1 /* 2 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver 3 * 4 * Copyright (C) Nokia Corporation 5 * 6 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 20 * 02110-1301 USA 21 */ 22 23 #include <linux/module.h> 24 #include <linux/errno.h> 25 #include <linux/device.h> 26 #include <linux/i2c.h> 27 #include <linux/gpio.h> 28 #include <linux/regulator/consumer.h> 29 #include <linux/slab.h> 30 #include <sound/tpa6130a2-plat.h> 31 #include <sound/soc.h> 32 #include <sound/tlv.h> 33 #include <linux/of.h> 34 #include <linux/of_gpio.h> 35 #include <linux/regmap.h> 36 37 #include "tpa6130a2.h" 38 39 enum tpa_model { 40 TPA6130A2, 41 TPA6140A2, 42 }; 43 44 /* This struct is used to save the context */ 45 struct tpa6130a2_data { 46 struct device *dev; 47 struct regmap *regmap; 48 struct regulator *supply; 49 int power_gpio; 50 enum tpa_model id; 51 }; 52 53 static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable) 54 { 55 int ret = 0, ret2; 56 57 if (enable) { 58 ret = regulator_enable(data->supply); 59 if (ret != 0) { 60 dev_err(data->dev, 61 "Failed to enable supply: %d\n", ret); 62 return ret; 63 } 64 /* Power on */ 65 if (data->power_gpio >= 0) 66 gpio_set_value(data->power_gpio, 1); 67 68 /* Sync registers */ 69 regcache_cache_only(data->regmap, false); 70 ret = regcache_sync(data->regmap); 71 if (ret != 0) { 72 dev_err(data->dev, 73 "Failed to sync registers: %d\n", ret); 74 regcache_cache_only(data->regmap, true); 75 if (data->power_gpio >= 0) 76 gpio_set_value(data->power_gpio, 0); 77 ret2 = regulator_disable(data->supply); 78 if (ret2 != 0) 79 dev_err(data->dev, 80 "Failed to disable supply: %d\n", ret2); 81 return ret; 82 } 83 } else { 84 /* Powered off device does not retain registers. While device 85 * is off, any register updates (i.e. volume changes) should 86 * happen in cache only. 87 */ 88 regcache_mark_dirty(data->regmap); 89 regcache_cache_only(data->regmap, true); 90 91 /* Power off */ 92 if (data->power_gpio >= 0) 93 gpio_set_value(data->power_gpio, 0); 94 95 ret = regulator_disable(data->supply); 96 if (ret != 0) { 97 dev_err(data->dev, 98 "Failed to disable supply: %d\n", ret); 99 return ret; 100 } 101 } 102 103 return ret; 104 } 105 106 static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w, 107 struct snd_kcontrol *kctrl, int event) 108 { 109 struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); 110 struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c); 111 112 if (SND_SOC_DAPM_EVENT_ON(event)) { 113 /* Before widget power up: turn chip on, sync registers */ 114 return tpa6130a2_power(data, true); 115 } else { 116 /* After widget power down: turn chip off */ 117 return tpa6130a2_power(data, false); 118 } 119 } 120 121 /* 122 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going 123 * down in gain. 124 */ 125 static const DECLARE_TLV_DB_RANGE(tpa6130_tlv, 126 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), 127 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), 128 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), 129 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), 130 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), 131 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), 132 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), 133 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), 134 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), 135 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0) 136 ); 137 138 static const struct snd_kcontrol_new tpa6130a2_controls[] = { 139 SOC_SINGLE_TLV("Headphone Playback Volume", 140 TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, 141 tpa6130_tlv), 142 }; 143 144 static const DECLARE_TLV_DB_RANGE(tpa6140_tlv, 145 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), 146 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), 147 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0) 148 ); 149 150 static const struct snd_kcontrol_new tpa6140a2_controls[] = { 151 SOC_SINGLE_TLV("Headphone Playback Volume", 152 TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, 153 tpa6140_tlv), 154 }; 155 156 static int tpa6130a2_component_probe(struct snd_soc_component *component) 157 { 158 struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component); 159 160 if (data->id == TPA6140A2) 161 return snd_soc_add_component_controls(component, 162 tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls)); 163 else 164 return snd_soc_add_component_controls(component, 165 tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls)); 166 } 167 168 static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = { 169 SND_SOC_DAPM_INPUT("LEFTIN"), 170 SND_SOC_DAPM_INPUT("RIGHTIN"), 171 SND_SOC_DAPM_OUTPUT("HPLEFT"), 172 SND_SOC_DAPM_OUTPUT("HPRIGHT"), 173 174 SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE, 175 TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0), 176 SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE, 177 TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0), 178 SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL, 179 TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0), 180 SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL, 181 TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0), 182 183 SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL, 184 TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event, 185 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 186 }; 187 188 static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = { 189 { "Left PGA", NULL, "LEFTIN" }, 190 { "Right PGA", NULL, "RIGHTIN" }, 191 192 { "Left Mute", NULL, "Left PGA" }, 193 { "Right Mute", NULL, "Right PGA" }, 194 195 { "HPLEFT", NULL, "Left Mute" }, 196 { "HPRIGHT", NULL, "Right Mute" }, 197 198 { "Left PGA", NULL, "Power" }, 199 { "Right PGA", NULL, "Power" }, 200 }; 201 202 static const struct snd_soc_component_driver tpa6130a2_component_driver = { 203 .name = "tpa6130a2", 204 .probe = tpa6130a2_component_probe, 205 .dapm_widgets = tpa6130a2_dapm_widgets, 206 .num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets), 207 .dapm_routes = tpa6130a2_dapm_routes, 208 .num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes), 209 }; 210 211 static const struct reg_default tpa6130a2_reg_defaults[] = { 212 { TPA6130A2_REG_CONTROL, TPA6130A2_SWS }, 213 { TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L }, 214 }; 215 216 static const struct regmap_config tpa6130a2_regmap_config = { 217 .reg_bits = 8, 218 .val_bits = 8, 219 .max_register = TPA6130A2_REG_VERSION, 220 .reg_defaults = tpa6130a2_reg_defaults, 221 .num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults), 222 .cache_type = REGCACHE_RBTREE, 223 }; 224 225 static int tpa6130a2_probe(struct i2c_client *client, 226 const struct i2c_device_id *id) 227 { 228 struct device *dev; 229 struct tpa6130a2_data *data; 230 struct tpa6130a2_platform_data *pdata = client->dev.platform_data; 231 struct device_node *np = client->dev.of_node; 232 const char *regulator; 233 unsigned int version; 234 int ret; 235 236 dev = &client->dev; 237 238 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 239 if (!data) 240 return -ENOMEM; 241 242 data->dev = dev; 243 244 data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config); 245 if (IS_ERR(data->regmap)) 246 return PTR_ERR(data->regmap); 247 248 if (pdata) { 249 data->power_gpio = pdata->power_gpio; 250 } else if (np) { 251 data->power_gpio = of_get_named_gpio(np, "power-gpio", 0); 252 } else { 253 dev_err(dev, "Platform data not set\n"); 254 dump_stack(); 255 return -ENODEV; 256 } 257 258 i2c_set_clientdata(client, data); 259 260 data->id = id->driver_data; 261 262 if (data->power_gpio >= 0) { 263 ret = devm_gpio_request(dev, data->power_gpio, 264 "tpa6130a2 enable"); 265 if (ret < 0) { 266 dev_err(dev, "Failed to request power GPIO (%d)\n", 267 data->power_gpio); 268 return ret; 269 } 270 gpio_direction_output(data->power_gpio, 0); 271 } 272 273 switch (data->id) { 274 default: 275 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", 276 data->id); 277 /* fall through */ 278 case TPA6130A2: 279 regulator = "Vdd"; 280 break; 281 case TPA6140A2: 282 regulator = "AVdd"; 283 break; 284 } 285 286 data->supply = devm_regulator_get(dev, regulator); 287 if (IS_ERR(data->supply)) { 288 ret = PTR_ERR(data->supply); 289 dev_err(dev, "Failed to request supply: %d\n", ret); 290 return ret; 291 } 292 293 ret = tpa6130a2_power(data, true); 294 if (ret != 0) 295 return ret; 296 297 298 /* Read version */ 299 regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version); 300 version &= TPA6130A2_VERSION_MASK; 301 if ((version != 1) && (version != 2)) 302 dev_warn(dev, "UNTESTED version detected (%d)\n", version); 303 304 /* Disable the chip */ 305 ret = tpa6130a2_power(data, false); 306 if (ret != 0) 307 return ret; 308 309 return devm_snd_soc_register_component(&client->dev, 310 &tpa6130a2_component_driver, NULL, 0); 311 } 312 313 static const struct i2c_device_id tpa6130a2_id[] = { 314 { "tpa6130a2", TPA6130A2 }, 315 { "tpa6140a2", TPA6140A2 }, 316 { } 317 }; 318 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); 319 320 #if IS_ENABLED(CONFIG_OF) 321 static const struct of_device_id tpa6130a2_of_match[] = { 322 { .compatible = "ti,tpa6130a2", }, 323 { .compatible = "ti,tpa6140a2" }, 324 {}, 325 }; 326 MODULE_DEVICE_TABLE(of, tpa6130a2_of_match); 327 #endif 328 329 static struct i2c_driver tpa6130a2_i2c_driver = { 330 .driver = { 331 .name = "tpa6130a2", 332 .of_match_table = of_match_ptr(tpa6130a2_of_match), 333 }, 334 .probe = tpa6130a2_probe, 335 .id_table = tpa6130a2_id, 336 }; 337 338 module_i2c_driver(tpa6130a2_i2c_driver); 339 340 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); 341 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); 342 MODULE_LICENSE("GPL"); 343