// SPDX-License-Identifier: GPL-2.0 // // Driver for the TAS5805M Audio Amplifier // // Author: Andy Liu // Author: Daniel Beer // // 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-tas5825m-linux-drivers // // It has been simplified a little and reworked for the 5.x ALSA SoC API. #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 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 i2c_client *i2c; struct regulator *pvdd; struct gpio_desc *gpio_pdn_n; uint8_t *dsp_cfg_data; int dsp_cfg_len; struct regmap *regmap; int vol[2]; bool is_powered; bool is_muted; struct work_struct work; struct mutex lock; }; 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(struct tas5805m_priv *tas5805m) { struct regmap *rm = tas5805m->regmap; dev_dbg(&tas5805m->i2c->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]); regmap_write(rm, REG_PAGE, 0x00); regmap_write(rm, REG_BOOK, 0x00); /* 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); int ret = 0; if (!(volume_is_valid(ucontrol->value.integer.value[0]) && volume_is_valid(ucontrol->value.integer.value[1]))) return -EINVAL; mutex_lock(&tas5805m->lock); if (tas5805m->vol[0] != ucontrol->value.integer.value[0] || tas5805m->vol[1] != ucontrol->value.integer.value[1]) { 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(tas5805m); ret = 1; } mutex_unlock(&tas5805m->lock); return ret; } 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); switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: dev_dbg(component->dev, "clock start\n"); schedule_work(&tas5805m->work); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: break; default: return -EINVAL; } return 0; } static void do_work(struct work_struct *work) { struct tas5805m_priv *tas5805m = container_of(work, struct tas5805m_priv, work); struct regmap *rm = tas5805m->regmap; dev_dbg(&tas5805m->i2c->dev, "DSP startup\n"); mutex_lock(&tas5805m->lock); /* 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. */ 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(tas5805m); mutex_unlock(&tas5805m->lock); } static int tas5805m_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 tas5805m_priv *tas5805m = snd_soc_component_get_drvdata(component); struct regmap *rm = tas5805m->regmap; if (event & SND_SOC_DAPM_PRE_PMD) { unsigned int chan, global1, global2; dev_dbg(component->dev, "DSP shutdown\n"); cancel_work_sync(&tas5805m->work); mutex_lock(&tas5805m->lock); if (tas5805m->is_powered) { 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); } 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_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas5805m_dac_event, SND_SOC_DAPM_PRE_PMD), 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, }; 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(tas5805m); 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; char filename[128]; const char *config_name; const struct firmware *fw; 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->i2c = i2c; 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); } /* This configuration must be generated by PPC3. The file loaded * consists of a sequence of register writes, where bytes at * even indices are register addresses and those at odd indices * are register values. * * The fixed portion of PPC3's output prior to the 5ms delay * should be omitted. */ if (device_property_read_string(dev, "ti,dsp-config-name", &config_name)) config_name = "default"; snprintf(filename, sizeof(filename), "tas5805m_dsp_%s.bin", config_name); ret = request_firmware(&fw, filename, dev); if (ret) return ret; if ((fw->size < 2) || (fw->size & 1)) { dev_err(dev, "firmware is invalid\n"); release_firmware(fw); return -EINVAL; } tas5805m->dsp_cfg_len = fw->size; tas5805m->dsp_cfg_data = devm_kmemdup(dev, fw->data, fw->size, GFP_KERNEL); if (!tas5805m->dsp_cfg_data) { release_firmware(fw); return -ENOMEM; } release_firmware(fw); /* 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; 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); INIT_WORK(&tas5805m->work, do_work); mutex_init(&tas5805m->lock); /* 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 void tas5805m_i2c_remove(struct i2c_client *i2c) { struct device *dev = &i2c->dev; struct tas5805m_priv *tas5805m = dev_get_drvdata(dev); cancel_work_sync(&tas5805m->work); snd_soc_unregister_component(dev); gpiod_set_value(tas5805m->gpio_pdn_n, 0); usleep_range(10000, 15000); regulator_disable(tas5805m->pvdd); } 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 = 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 "); MODULE_AUTHOR("Daniel Beer "); MODULE_DESCRIPTION("TAS5805M Audio Amplifier Driver"); MODULE_LICENSE("GPL v2");