--- /dev/null
+/*
+ * Cirrus Logic CS42448/CS42888 Audio CODEC Digital Audio Interface (DAI) driver
+ *
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ *
+ * Author: Nicolin Chen <Guangyu.Chen@freescale.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#include "cs42xx8.h"
+
+#define CS42XX8_NUM_SUPPLIES 4
+static const char *const cs42xx8_supply_names[CS42XX8_NUM_SUPPLIES] = {
+ "VA",
+ "VD",
+ "VLS",
+ "VLC",
+};
+
+#define CS42XX8_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+/* codec private data */
+struct cs42xx8_priv {
+ struct regulator_bulk_data supplies[CS42XX8_NUM_SUPPLIES];
+ const struct cs42xx8_driver_data *drvdata;
+ struct regmap *regmap;
+ struct clk *clk;
+
+ bool slave_mode;
+ unsigned long sysclk;
+};
+
+/* -127.5dB to 0dB with step of 0.5dB */
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
+/* -64dB to 24dB with step of 0.5dB */
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -6400, 50, 0);
+
+static const char *const cs42xx8_adc_single[] = { "Differential", "Single-Ended" };
+static const char *const cs42xx8_szc[] = { "Immediate Change", "Zero Cross",
+ "Soft Ramp", "Soft Ramp on Zero Cross" };
+
+static const struct soc_enum adc1_single_enum =
+ SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 4, 2, cs42xx8_adc_single);
+static const struct soc_enum adc2_single_enum =
+ SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 3, 2, cs42xx8_adc_single);
+static const struct soc_enum adc3_single_enum =
+ SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 2, 2, cs42xx8_adc_single);
+static const struct soc_enum dac_szc_enum =
+ SOC_ENUM_SINGLE(CS42XX8_TXCTL, 5, 4, cs42xx8_szc);
+static const struct soc_enum adc_szc_enum =
+ SOC_ENUM_SINGLE(CS42XX8_TXCTL, 0, 4, cs42xx8_szc);
+
+static const struct snd_kcontrol_new cs42xx8_snd_controls[] = {
+ SOC_DOUBLE_R_TLV("DAC1 Playback Volume", CS42XX8_VOLAOUT1,
+ CS42XX8_VOLAOUT2, 0, 0xff, 1, dac_tlv),
+ SOC_DOUBLE_R_TLV("DAC2 Playback Volume", CS42XX8_VOLAOUT3,
+ CS42XX8_VOLAOUT4, 0, 0xff, 1, dac_tlv),
+ SOC_DOUBLE_R_TLV("DAC3 Playback Volume", CS42XX8_VOLAOUT5,
+ CS42XX8_VOLAOUT6, 0, 0xff, 1, dac_tlv),
+ SOC_DOUBLE_R_TLV("DAC4 Playback Volume", CS42XX8_VOLAOUT7,
+ CS42XX8_VOLAOUT8, 0, 0xff, 1, dac_tlv),
+ SOC_DOUBLE_R_S_TLV("ADC1 Capture Volume", CS42XX8_VOLAIN1,
+ CS42XX8_VOLAIN2, 0, -0x80, 0x30, 7, 0, adc_tlv),
+ SOC_DOUBLE_R_S_TLV("ADC2 Capture Volume", CS42XX8_VOLAIN3,
+ CS42XX8_VOLAIN4, 0, -0x80, 0x30, 7, 0, adc_tlv),
+ SOC_DOUBLE("DAC1 Invert Switch", CS42XX8_DACINV, 0, 1, 1, 0),
+ SOC_DOUBLE("DAC2 Invert Switch", CS42XX8_DACINV, 2, 3, 1, 0),
+ SOC_DOUBLE("DAC3 Invert Switch", CS42XX8_DACINV, 4, 5, 1, 0),
+ SOC_DOUBLE("DAC4 Invert Switch", CS42XX8_DACINV, 6, 7, 1, 0),
+ SOC_DOUBLE("ADC1 Invert Switch", CS42XX8_ADCINV, 0, 1, 1, 0),
+ SOC_DOUBLE("ADC2 Invert Switch", CS42XX8_ADCINV, 2, 3, 1, 0),
