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 #include <asm/arch/gpio.h>
  35
  36 #include "regs-otg.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/s3c_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 "S3C HS USB OTG Device Driver, (c) Samsung Electronics"
  67 #define DRIVER_VERSION "15 March 2009"
  68
  69 struct s3c_udc  *the_controller;
  70
  71 static const char driver_name[] = "s3c-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 s3c_ep_enable(struct usb_ep *ep,
  88                          const struct usb_endpoint_descriptor *);
  89 static int s3c_ep_disable(struct usb_ep *ep);
  90 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
  91                                              gfp_t gfp_flags);
  92 static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
  93
  94 static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
  95 static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
  96 static int s3c_fifo_status(struct usb_ep *ep);
  97 static void s3c_fifo_flush(struct usb_ep *ep);
  98 static void s3c_ep0_read(struct s3c_udc *dev);
  99 static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
 100 static void s3c_handle_ep0(struct s3c_udc *dev);
 101 static int s3c_ep0_write(struct s3c_udc *dev);
 102 static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
 103 static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
 104 static void stop_activity(struct s3c_udc *dev,
 105                           struct usb_gadget_driver *driver);
 106 static int udc_enable(struct s3c_udc *dev);
 107 static void udc_set_address(struct s3c_udc *dev, unsigned char address);
 108 static void reconfig_usbd(void);
 109 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
 110 static void nuke(struct s3c_ep *ep, int status);
 111 static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
 112 static void s3c_udc_set_nak(struct s3c_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 s3c_ep_ops = {
 128         .enable = s3c_ep_enable,
 129         .disable = s3c_ep_disable,
 130
 131         .alloc_request = s3c_alloc_request,
 132         .free_request = s3c_free_request,
 133
 134         .queue = s3c_queue,
 135         .dequeue = s3c_dequeue,
 136
 137         .set_halt = s3c_udc_set_halt,
 138         .fifo_status = s3c_fifo_status,
 139         .fifo_flush = s3c_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 s3c_usbotg_reg *reg;
 149 struct s3c_usbotg_phy *phy;
 150 static unsigned int usb_phy_ctrl;
 151
 152 bool dfu_usb_get_reset(void)
 153 {
 154         return !!(readl(&reg->gintsts) & INT_RESET);
 155 }
 156
 157 void otg_phy_init(struct s3c_udc *dev)
 158 {
 159         dev->pdata->phy_control(1);
 160
 161         /*USB PHY0 Enable */
 162         printf("USB PHY0 Enable\n");
 163
 164         /* Enable PHY */
 165         writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
 166
 167         if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
 168                 writel((readl(&phy->phypwr)
 169                         &~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
 170                         &~FORCE_SUSPEND_0), &phy->phypwr);
 171         else /* C110 GONI */
 172                 writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
 173                         &~FORCE_SUSPEND_0), &phy->phypwr);
 174
 175         if (s5p_cpu_id == 0x4412)
 176                 writel((readl(&phy->phyclk) & ~(EXYNOS4X12_ID_PULLUP0 |
 177                         EXYNOS4X12_COMMON_ON_N0)) | EXYNOS4X12_CLK_SEL_24MHZ,
 178                        &phy->phyclk); /* PLL 24Mhz */
 179         else
 180                 writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)) |
 181                        CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
 182
 183         writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
 184                | PHY_SW_RST0, &phy->rstcon);
 185         udelay(10);
 186         writel(readl(&phy->rstcon)
 187                &~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
 188         udelay(10);
 189 }
 190
 191 void otg_phy_off(struct s3c_udc *dev)
 192 {
 193         /* reset controller just in case */
 194         writel(PHY_SW_RST0, &phy->rstcon);
 195         udelay(20);
 196         writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
 197         udelay(20);
 198
 199         writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
 200                | FORCE_SUSPEND_0, &phy->phypwr);
 201
 202         writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
 203
 204         writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
 205               &phy->phyclk);
 206
 207         udelay(10000);
 208
 209         dev->pdata->phy_control(0);
 210 }
 211
 212 /***********************************************************/
 213
 214 #include "s3c_udc_otg_xfer_dma.c"
 215
 216 /*
 217  *      udc_disable - disable USB device controller
 218  */
 219 static void udc_disable(struct s3c_udc *dev)
 220 {
 221         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 222
 223         udc_set_address(dev, 0);
 224
 225         dev->ep0state = WAIT_FOR_SETUP;
 226         dev->gadget.speed = USB_SPEED_UNKNOWN;
 227         dev->usb_address = 0;
 228
 229         otg_phy_off(dev);
 230 }
 231
 232 /*
 233  *      udc_reinit - initialize software state
 234  */
 235 static void udc_reinit(struct s3c_udc *dev)
 236 {
 237         unsigned int i;
 238
 239         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 240
 241         /* device/ep0 records init */
 242         INIT_LIST_HEAD(&dev->gadget.ep_list);
 243         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
 244         dev->ep0state = WAIT_FOR_SETUP;
 245
 246         /* basic endpoint records init */
 247         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 248                 struct s3c_ep *ep = &dev->ep[i];
 249
 250                 if (i != 0)
 251                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
 252
 253                 ep->desc = 0;
 254                 ep->stopped = 0;
 255                 INIT_LIST_HEAD(&ep->queue);
 256                 ep->pio_irqs = 0;
 257         }
 258
 259         /* the rest was statically initialized, and is read-only */
 260 }
 261
 262 #define BYTES2MAXP(x)   (x / 8)
 263 #define MAXP2BYTES(x)   (x * 8)
 264
 265 /* until it's enabled, this UDC should be completely invisible
 266  * to any USB host.
