1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) 2 // Copyright(c) 2015-17 Intel Corporation. 3 4 /* 5 * Soundwire Intel Master Driver 6 */ 7 8 #include <linux/acpi.h> 9 #include <linux/debugfs.h> 10 #include <linux/delay.h> 11 #include <linux/module.h> 12 #include <linux/interrupt.h> 13 #include <linux/io.h> 14 #include <linux/platform_device.h> 15 #include <sound/pcm_params.h> 16 #include <linux/pm_runtime.h> 17 #include <sound/soc.h> 18 #include <linux/soundwire/sdw_registers.h> 19 #include <linux/soundwire/sdw.h> 20 #include <linux/soundwire/sdw_intel.h> 21 #include "cadence_master.h" 22 #include "bus.h" 23 #include "intel.h" 24 25 #define INTEL_MASTER_SUSPEND_DELAY_MS 3000 26 27 /* 28 * debug/config flags for the Intel SoundWire Master. 29 * 30 * Since we may have multiple masters active, we can have up to 8 31 * flags reused in each byte, with master0 using the ls-byte, etc. 32 */ 33 34 #define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME BIT(0) 35 #define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP BIT(1) 36 #define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE BIT(2) 37 #define SDW_INTEL_MASTER_DISABLE_MULTI_LINK BIT(3) 38 39 static int md_flags; 40 module_param_named(sdw_md_flags, md_flags, int, 0444); 41 MODULE_PARM_DESC(sdw_md_flags, "SoundWire Intel Master device flags (0x0 all off)"); 42 43 /* Intel SHIM Registers Definition */ 44 #define SDW_SHIM_LCAP 0x0 45 #define SDW_SHIM_LCTL 0x4 46 #define SDW_SHIM_IPPTR 0x8 47 #define SDW_SHIM_SYNC 0xC 48 49 #define SDW_SHIM_CTLSCAP(x) (0x010 + 0x60 * (x)) 50 #define SDW_SHIM_CTLS0CM(x) (0x012 + 0x60 * (x)) 51 #define SDW_SHIM_CTLS1CM(x) (0x014 + 0x60 * (x)) 52 #define SDW_SHIM_CTLS2CM(x) (0x016 + 0x60 * (x)) 53 #define SDW_SHIM_CTLS3CM(x) (0x018 + 0x60 * (x)) 54 #define SDW_SHIM_PCMSCAP(x) (0x020 + 0x60 * (x)) 55 56 #define SDW_SHIM_PCMSYCHM(x, y) (0x022 + (0x60 * (x)) + (0x2 * (y))) 57 #define SDW_SHIM_PCMSYCHC(x, y) (0x042 + (0x60 * (x)) + (0x2 * (y))) 58 #define SDW_SHIM_PDMSCAP(x) (0x062 + 0x60 * (x)) 59 #define SDW_SHIM_IOCTL(x) (0x06C + 0x60 * (x)) 60 #define SDW_SHIM_CTMCTL(x) (0x06E + 0x60 * (x)) 61 62 #define SDW_SHIM_WAKEEN 0x190 63 #define SDW_SHIM_WAKESTS 0x192 64 65 #define SDW_SHIM_LCTL_SPA BIT(0) 66 #define SDW_SHIM_LCTL_SPA_MASK GENMASK(3, 0) 67 #define SDW_SHIM_LCTL_CPA BIT(8) 68 #define SDW_SHIM_LCTL_CPA_MASK GENMASK(11, 8) 69 70 #define SDW_SHIM_SYNC_SYNCPRD_VAL_24 (24000 / SDW_CADENCE_GSYNC_KHZ - 1) 71 #define SDW_SHIM_SYNC_SYNCPRD_VAL_38_4 (38400 / SDW_CADENCE_GSYNC_KHZ - 1) 72 #define SDW_SHIM_SYNC_SYNCPRD GENMASK(14, 0) 73 #define SDW_SHIM_SYNC_SYNCCPU BIT(15) 74 #define SDW_SHIM_SYNC_CMDSYNC_MASK GENMASK(19, 16) 75 #define SDW_SHIM_SYNC_CMDSYNC BIT(16) 76 #define SDW_SHIM_SYNC_SYNCGO BIT(24) 77 78 #define SDW_SHIM_PCMSCAP_ISS GENMASK(3, 0) 79 #define SDW_SHIM_PCMSCAP_OSS GENMASK(7, 4) 80 #define SDW_SHIM_PCMSCAP_BSS GENMASK(12, 8) 81 82 #define SDW_SHIM_PCMSYCM_LCHN GENMASK(3, 0) 83 #define SDW_SHIM_PCMSYCM_HCHN GENMASK(7, 4) 84 #define SDW_SHIM_PCMSYCM_STREAM GENMASK(13, 8) 85 #define SDW_SHIM_PCMSYCM_DIR BIT(15) 86 87 #define SDW_SHIM_PDMSCAP_ISS GENMASK(3, 0) 88 #define SDW_SHIM_PDMSCAP_OSS GENMASK(7, 4) 89 #define SDW_SHIM_PDMSCAP_BSS GENMASK(12, 8) 90 #define SDW_SHIM_PDMSCAP_CPSS GENMASK(15, 13) 91 92 #define SDW_SHIM_IOCTL_MIF BIT(0) 93 #define SDW_SHIM_IOCTL_CO BIT(1) 94 #define SDW_SHIM_IOCTL_COE BIT(2) 95 #define SDW_SHIM_IOCTL_DO BIT(3) 96 #define SDW_SHIM_IOCTL_DOE BIT(4) 97 #define SDW_SHIM_IOCTL_BKE BIT(5) 98 #define SDW_SHIM_IOCTL_WPDD BIT(6) 99 #define SDW_SHIM_IOCTL_CIBD BIT(8) 100 #define SDW_SHIM_IOCTL_DIBD BIT(9) 101 102 #define SDW_SHIM_CTMCTL_DACTQE BIT(0) 103 #define SDW_SHIM_CTMCTL_DODS BIT(1) 104 #define SDW_SHIM_CTMCTL_DOAIS GENMASK(4, 3) 105 106 #define SDW_SHIM_WAKEEN_ENABLE BIT(0) 107 #define SDW_SHIM_WAKESTS_STATUS BIT(0) 108 109 /* Intel ALH Register definitions */ 110 #define SDW_ALH_STRMZCFG(x) (0x000 + (0x4 * (x))) 111 #define SDW_ALH_NUM_STREAMS 64 112 113 #define SDW_ALH_STRMZCFG_DMAT_VAL 0x3 114 #define SDW_ALH_STRMZCFG_DMAT GENMASK(7, 0) 115 #define SDW_ALH_STRMZCFG_CHN GENMASK(19, 16) 116 117 enum intel_pdi_type { 118 INTEL_PDI_IN = 0, 119 INTEL_PDI_OUT = 1, 120 INTEL_PDI_BD = 2, 121 }; 122 123 #define cdns_to_intel(_cdns) container_of(_cdns, struct sdw_intel, cdns) 124 125 /* 126 * Read, write helpers for HW registers 127 */ 128 static inline int intel_readl(void __iomem *base, int offset) 129 { 130 return readl(base + offset); 131 } 132 133 static inline void intel_writel(void __iomem *base, int offset, int value) 134 { 135 writel(value, base + offset); 136 } 137 138 static inline u16 intel_readw(void __iomem *base, int offset) 139 { 140 return readw(base + offset); 141 } 142 143 static inline void intel_writew(void __iomem *base, int offset, u16 value) 144 { 145 writew(value, base + offset); 146 } 147 148 static int intel_wait_bit(void __iomem *base, int offset, u32 mask, u32 target) 149 { 150 int timeout = 10; 151 u32 reg_read; 152 153 do { 154 reg_read = readl(base + offset); 155 if ((reg_read & mask) == target) 156 return 0; 157 158 timeout--; 159 usleep_range(50, 100); 160 } while (timeout != 0); 161 162 return -EAGAIN; 163 } 164 165 static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask) 166 { 167 writel(value, base + offset); 168 return intel_wait_bit(base, offset, mask, 0); 169 } 170 171 static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask) 172 { 173 writel(value, base + offset); 174 return intel_wait_bit(base, offset, mask, mask); 175 } 176 177 /* 178 * debugfs 179 */ 180 #ifdef CONFIG_DEBUG_FS 181 182 #define RD_BUF (2 * PAGE_SIZE) 183 184 static ssize_t intel_sprintf(void __iomem *mem, bool l, 185 char *buf, size_t pos, unsigned int reg) 186 { 187 int value; 188 189 if (l) 190 value = intel_readl(mem, reg); 191 else 192 value = intel_readw(mem, reg); 193 194 return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value); 195 } 196 197 static int intel_reg_show(struct seq_file *s_file, void *data) 198 { 199 struct sdw_intel *sdw = s_file->private; 200 void __iomem *s = sdw->link_res->shim; 201 void __iomem *a = sdw->link_res->alh; 202 char *buf; 203 ssize_t ret; 204 int i, j; 205 unsigned int links, reg; 206 207 buf = kzalloc(RD_BUF, GFP_KERNEL); 208 if (!buf) 209 return -ENOMEM; 210 211 links = intel_readl(s, SDW_SHIM_LCAP) & GENMASK(2, 0); 212 213 ret = scnprintf(buf, RD_BUF, "Register Value\n"); 214 ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n"); 215 216 for (i = 0; i < links; i++) { 217 reg = SDW_SHIM_LCAP + i * 4; 218 ret += intel_sprintf(s, true, buf, ret, reg); 219 } 220 221 for (i = 0; i < links; i++) { 222 ret += scnprintf(buf + ret, RD_BUF - ret, "\nLink%d\n", i); 223 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLSCAP(i)); 224 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS0CM(i)); 225 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS1CM(i)); 226 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS2CM(i)); 227 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS3CM(i)); 228 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PCMSCAP(i)); 229 230 ret += scnprintf(buf + ret, RD_BUF - ret, "\n PCMSyCH registers\n"); 231 232 /* 233 * the value 10 is the number of PDIs. We will need a 234 * cleanup to remove hard-coded Intel configurations 235 * from cadence_master.c 236 */ 237 for (j = 0; j < 10; j++) { 238 ret += intel_sprintf(s, false, buf, ret, 239 SDW_SHIM_PCMSYCHM(i, j)); 240 ret += intel_sprintf(s, false, buf, ret, 241 SDW_SHIM_PCMSYCHC(i, j)); 242 } 243 ret += scnprintf(buf + ret, RD_BUF - ret, "\n PDMSCAP, IOCTL, CTMCTL\n"); 244 245 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PDMSCAP(i)); 246 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i)); 247 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i)); 248 } 249 250 ret += scnprintf(buf + ret, RD_BUF - ret, "\nWake registers\n"); 251 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKEEN); 252 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKESTS); 253 254 ret += scnprintf(buf + ret, RD_BUF - ret, "\nALH STRMzCFG\n"); 255 for (i = 0; i < SDW_ALH_NUM_STREAMS; i++) 256 ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i)); 257 258 seq_printf(s_file, "%s", buf); 259 kfree(buf); 260 261 return 0; 262 } 263 DEFINE_SHOW_ATTRIBUTE(intel_reg); 264 265 static int intel_set_m_datamode(void *data, u64 value) 266 { 267 struct sdw_intel *sdw = data; 268 struct sdw_bus *bus = &sdw->cdns.bus; 269 270 if (value > SDW_PORT_DATA_MODE_STATIC_1) 271 return -EINVAL; 272 273 /* Userspace changed the hardware state behind the kernel's back */ 274 add_taint(TAINT_USER, LOCKDEP_STILL_OK); 275 276 bus->params.m_data_mode = value; 277 278 return 0; 279 } 280 DEFINE_DEBUGFS_ATTRIBUTE(intel_set_m_datamode_fops, NULL, 281 intel_set_m_datamode, "%llu\n"); 282 283 static int intel_set_s_datamode(void *data, u64 value) 284 { 285 struct sdw_intel *sdw = data; 286 struct sdw_bus *bus = &sdw->cdns.bus; 287 288 if (value > SDW_PORT_DATA_MODE_STATIC_1) 289 return -EINVAL; 290 291 /* Userspace changed the hardware state behind the kernel's back */ 292 add_taint(TAINT_USER, LOCKDEP_STILL_OK); 293 294 bus->params.s_data_mode = value; 295 296 return 0; 297 } 298 DEFINE_DEBUGFS_ATTRIBUTE(intel_set_s_datamode_fops, NULL, 299 intel_set_s_datamode, "%llu\n"); 300 301 static void intel_debugfs_init(struct sdw_intel *sdw) 302 { 303 struct dentry *root = sdw->cdns.bus.debugfs; 304 305 if (!root) 306 return; 307 308 sdw->debugfs = debugfs_create_dir("intel-sdw", root); 309 310 debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw, 311 &intel_reg_fops); 312 313 debugfs_create_file("intel-m-datamode", 0200, sdw->debugfs, sdw, 314 &intel_set_m_datamode_fops); 315 316 debugfs_create_file("intel-s-datamode", 0200, sdw->debugfs, sdw, 317 &intel_set_s_datamode_fops); 318 319 sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs); 320 } 321 322 static void intel_debugfs_exit(struct sdw_intel *sdw) 323 { 324 debugfs_remove_recursive(sdw->debugfs); 325 } 326 #else 327 static void intel_debugfs_init(struct sdw_intel *sdw) {} 328 static void intel_debugfs_exit(struct sdw_intel *sdw) {} 329 #endif /* CONFIG_DEBUG_FS */ 330 331 /* 332 * shim ops 333 */ 334 335 static int intel_link_power_up(struct sdw_intel *sdw) 336 { 337 unsigned int link_id = sdw->instance; 338 void __iomem *shim = sdw->link_res->shim; 339 u32 *shim_mask = sdw->link_res->shim_mask; 340 struct sdw_bus *bus = &sdw->cdns.bus; 341 struct sdw_master_prop *prop = &bus->prop; 342 u32 spa_mask, cpa_mask; 343 u32 link_control; 344 int ret = 0; 345 u32 syncprd; 346 u32 sync_reg; 347 348 mutex_lock(sdw->link_res->shim_lock); 349 350 /* 351 * The hardware relies on an internal counter, typically 4kHz, 352 * to generate the SoundWire SSP - which defines a 'safe' 353 * synchronization point between commands and audio transport 354 * and allows for multi link synchronization. The SYNCPRD value 355 * is only dependent on the oscillator clock provided to 356 * the IP, so adjust based on _DSD properties reported in DSDT 357 * tables. The values reported are based on either 24MHz 358 * (CNL/CML) or 38.4 MHz (ICL/TGL+). 359 */ 360 if (prop->mclk_freq % 6000000) 361 syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4; 362 else 363 syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24; 364 365 if (!*shim_mask) { 366 dev_dbg(sdw->cdns.dev, "%s: powering up all links\n", __func__); 367 368 /* we first need to program the SyncPRD/CPU registers */ 369 dev_dbg(sdw->cdns.dev, 370 "%s: first link up, programming SYNCPRD\n", __func__); 371 372 /* set SyncPRD period */ 373 sync_reg = intel_readl(shim, SDW_SHIM_SYNC); 374 u32p_replace_bits(&sync_reg, syncprd, SDW_SHIM_SYNC_SYNCPRD); 375 376 /* Set SyncCPU bit */ 377 sync_reg |= SDW_SHIM_SYNC_SYNCCPU; 378 intel_writel(shim, SDW_SHIM_SYNC, sync_reg); 379 380 /* Link power up sequence */ 381 link_control = intel_readl(shim, SDW_SHIM_LCTL); 382 383 /* only power-up enabled links */ 384 spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, sdw->link_res->link_mask); 385 cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask); 386 387 link_control |= spa_mask; 388 389 ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask); 390 if (ret < 0) { 391 dev_err(sdw->cdns.dev, "Failed to power up link: %d\n", ret); 392 goto out; 393 } 394 395 /* SyncCPU will change once link is active */ 396 ret = intel_wait_bit(shim, SDW_SHIM_SYNC, 397 SDW_SHIM_SYNC_SYNCCPU, 0); 398 if (ret < 0) { 399 dev_err(sdw->cdns.dev, 400 "Failed to set SHIM_SYNC: %d\n", ret); 401 goto out; 402 } 403 } 404 405 *shim_mask |= BIT(link_id); 406 407 sdw->cdns.link_up = true; 408 out: 409 mutex_unlock(sdw->link_res->shim_lock); 410 411 return ret; 412 } 413 414 /* this needs to be called with shim_lock */ 415 static void intel_shim_glue_to_master_ip(struct sdw_intel *sdw) 416 { 417 void __iomem *shim = sdw->link_res->shim; 418 unsigned int link_id = sdw->instance; 419 u16 ioctl; 420 421 /* Switch to MIP from Glue logic */ 422 ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id)); 423 424 ioctl &= ~(SDW_SHIM_IOCTL_DOE); 425 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 426 usleep_range(10, 15); 427 428 ioctl &= ~(SDW_SHIM_IOCTL_DO); 429 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 430 usleep_range(10, 15); 431 432 ioctl |= (SDW_SHIM_IOCTL_MIF); 433 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 434 usleep_range(10, 15); 435 436 ioctl &= ~(SDW_SHIM_IOCTL_BKE); 437 ioctl &= ~(SDW_SHIM_IOCTL_COE); 438 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 439 usleep_range(10, 15); 440 441 /* at this point Master IP has full control of the I/Os */ 442 } 443 444 /* this needs to be called with shim_lock */ 445 static void intel_shim_master_ip_to_glue(struct sdw_intel *sdw) 446 { 447 unsigned int link_id = sdw->instance; 448 void __iomem *shim = sdw->link_res->shim; 449 u16 ioctl; 450 451 /* Glue logic */ 452 ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id)); 453 ioctl |= SDW_SHIM_IOCTL_BKE; 454 ioctl |= SDW_SHIM_IOCTL_COE; 455 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 456 usleep_range(10, 15); 457 458 ioctl &= ~(SDW_SHIM_IOCTL_MIF); 459 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 460 usleep_range(10, 15); 461 462 /* at this point Integration Glue has full control of the I/Os */ 463 } 464 465 static int intel_shim_init(struct sdw_intel *sdw, bool clock_stop) 466 { 467 void __iomem *shim = sdw->link_res->shim; 468 unsigned int link_id = sdw->instance; 469 int ret = 0; 470 u16 ioctl = 0, act = 0; 471 472 mutex_lock(sdw->link_res->shim_lock); 473 474 /* Initialize Shim */ 475 ioctl |= SDW_SHIM_IOCTL_BKE; 476 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 477 usleep_range(10, 15); 478 479 ioctl |= SDW_SHIM_IOCTL_WPDD; 480 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 481 usleep_range(10, 15); 482 483 ioctl |= SDW_SHIM_IOCTL_DO; 484 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 485 usleep_range(10, 15); 486 487 ioctl |= SDW_SHIM_IOCTL_DOE; 488 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl); 489 usleep_range(10, 15); 490 491 intel_shim_glue_to_master_ip(sdw); 492 493 u16p_replace_bits(&act, 0x1, SDW_SHIM_CTMCTL_DOAIS); 494 act |= SDW_SHIM_CTMCTL_DACTQE; 495 act |= SDW_SHIM_CTMCTL_DODS; 496 intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act); 497 usleep_range(10, 15); 498 499 mutex_unlock(sdw->link_res->shim_lock); 500 501 return ret; 502 } 503 504 static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable) 505 { 506 void __iomem *shim = sdw->link_res->shim; 507 unsigned int link_id = sdw->instance; 508 u16 wake_en, wake_sts; 509 510 mutex_lock(sdw->link_res->shim_lock); 511 wake_en = intel_readw(shim, SDW_SHIM_WAKEEN); 512 513 if (wake_enable) { 514 /* Enable the wakeup */ 515 wake_en |= (SDW_SHIM_WAKEEN_ENABLE << link_id); 516 intel_writew(shim, SDW_SHIM_WAKEEN, wake_en); 517 } else { 518 /* Disable the wake up interrupt */ 519 wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id); 520 intel_writew(shim, SDW_SHIM_WAKEEN, wake_en); 521 522 /* Clear wake status */ 523 wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS); 524 wake_sts |= (SDW_SHIM_WAKEEN_ENABLE << link_id); 525 intel_writew(shim, SDW_SHIM_WAKESTS_STATUS, wake_sts); 526 } 527 mutex_unlock(sdw->link_res->shim_lock); 528 } 529 530 static int intel_link_power_down(struct sdw_intel *sdw) 531 { 532 u32 link_control, spa_mask, cpa_mask; 533 unsigned int link_id = sdw->instance; 534 void __iomem *shim = sdw->link_res->shim; 535 u32 *shim_mask = sdw->link_res->shim_mask; 536 int ret = 0; 537 538 mutex_lock(sdw->link_res->shim_lock); 539 540 intel_shim_master_ip_to_glue(sdw); 541 542 if (!(*shim_mask & BIT(link_id))) 543 dev_err(sdw->cdns.dev, 544 "%s: Unbalanced power-up/down calls\n", __func__); 545 546 *shim_mask &= ~BIT(link_id); 547 548 if (!*shim_mask) { 549 550 dev_dbg(sdw->cdns.dev, "%s: powering down all links\n", __func__); 551 552 /* Link power down sequence */ 553 link_control = intel_readl(shim, SDW_SHIM_LCTL); 554 555 /* only power-down enabled links */ 556 spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, ~sdw->link_res->link_mask); 557 cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask); 558 559 link_control &= spa_mask; 560 561 ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask); 562 } 563 564 link_control = intel_readl(shim, SDW_SHIM_LCTL); 565 566 mutex_unlock(sdw->link_res->shim_lock); 567 568 if (ret < 0) { 569 dev_err(sdw->cdns.dev, "%s: could not power down link\n", __func__); 570 571 return ret; 572 } 573 574 sdw->cdns.link_up = false; 575 return 0; 576 } 577 578 static void intel_shim_sync_arm(struct sdw_intel *sdw) 579 { 580 void __iomem *shim = sdw->link_res->shim; 581 u32 sync_reg; 582 583 mutex_lock(sdw->link_res->shim_lock); 584 585 /* update SYNC register */ 586 sync_reg = intel_readl(shim, SDW_SHIM_SYNC); 587 sync_reg |= (SDW_SHIM_SYNC_CMDSYNC << sdw->instance); 588 intel_writel(shim, SDW_SHIM_SYNC, sync_reg); 589 590 mutex_unlock(sdw->link_res->shim_lock); 591 } 592 593 static int intel_shim_sync_go_unlocked(struct sdw_intel *sdw) 594 { 595 void __iomem *shim = sdw->link_res->shim; 596 u32 sync_reg; 597 int ret; 598 599 /* Read SYNC register */ 600 sync_reg = intel_readl(shim, SDW_SHIM_SYNC); 601 602 /* 603 * Set SyncGO bit to synchronously trigger a bank switch for 604 * all the masters. A write to SYNCGO bit clears CMDSYNC bit for all 605 * the Masters. 606 */ 607 sync_reg |= SDW_SHIM_SYNC_SYNCGO; 608 609 ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg, 610 SDW_SHIM_SYNC_SYNCGO); 611 612 if (ret < 0) 613 dev_err(sdw->cdns.dev, "SyncGO clear failed: %d\n", ret); 614 615 return ret; 616 } 617 618 static int intel_shim_sync_go(struct sdw_intel *sdw) 619 { 620 int ret; 621 622 mutex_lock(sdw->link_res->shim_lock); 623 624 ret = intel_shim_sync_go_unlocked(sdw); 625 626 mutex_unlock(sdw->link_res->shim_lock); 627 628 return ret; 629 } 630 631 /* 632 * PDI routines 633 */ 634 static void intel_pdi_init(struct sdw_intel *sdw, 635 struct sdw_cdns_stream_config *config) 636 { 637 void __iomem *shim = sdw->link_res->shim; 638 unsigned int link_id = sdw->instance; 639 int pcm_cap, pdm_cap; 640 641 /* PCM Stream Capability */ 642 pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id)); 643 644 config->pcm_bd = FIELD_GET(SDW_SHIM_PCMSCAP_BSS, pcm_cap); 645 config->pcm_in = FIELD_GET(SDW_SHIM_PCMSCAP_ISS, pcm_cap); 646 config->pcm_out = FIELD_GET(SDW_SHIM_PCMSCAP_OSS, pcm_cap); 647 648 dev_dbg(sdw->cdns.dev, "PCM cap bd:%d in:%d out:%d\n", 649 config->pcm_bd, config->pcm_in, config->pcm_out); 650 651 /* PDM Stream Capability */ 652 pdm_cap = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id)); 653 654 config->pdm_bd = FIELD_GET(SDW_SHIM_PDMSCAP_BSS, pdm_cap); 655 config->pdm_in = FIELD_GET(SDW_SHIM_PDMSCAP_ISS, pdm_cap); 656 config->pdm_out = FIELD_GET(SDW_SHIM_PDMSCAP_OSS, pdm_cap); 657 658 dev_dbg(sdw->cdns.dev, "PDM cap bd:%d in:%d out:%d\n", 659 config->pdm_bd, config->pdm_in, config->pdm_out); 660 } 661 662 static int 663 intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num, bool pcm) 664 { 665 void __iomem *shim = sdw->link_res->shim; 666 unsigned int link_id = sdw->instance; 667 int count; 668 669 if (pcm) { 670 count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num)); 671 672 /* 673 * WORKAROUND: on all existing Intel controllers, pdi 674 * number 2 reports channel count as 1 even though it 675 * supports 8 channels. Performing hardcoding for pdi 676 * number 2. 677 */ 678 if (pdi_num == 2) 679 count = 7; 680 681 } else { 682 count = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id)); 683 count = FIELD_GET(SDW_SHIM_PDMSCAP_CPSS, count); 684 } 685 686 /* zero based values for channel count in register */ 687 count++; 688 689 return count; 690 } 691 692 static int intel_pdi_get_ch_update(struct sdw_intel *sdw, 693 struct sdw_cdns_pdi *pdi, 694 unsigned int num_pdi, 695 unsigned int *num_ch, bool pcm) 696 { 697 int i, ch_count = 0; 698 699 for (i = 0; i < num_pdi; i++) { 700 pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num, pcm); 701 ch_count += pdi->ch_count; 702 pdi++; 703 } 704 705 *num_ch = ch_count; 706 return 0; 707 } 708 709 static int intel_pdi_stream_ch_update(struct sdw_intel *sdw, 710 struct sdw_cdns_streams *stream, bool pcm) 711 { 712 intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd, 713 &stream->num_ch_bd, pcm); 714 715 intel_pdi_get_ch_update(sdw, stream->in, stream->num_in, 716 &stream->num_ch_in, pcm); 717 718 intel_pdi_get_ch_update(sdw, stream->out, stream->num_out, 719 &stream->num_ch_out, pcm); 720 721 return 0; 722 } 723 724 static int intel_pdi_ch_update(struct sdw_intel *sdw) 725 { 726 /* First update PCM streams followed by PDM streams */ 727 intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm, true); 728 intel_pdi_stream_ch_update(sdw, &sdw->cdns.pdm, false); 729 730 return 0; 731 } 732 733 static void 734 intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi) 735 { 736 void __iomem *shim = sdw->link_res->shim; 737 unsigned int link_id = sdw->instance; 738 int pdi_conf = 0; 739 740 /* the Bulk and PCM streams are not contiguous */ 741 pdi->intel_alh_id = (link_id * 16) + pdi->num + 3; 742 if (pdi->num >= 2) 743 pdi->intel_alh_id += 2; 744 745 /* 746 * Program stream parameters to stream SHIM register 747 * This is applicable for PCM stream only. 748 */ 749 if (pdi->type != SDW_STREAM_PCM) 750 return; 751 752 if (pdi->dir == SDW_DATA_DIR_RX) 753 pdi_conf |= SDW_SHIM_PCMSYCM_DIR; 754 else 755 pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR); 756 757 u32p_replace_bits(&pdi_conf, pdi->intel_alh_id, SDW_SHIM_PCMSYCM_STREAM); 758 u32p_replace_bits(&pdi_conf, pdi->l_ch_num, SDW_SHIM_PCMSYCM_LCHN); 759 u32p_replace_bits(&pdi_conf, pdi->h_ch_num, SDW_SHIM_PCMSYCM_HCHN); 760 761 intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf); 762 } 763 764 static void 765 intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi) 766 { 767 void __iomem *alh = sdw->link_res->alh; 768 unsigned int link_id = sdw->instance; 769 unsigned int conf; 770 771 /* the Bulk and PCM streams are not contiguous */ 772 pdi->intel_alh_id = (link_id * 16) + pdi->num + 3; 773 if (pdi->num >= 2) 774 pdi->intel_alh_id += 2; 775 776 /* Program Stream config ALH register */ 777 conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id)); 778 779 u32p_replace_bits(&conf, SDW_ALH_STRMZCFG_DMAT_VAL, SDW_ALH_STRMZCFG_DMAT); 780 u32p_replace_bits(&conf, pdi->ch_count - 1, SDW_ALH_STRMZCFG_CHN); 781 782 intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf); 783 } 784 785 static int intel_params_stream(struct sdw_intel *sdw, 786 struct snd_pcm_substream *substream, 787 struct snd_soc_dai *dai, 788 struct snd_pcm_hw_params *hw_params, 789 int link_id, int alh_stream_id) 790 { 791 struct sdw_intel_link_res *res = sdw->link_res; 792 struct sdw_intel_stream_params_data params_data; 793 794 params_data.substream = substream; 795 params_data.dai = dai; 796 params_data.hw_params = hw_params; 797 params_data.link_id = link_id; 798 params_data.alh_stream_id = alh_stream_id; 799 800 if (res->ops && res->ops->params_stream && res->dev) 801 return res->ops->params_stream(res->dev, 802 ¶ms_data); 803 return -EIO; 804 } 805 806 static int intel_free_stream(struct sdw_intel *sdw, 807 struct snd_pcm_substream *substream, 808 struct snd_soc_dai *dai, 809 int link_id) 810 { 811 struct sdw_intel_link_res *res = sdw->link_res; 812 struct sdw_intel_stream_free_data free_data; 813 814 free_data.substream = substream; 815 free_data.dai = dai; 816 free_data.link_id = link_id; 817 818 if (res->ops && res->ops->free_stream && res->dev) 819 return res->ops->free_stream(res->dev, 820 &free_data); 821 822 return 0; 823 } 824 825 /* 826 * bank switch routines 827 */ 828 829 static int intel_pre_bank_switch(struct sdw_bus *bus) 830 { 831 struct sdw_cdns *cdns = bus_to_cdns(bus); 832 struct sdw_intel *sdw = cdns_to_intel(cdns); 833 834 /* Write to register only for multi-link */ 835 if (!bus->multi_link) 836 return 0; 837 838 intel_shim_sync_arm(sdw); 839 840 return 0; 841 } 842 843 static int intel_post_bank_switch(struct sdw_bus *bus) 844 { 845 struct sdw_cdns *cdns = bus_to_cdns(bus); 846 struct sdw_intel *sdw = cdns_to_intel(cdns); 847 void __iomem *shim = sdw->link_res->shim; 848 int sync_reg, ret; 849 850 /* Write to register only for multi-link */ 851 if (!bus->multi_link) 852 return 0; 853 854 mutex_lock(sdw->link_res->shim_lock); 855 856 /* Read SYNC register */ 857 sync_reg = intel_readl(shim, SDW_SHIM_SYNC); 858 859 /* 860 * post_bank_switch() ops is called from the bus in loop for 861 * all the Masters in the steam with the expectation that 862 * we trigger the bankswitch for the only first Master in the list 863 * and do nothing for the other Masters 864 * 865 * So, set the SYNCGO bit only if CMDSYNC bit is set for any Master. 866 */ 867 if (!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK)) { 868 ret = 0; 869 goto unlock; 870 } 871 872 ret = intel_shim_sync_go_unlocked(sdw); 873 unlock: 874 mutex_unlock(sdw->link_res->shim_lock); 875 876 if (ret < 0) 877 dev_err(sdw->cdns.dev, "Post bank switch failed: %d\n", ret); 878 879 return ret; 880 } 881 882 /* 883 * DAI routines 884 */ 885 886 static int intel_startup(struct snd_pcm_substream *substream, 887 struct snd_soc_dai *dai) 888 { 889 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); 890 int ret; 891 892 ret = pm_runtime_get_sync(cdns->dev); 893 if (ret < 0 && ret != -EACCES) { 894 dev_err_ratelimited(cdns->dev, 895 "pm_runtime_get_sync failed in %s, ret %d\n", 896 __func__, ret); 897 pm_runtime_put_noidle(cdns->dev); 898 return ret; 899 } 900 return 0; 901 } 902 903 static int intel_hw_params(struct snd_pcm_substream *substream, 904 struct snd_pcm_hw_params *params, 905 struct snd_soc_dai *dai) 906 { 907 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); 908 struct sdw_intel *sdw = cdns_to_intel(cdns); 909 struct sdw_cdns_dma_data *dma; 910 struct sdw_cdns_pdi *pdi; 911 struct sdw_stream_config sconfig; 912 struct sdw_port_config *pconfig; 913 int ch, dir; 914 int ret; 915 bool pcm = true; 916 917 dma = snd_soc_dai_get_dma_data(dai, substream); 918 if (!dma) 919 return -EIO; 920 921 ch = params_channels(params); 922 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 923 dir = SDW_DATA_DIR_RX; 924 else 925 dir = SDW_DATA_DIR_TX; 926 927 if (dma->stream_type == SDW_STREAM_PDM) 928 pcm = false; 929 930 if (pcm) 931 pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir, dai->id); 932 else 933 pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pdm, ch, dir, dai->id); 934 935 if (!pdi) { 936 ret = -EINVAL; 937 goto error; 938 } 939 940 /* do run-time configurations for SHIM, ALH and PDI/PORT */ 941 intel_pdi_shim_configure(sdw, pdi); 942 intel_pdi_alh_configure(sdw, pdi); 943 sdw_cdns_config_stream(cdns, ch, dir, pdi); 944 945 /* store pdi and hw_params, may be needed in prepare step */ 946 dma->suspended = false; 947 dma->pdi = pdi; 948 dma->hw_params = params; 949 950 /* Inform DSP about PDI stream number */ 951 ret = intel_params_stream(sdw, substream, dai, params, 952 sdw->instance, 953 pdi->intel_alh_id); 954 if (ret) 955 goto error; 956 957 sconfig.direction = dir; 958 sconfig.ch_count = ch; 959 sconfig.frame_rate = params_rate(params); 960 sconfig.type = dma->stream_type; 961 962 if (dma->stream_type == SDW_STREAM_PDM) { 963 sconfig.frame_rate *= 50; 964 sconfig.bps = 1; 965 } else { 966 sconfig.bps = snd_pcm_format_width(params_format(params)); 967 } 968 969 /* Port configuration */ 970 pconfig = kcalloc(1, sizeof(*pconfig), GFP_KERNEL); 971 if (!pconfig) { 972 ret = -ENOMEM; 973 goto error; 974 } 975 976 pconfig->num = pdi->num; 977 pconfig->ch_mask = (1 << ch) - 1; 978 979 ret = sdw_stream_add_master(&cdns->bus, &sconfig, 980 pconfig, 1, dma->stream); 981 if (ret) 982 dev_err(cdns->dev, "add master to stream failed:%d\n", ret); 983 984 kfree(pconfig); 985 error: 986 return ret; 987 } 988 989 static int intel_prepare(struct snd_pcm_substream *substream, 990 struct snd_soc_dai *dai) 991 { 992 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); 993 struct sdw_intel *sdw = cdns_to_intel(cdns); 994 struct sdw_cdns_dma_data *dma; 995 int ch, dir; 996 int ret = 0; 997 998 dma = snd_soc_dai_get_dma_data(dai, substream); 999 if (!dma) { 1000 dev_err(dai->dev, "failed to get dma data in %s", 1001 __func__); 1002 return -EIO; 1003 } 1004 1005 if (dma->suspended) { 1006 dma->suspended = false; 1007 1008 /* 1009 * .prepare() is called after system resume, where we 1010 * need to reinitialize the SHIM/ALH/Cadence IP. 1011 * .prepare() is also called to deal with underflows, 1012 * but in those cases we cannot touch ALH/SHIM 1013 * registers 1014 */ 1015 1016 /* configure stream */ 1017 ch = params_channels(dma->hw_params); 1018 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1019 dir = SDW_DATA_DIR_RX; 1020 else 1021 dir = SDW_DATA_DIR_TX; 1022 1023 intel_pdi_shim_configure(sdw, dma->pdi); 1024 intel_pdi_alh_configure(sdw, dma->pdi); 1025 sdw_cdns_config_stream(cdns, ch, dir, dma->pdi); 1026 1027 /* Inform DSP about PDI stream number */ 1028 ret = intel_params_stream(sdw, substream, dai, 1029 dma->hw_params, 1030 sdw->instance, 1031 dma->pdi->intel_alh_id); 1032 } 1033 1034 return ret; 1035 } 1036 1037 static int 1038 intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) 1039 { 1040 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); 1041 struct sdw_intel *sdw = cdns_to_intel(cdns); 1042 struct sdw_cdns_dma_data *dma; 1043 int ret; 1044 1045 dma = snd_soc_dai_get_dma_data(dai, substream); 1046 if (!dma) 1047 return -EIO; 1048 1049 /* 1050 * The sdw stream state will transition to RELEASED when stream-> 1051 * master_list is empty. So the stream state will transition to 1052 * DEPREPARED for the first cpu-dai and to RELEASED for the last 1053 * cpu-dai. 1054 */ 1055 ret = sdw_stream_remove_master(&cdns->bus, dma->stream); 1056 if (ret < 0) { 1057 dev_err(dai->dev, "remove master from stream %s failed: %d\n", 1058 dma->stream->name, ret); 1059 return ret; 1060 } 1061 1062 ret = intel_free_stream(sdw, substream, dai, sdw->instance); 1063 if (ret < 0) { 1064 dev_err(dai->dev, "intel_free_stream: failed %d", ret); 1065 return ret; 1066 } 1067 1068 dma->hw_params = NULL; 1069 dma->pdi = NULL; 1070 1071 return 0; 1072 } 1073 1074 static void intel_shutdown(struct snd_pcm_substream *substream, 1075 struct snd_soc_dai *dai) 1076 { 1077 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai); 1078 1079 pm_runtime_mark_last_busy(cdns->dev); 1080 pm_runtime_put_autosuspend(cdns->dev); 1081 } 1082 1083 static int intel_component_dais_suspend(struct snd_soc_component *component) 1084 { 1085 struct sdw_cdns_dma_data *dma; 1086 struct snd_soc_dai *dai; 1087 1088 for_each_component_dais(component, dai) { 1089 /* 1090 * we don't have a .suspend dai_ops, and we don't have access 1091 * to the substream, so let's mark both capture and playback 1092 * DMA contexts as suspended 1093 */ 1094 dma = dai->playback_dma_data; 1095 if (dma) 1096 dma->suspended = true; 1097 1098 dma = dai->capture_dma_data; 1099 if (dma) 1100 dma->suspended = true; 1101 } 1102 1103 return 0; 1104 } 1105 1106 static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai, 1107 void *stream, int direction) 1108 { 1109 return cdns_set_sdw_stream(dai, stream, true, direction); 1110 } 1111 1112 static int intel_pdm_set_sdw_stream(struct snd_soc_dai *dai, 1113 void *stream, int direction) 1114 { 1115 return cdns_set_sdw_stream(dai, stream, false, direction); 1116 } 1117 1118 static void *intel_get_sdw_stream(struct snd_soc_dai *dai, 1119 int direction) 1120 { 1121 struct sdw_cdns_dma_data *dma; 1122 1123 if (direction == SNDRV_PCM_STREAM_PLAYBACK) 1124 dma = dai->playback_dma_data; 1125 else 1126 dma = dai->capture_dma_data; 1127 1128 if (!dma) 1129 return ERR_PTR(-EINVAL); 1130 1131 return dma->stream; 1132 } 1133 1134 static const struct snd_soc_dai_ops intel_pcm_dai_ops = { 1135 .startup = intel_startup, 1136 .hw_params = intel_hw_params, 1137 .prepare = intel_prepare, 1138 .hw_free = intel_hw_free, 1139 .shutdown = intel_shutdown, 1140 .set_sdw_stream = intel_pcm_set_sdw_stream, 1141 .get_sdw_stream = intel_get_sdw_stream, 1142 }; 1143 1144 static const struct snd_soc_dai_ops intel_pdm_dai_ops = { 1145 .startup = intel_startup, 1146 .hw_params = intel_hw_params, 1147 .prepare = intel_prepare, 1148 .hw_free = intel_hw_free, 1149 .shutdown = intel_shutdown, 1150 .set_sdw_stream = intel_pdm_set_sdw_stream, 1151 .get_sdw_stream = intel_get_sdw_stream, 1152 }; 1153 1154 static const struct snd_soc_component_driver dai_component = { 1155 .name = "soundwire", 1156 .suspend = intel_component_dais_suspend 1157 }; 1158 1159 static int intel_create_dai(struct sdw_cdns *cdns, 1160 struct snd_soc_dai_driver *dais, 1161 enum intel_pdi_type type, 1162 u32 num, u32 off, u32 max_ch, bool pcm) 1163 { 1164 int i; 1165 1166 if (num == 0) 1167 return 0; 1168 1169 /* TODO: Read supported rates/formats from hardware */ 1170 for (i = off; i < (off + num); i++) { 1171 dais[i].name = devm_kasprintf(cdns->dev, GFP_KERNEL, 1172 "SDW%d Pin%d", 1173 cdns->instance, i); 1174 if (!dais[i].name) 1175 return -ENOMEM; 1176 1177 if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) { 1178 dais[i].playback.channels_min = 1; 1179 dais[i].playback.channels_max = max_ch; 1180 dais[i].playback.rates = SNDRV_PCM_RATE_48000; 1181 dais[i].playback.formats = SNDRV_PCM_FMTBIT_S16_LE; 1182 } 1183 1184 if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) { 1185 dais[i].capture.channels_min = 1; 1186 dais[i].capture.channels_max = max_ch; 1187 dais[i].capture.rates = SNDRV_PCM_RATE_48000; 1188 dais[i].capture.formats = SNDRV_PCM_FMTBIT_S16_LE; 1189 } 1190 1191 if (pcm) 1192 dais[i].ops = &intel_pcm_dai_ops; 1193 else 1194 dais[i].ops = &intel_pdm_dai_ops; 1195 } 1196 1197 return 0; 1198 } 1199 1200 static int intel_register_dai(struct sdw_intel *sdw) 1201 { 1202 struct sdw_cdns *cdns = &sdw->cdns; 1203 struct sdw_cdns_streams *stream; 1204 struct snd_soc_dai_driver *dais; 1205 int num_dai, ret, off = 0; 1206 1207 /* DAIs are created based on total number of PDIs supported */ 1208 num_dai = cdns->pcm.num_pdi + cdns->pdm.num_pdi; 1209 1210 dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL); 1211 if (!dais) 1212 return -ENOMEM; 1213 1214 /* Create PCM DAIs */ 1215 stream = &cdns->pcm; 1216 1217 ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, cdns->pcm.num_in, 1218 off, stream->num_ch_in, true); 1219 if (ret) 1220 return ret; 1221 1222 off += cdns->pcm.num_in; 1223 ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pcm.num_out, 1224 off, stream->num_ch_out, true); 1225 if (ret) 1226 return ret; 1227 1228 off += cdns->pcm.num_out; 1229 ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pcm.num_bd, 1230 off, stream->num_ch_bd, true); 1231 if (ret) 1232 return ret; 1233 1234 /* Create PDM DAIs */ 1235 stream = &cdns->pdm; 1236 off += cdns->pcm.num_bd; 1237 ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, cdns->pdm.num_in, 1238 off, stream->num_ch_in, false); 1239 if (ret) 1240 return ret; 1241 1242 off += cdns->pdm.num_in; 1243 ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pdm.num_out, 1244 off, stream->num_ch_out, false); 1245 if (ret) 1246 return ret; 1247 1248 off += cdns->pdm.num_out; 1249 ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pdm.num_bd, 1250 off, stream->num_ch_bd, false); 1251 if (ret) 1252 return ret; 1253 1254 return snd_soc_register_component(cdns->dev, &dai_component, 1255 dais, num_dai); 1256 } 1257 1258 static int sdw_master_read_intel_prop(struct sdw_bus *bus) 1259 { 1260 struct sdw_master_prop *prop = &bus->prop; 1261 struct fwnode_handle *link; 1262 char name[32]; 1263 u32 quirk_mask; 1264 1265 /* Find master handle */ 1266 snprintf(name, sizeof(name), 1267 "mipi-sdw-link-%d-subproperties", bus->link_id); 1268 1269 link = device_get_named_child_node(bus->dev, name); 1270 if (!link) { 1271 dev_err(bus->dev, "Master node %s not found\n", name); 1272 return -EIO; 1273 } 1274 1275 fwnode_property_read_u32(link, 1276 "intel-sdw-ip-clock", 1277 &prop->mclk_freq); 1278 1279 /* the values reported by BIOS are the 2x clock, not the bus clock */ 1280 prop->mclk_freq /= 2; 1281 1282 fwnode_property_read_u32(link, 1283 "intel-quirk-mask", 1284 &quirk_mask); 1285 1286 if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE) 1287 prop->hw_disabled = true; 1288 1289 return 0; 1290 } 1291 1292 static int intel_prop_read(struct sdw_bus *bus) 1293 { 1294 /* Initialize with default handler to read all DisCo properties */ 1295 sdw_master_read_prop(bus); 1296 1297 /* read Intel-specific properties */ 1298 sdw_master_read_intel_prop(bus); 1299 1300 return 0; 1301 } 1302 1303 static struct sdw_master_ops sdw_intel_ops = { 1304 .read_prop = sdw_master_read_prop, 1305 .xfer_msg = cdns_xfer_msg, 1306 .xfer_msg_defer = cdns_xfer_msg_defer, 1307 .reset_page_addr = cdns_reset_page_addr, 1308 .set_bus_conf = cdns_bus_conf, 1309 .pre_bank_switch = intel_pre_bank_switch, 1310 .post_bank_switch = intel_post_bank_switch, 1311 }; 1312 1313 static int intel_init(struct sdw_intel *sdw) 1314 { 1315 bool clock_stop; 1316 1317 /* Initialize shim and controller */ 1318 intel_link_power_up(sdw); 1319 1320 clock_stop = sdw_cdns_is_clock_stop(&sdw->cdns); 1321 1322 intel_shim_init(sdw, clock_stop); 1323 1324 return 0; 1325 } 1326 1327 /* 1328 * probe and init 1329 */ 1330 static int intel_master_probe(struct platform_device *pdev) 1331 { 1332 struct device *dev = &pdev->dev; 1333 struct sdw_intel *sdw; 1334 struct sdw_cdns *cdns; 1335 struct sdw_bus *bus; 1336 int ret; 1337 1338 sdw = devm_kzalloc(dev, sizeof(*sdw), GFP_KERNEL); 1339 if (!sdw) 1340 return -ENOMEM; 1341 1342 cdns = &sdw->cdns; 1343 bus = &cdns->bus; 1344 1345 sdw->instance = pdev->id; 1346 sdw->link_res = dev_get_platdata(dev); 1347 cdns->dev = dev; 1348 cdns->registers = sdw->link_res->registers; 1349 cdns->instance = sdw->instance; 1350 cdns->msg_count = 0; 1351 1352 bus->link_id = pdev->id; 1353 1354 sdw_cdns_probe(cdns); 1355 1356 /* Set property read ops */ 1357 sdw_intel_ops.read_prop = intel_prop_read; 1358 bus->ops = &sdw_intel_ops; 1359 1360 /* set driver data, accessed by snd_soc_dai_get_drvdata() */ 1361 dev_set_drvdata(dev, cdns); 1362 1363 /* use generic bandwidth allocation algorithm */ 1364 sdw->cdns.bus.compute_params = sdw_compute_params; 1365 1366 ret = sdw_bus_master_add(bus, dev, dev->fwnode); 1367 if (ret) { 1368 dev_err(dev, "sdw_bus_master_add fail: %d\n", ret); 1369 return ret; 1370 } 1371 1372 if (bus->prop.hw_disabled) 1373 dev_info(dev, 1374 "SoundWire master %d is disabled, will be ignored\n", 1375 bus->link_id); 1376 /* 1377 * Ignore BIOS err_threshold, it's a really bad idea when dealing 1378 * with multiple hardware synchronized links 1379 */ 1380 bus->prop.err_threshold = 0; 1381 1382 return 0; 1383 } 1384 1385 int intel_master_startup(struct platform_device *pdev) 1386 { 1387 struct sdw_cdns_stream_config config; 1388 struct device *dev = &pdev->dev; 1389 struct sdw_cdns *cdns = dev_get_drvdata(dev); 1390 struct sdw_intel *sdw = cdns_to_intel(cdns); 1391 struct sdw_bus *bus = &cdns->bus; 1392 int link_flags; 1393 bool multi_link; 1394 u32 clock_stop_quirks; 1395 int ret; 1396 1397 if (bus->prop.hw_disabled) { 1398 dev_info(dev, 1399 "SoundWire master %d is disabled, ignoring\n", 1400 sdw->instance); 1401 return 0; 1402 } 1403 1404 link_flags = md_flags >> (bus->link_id * 8); 1405 multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK); 1406 if (!multi_link) { 1407 dev_dbg(dev, "Multi-link is disabled\n"); 1408 bus->multi_link = false; 1409 } else { 1410 /* 1411 * hardware-based synchronization is required regardless 1412 * of the number of segments used by a stream: SSP-based 1413 * synchronization is gated by gsync when the multi-master 1414 * mode is set. 1415 */ 1416 bus->multi_link = true; 1417 bus->hw_sync_min_links = 1; 1418 } 1419 1420 /* Initialize shim, controller */ 1421 ret = intel_init(sdw); 1422 if (ret) 1423 goto err_init; 1424 1425 /* Read the PDI config and initialize cadence PDI */ 1426 intel_pdi_init(sdw, &config); 1427 ret = sdw_cdns_pdi_init(cdns, config); 1428 if (ret) 1429 goto err_init; 1430 1431 intel_pdi_ch_update(sdw); 1432 1433 ret = sdw_cdns_enable_interrupt(cdns, true); 1434 if (ret < 0) { 1435 dev_err(dev, "cannot enable interrupts\n"); 1436 goto err_init; 1437 } 1438 1439 /* 1440 * follow recommended programming flows to avoid timeouts when 1441 * gsync is enabled 1442 */ 1443 if (multi_link) 1444 intel_shim_sync_arm(sdw); 1445 1446 ret = sdw_cdns_init(cdns); 1447 if (ret < 0) { 1448 dev_err(dev, "unable to initialize Cadence IP\n"); 1449 goto err_interrupt; 1450 } 1451 1452 ret = sdw_cdns_exit_reset(cdns); 1453 if (ret < 0) { 1454 dev_err(dev, "unable to exit bus reset sequence\n"); 1455 goto err_interrupt; 1456 } 1457 1458 if (multi_link) { 1459 ret = intel_shim_sync_go(sdw); 1460 if (ret < 0) { 1461 dev_err(dev, "sync go failed: %d\n", ret); 1462 goto err_interrupt; 1463 } 1464 } 1465 1466 /* Register DAIs */ 1467 ret = intel_register_dai(sdw); 1468 if (ret) { 1469 dev_err(dev, "DAI registration failed: %d\n", ret); 1470 snd_soc_unregister_component(dev); 1471 goto err_interrupt; 1472 } 1473 1474 intel_debugfs_init(sdw); 1475 1476 /* Enable runtime PM */ 1477 if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) { 1478 pm_runtime_set_autosuspend_delay(dev, 1479 INTEL_MASTER_SUSPEND_DELAY_MS); 1480 pm_runtime_use_autosuspend(dev); 1481 pm_runtime_mark_last_busy(dev); 1482 1483 pm_runtime_set_active(dev); 1484 pm_runtime_enable(dev); 1485 } 1486 1487 clock_stop_quirks = sdw->link_res->clock_stop_quirks; 1488 if (clock_stop_quirks & SDW_INTEL_CLK_STOP_NOT_ALLOWED) { 1489 /* 1490 * To keep the clock running we need to prevent 1491 * pm_runtime suspend from happening by increasing the 1492 * reference count. 1493 * This quirk is specified by the parent PCI device in 1494 * case of specific latency requirements. It will have 1495 * no effect if pm_runtime is disabled by the user via 1496 * a module parameter for testing purposes. 1497 */ 1498 pm_runtime_get_noresume(dev); 1499 } 1500 1501 /* 1502 * The runtime PM status of Slave devices is "Unsupported" 1503 * until they report as ATTACHED. If they don't, e.g. because 1504 * there are no Slave devices populated or if the power-on is 1505 * delayed or dependent on a power switch, the Master will 1506 * remain active and prevent its parent from suspending. 1507 * 1508 * Conditionally force the pm_runtime core to re-evaluate the 1509 * Master status in the absence of any Slave activity. A quirk 1510 * is provided to e.g. deal with Slaves that may be powered on 1511 * with a delay. A more complete solution would require the 1512 * definition of Master properties. 1513 */ 1514 if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE)) 1515 pm_runtime_idle(dev); 1516 1517 return 0; 1518 1519 err_interrupt: 1520 sdw_cdns_enable_interrupt(cdns, false); 1521 err_init: 1522 return ret; 1523 } 1524 1525 static int intel_master_remove(struct platform_device *pdev) 1526 { 1527 struct device *dev = &pdev->dev; 1528 struct sdw_cdns *cdns = dev_get_drvdata(dev); 1529 struct sdw_intel *sdw = cdns_to_intel(cdns); 1530 struct sdw_bus *bus = &cdns->bus; 1531 1532 /* 1533 * Since pm_runtime is already disabled, we don't decrease 1534 * the refcount when the clock_stop_quirk is 1535 * SDW_INTEL_CLK_STOP_NOT_ALLOWED 1536 */ 1537 if (!bus->prop.hw_disabled) { 1538 intel_debugfs_exit(sdw); 1539 sdw_cdns_enable_interrupt(cdns, false); 1540 snd_soc_unregister_component(dev); 1541 } 1542 sdw_bus_master_delete(bus); 1543 1544 return 0; 1545 } 1546 1547 int intel_master_process_wakeen_event(struct platform_device *pdev) 1548 { 1549 struct device *dev = &pdev->dev; 1550 struct sdw_intel *sdw; 1551 struct sdw_bus *bus; 1552 void __iomem *shim; 1553 u16 wake_sts; 1554 1555 sdw = platform_get_drvdata(pdev); 1556 bus = &sdw->cdns.bus; 1557 1558 if (bus->prop.hw_disabled) { 1559 dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", bus->link_id); 1560 return 0; 1561 } 1562 1563 shim = sdw->link_res->shim; 1564 wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS); 1565 1566 if (!(wake_sts & BIT(sdw->instance))) 1567 return 0; 1568 1569 /* disable WAKEEN interrupt ASAP to prevent interrupt flood */ 1570 intel_shim_wake(sdw, false); 1571 1572 /* 1573 * resume the Master, which will generate a bus reset and result in 1574 * Slaves re-attaching and be re-enumerated. The SoundWire physical 1575 * device which generated the wake will trigger an interrupt, which 1576 * will in turn cause the corresponding Linux Slave device to be 1577 * resumed and the Slave codec driver to check the status. 1578 */ 1579 pm_request_resume(dev); 1580 1581 return 0; 1582 } 1583 1584 /* 1585 * PM calls 1586 */ 1587 1588 #ifdef CONFIG_PM 1589 1590 static int __maybe_unused intel_suspend(struct device *dev) 1591 { 1592 struct sdw_cdns *cdns = dev_get_drvdata(dev); 1593 struct sdw_intel *sdw = cdns_to_intel(cdns); 1594 struct sdw_bus *bus = &cdns->bus; 1595 u32 clock_stop_quirks; 1596 int ret; 1597 1598 if (bus->prop.hw_disabled) { 1599 dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", 1600 bus->link_id); 1601 return 0; 1602 } 1603 1604 if (pm_runtime_suspended(dev)) { 1605 dev_dbg(dev, "%s: pm_runtime status: suspended\n", __func__); 1606 1607 clock_stop_quirks = sdw->link_res->clock_stop_quirks; 1608 1609 if ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || 1610 !clock_stop_quirks) && 1611 !pm_runtime_suspended(dev->parent)) { 1612 1613 /* 1614 * if we've enabled clock stop, and the parent 1615 * is still active, disable shim wake. The 1616 * SHIM registers are not accessible if the 1617 * parent is already pm_runtime suspended so 1618 * it's too late to change that configuration 1619 */ 1620 1621 intel_shim_wake(sdw, false); 1622 } 1623 1624 return 0; 1625 } 1626 1627 ret = sdw_cdns_enable_interrupt(cdns, false); 1628 if (ret < 0) { 1629 dev_err(dev, "cannot disable interrupts on suspend\n"); 1630 return ret; 1631 } 1632 1633 ret = intel_link_power_down(sdw); 1634 if (ret) { 1635 dev_err(dev, "Link power down failed: %d", ret); 1636 return ret; 1637 } 1638 1639 intel_shim_wake(sdw, false); 1640 1641 return 0; 1642 } 1643 1644 static int intel_suspend_runtime(struct device *dev) 1645 { 1646 struct sdw_cdns *cdns = dev_get_drvdata(dev); 1647 struct sdw_intel *sdw = cdns_to_intel(cdns); 1648 struct sdw_bus *bus = &cdns->bus; 1649 u32 clock_stop_quirks; 1650 int ret; 1651 1652 if (bus->prop.hw_disabled) { 1653 dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", 1654 bus->link_id); 1655 return 0; 1656 } 1657 1658 clock_stop_quirks = sdw->link_res->clock_stop_quirks; 1659 1660 if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) { 1661 1662 ret = sdw_cdns_enable_interrupt(cdns, false); 1663 if (ret < 0) { 1664 dev_err(dev, "cannot disable interrupts on suspend\n"); 1665 return ret; 1666 } 1667 1668 ret = intel_link_power_down(sdw); 1669 if (ret) { 1670 dev_err(dev, "Link power down failed: %d", ret); 1671 return ret; 1672 } 1673 1674 intel_shim_wake(sdw, false); 1675 1676 } else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || 1677 !clock_stop_quirks) { 1678 ret = sdw_cdns_clock_stop(cdns, true); 1679 if (ret < 0) { 1680 dev_err(dev, "cannot enable clock stop on suspend\n"); 1681 return ret; 1682 } 1683 1684 ret = sdw_cdns_enable_interrupt(cdns, false); 1685 if (ret < 0) { 1686 dev_err(dev, "cannot disable interrupts on suspend\n"); 1687 return ret; 1688 } 1689 1690 ret = intel_link_power_down(sdw); 1691 if (ret) { 1692 dev_err(dev, "Link power down failed: %d", ret); 1693 return ret; 1694 } 1695 1696 intel_shim_wake(sdw, true); 1697 } else { 1698 dev_err(dev, "%s clock_stop_quirks %x unsupported\n", 1699 __func__, clock_stop_quirks); 1700 ret = -EINVAL; 1701 } 1702 1703 return ret; 1704 } 1705 1706 static int __maybe_unused intel_resume(struct device *dev) 1707 { 1708 struct sdw_cdns *cdns = dev_get_drvdata(dev); 1709 struct sdw_intel *sdw = cdns_to_intel(cdns); 1710 struct sdw_bus *bus = &cdns->bus; 1711 int link_flags; 1712 bool multi_link; 1713 int ret; 1714 1715 if (bus->prop.hw_disabled) { 1716 dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", 1717 bus->link_id); 1718 return 0; 1719 } 1720 1721 link_flags = md_flags >> (bus->link_id * 8); 1722 multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK); 1723 1724 if (pm_runtime_suspended(dev)) { 1725 dev_dbg(dev, "%s: pm_runtime status was suspended, forcing active\n", __func__); 1726 1727 /* follow required sequence from runtime_pm.rst */ 1728 pm_runtime_disable(dev); 1729 pm_runtime_set_active(dev); 1730 pm_runtime_mark_last_busy(dev); 1731 pm_runtime_enable(dev); 