diff options
Diffstat (limited to 'sound/soc/codecs/tpa6130a2.c')
| -rw-r--r-- | sound/soc/codecs/tpa6130a2.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c new file mode 100644 index 000000000..616cd4beb --- /dev/null +++ b/sound/soc/codecs/tpa6130a2.c @@ -0,0 +1,342 @@ +/* + * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver + * + * Copyright (C) Nokia Corporation + * + * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <sound/tpa6130a2-plat.h> +#include <sound/soc.h> +#include <sound/tlv.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/regmap.h> + +#include "tpa6130a2.h" + +enum tpa_model { + TPA6130A2, + TPA6140A2, +}; + +/* This struct is used to save the context */ +struct tpa6130a2_data { + struct device *dev; + struct regmap *regmap; + struct regulator *supply; + int power_gpio; + enum tpa_model id; +}; + +static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable) +{ + int ret = 0, ret2; + + if (enable) { + ret = regulator_enable(data->supply); + if (ret != 0) { + dev_err(data->dev, + "Failed to enable supply: %d\n", ret); + return ret; + } + /* Power on */ + if (data->power_gpio >= 0) + gpio_set_value(data->power_gpio, 1); + + /* Sync registers */ + regcache_cache_only(data->regmap, false); + ret = regcache_sync(data->regmap); + if (ret != 0) { + dev_err(data->dev, + "Failed to sync registers: %d\n", ret); + regcache_cache_only(data->regmap, true); + if (data->power_gpio >= 0) + gpio_set_value(data->power_gpio, 0); + ret2 = regulator_disable(data->supply); + if (ret2 != 0) + dev_err(data->dev, + "Failed to disable supply: %d\n", ret2); + return ret; + } + } else { + /* Powered off device does not retain registers. While device + * is off, any register updates (i.e. volume changes) should + * happen in cache only. + */ + regcache_mark_dirty(data->regmap); + regcache_cache_only(data->regmap, true); + + /* Power off */ + if (data->power_gpio >= 0) + gpio_set_value(data->power_gpio, 0); + + ret = regulator_disable(data->supply); + if (ret != 0) { + dev_err(data->dev, + "Failed to disable supply: %d\n", ret); + return ret; + } + } + + return ret; +} + +static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kctrl, int event) +{ + struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); + struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c); + + if (SND_SOC_DAPM_EVENT_ON(event)) { + /* Before widget power up: turn chip on, sync registers */ + return tpa6130a2_power(data, true); + } else { + /* After widget power down: turn chip off */ + return tpa6130a2_power(data, false); + } +} + +/* + * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going + * down in gain. + */ +static const DECLARE_TLV_DB_RANGE(tpa6130_tlv, + 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), + 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), + 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), + 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), + 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), + 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), + 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), + 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), + 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), + 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0) +); + +static const struct snd_kcontrol_new tpa6130a2_controls[] = { + SOC_SINGLE_TLV("Headphone Playback Volume", + TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, + tpa6130_tlv), +}; + +static const DECLARE_TLV_DB_RANGE(tpa6140_tlv, + 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), + 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), + 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0) +); + +static const struct snd_kcontrol_new tpa6140a2_controls[] = { + SOC_SINGLE_TLV("Headphone Playback Volume", + TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, + tpa6140_tlv), +}; + +static int tpa6130a2_component_probe(struct snd_soc_component *component) +{ + struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component); + + if (data->id == TPA6140A2) + return snd_soc_add_component_controls(component, + tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls)); + else + return