[deliverable/linux.git] / sound / soc / codecs / ssm2602.c

/*
 * File:         sound/soc/codecs/ssm2602.c
 * Author:       Cliff Cai <Cliff.Cai@analog.com>
 *
 * Created:      Tue June 06 2008
 * Description:  Driver for ssm2602 sound chip
 *
 * Modified:
 *               Copyright 2008 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * 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.
 *
 * 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, see the file COPYING, or 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/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>

#include "ssm2602.h"

#define SSM2602_VERSION "0.1"

/* codec private data */
struct ssm2602_priv {
	unsigned int sysclk;
	enum snd_soc_control_type control_type;
	struct snd_pcm_substream *master_substream;
	struct snd_pcm_substream *slave_substream;
};

/*
 * ssm2602 register cache
 * We can't read the ssm2602 register space when we are
 * using 2 wire for device control, so we cache them instead.
 * There is no point in caching the reset register
 */
static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
	0x0017, 0x0017, 0x0079, 0x0079,
	0x0000, 0x0000, 0x0000, 0x000a,
	0x0000, 0x0000
};

#define ssm2602_reset(c)	snd_soc_write(c, SSM2602_RESET, 0)

/*Appending several "None"s just for OSS mixer use*/
static const char *ssm2602_input_select[] = {
	"Line", "Mic", "None", "None", "None",
	"None", "None", "None",
};

static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};

static const struct soc_enum ssm2602_enum[] = {
	SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
	SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
};

static const struct snd_kcontrol_new ssm2602_snd_controls[] = {

SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
	0, 127, 0),
SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
	7, 1, 0),

SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),

SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
SOC_SINGLE("Mic Boost2 (+20dB)", SSM2602_APANA, 7, 1, 0),
SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),

SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),

SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),

SOC_ENUM("Capture Source", ssm2602_enum[0]),

SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
};

/* Output Mixer */
static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
};

/* Input mux */
static const struct snd_kcontrol_new ssm2602_input_mux_controls =
SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);

static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
	&ssm2602_output_mixer_controls[0],
	ARRAY_SIZE(ssm2602_output_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("LHPOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("RHPOUT"),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
SND_SOC_DAPM_INPUT("MICIN"),
SND_SOC_DAPM_INPUT("RLINEIN"),
SND_SOC_DAPM_INPUT("LLINEIN"),
};

static const struct snd_soc_dapm_route audio_conn[] = {
	/* output mixer */
	{"Output Mixer", "Line Bypass Switch", "Line Input"},
	{"Output Mixer", "HiFi Playback Switch", "DAC"},
	{"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},

	/* outputs */
	{"RHPOUT", NULL, "Output Mixer"},
	{"ROUT", NULL, "Output Mixer"},
	{"LHPOUT", NULL, "Output Mixer"},
	{"LOUT", NULL, "Output Mixer"},

	/* input mux */
	{"Input Mux", "Line", "Line Input"},
	{"Input Mux", "Mic", "Mic Bias"},
	{"ADC", NULL, "Input Mux"},

	/* inputs */
	{"Line Input", NULL, "LLINEIN"},
	{"Line Input", NULL, "RLINEIN"},
	{"Mic Bias", NULL, "MICIN"},
};

static int ssm2602_add_widgets(struct snd_soc_codec *codec)
{
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	snd_soc_dapm_new_controls(dapm, ssm2602_dapm_widgets,
				  ARRAY_SIZE(ssm2602_dapm_widgets));
	snd_soc_dapm_add_routes(dapm, audio_conn, ARRAY_SIZE(audio_conn));

	return 0;
}

struct _coeff_div {
	u32 mclk;
	u32 rate;
	u16 fs;
	u8 sr:4;
	u8 bosr:1;
	u8 usb:1;
};

/* codec mclk clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
	/* 48k */
	{12288000, 48000, 256, 0x0, 0x0, 0x0},
	{18432000, 48000, 384, 0x0, 0x1, 0x0},
	{12000000, 48000, 250, 0x0, 0x0, 0x1},

	/* 32k */
	{12288000, 32000, 384, 0x6, 0x0, 0x0},
	{18432000, 32000, 576, 0x6, 0x1, 0x0},
	{12000000, 32000, 375, 0x6, 0x0, 0x1},

	/* 8k */
	{12288000, 8000, 1536, 0x3, 0x0, 0x0},
	{18432000, 8000, 2304, 0x3, 0x1, 0x0},
	{11289600, 8000, 1408, 0xb, 0x0, 0x0},
	{16934400, 8000, 2112, 0xb, 0x1, 0x0},
	{12000000, 8000, 1500, 0x3, 0x0, 0x1},

	/* 96k */
	{12288000, 96000, 128, 0x7, 0x0, 0x0},
	{18432000, 96000, 192, 0x7, 0x1, 0x0},
	{12000000, 96000, 125, 0x7, 0x0, 0x1},

