[deliverable/linux.git] / sound / soc / samsung / neo1973_gta02_wm8753.c

/*
 * neo1973_gta02_wm8753.c  --  SoC audio for Openmoko Freerunner(GTA02)
 *
 * Copyright 2007 Openmoko Inc
 * Author: Graeme Gregory <graeme@openmoko.org>
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory <linux@wolfsonmicro.com>
 * Copyright 2009 Wolfson Microelectronics
 *
 *  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/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <asm/mach-types.h>

#include <plat/regs-iis.h>

#include <mach/regs-clock.h>
#include <asm/io.h>
#include <mach/gta02.h>
#include "../codecs/wm8753.h"
#include "dma.h"
#include "s3c24xx-i2s.h"

static struct snd_soc_card neo1973_gta02;

static int neo1973_gta02_hifi_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, bclk = 0;
	int ret = 0;
	unsigned long iis_clkrate;

	iis_clkrate = s3c24xx_i2s_get_clockrate();

	switch (params_rate(params)) {
	case 8000:
	case 16000:
		pll_out = 12288000;
		break;
	case 48000:
		bclk = WM8753_BCLK_DIV_4;
		pll_out = 12288000;
		break;
	case 96000:
		bclk = WM8753_BCLK_DIV_2;
		pll_out = 12288000;
		break;
	case 11025:
		bclk = WM8753_BCLK_DIV_16;
		pll_out = 11289600;
		break;
	case 22050:
		bclk = WM8753_BCLK_DIV_8;
		pll_out = 11289600;
		break;
	case 44100:
		bclk = WM8753_BCLK_DIV_4;
		pll_out = 11289600;
		break;
	case 88200:
		bclk = WM8753_BCLK_DIV_2;
		pll_out = 11289600;
		break;
	}

	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai,
		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai,
		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
		SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	/* set MCLK division for sample rate */
	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
		S3C2410_IISMOD_32FS);
	if (ret < 0)
		return ret;

	/* set codec BCLK division for sample rate */
	ret = snd_soc_dai_set_clkdiv(codec_dai,
					WM8753_BCLKDIV, bclk);
	if (ret < 0)
		return ret;

	/* set prescaler division for sample rate */
	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
		S3C24XX_PRESCALE(4, 4));
	if (ret < 0)
		return ret;

	/* codec PLL input is PCLK/4 */
	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
		iis_clkrate / 4, pll_out);
	if (ret < 0)
		return ret;

	return 0;
}

static int neo1973_gta02_hifi_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;

	/* disable the PLL */
	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
}

/*
 * Neo1973 WM8753 HiFi DAI opserations.
 */
static struct snd_soc_ops neo1973_gta02_hifi_ops = {
	.hw_params = neo1973_gta02_hifi_hw_params,
	.hw_free = neo1973_gta02_hifi_hw_free,
};

static int neo1973_gta02_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;
	unsigned int pcmdiv = 0;
	int ret = 0;
	unsigned long iis_clkrate;

	iis_clkrate = s3c24xx_i2s_get_clockrate();

	if (params_rate(params) != 8000)
		return -EINVAL;
	if (params_channels(params) != 1)
		return -EINVAL;

	pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */

	/* todo: gg check mode (DSP_B) against CSR datasheet */
	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
		12288000, SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	/* set codec PCM division for sample rate */
	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
					pcmdiv);
	if (ret < 0)
		return ret;

	/* configure and enable PLL for 12.288MHz output */
	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
		iis_clkrate / 4, 12288000);
	if (ret < 0)
		return ret;

	return 0;
}

static int neo1973_gta02_voice_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;

	/* disable the PLL */
	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
}

static struct snd_soc_ops neo1973_gta02_voice_ops = {
	.hw_params = neo1973_gta02_voice_hw_params,
	.hw_free = neo1973_gta02_voice_hw_free,
};

#define LM4853_AMP 1
#define LM4853_SPK 2

static u8 lm4853_state;

