[deliverable/linux.git] / sound / soc / omap / omap-hdmi.c

/*
 * omap-hdmi.c
 *
 * OMAP ALSA SoC DAI driver for HDMI audio on OMAP4 processors.
 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
 * Authors: Jorge Candelaria <jorge.candelaria@ti.com>
 *          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
 *
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/asound.h>
#include <sound/asoundef.h>
#include <sound/dmaengine_pcm.h>
#include <video/omapdss.h>
#include <sound/omap-pcm.h>

#include "omap-hdmi.h"

#define DRV_NAME "omap-hdmi-audio-dai"

struct hdmi_priv {
	struct snd_dmaengine_dai_dma_data dma_data;
	unsigned int dma_req;
	struct omap_dss_audio dss_audio;
	struct snd_aes_iec958 iec;
	struct snd_cea_861_aud_if cea;
	struct omap_dss_device *dssdev;
};

static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
				  struct snd_soc_dai *dai)
{
	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	int err;
	/*
	 * Make sure that the period bytes are multiple of the DMA packet size.
	 * Largest packet size we use is 32 32-bit words = 128 bytes
	 */
	err = snd_pcm_hw_constraint_step(substream->runtime, 0,
				 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
	if (err < 0) {
		dev_err(dai->dev, "could not apply constraint\n");
		return err;
	}

	if (!priv->dssdev->driver->audio_supported(priv->dssdev)) {
		dev_err(dai->dev, "audio not supported\n");
		return -ENODEV;
	}

	snd_soc_dai_set_dma_data(dai, substream, &priv->dma_data);

	return 0;
}

static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);

	return priv->dssdev->driver->audio_enable(priv->dssdev);
}

static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
				    struct snd_pcm_hw_params *params,
				    struct snd_soc_dai *dai)
{
	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	struct snd_aes_iec958 *iec = &priv->iec;
	struct snd_cea_861_aud_if *cea = &priv->cea;
	int err = 0;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		priv->dma_data.maxburst = 16;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		priv->dma_data.maxburst = 32;
		break;
	default:
		dev_err(dai->dev, "format not supported!\n");
		return -EINVAL;
	}

	/*
	 * fill the IEC-60958 channel status word
	 */
	/* initialize the word bytes */
	memset(iec->status, 0, sizeof(iec->status));

	/* specify IEC-60958-3 (commercial use) */
	iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;

	/* specify that the audio is LPCM*/
	iec->status[0] &= ~IEC958_AES0_NONAUDIO;

	iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;

	iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE;

	iec->status[0] |= IEC958_AES1_PRO_MODE_NOTID;

	iec->status[1] = IEC958_AES1_CON_GENERAL;

	iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC;

	iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC;

	switch (params_rate(params)) {
	case 32000:
		iec->status[3] |= IEC958_AES3_CON_FS_32000;
		break;
	case 44100:
		iec->status[3] |= IEC958_AES3_CON_FS_44100;
		break;
	case 48000:
		iec->status[3] |= IEC958_AES3_CON_FS_48000;
		break;
	case 88200:
		iec->status[3] |= IEC958_AES3_CON_FS_88200;
		break;
	case 96000:
		iec->status[3] |= IEC958_AES3_CON_FS_96000;
		break;
	case 176400:
		iec->status[3] |= IEC958_AES3_CON_FS_176400;
		break;
	case 192000:
		iec->status[3] |= IEC958_AES3_CON_FS_192000;
		break;
	default:
		dev_err(dai->dev, "rate not supported!\n");
		return -EINVAL;
	}

	/* specify the clock accuracy */
	iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM;

	/*
	 * specify the word length. The same word length value can mean
	 * two different lengths. Hence, we need to specify the maximum
	 * word length as well.
	 */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16;
		iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20;
		iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24;
		break;
	default:
		dev_err(dai->dev, "format not supported!\n");
		return -EINVAL;
	}

