1 /* arch/arm/mach-msm/qdsp5/audio_mp3.c
3 * mp3 audio output device
5 * Copyright (C) 2008 Google, Inc.
6 * Copyright (C) 2008 HTC Corporation
8 * This software is licensed under the terms of the GNU General Public
9 * License version 2, as published by the Free Software Foundation, and
10 * may be copied, distributed, and modified under those terms.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #include <linux/module.h>
21 #include <linux/miscdevice.h>
22 #include <linux/uaccess.h>
23 #include <linux/kthread.h>
24 #include <linux/wait.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/gfp.h>
28 #include <linux/delay.h>
30 #include <asm/atomic.h>
31 #include <asm/ioctls.h>
32 #include <mach/msm_adsp.h>
34 #include <linux/msm_audio.h>
38 #include <mach/qdsp5/qdsp5audppcmdi.h>
39 #include <mach/qdsp5/qdsp5audppmsg.h>
40 #include <mach/qdsp5/qdsp5audplaycmdi.h>
41 #include <mach/qdsp5/qdsp5audplaymsg.h>
43 /* for queue ids - should be relative to module number*/
47 #define dprintk(format, arg...) \
48 printk(KERN_DEBUG format, ## arg)
50 #define dprintk(format, arg...) do {} while (0)
53 /* Size must be power of 2 */
54 #define BUFSZ_MAX 32768
55 #define BUFSZ_MIN 4096
56 #define DMASZ_MAX (BUFSZ_MAX * 2)
57 #define DMASZ_MIN (BUFSZ_MIN * 2)
59 #define AUDPLAY_INVALID_READ_PTR_OFFSET 0xFFFF
60 #define AUDDEC_DEC_MP3 2
62 #define PCM_BUFSZ_MIN 4800 /* Hold one stereo MP3 frame */
63 #define PCM_BUF_MAX_COUNT 5 /* DSP only accepts 5 buffers at most
64 but support 2 buffers currently */
65 #define ROUTING_MODE_FTRT 1
66 #define ROUTING_MODE_RT 2
67 /* Decoder status received from AUDPPTASK */
68 #define AUDPP_DEC_STATUS_SLEEP 0
69 #define AUDPP_DEC_STATUS_INIT 1
70 #define AUDPP_DEC_STATUS_CFG 2
71 #define AUDPP_DEC_STATUS_PLAY 3
76 unsigned used
; /* Input usage actual DSP produced PCM size */
87 uint8_t out_needed
; /* number of buffers the dsp is waiting for */
93 struct mutex write_lock
;
94 wait_queue_head_t write_wait
;
96 /* Host PCM section */
97 struct buffer in
[PCM_BUF_MAX_COUNT
];
98 struct mutex read_lock
;
99 wait_queue_head_t read_wait
; /* Wait queue for read */
100 char *read_data
; /* pointer to reader buffer */
101 dma_addr_t read_phys
; /* physical address of reader buffer */
102 uint8_t read_next
; /* index to input buffers to be read next */
103 uint8_t fill_next
; /* index to buffer that DSP should be filling */
104 uint8_t pcm_buf_count
; /* number of pcm buffer allocated */
105 /* ---- End of Host PCM section */
107 struct msm_adsp_module
*audplay
;
109 /* configuration to use on next enable */
110 uint32_t out_sample_rate
;
111 uint32_t out_channel_mode
;
113 struct audmgr audmgr
;
115 /* data allocated for various buffers */
119 int rflush
; /* Read flush */
120 int wflush
; /* Write flush */
124 int stopped
; /* set when stopped, cleared on flush */
128 int reserved
; /* A byte is being reserved */
129 char rsv_byte
; /* Handle odd length user data */
134 uint32_t read_ptr_offset
;
137 static int auddec_dsp_config(struct audio
*audio
, int enable
);
