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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / staging / dream / qdsp5 / audio_out.c
blob76d7fa5667d549dcfab4f8d921dee15a52a5ae12
1 /* arch/arm/mach-msm/qdsp5/audio_out.c
2 *
3 * pcm audio output device
4 *
5 * Copyright (C) 2008 Google, Inc.
6 * Copyright (C) 2008 HTC Corporation
7 *
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.
11 *
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.
16 *
17 */
18
19 #include <linux/module.h>
20 #include <linux/fs.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/debugfs.h>
27 #include <linux/delay.h>
28 #include <linux/wakelock.h>
29 #include <linux/gfp.h>
30
31 #include <linux/msm_audio.h>
32
33 #include <asm/atomic.h>
34 #include <asm/ioctls.h>
35 #include <mach/msm_adsp.h>
36
37 #include "audmgr.h"
38
39 #include <mach/qdsp5/qdsp5audppcmdi.h>
40 #include <mach/qdsp5/qdsp5audppmsg.h>
41
42 #include "evlog.h"
43
44 #define LOG_AUDIO_EVENTS 1
45 #define LOG_AUDIO_FAULTS 0
46
47 enum {
48 EV_NULL,
49 EV_OPEN,
50 EV_WRITE,
51 EV_RETURN,
52 EV_IOCTL,
53 EV_WRITE_WAIT,
54 EV_WAIT_EVENT,
55 EV_FILL_BUFFER,
56 EV_SEND_BUFFER,
57 EV_DSP_EVENT,
58 EV_ENABLE,
59 };
60
61 #if (LOG_AUDIO_EVENTS != 1)
62 static inline void LOG(unsigned id, unsigned arg) {}
63 #else
64 static const char *pcm_log_strings[] = {
65 "NULL",
66 "OPEN",
67 "WRITE",
68 "RETURN",
69 "IOCTL",
70 "WRITE_WAIT",
71 "WAIT_EVENT",
72 "FILL_BUFFER",
73 "SEND_BUFFER",
74 "DSP_EVENT",
75 "ENABLE",
76 };
77
78 DECLARE_LOG(pcm_log, 64, pcm_log_strings);
79
80 static int __init _pcm_log_init(void)
81 {
82 return ev_log_init(&pcm_log);
83 }
84 module_init(_pcm_log_init);
85
86 #define LOG(id,arg) ev_log_write(&pcm_log, id, arg)
87 #endif
88
89
90
91
92
93 #define BUFSZ (960 * 5)
94 #define DMASZ (BUFSZ * 2)
95
96 #define AUDPP_CMD_CFG_OBJ_UPDATE 0x8000
97 #define AUDPP_CMD_EQ_FLAG_DIS 0x0000
98 #define AUDPP_CMD_EQ_FLAG_ENA -1
99 #define AUDPP_CMD_IIR_FLAG_DIS 0x0000
100 #define AUDPP_CMD_IIR_FLAG_ENA -1
101
102 #define AUDPP_CMD_IIR_TUNING_FILTER 1
103 #define AUDPP_CMD_EQUALIZER 2
104 #define AUDPP_CMD_ADRC 3
105
106 #define ADRC_ENABLE 0x0001
107 #define EQ_ENABLE 0x0002
108 #define IIR_ENABLE 0x0004
109
110 struct adrc_filter {
111 uint16_t compression_th;
112 uint16_t compression_slope;
113 uint16_t rms_time;
114 uint16_t attack_const_lsw;
115 uint16_t attack_const_msw;
116 uint16_t release_const_lsw;
117 uint16_t release_const_msw;
118 uint16_t adrc_system_delay;
119 };
120
121 struct eqalizer {
122 uint16_t num_bands;
123 uint16_t eq_params[132];
124 };
125
126 struct rx_iir_filter {
127 uint16_t num_bands;
128 uint16_t iir_params[48];
129 };
130
131 typedef struct {
132 audpp_cmd_cfg_object_params_common common;
133 uint16_t eq_flag;
134 uint16_t num_bands;
135 uint16_t eq_params[132];
136 } audpp_cmd_cfg_object_params_eq;
137
138 typedef struct {
139 audpp_cmd_cfg_object_params_common common;
140 uint16_t active_flag;
141 uint16_t num_bands;
142 uint16_t iir_params[48];
143 } audpp_cmd_cfg_object_params_rx_iir;
144
145 struct buffer {
146 void *data;
