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1 | /* arch/arm/mach-msm/audio_evrc.c |
2 | * | |
3 | * Copyright (c) 2008 QUALCOMM USA, INC. | |
4 | * | |
5 | * This code also borrows from audio_aac.c, which is | |
6 | * Copyright (C) 2008 Google, Inc. | |
7 | * Copyright (C) 2008 HTC Corporation | |
8 | * | |
9 | * This software is licensed under the terms of the GNU General Public | |
10 | * License version 2, as published by the Free Software Foundation, and | |
11 | * may be copied, distributed, and modified under those terms. | |
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. | |
16 | * | |
17 | * See the GNU General Public License for more details. | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, you can find it at http://www.fsf.org. | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/miscdevice.h> | |
25 | #include <linux/uaccess.h> | |
26 | #include <linux/kthread.h> | |
27 | #include <linux/wait.h> | |
28 | #include <linux/dma-mapping.h> | |
29 | #include <linux/delay.h> | |
5a0e3ad6 | 30 | #include <linux/gfp.h> |
caff4cae IM |
31 | |
32 | #include <asm/atomic.h> | |
33 | #include <asm/ioctls.h> | |
34 | #include <mach/msm_adsp.h> | |
35 | #include <linux/msm_audio.h> | |
36 | #include "audmgr.h" | |
37 | ||
38 | #include <mach/qdsp5/qdsp5audppcmdi.h> | |
39 | #include <mach/qdsp5/qdsp5audppmsg.h> | |
40 | #include <mach/qdsp5/qdsp5audplaycmdi.h> | |
41 | #include <mach/qdsp5/qdsp5audplaymsg.h> | |
42 | ||
43 | #include "adsp.h" | |
44 | ||
45 | #ifdef DEBUG | |
46 | #define dprintk(format, arg...) \ | |
47 | printk(KERN_DEBUG format, ## arg) | |
48 | #else | |
49 | #define dprintk(format, arg...) do {} while (0) | |
50 | #endif | |
51 | ||
52 | /* Hold 30 packets of 24 bytes each*/ | |
53 | #define BUFSZ 720 | |
54 | #define DMASZ (BUFSZ * 2) | |
55 | ||
56 | #define AUDDEC_DEC_EVRC 12 | |
57 | ||
58 | #define PCM_BUFSZ_MIN 1600 /* 100ms worth of data */ | |
59 | #define PCM_BUF_MAX_COUNT 5 | |
60 | /* DSP only accepts 5 buffers at most | |
61 | * but support 2 buffers currently | |
62 | */ | |
63 | #define EVRC_DECODED_FRSZ 320 /* EVRC 20ms 8KHz mono PCM size */ | |
64 | ||
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 | |
72 | ||
73 | struct buffer { | |
74 | void *data; | |
75 | unsigned size; | |
76 | unsigned used; /* Input usage actual DSP produced PCM size */ | |
77 | unsigned addr; | |
78 | }; | |
79 | ||
80 | struct audio { | |
81 | struct buffer out[2]; | |
82 | ||
83 | spinlock_t dsp_lock; | |
84 | ||
85 | uint8_t out_head; | |
86 | uint8_t out_tail; | |
87 | uint8_t out_needed; /* number of buffers the dsp is waiting for */ | |
88 | ||
89 | atomic_t out_bytes; | |
90 | ||
91 | struct mutex lock; | |
92 | struct mutex write_lock; | |
93 | wait_queue_head_t write_wait; | |
94 | ||
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 */ | |
105 | ||
106 | struct msm_adsp_module *audplay; | |
107 | struct audmgr audmgr; | |
108 | ||
109 | /* data allocated for various buffers */ | |
110 | char *data; | |
111 | dma_addr_t phys; | |
112 | ||
113 | uint8_t opened:1; | |
114 | uint8_t enabled:1; | |
115 | uint8_t running:1; | |
116 | uint8_t stopped:1; /* set when stopped, cleared on flush */ | |
117 | uint8_t pcm_feedback:1; | |
118 | uint8_t buf_refresh:1; | |
119 | ||
120 | unsigned volume; | |
121 | uint16_t dec_id; | |
122 | uint32_t read_ptr_offset; | |
123 | }; | |
124 | static struct audio the_evrc_audio; | |