138 static void audpp_cmd_cfg_adec_params(struct audio
*audio
);
139 static void audpp_cmd_cfg_routing_mode(struct audio
*audio
);
140 static void audplay_send_data(struct audio
*audio
, unsigned needed
);
141 static void audplay_config_hostpcm(struct audio
*audio
);
142 static void audplay_buffer_refresh(struct audio
*audio
);
143 static void audio_dsp_event(void *private, unsigned id
, uint16_t *msg
);
145 /* must be called with audio->lock held */
146 static int audio_enable(struct audio
*audio
)
148 struct audmgr_config cfg
;
151 pr_info("audio_enable()\n");
157 audio
->out_needed
= 0;
159 cfg
.tx_rate
= RPC_AUD_DEF_SAMPLE_RATE_NONE
;
160 cfg
.rx_rate
= RPC_AUD_DEF_SAMPLE_RATE_48000
;
161 cfg
.def_method
= RPC_AUD_DEF_METHOD_PLAYBACK
;
162 cfg
.codec
= RPC_AUD_DEF_CODEC_MP3
;
163 cfg
.snd_method
= RPC_SND_METHOD_MIDI
;
165 rc
= audmgr_enable(&audio
->audmgr
, &cfg
);
169 if (msm_adsp_enable(audio
->audplay
)) {
170 pr_err("audio: msm_adsp_enable(audplay) failed\n");
171 audmgr_disable(&audio
->audmgr
);
175 if (audpp_enable(audio
->dec_id
, audio_dsp_event
, audio
)) {
176 pr_err("audio: audpp_enable() failed\n");
177 msm_adsp_disable(audio
->audplay
);
178 audmgr_disable(&audio
->audmgr
);
186 /* must be called with audio->lock held */
187 static int audio_disable(struct audio
*audio
)
189 pr_info("audio_disable()\n");
190 if (audio
->enabled
) {
192 auddec_dsp_config(audio
, 0);
193 wake_up(&audio
->write_wait
);
194 wake_up(&audio
->read_wait
);
195 msm_adsp_disable(audio
->audplay
);
196 audpp_disable(audio
->dec_id
, audio
);
197 audmgr_disable(&audio
->audmgr
);
198 audio
->out_needed
= 0;
203 /* ------------------- dsp --------------------- */
204 static void audio_update_pcm_buf_entry(struct audio
*audio
, uint32_t *payload
)
210 audio
->buf_refresh
= 1;
213 spin_lock_irqsave(&audio
->dsp_lock
, flags
);
214 for (index
= 0; index
< payload
[1]; index
++) {
215 if (audio
->in
[audio
->fill_next
].addr
==
216 payload
[2 + index
* 2]) {
217 pr_info("audio_update_pcm_buf_entry: in[%d] ready\n",
219 audio
->in
[audio
->fill_next
].used
=
220 payload
[3 + index
* 2];
221 if ((++audio
->fill_next
) == audio
->pcm_buf_count
)
222 audio
->fill_next
= 0;
226 ("audio_update_pcm_buf_entry: expected=%x ret=%x\n"
227 , audio
->in
[audio
->fill_next
].addr
,
228 payload
[1 + index
* 2]);
232 if (audio
->in
[audio
->fill_next
].used
== 0) {
233 audplay_buffer_refresh(audio
);
235 pr_info("audio_update_pcm_buf_entry: read cannot keep up\n");
236 audio
->buf_refresh
= 1;
238 wake_up(&audio
->read_wait
);
239 spin_unlock_irqrestore(&audio
->dsp_lock
, flags
);
243 static void audplay_dsp_event(void *data
, unsigned id
, size_t len
,
244 void (*getevent
) (void *ptr
, size_t len
))
246 struct audio
*audio
= data
;
248 getevent(msg
, sizeof(msg
));
250 dprintk("audplay_dsp_event: msg_id=%x\n", id
);
253 case AUDPLAY_MSG_DEC_NEEDS_DATA
:
254 audplay_send_data(audio
, 1);
257 case AUDPLAY_MSG_BUFFER_UPDATE
:
258 audio_update_pcm_buf_entry(audio
, msg
);
262 pr_err("unexpected message from decoder \n");