147 unsigned size;
148 unsigned used;
149 unsigned addr;
150 };
151
152 struct audio {
153 struct buffer out[2];
154
155 spinlock_t dsp_lock;
156
157 uint8_t out_head;
158 uint8_t out_tail;
159 uint8_t out_needed; /* number of buffers the dsp is waiting for */
160
161 atomic_t out_bytes;
162
163 struct mutex lock;
164 struct mutex write_lock;
165 wait_queue_head_t wait;
166
167 /* configuration to use on next enable */
168 uint32_t out_sample_rate;
169 uint32_t out_channel_mode;
170 uint32_t out_weight;
171 uint32_t out_buffer_size;
172
173 struct audmgr audmgr;
174
175 /* data allocated for various buffers */
176 char *data;
177 dma_addr_t phys;
178
179 int opened;
180 int enabled;
181 int running;
182 int stopped; /* set when stopped, cleared on flush */
183 unsigned volume;
184
185 int adrc_enable;
186 struct adrc_filter adrc;
187
188 int eq_enable;
189 struct eqalizer eq;
190
191 int rx_iir_enable;
192 struct rx_iir_filter iir;
193 };
194
195 static void audio_prevent_sleep(struct audio *audio)
196 {
197 printk(KERN_INFO "++++++++++++++++++++++++++++++\n");
198 }
199
200 static void audio_allow_sleep(struct audio *audio)
201 {
202 printk(KERN_INFO "------------------------------\n");
203 }
204
205 static int audio_dsp_out_enable(struct audio *audio, int yes);
206 static int audio_dsp_send_buffer(struct audio *audio, unsigned id, unsigned len);
207 static int audio_dsp_set_adrc(struct audio *audio);
208 static int audio_dsp_set_eq(struct audio *audio);
209 static int audio_dsp_set_rx_iir(struct audio *audio);
210
211 static void audio_dsp_event(void *private, unsigned id, uint16_t *msg);
212
213 /* must be called with audio->lock held */
214 static int audio_enable(struct audio *audio)
215 {
216 struct audmgr_config cfg;
217 int rc;
218
219 pr_info("audio_enable()\n");
220
221 if (audio->enabled)
222 return 0;
223
224 /* refuse to start if we're not ready */
225 if (!audio->out[0].used || !audio->out[1].used)
226 return -EIO;
227
228 /* we start buffers 0 and 1, so buffer 0 will be the
229 * next one the dsp will want
230 */
231 audio->out_tail = 0;
232 audio->out_needed = 0;
233
234 cfg.tx_rate = RPC_AUD_DEF_SAMPLE_RATE_NONE;
235 cfg.rx_rate = RPC_AUD_DEF_SAMPLE_RATE_48000;
236 cfg.def_method = RPC_AUD_DEF_METHOD_HOST_PCM;
237 cfg.codec = RPC_AUD_DEF_CODEC_PCM;
238 cfg.snd_method = RPC_SND_METHOD_MIDI;
239
240 audio_prevent_sleep(audio);
241 rc = audmgr_enable(&audio->audmgr, &cfg);
242 if (rc < 0) {
243 audio_allow_sleep(audio);
244 return rc;
245 }
246
247 if (audpp_enable(-1, audio_dsp_event, audio)) {
248 pr_err("audio: audpp_enable() failed\n");
249 audmgr_disable(&audio->audmgr);
250 audio_allow_sleep(audio);
251 return -ENODEV;
252 }
253
254 audio->enabled = 1;
255 return 0;
256 }
257
258 /* must be called with audio->lock held */
259 static int audio_disable(struct audio *audio)
260 {
261 pr_info("audio_disable()\n");
262 if (audio->enabled) {
263 audio->enabled = 0;
264 audio_dsp_out_enable(audio, 0);
265
266 audpp_disable(-1, audio);
267
268 wake_up(&audio->wait);
269 audmgr_disable(&audio->audmgr);
