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

/*
 * omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library
 *
 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
 *
 * Author: Jyri Sarha <jsarha@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.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include <uapi/sound/asound.h>
#include <sound/asoundef.h>
#include <sound/omap-pcm.h>
#include <sound/omap-hdmi-audio.h>
#include <video/omapdss.h>

#define DRV_NAME "omap-hdmi-audio"

struct hdmi_audio_data {
	struct snd_soc_card *card;

	const struct omap_hdmi_audio_ops *ops;
	struct device *dssdev;
	struct snd_dmaengine_dai_dma_data dma_data;
	struct omap_dss_audio dss_audio;
	struct snd_aes_iec958 iec;
	struct snd_cea_861_aud_if cea;

	struct mutex current_stream_lock;
	struct snd_pcm_substream *current_stream;
};

static
struct hdmi_audio_data *card_drvdata_substream(struct snd_pcm_substream *ss)
{
	struct snd_soc_pcm_runtime *rtd = ss->private_data;

	return snd_soc_card_get_drvdata(rtd->card);
}

static void hdmi_dai_abort(struct device *dev)
{
	struct hdmi_audio_data *ad = dev_get_drvdata(dev);

	mutex_lock(&ad->current_stream_lock);
	if (ad->current_stream && ad->current_stream->runtime &&
	    snd_pcm_running(ad->current_stream)) {
		dev_err(dev, "HDMI display disabled, aborting playback\n");
		snd_pcm_stream_lock_irq(ad->current_stream);
		snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED);
		snd_pcm_stream_unlock_irq(ad->current_stream);
	}
	mutex_unlock(&ad->current_stream_lock);
}

static int hdmi_dai_startup(struct snd_pcm_substream *substream,
			    struct snd_soc_dai *dai)
{
	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
	int ret;
	/*
	 * 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
	 */
	ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
					 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
	if (ret < 0) {
		dev_err(dai->dev, "could not apply constraint\n");
		return ret;
	}

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

	mutex_lock(&ad->current_stream_lock);
	ad->current_stream = substream;
	mutex_unlock(&ad->current_stream_lock);

	ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort);

	if (ret) {
		mutex_lock(&ad->current_stream_lock);
		ad->current_stream = NULL;
		mutex_unlock(&ad->current_stream_lock);
	}

	return ret;
}

static int hdmi_dai_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *params,
			      struct snd_soc_dai *dai)
{
	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
	struct snd_aes_iec958 *iec = &ad->iec;
	struct snd_cea_861_aud_if *cea = &ad->cea;

	WARN_ON(ad->current_stream != substream);

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

	ad->dss_audio.iec = iec;
	ad->dss_audio.cea = cea;
	/*
	 * 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[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 */

	if (params_channels(params) == 2)
		cea->db4_ca = 0x0;
	else if (params_channels(params) == 6)
		cea->db4_ca = 0xb;
	else
		cea->db4_ca = 0x13;

	if (cea->db4_ca == 0x00)
		cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED;
	else
		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);

	return ad->ops->audio_config(ad->dssdev, &ad->dss_audio);
}

static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
			    struct snd_soc_dai *dai)
{
	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
	int err = 0;

	WARN_ON(ad->current_stream != substream);

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

static void hdmi_dai_shutdown(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct hdmi_audio_data *ad = card_drvdata_substream(substream);

	WARN_ON(ad->current_stream != substream);

	ad->ops->audio_shutdown(ad->dssdev);

	mutex_lock(&ad->current_stream_lock);
	ad->current_stream = NULL;
	mutex_unlock(&ad->current_stream_lock);
}

static const struct snd_soc_dai_ops hdmi_dai_ops = {
	.startup	= hdmi_dai_startup,
	.hw_params	= hdmi_dai_hw_params,
	.trigger	= hdmi_dai_trigger,
	.shutdown	= hdmi_dai_shutdown,
};

