[deliverable/linux.git] / sound / soc / sh / migor.c

/*
 * ALSA SoC driver for Migo-R
 *
 * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 *
 * 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.
 */

#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/module.h>

#include <asm/clkdev.h>
#include <asm/clock.h>

#include <cpu/sh7722.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include "../codecs/wm8978.h"
#include "siu.h"

/* Default 8000Hz sampling frequency */
static unsigned long codec_freq = 8000 * 512;

static unsigned int use_count;

/* External clock, sourced from the codec at the SIUMCKB pin */
static unsigned long siumckb_recalc(struct clk *clk)
{
	return codec_freq;
}

static struct clk_ops siumckb_clk_ops = {
	.recalc = siumckb_recalc,
};

static struct clk siumckb_clk = {
	.ops		= &siumckb_clk_ops,
	.rate		= 0, /* initialised at run-time */
};

static struct clk_lookup *siumckb_lookup;

static int migor_hw_params(struct snd_pcm_substream *substream,
			   struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	int ret;
	unsigned int rate = params_rate(params);

	ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000,
				     SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_NB_IF |
				  SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_fmt(rtd->cpu_dai, SND_SOC_DAIFMT_NB_IF |
				  SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	codec_freq = rate * 512;
	/*
	 * This propagates the parent frequency change to children and
	 * recalculates the frequency table
	 */
	clk_set_rate(&siumckb_clk, codec_freq);
	dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq);

	ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, SIU_CLKB_EXT,
				     codec_freq / 2, SND_SOC_CLOCK_IN);

	if (!ret)
		use_count++;

	return ret;
}

static int migor_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;

	if (use_count) {
		use_count--;

		if (!use_count)
			snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0,
					       SND_SOC_CLOCK_IN);
	} else {
		dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n");
	}

	return 0;
}

static struct snd_soc_ops migor_dai_ops = {
	.hw_params = migor_hw_params,
	.hw_free = migor_hw_free,
};

static const struct snd_soc_dapm_widget migor_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Onboard Microphone", NULL),
	SND_SOC_DAPM_MIC("External Microphone", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
	/* Headphone output connected to LHP/RHP, enable OUT4 for VMID */
	{ "Headphone", NULL,  "OUT4 VMID" },
	{ "OUT4 VMID", NULL,  "LHP" },
	{ "OUT4 VMID", NULL,  "RHP" },

	/* On-board microphone */
	{ "RMICN", NULL, "Mic Bias" },
	{ "RMICP", NULL, "Mic Bias" },
	{ "Mic Bias", NULL, "Onboard Microphone" },

	/* External microphone */
	{ "LMICN", NULL, "Mic Bias" },
	{ "LMICP", NULL, "Mic Bias" },
	{ "Mic Bias", NULL, "External Microphone" },
};

static int migor_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	snd_soc_dapm_new_controls(dapm, migor_dapm_widgets,
				  ARRAY_SIZE(migor_dapm_widgets));

	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

	return 0;
}

/* migor digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link migor_dai = {
	.name = "wm8978",
	.stream_name = "WM8978",
	.cpu_dai_name = "siu-i2s-dai",
	.codec_dai_name = "wm8978-hifi",
	.platform_name = "siu-pcm-audio",
	.codec_name = "wm8978.0-001a",
	.ops = &migor_dai_ops,
	.init = migor_dai_init,
};

/* migor audio machine driver */
static struct snd_soc_card snd_soc_migor = {
	.name = "Migo-R",
	.dai_link = &migor_dai,
	.num_links = 1,
};

static struct platform_device *migor_snd_device;

static int __init migor_init(void)
{
	int ret;

	ret = clk_register(&siumckb_clk);
	if (ret < 0)
		return ret;

	siumckb_lookup = clkdev_alloc(&siumckb_clk, "siumckb_clk", NULL);
	if (!siumckb_lookup) {
		ret = -ENOMEM;
		goto eclkdevalloc;
	}
	clkdev_add(siumckb_lookup);