270 audio->out_needed = 0;
271 audio_allow_sleep(audio);
272 }
273 return 0;
274 }
275
276 /* ------------------- dsp --------------------- */
277 static void audio_dsp_event(void *private, unsigned id, uint16_t *msg)
278 {
279 struct audio *audio = private;
280 struct buffer *frame;
281 unsigned long flags;
282
283 LOG(EV_DSP_EVENT, id);
284 switch (id) {
285 case AUDPP_MSG_HOST_PCM_INTF_MSG: {
286 unsigned id = msg[2];
287 unsigned idx = msg[3] - 1;
288
289 /* pr_info("audio_dsp_event: HOST_PCM id %d idx %d\n", id, idx); */
290 if (id != AUDPP_MSG_HOSTPCM_ID_ARM_RX) {
291 pr_err("bogus id\n");
292 break;
293 }
294 if (idx > 1) {
295 pr_err("bogus buffer idx\n");
296 break;
297 }
298
299 spin_lock_irqsave(&audio->dsp_lock, flags);
300 if (audio->running) {
301 atomic_add(audio->out[idx].used, &audio->out_bytes);
302 audio->out[idx].used = 0;
303
304 frame = audio->out + audio->out_tail;
305 if (frame->used) {
306 audio_dsp_send_buffer(
307 audio, audio->out_tail, frame->used);
308 audio->out_tail ^= 1;
309 } else {
310 audio->out_needed++;
311 }
312 wake_up(&audio->wait);
313 }
314 spin_unlock_irqrestore(&audio->dsp_lock, flags);
315 break;
316 }
317 case AUDPP_MSG_PCMDMAMISSED:
318 pr_info("audio_dsp_event: PCMDMAMISSED %d\n", msg[0]);
319 break;
320 case AUDPP_MSG_CFG_MSG:
321 if (msg[0] == AUDPP_MSG_ENA_ENA) {
322 LOG(EV_ENABLE, 1);
323 pr_info("audio_dsp_event: CFG_MSG ENABLE\n");
324 audio->out_needed = 0;
325 audio->running = 1;
326 audpp_set_volume_and_pan(5, audio->volume, 0);
327 audio_dsp_set_adrc(audio);
328 audio_dsp_set_eq(audio);
329 audio_dsp_set_rx_iir(audio);
330 audio_dsp_out_enable(audio, 1);
331 } else if (msg[0] == AUDPP_MSG_ENA_DIS) {
332 LOG(EV_ENABLE, 0);
333 pr_info("audio_dsp_event: CFG_MSG DISABLE\n");
334 audio->running = 0;
335 } else {
336 pr_err("audio_dsp_event: CFG_MSG %d?\n", msg[0]);
337 }
338 break;
339 default:
340 pr_err("audio_dsp_event: UNKNOWN (%d)\n", id);
341 }
342 }
343
344 static int audio_dsp_out_enable(struct audio *audio, int yes)
345 {
346 audpp_cmd_pcm_intf cmd;
347
348 memset(&cmd, 0, sizeof(cmd));
349 cmd.cmd_id = AUDPP_CMD_PCM_INTF_2;
350 cmd.object_num = AUDPP_CMD_PCM_INTF_OBJECT_NUM;
351 cmd.config = AUDPP_CMD_PCM_INTF_CONFIG_CMD_V;
352 cmd.intf_type = AUDPP_CMD_PCM_INTF_RX_ENA_ARMTODSP_V;
353
354 if (yes) {
355 cmd.write_buf1LSW = audio->out[0].addr;
356 cmd.write_buf1MSW = audio->out[0].addr >> 16;
357 cmd.write_buf1_len = audio->out[0].size;
358 cmd.write_buf2LSW = audio->out[1].addr;
359 cmd.write_buf2MSW = audio->out[1].addr >> 16;
360 cmd.write_buf2_len = audio->out[1].size;
361 cmd.arm_to_rx_flag = AUDPP_CMD_PCM_INTF_ENA_V;
362 cmd.weight_decoder_to_rx = audio->out_weight;
363 cmd.weight_arm_to_rx = 1;
364 cmd.partition_number_arm_to_dsp = 0;
365 cmd.sample_rate = audio->out_sample_rate;
366 cmd.channel_mode = audio->out_channel_mode;
367 }
368
369 return audpp_send_queue2(&cmd, sizeof(cmd));
370 }
371
372 static int audio_dsp_send_buffer(struct audio *audio, unsigned idx, unsigned len)
373 {
374 audpp_cmd_pcm_intf_send_buffer cmd;
375
376 cmd.cmd_id = AUDPP_CMD_PCM_INTF_2;
