1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // rt711-sdw.c -- rt711 ALSA SoC audio driver 4 // 5 // Copyright(c) 2019 Realtek Semiconductor Corp. 6 // 7 // 8 9 #include <linux/delay.h> 10 #include <linux/device.h> 11 #include <linux/mod_devicetable.h> 12 #include <linux/soundwire/sdw.h> 13 #include <linux/soundwire/sdw_type.h> 14 #include <linux/soundwire/sdw_registers.h> 15 #include <linux/module.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/regmap.h> 18 #include <sound/soc.h> 19 #include "rt711.h" 20 #include "rt711-sdw.h" 21 22 static bool rt711_readable_register(struct device *dev, unsigned int reg) 23 { 24 switch (reg) { 25 case 0x00e0: 26 case 0x00f0: 27 case 0x2012 ... 0x2016: 28 case 0x201a ... 0x2027: 29 case 0x2029 ... 0x202a: 30 case 0x202d ... 0x2034: 31 case 0x2201 ... 0x2204: 32 case 0x2206 ... 0x2212: 33 case 0x2220 ... 0x2223: 34 case 0x2230 ... 0x2239: 35 case 0x2f01 ... 0x2f0f: 36 case 0x3000 ... 0x3fff: 37 case 0x7000 ... 0x7fff: 38 case 0x8300 ... 0x83ff: 39 case 0x9c00 ... 0x9cff: 40 case 0xb900 ... 0xb9ff: 41 case 0x752009: 42 case 0x752011: 43 case 0x75201a: 44 case 0x752045: 45 case 0x752046: 46 case 0x752048: 47 case 0x75204a: 48 case 0x75206b: 49 case 0x75206f: 50 case 0x752080: 51 case 0x752081: 52 case 0x752091: 53 case 0x755800: 54 return true; 55 default: 56 return false; 57 } 58 } 59 60 static bool rt711_volatile_register(struct device *dev, unsigned int reg) 61 { 62 switch (reg) { 63 case 0x2016: 64 case 0x201b: 65 case 0x201c: 66 case 0x201d: 67 case 0x201f: 68 case 0x2021: 69 case 0x2023: 70 case 0x2230: 71 case 0x2012 ... 0x2015: /* HD-A read */ 72 case 0x202d ... 0x202f: /* BRA */ 73 case 0x2201 ... 0x2212: /* i2c debug */ 74 case 0x2220 ... 0x2223: /* decoded HD-A */ 75 case 0x9c00 ... 0x9cff: 76 case 0xb900 ... 0xb9ff: 77 case 0xff01: 78 case 0x75201a: 79 case 0x752046: 80 case 0x752080: 81 case 0x752081: 82 case 0x755800: 83 return true; 84 default: 85 return false; 86 } 87 } 88 89 static int rt711_sdw_read(void *context, unsigned int reg, unsigned int *val) 90 { 91 struct device *dev = context; 92 struct rt711_priv *rt711 = dev_get_drvdata(dev); 93 unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0; 94 unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2; 95 unsigned int is_hda_reg = 1, is_index_reg = 0; 96 int ret; 97 98 if (reg > 0xffff) 99 is_index_reg = 1; 100 101 mask = reg & 0xf000; 102 103 if (is_index_reg) { /* index registers */ 104 val2 = reg & 0xff; 105 reg = reg >> 8; 106 nid = reg & 0xff; 107 ret = regmap_write(rt711->sdw_regmap, reg, 0); 108 if (ret < 0) 109 return ret; 110 reg2 = reg + 0x1000; 111 reg2 |= 0x80; 112 ret = regmap_write(rt711->sdw_regmap, reg2, val2); 113 if (ret < 0) 114 return ret; 115 116 reg3 = RT711_PRIV_DATA_R_H | nid; 117 ret = regmap_write(rt711->sdw_regmap, 118 reg3, ((*val >> 8) & 0xff)); 119 if (ret < 0) 120 return ret; 121 reg4 = reg3 + 0x1000; 122 reg4 |= 0x80; 123 ret = regmap_write(rt711->sdw_regmap, reg4, (*val & 0xff)); 124 if (ret < 0) 125 return ret; 126 } else if (mask == 0x3000) { 127 reg += 0x8000; 128 ret = regmap_write(rt711->sdw_regmap, reg, *val); 129 if (ret < 0) 