1/* 2 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver 3 * 4 * Copyright (C) Nokia Corporation 5 * 6 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.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/soc-dapm.h> 33#include <sound/tlv.h> 34 35#include "tpa6130a2.h" 36 37static struct i2c_client *tpa6130a2_client; 38 39/* This struct is used to save the context */ 40struct tpa6130a2_data { 41 struct mutex mutex; 42 unsigned char regs[TPA6130A2_CACHEREGNUM]; 43 struct regulator *supply; 44 int power_gpio; 45 unsigned char power_state; 46 enum tpa_model id; 47}; 48 49static int tpa6130a2_i2c_read(int reg) 50{ 51 struct tpa6130a2_data *data; 52 int val; 53 54 BUG_ON(tpa6130a2_client == NULL); 55 data = i2c_get_clientdata(tpa6130a2_client); 56 57 /* If powered off, return the cached value */ 58 if (data->power_state) { 59 val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); 60 if (val < 0) 61 dev_err(&tpa6130a2_client->dev, "Read failed\n"); 62 else 63 data->regs[reg] = val; 64 } else { 65 val = data->regs[reg]; 66 } 67 68 return val; 69} 70 71static int tpa6130a2_i2c_write(int reg, u8 value) 72{ 73 struct tpa6130a2_data *data; 74 int val = 0; 75 76 BUG_ON(tpa6130a2_client == NULL); 77 data = i2c_get_clientdata(tpa6130a2_client); 78 79 if (data->power_state) { 80 val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); 81 if (val < 0) 82 dev_err(&tpa6130a2_client->dev, "Write failed\n"); 83 } 84 85 /* Either powered on or off, we save the context */ 86 data->regs[reg] = value; 87 88 return val; 89} 90 91static u8 tpa6130a2_read(int reg) 92{ 93 struct tpa6130a2_data *data; 94 95 BUG_ON(tpa6130a2_client == NULL); 96 data = i2c_get_clientdata(tpa6130a2_client); 97 98 return data->regs[reg]; 99} 100 101static void tpa6130a2_initialize(void) 102{ 103 struct tpa6130a2_data *data; 104 int i; 105 106 BUG_ON(tpa6130a2_client == NULL); 107 data = i2c_get_clientdata(tpa6130a2_client); 108 109 for (i = 1; i < TPA6130A2_REG_VERSION; i++) 110 tpa6130a2_i2c_write(i, data->regs[i]); 111} 112 113static int tpa6130a2_power(int power) 114{ 115 struct tpa6130a2_data *data; 116 u8 val; 117 int ret; 118 119 BUG_ON(tpa6130a2_client == NULL); 120 data = i2c_get_clientdata(tpa6130a2_client); 121 122 mutex_lock(&data->mutex); 123 if (power) { 124 /* Power on */ 125 if (data->power_gpio >= 0) 126 gpio_set_value(data->power_gpio, 1); 127 128 ret = regulator_enable(data->supply); 129 if (ret != 0) { 130 dev_err(&tpa6130a2_client->dev, 131 "Failed to enable supply: %d\n", ret); 132 goto exit; 133 } 134 135 data->power_state = 1; 136 tpa6130a2_initialize(); 137 138 /* Clear SWS */ 139 val = tpa6130a2_read(TPA6130A2_REG_CONTROL); 140 val &= ~TPA6130A2_SWS; 141 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); 142 } else { 143 /* set SWS */ 144 val = tpa6130a2_read(TPA6130A2_REG_CONTROL); 145 val |= TPA6130A2_SWS; 146 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); 147 148 /* Power off */ 149 if (data->power_gpio >= 0) 150 gpio_set_value(data->power_gpio, 0); 151 152 ret = regulator_disable(data->supply); 153 if (ret != 0) { 154 dev_err(&tpa6130a2_client->dev, 155 "Failed to disable supply: %d\n", ret); 156 goto exit; 157 } 158 159 data->power_state = 0; 160 } 161 162exit: 163 mutex_unlock(&data->mutex); 164 return ret; 165} 166 167static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, 168 struct snd_ctl_elem_value *ucontrol) 169{ 170 struct soc_mixer_control *mc = 171 (struct soc_mixer_control *)kcontrol->private_value; 172 struct tpa6130a2_data *data; 173 unsigned int reg = mc->reg; 174 unsigned int shift = mc->shift; 175 int max = mc->max; 176 unsigned int mask = (1 << fls(max)) - 1; 177 unsigned int invert = mc->invert; 178 179 BUG_ON(tpa6130a2_client == NULL); 180 data = i2c_get_clientdata(tpa6130a2_client); 181 182 mutex_lock(&data->mutex); 183 184 ucontrol->value.integer.value[0] = 185 (tpa6130a2_read(reg) >> shift) & mask; 186 187 if (invert) 188 ucontrol->value.integer.value[0] = 189 max - ucontrol->value.integer.value[0]; 190 191 mutex_unlock(&data->mutex); 192 return 0; 193} 194 195static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, 196 struct snd_ctl_elem_value *ucontrol) 197{ 198 struct soc_mixer_control *mc = 199 (struct soc_mixer_control *)kcontrol->private_value; 200 struct tpa6130a2_data *data; 201 unsigned int reg = mc->reg; 202 unsigned int shift = mc->shift; 203 int max = mc->max; 204 unsigned int mask = (1 << fls(max)) - 1; 205 unsigned int invert = mc->invert; 206 unsigned int val = (ucontrol->value.integer.value[0] & mask); 207 unsigned int val_reg; 208 209 BUG_ON(tpa6130a2_client == NULL); 210 data = i2c_get_clientdata(tpa6130a2_client); 