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linux/sound/soc/codecs/cs35l32.c
Krzysztof Kozlowski d883641f87 ASoC: cs35l32: Constify struct regmap_config and snd_soc_codec_driver 
The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const. Make struct
snd_soc_codec_driver const as well (snd_soc_register_codec() accepts
pointer to const).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-05 21:16:06 +00:00

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/*
* 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/version.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:
case CS35L32_DEVID_CD:
case CS35L32_DEVID_E:
case CS35L32_FAB_ID:
case CS35L32_REV_ID:
case CS35L32_PWRCTL1:
case CS35L32_PWRCTL2:
case CS35L32_CLK_CTL:
case CS35L32_BATT_THRESHOLD:
case CS35L32_VMON:
case CS35L32_BST_CPCP_CTL:
case CS35L32_IMON_SCALING:
case CS35L32_AUDIO_LED_MNGR:
case CS35L32_ADSP_CTL:
case CS35L32_CLASSD_CTL:
case CS35L32_PROTECT_CTL:
case CS35L32_INT_MASK_1:
case CS35L32_INT_MASK_2:
case CS35L32_INT_MASK_3:
case CS35L32_INT_STATUS_1:
case CS35L32_INT_STATUS_2:
case CS35L32_INT_STATUS_3:
case CS35L32_LED_STATUS:
case CS35L32_FLASH_MODE:
case CS35L32_MOVIE_MODE:
case CS35L32_FLASH_TIMER:
case CS35L32_FLASH_INHIBIT:
return true;
default:
return false;
}
}
static bool cs35l32_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS35L32_DEVID_AB:
case CS35L32_DEVID_CD:
case CS35L32_DEVID_E:
case CS35L32_FAB_ID:
case CS35L32_REV_ID:
case CS35L32_INT_STATUS_1:
case CS35L32_INT_STATUS_2:
case CS35L32_INT_STATUS_3:
case CS35L32_LED_STATUS:
return true;
default:
return false;
}
}
static bool cs35l32_precious_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS35L32_INT_STATUS_1:
case CS35L32_INT_STATUS_2:
case CS35L32_INT_STATUS_3:
case CS35L32_LED_STATUS:
return true;
default:
return false;
}
}
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;
}
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);
}
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);
}
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_default 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;
of_property_read_u32(np, "cirrus,boost-manager", &val);
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;
default:
dev_err(&i2c_client->dev,
"Wrong cirrus,boost-manager DT value %d\n", val);
pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS;
}
of_property_read_u32(np, "cirrus,sdout-datacfg", &val);
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;
default:
dev_err(&i2c_client->dev,
"Wrong cirrus,sdout-datacfg DT value %d\n", val);
pdata->sdout_datacfg = CS35L32_DATA_CFG_LR;
}
of_property_read_u32(np, "cirrus,battery-threshold", &val);
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;
default:
dev_err(&i2c_client->dev,
"Wrong cirrus,battery-threshold DT value %d\n", val);
pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V;
}
of_property_read_u32(np, "cirrus,battery-recovery", &val);
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;
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;
}
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(&i2c_client->dev,
"reset-gpios");
if (IS_ERR(cs35l32->reset_gpio)) {
ret = PTR_ERR(cs35l32->reset_gpio);
if (ret != -ENOENT && ret != -ENOSYS)
return ret;
cs35l32->reset_gpio = NULL;
} else {
ret = gpiod_direction_output(cs35l32->reset_gpio, 0);
if (ret)
return ret;
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;
}
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 */
if (cs35l32->reset_gpio)
gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
return 0;
}
#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 */
if (cs35l32->reset_gpio)
gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
/* remove power */
regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
cs35l32->supplies);
return 0;
}
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;
}
if (cs35l32->reset_gpio)
gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
regcache_cache_only(cs35l32->regmap, false);
regcache_sync(cs35l32->regmap);
return 0;
}
#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",
.owner = THIS_MODULE,
.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");
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