130 return ret; 131 } else if (mask == 0x7000) { 132 reg += 0x2000; 133 reg |= 0x800; 134 ret = regmap_write(rt711->sdw_regmap, 135 reg, ((*val >> 8) & 0xff)); 136 if (ret < 0) 137 return ret; 138 reg2 = reg + 0x1000; 139 reg2 |= 0x80; 140 ret = regmap_write(rt711->sdw_regmap, reg2, (*val & 0xff)); 141 if (ret < 0) 142 return ret; 143 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */ 144 reg2 = reg - 0x1000; 145 reg2 &= ~0x80; 146 ret = regmap_write(rt711->sdw_regmap, 147 reg2, ((*val >> 8) & 0xff)); 148 if (ret < 0) 149 return ret; 150 ret = regmap_write(rt711->sdw_regmap, reg, (*val & 0xff)); 151 if (ret < 0) 152 return ret; 153 } else if (mask == 0x9000) { 154 ret = regmap_write(rt711->sdw_regmap, 155 reg, ((*val >> 8) & 0xff)); 156 if (ret < 0) 157 return ret; 158 reg2 = reg + 0x1000; 159 reg2 |= 0x80; 160 ret = regmap_write(rt711->sdw_regmap, reg2, (*val & 0xff)); 161 if (ret < 0) 162 return ret; 163 } else if (mask == 0xb000) { 164 ret = regmap_write(rt711->sdw_regmap, reg, *val); 165 if (ret < 0) 166 return ret; 167 } else { 168 ret = regmap_read(rt711->sdw_regmap, reg, val); 169 if (ret < 0) 170 return ret; 171 is_hda_reg = 0; 172 } 173 174 if (is_hda_reg || is_index_reg) { 175 sdw_data_3 = 0; 176 sdw_data_2 = 0; 177 sdw_data_1 = 0; 178 sdw_data_0 = 0; 179 ret = regmap_read(rt711->sdw_regmap, 180 RT711_READ_HDA_3, &sdw_data_3); 181 if (ret < 0) 182 return ret; 183 ret = regmap_read(rt711->sdw_regmap, 184 RT711_READ_HDA_2, &sdw_data_2); 185 if (ret < 0) 186 return ret; 187 ret = regmap_read(rt711->sdw_regmap, 188 RT711_READ_HDA_1, &sdw_data_1); 189 if (ret < 0) 190 return ret; 191 ret = regmap_read(rt711->sdw_regmap, 192 RT711_READ_HDA_0, &sdw_data_0); 193 if (ret < 0) 194 return ret; 195 *val = ((sdw_data_3 & 0xff) << 24) | 196 ((sdw_data_2 & 0xff) << 16) | 197 ((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff); 198 } 199 200 if (is_hda_reg == 0) 201 dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val); 202 else if (is_index_reg) 203 dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n", 204 __func__, reg, reg2, reg3, reg4, *val); 205 else 206 dev_dbg(dev, "[%s] %04x %04x => %08x\n", 207 __func__, reg, reg2, *val); 208 209 return 0; 210 } 211 212 static int rt711_sdw_write(void *context, unsigned int reg, unsigned int val) 213 { 214 struct device *dev = context; 215 struct rt711_priv *rt711 = dev_get_drvdata(dev); 216 unsigned int reg2 = 0, reg3, reg4, nid, mask, val2; 217 unsigned int is_index_reg = 0; 218 int ret; 219 220 if (reg > 0xffff) 221 is_index_reg = 1; 222 223 mask = reg & 0xf000; 224 225 if (is_index_reg) { /* index registers */ 226 val2 = reg & 0xff; 227 reg = reg >> 8; 228 nid = reg & 0xff; 229 ret = regmap_write(rt711->sdw_regmap, reg, 0); 230 if (ret < 0) 231 return ret; 232 reg2 = reg + 0x1000; 233 reg2 |= 0x80; 234 ret = regmap_write(rt711->sdw_regmap, reg2, val2); 235 if (ret < 0) 236 return ret; 237 238 reg3 = RT711_PRIV_DATA_W_H | nid; 239 ret = regmap_write(rt711->sdw_regmap, 240 reg3, ((val >> 8) & 0xff)); 241 if (ret < 0) 242 return ret; 243 reg4 = reg3 + 0x1000; 244 reg4 |= 0x80; 245 ret = regmap_write(rt711->sdw_regmap, reg4, (val & 0xff)); 246 if (ret < 0) 247 return ret; 248 is_index_reg = 1; 249 } else if (reg < 0x4fff) { 250 ret = regmap_write(rt711->sdw_regmap, reg, val); 251 if (ret < 0) 252 return ret; 253 } else if (reg == RT711_FUNC_RESET) { 254 ret = regmap_write(rt711->sdw_regmap, reg, val); 255 if (ret < 0) 256 return ret; 257 } else if (mask == 0x7000) { 258 ret = regmap_write(rt711->sdw_regmap, 259 reg, ((val >> 8) & 0xff)); 260 if (ret < 0) 261 return ret; 262 reg2 = reg + 0x1000; 263 reg2 |= 0x80; 264 ret = regmap_write(rt711->sdw_regmap, reg2, (val & 0xff)); 265 if (ret < 0) 266 return ret; 267 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */ 268 reg2 = reg - 0x1000; 269 reg2 &= ~0x80; 270 ret = regmap_write(rt711->sdw_regmap, 271 reg2, ((val >> 8) & 0xff)); 272 if (ret < 0) 273 return ret; 274 ret = regmap_write(rt711->sdw_regmap, reg, (val & 0xff)); 275 if (ret < 0) 276 return ret; 277 } 278 279 if (reg2 == 0) 280 dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val); 281 else if (is_index_reg) 282 dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n", 283 __func__, reg, reg2, reg3, reg4, val2, val); 284 else 285 dev_dbg(dev, "[%s] %04x %04x <= %04x\n", 286 __func__, reg, reg2, val); 287 288 return 0; 289 } 290 291 static const struct regmap_config rt711_regmap = { 292 .reg_bits = 24, 293 .val_bits = 32, 294 .readable_reg = rt711_readable_register, 295 .volatile_reg = rt711_volatile_register, 296 .max_register = 0x755800, 297 .reg_defaults = rt711_reg_defaults, 298 .num_reg_defaults = ARRAY_SIZE(rt711_reg_defaults), 299 .cache_type = REGCACHE_RBTREE, 300 .use_single_read = true, 301 .use_single_write = true, 302 .reg_read = rt711_sdw_read, 303 .reg_write = rt711_sdw_write, 304 }; 305 306 static const struct regmap_config rt711_sdw_regmap = { 307 .name = "sdw", 308 .reg_bits = 32, 309 .val_bits = 8, 310 .readable_reg = rt711_readable_register, 311 .max_register = 0xff01, 312 .cache_type = REGCACHE_NONE, 313 .use_single_read = true, 314 .use_single_write = true, 315 }; 316 317 static int rt711_update_status(struct sdw_slave *slave, 318 enum sdw_slave_status status) 319 { 320 struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev); 321 322 /* Update the status */ 323 rt711->status = status; 324 325 if (status == SDW_SLAVE_UNATTACHED) 326 rt711->hw_init = false; 327 328 /* 329 * Perform initialization only if slave status is present and 330 * hw_init flag is false 331 */ 332 if (rt711->hw_init || rt711->status != SDW_SLAVE_ATTACHED) 333 return 0; 334 335 /* perform I/O transfers required for Slave initialization */ 336 return rt711_io_init(&slave->dev, slave); 337 } 338 339 static int rt711_read_prop(struct sdw_slave *slave) 340 { 341 struct sdw_slave_prop *prop = &slave->prop; 342 int nval; 343 int i, j; 344 u32 bit; 345 unsigned long addr; 346 struct sdw_dpn_prop *dpn; 347 348 prop->scp_int1_mask = SDW_SCP_INT1_IMPL_DEF | SDW_SCP_INT1_BUS_CLASH | 349 SDW_SCP_INT1_PARITY; 350 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY; 351 352 prop->paging_support = false; 353 354 /* first we need to allocate memory for set bits in port lists */ 355 prop->source_ports = 