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                 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 | PORTSCX_PORT_WIDTH);
 232         switch (udc->phy_mode) {
 233         case FSL_USB2_PHY_ULPI:
 234                 portctrl |= PORTSCX_PTS_ULPI;
 235                 break;
 236         case FSL_USB2_PHY_UTMI_WIDE:
 237                 portctrl |= PORTSCX_PTW_16BIT;
 238                 /* fall through */
 239         case FSL_USB2_PHY_UTMI:
 240                 portctrl |= PORTSCX_PTS_UTMI;
 241                 break;
 242         case FSL_USB2_PHY_SERIAL:
 243                 portctrl |= PORTSCX_PTS_FSLS;
 244                 break;
 245         default:
 246                 return -EINVAL;
 247         }
 248         fsl_writel(portctrl, &dr_regs->portsc1);
 249
 250         /* Config control enable i/o output, cpu endian register */
 251         ctrl = __raw_readl(&usb_sys_regs->control);
 252         ctrl |= USB_CTRL_IOENB;
 253         __raw_writel(ctrl, &usb_sys_regs->control);
 254
 255 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 256         /* Turn on cache snooping hardware, since some PowerPC platforms
 257          * wholly rely on hardware to deal with cache coherent. */
 258
 259         /* Setup Snooping for all the 4GB space */
 260         tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
 261         __raw_writel(tmp, &usb_sys_regs->snoop1);
 262         tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
 263         __raw_writel(tmp, &usb_sys_regs->snoop2);
 264 #endif
 265
 266         return 0;
 267 }
 268
 269 /* Enable DR irq and set controller to run state */
 270 static void dr_controller_run(struct fsl_udc *udc)
 271 {
 272         u32 temp;
 273
 274         /* Enable DR irq reg */
 275         temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
 276                 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
 277                 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
 278
 279         fsl_writel(temp, &dr_regs->usbintr);
 280
 281         /* Clear stopped bit */
 282         udc->stopped = 0;
 283
 284         /* Set the controller as device mode */
 285         temp = fsl_readl(&dr_regs->usbmode);
 286         temp |= USB_MODE_CTRL_MODE_DEVICE;
 287         fsl_writel(temp, &dr_regs->usbmode);
 288
 289         /* Set controller to Run */
 290         temp = fsl_readl(&dr_regs->usbcmd);
 291         temp |= USB_CMD_RUN_STOP;
 292         fsl_writel(temp, &dr_regs->usbcmd);
 293
 294         return;
 295 }
 296
 297 static void dr_controller_stop(struct fsl_udc *udc)
 298 {
 299         unsigned int tmp;
 300
 301         /* disable all INTR */
 302         fsl_writel(0, &dr_regs->usbintr);
 303
 304         /* Set stopped bit for isr */
 305         udc->stopped = 1;
 306
 307         /* disable IO output */
 308 /*      usb_sys_regs->control = 0; */
 309
 310         /* set controller to Stop */
 311         tmp = fsl_readl(&dr_regs->usbcmd);
 312         tmp &= ~USB_CMD_RUN_STOP;
 313         fsl_writel(tmp, &dr_regs->usbcmd);
 314
 315         return;
 316 }
 317
 318 void dr_ep_setup(unsigned char ep_num, unsigned char dir, unsigned char ep_type)
 319 {
 320         unsigned int tmp_epctrl = 0;
 321
 322         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 323         if (dir) {
 324                 if (ep_num)
 325                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 326                 tmp_epctrl |= EPCTRL_TX_ENABLE;
 327                 tmp_epctrl |= ((unsigned int)(ep_type)
 328                                 << EPCTRL_TX_EP_TYPE_SHIFT);
 329         } else {
 330                 if (ep_num)
 331                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 332                 tmp_epctrl |= EPCTRL_RX_ENABLE;
 333                 tmp_epctrl |= ((unsigned int)(ep_type)
 334                                 << EPCTRL_RX_EP_TYPE_SHIFT);
 335         }
 336
 337         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 338 }
 339
 340 static void
 341 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
 342 {
 343         u32 tmp_epctrl = 0;
 344
 345         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 346
 347         if (value) {
 348                 /* set the stall bit */
 349                 if (dir)
 350                         tmp_epctrl |= EPCTRL_TX_EP_STALL;
 351                 else
 352                         tmp_epctrl |= EPCTRL_RX_EP_STALL;
 353         } else {
 354                 /* clear the stall bit and reset data toggle */
 355                 if (dir) {
 356                         tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
 357                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 358                 } else {
 359                         tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
 360                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 361                 }
 362         }
 363         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 364 }
 365
 366 /* Get stall status of a specific ep
 367    Return: 0: not stalled; 1:stalled */
 368 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
 369 {
 370         u32 epctrl;
 371
 372         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 373         if (dir)
 374                 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
 375         else
 376                 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
 377 }
 378
 379 /********************************************************************
 380         Internal Structure Build up functions
 381 ********************************************************************/
 382
 383 /*------------------------------------------------------------------
 384 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
 385  * @zlt: Zero Length Termination Select (1: disable; 0: enable)
 386  * @mult: Mult field
 387  ------------------------------------------------------------------*/
 388 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
 389                 unsigned char dir, unsigned char ep_type,
 390                 unsigned int max_pkt_len,
 391                 unsigned int zlt, unsigned char mult)
 392 {
 393         struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
 394         unsigned int tmp = 0;
 395
 396         /* set the Endpoint Capabilites in QH */
 397         switch (ep_type) {
 398         case USB_ENDPOINT_XFER_CONTROL:
 399                 /* Interrupt On Setup (IOS). for control ep  */
 400                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 401                         | EP_QUEUE_HEAD_IOS;
 402                 break;
 403         case USB_ENDPOINT_XFER_ISOC:
 404                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 405                         | (mult << EP_QUEUE_HEAD_MULT_POS);
 406                 break;
 407         case USB_ENDPOINT_XFER_BULK:
 408         case USB_ENDPOINT_XFER_INT:
 409                 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
 410                 break;
 411         default:
 412                 VDBG("error ep type is %d", ep_type);
 413                 return;
 414         }
 415         if (zlt)
 416                 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
 417         p_QH->max_pkt_length = cpu_to_le32(tmp);
 418
 419         return;
 420 }
 421
 422 /* Setup qh structure and ep register for ep0. */
 423 static void ep0_setup(struct fsl_udc *udc)
 424 {
 425         /* the intialization of an ep includes: fields in QH, Regs,
 426          * fsl_ep struct */
 427         struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
 428                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 429         struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
 430                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 431         dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
 432         dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
 433
 434         return;
 435
 436 }
 437
 438 /***********************************************************************
 439                 Endpoint Management Functions
 440 ***********************************************************************/
 441
 442 /*-------------------------------------------------------------------------
 443  * when configurations are set, or when interface settings change
 444  * for example the do_set_interface() in gadget layer,
 445  * the driver will enable or disable the relevant endpoints
 446  * ep0 doesn't use this routine. It is always enabled.
