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 <linux/usb/gadget.h>
  41
  42 #include <asm/byteorder.h>
  43 #include <asm/unaligned.h>
  44 #include <asm/io.h>
  45
  46 #include <asm/mach-types.h>
  47 #include <asm/arch/gpio.h>
  48
  49 #include "regs-otg.h"
  50 #include <usb/s3c_udc.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 #if defined(DEBUG_S3C_UDC_SETUP) || defined(DEBUG_S3C_UDC_ISR)    \
  77         || defined(DEBUG_S3C_UDC_OUT_EP)
  78 static char *state_names[] = {
  79         "WAIT_FOR_SETUP",
  80         "DATA_STATE_XMIT",
  81         "DATA_STATE_NEED_ZLP",
  82         "WAIT_FOR_OUT_STATUS",
  83         "DATA_STATE_RECV",
  84         "WAIT_FOR_COMPLETE",
  85         "WAIT_FOR_OUT_COMPLETE",
  86         "WAIT_FOR_IN_COMPLETE",
  87         "WAIT_FOR_NULL_COMPLETE",
  88 };
  89 #endif
  90
  91 #define DRIVER_DESC "S3C HS USB OTG Device Driver, (c) Samsung Electronics"
  92 #define DRIVER_VERSION "15 March 2009"
  93
  94 struct s3c_udc  *the_controller;
  95
  96 static const char driver_name[] = "s3c-udc";
  97 static const char driver_desc[] = DRIVER_DESC;
  98 static const char ep0name[] = "ep0-control";
  99
 100 /* Max packet size*/
 101 static unsigned int ep0_fifo_size = 64;
 102 static unsigned int ep_fifo_size =  512;
 103 static unsigned int ep_fifo_size2 = 1024;
 104 static int reset_available = 1;
 105
 106 static struct usb_ctrlrequest *usb_ctrl;
 107 static dma_addr_t usb_ctrl_dma_addr;
 108
 109 /*
 110   Local declarations.
 111 */
 112 static int s3c_ep_enable(struct usb_ep *ep,
 113                          const struct usb_endpoint_descriptor *);
 114 static int s3c_ep_disable(struct usb_ep *ep);
 115 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 116                                              gfp_t gfp_flags);
 117 static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
 118
 119 static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
 120 static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
 121 static int s3c_fifo_status(struct usb_ep *ep);
 122 static void s3c_fifo_flush(struct usb_ep *ep);
 123 static void s3c_ep0_read(struct s3c_udc *dev);
 124 static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
 125 static void s3c_handle_ep0(struct s3c_udc *dev);
 126 static int s3c_ep0_write(struct s3c_udc *dev);
 127 static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
 128 static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
 129 static void stop_activity(struct s3c_udc *dev,
 130                           struct usb_gadget_driver *driver);
 131 static int udc_enable(struct s3c_udc *dev);
 132 static void udc_set_address(struct s3c_udc *dev, unsigned char address);
 133 static void reconfig_usbd(void);
 134 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
 135 static void nuke(struct s3c_ep *ep, int status);
 136 static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
 137 static void s3c_udc_set_nak(struct s3c_ep *ep);
 138
 139 static struct usb_ep_ops s3c_ep_ops = {
 140         .enable = s3c_ep_enable,
 141         .disable = s3c_ep_disable,
 142
 143         .alloc_request = s3c_alloc_request,
 144         .free_request = s3c_free_request,
 145
 146         .queue = s3c_queue,
 147         .dequeue = s3c_dequeue,
 148
 149         .set_halt = s3c_udc_set_halt,
 150         .fifo_status = s3c_fifo_status,
 151         .fifo_flush = s3c_fifo_flush,
 152 };
 153
 154 #define create_proc_files() do {} while (0)
 155 #define remove_proc_files() do {} while (0)
 156
 157 /***********************************************************/
 158
 159 void __iomem            *regs_otg;
 160 struct s3c_usbotg_reg *reg;
 161 struct s3c_usbotg_phy *phy;
 162 static unsigned int usb_phy_ctrl;
 163
 164 void otg_phy_init(struct s3c_udc *dev)
 165 {
 166         dev->pdata->phy_control(1);
