projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[ALSA] semaphore -> mutex (ISA part)
[deliverable/linux.git] / sound / pci / mixart / mixart_core.c
CommitLineData
1da177e4
LT		 1/*
2 * Driver for Digigram miXart soundcards
3 *
4 * low level interface with interrupt handling and mail box implementation
5 *
6 * Copyright (c) 2003 by Digigram <alsa@digigram.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#include <sound/driver.h>
24#include <linux/interrupt.h>
25#include <asm/io.h>
26#include <sound/core.h>
27#include "mixart.h"
28#include "mixart_hwdep.h"
29#include "mixart_core.h"
30
31
32#define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */
33
34#define MSG_DESCRIPTOR_SIZE 0x24
35#define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4)
36
37#define MSG_DEFAULT_SIZE 512
38
39#define MSG_TYPE_MASK 0x00000003 /* mask for following types */
40#define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */
41#define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */
42#define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */
43#define MSG_TYPE_ANSWER 3 /* embedded -> driver */
44#define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */
45
46
67b48b88 47static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
1da177e4
LT		 48{
49 /* read the message frame fifo */
50 u32 headptr, tailptr;
51
52 tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
53 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));
54
55 if (tailptr == headptr)
56 return 0; /* no message posted */
57
58 snd_assert( tailptr >= MSG_OUTBOUND_POST_STACK, return 0); /* error */
59 snd_assert( tailptr < (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE), return 0); /* error */
60
61 *msg_frame = readl_be(MIXART_MEM(mgr, tailptr));
62
63 /* increment the tail index */
64 tailptr += 4;
65 if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
66 tailptr = MSG_OUTBOUND_POST_STACK;
67 writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
68
69 return 1;
70}
71
67b48b88
TI		 72static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
73 u32 msg_frame_address )
1da177e4
LT		 74{
75 unsigned long flags;
76 u32 headptr;
77 u32 size;
78 int err;
79#ifndef __BIG_ENDIAN
80 unsigned int i;
81#endif
82
83 spin_lock_irqsave(&mgr->msg_lock, flags);
84 err = 0;
85
86 /* copy message descriptor from miXart to driver */
87 size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */
88 resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */
89 resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */
90 resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */
91
92 if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
93 err = -EINVAL;
94 snd_printk(KERN_ERR "problem with response size = %d\n", size);
95 goto _clean_exit;
96 }
97 size -= MSG_DESCRIPTOR_SIZE;
98
99 memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
100 resp->size = size;
101
102 /* swap if necessary */
103#ifndef __BIG_ENDIAN
104 size /= 4; /* u32 size */
105 for(i=0; i < size; i++) {
106 ((u32*)resp->data)[i] = be32_to_cpu(((u32*)resp->data)[i]);
107 }
108#endif
109
110 /*
111 * free message frame address
112 */
113 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
114
115 if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
116 err = -EINVAL;
117 goto _clean_exit;
118 }
119
120 /* give address back to outbound fifo */
121 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
122
123 /* increment the outbound free head */
124 headptr += 4;
125 if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
126 headptr = MSG_OUTBOUND_FREE_STACK;
127
128 writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
129
130 _clean_exit:
131 spin_unlock_irqrestore(&mgr->msg_lock, flags);
132
133 return err;
134}
135
136
137/*
138 * send a message to miXart. return: the msg_frame used for this message
139 */
140/* call with mgr->msg_lock held! */
67b48b88
TI		 141static int send_msg( struct mixart_mgr *mgr,
142 struct mixart_msg *msg,
1da177e4
LT		 143 int max_answersize,
144 int mark_pending,
145 u32 *msg_event)
146{
147 u32 headptr, tailptr;
148 u32 msg_frame_address;
149 int err, i;
150
151 snd_assert(msg->size % 4 == 0, return -EINVAL);
152
153 err = 0;
154
155 /* get message frame address */
156 tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
157 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));
158
159 if (tailptr == headptr) {
160 snd_printk(KERN_ERR "error: no message frame available\n");
161 return -EBUSY;
162 }
163
164 if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
165 return -EINVAL;
166 }
167
168 msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
169 writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */
170
171 /* increment the inbound free tail */
172 tailptr += 4;
173 if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
174 tailptr = MSG_INBOUND_FREE_STACK;
175
176 writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
177
178 /* TODO : use memcpy_toio() with intermediate buffer to copy the message */
179
180 /* copy message descriptor to card memory */
181 writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */
182 writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */
183 writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */
184 writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
185 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
186 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
187 writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
188 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
189 writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
190 writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */
191
192 /* copy message data to card memory */
193 for( i=0; i < msg->size; i+=4 ) {
194 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) );
195 }
196
197 if( mark_pending ) {
198 if( *msg_event ) {
199 /* the pending event is the notification we wait for ! */
200 mgr->pending_event = *msg_event;
201 }
202 else {
203 /* the pending event is the answer we wait for (same address than the request)! */
204 mgr->pending_event = msg_frame_address;
205
206 /* copy address back to caller */
207 *msg_event = msg_frame_address;
208 }
209 }
210
211 /* mark the frame as a request (will have an answer) */
212 msg_frame_address |= MSG_TYPE_REQUEST;
213
214 /* post the frame */
215 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
216
217 if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
218 return -EINVAL;
219 }
220
221 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
222
223 /* increment the inbound post head */
224 headptr += 4;
225 if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
226 headptr = MSG_INBOUND_POST_STACK;
227
228 writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
229
230 return 0;
231}
232
233
67b48b88 234int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
1da177e4 235{
67b48b88 236 struct mixart_msg resp;
1da177e4
LT		 237 u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
238 int err;
239 wait_queue_t wait;
240 long timeout;
241
242 down(&mgr->msg_mutex);
243
244 init_waitqueue_entry(&wait, current);
245
246 spin_lock_irq(&mgr->msg_lock);
247 /* send the message */
248 err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */
249 if (err) {
250 spin_unlock_irq(&mgr->msg_lock);
251 up(&mgr->msg_mutex);
252 return err;
253 }
254
255 set_current_state(TASK_UNINTERRUPTIBLE);
256 add_wait_queue(&mgr->msg_sleep, &wait);
257 spin_unlock_irq(&mgr->msg_lock);
258 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
259 remove_wait_queue(&mgr->msg_sleep, &wait);
260
261 if (! timeout) {
262 /* error - no ack */
263 up(&mgr->msg_mutex);
264 snd_printk(KERN_ERR "error: no reponse on msg %x\n", msg_frame);
265 return -EIO;
266 }
267
67b48b88 268 /* retrieve the answer into the same struct mixart_msg */
1da177e4 269 resp.message_id = 0;
67b48b88 270 resp.uid = (struct mixart_uid){0,0};
1da177e4
LT		 271 resp.data = resp_data;
272 resp.size = max_resp_size;
273
274 err = get_msg(mgr, &resp, msg_frame);
275
276 if( request->message_id != resp.message_id )
277 snd_printk(KERN_ERR "REPONSE ERROR!\n");
278
279 up(&mgr->msg_mutex);
280 return err;
281}
282
283
67b48b88
TI		 284int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
285 struct mixart_msg *request, u32 notif_event)
1da177e4
LT		 286{
287 int err;
288 wait_queue_t wait;
289 long timeout;
290
291 snd_assert(notif_event != 0, return -EINVAL);
292 snd_assert((notif_event & MSG_TYPE_MASK) == MSG_TYPE_NOTIFY, return -EINVAL);
293 snd_assert((notif_event & MSG_CANCEL_NOTIFY_MASK) == 0, return -EINVAL);
294
295 down(&mgr->msg_mutex);
296
297 init_waitqueue_entry(&wait, current);
298
299 spin_lock_irq(&mgr->msg_lock);
300 /* send the message */
301 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, &notif_event); /* send and mark the notification event pending */
302 if(err) {
303 spin_unlock_irq(&mgr->msg_lock);
304 up(&mgr->msg_mutex);
305 return err;
306 }
307
308 set_current_state(TASK_UNINTERRUPTIBLE);
309 add_wait_queue(&mgr->msg_sleep, &wait);
310 spin_unlock_irq(&mgr->msg_lock);
311 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
312 remove_wait_queue(&mgr->msg_sleep, &wait);
313
314 if (! timeout) {
315 /* error - no ack */
316 up(&mgr->msg_mutex);
317 snd_printk(KERN_ERR "error: notification %x not received\n", notif_event);
318 return -EIO;
319 }
320
321 up(&mgr->msg_mutex);
322 return 0;
323}
324
325
67b48b88 326int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
1da177e4
LT		 327{
328 u32 message_frame;
329 unsigned long flags;
330 int err;
331
332 /* just send the message (do not mark it as a pending one) */
333 spin_lock_irqsave(&mgr->msg_lock, flags);
334 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
335 spin_unlock_irqrestore(&mgr->msg_lock, flags);
336
67b48b88 337 /* the answer will be handled by snd_struct mixart_msgasklet() */
1da177e4
LT		 338 atomic_inc(&mgr->msg_processed);
339
340 return err;
341}
342
343
344/* common buffer of tasklet and interrupt to send/receive messages */
345static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
346
347
67b48b88 348void snd_mixart_msg_tasklet(unsigned long arg)
1da177e4 349{
67b48b88
TI		 350 struct mixart_mgr *mgr = ( struct mixart_mgr*)(arg);
351 struct mixart_msg resp;
1da177e4
LT		 352 u32 msg, addr, type;
353 int err;
354
355 spin_lock(&mgr->lock);
356
357 while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
358 msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
359 mgr->msg_fifo_readptr++;
360 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;
361
362 /* process the message ... */
363 addr = msg & ~MSG_TYPE_MASK;
364 type = msg & MSG_TYPE_MASK;
365
366 switch (type) {
367 case MSG_TYPE_ANSWER:
368 /* answer to a message on that we did not wait for (send_msg_nonblock) */
369 resp.message_id = 0;
370 resp.data = mixart_msg_data;
371 resp.size = sizeof(mixart_msg_data);
372 err = get_msg(mgr, &resp, addr);
373 if( err < 0 ) {
374 snd_printk(KERN_ERR "tasklet: error(%d) reading mf %x\n", err, msg);
375 break;
376 }
377
378 switch(resp.message_id) {
379 case MSG_STREAM_START_INPUT_STAGE_PACKET:
380 case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
381 case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
382 case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
383 if(mixart_msg_data[0])
384 snd_printk(KERN_ERR "tasklet : error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n", mixart_msg_data[0]);
385 break;
386 default:
387 snd_printdd("tasklet received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
388 msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
389 break;
390 }
391 break;
392 case MSG_TYPE_NOTIFY:
393 /* msg contains no address ! do not get_msg() ! */
394 case MSG_TYPE_COMMAND:
395 /* get_msg() necessary */
396 default:
397 snd_printk(KERN_ERR "tasklet doesn't know what to do with message %x\n", msg);
398 } /* switch type */
399
400 /* decrement counter */
401 atomic_dec(&mgr->msg_processed);
402
403 } /* while there is a msg in fifo */
404
405 spin_unlock(&mgr->lock);
406}
407
408
409irqreturn_t snd_mixart_interrupt(int irq, void *dev_id, struct pt_regs *regs)
410{
67b48b88 411 struct mixart_mgr *mgr = dev_id;
1da177e4 412 int err;
67b48b88 413 struct mixart_msg resp;
1da177e4
LT		 414
415 u32 msg;
416 u32 it_reg;
417
418 spin_lock(&mgr->lock);
419
420 it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
421 if( !(it_reg & MIXART_OIDI) ) {
422 /* this device did not cause the interrupt */
423 spin_unlock(&mgr->lock);
424 return IRQ_NONE;
425 }
426
427 /* mask all interrupts */
428 writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
429
430 /* outdoorbell register clear */
431 it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
432 writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
433
434 /* clear interrupt */
435 writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
436
437 /* process interrupt */
438 while (retrieve_msg_frame(mgr, &msg)) {
439
440 switch (msg & MSG_TYPE_MASK) {
441 case MSG_TYPE_COMMAND:
442 resp.message_id = 0;
443 resp.data = mixart_msg_data;
444 resp.size = sizeof(mixart_msg_data);
445 err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
446 if( err < 0 ) {
447 snd_printk(KERN_ERR "interrupt: error(%d) reading mf %x\n", err, msg);
448 break;
