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  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  31  *
  32  */
  33
  34 #include <common.h>
  35 #include <asm/errno.h>
  36 #include <linux/list.h>
  37 #include <malloc.h>
  38
  39 #include <linux/usb/ch9.h>
  40 #include <usbdescriptors.h>
  41 #include <linux/usb/gadget.h>
  42
  43 #include <asm/byteorder.h>
  44 #include <asm/unaligned.h>
  45 #include <asm/io.h>
  46
  47 #include <asm/mach-types.h>
  48 #include <asm/arch/gpio.h>
  49
  50 #include "regs-otg.h"
  51 #include <usb/lin_gadget_compat.h>
  52
  53 /***********************************************************/
  54
  55 #define OTG_DMA_MODE            1
  56
  57 #undef DEBUG_S3C_UDC_SETUP
  58 #undef DEBUG_S3C_UDC_EP0
  59 #undef DEBUG_S3C_UDC_ISR
  60 #undef DEBUG_S3C_UDC_OUT_EP
  61 #undef DEBUG_S3C_UDC_IN_EP
  62 #undef DEBUG_S3C_UDC
  63
  64 /* #define DEBUG_S3C_UDC_SETUP */
  65 /* #define DEBUG_S3C_UDC_EP0 */
  66 /* #define DEBUG_S3C_UDC_ISR */
  67 /* #define DEBUG_S3C_UDC_OUT_EP */
  68 /* #define DEBUG_S3C_UDC_IN_EP */
  69 /* #define DEBUG_S3C_UDC */
  70
  71 #include <usb/s3c_udc.h>
  72
  73 #define EP0_CON         0
  74 #define EP_MASK         0xF
  75
  76 static char *state_names[] = {
  77         "WAIT_FOR_SETUP",
  78         "DATA_STATE_XMIT",
  79         "DATA_STATE_NEED_ZLP",
  80         "WAIT_FOR_OUT_STATUS",
  81         "DATA_STATE_RECV",
  82         "WAIT_FOR_COMPLETE",
  83         "WAIT_FOR_OUT_COMPLETE",
  84         "WAIT_FOR_IN_COMPLETE",
  85         "WAIT_FOR_NULL_COMPLETE",
  86 };
  87
  88 #define DRIVER_DESC "S3C HS USB OTG Device Driver, (c) Samsung Electronics"
  89 #define DRIVER_VERSION "15 March 2009"
  90
  91 struct s3c_udc  *the_controller;
  92
  93 static const char driver_name[] = "s3c-udc";
  94 static const char driver_desc[] = DRIVER_DESC;
  95 static const char ep0name[] = "ep0-control";
  96
  97 /* Max packet size*/
  98 static unsigned int ep0_fifo_size = 64;
  99 static unsigned int ep_fifo_size =  512;
 100 static unsigned int ep_fifo_size2 = 1024;
 101 static int reset_available = 1;
 102
 103 static struct usb_ctrlrequest *usb_ctrl;
 104 static dma_addr_t usb_ctrl_dma_addr;
