1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * core.c - DesignWare USB3 DRD Controller Core file 4 * 5 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com 6 * 7 * Authors: Felipe Balbi <balbi@ti.com>, 8 * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/version.h> 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/slab.h> 16 #include <linux/spinlock.h> 17 #include <linux/platform_device.h> 18 #include <linux/pm_runtime.h> 19 #include <linux/interrupt.h> 20 #include <linux/ioport.h> 21 #include <linux/io.h> 22 #include <linux/list.h> 23 #include <linux/delay.h> 24 #include <linux/dma-mapping.h> 25 #include <linux/of.h> 26 #include <linux/of_graph.h> 27 #include <linux/acpi.h> 28 #include <linux/pinctrl/consumer.h> 29 #include <linux/reset.h> 30 #include <linux/bitfield.h> 31 32 #include <linux/usb/ch9.h> 33 #include <linux/usb/gadget.h> 34 #include <linux/usb/of.h> 35 #include <linux/usb/otg.h> 36 37 #include "core.h" 38 #include "gadget.h" 39 #include "io.h" 40 41 #include "debug.h" 42 43 #define DWC3_DEFAULT_AUTOSUSPEND_DELAY 5000 /* ms */ 44 45 /** 46 * dwc3_get_dr_mode - Validates and sets dr_mode 47 * @dwc: pointer to our context structure 48 */ 49 static int dwc3_get_dr_mode(struct dwc3 *dwc) 50 { 51 enum usb_dr_mode mode; 52 struct device *dev = dwc->dev; 53 unsigned int hw_mode; 54 55 if (dwc->dr_mode == USB_DR_MODE_UNKNOWN) 56 dwc->dr_mode = USB_DR_MODE_OTG; 57 58 mode = dwc->dr_mode; 59 hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); 60 61 switch (hw_mode) { 62 case DWC3_GHWPARAMS0_MODE_GADGET: 63 if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) { 64 dev_err(dev, 65 "Controller does not support host mode.\n"); 66 return -EINVAL; 67 } 68 mode = USB_DR_MODE_PERIPHERAL; 69 break; 70 case DWC3_GHWPARAMS0_MODE_HOST: 71 if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) { 72 dev_err(dev, 73 "Controller does not support device mode.\n"); 74 return -EINVAL; 75 } 76 mode = USB_DR_MODE_HOST; 77 break; 78 default: 79 if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) 80 mode = USB_DR_MODE_HOST; 81 else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) 82 mode = USB_DR_MODE_PERIPHERAL; 83 84 /* 85 * DWC_usb31 and DWC_usb3 v3.30a and higher do not support OTG 86 * mode. If the controller supports DRD but the dr_mode is not 87 * specified or set to OTG, then set the mode to peripheral. 88 */ 89 if (mode == USB_DR_MODE_OTG && !dwc->edev && 90 (!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) || 91 !device_property_read_bool(dwc->dev, "usb-role-switch")) && 92 !DWC3_VER_IS_PRIOR(DWC3, 330A)) 93 mode = USB_DR_MODE_PERIPHERAL; 94 } 95 96 if (mode != dwc->dr_mode) { 97 dev_warn(dev, 98 "Configuration mismatch. dr_mode forced to %s\n", 99 mode == USB_DR_MODE_HOST ? "host" : "gadget"); 100 101 dwc->dr_mode = mode; 102 } 103 104 return 0; 105 } 106 107 void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode) 108 { 109 u32 reg; 110 111 reg = dwc3_readl(dwc->regs, DWC3_GCTL); 112 reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); 113 reg |= DWC3_GCTL_PRTCAPDIR(mode); 114 dwc3_writel(dwc->regs, DWC3_GCTL, reg); 115 116 dwc->current_dr_role = mode; 117 } 118 119 static void __dwc3_set_mode(struct work_struct *work) 120 { 121 struct dwc3 *dwc = work_to_dwc(work); 122 unsigned long flags; 123 int ret; 124 u32 reg; 125 u32 desired_dr_role; 126 127 mutex_lock(&dwc->mutex); 128 spin_lock_irqsave(&dwc->lock, flags); 129 desired_dr_role = dwc->desired_dr_role; 130 spin_unlock_irqrestore(&dwc->lock, flags); 131 132 pm_runtime_get_sync(dwc->dev); 133 134 if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG) 135 dwc3_otg_update(dwc, 0); 136 137 if (!desired_dr_role) 138 goto out; 139 140 if (desired_dr_role == dwc->current_dr_role) 141 goto out; 142 143 if (desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev) 144 goto out; 145 146 switch (dwc->current_dr_role) { 147 case DWC3_GCTL_PRTCAP_HOST: 148 dwc3_host_exit(dwc); 149 break; 150 case DWC3_GCTL_PRTCAP_DEVICE: 151 dwc3_gadget_exit(dwc); 152 dwc3_event_buffers_cleanup(dwc); 153 break; 154 case DWC3_GCTL_PRTCAP_OTG: 155 dwc3_otg_exit(dwc); 156 spin_lock_irqsave(&dwc->lock, flags); 157 dwc->desired_otg_role = DWC3_OTG_ROLE_IDLE; 158 spin_unlock_irqrestore(&dwc->lock, flags); 159 dwc3_otg_update(dwc, 1); 160 break; 161 default: 162 break; 163 } 164 165 /* 166 * When current_dr_role is not set, there's no role switching. 167 * Only perform GCTL.CoreSoftReset when there's DRD role switching. 168 */ 169 if (dwc->current_dr_role && ((DWC3_IP_IS(DWC3) || 170 DWC3_VER_IS_PRIOR(DWC31, 190A)) && 171 desired_dr_role != DWC3_GCTL_PRTCAP_OTG)) { 172 reg = dwc3_readl(dwc->regs, DWC3_GCTL); 173 reg |= DWC3_GCTL_CORESOFTRESET; 174 dwc3_writel(dwc->regs, DWC3_GCTL, reg); 175 176 /* 177 * Wait for internal clocks to synchronized. DWC_usb31 and 178 * DWC_usb32 may need at least 50ms (less for DWC_usb3). To 179 * keep it consistent across different IPs, let's wait up to 180 * 100ms before clearing GCTL.CORESOFTRESET. 181 */ 182 msleep(100); 183 184 reg = dwc3_readl(dwc->regs, DWC3_GCTL); 185 reg &= ~DWC3_GCTL_CORESOFTRESET; 186 dwc3_writel(dwc->regs, DWC3_GCTL, reg); 187 } 188 189 spin_lock_irqsave(&dwc->lock, flags); 190 191 dwc3_set_prtcap(dwc, desired_dr_role); 192 193 spin_unlock_irqrestore(&dwc->lock, flags); 194 195 switch (desired_dr_role) { 196 case DWC3_GCTL_PRTCAP_HOST: 197 ret = dwc3_host_init(dwc); 198 if (ret) { 199 dev_err(dwc->dev, "failed to initialize host\n"); 200 } else { 201 if (dwc->usb2_phy) 202 otg_set_vbus(dwc->usb2_phy->otg, true); 203 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); 204 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); 205 if (dwc->dis_split_quirk) { 206 reg = dwc3_readl(dwc->regs, DWC3_GUCTL3); 207 reg |= DWC3_GUCTL3_SPLITDISABLE; 208 dwc3_writel(dwc->regs, DWC3_GUCTL3, reg); 209 } 210 } 211 break; 212 case DWC3_GCTL_PRTCAP_DEVICE: 213 dwc3_core_soft_reset(dwc); 214 215 dwc3_event_buffers_setup(dwc); 216 217 if (dwc->usb2_phy) 218 otg_set_vbus(dwc->usb2_phy->otg, false); 219 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE); 220 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE); 221 222 ret = dwc3_gadget_init(dwc); 223 if (ret) 224 dev_err(dwc->dev, "failed to initialize peripheral\n"); 225 break; 226 case DWC3_GCTL_PRTCAP_OTG: 227 dwc3_otg_init(dwc); 228 dwc3_otg_update(dwc, 0); 229 break; 230 default: 231 break; 232 } 233 234 out: 235 pm_runtime_mark_last_busy(dwc->dev); 236 pm_runtime_put_autosuspend(dwc->dev); 237 mutex_unlock(&dwc->mutex); 238 } 239 240 void dwc3_set_mode(struct dwc3 *dwc, u32 mode) 241 { 242 unsigned long flags; 243 244 if (dwc->dr_mode != USB_DR_MODE_OTG) 245 return; 246 247 spin_lock_irqsave(&dwc->lock, flags); 248 dwc->desired_dr_role = mode; 249 spin_unlock_irqrestore(&dwc->lock, flags); 250 251 queue_work(system_freezable_wq, &dwc->drd_work); 252 } 253 254 u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type) 255 { 256 struct dwc3 *dwc = dep->dwc; 257 u32 reg; 258 259 dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE, 260 DWC3_GDBGFIFOSPACE_NUM(dep->number) | 261 DWC3_GDBGFIFOSPACE_TYPE(type)); 262 263 reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE); 264 265 return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg); 266 } 267 268 /** 269 * dwc3_core_soft_reset - Issues core soft reset and PHY reset 270 * @dwc: pointer to our context structure 271 */ 272 int dwc3_core_soft_reset(struct dwc3 *dwc) 273 { 274 u32 reg; 275 int retries = 1000; 276 277 /* 278 * We're resetting only the device side because, if we're in host mode, 279 * XHCI driver will reset the host block. If dwc3 was configured for 280 * host-only mode or current role is host, then we can return early. 281 */ 282 if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) 283 return 0; 284 285 /* 286 * If the dr_mode is host and the dwc->current_dr_role is not the 287 * corresponding DWC3_GCTL_PRTCAP_HOST, then the dwc3_core_init_mode 288 * isn't executed yet. Ensure the phy is ready before the controller 289 * updates the GCTL.PRTCAPDIR or other settings by soft-resetting 290 * the phy. 291 * 292 * Note: GUSB3PIPECTL[n] and GUSB2PHYCFG[n] are port settings where n 293 * is port index. If this is a multiport host, then we need to reset 294 * all active ports. 295 */ 296 if (dwc->dr_mode == USB_DR_MODE_HOST) { 297 u32 usb3_port; 298 u32 usb2_port; 299 300 usb3_port = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 301 usb3_port |= DWC3_GUSB3PIPECTL_PHYSOFTRST; 302 dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), usb3_port); 303 304 usb2_port = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 305 usb2_port |= DWC3_GUSB2PHYCFG_PHYSOFTRST; 306 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), usb2_port); 307 308 /* Small delay for phy reset assertion */ 309 usleep_range(1000, 2000); 310 311 usb3_port &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; 312 dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), usb3_port); 313 314 usb2_port &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; 315 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), usb2_port); 316 317 /* Wait for clock synchronization */ 318 msleep(50); 319 return 0; 320 } 321 322 reg = dwc3_readl(dwc->regs, DWC3_DCTL); 323 reg |= DWC3_DCTL_CSFTRST; 324 reg &= ~DWC3_DCTL_RUN_STOP; 325 dwc3_gadget_dctl_write_safe(dwc, reg); 326 327 /* 328 * For DWC_usb31 controller 1.90a and later, the DCTL.CSFRST bit 329 * is cleared only after all the clocks are synchronized. This can 330 * take a little more than 50ms. Set the polling rate at 20ms 331 * for 10 times instead. 332 */ 333 if (DWC3_VER_IS_WITHIN(DWC31, 190A, ANY) || DWC3_IP_IS(DWC32)) 334 retries = 10; 335 336 do { 337 reg = dwc3_readl(dwc->regs, DWC3_DCTL); 338 if (!(reg & DWC3_DCTL_CSFTRST)) 339 goto done; 340 341 if (DWC3_VER_IS_WITHIN(DWC31, 190A, ANY) || DWC3_IP_IS(DWC32)) 342 msleep(20); 343 else 344 udelay(1); 345 } while (--retries); 346 347 dev_warn(dwc->dev, "DWC3 controller soft reset failed.\n"); 348 return -ETIMEDOUT; 349 350 done: 351 /* 352 * For DWC_usb31 controller 1.80a and prior, once DCTL.CSFRST bit 353 * is cleared, we must wait at least 50ms before accessing the PHY 354 * domain (synchronization delay). 355 */ 356 if (DWC3_VER_IS_WITHIN(DWC31, ANY, 180A)) 357 msleep(50); 358 359 return 0; 360 } 361 362 /* 363 * dwc3_frame_length_adjustment - Adjusts frame length if required 364 * @dwc3: Pointer to our controller context structure 365 */ 366 static void dwc3_frame_length_adjustment(struct dwc3 *dwc) 367 { 368 u32 reg; 369 u32 dft; 370 371 if (DWC3_VER_IS_PRIOR(DWC3, 250A)) 372 return; 373 374 if (dwc->fladj == 0) 375 return; 376 377 reg = dwc3_readl(dwc->regs, DWC3_GFLADJ); 378 dft = reg & DWC3_GFLADJ_30MHZ_MASK; 379 if (dft != dwc->fladj) { 380 reg &= ~DWC3_GFLADJ_30MHZ_MASK; 381 reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | dwc->fladj; 382 dwc3_writel(dwc->regs, DWC3_GFLADJ, reg); 383 } 384 } 385 386 /** 387 * dwc3_ref_clk_period - Reference clock period configuration 388 * Default reference clock period depends on hardware 389 * configuration. For systems with reference clock that differs 390 * from the default, this will set clock period in DWC3_GUCTL 391 * register. 392 * @dwc: Pointer to our controller context structure 393 */ 394 static void dwc3_ref_clk_period(struct dwc3 *dwc) 395 { 396 unsigned long period; 397 unsigned long fladj; 398 unsigned long decr; 399 unsigned long rate; 400 u32 reg; 401 402 if (dwc->ref_clk) { 403 rate = clk_get_rate(dwc->ref_clk); 404 if (!rate) 405 return; 406 period = NSEC_PER_SEC / rate; 407 } else if (dwc->ref_clk_per) { 408 period = dwc->ref_clk_per; 409 rate = NSEC_PER_SEC / period; 410 } else { 411 return; 412 } 413 414 reg = dwc3_readl(dwc->regs, DWC3_GUCTL); 415 reg &= ~DWC3_GUCTL_REFCLKPER_MASK; 416 reg |= FIELD_PREP(DWC3_GUCTL_REFCLKPER_MASK, period); 417 dwc3_writel(dwc->regs, DWC3_GUCTL, reg); 418 419 if (DWC3_VER_IS_PRIOR(DWC3, 250A)) 420 return; 421 422 /* 423 * The calculation below is 424 * 425 * 125000 * (NSEC_PER_SEC / (rate * period) - 1) 426 * 427 * but rearranged for fixed-point arithmetic. The division must be 428 * 64-bit because 125000 * NSEC_PER_SEC doesn't fit in 32 bits (and 429 * neither does rate * period). 430 * 431 * Note that rate * period ~= NSEC_PER_SECOND, minus the number of 432 * nanoseconds of error caused by the truncation which happened during 433 * the division when calculating rate or period (whichever one was 434 * derived from the other). We first calculate the relative error, then 435 * scale it to units of 8 ppm. 436 */ 437 fladj = div64_u64(125000ULL * NSEC_PER_SEC, (u64)rate * period); 438 fladj -= 125000; 439 440 /* 441 * The documented 240MHz constant is scaled by 2 to get PLS1 as well. 442 */ 443 decr = 480000000 / rate; 444 445 reg = dwc3_readl(dwc->regs, DWC3_GFLADJ); 446 reg &= ~DWC3_GFLADJ_REFCLK_FLADJ_MASK 447 & ~DWC3_GFLADJ_240MHZDECR 448 & ~DWC3_GFLADJ_240MHZDECR_PLS1; 449 reg |= FIELD_PREP(DWC3_GFLADJ_REFCLK_FLADJ_MASK, fladj) 450 | FIELD_PREP(DWC3_GFLADJ_240MHZDECR, decr >> 1) 451 | FIELD_PREP(DWC3_GFLADJ_240MHZDECR_PLS1, decr & 1); 452 453 if (dwc->gfladj_refclk_lpm_sel) 454 reg |= DWC3_GFLADJ_REFCLK_LPM_SEL; 455 456 dwc3_writel(dwc->regs, DWC3_GFLADJ, reg); 457 } 458 459 /** 460 * dwc3_free_one_event_buffer - Frees one event buffer 461 * @dwc: Pointer to our controller context structure 462 * @evt: Pointer to event buffer to be freed 463 */ 464 static void dwc3_free_one_event_buffer(struct dwc3 *dwc, 465 struct dwc3_event_buffer *evt) 466 { 467 dma_free_coherent(dwc->sysdev, evt->length, evt->buf, evt->dma); 468 } 469 470 /** 471 * dwc3_alloc_one_event_buffer - Allocates one event buffer structure 472 * @dwc: Pointer to our controller context structure 473 * @length: size of the event buffer 474 * 475 * Returns a pointer to the allocated event buffer structure on success 476 * otherwise ERR_PTR(errno). 477 */ 478 static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, 479 unsigned int length) 480 { 481 struct dwc3_event_buffer *evt; 482 483 evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); 484 if (!evt) 485 return ERR_PTR(-ENOMEM); 486 487 evt->dwc = dwc; 488 evt->length = length; 489 evt->cache = devm_kzalloc(dwc->dev, length, GFP_KERNEL); 490 if (!evt->cache) 491 return ERR_PTR(-ENOMEM); 492 493 evt->buf = dma_alloc_coherent(dwc->sysdev, length, 494 &evt->dma, GFP_KERNEL); 495 if (!evt->buf) 496 return ERR_PTR(-ENOMEM); 497 498 return evt; 499 } 500 501 /** 502 * dwc3_free_event_buffers - frees all allocated event buffers 503 * @dwc: Pointer to our controller context structure 504 */ 505 static void dwc3_free_event_buffers(struct dwc3 *dwc) 506 { 507 struct dwc3_event_buffer *evt; 508 509 evt = dwc->ev_buf; 510 if (evt) 511 dwc3_free_one_event_buffer(dwc, evt); 512 } 513 514 /** 515 * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length 516 * @dwc: pointer to our controller context structure 517 * @length: size of event buffer 518 * 519 * Returns 0 on success otherwise negative errno. In the error case, dwc 520 * may contain some buffers allocated but not all which were requested. 521 */ 522 static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned int length) 523 { 524 struct dwc3_event_buffer *evt; 525 526 evt = dwc3_alloc_one_event_buffer(dwc, length); 527 if (IS_ERR(evt)) { 528 dev_err(dwc->dev, "can't allocate event buffer\n"); 529 return PTR_ERR(evt); 530 } 531 dwc->ev_buf = evt; 532 533 return 0; 534 } 535 536 /** 537 * dwc3_event_buffers_setup - setup our allocated event buffers 538 * @dwc: pointer to our controller context structure 539 * 540 * Returns 0 on success otherwise negative errno. 541 */ 542 int dwc3_event_buffers_setup(struct dwc3 *dwc) 543 { 544 struct dwc3_event_buffer *evt; 545 546 evt = dwc->ev_buf; 547 evt->lpos = 0; 548 dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 549 lower_32_bits(evt->dma)); 550 dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 551 upper_32_bits(evt->dma)); 552 dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), 553 DWC3_GEVNTSIZ_SIZE(evt->length)); 554 dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0); 555 556 return 0; 557 } 558 559 void dwc3_event_buffers_cleanup(struct dwc3 *dwc) 560 { 561 struct dwc3_event_buffer *evt; 562 563 evt = dwc->ev_buf; 564 565 evt->lpos = 0; 566 567 dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 0); 568 dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0); 569 dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK 570 | DWC3_GEVNTSIZ_SIZE(0)); 571 dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0); 572 } 573 574 static void dwc3_core_num_eps(struct dwc3 *dwc) 575 { 576 struct dwc3_hwparams *parms = &dwc->hwparams; 577 578 dwc->num_eps = DWC3_NUM_EPS(parms); 579 } 580 581 static void dwc3_cache_hwparams(struct dwc3 *dwc) 582 { 583 struct dwc3_hwparams *parms = &dwc->hwparams; 584 585 parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); 586 parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); 587 parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); 588 parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); 589 parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); 590 parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); 591 parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); 592 parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); 593 parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); 594 595 if (DWC3_IP_IS(DWC32)) 596 parms->hwparams9 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS9); 597 } 598 599 static int dwc3_core_ulpi_init(struct dwc3 *dwc) 600 { 601 int intf; 602 int ret = 0; 603 604 intf = DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3); 605 606 if (intf == DWC3_GHWPARAMS3_HSPHY_IFC_ULPI || 607 (intf == DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI && 608 dwc->hsphy_interface && 609 !strncmp(dwc->hsphy_interface, "ulpi", 4))) 610 ret = dwc3_ulpi_init(dwc); 611 612 return ret; 613 } 614 615 /** 616 * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core 617 * @dwc: Pointer to our controller context structure 618 * 619 * Returns 0 on success. The USB PHY interfaces are configured but not 620 * initialized. The PHY interfaces and the PHYs get initialized together with 621 * the core in dwc3_core_init. 622 */ 623 static int dwc3_phy_setup(struct dwc3 *dwc) 624 { 625 unsigned int hw_mode; 626 u32 reg; 627 628 hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); 629 630 reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 631 632 /* 633 * Make sure UX_EXIT_PX is cleared as that causes issues with some 634 * PHYs. Also, this bit is not supposed to be used in normal operation. 635 */ 636 reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX; 637 638 /* 639 * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY 640 * to '0' during coreConsultant configuration. So default value 641 * will be '0' when the core is reset. Application needs to set it 642 * to '1' after the core initialization is completed. 643 */ 644 if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) 645 reg |= DWC3_GUSB3PIPECTL_SUSPHY; 646 647 /* 648 * For DRD controllers, GUSB3PIPECTL.SUSPENDENABLE must be cleared after 649 * power-on reset, and it can be set after core initialization, which is 650 * after device soft-reset during initialization. 651 */ 652 if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD) 653 reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 654 655 if (dwc->u2ss_inp3_quirk) 656 reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK; 657 658 if (dwc->dis_rxdet_inp3_quirk) 659 reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3; 660 661 if (dwc->req_p1p2p3_quirk) 662 reg |= DWC3_GUSB3PIPECTL_REQP1P2P3; 663 664 if (dwc->del_p1p2p3_quirk) 665 reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN; 666 667 if (dwc->del_phy_power_chg_quirk) 668 reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE; 669 670 if (dwc->lfps_filter_quirk) 671 reg |= DWC3_GUSB3PIPECTL_LFPSFILT; 672 673 if (dwc->rx_detect_poll_quirk) 674 reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL; 675 676 if (dwc->tx_de_emphasis_quirk) 677 reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis); 678 679 if (dwc->dis_u3_susphy_quirk) 680 reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 681 682 if (dwc->dis_del_phy_power_chg_quirk) 683 reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE; 684 685 dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 686 687 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 688 689 /* Select the HS PHY interface */ 690 switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) { 691 case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI: 692 if (dwc->hsphy_interface && 693 !strncmp(dwc->hsphy_interface, "utmi", 4)) { 694 reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI; 695 break; 696 } else if (dwc->hsphy_interface && 697 !strncmp(dwc->hsphy_interface, "ulpi", 4)) { 698 reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI; 699 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 700 } else { 701 /* Relying on default value. */ 702 if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI)) 703 break; 704 } 705 fallthrough; 706 case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI: 707 default: 708 break; 709 } 710 711 switch (dwc->hsphy_mode) { 712 case USBPHY_INTERFACE_MODE_UTMI: 713 reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK | 714 DWC3_GUSB2PHYCFG_USBTRDTIM_MASK); 715 reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_8_BIT) | 716 DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_8_BIT); 717 break; 718 case USBPHY_INTERFACE_MODE_UTMIW: 719 reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK | 720 DWC3_GUSB2PHYCFG_USBTRDTIM_MASK); 721 reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_16_BIT) | 722 DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_16_BIT); 723 break; 724 default: 725 break; 726 } 727 728 /* 729 * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to 730 * '0' during coreConsultant configuration. So default value will 731 * be '0' when the core is reset. Application needs to set it to 732 * '1' after the core initialization is completed. 733 */ 734 if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) 735 reg |= DWC3_GUSB2PHYCFG_SUSPHY; 736 737 /* 738 * For DRD controllers, GUSB2PHYCFG.SUSPHY must be cleared after 739 * power-on reset, and it can be set after core initialization, which is 740 * after device soft-reset during initialization. 741 */ 742 if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD) 743 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 744 745 if (dwc->dis_u2_susphy_quirk) 746 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 747 748 if (dwc->dis_enblslpm_quirk) 749 reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM; 750 else 751 reg |= DWC3_GUSB2PHYCFG_ENBLSLPM; 752 753 if (dwc->dis_u2_freeclk_exists_quirk || dwc->gfladj_refclk_lpm_sel) 754 reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS; 755 756 /* 757 * Some ULPI USB PHY does not support internal VBUS supply, to drive 758 * the CPEN pin requires the configuration of the ULPI DRVVBUSEXTERNAL 759 * bit of OTG_CTRL register. Controller configures the USB2 PHY 760 * ULPIEXTVBUSDRV bit[17] of the GUSB2PHYCFG register to drive vBus 761 * with an external supply. 762 */ 763 if (dwc->ulpi_ext_vbus_drv) 764 reg |= DWC3_GUSB2PHYCFG_ULPIEXTVBUSDRV; 765 766 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 767 768 return 0; 769 } 770 771 static int dwc3_phy_init(struct dwc3 *dwc) 772 { 773 int ret; 774 775 usb_phy_init(dwc->usb2_phy); 776 usb_phy_init(dwc->usb3_phy); 777 778 ret = phy_init(dwc->usb2_generic_phy); 779 if (ret < 0) 780 goto err_shutdown_usb3_phy; 781 782 ret = phy_init(dwc->usb3_generic_phy); 783 if (ret < 0) 784 goto err_exit_usb2_phy; 785 786 return 0; 787 788 err_exit_usb2_phy: 789 phy_exit(dwc->usb2_generic_phy); 790 err_shutdown_usb3_phy: 791 usb_phy_shutdown(dwc->usb3_phy); 792 usb_phy_shutdown(dwc->usb2_phy); 793 794 return ret; 795 } 796 797 static void dwc3_phy_exit(struct dwc3 *dwc) 798 { 799 phy_exit(dwc->usb3_generic_phy); 800 phy_exit(dwc->usb2_generic_phy); 801 802 usb_phy_shutdown(dwc->usb3_phy); 803 usb_phy_shutdown(dwc->usb2_phy); 804 } 805 806 static int dwc3_phy_power_on(struct dwc3 *dwc) 807 { 808 int ret; 809 810 usb_phy_set_suspend(dwc->usb2_phy, 0); 811 usb_phy_set_suspend(dwc->usb3_phy, 0); 812 813 ret = phy_power_on(dwc->usb2_generic_phy); 814 if (ret < 0) 815 goto err_suspend_usb3_phy; 816 817 ret = phy_power_on(dwc->usb3_generic_phy); 818 if (ret < 0) 819 goto err_power_off_usb2_phy; 820 821 return 0; 822 823 err_power_off_usb2_phy: 824 phy_power_off(dwc->usb2_generic_phy); 825 err_suspend_usb3_phy: 826 usb_phy_set_suspend(dwc->usb3_phy, 1); 827 usb_phy_set_suspend(dwc->usb2_phy, 1); 828 829 return ret; 830 } 831 832 static void dwc3_phy_power_off(struct dwc3 *dwc) 833 { 834 phy_power_off(dwc->usb3_generic_phy); 835 phy_power_off(dwc->usb2_generic_phy); 836 837 usb_phy_set_suspend(dwc->usb3_phy, 1); 838 usb_phy_set_suspend(dwc->usb2_phy, 1); 839 } 840 841 static int dwc3_clk_enable(struct dwc3 *dwc) 842 { 843 int ret; 844 845 ret = clk_prepare_enable(dwc->bus_clk); 846 if (ret) 847 return ret; 848 849 ret = clk_prepare_enable(dwc->ref_clk); 850 if (ret) 851 goto disable_bus_clk; 852 853 ret = clk_prepare_enable(dwc->susp_clk); 854 if (ret) 855 goto disable_ref_clk; 856 857 return 0; 858 859 disable_ref_clk: 860 clk_disable_unprepare(dwc->ref_clk); 861 disable_bus_clk: 862 clk_disable_unprepare(dwc->bus_clk); 863 return ret; 864 } 865 866 static void dwc3_clk_disable(struct dwc3 *dwc) 867 { 868 clk_disable_unprepare(dwc->susp_clk); 869 clk_disable_unprepare(dwc->ref_clk); 870 clk_disable_unprepare(dwc->bus_clk); 871 } 872 873 static void dwc3_core_exit(struct dwc3 *dwc) 874 { 875 dwc3_event_buffers_cleanup(dwc); 876 dwc3_phy_power_off(dwc); 877 dwc3_phy_exit(dwc); 878 dwc3_clk_disable(dwc); 879 reset_control_assert(dwc->reset); 880 } 881 882 static bool dwc3_core_is_valid(struct dwc3 *dwc) 883 { 884 u32 reg; 885 886 reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); 887 dwc->ip = DWC3_GSNPS_ID(reg); 888 889 /* This should read as U3 followed by revision number */ 890 if (DWC3_IP_IS(DWC3)) { 891 dwc->revision = reg; 892 } else if (DWC3_IP_IS(DWC31) || DWC3_IP_IS(DWC32)) { 893 dwc->revision = dwc3_readl(dwc->regs, DWC3_VER_NUMBER); 894 dwc->version_type = dwc3_readl(dwc->regs, DWC3_VER_TYPE); 895 } else { 896 return false; 897 } 898 899 return true; 900 } 901 902 static void dwc3_core_setup_global_control(struct dwc3 *dwc) 903 { 904 u32 reg; 905 906 reg = dwc3_readl(dwc->regs, DWC3_GCTL); 907 reg &= ~DWC3_GCTL_SCALEDOWN_MASK; 908 909 switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { 910 case DWC3_GHWPARAMS1_EN_PWROPT_CLK: 911 /** 912 * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an 913 * issue which would cause xHCI compliance tests to fail. 914 * 915 * Because of that we cannot enable clock gating on such 916 * configurations. 