?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] libata handle the case when device returns/needs extra data
[linux-2.6/kvm.git] / drivers / sbus / char / aurora.c
blobd96cc47de5668e203cbb49a4d77c85c2d72c1485
1 /* $Id: aurora.c,v 1.19 2002/01/08 16:00:16 davem Exp $
2 * linux/drivers/sbus/char/aurora.c -- Aurora multiport driver
3 *
4 * Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro)
5 *
6 * This code is based on the RISCom/8 multiport serial driver written
7 * by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial
8 * driver, written by Linus Torvalds, Theodore T'so and others.
9 * The Aurora multiport programming info was obtained mainly from the
10 * Cirrus Logic CD180 documentation (available on the web), and by
11 * doing heavy tests on the board. Many thanks to Eddie C. Dost for the
12 * help on the sbus interface.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 * Revision 1.0
29 *
30 * This is the first public release.
31 *
32 * Most of the information you need is in the aurora.h file. Please
33 * read that file before reading this one.
34 *
35 * Several parts of the code do not have comments yet.
36 *
37 * n.b. The board can support 115.2 bit rates, but only on a few
38 * ports. The total badwidth of one chip (ports 0-7 or 8-15) is equal
39 * to OSC_FREQ div 16. In case of my board, each chip can take 6
40 * channels of 115.2 kbaud. This information is not well-tested.
41 *
42 * Fixed to use tty_get_baud_rate().
43 * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
44 */
45
46 #include <linux/module.h>
47
48 #include <linux/errno.h>
49 #include <linux/sched.h>
50 #ifdef AURORA_INT_DEBUG
51 #include <linux/timer.h>
52 #endif
53 #include <linux/interrupt.h>
54 #include <linux/tty.h>
55 #include <linux/tty_flip.h>
56 #include <linux/major.h>
57 #include <linux/string.h>
58 #include <linux/fcntl.h>
59 #include <linux/mm.h>
60 #include <linux/kernel.h>
61 #include <linux/init.h>
62 #include <linux/delay.h>
63 #include <linux/bitops.h>
64
65 #include <asm/io.h>
66 #include <asm/irq.h>
67 #include <asm/oplib.h>
68 #include <asm/system.h>
69 #include <asm/kdebug.h>
70 #include <asm/sbus.h>
71 #include <asm/uaccess.h>
72
73 #include "aurora.h"
74 #include "cd180.h"
75
76 unsigned char irqs[4] = {
77 0, 0, 0, 0
78 };
79
80 #ifdef AURORA_INT_DEBUG
81 int irqhit=0;
82 #endif
83
84 static struct tty_driver *aurora_driver;
85 static struct Aurora_board aurora_board[AURORA_NBOARD] = {
86 {0,},
87 };
88
89 static struct Aurora_port aurora_port[AURORA_TNPORTS] = {
90 { 0, },
91 };
92
93 /* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/
94 static unsigned char * tmp_buf = NULL;
95 static DECLARE_MUTEX(tmp_buf_sem);
96
97 DECLARE_TASK_QUEUE(tq_aurora);
98
99 static inline int aurora_paranoia_check(struct Aurora_port const * port,
100 char *name, const char *routine)
101 {
102 #ifdef AURORA_PARANOIA_CHECK
103 static const char *badmagic =
104 KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
105 static const char *badinfo =
106 KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
107
108 if (!port) {
109 printk(badinfo, name, routine);
110 return 1;
111 }
112 if (port->magic != AURORA_MAGIC) {
113 printk(badmagic, name, routine);
114 return 1;
115 }
116 #endif
117 return 0;
118 }
119
120 /*
121 *
122 * Service functions for aurora driver.
123 *
124 */
125
126 /* Get board number from pointer */
127 extern inline int board_No (struct Aurora_board const * bp)
128 {
129 return bp - aurora_board;
130 }
131
132 /* Get port number from pointer */
133 extern inline int port_No (struct Aurora_port const * port)
134 {
135 return AURORA_PORT(port - aurora_port);
136 }
137
138 /* Get pointer to board from pointer to port */
139 extern inline struct Aurora_board * port_Board(struct Aurora_port const * port)
140 {
141 return &aurora_board[AURORA_BOARD(port - aurora_port)];
142 }
143
144 /* Wait for Channel Command Register ready */
145 extern inline void aurora_wait_CCR(struct aurora_reg128 * r)
146 {
147 unsigned long delay;
148
149 #ifdef AURORA_DEBUG
150 printk("aurora_wait_CCR\n");
151 #endif
152 /* FIXME: need something more descriptive than 100000 :) */
153 for (delay = 100000; delay; delay--)
154 if (!sbus_readb(&r->r[CD180_CCR]))
155 return;
156 printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
157 }
158
159 /*
160 * aurora probe functions.
161 */
162
163 /* Must be called with enabled interrupts */
164 extern inline void aurora_long_delay(unsigned long delay)
165 {
166 unsigned long i;
167
168 #ifdef AURORA_DEBUG
169 printk("aurora_long_delay: start\n");
170 #endif
171 for (i = jiffies + delay; time_before(jiffies, i); ) ;
172 #ifdef AURORA_DEBUG
173 printk("aurora_long_delay: end\n");
174 #endif
175 }
176
177 /* Reset and setup CD180 chip */
178 static int aurora_init_CD180(struct Aurora_board * bp, int chip)
179 {
180 unsigned long flags;
181 int id;
182
183 #ifdef AURORA_DEBUG
184 printk("aurora_init_CD180: start %d:%d\n",
185 board_No(bp), chip);
186 #endif
187 save_flags(flags); cli();
188 sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
189 sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
190
191 /* Wait for CCR ready */
192 aurora_wait_CCR(bp->r[chip]);
193
194 /* Reset CD180 chip */
195 sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
196 udelay(1);
197 sti();
198 id=1000;
199 while((--id) &&
200 (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
201 if(!id) {
202 printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
203 board_No(bp), chip);
204 restore_flags(flags);
205 return(-1);
206 }
207 cli();
208 sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
209 &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip */
210 sbus_writeb(0x80|bp->ACK_MINT,
211 &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr */
212 sbus_writeb(0x80|bp->ACK_TINT,
213 &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
214 sbus_writeb(0x80|bp->ACK_RINT,
215 &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr */
216 /* Setting up prescaler. We need 4 tick per 1 ms */
217 sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
218 &bp->r[chip]->r[CD180_PPRH]);
219 sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
220 &bp->r[chip]->r[CD180_PPRL]);
221
222 sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
223 &bp->r[chip]->r[CD180_SRCR]);
224
225 id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
226 printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
227 board_No(bp), chip,id);
228 if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
229 switch (id) {
230 case 0x82:printk("CL-CD1864 rev A\n");break;
231 case 0x83:printk("CL-CD1865 rev A\n");break;
232 case 0x84:printk("CL-CD1865 rev B\n");break;
233 case 0x85:printk("CL-CD1865 rev C\n");break;
234 default:printk("Unknown.\n");
235 };
236 } else {
237 switch (id) {
238 case 0x81:printk("CL-CD180 rev B\n");break;
239 case 0x82:printk("CL-CD180 rev C\n");break;
240 default:printk("Unknown.\n");
241 };
242 }
243 restore_flags(flags);
244 #ifdef AURORA_DEBUG
245 printk("aurora_init_CD180: end\n");
246 #endif
247 return 0;
248 }
249
250 static int valid_irq(unsigned char irq)
251 {
252 int i;
253 for(i=0;i<TYPE_1_IRQS;i++)
254 if (type_1_irq[i]==irq) return 1;
255 return 0;
256 }
257
258 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs);
259
260 /* Main probing routine, also sets irq. */
261 static int aurora_probe(void)
262 {
263 struct sbus_bus *sbus;
264 struct sbus_dev *sdev;
265 int grrr;
266 char buf[30];
267 int bn = 0;
268 struct Aurora_board *bp;
269
270 for_each_sbus(sbus) {
271 for_each_sbusdev(sdev, sbus) {
272 /* printk("Try: %x %s\n",sdev,sdev->prom_name);*/
273 if (!strcmp(sdev->prom_name, "sio16")) {
274 #ifdef AURORA_DEBUG
275 printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
276 #endif
277 if((sdev->reg_addrs[0].reg_size!=1) &&
278 (sdev->reg_addrs[1].reg_size!=128) &&
279 (sdev->reg_addrs[2].reg_size!=128) &&
280 (sdev->reg_addrs[3].reg_size!=4)) {
281 printk(KERN_ERR "aurora%d: registers' sizes "
282 "do not match.\n", bn);
283 break;
284 }
285 bp = &aurora_board[bn];
286 bp->r0 = (struct aurora_reg1 *)
287 sbus_ioremap(&sdev->resource[0], 0,
288 sdev->reg_addrs[0].reg_size,
289 "sio16");
290 if (bp->r0 == NULL) {
291 printk(KERN_ERR "aurora%d: can't map "
292 "reg_addrs[0]\n", bn);
293 break;
294 }
295 #ifdef AURORA_DEBUG
296 printk("Map reg 0: %p\n", bp->r0);
297 #endif
298 bp->r[0] = (struct aurora_reg128 *)
299 sbus_ioremap(&sdev->resource[1], 0,
300 sdev->reg_addrs[1].reg_size,
301 "sio16");
302 if (bp->r[0] == NULL) {
303 printk(KERN_ERR "aurora%d: can't map "
304 "reg_addrs[1]\n", bn);
305 break;
306 }
307 #ifdef AURORA_DEBUG
308 printk("Map reg 1: %p\n", bp->r[0]);
309 #endif
310 bp->r[1] = (struct aurora_reg128 *)
311 sbus_ioremap(&sdev->resource[2], 0,
312 sdev->reg_addrs[2].reg_size,
313 "sio16");
314 if (bp->r[1] == NULL) {
315 printk(KERN_ERR "aurora%d: can't map "
316 "reg_addrs[2]\n", bn);
317 break;
318 }
319 #ifdef AURORA_DEBUG
320 printk("Map reg 2: %p\n", bp->r[1]);
321 #endif
322 bp->r3 = (struct aurora_reg4 *)
323 sbus_ioremap(&sdev->resource[3], 0,
324 sdev->reg_addrs[3].reg_size,
325 "sio16");
326 if (bp->r3 == NULL) {
327 printk(KERN_ERR "aurora%d: can't map "
328 "reg_addrs[3]\n", bn);
329 break;
330 }
331 #ifdef AURORA_DEBUG
332 printk("Map reg 3: %p\n", bp->r3);
333 #endif
334 /* Variables setup */
335 bp->flags = 0;
336 #ifdef AURORA_DEBUG
337 grrr=prom_getint(sdev->prom_node,"intr");
