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
retrieve_msg_frame(struct mixart_mgr * mgr,u32 * msg_frame)34 static 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
get_msg(struct mixart_mgr * mgr,struct mixart_msg * resp,u32 msg_frame_address)61 static 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! */
send_msg(struct mixart_mgr * mgr,struct mixart_msg * msg,int max_answersize,int mark_pending,u32 * msg_event)127 static 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
snd_mixart_send_msg(struct mixart_mgr * mgr,struct mixart_msg * request,int max_resp_size,void * resp_data)219 int 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
snd_mixart_send_msg_wait_notif(struct mixart_mgr * mgr,struct mixart_msg * request,u32 notif_event)267 int 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
snd_mixart_send_msg_nonblock(struct mixart_mgr * mgr,struct mixart_msg * request)308 int 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 */
326 static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
327
328
snd_mixart_process_msg(struct mixart_mgr * mgr)329 static 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
snd_mixart_interrupt(int irq,void * dev_id)392 irqreturn_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
snd_mixart_threaded_irq(int irq,void * dev_id)416 irqreturn_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
snd_mixart_init_mailbox(struct mixart_mgr * mgr)565 void 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
snd_mixart_exit_mailbox(struct mixart_mgr * mgr)577 void 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
snd_mixart_reset_board(struct mixart_mgr * mgr)584 void 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 }
590