	/*
	 * Fill the CEA-861 audio infoframe (see spec for details)
	 */

	cea->db1_ct_cc = (params_channels(params) - 1)
		& CEA861_AUDIO_INFOFRAME_DB1CC;
	cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;

	cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
	cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;

	cea->db3 = 0; /* not used, all zeros */

	/*
	 * The OMAP HDMI IP requires to use the 8-channel channel code when
	 * transmitting more than two channels.
	 */
	if (params_channels(params) == 2)
		cea->db4_ca = 0x0;
	else
		cea->db4_ca = 0x13;

	cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
	/* the expression is trivial but makes clear what we are doing */
	cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);

	priv->dss_audio.iec = iec;
	priv->dss_audio.cea = cea;

	err = priv->dssdev->driver->audio_config(priv->dssdev,
						 &priv->dss_audio);

	return err;
}

static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
				struct snd_soc_dai *dai)
{
	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	int err = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		err = priv->dssdev->driver->audio_start(priv->dssdev);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		priv->dssdev->driver->audio_stop(priv->dssdev);
		break;
	default:
		err = -EINVAL;
	}
	return err;
}

static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);

	priv->dssdev->driver->audio_disable(priv->dssdev);
}

static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
	.startup	= omap_hdmi_dai_startup,
	.hw_params	= omap_hdmi_dai_hw_params,
	.prepare	= omap_hdmi_dai_prepare,
	.trigger	= omap_hdmi_dai_trigger,
	.shutdown	= omap_hdmi_dai_shutdown,
};

static struct snd_soc_dai_driver omap_hdmi_dai = {
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = OMAP_HDMI_RATES,
		.formats = OMAP_HDMI_FORMATS,
	},
	.ops = &omap_hdmi_dai_ops,
};

static const struct snd_soc_component_driver omap_hdmi_component = {
	.name		= DRV_NAME,
};

static int omap_hdmi_probe(struct platform_device *pdev)
{
	int ret;
	struct resource *hdmi_rsrc;
	struct hdmi_priv *hdmi_data;
	bool hdmi_dev_found = false;

	hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
	if (hdmi_data == NULL) {
		dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n");
		return -ENOMEM;
	}

	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!hdmi_rsrc) {
		dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n");
		return -ENODEV;
	}

	hdmi_data->dma_data.addr = hdmi_rsrc->start + OMAP_HDMI_AUDIO_DMA_PORT;

	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	if (!hdmi_rsrc) {
		dev_err(&pdev->dev, "Cannot obtain IORESOURCE_DMA HDMI\n");
		return -ENODEV;
	}

	hdmi_data->dma_req = hdmi_rsrc->start;
	hdmi_data->dma_data.filter_data = &hdmi_data->dma_req;
	hdmi_data->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;

	/*
	 * TODO: We assume that there is only one DSS HDMI device. Future
	 * OMAP implementations may support more than one HDMI devices and
	 * we should provided separate audio support for all of them.
	 */
	/* Find an HDMI device. */
	for_each_dss_dev(hdmi_data->dssdev) {
		omap_dss_get_device(hdmi_data->dssdev);

		if (!hdmi_data->dssdev->driver) {
			omap_dss_put_device(hdmi_data->dssdev);
			continue;
		}

		if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
			hdmi_dev_found = true;
			break;
		}
	}

	if (!hdmi_dev_found) {
		dev_err(&pdev->dev, "no driver for HDMI display found\n");
		return -ENODEV;
	}

	dev_set_drvdata(&pdev->dev, hdmi_data);
	ret = snd_soc_register_component(&pdev->dev, &omap_hdmi_component,
					 &omap_hdmi_dai, 1);

	if (ret)
		return ret;

	return omap_pcm_platform_register(&pdev->dev);
}

static int omap_hdmi_remove(struct platform_device *pdev)
{
	struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev);

	snd_soc_unregister_component(&pdev->dev);

	if (hdmi_data == NULL) {
		dev_err(&pdev->dev, "cannot obtain HDMi data\n");
		return -ENODEV;
	}

	omap_dss_put_device(hdmi_data->dssdev);
	return 0;
}

static struct platform_driver hdmi_dai_driver = {
	.driver = {
		.name = DRV_NAME,
		.owner = THIS_MODULE,
	},
	.probe = omap_hdmi_probe,
	.remove = omap_hdmi_remove,
};

module_platform_driver(hdmi_dai_driver);

MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>");
MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
MODULE_DESCRIPTION("OMAP HDMI SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
Commit	Line	Data
bca2e41d RN	1	/*
	2	* omap-hdmi.c
	3	*
	4	* OMAP ALSA SoC DAI driver for HDMI audio on OMAP4 processors.
	5	* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
	6	* Authors: Jorge Candelaria <jorge.candelaria@ti.com>
	7	* Ricardo Neri <ricardo.neri@ti.com>
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* version 2 as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	21	* 02110-1301 USA
	22	*
	23	*/
	24
	25	#include <linux/init.h>
	26	#include <linux/module.h>
	27	#include <linux/device.h>
	28	#include <sound/core.h>
	29	#include <sound/pcm.h>
	30	#include <sound/pcm_params.h>
	31	#include <sound/initval.h>
	32	#include <sound/soc.h>
7e6aa220 RN	33	#include <sound/asound.h>
7e6aa220 RN	34	#include <sound/asoundef.h>
09ae3aaf	35	#include <sound/dmaengine_pcm.h>
a48d9b75	36	#include <video/omapdss.h>
87c19364	37	#include <sound/omap-pcm.h>
bca2e41d	38
bca2e41d RN	39	#include "omap-hdmi.h"
bca2e41d RN	40
e412ec64	41	#define DRV_NAME "omap-hdmi-audio-dai"
bca2e41d	42
26039153	43	struct hdmi_priv {
09ae3aaf LPC	44	struct snd_dmaengine_dai_dma_data dma_data;
09ae3aaf LPC	45	unsigned int dma_req;
7e6aa220 RN	46	struct omap_dss_audio dss_audio;
	47	struct snd_aes_iec958 iec;
	48	struct snd_cea_861_aud_if cea;
a48d9b75	49	struct omap_dss_device *dssdev;
bca2e41d RN	50	};
	51
	52	static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
	53	struct snd_soc_dai *dai)
	54	{
a0534e3b	55	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
bca2e41d RN	56	int err;
	57	/*
	58	* Make sure that the period bytes are multiple of the DMA packet size.
	59	* Largest packet size we use is 32 32-bit words = 128 bytes
	60	*/
	61	err = snd_pcm_hw_constraint_step(substream->runtime, 0,
	62	SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
a0534e3b RN	63	if (err < 0) {
a0534e3b RN	64	dev_err(dai->dev, "could not apply constraint\n");
bca2e41d	65	return err;
a0534e3b	66	}
bca2e41d	67
a0534e3b RN	68	if (!priv->dssdev->driver->audio_supported(priv->dssdev)) {
	69	dev_err(dai->dev, "audio not supported\n");
	70	return -ENODEV;
	71	}
bcd6da7b	72
09ae3aaf	73	snd_soc_dai_set_dma_data(dai, substream, &priv->dma_data);
bcd6da7b	74
bca2e41d RN	75	return 0;
	76	}
	77
a48d9b75 RN	78	static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream,
	79	struct snd_soc_dai *dai)
	80	{
	81	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	82
	83	return priv->dssdev->driver->audio_enable(priv->dssdev);
	84	}
	85
bca2e41d RN	86	static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
	87	struct snd_pcm_hw_params *params,
	88	struct snd_soc_dai *dai)
	89	{
26039153	90	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
7e6aa220 RN	91	struct snd_aes_iec958 *iec = &priv->iec;
7e6aa220 RN	92	struct snd_cea_861_aud_if *cea = &priv->cea;
bca2e41d RN	93	int err = 0;
	94
	95	switch (params_format(params)) {
	96	case SNDRV_PCM_FORMAT_S16_LE:
09ae3aaf	97	priv->dma_data.maxburst = 16;
bca2e41d RN	98	break;
bca2e41d RN	99	case SNDRV_PCM_FORMAT_S24_LE:
09ae3aaf	100	priv->dma_data.maxburst = 32;
bca2e41d RN	101	break;
bca2e41d RN	102	default:
7e6aa220 RN	103	dev_err(dai->dev, "format not supported!\n");
7e6aa220 RN	104	return -EINVAL;
bca2e41d RN	105	}
bca2e41d RN	106
7e6aa220 RN	107	/*
	108	* fill the IEC-60958 channel status word
	109	*/
a88fedfd RN	110	/* initialize the word bytes */
a88fedfd RN	111	memset(iec->status, 0, sizeof(iec->status));
7e6aa220 RN	112
	113	/* specify IEC-60958-3 (commercial use) */
	114	iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
	115
	116	/* specify that the audio is LPCM*/
	117	iec->status[0] &= ~IEC958_AES0_NONAUDIO;
	118
