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 #undef DEBUG
  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 #define DEBUG_SETUP 0
  58 #define DEBUG_EP0 0
  59 #define DEBUG_ISR 0
  60 #define DEBUG_OUT_EP 0
  61 #define DEBUG_IN_EP 0
  62
  63 #include <usb/s3c_udc.h>
  64
  65 #define EP0_CON         0
  66 #define EP_MASK         0xF
  67
  68 static char *state_names[] = {
  69         "WAIT_FOR_SETUP",
  70         "DATA_STATE_XMIT",
  71         "DATA_STATE_NEED_ZLP",
  72         "WAIT_FOR_OUT_STATUS",
  73         "DATA_STATE_RECV",
  74         "WAIT_FOR_COMPLETE",
  75         "WAIT_FOR_OUT_COMPLETE",
  76         "WAIT_FOR_IN_COMPLETE",
  77         "WAIT_FOR_NULL_COMPLETE",
  78 };
  79
  80 #define DRIVER_DESC "S3C HS USB OTG Device Driver, (c) Samsung Electronics"
  81 #define DRIVER_VERSION "15 March 2009"
  82
  83 struct s3c_udc  *the_controller;
  84
  85 static const char driver_name[] = "s3c-udc";
  86 static const char driver_desc[] = DRIVER_DESC;
  87 static const char ep0name[] = "ep0-control";
  88
  89 /* Max packet size*/
  90 static unsigned int ep0_fifo_size = 64;
  91 static unsigned int ep_fifo_size =  512;
  92 static unsigned int ep_fifo_size2 = 1024;
  93 static int reset_available = 1;
  94
  95 static struct usb_ctrlrequest *usb_ctrl;
  96 static dma_addr_t usb_ctrl_dma_addr;
  97
  98 /*
  99   Local declarations.
 100 */
 101 static int s3c_ep_enable(struct usb_ep *ep,
 102                          const struct usb_endpoint_descriptor *);
 103 static int s3c_ep_disable(struct usb_ep *ep);
 104 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 105                                              gfp_t gfp_flags);
 106 static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
 107
 108 static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
 109 static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
 110 static int s3c_fifo_status(struct usb_ep *ep);
 111 static void s3c_fifo_flush(struct usb_ep *ep);
 112 static void s3c_ep0_read(struct s3c_udc *dev);
 113 static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
 114 static void s3c_handle_ep0(struct s3c_udc *dev);
 115 static int s3c_ep0_write(struct s3c_udc *dev);
 116 static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
 117 static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
 118 static void stop_activity(struct s3c_udc *dev,
 119                           struct usb_gadget_driver *driver);
 120 static int udc_enable(struct s3c_udc *dev);
 121 static void udc_set_address(struct s3c_udc *dev, unsigned char address);
 122 static void reconfig_usbd(void);
 123 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
 124 static void nuke(struct s3c_ep *ep, int status);
 125 static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
 126 static void s3c_udc_set_nak(struct s3c_ep *ep);
 127
 128 void set_udc_gadget_private_data(void *p)
 129 {
 130         debug_cond(DEBUG_SETUP != 0,
 131                    "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
 132                    the_controller, p);
 133         the_controller->gadget.dev.device_data = p;
 134 }
 135
 136 void *get_udc_gadget_private_data(struct usb_gadget *gadget)
 137 {
 138         return gadget->dev.device_data;
 139 }
 140
 141 static struct usb_ep_ops s3c_ep_ops = {
 142         .enable = s3c_ep_enable,
 143         .disable = s3c_ep_disable,
 144
 145         .alloc_request = s3c_alloc_request,
 146         .free_request = s3c_free_request,
 147
 148         .queue = s3c_queue,
 149         .dequeue = s3c_dequeue,
 150
 151         .set_halt = s3c_udc_set_halt,
 152         .fifo_status = s3c_fifo_status,
 153         .fifo_flush = s3c_fifo_flush,
 154 };
 155
 156 #define create_proc_files() do {} while (0)
 157 #define remove_proc_files() do {} while (0)
 158
 159 /***********************************************************/
 160
 161 void __iomem            *regs_otg;
 162 struct s3c_usbotg_reg *reg;
 163 struct s3c_usbotg_phy *phy;
 164 static unsigned int usb_phy_ctrl;
