--- /dev/null
+/*
+ * max98371.c -- ALSA SoC Stereo MAX98371 driver
+ *
+ * Copyright 2015-16 Maxim Integrated Products
+ *
+ * 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/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include "max98371.h"
+
+static const char *const monomix_text[] = {
+ "Left", "Right", "LeftRightDiv2",
+};
+
+static const char *const hpf_cutoff_txt[] = {
+ "Disable", "DC Block", "50Hz",
+ "100Hz", "200Hz", "400Hz", "800Hz",
+};
+
+static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
+ monomix_text);
+
+static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
+ hpf_cutoff_txt);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain,
+ 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
+ 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
+ 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
+ 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
+ 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
+ 10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain,
+ 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
+ 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
+ 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
+ 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
+ 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
+ 10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain,
+ 0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0),
+ 2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0),
+ 7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0),
+ 9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0),
+ 12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0),
+ 14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0),
+);
+
+static const struct reg_default max98371_reg[] = {
+ { 0x01, 0x00 },
+ { 0x02, 0x00 },
+ { 0x03, 0x00 },
+ { 0x04, 0x00 },
+ { 0x05, 0x00 },
+ { 0x06, 0x00 },
+ { 0x07, 0x00 },
+ { 0x08, 0x00 },
+ { 0x09, 0x00 },
+ { 0x0A, 0x00 },
+ { 0x10, 0x06 },
+ { 0x11, 0x08 },
+ { 0x14, 0x80 },
+ { 0x15, 0x00 },
+ { 0x16, 0x00 },
+ { 0x18, 0x00 },
+ { 0x19, 0x00 },
+ { 0x1C, 0x00 },
+ { 0x1D, 0x00 },
+ { 0x1E, 0x00 },
+ { 0x1F, 0x00 },
+ { 0x20, 0x00 },
+ { 0x21, 0x00 },
+ { 0x22, 0x00 },
+ { 0x23, 0x00 },
+ { 0x24, 0x00 },
+ { 0x25, 0x00 },
+ { 0x26, 0x00 },
+ { 0x27, 0x00 },
+ { 0x28, 0x00 },
+ { 0x29, 0x00 },
+ { 0x2A, 0x00 },
+ { 0x2B, 0x00 },
+ { 0x2C, 0x00 },
+ { 0x2D, 0x00 },
+ { 0x2E, 0x0B },
+ { 0x31, 0x00 },
+ { 0x32, 0x18 },
+ { 0x33, 0x00 },
+ { 0x34, 0x00 },
+ { 0x36, 0x00 },
+ { 0x37, 0x00 },
+ { 0x38, 0x00 },
+ { 0x39, 0x00 },
+ { 0x3A, 0x00 },
+ { 0x3B, 0x00 },
+ { 0x3C, 0x00 },
+ { 0x3D, 0x00 },
+ { 0x3E, 0x00 },
+ { 0x3F, 0x00 },
+ { 0x40, 0x00 },
+ { 0x41, 0x00 },
+ { 0x42, 0x00 },
+ { 0x43, 0x00 },
+ { 0x4A, 0x00 },
+ { 0x4B, 0x00 },
+ { 0x4C, 0x00 },
+ { 0x4D, 0x00 },
+ { 0x4E, 0x00 },
+ { 0x50, 0x00 },
+ { 0x51, 0x00 },
+ { 0x55, 0x00 },
+ { 0x58, 0x00 },
+ { 0x59, 0x00 },
+ { 0x5C, 0x00 },
+ { 0xFF, 0x43 },
+};
+
+static bool max98371_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX98371_IRQ_CLEAR1:
+ case MAX98371_IRQ_CLEAR2:
+ case MAX98371_IRQ_CLEAR3:
+ case MAX98371_VERSION:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool max98371_readable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX98371_SOFT_RESET:
+ return false;
+ default:
+ return true;
+ }
+};
+
+static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv,
+ 0, 7, TLV_DB_SCALE_ITEM(0, 50, 0),
+ 8, 10, TLV_DB_SCALE_ITEM(400, 100, 0)
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv,
+ 0, 11, TLV_DB_SCALE_ITEM(950, 100, 0),
+);
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
+
+static const struct snd_kcontrol_new max98371_snd_controls[] = {
+ SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN,
+ MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0,
+ max98371_gain_tlv),
+ SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0,
+ (1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv),
+ SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN,
+ 0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0,
+ max98371_dht_max_gain),
+ SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN,
+ 0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0,
+ max98371_dht_min_gain),
+ SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN,
+ 0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0,
+ max98371_dht_rot_gain),
+ SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0),
+ SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0),
+ SOC_ENUM("Monomix Select", max98371_monomix),
+ SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff),
+};
+
+static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec);
+ unsigned int val = 0;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ dev_err(codec->dev, "DAI clock mode unsupported");
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ val |= 0;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ val |= MAX98371_DAI_RIGHT;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ val |= MAX98371_DAI_LEFT;
+ break;
+ default:
+ dev_err(codec->dev, "DAI wrong mode unsupported");
+ return -EINVAL;
+ }
+ regmap_update_bits(max98371->regmap, MAX98371_FMT,
+ MAX98371_FMT_MODE_MASK, val);
+ return 0;
+}
+
+static int max98371_dai_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 max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec);
+ int blr_clk_ratio, ch_size, channels = params_channels(params);
