[linux-2.6-block.git] / sound / soc / codecs / dmic.c

/*
 * dmic.c  --  SoC audio for Generic Digital MICs
 *
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 *
 * 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/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

static int dmic_daiops_trigger(struct snd_pcm_substream *substream,
		int cmd, struct snd_soc_dai *dai)
{
	struct gpio_desc *dmic_en = snd_soc_dai_get_drvdata(dai);

	if (!dmic_en)
		return 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		gpiod_set_value(dmic_en, 1);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		gpiod_set_value(dmic_en, 0);
		break;
	}

	return 0;
}

static const struct snd_soc_dai_ops dmic_dai_ops = {
	.trigger	= dmic_daiops_trigger,
};

static struct snd_soc_dai_driver dmic_dai = {
	.name = "dmic-hifi",
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
		.formats = SNDRV_PCM_FMTBIT_S32_LE
			| SNDRV_PCM_FMTBIT_S24_LE
			| SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops    = &dmic_dai_ops,
};

static int dmic_codec_probe(struct snd_soc_codec *codec)
{
	struct gpio_desc *dmic_en;

	dmic_en = devm_gpiod_get_optional(codec->dev,
					"dmicen", GPIOD_OUT_LOW);
	if (IS_ERR(dmic_en))
		return PTR_ERR(dmic_en);

	snd_soc_codec_set_drvdata(codec, dmic_en);

	return 0;
}

static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
	SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0,
			     SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_INPUT("DMic"),
};

static const struct snd_soc_dapm_route intercon[] = {
	{"DMIC AIF", NULL, "DMic"},
};

static const struct snd_soc_codec_driver soc_dmic = {
	.probe = dmic_codec_probe,
	.component_driver = {
		.dapm_widgets		= dmic_dapm_widgets,
		.num_dapm_widgets	= ARRAY_SIZE(dmic_dapm_widgets),
		.dapm_routes		= intercon,
		.num_dapm_routes	= ARRAY_SIZE(intercon),
	},
};

static int dmic_dev_probe(struct platform_device *pdev)
{
	int err;
	u32 chans;
	struct snd_soc_dai_driver *dai_drv = &dmic_dai;

	if (pdev->dev.of_node) {
		err = of_property_read_u32(pdev->dev.of_node, "num-channels", &chans);
		if (err && (err != -EINVAL))
			return err;

		if (!err) {
			if (chans < 1 || chans > 8)
				return -EINVAL;

			dai_drv = devm_kzalloc(&pdev->dev, sizeof(*dai_drv), GFP_KERNEL);
			if (!dai_drv)
				return -ENOMEM;

			memcpy(dai_drv, &dmic_dai, sizeof(*dai_drv));
			dai_drv->capture.channels_max = chans;
		}
	}

	return snd_soc_register_codec(&pdev->dev,
			&soc_dmic, dai_drv, 1);
}

static int dmic_dev_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

MODULE_ALIAS("platform:dmic-codec");

static const struct of_device_id dmic_dev_match[] = {
	{.compatible = "dmic-codec"},
	{}
};

static struct platform_driver dmic_driver = {
	.driver = {
		.name = "dmic-codec",
		.of_match_table = dmic_dev_match,
	},
	.probe = dmic_dev_probe,
	.remove = dmic_dev_remove,
};

module_platform_driver(dmic_driver);

