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 <linux/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 uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz; 407 408 debug("Reseting OTG controller\n"); 409 410 dflt_gusbcfg = 411 0<<15 /* PHY Low Power Clock sel*/ 412 |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/ 413 |0x5<<10 /* Turnaround time*/ 414 |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/ 415 /* 1:SRP enable] H1= 1,1*/ 416 |0<<7 /* Ulpi DDR sel*/ 417 |0<<6 /* 0: high speed utmi+, 1: full speed serial*/ 418 |0<<4 /* 0: utmi+, 1:ulpi*/ 419 #ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8 420 |0<<3 /* phy i/f 0:8bit, 1:16bit*/ 421 #else 422 |1<<3 /* phy i/f 0:8bit, 1:16bit*/ 423 #endif 424 |0x7<<0; /* HS/FS Timeout**/ 425 426 if (dev->pdata->usb_gusbcfg) 427 dflt_gusbcfg = dev->pdata->usb_gusbcfg; 428 429 writel(dflt_gusbcfg, ®->gusbcfg); 430 431 /* 3. Put the OTG device core in the disconnected state.*/ 432 uTemp = readl(®->dctl); 433 uTemp |= SOFT_DISCONNECT; 434 writel(uTemp, ®->dctl); 435 436 udelay(20); 437 438 /* 4. Make the OTG device core exit from the disconnected state.*/ 439 uTemp = readl(®->dctl); 440 uTemp = uTemp & ~SOFT_DISCONNECT; 441 writel(uTemp, ®->dctl); 442 443 /* 5. Configure OTG Core to initial settings of device mode.*/ 444 /* [][1: full speed(30Mhz) 0:high speed]*/ 445 writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg); 446 447 mdelay(1); 448 449 /* 6. Unmask the core interrupts*/ 450 writel(GINTMSK_INIT, ®->gintmsk); 451 452 /* 7. Set NAK bit of EP0, EP1, EP2*/ 453 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl); 454 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl); 455 456 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) { 457 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl); 458 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl); 459 } 460 461 /* 8. Unmask EPO interrupts*/ 462 writel(((1 << EP0_CON) << DAINT_OUT_BIT) 463 | (1 << EP0_CON), ®->daintmsk); 464 465 /* 9. Unmask device OUT EP common interrupts*/ 466 writel(DOEPMSK_INIT, ®->doepmsk); 467 468 /* 10. Unmask device IN EP common interrupts*/ 469 writel(DIEPMSK_INIT, ®->diepmsk); 470 471 rx_fifo_sz = RX_FIFO_SIZE; 472 np_tx_fifo_sz = NPTX_FIFO_SIZE; 473 tx_fifo_sz = PTX_FIFO_SIZE; 474 475 if (dev->pdata->rx_fifo_sz) 476 rx_fifo_sz = dev->pdata->rx_fifo_sz; 477 if (dev->pdata->np_tx_fifo_sz) 478 np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz; 479 if (dev->pdata->tx_fifo_sz) 480 tx_fifo_sz = dev->pdata->tx_fifo_sz; 481 482 /* 11. Set Rx FIFO Size (in 32-bit words) */ 483 writel(rx_fifo_sz, ®->grxfsiz); 484 485 /* 12. Set Non Periodic Tx FIFO Size */ 486 writel((np_tx_fifo_sz << 16) | rx_fifo_sz, 487 ®->gnptxfsiz); 488 489 for (i = 1; i < DWC2_MAX_HW_ENDPOINTS; i++) 490 writel((rx_fifo_sz + np_tx_fifo_sz + tx_fifo_sz*(i-1)) | 491 tx_fifo_sz << 16, ®->dieptxf[i-1]); 492 493 /* Flush the RX FIFO */ 494 writel(RX_FIFO_FLUSH, ®->grstctl); 495 while (readl(®->grstctl) & RX_FIFO_FLUSH) 496 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__); 497 498 /* Flush all the Tx FIFO's */ 499 writel(TX_FIFO_FLUSH_ALL, ®->grstctl); 500 writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl); 501 while (readl(®->grstctl) & TX_FIFO_FLUSH) 502 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__); 503 504 /* 13. Clear NAK bit of EP0, EP1, EP2*/ 505 /* For Slave mode*/ 506 /* EP0: Control OUT */ 507 writel(DEPCTL_EPDIS | DEPCTL_CNAK, 508 ®->out_endp[EP0_CON].doepctl); 509 510 /* 14. Initialize OTG Link Core.