git.oblomov.eu Git - linux-2.6/blob - drivers/usb/gadget/fsl_usb2_udc.c

   1 /*
   2  * Copyright (C) 2004-2007 Freescale Semicondutor, Inc. All rights reserved.
   3  *
   4  * Author: Li Yang <leoli@freescale.com>
   5  *         Jiang Bo <tanya.jiang@freescale.com>
   6  *
   7  * Description:
   8  * Freescale high-speed USB SOC DR module device controller driver.
   9  * This can be found on MPC8349E/MPC8313E cpus.
  10  * The driver is previously named as mpc_udc.  Based on bare board
  11  * code from Dave Liu and Shlomi Gridish.
  12  *
  13  * This program is free software; you can redistribute  it and/or modify it
  14  * under  the terms of  the GNU General  Public License as published by the
  15  * Free Software Foundation;  either version 2 of the  License, or (at your
  16  * option) any later version.
  17  */
  18
  19 #undef VERBOSE
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/ioport.h>
  24 #include <linux/types.h>
  25 #include <linux/errno.h>
  26 #include <linux/delay.h>
  27 #include <linux/sched.h>
  28 #include <linux/slab.h>
  29 #include <linux/init.h>
  30 #include <linux/timer.h>
  31 #include <linux/list.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/proc_fs.h>
  34 #include <linux/mm.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/device.h>
  37 #include <linux/usb/ch9.h>
  38 #include <linux/usb_gadget.h>
  39 #include <linux/usb/otg.h>
  40 #include <linux/dma-mapping.h>
  41 #include <linux/platform_device.h>
  42 #include <linux/fsl_devices.h>
  43 #include <linux/dmapool.h>
  44
  45 #include <asm/byteorder.h>
  46 #include <asm/io.h>
  47 #include <asm/irq.h>
  48 #include <asm/system.h>
  49 #include <asm/unaligned.h>
  50 #include <asm/dma.h>
  51 #include <asm/cacheflush.h>
  52
  53 #include "fsl_usb2_udc.h"
  54
  55 #define DRIVER_DESC     "Freescale High-Speed USB SOC Device Controller driver"
  56 #define DRIVER_AUTHOR   "Li Yang/Jiang Bo"
  57 #define DRIVER_VERSION  "Apr 20, 2007"
  58
  59 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  60
  61 static const char driver_name[] = "fsl-usb2-udc";
  62 static const char driver_desc[] = DRIVER_DESC;
  63
  64 volatile static struct usb_dr_device *dr_regs = NULL;
  65 volatile static struct usb_sys_interface *usb_sys_regs = NULL;
  66
  67 /* it is initialized in probe()  */
  68 static struct fsl_udc *udc_controller = NULL;
  69
  70 static const struct usb_endpoint_descriptor
  71 fsl_ep0_desc = {
  72         .bLength =              USB_DT_ENDPOINT_SIZE,
  73         .bDescriptorType =      USB_DT_ENDPOINT,
  74         .bEndpointAddress =     0,
  75         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
  76         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
  77 };
  78
  79 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state);
  80 static int fsl_udc_resume(struct platform_device *pdev);
  81 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
  82
  83 #ifdef CONFIG_PPC32
  84 #define fsl_readl(addr)         in_le32(addr)
  85 #define fsl_writel(addr, val32) out_le32(val32, addr)
  86 #else
  87 #define fsl_readl(addr)         readl(addr)
  88 #define fsl_writel(addr, val32) writel(addr, val32)
  89 #endif
  90
  91 /********************************************************************
  92  *      Internal Used Function
  93 ********************************************************************/
  94 /*-----------------------------------------------------------------
  95  * done() - retire a request; caller blocked irqs
  96  * @status : request status to be set, only works when
  97  *      request is still in progress.
  98  *--------------------------------------------------------------*/
  99 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
 100 {
 101         struct fsl_udc *udc = NULL;
 102         unsigned char stopped = ep->stopped;
 103         struct ep_td_struct *curr_td, *next_td;
 104         int j;
 105
 106         udc = (struct fsl_udc *)ep->udc;
 107         /* Removed the req from fsl_ep->queue */
 108         list_del_init(&req->queue);
 109
 110         /* req.status should be set as -EINPROGRESS in ep_queue() */
 111         if (req->req.status == -EINPROGRESS)
 112                 req->req.status = status;
 113         else
 114                 status = req->req.status;
 115
 116         /* Free dtd for the request */
 117         next_td = req->head;
 118         for (j = 0; j < req->dtd_count; j++) {
 119                 curr_td = next_td;
 120                 if (j != req->dtd_count - 1) {
 121                         next_td = curr_td->next_td_virt;
 122                 }
 123                 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
 124         }
 125
 126         if (req->mapped) {
 127                 dma_unmap_single(ep->udc->gadget.dev.parent,
 128                         req->req.dma, req->req.length,
 129                         ep_is_in(ep)
 130                                 ? DMA_TO_DEVICE
 131                                 : DMA_FROM_DEVICE);
 132                 req->req.dma = DMA_ADDR_INVALID;
 133                 req->mapped = 0;
 134         } else
 135                 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
 136                         req->req.dma, req->req.length,
 137                         ep_is_in(ep)
 138                                 ? DMA_TO_DEVICE
 139                                 : DMA_FROM_DEVICE);
 140
 141         if (status && (status != -ESHUTDOWN))
 142                 VDBG("complete %s req %p stat %d len %u/%u",
 143                         ep->ep.name, &req->req, status,
 144                         req->req.actual, req->req.length);
 145
 146         ep->stopped = 1;
 147
 148         spin_unlock(&ep->udc->lock);
 149         /* complete() is from gadget layer,
 150          * eg fsg->bulk_in_complete() */
 151         if (req->req.complete)
 152                 req->req.complete(&ep->ep, &req->req);
 153
 154         spin_lock(&ep->udc->lock);
 155         ep->stopped = stopped;
 156 }
 157
 158 /*-----------------------------------------------------------------
 159  * nuke(): delete all requests related to this ep
 160  * called with spinlock held
 161  *--------------------------------------------------------------*/
 162 static void nuke(struct fsl_ep *ep, int status)
 163 {
 164         ep->stopped = 1;
 165
 166         /* Flush fifo */
 167         fsl_ep_fifo_flush(&ep->ep);
 168
 169         /* Whether this eq has request linked */
 170         while (!list_empty(&ep->queue)) {
 171                 struct fsl_req *req = NULL;
 172
 173                 req = list_entry(ep->queue.next, struct fsl_req, queue);
 174                 done(ep, req, status);
 175         }
 176 }
 177
 178 /*------------------------------------------------------------------
 179         Internal Hardware related function
 180  ------------------------------------------------------------------*/
 181
 182 static int dr_controller_setup(struct fsl_udc *udc)
 183 {
 184         unsigned int tmp = 0, portctrl = 0, ctrl = 0;
 185         unsigned long timeout;
 186 #define FSL_UDC_RESET_TIMEOUT 1000
 187
 188         /* before here, make sure dr_regs has been initialized */
 189         if (!udc)
 190                 return -EINVAL;
 191
 192         /* Stop and reset the usb controller */
 193         tmp = fsl_readl(&dr_regs->usbcmd);
 194         tmp &= ~USB_CMD_RUN_STOP;
 195         fsl_writel(tmp, &dr_regs->usbcmd);
 196
 197         tmp = fsl_readl(&dr_regs->usbcmd);
 198         tmp |= USB_CMD_CTRL_RESET;
 199         fsl_writel(tmp, &dr_regs->usbcmd);
 200
 201         /* Wait for reset to complete */
 202         timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
 203         while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
 204                 if (time_after(jiffies, timeout)) {
 205                         ERR("udc reset timeout! \n");
 206                         return -ETIMEDOUT;
 207                 }
 208                 cpu_relax();
 209         }
 210
 211         /* Set the controller as device mode */
 212         tmp = fsl_readl(&dr_regs->usbmode);
 213         tmp |= USB_MODE_CTRL_MODE_DEVICE;
 214         /* Disable Setup Lockout */
 215         tmp |= USB_MODE_SETUP_LOCK_OFF;
 216         fsl_writel(tmp, &dr_regs->usbmode);
 217
 218         /* Clear the setup status */
 219         fsl_writel(0, &dr_regs->usbsts);
 220
 221         tmp = udc->ep_qh_dma;
 222         tmp &= USB_EP_LIST_ADDRESS_MASK;
 223         fsl_writel(tmp, &dr_regs->endpointlistaddr);
 224
 225         VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
 226                 (int)udc->ep_qh, (int)tmp,
 227                 fsl_readl(&dr_regs->endpointlistaddr));
 228
 229         /* Config PHY interface */
 230         portctrl = fsl_readl(&dr_regs->portsc1);
 231         portctrl &= ~PORTSCX_PHY_TYPE_SEL;
 232         switch (udc->phy_mode) {
 233         case FSL_USB2_PHY_ULPI:
 234                 portctrl |= PORTSCX_PTS_ULPI;
 235                 break;
 236         case FSL_USB2_PHY_UTMI:
 237         case FSL_USB2_PHY_UTMI_WIDE:
 238                 portctrl |= PORTSCX_PTS_UTMI;
 239                 break;
 240         case FSL_USB2_PHY_SERIAL:
 241                 portctrl |= PORTSCX_PTS_FSLS;
 242                 break;
 243         default:
 244                 return -EINVAL;
 245         }
 246         fsl_writel(portctrl, &dr_regs->portsc1);
 247
 248         /* Config control enable i/o output, cpu endian register */
 249         ctrl = __raw_readl(&usb_sys_regs->control);
 250         ctrl |= USB_CTRL_IOENB;
 251         __raw_writel(ctrl, &usb_sys_regs->control);
 252
 253 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 254         /* Turn on cache snooping hardware, since some PowerPC platforms
 255          * wholly rely on hardware to deal with cache coherent. */
 256
 257         /* Setup Snooping for all the 4GB space */
 258         tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
 259         __raw_writel(tmp, &usb_sys_regs->snoop1);
 260         tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
 261         __raw_writel(tmp, &usb_sys_regs->snoop2);
 262 #endif
 263
 264         return 0;
 265 }
 266
 267 /* Enable DR irq and set controller to run state */
 268 static void dr_controller_run(struct fsl_udc *udc)
 269 {
 270         u32 temp;
 271
 272         /* Enable DR irq reg */
 273         temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
 274                 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
 275                 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
 276
 277         fsl_writel(temp, &dr_regs->usbintr);
 278
 279         /* Clear stopped bit */
 280         udc->stopped = 0;
 281
 282         /* Set the controller as device mode */
 283         temp = fsl_readl(&dr_regs->usbmode);
 284         temp |= USB_MODE_CTRL_MODE_DEVICE;
 285         fsl_writel(temp, &dr_regs->usbmode);
 286
 287         /* Set controller to Run */
 288         temp = fsl_readl(&dr_regs->usbcmd);
 289         temp |= USB_CMD_RUN_STOP;
 290         fsl_writel(temp, &dr_regs->usbcmd);
 291
 292         return;
 293 }
 294
 295 static void dr_controller_stop(struct fsl_udc *udc)
 296 {
 297         unsigned int tmp;
 298
 299         /* disable all INTR */
 300         fsl_writel(0, &dr_regs->usbintr);
 301
 302         /* Set stopped bit for isr */
 303         udc->stopped = 1;
 304
 305         /* disable IO output */
 306 /*      usb_sys_regs->control = 0; */
 307
 308         /* set controller to Stop */
 309         tmp = fsl_readl(&dr_regs->usbcmd);
 310         tmp &= ~USB_CMD_RUN_STOP;
 311         fsl_writel(tmp, &dr_regs->usbcmd);
 312
 313         return;
 314 }
 315
 316 void dr_ep_setup(unsigned char ep_num, unsigned char dir, unsigned char ep_type)
 317 {
 318         unsigned int tmp_epctrl = 0;
 319
 320         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 321         if (dir) {
 322                 if (ep_num)
 323                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 324                 tmp_epctrl |= EPCTRL_TX_ENABLE;
 325                 tmp_epctrl |= ((unsigned int)(ep_type)
 326                                 << EPCTRL_TX_EP_TYPE_SHIFT);
 327         } else {
 328                 if (ep_num)
 329                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 330                 tmp_epctrl |= EPCTRL_RX_ENABLE;
