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/regmap.h>
  17 #include <sound/soc.h>
  18 #include "rt711.h"
  19 #include "rt711-sdw.h"
  20
  21 static bool rt711_readable_register(struct device *dev, unsigned int reg)
  22 {
  23         switch (reg) {
  24         case 0x00e0:
  25         case 0x00f0:
  26         case 0x2012 ... 0x2016:
  27         case 0x201a ... 0x2027:
  28         case 0x2029 ... 0x202a:
  29         case 0x202d ... 0x2034:
  30         case 0x2201 ... 0x2204:
  31         case 0x2206 ... 0x2212:
  32         case 0x2220 ... 0x2223:
  33         case 0x2230 ... 0x2239:
  34         case 0x2f01 ... 0x2f0f:
  35         case 0x3000 ... 0x3fff:
  36         case 0x7000 ... 0x7fff:
  37         case 0x8300 ... 0x83ff:
  38         case 0x9c00 ... 0x9cff:
  39         case 0xb900 ... 0xb9ff:
  40         case 0x752009:
  41         case 0x752011:
  42         case 0x75201a:
  43         case 0x752045:
  44         case 0x752046:
  45         case 0x752048:
  46         case 0x75204a:
  47         case 0x75206b:
  48         case 0x75206f:
  49         case 0x752080:
  50         case 0x752081:
  51         case 0x752091:
  52         case 0x755800:
  53                 return true;
  54         default:
  55                 return false;
  56         }
  57 }
  58
  59 static bool rt711_volatile_register(struct device *dev, unsigned int reg)
  60 {
  61         switch (reg) {
  62         case 0x2016:
  63         case 0x201b:
  64         case 0x201c:
  65         case 0x201d:
  66         case 0x201f:
  67         case 0x2021:
  68         case 0x2023:
  69         case 0x2230:
  70         case 0x2012 ... 0x2015: /* HD-A read */
  71         case 0x202d ... 0x202f: /* BRA */
  72         case 0x2201 ... 0x2212: /* i2c debug */
  73         case 0x2220 ... 0x2223: /* decoded HD-A */
  74         case 0x9c00 ... 0x9cff:
  75         case 0xb900 ... 0xb9ff:
  76         case 0xff01:
  77         case 0x75201a:
  78         case 0x752046:
  79         case 0x752080:
  80         case 0x752081:
  81         case 0x755800:
  82                 return true;
  83         default:
  84                 return false;
  85         }
  86 }
  87
  88 static int rt711_sdw_read(void *context, unsigned int reg, unsigned int *val)
  89 {
  90         struct device *dev = context;
  91         struct rt711_priv *rt711 = dev_get_drvdata(dev);
  92         unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0;
  93         unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2;
  94         unsigned int is_hda_reg = 1, is_index_reg = 0;
  95         int ret;
  96
  97         if (reg > 0xffff)
  98                 is_index_reg = 1;
  99
 100         mask = reg & 0xf000;
 101
 102         if (is_index_reg) { /* index registers */
 103                 val2 = reg & 0xff;
 104                 reg = reg >> 8;
 105                 nid = reg & 0xff;
 106                 ret = regmap_write(rt711->sdw_regmap, reg, 0);
 107                 if (ret < 0)
 108                         return ret;
 109                 reg2 = reg + 0x1000;
 110                 reg2 |= 0x80;
 111                 ret = regmap_write(rt711->sdw_regmap, reg2, val2);
 112                 if (ret < 0)
 113                         return ret;
 114
 115                 reg3 = RT711_PRIV_DATA_R_H | nid;
 116                 ret = regmap_write(rt711->sdw_regmap,
 117                         reg3, ((*val >> 8) & 0xff));
 118                 if (ret < 0)
 119                         return ret;
 120                 reg4 = reg3 + 0x1000;
 121                 reg4 |= 0x80;
 122                 ret = regmap_write(rt711->sdw_regmap, reg4, (*val & 0xff));
 123                 if (ret < 0)
 124                         return ret;
 125         } else if (mask   == 0x3000) {
 126                 reg += 0x8000;
 127                 ret = regmap_write(rt711->sdw_regmap, reg, *val);
 128                 if (ret < 0)
 129                         return ret;
 130         } else if (mask == 0x7000) {