*/ 511 writel(GAHBCFG_INIT, ®->gahbcfg); 512 } 513 514 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed) 515 { 516 unsigned int ep_ctrl; 517 int i; 518 519 if (speed == USB_SPEED_HIGH) { 520 ep0_fifo_size = 64; 521 ep_fifo_size = 512; 522 ep_fifo_size2 = 1024; 523 dev->gadget.speed = USB_SPEED_HIGH; 524 } else { 525 ep0_fifo_size = 64; 526 ep_fifo_size = 64; 527 ep_fifo_size2 = 64; 528 dev->gadget.speed = USB_SPEED_FULL; 529 } 530 531 dev->ep[0].ep.maxpacket = ep0_fifo_size; 532 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) 533 dev->ep[i].ep.maxpacket = ep_fifo_size; 534 535 /* EP0 - Control IN (64 bytes)*/ 536 ep_ctrl = readl(®->in_endp[EP0_CON].diepctl); 537 writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl); 538 539 /* EP0 - Control OUT (64 bytes)*/ 540 ep_ctrl = readl(®->out_endp[EP0_CON].doepctl); 541 writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl); 542 } 543 544 static int dwc2_ep_enable(struct usb_ep *_ep, 545 const struct usb_endpoint_descriptor *desc) 546 { 547 struct dwc2_ep *ep; 548 struct dwc2_udc *dev; 549 unsigned long flags = 0; 550 551 debug("%s: %p\n", __func__, _ep); 552 553 ep = container_of(_ep, struct dwc2_ep, ep); 554 if (!_ep || !desc || ep->desc || _ep->name == ep0name 555 || desc->bDescriptorType != USB_DT_ENDPOINT 556 || ep->bEndpointAddress != desc->bEndpointAddress 557 || ep_maxpacket(ep) < 558 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) { 559 560 debug("%s: bad ep or descriptor\n", __func__); 561 return -EINVAL; 562 } 563 564 /* xfer types must match, except that interrupt ~= bulk */ 565 if (ep->bmAttributes != desc->bmAttributes 566 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK 567 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { 568 569 debug("%s: %s type mismatch\n", __func__, _ep->name); 570 return -EINVAL; 571 } 572 573 /* hardware _could_ do smaller, but driver doesn't */ 574 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK && 575 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) > 576 ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) { 577 578 debug("%s: bad %s maxpacket\n", __func__, _ep->name); 579 return -ERANGE; 580 } 581 582 dev = ep->dev; 583 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { 584 585 debug("%s: bogus device state\n", __func__); 586 return -ESHUTDOWN; 587 } 588 589 ep->stopped = 0; 590 ep->desc = desc; 591 ep->pio_irqs = 0; 592 ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)); 593 594 /* Reset halt state */ 595 dwc2_udc_set_nak(ep); 596 dwc2_udc_set_halt(_ep, 0); 597 598 spin_lock_irqsave(&ep->dev->lock, flags); 599 dwc2_udc_ep_activate(ep); 600 spin_unlock_irqrestore(&ep->dev->lock, flags); 601 602 debug("%s: enabled %s, stopped = %d, maxpacket = %d\n", 603 __func__, _ep->name, ep->stopped, ep->ep.maxpacket); 604 return 0; 605 } 606 607 /* 608 * Disable EP 609 */ 610 static int dwc2_ep_disable(struct usb_ep *_ep) 611 { 612 struct dwc2_ep *ep; 613 unsigned long flags = 0; 614 615 debug("%s: %p\n", __func__, _ep); 616 617 ep = container_of(_ep, struct dwc2_ep, ep); 618 if (!_ep || !ep->desc) { 619 debug("%s: %s not enabled\n", __func__, 620 _ep ? ep->ep.name : NULL); 621 return -EINVAL; 622 } 623 624 spin_lock_irqsave(&ep->dev->lock, flags); 625 626 /* Nuke all pending requests */ 627 nuke(ep, -ESHUTDOWN); 628 629 ep->desc = 0; 630 ep->stopped = 1; 631 632 spin_unlock_irqrestore(&ep->dev->lock, flags); 633 634 debug("%s: disabled %s\n", __func__, _ep->name); 635 return 0; 636 } 637 638 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep, 639 gfp_t gfp_flags) 640 { 641 struct dwc2_request *req; 642 643 debug("%s: %s %p\n", __func__, ep->name, ep); 644 645 req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req)); 646 if (!req) 647 return 0; 648 649 memset(req, 0, sizeof *req); 650 INIT_LIST_HEAD(&req->queue); 651 652 return &req->req; 653 } 654 655 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req) 656 { 657 struct dwc2_request *req; 658 659 debug("%s: %p\n", __func__, ep); 660 661 req = container_of(_req, struct dwc2_request, req); 662 WARN_ON(!list_empty(&req->queue)); 663 kfree(req); 664 } 665 666 /* dequeue JUST ONE request */ 667 static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req) 668 { 669 struct dwc2_ep *ep; 670 struct dwc2_request *req; 671 unsigned long flags = 0; 672 673 debug("%s: %p\n", __func__, _ep); 674 675 ep = container_of(_ep, struct dwc2_ep, ep); 676 if (!