211 212 if (invert) 213 val = max - val; 214 215 mutex_lock(&data->mutex); 216 217 val_reg = tpa6130a2_read(reg); 218 if (((val_reg >> shift) & mask) == val) { 219 mutex_unlock(&data->mutex); 220 return 0; 221 } 222 223 val_reg &= ~(mask << shift); 224 val_reg |= val << shift; 225 tpa6130a2_i2c_write(reg, val_reg); 226 227 mutex_unlock(&data->mutex); 228 229 return 1; 230} 231 232/* 233 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going 234 * down in gain. 235 */ 236static const unsigned int tpa6130_tlv[] = { 237 TLV_DB_RANGE_HEAD(10), 238 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), 239 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), 240 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), 241 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), 242 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), 243 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), 244 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), 245 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), 246 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), 247 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0), 248}; 249 250static const struct snd_kcontrol_new tpa6130a2_controls[] = { 251 SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume", 252 TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, 253 tpa6130a2_get_volsw, tpa6130a2_put_volsw, 254 tpa6130_tlv), 255}; 256 257static const unsigned int tpa6140_tlv[] = { 258 TLV_DB_RANGE_HEAD(3), 259 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), 260 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), 261 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0), 262}; 263 264static const struct snd_kcontrol_new tpa6140a2_controls[] = { 265 SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume", 266 TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, 267 tpa6130a2_get_volsw, tpa6130a2_put_volsw, 268 tpa6140_tlv), 269}; 270 271/* 272 * Enable or disable channel (left or right) 273 * The bit number for mute and amplifier are the same per channel: 274 * bit 6: Right channel 275 * bit 7: Left channel 276 * in both registers. 277 */ 278static void tpa6130a2_channel_enable(u8 channel, int enable) 279{ 280 u8 val; 281 282 if (enable) { 283 /* Enable channel */ 284 /* Enable amplifier */ 285 val = tpa6130a2_read(TPA6130A2_REG_CONTROL); 286 val |= channel; 287 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); 288 289 /* Unmute channel */ 290 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); 291 val &= ~channel; 292 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); 293 } else { 294 /* Disable channel */ 295 /* Mute channel */ 296 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); 297 val |= channel; 298 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); 299 300 /* Disable amplifier */ 301 val = tpa6130a2_read(TPA6130A2_REG_CONTROL); 302 val &= ~channel; 303 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); 304 } 305} 306 307static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w, 308 struct snd_kcontrol *kcontrol, int event) 309{ 310 switch (event) { 311 case SND_SOC_DAPM_POST_PMU: 312 tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1); 313 break; 314 case SND_SOC_DAPM_POST_PMD: 315 tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0); 316 break; 317 } 318 return 0; 319} 320 321static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w, 322 struct snd_kcontrol *kcontrol, int event) 323{ 324 switch (event) { 325 case SND_SOC_DAPM_POST_PMU: 326 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1); 327 break; 328 case SND_SOC_DAPM_POST_PMD: 329 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0); 330 break; 331 } 332 return 0; 333} 334 335static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w, 336 struct snd_kcontrol *kcontrol, int event) 337{ 338 int ret = 0; 339 340 switch (event) { 341 case SND_SOC_DAPM_POST_PMU: 342 ret = tpa6130a2_power(1); 343 break; 344 case SND_SOC_DAPM_POST_PMD: 345 ret = tpa6130a2_power(0); 346 break; 347 } 348 return ret; 349} 350 351static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = { 352 SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM, 353 0, 0, NULL, 0, tpa6130a2_left_event, 354 SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), 355 SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM, 356 0, 0, NULL, 0, tpa6130a2_right_event, 357 SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), 358 SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM, 359 0, 0, tpa6130a2_supply_event, 360 SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), 