[alsa-devel] [PATCH v2 2/2] ASoC: add support for TAS6424 digital amplifier

From: Andreas Dannenberg dannenberg@ti.com

The Texas Instruments TAS6424 device is a high-efficiency quad-channel Class-D audio power amplifier. Its digital time division multiplexed (TDM) interface enables up to 2 devices to share the same bus, supporting a total of eight channels from one audio serial port.

This is an initial version of the driver that does not yet support all device capabilities.

Signed-off-by: Andreas Dannenberg dannenberg@ti.com Signed-off-by: Michael Stecklein m-stecklein@ti.com --- sound/soc/codecs/Kconfig | 8 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/tas6424.c | 755 +++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/tas6424.h | 127 ++++++++ 4 files changed, 892 insertions(+) create mode 100644 sound/soc/codecs/tas6424.c create mode 100644 sound/soc/codecs/tas6424.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 6c78b0b..d1fd4a3 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -146,6 +146,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_TAS5086 if I2C select SND_SOC_TAS571X if I2C select SND_SOC_TAS5720 if I2C + select SND_SOC_TAS6424 if I2C select SND_SOC_TFA9879 if I2C select SND_SOC_TLV320AIC23_I2C if I2C select SND_SOC_TLV320AIC23_SPI if SPI_MASTER @@ -865,6 +866,13 @@ config SND_SOC_TAS5720 Enable support for Texas Instruments TAS5720L/M high-efficiency mono Class-D audio power amplifiers.

+config SND_SOC_TAS6424 + tristate "Texas Instruments TAS6424 Quad-Channel Audio amplifier" + depends on I2C + help + Enable support for Texas Instruments TAS6424 high-efficiency + digital input quad-channel Class-D audio power amplifiers. + 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 1755a54..cb03793 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -153,6 +153,7 @@ snd-soc-sti-sas-objs := sti-sas.o snd-soc-tas5086-objs := tas5086.o snd-soc-tas571x-objs := tas571x.o snd-soc-tas5720-objs := tas5720.o +snd-soc-tas6424-objs := tas6424.o snd-soc-tfa9879-objs := tfa9879.o snd-soc-tlv320aic23-objs := tlv320aic23.o snd-soc-tlv320aic23-i2c-objs := tlv320aic23-i2c.o @@ -386,6 +387,7 @@ obj-$(CONFIG_SND_SOC_TAS2552) += snd-soc-tas2552.o obj-$(CONFIG_SND_SOC_TAS5086) += snd-soc-tas5086.o 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_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/tas6424.c b/sound/soc/codecs/tas6424.c new file mode 100644 index 0000000..2dd97e2 --- /dev/null +++ b/sound/soc/codecs/tas6424.c @@ -0,0 +1,755 @@ +/* + * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier + * + * Copyright (C)2016 Texas Instruments Incorporated - http://www.ti.com + * Andreas Dannenberg dannenberg@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/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/regulator/consumer.h> +#include <linux/delay.h> + +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/tlv.h> + +#include "tas6424.h" + +/* Define how often to check (and clear) the fault status register (in ms) */ +#define TAS6424_FAULT_CHECK_INTERVAL 200 + +static const char * const tas6424_supply_names[] = { + "dvdd", /* Digital power supply. Connect to 3.3-V supply. */ + "vbat", /* Supply used for higher voltage analog circuits. */ + "pvdd", /* Class-D amp output FETs supply. */ +}; + +#define TAS6424_NUM_SUPPLIES ARRAY_SIZE(tas6424_supply_names) + +struct tas6424_data { + struct snd_soc_codec *codec; + struct regmap *regmap; + struct i2c_client *tas6424_client; + struct regulator_bulk_data supplies[TAS6424_NUM_SUPPLIES]; + struct delayed_work fault_check_work; + unsigned int last_fault1; + unsigned int last_fault2; + unsigned int last_warn; +}; + +static int tas6424_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; + unsigned int rate = params_rate(params); + unsigned int width = params_width(params); + u8 sap_ctrl; + int ret; + + dev_dbg(codec->dev, "%s() rate=%u width=%u\n", __func__, rate, width); + + switch (rate) { + case 44100: + sap_ctrl = TAS6424_SAP_RATE_44100; + break; + case 48000: + sap_ctrl = TAS6424_SAP_RATE_48000; + break; + case 96000: + sap_ctrl = TAS6424_SAP_RATE_96000; + break; + default: + dev_err(codec->dev, "unsupported sample rate: %u\n", rate); + return -EINVAL; + } + + switch (width) { + case 16: + sap_ctrl |= TAS6424_SAP_TDM_SLOT_SZ_16; + break; + case 24: + case 32: + break; + default: + dev_err(codec->dev, "unsupported sample width: %u\n", width); + return -EINVAL; + } + + ret = snd_soc_update_bits(codec, TAS6424_SAP_CTRL_REG, + TAS6424_SAP_RATE_MASK, sap_ctrl); + if (ret < 0) { + dev_err(codec->dev, "error setting sample rate: %d\n", ret); + return ret; + } + + return 0; +} + +static int tas6424_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct snd_soc_codec *codec = dai->codec; + u8 serial_format; + int ret; + + dev_dbg(codec->dev, "%s() fmt=0x%0x\n", __func__, fmt); + + if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { + dev_vdbg(codec->dev, "DAI Format master is not found\n"); + return -EINVAL; + } + + switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK | + SND_SOC_DAIFMT_INV_MASK)) { + case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF): + /* 1st data bit occur one BCLK cycle after the frame sync */ + serial_format = TAS6424_SAP_I2S; + break; + case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF): + /* + * DSP_A format means that the first data bit is delayed. For + * this, invoke the dedicated DSP mode of the TAS6424. See + * device datasheet for additional details on the signal + * formatting. + */ + serial_format = TAS6424_SAP_DSP; + break; + case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF): + /* + * We can use the fact that the TAS6424 does not care about the + * LRCLK duty cycle during TDM to receive DSP_B formatted data + * in LEFTJ mode (no delaying of the 1st data bit). + */ + serial_format = TAS6424_SAP_LEFTJ; + break; + case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF): + /* No delay after the frame sync */ + serial_format = TAS6424_SAP_LEFTJ; + break; + default: + dev_vdbg(codec->dev, "DAI Format is not found\n"); + return -EINVAL; + } + + ret = snd_soc_update_bits(codec, TAS6424_SAP_CTRL_REG, + TAS6424_SAP_FMT_MASK, + serial_format); + if (ret < 0) { + dev_err(codec->dev, "error setting SAIF format: %d\n", ret); + return ret; + } + + return 0; +} + +static int tas6424_set_dai_tdm_slot(struct snd_soc_dai *dai, + unsigned int tx_mask, unsigned int rx_mask, + int slots, int slot_width) +{ + struct snd_soc_codec *codec = dai->codec; + unsigned int first_slot, last_slot; + bool sap_tdm_slot_last; + int ret; + + dev_dbg(codec->dev, "%s() tx_mask=%d rx_mask=%d\n", __func__, + tx_mask, rx_mask); + + if (!tx_mask) { + dev_err(codec->dev, "tdm mask must not be 0\n"); + return -EINVAL; + } + + /* + * Determine the first slot and last slot that is being requested so + * we'll be able to more easily enforce certain constraints as the + * TAS6424's TDM interface is not fully configurable. + */ + first_slot = __ffs(tx_mask); + last_slot = __fls(rx_mask); + + if (last_slot - first_slot != 4) { + dev_err(codec->dev, "tdm mask must cover 4 contiguous slots\n"); + return -EINVAL; + } + + switch (first_slot) { + case 0: + sap_tdm_slot_last = false; + break; + case 4: + sap_tdm_slot_last = true; + break; + default: + dev_err(codec->dev, "tdm mask must start at slot 0 or 4\n"); + return -EINVAL; + } + + /* Configure the TDM slots to process audio from */ + ret = snd_soc_update_bits(codec, TAS6424_SAP_CTRL_REG, + TAS6424_SAP_TDM_SLOT_LAST, + sap_tdm_slot_last ? TAS6424_SAP_TDM_SLOT_LAST : 0); + if (ret < 0) { + dev_err(codec->dev, "error configuring TDM mode: %d\n", ret); + return ret; + } + + return 0; +} + +static int tas6424_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_codec *codec = dai->codec; + unsigned int val; + int ret; + + dev_dbg(codec->dev, "%s() mute=%d\n", __func__, mute); + + if (mute) + val = TAS6424_CH1_STATE_MUTE | TAS6424_CH2_STATE_MUTE | + TAS6424_CH3_STATE_MUTE | TAS6424_CH4_STATE_MUTE; + else + val = TAS6424_CH1_STATE_PLAY | TAS6424_CH2_STATE_PLAY | + TAS6424_CH3_STATE_PLAY | TAS6424_CH4_STATE_PLAY; + + ret = snd_soc_update_bits(codec, TAS6424_CH_STATE_CTRL_REG, 0xff, val); + + if (ret < 0) { + dev_err(codec->dev, "error (un-)muting device: %d\n", ret); + return ret; + } + + return 0; +} + +static void tas6424_fault_check_work(struct work_struct *work) +{ + struct tas6424_data *tas6424 = container_of(work, struct tas6424_data, + fault_check_work.work); + struct device *dev = tas6424->codec->dev; + unsigned int reg; + int ret; + + ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT1_REG, &reg); + if (ret < 0) { + dev_err(dev, "failed to read FAULT1 register: %d\n", ret); + goto out; + } + + /* + * Ignore any clock faults as there is no clean way to check for them. + * We would need to start checking for those faults *after* the SAIF + * stream has been setup, and stop checking *before* the stream is + * stopped to avoid any false-positives. However there are no + * appropriate hooks to monitor these events. + */ + reg &= TAS6424_FAULT_PVDD_OV | TAS6424_FAULT_VBAT_OV | + TAS6424_FAULT_PVDD_UV | TAS6424_FAULT_VBAT_UV; + + if (reg) + goto check_global_fault2_reg; + + /* + * Only flag errors once for a given occurrence. This is needed as + * the TAS6424 will take time clearing the fault condition internally + * during which we don't want to bombard the system with the same + * error message over and over. + */ + if ((reg & TAS6424_FAULT_PVDD_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_OV)) + dev_crit(dev, "experienced a PVDD overvoltage fault\n"); + + if ((reg & TAS6424_FAULT_VBAT_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_OV)) + dev_crit(dev, "experienced a VBAT overvoltage fault\n"); + + if ((reg & TAS6424_FAULT_PVDD_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_UV)) + dev_crit(dev, "experienced a PVDD undervoltage fault\n"); + + if ((reg & TAS6424_FAULT_VBAT_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_UV)) + dev_crit(dev, "experienced a VBAT undervoltage fault\n"); + + /* Store current fault1 value so we can detect any changes next time */ + tas6424->last_fault1 = reg; + +check_global_fault2_reg: + ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT2_REG, &reg); + if (ret < 0) { + dev_err(dev, "failed to read FAULT2 register: %d\n", ret); + goto out; + } + + reg &= TAS6424_FAULT_OTSD | TAS6424_FAULT_OTSD_CH1 | + TAS6424_FAULT_OTSD_CH2 | TAS6424_FAULT_OTSD_CH3 | + TAS6424_FAULT_OTSD_CH4; + + if (!reg) + goto check_warn_reg; + + if ((reg & TAS6424_FAULT_OTSD) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD)) + dev_crit(dev, "experienced a global overtemp shutdown\n"); + + if ((reg & TAS6424_FAULT_OTSD_CH1) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH1)) + dev_crit(dev, "experienced an overtemp shutdown on CH1\n"); + + if ((reg & TAS6424_FAULT_OTSD_CH2) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH2)) + dev_crit(dev, "experienced an overtemp shutdown on CH2\n"); + + if ((reg & TAS6424_FAULT_OTSD_CH3) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH3)) + dev_crit(dev, "experienced an overtemp shutdown on CH3\n"); + + if ((reg & TAS6424_FAULT_OTSD_CH4) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH4)) + dev_crit(dev, "experienced an overtemp shutdown on CH4\n"); + + /* Store current fault2 value so we can detect any changes next time */ + tas6424->last_fault2 = reg; + +check_warn_reg: + ret = regmap_read(tas6424->regmap, TAS6424_WARN_REG, &reg); + if (ret < 0) { + dev_err(dev, "failed to read WARN register: %d\n", ret); + goto out; + } + + reg &= TAS6424_WARN_VDD_UV | TAS6424_WARN_VDD_POR | + TAS6424_WARN_VDD_OTW | TAS6424_WARN_VDD_OTW_CH1 | + TAS6424_WARN_VDD_OTW_CH2 | TAS6424_WARN_VDD_OTW_CH3 | + TAS6424_WARN_VDD_OTW_CH4; + + if (!reg) + goto out; + + if ((reg & TAS6424_WARN_VDD_UV) && !(tas6424->last_warn & TAS6424_WARN_VDD_UV)) + dev_warn(dev, "experienced a VDD under voltage condition\n"); + + if ((reg & TAS6424_WARN_VDD_POR) && !(tas6424->last_warn & TAS6424_WARN_VDD_POR)) + dev_warn(dev, "experienced a VDD POR condition\n"); + + if ((reg & TAS6424_WARN_VDD_OTW) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW)) + dev_warn(dev, "experienced a global overtemp warning\n"); + + if ((reg & TAS6424_WARN_VDD_OTW_CH1) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH1)) + dev_warn(dev, "experienced an overtemp warning on CH1\n"); + + if ((reg & TAS6424_WARN_VDD_OTW_CH2) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH2)) + dev_warn(dev, "experienced an overtemp warning on CH2\n"); + + if ((reg & TAS6424_WARN_VDD_OTW_CH3) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH3)) + dev_warn(dev, "experienced an overtemp warning on CH3\n"); + + if ((reg & TAS6424_WARN_VDD_OTW_CH4) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH4)) + dev_warn(dev, "experienced an overtemp warning on CH4\n"); + + /* Store current warn value so we can detect any changes next time */ + tas6424->last_warn = reg; + + /* Clear any faults by toggling the CLEAR_FAULT control bit */ + ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3_REG, + TAS6424_CLEAR_FAULT, TAS6424_CLEAR_FAULT); + if (ret < 0) + dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret); + + ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3_REG, + TAS6424_CLEAR_FAULT, 0); + if (ret < 0) + dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret); + +out: + /* Schedule the next fault check at the specified interval */ + schedule_delayed_work(&tas6424->fault_check_work, + msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL)); +} + +static int tas6424_codec_probe(struct snd_soc_codec *codec) +{ + struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); + int ret; + + tas6424->codec = codec; + + ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies), + tas6424->supplies); + if (ret != 0) { + dev_err(codec->dev, "failed to enable supplies: %d\n", ret); + return ret; + } + + /* Reset device to establish well-defined startup state */ + ret = snd_soc_update_bits(codec, TAS6424_MODE_CTRL_REG, + TAS6424_RESET, TAS6424_RESET); + if (ret < 0) + goto error_snd_soc_update_bits; + + /* Set device to Hi-Z mode to minimize current consumption. */ + ret = snd_soc_update_bits(codec, TAS6424_CH_STATE_CTRL_REG, 0xff, + TAS6424_CH1_STATE_HIZ | TAS6424_CH2_STATE_HIZ | + TAS6424_CH3_STATE_HIZ | TAS6424_CH4_STATE_HIZ); + if (ret < 0) + goto error_snd_soc_update_bits; + + INIT_DELAYED_WORK(&tas6424->fault_check_work, tas6424_fault_check_work); + + return 0; + +error_snd_soc_update_bits: + dev_err(codec->dev, "error configuring device registers: %d\n", ret); + + regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), + tas6424->supplies); + return ret; +} + +static int tas6424_codec_remove(struct snd_soc_codec *codec) +{ + struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); + int ret; + + cancel_delayed_work_sync(&tas6424->fault_check_work); + + ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), + tas6424->supplies); + if (ret < 0) + dev_err(codec->dev, "failed to disable supplies: %d\n", ret); + + return ret; +}; + +static int tas6424_dac_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); + struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); + + dev_dbg(codec->dev, "%s() event=0x%0x\n", __func__, event); + + if (event & SND_SOC_DAPM_POST_PMU) { + /* Observe codec shutdown-to-active time */ + msleep(12); + + /* Turn on TAS6424 periodic fault checking/handling */ + tas6424->last_fault1 = 0; + tas6424->last_fault2 = 0; + tas6424->last_warn = 0; + schedule_delayed_work(&tas6424->fault_check_work, + msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL)); + } else if (event & SND_SOC_DAPM_PRE_PMD) { + /* Disable TAS6424 periodic fault checking/handling */ + cancel_delayed_work_sync(&tas6424->fault_check_work); + } + + return 0; +} + +#ifdef CONFIG_PM +static int tas6424_suspend(struct snd_soc_codec *codec) +{ + struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); + int ret; + + regcache_cache_only(tas6424->regmap, true); + regcache_mark_dirty(tas6424->regmap); + + ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), + tas6424->supplies); + if (ret < 0) + dev_err(codec->dev, "failed to disable supplies: %d\n", ret); + + return ret; +} + +static int tas6424_resume(struct snd_soc_codec *codec) +{ + struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies), + tas6424->supplies); + if (ret < 0) { + dev_err(codec->dev, "failed to enable supplies: %d\n", ret); + return ret; + } + + regcache_cache_only(tas6424->regmap, false); + + ret = regcache_sync(tas6424->regmap); + if (ret < 0) { + dev_err(codec->dev, "failed to sync regcache: %d\n", ret); + return ret; + } + + return 0; +} +#else +#define tas6424_suspend NULL +#define tas6424_resume NULL +#endif + +static int tas6424_set_bias_level(struct snd_soc_codec *codec, + enum snd_soc_bias_level level) +{ + int ret; + + dev_dbg(codec->dev, "%s() level=%d\n", __func__, level); + + switch (level) { + case SND_SOC_BIAS_ON: + case SND_SOC_BIAS_PREPARE: + msleep(500); + break; + case SND_SOC_BIAS_STANDBY: + ret = snd_soc_update_bits(codec, TAS6424_CH_STATE_CTRL_REG, + 0xff, TAS6424_CH1_STATE_MUTE | TAS6424_CH2_STATE_MUTE | + TAS6424_CH3_STATE_MUTE | TAS6424_CH4_STATE_MUTE); + + if (ret < 0) { + dev_err(codec->dev, "error resuming device: %d\n", ret); + return ret; + } + break; + case SND_SOC_BIAS_OFF: + ret = snd_soc_update_bits(codec, TAS6424_CH_STATE_CTRL_REG, + 0xff, TAS6424_CH1_STATE_HIZ | TAS6424_CH2_STATE_HIZ | + TAS6424_CH3_STATE_HIZ | TAS6424_CH4_STATE_HIZ); + + if (ret < 0) { + dev_err(codec->dev, "error suspending device: %d\n", ret); + return ret; + } + break; + } + + return 0; +} + +static bool tas6424_is_writable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TAS6424_MODE_CTRL_REG: + case TAS6424_MISC_CTRL1_REG: + case TAS6424_MISC_CTRL2_REG: + case TAS6424_SAP_CTRL_REG: + case TAS6424_CH_STATE_CTRL_REG: + case TAS6424_CH1_VOL_CTRL_REG: + case TAS6424_CH2_VOL_CTRL_REG: + case TAS6424_CH3_VOL_CTRL_REG: + case TAS6424_CH4_VOL_CTRL_REG: + case TAS6424_DC_DIAG_CTRL1_REG: + case TAS6424_DC_DIAG_CTRL2_REG: + case TAS6424_DC_DIAG_CTRL3_REG: + case TAS6424_PIN_CTRL_REG: + case TAS6424_AC_DIAG_CTRL_REG: + case TAS6424_MISC_CTRL3_REG: + case TAS6424_CLIP_CTRL_REG: + case TAS6424_CLIP_WINDOW_REG: + case TAS6424_CLIP_WARN_REG: + case TAS6424_CBC_STAT_REG: + case TAS6424_MISC_CTRL4_REG: + return true; + default: + return false; + } +} + +static bool tas6424_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TAS6424_DC_LOAD_DIAG_REP12_REG: + case TAS6424_DC_LOAD_DIAG_REP34_REG: + case TAS6424_DC_LOAD_DIAG_REPLO_REG: + case TAS6424_CHANNEL_STATE_REG: + case TAS6424_CHANNEL_FAULT_REG: + case TAS6424_GLOB_FAULT1_REG: + case TAS6424_GLOB_FAULT2_REG: + case TAS6424_WARN_REG: + case TAS6424_AC_LOAD_DIAG_REP1_REG: + case TAS6424_AC_LOAD_DIAG_REP2_REG: + case TAS6424_AC_LOAD_DIAG_REP3_REG: + case TAS6424_AC_LOAD_DIAG_REP4_REG: + return true; + default: + return false; + } +} + +static const struct regmap_config tas6424_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = TAS6424_MAX_REG, + .cache_type = REGCACHE_RBTREE, + .writeable_reg = tas6424_is_writable_reg, + .volatile_reg = tas6424_is_volatile_reg, +}; + +/* + * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that + * setting the gain below -100 dB (register value <0x7) is effectively a MUTE + * as per device datasheet. + */ +static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0); + +static const struct snd_kcontrol_new tas6424_snd_controls[] = { + SOC_SINGLE_TLV("Speaker Driver CH1 Playback Volume", + TAS6424_CH1_VOL_CTRL_REG, 0, 0xff, 0, dac_tlv), + SOC_SINGLE_TLV("Speaker Driver CH2 Playback Volume", + TAS6424_CH2_VOL_CTRL_REG, 0, 0xff, 0, dac_tlv), + SOC_SINGLE_TLV("Speaker Driver CH3 Playback Volume", + TAS6424_CH3_VOL_CTRL_REG, 0, 0xff, 0, dac_tlv), + SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume", + TAS6424_CH4_VOL_CTRL_REG, 0, 0xff, 0, dac_tlv), +}; + +static const struct snd_soc_dapm_widget tas6424_dapm_widgets[] = { + SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas6424_dac_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), + SND_SOC_DAPM_OUTPUT("OUT") +}; + +static const struct snd_soc_dapm_route tas6424_audio_map[] = { + { "DAC", NULL, "DAC IN" }, + { "OUT", NULL, "DAC" }, +}; + +static struct snd_soc_codec_driver soc_codec_dev_tas6424 = { + .probe = tas6424_codec_probe, + .remove = tas6424_codec_remove, + .suspend = tas6424_suspend, + .resume = tas6424_resume, + .set_bias_level = tas6424_set_bias_level, + .idle_bias_off = true, + + .component_driver = { + .controls = tas6424_snd_controls, + .num_controls = ARRAY_SIZE(tas6424_snd_controls), + .dapm_widgets = tas6424_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(tas6424_dapm_widgets), + .dapm_routes = tas6424_audio_map, + .num_dapm_routes = ARRAY_SIZE(tas6424_audio_map), + }, +}; + +/* PCM rates supported by the TAS6424 driver */ +#define TAS6424_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\ + SNDRV_PCM_RATE_96000) + +/* Formats supported by TAS6424 driver */ +#define TAS6424_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\ + SNDRV_PCM_FMTBIT_S32_LE) + +static struct snd_soc_dai_ops tas6424_speaker_dai_ops = { + .hw_params = tas6424_hw_params, + .set_fmt = tas6424_set_dai_fmt, + .set_tdm_slot = tas6424_set_dai_tdm_slot, + .digital_mute = tas6424_mute, +}; + +/* TAS6424 DAI structure */ +static struct snd_soc_dai_driver tas6424_dai[] = { + { + .name = "tas6424-amplifier", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 4, + .rates = TAS6424_RATES, + .formats = TAS6424_FORMATS, + }, + .ops = &tas6424_speaker_dai_ops, + }, +}; + +static int tas6424_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct tas6424_data *data; + int ret; + int i; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->tas6424_client = client; + data->regmap = devm_regmap_init_i2c(client, &tas6424_regmap_config); + if (IS_ERR(data->regmap)) { + ret = PTR_ERR(data->regmap); + dev_err(dev, "failed to allocate register map: %d\n", ret); + return ret; + } + + for (i = 0; i < ARRAY_SIZE(data->supplies); i++) + data->supplies[i].supply = tas6424_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; + } + + dev_set_drvdata(dev, data); + + ret = snd_soc_register_codec(&client->dev, + &soc_codec_dev_tas6424, + tas6424_dai, ARRAY_SIZE(tas6424_dai)); + if (ret < 0) { + dev_err(dev, "failed to register codec: %d\n", ret); + return ret; + } + + return 0; +} + +static int tas6424_remove(struct i2c_client *client) +{ + struct device *dev = &client->dev; + + snd_soc_unregister_codec(dev); + + return 0; +} + +static const struct i2c_device_id tas6424_id[] = { + { "tas6424", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tas6424_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id tas6424_of_match[] = { + { .compatible = "ti,tas6424", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tas6424_of_match); +#endif + +static struct i2c_driver tas6424_i2c_driver = { + .driver = { + .name = "tas6424", + .of_match_table = of_match_ptr(tas6424_of_match), + }, + .probe = tas6424_probe, + .remove = tas6424_remove, + .id_table = tas6424_id, +}; +module_i2c_driver(tas6424_i2c_driver); + +MODULE_AUTHOR("Andreas Dannenberg dannenberg@ti.com"); +MODULE_DESCRIPTION("TAS6424 Audio amplifier driver"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/codecs/tas6424.h b/sound/soc/codecs/tas6424.h new file mode 100644 index 0000000..c4bf43a --- /dev/null +++ b/sound/soc/codecs/tas6424.h @@ -0,0 +1,127 @@ +/* + * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier + * + * Copyright (C)2016 Texas Instruments Incorporated - http://www.ti.com + * Author: Andreas Dannenberg dannenberg@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. + */ + +#ifndef __TAS6424_H__ +#define __TAS6424_H__ + +/* Register Address Map */ +#define TAS6424_MODE_CTRL_REG 0x00 +#define TAS6424_MISC_CTRL1_REG 0x01 +#define TAS6424_MISC_CTRL2_REG 0x02 +#define TAS6424_SAP_CTRL_REG 0x03 +#define TAS6424_CH_STATE_CTRL_REG 0x04 +#define TAS6424_CH1_VOL_CTRL_REG 0x05 +#define TAS6424_CH2_VOL_CTRL_REG 0x06 +#define TAS6424_CH3_VOL_CTRL_REG 0x07 +#define TAS6424_CH4_VOL_CTRL_REG 0x08 +#define TAS6424_DC_DIAG_CTRL1_REG 0x09 +#define TAS6424_DC_DIAG_CTRL2_REG 0x0A +#define TAS6424_DC_DIAG_CTRL3_REG 0x0B +#define TAS6424_DC_LOAD_DIAG_REP12_REG 0x0C +#define TAS6424_DC_LOAD_DIAG_REP34_REG 0x0D +#define TAS6424_DC_LOAD_DIAG_REPLO_REG 0x0E +#define TAS6424_CHANNEL_STATE_REG 0x0F +#define TAS6424_CHANNEL_FAULT_REG 0x10 +#define TAS6424_GLOB_FAULT1_REG 0x11 +#define TAS6424_GLOB_FAULT2_REG 0x12 +#define TAS6424_WARN_REG 0x13 +#define TAS6424_PIN_CTRL_REG 0x14 +#define TAS6424_AC_DIAG_CTRL_REG 0x15 +#define TAS6424_AC_LOAD_DIAG_REP1_REG 0x17 +#define TAS6424_AC_LOAD_DIAG_REP2_REG 0x18 +#define TAS6424_AC_LOAD_DIAG_REP3_REG 0x19 +#define TAS6424_AC_LOAD_DIAG_REP4_REG 0x1A +#define TAS6424_MISC_CTRL3_REG 0x21 +#define TAS6424_CLIP_CTRL_REG 0x22 +#define TAS6424_CLIP_WINDOW_REG 0x23 +#define TAS6424_CLIP_WARN_REG 0x24 +#define TAS6424_CBC_STAT_REG 0x25 +#define TAS6424_MISC_CTRL4_REG 0x26 +#define TAS6424_MAX_REG TAS6424_MISC_CTRL4_REG + +/* TAS6424_MODE_CTRL_REG */ +#define TAS6424_RESET BIT(7) + +/* TAS6424_SAP_CTRL_REG */ +#define TAS6424_SAP_RATE_44100 (0x0 << 6) +#define TAS6424_SAP_RATE_48000 (0x1 << 6) +#define TAS6424_SAP_RATE_96000 (0x2 << 6) +#define TAS6424_SAP_RATE_MASK GENMASK(7, 6) +#define TAS6424_SAP_TDM_SLOT_LAST BIT(5) +#define TAS6424_SAP_TDM_SLOT_SZ_16 BIT(4) +#define TAS6424_SAP_TDM_SLOT_SWAP BIT(3) +#define TAS6424_SAP_RIGHTJ_24 (0x0) +#define TAS6424_SAP_RIGHTJ_20 (0x1) +#define TAS6424_SAP_RIGHTJ_18 (0x2) +#define TAS6424_SAP_RIGHTJ_16 (0x3) +#define TAS6424_SAP_I2S (0x4) +#define TAS6424_SAP_LEFTJ (0x5) +#define TAS6424_SAP_DSP (0x6) +#define TAS6424_SAP_FMT_MASK GENMASK(2, 0) + +/* TAS6424_CH_STATE_CTRL_REG */ +#define TAS6424_CH1_STATE_PLAY (0x0 << 6) +#define TAS6424_CH1_STATE_HIZ (0x1 << 6) +#define TAS6424_CH1_STATE_MUTE (0x2 << 6) +#define TAS6424_CH1_STATE_DIAG (0x3 << 6) +#define TAS6424_CH1_STATE_MASK GENMASK(7, 6) +#define TAS6424_CH2_STATE_PLAY (0x0 << 4) +#define TAS6424_CH2_STATE_HIZ (0x1 << 4) +#define TAS6424_CH2_STATE_MUTE (0x2 << 4) +#define TAS6424_CH2_STATE_DIAG (0x3 << 4) +#define TAS6424_CH2_STATE_MASK GENMASK(5, 4) +#define TAS6424_CH3_STATE_PLAY (0x0 << 2) +#define TAS6424_CH3_STATE_HIZ (0x1 << 2) +#define TAS6424_CH3_STATE_MUTE (0x2 << 2) +#define TAS6424_CH3_STATE_DIAG (0x3 << 2) +#define TAS6424_CH3_STATE_MASK GENMASK(3, 2) +#define TAS6424_CH4_STATE_PLAY (0x0) +#define TAS6424_CH4_STATE_HIZ (0x1) +#define TAS6424_CH4_STATE_MUTE (0x2) +#define TAS6424_CH4_STATE_DIAG (0x3) +#define TAS6424_CH4_STATE_MASK GENMASK(1, 0) + +/* TAS6424_GLOB_FAULT1_REG */ +#define TAS6424_FAULT_CLOCK BIT(4) +#define TAS6424_FAULT_PVDD_OV BIT(3) +#define TAS6424_FAULT_VBAT_OV BIT(2) +#define TAS6424_FAULT_PVDD_UV BIT(1) +#define TAS6424_FAULT_VBAT_UV BIT(0) + +/* TAS6424_GLOB_FAULT2_REG */ +#define TAS6424_FAULT_OTSD BIT(4) +#define TAS6424_FAULT_OTSD_CH1 BIT(3) +#define TAS6424_FAULT_OTSD_CH2 BIT(2) +#define TAS6424_FAULT_OTSD_CH3 BIT(1) +#define TAS6424_FAULT_OTSD_CH4 BIT(0) + +/* TAS6424_WARN_REG */ +#define TAS6424_WARN_VDD_UV BIT(6) +#define TAS6424_WARN_VDD_POR BIT(5) +#define TAS6424_WARN_VDD_OTW BIT(4) +#define TAS6424_WARN_VDD_OTW_CH1 BIT(3) +#define TAS6424_WARN_VDD_OTW_CH2 BIT(2) +#define TAS6424_WARN_VDD_OTW_CH3 BIT(1) +#define TAS6424_WARN_VDD_OTW_CH4 BIT(0) + +/* TAS6424_MISC_CTRL3_REG */ +#define TAS6424_CLEAR_FAULT BIT(7) +#define TAS6424_PBTL_CH_SEL BIT(6) +#define TAS6424_MASK_CBC_WARN BIT(5) +#define TAS6424_MASK_VDD_UV BIT(4) +#define TAS6424_OTSD_AUTO_RECOVERY BIT(3) + +#endif /* __TAS6424_H__ */