 331                 tmp_epctrl |= ((unsigned int)(ep_type)
 332                                 << EPCTRL_RX_EP_TYPE_SHIFT);
 333         }
 334
 335         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 336 }
 337
 338 static void
 339 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
 340 {
 341         u32 tmp_epctrl = 0;
 342
 343         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 344
 345         if (value) {
 346                 /* set the stall bit */
 347                 if (dir)
 348                         tmp_epctrl |= EPCTRL_TX_EP_STALL;
 349                 else
 350                         tmp_epctrl |= EPCTRL_RX_EP_STALL;
 351         } else {
 352                 /* clear the stall bit and reset data toggle */
 353                 if (dir) {
 354                         tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
 355                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 356                 } else {
 357                         tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
 358                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 359                 }
 360         }
 361         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 362 }
 363
 364 /* Get stall status of a specific ep
 365    Return: 0: not stalled; 1:stalled */
 366 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
 367 {
 368         u32 epctrl;
 369
 370         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 371         if (dir)
 372                 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
 373         else
 374                 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
 375 }
 376
 377 /********************************************************************
 378         Internal Structure Build up functions
 379 ********************************************************************/
 380
 381 /*------------------------------------------------------------------
 382 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
 383  * @zlt: Zero Length Termination Select (1: disable; 0: enable)
 384  * @mult: Mult field
 385  ------------------------------------------------------------------*/
 386 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
 387                 unsigned char dir, unsigned char ep_type,
 388                 unsigned int max_pkt_len,
 389                 unsigned int zlt, unsigned char mult)
 390 {
 391         struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
 392         unsigned int tmp = 0;
 393
 394         /* set the Endpoint Capabilites in QH */
 395         switch (ep_type) {
 396         case USB_ENDPOINT_XFER_CONTROL:
 397                 /* Interrupt On Setup (IOS). for control ep  */
 398                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 399                         | EP_QUEUE_HEAD_IOS;
 400                 break;
 401         case USB_ENDPOINT_XFER_ISOC:
 402                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 403                         | (mult << EP_QUEUE_HEAD_MULT_POS);
 404                 break;
 405         case USB_ENDPOINT_XFER_BULK:
 406         case USB_ENDPOINT_XFER_INT:
 407                 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
 408                 break;
 409         default:
 410                 VDBG("error ep type is %d", ep_type);
 411                 return;
 412         }
 413         if (zlt)
 414                 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
 415         p_QH->max_pkt_length = cpu_to_le32(tmp);
 416
 417         return;
 418 }
 419
 420 /* Setup qh structure and ep register for ep0. */
 421 static void ep0_setup(struct fsl_udc *udc)
 422 {
 423         /* the intialization of an ep includes: fields in QH, Regs,
 424          * fsl_ep struct */
 425         struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
 426                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 427         struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
 428                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 429         dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
 430         dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
 431
 432         return;
 433
 434 }
 435
 436 /***********************************************************************
 437                 Endpoint Management Functions
 438 ***********************************************************************/
 439
 440 /*-------------------------------------------------------------------------
 441  * when configurations are set, or when interface settings change
 442  * for example the do_set_interface() in gadget layer,
 443  * the driver will enable or disable the relevant endpoints
 444  * ep0 doesn't use this routine. It is always enabled.
 445 -------------------------------------------------------------------------*/
 446 static int fsl_ep_enable(struct usb_ep *_ep,
 447                 const struct usb_endpoint_descriptor *desc)
 448 {
 449         struct fsl_udc *udc = NULL;
 450         struct fsl_ep *ep = NULL;
 451         unsigned short max = 0;
 452         unsigned char mult = 0, zlt;
 453         int retval = -EINVAL;
 454         unsigned long flags = 0;
 455
 456         ep = container_of(_ep, struct fsl_ep, ep);
 457
 458         /* catch various bogus parameters */
 459         if (!_ep || !desc || ep->desc
 460                         || (desc->bDescriptorType != USB_DT_ENDPOINT))
 461                 return -EINVAL;
 462
 463         udc = ep->udc;
 464
 465         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
 466                 return -ESHUTDOWN;
 467
 468         max = le16_to_cpu(desc->wMaxPacketSize);
 469
 470         /* Disable automatic zlp generation.  Driver is reponsible to indicate
 471          * explicitly through req->req.zero.  This is needed to enable multi-td
 472          * request. */
 473         zlt = 1;
 474
 475         /* Assume the max packet size from gadget is always correct */
 476         switch (desc->bmAttributes & 0x03) {
 477         case USB_ENDPOINT_XFER_CONTROL:
 478         case USB_ENDPOINT_XFER_BULK:
 479         case USB_ENDPOINT_XFER_INT:
 480                 /* mult = 0.  Execute N Transactions as demonstrated by
 481                  * the USB variable length packet protocol where N is
 482                  * computed using the Maximum Packet Length (dQH) and
 483                  * the Total Bytes field (dTD) */
 484                 mult = 0;
 485                 break;
 486         case USB_ENDPOINT_XFER_ISOC:
 487                 /* Calculate transactions needed for high bandwidth iso */
 488                 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
 489                 max = max & 0x8ff;      /* bit 0~10 */
 490                 /* 3 transactions at most */
 491                 if (mult > 3)
 492                         goto en_done;
 493                 break;
 494         default:
 495                 goto en_done;
 496         }
 497
 498         spin_lock_irqsave(&udc->lock, flags);
 499         ep->ep.maxpacket = max;
 500         ep->desc = desc;
 501         ep->stopped = 0;
 502
 503         /* Controller related setup */
 504         /* Init EPx Queue Head (Ep Capabilites field in QH
 505          * according to max, zlt, mult) */
 506         struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
 507                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 508                                         ?  USB_SEND : USB_RECV),
 509                         (unsigned char) (desc->bmAttributes
 510                                         & USB_ENDPOINT_XFERTYPE_MASK),
 511                         max, zlt, mult);
 512
 513         /* Init endpoint ctrl register */
 514         dr_ep_setup((unsigned char) ep_index(ep),
 515                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 516                                         ? USB_SEND : USB_RECV),
 517                         (unsigned char) (desc->bmAttributes
 518                                         & USB_ENDPOINT_XFERTYPE_MASK));
 519
 520         spin_unlock_irqrestore(&udc->lock, flags);
 521         retval = 0;
 522
 523         VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
 524                         ep->desc->bEndpointAddress & 0x0f,
 525                         (desc->bEndpointAddress & USB_DIR_IN)
 526                                 ? "in" : "out", max);
 527 en_done:
 528         return retval;
 529 }
 530
 531 /*---------------------------------------------------------------------
 532  * @ep : the ep being unconfigured. May not be ep0
 533  * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
 534 *---------------------------------------------------------------------*/
 535 static int fsl_ep_disable(struct usb_ep *_ep)
 536 {
 537         struct fsl_udc *udc = NULL;
 538         struct fsl_ep *ep = NULL;
 539         unsigned long flags = 0;
 540         u32 epctrl;
 541         int ep_num;
 542
 543         ep = container_of(_ep, struct fsl_ep, ep);
 544         if (!_ep || !ep->desc) {
 545                 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
 546                 return -EINVAL;
 547         }
 548
 549         /* disable ep on controller */
 550         ep_num = ep_index(ep);
 551         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 552         if (ep_is_in(ep))
 553                 epctrl &= ~EPCTRL_TX_ENABLE;
 554         else
 555                 epctrl &= ~EPCTRL_RX_ENABLE;
 556         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 557
 558         udc = (struct fsl_udc *)ep->udc;
 559         spin_lock_irqsave(&udc->lock, flags);
 560
 561         /* nuke all pending requests (does flush) */
 562         nuke(ep, -ESHUTDOWN);
 563
 564         ep->desc = 0;
 565         ep->stopped = 1;
 566         spin_unlock_irqrestore(&udc->lock, flags);
 567
 568         VDBG("disabled %s OK", _ep->name);
 569         return 0;
 570 }
 571
 572 /*---------------------------------------------------------------------
 573  * allocate a request object used by this endpoint
 574  * the main operation is to insert the req->queue to the eq->queue
 575  * Returns the request, or null if one could not be allocated
 576 *---------------------------------------------------------------------*/
 577 static struct usb_request *
 578 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
 579 {
 580         struct fsl_req *req = NULL;
 581
 582         req = kzalloc(sizeof *req, gfp_flags);
 583         if (!req)
 584                 return NULL;
 585
 586         req->req.dma = DMA_ADDR_INVALID;
 587         INIT_LIST_HEAD(&req->queue);
 588
 589         return &req->req;
 590 }
 591
 592 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
 593 {
 594         struct fsl_req *req = NULL;
 595
 596         req = container_of(_req, struct fsl_req, req);
 597
 598         if (_req)
 599                 kfree(req);
 600 }
 601
 602 /*------------------------------------------------------------------
 603  * Allocate an I/O buffer
 604 *---------------------------------------------------------------------*/
 605 static void *fsl_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
 606                 dma_addr_t *dma, gfp_t gfp_flags)
 607 {
 608         struct fsl_ep *ep;
 609
 610         if (!_ep)
 611                 return NULL;
 612
 613         ep = container_of(_ep, struct fsl_ep, ep);
 614
 615         return dma_alloc_coherent(ep->udc->gadget.dev.parent,
 616                         bytes, dma, gfp_flags);
 617 }
 618
 619 /*------------------------------------------------------------------
 620  * frees an i/o buffer
 621 *---------------------------------------------------------------------*/
 622 static void fsl_free_buffer(struct usb_ep *_ep, void *buf,
 623                 dma_addr_t dma, unsigned bytes)
 624 {
 625         struct fsl_ep *ep;
 626
 627         if (!_ep)
 628                 return NULL;
 629
 630         ep = container_of(_ep, struct fsl_ep, ep);
 631
 632         dma_free_coherent(ep->udc->gadget.dev.parent, bytes, buf, dma);
 633 }
 634
 635 /*-------------------------------------------------------------------------*/
 636 static int fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 637 {
