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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / char / serial167.c
blobdf8cd0ca97ebcc5d8728ab36ffcdeabcd899c4f3
1 /*
2 * linux/drivers/char/serial167.c
3 *
4 * Driver for MVME166/7 board serial ports, which are via a CD2401.
5 * Based very much on cyclades.c.
6 *
7 * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk]
8 *
9 * ==============================================================
10 *
11 * static char rcsid[] =
12 * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $";
13 *
14 * linux/kernel/cyclades.c
15 *
16 * Maintained by Marcio Saito (cyclades@netcom.com) and
17 * Randolph Bentson (bentson@grieg.seaslug.org)
18 *
19 * Much of the design and some of the code came from serial.c
20 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
21 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
22 * and then fixed as suggested by Michael K. Johnson 12/12/92.
23 *
24 * This version does not support shared irq's.
25 *
26 * $Log: cyclades.c,v $
27 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
28 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
29 *
30 * Changes:
31 *
32 * 200 lines of changes record removed - RGH 11-10-95, starting work on
33 * converting this to drive serial ports on mvme166 (cd2401).
34 *
35 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25
36 * - get rid of verify_area
37 * - use get_user to access memory from userspace in set_threshold,
38 * set_default_threshold and set_timeout
39 * - don't use the panic function in serial167_init
40 * - do resource release on failure on serial167_init
41 * - include missing restore_flags in mvme167_serial_console_setup
42 *
43 * Kars de Jong <jongk@linux-m68k.org> - 2004/09/06
44 * - replace bottom half handler with task queue handler
45 */
46
47 #include <linux/errno.h>
48 #include <linux/signal.h>
49 #include <linux/sched.h>
50 #include <linux/timer.h>
51 #include <linux/tty.h>
52 #include <linux/interrupt.h>
53 #include <linux/serial.h>
54 #include <linux/serialP.h>
55 #include <linux/string.h>
56 #include <linux/fcntl.h>
57 #include <linux/ptrace.h>
58 #include <linux/serial167.h>
59 #include <linux/delay.h>
60 #include <linux/major.h>
61 #include <linux/mm.h>
62 #include <linux/console.h>
63 #include <linux/module.h>
64 #include <linux/bitops.h>
65 #include <linux/tty_flip.h>
66
67 #include <asm/system.h>
68 #include <asm/io.h>
69 #include <asm/mvme16xhw.h>
70 #include <asm/bootinfo.h>
71 #include <asm/setup.h>
72
73 #include <linux/types.h>
74 #include <linux/kernel.h>
75
76 #include <asm/uaccess.h>
77 #include <linux/init.h>
78
79 #define SERIAL_PARANOIA_CHECK
80 #undef SERIAL_DEBUG_OPEN
81 #undef SERIAL_DEBUG_THROTTLE
82 #undef SERIAL_DEBUG_OTHER
83 #undef SERIAL_DEBUG_IO
84 #undef SERIAL_DEBUG_COUNT
85 #undef SERIAL_DEBUG_DTR
86 #undef CYCLOM_16Y_HACK
87 #define CYCLOM_ENABLE_MONITORING
88
89 #define WAKEUP_CHARS 256
90
91 #define STD_COM_FLAGS (0)
92
93 static struct tty_driver *cy_serial_driver;
94 extern int serial_console;
95 static struct cyclades_port *serial_console_info = NULL;
96 static unsigned int serial_console_cflag = 0;
97 u_char initial_console_speed;
98
99 /* Base address of cd2401 chip on mvme166/7 */
100
101 #define BASE_ADDR (0xfff45000)
102 #define pcc2chip ((volatile u_char *)0xfff42000)
103 #define PccSCCMICR 0x1d
104 #define PccSCCTICR 0x1e
105 #define PccSCCRICR 0x1f
106 #define PccTPIACKR 0x25
107 #define PccRPIACKR 0x27
108 #define PccIMLR 0x3f
109
110 /* This is the per-port data structure */
111 struct cyclades_port cy_port[] = {
112 /* CARD# */
113 {-1}, /* ttyS0 */
114 {-1}, /* ttyS1 */
115 {-1}, /* ttyS2 */
116 {-1}, /* ttyS3 */
117 };
118
119 #define NR_PORTS ARRAY_SIZE(cy_port)
120
121 /*
122 * This is used to look up the divisor speeds and the timeouts
123 * We're normally limited to 15 distinct baud rates. The extra
124 * are accessed via settings in info->flags.
125 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
126 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
127 * HI VHI
128 */
129 static int baud_table[] = {
130 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
131 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
132 0
133 };
134
135 #if 0
136 static char baud_co[] = { /* 25 MHz clock option table */
137 /* value => 00 01 02 03 04 */
138 /* divide by 8 32 128 512 2048 */
139 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
140 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
141 };
142
143 static char baud_bpr[] = { /* 25 MHz baud rate period table */
144 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
145 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
146 };
147 #endif
148
149 /* I think 166 brd clocks 2401 at 20MHz.... */
150
151 /* These values are written directly to tcor, and >> 5 for writing to rcor */
152 static u_char baud_co[] = { /* 20 MHz clock option table */
153 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40,
154 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
155 };
156
157 /* These values written directly to tbpr/rbpr */
158 static u_char baud_bpr[] = { /* 20 MHz baud rate period table */
159 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81,
160 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10
161 };
162
163 static u_char baud_cor4[] = { /* receive threshold */
164 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
165 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07
166 };
167
168 static void shutdown(struct cyclades_port *);
169 static int startup(struct cyclades_port *);
170 static void cy_throttle(struct tty_struct *);
171 static void cy_unthrottle(struct tty_struct *);
172 static void config_setup(struct cyclades_port *);
173 extern void console_print(const char *);
174 #ifdef CYCLOM_SHOW_STATUS
175 static void show_status(int);
176 #endif
177
178 #ifdef CONFIG_REMOTE_DEBUG
179 static void debug_setup(void);
180 void queueDebugChar(int c);
181 int getDebugChar(void);
182
183 #define DEBUG_PORT 1
184 #define DEBUG_LEN 256
185
186 typedef struct {
187 int in;
188 int out;
189 unsigned char buf[DEBUG_LEN];
190 } debugq;
191
192 debugq debugiq;
193 #endif
194
195 /*
196 * I have my own version of udelay(), as it is needed when initialising
197 * the chip, before the delay loop has been calibrated. Should probably
198 * reference one of the vmechip2 or pccchip2 counter for an accurate
199 * delay, but this wild guess will do for now.
200 */
201
202 void my_udelay(long us)
203 {
204 u_char x;
205 volatile u_char *p = &x;
206 int i;
207
208 while (us--)
209 for (i = 100; i; i--)
210 x |= *p;
211 }
212
213 static inline int serial_paranoia_check(struct cyclades_port *info, char *name,
214 const char *routine)
215 {
216 #ifdef SERIAL_PARANOIA_CHECK
217 if (!info) {
218 printk("Warning: null cyclades_port for (%s) in %s\n", name,
219 routine);
220 return 1;
221 }
222
223 if ((long)info < (long)(&cy_port[0])
224 || (long)(&cy_port[NR_PORTS]) < (long)info) {
225 printk("Warning: cyclades_port out of range for (%s) in %s\n",
226 name, routine);
227 return 1;
228 }
229
230 if (info->magic != CYCLADES_MAGIC) {
231 printk("Warning: bad magic number for serial struct (%s) in "
232 "%s\n", name, routine);
233 return 1;
234 }
235 #endif
236 return 0;
237 } /* serial_paranoia_check */
238
239 #if 0
240 /* The following diagnostic routines allow the driver to spew
241 information on the screen, even (especially!) during interrupts.
242 */
243 void SP(char *data)
244 {
245 unsigned long flags;
246 local_irq_save(flags);
247 console_print(data);
248 local_irq_restore(flags);
249 }
250
251 char scrn[2];
252 void CP(char data)
253 {
254 unsigned long flags;
255 local_irq_save(flags);
256 scrn[0] = data;
257 console_print(scrn);
258 local_irq_restore(flags);
259 } /* CP */
260
261 void CP1(int data)
262 {
263 (data < 10) ? CP(data + '0') : CP(data + 'A' - 10);
264 } /* CP1 */
265 void CP2(int data)
266 {
267 CP1((data >> 4) & 0x0f);
268 CP1(data & 0x0f);
269 } /* CP2 */
270 void CP4(int data)
271 {
272 CP2((data >> 8) & 0xff);
273 CP2(data & 0xff);
274 } /* CP4 */
275 void CP8(long data)
276 {
277 CP4((data >> 16) & 0xffff);
278 CP4(data & 0xffff);
279 } /* CP8 */
280 #endif
281
282 /* This routine waits up to 1000 micro-seconds for the previous
283 command to the Cirrus chip to complete and then issues the
284 new command. An error is returned if the previous command
285 didn't finish within the time limit.
286 */
287 u_short write_cy_cmd(volatile u_char * base_addr, u_char cmd)
288 {
289 unsigned long flags;
290 volatile int i;
291
292 local_irq_save(flags);
293 /* Check to see that the previous command has completed */
294 for (i = 0; i < 100; i++) {
295 if (base_addr[CyCCR] == 0) {
296 break;
297 }
298 my_udelay(10L);
299 }
300 /* if the CCR never cleared, the previous command
301 didn't finish within the "reasonable time" */
302 if (i == 10) {
303 local_irq_restore(flags);
304 return (-1);
305 }
306
307 /* Issue the new command */
308 base_addr[CyCCR] = cmd;
309 local_irq_restore(flags);
310 return (0);
311 } /* write_cy_cmd */
312
313 /* cy_start and cy_stop provide software output flow control as a
314 function of XON/XOFF, software CTS, and other such stuff. */
315
316 static void cy_stop(struct tty_struct *tty)
317 {
318 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
319 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
320 int channel;
321 unsigned long flags;
322
323 #ifdef SERIAL_DEBUG_OTHER
324 printk("cy_stop %s\n", tty->name); /* */
325 #endif
326
327 if (serial_paranoia_check(info, tty->name, "cy_stop"))
328 return;
329
330 channel = info->line;
331
332 local_irq_save(flags);
333 base_addr[CyCAR] = (u_char) (channel); /* index channel */
334 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
335 local_irq_restore(flags);
336 } /* cy_stop */
337
338 static void cy_start(struct tty_struct *tty)
339 {
340 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
341 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
342 int channel;
343 unsigned long flags;
344
345 #ifdef SERIAL_DEBUG_OTHER
346 printk("cy_start %s\n", tty->name); /* */
347 #endif
348
349 if (serial_paranoia_check(info, tty->name, "cy_start"))
350 return;
351
352 channel = info->line;
353
354 local_irq_save(flags);
355 base_addr[CyCAR] = (u_char) (channel);
356 base_addr[CyIER] |= CyTxMpty;
357 local_irq_restore(flags);
358 } /* cy_start */
359
360 /* The real interrupt service routines are called
361 whenever the card wants its hand held--chars
362 received, out buffer empty, modem change, etc.