917 * 918 * Refers to: 919 * 920 * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based 921 * SOF/ITP Mode Used 922 */ 923 if ((dwc->dr_mode == USB_DR_MODE_HOST || 924 dwc->dr_mode == USB_DR_MODE_OTG) && 925 DWC3_VER_IS_WITHIN(DWC3, 210A, 250A)) 926 reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC; 927 else 928 reg &= ~DWC3_GCTL_DSBLCLKGTNG; 929 break; 930 case DWC3_GHWPARAMS1_EN_PWROPT_HIB: 931 /* 932 * REVISIT Enabling this bit so that host-mode hibernation 933 * will work. Device-mode hibernation is not yet implemented. 934 */ 935 reg |= DWC3_GCTL_GBLHIBERNATIONEN; 936 break; 937 default: 938 /* nothing */ 939 break; 940 } 941 942 /* check if current dwc3 is on simulation board */ 943 if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) { 944 dev_info(dwc->dev, "Running with FPGA optimizations\n"); 945 dwc->is_fpga = true; 946 } 947 948 WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga, 949 "disable_scramble cannot be used on non-FPGA builds\n"); 950 951 if (dwc->disable_scramble_quirk && dwc->is_fpga) 952 reg |= DWC3_GCTL_DISSCRAMBLE; 953 else 954 reg &= ~DWC3_GCTL_DISSCRAMBLE; 955 956 if (dwc->u2exit_lfps_quirk) 957 reg |= DWC3_GCTL_U2EXIT_LFPS; 958 959 /* 960 * WORKAROUND: DWC3 revisions <1.90a have a bug 961 * where the device can fail to connect at SuperSpeed 962 * and falls back to high-speed mode which causes 963 * the device to enter a Connect/Disconnect loop 964 */ 965 if (DWC3_VER_IS_PRIOR(DWC3, 190A)) 966 reg |= DWC3_GCTL_U2RSTECN; 967 968 dwc3_writel(dwc->regs, DWC3_GCTL, reg); 969 } 970 971 static int dwc3_core_get_phy(struct dwc3 *dwc); 972 static int dwc3_core_ulpi_init(struct dwc3 *dwc); 973 974 /* set global incr burst type configuration registers */ 975 static void dwc3_set_incr_burst_type(struct dwc3 *dwc) 976 { 977 struct device *dev = dwc->dev; 978 /* incrx_mode : for INCR burst type. */ 979 bool incrx_mode; 980 /* incrx_size : for size of INCRX burst. */ 981 u32 incrx_size; 982 u32 *vals; 983 u32 cfg; 984 int ntype; 985 int ret; 986 int i; 987 988 cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0); 989 990 /* 991 * Handle property "snps,incr-burst-type-adjustment". 992 * Get the number of value from this property: 993 * result <= 0, means this property is not supported. 994 * result = 1, means INCRx burst mode supported. 995 * result > 1, means undefined length burst mode supported. 996 */ 997 ntype = device_property_count_u32(dev, "snps,incr-burst-type-adjustment"); 998 if (ntype <= 0) 999 return; 1000 1001 vals = kcalloc(ntype, sizeof(u32), GFP_KERNEL); 1002 if (!vals) 1003 return; 1004 1005 /* Get INCR burst type, and parse it */ 1006 ret = device_property_read_u32_array(dev, 1007 "snps,incr-burst-type-adjustment", vals, ntype); 1008 if (ret) { 1009 kfree(vals); 1010 dev_err(dev, "Error to get property\n"); 1011 return; 1012 } 1013 1014 incrx_size = *vals; 1015 1016 if (ntype > 1) { 1017 /* INCRX (undefined length) burst mode */ 1018 incrx_mode = INCRX_UNDEF_LENGTH_BURST_MODE; 1019 for (i = 1; i < ntype; i++) { 1020 if (vals[i] > incrx_size) 1021 incrx_size = vals[i]; 1022 } 1023 } else { 1024 /* INCRX burst mode */ 1025 incrx_mode = INCRX_BURST_MODE; 1026 } 1027 1028 kfree(vals); 1029 1030 /* Enable Undefined Length INCR Burst and Enable INCRx Burst */ 1031 cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK; 1032 if (incrx_mode) 1033 cfg |= DWC3_GSBUSCFG0_INCRBRSTENA; 1034 switch (incrx_size) { 1035 case 256: 1036 cfg |= DWC3_GSBUSCFG0_INCR256BRSTENA; 1037 break; 1038 case 128: 1039 cfg |= DWC3_GSBUSCFG0_INCR128BRSTENA; 1040 break; 1041 case 64: 1042 cfg |= DWC3_GSBUSCFG0_INCR64BRSTENA; 1043 break; 1044 case 32: 1045 cfg |= DWC3_GSBUSCFG0_INCR32BRSTENA; 1046 break; 1047 case 16: 1048 cfg |= DWC3_GSBUSCFG0_INCR16BRSTENA; 1049 break; 1050 case 8: 1051 cfg |= DWC3_GSBUSCFG0_INCR8BRSTENA; 1052 break; 1053 case 4: 1054 cfg |= DWC3_GSBUSCFG0_INCR4BRSTENA; 1055 break; 1056 case 1: 1057 break; 1058 default: 1059 dev_err(dev, "Invalid property\n"); 1060 break; 1061 } 1062 1063 dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, cfg); 1064 } 1065 1066 static void dwc3_set_power_down_clk_scale(struct dwc3 *dwc) 1067 { 1068 u32 scale; 1069 u32 reg; 1070 1071 if (!dwc->susp_clk) 1072 return; 1073 1074 /* 1075 * The power down scale field specifies how many suspend_clk 1076 * periods fit into a 16KHz clock period. When performing 1077 * the division, round up the remainder. 1078 * 1079 * The power down scale value is calculated using the fastest 1080 * frequency of the suspend_clk. If it isn't fixed (but within 1081 * the accuracy requirement), the driver may not know the max 1082 * rate of the suspend_clk, so only update the power down scale 1083 * if the default is less than the calculated value from 1084 * clk_get_rate() or if the default is questionably high 1085 * (3x or more) to be within the requirement. 1086 */ 1087 scale = DIV_ROUND_UP(clk_get_rate(dwc->susp_clk), 16000); 1088 reg = dwc3_readl(dwc->regs, DWC3_GCTL); 1089 if ((reg & DWC3_GCTL_PWRDNSCALE_MASK) < DWC3_GCTL_PWRDNSCALE(scale) || 1090 (reg & DWC3_GCTL_PWRDNSCALE_MASK) > DWC3_GCTL_PWRDNSCALE(scale*3)) { 1091 reg &= ~(DWC3_GCTL_PWRDNSCALE_MASK); 1092 reg |= DWC3_GCTL_PWRDNSCALE(scale); 1093 dwc3_writel(dwc->regs, DWC3_GCTL, reg); 1094 } 1095 } 1096 1097 static void dwc3_config_threshold(struct dwc3 *dwc) 1098 { 1099 u32 reg; 1100 u8 rx_thr_num; 1101 u8 rx_maxburst; 1102 u8 tx_thr_num; 1103 u8 tx_maxburst; 1104 1105 /* 1106 * Must config both number of packets and max burst settings to enable 1107 * RX and/or TX threshold. 1108 */ 1109 if (!DWC3_IP_IS(DWC3) && dwc->dr_mode == USB_DR_MODE_HOST) { 1110 rx_thr_num = dwc->rx_thr_num_pkt_prd; 1111 rx_maxburst = dwc->rx_max_burst_prd; 1112 tx_thr_num = dwc->tx_thr_num_pkt_prd; 1113 tx_maxburst = dwc->tx_max_burst_prd; 1114 1115 if (rx_thr_num && rx_maxburst) { 1116 reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG); 1117 reg |= DWC31_RXTHRNUMPKTSEL_PRD; 1118 1119 reg &= ~DWC31_RXTHRNUMPKT_PRD(~0); 1120 reg |= DWC31_RXTHRNUMPKT_PRD(rx_thr_num); 1121 1122 reg &= ~DWC31_MAXRXBURSTSIZE_PRD(~0); 1123 reg |= DWC31_MAXRXBURSTSIZE_PRD(rx_maxburst); 1124 1125 dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg); 1126 } 1127 1128 if (tx_thr_num && tx_maxburst) { 1129 reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG); 1130 reg |= DWC31_TXTHRNUMPKTSEL_PRD; 1131 1132 reg &= ~DWC31_TXTHRNUMPKT_PRD(~0); 1133 reg |= DWC31_TXTHRNUMPKT_PRD(tx_thr_num); 1134 1135 reg &= ~DWC31_MAXTXBURSTSIZE_PRD(~0); 1136 reg |= DWC31_MAXTXBURSTSIZE_PRD(tx_maxburst); 1137 1138 dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg); 1139 } 1140 } 1141 1142 rx_thr_num = dwc->rx_thr_num_pkt; 1143 rx_maxburst = dwc->rx_max_burst; 1144 tx_thr_num = dwc->tx_thr_num_pkt; 1145 tx_maxburst = dwc->tx_max_burst; 1146 1147 if (DWC3_IP_IS(DWC3)) { 1148 if (rx_thr_num && rx_maxburst) { 1149 reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG); 1150 reg |= DWC3_GRXTHRCFG_PKTCNTSEL; 1151 1152 reg &= ~DWC3_GRXTHRCFG_RXPKTCNT(~0); 1153 reg |= DWC3_GRXTHRCFG_RXPKTCNT(rx_thr_num); 1154 1155 reg &= ~DWC3_GRXTHRCFG_MAXRXBURSTSIZE(~0); 1156 reg |= DWC3_GRXTHRCFG_MAXRXBURSTSIZE(rx_maxburst); 1157 1158 dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg); 1159 } 1160 1161 if (tx_thr_num && tx_maxburst) { 1162 reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG); 1163 reg |= DWC3_GTXTHRCFG_PKTCNTSEL; 1164 1165 reg &= ~DWC3_GTXTHRCFG_TXPKTCNT(~0); 1166 reg |= DWC3_GTXTHRCFG_TXPKTCNT(tx_thr_num); 1167 1168 reg &= ~DWC3_GTXTHRCFG_MAXTXBURSTSIZE(~0); 1169 reg |= DWC3_GTXTHRCFG_MAXTXBURSTSIZE(tx_maxburst); 1170 1171 dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg); 1172 } 1173 } else { 1174 if (rx_thr_num && rx_maxburst) { 1175 reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG); 1176 reg |= DWC31_GRXTHRCFG_PKTCNTSEL; 1177 1178 reg &= ~DWC31_GRXTHRCFG_RXPKTCNT(~0); 1179 reg |= DWC31_GRXTHRCFG_RXPKTCNT(rx_thr_num); 1180 1181 reg &= ~DWC31_GRXTHRCFG_MAXRXBURSTSIZE(~0); 1182 reg |= DWC31_GRXTHRCFG_MAXRXBURSTSIZE(rx_maxburst); 1183 1184 dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg); 1185 } 1186 1187 if (tx_thr_num && tx_maxburst) { 1188 reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG); 1189 reg |= DWC31_GTXTHRCFG_PKTCNTSEL; 1190 1191 reg &= ~DWC31_GTXTHRCFG_TXPKTCNT(~0); 1192 reg |= DWC31_GTXTHRCFG_TXPKTCNT(tx_thr_num); 1193 1194 reg &= ~DWC31_GTXTHRCFG_MAXTXBURSTSIZE(~0); 1195 reg |= DWC31_GTXTHRCFG_MAXTXBURSTSIZE(tx_maxburst); 1196 1197 dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg); 1198 } 1199 } 1200 } 1201 1202 /** 1203 * dwc3_core_init - Low-level initialization of DWC3 Core 1204 * @dwc: Pointer to our controller context structure 1205 * 1206 * Returns 0 on success otherwise negative errno. 