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TTY: Add tty ioctl to figure device node of the system console.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / serial167.c
blobf646725bd567ec279541dd968e9a1653746035fe
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/smp_lock.h>
56 #include <linux/string.h>
57 #include <linux/fcntl.h>
58 #include <linux/ptrace.h>
59 #include <linux/serial167.h>
60 #include <linux/delay.h>
61 #include <linux/major.h>
62 #include <linux/mm.h>
63 #include <linux/console.h>
64 #include <linux/module.h>
65 #include <linux/bitops.h>
66 #include <linux/tty_flip.h>
67 #include <linux/gfp.h>
68
69 #include <asm/system.h>
70 #include <asm/io.h>
71 #include <asm/mvme16xhw.h>
72 #include <asm/bootinfo.h>
73 #include <asm/setup.h>
74
75 #include <linux/types.h>
76 #include <linux/kernel.h>
77
78 #include <asm/uaccess.h>
79 #include <linux/init.h>
80
81 #define SERIAL_PARANOIA_CHECK
82 #undef SERIAL_DEBUG_OPEN
83 #undef SERIAL_DEBUG_THROTTLE
84 #undef SERIAL_DEBUG_OTHER
85 #undef SERIAL_DEBUG_IO
86 #undef SERIAL_DEBUG_COUNT
87 #undef SERIAL_DEBUG_DTR
88 #undef CYCLOM_16Y_HACK
89 #define CYCLOM_ENABLE_MONITORING
90
91 #define WAKEUP_CHARS 256
92
93 #define STD_COM_FLAGS (0)
94
95 static struct tty_driver *cy_serial_driver;
96 extern int serial_console;
97 static struct cyclades_port *serial_console_info = NULL;
98 static unsigned int serial_console_cflag = 0;
99 u_char initial_console_speed;
100
101 /* Base address of cd2401 chip on mvme166/7 */
102
103 #define BASE_ADDR (0xfff45000)
104 #define pcc2chip ((volatile u_char *)0xfff42000)
105 #define PccSCCMICR 0x1d
106 #define PccSCCTICR 0x1e
107 #define PccSCCRICR 0x1f
108 #define PccTPIACKR 0x25
109 #define PccRPIACKR 0x27
110 #define PccIMLR 0x3f
111
112 /* This is the per-port data structure */
113 struct cyclades_port cy_port[] = {
114 /* CARD# */
115 {-1}, /* ttyS0 */
116 {-1}, /* ttyS1 */
117 {-1}, /* ttyS2 */
118 {-1}, /* ttyS3 */
119 };
120
121 #define NR_PORTS ARRAY_SIZE(cy_port)
122
123 /*
124 * This is used to look up the divisor speeds and the timeouts
125 * We're normally limited to 15 distinct baud rates. The extra
126 * are accessed via settings in info->flags.
127 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
128 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
129 * HI VHI
130 */
131 static int baud_table[] = {
132 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
133 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
134 0
135 };
136
137 #if 0
138 static char baud_co[] = { /* 25 MHz clock option table */
139 /* value => 00 01 02 03 04 */
140 /* divide by 8 32 128 512 2048 */
141 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
142 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
143 };
144
145 static char baud_bpr[] = { /* 25 MHz baud rate period table */
146 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
147 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
148 };
149 #endif
150
151 /* I think 166 brd clocks 2401 at 20MHz.... */
152
153 /* These values are written directly to tcor, and >> 5 for writing to rcor */
154 static u_char baud_co[] = { /* 20 MHz clock option table */
155 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40,
156 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
157 };
158
159 /* These values written directly to tbpr/rbpr */
160 static u_char baud_bpr[] = { /* 20 MHz baud rate period table */
161 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81,
162 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10
163 };
164
165 static u_char baud_cor4[] = { /* receive threshold */
166 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
167 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07
168 };
169
170 static void shutdown(struct cyclades_port *);
171 static int startup(struct cyclades_port *);
172 static void cy_throttle(struct tty_struct *);
173 static void cy_unthrottle(struct tty_struct *);
174 static void config_setup(struct cyclades_port *);
175 #ifdef CYCLOM_SHOW_STATUS
176 static void show_status(int);
177 #endif
178
179 /*
180 * I have my own version of udelay(), as it is needed when initialising
181 * the chip, before the delay loop has been calibrated. Should probably
182 * reference one of the vmechip2 or pccchip2 counter for an accurate
183 * delay, but this wild guess will do for now.
184 */
185
186 void my_udelay(long us)
187 {
188 u_char x;
189 volatile u_char *p = &x;
190 int i;
191
192 while (us--)
193 for (i = 100; i; i--)
194 x |= *p;
195 }
196
197 static inline int serial_paranoia_check(struct cyclades_port *info, char *name,
198 const char *routine)
199 {
200 #ifdef SERIAL_PARANOIA_CHECK
201 if (!info) {
202 printk("Warning: null cyclades_port for (%s) in %s\n", name,
203 routine);
204 return 1;
205 }
206
207 if (info < &cy_port[0] || info >= &cy_port[NR_PORTS]) {
208 printk("Warning: cyclades_port out of range for (%s) in %s\n",
209 name, routine);
210 return 1;
211 }
212
213 if (info->magic != CYCLADES_MAGIC) {
214 printk("Warning: bad magic number for serial struct (%s) in "
215 "%s\n", name, routine);
216 return 1;
217 }
218 #endif
219 return 0;
220 } /* serial_paranoia_check */
221
222 #if 0
223 /* The following diagnostic routines allow the driver to spew
224 information on the screen, even (especially!) during interrupts.
225 */
226 void SP(char *data)
227 {
228 unsigned long flags;
229 local_irq_save(flags);
230 printk(KERN_EMERG "%s", data);
231 local_irq_restore(flags);
232 }
233
234 char scrn[2];
235 void CP(char data)
236 {
237 unsigned long flags;
238 local_irq_save(flags);
239 scrn[0] = data;
240 printk(KERN_EMERG "%c", scrn);
241 local_irq_restore(flags);
242 } /* CP */
243
244 void CP1(int data)
245 {
246 (data < 10) ? CP(data + '0') : CP(data + 'A' - 10);
247 } /* CP1 */
248 void CP2(int data)
249 {
250 CP1((data >> 4) & 0x0f);
251 CP1(data & 0x0f);
252 } /* CP2 */
253 void CP4(int data)
254 {
255 CP2((data >> 8) & 0xff);
256 CP2(data & 0xff);
257 } /* CP4 */
258 void CP8(long data)
259 {
260 CP4((data >> 16) & 0xffff);
261 CP4(data & 0xffff);
262 } /* CP8 */
263 #endif
264
265 /* This routine waits up to 1000 micro-seconds for the previous
266 command to the Cirrus chip to complete and then issues the
267 new command. An error is returned if the previous command
268 didn't finish within the time limit.
269 */
270 u_short write_cy_cmd(volatile u_char * base_addr, u_char cmd)
271 {
272 unsigned long flags;
273 volatile int i;
274
275 local_irq_save(flags);
276 /* Check to see that the previous command has completed */
277 for (i = 0; i < 100; i++) {
278 if (base_addr[CyCCR] == 0) {
279 break;
280 }
281 my_udelay(10L);
282 }
283 /* if the CCR never cleared, the previous command
284 didn't finish within the "reasonable time" */
285 if (i == 10) {
286 local_irq_restore(flags);
287 return (-1);
288 }
289
290 /* Issue the new command */
291 base_addr[CyCCR] = cmd;
292 local_irq_restore(flags);
293 return (0);
294 } /* write_cy_cmd */
295
296 /* cy_start and cy_stop provide software output flow control as a
297 function of XON/XOFF, software CTS, and other such stuff. */
298
299 static void cy_stop(struct tty_struct *tty)
300 {
301 struct cyclades_port *info = tty->driver_data;
302 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
303 int channel;
304 unsigned long flags;
305
306 #ifdef SERIAL_DEBUG_OTHER
307 printk("cy_stop %s\n", tty->name); /* */
308 #endif
309
310 if (serial_paranoia_check(info, tty->name, "cy_stop"))
311 return;
312
313 channel = info->line;
314
315 local_irq_save(flags);
316 base_addr[CyCAR] = (u_char) (channel); /* index channel */
317 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
318 local_irq_restore(flags);
319 } /* cy_stop */
320
321 static void cy_start(struct tty_struct *tty)
322 {
323 struct cyclades_port *info = tty->driver_data;
324 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
325 int channel;
326 unsigned long flags;
327
328 #ifdef SERIAL_DEBUG_OTHER
329 printk("cy_start %s\n", tty->name); /* */
330 #endif
331
332 if (serial_paranoia_check(info, tty->name, "cy_start"))
333 return;
334
335 channel = info->line;
336
337 local_irq_save(flags);
338 base_addr[CyCAR] = (u_char) (channel);
339 base_addr[CyIER] |= CyTxMpty;
340 local_irq_restore(flags);
341 } /* cy_start */
342
343 /* The real interrupt service routines are called
344 whenever the card wants its hand held--chars
345 received, out buffer empty, modem change, etc.
346 */
347 static irqreturn_t cd2401_rxerr_interrupt(int irq, void *dev_id)
348 {
349 struct tty_struct *tty;
350 struct cyclades_port *info;
351 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
352 unsigned char err, rfoc;
353 int channel;
354 char data;
355
356 /* determine the channel and change to that context */
357 channel = (u_short) (base_addr[CyLICR] >> 2);
358 info = &cy_port[channel];
359 info->last_active = jiffies;
360
361 if ((err = base_addr[CyRISR]) & CyTIMEOUT) {
362 /* This is a receive timeout interrupt, ignore it */
363 base_addr[CyREOIR] = CyNOTRANS;
364 return IRQ_HANDLED;
365 }
366
367 /* Read a byte of data if there is any - assume the error
368 * is associated with this character */
369
370 if ((rfoc = base_addr[CyRFOC]) != 0)
371 data = base_addr[CyRDR];
372 else
373 data = 0;
374
375 /* if there is nowhere to put the data, discard it */
376 if (info->tty == 0) {
377 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
378 return IRQ_HANDLED;
379 } else { /* there is an open port for this data */
380 tty = info->tty;
381 if (err & info->ignore_status_mask) {
382 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
383 return IRQ_HANDLED;
384 }
385 if (tty_buffer_request_room(tty, 1) != 0) {
386 if (err & info->read_status_mask) {
387 if (err & CyBREAK) {
388 tty_insert_flip_char(tty, data,
389 TTY_BREAK);
390 if (info->flags & ASYNC_SAK) {
391 do_SAK(tty);
392 }
393 } else if (err & CyFRAME) {
394 tty_insert_flip_char(tty, data,
395 TTY_FRAME);
396 } else if (err & CyPARITY) {
397 tty_insert_flip_char(tty, data,
398 TTY_PARITY);
399 } else if (err & CyOVERRUN) {
400 tty_insert_flip_char(tty, 0,
401 TTY_OVERRUN);
402 /*
403 If the flip buffer itself is
404 overflowing, we still lose
405 the next incoming character.
