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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 <linux/interrupt.h>
24#include <linux/mutex.h>
25#include <linux/pci.h>
26
27#include <asm/io.h>
28#include <sound/core.h>
29#include "mixart.h"
30#include "mixart_hwdep.h"
31#include "mixart_core.h"
32
33
34#define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */
35
36#define MSG_DESCRIPTOR_SIZE 0x24
37#define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4)
38
39#define MSG_DEFAULT_SIZE 512
40
41#define MSG_TYPE_MASK 0x00000003 /* mask for following types */
42#define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */
43#define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */
44#define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */
45#define MSG_TYPE_ANSWER 3 /* embedded -> driver */
46#define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */
47
48
49static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
50{
51 /* read the message frame fifo */
52 u32 headptr, tailptr;
53
54 tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
55 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));
56
57 if (tailptr == headptr)
58 return 0; /* no message posted */
59
60 if (tailptr < MSG_OUTBOUND_POST_STACK)
61 return 0; /* error */
62 if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE)
63 return 0; /* error */
64
65 *msg_frame = readl_be(MIXART_MEM(mgr, tailptr));
66
67 /* increment the tail index */
68 tailptr += 4;
69 if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
70 tailptr = MSG_OUTBOUND_POST_STACK;
71 writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
72
73 return 1;
74}
75
76static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
77 u32 msg_frame_address )
78{
79 unsigned long flags;
80 u32 headptr;
81 u32 size;
82 int err;
83#ifndef __BIG_ENDIAN
84 unsigned int i;
85#endif
86
87 spin_lock_irqsave(&mgr->msg_lock, flags);
88 err = 0;
89
90 /* copy message descriptor from miXart to driver */
91 size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */
92 resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */
93 resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */
94 resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */
95
96 if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
97 err = -EINVAL;
98 dev_err(&mgr->pci->dev,
99 "problem with response size = %d\n", size);
100 goto _clean_exit;
101 }
102 size -= MSG_DESCRIPTOR_SIZE;
103
104 memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
105 resp->size = size;
106
107 /* swap if necessary */
108#ifndef __BIG_ENDIAN
109 size /= 4; /* u32 size */
110 for(i=0; i < size; i++) {
111 ((u32*)resp->data)[i] = be32_to_cpu(((u32*)resp->data)[i]);
112 }
113#endif
114
115 /*
116 * free message frame address
117 */
118 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
119
120 if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
121 err = -EINVAL;
122 goto _clean_exit;
123 }
124
125 /* give address back to outbound fifo */
126 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
127
128 /* increment the outbound free head */
129 headptr += 4;
130 if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
131 headptr = MSG_OUTBOUND_FREE_STACK;
132
133 writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
134
135 _clean_exit:
136 spin_unlock_irqrestore(&mgr->msg_lock, flags);
137
138 return err;
139}
140
141
142/*
143 * send a message to miXart. return: the msg_frame used for this message
144 */
145/* call with mgr->msg_lock held! */
146static int send_msg( struct mixart_mgr *mgr,
147 struct mixart_msg *msg,
148 int max_answersize,
149 int mark_pending,
150 u32 *msg_event)
151{
152 u32 headptr, tailptr;
153 u32 msg_frame_address;
154 int err, i;
155
156 if (snd_BUG_ON(msg->size % 4))
157 return -EINVAL;
158
159 err = 0;
160
161 /* get message frame address */
162 tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
163 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));
164
165 if (tailptr == headptr) {
166 dev_err(&mgr->pci->dev, "error: no message frame available\n");
167 return -EBUSY;
168 }
169
170 if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
171 return -EINVAL;
172 }
173
174 msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
175 writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */
176
177 /* increment the inbound free tail */
178 tailptr += 4;
179 if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
180 tailptr = MSG_INBOUND_FREE_STACK;
181
182 writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
183
184 /* TODO : use memcpy_toio() with intermediate buffer to copy the message */
185
186 /* copy message descriptor to card memory */
187 writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */
188 writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */
189 writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */
190 writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
191 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
192 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
193 writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
194 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
195 writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
196 writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */
197
198 /* copy message data to card memory */
199 for( i=0; i < msg->size; i+=4 ) {
200 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) );
201 }
202
203 if( mark_pending ) {
204 if( *msg_event ) {
205 /* the pending event is the notification we wait for ! */
206 mgr->pending_event = *msg_event;
207 }
208 else {
209 /* the pending event is the answer we wait for (same address than the request)! */
210 mgr->pending_event = msg_frame_address;
211
212 /* copy address back to caller */
213 *msg_event = msg_frame_address;
214 }
215 }
216
217 /* mark the frame as a request (will have an answer) */
218 msg_frame_address |= MSG_TYPE_REQUEST;
219
220 /* post the frame */
221 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
222
223 if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
224 return -EINVAL;
225 }
226
227 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
228
229 /* increment the inbound post head */
230 headptr += 4;
231 if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
232 headptr = MSG_INBOUND_POST_STACK;
233
234 writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
235
236 return 0;
237}
238
239
240int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
241{
242 struct mixart_msg resp;
243 u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
244 int err;
245 wait_queue_t wait;
246 long timeout;
247
248 mutex_lock(&mgr->msg_mutex);
249
250 init_waitqueue_entry(&wait, current);
251
252 spin_lock_irq(&mgr->msg_lock);
253 /* send the message */
254 err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */
255 if (err) {
256 spin_unlock_irq(&mgr->msg_lock);
257 mutex_unlock(&mgr->msg_mutex);
258 return err;
259 }
260
261 set_current_state(TASK_UNINTERRUPTIBLE);
262 add_wait_queue(&mgr->msg_sleep, &wait);
263 spin_unlock_irq(&mgr->msg_lock);
264 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
265 remove_wait_queue(&mgr->msg_sleep, &wait);
266
267 if (! timeout) {
268 /* error - no ack */
269 mutex_unlock(&mgr->msg_mutex);
270 dev_err(&mgr->pci->dev,
271 "error: no response on msg %x\n", msg_frame);
272 return -EIO;
273 }
274
275 /* retrieve the answer into the same struct mixart_msg */
276 resp.message_id = 0;
277 resp.uid = (struct mixart_uid){0,0};
278 resp.data = resp_data;
279 resp.size = max_resp_size;
280
281 err = get_msg(mgr, &resp, msg_frame);
282
283 if( request->message_id != resp.message_id )
284 dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");
285
286 mutex_unlock(&mgr->msg_mutex);
287 return err;
288}
289
290
291int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
292 struct mixart_msg *request, u32 notif_event)
293{
294 int err;
295 wait_queue_t wait;
296 long timeout;
297
298 if (snd_BUG_ON(!notif_event))
299 return -EINVAL;
300 if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY))
301 return -EINVAL;
302 if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
303 return -EINVAL;
304
305 mutex_lock(&mgr->msg_mutex);
306
307 init_waitqueue_entry(&wait, current);
308
309 spin_lock_irq(&mgr->msg_lock);
310 /* send the message */
311 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */
312 if(err) {
313 spin_unlock_irq(&mgr->msg_lock);
314 mutex_unlock(&mgr->msg_mutex);
315 return err;
316 }
317
318 set_current_state(TASK_UNINTERRUPTIBLE);
319 add_wait_queue(&mgr->msg_sleep, &wait);
320 spin_unlock_irq(&mgr->msg_lock);
321 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
322 remove_wait_queue(&mgr->msg_sleep, &wait);
323
324 if (! timeout) {
325 /* error - no ack */
326 mutex_unlock(&mgr->msg_mutex);
327 dev_err(&mgr->pci->dev,
328 "error: notification %x not received\n", notif_event);
329 return -EIO;
330 }
331
332 mutex_unlock(&mgr->msg_mutex);
333 return 0;
334}
335
336
337int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
338{
339 u32 message_frame;
340 unsigned long flags;
341 int err;
342
343 /* just send the message (do not mark it as a pending one) */
344 spin_lock_irqsave(&mgr->msg_lock, flags);
345 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
346 spin_unlock_irqrestore(&mgr->msg_lock, flags);
347
348 /* the answer will be handled by snd_struct mixart_msgasklet() */
349 atomic_inc(&mgr->msg_processed);
350
351 return err;
352}
353
354
355/* common buffer of tasklet and interrupt to send/receive messages */
356static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
357
358
359void snd_mixart_msg_tasklet(unsigned long arg)