MODULE_DESCRIPTION("Generic DMIC driver");
MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
MODULE_LICENSE("GPL");
Commit	Line	Data
a710770e DL	1	/*
	2	* dmic.c -- SoC audio for Generic Digital MICs
	3	*
	4	* Author: Liam Girdwood <lrg@slimlogic.co.uk>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* version 2 as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	18	* 02110-1301 USA
	19	*
	20	*/
	21
23c7159a	22	#include <linux/gpio.h>
23c7159a	23	#include <linux/gpio/consumer.h>
a710770e DL	24	#include <linux/platform_device.h>
a710770e DL	25	#include <linux/slab.h>
da155d5b	26	#include <linux/module.h>
a710770e DL	27	#include <sound/core.h>
	28	#include <sound/pcm.h>
	29	#include <sound/soc.h>
	30	#include <sound/soc-dapm.h>
	31
23c7159a	32	static int dmic_daiops_trigger(struct snd_pcm_substream *substream,
	33	int cmd, struct snd_soc_dai *dai)
	34	{
	35	struct gpio_desc *dmic_en = snd_soc_dai_get_drvdata(dai);
	36
	37	if (!dmic_en)
	38	return 0;
	39
	40	switch (cmd) {
	41	case SNDRV_PCM_TRIGGER_START:
	42	case SNDRV_PCM_TRIGGER_RESUME:
	43	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	44	gpiod_set_value(dmic_en, 1);
	45	break;
	46	case SNDRV_PCM_TRIGGER_STOP:
	47	case SNDRV_PCM_TRIGGER_SUSPEND:
	48	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	49	gpiod_set_value(dmic_en, 0);
	50	break;
	51	}
	52
	53	return 0;
	54	}
	55
	56	static const struct snd_soc_dai_ops dmic_dai_ops = {
	57	.trigger = dmic_daiops_trigger,
	58	};
	59
a710770e DL	60	static struct snd_soc_dai_driver dmic_dai = {
	61	.name = "dmic-hifi",
	62	.capture = {
	63	.stream_name = "Capture",
	64	.channels_min = 1,
	65	.channels_max = 8,
	66	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	67	.formats = SNDRV_PCM_FMTBIT_S32_LE
	68	\| SNDRV_PCM_FMTBIT_S24_LE
	69	\| SNDRV_PCM_FMTBIT_S16_LE,
	70	},
23c7159a	71	.ops = &dmic_dai_ops,
a710770e DL	72	};
a710770e DL	73
23c7159a	74	static int dmic_codec_probe(struct snd_soc_codec *codec)
	75	{
	76	struct gpio_desc *dmic_en;
	77
	78	dmic_en = devm_gpiod_get_optional(codec->dev,
	79	"dmicen", GPIOD_OUT_LOW);
	80	if (IS_ERR(dmic_en))
	81	return PTR_ERR(dmic_en);
	82
	83	snd_soc_codec_set_drvdata(codec, dmic_en);
	84
	85	return 0;
	86	}
	87
d5e4b0ad MLC	88	static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
	89	SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0,
	90	SND_SOC_NOPM, 0, 0),
	91	SND_SOC_DAPM_INPUT("DMic"),
	92	};
	93
	94	static const struct snd_soc_dapm_route intercon[] = {
	95	{"DMIC AIF", NULL, "DMic"},
	96	};
	97
23c7159a	98	static const struct snd_soc_codec_driver soc_dmic = {
23c7159a	99	.probe = dmic_codec_probe,
a73b8e89 KM	100	.component_driver = {
	101	.dapm_widgets = dmic_dapm_widgets,
	102	.num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets),
	103	.dapm_routes = intercon,
	104	.num_dapm_routes = ARRAY_SIZE(intercon),
	105	},
d5e4b0ad	106	};
a710770e	107
7a79e94e	108	static int dmic_dev_probe(struct platform_device *pdev)
a710770e	109	{
7fb59e94 MK	110	int err;
	111	u32 chans;
	112	struct snd_soc_dai_driver *dai_drv = &dmic_dai;
	113
	114	if (pdev->dev.of_node) {
	115	err = of_property_read_u32(pdev->dev.of_node, "num-channels", &chans);
35b84bf0	116	if (err && (err != -EINVAL))
7fb59e94 MK	117	return err;
	118
	119	if (!err) {
	120	if (chans < 1 \|\| chans > 8)
	121	return -EINVAL;
	122
	123	dai_drv = devm_kzalloc(&pdev->dev, sizeof(*dai_drv), GFP_KERNEL);
	124	if (!dai_drv)
	125	return -ENOMEM;
	126
	127	memcpy(dai_drv, &dmic_dai, sizeof(*dai_drv));
	128	dai_drv->capture.channels_max = chans;
	129	}
	130	}
	131
a710770e	132	return snd_soc_register_codec(&pdev->dev,
7fb59e94	133	&soc_dmic, dai_drv, 1);
a710770e DL	134	}
a710770e DL	135
7a79e94e	136	static int dmic_dev_remove(struct platform_device *pdev)
a710770e DL	137	{
	138	snd_soc_unregister_codec(&pdev->dev);
	139	return 0;
	140	}
	141
	142	MODULE_ALIAS("platform:dmic-codec");
	143
29685e20 AP	144	static const struct of_device_id dmic_dev_match[] = {
	145	{.compatible = "dmic-codec"},
	146	{}
	147	};
	148
a710770e DL	149	static struct platform_driver dmic_driver = {
	150	.driver = {
	151	.name = "dmic-codec",
29685e20	152	.of_match_table = dmic_dev_match,
a710770e DL	153	},
a710770e DL	154	.probe = dmic_dev_probe,
7a79e94e	155	.remove = dmic_dev_remove,
a710770e DL	156	};
a710770e DL	157
5bbcc3c0	158	module_platform_driver(dmic_driver);
a710770e DL	159
	160	MODULE_DESCRIPTION("Generic DMIC driver");
	161	MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
	162	MODULE_LICENSE("GPL");