377 cmd.host_pcm_object = AUDPP_CMD_PCM_INTF_OBJECT_NUM;
378 cmd.config = AUDPP_CMD_PCM_INTF_BUFFER_CMD_V;
379 cmd.intf_type = AUDPP_CMD_PCM_INTF_RX_ENA_ARMTODSP_V;
380 cmd.dsp_to_arm_buf_id = 0;
381 cmd.arm_to_dsp_buf_id = idx + 1;
382 cmd.arm_to_dsp_buf_len = len;
383
384 LOG(EV_SEND_BUFFER, idx);
385 return audpp_send_queue2(&cmd, sizeof(cmd));
386 }
387
388 static int audio_dsp_set_adrc(struct audio *audio)
389 {
390 audpp_cmd_cfg_object_params_adrc cmd;
391
392 memset(&cmd, 0, sizeof(cmd));
393 cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE;
394 cmd.common.command_type = AUDPP_CMD_ADRC;
395
396 if (audio->adrc_enable) {
397 cmd.adrc_flag = AUDPP_CMD_ADRC_FLAG_ENA;
398 cmd.compression_th = audio->adrc.compression_th;
399 cmd.compression_slope = audio->adrc.compression_slope;
400 cmd.rms_time = audio->adrc.rms_time;
401 cmd.attack_const_lsw = audio->adrc.attack_const_lsw;
402 cmd.attack_const_msw = audio->adrc.attack_const_msw;
403 cmd.release_const_lsw = audio->adrc.release_const_lsw;
404 cmd.release_const_msw = audio->adrc.release_const_msw;
405 cmd.adrc_system_delay = audio->adrc.adrc_system_delay;
406 } else {
407 cmd.adrc_flag = AUDPP_CMD_ADRC_FLAG_DIS;
408 }
409 return audpp_send_queue3(&cmd, sizeof(cmd));
410 }
411
412 static int audio_dsp_set_eq(struct audio *audio)
413 {
414 audpp_cmd_cfg_object_params_eq cmd;
415
416 memset(&cmd, 0, sizeof(cmd));
417 cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE;
418 cmd.common.command_type = AUDPP_CMD_EQUALIZER;
419
420 if (audio->eq_enable) {
421 cmd.eq_flag = AUDPP_CMD_EQ_FLAG_ENA;
422 cmd.num_bands = audio->eq.num_bands;
423 memcpy(&cmd.eq_params, audio->eq.eq_params,
424 sizeof(audio->eq.eq_params));
425 } else {
426 cmd.eq_flag = AUDPP_CMD_EQ_FLAG_DIS;
427 }
428 return audpp_send_queue3(&cmd, sizeof(cmd));
429 }
430
431 static int audio_dsp_set_rx_iir(struct audio *audio)
432 {
433 audpp_cmd_cfg_object_params_rx_iir cmd;
434
435 memset(&cmd, 0, sizeof(cmd));
436 cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE;
437 cmd.common.command_type = AUDPP_CMD_IIR_TUNING_FILTER;
438
439 if (audio->rx_iir_enable) {
440 cmd.active_flag = AUDPP_CMD_IIR_FLAG_ENA;
441 cmd.num_bands = audio->iir.num_bands;
442 memcpy(&cmd.iir_params, audio->iir.iir_params,
443 sizeof(audio->iir.iir_params));
444 } else {
445 cmd.active_flag = AUDPP_CMD_IIR_FLAG_DIS;
446 }
447
448 return audpp_send_queue3(&cmd, sizeof(cmd));
449 }
450
451 /* ------------------- device --------------------- */
452
453 static int audio_enable_adrc(struct audio *audio, int enable)
454 {
455 if (audio->adrc_enable != enable) {
456 audio->adrc_enable = enable;
457 if (audio->running)
458 audio_dsp_set_adrc(audio);
459 }
460 return 0;
461 }
462
463 static int audio_enable_eq(struct audio *audio, int enable)
464 {
465 if (audio->eq_enable != enable) {
466 audio->eq_enable = enable;
467 if (audio->running)
468 audio_dsp_set_eq(audio);
469 }
470 return 0;
471 }
472
473 static int audio_enable_rx_iir(struct audio *audio, int enable)
474 {
475 if (audio->rx_iir_enable != enable) {
476 audio->rx_iir_enable = enable;
