Release 4.7 sound/soc/codecs/cs35l32.c

/*
 * cs35l32.c -- CS35L32 ALSA SoC audio driver
 *
 * Copyright 2014 CirrusLogic, Inc.
 *
 * Author: Brian Austin <brian.austin@cirrus.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.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio/consumer.h>
#include <linux/of_device.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 <sound/tlv.h>
#include <dt-bindings/sound/cs35l32.h>

#include "cs35l32.h"


#define CS35L32_NUM_SUPPLIES 2

static const char *const cs35l32_supply_names[CS35L32_NUM_SUPPLIES] = {
	"VA",
	"VP",
};


struct  cs35l32_private {
	
struct regmap *regmap;
	
struct snd_soc_codec *codec;
	
struct regulator_bulk_data supplies[CS35L32_NUM_SUPPLIES];
	
struct cs35l32_platform_data pdata;
	
struct gpio_desc *reset_gpio;
};


static const struct reg_default cs35l32_reg_defaults[] = {

	{ 0x06, 0x04 }, /* Power Ctl 1 */
	{ 0x07, 0xE8 }, /* Power Ctl 2 */
	{ 0x08, 0x40 }, /* Clock Ctl */
	{ 0x09, 0x20 }, /* Low Battery Threshold */
	{ 0x0A, 0x00 }, /* Voltage Monitor [RO] */
	{ 0x0B, 0x40 }, /* Conv Peak Curr Protection CTL */
	{ 0x0C, 0x07 }, /* IMON Scaling */
	{ 0x0D, 0x03 }, /* Audio/LED Pwr Manager */
	{ 0x0F, 0x20 }, /* Serial Port Control */
	{ 0x10, 0x14 }, /* Class D Amp CTL */
	{ 0x11, 0x00 }, /* Protection Release CTL */
	{ 0x12, 0xFF }, /* Interrupt Mask 1 */
	{ 0x13, 0xFF }, /* Interrupt Mask 2 */
	{ 0x14, 0xFF }, /* Interrupt Mask 3 */
	{ 0x19, 0x00 }, /* LED Flash Mode Current */
	{ 0x1A, 0x00 }, /* LED Movie Mode Current */
	{ 0x1B, 0x20 }, /* LED Flash Timer */
	{ 0x1C, 0x00 }, /* LED Flash Inhibit Current */
};



static bool cs35l32_readable_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case CS35L32_DEVID_AB ... CS35L32_AUDIO_LED_MNGR:
	case CS35L32_ADSP_CTL ... CS35L32_FLASH_INHIBIT:
		return true;
	default:
		return false;
	}
}

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static bool cs35l32_volatile_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case CS35L32_DEVID_AB ... CS35L32_REV_ID:
	case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS:
		return true;
	default:
		return false;
	}
}

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static bool cs35l32_precious_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS:
		return true;
	default:
		return false;
	}
}

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static DECLARE_TLV_DB_SCALE(classd_ctl_tlv, 900, 300, 0);


static const struct snd_kcontrol_new imon_ctl =
	SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 6, 1, 1);


static const struct snd_kcontrol_new vmon_ctl =
	SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 7, 1, 1);


static const struct snd_kcontrol_new vpmon_ctl =
	SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 5, 1, 1);


static const struct snd_kcontrol_new cs35l32_snd_controls[] = {
	SOC_SINGLE_TLV("Speaker Volume", CS35L32_CLASSD_CTL,
		       3, 0x04, 1, classd_ctl_tlv),
	SOC_SINGLE("Zero Cross Switch", CS35L32_CLASSD_CTL, 2, 1, 0),
	SOC_SINGLE("Gain Manager Switch", CS35L32_AUDIO_LED_MNGR, 3, 1, 0),
};


static const struct snd_soc_dapm_widget cs35l32_dapm_widgets[] = {

	SND_SOC_DAPM_SUPPLY("BOOST", CS35L32_PWRCTL1, 2, 1, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("Speaker", CS35L32_PWRCTL1, 7, 1, NULL, 0),

	SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L32_PWRCTL2, 3, 1),

	SND_SOC_DAPM_INPUT("VP"),
	SND_SOC_DAPM_INPUT("ISENSE"),
	SND_SOC_DAPM_INPUT("VSENSE"),

	SND_SOC_DAPM_SWITCH("VMON ADC", CS35L32_PWRCTL2, 7, 1, &vmon_ctl),
	SND_SOC_DAPM_SWITCH("IMON ADC", CS35L32_PWRCTL2, 6, 1, &imon_ctl),
	SND_SOC_DAPM_SWITCH("VPMON ADC", CS35L32_PWRCTL2, 5, 1, &vpmon_ctl),
};


static const struct snd_soc_dapm_route cs35l32_audio_map[] = {

	{"Speaker", NULL, "BOOST"},

	{"VMON ADC", NULL, "VSENSE"},
	{"IMON ADC", NULL, "ISENSE"},
	{"VPMON ADC", NULL, "VP"},

	{"SDOUT", "Switch", "VMON ADC"},
	{"SDOUT",  "Switch", "IMON ADC"},
	{"SDOUT", "Switch", "VPMON ADC"},

	{"Capture", NULL, "SDOUT"},
};



static int cs35l32_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		snd_soc_update_bits(codec, CS35L32_ADSP_CTL,
				    CS35L32_ADSP_MASTER_MASK,
				CS35L32_ADSP_MASTER_MASK);
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		snd_soc_update_bits(codec, CS35L32_ADSP_CTL,
				    CS35L32_ADSP_MASTER_MASK, 0);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

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static int cs35l32_set_tristate(struct snd_soc_dai *dai, int tristate)
{
	struct snd_soc_codec *codec = dai->codec;

	return snd_soc_update_bits(codec, CS35L32_PWRCTL2,
					CS35L32_SDOUT_3ST, tristate << 3);
}

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static const struct snd_soc_dai_ops cs35l32_ops = {
	.set_fmt = cs35l32_set_dai_fmt,
	.set_tristate = cs35l32_set_tristate,
};


static struct snd_soc_dai_driver cs35l32_dai[] = {
	{
		.name = "cs35l32-monitor",
		.id = 0,
		.capture = {
			.stream_name = "Capture",
			.channels_min = 2,
			.channels_max = 2,
			.rates = CS35L32_RATES,
			.formats = CS35L32_FORMATS,
                },
		.ops = &cs35l32_ops,
		.symmetric_rates = 1,
        }
};



static int cs35l32_codec_set_sysclk(struct snd_soc_codec *codec,
			      int clk_id, int source, unsigned int freq, int dir)
{
	unsigned int val;

	switch (freq) {
	case 6000000:
		val = CS35L32_MCLK_RATIO;
		break;
	case 12000000:
		val = CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO;
		break;
	case 6144000:
		val = 0;
		break;
	case 12288000:
		val = CS35L32_MCLK_DIV2_MASK;
		break;
	default:
		return -EINVAL;
	}

	return snd_soc_update_bits(codec, CS35L32_CLK_CTL,
			CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO_MASK, val);
}

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static const struct snd_soc_codec_driver soc_codec_dev_cs35l32 = {
	.set_sysclk = cs35l32_codec_set_sysclk,

	.dapm_widgets = cs35l32_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(cs35l32_dapm_widgets),
	.dapm_routes = cs35l32_audio_map,
	.num_dapm_routes = ARRAY_SIZE(cs35l32_audio_map),

	.controls = cs35l32_snd_controls,
	.num_controls = ARRAY_SIZE(cs35l32_snd_controls),
};

