M7350/kernel/arch/arm/mach-msm/qdsp6/audiov2/pcm_in.c
2024-09-09 08:52:07 +00:00

209 lines
4.5 KiB
C

/* arch/arm/mach-msm/qdsp6/audiov2/pcm_in.c
*
* Copyright (C) 2009 Google, Inc.
* Copyright (C) 2009 HTC Corporation
* Copyright (c) 2009, 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/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_audiov2.h>
#include "dal_audio.h"
#include "dal_audio_format.h"
#define BUFSZ (4096)
#define DMASZ (BUFSZ * 2)
struct pcm {
struct mutex lock;
struct msm_audio_config cfg;
struct audio_client *audio_client;
};
static long q6_in_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct pcm *pcm = file->private_data;
struct adsp_open_command rpc;
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_START:
tx_clk_freq = pcm->cfg.sample_rate;
memset(&rpc, 0, sizeof(rpc));
rpc.format_block.standard.format = ADSP_AUDIO_FORMAT_PCM;
rpc.format_block.standard.channels = pcm->cfg.channel_count;
rpc.format_block.standard.bits_per_sample = 16;
rpc.format_block.standard.sampling_rate = pcm->cfg.sample_rate;
rpc.format_block.standard.is_signed = 1;
rpc.format_block.standard.is_interleaved = 1;
rpc.hdr.opcode = ADSP_AUDIO_IOCTL_CMD_OPEN_READ;
rpc.device = ADSP_AUDIO_DEVICE_ID_DEFAULT;
rpc.stream_context = ADSP_AUDIO_DEVICE_CONTEXT_RECORD;
rpc.buf_max_size = BUFSZ;
q6audio_start(pcm->audio_client, &rpc, sizeof(rpc));
break;
case AUDIO_STOP:
break;
case AUDIO_FLUSH:
break;
case AUDIO_SET_VOLUME:
break;
case AUDIO_SET_CONFIG:
if (copy_from_user(&pcm->cfg, (void *) arg,
sizeof(struct msm_audio_config))) {
rc = -EFAULT;
break;
}
break;
case AUDIO_GET_CONFIG:
if (copy_to_user((void *) arg, &pcm->cfg,
sizeof(struct msm_audio_config))) {
rc = -EFAULT;
}
break;
default:
rc = -EINVAL;
}
mutex_unlock(&pcm->lock);
return rc;
}
static int q6_in_open(struct inode *inode, struct file *file)
{
struct pcm *pcm;
pcm = kmalloc(sizeof(struct pcm), GFP_KERNEL);
if (pcm == NULL) {
pr_err("Could not allocate memory for pcm driver\n");
return -ENOMEM;
}
mutex_init(&pcm->lock);
file->private_data = pcm;
pcm->audio_client = q6audio_open(AUDIO_FLAG_READ, BUFSZ);
if (!pcm->audio_client) {
kfree(pcm);
return -ENOMEM;
}
pcm->cfg.channel_count = 1;
pcm->cfg.buffer_count = 2;
pcm->cfg.buffer_size = BUFSZ;
pcm->cfg.unused[0] = 0;
pcm->cfg.unused[1] = 0;
pcm->cfg.unused[2] = 0;
pcm->cfg.sample_rate = 8000;
return 0;
}
static ssize_t q6_in_read(struct file *file, char __user *buf,
size_t count, loff_t *pos)
{
struct audio_client *ac;
struct audio_buffer *ab;
const char __user *start = buf;
struct pcm *pcm = file->private_data;
int xfer;
int res;
mutex_lock(&pcm->lock);
ac = pcm->audio_client;
if (!ac) {
res = -ENODEV;
goto fail;
}
while (count > 0) {
ab = ac->buf + ac->cpu_buf;
if (ab->used)
wait_event(ac->wait, (ab->used == 0));
xfer = count;
if (xfer > ab->size)
xfer = ab->size;
if (copy_to_user(buf, ab->data, xfer)) {
res = -EFAULT;
goto fail;
}
buf += xfer;
count -= xfer;
ab->used = 1;
q6audio_read(ac, ab);
ac->cpu_buf ^= 1;
}
fail:
res = buf - start;
mutex_unlock(&pcm->lock);
return res;
}
static int q6_in_release(struct inode *inode, struct file *file)
{
int rc = 0;
struct pcm *pcm = file->private_data;
mutex_lock(&pcm->lock);
if (pcm->audio_client)
rc = q6audio_close(pcm->audio_client);
mutex_unlock(&pcm->lock);
kfree(pcm);
return rc;
}
static const struct file_operations q6_in_fops = {
.owner = THIS_MODULE,
.open = q6_in_open,
.read = q6_in_read,
.release = q6_in_release,
.unlocked_ioctl = q6_in_ioctl,
};
struct miscdevice q6_in_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_pcm_in",
.fops = &q6_in_fops,
};
static int __init q6_in_init(void)
{
return misc_register(&q6_in_misc);
}
device_initcall(q6_in_init);