[deliverable/linux.git] / sound / soc / pxa / zylonite.c

/*
 * zylonite.c  --  SoC audio for Zylonite
 *
 * Copyright 2008 Wolfson Microelectronics PLC.
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "../codecs/wm9713.h"
#include "pxa2xx-ac97.h"
#include "pxa-ssp.h"

/*
 * There is a physical switch SW15 on the board which changes the MCLK
 * for the WM9713 between the standard AC97 master clock and the
 * output of the CLK_POUT signal from the PXA.
 */
static int clk_pout;
module_param(clk_pout, int, 0);
MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");

static struct clk *pout;

static struct snd_soc_card zylonite;

static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Microphone", NULL),
	SND_SOC_DAPM_MIC("Handset Microphone", NULL),
	SND_SOC_DAPM_SPK("Multiactor", NULL),
	SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
};

/* Currently supported audio map */
static const struct snd_soc_dapm_route audio_map[] = {

	/* Headphone output connected to HPL/HPR */
	{ "Headphone", NULL,  "HPL" },
	{ "Headphone", NULL,  "HPR" },

	/* On-board earpiece */
	{ "Headset Earpiece", NULL, "OUT3" },

	/* Headphone mic */
	{ "MIC2A", NULL, "Mic Bias" },
	{ "Mic Bias", NULL, "Headset Microphone" },

	/* On-board mic */
	{ "MIC1", NULL, "Mic Bias" },
	{ "Mic Bias", NULL, "Handset Microphone" },

	/* Multiactor differentially connected over SPKL/SPKR */
	{ "Multiactor", NULL, "SPKL" },
	{ "Multiactor", NULL, "SPKR" },
};

static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
{
	if (clk_pout)
		snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
				    clk_get_rate(pout), 0);

	return 0;
}

static int zylonite_voice_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;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	unsigned int pll_out = 0;
	unsigned int wm9713_div = 0;
	int ret = 0;
	int rate = params_rate(params);
	int width = snd_pcm_format_physical_width(params_format(params));

	/* Only support ratios that we can generate neatly from the AC97
	 * based master clock - in particular, this excludes 44.1kHz.
	 * In most applications the voice DAC will be used for telephony
	 * data so multiples of 8kHz will be the common case.
	 */
	switch (rate) {
	case 8000:
		wm9713_div = 12;
		break;
	case 16000:
		wm9713_div = 6;
		break;
	case 48000:
		wm9713_div = 2;
		break;
	default:
		/* Don't support OSS emulation */
		return -EINVAL;
	}

	/* Add 1 to the width for the leading clock cycle */
	pll_out = rate * (width + 1) * 8;

	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
	if (ret < 0)
		return ret;

	if (clk_pout)
		ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
					     WM9713_PCMDIV(wm9713_div));
	else
		ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
					     WM9713_PCMDIV(wm9713_div));
	if (ret < 0)
		return ret;

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

	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	return 0;
}

static struct snd_soc_ops zylonite_voice_ops = {
	.hw_params = zylonite_voice_hw_params,
};

static struct snd_soc_dai_link zylonite_dai[] = {
{
	.name = "AC97",
	.stream_name = "AC97 HiFi",
	.codec_name = "wm9713-codec",
	.platform_name = "pxa-pcm-audio",
	.cpu_dai_name = "pxa2xx-ac97",
	.codec_dai_name = "wm9713-hifi",
	.init = zylonite_wm9713_init,
},
{
	.name = "AC97 Aux",
	.stream_name = "AC97 Aux",
	.codec_name = "wm9713-codec",
	.platform_name = "pxa-pcm-audio",
	.cpu_dai_name = "pxa2xx-ac97-aux",
	.codec_dai_name = "wm9713-aux",
},
{
	.name = "WM9713 Voice",
	.stream_name = "WM9713 Voice",
	.codec_name = "wm9713-codec",
	.platform_name = "pxa-pcm-audio",
	.cpu_dai_name = "pxa-ssp-dai.2",
	.codec_dai_name = "wm9713-voice",
	.ops = &zylonite_voice_ops,
},
};

