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