 105
 106 /*
 107   Local declarations.
 108 */
 109 static int s3c_ep_enable(struct usb_ep *ep,
 110                          const struct usb_endpoint_descriptor *);
 111 static int s3c_ep_disable(struct usb_ep *ep);
 112 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 113                                              gfp_t gfp_flags);
 114 static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
 115
 116 static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
 117 static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
 118 static int s3c_fifo_status(struct usb_ep *ep);
 119 static void s3c_fifo_flush(struct usb_ep *ep);
 120 static void s3c_ep0_read(struct s3c_udc *dev);
 121 static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
 122 static void s3c_handle_ep0(struct s3c_udc *dev);
 123 static int s3c_ep0_write(struct s3c_udc *dev);
 124 static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
 125 static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
 126 static void stop_activity(struct s3c_udc *dev,
 127                           struct usb_gadget_driver *driver);
 128 static int udc_enable(struct s3c_udc *dev);
 129 static void udc_set_address(struct s3c_udc *dev, unsigned char address);
 130 static void reconfig_usbd(void);
 131 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
 132 static void nuke(struct s3c_ep *ep, int status);
 133 static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
 134 static void s3c_udc_set_nak(struct s3c_ep *ep);
 135
 136 static struct usb_ep_ops s3c_ep_ops = {
 137         .enable = s3c_ep_enable,
 138         .disable = s3c_ep_disable,
 139
 140         .alloc_request = s3c_alloc_request,
 141         .free_request = s3c_free_request,
 142
 143         .queue = s3c_queue,
 144         .dequeue = s3c_dequeue,
 145
 146         .set_halt = s3c_udc_set_halt,
 147         .fifo_status = s3c_fifo_status,
 148         .fifo_flush = s3c_fifo_flush,
 149 };
 150
 151 #define create_proc_files() do {} while (0)
 152 #define remove_proc_files() do {} while (0)
 153
 154 /***********************************************************/
 155
 156 void __iomem            *regs_otg;
 157 struct s3c_usbotg_reg *reg;
 158 struct s3c_usbotg_phy *phy;
 159 static unsigned int usb_phy_ctrl;
 160
 161 void otg_phy_init(struct s3c_udc *dev)
 162 {
 163         dev->pdata->phy_control(1);
 164
 165         /*USB PHY0 Enable */
 166         printf("USB PHY0 Enable\n");
 167
 168         /* Enable PHY */
 169         writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
 170
 171         if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
 172                 writel((readl(&phy->phypwr)
 173                         &~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
 174                         &~FORCE_SUSPEND_0), &phy->phypwr);
 175         else /* C110 GONI */
 176                 writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
 177                         &~FORCE_SUSPEND_0), &phy->phypwr);
 178
 179         writel((readl(&phy->phyclk) &~(ID_PULLUP0 | COMMON_ON_N0)) |
 180                CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
 181
 182         writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
 183                | PHY_SW_RST0, &phy->rstcon);
 184         udelay(10);
 185         writel(readl(&phy->rstcon)
 186                &~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
 187         udelay(10);
 188 }
 189
 190 void otg_phy_off(struct s3c_udc *dev)
 191 {
 192         /* reset controller just in case */
 193         writel(PHY_SW_RST0, &phy->rstcon);
 194         udelay(20);
 195         writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
 196         udelay(20);
 197
 198         writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
 199                | FORCE_SUSPEND_0, &phy->phypwr);
 200
 201         writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
 202
 203         writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
 204               &phy->phyclk);
 205
 206         udelay(10000);
 207
 208         dev->pdata->phy_control(0);
 209 }
 210
 211 /***********************************************************/
 212
 213 #include "s3c_udc_otg_xfer_dma.c"
 214
 215 /*
 216  *      udc_disable - disable USB device controller
 217  */
 218 static void udc_disable(struct s3c_udc *dev)
 219 {
 220         DEBUG_SETUP("%s: %p\n", __func__, dev);
 221
 222         udc_set_address(dev, 0);
 223
 224         dev->ep0state = WAIT_FOR_SETUP;
 225         dev->gadget.speed = USB_SPEED_UNKNOWN;
 226         dev->usb_address = 0;
 227
 228         otg_phy_off(dev);
 229 }
 230
 231 /*
 232  *      udc_reinit - initialize software state
 233  */
 234 static void udc_reinit(struct s3c_udc *dev)
 235 {
 236         unsigned int i;
 237
 238         DEBUG_SETUP("%s: %p\n", __func__, dev);
 239
 240         /* device/ep0 records init */
 241         INIT_LIST_HEAD(&dev->gadget.ep_list);
 242         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
 243         dev->ep0state = WAIT_FOR_SETUP;
 244
 245         /* basic endpoint records init */
 246         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 247                 struct s3c_ep *ep = &dev->ep[i];
 248
 249                 if (i != 0)
 250                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
 251
 252                 ep->desc = 0;
 253                 ep->stopped = 0;
 254                 INIT_LIST_HEAD(&ep->queue);
 255                 ep->pio_irqs = 0;
 256         }
 257
 258         /* the rest was statically initialized, and is read-only */
 259 }
 260
 261 #define BYTES2MAXP(x)   (x / 8)
 262 #define MAXP2BYTES(x)   (x * 8)
 263
 264 /* until it's enabled, this UDC should be completely invisible
 265  * to any USB host.
