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PRCM: 34XX: Fix wrong shift value used in dpll4_m4x2_ck enable bit
[linux-ginger.git] / drivers / char / serial167.c
blob3b23270eaa65385f56a2cef7652aeb2ccea77055
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 int 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 0;
1074
1075 if (!info->xmit_buf)
1076 return 0;
1077
1078 local_irq_save(flags);
1079 if (info->xmit_cnt >= PAGE_SIZE - 1) {
1080 local_irq_restore(flags);
1081 return 0;
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 return 1;
1089 } /* cy_put_char */
1090
1091 static void cy_flush_chars(struct tty_struct *tty)
1092 {
1093 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1094 unsigned long flags;
1095 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1096 int channel;
1097
1098 #ifdef SERIAL_DEBUG_IO
1099 printk("cy_flush_chars %s\n", tty->name); /* */
1100 #endif
1101
1102 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1103 return;
1104
1105 if (info->xmit_cnt <= 0 || tty->stopped
1106 || tty->hw_stopped || !info->xmit_buf)
1107 return;
1108
1109 channel = info->line;
1110
1111 local_irq_save(flags);
1112 base_addr[CyCAR] = channel;
1113 base_addr[CyIER] |= CyTxMpty;
1114 local_irq_restore(flags);
1115 } /* cy_flush_chars */
1116
1117 /* This routine gets called when tty_write has put something into
1118 the write_queue. If the port is not already transmitting stuff,
1119 start it off by enabling interrupts. The interrupt service
1120 routine will then ensure that the characters are sent. If the
1121 port is already active, there is no need to kick it.
1122 */
1123 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1124 {
1125 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1126 unsigned long flags;
1127 int c, total = 0;
1128
1129 #ifdef SERIAL_DEBUG_IO
1130 printk("cy_write %s\n", tty->name); /* */
1131 #endif
1132
1133 if (serial_paranoia_check(info, tty->name, "cy_write")) {
1134 return 0;
1135 }
1136
1137 if (!info->xmit_buf) {
1138 return 0;
1139 }
1140
1141 while (1) {
1142 local_irq_save(flags);
1143 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1144 SERIAL_XMIT_SIZE - info->xmit_head));
1145 if (c <= 0) {
1146 local_irq_restore(flags);
1147 break;
1148 }
1149
1150 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1151 info->xmit_head =
1152 (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1153 info->xmit_cnt += c;
1154 local_irq_restore(flags);
1155
1156 buf += c;
1157 count -= c;
1158 total += c;
1159 }
1160
1161 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
1162 start_xmit(info);
1163 }
1164 return total;
1165 } /* cy_write */
1166
1167 static int cy_write_room(struct tty_struct *tty)
1168 {
1169 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1170 int ret;
1171
1172 #ifdef SERIAL_DEBUG_IO
1173 printk("cy_write_room %s\n", tty->name); /* */
1174 #endif
1175
1176 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1177 return 0;
1178 ret = PAGE_SIZE - info->xmit_cnt - 1;
1179 if (ret < 0)
1180 ret = 0;
1181 return ret;
1182 } /* cy_write_room */
1183
1184 static int cy_chars_in_buffer(struct tty_struct *tty)
1185 {
1186 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1187
1188 #ifdef SERIAL_DEBUG_IO
1189 printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */
1190 #endif
1191
1192 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1193 return 0;
1194
1195 return info->xmit_cnt;
1196 } /* cy_chars_in_buffer */
1197
1198 static void cy_flush_buffer(struct tty_struct *tty)
1199 {
1200 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1201 unsigned long flags;
1202
1203 #ifdef SERIAL_DEBUG_IO
1204 printk("cy_flush_buffer %s\n", tty->name); /* */
1205 #endif
1206
1207 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1208 return;
1209 local_irq_save(flags);
1210 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1211 local_irq_restore(flags);
1212 tty_wakeup(tty);
1213 } /* cy_flush_buffer */
1214
1215 /* This routine is called by the upper-layer tty layer to signal
1216 that incoming characters should be throttled or that the
1217 throttle should be released.
1218 */
1219 static void cy_throttle(struct tty_struct *tty)
1220 {
1221 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1222 unsigned long flags;
1223 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1224 int channel;
1225
1226 #ifdef SERIAL_DEBUG_THROTTLE
1227 char buf[64];
1228
1229 printk("throttle %s: %d....\n", tty_name(tty, buf),
1230 tty->ldisc.chars_in_buffer(tty));
1231 printk("cy_throttle %s\n", tty->name);
1232 #endif
1233
1234 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1235 return;
1236 }
1237
1238 if (I_IXOFF(tty)) {
1239 info->x_char = STOP_CHAR(tty);
1240 /* Should use the "Send Special Character" feature!!! */
1241 }
1242
1243 channel = info->line;
1244
1245 local_irq_save(flags);
1246 base_addr[CyCAR] = (u_char) channel;
1247 base_addr[CyMSVR1] = 0;
1248 local_irq_restore(flags);
1249 } /* cy_throttle */
1250
1251 static void cy_unthrottle(struct tty_struct *tty)
1252 {
1253 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1254 unsigned long flags;
1255 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1256 int channel;
1257
1258 #ifdef SERIAL_DEBUG_THROTTLE
1259 char buf[64];
1260
1261 printk("throttle %s: %d....\n", tty_name(tty, buf),
1262 tty->ldisc.chars_in_buffer(tty));
1263 printk("cy_unthrottle %s\n", tty->name);
1264 #endif
1265
1266 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1267 return;
1268 }
1269
1270 if (I_IXOFF(tty)) {
1271 info->x_char = START_CHAR(tty);
1272 /* Should use the "Send Special Character" feature!!! */
1273 }
1274
1275 channel = info->line;
1276
1277 local_irq_save(flags);
1278 base_addr[CyCAR] = (u_char) channel;
1279 base_addr[CyMSVR1] = CyRTS;
1280 local_irq_restore(flags);
1281 } /* cy_unthrottle */
1282
1283 static int
1284 get_serial_info(struct cyclades_port *info,
1285 struct serial_struct __user * retinfo)
1286 {
1287 struct serial_struct tmp;
1288
1289 /* CP('g'); */
1290 if (!retinfo)
1291 return -EFAULT;
1292 memset(&tmp, 0, sizeof(tmp));
1293 tmp.type = info->type;
1294 tmp.line = info->line;
1295 tmp.port = info->line;
1296 tmp.irq = 0;
1297 tmp.flags = info->flags;
1298 tmp.baud_base = 0; /*!!! */
1299 tmp.close_delay = info->close_delay;
1300 tmp.custom_divisor = 0; /*!!! */
1301 tmp.hub6 = 0; /*!!! */
1302 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1303 } /* get_serial_info */
1304
1305 static int
1306 set_serial_info(struct cyclades_port *info,
1307 struct serial_struct __user * new_info)
1308 {
1309 struct serial_struct new_serial;
1310 struct cyclades_port old_info;
1311
1312 /* CP('s'); */
1313 if (!new_info)
1314 return -EFAULT;
1315 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1316 return -EFAULT;
1317 old_info = *info;
1318
1319 if (!capable(CAP_SYS_ADMIN)) {
1320 if ((new_serial.close_delay != info->close_delay) ||
1321 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
1322 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
1323 return -EPERM;
1324 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1325 (new_serial.flags & ASYNC_USR_MASK));
1326 goto check_and_exit;
1327 }
1328
1329 /*
1330 * OK, past this point, all the error checking has been done.
