--- /dev/null
+/*
+ * MAX98504 ALSA SoC Audio driver
+ *
+ * Copyright 2013 - 2014 Maxim Integrated Products
+ * Copyright 2016 Samsung Electronics Co., Ltd.
+ *
+ * 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/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <sound/soc.h>
+
+#include "max98504.h"
+
+static const char * const max98504_supply_names[] = {
+ "DVDD",
+ "DIOVDD",
+ "PVDD",
+};
+#define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)
+
+struct max98504_priv {
+ struct regmap *regmap;
+ struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];
+ unsigned int pcm_rx_channels;
+ bool brownout_enable;
+ unsigned int brownout_threshold;
+ unsigned int brownout_attenuation;
+ unsigned int brownout_attack_hold;
+ unsigned int brownout_timed_hold;
+ unsigned int brownout_release_rate;
+};
+
+static struct reg_default max98504_reg_defaults[] = {
+ { 0x01, 0},
+ { 0x02, 0},
+ { 0x03, 0},
+ { 0x04, 0},
+ { 0x10, 0},
+ { 0x11, 0},
+ { 0x12, 0},
+ { 0x13, 0},
+ { 0x14, 0},
+ { 0x15, 0},
+ { 0x16, 0},
+ { 0x17, 0},
+ { 0x18, 0},
+ { 0x19, 0},
+ { 0x1A, 0},
+ { 0x20, 0},
+ { 0x21, 0},
+ { 0x22, 0},
+ { 0x23, 0},
+ { 0x24, 0},
+ { 0x25, 0},
+ { 0x26, 0},
+ { 0x27, 0},
+ { 0x28, 0},
+ { 0x30, 0},
+ { 0x31, 0},
+ { 0x32, 0},
+ { 0x33, 0},
+ { 0x34, 0},
+ { 0x35, 0},
+ { 0x36, 0},
+ { 0x37, 0},
+ { 0x38, 0},
+ { 0x39, 0},
+ { 0x40, 0},
+ { 0x41, 0},
+};
+
+static bool max98504_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX98504_INTERRUPT_STATUS:
+ case MAX98504_INTERRUPT_FLAGS:
+ case MAX98504_INTERRUPT_FLAG_CLEARS:
+ case MAX98504_WATCHDOG_CLEAR:
+ case MAX98504_GLOBAL_ENABLE:
+ case MAX98504_SOFTWARE_RESET:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool max98504_readable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX98504_SOFTWARE_RESET:
+ case MAX98504_WATCHDOG_CLEAR:
+ case MAX98504_INTERRUPT_FLAG_CLEARS:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
+ struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,
+ max98504->pcm_rx_channels);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);
+ break;
+ }
+
+ return 0;
+}
+
+static int max98504_component_probe(struct snd_soc_component *c)
+{
+ struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
+ struct regmap *map = max98504->regmap;
+ int ret;
+
+ ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);
+ if (ret < 0)
+ return ret;
+
+ regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);
+ msleep(20);
+
+ if (!max98504->brownout_enable)
+ return 0;
+
+ regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);
+
+ regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,
+ (max98504->brownout_threshold & 0x1f) << 3 |
+ (max98504->brownout_attenuation & 0x3));
+
+ regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,
+ max98504->brownout_attack_hold & 0xff);
+
+ regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,
+ max98504->brownout_timed_hold & 0xff);
+
+ regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,
+ max98504->brownout_release_rate & 0xff);
+
+ return 0;
+}
+
+static void max98504_component_remove(struct snd_soc_component *c)
+{
+ struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
+
+ regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);
+}
+
+static const char *spk_source_mux_text[] = {
+ "PCM Monomix", "Analog In", "PDM Left", "PDM Right"
+};
+
+static const struct soc_enum spk_source_mux_enum =
+ SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,
+ 0, ARRAY_SIZE(spk_source_mux_text),
+ spk_source_mux_text);
+
+static const struct snd_kcontrol_new spk_source_mux =
+ SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);
+
+static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
+ { "SPKOUT", NULL, "Global Enable" },
+ { "SPK Source", "PCM Monomix", "DAC PCM" },
+ { "SPK Source", "Analog In", "AIN" },
+ { "SPK Source", "PDM Left", "DAC PDM" },
+ { "SPK Source", "PDM Right", "DAC PDM" },
+};
+
+static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
+ SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,
+ 0, 0, NULL, 0),
+ SND_SOC_DAPM_INPUT("AIN"),
+ SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,
+ max98504_pcm_rx_ev,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),
+ SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),
+ SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
+ MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),
+};
+
+static int max98504_set_tdm_slot(struct snd_soc_dai *dai,
+ unsigned int tx_mask, unsigned int rx_mask,
+ int slots, int slot_width)
+{
+ struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