+ SOC_SINGLE("ADC High-Pass Filter Switch", CS42XX8_ADCCTL, 7, 1, 1),
+ SOC_SINGLE("DAC De-emphasis Switch", CS42XX8_ADCCTL, 5, 1, 0),
+ SOC_ENUM("ADC1 Single Ended Mode Switch", adc1_single_enum),
+ SOC_ENUM("ADC2 Single Ended Mode Switch", adc2_single_enum),
+ SOC_SINGLE("DAC Single Volume Control Switch", CS42XX8_TXCTL, 7, 1, 0),
+ SOC_ENUM("DAC Soft Ramp & Zero Cross Control Switch", dac_szc_enum),
+ SOC_SINGLE("DAC Auto Mute Switch", CS42XX8_TXCTL, 4, 1, 0),
+ SOC_SINGLE("Mute ADC Serial Port Switch", CS42XX8_TXCTL, 3, 1, 0),
+ SOC_SINGLE("ADC Single Volume Control Switch", CS42XX8_TXCTL, 2, 1, 0),
+ SOC_ENUM("ADC Soft Ramp & Zero Cross Control Switch", adc_szc_enum),
+};
+
+static const struct snd_kcontrol_new cs42xx8_adc3_snd_controls[] = {
+ SOC_DOUBLE_R_S_TLV("ADC3 Capture Volume", CS42XX8_VOLAIN5,
+ CS42XX8_VOLAIN6, 0, -0x80, 0x30, 7, 0, adc_tlv),
+ SOC_DOUBLE("ADC3 Invert Switch", CS42XX8_ADCINV, 4, 5, 1, 0),
+ SOC_ENUM("ADC3 Single Ended Mode Switch", adc3_single_enum),
+};
+
+static const struct snd_soc_dapm_widget cs42xx8_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("DAC1", "Playback", CS42XX8_PWRCTL, 1, 1),
+ SND_SOC_DAPM_DAC("DAC2", "Playback", CS42XX8_PWRCTL, 2, 1),
+ SND_SOC_DAPM_DAC("DAC3", "Playback", CS42XX8_PWRCTL, 3, 1),
+ SND_SOC_DAPM_DAC("DAC4", "Playback", CS42XX8_PWRCTL, 4, 1),
+
+ SND_SOC_DAPM_OUTPUT("AOUT1L"),
+ SND_SOC_DAPM_OUTPUT("AOUT1R"),
+ SND_SOC_DAPM_OUTPUT("AOUT2L"),
+ SND_SOC_DAPM_OUTPUT("AOUT2R"),
+ SND_SOC_DAPM_OUTPUT("AOUT3L"),
+ SND_SOC_DAPM_OUTPUT("AOUT3R"),
+ SND_SOC_DAPM_OUTPUT("AOUT4L"),
+ SND_SOC_DAPM_OUTPUT("AOUT4R"),
+
+ SND_SOC_DAPM_ADC("ADC1", "Capture", CS42XX8_PWRCTL, 5, 1),
+ SND_SOC_DAPM_ADC("ADC2", "Capture", CS42XX8_PWRCTL, 6, 1),
+
+ SND_SOC_DAPM_INPUT("AIN1L"),
+ SND_SOC_DAPM_INPUT("AIN1R"),
+ SND_SOC_DAPM_INPUT("AIN2L"),
+ SND_SOC_DAPM_INPUT("AIN2R"),
+
+ SND_SOC_DAPM_SUPPLY("PWR", CS42XX8_PWRCTL, 0, 1, NULL, 0),
+};
+
+static const struct snd_soc_dapm_widget cs42xx8_adc3_dapm_widgets[] = {
+ SND_SOC_DAPM_ADC("ADC3", "Capture", CS42XX8_PWRCTL, 7, 1),
+
+ SND_SOC_DAPM_INPUT("AIN3L"),
+ SND_SOC_DAPM_INPUT("AIN3R"),
+};
+
+static const struct snd_soc_dapm_route cs42xx8_dapm_routes[] = {
+ /* Playback */
+ { "AOUT1L", NULL, "DAC1" },
+ { "AOUT1R", NULL, "DAC1" },
+ { "DAC1", NULL, "PWR" },
+
+ { "AOUT2L", NULL, "DAC2" },
+ { "AOUT2R", NULL, "DAC2" },
+ { "DAC2", NULL, "PWR" },
+
+ { "AOUT3L", NULL, "DAC3" },
+ { "AOUT3R", NULL, "DAC3" },
+ { "DAC3", NULL, "PWR" },
+
+ { "AOUT4L", NULL, "DAC4" },
+ { "AOUT4R", NULL, "DAC4" },
+ { "DAC4", NULL, "PWR" },
+
+ /* Capture */
+ { "ADC1", NULL, "AIN1L" },
+ { "ADC1", NULL, "AIN1R" },
+ { "ADC1", NULL, "PWR" },
+
+ { "ADC2", NULL, "AIN2L" },
+ { "ADC2", NULL, "AIN2R" },
+ { "ADC2", NULL, "PWR" },
+};
+
+static const struct snd_soc_dapm_route cs42xx8_adc3_dapm_routes[] = {
+ /* Capture */
+ { "ADC3", NULL, "AIN3L" },