 267  */
 268 static int udc_enable(struct s3c_udc *dev)
 269 {
 270         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 271
 272         otg_phy_init(dev);
 273         reconfig_usbd();
 274
 275         debug_cond(DEBUG_SETUP != 0,
 276                    "S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
 277                     readl(&reg->gintmsk));
 278
 279         dev->gadget.speed = USB_SPEED_UNKNOWN;
 280
 281         return 0;
 282 }
 283
 284 /*
 285   Register entry point for the peripheral controller driver.
 286 */
 287 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 288 {
 289         struct s3c_udc *dev = the_controller;
 290         int retval = 0;
 291         unsigned long flags = 0;
 292
 293         debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
 294
 295         if (!driver
 296             || (driver->speed != USB_SPEED_FULL
 297                 && driver->speed != USB_SPEED_HIGH)
 298             || !driver->bind || !driver->disconnect || !driver->setup)
 299                 return -EINVAL;
 300         if (!dev)
 301                 return -ENODEV;
 302         if (dev->driver)
 303                 return -EBUSY;
 304
 305         spin_lock_irqsave(&dev->lock, flags);
 306         /* first hook up the driver ... */
 307         dev->driver = driver;
 308         spin_unlock_irqrestore(&dev->lock, flags);
 309
 310         if (retval) { /* TODO */
 311                 printf("target device_add failed, error %d\n", retval);
 312                 return retval;
 313         }
 314
 315         retval = driver->bind(&dev->gadget);
 316         if (retval) {
 317                 debug_cond(DEBUG_SETUP != 0,
 318                            "%s: bind to driver --> error %d\n",
 319                             dev->gadget.name, retval);
 320                 dev->driver = 0;
 321                 return retval;
 322         }
 323
 324         enable_irq(IRQ_OTG);
 325
 326         debug_cond(DEBUG_SETUP != 0,
 327                    "Registered gadget driver %s\n", dev->gadget.name);
 328         udc_enable(dev);
 329
 330         return 0;
 331 }
 332
 333 /*
 334  * Unregister entry point for the peripheral controller driver.
