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>
27 #include <linux/delay.h>
29 #include <asm/atomic.h>
30 #include <asm/ioctls.h>
31 #include <mach/msm_adsp.h>
33 #include <linux/msm_audio.h>
37 #include <mach/qdsp5/qdsp5audppcmdi.h>
38 #include <mach/qdsp5/qdsp5audppmsg.h>
39 #include <mach/qdsp5/qdsp5audplaycmdi.h>
40 #include <mach/qdsp5/qdsp5audplaymsg.h>
42 /* for queue ids - should be relative to module number*/
46 #define dprintk(format, arg...) \
47 printk(KERN_DEBUG format, ## arg)
49 #define dprintk(format, arg...) do {} while (0)
52 /* Size must be power of 2 */
53 #define BUFSZ_MAX 32768
54 #define BUFSZ_MIN 4096
55 #define DMASZ_MAX (BUFSZ_MAX * 2)
56 #define DMASZ_MIN (BUFSZ_MIN * 2)
58 #define AUDPLAY_INVALID_READ_PTR_OFFSET 0xFFFF
59 #define AUDDEC_DEC_MP3 2
61 #define PCM_BUFSZ_MIN 4800 /* Hold one stereo MP3 frame */
62 #define PCM_BUF_MAX_COUNT 5 /* DSP only accepts 5 buffers at most
63 but support 2 buffers currently */
64 #define ROUTING_MODE_FTRT 1
65 #define ROUTING_MODE_RT 2
66 /* Decoder status received from AUDPPTASK */
67 #define AUDPP_DEC_STATUS_SLEEP 0
68 #define AUDPP_DEC_STATUS_INIT 1
69 #define AUDPP_DEC_STATUS_CFG 2
70 #define AUDPP_DEC_STATUS_PLAY 3
75 unsigned used
; /* Input usage actual DSP produced PCM size */
86 uint8_t out_needed
; /* number of buffers the dsp is waiting for */
92 struct mutex write_lock
;
93 wait_queue_head_t write_wait
;
95 /* Host PCM section */
96 struct buffer in
[PCM_BUF_MAX_COUNT
];
97 struct mutex read_lock
;
98 wait_queue_head_t read_wait
; /* Wait queue for read */
99 char *read_data
; /* pointer to reader buffer */
100 dma_addr_t read_phys
; /* physical address of reader buffer */
101 uint8_t read_next
; /* index to input buffers to be read next */
102 uint8_t fill_next
; /* index to buffer that DSP should be filling */
103 uint8_t pcm_buf_count
; /* number of pcm buffer allocated */
104 /* ---- End of Host PCM section */
106 struct msm_adsp_module
*audplay
;
108 /* configuration to use on next enable */
109 uint32_t out_sample_rate
;
110 uint32_t out_channel_mode
;
112 struct audmgr audmgr
;
114 /* data allocated for various buffers */
118 int rflush
; /* Read flush */
119 int wflush
; /* Write flush */
123 int stopped
; /* set when stopped, cleared on flush */
127 int reserved
; /* A byte is being reserved */
128 char rsv_byte
; /* Handle odd length user data */
133 uint32_t read_ptr_offset
;
136 static int auddec_dsp_config(struct audio
*audio
, int enable
);
137 static void audpp_cmd_cfg_adec_params(struct audio
*audio
);
138 static void audpp_cmd_cfg_routing_mode(struct audio
*audio
);
139 static void audplay_send_data(struct audio
*audio
, unsigned needed
);
140 static void audplay_config_hostpcm(struct audio
*audio
);
141 static void audplay_buffer_refresh(struct audio
*audio
);
142 static void audio_dsp_event(void *private, unsigned id
, uint16_t *msg
);
144 /* must be called with audio->lock held */