406 */
407 if (tty_buffer_request_room(tty, 1) !=
408 0) {
409 tty_insert_flip_char(tty, data,
410 TTY_FRAME);
411 }
412 /* These two conditions may imply */
413 /* a normal read should be done. */
414 /* else if(data & CyTIMEOUT) */
415 /* else if(data & CySPECHAR) */
416 } else {
417 tty_insert_flip_char(tty, 0,
418 TTY_NORMAL);
419 }
420 } else {
421 tty_insert_flip_char(tty, data, TTY_NORMAL);
422 }
423 } else {
424 /* there was a software buffer overrun
425 and nothing could be done about it!!! */
426 }
427 }
428 tty_schedule_flip(tty);
429 /* end of service */
430 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
431 return IRQ_HANDLED;
432 } /* cy_rxerr_interrupt */
433
434 static irqreturn_t cd2401_modem_interrupt(int irq, void *dev_id)
435 {
436 struct cyclades_port *info;
437 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
438 int channel;
439 int mdm_change;
440 int mdm_status;
441
442 /* determine the channel and change to that context */
443 channel = (u_short) (base_addr[CyLICR] >> 2);
444 info = &cy_port[channel];
445 info->last_active = jiffies;
446
447 mdm_change = base_addr[CyMISR];
448 mdm_status = base_addr[CyMSVR1];
449
450 if (info->tty == 0) { /* nowhere to put the data, ignore it */
451 ;
452 } else {
453 if ((mdm_change & CyDCD)
454 && (info->flags & ASYNC_CHECK_CD)) {
455 if (mdm_status & CyDCD) {
456 /* CP('!'); */
457 wake_up_interruptible(&info->open_wait);
458 } else {
459 /* CP('@'); */
460 tty_hangup(info->tty);
461 wake_up_interruptible(&info->open_wait);
462 info->flags &= ~ASYNC_NORMAL_ACTIVE;
463 }
464 }
465 if ((mdm_change & CyCTS)
466 && (info->flags & ASYNC_CTS_FLOW)) {
467 if (info->tty->stopped) {
468 if (mdm_status & CyCTS) {
469 /* !!! cy_start isn't used because... */
470 info->tty->stopped = 0;
471 base_addr[CyIER] |= CyTxMpty;
472 tty_wakeup(info->tty);
473 }
474 } else {
475 if (!(mdm_status & CyCTS)) {
476 /* !!! cy_stop isn't used because... */
477 info->tty->stopped = 1;
478 base_addr[CyIER] &=
479 ~(CyTxMpty | CyTxRdy);
480 }
481 }
482 }
483 if (mdm_status & CyDSR) {
484 }
485 }
486 base_addr[CyMEOIR] = 0;
487 return IRQ_HANDLED;
488 } /* cy_modem_interrupt */
489
490 static irqreturn_t cd2401_tx_interrupt(int irq, void *dev_id)
491 {
492 struct cyclades_port *info;
493 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
494 int channel;
495 int char_count, saved_cnt;
496 int outch;
497
498 /* determine the channel and change to that context */
499 channel = (u_short) (base_addr[CyLICR] >> 2);
500
501 /* validate the port number (as configured and open) */
502 if ((channel < 0) || (NR_PORTS <= channel)) {
503 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
504 base_addr[CyTEOIR] = CyNOTRANS;
505 return IRQ_HANDLED;
506 }
507 info = &cy_port[channel];
508 info->last_active = jiffies;
509 if (info->tty == 0) {
510 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
511 base_addr[CyTEOIR] = CyNOTRANS;
512 return IRQ_HANDLED;
513 }
514
515 /* load the on-chip space available for outbound data */
516 saved_cnt = char_count = base_addr[CyTFTC];
517
518 if (info->x_char) { /* send special char */
519 outch = info->x_char;
520 base_addr[CyTDR] = outch;
521 char_count--;
522 info->x_char = 0;
523 }
524
525 if (info->x_break) {
526 /* The Cirrus chip requires the "Embedded Transmit
527 Commands" of start break, delay, and end break
528 sequences to be sent. The duration of the
529 break is given in TICs, which runs at HZ
530 (typically 100) and the PPR runs at 200 Hz,
531 so the delay is duration * 200/HZ, and thus a
532 break can run from 1/100 sec to about 5/4 sec.
533 Need to check these values - RGH 141095.
534 */
535 base_addr[CyTDR] = 0; /* start break */
536 base_addr[CyTDR] = 0x81;
537 base_addr[CyTDR] = 0; /* delay a bit */
538 base_addr[CyTDR] = 0x82;
539 base_addr[CyTDR] = info->x_break * 200 / HZ;
540 base_addr[CyTDR] = 0; /* terminate break */
541 base_addr[CyTDR] = 0x83;
542 char_count -= 7;
543 info->x_break = 0;
544 }
545
546 while (char_count > 0) {
547 if (!info->xmit_cnt) {
548 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
549 break;
550 }
551 if (info->xmit_buf == 0) {
552 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
553 break;
554 }
555 if (info->tty->stopped || info->tty->hw_stopped) {
556 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
557 break;
558 }
559 /* Because the Embedded Transmit Commands have been
560 enabled, we must check to see if the escape
561 character, NULL, is being sent. If it is, we
562 must ensure that there is room for it to be
563 doubled in the output stream. Therefore we
564 no longer advance the pointer when the character
565 is fetched, but rather wait until after the check
566 for a NULL output character. (This is necessary
567 because there may not be room for the two chars
568 needed to send a NULL.
569 */
570 outch = info->xmit_buf[info->xmit_tail];
571 if (outch) {
572 info->xmit_cnt--;
573 info->xmit_tail = (info->xmit_tail + 1)
574 & (PAGE_SIZE - 1);
575 base_addr[CyTDR] = outch;
576 char_count--;
577 } else {
578 if (char_count > 1) {
579 info->xmit_cnt--;
580 info->xmit_tail = (info->xmit_tail + 1)
581 & (PAGE_SIZE - 1);
582 base_addr[CyTDR] = outch;
583 base_addr[CyTDR] = 0;
584 char_count--;
585 char_count--;
586 } else {
587 break;
588 }
589 }
590 }
591
592 if (info->xmit_cnt < WAKEUP_CHARS)
593 tty_wakeup(info->tty);
594
595 base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS;
596 return IRQ_HANDLED;
597 } /* cy_tx_interrupt */
598
599 static irqreturn_t cd2401_rx_interrupt(int irq, void *dev_id)
600 {
601 struct tty_struct *tty;
602 struct cyclades_port *info;
603 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
604 int channel;
605 char data;
606 int char_count;
607 int save_cnt;
608
609 /* determine the channel and change to that context */
610 channel = (u_short) (base_addr[CyLICR] >> 2);
611 info = &cy_port[channel];
612 info->last_active = jiffies;
613 save_cnt = char_count = base_addr[CyRFOC];
614
615 /* if there is nowhere to put the data, discard it */
616 if (info->tty == 0) {
617 while (char_count--) {
618 data = base_addr[CyRDR];
619 }
620 } else { /* there is an open port for this data */
621 tty = info->tty;
622 /* load # characters available from the chip */
623
624 #ifdef CYCLOM_ENABLE_MONITORING
625 ++info->mon.int_count;
626 info->mon.char_count += char_count;
627 if (char_count > info->mon.char_max)
628 info->mon.char_max = char_count;
629 info->mon.char_last = char_count;
630 #endif
631 while (char_count--) {
632 data = base_addr[CyRDR];
633 tty_insert_flip_char(tty, data, TTY_NORMAL);
634 #ifdef CYCLOM_16Y_HACK
635 udelay(10L);
636 #endif
637 }
638 tty_schedule_flip(tty);
639 }
640 /* end of service */
641 base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS;
642 return IRQ_HANDLED;
643 } /* cy_rx_interrupt */
644
645 /* This is called whenever a port becomes active;
646 interrupts are enabled and DTR & RTS are turned on.
647 */
648 static int startup(struct cyclades_port *info)
649 {
650 unsigned long flags;
651 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
652 int channel;
653
654 if (info->flags & ASYNC_INITIALIZED) {
655 return 0;
656 }
657
658 if (!info->type) {
659 if (info->tty) {
660 set_bit(TTY_IO_ERROR, &info->tty->flags);
661 }
662 return 0;
663 }
664 if (!info->xmit_buf) {
665 info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
666 if (!info->xmit_buf) {
667 return -ENOMEM;
668 }
669 }
670
671 config_setup(info);
672
673 channel = info->line;
674
675 #ifdef SERIAL_DEBUG_OPEN
676 printk("startup channel %d\n", channel);
677 #endif
678
679 local_irq_save(flags);
680 base_addr[CyCAR] = (u_char) channel;
681 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
682
683 base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */
684 base_addr[CyMSVR1] = CyRTS;
685 /* CP('S');CP('1'); */
686 base_addr[CyMSVR2] = CyDTR;
687
688 #ifdef SERIAL_DEBUG_DTR
689 printk("cyc: %d: raising DTR\n", __LINE__);
690 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
691 base_addr[CyMSVR2]);
692 #endif
693
694 base_addr[CyIER] |= CyRxData;
695 info->flags |= ASYNC_INITIALIZED;
696
697 if (info->tty) {
698 clear_bit(TTY_IO_ERROR, &info->tty->flags);
699 }
700 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
701
702 local_irq_restore(flags);
703
704 #ifdef SERIAL_DEBUG_OPEN
705 printk(" done\n");
706 #endif
707 return 0;
708 } /* startup */
709
710 void start_xmit(struct cyclades_port *info)
711 {
712 unsigned long flags;
713 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
714 int channel;
715
716 channel = info->line;
717 local_irq_save(flags);
718 base_addr[CyCAR] = channel;
719 base_addr[CyIER] |= CyTxMpty;
720 local_irq_restore(flags);
721 } /* start_xmit */
722
723 /*
724 * This routine shuts down a serial port; interrupts are disabled,
725 * and DTR is dropped if the hangup on close termio flag is on.
