[deliverable/linux.git] / sound / soc / codecs / twl4030.c

/*
 * ALSA SoC TWL4030 codec driver
 *
 * Author:      Steve Sakoman, <steve@sakoman.com>
 *
 * 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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/i2c/twl4030.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

#include "twl4030.h"

/*
 * twl4030 register cache & default register settings
 */
static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {
	0x00, /* this register not used		*/
	0x93, /* REG_CODEC_MODE		(0x1)	*/
	0xc3, /* REG_OPTION		(0x2)	*/
	0x00, /* REG_UNKNOWN		(0x3)	*/
	0x00, /* REG_MICBIAS_CTL	(0x4)	*/
	0x24, /* REG_ANAMICL		(0x5)	*/
	0x04, /* REG_ANAMICR		(0x6)	*/
	0x0a, /* REG_AVADC_CTL		(0x7)	*/
	0x00, /* REG_ADCMICSEL		(0x8)	*/
	0x00, /* REG_DIGMIXING		(0x9)	*/
	0x0c, /* REG_ATXL1PGA		(0xA)	*/
	0x0c, /* REG_ATXR1PGA		(0xB)	*/
	0x00, /* REG_AVTXL2PGA		(0xC)	*/
	0x00, /* REG_AVTXR2PGA		(0xD)	*/
	0x01, /* REG_AUDIO_IF		(0xE)	*/
	0x00, /* REG_VOICE_IF		(0xF)	*/
	0x00, /* REG_ARXR1PGA		(0x10)	*/
	0x00, /* REG_ARXL1PGA		(0x11)	*/
	0x6c, /* REG_ARXR2PGA		(0x12)	*/
	0x6c, /* REG_ARXL2PGA		(0x13)	*/
	0x00, /* REG_VRXPGA		(0x14)	*/
	0x00, /* REG_VSTPGA		(0x15)	*/
	0x00, /* REG_VRX2ARXPGA		(0x16)	*/
	0x0c, /* REG_AVDAC_CTL		(0x17)	*/
	0x00, /* REG_ARX2VTXPGA		(0x18)	*/
	0x00, /* REG_ARXL1_APGA_CTL	(0x19)	*/
	0x00, /* REG_ARXR1_APGA_CTL	(0x1A)	*/
	0x4b, /* REG_ARXL2_APGA_CTL	(0x1B)	*/
	0x4b, /* REG_ARXR2_APGA_CTL	(0x1C)	*/
	0x00, /* REG_ATX2ARXPGA		(0x1D)	*/
	0x00, /* REG_BT_IF		(0x1E)	*/
	0x00, /* REG_BTPGA		(0x1F)	*/
	0x00, /* REG_BTSTPGA		(0x20)	*/
	0x00, /* REG_EAR_CTL		(0x21)	*/
	0x24, /* REG_HS_SEL		(0x22)	*/
	0x0a, /* REG_HS_GAIN_SET	(0x23)	*/
	0x00, /* REG_HS_POPN_SET	(0x24)	*/
	0x00, /* REG_PREDL_CTL		(0x25)	*/
	0x00, /* REG_PREDR_CTL		(0x26)	*/
	0x00, /* REG_PRECKL_CTL		(0x27)	*/
	0x00, /* REG_PRECKR_CTL		(0x28)	*/
	0x00, /* REG_HFL_CTL		(0x29)	*/
	0x00, /* REG_HFR_CTL		(0x2A)	*/
	0x00, /* REG_ALC_CTL		(0x2B)	*/
	0x00, /* REG_ALC_SET1		(0x2C)	*/
	0x00, /* REG_ALC_SET2		(0x2D)	*/
	0x00, /* REG_BOOST_CTL		(0x2E)	*/
	0x00, /* REG_SOFTVOL_CTL	(0x2F)	*/
	0x00, /* REG_DTMF_FREQSEL	(0x30)	*/
	0x00, /* REG_DTMF_TONEXT1H	(0x31)	*/
	0x00, /* REG_DTMF_TONEXT1L	(0x32)	*/
	0x00, /* REG_DTMF_TONEXT2H	(0x33)	*/
	0x00, /* REG_DTMF_TONEXT2L	(0x34)	*/
	0x00, /* REG_DTMF_TONOFF	(0x35)	*/
	0x00, /* REG_DTMF_WANONOFF	(0x36)	*/
	0x00, /* REG_I2S_RX_SCRAMBLE_H	(0x37)	*/
	0x00, /* REG_I2S_RX_SCRAMBLE_M	(0x38)	*/
	0x00, /* REG_I2S_RX_SCRAMBLE_L	(0x39)	*/
	0x16, /* REG_APLL_CTL		(0x3A)	*/
	0x00, /* REG_DTMF_CTL		(0x3B)	*/
	0x00, /* REG_DTMF_PGA_CTL2	(0x3C)	*/
	0x00, /* REG_DTMF_PGA_CTL1	(0x3D)	*/
	0x00, /* REG_MISC_SET_1		(0x3E)	*/
	0x00, /* REG_PCMBTMUX		(0x3F)	*/
	0x00, /* not used		(0x40)	*/
	0x00, /* not used		(0x41)	*/
	0x00, /* not used		(0x42)	*/
	0x00, /* REG_RX_PATH_SEL	(0x43)	*/
	0x00, /* REG_VDL_APGA_CTL	(0x44)	*/
	0x00, /* REG_VIBRA_CTL		(0x45)	*/
	0x00, /* REG_VIBRA_SET		(0x46)	*/
	0x00, /* REG_VIBRA_PWM_SET	(0x47)	*/
	0x00, /* REG_ANAMIC_GAIN	(0x48)	*/
	0x00, /* REG_MISC_SET_2		(0x49)	*/
};

