M7350/kernel/arch/arm/mach-msm/qdsp6/auxpcm_lb_out.c
2024-09-09 08:52:07 +00:00

192 lines
4.9 KiB
C

/* arch/arm/mach-msm/qdsp6/auxpcm_lb_out.c
*
* Copyright (C) 2009 Google, Inc.
* Author: Brian Swetland <swetland@google.com>
* Copyright (c) 2010, The Linux Foundation. All rights reserved.
* 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>
struct auxpcm {
struct mutex lock;
struct audio_client *ac;
uint32_t sample_rate;
uint32_t channel_count;
int opened;;
};
static long auxpcmout_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct auxpcm *auxpcmout = file->private_data;
int rc = 0;
mutex_lock(&auxpcmout->lock);
switch (cmd) {
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 (auxpcmout->ac) {
rc = -EBUSY;
pr_err("[%s:%s] active session already existing\n",
__MM_FILE__, __func__);
} else {
auxpcmout->ac =
q6audio_open_auxpcm(auxpcmout->sample_rate,
auxpcmout->channel_count,
AUDIO_FLAG_WRITE, acdb_id);
if (!auxpcmout->ac) {
pr_err("[%s:%s] auxpcm 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 (auxpcmout->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) {
rc = -EINVAL;
pr_err("[%s:%s] invalid channelcount %d\n",
__MM_FILE__, __func__, config.channel_count);
break;
}
if (config.sample_rate != 8000) {
rc = -EINVAL;
pr_err("[%s:%s] invalid samplerate %d\n", __MM_FILE__,
__func__, config.sample_rate);
break;
}
auxpcmout->sample_rate = config.sample_rate;
auxpcmout->channel_count = config.channel_count;
break;
}
case AUDIO_GET_CONFIG: {
struct msm_audio_config config;
config.buffer_size = 0;
config.buffer_count = 0;
config.sample_rate = auxpcmout->sample_rate;
config.channel_count = auxpcmout->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;
}
default:
rc = -EINVAL;
}
mutex_unlock(&auxpcmout->lock);
pr_debug("[%s:%s] rc = %d\n", __MM_FILE__, __func__, rc);
return rc;
}
static struct auxpcm the_auxpcmout;
static int auxpcmout_open(struct inode *inode, struct file *file)
{
struct auxpcm *auxpcmout = &the_auxpcmout;
pr_info("[%s:%s] open\n", __MM_FILE__, __func__);
mutex_lock(&auxpcmout->lock);
if (auxpcmout->opened) {
pr_err("aux pcm loopback rx already open!\n");
mutex_unlock(&auxpcmout->lock);
return -EBUSY;
}
auxpcmout->channel_count = 1;
auxpcmout->sample_rate = 8000;
auxpcmout->opened = 1;
file->private_data = auxpcmout;
mutex_unlock(&auxpcmout->lock);
return 0;
}
static int auxpcmout_release(struct inode *inode, struct file *file)
{
struct auxpcm *auxpcmout = file->private_data;
mutex_lock(&auxpcmout->lock);
if (auxpcmout->ac)
q6audio_auxpcm_close(auxpcmout->ac);
auxpcmout->ac = NULL;
auxpcmout->opened = 0;
mutex_unlock(&auxpcmout->lock);
pr_info("[%s:%s] release\n", __MM_FILE__, __func__);
return 0;
}
static const struct file_operations auxpcmout_fops = {
.owner = THIS_MODULE,
.open = auxpcmout_open,
.release = auxpcmout_release,
.unlocked_ioctl = auxpcmout_ioctl,
};
struct miscdevice auxpcmout_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_aux_pcm_lb_out",
.fops = &auxpcmout_fops,
};
static int __init auxpcmout_init(void)
{
mutex_init(&the_auxpcmout.lock);
return misc_register(&auxpcmout_misc);
}
device_initcall(auxpcmout_init);