363 */
364 static irqreturn_t cd2401_rxerr_interrupt(int irq, void *dev_id)
365 {
366 struct tty_struct *tty;
367 struct cyclades_port *info;
368 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
369 unsigned char err, rfoc;
370 int channel;
371 char data;
372
373 /* determine the channel and change to that context */
374 channel = (u_short) (base_addr[CyLICR] >> 2);
375 info = &cy_port[channel];
376 info->last_active = jiffies;
377
378 if ((err = base_addr[CyRISR]) & CyTIMEOUT) {
379 /* This is a receive timeout interrupt, ignore it */
380 base_addr[CyREOIR] = CyNOTRANS;
381 return IRQ_HANDLED;
382 }
383
384 /* Read a byte of data if there is any - assume the error
385 * is associated with this character */
386
387 if ((rfoc = base_addr[CyRFOC]) != 0)
388 data = base_addr[CyRDR];
389 else
390 data = 0;
391
392 /* if there is nowhere to put the data, discard it */
393 if (info->tty == 0) {
394 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
395 return IRQ_HANDLED;
396 } else { /* there is an open port for this data */
397 tty = info->tty;
398 if (err & info->ignore_status_mask) {
399 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
400 return IRQ_HANDLED;
401 }
402 if (tty_buffer_request_room(tty, 1) != 0) {
403 if (err & info->read_status_mask) {
404 if (err & CyBREAK) {
405 tty_insert_flip_char(tty, data,
406 TTY_BREAK);
407 if (info->flags & ASYNC_SAK) {
408 do_SAK(tty);
409 }
410 } else if (err & CyFRAME) {
411 tty_insert_flip_char(tty, data,
412 TTY_FRAME);
413 } else if (err & CyPARITY) {
414 tty_insert_flip_char(tty, data,
415 TTY_PARITY);
416 } else if (err & CyOVERRUN) {
417 tty_insert_flip_char(tty, 0,
418 TTY_OVERRUN);
419 /*
420 If the flip buffer itself is
421 overflowing, we still loose
422 the next incoming character.
423 */
424 if (tty_buffer_request_room(tty, 1) !=
425 0) {
426 tty_insert_flip_char(tty, data,
427 TTY_FRAME);
428 }
429 /* These two conditions may imply */
430 /* a normal read should be done. */
431 /* else if(data & CyTIMEOUT) */
432 /* else if(data & CySPECHAR) */
433 } else {
434 tty_insert_flip_char(tty, 0,
435 TTY_NORMAL);
436 }
437 } else {
438 tty_insert_flip_char(tty, data, TTY_NORMAL);
439 }
440 } else {
441 /* there was a software buffer overrun
442 and nothing could be done about it!!! */
443 }
444 }
445 tty_schedule_flip(tty);
446 /* end of service */
447 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
448 return IRQ_HANDLED;
449 } /* cy_rxerr_interrupt */
450
451 static irqreturn_t cd2401_modem_interrupt(int irq, void *dev_id)
452 {
453 struct cyclades_port *info;
454 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
455 int channel;
456 int mdm_change;
457 int mdm_status;
458
459 /* determine the channel and change to that context */
460 channel = (u_short) (base_addr[CyLICR] >> 2);
461 info = &cy_port[channel];
462 info->last_active = jiffies;
463
464 mdm_change = base_addr[CyMISR];
465 mdm_status = base_addr[CyMSVR1];
466
467 if (info->tty == 0) { /* nowhere to put the data, ignore it */
468 ;
469 } else {
470 if ((mdm_change & CyDCD)
471 && (info->flags & ASYNC_CHECK_CD)) {
472 if (mdm_status & CyDCD) {
473 /* CP('!'); */
474 wake_up_interruptible(&info->open_wait);
475 } else {
476 /* CP('@'); */
477 tty_hangup(info->tty);
478 wake_up_interruptible(&info->open_wait);
479 info->flags &= ~ASYNC_NORMAL_ACTIVE;
480 }
481 }
482 if ((mdm_change & CyCTS)
483 && (info->flags & ASYNC_CTS_FLOW)) {
484 if (info->tty->stopped) {
485 if (mdm_status & CyCTS) {
486 /* !!! cy_start isn't used because... */
487 info->tty->stopped = 0;
488 base_addr[CyIER] |= CyTxMpty;
489 tty_wakeup(info->tty);
490 }
491 } else {
492 if (!(mdm_status & CyCTS)) {
493 /* !!! cy_stop isn't used because... */
494 info->tty->stopped = 1;
495 base_addr[CyIER] &=
496 ~(CyTxMpty | CyTxRdy);
497 }
498 }
499 }
500 if (mdm_status & CyDSR) {
501 }
502 }
503 base_addr[CyMEOIR] = 0;
504 return IRQ_HANDLED;
505 } /* cy_modem_interrupt */
506
507 static irqreturn_t cd2401_tx_interrupt(int irq, void *dev_id)
508 {
509 struct cyclades_port *info;
510 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
511 int channel;
512 int char_count, saved_cnt;
513 int outch;
514
515 /* determine the channel and change to that context */
516 channel = (u_short) (base_addr[CyLICR] >> 2);
517
518 #ifdef CONFIG_REMOTE_DEBUG
519 if (channel == DEBUG_PORT) {
520 panic("TxInt on debug port!!!");
521 }
522 #endif
523
524 info = &cy_port[channel];
525
526 /* validate the port number (as configured and open) */
527 if ((channel < 0) || (NR_PORTS <= channel)) {
528 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
529 base_addr[CyTEOIR] = CyNOTRANS;
530 return IRQ_HANDLED;
531 }
532 info->last_active = jiffies;
533 if (info->tty == 0) {
534 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
535 base_addr[CyTEOIR] = CyNOTRANS;
536 return IRQ_HANDLED;
537 }
538
539 /* load the on-chip space available for outbound data */
540 saved_cnt = char_count = base_addr[CyTFTC];
541
542 if (info->x_char) { /* send special char */
543 outch = info->x_char;
544 base_addr[CyTDR] = outch;
545 char_count--;
546 info->x_char = 0;
547 }
548
549 if (info->x_break) {
550 /* The Cirrus chip requires the "Embedded Transmit
551 Commands" of start break, delay, and end break
552 sequences to be sent. The duration of the
553 break is given in TICs, which runs at HZ
554 (typically 100) and the PPR runs at 200 Hz,
555 so the delay is duration * 200/HZ, and thus a
556 break can run from 1/100 sec to about 5/4 sec.
557 Need to check these values - RGH 141095.
558 */
559 base_addr[CyTDR] = 0; /* start break */
560 base_addr[CyTDR] = 0x81;
561 base_addr[CyTDR] = 0; /* delay a bit */
562 base_addr[CyTDR] = 0x82;
563 base_addr[CyTDR] = info->x_break * 200 / HZ;
564 base_addr[CyTDR] = 0; /* terminate break */
565 base_addr[CyTDR] = 0x83;
566 char_count -= 7;
567 info->x_break = 0;
568 }
569
570 while (char_count > 0) {
571 if (!info->xmit_cnt) {
572 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
573 break;
574 }
575 if (info->xmit_buf == 0) {
576 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
577 break;
578 }
579 if (info->tty->stopped || info->tty->hw_stopped) {
580 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
581 break;
582 }
583 /* Because the Embedded Transmit Commands have been
584 enabled, we must check to see if the escape
585 character, NULL, is being sent. If it is, we
586 must ensure that there is room for it to be
587 doubled in the output stream. Therefore we
588 no longer advance the pointer when the character
589 is fetched, but rather wait until after the check
590 for a NULL output character. (This is necessary
591 because there may not be room for the two chars
592 needed to send a NULL.
593 */
594 outch = info->xmit_buf[info->xmit_tail];
595 if (outch) {
596 info->xmit_cnt--;
597 info->xmit_tail = (info->xmit_tail + 1)
598 & (PAGE_SIZE - 1);
599 base_addr[CyTDR] = outch;
600 char_count--;
601 } else {
602 if (char_count > 1) {
603 info->xmit_cnt--;
604 info->xmit_tail = (info->xmit_tail + 1)
605 & (PAGE_SIZE - 1);
606 base_addr[CyTDR] = outch;
607 base_addr[CyTDR] = 0;
608 char_count--;
609 char_count--;
610 } else {
611 break;
612 }
613 }
614 }
615
616 if (info->xmit_cnt < WAKEUP_CHARS)
617 tty_wakeup(info->tty);
618
619 base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS;
620 return IRQ_HANDLED;
621 } /* cy_tx_interrupt */
622
623 static irqreturn_t cd2401_rx_interrupt(int irq, void *dev_id)
624 {
625 struct tty_struct *tty;
626 struct cyclades_port *info;
627 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
628 int channel;
629 char data;
630 int char_count;
631 int save_cnt;
632 int len;
633
634 /* determine the channel and change to that context */
635 channel = (u_short) (base_addr[CyLICR] >> 2);
636 info = &cy_port[channel];
637 info->last_active = jiffies;
638 save_cnt = char_count = base_addr[CyRFOC];
639
640 #ifdef CONFIG_REMOTE_DEBUG
641 if (channel == DEBUG_PORT) {
642 while (char_count--) {
643 data = base_addr[CyRDR];
644 queueDebugChar(data);
645 }
646 } else
647 #endif
648 /* if there is nowhere to put the data, discard it */
649 if (info->tty == 0) {
650 while (char_count--) {
651 data = base_addr[CyRDR];
652 }
653 } else { /* there is an open port for this data */
654 tty = info->tty;
655 /* load # characters available from the chip */
656
657 #ifdef CYCLOM_ENABLE_MONITORING
658 ++info->mon.int_count;
659 info->mon.char_count += char_count;
660 if (char_count > info->mon.char_max)
661 info->mon.char_max = char_count;
662 info->mon.char_last = char_count;
663 #endif
664 len = tty_buffer_request_room(tty, char_count);
665 while (len--) {
666 data = base_addr[CyRDR];
667 tty_insert_flip_char(tty, data, TTY_NORMAL);
668 #ifdef CYCLOM_16Y_HACK
669 udelay(10L);
670 #endif
671 }
672 tty_schedule_flip(tty);
673 }
674 /* end of service */
675 base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS;
676 return IRQ_HANDLED;
677 } /* cy_rx_interrupt */
678
679 /* This is called whenever a port becomes active;
680 interrupts are enabled and DTR & RTS are turned on.
