Add an I2C based codec driver for ST TDA7802 amplifier. The amplifier supports 4 audio channels but can support up to 16 with multiple devices.
Signed-off-by: Thomas Preston <[email protected]> Cc: Patrick Glaser <[email protected]> Cc: Rob Duncan <[email protected]> Cc: Nate Case <[email protected]> --- Changes since v1: - Use ALSA kcontrol interface to expose device controls to userland - Gain - Channel diagnostic mode - Impedance efficiency optimiser. I decided against setting this as a DT property since it seems like something that can be changed on the fly. - Add regmap default values - Channel unmute by default is added in a downstream patch. - I'm not sure if I should keep this since they're all zero, although there are other drivers will all-zero reg_defaults. - I believe the "//" style is used for SPDX headers in normal C source files. https://lwn.net/Articles/739183/ - Drop the "enable" sysfs device attribute. - Don't set TDM format using magic numbers. - Set sample rate using hw_params. - Remove unecessary defines. - Use DAPM to handle AMP_ON. - Cosmetic fixups sound/soc/codecs/Kconfig | 6 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/tda7802.c | 509 +++++++++++++++++++++++++++++++++++++ 3 files changed, 517 insertions(+) create mode 100644 sound/soc/codecs/tda7802.c diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 9f89a5346299..7e3117eab735 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -182,6 +182,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_TAS5720 if I2C select SND_SOC_TAS6424 if I2C select SND_SOC_TDA7419 if I2C + select SND_SOC_TDA7802 if I2C select SND_SOC_TFA9879 if I2C select SND_SOC_TLV320AIC23_I2C if I2C select SND_SOC_TLV320AIC23_SPI if SPI_MASTER @@ -1121,6 +1122,11 @@ config SND_SOC_TDA7419 depends on I2C select REGMAP_I2C +config SND_SOC_TDA7802 + tristate "ST TDA7802 audio processor" + depends on I2C + select REGMAP_I2C + config SND_SOC_TFA9879 tristate "NXP Semiconductors TFA9879 amplifier" depends on I2C diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 5b4bb8cf4325..31dec8930e98 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -194,6 +194,7 @@ snd-soc-tas571x-objs := tas571x.o snd-soc-tas5720-objs := tas5720.o snd-soc-tas6424-objs := tas6424.o snd-soc-tda7419-objs := tda7419.o +snd-soc-tda7802-objs := tda7802.o snd-soc-tfa9879-objs := tfa9879.o snd-soc-tlv320aic23-objs := tlv320aic23.o snd-soc-tlv320aic23-i2c-objs := tlv320aic23-i2c.o @@ -474,6 +475,7 @@ obj-$(CONFIG_SND_SOC_TAS571X) += snd-soc-tas571x.o obj-$(CONFIG_SND_SOC_TAS5720) += snd-soc-tas5720.o obj-$(CONFIG_SND_SOC_TAS6424) += snd-soc-tas6424.o obj-$(CONFIG_SND_SOC_TDA7419) += snd-soc-tda7419.o +obj-$(CONFIG_SND_SOC_TDA7802) += snd-soc-tda7802.o obj-$(CONFIG_SND_SOC_TFA9879) += snd-soc-tfa9879.o obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o obj-$(CONFIG_SND_SOC_TLV320AIC23_I2C) += snd-soc-tlv320aic23-i2c.o diff --git a/sound/soc/codecs/tda7802.c b/sound/soc/codecs/tda7802.c new file mode 100644 index 000000000000..0f82a88bc1a4 --- /dev/null +++ b/sound/soc/codecs/tda7802.c @@ -0,0 +1,509 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * tda7802.c -- codec driver for ST TDA7802 + * + * Copyright (C) 2016-2019 Tesla Motors, Inc. + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/string.h> +#include <sound/control.