361 /* Outputs */ 362 SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"), 363 SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"), 364}; 365 366static const struct snd_soc_dapm_route audio_map[] = { 367 {"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"}, 368 {"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"}, 369 370 {"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"}, 371 {"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"}, 372}; 373 374int tpa6130a2_add_controls(struct snd_soc_codec *codec) 375{ 376 struct tpa6130a2_data *data; 377 378 BUG_ON(tpa6130a2_client == NULL); 379 data = i2c_get_clientdata(tpa6130a2_client); 380 381 snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets, 382 ARRAY_SIZE(tpa6130a2_dapm_widgets)); 383 384 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 385 386 if (data->id == TPA6140A2) 387 return snd_soc_add_controls(codec, tpa6140a2_controls, 388 ARRAY_SIZE(tpa6140a2_controls)); 389 else 390 return snd_soc_add_controls(codec, tpa6130a2_controls, 391 ARRAY_SIZE(tpa6130a2_controls)); 392 393} 394EXPORT_SYMBOL_GPL(tpa6130a2_add_controls); 395 396static int __devinit tpa6130a2_probe(struct i2c_client *client, 397 const struct i2c_device_id *id) 398{ 399 struct device *dev; 400 struct tpa6130a2_data *data; 401 struct tpa6130a2_platform_data *pdata; 402 const char *regulator; 403 int ret; 404 405 dev = &client->dev; 406 407 if (client->dev.platform_data == NULL) { 408 dev_err(dev, "Platform data not set\n"); 409 dump_stack(); 410 return -ENODEV; 411 } 412 413 data = kzalloc(sizeof(*data), GFP_KERNEL); 414 if (data == NULL) { 415 dev_err(dev, "Can not allocate memory\n"); 416 return -ENOMEM; 417 } 418 419 tpa6130a2_client = client; 420 421 i2c_set_clientdata(tpa6130a2_client, data); 422 423 pdata = client->dev.platform_data; 424 data->power_gpio = pdata->power_gpio; 425 data->id = pdata->id; 426 427 mutex_init(&data->mutex); 428 429 /* Set default register values */ 430 data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; 431 data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | 432 TPA6130A2_MUTE_L; 433 434 if (data->power_gpio >= 0) { 435 ret = gpio_request(data->power_gpio, "tpa6130a2 enable"); 436 if (ret < 0) { 437 dev_err(dev, "Failed to request power GPIO (%d)\n", 438 data->power_gpio); 439 goto err_gpio; 440 } 441 gpio_direction_output(data->power_gpio, 0); 442 } 443 444 switch (data->id) { 445 default: 446 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", 447 pdata->id); 448 case TPA6130A2: 449 regulator = "Vdd"; 450 break; 451 case TPA6140A2: 452 regulator = "AVdd"; 453 break; 454 } 455 456 data->supply = regulator_get(dev, regulator); 457 if (IS_ERR(data->supply)) { 458 ret = PTR_ERR(data->supply); 459 dev_err(dev, "Failed to request supply: %d\n", ret); 460 goto err_regulator; 461 } 462 463 ret = tpa6130a2_power(1); 464 if (ret != 0) 465 goto err_power; 466 467 468 /* Read version */ 469 ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & 470 TPA6130A2_VERSION_MASK; 471 if ((ret != 1) && (ret != 2)) 472 dev_warn(dev, "UNTESTED version detected (%d)\n", ret); 473 474 /* Disable the chip */ 475 ret = tpa6130a2_power(0); 476 if (ret != 0) 477 goto err_power; 478 479 return 0; 480 481err_power: 482 regulator_put(data->supply); 483err_regulator: 484 if (data->power_gpio >= 0) 485 gpio_free(data->power_gpio); 486err_gpio: 487 kfree(data); 488 i2c_set_clientdata(tpa6130a2_client, NULL); 489 tpa6130a2_client = NULL; 490 491 return ret; 492} 493 494static int __devexit tpa6130a2_remove(struct i2c_client *client) 495{ 496 struct tpa6130a2_data *data = i2c_get_clientdata(client); 497 498 tpa6130a2_power(0); 499 500 if (data->power_gpio >= 0) 501 gpio_free(data->power_gpio); 502 503 regulator_put(data->supply); 504 505 kfree(data); 506 tpa6130a2_client = NULL; 507 508 return 0; 509} 510 511static const struct i2c_device_id tpa6130a2_id[] = { 512 { "tpa6130a2", 0 }, 513 { } 514}; 515MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); 516 517static struct i2c_driver tpa6130a2_i2c_driver = { 518 .driver = { 519 .name = "tpa6130a2", 520 .owner = THIS_MODULE, 521 }, 522 .probe = tpa6130a2_probe, 523 .remove = __devexit_p(tpa6130a2_remove), 524 .id_table = tpa6130a2_id, 525}; 526 527static int __init tpa6130a2_init(void) 528{ 529 return i2c_add_driver(&tpa6130a2_i2c_driver); 530} 531 532static void __exit tpa6130a2_exit(void) 533{ 534 i2c_del_driver(&tpa6130a2_i2c_driver); 535} 536 537MODULE_AUTHOR("Peter Ujfalusi"); 538MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); 539MODULE_LICENSE("GPL"); 540 541module_init(tpa6130a2_init); 542module_exit(tpa6130a2_exit); 543