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; 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 } else { 68 /* Power off */ 69 if (data->power_gpio >= 0) 70 gpio_set_value(data->power_gpio, 0); 71 72 ret = regulator_disable(data->supply); 73 if (ret != 0) { 74 dev_err(data->dev, 75 "Failed to disable supply: %d\n", ret); 76 return ret; 77 } 78 79 /* device regs does not match the cache state anymore */ 80 regcache_mark_dirty(data->regmap); 81 } 82 83 return ret; 84 } 85 86 static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w, 87 struct snd_kcontrol *kctrl, int event) 88 { 89 struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); 90 struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c); 91 int ret; 92 93 /* before widget power up */ 94 if (SND_SOC_DAPM_EVENT_ON(event)) { 95 /* Turn on the chip */ 96 tpa6130a2_power(data, true); 97 /* Sync the registers */ 98 ret = regcache_sync(data->regmap); 99 if (ret < 0) { 100 dev_err(c->dev, "Failed to initialize chip\n"); 101 tpa6130a2_power(data, false); 102 return ret; 103 } 104 /* after widget power down */ 105 } else { 106 tpa6130a2_power(data, false); 107 } 108 109 return 0; 110 } 111 112 /* 113 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going 114 * down in gain. 115 */ 116 static const DECLARE_TLV_DB_RANGE(tpa6130_tlv, 117 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), 118 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), 119 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), 120 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), 121 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), 122 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), 123 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), 124 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), 125 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), 126 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0) 127 ); 128 129 static const struct snd_kcontrol_new tpa6130a2_controls[] = { 130 SOC_SINGLE_TLV("Headphone Playback Volume", 131 TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, 132 tpa6130_tlv), 133 }; 134 135 static const DECLARE_TLV_DB_RANGE(tpa6140_tlv, 136 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), 137 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), 138 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0) 139 ); 140 141 static const struct snd_kcontrol_new tpa6140a2_controls[] = { 142 SOC_SINGLE_TLV("Headphone Playback Volume", 143 TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, 144 tpa6140_tlv), 145 }; 146 147 static int tpa6130a2_component_probe(struct snd_soc_component *component) 148 { 149 struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component); 150 151 if (data->id == TPA6140A2) 152 return snd_soc_add_component_controls(component, 153 tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls)); 154 else 155 return snd_soc_add_component_controls(component, 156 tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls)); 157 } 158 159 static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = { 160 SND_SOC_DAPM_INPUT("LEFTIN"), 161 SND_SOC_DAPM_INPUT("RIGHTIN"), 162 SND_SOC_DAPM_OUTPUT("HPLEFT"), 163 SND_SOC_DAPM_OUTPUT("HPRIGHT"), 164 165 SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE, 166 TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0), 167 SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE, 168 TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0), 169 SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL, 170 TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0), 171 SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL, 172 TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0), 173 174 SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL, 175 TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event, 176 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 177 }; 178 179 static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = { 180 { "Left PGA", NULL, "LEFTIN" }, 181 { "Right PGA", NULL, "RIGHTIN" }, 182 183 { "Left Mute", NULL, "Left PGA" }, 184 { "Right