/* Current and threshold powerup sequence Pg37 in datasheet */

static const struct reg_sequence cs35l32_monitor_patch[] = {

	{ 0x00, 0x99 },
	{ 0x48, 0x17 },
	{ 0x49, 0x56 },
	{ 0x43, 0x01 },
	{ 0x3B, 0x62 },
	{ 0x3C, 0x80 },
	{ 0x00, 0x00 },
};


static const struct regmap_config cs35l32_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = CS35L32_MAX_REGISTER,
	.reg_defaults = cs35l32_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(cs35l32_reg_defaults),
	.volatile_reg = cs35l32_volatile_register,
	.readable_reg = cs35l32_readable_register,
	.precious_reg = cs35l32_precious_register,
	.cache_type = REGCACHE_RBTREE,
};



static int cs35l32_handle_of_data(struct i2c_client *i2c_client,
				    struct cs35l32_platform_data *pdata)
{
	struct device_node *np = i2c_client->dev.of_node;
	unsigned int val;

	if (of_property_read_u32(np, "cirrus,sdout-share", &val) >= 0)
		pdata->sdout_share = val;

	if (of_property_read_u32(np, "cirrus,boost-manager", &val))
		val = -1u;

	switch (val) {
	case CS35L32_BOOST_MGR_AUTO:
	case CS35L32_BOOST_MGR_AUTO_AUDIO:
	case CS35L32_BOOST_MGR_BYPASS:
	case CS35L32_BOOST_MGR_FIXED:
		pdata->boost_mng = val;
		break;
	case -1u:
	default:
		dev_err(&i2c_client->dev,
			"Wrong cirrus,boost-manager DT value %d\n", val);
		pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS;
	}

	if (of_property_read_u32(np, "cirrus,sdout-datacfg", &val))
		val = -1u;
	switch (val) {
	case CS35L32_DATA_CFG_LR_VP:
	case CS35L32_DATA_CFG_LR_STAT:
	case CS35L32_DATA_CFG_LR:
	case CS35L32_DATA_CFG_LR_VPSTAT:
		pdata->sdout_datacfg = val;
		break;
	case -1u:
	default:
		dev_err(&i2c_client->dev,
			"Wrong cirrus,sdout-datacfg DT value %d\n", val);
		pdata->sdout_datacfg = CS35L32_DATA_CFG_LR;
	}

	if (of_property_read_u32(np, "cirrus,battery-threshold", &val))
		val = -1u;
	switch (val) {
	case CS35L32_BATT_THRESH_3_1V:
	case CS35L32_BATT_THRESH_3_2V:
	case CS35L32_BATT_THRESH_3_3V:
	case CS35L32_BATT_THRESH_3_4V:
		pdata->batt_thresh = val;
		break;
	case -1u:
	default:
		dev_err(&i2c_client->dev,
			"Wrong cirrus,battery-threshold DT value %d\n", val);
		pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V;
	}

	if (of_property_read_u32(np, "cirrus,battery-recovery", &val))
		val = -1u;
	switch (val) {
	case CS35L32_BATT_RECOV_3_1V:
	case CS35L32_BATT_RECOV_3_2V:
	case CS35L32_BATT_RECOV_3_3V:
	case CS35L32_BATT_RECOV_3_4V:
	case CS35L32_BATT_RECOV_3_5V:
	case CS35L32_BATT_RECOV_3_6V:
		pdata->batt_recov = val;
		break;
	case -1u:
	default:
		dev_err(&i2c_client->dev,
			"Wrong cirrus,battery-recovery DT value %d\n", val);
		pdata->batt_recov = CS35L32_BATT_RECOV_3_4V;
	}

	return 0;
}

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static int cs35l32_i2c_probe(struct i2c_client *i2c_client,
				       const struct i2c_device_id *id)
{
	struct cs35l32_private *cs35l32;
	struct cs35l32_platform_data *pdata =
		dev_get_platdata(&i2c_client->dev);
	int ret, i;
	unsigned int devid = 0;
	unsigned int reg;


