The Texas Instruments TAS5805M is a class D audio amplifier with an integrated DSP. DSP configuration is expected to be supplied via a device-tree attribute containing a sequence of register writes.
These register writes set up application-specific DSP settings and are expected to be generated using TI's PPC3 tool.
Signed-off-by: Daniel Beer daniel.beer@igorinstitute.com --- sound/soc/codecs/Kconfig | 9 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/tas5805m.c | 554 ++++++++++++++++++++++++++++++++++++ 3 files changed, 565 insertions(+) create mode 100644 sound/soc/codecs/tas5805m.c
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index d3e5ae8310ef..d6b8f5cb6ef8 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -1485,6 +1485,15 @@ config SND_SOC_TAS5720 Enable support for Texas Instruments TAS5720L/M high-efficiency mono Class-D audio power amplifiers.
+config SND_SOC_TAS5805M + tristate "Texas Instruments TAS5805M speaker amplifier" + depends on I2C + help + Enable support for Texas Instruments TAS5805M Class-D + amplifiers. This is a speaker amplifier with an integrated + DSP. DSP configuration for each instance needs to be supplied + via a device-tree attribute. + config SND_SOC_TAS6424 tristate "Texas Instruments TAS6424 Quad-Channel Audio amplifier" depends on I2C diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index ac7f20972470..b4e11c3e4a08 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -236,6 +236,7 @@ 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-tas5805m-objs := tas5805m.o snd-soc-tas6424-objs := tas6424.o snd-soc-tda7419-objs := tda7419.o snd-soc-tas2770-objs := tas2770.o @@ -574,6 +575,7 @@ obj-$(CONFIG_SND_SOC_TAS2764) += snd-soc-tas2764.o obj-$(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-$(CONFIG_SND_SOC_TAS5805M) += snd-soc-tas5805m.o obj-$(CONFIG_SND_SOC_TAS6424) += snd-soc-tas6424.o obj-$(CONFIG_SND_SOC_TDA7419) += snd-soc-tda7419.o obj-$(CONFIG_SND_SOC_TAS2770) += snd-soc-tas2770.o diff --git a/sound/soc/codecs/tas5805m.c b/sound/soc/codecs/tas5805m.c new file mode 100644 index 000000000000..300d28bb053d --- /dev/null +++ b/sound/soc/codecs/tas5805m.c @@ -0,0 +1,554 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Driver for the TAS5805M Audio Amplifier +// +// Author: Andy Liu andy-liu@ti.com +// Author: Daniel Beer daniel.beer@igorinstitute.com +// +// This is based on a driver originally written by Andy Liu at TI and +// posted here: +// +// https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5... +// +// It has been simplified a little and reworked for the 5.x ALSA SoC API. + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> +#include <linux/atomic.h> +#include <linux/workqueue.h> + +#include <sound/soc.h> +#include <sound/pcm.h> +#include <sound/initval.h> + +/* Datasheet-defined registers on page 0, book 0 */ +#define REG_PAGE 0x00 +#define REG_DEVICE_CTRL_1 0x02 +#define REG_DEVICE_CTRL_2 0x03 +#define REG_SIG_CH_CTRL 0x28 +#define REG_SAP_CTRL_1 0x33 +#define REG_FS_MON 0x37 +#define REG_BCK_MON 0x38 +#define REG_CLKDET_STATUS 0x39 +#define REG_VOL_CTL 0x4c +#define REG_AGAIN 0x54 +#define REG_ADR_PIN_CTRL 0x60 +#define REG_ADR_PIN_CONFIG 