 266  */
 267 static int udc_enable(struct s3c_udc *dev)
 268 {
 269         DEBUG_SETUP("%s: %p\n", __func__, dev);
 270
 271         otg_phy_init(dev);
 272         reconfig_usbd();
 273
 274         DEBUG_SETUP("S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
 275                     readl(&reg->gintmsk));
 276
 277         dev->gadget.speed = USB_SPEED_UNKNOWN;
 278
 279         return 0;
 280 }
 281
 282 /*
 283   Register entry point for the peripheral controller driver.
 284 */
 285 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 286 {
 287         struct s3c_udc *dev = the_controller;
 288         int retval = 0;
 289         unsigned long flags;
 290
 291         DEBUG_SETUP("%s: %s\n", __func__, "no name");
 292
 293         if (!driver
 294             || (driver->speed != USB_SPEED_FULL
 295                 && driver->speed != USB_SPEED_HIGH)
 296             || !driver->bind || !driver->disconnect || !driver->setup)
 297                 return -EINVAL;
 298         if (!dev)
 299                 return -ENODEV;
 300         if (dev->driver)
 301                 return -EBUSY;
 302
 303         spin_lock_irqsave(&dev->lock, flags);
 304         /* first hook up the driver ... */
 305         dev->driver = driver;
 306         spin_unlock_irqrestore(&dev->lock, flags);
 307
 308         if (retval) { /* TODO */
 309                 printf("target device_add failed, error %d\n", retval);
 310                 return retval;
 311         }
 312
 313         retval = driver->bind(&dev->gadget);
 314         if (retval) {
 315                 DEBUG_SETUP("%s: bind to driver --> error %d\n",
 316                             dev->gadget.name, retval);
 317                 dev->driver = 0;
 318                 return retval;
 319         }
 320
 321         enable_irq(IRQ_OTG);
 322
 323         DEBUG_SETUP("Registered gadget driver %s\n", dev->gadget.name);
 324         udc_enable(dev);
 325
 326         return 0;
 327 }
 328
 329 /*
 330  * Unregister entry point for the peripheral controller driver.
 331  */
 332 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 333 {
 334         struct s3c_udc *dev = the_controller;
 335         unsigned long flags;
 336
 337         if (!dev)
 338                 return -ENODEV;
 339         if (!driver || driver != dev->driver)
 340                 return -EINVAL;
 341
 342         spin_lock_irqsave(&dev->lock, flags);
 343         dev->driver = 0;
 344         stop_activity(dev, driver);
 345         spin_unlock_irqrestore(&dev->lock, flags);
 346
 347         driver->unbind(&dev->gadget);
 348
 349         disable_irq(IRQ_OTG);
 350
 351         udc_disable(dev);
 352         return 0;
 353 }
 354
 355 /*
 356  *      done - retire a request; caller blocked irqs
 357  */
 358 static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
 359 {
 360         unsigned int stopped = ep->stopped;
 361
 362         debug("%s: %s %p, req = %p, stopped = %d\n",
 363               __func__, ep->ep.name, ep, &req->req, stopped);
 364
 365         list_del_init(&req->queue);
 366
 367         if (likely(req->req.status == -EINPROGRESS))
 368                 req->req.status = status;
 369         else
 370                 status = req->req.status;
 371
 372         if (status && status != -ESHUTDOWN) {
 373                 debug("complete %s req %p stat %d len %u/%u\n",
 374                       ep->ep.name, &req->req, status,
 375                       req->req.actual, req->req.length);
 376         }
 377
 378         /* don't modify queue heads during completion callback */
 379         ep->stopped = 1;
 380
 381 #ifdef DEBUG_S3C_UDC
 382         printf("calling complete callback\n");
 383         {
 384                 int i, len = req->req.length;
 385
 386                 printf("pkt[%d] = ", req->req.length);
 387                 if (len > 64)
 388                         len = 64;
 389                 for (i = 0; i < len; i++) {
 390                         printf("%02x", ((u8 *)req->req.buf)[i]);
 391                         if ((i & 7) == 7)
 392                                 printf(" ");
 393                 }
 394                 printf("\n");
 395         }
 396 #endif
 397         spin_unlock(&ep->dev->lock);
 398         req->req.complete(&ep->ep, &req->req);
 399         spin_lock(&ep->dev->lock);