338 printk("intr pri %d\n", grrr);
339 #endif
340 if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
341 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
342 free_irq(bp->irq|0x30, bp);
343 } else
344 if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
345 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
346 free_irq(bp->irq|0x30, bp);
347 } else
348 if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
349 !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
350 free_irq(bp->irq|0x30, bp);
351 } else
352 for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
353 if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
354 free_irq(bp->irq|0x30, bp);
355 break;
356 } else {
357 printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
358 bp->flags=0xff;
359 }
360 }
361 if(bp->flags==0xff)break;
362 printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
363 buf[0]=0;
364 grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
365 if(!strcmp(buf,"swapped")){
366 printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
367 bp->DTR=MSVR_RTS;
368 bp->RTS=MSVR_DTR;
369 bp->MSVDTR=CD180_MSVRTS;
370 bp->MSVRTS=CD180_MSVDTR;
371 bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
372 }else{
373 #ifdef AURORA_FORCE_DTR_FLOW
374 printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
375 bp->DTR=MSVR_RTS;
376 bp->RTS=MSVR_DTR;
377 bp->MSVDTR=CD180_MSVRTS;
378 bp->MSVRTS=CD180_MSVDTR;
379 bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
380 #else
381 printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
382 bp->DTR=MSVR_DTR;
383 bp->RTS=MSVR_RTS;
384 bp->MSVDTR=CD180_MSVDTR;
385 bp->MSVRTS=CD180_MSVRTS;
386 #endif
387 }
388 bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
389 printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
390 grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
391 printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
392 grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
393 printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
394 grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
395 printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
396 grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
397 printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
398 grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
399 printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
400 #ifdef MODULE
401 bp->count=0;
402 #endif
403 bp->flags = AURORA_BOARD_PRESENT;
404 /* hardware ack */
405 bp->ACK_MINT=1;
406 bp->ACK_TINT=2;
407 bp->ACK_RINT=3;
408 bn++;
409 }
410 }
411 }
412 return bn;
413 }
414
415 static void aurora_release_io_range(struct Aurora_board *bp)
416 {
417 sbus_iounmap((unsigned long)bp->r0, 1);
418 sbus_iounmap((unsigned long)bp->r[0], 128);
419 sbus_iounmap((unsigned long)bp->r[1], 128);
420 sbus_iounmap((unsigned long)bp->r3, 4);
421 }
422
423 extern inline void aurora_mark_event(struct Aurora_port * port, int event)
424 {
425 #ifdef AURORA_DEBUG
426 printk("aurora_mark_event: start\n");
427 #endif
428 set_bit(event, &port->event);
429 queue_task(&port->tqueue, &tq_aurora);
430 mark_bh(AURORA_BH);
431 #ifdef AURORA_DEBUG
432 printk("aurora_mark_event: end\n");
433 #endif
434 }
435
436 static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
437 int chip,
438 unsigned char const *what)
439 {
440 unsigned char channel;
441 struct Aurora_port * port;
442
443 channel = ((chip << 3) |
444 ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
445 port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
446 if (port->flags & ASYNC_INITIALIZED)
447 return port;
448
449 printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
450 board_No(bp), what, channel);
451 return NULL;
452 }
453
454 static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
455 {
456 struct Aurora_port *port;
457 struct tty_struct *tty;
458 unsigned char status;
459 unsigned char ch;
460
461 if (!(port = aurora_get_port(bp, chip, "Receive_x")))
462 return;
463
464 tty = port->tty;
465 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
466 #ifdef AURORA_INTNORM
467 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
468 board_No(bp), port_No(port));
469 #endif
470 return;
471 }
472
473 #ifdef AURORA_REPORT_OVERRUN
474 status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
475 if (status & RCSR_OE) {
476 port->overrun++;
477 #if 1
478 printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
479 board_No(bp), port_No(port), port->overrun);
480 #endif
481 }
482 status &= port->mark_mask;
483 #else
484 status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
485 #endif
486 ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
487 if (!status)
488 return;
489
490 if (status & RCSR_TOUT) {
491 /* printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
492 board_No(bp), port_No(port));*/
493 return;
494
495 } else if (status & RCSR_BREAK) {
496 printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
497 board_No(bp), port_No(port));
498 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
499 if (port->flags & ASYNC_SAK)
500 do_SAK(tty);
501
502 } else if (status & RCSR_PE)
503 *tty->flip.flag_buf_ptr++ = TTY_PARITY;
504
505 else if (status & RCSR_FE)
506 *tty->flip.flag_buf_ptr++ = TTY_FRAME;
507
508 else if (status & RCSR_OE)
509 *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
510
511 else
512 *tty->flip.flag_buf_ptr++ = 0;
513
514 *tty->flip.char_buf_ptr++ = ch;
515 tty->flip.count++;
516 queue_task(&tty->flip.tqueue, &tq_timer);
517 }
518
519 static void aurora_receive(struct Aurora_board const * bp, int chip)
520 {
521 struct Aurora_port *port;
522 struct tty_struct *tty;
523 unsigned char count,cnt;
524
525 if (!(port = aurora_get_port(bp, chip, "Receive")))
526 return;
527
528 tty = port->tty;
529
530 count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
531
532 #ifdef AURORA_REPORT_FIFO
533 port->hits[count > 8 ? 9 : count]++;
534 #endif
535
536 while (count--) {
537 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
538 #ifdef AURORA_INTNORM
539 printk("aurora%d: port %d: Working around flip buffer overflow.\n",
540 board_No(bp), port_No(port));
541 #endif
542 break;
543 }
544 cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
545 *tty->flip.char_buf_ptr++ = cnt;
546 *tty->flip.flag_buf_ptr++ = 0;
547 tty->flip.count++;
548 }
549 queue_task(&tty->flip.tqueue, &tq_timer);
550 }
551
552 static void aurora_transmit(struct Aurora_board const * bp, int chip)
553 {
554 struct Aurora_port *port;
555 struct tty_struct *tty;
556 unsigned char count;
557
558 if (!(port = aurora_get_port(bp, chip, "Transmit")))
559 return;
560
561 tty = port->tty;
562
563 if (port->SRER & SRER_TXEMPTY) {
564 /* FIFO drained */
565 sbus_writeb(port_No(port) & 7,
566 &bp->r[chip]->r[CD180_CAR]);
567 udelay(1);
568 port->SRER &= ~SRER_TXEMPTY;
569 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
570 return;
571 }
572
573 if ((port->xmit_cnt <= 0 && !port->break_length)
574 || tty->stopped || tty->hw_stopped) {
575 sbus_writeb(port_No(port) & 7,
576 &bp->r[chip]->r[CD180_CAR]);
577 udelay(1);
578 port->SRER &= ~SRER_TXRDY;
579 sbus_writeb(port->SRER,
580 &bp->r[chip]->r[CD180_SRER]);
581 return;
582 }
583
584 if (port->break_length) {
585 if (port->break_length > 0) {
586 if (port->COR2 & COR2_ETC) {
587 sbus_writeb(CD180_C_ESC,
588 &bp->r[chip]->r[CD180_TDR]);
589 sbus_writeb(CD180_C_SBRK,
590 &bp->r[chip]->r[CD180_TDR]);
591 port->COR2 &= ~COR2_ETC;
592 }
593 count = min(port->break_length, 0xff);
594 sbus_writeb(CD180_C_ESC,
595 &bp->r[chip]->r[CD180_TDR]);
596 sbus_writeb(CD180_C_DELAY,
597 &bp->r[chip]->r[CD180_TDR]);
598 sbus_writeb(count,
599 &bp->r[chip]->r[CD180_TDR]);
600 if (!(port->break_length -= count))
601 port->break_length--;
602 } else {
603 sbus_writeb(CD180_C_ESC,
604 &bp->r[chip]->r[CD180_TDR]);
605 sbus_writeb(CD180_C_EBRK,
606 &bp->r[chip]->r[CD180_TDR]);
607 sbus_writeb(port->COR2,
608 &bp->r[chip]->r[CD180_COR2]);
609 aurora_wait_CCR(bp->r[chip]);
610 sbus_writeb(CCR_CORCHG2,
611 &bp->r[chip]->r[CD180_CCR]);
612 port->break_length = 0;
613 }
614 return;
615 }
616
617 count = CD180_NFIFO;
618 do {
619 u8 byte = port->xmit_buf[port->xmit_tail++];
620
621 sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
622 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
623 if (--port->xmit_cnt <= 0)
624 break;
625 } while (--count > 0);
626
627 if (port->xmit_cnt <= 0) {
628 sbus_writeb(port_No(port) & 7,
629 &bp->r[chip]->r[CD180_CAR]);
630 udelay(1);
631 port->SRER &= ~SRER_TXRDY;
632 sbus_writeb(port->SRER,
633 &bp->r[chip]->r[CD180_SRER]);
634 }
635 if (port->xmit_cnt <= port->wakeup_chars)
636 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
637 }
638
639 static void aurora_check_modem(struct Aurora_board const * bp, int chip)
640 {
641 struct Aurora_port *port;
642 struct tty_struct *tty;
643 unsigned char mcr;
644
645 if (!(port = aurora_get_port(bp, chip, "Modem")))
646 return;
647
648 tty = port->tty;
649
650 mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
651 if (mcr & MCR_CDCHG) {
652 if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD)
653 wake_up_interruptible(&port->open_wait);
654 else
655 schedule_task(&port->tqueue_hangup);
656 }
657
658 /* We don't have such things yet. My aurora board has DTR and RTS swapped, but that doesn't count in this driver. Let's hope
659 * Aurora didn't made any boards with CTS or DSR broken...
