1 /* arch/arm/mach-msm/qdsp5/audio_out.c
3 * pcm 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/debugfs.h>
27 #include <linux/delay.h>
28 #include <linux/wakelock.h>
29 #include <linux/gfp.h>
31 #include <linux/msm_audio.h>
33 #include <asm/atomic.h>
34 #include <asm/ioctls.h>
35 #include <mach/msm_adsp.h>
39 #include <mach/qdsp5/qdsp5audppcmdi.h>
40 #include <mach/qdsp5/qdsp5audppmsg.h>
44 #define LOG_AUDIO_EVENTS 1
45 #define LOG_AUDIO_FAULTS 0
61 #if (LOG_AUDIO_EVENTS != 1)
62 static inline void LOG(unsigned id, unsigned arg) {}
64 static const char *pcm_log_strings[] = {
78 DECLARE_LOG(pcm_log, 64, pcm_log_strings);
80 static int __init _pcm_log_init(void)
82 return ev_log_init(&pcm_log);
84 module_init(_pcm_log_init);
86 #define LOG(id,arg) ev_log_write(&pcm_log, id, arg)
93 #define BUFSZ (960 * 5)
94 #define DMASZ (BUFSZ * 2)
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
102 #define AUDPP_CMD_IIR_TUNING_FILTER 1
103 #define AUDPP_CMD_EQUALIZER 2
104 #define AUDPP_CMD_ADRC 3
106 #define ADRC_ENABLE 0x0001
107 #define EQ_ENABLE 0x0002
108 #define IIR_ENABLE 0x0004
111 uint16_t compression_th;
112 uint16_t compression_slope;
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;
123 uint16_t eq_params[132];
126 struct rx_iir_filter {
128 uint16_t iir_params[48];
132 audpp_cmd_cfg_object_params_common common;
135 uint16_t eq_params[132];
136 } audpp_cmd_cfg_object_params_eq;
139 audpp_cmd_cfg_object_params_common common;
140 uint16_t active_flag;
142 uint16_t iir_params[48];
143 } audpp_cmd_cfg_object_params_rx_iir;
153 struct buffer out[2];
159 uint8_t out_needed; /* number of buffers the dsp is waiting for */
164 struct mutex write_lock;
165 wait_queue_head_t wait;
167 /* configuration to use on next enable */
168 uint32_t out_sample_rate;
169 uint32_t out_channel_mode;
171 uint32_t out_buffer_size;
173 struct audmgr audmgr;
175 /* data allocated for various buffers */
182 int stopped; /* set when stopped, cleared on flush */
186 struct adrc_filter adrc;
192 struct rx_iir_filter iir;
195 static void audio_prevent_sleep(struct audio *audio)
197 printk(KERN_INFO "++++++++++++++++++++++++++++++\n");
200 static void audio_allow_sleep(struct audio *audio)
202 printk(KERN_INFO "------------------------------\n");
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);
211 static void audio_dsp_event(void *private, unsigned id, uint16_t *msg);
213 /* must be called with audio->lock held */
214 static int audio_enable(struct audio *audio)
216 struct audmgr_config cfg;
219 pr_info("audio_enable()\n");
224 /* refuse to start if we're not ready */
225 if (!audio->out[0].used || !audio->out[1].used)
228 /* we start buffers 0 and 1, so buffer 0 will be the
229 * next one the dsp will want
232 audio->out_needed = 0;
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;
240 audio_prevent_sleep(audio);
241 rc = audmgr_enable(&audio->audmgr, &cfg);
243 audio_allow_sleep(audio);
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);
258 /* must be called with audio->lock held */
259 static int audio_disable(struct audio *audio)
261 pr_info("audio_disable()\n");
262 if (audio->enabled) {
264 audio_dsp_out_enable(audio, 0);
266 audpp_disable(-1, audio);
268 wake_up(&audio->wait);
269 audmgr_disable(&audio->audmgr);
270 audio->out_needed = 0;
271 audio_allow_sleep(audio);
276 /* ------------------- dsp --------------------- */
277 static void audio_dsp_event(void *private, unsigned id, uint16_t *msg)
279 struct audio *audio = private;
280 struct buffer *frame;
283 LOG(EV_DSP_EVENT, id);
285 case AUDPP_MSG_HOST_PCM_INTF_MSG: {
286 unsigned id = msg[2];
287 unsigned idx = msg[3] - 1;
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");
295 pr_err("bogus buffer idx\n");
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;
304 frame = audio->out + audio->out_tail;