145 static int audio_enable(struct audio
*audio
)
147 struct audmgr_config cfg
;
150 pr_info("audio_enable()\n");
156 audio
->out_needed
= 0;
158 cfg
.tx_rate
= RPC_AUD_DEF_SAMPLE_RATE_NONE
;
159 cfg
.rx_rate
= RPC_AUD_DEF_SAMPLE_RATE_48000
;
160 cfg
.def_method
= RPC_AUD_DEF_METHOD_PLAYBACK
;
161 cfg
.codec
= RPC_AUD_DEF_CODEC_MP3
;
162 cfg
.snd_method
= RPC_SND_METHOD_MIDI
;
164 rc
= audmgr_enable(&audio
->audmgr
, &cfg
);
168 if (msm_adsp_enable(audio
->audplay
)) {
169 pr_err("audio: msm_adsp_enable(audplay) failed\n");
170 audmgr_disable(&audio
->audmgr
);
174 if (audpp_enable(audio
->dec_id
, audio_dsp_event
, audio
)) {
175 pr_err("audio: audpp_enable() failed\n");
176 msm_adsp_disable(audio
->audplay
);
177 audmgr_disable(&audio
->audmgr
);
185 /* must be called with audio->lock held */
186 static int audio_disable(struct audio
*audio
)
188 pr_info("audio_disable()\n");
189 if (audio
->enabled
) {
191 auddec_dsp_config(audio
, 0);
192 wake_up(&audio
->write_wait
);
193 wake_up(&audio
->read_wait
);
194 msm_adsp_disable(audio
->audplay
);
195 audpp_disable(audio
->dec_id
, audio
);
196 audmgr_disable(&audio
->audmgr
);
197 audio
->out_needed
= 0;
202 /* ------------------- dsp --------------------- */
203 static void audio_update_pcm_buf_entry(struct audio
*audio
, uint32_t *payload
)
209 audio
->buf_refresh
= 1;
212 spin_lock_irqsave(&audio
->dsp_lock
, flags
);
213 for (index
= 0; index
< payload
[1]; index
++) {
214 if (audio
->in
[audio
->fill_next
].addr
==
215 payload
[2 + index
* 2]) {
216 pr_info("audio_update_pcm_buf_entry: in[%d] ready\n",
218 audio
->in
[audio
->fill_next
].used
=
219 payload
[3 + index
* 2];
220 if ((++audio
->fill_next
) == audio
->pcm_buf_count
)
221 audio
->fill_next
= 0;
225 ("audio_update_pcm_buf_entry: expected=%x ret=%x\n"
226 , audio
->in
[audio
->fill_next
].addr
,
227 payload
[1 + index
* 2]);
231 if (audio
->in
[audio
->fill_next
].used
== 0) {
232 audplay_buffer_refresh(audio
);
234 pr_info("audio_update_pcm_buf_entry: read cannot keep up\n");
235 audio
->buf_refresh
= 1;
237 wake_up(&audio
->read_wait
);
238 spin_unlock_irqrestore(&audio
->dsp_lock
, flags
);
242 static void audplay_dsp_event(void *data
, unsigned id
, size_t len
,
243 void (*getevent
) (void *ptr
, size_t len
))
245 struct audio
*audio
= data
;
247 getevent(msg
, sizeof(msg
));
249 dprintk("audplay_dsp_event: msg_id=%x\n", id
);
252 case AUDPLAY_MSG_DEC_NEEDS_DATA
:
253 audplay_send_data(audio
, 1);
256 case AUDPLAY_MSG_BUFFER_UPDATE
:
257 audio_update_pcm_buf_entry(audio
, msg
);
261 pr_err("unexpected message from decoder \n");
266 static void audio_dsp_event(void *private, unsigned id
, uint16_t *msg
)
268 struct audio
*audio
= private;
271 case AUDPP_MSG_STATUS_MSG
:{
272 unsigned status
= msg
[1];
275 case AUDPP_DEC_STATUS_SLEEP
:
276 pr_info("decoder status: sleep \n");
279 case AUDPP_DEC_STATUS_INIT
:
280 pr_info("decoder status: init \n");
281 audpp_cmd_cfg_routing_mode(audio
);
284 case AUDPP_DEC_STATUS_CFG