+ { "ADC3", NULL, "AIN3R" },
+ { "ADC3", NULL, "PWR" },
+};
+
+struct cs42xx8_ratios {
+ unsigned int ratio;
+ unsigned char speed;
+ unsigned char mclk;
+};
+
+static const struct cs42xx8_ratios cs42xx8_ratios[] = {
+ { 64, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_256(4) },
+ { 96, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_384(4) },
+ { 128, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_512(4) },
+ { 192, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_768(4) },
+ { 256, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_256(1) },
+ { 384, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_384(1) },
+ { 512, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_512(1) },
+ { 768, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_768(1) },
+ { 1024, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_1024(1) }
+};
+
+static int cs42xx8_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 cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
+
+ cs42xx8->sysclk = freq;
+
+ return 0;
+}
+
+static int cs42xx8_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int format)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
+ u32 val;
+
+ /* Set DAI format */
+ switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_LEFT_J:
+ val = CS42XX8_INTF_DAC_DIF_LEFTJ | CS42XX8_INTF_ADC_DIF_LEFTJ;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ val = CS42XX8_INTF_DAC_DIF_I2S | CS42XX8_INTF_ADC_DIF_I2S;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ val = CS42XX8_INTF_DAC_DIF_RIGHTJ | CS42XX8_INTF_ADC_DIF_RIGHTJ;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ val = CS42XX8_INTF_DAC_DIF_TDM | CS42XX8_INTF_ADC_DIF_TDM;
+ break;
+ default:
+ dev_err(codec->dev, "unsupported dai format\n");
+ return -EINVAL;
+ }
+
+ regmap_update_bits(cs42xx8->regmap, CS42XX8_INTF,
+ CS42XX8_INTF_DAC_DIF_MASK |
+ CS42XX8_INTF_ADC_DIF_MASK, val);
+
+ /* Set master/slave audio interface */
+ switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ cs42xx8->slave_mode = true;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ cs42xx8->slave_mode = false;
+ break;
+ default:
+ dev_err(codec->dev, "unsupported master/slave mode\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cs42xx8_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ u32 ratio = cs42xx8->sysclk / params_rate(params);
+ u32 i, fm, val, mask;
+
+ for (i = 0; i < ARRAY_SIZE(cs42xx8_ratios); i++) {
+ if (cs42xx8_ratios[i].ratio == ratio)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(cs42xx8_ratios)) {
+ dev_err(codec->dev, "unsupported sysclk ratio\n");
+ return -EINVAL;
+ }
+
+ mask = CS42XX8_FUNCMOD_MFREQ_MASK;
+ val = cs42xx8_ratios[i].mclk;
+
+ fm = cs42xx8->slave_mode ? CS42XX8_FM_AUTO : cs42xx8_ratios[i].speed;
+
+ regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,
+ CS42XX8_FUNCMOD_xC_FM_MASK(tx) | mask,
