forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
815 lines
24 KiB
815 lines
24 KiB
// 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 <[email protected]> |
|
* Andrew F. Davis <[email protected]> |
|
*/ |
|
|
|
#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_CLOCK_PROVIDER_MASK) { |
|
case SND_SOC_DAIFMT_CBC_CFC: |
|
break; |
|
default: |
|
dev_err(component->dev, "Invalid DAI clocking\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, ®_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, |
|
}; |
|
|
|
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, ®); |
|
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, ®); |
|
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, ®); |
|
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, ®); |
|
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) |
|
{ |
|
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); |
|
goto disable_regs; |
|
} |
|
|
|
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); |
|
goto disable_regs; |
|
} |
|
|
|
return 0; |
|
|
|
disable_regs: |
|
regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies); |
|
return ret; |
|
} |
|
|
|
static void 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); |
|
} |
|
|
|
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_new = tas6424_i2c_probe, |
|
.remove = tas6424_i2c_remove, |
|
.id_table = tas6424_i2c_ids, |
|
}; |
|
module_i2c_driver(tas6424_i2c_driver); |
|
|
|
MODULE_AUTHOR("Andreas Dannenberg <[email protected]>"); |
|
MODULE_AUTHOR("Andrew F. Davis <[email protected]>"); |
|
MODULE_DESCRIPTION("TAS6424 Audio amplifier driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|