 447 -------------------------------------------------------------------------*/
 448 static int fsl_ep_enable(struct usb_ep *_ep,
 449                 const struct usb_endpoint_descriptor *desc)
 450 {
 451         struct fsl_udc *udc = NULL;
 452         struct fsl_ep *ep = NULL;
 453         unsigned short max = 0;
 454         unsigned char mult = 0, zlt;
 455         int retval = -EINVAL;
 456         unsigned long flags = 0;
 457
 458         ep = container_of(_ep, struct fsl_ep, ep);
 459
 460         /* catch various bogus parameters */
 461         if (!_ep || !desc || ep->desc
 462                         || (desc->bDescriptorType != USB_DT_ENDPOINT))
 463                 return -EINVAL;
 464
 465         udc = ep->udc;
 466
 467         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
 468                 return -ESHUTDOWN;
 469
 470         max = le16_to_cpu(desc->wMaxPacketSize);
 471
 472         /* Disable automatic zlp generation.  Driver is reponsible to indicate
 473          * explicitly through req->req.zero.  This is needed to enable multi-td
 474          * request. */
 475         zlt = 1;
 476
 477         /* Assume the max packet size from gadget is always correct */
 478         switch (desc->bmAttributes & 0x03) {
 479         case USB_ENDPOINT_XFER_CONTROL:
 480         case USB_ENDPOINT_XFER_BULK:
 481         case USB_ENDPOINT_XFER_INT:
 482                 /* mult = 0.  Execute N Transactions as demonstrated by
 483                  * the USB variable length packet protocol where N is
 484                  * computed using the Maximum Packet Length (dQH) and
 485                  * the Total Bytes field (dTD) */
 486                 mult = 0;
 487                 break;
 488         case USB_ENDPOINT_XFER_ISOC:
 489                 /* Calculate transactions needed for high bandwidth iso */
 490                 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
 491                 max = max & 0x8ff;      /* bit 0~10 */
 492                 /* 3 transactions at most */
 493                 if (mult > 3)
 494                         goto en_done;
 495                 break;
 496         default:
 497                 goto en_done;
 498         }
 499
 500         spin_lock_irqsave(&udc->lock, flags);
 501         ep->ep.maxpacket = max;
 502         ep->desc = desc;
 503         ep->stopped = 0;
 504
 505         /* Controller related setup */
 506         /* Init EPx Queue Head (Ep Capabilites field in QH
 507          * according to max, zlt, mult) */
 508         struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
 509                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 510                                         ?  USB_SEND : USB_RECV),
 511                         (unsigned char) (desc->bmAttributes
 512                                         & USB_ENDPOINT_XFERTYPE_MASK),
 513                         max, zlt, mult);
 514
 515         /* Init endpoint ctrl register */
 516         dr_ep_setup((unsigned char) ep_index(ep),
 517                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 518                                         ? USB_SEND : USB_RECV),
 519                         (unsigned char) (desc->bmAttributes
 520                                         & USB_ENDPOINT_XFERTYPE_MASK));
 521
 522         spin_unlock_irqrestore(&udc->lock, flags);
 523         retval = 0;
 524
 525         VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
 526                         ep->desc->bEndpointAddress & 0x0f,
 527                         (desc->bEndpointAddress & USB_DIR_IN)
 528                                 ? "in" : "out", max);
 529 en_done:
 530         return retval;
 531 }
 532
 533 /*---------------------------------------------------------------------
 534  * @ep : the ep being unconfigured. May not be ep0
 535  * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
 536 *---------------------------------------------------------------------*/
 537 static int fsl_ep_disable(struct usb_ep *_ep)
 538 {
 539         struct fsl_udc *udc = NULL;
 540         struct fsl_ep *ep = NULL;
 541         unsigned long flags = 0;
 542         u32 epctrl;
 543         int ep_num;
 544
 545         ep = container_of(_ep, struct fsl_ep, ep);
 546         if (!_ep || !ep->desc) {
 547                 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
 548                 return -EINVAL;
 549         }
 550
 551         /* disable ep on controller */
 552         ep_num = ep_index(ep);
 553         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 554         if (ep_is_in(ep))
 555                 epctrl &= ~EPCTRL_TX_ENABLE;
 556         else
 557                 epctrl &= ~EPCTRL_RX_ENABLE;
 558         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 559
 560         udc = (struct fsl_udc *)ep->udc;
 561         spin_lock_irqsave(&udc->lock, flags);
 562
 563         /* nuke all pending requests (does flush) */
 564         nuke(ep, -ESHUTDOWN);
 565
 566         ep->desc = 0;
 567         ep->stopped = 1;
 568         spin_unlock_irqrestore(&udc->lock, flags);
 569
 570         VDBG("disabled %s OK", _ep->name);
 571         return 0;
 572 }
 573
 574 /*---------------------------------------------------------------------
 575  * allocate a request object used by this endpoint
 576  * the main operation is to insert the req->queue to the eq->queue
 577  * Returns the request, or null if one could not be allocated
 578 *---------------------------------------------------------------------*/
 579 static struct usb_request *
 580 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
 581 {
 582         struct fsl_req *req = NULL;
 583
 584         req = kzalloc(sizeof *req, gfp_flags);
 585         if (!req)
 586                 return NULL;
 587
 588         req->req.dma = DMA_ADDR_INVALID;
 589         INIT_LIST_HEAD(&req->queue);
 590
 591         return &req->req;
 592 }
 593
 594 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
 595 {
 596         struct fsl_req *req = NULL;
 597
 598         req = container_of(_req, struct fsl_req, req);
 599
 600         if (_req)
 601                 kfree(req);
 602 }
 603
 604 /*-------------------------------------------------------------------------*/
 605 static int fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 606 {
 607         int i = ep_index(ep) * 2 + ep_is_in(ep);
 608         u32 temp, bitmask, tmp_stat;
 609         struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
 610
 611         /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
 612         VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
 613
 614         bitmask = ep_is_in(ep)
 615                 ? (1 << (ep_index(ep) + 16))
 616                 : (1 << (ep_index(ep)));
 617
 618         /* check if the pipe is empty */
 619         if (!(list_empty(&ep->queue))) {
 620                 /* Add td to the end */
 621                 struct fsl_req *lastreq;
 622                 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
 623                 lastreq->tail->next_td_ptr =
 624                         cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
 625                 /* Read prime bit, if 1 goto done */
 626                 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
 627                         goto out;
 628
 629                 do {
 630                         /* Set ATDTW bit in USBCMD */
 631                         temp = fsl_readl(&dr_regs->usbcmd);
 632                         fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
 633
 634                         /* Read correct status bit */
 635                         tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
 636
 637                 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
 638
 639                 /* Write ATDTW bit to 0 */
 640                 temp = fsl_readl(&dr_regs->usbcmd);
 641                 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
 642
 643                 if (tmp_stat)
 644                         goto out;
 645         }
 646
 647         /* Write dQH next pointer and terminate bit to 0 */
 648         temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
 649         dQH->next_dtd_ptr = cpu_to_le32(temp);
 650
 651         /* Clear active and halt bit */
 652         temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
 653                         | EP_QUEUE_HEAD_STATUS_HALT));
 654         dQH->size_ioc_int_sts &= temp;
 655
 656         /* Prime endpoint by writing 1 to ENDPTPRIME */
 657         temp = ep_is_in(ep)
 658                 ? (1 << (ep_index(ep) + 16))
 659                 : (1 << (ep_index(ep)));
 660         fsl_writel(temp, &dr_regs->endpointprime);
 661 out:
 662         return 0;
 663 }
 664
 665 /* Fill in the dTD structure
 666  * @req: request that the transfer belongs to
 667  * @length: return actually data length of the dTD
 668  * @dma: return dma address of the dTD
 669  * @is_last: return flag if it is the last dTD of the request
 670  * return: pointer to the built dTD */
 671 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
 672                 dma_addr_t *dma, int *is_last)
 673 {
 674         u32 swap_temp;
 675         struct ep_td_struct *dtd;
 676
 677         /* how big will this transfer be? */
 678         *length = min(req->req.length - req->req.actual,
 679                         (unsigned)EP_MAX_LENGTH_TRANSFER);
 680
 681         dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
 682         if (dtd == NULL)
 683                 return dtd;
 684
 685         dtd->td_dma = *dma;
 686         /* Clear reserved field */
 687         swap_temp = cpu_to_le32(dtd->size_ioc_sts);
 688         swap_temp &= ~DTD_RESERVED_FIELDS;
 689         dtd->size_ioc_sts = cpu_to_le32(swap_temp);
 690
 691         /* Init all of buffer page pointers */
 692         swap_temp = (u32) (req->req.dma + req->req.actual);
 693         dtd->buff_ptr0 = cpu_to_le32(swap_temp);
 694         dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
 695         dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
 696         dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
 697         dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
 698
 699         req->req.actual += *length;
 700
 701         /* zlp is needed if req->req.zero is set */
 702         if (req->req.zero) {
 703                 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
 704                         *is_last = 1;
 705                 else
 706                         *is_last = 0;
 707         } else if (req->req.length == req->req.actual)
 708                 *is_last = 1;
 709         else
 710                 *is_last = 0;
 711
 712         if ((*is_last) == 0)
 713                 VDBG("multi-dtd request!\n");
 714         /* Fill in the transfer size; set active bit */
 715         swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
 716
 717         /* Enable interrupt for the last dtd of a request */
 718         if (*is_last && !req->req.no_interrupt)
 719                 swap_temp |= DTD_IOC;
 720
 721         dtd->size_ioc_sts = cpu_to_le32(swap_temp);
 722
 723         mb();
 724
 725         VDBG("length = %d address= 0x%x", *length, (int)*dma);
 726
 727         return dtd;
 728 }
 729
 730 /* Generate dtd chain for a request */
 731 static int fsl_req_to_dtd(struct fsl_req *req)
 732 {
 733         unsigned        count;
 734         int             is_last;
 735         int             is_first =1;
 736         struct ep_td_struct     *last_dtd = NULL, *dtd;
 737         dma_addr_t dma;
 738
 739         do {
 740                 dtd = fsl_build_dtd(req, &count, &dma, &is_last);
 741                 if (dtd == NULL)
 742                         return -ENOMEM;
 743
 744                 if (is_first) {
 745                         is_first = 0;
 746                         req->head = dtd;
 747                 } else {
 748                         last_dtd->next_td_ptr = cpu_to_le32(dma);
 749                         last_dtd->next_td_virt = dtd;
 750                 }
 751                 last_dtd = dtd;
 752
 753                 req->dtd_count++;
 754         } while (!is_last);
 755
 756         dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
 757
 758         req->tail = dtd;
 759
 760         return 0;
 761 }
 762
 763 /* queues (submits) an I/O request to an endpoint */
 764 static int
