sound/soc/codecs/rt722-sdca-sdw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // rt722-sdca-sdw.c -- rt722 SDCA ALSA SoC audio driver
   4 //
   5 // Copyright(c) 2023 Realtek Semiconductor Corp.
   6 //
   7 //
   8
   9 #include <linux/delay.h>
  10 #include <linux/device.h>
  11 #include <linux/module.h>
  12 #include <linux/mod_devicetable.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/soundwire/sdw_registers.h>
  15
  16 #include "rt722-sdca.h"
  17 #include "rt722-sdca-sdw.h"
  18
  19 static bool rt722_sdca_readable_register(struct device *dev, unsigned int reg)
  20 {
  21         switch (reg) {
  22         case 0x2f01 ... 0x2f0a:
  23         case 0x2f35 ... 0x2f36:
  24         case 0x2f50:
  25         case 0x2f54:
  26         case 0x2f58 ... 0x2f5d:
  27         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_GE49, RT722_SDCA_CTL_SELECTED_MODE,
  28                         0):
  29         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_GE49, RT722_SDCA_CTL_DETECTED_MODE,
  30                         0):
  31         case SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01, RT722_SDCA_CTL_HIDTX_CURRENT_OWNER,
  32                         0) ... SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01,
  33                         RT722_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0):
  34         case RT722_BUF_ADDR_HID1 ... RT722_BUF_ADDR_HID2:
  35                 return true;
  36         default:
  37                 return false;
  38         }
  39 }
  40
  41 static bool rt722_sdca_volatile_register(struct device *dev, unsigned int reg)
  42 {
  43         switch (reg) {
  44         case 0x2f01:
  45         case 0x2f54:
  46         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_GE49, RT722_SDCA_CTL_DETECTED_MODE,
  47                         0):
  48         case SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01, RT722_SDCA_CTL_HIDTX_CURRENT_OWNER,
  49                         0) ... SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01,
  50                         RT722_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0):
  51         case RT722_BUF_ADDR_HID1 ... RT722_BUF_ADDR_HID2:
  52                 return true;
  53         default:
  54                 return false;
  55         }
  56 }
  57
  58 static bool rt722_sdca_mbq_readable_register(struct device *dev, unsigned int reg)
  59 {
  60         switch (reg) {
  61         case 0x2000000 ... 0x2000024:
  62         case 0x2000029 ... 0x200004a:
  63         case 0x2000051 ... 0x2000052:
  64         case 0x200005a ... 0x200005b:
  65         case 0x2000061 ... 0x2000069:
  66         case 0x200006b:
  67         case 0x2000070:
  68         case 0x200007f:
  69         case 0x2000082 ... 0x200008e:
  70         case 0x2000090 ... 0x2000094:
  71         case 0x5300000 ... 0x5300002:
  72         case 0x5400002:
  73         case 0x5600000 ... 0x5600007:
  74         case 0x5700000 ... 0x5700004:
  75         case 0x5800000 ... 0x5800004:
  76         case 0x5b00003:
  77         case 0x5c00011:
  78         case 0x5d00006:
  79         case 0x5f00000 ... 0x5f0000d:
  80         case 0x5f00030:
  81         case 0x6100000 ... 0x6100051:
  82         case 0x6100055 ... 0x6100057:
  83         case 0x6100062:
  84         case 0x6100064 ... 0x6100065:
  85         case 0x6100067:
  86         case 0x6100070 ... 0x610007c:
  87         case 0x6100080:
  88         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
  89                         CH_01):
  90         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
  91                         CH_02):
  92         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
  93                         CH_03):
  94         case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
  95                         CH_04):
  96         case SDW_SDCA_CTL(FUNC_NUM_AMP, RT722_SDCA_ENT_USER_FU06, RT722_SDCA_CTL_FU_VOLUME, CH_L):
  97         case SDW_SDCA_CTL(FUNC_NUM_AMP, RT722_SDCA_ENT_USER_FU06, RT722_SDCA_CTL_FU_VOLUME, CH_R):
  98         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU05, RT722_SDCA_CTL_FU_VOLUME,
  99                         CH_L):
 100         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU05, RT722_SDCA_CTL_FU_VOLUME,
