sound/soc/codecs/rt711-sdca-sdw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // rt711-sdw-sdca.c -- rt711 SDCA ALSA SoC audio driver
   4 //
   5 // Copyright(c) 2021 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_registers.h>
  13 #include <linux/module.h>
  14 #include <linux/pm_runtime.h>
  15
  16 #include "rt711-sdca.h"
  17 #include "rt711-sdca-sdw.h"
  18
  19 static bool rt711_sdca_readable_register(struct device *dev, unsigned int reg)
  20 {
  21         switch (reg) {
  22         case 0x201a ... 0x2027:
  23         case 0x2029 ... 0x202a:
  24         case 0x202d ... 0x2034:
  25         case 0x2200 ... 0x2204:
  26         case 0x2206 ... 0x2212:
  27         case 0x2220 ... 0x2223:
  28         case 0x2230 ... 0x2239:
  29         case 0x2f01 ... 0x2f0f:
  30         case 0x2f30 ... 0x2f36:
  31         case 0x2f50 ... 0x2f5a:
  32         case 0x2f60:
  33         case 0x3200 ... 0x3212:
  34         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_GE49, RT711_SDCA_CTL_SELECTED_MODE, 0):
  35         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_GE49, RT711_SDCA_CTL_DETECTED_MODE, 0):
  36         case SDW_SDCA_CTL(FUNC_NUM_HID, RT711_SDCA_ENT_HID01, RT711_SDCA_CTL_HIDTX_CURRENT_OWNER, 0) ...
  37                 SDW_SDCA_CTL(FUNC_NUM_HID, RT711_SDCA_ENT_HID01, RT711_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0):
  38         case RT711_BUF_ADDR_HID1 ... RT711_BUF_ADDR_HID2:
  39                 return true;
  40         default:
  41                 return false;
  42         }
  43 }
  44
  45 static bool rt711_sdca_volatile_register(struct device *dev, unsigned int reg)
  46 {
  47         switch (reg) {
  48         case 0x201b:
  49         case 0x201c:
  50         case 0x201d:
  51         case 0x201f:
  52         case 0x2021:
  53         case 0x2023:
  54         case 0x2230:
  55         case 0x202d ... 0x202f: /* BRA */
  56         case 0x2200 ... 0x2212: /* i2c debug */
  57         case RT711_RC_CAL_STATUS:
  58         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_GE49, RT711_SDCA_CTL_DETECTED_MODE, 0):
  59         case SDW_SDCA_CTL(FUNC_NUM_HID, RT711_SDCA_ENT_HID01, RT711_SDCA_CTL_HIDTX_CURRENT_OWNER, 0) ...
  60                 SDW_SDCA_CTL(FUNC_NUM_HID, RT711_SDCA_ENT_HID01, RT711_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0):
  61         case RT711_BUF_ADDR_HID1 ... RT711_BUF_ADDR_HID2:
  62                 return true;
  63         default:
  64                 return false;
  65         }
  66 }
  67
  68 static bool rt711_sdca_mbq_readable_register(struct device *dev, unsigned int reg)
  69 {
  70         switch (reg) {
  71         case 0x2000000 ... 0x20000ff:
  72         case 0x5600000 ... 0x56000ff:
  73         case 0x5700000 ... 0x57000ff:
  74         case 0x5800000 ... 0x58000ff:
  75         case 0x5900000 ... 0x59000ff:
  76         case 0x5b00000 ... 0x5b000ff:
  77         case 0x5f00000 ... 0x5f000ff:
  78         case 0x6100000 ... 0x61000ff:
  79         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_USER_FU05, RT711_SDCA_CTL_FU_VOLUME, CH_L):
  80         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_USER_FU05, RT711_SDCA_CTL_FU_VOLUME, CH_R):
  81         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT711_SDCA_ENT_USER_FU1E, RT711_SDCA_CTL_FU_VOLUME, CH_L):
  82         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT711_SDCA_ENT_USER_FU1E, RT711_SDCA_CTL_FU_VOLUME, CH_R):
  83         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_USER_FU0F, RT711_SDCA_CTL_FU_VOLUME, CH_L):
  84         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_USER_FU0F, RT711_SDCA_CTL_FU_VOLUME, CH_R):
  85         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_PLATFORM_FU44, RT711_SDCA_CTL_FU_CH_GAIN, CH_L):
  86         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT711_SDCA_ENT_PLATFORM_FU44, RT711_SDCA_CTL_FU_CH_GAIN, CH_R):
  87         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT711_SDCA_ENT_PLATFORM_FU15, RT711_SDCA_CTL_FU_CH_GAIN, CH_L):
  88         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT711_SDCA_ENT_PLATFORM_FU15, RT711_SDCA_CTL_FU_CH_GAIN, CH_R):
  89                 return true;
  90         default:
  91                 return false;
  92         }
  93 }
  94
  95 static bool rt711_sdca_mbq_volatile_register(struct device *dev, unsigned int reg)
  96 {
  97         switch (reg) {
  98         case 0x2000000:
  99         case 0x200001a:
 100         case 0x2000046:
 101         case 0x2000080:
 102         case 0x2000081:
 103         case 0x2000083:
 104         case 0x5800000:
 105         case 0x5800001:
 106         case 0x5f00001:
 107         case 0x6100008:
 108                 return true;
 109         default:
 110                 return false;
 111         }
 112 }
 113
 114 static const struct regmap_config rt711_sdca_regmap = {
 115         .reg_bits = 32,
 116         .val_bits = 8,
 117         .readable_reg = rt711_sdca_readable_register,
 118         .volatile_reg = rt711_sdca_volatile_register,
 119         .max_register = 0x44ffffff,
 120         .reg_defaults = rt711_sdca_reg_defaults,
 121         .num_reg_defaults = ARRAY_SIZE(rt711_sdca_reg_defaults),
 122         .cache_type = REGCACHE_MAPLE,
 123         .use_single_read = true,
 124         .use_single_write = true,
 125 };
 126
 127 static const struct regmap_config rt711_sdca_mbq_regmap = {
 128         .name = "sdw-mbq",
 129         .reg_bits = 32,
 130         .val_bits = 16,
 131         .readable_reg = rt711_sdca_mbq_readable_register,
 132         .volatile_reg = rt711_sdca_mbq_volatile_register,
 133         .max_register = 0x40800f12,
 134         .reg_defaults = rt711_sdca_mbq_defaults,
 135         .num_reg_defaults = ARRAY_SIZE(rt711_sdca_mbq_defaults),
 136         .cache_type = REGCACHE_MAPLE,
 137         .use_single_read = true,
 138         .use_single_write = true,
 139 };
 140
 141 static int rt711_sdca_update_status(struct sdw_slave *slave,
 142                                 enum sdw_slave_status status)
 143 {
 144         struct rt711_sdca_priv *rt711 = dev_get_drvdata(&slave->dev);
 145
 146         if (status == SDW_SLAVE_UNATTACHED)
 147                 rt711->hw_init = false;
 148
 149         if (status == SDW_SLAVE_ATTACHED) {
 150                 if (rt711->hs_jack) {
 151                         /*
 152                          * Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then
 153                          * if the device attached again, we will need to set the setting back.
 154                          * It could avoid losing the jack detection interrupt.
 155                          * This also could sync with the cache value as the rt711_sdca_jack_init set.
 156                          */
 157                         sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INTMASK1,
 158                                 SDW_SCP_SDCA_INTMASK_SDCA_0);
 159                         sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INTMASK2,
 160                                 SDW_SCP_SDCA_INTMASK_SDCA_8);
 161                 }
 162         }
 163
 164         /*
 165          * Perform initialization only if slave status is present and
 166          * hw_init flag is false
 167          */
 168         if (rt711->hw_init || status != SDW_SLAVE_ATTACHED)
 169                 return 0;
 170
 171         /* perform I/O transfers required for Slave initialization */
 172         return rt711_sdca_io_init(&slave->dev, slave);
 173 }
 174
 175 static int rt711_sdca_read_prop(struct sdw_slave *slave)
 176 {
 177         struct sdw_slave_prop *prop = &slave->prop;
 178         int nval;
 179         int i, j;
 180         u32 bit;
 181         unsigned long addr;
 182         struct sdw_dpn_prop *dpn;
 183
 184         prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
 185         prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
 186
 187         prop->paging_support = true;
 188
 189         /* first we need to allocate memory for set bits in port lists */
 190         prop->source_ports = 0x14; /* BITMAP: 00010100 */
 191         prop->sink_ports = 0x8; /* BITMAP:  00001000 */
 192
 193         nval = hweight32(prop->source_ports);
 194         prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
 195                 sizeof(*prop->src_dpn_prop), GFP_KERNEL);
 196         if (!prop->src_dpn_prop)
 197                 return -ENOMEM;
 198
 199         i = 0;
 200         dpn = prop->src_dpn_prop;
 201         addr = prop->source_ports;
 202         for_each_set_bit(bit, &addr, 32) {
 203                 dpn[i].num = bit;
 204                 dpn[i].type = SDW_DPN_FULL;
 205                 dpn[i].simple_ch_prep_sm = true;
 206                 dpn[i].ch_prep_timeout = 10;
 207                 i++;
 208         }
 209
 210         /* do this again for sink now */
 211         nval = hweight32(prop->sink_ports);
 212         prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
 213                 sizeof(*prop->sink_dpn_prop), GFP_KERNEL);
 214         if (!prop->sink_dpn_prop)
 215                 return -ENOMEM;
 216
 217         j = 0;
 218         dpn = prop->sink_dpn_prop;
 219         addr = prop->sink_ports;
 220         for_each_set_bit(bit, &addr, 32) {
 221                 dpn[j].num = bit;
 222                 dpn[j].type = SDW_DPN_FULL;
 223                 dpn[j].simple_ch_prep_sm = true;
 224                 dpn[j].ch_prep_timeout = 10;
 225                 j++;
 226         }
 227
 228         /* set the timeout values */
 229         prop->clk_stop_timeout = 700;
 230
 231         /* wake-up event */
 232         prop->wake_capable = 1;
 233
 234         return 0;
 235 }
 236
 237 static int rt711_sdca_interrupt_callback(struct sdw_slave *slave,
 238                                         struct sdw_slave_intr_status *status)
 239 {
 240         struct rt711_sdca_priv *rt711 = dev_get_drvdata(&slave->dev);
 241         int ret, stat;
 242         int count = 0, retry = 3;
 243         unsigned int sdca_cascade, scp_sdca_stat1, scp_sdca_stat2 = 0;
 244
 245         dev_dbg(&slave->dev,
 246                 "%s control_port_stat=%x, sdca_cascade=%x", __func__,
 247                 status->control_port, status->sdca_cascade);
 248
 249         if (cancel_delayed_work_sync(&rt711->jack_detect_work)) {
 250                 dev_warn(&slave->dev, "%s the pending delayed_work was cancelled", __func__);
 251                 /* avoid the HID owner doesn't change to device */
 252                 if (rt711->scp_sdca_stat2)
 253                         scp_sdca_stat2 = rt711->scp_sdca_stat2;
 254         }
 255
 256         /*
 257          * The critical section below intentionally protects a rather large piece of code.
 258          * We don't want to allow the system suspend to disable an interrupt while we are
 259          * processing it, which could be problematic given the quirky SoundWire interrupt
 260          * scheme. We do want however to prevent new workqueues from being scheduled if
 261          * the disable_irq flag was set during system suspend.
 262          */
 263         mutex_lock(&rt711->disable_irq_lock);
 264
 265         ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT1);
 266         if (ret < 0)
 267                 goto io_error;
 268         rt711->scp_sdca_stat1 = ret;
 269         ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT2);
 270         if (ret < 0)
 271                 goto io_error;
 272         rt711->scp_sdca_stat2 = ret;
 273         if (scp_sdca_stat2)
 274                 rt711->scp_sdca_stat2 |= scp_sdca_stat2;
 275
 276         do {
 277                 /* clear flag */
 278                 ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT1);
 279                 if (ret < 0)
 280                         goto io_error;
 281                 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_0) {
 282                         ret = sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INT1,
 283                                                 SDW_SCP_SDCA_INTMASK_SDCA_0);
 284                         if (ret < 0)
 285                                 goto io_error;
 286                 }
 287                 ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT2);
 288                 if (ret < 0)
 289                         goto io_error;
 290                 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_8) {
 291                         ret = sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INT2,
 292                                                 SDW_SCP_SDCA_INTMASK_SDCA_8);
 293                         if (ret < 0)
 294                                 goto io_error;
 295                 }
 296
 297                 /* check if flag clear or not */
 298                 ret = sdw_read_no_pm(rt711->slave, SDW_DP0_INT);
 299                 if (ret < 0)
 300                         goto io_error;
 301                 sdca_cascade = ret & SDW_DP0_SDCA_CASCADE;
 302
 303                 ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT1);
 304                 if (ret < 0)
 305                         goto io_error;
 306                 scp_sdca_stat1 = ret & SDW_SCP_SDCA_INTMASK_SDCA_0;
 307
 308                 ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT2);
 309                 if (ret < 0)
 310                         goto io_error;
 311                 scp_sdca_stat2 = ret & SDW_SCP_SDCA_INTMASK_SDCA_8;
 312
 313                 stat = scp_sdca_stat1 || scp_sdca_stat2 || sdca_cascade;
 314
 315                 count++;
 316         } while (stat != 0 && count < retry);
 317
 318         if (stat)
 319                 dev_warn(&slave->dev,
 320                         "%s scp_sdca_stat1=0x%x, scp_sdca_stat2=0x%x\n", __func__,
 321                         rt711->scp_sdca_stat1, rt711->scp_sdca_stat2);
 322
 323         if (status->sdca_cascade && !rt711->disable_irq)
 324                 mod_delayed_work(system_power_efficient_wq,
 325                         &rt711->jack_detect_work, msecs_to_jiffies(30));
 326
 327         mutex_unlock(&rt711->disable_irq_lock);
 328
 329         return 0;
 330
 331 io_error:
 332         mutex_unlock(&rt711->disable_irq_lock);
 333         pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret);
 334         return ret;
 335 }
 336
 337 static const struct sdw_slave_ops rt711_sdca_slave_ops = {
 338         .read_prop = rt711_sdca_read_prop,
 339         .interrupt_callback = rt711_sdca_interrupt_callback,
 340         .update_status = rt711_sdca_update_status,
 341 };
 342
 343 static int rt711_sdca_sdw_probe(struct sdw_slave *slave,
 344                                 const struct sdw_device_id *id)
 345 {
 346         struct regmap *regmap, *mbq_regmap;
 347
 348         /* Regmap Initialization */
 349         mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt711_sdca_mbq_regmap);
 350         if (IS_ERR(mbq_regmap))
 351                 return PTR_ERR(mbq_regmap);
 352
 353         regmap = devm_regmap_init_sdw(slave, &rt711_sdca_regmap);
 354         if (IS_ERR(regmap))
 355                 return PTR_ERR(regmap);
 356
 357         return rt711_sdca_init(&slave->dev, regmap, mbq_regmap, slave);
 358 }
 359
 360 static int rt711_sdca_sdw_remove(struct sdw_slave *slave)
 361 {
 362         struct rt711_sdca_priv *rt711 = dev_get_drvdata(&slave->dev);
 363
 364         if (rt711->hw_init) {
 365                 cancel_delayed_work_sync(&rt711->jack_detect_work);
 366                 cancel_delayed_work_sync(&rt711->jack_btn_check_work);
 367         }
 368
 369         pm_runtime_disable(&slave->dev);
 370