306 audio_dsp_send_buffer(
307 audio, audio->out_tail, frame->used);
308 audio->out_tail ^= 1;
312 wake_up(&audio->wait);
314 spin_unlock_irqrestore(&audio->dsp_lock, flags);
317 case AUDPP_MSG_PCMDMAMISSED:
318 pr_info("audio_dsp_event: PCMDMAMISSED %d\n", msg[0]);
320 case AUDPP_MSG_CFG_MSG:
321 if (msg[0] == AUDPP_MSG_ENA_ENA) {
323 pr_info("audio_dsp_event: CFG_MSG ENABLE\n");
324 audio->out_needed = 0;
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) {
333 pr_info("audio_dsp_event: CFG_MSG DISABLE\n");
336 pr_err("audio_dsp_event: CFG_MSG %d?\n", msg[0]);
340 pr_err("audio_dsp_event: UNKNOWN (%d)\n", id);
344 static int audio_dsp_out_enable(struct audio *audio, int yes)
346 audpp_cmd_pcm_intf cmd;
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;
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;
369 return audpp_send_queue2(&cmd, sizeof(cmd));
372 static int audio_dsp_send_buffer(struct audio *audio, unsigned idx, unsigned len)
374 audpp_cmd_pcm_intf_send_buffer cmd;
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;
384 LOG(EV_SEND_BUFFER, idx);
385 return audpp_send_queue2(&cmd, sizeof(cmd));
388 static int audio_dsp_set_adrc(struct audio *audio)
390 audpp_cmd_cfg_object_params_adrc cmd;
392 memset(&cmd, 0, sizeof(cmd));
393 cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE;
394 cmd.common.command_type = AUDPP_CMD_ADRC;
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;
407 cmd.adrc_flag = AUDPP_CMD_ADRC_FLAG_DIS;
409 return audpp_send_queue3(&cmd, sizeof(cmd));
412 static int audio_dsp_set_eq(struct audio *audio)
414 audpp_cmd_cfg_object_params_eq cmd;
416 memset(&cmd, 0, sizeof(cmd));
417 cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE;
418 cmd.common.command_type = AUDPP_CMD_EQUALIZER;
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));
426 cmd.eq_flag = AUDPP_CMD_EQ_FLAG_DIS;
428 return audpp_send_queue3(&cmd, sizeof(cmd));
431 static int audio_dsp_set_rx_iir(struct audio *audio)
433 audpp_cmd_cfg_object_params_rx_iir cmd;
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;
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));
445 cmd.active_flag = AUDPP_CMD_IIR_FLAG_DIS;
448 return audpp_send_queue3(&cmd, sizeof(cmd));
451 /* ------------------- device --------------------- */
453 static int audio_enable_adrc(struct audio *audio, int enable)
455 if (audio->adrc_enable != enable) {
456 audio->adrc_enable = enable;
458 audio_dsp_set_adrc(audio);
463 static int audio_enable_eq(struct audio *audio, int enable)
465 if (audio->eq_enable != enable) {
466 audio->eq_enable = enable;
468 audio_dsp_set_eq(audio);
473 static int audio_enable_rx_iir(struct audio *audio, int enable)
475 if (audio->rx_iir_enable != enable) {
476 audio->rx_iir_enable = enable;
478 audio_dsp_set_rx_iir(audio);
483 static void audio_flush(struct audio *audio)
485 audio->out[0].used = 0;
486 audio->out[1].used = 0;
492 static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
494 struct audio *audio = file->private_data;
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)))
504 if (cmd == AUDIO_SET_VOLUME) {
506 spin_lock_irqsave(&audio->dsp_lock, flags);
509 audpp_set_volume_and_pan(6, arg, 0);
510 spin_unlock_irqrestore(&audio->dsp_lock, flags);
514 mutex_lock(&audio->lock);
517 rc = audio_enable(audio);
520 rc = audio_disable(audio);
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
530 wake_up(&audio->wait);
531 mutex_lock(&audio->write_lock);
533 mutex_unlock(&audio->write_lock);
535 case AUDIO_SET_CONFIG: {
536 struct msm_audio_config config;
537 if (copy_from_user(&config, (void*) arg, sizeof(config))) {
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;
549 audio->out_sample_rate = config.sample_rate;
550 audio->out_channel_mode = config.channel_count;
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;
562 config.channel_count = 2;