 335  */
 336 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 337 {
 338         struct s3c_udc *dev = the_controller;
 339         unsigned long flags = 0;
 340
 341         if (!dev)
 342                 return -ENODEV;
 343         if (!driver || driver != dev->driver)
 344                 return -EINVAL;
 345
 346         spin_lock_irqsave(&dev->lock, flags);
 347         dev->driver = 0;
 348         stop_activity(dev, driver);
 349         spin_unlock_irqrestore(&dev->lock, flags);
 350
 351         driver->unbind(&dev->gadget);
 352
 353         disable_irq(IRQ_OTG);
 354
 355         udc_disable(dev);
 356         return 0;
 357 }
 358
 359 /*
 360  *      done - retire a request; caller blocked irqs
 361  */
 362 static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
 363 {
 364         unsigned int stopped = ep->stopped;
 365
 366         debug("%s: %s %p, req = %p, stopped = %d\n",
 367               __func__, ep->ep.name, ep, &req->req, stopped);
 368
 369         list_del_init(&req->queue);
 370
 371         if (likely(req->req.status == -EINPROGRESS))
 372                 req->req.status = status;
 373         else
 374                 status = req->req.status;
 375
 376         if (status && status != -ESHUTDOWN) {
 377                 debug("complete %s req %p stat %d len %u/%u\n",
 378                       ep->ep.name, &req->req, status,
 379                       req->req.actual, req->req.length);
 380         }
 381
 382         /* don't modify queue heads during completion callback */
 383         ep->stopped = 1;
 384
 385 #ifdef DEBUG
 386         printf("calling complete callback\n");
 387         {
 388                 int i, len = req->req.length;
 389
 390                 printf("pkt[%d] = ", req->req.length);
 391                 if (len > 64)
 392                         len = 64;
 393                 for (i = 0; i < len; i++) {
 394                         printf("%02x", ((u8 *)req->req.buf)[i]);
 395                         if ((i & 7) == 7)
 396                                 printf(" ");
 397                 }
 398                 printf("\n");
 399         }
 400 #endif
 401         spin_unlock(&ep->dev->lock);
 402         req->req.complete(&ep->ep, &req->req);
 403         spin_lock(&ep->dev->lock);
 404
 405         debug("callback completed\n");
 406
 407         ep->stopped = stopped;
 408 }
 409
 410 /*
 411  *      nuke - dequeue ALL requests
 412  */
 413 static void nuke(struct s3c_ep *ep, int status)
 414 {
 415         struct s3c_request *req;
 416
 417         debug("%s: %s %p\n", __func__, ep->ep.name, ep);
 418
 419         /* called with irqs blocked */
 420         while (!list_empty(&ep->queue)) {
 421                 req = list_entry(ep->queue.next, struct s3c_request, queue);
 422                 done(ep, req, status);
 423         }
 424 }
 425
 426 static void stop_activity(struct s3c_udc *dev,
 427                           struct usb_gadget_driver *driver)
 428 {
 429         int i;
 430
 431         /* don't disconnect drivers more than once */
 432         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
 433                 driver = 0;
 434         dev->gadget.speed = USB_SPEED_UNKNOWN;
 435
 436         /* prevent new request submissions, kill any outstanding requests  */
 437         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 438                 struct s3c_ep *ep = &dev->ep[i];
 439                 ep->stopped = 1;
 440                 nuke(ep, -ESHUTDOWN);
 441         }
 442
 443         /* report disconnect; the driver is already quiesced */
 444         if (driver) {
 445                 spin_unlock(&dev->lock);
 446                 driver->disconnect(&dev->gadget);
 447                 spin_lock(&dev->lock);
 448         }
 449
 450         /* re-init driver-visible data structures */
 451         udc_reinit(dev);
 452 }
 453
 454 static void reconfig_usbd(void)
 455 {
 456         /* 2. Soft-reset OTG Core and then unreset again. */
 457         int i;
 458         unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
 459
 460         debug("Reseting OTG controller\n");
 461
 462         writel(0<<15            /* PHY Low Power Clock sel*/
 463                 |1<<14          /* Non-Periodic TxFIFO Rewind Enable*/
 464                 |0x5<<10        /* Turnaround time*/
 465                 |0<<9 | 0<<8    /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
 466                                 /* 1:SRP enable] H1= 1,1*/
 467                 |0<<7           /* Ulpi DDR sel*/
 468                 |0<<6           /* 0: high speed utmi+, 1: full speed serial*/
 469                 |0<<4           /* 0: utmi+, 1:ulpi*/
 470                 |1<<3           /* phy i/f  0:8bit, 1:16bit*/
 471                 |0x7<<0,        /* HS/FS Timeout**/
 472                 &reg->gusbcfg);