/*
 * read twl4030 register cache
 */
static inline unsigned int twl4030_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u8 *cache = codec->reg_cache;

	return cache[reg];
}

/*
 * write twl4030 register cache
 */
static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec,
						u8 reg, u8 value)
{
	u8 *cache = codec->reg_cache;

	if (reg >= TWL4030_CACHEREGNUM)
		return;
	cache[reg] = value;
}

/*
 * write to the twl4030 register space
 */
static int twl4030_write(struct snd_soc_codec *codec,
			unsigned int reg, unsigned int value)
{
	twl4030_write_reg_cache(codec, reg, value);
	return twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
}

static void twl4030_clear_codecpdz(struct snd_soc_codec *codec)
{
	u8 mode;

	mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
	twl4030_write(codec, TWL4030_REG_CODEC_MODE,
		mode & ~TWL4030_CODECPDZ);

	/* REVISIT: this delay is present in TI sample drivers */
	/* but there seems to be no TRM requirement for it     */
	udelay(10);
}

static void twl4030_set_codecpdz(struct snd_soc_codec *codec)
{
	u8 mode;

	mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
	twl4030_write(codec, TWL4030_REG_CODEC_MODE,
		mode | TWL4030_CODECPDZ);

	/* REVISIT: this delay is present in TI sample drivers */
	/* but there seems to be no TRM requirement for it     */
	udelay(10);
}

static void twl4030_init_chip(struct snd_soc_codec *codec)
{
	int i;

	/* clear CODECPDZ prior to setting register defaults */
	twl4030_clear_codecpdz(codec);

	/* set all audio section registers to reasonable defaults */
	for (i = TWL4030_REG_OPTION; i <= TWL4030_REG_MISC_SET_2; i++)
		twl4030_write(codec, i,	twl4030_reg[i]);

}

static const struct snd_kcontrol_new twl4030_snd_controls[] = {
	SOC_DOUBLE_R("Master Playback Volume",
		 TWL4030_REG_ARXL2PGA, TWL4030_REG_ARXR2PGA,
		0, 0x3f, 0),
	SOC_DOUBLE_R("Capture Volume",
		 TWL4030_REG_ATXL1PGA, TWL4030_REG_ATXR1PGA,
		0, 0x1f, 0),
};

/* add non dapm controls */
static int twl4030_add_controls(struct snd_soc_codec *codec)
{
	int err, i;

	for (i = 0; i < ARRAY_SIZE(twl4030_snd_controls); i++) {
		err = snd_ctl_add(codec->card,
				  snd_soc_cnew(&twl4030_snd_controls[i],
						codec, NULL));
		if (err < 0)
			return err;
	}

	return 0;
}

static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("INL"),
	SND_SOC_DAPM_INPUT("INR"),

	SND_SOC_DAPM_OUTPUT("OUTL"),
	SND_SOC_DAPM_OUTPUT("OUTR"),

	SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0),
};

static const struct snd_soc_dapm_route intercon[] = {
	/* outputs */
	{"OUTL", NULL, "DACL"},
	{"OUTR", NULL, "DACR"},

	/* inputs */
	{"ADCL", NULL, "INL"},
	{"ADCR", NULL, "INR"},
};

static int twl4030_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, twl4030_dapm_widgets,
				 ARRAY_SIZE(twl4030_dapm_widgets));

	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));

	snd_soc_dapm_new_widgets(codec);
	return 0;
}

static void twl4030_power_up(struct snd_soc_codec *codec)
{
	u8 anamicl, regmisc1, byte, popn, hsgain;
	int i = 0;

	/* set CODECPDZ to turn on codec */
	twl4030_set_codecpdz(codec);

	/* initiate offset cancellation */
	anamicl = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICL);
	twl4030_write(codec, TWL4030_REG_ANAMICL,
		anamicl | TWL4030_CNCL_OFFSET_START);

	/* wait for offset cancellation to complete */
	do {
		/* this takes a little while, so don't slam i2c */
		udelay(2000);
		twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &byte,
				    TWL4030_REG_ANAMICL);
	} while ((i++ < 100) &&
		 ((byte & TWL4030_CNCL_OFFSET_START) ==
		  TWL4030_CNCL_OFFSET_START));

	/* anti-pop when changing analog gain */
	regmisc1 = twl4030_read_reg_cache(codec, TWL4030_REG_MISC_SET_1);
	twl4030_write(codec, TWL4030_REG_MISC_SET_1,
		regmisc1 | TWL4030_SMOOTH_ANAVOL_EN);

	/* toggle CODECPDZ as per TRM */
	twl4030_clear_codecpdz(codec);
	twl4030_set_codecpdz(codec);

	/* program anti-pop with bias ramp delay */
	popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
	popn &= TWL4030_RAMP_DELAY;
	popn |=	TWL4030_RAMP_DELAY_645MS;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
	popn |=	TWL4030_VMID_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);