 101                         CH_R):
 102         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU0F, RT722_SDCA_CTL_FU_VOLUME,
 103                         CH_L):
 104         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU0F, RT722_SDCA_CTL_FU_VOLUME,
 105                         CH_R):
 106         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_PLATFORM_FU44,
 107                         RT722_SDCA_CTL_FU_CH_GAIN, CH_L):
 108         case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_PLATFORM_FU44,
 109                         RT722_SDCA_CTL_FU_CH_GAIN, CH_R):
 110                 return true;
 111         default:
 112                 return false;
 113         }
 114 }
 115
 116 static bool rt722_sdca_mbq_volatile_register(struct device *dev, unsigned int reg)
 117 {
 118         switch (reg) {
 119         case 0x2000000:
 120         case 0x200000d:
 121         case 0x2000019:
 122         case 0x2000020:
 123         case 0x2000030:
 124         case 0x2000046:
 125         case 0x2000067:
 126         case 0x2000084:
 127         case 0x2000086:
 128                 return true;
 129         default:
 130                 return false;
 131         }
 132 }
 133
 134 static const struct regmap_config rt722_sdca_regmap = {
 135         .reg_bits = 32,
 136         .val_bits = 8,
 137         .readable_reg = rt722_sdca_readable_register,
 138         .volatile_reg = rt722_sdca_volatile_register,
 139         .max_register = 0x44ffffff,
 140         .reg_defaults = rt722_sdca_reg_defaults,
 141         .num_reg_defaults = ARRAY_SIZE(rt722_sdca_reg_defaults),
 142         .cache_type = REGCACHE_MAPLE,
 143         .use_single_read = true,
 144         .use_single_write = true,
 145 };
 146
 147 static const struct regmap_config rt722_sdca_mbq_regmap = {
 148         .name = "sdw-mbq",
 149         .reg_bits = 32,
 150         .val_bits = 16,
 151         .readable_reg = rt722_sdca_mbq_readable_register,
 152         .volatile_reg = rt722_sdca_mbq_volatile_register,
 153         .max_register = 0x41000312,
 154         .reg_defaults = rt722_sdca_mbq_defaults,
 155         .num_reg_defaults = ARRAY_SIZE(rt722_sdca_mbq_defaults),
 156         .cache_type = REGCACHE_MAPLE,
 157         .use_single_read = true,
 158         .use_single_write = true,
 159 };
 160
 161 static int rt722_sdca_update_status(struct sdw_slave *slave,
 162                                 enum sdw_slave_status status)
 163 {
 164         struct rt722_sdca_priv *rt722 = dev_get_drvdata(&slave->dev);
 165
 166         if (status == SDW_SLAVE_UNATTACHED)
 167                 rt722->hw_init = false;
 168
 169         if (status == SDW_SLAVE_ATTACHED) {
 170                 if (rt722->hs_jack) {
 171                 /*
 172                  * Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then
 173                  * if the device attached again, we will need to set the setting back.
 174                  * It could avoid losing the jack detection interrupt.
 175                  * This also could sync with the cache value as the rt722_sdca_jack_init set.
 176                  */
 177                         sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INTMASK1,
 178                                 SDW_SCP_SDCA_INTMASK_SDCA_6);
 179                         sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INTMASK2,
 180                                 SDW_SCP_SDCA_INTMASK_SDCA_8);
 181                 }
 182         }
 183
 184         /*
 185          * Perform initialization only if slave status is present and
 186          * hw_init flag is false
 187          */
 188         if (rt722->hw_init || status != SDW_SLAVE_ATTACHED)
 189                 return 0;
 190
 191         /* perform I/O transfers required for Slave initialization */
 192         return rt722_sdca_io_init(&slave->dev, slave);
 193 }
 194
 195 static int rt722_sdca_read_prop(struct sdw_slave *slave)
 196 {
 197         struct sdw_slave_prop *prop = &slave->prop;
 198         int nval;
 199         int i, j;
 200         u32 bit;
 201         unsigned long addr;
 202         struct sdw_dpn_prop *dpn;
 203
 204         prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
 205         prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
 206
 207         prop->paging_support = true;
 208
 209         /*
 210          * port = 1 for headphone playback
 211          * port = 2 for headset-mic capture
 212          * port = 3 for speaker playback
 213          * port = 6 for digital-mic capture
 214          */
 215         prop->source_ports = BIT(6) | BIT(2); /* BITMAP: 01000100 */
 216         prop->sink_ports = BIT(3) | BIT(1); /* BITMAP:  00001010 */
 217
 218         nval = hweight32(prop->source_ports);
 219         prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
 220                 sizeof(*prop->src_dpn_prop), GFP_KERNEL);
 221         if (!prop->src_dpn_prop)
 222                 return -ENOMEM;
 223
 224         i = 0;
 225         dpn = prop->src_dpn_prop;
 226         addr = prop->source_ports;
 227         for_each_set_bit(bit, &addr, 32) {
 228                 dpn[i].num = bit;
 229                 dpn[i].type = SDW_DPN_FULL;
 230                 dpn[i].simple_ch_prep_sm = true;
 231                 dpn[i].ch_prep_timeout = 10;
 232                 i++;
 233         }
 234
 235         /* do this again for sink now */
 236         nval = hweight32(prop->sink_ports);
 237         prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
 238                 sizeof(*prop->sink_dpn_prop), GFP_KERNEL);
 239         if (!prop->sink_dpn_prop)
 240                 return -ENOMEM;
 241
 242         j = 0;
 243         dpn = prop->sink_dpn_prop;
 244         addr = prop->sink_ports;
 245         for_each_set_bit(bit, &addr, 32) {
 246                 dpn[j].num = bit;
 247                 dpn[j].type = SDW_DPN_FULL;
 248                 dpn[j].simple_ch_prep_sm = true;
 249                 dpn[j].ch_prep_timeout = 10;
 250                 j++;
 251         }
 252
 253         /* set the timeout values */
 254         prop->clk_stop_timeout = 200;
 255
 256         /* wake-up event */
 257         prop->wake_capable = 1;
 258
 259         return 0;
 260 }
 261
 262 static int rt722_sdca_interrupt_callback(struct sdw_slave *slave,
 263                                         struct sdw_slave_intr_status *status)
 264 {
 265         struct rt722_sdca_priv *rt722 = dev_get_drvdata(&slave->dev);
 266         int ret, stat;
 267         int count = 0, retry = 3;
 268         unsigned int sdca_cascade, scp_sdca_stat1, scp_sdca_stat2 = 0;
 269
 270         if (cancel_delayed_work_sync(&rt722->jack_detect_work)) {
 271                 dev_warn(&slave->dev, "%s the pending delayed_work was cancelled", __func__);
 272                 /* avoid the HID owner doesn't change to device */
 273                 if (rt722->scp_sdca_stat2)
 274                         scp_sdca_stat2 = rt722->scp_sdca_stat2;
 275         }
 276
 277         /*
 278          * The critical section below intentionally protects a rather large piece of code.
 279          * We don't want to allow the system suspend to disable an interrupt while we are
 280          * processing it, which could be problematic given the quirky SoundWire interrupt
 281          * scheme. We do want however to prevent new workqueues from being scheduled if
 282          * the disable_irq flag was set during system suspend.
 283          */
 284         mutex_lock(&rt722->disable_irq_lock);
 285
 286         ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT1);
 287         if (ret < 0)
 288                 goto io_error;
 289         rt722->scp_sdca_stat1 = ret;
 290         ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT2);
 291         if (ret < 0)
 292                 goto io_error;
 293         rt722->scp_sdca_stat2 = ret;
 294         if (scp_sdca_stat2)
 295                 rt722->scp_sdca_stat2 |= scp_sdca_stat2;
 296         do {
 297                 /* clear flag */
 298                 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT1);
 299                 if (ret < 0)
 300                         goto io_error;
 301                 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_0) {
 302                         ret = sdw_update_no_pm(rt722->slave, SDW_SCP_SDCA_INT1,
 303                                 SDW_SCP_SDCA_INT_SDCA_0, SDW_SCP_SDCA_INT_SDCA_0);
 304                         if (ret < 0)
 305                                 goto io_error;
 306                 } else if (ret & SDW_SCP_SDCA_INTMASK_SDCA_6) {
 307                         ret = sdw_update_no_pm(rt722->slave, SDW_SCP_SDCA_INT1,
 308                                 SDW_SCP_SDCA_INT_SDCA_6, SDW_SCP_SDCA_INT_SDCA_6);
 309                         if (ret < 0)
 310                                 goto io_error;
 311                 }
 312                 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT2);
 313                 if (ret < 0)
 314                         goto io_error;
 315                 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_8) {
 316                         ret = sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INT2,
 317                                                 SDW_SCP_SDCA_INTMASK_SDCA_8);
 318                         if (ret < 0)
 319                                 goto io_error;
 320                 }
 321
 322                 /* check if flag clear or not */
 323                 ret = sdw_read_no_pm(rt722->slave, SDW_DP0_INT);
 324                 if (ret < 0)
 325                         goto io_error;
 326                 sdca_cascade = ret & SDW_DP0_SDCA_CASCADE;
 327
 328                 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT1);
 329                 if (ret < 0)
 330                         goto io_error;
 331                 scp_sdca_stat1 = ret & SDW_SCP_SDCA_INTMASK_SDCA_0;
 332
 333                 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT2);
 334                 if (ret < 0)
 335                         goto io_error;
 336                 scp_sdca_stat2 = ret & SDW_SCP_SDCA_INTMASK_SDCA_8;
 337
 338                 stat = scp_sdca_stat1 || scp_sdca_stat2 || sdca_cascade;
 339
 340                 count++;
 341         } while (stat != 0 && count < retry);
 342
 343         if (stat)
 344                 dev_warn(&slave->dev,
 345                         "%s scp_sdca_stat1=0x%x, scp_sdca_stat2=0x%x\n", __func__,
 346                         rt722->scp_sdca_stat1, rt722->scp_sdca_stat2);
 347
 348         if (status->sdca_cascade && !rt722->disable_irq)
 349                 mod_delayed_work(system_power_efficient_wq,
 350                         &rt722->jack_detect_work, msecs_to_jiffies(30));
 351
 352         mutex_unlock(&rt722->disable_irq_lock);
 353
 354         return 0;
 355
 356 io_error:
 357         mutex_unlock(&rt722->disable_irq_lock);
 358         pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret);
 359         return ret;
 360 }
 361
 362 static struct sdw_slave_ops rt722_sdca_slave_ops = {
 363         .read_prop = rt722_sdca_read_prop,
 364         .interrupt_callback = rt722_sdca_interrupt_callback,
 365         .update_status = rt722_sdca_update_status,
 366 };
 367
 368 static int rt722_sdca_sdw_probe(struct sdw_slave *slave,
 369                                 const struct sdw_device_id *id)
 370 {
 371         struct regmap *regmap, *mbq_regmap;
 372
 373         /* Regmap Initialization */
 374         mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt722_sdca_mbq_regmap);
 375         if (IS_ERR(mbq_regmap))
 376                 return PTR_ERR(mbq_regmap);
 377
 378         regmap = devm_regmap_init_sdw(slave, &rt722_sdca_regmap);
 379         if (IS_ERR(regmap))
 380                 return PTR_ERR(regmap);
 381
 382         return rt722_sdca_init(&slave->dev, regmap, mbq_regmap, slave);
 383 }
 384
 385 static int rt722_sdca_sdw_remove(struct sdw_slave *slave)
 386 {
 387         struct rt722_sdca_priv *rt722 = dev_get_drvdata(&slave->dev);
 388
 389         if (rt722->hw_init) {
 390                 cancel_delayed_work_sync(&rt722->jack_detect_work);
 391                 cancel_delayed_work_sync(&rt722->jack_btn_check_work);
 392         }
 393
 394         if (rt722->first_hw_init)
 395                 pm_runtime_disable(&slave->dev);
 396
 397         mutex_destroy(&rt722->calibrate_mutex);
 398         mutex_destroy(&rt722->disable_irq_lock);
 399
 400         return 0;
 401 }
 402
 403 static const struct sdw_device_id rt722_sdca_id[] = {
 404         SDW_SLAVE_ENTRY_EXT(0x025d, 0x722, 0x3, 0x1, 0),
 405         {},
 406 };
 407 MODULE_DEVICE_TABLE(sdw, rt722_sdca_id);
 408
 409 static int __maybe_unused rt722_sdca_dev_suspend(struct device *dev)
 410 {
 411         struct rt722_sdca_priv *rt722 = dev_get_drvdata(dev);
 412
 413         if (!rt722->hw_init)
 414                 return 0;
 415
 416         cancel_delayed_work_sync(&rt722->jack_detect_work);
 417         cancel_delayed_work_sync(&rt722->jack_btn_check_work);
 418
 419         regcache_cache_only(rt722->regmap, true);
 420         regcache_cache_only(rt722->mbq_regmap, true);
 421
 422         return 0;
 423 }
 424
 425 static int __maybe_unused rt722_sdca_dev_system_suspend(struct device *dev)
 426 {
 427         struct rt722_sdca_priv *rt722_sdca = dev_get_drvdata(dev);
 428         struct sdw_slave *slave = dev_to_sdw_dev(dev);
 429         int ret1, ret2;
 430
 431         if (!rt722_sdca->hw_init)
 432                 return 0;
 433
 434         /*
 435          * prevent new interrupts from being handled after the
 436          * deferred work completes and before the parent disables
 437          * interrupts on the link
 438          */
 439         mutex_lock(&rt722_sdca->disable_irq_lock);
 440         rt722_sdca->disable_irq = true;
 441         ret1 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK1,
 442                                 SDW_SCP_SDCA_INTMASK_SDCA_0 | SDW_SCP_SDCA_INTMASK_SDCA_6, 0);
 443         ret2 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK2,
 444                                 SDW_SCP_SDCA_INTMASK_SDCA_8, 0);
 445         mutex_unlock(&rt722_sdca->disable_irq_lock);
 446
 447         if (ret1 < 0 || ret2 < 0) {
 448                 /* log but don't prevent suspend from happening */
 449                 dev_dbg(&slave->dev, "%s: could not disable SDCA interrupts\n:", __func__);
 450         }
 451
 452         return rt722_sdca_dev_suspend(dev);
 453 }
 454
 455 #define RT722_PROBE_TIMEOUT 5000
 456
 457 static int __maybe_unused rt722_sdca_dev_resume(struct device *dev)
 458 {
 459         struct sdw_slave *slave = dev_to_sdw_dev(dev);
 460         struct rt722_sdca_priv *rt722 = dev_get_drvdata(dev);
 461         unsigned long time;
 462
 463         if (!rt722->first_hw_init)
 464                 return 0;
 465
 466         if (!slave->unattach_request) {
 467                 if (rt722->disable_irq == true) {
 468                         mutex_lock(&rt722->disable_irq_lock);
 469                         sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK1, SDW_SCP_SDCA_INTMASK_SDCA_6);
 470                         sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK2, SDW_SCP_SDCA_INTMASK_SDCA_8);
 471                         rt722->disable_irq = false;
 472                         mutex_unlock(&rt722->disable_irq_lock);
 473                 }
 474                 goto regmap_sync;
 475         }
 476
 477         time = wait_for_completion_timeout(&slave->initialization_complete,
 478                                 msecs_to_jiffies(RT722_PROBE_TIMEOUT));
 479         if (!time) {
 480                 dev_err(&slave->dev, "Initialization not complete, timed out\n");
 481                 sdw_show_ping_status(slave->bus, true);
 482
 483                 return -ETIMEDOUT;
 484         }
 485
 486 regmap_sync:
 487         slave->unattach_request = 0;
 488         regcache_cache_only(rt722->regmap, false);
 489         regcache_sync(rt722->regmap);
 490         regcache_cache_only(rt722->mbq_regmap, false);
 491         regcache_sync(rt722->mbq_regmap);
 492         return 0;
 493 }
 494
 495 static const struct dev_pm_ops rt722_sdca_pm = {
 496         SET_SYSTEM_SLEEP_PM_OPS(rt722_sdca_dev_system_suspend, rt722_sdca_dev_resume)
 497         SET_RUNTIME_PM_OPS(rt722_sdca_dev_suspend, rt722_sdca_dev_resume, NULL)
 498 };
 499
 500 static struct sdw_driver rt722_sdca_sdw_driver = {
 501         .driver = {
 502                 .name = "rt722-sdca",
 503                 .owner = THIS_MODULE,
 504                 .pm = &rt722_sdca_pm,
 505         },
 506         .probe = rt722_sdca_sdw_probe,
 507         .remove = rt722_sdca_sdw_remove,
 508         .ops = &rt722_sdca_slave_ops,
 509         .id_table = rt722_sdca_id,
 510 };
 511 module_sdw_driver(rt722_sdca_sdw_driver);
 512
 513 MODULE_DESCRIPTION("ASoC RT722 SDCA SDW driver");
 514 MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>");
 515 MODULE_LICENSE("GPL");