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> + +#define ENABLE_DELAY_MS 10 + +#define TDA7802_IB0 0x00 +#define TDA7802_IB1 0x01 +#define TDA7802_IB2 0x02 +#define TDA7802_IB3 0x03 +#define TDA7802_IB4 0x04 +#define TDA7802_IB5 0x05 + +#define TDA7802_DB0 0x10 +#define TDA7802_DB5 0x15 + +#define IB2_DIGITAL_MUTE_DISABLED (1 << 2) + +#define IB3_SAMPLE_RATE_SHIFT 6 +#define IB3_SAMPLE_RATE_MASK (3 << IB3_SAMPLE_RATE_SHIFT) +#define IB3_SAMPLE_RATE_44_KHZ (0 << IB3_SAMPLE_RATE_SHIFT) +#define IB3_SAMPLE_RATE_48_KHZ (1 << IB3_SAMPLE_RATE_SHIFT) +#define IB3_SAMPLE_RATE_96_KHZ (2 << IB3_SAMPLE_RATE_SHIFT) +#define IB3_SAMPLE_RATE_192_KHZ (3 << IB3_SAMPLE_RATE_SHIFT) +#define IB3_FORMAT_SHIFT 3 +#define IB3_FORMAT_MASK (7 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_I2S (0 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM4 (1 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM8_DEV1 (2 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM8_DEV2 (3 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM16_DEV1 (4 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM16_DEV2 (5 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM16_DEV3 (6 << IB3_FORMAT_SHIFT) +#define IB3_FORMAT_TDM16_DEV4 (7 << IB3_FORMAT_SHIFT) + +enum tda7802_type { + tda7802_base, +}; + +struct tda7802_priv { + struct i2c_client *i2c; + struct regmap *regmap; + struct regulator *enable_reg; +}; + +static const struct reg_default tda7802_reg[] = { + { TDA7802_IB0, 0x0 }, + { TDA7802_IB1, 0x0 }, + { TDA7802_IB2, 0x0 }, + { TDA7802_IB3, 0x0 }, + { TDA7802_IB4, 0x0 }, + { TDA7802_IB5, 0x0 }, +}; + +static bool tda7802_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TDA7802_IB0 ... TDA7802_IB5: + case TDA7802_DB0 ... TDA7802_DB5: + return true; + default: + return false; + } +} + +static bool tda7802_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TDA7802_DB0 ... TDA7802_DB5: + return true; + default: + return false; + } +} + +static bool tda7802_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TDA7802_IB0 ... TDA7802_IB5: + return true; + default: + return false; + } +} + +static const struct regmap_config tda7802_regmap_config = { + .val_bits = 8, + .reg_bits = 8, + .max_register = TDA7802_DB5, + .use_single_read = 1, + .use_single_write = 1, + + .readable_reg = tda7802_readable_reg, + .volatile_reg = tda7802_volatile_reg, + .writeable_reg = tda7802_writeable_reg, + + .reg_defaults = tda7802_reg, + .num_reg_defaults = ARRAY_SIZE(tda7802_reg), + .cache_type = REGCACHE_RBTREE, +}; + +static int tda7802_digital_mute(struct snd_soc_dai *dai, int mute) +{ + const u8 mute_disabled = mute ? 0 : IB2_DIGITAL_MUTE_DISABLED; + struct device *dev = dai->dev; + int err; + + dev_dbg(dev, "%s mute=%d\n", __func__, mute); + + err = snd_soc_component_update_bits(dai->component, TDA7802_IB2, + IB2_DIGITAL_MUTE_DISABLED, mute_disabled); + if (err < 0) + dev_err(dev, "Cannot mute amp %d\n", err); + + return err; +} + +static int tda7802_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, int slot_width) +{ + struct device *dev = dai->dev; + u8 tdm_format; + int ret; + + dev_dbg(dai->dev, "%s tx %x, rx %x, slots %d, slot_width %d\n", + __func__, tx_mask, rx_mask, slots, slot_width); + + switch (slots) { + case 4: + tdm_format = IB3_FORMAT_TDM4; + break; + case 8: + switch (tx_mask) { + case 0x000f: + tdm_format = IB3_FORMAT_TDM8_DEV1; + break; + case 0x00f0: + tdm_format = IB3_FORMAT_TDM8_DEV2; + break; + default: + dev_err(dev, + "Failed to set tdm fmt, slots %d, tx_mask %x\n", + slots, tx_mask); + return -ENOTSUPP; + } + break; + case 16: + switch (tx_mask) { + case 0x000f: + tdm_format = IB3_FORMAT_TDM16_DEV1; + break; + case 0x00f0: + tdm_format = IB3_FORMAT_TDM16_DEV2; + break; + case 0x0f00: + tdm_format = IB3_FORMAT_TDM16_DEV3; + break; + case 0xf000: + tdm_format = IB3_FORMAT_TDM16_DEV4; + break; + default: + dev_err(dev, + "Failed to set tdm fmt, slots %d, tx_mask %x\n", + slots, tx_mask); + return -ENOTSUPP; + } + break; + default: + dev_err(dev, "Failed to set %d slots, supported: 4, 8, 16\n", + slots); + return -ENOTSUPP; + } + + ret = snd_soc_component_update_bits(dai->component, TDA7802_IB3, + IB3_FORMAT_MASK, tdm_format); + if (ret < 0) { + dev_err(dev, "Failed to write IB3 config %d\n", ret); + return ret; + } + + return 0; +} + +static int tda7802_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + int err; + u8 val; + + dev_dbg(dai->dev, "%s rate %d\n", __func__, params_rate(params)); + + switch (params_rate(params)) { + case 44100: + val = IB3_SAMPLE_RATE_44_KHZ; + break; + case 48000: + val = IB3_SAMPLE_RATE_48_KHZ; + break; + case 96000: + val = IB3_SAMPLE_RATE_96_KHZ; + break; + case 192000: + val = IB3_SAMPLE_RATE_192_KHZ; + break; + default: + return -EINVAL; + } + + err = snd_soc_component_update_bits(dai->component, TDA7802_IB3, + IB3_SAMPLE_RATE_MASK, val); + if (err < 0) + dev_err(dai->dev, "Could not set hw_params, %d\n", err); + + return err; +} + +static const struct snd_soc_dai_ops tda7802_dai_ops = { + .digital_mute = tda7802_digital_mute, + .hw_params = tda7802_hw_params, + .set_tdm_slot = tda7802_set_tdm_slot, +}; + +static struct snd_soc_dai_driver tda7802_dai_driver = { + .name = "tda7802", + .playback = { + .stream_name = "Playback", + .channels_min = 4, + .channels_max = 4, + .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000, + .formats = SNDRV_PCM_FMTBIT_S32_LE, + }, + .ops = &tda7802_dai_ops, +}; + +static int tda7802_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + const struct tda7802_priv *tda7802 = + snd_soc_component_get_drvdata(component); + struct snd_soc_dapm_context *dapm_context = + snd_soc_component_get_dapm(component); + const enum snd_soc_bias_level oldlevel = + snd_soc_dapm_get_bias_level(dapm_context); + int err = 0; + + dev_dbg(component->dev, "%s level %d\n", __func__, level); + + switch (level) { + case SND_SOC_BIAS_ON: + break; + case SND_SOC_BIAS_PREPARE: + break; + case SND_SOC_BIAS_STANDBY: + err = regulator_enable(tda7802->enable_reg); + if (err < 0) { + dev_err(component->dev, "Could not enable.\n"); + return err; + } + dev_dbg(component->dev, "Regulator enabled\n"); + msleep(ENABLE_DELAY_MS); + + if (oldlevel == SND_SOC_BIAS_OFF) { + dev_dbg(component->dev, "Syncing regcache\n"); + err = regcache_sync(component->regmap); + if (err < 0) + dev_err(component->dev, + "Could not sync regcache, %d\n", err); + } + break; + case SND_SOC_BIAS_OFF: + regcache_mark_dirty(component->regmap); + err = regulator_disable(tda7802->enable_reg); + if (err < 0) + dev_err(component->dev, "Could not disable.