+ CS42XX8_FUNCMOD_xC_FM(tx, fm) | val);
+
+ return 0;
+}
+
+static int cs42xx8_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
+
+ regmap_update_bits(cs42xx8->regmap, CS42XX8_DACMUTE,
+ CS42XX8_DACMUTE_ALL, mute ? CS42XX8_DACMUTE_ALL : 0);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops cs42xx8_dai_ops = {
+ .set_fmt = cs42xx8_set_dai_fmt,
+ .set_sysclk = cs42xx8_set_dai_sysclk,
+ .hw_params = cs42xx8_hw_params,
+ .digital_mute = cs42xx8_digital_mute,
+};
+
+static struct snd_soc_dai_driver cs42xx8_dai = {
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = CS42XX8_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = CS42XX8_FORMATS,
+ },
+ .ops = &cs42xx8_dai_ops,
+};
+
+static const struct reg_default cs42xx8_reg[] = {
+ { 0x01, 0x01 }, /* Chip I.D. and Revision Register */
+ { 0x02, 0x00 }, /* Power Control */
+ { 0x03, 0xF0 }, /* Functional Mode */
+ { 0x04, 0x46 }, /* Interface Formats */
+ { 0x05, 0x00 }, /* ADC Control & DAC De-Emphasis */
+ { 0x06, 0x10 }, /* Transition Control */
+ { 0x07, 0x00 }, /* DAC Channel Mute */
+ { 0x08, 0x00 }, /* Volume Control AOUT1 */
+ { 0x09, 0x00 }, /* Volume Control AOUT2 */
+ { 0x0a, 0x00 }, /* Volume Control AOUT3 */
+ { 0x0b, 0x00 }, /* Volume Control AOUT4 */
+ { 0x0c, 0x00 }, /* Volume Control AOUT5 */
+ { 0x0d, 0x00 }, /* Volume Control AOUT6 */
+ { 0x0e, 0x00 }, /* Volume Control AOUT7 */
+ { 0x0f, 0x00 }, /* Volume Control AOUT8 */
+ { 0x10, 0x00 }, /* DAC Channel Invert */
+ { 0x11, 0x00 }, /* Volume Control AIN1 */
+ { 0x12, 0x00 }, /* Volume Control AIN2 */
+ { 0x13, 0x00 }, /* Volume Control AIN3 */
+ { 0x14, 0x00 }, /* Volume Control AIN4 */
+ { 0x15, 0x00 }, /* Volume Control AIN5 */
+ { 0x16, 0x00 }, /* Volume Control AIN6 */
+ { 0x17, 0x00 }, /* ADC Channel Invert */
+ { 0x18, 0x00 }, /* Status Control */
+ { 0x1a, 0x00 }, /* Status Mask */
+ { 0x1b, 0x00 }, /* MUTEC Pin Control */
+};
+
+static bool cs42xx8_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CS42XX8_STATUS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool cs42xx8_writeable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CS42XX8_CHIPID:
+ case CS42XX8_STATUS:
+ return false;
+ default:
+ return true;
+ }
+}
+
+const struct regmap_config cs42xx8_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = CS42XX8_LASTREG,
+ .reg_defaults = cs42xx8_reg,
+ .num_reg_defaults = ARRAY_SIZE(cs42xx8_reg),
+ .volatile_reg = cs42xx8_volatile_register,
+ .writeable_reg = cs42xx8_writeable_register,
+ .cache_type = REGCACHE_RBTREE,
+};
+EXPORT_SYMBOL_GPL(cs42xx8_regmap_config);
+
+static int cs42xx8_codec_probe(struct snd_soc_codec *codec)
+{
+ struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
+ struct snd_soc_dapm_context *dapm = &codec->dapm;
+
+ switch (cs42xx8->drvdata->num_adcs) {
+ case 3:
+ snd_soc_add_codec_controls(codec, cs42xx8_adc3_snd_controls,