660 */
661 /* #ifdef AURORA_BRAIN_DAMAGED_CTS
662 if (mcr & MCR_CTSCHG) {
663 if (aurora_in(bp, CD180_MSVR) & MSVR_CTS) {
664 tty->hw_stopped = 0;
665 port->SRER |= SRER_TXRDY;
666 if (port->xmit_cnt <= port->wakeup_chars)
667 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
668 } else {
669 tty->hw_stopped = 1;
670 port->SRER &= ~SRER_TXRDY;
671 }
672 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
673 }
674 if (mcr & MCR_DSRCHG) {
675 if (aurora_in(bp, CD180_MSVR) & MSVR_DSR) {
676 tty->hw_stopped = 0;
677 port->SRER |= SRER_TXRDY;
678 if (port->xmit_cnt <= port->wakeup_chars)
679 aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
680 } else {
681 tty->hw_stopped = 1;
682 port->SRER &= ~SRER_TXRDY;
683 }
684 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
685 }
686 #endif AURORA_BRAIN_DAMAGED_CTS */
687
688 /* Clear change bits */
689 sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
690 }
691
692 /* The main interrupt processing routine */
693 static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs)
694 {
695 unsigned char status;
696 unsigned char ack,chip/*,chip_id*/;
697 struct Aurora_board * bp = (struct Aurora_board *) dev_id;
698 unsigned long loop = 0;
699
700 #ifdef AURORA_INT_DEBUG
701 printk("IRQ%d %d\n",irq,++irqhit);
702 #ifdef AURORA_FLOODPRO
703 if (irqhit>=AURORA_FLOODPRO)
704 sbus_writeb(8, &bp->r0->r);
705 #endif
706 #endif
707
708 /* old bp = IRQ_to_board[irq&0x0f];*/
709
710 if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
711 return IRQ_NONE;
712
713 /* The while() below takes care of this.
714 status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
715 #ifdef AURORA_INT_DEBUG
716 printk("mumu: %02x\n", status);
717 #endif
718 if (!(status&SRSR_ANYINT))
719 return IRQ_NONE; * Nobody has anything to say, so exit *
720 */
721 while ((loop++ < 48) &&
722 (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
723 #ifdef AURORA_INT_DEBUG
724 printk("SRSR: %02x\n", status);
725 #endif
726 if (status & SRSR_REXT) {
727 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
728 #ifdef AURORA_INT_DEBUG
729 printk("R-ACK %02x\n", ack);
730 #endif
731 if ((ack >> 5) == board_No(bp)) {
732 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
733 if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
734 aurora_receive(bp,chip);
735 sbus_writeb(0,
736 &bp->r[chip]->r[CD180_EOSRR]);
737 } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
738 aurora_receive_exc(bp,chip);
739 sbus_writeb(0,
740 &bp->r[chip]->r[CD180_EOSRR]);
741 }
742 }
743 }
744 } else if (status & SRSR_TEXT) {
745 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
746 #ifdef AURORA_INT_DEBUG
747 printk("T-ACK %02x\n", ack);
748 #endif
749 if ((ack >> 5) == board_No(bp)) {
750 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
751 if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
752 aurora_transmit(bp,chip);
753 sbus_writeb(0,
754 &bp->r[chip]->r[CD180_EOSRR]);
755 }
756 }
757 }
758 } else if (status & SRSR_MEXT) {
759 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
760 #ifdef AURORA_INT_DEBUG
761 printk("M-ACK %02x\n", ack);
762 #endif
763 if ((ack >> 5) == board_No(bp)) {
764 if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
765 if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
766 aurora_check_modem(bp,chip);
767 sbus_writeb(0,
768 &bp->r[chip]->r[CD180_EOSRR]);
769 }
770 }
771 }
772 }
773 }
774 /* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
775 #if 0
776 while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
777 #ifdef AURORA_INT_DEBUG
778 printk("SRSR: %02x\n",status);
779 #endif
780 ack = sbus_readb(&bp->r3->r[0]);
781 #ifdef AURORA_INT_DEBUG
782 printk("ACK: %02x\n",ack);
783 #endif
784 if ((ack>>5)==board_No(bp)) {
785 if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
786 ack&=GSVR_ITMASK;
787 if (ack==GSVR_IT_RGD) {
788 aurora_receive(bp,chip);
789 sbus_writeb(0,
790 &bp->r[chip]->r[CD180_EOSRR]);
791 } else if (ack==GSVR_IT_REXC) {
792 aurora_receive_exc(bp,chip);
793 sbus_writeb(0,
794 &bp->r[chip]->r[CD180_EOSRR]);
795 } else if (ack==GSVR_IT_TX) {
796 aurora_transmit(bp,chip);
797 sbus_writeb(0,
798 &bp->r[chip]->r[CD180_EOSRR]);
799 } else if (ack==GSVR_IT_MDM) {
800 aurora_check_modem(bp,chip);
801 sbus_writeb(0,
802 &bp->r[chip]->r[CD180_EOSRR]);
803 }
804 }
805 }
806 }
807 #endif
808
809 /* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
810 #if 0
811 for(chip=0;chip<AURORA_NCD180;chip++){
812 chip_id=(board_No(bp)<<5)|((chip+1)<<3);
813 loop=0;
814 while ((loop++ < 1) &&
815 ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
816 (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
817
818 if (status & SRSR_REXT) {
819 ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
820 if (ack == (chip_id | GSVR_IT_RGD)) {
821 #ifdef AURORA_INTMSG
822 printk("RX ACK\n");
823 #endif
824 aurora_receive(bp,chip);
825 } else if (ack == (chip_id | GSVR_IT_REXC)) {
826 #ifdef AURORA_INTMSG
827 printk("RXC ACK\n");
828 #endif
829 aurora_receive_exc(bp,chip);
830 } else {
831 #ifdef AURORA_INTNORM
832 printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
833 board_No(bp), chip, ack);
834 #endif
835 }
836 } else if (status & SRSR_TEXT) {
837 ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
838 if (ack == (chip_id | GSVR_IT_TX)){
839 #ifdef AURORA_INTMSG
840 printk("TX ACK\n");
841 #endif
842 aurora_transmit(bp,chip);
843 } else {
844 #ifdef AURORA_INTNORM
845 printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
846 board_No(bp), chip, ack);
847 #endif
848 }
849 } else if (status & SRSR_MEXT) {
850 ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
851 if (ack == (chip_id | GSVR_IT_MDM)){
852 #ifdef AURORA_INTMSG
853 printk("MDM ACK\n");
854 #endif
855 aurora_check_modem(bp,chip);
856 } else {
857 #ifdef AURORA_INTNORM
858 printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
859 board_No(bp), chip, ack);
860 #endif
861 }
862 }
863 sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
864 }
865 }
866 #endif
867
868 return IRQ_HANDLED;
869 }
870
871 #ifdef AURORA_INT_DEBUG
872 static void aurora_timer (unsigned long ignored);
873
874 static struct timer_list aurora_poll_timer =
875 TIMER_INITIALIZER(aurora_timer, 0, 0);
876
877 static void
878 aurora_timer (unsigned long ignored)
879 {
880 unsigned long flags;
881 int i;
882
883 save_flags(flags); cli();
884
885 printk("SRSR: %02x,%02x - ",
886 sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
887 sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
888 for (i = 0; i < 4; i++) {
889 udelay(1);
890 printk("%02x ",
891 sbus_readb(&aurora_board[0].r3->r[i]));
892 }
893 printk("\n");
894
895 aurora_poll_timer.expires = jiffies + 300;
896 add_timer (&aurora_poll_timer);
897
898 restore_flags(flags);
899 }
900 #endif
901
902 /*
903 * Routines for open & close processing.