360{
361 struct mixart_mgr *mgr = ( struct mixart_mgr*)(arg);
362 struct mixart_msg resp;
363 u32 msg, addr, type;
364 int err;
365
366 spin_lock(&mgr->lock);
367
368 while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
369 msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
370 mgr->msg_fifo_readptr++;
371 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;
372
373 /* process the message ... */
374 addr = msg & ~MSG_TYPE_MASK;
375 type = msg & MSG_TYPE_MASK;
376
377 switch (type) {
378 case MSG_TYPE_ANSWER:
379 /* answer to a message on that we did not wait for (send_msg_nonblock) */
380 resp.message_id = 0;
381 resp.data = mixart_msg_data;
382 resp.size = sizeof(mixart_msg_data);
383 err = get_msg(mgr, &resp, addr);
384 if( err < 0 ) {
385 dev_err(&mgr->pci->dev,
386 "tasklet: error(%d) reading mf %x\n",
387 err, msg);
388 break;
389 }
390
391 switch(resp.message_id) {
392 case MSG_STREAM_START_INPUT_STAGE_PACKET:
393 case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
394 case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
395 case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
396 if(mixart_msg_data[0])
397 dev_err(&mgr->pci->dev,
398 "tasklet : error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
399 mixart_msg_data[0]);
400 break;
401 default:
402 dev_dbg(&mgr->pci->dev,
403 "tasklet received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
404 msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
405 break;
406 }
407 break;
408 case MSG_TYPE_NOTIFY:
409 /* msg contains no address ! do not get_msg() ! */
410 case MSG_TYPE_COMMAND:
411 /* get_msg() necessary */
412 default:
413 dev_err(&mgr->pci->dev,
414 "tasklet doesn't know what to do with message %x\n",
415 msg);
416 } /* switch type */
417
418 /* decrement counter */
419 atomic_dec(&mgr->msg_processed);
420
421 } /* while there is a msg in fifo */
422
423 spin_unlock(&mgr->lock);
424}
425
426
427irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
428{
429 struct mixart_mgr *mgr = dev_id;
430 int err;
431 struct mixart_msg resp;
432
433 u32 msg;
434 u32 it_reg;
435
436 spin_lock(&mgr->lock);
437
438 it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
439 if( !(it_reg & MIXART_OIDI) ) {
440 /* this device did not cause the interrupt */
441 spin_unlock(&mgr->lock);
442 return IRQ_NONE;
443 }
444
445 /* mask all interrupts */
446 writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
447
448 /* outdoorbell register clear */
449 it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
450 writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
451
452 /* clear interrupt */
453 writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
454
455 /* process interrupt */
456 while (retrieve_msg_frame(mgr, &msg)) {
457
458 switch (msg & MSG_TYPE_MASK) {
459 case MSG_TYPE_COMMAND:
460 resp.message_id = 0;
461 resp.data = mixart_msg_data;
462 resp.size = sizeof(mixart_msg_data);
463 err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
464 if( err < 0 ) {
465 dev_err(&mgr->pci->dev,
466 "interrupt: error(%d) reading mf %x\n",
467 err, msg);
468 break;
469 }
470
471 if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
472 int i;
473 struct mixart_timer_notify *notify;
474 notify = (struct mixart_timer_notify *)mixart_msg_data;
475
476 for(i=0; i<notify->stream_count; i++) {
477
478 u32 buffer_id = notify->streams[i].buffer_id;
479 unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
480 unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */
481 unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */
482 unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */
483
484 struct snd_mixart *chip = mgr->chip[chip_number];
485 struct mixart_stream *stream;
486
487 if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
488 dev_err(&mgr->pci->dev,
489 "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
490 buffer_id, notify->streams[i].sample_pos_low_part);
491 break;
492 }
493
494 if (is_capture)
495 stream = &chip->capture_stream[pcm_number];
496 else
497 stream = &chip->playback_stream[pcm_number][sub_number];
498
499 if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
500 struct snd_pcm_runtime *runtime = stream->substream->runtime;
501 int elapsed = 0;
502 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
503 sample_count |= notify->streams[i].sample_pos_low_part;
504
505 while (1) {
506 u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size;
507
508 if (new_elapse_pos > sample_count) {
509 break; /* while */
510 }
511 else {
512 elapsed = 1;
513 stream->buf_periods++;
514 if (stream->buf_periods >= runtime->periods)
515 stream->buf_periods = 0;
516
517 stream->abs_period_elapsed = new_elapse_pos;
518 }
519 }
520 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
521
522 if(elapsed) {
523 spin_unlock(&mgr->lock);
