173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/* Copyright (c) 2011, 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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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <mach/qdsp6v2/audio_dev_ctl.h>
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#include <sound/q6afe.h>
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#include <linux/slab.h>
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#include "snddev_virtual.h"
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static DEFINE_MUTEX(snddev_virtual_lock);
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static int snddev_virtual_open(struct msm_snddev_info *dev_info)
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{
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int rc = 0;
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pr_debug("%s\n", __func__);
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mutex_lock(&snddev_virtual_lock);
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if (!dev_info) {
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pr_err("%s: NULL dev_info\n", __func__);
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rc = -EINVAL;
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goto done;
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}
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if (!dev_info->opened) {
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rc = afe_start_pseudo_port(dev_info->copp_id);
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} else {
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pr_err("%s: Pseudo port 0x%x is already open\n",
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__func__, dev_info->copp_id);
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rc = -EBUSY;
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}
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done:
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mutex_unlock(&snddev_virtual_lock);
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return rc;
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}
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static int snddev_virtual_close(struct msm_snddev_info *dev_info)
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{
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int rc = 0;
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pr_debug("%s\n", __func__);
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mutex_lock(&snddev_virtual_lock);
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if (!dev_info) {
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pr_err("%s: NULL dev_info\n", __func__);
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rc = -EINVAL;
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goto done;
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}
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if (dev_info->opened) {
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rc = afe_stop_pseudo_port(dev_info->copp_id);
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} else {
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pr_err("%s: Pseudo port 0x%x is not open\n",
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__func__, dev_info->copp_id);
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rc = -EPERM;
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}
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done:
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mutex_unlock(&snddev_virtual_lock);
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return rc;
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}
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static int snddev_virtual_set_freq(struct msm_snddev_info *dev_info, u32 rate)
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{
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int rc = 0;
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if (!dev_info)
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rc = -EINVAL;
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return rate;
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}
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static int snddev_virtual_probe(struct platform_device *pdev)
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{
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int rc = 0;
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struct snddev_virtual_data *pdata;
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struct msm_snddev_info *dev_info;
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pr_debug("%s\n", __func__);
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if (!pdev || !pdev->dev.platform_data) {
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pr_err("%s: Invalid caller\n", __func__);
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rc = -EPERM;
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goto done;
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}
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pdata = pdev->dev.platform_data;
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dev_info = kmalloc(sizeof(struct msm_snddev_info), GFP_KERNEL);
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if (!dev_info) {
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pr_err("%s: Out of memory\n", __func__);
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rc = -ENOMEM;
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goto done;
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}
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dev_info->name = pdata->name;
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dev_info->copp_id = pdata->copp_id;
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dev_info->private_data = (void *) NULL;
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dev_info->dev_ops.open = snddev_virtual_open;
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dev_info->dev_ops.close = snddev_virtual_close;
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dev_info->dev_ops.set_freq = snddev_virtual_set_freq;
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dev_info->capability = pdata->capability;
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dev_info->sample_rate = 48000;
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dev_info->opened = 0;
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dev_info->sessions = 0;
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msm_snddev_register(dev_info);
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done:
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return rc;
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}
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static int snddev_virtual_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver snddev_virtual_driver = {
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.probe = snddev_virtual_probe,
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.remove = snddev_virtual_remove,
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.driver = { .name = "snddev_virtual" }
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};
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static int __init snddev_virtual_init(void)
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{
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int rc = 0;
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pr_debug("%s\n", __func__);
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rc = platform_driver_register(&snddev_virtual_driver);
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if (IS_ERR_VALUE(rc)) {
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pr_err("%s: Platform driver register failure\n", __func__);
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return -ENODEV;
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}
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return 0;
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}
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static void __exit snddev_virtual_exit(void)
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{
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platform_driver_unregister(&snddev_virtual_driver);
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return;
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}
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module_init(snddev_virtual_init);
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module_exit(snddev_virtual_exit);
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MODULE_DESCRIPTION("Virtual Sound Device driver");
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MODULE_LICENSE("GPL v2");
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