1331 * At this point, we start making changes.....
1332 */
1333
1334 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1335 (new_serial.flags & ASYNC_FLAGS));
1336 info->close_delay = new_serial.close_delay;
1337
1338 check_and_exit:
1339 if (info->flags & ASYNC_INITIALIZED) {
1340 config_setup(info);
1341 return 0;
1342 }
1343 return startup(info);
1344 } /* set_serial_info */
1345
1346 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1347 {
1348 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1349 int channel;
1350 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1351 unsigned long flags;
1352 unsigned char status;
1353
1354 channel = info->line;
1355
1356 local_irq_save(flags);
1357 base_addr[CyCAR] = (u_char) channel;
1358 status = base_addr[CyMSVR1] | base_addr[CyMSVR2];
1359 local_irq_restore(flags);
1360
1361 return ((status & CyRTS) ? TIOCM_RTS : 0)
1362 | ((status & CyDTR) ? TIOCM_DTR : 0)
1363 | ((status & CyDCD) ? TIOCM_CAR : 0)
1364 | ((status & CyDSR) ? TIOCM_DSR : 0)
1365 | ((status & CyCTS) ? TIOCM_CTS : 0);
1366 } /* cy_tiocmget */
1367
1368 static int
1369 cy_tiocmset(struct tty_struct *tty, struct file *file,
1370 unsigned int set, unsigned int clear)
1371 {
1372 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1373 int channel;
1374 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1375 unsigned long flags;
1376
1377 channel = info->line;
1378
1379 if (set & TIOCM_RTS) {
1380 local_irq_save(flags);
1381 base_addr[CyCAR] = (u_char) channel;
1382 base_addr[CyMSVR1] = CyRTS;
1383 local_irq_restore(flags);
1384 }
1385 if (set & TIOCM_DTR) {
1386 local_irq_save(flags);
1387 base_addr[CyCAR] = (u_char) channel;
1388 /* CP('S');CP('2'); */
1389 base_addr[CyMSVR2] = CyDTR;
1390 #ifdef SERIAL_DEBUG_DTR
1391 printk("cyc: %d: raising DTR\n", __LINE__);
1392 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1393 base_addr[CyMSVR2]);
1394 #endif
1395 local_irq_restore(flags);
1396 }
1397
1398 if (clear & TIOCM_RTS) {
1399 local_irq_save(flags);
1400 base_addr[CyCAR] = (u_char) channel;
1401 base_addr[CyMSVR1] = 0;
1402 local_irq_restore(flags);
1403 }
1404 if (clear & TIOCM_DTR) {
1405 local_irq_save(flags);
1406 base_addr[CyCAR] = (u_char) channel;
1407 /* CP('C');CP('2'); */
1408 base_addr[CyMSVR2] = 0;
1409 #ifdef SERIAL_DEBUG_DTR
1410 printk("cyc: %d: dropping DTR\n", __LINE__);
1411 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1412 base_addr[CyMSVR2]);
1413 #endif
1414 local_irq_restore(flags);
1415 }
1416
1417 return 0;
1418 } /* set_modem_info */
1419
1420 static void send_break(struct cyclades_port *info, int duration)
1421 { /* Let the transmit ISR take care of this (since it
1422 requires stuffing characters into the output stream).
1423 */
1424 info->x_break = duration;
1425 if (!info->xmit_cnt) {
1426 start_xmit(info);
1427 }
1428 } /* send_break */
1429
1430 static int
1431 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1432 {
1433
1434 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
1435 return -EFAULT;
1436 info->mon.int_count = 0;
1437 info->mon.char_count = 0;
1438 info->mon.char_max = 0;
1439 info->mon.char_last = 0;
1440 return 0;
1441 }
1442
1443 static int set_threshold(struct cyclades_port *info, unsigned long __user * arg)
1444 {
1445 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1446 unsigned long value;
1447 int channel;
1448
1449 if (get_user(value, arg))
1450 return -EFAULT;
1451
1452 channel = info->line;
1453 info->cor4 &= ~CyREC_FIFO;
1454 info->cor4 |= value & CyREC_FIFO;
1455 base_addr[CyCOR4] = info->cor4;
1456 return 0;
1457 }
1458
1459 static int
1460 get_threshold(struct cyclades_port *info, unsigned long __user * value)
1461 {
1462 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1463 int channel;
1464 unsigned long tmp;
1465
1466 channel = info->line;
1467
1468 tmp = base_addr[CyCOR4] & CyREC_FIFO;
1469 return put_user(tmp, value);
1470 }
1471
1472 static int
1473 set_default_threshold(struct cyclades_port *info, unsigned long __user * arg)
1474 {
1475 unsigned long value;
1476
1477 if (get_user(value, arg))
1478 return -EFAULT;
1479
1480 info->default_threshold = value & 0x0f;
1481 return 0;
1482 }
1483
1484 static int
1485 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1486 {
1487 return put_user(info->default_threshold, value);
1488 }
1489
1490 static int set_timeout(struct cyclades_port *info, unsigned long __user * arg)
1491 {
1492 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1493 int channel;
1494 unsigned long value;
1495
1496 if (get_user(value, arg))
1497 return -EFAULT;
1498
1499 channel = info->line;
1500
1501 base_addr[CyRTPRL] = value & 0xff;
1502 base_addr[CyRTPRH] = (value >> 8) & 0xff;
1503 return 0;
1504 }
1505
1506 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1507 {
1508 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1509 int channel;
1510 unsigned long tmp;
1511
1512 channel = info->line;
1513
1514 tmp = base_addr[CyRTPRL];
1515 return put_user(tmp, value);
1516 }
1517
1518 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1519 {
1520 info->default_timeout = value & 0xff;
1521 return 0;
1522 }
1523
1524 static int
1525 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1526 {
1527 return put_user(info->default_timeout, value);
1528 }
1529
1530 static int
1531 cy_ioctl(struct tty_struct *tty, struct file *file,
1532 unsigned int cmd, unsigned long arg)
1533 {
1534 unsigned long val;
1535 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1536 int ret_val = 0;
1537 void __user *argp = (void __user *)arg;
1538
1539 #ifdef SERIAL_DEBUG_OTHER
1540 printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */
1541 #endif
1542
1543 lock_kernel();
1544
1545 switch (cmd) {
1546 case CYGETMON:
1547 ret_val = get_mon_info(info, argp);
1548 break;
1549 case CYGETTHRESH:
1550 ret_val = get_threshold(info, argp);
1551 break;
1552 case CYSETTHRESH:
1553 ret_val = set_threshold(info, argp);
1554 break;
1555 case CYGETDEFTHRESH:
1556 ret_val = get_default_threshold(info, argp);
1557 break;
1558 case CYSETDEFTHRESH:
1559 ret_val = set_default_threshold(info, argp);
1560 break;
1561 case CYGETTIMEOUT:
1562 ret_val = get_timeout(info, argp);
1563 break;
1564 case CYSETTIMEOUT:
1565 ret_val = set_timeout(info, argp);
1566 break;
1567 case CYGETDEFTIMEOUT:
1568 ret_val = get_default_timeout(info, argp);
1569 break;
1570 case CYSETDEFTIMEOUT:
1571 ret_val = set_default_timeout(info, (unsigned long)arg);
1572 break;
1573 case TCSBRK: /* SVID version: non-zero arg --> no break */
1574 ret_val = tty_check_change(tty);
1575 if (ret_val)
1576 break;
1577 tty_wait_until_sent(tty, 0);
1578 if (!arg)
1579 send_break(info, HZ / 4); /* 1/4 second */
1580 break;
1581 case TCSBRKP: /* support for POSIX tcsendbreak() */
1582 ret_val = tty_check_change(tty);
1583 if (ret_val)
1584 break;
1585 tty_wait_until_sent(tty, 0);
1586 send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1587 break;
1588
1589 /* The following commands are incompletely implemented!!! */
1590 case TIOCGSERIAL:
1591 ret_val = get_serial_info(info, argp);
1592 break;
1593 case TIOCSSERIAL:
1594 ret_val = set_serial_info(info, argp);
1595 break;
1596 default:
1597 ret_val = -ENOIOCTLCMD;
1598 }
1599 unlock_kernel();
1600
1601 #ifdef SERIAL_DEBUG_OTHER
1602 printk("cy_ioctl done\n");
1603 #endif
1604
1605 return ret_val;
1606 } /* cy_ioctl */
1607
1608 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1609 {
1610 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1611
1612 #ifdef SERIAL_DEBUG_OTHER
1613 printk("cy_set_termios %s\n", tty->name);
1614 #endif
1615
1616 if (tty->termios->c_cflag == old_termios->c_cflag)
1617 return;
1618 config_setup(info);
1619
1620 if ((old_termios->c_cflag & CRTSCTS) &&
1621 !(tty->termios->c_cflag & CRTSCTS)) {
1622 tty->stopped = 0;
1623 cy_start(tty);
1624 }
1625 #ifdef tytso_patch_94Nov25_1726
1626 if (!(old_termios->c_cflag & CLOCAL) &&
1627 (tty->termios->c_cflag & CLOCAL))
1628 wake_up_interruptible(&info->open_wait);
1629 #endif
1630 } /* cy_set_termios */
1631
1632 static void cy_close(struct tty_struct *tty, struct file *filp)
1633 {
1634 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1635
1636 /* CP('C'); */
1637 #ifdef SERIAL_DEBUG_OTHER
1638 printk("cy_close %s\n", tty->name);
1639 #endif
1640
1641 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
1642 return;
1643 }
1644 #ifdef SERIAL_DEBUG_OPEN
1645 printk("cy_close %s, count = %d\n", tty->name, info->count);
1646 #endif
1647
1648 if ((tty->count == 1) && (info->count != 1)) {
1649 /*
1650 * Uh, oh. tty->count is 1, which means that the tty
1651 * structure will be freed. Info->count should always
1652 * be one in these conditions. If it's greater than
1653 * one, we've got real problems, since it means the
1654 * serial port won't be shutdown.
1655 */
1656 printk("cy_close: bad serial port count; tty->count is 1, "
1657 "info->count is %d\n", info->count);
1658 info->count = 1;
1659 }
1660 #ifdef SERIAL_DEBUG_COUNT
1661 printk("cyc: %d: decrementing count to %d\n", __LINE__,
1662 info->count - 1);
1663 #endif
1664 if (--info->count < 0) {
1665 printk("cy_close: bad serial port count for ttys%d: %d\n",
1666 info->line, info->count);
1667 #ifdef SERIAL_DEBUG_COUNT
1668 printk("cyc: %d: setting count to 0\n", __LINE__);
1669 #endif
1670 info->count = 0;
1671 }
1672 if (info->count)
1673 return;
1674 info->flags |= ASYNC_CLOSING;
1675 if (info->flags & ASYNC_INITIALIZED)
1676 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1677 shutdown(info);
1678 cy_flush_buffer(tty);
1679 tty_ldisc_flush(tty);
1680 info->tty = NULL;
1681 if (info->blocked_open) {
1682 if (info->close_delay) {
1683 msleep_interruptible(jiffies_to_msecs
1684 (info->close_delay));
1685 }
1686 wake_up_interruptible(&info->open_wait);
1687 }
1688 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1689 wake_up_interruptible(&info->close_wait);
1690
1691 #ifdef SERIAL_DEBUG_OTHER
1692 printk("cy_close done\n");
1693 #endif
1694 } /* cy_close */
1695
1696 /*
1697 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
1698 */
1699 void cy_hangup(struct tty_struct *tty)
1700 {
1701 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1702
1703 #ifdef SERIAL_DEBUG_OTHER
1704 printk("cy_hangup %s\n", tty->name); /* */
1705 #endif
1706
1707 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
1708 return;
1709
1710 shutdown(info);
1711 #if 0
1712 info->event = 0;
1713 info->count = 0;
1714 #ifdef SERIAL_DEBUG_COUNT
1715 printk("cyc: %d: setting count to 0\n", __LINE__);
1716 #endif
1717 info->tty = 0;
1718 #endif
1719 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1720 wake_up_interruptible(&info->open_wait);
1721 } /* cy_hangup */
1722
1723 /*
1724 * ------------------------------------------------------------
1725 * cy_open() and friends
1726 * ------------------------------------------------------------
1727 */
1728
1729 static int
1730 block_til_ready(struct tty_struct *tty, struct file *filp,
1731 struct cyclades_port *info)
1732 {
1733 DECLARE_WAITQUEUE(wait, current);
1734 unsigned long flags;
1735 int channel;
1736 int retval;
1737 volatile u_char *base_addr = (u_char *) BASE_ADDR;
1738
1739 /*
1740 * If the device is in the middle of being closed, then block
1741 * until it's done, and then try again.