267 static void audio_dsp_event(void *private, unsigned id
, uint16_t *msg
)
269 struct audio
*audio
= private;
272 case AUDPP_MSG_STATUS_MSG
:{
273 unsigned status
= msg
[1];
276 case AUDPP_DEC_STATUS_SLEEP
:
277 pr_info("decoder status: sleep \n");
280 case AUDPP_DEC_STATUS_INIT
:
281 pr_info("decoder status: init \n");
282 audpp_cmd_cfg_routing_mode(audio
);
285 case AUDPP_DEC_STATUS_CFG
:
286 pr_info("decoder status: cfg \n");
288 case AUDPP_DEC_STATUS_PLAY
:
289 pr_info("decoder status: play \n");
290 if (audio
->pcm_feedback
) {
291 audplay_config_hostpcm(audio
);
292 audplay_buffer_refresh(audio
);
296 pr_err("unknown decoder status \n");
301 case AUDPP_MSG_CFG_MSG
:
302 if (msg
[0] == AUDPP_MSG_ENA_ENA
) {
303 pr_info("audio_dsp_event: CFG_MSG ENABLE\n");
304 auddec_dsp_config(audio
, 1);
305 audio
->out_needed
= 0;
307 audpp_set_volume_and_pan(audio
->dec_id
, audio
->volume
,
309 audpp_avsync(audio
->dec_id
, 22050);
310 } else if (msg
[0] == AUDPP_MSG_ENA_DIS
) {
311 pr_info("audio_dsp_event: CFG_MSG DISABLE\n");
312 audpp_avsync(audio
->dec_id
, 0);
315 pr_err("audio_dsp_event: CFG_MSG %d?\n", msg
[0]);
318 case AUDPP_MSG_ROUTING_ACK
:
319 pr_info("audio_dsp_event: ROUTING_ACK mode=%d\n", msg
[1]);
320 audpp_cmd_cfg_adec_params(audio
);
323 case AUDPP_MSG_FLUSH_ACK
:
324 dprintk("%s: FLUSH_ACK\n", __func__
);
327 if (audio
->pcm_feedback
)
328 audplay_buffer_refresh(audio
);
332 pr_err("audio_dsp_event: UNKNOWN (%d)\n", id
);
338 struct msm_adsp_ops audplay_adsp_ops
= {
339 .event
= audplay_dsp_event
,
343 #define audplay_send_queue0(audio, cmd, len) \
344 msm_adsp_write(audio->audplay, QDSP_uPAudPlay0BitStreamCtrlQueue, \
347 static int auddec_dsp_config(struct audio
*audio
, int enable
)
349 audpp_cmd_cfg_dec_type cmd
;
351 memset(&cmd
, 0, sizeof(cmd
));
352 cmd
.cmd_id
= AUDPP_CMD_CFG_DEC_TYPE
;
354 cmd
.dec0_cfg
= AUDPP_CMD_UPDATDE_CFG_DEC
|
355 AUDPP_CMD_ENA_DEC_V
|
358 cmd
.dec0_cfg
= AUDPP_CMD_UPDATDE_CFG_DEC
|
361 return audpp_send_queue1(&cmd
, sizeof(cmd
));
364 static void audpp_cmd_cfg_adec_params(struct audio
*audio
)
366 audpp_cmd_cfg_adec_params_mp3 cmd
;
368 memset(&cmd
, 0, sizeof(cmd
));
369 cmd
.common
.cmd_id
= AUDPP_CMD_CFG_ADEC_PARAMS
;
370 cmd
.common
.length
= AUDPP_CMD_CFG_ADEC_PARAMS_MP3_LEN
;
371 cmd
.common
.dec_id
= audio
->dec_id
;
372 cmd
.common
.input_sampling_frequency
= audio
->out_sample_rate
;
374 audpp_send_queue2(&cmd
, sizeof(cmd
));
377 static void audpp_cmd_cfg_routing_mode(struct audio
*audio
)
379 struct audpp_cmd_routing_mode cmd
;
380 pr_info("audpp_cmd_cfg_routing_mode()\n");
381 memset(&cmd
, 0, sizeof(cmd
));
382 cmd
.cmd_id
= AUDPP_CMD_ROUTING_MODE
;
383 cmd
.object_number
= audio
->dec_id
;
384 if (audio
->pcm_feedback
)
385 cmd
.routing_mode
= ROUTING_MODE_FTRT
;
387 cmd
.routing_mode
= ROUTING_MODE_RT
;
389 audpp_send_queue1(&cmd
, sizeof(cmd
));
392 static int audplay_dsp_send_data_avail(struct audio
*audio
,
393 unsigned idx
, unsigned len
)
395 audplay_cmd_bitstream_data_avail cmd
;
397 cmd
.cmd_id
= AUDPLAY_CMD_BITSTREAM_DATA_AVAIL