static int zylonite_probe(struct snd_soc_card *card)
{
	int ret;

	if (clk_pout) {
		pout = clk_get(NULL, "CLK_POUT");
		if (IS_ERR(pout)) {
			dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
				PTR_ERR(pout));
			return PTR_ERR(pout);
		}

		ret = clk_enable(pout);
		if (ret != 0) {
			dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
				ret);
			clk_put(pout);
			return ret;
		}

		dev_dbg(card->dev, "MCLK enabled at %luHz\n",
			clk_get_rate(pout));
	}

	return 0;
}

static int zylonite_remove(struct snd_soc_card *card)
{
	if (clk_pout) {
		clk_disable(pout);
		clk_put(pout);
	}

	return 0;
}

static int zylonite_suspend_post(struct snd_soc_card *card)
{
	if (clk_pout)
		clk_disable(pout);

	return 0;
}

static int zylonite_resume_pre(struct snd_soc_card *card)
{
	int ret = 0;

	if (clk_pout) {
		ret = clk_enable(pout);
		if (ret != 0)
			dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
				ret);
	}

	return ret;
}

static struct snd_soc_card zylonite = {
	.name = "Zylonite",
	.owner = THIS_MODULE,
	.probe = &zylonite_probe,
	.remove = &zylonite_remove,
	.suspend_post = &zylonite_suspend_post,
	.resume_pre = &zylonite_resume_pre,
	.dai_link = zylonite_dai,
	.num_links = ARRAY_SIZE(zylonite_dai),

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

static struct platform_device *zylonite_snd_ac97_device;

static int __init zylonite_init(void)
{
	int ret;

	zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
	if (!zylonite_snd_ac97_device)
		return -ENOMEM;

	platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);

	ret = platform_device_add(zylonite_snd_ac97_device);
	if (ret != 0)
		platform_device_put(zylonite_snd_ac97_device);

	return ret;
}

static void __exit zylonite_exit(void)
{
	platform_device_unregister(zylonite_snd_ac97_device);
}