:
285 pr_info("decoder status: cfg \n");
287 case AUDPP_DEC_STATUS_PLAY
:
288 pr_info("decoder status: play \n");
289 if (audio
->pcm_feedback
) {
290 audplay_config_hostpcm(audio
);
291 audplay_buffer_refresh(audio
);
295 pr_err("unknown decoder status \n");
300 case AUDPP_MSG_CFG_MSG
:
301 if (msg
[0] == AUDPP_MSG_ENA_ENA
) {
302 pr_info("audio_dsp_event: CFG_MSG ENABLE\n");
303 auddec_dsp_config(audio
, 1);
304 audio
->out_needed
= 0;
306 audpp_set_volume_and_pan(audio
->dec_id
, audio
->volume
,
308 audpp_avsync(audio
->dec_id
, 22050);
309 } else if (msg
[0] == AUDPP_MSG_ENA_DIS
) {
310 pr_info("audio_dsp_event: CFG_MSG DISABLE\n");
311 audpp_avsync(audio
->dec_id
, 0);
314 pr_err("audio_dsp_event: CFG_MSG %d?\n", msg
[0]);
317 case AUDPP_MSG_ROUTING_ACK
:
318 pr_info("audio_dsp_event: ROUTING_ACK mode=%d\n", msg
[1]);
319 audpp_cmd_cfg_adec_params(audio
);
322 case AUDPP_MSG_FLUSH_ACK
:
323 dprintk("%s: FLUSH_ACK\n", __func__
);
326 if (audio
->pcm_feedback
)
327 audplay_buffer_refresh(audio
);
331 pr_err("audio_dsp_event: UNKNOWN (%d)\n", id
);
337 struct msm_adsp_ops audplay_adsp_ops
= {
338 .event
= audplay_dsp_event
,
342 #define audplay_send_queue0(audio, cmd, len) \
343 msm_adsp_write(audio->audplay, QDSP_uPAudPlay0BitStreamCtrlQueue, \
346 static int auddec_dsp_config(struct audio
*audio
, int enable
)
348 audpp_cmd_cfg_dec_type cmd
;
350 memset(&cmd
, 0, sizeof(cmd
));
351 cmd
.cmd_id
= AUDPP_CMD_CFG_DEC_TYPE
;
353 cmd
.dec0_cfg
= AUDPP_CMD_UPDATDE_CFG_DEC
|
354 AUDPP_CMD_ENA_DEC_V
|
357 cmd
.dec0_cfg
= AUDPP_CMD_UPDATDE_CFG_DEC
|
360 return audpp_send_queue1(&cmd
, sizeof(cmd
));
363 static void audpp_cmd_cfg_adec_params(struct audio
*audio
)
365 audpp_cmd_cfg_adec_params_mp3 cmd
;
367 memset(&cmd
, 0, sizeof(cmd
));
368 cmd
.common
.cmd_id
= AUDPP_CMD_CFG_ADEC_PARAMS
;
369 cmd
.common
.length
= AUDPP_CMD_CFG_ADEC_PARAMS_MP3_LEN
;
370 cmd
.common
.dec_id
= audio
->dec_id
;
371 cmd
.common
.input_sampling_frequency
= audio
->out_sample_rate
;
373 audpp_send_queue2(&cmd
, sizeof(cmd
));
376 static void audpp_cmd_cfg_routing_mode(struct audio
*audio
)
378 struct audpp_cmd_routing_mode cmd
;
379 pr_info("audpp_cmd_cfg_routing_mode()\n");
380 memset(&cmd
, 0, sizeof(cmd
));
381 cmd
.cmd_id
= AUDPP_CMD_ROUTING_MODE
;
382 cmd
.object_number
= audio
->dec_id
;
383 if (audio
->pcm_feedback
)
384 cmd
.routing_mode
= ROUTING_MODE_FTRT
;
386 cmd
.routing_mode
= ROUTING_MODE_RT
;
388 audpp_send_queue1(&cmd
, sizeof(cmd
));
391 static int audplay_dsp_send_data_avail(struct audio
*audio
,
392 unsigned idx
, unsigned len
)
394 audplay_cmd_bitstream_data_avail cmd
;
396 cmd
.cmd_id
= AUDPLAY_CMD_BITSTREAM_DATA_AVAIL
;
397 cmd
.decoder_id
= audio
->dec_id
;
398 cmd
.buf_ptr
= audio
->out
[idx
].addr
;
399 cmd
.buf_size
= len
/2;
400 cmd
.partition_number
= 0;
401 return audplay_send_queue0(audio
, &cmd
, sizeof(cmd
));
404 static void audplay_buffer_refresh(struct audio
*audio
)