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

static struct snd_soc_dai_driver omap5_hdmi_dai = {
	.name = "omap5-hdmi-dai",
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
			  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
			  SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
			  SNDRV_PCM_RATE_192000),
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops = &hdmi_dai_ops,
};

static struct snd_soc_dai_driver omap4_hdmi_dai = {
	.name = "omap4-hdmi-dai",
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
			  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
			  SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
			  SNDRV_PCM_RATE_192000),
		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
	.ops = &hdmi_dai_ops,
};

static int omap_hdmi_audio_probe(struct platform_device *pdev)
{
	struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data;
	struct device *dev = &pdev->dev;
	struct hdmi_audio_data *ad;
	struct snd_soc_dai_driver *dai_drv;
	struct snd_soc_card *card;
	int ret;

	if (!ha) {
		dev_err(dev, "No platform data\n");
		return -EINVAL;
	}

	ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL);
	if (!ad)
		return -ENOMEM;
	ad->dssdev = ha->dev;
	ad->ops = ha->ops;
	ad->dma_data.addr = ha->audio_dma_addr;
	ad->dma_data.filter_data = "audio_tx";
	ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
	mutex_init(&ad->current_stream_lock);

	switch (ha->dss_version) {
	case OMAPDSS_VER_OMAP4430_ES1:
	case OMAPDSS_VER_OMAP4430_ES2:
	case OMAPDSS_VER_OMAP4:
		dai_drv = &omap4_hdmi_dai;
		break;
	case OMAPDSS_VER_OMAP5:
		dai_drv = &omap5_hdmi_dai;
		break;
	default:
		return -EINVAL;
	}
	ret = snd_soc_register_component(ad->dssdev, &omap_hdmi_component,
					 dai_drv, 1);
	if (ret)
		return ret;

	ret = omap_pcm_platform_register(ad->dssdev);
	if (ret)
		return ret;

	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
	if (!card)
		return -ENOMEM;

	card->name = devm_kasprintf(dev, GFP_KERNEL,
				    "HDMI %s", dev_name(ad->dssdev));
	card->owner = THIS_MODULE;
	card->dai_link =
		devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
	card->dai_link->name = card->name;
	card->dai_link->stream_name = card->name;
	card->dai_link->cpu_dai_name = dev_name(ad->dssdev);
	card->dai_link->platform_name = dev_name(ad->dssdev);
	card->dai_link->codec_name = "snd-soc-dummy";
	card->dai_link->codec_dai_name = "snd-soc-dummy-dai";
	card->num_links = 1;
	card->dev = dev;

	ret = snd_soc_register_card(card);
	if (ret) {
		dev_err(dev, "snd_soc_register_card failed (%d)\n", ret);
		snd_soc_unregister_component(ad->dssdev);
		return ret;
	}

	ad->card = card;
	snd_soc_card_set_drvdata(card, ad);

	dev_set_drvdata(dev, ad);

	return 0;
}

static int omap_hdmi_audio_remove(struct platform_device *pdev)
{
	struct hdmi_audio_data *ad = platform_get_drvdata(pdev);

	snd_soc_unregister_card(ad->card);
	snd_soc_unregister_component(ad->dssdev);
	return 0;
}

static struct platform_driver hdmi_audio_driver = {
	.driver = {
		.name = DRV_NAME,
	},
	.probe = omap_hdmi_audio_probe,
	.remove = omap_hdmi_audio_remove,
};

module_platform_driver(hdmi_audio_driver);

MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
MODULE_DESCRIPTION("OMAP HDMI Audio Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
Commit	Line	Data
50211be8 JS	1	/*
	2	* omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library
	3	*
	4	* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
	5	*
	6	* Author: Jyri Sarha <jsarha@ti.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/err.h>
	22	#include <linux/string.h>
	23	#include <linux/platform_device.h>
	24	#include <sound/soc.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/dmaengine_pcm.h>
	27	#include <uapi/sound/asound.h>
	28	#include <sound/asoundef.h>
	29	#include <sound/omap-pcm.h>
	30	#include <sound/omap-hdmi-audio.h>
	31	#include <video/omapdss.h>
	32
	33	#define DRV_NAME "omap-hdmi-audio"
	34
	35	struct hdmi_audio_data {
	36	struct snd_soc_card *card;
	37
	38	const struct omap_hdmi_audio_ops *ops;
	39	struct device *dssdev;
	40	struct snd_dmaengine_dai_dma_data dma_data;
	41	struct omap_dss_audio dss_audio;
	42	struct snd_aes_iec958 iec;
	43	struct snd_cea_861_aud_if cea;
	44
	45	struct mutex current_stream_lock;
	46	struct snd_pcm_substream *current_stream;
	47	};
	48
	49	static
	50	struct hdmi_audio_data card_drvdata_substream(struct snd_pcm_substream ss)
	51	{
	52	struct snd_soc_pcm_runtime *rtd = ss->private_data;
	53
	54	return snd_soc_card_get_drvdata(rtd->card);
	55	}
	56
	57	static void hdmi_dai_abort(struct device *dev)
	58	{
	59	struct hdmi_audio_data *ad = dev_get_drvdata(dev);
	60
	61	mutex_lock(&ad->current_stream_lock);
	62	if (ad->current_stream && ad->current_stream->runtime &&
	63	snd_pcm_running(ad->current_stream)) {
	64	dev_err(dev, "HDMI display disabled, aborting playback\n");
65	snd_pcm_stream_lock_irq(ad->current_stream);
66	snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED);
67	snd_pcm_stream_unlock_irq(ad->current_stream);
68	}
69	mutex_unlock(&ad->current_stream_lock);
70	}
71
72	static int hdmi_dai_startup(struct snd_pcm_substream *substream,
73	struct snd_soc_dai *dai)
74	{
75	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
76	int ret;
77	/*
78	* Make sure that the period bytes are multiple of the DMA packet size.
79	* Largest packet size we use is 32 32-bit words = 128 bytes
80	*/
81	ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
82	SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
83	if (ret < 0) {
84	dev_err(dai->dev, "could not apply constraint\n");
85	return ret;
86	}
87
88	snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data);
89
90	mutex_lock(&ad->current_stream_lock);
91	ad->current_stream = substream;
92	mutex_unlock(&ad->current_stream_lock);
93
94	ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort);
95
96	if (ret) {
97	mutex_lock(&ad->current_stream_lock);
98	ad->current_stream = NULL;
99	mutex_unlock(&ad->current_stream_lock);
100	}
101
102	return ret;
103	}
104
105	static int hdmi_dai_hw_params(struct snd_pcm_substream *substream,
106	struct snd_pcm_hw_params *params,
107	struct snd_soc_dai *dai)
108	{
109	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
110	struct snd_aes_iec958 *iec = &ad->iec;
111	struct snd_cea_861_aud_if *cea = &ad->cea;
112
113	WARN_ON(ad->current_stream != substream);
114
115	switch (params_format(params)) {
116	case SNDRV_PCM_FORMAT_S16_LE:
117	ad->dma_data.maxburst = 16;
118	break;
119	case SNDRV_PCM_FORMAT_S24_LE:
120	ad->dma_data.maxburst = 32;
121	break;
122	default:
123	dev_err(dai->dev, "format not supported!\n");
124	return -EINVAL;
125	}
126
127	ad->dss_audio.iec = iec;
128	ad->dss_audio.cea = cea;
129	/*
130	* fill the IEC-60958 channel status word
131	*/
132	/* initialize the word bytes */
133	memset(iec->status, 0, sizeof(iec->status));
134
135	/* specify IEC-60958-3 (commercial use) */
136	iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
137
138	/* specify that the audio is LPCM*/
139	iec->status[0] &= ~IEC958_AES0_NONAUDIO;
140
141	iec->status[0] \|= IEC958_AES0_CON_NOT_COPYRIGHT;
142
143	iec->status[0] \|= IEC958_AES0_CON_EMPHASIS_NONE;