;
398 cmd
.decoder_id
= audio
->dec_id
;
399 cmd
.buf_ptr
= audio
->out
[idx
].addr
;
400 cmd
.buf_size
= len
/2;
401 cmd
.partition_number
= 0;
402 return audplay_send_queue0(audio
, &cmd
, sizeof(cmd
));
405 static void audplay_buffer_refresh(struct audio
*audio
)
407 struct audplay_cmd_buffer_refresh refresh_cmd
;
409 refresh_cmd
.cmd_id
= AUDPLAY_CMD_BUFFER_REFRESH
;
410 refresh_cmd
.num_buffers
= 1;
411 refresh_cmd
.buf0_address
= audio
->in
[audio
->fill_next
].addr
;
412 refresh_cmd
.buf0_length
= audio
->in
[audio
->fill_next
].size
-
413 (audio
->in
[audio
->fill_next
].size
% 576); /* Mp3 frame size */
414 refresh_cmd
.buf_read_count
= 0;
415 pr_info("audplay_buffer_fresh: buf0_addr=%x buf0_len=%d\n",
416 refresh_cmd
.buf0_address
, refresh_cmd
.buf0_length
);
417 (void)audplay_send_queue0(audio
, &refresh_cmd
, sizeof(refresh_cmd
));
420 static void audplay_config_hostpcm(struct audio
*audio
)
422 struct audplay_cmd_hpcm_buf_cfg cfg_cmd
;
424 pr_info("audplay_config_hostpcm()\n");
425 cfg_cmd
.cmd_id
= AUDPLAY_CMD_HPCM_BUF_CFG
;
426 cfg_cmd
.max_buffers
= 1;
427 cfg_cmd
.byte_swap
= 0;
428 cfg_cmd
.hostpcm_config
= (0x8000) | (0x4000);
429 cfg_cmd
.feedback_frequency
= 1;
430 cfg_cmd
.partition_number
= 0;
431 (void)audplay_send_queue0(audio
, &cfg_cmd
, sizeof(cfg_cmd
));
435 static void audplay_send_data(struct audio
*audio
, unsigned needed
)
437 struct buffer
*frame
;
440 spin_lock_irqsave(&audio
->dsp_lock
, flags
);
445 audio
->out_needed
= 1;
449 if (needed
&& !audio
->wflush
) {
450 /* We were called from the callback because the DSP
451 * requested more data. Note that the DSP does want
452 * more data, and if a buffer was in-flight, mark it
453 * as available (since the DSP must now be done with
456 audio
->out_needed
= 1;
457 frame
= audio
->out
+ audio
->out_tail
;
458 if (frame
->used
== 0xffffffff) {
459 dprintk("frame %d free\n", audio
->out_tail
);
461 audio
->out_tail
^= 1;
462 wake_up(&audio
->write_wait
);
466 if (audio
->out_needed
) {
467 /* If the DSP currently wants data and we have a
468 * buffer available, we will send it and reset
469 * the needed flag. We'll mark the buffer as in-flight
470 * so that it won't be recycled until the next buffer
474 frame
= audio
->out
+ audio
->out_tail
;
476 BUG_ON(frame
->used
== 0xffffffff);
477 dprintk("frame %d busy\n", audio
->out_tail
);
478 audplay_dsp_send_data_avail(audio
, audio
->out_tail
,
480 frame
->used
= 0xffffffff;
481 audio
->out_needed
= 0;
485 spin_unlock_irqrestore(&audio
->dsp_lock
, flags
);
488 /* ------------------- device --------------------- */
490 static void audio_flush(struct audio
*audio
)
492 audio
->out
[0].used
= 0;
493 audio
->out
[1].used
= 0;
497 atomic_set(&audio
->out_bytes
, 0);
500 static void audio_flush_pcm_buf(struct audio
*audio
)
504 for (index
= 0; index
< PCM_BUF_MAX_COUNT
; index
++)
505 audio
->in
[index
].used
= 0;
507 audio
->read_next
= 0;
508 audio
->fill_next
= 0;
511 static void audio_ioport_reset(struct audio
*audio
)
513 /* Make sure read/write thread are free from