1732 1733 link_flags = md_flags >> (bus->link_id * 8); 1734 1735 if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE)) 1736 pm_runtime_idle(dev); 1737 } 1738 1739 ret = intel_init(sdw); 1740 if (ret) { 1741 dev_err(dev, "%s failed: %d", __func__, ret); 1742 return ret; 1743 } 1744 1745 /* 1746 * make sure all Slaves are tagged as UNATTACHED and provide 1747 * reason for reinitialization 1748 */ 1749 sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET); 1750 1751 ret = sdw_cdns_enable_interrupt(cdns, true); 1752 if (ret < 0) { 1753 dev_err(dev, "cannot enable interrupts during resume\n"); 1754 return ret; 1755 } 1756 1757 /* 1758 * follow recommended programming flows to avoid timeouts when 1759 * gsync is enabled 1760 */ 1761 if (multi_link) 1762 intel_shim_sync_arm(sdw); 1763 1764 ret = sdw_cdns_init(&sdw->cdns); 1765 if (ret < 0) { 1766 dev_err(dev, "unable to initialize Cadence IP during resume\n"); 1767 return ret; 1768 } 1769 1770 ret = sdw_cdns_exit_reset(cdns); 1771 if (ret < 0) { 1772 dev_err(dev, "unable to exit bus reset sequence during resume\n"); 1773 return ret; 1774 } 1775 1776 if (multi_link) { 1777 ret = intel_shim_sync_go(sdw); 1778 if (ret < 0) { 1779 dev_err(dev, "sync go failed during resume\n"); 1780 return ret; 1781 } 1782 } 1783 1784 /* 1785 * after system resume, the pm_runtime suspend() may kick in 1786 * during the enumeration, before any children device force the 1787 * master device to remain active. Using pm_runtime_get() 1788 * routines is not really possible, since it'd prevent the 1789 * master from suspending. 1790 * A reasonable compromise is to update the pm_runtime 1791 * counters and delay the pm_runtime suspend by several 1792 * seconds, by when all enumeration should be complete. 1793 */ 1794 pm_runtime_mark_last_busy(dev); 1795 1796 return ret; 1797 } 1798 1799 static int intel_resume_runtime(struct device *dev) 1800 { 1801 struct sdw_cdns *cdns = dev_get_drvdata(dev); 1802 struct sdw_intel *sdw = cdns_to_intel(cdns); 1803 struct sdw_bus *bus = &cdns->bus; 1804 u32 clock_stop_quirks; 1805 bool clock_stop0; 1806 int link_flags; 1807 bool multi_link; 1808 int status; 1809 int ret; 1810 1811 if (bus->prop.hw_disabled) { 1812 dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", 1813 bus->link_id); 1814 return 0; 1815 } 1816 1817 link_flags = md_flags >> (bus->link_id * 8); 1818 multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK); 1819 1820 clock_stop_quirks = sdw->link_res->clock_stop_quirks; 1821 1822 if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) { 1823 ret = intel_init(sdw); 1824 if (ret) { 1825 dev_err(dev, "%s failed: %d", __func__, ret); 1826 return ret; 1827 } 1828 1829 /* 1830 * make sure all Slaves are tagged as UNATTACHED and provide 1831 * reason for reinitialization 1832 */ 1833 sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET); 1834 1835 ret = sdw_cdns_enable_interrupt(cdns, true); 1836 if (ret < 0) { 1837 dev_err(dev, "cannot enable interrupts during resume\n"); 1838 return ret; 1839 } 1840 1841 /* 1842 * follow recommended programming flows to avoid 1843 * timeouts when gsync is enabled 1844 */ 1845 if (multi_link) 1846 intel_shim_sync_arm(sdw); 1847 1848 ret = sdw_cdns_init(&sdw->cdns); 1849 if (ret < 0) { 1850 dev_err(dev, "unable to initialize Cadence IP during resume\n"); 1851 return ret; 1852 } 1853 1854 ret = sdw_cdns_exit_reset(cdns); 1855 if (ret < 0) { 1856 dev_err(dev, "unable to exit bus reset sequence during resume\n"); 1857 return ret; 1858 } 1859 1860 if (multi_link) { 1861 ret = intel_shim_sync_go(sdw); 1862 if (ret < 0) { 1863 dev_err(dev, "sync go failed during resume\n"); 1864 return ret; 1865 } 1866 } 1867 } else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) { 1868 ret = intel_init(sdw); 1869 if (ret) { 1870 dev_err(dev, "%s failed: %d", __func__, ret); 1871 return ret; 1872 } 1873 1874 /* 1875 * An exception condition occurs for the CLK_STOP_BUS_RESET 1876 * case if one or more masters remain active. In this condition, 1877 * all the masters are powered on for they are in the same power 1878 * domain. Master can preserve its context for clock stop0, so 1879 * there is no need to clear slave status and reset bus. 1880 */ 1881 clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns); 1882 1883 if (!clock_stop0) { 1884 1885 /* 1886 * make sure all Slaves are tagged as UNATTACHED and 1887 * provide reason for reinitialization 1888 */ 1889 1890 status = SDW_UNATTACH_REQUEST_MASTER_RESET; 1891 sdw_clear_slave_status(bus, status); 1892 1893 ret = sdw_cdns_enable_interrupt(cdns, true); 1894 if (ret < 0) { 1895 dev_err(dev, "cannot enable interrupts during resume\n"); 1896 return ret; 1897 } 1898 1899 /* 1900 * follow recommended programming flows to avoid 1901 * timeouts when gsync is enabled 1902 */ 1903 if (multi_link) 1904 intel_shim_sync_arm(sdw); 1905 1906 /* 1907 * Re-initialize the IP since it was powered-off 1908 */ 1909 sdw_cdns_init(&sdw->cdns); 1910 1911 } else { 1912 ret = sdw_cdns_enable_interrupt(cdns, true); 1913 if (ret < 0) { 1914 dev_err(dev, "cannot enable interrupts during resume\n"); 1915 return ret; 1916 } 1917 } 1918 1919 ret = sdw_cdns_clock_restart(cdns, !clock_stop0); 1920 if (ret < 0) { 1921 dev_err(dev, "unable to restart clock during resume\n"); 1922 return ret; 1923 } 1924 1925 if (!clock_stop0) { 1926 ret = sdw_cdns_exit_reset(cdns); 1927 if (ret < 0) { 1928 dev_err(dev, "unable to exit bus reset sequence during resume\n"); 1929 return ret; 1930 } 1931 1932 if (multi_link) { 1933 ret = intel_shim_sync_go(sdw); 1934 if (ret < 0) { 1935 dev_err(sdw->cdns.dev, "sync go failed during resume\n"); 1936 return ret; 1937 } 1938 } 1939 } 1940 } else if (!clock_stop_quirks) { 1941 1942 clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns); 1943 if (!clock_stop0) 1944 dev_err(dev, "%s invalid configuration, clock was not stopped", __func__); 1945 1946 ret = intel_init(sdw); 1947 if (ret) { 1948 dev_err(dev, "%s failed: %d", __func__, ret); 1949 return ret; 1950 } 1951 1952 ret = sdw_cdns_enable_interrupt(cdns, true); 1953 if (ret < 0) { 1954 dev_err(dev, "cannot enable interrupts during resume\n"); 1955 return ret; 1956 } 1957 1958 ret = sdw_cdns_clock_restart(cdns, false); 1959 if (ret < 0) { 1960 dev_err(dev, "unable to resume master during resume\n"); 1961 return ret; 1962 } 1963 } else { 1964 dev_err(dev, "%s clock_stop_quirks %x unsupported\n", 1965 __func__, clock_stop_quirks); 1966 ret = -EINVAL; 1967 } 1968 1969 return ret; 1970 } 1971 1972 #endif 1973 1974 static const struct dev_pm_ops intel_pm = { 1975 SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume) 1976 SET_RUNTIME_PM_OPS(intel_suspend_runtime, intel_resume_runtime, NULL) 1977 }; 1978 1979 static struct platform_driver sdw_intel_drv = { 1980 .probe = intel_master_probe, 1981 .remove = intel_master_remove, 1982 .driver = { 1983 .name = "intel-sdw", 1984 .pm = &intel_pm, 1985 } 1986 }; 1987 1988 module_platform_driver(sdw_intel_drv); 1989 1990 MODULE_LICENSE("Dual BSD/GPL"); 1991 MODULE_ALIAS("platform:intel-sdw"); 1992 MODULE_DESCRIPTION("Intel Soundwire Master Driver"); 1993