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))) {
578 mutex_unlock(&audio->lock);
582 static ssize_t audio_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
587 static inline int rt_policy(int policy)
589 if (unlikely(policy == SCHED_FIFO) || unlikely(policy == SCHED_RR))
594 static inline int task_has_rt_policy(struct task_struct *p)
596 return rt_policy(p->policy);
599 static ssize_t audio_write(struct file *file, const char __user *buf,
600 size_t count, loff_t *pos)
602 struct sched_param s = { .sched_priority = 1 };
603 struct audio *audio = file->private_data;
605 const char __user *start = buf;
606 struct buffer *frame;
608 int old_prio = current->rt_priority;
609 int old_policy = current->policy;
610 int cap_nice = cap_raised(current_cap(), CAP_SYS_NICE);
613 LOG(EV_WRITE, count | (audio->running << 28) | (audio->stopped << 24));
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);
620 sched_setscheduler(current, SCHED_RR, &s);
623 mutex_lock(&audio->write_lock);
625 frame = audio->out + audio->out_head;
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);
634 if (audio->stopped) {
638 xfer = count > frame->size ? frame->size : count;
639 if (copy_from_user(frame->data, buf, xfer)) {
644 audio->out_head ^= 1;
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;
656 spin_unlock_irqrestore(&audio->dsp_lock, flags);
659 mutex_unlock(&audio->write_lock);
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);
669 sched_setscheduler(current, SCHED_RR, &s);
673 LOG(EV_RETURN,(buf > start) ? (buf - start) : rc);
679 static int audio_release(struct inode *inode, struct file *file)
681 struct audio *audio = file->private_data;
684 mutex_lock(&audio->lock);
685 audio_disable(audio);
688 mutex_unlock(&audio->lock);
692 static struct audio the_audio;
694 static int audio_open(struct inode *inode, struct file *file)
696 struct audio *audio = &the_audio;
699 mutex_lock(&audio->lock);
702 pr_err("audio: busy\n");
708 audio->data = dma_alloc_coherent(NULL, DMASZ,
709 &audio->phys, GFP_KERNEL);
711 pr_err("audio: could not allocate DMA buffers\n");
717 rc = audmgr_open(&audio->audmgr);
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;
726 audio->out[0].data = audio->data + 0;
727 audio->out[0].addr = audio->phys + 0;
728 audio->out[0].size = BUFSZ;
730 audio->out[1].data = audio->data + BUFSZ;
731 audio->out[1].addr = audio->phys + BUFSZ;
732 audio->out[1].size = BUFSZ;
734 audio->volume = 0x2000;
738 file->private_data = audio;
743 mutex_unlock(&audio->lock);
747 static long audpp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
749 struct audio *audio = file->private_data;
751 uint16_t enable_mask;
753 mutex_lock(&audio->lock);
755 case AUDIO_ENABLE_AUDPP:
756 if (copy_from_user(&enable_mask, (void *) arg, sizeof(enable_mask)))
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);
768 if (copy_from_user(&audio->adrc, (void*) arg, sizeof(audio->adrc)))
773 if (copy_from_user(&audio->eq, (void*) arg, sizeof(audio->eq)))
777 case AUDIO_SET_RX_IIR:
778 if (copy_from_user(&audio->iir, (void*) arg, sizeof(audio->iir)))
791 mutex_unlock(&audio->lock);
795 static int audpp_open(struct inode *inode, struct file *file)
797 struct audio *audio = &the_audio;
799 file->private_data = audio;
803 static struct file_operations audio_fops = {
804 .owner = THIS_MODULE,
806 .release = audio_release,
808 .write = audio_write,
809 .unlocked_ioctl = audio_ioctl,
812 static struct file_operations audpp_fops = {
813 .owner = THIS_MODULE,
815 .unlocked_ioctl = audpp_ioctl,
818 struct miscdevice audio_misc = {
819 .minor = MISC_DYNAMIC_MINOR,
820 .name = "msm_pcm_out",
824 struct miscdevice audpp_misc = {
825 .minor = MISC_DYNAMIC_MINOR,
826 .name = "msm_pcm_ctl",
830 static int __init audio_init(void)
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));
839 device_initcall(audio_init);