 400
 401         debug("callback completed\n");
 402
 403         ep->stopped = stopped;
 404 }
 405
 406 /*
 407  *      nuke - dequeue ALL requests
 408  */
 409 static void nuke(struct s3c_ep *ep, int status)
 410 {
 411         struct s3c_request *req;
 412
 413         debug("%s: %s %p\n", __func__, ep->ep.name, ep);
 414
 415         /* called with irqs blocked */
 416         while (!list_empty(&ep->queue)) {
 417                 req = list_entry(ep->queue.next, struct s3c_request, queue);
 418                 done(ep, req, status);
 419         }
 420 }
 421
 422 static void stop_activity(struct s3c_udc *dev,
 423                           struct usb_gadget_driver *driver)
 424 {
 425         int i;
 426
 427         /* don't disconnect drivers more than once */
 428         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
 429                 driver = 0;
 430         dev->gadget.speed = USB_SPEED_UNKNOWN;
 431
 432         /* prevent new request submissions, kill any outstanding requests  */
 433         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 434                 struct s3c_ep *ep = &dev->ep[i];
 435                 ep->stopped = 1;
 436                 nuke(ep, -ESHUTDOWN);
 437         }
 438
 439         /* report disconnect; the driver is already quiesced */
 440         if (driver) {
 441                 spin_unlock(&dev->lock);
 442                 driver->disconnect(&dev->gadget);
 443                 spin_lock(&dev->lock);
 444         }
 445
 446         /* re-init driver-visible data structures */
 447         udc_reinit(dev);
 448 }
 449
 450 static void reconfig_usbd(void)
 451 {
 452         /* 2. Soft-reset OTG Core and then unreset again. */
 453         int i;
 454         unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
 455
 456         debug("Reseting OTG controller\n");
 457
 458         writel(0<<15            /* PHY Low Power Clock sel*/
 459                 |1<<14          /* Non-Periodic TxFIFO Rewind Enable*/
 460                 |0x5<<10        /* Turnaround time*/
 461                 |0<<9 | 0<<8    /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
 462                                 /* 1:SRP enable] H1= 1,1*/
 463                 |0<<7           /* Ulpi DDR sel*/
 464                 |0<<6           /* 0: high speed utmi+, 1: full speed serial*/
 465                 |0<<4           /* 0: utmi+, 1:ulpi*/
 466                 |1<<3           /* phy i/f  0:8bit, 1:16bit*/
 467                 |0x7<<0,        /* HS/FS Timeout**/
 468                 &reg->gusbcfg);
 469
 470         /* 3. Put the OTG device core in the disconnected state.*/
 471         uTemp = readl(&reg->dctl);
 472         uTemp |= SOFT_DISCONNECT;
 473         writel(uTemp, &reg->dctl);
 474
 475         udelay(20);
 476
 477         /* 4. Make the OTG device core exit from the disconnected state.*/
 478         uTemp = readl(&reg->dctl);
 479         uTemp = uTemp & ~SOFT_DISCONNECT;
 480         writel(uTemp, &reg->dctl);
 481
 482         /* 5. Configure OTG Core to initial settings of device mode.*/
 483         /* [][1: full speed(30Mhz) 0:high speed]*/
 484         writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, &reg->dcfg);
 485
 486         mdelay(1);
 487
 488         /* 6. Unmask the core interrupts*/
 489         writel(GINTMSK_INIT, &reg->gintmsk);
 490
 491         /* 7. Set NAK bit of EP0, EP1, EP2*/
 492         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[EP0_CON].doepctl);
 493         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[EP0_CON].diepctl);
 494
 495         for (i = 1; i < S3C_MAX_ENDPOINTS; i++) {
 496                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[i].doepctl);
 497                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[i].diepctl);
 498         }
 499
 500         /* 8. Unmask EPO interrupts*/
 501         writel(((1 << EP0_CON) << DAINT_OUT_BIT)
 502                | (1 << EP0_CON), &reg->daintmsk);
 503
 504         /* 9. Unmask device OUT EP common interrupts*/
 505         writel(DOEPMSK_INIT, &reg->doepmsk);
 506
 507         /* 10. Unmask device IN EP common interrupts*/
 508         writel(DIEPMSK_INIT, &reg->diepmsk);
 509
 510         /* 11. Set Rx FIFO Size (in 32-bit words) */