125 | ||
126 | static int auddec_dsp_config(struct audio *audio, int enable); | |
127 | static void audpp_cmd_cfg_adec_params(struct audio *audio); | |
128 | static void audpp_cmd_cfg_routing_mode(struct audio *audio); | |
129 | static void audevrc_send_data(struct audio *audio, unsigned needed); | |
130 | static void audevrc_dsp_event(void *private, unsigned id, uint16_t *msg); | |
131 | static void audevrc_config_hostpcm(struct audio *audio); | |
132 | static void audevrc_buffer_refresh(struct audio *audio); | |
133 | ||
134 | /* must be called with audio->lock held */ | |
135 | static int audevrc_enable(struct audio *audio) | |
136 | { | |
137 | struct audmgr_config cfg; | |
138 | int rc; | |
139 | ||
140 | if (audio->enabled) | |
141 | return 0; | |
142 | ||
143 | audio->out_tail = 0; | |
144 | audio->out_needed = 0; | |
145 | ||
146 | cfg.tx_rate = RPC_AUD_DEF_SAMPLE_RATE_NONE; | |
147 | cfg.rx_rate = RPC_AUD_DEF_SAMPLE_RATE_48000; | |
148 | cfg.def_method = RPC_AUD_DEF_METHOD_PLAYBACK; | |
149 | cfg.codec = RPC_AUD_DEF_CODEC_EVRC; | |
150 | cfg.snd_method = RPC_SND_METHOD_MIDI; | |
151 | ||
152 | rc = audmgr_enable(&audio->audmgr, &cfg); | |
153 | if (rc < 0) | |
154 | return rc; | |
155 | ||
156 | if (msm_adsp_enable(audio->audplay)) { | |
157 | pr_err("audio: msm_adsp_enable(audplay) failed\n"); | |
158 | audmgr_disable(&audio->audmgr); | |
159 | return -ENODEV; | |
160 | } | |
161 | ||
162 | if (audpp_enable(audio->dec_id, audevrc_dsp_event, audio)) { | |
163 | pr_err("audio: audpp_enable() failed\n"); | |
164 | msm_adsp_disable(audio->audplay); | |
165 | audmgr_disable(&audio->audmgr); | |
166 | return -ENODEV; | |
167 | } | |
168 | audio->enabled = 1; | |
169 | return 0; | |
170 | } | |
171 | ||
172 | /* must be called with audio->lock held */ | |
173 | static int audevrc_disable(struct audio *audio) | |
174 | { | |
175 | if (audio->enabled) { | |
176 | audio->enabled = 0; | |
177 | auddec_dsp_config(audio, 0); | |
178 | wake_up(&audio->write_wait); | |
179 | wake_up(&audio->read_wait); | |
180 | msm_adsp_disable(audio->audplay); | |
181 | audpp_disable(audio->dec_id, audio); | |
182 | audmgr_disable(&audio->audmgr); | |
183 | audio->out_needed = 0; | |
184 | } | |
185 | return 0; | |
186 | } | |
187 | ||
188 | /* ------------------- dsp --------------------- */ | |
189 | ||
190 | static void audevrc_update_pcm_buf_entry(struct audio *audio, | |
191 | uint32_t *payload) | |
192 | { | |
193 | uint8_t index; | |
194 | unsigned long flags; | |
195 | ||
196 | spin_lock_irqsave(&audio->dsp_lock, flags); | |
197 | for (index = 0; index < payload[1]; index++) { | |
198 | if (audio->in[audio->fill_next].addr | |
199 | == payload[2 + index * 2]) { | |
200 | dprintk("audevrc_update_pcm_buf_entry: in[%d] ready\n", | |
201 | audio->fill_next); | |
202 | audio->in[audio->fill_next].used = | |
203 | payload[3 + index * 2]; | |
204 | if ((++audio->fill_next) == audio->pcm_buf_count) | |
205 | audio->fill_next = 0; | |
206 | ||
207 | } else { | |
208 | pr_err | |
209 | ("audevrc_update_pcm_buf_entry: expected=%x ret=%x\n", | |
210 | audio->in[audio->fill_next].addr, | |
211 | payload[1 + index * 2]); | |
212 | break; | |
213 | } | |
214 | } | |
215 | if (audio->in[audio->fill_next].used == 0) { | |
216 | audevrc_buffer_refresh(audio); | |
217 | } else { | |
218 | dprintk("audevrc_update_pcm_buf_entry: read cannot keep up\n"); | |
219 | audio->buf_refresh = 1; | |
