1 /* 2 * drivers/usb/gadget/dwc2_udc_otg.c 3 * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers 4 * 5 * Copyright (C) 2008 for Samsung Electronics 6 * 7 * BSP Support for Samsung's UDC driver 8 * available at: 9 * git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git 10 * 11 * State machine bugfixes: 12 * Marek Szyprowski <m.szyprowski@samsung.com> 13 * 14 * Ported to u-boot: 15 * Marek Szyprowski <m.szyprowski@samsung.com> 16 * Lukasz Majewski <l.majewski@samsumg.com> 17 * 18 * SPDX-License-Identifier: GPL-2.0+ 19 */ 20 #undef DEBUG 21 #include <common.h> 22 #include <asm/errno.h> 23 #include <linux/list.h> 24 #include <malloc.h> 25 26 #include <linux/usb/ch9.h> 27 #include <linux/usb/gadget.h> 28 29 #include <asm/byteorder.h> 30 #include <asm/unaligned.h> 31 #include <asm/io.h> 32 33 #include <asm/mach-types.h> 34 35 #include "dwc2_udc_otg_regs.h" 36 #include "dwc2_udc_otg_priv.h" 37 #include <usb/lin_gadget_compat.h> 38 39 /***********************************************************/ 40 41 #define OTG_DMA_MODE 1 42 43 #define DEBUG_SETUP 0 44 #define DEBUG_EP0 0 45 #define DEBUG_ISR 0 46 #define DEBUG_OUT_EP 0 47 #define DEBUG_IN_EP 0 48 49 #include <usb/dwc2_udc.h> 50 51 #define EP0_CON 0 52 #define EP_MASK 0xF 53 54 static char *state_names[] = { 55 "WAIT_FOR_SETUP", 56 "DATA_STATE_XMIT", 57 "DATA_STATE_NEED_ZLP", 58 "WAIT_FOR_OUT_STATUS", 59 "DATA_STATE_RECV", 60 "WAIT_FOR_COMPLETE", 61 "WAIT_FOR_OUT_COMPLETE", 62 "WAIT_FOR_IN_COMPLETE", 63 "WAIT_FOR_NULL_COMPLETE", 64 }; 65 66 #define DRIVER_DESC "DWC2 HS USB OTG Device Driver, (c) Samsung Electronics" 67 #define DRIVER_VERSION "15 March 2009" 68 69 struct dwc2_udc *the_controller; 70 71 static const char driver_name[] = "dwc2-udc"; 72 static const char driver_desc[] = DRIVER_DESC; 73 static const char ep0name[] = "ep0-control"; 74 75 /* Max packet size*/ 76 static unsigned int ep0_fifo_size = 64; 77 static unsigned int ep_fifo_size = 512; 78 static unsigned int ep_fifo_size2 = 1024; 79 static int reset_available = 1; 80 81 static struct usb_ctrlrequest *usb_ctrl; 82 static dma_addr_t usb_ctrl_dma_addr; 83 84 /* 85 Local declarations. 86 */ 87 static int dwc2_ep_enable(struct usb_ep *ep, 88 const struct usb_endpoint_descriptor *); 89 static int dwc2_ep_disable(struct usb_ep *ep); 90 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep, 91 gfp_t gfp_flags); 92 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *); 93 94 static int dwc2_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags); 95 static int dwc2_dequeue(struct usb_ep *ep, struct usb_request *); 96 static int dwc2_fifo_status(struct usb_ep *ep); 97 static void dwc2_fifo_flush(struct usb_ep *ep); 98 static void dwc2_ep0_read(struct dwc2_udc *dev); 99 static void dwc2_ep0_kick(struct dwc2_udc *dev, struct dwc2_ep *ep); 100 static void dwc2_handle_ep0(struct dwc2_udc *dev); 101 static int dwc2_ep0_write(struct dwc2_udc *dev); 102 static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req); 103 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status); 104 static void stop_activity(struct dwc2_udc *dev, 105 struct usb_gadget_driver *driver); 106 static int udc_enable(struct