drivers/usb/dwc_otg_310/dwc_otg_hcd_linux.c

   1 /* ==========================================================================
   2  * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_linux.c $
   3  * $Revision: #22 $
   4  * $Date: 2012/12/21 $
   5  * $Change: 2131568 $
   6  *
   7  * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
   8  * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
   9  * otherwise expressly agreed to in writing between Synopsys and you.
  10  *
  11  * The Software IS NOT an item of Licensed Software or Licensed Product under
  12  * any End User Software License Agreement or Agreement for Licensed Product
  13  * with Synopsys or any supplement thereto. You are permitted to use and
  14  * redistribute this Software in source and binary forms, with or without
  15  * modification, provided that redistributions of source code must retain this
  16  * notice. You may not view, use, disclose, copy or distribute this file or
  17  * any information contained herein except pursuant to this license grant from
  18  * Synopsys. If you do not agree with this notice, including the disclaimer
  19  * below, then you are not authorized to use the Software.
  20  *
  21  * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
  22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
  25  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  27  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  31  * DAMAGE.
  32  * ========================================================================== */
  33 #ifndef DWC_DEVICE_ONLY
  34
  35 /**
  36  * @file
  37  *
  38  * This file contains the implementation of the HCD. In Linux, the HCD
  39  * implements the hc_driver API.
  40  */
  41 #include <linux/kernel.h>
  42 #include <linux/module.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/init.h>
  45 #include <linux/device.h>
  46 #include <linux/errno.h>
  47 #include <linux/list.h>
  48 #include <linux/interrupt.h>
  49 #include <linux/string.h>
  50 #include <linux/dma-mapping.h>
  51 #include <linux/version.h>
  52 #include <asm/io.h>
  53 #include <linux/usb.h>
  54 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
  55 #include <../drivers/usb/core/hcd.h>
  56 #else
  57 #include <linux/usb/hcd.h>
  58 #endif
  59
  60 #include "dwc_otg_hcd_if.h"
  61 #include "dwc_otg_dbg.h"
  62 #include "dwc_otg_driver.h"
  63 #include "dwc_otg_hcd.h"
  64 #include "dwc_otg_attr.h"
  65 #include "usbdev_rk.h"
  66
  67 /**
  68  * Gets the endpoint number from a _bEndpointAddress argument. The endpoint is
  69  * qualified with its direction (possible 32 endpoints per device).
  70  */
  71 #define dwc_ep_addr_to_endpoint(_bEndpointAddress_) ((_bEndpointAddress_ & USB_ENDPOINT_NUMBER_MASK) | \
  72                                                      ((_bEndpointAddress_ & USB_DIR_IN) != 0) << 4)
  73
  74 static const char dwc_otg_hcd_name[] = "dwc_otg_hcd";
  75
  76 /** @name Linux HC Driver API Functions */
  77 /** @{ */
  78 static int urb_enqueue(struct usb_hcd *hcd,
  79 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
  80                        struct usb_host_endpoint *ep,
  81 #endif
  82                        struct urb *urb, gfp_t mem_flags);
  83 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
  84 static int urb_dequeue(struct usb_hcd *hcd, struct urb *urb);
  85 #else
  86 static int urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
  87 #endif
  88
  89 static void endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep);
  90 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
  91 static void endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep);
  92 #endif
  93 static irqreturn_t dwc_otg_hcd_irq(struct usb_hcd *hcd);
  94 extern int hcd_start(struct usb_hcd *hcd);
  95 extern void hcd_stop(struct usb_hcd *hcd);
  96 extern int hcd_suspend(struct usb_hcd *hcd);
  97 extern int hcd_resume(struct usb_hcd *hcd);
  98 static int get_frame_number(struct usb_hcd *hcd);
  99 extern int hub_status_data(struct usb_hcd *hcd, char *buf);
 100 extern int hub_control(struct usb_hcd *hcd,
 101                        u16 typeReq,
 102                        u16 wValue, u16 wIndex, char *buf, u16 wLength);
 103
 104 struct wrapper_priv_data {
 105         dwc_otg_hcd_t *dwc_otg_hcd;
 106 };
 107
 108 /** @} */
 109
 110 static struct hc_driver dwc_otg_hc_driver = {
 111
 112         .description = dwc_otg_hcd_name,
 113         .product_desc = "DWC OTG Controller",
 114         .hcd_priv_size = sizeof(struct wrapper_priv_data),
 115
 116         .irq = dwc_otg_hcd_irq,
 117
 118         .flags = HCD_MEMORY | HCD_USB2,
 119
 120         /* .reset = */
 121         .start = hcd_start,
 122         /* .suspend = */
 123         /* .resume = */
 124         .stop = hcd_stop,
 125
 126         .urb_enqueue = urb_enqueue,
 127         .urb_dequeue = urb_dequeue,
 128         .endpoint_disable = endpoint_disable,
 129 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
 130         .endpoint_reset = endpoint_reset,
 131 #endif
 132         .get_frame_number = get_frame_number,
 133
 134         .hub_status_data = hub_status_data,
 135         .hub_control = hub_control,
 136         .bus_suspend = hcd_suspend,
 137         .bus_resume = hcd_resume,
 138 };
 139
 140 /** Gets the dwc_otg_hcd from a struct usb_hcd */
 141 static inline dwc_otg_hcd_t *hcd_to_dwc_otg_hcd(struct usb_hcd *hcd)
 142 {
 143         struct wrapper_priv_data *p;
 144         p = (struct wrapper_priv_data *)(hcd->hcd_priv);
 145         return p->dwc_otg_hcd;
 146 }
 147
 148 /** Gets the struct usb_hcd that contains a dwc_otg_hcd_t. */
 149 static inline struct usb_hcd *dwc_otg_hcd_to_hcd(dwc_otg_hcd_t *dwc_otg_hcd)
 150 {
 151         return dwc_otg_hcd_get_priv_data(dwc_otg_hcd);
 152 }
 153
 154 /** Gets the usb_host_endpoint associated with an URB. */
 155 inline struct usb_host_endpoint *dwc_urb_to_endpoint(struct urb *urb)
 156 {
 157         struct usb_device *dev = urb->dev;
 158         int ep_num = usb_pipeendpoint(urb->pipe);
 159
 160         if (!dev)
 161                 return NULL;
 162
 163         if (usb_pipein(urb->pipe))