1742 */
1743 if (info->flags & ASYNC_CLOSING) {
1744 interruptible_sleep_on(&info->close_wait);
1745 if (info->flags & ASYNC_HUP_NOTIFY) {
1746 return -EAGAIN;
1747 } else {
1748 return -ERESTARTSYS;
1749 }
1750 }
1751
1752 /*
1753 * If non-blocking mode is set, then make the check up front
1754 * and then exit.
1755 */
1756 if (filp->f_flags & O_NONBLOCK) {
1757 info->flags |= ASYNC_NORMAL_ACTIVE;
1758 return 0;
1759 }
1760
1761 /*
1762 * Block waiting for the carrier detect and the line to become
1763 * free (i.e., not in use by the callout). While we are in
1764 * this loop, info->count is dropped by one, so that
1765 * cy_close() knows when to free things. We restore it upon
1766 * exit, either normal or abnormal.
1767 */
1768 retval = 0;
1769 add_wait_queue(&info->open_wait, &wait);
1770 #ifdef SERIAL_DEBUG_OPEN
1771 printk("block_til_ready before block: %s, count = %d\n",
1772 tty->name, info->count);
1773 /**/
1774 #endif
1775 info->count--;
1776 #ifdef SERIAL_DEBUG_COUNT
1777 printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count);
1778 #endif
1779 info->blocked_open++;
1780
1781 channel = info->line;
1782
1783 while (1) {
1784 local_irq_save(flags);
1785 base_addr[CyCAR] = (u_char) channel;
1786 base_addr[CyMSVR1] = CyRTS;
1787 /* CP('S');CP('4'); */
1788 base_addr[CyMSVR2] = CyDTR;
1789 #ifdef SERIAL_DEBUG_DTR
1790 printk("cyc: %d: raising DTR\n", __LINE__);
1791 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1792 base_addr[CyMSVR2]);
1793 #endif
1794 local_irq_restore(flags);
1795 set_current_state(TASK_INTERRUPTIBLE);
1796 if (tty_hung_up_p(filp)
1797 || !(info->flags & ASYNC_INITIALIZED)) {
1798 if (info->flags & ASYNC_HUP_NOTIFY) {
1799 retval = -EAGAIN;
1800 } else {
1801 retval = -ERESTARTSYS;
1802 }
1803 break;
1804 }
1805 local_irq_save(flags);
1806 base_addr[CyCAR] = (u_char) channel;
1807 /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */
1808 if (!(info->flags & ASYNC_CLOSING)
1809 && (C_CLOCAL(tty)
1810 || (base_addr[CyMSVR1] & CyDCD))) {
1811 local_irq_restore(flags);
1812 break;
1813 }
1814 local_irq_restore(flags);
1815 if (signal_pending(current)) {
1816 retval = -ERESTARTSYS;
1817 break;
1818 }
1819 #ifdef SERIAL_DEBUG_OPEN
1820 printk("block_til_ready blocking: %s, count = %d\n",
1821 tty->name, info->count);
1822 /**/
1823 #endif
1824 schedule();
1825 }
1826 __set_current_state(TASK_RUNNING);
1827 remove_wait_queue(&info->open_wait, &wait);
1828 if (!tty_hung_up_p(filp)) {
1829 info->count++;
1830 #ifdef SERIAL_DEBUG_COUNT
1831 printk("cyc: %d: incrementing count to %d\n", __LINE__,
1832 info->count);
1833 #endif
1834 }
1835 info->blocked_open--;
1836 #ifdef SERIAL_DEBUG_OPEN
1837 printk("block_til_ready after blocking: %s, count = %d\n",
1838 tty->name, info->count);
1839 /**/
1840 #endif
1841 if (retval)
1842 return retval;
1843 info->flags |= ASYNC_NORMAL_ACTIVE;
1844 return 0;
1845 } /* block_til_ready */
1846
1847 /*
1848 * This routine is called whenever a serial port is opened. It
1849 * performs the serial-specific initialization for the tty structure.
1850 */
1851 int cy_open(struct tty_struct *tty, struct file *filp)
1852 {
1853 struct cyclades_port *info;
1854 int retval, line;
1855
1856 /* CP('O'); */
1857 line = tty->index;
1858 if ((line < 0) || (NR_PORTS <= line)) {
1859 return -ENODEV;
1860 }
1861 info = &cy_port[line];
1862 if (info->line < 0) {
1863 return -ENODEV;
1864 }
1865 #ifdef SERIAL_DEBUG_OTHER
1866 printk("cy_open %s\n", tty->name); /* */
1867 #endif
1868 if (serial_paranoia_check(info, tty->name, "cy_open")) {
1869 return -ENODEV;
1870 }
1871 #ifdef SERIAL_DEBUG_OPEN
1872 printk("cy_open %s, count = %d\n", tty->name, info->count);
1873 /**/
1874 #endif
1875 info->count++;
1876 #ifdef SERIAL_DEBUG_COUNT
1877 printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
1878 #endif
1879 tty->driver_data = info;
1880 info->tty = tty;
1881
1882 /*
1883 * Start up serial port
1884 */
1885 retval = startup(info);
1886 if (retval) {
1887 return retval;
1888 }
1889
1890 retval = block_til_ready(tty, filp, info);
1891 if (retval) {
1892 #ifdef SERIAL_DEBUG_OPEN
1893 printk("cy_open returning after block_til_ready with %d\n",
1894 retval);
1895 #endif
1896 return retval;
1897 }
1898 #ifdef SERIAL_DEBUG_OPEN
1899 printk("cy_open done\n");
1900 /**/
1901 #endif
1902 return 0;
1903 } /* cy_open */
1904
1905 /*
1906 * ---------------------------------------------------------------------
1907 * serial167_init() and friends
1908 *
1909 * serial167_init() is called at boot-time to initialize the serial driver.
1910 * ---------------------------------------------------------------------
1911 */
1912
1913 /*
1914 * This routine prints out the appropriate serial driver version
1915 * number, and identifies which options were configured into this
1916 * driver.
1917 */
1918 static void show_version(void)
1919 {
1920 printk("MVME166/167 cd2401 driver\n");
1921 } /* show_version */
1922
1923 /* initialize chips on card -- return number of valid
1924 chips (which is number of ports/4) */
1925
1926 /*
1927 * This initialises the hardware to a reasonable state. It should
1928 * probe the chip first so as to copy 166-Bug setup as a default for
1929 * port 0. It initialises CMR to CyASYNC; that is never done again, so
1930 * as to limit the number of CyINIT_CHAN commands in normal running.
1931 *
1932 * ... I wonder what I should do if this fails ...
1933 */
1934
1935 void mvme167_serial_console_setup(int cflag)
1936 {
1937 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1938 int ch;
1939 u_char spd;
1940 u_char rcor, rbpr, badspeed = 0;
1941 unsigned long flags;
1942
1943 local_irq_save(flags);
1944
1945 /*
1946 * First probe channel zero of the chip, to see what speed has
1947 * been selected.