524 snd_pcm_period_elapsed(stream->substream);
525 spin_lock(&mgr->lock);
526 }
527 }
528 }
529 break;
530 }
531 if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
532 if(resp.size > 1) {
533#ifndef __BIG_ENDIAN
534 /* Traces are text: the swapped msg_data has to be swapped back ! */
535 int i;
536 for(i=0; i<(resp.size/4); i++) {
537 (mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
538 }
539#endif
540 ((char*)mixart_msg_data)[resp.size - 1] = 0;
541 dev_dbg(&mgr->pci->dev,
542 "MIXART TRACE : %s\n",
543 (char *)mixart_msg_data);
544 }
545 break;
546 }
547
548 dev_dbg(&mgr->pci->dev, "command %x not handled\n",
549 resp.message_id);
550 break;
551
552 case MSG_TYPE_NOTIFY:
553 if(msg & MSG_CANCEL_NOTIFY_MASK) {
554 msg &= ~MSG_CANCEL_NOTIFY_MASK;
555 dev_err(&mgr->pci->dev,
556 "canceled notification %x !\n", msg);
557 }
558 /* no break, continue ! */
559 case MSG_TYPE_ANSWER:
560 /* answer or notification to a message we are waiting for*/
561 spin_lock(&mgr->msg_lock);
562 if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
563 wake_up(&mgr->msg_sleep);
564 mgr->pending_event = 0;
565 }
566 /* answer to a message we did't want to wait for */
567 else {
568 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
569 mgr->msg_fifo_writeptr++;
570 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
571 tasklet_schedule(&mgr->msg_taskq);
572 }
573 spin_unlock(&mgr->msg_lock);
574 break;
575 case MSG_TYPE_REQUEST:
576 default:
577 dev_dbg(&mgr->pci->dev,
578 "interrupt received request %x\n", msg);
579 /* TODO : are there things to do here ? */
580 break;
581 } /* switch on msg type */
582 } /* while there are msgs */
583
584 /* allow interrupt again */
585 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
586
587 spin_unlock(&mgr->lock);
588
589 return IRQ_HANDLED;
590}
591
592
593void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
594{
595 writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) );
596 writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) );
597
598 /* allow outbound messagebox to generate interrupts */
599 if(mgr->irq >= 0) {
600 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
601 }
602 return;
603}
604
605void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
606{
607 /* no more interrupts on outbound messagebox */
608 writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
609 return;
610}
611
612void snd_mixart_reset_board(struct mixart_mgr *mgr)
613{
614 /* reset miXart */
615 writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) );
616 return;
617}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for Digigram miXart soundcards
4 *
5 * low level interface with interrupt handling and mail box implementation
6 *
7 * Copyright (c) 2003 by Digigram <alsa@digigram.com>
8 */
9
10#include <linux/interrupt.h>
11#include <linux/mutex.h>
12#include <linux/pci.h>
13#include <linux/io.h>
14
15#include <sound/core.h>
16#include "mixart.h"
17#include "mixart_hwdep.h"
18#include "mixart_core.h"
19
20
21#define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */
22
23#define MSG_DESCRIPTOR_SIZE 0x24
24#define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4)
25
26#define MSG_TYPE_MASK 0x00000003 /* mask for following types */
27#define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */
28#define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */
29#define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */
30#define MSG_TYPE_ANSWER 3 /* embedded -> driver */
31#define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */
32
33
34static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
35{
36 /* read the message frame fifo */
37 u32 headptr, tailptr;
38
39 tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
40 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));
41
42 if (tailptr == headptr)
43 return 0; /* no message posted */
44
45 if (tailptr < MSG_OUTBOUND_POST_STACK)
46 return 0; /* error */
47 if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE)
48 return 0; /* error */
49
50 *msg_frame = readl_be(MIXART_MEM(mgr, tailptr));
51
52 /* increment the tail index */
53 tailptr += 4;
54 if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
55 tailptr = MSG_OUTBOUND_POST_STACK;
56 writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
57
58 return 1;
59}
60
61static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
62 u32 msg_frame_address )
63{
64 u32 headptr;
65 u32 size;
66 int err;
67#ifndef __BIG_ENDIAN
68 unsigned int i;
69#endif
70
71 err = 0;
72
73 /* copy message descriptor from miXart to driver */
74 size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */
75 resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */
76 resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */
77 resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */
78
