[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 <video/omapdss.h>

#include "omap-pcm.h"
#include "omap-hdmi.h"

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

struct hdmi_priv {
	struct omap_pcm_dma_data dma_params;
	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;
	}
	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_params.packet_size = 16;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		priv->dma_params.packet_size = 32;
		break;
	default:
		dev_err(dai->dev, "format not supported!\n");
		return -EINVAL;
	}

	priv->dma_params.data_type = 32;

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

	/*
	 * fill the IEC-60958 channel status word
	 */

	/* 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 __devinit 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_params.port_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_params.dma_req =  hdmi_rsrc->start;
	hdmi_data->dma_params.name = "HDMI playback";

	/*
	 * 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_dai(&pdev->dev, &omap_hdmi_dai);

	return ret;
}

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

	snd_soc_unregister_dai(&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 = __devexit_p(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>
a48d9b75	35	#include <video/omapdss.h>
bca2e41d	36
bca2e41d RN	37	#include "omap-pcm.h"
	38	#include "omap-hdmi.h"
	39
e412ec64	40	#define DRV_NAME "omap-hdmi-audio-dai"
bca2e41d	41
26039153 RN	42	struct hdmi_priv {
26039153 RN	43	struct omap_pcm_dma_data dma_params;
7e6aa220 RN	44	struct omap_dss_audio dss_audio;
	45	struct snd_aes_iec958 iec;
	46	struct snd_cea_861_aud_if cea;
a48d9b75	47	struct omap_dss_device *dssdev;
bca2e41d RN	48	};
	49
	50	static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
	51	struct snd_soc_dai *dai)
	52	{
a0534e3b	53	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
bca2e41d RN	54	int err;
	55	/*
	56	* Make sure that the period bytes are multiple of the DMA packet size.
	57	* Largest packet size we use is 32 32-bit words = 128 bytes
	58	*/
	59	err = snd_pcm_hw_constraint_step(substream->runtime, 0,
	60	SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
a0534e3b RN	61	if (err < 0) {
a0534e3b RN	62	dev_err(dai->dev, "could not apply constraint\n");
bca2e41d	63	return err;
a0534e3b	64	}
bca2e41d	65
a0534e3b RN	66	if (!priv->dssdev->driver->audio_supported(priv->dssdev)) {
	67	dev_err(dai->dev, "audio not supported\n");
	68	return -ENODEV;
	69	}
bca2e41d RN	70	return 0;
	71	}
	72
a48d9b75 RN	73	static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream,
	74	struct snd_soc_dai *dai)
	75	{
	76	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	77
	78	return priv->dssdev->driver->audio_enable(priv->dssdev);
	79	}
	80
bca2e41d RN	81	static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
	82	struct snd_pcm_hw_params *params,
	83	struct snd_soc_dai *dai)
	84	{
26039153	85	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
7e6aa220 RN	86	struct snd_aes_iec958 *iec = &priv->iec;
7e6aa220 RN	87	struct snd_cea_861_aud_if *cea = &priv->cea;
bca2e41d RN	88	int err = 0;
	89
	90	switch (params_format(params)) {
	91	case SNDRV_PCM_FORMAT_S16_LE:
26039153	92	priv->dma_params.packet_size = 16;
bca2e41d RN	93	break;
bca2e41d RN	94	case SNDRV_PCM_FORMAT_S24_LE:
26039153	95	priv->dma_params.packet_size = 32;
bca2e41d RN	96	break;
bca2e41d RN	97	default:
7e6aa220 RN	98	dev_err(dai->dev, "format not supported!\n");
7e6aa220 RN	99	return -EINVAL;
bca2e41d RN	100	}
bca2e41d RN	101
f05cc9da	102	priv->dma_params.data_type = 32;
bca2e41d RN	103
bca2e41d RN	104	snd_soc_dai_set_dma_data(dai, substream,
26039153	105	&priv->dma_params);
bca2e41d	106
7e6aa220 RN	107	/*
	108	* fill the IEC-60958 channel status word