 167
 168         /*USB PHY0 Enable */
 169         printf("USB PHY0 Enable\n");
 170
 171         /* Enable PHY */
 172         writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
 173
 174         if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
 175                 writel((readl(&phy->phypwr)
 176                         &~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
 177                         &~FORCE_SUSPEND_0), &phy->phypwr);
 178         else /* C110 GONI */
 179                 writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
 180                         &~FORCE_SUSPEND_0), &phy->phypwr);
 181
 182         writel((readl(&phy->phyclk) &~(ID_PULLUP0 | COMMON_ON_N0)) |
 183                CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
 184
 185         writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
 186                | PHY_SW_RST0, &phy->rstcon);
 187         udelay(10);
 188         writel(readl(&phy->rstcon)
 189                &~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
 190         udelay(10);
 191 }
 192
 193 void otg_phy_off(struct s3c_udc *dev)
 194 {
 195         /* reset controller just in case */
 196         writel(PHY_SW_RST0, &phy->rstcon);
 197         udelay(20);
 198         writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
 199         udelay(20);
 200
 201         writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
 202                | FORCE_SUSPEND_0, &phy->phypwr);
 203
 204         writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
 205
 206         writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
 207               &phy->phyclk);
 208
 209         udelay(10000);
 210
 211         dev->pdata->phy_control(0);
 212 }
 213
 214 /***********************************************************/
 215
 216 #include "s3c_udc_otg_xfer_dma.c"
 217
 218 /*
 219  *      udc_disable - disable USB device controller
 220  */
 221 static void udc_disable(struct s3c_udc *dev)
 222 {
 223         DEBUG_SETUP("%s: %p\n", __func__, dev);
 224
 225         udc_set_address(dev, 0);
 226
 227         dev->ep0state = WAIT_FOR_SETUP;
 228         dev->gadget.speed = USB_SPEED_UNKNOWN;
 229         dev->usb_address = 0;
 230
 231         otg_phy_off(dev);
 232 }
 233
 234 /*
 235  *      udc_reinit - initialize software state
 236  */
 237 static void udc_reinit(struct s3c_udc *dev)
 238 {
 239         unsigned int i;
 240
 241         DEBUG_SETUP("%s: %p\n", __func__, dev);
 242
 243         /* device/ep0 records init */
 244         INIT_LIST_HEAD(&dev->gadget.ep_list);
 245         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
 246         dev->ep0state = WAIT_FOR_SETUP;
 247
 248         /* basic endpoint records init */
 249         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 250                 struct s3c_ep *ep = &dev->ep[i];
 251
 252                 if (i != 0)
 253                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
 254
 255                 ep->desc = 0;
 256                 ep->stopped = 0;
 257                 INIT_LIST_HEAD(&ep->queue);
 258                 ep->pio_irqs = 0;
 259         }
 260
 261         /* the rest was statically initialized, and is read-only */
 262 }
 263
 264 #define BYTES2MAXP(x)   (x / 8)
 265 #define MAXP2BYTES(x)   (x * 8)
 266
 267 /* until it's enabled, this UDC should be completely invisible
 268  * to any USB host.
 269  */
 270 static int udc_enable(struct s3c_udc *dev)
 271 {
 272         DEBUG_SETUP("%s: %p\n", __func__, dev);
 273
 274         otg_phy_init(dev);
 275         reconfig_usbd();
 276
 277         DEBUG_SETUP("S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
 278                     readl(&reg->gintmsk));
 279
 280         dev->gadget.speed = USB_SPEED_UNKNOWN;
 281
 282         return 0;