	119	iec->status[0] \|= IEC958_AES0_CON_NOT_COPYRIGHT;
	120
	121	iec->status[0] \|= IEC958_AES0_CON_EMPHASIS_NONE;
	122
	123	iec->status[0] \|= IEC958_AES1_PRO_MODE_NOTID;
	124
	125	iec->status[1] = IEC958_AES1_CON_GENERAL;
	126
	127	iec->status[2] \|= IEC958_AES2_CON_SOURCE_UNSPEC;
	128
	129	iec->status[2] \|= IEC958_AES2_CON_CHANNEL_UNSPEC;
	130
	131	switch (params_rate(params)) {
	132	case 32000:
	133	iec->status[3] \|= IEC958_AES3_CON_FS_32000;
	134	break;
	135	case 44100:
	136	iec->status[3] \|= IEC958_AES3_CON_FS_44100;
	137	break;
	138	case 48000:
	139	iec->status[3] \|= IEC958_AES3_CON_FS_48000;
	140	break;
	141	case 88200:
	142	iec->status[3] \|= IEC958_AES3_CON_FS_88200;
	143	break;
	144	case 96000:
	145	iec->status[3] \|= IEC958_AES3_CON_FS_96000;
	146	break;
	147	case 176400:
	148	iec->status[3] \|= IEC958_AES3_CON_FS_176400;
	149	break;
	150	case 192000:
	151	iec->status[3] \|= IEC958_AES3_CON_FS_192000;
	152	break;
	153	default:
	154	dev_err(dai->dev, "rate not supported!\n");
	155	return -EINVAL;
	156	}
	157
	158	/* specify the clock accuracy */
	159	iec->status[3] \|= IEC958_AES3_CON_CLOCK_1000PPM;
	160
	161	/*
	162	* specify the word length. The same word length value can mean
	163	* two different lengths. Hence, we need to specify the maximum
	164	* word length as well.
	165	*/
	166	switch (params_format(params)) {
	167	case SNDRV_PCM_FORMAT_S16_LE:
	168	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_20_16;
	169	iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
	170	break;
	171	case SNDRV_PCM_FORMAT_S24_LE:
	172	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_24_20;
	173	iec->status[4] \|= IEC958_AES4_CON_MAX_WORDLEN_24;
	174	break;
	175	default:
176	dev_err(dai->dev, "format not supported!\n");
177	return -EINVAL;
178	}
179
180	/*
181	* Fill the CEA-861 audio infoframe (see spec for details)
182	*/
183
184	cea->db1_ct_cc = (params_channels(params) - 1)
185	& CEA861_AUDIO_INFOFRAME_DB1CC;
186	cea->db1_ct_cc \|= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
187
188	cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
189	cea->db2_sf_ss \|= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
190
191	cea->db3 = 0; /* not used, all zeros */
192
193	/*
194	* The OMAP HDMI IP requires to use the 8-channel channel code when
195	* transmitting more than two channels.
196	*/
197	if (params_channels(params) == 2)
198	cea->db4_ca = 0x0;
199	else
200	cea->db4_ca = 0x13;
201
202	cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
203	/* the expression is trivial but makes clear what we are doing */
204	cea->db5_dminh_lsv \|= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
205
206	priv->dss_audio.iec = iec;
207	priv->dss_audio.cea = cea;
208
209	err = priv->dssdev->driver->audio_config(priv->dssdev,
210	&priv->dss_audio);
211
bca2e41d RN	212	return err;
	213	}
	214
a48d9b75 RN	215	static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	216	struct snd_soc_dai *dai)
	217	{
	218	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	219	int err = 0;
	220
	221	switch (cmd) {
	222	case SNDRV_PCM_TRIGGER_START:
	223	case SNDRV_PCM_TRIGGER_RESUME:
	224	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	225	err = priv->dssdev->driver->audio_start(priv->dssdev);
	226	break;
	227	case SNDRV_PCM_TRIGGER_STOP:
	228	case SNDRV_PCM_TRIGGER_SUSPEND:
	229	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	230	priv->dssdev->driver->audio_stop(priv->dssdev);
	231	break;
	232	default:
	233	err = -EINVAL;
	234	}
	235	return err;
	236	}
	237
	238	static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
	239	struct snd_soc_dai *dai)
	240	{
	241	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	242
	243	priv->dssdev->driver->audio_disable(priv->dssdev);
	244	}
	245
85e7652d	246	static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