0x61 +#define REG_CHAN_FAULT 0x70 +#define REG_GLOBAL_FAULT1 0x71 +#define REG_GLOBAL_FAULT2 0x72 +#define REG_FAULT 0x78 +#define REG_BOOK 0x7f + +/* DEVICE_CTRL_2 register values */ +#define DCTRL2_MODE_DEEP_SLEEP 0x00 +#define DCTRL2_MODE_SLEEP 0x01 +#define DCTRL2_MODE_HIZ 0x02 +#define DCTRL2_MODE_PLAY 0x03 + +#define DCTRL2_MUTE 0x08 +#define DCTRL2_DIS_DSP 0x10 + +/* This sequence of register writes must always be sent, prior to the + * 5ms delay while we wait for the DSP to boot. + */ +static const uint8_t dsp_cfg_preboot[] = { + 0x00, 0x00, 0x7f, 0x00, 0x03, 0x02, 0x01, 0x11, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x7f, 0x00, 0x03, 0x02, +}; + +static const uint32_t tas5805m_volume[] = { + 0x0000001B, /* 0, -110dB */ 0x0000001E, /* 1, -109dB */ + 0x00000021, /* 2, -108dB */ 0x00000025, /* 3, -107dB */ + 0x0000002A, /* 4, -106dB */ 0x0000002F, /* 5, -105dB */ + 0x00000035, /* 6, -104dB */ 0x0000003B, /* 7, -103dB */ + 0x00000043, /* 8, -102dB */ 0x0000004B, /* 9, -101dB */ + 0x00000054, /* 10, -100dB */ 0x0000005E, /* 11, -99dB */ + 0x0000006A, /* 12, -98dB */ 0x00000076, /* 13, -97dB */ + 0x00000085, /* 14, -96dB */ 0x00000095, /* 15, -95dB */ + 0x000000A7, /* 16, -94dB */ 0x000000BC, /* 17, -93dB */ + 0x000000D3, /* 18, -92dB */ 0x000000EC, /* 19, -91dB */ + 0x00000109, /* 20, -90dB */ 0x0000012A, /* 21, -89dB */ + 0x0000014E, /* 22, -88dB */ 0x00000177, /* 23, -87dB */ + 0x000001A4, /* 24, -86dB */ 0x000001D8, /* 25, -85dB */ + 0x00000211, /* 26, -84dB */ 0x00000252, /* 27, -83dB */ + 0x0000029A, /* 28, -82dB */ 0x000002EC, /* 29, -81dB */ + 0x00000347, /* 30, -80dB */ 0x000003AD, /* 31, -79dB */ + 0x00000420, /* 32, -78dB */ 0x000004A1, /* 33, -77dB */ + 0x00000532, /* 34, -76dB */ 0x000005D4, /* 35, -75dB */ + 0x0000068A, /* 36, -74dB */ 0x00000756, /* 37, -73dB */ + 0x0000083B, /* 38, -72dB */ 0x0000093C, /* 39, -71dB */ + 0x00000A5D, /* 40, -70dB */ 0x00000BA0, /* 41, -69dB */ + 0x00000D0C, /* 42, -68dB */ 0x00000EA3, /* 43, -67dB */ + 0x0000106C, /* 44, -66dB */ 0x0000126D, /* 45, -65dB */ + 0x000014AD, /* 46, -64dB */ 0x00001733, /* 47, -63dB */ + 0x00001A07, /* 48, -62dB */ 0x00001D34, /* 49, -61dB */ + 0x000020C5, /* 50, -60dB */ 0x000024C4, /* 51, -59dB */ + 0x00002941, /* 52, -58dB */ 0x00002E49, /* 53, -57dB */ + 0x000033EF, /* 54, -56dB */ 0x00003A45, /* 55, -55dB */ + 0x00004161, /* 56, -54dB */ 0x0000495C, /* 57, -53dB */ + 0x0000524F, /* 58, -52dB */ 0x00005C5A, /* 59, -51dB */ + 0x0000679F, /* 60, -50dB */ 0x00007444, /* 61, -49dB */ + 0x00008274, /* 62, -48dB */ 0x0000925F, /* 63, -47dB */ + 0x0000A43B, /* 64, -46dB */ 0x0000B845, /* 65, -45dB */ + 0x0000CEC1, /* 66, -44dB */ 0x0000E7FB, /* 67, -43dB */ + 0x00010449, /* 68, -42dB */ 0x0001240C, /* 69, -41dB */ + 0x000147AE, /* 70, -40dB */ 0x00016FAA, /* 71, -39dB */ + 0x00019C86, /* 72, -38dB */ 0x0001CEDC, /* 73, -37dB */ + 0x00020756, /* 74, -36dB */ 0x000246B5, /* 75, -35dB */ + 0x00028DCF, /* 76, -34dB */ 0x0002DD96, /* 77, -33dB */ + 0x00033718, /* 78, -32dB */ 0x00039B87, /* 79, -31dB */ + 0x00040C37, /* 80, -30dB */ 0x00048AA7, /* 81, -29dB */ + 0x00051884, /* 82, -28dB */ 0x0005B7B1, /* 83, -27dB */ + 0x00066A4A, /* 84, -26dB */ 