 283 }
 284
 285 /*
 286   Register entry point for the peripheral controller driver.
 287 */
 288 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 289 {
 290         struct s3c_udc *dev = the_controller;
 291         int retval = 0;
 292         unsigned long flags;
 293
 294         DEBUG_SETUP("%s: %s\n", __func__, "no name");
 295
 296         if (!driver
 297             || (driver->speed != USB_SPEED_FULL
 298                 && driver->speed != USB_SPEED_HIGH)
 299             || !driver->bind || !driver->disconnect || !driver->setup)
 300                 return -EINVAL;
 301         if (!dev)
 302                 return -ENODEV;
 303         if (dev->driver)
 304                 return -EBUSY;
 305
 306         spin_lock_irqsave(&dev->lock, flags);
 307         /* first hook up the driver ... */
 308         dev->driver = driver;
 309         spin_unlock_irqrestore(&dev->lock, flags);
 310
 311         if (retval) { /* TODO */
 312                 printf("target device_add failed, error %d\n", retval);
 313                 return retval;
 314         }
 315
 316         retval = driver->bind(&dev->gadget);
 317         if (retval) {
 318                 DEBUG_SETUP("%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_SETUP("Registered gadget driver %s\n", dev->gadget.name);
 327         udc_enable(dev);
 328
 329         return 0;
 330 }
 331
 332 /*
 333  * Unregister entry point for the peripheral controller driver.
 334  */
 335 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 336 {
 337         struct s3c_udc *dev = the_controller;
 338         unsigned long flags;
 339
 340         if (!dev)
 341                 return -ENODEV;
 342         if (!driver || driver != dev->driver)
 343                 return -EINVAL;
 344
 345         spin_lock_irqsave(&dev->lock, flags);
 346         dev->driver = 0;
 347         stop_activity(dev, driver);
 348         spin_unlock_irqrestore(&dev->lock, flags);
 349
 350         driver->unbind(&dev->gadget);
 351
 352         disable_irq(IRQ_OTG);
 353
 354         udc_disable(dev);
 355         return 0;
 356 }
 357
 358 /*
 359  *      done - retire a request; caller blocked irqs
 360  */
 361 static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
 362 {
 363         unsigned int stopped = ep->stopped;
 364
 365         DEBUG("%s: %s %p, req = %p, stopped = %d\n",
 366               __func__, ep->ep.name, ep, &req->req, stopped);
 367
 368         list_del_init(&req->queue);
 369
 370         if (likely(req->req.status == -EINPROGRESS))
 371                 req->req.status = status;
 372         else
 373                 status = req->req.status;
 374
 375         if (status && status != -ESHUTDOWN) {
 376                 DEBUG("complete %s req %p stat %d len %u/%u\n",
 377                       ep->ep.name, &req->req, status,
 378                       req->req.actual, req->req.length);
 379         }
 380
 381         /* don't modify queue heads during completion callback */
 382         ep->stopped = 1;
 383
 384 #ifdef DEBUG_S3C_UDC
 385         printf("calling complete callback\n");
 386         {
 387                 int i, len = req->req.length;
 388
 389                 printf("pkt[%d] = ", req->req.length);
 390                 if (len > 64)
 391                         len = 64;
 392                 for (i = 0; i < len; i++) {
 393                         printf("%02x", ((u8 *)req->req.buf)[i]);
 394                         if ((i & 7) == 7)
 395                                 printf(" ");
 396                 }
 397                 printf("\n");
 398         }
 399 #endif
 400         spin_unlock(&ep->dev->lock);
 401         req->req.complete(&ep->ep, &req->req);
 402         spin_lock(&ep->dev->lock);
 403
 404         DEBUG("callback completed\n");
 405
 406         ep->stopped = stopped;
 407 }
 408
 409 /*
 410  *      nuke - dequeue ALL requests
 411  */
 412 static void nuke(struct s3c_ep *ep, int status)
 413 {
 414         struct s3c_request *req;
 415
 416         DEBUG("%s: %s %p\n", __func__, ep->ep.name, ep);
 417
 418         /* called with irqs blocked */
 419         while (!list_empty(&ep->queue)) {
