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

#include <asm/clock.h>

#include <cpu/sh7722.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.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 sh_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;

	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" },
};

/* 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-pcm-audio",
	.codec_dai_name = "wm8978-hifi",
	.platform_name = "siu-pcm-audio",
	.codec_name = "wm8978.0-001a",
	.dai_fmt = SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_I2S |
		   SND_SOC_DAIFMT_CBS_CFS,
	.ops = &migor_dai_ops,
};

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

	.dapm_widgets = migor_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(migor_dapm_widgets),
	.dapm_routes = audio_map,
	.num_dapm_routes = ARRAY_SIZE(audio_map),
};

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

	/* 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
f4fd58d6	11	#include <linux/clkdev.h>
9f5b64b7 GL	12	#include <linux/device.h>
	13	#include <linux/firmware.h>
	14	#include <linux/module.h>
	15
	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>
9f5b64b7 GL	23
	24	#include "../codecs/wm8978.h"
	25	#include "siu.h"
	26
	27	/* Default 8000Hz sampling frequency */
	28	static unsigned long codec_freq = 8000 * 512;
	29
	30	static unsigned int use_count;
	31
	32	/* External clock, sourced from the codec at the SIUMCKB pin */
	33	static unsigned long siumckb_recalc(struct clk *clk)
	34	{
	35	return codec_freq;
	36	}
	37
c8587193	38	static struct sh_clk_ops siumckb_clk_ops = {
9f5b64b7 GL	39	.recalc = siumckb_recalc,
	40	};
	41
	42	static struct clk siumckb_clk = {
9f5b64b7 GL	43	.ops = &siumckb_clk_ops,
	44	.rate = 0, /* initialised at run-time */
	45	};
	46
cbfa5184 GL	47	static struct clk_lookup *siumckb_lookup;
cbfa5184 GL	48
9f5b64b7 GL	49	static int migor_hw_params(struct snd_pcm_substream *substream,
	50	struct snd_pcm_hw_params *params)
	51	{
	52	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	53	struct snd_soc_dai *codec_dai = rtd->codec_dai;
9f5b64b7 GL	54	int ret;
	55	unsigned int rate = params_rate(params);
	56
	57	ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000,
	58	SND_SOC_CLOCK_IN);
	59	if (ret < 0)
	60	return ret;
	61
9f5b64b7 GL	62	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);
	63	if (ret < 0)
	64	return ret;
	65
9f5b64b7 GL	66	codec_freq = rate * 512;
	67	/*
	68	* This propagates the parent frequency change to children and
	69	* recalculates the frequency table
	70	*/
	71	clk_set_rate(&siumckb_clk, codec_freq);
	72	dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq);
	73
f0fba2ad	74	ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, SIU_CLKB_EXT,
9f5b64b7 GL	75	codec_freq / 2, SND_SOC_CLOCK_IN);
	76
	77	if (!ret)
	78	use_count++;
	79
	80	return ret;
	81	}
	82
	83	static int migor_hw_free(struct snd_pcm_substream *substream)
	84	{
	85	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	86	struct snd_soc_dai *codec_dai = rtd->codec_dai;
9f5b64b7 GL	87
	88	if (use_count) {
	89	use_count--;
	90
	91	if (!use_count)
	92	snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0,
	93	SND_SOC_CLOCK_IN);
	94	} else {
	95	dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n");
	96	}
	97
	98	return 0;
	99	}
	100