0x000732AE, /* 85, -25dB */ + 0x00081385, /* 86, -24dB */ 0x00090FCC, /* 87, -23dB */ + 0x000A2ADB, /* 88, -22dB */ 0x000B6873, /* 89, -21dB */ + 0x000CCCCD, /* 90, -20dB */ 0x000E5CA1, /* 91, -19dB */ + 0x00101D3F, /* 92, -18dB */ 0x0012149A, /* 93, -17dB */ + 0x00144961, /* 94, -16dB */ 0x0016C311, /* 95, -15dB */ + 0x00198A13, /* 96, -14dB */ 0x001CA7D7, /* 97, -13dB */ + 0x002026F3, /* 98, -12dB */ 0x00241347, /* 99, -11dB */ + 0x00287A27, /* 100, -10dB */ 0x002D6A86, /* 101, -9dB */ + 0x0032F52D, /* 102, -8dB */ 0x00392CEE, /* 103, -7dB */ + 0x004026E7, /* 104, -6dB */ 0x0047FACD, /* 105, -5dB */ + 0x0050C336, /* 106, -4dB */ 0x005A9DF8, /* 107, -3dB */ + 0x0065AC8C, /* 108, -2dB */ 0x00721483, /* 109, -1dB */ + 0x00800000, /* 110, 0dB */ 0x008F9E4D, /* 111, 1dB */ + 0x00A12478, /* 112, 2dB */ 0x00B4CE08, /* 113, 3dB */ + 0x00CADDC8, /* 114, 4dB */ 0x00E39EA9, /* 115, 5dB */ + 0x00FF64C1, /* 116, 6dB */ 0x011E8E6A, /* 117, 7dB */ + 0x0141857F, /* 118, 8dB */ 0x0168C0C6, /* 119, 9dB */ + 0x0194C584, /* 120, 10dB */ 0x01C62940, /* 121, 11dB */ + 0x01FD93C2, /* 122, 12dB */ 0x023BC148, /* 123, 13dB */ + 0x02818508, /* 124, 14dB */ 0x02CFCC01, /* 125, 15dB */ + 0x0327A01A, /* 126, 16dB */ 0x038A2BAD, /* 127, 17dB */ + 0x03F8BD7A, /* 128, 18dB */ 0x0474CD1B, /* 129, 19dB */ + 0x05000000, /* 130, 20dB */ 0x059C2F02, /* 131, 21dB */ + 0x064B6CAE, /* 132, 22dB */ 0x07100C4D, /* 133, 23dB */ + 0x07ECA9CD, /* 134, 24dB */ 0x08E43299, /* 135, 25dB */ + 0x09F9EF8E, /* 136, 26dB */ 0x0B319025, /* 137, 27dB */ + 0x0C8F36F2, /* 138, 28dB */ 0x0E1787B8, /* 139, 29dB */ + 0x0FCFB725, /* 140, 30dB */ 0x11BD9C84, /* 141, 31dB */ + 0x13E7C594, /* 142, 32dB */ 0x16558CCB, /* 143, 33dB */ + 0x190F3254, /* 144, 34dB */ 0x1C1DF80E, /* 145, 35dB */ + 0x1F8C4107, /* 146, 36dB */ 0x2365B4BF, /* 147, 37dB */ + 0x27B766C2, /* 148, 38dB */ 0x2C900313, /* 149, 39dB */ + 0x32000000, /* 150, 40dB */ 0x3819D612, /* 151, 41dB */ + 0x3EF23ECA, /* 152, 42dB */ 0x46A07B07, /* 153, 43dB */ + 0x4F3EA203, /* 154, 44dB */ 0x58E9F9F9, /* 155, 45dB */ + 0x63C35B8E, /* 156, 46dB */ 0x6FEFA16D, /* 157, 47dB */ + 0x7D982575, /* 158, 48dB */ +}; + +#define TAS5805M_VOLUME_MAX ((int)ARRAY_SIZE(tas5805m_volume) - 1) +#define TAS5805M_VOLUME_MIN 0 + +struct tas5805m_priv { + struct regulator *pvdd; + struct gpio_desc *gpio_pdn_n; + + uint8_t *dsp_cfg_data; + int dsp_cfg_len; + + struct regmap *regmap; + struct mutex lock; + + int vol[2]; + bool is_powered; + bool is_muted; +}; + +static void set_dsp_scale(struct regmap *rm, int offset, int vol) +{ + uint8_t v[4]; + uint32_t x = tas5805m_volume[vol]; + int i; + + for (i = 0; i < 4; i++) { + v[3 - i] = x; + x >>= 8; + } + + regmap_bulk_write(rm, offset, v, ARRAY_SIZE(v)); +} + +static void tas5805m_refresh_unlocked(struct snd_soc_component *component) +{ + struct tas5805m_priv *tas5805m = + snd_soc_component_get_drvdata(component); + struct regmap *rm = tas5805m->regmap; + + dev_dbg(component->dev, "refresh: is_muted=%d, vol=%d/%d\n", + tas5805m->is_muted, tas5805m->vol[0], tas5805m->vol[1]); + + regmap_write(rm, REG_PAGE, 0x00); + regmap_write(rm, REG_BOOK, 0x8c); + regmap_write(rm, REG_PAGE, 0x2a); + + /* Refresh volume. The