0x14; /* BITMAP: 00010100 */ 356 prop->sink_ports = 0x8; /* BITMAP: 00001000 */ 357 358 nval = hweight32(prop->source_ports); 359 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval, 360 sizeof(*prop->src_dpn_prop), 361 GFP_KERNEL); 362 if (!prop->src_dpn_prop) 363 return -ENOMEM; 364 365 i = 0; 366 dpn = prop->src_dpn_prop; 367 addr = prop->source_ports; 368 for_each_set_bit(bit, &addr, 32) { 369 dpn[i].num = bit; 370 dpn[i].type = SDW_DPN_FULL; 371 dpn[i].simple_ch_prep_sm = true; 372 dpn[i].ch_prep_timeout = 10; 373 i++; 374 } 375 376 /* do this again for sink now */ 377 nval = hweight32(prop->sink_ports); 378 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval, 379 sizeof(*prop->sink_dpn_prop), 380 GFP_KERNEL); 381 if (!prop->sink_dpn_prop) 382 return -ENOMEM; 383 384 j = 0; 385 dpn = prop->sink_dpn_prop; 386 addr = prop->sink_ports; 387 for_each_set_bit(bit, &addr, 32) { 388 dpn[j].num = bit; 389 dpn[j].type = SDW_DPN_FULL; 390 dpn[j].simple_ch_prep_sm = true; 391 dpn[j].ch_prep_timeout = 10; 392 j++; 393 } 394 395 /* set the timeout values */ 396 prop->clk_stop_timeout = 20; 397 398 /* wake-up event */ 399 prop->wake_capable = 1; 400 401 return 0; 402 } 403 404 static int rt711_bus_config(struct sdw_slave *slave, 405 struct sdw_bus_params *params) 406 { 407 struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev); 408 int ret; 409 410 memcpy(&rt711->params, params, sizeof(*params)); 411 412 ret = rt711_clock_config(&slave->dev); 413 if (ret < 0) 414 dev_err(&slave->dev, "Invalid clk config"); 415 416 return ret; 417 } 418 419 static int rt711_interrupt_callback(struct sdw_slave *slave, 420 struct sdw_slave_intr_status *status) 421 { 422 struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev); 423 424 dev_dbg(&slave->dev, 425 "%s control_port_stat=%x", __func__, status->control_port); 426 427 mutex_lock(&rt711->disable_irq_lock); 428 if (status->control_port & 0x4 && !rt711->disable_irq) { 429 mod_delayed_work(system_power_efficient_wq, 430 &rt711->jack_detect_work, msecs_to_jiffies(250)); 431 } 432 mutex_unlock(&rt711->disable_irq_lock); 433 434 return 0; 435 } 436 437 static const struct sdw_slave_ops rt711_slave_ops = { 438 .read_prop = rt711_read_prop, 439 .interrupt_callback = rt711_interrupt_callback, 440 .update_status = rt711_update_status, 441 .bus_config = rt711_bus_config, 442 }; 443 444 static int rt711_sdw_probe(struct sdw_slave *slave, 445 const struct sdw_device_id *id) 446 { 447 struct regmap *sdw_regmap, *regmap; 448 449 /* Regmap Initialization */ 450 sdw_regmap = devm_regmap_init_sdw(slave, &rt711_sdw_regmap); 451 if (IS_ERR(sdw_regmap)) 452 return PTR_ERR(sdw_regmap); 453 454 regmap = devm_regmap_init(&slave->dev, NULL, 455 &slave->dev, &rt711_regmap); 456 if (IS_ERR(regmap)) 457 return PTR_ERR(regmap); 458 459 rt711_init(&slave->dev, sdw_regmap, regmap, slave); 460 461 return 0; 462 } 463 464 static int rt711_sdw_remove(struct sdw_slave *slave) 465 { 466 struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev); 467 468 if (rt711->hw_init) { 469 cancel_delayed_work_sync(&rt711->jack_detect_work); 470 cancel_delayed_work_sync(&rt711->jack_btn_check_work); 