 165
 166 void otg_phy_init(struct s3c_udc *dev)
 167 {
 168         dev->pdata->phy_control(1);
 169
 170         /*USB PHY0 Enable */
 171         printf("USB PHY0 Enable\n");
 172
 173         /* Enable PHY */
 174         writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
 175
 176         if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
 177                 writel((readl(&phy->phypwr)
 178                         &~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
 179                         &~FORCE_SUSPEND_0), &phy->phypwr);
 180         else /* C110 GONI */
 181                 writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
 182                         &~FORCE_SUSPEND_0), &phy->phypwr);
 183
 184         writel((readl(&phy->phyclk) &~(ID_PULLUP0 | COMMON_ON_N0)) |
 185                CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
 186
 187         writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
 188                | PHY_SW_RST0, &phy->rstcon);
 189         udelay(10);
 190         writel(readl(&phy->rstcon)
 191                &~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
 192         udelay(10);
 193 }
 194
 195 void otg_phy_off(struct s3c_udc *dev)
 196 {
 197         /* reset controller just in case */
 198         writel(PHY_SW_RST0, &phy->rstcon);
 199         udelay(20);
 200         writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
 201         udelay(20);
 202
 203         writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
 204                | FORCE_SUSPEND_0, &phy->phypwr);
 205
 206         writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
 207
 208         writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
 209               &phy->phyclk);
 210
 211         udelay(10000);
 212
 213         dev->pdata->phy_control(0);
 214 }
 215
 216 /***********************************************************/
 217
 218 #include "s3c_udc_otg_xfer_dma.c"
 219
 220 /*
 221  *      udc_disable - disable USB device controller
 222  */
 223 static void udc_disable(struct s3c_udc *dev)
 224 {
 225         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 226
 227         udc_set_address(dev, 0);
 228
 229         dev->ep0state = WAIT_FOR_SETUP;
 230         dev->gadget.speed = USB_SPEED_UNKNOWN;
 231         dev->usb_address = 0;
 232
 233         otg_phy_off(dev);
 234 }
 235
 236 /*
 237  *      udc_reinit - initialize software state
 238  */
 239 static void udc_reinit(struct s3c_udc *dev)
 240 {
 241         unsigned int i;
 242
 243         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 244
 245         /* device/ep0 records init */
 246         INIT_LIST_HEAD(&dev->gadget.ep_list);
 247         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
 248         dev->ep0state = WAIT_FOR_SETUP;
 249
 250         /* basic endpoint records init */
 251         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 252                 struct s3c_ep *ep = &dev->ep[i];
 253
 254                 if (i != 0)
 255                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
 256
 257                 ep->desc = 0;
 258                 ep->stopped = 0;
 259                 INIT_LIST_HEAD(&ep->queue);
 260                 ep->pio_irqs = 0;
 261         }
 262
 263         /* the rest was statically initialized, and is read-only */
 264 }
 265
 266 #define BYTES2MAXP(x)   (x / 8)
 267 #define MAXP2BYTES(x)   (x * 8)
 268
 269 /* until it's enabled, this UDC should be completely invisible
 270  * to any USB host.
 271  */
 272 static int udc_enable(struct s3c_udc *dev)
 273 {
 274         debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
 275
 276         otg_phy_init(dev);
 277         reconfig_usbd();
 278
 279         debug_cond(DEBUG_SETUP != 0,
 280                    "S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
 281                     readl(&reg->gintmsk));
 282
 283         dev->gadget.speed = USB_SPEED_UNKNOWN;
 284
 285         return 0;