actual volume control documented in the + * datasheet doesn't seem to work correctly. This is a pair of + * DSP registers which are *not* documented in the datasheet. + */ + set_dsp_scale(rm, 0x24, tas5805m->vol[0]); + set_dsp_scale(rm, 0x28, tas5805m->vol[1]); + + /* Set/clear digital soft-mute */ + regmap_write(rm, REG_DEVICE_CTRL_2, + (tas5805m->is_muted ? DCTRL2_MUTE : 0) | + DCTRL2_MODE_PLAY); +} + +static int tas5805m_vol_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + + uinfo->value.integer.min = TAS5805M_VOLUME_MIN; + uinfo->value.integer.max = TAS5805M_VOLUME_MAX; + return 0; +} + +static int tas5805m_vol_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = + snd_soc_kcontrol_component(kcontrol); + struct tas5805m_priv *tas5805m = + snd_soc_component_get_drvdata(component); + + mutex_lock(&tas5805m->lock); + ucontrol->value.integer.value[0] = tas5805m->vol[0]; + ucontrol->value.integer.value[1] = tas5805m->vol[1]; + mutex_unlock(&tas5805m->lock); + + return 0; +} + +static inline int volume_is_valid(int v) +{ + return (v >= TAS5805M_VOLUME_MIN) && (v <= TAS5805M_VOLUME_MAX); +} + +static int tas5805m_vol_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = + snd_soc_kcontrol_component(kcontrol); + struct tas5805m_priv *tas5805m = + snd_soc_component_get_drvdata(component); + + if (!(volume_is_valid(ucontrol->value.integer.value[0]) && + volume_is_valid(ucontrol->value.integer.value[1]))) + return -EINVAL; + + mutex_lock(&tas5805m->lock); + tas5805m->vol[0] = ucontrol->value.integer.value[0]; + tas5805m->vol[1] = ucontrol->value.integer.value[1]; + dev_dbg(component->dev, "set vol=%d/%d (is_powered=%d)\n", + tas5805m->vol[0], tas5805m->vol[1], tas5805m->is_powered); + if (tas5805m->is_powered) + tas5805m_refresh_unlocked(component); + mutex_unlock(&tas5805m->lock); + + return 0; +} + +static const struct snd_kcontrol_new tas5805m_snd_controls[] = { + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Master Playback Volume", + .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | + SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = tas5805m_vol_info, + .get = tas5805m_vol_get, + .put = tas5805m_vol_put, + }, +}; + +static void send_cfg(struct regmap *rm, + const uint8_t *s, unsigned int len) +{ + unsigned int i; + + for (i = 0; i + 1 < len; i += 2) + regmap_write(rm, s[i], s[i + 1]); +} + +/* The TAS5805M DSP can't be configured until the I2S clock has been + * present and stable for 5ms, or else it won't boot and we get no + * sound. + */ +static int tas5805m_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct tas5805m_priv *tas5805m = + snd_soc_component_get_drvdata(component); + struct regmap *rm = tas5805m->regmap; + unsigned int chan, global1, global2; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dev_dbg(component->dev, "DSP startup\n"); + + /* We mustn't issue any I2C transactions until the I2S + * clock is stable. Furthermore, we must allow a 5ms + * delay after the first set of register writes to + * allow the DSP to boot before configuring it. + */ + mutex_lock(&tas5805m->lock); + usleep_range(5000, 10000); + send_cfg(rm, dsp_cfg_preboot, + ARRAY_SIZE(dsp_cfg_preboot)); + usleep_range(5000, 