1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // rt700-sdw.c -- rt700 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 "rt700.h" 20 #include "rt700-sdw.h" 21 22 static bool rt700_readable_register(struct device *dev, unsigned int reg) 23 { 24 switch (reg) { 25 case 0x00e0: 26 case 0x00f0: 27 case 0x2000 ... 0x200e: 28 case 0x2012 ... 0x2016: 29 case 0x201a ... 0x2027: 30 case 0x2029 ... 0x202a: 31 case 0x202d ... 0x2034: 32 case 0x2200 ... 0x2204: 33 case 0x2206 ... 0x2212: 34 case 0x2220 ... 0x2223: 35 case 0x2230 ... 0x2231: 36 case 0x3000 ... 0x3fff: 37 case 0x7000 ... 0x7fff: 38 case 0x8300 ... 0x83ff: 39 case 0x9c00 ... 0x9cff: 40 case 0xb900 ... 0xb9ff: 41 case 0x75201a: 42 case 0x752045: 43 case 0x752046: 44 case 0x752048: 45 case 0x75204a: 46 case 0x75206b: 47 case 0x752080: 48 case 0x752081: 49 return true; 50 default: 51 return false; 52 } 53 } 54 55 static bool rt700_volatile_register(struct device *dev, unsigned int reg) 56 { 57 switch (reg) { 58 case 0x2009: 59 case 0x2016: 60 case 0x201b: 61 case 0x201c: 62 case 0x201d: 63 case 0x201f: 64 case 0x2021: 65 case 0x2023: 66 case 0x2230: 67 case 0x200b ... 0x200e: /* i2c read */ 68 case 0x2012 ... 0x2015: /* HD-A read */ 69 case 0x202d ... 0x202f: /* BRA */ 70 case 0x2201 ... 0x2212: /* i2c debug */ 71 case 0x2220 ... 0x2223: /* decoded HD-A */ 72 case 0x9c00 ... 0x9cff: 73 case 0xb900 ... 0xb9ff: 74 case 0xff01: 75 case 0x75201a: 76 case 0x752046: 77 case 0x752080: 78 case 0x752081: 79 return true; 80 default: 81 return false; 82 } 83 } 84 85 static int rt700_sdw_read(void *context, unsigned int reg, unsigned int *val) 86 { 87 struct device *dev = context; 88 struct rt700_priv *rt700 = dev_get_drvdata(dev); 89 unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0; 90 unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2; 91 unsigned int is_hda_reg = 1, is_index_reg = 0; 92 int ret; 93 94 if (reg > 0xffff) 95 is_index_reg = 1; 96 97 mask = reg & 0xf000; 98 99 if (is_index_reg) { /* index registers */ 100 val2 = reg & 0xff; 101 reg = reg >> 8; 102 nid = reg & 0xff; 103 ret = regmap_write(rt700->sdw_regmap, reg, 0); 104 if (ret < 0) 105 return ret; 106 reg2 = reg + 0x1000; 107 reg2 |= 0x80; 108 ret = regmap_write(rt700->sdw_regmap, reg2, val2); 109 if (ret < 0) 110 return ret; 111 112 reg3 = RT700_PRIV_DATA_R_H | nid; 113 ret = regmap_write(rt700->sdw_regmap, 114 reg3, ((*val >> 8) & 0xff)); 115 if (ret < 0) 116 return ret; 117 reg4 = reg3 + 0x1000; 118 reg4 |= 0x80; 119 ret = regmap_write(rt700->sdw_regmap, reg4, (*val & 0xff)); 120 if (ret < 0) 121 return ret; 122 } else if (mask == 0x3000) { 123 reg += 0x8000; 124 ret = regmap_write(rt700->sdw_regmap, reg, *val); 125 if (ret < 0) 126 return ret; 127 } else if (mask == 0x7000) { 128 reg += 0x2000; 129 reg |= 0x800; 130 ret = regmap_write(rt700->sdw_regmap, 131 reg, ((*val >> 8) & 0xff)); 132 if (ret < 0) 133 return ret; 134 reg2 = reg + 0x1000; 135 reg2 |= 0x80; 136 ret = regmap_write(rt700->sdw_regmap, reg2, (*val & 0xff)); 137 if (ret < 0) 138 return