	cs35l32 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs35l32_private),
			       GFP_KERNEL);
	if (!cs35l32) {
		dev_err(&i2c_client->dev, "could not allocate codec\n");
		return -ENOMEM;
	}

	i2c_set_clientdata(i2c_client, cs35l32);

	cs35l32->regmap = devm_regmap_init_i2c(i2c_client, &cs35l32_regmap);
	if (IS_ERR(cs35l32->regmap)) {
		ret = PTR_ERR(cs35l32->regmap);
		dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
		return ret;
	}

	if (pdata) {
		cs35l32->pdata = *pdata;
	} else {
		pdata = devm_kzalloc(&i2c_client->dev,
				     sizeof(struct cs35l32_platform_data),
				GFP_KERNEL);
		if (!pdata) {
			dev_err(&i2c_client->dev, "could not allocate pdata\n");
			return -ENOMEM;
		}
		if (i2c_client->dev.of_node) {
			ret = cs35l32_handle_of_data(i2c_client,
						     &cs35l32->pdata);
			if (ret != 0)
				return ret;
		}
	}

	for (i = 0; i < ARRAY_SIZE(cs35l32->supplies); i++)
		cs35l32->supplies[i].supply = cs35l32_supply_names[i];

	ret = devm_regulator_bulk_get(&i2c_client->dev,
				      ARRAY_SIZE(cs35l32->supplies),
				      cs35l32->supplies);
	if (ret != 0) {
		dev_err(&i2c_client->dev,
			"Failed to request supplies: %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
				    cs35l32->supplies);
	if (ret != 0) {
		dev_err(&i2c_client->dev,
			"Failed to enable supplies: %d\n", ret);
		return ret;
	}

	/* Reset the Device */
	cs35l32->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
		"reset", GPIOD_OUT_LOW);
	if (IS_ERR(cs35l32->reset_gpio))
		return PTR_ERR(cs35l32->reset_gpio);

	gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);

	/* initialize codec */
	ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_AB, &reg);
	devid = (reg & 0xFF) << 12;

	ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_CD, &reg);
	devid |= (reg & 0xFF) << 4;

	ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_E, &reg);
	devid |= (reg & 0xF0) >> 4;

	if (devid != CS35L32_CHIP_ID) {
		ret = -ENODEV;
		dev_err(&i2c_client->dev,
			"CS35L32 Device ID (%X). Expected %X\n",
			devid, CS35L32_CHIP_ID);
		return ret;
	}

	ret = regmap_read(cs35l32->regmap, CS35L32_REV_ID, &reg);
	if (ret < 0) {
		dev_err(&i2c_client->dev, "Get Revision ID failed\n");
		return ret;
	}

	ret = regmap_register_patch(cs35l32->regmap, cs35l32_monitor_patch,
				    ARRAY_SIZE(cs35l32_monitor_patch));
	if (ret < 0) {
		dev_err(&i2c_client->dev, "Failed to apply errata patch\n");
		return ret;
	}

	dev_info(&i2c_client->dev,
		 "Cirrus Logic CS35L32, Revision: %02X\n", reg & 0xFF);

	/* Setup VBOOST Management */
	if (cs35l32->pdata.boost_mng)
		regmap_update_bits(cs35l32->regmap, CS35L32_AUDIO_LED_MNGR,
				   CS35L32_BOOST_MASK,
				cs35l32->pdata.boost_mng);

	/* Setup ADSP Format Config */
	if (cs35l32->pdata.sdout_share)
		regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
				    CS35L32_ADSP_SHARE_MASK,
				cs35l32->pdata.sdout_share << 3);

	/* Setup ADSP Data Configuration */
	if (cs35l32->pdata.sdout_datacfg)
		regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
				   CS35L32_ADSP_DATACFG_MASK,
				cs35l32->pdata.sdout_datacfg << 4);