 765 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 766 {
 767         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 768         struct fsl_req *req = container_of(_req, struct fsl_req, req);
 769         struct fsl_udc *udc;
 770         unsigned long flags;
 771         int is_iso = 0;
 772
 773         /* catch various bogus parameters */
 774         if (!_req || !req->req.complete || !req->req.buf
 775                         || !list_empty(&req->queue)) {
 776                 VDBG("%s, bad params\n", __func__);
 777                 return -EINVAL;
 778         }
 779         if (unlikely(!_ep || !ep->desc)) {
 780                 VDBG("%s, bad ep\n", __func__);
 781                 return -EINVAL;
 782         }
 783         if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 784                 if (req->req.length > ep->ep.maxpacket)
 785                         return -EMSGSIZE;
 786                 is_iso = 1;
 787         }
 788
 789         udc = ep->udc;
 790         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 791                 return -ESHUTDOWN;
 792
 793         req->ep = ep;
 794
 795         /* map virtual address to hardware */
 796         if (req->req.dma == DMA_ADDR_INVALID) {
 797                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
 798                                         req->req.buf,
 799                                         req->req.length, ep_is_in(ep)
 800                                                 ? DMA_TO_DEVICE
 801                                                 : DMA_FROM_DEVICE);
 802                 req->mapped = 1;
 803         } else {
 804                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
 805                                         req->req.dma, req->req.length,
 806                                         ep_is_in(ep)
 807                                                 ? DMA_TO_DEVICE
 808                                                 : DMA_FROM_DEVICE);
 809                 req->mapped = 0;
 810         }
 811
 812         req->req.status = -EINPROGRESS;
 813         req->req.actual = 0;
 814         req->dtd_count = 0;
 815
 816         spin_lock_irqsave(&udc->lock, flags);
 817
 818         /* build dtds and push them to device queue */
 819         if (!fsl_req_to_dtd(req)) {
 820                 fsl_queue_td(ep, req);
 821         } else {
 822                 spin_unlock_irqrestore(&udc->lock, flags);
 823                 return -ENOMEM;
 824         }
 825
 826         /* Update ep0 state */
 827         if ((ep_index(ep) == 0))
 828                 udc->ep0_state = DATA_STATE_XMIT;
 829
 830         /* irq handler advances the queue */
 831         if (req != NULL)
 832                 list_add_tail(&req->queue, &ep->queue);
 833         spin_unlock_irqrestore(&udc->lock, flags);
 834
 835         return 0;
 836 }
 837
 838 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
 839 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 840 {
 841         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 842         struct fsl_req *req;
 843         unsigned long flags;
 844         int ep_num, stopped, ret = 0;
 845         u32 epctrl;
 846
 847         if (!_ep || !_req)
 848                 return -EINVAL;
 849
 850         spin_lock_irqsave(&ep->udc->lock, flags);
 851         stopped = ep->stopped;
 852
 853         /* Stop the ep before we deal with the queue */
 854         ep->stopped = 1;
 855         ep_num = ep_index(ep);
 856         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 857         if (ep_is_in(ep))
 858                 epctrl &= ~EPCTRL_TX_ENABLE;
 859         else
 860                 epctrl &= ~EPCTRL_RX_ENABLE;
 861         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 862
 863         /* make sure it's actually queued on this endpoint */
 864         list_for_each_entry(req, &ep->queue, queue) {
 865                 if (&req->req == _req)
 866                         break;
 867         }
 868         if (&req->req != _req) {
 869                 ret = -EINVAL;
 870                 goto out;
 871         }
 872
 873         /* The request is in progress, or completed but not dequeued */
 874         if (ep->queue.next == &req->queue) {
 875                 _req->status = -ECONNRESET;
 876                 fsl_ep_fifo_flush(_ep); /* flush current transfer */
 877
 878                 /* The request isn't the last request in this ep queue */
 879                 if (req->queue.next != &ep->queue) {
 880                         struct ep_queue_head *qh;
 881                         struct fsl_req *next_req;
 882
 883                         qh = ep->qh;
 884                         next_req = list_entry(req->queue.next, struct fsl_req,
 885                                         queue);
 886
 887                         /* Point the QH to the first TD of next request */
 888                         fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
 889                 }
 890
 891                 /* The request hasn't been processed, patch up the TD chain */
 892         } else {
 893                 struct fsl_req *prev_req;
 894
 895                 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
 896                 fsl_writel(fsl_readl(&req->tail->next_td_ptr),
 897                                 &prev_req->tail->next_td_ptr);
 898
 899         }
 900
 901         done(ep, req, -ECONNRESET);
 902
 903         /* Enable EP */
 904 out:    epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 905         if (ep_is_in(ep))
 906                 epctrl |= EPCTRL_TX_ENABLE;
 907         else
 908                 epctrl |= EPCTRL_RX_ENABLE;
 909         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 910         ep->stopped = stopped;
 911
 912         spin_unlock_irqrestore(&ep->udc->lock, flags);
 913         return ret;
 914 }
 915
 916 /*-------------------------------------------------------------------------*/
 917
 918 /*-----------------------------------------------------------------
 919  * modify the endpoint halt feature
 920  * @ep: the non-isochronous endpoint being stalled
 921  * @value: 1--set halt  0--clear halt
 922  * Returns zero, or a negative error code.
 923 *----------------------------------------------------------------*/
 924 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
 925 {
 926         struct fsl_ep *ep = NULL;
 927         unsigned long flags = 0;
 928         int status = -EOPNOTSUPP;       /* operation not supported */
 929         unsigned char ep_dir = 0, ep_num = 0;
 930         struct fsl_udc *udc = NULL;
 931
 932         ep = container_of(_ep, struct fsl_ep, ep);
 933         udc = ep->udc;
 934         if (!_ep || !ep->desc) {
 935                 status = -EINVAL;
 936                 goto out;
 937         }
 938
 939         if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 940                 status = -EOPNOTSUPP;
 941                 goto out;
 942         }
 943
 944         /* Attempt to halt IN ep will fail if any transfer requests
 945          * are still queue */
 946         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
 947                 status = -EAGAIN;
 948                 goto out;
 949         }
 950
 951         status = 0;
 952         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
 953         ep_num = (unsigned char)(ep_index(ep));
 954         spin_lock_irqsave(&ep->udc->lock, flags);
 955         dr_ep_change_stall(ep_num, ep_dir, value);
 956         spin_unlock_irqrestore(&ep->udc->lock, flags);
 957
 958         if (ep_index(ep) == 0) {
 959                 udc->ep0_state = WAIT_FOR_SETUP;
 960                 udc->ep0_dir = 0;
 961         }
 962 out:
 963         VDBG(" %s %s halt stat %d", ep->ep.name,
 964                         value ?  "set" : "clear", status);
 965
 966         return status;
 967 }
 968
 969 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
 970 {
 971         struct fsl_ep *ep;
 972         int ep_num, ep_dir;
 973         u32 bits;
 974         unsigned long timeout;
 975 #define FSL_UDC_FLUSH_TIMEOUT 1000
 976
 977         if (!_ep) {
 978                 return;
 979         } else {
 980                 ep = container_of(_ep, struct fsl_ep, ep);
 981                 if (!ep->desc)
 982                         return;
 983         }
 984         ep_num = ep_index(ep);
 985         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
 986
 987         if (ep_num == 0)
 988                 bits = (1 << 16) | 1;
 989         else if (ep_dir == USB_SEND)
 990                 bits = 1 << (16 + ep_num);
 991         else
 992                 bits = 1 << ep_num;
 993
 994         timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
 995         do {
 996                 fsl_writel(bits, &dr_regs->endptflush);
 997
 998                 /* Wait until flush complete */
 999                 while (fsl_readl(&dr_regs->endptflush)) {
1000                         if (time_after(jiffies, timeout)) {
1001                                 ERR("ep flush timeout\n");
1002                                 return;
1003                         }
1004                         cpu_relax();
1005                 }
1006                 /* See if we need to flush again */
1007         } while (fsl_readl(&dr_regs->endptstatus) & bits);
1008 }
1009
1010 static struct usb_ep_ops fsl_ep_ops = {
1011         .enable = fsl_ep_enable,
1012         .disable = fsl_ep_disable,
1013
1014         .alloc_request = fsl_alloc_request,
1015         .free_request = fsl_free_request,
1016
1017         .queue = fsl_ep_queue,
1018         .dequeue = fsl_ep_dequeue,
1019
1020         .set_halt = fsl_ep_set_halt,
1021         .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
1022 };
1023
1024 /*-------------------------------------------------------------------------
1025                 Gadget Driver Layer Operations
1026 -------------------------------------------------------------------------*/
1027
1028 /*----------------------------------------------------------------------
1029  * Get the current frame number (from DR frame_index Reg )
1030  *----------------------------------------------------------------------*/
1031 static int fsl_get_frame(struct usb_gadget *gadget)
1032 {
1033         return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1034 }
1035
1036 /*-----------------------------------------------------------------------
1037  * Tries to wake up the host connected to this gadget
1038  -----------------------------------------------------------------------*/
1039 static int fsl_wakeup(struct usb_gadget *gadget)
1040 {
1041         struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1042         u32 portsc;
1043
1044         /* Remote wakeup feature not enabled by host */
1045         if (!udc->remote_wakeup)
1046                 return -ENOTSUPP;
1047
1048         portsc = fsl_readl(&dr_regs->portsc1);
1049         /* not suspended? */
1050         if (!(portsc & PORTSCX_PORT_SUSPEND))
1051                 return 0;
1052         /* trigger force resume */
1053         portsc |= PORTSCX_PORT_FORCE_RESUME;
1054         fsl_writel(portsc, &dr_regs->portsc1);
1055         return 0;
1056 }
1057
1058 static int can_pullup(struct fsl_udc *udc)
1059 {
1060         return udc->driver && udc->softconnect && udc->vbus_active;
1061 }
1062
1063 /* Notify controller that VBUS is powered, Called by whatever
1064    detects VBUS sessions */
1065 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1066 {
1067         struct fsl_udc  *udc;
1068         unsigned long   flags;
1069
1070         udc = container_of(gadget, struct fsl_udc, gadget);
1071         spin_lock_irqsave(&udc->lock, flags);
1072         VDBG("VBUS %s\n", is_active ? "on" : "off");
1073         udc->vbus_active = (is_active != 0);
1074         if (can_pullup(udc))
1075                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1076                                 &dr_regs->usbcmd);
1077         else
1078                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1079                                 &dr_regs->usbcmd);
1080         spin_unlock_irqrestore(&udc->lock, flags);
1081         return 0;
1082 }
1083
1084 /* constrain controller's VBUS power usage
1085  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1086  * reporting how much power the device may consume.  For example, this
1087  * could affect how quickly batteries are recharged.
