--- /dev/null
+// SPDX-License-Identifier: GPL-2.0 //
+
+// Copyright (c) 2019 MediaTek Inc.
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/delay.h>
+#include <linux/debugfs.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include <sound/pcm_params.h>
+
+#include "mt6660.h"
+
+struct reg_size_table {
+ u32 addr;
+ u8 size;
+};
+
+static const struct reg_size_table mt6660_reg_size_table[] = {
+ { MT6660_REG_HPF1_COEF, 4 },
+ { MT6660_REG_HPF2_COEF, 4 },
+ { MT6660_REG_TDM_CFG3, 2 },
+ { MT6660_REG_RESV17, 2 },
+ { MT6660_REG_RESV23, 2 },
+ { MT6660_REG_SIGMAX, 2 },
+ { MT6660_REG_DEVID, 2 },
+ { MT6660_REG_HCLIP_CTRL, 2 },
+ { MT6660_REG_DA_GAIN, 2 },
+};
+
+static int mt6660_get_reg_size(uint32_t addr)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mt6660_reg_size_table); i++) {
+ if (mt6660_reg_size_table[i].addr == addr)
+ return mt6660_reg_size_table[i].size;
+ }
+ return 1;
+}
+
+static int mt6660_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+ struct mt6660_chip *chip = context;
+ int size = mt6660_get_reg_size(reg);
+ u8 reg_data[4];
+ int i, ret;
+
+ for (i = 0; i < size; i++)
+ reg_data[size - i - 1] = (val >> (8 * i)) & 0xff;
+
+ ret = i2c_smbus_write_i2c_block_data(chip->i2c, reg, size, reg_data);
+ return ret;
+}
+
+static int mt6660_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+ struct mt6660_chip *chip = context;
+ int size = mt6660_get_reg_size(reg);
+ int i, ret;
+ u8 data[4];
+ u32 reg_data = 0;
+
+ ret = i2c_smbus_read_i2c_block_data(chip->i2c, reg, size, data);
+ if (ret < 0)
+ return ret;
+ for (i = 0; i < size; i++) {
+ reg_data <<= 8;
+ reg_data |= data[i];
+ }
+ *val = reg_data;
+ return 0;
+}
+
+static const struct regmap_config mt6660_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 32,
+ .reg_write = mt6660_reg_write,
+ .reg_read = mt6660_reg_read,
+};
+
+static int mt6660_codec_dac_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ if (event == SND_SOC_DAPM_POST_PMU)
+ usleep_range(1000, 1100);
+ return 0;
+}
+
+static int mt6660_codec_classd_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_component *component =
+ snd_soc_dapm_to_component(w->dapm);
+ int ret;
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ dev_dbg(component->dev,
+ "%s: before classd turn on\n", __func__);
+ /* config to adaptive mode */
+ ret = snd_soc_component_update_bits(component,
+ MT6660_REG_BST_CTRL, 0x03, 0x03);
+ if (ret < 0) {
+ dev_err(component->dev, "config mode adaptive fail\n");
+ return ret;
+ }
+ break;
+ case SND_SOC_DAPM_POST_PMU:
+ /* voltage sensing enable */
+ ret = snd_soc_component_update_bits(component,
+ MT6660_REG_RESV7, 0x04, 0x04);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "enable voltage sensing fail\n");
+ return ret;
+ }
+ dev_dbg(component->dev, "Amp on\n");
+ break;
+ case SND_SOC_DAPM_PRE_PMD:
+ dev_dbg(component->dev, "Amp off\n");
+ /* voltage sensing disable */
+ ret = snd_soc_component_update_bits(component,
+ MT6660_REG_RESV7, 0x04, 0x00);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "disable voltage sensing fail\n");
+ return ret;
+ }
+ /* pop-noise improvement 1 */
+ ret = snd_soc_component_update_bits(component,
+ MT6660_REG_RESV10, 0x10, 0x10);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "pop-noise improvement 1 fail\n");
+ return ret;
+ }
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ dev_dbg(component->dev,