+ struct regmap *map = max98504->regmap;
+
+
+ switch (dai->id) {
+ case MAX98504_DAI_ID_PCM:
+ regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);
+ max98504->pcm_rx_channels = rx_mask;
+ break;
+
+ case MAX98504_DAI_ID_PDM:
+ regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ return 0;
+}
+static int max98504_set_channel_map(struct snd_soc_dai *dai,
+ unsigned int tx_num, unsigned int *tx_slot,
+ unsigned int rx_num, unsigned int *rx_slot)
+{
+ struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
+ struct regmap *map = max98504->regmap;
+ unsigned int i, sources = 0;
+
+ for (i = 0; i < tx_num; i++)
+ if (tx_slot[i])
+ sources |= (1 << i);
+
+ switch (dai->id) {
+ case MAX98504_DAI_ID_PCM:
+ regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,
+ sources);
+ break;
+
+ case MAX98504_DAI_ID_PDM:
+ regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops max98504_dai_ops = {
+ .set_tdm_slot = max98504_set_tdm_slot,
+ .set_channel_map = max98504_set_channel_map,
+};
+
+#define MAX98504_FORMATS (SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\
+ SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)
+#define MAX98504_PDM_RATES (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
+ SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\
+ SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\
+ SNDRV_PCM_RATE_96000)
+
+static struct snd_soc_dai_driver max98504_dai[] = {
+ /* TODO: Add the PCM interface definitions */
+ {
+ .name = "max98504-aif2",
+ .id = MAX98504_DAI_ID_PDM,
+ .playback = {
+ .stream_name = "AIF2 Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = MAX98504_PDM_RATES,
+ .formats = MAX98504_FORMATS,
+ },
+ .capture = {
+ .stream_name = "AIF2 Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = MAX98504_PDM_RATES,
+ .formats = MAX98504_FORMATS,
+ },
+ .ops = &max98504_dai_ops,
+ },
+};
+
+static const struct snd_soc_component_driver max98504_component_driver = {
+ .probe = max98504_component_probe,
+ .remove = max98504_component_remove,
+ .dapm_widgets = max98504_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(max98504_dapm_widgets),
+ .dapm_routes = max98504_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(max98504_dapm_routes),
+};
+
+static const struct regmap_config max98504_regmap = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .max_register = MAX98504_MAX_REGISTER,
+ .reg_defaults = max98504_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(max98504_reg_defaults),
+ .volatile_reg = max98504_volatile_register,
+ .readable_reg = max98504_readable_register,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int max98504_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct device_node *node = dev->of_node;
+ struct max98504_priv *max98504;
+ int i, ret;
+
+ max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);
+ if (!max98504)
+ return -ENOMEM;
+
+ if (node) {
+ if (!of_property_read_u32(node, "maxim,brownout-threshold",
+ &max98504->brownout_threshold))
+ max98504->brownout_enable = true;
+
+ of_property_read_u32(node, "maxim,brownout-attenuation",
+ &max98504->brownout_attenuation);
+ of_property_read_u32(node, "maxim,brownout-attack-hold-ms",
+ &max98504->brownout_attack_hold);
+ of_property_read_u32(node, "maxim,brownout-timed-hold-ms",
+ &max98504->brownout_timed_hold);
+ of_property_read_u32(node, "maxim,brownout-release-rate-ms",
+ &max98504->brownout_release_rate);
+ }
+
+ max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
+ if (IS_ERR(max98504->regmap)) {
+ ret = PTR_ERR(max98504->regmap);
+ dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)
+ max98504->supplies[i].supply = max98504_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,
+ max98504->supplies);
+ if (ret < 0)
+ return ret;
+
+ i2c_set_clientdata(client, max98504);
+
+ return devm_snd_soc_register_component(dev, &max98504_component_driver,
+ max98504_dai, ARRAY_SIZE(max98504_dai));
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id max98504_of_match[] = {
+ { .compatible = "maxim,max98504" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, max98504_of_match);
+#endif
+
+static const struct i2c_device_id max98504_i2c_id[] = {
+ { "max98504" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);
+
+static struct i2c_driver max98504_i2c_driver = {
+ .driver = {
+ .name = "max98504",
+ .of_match_table = of_match_ptr(max98504_of_match),
+ },
+ .probe = max98504_i2c_probe,
+ .id_table = max98504_i2c_id,
+};
+module_i2c_driver(max98504_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC MAX98504 driver");
+MODULE_LICENSE("GPL");
git.samba.org / sfrench / cifs-2.6.git / commitdiff