/* This has no effect, it exists only to maintain compatibility with
 * existing ALSA state files.
 */
static int lm4853_set_state(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	int val = ucontrol->value.integer.value[0];

	if (val)
		lm4853_state |= LM4853_AMP;
	else
		lm4853_state &= ~LM4853_AMP;

	return 0;
}

static int lm4853_get_state(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;

	return 0;
}

static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	int val = ucontrol->value.integer.value[0];

	if (val) {
		lm4853_state |= LM4853_SPK;
		gpio_set_value(GTA02_GPIO_HP_IN, 0);
	} else {
		lm4853_state &= ~LM4853_SPK;
		gpio_set_value(GTA02_GPIO_HP_IN, 1);
	}

	return 0;
}

static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;

	return 0;
}

static int lm4853_event(struct snd_soc_dapm_widget *w,
			struct snd_kcontrol *k,
			int event)
{
	gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(event));

	return 0;
}

static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
	SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
	SND_SOC_DAPM_LINE("GSM Line Out", NULL),
	SND_SOC_DAPM_LINE("GSM Line In", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Handset Mic", NULL),
	SND_SOC_DAPM_SPK("Handset Spk", NULL),
};


/* example machine audio_mapnections */
static const struct snd_soc_dapm_route audio_map[] = {

	/* Connections to the lm4853 amp */
	{"Stereo Out", NULL, "LOUT1"},
	{"Stereo Out", NULL, "ROUT1"},

	/* Connections to the GSM Module */
	{"GSM Line Out", NULL, "MONO1"},
	{"GSM Line Out", NULL, "MONO2"},
	{"RXP", NULL, "GSM Line In"},
	{"RXN", NULL, "GSM Line In"},

	/* Connections to Headset */
	{"MIC1", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Headset Mic"},

	/* Call Mic */
	{"MIC2", NULL, "Mic Bias"},
	{"MIC2N", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Handset Mic"},

	/* Call Speaker */
	{"Handset Spk", NULL, "LOUT2"},
	{"Handset Spk", NULL, "ROUT2"},

	/* Connect the ALC pins */
	{"ACIN", NULL, "ACOP"},
};

static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
	SOC_DAPM_PIN_SWITCH("Stereo Out"),
	SOC_DAPM_PIN_SWITCH("GSM Line Out"),
	SOC_DAPM_PIN_SWITCH("GSM Line In"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Handset Mic"),
	SOC_DAPM_PIN_SWITCH("Handset Spk"),

	/* This has no effect, it exists only to maintain compatibility with
	 * existing ALSA state files.
	 */
	SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
		lm4853_get_state,
		lm4853_set_state),
	SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
		lm4853_get_spk,
		lm4853_set_spk),
};

/*
 * This is an example machine initialisation for a wm8753 connected to a
 * neo1973 GTA02.
 */
static int neo1973_gta02_wm8753_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	int err;

	/* set up NC codec pins */
	snd_soc_dapm_nc_pin(dapm, "OUT3");
	snd_soc_dapm_nc_pin(dapm, "OUT4");
	snd_soc_dapm_nc_pin(dapm, "LINE1");
	snd_soc_dapm_nc_pin(dapm, "LINE2");

	/* Add neo1973 gta02 specific widgets */
	snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
				  ARRAY_SIZE(wm8753_dapm_widgets));

	/* add neo1973 gta02 specific controls */
	err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
		ARRAY_SIZE(wm8753_neo1973_gta02_controls));

	if (err < 0)
		return err;

	/* set up neo1973 gta02 specific audio path audio_map */
	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

	/* set endpoints to default off mode */
	snd_soc_dapm_disable_pin(dapm, "Stereo Out");
	snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
	snd_soc_dapm_disable_pin(dapm, "GSM Line In");
	snd_soc_dapm_disable_pin(dapm, "Headset Mic");
	snd_soc_dapm_disable_pin(dapm, "Handset Mic");
	snd_soc_dapm_disable_pin(dapm, "Handset Spk");

	/* allow audio paths from the GSM modem to run during suspend */
	snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");
	snd_soc_dapm_ignore_suspend(dapm, "GSM Line Out");
	snd_soc_dapm_ignore_suspend(dapm, "GSM Line In");
	snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
	snd_soc_dapm_ignore_suspend(dapm, "Handset Mic");
	snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");

	snd_soc_dapm_sync(dapm);

	return 0;
}

/*
 * BT Codec DAI
 */
static struct snd_soc_dai_driver bt_dai = {
	.name = "bluetooth-dai",
	.playback = {
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
};