477 if (audio->running)
478 audio_dsp_set_rx_iir(audio);
479 }
480 return 0;
481 }
482
483 static void audio_flush(struct audio *audio)
484 {
485 audio->out[0].used = 0;
486 audio->out[1].used = 0;
487 audio->out_head = 0;
488 audio->out_tail = 0;
489 audio->stopped = 0;
490 }
491
492 static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
493 {
494 struct audio *audio = file->private_data;
495 int rc;
496
497 if (cmd == AUDIO_GET_STATS) {
498 struct msm_audio_stats stats;
499 stats.byte_count = atomic_read(&audio->out_bytes);
500 if (copy_to_user((void*) arg, &stats, sizeof(stats)))
501 return -EFAULT;
502 return 0;
503 }
504 if (cmd == AUDIO_SET_VOLUME) {
505 unsigned long flags;
506 spin_lock_irqsave(&audio->dsp_lock, flags);
507 audio->volume = arg;
508 if (audio->running)
509 audpp_set_volume_and_pan(6, arg, 0);
510 spin_unlock_irqrestore(&audio->dsp_lock, flags);
511 }
512
513 LOG(EV_IOCTL, cmd);
514 mutex_lock(&audio->lock);
515 switch (cmd) {
516 case AUDIO_START:
517 rc = audio_enable(audio);
518 break;
519 case AUDIO_STOP:
520 rc = audio_disable(audio);
521 audio->stopped = 1;
522 break;
523 case AUDIO_FLUSH:
524 if (audio->stopped) {
525 /* Make sure we're stopped and we wake any threads
526 * that might be blocked holding the write_lock.
527 * While audio->stopped write threads will always
528 * exit immediately.
529 */
530 wake_up(&audio->wait);
531 mutex_lock(&audio->write_lock);
532 audio_flush(audio);
533 mutex_unlock(&audio->write_lock);
534 }
535 case AUDIO_SET_CONFIG: {
536 struct msm_audio_config config;
537 if (copy_from_user(&config, (void*) arg, sizeof(config))) {
538 rc = -EFAULT;
539 break;
540 }
541 if (config.channel_count == 1) {
542 config.channel_count = AUDPP_CMD_PCM_INTF_MONO_V;
543 } else if (config.channel_count == 2) {
544 config.channel_count= AUDPP_CMD_PCM_INTF_STEREO_V;
545 } else {
546 rc = -EINVAL;
547 break;
548 }
549 audio->out_sample_rate = config.sample_rate;
550 audio->out_channel_mode = config.channel_count;
551 rc = 0;
552 break;
553 }
554 case AUDIO_GET_CONFIG: {
555 struct msm_audio_config config;
556 config.buffer_size = BUFSZ;
557 config.buffer_count = 2;
558 config.sample_rate = audio->out_sample_rate;
559 if (audio->out_channel_mode == AUDPP_CMD_PCM_INTF_MONO_V) {
560 config.channel_count = 1;
561 } else {
562 config.channel_count = 2;
563 }
564 config.unused[0] = 0;
565 config.unused[1] = 0;
566 config.unused[2] = 0;
567 config.unused[3] = 0;
568 if (copy_to_user((void*) arg, &config, sizeof(config))) {
569 rc = -EFAULT;
570 } else {
571 rc = 0;
572 }
573 break;
574 }
575 default:
576 rc = -EINVAL;
577 }
578 mutex_unlock(&audio->lock);
579 return rc;
580 }
581
582 static ssize_t audio_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
583 {
584 return -EINVAL;
585 }
586
587 static inline int rt_policy(int policy)
588 {
589 if (unlikely(policy == SCHED_FIFO) || unlikely(policy == SCHED_RR))
590 return 1;
591 return 0;
592 }
593
594 static inline int task_has_rt_policy(struct task_struct *p)
595 {
596 return rt_policy(p->policy);
597 }
598
