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/* evrc audio output device
*
* Copyright (C) 2008 Google, Inc.
* Copyright (C) 2008 HTC Corporation
* Copyright (c) 2011-2016, 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 "audio_utils_aio.h"
static struct miscdevice audio_evrc_misc;
static struct ws_mgr audio_evrc_ws_mgr;
#ifdef CONFIG_DEBUG_FS
static const struct file_operations audio_evrc_debug_fops = {
.read = audio_aio_debug_read,
.open = audio_aio_debug_open,
};
#endif
static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct q6audio_aio *audio = file->private_data;
int rc = 0;
switch (cmd) {
case AUDIO_START: {
pr_debug("%s[%pK]: AUDIO_START session_id[%d]\n", __func__,
audio, audio->ac->session);
if (audio->feedback == NON_TUNNEL_MODE) {
/* Configure PCM output block */
rc = q6asm_enc_cfg_blk_pcm(audio->ac,
audio->pcm_cfg.sample_rate,
audio->pcm_cfg.channel_count);
if (rc < 0) {
pr_err("pcm output block config failed\n");
break;
}
}
rc = audio_aio_enable(audio);
audio->eos_rsp = 0;
audio->eos_flag = 0;
if (!rc) {
audio->enabled = 1;
} else {
audio->enabled = 0;
pr_err("Audio Start procedure failed rc=%d\n", rc);
break;
}
pr_debug("%s: AUDIO_START sessionid[%d]enable[%d]\n", __func__,
audio->ac->session,
audio->enabled);
if (audio->stopped == 1)
audio->stopped = 0;
break;
}
default:
pr_debug("%s[%pK]: Calling utils ioctl\n", __func__, audio);
rc = audio->codec_ioctl(file, cmd, arg);
}
return rc;
}
static int audio_open(struct inode *inode, struct file *file)
{
struct q6audio_aio *audio = NULL;
int rc = 0;
#ifdef CONFIG_DEBUG_FS
/* 4 bytes represents decoder number, 1 byte for terminate string */
char name[sizeof "msm_evrc_" + 5];
#endif
audio = kzalloc(sizeof(struct q6audio_aio), GFP_KERNEL);
if (audio == NULL) {
pr_err("Could not allocate memory for aac decode driver\n");
return -ENOMEM;
}
/* Settings will be re-config at AUDIO_SET_CONFIG,
* but at least we need to have initial config
*/
audio->pcm_cfg.buffer_size = PCM_BUFSZ_MIN;
audio->miscdevice = &audio_evrc_misc;
audio->wakelock_voted = false;
audio->audio_ws_mgr = &audio_evrc_ws_mgr;
audio->ac = q6asm_audio_client_alloc((app_cb) q6_audio_cb,
(void *)audio);
if (!audio->ac) {
pr_err("Could not allocate memory for audio client\n");
kfree(audio);
return -ENOMEM;
}
rc = audio_aio_open(audio, file);
if (rc < 0) {
pr_err("%s: audio_aio_open rc=%d\n",
__func__, rc);
goto fail;
}
/* open in T/NT mode */
if ((file->f_mode & FMODE_WRITE) && (file->f_mode & FMODE_READ)) {
rc = q6asm_open_read_write(audio->ac, FORMAT_LINEAR_PCM,
FORMAT_EVRC);
if (rc < 0) {
pr_err("NT mode Open failed rc=%d\n", rc);
rc = -ENODEV;
goto fail;
}
audio->feedback = NON_TUNNEL_MODE;
audio->buf_cfg.frames_per_buf = 0x01;
audio->buf_cfg.meta_info_enable = 0x01;
} else if ((file->f_mode & FMODE_WRITE) &&
!(file->f_mode & FMODE_READ)) {
rc = q6asm_open_write(audio->ac, FORMAT_EVRC);
if (rc < 0) {
pr_err("T mode Open failed rc=%d\n", rc);
rc = -ENODEV;
goto fail;
}
audio->feedback = TUNNEL_MODE;
audio->buf_cfg.meta_info_enable = 0x00;
} else {
pr_err("Not supported mode\n");
rc = -EACCES;
goto fail;
}
#ifdef CONFIG_DEBUG_FS
snprintf(name, sizeof name, "msm_evrc_%04x", audio->ac->session);
audio->dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
NULL, (void *)audio,
&audio_evrc_debug_fops);
if (IS_ERR(audio->dentry))
pr_debug("debugfs_create_file failed\n");
#endif
pr_info("%s:dec success mode[%d]session[%d]\n", __func__,
audio->feedback,
audio->ac->session);
return rc;
fail:
q6asm_audio_client_free(audio->ac);
kfree(audio);
return rc;
}
static const struct file_operations audio_evrc_fops = {
.owner = THIS_MODULE,
.open = audio_open,
.release = audio_aio_release,
.unlocked_ioctl = audio_ioctl,
.fsync = audio_aio_fsync,
};
static struct miscdevice audio_evrc_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_evrc",
.fops = &audio_evrc_fops,
};
static int __init audio_evrc_init(void)
{
int ret = misc_register(&audio_evrc_misc);
if (ret == 0)
device_init_wakeup(audio_evrc_misc.this_device, true);
audio_evrc_ws_mgr.ref_cnt = 0;
mutex_init(&audio_evrc_ws_mgr.ws_lock);
return ret;
}
device_initcall(audio_evrc_init);
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