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