1948 */
1949
1950 base_addr[CyCAR] = 0;
1951
1952 rcor = base_addr[CyRCOR] << 5;
1953 rbpr = base_addr[CyRBPR];
1954
1955 for (spd = 0; spd < sizeof(baud_bpr); spd++)
1956 if (rbpr == baud_bpr[spd] && rcor == baud_co[spd])
1957 break;
1958 if (spd >= sizeof(baud_bpr)) {
1959 spd = 14; /* 19200 */
1960 badspeed = 1; /* Failed to identify speed */
1961 }
1962 initial_console_speed = spd;
1963
1964 /* OK, we have chosen a speed, now reset and reinitialise */
1965
1966 my_udelay(20000L); /* Allow time for any active o/p to complete */
1967 if (base_addr[CyCCR] != 0x00) {
1968 local_irq_restore(flags);
1969 /* printk(" chip is never idle (CCR != 0)\n"); */
1970 return;
1971 }
1972
1973 base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */
1974 my_udelay(1000L);
1975
1976 if (base_addr[CyGFRCR] == 0x00) {
1977 local_irq_restore(flags);
1978 /* printk(" chip is not responding (GFRCR stayed 0)\n"); */
1979 return;
1980 }
1981
1982 /*
1983 * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms
1984 * tick
1985 */
1986
1987 base_addr[CyTPR] = 10;
1988
1989 base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */
1990 base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */
1991 base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */
1992
1993 /*
1994 * Attempt to set up all channels to something reasonable, and
1995 * bang out a INIT_CHAN command. We should then be able to limit
1996 * the ammount of fiddling we have to do in normal running.
1997 */
1998
1999 for (ch = 3; ch >= 0; ch--) {
2000 base_addr[CyCAR] = (u_char) ch;
2001 base_addr[CyIER] = 0;
2002 base_addr[CyCMR] = CyASYNC;
2003 base_addr[CyLICR] = (u_char) ch << 2;
2004 base_addr[CyLIVR] = 0x5c;
2005 base_addr[CyTCOR] = baud_co[spd];
2006 base_addr[CyTBPR] = baud_bpr[spd];
2007 base_addr[CyRCOR] = baud_co[spd] >> 5;
2008 base_addr[CyRBPR] = baud_bpr[spd];
2009 base_addr[CySCHR1] = 'Q' & 0x1f;
2010 base_addr[CySCHR2] = 'X' & 0x1f;
2011 base_addr[CySCRL] = 0;
2012 base_addr[CySCRH] = 0;
2013 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
2014 base_addr[CyCOR2] = 0;
2015 base_addr[CyCOR3] = Cy_1_STOP;
2016 base_addr[CyCOR4] = baud_cor4[spd];
2017 base_addr[CyCOR5] = 0;
2018 base_addr[CyCOR6] = 0;
2019 base_addr[CyCOR7] = 0;
2020 base_addr[CyRTPRL] = 2;
2021 base_addr[CyRTPRH] = 0;
2022 base_addr[CyMSVR1] = 0;
2023 base_addr[CyMSVR2] = 0;
2024 write_cy_cmd(base_addr, CyINIT_CHAN | CyDIS_RCVR | CyDIS_XMTR);
2025 }
2026
2027 /*
2028 * Now do specials for channel zero....
2029 */
2030
2031 base_addr[CyMSVR1] = CyRTS;
2032 base_addr[CyMSVR2] = CyDTR;
2033 base_addr[CyIER] = CyRxData;
2034 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
2035
2036 local_irq_restore(flags);
2037
2038 my_udelay(20000L); /* Let it all settle down */
2039
2040 printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]);
2041 if (badspeed)
2042 printk
2043 (" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n",
2044 rcor >> 5, rbpr);
2045 } /* serial_console_init */
2046
2047 static const struct tty_operations cy_ops = {
2048 .open = cy_open,
2049 .close = cy_close,
2050 .write = cy_write,
2051 .put_char = cy_put_char,
2052 .flush_chars = cy_flush_chars,
2053 .write_room = cy_write_room,
2054 .chars_in_buffer = cy_chars_in_buffer,
2055 .flush_buffer = cy_flush_buffer,
2056 .ioctl = cy_ioctl,
2057 .throttle = cy_throttle,
2058 .unthrottle = cy_unthrottle,
2059 .set_termios = cy_set_termios,
2060 .stop = cy_stop,
2061 .start = cy_start,
2062 .hangup = cy_hangup,
2063 .tiocmget = cy_tiocmget,
2064 .tiocmset = cy_tiocmset,
2065 };
2066
2067 /* The serial driver boot-time initialization code!
2068 Hardware I/O ports are mapped to character special devices on a
2069 first found, first allocated manner. That is, this code searches
2070 for Cyclom cards in the system. As each is found, it is probed
2071 to discover how many chips (and thus how many ports) are present.
2072 These ports are mapped to the tty ports 64 and upward in monotonic
2073 fashion. If an 8-port card is replaced with a 16-port card, the
2074 port mapping on a following card will shift.
2075
2076 This approach is different from what is used in the other serial
2077 device driver because the Cyclom is more properly a multiplexer,
2078 not just an aggregation of serial ports on one card.
2079
2080 If there are more cards with more ports than have been statically
2081 allocated above, a warning is printed and the extra ports are ignored.