Mute", NULL, "Right PGA" }, 185 186 { "HPLEFT", NULL, "Left Mute" }, 187 { "HPRIGHT", NULL, "Right Mute" }, 188 189 { "Left PGA", NULL, "Power" }, 190 { "Right PGA", NULL, "Power" }, 191 }; 192 193 struct snd_soc_component_driver tpa6130a2_component_driver = { 194 .name = "tpa6130a2", 195 .probe = tpa6130a2_component_probe, 196 .dapm_widgets = tpa6130a2_dapm_widgets, 197 .num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets), 198 .dapm_routes = tpa6130a2_dapm_routes, 199 .num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes), 200 }; 201 202 static const struct reg_default tpa6130a2_reg_defaults[] = { 203 { TPA6130A2_REG_CONTROL, TPA6130A2_SWS }, 204 { TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L }, 205 }; 206 207 static const struct regmap_config tpa6130a2_regmap_config = { 208 .reg_bits = 8, 209 .val_bits = 8, 210 .max_register = TPA6130A2_REG_VERSION, 211 .reg_defaults = tpa6130a2_reg_defaults, 212 .num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults), 213 .cache_type = REGCACHE_RBTREE, 214 }; 215 216 static int tpa6130a2_probe(struct i2c_client *client, 217 const struct i2c_device_id *id) 218 { 219 struct device *dev; 220 struct tpa6130a2_data *data; 221 struct tpa6130a2_platform_data *pdata = client->dev.platform_data; 222 struct device_node *np = client->dev.of_node; 223 const char *regulator; 224 unsigned int version; 225 int ret; 226 227 dev = &client->dev; 228 229 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 230 if (!data) 231 return -ENOMEM; 232 233 data->dev = dev; 234 235 data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config); 236 if (IS_ERR(data->regmap)) 237 return PTR_ERR(data->regmap); 238 239 if (pdata) { 240 data->power_gpio = pdata->power_gpio; 241 } else if (np) { 242 data->power_gpio = of_get_named_gpio(np, "power-gpio", 0); 243 } else { 244 dev_err(dev, "Platform data not set\n"); 245 dump_stack(); 246 return -ENODEV; 247 } 248 249 i2c_set_clientdata(client, data); 250 251 data->id = id->driver_data; 252 253 if (data->power_gpio >= 0) { 254 ret = devm_gpio_request(dev, data->power_gpio, 255 "tpa6130a2 enable"); 256 if (ret < 0) { 257 dev_err(dev, "Failed to request power GPIO (%d)\n", 258 data->power_gpio); 259 return ret; 260 } 261 gpio_direction_output(data->power_gpio, 0); 262 } 263 264 switch (data->id) { 265 default: 266 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", 267 data->id); 268 case TPA6130A2: 269 regulator = "Vdd"; 270 break; 271 case TPA6140A2: 272 regulator = "AVdd"; 273 break; 274 } 275 276 data->supply = devm_regulator_get(dev, regulator); 277 if (IS_ERR(data->supply)) { 278 ret = PTR_ERR(data->supply); 279 dev_err(dev, "Failed to request supply: %d\n", ret); 280 return ret; 281 } 282 283 ret = tpa6130a2_power(data, true); 284 if (ret != 0) 285 return ret; 286 287 288 /* Read version */ 289 regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version); 290 version &= TPA6130A2_VERSION_MASK; 291 if ((version != 1) && (version != 2)) 292 dev_warn(dev, "UNTESTED version detected (%d)\n", version); 293 294 /* Disable the chip */ 295 ret = tpa6130a2_power(data, false); 296 if (ret != 0) 297 return ret; 298 299 return devm_snd_soc_register_component(&client->dev, 300 &tpa6130a2_component_driver, NULL, 0); 301 } 302 303 static const struct i2c_device_id tpa6130a2_id[] = { 304 { "tpa6130a2", TPA6130A2 }, 305 { "tpa6140a2", TPA6140A2 }, 306 { } 307 }; 308 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); 309 310 #if IS_ENABLED(CONFIG_OF) 311 static const struct of_device_id tpa6130a2_of_match[] = { 312 { .compatible = "ti,tpa6130a2", }, 313 { .compatible = "ti,tpa6140a2" }, 314 {}, 315 }; 316 MODULE_DEVICE_TABLE(of, tpa6130a2_of_match); 317 #endif 318 319 static struct i2c_driver tpa6130a2_i2c_driver = { 320 .driver = { 321 .name = "tpa6130a2", 322 .of_match_table = of_match_ptr(tpa6130a2_of_match), 323 }, 324 .probe = tpa6130a2_probe, 325 .id_table = tpa6130a2_id, 326 }; 327 328 module_i2c_driver(tpa6130a2_i2c_driver); 329 330 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); 331 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); 332 MODULE_LICENSE("GPL"); 333