904 */
905
906 /* Called with disabled interrupts */
907 static int aurora_setup_board(struct Aurora_board * bp)
908 {
909 int error;
910
911 #ifdef AURORA_ALLIRQ
912 int i;
913 for (i = 0; i < AURORA_ALLIRQ; i++) {
914 error = request_irq(allirq[i]|0x30, aurora_interrupt, SA_SHIRQ,
915 "sio16", bp);
916 if (error)
917 printk(KERN_ERR "IRQ%d request error %d\n",
918 allirq[i], error);
919 }
920 #else
921 error = request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ,
922 "sio16", bp);
923 if (error) {
924 printk(KERN_ERR "IRQ request error %d\n", error);
925 return error;
926 }
927 #endif
928 /* Board reset */
929 sbus_writeb(0, &bp->r0->r);
930 udelay(1);
931 if (bp->flags & AURORA_BOARD_TYPE_2) {
932 /* unknown yet */
933 } else {
934 sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
935 (((bp->irq)&0x0f)>>2)),
936 &bp->r0->r);
937 }
938 udelay(10000);
939
940 if (aurora_init_CD180(bp,0))error=1;error=0;
941 if (aurora_init_CD180(bp,1))error++;
942 if (error == AURORA_NCD180) {
943 printk(KERN_ERR "Both chips failed initialisation.\n");
944 return -EIO;
945 }
946
947 #ifdef AURORA_INT_DEBUG
948 aurora_poll_timer.expires= jiffies + 1;
949 add_timer(&aurora_poll_timer);
950 #endif
951 #ifdef AURORA_DEBUG
952 printk("aurora_setup_board: end\n");
953 #endif
954 return 0;
955 }
956
957 /* Called with disabled interrupts */
958 static void aurora_shutdown_board(struct Aurora_board *bp)
959 {
960 int i;
961
962 #ifdef AURORA_DEBUG
963 printk("aurora_shutdown_board: start\n");
964 #endif
965
966 #ifdef AURORA_INT_DEBUG
967 del_timer(&aurora_poll_timer);
968 #endif
969
970 #ifdef AURORA_ALLIRQ
971 for(i=0;i<AURORA_ALLIRQ;i++){
972 free_irq(allirq[i]|0x30, bp);
973 /* IRQ_to_board[allirq[i]&0xf] = NULL;*/
974 }
975 #else
976 free_irq(bp->irq|0x30, bp);
977 /* IRQ_to_board[bp->irq&0xf] = NULL;*/
978 #endif
979 /* Drop all DTR's */
980 for(i=0;i<16;i++){
981 sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
982 udelay(1);
983 sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
984 udelay(1);
985 }
986 /* Board shutdown */
987 sbus_writeb(0, &bp->r0->r);
988
989 #ifdef AURORA_DEBUG
990 printk("aurora_shutdown_board: end\n");
991 #endif
992 }
993
994 /* Setting up port characteristics.
995 * Must be called with disabled interrupts
996 */
997 static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
998 {
999 struct tty_struct *tty;
1000 unsigned long baud;
1001 long tmp;
1002 unsigned char cor1 = 0, cor3 = 0;
1003 unsigned char mcor1 = 0, mcor2 = 0,chip;
1004
1005 #ifdef AURORA_DEBUG
1006 printk("aurora_change_speed: start\n");
1007 #endif
1008 if (!(tty = port->tty) || !tty->termios)
1009 return;
1010
1011 chip = AURORA_CD180(port_No(port));
1012
1013 port->SRER = 0;
1014 port->COR2 = 0;
1015 port->MSVR = MSVR_RTS|MSVR_DTR;
1016
1017 baud = tty_get_baud_rate(tty);
1018
1019 /* Select port on the board */
1020 sbus_writeb(port_No(port) & 7,
1021 &bp->r[chip]->r[CD180_CAR]);
1022 udelay(1);
1023
1024 if (!baud) {
1025 /* Drop DTR & exit */
1026 port->MSVR &= ~(bp->DTR|bp->RTS);
1027 sbus_writeb(port->MSVR,
1028 &bp->r[chip]->r[CD180_MSVR]);
1029 return;
1030 } else {
1031 /* Set DTR on */
1032 port->MSVR |= bp->DTR;
1033 sbus_writeb(port->MSVR,
1034 &bp->r[chip]->r[CD180_MSVR]);
1035 }
1036
1037 /* Now we must calculate some speed dependent things. */
1038
1039 /* Set baud rate for port. */
1040 tmp = (((bp->oscfreq + baud/2) / baud +
1041 CD180_TPC/2) / CD180_TPC);
1042
1043 /* tmp = (bp->oscfreq/7)/baud;
1044 if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
1045 /* printk("Prescaler period: %d\n",tmp);*/
1046
1047 sbus_writeb((tmp >> 8) & 0xff,
1048 &bp->r[chip]->r[CD180_RBPRH]);
1049 sbus_writeb((tmp >> 8) & 0xff,
1050 &bp->r[chip]->r[CD180_TBPRH]);
1051 sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
1052 sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
1053
1054 baud = (baud + 5) / 10; /* Estimated CPS */
1055
1056 /* Two timer ticks seems enough to wakeup something like SLIP driver */
1057 tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
1058 port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
1059 SERIAL_XMIT_SIZE - 1 : tmp);
1060
1061 /* Receiver timeout will be transmission time for 1.5 chars */
1062 tmp = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
1063 tmp = (tmp > 0xff) ? 0xff : tmp;
1064 sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
1065
1066 switch (C_CSIZE(tty)) {
1067 case CS5:
1068 cor1 |= COR1_5BITS;
1069 break;
1070 case CS6:
1071 cor1 |= COR1_6BITS;
1072 break;
1073 case CS7:
1074 cor1 |= COR1_7BITS;
1075 break;
1076 case CS8:
1077 cor1 |= COR1_8BITS;
1078 break;
1079 }
1080
1081 if (C_CSTOPB(tty))
1082 cor1 |= COR1_2SB;
1083
1084 cor1 |= COR1_IGNORE;
1085 if (C_PARENB(tty)) {
1086 cor1 |= COR1_NORMPAR;
1087 if (C_PARODD(tty))
1088 cor1 |= COR1_ODDP;
1089 if (I_INPCK(tty))
1090 cor1 &= ~COR1_IGNORE;
1091 }
1092 /* Set marking of some errors */
1093 port->mark_mask = RCSR_OE | RCSR_TOUT;
1094 if (I_INPCK(tty))
1095 port->mark_mask |= RCSR_FE | RCSR_PE;
1096 if (I_BRKINT(tty) || I_PARMRK(tty))
1097 port->mark_mask |= RCSR_BREAK;
1098 if (I_IGNPAR(tty))
1099 port->mark_mask &= ~(RCSR_FE | RCSR_PE);
1100 if (I_IGNBRK(tty)) {
1101 port->mark_mask &= ~RCSR_BREAK;
1102 if (I_IGNPAR(tty))
1103 /* Real raw mode. Ignore all */
1104 port->mark_mask &= ~RCSR_OE;
1105 }
1106 /* Enable Hardware Flow Control */
1107 if (C_CRTSCTS(tty)) {
1108 /*#ifdef AURORA_BRAIN_DAMAGED_CTS
1109 port->SRER |= SRER_DSR | SRER_CTS;
1110 mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
1111 mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
1112 tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
1113 #else*/
1114 port->COR2 |= COR2_CTSAE;
1115 /*#endif*/
1116 if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
1117 mcor1 |= AURORA_RXTH;
1118 }
1119 }
1120 /* Enable Software Flow Control. FIXME: I'm not sure about this */
1121 /* Some people reported that it works, but I still doubt */
1122 if (I_IXON(tty)) {
1123 port->COR2 |= COR2_TXIBE;
1124 cor3 |= (COR3_FCT | COR3_SCDE);
1125 if (I_IXANY(tty))
1126 port->COR2 |= COR2_IXM;
1127 sbus_writeb(START_CHAR(tty),
1128 &bp->r[chip]->r[CD180_SCHR1]);
1129 sbus_writeb(STOP_CHAR(tty),
1130 &bp->r[chip]->r[CD180_SCHR2]);
1131 sbus_writeb(START_CHAR(tty),
1132 &bp->r[chip]->r[CD180_SCHR3]);
1133 sbus_writeb(STOP_CHAR(tty),
1134 &bp->r[chip]->r[CD180_SCHR4]);
1135 }
1136 if (!C_CLOCAL(tty)) {
1137 /* Enable CD check */
1138 port->SRER |= SRER_CD;
1139 mcor1 |= MCOR1_CDZD;
1140 mcor2 |= MCOR2_CDOD;
1141 }
1142
1143 if (C_CREAD(tty))
1144 /* Enable receiver */
1145 port->SRER |= SRER_RXD;
1146
1147 /* Set input FIFO size (1-8 bytes) */
1148 cor3 |= AURORA_RXFIFO;
1149 /* Setting up CD180 channel registers */
1150 sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
1151 sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1152 sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
1153 /* Make CD180 know about registers change */
1154 aurora_wait_CCR(bp->r[chip]);
1155 sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
1156 &bp->r[chip]->r[CD180_CCR]);
1157 /* Setting up modem option registers */
1158 sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
1159 sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
1160 /* Enable CD180 transmitter & receiver */
1161 aurora_wait_CCR(bp->r[chip]);
1162 sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
1163 /* Enable interrupts */
1164 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1165 /* And finally set RTS on */
1166 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1167 #ifdef AURORA_DEBUG
1168 printk("aurora_change_speed: end\n");
1169 #endif
1170 }
1171
1172 /* Must be called with interrupts enabled */
1173 static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
1174 {
1175 unsigned long flags;
1176
1177 #ifdef AURORA_DEBUG
1178 printk("aurora_setup_port: start %d\n",port_No(port));
1179 #endif
1180 if (port->flags & ASYNC_INITIALIZED)
1181 return 0;
1182
1183 if (!port->xmit_buf) {