static struct snd_soc_dai_link neo1973_gta02_dai[] = {
{ /* Hifi Playback - for similatious use with voice below */
	.name = "WM8753",
	.stream_name = "WM8753 HiFi",
	.cpu_dai_name = "s3c24xx-i2s",
	.codec_dai_name = "wm8753-hifi",
	.init = neo1973_gta02_wm8753_init,
	.platform_name = "samsung-audio",
	.codec_name = "wm8753-codec.0-0x1a",
	.ops = &neo1973_gta02_hifi_ops,
},
{ /* Voice via BT */
	.name = "Bluetooth",
	.stream_name = "Voice",
	.cpu_dai_name = "bluetooth-dai",
	.codec_dai_name = "wm8753-voice",
	.ops = &neo1973_gta02_voice_ops,
	.codec_name = "wm8753-codec.0-0x1a",
	.platform_name = "samsung-audio",
},
};

static struct snd_soc_card neo1973_gta02 = {
	.name = "neo1973-gta02",
	.dai_link = neo1973_gta02_dai,
	.num_links = ARRAY_SIZE(neo1973_gta02_dai),
};

static struct platform_device *neo1973_gta02_snd_device;

static int __init neo1973_gta02_init(void)
{
	int ret;

	if (!machine_is_neo1973_gta02()) {
		printk(KERN_INFO
		       "Only GTA02 is supported by this ASoC driver\n");
		return -ENODEV;
	}

	neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
	if (!neo1973_gta02_snd_device)
		return -ENOMEM;

	/* register bluetooth DAI here */
	ret = snd_soc_register_dai(&neo1973_gta02_snd_device->dev, &bt_dai);
	if (ret)
		goto err_put_device;

	platform_set_drvdata(neo1973_gta02_snd_device, &neo1973_gta02);
	ret = platform_device_add(neo1973_gta02_snd_device);

	if (ret)
		goto err_unregister_dai;

	/* Initialise GPIOs used by amp */
	ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
	if (ret) {
		pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
		goto err_del_device;
	}

	ret = gpio_direction_output(GTA02_GPIO_HP_IN, 1);
	if (ret) {
		pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
		goto err_free_gpio_hp_in;
	}

	ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
	if (ret) {
		pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
		goto err_free_gpio_hp_in;
	}

	ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
	if (ret) {
		pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
		goto err_free_gpio_amp_shut;
	}

	return 0;

err_free_gpio_amp_shut:
	gpio_free(GTA02_GPIO_AMP_SHUT);
err_free_gpio_hp_in:
	gpio_free(GTA02_GPIO_HP_IN);
err_del_device:
	platform_device_del(neo1973_gta02_snd_device);
err_unregister_dai:
	snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
err_put_device:
	platform_device_put(neo1973_gta02_snd_device);
	return ret;
}
module_init(neo1973_gta02_init);

static void __exit neo1973_gta02_exit(void)
{
	snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
	platform_device_unregister(neo1973_gta02_snd_device);
	gpio_free(GTA02_GPIO_HP_IN);
	gpio_free(GTA02_GPIO_AMP_SHUT);
}
module_exit(neo1973_gta02_exit);