 511         writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
 512
 513         /* 12. Set Non Periodic Tx FIFO Size */
 514         writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
 515                &reg->gnptxfsiz);
 516
 517         for (i = 1; i < S3C_MAX_HW_ENDPOINTS; i++)
 518                 writel((PTX_FIFO_SIZE >> 2) << 16 |
 519                        ((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
 520                          PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
 521                        &reg->dieptxf[i-1]);
 522
 523         /* Flush the RX FIFO */
 524         writel(RX_FIFO_FLUSH, &reg->grstctl);
 525         while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
 526                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 527
 528         /* Flush all the Tx FIFO's */
 529         writel(TX_FIFO_FLUSH_ALL, &reg->grstctl);
 530         writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, &reg->grstctl);
 531         while (readl(&reg->grstctl) & TX_FIFO_FLUSH)
 532                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 533
 534         /* 13. Clear NAK bit of EP0, EP1, EP2*/
 535         /* For Slave mode*/
 536         /* EP0: Control OUT */
 537         writel(DEPCTL_EPDIS | DEPCTL_CNAK,
 538                &reg->out_endp[EP0_CON].doepctl);
 539
 540         /* 14. Initialize OTG Link Core.*/
 541         writel(GAHBCFG_INIT, &reg->gahbcfg);
 542 }
 543
 544 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
 545 {
 546         unsigned int ep_ctrl;
 547         int i;
 548
 549         if (speed == USB_SPEED_HIGH) {
 550                 ep0_fifo_size = 64;
 551                 ep_fifo_size = 512;
 552                 ep_fifo_size2 = 1024;
 553                 dev->gadget.speed = USB_SPEED_HIGH;
 554         } else {
 555                 ep0_fifo_size = 64;
 556                 ep_fifo_size = 64;
 557                 ep_fifo_size2 = 64;
 558                 dev->gadget.speed = USB_SPEED_FULL;
 559         }
 560
 561         dev->ep[0].ep.maxpacket = ep0_fifo_size;
 562         for (i = 1; i < S3C_MAX_ENDPOINTS; i++)
 563                 dev->ep[i].ep.maxpacket = ep_fifo_size;
 564
 565         /* EP0 - Control IN (64 bytes)*/
 566         ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
 567         writel(ep_ctrl|(0<<0), &reg->in_endp[EP0_CON].diepctl);
 568
 569         /* EP0 - Control OUT (64 bytes)*/
 570         ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
 571         writel(ep_ctrl|(0<<0), &reg->out_endp[EP0_CON].doepctl);
 572 }
 573
 574 static int s3c_ep_enable(struct usb_ep *_ep,
 575                          const struct usb_endpoint_descriptor *desc)
 576 {
 577         struct s3c_ep *ep;
 578         struct s3c_udc *dev;
 579         unsigned long flags;
 580
 581         debug("%s: %p\n", __func__, _ep);
 582
 583         ep = container_of(_ep, struct s3c_ep, ep);
 584         if (!_ep || !desc || ep->desc || _ep->name == ep0name
 585             || desc->bDescriptorType != USB_DT_ENDPOINT
 586             || ep->bEndpointAddress != desc->bEndpointAddress
 587             || ep_maxpacket(ep) <
 588             le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
 589
 590                 debug("%s: bad ep or descriptor\n", __func__);
 591                 return -EINVAL;
 592         }
 593
 594         /* xfer types must match, except that interrupt ~= bulk */
 595         if (ep->bmAttributes != desc->bmAttributes
 596             && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
 597             && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
 598
 599                 debug("%s: %s type mismatch\n", __func__, _ep->name);
 600                 return -EINVAL;
 601         }
 602
 603         /* hardware _could_ do smaller, but driver doesn't */
 604         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
 605              && le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) !=
 606              ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
 607
 608                 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
 609                 return -ERANGE;
 610         }
 611
 612         dev = ep->dev;
 613         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
 614
 615                 debug("%s: bogus device state\n", __func__);