 473
 474         /* 3. Put the OTG device core in the disconnected state.*/
 475         uTemp = readl(&reg->dctl);
 476         uTemp |= SOFT_DISCONNECT;
 477         writel(uTemp, &reg->dctl);
 478
 479         udelay(20);
 480
 481         /* 4. Make the OTG device core exit from the disconnected state.*/
 482         uTemp = readl(&reg->dctl);
 483         uTemp = uTemp & ~SOFT_DISCONNECT;
 484         writel(uTemp, &reg->dctl);
 485
 486         /* 5. Configure OTG Core to initial settings of device mode.*/
 487         /* [][1: full speed(30Mhz) 0:high speed]*/
 488         writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, &reg->dcfg);
 489
 490         mdelay(1);
 491
 492         /* 6. Unmask the core interrupts*/
 493         writel(GINTMSK_INIT, &reg->gintmsk);
 494
 495         /* 7. Set NAK bit of EP0, EP1, EP2*/
 496         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[EP0_CON].doepctl);
 497         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[EP0_CON].diepctl);
 498
 499         for (i = 1; i < S3C_MAX_ENDPOINTS; i++) {
 500                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[i].doepctl);
 501                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[i].diepctl);
 502         }
 503
 504         /* 8. Unmask EPO interrupts*/
 505         writel(((1 << EP0_CON) << DAINT_OUT_BIT)
 506                | (1 << EP0_CON), &reg->daintmsk);
 507
 508         /* 9. Unmask device OUT EP common interrupts*/
 509         writel(DOEPMSK_INIT, &reg->doepmsk);
 510
 511         /* 10. Unmask device IN EP common interrupts*/
 512         writel(DIEPMSK_INIT, &reg->diepmsk);
 513
 514         /* 11. Set Rx FIFO Size (in 32-bit words) */
 515         writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
 516
 517         /* 12. Set Non Periodic Tx FIFO Size */
 518         writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
 519                &reg->gnptxfsiz);
 520
 521         for (i = 1; i < S3C_MAX_HW_ENDPOINTS; i++)
 522                 writel((PTX_FIFO_SIZE >> 2) << 16 |
 523                        ((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
 524                          PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
 525                        &reg->dieptxf[i-1]);
 526
 527         /* Flush the RX FIFO */
 528         writel(RX_FIFO_FLUSH, &reg->grstctl);
 529         while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
 530                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 531
 532         /* Flush all the Tx FIFO's */
 533         writel(TX_FIFO_FLUSH_ALL, &reg->grstctl);
 534         writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, &reg->grstctl);
 535         while (readl(&reg->grstctl) & TX_FIFO_FLUSH)
 536                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 537
 538         /* 13. Clear NAK bit of EP0, EP1, EP2*/
 539         /* For Slave mode*/
 540         /* EP0: Control OUT */
 541         writel(DEPCTL_EPDIS | DEPCTL_CNAK,
 542                &reg->out_endp[EP0_CON].doepctl);
 543
 544         /* 14. Initialize OTG Link Core.*/
 545         writel(GAHBCFG_INIT, &reg->gahbcfg);
 546 }
 547
 548 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
 549 {
 550         unsigned int ep_ctrl;
 551         int i;
 552
 553         if (speed == USB_SPEED_HIGH) {
 554                 ep0_fifo_size = 64;
 555                 ep_fifo_size = 512;
 556                 ep_fifo_size2 = 1024;
 557                 dev->gadget.speed = USB_SPEED_HIGH;
 558         } else {
 559                 ep0_fifo_size = 64;
 560                 ep_fifo_size = 64;
 561                 ep_fifo_size2 = 64;
 562                 dev->gadget.speed = USB_SPEED_FULL;
 563         }
 564
 565         dev->ep[0].ep.maxpacket = ep0_fifo_size;
 566         for (i = 1; i < S3C_MAX_ENDPOINTS; i++)
 567                 dev->ep[i].ep.maxpacket = ep_fifo_size;
 568
 569         /* EP0 - Control IN (64 bytes)*/
 570         ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
 571         writel(ep_ctrl|(0<<0), &reg->in_endp[EP0_CON].diepctl);
 572
 573         /* EP0 - Control OUT (64 bytes)*/
 574         ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
 575         writel(ep_ctrl|(0<<0), &reg->out_endp[EP0_CON].doepctl);
 576 }
 577
 578 static int s3c_ep_enable(struct usb_ep *_ep,
 579                          const struct usb_endpoint_descriptor *desc)
 580 {
 581         struct s3c_ep *ep;
 582         struct s3c_udc *dev;
 583         unsigned long flags = 0;
 584
 585         debug("%s: %p\n", __func__, _ep);
 586
 587         ep = container_of(_ep, struct s3c_ep, ep);
 588         if (!_ep || !desc || ep->desc || _ep->name == ep0name
 589             || desc->bDescriptorType != USB_DT_ENDPOINT
 590             || ep->bEndpointAddress != desc->bEndpointAddress