+ ARRAY_SIZE(cs42xx8_adc3_snd_controls));
+ snd_soc_dapm_new_controls(dapm, cs42xx8_adc3_dapm_widgets,
+ ARRAY_SIZE(cs42xx8_adc3_dapm_widgets));
+ snd_soc_dapm_add_routes(dapm, cs42xx8_adc3_dapm_routes,
+ ARRAY_SIZE(cs42xx8_adc3_dapm_routes));
+ break;
+ default:
+ break;
+ }
+
+ /* Mute all DAC channels */
+ regmap_write(cs42xx8->regmap, CS42XX8_DACMUTE, CS42XX8_DACMUTE_ALL);
+
+ return 0;
+}
+
+static const struct snd_soc_codec_driver cs42xx8_driver = {
+ .probe = cs42xx8_codec_probe,
+ .idle_bias_off = true,
+
+ .controls = cs42xx8_snd_controls,
+ .num_controls = ARRAY_SIZE(cs42xx8_snd_controls),
+ .dapm_widgets = cs42xx8_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(cs42xx8_dapm_widgets),
+ .dapm_routes = cs42xx8_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(cs42xx8_dapm_routes),
+};
+
+const struct cs42xx8_driver_data cs42448_data = {
+ .name = "cs42448",
+ .num_adcs = 3,
+};
+EXPORT_SYMBOL_GPL(cs42448_data);
+
+const struct cs42xx8_driver_data cs42888_data = {
+ .name = "cs42888",
+ .num_adcs = 2,
+};
+EXPORT_SYMBOL_GPL(cs42888_data);
+
+static const struct of_device_id cs42xx8_of_match[] = {
+ { .compatible = "cirrus,cs42448", .data = &cs42448_data, },
+ { .compatible = "cirrus,cs42888", .data = &cs42888_data, },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, cs42xx8_of_match);
+EXPORT_SYMBOL_GPL(cs42xx8_of_match);
+
+int cs42xx8_probe(struct device *dev, struct regmap *regmap)
+{
+ const struct of_device_id *of_id = of_match_device(cs42xx8_of_match, dev);
+ struct cs42xx8_priv *cs42xx8;
+ int ret, val, i;
+
+ cs42xx8 = devm_kzalloc(dev, sizeof(*cs42xx8), GFP_KERNEL);
+ if (cs42xx8 == NULL)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, cs42xx8);
+
+ if (of_id)
+ cs42xx8->drvdata = of_id->data;
+
+ if (!cs42xx8->drvdata) {
+ dev_err(dev, "failed to find driver data\n");
+ return -EINVAL;
+ }
+
+ cs42xx8->clk = devm_clk_get(dev, "mclk");
+ if (IS_ERR(cs42xx8->clk)) {
+ dev_err(dev, "failed to get the clock: %ld\n",
+ PTR_ERR(cs42xx8->clk));
+ return -EINVAL;
+ }
+
+ cs42xx8->sysclk = clk_get_rate(cs42xx8->clk);
+
+ for (i = 0; i < ARRAY_SIZE(cs42xx8->supplies); i++)
+ cs42xx8->supplies[i].supply = cs42xx8_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev,
+ ARRAY_SIZE(cs42xx8->supplies), cs42xx8->supplies);
+ if (ret) {
+ dev_err(dev, "failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),
+ cs42xx8->supplies);
+ if (ret) {
+ dev_err(dev, "failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ /* Make sure hardware reset done */
+ msleep(5);
+
+ cs42xx8->regmap = regmap;
+ if (IS_ERR(cs42xx8->regmap)) {
+ ret = PTR_ERR(cs42xx8->regmap);
+ dev_err(dev, "failed to allocate regmap: %d\n", ret);
+ goto err_enable;
+ }
+
+ /*
+ * We haven't marked the chip revision as volatile due to
+ * sharing a register with the right input volume; explicitly
+ * bypass the cache to read it.