220 | } | |
221 | ||
222 | spin_unlock_irqrestore(&audio->dsp_lock, flags); | |
223 | wake_up(&audio->read_wait); | |
224 | } | |
225 | ||
226 | static void audplay_dsp_event(void *data, unsigned id, size_t len, | |
227 | void (*getevent) (void *ptr, size_t len)) | |
228 | { | |
229 | struct audio *audio = data; | |
230 | uint32_t msg[28]; | |
231 | getevent(msg, sizeof(msg)); | |
232 | ||
233 | dprintk("audplay_dsp_event: msg_id=%x\n", id); | |
234 | switch (id) { | |
235 | case AUDPLAY_MSG_DEC_NEEDS_DATA: | |
236 | audevrc_send_data(audio, 1); | |
237 | break; | |
238 | case AUDPLAY_MSG_BUFFER_UPDATE: | |
239 | dprintk("audevrc_update_pcm_buf_entry:======> \n"); | |
240 | audevrc_update_pcm_buf_entry(audio, msg); | |
241 | break; | |
242 | default: | |
243 | pr_err("unexpected message from decoder \n"); | |
244 | } | |
245 | } | |
246 | ||
247 | static void audevrc_dsp_event(void *private, unsigned id, uint16_t *msg) | |
248 | { | |
249 | struct audio *audio = private; | |
250 | ||
251 | switch (id) { | |
252 | case AUDPP_MSG_STATUS_MSG:{ | |
253 | unsigned status = msg[1]; | |
254 | ||
255 | switch (status) { | |
256 | case AUDPP_DEC_STATUS_SLEEP: | |
257 | dprintk("decoder status: sleep \n"); | |
258 | break; | |
259 | ||
260 | case AUDPP_DEC_STATUS_INIT: | |
261 | dprintk("decoder status: init \n"); | |
262 | audpp_cmd_cfg_routing_mode(audio); | |
263 | break; | |
264 | ||
265 | case AUDPP_DEC_STATUS_CFG: | |
266 | dprintk("decoder status: cfg \n"); | |
267 | break; | |
268 | case AUDPP_DEC_STATUS_PLAY: | |
269 | dprintk("decoder status: play \n"); | |
270 | if (audio->pcm_feedback) { | |
271 | audevrc_config_hostpcm(audio); | |
272 | audevrc_buffer_refresh(audio); | |
273 | } | |
274 | break; | |
275 | default: | |
276 | pr_err("unknown decoder status \n"); | |
277 | } | |
278 | break; | |
279 | } | |
280 | case AUDPP_MSG_CFG_MSG: | |
281 | if (msg[0] == AUDPP_MSG_ENA_ENA) { | |
282 | dprintk("audevrc_dsp_event: CFG_MSG ENABLE\n"); | |
283 | auddec_dsp_config(audio, 1); | |
284 | audio->out_needed = 0; | |
285 | audio->running = 1; | |
286 | audpp_set_volume_and_pan(audio->dec_id, audio->volume, | |
287 | 0); | |
288 | audpp_avsync(audio->dec_id, 22050); | |
289 | } else if (msg[0] == AUDPP_MSG_ENA_DIS) { | |
290 | dprintk("audevrc_dsp_event: CFG_MSG DISABLE\n"); | |
291 | audpp_avsync(audio->dec_id, 0); | |
292 | audio->running = 0; | |
293 | } else { | |
294 | pr_err("audevrc_dsp_event: CFG_MSG %d?\n", msg[0]); | |
295 | } | |
296 | break; | |
297 | case AUDPP_MSG_ROUTING_ACK: | |
298 | dprintk("audevrc_dsp_event: ROUTING_ACK\n"); | |
299 | audpp_cmd_cfg_adec_params(audio); | |
300 | break; | |
301 | ||
302 | default: | |
303 | pr_err("audevrc_dsp_event: UNKNOWN (%d)\n", id); | |
304 | } | |
305 | ||
306 | } | |
307 | ||
308 | struct msm_adsp_ops audplay_adsp_ops_evrc = { | |
309 | .event = audplay_dsp_event, | |
310 | }; | |
311 | ||
312 | #define audplay_send_queue0(audio, cmd, len) \ | |
313 | msm_adsp_write(audio->audplay, QDSP_uPAudPlay0BitStreamCtrlQueue, \ | |
314 | cmd, len) | |
315 | ||
316 | static int auddec_dsp_config(struct audio *audio, int enable) | |
317 | { | |
318 | audpp_cmd_cfg_dec_type cmd; | |
319 | ||
320 | memset(&cmd, 0, sizeof(cmd)); | |
321 | cmd.cmd_id = AUDPP_CMD_CFG_DEC_TYPE; | |
322 | if (enable) | |
323 | cmd.dec0_cfg = AUDPP_CMD_UPDATDE_CFG_DEC | | |
324 | AUDPP_CMD_ENA_DEC_V | AUDDEC_DEC_EVRC; | |
325 | else | |