514 * sleep and knowing that system is not able
515 * to process io request at the moment
517 wake_up(&audio
->write_wait
);
518 mutex_lock(&audio
->write_lock
);
520 mutex_unlock(&audio
->write_lock
);
521 wake_up(&audio
->read_wait
);
522 mutex_lock(&audio
->read_lock
);
523 audio_flush_pcm_buf(audio
);
524 mutex_unlock(&audio
->read_lock
);
527 static long audio_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
529 struct audio
*audio
= file
->private_data
;
532 pr_info("audio_ioctl() cmd = %d\n", cmd
);
534 if (cmd
== AUDIO_GET_STATS
) {
535 struct msm_audio_stats stats
;
536 stats
.byte_count
= audpp_avsync_byte_count(audio
->dec_id
);
537 stats
.sample_count
= audpp_avsync_sample_count(audio
->dec_id
);
538 if (copy_to_user((void *) arg
, &stats
, sizeof(stats
)))
542 if (cmd
== AUDIO_SET_VOLUME
) {
544 spin_lock_irqsave(&audio
->dsp_lock
, flags
);
547 audpp_set_volume_and_pan(audio
->dec_id
, arg
, 0);
548 spin_unlock_irqrestore(&audio
->dsp_lock
, flags
);
551 mutex_lock(&audio
->lock
);
554 rc
= audio_enable(audio
);
557 rc
= audio_disable(audio
);
559 audio_ioport_reset(audio
);
563 dprintk("%s: AUDIO_FLUSH\n", __func__
);
566 audio_ioport_reset(audio
);
570 if (audio
->buf_refresh
) {
571 audio
->buf_refresh
= 0;
572 audplay_buffer_refresh(audio
);
576 case AUDIO_SET_CONFIG
: {
577 struct msm_audio_config config
;
578 if (copy_from_user(&config
, (void *) arg
, sizeof(config
))) {
582 if (config
.channel_count
== 1) {
583 config
.channel_count
= AUDPP_CMD_PCM_INTF_MONO_V
;
584 } else if (config
.channel_count
== 2) {
585 config
.channel_count
= AUDPP_CMD_PCM_INTF_STEREO_V
;
590 audio
->out_sample_rate
= config
.sample_rate
;
591 audio
->out_channel_mode
= config
.channel_count
;
595 case AUDIO_GET_CONFIG
: {
596 struct msm_audio_config config
;
597 config
.buffer_size
= (audio
->out_dma_sz
>> 1);
598 config
.buffer_count
= 2;
599 config
.sample_rate
= audio
->out_sample_rate
;
600 if (audio
->out_channel_mode
== AUDPP_CMD_PCM_INTF_MONO_V
) {
601 config
.channel_count
= 1;
603 config
.channel_count
= 2;
605 config
.unused
[0] = 0;
606 config
.unused
[1] = 0;
607 config
.unused
[2] = 0;
608 config
.unused
[3] = 0;
609 if (copy_to_user((void *) arg
, &config
, sizeof(config
))) {
616 case AUDIO_GET_PCM_CONFIG
:{
617 struct msm_audio_pcm_config config
;
618 config
.pcm_feedback
= 0;
619 config
.buffer_count
= PCM_BUF_MAX_COUNT
;
620 config
.buffer_size
= PCM_BUFSZ_MIN
;
621 if (copy_to_user((void *)arg
, &config
,
628 case AUDIO_SET_PCM_CONFIG
:{
629 struct msm_audio_pcm_config config
;
631 (&config
, (void *)arg
, sizeof(config
))) {
635 if ((config
.buffer_count
> PCM_BUF_MAX_COUNT
) ||
636 (config
.buffer_count
== 1))
637 config
.buffer_count
= PCM_BUF_MAX_COUNT
;
639 if (config
.buffer_size
< PCM_BUFSZ_MIN
)
640 config
.buffer_size
= PCM_BUFSZ_MIN
;
642 /* Check if pcm feedback is required */
643 if ((config
.pcm_feedback
) && (!audio
->read_data
)) {
644 pr_info("ioctl: allocate PCM buffer %d\n",
645 config
.buffer_count
*
648 dma_alloc_coherent(NULL
,
653 if (!audio