726 */
727 static void shutdown(struct cyclades_port *info)
728 {
729 unsigned long flags;
730 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
731 int channel;
732
733 if (!(info->flags & ASYNC_INITIALIZED)) {
734 /* CP('$'); */
735 return;
736 }
737
738 channel = info->line;
739
740 #ifdef SERIAL_DEBUG_OPEN
741 printk("shutdown channel %d\n", channel);
742 #endif
743
744 /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE
745 SENT BEFORE DROPPING THE LINE !!! (Perhaps
746 set some flag that is read when XMTY happens.)
747 Other choices are to delay some fixed interval
748 or schedule some later processing.
749 */
750 local_irq_save(flags);
751 if (info->xmit_buf) {
752 free_page((unsigned long)info->xmit_buf);
753 info->xmit_buf = NULL;
754 }
755
756 base_addr[CyCAR] = (u_char) channel;
757 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
758 base_addr[CyMSVR1] = 0;
759 /* CP('C');CP('1'); */
760 base_addr[CyMSVR2] = 0;
761 #ifdef SERIAL_DEBUG_DTR
762 printk("cyc: %d: dropping DTR\n", __LINE__);
763 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
764 base_addr[CyMSVR2]);
765 #endif
766 }
767 write_cy_cmd(base_addr, CyDIS_RCVR);
768 /* it may be appropriate to clear _XMIT at
769 some later date (after testing)!!! */
770
771 if (info->tty) {
772 set_bit(TTY_IO_ERROR, &info->tty->flags);
773 }
774 info->flags &= ~ASYNC_INITIALIZED;
775 local_irq_restore(flags);
776
777 #ifdef SERIAL_DEBUG_OPEN
778 printk(" done\n");
779 #endif
780 } /* shutdown */
781
782 /*
783 * This routine finds or computes the various line characteristics.
784 */
785 static void config_setup(struct cyclades_port *info)
786 {
787 unsigned long flags;
788 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
789 int channel;
790 unsigned cflag;
791 int i;
792 unsigned char ti, need_init_chan = 0;
793
794 if (!info->tty || !info->tty->termios) {
795 return;
796 }
797 if (info->line == -1) {
798 return;
799 }
800 cflag = info->tty->termios->c_cflag;
801
802 /* baud rate */
803 i = cflag & CBAUD;
804 #ifdef CBAUDEX
805 /* Starting with kernel 1.1.65, there is direct support for
806 higher baud rates. The following code supports those
807 changes. The conditional aspect allows this driver to be
808 used for earlier as well as later kernel versions. (The
809 mapping is slightly different from serial.c because there
810 is still the possibility of supporting 75 kbit/sec with
811 the Cyclades board.)
812 */
813 if (i & CBAUDEX) {
814 if (i == B57600)
815 i = 16;
816 else if (i == B115200)
817 i = 18;
818 #ifdef B78600
819 else if (i == B78600)
820 i = 17;
821 #endif
822 else
823 info->tty->termios->c_cflag &= ~CBAUDEX;
824 }
825 #endif
826 if (i == 15) {
827 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
828 i += 1;
829 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
830 i += 3;
831 }
832 /* Don't ever change the speed of the console port. It will
833 * run at the speed specified in bootinfo, or at 19.2K */
834 /* Actually, it should run at whatever speed 166Bug was using */
835 /* Note info->timeout isn't used at present */
836 if (info != serial_console_info) {
837 info->tbpr = baud_bpr[i]; /* Tx BPR */
838 info->tco = baud_co[i]; /* Tx CO */
839 info->rbpr = baud_bpr[i]; /* Rx BPR */
840 info->rco = baud_co[i] >> 5; /* Rx CO */
841 if (baud_table[i] == 134) {
842 info->timeout =
843 (info->xmit_fifo_size * HZ * 30 / 269) + 2;
844 /* get it right for 134.5 baud */
845 } else if (baud_table[i]) {
846 info->timeout =
847 (info->xmit_fifo_size * HZ * 15 / baud_table[i]) +
848 2;
849 /* this needs to be propagated into the card info */
850 } else {
851 info->timeout = 0;
852 }
853 }
854 /* By tradition (is it a standard?) a baud rate of zero
855 implies the line should be/has been closed. A bit
856 later in this routine such a test is performed. */
857
858 /* byte size and parity */
859 info->cor7 = 0;
860 info->cor6 = 0;
861 info->cor5 = 0;
862 info->cor4 = (info->default_threshold ? info->default_threshold : baud_cor4[i]); /* receive threshold */
863 /* Following two lines added 101295, RGH. */
864 /* It is obviously wrong to access CyCORx, and not info->corx here,
865 * try and remember to fix it later! */
866 channel = info->line;
867 base_addr[CyCAR] = (u_char) channel;
868 if (C_CLOCAL(info->tty)) {
869 if (base_addr[CyIER] & CyMdmCh)
870 base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */
871 /* ignore 1->0 modem transitions */
872 if (base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD))
873 base_addr[CyCOR4] &= ~(CyDSR | CyCTS | CyDCD);
874 /* ignore 0->1 modem transitions */
875 if (base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD))
876 base_addr[CyCOR5] &= ~(CyDSR | CyCTS | CyDCD);
877 } else {
878 if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh)
879 base_addr[CyIER] |= CyMdmCh; /* with modem intr */
880 /* act on 1->0 modem transitions */
881 if ((base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD)) !=
882 (CyDSR | CyCTS | CyDCD))
883 base_addr[CyCOR4] |= CyDSR | CyCTS | CyDCD;
884 /* act on 0->1 modem transitions */
885 if ((base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD)) !=
886 (CyDSR | CyCTS | CyDCD))
887 base_addr[CyCOR5] |= CyDSR | CyCTS | CyDCD;
888 }
889 info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP;
890 info->cor2 = CyETC;
891 switch (cflag & CSIZE) {
892 case CS5:
893 info->cor1 = Cy_5_BITS;
894 break;
895 case CS6:
896 info->cor1 = Cy_6_BITS;
897 break;
898 case CS7:
899 info->cor1 = Cy_7_BITS;
900 break;
901 case CS8:
902 info->cor1 = Cy_8_BITS;
903 break;
904 }
905 if (cflag & PARENB) {
906 if (cflag & PARODD) {
907 info->cor1 |= CyPARITY_O;
908 } else {
909 info->cor1 |= CyPARITY_E;
910 }
911 } else {
912 info->cor1 |= CyPARITY_NONE;
913 }
914
915 /* CTS flow control flag */
916 #if 0
917 /* Don't complcate matters for now! RGH 141095 */
918 if (cflag & CRTSCTS) {
919 info->flags |= ASYNC_CTS_FLOW;
920 info->cor2 |= CyCtsAE;
921 } else {
922 info->flags &= ~ASYNC_CTS_FLOW;
923 info->cor2 &= ~CyCtsAE;
924 }
925 #endif
926 if (cflag & CLOCAL)
927 info->flags &= ~ASYNC_CHECK_CD;
928 else
929 info->flags |= ASYNC_CHECK_CD;
930
931 /***********************************************
932 The hardware option, CyRtsAO, presents RTS when
933 the chip has characters to send. Since most modems
934 use RTS as reverse (inbound) flow control, this
935 option is not used. If inbound flow control is
936 necessary, DTR can be programmed to provide the
937 appropriate signals for use with a non-standard
938 cable. Contact Marcio Saito for details.
