1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * cs35l32.c -- CS35L32 ALSA SoC audio driver 4 * 5 * Copyright 2014 CirrusLogic, Inc. 6 * 7 * Author: Brian Austin <brian.austin@cirrus.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/delay.h> 15 #include <linux/i2c.h> 16 #include <linux/gpio.h> 17 #include <linux/regmap.h> 18 #include <linux/slab.h> 19 #include <linux/platform_device.h> 20 #include <linux/regulator/consumer.h> 21 #include <linux/gpio/consumer.h> 22 #include <linux/of_device.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/soc.h> 27 #include <sound/soc-dapm.h> 28 #include <sound/initval.h> 29 #include <sound/tlv.h> 30 #include <dt-bindings/sound/cs35l32.h> 31 32 #include "cs35l32.h" 33 #include "cirrus_legacy.h" 34 35 #define CS35L32_NUM_SUPPLIES 2 36 static const char *const cs35l32_supply_names[CS35L32_NUM_SUPPLIES] = { 37 "VA", 38 "VP", 39 }; 40 41 struct cs35l32_private { 42 struct regmap *regmap; 43 struct snd_soc_component *component; 44 struct regulator_bulk_data supplies[CS35L32_NUM_SUPPLIES]; 45 struct cs35l32_platform_data pdata; 46 struct gpio_desc *reset_gpio; 47 }; 48 49 static const struct reg_default cs35l32_reg_defaults[] = { 50 51 { 0x06, 0x04 }, /* Power Ctl 1 */ 52 { 0x07, 0xE8 }, /* Power Ctl 2 */ 53 { 0x08, 0x40 }, /* Clock Ctl */ 54 { 0x09, 0x20 }, /* Low Battery Threshold */ 55 { 0x0A, 0x00 }, /* Voltage Monitor [RO] */ 56 { 0x0B, 0x40 }, /* Conv Peak Curr Protection CTL */ 57 { 0x0C, 0x07 }, /* IMON Scaling */ 58 { 0x0D, 0x03 }, /* Audio/LED Pwr Manager */ 59 { 0x0F, 0x20 }, /* Serial Port Control */ 60 { 0x10, 0x14 }, /* Class D Amp CTL */ 61 { 0x11, 0x00 }, /* Protection Release CTL */ 62 { 0x12, 0xFF }, /* Interrupt Mask 1 */ 63 { 0x13, 0xFF }, /* Interrupt Mask 2 */ 64 { 0x14, 0xFF }, /* Interrupt Mask 3 */ 65 { 0x19, 0x00 }, /* LED Flash Mode Current */ 66 { 0x1A, 0x00 }, /* LED Movie Mode Current */ 67 { 0x1B, 0x20 }, /* LED Flash Timer */ 68 { 0x1C, 0x00 }, /* LED Flash Inhibit Current */ 69 }; 70 71 static bool cs35l32_readable_register(struct device *dev, unsigned int reg) 72 { 73 switch (reg) { 74 case CS35L32_DEVID_AB ... CS35L32_AUDIO_LED_MNGR: 75 case CS35L32_ADSP_CTL ... CS35L32_FLASH_INHIBIT: 76 return true; 77 default: 78 return false; 79 } 80 } 81 82 static bool cs35l32_volatile_register(struct device *dev, unsigned int reg) 83 { 84 switch (reg) { 85 case CS35L32_DEVID_AB ... CS35L32_REV_ID: 86 case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS: 87 return true; 88 default: 89 return false; 90 } 91 } 92 93 static bool cs35l32_precious_register(struct device *dev, unsigned int reg) 94 { 95 switch (reg) { 96 case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS: 97 return true; 98 default: 99 return false; 100 } 101 } 102 103 static DECLARE_TLV_DB_SCALE(classd_ctl_tlv, 900, 300, 0); 104 105 static const struct snd_kcontrol_new imon_ctl = 106 SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 6, 1, 1); 107 108 static const struct snd_kcontrol_new vmon_ctl = 109 SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 7, 1, 1); 110 111 static const struct snd_kcontrol_new vpmon_ctl = 112 SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 5, 1, 1); 113 114 static const struct snd_kcontrol_new cs35l32_snd_controls[] = { 115 SOC_SINGLE_TLV("Speaker Volume", CS35L32_CLASSD_CTL, 116 