406 struct audplay_cmd_buffer_refresh refresh_cmd
;
408 refresh_cmd
.cmd_id
= AUDPLAY_CMD_BUFFER_REFRESH
;
409 refresh_cmd
.num_buffers
= 1;
410 refresh_cmd
.buf0_address
= audio
->in
[audio
->fill_next
].addr
;
411 refresh_cmd
.buf0_length
= audio
->in
[audio
->fill_next
].size
-
412 (audio
->in
[audio
->fill_next
].size
% 576); /* Mp3 frame size */
413 refresh_cmd
.buf_read_count
= 0;
414 pr_info("audplay_buffer_fresh: buf0_addr=%x buf0_len=%d\n",
415 refresh_cmd
.buf0_address
, refresh_cmd
.buf0_length
);
416 (void)audplay_send_queue0(audio
, &refresh_cmd
, sizeof(refresh_cmd
));
419 static void audplay_config_hostpcm(struct audio
*audio
)
421 struct audplay_cmd_hpcm_buf_cfg cfg_cmd
;
423 pr_info("audplay_config_hostpcm()\n");
424 cfg_cmd
.cmd_id
= AUDPLAY_CMD_HPCM_BUF_CFG
;
425 cfg_cmd
.max_buffers
= 1;
426 cfg_cmd
.byte_swap
= 0;
427 cfg_cmd
.hostpcm_config
= (0x8000) | (0x4000);
428 cfg_cmd
.feedback_frequency
= 1;
429 cfg_cmd
.partition_number
= 0;
430 (void)audplay_send_queue0(audio
, &cfg_cmd
, sizeof(cfg_cmd
));
434 static void audplay_send_data(struct audio
*audio
, unsigned needed
)
436 struct buffer
*frame
;
439 spin_lock_irqsave(&audio
->dsp_lock
, flags
);
444 audio
->out_needed
= 1;
448 if (needed
&& !audio
->wflush
) {
449 /* We were called from the callback because the DSP
450 * requested more data. Note that the DSP does want
451 * more data, and if a buffer was in-flight, mark it
452 * as available (since the DSP must now be done with
455 audio
->out_needed
= 1;
456 frame
= audio
->out
+ audio
->out_tail
;
457 if (frame
->used
== 0xffffffff) {
458 dprintk("frame %d free\n", audio
->out_tail
);
460 audio
->out_tail
^= 1;
461 wake_up(&audio
->write_wait
);
465 if (audio
->out_needed
) {
466 /* If the DSP currently wants data and we have a
467 * buffer available, we will send it and reset
468 * the needed flag. We'll mark the buffer as in-flight
469 * so that it won't be recycled until the next buffer
473 frame
= audio
->out
+ audio
->out_tail
;
475 BUG_ON(frame
->used
== 0xffffffff);
476 dprintk("frame %d busy\n", audio
->out_tail
);
477 audplay_dsp_send_data_avail(audio
, audio
->out_tail
,
479 frame
->used
= 0xffffffff;
480 audio
->out_needed
= 0;
484 spin_unlock_irqrestore(&audio
->dsp_lock
, flags
);
487 /* ------------------- device --------------------- */
489 static void audio_flush(struct audio
*audio
)
491 audio
->out
[0].used
= 0;
492 audio
->out
[1].used
= 0;
496 atomic_set(&audio
->out_bytes
, 0);
499 static void audio_flush_pcm_buf(struct audio
*audio
)
503 for (index
= 0; index
< PCM_BUF_MAX_COUNT
; index
++)
504 audio
->in
[index
].used
= 0;
506 audio
->read_next
= 0;
507 audio
->fill_next
= 0;
510 static void audio_ioport_reset(struct audio
*audio
)
512 /* Make sure read/write thread are free from
513 * sleep and knowing that system is not able
514 * to process io request at the moment
516 wake_up(&audio
->write_wait
);
517 mutex_lock(&audio
->write_lock
);
519 mutex_unlock(&audio
