M7350/kernel/arch/arm/mach-msm/qdsp6/pcm_out.c

277 lines
6.6 KiB
C
Raw Normal View History

2024-09-09 08:52:07 +00:00
/* arch/arm/mach-msm/qdsp6/pcm_out.c
*
* Copyright (C) 2009 Google, Inc.
* Author: Brian Swetland <swetland@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/uaccess.h>
#include <linux/msm_audio.h>
#include <mach/msm_qdsp6_audio.h>
#include <mach/debug_mm.h>
void audio_client_dump(struct audio_client *ac);
#define BUFSZ (3072)
struct pcm {
struct mutex lock;
struct audio_client *ac;
uint32_t sample_rate;
uint32_t channel_count;
size_t buffer_size;
};
static long pcm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct pcm *pcm = file->private_data;
int rc = 0;
if (cmd == AUDIO_GET_STATS) {
struct msm_audio_stats stats;
memset(&stats, 0, sizeof(stats));
if (copy_to_user((void*) arg, &stats, sizeof(stats)))
return -EFAULT;
return 0;
}
mutex_lock(&pcm->lock);
switch (cmd) {
case AUDIO_SET_VOLUME: {
int vol;
if (!pcm->ac) {
pr_err("%s: cannot set volume before AUDIO_START!\n",
__func__);
rc = -EINVAL;
break;
}
if (copy_from_user(&vol, (void*) arg, sizeof(vol))) {
rc = -EFAULT;
break;
}
pr_debug("[%s:%s] SET_VOLUME: vol = %d\n", __MM_FILE__,
__func__, vol);
rc = q6audio_set_stream_volume(pcm->ac, vol);
break;
}
case AUDIO_START: {
uint32_t acdb_id;
pr_debug("[%s:%s] AUDIO_START\n", __MM_FILE__, __func__);
if (arg == 0) {
acdb_id = 0;
} else if (copy_from_user(&acdb_id, (void*) arg, sizeof(acdb_id))) {
pr_info("[%s:%s] copy acdb_id from user failed\n",
__MM_FILE__, __func__);
rc = -EFAULT;
break;
}
if (pcm->ac) {
pr_err("[%s:%s] active session already existing\n",
__MM_FILE__, __func__);
rc = -EBUSY;
} else {
pcm->ac = q6audio_open_pcm(pcm->buffer_size,
pcm->sample_rate,
pcm->channel_count,
AUDIO_FLAG_WRITE, acdb_id);
if (!pcm->ac) {
pr_err("[%s:%s] pcm open session failed\n",
__MM_FILE__, __func__);
rc = -ENOMEM;
}
}
break;
}
case AUDIO_STOP:
pr_debug("[%s:%s] AUDIO_STOP\n", __MM_FILE__, __func__);
break;
case AUDIO_FLUSH:
break;
case AUDIO_SET_CONFIG: {
struct msm_audio_config config;
if (pcm->ac) {
rc = -EBUSY;
pr_err("[%s:%s] active session already existing\n",
__MM_FILE__, __func__);
break;
}
if (copy_from_user(&config, (void*) arg, sizeof(config))) {
rc = -EFAULT;
break;
}
pr_debug("[%s:%s] SET_CONFIG: samplerate = %d, channels = %d\n",
__MM_FILE__, __func__, config.sample_rate,
config.channel_count);
if (config.channel_count < 1 || config.channel_count > 2) {
rc = -EINVAL;
pr_err("[%s:%s] invalid channelcount %d\n",
__MM_FILE__, __func__, config.channel_count);
break;
}
if (config.sample_rate < 8000 || config.sample_rate > 48000) {
rc = -EINVAL;
pr_err("[%s:%s] invalid samplerate %d\n", __MM_FILE__,
__func__, config.sample_rate);
break;
}
if (config.buffer_size < 128 || config.buffer_size > 8192) {
rc = -EINVAL;
pr_err("[%s:%s] invalid buffsize %d\n", __MM_FILE__,
__func__, config.buffer_size);
break;