1207 */ 1208 static int dwc3_core_init(struct dwc3 *dwc) 1209 { 1210 unsigned int hw_mode; 1211 u32 reg; 1212 int ret; 1213 1214 hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); 1215 1216 /* 1217 * Write Linux Version Code to our GUID register so it's easy to figure 1218 * out which kernel version a bug was found. 1219 */ 1220 dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); 1221 1222 ret = dwc3_phy_setup(dwc); 1223 if (ret) 1224 return ret; 1225 1226 if (!dwc->ulpi_ready) { 1227 ret = dwc3_core_ulpi_init(dwc); 1228 if (ret) { 1229 if (ret == -ETIMEDOUT) { 1230 dwc3_core_soft_reset(dwc); 1231 ret = -EPROBE_DEFER; 1232 } 1233 return ret; 1234 } 1235 dwc->ulpi_ready = true; 1236 } 1237 1238 if (!dwc->phys_ready) { 1239 ret = dwc3_core_get_phy(dwc); 1240 if (ret) 1241 goto err_exit_ulpi; 1242 dwc->phys_ready = true; 1243 } 1244 1245 ret = dwc3_phy_init(dwc); 1246 if (ret) 1247 goto err_exit_ulpi; 1248 1249 ret = dwc3_core_soft_reset(dwc); 1250 if (ret) 1251 goto err_exit_phy; 1252 1253 if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD && 1254 !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) { 1255 if (!dwc->dis_u3_susphy_quirk) { 1256 reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 1257 reg |= DWC3_GUSB3PIPECTL_SUSPHY; 1258 dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 1259 } 1260 1261 if (!dwc->dis_u2_susphy_quirk) { 1262 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 1263 reg |= DWC3_GUSB2PHYCFG_SUSPHY; 1264 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 1265 } 1266 } 1267 1268 dwc3_core_setup_global_control(dwc); 1269 dwc3_core_num_eps(dwc); 1270 1271 /* Set power down scale of suspend_clk */ 1272 dwc3_set_power_down_clk_scale(dwc); 1273 1274 /* Adjust Frame Length */ 1275 dwc3_frame_length_adjustment(dwc); 1276 1277 /* Adjust Reference Clock Period */ 1278 dwc3_ref_clk_period(dwc); 1279 1280 dwc3_set_incr_burst_type(dwc); 1281 1282 ret = dwc3_phy_power_on(dwc); 1283 if (ret) 1284 goto err_exit_phy; 1285 1286 ret = dwc3_event_buffers_setup(dwc); 1287 if (ret) { 1288 dev_err(dwc->dev, "failed to setup event buffers\n"); 1289 goto err_power_off_phy; 1290 } 1291 1292 /* 1293 * ENDXFER polling is available on version 3.10a and later of 1294 * the DWC_usb3 controller. It is NOT available in the 1295 * DWC_usb31 controller. 1296 */ 1297 if (DWC3_VER_IS_WITHIN(DWC3, 310A, ANY)) { 1298 reg = dwc3_readl(dwc->regs, DWC3_GUCTL2); 1299 reg |= DWC3_GUCTL2_RST_ACTBITLATER; 1300 dwc3_writel(dwc->regs, DWC3_GUCTL2, reg); 1301 } 1302 1303 /* 1304 * When configured in HOST mode, after issuing U3/L2 exit controller 1305 * fails to send proper CRC checksum in CRC5 feild. Because of this 1306 * behaviour Transaction Error is generated, resulting in reset and 1307 * re-enumeration of usb device attached. All the termsel, xcvrsel, 1308 * opmode becomes 0 during end of resume. Enabling bit 10 of GUCTL1 1309 * will correct this problem. This option is to support certain 1310 * legacy ULPI PHYs. 1311 */ 1312 if (dwc->resume_hs_terminations) { 1313 reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); 1314 reg |= DWC3_GUCTL1_RESUME_OPMODE_HS_HOST; 1315 dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); 1316 } 1317 1318 if (!DWC3_VER_IS_PRIOR(DWC3, 250A)) { 1319 reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); 1320 1321 /* 1322 * Enable hardware control of sending remote wakeup 1323 * in HS when the device is in the L1 state. 1324 */ 1325 if (!DWC3_VER_IS_PRIOR(DWC3, 290A)) 1326 reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW; 1327 1328 /* 1329 * Decouple USB 2.0 L1 & L2 events which will allow for 1330 * gadget driver to only receive U3/L2 suspend & wakeup 1331 * events and prevent the more frequent L1 LPM transitions 1332 * from interrupting the driver. 1333 */ 1334 if (!DWC3_VER_IS_PRIOR(DWC3, 300A)) 1335 reg |= DWC3_GUCTL1_DEV_DECOUPLE_L1L2_EVT; 1336 1337 if (dwc->dis_tx_ipgap_linecheck_quirk) 1338 reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS; 1339 1340 if (dwc->parkmode_disable_ss_quirk) 1341 reg |= DWC3_GUCTL1_PARKMODE_DISABLE_SS; 1342 1343 if (dwc->parkmode_disable_hs_quirk) 1344 reg |= DWC3_GUCTL1_PARKMODE_DISABLE_HS; 1345 1346 if (DWC3_VER_IS_WITHIN(DWC3, 290A, ANY) && 1347 (dwc->maximum_speed == USB_SPEED_HIGH || 1348 dwc->maximum_speed == USB_SPEED_FULL)) 1349 reg |= DWC3_GUCTL1_DEV_FORCE_20_CLK_FOR_30_CLK; 1350 1351 dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); 1352 } 1353 1354 dwc3_config_threshold(dwc); 1355 1356 return 0; 1357 1358 err_power_off_phy: 1359 dwc3_phy_power_off(dwc); 1360 err_exit_phy: 1361 dwc3_phy_exit(dwc); 1362 err_exit_ulpi: 1363 dwc3_ulpi_exit(dwc); 1364 1365 return ret; 1366 } 1367 1368 static int dwc3_core_get_phy(struct dwc3 *dwc) 1369 { 1370 struct device *dev = dwc->dev; 1371 struct device_node *node = dev->of_node; 1372 int ret; 1373 1374 if (node) { 1375 dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); 1376 dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); 1377 } else { 1378 dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); 1379 dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); 1380 } 1381 1382 if (IS_ERR(dwc->usb2_phy)) { 1383 ret = PTR_ERR(dwc->usb2_phy); 1384 if (ret == -ENXIO || ret == -ENODEV) 1385 dwc->usb2_phy = NULL; 1386 else 1387 return dev_err_probe(dev, ret, "no usb2 phy configured\n"); 1388 } 1389 1390 if (IS_ERR(dwc->usb3_phy)) { 1391 ret = PTR_ERR(dwc->usb3_phy); 1392 if (ret == -ENXIO || ret == -ENODEV) 1393 dwc->usb3_phy = NULL; 1394 else 1395 return dev_err_probe(dev, ret, "no usb3 phy configured\n"); 1396 } 1397 1398 dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy"); 1399 if (IS_ERR(dwc->usb2_generic_phy)) { 1400 ret = PTR_ERR(dwc->usb2_generic_phy); 1401 if (ret == -ENOSYS || ret == -ENODEV) 1402 dwc->usb2_generic_phy = NULL; 1403 else 1404 return dev_err_probe(dev, ret, "no usb2 phy configured\n"); 1405 } 1406 1407 dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy"); 1408 if (IS_ERR(dwc->usb3_generic_phy)) { 1409 ret = PTR_ERR(dwc->usb3_generic_phy); 1410 if (ret == -ENOSYS || ret == -ENODEV) 1411 dwc->usb3_generic_phy = NULL; 1412 else 1413 return dev_err_probe(dev, ret, "no usb3 phy configured\n"); 1414 } 1415 1416 return 0; 1417 } 1418 1419 static int dwc3_core_init_mode(struct dwc3 *dwc) 1420 { 1421 struct device *dev = dwc->dev; 1422 int ret; 1423 1424 switch (dwc->dr_mode) { 1425 case USB_DR_MODE_PERIPHERAL: 1426 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); 1427 1428 if (dwc->usb2_phy) 1429 otg_set_vbus(dwc->usb2_phy->otg, false); 1430 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE); 1431 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE); 1432 1433 ret = dwc3_gadget_init(dwc); 1434 if (ret) 1435 return dev_err_probe(dev, ret, "failed to initialize gadget\n"); 1436 break; 1437 case USB_DR_MODE_HOST: 1438 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); 1439 1440 if (dwc->usb2_phy) 1441 otg_set_vbus(dwc->usb2_phy->otg, true); 1442 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); 1443 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); 1444 1445 ret = dwc3_host_init(dwc); 1446 if (ret) 1447 return dev_err_probe(dev, ret, "failed to initialize host\n"); 1448 break; 1449 case USB_DR_MODE_OTG: 1450 INIT_WORK(&dwc->drd_work, __dwc3_set_mode); 1451 ret = dwc3_drd_init(dwc); 1452 if (ret) 1453 return dev_err_probe(dev, ret, "failed to initialize dual-role\n"); 1454 break; 1455 default: 1456 dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode); 1457 return -EINVAL; 1458 } 1459 1460 return 0; 1461 } 1462 1463 static void dwc3_core_exit_mode(struct dwc3 *dwc) 1464 { 1465 switch (dwc->dr_mode) { 1466 case USB_DR_MODE_PERIPHERAL: 1467 dwc3_gadget_exit(dwc); 1468 break; 1469 case USB_DR_MODE_HOST: 1470 dwc3_host_exit(dwc); 1471 break; 1472 case USB_DR_MODE_OTG: 1473 dwc3_drd_exit(dwc); 1474 break; 1475 default: 1476 /* do nothing */ 1477 break; 1478 } 1479 1480 /* de-assert DRVVBUS for HOST and OTG mode */ 1481 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); 1482 } 1483 1484 static void dwc3_get_properties(struct dwc3 *dwc) 1485 { 1486 struct device *dev = dwc->dev; 1487 u8 lpm_nyet_threshold; 1488 u8 tx_de_emphasis; 1489 u8 hird_threshold; 1490 u8 rx_thr_num_pkt = 0; 1491 u8 rx_max_burst = 0; 1492 u8 tx_thr_num_pkt = 0; 1493 u8 tx_max_burst = 0; 1494 u8 rx_thr_num_pkt_prd = 0; 1495 u8 rx_max_burst_prd = 0; 1496 u8 tx_thr_num_pkt_prd = 0; 1497 u8 tx_max_burst_prd = 0; 1498 u8 tx_fifo_resize_max_num; 1499 const char *usb_psy_name; 1500 int ret; 1501 1502 /* default to highest possible threshold */ 1503 lpm_nyet_threshold = 0xf; 1504 1505 /* default to -3.5dB de-emphasis */ 1506 tx_de_emphasis = 1; 1507 1508 /* 1509 * default to assert utmi_sleep_n and use maximum allowed HIRD 1510 * threshold value of 0b1100 1511 */ 1512 hird_threshold = 12; 1513 1514 /* 1515 * default to a TXFIFO size large enough to fit 6 max packets. This 1516 * allows for systems with larger bus latencies to have some headroom 1517 * for endpoints that have a large bMaxBurst value. 1518 */ 1519 tx_fifo_resize_max_num = 6; 1520 1521 dwc->maximum_speed = usb_get_maximum_speed(dev); 1522 dwc->max_ssp_rate = usb_get_maximum_ssp_rate(dev); 1523 dwc->dr_mode = usb_get_dr_mode(dev); 1524 dwc->hsphy_mode = of_usb_get_phy_mode(dev->of_node); 1525 1526 dwc->sysdev_is_parent = device_property_read_bool(dev, 1527 "linux,sysdev_is_parent"); 1528 if (dwc->sysdev_is_parent) 1529 dwc->sysdev = dwc->dev->parent; 1530 else 1531 dwc->sysdev = dwc->dev; 1532 1533 ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name); 1534 if (ret >= 0) { 1535 dwc->usb_psy = power_supply_get_by_name(usb_psy_name); 1536 if (!dwc->usb_psy) 1537 dev_err(dev, "couldn't get usb power supply\n"); 1538 } 1539 1540 dwc->has_lpm_erratum = device_property_read_bool(dev, 1541 "snps,has-lpm-erratum"); 1542 device_property_read_u8(dev, "snps,lpm-nyet-threshold", 1543 &lpm_nyet_threshold); 1544 dwc->is_utmi_l1_suspend = device_property_read_bool(dev, 1545 "snps,is-utmi-l1-suspend"); 1546 device_property_read_u8(dev, "snps,hird-threshold", 1547 &hird_threshold); 1548 dwc->dis_start_transfer_quirk = device_property_read_bool(dev, 1549 "snps,dis-start-transfer-quirk"); 1550 dwc->usb3_lpm_capable = device_property_read_bool(dev, 1551 "snps,usb3_lpm_capable"); 1552 dwc->usb2_lpm_disable = device_property_read_bool(dev, 1553 "snps,usb2-lpm-disable"); 1554 dwc->usb2_gadget_lpm_disable = device_property_read_bool(dev, 1555 "snps,usb2-gadget-lpm-disable"); 1556 device_property_read_u8(dev, "snps,rx-thr-num-pkt", 1557 &rx_thr_num_pkt); 1558 device_property_read_u8(dev, "snps,rx-max-burst", 1559 &rx_max_burst); 1560 device_property_read_u8(dev, "snps,tx-thr-num-pkt", 1561 &tx_thr_num_pkt); 1562 device_property_read_u8(dev, "snps,tx-max-burst", 1563 &tx_max_burst); 1564 device_property_read_u8(dev, "snps,rx-thr-num-pkt-prd", 1565 &rx_thr_num_pkt_prd); 1566 device_property_read_u8(dev, "snps,rx-max-burst-prd", 1567 &rx_max_burst_prd); 1568 device_property_read_u8(dev, "snps,tx-thr-num-pkt-prd", 1569 &tx_thr_num_pkt_prd); 1570 device_property_read_u8(dev, "snps,tx-max-burst-prd", 1571 &tx_max_burst_prd); 1572 dwc->do_fifo_resize = device_property_read_bool(dev, 1573 "tx-fifo-resize"); 1574 if (dwc->do_fifo_resize) 1575 device_property_read_u8(dev, "tx-fifo-max-num", 1576 &tx_fifo_resize_max_num); 1577 1578 dwc->disable_scramble_quirk = device_property_read_bool(dev, 1579 "snps,disable_scramble_quirk"); 1580 dwc->u2exit_lfps_quirk = device_property_read_bool(dev, 1581 "snps,u2exit_lfps_quirk"); 1582 dwc->u2ss_inp3_quirk = device_property_read_bool(dev, 1583 "snps,u2ss_inp3_quirk"); 1584 dwc->req_p1p2p3_quirk = device_property_read_bool(dev, 1585 "snps,req_p1p2p3_quirk"); 1586 dwc->del_p1p2p3_quirk = device_property_read_bool(dev, 1587 "snps,del_p1p2p3_quirk"); 1588 dwc->del_phy_power_chg_quirk = device_property_read_bool(dev, 1589 "snps,del_phy_power_chg_quirk"); 1590 dwc->lfps_filter_quirk = device_property_read_bool(dev, 1591 "snps,lfps_filter_quirk"); 1592 dwc->rx_detect_poll_quirk = device_property_read_bool(dev, 1593 "snps,rx_detect_poll_quirk"); 1594 dwc->dis_u3_susphy_quirk = device_property_read_bool(dev, 1595 "snps,dis_u3_susphy_quirk"); 1596 dwc->dis_u2_susphy_quirk = device_property_read_bool(dev, 1597 "snps,dis_u2_susphy_quirk"); 1598 dwc->dis_enblslpm_quirk = device_property_read_bool(dev, 1599 "snps,dis_enblslpm_quirk"); 1600 dwc->dis_u1_entry_quirk = device_property_read_bool(dev, 1601 "snps,dis-u1-entry-quirk"); 1602 dwc->dis_u2_entry_quirk = device_property_read_bool(dev, 1603 "snps,dis-u2-entry-quirk"); 1604 dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev, 1605 "snps,dis_rxdet_inp3_quirk"); 1606 dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev, 1607 "snps,dis-u2-freeclk-exists-quirk"); 1608 dwc->dis_del_phy_power_chg_quirk = device_property_read_bool(dev, 1609 "snps,dis-del-phy-power-chg-quirk"); 1610 dwc->dis_tx_ipgap_linecheck_quirk = device_property_read_bool(dev, 1611 "snps,dis-tx-ipgap-linecheck-quirk"); 1612 dwc->resume_hs_terminations = device_property_read_bool(dev, 1613 "snps,resume-hs-terminations"); 1614 dwc->ulpi_ext_vbus_drv = device_property_read_bool(dev, 1615 "snps,ulpi-ext-vbus-drv"); 1616 dwc->parkmode_disable_ss_quirk = device_property_read_bool(dev, 1617 "snps,parkmode-disable-ss-quirk"); 1618 dwc->parkmode_disable_hs_quirk = device_property_read_bool(dev, 1619 "snps,parkmode-disable-hs-quirk"); 1620 dwc->gfladj_refclk_lpm_sel = device_property_read_bool(dev, 1621 "snps,gfladj-refclk-lpm-sel-quirk"); 1622 1623 dwc->tx_de_emphasis_quirk = device_property_read_bool(dev, 1624 "snps,tx_de_emphasis_quirk"); 1625 device_property_read_u8(dev, "snps,tx_de_emphasis", 1626 &tx_de_emphasis); 1627 device_property_read_string(dev, "snps,hsphy_interface", 1628 &dwc->hsphy_interface); 1629 device_property_read_u32(dev, "snps,quirk-frame-length-adjustment", 1630 &dwc->fladj); 1631 device_property_read_u32(dev, "snps,ref-clock-period-ns", 1632 &dwc->ref_clk_per); 1633 1634 dwc->dis_metastability_quirk = device_property_read_bool(dev, 1635 "snps,dis_metastability_quirk"); 1636 1637 dwc->dis_split_quirk = device_property_read_bool(dev, 1638 "snps,dis-split-quirk"); 1639 1640 dwc->lpm_nyet_threshold = lpm_nyet_threshold; 1641 dwc->tx_de_emphasis = tx_de_emphasis; 1642 1643 dwc->hird_threshold = hird_threshold; 1644 1645 dwc->rx_thr_num_pkt = rx_thr_num_pkt; 1646 dwc->rx_max_burst = rx_max_burst; 1647 1648 dwc->tx_thr_num_pkt = tx_thr_num_pkt; 1649 dwc->tx_max_burst = tx_max_burst; 1650 1651 dwc->rx_thr_num_pkt_prd = rx_thr_num_pkt_prd; 1652 dwc->rx_max_burst_prd = rx_max_burst_prd; 1653 1654 dwc->tx_thr_num_pkt_prd = tx_thr_num_pkt_prd; 1655 dwc->tx_max_burst_prd = tx_max_burst_prd; 1656 1657 dwc->imod_interval = 0; 1658 1659 dwc->tx_fifo_resize_max_num = tx_fifo_resize_max_num; 1660 } 1661 1662 /* check whether the core supports IMOD */ 1663 bool dwc3_has_imod(struct dwc3 *dwc) 1664 { 1665 return DWC3_VER_IS_WITHIN(DWC3, 300A, ANY) || 1666 DWC3_VER_IS_WITHIN(DWC31, 120A, ANY) || 1667 DWC3_IP_IS(DWC32); 1668 } 1669 1670 static void dwc3_check_params(struct dwc3 *dwc) 1671 { 1672 struct device *dev = dwc->dev; 1673 unsigned int hwparam_gen = 1674 DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3); 1675 1676 /* Check for proper value of imod_interval */ 1677 if (dwc->imod_interval && !dwc3_has_imod(dwc)) { 1678 dev_warn(dwc->dev, "Interrupt moderation not supported\n"); 1679 dwc->imod_interval = 0; 1680 } 1681 1682 /* 1683 * Workaround for STAR 9000961433 which affects only version 1684 * 3.00a of the DWC_usb3 core. This prevents the controller 1685 * interrupt from being masked while handling events. IMOD 1686 * allows us to work around this issue. Enable it for the 1687 * affected version. 1688 */ 1689 if (!dwc->imod_interval && 1690 DWC3_VER_IS(DWC3, 300A)) 1691 dwc->imod_interval = 1; 1692 1693 /* Check the maximum_speed parameter */ 1694 switch (dwc->maximum_speed) { 1695 case USB_SPEED_FULL: 1696 case USB_SPEED_HIGH: 1697 break; 1698 case USB_SPEED_SUPER: 1699 if (hwparam_gen == DWC3_GHWPARAMS3_SSPHY_IFC_DIS) 1700 dev_warn(dev, "UDC doesn't support Gen 1\n"); 1701 break; 1702 case USB_SPEED_SUPER_PLUS: 1703 if ((DWC3_IP_IS(DWC32) && 1704 hwparam_gen == DWC3_GHWPARAMS3_SSPHY_IFC_DIS) || 1705 (!DWC3_IP_IS(DWC32) && 1706 hwparam_gen != DWC3_GHWPARAMS3_SSPHY_IFC_GEN2)) 1707 dev_warn(dev, "UDC doesn't support SSP\n"); 1708 break; 1709 default: 1710 dev_err(dev, "invalid maximum_speed parameter %d\n", 1711 dwc->maximum_speed); 1712 fallthrough; 1713 case USB_SPEED_UNKNOWN: 1714 switch (hwparam_gen) { 1715 case DWC3_GHWPARAMS3_SSPHY_IFC_GEN2: 1716 dwc->maximum_speed = USB_SPEED_SUPER_PLUS; 1717 break; 1718 case DWC3_GHWPARAMS3_SSPHY_IFC_GEN1: 1719 if (DWC3_IP_IS(DWC32)) 1720 dwc->maximum_speed = USB_SPEED_SUPER_PLUS; 1721 else 1722 dwc->maximum_speed = USB_SPEED_SUPER; 1723 break; 1724 case DWC3_GHWPARAMS3_SSPHY_IFC_DIS: 1725 dwc->maximum_speed = USB_SPEED_HIGH; 1726 break; 1727 default: 1728 dwc->maximum_speed = USB_SPEED_SUPER; 1729 break; 1730 } 1731 break; 1732 } 1733 1734 /* 1735 * Currently the controller does not have visibility into the HW 1736 * parameter to determine the maximum number of lanes the HW supports. 1737 * If the number of lanes is not specified in the device property, then 1738 * set the default to support dual-lane for DWC_usb32 and single-lane 1739 * for DWC_usb31 for super-speed-plus. 1740 */ 1741 if (dwc->maximum_speed == USB_SPEED_SUPER_PLUS) { 1742 switch (dwc->max_ssp_rate) { 1743 case USB_SSP_GEN_2x1: 1744 if (hwparam_gen == DWC3_GHWPARAMS3_SSPHY_IFC_GEN1) 1745 dev_warn(dev, "UDC only supports Gen 1\n"); 1746 break; 1747 case USB_SSP_GEN_1x2: 1748 case USB_SSP_GEN_2x2: 1749 if (DWC3_IP_IS(DWC31)) 1750 dev_warn(dev, "UDC only supports single lane\n"); 1751 break; 1752 case USB_SSP_GEN_UNKNOWN: 1753 default: 1754 switch (hwparam_gen) { 1755 case DWC3_GHWPARAMS3_SSPHY_IFC_GEN2: 1756 if (DWC3_IP_IS(DWC32)) 1757 dwc->max_ssp_rate = USB_SSP_GEN_2x2; 1758 else 1759 dwc->max_ssp_rate = USB_SSP_GEN_2x1; 1760 break; 1761 case DWC3_GHWPARAMS3_SSPHY_IFC_GEN1: 1762 if (DWC3_IP_IS(DWC32)) 1763 dwc->max_ssp_rate = USB_SSP_GEN_1x2; 1764 break; 1765 } 1766 break; 1767 } 1768 } 1769 } 1770 1771 static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) 1772 { 1773 struct device *dev = dwc->dev; 1774 struct device_node *np_phy; 1775 struct extcon_dev *edev = NULL; 1776 const char *name; 1777 1778 if (device_property_read_bool(dev, "extcon")) 1779 return extcon_get_edev_by_phandle(dev, 0); 1780 1781 /* 1782 * Device tree platforms should get extcon via phandle. 1783 * On ACPI platforms, we get the name from a device property. 1784 * This device property is for kernel internal use only and 1785 * is expected to be set by the glue code. 1786 */ 1787 if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) 1788 return extcon_get_extcon_dev(name); 1789 1790 /* 1791 * Check explicitly if "usb-role-switch" is used since 1792 * extcon_find_edev_by_node() can not be used to check the absence of 1793 * an extcon device. In the absence of an device it will always return 1794 * EPROBE_DEFER. 1795 */ 1796 if (IS_ENABLED(CONFIG_USB_ROLE_SWITCH) && 1797 device_property_read_bool(dev, "usb-role-switch")) 1798 return NULL; 1799 1800 /* 1801 * Try to get an extcon device from the USB PHY controller's "port" 1802 * node. Check if it has the "port" node first, to avoid printing the 1803 * error message from underlying code, as it's a valid case: extcon 1804 * device (and "port" node) may be missing in case of "usb-role-switch" 1805 * or OTG mode. 1806 */ 1807 np_phy = of_parse_phandle(dev->of_node, "phys", 0); 1808 if (of_graph_is_present(np_phy)) { 1809 struct device_node *np_conn; 1810 1811 np_conn = of_graph_get_remote_node(np_phy, -1, -1); 1812 if (np_conn) 1813 edev = extcon_find_edev_by_node(np_conn); 1814 of_node_put(np_conn); 1815 } 1816 of_node_put(np_phy); 1817 1818 return edev; 1819 } 1820 1821 static int dwc3_get_clocks(struct dwc3 *dwc) 1822 { 1823 struct device *dev = dwc->dev; 1824 1825 if (!dev->of_node) 1826 return 0; 1827 1828 /* 1829 * Clocks are optional, but new DT platforms should support all clocks 1830 * as required by the DT-binding. 1831 * Some devices have different clock names in legacy device trees, 1832 * check for them to retain backwards compatibility. 1833 */ 1834 dwc->bus_clk = devm_clk_get_optional(dev, "bus_early"); 1835 if (IS_ERR(dwc->bus_clk)) { 1836 return dev_err_probe(dev, PTR_ERR(dwc->bus_clk), 1837 "could not get bus clock\n"); 1838 } 1839 1840 if (dwc->bus_clk == NULL) { 1841 dwc->bus_clk = devm_clk_get_optional(dev, "bus_clk"); 1842 if (IS_ERR(dwc->bus_clk)) { 1843 return dev_err_probe(dev, PTR_ERR(dwc->bus_clk), 1844 "could not get bus clock\n"); 1845 } 1846 } 1847 1848 dwc->ref_clk = devm_clk_get_optional(dev, "ref"); 1849 if (IS_ERR(dwc->ref_clk)) { 1850 return dev_err_probe(dev, PTR_ERR(dwc->ref_clk), 1851 "could not get ref clock\n"); 1852 } 1853 1854 if (dwc->ref_clk == NULL) { 1855 dwc->ref_clk = devm_clk_get_optional(dev, "ref_clk"); 1856 if (IS_ERR(dwc->ref_clk)) { 1857 return dev_err_probe(dev, PTR_ERR(dwc->ref_clk), 1858 "could not get ref clock\n"); 1859 } 1860 } 1861 1862 dwc->susp_clk = devm_clk_get_optional(dev, "suspend"); 1863 if (IS_ERR(dwc->susp_clk)) { 1864 return dev_err_probe(dev, PTR_ERR(dwc->susp_clk), 1865 "could not get suspend clock\n"); 1866 } 1867 1868 if (dwc->susp_clk == NULL) { 1869 dwc->susp_clk = devm_clk_get_optional(dev, "suspend_clk"); 1870 if (IS_ERR(dwc->susp_clk)) { 1871 return dev_err_probe(dev, PTR_ERR(dwc->susp_clk), 1872 "could not get suspend clock\n"); 1873 } 1874 } 1875 1876 return 0; 1877 } 1878 1879 static int dwc3_probe(struct platform_device *pdev) 1880 { 1881 struct device *dev = &pdev->dev; 1882 struct resource *res, dwc_res; 1883 void __iomem *regs; 1884 struct dwc3 *dwc; 1885 int ret; 1886 1887 dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); 1888 if (!dwc) 1889 return -ENOMEM; 1890 1891 dwc->dev = dev; 1892 1893 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1894 if (!res) { 1895 dev_err(dev, "missing memory resource\n"); 1896 return -ENODEV; 1897 } 1898 1899 dwc->xhci_resources[0].start = res->start; 1900 dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + 1901 DWC3_XHCI_REGS_END; 1902 dwc->xhci_resources[0].flags = res->flags; 1903 dwc->xhci_resources[0].name = res->name; 1904 1905 /* 1906 * Request memory region but exclude xHCI regs, 1907 * since it will be requested by the xhci-plat driver. 1908 */ 1909 dwc_res = *res; 1910 dwc_res.start += DWC3_GLOBALS_REGS_START; 1911 1912 if (dev->of_node) { 1913 struct device_node *parent = of_get_parent(dev->of_node); 1914 1915 if (of_device_is_compatible(parent, "realtek,rtd-dwc3")) { 1916 dwc_res.start -= DWC3_GLOBALS_REGS_START; 1917 dwc_res.start += DWC3_RTK_RTD_GLOBALS_REGS_START; 1918 } 1919 1920 of_node_put(parent); 1921 } 1922 1923 regs = devm_ioremap_resource(dev, &dwc_res); 1924 if (IS_ERR(regs)) 1925 return PTR_ERR(regs); 1926 1927 dwc->regs = regs; 1928 dwc->regs_size = resource_size(&dwc_res); 1929 1930 dwc3_get_properties(dwc); 1931 1932 dwc->reset = devm_reset_control_array_get_optional_shared(dev); 1933 if (IS_ERR(dwc->reset)) { 1934 ret = PTR_ERR(dwc->reset); 1935 goto err_put_psy; 1936 } 1937 1938 ret = dwc3_get_clocks(dwc); 1939 if (ret) 1940 goto err_put_psy; 1941 1942 ret = reset_control_deassert(dwc->reset); 1943 if (ret) 1944 goto err_put_psy; 1945 1946 ret = dwc3_clk_enable(dwc); 1947 if (ret) 1948 goto err_assert_reset; 1949 1950 if (!dwc3_core_is_valid(dwc)) { 1951 dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); 1952 ret = -ENODEV; 1953 goto err_disable_clks; 1954 } 1955 1956 platform_set_drvdata(pdev, dwc); 1957 dwc3_cache_hwparams(dwc); 1958 1959 if (!dwc->sysdev_is_parent && 1960 DWC3_GHWPARAMS0_AWIDTH(dwc->hwparams.hwparams0) == 64) { 1961 ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64)); 1962 if (ret) 1963 goto err_disable_clks; 1964 } 1965 1966 spin_lock_init(&dwc->lock); 1967 mutex_init(&dwc->mutex); 1968 1969 pm_runtime_get_noresume(dev); 1970 pm_runtime_set_active(dev); 1971 pm_runtime_use_autosuspend(dev); 1972 pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY); 1973 pm_runtime_enable(dev); 1974 1975 pm_runtime_forbid(dev); 1976 1977 ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); 1978 if (ret) { 1979 dev_err(dwc->dev, "failed to allocate event buffers\n"); 1980 ret = -ENOMEM; 1981 goto err_allow_rpm; 1982 } 1983 1984 dwc->edev = dwc3_get_extcon(dwc); 1985 if (IS_ERR(dwc->edev)) { 1986 ret = dev_err_probe(dwc->dev, PTR_ERR(dwc->edev), "failed to get extcon\n"); 1987 goto err_free_event_buffers; 1988 } 1989 1990 ret = dwc3_get_dr_mode(dwc); 1991 if (ret) 1992 goto err_free_event_buffers; 1993 1994 ret = dwc3_core_init(dwc); 1995 if (ret) { 1996 dev_err_probe(dev, ret, "failed to initialize core\n"); 1997 goto err_free_event_buffers; 1998 } 1999 2000 dwc3_check_params(dwc); 2001 dwc3_debugfs_init(dwc); 2002 2003 ret = dwc3_core_init_mode(dwc); 2004 if (ret) 2005 goto err_exit_debugfs; 2006 2007 pm_runtime_put(dev); 2008 2009 dma_set_max_seg_size(dev, UINT_MAX); 2010 2011 return 0; 2012 2013 err_exit_debugfs: 2014 dwc3_debugfs_exit(dwc); 2015 dwc3_event_buffers_cleanup(dwc); 2016 dwc3_phy_power_off(dwc); 2017 dwc3_phy_exit(dwc); 2018 dwc3_ulpi_exit(dwc); 2019 err_free_event_buffers: 2020 dwc3_free_event_buffers(dwc); 2021 err_allow_rpm: 2022 pm_runtime_allow(dev); 2023 pm_runtime_disable(dev); 2024 pm_runtime_dont_use_autosuspend(dev); 2025 pm_runtime_set_suspended(dev); 2026 pm_runtime_put_noidle(dev); 2027 err_disable_clks: 2028 dwc3_clk_disable(dwc); 2029 err_assert_reset: 2030 reset_control_assert(dwc->reset); 2031 err_put_psy: 2032 if (dwc->usb_psy) 2033 power_supply_put(dwc->usb_psy); 2034 2035 return ret; 2036 } 2037 2038 static void dwc3_remove(struct platform_device *pdev) 2039 { 2040 struct dwc3 *dwc = platform_get_drvdata(pdev); 2041 2042 pm_runtime_get_sync(&pdev->dev); 2043 2044 dwc3_core_exit_mode(dwc); 2045 dwc3_debugfs_exit(dwc); 2046 2047 dwc3_core_exit(dwc); 2048 dwc3_ulpi_exit(dwc); 2049 2050 pm_runtime_allow(&pdev->dev); 2051 pm_runtime_disable(&pdev->dev); 2052 pm_runtime_dont_use_autosuspend(&pdev->dev); 2053 pm_runtime_put_noidle(&pdev->dev); 2054 /* 2055 * HACK: Clear the driver data, which is currently accessed by parent 2056 * glue drivers, before allowing the parent to suspend. 2057 */ 2058 platform_set_drvdata(pdev, NULL); 2059 pm_runtime_set_suspended(&pdev->dev); 2060 2061 dwc3_free_event_buffers(dwc); 2062 2063 if (dwc->usb_psy) 2064 power_supply_put(dwc->usb_psy); 2065 } 2066 2067 #ifdef CONFIG_PM 2068 static int dwc3_core_init_for_resume(struct dwc3 *dwc) 2069 { 2070 int ret; 2071 2072 ret = reset_control_deassert(dwc->reset); 2073 if (ret) 2074 return ret; 2075 2076 ret = dwc3_clk_enable(dwc); 2077 if (ret) 2078 goto assert_reset; 2079 2080 ret = dwc3_core_init(dwc); 2081 if (ret) 2082 goto disable_clks; 2083 2084 return 0; 2085 2086 disable_clks: 2087 dwc3_clk_disable(dwc); 2088 assert_reset: 2089 reset_control_assert(dwc->reset); 2090 2091 return ret; 2092 } 2093 2094 static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) 2095 { 2096 unsigned long flags; 2097 u32 reg; 2098 2099 switch (dwc->current_dr_role) { 2100 case DWC3_GCTL_PRTCAP_DEVICE: 2101 if (pm_runtime_suspended(dwc->dev)) 2102 break; 2103 dwc3_gadget_suspend(dwc); 2104 synchronize_irq(dwc->irq_gadget); 2105 dwc3_core_exit(dwc); 2106 break; 2107 case DWC3_GCTL_PRTCAP_HOST: 2108 if (!PMSG_IS_AUTO(msg) && !device_may_wakeup(dwc->dev)) { 2109 dwc3_core_exit(dwc); 2110 break; 2111 } 2112 2113 /* Let controller to suspend HSPHY before PHY driver suspends */ 2114 if (dwc->dis_u2_susphy_quirk || 2115 dwc->dis_enblslpm_quirk) { 2116 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 2117 reg |= DWC3_GUSB2PHYCFG_ENBLSLPM | 2118 DWC3_GUSB2PHYCFG_SUSPHY; 2119 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 2120 2121 /* Give some time for USB2 PHY to suspend */ 2122 usleep_range(5000, 6000); 2123 } 2124 2125 phy_pm_runtime_put_sync(dwc->usb2_generic_phy); 2126 phy_pm_runtime_put_sync(dwc->usb3_generic_phy); 2127 break; 2128 case DWC3_GCTL_PRTCAP_OTG: 2129 /* do nothing during runtime_suspend */ 2130 if (PMSG_IS_AUTO(msg)) 2131 break; 2132 2133 if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) { 2134 spin_lock_irqsave(&dwc->lock, flags); 2135 dwc3_gadget_suspend(dwc); 2136 spin_unlock_irqrestore(&dwc->lock, flags); 2137 synchronize_irq(dwc->irq_gadget); 2138 } 2139 2140 dwc3_otg_exit(dwc); 2141 dwc3_core_exit(dwc); 2142 break; 2143 default: 2144 /* do nothing */ 2145 break; 2146 } 2147 2148 return 0; 2149 } 2150 2151 static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) 2152 { 2153 unsigned long flags; 2154 int ret; 2155 u32 reg; 2156 2157 switch (dwc->current_dr_role) { 2158 case DWC3_GCTL_PRTCAP_DEVICE: 2159 ret = dwc3_core_init_for_resume(dwc); 2160 if (ret) 2161 return ret; 2162 2163 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); 2164 dwc3_gadget_resume(dwc); 2165 break; 2166 case DWC3_GCTL_PRTCAP_HOST: 2167 if (!PMSG_IS_AUTO(msg) && !device_may_wakeup(dwc->dev)) { 2168 ret = dwc3_core_init_for_resume(dwc); 2169 if (ret) 2170 return ret; 2171 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); 2172 break; 2173 } 2174 /* Restore GUSB2PHYCFG bits that were modified in suspend */ 2175 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 2176 if (dwc->dis_u2_susphy_quirk) 2177 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 2178 2179 if (dwc->dis_enblslpm_quirk) 2180 reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM; 2181 2182 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 2183 2184 phy_pm_runtime_get_sync(dwc->usb2_generic_phy); 2185 phy_pm_runtime_get_sync(dwc->usb3_generic_phy); 2186 break; 2187 case DWC3_GCTL_PRTCAP_OTG: 2188 /* nothing to do on runtime_resume */ 2189 if (PMSG_IS_AUTO(msg)) 2190 break; 2191 2192 ret = dwc3_core_init_for_resume(dwc); 2193 if (ret) 2194 return ret; 2195 2196 dwc3_set_prtcap(dwc, dwc->current_dr_role); 2197 2198 dwc3_otg_init(dwc); 2199 if (dwc->current_otg_role == DWC3_OTG_ROLE_HOST) { 2200 dwc3_otg_host_init(dwc); 2201 } else if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) { 2202 spin_lock_irqsave(&dwc->lock, flags); 2203 dwc3_gadget_resume(dwc); 2204 spin_unlock_irqrestore(&dwc->lock, flags); 2205 } 2206 2207 break; 2208 default: 2209 /* do nothing */ 2210 break; 2211 } 2212 2213 return 0; 2214 } 2215 2216 static int dwc3_runtime_checks(struct dwc3 *dwc) 2217 { 2218 switch (dwc->current_dr_role) { 2219 case DWC3_GCTL_PRTCAP_DEVICE: 2220 if (dwc->connected) 2221 return -EBUSY; 2222 break; 2223 case DWC3_GCTL_PRTCAP_HOST: 2224 default: 2225 /* do nothing */ 2226 break; 2227 } 2228 2229 return 0; 2230 } 2231 2232 static int dwc3_runtime_suspend(struct device *dev) 2233 { 2234 struct dwc3 *dwc = dev_get_drvdata(dev); 2235 int ret; 2236 2237 if (dwc3_runtime_checks(dwc)) 2238 return -EBUSY; 2239 2240 ret = dwc3_suspend_common(dwc, PMSG_AUTO_SUSPEND); 2241 if (ret) 2242 return ret; 2243 2244 return 0; 2245 } 2246 2247 static int dwc3_runtime_resume(struct device *dev) 2248 { 2249 struct dwc3 *dwc = dev_get_drvdata(dev); 2250 int ret; 2251 2252 ret = dwc3_resume_common(dwc, PMSG_AUTO_RESUME); 2253 if (ret) 2254 return ret; 2255 2256 switch (dwc->current_dr_role) { 2257 case DWC3_GCTL_PRTCAP_DEVICE: 2258 dwc3_gadget_process_pending_events(dwc); 2259 break; 2260 case DWC3_GCTL_PRTCAP_HOST: 2261 default: 2262 /* do nothing */ 2263 break; 2264 } 2265 2266 pm_runtime_mark_last_busy(dev); 2267 2268 return 0; 2269 } 2270 2271 static int dwc3_runtime_idle(struct device *dev) 2272 { 2273 struct dwc3 *dwc = dev_get_drvdata(dev); 2274 2275 switch (dwc->current_dr_role) { 2276 case DWC3_GCTL_PRTCAP_DEVICE: 2277 if (dwc3_runtime_checks(dwc)) 2278 return -EBUSY; 2279 break; 2280 case DWC3_GCTL_PRTCAP_HOST: 2281 default: 2282 /* do nothing */ 2283 break; 2284 } 2285 2286 pm_runtime_mark_last_busy(dev); 2287 pm_runtime_autosuspend(dev); 2288 2289 return 0; 2290 } 2291 #endif /* CONFIG_PM */ 2292 2293 #ifdef CONFIG_PM_SLEEP 2294 static int dwc3_suspend(struct device *dev) 2295 { 2296 struct dwc3 *dwc = dev_get_drvdata(dev); 2297 int ret; 2298 2299 ret = dwc3_suspend_common(dwc, PMSG_SUSPEND); 2300 if (ret) 2301 return ret; 2302 2303 pinctrl_pm_select_sleep_state(dev); 2304 2305 return 0; 2306 } 2307 2308 static int dwc3_resume(struct device *dev) 2309 { 2310 struct dwc3 *dwc = dev_get_drvdata(dev); 2311 int ret; 2312 2313 pinctrl_pm_select_default_state(dev); 2314 2315 ret = dwc3_resume_common(dwc, PMSG_RESUME); 2316 if (ret) 2317 return ret; 2318 2319 pm_runtime_disable(dev); 2320 pm_runtime_set_active(dev); 2321 pm_runtime_enable(dev); 2322 2323 return 0; 2324 } 2325 2326 static void dwc3_complete(struct device *dev) 2327 { 2328 struct dwc3 *dwc = dev_get_drvdata(dev); 2329 u32 reg; 2330 2331 if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && 2332 dwc->dis_split_quirk) { 2333 reg = dwc3_readl(dwc->regs, DWC3_GUCTL3); 2334 reg |= DWC3_GUCTL3_SPLITDISABLE; 2335 dwc3_writel(dwc->regs, DWC3_GUCTL3, reg); 2336 } 2337 } 2338 #else 2339 #define dwc3_complete NULL 2340 #endif /* CONFIG_PM_SLEEP */ 2341 2342 static const struct dev_pm_ops dwc3_dev_pm_ops = { 2343 SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) 2344 .complete = dwc3_complete, 2345 SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume, 2346 dwc3_runtime_idle) 2347 }; 2348 2349 #ifdef CONFIG_OF 2350 static const struct of_device_id of_dwc3_match[] = { 2351 { 2352 .compatible = "snps,dwc3" 2353 }, 2354 { 2355 .compatible = "synopsys,dwc3" 2356 }, 2357 { }, 2358 }; 2359 MODULE_DEVICE_TABLE(of, of_dwc3_match); 2360 #endif 2361 2362 #ifdef CONFIG_ACPI 2363 2364 #define ACPI_ID_INTEL_BSW "808622B7" 2365 2366 static const struct acpi_device_id dwc3_acpi_match[] = { 2367 { ACPI_ID_INTEL_BSW, 0 }, 2368 { }, 2369 }; 2370 MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match); 2371 #endif 2372 2373 static struct platform_driver dwc3_driver = { 2374 .probe = dwc3_probe, 2375 .remove_new = dwc3_remove, 2376 .driver = { 2377 .name = "dwc3", 2378 .of_match_table = of_match_ptr(of_dwc3_match), 2379 .acpi_match_table = ACPI_PTR(dwc3_acpi_match), 2380 .pm = &dwc3_dev_pm_ops, 2381 }, 2382 }; 2383 2384 module_platform_driver(dwc3_driver); 2385 2386 MODULE_ALIAS("platform:dwc3"); 2387 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 2388 MODULE_LICENSE("GPL v2"); 2389 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); 2390