127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
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/* Copyright (c) 2010, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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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/slab.h>
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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/mutex.h>
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#include <linux/sched.h>
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#include <linux/wait.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_audio.h>
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#include <mach/debug_mm.h>
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struct dtmf {
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struct mutex lock;
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struct audio_client *ac;
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struct msm_dtmf_config cfg;
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};
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static long dtmf_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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struct dtmf *dtmf = file->private_data;
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int rc = 0;
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mutex_lock(&dtmf->lock);
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switch (cmd) {
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case AUDIO_START: {
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pr_debug("[%s:%s] AUDIO_START\n", __MM_FILE__, __func__);
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if (dtmf->ac) {
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pr_err("[%s:%s] active session already existing\n",
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__MM_FILE__, __func__);
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rc = -EBUSY;
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} else {
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dtmf->ac = q6audio_open_dtmf(48000, 2, 0);
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if (!dtmf->ac)
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rc = -ENOMEM;
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}
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break;
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}
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case AUDIO_PLAY_DTMF: {
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rc = copy_from_user((void *)&dtmf->cfg, (void *)arg,
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sizeof(struct msm_dtmf_config));
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pr_debug("[%s:%s] PLAY_DTMF: high = %d, low = %d\n",
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__MM_FILE__, __func__, dtmf->cfg.dtmf_hi,
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dtmf->cfg.dtmf_low);
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rc = q6audio_play_dtmf(dtmf->ac, dtmf->cfg.dtmf_hi,
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dtmf->cfg.dtmf_low, dtmf->cfg.duration,
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dtmf->cfg.rx_gain);
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if (rc) {
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pr_err("[%s:%s] DTMF_START failed\n", __MM_FILE__,
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__func__);
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break;
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}
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break;
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}
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default:
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rc = -EINVAL;
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}
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mutex_unlock(&dtmf->lock);
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pr_debug("[%s:%s] rc = %d\n", __MM_FILE__, __func__, rc) ;
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return rc;
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}
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static int dtmf_open(struct inode *inode, struct file *file)
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{
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int rc = 0;
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struct dtmf *dtmf;
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pr_info("[%s:%s] open\n", __MM_FILE__, __func__);
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dtmf = kzalloc(sizeof(struct dtmf), GFP_KERNEL);
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if (!dtmf)
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return -ENOMEM;
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mutex_init(&dtmf->lock);
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file->private_data = dtmf;
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return rc;
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}
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static int dtmf_release(struct inode *inode, struct file *file)
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{
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struct dtmf *dtmf = file->private_data;
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if (dtmf->ac)
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q6audio_close(dtmf->ac);
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kfree(dtmf);
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pr_info("[%s:%s] release\n", __MM_FILE__, __func__);
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return 0;
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}
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static const struct file_operations dtmf_fops = {
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.owner = THIS_MODULE,
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.open = dtmf_open,
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.release = dtmf_release,
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.unlocked_ioctl = dtmf_ioctl,
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};
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struct miscdevice dtmf_misc = {
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.minor = MISC_DYNAMIC_MINOR,
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.name = "msm_dtmf",
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.fops = &dtmf_fops,
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};
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static int __init dtmf_init(void)
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{
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return misc_register(&dtmf_misc);
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}
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device_initcall(dtmf_init);
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