2011-06-02 20:44:46 +00:00
|
|
|
/*
|
|
|
|
* omap4-hdmi-card.c
|
|
|
|
*
|
|
|
|
* OMAP ALSA SoC machine driver for TI OMAP4 HDMI
|
|
|
|
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
|
|
|
|
* Author: Ricardo Neri <ricardo.neri@ti.com>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* version 2 as published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
|
|
* 02110-1301 USA
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2011-07-15 16:38:28 +00:00
|
|
|
#include <linux/module.h>
|
2011-06-02 20:44:46 +00:00
|
|
|
#include <sound/pcm.h>
|
|
|
|
#include <sound/soc.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
|
|
#include <video/omapdss.h>
|
|
|
|
|
|
|
|
#define DRV_NAME "omap4-hdmi-audio"
|
|
|
|
|
|
|
|
static int omap4_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
|
|
|
|
struct snd_pcm_hw_params *params)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct omap_overlay_manager *mgr = NULL;
|
|
|
|
struct device *dev = substream->pcm->card->dev;
|
|
|
|
|
|
|
|
/* Find DSS HDMI device */
|
|
|
|
for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
|
|
|
|
mgr = omap_dss_get_overlay_manager(i);
|
|
|
|
if (mgr && mgr->device
|
|
|
|
&& mgr->device->type == OMAP_DISPLAY_TYPE_HDMI)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i == omap_dss_get_num_overlay_managers()) {
|
|
|
|
dev_err(dev, "HDMI display device not found!\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Make sure HDMI is power-on to avoid L3 interconnect errors */
|
|
|
|
if (mgr->device->state != OMAP_DSS_DISPLAY_ACTIVE) {
|
|
|
|
dev_err(dev, "HDMI display is not active!\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct snd_soc_ops omap4_hdmi_dai_ops = {
|
|
|
|
.hw_params = omap4_hdmi_dai_hw_params,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct snd_soc_dai_link omap4_hdmi_dai = {
|
|
|
|
.name = "HDMI",
|
|
|
|
.stream_name = "HDMI",
|
|
|
|
.cpu_dai_name = "hdmi-audio-dai",
|
|
|
|
.platform_name = "omap-pcm-audio",
|
|
|
|
.codec_name = "omapdss_hdmi",
|
|
|
|
.codec_dai_name = "hdmi-audio-codec",
|
|
|
|
.ops = &omap4_hdmi_dai_ops,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct snd_soc_card snd_soc_omap4_hdmi = {
|
|
|
|
.name = "OMAP4HDMI",
|
|
|
|
.dai_link = &omap4_hdmi_dai,
|
|
|
|
.num_links = 1,
|
|
|
|
};
|
|
|
|
|
|
|
|
static __devinit int omap4_hdmi_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct snd_soc_card *card = &snd_soc_omap4_hdmi;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
card->dev = &pdev->dev;
|
|
|
|
|
|
|
|
ret = snd_soc_register_card(card);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
|
|
|
|
card->dev = NULL;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devexit omap4_hdmi_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct snd_soc_card *card = platform_get_drvdata(pdev);
|
|
|
|
|
|
|
|
snd_soc_unregister_card(card);
|
|
|
|
card->dev = NULL;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver omap4_hdmi_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "omap4-hdmi-audio",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
},
|
|
|
|
.probe = omap4_hdmi_probe,
|
|
|
|
.remove = __devexit_p(omap4_hdmi_remove),
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init omap4_hdmi_init(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&omap4_hdmi_driver);
|
|
|
|
}
|
|
|
|
module_init(omap4_hdmi_init);
|
|
|
|
|
|
|
|
static void __exit omap4_hdmi_exit(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&omap4_hdmi_driver);
|
|
|
|
}
|
|
|
|
module_exit(omap4_hdmi_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
|
|
|
|
MODULE_DESCRIPTION("OMAP4 HDMI machine ASoC driver");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|