 286 }
 287
 288 /*
 289   Register entry point for the peripheral controller driver.
 290 */
 291 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 292 {
 293         struct s3c_udc *dev = the_controller;
 294         int retval = 0;
 295         unsigned long flags;
 296
 297         debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
 298
 299         if (!driver
 300             || (driver->speed != USB_SPEED_FULL
 301                 && driver->speed != USB_SPEED_HIGH)
 302             || !driver->bind || !driver->disconnect || !driver->setup)
 303                 return -EINVAL;
 304         if (!dev)
 305                 return -ENODEV;
 306         if (dev->driver)
 307                 return -EBUSY;
 308
 309         spin_lock_irqsave(&dev->lock, flags);
 310         /* first hook up the driver ... */
 311         dev->driver = driver;
 312         spin_unlock_irqrestore(&dev->lock, flags);
 313
 314         if (retval) { /* TODO */
 315                 printf("target device_add failed, error %d\n", retval);
 316                 return retval;
 317         }
 318
 319         retval = driver->bind(&dev->gadget);
 320         if (retval) {
 321                 debug_cond(DEBUG_SETUP != 0,
 322                            "%s: bind to driver --> error %d\n",
 323                             dev->gadget.name, retval);
 324                 dev->driver = 0;
 325                 return retval;
 326         }
 327
 328         enable_irq(IRQ_OTG);
 329
 330         debug_cond(DEBUG_SETUP != 0,
 331                    "Registered gadget driver %s\n", dev->gadget.name);
 332         udc_enable(dev);
 333
 334         return 0;
 335 }
 336
 337 /*
 338  * Unregister entry point for the peripheral controller driver.
 339  */
 340 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 341 {
 342         struct s3c_udc *dev = the_controller;
 343         unsigned long flags;
 344
 345         if (!dev)
 346                 return -ENODEV;
 347         if (!driver || driver != dev->driver)
 348                 return -EINVAL;
 349
 350         spin_lock_irqsave(&dev->lock, flags);
 351         dev->driver = 0;
 352         stop_activity(dev, driver);
 353         spin_unlock_irqrestore(&dev->lock, flags);
 354
 355         driver->unbind(&dev->gadget);
 356
 357         disable_irq(IRQ_OTG);
 358
 359         udc_disable(dev);
 360         return 0;
 361 }
 362
 363 /*
 364  *      done - retire a request; caller blocked irqs
 365  */
 366 static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
 367 {
 368         unsigned int stopped = ep->stopped;
 369
 370         debug("%s: %s %p, req = %p, stopped = %d\n",
 371               __func__, ep->ep.name, ep, &req->req, stopped);
 372
 373         list_del_init(&req->queue);
 374
 375         if (likely(req->req.status == -EINPROGRESS))
 376                 req->req.status = status;
 377         else
 378                 status = req->req.status;
 379
 380         if (status && status != -ESHUTDOWN) {
 381                 debug("complete %s req %p stat %d len %u/%u\n",
 382                       ep->ep.name, &req->req, status,
 383                       req->req.actual, req->req.length);
 384         }
 385
 386         /* don't modify queue heads during completion callback */
 387         ep->stopped = 1;
 388
 389 #ifdef DEBUG
 390         printf("calling complete callback\n");
 391         {
 392                 int i, len = req->req.length;
 393
 394                 printf("pkt[%d] = ", req->req.length);
 395                 if (len > 64)
 396                         len = 64;
 397                 for (i = 0; i < len; i++) {
 398                         printf("%02x", ((u8 *)req->req.buf)[i]);
 399                         if ((i & 7) == 7)
 400                                 printf(" ");
 401                 }
 402                 printf("\n");
 403         }
 404 #endif
 405         spin_unlock(&ep->dev->lock);
 406         req->req.complete(&ep->ep, &req->req);
 407         spin_lock(&ep->dev->lock);
 408
 409         debug("callback completed\n");
 410
 411         ep->stopped = stopped;
 412 }
 413
 414 /*
 415  *      nuke - dequeue ALL requests
 416  */
 417 static void nuke(struct s3c_ep *ep, int status)
 418 {
 419         struct s3c_request *req;