_ep || ep->ep.name == ep0name) 677 return -EINVAL; 678 679 spin_lock_irqsave(&ep->dev->lock, flags); 680 681 /* make sure it's actually queued on this endpoint */ 682 list_for_each_entry(req, &ep->queue, queue) { 683 if (&req->req == _req) 684 break; 685 } 686 if (&req->req != _req) { 687 spin_unlock_irqrestore(&ep->dev->lock, flags); 688 return -EINVAL; 689 } 690 691 done(ep, req, -ECONNRESET); 692 693 spin_unlock_irqrestore(&ep->dev->lock, flags); 694 return 0; 695 } 696 697 /* 698 * Return bytes in EP FIFO 699 */ 700 static int dwc2_fifo_status(struct usb_ep *_ep) 701 { 702 int count = 0; 703 struct dwc2_ep *ep; 704 705 ep = container_of(_ep, struct dwc2_ep, ep); 706 if (!_ep) { 707 debug("%s: bad ep\n", __func__); 708 return -ENODEV; 709 } 710 711 debug("%s: %d\n", __func__, ep_index(ep)); 712 713 /* LPD can't report unclaimed bytes from IN fifos */ 714 if (ep_is_in(ep)) 715 return -EOPNOTSUPP; 716 717 return count; 718 } 719 720 /* 721 * Flush EP FIFO 722 */ 723 static void dwc2_fifo_flush(struct usb_ep *_ep) 724 { 725 struct dwc2_ep *ep; 726 727 ep = container_of(_ep, struct dwc2_ep, ep); 728 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { 729 debug("%s: bad ep\n", __func__); 730 return; 731 } 732 733 debug("%s: %d\n", __func__, ep_index(ep)); 734 } 735 736 static const struct usb_gadget_ops dwc2_udc_ops = { 737 /* current versions must always be self-powered */ 738 }; 739 740 static struct dwc2_udc memory = { 741 .usb_address = 0, 742 .gadget = { 743 .ops = &dwc2_udc_ops, 744 .ep0 = &memory.ep[0].ep, 745 .name = driver_name, 746 }, 747 748 /* control endpoint */ 749 .ep[0] = { 750 .ep = { 751 .name = ep0name, 752 .ops = &dwc2_ep_ops, 753 .maxpacket = EP0_FIFO_SIZE, 754 }, 755 .dev = &memory, 756 757 .bEndpointAddress = 0, 758 .bmAttributes = 0, 759 760 .ep_type = ep_control, 761 }, 762 763 /* first group of endpoints */ 764 .ep[1] = { 765 .ep = { 766 .name = "ep1in-bulk", 767 .ops = &dwc2_ep_ops, 768 .maxpacket = EP_FIFO_SIZE, 769 }, 770 .dev = &memory, 771 772 .bEndpointAddress = USB_DIR_IN | 1, 773 .bmAttributes = USB_ENDPOINT_XFER_BULK, 774 775 .ep_type = ep_bulk_out, 776 .fifo_num = 1, 777 }, 778 779 .ep[2] = { 780 .ep = { 781 .name = "ep2out-bulk", 782 .ops = &dwc2_ep_ops, 783 .maxpacket = EP_FIFO_SIZE, 784 }, 785 .dev = &memory, 786 787 .bEndpointAddress = USB_DIR_OUT | 2, 788 .bmAttributes = USB_ENDPOINT_XFER_BULK, 789 790 .ep_type = ep_bulk_in, 791 .fifo_num = 2, 792 }, 793 794 .ep[3] = { 795 .ep = { 796 .name = "ep3in-int", 797 .ops = &dwc2_ep_ops, 798 .maxpacket = EP_FIFO_SIZE, 799 }, 800 .dev = &memory, 801 802 .bEndpointAddress = USB_DIR_IN | 3, 803 .bmAttributes = USB_ENDPOINT_XFER_INT, 804 805 .ep_type = ep_interrupt, 806 .fifo_num = 3, 807 }, 808 }; 809 810 /* 811 * probe - binds to the platform device 812 */ 813 814 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata) 815 { 816 struct dwc2_udc *dev = &memory; 817 int retval = 0; 818 819 debug("%s: %p\n", __func__, pdata); 820 821 dev->pdata = pdata; 822 823 reg = (struct dwc2_usbotg_reg *)pdata->regs_otg; 824 825 /* regs_otg = (void *)pdata->regs_otg; */ 826 827 dev->gadget.is_dualspeed = 1; /* Hack only*/ 828 dev->gadget.is_otg = 0; 829 dev->gadget.is_a_peripheral = 0; 830 dev->gadget.b_hnp_enable = 0; 831 dev->gadget.a_hnp_support = 0; 832 dev->gadget.a_alt_hnp_support = 0; 833 834 the_controller = dev; 835 836 usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE, 837 ROUND(sizeof(struct usb_ctrlrequest), 838 CONFIG_SYS_CACHELINE_SIZE)); 839 if (!usb_ctrl) { 840 error("No memory available for UDC!\n"); 841 return -ENOMEM; 842 } 843 844 usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl; 845 846 udc_reinit(dev); 847 848 return retval; 849 } 850 851 int usb_gadget_handle_interrupts(int index) 852 { 853 u32 intr_status = readl(®->gintsts); 854 u32 gintmsk = readl(®->gintmsk); 855 856 if (intr_status & gintmsk) 857 return dwc2_udc_irq(1, (void *)the_controller); 858 return 0; 859 } 860