->write_lock
);
520 wake_up(&audio
->read_wait
);
521 mutex_lock(&audio
->read_lock
);
522 audio_flush_pcm_buf(audio
);
523 mutex_unlock(&audio
->read_lock
);
526 static long audio_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
528 struct audio
*audio
= file
->private_data
;
531 pr_info("audio_ioctl() cmd = %d\n", cmd
);
533 if (cmd
== AUDIO_GET_STATS
) {
534 struct msm_audio_stats stats
;
535 stats
.byte_count
= audpp_avsync_byte_count(audio
->dec_id
);
536 stats
.sample_count
= audpp_avsync_sample_count(audio
->dec_id
);
537 if (copy_to_user((void *) arg
, &stats
, sizeof(stats
)))
541 if (cmd
== AUDIO_SET_VOLUME
) {
543 spin_lock_irqsave(&audio
->dsp_lock
, flags
);
546 audpp_set_volume_and_pan(audio
->dec_id
, arg
, 0);
547 spin_unlock_irqrestore(&audio
->dsp_lock
, flags
);
550 mutex_lock(&audio
->lock
);
553 rc
= audio_enable(audio
);
556 rc
= audio_disable(audio
);
558 audio_ioport_reset(audio
);
562 dprintk("%s: AUDIO_FLUSH\n", __func__
);
565 audio_ioport_reset(audio
);
569 if (audio
->buf_refresh
) {
570 audio
->buf_refresh
= 0;
571 audplay_buffer_refresh(audio
);
575 case AUDIO_SET_CONFIG
: {
576 struct msm_audio_config config
;
577 if (copy_from_user(&config
, (void *) arg
, sizeof(config
))) {
581 if (config
.channel_count
== 1) {
582 config
.channel_count
= AUDPP_CMD_PCM_INTF_MONO_V
;
583 } else if (config
.channel_count
== 2) {
584 config
.channel_count
= AUDPP_CMD_PCM_INTF_STEREO_V
;
589 audio
->out_sample_rate
= config
.sample_rate
;
590 audio
->out_channel_mode
= config
.channel_count
;
594 case AUDIO_GET_CONFIG
: {
595 struct msm_audio_config config
;
596 config
.buffer_size
= (audio
->out_dma_sz
>> 1);
597 config
.buffer_count
= 2;
598 config
.sample_rate
= audio
->out_sample_rate
;
599 if (audio
->out_channel_mode
== AUDPP_CMD_PCM_INTF_MONO_V
) {
600 config
.channel_count
= 1;
602 config
.channel_count
= 2;
604 config
.unused
[0] = 0;
605 config
.unused
[1] = 0;
606 config
.unused
[2] = 0;
607 config
.unused
[3] = 0;
608 if (copy_to_user((void *) arg
, &config
, sizeof(config
))) {
615 case AUDIO_GET_PCM_CONFIG
:{
616 struct msm_audio_pcm_config config
;
617 config
.pcm_feedback
= 0;
618 config
.buffer_count
= PCM_BUF_MAX_COUNT
;
619 config
.buffer_size
= PCM_BUFSZ_MIN
;
620 if (copy_to_user((void *)arg
, &config
,
627 case AUDIO_SET_PCM_CONFIG
:{
628 struct msm_audio_pcm_config config
;
630 (&config
, (void *)arg
, sizeof(config
))) {
634 if ((config
.buffer_count
> PCM_BUF_MAX_COUNT
) ||
635 (config
.buffer_count
== 1))
636 config
.buffer_count
= PCM_BUF_MAX_COUNT
;
638 if (config
.buffer_size
< PCM_BUFSZ_MIN
)
639 config
.buffer_size
= PCM_BUFSZ_MIN
;
641 /* Check if pcm feedback is required */
642 if ((config
.pcm_feedback
) && (!audio
->read_data
)) {
643 pr_info("ioctl: allocate PCM buffer %d\n",
644 config
.buffer_count
*
647 dma_alloc_coherent(NULL
,
652 if (!audio
->read_data
) {
653 pr_err("audio_mp3: malloc pcm buf failed\n");
658 audio
->pcm_feedback
= 1;