2082 */
2083 static int __init serial167_init(void)
2084 {
2085 struct cyclades_port *info;
2086 int ret = 0;
2087 int good_ports = 0;
2088 int port_num = 0;
2089 int index;
2090 int DefSpeed;
2091 #ifdef notyet
2092 struct sigaction sa;
2093 #endif
2094
2095 if (!(mvme16x_config & MVME16x_CONFIG_GOT_CD2401))
2096 return 0;
2097
2098 cy_serial_driver = alloc_tty_driver(NR_PORTS);
2099 if (!cy_serial_driver)
2100 return -ENOMEM;
2101
2102 #if 0
2103 scrn[1] = '\0';
2104 #endif
2105
2106 show_version();
2107
2108 /* Has "console=0,9600n8" been used in bootinfo to change speed? */
2109 if (serial_console_cflag)
2110 DefSpeed = serial_console_cflag & 0017;
2111 else {
2112 DefSpeed = initial_console_speed;
2113 serial_console_info = &cy_port[0];
2114 serial_console_cflag = DefSpeed | CS8;
2115 #if 0
2116 serial_console = 64; /*callout_driver.minor_start */
2117 #endif
2118 }
2119
2120 /* Initialize the tty_driver structure */
2121
2122 cy_serial_driver->owner = THIS_MODULE;
2123 cy_serial_driver->name = "ttyS";
2124 cy_serial_driver->major = TTY_MAJOR;
2125 cy_serial_driver->minor_start = 64;
2126 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2127 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
2128 cy_serial_driver->init_termios = tty_std_termios;
2129 cy_serial_driver->init_termios.c_cflag =
2130 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2131 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
2132 tty_set_operations(cy_serial_driver, &cy_ops);
2133
2134 ret = tty_register_driver(cy_serial_driver);
2135 if (ret) {
2136 printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n");
2137 put_tty_driver(cy_serial_driver);
2138 return ret;
2139 }
2140
2141 port_num = 0;
2142 info = cy_port;
2143 for (index = 0; index < 1; index++) {
2144
2145 good_ports = 4;
2146
2147 if (port_num < NR_PORTS) {
2148 while (good_ports-- && port_num < NR_PORTS) {
2149 /*** initialize port ***/
2150 info->magic = CYCLADES_MAGIC;
2151 info->type = PORT_CIRRUS;
2152 info->card = index;
2153 info->line = port_num;
2154 info->flags = STD_COM_FLAGS;
2155 info->tty = NULL;
2156 info->xmit_fifo_size = 12;
2157 info->cor1 = CyPARITY_NONE | Cy_8_BITS;
2158 info->cor2 = CyETC;
2159 info->cor3 = Cy_1_STOP;
2160 info->cor4 = 0x08; /* _very_ small receive threshold */
2161 info->cor5 = 0;
2162 info->cor6 = 0;
2163 info->cor7 = 0;
2164 info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */
2165 info->tco = baud_co[DefSpeed]; /* Tx CO */
2166 info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */
2167 info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */
2168 info->close_delay = 0;
2169 info->x_char = 0;
2170 info->count = 0;
2171 #ifdef SERIAL_DEBUG_COUNT
2172 printk("cyc: %d: setting count to 0\n",
2173 __LINE__);
2174 #endif
2175 info->blocked_open = 0;
2176 info->default_threshold = 0;
2177 info->default_timeout = 0;
2178 init_waitqueue_head(&info->open_wait);
2179 init_waitqueue_head(&info->close_wait);
2180 /* info->session */
2181 /* info->pgrp */
2182 /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/
2183 info->read_status_mask =
2184 CyTIMEOUT | CySPECHAR | CyBREAK | CyPARITY |
2185 CyFRAME | CyOVERRUN;
2186 /* info->timeout */
2187
2188 printk("ttyS%d ", info->line);
2189 port_num++;
2190 info++;
2191 if (!(port_num & 7)) {
2192 printk("\n ");
2193 }
2194 }
2195 }
2196 printk("\n");
2197 }
2198 while (port_num < NR_PORTS) {
2199 info->line = -1;
2200 port_num++;
2201 info++;
2202 }
2203 #ifdef CONFIG_REMOTE_DEBUG
2204 debug_setup();
2205 #endif
2206 ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
2207 "cd2401_errors", cd2401_rxerr_interrupt);
2208 if (ret) {
2209 printk(KERN_ERR "Could't get cd2401_errors IRQ");
2210 goto cleanup_serial_driver;
2211 }
2212
2213 ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
2214 "cd2401_modem", cd2401_modem_interrupt);
2215 if (ret) {
2216 printk(KERN_ERR "Could't get cd2401_modem IRQ");
2217 goto cleanup_irq_cd2401_errors;
2218 }
2219
2220 ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
2221 "cd2401_txints", cd2401_tx_interrupt);
2222 if (ret) {
2223 printk(KERN_ERR "Could't get cd2401_txints IRQ");
2224 goto cleanup_irq_cd2401_modem;
2225 }
2226
2227 ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
2228 "cd2401_rxints", cd2401_rx_interrupt);
2229 if (ret) {
2230 printk(KERN_ERR "Could't get cd2401_rxints IRQ");
2231 goto cleanup_irq_cd2401_txints;
2232 }
2233
2234 /* Now we have registered the interrupt handlers, allow the interrupts */
2235
2236 pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */
2237 pcc2chip[PccSCCTICR] = 0x15;
2238 pcc2chip[PccSCCRICR] = 0x15;
2239
2240 pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */
2241
2242 return 0;
2243 cleanup_irq_cd2401_txints:
2244 free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt);
2245 cleanup_irq_cd2401_modem:
2246 free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt);
2247 cleanup_irq_cd2401_errors:
2248 free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt);
2249 cleanup_serial_driver:
2250 if (tty_unregister_driver(cy_serial_driver))
2251 printk(KERN_ERR
2252 "Couldn't unregister MVME166/7 serial driver\n");
2253 put_tty_driver(cy_serial_driver);
2254 return ret;
2255 } /* serial167_init */
2256
2257 module_init(serial167_init);
2258
2259 #ifdef CYCLOM_SHOW_STATUS
2260 static void show_status(int line_num)
2261 {
2262 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2263 int channel;