	109	*/
	110
	111	/* specify IEC-60958-3 (commercial use) */
	112	iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
	113
	114	/* specify that the audio is LPCM*/
	115	iec->status[0] &= ~IEC958_AES0_NONAUDIO;
	116
	117	iec->status[0] \|= IEC958_AES0_CON_NOT_COPYRIGHT;
	118
	119	iec->status[0] \|= IEC958_AES0_CON_EMPHASIS_NONE;
	120
	121	iec->status[0] \|= IEC958_AES1_PRO_MODE_NOTID;
	122
	123	iec->status[1] = IEC958_AES1_CON_GENERAL;
	124
	125	iec->status[2] \|= IEC958_AES2_CON_SOURCE_UNSPEC;
	126
	127	iec->status[2] \|= IEC958_AES2_CON_CHANNEL_UNSPEC;
	128
	129	switch (params_rate(params)) {
	130	case 32000:
	131	iec->status[3] \|= IEC958_AES3_CON_FS_32000;
	132	break;
	133	case 44100:
	134	iec->status[3] \|= IEC958_AES3_CON_FS_44100;
	135	break;
	136	case 48000:
	137	iec->status[3] \|= IEC958_AES3_CON_FS_48000;
	138	break;
	139	case 88200:
	140	iec->status[3] \|= IEC958_AES3_CON_FS_88200;
	141	break;
	142	case 96000:
	143	iec->status[3] \|= IEC958_AES3_CON_FS_96000;
	144	break;
	145	case 176400:
	146	iec->status[3] \|= IEC958_AES3_CON_FS_176400;
	147	break;
	148	case 192000:
	149	iec->status[3] \|= IEC958_AES3_CON_FS_192000;
	150	break;
	151	default:
	152	dev_err(dai->dev, "rate not supported!\n");
	153	return -EINVAL;
	154	}
	155
	156	/* specify the clock accuracy */
	157	iec->status[3] \|= IEC958_AES3_CON_CLOCK_1000PPM;
	158
	159	/*
	160	* specify the word length. The same word length value can mean
	161	* two different lengths. Hence, we need to specify the maximum
	162	* word length as well.
	163	*/
	164	switch (params_format(params)) {
	165	case SNDRV_PCM_FORMAT_S16_LE:
	166	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_20_16;
	167	iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
	168	break;
	169	case SNDRV_PCM_FORMAT_S24_LE:
	170	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_24_20;
171	iec->status[4] \|= IEC958_AES4_CON_MAX_WORDLEN_24;
172	break;
173	default:
174	dev_err(dai->dev, "format not supported!\n");
175	return -EINVAL;
176	}
177
178	/*
179	* Fill the CEA-861 audio infoframe (see spec for details)
180	*/
181
182	cea->db1_ct_cc = (params_channels(params) - 1)
183	& CEA861_AUDIO_INFOFRAME_DB1CC;
184	cea->db1_ct_cc \|= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
185
186	cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
187	cea->db2_sf_ss \|= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
188
189	cea->db3 = 0; /* not used, all zeros */
190
191	/*
192	* The OMAP HDMI IP requires to use the 8-channel channel code when
193	* transmitting more than two channels.
194	*/
195	if (params_channels(params) == 2)
196	cea->db4_ca = 0x0;
197	else
198	cea->db4_ca = 0x13;
199
200	cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
201	/* the expression is trivial but makes clear what we are doing */
202	cea->db5_dminh_lsv \|= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
203
204	priv->dss_audio.iec = iec;
205	priv->dss_audio.cea = cea;
206
207	err = priv->dssdev->driver->audio_config(priv->dssdev,
208	&priv->dss_audio);
209
bca2e41d RN	210	return err;
	211	}
	212
a48d9b75 RN	213	static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	214	struct snd_soc_dai *dai)
	215	{
	216	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	217	int err = 0;
	218
	219	switch (cmd) {
	220	case SNDRV_PCM_TRIGGER_START:
	221	case SNDRV_PCM_TRIGGER_RESUME:
	222	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	223	err = priv->dssdev->driver->audio_start(priv->dssdev);
	224	break;
	225	case SNDRV_PCM_TRIGGER_STOP:
	226	case SNDRV_PCM_TRIGGER_SUSPEND:
	227	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	228	priv->dssdev->driver->audio_stop(priv->dssdev);
	229	break;
	230	default:
	231	err = -EINVAL;
	232	}
	233	return err;
	234	}
	235