681 */
682 static int startup(struct cyclades_port *info)
683 {
684 unsigned long flags;
685 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
686 int channel;
687
688 if (info->flags & ASYNC_INITIALIZED) {
689 return 0;
690 }
691
692 if (!info->type) {
693 if (info->tty) {
694 set_bit(TTY_IO_ERROR, &info->tty->flags);
695 }
696 return 0;
697 }
698 if (!info->xmit_buf) {
699 info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
700 if (!info->xmit_buf) {
701 return -ENOMEM;
702 }
703 }
704
705 config_setup(info);
706
707 channel = info->line;
708
709 #ifdef SERIAL_DEBUG_OPEN
710 printk("startup channel %d\n", channel);
711 #endif
712
713 local_irq_save(flags);
714 base_addr[CyCAR] = (u_char) channel;
715 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
716
717 base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */
718 base_addr[CyMSVR1] = CyRTS;
719 /* CP('S');CP('1'); */
720 base_addr[CyMSVR2] = CyDTR;
721
722 #ifdef SERIAL_DEBUG_DTR
723 printk("cyc: %d: raising DTR\n", __LINE__);
724 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
725 base_addr[CyMSVR2]);
726 #endif
727
728 base_addr[CyIER] |= CyRxData;
729 info->flags |= ASYNC_INITIALIZED;
730
731 if (info->tty) {
732 clear_bit(TTY_IO_ERROR, &info->tty->flags);
733 }
734 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
735
736 local_irq_restore(flags);
737
738 #ifdef SERIAL_DEBUG_OPEN
739 printk(" done\n");
740 #endif
741 return 0;
742 } /* startup */
743
744 void start_xmit(struct cyclades_port *info)
745 {
746 unsigned long flags;
747 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
748 int channel;
749
750 channel = info->line;
751 local_irq_save(flags);
752 base_addr[CyCAR] = channel;
753 base_addr[CyIER] |= CyTxMpty;
754 local_irq_restore(flags);
755 } /* start_xmit */
756
757 /*
758 * This routine shuts down a serial port; interrupts are disabled,
759 * and DTR is dropped if the hangup on close termio flag is on.
760 */
761 static void shutdown(struct cyclades_port *info)
762 {
763 unsigned long flags;
764 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
765 int channel;
766
767 if (!(info->flags & ASYNC_INITIALIZED)) {
768 /* CP('$'); */
769 return;
770 }
771
772 channel = info->line;
773
774 #ifdef SERIAL_DEBUG_OPEN
775 printk("shutdown channel %d\n", channel);
776 #endif
777
778 /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE
779 SENT BEFORE DROPPING THE LINE !!! (Perhaps
780 set some flag that is read when XMTY happens.)
781 Other choices are to delay some fixed interval
782 or schedule some later processing.
783 */
784 local_irq_save(flags);
785 if (info->xmit_buf) {
786 free_page((unsigned long)info->xmit_buf);
787 info->xmit_buf = NULL;
788 }
789
790 base_addr[CyCAR] = (u_char) channel;
791 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
792 base_addr[CyMSVR1] = 0;
793 /* CP('C');CP('1'); */
794 base_addr[CyMSVR2] = 0;
795 #ifdef SERIAL_DEBUG_DTR
796 printk("cyc: %d: dropping DTR\n", __LINE__);
797 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
798 base_addr[CyMSVR2]);
799 #endif
800 }
801 write_cy_cmd(base_addr, CyDIS_RCVR);
802 /* it may be appropriate to clear _XMIT at
803 some later date (after testing)!!! */
804
805 if (info->tty) {
806 set_bit(TTY_IO_ERROR, &info->tty->flags);
807 }
808 info->flags &= ~ASYNC_INITIALIZED;
809 local_irq_restore(flags);
810
811 #ifdef SERIAL_DEBUG_OPEN
812 printk(" done\n");
813 #endif
814 } /* shutdown */
815
816 /*
817 * This routine finds or computes the various line characteristics.
818 */
819 static void config_setup(struct cyclades_port *info)
820 {
821 unsigned long flags;
822 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
823 int channel;
824 unsigned cflag;
825 int i;
826 unsigned char ti, need_init_chan = 0;
827
828 if (!info->tty || !info->tty->termios) {
829 return;
830 }
831 if (info->line == -1) {
832 return;
833 }
834 cflag = info->tty->termios->c_cflag;
835
836 /* baud rate */
837 i = cflag & CBAUD;
838 #ifdef CBAUDEX
839 /* Starting with kernel 1.1.65, there is direct support for
840 higher baud rates. The following code supports those
841 changes. The conditional aspect allows this driver to be
842 used for earlier as well as later kernel versions. (The
843 mapping is slightly different from serial.c because there
844 is still the possibility of supporting 75 kbit/sec with
845 the Cyclades board.)
846 */
847 if (i & CBAUDEX) {
848 if (i == B57600)
849 i = 16;
850 else if (i == B115200)
851 i = 18;
852 #ifdef B78600
853 else if (i == B78600)
854 i = 17;
855 #endif
856 else
857 info->tty->termios->c_cflag &= ~CBAUDEX;
858 }
859 #endif
860 if (i == 15) {
861 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
862 i += 1;
863 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
864 i += 3;
865 }
866 /* Don't ever change the speed of the console port. It will
867 * run at the speed specified in bootinfo, or at 19.2K */
868 /* Actually, it should run at whatever speed 166Bug was using */
869 /* Note info->timeout isn't used at present */
870 if (info != serial_console_info) {
871 info->tbpr = baud_bpr[i]; /* Tx BPR */
872 info->tco = baud_co[i]; /* Tx CO */
873 info->rbpr = baud_bpr[i]; /* Rx BPR */
874 info->rco = baud_co[i] >> 5; /* Rx CO */
875 if (baud_table[i] == 134) {
876 info->timeout =
877 (info->xmit_fifo_size * HZ * 30 / 269) + 2;
878 /* get it right for 134.5 baud */
879 } else if (baud_table[i]) {
880 info->timeout =
881 (info->xmit_fifo_size * HZ * 15 / baud_table[i]) +
882 2;
883 /* this needs to be propagated into the card info */
884 } else {
885 info->timeout = 0;
886 }
887 }
888 /* By tradition (is it a standard?) a baud rate of zero
889 implies the line should be/has been closed. A bit
890 later in this routine such a test is performed. */
891
892 /* byte size and parity */
893 info->cor7 = 0;
894 info->cor6 = 0;
895 info->cor5 = 0;
896 info->cor4 = (info->default_threshold ? info->default_threshold : baud_cor4[i]); /* receive threshold */
897 /* Following two lines added 101295, RGH. */
898 /* It is obviously wrong to access CyCORx, and not info->corx here,
899 * try and remember to fix it later! */
900 channel = info->line;
901 base_addr[CyCAR] = (u_char) channel;
902 if (C_CLOCAL(info->tty)) {
903 if (base_addr[CyIER] & CyMdmCh)
904 base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */
905 /* ignore 1->0 modem transitions */
906 if (base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD))
907 base_addr[CyCOR4] &= ~(CyDSR | CyCTS | CyDCD);
908 /* ignore 0->1 modem transitions */
909 if (base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD))
910 base_addr[CyCOR5] &= ~(CyDSR | CyCTS | CyDCD);
911 } else {
912 if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh)
913 base_addr[CyIER] |= CyMdmCh; /* with modem intr */
914 /* act on 1->0 modem transitions */
915 if ((base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD)) !=
916 (CyDSR | CyCTS | CyDCD))
917 base_addr[CyCOR4] |= CyDSR | CyCTS | CyDCD;
918 /* act on 0->1 modem transitions */
919 if ((base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD)) !=
920 (CyDSR | CyCTS | CyDCD))
921 base_addr[CyCOR5] |= CyDSR | CyCTS | CyDCD;
922 }
923 info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP;
924 info->cor2 = CyETC;
925 switch (cflag & CSIZE) {
926 case CS5:
927 info->cor1 = Cy_5_BITS;
928 break;
929 case CS6:
930 info->cor1 = Cy_6_BITS;
931 break;
932 case CS7:
933 info->cor1 = Cy_7_BITS;
934 break;
935 case CS8:
936 info->cor1 = Cy_8_BITS;
937 break;
938 }
939 if (cflag & PARENB) {
940 if (cflag & PARODD) {
941 info->cor1 |= CyPARITY_O;
942 } else {
943 info->cor1 |= CyPARITY_E;
944 }
945 } else {
946 info->cor1 |= CyPARITY_NONE;
947 }
948
949 /* CTS flow control flag */
950 #if 0
951 /* Don't complcate matters for now! RGH 141095 */
952 if (cflag & CRTSCTS) {
953 info->flags |= ASYNC_CTS_FLOW;
954 info->cor2 |= CyCtsAE;
955 } else {
956 info->flags &= ~ASYNC_CTS_FLOW;
957 info->cor2 &= ~CyCtsAE;
958 }
959 #endif
960 if (cflag & CLOCAL)
961 info->flags &= ~ASYNC_CHECK_CD;
962 else
963 info->flags |= ASYNC_CHECK_CD;
964
965 /***********************************************
966 The hardware option, CyRtsAO, presents RTS when
967 the chip has characters to send. Since most modems
968 use RTS as reverse (inbound) flow control, this
969 option is not used. If inbound flow control is
970 necessary, DTR can be programmed to provide the
971 appropriate signals for use with a non-standard
972 cable. Contact Marcio Saito for details.