3, 0x04, 1, classd_ctl_tlv), 117 SOC_SINGLE("Zero Cross Switch", CS35L32_CLASSD_CTL, 2, 1, 0), 118 SOC_SINGLE("Gain Manager Switch", CS35L32_AUDIO_LED_MNGR, 3, 1, 0), 119 }; 120 121 static const struct snd_soc_dapm_widget cs35l32_dapm_widgets[] = { 122 123 SND_SOC_DAPM_SUPPLY("BOOST", CS35L32_PWRCTL1, 2, 1, NULL, 0), 124 SND_SOC_DAPM_OUT_DRV("Speaker", CS35L32_PWRCTL1, 7, 1, NULL, 0), 125 126 SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L32_PWRCTL2, 3, 1), 127 128 SND_SOC_DAPM_INPUT("VP"), 129 SND_SOC_DAPM_INPUT("ISENSE"), 130 SND_SOC_DAPM_INPUT("VSENSE"), 131 132 SND_SOC_DAPM_SWITCH("VMON ADC", CS35L32_PWRCTL2, 7, 1, &vmon_ctl), 133 SND_SOC_DAPM_SWITCH("IMON ADC", CS35L32_PWRCTL2, 6, 1, &imon_ctl), 134 SND_SOC_DAPM_SWITCH("VPMON ADC", CS35L32_PWRCTL2, 5, 1, &vpmon_ctl), 135 }; 136 137 static const struct snd_soc_dapm_route cs35l32_audio_map[] = { 138 139 {"Speaker", NULL, "BOOST"}, 140 141 {"VMON ADC", NULL, "VSENSE"}, 142 {"IMON ADC", NULL, "ISENSE"}, 143 {"VPMON ADC", NULL, "VP"}, 144 145 {"SDOUT", "Switch", "VMON ADC"}, 146 {"SDOUT", "Switch", "IMON ADC"}, 147 {"SDOUT", "Switch", "VPMON ADC"}, 148 149 {"Capture", NULL, "SDOUT"}, 150 }; 151 152 static int cs35l32_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 153 { 154 struct snd_soc_component *component = codec_dai->component; 155 156 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 157 case SND_SOC_DAIFMT_CBM_CFM: 158 snd_soc_component_update_bits(component, CS35L32_ADSP_CTL, 159 CS35L32_ADSP_MASTER_MASK, 160 CS35L32_ADSP_MASTER_MASK); 161 break; 162 case SND_SOC_DAIFMT_CBS_CFS: 163 snd_soc_component_update_bits(component, CS35L32_ADSP_CTL, 164 CS35L32_ADSP_MASTER_MASK, 0); 165 break; 166 default: 167 return -EINVAL; 168 } 169 170 return 0; 171 } 172 173 static int cs35l32_set_tristate(struct snd_soc_dai *dai, int tristate) 174 { 175 struct snd_soc_component *component = dai->component; 176 177 return snd_soc_component_update_bits(component, CS35L32_PWRCTL2, 178 CS35L32_SDOUT_3ST, tristate << 3); 179 } 180 181 static const struct snd_soc_dai_ops cs35l32_ops = { 182 .set_fmt = cs35l32_set_dai_fmt, 183 .set_tristate = cs35l32_set_tristate, 184 }; 185 186 static struct snd_soc_dai_driver cs35l32_dai[] = { 187 { 188 .name = "cs35l32-monitor", 189 .id = 0, 190 .capture = { 191 .stream_name = "Capture", 192 .channels_min = 2, 193 .channels_max = 2, 194 .rates = CS35L32_RATES, 195 .formats = CS35L32_FORMATS, 196 }, 197 .ops = &cs35l32_ops, 198 .symmetric_rate = 1, 199 } 200 }; 201 202 static int cs35l32_component_set_sysclk(struct snd_soc_component *component, 203 int clk_id, int source, unsigned int freq, int dir) 204 { 205 unsigned int val; 206 207 switch (freq) { 208 case 6000000: 209 val = CS35L32_MCLK_RATIO; 210 break; 211 case 12000000: 212 val = CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO; 213 break; 214 case 6144000: 215 val = 0; 216 break; 217 case 12288000: 218 val = CS35L32_MCLK_DIV2_MASK; 219 break; 220 default: 221 return -EINVAL; 222 } 223 224 return snd_soc_component_update_bits(component, CS35L32_CLK_CTL, 225 CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO_MASK, val); 226 } 227 228 static const struct snd_soc_component_driver soc_component_dev_cs35l32 = { 229 .set_sysclk = cs35l32_component_set_sysclk, 230 .controls = cs35l32_snd_controls, 231 .num_controls = ARRAY_SIZE(cs35l32_snd_controls), 232 .dapm_widgets = cs35l32_dapm_widgets, 233 .num_dapm_widgets = ARRAY_SIZE(cs35l32_dapm_widgets), 234 .dapm_routes = cs35l32_audio_map, 235 .num_dapm_routes = ARRAY_SIZE(cs35l32_audio_map), 236 .idle_bias_on = 1, 237 .use_pmdown_time = 1, 238 .endianness = 1, 239 .non_legacy_dai_naming = 1, 240 }; 241 242 /* Current and threshold powerup sequence Pg37 in datasheet */ 243 static const struct reg_sequence cs35l32_monitor_patch[] = { 244 245 { 0x00, 0x99 }, 246 { 0x48, 0x17 }, 247 { 0x49, 0x56 }, 248 { 0x43, 0x01 }, 249 { 0x3B, 0x62 }, 250 { 0x3C, 0x80 }, 251 { 0x00, 0x00 }, 252 }; 253 254 static const struct regmap_config cs35l32_regmap = { 255 .reg_bits = 8, 256 .val_bits = 8, 257 258 .max_register = CS35L32_MAX_REGISTER, 259 .reg_defaults = cs35l32_reg_defaults, 260 .num_reg_defaults = ARRAY_SIZE(cs35l32_reg_defaults), 261 .volatile_reg = cs35l32_volatile_register, 262 .readable_reg = cs35l32_readable_register, 263 .precious_reg = cs35l32_precious_register, 264 .cache_type = REGCACHE_RBTREE, 265 266 .use_single_read = true, 267 .use_single_write = true, 268 }; 269 270 static int cs35l32_handle_of_data(struct i2c_client *i2c_client, 271 struct cs35l32_platform_data *pdata) 272 { 273 struct device_node *np = i2c_client->dev.of_node; 274 unsigned int val; 275 276 if (of_property_read_u32(np, "cirrus,sdout-share", &val) >= 0) 277 pdata->sdout_share = val; 278 279 if (of_property_read_u32(np, "cirrus,boost-manager", &val)) 280 val = -1u; 281 282 switch (val) { 283 case CS35L32_BOOST_MGR_AUTO: 284 case CS35L32_BOOST_MGR_AUTO_AUDIO: 285 case CS35L32_BOOST_MGR_BYPASS: 286 case CS35L32_BOOST_MGR_FIXED: 287 pdata->boost_mng = val; 288 break; 289 case -1u: 290 default: 291 dev_err(&i2c_client->dev, 292 "Wrong cirrus,boost-manager DT value %d\n", val); 293 pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS; 294 } 295 296 if (of_property_read_u32(np, "cirrus,sdout-datacfg", &val)) 297 val = -1u; 298 switch (val) { 299 case CS35L32_DATA_CFG_LR_VP: 300 case CS35L32_DATA_CFG_LR_STAT: 301 case CS35L32_DATA_CFG_LR: 302 case CS35L32_DATA_CFG_LR_VPSTAT: 303 pdata->sdout_datacfg = val; 304 break; 305 case -1u: 306 default: 307 dev_err(&i2c_client->dev, 308 "Wrong cirrus,sdout-datacfg DT value %d\n", val); 309 pdata->sdout_datacfg = CS35L32_DATA_CFG_LR; 310 } 311 312 if (of_property_read_u32(np, "cirrus,battery-threshold", &val)) 313 val = -1u; 314 switch (val) { 315 case CS35L32_BATT_THRESH_3_1V: 316 case CS35L32_BATT_THRESH_3_2V: 317 case CS35L32_BATT_THRESH_3_3V: 318 case CS35L32_BATT_THRESH_3_4V: 319 pdata->batt_thresh = val; 320 break; 321 case -1u: 322 default: 323 dev_err(&i2c_client->dev, 324 "Wrong cirrus,battery-threshold DT value %d\n", val); 325 pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V; 326 } 327 328 if (of_property_read_u32(np, "cirrus,battery-recovery", &val)) 329 val = -1u; 330 switch (val) { 331 case CS35L32_BATT_RECOV_3_1V: 332 case CS35L32_BATT_RECOV_3_2V: 333 case CS35L32_BATT_RECOV_3_3V: 334 case CS35L32_BATT_RECOV_3_4V: 335 case CS35L32_BATT_RECOV_3_5V: 336 case CS35L32_BATT_RECOV_3_6V: 337 pdata->batt_recov = val; 338 break; 339 case -1u: 340 default: 341 dev_err(&i2c_client->dev, 342 "Wrong cirrus,battery-recovery DT value %d\n", val); 343 pdata->batt_recov = CS35L32_BATT_RECOV_3_4V; 344 } 345 346 return 