	/* Port number used on this machine: port B */
	migor_snd_device = platform_device_alloc("soc-audio", 1);
	if (!migor_snd_device) {
		ret = -ENOMEM;
		goto epdevalloc;
	}

	platform_set_drvdata(migor_snd_device, &snd_soc_migor);

	ret = platform_device_add(migor_snd_device);
	if (ret)
		goto epdevadd;

	return 0;

epdevadd:
	platform_device_put(migor_snd_device);
epdevalloc:
	clkdev_drop(siumckb_lookup);
eclkdevalloc:
	clk_unregister(&siumckb_clk);
	return ret;
}

static void __exit migor_exit(void)
{
	clkdev_drop(siumckb_lookup);
	clk_unregister(&siumckb_clk);
	platform_device_unregister(migor_snd_device);
}

module_init(migor_init);
module_exit(migor_exit);

MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_DESCRIPTION("ALSA SoC Migor");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
9f5b64b7 GL	1	/*
	2	* ALSA SoC driver for Migo-R
	3	*
	4	* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/device.h>
	12	#include <linux/firmware.h>
	13	#include <linux/module.h>
	14
cbfa5184	15	#include <asm/clkdev.h>
9f5b64b7 GL	16	#include <asm/clock.h>
	17
	18	#include <cpu/sh7722.h>
	19
	20	#include <sound/core.h>
	21	#include <sound/pcm.h>
	22	#include <sound/soc.h>
	23	#include <sound/soc-dapm.h>
	24
	25	#include "../codecs/wm8978.h"
	26	#include "siu.h"
	27
	28	/* Default 8000Hz sampling frequency */
	29	static unsigned long codec_freq = 8000 * 512;
	30
	31	static unsigned int use_count;
	32
	33	/* External clock, sourced from the codec at the SIUMCKB pin */
	34	static unsigned long siumckb_recalc(struct clk *clk)
	35	{
	36	return codec_freq;
	37	}
	38
	39	static struct clk_ops siumckb_clk_ops = {
	40	.recalc = siumckb_recalc,
	41	};
	42
	43	static struct clk siumckb_clk = {
9f5b64b7 GL	44	.ops = &siumckb_clk_ops,
	45	.rate = 0, /* initialised at run-time */
	46	};
	47
cbfa5184 GL	48	static struct clk_lookup *siumckb_lookup;
cbfa5184 GL	49
9f5b64b7 GL	50	static int migor_hw_params(struct snd_pcm_substream *substream,
	51	struct snd_pcm_hw_params *params)
	52	{
	53	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	54	struct snd_soc_dai *codec_dai = rtd->codec_dai;
9f5b64b7 GL	55	int ret;
	56	unsigned int rate = params_rate(params);
	57
	58	ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000,
	59	SND_SOC_CLOCK_IN);
	60	if (ret < 0)
	61	return ret;
	62
9f5b64b7 GL	63	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);
	64	if (ret < 0)
	65	return ret;
	66
	67	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_NB_IF \|
	68	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS);
	69	if (ret < 0)
	70	return ret;
	71
f0fba2ad	72	ret = snd_soc_dai_set_fmt(rtd->cpu_dai, SND_SOC_DAIFMT_NB_IF \|
9f5b64b7 GL	73	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS);
	74	if (ret < 0)
	75	return ret;
	76
	77	codec_freq = rate * 512;
	78	/*
	79	* This propagates the parent frequency change to children and
	80	* recalculates the frequency table
	81	*/
	82	clk_set_rate(&siumckb_clk, codec_freq);
	83	dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq);
	84
f0fba2ad	85	ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, SIU_CLKB_EXT,
9f5b64b7 GL	86	codec_freq / 2, SND_SOC_CLOCK_IN);
	87
	88	if (!ret)
	89	use_count++;
	90
	91	return ret;
	92	}
	93
	94	static int migor_hw_free(struct snd_pcm_substream *substream)
	95	{
	96	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	97	struct snd_soc_dai *codec_dai = rtd->codec_dai;
9f5b64b7 GL	98
	99	if (use_count) {
	100	use_count--;
	101
	102	if (!use_count)
	103	snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0,
	104	SND_SOC_CLOCK_IN);