	/* 44.1k */
	{11289600, 44100, 256, 0x8, 0x0, 0x0},
	{16934400, 44100, 384, 0x8, 0x1, 0x0},
	{12000000, 44100, 272, 0x8, 0x1, 0x1},

	/* 88.2k */
	{11289600, 88200, 128, 0xf, 0x0, 0x0},
	{16934400, 88200, 192, 0xf, 0x1, 0x0},
	{12000000, 88200, 136, 0xf, 0x1, 0x1},
};

static inline int get_coeff(int mclk, int rate)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
		if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
			return i;
	}
	return i;
}

static int ssm2602_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
{
	u16 srate;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
	u16 iface = snd_soc_read(codec, SSM2602_IFACE) & 0xfff3;
	int i = get_coeff(ssm2602->sysclk, params_rate(params));

	if (substream == ssm2602->slave_substream) {
		dev_dbg(codec->dev, "Ignoring hw_params for slave substream\n");
		return 0;
	}

	/*no match is found*/
	if (i == ARRAY_SIZE(coeff_div))
		return -EINVAL;

	srate = (coeff_div[i].sr << 2) |
		(coeff_div[i].bosr << 1) | coeff_div[i].usb;

	snd_soc_write(codec, SSM2602_ACTIVE, 0);
	snd_soc_write(codec, SSM2602_SRATE, srate);

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x0004;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x0008;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x000c;
		break;
	}
	snd_soc_write(codec, SSM2602_IFACE, iface);
	snd_soc_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
	return 0;
}

static int ssm2602_startup(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
	struct i2c_client *i2c = codec->control_data;
	struct snd_pcm_runtime *master_runtime;

	/* The DAI has shared clocks so if we already have a playback or
	 * capture going then constrain this substream to match it.
	 * TODO: the ssm2602 allows pairs of non-matching PB/REC rates
	 */
	if (ssm2602->master_substream) {
		master_runtime = ssm2602->master_substream->runtime;
		dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
			master_runtime->sample_bits,
			master_runtime->rate);

		if (master_runtime->rate != 0)
			snd_pcm_hw_constraint_minmax(substream->runtime,
						     SNDRV_PCM_HW_PARAM_RATE,
						     master_runtime->rate,
						     master_runtime->rate);

		if (master_runtime->sample_bits != 0)
			snd_pcm_hw_constraint_minmax(substream->runtime,
						     SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
						     master_runtime->sample_bits,
						     master_runtime->sample_bits);

		ssm2602->slave_substream = substream;
	} else
		ssm2602->master_substream = substream;

	return 0;
}

static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	/* set active */
	snd_soc_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);

	return 0;
}

static void ssm2602_shutdown(struct snd_pcm_substream *substream,
			     struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);

	/* deactivate */
	if (!codec->active)
		snd_soc_write(codec, SSM2602_ACTIVE, 0);

	if (ssm2602->master_substream == substream)
		ssm2602->master_substream = ssm2602->slave_substream;

	ssm2602->slave_substream = NULL;
}

static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	u16 mute_reg = snd_soc_read(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
	if (mute)
		snd_soc_write(codec, SSM2602_APDIGI,
				mute_reg | APDIGI_ENABLE_DAC_MUTE);
	else
		snd_soc_write(codec, SSM2602_APDIGI, mute_reg);
	return 0;
}

static int ssm2602_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;
	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
	switch (freq) {
	case 11289600:
	case 12000000:
	case 12288000:
	case 16934400:
	case 18432000:
		ssm2602->sysclk = freq;
		return 0;
	}
	return -EINVAL;
}

static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 iface = 0;

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		iface |= 0x0040;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x0002;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x0001;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		iface |= 0x0013;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		iface |= 0x0003;
		break;
	default:
		return -EINVAL;
	}

	/* clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x0090;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x0080;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x0010;
		break;
	default:
		return -EINVAL;
	}

	/* set iface */
	snd_soc_write(codec, SSM2602_IFACE, iface);
	return 0;
}

static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	u16 reg = snd_soc_read(codec, SSM2602_PWR) & 0xff7f;

	switch (level) {
	case SND_SOC_BIAS_ON:
		/* vref/mid, osc on, dac unmute */
		snd_soc_write(codec, SSM2602_PWR, reg);
		break;
	case SND_SOC_BIAS_PREPARE:
		break;
	case SND_SOC_BIAS_STANDBY:
		/* everything off except vref/vmid, */
		snd_soc_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
		break;
	case SND_SOC_BIAS_OFF:
		/* everything off, dac mute, inactive */
		snd_soc_write(codec, SSM2602_ACTIVE, 0);
		snd_soc_write(codec, SSM2602_PWR, 0xffff);
		break;

	}
	codec->dapm.bias_level = level;
	return 0;
}

#define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
		SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)

