331 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver4 *5 * Copyright (C) Nokia Corporation6 *7 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>8 */9 10#include <linux/module.h>11#include <linux/errno.h>12#include <linux/device.h>13#include <linux/i2c.h>14#include <linux/gpio.h>15#include <linux/regulator/consumer.h>16#include <linux/slab.h>17#include <sound/tpa6130a2-plat.h>18#include <sound/soc.h>19#include <sound/tlv.h>20#include <linux/of.h>21#include <linux/of_gpio.h>22#include <linux/regmap.h>23 24#include "tpa6130a2.h"25 26enum tpa_model {27 TPA6130A2,28 TPA6140A2,29};30 31/* This struct is used to save the context */32struct tpa6130a2_data {33 struct device *dev;34 struct regmap *regmap;35 struct regulator *supply;36 int power_gpio;37 enum tpa_model id;38};39 40static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable)41{42 int ret = 0, ret2;43 44 if (enable) {45 ret = regulator_enable(data->supply);46 if (ret != 0) {47 dev_err(data->dev,48 "Failed to enable supply: %d\n", ret);49 return ret;50 }51 /* Power on */52 if (data->power_gpio >= 0)53 gpio_set_value(data->power_gpio, 1);54 55 /* Sync registers */56 regcache_cache_only(data->regmap, false);57 ret = regcache_sync(data->regmap);58 if (ret != 0) {59 dev_err(data->dev,60 "Failed to sync registers: %d\n", ret);61 regcache_cache_only(data->regmap, true);62 if (data->power_gpio >= 0)63 gpio_set_value(data->power_gpio, 0);64 ret2 = regulator_disable(data->supply);65 if (ret2 != 0)66 dev_err(data->dev,67 "Failed to disable supply: %d\n", ret2);68 return ret;69 }70 } else {71 /* Powered off device does not retain registers. While device72 * is off, any register updates (i.e. volume changes) should73 * happen in cache only.74 */75 regcache_mark_dirty(data->regmap);76 regcache_cache_only(data->regmap, true);77 78 /* Power off */79 if (data->power_gpio >= 0)80 gpio_set_value(data->power_gpio, 0);81 82 ret = regulator_disable(data->supply);83 if (ret != 0) {84 dev_err(data->dev,85 "Failed to disable supply: %d\n", ret);86 return ret;87 }88 }89 90 return ret;91}92 93static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w,94 struct snd_kcontrol *kctrl, int event)95{96 struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);97 struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c);98 99 if (SND_SOC_DAPM_EVENT_ON(event)) {100 /* Before widget power up: turn chip on, sync registers */101 return tpa6130a2_power(data, true);102 } else {103 /* After widget power down: turn chip off */104 return tpa6130a2_power(data, false);105 }106}107 108/*109 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going110 * down in gain.111 */112static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,113 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),114 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),115 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),116 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),117 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),118 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),119 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),120 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),121 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),122 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0)123);124 125static const struct snd_kcontrol_new tpa6130a2_controls[] = {126 SOC_SINGLE_TLV("Headphone Playback Volume",127 TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,128 tpa6130_tlv),129};130 131static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,132 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),133 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),134 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0)135);136 137static const struct snd_kcontrol_new tpa6140a2_controls[] = {138 SOC_SINGLE_TLV("Headphone Playback Volume",139 TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,140 tpa6140_tlv),141};142 143static int tpa6130a2_component_probe(struct snd_soc_component *component)144{145 struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component);146 147 if (data->id == TPA6140A2)148 return snd_soc_add_component_controls(component,149 tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls));150 else151 return snd_soc_add_component_controls(component,152 tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls));153}154 155static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {156 SND_SOC_DAPM_INPUT("LEFTIN"),157 SND_SOC_DAPM_INPUT("RIGHTIN"),158 SND_SOC_DAPM_OUTPUT("HPLEFT"),159 SND_SOC_DAPM_OUTPUT("HPRIGHT"),160 161 SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE,162 TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0),163 SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE,164 TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0),165 SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL,166 TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0),167 SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL,168 TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0),169 170 SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL,171 TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event,172 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),173};174 175static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = {176 { "Left PGA", NULL, "LEFTIN" },177 { "Right PGA", NULL, "RIGHTIN" },178 179 { "Left Mute", NULL, "Left PGA" },180 { "Right Mute", NULL, "Right PGA" },181 182 { "HPLEFT", NULL, "Left Mute" },183 { "HPRIGHT", NULL, "Right Mute" },184 185 { "Left PGA", NULL, "Power" },186 { "Right PGA", NULL, "Power" },187};188 189static const struct snd_soc_component_driver tpa6130a2_component_driver = {190 .name = "tpa6130a2",191 .probe = tpa6130a2_component_probe,192 .dapm_widgets = tpa6130a2_dapm_widgets,193 .num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets),194 .dapm_routes = tpa6130a2_dapm_routes,195 .num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes),196};197 198static const struct reg_default tpa6130a2_reg_defaults[] = {199 { TPA6130A2_REG_CONTROL, TPA6130A2_SWS },200 { TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L },201};202 203static const struct regmap_config tpa6130a2_regmap_config = {204 .reg_bits = 8,205 .val_bits = 8,206 .max_register = TPA6130A2_REG_VERSION,207 .reg_defaults = tpa6130a2_reg_defaults,208 .num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults),209 .cache_type = REGCACHE_RBTREE,210};211 212static const struct i2c_device_id tpa6130a2_id[] = {213 { "tpa6130a2", TPA6130A2 },214 { "tpa6140a2", TPA6140A2 },215 { }216};217MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);218 219static int tpa6130a2_probe(struct i2c_client *client)220{221 struct device *dev;222 struct tpa6130a2_data *data;223 struct tpa6130a2_platform_data *pdata = client->dev.platform_data;224 struct device_node *np = client->dev.of_node;225 const struct i2c_device_id *id;226 const char *regulator;227 unsigned int version;228 int ret;229 230 dev = &client->dev;231 232 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);233 if (!data)234 return -ENOMEM;235 236 data->dev = dev;237 238 data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config);239 if (IS_ERR(data->regmap))240 return PTR_ERR(data->regmap);241 242 if (pdata) {243 data->power_gpio = pdata->power_gpio;244 } else if (np) {245 data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);246 } else {247 dev_err(dev, "Platform data not set\n");248 dump_stack();249 return -ENODEV;250 }251 252 i2c_set_clientdata(client, data);253 254 id = i2c_match_id(tpa6130a2_id, client);255 data->id = id->driver_data;256 257 if (data->power_gpio >= 0) {258 ret = devm_gpio_request(dev, data->power_gpio,259 "tpa6130a2 enable");260 if (ret < 0) {261 dev_err(dev, "Failed to request power GPIO (%d)\n",262 data->power_gpio);263 return ret;264 }265 gpio_direction_output(data->power_gpio, 0);266 }267 268 switch (data->id) {269 default:270 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",271 data->id);272 fallthrough;273 case TPA6130A2:274 regulator = "Vdd";275 break;276 case TPA6140A2:277 regulator = "AVdd";278 break;279 }280 281 data->supply = devm_regulator_get(dev, regulator);282 if (IS_ERR(data->supply)) {283 ret = PTR_ERR(data->supply);284 dev_err(dev, "Failed to request supply: %d\n", ret);285 return ret;286 }287 288 ret = tpa6130a2_power(data, true);289 if (ret != 0)290 return ret;291 292 293 /* Read version */294 regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version);295 version &= TPA6130A2_VERSION_MASK;296 if ((version != 1) && (version != 2))297 dev_warn(dev, "UNTESTED version detected (%d)\n", version);298 299 /* Disable the chip */300 ret = tpa6130a2_power(data, false);301 if (ret != 0)302 return ret;303 304 return devm_snd_soc_register_component(&client->dev,305 &tpa6130a2_component_driver, NULL, 0);306}307 308#if IS_ENABLED(CONFIG_OF)309static const struct of_device_id tpa6130a2_of_match[] = {310 { .compatible = "ti,tpa6130a2", },311 { .compatible = "ti,tpa6140a2" },312 {},313};314MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);315#endif316 317static struct i2c_driver tpa6130a2_i2c_driver = {318 .driver = {319 .name = "tpa6130a2",320 .of_match_table = of_match_ptr(tpa6130a2_of_match),321 },322 .probe = tpa6130a2_probe,323 .id_table = tpa6130a2_id,324};325 326module_i2c_driver(tpa6130a2_i2c_driver);327 328MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");329MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");330MODULE_LICENSE("GPL");331