449 }
450
451 if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
452 int i;
67b48b88
TI		 453 struct mixart_timer_notify *notify;
454 notify = (struct mixart_timer_notify *)mixart_msg_data;
1da177e4
LT		 455
456 for(i=0; i<notify->stream_count; i++) {
457
458 u32 buffer_id = notify->streams[i].buffer_id;
459 unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
460 unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */
461 unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */
462 unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */
463
67b48b88
TI		 464 struct snd_mixart *chip = mgr->chip[chip_number];
465 struct mixart_stream *stream;
1da177e4
LT		 466
467 if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
468 snd_printk(KERN_ERR "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
469 buffer_id, notify->streams[i].sample_pos_low_part);
470 break;
471 }
472
473 if (is_capture)
474 stream = &chip->capture_stream[pcm_number];
475 else
476 stream = &chip->playback_stream[pcm_number][sub_number];
477
478 if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
67b48b88 479 struct snd_pcm_runtime *runtime = stream->substream->runtime;
1da177e4
LT		 480 int elapsed = 0;
481 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
482 sample_count |= notify->streams[i].sample_pos_low_part;
483
484 while (1) {
485 u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size;
486
487 if (new_elapse_pos > sample_count) {
488 break; /* while */
489 }
490 else {
491 elapsed = 1;
492 stream->buf_periods++;
493 if (stream->buf_periods >= runtime->periods)
494 stream->buf_periods = 0;
495
496 stream->abs_period_elapsed = new_elapse_pos;
497 }
498 }
499 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
500
501 if(elapsed) {
502 spin_unlock(&mgr->lock);
503 snd_pcm_period_elapsed(stream->substream);
504 spin_lock(&mgr->lock);
505 }
506 }
507 }
508 break;
509 }
510 if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
511 if(resp.size > 1) {
512#ifndef __BIG_ENDIAN
513 /* Traces are text: the swapped msg_data has to be swapped back ! */
514 int i;
515 for(i=0; i<(resp.size/4); i++) {
516 (mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
517 }
518#endif
519 ((char*)mixart_msg_data)[resp.size - 1] = 0;
520 snd_printdd("MIXART TRACE : %s\n", (char*)mixart_msg_data);
521 }
522 break;
523 }
524
525 snd_printdd("command %x not handled\n", resp.message_id);
526 break;
527
528 case MSG_TYPE_NOTIFY:
529 if(msg & MSG_CANCEL_NOTIFY_MASK) {
530 msg &= ~MSG_CANCEL_NOTIFY_MASK;
531 snd_printk(KERN_ERR "canceled notification %x !\n", msg);
532 }
533 /* no break, continue ! */
534 case MSG_TYPE_ANSWER:
535 /* answer or notification to a message we are waiting for*/
536 spin_lock(&mgr->msg_lock);
537 if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
538 wake_up(&mgr->msg_sleep);
539 mgr->pending_event = 0;
540 }
541 /* answer to a message we did't want to wait for */
542 else {
543 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
544 mgr->msg_fifo_writeptr++;
545 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
546 tasklet_hi_schedule(&mgr->msg_taskq);
547 }
548 spin_unlock(&mgr->msg_lock);
549 break;
550 case MSG_TYPE_REQUEST:
551 default:
552 snd_printdd("interrupt received request %x\n", msg);
553 /* TODO : are there things to do here ? */
554 break;
555 } /* switch on msg type */
556 } /* while there are msgs */
557
558 /* allow interrupt again */
559 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
560
561 spin_unlock(&mgr->lock);
562
563 return IRQ_HANDLED;
564}
565
566
67b48b88 567void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
1da177e4
LT		 568{
569 writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) );
570 writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) );
571
572 /* allow outbound messagebox to generate interrupts */
573 if(mgr->irq >= 0) {
574 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
575 }
576 return;
577}
578
67b48b88 579void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
1da177e4
LT		 580{
581 /* no more interrupts on outbound messagebox */
582 writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
583 return;
584}
585
67b48b88 586void snd_mixart_reset_board(struct mixart_mgr *mgr)
1da177e4
LT		 587{
588 /* reset miXart */
589 writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) );
590 return;
591}
Linux kernel - Deliverables
This page took 0.127788 seconds and 5 git commands to generate.