599 static ssize_t audio_write(struct file *file, const char __user *buf,
600 size_t count, loff_t *pos)
601 {
602 struct sched_param s = { .sched_priority = 1 };
603 struct audio *audio = file->private_data;
604 unsigned long flags;
605 const char __user *start = buf;
606 struct buffer *frame;
607 size_t xfer;
608 int old_prio = current->rt_priority;
609 int old_policy = current->policy;
610 int cap_nice = cap_raised(current_cap(), CAP_SYS_NICE);
611 int rc = 0;
612
613 LOG(EV_WRITE, count | (audio->running << 28) | (audio->stopped << 24));
614
615 /* just for this write, set us real-time */
616 if (!task_has_rt_policy(current)) {
617 struct cred *new = prepare_creds();
618 cap_raise(new->cap_effective, CAP_SYS_NICE);
619 commit_creds(new);
620 sched_setscheduler(current, SCHED_RR, &s);
621 }
622
623 mutex_lock(&audio->write_lock);
624 while (count > 0) {
625 frame = audio->out + audio->out_head;
626
627 LOG(EV_WAIT_EVENT, 0);
628 rc = wait_event_interruptible(audio->wait,
629 (frame->used == 0) || (audio->stopped));
630 LOG(EV_WAIT_EVENT, 1);
631
632 if (rc < 0)
633 break;
634 if (audio->stopped) {
635 rc = -EBUSY;
636 break;
637 }
638 xfer = count > frame->size ? frame->size : count;
639 if (copy_from_user(frame->data, buf, xfer)) {
640 rc = -EFAULT;
641 break;
642 }
643 frame->used = xfer;
644 audio->out_head ^= 1;
645 count -= xfer;
646 buf += xfer;
647
648 spin_lock_irqsave(&audio->dsp_lock, flags);
649 LOG(EV_FILL_BUFFER, audio->out_head ^ 1);
650 frame = audio->out + audio->out_tail;
651 if (frame->used && audio->out_needed) {
652 audio_dsp_send_buffer(audio, audio->out_tail, frame->used);
653 audio->out_tail ^= 1;
654 audio->out_needed--;
655 }
656 spin_unlock_irqrestore(&audio->dsp_lock, flags);
657 }
658
659 mutex_unlock(&audio->write_lock);
660
661 /* restore scheduling policy and priority */
662 if (!rt_policy(old_policy)) {
663 struct sched_param v = { .sched_priority = old_prio };
664 sched_setscheduler(current, old_policy, &v);
665 if (likely(!cap_nice)) {
666 struct cred *new = prepare_creds();
667 cap_lower(new->cap_effective, CAP_SYS_NICE);
668 commit_creds(new);
669 sched_setscheduler(current, SCHED_RR, &s);
670 }
671 }
672
673 LOG(EV_RETURN,(buf > start) ? (buf - start) : rc);
674 if (buf > start)
675 return buf - start;
676 return rc;
677 }
678
679 static int audio_release(struct inode *inode, struct file *file)
680 {
681 struct audio *audio = file->private_data;
682
683 LOG(EV_OPEN, 0);
684 mutex_lock(&audio->lock);
685 audio_disable(audio);
686 audio_flush(audio);
687 audio->opened = 0;
688 mutex_unlock(&audio->lock);
689 return 0;
690 }
691
692 static struct audio the_audio;
693
694 static int audio_open(struct inode *inode, struct file *file)
695 {
696 struct audio *audio = &the_audio;
697 int rc;
698
699 mutex_lock(&audio->lock);
700
701 if (audio->opened) {
702 pr_err("audio: busy\n");
703 rc = -EBUSY;
704 goto done;
705 }
706
707 if (!audio->data) {
708 audio->data = dma_alloc_coherent(NULL, DMASZ,
709 &audio->phys, GFP_KERNEL);
710 if (!audio->data) {
711 pr_err("audio: could not allocate DMA buffers\n");