#define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_ops ssm2602_dai_ops = {
	.startup	= ssm2602_startup,
	.prepare	= ssm2602_pcm_prepare,
	.hw_params	= ssm2602_hw_params,
	.shutdown	= ssm2602_shutdown,
	.digital_mute	= ssm2602_mute,
	.set_sysclk	= ssm2602_set_dai_sysclk,
	.set_fmt	= ssm2602_set_dai_fmt,
};

static struct snd_soc_dai_driver ssm2602_dai = {
	.name = "ssm2602-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SSM2602_RATES,
		.formats = SSM2602_FORMATS,},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SSM2602_RATES,
		.formats = SSM2602_FORMATS,},
	.ops = &ssm2602_dai_ops,
};

static int ssm2602_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
	ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static int ssm2602_resume(struct snd_soc_codec *codec)
{
	snd_soc_cache_sync(codec);

	ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	return 0;
}

static int ssm2602_probe(struct snd_soc_codec *codec)
{
	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
	int ret = 0, reg;

	pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);

	ret = snd_soc_codec_set_cache_io(codec, 7, 9, ssm2602->control_type);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	ret = ssm2602_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
		return ret;
	}

	/*power on device*/
	snd_soc_write(codec, SSM2602_ACTIVE, 0);
	/* set the update bits */
	reg = snd_soc_read(codec, SSM2602_LINVOL);
	snd_soc_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
	reg = snd_soc_read(codec, SSM2602_RINVOL);
	snd_soc_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
	reg = snd_soc_read(codec, SSM2602_LOUT1V);
	snd_soc_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
	reg = snd_soc_read(codec, SSM2602_ROUT1V);
	snd_soc_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
	/*select Line in as default input*/
	snd_soc_write(codec, SSM2602_APANA, APANA_SELECT_DAC |
			APANA_ENABLE_MIC_BOOST);
	snd_soc_write(codec, SSM2602_PWR, 0);

	snd_soc_add_controls(codec, ssm2602_snd_controls,
				ARRAY_SIZE(ssm2602_snd_controls));
	ssm2602_add_widgets(codec);

	return 0;
}

/* remove everything here */
static int ssm2602_remove(struct snd_soc_codec *codec)
{
	ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_ssm2602 = {
	.probe =	ssm2602_probe,
	.remove =	ssm2602_remove,
	.suspend =	ssm2602_suspend,
	.resume =	ssm2602_resume,
	.set_bias_level = ssm2602_set_bias_level,
	.reg_cache_size = sizeof(ssm2602_reg),
	.reg_word_size = sizeof(u16),
	.reg_cache_default = ssm2602_reg,
};

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
 * ssm2602 2 wire address is determined by GPIO5
 * state during powerup.
 *    low  = 0x1a
 *    high = 0x1b
 */
static int ssm2602_i2c_probe(struct i2c_client *i2c,
			     const struct i2c_device_id *id)
{
	struct ssm2602_priv *ssm2602;
	int ret;

	ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
	if (ssm2602 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, ssm2602);
	ssm2602->control_type = SND_SOC_I2C;

	ret = snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_ssm2602, &ssm2602_dai, 1);
	if (ret < 0)
		kfree(ssm2602);
	return ret;
}

static int ssm2602_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	kfree(i2c_get_clientdata(client));
	return 0;
}

static const struct i2c_device_id ssm2602_i2c_id[] = {
	{ "ssm2602", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);

/* corgi i2c codec control layer */
static struct i2c_driver ssm2602_i2c_driver = {
	.driver = {
		.name = "ssm2602",
		.owner = THIS_MODULE,
	},
	.probe = ssm2602_i2c_probe,
	.remove = ssm2602_i2c_remove,
	.id_table = ssm2602_i2c_id,
};
#endif


static int __init ssm2602_modinit(void)
{
	int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&ssm2602_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register SSM2602 I2C driver: %d\n",
		       ret);
	}
#endif
	return ret;
}
module_init(ssm2602_modinit);

static void __exit ssm2602_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&ssm2602_i2c_driver);
#endif
}
module_exit(ssm2602_exit);

