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 19static 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 41static 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 58static 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 116static 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 134static 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 147static 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 161static 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 195static 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 262static 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 356io_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 362static 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 368static 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 385static 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 403static const struct sdw_device_id rt722_sdca_id[] = { 404 SDW_SLAVE_ENTRY_EXT(0x025d, 0x722, 0x3, 0x1, 0), 405 {}, 406}; 407MODULE_DEVICE_TABLE(sdw, rt722_sdca_id); 408 409static 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 425static 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 457static 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 486regmap_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 495static 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 500static 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}; 511module_sdw_driver(rt722_sdca_sdw_driver); 512 513MODULE_DESCRIPTION("ASoC RT722 SDCA SDW driver"); 514MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>"); 515MODULE_LICENSE("GPL"); 516