973 ***********************************************/
974
975 channel = info->line;
976
977 local_irq_save(flags);
978 base_addr[CyCAR] = (u_char) channel;
979
980 /* CyCMR set once only in mvme167_init_serial() */
981 if (base_addr[CyLICR] != channel << 2)
982 base_addr[CyLICR] = channel << 2;
983 if (base_addr[CyLIVR] != 0x5c)
984 base_addr[CyLIVR] = 0x5c;
985
986 /* tx and rx baud rate */
987
988 if (base_addr[CyCOR1] != info->cor1)
989 need_init_chan = 1;
990 if (base_addr[CyTCOR] != info->tco)
991 base_addr[CyTCOR] = info->tco;
992 if (base_addr[CyTBPR] != info->tbpr)
993 base_addr[CyTBPR] = info->tbpr;
994 if (base_addr[CyRCOR] != info->rco)
995 base_addr[CyRCOR] = info->rco;
996 if (base_addr[CyRBPR] != info->rbpr)
997 base_addr[CyRBPR] = info->rbpr;
998
999 /* set line characteristics according configuration */
1000
1001 if (base_addr[CySCHR1] != START_CHAR(info->tty))
1002 base_addr[CySCHR1] = START_CHAR(info->tty);
1003 if (base_addr[CySCHR2] != STOP_CHAR(info->tty))
1004 base_addr[CySCHR2] = STOP_CHAR(info->tty);
1005 if (base_addr[CySCRL] != START_CHAR(info->tty))
1006 base_addr[CySCRL] = START_CHAR(info->tty);
1007 if (base_addr[CySCRH] != START_CHAR(info->tty))
1008 base_addr[CySCRH] = START_CHAR(info->tty);
1009 if (base_addr[CyCOR1] != info->cor1)
1010 base_addr[CyCOR1] = info->cor1;
1011 if (base_addr[CyCOR2] != info->cor2)
1012 base_addr[CyCOR2] = info->cor2;
1013 if (base_addr[CyCOR3] != info->cor3)
1014 base_addr[CyCOR3] = info->cor3;
1015 if (base_addr[CyCOR4] != info->cor4)
1016 base_addr[CyCOR4] = info->cor4;
1017 if (base_addr[CyCOR5] != info->cor5)
1018 base_addr[CyCOR5] = info->cor5;
1019 if (base_addr[CyCOR6] != info->cor6)
1020 base_addr[CyCOR6] = info->cor6;
1021 if (base_addr[CyCOR7] != info->cor7)
1022 base_addr[CyCOR7] = info->cor7;
1023
1024 if (need_init_chan)
1025 write_cy_cmd(base_addr, CyINIT_CHAN);
1026
1027 base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */
1028
1029 /* 2ms default rx timeout */
1030 ti = info->default_timeout ? info->default_timeout : 0x02;
1031 if (base_addr[CyRTPRL] != ti)
1032 base_addr[CyRTPRL] = ti;
1033 if (base_addr[CyRTPRH] != 0)
1034 base_addr[CyRTPRH] = 0;
1035
1036 /* Set up RTS here also ????? RGH 141095 */
1037 if (i == 0) { /* baud rate is zero, turn off line */
1038 if ((base_addr[CyMSVR2] & CyDTR) == CyDTR)
1039 base_addr[CyMSVR2] = 0;
1040 #ifdef SERIAL_DEBUG_DTR
1041 printk("cyc: %d: dropping DTR\n", __LINE__);
1042 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1043 base_addr[CyMSVR2]);
1044 #endif
1045 } else {
1046 if ((base_addr[CyMSVR2] & CyDTR) != CyDTR)
1047 base_addr[CyMSVR2] = CyDTR;
1048 #ifdef SERIAL_DEBUG_DTR
1049 printk("cyc: %d: raising DTR\n", __LINE__);
1050 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1051 base_addr[CyMSVR2]);
1052 #endif
1053 }
1054
1055 if (info->tty) {
1056 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1057 }
1058
1059 local_irq_restore(flags);
1060
1061 } /* config_setup */
1062
1063 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1064 {
1065 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1066 unsigned long flags;
1067
1068 #ifdef SERIAL_DEBUG_IO
1069 printk("cy_put_char %s(0x%02x)\n", tty->name, ch);
1070 #endif
1071
1072 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1073 return;
1074
1075 if (!info->xmit_buf)
1076 return;
1077
1078 local_irq_save(flags);
1079 if (info->xmit_cnt >= PAGE_SIZE - 1) {
1080 local_irq_restore(flags);
1081 return;
1082 }
1083
1084 info->xmit_buf[info->xmit_head++] = ch;
1085 info->xmit_head &= PAGE_SIZE - 1;
1086 info->xmit_cnt++;
1087 local_irq_restore(flags);
1088 } /* cy_put_char */
1089
1090 static void cy_flush_chars(struct tty_struct *tty)
1091 {
1092 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1093 unsigned long flags;
1094 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1095 int channel;
1096
1097 #ifdef SERIAL_DEBUG_IO
1098 printk("cy_flush_chars %s\n", tty->name); /* */
1099 #endif
1100
1101 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1102 return;
1103
1104 if (info->xmit_cnt <= 0 || tty->stopped
1105 || tty->hw_stopped || !info->xmit_buf)
1106 return;
1107
1108 channel = info->line;
1109
1110 local_irq_save(flags);
1111 base_addr[CyCAR] = channel;
1112 base_addr[CyIER] |= CyTxMpty;
1113 local_irq_restore(flags);
1114 } /* cy_flush_chars */
1115
1116 /* This routine gets called when tty_write has put something into
1117 the write_queue. If the port is not already transmitting stuff,
1118 start it off by enabling interrupts. The interrupt service
1119 routine will then ensure that the characters are sent. If the
1120 port is already active, there is no need to kick it.
1121 */
1122 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1123 {
1124 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1125 unsigned long flags;
1126 int c, total = 0;
1127
1128 #ifdef SERIAL_DEBUG_IO
1129 printk("cy_write %s\n", tty->name); /* */
1130 #endif
1131
1132 if (serial_paranoia_check(info, tty->name, "cy_write")) {
1133 return 0;
1134 }
1135
1136 if (!info->xmit_buf) {
1137 return 0;
1138 }
1139
1140 while (1) {
1141 local_irq_save(flags);
1142 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1143 SERIAL_XMIT_SIZE - info->xmit_head));
1144 if (c <= 0) {
1145 local_irq_restore(flags);
1146 break;
1147 }
1148
1149 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1150 info->xmit_head =
1151 (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1152 info->xmit_cnt += c;
1153 local_irq_restore(flags);
1154
1155 buf += c;
1156 count -= c;
1157 total += c;
1158 }
1159
1160 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
1161 start_xmit(info);
1162 }
1163 return total;
1164 } /* cy_write */
1165
1166 static int cy_write_room(struct tty_struct *tty)
1167 {
1168 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1169 int ret;
1170
1171 #ifdef SERIAL_DEBUG_IO
1172 printk("cy_write_room %s\n", tty->name); /* */
1173 #endif
1174
1175 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1176 return 0;
1177 ret = PAGE_SIZE - info->xmit_cnt - 1;
1178 if (ret < 0)
1179 ret = 0;
1180 return ret;
1181 } /* cy_write_room */
1182
1183 static int cy_chars_in_buffer(struct tty_struct *tty)
1184 {
1185 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1186
1187 #ifdef SERIAL_DEBUG_IO
1188 printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */
1189 #endif
1190
1191 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1192 return 0;
1193
1194 return info->xmit_cnt;
1195 } /* cy_chars_in_buffer */
1196
1197 static void cy_flush_buffer(struct tty_struct *tty)
1198 {
1199 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1200 unsigned long flags;
1201
1202 #ifdef SERIAL_DEBUG_IO
1203 printk("cy_flush_buffer %s\n", tty->name); /* */
1204 #endif
1205
1206 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1207 return;
1208 local_irq_save(flags);
1209 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1210 local_irq_restore(flags);
1211 tty_wakeup(tty);
1212 } /* cy_flush_buffer */
1213
1214 /* This routine is called by the upper-layer tty layer to signal
1215 that incoming characters should be throttled or that the
1216 throttle should be released.
1217 */
1218 static void cy_throttle(struct tty_struct *tty)
1219 {
1220 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1221 unsigned long flags;
1222 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1223 int channel;
1224
1225 #ifdef SERIAL_DEBUG_THROTTLE
1226 char buf[64];
1227
1228 printk("throttle %s: %d....\n", tty_name(tty, buf),
1229 tty->ldisc.chars_in_buffer(tty));
1230 printk("cy_throttle %s\n", tty->name);
1231 #endif
1232
1233 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1234 return;
1235 }
1236
1237 if (I_IXOFF(tty)) {
1238 info->x_char = STOP_CHAR(tty);
1239 /* Should use the "Send Special Character" feature!!! */
1240 }
1241
1242 channel = info->line;
1243
1244 local_irq_save(flags);
1245 base_addr[CyCAR] = (u_char) channel;
1246 base_addr[CyMSVR1] = 0;
1247 local_irq_restore(flags);
1248 } /* cy_throttle */
1249
1250 static void cy_unthrottle(struct tty_struct *tty)
1251 {
1252 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1253 unsigned long flags;
1254 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1255 int channel;
1256
1257 #ifdef SERIAL_DEBUG_THROTTLE
1258 char buf[64];
1259
1260 printk("throttle %s: %d....\n", tty_name(tty, buf),
1261 tty->ldisc.chars_in_buffer(tty));
1262 printk("cy_unthrottle %s\n", tty->name);
1263 #endif
1264
1265 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1266 return;
1267 }
1268
1269 if (I_IXOFF(tty)) {
1270 info->x_char = START_CHAR(tty);
1271 /* Should use the "Send Special Character" feature!!! */
1272 }
1273
1274 channel = info->line;
1275
1276 local_irq_save(flags);
1277 base_addr[CyCAR] = (u_char) channel;
1278 base_addr[CyMSVR1] = CyRTS;
1279 local_irq_restore(flags);
1280 } /* cy_unthrottle */
1281
1282 static int
1283 get_serial_info(struct cyclades_port *info,
1284 struct serial_struct __user * retinfo)
1285 {
1286 struct serial_struct tmp;
1287
1288 /* CP('g'); */
1289 if (!retinfo)
1290 return -EFAULT;
1291 memset(&tmp, 0, sizeof(tmp));
1292 tmp.type = info->type;
1293 tmp.line = info->line;
1294 tmp.port = info->line;
1295 tmp.irq = 0;
1296 tmp.flags = info->flags;
1297 tmp.baud_base = 0; /*!!! */
1298 tmp.close_delay = info->close_delay;
1299 tmp.custom_divisor = 0; /*!!! */
1300 tmp.hub6 = 0; /*!!! */
1301 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1302 } /* get_serial_info */
1303
1304 static int
1305 set_serial_info(struct cyclades_port *info,
1306 struct serial_struct __user * new_info)
1307 {
1308 struct serial_struct new_serial;
1309 struct cyclades_port old_info;
1310
1311 /* CP('s'); */
1312 if (!new_info)
1313 return -EFAULT;
1314 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1315 return -EFAULT;
1316 old_info = *info;
1317
1318 if (!capable(CAP_SYS_ADMIN)) {
1319 if ((new_serial.close_delay != info->close_delay) ||
1320 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
1321 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
1322 return -EPERM;
1323 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1324 (new_serial.flags & ASYNC_USR_MASK));
1325 goto check_and_exit;
1326 }
1327
1328 /*
1329 * OK, past this point, all the error checking has been done.
1330 * At this point, we start making changes.....
1331 */
1332
1333 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1334 (new_serial.flags & ASYNC_FLAGS));
1335 info->close_delay = new_serial.close_delay;
1336
1337 check_and_exit:
1338 if (info->flags & ASYNC_INITIALIZED) {
1339 config_setup(info);
1340 return 0;
1341 }
1342 return startup(info);
1343 } /* set_serial_info */
1344
1345 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1346 {
1347 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1348 int channel;
1349 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1350 unsigned long flags;
1351 unsigned char status;
1352
1353 channel = info->line;
1354
1355 local_irq_save(flags);
1356 base_addr[CyCAR] = (u_char) channel;
1357 status = base_addr[CyMSVR1] | base_addr[CyMSVR2];
1358 local_irq_restore(flags);
1359
1360 return ((status & CyRTS) ? TIOCM_RTS : 0)
1361 | ((status & CyDTR) ? TIOCM_DTR : 0)
1362 | ((status & CyDCD) ? TIOCM_CAR : 0)
1363 | ((status & CyDSR) ? TIOCM_DSR : 0)
1364 | ((status & CyCTS) ? TIOCM_CTS : 0);
1365 } /* cy_tiocmget */
1366
1367 static int
1368 cy_tiocmset(struct tty_struct *tty, struct file *file,
1369 unsigned int set, unsigned int clear)
1370 {
1371 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1372 int channel;
1373 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1374 unsigned long flags;
1375
1376 channel = info->line;
1377
1378 if (set & TIOCM_RTS) {
1379 local_irq_save(flags);
1380 base_addr[CyCAR] = (u_char) channel;
1381 base_addr[CyMSVR1] = CyRTS;
1382 local_irq_restore(flags);
1383 }
1384 if (set & TIOCM_DTR) {
1385 local_irq_save(flags);
1386 base_addr[CyCAR] = (u_char) channel;
1387 /* CP('S');CP('2'); */
1388 base_addr[CyMSVR2] = CyDTR;
1389 #ifdef SERIAL_DEBUG_DTR
1390 printk("cyc: %d: raising DTR\n", __LINE__);
1391 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1392 base_addr[CyMSVR2]);
1393 #endif
1394 local_irq_restore(flags);
1395 }
1396
1397 if (clear & TIOCM_RTS) {
1398 local_irq_save(flags);
1399 base_addr[CyCAR] = (u_char) channel;
1400 base_addr[CyMSVR1] = 0;
1401 local_irq_restore(flags);
1402 }
1403 if (clear & TIOCM_DTR) {
1404 local_irq_save(flags);
1405 base_addr[CyCAR] = (u_char) channel;
1406 /* CP('C');CP('2'); */
1407 base_addr[CyMSVR2] = 0;
1408 #ifdef SERIAL_DEBUG_DTR
1409 printk("cyc: %d: dropping DTR\n", __LINE__);
1410 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1411 base_addr[CyMSVR2]);
1412 #endif
1413 local_irq_restore(flags);
1414 }
1415
1416 return 0;
1417 } /* set_modem_info */
1418
1419 static void send_break(struct cyclades_port *info, int duration)
1420 { /* Let the transmit ISR take care of this (since it
1421 requires stuffing characters into the output stream).