2264 struct cyclades_port *info;
2265 unsigned long flags;
2266
2267 info = &cy_port[line_num];
2268 channel = info->line;
2269 printk(" channel %d\n", channel);
2270 /**/ printk(" cy_port\n");
2271 printk(" card line flags = %d %d %x\n",
2272 info->card, info->line, info->flags);
2273 printk
2274 (" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n",
2275 (long)info->tty, info->read_status_mask, info->timeout,
2276 info->xmit_fifo_size);
2277 printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n",
2278 info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
2279 info->cor6, info->cor7);
2280 printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", info->tbpr, info->tco,
2281 info->rbpr, info->rco);
2282 printk(" close_delay event count = %d %d %d\n", info->close_delay,
2283 info->event, info->count);
2284 printk(" x_char blocked_open = %x %x\n", info->x_char,
2285 info->blocked_open);
2286 printk(" open_wait = %lx %lx %lx\n", (long)info->open_wait);
2287
2288 local_irq_save(flags);
2289
2290 /* Global Registers */
2291
2292 printk(" CyGFRCR %x\n", base_addr[CyGFRCR]);
2293 printk(" CyCAR %x\n", base_addr[CyCAR]);
2294 printk(" CyRISR %x\n", base_addr[CyRISR]);
2295 printk(" CyTISR %x\n", base_addr[CyTISR]);
2296 printk(" CyMISR %x\n", base_addr[CyMISR]);
2297 printk(" CyRIR %x\n", base_addr[CyRIR]);
2298 printk(" CyTIR %x\n", base_addr[CyTIR]);
2299 printk(" CyMIR %x\n", base_addr[CyMIR]);
2300 printk(" CyTPR %x\n", base_addr[CyTPR]);
2301
2302 base_addr[CyCAR] = (u_char) channel;
2303
2304 /* Virtual Registers */
2305
2306 #if 0
2307 printk(" CyRIVR %x\n", base_addr[CyRIVR]);
2308 printk(" CyTIVR %x\n", base_addr[CyTIVR]);
2309 printk(" CyMIVR %x\n", base_addr[CyMIVR]);
2310 printk(" CyMISR %x\n", base_addr[CyMISR]);
2311 #endif
2312
2313 /* Channel Registers */
2314
2315 printk(" CyCCR %x\n", base_addr[CyCCR]);
2316 printk(" CyIER %x\n", base_addr[CyIER]);
2317 printk(" CyCOR1 %x\n", base_addr[CyCOR1]);
2318 printk(" CyCOR2 %x\n", base_addr[CyCOR2]);
2319 printk(" CyCOR3 %x\n", base_addr[CyCOR3]);
2320 printk(" CyCOR4 %x\n", base_addr[CyCOR4]);
2321 printk(" CyCOR5 %x\n", base_addr[CyCOR5]);
2322 #if 0
2323 printk(" CyCCSR %x\n", base_addr[CyCCSR]);
2324 printk(" CyRDCR %x\n", base_addr[CyRDCR]);
2325 #endif
2326 printk(" CySCHR1 %x\n", base_addr[CySCHR1]);
2327 printk(" CySCHR2 %x\n", base_addr[CySCHR2]);
2328 #if 0
2329 printk(" CySCHR3 %x\n", base_addr[CySCHR3]);
2330 printk(" CySCHR4 %x\n", base_addr[CySCHR4]);
2331 printk(" CySCRL %x\n", base_addr[CySCRL]);
2332 printk(" CySCRH %x\n", base_addr[CySCRH]);
2333 printk(" CyLNC %x\n", base_addr[CyLNC]);
2334 printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]);
2335 printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]);
2336 #endif
2337 printk(" CyRTPRL %x\n", base_addr[CyRTPRL]);
2338 printk(" CyRTPRH %x\n", base_addr[CyRTPRH]);
2339 printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]);
2340 printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]);
2341 printk(" CyRBPR %x\n", base_addr[CyRBPR]);
2342 printk(" CyRCOR %x\n", base_addr[CyRCOR]);
2343 printk(" CyTBPR %x\n", base_addr[CyTBPR]);
2344 printk(" CyTCOR %x\n", base_addr[CyTCOR]);
2345
2346 local_irq_restore(flags);
2347 } /* show_status */
2348 #endif
2349
2350 #if 0
2351 /* Dummy routine in mvme16x/config.c for now */
2352
2353 /* Serial console setup. Called from linux/init/main.c */
2354
2355 void console_setup(char *str, int *ints)
2356 {
2357 char *s;
2358 int baud, bits, parity;
2359 int cflag = 0;
2360
2361 /* Sanity check. */
2362 if (ints[0] > 3 || ints[1] > 3)
2363 return;
2364
2365 /* Get baud, bits and parity */
2366 baud = 2400;
2367 bits = 8;
2368 parity = 'n';
2369 if (ints[2])
2370 baud = ints[2];
2371 if ((s = strchr(str, ','))) {
2372 do {
2373 s++;
2374 } while (*s >= '0' && *s <= '9');
2375 if (*s)
2376 parity = *s++;
2377 if (*s)
2378 bits = *s - '0';
2379 }
2380
2381 /* Now construct a cflag setting. */
2382 switch (baud) {
2383 case 1200:
2384 cflag |= B1200;
2385 break;
2386 case 9600:
2387 cflag |= B9600;
2388 break;
2389 case 19200:
2390 cflag |= B19200;
2391 break;
2392 case 38400:
2393 cflag |= B38400;
2394 break;
2395 case 2400:
2396 default:
2397 cflag |= B2400;
2398 break;
2399 }
2400 switch (bits) {
2401 case 7:
2402 cflag |= CS7;
2403 break;
2404 default:
2405 case 8:
2406 cflag |= CS8;
2407 break;
2408 }
2409 switch (parity) {
2410 case 'o':
2411 case 'O':
2412 cflag |= PARODD;
2413 break;
2414 case 'e':
2415 case 'E':
2416 cflag |= PARENB;
2417 break;
2418 }
2419
2420 serial_console_info = &cy_port[ints[1]];
2421 serial_console_cflag = cflag;
2422 serial_console = ints[1] + 64; /*callout_driver.minor_start */
2423 }
2424 #endif
2425
2426 /*
2427 * The following is probably out of date for 2.1.x serial console stuff.
2428 *
2429 * The console is registered early on from arch/m68k/kernel/setup.c, and
2430 * it therefore relies on the chip being setup correctly by 166-Bug. This
2431 * seems reasonable, as the serial port has been used to invoke the system
2432 * boot. It also means that this function must not rely on any data
2433 * initialisation performed by serial167_init() etc.
2434 *
2435 * Of course, once the console has been registered, we had better ensure
2436 * that serial167_init() doesn't leave the chip non-functional.
2437 *
2438 * The console must be locked when we get here.