\n"); + break; + } + + return err; +} + +static const char * const amp_mode_str[] = { + "High Efficiency", + "Standard Class AB", +}; + +static SOC_ENUM_SINGLE_DECL(ch1_amp_mode, TDA7802_IB0, 0, amp_mode_str); +static SOC_ENUM_SINGLE_DECL(ch2_amp_mode, TDA7802_IB0, 1, amp_mode_str); +static SOC_ENUM_SINGLE_DECL(ch3_amp_mode, TDA7802_IB0, 2, amp_mode_str); +static SOC_ENUM_SINGLE_DECL(ch4_amp_mode, TDA7802_IB0, 3, amp_mode_str); + +static const char * const zopt_str[] = { + "2ohm", + "4ohm", +}; + +static SOC_ENUM_SINGLE_DECL(zopt_ch24, TDA7802_IB1, 7, zopt_str); +static SOC_ENUM_SINGLE_DECL(zopt_ch13, TDA7802_IB2, 0, zopt_str); + +static const char * const diag_timing_str[] = { + "default", + "x2", + "x4", + "x8", +}; + +static SOC_ENUM_SINGLE_DECL(diag_timing, TDA7802_IB1, 5, diag_timing_str); + +static const char * const mute_time_str[] = { + "1.45ms", + "5.8ms", + "11.6ms", + "23.2ms", + "46.4ms", + "92.8ms", + "185.6ms", + "371.2ms", +}; + +static SOC_ENUM_SINGLE_DECL(mute_time, TDA7802_IB2, 5, mute_time_str); + +static const char * const automute_threshold_str[] = { + "5.3V", + "7.3V", +}; + +static SOC_ENUM_SINGLE_DECL(automute_threshold, TDA7802_IB2, 1, + automute_threshold_str); + +static const char * const ac_diag_threshold_str[] = { + "High", + "Low", +}; + +static SOC_ENUM_SINGLE_DECL(ac_diag_threshold, TDA7802_IB3, 4, + ac_diag_threshold_str); + +static const char * const ch_diag_mode_str[] = { + "Speaker", + "Boosted", +}; + +static SOC_ENUM_SINGLE_DECL(diag_mode_ch13, TDA7802_IB4, 2, ch_diag_mode_str); +static SOC_ENUM_SINGLE_DECL(diag_mode_ch24, TDA7802_IB4, 1, ch_diag_mode_str); + +static const char * const temp_warn_str[] = { + "TW1", + "TW2", + "TW3", + "TW4", + "None", +}; + +static SOC_ENUM_SINGLE_DECL(temp_warn, TDA7802_IB5, 5, temp_warn_str); + +static const char * const clip_detect_str[] = { + "2%", + "5%", + "10%", + "None", +}; + +static SOC_ENUM_SINGLE_DECL(clip_detect_ch13, TDA7802_IB5, 3, clip_detect_str); +static SOC_ENUM_SINGLE_DECL(clip_detect_ch24, TDA7802_IB5, 1, clip_detect_str); + +static const struct snd_kcontrol_new tda7802_snd_controls[] = { + SOC_SINGLE("Channel 4 Tristate", TDA7802_IB0, 7, 1, 0), + SOC_SINGLE("Channel 3 Tristate", TDA7802_IB0, 6, 1, 0), + SOC_SINGLE("Channel 2 Tristate", TDA7802_IB0, 5, 1, 0), + SOC_SINGLE("Channel 1 Tristate", TDA7802_IB0, 4, 1, 0), + SOC_ENUM("Channel 4 Amplifier Mode", ch4_amp_mode), + SOC_ENUM("Channel 3 Amplifier Mode", ch3_amp_mode), + SOC_ENUM("Channel 2 Amplifier Mode", ch2_amp_mode), + SOC_ENUM("Channel 1 Amplifier Mode", ch1_amp_mode), + + /* Impedance (Z) efficiency optimiser */ + SOC_ENUM("Z efficiency opt channels 2 & 4", zopt_ch24), + SOC_ENUM("Z efficiency opt channels 1 & 3", zopt_ch13), + + SOC_ENUM("Long diag config timing", diag_timing), + SOC_SINGLE_RANGE("Gain channels 1 & 3", TDA7802_IB1, 3, 0, 3, 0), + SOC_SINGLE_RANGE("Gain channels 2 & 4", TDA7802_IB1, 1, 0, 3, 0), + SOC_SINGLE("Digital gain boost +6db", TDA7802_IB1, 0, 1, 0), + + /* Mute settings */ + SOC_ENUM("Mute time", mute_time), + SOC_SINGLE("Unmute channels 1 & 3", TDA7802_IB2, 4, 1, 0), + SOC_SINGLE("Unmute channels 2 & 4", TDA7802_IB2, 3, 1, 0), + SOC_ENUM("Automute threshold", automute_threshold), + + SOC_SINGLE("High