1422 */
1423 info->x_break = duration;
1424 if (!info->xmit_cnt) {
1425 start_xmit(info);
1426 }
1427 } /* send_break */
1428
1429 static int
1430 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1431 {
1432
1433 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
1434 return -EFAULT;
1435 info->mon.int_count = 0;
1436 info->mon.char_count = 0;
1437 info->mon.char_max = 0;
1438 info->mon.char_last = 0;
1439 return 0;
1440 }
1441
1442 static int set_threshold(struct cyclades_port *info, unsigned long __user * arg)
1443 {
1444 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1445 unsigned long value;
1446 int channel;
1447
1448 if (get_user(value, arg))
1449 return -EFAULT;
1450
1451 channel = info->line;
1452 info->cor4 &= ~CyREC_FIFO;
1453 info->cor4 |= value & CyREC_FIFO;
1454 base_addr[CyCOR4] = info->cor4;
1455 return 0;
1456 }
1457
1458 static int
1459 get_threshold(struct cyclades_port *info, unsigned long __user * value)
1460 {
1461 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1462 int channel;
1463 unsigned long tmp;
1464
1465 channel = info->line;
1466
1467 tmp = base_addr[CyCOR4] & CyREC_FIFO;
1468 return put_user(tmp, value);
1469 }
1470
1471 static int
1472 set_default_threshold(struct cyclades_port *info, unsigned long __user * arg)
1473 {
1474 unsigned long value;
1475
1476 if (get_user(value, arg))
1477 return -EFAULT;
1478
1479 info->default_threshold = value & 0x0f;
1480 return 0;
1481 }
1482
1483 static int
1484 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1485 {
1486 return put_user(info->default_threshold, value);
1487 }
1488
1489 static int set_timeout(struct cyclades_port *info, unsigned long __user * arg)
1490 {
1491 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1492 int channel;
1493 unsigned long value;
1494
1495 if (get_user(value, arg))
1496 return -EFAULT;
1497
1498 channel = info->line;
1499
1500 base_addr[CyRTPRL] = value & 0xff;
1501 base_addr[CyRTPRH] = (value >> 8) & 0xff;
1502 return 0;
1503 }
1504
1505 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1506 {
1507 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1508 int channel;
1509 unsigned long tmp;
1510
1511 channel = info->line;
1512
1513 tmp = base_addr[CyRTPRL];
1514 return put_user(tmp, value);
1515 }
1516
1517 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1518 {
1519 info->default_timeout = value & 0xff;
1520 return 0;
1521 }
1522
1523 static int
1524 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1525 {
1526 return put_user(info->default_timeout, value);
1527 }
1528
1529 static int
1530 cy_ioctl(struct tty_struct *tty, struct file *file,
1531 unsigned int cmd, unsigned long arg)
1532 {
1533 unsigned long val;
1534 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1535 int ret_val = 0;
1536 void __user *argp = (void __user *)arg;
1537
1538 #ifdef SERIAL_DEBUG_OTHER
1539 printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */
1540 #endif
1541
1542 switch (cmd) {
1543 case CYGETMON:
1544 ret_val = get_mon_info(info, argp);
1545 break;
1546 case CYGETTHRESH:
1547 ret_val = get_threshold(info, argp);
1548 break;
1549 case CYSETTHRESH:
1550 ret_val = set_threshold(info, argp);
1551 break;
1552 case CYGETDEFTHRESH:
1553 ret_val = get_default_threshold(info, argp);
1554 break;
1555 case CYSETDEFTHRESH:
1556 ret_val = set_default_threshold(info, argp);
1557 break;
1558 case CYGETTIMEOUT:
1559 ret_val = get_timeout(info, argp);
1560 break;
1561 case CYSETTIMEOUT:
1562 ret_val = set_timeout(info, argp);
1563 break;
1564 case CYGETDEFTIMEOUT:
1565 ret_val = get_default_timeout(info, argp);
1566 break;
1567 case CYSETDEFTIMEOUT:
1568 ret_val = set_default_timeout(info, (unsigned long)arg);
1569 break;
1570 case TCSBRK: /* SVID version: non-zero arg --> no break */
1571 ret_val = tty_check_change(tty);
1572 if (ret_val)
1573 break;
1574 tty_wait_until_sent(tty, 0);
1575 if (!arg)
1576 send_break(info, HZ / 4); /* 1/4 second */
1577 break;
1578 case TCSBRKP: /* support for POSIX tcsendbreak() */
1579 ret_val = tty_check_change(tty);
1580 if (ret_val)
1581 break;
1582 tty_wait_until_sent(tty, 0);
1583 send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1584 break;
1585
1586 /* The following commands are incompletely implemented!!! */
1587 case TIOCGSOFTCAR:
1588 ret_val =
1589 put_user(C_CLOCAL(tty) ? 1 : 0,
1590 (unsigned long __user *)argp);
1591 break;
1592 case TIOCSSOFTCAR:
1593 ret_val = get_user(val, (unsigned long __user *)argp);
1594 if (ret_val)
1595 break;
1596 tty->termios->c_cflag =
1597 ((tty->termios->c_cflag & ~CLOCAL) | (val ? CLOCAL : 0));
1598 break;
1599 case TIOCGSERIAL:
1600 ret_val = get_serial_info(info, argp);
1601 break;
1602 case TIOCSSERIAL:
1603 ret_val = set_serial_info(info, argp);
1604 break;
1605 default:
1606 ret_val = -ENOIOCTLCMD;
1607 }
1608
1609 #ifdef SERIAL_DEBUG_OTHER
1610 printk("cy_ioctl done\n");
1611 #endif
1612
1613 return ret_val;
1614 } /* cy_ioctl */
1615
1616 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1617 {
1618 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1619
1620 #ifdef SERIAL_DEBUG_OTHER
1621 printk("cy_set_termios %s\n", tty->name);
1622 #endif
1623
1624 if (tty->termios->c_cflag == old_termios->c_cflag)
1625 return;
1626 config_setup(info);
1627
1628 if ((old_termios->c_cflag & CRTSCTS) &&
1629 !(tty->termios->c_cflag & CRTSCTS)) {
1630 tty->stopped = 0;
1631 cy_start(tty);
1632 }
1633 #ifdef tytso_patch_94Nov25_1726
1634 if (!(old_termios->c_cflag & CLOCAL) &&
1635 (tty->termios->c_cflag & CLOCAL))
1636 wake_up_interruptible(&info->open_wait);
1637 #endif
1638 } /* cy_set_termios */
1639
1640 static void cy_close(struct tty_struct *tty, struct file *filp)
1641 {
1642 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1643
1644 /* CP('C'); */
1645 #ifdef SERIAL_DEBUG_OTHER
1646 printk("cy_close %s\n", tty->name);
1647 #endif
1648
1649 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
1650 return;
1651 }
1652 #ifdef SERIAL_DEBUG_OPEN
1653 printk("cy_close %s, count = %d\n", tty->name, info->count);
1654 #endif
1655
1656 if ((tty->count == 1) && (info->count != 1)) {
1657 /*
1658 * Uh, oh. tty->count is 1, which means that the tty
1659 * structure will be freed. Info->count should always
1660 * be one in these conditions. If it's greater than
1661 * one, we've got real problems, since it means the
1662 * serial port won't be shutdown.
1663 */
1664 printk("cy_close: bad serial port count; tty->count is 1, "
1665 "info->count is %d\n", info->count);
1666 info->count = 1;
1667 }
1668 #ifdef SERIAL_DEBUG_COUNT
1669 printk("cyc: %d: decrementing count to %d\n", __LINE__,
1670 info->count - 1);
1671 #endif
1672 if (--info->count < 0) {
1673 printk("cy_close: bad serial port count for ttys%d: %d\n",
1674 info->line, info->count);
1675 #ifdef SERIAL_DEBUG_COUNT
1676 printk("cyc: %d: setting count to 0\n", __LINE__);
1677 #endif
1678 info->count = 0;
1679 }
1680 if (info->count)
1681 return;
1682 info->flags |= ASYNC_CLOSING;
1683 if (info->flags & ASYNC_INITIALIZED)
1684 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1685 shutdown(info);
1686 if (tty->driver->flush_buffer)
1687 tty->driver->flush_buffer(tty);
1688 tty_ldisc_flush(tty);
1689 info->tty = NULL;
1690 if (info->blocked_open) {
1691 if (info->close_delay) {
1692 msleep_interruptible(jiffies_to_msecs
1693 (info->close_delay));
1694 }
1695 wake_up_interruptible(&info->open_wait);
1696 }
1697 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1698 wake_up_interruptible(&info->close_wait);
1699
1700 #ifdef SERIAL_DEBUG_OTHER
1701 printk("cy_close done\n");
1702 #endif
1703 } /* cy_close */
1704
1705 /*
1706 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
1707 */
1708 void cy_hangup(struct tty_struct *tty)
1709 {
1710 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1711
1712 #ifdef SERIAL_DEBUG_OTHER
1713 printk("cy_hangup %s\n", tty->name); /* */
1714 #endif
1715
1716 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
1717 return;
1718
1719 shutdown(info);
1720 #if 0
1721 info->event = 0;
1722 info->count = 0;
1723 #ifdef SERIAL_DEBUG_COUNT
1724 printk("cyc: %d: setting count to 0\n", __LINE__);
1725 #endif
1726 info->tty = 0;
1727 #endif
1728 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1729 wake_up_interruptible(&info->open_wait);
1730 } /* cy_hangup */
1731
1732 /*
1733 * ------------------------------------------------------------
1734 * cy_open() and friends
1735 * ------------------------------------------------------------
1736 */
1737
1738 static int
1739 block_til_ready(struct tty_struct *tty, struct file *filp,
1740 struct cyclades_port *info)
1741 {
1742 DECLARE_WAITQUEUE(wait, current);
1743 unsigned long flags;
1744 int channel;
1745 int retval;
1746 volatile u_char *base_addr = (u_char *) BASE_ADDR;
1747
1748 /*
1749 * If the device is in the middle of being closed, then block
1750 * until it's done, and then try again.