	/* enable output stage and gain setting */
	hsgain = TWL4030_HSR_GAIN_0DB | TWL4030_HSL_GAIN_0DB;
	twl4030_write(codec, TWL4030_REG_HS_GAIN_SET, hsgain);

	/* enable anti-pop ramp */
	popn |= TWL4030_RAMP_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
}

static void twl4030_power_down(struct snd_soc_codec *codec)
{
	u8 popn, hsgain;

	/* disable anti-pop ramp */
	popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
	popn &= ~TWL4030_RAMP_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);

	/* disable output stage and gain setting */
	hsgain = TWL4030_HSR_GAIN_PWR_DOWN | TWL4030_HSL_GAIN_PWR_DOWN;
	twl4030_write(codec, TWL4030_REG_HS_GAIN_SET, hsgain);

	/* disable bias out */
	popn &= ~TWL4030_VMID_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);

	/* power down */
	twl4030_clear_codecpdz(codec);
}

static int twl4030_set_bias_level(struct snd_soc_codec *codec,
				  enum snd_soc_bias_level level)
{
	switch (level) {
	case SND_SOC_BIAS_ON:
		twl4030_power_up(codec);
		break;
	case SND_SOC_BIAS_PREPARE:
		/* TODO: develop a twl4030_prepare function */
		break;
	case SND_SOC_BIAS_STANDBY:
		/* TODO: develop a twl4030_standby function */
		twl4030_power_down(codec);
		break;
	case SND_SOC_BIAS_OFF:
		twl4030_power_down(codec);
		break;
	}
	codec->bias_level = level;

	return 0;
}

static int twl4030_hw_params(struct snd_pcm_substream *substream,
			   struct snd_pcm_hw_params *params,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->codec;
	u8 mode, old_mode, format, old_format;


	/* bit rate */
	old_mode = twl4030_read_reg_cache(codec,
			TWL4030_REG_CODEC_MODE) & ~TWL4030_CODECPDZ;
	mode = old_mode & ~TWL4030_APLL_RATE;

	switch (params_rate(params)) {
	case 8000:
		mode |= TWL4030_APLL_RATE_8000;
		break;
	case 11025:
		mode |= TWL4030_APLL_RATE_11025;
		break;
	case 12000:
		mode |= TWL4030_APLL_RATE_12000;
		break;
	case 16000:
		mode |= TWL4030_APLL_RATE_16000;
		break;
	case 22050:
		mode |= TWL4030_APLL_RATE_22050;
		break;
	case 24000:
		mode |= TWL4030_APLL_RATE_24000;
		break;
	case 32000:
		mode |= TWL4030_APLL_RATE_32000;
		break;
	case 44100:
		mode |= TWL4030_APLL_RATE_44100;
		break;
	case 48000:
		mode |= TWL4030_APLL_RATE_48000;
		break;
	default:
		printk(KERN_ERR "TWL4030 hw params: unknown rate %d\n",
			params_rate(params));
		return -EINVAL;
	}

	if (mode != old_mode) {
		/* change rate and set CODECPDZ */
		twl4030_write(codec, TWL4030_REG_CODEC_MODE, mode);
		twl4030_set_codecpdz(codec);
	}

	/* sample size */
	old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
	format = old_format;
	format &= ~TWL4030_DATA_WIDTH;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		format |= TWL4030_DATA_WIDTH_16S_16W;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		format |= TWL4030_DATA_WIDTH_32S_24W;
		break;
	default:
		printk(KERN_ERR "TWL4030 hw params: unknown format %d\n",
			params_format(params));
		return -EINVAL;
	}

	if (format != old_format) {

		/* clear CODECPDZ before changing format (codec requirement) */
		twl4030_clear_codecpdz(codec);

		/* change format */
		twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);

		/* set CODECPDZ afterwards */
		twl4030_set_codecpdz(codec);
	}
	return 0;
}

static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai,
		int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 infreq;

	switch (freq) {
	case 19200000:
		infreq = TWL4030_APLL_INFREQ_19200KHZ;
		break;
	case 26000000:
		infreq = TWL4030_APLL_INFREQ_26000KHZ;
		break;
	case 38400000:
		infreq = TWL4030_APLL_INFREQ_38400KHZ;
		break;
	default:
		printk(KERN_ERR "TWL4030 set sysclk: unknown rate %d\n",
			freq);
		return -EINVAL;
	}

	infreq |= TWL4030_APLL_EN;
	twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq);

	return 0;
}

static int twl4030_set_dai_fmt(struct snd_soc_dai *codec_dai,
			     unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 old_format, format;

	/* get format */
	old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
	format = old_format;

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		format &= ~(TWL4030_AIF_SLAVE_EN);
		format &= ~(TWL4030_CLK256FS_EN);
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		format |= TWL4030_AIF_SLAVE_EN;
		format |= TWL4030_CLK256FS_EN;
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	format &= ~TWL4030_AIF_FORMAT;
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		format |= TWL4030_AIF_FORMAT_CODEC;
		break;
	default:
		return -EINVAL;
	}

	if (format != old_format) {

		/* clear CODECPDZ before changing format (codec requirement) */
		twl4030_clear_codecpdz(codec);

		/* change format */
		twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);