1184 /* We may sleep in get_zeroed_page() */
1185 unsigned long tmp;
1186
1187 if (!(tmp = get_zeroed_page(GFP_KERNEL)))
1188 return -ENOMEM;
1189
1190 if (port->xmit_buf) {
1191 free_page(tmp);
1192 return -ERESTARTSYS;
1193 }
1194 port->xmit_buf = (unsigned char *) tmp;
1195 }
1196
1197 save_flags(flags); cli();
1198
1199 if (port->tty)
1200 clear_bit(TTY_IO_ERROR, &port->tty->flags);
1201
1202 #ifdef MODULE
1203 if ((port->count == 1) && ((++bp->count) == 1))
1204 bp->flags |= AURORA_BOARD_ACTIVE;
1205 #endif
1206
1207 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1208 aurora_change_speed(bp, port);
1209 port->flags |= ASYNC_INITIALIZED;
1210
1211 restore_flags(flags);
1212 #ifdef AURORA_DEBUG
1213 printk("aurora_setup_port: end\n");
1214 #endif
1215 return 0;
1216 }
1217
1218 /* Must be called with interrupts disabled */
1219 static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
1220 {
1221 struct tty_struct *tty;
1222 unsigned char chip;
1223
1224 #ifdef AURORA_DEBUG
1225 printk("aurora_shutdown_port: start\n");
1226 #endif
1227 if (!(port->flags & ASYNC_INITIALIZED))
1228 return;
1229
1230 chip = AURORA_CD180(port_No(port));
1231
1232 #ifdef AURORA_REPORT_OVERRUN
1233 printk("aurora%d: port %d: Total %ld overruns were detected.\n",
1234 board_No(bp), port_No(port), port->overrun);
1235 #endif
1236 #ifdef AURORA_REPORT_FIFO
1237 {
1238 int i;
1239
1240 printk("aurora%d: port %d: FIFO hits [ ",
1241 board_No(bp), port_No(port));
1242 for (i = 0; i < 10; i++) {
1243 printk("%ld ", port->hits[i]);
1244 }
1245 printk("].\n");
1246 }
1247 #endif
1248 if (port->xmit_buf) {
1249 free_page((unsigned long) port->xmit_buf);
1250 port->xmit_buf = NULL;
1251 }
1252
1253 if (!(tty = port->tty) || C_HUPCL(tty)) {
1254 /* Drop DTR */
1255 port->MSVR &= ~(bp->DTR|bp->RTS);
1256 sbus_writeb(port->MSVR,
1257 &bp->r[chip]->r[CD180_MSVR]);
1258 }
1259
1260 /* Select port */
1261 sbus_writeb(port_No(port) & 7,
1262 &bp->r[chip]->r[CD180_CAR]);
1263 udelay(1);
1264
1265 /* Reset port */
1266 aurora_wait_CCR(bp->r[chip]);
1267 sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
1268
1269 /* Disable all interrupts from this port */
1270 port->SRER = 0;
1271 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1272
1273 if (tty)
1274 set_bit(TTY_IO_ERROR, &tty->flags);
1275 port->flags &= ~ASYNC_INITIALIZED;
1276
1277 #ifdef MODULE
1278 if (--bp->count < 0) {
1279 printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
1280 "bad board count: %d\n",
1281 board_No(bp), bp->count);
1282 bp->count = 0;
1283 }
1284
1285 if (!bp->count)
1286 bp->flags &= ~AURORA_BOARD_ACTIVE;
1287 #endif
1288
1289 #ifdef AURORA_DEBUG
1290 printk("aurora_shutdown_port: end\n");
1291 #endif
1292 }
1293
1294
1295 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1296 struct Aurora_port *port)
1297 {
1298 DECLARE_WAITQUEUE(wait, current);
1299 struct Aurora_board *bp = port_Board(port);
1300 int retval;
1301 int do_clocal = 0;
1302 int CD;
1303 unsigned char chip;
1304
1305 #ifdef AURORA_DEBUG
1306 printk("block_til_ready: start\n");
1307 #endif
1308 chip = AURORA_CD180(port_No(port));
1309
1310 /* If the device is in the middle of being closed, then block
1311 * until it's done, and then try again.
1312 */
1313 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
1314 interruptible_sleep_on(&port->close_wait);
1315 if (port->flags & ASYNC_HUP_NOTIFY)
1316 return -EAGAIN;
1317 else
1318 return -ERESTARTSYS;
1319 }
1320
1321 /* If non-blocking mode is set, or the port is not enabled,
1322 * then make the check up front and then exit.
1323 */
1324 if ((filp->f_flags & O_NONBLOCK) ||
1325 (tty->flags & (1 << TTY_IO_ERROR))) {
1326 port->flags |= ASYNC_NORMAL_ACTIVE;
1327 return 0;
1328 }
1329
1330 if (C_CLOCAL(tty))
1331 do_clocal = 1;
1332
1333 /* Block waiting for the carrier detect and the line to become
1334 * free (i.e., not in use by the callout). While we are in
1335 * this loop, info->count is dropped by one, so that
1336 * rs_close() knows when to free things. We restore it upon
1337 * exit, either normal or abnormal.
1338 */
1339 retval = 0;
1340 add_wait_queue(&port->open_wait, &wait);
1341 cli();
1342 if (!tty_hung_up_p(filp))
1343 port->count--;
1344 sti();
1345 port->blocked_open++;
1346 while (1) {
1347 cli();
1348 sbus_writeb(port_No(port) & 7,
1349 &bp->r[chip]->r[CD180_CAR]);
1350 udelay(1);
1351 CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
1352 port->MSVR=bp->RTS;
1353
1354 /* auto drops DTR */
1355 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1356 sti();
1357 set_current_state(TASK_INTERRUPTIBLE);
1358 if (tty_hung_up_p(filp) ||
1359 !(port->flags & ASYNC_INITIALIZED)) {
1360 if (port->flags & ASYNC_HUP_NOTIFY)
1361 retval = -EAGAIN;
1362 else
1363 retval = -ERESTARTSYS;
1364 break;
1365 }
1366 if (!(port->flags & ASYNC_CLOSING) &&
1367 (do_clocal || CD))
1368 break;
1369 if (signal_pending(current)) {
1370 retval = -ERESTARTSYS;
1371 break;
1372 }
1373 schedule();
1374 }
1375 current->state = TASK_RUNNING;
1376 remove_wait_queue(&port->open_wait, &wait);
1377 if (!tty_hung_up_p(filp))
1378 port->count++;
1379 port->blocked_open--;
1380 if (retval)
1381 return retval;
1382
1383 port->flags |= ASYNC_NORMAL_ACTIVE;
1384 #ifdef AURORA_DEBUG
1385 printk("block_til_ready: end\n");
1386 #endif
1387 return 0;
1388 }
1389
1390 static int aurora_open(struct tty_struct * tty, struct file * filp)
1391 {
1392 int board;
1393 int error;
1394 struct Aurora_port * port;
1395 struct Aurora_board * bp;
1396 unsigned long flags;
1397
1398 #ifdef AURORA_DEBUG
1399 printk("aurora_open: start\n");
1400 #endif
1401
1402 board = AURORA_BOARD(tty->index);
1403 if (board > AURORA_NBOARD ||
1404 !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
1405 #ifdef AURORA_DEBUG
1406 printk("aurora_open: error board %d present %d\n",
1407 board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
1408 #endif
1409 return -ENODEV;
1410 }
1411
1412 bp = &aurora_board[board];
1413 port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
1414 if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
1415 #ifdef AURORA_DEBUG
1416 printk("aurora_open: error paranoia check\n");
1417 #endif
1418 return -ENODEV;
1419 }
1420
1421 port->count++;
1422 tty->driver_data = port;
1423 port->tty = tty;
1424
1425 if ((error = aurora_setup_port(bp, port))) {
1426 #ifdef AURORA_DEBUG
1427 printk("aurora_open: error aurora_setup_port ret %d\n",error);
1428 #endif
1429 return error;
1430 }
1431
1432 if ((error = block_til_ready(tty, filp, port))) {
1433 #ifdef AURORA_DEBUG
1434 printk("aurora_open: error block_til_ready ret %d\n",error);
1435 #endif
1436 return error;
1437 }
1438
1439 #ifdef AURORA_DEBUG
1440 printk("aurora_open: end\n");
1441 #endif
1442 return 0;
1443 }
1444
1445 static void aurora_close(struct tty_struct * tty, struct file * filp)
1446 {
1447 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1448 struct Aurora_board *bp;
1449 unsigned long flags;
1450 unsigned long timeout;
1451 unsigned char chip;
1452
1453 #ifdef AURORA_DEBUG
1454 printk("aurora_close: start\n");
1455 #endif
1456
1457 if (!port || (aurora_paranoia_check(port, tty->name, "close"))
1458 return;
1459
1460 chip = AURORA_CD180(port_No(port));
1461
1462 save_flags(flags); cli();
1463 if (tty_hung_up_p(filp)) {
1464 restore_flags(flags);
1465 return;
1466 }
1467
1468 bp = port_Board(port);
1469 if ((tty->count == 1) && (port->count != 1)) {
1470 printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
1471 "tty->count is 1, port count is %d\n",
1472 board_No(bp), port->count);
1473 port->count = 1;
1474 }
1475 if (--port->count < 0) {
1476 printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
1477 "count for tty%d: %d\n",
1478 board_No(bp), port_No(port), port->count);
1479 port->count = 0;
1480 }
1481 if (port->count) {
1482 restore_flags(flags);
1483 return;
1484 }
1485 port->flags |= ASYNC_CLOSING;
1486
1487 /* Now we wait for the transmit buffer to clear; and we notify
1488 * the line discipline to only process XON/XOFF characters.