0; 347 } 348 349 static int cs35l32_i2c_probe(struct i2c_client *i2c_client) 350 { 351 struct cs35l32_private *cs35l32; 352 struct cs35l32_platform_data *pdata = 353 dev_get_platdata(&i2c_client->dev); 354 int ret, i, devid; 355 unsigned int reg; 356 357 cs35l32 = devm_kzalloc(&i2c_client->dev, sizeof(*cs35l32), GFP_KERNEL); 358 if (!cs35l32) 359 return -ENOMEM; 360 361 i2c_set_clientdata(i2c_client, cs35l32); 362 363 cs35l32->regmap = devm_regmap_init_i2c(i2c_client, &cs35l32_regmap); 364 if (IS_ERR(cs35l32->regmap)) { 365 ret = PTR_ERR(cs35l32->regmap); 366 dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret); 367 return ret; 368 } 369 370 if (pdata) { 371 cs35l32->pdata = *pdata; 372 } else { 373 pdata = devm_kzalloc(&i2c_client->dev, sizeof(*pdata), 374 GFP_KERNEL); 375 if (!pdata) 376 return -ENOMEM; 377 378 if (i2c_client->dev.of_node) { 379 ret = cs35l32_handle_of_data(i2c_client, 380 &cs35l32->pdata); 381 if (ret != 0) 382 return ret; 383 } 384 } 385 386 for (i = 0; i < ARRAY_SIZE(cs35l32->supplies); i++) 387 cs35l32->supplies[i].supply = cs35l32_supply_names[i]; 388 389 ret = devm_regulator_bulk_get(&i2c_client->dev, 390 ARRAY_SIZE(cs35l32->supplies), 391 cs35l32->supplies); 392 if (ret != 0) { 393 dev_err(&i2c_client->dev, 394 "Failed to request supplies: %d\n", ret); 395 return ret; 396 } 397 398 ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies), 399 cs35l32->supplies); 400 if (ret != 0) { 401 dev_err(&i2c_client->dev, 402 "Failed to enable supplies: %d\n", ret); 403 return ret; 404 } 405 406 /* Reset the Device */ 407 cs35l32->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev, 408 "reset", GPIOD_OUT_LOW); 409 if (IS_ERR(cs35l32->reset_gpio)) { 410 ret = PTR_ERR(cs35l32->reset_gpio); 411 goto err_supplies; 412 } 413 414 gpiod_set_value_cansleep(cs35l32->reset_gpio, 1); 415 416 /* initialize codec */ 417 devid = cirrus_read_device_id(cs35l32->regmap, CS35L32_DEVID_AB); 418 if (devid < 0) { 419 ret = devid; 420 dev_err(&i2c_client->dev, "Failed to read device ID: %d\n", ret); 421 goto err_disable; 422 } 423 424 if (devid != CS35L32_CHIP_ID) { 425 ret = -ENODEV; 426 dev_err(&i2c_client->dev, 427 "CS35L32 Device ID (%X). Expected %X\n", 428 devid, CS35L32_CHIP_ID); 429 goto err_disable; 430 } 431 432 ret = regmap_read(cs35l32->regmap, CS35L32_REV_ID, ®); 433 if (ret < 0) { 434 dev_err(&i2c_client->dev, "Get Revision ID failed\n"); 435 goto err_disable; 436 } 437 438 ret = regmap_register_patch(cs35l32->regmap, cs35l32_monitor_patch, 439 ARRAY_SIZE(cs35l32_monitor_patch)); 440 if (ret < 0) { 441 dev_err(&i2c_client->dev, "Failed to apply errata patch\n"); 442 goto err_disable; 443 } 444 445 dev_info(&i2c_client->dev, 446 "Cirrus Logic CS35L32, Revision: %02X\n", reg & 0xFF); 447 448 /* Setup VBOOST Management */ 449 if (cs35l32->pdata.boost_mng) 450 regmap_update_bits(cs35l32->regmap, CS35L32_AUDIO_LED_MNGR, 451 CS35L32_BOOST_MASK, 452 cs35l32->pdata.boost_mng); 453 454 /* Setup ADSP Format Config */ 455 if (cs35l32->pdata.sdout_share) 456 regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL, 457 CS35L32_ADSP_SHARE_MASK, 458 cs35l32->pdata.sdout_share << 3); 459 460 /* Setup ADSP Data Configuration */ 461 if (cs35l32->pdata.sdout_datacfg) 462 regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL, 463 CS35L32_ADSP_DATACFG_MASK, 