	105	} else {
	106	dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n");
	107	}
	108
	109	return 0;
	110	}
	111
	112	static struct snd_soc_ops migor_dai_ops = {
	113	.hw_params = migor_hw_params,
	114	.hw_free = migor_hw_free,
	115	};
	116
	117	static const struct snd_soc_dapm_widget migor_dapm_widgets[] = {
	118	SND_SOC_DAPM_HP("Headphone", NULL),
	119	SND_SOC_DAPM_MIC("Onboard Microphone", NULL),
	120	SND_SOC_DAPM_MIC("External Microphone", NULL),
	121	};
	122
	123	static const struct snd_soc_dapm_route audio_map[] = {
	124	/* Headphone output connected to LHP/RHP, enable OUT4 for VMID */
	125	{ "Headphone", NULL, "OUT4 VMID" },
	126	{ "OUT4 VMID", NULL, "LHP" },
	127	{ "OUT4 VMID", NULL, "RHP" },
	128
	129	/* On-board microphone */
	130	{ "RMICN", NULL, "Mic Bias" },
	131	{ "RMICP", NULL, "Mic Bias" },
	132	{ "Mic Bias", NULL, "Onboard Microphone" },
	133
	134	/* External microphone */
	135	{ "LMICN", NULL, "Mic Bias" },
	136	{ "LMICP", NULL, "Mic Bias" },
	137	{ "Mic Bias", NULL, "External Microphone" },
	138	};
	139
f0fba2ad	140	static int migor_dai_init(struct snd_soc_pcm_runtime *rtd)
9f5b64b7	141	{
f0fba2ad	142	struct snd_soc_codec *codec = rtd->codec;
ce6120cc	143	struct snd_soc_dapm_context *dapm = &codec->dapm;
f0fba2ad	144
ce6120cc	145	snd_soc_dapm_new_controls(dapm, migor_dapm_widgets,
9f5b64b7 GL	146	ARRAY_SIZE(migor_dapm_widgets));
9f5b64b7 GL	147
ce6120cc	148	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
9f5b64b7 GL	149
	150	return 0;
	151	}
	152
	153	/* migor digital audio interface glue - connects codec <--> CPU */
	154	static struct snd_soc_dai_link migor_dai = {
	155	.name = "wm8978",
	156	.stream_name = "WM8978",
f0fba2ad LG	157	.cpu_dai_name = "siu-i2s-dai",
	158	.codec_dai_name = "wm8978-hifi",
	159	.platform_name = "siu-pcm-audio",
5250a503	160	.codec_name = "wm8978.0-001a",
9f5b64b7 GL	161	.ops = &migor_dai_ops,
	162	.init = migor_dai_init,
	163	};
	164
	165	/* migor audio machine driver */
	166	static struct snd_soc_card snd_soc_migor = {
	167	.name = "Migo-R",
9f5b64b7 GL	168	.dai_link = &migor_dai,
	169	.num_links = 1,
	170	};
	171
9f5b64b7 GL	172	static struct platform_device *migor_snd_device;
	173
	174	static int __init migor_init(void)
	175	{
	176	int ret;
	177
	178	ret = clk_register(&siumckb_clk);
	179	if (ret < 0)
	180	return ret;
	181
cbfa5184 GL	182	siumckb_lookup = clkdev_alloc(&siumckb_clk, "siumckb_clk", NULL);
	183	if (!siumckb_lookup) {
	184	ret = -ENOMEM;
	185	goto eclkdevalloc;
	186	}
	187	clkdev_add(siumckb_lookup);
	188
9f5b64b7 GL	189	/* Port number used on this machine: port B */
	190	migor_snd_device = platform_device_alloc("soc-audio", 1);
	191	if (!migor_snd_device) {
	192	ret = -ENOMEM;
	193	goto epdevalloc;
	194	}
	195
f0fba2ad	196	platform_set_drvdata(migor_snd_device, &snd_soc_migor);
9f5b64b7 GL	197
	198	ret = platform_device_add(migor_snd_device);
	199	if (ret)
	200	goto epdevadd;
	201
	202	return 0;
	203
	204	epdevadd:
	205	platform_device_put(migor_snd_device);
	206	epdevalloc:
cbfa5184 GL	207	clkdev_drop(siumckb_lookup);
cbfa5184 GL	208	eclkdevalloc:
9f5b64b7 GL	209	clk_unregister(&siumckb_clk);
	210	return ret;
	211	}
	212
	213	static void __exit migor_exit(void)
	214	{
cbfa5184	215	clkdev_drop(siumckb_lookup);
9f5b64b7 GL	216	clk_unregister(&siumckb_clk);
	217	platform_device_unregister(migor_snd_device);
	218	}
	219
	220	module_init(migor_init);
	221	module_exit(migor_exit);
	222
	223	MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
	224	MODULE_DESCRIPTION("ALSA SoC Migor");
	225	MODULE_LICENSE("GPL v2");