1489 */
1490 tty->closing = 1;
1491 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
1492 #ifdef AURORA_DEBUG
1493 printk("aurora_close: waiting to flush...\n");
1494 #endif
1495 tty_wait_until_sent(tty, port->closing_wait);
1496 }
1497
1498 /* At this point we stop accepting input. To do this, we
1499 * disable the receive line status interrupts, and tell the
1500 * interrupt driver to stop checking the data ready bit in the
1501 * line status register.
1502 */
1503 port->SRER &= ~SRER_RXD;
1504 if (port->flags & ASYNC_INITIALIZED) {
1505 port->SRER &= ~SRER_TXRDY;
1506 port->SRER |= SRER_TXEMPTY;
1507 sbus_writeb(port_No(port) & 7,
1508 &bp->r[chip]->r[CD180_CAR]);
1509 udelay(1);
1510 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1511 /*
1512 * Before we drop DTR, make sure the UART transmitter
1513 * has completely drained; this is especially
1514 * important if there is a transmit FIFO!
1515 */
1516 timeout = jiffies+HZ;
1517 while(port->SRER & SRER_TXEMPTY) {
1518 msleep_interruptible(jiffies_to_msecs(port->timeout));
1519 if (time_after(jiffies, timeout))
1520 break;
1521 }
1522 }
1523 #ifdef AURORA_DEBUG
1524 printk("aurora_close: shutdown_port\n");
1525 #endif
1526 aurora_shutdown_port(bp, port);
1527 if (tty->driver->flush_buffer)
1528 tty->driver->flush_buffer(tty);
1529 tty_ldisc_flush(tty);
1530 tty->closing = 0;
1531 port->event = 0;
1532 port->tty = 0;
1533 if (port->blocked_open) {
1534 if (port->close_delay) {
1535 msleep_interruptible(jiffies_to_msecs(port->close_delay));
1536 }
1537 wake_up_interruptible(&port->open_wait);
1538 }
1539 port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1540 wake_up_interruptible(&port->close_wait);
1541 restore_flags(flags);
1542 #ifdef AURORA_DEBUG
1543 printk("aurora_close: end\n");
1544 #endif
1545 }
1546
1547 static int aurora_write(struct tty_struct * tty,
1548 const unsigned char *buf, int count)
1549 {
1550 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1551 struct Aurora_board *bp;
1552 int c, total = 0;
1553 unsigned long flags;
1554 unsigned char chip;
1555
1556 #ifdef AURORA_DEBUG
1557 printk("aurora_write: start %d\n",count);
1558 #endif
1559 if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
1560 return 0;
1561
1562 chip = AURORA_CD180(port_No(port));
1563
1564 bp = port_Board(port);
1565
1566 if (!tty || !port->xmit_buf || !tmp_buf)
1567 return 0;
1568
1569 save_flags(flags);
1570 while (1) {
1571 cli();
1572 c = min(count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1573 SERIAL_XMIT_SIZE - port->xmit_head));
1574 if (c <= 0) {
1575 restore_flags(flags);
1576 break;
1577 }
1578 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1579 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1580 port->xmit_cnt += c;
1581 restore_flags(flags);
1582
1583 buf += c;
1584 count -= c;
1585 total += c;
1586 }
1587
1588 cli();
1589 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1590 !(port->SRER & SRER_TXRDY)) {
1591 port->SRER |= SRER_TXRDY;
1592 sbus_writeb(port_No(port) & 7,
1593 &bp->r[chip]->r[CD180_CAR]);
1594 udelay(1);
1595 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1596 }
1597 restore_flags(flags);
1598 #ifdef AURORA_DEBUG
1599 printk("aurora_write: end %d\n",total);
1600 #endif
1601 return total;
1602 }
1603
1604 static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
1605 {
1606 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1607 unsigned long flags;
1608
1609 #ifdef AURORA_DEBUG
1610 printk("aurora_put_char: start %c\n",ch);
1611 #endif
1612 if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
1613 return;
1614
1615 if (!tty || !port->xmit_buf)
1616 return;
1617
1618 save_flags(flags); cli();
1619
1620 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1621 restore_flags(flags);
1622 return;
1623 }
1624
1625 port->xmit_buf[port->xmit_head++] = ch;
1626 port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1627 port->xmit_cnt++;
1628 restore_flags(flags);
1629 #ifdef AURORA_DEBUG
1630 printk("aurora_put_char: end\n");
1631 #endif
1632 }
1633
1634 static void aurora_flush_chars(struct tty_struct * tty)
1635 {
1636 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1637 unsigned long flags;
1638 unsigned char chip;
1639
1640 /*#ifdef AURORA_DEBUG
1641 printk("aurora_flush_chars: start\n");
1642 #endif*/
1643 if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
1644 return;
1645
1646 chip = AURORA_CD180(port_No(port));
1647
1648 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1649 !port->xmit_buf)
1650 return;
1651
1652 save_flags(flags); cli();
1653 port->SRER |= SRER_TXRDY;
1654 sbus_writeb(port_No(port) & 7,
1655 &port_Board(port)->r[chip]->r[CD180_CAR]);
1656 udelay(1);
1657 sbus_writeb(port->SRER,
1658 &port_Board(port)->r[chip]->r[CD180_SRER]);
1659 restore_flags(flags);
1660 /*#ifdef AURORA_DEBUG
1661 printk("aurora_flush_chars: end\n");
1662 #endif*/
1663 }
1664
1665 static int aurora_write_room(struct tty_struct * tty)
1666 {
1667 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1668 int ret;
1669
1670 #ifdef AURORA_DEBUG
1671 printk("aurora_write_room: start\n");
1672 #endif
1673 if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
1674 return 0;
1675
1676 ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1677 if (ret < 0)
1678 ret = 0;
1679 #ifdef AURORA_DEBUG
1680 printk("aurora_write_room: end\n");
1681 #endif
1682 return ret;
1683 }
1684
1685 static int aurora_chars_in_buffer(struct tty_struct *tty)
1686 {
1687 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1688
1689 if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
1690 return 0;
1691
1692 return port->xmit_cnt;
1693 }
1694
1695 static void aurora_flush_buffer(struct tty_struct *tty)
1696 {
1697 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1698 unsigned long flags;
1699
1700 #ifdef AURORA_DEBUG
1701 printk("aurora_flush_buffer: start\n");
1702 #endif
1703 if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
1704 return;
1705
1706 save_flags(flags); cli();
1707 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1708 restore_flags(flags);
1709
1710 tty_wakeup(tty);
1711 #ifdef AURORA_DEBUG
1712 printk("aurora_flush_buffer: end\n");
1713 #endif
1714 }
1715
1716 static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
1717 {
1718 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1719 struct Aurora_board * bp;
1720 unsigned char status,chip;
1721 unsigned int result;
1722 unsigned long flags;
1723
1724 #ifdef AURORA_DEBUG
1725 printk("aurora_get_modem_info: start\n");
1726 #endif
1727 if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1728 return -ENODEV;
1729
1730 chip = AURORA_CD180(port_No(port));
1731
1732 bp = port_Board(port);
1733
1734 save_flags(flags); cli();
1735
1736 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1737 udelay(1);
1738
1739 status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
1740 result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
1741
1742 restore_flags(flags);
1743
1744 result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
1745 | ((status & bp->DTR) ? TIOCM_DTR : 0)
1746 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1747 | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
1748 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1749
1750 #ifdef AURORA_DEBUG
1751 printk("aurora_get_modem_info: end\n");
1752 #endif
1753 return result;
1754 }
1755
1756 static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
1757 unsigned int set, unsigned int clear)
1758 {
1759 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1760 unsigned int arg;
1761 unsigned long flags;
1762 struct Aurora_board *bp = port_Board(port);
1763 unsigned char chip;
1764
1765 #ifdef AURORA_DEBUG
1766 printk("aurora_set_modem_info: start\n");
1767 #endif
1768 if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
1769 return -ENODEV;
1770
1771 chip = AURORA_CD180(port_No(port));
1772
1773 save_flags(flags); cli();
1774 if (set & TIOCM_RTS)
1775 port->MSVR |= bp->RTS;
1776 if (set & TIOCM_DTR)
1777 port->MSVR |= bp->DTR;
1778 if (clear & TIOCM_RTS)
1779 port->MSVR &= ~bp->RTS;
1780 if (clear & TIOCM_DTR)
1781 port->MSVR &= ~bp->DTR;
1782
1783 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1784 udelay(1);