bca2e41d RN	247	.startup = omap_hdmi_dai_startup,
bca2e41d RN	248	.hw_params = omap_hdmi_dai_hw_params,
7e6aa220 RN	249	.prepare = omap_hdmi_dai_prepare,
	250	.trigger = omap_hdmi_dai_trigger,
	251	.shutdown = omap_hdmi_dai_shutdown,
bca2e41d RN	252	};
	253
	254	static struct snd_soc_dai_driver omap_hdmi_dai = {
	255	.playback = {
	256	.channels_min = 2,
a1ab92da	257	.channels_max = 8,
bca2e41d RN	258	.rates = OMAP_HDMI_RATES,
	259	.formats = OMAP_HDMI_FORMATS,
	260	},
	261	.ops = &omap_hdmi_dai_ops,
	262	};
	263
0ba7f849 KM	264	static const struct snd_soc_component_driver omap_hdmi_component = {
	265	.name = DRV_NAME,
	266	};
	267
7ff60006	268	static int omap_hdmi_probe(struct platform_device *pdev)
bca2e41d RN	269	{
	270	int ret;
	271	struct resource *hdmi_rsrc;
26039153	272	struct hdmi_priv *hdmi_data;
a48d9b75	273	bool hdmi_dev_found = false;
26039153 RN	274
	275	hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
	276	if (hdmi_data == NULL) {
	277	dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n");
	278	return -ENOMEM;
	279	}
bca2e41d RN	280
	281	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	282	if (!hdmi_rsrc) {
	283	dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n");
0ff5ee87	284	return -ENODEV;
bca2e41d RN	285	}
bca2e41d RN	286
09ae3aaf	287	hdmi_data->dma_data.addr = hdmi_rsrc->start + OMAP_HDMI_AUDIO_DMA_PORT;
bca2e41d RN	288
	289	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	290	if (!hdmi_rsrc) {
	291	dev_err(&pdev->dev, "Cannot obtain IORESOURCE_DMA HDMI\n");
0ff5ee87	292	return -ENODEV;
bca2e41d RN	293	}
bca2e41d RN	294
09ae3aaf LPC	295	hdmi_data->dma_req = hdmi_rsrc->start;
	296	hdmi_data->dma_data.filter_data = &hdmi_data->dma_req;
	297	hdmi_data->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
bca2e41d	298
a48d9b75 RN	299	/*
	300	* TODO: We assume that there is only one DSS HDMI device. Future
	301	* OMAP implementations may support more than one HDMI devices and
	302	* we should provided separate audio support for all of them.
	303	*/
	304	/* Find an HDMI device. */
	305	for_each_dss_dev(hdmi_data->dssdev) {
	306	omap_dss_get_device(hdmi_data->dssdev);
	307
	308	if (!hdmi_data->dssdev->driver) {
	309	omap_dss_put_device(hdmi_data->dssdev);
	310	continue;
	311	}
	312
	313	if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
	314	hdmi_dev_found = true;
	315	break;
	316	}
	317	}
	318
	319	if (!hdmi_dev_found) {
	320	dev_err(&pdev->dev, "no driver for HDMI display found\n");
	321	return -ENODEV;
	322	}
	323
26039153	324	dev_set_drvdata(&pdev->dev, hdmi_data);
0ba7f849 KM	325	ret = snd_soc_register_component(&pdev->dev, &omap_hdmi_component,
0ba7f849 KM	326	&omap_hdmi_dai, 1);
a48d9b75	327
9769824c PU	328	if (ret)
	329	return ret;
	330
	331	return omap_pcm_platform_register(&pdev->dev);
	332	}
bca2e41d	333
7ff60006	334	static int omap_hdmi_remove(struct platform_device *pdev)
bca2e41d	335	{
a48d9b75 RN	336	struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev);
a48d9b75 RN	337
0ba7f849	338	snd_soc_unregister_component(&pdev->dev);
a48d9b75 RN	339
	340	if (hdmi_data == NULL) {
	341	dev_err(&pdev->dev, "cannot obtain HDMi data\n");
	342	return -ENODEV;
	343	}
	344
	345	omap_dss_put_device(hdmi_data->dssdev);
bca2e41d RN	346	return 0;
	347	}
	348
	349	static struct platform_driver hdmi_dai_driver = {
	350	.driver = {
	351	.name = DRV_NAME,
	352	.owner = THIS_MODULE,
	353	},
	354	.probe = omap_hdmi_probe,
7ff60006	355	.remove = omap_hdmi_remove,
bca2e41d RN	356	};
bca2e41d RN	357
beda5bf5	358	module_platform_driver(hdmi_dai_driver);
bca2e41d RN	359
	360	MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>");
	361	MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
	362	MODULE_DESCRIPTION("OMAP HDMI SoC Interface");
	363	MODULE_LICENSE("GPL");
	364	MODULE_ALIAS("platform:" DRV_NAME);