79 if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
80 err = -EINVAL;
81 dev_err(&mgr->pci->dev,
82 "problem with response size = %d\n", size);
83 goto _clean_exit;
84 }
85 size -= MSG_DESCRIPTOR_SIZE;
86
87 memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
88 resp->size = size;
89
90 /* swap if necessary */
91#ifndef __BIG_ENDIAN
92 size /= 4; /* u32 size */
93 for(i=0; i < size; i++) {
94 ((u32*)resp->data)[i] = be32_to_cpu(((__be32*)resp->data)[i]);
95 }
96#endif
97
98 /*
99 * free message frame address
100 */
101 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
102
103 if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
104 err = -EINVAL;
105 goto _clean_exit;
106 }
107
108 /* give address back to outbound fifo */
109 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
110
111 /* increment the outbound free head */
112 headptr += 4;
113 if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
114 headptr = MSG_OUTBOUND_FREE_STACK;
115
116 writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
117
118 _clean_exit:
119 return err;
120}
121
122
123/*
124 * send a message to miXart. return: the msg_frame used for this message
125 */
126/* call with mgr->msg_lock held! */
127static int send_msg( struct mixart_mgr *mgr,
128 struct mixart_msg *msg,
129 int max_answersize,
130 int mark_pending,
131 u32 *msg_event)
132{
133 u32 headptr, tailptr;
134 u32 msg_frame_address;
135 int i;
136
137 if (snd_BUG_ON(msg->size % 4))
138 return -EINVAL;
139
140 /* get message frame address */
141 tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
142 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));
143
144 if (tailptr == headptr) {
145 dev_err(&mgr->pci->dev, "error: no message frame available\n");
146 return -EBUSY;
147 }
148
149 if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
150 return -EINVAL;
151 }
152
153 msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
154 writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */
155
156 /* increment the inbound free tail */
157 tailptr += 4;
158 if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
159 tailptr = MSG_INBOUND_FREE_STACK;
160
161 writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
162
163 /* TODO : use memcpy_toio() with intermediate buffer to copy the message */
164
165 /* copy message descriptor to card memory */
166 writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */
167 writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */
168 writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */
169 writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
170 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
171 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
172 writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
173 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
174 writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
175 writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */
176
177 /* copy message data to card memory */
178 for( i=0; i < msg->size; i+=4 ) {
179 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) );
180 }
181
182 if( mark_pending ) {
183 if( *msg_event ) {
184 /* the pending event is the notification we wait for ! */
185 mgr->pending_event = *msg_event;
186 }
187 else {
188 /* the pending event is the answer we wait for (same address than the request)! */
189 mgr->pending_event = msg_frame_address;
190
191 /* copy address back to caller */
192 *msg_event = msg_frame_address;
193 }
194 }
195
196 /* mark the frame as a request (will have an answer) */
197 msg_frame_address |= MSG_TYPE_REQUEST;
198
199 /* post the frame */
200 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
201
202 if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
203 return -EINVAL;
204 }
205
206 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
207
208 /* increment the inbound post head */
209 headptr += 4;
210 if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
211 headptr = MSG_INBOUND_POST_STACK;
212
213 writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
214
215 return 0;
216}
217
218
219int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
220{
221 struct mixart_msg resp;
222 u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
223 int err;
224 wait_queue_entry_t wait;
225 long timeout;
226
227 init_waitqueue_entry(&wait, current);
228
229 mutex_lock(&mgr->msg_lock);
230 /* send the message */
231 err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */
232 if (err) {
233 mutex_unlock(&mgr->msg_lock);
234 return err;
235 }
236
237 set_current_state(TASK_UNINTERRUPTIBLE);
238 add_wait_queue(&mgr->msg_sleep, &wait);
239 mutex_unlock(&mgr->msg_lock);
240 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
241 remove_wait_queue(&mgr->msg_sleep, &wait);
242
243 if (! timeout) {
244 /* error - no ack */
245 dev_err(&mgr->pci->dev,