 371         mutex_destroy(&rt711->calibrate_mutex);
 372         mutex_destroy(&rt711->disable_irq_lock);
 373
 374         return 0;
 375 }
 376
 377 static const struct sdw_device_id rt711_sdca_id[] = {
 378         SDW_SLAVE_ENTRY_EXT(0x025d, 0x711, 0x3, 0x1, 0),
 379         {},
 380 };
 381 MODULE_DEVICE_TABLE(sdw, rt711_sdca_id);
 382
 383 static int __maybe_unused rt711_sdca_dev_suspend(struct device *dev)
 384 {
 385         struct rt711_sdca_priv *rt711 = dev_get_drvdata(dev);
 386
 387         if (!rt711->hw_init)
 388                 return 0;
 389
 390         cancel_delayed_work_sync(&rt711->jack_detect_work);
 391         cancel_delayed_work_sync(&rt711->jack_btn_check_work);
 392
 393         regcache_cache_only(rt711->regmap, true);
 394         regcache_cache_only(rt711->mbq_regmap, true);
 395
 396         return 0;
 397 }
 398
 399 static int __maybe_unused rt711_sdca_dev_system_suspend(struct device *dev)
 400 {
 401         struct rt711_sdca_priv *rt711_sdca = dev_get_drvdata(dev);
 402         struct sdw_slave *slave = dev_to_sdw_dev(dev);
 403         int ret1, ret2;
 404
 405         if (!rt711_sdca->hw_init)
 406                 return 0;
 407
 408         /*
 409          * prevent new interrupts from being handled after the
 410          * deferred work completes and before the parent disables
 411          * interrupts on the link
 412          */
 413         mutex_lock(&rt711_sdca->disable_irq_lock);
 414         rt711_sdca->disable_irq = true;
 415         ret1 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK1,
 416                                 SDW_SCP_SDCA_INTMASK_SDCA_0, 0);
 417         ret2 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK2,
 418                                 SDW_SCP_SDCA_INTMASK_SDCA_8, 0);
 419         mutex_unlock(&rt711_sdca->disable_irq_lock);
 420
 421         if (ret1 < 0 || ret2 < 0) {
 422                 /* log but don't prevent suspend from happening */
 423                 dev_dbg(&slave->dev, "%s: could not disable SDCA interrupts\n:", __func__);
 424         }
 425
 426         return rt711_sdca_dev_suspend(dev);
 427 }
 428
 429 #define RT711_PROBE_TIMEOUT 5000
 430
 431 static int __maybe_unused rt711_sdca_dev_resume(struct device *dev)
 432 {
 433         struct sdw_slave *slave = dev_to_sdw_dev(dev);
 434         struct rt711_sdca_priv *rt711 = dev_get_drvdata(dev);
 435         unsigned long time;
 436
 437         if (!rt711->first_hw_init)
 438                 return 0;
 439
 440         if (!slave->unattach_request) {
 441                 mutex_lock(&rt711->disable_irq_lock);
 442                 if (rt711->disable_irq == true) {
 443                         sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK1, SDW_SCP_SDCA_INTMASK_SDCA_0);
 444                         sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK2, SDW_SCP_SDCA_INTMASK_SDCA_8);
 445                         rt711->disable_irq = false;
 446                 }
 447                 mutex_unlock(&rt711->disable_irq_lock);
 448                 goto regmap_sync;
 449         }
 450
 451         time = wait_for_completion_timeout(&slave->initialization_complete,
 452                                 msecs_to_jiffies(RT711_PROBE_TIMEOUT));
 453         if (!time) {
 454                 dev_err(&slave->dev, "%s: Initialization not complete, timed out\n", __func__);
 455                 sdw_show_ping_status(slave->bus, true);
 456
 457                 return -ETIMEDOUT;
 458         }
 459
 460 regmap_sync:
 461         slave->unattach_request = 0;
 462         regcache_cache_only(rt711->regmap, false);
 463         regcache_sync(rt711->regmap);
 464         regcache_cache_only(rt711->mbq_regmap, false);
 465         regcache_sync(rt711->mbq_regmap);
 466         return 0;
 467 }
 468
 469 static const struct dev_pm_ops rt711_sdca_pm = {
 470         SET_SYSTEM_SLEEP_PM_OPS(rt711_sdca_dev_system_suspend, rt711_sdca_dev_resume)
 471         SET_RUNTIME_PM_OPS(rt711_sdca_dev_suspend, rt711_sdca_dev_resume, NULL)
 472 };
 473
 474 static struct sdw_driver rt711_sdca_sdw_driver = {
 475         .driver = {
 476                 .name = "rt711-sdca",
 477                 .pm = &rt711_sdca_pm,
 478         },
 479         .probe = rt711_sdca_sdw_probe,
 480         .remove = rt711_sdca_sdw_remove,
 481         .ops = &rt711_sdca_slave_ops,
 482         .id_table = rt711_sdca_id,
 483 };
 484 module_sdw_driver(rt711_sdca_sdw_driver);
 485
 486 MODULE_DESCRIPTION("ASoC RT711 SDCA SDW driver");
 487 MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>");
 488 MODULE_LICENSE("GPL");