diff options
Diffstat (limited to 'tas5825m-module/tas5825m.c')
| -rw-r--r-- | tas5825m-module/tas5825m.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/tas5825m-module/tas5825m.c b/tas5825m-module/tas5825m.c new file mode 100644 index 0000000..fdca808 --- /dev/null +++ b/tas5825m-module/tas5825m.c @@ -0,0 +1,324 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * tas5825.c - ALSA SoC Texas Instruments TAS5825M Audio Amplifier + * + * Copyright (C) 2020 Aurelien Jarno <aurelien@aurel32.net> + * + * Author: Aurelien Jarno <aurelien@aurel32.net> + */ + +#include <linux/module.h> +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/gpio/consumer.h> +#include <sound/pcm.h> +#include <sound/soc.h> + +#include "tas5825m.h" + +struct tas5825m_data { + struct gpio_desc *pdn_gpio; +}; + +static const struct snd_soc_dapm_widget tas5825m_widgets[] = { + SND_SOC_DAPM_OUTPUT("OUT"), +}; + +static const struct snd_soc_dapm_route tas5825m_routes[] = { + { "OUT", NULL, "Playback" }, +}; + +static struct snd_soc_component_driver soc_component_dev_tas5825m = { + .dapm_widgets = tas5825m_widgets, + .num_dapm_widgets = ARRAY_SIZE(tas5825m_widgets), + .dapm_routes = tas5825m_routes, + .num_dapm_routes = ARRAY_SIZE(tas5825m_routes), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, +}; + +static struct snd_soc_dai_driver tas5825m_dai = { + .name = "tas5825m-amplifier", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = TAS5825M_RATES, + .formats = TAS5825M_FORMATS, + }, +}; + +#ifdef CONFIG_OF +static const struct of_device_id tas5825m_of_ids[] = { + { .compatible = "ti,tas5825m", }, + { } +}; +MODULE_DEVICE_TABLE(of, tas5825m_of_ids); +#endif + +static void tas5825m_write_reg(struct i2c_client *client, uint8_t reg, uint8_t val) +{ + uint8_t buf[2]; + int ret; + + buf[0] = reg; + buf[1] = val; + + ret = i2c_master_send(client, buf, sizeof(buf)); + if (ret < 0) + dev_err(&client->dev, "unable to write reg 0x%02x, value 0x%02x\n", reg, val); +} + +static int tas5825m_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct tas5825m_data *tas5825m; + int ret; + + tas5825m = devm_kzalloc(dev, sizeof(*tas5825m), GFP_KERNEL); + if (!tas5825m) + return -ENOMEM; + dev_set_drvdata(dev, tas5825m); + + /* + * Get control of the pdn pin and set it LOW to take the codec + * out of the power-down mode. + * Note: The actual pin polarity is taken care of in the GPIO lib + * according the polarity specified in the DTS. + */ + tas5825m->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW); + + if (IS_ERR(tas5825m->pdn_gpio)) { + if (PTR_ERR(tas5825m->pdn_gpio) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_info(dev, "failed to get pdn GPIO: %ld\n", + PTR_ERR(tas5825m->pdn_gpio)); + tas5825m->pdn_gpio = NULL; + } + + /* power-up time may be as long as 1ms */ + mdelay(1); + + /* PAGE 0x00, BOOK 0x00 */ + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x7f, 0x00); + + /* Reset register and digital core */ + tas5825m_write_reg(client, 0x01, 0x11); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + + /* PAGE 0x00, BOOK 0x00 */ + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x7f, 0x00); + + /* Switch from deep sleep to Hi-z mode, keep mute enabled */ + tas5825m_write_reg(client, 0x03, 0x12); + + /* GPIO0, GPIO1 and GPIO2 as output */ + tas5825m_write_reg(client, 0x60, 0x07); + tas5825m_write_reg(client, 0x61, 0x02); + tas5825m_write_reg(client, 0x62, 0x02); + tas5825m_write_reg(client, 0x63, 0x02); + + /* GPIO0 = 1, GPIO1 = 0, GPIO2 = 1 */ +// tas5825m_write_reg(client, 0x65, 0x05); + tas5825m_write_reg(client, 0x65, 0x00); + + /* ??? */ + tas5825m_write_reg(client, 0x7f, 0x00); + tas5825m_write_reg(client, 0x7d, 0x11); /* ???? */ + tas5825m_write_reg(client, 0x7e, 0xff); /* ???? */ + tas5825m_write_reg(client, 0x00, 0x01); /* Page 0x01 */ + tas5825m_write_reg(client, 0x51, 0x05); + tas5825m_write_reg(client, 0x00, 0x02); /* Page 0x02 */ + tas5825m_write_reg(client, 0x19, 0xa0); + tas5825m_write_reg(client, 0x1d, 0x01); + tas5825m_write_reg(client, 0x00, 0x00); /* Page 0x00 */ + tas5825m_write_reg(client, 0x7f, 0x00); /* Book 0x00 */ + tas5825m_write_reg(client, 0x46, 0x01); /* DSP_CTRL */ + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x02, 0x42); /* # 768kHz, BTL, Hybrid mode */ + tas5825m_write_reg(client, 0x53, 0x60); /* # 175kHz bandwidth */ + tas5825m_write_reg(client, 0x54, 0x04); /* Analog gain of -2.0dB (originally 0) */ + tas5825m_write_reg(client, 0x00, 0x00); /* Page 0x00 */ + tas5825m_write_reg(client, 0x7f, 0x00); /* Book 0x00 */ + tas5825m_write_reg(client, 0x03, 0x02); /* Hiz, unmute */ + + mdelay(5); + + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x00, 0x00); + tas5825m_write_reg(client, 0x7f, 0x8c); /* Book 0x8c */ + tas5825m_write_reg(client, 0x00, 0x06); /* Page 0x06 */ + tas5825m_write_reg(client, 0x38, 0x00); + tas5825m_write_reg(client, 0x39, 0x00); + tas5825m_write_reg(client, 0x3a, 0x04); + tas5825m_write_reg(client, 0x3b, 0x00); + + /* Tuning coeffs */ + tas5825m_write_reg(client, 0x00, 0x0b); /* Page 0x0b */ + tas5825m_write_reg(client, 0x50, 0x00); + tas5825m_write_reg(client, 0x51, 0x20); + tas5825m_write_reg(client, 0x52, 0xc4); + tas5825m_write_reg(client, 0x53, 0x9c); + tas5825m_write_reg(client, 0x5c, 0x7f); + tas5825m_write_reg(client, 0x5d, 0xff); + tas5825m_write_reg(client, 0x5e, 0xff); + tas5825m_write_reg(client, 0x5f, 0xff); + + /* Book 0x8c */ + tas5825m_write_reg(client, 0x00, 0x00); /* Page 0x00 */ + tas5825m_write_reg(client, 0x7f, 0x8c); /* Book 0x8c */ + + tas5825m_write_reg(client, 0x00, 0x01); /* Page 0x01 */ + tas5825m_write_reg(client, 0x28, 0x40); /* => enable AGL */ + tas5825m_write_reg(client, 0x29, 0x00); + tas5825m_write_reg(client, 0x2a, 0x00); + tas5825m_write_reg(client, 0x2b, 0x00); + + tas5825m_write_reg(client, 0x00, 0x0a); /* Page 0x0a */ + tas5825m_write_reg(client, 0x64, 0x00); /* Digital left from left = 0x00800000 */ + tas5825m_write_reg(client, 0x65, 0x80); + tas5825m_write_reg(client, 0x66, 0x00); + tas5825m_write_reg(client, 0x67, 0x00); + tas5825m_write_reg(client, 0x68, 0x00); /* Digital left from right = 0x00000000 */ + tas5825m_write_reg(client, 0x69, 0x00); + tas5825m_write_reg(client, 0x6a, 0x00); + tas5825m_write_reg(client, 0x6b, 0x00); + tas5825m_write_reg(client, 0x6c, 0x00); /* Digital right from left = 0x00000000 */ + tas5825m_write_reg(client, 0x6d, 0x00); + tas5825m_write_reg(client, 0x6e, 0x00); + tas5825m_write_reg(client, 0x6f, 0x00); + tas5825m_write_reg(client, 0x70, 0x00); /* Digital right from right = 0x008000000 */ + tas5825m_write_reg(client, 0x71, 0x80); + tas5825m_write_reg(client, 0x72, 0x00); + tas5825m_write_reg(client, 0x73, 0x00); + tas5825m_write_reg(client, 0x74, 0x00); /* Analog left from left = 0x008000000 */ + tas5825m_write_reg(client, 0x75, 0x80); + tas5825m_write_reg(client, 0x76, 0x00); + tas5825m_write_reg(client, 0x77, 0x00); + tas5825m_write_reg(client, 0x78, 0x00); /* Analog left from right = 0x00000000 */ + tas5825m_write_reg(client, 0x79, 0x00); + tas5825m_write_reg(client, 0x7a, 0x00); + tas5825m_write_reg(client, 0x7b, 0x00); + tas5825m_write_reg(client, 0x7c, 0x00); /* Analog right from left = 0x00000000 */ + tas5825m_write_reg(client, 0x7d, 0x00); + tas5825m_write_reg(client, 0x7e, 0x00); + tas5825m_write_reg(client, 0x7f, 0x00); + + tas5825m_write_reg(client, 0x00, 0x0b); /* Page 0x0b */ + tas5825m_write_reg(client, 0x08, 0x00); /* Analog right from right = 0x008000000 */ + tas5825m_write_reg(client, 0x09, 0x80); + tas5825m_write_reg(client, 0x0a, 0x00); + tas5825m_write_reg(client, 0x0b, 0x00); + + tas5825m_write_reg(client, 0x38, 0x02); /* AGL PVDD alpha */ + tas5825m_write_reg(client, 0x39, 0xa3); + tas5825m_write_reg(client, 0x3a, 0x9a); + tas5825m_write_reg(client, 0x3b, 0xcc); + tas5825m_write_reg(client, 0x3c, 0x00); /* AGL temp alpha */ + tas5825m_write_reg(client, 0x3d, 0x06); + tas5825m_write_reg(client, 0x3e, 0xd3); + tas5825m_write_reg(client, 0x3f, 0x72); + + tas5825m_write_reg(client, 0x48, 0x04); /* AGL softening filter */ + tas5825m_write_reg(client, 0x49, 0xc1); + tas5825m_write_reg(client, 0x4a, 0xff); + tas5825m_write_reg(client, 0x4b, 0x93); + tas5825m_write_reg(client, 0x4c, 0x01); /* AGL attack rate */ + tas5825m_write_reg(client, 0x4d, 0x12); + tas5825m_write_reg(client, 0x4e, 0x6e); + tas5825m_write_reg(client, 0x4f, 0x98); + + tas5825m_write_reg(client, 0x54, 0x7b); /* AGL softening filter omega */ + tas5825m_write_reg(client, 0x55, 0x3e); + tas5825m_write_reg(client, 0x56, 0x00); + tas5825m_write_reg(client, 0x57, 0x6d); + tas5825m_write_reg(client, 0x58, 0x00); /* AGL release rate */ + tas5825m_write_reg(client, 0x59, 0x00); + tas5825m_write_reg(client, 0x5a, 0xae); + tas5825m_write_reg(client, 0x5b, 0xc3); + + tas5825m_write_reg(client, 0x60, 0x08); /* AGL PVDD threshold*/ + tas5825m_write_reg(client, 0x61, 0x13); + tas5825m_write_reg(client, 0x62, 0x85); + tas5825m_write_reg(client, 0x63, 0x62); + tas5825m_write_reg(client, 0x64, 0x00); /* AGL temp scale */ + tas5825m_write_reg(client, 0x65, 0x80); + tas5825m_write_reg(client, 0x66, 0x00); + tas5825m_write_reg(client, 0x67, 0x00); + tas5825m_write_reg(client, 0x6c, 0x00); /* AGL volt scale */ + tas5825m_write_reg(client, 0x6d, 0x78); + tas5825m_write_reg(client, 0x6e, 0xd6); + tas5825m_write_reg(client, 0x6f, 0xfd); + tas5825m_write_reg(client, 0x70, 0x00); /* Volt/temp scale */ + tas5825m_write_reg(client, 0x71, 0x08); + tas5825m_write_reg(client, 0x72, 0x13); + tas5825m_write_reg(client, 0x73, 0x85); + + /* Register Tuning */ + tas5825m_write_reg(client, 0x00, 0x00); /* Page 0x00 */ + tas5825m_write_reg(client, 0x7f, 0x00); /* Book 0x00 */ + tas5825m_write_reg(client, 0x30, 0x00); /* SDOUT is the DSP output */ + tas5825m_write_reg(client, 0x4c, 0x30); /* Digital volume 0dB */ + tas5825m_write_reg(client, 0x03, 0x03); /* Play mode */ + tas5825m_write_reg(client, 0x00, 0x00); /* Page 0x00 */ + tas5825m_write_reg(client, 0x7f, 0x00); /* Book 0x00 */ + tas5825m_write_reg(client, 0x78, 0x80); /* Clear analog fault */ + + ret = devm_snd_soc_register_component(dev, + &soc_component_dev_tas5825m, + &tas5825m_dai, 1); + if (ret < 0) { + dev_err(dev, "unable to register codec: %d\n", ret); + return ret; + } + + return 0; +} + +static int tas5825m_i2c_remove(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct tas5825m_data *tas5825m = dev_get_drvdata(dev); + + /* put the codec in power-down */ + if (tas5825m->pdn_gpio) + gpiod_set_value_cansleep(tas5825m->pdn_gpio, 1); + + return 0; +} + +static const struct i2c_device_id tas5825m_i2c_ids[] = { + { "tas5825m", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tas5825m_i2c_ids); + +static struct i2c_driver tas5825m_i2c_driver = { + .driver = { + .name = "tas5825m", + .of_match_table = of_match_ptr(tas5825m_of_ids), + }, + .probe = tas5825m_i2c_probe, + .remove = tas5825m_i2c_remove, + .id_table = tas5825m_i2c_ids, +}; + +module_i2c_driver(tas5825m_i2c_driver); + +MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); +MODULE_DESCRIPTION("TAS5825M audio amplifier driver"); +MODULE_LICENSE("GPL"); |