939 ***********************************************/
940
941 channel = info->line;
942
943 local_irq_save(flags);
944 base_addr[CyCAR] = (u_char) channel;
945
946 /* CyCMR set once only in mvme167_init_serial() */
947 if (base_addr[CyLICR] != channel << 2)
948 base_addr[CyLICR] = channel << 2;
949 if (base_addr[CyLIVR] != 0x5c)
950 base_addr[CyLIVR] = 0x5c;
951
952 /* tx and rx baud rate */
953
954 if (base_addr[CyCOR1] != info->cor1)
955 need_init_chan = 1;
956 if (base_addr[CyTCOR] != info->tco)
957 base_addr[CyTCOR] = info->tco;
958 if (base_addr[CyTBPR] != info->tbpr)
959 base_addr[CyTBPR] = info->tbpr;
960 if (base_addr[CyRCOR] != info->rco)
961 base_addr[CyRCOR] = info->rco;
962 if (base_addr[CyRBPR] != info->rbpr)
963 base_addr[CyRBPR] = info->rbpr;
964
965 /* set line characteristics according configuration */
966
967 if (base_addr[CySCHR1] != START_CHAR(info->tty))
968 base_addr[CySCHR1] = START_CHAR(info->tty);
969 if (base_addr[CySCHR2] != STOP_CHAR(info->tty))
970 base_addr[CySCHR2] = STOP_CHAR(info->tty);
971 if (base_addr[CySCRL] != START_CHAR(info->tty))
972 base_addr[CySCRL] = START_CHAR(info->tty);
973 if (base_addr[CySCRH] != START_CHAR(info->tty))
974 base_addr[CySCRH] = START_CHAR(info->tty);
975 if (base_addr[CyCOR1] != info->cor1)
976 base_addr[CyCOR1] = info->cor1;
977 if (base_addr[CyCOR2] != info->cor2)
978 base_addr[CyCOR2] = info->cor2;
979 if (base_addr[CyCOR3] != info->cor3)
980 base_addr[CyCOR3] = info->cor3;
981 if (base_addr[CyCOR4] != info->cor4)
982 base_addr[CyCOR4] = info->cor4;
983 if (base_addr[CyCOR5] != info->cor5)
984 base_addr[CyCOR5] = info->cor5;
985 if (base_addr[CyCOR6] != info->cor6)
986 base_addr[CyCOR6] = info->cor6;
987 if (base_addr[CyCOR7] != info->cor7)
988 base_addr[CyCOR7] = info->cor7;
989
990 if (need_init_chan)
991 write_cy_cmd(base_addr, CyINIT_CHAN);
992
993 base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */
994
995 /* 2ms default rx timeout */
996 ti = info->default_timeout ? info->default_timeout : 0x02;
997 if (base_addr[CyRTPRL] != ti)
998 base_addr[CyRTPRL] = ti;
999 if (base_addr[CyRTPRH] != 0)
1000 base_addr[CyRTPRH] = 0;
1001
1002 /* Set up RTS here also ????? RGH 141095 */
1003 if (i == 0) { /* baud rate is zero, turn off line */
1004 if ((base_addr[CyMSVR2] & CyDTR) == CyDTR)
1005 base_addr[CyMSVR2] = 0;
1006 #ifdef SERIAL_DEBUG_DTR
1007 printk("cyc: %d: dropping DTR\n", __LINE__);
1008 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1009 base_addr[CyMSVR2]);
1010 #endif
1011 } else {
1012 if ((base_addr[CyMSVR2] & CyDTR) != CyDTR)
1013 base_addr[CyMSVR2] = CyDTR;
1014 #ifdef SERIAL_DEBUG_DTR
1015 printk("cyc: %d: raising DTR\n", __LINE__);
1016 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1017 base_addr[CyMSVR2]);
1018 #endif
1019 }
1020
1021 if (info->tty) {
1022 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1023 }
1024
1025 local_irq_restore(flags);
1026
1027 } /* config_setup */
1028
1029 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1030 {
1031 struct cyclades_port *info = tty->driver_data;
1032 unsigned long flags;
1033
1034 #ifdef SERIAL_DEBUG_IO
1035 printk("cy_put_char %s(0x%02x)\n", tty->name, ch);
1036 #endif
1037
1038 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1039 return 0;
1040
1041 if (!info->xmit_buf)
1042 return 0;
1043
1044 local_irq_save(flags);
1045 if (info->xmit_cnt >= PAGE_SIZE - 1) {
1046 local_irq_restore(flags);
1047 return 0;
1048 }
1049
1050 info->xmit_buf[info->xmit_head++] = ch;
1051 info->xmit_head &= PAGE_SIZE - 1;
1052 info->xmit_cnt++;
1053 local_irq_restore(flags);
1054 return 1;
1055 } /* cy_put_char */
1056
1057 static void cy_flush_chars(struct tty_struct *tty)
1058 {
1059 struct cyclades_port *info = tty->driver_data;
1060 unsigned long flags;
1061 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1062 int channel;
1063
1064 #ifdef SERIAL_DEBUG_IO
1065 printk("cy_flush_chars %s\n", tty->name); /* */
1066 #endif
1067
1068 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1069 return;
1070
1071 if (info->xmit_cnt <= 0 || tty->stopped
1072 || tty->hw_stopped || !info->xmit_buf)
1073 return;
1074
1075 channel = info->line;
1076
1077 local_irq_save(flags);
1078 base_addr[CyCAR] = channel;
1079 base_addr[CyIER] |= CyTxMpty;
1080 local_irq_restore(flags);
1081 } /* cy_flush_chars */
1082
1083 /* This routine gets called when tty_write has put something into
1084 the write_queue. If the port is not already transmitting stuff,
1085 start it off by enabling interrupts. The interrupt service
1086 routine will then ensure that the characters are sent. If the
1087 port is already active, there is no need to kick it.
1088 */
1089 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1090 {
1091 struct cyclades_port *info = tty->driver_data;
1092 unsigned long flags;
1093 int c, total = 0;
1094
1095 #ifdef SERIAL_DEBUG_IO
1096 printk("cy_write %s\n", tty->name); /* */
1097 #endif
1098
1099 if (serial_paranoia_check(info, tty->name, "cy_write")) {
1100 return 0;
1101 }
1102
1103 if (!info->xmit_buf) {
1104 return 0;
1105 }
1106
1107 while (1) {
1108 local_irq_save(flags);
1109 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1110 SERIAL_XMIT_SIZE - info->xmit_head));
1111 if (c <= 0) {
1112 local_irq_restore(flags);
1113 break;
1114 }
1115
1116 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1117 info->xmit_head =
1118 (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1119 info->xmit_cnt += c;
1120 local_irq_restore(flags);
1121
1122 buf += c;
1123 count -= c;
1124 total += c;
1125 }
1126
1127 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
1128 start_xmit(info);
1129 }
1130 return total;
1131 } /* cy_write */
1132
1133 static int cy_write_room(struct tty_struct *tty)
1134 {
1135 struct cyclades_port *info = tty->driver_data;
1136 int ret;
1137
1138 #ifdef SERIAL_DEBUG_IO
1139 printk("cy_write_room %s\n", tty->name); /* */
1140 #endif
1141
1142 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1143 return 0;
1144 ret = PAGE_SIZE - info->xmit_cnt - 1;
1145 if (ret < 0)
1146 ret = 0;
1147 return ret;
1148 } /* cy_write_room */
1149
1150 static int cy_chars_in_buffer(struct tty_struct *tty)
1151 {
1152 struct cyclades_port *info = tty->driver_data;
1153
1154 #ifdef SERIAL_DEBUG_IO
1155 printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */
1156 #endif
1157
1158 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1159 return 0;
1160
1161 return info->xmit_cnt;
1162 } /* cy_chars_in_buffer */
1163
1164 static void cy_flush_buffer(struct tty_struct *tty)
1165 {
1166 struct cyclades_port *info = tty->driver_data;
1167 unsigned long flags;
1168
1169 #ifdef SERIAL_DEBUG_IO
1170 printk("cy_flush_buffer %s\n", tty->name); /* */
1171 #endif
1172
1173 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1174 return;
1175 local_irq_save(flags);
1176 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1177 local_irq_restore(flags);
1178 tty_wakeup(tty);
1179 } /* cy_flush_buffer */
1180
1181 /* This routine is called by the upper-layer tty layer to signal
1182 that incoming characters should be throttled or that the
1183 throttle should be released.
1184 */
1185 static void cy_throttle(struct tty_struct *tty)
1186 {
1187 struct cyclades_port *info = tty->driver_data;
1188 unsigned long flags;
1189 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1190 int channel;
1191
1192 #ifdef SERIAL_DEBUG_THROTTLE
1193 char buf[64];
1194
1195 printk("throttle %s: %d....\n", tty_name(tty, buf),
1196 tty->ldisc.chars_in_buffer(tty));
1197 printk("cy_throttle %s\n", tty->name);
1198 #endif
1199
1200 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1201 return;
1202 }
1203
1204 if (I_IXOFF(tty)) {
1205 info->x_char = STOP_CHAR(tty);
1206 /* Should use the "Send Special Character" feature!!! */
1207 }
1208
1209 channel = info->line;
1210
1211 local_irq_save(flags);
1212 base_addr[CyCAR] = (u_char) channel;
1213 base_addr[CyMSVR1] = 0;
1214 local_irq_restore(flags);
1215 } /* cy_throttle */
1216
1217 static void cy_unthrottle(struct tty_struct *tty)
1218 {
1219 struct cyclades_port *info = tty->driver_data;
1220 unsigned long flags;
1221 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1222 int channel;
1223
1224 #ifdef SERIAL_DEBUG_THROTTLE
1225 char buf[64];
1226
1227 printk("throttle %s: %d....\n", tty_name(tty, buf),
1228 tty->ldisc.chars_in_buffer(tty));
1229 printk("cy_unthrottle %s\n", tty->name);
1230 #endif
1231
1232 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1233 return;
1234 }
1235
1236 if (I_IXOFF(tty)) {
1237 info->x_char = START_CHAR(tty);
1238 /* Should use the "Send Special Character" feature!!! */
1239 }
1240
1241 channel = info->line;
1242
1243 local_irq_save(flags);
1244 base_addr[CyCAR] = (u_char) channel;
1245 base_addr[CyMSVR1] = CyRTS;
1246 local_irq_restore(flags);
1247 } /* cy_unthrottle */
1248
1249 static int
1250 get_serial_info(struct cyclades_port *info,
1251 struct serial_struct __user * retinfo)
1252 {
1253 struct serial_struct tmp;
1254
1255 /* CP('g'); */
1256 if (!retinfo)
1257 return -EFAULT;
1258 memset(&tmp, 0, sizeof(tmp));
1259 tmp.type = info->type;
1260 tmp.line = info->line;
1261 tmp.port = info->line;
1262 tmp.irq = 0;
1263 tmp.flags = info->flags;
1264 tmp.baud_base = 0; /*!!! */
1265 tmp.close_delay = info->close_delay;
1266 tmp.custom_divisor = 0; /*!!! */
1267 tmp.hub6 = 0; /*!!! */
1268 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1269 } /* get_serial_info */
1270
1271 static int
1272 set_serial_info(struct cyclades_port *info,
1273 struct serial_struct __user * new_info)
1274 {
1275 struct serial_struct new_serial;
1276 struct cyclades_port old_info;
1277
1278 /* CP('s'); */
1279 if (!new_info)
1280 return -EFAULT;
1281 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1282 return -EFAULT;
1283 old_info = *info;
1284
1285 if (!capable(CAP_SYS_ADMIN)) {
1286 if ((new_serial.close_delay != info->close_delay) ||
1287 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
1288 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
1289 return -EPERM;
1290 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1291 (new_serial.flags & ASYNC_USR_MASK));
1292 goto check_and_exit;
1293 }
1294
1295 /*
1296 * OK, past this point, all the error checking has been done.
1297 * At this point, we start making changes.....