246 "error: no response on msg %x\n", msg_frame);
247 return -EIO;
248 }
249
250 /* retrieve the answer into the same struct mixart_msg */
251 resp.message_id = 0;
252 resp.uid = (struct mixart_uid){0,0};
253 resp.data = resp_data;
254 resp.size = max_resp_size;
255
256 mutex_lock(&mgr->msg_lock);
257 err = get_msg(mgr, &resp, msg_frame);
258 mutex_unlock(&mgr->msg_lock);
259
260 if( request->message_id != resp.message_id )
261 dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");
262
263 return err;
264}
265
266
267int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
268 struct mixart_msg *request, u32 notif_event)
269{
270 int err;
271 wait_queue_entry_t wait;
272 long timeout;
273
274 if (snd_BUG_ON(!notif_event))
275 return -EINVAL;
276 if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY))
277 return -EINVAL;
278 if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
279 return -EINVAL;
280
281 init_waitqueue_entry(&wait, current);
282
283 mutex_lock(&mgr->msg_lock);
284 /* send the message */
285 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */
286 if(err) {
287 mutex_unlock(&mgr->msg_lock);
288 return err;
289 }
290
291 set_current_state(TASK_UNINTERRUPTIBLE);
292 add_wait_queue(&mgr->msg_sleep, &wait);
293 mutex_unlock(&mgr->msg_lock);
294 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
295 remove_wait_queue(&mgr->msg_sleep, &wait);
296
297 if (! timeout) {
298 /* error - no ack */
299 dev_err(&mgr->pci->dev,
300 "error: notification %x not received\n", notif_event);
301 return -EIO;
302 }
303
304 return 0;
305}
306
307
308int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
309{
310 u32 message_frame;
311 int err;
312
313 /* just send the message (do not mark it as a pending one) */
314 mutex_lock(&mgr->msg_lock);
315 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
316 mutex_unlock(&mgr->msg_lock);
317
318 /* the answer will be handled by snd_struct mixart_msgasklet() */
319 atomic_inc(&mgr->msg_processed);
320
321 return err;
322}
323
324
325/* common buffer of interrupt to send/receive messages */
326static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
327
328
329static void snd_mixart_process_msg(struct mixart_mgr *mgr)
330{
331 struct mixart_msg resp;
332 u32 msg, addr, type;
333 int err;
334
335 while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
336 msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
337 mgr->msg_fifo_readptr++;
338 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;
339
340 /* process the message ... */
341 addr = msg & ~MSG_TYPE_MASK;
342 type = msg & MSG_TYPE_MASK;
343
344 switch (type) {
345 case MSG_TYPE_ANSWER:
346 /* answer to a message on that we did not wait for (send_msg_nonblock) */
347 resp.message_id = 0;
348 resp.data = mixart_msg_data;
349 resp.size = sizeof(mixart_msg_data);
350 err = get_msg(mgr, &resp, addr);
351 if( err < 0 ) {
352 dev_err(&mgr->pci->dev,
353 "error(%d) reading mf %x\n",
354 err, msg);
355 break;
356 }
357
358 switch(resp.message_id) {
359 case MSG_STREAM_START_INPUT_STAGE_PACKET:
360 case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
361 case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
362 case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
363 if(mixart_msg_data[0])
364 dev_err(&mgr->pci->dev,
365 "error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
366 mixart_msg_data[0]);
367 break;
368 default:
369 dev_dbg(&mgr->pci->dev,
370 "received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
371 msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
372 break;
373 }
374 break;
375 case MSG_TYPE_NOTIFY:
376 /* msg contains no address ! do not get_msg() ! */
377 case MSG_TYPE_COMMAND:
378 /* get_msg() necessary */
379 default:
380 dev_err(&mgr->pci->dev,
381 "doesn't know what to do with message %x\n",
382 msg);
383 } /* switch type */
384
385 /* decrement counter */
386 atomic_dec(&mgr->msg_processed);
387
388 } /* while there is a msg in fifo */
389}
390
391
392irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
393{
394 struct mixart_mgr *mgr = dev_id;
395 u32 it_reg;
396
397 it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
398 if( !(it_reg & MIXART_OIDI) ) {
399 /* this device did not cause the interrupt */
400 return IRQ_NONE;
401 }
402
403 /* mask all interrupts */
404 writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
405
406 /* outdoorbell register clear */
407 it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
408 writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
409
410 /* clear interrupt */
411 writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
412
413 return IRQ_WAKE_THREAD;
414}
415
416irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
417{
418 struct mixart_mgr *mgr = dev_id;
419 int err;
420 struct mixart_msg resp;
421 u32 msg;
422