1751 */
1752 if (info->flags & ASYNC_CLOSING) {
1753 interruptible_sleep_on(&info->close_wait);
1754 if (info->flags & ASYNC_HUP_NOTIFY) {
1755 return -EAGAIN;
1756 } else {
1757 return -ERESTARTSYS;
1758 }
1759 }
1760
1761 /*
1762 * If non-blocking mode is set, then make the check up front
1763 * and then exit.
1764 */
1765 if (filp->f_flags & O_NONBLOCK) {
1766 info->flags |= ASYNC_NORMAL_ACTIVE;
1767 return 0;
1768 }
1769
1770 /*
1771 * Block waiting for the carrier detect and the line to become
1772 * free (i.e., not in use by the callout). While we are in
1773 * this loop, info->count is dropped by one, so that
1774 * cy_close() knows when to free things. We restore it upon
1775 * exit, either normal or abnormal.
1776 */
1777 retval = 0;
1778 add_wait_queue(&info->open_wait, &wait);
1779 #ifdef SERIAL_DEBUG_OPEN
1780 printk("block_til_ready before block: %s, count = %d\n",
1781 tty->name, info->count);
1782 /**/
1783 #endif
1784 info->count--;
1785 #ifdef SERIAL_DEBUG_COUNT
1786 printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count);
1787 #endif
1788 info->blocked_open++;
1789
1790 channel = info->line;
1791
1792 while (1) {
1793 local_irq_save(flags);
1794 base_addr[CyCAR] = (u_char) channel;
1795 base_addr[CyMSVR1] = CyRTS;
1796 /* CP('S');CP('4'); */
1797 base_addr[CyMSVR2] = CyDTR;
1798 #ifdef SERIAL_DEBUG_DTR
1799 printk("cyc: %d: raising DTR\n", __LINE__);
1800 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1801 base_addr[CyMSVR2]);
1802 #endif
1803 local_irq_restore(flags);
1804 set_current_state(TASK_INTERRUPTIBLE);
1805 if (tty_hung_up_p(filp)
1806 || !(info->flags & ASYNC_INITIALIZED)) {
1807 if (info->flags & ASYNC_HUP_NOTIFY) {
1808 retval = -EAGAIN;
1809 } else {
1810 retval = -ERESTARTSYS;
1811 }
1812 break;
1813 }
1814 local_irq_save(flags);
1815 base_addr[CyCAR] = (u_char) channel;
1816 /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */
1817 if (!(info->flags & ASYNC_CLOSING)
1818 && (C_CLOCAL(tty)
1819 || (base_addr[CyMSVR1] & CyDCD))) {
1820 local_irq_restore(flags);
1821 break;
1822 }
1823 local_irq_restore(flags);
1824 if (signal_pending(current)) {
1825 retval = -ERESTARTSYS;
1826 break;
1827 }
1828 #ifdef SERIAL_DEBUG_OPEN
1829 printk("block_til_ready blocking: %s, count = %d\n",
1830 tty->name, info->count);
1831 /**/
1832 #endif
1833 schedule();
1834 }
1835 __set_current_state(TASK_RUNNING);
1836 remove_wait_queue(&info->open_wait, &wait);
1837 if (!tty_hung_up_p(filp)) {
1838 info->count++;
1839 #ifdef SERIAL_DEBUG_COUNT
1840 printk("cyc: %d: incrementing count to %d\n", __LINE__,
1841 info->count);
1842 #endif
1843 }
1844 info->blocked_open--;
1845 #ifdef SERIAL_DEBUG_OPEN
1846 printk("block_til_ready after blocking: %s, count = %d\n",
1847 tty->name, info->count);
1848 /**/
1849 #endif
1850 if (retval)
1851 return retval;
1852 info->flags |= ASYNC_NORMAL_ACTIVE;
1853 return 0;
1854 } /* block_til_ready */
1855
1856 /*
1857 * This routine is called whenever a serial port is opened. It
1858 * performs the serial-specific initialization for the tty structure.
1859 */
1860 int cy_open(struct tty_struct *tty, struct file *filp)
1861 {
1862 struct cyclades_port *info;
1863 int retval, line;
1864
1865 /* CP('O'); */
1866 line = tty->index;
1867 if ((line < 0) || (NR_PORTS <= line)) {
1868 return -ENODEV;
1869 }
1870 info = &cy_port[line];
1871 if (info->line < 0) {
1872 return -ENODEV;
1873 }
1874 #ifdef SERIAL_DEBUG_OTHER
1875 printk("cy_open %s\n", tty->name); /* */
1876 #endif
1877 if (serial_paranoia_check(info, tty->name, "cy_open")) {
1878 return -ENODEV;
1879 }
1880 #ifdef SERIAL_DEBUG_OPEN
1881 printk("cy_open %s, count = %d\n", tty->name, info->count);
1882 /**/
1883 #endif
1884 info->count++;
1885 #ifdef SERIAL_DEBUG_COUNT
1886 printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
1887 #endif
1888 tty->driver_data = info;
1889 info->tty = tty;
1890
1891 /*
1892 * Start up serial port
1893 */
1894 retval = startup(info);
1895 if (retval) {
1896 return retval;
1897 }
1898
1899 retval = block_til_ready(tty, filp, info);
1900 if (retval) {
1901 #ifdef SERIAL_DEBUG_OPEN
1902 printk("cy_open returning after block_til_ready with %d\n",
1903 retval);
1904 #endif
1905 return retval;
1906 }
1907 #ifdef SERIAL_DEBUG_OPEN
1908 printk("cy_open done\n");
1909 /**/
1910 #endif
1911 return 0;
1912 } /* cy_open */
1913
1914 /*
1915 * ---------------------------------------------------------------------
1916 * serial167_init() and friends
1917 *
1918 * serial167_init() is called at boot-time to initialize the serial driver.
1919 * ---------------------------------------------------------------------
1920 */
1921
1922 /*
1923 * This routine prints out the appropriate serial driver version
1924 * number, and identifies which options were configured into this
1925 * driver.
1926 */
1927 static void show_version(void)
1928 {
1929 printk("MVME166/167 cd2401 driver\n");
1930 } /* show_version */
1931
1932 /* initialize chips on card -- return number of valid
1933 chips (which is number of ports/4) */
1934
1935 /*
1936 * This initialises the hardware to a reasonable state. It should
1937 * probe the chip first so as to copy 166-Bug setup as a default for
1938 * port 0. It initialises CMR to CyASYNC; that is never done again, so
1939 * as to limit the number of CyINIT_CHAN commands in normal running.
1940 *
1941 * ... I wonder what I should do if this fails ...
1942 */
1943
1944 void mvme167_serial_console_setup(int cflag)
1945 {
1946 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1947 int ch;
1948 u_char spd;
1949 u_char rcor, rbpr, badspeed = 0;
1950 unsigned long flags;
1951
1952 local_irq_save(flags);
1953
1954 /*
1955 * First probe channel zero of the chip, to see what speed has
1956 * been selected.
1957 */
1958
1959 base_addr[CyCAR] = 0;
1960
1961 rcor = base_addr[CyRCOR] << 5;
1962 rbpr = base_addr[CyRBPR];
1963
1964 for (spd = 0; spd < sizeof(baud_bpr); spd++)
1965 if (rbpr == baud_bpr[spd] && rcor == baud_co[spd])
1966 break;
1967 if (spd >= sizeof(baud_bpr)) {
1968 spd = 14; /* 19200 */
1969 badspeed = 1; /* Failed to identify speed */
1970 }
1971 initial_console_speed = spd;
1972
1973 /* OK, we have chosen a speed, now reset and reinitialise */
1974
1975 my_udelay(20000L); /* Allow time for any active o/p to complete */
1976 if (base_addr[CyCCR] != 0x00) {
1977 local_irq_restore(flags);
1978 /* printk(" chip is never idle (CCR != 0)\n"); */
1979 return;
1980 }
1981
1982 base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */
1983 my_udelay(1000L);
1984
1985 if (base_addr[CyGFRCR] == 0x00) {
1986 local_irq_restore(flags);
1987 /* printk(" chip is not responding (GFRCR stayed 0)\n"); */
1988 return;
1989 }
1990
1991 /*
1992 * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms
1993 * tick
1994 */
1995
1996 base_addr[CyTPR] = 10;
1997
1998 base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */
1999 base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */
2000 base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */
2001
2002 /*
2003 * Attempt to set up all channels to something reasonable, and
2004 * bang out a INIT_CHAN command. We should then be able to limit
2005 * the ammount of fiddling we have to do in normal running.
2006 */
2007
2008 for (ch = 3; ch >= 0; ch--) {
2009 base_addr[CyCAR] = (u_char) ch;
2010 base_addr[CyIER] = 0;
2011 base_addr[CyCMR] = CyASYNC;
2012 base_addr[CyLICR] = (u_char) ch << 2;
2013 base_addr[CyLIVR] = 0x5c;
2014 base_addr[CyTCOR] = baud_co[spd];
2015 base_addr[CyTBPR] = baud_bpr[spd];
2016 base_addr[CyRCOR] = baud_co[spd] >> 5;
2017 base_addr[CyRBPR] = baud_bpr[spd];
2018 base_addr[CySCHR1] = 'Q' & 0x1f;
2019 base_addr[CySCHR2] = 'X' & 0x1f;
2020 base_addr[CySCRL] = 0;
2021 base_addr[CySCRH] = 0;
2022 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
2023 base_addr[CyCOR2] = 0;
2024 base_addr[CyCOR3] = Cy_1_STOP;
2025 base_addr[CyCOR4] = baud_cor4[spd];
2026 base_addr[CyCOR5] = 0;
2027 base_addr[CyCOR6] = 0;
2028 base_addr[CyCOR7] = 0;
2029 base_addr[CyRTPRL] = 2;
2030 base_addr[CyRTPRH] = 0;
2031 base_addr[CyMSVR1] = 0;
2032 base_addr[CyMSVR2] = 0;
2033 write_cy_cmd(base_addr, CyINIT_CHAN | CyDIS_RCVR | CyDIS_XMTR);
2034 }
2035
2036 /*
2037 * Now do specials for channel zero....
2038 */
2039
2040 base_addr[CyMSVR1] = CyRTS;
2041 base_addr[CyMSVR2] = CyDTR;
2042 base_addr[CyIER] = CyRxData;
2043 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
2044
2045 local_irq_restore(flags);
2046
2047 my_udelay(20000L); /* Let it all settle down */
2048
2049 printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]);
2050 if (badspeed)
2051 printk
2052 (" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n",
2053 rcor >> 5, rbpr);
2054 } /* serial_console_init */
2055
2056 static const struct tty_operations cy_ops = {
2057 .open = cy_open,
2058 .close = cy_close,
2059 .write = cy_write,
2060 .put_char = cy_put_char,
2061 .flush_chars = cy_flush_chars,
2062 .write_room = cy_write_room,
2063 .chars_in_buffer = cy_chars_in_buffer,
2064 .flush_buffer = cy_flush_buffer,
2065 .ioctl = cy_ioctl,
2066 .throttle = cy_throttle,
2067 .unthrottle = cy_unthrottle,
2068 .set_termios = cy_set_termios,
2069 .stop = cy_stop,
2070 .start = cy_start,
2071 .hangup = cy_hangup,
2072 .tiocmget = cy_tiocmget,
2073 .tiocmset = cy_tiocmset,
2074 };
2075
2076 /* The serial driver boot-time initialization code!
2077 Hardware I/O ports are mapped to character special devices on a
2078 first found, first allocated manner. That is, this code searches
2079 for Cyclom cards in the system. As each is found, it is probed
2080 to discover how many chips (and thus how many ports) are present.
2081 These ports are mapped to the tty ports 64 and upward in monotonic
2082 fashion. If an 8-port card is replaced with a 16-port card, the
2083 port mapping on a following card will shift.
2084
2085 This approach is different from what is used in the other serial
2086 device driver because the Cyclom is more properly a multiplexer,
2087 not just an aggregation of serial ports on one card.
2088
2089 If there are more cards with more ports than have been statically
2090 allocated above, a warning is printed and the extra ports are ignored.
2091 */
2092 static int __init serial167_init(void)
2093 {
2094 struct cyclades_port *info;
2095 int ret = 0;
2096 int good_ports = 0;
2097 int port_num = 0;
2098 int index;
2099 int DefSpeed;
2100 #ifdef notyet
2101 struct sigaction sa;
2102 #endif
2103
2104 if (!(mvme16x_config & MVME16x_CONFIG_GOT_CD2401))
2105 return 0;
2106
2107 cy_serial_driver = alloc_tty_driver(NR_PORTS);
2108 if (!cy_serial_driver)
2109 return -ENOMEM;
2110
2111 #if 0
2112 scrn[1] = '\0';
2113 #endif
2114
2115 show_version();
2116
2117 /* Has "console=0,9600n8" been used in bootinfo to change speed? */
2118 if (serial_console_cflag)
2119 DefSpeed = serial_console_cflag & 0017;
2120 else {
2121 DefSpeed = initial_console_speed;
2122 serial_console_info = &cy_port[0];
2123 serial_console_cflag = DefSpeed | CS8;
2124 #if 0
2125 serial_console = 64; /*callout_driver.minor_start */
2126 #endif
2127 }
2128
2129 /* Initialize the tty_driver structure */
2130
2131 cy_serial_driver->owner = THIS_MODULE;
2132 cy_serial_driver->name = "ttyS";
2133 cy_serial_driver->major = TTY_MAJOR;
2134 cy_serial_driver->minor_start = 64;
2135 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2136 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
2137 cy_serial_driver->init_termios = tty_std_termios;
2138 cy_serial_driver->init_termios.c_cflag =
2139 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2140 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
2141 tty_set_operations(cy_serial_driver, &cy_ops);
2142
2143 ret = tty_register_driver(cy_serial_driver);
2144 if (ret) {
2145 printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n");
2146 put_tty_driver(cy_serial_driver);
2147 return ret;
2148 }
2149
2150 port_num = 0;
2151 info = cy_port;
2152 for (index = 0; index < 1; index++) {
2153
2154 good_ports = 4;
2155
2156 if (port_num < NR_PORTS) {
2157 while (good_ports-- && port_num < NR_PORTS) {
2158 /*** initialize port ***/
2159 info->magic = CYCLADES_MAGIC;
2160 info->type = PORT_CIRRUS;
2161 info->card = index;
2162 info->line = port_num;
2163 info->flags = STD_COM_FLAGS;
2164 info->tty = NULL;
2165 info->xmit_fifo_size = 12;
2166 info->cor1 = CyPARITY_NONE | Cy_8_BITS;
2167 info->cor2 = CyETC;
2168 info->cor3 = Cy_1_STOP;
2169 info->cor4 = 0x08; /* _very_ small receive threshold */
2170 info->cor5 = 0;
2171 info->cor6 = 0;
2172 info->cor7 = 0;
2173 info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */
2174 info->tco = baud_co[DefSpeed]; /* Tx CO */
2175 info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */
2176 info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */
2177 info->close_delay = 0;
2178 info->x_char = 0;
2179 info->count = 0;
2180 #ifdef SERIAL_DEBUG_COUNT
2181 printk("cyc: %d: setting count to 0\n",
2182 __LINE__);
2183 #endif
2184 info->blocked_open = 0;
2185 info->default_threshold = 0;
2186 info->default_timeout = 0;
2187 init_waitqueue_head(&info->open_wait);
2188 init_waitqueue_head(&info->close_wait);
2189 /* info->session */
2190 /* info->pgrp */
2191 /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/
2192 info->read_status_mask =
2193 CyTIMEOUT | CySPECHAR | CyBREAK | CyPARITY |
2194 CyFRAME | CyOVERRUN;
2195 /* info->timeout */
2196
2197 printk("ttyS%d ", info->line);
2198 port_num++;
2199 info++;
2200 if (!(port_num & 7)) {
2201 printk("\n ");
2202 }
2203 }
2204 }
2205 printk("\n");
2206 }
2207 while (port_num < NR_PORTS) {
2208 info->line = -1;
2209 port_num++;
2210 info++;
2211 }
2212 #ifdef CONFIG_REMOTE_DEBUG
2213 debug_setup();
2214 #endif
2215 ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
2216 "cd2401_errors", cd2401_rxerr_interrupt);
2217 if (ret) {
2218 printk(KERN_ERR "Could't get cd2401_errors IRQ");
2219 goto cleanup_serial_driver;
2220 }
2221
2222 ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
2223 "cd2401_modem", cd2401_modem_interrupt);
2224 if (ret) {
2225 printk(KERN_ERR "Could't get cd2401_modem IRQ");
2226 goto cleanup_irq_cd2401_errors;
2227 }
2228
2229 ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
2230 "cd2401_txints", cd2401_tx_interrupt);
2231 if (ret) {
2232 printk(KERN_ERR "Could't get cd2401_txints IRQ");
2233 goto cleanup_irq_cd2401_modem;
2234 }
2235
2236 ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
2237 "cd2401_rxints", cd2401_rx_interrupt);
2238 if (ret) {
2239 printk(KERN_ERR "Could't get cd2401_rxints IRQ");
2240 goto cleanup_irq_cd2401_txints;
2241 }
2242
2243 /* Now we have registered the interrupt handlers, allow the interrupts */
2244
2245 pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */
2246 pcc2chip[PccSCCTICR] = 0x15;
2247 pcc2chip[PccSCCRICR] = 0x15;
2248
2249 pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */
2250
2251 return 0;
2252 cleanup_irq_cd2401_txints:
2253 free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt);
2254 cleanup_irq_cd2401_modem:
2255 free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt);
2256 cleanup_irq_cd2401_errors:
2257 free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt);
2258 cleanup_serial_driver:
2259 if (tty_unregister_driver(cy_serial_driver))
2260 printk(KERN_ERR
2261 "Couldn't unregister MVME166/7 serial driver\n");
2262 put_tty_driver(cy_serial_driver);
2263 return ret;
2264 } /* serial167_init */
2265
2266 module_init(serial167_init);
2267
2268 #ifdef CYCLOM_SHOW_STATUS
2269 static void show_status(int line_num)
2270 {
2271 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2272 int channel;
2273 struct cyclades_port *info;
2274 unsigned long flags;
2275
2276 info = &cy_port[line_num];
2277 channel = info->line;
2278 printk(" channel %d\n", channel);
2279 /**/ printk(" cy_port\n");
2280 printk(" card line flags = %d %d %x\n",
2281 info->card, info->line, info->flags);
2282 printk
2283 (" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n",
2284 (long)info->tty, info->read_status_mask, info->timeout,
2285 info->xmit_fifo_size);
2286 printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n",
2287 info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
2288 info->cor6, info->cor7);
2289 printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", info->tbpr, info->tco,
2290 info->rbpr, info->rco);
2291 printk(" close_delay event count = %d %d %d\n", info->close_delay,
2292 info->event, info->count);
2293 printk(" x_char blocked_open = %x %x\n", info->x_char,
2294 info->blocked_open);
2295 printk(" open_wait = %lx %lx %lx\n", (long)info->open_wait);
2296
2297 local_irq_save(flags);
2298
2299 /* Global Registers */
2300
2301 printk(" CyGFRCR %x\n", base_addr[CyGFRCR]);
2302 printk(" CyCAR %x\n", base_addr[CyCAR]);
2303 printk(" CyRISR %x\n", base_addr[CyRISR]);
2304 printk(" CyTISR %x\n", base_addr[CyTISR]);
2305 printk(" CyMISR %x\n", base_addr[CyMISR]);
2306 printk(" CyRIR %x\n", base_addr[CyRIR]);
2307 printk(" CyTIR %x\n", base_addr[CyTIR]);
2308 printk(" CyMIR %x\n", base_addr[CyMIR]);
2309 printk(" CyTPR %x\n", base_addr[CyTPR]);
2310
2311 base_addr[CyCAR] = (u_char) channel;
2312
2313 /* Virtual Registers */
2314
2315 #if 0
2316 printk(" CyRIVR %x\n", base_addr[CyRIVR]);
2317 printk(" CyTIVR %x\n", base_addr[CyTIVR]);
2318 printk(" CyMIVR %x\n", base_addr[CyMIVR]);
2319 printk(" CyMISR %x\n", base_addr[CyMISR]);
2320 #endif
2321
2322 /* Channel Registers */
2323
2324 printk(" CyCCR %x\n", base_addr[CyCCR]);
2325 printk(" CyIER %x\n", base_addr[CyIER]);
2326 printk(" CyCOR1 %x\n", base_addr[CyCOR1]);
2327 printk(" CyCOR2 %x\n", base_addr[CyCOR2]);
2328 printk(" CyCOR3 %x\n", base_addr[CyCOR3]);
2329 printk(" CyCOR4 %x\n", base_addr[CyCOR4]);
2330 printk(" CyCOR5 %x\n", base_addr[CyCOR5]);
2331 #if 0
2332 printk(" CyCCSR %x\n", base_addr[CyCCSR]);
2333 printk(" CyRDCR %x\n", base_addr[CyRDCR]);
2334 #endif
2335 printk(" CySCHR1 %x\n", base_addr[CySCHR1]);
2336 printk(" CySCHR2 %x\n", base_addr[CySCHR2]);
2337 #if 0
2338 printk(" CySCHR3 %x\n", base_addr[CySCHR3]);
2339 printk(" CySCHR4 %x\n", base_addr[CySCHR4]);
2340 printk(" CySCRL %x\n", base_addr[CySCRL]);
2341 printk(" CySCRH %x\n", base_addr[CySCRH]);
2342 printk(" CyLNC %x\n", base_addr[CyLNC]);
2343 printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]);
2344 printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]);
2345 #endif
2346 printk(" CyRTPRL %x\n", base_addr[CyRTPRL]);
2347 printk(" CyRTPRH %x\n", base_addr[CyRTPRH]);
2348 printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]);
2349 printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]);
2350 printk(" CyRBPR %x\n", base_addr[CyRBPR]);
2351 printk(" CyRCOR %x\n", base_addr[CyRCOR]);
2352 printk(" CyTBPR %x\n", base_addr[CyTBPR]);
2353 printk(" CyTCOR %x\n", base_addr[CyTCOR]);
2354
2355 local_irq_restore(flags);
2356 } /* show_status */
2357 #endif
2358
2359 #if 0
2360 /* Dummy routine in mvme16x/config.c for now */
2361
2362 /* Serial console setup. Called from linux/init/main.c */
2363
2364 void console_setup(char *str, int *ints)
2365 {
2366 char *s;
2367 int baud, bits, parity;
2368 int cflag = 0;
2369
2370 /* Sanity check. */
2371 if (ints[0] > 3 || ints[1] > 3)
2372 return;
2373
2374 /* Get baud, bits and parity */
2375 baud = 2400;
2376 bits = 8;
2377 parity = 'n';
2378 if (ints[2])
2379 baud = ints[2];
2380 if ((s = strchr(str, ','))) {
2381 do {
2382 s++;
2383 } while (*s >= '0' && *s <= '9');
2384 if (*s)
2385 parity = *s++;
2386 if (*s)
2387 bits = *s - '0';
2388 }
2389
2390 /* Now construct a cflag setting. */
2391 switch (baud) {
2392 case 1200:
2393 cflag |= B1200;
2394 break;
2395 case 9600:
2396 cflag |= B9600;
2397 break;
2398 case 19200:
2399 cflag |= B19200;
2400 break;
2401 case 38400:
2402 cflag |= B38400;
2403 break;
2404 case 2400:
2405 default:
2406 cflag |= B2400;
2407 break;
2408 }
2409 switch (bits) {
2410 case 7:
2411 cflag |= CS7;
2412 break;
2413 default:
2414 case 8:
2415 cflag |= CS8;
2416 break;
2417 }
2418 switch (parity) {
2419 case 'o':
2420 case 'O':
2421 cflag |= PARODD;
2422 break;
2423 case 'e':
2424 case 'E':
2425 cflag |= PARENB;
2426 break;
2427 }
2428
2429 serial_console_info = &cy_port[ints[1]];
2430 serial_console_cflag = cflag;
2431 serial_console = ints[1] + 64; /*callout_driver.minor_start */
2432 }
2433 #endif
2434
2435 /*
2436 * The following is probably out of date for 2.1.x serial console stuff.