1298 */
1299
1300 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1301 (new_serial.flags & ASYNC_FLAGS));
1302 info->close_delay = new_serial.close_delay;
1303
1304 check_and_exit:
1305 if (info->flags & ASYNC_INITIALIZED) {
1306 config_setup(info);
1307 return 0;
1308 }
1309 return startup(info);
1310 } /* set_serial_info */
1311
1312 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1313 {
1314 struct cyclades_port *info = tty->driver_data;
1315 int channel;
1316 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1317 unsigned long flags;
1318 unsigned char status;
1319
1320 channel = info->line;
1321
1322 local_irq_save(flags);
1323 base_addr[CyCAR] = (u_char) channel;
1324 status = base_addr[CyMSVR1] | base_addr[CyMSVR2];
1325 local_irq_restore(flags);
1326
1327 return ((status & CyRTS) ? TIOCM_RTS : 0)
1328 | ((status & CyDTR) ? TIOCM_DTR : 0)
1329 | ((status & CyDCD) ? TIOCM_CAR : 0)
1330 | ((status & CyDSR) ? TIOCM_DSR : 0)
1331 | ((status & CyCTS) ? TIOCM_CTS : 0);
1332 } /* cy_tiocmget */
1333
1334 static int
1335 cy_tiocmset(struct tty_struct *tty, struct file *file,
1336 unsigned int set, unsigned int clear)
1337 {
1338 struct cyclades_port *info = tty->driver_data;
1339 int channel;
1340 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1341 unsigned long flags;
1342
1343 channel = info->line;
1344
1345 if (set & TIOCM_RTS) {
1346 local_irq_save(flags);
1347 base_addr[CyCAR] = (u_char) channel;
1348 base_addr[CyMSVR1] = CyRTS;
1349 local_irq_restore(flags);
1350 }
1351 if (set & TIOCM_DTR) {
1352 local_irq_save(flags);
1353 base_addr[CyCAR] = (u_char) channel;
1354 /* CP('S');CP('2'); */
1355 base_addr[CyMSVR2] = CyDTR;
1356 #ifdef SERIAL_DEBUG_DTR
1357 printk("cyc: %d: raising DTR\n", __LINE__);
1358 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1359 base_addr[CyMSVR2]);
1360 #endif
1361 local_irq_restore(flags);
1362 }
1363
1364 if (clear & TIOCM_RTS) {
1365 local_irq_save(flags);
1366 base_addr[CyCAR] = (u_char) channel;
1367 base_addr[CyMSVR1] = 0;
1368 local_irq_restore(flags);
1369 }
1370 if (clear & TIOCM_DTR) {
1371 local_irq_save(flags);
1372 base_addr[CyCAR] = (u_char) channel;
1373 /* CP('C');CP('2'); */
1374 base_addr[CyMSVR2] = 0;
1375 #ifdef SERIAL_DEBUG_DTR
1376 printk("cyc: %d: dropping DTR\n", __LINE__);
1377 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1378 base_addr[CyMSVR2]);
1379 #endif
1380 local_irq_restore(flags);
1381 }
1382
1383 return 0;
1384 } /* set_modem_info */
1385
1386 static void send_break(struct cyclades_port *info, int duration)
1387 { /* Let the transmit ISR take care of this (since it
1388 requires stuffing characters into the output stream).
1389 */
1390 info->x_break = duration;
1391 if (!info->xmit_cnt) {
1392 start_xmit(info);
1393 }
1394 } /* send_break */
1395
1396 static int
1397 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1398 {
1399
1400 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
1401 return -EFAULT;
1402 info->mon.int_count = 0;
1403 info->mon.char_count = 0;
1404 info->mon.char_max = 0;
1405 info->mon.char_last = 0;
1406 return 0;
1407 }
1408
1409 static int set_threshold(struct cyclades_port *info, unsigned long __user * arg)
1410 {
1411 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1412 unsigned long value;
1413 int channel;
1414
1415 if (get_user(value, arg))
1416 return -EFAULT;
1417
1418 channel = info->line;
1419 info->cor4 &= ~CyREC_FIFO;
1420 info->cor4 |= value & CyREC_FIFO;
1421 base_addr[CyCOR4] = info->cor4;
1422 return 0;
1423 }
1424
1425 static int
1426 get_threshold(struct cyclades_port *info, unsigned long __user * value)
1427 {
1428 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1429 int channel;
1430 unsigned long tmp;
1431
1432 channel = info->line;
1433
1434 tmp = base_addr[CyCOR4] & CyREC_FIFO;
1435 return put_user(tmp, value);
1436 }
1437
1438 static int
1439 set_default_threshold(struct cyclades_port *info, unsigned long __user * arg)
1440 {
1441 unsigned long value;
1442
1443 if (get_user(value, arg))
1444 return -EFAULT;
1445
1446 info->default_threshold = value & 0x0f;
1447 return 0;
1448 }
1449
1450 static int
1451 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1452 {
1453 return put_user(info->default_threshold, value);
1454 }
1455
1456 static int set_timeout(struct cyclades_port *info, unsigned long __user * arg)
1457 {
1458 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1459 int channel;
1460 unsigned long value;
1461
1462 if (get_user(value, arg))
1463 return -EFAULT;
1464
1465 channel = info->line;
1466
1467 base_addr[CyRTPRL] = value & 0xff;
1468 base_addr[CyRTPRH] = (value >> 8) & 0xff;
1469 return 0;
1470 }
1471
1472 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1473 {
1474 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1475 int channel;
1476 unsigned long tmp;
1477
1478 channel = info->line;
1479
1480 tmp = base_addr[CyRTPRL];
1481 return put_user(tmp, value);
1482 }
1483
1484 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1485 {
1486 info->default_timeout = value & 0xff;
1487 return 0;
1488 }
1489
1490 static int
1491 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1492 {
1493 return put_user(info->default_timeout, value);
1494 }
1495
1496 static int
1497 cy_ioctl(struct tty_struct *tty, struct file *file,
1498 unsigned int cmd, unsigned long arg)
1499 {
1500 struct cyclades_port *info = tty->driver_data;
1501 int ret_val = 0;
1502 void __user *argp = (void __user *)arg;
1503
1504 #ifdef SERIAL_DEBUG_OTHER
1505 printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */
1506 #endif
1507
1508 tty_lock();
1509
1510 switch (cmd) {
1511 case CYGETMON:
1512 ret_val = get_mon_info(info, argp);
1513 break;
1514 case CYGETTHRESH:
1515 ret_val = get_threshold(info, argp);
1516 break;
1517 case CYSETTHRESH:
1518 ret_val = set_threshold(info, argp);
1519 break;
1520 case CYGETDEFTHRESH:
1521 ret_val = get_default_threshold(info, argp);
1522 break;
1523 case CYSETDEFTHRESH:
1524 ret_val = set_default_threshold(info, argp);
1525 break;
1526 case CYGETTIMEOUT:
1527 ret_val = get_timeout(info, argp);
1528 break;
1529 case CYSETTIMEOUT:
1530 ret_val = set_timeout(info, argp);
1531 break;
1532 case CYGETDEFTIMEOUT:
1533 ret_val = get_default_timeout(info, argp);
1534 break;
1535 case CYSETDEFTIMEOUT:
1536 ret_val = set_default_timeout(info, (unsigned long)arg);
1537 break;
1538 case TCSBRK: /* SVID version: non-zero arg --> no break */
1539 ret_val = tty_check_change(tty);
1540 if (ret_val)
1541 break;
1542 tty_wait_until_sent(tty, 0);
1543 if (!arg)
1544 send_break(info, HZ / 4); /* 1/4 second */
1545 break;
1546 case TCSBRKP: /* support for POSIX tcsendbreak() */
1547 ret_val = tty_check_change(tty);
1548 if (ret_val)
1549 break;
1550 tty_wait_until_sent(tty, 0);
1551 send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1552 break;
1553
1554 /* The following commands are incompletely implemented!!! */
1555 case TIOCGSERIAL:
1556 ret_val = get_serial_info(info, argp);
1557 break;
1558 case TIOCSSERIAL:
1559 ret_val = set_serial_info(info, argp);
1560 break;
1561 default:
1562 ret_val = -ENOIOCTLCMD;
1563 }
1564 tty_unlock();
1565
1566 #ifdef SERIAL_DEBUG_OTHER
1567 printk("cy_ioctl done\n");
1568 #endif
1569
1570 return ret_val;
1571 } /* cy_ioctl */
1572
1573 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1574 {
1575 struct cyclades_port *info = tty->driver_data;
1576
1577 #ifdef SERIAL_DEBUG_OTHER
1578 printk("cy_set_termios %s\n", tty->name);
1579 #endif
1580
1581 if (tty->termios->c_cflag == old_termios->c_cflag)
1582 return;
1583 config_setup(info);
1584
1585 if ((old_termios->c_cflag & CRTSCTS) &&
1586 !(tty->termios->c_cflag & CRTSCTS)) {
1587 tty->stopped = 0;
1588 cy_start(tty);
1589 }
1590 #ifdef tytso_patch_94Nov25_1726
1591 if (!(old_termios->c_cflag & CLOCAL) &&
1592 (tty->termios->c_cflag & CLOCAL))
1593 wake_up_interruptible(&info->open_wait);
1594 #endif
1595 } /* cy_set_termios */
1596
1597 static void cy_close(struct tty_struct *tty, struct file *filp)
1598 {
1599 struct cyclades_port *info = tty->driver_data;
1600
1601 /* CP('C'); */
1602 #ifdef SERIAL_DEBUG_OTHER
1603 printk("cy_close %s\n", tty->name);
1604 #endif
1605
1606 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
1607 return;
1608 }
1609 #ifdef SERIAL_DEBUG_OPEN
1610 printk("cy_close %s, count = %d\n", tty->name, info->count);
1611 #endif
1612
1613 if ((tty->count == 1) && (info->count != 1)) {
1614 /*
1615 * Uh, oh. tty->count is 1, which means that the tty
1616 * structure will be freed. Info->count should always
1617 * be one in these conditions. If it's greater than
1618 * one, we've got real problems, since it means the
1619 * serial port won't be shutdown.