326 | cmd.dec0_cfg = AUDPP_CMD_UPDATDE_CFG_DEC | AUDPP_CMD_DIS_DEC_V; | |
327 | ||
328 | return audpp_send_queue1(&cmd, sizeof(cmd)); | |
329 | } | |
330 | ||
331 | static void audpp_cmd_cfg_adec_params(struct audio *audio) | |
332 | { | |
333 | struct audpp_cmd_cfg_adec_params_evrc cmd; | |
334 | ||
335 | memset(&cmd, 0, sizeof(cmd)); | |
336 | cmd.common.cmd_id = AUDPP_CMD_CFG_ADEC_PARAMS; | |
337 | cmd.common.length = sizeof(cmd); | |
338 | cmd.common.dec_id = audio->dec_id; | |
339 | cmd.common.input_sampling_frequency = 8000; | |
340 | cmd.stereo_cfg = AUDPP_CMD_PCM_INTF_MONO_V; | |
341 | ||
342 | audpp_send_queue2(&cmd, sizeof(cmd)); | |
343 | } | |
344 | ||
345 | static void audpp_cmd_cfg_routing_mode(struct audio *audio) | |
346 | { | |
347 | struct audpp_cmd_routing_mode cmd; | |
348 | dprintk("audpp_cmd_cfg_routing_mode()\n"); | |
349 | memset(&cmd, 0, sizeof(cmd)); | |
350 | cmd.cmd_id = AUDPP_CMD_ROUTING_MODE; | |
351 | cmd.object_number = audio->dec_id; | |
352 | if (audio->pcm_feedback) | |
353 | cmd.routing_mode = ROUTING_MODE_FTRT; | |
354 | else | |
355 | cmd.routing_mode = ROUTING_MODE_RT; | |
356 | ||
357 | audpp_send_queue1(&cmd, sizeof(cmd)); | |
358 | } | |
359 | ||
360 | static int audplay_dsp_send_data_avail(struct audio *audio, | |
361 | unsigned idx, unsigned len) | |
362 | { | |
363 | audplay_cmd_bitstream_data_avail cmd; | |
364 | ||
365 | cmd.cmd_id = AUDPLAY_CMD_BITSTREAM_DATA_AVAIL; | |
366 | cmd.decoder_id = audio->dec_id; | |
367 | cmd.buf_ptr = audio->out[idx].addr; | |
368 | cmd.buf_size = len / 2; | |
369 | cmd.partition_number = 0; | |
370 | return audplay_send_queue0(audio, &cmd, sizeof(cmd)); | |
371 | } | |
372 | ||
373 | static void audevrc_buffer_refresh(struct audio *audio) | |
374 | { | |
375 | struct audplay_cmd_buffer_refresh refresh_cmd; | |
376 | ||
377 | refresh_cmd.cmd_id = AUDPLAY_CMD_BUFFER_REFRESH; | |
378 | refresh_cmd.num_buffers = 1; | |
379 | refresh_cmd.buf0_address = audio->in[audio->fill_next].addr; | |
380 | refresh_cmd.buf0_length = audio->in[audio->fill_next].size; | |
381 | ||
382 | refresh_cmd.buf_read_count = 0; | |
383 | dprintk("audplay_buffer_fresh: buf0_addr=%x buf0_len=%d\n", | |
384 | refresh_cmd.buf0_address, refresh_cmd.buf0_length); | |
385 | audplay_send_queue0(audio, &refresh_cmd, sizeof(refresh_cmd)); | |
386 | } | |
387 | ||
388 | static void audevrc_config_hostpcm(struct audio *audio) | |
389 | { | |
390 | struct audplay_cmd_hpcm_buf_cfg cfg_cmd; | |
391 | ||
392 | dprintk("audevrc_config_hostpcm()\n"); | |
393 | cfg_cmd.cmd_id = AUDPLAY_CMD_HPCM_BUF_CFG; | |
394 | cfg_cmd.max_buffers = 1; | |
395 | cfg_cmd.byte_swap = 0; | |
396 | cfg_cmd.hostpcm_config = (0x8000) | (0x4000); | |
397 | cfg_cmd.feedback_frequency = 1; | |
398 | cfg_cmd.partition_number = 0; | |
399 | audplay_send_queue0(audio, &cfg_cmd, sizeof(cfg_cmd)); | |
400 | ||
401 | } | |
402 | ||
403 | static void audevrc_send_data(struct audio *audio, unsigned needed) | |
404 | { | |
405 | struct buffer *frame; | |
406 | unsigned long flags; | |
407 | ||
408 | spin_lock_irqsave(&audio->dsp_lock, flags); | |
409 | if (!audio->running) | |
410 | goto done; | |
411 | ||
412 | if (needed) { | |
413 | /* We were called from the callback because the DSP | |
414 | * requested more data. Note that the DSP does want | |
415 | * more data, and if a buffer was in-flight, mark it | |
416 | * as available (since the DSP must now be done with | |