->read_data
) {
654 pr_err("audio_mp3: malloc pcm buf failed\n");
659 audio
->pcm_feedback
= 1;
660 audio
->buf_refresh
= 0;
661 audio
->pcm_buf_count
=
663 audio
->read_next
= 0;
664 audio
->fill_next
= 0;
667 index
< config
.buffer_count
;
669 audio
->in
[index
].data
=
670 audio
->read_data
+ offset
;
671 audio
->in
[index
].addr
=
672 audio
->read_phys
+ offset
;
673 audio
->in
[index
].size
=
675 audio
->in
[index
].used
= 0;
676 offset
+= config
.buffer_size
;
686 dprintk("%s: AUDIO_PAUSE %ld\n", __func__
, arg
);
687 rc
= audpp_pause(audio
->dec_id
, (int) arg
);
692 mutex_unlock(&audio
->lock
);
696 static ssize_t
audio_read(struct file
*file
, char __user
*buf
, size_t count
,
699 struct audio
*audio
= file
->private_data
;
700 const char __user
*start
= buf
;
703 if (!audio
->pcm_feedback
)
704 return 0; /* PCM feedback disabled. Nothing to read */
706 mutex_lock(&audio
->read_lock
);
707 pr_info("audio_read() %d \n", count
);
709 rc
= wait_event_interruptible(audio
->read_wait
,
710 (audio
->in
[audio
->read_next
].
711 used
> 0) || (audio
->stopped
)
717 if (audio
->stopped
|| audio
->rflush
) {
722 if (count
< audio
->in
[audio
->read_next
].used
) {
723 /* Read must happen in frame boundary. Since
724 * driver does not know frame size, read count
725 * must be greater or equal
726 * to size of PCM samples
728 pr_info("audio_read: no partial frame done reading\n");
731 pr_info("audio_read: read from in[%d]\n",
734 (buf
, audio
->in
[audio
->read_next
].data
,
735 audio
->in
[audio
->read_next
].used
)) {
736 pr_err("audio_read: invalid addr %x \n",
741 count
-= audio
->in
[audio
->read_next
].used
;
742 buf
+= audio
->in
[audio
->read_next
].used
;
743 audio
->in
[audio
->read_next
].used
= 0;
744 if ((++audio
->read_next
) == audio
->pcm_buf_count
)
745 audio
->read_next
= 0;
746 if (audio
->in
[audio
->read_next
].used
== 0)
747 break; /* No data ready at this moment
748 * Exit while loop to prevent
749 * output thread sleep too long
754 /* don't feed output buffer to HW decoder during flushing
755 * buffer refresh command will be sent once flush completes
756 * send buf refresh command here can confuse HW decoder
758 if (audio
->buf_refresh
&& !audio
->rflush
) {
759 audio
->buf_refresh
= 0;
760 pr_info("audio_read: kick start pcm feedback again\n");
761 audplay_buffer_refresh(audio
);
764 mutex_unlock(&audio
->read_lock
);
769 pr_info("audio_read: read %d bytes\n", rc
);
773 static ssize_t
audio_write(struct file
*file
, const char __user
*buf
,
774 size_t count
, loff_t
*pos
)
776 struct audio
*audio
= file
->private_data
;
777 const char __user
*start
= buf
;
778 struct buffer
*frame
;
784 mutex_lock(&audio
->write_lock
);
786 frame
= audio
->out
+ audio
->out_head
;
787 cpy_ptr
= frame
->data
;
789 rc
= wait_event_interruptible(audio
->write_wait
,
795 if (audio
->stopped
|| audio
->wflush
) {
800 if (audio
->reserved
) {
801 dprintk("%s: append reserved byte %x\n",
802 __func__
, audio
->rsv_byte
);
803 *cpy_ptr
= audio
->rsv_byte
;
804 xfer
= (count
> (frame
->size
- 1)) ?