+ "%s: after classd turn off\n", __func__);
+ /* pop-noise improvement 2 */
+ ret = snd_soc_component_update_bits(component,
+ MT6660_REG_RESV10, 0x10, 0x00);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "pop-noise improvement 2 fail\n");
+ return ret;
+ }
+ /* config to off mode */
+ ret = snd_soc_component_update_bits(component,
+ MT6660_REG_BST_CTRL, 0x03, 0x00);
+ if (ret < 0) {
+ dev_err(component->dev, "config mode off fail\n");
+ return ret;
+ }
+ break;
+ }
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget mt6660_component_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC_E("DAC", NULL, MT6660_REG_PLL_CFG1,
+ 0, 1, mt6660_codec_dac_event, SND_SOC_DAPM_POST_PMU),
+ SND_SOC_DAPM_ADC("VI ADC", NULL, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_PGA("PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+ SND_SOC_DAPM_OUT_DRV_E("ClassD", MT6660_REG_SYSTEM_CTRL, 2, 0,
+ NULL, 0, mt6660_codec_classd_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
+ SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_OUTPUT("OUTP"),
+ SND_SOC_DAPM_OUTPUT("OUTN"),
+};
+
+static const struct snd_soc_dapm_route mt6660_component_dapm_routes[] = {
+ { "DAC", NULL, "aif_playback" },
+ { "PGA", NULL, "DAC" },
+ { "ClassD", NULL, "PGA" },
+ { "OUTP", NULL, "ClassD" },
+ { "OUTN", NULL, "ClassD" },
+ { "VI ADC", NULL, "ClassD" },
+ { "aif_capture", NULL, "VI ADC" },
+};
+
+static int mt6660_component_get_volsw(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component =
+ snd_soc_kcontrol_component(kcontrol);
+ struct mt6660_chip *chip = (struct mt6660_chip *)
+ snd_soc_component_get_drvdata(component);
+
+ ucontrol->value.integer.value[0] = chip->chip_rev & 0x0f;
+ return 0;
+}
+
+static const DECLARE_TLV_DB_SCALE(vol_ctl_tlv, -1155, 5, 0);
+
+static const struct snd_kcontrol_new mt6660_component_snd_controls[] = {
+ SOC_SINGLE_TLV("Digital Volume", MT6660_REG_VOL_CTRL, 0, 255,
+ 1, vol_ctl_tlv),
+ SOC_SINGLE("Hard Clip Switch", MT6660_REG_HCLIP_CTRL, 8, 1, 0),
+ SOC_SINGLE("Clip Switch", MT6660_REG_SPS_CTRL, 0, 1, 0),
+ SOC_SINGLE("Boost Mode", MT6660_REG_BST_CTRL, 0, 3, 0),
+ SOC_SINGLE("DRE Switch", MT6660_REG_DRE_CTRL, 0, 1, 0),
+ SOC_SINGLE("DC Protect Switch", MT6660_REG_DC_PROTECT_CTRL, 3, 1, 0),
+ SOC_SINGLE("Data Output Left Channel Selection",
+ MT6660_REG_DATAO_SEL, 3, 7, 0),
+ SOC_SINGLE("Data Output Right Channel Selection",
+ MT6660_REG_DATAO_SEL, 0, 7, 0),
+ SOC_SINGLE_EXT("T0 SEL", MT6660_REG_CALI_T0, 0, 7, 0,
+ snd_soc_get_volsw, NULL),
+ SOC_SINGLE_EXT("Chip Rev", MT6660_REG_DEVID, 8, 15, 0,
+ mt6660_component_get_volsw, NULL),
+};
+
+static int _mt6660_chip_power_on(struct mt6660_chip *chip, int on_off)
+{
+ return regmap_write_bits(chip->regmap, MT6660_REG_SYSTEM_CTRL,
+ 0x01, on_off ? 0x00 : 0x01);
+}
+
+static int mt6660_component_probe(struct snd_soc_component *component)
+{
+ struct mt6660_chip *chip = snd_soc_component_get_drvdata(component);
+
+ dev_dbg(component->dev, "%s\n", __func__);
+ snd_soc_component_init_regmap(component, chip->regmap);
+
+ return 0;
+}
+
+static void mt6660_component_remove(struct snd_soc_component *component)
+{
+ dev_dbg(component->dev, "%s\n", __func__);
+ snd_soc_component_exit_regmap(component);
+}
+
+static const struct snd_soc_component_driver mt6660_component_driver = {
+ .probe = mt6660_component_probe,
