1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver 4 * 5 * Copyright (C) Nokia Corporation 6 * 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 26 enum tpa_model { 27 TPA6130A2, 28 TPA6140A2, 29 }; 30 31 /* This struct is used to save the context */ 32 struct 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 40 static 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 device 72 * is off, any register updates (i.e. volume changes) should 73 * 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 93 static 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 going 110 * down in gain. 111 */ 112 static 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 ); 124 125 static 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 }; 130 131 static 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 ); 136 137 static 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 }; 142 143 static 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 else 151 return snd_soc_add_component_controls(component, 152 tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls)); 153 } 154 155 static 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 }; 174 175 static 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 }; 188 189 static 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 }; 197 198 static 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 }; 202 203 static 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 }; 211 212 static int tpa6130a2_probe(struct i2c_client *client, 213 const struct i2c_device_id *id) 214 { 215 struct device *dev; 216 struct tpa6130a2_data *data; 217 struct tpa6130a2_platform_data *pdata = client->dev.platform_data; 218 struct device_node *np = client->dev.of_node; 219 const char *regulator; 220 unsigned int version; 221 int ret; 222 223 dev = &client->dev; 224 225 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 226 if (!data) 227 return -ENOMEM; 228 229 data->dev = dev; 230 231 data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config); 232 if (IS_ERR(data->regmap)) 233 return PTR_ERR(data->regmap); 234 235 if (pdata) { 236 data->power_gpio = pdata->power_gpio; 237 } else if (np) { 238 data->power_gpio = of_get_named_gpio(np, "power-gpio", 0); 239 } else { 240 dev_err(dev, "Platform data not set\n"); 241 dump_stack(); 242 return -ENODEV; 243 } 244 245 i2c_set_clientdata(client, data); 246 247 data->id = id->driver_data; 248 249 if (data->power_gpio >= 0) { 250 ret = devm_gpio_request(dev, data->power_gpio, 251 "tpa6130a2 enable"); 252 if (ret < 0) { 253 dev_err(dev, "Failed to request power GPIO (%d)\n", 254 data->power_gpio); 255 return ret; 256 } 257 gpio_direction_output(data->power_gpio, 0); 258 } 259 260 switch (data->id) { 261 default: 262 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", 263 data->id); 264 /* fall through */ 265 case TPA6130A2: 266 regulator = "Vdd"; 267 break; 268 case TPA6140A2: 269 regulator = "AVdd"; 270 break; 271 } 272 273 data->supply = devm_regulator_get(dev, regulator); 274 if (IS_ERR(data->supply)) { 275 ret = PTR_ERR(data->supply); 276 dev_err(dev, "Failed to request supply: %d\n", ret); 277 return ret; 278 } 279 280 ret = tpa6130a2_power(data, true); 281 if (ret != 0) 282 return ret; 283 284 285 /* Read version */ 286 regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version); 287 version &= TPA6130A2_VERSION_MASK; 288 if ((version != 1) && (version != 2)) 289 dev_warn(dev, "UNTESTED version detected (%d)\n", version); 290 291 /* Disable the chip */ 292 ret = tpa6130a2_power(data, false); 293 if (ret != 0) 294 return ret; 295 296 return devm_snd_soc_register_component(&client->dev, 297 &tpa6130a2_component_driver, NULL, 0); 298 } 299 300 static const struct i2c_device_id tpa6130a2_id[] = { 301 { "tpa6130a2", TPA6130A2 }, 302 { "tpa6140a2", TPA6140A2 }, 303 { } 304 }; 305 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); 306 307 #if IS_ENABLED(CONFIG_OF) 308 static const struct of_device_id tpa6130a2_of_match[] = { 309 { .compatible = "ti,tpa6130a2", }, 310 { .compatible = "ti,tpa6140a2" }, 311 {}, 312 }; 313 MODULE_DEVICE_TABLE(of, tpa6130a2_of_match); 314 #endif 315 316 static struct i2c_driver tpa6130a2_i2c_driver = { 317 .driver = { 318 .name = "tpa6130a2", 319 .of_match_table = of_match_ptr(tpa6130a2_of_match), 320 }, 321 .probe = tpa6130a2_probe, 322 .id_table = tpa6130a2_id, 323 }; 324 325 module_i2c_driver(tpa6130a2_i2c_driver); 326 327 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); 328 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); 329 MODULE_LICENSE("GPL"); 330