ret; 139 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */ 140 reg2 = reg - 0x1000; 141 reg2 &= ~0x80; 142 ret = regmap_write(rt700->sdw_regmap, 143 reg2, ((*val >> 8) & 0xff)); 144 if (ret < 0) 145 return ret; 146 ret = regmap_write(rt700->sdw_regmap, reg, (*val & 0xff)); 147 if (ret < 0) 148 return ret; 149 } else if (mask == 0x9000) { 150 ret = regmap_write(rt700->sdw_regmap, 151 reg, ((*val >> 8) & 0xff)); 152 if (ret < 0) 153 return ret; 154 reg2 = reg + 0x1000; 155 reg2 |= 0x80; 156 ret = regmap_write(rt700->sdw_regmap, reg2, (*val & 0xff)); 157 if (ret < 0) 158 return ret; 159 } else if (mask == 0xb000) { 160 ret = regmap_write(rt700->sdw_regmap, reg, *val); 161 if (ret < 0) 162 return ret; 163 } else { 164 ret = regmap_read(rt700->sdw_regmap, reg, val); 165 if (ret < 0) 166 return ret; 167 is_hda_reg = 0; 168 } 169 170 if (is_hda_reg || is_index_reg) { 171 sdw_data_3 = 0; 172 sdw_data_2 = 0; 173 sdw_data_1 = 0; 174 sdw_data_0 = 0; 175 ret = regmap_read(rt700->sdw_regmap, 176 RT700_READ_HDA_3, &sdw_data_3); 177 if (ret < 0) 178 return ret; 179 ret = regmap_read(rt700->sdw_regmap, 180 RT700_READ_HDA_2, &sdw_data_2); 181 if (ret < 0) 182 return ret; 183 ret = regmap_read(rt700->sdw_regmap, 184 RT700_READ_HDA_1, &sdw_data_1); 185 if (ret < 0) 186 return ret; 187 ret = regmap_read(rt700->sdw_regmap, 188 RT700_READ_HDA_0, &sdw_data_0); 189 if (ret < 0) 190 return ret; 191 *val = ((sdw_data_3 & 0xff) << 24) | 192 ((sdw_data_2 & 0xff) << 16) | 193 ((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff); 194 } 195 196 if (is_hda_reg == 0) 197 dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val); 198 else if (is_index_reg) 199 dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n", 200 __func__, reg, reg2, reg3, reg4, *val); 201 else 202 dev_dbg(dev, "[%s] %04x %04x => %08x\n", 203 __func__, reg, reg2, *val); 204 205 return 0; 206 } 207 208 static int rt700_sdw_write(void *context, unsigned int reg, unsigned int val) 209 { 210 struct device *dev = context; 211 struct rt700_priv *rt700 = dev_get_drvdata(dev); 212 unsigned int reg2 = 0, reg3, reg4, nid, mask, val2; 213 unsigned int is_index_reg = 0; 214 int ret; 215 216 if (reg > 0xffff) 217 is_index_reg = 1; 218 219 mask = reg & 0xf000; 220 221 if (is_index_reg) { /* index registers */ 222 val2 = reg & 0xff; 223 reg = reg >> 8; 224 nid = reg & 0xff; 225 ret = regmap_write(rt700->sdw_regmap, reg, 0); 226 if (ret < 0) 227 return ret; 228 reg2 = reg + 0x1000; 229 reg2 |= 0x80; 230 ret = regmap_write(rt700->sdw_regmap, reg2, val2); 231 if (ret < 0) 232 return ret; 233 234 reg3 = RT700_PRIV_DATA_W_H | nid; 235 ret = regmap_write(rt700->sdw_regmap, 236 reg3, ((val >> 8) & 0xff)); 237 if (ret < 0) 238 return ret; 239 reg4 = reg3 + 0x1000; 240 reg4 |= 0x80; 241 ret = regmap_write(rt700->sdw_regmap, reg4, (val & 0xff)); 242 if (ret < 0) 243 return ret; 244 is_index_reg = 1; 245 } else if (reg < 0x4fff) { 246 ret = regmap_write(rt700->sdw_regmap, reg, val); 247 if (ret < 0) 248 return ret; 249 } else if (reg == 0xff01) { 250 