module_init(zylonite_init);
module_exit(zylonite_exit);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
MODULE_LICENSE("GPL");
Commit	Line	Data
2dac9217 MB	1	/*
	2	* zylonite.c -- SoC audio for Zylonite
	3	*
	4	* Copyright 2008 Wolfson Microelectronics PLC.
	5	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 of the
	10	* License, or (at your option) any later version.
	11	*
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/device.h>
2c782f59	17	#include <linux/clk.h>
2dac9217 MB	18	#include <linux/i2c.h>
	19	#include <sound/core.h>
	20	#include <sound/pcm.h>
	21	#include <sound/pcm_params.h>
	22	#include <sound/soc.h>
2dac9217 MB	23
2dac9217 MB	24	#include "../codecs/wm9713.h"
2dac9217 MB	25	#include "pxa2xx-ac97.h"
	26	#include "pxa-ssp.h"
	27
2c782f59 MB	28	/*
	29	* There is a physical switch SW15 on the board which changes the MCLK
	30	* for the WM9713 between the standard AC97 master clock and the
	31	* output of the CLK_POUT signal from the PXA.
	32	*/
	33	static int clk_pout;
	34	module_param(clk_pout, int, 0);
	35	MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
	36
	37	static struct clk *pout;
	38
2dac9217 MB	39	static struct snd_soc_card zylonite;
	40
	41	static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
	42	SND_SOC_DAPM_HP("Headphone", NULL),
	43	SND_SOC_DAPM_MIC("Headset Microphone", NULL),
	44	SND_SOC_DAPM_MIC("Handset Microphone", NULL),
	45	SND_SOC_DAPM_SPK("Multiactor", NULL),
	46	SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
	47	};
	48
	49	/* Currently supported audio map */
	50	static const struct snd_soc_dapm_route audio_map[] = {
	51
	52	/* Headphone output connected to HPL/HPR */
	53	{ "Headphone", NULL, "HPL" },
	54	{ "Headphone", NULL, "HPR" },
	55
	56	/* On-board earpiece */
	57	{ "Headset Earpiece", NULL, "OUT3" },
	58
	59	/* Headphone mic */
	60	{ "MIC2A", NULL, "Mic Bias" },
	61	{ "Mic Bias", NULL, "Headset Microphone" },
	62
	63	/* On-board mic */
	64	{ "MIC1", NULL, "Mic Bias" },
	65	{ "Mic Bias", NULL, "Handset Microphone" },
	66
	67	/* Multiactor differentially connected over SPKL/SPKR */
	68	{ "Multiactor", NULL, "SPKL" },
	69	{ "Multiactor", NULL, "SPKR" },
	70	};
	71
f0fba2ad	72	static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
2dac9217	73	{
2c782f59	74	if (clk_pout)
f0fba2ad	75	snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
85488037	76	clk_get_rate(pout), 0);
2dac9217	77
2dac9217 MB	78	return 0;
	79	}
	80
	81	static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
	82	struct snd_pcm_hw_params *params)
	83	{
	84	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad LG	85	struct snd_soc_dai *codec_dai = rtd->codec_dai;
f0fba2ad LG	86	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
a435869c	87	unsigned int pll_out = 0;
2dac9217 MB	88	unsigned int wm9713_div = 0;
2dac9217 MB	89	int ret = 0;
85fab780 MB	90	int rate = params_rate(params);
	91	int width = snd_pcm_format_physical_width(params_format(params));
	92
	93	/* Only support ratios that we can generate neatly from the AC97
	94	* based master clock - in particular, this excludes 44.1kHz.
	95	* In most applications the voice DAC will be used for telephony
	96	* data so multiples of 8kHz will be the common case.
	97	*/
	98	switch (rate) {
2dac9217 MB	99	case 8000:
2dac9217 MB	100	wm9713_div = 12;
2dac9217 MB	101	break;
	102	case 16000:
	103	wm9713_div = 6;
2dac9217 MB	104	break;
2dac9217 MB	105	case 48000:
2dac9217	106	wm9713_div = 2;
2dac9217	107	break;
85fab780 MB	108	default:
	109	/* Don't support OSS emulation */
	110	return -EINVAL;
2dac9217 MB	111	}
2dac9217 MB	112
85fab780 MB	113	/* Add 1 to the width for the leading clock cycle */
85fab780 MB	114	pll_out = rate * (width + 1) * 8;
2dac9217	115
85fab780	116	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
2dac9217 MB	117	if (ret < 0)
	118	return ret;
	119
85488037	120	ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
a435869c MB	121	if (ret < 0)
	122	return ret;
	123
2c782f59 MB	124	if (clk_pout)
	125	ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
	126	WM9713_PCMDIV(wm9713_div));
	127	else
	128	ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
	129	WM9713_PCMDIV(wm9713_div));
2dac9217 MB	130	if (ret < 0)