	101	static struct snd_soc_ops migor_dai_ops = {
	102	.hw_params = migor_hw_params,
	103	.hw_free = migor_hw_free,
	104	};
	105
	106	static const struct snd_soc_dapm_widget migor_dapm_widgets[] = {
	107	SND_SOC_DAPM_HP("Headphone", NULL),
	108	SND_SOC_DAPM_MIC("Onboard Microphone", NULL),
	109	SND_SOC_DAPM_MIC("External Microphone", NULL),
	110	};
	111
	112	static const struct snd_soc_dapm_route audio_map[] = {
	113	/* Headphone output connected to LHP/RHP, enable OUT4 for VMID */
	114	{ "Headphone", NULL, "OUT4 VMID" },
	115	{ "OUT4 VMID", NULL, "LHP" },
	116	{ "OUT4 VMID", NULL, "RHP" },
	117
	118	/* On-board microphone */
	119	{ "RMICN", NULL, "Mic Bias" },
	120	{ "RMICP", NULL, "Mic Bias" },
	121	{ "Mic Bias", NULL, "Onboard Microphone" },
	122
	123	/* External microphone */
	124	{ "LMICN", NULL, "Mic Bias" },
	125	{ "LMICP", NULL, "Mic Bias" },
	126	{ "Mic Bias", NULL, "External Microphone" },
	127	};
	128
9f5b64b7 GL	129	/* migor digital audio interface glue - connects codec <--> CPU */
	130	static struct snd_soc_dai_link migor_dai = {
	131	.name = "wm8978",
	132	.stream_name = "WM8978",
0a09dfa0	133	.cpu_dai_name = "siu-pcm-audio",
f0fba2ad LG	134	.codec_dai_name = "wm8978-hifi",
f0fba2ad LG	135	.platform_name = "siu-pcm-audio",
5250a503	136	.codec_name = "wm8978.0-001a",
9cb2a25c LPC	137	.dai_fmt = SND_SOC_DAIFMT_NB_IF \| SND_SOC_DAIFMT_I2S \|
9cb2a25c LPC	138	SND_SOC_DAIFMT_CBS_CFS,
9f5b64b7	139	.ops = &migor_dai_ops,
9f5b64b7 GL	140	};
	141
	142	/* migor audio machine driver */
	143	static struct snd_soc_card snd_soc_migor = {
	144	.name = "Migo-R",
4a7042e5	145	.owner = THIS_MODULE,
9f5b64b7 GL	146	.dai_link = &migor_dai,
9f5b64b7 GL	147	.num_links = 1,
23a735cc LPC	148
	149	.dapm_widgets = migor_dapm_widgets,
	150	.num_dapm_widgets = ARRAY_SIZE(migor_dapm_widgets),
	151	.dapm_routes = audio_map,
	152	.num_dapm_routes = ARRAY_SIZE(audio_map),
9f5b64b7 GL	153	};
9f5b64b7 GL	154
9f5b64b7 GL	155	static struct platform_device *migor_snd_device;
	156
	157	static int __init migor_init(void)
	158	{
	159	int ret;
	160
	161	ret = clk_register(&siumckb_clk);
	162	if (ret < 0)
	163	return ret;
	164
d76a4476	165	siumckb_lookup = clkdev_create(&siumckb_clk, "siumckb_clk", NULL);
cbfa5184 GL	166	if (!siumckb_lookup) {
	167	ret = -ENOMEM;
	168	goto eclkdevalloc;
	169	}
cbfa5184	170
9f5b64b7 GL	171	/* Port number used on this machine: port B */
	172	migor_snd_device = platform_device_alloc("soc-audio", 1);
	173	if (!migor_snd_device) {
	174	ret = -ENOMEM;
	175	goto epdevalloc;
	176	}
	177
f0fba2ad	178	platform_set_drvdata(migor_snd_device, &snd_soc_migor);
9f5b64b7 GL	179
	180	ret = platform_device_add(migor_snd_device);
	181	if (ret)
	182	goto epdevadd;
	183
	184	return 0;
	185
	186	epdevadd:
	187	platform_device_put(migor_snd_device);
	188	epdevalloc:
cbfa5184 GL	189	clkdev_drop(siumckb_lookup);
cbfa5184 GL	190	eclkdevalloc:
9f5b64b7 GL	191	clk_unregister(&siumckb_clk);
	192	return ret;
	193	}
	194
	195	static void __exit migor_exit(void)
	196	{
cbfa5184	197	clkdev_drop(siumckb_lookup);
9f5b64b7 GL	198	clk_unregister(&siumckb_clk);
	199	platform_device_unregister(migor_snd_device);
	200	}
	201
	202	module_init(migor_init);
	203	module_exit(migor_exit);
	204
	205	MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
	206	MODULE_DESCRIPTION("ALSA SoC Migor");
	207	MODULE_LICENSE("GPL v2");