141 lines
2.8 KiB
C
141 lines
2.8 KiB
C
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/* arch/arm/mach-msm/qdsp6/audiov2/audio_ctrl.c
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*
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* Copyright (C) 2009 Google, Inc.
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* Copyright (C) 2009 HTC Corporation
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* Copyright (c) 2009, The Linux Foundation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/miscdevice.h>
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#include <linux/uaccess.h>
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#include <linux/msm_audio.h>
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#include <mach/msm_qdsp6_audiov2.h>
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#define BUFSZ (0)
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static DEFINE_MUTEX(voice_lock);
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static int voice_started;
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static struct audio_client *voc_clnt;
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static int q6_voice_start(void)
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{
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int rc = 0;
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mutex_lock(&voice_lock);
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if (voice_started) {
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pr_err("voice: busy\n");
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rc = -EBUSY;
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goto done;
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}
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voc_clnt = q6voice_open();
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if (!voc_clnt) {
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pr_err("voice: open voice failed.\n");
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rc = -ENOMEM;
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goto done;
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}
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voice_started = 1;
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done:
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mutex_unlock(&voice_lock);
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return rc;
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}
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static int q6_voice_stop(void)
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{
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mutex_lock(&voice_lock);
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if (voice_started) {
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q6voice_close(voc_clnt);
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voice_started = 0;
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}
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mutex_unlock(&voice_lock);
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return 0;
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}
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static int q6_open(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static int q6_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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int rc;
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uint32_t n;
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uint32_t id[2];
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switch (cmd) {
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case AUDIO_SWITCH_DEVICE:
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rc = copy_from_user(&n, (void *)arg, sizeof(n));
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if (!rc)
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rc = q6audio_do_routing(n);
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break;
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case AUDIO_SET_VOLUME:
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rc = copy_from_user(&n, (void *)arg, sizeof(n));
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if (!rc)
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rc = q6audio_set_rx_volume(n);
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break;
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case AUDIO_SET_MUTE:
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rc = copy_from_user(&n, (void *)arg, sizeof(n));
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if (!rc)
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rc = q6audio_set_tx_mute(n);
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break;
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case AUDIO_UPDATE_ACDB:
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rc = copy_from_user(&id, (void *)arg, sizeof(id));
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if (!rc)
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rc = q6audio_update_acdb(id[0], id[1]);
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break;
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case AUDIO_START_VOICE:
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rc = q6_voice_start();
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break;
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case AUDIO_STOP_VOICE:
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rc = q6_voice_stop();
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break;
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default:
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rc = -EINVAL;
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}
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return rc;
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}
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static int q6_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static const struct file_operations q6_dev_fops = {
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.owner = THIS_MODULE,
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.open = q6_open,
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.ioctl = q6_ioctl,
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.release = q6_release,
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};
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struct miscdevice q6_control_device = {
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.minor = MISC_DYNAMIC_MINOR,
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.name = "msm_audio_ctl",
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.fops = &q6_dev_fops,
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};
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static int __init q6_audio_ctl_init(void)
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{
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return misc_register(&q6_control_device);
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}
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device_initcall(q6_audio_ctl_init);
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