1088  *
1089  * Returns zero on success, else negative errno.
1090  */
1091 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1092 {
1093         struct fsl_udc *udc;
1094
1095         udc = container_of(gadget, struct fsl_udc, gadget);
1096         if (udc->transceiver)
1097                 return otg_set_power(udc->transceiver, mA);
1098         return -ENOTSUPP;
1099 }
1100
1101 /* Change Data+ pullup status
1102  * this func is used by usb_gadget_connect/disconnet
1103  */
1104 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1105 {
1106         struct fsl_udc *udc;
1107
1108         udc = container_of(gadget, struct fsl_udc, gadget);
1109         udc->softconnect = (is_on != 0);
1110         if (can_pullup(udc))
1111                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1112                                 &dr_regs->usbcmd);
1113         else
1114                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1115                                 &dr_regs->usbcmd);
1116
1117         return 0;
1118 }
1119
1120 /* defined in gadget.h */
1121 static struct usb_gadget_ops fsl_gadget_ops = {
1122         .get_frame = fsl_get_frame,
1123         .wakeup = fsl_wakeup,
1124 /*      .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1125         .vbus_session = fsl_vbus_session,
1126         .vbus_draw = fsl_vbus_draw,
1127         .pullup = fsl_pullup,
1128 };
1129
1130 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1131    on new transaction */
1132 static void ep0stall(struct fsl_udc *udc)
1133 {
1134         u32 tmp;
1135
1136         /* must set tx and rx to stall at the same time */
1137         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1138         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1139         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1140         udc->ep0_state = WAIT_FOR_SETUP;
1141         udc->ep0_dir = 0;
1142 }
1143
1144 /* Prime a status phase for ep0 */
1145 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1146 {
1147         struct fsl_req *req = udc->status_req;
1148         struct fsl_ep *ep;
1149         int status = 0;
1150
1151         if (direction == EP_DIR_IN)
1152                 udc->ep0_dir = USB_DIR_IN;
1153         else
1154                 udc->ep0_dir = USB_DIR_OUT;
1155
1156         ep = &udc->eps[0];
1157         udc->ep0_state = WAIT_FOR_OUT_STATUS;
1158
1159         req->ep = ep;
1160         req->req.length = 0;
1161         req->req.status = -EINPROGRESS;
1162         req->req.actual = 0;
1163         req->req.complete = NULL;
1164         req->dtd_count = 0;
1165
1166         if (fsl_req_to_dtd(req) == 0)
1167                 status = fsl_queue_td(ep, req);
1168         else
1169                 return -ENOMEM;
1170
1171         if (status)
1172                 ERR("Can't queue ep0 status request \n");
1173         list_add_tail(&req->queue, &ep->queue);
1174
1175         return status;
1176 }
1177
1178 static inline int udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1179 {
1180         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1181
1182         if (!ep->name)
1183                 return 0;
1184
1185         nuke(ep, -ESHUTDOWN);
1186
1187         return 0;
1188 }
1189
1190 /*
1191  * ch9 Set address
1192  */
1193 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1194 {
1195         /* Save the new address to device struct */
1196         udc->device_address = (u8) value;
1197         /* Update usb state */
1198         udc->usb_state = USB_STATE_ADDRESS;
1199         /* Status phase */
1200         if (ep0_prime_status(udc, EP_DIR_IN))
1201                 ep0stall(udc);
1202 }
1203
1204 /*
1205  * ch9 Get status
1206  */
1207 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1208                 u16 index, u16 length)
1209 {
1210         u16 tmp = 0;            /* Status, cpu endian */
1211
1212         struct fsl_req *req;
1213         struct fsl_ep *ep;
1214         int status = 0;
1215
1216         ep = &udc->eps[0];
1217
1218         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1219                 /* Get device status */
1220                 tmp = 1 << USB_DEVICE_SELF_POWERED;
1221                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1222         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1223                 /* Get interface status */
1224                 /* We don't have interface information in udc driver */
1225                 tmp = 0;
1226         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1227                 /* Get endpoint status */
1228                 struct fsl_ep *target_ep;
1229
1230                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1231
1232                 /* stall if endpoint doesn't exist */
1233                 if (!target_ep->desc)
1234                         goto stall;
1235                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1236                                 << USB_ENDPOINT_HALT;
1237         }
1238
1239         udc->ep0_dir = USB_DIR_IN;
1240         /* Borrow the per device status_req */
1241         req = udc->status_req;
1242         /* Fill in the reqest structure */
1243         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1244         req->ep = ep;
1245         req->req.length = 2;
1246         req->req.status = -EINPROGRESS;
1247         req->req.actual = 0;
1248         req->req.complete = NULL;
1249         req->dtd_count = 0;
1250
1251         /* prime the data phase */
1252         if ((fsl_req_to_dtd(req) == 0))
1253                 status = fsl_queue_td(ep, req);
1254         else                    /* no mem */
1255                 goto stall;
1256
1257         if (status) {
1258                 ERR("Can't respond to getstatus request \n");
1259                 goto stall;
1260         }
1261         list_add_tail(&req->queue, &ep->queue);
1262         udc->ep0_state = DATA_STATE_XMIT;
1263         return;
1264 stall:
1265         ep0stall(udc);
1266 }
1267
1268 static void setup_received_irq(struct fsl_udc *udc,
1269                 struct usb_ctrlrequest *setup)
1270 {
1271         u16 wValue = le16_to_cpu(setup->wValue);
1272         u16 wIndex = le16_to_cpu(setup->wIndex);
1273         u16 wLength = le16_to_cpu(setup->wLength);
1274
1275         udc_reset_ep_queue(udc, 0);
1276
1277         /* We process some stardard setup requests here */
1278         switch (setup->bRequest) {
1279         case USB_REQ_GET_STATUS:
1280                 /* Data+Status phase from udc */
1281                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1282                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1283                         break;
1284                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1285                 return;
1286
1287         case USB_REQ_SET_ADDRESS:
1288                 /* Status phase from udc */
1289                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1290                                                 | USB_RECIP_DEVICE))
1291                         break;
1292                 ch9setaddress(udc, wValue, wIndex, wLength);
1293                 return;
1294
1295         case USB_REQ_CLEAR_FEATURE:
1296         case USB_REQ_SET_FEATURE:
1297                 /* Status phase from udc */
1298         {
1299                 int rc = -EOPNOTSUPP;
1300
1301                 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1302                                 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1303                         int pipe = get_pipe_by_windex(wIndex);
1304                         struct fsl_ep *ep;
1305
1306                         if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
1307                                 break;
1308                         ep = get_ep_by_pipe(udc, pipe);
1309
1310                         spin_unlock(&udc->lock);
1311                         rc = fsl_ep_set_halt(&ep->ep,
1312                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1313                                                 ? 1 : 0);
1314                         spin_lock(&udc->lock);
1315
1316                 } else if ((setup->bRequestType & (USB_RECIP_MASK
1317                                 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1318                                 | USB_TYPE_STANDARD)) {
1319                         /* Note: The driver has not include OTG support yet.