659 audio
->buf_refresh
= 0;
660 audio
->pcm_buf_count
=
662 audio
->read_next
= 0;
663 audio
->fill_next
= 0;
666 index
< config
.buffer_count
;
668 audio
->in
[index
].data
=
669 audio
->read_data
+ offset
;
670 audio
->in
[index
].addr
=
671 audio
->read_phys
+ offset
;
672 audio
->in
[index
].size
=
674 audio
->in
[index
].used
= 0;
675 offset
+= config
.buffer_size
;
685 dprintk("%s: AUDIO_PAUSE %ld\n", __func__
, arg
);
686 rc
= audpp_pause(audio
->dec_id
, (int) arg
);
691 mutex_unlock(&audio
->lock
);
695 static ssize_t
audio_read(struct file
*file
, char __user
*buf
, size_t count
,
698 struct audio
*audio
= file
->private_data
;
699 const char __user
*start
= buf
;
702 if (!audio
->pcm_feedback
)
703 return 0; /* PCM feedback disabled. Nothing to read */
705 mutex_lock(&audio
->read_lock
);
706 pr_info("audio_read() %d \n", count
);
708 rc
= wait_event_interruptible(audio
->read_wait
,
709 (audio
->in
[audio
->read_next
].
710 used
> 0) || (audio
->stopped
)
716 if (audio
->stopped
|| audio
->rflush
) {
721 if (count
< audio
->in
[audio
->read_next
].used
) {
722 /* Read must happen in frame boundary. Since
723 * driver does not know frame size, read count
724 * must be greater or equal
725 * to size of PCM samples
727 pr_info("audio_read: no partial frame done reading\n");
730 pr_info("audio_read: read from in[%d]\n",
733 (buf
, audio
->in
[audio
->read_next
].data
,
734 audio
->in
[audio
->read_next
].used
)) {
735 pr_err("audio_read: invalid addr %x \n",
740 count
-= audio
->in
[audio
->read_next
].used
;
741 buf
+= audio
->in
[audio
->read_next
].used
;
742 audio
->in
[audio
->read_next
].used
= 0;
743 if ((++audio
->read_next
) == audio
->pcm_buf_count
)
744 audio
->read_next
= 0;
745 if (audio
->in
[audio
->read_next
].used
== 0)
746 break; /* No data ready at this moment
747 * Exit while loop to prevent
748 * output thread sleep too long
753 /* don't feed output buffer to HW decoder during flushing
754 * buffer refresh command will be sent once flush completes
755 * send buf refresh command here can confuse HW decoder
757 if (audio
->buf_refresh
&& !audio
->rflush
) {
758 audio
->buf_refresh
= 0;
759 pr_info("audio_read: kick start pcm feedback again\n");
760 audplay_buffer_refresh(audio
);
763 mutex_unlock(&audio
->read_lock
);
768 pr_info("audio_read: read %d bytes\n", rc
);
772 static ssize_t
audio_write(struct file
*file
, const char __user
*buf
,
773 size_t count
, loff_t
*pos
)
775 struct audio
*audio
= file
->private_data
;
776 const char __user
*start
= buf
;
777 struct buffer
*frame
;
783 mutex_lock(&audio
->write_lock
);
785 frame
= audio
->out
+ audio
->out_head
;
786 cpy_ptr
= frame
->data
;
788 rc
= wait_event_interruptible(audio
->write_wait
,
794 if (audio
->stopped
|| audio
->wflush
) {
799 if (audio
->reserved
) {
800 dprintk("%s: append reserved byte %x\n",
801 __func__
, audio
->rsv_byte
);
802 *cpy_ptr
= audio
->rsv_byte
;
803 xfer
= (count
> (frame
->size
- 1)) ?