	236	static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
	237	struct snd_soc_dai *dai)
	238	{
	239	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	240
	241	priv->dssdev->driver->audio_disable(priv->dssdev);
	242	}
	243
85e7652d	244	static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
bca2e41d RN	245	.startup = omap_hdmi_dai_startup,
bca2e41d RN	246	.hw_params = omap_hdmi_dai_hw_params,
7e6aa220 RN	247	.prepare = omap_hdmi_dai_prepare,
	248	.trigger = omap_hdmi_dai_trigger,
	249	.shutdown = omap_hdmi_dai_shutdown,
bca2e41d RN	250	};
	251
	252	static struct snd_soc_dai_driver omap_hdmi_dai = {
	253	.playback = {
	254	.channels_min = 2,
a1ab92da	255	.channels_max = 8,
bca2e41d RN	256	.rates = OMAP_HDMI_RATES,
	257	.formats = OMAP_HDMI_FORMATS,
	258	},
	259	.ops = &omap_hdmi_dai_ops,
	260	};
	261
	262	static __devinit int omap_hdmi_probe(struct platform_device *pdev)
	263	{
	264	int ret;
	265	struct resource *hdmi_rsrc;
26039153	266	struct hdmi_priv *hdmi_data;
a48d9b75	267	bool hdmi_dev_found = false;
26039153 RN	268
	269	hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
	270	if (hdmi_data == NULL) {
	271	dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n");
	272	return -ENOMEM;
	273	}
bca2e41d RN	274
	275	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	276	if (!hdmi_rsrc) {
	277	dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n");
0ff5ee87	278	return -ENODEV;
bca2e41d RN	279	}
bca2e41d RN	280
26039153	281	hdmi_data->dma_params.port_addr = hdmi_rsrc->start
bca2e41d RN	282	+ OMAP_HDMI_AUDIO_DMA_PORT;
	283
	284	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	285	if (!hdmi_rsrc) {
	286	dev_err(&pdev->dev, "Cannot obtain IORESOURCE_DMA HDMI\n");
0ff5ee87	287	return -ENODEV;
bca2e41d RN	288	}
bca2e41d RN	289
26039153 RN	290	hdmi_data->dma_params.dma_req = hdmi_rsrc->start;
26039153 RN	291	hdmi_data->dma_params.name = "HDMI playback";
bca2e41d	292
a48d9b75 RN	293	/*
	294	* TODO: We assume that there is only one DSS HDMI device. Future
	295	* OMAP implementations may support more than one HDMI devices and
	296	* we should provided separate audio support for all of them.
	297	*/
	298	/* Find an HDMI device. */
	299	for_each_dss_dev(hdmi_data->dssdev) {
	300	omap_dss_get_device(hdmi_data->dssdev);
	301
	302	if (!hdmi_data->dssdev->driver) {
	303	omap_dss_put_device(hdmi_data->dssdev);
	304	continue;
	305	}
	306
	307	if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
	308	hdmi_dev_found = true;
	309	break;
	310	}
	311	}
	312
	313	if (!hdmi_dev_found) {
	314	dev_err(&pdev->dev, "no driver for HDMI display found\n");
	315	return -ENODEV;
	316	}
	317
26039153	318	dev_set_drvdata(&pdev->dev, hdmi_data);
bca2e41d	319	ret = snd_soc_register_dai(&pdev->dev, &omap_hdmi_dai);
a48d9b75	320
bca2e41d RN	321	return ret;
	322	}
	323
	324	static int __devexit omap_hdmi_remove(struct platform_device *pdev)
	325	{
a48d9b75 RN	326	struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev);
a48d9b75 RN	327
bca2e41d	328	snd_soc_unregister_dai(&pdev->dev);
a48d9b75 RN	329
	330	if (hdmi_data == NULL) {
	331	dev_err(&pdev->dev, "cannot obtain HDMi data\n");
	332	return -ENODEV;
	333	}
	334
	335	omap_dss_put_device(hdmi_data->dssdev);
bca2e41d RN	336	return 0;
	337	}
	338
	339	static struct platform_driver hdmi_dai_driver = {
	340	.driver = {
	341	.name = DRV_NAME,
	342	.owner = THIS_MODULE,
	343	},
	344	.probe = omap_hdmi_probe,
	345	.remove = __devexit_p(omap_hdmi_remove),
	346	};
	347
beda5bf5	348	module_platform_driver(hdmi_dai_driver);
bca2e41d RN	349
	350	MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>");
	351	MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
	352	MODULE_DESCRIPTION("OMAP HDMI SoC Interface");
	353	MODULE_LICENSE("GPL");
	354	MODULE_ALIAS("platform:" DRV_NAME);