1320                          * This will be set when OTG support is added */
1321                         if (!gadget_is_otg(&udc->gadget))
1322                                 break;
1323                         else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
1324                                 udc->gadget.b_hnp_enable = 1;
1325                         else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
1326                                 udc->gadget.a_hnp_support = 1;
1327                         else if (setup->bRequest ==
1328                                         USB_DEVICE_A_ALT_HNP_SUPPORT)
1329                                 udc->gadget.a_alt_hnp_support = 1;
1330                         else
1331                                 break;
1332                         rc = 0;
1333                 } else
1334                         break;
1335
1336                 if (rc == 0) {
1337                         if (ep0_prime_status(udc, EP_DIR_IN))
1338                                 ep0stall(udc);
1339                 }
1340                 return;
1341         }
1342
1343         default:
1344                 break;
1345         }
1346
1347         /* Requests handled by gadget */
1348         if (wLength) {
1349                 /* Data phase from gadget, status phase from udc */
1350                 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1351                                 ?  USB_DIR_IN : USB_DIR_OUT;
1352                 spin_unlock(&udc->lock);
1353                 if (udc->driver->setup(&udc->gadget,
1354                                 &udc->local_setup_buff) < 0)
1355                         ep0stall(udc);
1356                 spin_lock(&udc->lock);
1357                 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1358                                 ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1359         } else {
1360                 /* No data phase, IN status from gadget */
1361                 udc->ep0_dir = USB_DIR_IN;
1362                 spin_unlock(&udc->lock);
1363                 if (udc->driver->setup(&udc->gadget,
1364                                 &udc->local_setup_buff) < 0)
1365                         ep0stall(udc);
1366                 spin_lock(&udc->lock);
1367                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1368         }
1369 }
1370
1371 /* Process request for Data or Status phase of ep0
1372  * prime status phase if needed */
1373 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1374                 struct fsl_req *req)
1375 {
1376         if (udc->usb_state == USB_STATE_ADDRESS) {
1377                 /* Set the new address */
1378                 u32 new_address = (u32) udc->device_address;
1379                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1380                                 &dr_regs->deviceaddr);
1381         }
1382
1383         done(ep0, req, 0);
1384
1385         switch (udc->ep0_state) {
1386         case DATA_STATE_XMIT:
1387                 /* receive status phase */
1388                 if (ep0_prime_status(udc, EP_DIR_OUT))
1389                         ep0stall(udc);
1390                 break;
1391         case DATA_STATE_RECV:
1392                 /* send status phase */
1393                 if (ep0_prime_status(udc, EP_DIR_IN))
1394                         ep0stall(udc);
1395                 break;
1396         case WAIT_FOR_OUT_STATUS:
1397                 udc->ep0_state = WAIT_FOR_SETUP;
1398                 break;
1399         case WAIT_FOR_SETUP:
1400                 ERR("Unexpect ep0 packets \n");
1401                 break;
1402         default:
1403                 ep0stall(udc);
1404                 break;
1405         }
1406 }
1407
1408 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1409  * being corrupted by another incoming setup packet */
1410 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1411 {
1412         u32 temp;
1413         struct ep_queue_head *qh;
1414
1415         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1416
1417         /* Clear bit in ENDPTSETUPSTAT */
1418         temp = fsl_readl(&dr_regs->endptsetupstat);
1419         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1420
1421         /* while a hazard exists when setup package arrives */
1422         do {
1423                 /* Set Setup Tripwire */
1424                 temp = fsl_readl(&dr_regs->usbcmd);
1425                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1426
1427                 /* Copy the setup packet to local buffer */
1428                 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1429         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1430
1431         /* Clear Setup Tripwire */
1432         temp = fsl_readl(&dr_regs->usbcmd);
1433         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1434 }
1435
1436 /* process-ep_req(): free the completed Tds for this req */
1437 static int process_ep_req(struct fsl_udc *udc, int pipe,
1438                 struct fsl_req *curr_req)
1439 {
1440         struct ep_td_struct *curr_td;
1441         int     td_complete, actual, remaining_length, j, tmp;
1442         int     status = 0;
1443         int     errors = 0;
1444         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1445         int direction = pipe % 2;
1446
1447         curr_td = curr_req->head;
1448         td_complete = 0;
1449         actual = curr_req->req.length;
1450
1451         for (j = 0; j < curr_req->dtd_count; j++) {
1452                 remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
1453                                         & DTD_PACKET_SIZE)
1454                                 >> DTD_LENGTH_BIT_POS;
1455                 actual -= remaining_length;
1456
1457                 if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
1458                                                 DTD_ERROR_MASK)) {
1459                         if (errors & DTD_STATUS_HALTED) {
1460                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1461                                 /* Clear the errors and Halt condition */
1462                                 tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
1463                                 tmp &= ~errors;
1464                                 curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
1465                                 status = -EPIPE;
1466                                 /* FIXME: continue with next queued TD? */
1467
1468                                 break;
1469                         }
1470                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1471                                 VDBG("Transfer overflow");
1472                                 status = -EPROTO;
1473                                 break;
1474                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1475                                 VDBG("ISO error");
1476                                 status = -EILSEQ;
1477                                 break;
1478                         } else
1479                                 ERR("Unknown error has occured (0x%x)!\r\n",
1480                                         errors);
1481
1482                 } else if (le32_to_cpu(curr_td->size_ioc_sts)
1483                                 & DTD_STATUS_ACTIVE) {
1484                         VDBG("Request not complete");
1485                         status = REQ_UNCOMPLETE;
1486                         return status;
1487                 } else if (remaining_length) {
1488                         if (direction) {
1489                                 VDBG("Transmit dTD remaining length not zero");
1490                                 status = -EPROTO;
1491                                 break;
1492                         } else {
1493                                 td_complete++;
1494                                 break;
1495                         }
1496                 } else {
1497                         td_complete++;
1498                         VDBG("dTD transmitted successful ");
1499                 }
1500
1501                 if (j != curr_req->dtd_count - 1)
1502                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1503         }
1504
1505         if (status)
1506                 return status;
1507
1508         curr_req->req.actual = actual;
1509
1510         return 0;
1511 }
1512
1513 /* Process a DTD completion interrupt */
1514 static void dtd_complete_irq(struct fsl_udc *udc)
1515 {
1516         u32 bit_pos;
1517         int i, ep_num, direction, bit_mask, status;
1518         struct fsl_ep *curr_ep;
1519         struct fsl_req *curr_req, *temp_req;
1520
1521         /* Clear the bits in the register */
1522         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1523         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1524
1525         if (!bit_pos)
1526                 return;
1527
1528         for (i = 0; i < udc->max_ep * 2; i++) {
1529                 ep_num = i >> 1;
1530                 direction = i % 2;
1531
1532                 bit_mask = 1 << (ep_num + 16 * direction);
1533
1534                 if (!(bit_pos & bit_mask))
1535                         continue;
1536
1537                 curr_ep = get_ep_by_pipe(udc, i);
1538
1539                 /* If the ep is configured */
1540                 if (curr_ep->name == NULL) {
1541                         WARNING("Invalid EP?");
1542                         continue;
1543                 }
1544
1545                 /* process the req queue until an uncomplete request */
1546                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1547                                 queue) {
1548                         status = process_ep_req(udc, i, curr_req);
1549
1550                         VDBG("status of process_ep_req= %d, ep = %d",
1551                                         status, ep_num);
1552                         if (status == REQ_UNCOMPLETE)
1553                                 break;
1554                         /* write back status to req */
1555                         curr_req->req.status = status;
1556
1557                         if (ep_num == 0) {
1558                                 ep0_req_complete(udc, curr_ep, curr_req);
1559                                 break;
1560                         } else
1561                                 done(curr_ep, curr_req, status);
1562                 }
1563         }
1564 }
1565
1566 /* Process a port change interrupt */
1567 static void port_change_irq(struct fsl_udc *udc)
1568 {
1569         u32 speed;
1570
1571         if (udc->bus_reset)
1572                 udc->bus_reset = 0;
1573
1574         /* Bus resetting is finished */
1575         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
1576                 /* Get the speed */
1577                 speed = (fsl_readl(&dr_regs->portsc1)
1578                                 & PORTSCX_PORT_SPEED_MASK);
1579                 switch (speed) {
1580                 case PORTSCX_PORT_SPEED_HIGH:
1581                         udc->gadget.speed = USB_SPEED_HIGH;
1582                         break;
1583                 case PORTSCX_PORT_SPEED_FULL:
1584                         udc->gadget.speed = USB_SPEED_FULL;
1585                         break;
1586                 case PORTSCX_PORT_SPEED_LOW:
1587                         udc->gadget.speed = USB_SPEED_LOW;
1588                         break;
1589                 default:
1590                         udc->gadget.speed = USB_SPEED_UNKNOWN;
1591                         break;
1592                 }
1593         }
1594
1595         /* Update USB state */
1596         if (!udc->resume_state)
1597                 udc->usb_state = USB_STATE_DEFAULT;
1598 }
1599
1600 /* Process suspend interrupt */
1601 static void suspend_irq(struct fsl_udc *udc)
1602 {
1603         udc->resume_state = udc->usb_state;
