sound/soc/codecs/rt711-sdw.c

   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");