15000); + send_cfg(rm, tas5805m->dsp_cfg_data, + tas5805m->dsp_cfg_len); + + tas5805m->is_powered = true; + tas5805m_refresh_unlocked(component); + mutex_unlock(&tas5805m->lock); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dev_dbg(component->dev, "DSP shutdown\n"); + + mutex_lock(&tas5805m->lock); + tas5805m->is_powered = false; + + regmap_write(rm, REG_PAGE, 0x00); + regmap_write(rm, REG_BOOK, 0x00); + + regmap_read(rm, REG_CHAN_FAULT, &chan); + regmap_read(rm, REG_GLOBAL_FAULT1, &global1); + regmap_read(rm, REG_GLOBAL_FAULT2, &global2); + + dev_dbg(component->dev, + "fault regs: CHAN=%02x, GLOBAL1=%02x, GLOBAL2=%02x\n", + chan, global1, global2); + + regmap_write(rm, REG_DEVICE_CTRL_2, DCTRL2_MODE_HIZ); + mutex_unlock(&tas5805m->lock); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static const struct snd_soc_dapm_route tas5805m_audio_map[] = { + { "DAC", NULL, "DAC IN" }, + { "OUT", NULL, "DAC" }, +}; + +static const struct snd_soc_dapm_widget tas5805m_dapm_widgets[] = { + SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_OUTPUT("OUT") +}; + +static const struct snd_soc_component_driver soc_codec_dev_tas5805m = { + .controls = tas5805m_snd_controls, + .num_controls = ARRAY_SIZE(tas5805m_snd_controls), + .dapm_widgets = tas5805m_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(tas5805m_dapm_widgets), + .dapm_routes = tas5805m_audio_map, + .num_dapm_routes = ARRAY_SIZE(tas5805m_audio_map), + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, +}; + +static int tas5805m_mute(struct snd_soc_dai *dai, int mute, int direction) +{ + struct snd_soc_component *component = dai->component; + struct tas5805m_priv *tas5805m = + snd_soc_component_get_drvdata(component); + + mutex_lock(&tas5805m->lock); + dev_dbg(component->dev, "set mute=%d (is_powered=%d)\n", + mute, tas5805m->is_powered); + tas5805m->is_muted = !!mute; + if (tas5805m->is_powered) + tas5805m_refresh_unlocked(component); + mutex_unlock(&tas5805m->lock); + + return 0; +} + +static const struct snd_soc_dai_ops tas5805m_dai_ops = { + .trigger = tas5805m_trigger, + .mute_stream = tas5805m_mute, + .no_capture_mute = 1, +}; + +static struct snd_soc_dai_driver tas5805m_dai = { + .name = "tas5805m-amplifier", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S32_LE, + }, + .ops = &tas5805m_dai_ops, +}; + +static const struct regmap_config tas5805m_regmap = { + .reg_bits = 8, + .val_bits = 8, + + /* We have quite a lot of multi-level bank switching and a + * relatively small number of register writes between bank + * switches. + */ + .cache_type = REGCACHE_NONE, +}; + +static int tas5805m_i2c_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct regmap *regmap; + struct tas5805m_priv *tas5805m; + int ret; + + regmap = devm_regmap_init_i2c(i2c, &tas5805m_regmap); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(dev, "unable to allocate register map: %d\n", ret); + return ret; + } + + tas5805m = devm_kzalloc(dev, sizeof(struct tas5805m_priv), GFP_KERNEL); + if (!tas5805m) + return -ENOMEM; + + tas5805m->pvdd = devm_regulator_get(dev, "pvdd"); + if (IS_ERR(tas5805m->pvdd)) { + dev_err(dev, "failed to get pvdd supply: %ld\n", + PTR_ERR(tas5805m->pvdd)); + return PTR_ERR(tas5805m->pvdd); + } + + dev_set_drvdata(dev, tas5805m); + tas5805m->regmap = regmap; + tas5805m->gpio_pdn_n = devm_gpiod_get(dev, "pdn", GPIOD_OUT_LOW); + if (IS_ERR(tas5805m->gpio_pdn_n)) { + dev_err(dev, "error requesting PDN gpio: %ld\n", + PTR_ERR(tas5805m->gpio_pdn_n)); + return PTR_ERR(tas5805m->gpio_pdn_n); + } + + tas5805m->dsp_cfg_len = of_property_count_elems_of_size(dev->of_node, + "ti,dsp-config", 1); + if (tas5805m->dsp_cfg_len < 0) { + dev_err(dev, "no DSP config provided\n"); + return tas5805m->dsp_cfg_len; + } + + tas5805m->dsp_cfg_data = devm_kmalloc(dev, tas5805m->dsp_cfg_len, + GFP_KERNEL); + if (!tas5805m->dsp_cfg_data) + return -ENOMEM; + + of_property_read_u8_array(dev->of_node, "ti,dsp-config", + tas5805m->dsp_cfg_data, tas5805m->dsp_cfg_len); + dev_dbg(dev, "%d bytes of DSP config loaded\n", + tas5805m->dsp_cfg_len); + + /* Do the first part of the power-on here, while we can expect + * the I2S interface to be quiet. We must raise PDN# and then + * wait 5ms before any I2S clock is sent, or else the internal + * regulator apparently won't come on. + * + * Also, we must keep the device in power down for 100ms or so + * after PVDD is applied, or else the ADR pin is sampled + * incorrectly and the device comes up with an unpredictable I2C + * address. + */ + tas5805m->vol[0] = TAS5805M_VOLUME_MIN; + tas5805m->vol[1] = TAS5805M_VOLUME_MIN; + mutex_init(&tas5805m->lock); + + ret = regulator_enable(tas5805m->pvdd); + if (ret < 0) { + dev_err(dev, "failed to enable pvdd: %d\n", ret); + return ret; + } + + usleep_range(100000, 150000); + gpiod_set_value(tas5805m->gpio_pdn_n, 1); + usleep_range(10000, 15000); + + /* Don't register through devm. We need to be able to unregister + * the component prior to deasserting PDN# + */ + ret = snd_soc_register_component(dev, &soc_codec_dev_tas5805m, + &tas5805m_dai, 1); + if (ret < 0) { + dev_err(dev, "unable to register codec: %d\n", ret); + gpiod_set_value(tas5805m->gpio_pdn_n, 0); + regulator_disable(tas5805m->pvdd); + return ret; + } + + return 0; +} + +static int tas5805m_i2c_remove(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct tas5805m_priv *tas5805m = dev_get_drvdata(dev); + + snd_soc_unregister_component(dev); + gpiod_set_value(tas5805m->gpio_pdn_n, 0); + usleep_range(10000, 15000); + regulator_disable(tas5805m->pvdd); + return 0; +} + +static const struct i2c_device_id tas5805m_i2c_id[] = { + { "tas5805m", }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tas5805m_i2c_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id tas5805m_of_match[] = { + { .compatible = "ti,tas5805m", }, + { } +}; +MODULE_DEVICE_TABLE(of, tas5805m_of_match); +#endif + +static struct i2c_driver tas5805m_i2c_driver = { + .probe_new = tas5805m_i2c_probe, + .remove = tas5805m_i2c_remove, + .id_table = tas5805m_i2c_id, + .driver = { + .name = "tas5805m", + .of_match_table = of_match_ptr(tas5805m_of_match), + }, +}; + +module_i2c_driver(tas5805m_i2c_driver); + +MODULE_AUTHOR("Andy Liu andy-liu@ti.com"); +MODULE_AUTHOR("Daniel Beer daniel.beer@igorinstitute.com"); +MODULE_DESCRIPTION("TAS5805M Audio Amplifier Driver"); +MODULE_LICENSE("GPL v2");