1604         udc->usb_state = USB_STATE_SUSPENDED;
1605
1606         /* report suspend to the driver, serial.c does not support this */
1607         if (udc->driver->suspend)
1608                 udc->driver->suspend(&udc->gadget);
1609 }
1610
1611 static void bus_resume(struct fsl_udc *udc)
1612 {
1613         udc->usb_state = udc->resume_state;
1614         udc->resume_state = 0;
1615
1616         /* report resume to the driver, serial.c does not support this */
1617         if (udc->driver->resume)
1618                 udc->driver->resume(&udc->gadget);
1619 }
1620
1621 /* Clear up all ep queues */
1622 static int reset_queues(struct fsl_udc *udc)
1623 {
1624         u8 pipe;
1625
1626         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1627                 udc_reset_ep_queue(udc, pipe);
1628
1629         /* report disconnect; the driver is already quiesced */
1630         spin_unlock(&udc->lock);
1631         udc->driver->disconnect(&udc->gadget);
1632         spin_lock(&udc->lock);
1633
1634         return 0;
1635 }
1636
1637 /* Process reset interrupt */
1638 static void reset_irq(struct fsl_udc *udc)
1639 {
1640         u32 temp;
1641         unsigned long timeout;
1642
1643         /* Clear the device address */
1644         temp = fsl_readl(&dr_regs->deviceaddr);
1645         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1646
1647         udc->device_address = 0;
1648
1649         /* Clear usb state */
1650         udc->resume_state = 0;
1651         udc->ep0_dir = 0;
1652         udc->ep0_state = WAIT_FOR_SETUP;
1653         udc->remote_wakeup = 0; /* default to 0 on reset */
1654         udc->gadget.b_hnp_enable = 0;
1655         udc->gadget.a_hnp_support = 0;
1656         udc->gadget.a_alt_hnp_support = 0;
1657
1658         /* Clear all the setup token semaphores */
1659         temp = fsl_readl(&dr_regs->endptsetupstat);
1660         fsl_writel(temp, &dr_regs->endptsetupstat);
1661
1662         /* Clear all the endpoint complete status bits */
1663         temp = fsl_readl(&dr_regs->endptcomplete);
1664         fsl_writel(temp, &dr_regs->endptcomplete);
1665
1666         timeout = jiffies + 100;
1667         while (fsl_readl(&dr_regs->endpointprime)) {
1668                 /* Wait until all endptprime bits cleared */
1669                 if (time_after(jiffies, timeout)) {
1670                         ERR("Timeout for reset\n");
1671                         break;
1672                 }
1673                 cpu_relax();
1674         }
1675
1676         /* Write 1s to the flush register */
1677         fsl_writel(0xffffffff, &dr_regs->endptflush);
1678
1679         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1680                 VDBG("Bus reset");
1681                 /* Bus is reseting */
1682                 udc->bus_reset = 1;
1683                 /* Reset all the queues, include XD, dTD, EP queue
1684                  * head and TR Queue */
1685                 reset_queues(udc);
1686                 udc->usb_state = USB_STATE_DEFAULT;
1687         } else {
1688                 VDBG("Controller reset");
1689                 /* initialize usb hw reg except for regs for EP, not
1690                  * touch usbintr reg */
1691                 dr_controller_setup(udc);
1692
1693                 /* Reset all internal used Queues */
1694                 reset_queues(udc);
1695
1696                 ep0_setup(udc);
1697
1698                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1699                 dr_controller_run(udc);
1700                 udc->usb_state = USB_STATE_ATTACHED;
1701         }
1702 }
1703
1704 /*
1705  * USB device controller interrupt handler
1706  */
1707 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1708 {
1709         struct fsl_udc *udc = _udc;
1710         u32 irq_src;
1711         irqreturn_t status = IRQ_NONE;
1712         unsigned long flags;
1713
1714         /* Disable ISR for OTG host mode */
1715         if (udc->stopped)
1716                 return IRQ_NONE;
1717         spin_lock_irqsave(&udc->lock, flags);
1718         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1719         /* Clear notification bits */
1720         fsl_writel(irq_src, &dr_regs->usbsts);
1721
1722         /* VDBG("irq_src [0x%8x]", irq_src); */
1723
1724         /* Need to resume? */
1725         if (udc->usb_state == USB_STATE_SUSPENDED)
1726                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1727                         bus_resume(udc);
1728
1729         /* USB Interrupt */
1730         if (irq_src & USB_STS_INT) {
1731                 VDBG("Packet int");
1732                 /* Setup package, we only support ep0 as control ep */
1733                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1734                         tripwire_handler(udc, 0,
1735                                         (u8 *) (&udc->local_setup_buff));
1736                         setup_received_irq(udc, &udc->local_setup_buff);
1737                         status = IRQ_HANDLED;
1738                 }
1739
1740                 /* completion of dtd */
1741                 if (fsl_readl(&dr_regs->endptcomplete)) {
1742                         dtd_complete_irq(udc);
1743                         status = IRQ_HANDLED;
1744                 }
1745         }
1746
1747         /* SOF (for ISO transfer) */
1748         if (irq_src & USB_STS_SOF) {
1749                 status = IRQ_HANDLED;
1750         }
1751
1752         /* Port Change */
1753         if (irq_src & USB_STS_PORT_CHANGE) {
1754                 port_change_irq(udc);
1755                 status = IRQ_HANDLED;
1756         }
1757
1758         /* Reset Received */
1759         if (irq_src & USB_STS_RESET) {
1760                 reset_irq(udc);
1761                 status = IRQ_HANDLED;
1762         }
1763
1764         /* Sleep Enable (Suspend) */
1765         if (irq_src & USB_STS_SUSPEND) {
1766                 suspend_irq(udc);
1767                 status = IRQ_HANDLED;
1768         }
1769
1770         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1771                 VDBG("Error IRQ %x ", irq_src);
1772         }
1773
1774         spin_unlock_irqrestore(&udc->lock, flags);
1775         return status;
1776 }
1777
1778 /*----------------------------------------------------------------*
1779  * Hook to gadget drivers
1780  * Called by initialization code of gadget drivers
1781 *----------------------------------------------------------------*/
1782 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1783 {
1784         int retval = -ENODEV;
1785         unsigned long flags = 0;
1786
1787         if (!udc_controller)
1788                 return -ENODEV;
1789
1790         if (!driver || (driver->speed != USB_SPEED_FULL
1791                                 && driver->speed != USB_SPEED_HIGH)
1792                         || !driver->bind || !driver->disconnect
1793                         || !driver->setup)
1794                 return -EINVAL;
1795
1796         if (udc_controller->driver)
1797                 return -EBUSY;
1798
1799         /* lock is needed but whether should use this lock or another */
1800         spin_lock_irqsave(&udc_controller->lock, flags);
1801
1802         driver->driver.bus = 0;
1803         /* hook up the driver */
1804         udc_controller->driver = driver;
1805         udc_controller->gadget.dev.driver = &driver->driver;
1806         spin_unlock_irqrestore(&udc_controller->lock, flags);
1807
1808         /* bind udc driver to gadget driver */
1809         retval = driver->bind(&udc_controller->gadget);
1810         if (retval) {
1811                 VDBG("bind to %s --> %d", driver->driver.name, retval);
1812                 udc_controller->gadget.dev.driver = 0;
1813                 udc_controller->driver = 0;
1814                 goto out;
1815         }
1816
1817         /* Enable DR IRQ reg and Set usbcmd reg  Run bit */
1818         dr_controller_run(udc_controller);
1819         udc_controller->usb_state = USB_STATE_ATTACHED;
1820         udc_controller->ep0_state = WAIT_FOR_SETUP;
1821         udc_controller->ep0_dir = 0;
1822         printk(KERN_INFO "%s: bind to driver %s \n",
1823                         udc_controller->gadget.name, driver->driver.name);
1824
1825 out:
1826         if (retval)
1827                 printk("retval %d \n", retval);
1828         return retval;
1829 }
1830 EXPORT_SYMBOL(usb_gadget_register_driver);
1831
1832 /* Disconnect from gadget driver */
1833 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1834 {
1835         struct fsl_ep *loop_ep;
1836         unsigned long flags;
1837
1838         if (!udc_controller)
1839                 return -ENODEV;
1840
1841         if (!driver || driver != udc_controller->driver || !driver->unbind)
1842                 return -EINVAL;
1843
1844         if (udc_controller->transceiver)
1845                 (void)otg_set_peripheral(udc_controller->transceiver, 0);
1846
1847         /* stop DR, disable intr */
1848         dr_controller_stop(udc_controller);
1849
1850         /* in fact, no needed */
1851         udc_controller->usb_state = USB_STATE_ATTACHED;
1852         udc_controller->ep0_state = WAIT_FOR_SETUP;
1853         udc_controller->ep0_dir = 0;
1854
1855         /* stand operation */
1856         spin_lock_irqsave(&udc_controller->lock, flags);
1857         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1858         nuke(&udc_controller->eps[0], -ESHUTDOWN);
1859         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1860                         ep.ep_list)
1861                 nuke(loop_ep, -ESHUTDOWN);
1862         spin_unlock_irqrestore(&udc_controller->lock, flags);
1863
1864         /* unbind gadget and unhook driver. */
1865         driver->unbind(&udc_controller->gadget);
1866         udc_controller->gadget.dev.driver = 0;
1867         udc_controller->driver = 0;
1868
1869         printk("unregistered gadget driver '%s'\r\n", driver->driver.name);
1870         return 0;
1871 }
1872 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1873
1874 /*-------------------------------------------------------------------------
1875                 PROC File System Support
1876 -------------------------------------------------------------------------*/
1877 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1878
1879 #include <linux/seq_file.h>
1880
1881 static const char proc_filename[] = "driver/fsl_usb2_udc";
1882
1883 static int fsl_proc_read(char *page, char **start, off_t off, int count,
1884                 int *eof, void *_dev)
1885 {
1886         char *buf = page;
1887         char *next = buf;
1888         unsigned size = count;
1889         unsigned long flags;
1890         int t, i;
1891         u32 tmp_reg;
1892         struct fsl_ep *ep = NULL;
1893         struct fsl_req *req;
1894
1895         struct fsl_udc *udc = udc_controller;
1896         if (off != 0)
1897                 return 0;
1898
1899         spin_lock_irqsave(&udc->lock, flags);
1900
1901         /* ------basic driver information ---- */
1902         t = scnprintf(next, size,
1903                         DRIVER_DESC "\n"
1904                         "%s version: %s\n"
1905                         "Gadget driver: %s\n\n",
1906                         driver_name, DRIVER_VERSION,
1907                         udc->driver ? udc->driver->driver.name : "(none)");
1908         size -= t;
1909         next += t;
1910
1911         /* ------ DR Registers ----- */
1912         tmp_reg = fsl_readl(&dr_regs->usbcmd);
1913         t = scnprintf(next, size,
1914                         "USBCMD reg:\n"
1915                         "SetupTW: %d\n"
1916                         "Run/Stop: %s\n\n",
1917                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
1918                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
1919         size -= t;
1920         next += t;
1921