 131                 reg += 0x2000;
 132                 reg |= 0x800;
 133                 ret = regmap_write(rt711->sdw_regmap,
 134                         reg, ((*val >> 8) & 0xff));
 135                 if (ret < 0)
 136                         return ret;
 137                 reg2 = reg + 0x1000;
 138                 reg2 |= 0x80;
 139                 ret = regmap_write(rt711->sdw_regmap, reg2, (*val & 0xff));
 140                 if (ret < 0)
 141                         return ret;
 142         } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
 143                 reg2 = reg - 0x1000;
 144                 reg2 &= ~0x80;
 145                 ret = regmap_write(rt711->sdw_regmap,
 146                         reg2, ((*val >> 8) & 0xff));
 147                 if (ret < 0)
 148                         return ret;
 149                 ret = regmap_write(rt711->sdw_regmap, reg, (*val & 0xff));
 150                 if (ret < 0)
 151                         return ret;
 152         } else if (mask == 0x9000) {
 153                 ret = regmap_write(rt711->sdw_regmap,
 154                         reg, ((*val >> 8) & 0xff));
 155                 if (ret < 0)
 156                         return ret;
 157                 reg2 = reg + 0x1000;
 158                 reg2 |= 0x80;
 159                 ret = regmap_write(rt711->sdw_regmap, reg2, (*val & 0xff));
 160                 if (ret < 0)
 161                         return ret;
 162         } else if (mask == 0xb000) {
 163                 ret = regmap_write(rt711->sdw_regmap, reg, *val);
 164                 if (ret < 0)
 165                         return ret;
 166         } else {
 167                 ret = regmap_read(rt711->sdw_regmap, reg, val);
 168                 if (ret < 0)
 169                         return ret;
 170                 is_hda_reg = 0;
 171         }
 172
 173         if (is_hda_reg || is_index_reg) {
 174                 sdw_data_3 = 0;
 175                 sdw_data_2 = 0;
 176                 sdw_data_1 = 0;
 177                 sdw_data_0 = 0;
 178                 ret = regmap_read(rt711->sdw_regmap,
 179                         RT711_READ_HDA_3, &sdw_data_3);
 180                 if (ret < 0)
 181                         return ret;
 182                 ret = regmap_read(rt711->sdw_regmap,
 183                         RT711_READ_HDA_2, &sdw_data_2);
 184                 if (ret < 0)
 185                         return ret;
 186                 ret = regmap_read(rt711->sdw_regmap,
 187                         RT711_READ_HDA_1, &sdw_data_1);
 188                 if (ret < 0)
 189                         return ret;
 190                 ret = regmap_read(rt711->sdw_regmap,
 191                         RT711_READ_HDA_0, &sdw_data_0);
 192                 if (ret < 0)
 193                         return ret;
 194                 *val = ((sdw_data_3 & 0xff) << 24) |
 195                         ((sdw_data_2 & 0xff) << 16) |
 196                         ((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff);
 197         }
 198
 199         if (is_hda_reg == 0)
 200                 dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val);
 201         else if (is_index_reg)
 202                 dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n",
 203                         __func__, reg, reg2, reg3, reg4, *val);
 204         else
 205                 dev_dbg(dev, "[%s] %04x %04x => %08x\n",
 206                         __func__, reg, reg2, *val);
 207
 208         return 0;
 209 }
 210
 211 static int rt711_sdw_write(void *context, unsigned int reg, unsigned int val)
 212 {
 213         struct device *dev = context;
 214         struct rt711_priv *rt711 = dev_get_drvdata(dev);
 215         unsigned int reg2 = 0, reg3, reg4, nid, mask, val2;
 216         unsigned int is_index_reg = 0;
 217         int ret;
 218
 219         if (reg > 0xffff)
 220                 is_index_reg = 1;
 221
 222         mask = reg & 0xf000;
 223
