git.sur5r.net Git - u-boot/blob - drivers/usb/gadget/s3c_udc_otg.c

   1 /*
   2  * drivers/usb/gadget/s3c_udc_otg.c
   3  * Samsung S3C 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 "regs-otg.h"
  36 #include <usb/lin_gadget_compat.h>
  37
  38 /***********************************************************/
  39
  40 #define OTG_DMA_MODE            1
  41
  42 #define DEBUG_SETUP 0
  43 #define DEBUG_EP0 0
  44 #define DEBUG_ISR 0
  45 #define DEBUG_OUT_EP 0
  46 #define DEBUG_IN_EP 0
  47
  48 #include <usb/s3c_udc.h>
  49
  50 #define EP0_CON         0
  51 #define EP_MASK         0xF
  52
  53 static char *state_names[] = {
  54         "WAIT_FOR_SETUP",
  55         "DATA_STATE_XMIT",
  56         "DATA_STATE_NEED_ZLP",
  57         "WAIT_FOR_OUT_STATUS",
  58         "DATA_STATE_RECV",
  59         "WAIT_FOR_COMPLETE",
  60         "WAIT_FOR_OUT_COMPLETE",
  61         "WAIT_FOR_IN_COMPLETE",
  62         "WAIT_FOR_NULL_COMPLETE",
  63 };
  64
  65 #define DRIVER_DESC "S3C HS USB OTG Device Driver, (c) Samsung Electronics"
  66 #define DRIVER_VERSION "15 March 2009"
  67
  68 struct s3c_udc  *the_controller;
  69
  70 static const char driver_name[] = "s3c-udc";
  71 static const char driver_desc[] = DRIVER_DESC;
  72 static const char ep0name[] = "ep0-control";
  73
  74 /* Max packet size*/
  75 static unsigned int ep0_fifo_size = 64;
  76 static unsigned int ep_fifo_size =  512;
  77 static unsigned int ep_fifo_size2 = 1024;
  78 static int reset_available = 1;
  79
  80 static struct usb_ctrlrequest *usb_ctrl;
  81 static dma_addr_t usb_ctrl_dma_addr;
  82
  83 /*
  84   Local declarations.
  85 */
  86 static int s3c_ep_enable(struct usb_ep *ep,
  87                          const struct usb_endpoint_descriptor *);
  88 static int s3c_ep_disable(struct usb_ep *ep);
  89 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
  90                                              gfp_t gfp_flags);
  91 static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
  92
  93 static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
  94 static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
  95 static int s3c_fifo_status(struct usb_ep *ep);
  96 static void s3c_fifo_flush(struct usb_ep *ep);
  97 static void s3c_ep0_read(struct s3c_udc *dev);
  98 static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
  99 static void s3c_handle_ep0(struct s3c_udc *dev);
 100 static int s3c_ep0_write(struct s3c_udc *dev);
 101 static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
 102 static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
 103 static void stop_activity(struct s3c_udc *dev,
 104                           struct usb_gadget_driver *driver);
 105 static int udc_enable(struct s3c_udc *dev);
 106 static void udc_set_address(struct s3c_udc *dev, unsigned char address);
 107 static void reconfig_usbd(void);
 108 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
 109 static void nuke(struct s3c_ep *ep, int status);
 110 static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
 111 static void s3c_udc_set_nak(struct s3c_ep *ep);
 112
 113 void set_udc_gadget_private_data(void *p)
 114 {
 115         debug_cond(DEBUG_SETUP != 0,
 116                    "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
 117                    the_controller, p);
 118         the_controller->gadget.dev.device_data = p;
 119 }
 120
 121 void *get_udc_gadget_private_data(struct usb_gadget *gadget)
 122 {
 123         return gadget->dev.device_data;
 124 }
 125
 126 static struct usb_ep_ops s3c_ep_ops = {
 127         .enable = s3c_ep_enable,
 128         .disable = s3c_ep_disable,
 129
 130         .alloc_request = s3c_alloc_request,
 131         .free_request = s3c_free_request,
 132
 133         .queue = s3c_queue,
 134         .dequeue = s3c_dequeue,
 135
 136         .set_halt = s3c_udc_set_halt,
 137         .fifo_status = s3c_fifo_status,
 138         .fifo_flush = s3c_fifo_flush,
 139 };
 140
 141 #define create_proc_files() do {} while (0)
 142 #define remove_proc_files() do {} while (0)
 143
 144 /***********************************************************/
 145
 146 void __iomem            *regs_otg;
 147 struct s3c_usbotg_reg *reg;
 148
 149 bool dfu_usb_get_reset(void)
 150 {
 151         return !!(readl(&reg->gintsts) & INT_RESET);
 152 }
 153
 154 void otg_phy_init(struct s3c_udc *dev)
 155 {
 156         unsigned int usb_phy_ctrl = dev->pdata->usb_phy_ctrl;
 157         struct s3c_usbotg_phy *phy =
 158                 (struct s3c_usbotg_phy *)dev->pdata->regs_phy;
 159
 160         dev->pdata->phy_control(1);
 161
 162         /*USB PHY0 Enable */
 163         printf("USB PHY0 Enable\n");
 164
 165         /* Enable PHY */
 166         writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
 167
 168         if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
 169                 writel((readl(&phy->phypwr)
 170                         &~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
 171                         &~FORCE_SUSPEND_0), &phy->phypwr);
 172         else /* C110 GONI */
 173                 writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
 174                         &~FORCE_SUSPEND_0), &phy->phypwr);
 175
 176         if (s5p_cpu_id == 0x4412)
 177                 writel((readl(&phy->phyclk) & ~(EXYNOS4X12_ID_PULLUP0 |
 178                         EXYNOS4X12_COMMON_ON_N0)) | EXYNOS4X12_CLK_SEL_24MHZ,
 179                        &phy->phyclk); /* PLL 24Mhz */
 180         else
 181                 writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)) |
 182                        CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
 183
 184         writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
 185                | PHY_SW_RST0, &phy->rstcon);
 186         udelay(10);
 187         writel(readl(&phy->rstcon)
 188                &~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
 189         udelay(10);
 190 }
 191
 192 void otg_phy_off(struct s3c_udc *dev)
 193 {
 194         unsigned int usb_phy_ctrl = dev->pdata->usb_phy_ctrl;
 195         struct s3c_usbotg_phy *phy =
 196                 (struct s3c_usbotg_phy *)dev->pdata->regs_phy;
 197
 198         /* reset controller just in case */
 199         writel(PHY_SW_RST0, &phy->rstcon);
 200         udelay(20);
 201         writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
 202         udelay(20);
 203
 204         writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
 205                | FORCE_SUSPEND_0, &phy->phypwr);
 206
 207         writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
 208
 209         writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
 210               &phy->phyclk);
 211
 212         udelay(10000);
 213
 214         dev->pdata->phy_control(0);
 215 }
 216
 217 /***********************************************************/
 218
 219 #include "s3c_udc_otg_xfer_dma.c"
 220
 221 /*
 222  *      udc_disable - disable USB device controller
 223  */
 224 static void udc_disable(struct s3c_udc *dev)
 225 {
 226         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 227
 228         udc_set_address(dev, 0);
 229
 230         dev->ep0state = WAIT_FOR_SETUP;
 231         dev->gadget.speed = USB_SPEED_UNKNOWN;
 232         dev->usb_address = 0;
 233
 234         otg_phy_off(dev);
 235 }
 236
 237 /*
 238  *      udc_reinit - initialize software state
 239  */
 240 static void udc_reinit(struct s3c_udc *dev)
 241 {
 242         unsigned int i;
 243
 244         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 245
 246         /* device/ep0 records init */
 247         INIT_LIST_HEAD(&dev->gadget.ep_list);
 248         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
 249         dev->ep0state = WAIT_FOR_SETUP;
 250
 251         /* basic endpoint records init */
 252         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 253                 struct s3c_ep *ep = &dev->ep[i];
 254
 255                 if (i != 0)
 256                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
 257
 258                 ep->desc = 0;
 259                 ep->stopped = 0;
 260                 INIT_LIST_HEAD(&ep->queue);
 261                 ep->pio_irqs = 0;
 262         }
 263
 264         /* the rest was statically initialized, and is read-only */
 265 }
 266
 267 #define BYTES2MAXP(x)   (x / 8)
 268 #define MAXP2BYTES(x)   (x * 8)
 269
 270 /* until it's enabled, this UDC should be completely invisible
 271  * to any USB host.
 272  */
 273 static int udc_enable(struct s3c_udc *dev)
 274 {
 275         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 276
 277         otg_phy_init(dev);
 278         reconfig_usbd();
 279
 280         debug_cond(DEBUG_SETUP != 0,
 281                    "S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
 282                     readl(&reg->gintmsk));
 283
 284         dev->gadget.speed = USB_SPEED_UNKNOWN;
 285
 286         return 0;
 287 }
 288
 289 /*
 290   Register entry point for the peripheral controller driver.
 291 */
 292 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 293 {
 294         struct s3c_udc *dev = the_controller;
 295         int retval = 0;
 296         unsigned long flags = 0;
 297
 298         debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
 299
 300         if (!driver
 301             || (driver->speed != USB_SPEED_FULL
 302                 && driver->speed != USB_SPEED_HIGH)
 303             || !driver->bind || !driver->disconnect || !driver->setup)
 304                 return -EINVAL;
 305         if (!dev)
 306                 return -ENODEV;
 307         if (dev->driver)
 308                 return -EBUSY;
 309
 310         spin_lock_irqsave(&dev->lock, flags);
 311         /* first hook up the driver ... */
 312         dev->driver = driver;
 313         spin_unlock_irqrestore(&dev->lock, flags);
 314
 315         if (retval) { /* TODO */
 316                 printf("target device_add failed, error %d\n", retval);
 317                 return retval;
 318         }
 319
 320         retval = driver->bind(&dev->gadget);
 321         if (retval) {
 322                 debug_cond(DEBUG_SETUP != 0,
 323                            "%s: bind to driver --> error %d\n",
 324                             dev->gadget.name, retval);
 325                 dev->driver = 0;
 326                 return retval;
 327         }
 328
 329         enable_irq(IRQ_OTG);
 330
 331         debug_cond(DEBUG_SETUP != 0,
 332                    "Registered gadget driver %s\n", dev->gadget.name);
 333         udc_enable(dev);
 334
 335         return 0;
 336 }
 337
 338 /*
 339  * Unregister entry point for the peripheral controller driver.
 340  */
 341 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 342 {
 343         struct s3c_udc *dev = the_controller;
 344         unsigned long flags = 0;
 345
 346         if (!dev)
 347                 return -ENODEV;
 348         if (!driver || driver != dev->driver)
 349                 return -EINVAL;
 350
 351         spin_lock_irqsave(&dev->lock, flags);
 352         dev->driver = 0;
 353         stop_activity(dev, driver);
 354         spin_unlock_irqrestore(&dev->lock, flags);
 355
 356         driver->unbind(&dev->gadget);
 357
 358         disable_irq(IRQ_OTG);
 359
 360         udc_disable(dev);
 361         return 0;
 362 }
 363
 364 /*
 365  *      done - retire a request; caller blocked irqs
 366  */
 367 static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
 368 {
 369         unsigned int stopped = ep->stopped;
 370
 371         debug("%s: %s %p, req = %p, stopped = %d\n",
 372               __func__, ep->ep.name, ep, &req->req, stopped);
 373
 374         list_del_init(&req->queue);
 375
 376         if (likely(req->req.status == -EINPROGRESS))
 377                 req->req.status = status;
 378         else
 379                 status = req->req.status;
 380
 381         if (status && status != -ESHUTDOWN) {
 382                 debug("complete %s req %p stat %d len %u/%u\n",
 383                       ep->ep.name, &req->req, status,
 384                       req->req.actual, req->req.length);
 385         }
 386
 387         /* don't modify queue heads during completion callback */
 388         ep->stopped = 1;
 389
 390 #ifdef DEBUG
 391         printf("calling complete callback\n");
 392         {
 393                 int i, len = req->req.length;
 394
 395                 printf("pkt[%d] = ", req->req.length);
 396                 if (len > 64)
 397                         len = 64;
 398                 for (i = 0; i < len; i++) {
 399                         printf("%02x", ((u8 *)req->req.buf)[i]);
 400                         if ((i & 7) == 7)
 401                                 printf(" ");
 402                 }
 403                 printf("\n");
 404         }
 405 #endif
 406         spin_unlock(&ep->dev->lock);
 407         req->req.complete(&ep->ep, &req->req);
 408         spin_lock(&ep->dev->lock);
 409
 410         debug("callback completed\n");
 411
 412         ep->stopped = stopped;
 413 }
 414
 415 /*
 416  *      nuke - dequeue ALL requests
 417  */
 418 static void nuke(struct s3c_ep *ep, int status)
 419 {
 420         struct s3c_request *req;
 421
 422         debug("%s: %s %p\n", __func__, ep->ep.name, ep);
 423
 424         /* called with irqs blocked */
 425         while (!list_empty(&ep->queue)) {
 426                 req = list_entry(ep->queue.next, struct s3c_request, queue);
 427                 done(ep, req, status);
 428         }
 429 }
 430
 431 static void stop_activity(struct s3c_udc *dev,
 432                           struct usb_gadget_driver *driver)
 433 {
 434         int i;
 435
 436         /* don't disconnect drivers more than once */
 437         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
 438                 driver = 0;
 439         dev->gadget.speed = USB_SPEED_UNKNOWN;
 440
 441         /* prevent new request submissions, kill any outstanding requests  */
 442         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 443                 struct s3c_ep *ep = &dev->ep[i];
 444                 ep->stopped = 1;
 445                 nuke(ep, -ESHUTDOWN);
 446         }
 447
 448         /* report disconnect; the driver is already quiesced */
 449         if (driver) {
 450                 spin_unlock(&dev->lock);
 451                 driver->disconnect(&dev->gadget);
 452                 spin_lock(&dev->lock);
 453         }
 454
 455         /* re-init driver-visible data structures */
 456         udc_reinit(dev);
 457 }
 458
 459 static void reconfig_usbd(void)
 460 {
 461         /* 2. Soft-reset OTG Core and then unreset again. */
 462         int i;
 463         unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
 464
 465         debug("Reseting OTG controller\n");
 466
 467         writel(0<<15            /* PHY Low Power Clock sel*/
 468                 |1<<14          /* Non-Periodic TxFIFO Rewind Enable*/
 469                 |0x5<<10        /* Turnaround time*/
 470                 |0<<9 | 0<<8    /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
 471                                 /* 1:SRP enable] H1= 1,1*/
 472                 |0<<7           /* Ulpi DDR sel*/
 473                 |0<<6           /* 0: high speed utmi+, 1: full speed serial*/
 474                 |0<<4           /* 0: utmi+, 1:ulpi*/
 475                 |1<<3           /* phy i/f  0:8bit, 1:16bit*/
 476                 |0x7<<0,        /* HS/FS Timeout**/
 477                 &reg->gusbcfg);
 478
 479         /* 3. Put the OTG device core in the disconnected state.*/
 480         uTemp = readl(&reg->dctl);
 481         uTemp |= SOFT_DISCONNECT;
 482         writel(uTemp, &reg->dctl);
 483
 484         udelay(20);
 485
 486         /* 4. Make the OTG device core exit from the disconnected state.*/
 487         uTemp = readl(&reg->dctl);
 488         uTemp = uTemp & ~SOFT_DISCONNECT;
 489         writel(uTemp, &reg->dctl);
 490
 491         /* 5. Configure OTG Core to initial settings of device mode.*/
 492         /* [][1: full speed(30Mhz) 0:high speed]*/
 493         writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, &reg->dcfg);
 494
 495         mdelay(1);
 496
 497         /* 6. Unmask the core interrupts*/
 498         writel(GINTMSK_INIT, &reg->gintmsk);
 499
 500         /* 7. Set NAK bit of EP0, EP1, EP2*/
 501         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[EP0_CON].doepctl);
 502         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[EP0_CON].diepctl);
 503
 504         for (i = 1; i < S3C_MAX_ENDPOINTS; i++) {
 505                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[i].doepctl);
 506                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[i].diepctl);
 507         }
 508
 509         /* 8. Unmask EPO interrupts*/
 510         writel(((1 << EP0_CON) << DAINT_OUT_BIT)
 511                | (1 << EP0_CON), &reg->daintmsk);
 512
 513         /* 9. Unmask device OUT EP common interrupts*/
 514         writel(DOEPMSK_INIT, &reg->doepmsk);
 515
 516         /* 10. Unmask device IN EP common interrupts*/
 517         writel(DIEPMSK_INIT, &reg->diepmsk);
 518
 519         /* 11. Set Rx FIFO Size (in 32-bit words) */
 520         writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
 521
 522         /* 12. Set Non Periodic Tx FIFO Size */
 523         writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
 524                &reg->gnptxfsiz);
 525
 526         for (i = 1; i < S3C_MAX_HW_ENDPOINTS; i++)
 527                 writel((PTX_FIFO_SIZE >> 2) << 16 |
 528                        ((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
 529                          PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
 530                        &reg->dieptxf[i-1]);
 531
 532         /* Flush the RX FIFO */
 533         writel(RX_FIFO_FLUSH, &reg->grstctl);
 534         while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
 535                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 536
 537         /* Flush all the Tx FIFO's */
 538         writel(TX_FIFO_FLUSH_ALL, &reg->grstctl);
 539         writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, &reg->grstctl);
 540         while (readl(&reg->grstctl) & TX_FIFO_FLUSH)
 541                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 542
 543         /* 13. Clear NAK bit of EP0, EP1, EP2*/
 544         /* For Slave mode*/
 545         /* EP0: Control OUT */
 546         writel(DEPCTL_EPDIS | DEPCTL_CNAK,
 547                &reg->out_endp[EP0_CON].doepctl);
 548
 549         /* 14. Initialize OTG Link Core.*/
 550         writel(GAHBCFG_INIT, &reg->gahbcfg);
 551 }
 552
 553 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
 554 {
 555         unsigned int ep_ctrl;
 556         int i;
 557
 558         if (speed == USB_SPEED_HIGH) {
 559                 ep0_fifo_size = 64;
 560                 ep_fifo_size = 512;
 561                 ep_fifo_size2 = 1024;
 562                 dev->gadget.speed = USB_SPEED_HIGH;
 563         } else {
 564                 ep0_fifo_size = 64;
 565                 ep_fifo_size = 64;
 566                 ep_fifo_size2 = 64;
 567                 dev->gadget.speed = USB_SPEED_FULL;
 568         }
 569
 570         dev->ep[0].ep.maxpacket = ep0_fifo_size;
 571         for (i = 1; i < S3C_MAX_ENDPOINTS; i++)
 572                 dev->ep[i].ep.maxpacket = ep_fifo_size;
 573
 574         /* EP0 - Control IN (64 bytes)*/
 575         ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
 576         writel(ep_ctrl|(0<<0), &reg->in_endp[EP0_CON].diepctl);
 577
 578         /* EP0 - Control OUT (64 bytes)*/
 579         ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
 580         writel(ep_ctrl|(0<<0), &reg->out_endp[EP0_CON].doepctl);
 581 }
 582
 583 static int s3c_ep_enable(struct usb_ep *_ep,
 584                          const struct usb_endpoint_descriptor *desc)
 585 {
 586         struct s3c_ep *ep;
 587         struct s3c_udc *dev;
 588         unsigned long flags = 0;
 589
 590         debug("%s: %p\n", __func__, _ep);
 591
 592         ep = container_of(_ep, struct s3c_ep, ep);
 593         if (!_ep || !desc || ep->desc || _ep->name == ep0name
 594             || desc->bDescriptorType != USB_DT_ENDPOINT
 595             || ep->bEndpointAddress != desc->bEndpointAddress
 596             || ep_maxpacket(ep) <
 597             le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
 598
 599                 debug("%s: bad ep or descriptor\n", __func__);
 600                 return -EINVAL;
 601         }
 602
 603         /* xfer types must match, except that interrupt ~= bulk */
 604         if (ep->bmAttributes != desc->bmAttributes
 605             && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
 606             && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
 607
 608                 debug("%s: %s type mismatch\n", __func__, _ep->name);
 609                 return -EINVAL;
 610         }
 611
 612         /* hardware _could_ do smaller, but driver doesn't */
 613         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
 614              && le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) !=
 615              ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
 616
 617                 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
 618                 return -ERANGE;
 619         }
 620
 621         dev = ep->dev;
 622         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
 623
 624                 debug("%s: bogus device state\n", __func__);
 625                 return -ESHUTDOWN;
 626         }
 627
 628         ep->stopped = 0;
 629         ep->desc = desc;
 630         ep->pio_irqs = 0;
 631         ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
 632
 633         /* Reset halt state */
 634         s3c_udc_set_nak(ep);
 635         s3c_udc_set_halt(_ep, 0);
 636
 637         spin_lock_irqsave(&ep->dev->lock, flags);
 638         s3c_udc_ep_activate(ep);
 639         spin_unlock_irqrestore(&ep->dev->lock, flags);
 640
 641         debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
 642               __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
 643         return 0;
 644 }
 645
 646 /*
 647  * Disable EP
 648  */
 649 static int s3c_ep_disable(struct usb_ep *_ep)
 650 {
 651         struct s3c_ep *ep;
 652         unsigned long flags = 0;
 653
 654         debug("%s: %p\n", __func__, _ep);
 655
 656         ep = container_of(_ep, struct s3c_ep, ep);
 657         if (!_ep || !ep->desc) {
 658                 debug("%s: %s not enabled\n", __func__,
 659                       _ep ? ep->ep.name : NULL);
 660                 return -EINVAL;
 661         }
 662
 663         spin_lock_irqsave(&ep->dev->lock, flags);
 664
 665         /* Nuke all pending requests */
 666         nuke(ep, -ESHUTDOWN);
 667
 668         ep->desc = 0;
 669         ep->stopped = 1;
 670
 671         spin_unlock_irqrestore(&ep->dev->lock, flags);
 672
 673         debug("%s: disabled %s\n", __func__, _ep->name);
 674         return 0;
 675 }
 676
 677 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 678                                              gfp_t gfp_flags)
 679 {
 680         struct s3c_request *req;
 681
 682         debug("%s: %s %p\n", __func__, ep->name, ep);
 683
 684         req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
 685         if (!req)
 686                 return 0;
 687
 688         memset(req, 0, sizeof *req);
 689         INIT_LIST_HEAD(&req->queue);
 690
 691         return &req->req;
 692 }
 693
 694 static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
 695 {
 696         struct s3c_request *req;
 697
 698         debug("%s: %p\n", __func__, ep);
 699
 700         req = container_of(_req, struct s3c_request, req);
 701         WARN_ON(!list_empty(&req->queue));
 702         kfree(req);
 703 }
 704
 705 /* dequeue JUST ONE request */
 706 static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 707 {
 708         struct s3c_ep *ep;
 709         struct s3c_request *req;
 710         unsigned long flags = 0;
 711
 712         debug("%s: %p\n", __func__, _ep);
 713
 714         ep = container_of(_ep, struct s3c_ep, ep);
 715         if (!_ep || ep->ep.name == ep0name)
 716                 return -EINVAL;
 717
 718         spin_lock_irqsave(&ep->dev->lock, flags);
 719
 720         /* make sure it's actually queued on this endpoint */
 721         list_for_each_entry(req, &ep->queue, queue) {
 722                 if (&req->req == _req)
 723                         break;
 724         }
 725         if (&req->req != _req) {
 726                 spin_unlock_irqrestore(&ep->dev->lock, flags);
 727                 return -EINVAL;
 728         }
 729
 730         done(ep, req, -ECONNRESET);
 731
 732         spin_unlock_irqrestore(&ep->dev->lock, flags);
 733         return 0;
 734 }
 735
 736 /*
 737  * Return bytes in EP FIFO
 738  */
 739 static int s3c_fifo_status(struct usb_ep *_ep)
 740 {
 741         int count = 0;
 742         struct s3c_ep *ep;
 743
 744         ep = container_of(_ep, struct s3c_ep, ep);
 745         if (!_ep) {
 746                 debug("%s: bad ep\n", __func__);
 747                 return -ENODEV;
 748         }
 749
 750         debug("%s: %d\n", __func__, ep_index(ep));
 751
 752         /* LPD can't report unclaimed bytes from IN fifos */
 753         if (ep_is_in(ep))
 754                 return -EOPNOTSUPP;
 755
 756         return count;
 757 }
 758
 759 /*
 760  * Flush EP FIFO
 761  */
 762 static void s3c_fifo_flush(struct usb_ep *_ep)
 763 {
 764         struct s3c_ep *ep;
 765
 766         ep = container_of(_ep, struct s3c_ep, ep);
 767         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
 768                 debug("%s: bad ep\n", __func__);
 769                 return;
 770         }
 771
 772         debug("%s: %d\n", __func__, ep_index(ep));
 773 }
 774
 775 static const struct usb_gadget_ops s3c_udc_ops = {
 776         /* current versions must always be self-powered */
 777 };
 778
 779 static struct s3c_udc memory = {
 780         .usb_address = 0,
 781         .gadget = {
 782                 .ops = &s3c_udc_ops,
 783                 .ep0 = &memory.ep[0].ep,
 784                 .name = driver_name,
 785         },
 786
 787         /* control endpoint */
 788         .ep[0] = {
 789                 .ep = {
 790                         .name = ep0name,
 791                         .ops = &s3c_ep_ops,
 792                         .maxpacket = EP0_FIFO_SIZE,
 793                 },
 794                 .dev = &memory,
 795
 796                 .bEndpointAddress = 0,
 797                 .bmAttributes = 0,
 798
 799                 .ep_type = ep_control,
 800         },
 801
 802         /* first group of endpoints */
 803         .ep[1] = {
 804                 .ep = {
 805                         .name = "ep1in-bulk",
 806                         .ops = &s3c_ep_ops,
 807                         .maxpacket = EP_FIFO_SIZE,
 808                 },
 809                 .dev = &memory,
 810
 811                 .bEndpointAddress = USB_DIR_IN | 1,
 812                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 813
 814                 .ep_type = ep_bulk_out,
 815                 .fifo_num = 1,
 816         },
 817
 818         .ep[2] = {
 819                 .ep = {
 820                         .name = "ep2out-bulk",
 821                         .ops = &s3c_ep_ops,
 822                         .maxpacket = EP_FIFO_SIZE,
 823                 },
 824                 .dev = &memory,
 825
 826                 .bEndpointAddress = USB_DIR_OUT | 2,
 827                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 828
 829                 .ep_type = ep_bulk_in,
 830                 .fifo_num = 2,
 831         },
 832
 833         .ep[3] = {
 834                 .ep = {
 835                         .name = "ep3in-int",
 836                         .ops = &s3c_ep_ops,
 837                         .maxpacket = EP_FIFO_SIZE,
 838                 },
 839                 .dev = &memory,
 840
 841                 .bEndpointAddress = USB_DIR_IN | 3,
 842                 .bmAttributes = USB_ENDPOINT_XFER_INT,
 843
 844                 .ep_type = ep_interrupt,
 845                 .fifo_num = 3,
 846         },
 847 };
 848
 849 /*
 850  *      probe - binds to the platform device
 851  */
 852
 853 int s3c_udc_probe(struct s3c_plat_otg_data *pdata)
 854 {
 855         struct s3c_udc *dev = &memory;
 856         int retval = 0;
 857
 858         debug("%s: %p\n", __func__, pdata);
 859
 860         dev->pdata = pdata;
 861
 862         reg = (struct s3c_usbotg_reg *)pdata->regs_otg;
 863
 864         /* regs_otg = (void *)pdata->regs_otg; */
 865
 866         dev->gadget.is_dualspeed = 1;   /* Hack only*/
 867         dev->gadget.is_otg = 0;
 868         dev->gadget.is_a_peripheral = 0;
 869         dev->gadget.b_hnp_enable = 0;
 870         dev->gadget.a_hnp_support = 0;
 871         dev->gadget.a_alt_hnp_support = 0;
 872
 873         the_controller = dev;
 874
 875         usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
 876                             ROUND(sizeof(struct usb_ctrlrequest),
 877                                   CONFIG_SYS_CACHELINE_SIZE));
 878         if (!usb_ctrl) {
 879                 error("No memory available for UDC!\n");
 880                 return -ENOMEM;
 881         }
 882
 883         usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
 884
 885         udc_reinit(dev);
 886
 887         return retval;
 888 }
 889
 890 int usb_gadget_handle_interrupts()
 891 {
 892         u32 intr_status = readl(&reg->gintsts);
 893         u32 gintmsk = readl(&reg->gintmsk);
 894
 895         if (intr_status & gintmsk)
 896                 return s3c_udc_irq(1, (void *)the_controller);
 897         return 0;
 898 }