 420                 req = list_entry(ep->queue.next, struct s3c_request, queue);
 421                 done(ep, req, status);
 422         }
 423 }
 424
 425 static void stop_activity(struct s3c_udc *dev,
 426                           struct usb_gadget_driver *driver)
 427 {
 428         int i;
 429
 430         /* don't disconnect drivers more than once */
 431         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
 432                 driver = 0;
 433         dev->gadget.speed = USB_SPEED_UNKNOWN;
 434
 435         /* prevent new request submissions, kill any outstanding requests  */
 436         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 437                 struct s3c_ep *ep = &dev->ep[i];
 438                 ep->stopped = 1;
 439                 nuke(ep, -ESHUTDOWN);
 440         }
 441
 442         /* report disconnect; the driver is already quiesced */
 443         if (driver) {
 444                 spin_unlock(&dev->lock);
 445                 driver->disconnect(&dev->gadget);
 446                 spin_lock(&dev->lock);
 447         }
 448
 449         /* re-init driver-visible data structures */
 450         udc_reinit(dev);
 451 }
 452
 453 static void reconfig_usbd(void)
 454 {
 455         /* 2. Soft-reset OTG Core and then unreset again. */
 456         int i;
 457         unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
 458
 459         DEBUG(2, "Reseting OTG controller\n");
 460
 461         writel(0<<15            /* PHY Low Power Clock sel*/
 462                 |1<<14          /* Non-Periodic TxFIFO Rewind Enable*/
 463                 |0x5<<10        /* Turnaround time*/
 464                 |0<<9 | 0<<8    /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
 465                                 /* 1:SRP enable] H1= 1,1*/
 466                 |0<<7           /* Ulpi DDR sel*/
 467                 |0<<6           /* 0: high speed utmi+, 1: full speed serial*/
 468                 |0<<4           /* 0: utmi+, 1:ulpi*/
 469                 |1<<3           /* phy i/f  0:8bit, 1:16bit*/
 470                 |0x7<<0,        /* HS/FS Timeout**/
 471                 &reg->gusbcfg);
 472
 473         /* 3. Put the OTG device core in the disconnected state.*/
 474         uTemp = readl(&reg->dctl);
 475         uTemp |= SOFT_DISCONNECT;
 476         writel(uTemp, &reg->dctl);
 477
 478         udelay(20);
 479
 480         /* 4. Make the OTG device core exit from the disconnected state.*/
 481         uTemp = readl(&reg->dctl);
 482         uTemp = uTemp & ~SOFT_DISCONNECT;
 483         writel(uTemp, &reg->dctl);
 484
 485         /* 5. Configure OTG Core to initial settings of device mode.*/
 486         /* [][1: full speed(30Mhz) 0:high speed]*/
 487         writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, &reg->dcfg);
 488
 489         mdelay(1);
 490
 491         /* 6. Unmask the core interrupts*/
 492         writel(GINTMSK_INIT, &reg->gintmsk);
 493
 494         /* 7. Set NAK bit of EP0, EP1, EP2*/
 495         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[EP0_CON].doepctl);
 496         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[EP0_CON].diepctl);
 497
 498         for (i = 1; i < S3C_MAX_ENDPOINTS; i++) {
 499                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[i].doepctl);
 500                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[i].diepctl);
 501         }
 502
 503         /* 8. Unmask EPO interrupts*/
 504         writel(((1 << EP0_CON) << DAINT_OUT_BIT)
 505                | (1 << EP0_CON), &reg->daintmsk);
 506
 507         /* 9. Unmask device OUT EP common interrupts*/
 508         writel(DOEPMSK_INIT, &reg->doepmsk);
 509
 510         /* 10. Unmask device IN EP common interrupts*/
 511         writel(DIEPMSK_INIT, &reg->diepmsk);
 512
 513         /* 11. Set Rx FIFO Size (in 32-bit words) */
 514         writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
 515
 516         /* 12. Set Non Periodic Tx FIFO Size */
 517         writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
 518                &reg->gnptxfsiz);
 519
 520         for (i = 1; i < S3C_MAX_HW_ENDPOINTS; i++)
 521                 writel((PTX_FIFO_SIZE >> 2) << 16 |