464 cs35l32->pdata.sdout_datacfg << 4); 465 466 /* Setup Low Battery Recovery */ 467 if (cs35l32->pdata.batt_recov) 468 regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD, 469 CS35L32_BATT_REC_MASK, 470 cs35l32->pdata.batt_recov << 1); 471 472 /* Setup Low Battery Threshold */ 473 if (cs35l32->pdata.batt_thresh) 474 regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD, 475 CS35L32_BATT_THRESH_MASK, 476 cs35l32->pdata.batt_thresh << 4); 477 478 /* Power down the AMP */ 479 regmap_update_bits(cs35l32->regmap, CS35L32_PWRCTL1, CS35L32_PDN_AMP, 480 CS35L32_PDN_AMP); 481 482 /* Clear MCLK Error Bit since we don't have the clock yet */ 483 regmap_read(cs35l32->regmap, CS35L32_INT_STATUS_1, ®); 484 485 ret = devm_snd_soc_register_component(&i2c_client->dev, 486 &soc_component_dev_cs35l32, cs35l32_dai, 487 ARRAY_SIZE(cs35l32_dai)); 488 if (ret < 0) 489 goto err_disable; 490 491 return 0; 492 493 err_disable: 494 gpiod_set_value_cansleep(cs35l32->reset_gpio, 0); 495 err_supplies: 496 regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies), 497 cs35l32->supplies); 498 return ret; 499 } 500 501 static int cs35l32_i2c_remove(struct i2c_client *i2c_client) 502 { 503 struct cs35l32_private *cs35l32 = i2c_get_clientdata(i2c_client); 504 505 /* Hold down reset */ 506 gpiod_set_value_cansleep(cs35l32->reset_gpio, 0); 507 508 return 0; 509 } 510 511 #ifdef CONFIG_PM 512 static int cs35l32_runtime_suspend(struct device *dev) 513 { 514 struct cs35l32_private *cs35l32 = dev_get_drvdata(dev); 515 516 regcache_cache_only(cs35l32->regmap, true); 517 regcache_mark_dirty(cs35l32->regmap); 518 519 /* Hold down reset */ 520 gpiod_set_value_cansleep(cs35l32->reset_gpio, 0); 521 522 /* remove power */ 523 regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies), 524 cs35l32->supplies); 525 526 return 0; 527 } 528 529 static int cs35l32_runtime_resume(struct device *dev) 530 { 531 struct cs35l32_private *cs35l32 = dev_get_drvdata(dev); 532 int ret; 533 534 /* Enable power */ 535 ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies), 536 cs35l32->supplies); 537 if (ret != 0) { 538 dev_err(dev, "Failed to enable supplies: %d\n", 539 ret); 540 return ret; 541 } 542 543 gpiod_set_value_cansleep(cs35l32->reset_gpio, 1); 544 545 regcache_cache_only(cs35l32->regmap, false); 546 regcache_sync(cs35l32->regmap); 547 548 return 0; 549 } 550 #endif 551 552 static const struct dev_pm_ops cs35l32_runtime_pm = { 553 SET_RUNTIME_PM_OPS(cs35l32_runtime_suspend, cs35l32_runtime_resume, 554 NULL) 555 }; 556 557 static const struct of_device_id cs35l32_of_match[] = { 558 { .compatible = "cirrus,cs35l32", }, 559 {}, 560 }; 561 MODULE_DEVICE_TABLE(of, cs35l32_of_match); 562 563 564 static const struct i2c_device_id cs35l32_id[] = { 565 {"cs35l32", 0}, 566 {} 567 }; 568 569 MODULE_DEVICE_TABLE(i2c, cs35l32_id); 570 571 static struct i2c_driver cs35l32_i2c_driver = { 572 .driver = { 573 .name = "cs35l32", 574 .pm = &cs35l32_runtime_pm, 575 .of_match_table = cs35l32_of_match, 576 }, 577 .id_table = cs35l32_id, 578 .probe_new = cs35l32_i2c_probe, 579 .remove = cs35l32_i2c_remove, 580 }; 581 582 module_i2c_driver(cs35l32_i2c_driver); 583 584 MODULE_DESCRIPTION("ASoC CS35L32 driver"); 585 MODULE_AUTHOR("Brian Austin, Cirrus Logic Inc, <brian.austin@cirrus.com>"); 586 MODULE_LICENSE("GPL"); 587