		/* set CODECPDZ afterwards */
		twl4030_set_codecpdz(codec);
	}

	return 0;
}

#define TWL4030_RATES	 (SNDRV_PCM_RATE_8000_48000)
#define TWL4030_FORMATS	 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_S24_LE)

struct snd_soc_dai twl4030_dai = {
	.name = "twl4030",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = TWL4030_RATES,
		.formats = TWL4030_FORMATS,},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = TWL4030_RATES,
		.formats = TWL4030_FORMATS,},
	.ops = {
		.hw_params = twl4030_hw_params,
		.set_sysclk = twl4030_set_dai_sysclk,
		.set_fmt = twl4030_set_dai_fmt,
	}
};
EXPORT_SYMBOL_GPL(twl4030_dai);

static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;

	twl4030_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int twl4030_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;

	twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	twl4030_set_bias_level(codec, codec->suspend_bias_level);
	return 0;
}

/*
 * initialize the driver
 * register the mixer and dsp interfaces with the kernel
 */

static int twl4030_init(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->codec;
	int ret = 0;

	printk(KERN_INFO "TWL4030 Audio Codec init \n");

	codec->name = "twl4030";
	codec->owner = THIS_MODULE;
	codec->read = twl4030_read_reg_cache;
	codec->write = twl4030_write;
	codec->set_bias_level = twl4030_set_bias_level;
	codec->dai = &twl4030_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = sizeof(twl4030_reg);
	codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
					GFP_KERNEL);
	if (codec->reg_cache == NULL)
		return -ENOMEM;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "twl4030: failed to create pcms\n");
		goto pcm_err;
	}

	twl4030_init_chip(codec);

	/* power on device */
	twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	twl4030_add_controls(codec);
	twl4030_add_widgets(codec);

	ret = snd_soc_register_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "twl4030: failed to register card\n");
		goto card_err;
	}

	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
pcm_err:
	kfree(codec->reg_cache);
	return ret;
}

static struct snd_soc_device *twl4030_socdev;

static int twl4030_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;

	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;

	socdev->codec = codec;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	twl4030_socdev = socdev;
	twl4030_init(socdev);

	return 0;
}

static int twl4030_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;

	printk(KERN_INFO "TWL4030 Audio Codec remove\n");
	kfree(codec);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_twl4030 = {
	.probe = twl4030_probe,
	.remove = twl4030_remove,
	.suspend = twl4030_suspend,
	.resume = twl4030_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);