1922         tmp_reg = fsl_readl(&dr_regs->usbsts);
1923         t = scnprintf(next, size,
1924                         "USB Status Reg:\n"
1925                         "Dr Suspend: %d" "Reset Received: %d" "System Error: %s"
1926                         "USB Error Interrupt: %s\n\n",
1927                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
1928                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
1929                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
1930                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
1931         size -= t;
1932         next += t;
1933
1934         tmp_reg = fsl_readl(&dr_regs->usbintr);
1935         t = scnprintf(next, size,
1936                         "USB Intrrupt Enable Reg:\n"
1937                         "Sleep Enable: %d" "SOF Received Enable: %d"
1938                         "Reset Enable: %d\n"
1939                         "System Error Enable: %d"
1940                         "Port Change Dectected Enable: %d\n"
1941                         "USB Error Intr Enable: %d" "USB Intr Enable: %d\n\n",
1942                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
1943                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
1944                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
1945                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
1946                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
1947                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
1948                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
1949         size -= t;
1950         next += t;
1951
1952         tmp_reg = fsl_readl(&dr_regs->frindex);
1953         t = scnprintf(next, size,
1954                         "USB Frame Index Reg:" "Frame Number is 0x%x\n\n",
1955                         (tmp_reg & USB_FRINDEX_MASKS));
1956         size -= t;
1957         next += t;
1958
1959         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
1960         t = scnprintf(next, size,
1961                         "USB Device Address Reg:" "Device Addr is 0x%x\n\n",
1962                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
1963         size -= t;
1964         next += t;
1965
1966         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
1967         t = scnprintf(next, size,
1968                         "USB Endpoint List Address Reg:"
1969                         "Device Addr is 0x%x\n\n",
1970                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
1971         size -= t;
1972         next += t;
1973
1974         tmp_reg = fsl_readl(&dr_regs->portsc1);
1975         t = scnprintf(next, size,
1976                 "USB Port Status&Control Reg:\n"
1977                 "Port Transceiver Type : %s" "Port Speed: %s \n"
1978                 "PHY Low Power Suspend: %s" "Port Reset: %s"
1979                 "Port Suspend Mode: %s \n" "Over-current Change: %s"
1980                 "Port Enable/Disable Change: %s\n"
1981                 "Port Enabled/Disabled: %s"
1982                 "Current Connect Status: %s\n\n", ( {
1983                         char *s;
1984                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
1985                         case PORTSCX_PTS_UTMI:
1986                                 s = "UTMI"; break;
1987                         case PORTSCX_PTS_ULPI:
1988                                 s = "ULPI "; break;
1989                         case PORTSCX_PTS_FSLS:
1990                                 s = "FS/LS Serial"; break;
1991                         default:
1992                                 s = "None"; break;
1993                         }
1994                         s;} ), ( {
1995                         char *s;
1996                         switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
1997                         case PORTSCX_PORT_SPEED_FULL:
1998                                 s = "Full Speed"; break;
1999                         case PORTSCX_PORT_SPEED_LOW:
2000                                 s = "Low Speed"; break;
2001                         case PORTSCX_PORT_SPEED_HIGH:
2002                                 s = "High Speed"; break;
2003                         default:
2004                                 s = "Undefined"; break;
2005                         }
2006                         s;
2007                 } ),
2008                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2009                 "Normal PHY mode" : "Low power mode",
2010                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2011                 "Not in Reset",
2012                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2013                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2014                 "No",
2015                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2016                 "Not change",
2017                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2018                 "Not correct",
2019                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2020                 "Attached" : "Not-Att");
2021         size -= t;
2022         next += t;
2023
2024         tmp_reg = fsl_readl(&dr_regs->usbmode);
2025         t = scnprintf(next, size,
2026                         "USB Mode Reg:" "Controller Mode is : %s\n\n", ( {
2027                                 char *s;
2028                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2029                                 case USB_MODE_CTRL_MODE_IDLE:
2030                                         s = "Idle"; break;
2031                                 case USB_MODE_CTRL_MODE_DEVICE:
2032                                         s = "Device Controller"; break;
2033                                 case USB_MODE_CTRL_MODE_HOST:
2034                                         s = "Host Controller"; break;
2035                                 default:
2036                                         s = "None"; break;
2037                                 }
2038                                 s;
2039                         } ));
2040         size -= t;
2041         next += t;
2042
2043         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2044         t = scnprintf(next, size,
2045                         "Endpoint Setup Status Reg:" "SETUP on ep 0x%x\n\n",
2046                         (tmp_reg & EP_SETUP_STATUS_MASK));
2047         size -= t;
2048         next += t;
2049
2050         for (i = 0; i < udc->max_ep / 2; i++) {
2051                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2052                 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2053                                 i, tmp_reg);
2054                 size -= t;
2055                 next += t;
2056         }
2057         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2058         t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n", tmp_reg);
2059         size -= t;
2060         next += t;
2061
2062         tmp_reg = usb_sys_regs->snoop1;
2063         t = scnprintf(next, size, "\nSnoop1 Reg : = [0x%x]\n\n", tmp_reg);
2064         size -= t;
2065         next += t;
2066
2067         tmp_reg = usb_sys_regs->control;
2068         t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2069                         tmp_reg);
2070         size -= t;
2071         next += t;
2072
2073         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2074         ep = &udc->eps[0];
2075         t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2076                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2077         size -= t;
2078         next += t;
2079
2080         if (list_empty(&ep->queue)) {
2081                 t = scnprintf(next, size, "its req queue is empty\n\n");
2082                 size -= t;
2083                 next += t;
2084         } else {
2085                 list_for_each_entry(req, &ep->queue, queue) {
2086                         t = scnprintf(next, size,
2087                                 "req %p actual 0x%x length 0x%x  buf %p\n",
2088                                 &req->req, req->req.actual,
2089                                 req->req.length, req->req.buf);
2090                         size -= t;
2091                         next += t;
2092                 }
2093         }
2094         /* other gadget->eplist ep */
2095         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2096                 if (ep->desc) {
2097                         t = scnprintf(next, size,
2098                                         "\nFor %s Maxpkt is 0x%x "
2099                                         "index is 0x%x\n",
2100                                         ep->ep.name, ep_maxpacket(ep),
2101                                         ep_index(ep));
2102                         size -= t;
2103                         next += t;
2104
2105                         if (list_empty(&ep->queue)) {
2106                                 t = scnprintf(next, size,
2107                                                 "its req queue is empty\n\n");
2108                                 size -= t;
2109                                 next += t;
2110                         } else {
2111                                 list_for_each_entry(req, &ep->queue, queue) {
2112                                         t = scnprintf(next, size,
2113                                                 "req %p actual 0x%x length"
2114                                                 "0x%x  buf %p\n",
2115                                                 &req->req, req->req.actual,
2116                                                 req->req.length, req->req.buf);
2117                                         size -= t;
2118                                         next += t;
2119                                         }       /* end for each_entry of ep req */
2120                                 }       /* end for else */
2121                         }       /* end for if(ep->queue) */
2122                 }               /* end (ep->desc) */
2123
2124         spin_unlock_irqrestore(&udc->lock, flags);
2125
2126         *eof = 1;
2127         return count - size;
2128 }
2129
2130 #define create_proc_file()      create_proc_read_entry(proc_filename, \
2131                                 0, NULL, fsl_proc_read, NULL)
2132
2133 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2134
2135 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2136
2137 #define create_proc_file()      do {} while (0)
2138 #define remove_proc_file()      do {} while (0)
2139
2140 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2141
2142 /*-------------------------------------------------------------------------*/
2143
2144 /* Release udc structures */
2145 static void fsl_udc_release(struct device *dev)
2146 {
2147         complete(udc_controller->done);
2148         dma_free_coherent(dev, udc_controller->ep_qh_size,
2149                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2150         kfree(udc_controller);
2151 }
2152
2153 /******************************************************************
2154         Internal structure setup functions
2155 *******************************************************************/
2156 /*------------------------------------------------------------------
2157  * init resource for globle controller
2158  * Return the udc handle on success or NULL on failure
2159  ------------------------------------------------------------------*/
2160 static int __init struct_udc_setup(struct fsl_udc *udc,
2161                 struct platform_device *pdev)
2162 {
2163         struct fsl_usb2_platform_data *pdata;
2164         size_t size;
2165
2166         pdata = pdev->dev.platform_data;
2167         udc->phy_mode = pdata->phy_mode;
2168
2169         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2170         if (!udc->eps) {
2171                 ERR("malloc fsl_ep failed\n");
2172                 return -1;
2173         }
2174
2175         /* initialized QHs, take care of alignment */
2176         size = udc->max_ep * sizeof(struct ep_queue_head);
2177         if (size < QH_ALIGNMENT)
2178                 size = QH_ALIGNMENT;
2179         else if ((size % QH_ALIGNMENT) != 0) {
2180                 size += QH_ALIGNMENT + 1;
2181                 size &= ~(QH_ALIGNMENT - 1);
2182         }
2183         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2184                                         &udc->ep_qh_dma, GFP_KERNEL);
2185         if (!udc->ep_qh) {
2186                 ERR("malloc QHs for udc failed\n");
2187                 kfree(udc->eps);
2188                 return -1;
2189         }
2190
2191         udc->ep_qh_size = size;
2192
2193         /* Initialize ep0 status request structure */
2194         /* FIXME: fsl_alloc_request() ignores ep argument */
2195         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2196                         struct fsl_req, req);
2197         /* allocate a small amount of memory to get valid address */
2198         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2199         udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
2200
2201         udc->resume_state = USB_STATE_NOTATTACHED;
2202         udc->usb_state = USB_STATE_POWERED;
2203         udc->ep0_dir = 0;
2204         udc->remote_wakeup = 0; /* default to 0 on reset */
2205         spin_lock_init(&udc->lock);
2206
2207         return 0;
2208 }
2209
2210 /*----------------------------------------------------------------
2211  * Setup the fsl_ep struct for eps
2212  * Link fsl_ep->ep to gadget->ep_list
2213  * ep0out is not used so do nothing here
2214  * ep0in should be taken care
2215  *--------------------------------------------------------------*/
2216 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2217                 char *name, int link)
2218 {
2219         struct fsl_ep *ep = &udc->eps[index];
2220
2221         ep->udc = udc;
2222         strcpy(ep->name, name);
2223         ep->ep.name = ep->name;
2224
2225         ep->ep.ops = &fsl_ep_ops;
2226         ep->stopped = 0;
2227
2228         /* for ep0: maxP defined in desc
2229          * for other eps, maxP is set by epautoconfig() called by gadget layer
2230          */
2231         ep->ep.maxpacket = (unsigned short) ~0;
2232
2233         /* the queue lists any req for this ep */
2234         INIT_LIST_HEAD(&ep->queue);
2235
2236         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2237         if (link)
2238                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2239         ep->gadget = &udc->gadget;
2240         ep->qh = &udc->ep_qh[index];
2241
2242         return 0;
2243 }
2244
2245 /* Driver probe function
2246  * all intialization operations implemented here except enabling usb_intr reg
2247  * board setup should have been done in the platform code
2248  */
2249 static int __init fsl_udc_probe(struct platform_device *pdev)
2250 {
2251         struct resource *res;
2252         int ret = -ENODEV;
2253         unsigned int i;
2254         u32 dccparams;
2255
2256         if (strcmp(pdev->name, driver_name)) {
2257                 VDBG("Wrong device\n");
2258                 return -ENODEV;
2259         }
2260
2261         udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2262         if (udc_controller == NULL) {
2263                 ERR("malloc udc failed\n");
2264                 return -ENOMEM;
2265         }
2266
2267         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2268         if (!res) {
2269                 kfree(udc_controller);
2270                 return -ENXIO;
2271         }
2272
2273         if (!request_mem_region(res->start, res->end - res->start + 1,
2274                                 driver_name)) {
2275                 ERR("request mem region for %s failed \n", pdev->name);
2276                 kfree(udc_controller);
2277                 return -EBUSY;
2278         }
2279
2280         dr_regs = ioremap(res->start, res->end - res->start + 1);
2281         if (!dr_regs) {
2282                 ret = -ENOMEM;
2283                 goto err1;
2284         }
2285
2286         usb_sys_regs = (struct usb_sys_interface *)
2287                         ((u32)dr_regs + USB_DR_SYS_OFFSET);
2288
2289         /* Read Device Controller Capability Parameters register */
2290         dccparams = fsl_readl(&dr_regs->dccparams);
2291         if (!(dccparams & DCCPARAMS_DC)) {
2292                 ERR("This SOC doesn't support device role\n");
2293                 ret = -ENODEV;
2294                 goto err2;
2295         }
2296         /* Get max device endpoints */
2297         /* DEN is bidirectional ep number, max_ep doubles the number */
2298         udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2299
2300         udc_controller->irq = platform_get_irq(pdev, 0);
2301         if (!udc_controller->irq) {
2302                 ret = -ENODEV;
2303                 goto err2;
2304         }
2305
2306         ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2307                         driver_name, udc_controller);
2308         if (ret != 0) {
2309                 ERR("cannot request irq %d err %d \n",
2310                                 udc_controller->irq, ret);
2311                 goto err2;
2312         }
2313
2314         /* Initialize the udc structure including QH member and other member */
2315         if (struct_udc_setup(udc_controller, pdev)) {
2316                 ERR("Can't initialize udc data structure\n");
2317                 ret = -ENOMEM;
2318                 goto err3;
2319         }
2320
2321         /* initialize usb hw reg except for regs for EP,
2322          * leave usbintr reg untouched */
2323         dr_controller_setup(udc_controller);
2324
2325         /* Setup gadget structure */
2326         udc_controller->gadget.ops = &fsl_gadget_ops;
2327         udc_controller->gadget.is_dualspeed = 1;
2328         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2329         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2330         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2331         udc_controller->gadget.name = driver_name;
2332
2333         /* Setup gadget.dev and register with kernel */
2334         dev_set_name(&udc_controller->gadget.dev, "gadget");
2335         udc_controller->gadget.dev.release = fsl_udc_release;
2336         udc_controller->gadget.dev.parent = &pdev->dev;
2337         ret = device_register(&udc_controller->gadget.dev);
2338         if (ret < 0)
2339                 goto err3;
2340
2341         /* setup QH and epctrl for ep0 */
2342         ep0_setup(udc_controller);
2343
2344         /* setup udc->eps[] for ep0 */
2345         struct_ep_setup(udc_controller, 0, "ep0", 0);
2346         /* for ep0: the desc defined here;
2347          * for other eps, gadget layer called ep_enable with defined desc
2348          */
2349         udc_controller->eps[0].desc = &fsl_ep0_desc;
2350         udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2351
2352         /* setup the udc->eps[] for non-control endpoints and link
2353          * to gadget.ep_list */
2354         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2355                 char name[14];
2356
2357                 sprintf(name, "ep%dout", i);
2358                 struct_ep_setup(udc_controller, i * 2, name, 1);
2359                 sprintf(name, "ep%din", i);
2360                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2361         }
2362
2363         /* use dma_pool for TD management */
2364         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2365                         sizeof(struct ep_td_struct),
2366                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2367         if (udc_controller->td_pool == NULL) {
2368                 ret = -ENOMEM;
2369                 goto err4;
2370         }
2371         create_proc_file();
2372         return 0;
2373
2374 err4:
2375         device_unregister(&udc_controller->gadget.dev);
2376 err3:
2377         free_irq(udc_controller->irq, udc_controller);
2378 err2:
2379         iounmap(dr_regs);
2380 err1:
2381         release_mem_region(res->start, res->end - res->start + 1);
2382         kfree(udc_controller);
2383         return ret;
2384 }
2385
2386 /* Driver removal function
2387  * Free resources and finish pending transactions
2388  */
2389 static int __exit fsl_udc_remove(struct platform_device *pdev)
2390 {
2391         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2392
2393         DECLARE_COMPLETION(done);
2394
2395         if (!udc_controller)
2396                 return -ENODEV;
2397         udc_controller->done = &done;
2398
2399         /* DR has been stopped in usb_gadget_unregister_driver() */
2400         remove_proc_file();
2401
2402         /* Free allocated memory */
2403         kfree(udc_controller->status_req->req.buf);
2404         kfree(udc_controller->status_req);
2405         kfree(udc_controller->eps);
2406
2407         dma_pool_destroy(udc_controller->td_pool);
2408         free_irq(udc_controller->irq, udc_controller);
2409         iounmap(dr_regs);
2410         release_mem_region(res->start, res->end - res->start + 1);
2411
2412         device_unregister(&udc_controller->gadget.dev);
2413         /* free udc --wait for the release() finished */
2414         wait_for_completion(&done);
2415
2416         return 0;
2417 }
2418
2419 /*-----------------------------------------------------------------
2420  * Modify Power management attributes
2421  * Used by OTG statemachine to disable gadget temporarily
2422  -----------------------------------------------------------------*/
2423 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2424 {
2425         dr_controller_stop(udc_controller);
2426         return 0;
2427 }
2428
2429 /*-----------------------------------------------------------------
2430  * Invoked on USB resume. May be called in_interrupt.
2431  * Here we start the DR controller and enable the irq
2432  *-----------------------------------------------------------------*/
2433 static int fsl_udc_resume(struct platform_device *pdev)
2434 {
2435         /* Enable DR irq reg and set controller Run */
2436         if (udc_controller->stopped) {
2437                 dr_controller_setup(udc_controller);
2438                 dr_controller_run(udc_controller);
2439         }
2440         udc_controller->usb_state = USB_STATE_ATTACHED;
2441         udc_controller->ep0_state = WAIT_FOR_SETUP;
2442         udc_controller->ep0_dir = 0;
2443         return 0;
2444 }
2445
2446 /*-------------------------------------------------------------------------
2447         Register entry point for the peripheral controller driver
2448 --------------------------------------------------------------------------*/
2449
2450 static struct platform_driver udc_driver = {
2451         .remove  = __exit_p(fsl_udc_remove),
2452         /* these suspend and resume are not usb suspend and resume */
2453         .suspend = fsl_udc_suspend,
2454         .resume  = fsl_udc_resume,
2455         .driver  = {
2456                 .name = (char *)driver_name,
2457                 .owner = THIS_MODULE,
2458         },
2459 };
2460
2461 static int __init udc_init(void)
2462 {
2463         printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2464         return platform_driver_probe(&udc_driver, fsl_udc_probe);
2465 }
2466
2467 module_init(udc_init);
2468
2469 static void __exit udc_exit(void)
2470 {
2471         platform_driver_unregister(&udc_driver);
2472         printk("%s unregistered \n", driver_desc);
2473 }
2474
2475 module_exit(udc_exit);
2476
2477 MODULE_DESCRIPTION(DRIVER_DESC);
2478 MODULE_AUTHOR(DRIVER_AUTHOR);
2479 MODULE_LICENSE("GPL");
2480 MODULE_ALIAS("platform:fsl-usb2-udc");