drivers/usb/gadget/ci_udc.c

   1 /*
   2  * Copyright 2011, Marvell Semiconductor Inc.
   3  * Lei Wen <leiwen@marvell.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  *
   7  * Back ported to the 8xx platform (from the 8260 platform) by
   8  * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
   9  */
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <config.h>
  14 #include <net.h>
  15 #include <malloc.h>
  16 #include <asm/byteorder.h>
  17 #include <asm/errno.h>
  18 #include <asm/io.h>
  19 #include <asm/unaligned.h>
  20 #include <linux/types.h>
  21 #include <linux/usb/ch9.h>
  22 #include <linux/usb/gadget.h>
  23 #include <usb/ci_udc.h>
  24 #include "../host/ehci.h"
  25 #include "ci_udc.h"
  26
  27 /*
  28  * Check if the system has too long cachelines. If the cachelines are
  29  * longer then 128b, the driver will not be able flush/invalidate data
  30  * cache over separate QH entries. We use 128b because one QH entry is
  31  * 64b long and there are always two QH list entries for each endpoint.
  32  */
  33 #if ARCH_DMA_MINALIGN > 128
  34 #error This driver can not work on systems with caches longer than 128b
  35 #endif
  36
  37 #ifndef DEBUG
  38 #define DBG(x...) do {} while (0)
  39 #else
  40 #define DBG(x...) printf(x)
  41 static const char *reqname(unsigned r)
  42 {
  43         switch (r) {
  44         case USB_REQ_GET_STATUS: return "GET_STATUS";
  45         case USB_REQ_CLEAR_FEATURE: return "CLEAR_FEATURE";
  46         case USB_REQ_SET_FEATURE: return "SET_FEATURE";
  47         case USB_REQ_SET_ADDRESS: return "SET_ADDRESS";
  48         case USB_REQ_GET_DESCRIPTOR: return "GET_DESCRIPTOR";
  49         case USB_REQ_SET_DESCRIPTOR: return "SET_DESCRIPTOR";
  50         case USB_REQ_GET_CONFIGURATION: return "GET_CONFIGURATION";
  51         case USB_REQ_SET_CONFIGURATION: return "SET_CONFIGURATION";
  52         case USB_REQ_GET_INTERFACE: return "GET_INTERFACE";
  53         case USB_REQ_SET_INTERFACE: return "SET_INTERFACE";
  54         default: return "*UNKNOWN*";
  55         }
  56 }
  57 #endif
  58
  59 static struct usb_endpoint_descriptor ep0_out_desc = {
  60         .bLength = sizeof(struct usb_endpoint_descriptor),
  61         .bDescriptorType = USB_DT_ENDPOINT,
  62         .bEndpointAddress = 0,
  63         .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
  64 };
  65
  66 static struct usb_endpoint_descriptor ep0_in_desc = {
  67         .bLength = sizeof(struct usb_endpoint_descriptor),
  68         .bDescriptorType = USB_DT_ENDPOINT,
  69         .bEndpointAddress = USB_DIR_IN,
  70         .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
  71 };
  72
  73 static int ci_pullup(struct usb_gadget *gadget, int is_on);
  74 static int ci_ep_enable(struct usb_ep *ep,
  75                 const struct usb_endpoint_descriptor *desc);
  76 static int ci_ep_disable(struct usb_ep *ep);
  77 static int ci_ep_queue(struct usb_ep *ep,
  78                 struct usb_request *req, gfp_t gfp_flags);
  79 static struct usb_request *
  80 ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags);
  81 static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *_req);
  82
  83 static struct usb_gadget_ops ci_udc_ops = {
  84         .pullup = ci_pullup,
  85 };
  86
  87 static struct usb_ep_ops ci_ep_ops = {
  88         .enable         = ci_ep_enable,
  89         .disable        = ci_ep_disable,
  90         .queue          = ci_ep_queue,
  91         .alloc_request  = ci_ep_alloc_request,
  92         .free_request   = ci_ep_free_request,
  93 };
  94
  95 /* Init values for USB endpoints. */
  96 static const struct usb_ep ci_ep_init[2] = {
  97         [0] = { /* EP 0 */
  98                 .maxpacket      = 64,
  99                 .name           = "ep0",
 100                 .ops            = &ci_ep_ops,
 101         },
 102         [1] = { /* EP 1..n */
 103                 .maxpacket      = 512,
 104                 .name           = "ep-",
 105                 .ops            = &ci_ep_ops,
 106         },
 107 };
 108
 109 static struct ci_drv controller = {
 110         .gadget = {
 111                 .name   = "ci_udc",
 112                 .ops    = &ci_udc_ops,
 113                 .is_dualspeed = 1,
 114         },
 115 };
 116
 117 /**
 118  * ci_get_qh() - return queue head for endpoint
 119  * @ep_num:     Endpoint number
 120  * @dir_in:     Direction of the endpoint (IN = 1, OUT = 0)
 121  *
 122  * This function returns the QH associated with particular endpoint
 123  * and it's direction.