dwc2_udc *dev); 107 static void udc_set_address(struct dwc2_udc *dev, unsigned char address); 108 static void reconfig_usbd(struct dwc2_udc *dev); 109 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed); 110 static void nuke(struct dwc2_ep *ep, int status); 111 static int dwc2_udc_set_halt(struct usb_ep *_ep, int value); 112 static void dwc2_udc_set_nak(struct dwc2_ep *ep); 113 114 void set_udc_gadget_private_data(void *p) 115 { 116 debug_cond(DEBUG_SETUP != 0, 117 "%s: the_controller: 0x%p, p: 0x%p\n", __func__, 118 the_controller, p); 119 the_controller->gadget.dev.device_data = p; 120 } 121 122 void *get_udc_gadget_private_data(struct usb_gadget *gadget) 123 { 124 return gadget->dev.device_data; 125 } 126 127 static struct usb_ep_ops dwc2_ep_ops = { 128 .enable = dwc2_ep_enable, 129 .disable = dwc2_ep_disable, 130 131 .alloc_request = dwc2_alloc_request, 132 .free_request = dwc2_free_request, 133 134 .queue = dwc2_queue, 135 .dequeue = dwc2_dequeue, 136 137 .set_halt = dwc2_udc_set_halt, 138 .fifo_status = dwc2_fifo_status, 139 .fifo_flush = dwc2_fifo_flush, 140 }; 141 142 #define create_proc_files() do {} while (0) 143 #define remove_proc_files() do {} while (0) 144 145 /***********************************************************/ 146 147 void __iomem *regs_otg; 148 struct dwc2_usbotg_reg *reg; 149 150 bool dfu_usb_get_reset(void) 151 { 152 return !!(readl(®->gintsts) & INT_RESET); 153 } 154 155 __weak void otg_phy_init(struct dwc2_udc *dev) {} 156 __weak void otg_phy_off(struct dwc2_udc *dev) {} 157 158 /***********************************************************/ 159 160 #include "dwc2_udc_otg_xfer_dma.c" 161 162 /* 163 * udc_disable - disable USB device controller 164 */ 165 static void udc_disable(struct dwc2_udc *dev) 166 { 167 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev); 168 169 udc_set_address(dev, 0); 170 171 dev->ep0state = WAIT_FOR_SETUP; 172 dev->gadget.speed = USB_SPEED_UNKNOWN; 173 dev->usb_address = 0; 174 175 otg_phy_off(dev); 176 } 177 178 /* 179 * udc_reinit - initialize software state 180 */ 181 static void udc_reinit(struct dwc2_udc *dev) 182 { 183 unsigned int i; 184 185 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev); 186 187 /* device/ep0 records init */ 188 INIT_LIST_HEAD(&dev->gadget.ep_list); 189 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 190 dev->ep0state = WAIT_FOR_SETUP; 191 192 /* basic endpoint records init */ 193 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) { 194 struct dwc2_ep *ep = &dev->ep[i]; 195 196 if (i != 0) 197 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); 198 199 ep->desc = 0; 200 ep->stopped = 0; 201 INIT_LIST_HEAD(&ep->queue); 202 ep->pio_irqs = 0; 203 } 204 205 /* the rest was statically initialized, and is read-only */ 206 } 207 208 #define BYTES2MAXP(x) (x / 8) 209 #define MAXP2BYTES(x) (x * 8) 210 211 /* until it's enabled, this UDC should be completely invisible 212 * to any USB host. 213 */ 214 static int udc_enable(struct dwc2_udc *dev) 215 { 216 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev); 217 218 otg_phy_init(dev); 219 reconfig_usbd(dev); 220 221 debug_cond(DEBUG_SETUP != 0, 222 "DWC2 USB 2.0 OTG Controller Core Initialized : 0x%x\n", 223 readl(®->gintmsk)); 224 225 dev->gadget.speed = USB_SPEED_UNKNOWN; 226 227 return 0; 228 } 229 230 /* 231 Register entry point for the peripheral controller driver. 232 */ 233 int usb_gadget_register_driver(struct usb_gadget_driver *driver) 234 { 235 struct dwc2_udc *dev = the_controller; 236 int retval = 0; 237 unsigned long flags = 0; 238 239 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name"); 240 241 if (!driver 242 || (driver->speed != USB_SPEED_FULL 243 && driver->speed != USB_SPEED_HIGH) 244 || !driver->bind || !driver->disconnect || !driver->setup) 245 return -EINVAL; 246 if (!dev) 247 return -ENODEV; 248 if (dev->driver) 249 return -EBUSY; 250 251 spin_lock_irqsave(&dev->lock, flags); 252 /* first hook up the driver ... */ 253 dev->driver = driver; 254 spin_unlock_irqrestore(&dev->lock, flags); 255 256 if (retval) { /* TODO */ 257 printf("target device_add failed, error %d\n", retval); 258 return retval; 259 } 260 261 retval = driver->bind(&dev->gadget); 262 if (retval) { 263 debug_cond(DEBUG_SETUP != 0, 264 "%s: bind to driver --> error %d\n", 265 dev->gadget.name, retval); 266 dev->driver = 0; 267 return retval; 268 } 269 270 enable_irq(IRQ_OTG); 271 272 debug_cond(DEBUG_SETUP != 0, 273 "Registered gadget driver %s\n", dev->gadget.name); 274 udc_enable(dev); 275 276 return 0; 277 } 278 279 /* 280 * Unregister entry point for the peripheral controller driver. 281 */ 282 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) 283 { 284 struct dwc2_udc *dev = the_controller; 285 unsigned long flags = 0; 286 287 if (!dev) 288 return -ENODEV; 289 if (!driver || driver != dev->driver) 290 return -EINVAL; 291 292 spin_lock_irqsave(&dev->lock, flags); 293 dev->driver = 0; 294 stop_activity(dev, driver); 295 spin_unlock_irqrestore(&dev->lock, flags); 296 297 driver->unbind(&dev->gadget); 298 299 disable_irq(IRQ_OTG); 300 301 udc_disable(dev); 302 return 0; 303 } 304 305 /* 306 * done - retire a request; caller blocked irqs 307 */ 308 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status) 309 { 310 unsigned int stopped = ep->stopped; 311 312 debug("%s: %s %p, req = %p, stopped = %d\n", 313 __func__, ep->ep.name, ep, &req->req, stopped); 314 315 list_del_init(&req->queue); 316 317 if (likely(req->req.status == -EINPROGRESS)) 318 req->req.status = status; 319 else 320 status = req->req.status; 321 322 if (status && status != -ESHUTDOWN) { 323 debug("complete %s req %p stat %d len %u/%u\n", 324 ep->ep.name, &req->req, status, 325 req->req.actual, req->req.length); 326 } 327 328 /* don't modify queue heads during completion callback */ 329 ep->stopped = 1; 330 331 #ifdef DEBUG 332 printf("calling complete callback\n"); 333 { 334 int i, len = req->req.length; 335 336 printf("pkt[%d] = ", req->req.length); 337 if (len > 64) 338 len = 64; 339 for (i = 0; i < len; i++) { 340 printf("%02x", ((u8 *)req->req.buf)[i]); 341 if ((i & 7) == 7) 342 printf(" "); 343 } 344 printf("\n"); 345 } 346 #endif 347 spin_unlock(&ep->dev->lock); 348 req->req.complete(&ep->ep, &req->req); 349 spin_lock(&ep->dev->lock); 350 351 debug("callback completed\n"); 352 353 ep->stopped = stopped; 354 } 355 356 /* 357 * nuke - dequeue ALL requests 358 */ 359 static void nuke(struct dwc2_ep *ep, int status) 360 { 361 struct dwc2_request *req; 362 363 debug("%s: %s %p\n", __func__, ep->ep.name, ep); 364 365 /* called with irqs blocked */ 366 while (!list_empty(&ep->queue)) { 367 req = list_entry(ep->queue.next, struct dwc2_request, queue); 368 done(ep, req, status); 369 } 370 } 371 372 static void stop_activity(struct dwc2_udc *dev, 373 struct usb_gadget_driver *driver) 374 { 375 int i; 376 377 /* don't disconnect drivers more than once */ 378 if (dev->gadget.speed == USB_SPEED_UNKNOWN) 379 driver = 0; 380 dev->gadget.speed = USB_SPEED_UNKNOWN; 381 382 /* prevent new request submissions, kill any outstanding requests */ 383 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) { 384 struct dwc2_ep *ep = &dev->ep[i]; 385 ep->stopped = 1; 386 nuke(ep, -ESHUTDOWN); 387 } 388 389 /* report disconnect; the driver is already quiesced */ 390 if (driver) { 391 spin_unlock(&dev->lock); 392 driver->disconnect(&dev->gadget); 393 spin_lock(&dev->lock); 394 } 395 396 /* re-init driver-visible data structures */ 397 udc_reinit(dev); 398 } 399 400 static void reconfig_usbd(struct dwc2_udc *dev) 401 { 402 /* 2. Soft-reset OTG Core and then unreset again. */ 403 int i; 404 unsigned int uTemp = writel(CORE_SOFT_RESET, ®->grstctl); 405 uint32_t dflt_gusbcfg; 406 407 debug("Reseting OTG controller\n"); 408 409 dflt_gusbcfg = 410 0<<15 /* PHY Low Power Clock sel*/ 411 |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/ 412 |0x5<<10 /* Turnaround time*/ 413 |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/ 414 /* 1:SRP enable] H1= 1,1*/ 415 |0<<7 /* Ulpi DDR sel*/ 416 |0<<6 /* 0: high speed utmi+, 1: full speed serial*/ 417 |0<<4 /* 0: utmi+, 1:ulpi*/ 418 |1<<3 /* phy i/f 0:8bit, 1:16bit*/ 419 |0x7<<0; /* HS/FS Timeout**/ 420 421 if (dev->pdata->usb_gusbcfg) 422 dflt_gusbcfg = dev->pdata->usb_gusbcfg; 423 424 writel(dflt_gusbcfg, ®->gusbcfg); 425 426 /* 3. Put the OTG device core in the disconnected state.*/ 427 uTemp = readl(®->dctl); 428 uTemp |= SOFT_DISCONNECT; 429 writel(uTemp, ®->dctl); 430 431 udelay(20); 432 433 /* 4. Make the OTG device core exit from the disconnected state.*/ 434 uTemp = readl(®->dctl); 435 uTemp = uTemp & ~SOFT_DISCONNECT; 436 writel(uTemp, ®->dctl); 437 438 /* 5. Configure OTG Core to initial settings of device mode.*/ 439 /* [][1: full speed(30Mhz) 0:high speed]*/ 440 writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg); 441 442 mdelay(1); 443 444 /* 6. Unmask the core interrupts*/ 445 writel(GINTMSK_INIT, ®->gintmsk); 446 447 /* 7. Set NAK bit of EP0, EP1, EP2*/ 448 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl); 449 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl); 450 451 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) { 452 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl); 453 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl); 454 } 455 456 /* 8. Unmask EPO interrupts*/ 457 writel(((1 << EP0_CON) << DAINT_OUT_BIT) 458 | (1 << EP0_CON), ®->daintmsk); 459 460 /* 9. Unmask device OUT EP common interrupts*/ 461 writel(DOEPMSK_INIT, ®->doepmsk); 462 463 /* 10. Unmask device IN EP common interrupts*/ 464 writel(DIEPMSK_INIT, ®->diepmsk); 465 466 /* 11. Set Rx FIFO Size (in 32-bit words) */ 467 writel(RX_FIFO_SIZE >> 2, ®->grxfsiz); 468 469 /* 12. Set Non Periodic Tx FIFO Size */ 470 writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0, 471 ®->gnptxfsiz); 472 473 for (i = 1; i < DWC2_MAX_HW_ENDPOINTS; i++) 474 writel((PTX_FIFO_SIZE >> 2) << 16 | 475 ((RX_FIFO_SIZE + NPTX_FIFO_SIZE + 476 PTX_FIFO_SIZE*(i-1)) >> 2) << 0, 477 ®->dieptxf[i-1]); 478 479 /* Flush the RX FIFO */ 480 writel(RX_FIFO_FLUSH, ®->grstctl); 481 while (readl(®->grstctl) & RX_FIFO_FLUSH) 482 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__); 483 484 /* Flush all the Tx FIFO's */ 485 writel(TX_FIFO_FLUSH_ALL, ®->grstctl); 486 writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl); 487 while (readl(®->grstctl) & TX_FIFO_FLUSH) 488 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__); 489 490 /* 13. Clear NAK bit of EP0, EP1, EP2*/ 491 /* For Slave mode*/ 492 /* EP0: Control OUT */ 493 writel(DEPCTL_EPDIS | DEPCTL_CNAK, 494 ®->out_endp[EP0_CON].doepctl); 495 496 /* 14. Initialize OTG Link Core.*/ 497 writel(GAHBCFG_INIT, ®->gahbcfg); 498 } 499 500 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed) 501 { 502 unsigned int ep_ctrl; 503 int i; 504 505 if (speed == USB_SPEED_HIGH) { 506 ep0_fifo_size = 64; 507 ep_fifo_size = 512; 508 ep_fifo_size2 = 1024; 509 dev->gadget.speed = USB_SPEED_HIGH; 510 } else { 511 ep0_fifo_size = 64; 512 ep_fifo_size = 64; 513 ep_fifo_size2 = 64; 514 dev->gadget.speed = USB_SPEED_FULL; 515 } 516 517 dev->ep[0].ep.maxpacket = ep0_fifo_size; 518 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) 519 dev->ep[i].ep.maxpacket = ep_fifo_size; 520 521 /* EP0 - Control IN (64 bytes)*/ 522 ep_ctrl = readl(®->in_endp[EP0_CON].diepctl); 523 writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl); 524 525 /* EP0 - Control OUT (64 bytes)*/ 526 ep_ctrl = readl(®->out_endp[EP0_CON].doepctl); 527 writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl); 528 } 529 530 static int dwc2_ep_enable(struct usb_ep *_ep, 531 const struct usb_endpoint_descriptor *desc) 532 { 533 struct dwc2_ep *ep; 534 struct dwc2_udc *dev; 535 unsigned long flags = 0; 536 537 debug("%s: %p\n", __func__, _ep); 538 539 ep = container_of(_ep, struct dwc2_ep, ep); 540 if (!_ep || !desc || ep->desc || _ep->name == ep0name 541 || desc->bDescriptorType != USB_DT_ENDPOINT 542 || ep->bEndpointAddress != desc->bEndpointAddress 543 || ep_maxpacket(ep) < 544 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) { 545 546 debug("%s: bad ep or descriptor\n", __func__); 547 return -EINVAL; 548 } 549 550 /* xfer types must match, except that interrupt ~= bulk */ 551 if (ep->bmAttributes != desc->bmAttributes 552 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK 553 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { 554 555 debug("%s: %s type mismatch\n", __func__, _ep->name); 556 return -EINVAL; 557 } 558 559 /* hardware _could_ do smaller, but driver doesn't */ 560 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK && 561 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) > 562 ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) { 563 564 debug("%s: bad %s maxpacket\n", __func__, _ep->name); 565 return -ERANGE; 566 } 567 568 dev = ep->dev; 569 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { 570 571 debug("%s: bogus device state\n", __func__); 572 return -ESHUTDOWN; 573 } 574 575 ep->stopped = 0; 576 ep->desc = desc; 577 ep->pio_irqs = 0; 578 ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)); 579 580 /* Reset halt state */ 581 dwc2_udc_set_nak(ep); 582 dwc2_udc_set_halt(_ep, 0); 583 584 spin_lock_irqsave(&ep->dev->lock, flags); 585 dwc2_udc_ep_activate(ep); 586 spin_unlock_irqrestore(&ep->dev->lock, flags); 587 588 debug("%s: enabled %s, stopped = %d, maxpacket = %d\n", 589 __func__, _ep->name, ep->stopped, ep->ep.maxpacket); 590 return 0; 591 } 592 593 /* 594 * Disable EP 595 */ 596 static int dwc2_ep_disable(struct usb_ep *_ep) 597 { 598 struct dwc2_ep *ep; 599 unsigned long flags = 0; 600 601 debug("%s: %p\n", __func__, _ep); 602 603 ep = container_of(_ep, struct dwc2_ep, ep); 604 if (!_ep || !ep->desc) { 605 debug("%s: %s not enabled\n", __func__, 606 _ep ? ep->ep.name : NULL); 607 return -EINVAL; 608 } 609 610 spin_lock_irqsave(&ep->dev->lock, flags); 611 612 /* Nuke all pending requests */ 613 nuke(ep, -ESHUTDOWN); 614 615 ep->desc = 0; 616 ep->stopped = 1; 617 618 spin_unlock_irqrestore(&ep->dev->lock, flags); 619 620 debug("%s: disabled %s\n", __func__, _ep->name); 621 return 0; 622 } 623 624 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep, 625 gfp_t gfp_flags) 626 { 627 struct dwc2_request *req; 628 629 debug("%s: %s %p\n", __func__, ep->name, ep); 630 631 req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req)); 632 if (!req) 633 return 0; 634 635 memset(req, 0, sizeof *req); 636 INIT_LIST_HEAD(&req->queue); 637 638 return &req->req; 639 } 640 641 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req) 642 { 643 struct dwc2_request *req; 644 645 debug("%s: %p\n", __func__, ep); 646 647 req = container_of(_req, struct dwc2_request, req); 648 WARN_ON(!list_empty(&req->queue)); 649 kfree(req); 650 } 651 652 /* dequeue JUST ONE request */ 653 static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req) 654 { 655 struct dwc2_ep *ep; 656 struct dwc2_request *req; 657 unsigned long flags = 0; 658 659 debug("%s: %p\n", __func__, _ep); 660 661 ep = container_of(_ep, struct dwc2_ep, ep); 662 if (!_ep || ep->ep.name == ep0name) 663 return -EINVAL; 664 665 spin_lock_irqsave(&ep->dev->lock, flags); 666 667 /* make sure it's actually queued on this endpoint */ 668 list_for_each_entry(req, &ep->queue, queue) { 669 if (&req->req == _req) 670 break; 671 } 672 if (&req->req != _req) { 673 spin_unlock_irqrestore(&ep->dev->lock, flags); 674 return -EINVAL; 675 } 676 677 done(ep, req, -ECONNRESET); 678 679 spin_unlock_irqrestore(&ep->dev->lock, flags); 680 return 0; 681 } 682 683 /* 684 * Return bytes in EP FIFO 685 */ 686 static int dwc2_fifo_status(struct usb_ep *_ep) 687 { 688 int count = 0; 689 struct dwc2_ep *ep; 690 691 ep = container_of(_ep, struct dwc2_ep, ep); 692 if (!_ep) { 693 debug("%s: bad ep\n", __func__); 694 return -ENODEV; 695 } 696 697 debug("%s: %d\n", __func__, ep_index(ep)); 698 699 /* LPD can't report unclaimed bytes from IN fifos */ 700 if (ep_is_in(ep)) 701 return -EOPNOTSUPP; 702 703 return count; 704 } 705 706 /* 707 * Flush EP FIFO 708 */ 709 static void dwc2_fifo_flush(struct usb_ep *_ep) 710 { 711 struct dwc2_ep *ep; 712 713 ep = container_of(_ep, struct dwc2_ep, ep); 714 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { 715 debug("%s: bad ep\n", __func__); 716 return; 717 } 718 719 debug("%s: %d\n", __func__, ep_index(ep)); 720 } 721 722 static const struct usb_gadget_ops dwc2_udc_ops = { 723 /* current versions must always be self-powered */ 724 }; 725 726 static struct dwc2_udc memory = { 727 .usb_address = 0, 728 .gadget = { 729 .ops = &dwc2_udc_ops, 730 .ep0 = &memory.ep[0].ep, 731 .name = driver_name, 732 }, 733 734 /* control endpoint */ 735 .ep[0] = { 736 .ep = { 737 .name = ep0name, 738 .ops = &dwc2_ep_ops, 739 .maxpacket = EP0_FIFO_SIZE, 740 }, 741 .dev = &memory, 742 743 .bEndpointAddress = 0, 744 .bmAttributes = 0, 745 746 .ep_type = ep_control, 747 }, 748 749 /* first group of endpoints */ 750 .ep[1] = { 751 .ep = { 752 .name = "ep1in-bulk", 753 .ops = &dwc2_ep_ops, 754 .maxpacket = EP_FIFO_SIZE, 755 }, 756 .dev = &memory, 757 758 .bEndpointAddress = USB_DIR_IN | 1, 759 .bmAttributes = USB_ENDPOINT_XFER_BULK, 760 761 .ep_type = ep_bulk_out, 762 .fifo_num = 1, 763 }, 764 765 .ep[2] = { 766 .ep = { 767 .name = "ep2out-bulk", 768 .ops = &dwc2_ep_ops, 769 .maxpacket = EP_FIFO_SIZE, 770 }, 771 .dev = &memory, 772 773 .bEndpointAddress = USB_DIR_OUT | 2, 774 .bmAttributes = USB_ENDPOINT_XFER_BULK, 775 776 .ep_type = ep_bulk_in, 777 .fifo_num = 2, 778 }, 779 780 .ep[3] = { 781 .ep = { 782 .name = "ep3in-int", 783 .ops = &dwc2_ep_ops, 784 .maxpacket = EP_FIFO_SIZE, 785 }, 786 .dev = &memory, 787 788 .bEndpointAddress = USB_DIR_IN | 3, 789 .bmAttributes = USB_ENDPOINT_XFER_INT, 790 791 .ep_type = ep_interrupt, 792 .fifo_num = 3, 793 }, 794 }; 795 796 /* 797 * probe - binds to the platform device 798 */ 799 800 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata) 801 { 802 struct dwc2_udc *dev = &memory; 803 int retval = 0; 804 805 debug("%s: %p\n", __func__, pdata); 806 807 dev->pdata = pdata; 808 809 reg = (struct dwc2_usbotg_reg *)pdata->regs_otg; 810 811 /* regs_otg = (void *)pdata->regs_otg; */ 812 813 dev->gadget.is_dualspeed = 1; /* Hack only*/ 814 dev->gadget.is_otg = 0; 815 dev->gadget.is_a_peripheral = 0; 816 dev->gadget.b_hnp_enable = 0; 817 dev->gadget.a_hnp_support = 0; 818 dev->gadget.a_alt_hnp_support = 0; 819 820 the_controller = dev; 821 822 usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE, 823 ROUND(sizeof(struct usb_ctrlrequest), 824 CONFIG_SYS_CACHELINE_SIZE)); 825 if (!usb_ctrl) { 826 error("No memory available for UDC!\n"); 827 return -ENOMEM; 828 } 829 830 usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl; 831 832 udc_reinit(dev); 833 834 return retval; 835 } 836 837 int usb_gadget_handle_interrupts(int index) 838 { 839 u32 intr_status = readl(®->gintsts); 840 u32 gintmsk = readl(®->gintmsk); 841 842 if (intr_status & gintmsk) 843 return dwc2_udc_irq(1, (void *)the_controller); 844 return 0; 845 } 846