2439 */
2440
2441 void serial167_console_write(struct console *co, const char *str,
2442 unsigned count)
2443 {
2444 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2445 unsigned long flags;
2446 volatile u_char sink;
2447 u_char ier;
2448 int port;
2449 u_char do_lf = 0;
2450 int i = 0;
2451
2452 local_irq_save(flags);
2453
2454 /* Ensure transmitter is enabled! */
2455
2456 port = 0;
2457 base_addr[CyCAR] = (u_char) port;
2458 while (base_addr[CyCCR])
2459 ;
2460 base_addr[CyCCR] = CyENB_XMTR;
2461
2462 ier = base_addr[CyIER];
2463 base_addr[CyIER] = CyTxMpty;
2464
2465 while (1) {
2466 if (pcc2chip[PccSCCTICR] & 0x20) {
2467 /* We have a Tx int. Acknowledge it */
2468 sink = pcc2chip[PccTPIACKR];
2469 if ((base_addr[CyLICR] >> 2) == port) {
2470 if (i == count) {
2471 /* Last char of string is now output */
2472 base_addr[CyTEOIR] = CyNOTRANS;
2473 break;
2474 }
2475 if (do_lf) {
2476 base_addr[CyTDR] = '\n';
2477 str++;
2478 i++;
2479 do_lf = 0;
2480 } else if (*str == '\n') {
2481 base_addr[CyTDR] = '\r';
2482 do_lf = 1;
2483 } else {
2484 base_addr[CyTDR] = *str++;
2485 i++;
2486 }
2487 base_addr[CyTEOIR] = 0;
2488 } else
2489 base_addr[CyTEOIR] = CyNOTRANS;
2490 }
2491 }
2492
2493 base_addr[CyIER] = ier;
2494
2495 local_irq_restore(flags);
2496 }
2497
2498 static struct tty_driver *serial167_console_device(struct console *c,
2499 int *index)
2500 {
2501 *index = c->index;
2502 return cy_serial_driver;
2503 }
2504
2505 static struct console sercons = {
2506 .name = "ttyS",
2507 .write = serial167_console_write,
2508 .device = serial167_console_device,
2509 .flags = CON_PRINTBUFFER,
2510 .index = -1,
2511 };
2512
2513 static int __init serial167_console_init(void)
2514 {
2515 if (vme_brdtype == VME_TYPE_MVME166 ||
2516 vme_brdtype == VME_TYPE_MVME167 ||
2517 vme_brdtype == VME_TYPE_MVME177) {
2518 mvme167_serial_console_setup(0);
2519 register_console(&sercons);
2520 }
2521 return 0;
2522 }
2523
2524 console_initcall(serial167_console_init);
2525
2526 #ifdef CONFIG_REMOTE_DEBUG
2527 void putDebugChar(int c)
2528 {
2529 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2530 unsigned long flags;
2531 volatile u_char sink;
2532 u_char ier;
2533 int port;
2534
2535 local_irq_save(flags);
2536
2537 /* Ensure transmitter is enabled! */
2538
2539 port = DEBUG_PORT;
2540 base_addr[CyCAR] = (u_char) port;
2541 while (base_addr[CyCCR])
2542 ;
2543 base_addr[CyCCR] = CyENB_XMTR;
2544
2545 ier = base_addr[CyIER];
2546 base_addr[CyIER] = CyTxMpty;
2547
2548 while (1) {
2549 if (pcc2chip[PccSCCTICR] & 0x20) {
2550 /* We have a Tx int. Acknowledge it */
2551 sink = pcc2chip[PccTPIACKR];
2552 if ((base_addr[CyLICR] >> 2) == port) {
2553 base_addr[CyTDR] = c;
2554 base_addr[CyTEOIR] = 0;
2555 break;
2556 } else
2557 base_addr[CyTEOIR] = CyNOTRANS;
2558 }
2559 }
2560
2561 base_addr[CyIER] = ier;
2562
2563 local_irq_restore(flags);
2564 }
2565
2566 int getDebugChar()
2567 {
2568 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2569 unsigned long flags;
2570 volatile u_char sink;
2571 u_char ier;
2572 int port;
2573 int i, c;
2574
2575 i = debugiq.out;
2576 if (i != debugiq.in) {
2577 c = debugiq.buf[i];
2578 if (++i == DEBUG_LEN)
2579 i = 0;
2580 debugiq.out = i;
2581 return c;
2582 }
2583 /* OK, nothing in queue, wait in poll loop */
2584
2585 local_irq_save(flags);
2586
2587 /* Ensure receiver is enabled! */
2588
2589 port = DEBUG_PORT;
2590 base_addr[CyCAR] = (u_char) port;
2591 #if 0
2592 while (base_addr[CyCCR])
2593 ;
2594 base_addr[CyCCR] = CyENB_RCVR;
2595 #endif
2596 ier = base_addr[CyIER];
2597 base_addr[CyIER] = CyRxData;
2598
2599 while (1) {
2600 if (pcc2chip[PccSCCRICR] & 0x20) {
2601 /* We have a Rx int. Acknowledge it */
2602 sink = pcc2chip[PccRPIACKR];
2603 if ((base_addr[CyLICR] >> 2) == port) {
2604 int cnt = base_addr[CyRFOC];
2605 while (cnt-- > 0) {
2606 c = base_addr[CyRDR];
2607 if (c == 0)
2608 printk
2609 ("!! debug char is null (cnt=%d) !!",
2610 cnt);
2611 else
2612 queueDebugChar(c);
2613 }
2614 base_addr[CyREOIR] = 0;
2615 i = debugiq.out;
2616 if (i == debugiq.in)
2617 panic("Debug input queue empty!");
2618 c = debugiq.buf[i];
2619 if (++i == DEBUG_LEN)
2620 i = 0;
2621 debugiq.out = i;
2622 break;
2623 } else
2624 base_addr[CyREOIR] = CyNOTRANS;
2625 }
2626 }
2627
2628 base_addr[CyIER] = ier;
2629
2630 local_irq_restore(flags);
2631
2632 return (c);
2633 }
2634
2635 void queueDebugChar(int c)
2636 {
2637 int i;
2638
2639 i = debugiq.in;
2640 debugiq.buf[i] = c;
2641 if (++i == DEBUG_LEN)
2642 i = 0;
2643 if (i != debugiq.out)
2644 debugiq.in = i;
2645 }
2646
2647 static void debug_setup()
2648 {
2649 unsigned long flags;
2650 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2651 int i, cflag;
2652
2653 cflag = B19200;
2654
2655 local_irq_save(flags);
2656
2657 for (i = 0; i < 4; i++) {
2658 base_addr[CyCAR] = i;
2659 base_addr[CyLICR] = i << 2;
2660 }
2661
2662 debugiq.in = debugiq.out = 0;
2663
2664 base_addr[CyCAR] = DEBUG_PORT;
2665
2666 /* baud rate */
2667 i = cflag & CBAUD;
2668
2669 base_addr[CyIER] = 0;
2670
2671 base_addr[CyCMR] = CyASYNC;
2672 base_addr[CyLICR] = DEBUG_PORT << 2;
2673 base_addr[CyLIVR] = 0x5c;
2674
2675 /* tx and rx baud rate */
2676
2677 base_addr[CyTCOR] = baud_co[i];
2678 base_addr[CyTBPR] = baud_bpr[i];
2679 base_addr[CyRCOR] = baud_co[i] >> 5;
2680 base_addr[CyRBPR] = baud_bpr[i];
2681
2682 /* set line characteristics according configuration */
2683
2684 base_addr[CySCHR1] = 0;
2685 base_addr[CySCHR2] = 0;
2686 base_addr[CySCRL] = 0;
2687 base_addr[CySCRH] = 0;
2688 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
2689 base_addr[CyCOR2] = 0;
2690 base_addr[CyCOR3] = Cy_1_STOP;
2691 base_addr[CyCOR4] = baud_cor4[i];
2692 base_addr[CyCOR5] = 0;
2693 base_addr[CyCOR6] = 0;
2694 base_addr[CyCOR7] = 0;
2695
2696 write_cy_cmd(base_addr, CyINIT_CHAN);
2697 write_cy_cmd(base_addr, CyENB_RCVR);
2698
2699 base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */
2700
2701 base_addr[CyRTPRL] = 2;
2702 base_addr[CyRTPRH] = 0;
2703
2704 base_addr[CyMSVR1] = CyRTS;
2705 base_addr[CyMSVR2] = CyDTR;
2706
2707 base_addr[CyIER] = CyRxData;
2708
2709 local_irq_restore(flags);
2710
2711 } /* debug_setup */
2712
2713 #endif
2714
2715 MODULE_LICENSE("GPL");
Linux for Ginger Game Console