[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;
	}

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

	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;
	struct omap_pcm_dma_data *dma_data;
	int err = 0;

	dma_data = snd_soc_dai_get_dma_data(dai, substream);

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

	dma_data->data_type = 32;

	/*
	 * 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 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 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 = 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	}
bcd6da7b PU	70
	71	snd_soc_dai_set_dma_data(dai, substream, &priv->dma_params);
	72
bca2e41d RN	73	return 0;
	74	}
	75
a48d9b75 RN	76	static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream,
	77	struct snd_soc_dai *dai)
	78	{
	79	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	80
	81	return priv->dssdev->driver->audio_enable(priv->dssdev);
	82	}
	83
bca2e41d RN	84	static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
	85	struct snd_pcm_hw_params *params,
	86	struct snd_soc_dai *dai)
	87	{
26039153	88	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
7e6aa220 RN	89	struct snd_aes_iec958 *iec = &priv->iec;
7e6aa220 RN	90	struct snd_cea_861_aud_if *cea = &priv->cea;
bcd6da7b	91	struct omap_pcm_dma_data *dma_data;
bca2e41d RN	92	int err = 0;
bca2e41d RN	93
bcd6da7b PU	94	dma_data = snd_soc_dai_get_dma_data(dai, substream);
bcd6da7b PU	95
bca2e41d RN	96	switch (params_format(params)) {
bca2e41d RN	97	case SNDRV_PCM_FORMAT_S16_LE:
bcd6da7b	98	dma_data->packet_size = 16;
bca2e41d RN	99	break;
bca2e41d RN	100	case SNDRV_PCM_FORMAT_S24_LE:
bcd6da7b	101	dma_data->packet_size = 32;
bca2e41d RN	102	break;
bca2e41d RN	103	default:
7e6aa220 RN	104	dev_err(dai->dev, "format not supported!\n");
7e6aa220 RN	105	return -EINVAL;
bca2e41d RN	106	}
bca2e41d RN	107
bcd6da7b	108	dma_data->data_type = 32;
bca2e41d	109
7e6aa220 RN	110	/*
	111	* fill the IEC-60958 channel status word
	112	*/
a88fedfd RN	113	/* initialize the word bytes */
a88fedfd RN	114	memset(iec->status, 0, sizeof(iec->status));
7e6aa220 RN	115
	116	/* specify IEC-60958-3 (commercial use) */
	117	iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
	118
	119	/* specify that the audio is LPCM*/
	120	iec->status[0] &= ~IEC958_AES0_NONAUDIO;
	121
	122	iec->status[0] \|= IEC958_AES0_CON_NOT_COPYRIGHT;
	123
	124	iec->status[0] \|= IEC958_AES0_CON_EMPHASIS_NONE;
	125
	126	iec->status[0] \|= IEC958_AES1_PRO_MODE_NOTID;
	127
	128	iec->status[1] = IEC958_AES1_CON_GENERAL;
	129
	130	iec->status[2] \|= IEC958_AES2_CON_SOURCE_UNSPEC;
	131
	132	iec->status[2] \|= IEC958_AES2_CON_CHANNEL_UNSPEC;
	133
	134	switch (params_rate(params)) {
	135	case 32000:
	136	iec->status[3] \|= IEC958_AES3_CON_FS_32000;
	137	break;
	138	case 44100:
	139	iec->status[3] \|= IEC958_AES3_CON_FS_44100;
	140	break;
	141	case 48000:
	142	iec->status[3] \|= IEC958_AES3_CON_FS_48000;
	143	break;
	144	case 88200:
	145	iec->status[3] \|= IEC958_AES3_CON_FS_88200;
	146	break;
	147	case 96000:
	148	iec->status[3] \|= IEC958_AES3_CON_FS_96000;
	149	break;
	150	case 176400:
	151	iec->status[3] \|= IEC958_AES3_CON_FS_176400;
	152	break;
	153	case 192000:
	154	iec->status[3] \|= IEC958_AES3_CON_FS_192000;
	155	break;
	156	default:
	157	dev_err(dai->dev, "rate not supported!\n");
	158	return -EINVAL;
	159	}
	160
	161	/* specify the clock accuracy */
	162	iec->status[3] \|= IEC958_AES3_CON_CLOCK_1000PPM;
	163
	164	/*
	165	* specify the word length. The same word length value can mean
	166	* two different lengths. Hence, we need to specify the maximum
	167	* word length as well.
	168	*/
	169	switch (params_format(params)) {
	170	case SNDRV_PCM_FORMAT_S16_LE:
	171	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_20_16;
	172	iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
	173	break;
	174	case SNDRV_PCM_FORMAT_S24_LE:
	175	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_24_20;
	176	iec->status[4] \|= IEC958_AES4_CON_MAX_WORDLEN_24;
	177	break;
	178	default:
179	dev_err(dai->dev, "format not supported!\n");
180	return -EINVAL;
181	}
182
183	/*
184	* Fill the CEA-861 audio infoframe (see spec for details)
185	*/
186
187	cea->db1_ct_cc = (params_channels(params) - 1)
188	& CEA861_AUDIO_INFOFRAME_DB1CC;
189	cea->db1_ct_cc \|= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
190
191	cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
192	cea->db2_sf_ss \|= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
193
194	cea->db3 = 0; /* not used, all zeros */
195
196	/*
197	* The OMAP HDMI IP requires to use the 8-channel channel code when
198	* transmitting more than two channels.
199	*/
200	if (params_channels(params) == 2)
201	cea->db4_ca = 0x0;
202	else