144
50211be8 JS	145	iec->status[1] = IEC958_AES1_CON_GENERAL;
	146
	147	iec->status[2] \|= IEC958_AES2_CON_SOURCE_UNSPEC;
	148
	149	iec->status[2] \|= IEC958_AES2_CON_CHANNEL_UNSPEC;
	150
	151	switch (params_rate(params)) {
	152	case 32000:
	153	iec->status[3] \|= IEC958_AES3_CON_FS_32000;
	154	break;
	155	case 44100:
	156	iec->status[3] \|= IEC958_AES3_CON_FS_44100;
	157	break;
	158	case 48000:
	159	iec->status[3] \|= IEC958_AES3_CON_FS_48000;
	160	break;
	161	case 88200:
	162	iec->status[3] \|= IEC958_AES3_CON_FS_88200;
	163	break;
	164	case 96000:
	165	iec->status[3] \|= IEC958_AES3_CON_FS_96000;
	166	break;
	167	case 176400:
	168	iec->status[3] \|= IEC958_AES3_CON_FS_176400;
	169	break;
	170	case 192000:
	171	iec->status[3] \|= IEC958_AES3_CON_FS_192000;
	172	break;
	173	default:
	174	dev_err(dai->dev, "rate not supported!\n");
	175	return -EINVAL;
	176	}
	177
	178	/* specify the clock accuracy */
	179	iec->status[3] \|= IEC958_AES3_CON_CLOCK_1000PPM;
	180
	181	/*
	182	* specify the word length. The same word length value can mean
	183	* two different lengths. Hence, we need to specify the maximum
	184	* word length as well.
	185	*/
	186	switch (params_format(params)) {
	187	case SNDRV_PCM_FORMAT_S16_LE:
	188	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_20_16;
	189	iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
	190	break;
	191	case SNDRV_PCM_FORMAT_S24_LE:
	192	iec->status[4] \|= IEC958_AES4_CON_WORDLEN_24_20;
	193	iec->status[4] \|= IEC958_AES4_CON_MAX_WORDLEN_24;
	194	break;
	195	default:
	196	dev_err(dai->dev, "format not supported!\n");
	197	return -EINVAL;
	198	}
	199
	200	/*
	201	* Fill the CEA-861 audio infoframe (see spec for details)
	202	*/
	203
	204	cea->db1_ct_cc = (params_channels(params) - 1)
	205	& CEA861_AUDIO_INFOFRAME_DB1CC;
	206	cea->db1_ct_cc \|= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
	207
	208	cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
209	cea->db2_sf_ss \|= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
210
211	cea->db3 = 0; /* not used, all zeros */
212
50211be8 JS	213	if (params_channels(params) == 2)
50211be8 JS	214	cea->db4_ca = 0x0;
88359b99 MLC	215	else if (params_channels(params) == 6)
88359b99 MLC	216	cea->db4_ca = 0xb;
50211be8 JS	217	else
	218	cea->db4_ca = 0x13;
	219
51603478 MLC	220	if (cea->db4_ca == 0x00)
	221	cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED;
	222	else
	223	cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
	224
50211be8 JS	225	/* the expression is trivial but makes clear what we are doing */
	226	cea->db5_dminh_lsv \|= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
	227
	228	return ad->ops->audio_config(ad->dssdev, &ad->dss_audio);
	229	}
	230
	231	static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	232	struct snd_soc_dai *dai)
	233	{
	234	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
	235	int err = 0;
	236
	237	WARN_ON(ad->current_stream != substream);
	238
	239	switch (cmd) {
	240	case SNDRV_PCM_TRIGGER_START:
	241	case SNDRV_PCM_TRIGGER_RESUME:
	242	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	243	err = ad->ops->audio_start(ad->dssdev);
	244	break;
	245	case SNDRV_PCM_TRIGGER_STOP:
	246	case SNDRV_PCM_TRIGGER_SUSPEND:
	247	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	248	ad->ops->audio_stop(ad->dssdev);
	249	break;
	250	default:
	251	err = -EINVAL;
	252	}
	253	return err;
	254	}
	255
	256	static void hdmi_dai_shutdown(struct snd_pcm_substream *substream,
	257	struct snd_soc_dai *dai)
	258	{
	259	struct hdmi_audio_data *ad = card_drvdata_substream(substream);
	260
	261	WARN_ON(ad->current_stream != substream);
	262
	263	ad->ops->audio_shutdown(ad->dssdev);
	264
	265	mutex_lock(&ad->current_stream_lock);
	266	ad->current_stream = NULL;
	267	mutex_unlock(&ad->current_stream_lock);
	268	}
	269
	270	static const struct snd_soc_dai_ops hdmi_dai_ops = {
	271	.startup = hdmi_dai_startup,
	272	.hw_params = hdmi_dai_hw_params,
	273	.trigger = hdmi_dai_trigger,