MODULE_DESCRIPTION("ASoC ssm2602 driver");
MODULE_AUTHOR("Cliff Cai");
MODULE_LICENSE("GPL");
Commit	Line	Data
b7138212 CC	1	/*
	2	* File: sound/soc/codecs/ssm2602.c
	3	* Author: Cliff Cai <Cliff.Cai@analog.com>
	4	*
	5	* Created: Tue June 06 2008
	6	* Description: Driver for ssm2602 sound chip
	7	*
	8	* Modified:
	9	* Copyright 2008 Analog Devices Inc.
	10	*
	11	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, see the file COPYING, or write
	25	* to the Free Software Foundation, Inc.,
	26	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	27	*/
	28
	29	#include <linux/module.h>
	30	#include <linux/moduleparam.h>
	31	#include <linux/init.h>
	32	#include <linux/delay.h>
	33	#include <linux/pm.h>
	34	#include <linux/i2c.h>
	35	#include <linux/platform_device.h>
5a0e3ad6	36	#include <linux/slab.h>
b7138212 CC	37	#include <sound/core.h>
	38	#include <sound/pcm.h>
	39	#include <sound/pcm_params.h>
	40	#include <sound/soc.h>
b7138212 CC	41	#include <sound/initval.h>
	42
	43	#include "ssm2602.h"
	44
b7138212 CC	45	#define SSM2602_VERSION "0.1"
b7138212 CC	46
b7138212 CC	47	/* codec private data */
	48	struct ssm2602_priv {
	49	unsigned int sysclk;
f0fba2ad	50	enum snd_soc_control_type control_type;
b7138212 CC	51	struct snd_pcm_substream *master_substream;
	52	struct snd_pcm_substream *slave_substream;
	53	};
	54
	55	/*
	56	* ssm2602 register cache
	57	* We can't read the ssm2602 register space when we are
	58	* using 2 wire for device control, so we cache them instead.
	59	* There is no point in caching the reset register
	60	*/
	61	static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
	62	0x0017, 0x0017, 0x0079, 0x0079,
	63	0x0000, 0x0000, 0x0000, 0x000a,
	64	0x0000, 0x0000
	65	};
	66
93547e89	67	#define ssm2602_reset(c) snd_soc_write(c, SSM2602_RESET, 0)
b7138212 CC	68
	69	/Appending several "None"s just for OSS mixer use/
	70	static const char *ssm2602_input_select[] = {
	71	"Line", "Mic", "None", "None", "None",
	72	"None", "None", "None",
	73	};
	74
	75	static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
	76
	77	static const struct soc_enum ssm2602_enum[] = {
	78	SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
	79	SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
	80	};
	81
	82	static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
	83
	84	SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
	85	0, 127, 0),
	86	SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
	87	7, 1, 0),
	88
	89	SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
	90	SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
	91
	92	SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
4b527e29	93	SOC_SINGLE("Mic Boost2 (+20dB)", SSM2602_APANA, 7, 1, 0),
b7138212 CC	94	SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
	95
	96	SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
	97
	98	SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
	99	SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
	100
	101	SOC_ENUM("Capture Source", ssm2602_enum[0]),
	102
	103	SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
	104	};
	105
b7138212 CC	106	/* Output Mixer */
	107	static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
	108	SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
	109	SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
	110	SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
	111	};
	112
	113	/* Input mux */
	114	static const struct snd_kcontrol_new ssm2602_input_mux_controls =
	115	SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
	116
	117	static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
	118	SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
	119	&ssm2602_output_mixer_controls[0],
	120	ARRAY_SIZE(ssm2602_output_mixer_controls)),
	121	SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
	122	SND_SOC_DAPM_OUTPUT("LOUT"),
	123	SND_SOC_DAPM_OUTPUT("LHPOUT"),
	124	SND_SOC_DAPM_OUTPUT("ROUT"),
	125	SND_SOC_DAPM_OUTPUT("RHPOUT"),
	126	SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
	127	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