203	cea->db4_ca = 0x13;
204
205	cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
206	/* the expression is trivial but makes clear what we are doing */
207	cea->db5_dminh_lsv \|= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
208
209	priv->dss_audio.iec = iec;
210	priv->dss_audio.cea = cea;
211
212	err = priv->dssdev->driver->audio_config(priv->dssdev,
213	&priv->dss_audio);
214
bca2e41d RN	215	return err;
	216	}
	217
a48d9b75 RN	218	static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	219	struct snd_soc_dai *dai)
	220	{
	221	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	222	int err = 0;
	223
	224	switch (cmd) {
	225	case SNDRV_PCM_TRIGGER_START:
	226	case SNDRV_PCM_TRIGGER_RESUME:
	227	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	228	err = priv->dssdev->driver->audio_start(priv->dssdev);
	229	break;
	230	case SNDRV_PCM_TRIGGER_STOP:
	231	case SNDRV_PCM_TRIGGER_SUSPEND:
	232	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	233	priv->dssdev->driver->audio_stop(priv->dssdev);
	234	break;
	235	default:
	236	err = -EINVAL;
	237	}
	238	return err;
	239	}
	240
	241	static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
	242	struct snd_soc_dai *dai)
	243	{
	244	struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
	245
	246	priv->dssdev->driver->audio_disable(priv->dssdev);
	247	}
	248
85e7652d	249	static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
bca2e41d RN	250	.startup = omap_hdmi_dai_startup,
bca2e41d RN	251	.hw_params = omap_hdmi_dai_hw_params,
7e6aa220 RN	252	.prepare = omap_hdmi_dai_prepare,
	253	.trigger = omap_hdmi_dai_trigger,
	254	.shutdown = omap_hdmi_dai_shutdown,
bca2e41d RN	255	};
	256
	257	static struct snd_soc_dai_driver omap_hdmi_dai = {
	258	.playback = {
	259	.channels_min = 2,
a1ab92da	260	.channels_max = 8,
bca2e41d RN	261	.rates = OMAP_HDMI_RATES,
	262	.formats = OMAP_HDMI_FORMATS,
	263	},
	264	.ops = &omap_hdmi_dai_ops,
	265	};
	266
7ff60006	267	static int omap_hdmi_probe(struct platform_device *pdev)
bca2e41d RN	268	{
	269	int ret;
	270	struct resource *hdmi_rsrc;
26039153	271	struct hdmi_priv *hdmi_data;
a48d9b75	272	bool hdmi_dev_found = false;
26039153 RN	273
	274	hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
	275	if (hdmi_data == NULL) {
	276	dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n");
	277	return -ENOMEM;
	278	}
bca2e41d RN	279
	280	hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	281	if (!hdmi_rsrc) {
	282	dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n");
0ff5ee87	283	return -ENODEV;
bca2e41d RN	284	}
bca2e41d RN	285
26039153	286	hdmi_data->dma_params.port_addr = hdmi_rsrc->start
bca2e41d RN	287	+ OMAP_HDMI_AUDIO_DMA_PORT;
	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
26039153 RN	295	hdmi_data->dma_params.dma_req = hdmi_rsrc->start;
26039153 RN	296	hdmi_data->dma_params.name = "HDMI playback";
bca2e41d	297
a48d9b75 RN	298	/*
	299	* TODO: We assume that there is only one DSS HDMI device. Future
	300	* OMAP implementations may support more than one HDMI devices and
	301	* we should provided separate audio support for all of them.
	302	*/
	303	/* Find an HDMI device. */
	304	for_each_dss_dev(hdmi_data->dssdev) {
	305	omap_dss_get_device(hdmi_data->dssdev);
	306
	307	if (!hdmi_data->dssdev->driver) {
	308	omap_dss_put_device(hdmi_data->dssdev);
	309	continue;
	310	}
	311
	312	if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
	313	hdmi_dev_found = true;
	314	break;
	315	}
	316	}
	317
	318	if (!hdmi_dev_found) {
	319	dev_err(&pdev->dev, "no driver for HDMI display found\n");
	320	return -ENODEV;
	321	}
	322
26039153	323	dev_set_drvdata(&pdev->dev, hdmi_data);
bca2e41d	324	ret = snd_soc_register_dai(&pdev->dev, &omap_hdmi_dai);
a48d9b75	325
bca2e41d RN	326	return ret;
	327	}
	328
7ff60006	329	static int omap_hdmi_remove(struct platform_device *pdev)
bca2e41d	330	{
a48d9b75 RN	331	struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev);
a48d9b75 RN	332
bca2e41d	333	snd_soc_unregister_dai(&pdev->dev);
a48d9b75 RN	334
	335	if (hdmi_data == NULL) {
	336	dev_err(&pdev->dev, "cannot obtain HDMi data\n");
	337	return -ENODEV;
	338	}
	339
	340	omap_dss_put_device(hdmi_data->dssdev);
bca2e41d RN	341	return 0;
	342	}
	343
	344	static struct platform_driver hdmi_dai_driver = {
	345	.driver = {
	346	.name = DRV_NAME,
	347	.owner = THIS_MODULE,
	348	},
	349	.probe = omap_hdmi_probe,
7ff60006	350	.remove = omap_hdmi_remove,
bca2e41d RN	351	};
bca2e41d RN	352
beda5bf5	353	module_platform_driver(hdmi_dai_driver);
bca2e41d RN	354
	355	MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>");
	356	MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
	357	MODULE_DESCRIPTION("OMAP HDMI SoC Interface");
	358	MODULE_LICENSE("GPL");
	359	MODULE_ALIAS("platform:" DRV_NAME);