 591             || ep_maxpacket(ep) <
 592             le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
 593
 594                 debug("%s: bad ep or descriptor\n", __func__);
 595                 return -EINVAL;
 596         }
 597
 598         /* xfer types must match, except that interrupt ~= bulk */
 599         if (ep->bmAttributes != desc->bmAttributes
 600             && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
 601             && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
 602
 603                 debug("%s: %s type mismatch\n", __func__, _ep->name);
 604                 return -EINVAL;
 605         }
 606
 607         /* hardware _could_ do smaller, but driver doesn't */
 608         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
 609              && le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) !=
 610              ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
 611
 612                 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
 613                 return -ERANGE;
 614         }
 615
 616         dev = ep->dev;
 617         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
 618
 619                 debug("%s: bogus device state\n", __func__);
 620                 return -ESHUTDOWN;
 621         }
 622
 623         ep->stopped = 0;
 624         ep->desc = desc;
 625         ep->pio_irqs = 0;
 626         ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
 627
 628         /* Reset halt state */
 629         s3c_udc_set_nak(ep);
 630         s3c_udc_set_halt(_ep, 0);
 631
 632         spin_lock_irqsave(&ep->dev->lock, flags);
 633         s3c_udc_ep_activate(ep);
 634         spin_unlock_irqrestore(&ep->dev->lock, flags);
 635
 636         debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
 637               __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
 638         return 0;
 639 }
 640
 641 /*
 642  * Disable EP
 643  */
 644 static int s3c_ep_disable(struct usb_ep *_ep)
 645 {
 646         struct s3c_ep *ep;
 647         unsigned long flags = 0;
 648
 649         debug("%s: %p\n", __func__, _ep);
 650
 651         ep = container_of(_ep, struct s3c_ep, ep);
 652         if (!_ep || !ep->desc) {
 653                 debug("%s: %s not enabled\n", __func__,
 654                       _ep ? ep->ep.name : NULL);
 655                 return -EINVAL;
 656         }
 657
 658         spin_lock_irqsave(&ep->dev->lock, flags);
 659
 660         /* Nuke all pending requests */
 661         nuke(ep, -ESHUTDOWN);
 662
 663         ep->desc = 0;
 664         ep->stopped = 1;
 665
 666         spin_unlock_irqrestore(&ep->dev->lock, flags);
 667
 668         debug("%s: disabled %s\n", __func__, _ep->name);
 669         return 0;
 670 }
 671
 672 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 673                                              gfp_t gfp_flags)
 674 {
 675         struct s3c_request *req;
 676
 677         debug("%s: %s %p\n", __func__, ep->name, ep);
 678
 679         req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
 680         if (!req)
 681                 return 0;
 682
 683         memset(req, 0, sizeof *req);
 684         INIT_LIST_HEAD(&req->queue);
 685
 686         return &req->req;
 687 }
 688
 689 static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
 690 {
 691         struct s3c_request *req;
 692
 693         debug("%s: %p\n", __func__, ep);
 694
 695         req = container_of(_req, struct s3c_request, req);
 696         WARN_ON(!list_empty(&req->queue));
 697         kfree(req);
 698 }
 699
 700 /* dequeue JUST ONE request */
 701 static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 702 {
 703         struct s3c_ep *ep;
 704         struct s3c_request *req;
 705         unsigned long flags = 0;
 706
 707         debug("%s: %p\n", __func__, _ep);
 708
 709         ep = container_of(_ep, struct s3c_ep, ep);
 710         if (!_ep || ep->ep.name == ep0name)
 711                 return -EINVAL;
 712
 713         spin_lock_irqsave(&ep->dev->lock, flags);
 714
 715         /* make sure it's actually queued on this endpoint */
 716         list_for_each_entry(req, &ep->queue, queue) {
 717                 if (&req->req == _req)
 718                         break;
 719         }
 720         if (&req->req != _req) {
 721                 spin_unlock_irqrestore(&ep->dev->lock, flags);
 722                 return -EINVAL;
 723         }
 724
 725         done(ep, req, -ECONNRESET);
 726
 727         spin_unlock_irqrestore(&ep->dev->lock, flags);
 728         return 0;
 729 }
 730
 731 /*
 732  * Return bytes in EP FIFO
 733  */
 734 static int s3c_fifo_status(struct usb_ep *_ep)
 735 {
 736         int count = 0;
 737         struct s3c_ep *ep;
 738
 739         ep = container_of(_ep, struct s3c_ep, ep);
 740         if (!_ep) {