	128	SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
	129	SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
	130	SND_SOC_DAPM_INPUT("MICIN"),
	131	SND_SOC_DAPM_INPUT("RLINEIN"),
	132	SND_SOC_DAPM_INPUT("LLINEIN"),
	133	};
	134
	135	static const struct snd_soc_dapm_route audio_conn[] = {
	136	/* output mixer */
	137	{"Output Mixer", "Line Bypass Switch", "Line Input"},
	138	{"Output Mixer", "HiFi Playback Switch", "DAC"},
	139	{"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
	140
	141	/* outputs */
	142	{"RHPOUT", NULL, "Output Mixer"},
	143	{"ROUT", NULL, "Output Mixer"},
	144	{"LHPOUT", NULL, "Output Mixer"},
	145	{"LOUT", NULL, "Output Mixer"},
	146
	147	/* input mux */
	148	{"Input Mux", "Line", "Line Input"},
	149	{"Input Mux", "Mic", "Mic Bias"},
	150	{"ADC", NULL, "Input Mux"},
	151
	152	/* inputs */
	153	{"Line Input", NULL, "LLINEIN"},
	154	{"Line Input", NULL, "RLINEIN"},
	155	{"Mic Bias", NULL, "MICIN"},
	156	};
	157
	158	static int ssm2602_add_widgets(struct snd_soc_codec *codec)
	159	{
ce6120cc	160	struct snd_soc_dapm_context *dapm = &codec->dapm;
b7138212	161
ce6120cc LG	162	snd_soc_dapm_new_controls(dapm, ssm2602_dapm_widgets,
	163	ARRAY_SIZE(ssm2602_dapm_widgets));
	164	snd_soc_dapm_add_routes(dapm, audio_conn, ARRAY_SIZE(audio_conn));
b7138212	165
b7138212 CC	166	return 0;
	167	}
	168
	169	struct _coeff_div {
	170	u32 mclk;
	171	u32 rate;
	172	u16 fs;
	173	u8 sr:4;
	174	u8 bosr:1;
	175	u8 usb:1;
	176	};
	177
	178	/* codec mclk clock divider coefficients */
	179	static const struct _coeff_div coeff_div[] = {
	180	/* 48k */
	181	{12288000, 48000, 256, 0x0, 0x0, 0x0},
	182	{18432000, 48000, 384, 0x0, 0x1, 0x0},
	183	{12000000, 48000, 250, 0x0, 0x0, 0x1},
	184
	185	/* 32k */
	186	{12288000, 32000, 384, 0x6, 0x0, 0x0},
	187	{18432000, 32000, 576, 0x6, 0x1, 0x0},
	188	{12000000, 32000, 375, 0x6, 0x0, 0x1},
	189
	190	/* 8k */
	191	{12288000, 8000, 1536, 0x3, 0x0, 0x0},
	192	{18432000, 8000, 2304, 0x3, 0x1, 0x0},
	193	{11289600, 8000, 1408, 0xb, 0x0, 0x0},
	194	{16934400, 8000, 2112, 0xb, 0x1, 0x0},
	195	{12000000, 8000, 1500, 0x3, 0x0, 0x1},
	196
	197	/* 96k */
	198	{12288000, 96000, 128, 0x7, 0x0, 0x0},
	199	{18432000, 96000, 192, 0x7, 0x1, 0x0},
	200	{12000000, 96000, 125, 0x7, 0x0, 0x1},
	201
	202	/* 44.1k */
	203	{11289600, 44100, 256, 0x8, 0x0, 0x0},
	204	{16934400, 44100, 384, 0x8, 0x1, 0x0},
	205	{12000000, 44100, 272, 0x8, 0x1, 0x1},
	206
	207	/* 88.2k */
	208	{11289600, 88200, 128, 0xf, 0x0, 0x0},
	209	{16934400, 88200, 192, 0xf, 0x1, 0x0},
	210	{12000000, 88200, 136, 0xf, 0x1, 0x1},
	211	};
	212
	213	static inline int get_coeff(int mclk, int rate)
	214	{
	215	int i;
	216
	217	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
	218	if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
	219	return i;
	220	}
	221	return i;
	222	}
	223
	224	static int ssm2602_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	225	struct snd_pcm_hw_params *params,
dee89c4d MB	226	struct snd_soc_dai *dai)
b7138212 CC	227	{
	228	u16 srate;
	229	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	230	struct snd_soc_codec *codec = rtd->codec;
b2c812e2	231	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
93547e89	232	u16 iface = snd_soc_read(codec, SSM2602_IFACE) & 0xfff3;
b7138212 CC	233	int i = get_coeff(ssm2602->sysclk, params_rate(params));
b7138212 CC	234
faab5a32	235	if (substream == ssm2602->slave_substream) {
93547e89	236	dev_dbg(codec->dev, "Ignoring hw_params for slave substream\n");
faab5a32 KB	237	return 0;
	238	}
	239
b7138212 CC	240	/no match is found/
	241	if (i == ARRAY_SIZE(coeff_div))
	242	return -EINVAL;
	243
	244	srate = (coeff_div[i].sr << 2) \|
	245	(coeff_div[i].bosr << 1) \| coeff_div[i].usb;
	246
93547e89 CC	247	snd_soc_write(codec, SSM2602_ACTIVE, 0);
93547e89 CC	248	snd_soc_write(codec, SSM2602_SRATE, srate);
b7138212 CC	249
	250	/* bit size */
	251	switch (params_format(params)) {
	252	case SNDRV_PCM_FORMAT_S16_LE:
	253	break;
	254	case SNDRV_PCM_FORMAT_S20_3LE:
	255	iface \|= 0x0004;
	256	break;
	257	case SNDRV_PCM_FORMAT_S24_LE:
	258	iface \|= 0x0008;
	259	break;
	260	case SNDRV_PCM_FORMAT_S32_LE:
	261	iface \|= 0x000c;
	262	break;
	263	}
93547e89 CC	264	snd_soc_write(codec, SSM2602_IFACE, iface);
93547e89 CC	265	snd_soc_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
b7138212 CC	266	return 0;
	267	}
	268
dee89c4d MB	269	static int ssm2602_startup(struct snd_pcm_substream *substream,
dee89c4d MB	270	struct snd_soc_dai *dai)
b7138212 CC	271	{
b7138212 CC	272	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	273	struct snd_soc_codec *codec = rtd->codec;
b2c812e2	274	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
faab5a32	275	struct i2c_client *i2c = codec->control_data;
b7138212 CC	276	struct snd_pcm_runtime *master_runtime;
	277
	278	/* The DAI has shared clocks so if we already have a playback or
	279	* capture going then constrain this substream to match it.
faab5a32	280	* TODO: the ssm2602 allows pairs of non-matching PB/REC rates
b7138212 CC	281	*/
	282	if (ssm2602->master_substream) {
	283	master_runtime = ssm2602->master_substream->runtime;
faab5a32 KB	284	dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
	285	master_runtime->sample_bits,
	286	master_runtime->rate);
	287
f692fce0 CC	288	if (master_runtime->rate != 0)
	289	snd_pcm_hw_constraint_minmax(substream->runtime,
	290	SNDRV_PCM_HW_PARAM_RATE,
	291	master_runtime->rate,
	292	master_runtime->rate);
	293
	294	if (master_runtime->sample_bits != 0)
	295	snd_pcm_hw_constraint_minmax(substream->runtime,
	296	SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
	297	master_runtime->sample_bits,
	298	master_runtime->sample_bits);
b7138212 CC	299
	300	ssm2602->slave_substream = substream;
	301	} else
	302	ssm2602->master_substream = substream;
	303
	304	return 0;
	305	}
	306
dee89c4d MB	307	static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
dee89c4d MB	308	struct snd_soc_dai *dai)
b7138212 CC	309	{
b7138212 CC	310	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	311	struct snd_soc_codec *codec = rtd->codec;
b7138212	312	/* set active */
93547e89	313	snd_soc_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
b7138212 CC	314
	315	return 0;
	316	}
	317
dee89c4d MB	318	static void ssm2602_shutdown(struct snd_pcm_substream *substream,
dee89c4d MB	319	struct snd_soc_dai *dai)
b7138212 CC	320	{
b7138212 CC	321	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	322	struct snd_soc_codec *codec = rtd->codec;
b2c812e2	323	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
f692fce0	324
b7138212 CC	325	/* deactivate */
b7138212 CC	326	if (!codec->active)
93547e89	327	snd_soc_write(codec, SSM2602_ACTIVE, 0);
faab5a32 KB	328
	329	if (ssm2602->master_substream == substream)
	330	ssm2602->master_substream = ssm2602->slave_substream;
	331
	332	ssm2602->slave_substream = NULL;
b7138212 CC	333	}
	334
	335	static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
	336	{
	337	struct snd_soc_codec *codec = dai->codec;
93547e89	338	u16 mute_reg = snd_soc_read(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
b7138212	339	if (mute)
93547e89	340	snd_soc_write(codec, SSM2602_APDIGI,
b7138212 CC	341	mute_reg \| APDIGI_ENABLE_DAC_MUTE);
b7138212 CC	342	else
93547e89	343	snd_soc_write(codec, SSM2602_APDIGI, mute_reg);
b7138212 CC	344	return 0;
	345	}
	346
	347	static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	348	int clk_id, unsigned int freq, int dir)
	349	{
	350	struct snd_soc_codec *codec = codec_dai->codec;
b2c812e2	351	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
b7138212 CC	352	switch (freq) {
	353	case 11289600:
	354	case 12000000:
	355	case 12288000:
	356	case 16934400:
	357	case 18432000:
	358	ssm2602->sysclk = freq;
	359	return 0;
	360	}
	361	return -EINVAL;
	362	}
	363
	364	static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
	365	unsigned int fmt)
	366	{
	367	struct snd_soc_codec *codec = codec_dai->codec;
	368	u16 iface = 0;
	369
	370	/* set master/slave audio interface */
	371	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	372	case SND_SOC_DAIFMT_CBM_CFM:
	373	iface \|= 0x0040;
	374	break;
	375	case SND_SOC_DAIFMT_CBS_CFS:
	376	break;
	377	default:
	378	return -EINVAL;
	379	}
	380
	381	/* interface format */
	382	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	383	case SND_SOC_DAIFMT_I2S:
	384	iface \|= 0x0002;
	385	break;
	386	case SND_SOC_DAIFMT_RIGHT_J:
	387	break;
	388	case SND_SOC_DAIFMT_LEFT_J:
	389	iface \|= 0x0001;
	390	break;
	391	case SND_SOC_DAIFMT_DSP_A:
c6913485	392	iface \|= 0x0013;
b7138212 CC	393	break;
b7138212 CC	394	case SND_SOC_DAIFMT_DSP_B:
c6913485	395	iface \|= 0x0003;
b7138212 CC	396	break;
	397	default:
	398	return -EINVAL;
	399	}
	400
	401	/* clock inversion */
	402	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	403	case SND_SOC_DAIFMT_NB_NF:
	404	break;
	405	case SND_SOC_DAIFMT_IB_IF:
	406	iface \|= 0x0090;
	407	break;
	408	case SND_SOC_DAIFMT_IB_NF:
	409	iface \|= 0x0080;
	410	break;
	411	case SND_SOC_DAIFMT_NB_IF:
	412	iface \|= 0x0010;
	413	break;
	414	default:
	415	return -EINVAL;
	416	}
	417
	418	/* set iface */
93547e89	419	snd_soc_write(codec, SSM2602_IFACE, iface);
b7138212 CC	420	return 0;
	421	}
	422
	423	static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
	424	enum snd_soc_bias_level level)
	425	{
93547e89	426	u16 reg = snd_soc_read(codec, SSM2602_PWR) & 0xff7f;
b7138212 CC	427
	428	switch (level) {
	429	case SND_SOC_BIAS_ON:
	430	/* vref/mid, osc on, dac unmute */
93547e89	431	snd_soc_write(codec, SSM2602_PWR, reg);
b7138212 CC	432	break;
	433	case SND_SOC_BIAS_PREPARE:
	434	break;
	435	case SND_SOC_BIAS_STANDBY:
	436	/* everything off except vref/vmid, */
93547e89	437	snd_soc_write(codec, SSM2602_PWR, reg \| PWR_CLK_OUT_PDN);
b7138212 CC	438	break;
	439	case SND_SOC_BIAS_OFF:
	440	/* everything off, dac mute, inactive */
93547e89 CC	441	snd_soc_write(codec, SSM2602_ACTIVE, 0);
93547e89 CC	442	snd_soc_write(codec, SSM2602_PWR, 0xffff);
b7138212 CC	443	break;
	444
	445	}
ce6120cc	446	codec->dapm.bias_level = level;
b7138212 CC	447	return 0;
	448	}
	449
2552a710 CC	450	#define SSM2602_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_32000 \|\
	451	SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|\
	452	SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
b7138212	453
5de27b6c KB	454	#define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	455	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	456
6335d055 EM	457	static struct snd_soc_dai_ops ssm2602_dai_ops = {
	458	.startup = ssm2602_startup,
	459	.prepare = ssm2602_pcm_prepare,
	460	.hw_params = ssm2602_hw_params,
	461	.shutdown = ssm2602_shutdown,
	462	.digital_mute = ssm2602_mute,
	463	.set_sysclk = ssm2602_set_dai_sysclk,
	464	.set_fmt = ssm2602_set_dai_fmt,
	465	};
	466
f0fba2ad LG	467	static struct snd_soc_dai_driver ssm2602_dai = {
f0fba2ad LG	468	.name = "ssm2602-hifi",
b7138212 CC	469	.playback = {
	470	.stream_name = "Playback",
	471	.channels_min = 2,
	472	.channels_max = 2,
	473	.rates = SSM2602_RATES,
5de27b6c	474	.formats = SSM2602_FORMATS,},
b7138212 CC	475	.capture = {
	476	.stream_name = "Capture",
	477	.channels_min = 2,
	478	.channels_max = 2,
	479	.rates = SSM2602_RATES,
5de27b6c	480	.formats = SSM2602_FORMATS,},
6335d055	481	.ops = &ssm2602_dai_ops,
b7138212	482	};
b7138212	483
f0fba2ad	484	static int ssm2602_suspend(struct snd_soc_codec *codec, pm_message_t state)
b7138212	485	{
b7138212 CC	486	ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
	487	return 0;
	488	}
	489
f0fba2ad	490	static int ssm2602_resume(struct snd_soc_codec *codec)
b7138212	491	{
93547e89 CC	492	snd_soc_cache_sync(codec);
93547e89 CC	493
b7138212	494	ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
93547e89	495
b7138212 CC	496	return 0;
	497	}
	498
f0fba2ad	499	static int ssm2602_probe(struct snd_soc_codec *codec)
b7138212	500	{
f0fba2ad LG	501	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
	502	int ret = 0, reg;
	503
	504	pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
	505
93547e89 CC	506	ret = snd_soc_codec_set_cache_io(codec, 7, 9, ssm2602->control_type);
	507	if (ret < 0) {
	508	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
	509	return ret;
	510	}
b7138212	511
93547e89 CC	512	ret = ssm2602_reset(codec);
	513	if (ret < 0) {
	514	dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
	515	return ret;
	516	}
b7138212	517
b7138212	518	/power on device/
93547e89	519	snd_soc_write(codec, SSM2602_ACTIVE, 0);
b7138212	520	/* set the update bits */
93547e89 CC	521	reg = snd_soc_read(codec, SSM2602_LINVOL);
	522	snd_soc_write(codec, SSM2602_LINVOL, reg \| LINVOL_LRIN_BOTH);
	523	reg = snd_soc_read(codec, SSM2602_RINVOL);
	524	snd_soc_write(codec, SSM2602_RINVOL, reg \| RINVOL_RLIN_BOTH);
	525	reg = snd_soc_read(codec, SSM2602_LOUT1V);
	526	snd_soc_write(codec, SSM2602_LOUT1V, reg \| LOUT1V_LRHP_BOTH);
	527	reg = snd_soc_read(codec, SSM2602_ROUT1V);
	528	snd_soc_write(codec, SSM2602_ROUT1V, reg \| ROUT1V_RLHP_BOTH);
b7138212	529	/select Line in as default input/
93547e89	530	snd_soc_write(codec, SSM2602_APANA, APANA_SELECT_DAC \|
b7138212	531	APANA_ENABLE_MIC_BOOST);
93547e89	532	snd_soc_write(codec, SSM2602_PWR, 0);
b7138212	533
3e8e1952 IM	534	snd_soc_add_controls(codec, ssm2602_snd_controls,
3e8e1952 IM	535	ARRAY_SIZE(ssm2602_snd_controls));
b7138212	536	ssm2602_add_widgets(codec);
b7138212	537
93547e89	538	return 0;
f0fba2ad	539	}
b7138212	540
f0fba2ad LG	541	/* remove everything here */
	542	static int ssm2602_remove(struct snd_soc_codec *codec)
	543	{
	544	ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
	545	return 0;
b7138212 CC	546	}
b7138212 CC	547
f0fba2ad LG	548	static struct snd_soc_codec_driver soc_codec_dev_ssm2602 = {
	549	.probe = ssm2602_probe,
	550	.remove = ssm2602_remove,
	551	.suspend = ssm2602_suspend,
	552	.resume = ssm2602_resume,
f0fba2ad LG	553	.set_bias_level = ssm2602_set_bias_level,
	554	.reg_cache_size = sizeof(ssm2602_reg),
	555	.reg_word_size = sizeof(u16),
	556	.reg_cache_default = ssm2602_reg,
	557	};
b7138212 CC	558
	559	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	560	/*
	561	* ssm2602 2 wire address is determined by GPIO5
	562	* state during powerup.
	563	* low = 0x1a
	564	* high = 0x1b
	565	*/
	566	static int ssm2602_i2c_probe(struct i2c_client *i2c,
	567	const struct i2c_device_id *id)
	568	{
f0fba2ad	569	struct ssm2602_priv *ssm2602;
b7138212 CC	570	int ret;
b7138212 CC	571
f0fba2ad LG	572	ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
	573	if (ssm2602 == NULL)
	574	return -ENOMEM;
b7138212	575
f0fba2ad	576	i2c_set_clientdata(i2c, ssm2602);
f0fba2ad	577	ssm2602->control_type = SND_SOC_I2C;
b7138212	578
f0fba2ad LG	579	ret = snd_soc_register_codec(&i2c->dev,
	580	&soc_codec_dev_ssm2602, &ssm2602_dai, 1);
	581	if (ret < 0)
	582	kfree(ssm2602);
b7138212 CC	583	return ret;
	584	}
	585
	586	static int ssm2602_i2c_remove(struct i2c_client *client)
	587	{
f0fba2ad LG	588	snd_soc_unregister_codec(&client->dev);
f0fba2ad LG	589	kfree(i2c_get_clientdata(client));
b7138212 CC	590	return 0;
	591	}
	592
	593	static const struct i2c_device_id ssm2602_i2c_id[] = {
	594	{ "ssm2602", 0 },
	595	{ }
	596	};
	597	MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
f0fba2ad	598
b7138212 CC	599	/* corgi i2c codec control layer */
	600	static struct i2c_driver ssm2602_i2c_driver = {
	601	.driver = {
2a161018	602	.name = "ssm2602",
b7138212 CC	603	.owner = THIS_MODULE,
	604	},
	605	.probe = ssm2602_i2c_probe,
	606	.remove = ssm2602_i2c_remove,
	607	.id_table = ssm2602_i2c_id,
	608	};
b7138212 CC	609	#endif
b7138212 CC	610
f0fba2ad LG	611
f0fba2ad LG	612	static int __init ssm2602_modinit(void)
b7138212	613	{
b7138212	614	int ret = 0;
b7138212	615	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad LG	616	ret = i2c_add_driver(&ssm2602_i2c_driver);
	617	if (ret != 0) {
	618	printk(KERN_ERR "Failed to register SSM2602 I2C driver: %d\n",
	619	ret);
b7138212	620	}
b7138212 CC	621	#endif
	622	return ret;
	623	}
f0fba2ad	624	module_init(ssm2602_modinit);
b7138212	625
f0fba2ad	626	static void __exit ssm2602_exit(void)
b7138212	627	{
b7138212	628	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
b7138212 CC	629	i2c_del_driver(&ssm2602_i2c_driver);
b7138212 CC	630	#endif
64089b84 MB	631	}
	632	module_exit(ssm2602_exit);
	633
b7138212 CC	634	MODULE_DESCRIPTION("ASoC ssm2602 driver");
	635	MODULE_AUTHOR("Cliff Cai");
	636	MODULE_LICENSE("GPL");