 420
 421         debug("%s: %s %p\n", __func__, ep->ep.name, ep);
 422
 423         /* called with irqs blocked */
 424         while (!list_empty(&ep->queue)) {
 425                 req = list_entry(ep->queue.next, struct s3c_request, queue);
 426                 done(ep, req, status);
 427         }
 428 }
 429
 430 static void stop_activity(struct s3c_udc *dev,
 431                           struct usb_gadget_driver *driver)
 432 {
 433         int i;
 434
 435         /* don't disconnect drivers more than once */
 436         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
 437                 driver = 0;
 438         dev->gadget.speed = USB_SPEED_UNKNOWN;
 439
 440         /* prevent new request submissions, kill any outstanding requests  */
 441         for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
 442                 struct s3c_ep *ep = &dev->ep[i];
 443                 ep->stopped = 1;
 444                 nuke(ep, -ESHUTDOWN);
 445         }
 446
 447         /* report disconnect; the driver is already quiesced */
 448         if (driver) {
 449                 spin_unlock(&dev->lock);
 450                 driver->disconnect(&dev->gadget);
 451                 spin_lock(&dev->lock);
 452         }
 453
 454         /* re-init driver-visible data structures */
 455         udc_reinit(dev);
 456 }
 457
 458 static void reconfig_usbd(void)
 459 {
 460         /* 2. Soft-reset OTG Core and then unreset again. */
 461         int i;
 462         unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
 463
 464         debug("Reseting OTG controller\n");
 465
 466         writel(0<<15            /* PHY Low Power Clock sel*/
 467                 |1<<14          /* Non-Periodic TxFIFO Rewind Enable*/
 468                 |0x5<<10        /* Turnaround time*/
 469                 |0<<9 | 0<<8    /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
 470                                 /* 1:SRP enable] H1= 1,1*/
 471                 |0<<7           /* Ulpi DDR sel*/
 472                 |0<<6           /* 0: high speed utmi+, 1: full speed serial*/
 473                 |0<<4           /* 0: utmi+, 1:ulpi*/
 474                 |1<<3           /* phy i/f  0:8bit, 1:16bit*/
 475                 |0x7<<0,        /* HS/FS Timeout**/
 476                 &reg->gusbcfg);
 477
 478         /* 3. Put the OTG device core in the disconnected state.*/
 479         uTemp = readl(&reg->dctl);
 480         uTemp |= SOFT_DISCONNECT;
 481         writel(uTemp, &reg->dctl);
 482
 483         udelay(20);
 484
 485         /* 4. Make the OTG device core exit from the disconnected state.*/
 486         uTemp = readl(&reg->dctl);
 487         uTemp = uTemp & ~SOFT_DISCONNECT;
 488         writel(uTemp, &reg->dctl);
 489
 490         /* 5. Configure OTG Core to initial settings of device mode.*/
 491         /* [][1: full speed(30Mhz) 0:high speed]*/
 492         writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, &reg->dcfg);
 493
 494         mdelay(1);
 495
 496         /* 6. Unmask the core interrupts*/
 497         writel(GINTMSK_INIT, &reg->gintmsk);
 498
 499         /* 7. Set NAK bit of EP0, EP1, EP2*/
 500         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[EP0_CON].doepctl);
 501         writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[EP0_CON].diepctl);
 502
 503         for (i = 1; i < S3C_MAX_ENDPOINTS; i++) {
 504                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[i].doepctl);
 505                 writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[i].diepctl);
 506         }
 507
 508         /* 8. Unmask EPO interrupts*/
 509         writel(((1 << EP0_CON) << DAINT_OUT_BIT)
 510                | (1 << EP0_CON), &reg->daintmsk);
 511
 512         /* 9. Unmask device OUT EP common interrupts*/
 513         writel(DOEPMSK_INIT, &reg->doepmsk);
 514
 515         /* 10. Unmask device IN EP common interrupts*/
 516         writel(DIEPMSK_INIT, &reg->diepmsk);
 517
 518         /* 11. Set Rx FIFO Size (in 32-bit words) */
 519         writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
 520
 521         /* 12. Set Non Periodic Tx FIFO Size */
 522         writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
