1// SPDX-License-Identifier: GPL-2.0-only 2// 3// rt712-sdca-sdw.c -- rt712 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/mod_devicetable.h> 12#include <linux/module.h> 13#include <linux/pm_runtime.h> 14#include <linux/soundwire/sdw_registers.h> 15#include "rt712-sdca.h" 16#include "rt712-sdca-sdw.h" 17 18static bool rt712_sdca_readable_register(struct device *dev, unsigned int reg) 19{ 20 switch (reg) { 21 case 0x201a ... 0x201f: 22 case 0x2029 ... 0x202a: 23 case 0x202d ... 0x2034: 24 case 0x2230 ... 0x2232: 25 case 0x2f01 ... 0x2f0a: 26 case 0x2f35 ... 0x2f36: 27 case 0x2f50: 28 case 0x2f54: 29 case 0x2f58 ... 0x2f5d: 30 case 0x3201: 31 case 0x320c: 32 case 0x3301 ... 0x3303: 33 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_GE49, RT712_SDCA_CTL_SELECTED_MODE, 0): 34 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_GE49, RT712_SDCA_CTL_DETECTED_MODE, 0): 35 case SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_CURRENT_OWNER, 0) ... 36 SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0): 37 case RT712_BUF_ADDR_HID1 ... RT712_BUF_ADDR_HID2: 38 return true; 39 default: 40 return false; 41 } 42} 43 44static bool rt712_sdca_volatile_register(struct device *dev, unsigned int reg) 45{ 46 switch (reg) { 47 case 0x201b: 48 case 0x201c: 49 case 0x201d: 50 case 0x201f: 51 case 0x202d ... 0x202f: 52 case 0x2230: 53 case 0x2f01: 54 case 0x2f35: 55 case 0x320c: 56 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_GE49, RT712_SDCA_CTL_DETECTED_MODE, 0): 57 case SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_CURRENT_OWNER, 0) ... 58 SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0): 59 case RT712_BUF_ADDR_HID1 ... RT712_BUF_ADDR_HID2: 60 return true; 61 default: 62 return false; 63 } 64} 65 66static bool rt712_sdca_mbq_readable_register(struct device *dev, unsigned int reg) 67{ 68 switch (reg) { 69 case 0x2000000 ... 0x200008e: 70 case 0x5300000 ... 0x530000e: 71 case 0x5400000 ... 0x540000e: 72 case 0x5600000 ... 0x5600008: 73 case 0x5700000 ... 0x570000d: 74 case 0x5800000 ... 0x5800021: 75 case 0x5900000 ... 0x5900028: 76 case 0x5a00000 ... 0x5a00009: 77 case 0x5b00000 ... 0x5b00051: 78 case 0x5c00000 ... 0x5c0009a: 79 case 0x5d00000 ... 0x5d00009: 80 case 0x5f00000 ... 0x5f00030: 81 case 0x6100000 ... 0x6100068: 82 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU05, RT712_SDCA_CTL_FU_VOLUME, CH_L): 83 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU05, RT712_SDCA_CTL_FU_VOLUME, CH_R): 84 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU0F, RT712_SDCA_CTL_FU_VOLUME, CH_L): 85 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU0F, RT712_SDCA_CTL_FU_VOLUME, CH_R): 86 case SDW_SDCA_CTL(FUNC_NUM_AMP, RT712_SDCA_ENT_USER_FU06, RT712_SDCA_CTL_FU_VOLUME, CH_L): 87 case SDW_SDCA_CTL(FUNC_NUM_AMP, RT712_SDCA_ENT_USER_FU06, RT712_SDCA_CTL_FU_VOLUME, CH_R): 88 return true; 89 default: 90 return false; 91 } 92} 93 94static bool rt712_sdca_mbq_volatile_register(struct device *dev, unsigned int reg) 95{ 96 switch (reg) { 97 case 0x2000000: 98 case 0x200001a: 99 case 0x2000024: 100 case 0x2000046: 101 case 0x200008a: 102 case 0x5800000: 103 case 0x5800001: 104 case 0x6100008: 105 return true; 106 default: 107 return false; 108 } 109} 110 111static const struct regmap_config rt712_sdca_regmap = { 112 .reg_bits = 32, 113 .val_bits = 8, 114 .readable_reg = rt712_sdca_readable_register, 115 .volatile_reg = rt712_sdca_volatile_register, 116 .max_register = 0x44ffffff, 117 .reg_defaults = rt712_sdca_reg_defaults, 118 .num_reg_defaults = ARRAY_SIZE(rt712_sdca_reg_defaults), 119 .cache_type = REGCACHE_MAPLE, 120 .use_single_read = true, 121 .use_single_write = true, 122}; 123 124static const struct regmap_config rt712_sdca_mbq_regmap = { 125 .name = "sdw-mbq", 126 .reg_bits = 32, 127 .val_bits = 16, 128 .readable_reg = rt712_sdca_mbq_readable_register, 129 .volatile_reg = rt712_sdca_mbq_volatile_register, 130 .max_register = 0x41000312, 131 .reg_defaults = rt712_sdca_mbq_defaults, 132 .num_reg_defaults = ARRAY_SIZE(rt712_sdca_mbq_defaults), 133 .cache_type = REGCACHE_MAPLE, 134 .use_single_read = true, 135 .use_single_write = true, 136}; 137 138static int rt712_sdca_update_status(struct sdw_slave *slave, 139 enum sdw_slave_status status) 140{ 141 struct rt712_sdca_priv *rt712 = dev_get_drvdata(&slave->dev); 142 143 if (status == SDW_SLAVE_UNATTACHED) 144 rt712->hw_init = false; 145 146 if (status == SDW_SLAVE_ATTACHED) { 147 if (rt712->hs_jack) { 148 /* 149 * Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then 150 * if the device attached again, we will need to set the setting back. 151 * It could avoid losing the jack detection interrupt. 152 * This also could sync with the cache value as the rt712_sdca_jack_init set. 153 */ 154 sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INTMASK1, 155 SDW_SCP_SDCA_INTMASK_SDCA_0); 156 sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INTMASK2, 157 SDW_SCP_SDCA_INTMASK_SDCA_8); 158 } 159 } 160 161 /* 162 * Perform initialization only if slave status is present and 163 * hw_init flag is false 164 */ 165 if (rt712->hw_init || status != SDW_SLAVE_ATTACHED) 166 return 0; 167 168 /* perform I/O transfers required for Slave initialization */ 169 return rt712_sdca_io_init(&slave->dev, slave); 170} 171 172static int rt712_sdca_read_prop(struct sdw_slave *slave) 173{ 174 struct sdw_slave_prop *prop = &slave->prop; 175 int nval; 176 int i, j; 177 u32 bit; 178 unsigned long addr; 179 struct sdw_dpn_prop *dpn; 180 181 prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY; 182 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY; 183 184 prop->paging_support = true; 185 186 /* first we need to allocate memory for set bits in port lists */ 187 prop->source_ports = BIT(4); /* BITMAP: 00010000 */ 188 prop->sink_ports = BIT(3) | BIT(1); /* BITMAP: 00001010 */ 189 190 nval = hweight32(prop->source_ports); 191 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval, 192 sizeof(*prop->src_dpn_prop), GFP_KERNEL); 193 if (!prop->src_dpn_prop) 194 return -ENOMEM; 195 196 i = 0; 197 dpn = prop->src_dpn_prop; 198 addr = prop->source_ports; 199 for_each_set_bit(bit, &addr, 32) { 200 dpn[i].num = bit; 201 dpn[i].type = SDW_DPN_FULL; 202 dpn[i].simple_ch_prep_sm = true; 203 dpn[i].ch_prep_timeout = 10; 204 i++; 205 } 206 207 /* do this again for sink now */ 208 nval = hweight32(prop->sink_ports); 209 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval, 210 sizeof(*prop->sink_dpn_prop), GFP_KERNEL); 211 if (!prop->sink_dpn_prop) 212 return -ENOMEM; 213 214 j = 0; 215 dpn = prop->sink_dpn_prop; 216 addr = prop->sink_ports; 217 for_each_set_bit(bit, &addr, 32) { 218 dpn[j].num = bit; 219 dpn[j].type = SDW_DPN_FULL; 220 dpn[j].simple_ch_prep_sm = true; 221 dpn[j].ch_prep_timeout = 10; 222 j++; 223 } 224 225 /* set the timeout values */ 226 prop->clk_stop_timeout = 1380; 227 228 /* wake-up event */ 229 prop->wake_capable = 1; 230 231 return 0; 232} 233 234static int rt712_sdca_interrupt_callback(struct sdw_slave *slave, 235 struct sdw_slave_intr_status *status) 236{ 237 struct rt712_sdca_priv *rt712 = dev_get_drvdata(&slave->dev); 238 int ret, stat; 239 int count = 0, retry = 3; 240 unsigned int sdca_cascade, scp_sdca_stat1, scp_sdca_stat2 = 0; 241 242 dev_dbg(&slave->dev, 243 "%s control_port_stat=%x, sdca_cascade=%x", __func__, 244 status->control_port, status->sdca_cascade); 245 246 if (cancel_delayed_work_sync(&rt712->jack_detect_work)) { 247 dev_warn(&slave->dev, "%s the pending delayed_work was cancelled", __func__); 248 /* avoid the HID owner doesn't change to device */ 249 if (rt712->scp_sdca_stat2) 250 scp_sdca_stat2 = rt712->scp_sdca_stat2; 251 } 252 253 /* 254 * The critical section below intentionally protects a rather large piece of code. 255 * We don't want to allow the system suspend to disable an interrupt while we are 256 * processing it, which could be problematic given the quirky SoundWire interrupt 257 * scheme. We do want however to prevent new workqueues from being scheduled if 258 * the disable_irq flag was set during system suspend. 259 */ 260 mutex_lock(&rt712->disable_irq_lock); 261 262 ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT1); 263 if (ret < 0) 264 goto io_error; 265 rt712->scp_sdca_stat1 = ret; 266 ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT2); 267 if (ret < 0) 268 goto io_error; 269 rt712->scp_sdca_stat2 = ret; 270 if (scp_sdca_stat2) 271 rt712->scp_sdca_stat2 |= scp_sdca_stat2; 272 273 do { 274 /* clear flag */ 275 ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT1); 276 if (ret < 0) 277 goto io_error; 278 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_0) { 279 ret = sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INT1, 280 SDW_SCP_SDCA_INTMASK_SDCA_0); 281 if (ret < 0) 282 goto io_error; 283 } 284 ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT2); 285 if (ret < 0) 286 goto io_error; 287 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_8) { 288 ret = sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INT2, 289 SDW_SCP_SDCA_INTMASK_SDCA_8); 290 if (ret < 0) 291 goto io_error; 292 } 293 294 /* check if flag clear or not */ 295 ret = sdw_read_no_pm(rt712->slave, SDW_DP0_INT); 296 if (ret < 0) 297 goto io_error; 298 sdca_cascade = ret & SDW_DP0_SDCA_CASCADE; 299 300 ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT1); 301 if (ret < 0) 302 goto io_error; 303 scp_sdca_stat1 = ret & SDW_SCP_SDCA_INTMASK_SDCA_0; 304 305 ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT2); 306 if (ret < 0) 307 goto io_error; 308 scp_sdca_stat2 = ret & SDW_SCP_SDCA_INTMASK_SDCA_8; 309 310 stat = scp_sdca_stat1 || scp_sdca_stat2 || sdca_cascade; 311 312 count++; 313 } while (stat != 0 && count < retry); 314 315 if (stat) 316 dev_warn(&slave->dev, 317 "%s scp_sdca_stat1=0x%x, scp_sdca_stat2=0x%x\n", __func__, 318 rt712->scp_sdca_stat1, rt712->scp_sdca_stat2); 319 320 if (status->sdca_cascade && !rt712->disable_irq) 321 mod_delayed_work(system_power_efficient_wq, 322 &rt712->jack_detect_work, msecs_to_jiffies(30)); 323 324 mutex_unlock(&rt712->disable_irq_lock); 325 326 return 0; 327 328io_error: 329 mutex_unlock(&rt712->disable_irq_lock); 330 pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret); 331 return ret; 332} 333 334static const struct sdw_slave_ops rt712_sdca_slave_ops = { 335 .read_prop = rt712_sdca_read_prop, 336 .interrupt_callback = rt712_sdca_interrupt_callback, 337 .update_status = rt712_sdca_update_status, 338}; 339 340static int rt712_sdca_sdw_probe(struct sdw_slave *slave, 341 const struct sdw_device_id *id) 342{ 343 struct regmap *regmap, *mbq_regmap; 344 345 /* Regmap Initialization */ 346 mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt712_sdca_mbq_regmap); 347 if (IS_ERR(mbq_regmap)) 348 return PTR_ERR(mbq_regmap); 349 350 regmap = devm_regmap_init_sdw(slave, &rt712_sdca_regmap); 351 if (IS_ERR(regmap)) 352 return PTR_ERR(regmap); 353 354 return rt712_sdca_init(&slave->dev, regmap, mbq_regmap, slave); 355} 356 357static int rt712_sdca_sdw_remove(struct sdw_slave *slave) 358{ 359 struct rt712_sdca_priv *rt712 = dev_get_drvdata(&slave->dev); 360 361 if (rt712->hw_init) { 362 cancel_delayed_work_sync(&rt712->jack_detect_work); 363 cancel_delayed_work_sync(&rt712->jack_btn_check_work); 364 } 365 366 pm_runtime_disable(&slave->dev); 367 368 mutex_destroy(&rt712->calibrate_mutex); 369 mutex_destroy(&rt712->disable_irq_lock); 370 371 return 0; 372} 373 374static const struct sdw_device_id rt712_sdca_id[] = { 375 SDW_SLAVE_ENTRY_EXT(0x025d, 0x712, 0x3, 0x1, 0), 376 SDW_SLAVE_ENTRY_EXT(0x025d, 0x713, 0x3, 0x1, 0), 377 SDW_SLAVE_ENTRY_EXT(0x025d, 0x716, 0x3, 0x1, 0), 378 SDW_SLAVE_ENTRY_EXT(0x025d, 0x717, 0x3, 0x1, 0), 379 {}, 380}; 381MODULE_DEVICE_TABLE(sdw, rt712_sdca_id); 382 383static int __maybe_unused rt712_sdca_dev_suspend(struct device *dev) 384{ 385 struct rt712_sdca_priv *rt712 = dev_get_drvdata(dev); 386 387 if (!rt712->hw_init) 388 return 0; 389 390 cancel_delayed_work_sync(&rt712->jack_detect_work); 391 cancel_delayed_work_sync(&rt712->jack_btn_check_work); 392 393 regcache_cache_only(rt712->regmap, true); 394 regcache_cache_only(rt712->mbq_regmap, true); 395 396 return 0; 397} 398 399static int __maybe_unused rt712_sdca_dev_system_suspend(struct device *dev) 400{ 401 struct rt712_sdca_priv *rt712_sdca = dev_get_drvdata(dev); 402 struct sdw_slave *slave = dev_to_sdw_dev(dev); 403 int ret1, ret2; 404 405 if (!rt712_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(&rt712_sdca->disable_irq_lock); 414 rt712_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(&rt712_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 rt712_sdca_dev_suspend(dev); 427} 428 429#define RT712_PROBE_TIMEOUT 5000 430 431static int __maybe_unused rt712_sdca_dev_resume(struct device *dev) 432{ 433 struct sdw_slave *slave = dev_to_sdw_dev(dev); 434 struct rt712_sdca_priv *rt712 = dev_get_drvdata(dev); 435 unsigned long time; 436 437 if (!rt712->first_hw_init) 438 return 0; 439 440 if (!slave->unattach_request) { 441 mutex_lock(&rt712->disable_irq_lock); 442 if (rt712->disable_irq == true) { 443 444 sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK1, SDW_SCP_SDCA_INTMASK_SDCA_0); 445 sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK2, SDW_SCP_SDCA_INTMASK_SDCA_8); 446 rt712->disable_irq = false; 447 } 448 mutex_unlock(&rt712->disable_irq_lock); 449 goto regmap_sync; 450 } 451 452 time = wait_for_completion_timeout(&slave->initialization_complete, 453 msecs_to_jiffies(RT712_PROBE_TIMEOUT)); 454 if (!time) { 455 dev_err(&slave->dev, "%s: Initialization not complete, timed out\n", __func__); 456 sdw_show_ping_status(slave->bus, true); 457 458 return -ETIMEDOUT; 459 } 460 461regmap_sync: 462 slave->unattach_request = 0; 463 regcache_cache_only(rt712->regmap, false); 464 regcache_sync(rt712->regmap); 465 regcache_cache_only(rt712->mbq_regmap, false); 466 regcache_sync(rt712->mbq_regmap); 467 return 0; 468} 469 470static const struct dev_pm_ops rt712_sdca_pm = { 471 SET_SYSTEM_SLEEP_PM_OPS(rt712_sdca_dev_system_suspend, rt712_sdca_dev_resume) 472 SET_RUNTIME_PM_OPS(rt712_sdca_dev_suspend, rt712_sdca_dev_resume, NULL) 473}; 474 475static struct sdw_driver rt712_sdca_sdw_driver = { 476 .driver = { 477 .name = "rt712-sdca", 478 .owner = THIS_MODULE, 479 .pm = &rt712_sdca_pm, 480 }, 481 .probe = rt712_sdca_sdw_probe, 482 .remove = rt712_sdca_sdw_remove, 483 .ops = &rt712_sdca_slave_ops, 484 .id_table = rt712_sdca_id, 485}; 486module_sdw_driver(rt712_sdca_sdw_driver); 487 488MODULE_DESCRIPTION("ASoC RT712 SDCA SDW driver"); 489MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>"); 490MODULE_LICENSE("GPL"); 491