 124  */
 125 static struct ept_queue_head *ci_get_qh(int ep_num, int dir_in)
 126 {
 127         return &controller.epts[(ep_num * 2) + dir_in];
 128 }
 129
 130 /**
 131  * ci_get_qtd() - return queue item for endpoint
 132  * @ep_num:     Endpoint number
 133  * @dir_in:     Direction of the endpoint (IN = 1, OUT = 0)
 134  *
 135  * This function returns the QH associated with particular endpoint
 136  * and it's direction.
 137  */
 138 static struct ept_queue_item *ci_get_qtd(int ep_num, int dir_in)
 139 {
 140         return controller.items[(ep_num * 2) + dir_in];
 141 }
 142
 143 /**
 144  * ci_flush_qh - flush cache over queue head
 145  * @ep_num:     Endpoint number
 146  *
 147  * This function flushes cache over QH for particular endpoint.
 148  */
 149 static void ci_flush_qh(int ep_num)
 150 {
 151         struct ept_queue_head *head = ci_get_qh(ep_num, 0);
 152         const uint32_t start = (uint32_t)head;
 153         const uint32_t end = start + 2 * sizeof(*head);
 154
 155         flush_dcache_range(start, end);
 156 }
 157
 158 /**
 159  * ci_invalidate_qh - invalidate cache over queue head
 160  * @ep_num:     Endpoint number
 161  *
 162  * This function invalidates cache over QH for particular endpoint.
 163  */
 164 static void ci_invalidate_qh(int ep_num)
 165 {
 166         struct ept_queue_head *head = ci_get_qh(ep_num, 0);
 167         uint32_t start = (uint32_t)head;
 168         uint32_t end = start + 2 * sizeof(*head);
 169
 170         invalidate_dcache_range(start, end);
 171 }
 172
 173 /**
 174  * ci_flush_qtd - flush cache over queue item
 175  * @ep_num:     Endpoint number
 176  *
 177  * This function flushes cache over qTD pair for particular endpoint.
 178  */
 179 static void ci_flush_qtd(int ep_num)
 180 {
 181         struct ept_queue_item *item = ci_get_qtd(ep_num, 0);
 182         const uint32_t start = (uint32_t)item;
 183         const uint32_t end_raw = start + 2 * sizeof(*item);
 184         const uint32_t end = roundup(end_raw, ARCH_DMA_MINALIGN);
 185
 186         flush_dcache_range(start, end);
 187 }
 188
 189 /**
 190  * ci_invalidate_qtd - invalidate cache over queue item
 191  * @ep_num:     Endpoint number
 192  *
 193  * This function invalidates cache over qTD pair for particular endpoint.