805 frame
->size
- 1 : count
;
810 xfer
= (count
> frame
->size
) ? frame
->size
: count
;
812 if (copy_from_user(cpy_ptr
, buf
, xfer
)) {
819 audio
->rsv_byte
= ((char *) frame
->data
)[dsize
- 1];
820 dprintk("%s: odd length buf reserve last byte %x\n",
821 __func__
, audio
->rsv_byte
);
829 audio
->out_head
^= 1;
831 audplay_send_data(audio
, 0);
834 mutex_unlock(&audio
->write_lock
);
840 static int audio_release(struct inode
*inode
, struct file
*file
)
842 struct audio
*audio
= file
->private_data
;
844 dprintk("audio_release()\n");
846 mutex_lock(&audio
->lock
);
847 audio_disable(audio
);
849 audio_flush_pcm_buf(audio
);
850 msm_adsp_put(audio
->audplay
);
851 audio
->audplay
= NULL
;
854 dma_free_coherent(NULL
, audio
->out_dma_sz
, audio
->data
, audio
->phys
);
856 if (audio
->read_data
!= NULL
) {
857 dma_free_coherent(NULL
,
858 audio
->in
[0].size
* audio
->pcm_buf_count
,
859 audio
->read_data
, audio
->read_phys
);
860 audio
->read_data
= NULL
;
862 audio
->pcm_feedback
= 0;
863 mutex_unlock(&audio
->lock
);
867 static struct audio the_mp3_audio
;
869 static int audio_open(struct inode
*inode
, struct file
*file
)
871 struct audio
*audio
= &the_mp3_audio
;
875 mutex_lock(&audio
->lock
);
878 pr_err("audio: busy\n");
885 while (pmem_sz
>= DMASZ_MIN
) {
886 audio
->data
= dma_alloc_coherent(NULL
, pmem_sz
,
887 &audio
->phys
, GFP_KERNEL
);
890 else if (pmem_sz
== DMASZ_MIN
) {
891 pr_err("audio: could not allocate DMA buffers\n");
898 dprintk("%s: allocated %d bytes DMA buffer\n", __func__
, pmem_sz
);
900 rc
= audmgr_open(&audio
->audmgr
);
902 dma_free_coherent(NULL
, pmem_sz
,
903 audio
->data
, audio
->phys
);
907 rc
= msm_adsp_get("AUDPLAY0TASK", &audio
->audplay
, &audplay_adsp_ops
,
910 pr_err("audio: failed to get audplay0 dsp module\n");
911 dma_free_coherent(NULL
, pmem_sz
,
912 audio
->data
, audio
->phys
);
913 audmgr_close(&audio
->audmgr
);
917 audio
->out_dma_sz
= pmem_sz
;
918 pmem_sz
>>= 1; /* Shift by 1 to get size of ping pong buffer */
920 audio
->out_sample_rate
= 44100;
921 audio
->out_channel_mode
= AUDPP_CMD_PCM_INTF_STEREO_V
;
924 audio
->out
[0].data
= audio
->data
+ 0;
925 audio
->out
[0].addr
= audio
->phys
+ 0;
926 audio
->out
[0].size
= pmem_sz
;
928 audio
->out
[1].data
= audio
->data
+ pmem_sz
;
929 audio
->out
[1].addr
= audio
->phys
+ pmem_sz
;
930 audio
->out
[1].size
= pmem_sz
;
932 audio
->volume
= 0x2000; /* equal to Q13 number 1.0 Unit Gain */
936 file
->private_data
= audio
;
940 mutex_unlock(&audio
->lock
);
944 static struct file_operations audio_mp3_fops
= {
945 .owner
= THIS_MODULE
,
947 .release
= audio_release
,
949 .write
= audio_write
,
950 .unlocked_ioctl
= audio_ioctl
,
951 .llseek
= noop_llseek
,
954 struct miscdevice audio_mp3_misc
= {
955 .minor
= MISC_DYNAMIC_MINOR
,
957 .fops
= &audio_mp3_fops
,
960 static int __init
audio_init(void)
962 mutex_init(&the_mp3_audio
.lock
);
963 mutex_init(&the_mp3_audio
.write_lock
);
964 mutex_init(&the_mp3_audio
.read_lock
);
965 spin_lock_init(&the_mp3_audio
.dsp_lock
);
966 init_waitqueue_head(&the_mp3_audio
.write_wait
);
967 init_waitqueue_head(&the_mp3_audio
.read_wait
);
968 the_mp3_audio
.read_data
= NULL
;
969 return misc_register(&audio_mp3_misc
);
972 device_initcall(audio_init
);