 522                        ((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
 523                          PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
 524                        &reg->dieptxf[i-1]);
 525
 526         /* Flush the RX FIFO */
 527         writel(RX_FIFO_FLUSH, &reg->grstctl);
 528         while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
 529                 DEBUG("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 530
 531         /* Flush all the Tx FIFO's */
 532         writel(TX_FIFO_FLUSH_ALL, &reg->grstctl);
 533         writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, &reg->grstctl);
 534         while (readl(&reg->grstctl) & TX_FIFO_FLUSH)
 535                 DEBUG("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 536
 537         /* 13. Clear NAK bit of EP0, EP1, EP2*/
 538         /* For Slave mode*/
 539         /* EP0: Control OUT */
 540         writel(DEPCTL_EPDIS | DEPCTL_CNAK,
 541                &reg->out_endp[EP0_CON].doepctl);
 542
 543         /* 14. Initialize OTG Link Core.*/
 544         writel(GAHBCFG_INIT, &reg->gahbcfg);
 545 }
 546
 547 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
 548 {
 549         unsigned int ep_ctrl;
 550         int i;
 551
 552         if (speed == USB_SPEED_HIGH) {
 553                 ep0_fifo_size = 64;
 554                 ep_fifo_size = 512;
 555                 ep_fifo_size2 = 1024;
 556                 dev->gadget.speed = USB_SPEED_HIGH;
 557         } else {
 558                 ep0_fifo_size = 64;
 559                 ep_fifo_size = 64;
 560                 ep_fifo_size2 = 64;
 561                 dev->gadget.speed = USB_SPEED_FULL;
 562         }
 563
 564         dev->ep[0].ep.maxpacket = ep0_fifo_size;
 565         for (i = 1; i < S3C_MAX_ENDPOINTS; i++)
 566                 dev->ep[i].ep.maxpacket = ep_fifo_size;
 567
 568         /* EP0 - Control IN (64 bytes)*/
 569         ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
 570         writel(ep_ctrl|(0<<0), &reg->in_endp[EP0_CON].diepctl);
 571
 572         /* EP0 - Control OUT (64 bytes)*/
 573         ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
 574         writel(ep_ctrl|(0<<0), &reg->out_endp[EP0_CON].doepctl);
 575 }
 576
 577 static int s3c_ep_enable(struct usb_ep *_ep,
 578                          const struct usb_endpoint_descriptor *desc)
 579 {
 580         struct s3c_ep *ep;
 581         struct s3c_udc *dev;
 582         unsigned long flags;
 583
 584         DEBUG("%s: %p\n", __func__, _ep);
 585
 586         ep = container_of(_ep, struct s3c_ep, ep);
 587         if (!_ep || !desc || ep->desc || _ep->name == ep0name
 588             || desc->bDescriptorType != USB_DT_ENDPOINT
 589             || ep->bEndpointAddress != desc->bEndpointAddress
 590             || ep_maxpacket(ep) <
 591             le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
 592
 593                 DEBUG("%s: bad ep or descriptor\n", __func__);
 594                 return -EINVAL;
 595         }
 596
 597         /* xfer types must match, except that interrupt ~= bulk */
 598         if (ep->bmAttributes != desc->bmAttributes
 599             && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
 600             && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
 601
 602                 DEBUG("%s: %s type mismatch\n", __func__, _ep->name);
 603                 return -EINVAL;
 604         }
 605
 606         /* hardware _could_ do smaller, but driver doesn't */
 607         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
 608              && le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) !=
 609              ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
 610
 611                 DEBUG("%s: bad %s maxpacket\n", __func__, _ep->name);
 612                 return -ERANGE;
 613         }
 614
 615         dev = ep->dev;
 616         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
 617
 618                 DEBUG("%s: bogus device state\n", __func__);
 619                 return -ESHUTDOWN;
 620         }
 621
 622         ep->stopped = 0;
 623         ep->desc = desc;
 624         ep->pio_irqs = 0;