+ .remove = mt6660_component_remove,
+
+ .controls = mt6660_component_snd_controls,
+ .num_controls = ARRAY_SIZE(mt6660_component_snd_controls),
+ .dapm_widgets = mt6660_component_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(mt6660_component_dapm_widgets),
+ .dapm_routes = mt6660_component_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(mt6660_component_dapm_routes),
+
+ .idle_bias_on = false, /* idle_bias_off = true */
+};
+
+static int mt6660_component_aif_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params, struct snd_soc_dai *dai)
+{
+ int word_len = params_physical_width(hw_params);
+ int aud_bit = params_width(hw_params);
+ u16 reg_data = 0;
+ int ret;
+
+ dev_dbg(dai->dev, "%s: ++\n", __func__);
+ dev_dbg(dai->dev, "format: 0x%08x\n", params_format(hw_params));
+ dev_dbg(dai->dev, "rate: 0x%08x\n", params_rate(hw_params));
+ dev_dbg(dai->dev, "word_len: %d, aud_bit: %d\n", word_len, aud_bit);
+ if (word_len > 32 || word_len < 16) {
+ dev_err(dai->dev, "not supported word length\n");
+ return -ENOTSUPP;
+ }
+ switch (aud_bit) {
+ case 16:
+ reg_data = 3;
+ break;
+ case 18:
+ reg_data = 2;
+ break;
+ case 20:
+ reg_data = 1;
+ break;
+ case 24:
+ case 32:
+ reg_data = 0;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+ ret = snd_soc_component_update_bits(dai->component,
+ MT6660_REG_SERIAL_CFG1, 0xc0, (reg_data << 6));
+ if (ret < 0) {
+ dev_err(dai->dev, "config aud bit fail\n");
+ return ret;
+ }
+ ret = snd_soc_component_update_bits(dai->component,
+ MT6660_REG_TDM_CFG3, 0x3f0, word_len << 4);
+ if (ret < 0) {
+ dev_err(dai->dev, "config word len fail\n");
+ return ret;
+ }
+ dev_dbg(dai->dev, "%s: --\n", __func__);
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mt6660_component_aif_ops = {
+ .hw_params = mt6660_component_aif_hw_params,
+};
+
+#define STUB_RATES SNDRV_PCM_RATE_8000_192000
+#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_U16_LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_U24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE | \
+ SNDRV_PCM_FMTBIT_U32_LE)
+
+static struct snd_soc_dai_driver mt6660_codec_dai = {
+ .name = "mt6660-aif",
+ .playback = {
+ .stream_name = "aif_playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = STUB_RATES,
+ .formats = STUB_FORMATS,
+ },
+ .capture = {
+ .stream_name = "aif_capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = STUB_RATES,
+ .formats = STUB_FORMATS,
+ },
+ /* dai properties */
+ .symmetric_rates = 1,
+ .symmetric_channels = 1,
+ .symmetric_samplebits = 1,
+ /* dai operations */
+ .ops = &mt6660_component_aif_ops,
+};
+
+static int _mt6660_chip_id_check(struct mt6660_chip *chip)
+{
+ int ret;
+ unsigned int val;
+
+ ret = regmap_read(chip->regmap, MT6660_REG_DEVID, &val);
+ if (ret < 0)
+ return ret;
+ val &= 0x0ff0;
+ if (val != 0x00e0 && val != 0x01e0) {
+ dev_err(chip->dev, "%s id(%x) not match\n", __func__, val);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int _mt6660_chip_sw_reset(struct mt6660_chip *chip)
+{
+ int ret;
+
+ /* turn on main pll first, then trigger reset */
+ ret = regmap_write(chip->regmap, MT6660_REG_SYSTEM_CTRL, 0x00);
+ if (ret < 0)
+ return ret;
+ ret = regmap_write(chip->regmap, MT6660_REG_SYSTEM_CTRL, 0x80);
+ if (ret < 0)
+ return ret;
+ msleep(30);
+ return 0;
+}
+
+static int _mt6660_read_chip_revision(struct mt6660_chip *chip)
+{
+ int ret;
+ unsigned int val;