snd_soc_add_component_controls(component, + tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls)); +} + +static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = { + SND_SOC_DAPM_INPUT("LEFTIN"), + SND_SOC_DAPM_INPUT("RIGHTIN"), + SND_SOC_DAPM_OUTPUT("HPLEFT"), + SND_SOC_DAPM_OUTPUT("HPRIGHT"), + + SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE, + TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0), + SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE, + TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0), + SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL, + TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0), + SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL, + TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0), + + SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL, + TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event, + SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), +}; + +static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = { + { "Left PGA", NULL, "LEFTIN" }, + { "Right PGA", NULL, "RIGHTIN" }, + + { "Left Mute", NULL, "Left PGA" }, + { "Right Mute", NULL, "Right PGA" }, + + { "HPLEFT", NULL, "Left Mute" }, + { "HPRIGHT", NULL, "Right Mute" }, + + { "Left PGA", NULL, "Power" }, + { "Right PGA", NULL, "Power" }, +}; + +static const struct snd_soc_component_driver tpa6130a2_component_driver = { + .name = "tpa6130a2", + .probe = tpa6130a2_component_probe, + .dapm_widgets = tpa6130a2_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets), + .dapm_routes = tpa6130a2_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes), +}; + +static const struct reg_default tpa6130a2_reg_defaults[] = { + { TPA6130A2_REG_CONTROL, TPA6130A2_SWS }, + { TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L }, +}; + +static const struct regmap_config tpa6130a2_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = TPA6130A2_REG_VERSION, + .reg_defaults = tpa6130a2_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults), + .cache_type = REGCACHE_RBTREE, +}; + +static int tpa6130a2_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev; + struct tpa6130a2_data *data; + struct tpa6130a2_platform_data *pdata = client->dev.platform_data; + struct device_node *np = client->dev.of_node; + const char *regulator; + unsigned int version; + int ret; + + dev = &client->dev; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->dev = dev; + + data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + if (pdata) { + data->power_gpio = pdata->power_gpio; + } else if (np) { + data->power_gpio = of_get_named_gpio(np, "power-gpio", 0); + } else { + dev_err(dev, "Platform data not set\n"); + dump_stack(); + return -ENODEV; + } + + i2c_set_clientdata(client, data); + + data->id = id->driver_data; + + if (data->power_gpio >= 0) { + ret = devm_gpio_request(dev, data->power_gpio, + "tpa6130a2 enable"); + if (ret < 0) { + dev_err(dev, "Failed to request power GPIO (%d)\n", + data->power_gpio); + return ret; + } + gpio_direction_output(data->power_gpio, 0); + } + + switch (data->id) { + default: + dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", + data->id); + /* fall through */ + case TPA6130A2: + regulator = "Vdd"; + break; + case TPA6140A2: + regulator = "AVdd"; + break; + } + + data->supply = devm_regulator_get(dev, regulator); + if (IS_ERR(data->supply)) { + ret = PTR_ERR(data->supply); + dev_err(dev, "Failed to request supply: %d\n", ret); + return ret; + } + + ret = tpa6130a2_power(data, true); + if (ret != 0) + return ret; + + + /* Read version */ + regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version); + version &= TPA6130A2_VERSION_MASK; + if ((version != 1) && (version != 2)) + dev_warn(dev, "UNTESTED version detected (%d)\n", version); + + /* Disable the chip */ + ret = tpa6130a2_power(data, false); + if (ret != 0) + return ret; + + return devm_snd_soc_register_component(&client->dev, + &tpa6130a2_component_driver, NULL, 0); +} + +static const struct i2c_device_id tpa6130a2_id[] = { + { "tpa6130a2", TPA6130A2 }, + { "tpa6140a2", TPA6140A2 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id tpa6130a2_of_match[] = { + { .compatible = "ti,tpa6130a2", }, + { .compatible = "ti,tpa6140a2" }, + {}, +}; +MODULE_DEVICE_TABLE(of, tpa6130a2_of_match); +#endif + +static struct i2c_driver tpa6130a2_i2c_driver = { + .driver = { + .name = "tpa6130a2", + .of_match_table = of_match_ptr(tpa6130a2_of_match), + }, + .probe = tpa6130a2_probe, + .id_table = tpa6130a2_id, +}; + +module_i2c_driver(tpa6130a2_i2c_driver); + +MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); +MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); +MODULE_LICENSE("GPL"); |