	274	.shutdown = hdmi_dai_shutdown,
	275	};
	276
	277	static const struct snd_soc_component_driver omap_hdmi_component = {
	278	.name = "omapdss_hdmi",
	279	};
	280
	281	static struct snd_soc_dai_driver omap5_hdmi_dai = {
	282	.name = "omap5-hdmi-dai",
	283	.playback = {
	284	.channels_min = 2,
	285	.channels_max = 8,
	286	.rates = (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|
	287	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \|
	288	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \|
289	SNDRV_PCM_RATE_192000),
290	.formats = SNDRV_PCM_FMTBIT_S16_LE,
291	},
292	.ops = &hdmi_dai_ops,
293	};
294
295	static struct snd_soc_dai_driver omap4_hdmi_dai = {
296	.name = "omap4-hdmi-dai",
297	.playback = {
298	.channels_min = 2,
299	.channels_max = 8,
300	.rates = (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|
301	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \|
302	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \|
303	SNDRV_PCM_RATE_192000),
304	.formats = SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S24_LE,
305	},
306	.ops = &hdmi_dai_ops,
307	};
308
309	static int omap_hdmi_audio_probe(struct platform_device *pdev)
310	{
311	struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data;
312	struct device *dev = &pdev->dev;
313	struct hdmi_audio_data *ad;
314	struct snd_soc_dai_driver *dai_drv;
315	struct snd_soc_card *card;
316	int ret;
317
318	if (!ha) {
319	dev_err(dev, "No platform data\n");
320	return -EINVAL;
321	}
322
323	ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL);
324	if (!ad)
325	return -ENOMEM;
326	ad->dssdev = ha->dev;
327	ad->ops = ha->ops;
328	ad->dma_data.addr = ha->audio_dma_addr;
329	ad->dma_data.filter_data = "audio_tx";
330	ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
331	mutex_init(&ad->current_stream_lock);
332
333	switch (ha->dss_version) {
334	case OMAPDSS_VER_OMAP4430_ES1:
335	case OMAPDSS_VER_OMAP4430_ES2:
336	case OMAPDSS_VER_OMAP4:
337	dai_drv = &omap4_hdmi_dai;
338	break;
339	case OMAPDSS_VER_OMAP5:
340	dai_drv = &omap5_hdmi_dai;
341	break;
342	default:
343	return -EINVAL;
344	}
345	ret = snd_soc_register_component(ad->dssdev, &omap_hdmi_component,
346	dai_drv, 1);
347	if (ret)
348	return ret;
349
350	ret = omap_pcm_platform_register(ad->dssdev);
351	if (ret)
352	return ret;
353
354	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
fb5ab729 KP	355	if (!card)
	356	return -ENOMEM;
	357
50211be8 JS	358	card->name = devm_kasprintf(dev, GFP_KERNEL,
	359	"HDMI %s", dev_name(ad->dssdev));
	360	card->owner = THIS_MODULE;
	361	card->dai_link =
	362	devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
	363	card->dai_link->name = card->name;
	364	card->dai_link->stream_name = card->name;
	365	card->dai_link->cpu_dai_name = dev_name(ad->dssdev);
	366	card->dai_link->platform_name = dev_name(ad->dssdev);
	367	card->dai_link->codec_name = "snd-soc-dummy";
	368	card->dai_link->codec_dai_name = "snd-soc-dummy-dai";
	369	card->num_links = 1;
	370	card->dev = dev;
	371
	372	ret = snd_soc_register_card(card);
	373	if (ret) {
	374	dev_err(dev, "snd_soc_register_card failed (%d)\n", ret);
	375	snd_soc_unregister_component(ad->dssdev);
	376	return ret;
	377	}
	378
	379	ad->card = card;
	380	snd_soc_card_set_drvdata(card, ad);
	381
	382	dev_set_drvdata(dev, ad);
	383
	384	return 0;
	385	}
	386
	387	static int omap_hdmi_audio_remove(struct platform_device *pdev)
	388	{
	389	struct hdmi_audio_data *ad = platform_get_drvdata(pdev);
	390
	391	snd_soc_unregister_card(ad->card);
	392	snd_soc_unregister_component(ad->dssdev);
	393	return 0;
	394	}
	395
	396	static struct platform_driver hdmi_audio_driver = {
	397	.driver = {
	398	.name = DRV_NAME,
50211be8 JS	399	},
	400	.probe = omap_hdmi_audio_probe,
	401	.remove = omap_hdmi_audio_remove,
	402	};
	403
	404	module_platform_driver(hdmi_audio_driver);
	405
	406	MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
	407	MODULE_DESCRIPTION("OMAP HDMI Audio Driver");
	408	MODULE_LICENSE("GPL");
	409	MODULE_ALIAS("platform:" DRV_NAME);