCF_BUSCLK / mcfrs_console_baud) / 32;
1837}
1838#else
1839 clk = ((MCF_BUSCLK / mcfrs_console_baud) + 16) / 32; /* set baud */
1840#endif
1841
1842 uartp[MCFUART_UBG1] = (clk & 0xff00) >> 8; /* set msb baud */
1843 uartp[MCFUART_UBG2] = (clk & 0xff); /* set lsb baud */
1844 uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
1845 uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
1846
1847 mcfrs_console_inited++;
1848 return;
1849}
1850
1851
1852/*
1853 * Setup for console. Argument comes from the boot command line.
1854 */
1855
1856int mcfrs_console_setup(struct console *cp, char *arg)
1857{
1858 int i, n = CONSOLE_BAUD_RATE;
1859
1860 if (!cp)
1861 return(-1);
1862
1863 if (!strncmp(cp->name, "ttyS", 4))
1864 mcfrs_console_port = cp->index;
1865 else if (!strncmp(cp->name, "cua", 3))
1866 mcfrs_console_port = cp->index;
1867 else
1868 return(-1);
1869
1870 if (arg)
1871 n = simple_strtoul(arg,NULL,0);
1872 for (i = 0; i < MCFRS_BAUD_TABLE_SIZE; i++)
1873 if (mcfrs_baud_table[i] == n)
1874 break;
1875 if (i < MCFRS_BAUD_TABLE_SIZE) {
1876 mcfrs_console_baud = n;
1877 mcfrs_console_cbaud = 0;
1878 if (i > 15) {
1879 mcfrs_console_cbaud |= CBAUDEX;
1880 i -= 15;
1881 }
1882 mcfrs_console_cbaud |= i;
1883 }
1884 mcfrs_init_console(); /* make sure baud rate changes */
1885 return(0);
1886}
1887
1888
1889static struct tty_driver *mcfrs_console_device(struct console *c, int *index)
1890{
1891 *index = c->index;
1892 return mcfrs_serial_driver;
1893}
1894
1895
1896/*
1897 * Output a single character, using UART polled mode.
1898 * This is used for console output.
1899 */
1900
1901int mcfrs_put_char(char ch)
1902{
1903 volatile unsigned char *uartp;
1904 unsigned long flags;
1905 int i;
1906
1907 uartp = (volatile unsigned char *) (MCF_MBAR +
1908 (mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1));
1909
1910 local_irq_save(flags);
1911 for (i = 0; (i < 0x10000); i++) {
1912 if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY)
1913 break;
1914 }
1915 if (i < 0x10000) {
1916 uartp[MCFUART_UTB] = ch;
1917 for (i = 0; (i < 0x10000); i++)
1918 if (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY)
1919 break;
1920 }
1921 if (i >= 0x10000)
1922 mcfrs_init_console(); /* try and get it back */
1923 local_irq_restore(flags);
1924
1925 return 1;
1926}
1927
1928
1929/*
1930 * rs_console_write is registered for printk output.
1931 */
1932
1933void mcfrs_console_write(struct console *cp, const char *p, unsigned len)
1934{
1935 if (!mcfrs_console_inited)
1936 mcfrs_init_console();
1937 while (len-- > 0) {
1938 if (*p == '\n')
1939 mcfrs_put_char('\r');
1940 mcfrs_put_char(*p++);
1941 }
1942}
1943
1944/*
1945 * declare our consoles
1946 */
1947
1948struct console mcfrs_console = {
1949 .name = "ttyS",
1950 .write = mcfrs_console_write,
1951 .device = mcfrs_console_device,
1952 .setup = mcfrs_console_setup,
1953 .flags = CON_PRINTBUFFER,
1954 .index = -1,
1955};
1956
1957static int __init mcfrs_console_init(void)
1958{
1959 register_console(&mcfrs_console);
1960 return 0;
1961}
1962
1963console_initcall(mcfrs_console_init);
1964
1965/****************************************************************************/
diff --git a/drivers/serial/mcfserial.h b/drivers/serial/mcfserial.h
deleted file mode 100644
index 56420e2cb110..000000000000
--- a/drivers/serial/mcfserial.h
+++ /dev/null
@@ -1,74 +0,0 @@
1/*
2 * mcfserial.c -- serial driver for ColdFire internal UARTS.
3 *
4 * Copyright (c) 1999 Greg Ungerer <gerg@snapgear.com>
5 * Copyright (c) 2000-2001 Lineo, Inc. <www.lineo.com>
6 * Copyright (c) 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#ifndef _MCF_SERIAL_H
15#define _MCF_SERIAL_H
16
17#include <linux/serial.h>
18
19#ifdef __KERNEL__
20
21/*
22 * Define a local serial stats structure.
23 */
24
25struct mcf_stats {
26 unsigned int rx;
27 unsigned int tx;
28 unsigned int rxbreak;
29 unsigned int rxframing;
30 unsigned int rxparity;
31 unsigned int rxoverrun;
32};
33
34
35/*
36 * This is our internal structure for each serial port's state.
37 * Each serial port has one of these structures associated with it.
38 */
39
40struct mcf_serial {
41 int magic;
42 volatile unsigned char *addr; /* UART memory address */
43 int irq;
44 int flags; /* defined in tty.h */
45 int type; /* UART type */
46 struct tty_struct *tty;
47 unsigned char imr; /* Software imr register */
48 unsigned int baud;
49 int sigs;
50 int custom_divisor;
51 int x_char; /* xon/xoff character */
52 int baud_base;
53 int close_delay;
54 unsigned short closing_wait;
55 unsigned short closing_wait2;
56 unsigned long event;
57 int line;
58 int count; /* # of fd on device */
59 int blocked_open; /* # of blocked opens */
60 unsigned char *xmit_buf;
61 int xmit_head;
62 int xmit_tail;
63 int xmit_cnt;
64 struct mcf_stats stats;
65 struct work_struct tqueue;
66 struct work_struct tqueue_hangup;
67 wait_queue_head_t open_wait;
68 wait_queue_head_t close_wait;
69
70};
71
72#endif /* __KERNEL__ */
73
74#endif /* _MCF_SERIAL_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-02 00:23:13 -0400