 616                 return -ESHUTDOWN;
 617         }
 618
 619         ep->stopped = 0;
 620         ep->desc = desc;
 621         ep->pio_irqs = 0;
 622         ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
 623
 624         /* Reset halt state */
 625         s3c_udc_set_nak(ep);
 626         s3c_udc_set_halt(_ep, 0);
 627
 628         spin_lock_irqsave(&ep->dev->lock, flags);
 629         s3c_udc_ep_activate(ep);
 630         spin_unlock_irqrestore(&ep->dev->lock, flags);
 631
 632         debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
 633               __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
 634         return 0;
 635 }
 636
 637 /*
 638  * Disable EP
 639  */
 640 static int s3c_ep_disable(struct usb_ep *_ep)
 641 {
 642         struct s3c_ep *ep;
 643         unsigned long flags;
 644
 645         debug("%s: %p\n", __func__, _ep);
 646
 647         ep = container_of(_ep, struct s3c_ep, ep);
 648         if (!_ep || !ep->desc) {
 649                 debug("%s: %s not enabled\n", __func__,
 650                       _ep ? ep->ep.name : NULL);
 651                 return -EINVAL;
 652         }
 653
 654         spin_lock_irqsave(&ep->dev->lock, flags);
 655
 656         /* Nuke all pending requests */
 657         nuke(ep, -ESHUTDOWN);
 658
 659         ep->desc = 0;
 660         ep->stopped = 1;
 661
 662         spin_unlock_irqrestore(&ep->dev->lock, flags);
 663
 664         debug("%s: disabled %s\n", __func__, _ep->name);
 665         return 0;
 666 }
 667
 668 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 669                                              gfp_t gfp_flags)
 670 {
 671         struct s3c_request *req;
 672
 673         debug("%s: %s %p\n", __func__, ep->name, ep);
 674
 675         req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
 676         if (!req)
 677                 return 0;
 678
 679         memset(req, 0, sizeof *req);
 680         INIT_LIST_HEAD(&req->queue);
 681
 682         return &req->req;
 683 }
 684
 685 static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
 686 {
 687         struct s3c_request *req;
 688
 689         debug("%s: %p\n", __func__, ep);
 690
 691         req = container_of(_req, struct s3c_request, req);
 692         WARN_ON(!list_empty(&req->queue));
 693         kfree(req);
 694 }
 695
 696 /* dequeue JUST ONE request */
 697 static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 698 {
 699         struct s3c_ep *ep;
 700         struct s3c_request *req;
 701         unsigned long flags;
 702
 703         debug("%s: %p\n", __func__, _ep);
 704
 705         ep = container_of(_ep, struct s3c_ep, ep);
 706         if (!_ep || ep->ep.name == ep0name)
 707                 return -EINVAL;
 708
 709         spin_lock_irqsave(&ep->dev->lock, flags);
 710
 711         /* make sure it's actually queued on this endpoint */
 712         list_for_each_entry(req, &ep->queue, queue) {
 713                 if (&req->req == _req)
 714                         break;
 715         }
 716         if (&req->req != _req) {
 717                 spin_unlock_irqrestore(&ep->dev->lock, flags);
 718                 return -EINVAL;
 719         }
 720
 721         done(ep, req, -ECONNRESET);
 722
 723         spin_unlock_irqrestore(&ep->dev->lock, flags);
 724         return 0;
 725 }
 726
 727 /*
 728  * Return bytes in EP FIFO
 729  */
 730 static int s3c_fifo_status(struct usb_ep *_ep)
 731 {
 732         int count = 0;
 733         struct s3c_ep *ep;
 734
 735         ep = container_of(_ep, struct s3c_ep, ep);
 736         if (!_ep) {
 737                 debug("%s: bad ep\n", __func__);
 738                 return -ENODEV;
 739         }
 740
 741         debug("%s: %d\n", __func__, ep_index(ep));
 742
 743         /* LPD can't report unclaimed bytes from IN fifos */
 744         if (ep_is_in(ep))
 745                 return -EOPNOTSUPP;
 746
 747         return count;
 748 }
 749
 750 /*
 751  * Flush EP FIFO
 752  */
 753 static void s3c_fifo_flush(struct usb_ep *_ep)
 754 {
 755         struct s3c_ep *ep;
 756
 757         ep = container_of(_ep, struct s3c_ep, ep);
 758         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
 759                 debug("%s: bad ep\n", __func__);
 760                 return;
 761         }
 762