/* Module information */
MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
MODULE_LICENSE("GPL");
Commit	Line	Data
606689e9	1	/*
82c4362e	2	* neo1973_gta02_wm8753.c -- SoC audio for Openmoko Freerunner(GTA02)
606689e9 MB	3	*
	4	* Copyright 2007 Openmoko Inc
	5	* Author: Graeme Gregory <graeme@openmoko.org>
	6	* Copyright 2007 Wolfson Microelectronics PLC.
	7	* Author: Graeme Gregory <linux@wolfsonmicro.com>
	8	* Copyright 2009 Wolfson Microelectronics
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/moduleparam.h>
	18	#include <linux/timer.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/platform_device.h>
82c4362e	21	#include <linux/gpio.h>
606689e9 MB	22	#include <sound/core.h>
	23	#include <sound/pcm.h>
	24	#include <sound/soc.h>
606689e9 MB	25
	26	#include <asm/mach-types.h>
	27
	28	#include <plat/regs-iis.h>
	29
	30	#include <mach/regs-clock.h>
606689e9	31	#include <asm/io.h>
606689e9 MB	32	#include <mach/gta02.h>
606689e9 MB	33	#include "../codecs/wm8753.h"
4b640cf3	34	#include "dma.h"
606689e9 MB	35	#include "s3c24xx-i2s.h"
	36
	37	static struct snd_soc_card neo1973_gta02;
	38
	39	static int neo1973_gta02_hifi_hw_params(struct snd_pcm_substream *substream,
	40	struct snd_pcm_hw_params *params)
	41	{
	42	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad LG	43	struct snd_soc_dai *codec_dai = rtd->codec_dai;
f0fba2ad LG	44	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
606689e9 MB	45	unsigned int pll_out = 0, bclk = 0;
	46	int ret = 0;
	47	unsigned long iis_clkrate;
	48
	49	iis_clkrate = s3c24xx_i2s_get_clockrate();
	50
	51	switch (params_rate(params)) {
	52	case 8000:
	53	case 16000:
	54	pll_out = 12288000;
	55	break;
	56	case 48000:
	57	bclk = WM8753_BCLK_DIV_4;
	58	pll_out = 12288000;
	59	break;
	60	case 96000:
	61	bclk = WM8753_BCLK_DIV_2;
	62	pll_out = 12288000;
	63	break;
	64	case 11025:
	65	bclk = WM8753_BCLK_DIV_16;
	66	pll_out = 11289600;
	67	break;
	68	case 22050:
	69	bclk = WM8753_BCLK_DIV_8;
	70	pll_out = 11289600;
	71	break;
	72	case 44100:
	73	bclk = WM8753_BCLK_DIV_4;
	74	pll_out = 11289600;
	75	break;
	76	case 88200:
	77	bclk = WM8753_BCLK_DIV_2;
	78	pll_out = 11289600;
	79	break;
	80	}
	81
	82	/* set codec DAI configuration */
	83	ret = snd_soc_dai_set_fmt(codec_dai,
	84	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF \|
	85	SND_SOC_DAIFMT_CBM_CFM);
	86	if (ret < 0)
	87	return ret;
	88
	89	/* set cpu DAI configuration */
	90	ret = snd_soc_dai_set_fmt(cpu_dai,
	91	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF \|
	92	SND_SOC_DAIFMT_CBM_CFM);
	93	if (ret < 0)
	94	return ret;
	95
	96	/* set the codec system clock for DAC and ADC */
	97	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
	98	SND_SOC_CLOCK_IN);
	99	if (ret < 0)
	100	return ret;
	101
	102	/* set MCLK division for sample rate */
	103	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
	104	S3C2410_IISMOD_32FS);
	105	if (ret < 0)
	106	return ret;
	107
	108	/* set codec BCLK division for sample rate */
109	ret = snd_soc_dai_set_clkdiv(codec_dai,
110	WM8753_BCLKDIV, bclk);
111	if (ret < 0)
112	return ret;
113
114	/* set prescaler division for sample rate */
115	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
116	S3C24XX_PRESCALE(4, 4));
117	if (ret < 0)
118	return ret;
119
120	/* codec PLL input is PCLK/4 */
85488037	121	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
606689e9 MB	122	iis_clkrate / 4, pll_out);
	123	if (ret < 0)
	124	return ret;
	125
	126	return 0;
	127	}
	128
	129	static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
	130	{
	131	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	132	struct snd_soc_dai *codec_dai = rtd->codec_dai;
606689e9 MB	133
606689e9 MB	134	/* disable the PLL */
140318aa	135	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
606689e9 MB	136	}
	137
	138	/*
	139	* Neo1973 WM8753 HiFi DAI opserations.
	140	*/
	141	static struct snd_soc_ops neo1973_gta02_hifi_ops = {