ret = regmap_write(rt700->sdw_regmap, reg, val); 251 if (ret < 0) 252 return ret; 253 } else if (mask == 0x7000) { 254 ret = regmap_write(rt700->sdw_regmap, 255 reg, ((val >> 8) & 0xff)); 256 if (ret < 0) 257 return ret; 258 reg2 = reg + 0x1000; 259 reg2 |= 0x80; 260 ret = regmap_write(rt700->sdw_regmap, reg2, (val & 0xff)); 261 if (ret < 0) 262 return ret; 263 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */ 264 reg2 = reg - 0x1000; 265 reg2 &= ~0x80; 266 ret = regmap_write(rt700->sdw_regmap, 267 reg2, ((val >> 8) & 0xff)); 268 if (ret < 0) 269 return ret; 270 ret = regmap_write(rt700->sdw_regmap, reg, (val & 0xff)); 271 if (ret < 0) 272 return ret; 273 } 274 275 if (reg2 == 0) 276 dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val); 277 else if (is_index_reg) 278 dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n", 279 __func__, reg, reg2, reg3, reg4, val2, val); 280 else 281 dev_dbg(dev, "[%s] %04x %04x <= %04x\n", 282 __func__, reg, reg2, val); 283 284 return 0; 285 } 286 287 static const struct regmap_config rt700_regmap = { 288 .reg_bits = 24, 289 .val_bits = 32, 290 .readable_reg = rt700_readable_register, 291 .volatile_reg = rt700_volatile_register, 292 .max_register = 0x755800, 293 .reg_defaults = rt700_reg_defaults, 294 .num_reg_defaults = ARRAY_SIZE(rt700_reg_defaults), 295 .cache_type = REGCACHE_RBTREE, 296 .use_single_read = true, 297 .use_single_write = true, 298 .reg_read = rt700_sdw_read, 299 .reg_write = rt700_sdw_write, 300 }; 301 302 static const struct regmap_config rt700_sdw_regmap = { 303 .name = "sdw", 304 .reg_bits = 32, 305 .val_bits = 8, 306 .readable_reg = rt700_readable_register, 307 .max_register = 0xff01, 308 .cache_type = REGCACHE_NONE, 309 .use_single_read = true, 310 .use_single_write = true, 311 }; 312 313 static int rt700_update_status(struct sdw_slave *slave, 314 enum sdw_slave_status status) 315 { 316 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev); 317 318 /* Update the status */ 319 rt700->status = status; 320 321 if (status == SDW_SLAVE_UNATTACHED) 322 rt700->hw_init = false; 323 324 /* 325 * Perform initialization only if slave status is present and 326 * hw_init flag is false 327 */ 328 if (rt700->hw_init || rt700->status != SDW_SLAVE_ATTACHED) 329 return 0; 330 331 /* perform I/O transfers required for Slave initialization */ 332 return rt700_io_init(&slave->dev, slave); 333 } 334 335 static int rt700_read_prop(struct sdw_slave *slave) 336 { 337 struct sdw_slave_prop *prop = &slave->prop; 338 int nval, i; 339 u32 bit; 340 unsigned long addr; 341 struct sdw_dpn_prop *dpn; 342 343 prop->scp_int1_mask = SDW_SCP_INT1_IMPL_DEF | SDW_SCP_INT1_BUS_CLASH | 344 SDW_SCP_INT1_PARITY; 345 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY; 346 347 prop->paging_support = false; 348 349 /* first we need to allocate memory for set bits in port lists */ 350 prop->source_ports = 0x14; /* BITMAP: 00010100 */ 351 prop->sink_ports = 0xA; /* BITMAP: 00001010 */ 352 353 nval = hweight32(prop->source_ports); 354 