 164                 return dev->ep_in[ep_num];
 165         else
 166                 return dev->ep_out[ep_num];
 167 }
 168
 169 static int _disconnect(dwc_otg_hcd_t *hcd)
 170 {
 171         struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
 172
 173         usb_hcd->self.is_b_host = 0;
 174         return 0;
 175 }
 176
 177 static int _start(dwc_otg_hcd_t *hcd)
 178 {
 179         struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
 180
 181         usb_hcd->self.is_b_host = dwc_otg_hcd_is_b_host(hcd);
 182         hcd_start(usb_hcd);
 183
 184         return 0;
 185 }
 186
 187 static int _hub_info(dwc_otg_hcd_t *hcd, void *urb_handle, uint32_t *hub_addr,
 188                      uint32_t *port_addr)
 189 {
 190         struct urb *urb = (struct urb *)urb_handle;
 191         if (urb->dev->tt) {
 192                 *hub_addr = urb->dev->tt->hub->devnum;
 193         } else {
 194                 *hub_addr = 0;
 195         }
 196         *port_addr = urb->dev->ttport;
 197         return 0;
 198 }
 199
 200 static int _speed(dwc_otg_hcd_t *hcd, void *urb_handle)
 201 {
 202         struct urb *urb = (struct urb *)urb_handle;
 203         return urb->dev->speed;
 204 }
 205
 206 static int _get_b_hnp_enable(dwc_otg_hcd_t *hcd)
 207 {
 208         struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
 209         return usb_hcd->self.b_hnp_enable;
 210 }
 211
 212 static void allocate_bus_bandwidth(struct usb_hcd *hcd, uint32_t bw,
 213                                    struct urb *urb)
 214 {
 215         hcd_to_bus(hcd)->bandwidth_allocated += bw / urb->interval;
 216         if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 217                 hcd_to_bus(hcd)->bandwidth_isoc_reqs++;
 218         } else {
 219                 hcd_to_bus(hcd)->bandwidth_int_reqs++;
 220         }
 221 }
 222
 223 static void free_bus_bandwidth(struct usb_hcd *hcd, uint32_t bw,
 224                                struct urb *urb)
 225 {
 226         hcd_to_bus(hcd)->bandwidth_allocated -= bw / urb->interval;
 227         if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 228                 hcd_to_bus(hcd)->bandwidth_isoc_reqs--;
 229         } else {
 230                 hcd_to_bus(hcd)->bandwidth_int_reqs--;
 231         }
 232 }
 233
 234 /**
 235  * Sets the final status of an URB and returns it to the device driver. Any
 236  * required cleanup of the URB is performed.
 237  */
 238 static int _complete(dwc_otg_hcd_t *hcd, void *urb_handle,
 239                      dwc_otg_hcd_urb_t *dwc_otg_urb, int32_t status)
 240 {
 241         struct urb *urb = (struct urb *)urb_handle;
 242         if (!urb)
 243                 return 0;
 244 #ifdef DEBUG
 245         if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
 246                 DWC_PRINTF("%s: urb %p, device %d, ep %d %s, status=%d\n",
 247                            __func__, urb, usb_pipedevice(urb->pipe),
 248                            usb_pipeendpoint(urb->pipe),
 249                            usb_pipein(urb->pipe) ? "IN" : "OUT", status);
 250                 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 251                         int i;
 252                         for (i = 0; i < urb->number_of_packets; i++) {
 253                                 DWC_PRINTF("  ISO Desc %d status: %d\n",
 254                                            i, urb->iso_frame_desc[i].status);
 255                         }
 256                 }
 257         }
 258 #endif
 259
 260         urb->actual_length = dwc_otg_hcd_urb_get_actual_length(dwc_otg_urb);
 261         /* Convert status value. */
 262         switch (status) {
 263         case -DWC_E_PROTOCOL:
 264                 status = -EPROTO;
 265                 break;
 266         case -DWC_E_IN_PROGRESS:
 267                 status = -EINPROGRESS;
 268                 break;
 269         case -DWC_E_PIPE:
 270                 status = -EPIPE;
 271                 break;
 272         case -DWC_E_IO:
 273                 status = -EIO;
 274                 break;
 275         case -DWC_E_TIMEOUT:
 276                 status = -ETIMEDOUT;
 277                 break;
 278         case -DWC_E_OVERFLOW:
 279                 status = -EOVERFLOW;
 280                 break;
 281         default:
 282                 if (status) {
 283                         DWC_PRINTF("Uknown urb status %d\n", status);
 284
 285                 }
 286         }
 287
 288         WARN((urb->actual_length > urb->transfer_buffer_length &&
 289               usb_pipein(urb->pipe)),
 290               "DWC_OTG Transfer buffer length less than actual buffer length"
 291               "actual_length %d , buffer_length %d urb->complete %pF\n",
 292               urb->actual_length, urb->transfer_buffer_length,
 293               urb->complete);
 294
 295         if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 296                 int i;
 297
 298                 urb->error_count = dwc_otg_hcd_urb_get_error_count(dwc_otg_urb);
 299                 for (i = 0; i < urb->number_of_packets; ++i) {
 300                         urb->iso_frame_desc[i].actual_length =
 301                             dwc_otg_hcd_urb_get_iso_desc_actual_length
 302                             (dwc_otg_urb, i);
 303                         urb->iso_frame_desc[i].status =
 304                             dwc_otg_hcd_urb_get_iso_desc_status(dwc_otg_urb, i);
 305                 }
 306         }
 307
 308         urb->status = status;
 309         urb->hcpriv = NULL;
 310         if (!status) {
 311                 if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
 312                     (urb->actual_length < urb->transfer_buffer_length)) {
 313                         urb->status = -EREMOTEIO;
 314                 }
 315         }
 316
 317         if ((usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) ||
 318             (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
 319                 struct usb_host_endpoint *ep = dwc_urb_to_endpoint(urb);
 320                 if (ep) {
 321                         free_bus_bandwidth(dwc_otg_hcd_to_hcd(hcd),
 322                                            dwc_otg_hcd_get_ep_bandwidth(hcd,
 323                                                                         ep->
 324                                                                         hcpriv),
 325                                            urb);
 326                 }
 327         }
 328
 329         DWC_FREE(dwc_otg_urb);
 330
 331         usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(hcd), urb);
 332
 333         DWC_SPINUNLOCK(hcd->lock);
 334 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
 335         usb_hcd_giveback_urb(dwc_otg_hcd_to_hcd(hcd), urb);
 336 #else
 337         usb_hcd_giveback_urb(dwc_otg_hcd_to_hcd(hcd), urb, status);
 338 #endif
 339         DWC_SPINLOCK(hcd->lock);
 340
 341         return 0;
 342 }
 343
 344 void dwc_otg_clear_halt(struct urb *_urb)
 345 {
 346         struct dwc_otg_qh *_qh;
 347         struct usb_host_endpoint *ep = dwc_urb_to_endpoint(_urb);
 348         if ((ep) && (ep->hcpriv)) {
 349                 _qh = (dwc_otg_qh_t *) ep->hcpriv;
 350                 _qh->data_toggle = 0;
 351         }
 352 }
 353
 354 static struct dwc_otg_hcd_function_ops hcd_fops = {
 355         .start = _start,
 356         .disconnect = _disconnect,
 357         .hub_info = _hub_info,
 358         .speed = _speed,
 359         .complete = _complete,
 360         .get_b_hnp_enable = _get_b_hnp_enable,
 361 };
 362
 363 static void dwc_otg_hcd_enable(struct work_struct *work)
 364 {
 365         dwc_otg_hcd_t *dwc_otg_hcd;
 366         dwc_otg_core_if_t *core_if;
 367         struct dwc_otg_platform_data *pldata;
 368         dwc_otg_hcd = container_of(work, dwc_otg_hcd_t, host_enable_work.work);
 369         core_if = dwc_otg_hcd->core_if;
 370         pldata = core_if->otg_dev->pldata;
 371         if (dwc_otg_hcd->host_enabled == dwc_otg_hcd->host_setenable) {
 372         /* DWC_PRINT("%s, enable flag %d\n",
 373          *           __func__, dwc_otg_hcd->host_setenable); */
 374                 goto out;
 375         }
 376
 377         if (dwc_otg_hcd->host_setenable == 2) {/* enable -> disable */
 378                 if (pldata->get_status(USB_STATUS_DPDM)) {/* usb device connected */
 379                         dwc_otg_hcd->host_setenable = 1;
 380                         goto out;
 381                 }
 382                 DWC_PRINTF("%s, disable host controller\n", __func__);
 383 #if 0
 384                 if (_core_if->hcd_cb && _core_if->hcd_cb->disconnect) {
 385                         _core_if->hcd_cb->disconnect(_core_if->hcd_cb->p);
 386                 }
 387 #endif
 388                 pldata->soft_reset(pldata, RST_RECNT);
 389                 dwc_otg_disable_host_interrupts(core_if);
 390                 if (pldata->phy_suspend)
 391                         pldata->phy_suspend(pldata, USB_PHY_SUSPEND);
 392                 udelay(3);
 393                 pldata->clock_enable(pldata, 0);
 394         } else if (dwc_otg_hcd->host_setenable == 1) {
 395                 DWC_PRINTF("%s, enable host controller\n", __func__);
 396                 pldata->clock_enable(pldata, 1);
 397                 if (pldata->phy_suspend)
 398                         pldata->phy_suspend(pldata, USB_PHY_ENABLED);
 399                 mdelay(5);
 400                 dwc_otg_core_init(core_if);
 401                 dwc_otg_enable_global_interrupts(core_if);
 402                 cil_hcd_start(core_if);
 403         }
 404         dwc_otg_hcd->host_enabled = dwc_otg_hcd->host_setenable;
 405 out:
 406         return;
 407 }
 408
 409 static void dwc_otg_hcd_connect_detect(unsigned long pdata)
 410 {
 411         dwc_otg_hcd_t *dwc_otg_hcd = (dwc_otg_hcd_t *) pdata;
 412         dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
 413         unsigned long flags;
 414         struct dwc_otg_platform_data *pldata;
 415         pldata = core_if->otg_dev->pldata;
 416         local_irq_save(flags);
 417         if (pldata->get_status(USB_STATUS_DPDM)) {
 418                 /* usb device connected */
 419                 dwc_otg_hcd->host_setenable = 1;
 420         } else {
 421                 /* no device, suspend host */
 422                 if ((dwc_otg_read_hprt0(core_if) & 1) == 0)
 423                         dwc_otg_hcd->host_setenable = 2;
 424         }
 425         if ((dwc_otg_hcd->host_enabled)
 426             && (dwc_otg_hcd->host_setenable != dwc_otg_hcd->host_enabled)) {
 427                 schedule_delayed_work(&dwc_otg_hcd->host_enable_work, 1);
 428         }
 429         mod_timer(&dwc_otg_hcd->connect_detect_timer, jiffies + (HZ << 1));
 430         local_irq_restore(flags);
 431         return;
 432 }
 433
 434 static void otg20_hcd_connect_detect(struct work_struct *work)
 435 {
 436         dwc_otg_hcd_t *dwc_otg_hcd =
 437             container_of(work, dwc_otg_hcd_t, host_enable_work.work);
 438         dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
 439         struct dwc_otg_platform_data *pldata;
 440         pldata = core_if->otg_dev->pldata;
 441
 442         if (pldata->phy_status == USB_PHY_SUSPEND) {
 443                 pldata->clock_enable(pldata, 1);
 444                 pldata->phy_suspend(pldata, USB_PHY_ENABLED);
 445         }
 446         dwc_otg_core_init(core_if);
 447         dwc_otg_enable_global_interrupts(core_if);
 448         cil_hcd_start(core_if);
 449 }
 450
 451 /**
 452  * Initializes the HCD. This function allocates memory for and initializes the
 453  * static parts of the usb_hcd and dwc_otg_hcd structures. It also registers the
 454  * USB bus with the core and calls the hc_driver->start() function. It returns
 455  * a negative error on failure.
 456  */
 457 int otg20_hcd_init(struct platform_device *_dev)
 458 {
 459         struct usb_hcd *hcd = NULL;
 460         dwc_otg_hcd_t *dwc_otg_hcd = NULL;
 461
 462         dwc_otg_device_t *otg_dev = dwc_get_device_platform_data(_dev);
 463         int retval = 0;
 464         int irq;
 465
 466         DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD INIT\n");
 467
 468         /*
 469          * Allocate memory for the base HCD plus the DWC OTG HCD.
 470          * Initialize the base HCD.
 471          */
 472 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
 473         hcd = usb_create_hcd(&dwc_otg_hc_driver, &_dev->dev, _dev->dev.bus_id);
 474 #else
 475         hcd =
 476             usb_create_hcd(&dwc_otg_hc_driver, &_dev->dev,
 477                            dev_name(&_dev->dev));
 478         hcd->has_tt = 1;
 479         /* hcd->uses_new_polling = 1; */
 480         /* hcd->poll_rh = 0; */
 481 #endif
 482         if (!hcd) {
 483                 retval = -ENOMEM;
 484                 goto error1;
 485         }
 486
 487         hcd->regs = otg_dev->os_dep.base;
 488
 489         /* Initialize the DWC OTG HCD. */
 490         dwc_otg_hcd = dwc_otg_hcd_alloc_hcd();
 491         if (!dwc_otg_hcd) {
 492                 goto error2;
 493         }
 494         ((struct wrapper_priv_data *)(hcd->hcd_priv))->dwc_otg_hcd =
 495             dwc_otg_hcd;
 496         otg_dev->hcd = dwc_otg_hcd;
 497
 498         if (dwc_otg_hcd_init(dwc_otg_hcd, otg_dev->core_if)) {
 499                 goto error2;
 500         }
 501
 502         otg_dev->hcd->otg_dev = otg_dev;
 503         hcd->self.otg_port = dwc_otg_hcd_otg_port(dwc_otg_hcd);
 504 #if 0
 505         /* #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33) */
 506         /* don't support for LM(with 2.6.20.1 kernel) */
 507         hcd->self.otg_version = dwc_otg_get_otg_version(otg_dev->core_if);
 508         /* Don't support SG list at this point */
 509         hcd->self.sg_tablesize = 0;
 510 #endif
 511 #if 0
 512         /* LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0) */
 513         /* Do not to do HNP polling if not capable */
 514         /* if (otg_dev->core_if->otg_ver) */
 515         /*      hcd->self.is_hnp_cap = dwc_otg_get_hnpcapable(otg_dev->core_if); */
 516 #endif
 517         /*
 518          * Finish generic HCD initialization and start the HCD. This function
 519          * allocates the DMA buffer pool, registers the USB bus, requests the
 520          * IRQ line, and calls hcd_start method.
 521          */
 522         irq = platform_get_irq(_dev, 0);
 523         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 524         if (retval < 0) {
 525                 goto error2;
 526         }
 527
 528         dwc_otg_hcd_set_priv_data(dwc_otg_hcd, hcd);
 529         dwc_otg_hcd->host_enabled = 1;
 530         if (dwc_otg_is_host_mode(otg_dev->core_if) ||
 531             (otg_dev->core_if->usb_mode == USB_MODE_FORCE_HOST)) {
 532                 INIT_DELAYED_WORK(&dwc_otg_hcd->host_enable_work,
 533                                   otg20_hcd_connect_detect);
 534                 schedule_delayed_work(&dwc_otg_hcd->host_enable_work, 0);
 535         }
 536         return 0;
 537
 538 error2:
 539         usb_put_hcd(hcd);
 540 error1:
 541         return retval;
 542 }
 543
 544 /**
 545  * Initializes the HCD. This function allocates memory for and initializes the
 546  * static parts of the usb_hcd and dwc_otg_hcd structures. It also registers the
 547  * USB bus with the core and calls the hc_driver->start() function. It returns
 548  * a negative error on failure.
 549  */
 550 int host20_hcd_init(struct platform_device *_dev)
 551 {
 552         struct usb_hcd *hcd = NULL;
 553         dwc_otg_hcd_t *dwc_otg_hcd = NULL;
 554
 555         dwc_otg_device_t *otg_dev = dwc_get_device_platform_data(_dev);
 556         int retval = 0;
 557         int irq;
 558         DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD INIT\n");
 559
 560         /*
 561          * Allocate memory for the base HCD plus the DWC OTG HCD.
 562          * Initialize the base HCD.
 563          */
 564 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
 565         hcd = usb_create_hcd(&dwc_otg_hc_driver, &_dev->dev, _dev->dev.bus_id);
 566 #else
 567         hcd =
 568             usb_create_hcd(&dwc_otg_hc_driver, &_dev->dev,
 569                            dev_name(&_dev->dev));
 570         hcd->has_tt = 1;
 571         /* hcd->uses_new_polling = 1; */
 572         /* hcd->poll_rh = 0; */
 573 #endif
 574         if (!hcd) {
 575                 retval = -ENOMEM;
 576                 goto error1;
 577         }
 578
 579         hcd->regs = otg_dev->os_dep.base;
 580
 581         /* Initialize the DWC OTG HCD. */
 582         dwc_otg_hcd = dwc_otg_hcd_alloc_hcd();
 583         if (!dwc_otg_hcd) {
 584                 goto error2;
 585         }
 586         ((struct wrapper_priv_data *)(hcd->hcd_priv))->dwc_otg_hcd =
 587             dwc_otg_hcd;
 588         otg_dev->hcd = dwc_otg_hcd;
 589
 590         if (dwc_otg_hcd_init(dwc_otg_hcd, otg_dev->core_if)) {
 591                 goto error2;
 592         }
 593
 594         otg_dev->hcd->otg_dev = otg_dev;
 595         hcd->self.otg_port = dwc_otg_hcd_otg_port(dwc_otg_hcd);
 596 #if 0
 597         /* #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33) */
 598         /* don't support for LM(with 2.6.20.1 kernel) */
 599         hcd->self.otg_version = dwc_otg_get_otg_version(otg_dev->core_if);
 600         /* Don't support SG list at this point */
 601         hcd->self.sg_tablesize = 0;
 602 #endif
 603 #if 0
 604         /* LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0) */
 605         /* Do not to do HNP polling if not capable */
 606         /* if (otg_dev->core_if->otg_ver) */
 607         /*      hcd->self.is_hnp_cap = dwc_otg_get_hnpcapable(otg_dev->core_if);*/
 608 #endif
 609         /*
 610          * Finish generic HCD initialization and start the HCD. This function
 611          * allocates the DMA buffer pool, registers the USB bus, requests the
 612          * IRQ line, and calls hcd_start method.
 613          */
 614         irq = platform_get_irq(_dev, 0);
 615         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 616         if (retval < 0) {
 617                 goto error2;
 618         }
 619
 620         dwc_otg_hcd_set_priv_data(dwc_otg_hcd, hcd);
 621
 622         dwc_otg_hcd->host_enabled = 2;
 623         dwc_otg_hcd->host_setenable = 2;
 624         dwc_otg_hcd->connect_detect_timer.function = dwc_otg_hcd_connect_detect;
 625         dwc_otg_hcd->connect_detect_timer.data = (unsigned long)(dwc_otg_hcd);
 626         init_timer(&dwc_otg_hcd->connect_detect_timer);
 627         mod_timer(&dwc_otg_hcd->connect_detect_timer, jiffies + (HZ << 1));
 628
 629         INIT_DELAYED_WORK(&dwc_otg_hcd->host_enable_work, dwc_otg_hcd_enable);
 630         return 0;
 631
 632 error2:
 633         usb_put_hcd(hcd);
 634 error1:
 635         return retval;
 636 }
 637
 638 /**
 639  * Removes the HCD.
 640  * Frees memory and resources associated with the HCD and deregisters the bus.
 641  */
 642 void hcd_remove(struct platform_device *_dev)
 643 {
 644
 645         dwc_otg_device_t *otg_dev = dwc_get_device_platform_data(_dev);
 646         dwc_otg_hcd_t *dwc_otg_hcd;
 647         struct usb_hcd *hcd;
 648
 649         DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD REMOVE\n");
 650
 651         if (!otg_dev) {
 652                 DWC_DEBUGPL(DBG_ANY, "%s: otg_dev NULL!\n", __func__);
 653                 return;
 654         }
 655
 656         dwc_otg_hcd = otg_dev->hcd;
 657
 658         if (!dwc_otg_hcd) {
 659                 DWC_DEBUGPL(DBG_ANY, "%s: otg_dev->hcd NULL!\n", __func__);
 660                 return;
 661         }
 662
 663         hcd = dwc_otg_hcd_to_hcd(dwc_otg_hcd);
 664
 665         if (!hcd) {
 666                 DWC_DEBUGPL(DBG_ANY,
 667                             "%s: dwc_otg_hcd_to_hcd(dwc_otg_hcd) NULL!\n",
 668                             __func__);
 669                 return;
 670         }
 671         usb_remove_hcd(hcd);
 672         dwc_otg_hcd_set_priv_data(dwc_otg_hcd, NULL);
 673         dwc_otg_hcd_remove(dwc_otg_hcd);
 674         usb_put_hcd(hcd);
 675 }
 676
 677 /* =========================================================================
 678  *  Linux HC Driver Functions
 679  * ========================================================================= */
 680
 681 /** Initializes the DWC_otg controller and its root hub and prepares it for host
 682  * mode operation. Activates the root port. Returns 0 on success and a negative
 683  * error code on failure. */
 684 int hcd_start(struct usb_hcd *hcd)
 685 {
 686         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
 687         struct usb_bus *bus;
 688
 689         DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD START\n");
 690         bus = hcd_to_bus(hcd);
 691
 692         hcd->state = HC_STATE_RUNNING;
 693         if (dwc_otg_hcd_start(dwc_otg_hcd, &hcd_fops)) {
 694                 if (dwc_otg_hcd->core_if->otg_ver)
 695                         dwc_otg_hcd->core_if->op_state = B_PERIPHERAL;
 696                 return 0;
 697         }
 698
 699         /* Initialize and connect root hub if one is not already attached */
 700         if (bus->root_hub) {
 701                 DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD Has Root Hub\n");
 702                 /* Inform the HUB driver to resume. */
 703                 usb_hcd_resume_root_hub(hcd);
 704         }
 705
 706         return 0;
 707 }
 708
 709 /**
 710  * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
 711  * stopped.
 712  */
 713 void hcd_stop(struct usb_hcd *hcd)
 714 {
 715         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
 716
 717         dwc_otg_hcd_stop(dwc_otg_hcd);
 718 }
 719
 720 static int dwc_otg_hcd_suspend(struct usb_hcd *hcd)
 721 {
 722         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
 723         dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
 724         hprt0_data_t hprt0;
 725         pcgcctl_data_t pcgcctl;
 726         struct dwc_otg_platform_data *pldata;
 727         pldata = core_if->otg_dev->pldata;
 728
 729         if (core_if->op_state == B_PERIPHERAL) {
 730                 DWC_PRINTF("%s, usb device mode\n", __func__);
 731                 return 0;
 732         }
 733
 734         if (!(dwc_otg_hcd->host_enabled & 1))
 735                 return 0;
 736
 737         hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
 738 #ifdef CONFIG_PM_RUNTIME
 739         if ((!hprt0.b.prtena) && (!hprt0.b.prtpwr))
 740                 return 0;
 741 #endif
 742         DWC_PRINTF("%s suspend, HPRT0:0x%x\n", hcd->self.bus_name, hprt0.d32);
 743
 744         if (hprt0.b.prtconnsts) { /* usb device connected */
 745                 if (!hprt0.b.prtsusp) {
 746                         hprt0.b.prtsusp = 1;
 747                         hprt0.b.prtena = 0;
 748                         DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
 749                 }
 750                 udelay(10);
 751                 hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
 752
 753                 if (!hprt0.b.prtsusp) {
 754                         hprt0.b.prtsusp = 1;
 755                         hprt0.b.prtena = 0;
 756                         DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
 757                 }
 758                 mdelay(5);
 759
 760                 pcgcctl.d32 = DWC_READ_REG32(core_if->pcgcctl);
 761                 /* Partial Power-Down mode not enable */
 762                 pcgcctl.b.pwrclmp = 0;
 763                 DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
 764                 udelay(1);
 765                 /* reset PDM  */
 766                 /* pcgcctl.b.rstpdwnmodule = 1; */
 767                 pcgcctl.b.stoppclk = 1; /* stop phy clk */
 768                 DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
 769         } else {/* no device connect */
 770                 if (!pldata->get_status(USB_REMOTE_WAKEUP)) {
 771                         if (pldata->phy_suspend)
 772                                 pldata->phy_suspend(pldata, USB_PHY_SUSPEND);
 773                         udelay(3);
 774                         if (pldata->clock_enable)
 775                                 pldata->clock_enable(pldata, 0);
 776                 }
 777         }
 778
 779         return 0;
 780 }
 781
 782 static int dwc_otg_hcd_resume(struct usb_hcd *hcd)
 783 {
 784         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
 785         dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
 786         hprt0_data_t hprt0;
 787         pcgcctl_data_t pcgcctl;
 788         gintmsk_data_t gintmsk;
 789         struct dwc_otg_platform_data *pldata;
 790         pldata = core_if->otg_dev->pldata;
 791
 792         if (core_if->op_state == B_PERIPHERAL) {
 793                 DWC_PRINTF("%s, usb device mode\n", __func__);
 794                 return 0;
 795         }
 796 /* #ifdef CONFIG_PM_RUNTIME */
 797         if (!(dwc_otg_hcd->host_enabled & 1))
 798                 return 0;
 799 /* #endif */
 800
 801         if (!pldata->get_status(USB_REMOTE_WAKEUP)) {
 802                 if (pldata->clock_enable)
 803                         pldata->clock_enable(pldata, 1);
 804         }
 805
 806         hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
 807 #ifdef CONFIG_PM_RUNTIME
 808         /* USB HCD already resumed by remote wakeup, return now */
 809         if ((!hprt0.b.prtsusp) && (hprt0.b.prtena))
 810                 return 0;
 811 #endif
 812
 813         /* power on */
 814         pcgcctl.d32 = DWC_READ_REG32(core_if->pcgcctl);;
 815         pcgcctl.b.stoppclk = 0; /* restart phy clk */
 816         DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
 817         udelay(1);
 818         pcgcctl.b.pwrclmp = 0;  /* power clamp */
 819         DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
 820         udelay(2);
 821
 822         gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
 823         gintmsk.b.portintr = 0;
 824         DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32);
 825
 826         hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
 827
 828 #ifdef CONFIG_PM_RUNTIME
 829         if ((!hprt0.b.prtena) && (!hprt0.b.prtpwr))
 830                 return 0;
 831 #endif
 832         DWC_PRINTF("%s resume, HPRT0:0x%x\n", hcd->self.bus_name, hprt0.d32);
 833
 834         if (hprt0.b.prtconnsts) {
 835                 /* hprt0.d32 = dwc_read_reg32(core_if->host_if->hprt0); */
 836                 /* DWC_PRINT("%s, HPRT0:0x%x\n",hcd->self.bus_name,hprt0.d32); */
 837                 hprt0.b.prtpwr = 1;
 838                 hprt0.b.prtres = 1;
 839                 hprt0.b.prtena = 0;
 840                 DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
 841                 mdelay(20);
 842                 hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
 843                 /* DWC_PRINT("%s, HPRT0:0x%x\n",hcd->self.bus_name,hprt0.d32); */
 844                 /* hprt0.d32 = 0; */
 845                 hprt0.b.prtpwr = 1;
 846                 hprt0.b.prtres = 0;
 847                 hprt0.b.prtena = 0;
 848                 DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
 849                 hprt0.d32 = 0;
 850                 hprt0.b.prtpwr = 1;
 851                 hprt0.b.prtena = 0;
 852                 hprt0.b.prtconndet = 1;
 853                 DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
 854
 855                 /* hprt0.d32 = dwc_read_reg32(core_if->host_if->hprt0); */
 856                 /* DWC_PRINT("%s, HPRT0:0x%x\n",hcd->self.bus_name,hprt0.d32); */
 857
 858                 mdelay(10);
 859         } else {
 860                 if (!pldata->get_status(USB_REMOTE_WAKEUP)) {
 861                         if (pldata->phy_suspend)
 862                                 pldata->phy_suspend(pldata, USB_PHY_ENABLED);
 863                 }
 864         }
 865         gintmsk.b.portintr = 1;
 866         DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32);
 867
 868         return 0;
 869 }
 870
 871 /** HCD Suspend */
 872 int hcd_suspend(struct usb_hcd *hcd)
 873 {
 874         /* dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd); */
 875
 876         DWC_DEBUGPL(DBG_HCD, "HCD SUSPEND\n");
 877
 878         dwc_otg_hcd_suspend(hcd);
 879
 880         return 0;
 881 }
 882
 883 /** HCD resume */
 884 int hcd_resume(struct usb_hcd *hcd)
 885 {
 886         /* dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd); */
 887
 888         DWC_DEBUGPL(DBG_HCD, "HCD RESUME\n");
 889
 890         dwc_otg_hcd_resume(hcd);
 891
 892         return 0;
 893 }
 894
 895 /** Returns the current frame number. */
 896 static int get_frame_number(struct usb_hcd *hcd)
 897 {
 898         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
 899
 900         return dwc_otg_hcd_get_frame_number(dwc_otg_hcd);
 901 }
 902
 903 #ifdef DEBUG
 904 static void dump_urb_info(struct urb *urb, char *fn_name)
 905 {
 906         DWC_PRINTF("%s, urb %p\n", fn_name, urb);
 907         DWC_PRINTF("  Device address: %d\n", usb_pipedevice(urb->pipe));
 908         DWC_PRINTF("  Endpoint: %d, %s\n", usb_pipeendpoint(urb->pipe),
 909                    (usb_pipein(urb->pipe) ? "IN" : "OUT"));
 910         DWC_PRINTF("  Endpoint type: %s\n", ({
 911                                              char *pipetype;
 912                                              switch (usb_pipetype(urb->pipe)) {
 913                                              case PIPE_CONTROL:
 914                                                   pipetype = "CONTROL";
 915                                              break;
 916                                              case PIPE_BULK:
 917                                                   pipetype = "BULK";
 918                                              break;
 919                                              case PIPE_INTERRUPT:
 920                                                   pipetype = "INTERRUPT";
 921                                              break;
 922                                              case PIPE_ISOCHRONOUS:
 923                                                   pipetype = "ISOCHRONOUS";
 924                                              break;
 925                                              default:
 926                                                   pipetype = "UNKNOWN";
 927                                              break; };
 928                                              pipetype; }
 929                                              )) ;
 930         DWC_PRINTF("  Speed: %s\n", ({
 931                                      char *speed;
 932                                      switch (urb->dev->speed) {
 933                                      case USB_SPEED_HIGH:
 934                                           speed = "HIGH";
 935                                      break;
 936                                      case USB_SPEED_FULL:
 937                                           speed = "FULL";
 938                                      break;
 939                                      case USB_SPEED_LOW:
 940                                           speed = "LOW";
 941                                      break;
 942                                      default:
 943                                           speed = "UNKNOWN";
 944                                      break; };
 945                                      speed; }
 946                                      )) ;
 947         DWC_PRINTF("  Max packet size: %d\n",
 948                    usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)));
 949         DWC_PRINTF("  Data buffer length: %d\n", urb->transfer_buffer_length);
 950         DWC_PRINTF("  Transfer buffer: %p, Transfer DMA: %p\n",
 951                    urb->transfer_buffer, (void *)urb->transfer_dma);
 952         DWC_PRINTF("  Setup buffer: %p, Setup DMA: %p\n",
 953                    urb->setup_packet, (void *)urb->setup_dma);
 954         DWC_PRINTF("  Interval: %d\n", urb->interval);
 955         if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 956                 int i;
 957                 for (i = 0; i < urb->number_of_packets; i++) {
 958                         DWC_PRINTF("  ISO Desc %d:\n", i);
 959                         DWC_PRINTF("    offset: %d, length %d\n",
 960                                    urb->iso_frame_desc[i].offset,
 961                                    urb->iso_frame_desc[i].length);
 962                 }
 963         }
 964 }
 965
 966 #endif
 967
 968 /** Starts processing a USB transfer request specified by a USB Request Block
 969  * (URB). mem_flags indicates the type of memory allocation to use while
 970  * processing this URB. */
 971 static int urb_enqueue(struct usb_hcd *hcd,
 972 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
 973                        struct usb_host_endpoint *ep,
 974 #endif
 975                        struct urb *urb, gfp_t mem_flags)
 976 {
 977         int retval = 0;
 978 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
 979         struct usb_host_endpoint *ep = urb->ep;
 980 #endif
 981         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
 982         dwc_otg_hcd_urb_t *dwc_otg_urb;
 983         int i;
 984         int alloc_bandwidth = 0;
 985         uint8_t ep_type = 0;
 986         uint32_t flags = 0;
 987         dwc_irqflags_t irq_flags;
 988         void *buf;
 989
 990 #ifdef DEBUG
 991         if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
 992                 dump_urb_info(urb, "urb_enqueue");
 993         }
 994 #endif
 995
 996         if (unlikely(atomic_read(&urb->use_count) > 1)) {
 997                 retval = -EPERM;
 998                 printk("%s urb %p already in queue, qtd %p, use_count %d\n",
 999                        __func__, urb, urb->hcpriv,
1000                        atomic_read(&urb->use_count));
1001                 return retval;
1002         }
1003
1004         if (unlikely(atomic_read(&urb->reject))) {
1005                 retval = -EPERM;
1006                 DWC_DEBUGPL(DBG_HCD,
1007                             "%s urb %p submissions will fail,reject %d,count %d\n",
1008                             __func__, urb, atomic_read(&urb->reject),
1009                             atomic_read(&urb->use_count));
1010                 return retval;
1011         }
1012
1013         if ((usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
1014             || (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
1015                 if (!dwc_otg_hcd_is_bandwidth_allocated
1016                     (dwc_otg_hcd, &ep->hcpriv)) {
1017                         alloc_bandwidth = 1;
1018                 }
1019         }
1020
1021         switch (usb_pipetype(urb->pipe)) {
1022         case PIPE_CONTROL:
1023                 ep_type = USB_ENDPOINT_XFER_CONTROL;
1024                 break;
1025         case PIPE_ISOCHRONOUS:
1026                 ep_type = USB_ENDPOINT_XFER_ISOC;
1027                 break;
1028         case PIPE_BULK:
1029                 ep_type = USB_ENDPOINT_XFER_BULK;
1030                 break;
1031         case PIPE_INTERRUPT:
1032                 ep_type = USB_ENDPOINT_XFER_INT;
1033                 break;
1034         default:
1035                 DWC_WARN("Wrong ep type\n");
1036         }
1037
1038         dwc_otg_urb = dwc_otg_hcd_urb_alloc(dwc_otg_hcd,
1039                                             urb->number_of_packets,
1040                                             mem_flags == GFP_ATOMIC ? 1 : 0);
1041
1042         dwc_otg_hcd_urb_set_pipeinfo(dwc_otg_urb, usb_pipedevice(urb->pipe),
1043                                      usb_pipeendpoint(urb->pipe), ep_type,
1044                                      usb_pipein(urb->pipe),
1045                                      usb_maxpacket(urb->dev, urb->pipe,
1046                                                    !(usb_pipein(urb->pipe))));
1047
1048 #ifdef DEBUG
1049         if ((uint32_t) urb->transfer_buffer & 3) {
1050                 DWC_PRINTF
1051                     ("%s urb->transfer_buffer address not align to 4-byte 0x%x\n",
1052                      __func__, (uint32_t) urb->transfer_buffer);
1053         }
1054 #endif
1055
1056         buf = urb->transfer_buffer;
1057
1058         if (hcd->self.uses_dma) {
1059                 /*
1060                  * Calculate virtual address from physical address,
1061                  * because some class driver may not fill transfer_buffer.
1062                  * In Buffer DMA mode virual address is used,
1063                  * when handling non DWORD aligned buffers.
1064                  */
1065                 buf = phys_to_virt(urb->transfer_dma);
1066         }
1067
1068         if (!(urb->transfer_flags & URB_NO_INTERRUPT))
1069                 flags |= URB_GIVEBACK_ASAP;
1070         if (urb->transfer_flags & URB_ZERO_PACKET)
1071                 flags |= URB_SEND_ZERO_PACKET;
1072
1073         dwc_otg_hcd_urb_set_params(dwc_otg_urb, urb, buf,
1074                                    urb->transfer_dma,
1075                                    urb->transfer_buffer_length,
1076                                    urb->setup_packet,
1077                                    urb->setup_dma, flags, urb->interval);
1078
1079         for (i = 0; i < urb->number_of_packets; ++i) {
1080                 dwc_otg_hcd_urb_set_iso_desc_params(dwc_otg_urb, i,
1081                                                     urb->iso_frame_desc[i].
1082                                                     offset,
1083                                                     urb->iso_frame_desc[i].
1084                                                     length);
1085         }
1086
1087         urb->hcpriv = dwc_otg_urb;
1088
1089         DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &irq_flags);
1090         retval = usb_hcd_link_urb_to_ep(hcd, urb);
1091         DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, irq_flags);
1092         if (retval)
1093                 goto fail1;
1094
1095         retval = dwc_otg_hcd_urb_enqueue(dwc_otg_hcd, dwc_otg_urb, &ep->hcpriv,
1096                                          mem_flags == GFP_ATOMIC ? 1 : 0);
1097         if (retval) {
1098                 if (retval == -DWC_E_NO_DEVICE)
1099                         retval = -ENODEV;
1100                 goto fail2;
1101         }
1102
1103         if (alloc_bandwidth) {
1104                 allocate_bus_bandwidth(hcd, dwc_otg_hcd_get_ep_bandwidth
1105                                        (dwc_otg_hcd, ep->hcpriv), urb);
1106         }
1107
1108         return 0;
1109 fail2:
1110         /*  */
1111         DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &irq_flags);
1112         dwc_otg_urb->priv = NULL;
1113         usb_hcd_unlink_urb_from_ep(hcd, urb);
1114         DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, irq_flags);
1115 fail1:
1116         urb->hcpriv = NULL;
1117         DWC_FREE(dwc_otg_urb);
1118         return retval;
1119 }
1120
1121 /** Aborts/cancels a USB transfer request. Always returns 0 to indicate
1122  * success.  */
1123 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
1124 static int urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
1125 #else
1126 static int urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1127 #endif
1128 {
1129         int rc;
1130         dwc_irqflags_t flags;
1131         dwc_otg_hcd_t *dwc_otg_hcd;
1132         DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD URB Dequeue\n");
1133
1134         dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
1135
1136 #ifdef DEBUG
1137         if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
1138                 dump_urb_info(urb, "urb_dequeue");
1139         }
1140 #endif
1141
1142         if (!urb) {
1143                 DWC_PRINTF("%s error: urb is %p!!!\n", __func__, urb);
1144                 return 0;
1145         }
1146
1147         DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &flags);
1148         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1149         if (rc) {
1150                 DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
1151                 return rc;
1152         }
1153
1154         dwc_otg_hcd_urb_dequeue(dwc_otg_hcd, urb->hcpriv);
1155         DWC_FREE(urb->hcpriv);
1156         urb->hcpriv = NULL;
1157         usb_hcd_unlink_urb_from_ep(hcd, urb);
1158         DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
1159
1160         /* Higher layer software sets URB status. */
1161 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
1162         usb_hcd_giveback_urb(hcd, urb);
1163 #else
1164         usb_hcd_giveback_urb(hcd, urb, status);
1165 #endif
1166         if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
1167                 DWC_PRINTF("Called usb_hcd_giveback_urb()\n");
1168                 DWC_PRINTF("  urb->status = %d\n", urb->status);
1169         }
1170
1171         return 0;
1172 }
1173
1174 /* Frees resources in the DWC_otg controller related to a given endpoint. Also
1175  * clears state in the HCD related to the endpoint. Any URBs for the endpoint
1176  * must already be dequeued. */
1177 static void endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1178 {
1179         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
1180
1181         DWC_DEBUGPL(DBG_HCD,
1182                     "DWC OTG HCD EP DISABLE: _bEndpointAddress=0x%02x, "
1183                     "endpoint=%d\n", ep->desc.bEndpointAddress,
1184                     dwc_ep_addr_to_endpoint(ep->desc.bEndpointAddress));
1185         dwc_otg_hcd_endpoint_disable(dwc_otg_hcd, ep->hcpriv, 250);
1186         ep->hcpriv = NULL;
1187 }
1188
1189 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
1190 /* Resets endpoint specific parameter values, in current version used to reset
1191  * the data toggle(as a WA). This function can be called from usb_clear_halt routine */
1192 static void endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1193 {
1194         dwc_irqflags_t flags;
1195         struct usb_device *udev = NULL;
1196         int epnum = usb_endpoint_num(&ep->desc);
1197         int is_out = usb_endpoint_dir_out(&ep->desc);
1198         int is_control = usb_endpoint_xfer_control(&ep->desc);
1199         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
1200
1201         struct platform_device *_dev = dwc_otg_hcd->otg_dev->os_dep.pdev;
1202         if (_dev)
1203                 udev = to_usb_device(&_dev->dev);
1204         else
1205                 return;
1206
1207         DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD EP RESET: Endpoint Num=0x%02d\n",
1208                     epnum);
1209
1210         DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &flags);
1211         usb_settoggle(udev, epnum, is_out, 0);
1212         if (is_control)
1213                 usb_settoggle(udev, epnum, !is_out, 0);
1214
1215         if (ep->hcpriv) {
1216                 dwc_otg_hcd_endpoint_reset(dwc_otg_hcd, ep->hcpriv);
1217         }
1218         DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
1219 }
1220 #endif
1221
1222 /** Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
1223  * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid
1224  * interrupt.
1225  *
1226  * This function is called by the USB core when an interrupt occurs */
1227 static irqreturn_t dwc_otg_hcd_irq(struct usb_hcd *hcd)
1228 {
1229         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
1230         int32_t retval = dwc_otg_hcd_handle_intr(dwc_otg_hcd);
1231         if (retval != 0) {
1232                 /* S3C2410X_CLEAR_EINTPEND(); */
1233         }
1234         return IRQ_RETVAL(retval);
1235 }
1236
1237 /** Creates Status Change bitmap for the root hub and root port. The bitmap is
1238  * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1
1239  * is the status change indicator for the single root port. Returns 1 if either
1240  * change indicator is 1, otherwise returns 0. */
1241 int hub_status_data(struct usb_hcd *hcd, char *buf)
1242 {
1243         dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
1244
1245         buf[0] = 0;
1246         buf[0] |= (dwc_otg_hcd_is_status_changed(dwc_otg_hcd, 1)) << 1;
1247
1248         return (buf[0] != 0);
1249 }
1250
1251 /** Handles hub class-specific requests. */
1252 int hub_control(struct usb_hcd *hcd,
1253                 u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength)
1254 {
1255         int retval;
1256
1257         retval = dwc_otg_hcd_hub_control(hcd_to_dwc_otg_hcd(hcd),
1258                                          typeReq, wValue, wIndex, buf, wLength);
1259
1260         switch (retval) {
1261         case -DWC_E_INVALID:
1262                 retval = -EINVAL;
1263                 break;
1264         }
1265
1266         return retval;
1267 }
1268
1269 #endif /* DWC_DEVICE_ONLY */