	142	.hw_params = neo1973_gta02_hifi_hw_params,
	143	.hw_free = neo1973_gta02_hifi_hw_free,
	144	};
	145
	146	static int neo1973_gta02_voice_hw_params(
	147	struct snd_pcm_substream *substream,
	148	struct snd_pcm_hw_params *params)
	149	{
	150	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	151	struct snd_soc_dai *codec_dai = rtd->codec_dai;
606689e9 MB	152	unsigned int pcmdiv = 0;
	153	int ret = 0;
	154	unsigned long iis_clkrate;
	155
	156	iis_clkrate = s3c24xx_i2s_get_clockrate();
	157
	158	if (params_rate(params) != 8000)
	159	return -EINVAL;
	160	if (params_channels(params) != 1)
	161	return -EINVAL;
	162
	163	pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
	164
	165	/* todo: gg check mode (DSP_B) against CSR datasheet */
	166	/* set codec DAI configuration */
	167	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B \|
	168	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
	169	if (ret < 0)
	170	return ret;
	171
	172	/* set the codec system clock for DAC and ADC */
	173	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
	174	12288000, SND_SOC_CLOCK_IN);
	175	if (ret < 0)
	176	return ret;
	177
	178	/* set codec PCM division for sample rate */
	179	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
	180	pcmdiv);
	181	if (ret < 0)
	182	return ret;
	183
fa2eb005	184	/* configure and enable PLL for 12.288MHz output */
140318aa	185	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
606689e9 MB	186	iis_clkrate / 4, 12288000);
	187	if (ret < 0)
	188	return ret;
	189
	190	return 0;
	191	}
	192
	193	static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
	194	{
	195	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	196	struct snd_soc_dai *codec_dai = rtd->codec_dai;
606689e9 MB	197
606689e9 MB	198	/* disable the PLL */
140318aa	199	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
606689e9 MB	200	}
	201
	202	static struct snd_soc_ops neo1973_gta02_voice_ops = {
	203	.hw_params = neo1973_gta02_voice_hw_params,
	204	.hw_free = neo1973_gta02_voice_hw_free,
	205	};
	206
	207	#define LM4853_AMP 1
	208	#define LM4853_SPK 2
	209
	210	static u8 lm4853_state;
	211
	212	/* This has no effect, it exists only to maintain compatibility with
	213	* existing ALSA state files.
	214	*/
	215	static int lm4853_set_state(struct snd_kcontrol *kcontrol,
	216	struct snd_ctl_elem_value *ucontrol)
	217	{
	218	int val = ucontrol->value.integer.value[0];
	219
	220	if (val)
	221	lm4853_state \|= LM4853_AMP;
	222	else
	223	lm4853_state &= ~LM4853_AMP;
	224
	225	return 0;
	226	}
	227
	228	static int lm4853_get_state(struct snd_kcontrol *kcontrol,
	229	struct snd_ctl_elem_value *ucontrol)
	230	{
	231	ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;
	232
	233	return 0;
	234	}
	235
	236	static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
	237	struct snd_ctl_elem_value *ucontrol)
	238	{
	239	int val = ucontrol->value.integer.value[0];
	240
	241	if (val) {
	242	lm4853_state \|= LM4853_SPK;
82c4362e	243	gpio_set_value(GTA02_GPIO_HP_IN, 0);
606689e9 MB	244	} else {
606689e9 MB	245	lm4853_state &= ~LM4853_SPK;
82c4362e	246	gpio_set_value(GTA02_GPIO_HP_IN, 1);
606689e9 MB	247	}
	248
	249	return 0;
	250	}
	251
	252	static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
	253	struct snd_ctl_elem_value *ucontrol)
	254	{
	255	ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;
	256
	257	return 0;
	258	}
	259
	260	static int lm4853_event(struct snd_soc_dapm_widget *w,
	261	struct snd_kcontrol *k,
	262	int event)
	263	{
f0fba2ad	264	gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(event));
606689e9 MB	265
	266	return 0;
	267	}
	268
	269	static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
	270	SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
	271	SND_SOC_DAPM_LINE("GSM Line Out", NULL),
	272	SND_SOC_DAPM_LINE("GSM Line In", NULL),
	273	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	274	SND_SOC_DAPM_MIC("Handset Mic", NULL),
