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