471 cancel_work_sync(&rt711->calibration_work); 472 } 473 474 if (rt711->first_hw_init) 475 pm_runtime_disable(&slave->dev); 476 477 mutex_destroy(&rt711->calibrate_mutex); 478 mutex_destroy(&rt711->disable_irq_lock); 479 480 return 0; 481 } 482 483 static const struct sdw_device_id rt711_id[] = { 484 SDW_SLAVE_ENTRY_EXT(0x025d, 0x711, 0x2, 0, 0), 485 {}, 486 }; 487 MODULE_DEVICE_TABLE(sdw, rt711_id); 488 489 static int __maybe_unused rt711_dev_suspend(struct device *dev) 490 { 491 struct rt711_priv *rt711 = dev_get_drvdata(dev); 492 493 if (!rt711->hw_init) 494 return 0; 495 496 cancel_delayed_work_sync(&rt711->jack_detect_work); 497 cancel_delayed_work_sync(&rt711->jack_btn_check_work); 498 cancel_work_sync(&rt711->calibration_work); 499 500 regcache_cache_only(rt711->regmap, true); 501 502 return 0; 503 } 504 505 static int __maybe_unused rt711_dev_system_suspend(struct device *dev) 506 { 507 struct rt711_priv *rt711 = dev_get_drvdata(dev); 508 struct sdw_slave *slave = dev_to_sdw_dev(dev); 509 int ret; 510 511 if (!rt711->hw_init) 512 return 0; 513 514 /* 515 * prevent new interrupts from being handled after the 516 * deferred work completes and before the parent disables 517 * interrupts on the link 518 */ 519 mutex_lock(&rt711->disable_irq_lock); 520 rt711->disable_irq = true; 521 ret = sdw_update_no_pm(slave, SDW_SCP_INTMASK1, 522 SDW_SCP_INT1_IMPL_DEF, 0); 523 mutex_unlock(&rt711->disable_irq_lock); 524 525 if (ret < 0) { 526 /* log but don't prevent suspend from happening */ 527 dev_dbg(&slave->dev, "%s: could not disable imp-def interrupts\n:", __func__); 528 } 529 530 return rt711_dev_suspend(dev); 531 } 532 533 #define RT711_PROBE_TIMEOUT 5000 534 535 static int __maybe_unused rt711_dev_resume(struct device *dev) 536 { 537 struct sdw_slave *slave = dev_to_sdw_dev(dev); 538 struct rt711_priv *rt711 = dev_get_drvdata(dev); 539 unsigned long time; 540 541 if (!rt711->first_hw_init) 542 return 0; 543 544 if (!slave->unattach_request) 545 goto regmap_sync; 546 547 time = wait_for_completion_timeout(&slave->initialization_complete, 548 msecs_to_jiffies(RT711_PROBE_TIMEOUT)); 549 if (!time) { 550 dev_err(&slave->dev, "Initialization not complete, timed out\n"); 551 return -ETIMEDOUT; 552 } 553 554 regmap_sync: 555 slave->unattach_request = 0; 556 regcache_cache_only(rt711->regmap, false); 557 regcache_sync_region(rt711->regmap, 0x3000, 0x8fff); 558 regcache_sync_region(rt711->regmap, 0x752009, 0x752091); 559 560 return 0; 561 } 562 563 static const struct dev_pm_ops rt711_pm = { 564 SET_SYSTEM_SLEEP_PM_OPS(rt711_dev_system_suspend, rt711_dev_resume) 565 SET_RUNTIME_PM_OPS(rt711_dev_suspend, rt711_dev_resume, NULL) 566 }; 567 568 static struct sdw_driver rt711_sdw_driver = { 569 .driver = { 570 .name = "rt711", 571 .owner = THIS_MODULE, 572 .pm = &rt711_pm, 573 }, 574 .probe = rt711_sdw_probe, 575 .remove = rt711_sdw_remove, 576 .ops = &rt711_slave_ops, 577 .id_table = rt711_id, 578 }; 579 module_sdw_driver(rt711_sdw_driver); 580 581 MODULE_DESCRIPTION("ASoC RT711 SDW driver"); 582 MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>"); 583 MODULE_LICENSE("GPL"); 584