712 rc = -ENOMEM;
713 goto done;
714 }
715 }
716
717 rc = audmgr_open(&audio->audmgr);
718 if (rc)
719 goto done;
720
721 audio->out_buffer_size = BUFSZ;
722 audio->out_sample_rate = 44100;
723 audio->out_channel_mode = AUDPP_CMD_PCM_INTF_STEREO_V;
724 audio->out_weight = 100;
725
726 audio->out[0].data = audio->data + 0;
727 audio->out[0].addr = audio->phys + 0;
728 audio->out[0].size = BUFSZ;
729
730 audio->out[1].data = audio->data + BUFSZ;
731 audio->out[1].addr = audio->phys + BUFSZ;
732 audio->out[1].size = BUFSZ;
733
734 audio->volume = 0x2000;
735
736 audio_flush(audio);
737
738 file->private_data = audio;
739 audio->opened = 1;
740 rc = 0;
741 LOG(EV_OPEN, 1);
742 done:
743 mutex_unlock(&audio->lock);
744 return rc;
745 }
746
747 static long audpp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
748 {
749 struct audio *audio = file->private_data;
750 int rc = 0, enable;
751 uint16_t enable_mask;
752
753 mutex_lock(&audio->lock);
754 switch (cmd) {
755 case AUDIO_ENABLE_AUDPP:
756 if (copy_from_user(&enable_mask, (void *) arg, sizeof(enable_mask)))
757 goto out_fault;
758
759 enable = (enable_mask & ADRC_ENABLE)? 1 : 0;
760 audio_enable_adrc(audio, enable);
761 enable = (enable_mask & EQ_ENABLE)? 1 : 0;
762 audio_enable_eq(audio, enable);
763 enable = (enable_mask & IIR_ENABLE)? 1 : 0;
764 audio_enable_rx_iir(audio, enable);
765 break;
766
767 case AUDIO_SET_ADRC:
768 if (copy_from_user(&audio->adrc, (void*) arg, sizeof(audio->adrc)))
769 goto out_fault;
770 break;
771
772 case AUDIO_SET_EQ:
773 if (copy_from_user(&audio->eq, (void*) arg, sizeof(audio->eq)))
774 goto out_fault;
775 break;
776
777 case AUDIO_SET_RX_IIR:
778 if (copy_from_user(&audio->iir, (void*) arg, sizeof(audio->iir)))
779 goto out_fault;
780 break;
781
782 default:
783 rc = -EINVAL;
784 }
785
786 goto out;
787
788 out_fault:
789 rc = -EFAULT;
790 out:
791 mutex_unlock(&audio->lock);
792 return rc;
793 }
794
795 static int audpp_open(struct inode *inode, struct file *file)
796 {
797 struct audio *audio = &the_audio;
798
799 file->private_data = audio;
800 return 0;
801 }
802
803 static struct file_operations audio_fops = {
804 .owner = THIS_MODULE,
805 .open = audio_open,
806 .release = audio_release,
807 .read = audio_read,
808 .write = audio_write,
809 .unlocked_ioctl = audio_ioctl,
810 };
811
812 static struct file_operations audpp_fops = {
813 .owner = THIS_MODULE,
814 .open = audpp_open,
815 .unlocked_ioctl = audpp_ioctl,
816 };
817
818 struct miscdevice audio_misc = {
819 .minor = MISC_DYNAMIC_MINOR,
820 .name = "msm_pcm_out",
821 .fops = &audio_fops,
822 };
823
824 struct miscdevice audpp_misc = {
825 .minor = MISC_DYNAMIC_MINOR,
826 .name = "msm_pcm_ctl",
827 .fops = &audpp_fops,
828 };
829
830 static int __init audio_init(void)
831 {
832 mutex_init(&the_audio.lock);
833 mutex_init(&the_audio.write_lock);
834 spin_lock_init(&the_audio.dsp_lock);
835 init_waitqueue_head(&the_audio.wait);
836 return (misc_register(&audio_misc) || misc_register(&audpp_misc));
837 }
838
839 device_initcall(audio_init);
Tomato firmware and modifications.