 741                 debug("%s: bad ep\n", __func__);
 742                 return -ENODEV;
 743         }
 744
 745         debug("%s: %d\n", __func__, ep_index(ep));
 746
 747         /* LPD can't report unclaimed bytes from IN fifos */
 748         if (ep_is_in(ep))
 749                 return -EOPNOTSUPP;
 750
 751         return count;
 752 }
 753
 754 /*
 755  * Flush EP FIFO
 756  */
 757 static void s3c_fifo_flush(struct usb_ep *_ep)
 758 {
 759         struct s3c_ep *ep;
 760
 761         ep = container_of(_ep, struct s3c_ep, ep);
 762         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
 763                 debug("%s: bad ep\n", __func__);
 764                 return;
 765         }
 766
 767         debug("%s: %d\n", __func__, ep_index(ep));
 768 }
 769
 770 static const struct usb_gadget_ops s3c_udc_ops = {
 771         /* current versions must always be self-powered */
 772 };
 773
 774 static struct s3c_udc memory = {
 775         .usb_address = 0,
 776         .gadget = {
 777                 .ops = &s3c_udc_ops,
 778                 .ep0 = &memory.ep[0].ep,
 779                 .name = driver_name,
 780         },
 781
 782         /* control endpoint */
 783         .ep[0] = {
 784                 .ep = {
 785                         .name = ep0name,
 786                         .ops = &s3c_ep_ops,
 787                         .maxpacket = EP0_FIFO_SIZE,
 788                 },
 789                 .dev = &memory,
 790
 791                 .bEndpointAddress = 0,
 792                 .bmAttributes = 0,
 793
 794                 .ep_type = ep_control,
 795         },
 796
 797         /* first group of endpoints */
 798         .ep[1] = {
 799                 .ep = {
 800                         .name = "ep1in-bulk",
 801                         .ops = &s3c_ep_ops,
 802                         .maxpacket = EP_FIFO_SIZE,
 803                 },
 804                 .dev = &memory,
 805
 806                 .bEndpointAddress = USB_DIR_IN | 1,
 807                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 808
 809                 .ep_type = ep_bulk_out,
 810                 .fifo_num = 1,
 811         },
 812
 813         .ep[2] = {
 814                 .ep = {
 815                         .name = "ep2out-bulk",
 816                         .ops = &s3c_ep_ops,
 817                         .maxpacket = EP_FIFO_SIZE,
 818                 },
 819                 .dev = &memory,
 820
 821                 .bEndpointAddress = USB_DIR_OUT | 2,
 822                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 823
 824                 .ep_type = ep_bulk_in,
 825                 .fifo_num = 2,
 826         },
 827
 828         .ep[3] = {
 829                 .ep = {
 830                         .name = "ep3in-int",
 831                         .ops = &s3c_ep_ops,
 832                         .maxpacket = EP_FIFO_SIZE,
 833                 },
 834                 .dev = &memory,
 835
 836                 .bEndpointAddress = USB_DIR_IN | 3,
 837                 .bmAttributes = USB_ENDPOINT_XFER_INT,
 838
 839                 .ep_type = ep_interrupt,
 840                 .fifo_num = 3,
 841         },
 842 };
 843
 844 /*
 845  *      probe - binds to the platform device
 846  */
 847
 848 int s3c_udc_probe(struct s3c_plat_otg_data *pdata)
 849 {
 850         struct s3c_udc *dev = &memory;
 851         int retval = 0;
 852
 853         debug("%s: %p\n", __func__, pdata);
 854
 855         dev->pdata = pdata;
 856
 857         phy = (struct s3c_usbotg_phy *)pdata->regs_phy;
 858         reg = (struct s3c_usbotg_reg *)pdata->regs_otg;
 859         usb_phy_ctrl = pdata->usb_phy_ctrl;
 860
 861         /* regs_otg = (void *)pdata->regs_otg; */
 862
 863         dev->gadget.is_dualspeed = 1;   /* Hack only*/
 864         dev->gadget.is_otg = 0;
 865         dev->gadget.is_a_peripheral = 0;
 866         dev->gadget.b_hnp_enable = 0;
 867         dev->gadget.a_hnp_support = 0;
 868         dev->gadget.a_alt_hnp_support = 0;
 869
 870         the_controller = dev;
 871
 872         usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
 873                             ROUND(sizeof(struct usb_ctrlrequest),
 874                                   CONFIG_SYS_CACHELINE_SIZE));
 875         if (!usb_ctrl) {
 876                 error("No memory available for UDC!\n");
 877                 return -ENOMEM;
 878         }
 879
 880         usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
 881
 882         udc_reinit(dev);
 883
 884         return retval;
 885 }
 886
 887 int usb_gadget_handle_interrupts()
 888 {
 889         u32 intr_status = readl(&reg->gintsts);
 890         u32 gintmsk = readl(&reg->gintmsk);
 891
 892         if (intr_status & gintmsk)
 893                 return s3c_udc_irq(1, (void *)the_controller);
 894         return 0;
 895 }