	275	SND_SOC_DAPM_SPK("Handset Spk", NULL),
	276	};
	277
	278
	279	/* example machine audio_mapnections */
	280	static const struct snd_soc_dapm_route audio_map[] = {
	281
	282	/* Connections to the lm4853 amp */
	283	{"Stereo Out", NULL, "LOUT1"},
	284	{"Stereo Out", NULL, "ROUT1"},
	285
	286	/* Connections to the GSM Module */
	287	{"GSM Line Out", NULL, "MONO1"},
	288	{"GSM Line Out", NULL, "MONO2"},
	289	{"RXP", NULL, "GSM Line In"},
	290	{"RXN", NULL, "GSM Line In"},
	291
	292	/* Connections to Headset */
	293	{"MIC1", NULL, "Mic Bias"},
	294	{"Mic Bias", NULL, "Headset Mic"},
	295
	296	/* Call Mic */
	297	{"MIC2", NULL, "Mic Bias"},
	298	{"MIC2N", NULL, "Mic Bias"},
	299	{"Mic Bias", NULL, "Handset Mic"},
	300
	301	/* Call Speaker */
	302	{"Handset Spk", NULL, "LOUT2"},
	303	{"Handset Spk", NULL, "ROUT2"},
	304
	305	/* Connect the ALC pins */
	306	{"ACIN", NULL, "ACOP"},
	307	};
	308
	309	static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
	310	SOC_DAPM_PIN_SWITCH("Stereo Out"),
	311	SOC_DAPM_PIN_SWITCH("GSM Line Out"),
	312	SOC_DAPM_PIN_SWITCH("GSM Line In"),
	313	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	314	SOC_DAPM_PIN_SWITCH("Handset Mic"),
	315	SOC_DAPM_PIN_SWITCH("Handset Spk"),
	316
	317	/* This has no effect, it exists only to maintain compatibility with
	318	* existing ALSA state files.
	319	*/
	320	SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
	321	lm4853_get_state,
	322	lm4853_set_state),
	323	SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
	324	lm4853_get_spk,
	325	lm4853_set_spk),
	326	};
	327
	328	/*
329	* This is an example machine initialisation for a wm8753 connected to a
330	* neo1973 GTA02.
331	*/
f0fba2ad	332	static int neo1973_gta02_wm8753_init(struct snd_soc_pcm_runtime *rtd)
606689e9	333	{
f0fba2ad	334	struct snd_soc_codec *codec = rtd->codec;
ce6120cc	335	struct snd_soc_dapm_context *dapm = &codec->dapm;
69331fbd	336	int err;
606689e9 MB	337
606689e9 MB	338	/* set up NC codec pins */
ce6120cc LG	339	snd_soc_dapm_nc_pin(dapm, "OUT3");
	340	snd_soc_dapm_nc_pin(dapm, "OUT4");
	341	snd_soc_dapm_nc_pin(dapm, "LINE1");
	342	snd_soc_dapm_nc_pin(dapm, "LINE2");
606689e9 MB	343
606689e9 MB	344	/* Add neo1973 gta02 specific widgets */
ce6120cc	345	snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
606689e9 MB	346	ARRAY_SIZE(wm8753_dapm_widgets));
	347
	348	/* add neo1973 gta02 specific controls */
69331fbd LPC	349	err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
	350	ARRAY_SIZE(wm8753_neo1973_gta02_controls));
	351
	352	if (err < 0)
	353	return err;
606689e9 MB	354
606689e9 MB	355	/* set up neo1973 gta02 specific audio path audio_map */
ce6120cc	356	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
606689e9 MB	357
606689e9 MB	358	/* set endpoints to default off mode */
ce6120cc LG	359	snd_soc_dapm_disable_pin(dapm, "Stereo Out");
	360	snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
	361	snd_soc_dapm_disable_pin(dapm, "GSM Line In");
	362	snd_soc_dapm_disable_pin(dapm, "Headset Mic");
	363	snd_soc_dapm_disable_pin(dapm, "Handset Mic");
	364	snd_soc_dapm_disable_pin(dapm, "Handset Spk");
606689e9	365
452a5fd6	366	/* allow audio paths from the GSM modem to run during suspend */
ce6120cc LG	367	snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");
	368	snd_soc_dapm_ignore_suspend(dapm, "GSM Line Out");
	369	snd_soc_dapm_ignore_suspend(dapm, "GSM Line In");
	370	snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
	371	snd_soc_dapm_ignore_suspend(dapm, "Handset Mic");
	372	snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");
	373
	374	snd_soc_dapm_sync(dapm);
606689e9 MB	375
	376	return 0;
	377	}
	378
	379	/*
	380	* BT Codec DAI
	381	*/
f0fba2ad LG	382	static struct snd_soc_dai_driver bt_dai = {
f0fba2ad LG	383	.name = "bluetooth-dai",
606689e9 MB	384	.playback = {
	385	.channels_min = 1,
	386	.channels_max = 1,
	387	.rates = SNDRV_PCM_RATE_8000,
	388	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	389	.capture = {
