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