 194  */
 195 static void ci_invalidate_qtd(int ep_num)
 196 {
 197         struct ept_queue_item *item = ci_get_qtd(ep_num, 0);
 198         const uint32_t start = (uint32_t)item;
 199         const uint32_t end_raw = start + 2 * sizeof(*item);
 200         const uint32_t end = roundup(end_raw, ARCH_DMA_MINALIGN);
 201
 202         invalidate_dcache_range(start, end);
 203 }
 204
 205 static struct usb_request *
 206 ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
 207 {
 208         struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
 209         return &ci_ep->req;
 210 }
 211
 212 static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *_req)
 213 {
 214         return;
 215 }
 216
 217 static void ep_enable(int num, int in, int maxpacket)
 218 {
 219         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 220         unsigned n;
 221
 222         n = readl(&udc->epctrl[num]);
 223         if (in)
 224                 n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
 225         else
 226                 n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
 227
 228         if (num != 0) {
 229                 struct ept_queue_head *head = ci_get_qh(num, in);
 230
 231                 head->config = CONFIG_MAX_PKT(maxpacket) | CONFIG_ZLT;
 232                 ci_flush_qh(num);
 233         }
 234         writel(n, &udc->epctrl[num]);
 235 }
 236
 237 static int ci_ep_enable(struct usb_ep *ep,
 238                 const struct usb_endpoint_descriptor *desc)
 239 {
 240         struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
 241         int num, in;
 242         num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 243         in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
 244         ci_ep->desc = desc;
 245
 246         if (num) {
 247                 int max = get_unaligned_le16(&desc->wMaxPacketSize);
 248
 249                 if ((max > 64) && (controller.gadget.speed == USB_SPEED_FULL))
 250                         max = 64;
 251                 if (ep->maxpacket != max) {
 252                         DBG("%s: from %d to %d\n", __func__,
 253                             ep->maxpacket, max);
 254                         ep->maxpacket = max;
 255                 }
 256         }
 257         ep_enable(num, in, ep->maxpacket);
 258         DBG("%s: num=%d maxpacket=%d\n", __func__, num, ep->maxpacket);
 259         return 0;
 260 }
 261
 262 static int ci_ep_disable(struct usb_ep *ep)
 263 {
 264         struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
 265
 266         ci_ep->desc = NULL;
 267         return 0;
 268 }
 269
 270 static int ci_bounce(struct ci_ep *ep, int in)
 271 {
 272         uint32_t addr = (uint32_t)ep->req.buf;
 273         uint32_t ba;
 274
 275         /* Input buffer address is not aligned. */
 276         if (addr & (ARCH_DMA_MINALIGN - 1))
 277                 goto align;
 278
 279         /* Input buffer length is not aligned. */
 280         if (ep->req.length & (ARCH_DMA_MINALIGN - 1))
 281                 goto align;
 282
 283         /* The buffer is well aligned, only flush cache. */
 284         ep->b_len = ep->req.length;
 285         ep->b_buf = ep->req.buf;
 286         goto flush;
 287
 288 align:
 289         /* Use internal buffer for small payloads. */
 290         if (ep->req.length <= 64) {
 291                 ep->b_len = 64;
 292                 ep->b_buf = ep->b_fast;
 293         } else {
 294                 ep->b_len = roundup(ep->req.length, ARCH_DMA_MINALIGN);
 295                 ep->b_buf = memalign(ARCH_DMA_MINALIGN, ep->b_len);
 296                 if (!ep->b_buf)
 297                         return -ENOMEM;
 298         }
 299         if (in)
 300                 memcpy(ep->b_buf, ep->req.buf, ep->req.length);
 301
 302 flush:
 303         ba = (uint32_t)ep->b_buf;
 304         flush_dcache_range(ba, ba + ep->b_len);
 305
 306         return 0;
 307 }
 308
 309 static void ci_debounce(struct ci_ep *ep, int in)
 310 {
 311         uint32_t addr = (uint32_t)ep->req.buf;
 312         uint32_t ba = (uint32_t)ep->b_buf;
 313
 314         if (in) {
 315                 if (addr == ba)
 316                         return;         /* not a bounce */
 317                 goto free;
 318         }
 319         invalidate_dcache_range(ba, ba + ep->b_len);
 320
 321         if (addr == ba)
 322                 return;         /* not a bounce */
 323
 324         memcpy(ep->req.buf, ep->b_buf, ep->req.length);
 325 free:
 326         /* Large payloads use allocated buffer, free it. */
 327         if (ep->b_buf != ep->b_fast)
 328                 free(ep->b_buf);
 329 }
 330
 331 static int ci_ep_queue(struct usb_ep *ep,
 332                 struct usb_request *req, gfp_t gfp_flags)
 333 {
 334         struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
 335         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 336         struct ept_queue_item *item;
 337         struct ept_queue_head *head;
 338         int bit, num, len, in, ret;
 339         num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 340         in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
 341         item = ci_get_qtd(num, in);
 342         head = ci_get_qh(num, in);
 343         len = req->length;
 344
 345         ret = ci_bounce(ci_ep, in);
 346         if (ret)
 347                 return ret;
 348
 349         item->next = TERMINATE;
 350         item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE;
 351         item->page0 = (uint32_t)ci_ep->b_buf;
 352         item->page1 = ((uint32_t)ci_ep->b_buf & 0xfffff000) + 0x1000;
 353         ci_flush_qtd(num);
 354
 355         head->next = (unsigned) item;
 356         head->info = 0;
 357
 358         DBG("ept%d %s queue len %x, buffer %p\n",
 359             num, in ? "in" : "out", len, ci_ep->b_buf);
 360         ci_flush_qh(num);
 361
 362         if (in)
 363                 bit = EPT_TX(num);
 364         else
 365                 bit = EPT_RX(num);
 366
 367         writel(bit, &udc->epprime);
 368
 369         return 0;
 370 }
 371
 372 static void handle_ep_complete(struct ci_ep *ep)
 373 {
 374         struct ept_queue_item *item;
 375         int num, in, len;
 376         num = ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 377         in = (ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
 378         if (num == 0)
 379                 ep->desc = &ep0_out_desc;
 380         item = ci_get_qtd(num, in);
 381         ci_invalidate_qtd(num);
 382
 383         if (item->info & 0xff)
 384                 printf("EP%d/%s FAIL info=%x pg0=%x\n",
 385                        num, in ? "in" : "out", item->info, item->page0);
 386
 387         len = (item->info >> 16) & 0x7fff;
 388         ep->req.length -= len;
 389         ci_debounce(ep, in);
 390
 391         DBG("ept%d %s complete %x\n",
 392                         num, in ? "in" : "out", len);
 393         ep->req.complete(&ep->ep, &ep->req);
 394         if (num == 0) {
 395                 ep->req.length = 0;
 396                 usb_ep_queue(&ep->ep, &ep->req, 0);
 397                 ep->desc = &ep0_in_desc;
 398         }
 399 }
 400
 401 #define SETUP(type, request) (((type) << 8) | (request))
 402
 403 static void handle_setup(void)
 404 {
 405         struct usb_request *req = &controller.ep[0].req;
 406         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 407         struct ept_queue_head *head;
 408         struct usb_ctrlrequest r;
 409         int status = 0;
 410         int num, in, _num, _in, i;
 411         char *buf;
 412         head = ci_get_qh(0, 0); /* EP0 OUT */
 413
 414         ci_invalidate_qh(0);
 415         memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest));
 416         writel(EPT_RX(0), &udc->epstat);
 417         DBG("handle setup %s, %x, %x index %x value %x\n", reqname(r.bRequest),
 418             r.bRequestType, r.bRequest, r.wIndex, r.wValue);
 419
 420         switch (SETUP(r.bRequestType, r.bRequest)) {
 421         case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE):
 422                 _num = r.wIndex & 15;
 423                 _in = !!(r.wIndex & 0x80);
 424
 425                 if ((r.wValue == 0) && (r.wLength == 0)) {
 426                         req->length = 0;
 427                         for (i = 0; i < NUM_ENDPOINTS; i++) {
 428                                 struct ci_ep *ep = &controller.ep[i];
 429
 430                                 if (!ep->desc)
 431                                         continue;
 432                                 num = ep->desc->bEndpointAddress
 433                                                 & USB_ENDPOINT_NUMBER_MASK;
 434                                 in = (ep->desc->bEndpointAddress
 435                                                 & USB_DIR_IN) != 0;
 436                                 if ((num == _num) && (in == _in)) {
 437                                         ep_enable(num, in, ep->ep.maxpacket);
 438                                         usb_ep_queue(controller.gadget.ep0,
 439                                                         req, 0);
 440                                         break;
 441                                 }
 442                         }
 443                 }
 444                 return;
 445
 446         case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS):
 447                 /*
 448                  * write address delayed (will take effect
 449                  * after the next IN txn)
 450                  */
 451                 writel((r.wValue << 25) | (1 << 24), &udc->devaddr);
 452                 req->length = 0;
 453                 usb_ep_queue(controller.gadget.ep0, req, 0);
 454                 return;
 455
 456         case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS):
 457                 req->length = 2;
 458                 buf = (char *)req->buf;
 459                 buf[0] = 1 << USB_DEVICE_SELF_POWERED;
 460                 buf[1] = 0;
 461                 usb_ep_queue(controller.gadget.ep0, req, 0);
 462                 return;
 463         }
 464         /* pass request up to the gadget driver */
 465         if (controller.driver)
 466                 status = controller.driver->setup(&controller.gadget, &r);
 467         else
 468                 status = -ENODEV;
 469
 470         if (!status)
 471                 return;
 472         DBG("STALL reqname %s type %x value %x, index %x\n",
 473             reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex);
 474         writel((1<<16) | (1 << 0), &udc->epctrl[0]);
 475 }
 476
 477 static void stop_activity(void)
 478 {
 479         int i, num, in;
 480         struct ept_queue_head *head;
 481         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 482         writel(readl(&udc->epcomp), &udc->epcomp);
 483         writel(readl(&udc->epstat), &udc->epstat);
 484         writel(0xffffffff, &udc->epflush);
 485
 486         /* error out any pending reqs */
 487         for (i = 0; i < NUM_ENDPOINTS; i++) {
 488                 if (i != 0)
 489                         writel(0, &udc->epctrl[i]);
 490                 if (controller.ep[i].desc) {
 491                         num = controller.ep[i].desc->bEndpointAddress
 492                                 & USB_ENDPOINT_NUMBER_MASK;
 493                         in = (controller.ep[i].desc->bEndpointAddress
 494                                 & USB_DIR_IN) != 0;
 495                         head = ci_get_qh(num, in);
 496                         head->info = INFO_ACTIVE;
 497                         ci_flush_qh(num);
 498                 }
 499         }
 500 }
 501
 502 void udc_irq(void)
 503 {
 504         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 505         unsigned n = readl(&udc->usbsts);
 506         writel(n, &udc->usbsts);
 507         int bit, i, num, in;
 508
 509         n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
 510         if (n == 0)
 511                 return;
 512
 513         if (n & STS_URI) {
 514                 DBG("-- reset --\n");
 515                 stop_activity();
 516         }
 517         if (n & STS_SLI)
 518                 DBG("-- suspend --\n");
 519
 520         if (n & STS_PCI) {
 521                 int max = 64;
 522                 int speed = USB_SPEED_FULL;
 523
 524                 bit = (readl(&udc->portsc) >> 26) & 3;
 525                 DBG("-- portchange %x %s\n", bit, (bit == 2) ? "High" : "Full");
 526                 if (bit == 2) {
 527                         speed = USB_SPEED_HIGH;
 528                         max = 512;
 529                 }
 530                 controller.gadget.speed = speed;
 531                 for (i = 1; i < NUM_ENDPOINTS; i++) {
 532                         if (controller.ep[i].ep.maxpacket > max)
 533                                 controller.ep[i].ep.maxpacket = max;
 534                 }
 535         }
 536
 537         if (n & STS_UEI)
 538                 printf("<UEI %x>\n", readl(&udc->epcomp));
 539
 540         if ((n & STS_UI) || (n & STS_UEI)) {
 541                 n = readl(&udc->epstat);
 542                 if (n & EPT_RX(0))
 543                         handle_setup();
 544
 545                 n = readl(&udc->epcomp);
 546                 if (n != 0)
 547                         writel(n, &udc->epcomp);
 548
 549                 for (i = 0; i < NUM_ENDPOINTS && n; i++) {
 550                         if (controller.ep[i].desc) {
 551                                 num = controller.ep[i].desc->bEndpointAddress
 552                                         & USB_ENDPOINT_NUMBER_MASK;
 553                                 in = (controller.ep[i].desc->bEndpointAddress
 554                                                 & USB_DIR_IN) != 0;
 555                                 bit = (in) ? EPT_TX(num) : EPT_RX(num);
 556                                 if (n & bit)
 557                                         handle_ep_complete(&controller.ep[i]);
 558                         }
 559                 }
 560         }
 561 }
 562
 563 int usb_gadget_handle_interrupts(void)
 564 {
 565         u32 value;
 566         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 567
 568         value = readl(&udc->usbsts);
 569         if (value)
 570                 udc_irq();
 571
 572         return value;
 573 }
 574
 575 static int ci_pullup(struct usb_gadget *gadget, int is_on)
 576 {
 577         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 578         if (is_on) {
 579                 /* RESET */
 580                 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd);
 581                 udelay(200);
 582
 583                 writel((unsigned)controller.epts, &udc->epinitaddr);
 584
 585                 /* select DEVICE mode */
 586                 writel(USBMODE_DEVICE, &udc->usbmode);
 587
 588                 writel(0xffffffff, &udc->epflush);
 589
 590                 /* Turn on the USB connection by enabling the pullup resistor */
 591                 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RUN, &udc->usbcmd);
 592         } else {
 593                 stop_activity();
 594                 writel(USBCMD_FS2, &udc->usbcmd);
 595                 udelay(800);
 596                 if (controller.driver)
 597                         controller.driver->disconnect(gadget);
 598         }
 599
 600         return 0;
 601 }
 602
 603 void udc_disconnect(void)
 604 {
 605         struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
 606         /* disable pullup */
 607         stop_activity();
 608         writel(USBCMD_FS2, &udc->usbcmd);
 609         udelay(800);
 610         if (controller.driver)
 611                 controller.driver->disconnect(&controller.gadget);
 612 }
 613
 614 static int ci_udc_probe(void)
 615 {
 616         struct ept_queue_head *head;
 617         uint8_t *imem;
 618         int i;
 619
 620         const int num = 2 * NUM_ENDPOINTS;
 621
 622         const int eplist_min_align = 4096;
 623         const int eplist_align = roundup(eplist_min_align, ARCH_DMA_MINALIGN);
 624         const int eplist_raw_sz = num * sizeof(struct ept_queue_head);
 625         const int eplist_sz = roundup(eplist_raw_sz, ARCH_DMA_MINALIGN);
 626
 627         const int ilist_align = roundup(ARCH_DMA_MINALIGN, 32);
 628         const int ilist_ent_raw_sz = 2 * sizeof(struct ept_queue_item);
 629         const int ilist_ent_sz = roundup(ilist_ent_raw_sz, ARCH_DMA_MINALIGN);
 630         const int ilist_sz = NUM_ENDPOINTS * ilist_ent_sz;
 631
 632         /* The QH list must be aligned to 4096 bytes. */
 633         controller.epts = memalign(eplist_align, eplist_sz);
 634         if (!controller.epts)
 635                 return -ENOMEM;
 636         memset(controller.epts, 0, eplist_sz);
 637
 638         /*
 639          * Each qTD item must be 32-byte aligned, each qTD touple must be
 640          * cacheline aligned. There are two qTD items for each endpoint and
 641          * only one of them is used for the endpoint at time, so we can group
 642          * them together.
 643          */
 644         controller.items_mem = memalign(ilist_align, ilist_sz);
 645         if (!controller.items_mem) {
 646                 free(controller.epts);
 647                 return -ENOMEM;
 648         }
 649         memset(controller.items_mem, 0, ilist_sz);
 650
 651         for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
 652                 /*
 653                  * Configure QH for each endpoint. The structure of the QH list
 654                  * is such that each two subsequent fields, N and N+1 where N is
 655                  * even, in the QH list represent QH for one endpoint. The Nth
 656                  * entry represents OUT configuration and the N+1th entry does
 657                  * represent IN configuration of the endpoint.
 658                  */
 659                 head = controller.epts + i;
 660                 if (i < 2)
 661                         head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE)
 662                                 | CONFIG_ZLT | CONFIG_IOS;
 663                 else
 664                         head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE)
 665                                 | CONFIG_ZLT;
 666                 head->next = TERMINATE;
 667                 head->info = 0;
 668
 669                 imem = controller.items_mem + ((i >> 1) * ilist_ent_sz);
 670                 if (i & 1)
 671                         imem += sizeof(struct ept_queue_item);
 672
 673                 controller.items[i] = (struct ept_queue_item *)imem;
 674
 675                 if (i & 1) {
 676                         ci_flush_qh(i - 1);
 677                         ci_flush_qtd(i - 1);
 678                 }
 679         }
 680
 681         INIT_LIST_HEAD(&controller.gadget.ep_list);
 682
 683         /* Init EP 0 */
 684         memcpy(&controller.ep[0].ep, &ci_ep_init[0], sizeof(*ci_ep_init));
 685         controller.ep[0].desc = &ep0_in_desc;
 686         controller.gadget.ep0 = &controller.ep[0].ep;
 687         INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
 688
 689         /* Init EP 1..n */
 690         for (i = 1; i < NUM_ENDPOINTS; i++) {
 691                 memcpy(&controller.ep[i].ep, &ci_ep_init[1],
 692                        sizeof(*ci_ep_init));
 693                 list_add_tail(&controller.ep[i].ep.ep_list,
 694                               &controller.gadget.ep_list);
 695         }
 696
 697         return 0;
 698 }
 699
 700 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 701 {
 702         struct ci_udc *udc;
 703         int ret;
 704
 705         if (!driver)
 706                 return -EINVAL;
 707         if (!driver->bind || !driver->setup || !driver->disconnect)
 708                 return -EINVAL;
 709         if (driver->speed != USB_SPEED_FULL && driver->speed != USB_SPEED_HIGH)
 710                 return -EINVAL;
 711
 712         ret = usb_lowlevel_init(0, USB_INIT_DEVICE, (void **)&controller.ctrl);
 713         if (ret)
 714                 return ret;
 715
 716         ret = ci_udc_probe();
 717         if (!ret) {
 718                 udc = (struct ci_udc *)controller.ctrl->hcor;
 719
 720                 /* select ULPI phy */
 721                 writel(PTS(PTS_ENABLE) | PFSC, &udc->portsc);
 722         }
 723
 724         ret = driver->bind(&controller.gadget);
 725         if (ret) {
 726                 DBG("driver->bind() returned %d\n", ret);
 727                 return ret;
 728         }
 729         controller.driver = driver;
 730
 731         return 0;
 732 }
 733
 734 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 735 {
 736         return 0;
 737 }