	390	.channels_min = 1,
	391	.channels_max = 1,
	392	.rates = SNDRV_PCM_RATE_8000,
	393	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	394	};
	395
	396	static struct snd_soc_dai_link neo1973_gta02_dai[] = {
	397	{ /* Hifi Playback - for similatious use with voice below */
	398	.name = "WM8753",
	399	.stream_name = "WM8753 HiFi",
f0fba2ad LG	400	.cpu_dai_name = "s3c24xx-i2s",
f0fba2ad LG	401	.codec_dai_name = "wm8753-hifi",
606689e9	402	.init = neo1973_gta02_wm8753_init,
58bb4072	403	.platform_name = "samsung-audio",
f0fba2ad	404	.codec_name = "wm8753-codec.0-0x1a",
606689e9 MB	405	.ops = &neo1973_gta02_hifi_ops,
	406	},
	407	{ /* Voice via BT */
	408	.name = "Bluetooth",
	409	.stream_name = "Voice",
f0fba2ad LG	410	.cpu_dai_name = "bluetooth-dai",
f0fba2ad LG	411	.codec_dai_name = "wm8753-voice",
606689e9	412	.ops = &neo1973_gta02_voice_ops,
f0fba2ad	413	.codec_name = "wm8753-codec.0-0x1a",
58bb4072	414	.platform_name = "samsung-audio",
606689e9 MB	415	},
	416	};
	417
	418	static struct snd_soc_card neo1973_gta02 = {
	419	.name = "neo1973-gta02",
606689e9 MB	420	.dai_link = neo1973_gta02_dai,
	421	.num_links = ARRAY_SIZE(neo1973_gta02_dai),
	422	};
	423
606689e9 MB	424	static struct platform_device *neo1973_gta02_snd_device;
	425
	426	static int __init neo1973_gta02_init(void)
	427	{
	428	int ret;
	429
	430	if (!machine_is_neo1973_gta02()) {
	431	printk(KERN_INFO
	432	"Only GTA02 is supported by this ASoC driver\n");
	433	return -ENODEV;
	434	}
	435
606689e9 MB	436	neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
	437	if (!neo1973_gta02_snd_device)
	438	return -ENOMEM;
	439
f0fba2ad	440	/* register bluetooth DAI here */
8ce28bfc	441	ret = snd_soc_register_dai(&neo1973_gta02_snd_device->dev, &bt_dai);
b6a11f49 AL	442	if (ret)
b6a11f49 AL	443	goto err_put_device;
f0fba2ad LG	444
f0fba2ad LG	445	platform_set_drvdata(neo1973_gta02_snd_device, &neo1973_gta02);
606689e9 MB	446	ret = platform_device_add(neo1973_gta02_snd_device);
606689e9 MB	447
b6a11f49 AL	448	if (ret)
b6a11f49 AL	449	goto err_unregister_dai;
606689e9 MB	450
606689e9 MB	451	/* Initialise GPIOs used by amp */
82c4362e LPC	452	ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
	453	if (ret) {
	454	pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
b6a11f49	455	goto err_del_device;
82c4362e	456	}
606689e9	457
f0fba2ad	458	ret = gpio_direction_output(GTA02_GPIO_HP_IN, 1);
82c4362e LPC	459	if (ret) {
	460	pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
	461	goto err_free_gpio_hp_in;
	462	}
606689e9	463
82c4362e LPC	464	ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
	465	if (ret) {
	466	pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
	467	goto err_free_gpio_hp_in;
	468	}
606689e9	469
82c4362e LPC	470	ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
	471	if (ret) {
	472	pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
	473	goto err_free_gpio_amp_shut;
	474	}
	475
	476	return 0;
	477
	478	err_free_gpio_amp_shut:
	479	gpio_free(GTA02_GPIO_AMP_SHUT);
	480	err_free_gpio_hp_in:
	481	gpio_free(GTA02_GPIO_HP_IN);
b6a11f49 AL	482	err_del_device:
	483	platform_device_del(neo1973_gta02_snd_device);
	484	err_unregister_dai:
	485	snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
	486	err_put_device:
	487	platform_device_put(neo1973_gta02_snd_device);
606689e9 MB	488	return ret;
	489	}
	490	module_init(neo1973_gta02_init);
	491
	492	static void __exit neo1973_gta02_exit(void)
	493	{
8ce28bfc	494	snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
606689e9	495	platform_device_unregister(neo1973_gta02_snd_device);
82c4362e LPC	496	gpio_free(GTA02_GPIO_HP_IN);
82c4362e LPC	497	gpio_free(GTA02_GPIO_AMP_SHUT);
606689e9 MB	498	}
	499	module_exit(neo1973_gta02_exit);
	500
	501	/* Module information */
	502	MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
	503	MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
	504	MODULE_LICENSE("GPL");