 638         int i = ep_index(ep) * 2 + ep_is_in(ep);
 639         u32 temp, bitmask, tmp_stat;
 640         struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
 641
 642         /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
 643         VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
 644
 645         bitmask = ep_is_in(ep)
 646                 ? (1 << (ep_index(ep) + 16))
 647                 : (1 << (ep_index(ep)));
 648
 649         /* check if the pipe is empty */
 650         if (!(list_empty(&ep->queue))) {
 651                 /* Add td to the end */
 652                 struct fsl_req *lastreq;
 653                 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
 654                 lastreq->tail->next_td_ptr =
 655                         cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
 656                 /* Read prime bit, if 1 goto done */
 657                 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
 658                         goto out;
 659
 660                 do {
 661                         /* Set ATDTW bit in USBCMD */
 662                         temp = fsl_readl(&dr_regs->usbcmd);
 663                         fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
 664
 665                         /* Read correct status bit */
 666                         tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
 667
 668                 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
 669
 670                 /* Write ATDTW bit to 0 */
 671                 temp = fsl_readl(&dr_regs->usbcmd);
 672                 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
 673
 674                 if (tmp_stat)
 675                         goto out;
 676         }
 677
 678         /* Write dQH next pointer and terminate bit to 0 */
 679         temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
 680         dQH->next_dtd_ptr = cpu_to_le32(temp);
 681
 682         /* Clear active and halt bit */
 683         temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
 684                         | EP_QUEUE_HEAD_STATUS_HALT));
 685         dQH->size_ioc_int_sts &= temp;
 686
 687         /* Prime endpoint by writing 1 to ENDPTPRIME */
 688         temp = ep_is_in(ep)
 689                 ? (1 << (ep_index(ep) + 16))
 690                 : (1 << (ep_index(ep)));
 691         fsl_writel(temp, &dr_regs->endpointprime);
 692 out:
 693         return 0;
 694 }
 695
 696 /* Fill in the dTD structure
 697  * @req: request that the transfer belongs to
 698  * @length: return actually data length of the dTD
 699  * @dma: return dma address of the dTD
 700  * @is_last: return flag if it is the last dTD of the request
 701  * return: pointer to the built dTD */
 702 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
 703                 dma_addr_t *dma, int *is_last)
 704 {
 705         u32 swap_temp;
 706         struct ep_td_struct *dtd;
 707
 708         /* how big will this transfer be? */
 709         *length = min(req->req.length - req->req.actual,
 710                         (unsigned)EP_MAX_LENGTH_TRANSFER);
 711
 712         dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
 713         if (dtd == NULL)
 714                 return dtd;
 715
 716         dtd->td_dma = *dma;
 717         /* Clear reserved field */
 718         swap_temp = cpu_to_le32(dtd->size_ioc_sts);
 719         swap_temp &= ~DTD_RESERVED_FIELDS;
 720         dtd->size_ioc_sts = cpu_to_le32(swap_temp);
 721
 722         /* Init all of buffer page pointers */
 723         swap_temp = (u32) (req->req.dma + req->req.actual);
 724         dtd->buff_ptr0 = cpu_to_le32(swap_temp);
 725         dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
 726         dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
 727         dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
 728         dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
 729
 730         req->req.actual += *length;
 731
 732         /* zlp is needed if req->req.zero is set */
 733         if (req->req.zero) {
 734                 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
 735                         *is_last = 1;
 736                 else
 737                         *is_last = 0;
 738         } else if (req->req.length == req->req.actual)
 739                 *is_last = 1;
 740         else
 741                 *is_last = 0;
 742
 743         if ((*is_last) == 0)
 744                 VDBG("multi-dtd request!\n");
 745         /* Fill in the transfer size; set active bit */
 746         swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
 747
 748         /* Enable interrupt for the last dtd of a request */
 749         if (*is_last && !req->req.no_interrupt)
 750                 swap_temp |= DTD_IOC;
 751
 752         dtd->size_ioc_sts = cpu_to_le32(swap_temp);
 753
 754         mb();
 755
 756         VDBG("length = %d address= 0x%x", *length, (int)*dma);
 757
 758         return dtd;
 759 }
 760
 761 /* Generate dtd chain for a request */
 762 static int fsl_req_to_dtd(struct fsl_req *req)
 763 {
 764         unsigned        count;
 765         int             is_last;
 766         int             is_first =1;
 767         struct ep_td_struct     *last_dtd = NULL, *dtd;
 768         dma_addr_t dma;
 769
 770         do {
 771                 dtd = fsl_build_dtd(req, &count, &dma, &is_last);
 772                 if (dtd == NULL)
 773                         return -ENOMEM;
 774
 775                 if (is_first) {
 776                         is_first = 0;
 777                         req->head = dtd;
 778                 } else {
 779                         last_dtd->next_td_ptr = cpu_to_le32(dma);
 780                         last_dtd->next_td_virt = dtd;
 781                 }
 782                 last_dtd = dtd;
 783
 784                 req->dtd_count++;
 785         } while (!is_last);
 786
 787         dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
 788
 789         req->tail = dtd;
 790
 791         return 0;
 792 }
 793
 794 /* queues (submits) an I/O request to an endpoint */
 795 static int
 796 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 797 {
 798         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 799         struct fsl_req *req = container_of(_req, struct fsl_req, req);
 800         struct fsl_udc *udc;
 801         unsigned long flags;
 802         int is_iso = 0;
 803
 804         /* catch various bogus parameters */
 805         if (!_req || !req->req.complete || !req->req.buf
 806                         || !list_empty(&req->queue)) {
 807                 VDBG("%s, bad params\n", __FUNCTION__);
 808                 return -EINVAL;
 809         }
 810         if (!_ep || (!ep->desc && ep_index(ep))) {
 811                 VDBG("%s, bad ep\n", __FUNCTION__);
 812                 return -EINVAL;
 813         }
 814         if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 815                 if (req->req.length > ep->ep.maxpacket)
 816                         return -EMSGSIZE;
 817                 is_iso = 1;
 818         }
 819
 820         udc = ep->udc;
 821         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 822                 return -ESHUTDOWN;
 823
 824         req->ep = ep;
 825
 826         /* map virtual address to hardware */
 827         if (req->req.dma == DMA_ADDR_INVALID) {
 828                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
 829                                         req->req.buf,
 830                                         req->req.length, ep_is_in(ep)
 831                                                 ? DMA_TO_DEVICE
 832                                                 : DMA_FROM_DEVICE);
 833                 req->mapped = 1;
 834         } else {
 835                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
 836                                         req->req.dma, req->req.length,
 837                                         ep_is_in(ep)
 838                                                 ? DMA_TO_DEVICE
 839                                                 : DMA_FROM_DEVICE);
 840                 req->mapped = 0;
 841         }
 842
 843         req->req.status = -EINPROGRESS;
 844         req->req.actual = 0;
 845         req->dtd_count = 0;
 846
 847         spin_lock_irqsave(&udc->lock, flags);
 848
 849         /* build dtds and push them to device queue */
 850         if (!fsl_req_to_dtd(req)) {
 851                 fsl_queue_td(ep, req);
 852         } else {
 853                 spin_unlock_irqrestore(&udc->lock, flags);
 854                 return -ENOMEM;
 855         }
 856
 857         /* Update ep0 state */
 858         if ((ep_index(ep) == 0))
 859                 udc->ep0_state = DATA_STATE_XMIT;
 860
 861         /* irq handler advances the queue */
 862         if (req != NULL)
 863                 list_add_tail(&req->queue, &ep->queue);
 864         spin_unlock_irqrestore(&udc->lock, flags);
 865
 866         return 0;
 867 }
 868
 869 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
 870 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 871 {
 872         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 873         struct fsl_req *req;
 874         unsigned long flags;
 875         int ep_num, stopped, ret = 0;
 876         u32 epctrl;
 877
 878         if (!_ep || !_req)
 879                 return -EINVAL;
 880
 881         spin_lock_irqsave(&ep->udc->lock, flags);
 882         stopped = ep->stopped;
 883
 884         /* Stop the ep before we deal with the queue */
 885         ep->stopped = 1;
 886         ep_num = ep_index(ep);
 887         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 888         if (ep_is_in(ep))
 889                 epctrl &= ~EPCTRL_TX_ENABLE;
 890         else
 891                 epctrl &= ~EPCTRL_RX_ENABLE;
 892         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 893
 894         /* make sure it's actually queued on this endpoint */
 895         list_for_each_entry(req, &ep->queue, queue) {
 896                 if (&req->req == _req)
 897                         break;
 898         }
 899         if (&req->req != _req) {
 900                 ret = -EINVAL;
 901                 goto out;
 902         }
 903
 904         /* The request is in progress, or completed but not dequeued */
 905         if (ep->queue.next == &req->queue) {
 906                 _req->status = -ECONNRESET;
 907                 fsl_ep_fifo_flush(_ep); /* flush current transfer */
 908
 909                 /* The request isn't the last request in this ep queue */
 910                 if (req->queue.next != &ep->queue) {
 911                         struct ep_queue_head *qh;
 912                         struct fsl_req *next_req;
 913
 914                         qh = ep->qh;
 915                         next_req = list_entry(req->queue.next, struct fsl_req,
 916                                         queue);
 917
 918                         /* Point the QH to the first TD of next request */
 919                         fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
 920                 }
 921
 922                 /* The request hasn't been processed, patch up the TD chain */
 923         } else {
 924                 struct fsl_req *prev_req;
 925
 926                 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
 927                 fsl_writel(fsl_readl(&req->tail->next_td_ptr),
 928                                 &prev_req->tail->next_td_ptr);
 929
 930         }
 931
 932         done(ep, req, -ECONNRESET);
 933
 934         /* Enable EP */
 935 out:    epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 936         if (ep_is_in(ep))
 937                 epctrl |= EPCTRL_TX_ENABLE;
 938         else
 939                 epctrl |= EPCTRL_RX_ENABLE;
 940         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 941         ep->stopped = stopped;
 942
 943         spin_unlock_irqrestore(&ep->udc->lock, flags);
 944         return ret;
 945 }
 946
 947 /*-------------------------------------------------------------------------*/
 948
 949 /*-----------------------------------------------------------------
 950  * modify the endpoint halt feature
 951  * @ep: the non-isochronous endpoint being stalled
 952  * @value: 1--set halt  0--clear halt
 953  * Returns zero, or a negative error code.
 954 *----------------------------------------------------------------*/
 955 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
 956 {
 957         struct fsl_ep *ep = NULL;
 958         unsigned long flags = 0;
 959         int status = -EOPNOTSUPP;       /* operation not supported */
 960         unsigned char ep_dir = 0, ep_num = 0;
 961         struct fsl_udc *udc = NULL;
 962
 963         ep = container_of(_ep, struct fsl_ep, ep);
 964         udc = ep->udc;
 965         if (!_ep || !ep->desc) {
 966                 status = -EINVAL;
 967                 goto out;
 968         }
 969
 970         if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 971                 status = -EOPNOTSUPP;
 972                 goto out;
 973         }
 974
 975         /* Attempt to halt IN ep will fail if any transfer requests
 976          * are still queue */
 977         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
 978                 status = -EAGAIN;
 979                 goto out;
 980         }
 981
 982         status = 0;
 983         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
 984         ep_num = (unsigned char)(ep_index(ep));
 985         spin_lock_irqsave(&ep->udc->lock, flags);
 986         dr_ep_change_stall(ep_num, ep_dir, value);
 987         spin_unlock_irqrestore(&ep->udc->lock, flags);
 988
 989         if (ep_index(ep) == 0) {
 990                 udc->ep0_state = WAIT_FOR_SETUP;
 991                 udc->ep0_dir = 0;
 992         }
 993 out:
 994         VDBG(" %s %s halt stat %d", ep->ep.name,
 995                         value ?  "set" : "clear", status);
 996
 997         return status;
 998 }
 999
1000 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1001 {
1002         struct fsl_ep *ep;
1003         int ep_num, ep_dir;
1004         u32 bits;
1005         unsigned long timeout;
1006 #define FSL_UDC_FLUSH_TIMEOUT 1000
1007
1008         if (!_ep) {
1009                 return;
1010         } else {
1011                 ep = container_of(_ep, struct fsl_ep, ep);
1012                 if (!ep->desc)
1013                         return;
1014         }
1015         ep_num = ep_index(ep);
1016         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1017
1018         if (ep_num == 0)
1019                 bits = (1 << 16) | 1;
1020         else if (ep_dir == USB_SEND)
1021                 bits = 1 << (16 + ep_num);
1022         else
1023                 bits = 1 << ep_num;
1024
1025         timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1026         do {
1027                 fsl_writel(bits, &dr_regs->endptflush);
1028
1029                 /* Wait until flush complete */
1030                 while (fsl_readl(&dr_regs->endptflush)) {
1031                         if (time_after(jiffies, timeout)) {
1032                                 ERR("ep flush timeout\n");
1033                                 return;
1034                         }
1035                         cpu_relax();
1036                 }
1037                 /* See if we need to flush again */
1038         } while (fsl_readl(&dr_regs->endptstatus) & bits);
1039 }
1040
1041 static struct usb_ep_ops fsl_ep_ops = {
1042         .enable = fsl_ep_enable,
1043         .disable = fsl_ep_disable,
1044
1045         .alloc_request = fsl_alloc_request,
1046         .free_request = fsl_free_request,
1047
1048         .alloc_buffer = fsl_alloc_buffer,
1049         .free_buffer = fsl_free_buffer,
1050
1051         .queue = fsl_ep_queue,
1052         .dequeue = fsl_ep_dequeue,
1053
1054         .set_halt = fsl_ep_set_halt,
1055         .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
1056 };
1057
1058 /*-------------------------------------------------------------------------
1059                 Gadget Driver Layer Operations
1060 -------------------------------------------------------------------------*/
1061
1062 /*----------------------------------------------------------------------
1063  * Get the current frame number (from DR frame_index Reg )
1064  *----------------------------------------------------------------------*/
1065 static int fsl_get_frame(struct usb_gadget *gadget)
1066 {
1067         return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1068 }
1069
1070 /*-----------------------------------------------------------------------
1071  * Tries to wake up the host connected to this gadget
1072  -----------------------------------------------------------------------*/
1073 static int fsl_wakeup(struct usb_gadget *gadget)
1074 {
1075         struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1076         u32 portsc;
1077
1078         /* Remote wakeup feature not enabled by host */
1079         if (!udc->remote_wakeup)
1080                 return -ENOTSUPP;
1081
1082         portsc = fsl_readl(&dr_regs->portsc1);
1083         /* not suspended? */
1084         if (!(portsc & PORTSCX_PORT_SUSPEND))
1085                 return 0;
1086         /* trigger force resume */
1087         portsc |= PORTSCX_PORT_FORCE_RESUME;
1088         fsl_writel(portsc, &dr_regs->portsc1);
1089         return 0;
1090 }
1091
1092 static int can_pullup(struct fsl_udc *udc)
1093 {
1094         return udc->driver && udc->softconnect && udc->vbus_active;
1095 }
1096
1097 /* Notify controller that VBUS is powered, Called by whatever
1098    detects VBUS sessions */
1099 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1100 {
1101         struct fsl_udc  *udc;
1102         unsigned long   flags;
1103
1104         udc = container_of(gadget, struct fsl_udc, gadget);
1105         spin_lock_irqsave(&udc->lock, flags);
1106         VDBG("VBUS %s\n", is_active ? "on" : "off");
1107         udc->vbus_active = (is_active != 0);
1108         if (can_pullup(udc))
1109                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1110                                 &dr_regs->usbcmd);
1111         else
1112                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1113                                 &dr_regs->usbcmd);
1114         spin_unlock_irqrestore(&udc->lock, flags);
1115         return 0;
1116 }
1117
1118 /* constrain controller's VBUS power usage
1119  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1120  * reporting how much power the device may consume.  For example, this
1121  * could affect how quickly batteries are recharged.
1122  *
1123  * Returns zero on success, else negative errno.
1124  */
1125 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1126 {
1127 #ifdef CONFIG_USB_OTG
1128         struct fsl_udc *udc;
1129
1130         udc = container_of(gadget, struct fsl_udc, gadget);
1131
1132         if (udc->transceiver)
1133                 return otg_set_power(udc->transceiver, mA);
1134 #endif
1135         return -ENOTSUPP;
1136 }
1137
1138 /* Change Data+ pullup status
1139  * this func is used by usb_gadget_connect/disconnet
1140  */
1141 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1142 {
1143         struct fsl_udc *udc;
1144
1145         udc = container_of(gadget, struct fsl_udc, gadget);
1146         udc->softconnect = (is_on != 0);
1147         if (can_pullup(udc))
1148                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1149                                 &dr_regs->usbcmd);
1150         else
1151                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1152                                 &dr_regs->usbcmd);
1153
1154         return 0;
1155 }
1156
1157 /* defined in usb_gadget.h */
1158 static struct usb_gadget_ops fsl_gadget_ops = {
1159         .get_frame = fsl_get_frame,
1160         .wakeup = fsl_wakeup,
1161 /*      .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1162         .vbus_session = fsl_vbus_session,
1163         .vbus_draw = fsl_vbus_draw,
1164         .pullup = fsl_pullup,
1165 };
1166
1167 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1168    on new transaction */
1169 static void ep0stall(struct fsl_udc *udc)
1170 {
1171         u32 tmp;
1172
1173         /* must set tx and rx to stall at the same time */
1174         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1175         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1176         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1177         udc->ep0_state = WAIT_FOR_SETUP;
1178         udc->ep0_dir = 0;
1179 }
1180
1181 /* Prime a status phase for ep0 */
1182 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1183 {
1184         struct fsl_req *req = udc->status_req;
1185         struct fsl_ep *ep;
1186         int status = 0;
1187
1188         if (direction == EP_DIR_IN)
1189                 udc->ep0_dir = USB_DIR_IN;
1190         else
1191                 udc->ep0_dir = USB_DIR_OUT;
1192
1193         ep = &udc->eps[0];
1194         udc->ep0_state = WAIT_FOR_OUT_STATUS;
1195
1196         req->ep = ep;
1197         req->req.length = 0;
1198         req->req.status = -EINPROGRESS;
1199         req->req.actual = 0;
1200         req->req.complete = NULL;
1201         req->dtd_count = 0;
1202
1203         if (fsl_req_to_dtd(req) == 0)
1204                 status = fsl_queue_td(ep, req);
1205         else
1206                 return -ENOMEM;
1207
1208         if (status)
1209                 ERR("Can't queue ep0 status request \n");
1210         list_add_tail(&req->queue, &ep->queue);
1211
1212         return status;
1213 }
1214
1215 static inline int udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1216 {
1217         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1218
1219         if (!ep->name)
1220                 return 0;
1221
1222         nuke(ep, -ESHUTDOWN);
1223
1224         return 0;
1225 }
1226
1227 /*
1228  * ch9 Set address
1229  */
1230 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1231 {
1232         /* Save the new address to device struct */
1233         udc->device_address = (u8) value;
1234         /* Update usb state */
1235         udc->usb_state = USB_STATE_ADDRESS;
1236         /* Status phase */
1237         if (ep0_prime_status(udc, EP_DIR_IN))
1238                 ep0stall(udc);
1239 }
1240
1241 /*
1242  * ch9 Get status
1243  */
1244 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1245                 u16 index, u16 length)
1246 {
1247         u16 tmp = 0;            /* Status, cpu endian */
1248
1249         struct fsl_req *req;
1250         struct fsl_ep *ep;
1251         int status = 0;
1252
1253         ep = &udc->eps[0];
1254
1255         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1256                 /* Get device status */
1257                 tmp = 1 << USB_DEVICE_SELF_POWERED;
1258                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1259         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1260                 /* Get interface status */
1261                 /* We don't have interface information in udc driver */
1262                 tmp = 0;
1263         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1264                 /* Get endpoint status */
1265                 struct fsl_ep *target_ep;
1266
1267                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1268
1269                 /* stall if endpoint doesn't exist */
1270                 if (!target_ep->desc)
1271                         goto stall;
1272                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1273                                 << USB_ENDPOINT_HALT;
1274         }
1275
1276         udc->ep0_dir = USB_DIR_IN;
1277         /* Borrow the per device status_req */
1278         req = udc->status_req;
1279         /* Fill in the reqest structure */
1280         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1281         req->ep = ep;
1282         req->req.length = 2;
1283         req->req.status = -EINPROGRESS;
1284         req->req.actual = 0;
1285         req->req.complete = NULL;
1286         req->dtd_count = 0;
1287
1288         /* prime the data phase */
1289         if ((fsl_req_to_dtd(req) == 0))
1290                 status = fsl_queue_td(ep, req);
1291         else                    /* no mem */
1292                 goto stall;
1293
1294         if (status) {
1295                 ERR("Can't respond to getstatus request \n");
1296                 goto stall;
1297         }
1298         list_add_tail(&req->queue, &ep->queue);
1299         udc->ep0_state = DATA_STATE_XMIT;
1300         return;
1301 stall:
1302         ep0stall(udc);
1303 }
1304
1305 static void setup_received_irq(struct fsl_udc *udc,
1306                 struct usb_ctrlrequest *setup)
1307 {
1308         u16 wValue = le16_to_cpu(setup->wValue);
1309         u16 wIndex = le16_to_cpu(setup->wIndex);
1310         u16 wLength = le16_to_cpu(setup->wLength);
1311
1312         udc_reset_ep_queue(udc, 0);
1313
1314         switch (setup->bRequest) {
1315                 /* Request that need Data+Status phase from udc */
1316         case USB_REQ_GET_STATUS:
1317                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_STANDARD))
1318                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1319                         break;
1320                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1321                 break;
1322
1323                 /* Requests that need Status phase from udc */
1324         case USB_REQ_SET_ADDRESS:
1325                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1326                                                 | USB_RECIP_DEVICE))
1327                         break;
1328                 ch9setaddress(udc, wValue, wIndex, wLength);
1329                 break;
1330
1331                 /* Handled by udc, no data, status by udc */
1332         case USB_REQ_CLEAR_FEATURE:
1333         case USB_REQ_SET_FEATURE:
1334         {       /* status transaction */
1335                 int rc = -EOPNOTSUPP;
1336
1337                 if ((setup->bRequestType & USB_RECIP_MASK)
1338                                 == USB_RECIP_ENDPOINT) {
1339                         int pipe = get_pipe_by_windex(wIndex);
1340                         struct fsl_ep *ep;
1341
1342                         if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
1343                                 break;
1344                         ep = get_ep_by_pipe(udc, pipe);
1345
1346                         spin_unlock(&udc->lock);
1347                         rc = fsl_ep_set_halt(&ep->ep,
1348                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1349                                                 ? 1 : 0);
1350                         spin_lock(&udc->lock);
1351
1352                 } else if ((setup->bRequestType & USB_RECIP_MASK)
1353                                 == USB_RECIP_DEVICE) {
1354                         /* Note: The driver has not include OTG support yet.
1355                          * This will be set when OTG support is added */
1356                         if (!udc->gadget.is_otg)
1357                                 break;
1358                         else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
1359                                 udc->gadget.b_hnp_enable = 1;
1360                         else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
1361                                 udc->gadget.a_hnp_support = 1;
1362                         else if (setup->bRequest ==
1363                                         USB_DEVICE_A_ALT_HNP_SUPPORT)
1364                                 udc->gadget.a_alt_hnp_support = 1;
1365                         rc = 0;
1366                 }
1367                 if (rc == 0) {
1368                         if (ep0_prime_status(udc, EP_DIR_IN))
1369                                 ep0stall(udc);
1370                 }
1371                 break;
1372         }
1373                 /* Requests handled by gadget */
1374         default:
1375                 if (wLength) {
1376                         /* Data phase from gadget, status phase from udc */
1377                         udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1378                                         ?  USB_DIR_IN : USB_DIR_OUT;
1379                         spin_unlock(&udc->lock);
1380                         if (udc->driver->setup(&udc->gadget,
1381                                         &udc->local_setup_buff) < 0)
1382                                 ep0stall(udc);
1383                         spin_lock(&udc->lock);
1384                         udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1385                                         ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1386
1387                 } else {
1388                         /* No data phase, IN status from gadget */
1389                         udc->ep0_dir = USB_DIR_IN;
1390                         spin_unlock(&udc->lock);
1391                         if (udc->driver->setup(&udc->gadget,
1392                                         &udc->local_setup_buff) < 0)
1393                                 ep0stall(udc);
1394                         spin_lock(&udc->lock);
1395                         udc->ep0_state = WAIT_FOR_OUT_STATUS;
1396                 }
1397                 break;
1398         }
1399 }
1400
1401 /* Process request for Data or Status phase of ep0
1402  * prime status phase if needed */
1403 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1404                 struct fsl_req *req)
1405 {
1406         if (udc->usb_state == USB_STATE_ADDRESS) {
1407                 /* Set the new address */
1408                 u32 new_address = (u32) udc->device_address;
1409                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1410                                 &dr_regs->deviceaddr);
1411         }
1412
1413         done(ep0, req, 0);
1414
1415         switch (udc->ep0_state) {
1416         case DATA_STATE_XMIT:
1417                 /* receive status phase */
1418                 if (ep0_prime_status(udc, EP_DIR_OUT))
1419                         ep0stall(udc);
1420                 break;
1421         case DATA_STATE_RECV:
1422                 /* send status phase */
1423                 if (ep0_prime_status(udc, EP_DIR_IN))
1424                         ep0stall(udc);
1425                 break;
1426         case WAIT_FOR_OUT_STATUS:
1427                 udc->ep0_state = WAIT_FOR_SETUP;
1428                 break;
1429         case WAIT_FOR_SETUP:
1430                 ERR("Unexpect ep0 packets \n");
1431                 break;
1432         default:
1433                 ep0stall(udc);
1434                 break;
1435         }
1436 }
1437
1438 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1439  * being corrupted by another incoming setup packet */
1440 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1441 {
1442         u32 temp;
1443         struct ep_queue_head *qh;
1444
1445         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1446
1447         /* Clear bit in ENDPTSETUPSTAT */
1448         temp = fsl_readl(&dr_regs->endptsetupstat);
1449         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1450
1451         /* while a hazard exists when setup package arrives */
1452         do {
1453                 /* Set Setup Tripwire */
1454                 temp = fsl_readl(&dr_regs->usbcmd);
1455                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1456
1457                 /* Copy the setup packet to local buffer */
1458                 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1459         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1460
1461         /* Clear Setup Tripwire */
1462         temp = fsl_readl(&dr_regs->usbcmd);
1463         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1464 }
1465
1466 /* process-ep_req(): free the completed Tds for this req */
1467 static int process_ep_req(struct fsl_udc *udc, int pipe,
1468                 struct fsl_req *curr_req)
1469 {
1470         struct ep_td_struct *curr_td;
1471         int     td_complete, actual, remaining_length, j, tmp;
1472         int     status = 0;
1473         int     errors = 0;
1474         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1475         int direction = pipe % 2;
1476
1477         curr_td = curr_req->head;
1478         td_complete = 0;
1479         actual = curr_req->req.length;
1480
1481         for (j = 0; j < curr_req->dtd_count; j++) {
1482                 remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
1483                                         & DTD_PACKET_SIZE)
1484                                 >> DTD_LENGTH_BIT_POS;
1485                 actual -= remaining_length;
1486
1487                 if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
1488                                                 DTD_ERROR_MASK)) {
1489                         if (errors & DTD_STATUS_HALTED) {
1490                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1491                                 /* Clear the errors and Halt condition */
1492                                 tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
1493                                 tmp &= ~errors;
1494                                 curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
1495                                 status = -EPIPE;
1496                                 /* FIXME: continue with next queued TD? */
1497
1498                                 break;
1499                         }
1500                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1501                                 VDBG("Transfer overflow");
1502                                 status = -EPROTO;
1503                                 break;
1504                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1505                                 VDBG("ISO error");
1506                                 status = -EILSEQ;
1507                                 break;
1508                         } else
1509                                 ERR("Unknown error has occured (0x%x)!\r\n",
1510                                         errors);
1511
1512                 } else if (le32_to_cpu(curr_td->size_ioc_sts)
1513                                 & DTD_STATUS_ACTIVE) {
1514                         VDBG("Request not complete");
1515                         status = REQ_UNCOMPLETE;
1516                         return status;
1517                 } else if (remaining_length) {
1518                         if (direction) {
1519                                 VDBG("Transmit dTD remaining length not zero");
1520                                 status = -EPROTO;
1521                                 break;
1522                         } else {
1523                                 td_complete++;
1524                                 break;
1525                         }
1526                 } else {
1527                         td_complete++;
1528                         VDBG("dTD transmitted successful ");
1529                 }
1530
1531                 if (j != curr_req->dtd_count - 1)
1532                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1533         }
1534
1535         if (status)
1536                 return status;
1537
1538         curr_req->req.actual = actual;
1539
1540         return 0;
1541 }
1542
1543 /* Process a DTD completion interrupt */
1544 static void dtd_complete_irq(struct fsl_udc *udc)
1545 {
1546         u32 bit_pos;
1547         int i, ep_num, direction, bit_mask, status;
1548         struct fsl_ep *curr_ep;
1549         struct fsl_req *curr_req, *temp_req;
1550
1551         /* Clear the bits in the register */
1552         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1553         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1554
1555         if (!bit_pos)
1556                 return;
1557
1558         for (i = 0; i < udc->max_ep * 2; i++) {
1559                 ep_num = i >> 1;
1560                 direction = i % 2;
1561
1562                 bit_mask = 1 << (ep_num + 16 * direction);
1563
1564                 if (!(bit_pos & bit_mask))
1565                         continue;
1566
1567                 curr_ep = get_ep_by_pipe(udc, i);
1568
1569                 /* If the ep is configured */
1570                 if (curr_ep->name == NULL) {
1571                         WARN("Invalid EP?");
1572                         continue;
1573                 }
1574
1575                 /* process the req queue until an uncomplete request */
1576                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1577                                 queue) {
1578                         status = process_ep_req(udc, i, curr_req);
1579
1580                         VDBG("status of process_ep_req= %d, ep = %d",
1581                                         status, ep_num);
1582                         if (status == REQ_UNCOMPLETE)
1583                                 break;
1584                         /* write back status to req */
1585                         curr_req->req.status = status;
1586
1587                         if (ep_num == 0) {
1588                                 ep0_req_complete(udc, curr_ep, curr_req);
1589                                 break;
1590                         } else
1591                                 done(curr_ep, curr_req, status);
1592                 }
1593         }
1594 }
1595
1596 /* Process a port change interrupt */
1597 static void port_change_irq(struct fsl_udc *udc)
1598 {
1599         u32 speed;
1600
1601         if (udc->bus_reset)
1602                 udc->bus_reset = 0;
1603
1604         /* Bus resetting is finished */
1605         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
1606                 /* Get the speed */
1607                 speed = (fsl_readl(&dr_regs->portsc1)
1608                                 & PORTSCX_PORT_SPEED_MASK);
1609                 switch (speed) {
1610                 case PORTSCX_PORT_SPEED_HIGH:
1611                         udc->gadget.speed = USB_SPEED_HIGH;
1612                         break;
1613                 case PORTSCX_PORT_SPEED_FULL:
1614                         udc->gadget.speed = USB_SPEED_FULL;
1615                         break;
1616                 case PORTSCX_PORT_SPEED_LOW:
1617                         udc->gadget.speed = USB_SPEED_LOW;
1618                         break;
1619                 default:
1620                         udc->gadget.speed = USB_SPEED_UNKNOWN;
1621                         break;
1622                 }
1623         }
1624
1625         /* Update USB state */
1626         if (!udc->resume_state)
1627                 udc->usb_state = USB_STATE_DEFAULT;
1628 }
1629
1630 /* Process suspend interrupt */
1631 static void suspend_irq(struct fsl_udc *udc)
1632 {
1633         udc->resume_state = udc->usb_state;
1634         udc->usb_state = USB_STATE_SUSPENDED;
1635
1636         /* report suspend to the driver, serial.c does not support this */
1637         if (udc->driver->suspend)
1638                 udc->driver->suspend(&udc->gadget);
1639 }
1640
1641 static void bus_resume(struct fsl_udc *udc)
1642 {
1643         udc->usb_state = udc->resume_state;
1644         udc->resume_state = 0;
1645
1646         /* report resume to the driver, serial.c does not support this */
1647         if (udc->driver->resume)
1648                 udc->driver->resume(&udc->gadget);
1649 }
1650
1651 /* Clear up all ep queues */
1652 static int reset_queues(struct fsl_udc *udc)
1653 {
1654         u8 pipe;
1655
1656         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1657                 udc_reset_ep_queue(udc, pipe);
1658
1659         /* report disconnect; the driver is already quiesced */
1660         udc->driver->disconnect(&udc->gadget);
1661
1662         return 0;
1663 }
1664
1665 /* Process reset interrupt */
1666 static void reset_irq(struct fsl_udc *udc)
1667 {
1668         u32 temp;
1669         unsigned long timeout;
1670
1671         /* Clear the device address */
1672         temp = fsl_readl(&dr_regs->deviceaddr);
1673         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1674
1675         udc->device_address = 0;
1676
1677         /* Clear usb state */
1678         udc->resume_state = 0;
1679         udc->ep0_dir = 0;
1680         udc->ep0_state = WAIT_FOR_SETUP;
1681         udc->remote_wakeup = 0; /* default to 0 on reset */
1682         udc->gadget.b_hnp_enable = 0;
1683         udc->gadget.a_hnp_support = 0;
1684         udc->gadget.a_alt_hnp_support = 0;
1685
1686         /* Clear all the setup token semaphores */
1687         temp = fsl_readl(&dr_regs->endptsetupstat);
1688         fsl_writel(temp, &dr_regs->endptsetupstat);
1689
1690         /* Clear all the endpoint complete status bits */
1691         temp = fsl_readl(&dr_regs->endptcomplete);
1692         fsl_writel(temp, &dr_regs->endptcomplete);
1693
1694         timeout = jiffies + 100;
1695         while (fsl_readl(&dr_regs->endpointprime)) {
1696                 /* Wait until all endptprime bits cleared */
1697                 if (time_after(jiffies, timeout)) {
1698                         ERR("Timeout for reset\n");
1699                         break;
1700                 }
1701                 cpu_relax();
1702         }
1703
1704         /* Write 1s to the flush register */
1705         fsl_writel(0xffffffff, &dr_regs->endptflush);
1706
1707         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1708                 VDBG("Bus reset");
1709                 /* Bus is reseting */
1710                 udc->bus_reset = 1;
1711                 /* Reset all the queues, include XD, dTD, EP queue
1712                  * head and TR Queue */
1713                 reset_queues(udc);
1714                 udc->usb_state = USB_STATE_DEFAULT;
1715         } else {
1716                 VDBG("Controller reset");
1717                 /* initialize usb hw reg except for regs for EP, not
1718                  * touch usbintr reg */
1719                 dr_controller_setup(udc);
1720
1721                 /* Reset all internal used Queues */
1722                 reset_queues(udc);
1723
1724                 ep0_setup(udc);
1725
1726                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1727                 dr_controller_run(udc);
1728                 udc->usb_state = USB_STATE_ATTACHED;
1729         }
1730 }
1731
1732 /*
1733  * USB device controller interrupt handler
1734  */
1735 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1736 {
1737         struct fsl_udc *udc = _udc;
1738         u32 irq_src;
1739         irqreturn_t status = IRQ_NONE;
1740         unsigned long flags;
1741
1742         /* Disable ISR for OTG host mode */
1743         if (udc->stopped)
1744                 return IRQ_NONE;
1745         spin_lock_irqsave(&udc->lock, flags);
1746         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1747         /* Clear notification bits */
1748         fsl_writel(irq_src, &dr_regs->usbsts);
1749
1750         /* VDBG("irq_src [0x%8x]", irq_src); */
1751
1752         /* Need to resume? */
1753         if (udc->usb_state == USB_STATE_SUSPENDED)
1754                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1755                         bus_resume(udc);
1756
1757         /* USB Interrupt */
1758         if (irq_src & USB_STS_INT) {
1759                 VDBG("Packet int");
1760                 /* Setup package, we only support ep0 as control ep */
1761                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1762                         tripwire_handler(udc, 0,
1763                                         (u8 *) (&udc->local_setup_buff));
1764                         setup_received_irq(udc, &udc->local_setup_buff);
1765                         status = IRQ_HANDLED;
1766                 }
1767
1768                 /* completion of dtd */
1769                 if (fsl_readl(&dr_regs->endptcomplete)) {
1770                         dtd_complete_irq(udc);
1771                         status = IRQ_HANDLED;
1772                 }
1773         }
1774
1775         /* SOF (for ISO transfer) */
1776         if (irq_src & USB_STS_SOF) {
1777                 status = IRQ_HANDLED;
1778         }
1779
1780         /* Port Change */
1781         if (irq_src & USB_STS_PORT_CHANGE) {
1782                 port_change_irq(udc);
1783                 status = IRQ_HANDLED;
1784         }
1785
1786         /* Reset Received */
1787         if (irq_src & USB_STS_RESET) {
1788                 reset_irq(udc);
1789                 status = IRQ_HANDLED;
1790         }
1791
1792         /* Sleep Enable (Suspend) */
1793         if (irq_src & USB_STS_SUSPEND) {
1794                 suspend_irq(udc);
1795                 status = IRQ_HANDLED;
1796         }
1797
1798         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1799                 VDBG("Error IRQ %x ", irq_src);
1800         }
1801
1802         spin_unlock_irqrestore(&udc->lock, flags);
1803         return status;
1804 }
1805
1806 /*----------------------------------------------------------------*
1807  * Hook to gadget drivers
1808  * Called by initialization code of gadget drivers
1809 *----------------------------------------------------------------*/
1810 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1811 {
1812         int retval = -ENODEV;
1813         unsigned long flags = 0;
1814
1815         if (!udc_controller)
1816                 return -ENODEV;
1817
1818         if (!driver || (driver->speed != USB_SPEED_FULL
1819                                 && driver->speed != USB_SPEED_HIGH)
1820                         || !driver->bind || !driver->disconnect
1821                         || !driver->setup)
1822                 return -EINVAL;
1823
1824         if (udc_controller->driver)
1825                 return -EBUSY;
1826
1827         /* lock is needed but whether should use this lock or another */
1828         spin_lock_irqsave(&udc_controller->lock, flags);
1829
1830         driver->driver.bus = 0;
1831         /* hook up the driver */
1832         udc_controller->driver = driver;
1833         udc_controller->gadget.dev.driver = &driver->driver;
1834         spin_unlock_irqrestore(&udc_controller->lock, flags);
1835
1836         /* bind udc driver to gadget driver */
1837         retval = driver->bind(&udc_controller->gadget);
1838         if (retval) {
1839                 VDBG("bind to %s --> %d", driver->driver.name, retval);
1840                 udc_controller->gadget.dev.driver = 0;
1841                 udc_controller->driver = 0;
1842                 goto out;
1843         }
1844
1845         /* Enable DR IRQ reg and Set usbcmd reg  Run bit */
1846         dr_controller_run(udc_controller);
1847         udc_controller->usb_state = USB_STATE_ATTACHED;
1848         udc_controller->ep0_state = WAIT_FOR_SETUP;
1849         udc_controller->ep0_dir = 0;
1850         printk(KERN_INFO "%s: bind to driver %s \n",
1851                         udc_controller->gadget.name, driver->driver.name);
1852
1853 out:
1854         if (retval)
1855                 printk("retval %d \n", retval);
1856         return retval;
1857 }
1858 EXPORT_SYMBOL(usb_gadget_register_driver);
1859
1860 /* Disconnect from gadget driver */
1861 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1862 {
1863         struct fsl_ep *loop_ep;
1864         unsigned long flags;
1865
1866         if (!udc_controller)
1867                 return -ENODEV;
1868
1869         if (!driver || driver != udc_controller->driver || !driver->unbind)
1870                 return -EINVAL;
1871
1872 #ifdef CONFIG_USB_OTG
1873         if (udc_controller->transceiver)
1874                 (void)otg_set_peripheral(udc_controller->transceiver, 0);
1875 #endif
1876
1877         /* stop DR, disable intr */
1878         dr_controller_stop(udc_controller);
1879
1880         /* in fact, no needed */
1881         udc_controller->usb_state = USB_STATE_ATTACHED;
1882         udc_controller->ep0_state = WAIT_FOR_SETUP;
1883         udc_controller->ep0_dir = 0;
1884
1885         /* stand operation */
1886         spin_lock_irqsave(&udc_controller->lock, flags);
1887         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1888         nuke(&udc_controller->eps[0], -ESHUTDOWN);
1889         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1890                         ep.ep_list)
1891                 nuke(loop_ep, -ESHUTDOWN);
1892         spin_unlock_irqrestore(&udc_controller->lock, flags);
1893
1894         /* unbind gadget and unhook driver. */
1895         driver->unbind(&udc_controller->gadget);
1896         udc_controller->gadget.dev.driver = 0;
1897         udc_controller->driver = 0;
1898
1899         printk("unregistered gadget driver '%s'\r\n", driver->driver.name);
1900         return 0;
1901 }
1902 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1903
1904 /*-------------------------------------------------------------------------
1905                 PROC File System Support
1906 -------------------------------------------------------------------------*/
1907 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1908
1909 #include <linux/seq_file.h>
1910
1911 static const char proc_filename[] = "driver/fsl_usb2_udc";
1912
1913 static int fsl_proc_read(char *page, char **start, off_t off, int count,
1914                 int *eof, void *_dev)
1915 {
1916         char *buf = page;
1917         char *next = buf;
1918         unsigned size = count;
1919         unsigned long flags;
1920         int t, i;
1921         u32 tmp_reg;
1922         struct fsl_ep *ep = NULL;
1923         struct fsl_req *req;
1924
1925         struct fsl_udc *udc = udc_controller;
1926         if (off != 0)
1927                 return 0;
1928
1929         spin_lock_irqsave(&udc->lock, flags);
1930
1931         /* ------basic driver infomation ---- */
1932         t = scnprintf(next, size,
1933                         DRIVER_DESC "\n"
1934                         "%s version: %s\n"
1935                         "Gadget driver: %s\n\n",
1936                         driver_name, DRIVER_VERSION,
1937                         udc->driver ? udc->driver->driver.name : "(none)");
1938         size -= t;
1939         next += t;
1940
1941         /* ------ DR Registers ----- */
1942         tmp_reg = fsl_readl(&dr_regs->usbcmd);
1943         t = scnprintf(next, size,
1944                         "USBCMD reg:\n"
1945                         "SetupTW: %d\n"
1946                         "Run/Stop: %s\n\n",
1947                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
1948                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
1949         size -= t;
1950         next += t;
1951
1952         tmp_reg = fsl_readl(&dr_regs->usbsts);
1953         t = scnprintf(next, size,
1954                         "USB Status Reg:\n"
1955                         "Dr Suspend: %d" "Reset Received: %d" "System Error: %s"
1956                         "USB Error Interrupt: %s\n\n",
1957                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
1958                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
1959                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
1960                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
1961         size -= t;
1962         next += t;
1963
1964         tmp_reg = fsl_readl(&dr_regs->usbintr);
1965         t = scnprintf(next, size,
1966                         "USB Intrrupt Enable Reg:\n"
1967                         "Sleep Enable: %d" "SOF Received Enable: %d"
1968                         "Reset Enable: %d\n"
1969                         "System Error Enable: %d"
1970                         "Port Change Dectected Enable: %d\n"
1971                         "USB Error Intr Enable: %d" "USB Intr Enable: %d\n\n",
1972                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
1973                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
1974                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
1975                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
1976                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
1977                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
1978                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
1979         size -= t;
1980         next += t;
1981
1982         tmp_reg = fsl_readl(&dr_regs->frindex);
1983         t = scnprintf(next, size,
1984                         "USB Frame Index Reg:" "Frame Number is 0x%x\n\n",
1985                         (tmp_reg & USB_FRINDEX_MASKS));
1986         size -= t;
1987         next += t;
1988
1989         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
1990         t = scnprintf(next, size,
1991                         "USB Device Address Reg:" "Device Addr is 0x%x\n\n",
1992                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
1993         size -= t;
1994         next += t;
1995
1996         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
1997         t = scnprintf(next, size,
1998                         "USB Endpoint List Address Reg:"
1999                         "Device Addr is 0x%x\n\n",
2000                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2001         size -= t;
2002         next += t;
2003
2004         tmp_reg = fsl_readl(&dr_regs->portsc1);
2005         t = scnprintf(next, size,
2006                 "USB Port Status&Control Reg:\n"
2007                 "Port Transceiver Type : %s" "Port Speed: %s \n"
2008                 "PHY Low Power Suspend: %s" "Port Reset: %s"
2009                 "Port Suspend Mode: %s \n" "Over-current Change: %s"
2010                 "Port Enable/Disable Change: %s\n"
2011                 "Port Enabled/Disabled: %s"
2012                 "Current Connect Status: %s\n\n", ( {
2013                         char *s;
2014                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
2015                         case PORTSCX_PTS_UTMI:
2016                                 s = "UTMI"; break;
2017                         case PORTSCX_PTS_ULPI:
2018                                 s = "ULPI "; break;
2019                         case PORTSCX_PTS_FSLS:
2020                                 s = "FS/LS Serial"; break;
2021                         default:
2022                                 s = "None"; break;
2023                         }
2024                         s;} ), ( {
2025                         char *s;
2026                         switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
2027                         case PORTSCX_PORT_SPEED_FULL:
2028                                 s = "Full Speed"; break;
2029                         case PORTSCX_PORT_SPEED_LOW:
2030                                 s = "Low Speed"; break;
2031                         case PORTSCX_PORT_SPEED_HIGH:
2032                                 s = "High Speed"; break;
2033                         default:
2034                                 s = "Undefined"; break;
2035                         }
2036                         s;
2037                 } ),
2038                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2039                 "Normal PHY mode" : "Low power mode",
2040                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2041                 "Not in Reset",
2042                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2043                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2044                 "No",
2045                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2046                 "Not change",
2047                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2048                 "Not correct",
2049                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2050                 "Attached" : "Not-Att");
2051         size -= t;
2052         next += t;
2053
2054         tmp_reg = fsl_readl(&dr_regs->usbmode);
2055         t = scnprintf(next, size,
2056                         "USB Mode Reg:" "Controller Mode is : %s\n\n", ( {
2057                                 char *s;
2058                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2059                                 case USB_MODE_CTRL_MODE_IDLE:
2060                                         s = "Idle"; break;
2061                                 case USB_MODE_CTRL_MODE_DEVICE:
2062                                         s = "Device Controller"; break;
2063                                 case USB_MODE_CTRL_MODE_HOST:
2064                                         s = "Host Controller"; break;
2065                                 default:
2066                                         s = "None"; break;
2067                                 }
2068                                 s;
2069                         } ));
2070         size -= t;
2071         next += t;
2072
2073         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2074         t = scnprintf(next, size,
2075                         "Endpoint Setup Status Reg:" "SETUP on ep 0x%x\n\n",
2076                         (tmp_reg & EP_SETUP_STATUS_MASK));
2077         size -= t;
2078         next += t;
2079
2080         for (i = 0; i < udc->max_ep / 2; i++) {
2081                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2082                 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2083                                 i, tmp_reg);
2084                 size -= t;
2085                 next += t;
2086         }
2087         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2088         t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n", tmp_reg);
2089         size -= t;
2090         next += t;
2091
2092         tmp_reg = usb_sys_regs->snoop1;
2093         t = scnprintf(next, size, "\nSnoop1 Reg : = [0x%x]\n\n", tmp_reg);
2094         size -= t;
2095         next += t;
2096
2097         tmp_reg = usb_sys_regs->control;
2098         t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2099                         tmp_reg);
2100         size -= t;
2101         next += t;
2102
2103         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2104         ep = &udc->eps[0];
2105         t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2106                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2107         size -= t;
2108         next += t;
2109
2110         if (list_empty(&ep->queue)) {
2111                 t = scnprintf(next, size, "its req queue is empty\n\n");
2112                 size -= t;
2113                 next += t;
2114         } else {
2115                 list_for_each_entry(req, &ep->queue, queue) {
2116                         t = scnprintf(next, size,
2117                                 "req %p actual 0x%x length 0x%x  buf %p\n",
2118                                 &req->req, req->req.actual,
2119                                 req->req.length, req->req.buf);
2120                         size -= t;
2121                         next += t;
2122                 }
2123         }
2124         /* other gadget->eplist ep */
2125         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2126                 if (ep->desc) {
2127                         t = scnprintf(next, size,
2128                                         "\nFor %s Maxpkt is 0x%x "
2129                                         "index is 0x%x\n",
2130                                         ep->ep.name, ep_maxpacket(ep),
2131                                         ep_index(ep));
2132                         size -= t;
2133                         next += t;
2134
2135                         if (list_empty(&ep->queue)) {
2136                                 t = scnprintf(next, size,
2137                                                 "its req queue is empty\n\n");
2138                                 size -= t;
2139                                 next += t;
2140                         } else {
2141                                 list_for_each_entry(req, &ep->queue, queue) {
2142                                         t = scnprintf(next, size,
2143                                                 "req %p actual 0x%x length"
2144                                                 "0x%x  buf %p\n",
2145                                                 &req->req, req->req.actual,
2146                                                 req->req.length, req->req.buf);
2147                                         size -= t;
2148                                         next += t;
2149                                         }       /* end for each_entry of ep req */
2150                                 }       /* end for else */
2151                         }       /* end for if(ep->queue) */
2152                 }               /* end (ep->desc) */
2153
2154         spin_unlock_irqrestore(&udc->lock, flags);
2155
2156         *eof = 1;
2157         return count - size;
2158 }
2159
2160 #define create_proc_file()      create_proc_read_entry(proc_filename, \
2161                                 0, NULL, fsl_proc_read, NULL)
2162
2163 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2164
2165 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2166
2167 #define create_proc_file()      do {} while (0)
2168 #define remove_proc_file()      do {} while (0)
2169
2170 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2171
2172 /*-------------------------------------------------------------------------*/
2173
2174 /* Release udc structures */
2175 static void fsl_udc_release(struct device *dev)
2176 {
2177         complete(udc_controller->done);
2178         dma_free_coherent(dev, udc_controller->ep_qh_size,
2179                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2180         kfree(udc_controller);
2181 }
2182
2183 /******************************************************************
2184         Internal structure setup functions
2185 *******************************************************************/
2186 /*------------------------------------------------------------------
2187  * init resource for globle controller
2188  * Return the udc handle on success or NULL on failure
2189  ------------------------------------------------------------------*/
2190 static struct fsl_udc *__init struct_udc_setup(struct platform_device *pdev)
2191 {
2192         struct fsl_udc *udc;
2193         struct fsl_usb2_platform_data *pdata;
2194         size_t size;
2195
2196         udc = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2197         if (udc == NULL) {
2198                 ERR("malloc udc failed\n");
2199                 return NULL;
2200         }
2201
2202         pdata = pdev->dev.platform_data;
2203         udc->phy_mode = pdata->phy_mode;
2204         /* max_ep_nr is bidirectional ep number, max_ep doubles the number */
2205         udc->max_ep = pdata->max_ep_nr * 2;
2206
2207         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2208         if (!udc->eps) {
2209                 ERR("malloc fsl_ep failed\n");
2210                 goto cleanup;
2211         }
2212
2213         /* initialized QHs, take care of alignment */
2214         size = udc->max_ep * sizeof(struct ep_queue_head);
2215         if (size < QH_ALIGNMENT)
2216                 size = QH_ALIGNMENT;
2217         else if ((size % QH_ALIGNMENT) != 0) {
2218                 size += QH_ALIGNMENT + 1;
2219                 size &= ~(QH_ALIGNMENT - 1);
2220         }
2221         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2222                                         &udc->ep_qh_dma, GFP_KERNEL);
2223         if (!udc->ep_qh) {
2224                 ERR("malloc QHs for udc failed\n");
2225                 kfree(udc->eps);
2226                 goto cleanup;
2227         }
2228
2229         udc->ep_qh_size = size;
2230
2231         /* Initialize ep0 status request structure */
2232         /* FIXME: fsl_alloc_request() ignores ep argument */
2233         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2234                         struct fsl_req, req);
2235         /* allocate a small amount of memory to get valid address */
2236         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2237         udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
2238
2239         udc->resume_state = USB_STATE_NOTATTACHED;
2240         udc->usb_state = USB_STATE_POWERED;
2241         udc->ep0_dir = 0;
2242         udc->remote_wakeup = 0; /* default to 0 on reset */
2243         spin_lock_init(&udc->lock);
2244
2245         return udc;
2246
2247 cleanup:
2248         kfree(udc);
2249         return NULL;
2250 }
2251
2252 /*----------------------------------------------------------------
2253  * Setup the fsl_ep struct for eps
2254  * Link fsl_ep->ep to gadget->ep_list
2255  * ep0out is not used so do nothing here
2256  * ep0in should be taken care
2257  *--------------------------------------------------------------*/
2258 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2259                 char *name, int link)
2260 {
2261         struct fsl_ep *ep = &udc->eps[index];
2262
2263         ep->udc = udc;
2264         strcpy(ep->name, name);
2265         ep->ep.name = ep->name;
2266
2267         ep->ep.ops = &fsl_ep_ops;
2268         ep->stopped = 0;
2269
2270         /* for ep0: maxP defined in desc
2271          * for other eps, maxP is set by epautoconfig() called by gadget layer
2272          */
2273         ep->ep.maxpacket = (unsigned short) ~0;
2274
2275         /* the queue lists any req for this ep */
2276         INIT_LIST_HEAD(&ep->queue);
2277
2278         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2279         if (link)
2280                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2281         ep->gadget = &udc->gadget;
2282         ep->qh = &udc->ep_qh[index];
2283
2284         return 0;
2285 }
2286
2287 /* Driver probe function
2288  * all intialize operations implemented here except enabling usb_intr reg
2289  */
2290 static int __init fsl_udc_probe(struct platform_device *pdev)
2291 {
2292         struct resource *res;
2293         int ret = -ENODEV;
2294         unsigned int i;
2295
2296         if (strcmp(pdev->name, driver_name)) {
2297                 VDBG("Wrong device\n");
2298                 return -ENODEV;
2299         }
2300
2301         /* board setup should have been done in the platform code */
2302
2303         /* Initialize the udc structure including QH member and other member */
2304         udc_controller = struct_udc_setup(pdev);
2305         if (!udc_controller) {
2306                 VDBG("udc_controller is NULL \n");
2307                 return -ENOMEM;
2308         }
2309
2310         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2311         if (!res)
2312                 return -ENXIO;
2313
2314         if (!request_mem_region(res->start, res->end - res->start + 1,
2315                                 driver_name)) {
2316                 ERR("request mem region for %s failed \n", pdev->name);
2317                 return -EBUSY;
2318         }
2319
2320         dr_regs = ioremap(res->start, res->end - res->start + 1);
2321         if (!dr_regs) {
2322                 ret = -ENOMEM;
2323                 goto err1;
2324         }
2325
2326         usb_sys_regs = (struct usb_sys_interface *)
2327                         ((u32)dr_regs + USB_DR_SYS_OFFSET);
2328
2329         udc_controller->irq = platform_get_irq(pdev, 0);
2330         if (!udc_controller->irq) {
2331                 ret = -ENODEV;
2332                 goto err2;
2333         }
2334
2335         ret = request_irq(udc_controller->irq, fsl_udc_irq, SA_SHIRQ,
2336                         driver_name, udc_controller);
2337         if (ret != 0) {
2338                 ERR("cannot request irq %d err %d \n",
2339                                 udc_controller->irq, ret);
2340                 goto err2;
2341         }
2342
2343         /* initialize usb hw reg except for regs for EP,
2344          * leave usbintr reg untouched */
2345         dr_controller_setup(udc_controller);
2346
2347         /* Setup gadget structure */
2348         udc_controller->gadget.ops = &fsl_gadget_ops;
2349         udc_controller->gadget.is_dualspeed = 1;
2350         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2351         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2352         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2353         udc_controller->gadget.name = driver_name;
2354
2355         /* Setup gadget.dev and register with kernel */
2356         strcpy(udc_controller->gadget.dev.bus_id, "gadget");
2357         udc_controller->gadget.dev.release = fsl_udc_release;
2358         udc_controller->gadget.dev.parent = &pdev->dev;
2359         ret = device_register(&udc_controller->gadget.dev);
2360         if (ret < 0)
2361                 goto err3;
2362
2363         /* setup QH and epctrl for ep0 */
2364         ep0_setup(udc_controller);
2365
2366         /* setup udc->eps[] for ep0 */
2367         struct_ep_setup(udc_controller, 0, "ep0", 0);
2368         /* for ep0: the desc defined here;
2369          * for other eps, gadget layer called ep_enable with defined desc
2370          */
2371         udc_controller->eps[0].desc = &fsl_ep0_desc;
2372         udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2373
2374         /* setup the udc->eps[] for non-control endpoints and link
2375          * to gadget.ep_list */
2376         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2377                 char name[14];
2378
2379                 sprintf(name, "ep%dout", i);
2380                 struct_ep_setup(udc_controller, i * 2, name, 1);
2381                 sprintf(name, "ep%din", i);
2382                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2383         }
2384
2385         /* use dma_pool for TD management */
2386         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2387                         sizeof(struct ep_td_struct),
2388                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2389         if (udc_controller->td_pool == NULL) {
2390                 ret = -ENOMEM;
2391                 goto err4;
2392         }
2393         create_proc_file();
2394         return 0;
2395
2396 err4:
2397         device_unregister(&udc_controller->gadget.dev);
2398 err3:
2399         free_irq(udc_controller->irq, udc_controller);
2400 err2:
2401         iounmap(dr_regs);
2402 err1:
2403         release_mem_region(res->start, res->end - res->start + 1);
2404         return ret;
2405 }
2406
2407 /* Driver removal function
2408  * Free resources and finish pending transactions
2409  */
2410 static int __exit fsl_udc_remove(struct platform_device *pdev)
2411 {
2412         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2413
2414         DECLARE_COMPLETION(done);
2415
2416         if (!udc_controller)
2417                 return -ENODEV;
2418         udc_controller->done = &done;
2419
2420         /* DR has been stopped in usb_gadget_unregister_driver() */
2421         remove_proc_file();
2422
2423         /* Free allocated memory */
2424         kfree(udc_controller->status_req->req.buf);
2425         kfree(udc_controller->status_req);
2426         kfree(udc_controller->eps);
2427
2428         dma_pool_destroy(udc_controller->td_pool);
2429         free_irq(udc_controller->irq, udc_controller);
2430         iounmap(dr_regs);
2431         release_mem_region(res->start, res->end - res->start + 1);
2432
2433         device_unregister(&udc_controller->gadget.dev);
2434         /* free udc --wait for the release() finished */
2435         wait_for_completion(&done);
2436
2437         return 0;
2438 }
2439
2440 /*-----------------------------------------------------------------
2441  * Modify Power management attributes
2442  * Used by OTG statemachine to disable gadget temporarily
2443  -----------------------------------------------------------------*/
2444 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2445 {
2446         dr_controller_stop(udc_controller);
2447         return 0;
2448 }
2449
2450 /*-----------------------------------------------------------------
2451  * Invoked on USB resume. May be called in_interrupt.
2452  * Here we start the DR controller and enable the irq
2453  *-----------------------------------------------------------------*/
2454 static int fsl_udc_resume(struct platform_device *pdev)
2455 {
2456         /* Enable DR irq reg and set controller Run */
2457         if (udc_controller->stopped) {
2458                 dr_controller_setup(udc_controller);
2459                 dr_controller_run(udc_controller);
2460         }
2461         udc_controller->usb_state = USB_STATE_ATTACHED;
2462         udc_controller->ep0_state = WAIT_FOR_SETUP;
2463         udc_controller->ep0_dir = 0;
2464         return 0;
2465 }
2466
2467 /*-------------------------------------------------------------------------
2468         Register entry point for the peripheral controller driver
2469 --------------------------------------------------------------------------*/
2470
2471 static struct platform_driver udc_driver = {
2472         .remove  = __exit_p(fsl_udc_remove),
2473         /* these suspend and resume are not usb suspend and resume */
2474         .suspend = fsl_udc_suspend,
2475         .resume  = fsl_udc_resume,
2476         .driver  = {
2477                 .name = (char *)driver_name,
2478                 .owner = THIS_MODULE,
2479         },
2480 };
2481
2482 static int __init udc_init(void)
2483 {
2484         printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2485         return platform_driver_probe(&udc_driver, fsl_udc_probe);
2486 }
2487
2488 module_init(udc_init);
2489
2490 static void __exit udc_exit(void)
2491 {
2492         platform_driver_unregister(&udc_driver);
2493         printk("%s unregistered \n", driver_desc);
2494 }
2495
2496 module_exit(udc_exit);
2497
2498 MODULE_DESCRIPTION(DRIVER_DESC);
2499 MODULE_AUTHOR(DRIVER_AUTHOR);
2500 MODULE_LICENSE("GPL");