MODULE_DESCRIPTION("ASoC TWL4030 codec driver");
MODULE_AUTHOR("Steve Sakoman");
MODULE_LICENSE("GPL");
Commit	Line	Data
cc17557e SS	1	/*
	2	* ALSA SoC TWL4030 codec driver
	3	*
	4	* Author: Steve Sakoman, <steve@sakoman.com>
	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
	22	#include <linux/module.h>
	23	#include <linux/moduleparam.h>
	24	#include <linux/init.h>
	25	#include <linux/delay.h>
	26	#include <linux/pm.h>
	27	#include <linux/i2c.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/i2c/twl4030.h>
	30	#include <sound/core.h>
	31	#include <sound/pcm.h>
	32	#include <sound/pcm_params.h>
	33	#include <sound/soc.h>
	34	#include <sound/soc-dapm.h>
	35	#include <sound/initval.h>
	36
	37	#include "twl4030.h"
	38
	39	/*
	40	* twl4030 register cache & default register settings
	41	*/
	42	static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {
	43	0x00, /* this register not used */
	44	0x93, /* REG_CODEC_MODE (0x1) */
	45	0xc3, /* REG_OPTION (0x2) */
	46	0x00, /* REG_UNKNOWN (0x3) */
	47	0x00, /* REG_MICBIAS_CTL (0x4) */
	48	0x24, /* REG_ANAMICL (0x5) */
	49	0x04, /* REG_ANAMICR (0x6) */
	50	0x0a, /* REG_AVADC_CTL (0x7) */
	51	0x00, /* REG_ADCMICSEL (0x8) */
	52	0x00, /* REG_DIGMIXING (0x9) */
	53	0x0c, /* REG_ATXL1PGA (0xA) */
	54	0x0c, /* REG_ATXR1PGA (0xB) */
	55	0x00, /* REG_AVTXL2PGA (0xC) */
	56	0x00, /* REG_AVTXR2PGA (0xD) */
	57	0x01, /* REG_AUDIO_IF (0xE) */
	58	0x00, /* REG_VOICE_IF (0xF) */
	59	0x00, /* REG_ARXR1PGA (0x10) */
	60	0x00, /* REG_ARXL1PGA (0x11) */
	61	0x6c, /* REG_ARXR2PGA (0x12) */
	62	0x6c, /* REG_ARXL2PGA (0x13) */
	63	0x00, /* REG_VRXPGA (0x14) */
	64	0x00, /* REG_VSTPGA (0x15) */
65	0x00, /* REG_VRX2ARXPGA (0x16) */
66	0x0c, /* REG_AVDAC_CTL (0x17) */
67	0x00, /* REG_ARX2VTXPGA (0x18) */
68	0x00, /* REG_ARXL1_APGA_CTL (0x19) */
69	0x00, /* REG_ARXR1_APGA_CTL (0x1A) */
70	0x4b, /* REG_ARXL2_APGA_CTL (0x1B) */
71	0x4b, /* REG_ARXR2_APGA_CTL (0x1C) */
72	0x00, /* REG_ATX2ARXPGA (0x1D) */
73	0x00, /* REG_BT_IF (0x1E) */
74	0x00, /* REG_BTPGA (0x1F) */
75	0x00, /* REG_BTSTPGA (0x20) */
76	0x00, /* REG_EAR_CTL (0x21) */
77	0x24, /* REG_HS_SEL (0x22) */
78	0x0a, /* REG_HS_GAIN_SET (0x23) */
79	0x00, /* REG_HS_POPN_SET (0x24) */
80	0x00, /* REG_PREDL_CTL (0x25) */
81	0x00, /* REG_PREDR_CTL (0x26) */
82	0x00, /* REG_PRECKL_CTL (0x27) */
83	0x00, /* REG_PRECKR_CTL (0x28) */
84	0x00, /* REG_HFL_CTL (0x29) */
85	0x00, /* REG_HFR_CTL (0x2A) */
86	0x00, /* REG_ALC_CTL (0x2B) */
87	0x00, /* REG_ALC_SET1 (0x2C) */
88	0x00, /* REG_ALC_SET2 (0x2D) */
89	0x00, /* REG_BOOST_CTL (0x2E) */
f8d05bdb	90	0x00, /* REG_SOFTVOL_CTL (0x2F) */
cc17557e SS	91	0x00, /* REG_DTMF_FREQSEL (0x30) */
	92	0x00, /* REG_DTMF_TONEXT1H (0x31) */
	93	0x00, /* REG_DTMF_TONEXT1L (0x32) */
	94	0x00, /* REG_DTMF_TONEXT2H (0x33) */
	95	0x00, /* REG_DTMF_TONEXT2L (0x34) */
	96	0x00, /* REG_DTMF_TONOFF (0x35) */
	97	0x00, /* REG_DTMF_WANONOFF (0x36) */
	98	0x00, /* REG_I2S_RX_SCRAMBLE_H (0x37) */
	99	0x00, /* REG_I2S_RX_SCRAMBLE_M (0x38) */
	100	0x00, /* REG_I2S_RX_SCRAMBLE_L (0x39) */
	101	0x16, /* REG_APLL_CTL (0x3A) */
	102	0x00, /* REG_DTMF_CTL (0x3B) */
	103	0x00, /* REG_DTMF_PGA_CTL2 (0x3C) */
	104	0x00, /* REG_DTMF_PGA_CTL1 (0x3D) */
	105	0x00, /* REG_MISC_SET_1 (0x3E) */
	106	0x00, /* REG_PCMBTMUX (0x3F) */
	107	0x00, /* not used (0x40) */
	108	0x00, /* not used (0x41) */
	109	0x00, /* not used (0x42) */
	110	0x00, /* REG_RX_PATH_SEL (0x43) */
	111	0x00, /* REG_VDL_APGA_CTL (0x44) */
	112	0x00, /* REG_VIBRA_CTL (0x45) */
	113	0x00, /* REG_VIBRA_SET (0x46) */
	114	0x00, /* REG_VIBRA_PWM_SET (0x47) */
	115	0x00, /* REG_ANAMIC_GAIN (0x48) */
	116	0x00, /* REG_MISC_SET_2 (0x49) */
	117	};
	118
	119	/*
	120	* read twl4030 register cache
	121	*/
	122	static inline unsigned int twl4030_read_reg_cache(struct snd_soc_codec *codec,
	123	unsigned int reg)
	124	{
	125	u8 *cache = codec->reg_cache;
	126
	127	return cache[reg];
	128	}
	129
	130	/*
	131	* write twl4030 register cache
	132	*/
	133	static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec,
	134	u8 reg, u8 value)
	135	{
	136	u8 *cache = codec->reg_cache;
	137
	138	if (reg >= TWL4030_CACHEREGNUM)
	139	return;
	140	cache[reg] = value;
	141	}
	142
	143	/*
	144	* write to the twl4030 register space
	145	*/
	146	static int twl4030_write(struct snd_soc_codec *codec,
	147	unsigned int reg, unsigned int value)
	148	{
	149	twl4030_write_reg_cache(codec, reg, value);
	150	return twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
	151	}
	152
	153	static void twl4030_clear_codecpdz(struct snd_soc_codec *codec)
	154	{
155	u8 mode;
156
157	mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