 625         ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
 626
 627         /* Reset halt state */
 628         s3c_udc_set_nak(ep);
 629         s3c_udc_set_halt(_ep, 0);
 630
 631         spin_lock_irqsave(&ep->dev->lock, flags);
 632         s3c_udc_ep_activate(ep);
 633         spin_unlock_irqrestore(&ep->dev->lock, flags);
 634
 635         DEBUG("%s: enabled %s, stopped = %d, maxpacket = %d\n",
 636               __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
 637         return 0;
 638 }
 639
 640 /*
 641  * Disable EP
 642  */
 643 static int s3c_ep_disable(struct usb_ep *_ep)
 644 {
 645         struct s3c_ep *ep;
 646         unsigned long flags;
 647
 648         DEBUG("%s: %p\n", __func__, _ep);
 649
 650         ep = container_of(_ep, struct s3c_ep, ep);
 651         if (!_ep || !ep->desc) {
 652                 DEBUG("%s: %s not enabled\n", __func__,
 653                       _ep ? ep->ep.name : NULL);
 654                 return -EINVAL;
 655         }
 656
 657         spin_lock_irqsave(&ep->dev->lock, flags);
 658
 659         /* Nuke all pending requests */
 660         nuke(ep, -ESHUTDOWN);
 661
 662         ep->desc = 0;
 663         ep->stopped = 1;
 664
 665         spin_unlock_irqrestore(&ep->dev->lock, flags);
 666
 667         DEBUG("%s: disabled %s\n", __func__, _ep->name);
 668         return 0;
 669 }
 670
 671 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 672                                              gfp_t gfp_flags)
 673 {
 674         struct s3c_request *req;
 675
 676         DEBUG("%s: %s %p\n", __func__, ep->name, ep);
 677
 678         req = kmalloc(sizeof *req, gfp_flags);
 679         if (!req)
 680                 return 0;
 681
 682         memset(req, 0, sizeof *req);
 683         INIT_LIST_HEAD(&req->queue);
 684
 685         return &req->req;
 686 }
 687
 688 static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
 689 {
 690         struct s3c_request *req;
 691
 692         DEBUG("%s: %p\n", __func__, ep);
 693
 694         req = container_of(_req, struct s3c_request, req);
 695         WARN_ON(!list_empty(&req->queue));
 696         kfree(req);
 697 }
 698
 699 /* dequeue JUST ONE request */
 700 static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 701 {
 702         struct s3c_ep *ep;
 703         struct s3c_request *req;
 704         unsigned long flags;
 705
 706         DEBUG("%s: %p\n", __func__, _ep);
 707
 708         ep = container_of(_ep, struct s3c_ep, ep);
 709         if (!_ep || ep->ep.name == ep0name)
 710                 return -EINVAL;
 711
 712         spin_lock_irqsave(&ep->dev->lock, flags);
 713
 714         /* make sure it's actually queued on this endpoint */
 715         list_for_each_entry(req, &ep->queue, queue) {
 716                 if (&req->req == _req)
 717                         break;
 718         }
 719         if (&req->req != _req) {
 720                 spin_unlock_irqrestore(&ep->dev->lock, flags);
 721                 return -EINVAL;
 722         }
 723
 724         done(ep, req, -ECONNRESET);
 725
 726         spin_unlock_irqrestore(&ep->dev->lock, flags);
 727         return 0;
 728 }
 729
 730 /*
 731  * Return bytes in EP FIFO
 732  */
 733 static int s3c_fifo_status(struct usb_ep *_ep)
 734 {
 735         int count = 0;
 736         struct s3c_ep *ep;
 737
 738         ep = container_of(_ep, struct s3c_ep, ep);
 739         if (!_ep) {
 740                 DEBUG("%s: bad ep\n", __func__);
 741                 return -ENODEV;
 742         }
 743
 744         DEBUG("%s: %d\n", __func__, ep_index(ep));
 745
 746         /* LPD can't report unclaimed bytes from IN fifos */
 747         if (ep_is_in(ep))
 748                 return -EOPNOTSUPP;
 749
 750         return count;
 751 }
 752
 753 /*
 754  * Flush EP FIFO
 755  */
 756 static void s3c_fifo_flush(struct usb_ep *_ep)
 757 {
 758         struct s3c_ep *ep;
 759
 760         ep = container_of(_ep, struct s3c_ep, ep);
 761         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
 762                 DEBUG("%s: bad ep\n", __func__);
 763                 return;
 764         }
 765
 766         DEBUG("%s: %d\n", __func__, ep_index(ep));
 767 }
 768
