| /* |
| * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier |
| * |
| * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com |
| * |
| * Author: Dan Murphy <dmurphy@ti.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. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/device.h> |
| #include <linux/i2c.h> |
| #include <linux/gpio.h> |
| #include <linux/of_gpio.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/regmap.h> |
| #include <linux/slab.h> |
| |
| #include <linux/gpio/consumer.h> |
| #include <linux/regulator/consumer.h> |
| |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc.h> |
| #include <sound/soc-dapm.h> |
| #include <sound/tlv.h> |
| #include <sound/tas2552-plat.h> |
| |
| #include "tas2552.h" |
| |
| static struct reg_default tas2552_reg_defs[] = { |
| {TAS2552_CFG_1, 0x22}, |
| {TAS2552_CFG_3, 0x80}, |
| {TAS2552_DOUT, 0x00}, |
| {TAS2552_OUTPUT_DATA, 0xc0}, |
| {TAS2552_PDM_CFG, 0x01}, |
| {TAS2552_PGA_GAIN, 0x00}, |
| {TAS2552_BOOST_PT_CTRL, 0x0f}, |
| {TAS2552_RESERVED_0D, 0x00}, |
| {TAS2552_LIMIT_RATE_HYS, 0x08}, |
| {TAS2552_CFG_2, 0xef}, |
| {TAS2552_SER_CTRL_1, 0x00}, |
| {TAS2552_SER_CTRL_2, 0x00}, |
| {TAS2552_PLL_CTRL_1, 0x10}, |
| {TAS2552_PLL_CTRL_2, 0x00}, |
| {TAS2552_PLL_CTRL_3, 0x00}, |
| {TAS2552_BTIP, 0x8f}, |
| {TAS2552_BTS_CTRL, 0x80}, |
| {TAS2552_LIMIT_RELEASE, 0x04}, |
| {TAS2552_LIMIT_INT_COUNT, 0x00}, |
| {TAS2552_EDGE_RATE_CTRL, 0x40}, |
| {TAS2552_VBAT_DATA, 0x00}, |
| }; |
| |
| #define TAS2552_NUM_SUPPLIES 3 |
| static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = { |
| "vbat", /* vbat voltage */ |
| "iovdd", /* I/O Voltage */ |
| "avdd", /* Analog DAC Voltage */ |
| }; |
| |
| struct tas2552_data { |
| struct snd_soc_codec *codec; |
| struct regmap *regmap; |
| struct i2c_client *tas2552_client; |
| struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES]; |
| struct gpio_desc *enable_gpio; |
| unsigned char regs[TAS2552_VBAT_DATA]; |
| unsigned int mclk; |
| }; |
| |
| /* Input mux controls */ |
| static const char *tas2552_input_texts[] = { |
| "Digital", "Analog" |
| }; |
| |
| static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7, |
| tas2552_input_texts); |
| |
| static const struct snd_kcontrol_new tas2552_input_mux_control[] = { |
| SOC_DAPM_ENUM("Input selection", tas2552_input_mux_enum) |
| }; |
| |
| static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] = |
| { |
| SND_SOC_DAPM_INPUT("IN"), |
| |
| /* MUX Controls */ |
| SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0, |
| tas2552_input_mux_control), |
| |
| SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0), |
| SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0), |
| SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0), |
| SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0), |
| |
| SND_SOC_DAPM_OUTPUT("OUT") |
| }; |
| |
| static const struct snd_soc_dapm_route tas2552_audio_map[] = { |
| {"DAC", NULL, "DAC IN"}, |
| {"Input selection", "Digital", "DAC"}, |
| {"Input selection", "Analog", "IN"}, |
| {"ClassD", NULL, "Input selection"}, |
| {"OUT", NULL, "ClassD"}, |
| {"ClassD", NULL, "PLL"}, |
| }; |
| |
| #ifdef CONFIG_PM_RUNTIME |
| static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown) |
| { |
| u8 cfg1_reg; |
| |
| if (sw_shutdown) |
| cfg1_reg = 0; |
| else |
| cfg1_reg = TAS2552_SWS_MASK; |
| |
| snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1, |
| TAS2552_SWS_MASK, cfg1_reg); |
| } |
| #endif |
| |
| static int tas2552_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 tas2552_data *tas2552 = dev_get_drvdata(codec->dev); |
| int sample_rate, pll_clk; |
| int d; |
| u8 p, j; |
| |
| if (!tas2552->mclk) |
| return -EINVAL; |
| |
| snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0); |
| |
| if (tas2552->mclk == TAS2552_245MHZ_CLK || |
| tas2552->mclk == TAS2552_225MHZ_CLK) { |