2437 *
2438 * The console is registered early on from arch/m68k/kernel/setup.c, and
2439 * it therefore relies on the chip being setup correctly by 166-Bug. This
2440 * seems reasonable, as the serial port has been used to invoke the system
2441 * boot. It also means that this function must not rely on any data
2442 * initialisation performed by serial167_init() etc.
2443 *
2444 * Of course, once the console has been registered, we had better ensure
2445 * that serial167_init() doesn't leave the chip non-functional.
2446 *
2447 * The console must be locked when we get here.
2448 */
2449
2450 void serial167_console_write(struct console *co, const char *str,
2451 unsigned count)
2452 {
2453 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2454 unsigned long flags;
2455 volatile u_char sink;
2456 u_char ier;
2457 int port;
2458 u_char do_lf = 0;
2459 int i = 0;
2460
2461 local_irq_save(flags);
2462
2463 /* Ensure transmitter is enabled! */
2464
2465 port = 0;
2466 base_addr[CyCAR] = (u_char) port;
2467 while (base_addr[CyCCR])
2468 ;
2469 base_addr[CyCCR] = CyENB_XMTR;
2470
2471 ier = base_addr[CyIER];
2472 base_addr[CyIER] = CyTxMpty;
2473
2474 while (1) {
2475 if (pcc2chip[PccSCCTICR] & 0x20) {
2476 /* We have a Tx int. Acknowledge it */
2477 sink = pcc2chip[PccTPIACKR];
2478 if ((base_addr[CyLICR] >> 2) == port) {
2479 if (i == count) {
2480 /* Last char of string is now output */
2481 base_addr[CyTEOIR] = CyNOTRANS;
2482 break;
2483 }
2484 if (do_lf) {
2485 base_addr[CyTDR] = '\n';
2486 str++;
2487 i++;
2488 do_lf = 0;
2489 } else if (*str == '\n') {
2490 base_addr[CyTDR] = '\r';
2491 do_lf = 1;
2492 } else {
2493 base_addr[CyTDR] = *str++;
2494 i++;
2495 }
2496 base_addr[CyTEOIR] = 0;
2497 } else
2498 base_addr[CyTEOIR] = CyNOTRANS;
2499 }
2500 }
2501
2502 base_addr[CyIER] = ier;
2503
2504 local_irq_restore(flags);
2505 }
2506
2507 static struct tty_driver *serial167_console_device(struct console *c,
2508 int *index)
2509 {
2510 *index = c->index;
2511 return cy_serial_driver;
2512 }
2513
2514 static struct console sercons = {
2515 .name = "ttyS",
2516 .write = serial167_console_write,
2517 .device = serial167_console_device,
2518 .flags = CON_PRINTBUFFER,
2519 .index = -1,
2520 };
2521
2522 static int __init serial167_console_init(void)
2523 {
2524 if (vme_brdtype == VME_TYPE_MVME166 ||
2525 vme_brdtype == VME_TYPE_MVME167 ||
2526 vme_brdtype == VME_TYPE_MVME177) {
2527 mvme167_serial_console_setup(0);
2528 register_console(&sercons);
2529 }
2530 return 0;
2531 }
2532
2533 console_initcall(serial167_console_init);
2534
2535 #ifdef CONFIG_REMOTE_DEBUG
2536 void putDebugChar(int c)
2537 {
2538 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2539 unsigned long flags;
2540 volatile u_char sink;
2541 u_char ier;
2542 int port;
2543
2544 local_irq_save(flags);
2545
2546 /* Ensure transmitter is enabled! */
2547
2548 port = DEBUG_PORT;
2549 base_addr[CyCAR] = (u_char) port;
2550 while (base_addr[CyCCR])
2551 ;
2552 base_addr[CyCCR] = CyENB_XMTR;
2553
2554 ier = base_addr[CyIER];
2555 base_addr[CyIER] = CyTxMpty;
2556
2557 while (1) {
2558 if (pcc2chip[PccSCCTICR] & 0x20) {
2559 /* We have a Tx int. Acknowledge it */
2560 sink = pcc2chip[PccTPIACKR];
2561 if ((base_addr[CyLICR] >> 2) == port) {
2562 base_addr[CyTDR] = c;
2563 base_addr[CyTEOIR] = 0;
2564 break;
2565 } else
2566 base_addr[CyTEOIR] = CyNOTRANS;
2567 }
2568 }
2569
2570 base_addr[CyIER] = ier;
2571
2572 local_irq_restore(flags);
2573 }
2574
2575 int getDebugChar()
2576 {
2577 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2578 unsigned long flags;
2579 volatile u_char sink;
2580 u_char ier;
2581 int port;
2582 int i, c;
2583
2584 i = debugiq.out;
2585 if (i != debugiq.in) {
2586 c = debugiq.buf[i];
2587 if (++i == DEBUG_LEN)
2588 i = 0;
2589 debugiq.out = i;
2590 return c;
2591 }
2592 /* OK, nothing in queue, wait in poll loop */
2593
2594 local_irq_save(flags);
2595
2596 /* Ensure receiver is enabled! */
2597
2598 port = DEBUG_PORT;
2599 base_addr[CyCAR] = (u_char) port;
2600 #if 0
2601 while (base_addr[CyCCR])
2602 ;
2603 base_addr[CyCCR] = CyENB_RCVR;
2604 #endif
2605 ier = base_addr[CyIER];
2606 base_addr[CyIER] = CyRxData;
2607
2608 while (1) {
2609 if (pcc2chip[PccSCCRICR] & 0x20) {
2610 /* We have a Rx int. Acknowledge it */
2611 sink = pcc2chip[PccRPIACKR];
2612 if ((base_addr[CyLICR] >> 2) == port) {
2613 int cnt = base_addr[CyRFOC];
2614 while (cnt-- > 0) {
2615 c = base_addr[CyRDR];
2616 if (c == 0)
2617 printk
2618 ("!! debug char is null (cnt=%d) !!",
2619 cnt);
2620 else
2621 queueDebugChar(c);
2622 }
2623 base_addr[CyREOIR] = 0;
2624 i = debugiq.out;
2625 if (i == debugiq.in)
2626 panic("Debug input queue empty!");
2627 c = debugiq.buf[i];
2628 if (++i == DEBUG_LEN)
2629 i = 0;
2630 debugiq.out = i;
2631 break;
2632 } else
2633 base_addr[CyREOIR] = CyNOTRANS;
2634 }
2635 }
2636
2637 base_addr[CyIER] = ier;
2638
2639 local_irq_restore(flags);
2640
2641 return (c);
2642 }
2643
2644 void queueDebugChar(int c)
2645 {
2646 int i;
2647
2648 i = debugiq.in;
2649 debugiq.buf[i] = c;
2650 if (++i == DEBUG_LEN)
2651 i = 0;
2652 if (i != debugiq.out)
2653 debugiq.in = i;
2654 }
2655
2656 static void debug_setup()
2657 {
2658 unsigned long flags;
2659 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2660 int i, cflag;
2661
2662 cflag = B19200;
2663
2664 local_irq_save(flags);
2665
2666 for (i = 0; i < 4; i++) {
2667 base_addr[CyCAR] = i;
2668 base_addr[CyLICR] = i << 2;
2669 }
2670
2671 debugiq.in = debugiq.out = 0;
2672
2673 base_addr[CyCAR] = DEBUG_PORT;
2674
2675 /* baud rate */
2676 i = cflag & CBAUD;
2677
2678 base_addr[CyIER] = 0;
2679
2680 base_addr[CyCMR] = CyASYNC;
2681 base_addr[CyLICR] = DEBUG_PORT << 2;
2682 base_addr[CyLIVR] = 0x5c;
2683
2684 /* tx and rx baud rate */
2685
2686 base_addr[CyTCOR] = baud_co[i];
2687 base_addr[CyTBPR] = baud_bpr[i];
2688 base_addr[CyRCOR] = baud_co[i] >> 5;
2689 base_addr[CyRBPR] = baud_bpr[i];
2690
2691 /* set line characteristics according configuration */
2692
2693 base_addr[CySCHR1] = 0;
2694 base_addr[CySCHR2] = 0;
2695 base_addr[CySCRL] = 0;
2696 base_addr[CySCRH] = 0;
2697 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
2698 base_addr[CyCOR2] = 0;
2699 base_addr[CyCOR3] = Cy_1_STOP;
2700 base_addr[CyCOR4] = baud_cor4[i];
2701 base_addr[CyCOR5] = 0;
2702 base_addr[CyCOR6] = 0;
2703 base_addr[CyCOR7] = 0;
2704
2705 write_cy_cmd(base_addr, CyINIT_CHAN);
2706 write_cy_cmd(base_addr, CyENB_RCVR);
2707
2708 base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */
2709
2710 base_addr[CyRTPRL] = 2;
2711 base_addr[CyRTPRH] = 0;
2712
2713 base_addr[CyMSVR1] = CyRTS;
2714 base_addr[CyMSVR2] = CyDTR;
2715
2716 base_addr[CyIER] = CyRxData;
2717
2718 local_irq_restore(flags);
2719
2720 } /* debug_setup */
2721
2722 #endif
2723
2724 MODULE_LICENSE("GPL");
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