 523                &reg->gnptxfsiz);
 524
 525         for (i = 1; i < S3C_MAX_HW_ENDPOINTS; i++)
 526                 writel((PTX_FIFO_SIZE >> 2) << 16 |
 527                        ((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
 528                          PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
 529                        &reg->dieptxf[i-1]);
 530
 531         /* Flush the RX FIFO */
 532         writel(RX_FIFO_FLUSH, &reg->grstctl);
 533         while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
 534                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 535
 536         /* Flush all the Tx FIFO's */
 537         writel(TX_FIFO_FLUSH_ALL, &reg->grstctl);
 538         writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, &reg->grstctl);
 539         while (readl(&reg->grstctl) & TX_FIFO_FLUSH)
 540                 debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
 541
 542         /* 13. Clear NAK bit of EP0, EP1, EP2*/
 543         /* For Slave mode*/
 544         /* EP0: Control OUT */
 545         writel(DEPCTL_EPDIS | DEPCTL_CNAK,
 546                &reg->out_endp[EP0_CON].doepctl);
 547
 548         /* 14. Initialize OTG Link Core.*/
 549         writel(GAHBCFG_INIT, &reg->gahbcfg);
 550 }
 551
 552 static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
 553 {
 554         unsigned int ep_ctrl;
 555         int i;
 556
 557         if (speed == USB_SPEED_HIGH) {
 558                 ep0_fifo_size = 64;
 559                 ep_fifo_size = 512;
 560                 ep_fifo_size2 = 1024;
 561                 dev->gadget.speed = USB_SPEED_HIGH;
 562         } else {
 563                 ep0_fifo_size = 64;
 564                 ep_fifo_size = 64;
 565                 ep_fifo_size2 = 64;
 566                 dev->gadget.speed = USB_SPEED_FULL;
 567         }
 568
 569         dev->ep[0].ep.maxpacket = ep0_fifo_size;
 570         for (i = 1; i < S3C_MAX_ENDPOINTS; i++)
 571                 dev->ep[i].ep.maxpacket = ep_fifo_size;
 572
 573         /* EP0 - Control IN (64 bytes)*/
 574         ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
 575         writel(ep_ctrl|(0<<0), &reg->in_endp[EP0_CON].diepctl);
 576
 577         /* EP0 - Control OUT (64 bytes)*/
 578         ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
 579         writel(ep_ctrl|(0<<0), &reg->out_endp[EP0_CON].doepctl);
 580 }
 581
 582 static int s3c_ep_enable(struct usb_ep *_ep,
 583                          const struct usb_endpoint_descriptor *desc)
 584 {
 585         struct s3c_ep *ep;
 586         struct s3c_udc *dev;
 587         unsigned long flags;
 588
 589         debug("%s: %p\n", __func__, _ep);
 590
 591         ep = container_of(_ep, struct s3c_ep, ep);
 592         if (!_ep || !desc || ep->desc || _ep->name == ep0name
 593             || desc->bDescriptorType != USB_DT_ENDPOINT
 594             || ep->bEndpointAddress != desc->bEndpointAddress
 595             || ep_maxpacket(ep) <
 596             le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
 597
 598                 debug("%s: bad ep or descriptor\n", __func__);
 599                 return -EINVAL;
 600         }
 601
 602         /* xfer types must match, except that interrupt ~= bulk */
 603         if (ep->bmAttributes != desc->bmAttributes
 604             && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
 605             && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
 606
 607                 debug("%s: %s type mismatch\n", __func__, _ep->name);
 608                 return -EINVAL;
 609         }
 610
 611         /* hardware _could_ do smaller, but driver doesn't */
 612         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
 613              && le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) !=
 614              ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
 615
 616                 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
 617                 return -ERANGE;
 618         }
 619
 620         dev = ep->dev;
 621         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
 622
 623                 debug("%s: bogus device state\n", __func__);
 624                 return -ESHUTDOWN;
 625         }
 626
 627         ep->stopped = 0;