| /* By pass the PLL configuration */ |
| snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2, |
| TAS2552_PLL_BYPASS_MASK, |
| TAS2552_PLL_BYPASS); |
| } else { |
| /* Fill in the PLL control registers for J & D |
| * PLL_CLK = (.5 * freq * J.D) / 2^p |
| * Need to fill in J and D here based on incoming freq |
| */ |
| p = snd_soc_read(codec, TAS2552_PLL_CTRL_1); |
| p = (p >> 7); |
| sample_rate = params_rate(params); |
| |
| if (sample_rate == 48000) |
| pll_clk = TAS2552_245MHZ_CLK; |
| else if (sample_rate == 44100) |
| pll_clk = TAS2552_225MHZ_CLK; |
| else { |
| dev_vdbg(codec->dev, "Substream sample rate is not found %i\n", |
| params_rate(params)); |
| return -EINVAL; |
| } |
| |
| j = (pll_clk * 2 * (1 << p)) / tas2552->mclk; |
| d = (pll_clk * 2 * (1 << p)) % tas2552->mclk; |
| |
| snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1, |
| TAS2552_PLL_J_MASK, j); |
| snd_soc_write(codec, TAS2552_PLL_CTRL_2, |
| (d >> 7) & TAS2552_PLL_D_UPPER_MASK); |
| snd_soc_write(codec, TAS2552_PLL_CTRL_3, |
| d & TAS2552_PLL_D_LOWER_MASK); |
| |
| } |
| |
| return 0; |
| } |
| |
| static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
| { |
| struct snd_soc_codec *codec = dai->codec; |
| u8 serial_format; |
| u8 serial_control_mask; |
| |
| switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| case SND_SOC_DAIFMT_CBS_CFS: |
| serial_format = 0x00; |
| break; |
| case SND_SOC_DAIFMT_CBS_CFM: |
| serial_format = TAS2552_WORD_CLK_MASK; |
| break; |
| case SND_SOC_DAIFMT_CBM_CFS: |
| serial_format = TAS2552_BIT_CLK_MASK; |
| break; |
| case SND_SOC_DAIFMT_CBM_CFM: |
| serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK); |
| break; |
| default: |
| dev_vdbg(codec->dev, "DAI Format master is not found\n"); |
| return -EINVAL; |
| } |
| |
| serial_control_mask = TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK; |
| |
| switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| case SND_SOC_DAIFMT_I2S: |
| serial_format &= TAS2552_DAIFMT_I2S_MASK; |
| break; |
| case SND_SOC_DAIFMT_DSP_A: |
| serial_format |= TAS2552_DAIFMT_DSP; |
| break; |
| case SND_SOC_DAIFMT_RIGHT_J: |
| serial_format |= TAS2552_DAIFMT_RIGHT_J; |
| break; |
| case SND_SOC_DAIFMT_LEFT_J: |
| serial_format |= TAS2552_DAIFMT_LEFT_J; |
| break; |
| default: |
| dev_vdbg(codec->dev, "DAI Format is not found\n"); |
| return -EINVAL; |
| } |
| |
| if (fmt & SND_SOC_DAIFMT_FORMAT_MASK) |
| serial_control_mask |= TAS2552_DATA_FORMAT_MASK; |
| |
| snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_mask, |
| serial_format); |
| |
| return 0; |
| } |
| |
| static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, |
| unsigned int freq, int dir) |
| { |
| struct snd_soc_codec *codec = dai->codec; |
| struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev); |
| |
| tas2552->mclk = freq; |
| |
| return 0; |
| } |
| |
| static int tas2552_mute(struct snd_soc_dai *dai, int mute) |
| { |
| u8 cfg1_reg; |
| struct snd_soc_codec *codec = dai->codec; |
| |
| if (mute) |
| cfg1_reg = TAS2552_MUTE_MASK; |
| else |
| cfg1_reg = ~TAS2552_MUTE_MASK; |
| |
| snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_RUNTIME |
| static int tas2552_runtime_suspend(struct device *dev) |
| { |
| struct tas2552_data *tas2552 = dev_get_drvdata(dev); |
| |
| tas2552_sw_shutdown(tas2552, 0); |
| |
| regcache_cache_only(tas2552->regmap, true); |
| regcache_mark_dirty(tas2552->regmap); |
| |
| if (tas2552->enable_gpio) |
| gpiod_set_value(tas2552->enable_gpio, 0); |
| |
| return 0; |
| } |
| |
| static int tas2552_runtime_resume(struct device *dev) |
| { |
| struct tas2552_data *tas2552 = dev_get_drvdata(dev); |
| |
| if (tas2552->enable_gpio) |
| gpiod_set_value(tas2552->enable_gpio, 1); |
| |
| tas2552_sw_shutdown(tas2552, 1); |
| |
| regcache_cache_only(tas2552->regmap, false); |
| regcache_sync(tas2552->regmap); |
| |
| return 0; |