+ int rate = params_rate(params);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ regmap_update_bits(max98371->regmap, MAX98371_FMT,
+ MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
+ ch_size = 8;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ regmap_update_bits(max98371->regmap, MAX98371_FMT,
+ MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
+ ch_size = 16;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ regmap_update_bits(max98371->regmap, MAX98371_FMT,
+ MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
+ ch_size = 24;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ regmap_update_bits(max98371->regmap, MAX98371_FMT,
+ MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
+ ch_size = 32;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* BCLK/LRCLK ratio calculation */
+ blr_clk_ratio = channels * ch_size;
+ switch (blr_clk_ratio) {
+ case 32:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_DAI_CLK,
+ MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32);
+ break;
+ case 48:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_DAI_CLK,
+ MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48);
+ break;
+ case 64:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_DAI_CLK,
+ MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (rate) {
+ case 32000:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_SPK_SR,
+ MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32);
+ break;
+ case 44100:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_SPK_SR,
+ MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44);
+ break;
+ case 48000:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_SPK_SR,
+ MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48);
+ break;
+ case 88200:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_SPK_SR,
+ MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88);
+ break;
+ case 96000:
+ regmap_update_bits(max98371->regmap,
+ MAX98371_SPK_SR,
+ MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* enabling both the RX channels*/
+ regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC,
+ MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1);
+ regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL,
+ MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK);
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0),
+ SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE,
+ 0, 0, NULL, 0),
+ SND_SOC_DAPM_OUTPUT("SPK_OUT"),
+};
+
+static const struct snd_soc_dapm_route max98371_audio_map[] = {
+ {"DAC", NULL, "HiFi Playback"},
+ {"SPK_OUT", NULL, "DAC"},
+ {"SPK_OUT", NULL, "Global Enable"},
+};
+
+#define MAX98371_RATES SNDRV_PCM_RATE_8000_48000
+#define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
+ SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
+
+static const struct snd_soc_dai_ops max98371_dai_ops = {
+ .set_fmt = max98371_dai_set_fmt,
+ .hw_params = max98371_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver max98371_dai[] = {
+ {
+ .name = "max98371-aif1",
+ .playback = {
+ .stream_name = "HiFi Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = MAX98371_FORMATS,
+ },
+ .ops = &max98371_dai_ops,
+ }
+};
+
+static const struct snd_soc_codec_driver max98371_codec = {
+ .controls = max98371_snd_controls,
+ .num_controls = ARRAY_SIZE(max98371_snd_controls),
+ .dapm_routes = max98371_audio_map,
+ .num_dapm_routes = ARRAY_SIZE(max98371_audio_map),
+ .dapm_widgets = max98371_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets),
+};
+
+static const struct regmap_config max98371_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX98371_VERSION,
+ .reg_defaults = max98371_reg,
+ .num_reg_defaults = ARRAY_SIZE(max98371_reg),
+ .volatile_reg = max98371_volatile_register,
+ .readable_reg = max98371_readable_register,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int max98371_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max98371_priv *max98371;
+ int ret, reg;
+
+ max98371 = devm_kzalloc(&i2c->dev,
+ sizeof(*max98371), GFP_KERNEL);
+ if (!max98371)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, max98371);
+ max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap);
+ if (IS_ERR(max98371->regmap)) {
+ ret = PTR_ERR(max98371->regmap);
+ dev_err(&i2c->dev,
+ "Failed to allocate regmap: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®);
+ if (ret < 0) {
+ dev_info(&i2c->dev, "device error %d\n", ret);
+ return ret;
+ }
+ dev_info(&i2c->dev, "device version %x\n", reg);
+
+ ret = snd_soc_register_codec(&i2c->dev, &max98371_codec,
+ max98371_dai, ARRAY_SIZE(max98371_dai));
+ if (ret < 0) {
+ dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
+ return ret;
+ }
+ return ret;
+}
+
+static int max98371_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id max98371_i2c_id[] = {
+ { "max98371", 0 },
+};
+
+MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
+
+static const struct of_device_id max98371_of_match[] = {
+ { .compatible = "maxim,max98371", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max98371_of_match);
+
+static struct i2c_driver max98371_i2c_driver = {
+ .driver = {
+ .name = "max98371",
+ .owner = THIS_MODULE,
+ .pm = NULL,
+ .of_match_table = of_match_ptr(max98371_of_match),
+ },
+ .probe = max98371_i2c_probe,
+ .remove = max98371_i2c_remove,
+ .id_table = max98371_i2c_id,
+};
+
+module_i2c_driver(max98371_i2c_driver);
+
+MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
+MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
+MODULE_LICENSE("GPL");
projects / cascardo / linux.git / commitdiff