1785
1786 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1787
1788 restore_flags(flags);
1789 #ifdef AURORA_DEBUG
1790 printk("aurora_set_modem_info: end\n");
1791 #endif
1792 return 0;
1793 }
1794
1795 static void aurora_send_break(struct Aurora_port * port, unsigned long length)
1796 {
1797 struct Aurora_board *bp = port_Board(port);
1798 unsigned long flags;
1799 unsigned char chip;
1800
1801 #ifdef AURORA_DEBUG
1802 printk("aurora_send_break: start\n");
1803 #endif
1804 chip = AURORA_CD180(port_No(port));
1805
1806 save_flags(flags); cli();
1807
1808 port->break_length = AURORA_TPS / HZ * length;
1809 port->COR2 |= COR2_ETC;
1810 port->SRER |= SRER_TXRDY;
1811 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1812 udelay(1);
1813
1814 sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
1815 sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
1816 aurora_wait_CCR(bp->r[chip]);
1817
1818 sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
1819 aurora_wait_CCR(bp->r[chip]);
1820
1821 restore_flags(flags);
1822 #ifdef AURORA_DEBUG
1823 printk("aurora_send_break: end\n");
1824 #endif
1825 }
1826
1827 static int aurora_set_serial_info(struct Aurora_port * port,
1828 struct serial_struct * newinfo)
1829 {
1830 struct serial_struct tmp;
1831 struct Aurora_board *bp = port_Board(port);
1832 int change_speed;
1833 unsigned long flags;
1834
1835 #ifdef AURORA_DEBUG
1836 printk("aurora_set_serial_info: start\n");
1837 #endif
1838 if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
1839 return -EFAULT;
1840 #if 0
1841 if ((tmp.irq != bp->irq) ||
1842 (tmp.port != bp->base) ||
1843 (tmp.type != PORT_CIRRUS) ||
1844 (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
1845 (tmp.custom_divisor != 0) ||
1846 (tmp.xmit_fifo_size != CD180_NFIFO) ||
1847 (tmp.flags & ~AURORA_LEGAL_FLAGS))
1848 return -EINVAL;
1849 #endif
1850
1851 change_speed = ((port->flags & ASYNC_SPD_MASK) !=
1852 (tmp.flags & ASYNC_SPD_MASK));
1853
1854 if (!capable(CAP_SYS_ADMIN)) {
1855 if ((tmp.close_delay != port->close_delay) ||
1856 (tmp.closing_wait != port->closing_wait) ||
1857 ((tmp.flags & ~ASYNC_USR_MASK) !=
1858 (port->flags & ~ASYNC_USR_MASK)))
1859 return -EPERM;
1860 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
1861 (tmp.flags & ASYNC_USR_MASK));
1862 } else {
1863 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1864 (tmp.flags & ASYNC_FLAGS));
1865 port->close_delay = tmp.close_delay;
1866 port->closing_wait = tmp.closing_wait;
1867 }
1868 if (change_speed) {
1869 save_flags(flags); cli();
1870 aurora_change_speed(bp, port);
1871 restore_flags(flags);
1872 }
1873 #ifdef AURORA_DEBUG
1874 printk("aurora_set_serial_info: end\n");
1875 #endif
1876 return 0;
1877 }
1878
1879 extern int aurora_get_serial_info(struct Aurora_port * port,
1880 struct serial_struct * retinfo)
1881 {
1882 struct serial_struct tmp;
1883 struct Aurora_board *bp = port_Board(port);
1884
1885 #ifdef AURORA_DEBUG
1886 printk("aurora_get_serial_info: start\n");
1887 #endif
1888 if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
1889 return -EFAULT;
1890
1891 memset(&tmp, 0, sizeof(tmp));
1892 tmp.type = PORT_CIRRUS;
1893 tmp.line = port - aurora_port;
1894 tmp.port = 0;
1895 tmp.irq = bp->irq;
1896 tmp.flags = port->flags;
1897 tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
1898 tmp.close_delay = port->close_delay * HZ/100;
1899 tmp.closing_wait = port->closing_wait * HZ/100;
1900 tmp.xmit_fifo_size = CD180_NFIFO;
1901 copy_to_user(retinfo, &tmp, sizeof(tmp));
1902 #ifdef AURORA_DEBUG
1903 printk("aurora_get_serial_info: end\n");
1904 #endif
1905 return 0;
1906 }
1907
1908 static int aurora_ioctl(struct tty_struct * tty, struct file * filp,
1909 unsigned int cmd, unsigned long arg)
1910
1911 {
1912 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1913 int retval;
1914
1915 #ifdef AURORA_DEBUG
1916 printk("aurora_ioctl: start\n");
1917 #endif
1918 if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
1919 return -ENODEV;
1920
1921 switch (cmd) {
1922 case TCSBRK: /* SVID version: non-zero arg --> no break */
1923 retval = tty_check_change(tty);
1924 if (retval)
1925 return retval;
1926 tty_wait_until_sent(tty, 0);
1927 if (!arg)
1928 aurora_send_break(port, HZ/4); /* 1/4 second */
1929 return 0;
1930 case TCSBRKP: /* support for POSIX tcsendbreak() */
1931 retval = tty_check_change(tty);
1932 if (retval)
1933 return retval;
1934 tty_wait_until_sent(tty, 0);
1935 aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
1936 return 0;
1937 case TIOCGSOFTCAR:
1938 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
1939 case TIOCSSOFTCAR:
1940 if (get_user(arg,(unsigned long *)arg))
1941 return -EFAULT;
1942 tty->termios->c_cflag =
1943 ((tty->termios->c_cflag & ~CLOCAL) |
1944 (arg ? CLOCAL : 0));
1945 return 0;
1946 case TIOCGSERIAL:
1947 return aurora_get_serial_info(port, (struct serial_struct *) arg);
1948 case TIOCSSERIAL:
1949 return aurora_set_serial_info(port, (struct serial_struct *) arg);
1950 default:
1951 return -ENOIOCTLCMD;
1952 };
1953 #ifdef AURORA_DEBUG
1954 printk("aurora_ioctl: end\n");
1955 #endif
1956 return 0;
1957 }
1958
1959 static void aurora_throttle(struct tty_struct * tty)
1960 {
1961 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1962 struct Aurora_board *bp;
1963 unsigned long flags;
1964 unsigned char chip;
1965
1966 #ifdef AURORA_DEBUG
1967 printk("aurora_throttle: start\n");
1968 #endif
1969 if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
1970 return;
1971
1972 bp = port_Board(port);
1973 chip = AURORA_CD180(port_No(port));
1974
1975 save_flags(flags); cli();
1976 port->MSVR &= ~bp->RTS;
1977 sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
1978 udelay(1);
1979 if (I_IXOFF(tty)) {
1980 aurora_wait_CCR(bp->r[chip]);
1981 sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
1982 aurora_wait_CCR(bp->r[chip]);
1983 }
1984 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
1985 restore_flags(flags);
1986 #ifdef AURORA_DEBUG
1987 printk("aurora_throttle: end\n");
1988 #endif
1989 }
1990
1991 static void aurora_unthrottle(struct tty_struct * tty)
1992 {
1993 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
1994 struct Aurora_board *bp;
1995 unsigned long flags;
1996 unsigned char chip;
1997
1998 #ifdef AURORA_DEBUG
1999 printk("aurora_unthrottle: start\n");
2000 #endif
2001 if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
2002 return;
2003
2004 bp = port_Board(port);
2005
2006 chip = AURORA_CD180(port_No(port));
2007
2008 save_flags(flags); cli();
2009 port->MSVR |= bp->RTS;
2010 sbus_writeb(port_No(port) & 7,
2011 &bp->r[chip]->r[CD180_CAR]);
2012 udelay(1);
2013 if (I_IXOFF(tty)) {
2014 aurora_wait_CCR(bp->r[chip]);
2015 sbus_writeb(CCR_SSCH1,
2016 &bp->r[chip]->r[CD180_CCR]);
2017 aurora_wait_CCR(bp->r[chip]);
2018 }
2019 sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
2020 restore_flags(flags);
2021 #ifdef AURORA_DEBUG
2022 printk("aurora_unthrottle: end\n");
2023 #endif
2024 }
2025
2026 static void aurora_stop(struct tty_struct * tty)
2027 {
2028 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2029 struct Aurora_board *bp;
2030 unsigned long flags;
2031 unsigned char chip;
2032
2033 #ifdef AURORA_DEBUG
2034 printk("aurora_stop: start\n");
2035 #endif
2036 if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
2037 return;
2038
2039 bp = port_Board(port);
2040
2041 chip = AURORA_CD180(port_No(port));
2042
2043 save_flags(flags); cli();
2044 port->SRER &= ~SRER_TXRDY;
2045 sbus_writeb(port_No(port) & 7,
2046 &bp->r[chip]->r[CD180_CAR]);
2047 udelay(1);
2048 sbus_writeb(port->SRER,
2049 &bp->r[chip]->r[CD180_SRER]);
2050 restore_flags(flags);
2051 #ifdef AURORA_DEBUG
2052 printk("aurora_stop: end\n");
2053 #endif
2054 }
2055
2056 static void aurora_start(struct tty_struct * tty)
2057 {
2058 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2059 struct Aurora_board *bp;
2060 unsigned long flags;
2061 unsigned char chip;
2062
2063 #ifdef AURORA_DEBUG
2064 printk("aurora_start: start\n");
2065 #endif
2066 if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
2067 return;
2068
2069 bp = port_Board(port);
2070
2071 chip = AURORA_CD180(port_No(port));
2072
2073 save_flags(flags); cli();
2074 if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY)) {
2075 port->SRER |= SRER_TXRDY;
2076 sbus_writeb(port_No(port) & 7,
2077 &bp->r[chip]->r[CD180_CAR]);
2078 udelay(1);
2079 sbus_writeb(port->SRER,
2080 &bp->r[chip]->r[CD180_SRER]);
2081 }
2082 restore_flags(flags);
2083 #ifdef AURORA_DEBUG
2084 printk("aurora_start: end\n");
2085 #endif
2086 }
2087
2088 /*
2089 * This routine is called from the scheduler tqueue when the interrupt
2090 * routine has signalled that a hangup has occurred. The path of
2091 * hangup processing is:
2092 *
2093 * serial interrupt routine -> (scheduler tqueue) ->
2094 * do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
2095 *
2096 */
2097 static void do_aurora_hangup(void *private_)
2098 {
2099 struct Aurora_port *port = (struct Aurora_port *) private_;
2100 struct tty_struct *tty;
2101
2102 #ifdef AURORA_DEBUG
2103 printk("do_aurora_hangup: start\n");
2104 #endif
2105 tty = port->tty;
2106 if (tty != NULL) {
2107 tty_hangup(tty); /* FIXME: module removal race - AKPM */
2108 #ifdef AURORA_DEBUG
2109 printk("do_aurora_hangup: end\n");
2110 #endif
2111 }
2112 }
2113
2114 static void aurora_hangup(struct tty_struct * tty)
2115 {
2116 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2117 struct Aurora_board *bp;
2118
2119 #ifdef AURORA_DEBUG
2120 printk("aurora_hangup: start\n");
2121 #endif
2122 if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
2123 return;
2124
2125 bp = port_Board(port);
2126
2127 aurora_shutdown_port(bp, port);
2128 port->event = 0;
2129 port->count = 0;
2130 port->flags &= ~ASYNC_NORMAL_ACTIVE;
2131 port->tty = 0;
2132 wake_up_interruptible(&port->open_wait);
2133 #ifdef AURORA_DEBUG
2134 printk("aurora_hangup: end\n");
2135 #endif
2136 }
2137
2138 static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
2139 {
2140 struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
2141 unsigned long flags;
2142
2143 #ifdef AURORA_DEBUG
2144 printk("aurora_set_termios: start\n");
2145 #endif
2146 if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
2147 return;
2148
2149 if (tty->termios->c_cflag == old_termios->c_cflag &&
2150 tty->termios->c_iflag == old_termios->c_iflag)
2151 return;
2152
2153 save_flags(flags); cli();
2154 aurora_change_speed(port_Board(port), port);
2155 restore_flags(flags);
2156
2157 if ((old_termios->c_cflag & CRTSCTS) &&
2158 !(tty->termios->c_cflag & CRTSCTS)) {
2159 tty->hw_stopped = 0;
2160 aurora_start(tty);
2161 }
2162 #ifdef AURORA_DEBUG
2163 printk("aurora_set_termios: end\n");
2164 #endif
2165 }
2166
2167 static void do_aurora_bh(void)
2168 {
2169 run_task_queue(&tq_aurora);
2170 }
2171
2172 static void do_softint(void *private_)
2173 {
2174 struct Aurora_port *port = (struct Aurora_port *) private_;
2175 struct tty_struct *tty;
2176
2177 #ifdef AURORA_DEBUG
2178 printk("do_softint: start\n");
2179 #endif
2180 tty = port->tty;
2181 if (tty == NULL)
2182 return;
2183
2184 if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
2185 tty_wakeup(tty);
2186 }
2187 #ifdef AURORA_DEBUG
2188 printk("do_softint: end\n");
2189 #endif
2190 }
2191
2192 static struct tty_operations aurora_ops = {
2193 .open = aurora_open,
2194 .close = aurora_close,
2195 .write = aurora_write,
2196 .put_char = aurora_put_char,
2197 .flush_chars = aurora_flush_chars,
2198 .write_room = aurora_write_room,
2199 .chars_in_buffer = aurora_chars_in_buffer,
2200 .flush_buffer = aurora_flush_buffer,
2201 .ioctl = aurora_ioctl,
2202 .throttle = aurora_throttle,
2203 .unthrottle = aurora_unthrottle,
2204 .set_termios = aurora_set_termios,
2205 .stop = aurora_stop,
2206 .start = aurora_start,
2207 .hangup = aurora_hangup,
2208 .tiocmget = aurora_tiocmget,
2209 .tiocmset = aurora_tiocmset,
2210 };
2211
2212 static int aurora_init_drivers(void)
2213 {
2214 int error;
2215 int i;
2216
2217 #ifdef AURORA_DEBUG
2218 printk("aurora_init_drivers: start\n");
2219 #endif
2220 tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
2221 if (tmp_buf == NULL) {
2222 printk(KERN_ERR "aurora: Couldn't get free page.\n");
2223 return 1;
2224 }
2225 init_bh(AURORA_BH, do_aurora_bh);
2226 aurora_driver = alloc_tty_driver(AURORA_INPORTS);
2227 if (!aurora_driver) {
2228 printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
2229 free_page((unsigned long) tmp_buf);
2230 return 1;
2231 }
2232 aurora_driver->owner = THIS_MODULE;
2233 aurora_driver->name = "ttyA";
2234 aurora_driver->major = AURORA_MAJOR;
2235 aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
2236 aurora_driver->subtype = SERIAL_TYPE_NORMAL;
2237 aurora_driver->init_termios = tty_std_termios;
2238 aurora_driver->init_termios.c_cflag =
2239 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2240 aurora_driver->flags = TTY_DRIVER_REAL_RAW;
2241 tty_set_operations(aurora_driver, &aurora_ops);
2242 error = tty_register_driver(aurora_driver);
2243 if (error) {
2244 put_tty_driver(aurora_driver);
2245 free_page((unsigned long) tmp_buf);
2246 printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
2247 error);
2248 return 1;
2249 }
2250
2251 memset(aurora_port, 0, sizeof(aurora_port));
2252 for (i = 0; i < AURORA_TNPORTS; i++) {
2253 aurora_port[i].magic = AURORA_MAGIC;
2254 aurora_port[i].tqueue.routine = do_softint;
2255 aurora_port[i].tqueue.data = &aurora_port[i];
2256 aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
2257 aurora_port[i].tqueue_hangup.data = &aurora_port[i];
2258 aurora_port[i].close_delay = 50 * HZ/100;
2259 aurora_port[i].closing_wait = 3000 * HZ/100;
2260 init_waitqueue_head(&aurora_port[i].open_wait);
2261 init_waitqueue_head(&aurora_port[i].close_wait);
2262 }
2263 #ifdef AURORA_DEBUG
2264 printk("aurora_init_drivers: end\n");
2265 #endif
2266 return 0;
2267 }
2268
2269 static void aurora_release_drivers(void)
2270 {
2271 #ifdef AURORA_DEBUG
2272 printk("aurora_release_drivers: start\n");
2273 #endif
2274 free_page((unsigned long)tmp_buf);
2275 tty_unregister_driver(aurora_driver);
2276 put_tty_driver(aurora_driver);
2277 #ifdef AURORA_DEBUG
2278 printk("aurora_release_drivers: end\n");
2279 #endif
2280 }
2281
2282 /*
2283 * Called at boot time.
2284 *
2285 * You can specify IO base for up to RC_NBOARD cards,
2286 * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
2287 * Note that there will be no probing at default
2288 * addresses in this case.
2289 *
2290 */
2291 void __init aurora_setup(char *str, int *ints)
2292 {
2293 int i;
2294
2295 for(i=0;(i<ints[0])&&(i<4);i++) {
2296 if (ints[i+1]) irqs[i]=ints[i+1];
2297 }
2298 }
2299
2300 static int __init aurora_real_init(void)
2301 {
2302 int found;
2303 int i;
2304
2305 printk(KERN_INFO "aurora: Driver starting.\n");
2306 if(aurora_init_drivers())
2307 return -EIO;
2308 found = aurora_probe();
2309 if(!found) {
2310 aurora_release_drivers();
2311 printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
2312 return -EIO;
2313 } else {
2314 printk(KERN_INFO "aurora: %d boards found.\n", found);
2315 }
2316 for (i = 0; i < found; i++) {
2317 int ret = aurora_setup_board(&aurora_board[i]);
2318
2319 if (ret) {
2320 #ifdef AURORA_DEBUG
2321 printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
2322 ret);
2323 #endif
2324 return ret;
2325 }
2326 }
2327 return 0;
2328 }
2329
2330 int irq = 0;
2331 int irq1 = 0;
2332 int irq2 = 0;
2333 int irq3 = 0;
2334 module_param(irq , int, 0);
2335 module_param(irq1, int, 0);
2336 module_param(irq2, int, 0);
2337 module_param(irq3, int, 0);
2338
2339 static int __init aurora_init(void)
2340 {
2341 if (irq ) irqs[0]=irq ;
2342 if (irq1) irqs[1]=irq1;
2343 if (irq2) irqs[2]=irq2;
2344 if (irq3) irqs[3]=irq3;
2345 return aurora_real_init();
2346 }
2347
2348 static void __exit aurora_cleanup(void)
2349 {
2350 int i;
2351
2352 #ifdef AURORA_DEBUG
2353 printk("cleanup_module: aurora_release_drivers\n");
2354 #endif
2355
2356 aurora_release_drivers();
2357 for (i = 0; i < AURORA_NBOARD; i++)
2358 if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
2359 aurora_shutdown_board(&aurora_board[i]);
2360 aurora_release_io_range(&aurora_board[i]);
2361 }
2362 }
2363
2364 module_init(aurora_init);
2365 module_exit(aurora_cleanup);
2366 MODULE_LICENSE("GPL");
kernel-based virtual machine