 224         if (is_index_reg) { /* index registers */
 225                 val2 = reg & 0xff;
 226                 reg = reg >> 8;
 227                 nid = reg & 0xff;
 228                 ret = regmap_write(rt711->sdw_regmap, reg, 0);
 229                 if (ret < 0)
 230                         return ret;
 231                 reg2 = reg + 0x1000;
 232                 reg2 |= 0x80;
 233                 ret = regmap_write(rt711->sdw_regmap, reg2, val2);
 234                 if (ret < 0)
 235                         return ret;
 236
 237                 reg3 = RT711_PRIV_DATA_W_H | nid;
 238                 ret = regmap_write(rt711->sdw_regmap,
 239                         reg3, ((val >> 8) & 0xff));
 240                 if (ret < 0)
 241                         return ret;
 242                 reg4 = reg3 + 0x1000;
 243                 reg4 |= 0x80;
 244                 ret = regmap_write(rt711->sdw_regmap, reg4, (val & 0xff));
 245                 if (ret < 0)
 246                         return ret;
 247                 is_index_reg = 1;
 248         } else if (reg < 0x4fff) {
 249                 ret = regmap_write(rt711->sdw_regmap, reg, val);
 250                 if (ret < 0)
 251                         return ret;
 252         } else if (reg == RT711_FUNC_RESET) {
 253                 ret = regmap_write(rt711->sdw_regmap, reg, val);
 254                 if (ret < 0)
 255                         return ret;
 256         } else if (mask == 0x7000) {
 257                 ret = regmap_write(rt711->sdw_regmap,
 258                         reg, ((val >> 8) & 0xff));
 259                 if (ret < 0)
 260                         return ret;
 261                 reg2 = reg + 0x1000;
 262                 reg2 |= 0x80;
 263                 ret = regmap_write(rt711->sdw_regmap, reg2, (val & 0xff));
 264                 if (ret < 0)
 265                         return ret;
 266         } else if ((reg & 0xff00) == 0x8300) {  /* for R channel */
 267                 reg2 = reg - 0x1000;
 268                 reg2 &= ~0x80;
 269                 ret = regmap_write(rt711->sdw_regmap,
 270                         reg2, ((val >> 8) & 0xff));
 271                 if (ret < 0)
 272                         return ret;
 273                 ret = regmap_write(rt711->sdw_regmap, reg, (val & 0xff));
 274                 if (ret < 0)
 275                         return ret;
 276         }
 277
 278         if (reg2 == 0)
 279                 dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val);
 280         else if (is_index_reg)
 281                 dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n",
 282                         __func__, reg, reg2, reg3, reg4, val2, val);
 283         else
 284                 dev_dbg(dev, "[%s] %04x %04x <= %04x\n",
 285                         __func__, reg, reg2, val);
 286
 287         return 0;
 288 }
 289
 290 static const struct regmap_config rt711_regmap = {
 291         .reg_bits = 24,
 292         .val_bits = 32,
 293         .readable_reg = rt711_readable_register,
 294         .volatile_reg = rt711_volatile_register,
 295         .max_register = 0x755800,
 296         .reg_defaults = rt711_reg_defaults,
 297         .num_reg_defaults = ARRAY_SIZE(rt711_reg_defaults),
 298         .cache_type = REGCACHE_RBTREE,
 299         .use_single_read = true,
 300         .use_single_write = true,
 301         .reg_read = rt711_sdw_read,
 302         .reg_write = rt711_sdw_write,
 303 };
 304
 305 static const struct regmap_config rt711_sdw_regmap = {
 306         .name = "sdw",
 307         .reg_bits = 32,
 308         .val_bits = 8,
 309         .readable_reg = rt711_readable_register,
 310         .max_register = 0xff01,
 311         .cache_type = REGCACHE_NONE,
 312         .use_single_read = true,
 313         .use_single_write = true,
 314 };
 315
 316 static int rt711_update_status(struct sdw_slave *slave,
 317                                 enum sdw_slave_status status)
 318 {
 319         struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev);
 320
 321         /* Update the status */
 322         rt711->status = status;
 323
 324         if (status == SDW_SLAVE_UNATTACHED)
 325                 rt711->hw_init = false;
 326
 327         /*
 328          * Perform initialization only if slave status is present and
 329          * hw_init flag is false
 330          */
 331         if (rt711->hw_init || rt711->status != SDW_SLAVE_ATTACHED)
 332                 return 0;
 333
 334         /* perform I/O transfers required for Slave initialization */
 335         return rt711_io_init(&slave->dev, slave);
 336 }
 337
 338 static int rt711_read_prop(struct sdw_slave *slave)
 339 {
 340         struct sdw_slave_prop *prop = &slave->prop;
 341         int nval, i;
 342         u32 bit;
 343         unsigned long addr;
 344         struct sdw_dpn_prop *dpn;
 345
 346         prop->scp_int1_mask = SDW_SCP_INT1_IMPL_DEF | SDW_SCP_INT1_BUS_CLASH |
 347                 SDW_SCP_INT1_PARITY;
 348         prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
 349
 350         prop->paging_support = false;
 351
 352         /* first we need to allocate memory for set bits in port lists */
 353         prop->source_ports = 0x14; /* BITMAP: 00010100 */
 354         prop->sink_ports = 0x8; /* BITMAP:  00001000 */
 355
 356         nval = hweight32(prop->source_ports);
 357         prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
 358                                                 sizeof(*prop->src_dpn_prop),
 359                                                 GFP_KERNEL);
 360         if (!prop->src_dpn_prop)
 361                 return -ENOMEM;
 362
 363         i = 0;
 364         dpn = prop->src_dpn_prop;
 365         addr = prop->source_ports;
 366         for_each_set_bit(bit, &addr, 32) {
 367                 dpn[i].num = bit;
 368                 dpn[i].type = SDW_DPN_FULL;
 369                 dpn[i].simple_ch_prep_sm = true;
 370                 dpn[i].ch_prep_timeout = 10;
 371                 i++;
 372         }
 373
 374         /* do this again for sink now */
 375         nval = hweight32(prop->sink_ports);
 376         prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
 377                                                 sizeof(*prop->sink_dpn_prop),
 378                                                 GFP_KERNEL);
 379         if (!prop->sink_dpn_prop)
 380                 return -ENOMEM;
 381
 382         i = 0;
 383         dpn = prop->sink_dpn_prop;
 384         addr = prop->sink_ports;
 385         for_each_set_bit(bit, &addr, 32) {
 386                 dpn[i].num = bit;
 387                 dpn[i].type = SDW_DPN_FULL;
 388                 dpn[i].simple_ch_prep_sm = true;
 389                 dpn[i].ch_prep_timeout = 10;
 390                 i++;
 391         }
 392
 393         /* set the timeout values */
 394         prop->clk_stop_timeout = 20;
 395
 396         /* wake-up event */
 397         prop->wake_capable = 1;
 398
 399         return 0;
 400 }
 401
 402 static int rt711_bus_config(struct sdw_slave *slave,
 403                                 struct sdw_bus_params *params)
 404 {
 405         struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev);
 406         int ret;
 407
 408         memcpy(&rt711->params, params, sizeof(*params));
 409
 410         ret = rt711_clock_config(&slave->dev);
 411         if (ret < 0)
 412                 dev_err(&slave->dev, "Invalid clk config");
 413
 414         return ret;
 415 }
 416
 417 static int rt711_interrupt_callback(struct sdw_slave *slave,
 418                                         struct sdw_slave_intr_status *status)
 419 {
 420         struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev);
 421
 422         dev_dbg(&slave->dev,
 423                 "%s control_port_stat=%x", __func__, status->control_port);
 424
 425         if (status->control_port & 0x4) {
 426                 mod_delayed_work(system_power_efficient_wq,
 427                         &rt711->jack_detect_work, msecs_to_jiffies(250));
 428         }
 429
 430         return 0;
 431 }
 432
 433 static struct sdw_slave_ops rt711_slave_ops = {
 434         .read_prop = rt711_read_prop,
 435         .interrupt_callback = rt711_interrupt_callback,
 436         .update_status = rt711_update_status,
 437         .bus_config = rt711_bus_config,
 438 };
 439
 440 static int rt711_sdw_probe(struct sdw_slave *slave,
 441                                 const struct sdw_device_id *id)
 442 {
 443         struct regmap *sdw_regmap, *regmap;
 444
 445         /* Regmap Initialization */
 446         sdw_regmap = devm_regmap_init_sdw(slave, &rt711_sdw_regmap);
 447         if (IS_ERR(sdw_regmap))
 448                 return PTR_ERR(sdw_regmap);
 449
 450         regmap = devm_regmap_init(&slave->dev, NULL,
 451                 &slave->dev, &rt711_regmap);
 452         if (IS_ERR(regmap))
 453                 return PTR_ERR(regmap);
 454
 455         rt711_init(&slave->dev, sdw_regmap, regmap, slave);
 456
 457         return 0;
 458 }
 459
 460 static int rt711_sdw_remove(struct sdw_slave *slave)
 461 {
 462         struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev);
 463
 464         if (rt711 && rt711->hw_init) {
 465                 cancel_delayed_work(&rt711->jack_detect_work);
 466                 cancel_delayed_work(&rt711->jack_btn_check_work);
 467                 cancel_work_sync(&rt711->calibration_work);
 468         }
 469
 470         return 0;
 471 }
 472
 473 static const struct sdw_device_id rt711_id[] = {
 474         SDW_SLAVE_ENTRY_EXT(0x025d, 0x711, 0x2, 0, 0),
 475         {},
 476 };
 477 MODULE_DEVICE_TABLE(sdw, rt711_id);
 478
 479 static int __maybe_unused rt711_dev_suspend(struct device *dev)
 480 {
 481         struct rt711_priv *rt711 = dev_get_drvdata(dev);
 482
 483         if (!rt711->hw_init)
 484                 return 0;
 485
 486         cancel_delayed_work_sync(&rt711->jack_detect_work);
 487         cancel_delayed_work_sync(&rt711->jack_btn_check_work);
 488         cancel_work_sync(&rt711->calibration_work);
 489
 490         regcache_cache_only(rt711->regmap, true);
 491
 492         return 0;
 493 }
 494
 495 #define RT711_PROBE_TIMEOUT 2000
 496
 497 static int __maybe_unused rt711_dev_resume(struct device *dev)
 498 {
 499         struct sdw_slave *slave = dev_to_sdw_dev(dev);
 500         struct rt711_priv *rt711 = dev_get_drvdata(dev);
 501         unsigned long time;
 502
 503         if (!rt711->hw_init)
 504                 return 0;
 505
 506         if (!slave->unattach_request)
 507                 goto regmap_sync;
 508
 509         time = wait_for_completion_timeout(&slave->initialization_complete,
 510                                 msecs_to_jiffies(RT711_PROBE_TIMEOUT));
 511         if (!time) {
 512                 dev_err(&slave->dev, "Initialization not complete, timed out\n");
 513                 return -ETIMEDOUT;
 514         }
 515
 516 regmap_sync:
 517         slave->unattach_request = 0;
 518         regcache_cache_only(rt711->regmap, false);
 519         regcache_sync_region(rt711->regmap, 0x3000, 0x8fff);
 520         regcache_sync_region(rt711->regmap, 0x752009, 0x752091);
 521
 522         return 0;
 523 }
 524
 525 static const struct dev_pm_ops rt711_pm = {
 526         SET_SYSTEM_SLEEP_PM_OPS(rt711_dev_suspend, rt711_dev_resume)
 527         SET_RUNTIME_PM_OPS(rt711_dev_suspend, rt711_dev_resume, NULL)
 528 };
 529
 530 static struct sdw_driver rt711_sdw_driver = {
 531         .driver = {
 532                 .name = "rt711",
 533                 .owner = THIS_MODULE,
 534                 .pm = &rt711_pm,
 535         },
 536         .probe = rt711_sdw_probe,
 537         .remove = rt711_sdw_remove,
 538         .ops = &rt711_slave_ops,
 539         .id_table = rt711_id,
 540 };
 541 module_sdw_driver(rt711_sdw_driver);
 542
 543 MODULE_DESCRIPTION("ASoC RT711 SDW driver");
 544 MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>");
 545 MODULE_LICENSE("GPL");