 769 static const struct usb_gadget_ops s3c_udc_ops = {
 770         /* current versions must always be self-powered */
 771 };
 772
 773 static struct s3c_udc memory = {
 774         .usb_address = 0,
 775         .gadget = {
 776                 .ops = &s3c_udc_ops,
 777                 .ep0 = &memory.ep[0].ep,
 778                 .name = driver_name,
 779         },
 780
 781         /* control endpoint */
 782         .ep[0] = {
 783                 .ep = {
 784                         .name = ep0name,
 785                         .ops = &s3c_ep_ops,
 786                         .maxpacket = EP0_FIFO_SIZE,
 787                 },
 788                 .dev = &memory,
 789
 790                 .bEndpointAddress = 0,
 791                 .bmAttributes = 0,
 792
 793                 .ep_type = ep_control,
 794         },
 795
 796         /* first group of endpoints */
 797         .ep[1] = {
 798                 .ep = {
 799                         .name = "ep1in-bulk",
 800                         .ops = &s3c_ep_ops,
 801                         .maxpacket = EP_FIFO_SIZE,
 802                 },
 803                 .dev = &memory,
 804
 805                 .bEndpointAddress = USB_DIR_IN | 1,
 806                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 807
 808                 .ep_type = ep_bulk_out,
 809                 .fifo_num = 1,
 810         },
 811
 812         .ep[2] = {
 813                 .ep = {
 814                         .name = "ep2out-bulk",
 815                         .ops = &s3c_ep_ops,
 816                         .maxpacket = EP_FIFO_SIZE,
 817                 },
 818                 .dev = &memory,
 819
 820                 .bEndpointAddress = USB_DIR_OUT | 2,
 821                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 822
 823                 .ep_type = ep_bulk_in,
 824                 .fifo_num = 2,
 825         },
 826
 827         .ep[3] = {
 828                 .ep = {
 829                         .name = "ep3in-int",
 830                         .ops = &s3c_ep_ops,
 831                         .maxpacket = EP_FIFO_SIZE,
 832                 },
 833                 .dev = &memory,
 834
 835                 .bEndpointAddress = USB_DIR_IN | 3,
 836                 .bmAttributes = USB_ENDPOINT_XFER_INT,
 837
 838                 .ep_type = ep_interrupt,
 839                 .fifo_num = 3,
 840         },
 841 };
 842
 843 /*
 844  *      probe - binds to the platform device
 845  */
 846
 847 int s3c_udc_probe(struct s3c_plat_otg_data *pdata)
 848 {
 849         struct s3c_udc *dev = &memory;
 850         int retval = 0, i;
 851
 852         DEBUG("%s: %p\n", __func__, pdata);
 853
 854         dev->pdata = pdata;
 855
 856         phy = (struct s3c_usbotg_phy *)pdata->regs_phy;
 857         reg = (struct s3c_usbotg_reg *)pdata->regs_otg;
 858         usb_phy_ctrl = pdata->usb_phy_ctrl;
 859
 860         /* regs_otg = (void *)pdata->regs_otg; */
 861
 862         dev->gadget.is_dualspeed = 1;   /* Hack only*/
 863         dev->gadget.is_otg = 0;
 864         dev->gadget.is_a_peripheral = 0;
 865         dev->gadget.b_hnp_enable = 0;
 866         dev->gadget.a_hnp_support = 0;
 867         dev->gadget.a_alt_hnp_support = 0;
 868
 869         the_controller = dev;
 870
 871         for (i = 0; i < S3C_MAX_ENDPOINTS+1; i++) {
 872                 dev->dma_buf[i] = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL);
 873                 dev->dma_addr[i] = (dma_addr_t) dev->dma_buf[i];
 874                 invalidate_dcache_range((unsigned long) dev->dma_buf[i],
 875                                         (unsigned long) (dev->dma_buf[i]
 876                                                          + DMA_BUFFER_SIZE));
 877         }
 878         usb_ctrl = dev->dma_buf[0];
 879         usb_ctrl_dma_addr = dev->dma_addr[0];
 880
 881         udc_reinit(dev);
 882
 883         return retval;
 884 }
 885
 886 int usb_gadget_handle_interrupts()
 887 {
 888         u32 intr_status = readl(&reg->gintsts);
 889         u32 gintmsk = readl(&reg->gintmsk);
 890
 891         if (intr_status & gintmsk)
 892                 return s3c_udc_irq(1, (void *)the_controller);
 893         return 0;
 894 }