 628         ep->desc = desc;
 629         ep->pio_irqs = 0;
 630         ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
 631
 632         /* Reset halt state */
 633         s3c_udc_set_nak(ep);
 634         s3c_udc_set_halt(_ep, 0);
 635
 636         spin_lock_irqsave(&ep->dev->lock, flags);
 637         s3c_udc_ep_activate(ep);
 638         spin_unlock_irqrestore(&ep->dev->lock, flags);
 639
 640         debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
 641               __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
 642         return 0;
 643 }
 644
 645 /*
 646  * Disable EP
 647  */
 648 static int s3c_ep_disable(struct usb_ep *_ep)
 649 {
 650         struct s3c_ep *ep;
 651         unsigned long flags;
 652
 653         debug("%s: %p\n", __func__, _ep);
 654
 655         ep = container_of(_ep, struct s3c_ep, ep);
 656         if (!_ep || !ep->desc) {
 657                 debug("%s: %s not enabled\n", __func__,
 658                       _ep ? ep->ep.name : NULL);
 659                 return -EINVAL;
 660         }
 661
 662         spin_lock_irqsave(&ep->dev->lock, flags);
 663
 664         /* Nuke all pending requests */
 665         nuke(ep, -ESHUTDOWN);
 666
 667         ep->desc = 0;
 668         ep->stopped = 1;
 669
 670         spin_unlock_irqrestore(&ep->dev->lock, flags);
 671
 672         debug("%s: disabled %s\n", __func__, _ep->name);
 673         return 0;
 674 }
 675
 676 static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
 677                                              gfp_t gfp_flags)
 678 {
 679         struct s3c_request *req;
 680
 681         debug("%s: %s %p\n", __func__, ep->name, ep);
 682
 683         req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
 684         if (!req)
 685                 return 0;
 686
 687         memset(req, 0, sizeof *req);
 688         INIT_LIST_HEAD(&req->queue);
 689
 690         return &req->req;
 691 }
 692
 693 static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
 694 {
 695         struct s3c_request *req;
 696
 697         debug("%s: %p\n", __func__, ep);
 698
 699         req = container_of(_req, struct s3c_request, req);
 700         WARN_ON(!list_empty(&req->queue));
 701         kfree(req);
 702 }
 703
 704 /* dequeue JUST ONE request */
 705 static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 706 {
 707         struct s3c_ep *ep;
 708         struct s3c_request *req;
 709         unsigned long flags;
 710
 711         debug("%s: %p\n", __func__, _ep);
 712
 713         ep = container_of(_ep, struct s3c_ep, ep);
 714         if (!_ep || ep->ep.name == ep0name)
 715                 return -EINVAL;
 716
 717         spin_lock_irqsave(&ep->dev->lock, flags);
 718
 719         /* make sure it's actually queued on this endpoint */
 720         list_for_each_entry(req, &ep->queue, queue) {
 721                 if (&req->req == _req)
 722                         break;
 723         }
 724         if (&req->req != _req) {
 725                 spin_unlock_irqrestore(&ep->dev->lock, flags);
 726                 return -EINVAL;
 727         }
 728
 729         done(ep, req, -ECONNRESET);
 730
 731         spin_unlock_irqrestore(&ep->dev->lock, flags);
 732         return 0;
 733 }
 734
 735 /*
 736  * Return bytes in EP FIFO
 737  */
 738 static int s3c_fifo_status(struct usb_ep *_ep)
 739 {
 740         int count = 0;
 741         struct s3c_ep *ep;
 742
 743         ep = container_of(_ep, struct s3c_ep, ep);
 744         if (!_ep) {
 745                 debug("%s: bad ep\n", __func__);
 746                 return -ENODEV;
 747         }
 748
 749         debug("%s: %d\n", __func__, ep_index(ep));
 750
 751         /* LPD can't report unclaimed bytes from IN fifos */
 752         if (ep_is_in(ep))
 753                 return -EOPNOTSUPP;
 754
 755         return count;
 756 }
 757
 758 /*
 759  * Flush EP FIFO
 760  */
 761 static void s3c_fifo_flush(struct usb_ep *_ep)
 762 {
 763         struct s3c_ep *ep;
 764
 765         ep = container_of(_ep, struct s3c_ep, ep);
 766         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
 767                 debug("%s: bad ep\n", __func__);
 768                 return;
 769         }
 770
 771         debug("%s: %d\n", __func__, ep_index(ep));