	131	return ret;
	132
85fab780 MB	133	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S \|
	134	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
	135	if (ret < 0)
	136	return ret;
	137
	138	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
	139	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
	140	if (ret < 0)
	141	return ret;
	142
2dac9217 MB	143	return 0;
	144	}
	145
	146	static struct snd_soc_ops zylonite_voice_ops = {
	147	.hw_params = zylonite_voice_hw_params,
	148	};
	149
	150	static struct snd_soc_dai_link zylonite_dai[] = {
	151	{
	152	.name = "AC97",
	153	.stream_name = "AC97 HiFi",
f0fba2ad LG	154	.codec_name = "wm9713-codec",
f0fba2ad LG	155	.platform_name = "pxa-pcm-audio",
4bfc4e25	156	.cpu_dai_name = "pxa2xx-ac97",
efd69479	157	.codec_dai_name = "wm9713-hifi",
2dac9217 MB	158	.init = zylonite_wm9713_init,
	159	},
	160	{
	161	.name = "AC97 Aux",
	162	.stream_name = "AC97 Aux",
f0fba2ad LG	163	.codec_name = "wm9713-codec",
f0fba2ad LG	164	.platform_name = "pxa-pcm-audio",
4bfc4e25	165	.cpu_dai_name = "pxa2xx-ac97-aux",
efd69479	166	.codec_dai_name = "wm9713-aux",
2dac9217 MB	167	},
	168	{
	169	.name = "WM9713 Voice",
	170	.stream_name = "WM9713 Voice",
f0fba2ad LG	171	.codec_name = "wm9713-codec",
	172	.platform_name = "pxa-pcm-audio",
	173	.cpu_dai_name = "pxa-ssp-dai.2",
efd69479	174	.codec_dai_name = "wm9713-voice",
2dac9217 MB	175	.ops = &zylonite_voice_ops,
	176	},
	177	};
	178
e7361ec4	179	static int zylonite_probe(struct snd_soc_card *card)
2c782f59 MB	180	{
	181	int ret;
	182
	183	if (clk_pout) {
	184	pout = clk_get(NULL, "CLK_POUT");
	185	if (IS_ERR(pout)) {
eff919ac	186	dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
2c782f59 MB	187	PTR_ERR(pout));
	188	return PTR_ERR(pout);
	189	}
	190
	191	ret = clk_enable(pout);
	192	if (ret != 0) {
eff919ac	193	dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
2c782f59 MB	194	ret);
	195	clk_put(pout);
	196	return ret;
	197	}
	198
eff919ac	199	dev_dbg(card->dev, "MCLK enabled at %luHz\n",
2c782f59 MB	200	clk_get_rate(pout));
	201	}
	202
	203	return 0;
	204	}
	205
e7361ec4	206	static int zylonite_remove(struct snd_soc_card *card)
2c782f59 MB	207	{
	208	if (clk_pout) {
	209	clk_disable(pout);
	210	clk_put(pout);
	211	}
	212
	213	return 0;
	214	}
	215
70b2ac12	216	static int zylonite_suspend_post(struct snd_soc_card *card)
2c782f59 MB	217	{
	218	if (clk_pout)
	219	clk_disable(pout);
	220
	221	return 0;
	222	}
	223
70b2ac12	224	static int zylonite_resume_pre(struct snd_soc_card *card)
2c782f59 MB	225	{
	226	int ret = 0;
	227
	228	if (clk_pout) {
	229	ret = clk_enable(pout);
	230	if (ret != 0)
eff919ac	231	dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
2c782f59 MB	232	ret);
	233	}
	234
	235	return ret;
	236	}
	237
2dac9217 MB	238	static struct snd_soc_card zylonite = {
2dac9217 MB	239	.name = "Zylonite",
561c6a17	240	.owner = THIS_MODULE,
2c782f59 MB	241	.probe = &zylonite_probe,
	242	.remove = &zylonite_remove,
	243	.suspend_post = &zylonite_suspend_post,
	244	.resume_pre = &zylonite_resume_pre,
2dac9217 MB	245	.dai_link = zylonite_dai,
2dac9217 MB	246	.num_links = ARRAY_SIZE(zylonite_dai),
a9576cbb LPC	247
	248	.dapm_widgets = zylonite_dapm_widgets,
	249	.num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets),
	250	.dapm_routes = audio_map,
	251	.num_dapm_routes = ARRAY_SIZE(audio_map),
2dac9217 MB	252	};
	253
	254	static struct platform_device *zylonite_snd_ac97_device;
	255
	256	static int __init zylonite_init(void)
	257	{
	258	int ret;
	259
	260	zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
	261	if (!zylonite_snd_ac97_device)
	262	return -ENOMEM;
	263
f0fba2ad	264	platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
2dac9217 MB	265
	266	ret = platform_device_add(zylonite_snd_ac97_device);
	267	if (ret != 0)
	268	platform_device_put(zylonite_snd_ac97_device);
	269
	270	return ret;
	271	}
	272
	273	static void __exit zylonite_exit(void)
	274	{
	275	platform_device_unregister(zylonite_snd_ac97_device);
	276	}
	277
	278	module_init(zylonite_init);
	279	module_exit(zylonite_exit);
	280
	281	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	282	MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
	283	MODULE_LICENSE("GPL");