ASoC: cs4349: Add support for Cirrus Logic CS4349
Signed-off-by: Tim Howe <tim.howe@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/cs4349.c b/sound/soc/codecs/cs4349.c
new file mode 100644
index 0000000..a8df8a74
--- /dev/null
+++ b/sound/soc/codecs/cs4349.c
@@ -0,0 +1,401 @@
+/*
+ * cs4349.c -- CS4349 ALSA Soc Audio driver
+ *
+ * Copyright 2015 Cirrus Logic, Inc.
+ *
+ * Authors: Tim Howe <Tim.Howe@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/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.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 "cs4349.h"
+
+
+static const struct reg_default cs4349_reg_defaults[] = {
+ { 2, 0x00 }, /* r02 - Mode Control */
+ { 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */
+ { 4, 0x81 }, /* r04 - Mute Control */
+ { 5, 0x00 }, /* r05 - Channel A Volume Control */
+ { 6, 0x00 }, /* r06 - Channel B Volume Control */
+ { 7, 0xB1 }, /* r07 - Ramp and Filter Control */
+ { 8, 0x1C }, /* r08 - Misc. Control */
+};
+
+/* Private data for the CS4349 */
+struct cs4349_private {
+ struct regmap *regmap;
+ struct cs4349_platform_data pdata;
+ struct gpio_desc *reset_gpio;
+ unsigned int mode;
+ int rate;
+};
+
+static bool cs4349_readable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CS4349_CHIPID:
+ case CS4349_MODE:
+ case CS4349_VMI:
+ case CS4349_MUTE:
+ case CS4349_VOLA:
+ case CS4349_VOLB:
+ case CS4349_RMPFLT:
+ case CS4349_MISC:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int format)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec);
+ unsigned int fmt;
+
+ fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
+
+ switch (fmt) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_codec *codec = rtd->codec;
+ struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec);
+ int mode, fmt, ret;
+
+ mode = snd_soc_read(codec, CS4349_MODE);
+ cs4349->rate = params_rate(params);
+
+ switch (cs4349->mode) {
+ case SND_SOC_DAIFMT_I2S:
+ mode |= MODE_FORMAT(DIF_I2S);
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ mode |= MODE_FORMAT(DIF_LEFT_JST);
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ switch (params_width(params)) {
+ case 16:
+ fmt = DIF_RGHT_JST16;
+ break;
+ case 24:
+ fmt = DIF_RGHT_JST24;
+ break;
+ default:
+ return -EINVAL;
+ }
+ mode |= MODE_FORMAT(fmt);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = snd_soc_write(codec, CS4349_MODE, mode);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ int reg;
+
+ reg = 0;
+ if (mute)
+ reg = MUTE_AB_MASK;
+
+ return snd_soc_update_bits(codec, CS4349_MUTE, MUTE_AB_MASK, reg);
+}
+
+static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
+
+static const char * const chan_mix_texts[] = {
+ "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
+ "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
+ "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
+ /*Normal == Channel A = Left, Channel B = Right*/
+};
+
+static const char * const fm_texts[] = {
+ "Auto", "Single", "Double", "Quad",
+};
+
+static const char * const deemph_texts[] = {
+ "None", "44.1k", "48k", "32k",
+};
+
+static const char * const softr_zeroc_texts[] = {
+ "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
+};
+
+static int deemph_values[] = {
+ 0, 4, 8, 12,
+};
+
+static int softr_zeroc_values[] = {
+ 0, 64, 128, 192,
+};
+
+static const struct soc_enum chan_mix_enum =
+ SOC_ENUM_SINGLE(CS4349_VMI, 0,
+ ARRAY_SIZE(chan_mix_texts),
+ chan_mix_texts);
+
+static const struct soc_enum fm_mode_enum =
+ SOC_ENUM_SINGLE(CS4349_MODE, 0,
+ ARRAY_SIZE(fm_texts),
+ fm_texts);
+
+static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
+ deemph_texts, deemph_values);
+
+static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
+ SR_ZC_MASK, softr_zeroc_texts,
+ softr_zeroc_values);
+
+static const struct snd_kcontrol_new cs4349_snd_controls[] = {
+ SOC_DOUBLE_R_TLV("Master Playback Volume",
+ CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
+ SOC_ENUM("Functional Mode", fm_mode_enum),
+ SOC_ENUM("De-Emphasis Control", deemph_enum),
+ SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
+ SOC_ENUM("Channel Mixer", chan_mix_enum),
+ SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
+ SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
+ SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
+ SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
+ SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
+ SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
+ SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
+ SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
+ SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
+ SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
+
+ SND_SOC_DAPM_OUTPUT("OutputA"),
+ SND_SOC_DAPM_OUTPUT("OutputB"),
+};
+
+static const struct snd_soc_dapm_route cs4349_routes[] = {
+ {"DAC Playback", NULL, "OutputA"},
+ {"DAC Playback", NULL, "OutputB"},
+
+ {"OutputA", NULL, "HiFi DAC"},
+ {"OutputB", NULL, "HiFi DAC"},
+};
+
+#define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
+ SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+#define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
+
+static const struct snd_soc_dai_ops cs4349_dai_ops = {
+ .hw_params = cs4349_pcm_hw_params,
+ .set_fmt = cs4349_set_dai_fmt,
+ .digital_mute = cs4349_digital_mute,
+};
+
+static struct snd_soc_dai_driver cs4349_dai = {
+ .name = "cs4349_hifi",
+ .playback = {
+ .stream_name = "DAC Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = CS4349_PCM_RATES,
+ .formats = CS4349_PCM_FORMATS,
+ },
+ .ops = &cs4349_dai_ops,
+ .symmetric_rates = 1,
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_cs4349 = {
+ .controls = cs4349_snd_controls,
+ .num_controls = ARRAY_SIZE(cs4349_snd_controls),
+
+ .dapm_widgets = cs4349_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets),
+ .dapm_routes = cs4349_routes,
+ .num_dapm_routes = ARRAY_SIZE(cs4349_routes),
+};
+
+static struct regmap_config cs4349_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = CS4349_NUMREGS,
+ .reg_defaults = cs4349_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
+ .readable_reg = cs4349_readable_register,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int cs4349_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cs4349_private *cs4349;
+ struct cs4349_platform_data *pdata = dev_get_platdata(&client->dev);
+ int ret = 0;
+
+ cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
+ if (!cs4349)
+ return -ENOMEM;
+
+ cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
+ if (IS_ERR(cs4349->regmap)) {
+ ret = PTR_ERR(cs4349->regmap);
+ dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
+ return ret;
+ }
+
+ if (pdata)
+ cs4349->pdata = *pdata;
+
+ /* Reset the Device */
+ cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
+ "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(cs4349->reset_gpio))
+ return PTR_ERR(cs4349->reset_gpio);
+
+ if (cs4349->reset_gpio)
+ gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
+
+ i2c_set_clientdata(client, cs4349);
+
+ return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4349,
+ &cs4349_dai, 1);
+}
+
+static int cs4349_i2c_remove(struct i2c_client *client)
+{
+ struct cs4349_private *cs4349 = i2c_get_clientdata(client);
+
+ snd_soc_unregister_codec(&client->dev);
+
+ /* Hold down reset */
+ if (cs4349->reset_gpio)
+ gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int cs4349_runtime_suspend(struct device *dev)
+{
+ struct cs4349_private *cs4349 = dev_get_drvdata(dev);
+ struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+ int ret;
+
+ ret = snd_soc_update_bits(rtd->codec, CS4349_MISC, PWR_DWN, 1);
+ if (ret < 0)
+ return ret;
+
+ regcache_cache_only(cs4349->regmap, true);
+
+ /* Hold down reset */
+ if (cs4349->reset_gpio)
+ gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
+
+ return 0;
+}
+
+static int cs4349_runtime_resume(struct device *dev)
+{
+ struct cs4349_private *cs4349 = dev_get_drvdata(dev);
+ struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+ int ret;
+
+ ret = snd_soc_update_bits(rtd->codec, CS4349_MISC, PWR_DWN, 0);
+ if (ret < 0)
+ return ret;
+
+ if (cs4349->reset_gpio)
+ gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
+
+ regcache_cache_only(cs4349->regmap, false);
+ regcache_sync(cs4349->regmap);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops cs4349_runtime_pm = {
+ SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
+ NULL)
+};
+
+static const struct of_device_id cs4349_of_match[] = {
+ { .compatible = "cirrus,cs4349", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, cs4349_of_match);
+
+static const struct i2c_device_id cs4349_i2c_id[] = {
+ {"cs4349", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
+
+static struct i2c_driver cs4349_i2c_driver = {
+ .driver = {
+ .name = "cs4349",
+ .owner = THIS_MODULE,
+ .of_match_table = cs4349_of_match,
+ },
+ .id_table = cs4349_i2c_id,
+ .probe = cs4349_i2c_probe,
+ .remove = cs4349_i2c_remove,
+};
+
+module_i2c_driver(cs4349_i2c_driver);
+
+MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
+MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
+MODULE_LICENSE("GPL");