423 mutex_lock(&mgr->lock);
424 /* process interrupt */
425 while (retrieve_msg_frame(mgr, &msg)) {
426
427 switch (msg & MSG_TYPE_MASK) {
428 case MSG_TYPE_COMMAND:
429 resp.message_id = 0;
430 resp.data = mixart_msg_data;
431 resp.size = sizeof(mixart_msg_data);
432 err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
433 if( err < 0 ) {
434 dev_err(&mgr->pci->dev,
435 "interrupt: error(%d) reading mf %x\n",
436 err, msg);
437 break;
438 }
439
440 if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
441 int i;
442 struct mixart_timer_notify *notify;
443 notify = (struct mixart_timer_notify *)mixart_msg_data;
444
445 BUILD_BUG_ON(sizeof(notify) > sizeof(mixart_msg_data));
446 if (snd_BUG_ON(notify->stream_count > ARRAY_SIZE(notify->streams)))
447 break;
448 for(i=0; i<notify->stream_count; i++) {
449
450 u32 buffer_id = notify->streams[i].buffer_id;
451 unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
452 unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */
453 unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */
454 unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */
455
456 struct snd_mixart *chip = mgr->chip[chip_number];
457 struct mixart_stream *stream;
458
459 if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
460 dev_err(&mgr->pci->dev,
461 "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
462 buffer_id, notify->streams[i].sample_pos_low_part);
463 break;
464 }
465
466 if (is_capture)
467 stream = &chip->capture_stream[pcm_number];
468 else
469 stream = &chip->playback_stream[pcm_number][sub_number];
470
471 if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
472 struct snd_pcm_runtime *runtime = stream->substream->runtime;
473 int elapsed = 0;
474 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
475 sample_count |= notify->streams[i].sample_pos_low_part;
476
477 while (1) {
478 u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size;
479
480 if (new_elapse_pos > sample_count) {
481 break; /* while */
482 }
483 else {
484 elapsed = 1;
485 stream->buf_periods++;
486 if (stream->buf_periods >= runtime->periods)
487 stream->buf_periods = 0;
488
489 stream->abs_period_elapsed = new_elapse_pos;
490 }
491 }
492 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
493
494 if(elapsed) {
495 mutex_unlock(&mgr->lock);
496 snd_pcm_period_elapsed(stream->substream);
497 mutex_lock(&mgr->lock);
498 }
499 }
500 }
501 break;
502 }
503 if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
504 if(resp.size > 1) {
505#ifndef __BIG_ENDIAN
506 /* Traces are text: the swapped msg_data has to be swapped back ! */
507 int i;
508 for(i=0; i<(resp.size/4); i++) {
509 ((__be32*)mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
510 }
511#endif
512 ((char*)mixart_msg_data)[resp.size - 1] = 0;
513 dev_dbg(&mgr->pci->dev,
514 "MIXART TRACE : %s\n",
515 (char *)mixart_msg_data);
516 }
517 break;
518 }
519
520 dev_dbg(&mgr->pci->dev, "command %x not handled\n",
521 resp.message_id);
522 break;
523
524 case MSG_TYPE_NOTIFY:
525 if(msg & MSG_CANCEL_NOTIFY_MASK) {
526 msg &= ~MSG_CANCEL_NOTIFY_MASK;
527 dev_err(&mgr->pci->dev,
528 "canceled notification %x !\n", msg);
529 }
530 fallthrough;
531 case MSG_TYPE_ANSWER:
532 /* answer or notification to a message we are waiting for*/
533 mutex_lock(&mgr->msg_lock);
534 if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
535 wake_up(&mgr->msg_sleep);
536 mgr->pending_event = 0;
537 }
538 /* answer to a message we did't want to wait for */
539 else {
540 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
541 mgr->msg_fifo_writeptr++;
542 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
543 snd_mixart_process_msg(mgr);
544 }
545 mutex_unlock(&mgr->msg_lock);
546 break;
547 case MSG_TYPE_REQUEST:
548 default:
549 dev_dbg(&mgr->pci->dev,
550 "interrupt received request %x\n", msg);
551 /* TODO : are there things to do here ? */
552 break;
553 } /* switch on msg type */
554 } /* while there are msgs */
555
556 /* allow interrupt again */
557 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
558
559 mutex_unlock(&mgr->lock);
560
561 return IRQ_HANDLED;
562}
563
564
565void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
566{
567 writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) );
568 writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) );
569
570 /* allow outbound messagebox to generate interrupts */
571 if(mgr->irq >= 0) {
572 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
573 }
574 return;
575}
576
577void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
578{
579 /* no more interrupts on outbound messagebox */
580 writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
581 return;
582}
583
584void snd_mixart_reset_board(struct mixart_mgr *mgr)
585{
586 /* reset miXart */
587 writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) );
588 return;
589}