 772 }
 773
 774 static const struct usb_gadget_ops s3c_udc_ops = {
 775         /* current versions must always be self-powered */
 776 };
 777
 778 static struct s3c_udc memory = {
 779         .usb_address = 0,
 780         .gadget = {
 781                 .ops = &s3c_udc_ops,
 782                 .ep0 = &memory.ep[0].ep,
 783                 .name = driver_name,
 784         },
 785
 786         /* control endpoint */
 787         .ep[0] = {
 788                 .ep = {
 789                         .name = ep0name,
 790                         .ops = &s3c_ep_ops,
 791                         .maxpacket = EP0_FIFO_SIZE,
 792                 },
 793                 .dev = &memory,
 794
 795                 .bEndpointAddress = 0,
 796                 .bmAttributes = 0,
 797
 798                 .ep_type = ep_control,
 799         },
 800
 801         /* first group of endpoints */
 802         .ep[1] = {
 803                 .ep = {
 804                         .name = "ep1in-bulk",
 805                         .ops = &s3c_ep_ops,
 806                         .maxpacket = EP_FIFO_SIZE,
 807                 },
 808                 .dev = &memory,
 809
 810                 .bEndpointAddress = USB_DIR_IN | 1,
 811                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 812
 813                 .ep_type = ep_bulk_out,
 814                 .fifo_num = 1,
 815         },
 816
 817         .ep[2] = {
 818                 .ep = {
 819                         .name = "ep2out-bulk",
 820                         .ops = &s3c_ep_ops,
 821                         .maxpacket = EP_FIFO_SIZE,
 822                 },
 823                 .dev = &memory,
 824
 825                 .bEndpointAddress = USB_DIR_OUT | 2,
 826                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
 827
 828                 .ep_type = ep_bulk_in,
 829                 .fifo_num = 2,
 830         },
 831
 832         .ep[3] = {
 833                 .ep = {
 834                         .name = "ep3in-int",
 835                         .ops = &s3c_ep_ops,
 836                         .maxpacket = EP_FIFO_SIZE,
 837                 },
 838                 .dev = &memory,
 839
 840                 .bEndpointAddress = USB_DIR_IN | 3,
 841                 .bmAttributes = USB_ENDPOINT_XFER_INT,
 842
 843                 .ep_type = ep_interrupt,
 844                 .fifo_num = 3,
 845         },
 846 };
 847
 848 /*
 849  *      probe - binds to the platform device
 850  */
 851
 852 int s3c_udc_probe(struct s3c_plat_otg_data *pdata)
 853 {
 854         struct s3c_udc *dev = &memory;
 855         int retval = 0, i;
 856
 857         debug("%s: %p\n", __func__, pdata);
 858
 859         dev->pdata = pdata;
 860
 861         phy = (struct s3c_usbotg_phy *)pdata->regs_phy;
 862         reg = (struct s3c_usbotg_reg *)pdata->regs_otg;
 863         usb_phy_ctrl = pdata->usb_phy_ctrl;
 864
 865         /* regs_otg = (void *)pdata->regs_otg; */
 866
 867         dev->gadget.is_dualspeed = 1;   /* Hack only*/
 868         dev->gadget.is_otg = 0;
 869         dev->gadget.is_a_peripheral = 0;
 870         dev->gadget.b_hnp_enable = 0;
 871         dev->gadget.a_hnp_support = 0;
 872         dev->gadget.a_alt_hnp_support = 0;
 873
 874         the_controller = dev;
 875
 876         for (i = 0; i < S3C_MAX_ENDPOINTS+1; i++) {
 877                 dev->dma_buf[i] = memalign(CONFIG_SYS_CACHELINE_SIZE,
 878                                            DMA_BUFFER_SIZE);
 879                 dev->dma_addr[i] = (dma_addr_t) dev->dma_buf[i];
 880                 invalidate_dcache_range((unsigned long) dev->dma_buf[i],
 881                                         (unsigned long) (dev->dma_buf[i]
 882                                                          + DMA_BUFFER_SIZE));
 883         }
 884         usb_ctrl = dev->dma_buf[0];
 885         usb_ctrl_dma_addr = dev->dma_addr[0];
 886
 887         udc_reinit(dev);
 888
 889         return retval;
 890 }
 891
 892 int usb_gadget_handle_interrupts()
 893 {
 894         u32 intr_status = readl(&reg->gintsts);
 895         u32 gintmsk = readl(&reg->gintmsk);
 896
 897         if (intr_status & gintmsk)
 898                 return s3c_udc_irq(1, (void *)the_controller);
 899         return 0;
 900 }