pass filter enable", TDA7802_IB3, 0, 1, 0), + + /* Interactive diagnostics */ + SOC_SINGLE("Noise gating func enable", TDA7802_IB4, 7, 1, 1), + SOC_SINGLE("CDdiag: short fault", TDA7802_IB4, 6, 1, 1), + SOC_SINGLE("CDdiag: offset", TDA7802_IB4, 5, 1, 1), + SOC_ENUM("CDdiag: temperature warning", temp_warn), + SOC_ENUM("AC diag current threshold", ac_diag_threshold), + SOC_SINGLE("AC diag enable", TDA7802_IB4, 3, 1, 0), + SOC_ENUM("Diag mode channels 1 & 3", diag_mode_ch13), + SOC_ENUM("Diag mode channels 2 & 4", diag_mode_ch24), + SOC_SINGLE("Diag mode enable", TDA7802_IB4, 0, 1, 0), + + SOC_ENUM("Clipping detect channels 1 & 3", clip_detect_ch13), + SOC_ENUM("Clipping detect channels 2 & 4", clip_detect_ch24), +}; + +static const struct snd_soc_dapm_widget tda7802_dapm_widgets[] = { + SND_SOC_DAPM_AIF_IN("AIFIN", NULL, 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_DAC("DAC", NULL, TDA7802_IB5, 0, 0), + SND_SOC_DAPM_OUTPUT("SPK"), +}; + +static const struct snd_soc_dapm_route tda7802_dapm_routes[] = { + { "AIFIN", NULL, "Playback" }, + { "DAC", NULL, "AIFIN" }, + { "SPK", NULL, "DAC" }, +}; + +static const struct snd_soc_component_driver tda7802_component_driver = { + .set_bias_level = tda7802_set_bias_level, + .idle_bias_on = 1, + .suspend_bias_off = 1, + .controls = tda7802_snd_controls, + .num_controls = ARRAY_SIZE(tda7802_snd_controls), + .dapm_widgets = tda7802_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(tda7802_dapm_widgets), + .dapm_routes = tda7802_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(tda7802_dapm_routes), +}; + +static int tda7802_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct device *dev = &i2c->dev; + struct tda7802_priv *tda7802; + int err; + + dev_dbg(dev, "%s addr=0x%02hx, id %p\n", __func__, i2c->addr, id); + + tda7802 = devm_kmalloc(dev, sizeof(*tda7802), GFP_KERNEL); + if (!tda7802) + return -ENOMEM; + + i2c_set_clientdata(i2c, tda7802); + tda7802->i2c = i2c; + + tda7802->enable_reg = devm_regulator_get(dev, "enable"); + if (IS_ERR(tda7802->enable_reg)) { + dev_err(dev, "Failed to get enable regulator\n"); + return PTR_ERR(tda7802->enable_reg); + } + + tda7802->regmap = devm_regmap_init_i2c(tda7802->i2c, + &tda7802_regmap_config); + if (IS_ERR(tda7802->regmap)) + return PTR_ERR(tda7802->regmap); + + err = devm_snd_soc_register_component(dev, &tda7802_component_driver, + &tda7802_dai_driver, 1); + if (err < 0) + dev_err(dev, "Failed to register codec: %d\n", err); + return err; +} + +#ifdef CONFIG_OF +static const struct of_device_id tda7802_of_match[] = { + { .compatible = "st,tda7802" }, + { }, +}; +MODULE_DEVICE_TABLE(of, tda7802_of_match); +#endif + +static const struct i2c_device_id tda7802_i2c_id[] = { + { "tda7802", tda7802_base }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, tda7802_i2c_id); + +static struct i2c_driver tda7802_i2c_driver = { + .driver = { + .name = "tda7802-codec", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(tda7802_of_match), + }, + .probe = tda7802_i2c_probe, + .id_table = tda7802_i2c_id, +}; +module_i2c_driver(tda7802_i2c_driver); + +MODULE_DESCRIPTION("ASoC ST TDA7802 driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Rob Duncan <[email protected]>"); +MODULE_AUTHOR("Thomas Preston <[email protected]>"); -- 2.21.0