417 | * it). | |
418 | */ | |
419 | audio->out_needed = 1; | |
420 | frame = audio->out + audio->out_tail; | |
421 | if (frame->used == 0xffffffff) { | |
422 | dprintk("frame %d free\n", audio->out_tail); | |
423 | frame->used = 0; | |
424 | audio->out_tail ^= 1; | |
425 | wake_up(&audio->write_wait); | |
426 | } | |
427 | } | |
428 | ||
429 | if (audio->out_needed) { | |
430 | /* If the DSP currently wants data and we have a | |
431 | * buffer available, we will send it and reset | |
432 | * the needed flag. We'll mark the buffer as in-flight | |
433 | * so that it won't be recycled until the next buffer | |
434 | * is requested | |
435 | */ | |
436 | ||
437 | frame = audio->out + audio->out_tail; | |
438 | if (frame->used) { | |
439 | BUG_ON(frame->used == 0xffffffff); | |
440 | dprintk("frame %d busy\n", audio->out_tail); | |
441 | audplay_dsp_send_data_avail(audio, audio->out_tail, | |
442 | frame->used); | |
443 | frame->used = 0xffffffff; | |
444 | audio->out_needed = 0; | |
445 | } | |
446 | } | |
447 | done: | |
448 | spin_unlock_irqrestore(&audio->dsp_lock, flags); | |
449 | } | |
450 | ||
451 | /* ------------------- device --------------------- */ | |
452 | ||
453 | static void audevrc_flush(struct audio *audio) | |
454 | { | |
455 | audio->out[0].used = 0; | |
456 | audio->out[1].used = 0; | |
457 | audio->out_head = 0; | |
458 | audio->out_tail = 0; | |
459 | audio->stopped = 0; | |
460 | atomic_set(&audio->out_bytes, 0); | |
461 | } | |
462 | ||
463 | static void audevrc_flush_pcm_buf(struct audio *audio) | |
464 | { | |
465 | uint8_t index; | |
466 | ||
467 | for (index = 0; index < PCM_BUF_MAX_COUNT; index++) | |
468 | audio->in[index].used = 0; | |
469 | ||
470 | audio->read_next = 0; | |
471 | audio->fill_next = 0; | |
472 | } | |
473 | ||
474 | static long audevrc_ioctl(struct file *file, unsigned int cmd, | |
475 | unsigned long arg) | |
476 | { | |
477 | struct audio *audio = file->private_data; | |
478 | int rc = 0; | |
479 | ||
480 | dprintk("audevrc_ioctl() cmd = %d\n", cmd); | |
481 | ||
482 | if (cmd == AUDIO_GET_STATS) { | |
483 | struct msm_audio_stats stats; | |
484 | stats.byte_count = audpp_avsync_byte_count(audio->dec_id); | |
485 | stats.sample_count = audpp_avsync_sample_count(audio->dec_id); | |
486 | if (copy_to_user((void *)arg, &stats, sizeof(stats))) | |
487 | return -EFAULT; | |
488 | return 0; | |
489 | } | |
490 | if (cmd == AUDIO_SET_VOLUME) { | |
491 | unsigned long flags; | |
492 | spin_lock_irqsave(&audio->dsp_lock, flags); | |
493 | audio->volume = arg; | |
494 | if (audio->running) | |
495 | audpp_set_volume_and_pan(audio->dec_id, arg, 0); | |
496 | spin_unlock_irqrestore(&audio->dsp_lock, flags); | |
497 | return 0; | |
498 | } | |
499 | mutex_lock(&audio->lock); | |
500 | switch (cmd) { | |
501 | case AUDIO_START: | |
502 | rc = audevrc_enable(audio); | |
503 | break; | |
504 | case AUDIO_STOP: | |
505 | rc = audevrc_disable(audio); | |
506 | audio->stopped = 1; | |
507 | break; | |
508 | case AUDIO_SET_CONFIG:{ | |
509 | dprintk("AUDIO_SET_CONFIG not applicable \n"); | |
510 | break; | |
511 | } | |
512 | case AUDIO_GET_CONFIG:{ | |
513 | struct msm_audio_config config; | |
514 | config.buffer_size = BUFSZ; | |
515 | config.buffer_count = 2; | |
516 | config.sample_rate = 8000; | |
517 | config.channel_count = 1; | |
518 | config.unused[0] = 0; | |
519 | config.unused[1] = 0; | |
520 | config.unused[2] = 0; | |