1620 */
1621 printk("cy_close: bad serial port count; tty->count is 1, "
1622 "info->count is %d\n", info->count);
1623 info->count = 1;
1624 }
1625 #ifdef SERIAL_DEBUG_COUNT
1626 printk("cyc: %d: decrementing count to %d\n", __LINE__,
1627 info->count - 1);
1628 #endif
1629 if (--info->count < 0) {
1630 printk("cy_close: bad serial port count for ttys%d: %d\n",
1631 info->line, info->count);
1632 #ifdef SERIAL_DEBUG_COUNT
1633 printk("cyc: %d: setting count to 0\n", __LINE__);
1634 #endif
1635 info->count = 0;
1636 }
1637 if (info->count)
1638 return;
1639 info->flags |= ASYNC_CLOSING;
1640 if (info->flags & ASYNC_INITIALIZED)
1641 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1642 shutdown(info);
1643 cy_flush_buffer(tty);
1644 tty_ldisc_flush(tty);
1645 info->tty = NULL;
1646 if (info->blocked_open) {
1647 if (info->close_delay) {
1648 msleep_interruptible(jiffies_to_msecs
1649 (info->close_delay));
1650 }
1651 wake_up_interruptible(&info->open_wait);
1652 }
1653 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1654 wake_up_interruptible(&info->close_wait);
1655
1656 #ifdef SERIAL_DEBUG_OTHER
1657 printk("cy_close done\n");
1658 #endif
1659 } /* cy_close */
1660
1661 /*
1662 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
1663 */
1664 void cy_hangup(struct tty_struct *tty)
1665 {
1666 struct cyclades_port *info = tty->driver_data;
1667
1668 #ifdef SERIAL_DEBUG_OTHER
1669 printk("cy_hangup %s\n", tty->name); /* */
1670 #endif
1671
1672 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
1673 return;
1674
1675 shutdown(info);
1676 #if 0
1677 info->event = 0;
1678 info->count = 0;
1679 #ifdef SERIAL_DEBUG_COUNT
1680 printk("cyc: %d: setting count to 0\n", __LINE__);
1681 #endif
1682 info->tty = 0;
1683 #endif
1684 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1685 wake_up_interruptible(&info->open_wait);
1686 } /* cy_hangup */
1687
1688 /*
1689 * ------------------------------------------------------------
1690 * cy_open() and friends
1691 * ------------------------------------------------------------
1692 */
1693
1694 static int
1695 block_til_ready(struct tty_struct *tty, struct file *filp,
1696 struct cyclades_port *info)
1697 {
1698 DECLARE_WAITQUEUE(wait, current);
1699 unsigned long flags;
1700 int channel;
1701 int retval;
1702 volatile u_char *base_addr = (u_char *) BASE_ADDR;
1703
1704 /*
1705 * If the device is in the middle of being closed, then block
1706 * until it's done, and then try again.
1707 */
1708 if (info->flags & ASYNC_CLOSING) {
1709 interruptible_sleep_on(&info->close_wait);
1710 if (info->flags & ASYNC_HUP_NOTIFY) {
1711 return -EAGAIN;
1712 } else {
1713 return -ERESTARTSYS;
1714 }
1715 }
1716
1717 /*
1718 * If non-blocking mode is set, then make the check up front
1719 * and then exit.
1720 */
1721 if (filp->f_flags & O_NONBLOCK) {
1722 info->flags |= ASYNC_NORMAL_ACTIVE;
1723 return 0;
1724 }
1725
1726 /*
1727 * Block waiting for the carrier detect and the line to become
1728 * free (i.e., not in use by the callout). While we are in
1729 * this loop, info->count is dropped by one, so that
1730 * cy_close() knows when to free things. We restore it upon
1731 * exit, either normal or abnormal.
1732 */
1733 retval = 0;
1734 add_wait_queue(&info->open_wait, &wait);
1735 #ifdef SERIAL_DEBUG_OPEN
1736 printk("block_til_ready before block: %s, count = %d\n",
1737 tty->name, info->count);
1738 /**/
1739 #endif
1740 info->count--;
1741 #ifdef SERIAL_DEBUG_COUNT
1742 printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count);
1743 #endif
1744 info->blocked_open++;
1745
1746 channel = info->line;
1747
1748 while (1) {
1749 local_irq_save(flags);
1750 base_addr[CyCAR] = (u_char) channel;
1751 base_addr[CyMSVR1] = CyRTS;
1752 /* CP('S');CP('4'); */
1753 base_addr[CyMSVR2] = CyDTR;
1754 #ifdef SERIAL_DEBUG_DTR
1755 printk("cyc: %d: raising DTR\n", __LINE__);
1756 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1757 base_addr[CyMSVR2]);
1758 #endif
1759 local_irq_restore(flags);
1760 set_current_state(TASK_INTERRUPTIBLE);
1761 if (tty_hung_up_p(filp)
1762 || !(info->flags & ASYNC_INITIALIZED)) {
1763 if (info->flags & ASYNC_HUP_NOTIFY) {
1764 retval = -EAGAIN;
1765 } else {
1766 retval = -ERESTARTSYS;
1767 }
1768 break;
1769 }
1770 local_irq_save(flags);
1771 base_addr[CyCAR] = (u_char) channel;
1772 /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */
1773 if (!(info->flags & ASYNC_CLOSING)
1774 && (C_CLOCAL(tty)
1775 || (base_addr[CyMSVR1] & CyDCD))) {
1776 local_irq_restore(flags);
1777 break;
1778 }
1779 local_irq_restore(flags);
1780 if (signal_pending(current)) {
1781 retval = -ERESTARTSYS;
1782 break;
1783 }
1784 #ifdef SERIAL_DEBUG_OPEN
1785 printk("block_til_ready blocking: %s, count = %d\n",
1786 tty->name, info->count);
1787 /**/
1788 #endif
1789 tty_unlock();
1790 schedule();
1791 tty_lock();
1792 }
1793 __set_current_state(TASK_RUNNING);
1794 remove_wait_queue(&info->open_wait, &wait);
1795 if (!tty_hung_up_p(filp)) {
1796 info->count++;
1797 #ifdef SERIAL_DEBUG_COUNT
1798 printk("cyc: %d: incrementing count to %d\n", __LINE__,
1799 info->count);
1800 #endif
1801 }
1802 info->blocked_open--;
1803 #ifdef SERIAL_DEBUG_OPEN
1804 printk("block_til_ready after blocking: %s, count = %d\n",
1805 tty->name, info->count);
1806 /**/
1807 #endif
1808 if (retval)
1809 return retval;
1810 info->flags |= ASYNC_NORMAL_ACTIVE;
1811 return 0;
1812 } /* block_til_ready */
1813
1814 /*
1815 * This routine is called whenever a serial port is opened. It
1816 * performs the serial-specific initialization for the tty structure.
1817 */
1818 int cy_open(struct tty_struct *tty, struct file *filp)
1819 {
1820 struct cyclades_port *info;
1821 int retval, line;
1822
1823 /* CP('O'); */
1824 line = tty->index;
1825 if ((line < 0) || (NR_PORTS <= line)) {
1826 return -ENODEV;
1827 }
1828 info = &cy_port[line];
1829 if (info->line < 0) {
1830 return -ENODEV;
1831 }
1832 #ifdef SERIAL_DEBUG_OTHER
1833 printk("cy_open %s\n", tty->name); /* */
1834 #endif
1835 if (serial_paranoia_check(info, tty->name, "cy_open")) {
1836 return -ENODEV;
1837 }
1838 #ifdef SERIAL_DEBUG_OPEN
1839 printk("cy_open %s, count = %d\n", tty->name, info->count);
1840 /**/
1841 #endif
1842 info->count++;
1843 #ifdef SERIAL_DEBUG_COUNT
1844 printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
1845 #endif
1846 tty->driver_data = info;
1847 info->tty = tty;
1848
1849 /*
1850 * Start up serial port
1851 */
1852 retval = startup(info);
1853 if (retval) {
1854 return retval;
1855 }
1856
1857 retval = block_til_ready(tty, filp, info);
1858 if (retval) {
1859 #ifdef SERIAL_DEBUG_OPEN
1860 printk("cy_open returning after block_til_ready with %d\n",
1861 retval);
1862 #endif
1863 return retval;
1864 }
1865 #ifdef SERIAL_DEBUG_OPEN
1866 printk("cy_open done\n");
1867 /**/
1868 #endif
1869 return 0;
1870 } /* cy_open */
1871
1872 /*
1873 * ---------------------------------------------------------------------
1874 * serial167_init() and friends
1875 *
1876 * serial167_init() is called at boot-time to initialize the serial driver.
1877 * ---------------------------------------------------------------------
1878 */
1879
1880 /*
1881 * This routine prints out the appropriate serial driver version
1882 * number, and identifies which options were configured into this
1883 * driver.
1884 */
1885 static void show_version(void)
1886 {
1887 printk("MVME166/167 cd2401 driver\n");
1888 } /* show_version */
1889
1890 /* initialize chips on card -- return number of valid
1891 chips (which is number of ports/4) */
1892
1893 /*
1894 * This initialises the hardware to a reasonable state. It should
1895 * probe the chip first so as to copy 166-Bug setup as a default for
1896 * port 0. It initialises CMR to CyASYNC; that is never done again, so
1897 * as to limit the number of CyINIT_CHAN commands in normal running.
1898 *
1899 * ... I wonder what I should do if this fails ...
1900 */
1901
1902 void mvme167_serial_console_setup(int cflag)
1903 {
1904 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1905 int ch;
1906 u_char spd;
1907 u_char rcor, rbpr, badspeed = 0;
1908 unsigned long flags;
1909
1910 local_irq_save(flags);
1911
1912 /*
1913 * First probe channel zero of the chip, to see what speed has
1914 * been selected.