	/* Setup Low Battery Recovery  */
	if (cs35l32->pdata.batt_recov)
		regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
				   CS35L32_BATT_REC_MASK,
				cs35l32->pdata.batt_recov << 1);

	/* Setup Low Battery Threshold */
	if (cs35l32->pdata.batt_thresh)
		regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
				   CS35L32_BATT_THRESH_MASK,
				cs35l32->pdata.batt_thresh << 4);

	/* Power down the AMP */
	regmap_update_bits(cs35l32->regmap, CS35L32_PWRCTL1, CS35L32_PDN_AMP,
			    CS35L32_PDN_AMP);

	/* Clear MCLK Error Bit since we don't have the clock yet */
	ret = regmap_read(cs35l32->regmap, CS35L32_INT_STATUS_1, &reg);

	ret =  snd_soc_register_codec(&i2c_client->dev,
			&soc_codec_dev_cs35l32, cs35l32_dai,
			ARRAY_SIZE(cs35l32_dai));
	if (ret < 0)
		goto err_disable;

	return 0;

err_disable:
	regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
			       cs35l32->supplies);
	return ret;
}

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static int cs35l32_i2c_remove(struct i2c_client *i2c_client)
{
	struct cs35l32_private *cs35l32 = i2c_get_clientdata(i2c_client);

	snd_soc_unregister_codec(&i2c_client->dev);

	/* Hold down reset */
	gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);

	return 0;
}

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#ifdef CONFIG_PM


static int cs35l32_runtime_suspend(struct device *dev)
{
	struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);

	regcache_cache_only(cs35l32->regmap, true);
	regcache_mark_dirty(cs35l32->regmap);

	/* Hold down reset */
	gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);

	/* remove power */
	regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
			       cs35l32->supplies);

	return 0;
}

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static int cs35l32_runtime_resume(struct device *dev)
{
	struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
	int ret;

	/* Enable power */
	ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
				    cs35l32->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to enable supplies: %d\n",
			ret);
		return ret;
	}

	gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);

	regcache_cache_only(cs35l32->regmap, false);
	regcache_sync(cs35l32->regmap);

	return 0;
}
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#endif


static const struct dev_pm_ops cs35l32_runtime_pm = {
	SET_RUNTIME_PM_OPS(cs35l32_runtime_suspend, cs35l32_runtime_resume,
			   NULL)
};


static const struct of_device_id cs35l32_of_match[] = {
	{ .compatible = "cirrus,cs35l32", },
	{},
};
MODULE_DEVICE_TABLE(of, cs35l32_of_match);



static const struct i2c_device_id cs35l32_id[] = {
	{"cs35l32", 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, cs35l32_id);


static struct i2c_driver cs35l32_i2c_driver = {
	.driver = {
		   .name = "cs35l32",
		   .pm = &cs35l32_runtime_pm,
		   .of_match_table = cs35l32_of_match,
                   },
	.id_table = cs35l32_id,
	.probe = cs35l32_i2c_probe,
	.remove = cs35l32_i2c_remove,
};


module_i2c_driver(cs35l32_i2c_driver);

MODULE_DESCRIPTION("ASoC CS35L32 driver");
MODULE_AUTHOR("Brian Austin, Cirrus Logic Inc, <brian.austin@cirrus.com>");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
brian austin
brian austin
2460
96.74%
3
30.00%
arnd bergmann
arnd bergmann
44
1.73%
1
10.00%
axel lin
axel lin
29
1.14%
2
20.00%
uwe kleine-koenig
uwe kleine-koenig
6
0.24%
1
10.00%
krzysztof kozlowski
krzysztof kozlowski
2
0.08%
1
10.00%
rafael j. wysocki
rafael j. wysocki
1
0.04%
1
10.00%
nariman poushin
nariman poushin
1
0.04%
1
10.00%
Total
2543
100.00%
10
100.00%
  
Directory: sound/soc/codecs

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