| } |
| #endif |
| |
| static const struct dev_pm_ops tas2552_pm = { |
| SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume, |
| NULL) |
| }; |
| |
| static struct snd_soc_dai_ops tas2552_speaker_dai_ops = { |
| .hw_params = tas2552_hw_params, |
| .set_sysclk = tas2552_set_dai_sysclk, |
| .set_fmt = tas2552_set_dai_fmt, |
| .digital_mute = tas2552_mute, |
| }; |
| |
| /* Formats supported by TAS2552 driver. */ |
| #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ |
| SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) |
| |
| /* TAS2552 dai structure. */ |
| static struct snd_soc_dai_driver tas2552_dai[] = { |
| { |
| .name = "tas2552-amplifier", |
| .playback = { |
| .stream_name = "Playback", |
| .channels_min = 2, |
| .channels_max = 2, |
| .rates = SNDRV_PCM_RATE_8000_192000, |
| .formats = TAS2552_FORMATS, |
| }, |
| .ops = &tas2552_speaker_dai_ops, |
| }, |
| }; |
| |
| /* |
| * DAC digital volumes. From -7 to 24 dB in 1 dB steps |
| */ |
| static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 24); |
| |
| static const struct snd_kcontrol_new tas2552_snd_controls[] = { |
| SOC_SINGLE_TLV("Speaker Driver Playback Volume", |
| TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv), |
| SOC_DAPM_SINGLE("Playback AMP", SND_SOC_NOPM, 0, 1, 0), |
| }; |
| |
| static const struct reg_default tas2552_init_regs[] = { |
| { TAS2552_RESERVED_0D, 0xc0 }, |
| }; |
| |
| static int tas2552_codec_probe(struct snd_soc_codec *codec) |
| { |
| struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec); |
| int ret; |
| |
| tas2552->codec = codec; |
| |
| ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies), |
| tas2552->supplies); |
| |
| if (ret != 0) { |
| dev_err(codec->dev, "Failed to enable supplies: %d\n", |
| ret); |
| return ret; |
| } |
| |
| if (tas2552->enable_gpio) |
| gpiod_set_value(tas2552->enable_gpio, 1); |
| |
| ret = pm_runtime_get_sync(codec->dev); |
| if (ret < 0) { |
| dev_err(codec->dev, "Enabling device failed: %d\n", |
| ret); |
| goto probe_fail; |
| } |
| |
| snd_soc_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK | |
| TAS2552_PLL_SRC_BCLK); |
| snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL | |
| TAS2552_DIN_SRC_SEL_AVG_L_R | TAS2552_88_96KHZ); |
| snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I); |
| snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I | 0x8); |
| snd_soc_write(codec, TAS2552_PDM_CFG, TAS2552_PDM_BCLK_SEL); |
| snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 | |
| TAS2552_APT_THRESH_2_1_7); |
| |
| ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs, |
| ARRAY_SIZE(tas2552_init_regs)); |
| if (ret != 0) { |
| dev_err(codec->dev, "Failed to write init registers: %d\n", |
| ret); |
| goto patch_fail; |
| } |
| |
| snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN | |
| TAS2552_APT_EN | TAS2552_LIM_EN); |
| |
| return 0; |
| |
| patch_fail: |
| pm_runtime_put(codec->dev); |
| probe_fail: |
| if (tas2552->enable_gpio) |
| gpiod_set_value(tas2552->enable_gpio, 0); |
| |
| regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies), |
| tas2552->supplies); |
| return -EIO; |
| } |
| |
| static int tas2552_codec_remove(struct snd_soc_codec *codec) |
| { |
| struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec); |
| |
| pm_runtime_put(codec->dev); |
| |
| if (tas2552->enable_gpio) |
| gpiod_set_value(tas2552->enable_gpio, 0); |
| |
| return 0; |
| }; |
| |
| #ifdef CONFIG_PM |
| static int tas2552_suspend(struct snd_soc_codec *codec) |
| { |
| struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec); |
| int ret; |
| |
| ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies), |
| tas2552->supplies); |
| |
| if (ret != 0) |
| dev_err(codec->dev, "Failed to disable supplies: %d\n", |
| ret); |
| return 0; |
| } |
| |
| static int tas2552_resume(struct snd_soc_codec *codec) |
| { |
| struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec); |
| int ret; |
| |
| ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies), |
| tas2552->supplies); |
| |
| if (ret != 0) { |
| dev_err(codec->dev, "Failed to enable supplies: %d\n", |
| ret); |
| } |
| |
| return 0; |
| } |
| #else |
| #define tas2552_suspend NULL |
| #define tas2552_resume NULL |
| #endif |
| |
| static struct snd_soc_codec_driver soc_codec_dev_tas2552 = { |
| .probe = tas2552_codec_probe, |
| .remove = tas2552_codec_remove, |
| .suspend = tas2552_suspend, |
| .resume = tas2552_resume, |
| .controls = tas2552_snd_controls, |
| .num_controls = ARRAY_SIZE(tas2552_snd_controls), |
| .dapm_widgets = tas2552_dapm_widgets, |
| .num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets), |
| .dapm_routes = tas2552_audio_map, |
| .num_dapm_routes = ARRAY_SIZE(tas2552_audio_map), |
| }; |
| |
| static const struct regmap_config tas2552_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| |
| .max_register = TAS2552_MAX_REG, |
| .reg_defaults = tas2552_reg_defs, |
| .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs), |
| .cache_type = REGCACHE_RBTREE, |
| }; |
| |
| static int tas2552_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct device *dev; |
| struct tas2552_data *data; |
| int ret; |
| int i; |
| |
| dev = &client->dev; |
| data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
| if (data == NULL) |
| return -ENOMEM; |
| |
| data->enable_gpio = devm_gpiod_get(dev, "enable"); |
| if (IS_ERR(data->enable_gpio)) { |
| ret = PTR_ERR(data->enable_gpio); |
| if (ret != -ENOENT && ret != -ENOSYS) |
| return ret; |
| |
| data->enable_gpio = NULL; |
| } else { |
| gpiod_direction_output(data->enable_gpio, 0); |
| } |
| |
| data->tas2552_client = client; |
| data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config); |
| if (IS_ERR(data->regmap)) { |
| ret = PTR_ERR(data->regmap); |
| dev_err(&client->dev, "Failed to allocate register map: %d\n", |
| ret); |
| return ret; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(data->supplies); i++) |
| data->supplies[i].supply = tas2552_supply_names[i]; |
| |
| ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies), |
| data->supplies); |
| if (ret != 0) { |
| dev_err(dev, "Failed to request supplies: %d\n", ret); |
| return ret; |
| } |
| |
| pm_runtime_set_active(&client->dev); |
| pm_runtime_set_autosuspend_delay(&client->dev, 1000); |
| pm_runtime_use_autosuspend(&client->dev); |
| pm_runtime_enable(&client->dev); |
| pm_runtime_mark_last_busy(&client->dev); |
| pm_runtime_put_sync_autosuspend(&client->dev); |
| |
| dev_set_drvdata(&client->dev, data); |
| |
| ret = snd_soc_register_codec(&client->dev, |
| &soc_codec_dev_tas2552, |
| tas2552_dai, ARRAY_SIZE(tas2552_dai)); |
| if (ret < 0) |
| dev_err(&client->dev, "Failed to register codec: %d\n", ret); |
| |
| return ret; |
| } |
| |
| static int tas2552_i2c_remove(struct i2c_client *client) |
| { |
| snd_soc_unregister_codec(&client->dev); |
| return 0; |
| } |
| |
| static const struct i2c_device_id tas2552_id[] = { |
| { "tas2552", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, tas2552_id); |
| |
| #if IS_ENABLED(CONFIG_OF) |
| static const struct of_device_id tas2552_of_match[] = { |
| { .compatible = "ti,tas2552", }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, tas2552_of_match); |
| #endif |
| |
| static struct i2c_driver tas2552_i2c_driver = { |
| .driver = { |
| .name = "tas2552", |
| .owner = THIS_MODULE, |
| .of_match_table = of_match_ptr(tas2552_of_match), |
| .pm = &tas2552_pm, |
| }, |
| .probe = tas2552_probe, |
| .remove = tas2552_i2c_remove, |
| .id_table = tas2552_id, |
| }; |
| |
| module_i2c_driver(tas2552_i2c_driver); |
| |
| MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>"); |
| MODULE_DESCRIPTION("TAS2552 Audio amplifier driver"); |
| MODULE_LICENSE("GPL"); |