804 frame
->size
- 1 : count
;
809 xfer
= (count
> frame
->size
) ? frame
->size
: count
;
811 if (copy_from_user(cpy_ptr
, buf
, xfer
)) {
818 audio
->rsv_byte
= ((char *) frame
->data
)[dsize
- 1];
819 dprintk("%s: odd length buf reserve last byte %x\n",
820 __func__
, audio
->rsv_byte
);
828 audio
->out_head
^= 1;
830 audplay_send_data(audio
, 0);
833 mutex_unlock(&audio
->write_lock
);
839 static int audio_release(struct inode
*inode
, struct file
*file
)
841 struct audio
*audio
= file
->private_data
;
843 dprintk("audio_release()\n");
845 mutex_lock(&audio
->lock
);
846 audio_disable(audio
);
848 audio_flush_pcm_buf(audio
);
849 msm_adsp_put(audio
->audplay
);
850 audio
->audplay
= NULL
;
853 dma_free_coherent(NULL
, audio
->out_dma_sz
, audio
->data
, audio
->phys
);
855 if (audio
->read_data
!= NULL
) {
856 dma_free_coherent(NULL
,
857 audio
->in
[0].size
* audio
->pcm_buf_count
,
858 audio
->read_data
, audio
->read_phys
);
859 audio
->read_data
= NULL
;
861 audio
->pcm_feedback
= 0;
862 mutex_unlock(&audio
->lock
);
866 static struct audio the_mp3_audio
;
868 static int audio_open(struct inode
*inode
, struct file
*file
)
870 struct audio
*audio
= &the_mp3_audio
;
874 mutex_lock(&audio
->lock
);
877 pr_err("audio: busy\n");
884 while (pmem_sz
>= DMASZ_MIN
) {
885 audio
->data
= dma_alloc_coherent(NULL
, pmem_sz
,
886 &audio
->phys
, GFP_KERNEL
);
889 else if (pmem_sz
== DMASZ_MIN
) {
890 pr_err("audio: could not allocate DMA buffers\n");
897 dprintk("%s: allocated %d bytes DMA buffer\n", __func__
, pmem_sz
);
899 rc
= audmgr_open(&audio
->audmgr
);
901 dma_free_coherent(NULL
, pmem_sz
,
902 audio
->data
, audio
->phys
);
906 rc
= msm_adsp_get("AUDPLAY0TASK", &audio
->audplay
, &audplay_adsp_ops
,
909 pr_err("audio: failed to get audplay0 dsp module\n");
910 dma_free_coherent(NULL
, pmem_sz
,
911 audio
->data
, audio
->phys
);
912 audmgr_close(&audio
->audmgr
);
916 audio
->out_dma_sz
= pmem_sz
;
917 pmem_sz
>>= 1; /* Shift by 1 to get size of ping pong buffer */
919 audio
->out_sample_rate
= 44100;
920 audio
->out_channel_mode
= AUDPP_CMD_PCM_INTF_STEREO_V
;
923 audio
->out
[0].data
= audio
->data
+ 0;
924 audio
->out
[0].addr
= audio
->phys
+ 0;
925 audio
->out
[0].size
= pmem_sz
;
927 audio
->out
[1].data
= audio
->data
+ pmem_sz
;
928 audio
->out
[1].addr
= audio
->phys
+ pmem_sz
;
929 audio
->out
[1].size
= pmem_sz
;
931 audio
->volume
= 0x2000; /* equal to Q13 number 1.0 Unit Gain */
935 file
->private_data
= audio
;
939 mutex_unlock(&audio
->lock
);
943 static struct file_operations audio_mp3_fops
= {
944 .owner
= THIS_MODULE
,
946 .release
= audio_release
,
948 .write
= audio_write
,
949 .unlocked_ioctl
= audio_ioctl
,
952 struct miscdevice audio_mp3_misc
= {
953 .minor
= MISC_DYNAMIC_MINOR
,
955 .fops
= &audio_mp3_fops
,
958 static int __init
audio_init(void)
960 mutex_init(&the_mp3_audio
.lock
);
961 mutex_init(&the_mp3_audio
.write_lock
);
962 mutex_init(&the_mp3_audio
.read_lock
);
963 spin_lock_init(&the_mp3_audio
.dsp_lock
);
964 init_waitqueue_head(&the_mp3_audio
.write_wait
);
965 init_waitqueue_head(&the_mp3_audio
.read_wait
);
966 the_mp3_audio
.read_data
= NULL
;
967 return misc_register(&audio_mp3_misc
);
970 device_initcall(audio_init
);