158	twl4030_write(codec, TWL4030_REG_CODEC_MODE,
159	mode & ~TWL4030_CODECPDZ);
160
161	/* REVISIT: this delay is present in TI sample drivers */
162	/* but there seems to be no TRM requirement for it */
163	udelay(10);
164	}
165
166	static void twl4030_set_codecpdz(struct snd_soc_codec *codec)
167	{
168	u8 mode;
169
170	mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
171	twl4030_write(codec, TWL4030_REG_CODEC_MODE,
172	mode \| TWL4030_CODECPDZ);
173
174	/* REVISIT: this delay is present in TI sample drivers */
175	/* but there seems to be no TRM requirement for it */
176	udelay(10);
177	}
178
179	static void twl4030_init_chip(struct snd_soc_codec *codec)
180	{
181	int i;
182
183	/* clear CODECPDZ prior to setting register defaults */
184	twl4030_clear_codecpdz(codec);
185
186	/* set all audio section registers to reasonable defaults */
187	for (i = TWL4030_REG_OPTION; i <= TWL4030_REG_MISC_SET_2; i++)
188	twl4030_write(codec, i, twl4030_reg[i]);
189
190	}
191
192	static const struct snd_kcontrol_new twl4030_snd_controls[] = {
193	SOC_DOUBLE_R("Master Playback Volume",
194	TWL4030_REG_ARXL2PGA, TWL4030_REG_ARXR2PGA,
6e5d9db2	195	0, 0x3f, 0),
cc17557e SS	196	SOC_DOUBLE_R("Capture Volume",
cc17557e SS	197	TWL4030_REG_ATXL1PGA, TWL4030_REG_ATXR1PGA,
6e5d9db2	198	0, 0x1f, 0),
cc17557e SS	199	};
	200
	201	/* add non dapm controls */
	202	static int twl4030_add_controls(struct snd_soc_codec *codec)
	203	{
	204	int err, i;
	205
	206	for (i = 0; i < ARRAY_SIZE(twl4030_snd_controls); i++) {
	207	err = snd_ctl_add(codec->card,
	208	snd_soc_cnew(&twl4030_snd_controls[i],
	209	codec, NULL));
	210	if (err < 0)
	211	return err;
	212	}
	213
	214	return 0;
	215	}
	216
	217	static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
	218	SND_SOC_DAPM_INPUT("INL"),
	219	SND_SOC_DAPM_INPUT("INR"),
	220
	221	SND_SOC_DAPM_OUTPUT("OUTL"),
	222	SND_SOC_DAPM_OUTPUT("OUTR"),
	223
	224	SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
	225	SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
	226
	227	SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0),
	228	SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0),
	229	};
	230
	231	static const struct snd_soc_dapm_route intercon[] = {
	232	/* outputs */
	233	{"OUTL", NULL, "DACL"},
	234	{"OUTR", NULL, "DACR"},
	235
	236	/* inputs */
	237	{"ADCL", NULL, "INL"},
	238	{"ADCR", NULL, "INR"},
	239	};
	240
	241	static int twl4030_add_widgets(struct snd_soc_codec *codec)
	242	{
	243	snd_soc_dapm_new_controls(codec, twl4030_dapm_widgets,
	244	ARRAY_SIZE(twl4030_dapm_widgets));
	245
	246	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	247
	248	snd_soc_dapm_new_widgets(codec);
	249	return 0;
	250	}
	251
	252	static void twl4030_power_up(struct snd_soc_codec *codec)
	253	{
	254	u8 anamicl, regmisc1, byte, popn, hsgain;
	255	int i = 0;
	256
	257	/* set CODECPDZ to turn on codec */
	258	twl4030_set_codecpdz(codec);
	259
	260	/* initiate offset cancellation */
	261	anamicl = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICL);
	262	twl4030_write(codec, TWL4030_REG_ANAMICL,
263	anamicl \| TWL4030_CNCL_OFFSET_START);
264
265	/* wait for offset cancellation to complete */
266	do {
267	/* this takes a little while, so don't slam i2c */
268	udelay(2000);
269	twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &byte,
270	TWL4030_REG_ANAMICL);
271	} while ((i++ < 100) &&
272	((byte & TWL4030_CNCL_OFFSET_START) ==
273	TWL4030_CNCL_OFFSET_START));
274
275	/* anti-pop when changing analog gain */
276	regmisc1 = twl4030_read_reg_cache(codec, TWL4030_REG_MISC_SET_1);
277	twl4030_write(codec, TWL4030_REG_MISC_SET_1,
278	regmisc1 \| TWL4030_SMOOTH_ANAVOL_EN);
279
280	/* toggle CODECPDZ as per TRM */
281	twl4030_clear_codecpdz(codec);
282	twl4030_set_codecpdz(codec);
283
284	/* program anti-pop with bias ramp delay */
285	popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
286	popn &= TWL4030_RAMP_DELAY;
287	popn \|= TWL4030_RAMP_DELAY_645MS;
288	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
289	popn \|= TWL4030_VMID_EN;
290	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
291
292	/* enable output stage and gain setting */
293	hsgain = TWL4030_HSR_GAIN_0DB \| TWL4030_HSL_GAIN_0DB;
294	twl4030_write(codec, TWL4030_REG_HS_GAIN_SET, hsgain);
295
296	/* enable anti-pop ramp */
297	popn \|= TWL4030_RAMP_EN;
298	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
299	}
300
301	static void twl4030_power_down(struct snd_soc_codec *codec)
302	{
303	u8 popn, hsgain;
304
305	/* disable anti-pop ramp */
306	popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
307	popn &= ~TWL4030_RAMP_EN;
308	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
309
310	/* disable output stage and gain setting */
311	hsgain = TWL4030_HSR_GAIN_PWR_DOWN \| TWL4030_HSL_GAIN_PWR_DOWN;
312	twl4030_write(codec, TWL4030_REG_HS_GAIN_SET, hsgain);
313
314	/* disable bias out */
315	popn &= ~TWL4030_VMID_EN;
316	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
317
318	/* power down */
319	twl4030_clear_codecpdz(codec);
320	}
321
322	static int twl4030_set_bias_level(struct snd_soc_codec *codec,
323	enum snd_soc_bias_level level)
324	{
325	switch (level) {
326	case SND_SOC_BIAS_ON:
327	twl4030_power_up(codec);
328	break;
329	case SND_SOC_BIAS_PREPARE:
330	/* TODO: develop a twl4030_prepare function */
331	break;
332	case SND_SOC_BIAS_STANDBY:
333	/* TODO: develop a twl4030_standby function */
334	twl4030_power_down(codec);
335	break;
336	case SND_SOC_BIAS_OFF:
337	twl4030_power_down(codec);
338	break;
339	}
340	codec->bias_level = level;
341
342	return 0;
343	}
344
345	static int twl4030_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	346	struct snd_pcm_hw_params *params,
dee89c4d MB	347	struct snd_soc_dai *dai)
cc17557e SS	348	{
	349	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	350	struct snd_soc_device *socdev = rtd->socdev;
	351	struct snd_soc_codec *codec = socdev->codec;
	352	u8 mode, old_mode, format, old_format;
	353
	354
	355	/* bit rate */
	356	old_mode = twl4030_read_reg_cache(codec,
	357	TWL4030_REG_CODEC_MODE) & ~TWL4030_CODECPDZ;
	358	mode = old_mode & ~TWL4030_APLL_RATE;
	359
	360	switch (params_rate(params)) {
	361	case 8000:
	362	mode \|= TWL4030_APLL_RATE_8000;
	363	break;
	364	case 11025:
	365	mode \|= TWL4030_APLL_RATE_11025;
	366	break;
	367	case 12000:
	368	mode \|= TWL4030_APLL_RATE_12000;
	369	break;
	370	case 16000:
	371	mode \|= TWL4030_APLL_RATE_16000;
	372	break;
	373	case 22050:
	374	mode \|= TWL4030_APLL_RATE_22050;
	375	break;
	376	case 24000:
	377	mode \|= TWL4030_APLL_RATE_24000;
	378	break;
	379	case 32000:
	380	mode \|= TWL4030_APLL_RATE_32000;
	381	break;
	382	case 44100:
	383	mode \|= TWL4030_APLL_RATE_44100;
	384	break;
	385	case 48000:
	386	mode \|= TWL4030_APLL_RATE_48000;
	387	break;
	388	default:
	389	printk(KERN_ERR "TWL4030 hw params: unknown rate %d\n",
	390	params_rate(params));
	391	return -EINVAL;
	392	}
	393
	394	if (mode != old_mode) {
	395	/* change rate and set CODECPDZ */
	396	twl4030_write(codec, TWL4030_REG_CODEC_MODE, mode);
	397	twl4030_set_codecpdz(codec);
	398	}
	399
	400	/* sample size */
	401	old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
	402	format = old_format;
	403	format &= ~TWL4030_DATA_WIDTH;
	404	switch (params_format(params)) {
	405	case SNDRV_PCM_FORMAT_S16_LE:
	406	format \|= TWL4030_DATA_WIDTH_16S_16W;
	407	break;
	408	case SNDRV_PCM_FORMAT_S24_LE:
	409	format \|= TWL4030_DATA_WIDTH_32S_24W;
	410	break;
	411	default:
412	printk(KERN_ERR "TWL4030 hw params: unknown format %d\n",
413	params_format(params));
414	return -EINVAL;
415	}
416
417	if (format != old_format) {
418
419	/* clear CODECPDZ before changing format (codec requirement) */
420	twl4030_clear_codecpdz(codec);
421
422	/* change format */
423	twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);
424
425	/* set CODECPDZ afterwards */
426	twl4030_set_codecpdz(codec);
427	}
428	return 0;
429	}
430
431	static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai,
432	int clk_id, unsigned int freq, int dir)
433	{
434	struct snd_soc_codec *codec = codec_dai->codec;
435	u8 infreq;
436
437	switch (freq) {
438	case 19200000:
439	infreq = TWL4030_APLL_INFREQ_19200KHZ;
440	break;
441	case 26000000:
442	infreq = TWL4030_APLL_INFREQ_26000KHZ;
443	break;
444	case 38400000:
445	infreq = TWL4030_APLL_INFREQ_38400KHZ;
446	break;
447	default:
448	printk(KERN_ERR "TWL4030 set sysclk: unknown rate %d\n",
449	freq);
450	return -EINVAL;
451	}
452
453	infreq \|= TWL4030_APLL_EN;
454	twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq);
455
456	return 0;
457	}
458
459	static int twl4030_set_dai_fmt(struct snd_soc_dai *codec_dai,
460	unsigned int fmt)
461	{
462	struct snd_soc_codec *codec = codec_dai->codec;
463	u8 old_format, format;
464
465	/* get format */
466	old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
467	format = old_format;
468
469	/* set master/slave audio interface */
470	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
471	case SND_SOC_DAIFMT_CBM_CFM:
472	format &= ~(TWL4030_AIF_SLAVE_EN);
e18c94d2	473	format &= ~(TWL4030_CLK256FS_EN);
cc17557e SS	474	break;
cc17557e SS	475	case SND_SOC_DAIFMT_CBS_CFS:
cc17557e	476	format \|= TWL4030_AIF_SLAVE_EN;
e18c94d2	477	format \|= TWL4030_CLK256FS_EN;
cc17557e SS	478	break;
	479	default:
	480	return -EINVAL;
	481	}
	482
	483	/* interface format */
	484	format &= ~TWL4030_AIF_FORMAT;
	485	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	486	case SND_SOC_DAIFMT_I2S:
	487	format \|= TWL4030_AIF_FORMAT_CODEC;
	488	break;
	489	default:
	490	return -EINVAL;
	491	}
	492
	493	if (format != old_format) {
	494
	495	/* clear CODECPDZ before changing format (codec requirement) */
	496	twl4030_clear_codecpdz(codec);
	497
	498	/* change format */
	499	twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);
	500
	501	/* set CODECPDZ afterwards */
	502	twl4030_set_codecpdz(codec);
	503	}
	504
	505	return 0;
	506	}
	507
bbba9444	508	#define TWL4030_RATES (SNDRV_PCM_RATE_8000_48000)
cc17557e SS	509	#define TWL4030_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FORMAT_S24_LE)
	510
	511	struct snd_soc_dai twl4030_dai = {
	512	.name = "twl4030",
	513	.playback = {
	514	.stream_name = "Playback",
	515	.channels_min = 2,
	516	.channels_max = 2,
	517	.rates = TWL4030_RATES,
	518	.formats = TWL4030_FORMATS,},
	519	.capture = {
	520	.stream_name = "Capture",
	521	.channels_min = 2,
	522	.channels_max = 2,
	523	.rates = TWL4030_RATES,
	524	.formats = TWL4030_FORMATS,},
	525	.ops = {
	526	.hw_params = twl4030_hw_params,
cc17557e SS	527	.set_sysclk = twl4030_set_dai_sysclk,
	528	.set_fmt = twl4030_set_dai_fmt,
	529	}
	530	};
	531	EXPORT_SYMBOL_GPL(twl4030_dai);
	532
	533	static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
	534	{
	535	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	536	struct snd_soc_codec *codec = socdev->codec;
	537
	538	twl4030_set_bias_level(codec, SND_SOC_BIAS_OFF);
	539
	540	return 0;
	541	}
	542
	543	static int twl4030_resume(struct platform_device *pdev)
	544	{
	545	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	546	struct snd_soc_codec *codec = socdev->codec;
	547
	548	twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	549	twl4030_set_bias_level(codec, codec->suspend_bias_level);
	550	return 0;
	551	}
	552
	553	/*
	554	* initialize the driver
	555	* register the mixer and dsp interfaces with the kernel
	556	*/
	557
	558	static int twl4030_init(struct snd_soc_device *socdev)
	559	{
	560	struct snd_soc_codec *codec = socdev->codec;
	561	int ret = 0;
	562
	563	printk(KERN_INFO "TWL4030 Audio Codec init \n");
	564
	565	codec->name = "twl4030";
	566	codec->owner = THIS_MODULE;
	567	codec->read = twl4030_read_reg_cache;
	568	codec->write = twl4030_write;
	569	codec->set_bias_level = twl4030_set_bias_level;
	570	codec->dai = &twl4030_dai;
	571	codec->num_dai = 1;
	572	codec->reg_cache_size = sizeof(twl4030_reg);
	573	codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
	574	GFP_KERNEL);
	575	if (codec->reg_cache == NULL)
	576	return -ENOMEM;
	577
	578	/* register pcms */
	579	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	580	if (ret < 0) {
	581	printk(KERN_ERR "twl4030: failed to create pcms\n");
	582	goto pcm_err;
	583	}
	584
	585	twl4030_init_chip(codec);
	586
	587	/* power on device */
	588	twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	589
	590	twl4030_add_controls(codec);
591	twl4030_add_widgets(codec);
592
593	ret = snd_soc_register_card(socdev);
594	if (ret < 0) {
595	printk(KERN_ERR "twl4030: failed to register card\n");
596	goto card_err;
597	}
598
599	return ret;
600
601	card_err:
602	snd_soc_free_pcms(socdev);
603	snd_soc_dapm_free(socdev);
604	pcm_err:
605	kfree(codec->reg_cache);
606	return ret;
607	}
608
609	static struct snd_soc_device *twl4030_socdev;
610
611	static int twl4030_probe(struct platform_device *pdev)
612	{
613	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
614	struct snd_soc_codec *codec;
615
616	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
617	if (codec == NULL)
618	return -ENOMEM;
619
620	socdev->codec = codec;
621	mutex_init(&codec->mutex);
622	INIT_LIST_HEAD(&codec->dapm_widgets);
623	INIT_LIST_HEAD(&codec->dapm_paths);
624
625	twl4030_socdev = socdev;
626	twl4030_init(socdev);
627
628	return 0;
629	}
630
631	static int twl4030_remove(struct platform_device *pdev)
632	{
633	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
634	struct snd_soc_codec *codec = socdev->codec;
635
636	printk(KERN_INFO "TWL4030 Audio Codec remove\n");
637	kfree(codec);
638
639	return 0;
640	}
641
642	struct snd_soc_codec_device soc_codec_dev_twl4030 = {
643	.probe = twl4030_probe,
644	.remove = twl4030_remove,
645	.suspend = twl4030_suspend,
646	.resume = twl4030_resume,
647	};
648	EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);
649
650	MODULE_DESCRIPTION("ASoC TWL4030 codec driver");
651	MODULE_AUTHOR("Steve Sakoman");
652	MODULE_LICENSE("GPL");