1915 */
1916
1917 base_addr[CyCAR] = 0;
1918
1919 rcor = base_addr[CyRCOR] << 5;
1920 rbpr = base_addr[CyRBPR];
1921
1922 for (spd = 0; spd < sizeof(baud_bpr); spd++)
1923 if (rbpr == baud_bpr[spd] && rcor == baud_co[spd])
1924 break;
1925 if (spd >= sizeof(baud_bpr)) {
1926 spd = 14; /* 19200 */
1927 badspeed = 1; /* Failed to identify speed */
1928 }
1929 initial_console_speed = spd;
1930
1931 /* OK, we have chosen a speed, now reset and reinitialise */
1932
1933 my_udelay(20000L); /* Allow time for any active o/p to complete */
1934 if (base_addr[CyCCR] != 0x00) {
1935 local_irq_restore(flags);
1936 /* printk(" chip is never idle (CCR != 0)\n"); */
1937 return;
1938 }
1939
1940 base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */
1941 my_udelay(1000L);
1942
1943 if (base_addr[CyGFRCR] == 0x00) {
1944 local_irq_restore(flags);
1945 /* printk(" chip is not responding (GFRCR stayed 0)\n"); */
1946 return;
1947 }
1948
1949 /*
1950 * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms
1951 * tick
1952 */
1953
1954 base_addr[CyTPR] = 10;
1955
1956 base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */
1957 base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */
1958 base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */
1959
1960 /*
1961 * Attempt to set up all channels to something reasonable, and
1962 * bang out a INIT_CHAN command. We should then be able to limit
1963 * the amount of fiddling we have to do in normal running.
1964 */
1965
1966 for (ch = 3; ch >= 0; ch--) {
1967 base_addr[CyCAR] = (u_char) ch;
1968 base_addr[CyIER] = 0;
1969 base_addr[CyCMR] = CyASYNC;
1970 base_addr[CyLICR] = (u_char) ch << 2;
1971 base_addr[CyLIVR] = 0x5c;
1972 base_addr[CyTCOR] = baud_co[spd];
1973 base_addr[CyTBPR] = baud_bpr[spd];
1974 base_addr[CyRCOR] = baud_co[spd] >> 5;
1975 base_addr[CyRBPR] = baud_bpr[spd];
1976 base_addr[CySCHR1] = 'Q' & 0x1f;
1977 base_addr[CySCHR2] = 'X' & 0x1f;
1978 base_addr[CySCRL] = 0;
1979 base_addr[CySCRH] = 0;
1980 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
1981 base_addr[CyCOR2] = 0;
1982 base_addr[CyCOR3] = Cy_1_STOP;
1983 base_addr[CyCOR4] = baud_cor4[spd];
1984 base_addr[CyCOR5] = 0;
1985 base_addr[CyCOR6] = 0;
1986 base_addr[CyCOR7] = 0;
1987 base_addr[CyRTPRL] = 2;
1988 base_addr[CyRTPRH] = 0;
1989 base_addr[CyMSVR1] = 0;
1990 base_addr[CyMSVR2] = 0;
1991 write_cy_cmd(base_addr, CyINIT_CHAN | CyDIS_RCVR | CyDIS_XMTR);
1992 }
1993
1994 /*
1995 * Now do specials for channel zero....
1996 */
1997
1998 base_addr[CyMSVR1] = CyRTS;
1999 base_addr[CyMSVR2] = CyDTR;
2000 base_addr[CyIER] = CyRxData;
2001 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
2002
2003 local_irq_restore(flags);
2004
2005 my_udelay(20000L); /* Let it all settle down */
2006
2007 printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]);
2008 if (badspeed)
2009 printk
2010 (" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n",
2011 rcor >> 5, rbpr);
2012 } /* serial_console_init */
2013
2014 static const struct tty_operations cy_ops = {
2015 .open = cy_open,
2016 .close = cy_close,
2017 .write = cy_write,
2018 .put_char = cy_put_char,
2019 .flush_chars = cy_flush_chars,
2020 .write_room = cy_write_room,
2021 .chars_in_buffer = cy_chars_in_buffer,
2022 .flush_buffer = cy_flush_buffer,
2023 .ioctl = cy_ioctl,
2024 .throttle = cy_throttle,
2025 .unthrottle = cy_unthrottle,
2026 .set_termios = cy_set_termios,
2027 .stop = cy_stop,
2028 .start = cy_start,
2029 .hangup = cy_hangup,
2030 .tiocmget = cy_tiocmget,
2031 .tiocmset = cy_tiocmset,
2032 };
2033
2034 /* The serial driver boot-time initialization code!
2035 Hardware I/O ports are mapped to character special devices on a
2036 first found, first allocated manner. That is, this code searches
2037 for Cyclom cards in the system. As each is found, it is probed
2038 to discover how many chips (and thus how many ports) are present.
2039 These ports are mapped to the tty ports 64 and upward in monotonic
2040 fashion. If an 8-port card is replaced with a 16-port card, the
2041 port mapping on a following card will shift.
2042
2043 This approach is different from what is used in the other serial
2044 device driver because the Cyclom is more properly a multiplexer,
2045 not just an aggregation of serial ports on one card.
2046
2047 If there are more cards with more ports than have been statically
2048 allocated above, a warning is printed and the extra ports are ignored.
2049 */
2050 static int __init serial167_init(void)
2051 {
2052 struct cyclades_port *info;
2053 int ret = 0;
2054 int good_ports = 0;
2055 int port_num = 0;
2056 int index;
2057 int DefSpeed;
2058 #ifdef notyet
2059 struct sigaction sa;
2060 #endif
2061
2062 if (!(mvme16x_config & MVME16x_CONFIG_GOT_CD2401))
2063 return 0;
2064
2065 cy_serial_driver = alloc_tty_driver(NR_PORTS);
2066 if (!cy_serial_driver)
2067 return -ENOMEM;
2068
2069 #if 0
2070 scrn[1] = '\0';
2071 #endif
2072
2073 show_version();
2074
2075 /* Has "console=0,9600n8" been used in bootinfo to change speed? */
2076 if (serial_console_cflag)
2077 DefSpeed = serial_console_cflag & 0017;
2078 else {
2079 DefSpeed = initial_console_speed;
2080 serial_console_info = &cy_port[0];
2081 serial_console_cflag = DefSpeed | CS8;
2082 #if 0
2083 serial_console = 64; /*callout_driver.minor_start */
2084 #endif
2085 }
2086
2087 /* Initialize the tty_driver structure */
2088
2089 cy_serial_driver->owner = THIS_MODULE;
2090 cy_serial_driver->name = "ttyS";
2091 cy_serial_driver->major = TTY_MAJOR;
2092 cy_serial_driver->minor_start = 64;
2093 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2094 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
2095 cy_serial_driver->init_termios = tty_std_termios;
2096 cy_serial_driver->init_termios.c_cflag =
2097 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2098 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
2099 tty_set_operations(cy_serial_driver, &cy_ops);
2100
2101 ret = tty_register_driver(cy_serial_driver);
2102 if (ret) {
2103 printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n");
2104 put_tty_driver(cy_serial_driver);
2105 return ret;
2106 }
2107
2108 port_num = 0;
2109 info = cy_port;
2110 for (index = 0; index < 1; index++) {
2111
2112 good_ports = 4;
2113
2114 if (port_num < NR_PORTS) {
2115 while (good_ports-- && port_num < NR_PORTS) {
2116 /*** initialize port ***/
2117 info->magic = CYCLADES_MAGIC;
2118 info->type = PORT_CIRRUS;
2119 info->card = index;
2120 info->line = port_num;
2121 info->flags = STD_COM_FLAGS;
2122 info->tty = NULL;
2123 info->xmit_fifo_size = 12;
2124 info->cor1 = CyPARITY_NONE | Cy_8_BITS;
2125 info->cor2 = CyETC;
2126 info->cor3 = Cy_1_STOP;
2127 info->cor4 = 0x08; /* _very_ small receive threshold */
2128 info->cor5 = 0;
2129 info->cor6 = 0;
2130 info->cor7 = 0;
2131 info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */
2132 info->tco = baud_co[DefSpeed]; /* Tx CO */
2133 info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */
2134 info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */
2135 info->close_delay = 0;
2136 info->x_char = 0;
2137 info->count = 0;
2138 #ifdef SERIAL_DEBUG_COUNT
2139 printk("cyc: %d: setting count to 0\n",
2140 __LINE__);
2141 #endif
2142 info->blocked_open = 0;
2143 info->default_threshold = 0;
2144 info->default_timeout = 0;
2145 init_waitqueue_head(&info->open_wait);
2146 init_waitqueue_head(&info->close_wait);
2147 /* info->session */
2148 /* info->pgrp */
2149 /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/
2150 info->read_status_mask =
2151 CyTIMEOUT | CySPECHAR | CyBREAK | CyPARITY |
2152 CyFRAME | CyOVERRUN;
2153 /* info->timeout */
2154
2155 printk("ttyS%d ", info->line);
2156 port_num++;
2157 info++;
2158 if (!(port_num & 7)) {
2159 printk("\n ");
2160 }
2161 }
2162 }
2163 printk("\n");
2164 }
2165 while (port_num < NR_PORTS) {
2166 info->line = -1;
2167 port_num++;
2168 info++;
2169 }
2170
2171 ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
2172 "cd2401_errors", cd2401_rxerr_interrupt);
2173 if (ret) {
2174 printk(KERN_ERR "Could't get cd2401_errors IRQ");
2175 goto cleanup_serial_driver;
2176 }
2177
2178 ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
2179 "cd2401_modem", cd2401_modem_interrupt);
2180 if (ret) {
2181 printk(KERN_ERR "Could't get cd2401_modem IRQ");
2182 goto cleanup_irq_cd2401_errors;
2183 }
2184
2185 ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
2186 "cd2401_txints", cd2401_tx_interrupt);
2187 if (ret) {
2188 printk(KERN_ERR "Could't get cd2401_txints IRQ");
2189 goto cleanup_irq_cd2401_modem;
2190 }
2191
2192 ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