521 | config.unused[3] = 0; | |
522 | if (copy_to_user((void *)arg, &config, sizeof(config))) | |
523 | rc = -EFAULT; | |
524 | else | |
525 | rc = 0; | |
526 | break; | |
527 | } | |
528 | case AUDIO_GET_PCM_CONFIG:{ | |
529 | struct msm_audio_pcm_config config; | |
530 | config.pcm_feedback = 0; | |
531 | config.buffer_count = PCM_BUF_MAX_COUNT; | |
532 | config.buffer_size = PCM_BUFSZ_MIN; | |
533 | if (copy_to_user((void *)arg, &config, sizeof(config))) | |
534 | rc = -EFAULT; | |
535 | else | |
536 | rc = 0; | |
537 | break; | |
538 | } | |
539 | case AUDIO_SET_PCM_CONFIG:{ | |
540 | struct msm_audio_pcm_config config; | |
541 | if (copy_from_user | |
542 | (&config, (void *)arg, sizeof(config))) { | |
543 | rc = -EFAULT; | |
544 | break; | |
545 | } | |
546 | if ((config.buffer_count > PCM_BUF_MAX_COUNT) || | |
547 | (config.buffer_count == 1)) | |
548 | config.buffer_count = PCM_BUF_MAX_COUNT; | |
549 | ||
550 | if (config.buffer_size < PCM_BUFSZ_MIN) | |
551 | config.buffer_size = PCM_BUFSZ_MIN; | |
552 | ||
553 | /* Check if pcm feedback is required */ | |
554 | if ((config.pcm_feedback) && (!audio->read_data)) { | |
555 | dprintk("audevrc_ioctl: allocate PCM buf %d\n", | |
556 | config.buffer_count * | |
557 | config.buffer_size); | |
558 | audio->read_data = | |
559 | dma_alloc_coherent(NULL, | |
560 | config.buffer_size * | |
561 | config.buffer_count, | |
562 | &audio->read_phys, | |
563 | GFP_KERNEL); | |
564 | if (!audio->read_data) { | |
565 | pr_err | |
566 | ("audevrc_ioctl: no mem for pcm buf\n"); | |
567 | rc = -1; | |
568 | } else { | |
569 | uint8_t index; | |
570 | uint32_t offset = 0; | |
571 | audio->pcm_feedback = 1; | |
572 | audio->buf_refresh = 0; | |
573 | audio->pcm_buf_count = | |
574 | config.buffer_count; | |
575 | audio->read_next = 0; | |
576 | audio->fill_next = 0; | |
577 | ||
578 | for (index = 0; | |
579 | index < config.buffer_count; | |
580 | index++) { | |
581 | audio->in[index].data = | |
582 | audio->read_data + offset; | |
583 | audio->in[index].addr = | |
584 | audio->read_phys + offset; | |
585 | audio->in[index].size = | |
586 | config.buffer_size; | |
587 | audio->in[index].used = 0; | |
588 | offset += config.buffer_size; | |
589 | } | |
590 | rc = 0; | |
591 | } | |
592 | } else { | |
593 | rc = 0; | |
594 | } | |
595 | break; | |
596 | } | |
597 | case AUDIO_PAUSE: | |
598 | dprintk("%s: AUDIO_PAUSE %ld\n", __func__, arg); | |
599 | rc = audpp_pause(audio->dec_id, (int) arg); | |
600 | break; | |
601 | default: | |
602 | rc = -EINVAL; | |
603 | } | |
604 | mutex_unlock(&audio->lock); | |
605 | return rc; | |
606 | } | |
607 | ||
608 | static ssize_t audevrc_read(struct file *file, char __user *buf, size_t count, | |
609 | loff_t *pos) | |
610 | { | |
611 | struct audio *audio = file->private_data; | |
612 | const char __user *start = buf; | |
613 | int rc = 0; | |
614 | if (!audio->pcm_feedback) { | |
615 | return 0; | |
616 | /* PCM feedback is not enabled. Nothing to read */ | |
617 | } | |
618 | mutex_lock(&audio->read_lock); | |
619 | dprintk("audevrc_read() \n"); | |
620 | while (count > 0) { | |
621 | rc = wait_event_interruptible(audio->read_wait, | |
622 | (audio->in[audio->read_next]. | |
623 | used > 0) || (audio->stopped)); | |
624 | dprintk("audevrc_read() wait terminated \n"); | |
625 | if (rc < 0) | |
626 | break; | |
627 | if (audio->stopped) { | |
628 | rc = -EBUSY; | |
629 | break; | |
630 | } | |
631 | if (count < audio->in[audio->read_next].used) { | |
632 | /* Read must happen in frame boundary. Since driver does | |
633 | * not know frame size, read count must be greater or | |
634 | * equal to size of PCM samples | |
635 | */ | |
636 | dprintk("audevrc_read:read stop - partial frame\n"); | |
637 | break; | |
638 | } else { | |
639 | dprintk("audevrc_read: read from in[%d]\n", | |
640 | audio->read_next); | |
641 | if (copy_to_user | |
642 | (buf, audio->in[audio->read_next].data, | |
643 | audio->in[audio->read_next].used)) { | |
644 | pr_err("audevrc_read: invalid addr %x \n", | |
645 | (unsigned int)buf); | |
646 | rc = -EFAULT; | |
647 | break; | |
648 | } | |
649 | count -= audio->in[audio->read_next].used; | |
650 | buf += audio->in[audio->read_next].used; | |
651 | audio->in[audio->read_next].used = 0; | |
652 | if ((++audio->read_next) == audio->pcm_buf_count) | |
653 | audio->read_next = 0; | |
654 | if (audio->in[audio->read_next].used == 0) | |
655 | break; /* No data ready at this moment | |
656 | * Exit while loop to prevent | |
657 | * output thread sleep too long | |
658 | */ | |
659 | ||
660 | } | |
661 | } | |
662 | if (audio->buf_refresh) { | |
663 | audio->buf_refresh = 0; | |
664 | dprintk("audevrc_read: kick start pcm feedback again\n"); | |
665 | audevrc_buffer_refresh(audio); | |
666 | } | |
667 | mutex_unlock(&audio->read_lock); | |
668 | if (buf > start) | |
669 | rc = buf - start; | |
670 | dprintk("audevrc_read: read %d bytes\n", rc); | |
671 | return rc; | |
672 | } | |
673 | ||
674 | static ssize_t audevrc_write(struct file *file, const char __user *buf, | |
675 | size_t count, loff_t *pos) | |
676 | { | |
677 | struct audio *audio = file->private_data; | |
678 | const char __user *start = buf; | |
679 | struct buffer *frame; | |
680 | size_t xfer; | |
681 | int rc = 0; | |
682 | ||
683 | if (count & 1) | |
684 | return -EINVAL; | |
685 | mutex_lock(&audio->write_lock); | |
686 | dprintk("audevrc_write() \n"); | |
687 | while (count > 0) { | |
688 | frame = audio->out + audio->out_head; | |
689 | rc = wait_event_interruptible(audio->write_wait, | |
690 | (frame->used == 0) | |
691 | || (audio->stopped)); | |
692 | if (rc < 0) | |
693 | break; | |
694 | if (audio->stopped) { | |
695 | rc = -EBUSY; | |
696 | break; | |
697 | } | |
698 | xfer = (count > frame->size) ? frame->size : count; | |
699 | if (copy_from_user(frame->data, buf, xfer)) { | |
700 | rc = -EFAULT; | |
701 | break; | |
702 | } | |
703 | ||
704 | frame->used = xfer; | |
705 | audio->out_head ^= 1; | |
706 | count -= xfer; | |
707 | buf += xfer; | |
708 | ||
709 | audevrc_send_data(audio, 0); | |
710 | ||
711 | } | |
712 | mutex_unlock(&audio->write_lock); | |
713 | if (buf > start) | |
714 | return buf - start; | |
715 | return rc; | |
716 | } | |
717 | ||
718 | static int audevrc_release(struct inode *inode, struct file *file) | |
719 | { | |
720 | struct audio *audio = file->private_data; | |
721 | ||
722 | dprintk("audevrc_release()\n"); | |
723 | ||
724 | mutex_lock(&audio->lock); | |
725 | audevrc_disable(audio); | |
726 | audevrc_flush(audio); | |
727 | audevrc_flush_pcm_buf(audio); | |
728 | msm_adsp_put(audio->audplay); | |
729 | audio->audplay = NULL; | |
730 | audio->opened = 0; | |
731 | dma_free_coherent(NULL, DMASZ, audio->data, audio->phys); | |
732 | audio->data = NULL; | |
733 | if (audio->read_data != NULL) { | |
734 | dma_free_coherent(NULL, | |
735 | audio->in[0].size * audio->pcm_buf_count, | |
736 | audio->read_data, audio->read_phys); | |
737 | audio->read_data = NULL; | |
738 | } | |
739 | audio->pcm_feedback = 0; | |
740 | mutex_unlock(&audio->lock); | |
741 | return 0; | |
742 | } | |
743 | ||
744 | static struct audio the_evrc_audio; | |
745 | ||
746 | static int audevrc_open(struct inode *inode, struct file *file) | |
747 | { | |
748 | struct audio *audio = &the_evrc_audio; | |
749 | int rc; | |
750 | ||
751 | if (audio->opened) { | |
752 | pr_err("audio: busy\n"); | |
753 | return -EBUSY; | |
754 | } | |
755 | ||
756 | /* Acquire Lock */ | |
757 | mutex_lock(&audio->lock); | |
758 | ||
759 | if (!audio->data) { | |
760 | audio->data = dma_alloc_coherent(NULL, DMASZ, | |
761 | &audio->phys, GFP_KERNEL); | |
762 | if (!audio->data) { | |
763 | pr_err("audio: could not allocate DMA buffers\n"); | |
764 | rc = -ENOMEM; | |
765 | goto dma_fail; | |
766 | } | |
767 | } | |
768 | ||
769 | rc = audmgr_open(&audio->audmgr); | |
770 | if (rc) | |
771 | goto audmgr_fail; | |
772 | ||
773 | rc = msm_adsp_get("AUDPLAY0TASK", &audio->audplay, | |
774 | &audplay_adsp_ops_evrc, audio); | |
775 | if (rc) { | |
776 | pr_err("audio: failed to get audplay0 dsp module\n"); | |
777 | goto adsp_fail; | |
778 | } | |
779 | ||
780 | audio->dec_id = 0; | |
781 | ||
782 | audio->out[0].data = audio->data + 0; | |
783 | audio->out[0].addr = audio->phys + 0; | |
784 | audio->out[0].size = BUFSZ; | |
785 | ||
786 | audio->out[1].data = audio->data + BUFSZ; | |
787 | audio->out[1].addr = audio->phys + BUFSZ; | |
788 | audio->out[1].size = BUFSZ; | |
789 | ||
790 | audio->volume = 0x3FFF; | |
791 | ||
792 | audevrc_flush(audio); | |
793 | ||
794 | audio->opened = 1; | |
795 | file->private_data = audio; | |
796 | ||
797 | mutex_unlock(&audio->lock); | |
798 | return rc; | |
799 | ||
800 | adsp_fail: | |
801 | audmgr_close(&audio->audmgr); | |
802 | audmgr_fail: | |
803 | dma_free_coherent(NULL, DMASZ, audio->data, audio->phys); | |
804 | dma_fail: | |
805 | mutex_unlock(&audio->lock); | |
806 | return rc; | |
807 | } | |
808 | ||
809 | static struct file_operations audio_evrc_fops = { | |
810 | .owner = THIS_MODULE, | |
811 | .open = audevrc_open, | |
812 | .release = audevrc_release, | |
813 | .read = audevrc_read, | |
814 | .write = audevrc_write, | |
815 | .unlocked_ioctl = audevrc_ioctl, | |
816 | }; | |
817 | ||
818 | struct miscdevice audio_evrc_misc = { | |
819 | .minor = MISC_DYNAMIC_MINOR, | |
820 | .name = "msm_evrc", | |
821 | .fops = &audio_evrc_fops, | |
822 | }; | |
823 | ||
824 | static int __init audevrc_init(void) | |
825 | { | |
826 | mutex_init(&the_evrc_audio.lock); | |
827 | mutex_init(&the_evrc_audio.write_lock); | |
828 | mutex_init(&the_evrc_audio.read_lock); | |
829 | spin_lock_init(&the_evrc_audio.dsp_lock); | |
830 | init_waitqueue_head(&the_evrc_audio.write_wait); | |
831 | init_waitqueue_head(&the_evrc_audio.read_wait); | |
832 | the_evrc_audio.read_data = NULL; | |
833 | return misc_register(&audio_evrc_misc); | |
834 | } | |
835 | ||
836 | static void __exit audevrc_exit(void) | |
837 | { | |
838 | misc_deregister(&audio_evrc_misc); | |
839 | } | |
840 | ||
841 | module_init(audevrc_init); | |
842 | module_exit(audevrc_exit); | |
843 | ||
844 | MODULE_DESCRIPTION("MSM EVRC driver"); | |
845 | MODULE_LICENSE("GPL v2"); | |
846 | MODULE_AUTHOR("QUALCOMM Inc"); |