}
pcm->sample_rate = config.sample_rate;
pcm->channel_count = config.channel_count;
pcm->buffer_size = config.buffer_size;
break;
}
case AUDIO_GET_CONFIG: {
struct msm_audio_config config;
config.buffer_size = pcm->buffer_size;
config.buffer_count = 2;
config.sample_rate = pcm->sample_rate;
config.channel_count = pcm->channel_count;
config.unused[0] = 0;
config.unused[1] = 0;
config.unused[2] = 0;
if (copy_to_user((void*) arg, &config, sizeof(config))) {
rc = -EFAULT;
}
pr_debug("[%s:%s] GET_CONFIG: samplerate = %d, channels = %d\n",
__MM_FILE__, __func__, config.sample_rate,
config.channel_count);
break;
}
case AUDIO_SET_EQ: {
struct msm_audio_eq_stream_config eq_config;
pr_debug("[%s:%s] SET_EQ\n", __MM_FILE__, __func__);
if (copy_from_user(&eq_config, (void *) arg,
sizeof(eq_config))) {
rc = -EFAULT;
break;
}
rc = q6audio_set_stream_eq_pcm(pcm->ac, (void *) &eq_config);
break;
}
default:
rc = -EINVAL;
}
mutex_unlock(&pcm->lock);
pr_debug("[%s:%s] rc = %d\n", __MM_FILE__, __func__, rc);
return rc;
}
static int pcm_open(struct inode *inode, struct file *file)
{
struct pcm *pcm;
pr_info("[%s:%s] open\n", __MM_FILE__, __func__);
pcm = kzalloc(sizeof(struct pcm), GFP_KERNEL);
if (!pcm)
return -ENOMEM;
mutex_init(&pcm->lock);
pcm->channel_count = 2;
pcm->sample_rate = 44100;
pcm->buffer_size = BUFSZ;
file->private_data = pcm;
return 0;
}
static ssize_t pcm_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct pcm *pcm = file->private_data;
struct audio_client *ac;
struct audio_buffer *ab;
const char __user *start = buf;
int xfer;
pr_debug("[%s:%s] count = %d\n", __MM_FILE__, __func__, count);
if (!pcm->ac)
pcm_ioctl(file, AUDIO_START, 0);
ac = pcm->ac;
if (!ac)
return -ENODEV;
while (count > 0) {
ab = ac->buf + ac->cpu_buf;
if (ab->used)
if (!wait_event_timeout(ac->wait, (ab->used == 0), 5*HZ)) {
audio_client_dump(ac);
pr_err("[%s:%s] timeout. dsp dead?\n",
__MM_FILE__, __func__);
q6audio_dsp_not_responding();
}
pr_debug("[%s:%s] ab->data = %p, cpu_buf = %d", __MM_FILE__,
__func__, ab->data, ac->cpu_buf);
xfer = count;
if (xfer > ab->size)
xfer = ab->size;
if (copy_from_user(ab->data, buf, xfer))
return -EFAULT;
buf += xfer;
count -= xfer;
ab->used = 1;
ab->actual_size = xfer;
q6audio_write(ac, ab);
ac->cpu_buf ^= 1;
}
return buf - start;
}
static int pcm_release(struct inode *inode, struct file *file)
{
struct pcm *pcm = file->private_data;
if (pcm->ac)
q6audio_close(pcm->ac);
kfree(pcm);
pr_info("[%s:%s] release\n", __MM_FILE__, __func__);
return 0;
}
static struct file_operations pcm_fops = {
.owner = THIS_MODULE,
.open = pcm_open,
.write = pcm_write,
.release = pcm_release,
.unlocked_ioctl = pcm_ioctl,
};
struct miscdevice pcm_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_pcm_out",
.fops = &pcm_fops,
};
static int __init pcm_init(void) {
return misc_register(&pcm_misc);
}
device_initcall(pcm_init);