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval, 355 sizeof(*prop->src_dpn_prop), 356 GFP_KERNEL); 357 if (!prop->src_dpn_prop) 358 return -ENOMEM; 359 360 i = 0; 361 dpn = prop->src_dpn_prop; 362 addr = prop->source_ports; 363 for_each_set_bit(bit, &addr, 32) { 364 dpn[i].num = bit; 365 dpn[i].type = SDW_DPN_FULL; 366 dpn[i].simple_ch_prep_sm = true; 367 dpn[i].ch_prep_timeout = 10; 368 i++; 369 } 370 371 /* do this again for sink now */ 372 nval = hweight32(prop->sink_ports); 373 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval, 374 sizeof(*prop->sink_dpn_prop), 375 GFP_KERNEL); 376 if (!prop->sink_dpn_prop) 377 return -ENOMEM; 378 379 i = 0; 380 dpn = prop->sink_dpn_prop; 381 addr = prop->sink_ports; 382 for_each_set_bit(bit, &addr, 32) { 383 dpn[i].num = bit; 384 dpn[i].type = SDW_DPN_FULL; 385 dpn[i].simple_ch_prep_sm = true; 386 dpn[i].ch_prep_timeout = 10; 387 i++; 388 } 389 390 /* set the timeout values */ 391 prop->clk_stop_timeout = 20; 392 393 /* wake-up event */ 394 prop->wake_capable = 1; 395 396 return 0; 397 } 398 399 static int rt700_bus_config(struct sdw_slave *slave, 400 struct sdw_bus_params *params) 401 { 402 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev); 403 int ret; 404 405 memcpy(&rt700->params, params, sizeof(*params)); 406 407 ret = rt700_clock_config(&slave->dev); 408 if (ret < 0) 409 dev_err(&slave->dev, "Invalid clk config"); 410 411 return ret; 412 } 413 414 static int rt700_interrupt_callback(struct sdw_slave *slave, 415 struct sdw_slave_intr_status *status) 416 { 417 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev); 418 419 dev_dbg(&slave->dev, 420 "%s control_port_stat=%x", __func__, status->control_port); 421 422 mutex_lock(&rt700->disable_irq_lock); 423 if (status->control_port & 0x4 && !rt700->disable_irq) { 424 mod_delayed_work(system_power_efficient_wq, 425 &rt700->jack_detect_work, msecs_to_jiffies(250)); 426 } 427 mutex_unlock(&rt700->disable_irq_lock); 428 429 return 0; 430 } 431 432 /* 433 * slave_ops: callbacks for get_clock_stop_mode, clock_stop and 434 * port_prep are not defined for now 435 */ 436 static const struct sdw_slave_ops rt700_slave_ops = { 437 .read_prop = rt700_read_prop, 438 .interrupt_callback = rt700_interrupt_callback, 439 .update_status = rt700_update_status, 440 .bus_config = rt700_bus_config, 441 }; 442 443 static int rt700_sdw_probe(struct sdw_slave *slave, 444 const struct sdw_device_id *id) 445 { 446 struct regmap *sdw_regmap, *regmap; 447 448 /* Regmap Initialization */ 449 sdw_regmap = devm_regmap_init_sdw(slave, &rt700_sdw_regmap); 450 if (IS_ERR(sdw_regmap)) 451 return PTR_ERR(sdw_regmap); 452 453 regmap = devm_regmap_init(&slave->dev, NULL, 454 &slave->dev, &rt700_regmap); 455 if (IS_ERR(regmap)) 456 return PTR_ERR(regmap); 457 458 rt700_init(&slave->dev, sdw_regmap, regmap, slave); 459 460 return 0; 461 } 462 463 static int rt700_sdw_remove(struct sdw_slave *slave) 464 { 465 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev); 466 467 if (rt700->hw_init) { 468 cancel_delayed_work_sync(&rt700->jack_detect_work); 469 cancel_delayed_work_sync(&rt700->jack_btn_check_work); 470 } 471 472 if (rt700->first_hw_init) 473 pm_runtime_disable(&slave->dev); 474 475 return 0; 476 } 477 478 static const struct sdw_device_id rt700_id[] = { 479 SDW_SLAVE_ENTRY_EXT(0x025d, 0x700, 0x1, 0, 0), 480 {}, 481 }; 482 MODULE_DEVICE_TABLE(sdw, rt700_id); 483 484 static int __maybe_unused rt700_dev_suspend(struct device *dev) 485 { 486 struct rt700_priv *rt700 = dev_get_drvdata(dev); 487 488 if (!rt700->hw_init) 489 return 0; 490 491 cancel_delayed_work_sync(&rt700->jack_detect_work); 492 cancel_delayed_work_sync(&rt700->jack_btn_check_work); 493 494 regcache_cache_only(rt700->regmap, true); 495 496 return 0; 497 } 498 499 static int __maybe_unused rt700_dev_system_suspend(struct device *dev) 500 { 501 struct sdw_slave *slave = dev_to_sdw_dev(dev); 502 struct rt700_priv *rt700 = dev_get_drvdata(dev); 503 int ret; 504 505 if (!rt700->hw_init) 506 return 0; 507 508 /* 509 * prevent new interrupts from being handled after the 510 * deferred work completes and before the parent disables 511 * interrupts on the link 512 */ 513 mutex_lock(&rt700->disable_irq_lock); 514 rt700->disable_irq = true; 515 ret = sdw_update_no_pm(slave, SDW_SCP_INTMASK1, 516 SDW_SCP_INT1_IMPL_DEF, 0); 517 mutex_unlock(&rt700->disable_irq_lock); 518 519 if (ret < 0) { 520 /* log but don't prevent suspend from happening */ 521 dev_dbg(&slave->dev, "%s: could not disable imp-def interrupts\n:", __func__); 522 } 523 524 return rt700_dev_suspend(dev); 525 } 526 527 #define RT700_PROBE_TIMEOUT 5000 528 529 static int __maybe_unused rt700_dev_resume(struct device *dev) 530 { 531 struct sdw_slave *slave = dev_to_sdw_dev(dev); 532 struct rt700_priv *rt700 = dev_get_drvdata(dev); 533 unsigned long time; 534 535 if (!rt700->first_hw_init) 536 return 0; 537 538 if (!slave->unattach_request) 539 goto regmap_sync; 540 541 time = wait_for_completion_timeout(&slave->initialization_complete, 542 msecs_to_jiffies(RT700_PROBE_TIMEOUT)); 543 if (!time) { 544 dev_err(&slave->dev, "Initialization not complete, timed out\n"); 545 return -ETIMEDOUT; 546 } 547 548 regmap_sync: 549 slave->unattach_request = 0; 550 regcache_cache_only(rt700->regmap, false); 551 regcache_sync_region(rt700->regmap, 0x3000, 0x8fff); 552 regcache_sync_region(rt700->regmap, 0x752010, 0x75206b); 553 554 return 0; 555 } 556 557 static const struct dev_pm_ops rt700_pm = { 558 SET_SYSTEM_SLEEP_PM_OPS(rt700_dev_system_suspend, rt700_dev_resume) 559 SET_RUNTIME_PM_OPS(rt700_dev_suspend, rt700_dev_resume, NULL) 560 }; 561 562 static struct sdw_driver rt700_sdw_driver = { 563 .driver = { 564 .name = "rt700", 565 .owner = THIS_MODULE, 566 .pm = &rt700_pm, 567 }, 568 .probe = rt700_sdw_probe, 569 .remove = rt700_sdw_remove, 570 .ops = &rt700_slave_ops, 571 .id_table = rt700_id, 572 }; 573 module_sdw_driver(rt700_sdw_driver); 574 575 MODULE_DESCRIPTION("ASoC RT700 driver SDW"); 576 MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>"); 577 MODULE_LICENSE("GPL v2"); 578