+ */
+ regcache_cache_bypass(cs42xx8->regmap, true);
+
+ /* Validate the chip ID */
+ ret = regmap_read(cs42xx8->regmap, CS42XX8_CHIPID, &val);
+ if (ret < 0) {
+ dev_err(dev, "failed to get device ID, ret = %d", ret);
+ goto err_enable;
+ }
+
+ /* The top four bits of the chip ID should be 0000 */
+ if (((val & CS42XX8_CHIPID_CHIP_ID_MASK) >> 4) != 0x00) {
+ dev_err(dev, "unmatched chip ID: %d\n",
+ (val & CS42XX8_CHIPID_CHIP_ID_MASK) >> 4);
+ ret = -EINVAL;
+ goto err_enable;
+ }
+
+ dev_info(dev, "found device, revision %X\n",
+ val & CS42XX8_CHIPID_REV_ID_MASK);
+
+ regcache_cache_bypass(cs42xx8->regmap, false);
+
+ cs42xx8_dai.name = cs42xx8->drvdata->name;
+
+ /* Each adc supports stereo input */
+ cs42xx8_dai.capture.channels_max = cs42xx8->drvdata->num_adcs * 2;
+
+ ret = snd_soc_register_codec(dev, &cs42xx8_driver, &cs42xx8_dai, 1);
+ if (ret) {
+ dev_err(dev, "failed to register codec:%d\n", ret);
+ goto err_enable;
+ }
+
+ regcache_cache_only(cs42xx8->regmap, true);
+
+err_enable:
+ regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
+ cs42xx8->supplies);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cs42xx8_probe);
+
+#ifdef CONFIG_PM
+static int cs42xx8_runtime_resume(struct device *dev)
+{
+ struct cs42xx8_priv *cs42xx8 = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(cs42xx8->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable mclk: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),
+ cs42xx8->supplies);
+ if (ret) {
+ dev_err(dev, "failed to enable supplies: %d\n", ret);
+ goto err_clk;
+ }
+
+ /* Make sure hardware reset done */
+ msleep(5);
+
+ regcache_cache_only(cs42xx8->regmap, false);
+
+ ret = regcache_sync(cs42xx8->regmap);
+ if (ret) {
+ dev_err(dev, "failed to sync regmap: %d\n", ret);
+ goto err_bulk;
+ }
+
+ return 0;
+
+err_bulk:
+ regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
+ cs42xx8->supplies);
+err_clk:
+ clk_disable_unprepare(cs42xx8->clk);
+
+ return ret;
+}
+
+static int cs42xx8_runtime_suspend(struct device *dev)
+{
+ struct cs42xx8_priv *cs42xx8 = dev_get_drvdata(dev);
+
+ regcache_cache_only(cs42xx8->regmap, true);
+
+ regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
+ cs42xx8->supplies);
+
+ clk_disable_unprepare(cs42xx8->clk);
+
+ return 0;
+}
+#endif
+
+const struct dev_pm_ops cs42xx8_pm = {
+ SET_RUNTIME_PM_OPS(cs42xx8_runtime_suspend, cs42xx8_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_GPL(cs42xx8_pm);
+
+MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec Driver");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff