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Diffstat (limited to 'sound/soc/codecs/tas6424.c')
-rw-r--r--sound/soc/codecs/tas6424.c817
1 files changed, 817 insertions, 0 deletions
diff --git a/sound/soc/codecs/tas6424.c b/sound/soc/codecs/tas6424.c
new file mode 100644
index 000000000..59543d392
--- /dev/null
+++ b/sound/soc/codecs/tas6424.c
@@ -0,0 +1,817 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier
+ *
+ * Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
+ * Author: Andreas Dannenberg <dannenberg@ti.com>
+ * Andrew F. Davis <afd@ti.com>
+ */
+
+#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 <linux/gpio/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 "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 device *dev;
+ struct regmap *regmap;
+ struct regulator_bulk_data supplies[TAS6424_NUM_SUPPLIES];
+ struct delayed_work fault_check_work;
+ unsigned int last_cfault;
+ unsigned int last_fault1;
+ unsigned int last_fault2;
+ unsigned int last_warn;
+ struct gpio_desc *standby_gpio;
+ struct gpio_desc *mute_gpio;
+};
+
+/*
+ * 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, 0, 0xff, 0, dac_tlv),
+ SOC_SINGLE_TLV("Speaker Driver CH2 Playback Volume",
+ TAS6424_CH2_VOL_CTRL, 0, 0xff, 0, dac_tlv),
+ SOC_SINGLE_TLV("Speaker Driver CH3 Playback Volume",
+ TAS6424_CH3_VOL_CTRL, 0, 0xff, 0, dac_tlv),
+ SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume",
+ TAS6424_CH4_VOL_CTRL, 0, 0xff, 0, dac_tlv),
+ SOC_SINGLE_STROBE("Auto Diagnostics Switch", TAS6424_DC_DIAG_CTRL1,
+ TAS6424_LDGBYPASS_SHIFT, 1),
+};
+
+static int tas6424_dac_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);
+ struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);
+
+ dev_dbg(component->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;
+}
+
+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 int tas6424_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ unsigned int rate = params_rate(params);
+ unsigned int width = params_width(params);
+ u8 sap_ctrl = 0;
+
+ dev_dbg(component->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(component->dev, "unsupported sample rate: %u\n", rate);
+ return -EINVAL;
+ }
+
+ switch (width) {
+ case 16:
+ sap_ctrl |= TAS6424_SAP_TDM_SLOT_SZ_16;
+ break;
+ case 24:
+ break;
+ default:
+ dev_err(component->dev, "unsupported sample width: %u\n", width);
+ return -EINVAL;
+ }
+
+ snd_soc_component_update_bits(component, TAS6424_SAP_CTRL,
+ TAS6424_SAP_RATE_MASK |
+ TAS6424_SAP_TDM_SLOT_SZ_16,
+ sap_ctrl);
+
+ return 0;
+}
+
+static int tas6424_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ u8 serial_format = 0;
+
+ dev_dbg(component->dev, "%s() fmt=0x%0x\n", __func__, fmt);
+
+ /* clock masters */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ dev_err(component->dev, "Invalid DAI master/slave interface\n");
+ return -EINVAL;
+ }
+
+ /* signal polarity */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ dev_err(component->dev, "Invalid DAI clock signal polarity\n");
+ return -EINVAL;
+ }
+
+ /* interface format */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ serial_format |= TAS6424_SAP_I2S;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ serial_format |= TAS6424_SAP_DSP;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ /*
+ * 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:
+ serial_format |= TAS6424_SAP_LEFTJ;
+ break;
+ default:
+ dev_err(component->dev, "Invalid DAI interface format\n");
+ return -EINVAL;
+ }
+
+ snd_soc_component_update_bits(component, TAS6424_SAP_CTRL,
+ TAS6424_SAP_FMT_MASK, serial_format);
+
+ 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_component *component = dai->component;
+ unsigned int first_slot, last_slot;
+ bool sap_tdm_slot_last;
+
+ dev_dbg(component->dev, "%s() tx_mask=%d rx_mask=%d\n", __func__,
+ tx_mask, rx_mask);
+
+ if (!tx_mask || !rx_mask)
+ return 0; /* nothing needed to disable TDM mode */
+
+ /*
+ * 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(component->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(component->dev, "tdm mask must start at slot 0 or 4\n");
+ return -EINVAL;
+ }
+
+ snd_soc_component_update_bits(component, TAS6424_SAP_CTRL, TAS6424_SAP_TDM_SLOT_LAST,
+ sap_tdm_slot_last ? TAS6424_SAP_TDM_SLOT_LAST : 0);
+
+ return 0;
+}
+
+static int tas6424_mute(struct snd_soc_dai *dai, int mute, int direction)
+{
+ struct snd_soc_component *component = dai->component;
+ struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);
+ unsigned int val;
+
+ dev_dbg(component->dev, "%s() mute=%d\n", __func__, mute);
+
+ if (tas6424->mute_gpio) {
+ gpiod_set_value_cansleep(tas6424->mute_gpio, mute);
+ return 0;
+ }
+
+ if (mute)
+ val = TAS6424_ALL_STATE_MUTE;
+ else
+ val = TAS6424_ALL_STATE_PLAY;
+
+ snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, val);
+
+ return 0;
+}
+
+static int tas6424_power_off(struct snd_soc_component *component)
+{
+ struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);
+ int ret;
+
+ snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, TAS6424_ALL_STATE_HIZ);
+
+ 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(component->dev, "failed to disable supplies: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tas6424_power_on(struct snd_soc_component *component)
+{
+ struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);
+ int ret;
+ u8 chan_states;
+ int no_auto_diags = 0;
+ unsigned int reg_val;
+
+ if (!regmap_read(tas6424->regmap, TAS6424_DC_DIAG_CTRL1, &reg_val))
+ no_auto_diags = reg_val & TAS6424_LDGBYPASS_MASK;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies),
+ tas6424->supplies);
+ if (ret < 0) {
+ dev_err(component->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(component->dev, "failed to sync regcache: %d\n", ret);
+ return ret;
+ }
+
+ if (tas6424->mute_gpio) {
+ gpiod_set_value_cansleep(tas6424->mute_gpio, 0);
+ /*
+ * channels are muted via the mute pin. Don't also mute
+ * them via the registers so that subsequent register
+ * access is not necessary to un-mute the channels
+ */
+ chan_states = TAS6424_ALL_STATE_PLAY;
+ } else {
+ chan_states = TAS6424_ALL_STATE_MUTE;
+ }
+ snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, chan_states);
+
+ /* any time we come out of HIZ, the output channels automatically run DC
+ * load diagnostics if autodiagnotics are enabled. wait here until this
+ * completes.
+ */
+ if (!no_auto_diags)
+ msleep(230);
+
+ return 0;
+}
+
+static int tas6424_set_bias_level(struct snd_soc_component *component,
+ enum snd_soc_bias_level level)
+{
+ dev_dbg(component->dev, "%s() level=%d\n", __func__, level);
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
+ tas6424_power_on(component);
+ break;
+ case SND_SOC_BIAS_OFF:
+ tas6424_power_off(component);
+ break;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_component_driver soc_codec_dev_tas6424 = {
+ .set_bias_level = tas6424_set_bias_level,
+ .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),
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static const 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,
+ .mute_stream = tas6424_mute,
+ .no_capture_mute = 1,
+};
+
+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 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->dev;
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(tas6424->regmap, TAS6424_CHANNEL_FAULT, &reg);
+ if (ret < 0) {
+ dev_err(dev, "failed to read CHANNEL_FAULT register: %d\n", ret);
+ goto out;
+ }
+
+ if (!reg) {
+ tas6424->last_cfault = reg;
+ goto check_global_fault1_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_OC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH1))
+ dev_crit(dev, "experienced a channel 1 overcurrent fault\n");
+
+ if ((reg & TAS6424_FAULT_OC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH2))
+ dev_crit(dev, "experienced a channel 2 overcurrent fault\n");
+
+ if ((reg & TAS6424_FAULT_OC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH3))
+ dev_crit(dev, "experienced a channel 3 overcurrent fault\n");
+
+ if ((reg & TAS6424_FAULT_OC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH4))
+ dev_crit(dev, "experienced a channel 4 overcurrent fault\n");
+
+ if ((reg & TAS6424_FAULT_DC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH1))
+ dev_crit(dev, "experienced a channel 1 DC fault\n");
+
+ if ((reg & TAS6424_FAULT_DC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH2))
+ dev_crit(dev, "experienced a channel 2 DC fault\n");
+
+ if ((reg & TAS6424_FAULT_DC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH3))
+ dev_crit(dev, "experienced a channel 3 DC fault\n");
+
+ if ((reg & TAS6424_FAULT_DC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH4))
+ dev_crit(dev, "experienced a channel 4 DC fault\n");
+
+ /* Store current fault1 value so we can detect any changes next time */
+ tas6424->last_cfault = reg;
+
+check_global_fault1_reg:
+ ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT1, &reg);
+ if (ret < 0) {
+ dev_err(dev, "failed to read GLOB_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) {
+ tas6424->last_fault1 = reg;
+ goto check_global_fault2_reg;
+ }
+
+ 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);
+ if (ret < 0) {
+ dev_err(dev, "failed to read GLOB_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) {
+ tas6424->last_fault2 = 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);
+ 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) {
+ tas6424->last_warn = 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 warnings by toggling the CLEAR_FAULT control bit */
+ ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3,
+ 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,
+ 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 const struct reg_default tas6424_reg_defaults[] = {
+ { TAS6424_MODE_CTRL, 0x00 },
+ { TAS6424_MISC_CTRL1, 0x32 },
+ { TAS6424_MISC_CTRL2, 0x62 },
+ { TAS6424_SAP_CTRL, 0x04 },
+ { TAS6424_CH_STATE_CTRL, 0x55 },
+ { TAS6424_CH1_VOL_CTRL, 0xcf },
+ { TAS6424_CH2_VOL_CTRL, 0xcf },
+ { TAS6424_CH3_VOL_CTRL, 0xcf },
+ { TAS6424_CH4_VOL_CTRL, 0xcf },
+ { TAS6424_DC_DIAG_CTRL1, 0x00 },
+ { TAS6424_DC_DIAG_CTRL2, 0x11 },
+ { TAS6424_DC_DIAG_CTRL3, 0x11 },
+ { TAS6424_PIN_CTRL, 0xff },
+ { TAS6424_AC_DIAG_CTRL1, 0x00 },
+ { TAS6424_MISC_CTRL3, 0x00 },
+ { TAS6424_CLIP_CTRL, 0x01 },
+ { TAS6424_CLIP_WINDOW, 0x14 },
+ { TAS6424_CLIP_WARN, 0x00 },
+ { TAS6424_CBC_STAT, 0x00 },
+ { TAS6424_MISC_CTRL4, 0x40 },
+};
+
+static bool tas6424_is_writable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TAS6424_MODE_CTRL:
+ case TAS6424_MISC_CTRL1:
+ case TAS6424_MISC_CTRL2:
+ case TAS6424_SAP_CTRL:
+ case TAS6424_CH_STATE_CTRL:
+ case TAS6424_CH1_VOL_CTRL:
+ case TAS6424_CH2_VOL_CTRL:
+ case TAS6424_CH3_VOL_CTRL:
+ case TAS6424_CH4_VOL_CTRL:
+ case TAS6424_DC_DIAG_CTRL1:
+ case TAS6424_DC_DIAG_CTRL2:
+ case TAS6424_DC_DIAG_CTRL3:
+ case TAS6424_PIN_CTRL:
+ case TAS6424_AC_DIAG_CTRL1:
+ case TAS6424_MISC_CTRL3:
+ case TAS6424_CLIP_CTRL:
+ case TAS6424_CLIP_WINDOW:
+ case TAS6424_CLIP_WARN:
+ case TAS6424_CBC_STAT:
+ case TAS6424_MISC_CTRL4:
+ 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:
+ case TAS6424_DC_LOAD_DIAG_REP34:
+ case TAS6424_DC_LOAD_DIAG_REPLO:
+ case TAS6424_CHANNEL_STATE:
+ case TAS6424_CHANNEL_FAULT:
+ case TAS6424_GLOB_FAULT1:
+ case TAS6424_GLOB_FAULT2:
+ case TAS6424_WARN:
+ case TAS6424_AC_LOAD_DIAG_REP1:
+ case TAS6424_AC_LOAD_DIAG_REP2:
+ case TAS6424_AC_LOAD_DIAG_REP3:
+ case TAS6424_AC_LOAD_DIAG_REP4:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config tas6424_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .writeable_reg = tas6424_is_writable_reg,
+ .volatile_reg = tas6424_is_volatile_reg,
+
+ .max_register = TAS6424_MAX,
+ .reg_defaults = tas6424_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(tas6424_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id tas6424_of_ids[] = {
+ { .compatible = "ti,tas6424", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tas6424_of_ids);
+#endif
+
+static int tas6424_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct tas6424_data *tas6424;
+ int ret;
+ int i;
+
+ tas6424 = devm_kzalloc(dev, sizeof(*tas6424), GFP_KERNEL);
+ if (!tas6424)
+ return -ENOMEM;
+ dev_set_drvdata(dev, tas6424);
+
+ tas6424->dev = dev;
+
+ tas6424->regmap = devm_regmap_init_i2c(client, &tas6424_regmap_config);
+ if (IS_ERR(tas6424->regmap)) {
+ ret = PTR_ERR(tas6424->regmap);
+ dev_err(dev, "unable to allocate register map: %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Get control of the standby pin and set it LOW to take the codec
+ * out of the stand-by mode.
+ * Note: The actual pin polarity is taken care of in the GPIO lib
+ * according the polarity specified in the DTS.
+ */
+ tas6424->standby_gpio = devm_gpiod_get_optional(dev, "standby",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(tas6424->standby_gpio)) {
+ if (PTR_ERR(tas6424->standby_gpio) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "failed to get standby GPIO: %ld\n",
+ PTR_ERR(tas6424->standby_gpio));
+ tas6424->standby_gpio = NULL;
+ }
+
+ /*
+ * Get control of the mute pin and set it HIGH in order to start with
+ * all the output muted.
+ * Note: The actual pin polarity is taken care of in the GPIO lib
+ * according the polarity specified in the DTS.
+ */
+ tas6424->mute_gpio = devm_gpiod_get_optional(dev, "mute",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(tas6424->mute_gpio)) {
+ if (PTR_ERR(tas6424->mute_gpio) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "failed to get nmute GPIO: %ld\n",
+ PTR_ERR(tas6424->mute_gpio));
+ tas6424->mute_gpio = NULL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(tas6424->supplies); i++)
+ tas6424->supplies[i].supply = tas6424_supply_names[i];
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(tas6424->supplies),
+ tas6424->supplies);
+ if (ret) {
+ dev_err(dev, "unable to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies),
+ tas6424->supplies);
+ if (ret) {
+ dev_err(dev, "unable to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ /* Reset device to establish well-defined startup state */
+ ret = regmap_update_bits(tas6424->regmap, TAS6424_MODE_CTRL,
+ TAS6424_RESET, TAS6424_RESET);
+ if (ret) {
+ dev_err(dev, "unable to reset device: %d\n", ret);
+ return ret;
+ }
+
+ INIT_DELAYED_WORK(&tas6424->fault_check_work, tas6424_fault_check_work);
+
+ ret = devm_snd_soc_register_component(dev, &soc_codec_dev_tas6424,
+ tas6424_dai, ARRAY_SIZE(tas6424_dai));
+ if (ret < 0) {
+ dev_err(dev, "unable to register codec: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tas6424_i2c_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct tas6424_data *tas6424 = dev_get_drvdata(dev);
+ int ret;
+
+ cancel_delayed_work_sync(&tas6424->fault_check_work);
+
+ /* put the codec in stand-by */
+ if (tas6424->standby_gpio)
+ gpiod_set_value_cansleep(tas6424->standby_gpio, 1);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies),
+ tas6424->supplies);
+ if (ret < 0) {
+ dev_err(dev, "unable to disable supplies: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id tas6424_i2c_ids[] = {
+ { "tas6424", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tas6424_i2c_ids);
+
+static struct i2c_driver tas6424_i2c_driver = {
+ .driver = {
+ .name = "tas6424",
+ .of_match_table = of_match_ptr(tas6424_of_ids),
+ },
+ .probe = tas6424_i2c_probe,
+ .remove = tas6424_i2c_remove,
+ .id_table = tas6424_i2c_ids,
+};
+module_i2c_driver(tas6424_i2c_driver);
+
+MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
+MODULE_DESCRIPTION("TAS6424 Audio amplifier driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 09:15:41 +0000