+
+ ret = regmap_read(chip->regmap, MT6660_REG_DEVID, &val);
+ if (ret < 0) {
+ dev_err(chip->dev, "get chip revision fail\n");
+ return ret;
+ }
+ chip->chip_rev = val&0xff;
+ dev_info(chip->dev, "%s chip_rev = %x\n", __func__, chip->chip_rev);
+ return 0;
+}
+
+static int mt6660_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mt6660_chip *chip = NULL;
+ int ret;
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+ chip->i2c = client;
+ chip->dev = &client->dev;
+ mutex_init(&chip->io_lock);
+ i2c_set_clientdata(client, chip);
+
+ chip->regmap = devm_regmap_init(&client->dev,
+ NULL, chip, &mt6660_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "failed to initialise regmap: %d\n", ret);
+ return ret;
+ }
+
+ /* chip reset first */
+ ret = _mt6660_chip_sw_reset(chip);
+ if (ret < 0) {
+ dev_err(chip->dev, "chip reset fail\n");
+ goto probe_fail;
+ }
+ /* chip power on */
+ ret = _mt6660_chip_power_on(chip, 1);
+ if (ret < 0) {
+ dev_err(chip->dev, "chip power on 2 fail\n");
+ goto probe_fail;
+ }
+ /* chip devid check */
+ ret = _mt6660_chip_id_check(chip);
+ if (ret < 0) {
+ dev_err(chip->dev, "chip id check fail\n");
+ goto probe_fail;
+ }
+ /* chip revision get */
+ ret = _mt6660_read_chip_revision(chip);
+ if (ret < 0) {
+ dev_err(chip->dev, "read chip revision fail\n");
+ goto probe_fail;
+ }
+ pm_runtime_set_active(chip->dev);
+ pm_runtime_enable(chip->dev);
+
+ ret = devm_snd_soc_register_component(chip->dev,
+ &mt6660_component_driver,
+ &mt6660_codec_dai, 1);
+ return ret;
+probe_fail:
+ _mt6660_chip_power_on(chip, 0);
+ mutex_destroy(&chip->io_lock);
+ return ret;
+}
+
+static int mt6660_i2c_remove(struct i2c_client *client)
+{
+ struct mt6660_chip *chip = i2c_get_clientdata(client);
+
+ pm_runtime_disable(chip->dev);
+ pm_runtime_set_suspended(chip->dev);
+ mutex_destroy(&chip->io_lock);
+ return 0;
+}
+
+static int __maybe_unused mt6660_i2c_runtime_suspend(struct device *dev)
+{
+ struct mt6660_chip *chip = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "enter low power mode\n");
+ return regmap_update_bits(chip->regmap,
+ MT6660_REG_SYSTEM_CTRL, 0x01, 0x01);
+}
+
+static int __maybe_unused mt6660_i2c_runtime_resume(struct device *dev)
+{
+ struct mt6660_chip *chip = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "exit low power mode\n");
+ return regmap_update_bits(chip->regmap,
+ MT6660_REG_SYSTEM_CTRL, 0x01, 0x00);
+}
+
+static const struct dev_pm_ops mt6660_dev_pm_ops = {
+ SET_RUNTIME_PM_OPS(mt6660_i2c_runtime_suspend,
+ mt6660_i2c_runtime_resume, NULL)
+};
+
+static const struct of_device_id __maybe_unused mt6660_of_id[] = {
+ { .compatible = "mediatek,mt6660",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, mt6660_of_id);
+
+static const struct i2c_device_id mt6660_i2c_id[] = {
+ {"mt6660", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, mt6660_i2c_id);
+
+static struct i2c_driver mt6660_i2c_driver = {
+ .driver = {
+ .name = "mt6660",
+ .of_match_table = of_match_ptr(mt6660_of_id),
+ .pm = &mt6660_dev_pm_ops,
+ },
+ .probe = mt6660_i2c_probe,
+ .remove = mt6660_i2c_remove,
+ .id_table = mt6660_i2c_id,
+};
+module_i2c_driver(mt6660_i2c_driver);
+
+MODULE_AUTHOR("Jeff Chang <jeff_chang@richtek.com>");
+MODULE_DESCRIPTION("MT6660 SPKAMP Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0.7_G");
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