 763         debug("%s: %d\n", __func__, ep_index(ep));
 764 }
 765
 766 static const struct usb_gadget_ops s3c_udc_ops = {
 767         /* current versions must always be self-powered */
 768 };
 769
 770 static struct s3c_udc memory = {
 771         .usb_address = 0,
 772         .gadget = {
 773                 .ops = &s3c_udc_ops,
 774                 .ep0 = &memory.ep[0].ep,
 775                 .name = driver_name,
 776         },
 777
 778         /* control endpoint */
 779         .ep[0] = {
 780                 .ep = {
 781                         .name = ep0name,
 782                         .ops = &s3c_ep_ops,
 783                         .maxpacket = EP0_FIFO_SIZE,
 784                 },
 785                 .dev = &memory,
 786
 787                 .bEndpointAddress = 0,
 788                 .bmAttributes = 0,
 789
 790                 .ep_type = ep_control,
 791         },
 792
 793         /* first group of endpoints */
 794         .ep[1] = {
 795                 .ep = {
 796                         .name = "ep1in-bulk",
 797                         .ops = &s3c_ep_ops,
 798                         .maxpacket = EP_FIFO_SIZE,
 799                 },
 800                 .dev = &memory,
 801
 802                 .bEndpointAddress = USB_DIR_IN | 1,
 803                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 804
 805                 .ep_type = ep_bulk_out,
 806                 .fifo_num = 1,
 807         },
 808
 809         .ep[2] = {
 810                 .ep = {
 811                         .name = "ep2out-bulk",
 812                         .ops = &s3c_ep_ops,
 813                         .maxpacket = EP_FIFO_SIZE,
 814                 },
 815                 .dev = &memory,
 816
 817                 .bEndpointAddress = USB_DIR_OUT | 2,
 818                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 819
 820                 .ep_type = ep_bulk_in,
 821                 .fifo_num = 2,
 822         },
 823
 824         .ep[3] = {
 825                 .ep = {
 826                         .name = "ep3in-int",
 827                         .ops = &s3c_ep_ops,
 828                         .maxpacket = EP_FIFO_SIZE,
 829                 },
 830                 .dev = &memory,
 831
 832                 .bEndpointAddress = USB_DIR_IN | 3,
 833                 .bmAttributes = USB_ENDPOINT_XFER_INT,
 834
 835                 .ep_type = ep_interrupt,
 836                 .fifo_num = 3,
 837         },
 838 };
 839
 840 /*
 841  *      probe - binds to the platform device
 842  */
 843
 844 int s3c_udc_probe(struct s3c_plat_otg_data *pdata)
 845 {
 846         struct s3c_udc *dev = &memory;
 847         int retval = 0, i;
 848
 849         debug("%s: %p\n", __func__, pdata);
 850
 851         dev->pdata = pdata;
 852
 853         phy = (struct s3c_usbotg_phy *)pdata->regs_phy;
 854         reg = (struct s3c_usbotg_reg *)pdata->regs_otg;
 855         usb_phy_ctrl = pdata->usb_phy_ctrl;
 856
 857         /* regs_otg = (void *)pdata->regs_otg; */
 858
 859         dev->gadget.is_dualspeed = 1;   /* Hack only*/
 860         dev->gadget.is_otg = 0;
 861         dev->gadget.is_a_peripheral = 0;
 862         dev->gadget.b_hnp_enable = 0;
 863         dev->gadget.a_hnp_support = 0;
 864         dev->gadget.a_alt_hnp_support = 0;
 865
 866         the_controller = dev;
 867
 868         for (i = 0; i < S3C_MAX_ENDPOINTS+1; i++) {
 869                 dev->dma_buf[i] = memalign(CONFIG_SYS_CACHELINE_SIZE,
 870                                            DMA_BUFFER_SIZE);
 871                 dev->dma_addr[i] = (dma_addr_t) dev->dma_buf[i];
 872                 invalidate_dcache_range((unsigned long) dev->dma_buf[i],
 873                                         (unsigned long) (dev->dma_buf[i]
 874                                                          + DMA_BUFFER_SIZE));
 875         }
 876         usb_ctrl = dev->dma_buf[0];
 877         usb_ctrl_dma_addr = dev->dma_addr[0];
 878
 879         udc_reinit(dev);
 880
 881         return retval;
 882 }
 883
 884 int usb_gadget_handle_interrupts()
 885 {
 886         u32 intr_status = readl(&reg->gintsts);
 887         u32 gintmsk = readl(&reg->gintmsk);
 888
 889         if (intr_status & gintmsk)
 890                 return s3c_udc_irq(1, (void *)the_controller);
 891         return 0;
 892 }