2193 "cd2401_rxints", cd2401_rx_interrupt);
2194 if (ret) {
2195 printk(KERN_ERR "Could't get cd2401_rxints IRQ");
2196 goto cleanup_irq_cd2401_txints;
2197 }
2198
2199 /* Now we have registered the interrupt handlers, allow the interrupts */
2200
2201 pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */
2202 pcc2chip[PccSCCTICR] = 0x15;
2203 pcc2chip[PccSCCRICR] = 0x15;
2204
2205 pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */
2206
2207 return 0;
2208 cleanup_irq_cd2401_txints:
2209 free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt);
2210 cleanup_irq_cd2401_modem:
2211 free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt);
2212 cleanup_irq_cd2401_errors:
2213 free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt);
2214 cleanup_serial_driver:
2215 if (tty_unregister_driver(cy_serial_driver))
2216 printk(KERN_ERR
2217 "Couldn't unregister MVME166/7 serial driver\n");
2218 put_tty_driver(cy_serial_driver);
2219 return ret;
2220 } /* serial167_init */
2221
2222 module_init(serial167_init);
2223
2224 #ifdef CYCLOM_SHOW_STATUS
2225 static void show_status(int line_num)
2226 {
2227 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2228 int channel;
2229 struct cyclades_port *info;
2230 unsigned long flags;
2231
2232 info = &cy_port[line_num];
2233 channel = info->line;
2234 printk(" channel %d\n", channel);
2235 /**/ printk(" cy_port\n");
2236 printk(" card line flags = %d %d %x\n",
2237 info->card, info->line, info->flags);
2238 printk
2239 (" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n",
2240 (long)info->tty, info->read_status_mask, info->timeout,
2241 info->xmit_fifo_size);
2242 printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n",
2243 info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
2244 info->cor6, info->cor7);
2245 printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", info->tbpr, info->tco,
2246 info->rbpr, info->rco);
2247 printk(" close_delay event count = %d %d %d\n", info->close_delay,
2248 info->event, info->count);
2249 printk(" x_char blocked_open = %x %x\n", info->x_char,
2250 info->blocked_open);
2251 printk(" open_wait = %lx %lx %lx\n", (long)info->open_wait);
2252
2253 local_irq_save(flags);
2254
2255 /* Global Registers */
2256
2257 printk(" CyGFRCR %x\n", base_addr[CyGFRCR]);
2258 printk(" CyCAR %x\n", base_addr[CyCAR]);
2259 printk(" CyRISR %x\n", base_addr[CyRISR]);
2260 printk(" CyTISR %x\n", base_addr[CyTISR]);
2261 printk(" CyMISR %x\n", base_addr[CyMISR]);
2262 printk(" CyRIR %x\n", base_addr[CyRIR]);
2263 printk(" CyTIR %x\n", base_addr[CyTIR]);
2264 printk(" CyMIR %x\n", base_addr[CyMIR]);
2265 printk(" CyTPR %x\n", base_addr[CyTPR]);
2266
2267 base_addr[CyCAR] = (u_char) channel;
2268
2269 /* Virtual Registers */
2270
2271 #if 0
2272 printk(" CyRIVR %x\n", base_addr[CyRIVR]);
2273 printk(" CyTIVR %x\n", base_addr[CyTIVR]);
2274 printk(" CyMIVR %x\n", base_addr[CyMIVR]);
2275 printk(" CyMISR %x\n", base_addr[CyMISR]);
2276 #endif
2277
2278 /* Channel Registers */
2279
2280 printk(" CyCCR %x\n", base_addr[CyCCR]);
2281 printk(" CyIER %x\n", base_addr[CyIER]);
2282 printk(" CyCOR1 %x\n", base_addr[CyCOR1]);
2283 printk(" CyCOR2 %x\n", base_addr[CyCOR2]);
2284 printk(" CyCOR3 %x\n", base_addr[CyCOR3]);
2285 printk(" CyCOR4 %x\n", base_addr[CyCOR4]);
2286 printk(" CyCOR5 %x\n", base_addr[CyCOR5]);
2287 #if 0
2288 printk(" CyCCSR %x\n", base_addr[CyCCSR]);
2289 printk(" CyRDCR %x\n", base_addr[CyRDCR]);
2290 #endif
2291 printk(" CySCHR1 %x\n", base_addr[CySCHR1]);
2292 printk(" CySCHR2 %x\n", base_addr[CySCHR2]);
2293 #if 0
2294 printk(" CySCHR3 %x\n", base_addr[CySCHR3]);
2295 printk(" CySCHR4 %x\n", base_addr[CySCHR4]);
2296 printk(" CySCRL %x\n", base_addr[CySCRL]);
2297 printk(" CySCRH %x\n", base_addr[CySCRH]);
2298 printk(" CyLNC %x\n", base_addr[CyLNC]);
2299 printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]);
2300 printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]);
2301 #endif
2302 printk(" CyRTPRL %x\n", base_addr[CyRTPRL]);
2303 printk(" CyRTPRH %x\n", base_addr[CyRTPRH]);
2304 printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]);
2305 printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]);
2306 printk(" CyRBPR %x\n", base_addr[CyRBPR]);
2307 printk(" CyRCOR %x\n", base_addr[CyRCOR]);
2308 printk(" CyTBPR %x\n", base_addr[CyTBPR]);
2309 printk(" CyTCOR %x\n", base_addr[CyTCOR]);
2310
2311 local_irq_restore(flags);
2312 } /* show_status */
2313 #endif
2314
2315 #if 0
2316 /* Dummy routine in mvme16x/config.c for now */
2317
2318 /* Serial console setup. Called from linux/init/main.c */
2319
2320 void console_setup(char *str, int *ints)
2321 {
2322 char *s;
2323 int baud, bits, parity;
2324 int cflag = 0;
2325
2326 /* Sanity check. */
2327 if (ints[0] > 3 || ints[1] > 3)
2328 return;
2329
2330 /* Get baud, bits and parity */
2331 baud = 2400;
2332 bits = 8;
2333 parity = 'n';
2334 if (ints[2])
2335 baud = ints[2];
2336 if ((s = strchr(str, ','))) {
2337 do {
2338 s++;
2339 } while (*s >= '0' && *s <= '9');
2340 if (*s)
2341 parity = *s++;
2342 if (*s)
2343 bits = *s - '0';
2344 }
2345
2346 /* Now construct a cflag setting. */
2347 switch (baud) {
2348 case 1200:
2349 cflag |= B1200;
2350 break;
2351 case 9600:
2352 cflag |= B9600;
2353 break;
2354 case 19200:
2355 cflag |= B19200;
2356 break;
2357 case 38400:
2358 cflag |= B38400;
2359 break;
2360 case 2400:
2361 default:
2362 cflag |= B2400;
2363 break;
2364 }
2365 switch (bits) {
2366 case 7:
2367 cflag |= CS7;
2368 break;
2369 default:
2370 case 8:
2371 cflag |= CS8;
2372 break;
2373 }
2374 switch (parity) {
2375 case 'o':
2376 case 'O':
2377 cflag |= PARODD;
2378 break;
2379 case 'e':
2380 case 'E':
2381 cflag |= PARENB;
2382 break;
2383 }
2384
2385 serial_console_info = &cy_port[ints[1]];
2386 serial_console_cflag = cflag;
2387 serial_console = ints[1] + 64; /*callout_driver.minor_start */
2388 }
2389 #endif
2390
2391 /*
2392 * The following is probably out of date for 2.1.x serial console stuff.
2393 *
2394 * The console is registered early on from arch/m68k/kernel/setup.c, and
2395 * it therefore relies on the chip being setup correctly by 166-Bug. This
2396 * seems reasonable, as the serial port has been used to invoke the system
2397 * boot. It also means that this function must not rely on any data
2398 * initialisation performed by serial167_init() etc.
2399 *
2400 * Of course, once the console has been registered, we had better ensure
2401 * that serial167_init() doesn't leave the chip non-functional.
2402 *
2403 * The console must be locked when we get here.
2404 */
2405
2406 void serial167_console_write(struct console *co, const char *str,
2407 unsigned count)
2408 {
2409 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2410 unsigned long flags;
2411 volatile u_char sink;
2412 u_char ier;
2413 int port;
2414 u_char do_lf = 0;
2415 int i = 0;
2416
2417 local_irq_save(flags);
2418
2419 /* Ensure transmitter is enabled! */
2420
2421 port = 0;
2422 base_addr[CyCAR] = (u_char) port;
2423 while (base_addr[CyCCR])
2424 ;
2425 base_addr[CyCCR] = CyENB_XMTR;
2426
2427 ier = base_addr[CyIER];
2428 base_addr[CyIER] = CyTxMpty;
2429
2430 while (1) {
2431 if (pcc2chip[PccSCCTICR] & 0x20) {
2432 /* We have a Tx int. Acknowledge it */
2433 sink = pcc2chip[PccTPIACKR];
2434 if ((base_addr[CyLICR] >> 2) == port) {
2435 if (i == count) {
2436 /* Last char of string is now output */
2437 base_addr[CyTEOIR] = CyNOTRANS;
2438 break;
2439 }
2440 if (do_lf) {
2441 base_addr[CyTDR] = '\n';
2442 str++;
2443 i++;
2444 do_lf = 0;
2445 } else if (*str == '\n') {
2446 base_addr[CyTDR] = '\r';
2447 do_lf = 1;
2448 } else {
2449 base_addr[CyTDR] = *str++;
2450 i++;
2451 }
2452 base_addr[CyTEOIR] = 0;
2453 } else
2454 base_addr[CyTEOIR] = CyNOTRANS;
2455 }
2456 }
2457
2458 base_addr[CyIER] = ier;
2459
2460 local_irq_restore(flags);
2461 }
2462
2463 static struct tty_driver *serial167_console_device(struct console *c,
2464 int *index)
2465 {
2466 *index = c->index;
2467 return cy_serial_driver;
2468 }
2469
2470 static struct console sercons = {
2471 .name = "ttyS",
2472 .write = serial167_console_write,
2473 .device = serial167_console_device,
2474 .flags = CON_PRINTBUFFER,
2475 .index = -1,
2476 };
2477
2478 static int __init serial167_console_init(void)
2479 {
2480 if (vme_brdtype == VME_TYPE_MVME166 ||
2481 vme_brdtype == VME_TYPE_MVME167 ||
2482 vme_brdtype == VME_TYPE_MVME177) {
2483 mvme167_serial_console_setup(0);
2484 register_console(&sercons);
2485 }
2486 return 0;
2487 }
2488
2489 console_initcall(serial167_console_init);
2490
2491 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree