drivers/usb/gadget/fsl_qe_udc.c

   1 /*
   2  * driver/usb/gadget/fsl_qe_udc.c
   3  *
   4  * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved.
   5  *
   6  *      Xie Xiaobo <X.Xie@freescale.com>
   7  *      Li Yang <leoli@freescale.com>
   8  *      Based on bareboard code from Shlomi Gridish.
   9  *
  10  * Description:
  11  * Freescle QE/CPM USB Pheripheral Controller Driver
  12  * The controller can be found on MPC8360, MPC8272, and etc.
  13  * MPC8360 Rev 1.1 may need QE mircocode update
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License as published by the
  17  * Free Software Foundation;  either version 2 of the License, or (at your
  18  * option) any later version.
  19  */
  20
  21 #undef USB_TRACE
  22
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/init.h>
  26 #include <linux/ioport.h>
  27 #include <linux/types.h>
  28 #include <linux/errno.h>
  29 #include <linux/slab.h>
  30 #include <linux/list.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/io.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/of_platform.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/usb/ch9.h>
  37 #include <linux/usb/gadget.h>
  38 #include <linux/usb/otg.h>
  39 #include <asm/qe.h>
  40 #include <asm/cpm.h>
  41 #include <asm/dma.h>
  42 #include <asm/reg.h>
  43 #include "fsl_qe_udc.h"
  44
  45 #define DRIVER_DESC     "Freescale QE/CPM USB Device Controller driver"
  46 #define DRIVER_AUTHOR   "Xie XiaoBo"
  47 #define DRIVER_VERSION  "1.0"
  48
  49 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  50
  51 static const char driver_name[] = "fsl_qe_udc";
  52 static const char driver_desc[] = DRIVER_DESC;
  53
  54 /*ep name is important in gadget, it should obey the convention of ep_match()*/
  55 static const char *const ep_name[] = {
  56         "ep0-control", /* everyone has ep0 */
  57         /* 3 configurable endpoints */
  58         "ep1",
  59         "ep2",
  60         "ep3",
  61 };
  62
  63 static struct usb_endpoint_descriptor qe_ep0_desc = {
  64         .bLength =              USB_DT_ENDPOINT_SIZE,
  65         .bDescriptorType =      USB_DT_ENDPOINT,
  66
  67         .bEndpointAddress =     0,
  68         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
  69         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
  70 };
  71
  72 /* it is initialized in probe()  */
  73 static struct qe_udc *udc_controller;
  74
  75 /********************************************************************
  76  *      Internal Used Function Start
  77 ********************************************************************/
  78 /*-----------------------------------------------------------------
  79  * done() - retire a request; caller blocked irqs
  80  *--------------------------------------------------------------*/
  81 static void done(struct qe_ep *ep, struct qe_req *req, int status)
  82 {
  83         struct qe_udc *udc = ep->udc;
  84         unsigned char stopped = ep->stopped;
  85
  86         /* the req->queue pointer is used by ep_queue() func, in which
  87          * the request will be added into a udc_ep->queue 'd tail
  88          * so here the req will be dropped from the ep->queue
  89          */
  90         list_del_init(&req->queue);
  91
  92         /* req.status should be set as -EINPROGRESS in ep_queue() */
  93         if (req->req.status == -EINPROGRESS)
  94                 req->req.status = status;
  95         else
  96                 status = req->req.status;
  97
  98         if (req->mapped) {
  99                 dma_unmap_single(udc->gadget.dev.parent,
 100                         req->req.dma, req->req.length,
 101                         ep_is_in(ep)
 102                                 ? DMA_TO_DEVICE
 103                                 : DMA_FROM_DEVICE);
 104                 req->req.dma = DMA_ADDR_INVALID;
 105                 req->mapped = 0;
 106         } else
 107                 dma_sync_single_for_cpu(udc->gadget.dev.parent,
 108                         req->req.dma, req->req.length,
 109                         ep_is_in(ep)
 110                                 ? DMA_TO_DEVICE
 111                                 : DMA_FROM_DEVICE);
 112
 113         if (status && (status != -ESHUTDOWN))
 114                 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
 115                         ep->ep.name, &req->req, status,
 116                         req->req.actual, req->req.length);
 117
 118         /* don't modify queue heads during completion callback */
 119         ep->stopped = 1;
 120         spin_unlock(&udc->lock);
 121
 122         /* this complete() should a func implemented by gadget layer,
 123          * eg fsg->bulk_in_complete() */
 124         if (req->req.complete)
 125                 req->req.complete(&ep->ep, &req->req);
 126
 127         spin_lock(&udc->lock);
 128
 129         ep->stopped = stopped;
 130 }
 131
 132 /*-----------------------------------------------------------------
 133  * nuke(): delete all requests related to this ep
 134  *--------------------------------------------------------------*/
 135 static void nuke(struct qe_ep *ep, int status)
 136 {
 137         /* Whether this eq has request linked */
 138         while (!list_empty(&ep->queue)) {
 139                 struct qe_req *req = NULL;
 140                 req = list_entry(ep->queue.next, struct qe_req, queue);
 141
 142                 done(ep, req, status);
 143         }
 144 }
 145
 146 /*---------------------------------------------------------------------------*
 147  * USB and Endpoint manipulate process, include parameter and register       *
 148  *---------------------------------------------------------------------------*/
 149 /* @value: 1--set stall 0--clean stall */
 150 static int qe_eprx_stall_change(struct qe_ep *ep, int value)
 151 {
 152         u16 tem_usep;
 153         u8 epnum = ep->epnum;
 154         struct qe_udc *udc = ep->udc;
 155
 156         tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
 157         tem_usep = tem_usep & ~USB_RHS_MASK;
 158         if (value == 1)
 159                 tem_usep |= USB_RHS_STALL;
 160         else if (ep->dir == USB_DIR_IN)
 161                 tem_usep |= USB_RHS_IGNORE_OUT;
 162
 163         out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
 164         return 0;
 165 }
 166
 167 static int qe_eptx_stall_change(struct qe_ep *ep, int value)
 168 {
 169         u16 tem_usep;
 170         u8 epnum = ep->epnum;
 171         struct qe_udc *udc = ep->udc;
 172
 173         tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
 174         tem_usep = tem_usep & ~USB_THS_MASK;
 175         if (value == 1)
 176                 tem_usep |= USB_THS_STALL;
 177         else if (ep->dir == USB_DIR_OUT)
 178                 tem_usep |= USB_THS_IGNORE_IN;
 179
 180         out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
 181
 182         return 0;
 183 }
 184
 185 static int qe_ep0_stall(struct qe_udc *udc)
 186 {
 187         qe_eptx_stall_change(&udc->eps[0], 1);
 188         qe_eprx_stall_change(&udc->eps[0], 1);
 189         udc_controller->ep0_state = WAIT_FOR_SETUP;
 190         udc_controller->ep0_dir = 0;
 191         return 0;
 192 }
 193
 194 static int qe_eprx_nack(struct qe_ep *ep)
 195 {
 196         u8 epnum = ep->epnum;
 197         struct qe_udc *udc = ep->udc;
 198
 199         if (ep->state == EP_STATE_IDLE) {
 200                 /* Set the ep's nack */
 201                 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
 202                                 USB_RHS_MASK, USB_RHS_NACK);
 203
 204                 /* Mask Rx and Busy interrupts */
 205                 clrbits16(&udc->usb_regs->usb_usbmr,
 206                                 (USB_E_RXB_MASK | USB_E_BSY_MASK));
 207
 208                 ep->state = EP_STATE_NACK;
 209         }
 210         return 0;
 211 }
 212
 213 static int qe_eprx_normal(struct qe_ep *ep)
 214 {
 215         struct qe_udc *udc = ep->udc;
 216
 217         if (ep->state == EP_STATE_NACK) {
 218                 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
 219                                 USB_RTHS_MASK, USB_THS_IGNORE_IN);
 220
 221                 /* Unmask RX interrupts */
 222                 out_be16(&udc->usb_regs->usb_usber,
 223                                 USB_E_BSY_MASK | USB_E_RXB_MASK);
 224                 setbits16(&udc->usb_regs->usb_usbmr,
 225                                 (USB_E_RXB_MASK | USB_E_BSY_MASK));
 226
 227                 ep->state = EP_STATE_IDLE;
 228                 ep->has_data = 0;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static int qe_ep_cmd_stoptx(struct qe_ep *ep)
 235 {
 236         if (ep->udc->soc_type == PORT_CPM)
 237                 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
 238                                 CPM_USB_STOP_TX_OPCODE);
 239         else
 240                 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
 241                                 ep->epnum, 0);
 242
 243         return 0;
 244 }
 245
 246 static int qe_ep_cmd_restarttx(struct qe_ep *ep)
 247 {
 248         if (ep->udc->soc_type == PORT_CPM)
 249                 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
 250                                 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
 251         else
 252                 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
 253                                 ep->epnum, 0);
 254
 255         return 0;
 256 }
 257
 258 static int qe_ep_flushtxfifo(struct qe_ep *ep)
 259 {
 260         struct qe_udc *udc = ep->udc;
 261         int i;
 262
 263         i = (int)ep->epnum;
 264
 265         qe_ep_cmd_stoptx(ep);
 266         out_8(&udc->usb_regs->usb_uscom,
 267                 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
 268         out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
 269         out_be32(&udc->ep_param[i]->tstate, 0);
 270         out_be16(&udc->ep_param[i]->tbcnt, 0);
 271
 272         ep->c_txbd = ep->txbase;
 273         ep->n_txbd = ep->txbase;
 274         qe_ep_cmd_restarttx(ep);
 275         return 0;
 276 }
 277
 278 static int qe_ep_filltxfifo(struct qe_ep *ep)
 279 {
 280         struct qe_udc *udc = ep->udc;
 281
 282         out_8(&udc->usb_regs->usb_uscom,
 283                         USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
 284         return 0;
 285 }
 286
 287 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
 288 {
 289         struct qe_ep *ep;
 290         u32 bdring_len;
 291         struct qe_bd __iomem *bd;
 292         int i;
 293
 294         ep = &udc->eps[pipe_num];
 295
 296         if (ep->dir == USB_DIR_OUT)
 297                 bdring_len = USB_BDRING_LEN_RX;
 298         else
 299                 bdring_len = USB_BDRING_LEN;
 300
 301         bd = ep->rxbase;
 302         for (i = 0; i < (bdring_len - 1); i++) {
 303                 out_be32((u32 __iomem *)bd, R_E | R_I);
 304                 bd++;
 305         }
 306         out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
 307
 308         bd = ep->txbase;
 309         for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
 310                 out_be32(&bd->buf, 0);
 311                 out_be32((u32 __iomem *)bd, 0);
 312                 bd++;
 313         }
 314         out_be32((u32 __iomem *)bd, T_W);
 315
 316         return 0;
 317 }
 318
 319 static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
 320 {
 321         struct qe_ep *ep;
 322         u16 tmpusep;
 323
 324         ep = &udc->eps[pipe_num];
 325         tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
 326         tmpusep &= ~USB_RTHS_MASK;
 327
 328         switch (ep->dir) {
 329         case USB_DIR_BOTH:
 330                 qe_ep_flushtxfifo(ep);
 331                 break;
 332         case USB_DIR_OUT:
 333                 tmpusep |= USB_THS_IGNORE_IN;
 334                 break;
 335         case USB_DIR_IN:
 336                 qe_ep_flushtxfifo(ep);
 337                 tmpusep |= USB_RHS_IGNORE_OUT;
 338                 break;
 339         default:
 340                 break;
 341         }
 342         out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
 343
 344         qe_epbds_reset(udc, pipe_num);
 345
 346         return 0;
 347 }
 348
 349 static int qe_ep_toggledata01(struct qe_ep *ep)
 350 {
 351         ep->data01 ^= 0x1;
 352         return 0;
 353 }
 354
 355 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
 356 {
 357         struct qe_ep *ep = &udc->eps[pipe_num];
 358         unsigned long tmp_addr = 0;
 359         struct usb_ep_para __iomem *epparam;
 360         int i;
 361         struct qe_bd __iomem *bd;
 362         int bdring_len;
 363
 364         if (ep->dir == USB_DIR_OUT)
 365                 bdring_len = USB_BDRING_LEN_RX;
 366         else
 367                 bdring_len = USB_BDRING_LEN;
 368
 369         epparam = udc->ep_param[pipe_num];
 370         /* alloc multi-ram for BD rings and set the ep parameters */
 371         tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
 372                                 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
 373         out_be16(&epparam->rbase, (u16)tmp_addr);
 374         out_be16(&epparam->tbase, (u16)(tmp_addr +
 375                                 (sizeof(struct qe_bd) * bdring_len)));
 376
 377         out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
 378         out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
 379
 380         ep->rxbase = cpm_muram_addr(tmp_addr);
 381         ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
 382                                 * bdring_len));
 383         ep->n_rxbd = ep->rxbase;
 384         ep->e_rxbd = ep->rxbase;
 385         ep->n_txbd = ep->txbase;
 386         ep->c_txbd = ep->txbase;
 387         ep->data01 = 0; /* data0 */
 388
 389         /* Init TX and RX bds */
 390         bd = ep->rxbase;
 391         for (i = 0; i < bdring_len - 1; i++) {
 392                 out_be32(&bd->buf, 0);
 393                 out_be32((u32 __iomem *)bd, 0);
 394                 bd++;
 395         }
 396         out_be32(&bd->buf, 0);
 397         out_be32((u32 __iomem *)bd, R_W);
 398
 399         bd = ep->txbase;
 400         for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
 401                 out_be32(&bd->buf, 0);
 402                 out_be32((u32 __iomem *)bd, 0);
 403                 bd++;
 404         }
 405         out_be32(&bd->buf, 0);
 406         out_be32((u32 __iomem *)bd, T_W);
 407
 408         return 0;
 409 }
 410
 411 static int qe_ep_rxbd_update(struct qe_ep *ep)
 412 {
 413         unsigned int size;
 414         int i;
 415         unsigned int tmp;
 416         struct qe_bd __iomem *bd;
 417         unsigned int bdring_len;
 418
 419         if (ep->rxbase == NULL)
 420                 return -EINVAL;
 421
 422         bd = ep->rxbase;
 423
 424         ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
 425         if (ep->rxframe == NULL) {
 426                 dev_err(ep->udc->dev, "malloc rxframe failed\n");
 427                 return -ENOMEM;
 428         }
 429
 430         qe_frame_init(ep->rxframe);
 431
 432         if (ep->dir == USB_DIR_OUT)
 433                 bdring_len = USB_BDRING_LEN_RX;
 434         else
 435                 bdring_len = USB_BDRING_LEN;
 436
 437         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
 438         ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
 439         if (ep->rxbuffer == NULL) {
 440                 dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
 441                                 size);
 442                 kfree(ep->rxframe);
 443                 return -ENOMEM;
 444         }
 445
 446         ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
 447         if (ep->rxbuf_d == DMA_ADDR_INVALID) {
 448                 ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
 449                                         ep->rxbuffer,
 450                                         size,
 451                                         DMA_FROM_DEVICE);
 452                 ep->rxbufmap = 1;
 453         } else {
 454                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
 455                                         ep->rxbuf_d, size,
 456                                         DMA_FROM_DEVICE);
 457                 ep->rxbufmap = 0;
 458         }
 459
 460         size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
 461         tmp = ep->rxbuf_d;
 462         tmp = (u32)(((tmp >> 2) << 2) + 4);
 463
 464         for (i = 0; i < bdring_len - 1; i++) {
 465                 out_be32(&bd->buf, tmp);
 466                 out_be32((u32 __iomem *)bd, (R_E | R_I));
 467                 tmp = tmp + size;
 468                 bd++;
 469         }
 470         out_be32(&bd->buf, tmp);
 471         out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
 472
 473         return 0;
 474 }
 475
 476 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
 477 {
 478         struct qe_ep *ep = &udc->eps[pipe_num];
 479         struct usb_ep_para __iomem *epparam;
 480         u16 usep, logepnum;
 481         u16 tmp;
 482         u8 rtfcr = 0;
 483
 484         epparam = udc->ep_param[pipe_num];
 485
 486         usep = 0;
 487         logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 488         usep |= (logepnum << USB_EPNUM_SHIFT);
 489
 490         switch (ep->desc->bmAttributes & 0x03) {
 491         case USB_ENDPOINT_XFER_BULK:
 492                 usep |= USB_TRANS_BULK;
 493                 break;
 494         case USB_ENDPOINT_XFER_ISOC:
 495                 usep |=  USB_TRANS_ISO;
 496                 break;
 497         case USB_ENDPOINT_XFER_INT:
 498                 usep |= USB_TRANS_INT;
 499                 break;
 500         default:
 501                 usep |= USB_TRANS_CTR;
 502                 break;
 503         }
 504
 505         switch (ep->dir) {
 506         case USB_DIR_OUT:
 507                 usep |= USB_THS_IGNORE_IN;
 508                 break;
 509         case USB_DIR_IN:
 510                 usep |= USB_RHS_IGNORE_OUT;
 511                 break;
 512         default:
 513                 break;
 514         }
 515         out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
 516
 517         rtfcr = 0x30;
 518         out_8(&epparam->rbmr, rtfcr);
 519         out_8(&epparam->tbmr, rtfcr);
 520
 521         tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
 522         /* MRBLR must be divisble by 4 */
 523         tmp = (u16)(((tmp >> 2) << 2) + 4);
 524         out_be16(&epparam->mrblr, tmp);
 525
 526         return 0;
 527 }
 528
 529 static int qe_ep_init(struct qe_udc *udc,
 530                       unsigned char pipe_num,
 531                       const struct usb_endpoint_descriptor *desc)
 532 {
 533         struct qe_ep *ep = &udc->eps[pipe_num];
 534         unsigned long flags;
 535         int reval = 0;
 536         u16 max = 0;
 537
 538         max = le16_to_cpu(desc->wMaxPacketSize);
 539
 540         /* check the max package size validate for this endpoint */
 541         /* Refer to USB2.0 spec table 9-13,
 542         */
 543         if (pipe_num != 0) {
 544                 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
 545                 case USB_ENDPOINT_XFER_BULK:
 546                         if (strstr(ep->ep.name, "-iso")
 547                                         || strstr(ep->ep.name, "-int"))
 548                                 goto en_done;
 549                         switch (udc->gadget.speed) {
 550                         case USB_SPEED_HIGH:
 551                         if ((max == 128) || (max == 256) || (max == 512))
 552                                 break;
 553                         default:
 554                                 switch (max) {
 555                                 case 4:
 556                                 case 8:
 557                                 case 16:
 558                                 case 32:
 559                                 case 64:
 560                                         break;
 561                                 default:
 562                                 case USB_SPEED_LOW:
 563                                         goto en_done;
 564                                 }
 565                         }
 566                         break;
 567                 case USB_ENDPOINT_XFER_INT:
 568                         if (strstr(ep->ep.name, "-iso"))        /* bulk is ok */
 569                                 goto en_done;
 570                         switch (udc->gadget.speed) {
 571                         case USB_SPEED_HIGH:
 572                                 if (max <= 1024)
 573                                         break;
 574                         case USB_SPEED_FULL:
 575                                 if (max <= 64)
 576                                         break;
 577                         default:
 578                                 if (max <= 8)
 579                                         break;
 580                                 goto en_done;
 581                         }
 582                         break;
 583                 case USB_ENDPOINT_XFER_ISOC:
 584                         if (strstr(ep->ep.name, "-bulk")
 585                                 || strstr(ep->ep.name, "-int"))
 586                                 goto en_done;
 587                         switch (udc->gadget.speed) {
 588                         case USB_SPEED_HIGH:
 589                                 if (max <= 1024)
 590                                         break;
 591                         case USB_SPEED_FULL:
 592                                 if (max <= 1023)
 593                                         break;
 594                         default:
 595                                 goto en_done;
 596                         }
 597                         break;
 598                 case USB_ENDPOINT_XFER_CONTROL:
 599                         if (strstr(ep->ep.name, "-iso")
 600                                 || strstr(ep->ep.name, "-int"))
 601                                 goto en_done;
 602                         switch (udc->gadget.speed) {
 603                         case USB_SPEED_HIGH:
 604                         case USB_SPEED_FULL:
 605                                 switch (max) {
 606                                 case 1:
 607                                 case 2:
 608                                 case 4:
 609                                 case 8:
 610                                 case 16:
 611                                 case 32:
 612                                 case 64:
 613                                         break;
 614                                 default:
 615                                         goto en_done;
 616                                 }
 617                         case USB_SPEED_LOW:
 618                                 switch (max) {
 619                                 case 1:
 620                                 case 2:
 621                                 case 4:
 622                                 case 8:
 623                                         break;
 624                                 default:
 625                                         goto en_done;
 626                                 }
 627                         default:
 628                                 goto en_done;
 629                         }
 630                         break;
 631
 632                 default:
 633                         goto en_done;
 634                 }
 635         } /* if ep0*/
 636
 637         spin_lock_irqsave(&udc->lock, flags);
 638
 639         /* initialize ep structure */
 640         ep->ep.maxpacket = max;
 641         ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
 642         ep->desc = desc;
 643         ep->stopped = 0;
 644         ep->init = 1;
 645
 646         if (pipe_num == 0) {
 647                 ep->dir = USB_DIR_BOTH;
 648                 udc->ep0_dir = USB_DIR_OUT;
 649                 udc->ep0_state = WAIT_FOR_SETUP;
 650         } else  {
 651                 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
 652                 case USB_DIR_OUT:
 653                         ep->dir = USB_DIR_OUT;
 654                         break;
 655                 case USB_DIR_IN:
 656                         ep->dir = USB_DIR_IN;
 657                 default:
 658                         break;
 659                 }
 660         }
 661
 662         /* hardware special operation */
 663         qe_ep_bd_init(udc, pipe_num);
 664         if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
 665                 reval = qe_ep_rxbd_update(ep);
 666                 if (reval)
 667                         goto en_done1;
 668         }
 669
 670         if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
 671                 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
 672                 if (ep->txframe == NULL) {
 673                         dev_err(udc->dev, "malloc txframe failed\n");
 674                         goto en_done2;
 675                 }
 676                 qe_frame_init(ep->txframe);
 677         }
 678
 679         qe_ep_register_init(udc, pipe_num);
 680
 681         /* Now HW will be NAKing transfers to that EP,
 682          * until a buffer is queued to it. */
 683         spin_unlock_irqrestore(&udc->lock, flags);
 684
 685         return 0;
 686 en_done2:
 687         kfree(ep->rxbuffer);
 688         kfree(ep->rxframe);
 689 en_done1:
 690         spin_unlock_irqrestore(&udc->lock, flags);
 691 en_done:
 692         dev_dbg(udc->dev, "failed to initialize %s\n", ep->ep.name);
 693         return -ENODEV;
 694 }
 695
 696 static inline void qe_usb_enable(void)
 697 {
 698         setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
 699 }
 700
 701 static inline void qe_usb_disable(void)
 702 {
 703         clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
 704 }
 705
 706 /*----------------------------------------------------------------------------*
 707  *              USB and EP basic manipulate function end                      *
 708  *----------------------------------------------------------------------------*/
 709
 710
 711 /******************************************************************************
 712                 UDC transmit and receive process
 713  ******************************************************************************/
 714 static void recycle_one_rxbd(struct qe_ep *ep)
 715 {
 716         u32 bdstatus;
 717
 718         bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
 719         bdstatus = R_I | R_E | (bdstatus & R_W);
 720         out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
 721
 722         if (bdstatus & R_W)
 723                 ep->e_rxbd = ep->rxbase;
 724         else
 725                 ep->e_rxbd++;
 726 }
 727
 728 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
 729 {
 730         u32 bdstatus;
 731         struct qe_bd __iomem *bd, *nextbd;
 732         unsigned char stop = 0;
 733
 734         nextbd = ep->n_rxbd;
 735         bd = ep->e_rxbd;
 736         bdstatus = in_be32((u32 __iomem *)bd);
 737
 738         while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
 739                 bdstatus = R_E | R_I | (bdstatus & R_W);
 740                 out_be32((u32 __iomem *)bd, bdstatus);
 741
 742                 if (bdstatus & R_W)
 743                         bd = ep->rxbase;
 744                 else
 745                         bd++;
 746
 747                 bdstatus = in_be32((u32 __iomem *)bd);
 748                 if (stopatnext && (bd == nextbd))
 749                         stop = 1;
 750         }
 751
 752         ep->e_rxbd = bd;
 753 }
 754
 755 static void ep_recycle_rxbds(struct qe_ep *ep)
 756 {
 757         struct qe_bd __iomem *bd = ep->n_rxbd;
 758         u32 bdstatus;
 759         u8 epnum = ep->epnum;
 760         struct qe_udc *udc = ep->udc;
 761
 762         bdstatus = in_be32((u32 __iomem *)bd);
 763         if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
 764                 bd = ep->rxbase +
 765                                 ((in_be16(&udc->ep_param[epnum]->rbptr) -
 766                                   in_be16(&udc->ep_param[epnum]->rbase))
 767                                  >> 3);
 768                 bdstatus = in_be32((u32 __iomem *)bd);
 769
 770                 if (bdstatus & R_W)
 771                         bd = ep->rxbase;
 772                 else
 773                         bd++;
 774
 775                 ep->e_rxbd = bd;
 776                 recycle_rxbds(ep, 0);
 777                 ep->e_rxbd = ep->n_rxbd;
 778         } else
 779                 recycle_rxbds(ep, 1);
 780
 781         if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
 782                 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
 783
 784         if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
 785                 qe_eprx_normal(ep);
 786
 787         ep->localnack = 0;
 788 }
 789
 790 static void setup_received_handle(struct qe_udc *udc,
 791                                         struct usb_ctrlrequest *setup);
 792 static int qe_ep_rxframe_handle(struct qe_ep *ep);
 793 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
 794 /* when BD PID is setup, handle the packet */
 795 static int ep0_setup_handle(struct qe_udc *udc)
 796 {
 797         struct qe_ep *ep = &udc->eps[0];
 798         struct qe_frame *pframe;
 799         unsigned int fsize;
 800         u8 *cp;
 801
 802         pframe = ep->rxframe;
 803         if ((frame_get_info(pframe) & PID_SETUP)
 804                         && (udc->ep0_state == WAIT_FOR_SETUP)) {
 805                 fsize = frame_get_length(pframe);
 806                 if (unlikely(fsize != 8))
 807                         return -EINVAL;
 808                 cp = (u8 *)&udc->local_setup_buff;
 809                 memcpy(cp, pframe->data, fsize);
 810                 ep->data01 = 1;
 811
 812                 /* handle the usb command base on the usb_ctrlrequest */
 813                 setup_received_handle(udc, &udc->local_setup_buff);
 814                 return 0;
 815         }
 816         return -EINVAL;
 817 }
 818
 819 static int qe_ep0_rx(struct qe_udc *udc)
 820 {
 821         struct qe_ep *ep = &udc->eps[0];
 822         struct qe_frame *pframe;
 823         struct qe_bd __iomem *bd;
 824         u32 bdstatus, length;
 825         u32 vaddr;
 826
 827         pframe = ep->rxframe;
 828
 829         if (ep->dir == USB_DIR_IN) {
 830                 dev_err(udc->dev, "ep0 not a control endpoint\n");
 831                 return -EINVAL;
 832         }
 833
 834         bd = ep->n_rxbd;
 835         bdstatus = in_be32((u32 __iomem *)bd);
 836         length = bdstatus & BD_LENGTH_MASK;
 837
 838         while (!(bdstatus & R_E) && length) {
 839                 if ((bdstatus & R_F) && (bdstatus & R_L)
 840                         && !(bdstatus & R_ERROR)) {
 841                         if (length == USB_CRC_SIZE) {
 842                                 udc->ep0_state = WAIT_FOR_SETUP;
 843                                 dev_vdbg(udc->dev,
 844                                         "receive a ZLP in status phase\n");
 845                         } else {
 846                                 qe_frame_clean(pframe);
 847                                 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
 848                                 frame_set_data(pframe, (u8 *)vaddr);
 849                                 frame_set_length(pframe,
 850                                                 (length - USB_CRC_SIZE));
 851                                 frame_set_status(pframe, FRAME_OK);
 852                                 switch (bdstatus & R_PID) {
 853                                 case R_PID_SETUP:
 854                                         frame_set_info(pframe, PID_SETUP);
 855                                         break;
 856                                 case R_PID_DATA1:
 857                                         frame_set_info(pframe, PID_DATA1);
 858                                         break;
 859                                 default:
 860                                         frame_set_info(pframe, PID_DATA0);
 861                                         break;
 862                                 }
 863
 864                                 if ((bdstatus & R_PID) == R_PID_SETUP)
 865                                         ep0_setup_handle(udc);
 866                                 else
 867                                         qe_ep_rxframe_handle(ep);
 868                         }
 869                 } else {
 870                         dev_err(udc->dev, "The receive frame with error!\n");
 871                 }
 872
 873                 /* note: don't clear the rxbd's buffer address */
 874                 recycle_one_rxbd(ep);
 875
 876                 /* Get next BD */
 877                 if (bdstatus & R_W)
 878                         bd = ep->rxbase;
 879                 else
 880                         bd++;
 881
 882                 bdstatus = in_be32((u32 __iomem *)bd);
 883                 length = bdstatus & BD_LENGTH_MASK;
 884
 885         }
 886
 887         ep->n_rxbd = bd;
 888
 889         return 0;
 890 }
 891
 892 static int qe_ep_rxframe_handle(struct qe_ep *ep)
 893 {
 894         struct qe_frame *pframe;
 895         u8 framepid = 0;
 896         unsigned int fsize;
 897         u8 *cp;
 898         struct qe_req *req;
 899
 900         pframe = ep->rxframe;
 901
 902         if (frame_get_info(pframe) & PID_DATA1)
 903                 framepid = 0x1;
 904
 905         if (framepid != ep->data01) {
 906                 dev_err(ep->udc->dev, "the data01 error!\n");
 907                 return -EIO;
 908         }
 909
 910         fsize = frame_get_length(pframe);
 911         if (list_empty(&ep->queue)) {
 912                 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
 913         } else {
 914                 req = list_entry(ep->queue.next, struct qe_req, queue);
 915
 916                 cp = (u8 *)(req->req.buf) + req->req.actual;
 917                 if (cp) {
 918                         memcpy(cp, pframe->data, fsize);
 919                         req->req.actual += fsize;
 920                         if ((fsize < ep->ep.maxpacket) ||
 921                                         (req->req.actual >= req->req.length)) {
 922                                 if (ep->epnum == 0)
 923                                         ep0_req_complete(ep->udc, req);
 924                                 else
 925                                         done(ep, req, 0);
 926                                 if (list_empty(&ep->queue) && ep->epnum != 0)
 927                                         qe_eprx_nack(ep);
 928                         }
 929                 }
 930         }
 931
 932         qe_ep_toggledata01(ep);
 933
 934         return 0;
 935 }
 936
 937 static void ep_rx_tasklet(unsigned long data)
 938 {
 939         struct qe_udc *udc = (struct qe_udc *)data;
 940         struct qe_ep *ep;
 941         struct qe_frame *pframe;
 942         struct qe_bd __iomem *bd;
 943         unsigned long flags;
 944         u32 bdstatus, length;
 945         u32 vaddr, i;
 946
 947         spin_lock_irqsave(&udc->lock, flags);
 948
 949         for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
 950                 ep = &udc->eps[i];
 951
 952                 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
 953                         dev_dbg(udc->dev,
 954                                 "This is a transmit ep or disable tasklet!\n");
 955                         continue;
 956                 }
 957
 958                 pframe = ep->rxframe;
 959                 bd = ep->n_rxbd;
 960                 bdstatus = in_be32((u32 __iomem *)bd);
 961                 length = bdstatus & BD_LENGTH_MASK;
 962
 963                 while (!(bdstatus & R_E) && length) {
 964                         if (list_empty(&ep->queue)) {
 965                                 qe_eprx_nack(ep);
 966                                 dev_dbg(udc->dev,
 967                                         "The rxep have noreq %d\n",
 968                                         ep->has_data);
 969                                 break;
 970                         }
 971
 972                         if ((bdstatus & R_F) && (bdstatus & R_L)
 973                                 && !(bdstatus & R_ERROR)) {
 974                                 qe_frame_clean(pframe);
 975                                 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
 976                                 frame_set_data(pframe, (u8 *)vaddr);
 977                                 frame_set_length(pframe,
 978                                                 (length - USB_CRC_SIZE));
 979                                 frame_set_status(pframe, FRAME_OK);
 980                                 switch (bdstatus & R_PID) {
 981                                 case R_PID_DATA1:
 982                                         frame_set_info(pframe, PID_DATA1);
 983                                         break;
 984                                 case R_PID_SETUP:
 985                                         frame_set_info(pframe, PID_SETUP);
 986                                         break;
 987                                 default:
 988                                         frame_set_info(pframe, PID_DATA0);
 989                                         break;
 990                                 }
 991                                 /* handle the rx frame */
 992                                 qe_ep_rxframe_handle(ep);
 993                         } else {
 994                                 dev_err(udc->dev,
 995                                         "error in received frame\n");
 996                         }
 997                         /* note: don't clear the rxbd's buffer address */
 998                         /*clear the length */
 999                         out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
1000                         ep->has_data--;
1001                         if (!(ep->localnack))
1002                                 recycle_one_rxbd(ep);
1003
1004                         /* Get next BD */
1005                         if (bdstatus & R_W)
1006                                 bd = ep->rxbase;
1007                         else
1008                                 bd++;
1009
1010                         bdstatus = in_be32((u32 __iomem *)bd);
1011                         length = bdstatus & BD_LENGTH_MASK;
1012                 }
1013
1014                 ep->n_rxbd = bd;
1015
1016                 if (ep->localnack)
1017                         ep_recycle_rxbds(ep);
1018
1019                 ep->enable_tasklet = 0;
1020         } /* for i=1 */
1021
1022         spin_unlock_irqrestore(&udc->lock, flags);
1023 }
1024
1025 static int qe_ep_rx(struct qe_ep *ep)
1026 {
1027         struct qe_udc *udc;
1028         struct qe_frame *pframe;
1029         struct qe_bd __iomem *bd;
1030         u16 swoffs, ucoffs, emptybds;
1031
1032         udc = ep->udc;
1033         pframe = ep->rxframe;
1034
1035         if (ep->dir == USB_DIR_IN) {
1036                 dev_err(udc->dev, "transmit ep in rx function\n");
1037                 return -EINVAL;
1038         }
1039
1040         bd = ep->n_rxbd;
1041
1042         swoffs = (u16)(bd - ep->rxbase);
1043         ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1044                         in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1045         if (swoffs < ucoffs)
1046                 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1047         else
1048                 emptybds = swoffs - ucoffs;
1049
1050         if (emptybds < MIN_EMPTY_BDS) {
1051                 qe_eprx_nack(ep);
1052                 ep->localnack = 1;
1053                 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1054         }
1055         ep->has_data = USB_BDRING_LEN_RX - emptybds;
1056
1057         if (list_empty(&ep->queue)) {
1058                 qe_eprx_nack(ep);
1059                 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1060                                 ep->has_data);
1061                 return 0;
1062         }
1063
1064         tasklet_schedule(&udc->rx_tasklet);
1065         ep->enable_tasklet = 1;
1066
1067         return 0;
1068 }
1069
1070 /* send data from a frame, no matter what tx_req */
1071 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1072 {
1073         struct qe_udc *udc = ep->udc;
1074         struct qe_bd __iomem *bd;
1075         u16 saveusbmr;
1076         u32 bdstatus, pidmask;
1077         u32 paddr;
1078
1079         if (ep->dir == USB_DIR_OUT) {
1080                 dev_err(udc->dev, "receive ep passed to tx function\n");
1081                 return -EINVAL;
1082         }
1083
1084         /* Disable the Tx interrupt */
1085         saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1086         out_be16(&udc->usb_regs->usb_usbmr,
1087                         saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1088
1089         bd = ep->n_txbd;
1090         bdstatus = in_be32((u32 __iomem *)bd);
1091
1092         if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1093                 if (frame_get_length(frame) == 0) {
1094                         frame_set_data(frame, udc->nullbuf);
1095                         frame_set_length(frame, 2);
1096                         frame->info |= (ZLP | NO_CRC);
1097                         dev_vdbg(udc->dev, "the frame size = 0\n");
1098                 }
1099                 paddr = virt_to_phys((void *)frame->data);
1100                 out_be32(&bd->buf, paddr);
1101                 bdstatus = (bdstatus&T_W);
1102                 if (!(frame_get_info(frame) & NO_CRC))
1103                         bdstatus |= T_R | T_I | T_L | T_TC
1104                                         | frame_get_length(frame);
1105                 else
1106                         bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1107
1108                 /* if the packet is a ZLP in status phase */
1109                 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1110                         ep->data01 = 0x1;
1111
1112                 if (ep->data01) {
1113                         pidmask = T_PID_DATA1;
1114                         frame->info |= PID_DATA1;
1115                 } else {
1116                         pidmask = T_PID_DATA0;
1117                         frame->info |= PID_DATA0;
1118                 }
1119                 bdstatus |= T_CNF;
1120                 bdstatus |= pidmask;
1121                 out_be32((u32 __iomem *)bd, bdstatus);
1122                 qe_ep_filltxfifo(ep);
1123
1124                 /* enable the TX interrupt */
1125                 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1126
1127                 qe_ep_toggledata01(ep);
1128                 if (bdstatus & T_W)
1129                         ep->n_txbd = ep->txbase;
1130                 else
1131                         ep->n_txbd++;
1132
1133                 return 0;
1134         } else {
1135                 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1136                 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1137                 return -EBUSY;
1138         }
1139 }
1140
1141 /* when an bd was transmitted, the function can *
1142  * handle the tx_req, not include ep0           */
1143 static int txcomplete(struct qe_ep *ep, unsigned char restart)
1144 {
1145         if (ep->tx_req != NULL) {
1146                 if (!restart) {
1147                         int asent = ep->last;
1148                         ep->sent += asent;
1149                         ep->last -= asent;
1150                 } else {
1151                         ep->last = 0;
1152                 }
1153
1154                 /* a request already were transmitted completely */
1155                 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1156                         ep->tx_req->req.actual = (unsigned int)ep->sent;
1157                         done(ep, ep->tx_req, 0);
1158                         ep->tx_req = NULL;
1159                         ep->last = 0;
1160                         ep->sent = 0;
1161                 }
1162         }
1163
1164         /* we should gain a new tx_req fot this endpoint */
1165         if (ep->tx_req == NULL) {
1166                 if (!list_empty(&ep->queue)) {
1167                         ep->tx_req = list_entry(ep->queue.next, struct qe_req,
1168                                                         queue);
1169                         ep->last = 0;
1170                         ep->sent = 0;
1171                 }
1172         }
1173
1174         return 0;
1175 }
1176
1177 /* give a frame and a tx_req,send some data */
1178 static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
1179 {
1180         unsigned int size;
1181         u8 *buf;
1182
1183         qe_frame_clean(frame);
1184         size = min_t(u32, (ep->tx_req->req.length - ep->sent),
1185                                 ep->ep.maxpacket);
1186         buf = (u8 *)ep->tx_req->req.buf + ep->sent;
1187         if (buf && size) {
1188                 ep->last = size;
1189                 frame_set_data(frame, buf);
1190                 frame_set_length(frame, size);
1191                 frame_set_status(frame, FRAME_OK);
1192                 frame_set_info(frame, 0);
1193                 return qe_ep_tx(ep, frame);
1194         }
1195         return -EIO;
1196 }
1197
1198 /* give a frame struct,send a ZLP */
1199 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1200 {
1201         struct qe_udc *udc = ep->udc;
1202
1203         if (frame == NULL)
1204                 return -ENODEV;
1205
1206         qe_frame_clean(frame);
1207         frame_set_data(frame, (u8 *)udc->nullbuf);
1208         frame_set_length(frame, 2);
1209         frame_set_status(frame, FRAME_OK);
1210         frame_set_info(frame, (ZLP | NO_CRC | infor));
1211
1212         return qe_ep_tx(ep, frame);
1213 }
1214
1215 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1216 {
1217         struct qe_req *req = ep->tx_req;
1218         int reval;
1219
1220         if (req == NULL)
1221                 return -ENODEV;
1222
1223         if ((req->req.length - ep->sent) > 0)
1224                 reval = qe_usb_senddata(ep, frame);
1225         else
1226                 reval = sendnulldata(ep, frame, 0);
1227
1228         return reval;
1229 }
1230
1231 /* if direction is DIR_IN, the status is Device->Host
1232  * if direction is DIR_OUT, the status transaction is Device<-Host
1233  * in status phase, udc create a request and gain status */
1234 static int ep0_prime_status(struct qe_udc *udc, int direction)
1235 {
1236
1237         struct qe_ep *ep = &udc->eps[0];
1238
1239         if (direction == USB_DIR_IN) {
1240                 udc->ep0_state = DATA_STATE_NEED_ZLP;
1241                 udc->ep0_dir = USB_DIR_IN;
1242                 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1243         } else {
1244                 udc->ep0_dir = USB_DIR_OUT;
1245                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1246         }
1247
1248         return 0;
1249 }
1250
1251 /* a request complete in ep0, whether gadget request or udc request */
1252 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1253 {
1254         struct qe_ep *ep = &udc->eps[0];
1255         /* because usb and ep's status already been set in ch9setaddress() */
1256
1257         switch (udc->ep0_state) {
1258         case DATA_STATE_XMIT:
1259                 done(ep, req, 0);
1260                 /* receive status phase */
1261                 if (ep0_prime_status(udc, USB_DIR_OUT))
1262                         qe_ep0_stall(udc);
1263                 break;
1264
1265         case DATA_STATE_NEED_ZLP:
1266                 done(ep, req, 0);
1267                 udc->ep0_state = WAIT_FOR_SETUP;
1268                 break;
1269
1270         case DATA_STATE_RECV:
1271                 done(ep, req, 0);
1272                 /* send status phase */
1273                 if (ep0_prime_status(udc, USB_DIR_IN))
1274                         qe_ep0_stall(udc);
1275                 break;
1276
1277         case WAIT_FOR_OUT_STATUS:
1278                 done(ep, req, 0);
1279                 udc->ep0_state = WAIT_FOR_SETUP;
1280                 break;
1281
1282         case WAIT_FOR_SETUP:
1283                 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1284                 break;
1285
1286         default:
1287                 qe_ep0_stall(udc);
1288                 break;
1289         }
1290 }
1291
1292 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1293 {
1294         struct qe_req *tx_req = NULL;
1295         struct qe_frame *frame = ep->txframe;
1296
1297         if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1298                 if (!restart)
1299                         ep->udc->ep0_state = WAIT_FOR_SETUP;
1300                 else
1301                         sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1302                 return 0;
1303         }
1304
1305         tx_req = ep->tx_req;
1306         if (tx_req != NULL) {
1307                 if (!restart) {
1308                         int asent = ep->last;
1309                         ep->sent += asent;
1310                         ep->last -= asent;
1311                 } else {
1312                         ep->last = 0;
1313                 }
1314
1315                 /* a request already were transmitted completely */
1316                 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1317                         ep->tx_req->req.actual = (unsigned int)ep->sent;
1318                         ep0_req_complete(ep->udc, ep->tx_req);
1319                         ep->tx_req = NULL;
1320                         ep->last = 0;
1321                         ep->sent = 0;
1322                 }
1323         } else {
1324                 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1325         }
1326
1327         return 0;
1328 }
1329
1330 static int ep0_txframe_handle(struct qe_ep *ep)
1331 {
1332         /* if have error, transmit again */
1333         if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1334                 qe_ep_flushtxfifo(ep);
1335                 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1336                 if (frame_get_info(ep->txframe) & PID_DATA0)
1337                         ep->data01 = 0;
1338                 else
1339                         ep->data01 = 1;
1340
1341                 ep0_txcomplete(ep, 1);
1342         } else
1343                 ep0_txcomplete(ep, 0);
1344
1345         frame_create_tx(ep, ep->txframe);
1346         return 0;
1347 }
1348
1349 static int qe_ep0_txconf(struct qe_ep *ep)
1350 {
1351         struct qe_bd __iomem *bd;
1352         struct qe_frame *pframe;
1353         u32 bdstatus;
1354
1355         bd = ep->c_txbd;
1356         bdstatus = in_be32((u32 __iomem *)bd);
1357         while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1358                 pframe = ep->txframe;
1359
1360                 /* clear and recycle the BD */
1361                 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1362                 out_be32(&bd->buf, 0);
1363                 if (bdstatus & T_W)
1364                         ep->c_txbd = ep->txbase;
1365                 else
1366                         ep->c_txbd++;
1367
1368                 if (ep->c_txbd == ep->n_txbd) {
1369                         if (bdstatus & DEVICE_T_ERROR) {
1370                                 frame_set_status(pframe, FRAME_ERROR);
1371                                 if (bdstatus & T_TO)
1372                                         pframe->status |= TX_ER_TIMEOUT;
1373                                 if (bdstatus & T_UN)
1374                                         pframe->status |= TX_ER_UNDERUN;
1375                         }
1376                         ep0_txframe_handle(ep);
1377                 }
1378
1379                 bd = ep->c_txbd;
1380                 bdstatus = in_be32((u32 __iomem *)bd);
1381         }
1382
1383         return 0;
1384 }
1385
1386 static int ep_txframe_handle(struct qe_ep *ep)
1387 {
1388         if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1389                 qe_ep_flushtxfifo(ep);
1390                 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1391                 if (frame_get_info(ep->txframe) & PID_DATA0)
1392                         ep->data01 = 0;
1393                 else
1394                         ep->data01 = 1;
1395
1396                 txcomplete(ep, 1);
1397         } else
1398                 txcomplete(ep, 0);
1399
1400         frame_create_tx(ep, ep->txframe); /* send the data */
1401         return 0;
1402 }
1403
1404 /* confirm the already trainsmited bd */
1405 static int qe_ep_txconf(struct qe_ep *ep)
1406 {
1407         struct qe_bd __iomem *bd;
1408         struct qe_frame *pframe = NULL;
1409         u32 bdstatus;
1410         unsigned char breakonrxinterrupt = 0;
1411
1412         bd = ep->c_txbd;
1413         bdstatus = in_be32((u32 __iomem *)bd);
1414         while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1415                 pframe = ep->txframe;
1416                 if (bdstatus & DEVICE_T_ERROR) {
1417                         frame_set_status(pframe, FRAME_ERROR);
1418                         if (bdstatus & T_TO)
1419                                 pframe->status |= TX_ER_TIMEOUT;
1420                         if (bdstatus & T_UN)
1421                                 pframe->status |= TX_ER_UNDERUN;
1422                 }
1423
1424                 /* clear and recycle the BD */
1425                 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1426                 out_be32(&bd->buf, 0);
1427                 if (bdstatus & T_W)
1428                         ep->c_txbd = ep->txbase;
1429                 else
1430                         ep->c_txbd++;
1431
1432                 /* handle the tx frame */
1433                 ep_txframe_handle(ep);
1434                 bd = ep->c_txbd;
1435                 bdstatus = in_be32((u32 __iomem *)bd);
1436         }
1437         if (breakonrxinterrupt)
1438                 return -EIO;
1439         else
1440                 return 0;
1441 }
1442
1443 /* Add a request in queue, and try to transmit a packet */
1444 static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1445 {
1446         int reval = 0;
1447
1448         if (ep->tx_req == NULL) {
1449                 ep->sent = 0;
1450                 ep->last = 0;
1451                 txcomplete(ep, 0); /* can gain a new tx_req */
1452                 reval = frame_create_tx(ep, ep->txframe);
1453         }
1454         return reval;
1455 }
1456
1457 /* Maybe this is a good ideal */
1458 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1459 {
1460         struct qe_udc *udc = ep->udc;
1461         struct qe_frame *pframe = NULL;
1462         struct qe_bd __iomem *bd;
1463         u32 bdstatus, length;
1464         u32 vaddr, fsize;
1465         u8 *cp;
1466         u8 finish_req = 0;
1467         u8 framepid;
1468
1469         if (list_empty(&ep->queue)) {
1470                 dev_vdbg(udc->dev, "the req already finish!\n");
1471                 return 0;
1472         }
1473         pframe = ep->rxframe;
1474
1475         bd = ep->n_rxbd;
1476         bdstatus = in_be32((u32 __iomem *)bd);
1477         length = bdstatus & BD_LENGTH_MASK;
1478
1479         while (!(bdstatus & R_E) && length) {
1480                 if (finish_req)
1481                         break;
1482                 if ((bdstatus & R_F) && (bdstatus & R_L)
1483                                         && !(bdstatus & R_ERROR)) {
1484                         qe_frame_clean(pframe);
1485                         vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1486                         frame_set_data(pframe, (u8 *)vaddr);
1487                         frame_set_length(pframe, (length - USB_CRC_SIZE));
1488                         frame_set_status(pframe, FRAME_OK);
1489                         switch (bdstatus & R_PID) {
1490                         case R_PID_DATA1:
1491                                 frame_set_info(pframe, PID_DATA1); break;
1492                         default:
1493                                 frame_set_info(pframe, PID_DATA0); break;
1494                         }
1495                         /* handle the rx frame */
1496
1497                         if (frame_get_info(pframe) & PID_DATA1)
1498                                 framepid = 0x1;
1499                         else
1500                                 framepid = 0;
1501
1502                         if (framepid != ep->data01) {
1503                                 dev_vdbg(udc->dev, "the data01 error!\n");
1504                         } else {
1505                                 fsize = frame_get_length(pframe);
1506
1507                                 cp = (u8 *)(req->req.buf) + req->req.actual;
1508                                 if (cp) {
1509                                         memcpy(cp, pframe->data, fsize);
1510                                         req->req.actual += fsize;
1511                                         if ((fsize < ep->ep.maxpacket)
1512                                                 || (req->req.actual >=
1513                                                         req->req.length)) {
1514                                                 finish_req = 1;
1515                                                 done(ep, req, 0);
1516                                                 if (list_empty(&ep->queue))
1517                                                         qe_eprx_nack(ep);
1518                                         }
1519                                 }
1520                                 qe_ep_toggledata01(ep);
1521                         }
1522                 } else {
1523                         dev_err(udc->dev, "The receive frame with error!\n");
1524                 }
1525
1526                 /* note: don't clear the rxbd's buffer address *
1527                  * only Clear the length */
1528                 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1529                 ep->has_data--;
1530
1531                 /* Get next BD */
1532                 if (bdstatus & R_W)
1533                         bd = ep->rxbase;
1534                 else
1535                         bd++;
1536
1537                 bdstatus = in_be32((u32 __iomem *)bd);
1538                 length = bdstatus & BD_LENGTH_MASK;
1539         }
1540
1541         ep->n_rxbd = bd;
1542         ep_recycle_rxbds(ep);
1543
1544         return 0;
1545 }
1546
1547 /* only add the request in queue */
1548 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1549 {
1550         if (ep->state == EP_STATE_NACK) {
1551                 if (ep->has_data <= 0) {
1552                         /* Enable rx and unmask rx interrupt */
1553                         qe_eprx_normal(ep);
1554                 } else {
1555                         /* Copy the exist BD data */
1556                         ep_req_rx(ep, req);
1557                 }
1558         }
1559
1560         return 0;
1561 }
1562
1563 /********************************************************************
1564         Internal Used Function End
1565 ********************************************************************/
1566
1567 /*-----------------------------------------------------------------------
1568         Endpoint Management Functions For Gadget
1569  -----------------------------------------------------------------------*/
1570 static int qe_ep_enable(struct usb_ep *_ep,
1571                          const struct usb_endpoint_descriptor *desc)
1572 {
1573         struct qe_udc *udc;
1574         struct qe_ep *ep;
1575         int retval = 0;
1576         unsigned char epnum;
1577
1578         ep = container_of(_ep, struct qe_ep, ep);
1579
1580         /* catch various bogus parameters */
1581         if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
1582                         (desc->bDescriptorType != USB_DT_ENDPOINT))
1583                 return -EINVAL;
1584
1585         udc = ep->udc;
1586         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1587                 return -ESHUTDOWN;
1588
1589         epnum = (u8)desc->bEndpointAddress & 0xF;
1590
1591         retval = qe_ep_init(udc, epnum, desc);
1592         if (retval != 0) {
1593                 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1594                 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1595                 return -EINVAL;
1596         }
1597         dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1598         return 0;
1599 }
1600
1601 static int qe_ep_disable(struct usb_ep *_ep)
1602 {
1603         struct qe_udc *udc;
1604         struct qe_ep *ep;
1605         unsigned long flags;
1606         unsigned int size;
1607
1608         ep = container_of(_ep, struct qe_ep, ep);
1609         udc = ep->udc;
1610
1611         if (!_ep || !ep->desc) {
1612                 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1613                 return -EINVAL;
1614         }
1615
1616         spin_lock_irqsave(&udc->lock, flags);
1617         /* Nuke all pending requests (does flush) */
1618         nuke(ep, -ESHUTDOWN);
1619         ep->desc = NULL;
1620         ep->stopped = 1;
1621         spin_unlock_irqrestore(&udc->lock, flags);
1622
1623         cpm_muram_free(cpm_muram_offset(ep->rxbase));
1624
1625         if (ep->dir == USB_DIR_OUT)
1626                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1627                                 (USB_BDRING_LEN_RX + 1);
1628         else
1629                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1630                                 (USB_BDRING_LEN + 1);
1631
1632         if (ep->dir != USB_DIR_IN) {
1633                 kfree(ep->rxframe);
1634                 if (ep->rxbufmap) {
1635                         dma_unmap_single(udc_controller->gadget.dev.parent,
1636                                         ep->rxbuf_d, size,
1637                                         DMA_FROM_DEVICE);
1638                         ep->rxbuf_d = DMA_ADDR_INVALID;
1639                 } else {
1640                         dma_sync_single_for_cpu(
1641                                         udc_controller->gadget.dev.parent,
1642                                         ep->rxbuf_d, size,
1643                                         DMA_FROM_DEVICE);
1644                 }
1645                 kfree(ep->rxbuffer);
1646         }
1647
1648         if (ep->dir != USB_DIR_OUT)
1649                 kfree(ep->txframe);
1650
1651         dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1652         return 0;
1653 }
1654
1655 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1656 {
1657         struct qe_req *req;
1658
1659         req = kzalloc(sizeof(*req), gfp_flags);
1660         if (!req)
1661                 return NULL;
1662
1663         req->req.dma = DMA_ADDR_INVALID;
1664
1665         INIT_LIST_HEAD(&req->queue);
1666
1667         return &req->req;
1668 }
1669
1670 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1671 {
1672         struct qe_req *req;
1673
1674         req = container_of(_req, struct qe_req, req);
1675
1676         if (_req)
1677                 kfree(req);
1678 }
1679
1680 /* queues (submits) an I/O request to an endpoint */
1681 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1682                                 gfp_t gfp_flags)
1683 {
1684         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1685         struct qe_req *req = container_of(_req, struct qe_req, req);
1686         struct qe_udc *udc;
1687         unsigned long flags;
1688         int reval;
1689
1690         udc = ep->udc;
1691         /* catch various bogus parameters */
1692         if (!_req || !req->req.complete || !req->req.buf
1693                         || !list_empty(&req->queue)) {
1694                 dev_dbg(udc->dev, "bad params\n");
1695                 return -EINVAL;
1696         }
1697         if (!_ep || (!ep->desc && ep_index(ep))) {
1698                 dev_dbg(udc->dev, "bad ep\n");
1699                 return -EINVAL;
1700         }
1701
1702         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1703                 return -ESHUTDOWN;
1704
1705         req->ep = ep;
1706
1707         /* map virtual address to hardware */
1708         if (req->req.dma == DMA_ADDR_INVALID) {
1709                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1710                                         req->req.buf,
1711                                         req->req.length,
1712                                         ep_is_in(ep)
1713                                         ? DMA_TO_DEVICE :
1714                                         DMA_FROM_DEVICE);
1715                 req->mapped = 1;
1716         } else {
1717                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1718                                         req->req.dma, req->req.length,
1719                                         ep_is_in(ep)
1720                                         ? DMA_TO_DEVICE :
1721                                         DMA_FROM_DEVICE);
1722                 req->mapped = 0;
1723         }
1724
1725         req->req.status = -EINPROGRESS;
1726         req->req.actual = 0;
1727
1728         list_add_tail(&req->queue, &ep->queue);
1729         dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1730                         ep->name, req->req.length);
1731         spin_lock_irqsave(&udc->lock, flags);
1732         /* push the request to device */
1733         if (ep_is_in(ep))
1734                 reval = ep_req_send(ep, req);
1735
1736         /* EP0 */
1737         if (ep_index(ep) == 0 && req->req.length > 0) {
1738                 if (ep_is_in(ep))
1739                         udc->ep0_state = DATA_STATE_XMIT;
1740                 else
1741                         udc->ep0_state = DATA_STATE_RECV;
1742         }
1743
1744         if (ep->dir == USB_DIR_OUT)
1745                 reval = ep_req_receive(ep, req);
1746
1747         spin_unlock_irqrestore(&udc->lock, flags);
1748
1749         return 0;
1750 }
1751
1752 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1753 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1754 {
1755         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1756         struct qe_req *req;
1757         unsigned long flags;
1758
1759         if (!_ep || !_req)
1760                 return -EINVAL;
1761
1762         spin_lock_irqsave(&ep->udc->lock, flags);
1763
1764         /* make sure it's actually queued on this endpoint */
1765         list_for_each_entry(req, &ep->queue, queue) {
1766                 if (&req->req == _req)
1767                         break;
1768         }
1769
1770         if (&req->req != _req) {
1771                 spin_unlock_irqrestore(&ep->udc->lock, flags);
1772                 return -EINVAL;
1773         }
1774
1775         done(ep, req, -ECONNRESET);
1776
1777         spin_unlock_irqrestore(&ep->udc->lock, flags);
1778         return 0;
1779 }
1780
1781 /*-----------------------------------------------------------------
1782  * modify the endpoint halt feature
1783  * @ep: the non-isochronous endpoint being stalled
1784  * @value: 1--set halt  0--clear halt
1785  * Returns zero, or a negative error code.
1786 *----------------------------------------------------------------*/
1787 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1788 {
1789         struct qe_ep *ep;
1790         unsigned long flags;
1791         int status = -EOPNOTSUPP;
1792         struct qe_udc *udc;
1793
1794         ep = container_of(_ep, struct qe_ep, ep);
1795         if (!_ep || !ep->desc) {
1796                 status = -EINVAL;
1797                 goto out;
1798         }
1799
1800         if (ep->epnum != 0) {
1801                 status = 0;
1802                 goto out;
1803         }
1804
1805         udc = ep->udc;
1806         /* Attempt to halt IN ep will fail if any transfer requests
1807          * are still queue */
1808         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1809                 status = -EAGAIN;
1810                 goto out;
1811         }
1812
1813         status = 0;
1814         spin_lock_irqsave(&ep->udc->lock, flags);
1815         qe_eptx_stall_change(ep, value);
1816         qe_eprx_stall_change(ep, value);
1817         spin_unlock_irqrestore(&ep->udc->lock, flags);
1818
1819         if (ep->epnum == 0) {
1820                 udc->ep0_state = WAIT_FOR_SETUP;
1821                 udc->ep0_dir = 0;
1822         }
1823 out:
1824         dev_vdbg(udc->dev, " %s %s halt stat %d\n", ep->ep.name,
1825                         value ?  "set" : "clear", status);
1826
1827         return status;
1828 }
1829
1830 static struct usb_ep_ops qe_ep_ops = {
1831         .enable = qe_ep_enable,
1832         .disable = qe_ep_disable,
1833
1834         .alloc_request = qe_alloc_request,
1835         .free_request = qe_free_request,
1836
1837         .queue = qe_ep_queue,
1838         .dequeue = qe_ep_dequeue,
1839
1840         .set_halt = qe_ep_set_halt,
1841 };
1842
1843 /*------------------------------------------------------------------------
1844         Gadget Driver Layer Operations
1845  ------------------------------------------------------------------------*/
1846
1847 /* Get the current frame number */
1848 static int qe_get_frame(struct usb_gadget *gadget)
1849 {
1850         u16 tmp;
1851
1852         tmp = in_be16(&udc_controller->usb_param->frame_n);
1853         if (tmp & 0x8000)
1854                 tmp = tmp & 0x07ff;
1855         else
1856                 tmp = -EINVAL;
1857
1858         return (int)tmp;
1859 }
1860
1861 /* Tries to wake up the host connected to this gadget
1862  *
1863  * Return : 0-success
1864  * Negative-this feature not enabled by host or not supported by device hw
1865  */
1866 static int qe_wakeup(struct usb_gadget *gadget)
1867 {
1868         return -ENOTSUPP;
1869 }
1870
1871 /* Notify controller that VBUS is powered, Called by whatever
1872    detects VBUS sessions */
1873 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1874 {
1875         return -ENOTSUPP;
1876 }
1877
1878 /* constrain controller's VBUS power usage
1879  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1880  * reporting how much power the device may consume.  For example, this
1881  * could affect how quickly batteries are recharged.
1882  *
1883  * Returns zero on success, else negative errno.
1884  */
1885 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1886 {
1887         return -ENOTSUPP;
1888 }
1889
1890 /* Change Data+ pullup status
1891  * this func is used by usb_gadget_connect/disconnect
1892  */
1893 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1894 {
1895         return -ENOTSUPP;
1896 }
1897
1898 /* defined in usb_gadget.h */
1899 static struct usb_gadget_ops qe_gadget_ops = {
1900         .get_frame = qe_get_frame,
1901         .wakeup = qe_wakeup,
1902 /*      .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1903         .vbus_session = qe_vbus_session,
1904         .vbus_draw = qe_vbus_draw,
1905         .pullup = qe_pullup,
1906 };
1907
1908 /*-------------------------------------------------------------------------
1909         USB ep0 Setup process in BUS Enumeration
1910  -------------------------------------------------------------------------*/
1911 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1912 {
1913         struct qe_ep *ep = &udc->eps[pipe];
1914
1915         nuke(ep, -ECONNRESET);
1916         ep->tx_req = NULL;
1917         return 0;
1918 }
1919
1920 static int reset_queues(struct qe_udc *udc)
1921 {
1922         u8 pipe;
1923
1924         for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1925                 udc_reset_ep_queue(udc, pipe);
1926
1927         /* report disconnect; the driver is already quiesced */
1928         spin_unlock(&udc->lock);
1929         udc->driver->disconnect(&udc->gadget);
1930         spin_lock(&udc->lock);
1931
1932         return 0;
1933 }
1934
1935 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1936                         u16 length)
1937 {
1938         /* Save the new address to device struct */
1939         udc->device_address = (u8) value;
1940         /* Update usb state */
1941         udc->usb_state = USB_STATE_ADDRESS;
1942
1943         /* Status phase , send a ZLP */
1944         if (ep0_prime_status(udc, USB_DIR_IN))
1945                 qe_ep0_stall(udc);
1946 }
1947
1948 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1949 {
1950         struct qe_req *req = container_of(_req, struct qe_req, req);
1951
1952         req->req.buf = NULL;
1953         kfree(req);
1954 }
1955
1956 static void ch9getstatus(struct qe_udc *udc, u16 value, u16 index,
1957                          u16 length)
1958 {
1959         u16 usb_status = 0;     /* fix me to give correct status */
1960
1961         struct qe_req *req;
1962         struct qe_ep *ep;
1963         int status = 0;
1964
1965         ep = &udc->eps[0];
1966
1967         req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
1968                                         struct qe_req, req);
1969         req->req.length = 2;
1970         req->req.buf = udc->nullbuf;
1971         memcpy(req->req.buf, (u8 *)&usb_status, 2);
1972         req->req.status = -EINPROGRESS;
1973         req->req.actual = 0;
1974         req->req.complete = ownercomplete;
1975
1976         udc->ep0_dir = USB_DIR_IN;
1977
1978         /* data phase */
1979         status = qe_ep_queue(&ep->ep, &req->req, GFP_ATOMIC);
1980
1981         if (status) {
1982                 dev_err(udc->dev, "Can't respond to getstatus request \n");
1983                 qe_ep0_stall(udc);
1984         }
1985 }
1986
1987 /* only handle the setup request, suppose the device in normal status */
1988 static void setup_received_handle(struct qe_udc *udc,
1989                                 struct usb_ctrlrequest *setup)
1990 {
1991         /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
1992         u16 wValue = le16_to_cpu(setup->wValue);
1993         u16 wIndex = le16_to_cpu(setup->wIndex);
1994         u16 wLength = le16_to_cpu(setup->wLength);
1995
1996         /* clear the previous request in the ep0 */
1997         udc_reset_ep_queue(udc, 0);
1998
1999         if (setup->bRequestType & USB_DIR_IN)
2000                 udc->ep0_dir = USB_DIR_IN;
2001         else
2002                 udc->ep0_dir = USB_DIR_OUT;
2003
2004         switch (setup->bRequest) {
2005         case USB_REQ_GET_STATUS:
2006                 /* Data+Status phase form udc */
2007                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2008                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
2009                         break;
2010                 ch9getstatus(udc, wValue, wIndex, wLength);
2011                 return;
2012
2013         case USB_REQ_SET_ADDRESS:
2014                 /* Status phase from udc */
2015                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2016                                                 USB_RECIP_DEVICE))
2017                         break;
2018                 ch9setaddress(udc, wValue, wIndex, wLength);
2019                 return;
2020
2021         case USB_REQ_CLEAR_FEATURE:
2022         case USB_REQ_SET_FEATURE:
2023                 /* Requests with no data phase, status phase from udc */
2024                 if ((setup->bRequestType &  USB_TYPE_MASK)
2025                                         != USB_TYPE_STANDARD)
2026                         break;
2027
2028                 if ((setup->bRequestType & USB_RECIP_MASK)
2029                                 == USB_RECIP_ENDPOINT) {
2030                         int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2031                         struct qe_ep *ep;
2032
2033                         if (wValue != 0 || wLength != 0
2034                                 || pipe > USB_MAX_ENDPOINTS)
2035                                 break;
2036                         ep = &udc->eps[pipe];
2037
2038                         spin_unlock(&udc->lock);
2039                         qe_ep_set_halt(&ep->ep,
2040                                         (setup->bRequest == USB_REQ_SET_FEATURE)
2041                                                 ? 1 : 0);
2042                         spin_lock(&udc->lock);
2043                 }
2044
2045                 ep0_prime_status(udc, USB_DIR_IN);
2046
2047                 return;
2048
2049         default:
2050                 break;
2051         }
2052
2053         if (wLength) {
2054                 /* Data phase from gadget, status phase from udc */
2055                 if (setup->bRequestType & USB_DIR_IN) {
2056                         udc->ep0_state = DATA_STATE_XMIT;
2057                         udc->ep0_dir = USB_DIR_IN;
2058                 } else{
2059                         udc->ep0_state = DATA_STATE_RECV;
2060                         udc->ep0_dir = USB_DIR_OUT;
2061                 }
2062                 spin_unlock(&udc->lock);
2063                 if (udc->driver->setup(&udc->gadget,
2064                                         &udc->local_setup_buff) < 0)
2065                         qe_ep0_stall(udc);
2066                 spin_lock(&udc->lock);
2067         } else {
2068                 /* No data phase, IN status from gadget */
2069                 udc->ep0_dir = USB_DIR_IN;
2070                 spin_unlock(&udc->lock);
2071                 if (udc->driver->setup(&udc->gadget,
2072                                         &udc->local_setup_buff) < 0)
2073                         qe_ep0_stall(udc);
2074                 spin_lock(&udc->lock);
2075                 udc->ep0_state = DATA_STATE_NEED_ZLP;
2076         }
2077 }
2078
2079 /*-------------------------------------------------------------------------
2080         USB Interrupt handlers
2081  -------------------------------------------------------------------------*/
2082 static void suspend_irq(struct qe_udc *udc)
2083 {
2084         udc->resume_state = udc->usb_state;
2085         udc->usb_state = USB_STATE_SUSPENDED;
2086
2087         /* report suspend to the driver ,serial.c not support this*/
2088         if (udc->driver->suspend)
2089                 udc->driver->suspend(&udc->gadget);
2090 }
2091
2092 static void resume_irq(struct qe_udc *udc)
2093 {
2094         udc->usb_state = udc->resume_state;
2095         udc->resume_state = 0;
2096
2097         /* report resume to the driver , serial.c not support this*/
2098         if (udc->driver->resume)
2099                 udc->driver->resume(&udc->gadget);
2100 }
2101
2102 static void idle_irq(struct qe_udc *udc)
2103 {
2104         u8 usbs;
2105
2106         usbs = in_8(&udc->usb_regs->usb_usbs);
2107         if (usbs & USB_IDLE_STATUS_MASK) {
2108                 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2109                         suspend_irq(udc);
2110         } else {
2111                 if (udc->usb_state == USB_STATE_SUSPENDED)
2112                         resume_irq(udc);
2113         }
2114 }
2115
2116 static int reset_irq(struct qe_udc *udc)
2117 {
2118         unsigned char i;
2119
2120         qe_usb_disable();
2121         out_8(&udc->usb_regs->usb_usadr, 0);
2122
2123         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2124                 if (udc->eps[i].init)
2125                         qe_ep_reset(udc, i);
2126         }
2127
2128         reset_queues(udc);
2129         udc->usb_state = USB_STATE_DEFAULT;
2130         udc->ep0_state = WAIT_FOR_SETUP;
2131         udc->ep0_dir = USB_DIR_OUT;
2132         qe_usb_enable();
2133         return 0;
2134 }
2135
2136 static int bsy_irq(struct qe_udc *udc)
2137 {
2138         return 0;
2139 }
2140
2141 static int txe_irq(struct qe_udc *udc)
2142 {
2143         return 0;
2144 }
2145
2146 /* ep0 tx interrupt also in here */
2147 static int tx_irq(struct qe_udc *udc)
2148 {
2149         struct qe_ep *ep;
2150         struct qe_bd __iomem *bd;
2151         int i, res = 0;
2152
2153         if ((udc->usb_state == USB_STATE_ADDRESS)
2154                 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2155                 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2156
2157         for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2158                 ep = &udc->eps[i];
2159                 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2160                         bd = ep->c_txbd;
2161                         if (!(in_be32((u32 __iomem *)bd) & T_R)
2162                                                 && (in_be32(&bd->buf))) {
2163                                 /* Disable the TX Interrupt */
2164                                 /*confirm the transmitted bd*/
2165                                 if (ep->epnum == 0)
2166                                         res = qe_ep0_txconf(ep);
2167                                 else
2168                                         res = qe_ep_txconf(ep);
2169                                 /* Enable the TX Interrupt */
2170                         }
2171                 }
2172         }
2173         return res;
2174 }
2175
2176
2177 /* setup packect's rx is handle in the function too */
2178 static void rx_irq(struct qe_udc *udc)
2179 {
2180         struct qe_ep *ep;
2181         struct qe_bd __iomem *bd;
2182         int i;
2183
2184         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2185                 ep = &udc->eps[i];
2186                 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2187                         bd = ep->n_rxbd;
2188                         if (!(in_be32((u32 __iomem *)bd) & R_E)
2189                                                 && (in_be32(&bd->buf))) {
2190                                 if (ep->epnum == 0) {
2191                                         qe_ep0_rx(udc);
2192                                 } else {
2193                                         /*non-setup package receive*/
2194                                         qe_ep_rx(ep);
2195                                 }
2196                         }
2197                 }
2198         }
2199 }
2200
2201 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2202 {
2203         struct qe_udc *udc = (struct qe_udc *)_udc;
2204         u16 irq_src;
2205         irqreturn_t status = IRQ_NONE;
2206         unsigned long flags;
2207
2208
2209         spin_lock_irqsave(&udc->lock, flags);
2210
2211         irq_src = in_be16(&udc->usb_regs->usb_usber) &
2212                 in_be16(&udc->usb_regs->usb_usbmr);
2213         /* Clear notification bits */
2214         out_be16(&udc->usb_regs->usb_usber, irq_src);
2215         /* USB Interrupt */
2216         if (irq_src & USB_E_IDLE_MASK) {
2217                 idle_irq(udc);
2218                 irq_src &= ~USB_E_IDLE_MASK;
2219                 status = IRQ_HANDLED;
2220         }
2221
2222         if (irq_src & USB_E_TXB_MASK) {
2223                 tx_irq(udc);
2224                 irq_src &= ~USB_E_TXB_MASK;
2225                 status = IRQ_HANDLED;
2226         }
2227
2228         if (irq_src & USB_E_RXB_MASK) {
2229                 rx_irq(udc);
2230                 irq_src &= ~USB_E_RXB_MASK;
2231                 status = IRQ_HANDLED;
2232         }
2233
2234         if (irq_src & USB_E_RESET_MASK) {
2235                 reset_irq(udc);
2236                 irq_src &= ~USB_E_RESET_MASK;
2237                 status = IRQ_HANDLED;
2238         }
2239
2240         if (irq_src & USB_E_BSY_MASK) {
2241                 bsy_irq(udc);
2242                 irq_src &= ~USB_E_BSY_MASK;
2243                 status = IRQ_HANDLED;
2244         }
2245
2246         if (irq_src & USB_E_TXE_MASK) {
2247                 txe_irq(udc);
2248                 irq_src &= ~USB_E_TXE_MASK;
2249                 status = IRQ_HANDLED;
2250         }
2251
2252         spin_unlock_irqrestore(&udc->lock, flags);
2253
2254         return status;
2255 }
2256
2257 /*-------------------------------------------------------------------------
2258         Gadget driver register and unregister.
2259  --------------------------------------------------------------------------*/
2260 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2261 {
2262         int retval;
2263         unsigned long flags = 0;
2264
2265         /* standard operations */
2266         if (!udc_controller)
2267                 return -ENODEV;
2268
2269         if (!driver || (driver->speed != USB_SPEED_FULL
2270                         && driver->speed != USB_SPEED_HIGH)
2271                         || !driver->bind || !driver->disconnect
2272                         || !driver->setup)
2273                 return -EINVAL;
2274
2275         if (udc_controller->driver)
2276                 return -EBUSY;
2277
2278         /* lock is needed but whether should use this lock or another */
2279         spin_lock_irqsave(&udc_controller->lock, flags);
2280
2281         driver->driver.bus = NULL;
2282         /* hook up the driver */
2283         udc_controller->driver = driver;
2284         udc_controller->gadget.dev.driver = &driver->driver;
2285         udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2286         spin_unlock_irqrestore(&udc_controller->lock, flags);
2287
2288         retval = driver->bind(&udc_controller->gadget);
2289         if (retval) {
2290                 dev_err(udc_controller->dev, "bind to %s --> %d",
2291                                 driver->driver.name, retval);
2292                 udc_controller->gadget.dev.driver = NULL;
2293                 udc_controller->driver = NULL;
2294                 return retval;
2295         }
2296
2297         /* Enable IRQ reg and Set usbcmd reg EN bit */
2298         qe_usb_enable();
2299
2300         out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2301         out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2302         udc_controller->usb_state = USB_STATE_ATTACHED;
2303         udc_controller->ep0_state = WAIT_FOR_SETUP;
2304         udc_controller->ep0_dir = USB_DIR_OUT;
2305         dev_info(udc_controller->dev, "%s bind to driver %s \n",
2306                 udc_controller->gadget.name, driver->driver.name);
2307         return 0;
2308 }
2309 EXPORT_SYMBOL(usb_gadget_register_driver);
2310
2311 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2312 {
2313         struct qe_ep *loop_ep;
2314         unsigned long flags;
2315
2316         if (!udc_controller)
2317                 return -ENODEV;
2318
2319         if (!driver || driver != udc_controller->driver)
2320                 return -EINVAL;
2321
2322         /* stop usb controller, disable intr */
2323         qe_usb_disable();
2324
2325         /* in fact, no needed */
2326         udc_controller->usb_state = USB_STATE_ATTACHED;
2327         udc_controller->ep0_state = WAIT_FOR_SETUP;
2328         udc_controller->ep0_dir = 0;
2329
2330         /* stand operation */
2331         spin_lock_irqsave(&udc_controller->lock, flags);
2332         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2333         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2334         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2335                                 ep.ep_list)
2336                 nuke(loop_ep, -ESHUTDOWN);
2337         spin_unlock_irqrestore(&udc_controller->lock, flags);
2338
2339         /* unbind gadget and unhook driver. */
2340         driver->unbind(&udc_controller->gadget);
2341         udc_controller->gadget.dev.driver = NULL;
2342         udc_controller->driver = NULL;
2343
2344         dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2345                         driver->driver.name);
2346         return 0;
2347 }
2348 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2349
2350 /* udc structure's alloc and setup, include ep-param alloc */
2351 static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
2352 {
2353         struct qe_udc *udc;
2354         struct device_node *np = ofdev->node;
2355         unsigned int tmp_addr = 0;
2356         struct usb_device_para __iomem *usbpram;
2357         unsigned int i;
2358         u64 size;
2359         u32 offset;
2360
2361         udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2362         if (udc == NULL) {
2363                 dev_err(&ofdev->dev, "malloc udc failed\n");
2364                 goto cleanup;
2365         }
2366
2367         udc->dev = &ofdev->dev;
2368
2369         /* get default address of usb parameter in MURAM from device tree */
2370         offset = *of_get_address(np, 1, &size, NULL);
2371         udc->usb_param = cpm_muram_addr(offset);
2372         memset_io(udc->usb_param, 0, size);
2373
2374         usbpram = udc->usb_param;
2375         out_be16(&usbpram->frame_n, 0);
2376         out_be32(&usbpram->rstate, 0);
2377
2378         tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2379                                         sizeof(struct usb_ep_para)),
2380                                            USB_EP_PARA_ALIGNMENT);
2381
2382         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2383                 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2384                 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2385                 tmp_addr += 32;
2386         }
2387
2388         memset_io(udc->ep_param[0], 0,
2389                         USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2390
2391         udc->resume_state = USB_STATE_NOTATTACHED;
2392         udc->usb_state = USB_STATE_POWERED;
2393         udc->ep0_dir = 0;
2394
2395         spin_lock_init(&udc->lock);
2396         return udc;
2397
2398 cleanup:
2399         kfree(udc);
2400         return NULL;
2401 }
2402
2403 /* USB Controller register init */
2404 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2405 {
2406         struct usb_ctlr __iomem *qe_usbregs;
2407         qe_usbregs = udc->usb_regs;
2408
2409         /* Init the usb register */
2410         out_8(&qe_usbregs->usb_usmod, 0x01);
2411         out_be16(&qe_usbregs->usb_usbmr, 0);
2412         out_8(&qe_usbregs->usb_uscom, 0);
2413         out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2414
2415         return 0;
2416 }
2417
2418 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2419 {
2420         struct qe_ep *ep = &udc->eps[pipe_num];
2421
2422         ep->udc = udc;
2423         strcpy(ep->name, ep_name[pipe_num]);
2424         ep->ep.name = ep_name[pipe_num];
2425
2426         ep->ep.ops = &qe_ep_ops;
2427         ep->stopped = 1;
2428         ep->ep.maxpacket = (unsigned short) ~0;
2429         ep->desc = NULL;
2430         ep->dir = 0xff;
2431         ep->epnum = (u8)pipe_num;
2432         ep->sent = 0;
2433         ep->last = 0;
2434         ep->init = 0;
2435         ep->rxframe = NULL;
2436         ep->txframe = NULL;
2437         ep->tx_req = NULL;
2438         ep->state = EP_STATE_IDLE;
2439         ep->has_data = 0;
2440
2441         /* the queue lists any req for this ep */
2442         INIT_LIST_HEAD(&ep->queue);
2443
2444         /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2445         if (pipe_num != 0)
2446                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2447
2448         ep->gadget = &udc->gadget;
2449
2450         return 0;
2451 }
2452
2453 /*-----------------------------------------------------------------------
2454  *      UDC device Driver operation functions                           *
2455  *----------------------------------------------------------------------*/
2456 static void qe_udc_release(struct device *dev)
2457 {
2458         int i = 0;
2459
2460         complete(udc_controller->done);
2461         cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2462         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2463                 udc_controller->ep_param[i] = NULL;
2464
2465         kfree(udc_controller);
2466         udc_controller = NULL;
2467 }
2468
2469 /* Driver probe functions */
2470 static int __devinit qe_udc_probe(struct of_device *ofdev,
2471                         const struct of_device_id *match)
2472 {
2473         struct device_node *np = ofdev->node;
2474         struct qe_ep *ep;
2475         unsigned int ret = 0;
2476         unsigned int i;
2477         const void *prop;
2478
2479         prop = of_get_property(np, "mode", NULL);
2480         if (!prop || strcmp(prop, "peripheral"))
2481                 return -ENODEV;
2482
2483         /* Initialize the udc structure including QH member and other member */
2484         udc_controller = qe_udc_config(ofdev);
2485         if (!udc_controller) {
2486                 dev_dbg(&ofdev->dev, "udc_controll is NULL\n");
2487                 return -ENOMEM;
2488         }
2489
2490         udc_controller->soc_type = (unsigned long)match->data;
2491         udc_controller->usb_regs = of_iomap(np, 0);
2492         if (!udc_controller->usb_regs) {
2493                 ret = -ENOMEM;
2494                 goto err1;
2495         }
2496
2497         /* initialize usb hw reg except for regs for EP,
2498          * leave usbintr reg untouched*/
2499         qe_udc_reg_init(udc_controller);
2500
2501         /* here comes the stand operations for probe
2502          * set the qe_udc->gadget.xxx */
2503         udc_controller->gadget.ops = &qe_gadget_ops;
2504
2505         /* gadget.ep0 is a pointer */
2506         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2507
2508         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2509
2510         /* modify in register gadget process */
2511         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2512
2513         /* name: Identifies the controller hardware type. */
2514         udc_controller->gadget.name = driver_name;
2515
2516         device_initialize(&udc_controller->gadget.dev);
2517
2518         strcpy(udc_controller->gadget.dev.bus_id, "gadget");
2519
2520         udc_controller->gadget.dev.release = qe_udc_release;
2521         udc_controller->gadget.dev.parent = &ofdev->dev;
2522
2523
2524         /* EP:intialization qe_ep struct */
2525         for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2526                 /*because the ep type isn't decide here so
2527                  * qe_ep_init() should be called in ep_enable() */
2528
2529                 /* setup the qe_ep struct and link ep.ep.list
2530                  * into gadget.ep_list */
2531                 qe_ep_config(udc_controller, (unsigned char)i);
2532         }
2533
2534         /* ep0 initialization in here */
2535         ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2536         if (ret)
2537                 goto err2;
2538
2539         /* create a buf for ZLP send */
2540         udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2541         if (udc_controller->nullbuf == NULL) {
2542                 dev_dbg(udc_controller->dev, "cannot alloc nullbuf\n");
2543                 ret = -ENOMEM;
2544                 goto err3;
2545         }
2546
2547         udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2548         if (udc_controller->nullp == DMA_ADDR_INVALID) {
2549                 udc_controller->nullp = dma_map_single(
2550                                         udc_controller->gadget.dev.parent,
2551                                         udc_controller->nullbuf,
2552                                         256,
2553                                         DMA_TO_DEVICE);
2554                 udc_controller->nullmap = 1;
2555         } else {
2556                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2557                                         udc_controller->nullp, 256,
2558                                         DMA_TO_DEVICE);
2559         }
2560
2561         tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2562                         (unsigned long)udc_controller);
2563         /* request irq and disable DR  */
2564         udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2565
2566         ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2567                                 driver_name, udc_controller);
2568         if (ret) {
2569                 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2570                         udc_controller->usb_irq, ret);
2571                 goto err4;
2572         }
2573
2574         ret = device_add(&udc_controller->gadget.dev);
2575         if (ret)
2576                 goto err5;
2577
2578         dev_info(udc_controller->dev,
2579                         "QE/CPM USB controller initialized as device\n");
2580         return 0;
2581
2582 err5:
2583         free_irq(udc_controller->usb_irq, udc_controller);
2584 err4:
2585         if (udc_controller->nullmap) {
2586                 dma_unmap_single(udc_controller->gadget.dev.parent,
2587                         udc_controller->nullp, 256,
2588                                 DMA_TO_DEVICE);
2589                         udc_controller->nullp = DMA_ADDR_INVALID;
2590         } else {
2591                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2592                         udc_controller->nullp, 256,
2593                                 DMA_TO_DEVICE);
2594         }
2595         kfree(udc_controller->nullbuf);
2596 err3:
2597         ep = &udc_controller->eps[0];
2598         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2599         kfree(ep->rxframe);
2600         kfree(ep->rxbuffer);
2601         kfree(ep->txframe);
2602 err2:
2603         iounmap(udc_controller->usb_regs);
2604 err1:
2605         kfree(udc_controller);
2606
2607         return ret;
2608 }
2609
2610 #ifdef CONFIG_PM
2611 static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
2612 {
2613         return -ENOTSUPP;
2614 }
2615
2616 static int qe_udc_resume(struct of_device *dev)
2617 {
2618         return -ENOTSUPP;
2619 }
2620 #endif
2621
2622 static int __devexit qe_udc_remove(struct of_device *ofdev)
2623 {
2624         struct qe_ep *ep;
2625         unsigned int size;
2626
2627         DECLARE_COMPLETION(done);
2628
2629         if (!udc_controller)
2630                 return -ENODEV;
2631
2632         udc_controller->done = &done;
2633         tasklet_disable(&udc_controller->rx_tasklet);
2634
2635         if (udc_controller->nullmap) {
2636                 dma_unmap_single(udc_controller->gadget.dev.parent,
2637                         udc_controller->nullp, 256,
2638                                 DMA_TO_DEVICE);
2639                         udc_controller->nullp = DMA_ADDR_INVALID;
2640         } else {
2641                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2642                         udc_controller->nullp, 256,
2643                                 DMA_TO_DEVICE);
2644         }
2645         kfree(udc_controller->nullbuf);
2646
2647         ep = &udc_controller->eps[0];
2648         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2649         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2650
2651         kfree(ep->rxframe);
2652         if (ep->rxbufmap) {
2653                 dma_unmap_single(udc_controller->gadget.dev.parent,
2654                                 ep->rxbuf_d, size,
2655                                 DMA_FROM_DEVICE);
2656                 ep->rxbuf_d = DMA_ADDR_INVALID;
2657         } else {
2658                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2659                                 ep->rxbuf_d, size,
2660                                 DMA_FROM_DEVICE);
2661         }
2662
2663         kfree(ep->rxbuffer);
2664         kfree(ep->txframe);
2665
2666         free_irq(udc_controller->usb_irq, udc_controller);
2667
2668         tasklet_kill(&udc_controller->rx_tasklet);
2669
2670         iounmap(udc_controller->usb_regs);
2671
2672         device_unregister(&udc_controller->gadget.dev);
2673         /* wait for release() of gadget.dev to free udc */
2674         wait_for_completion(&done);
2675
2676         return 0;
2677 }
2678
2679 /*-------------------------------------------------------------------------*/
2680 static struct of_device_id __devinitdata qe_udc_match[] = {
2681         {
2682                 .compatible = "fsl,mpc8360-qe-usb",
2683                 .data = (void *)PORT_QE,
2684         },
2685         {
2686                 .compatible = "fsl,mpc8272-cpm-usb",
2687                 .data = (void *)PORT_CPM,
2688         },
2689         {},
2690 };
2691
2692 MODULE_DEVICE_TABLE(of, qe_udc_match);
2693
2694 static struct of_platform_driver udc_driver = {
2695         .name           = (char *)driver_name,
2696         .match_table    = qe_udc_match,
2697         .probe          = qe_udc_probe,
2698         .remove         = __devexit_p(qe_udc_remove),
2699 #ifdef CONFIG_PM
2700         .suspend        = qe_udc_suspend,
2701         .resume         = qe_udc_resume,
2702 #endif
2703 };
2704
2705 static int __init qe_udc_init(void)
2706 {
2707         printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2708                         DRIVER_VERSION);
2709         return of_register_platform_driver(&udc_driver);
2710 }
2711
2712 static void __exit qe_udc_exit(void)
2713 {
2714         of_unregister_platform_driver(&udc_driver);
2715 }
2716
2717 module_init(qe_udc_init);
2718 module_exit(qe_udc_exit);
2719
2720 MODULE_DESCRIPTION(DRIVER_DESC);
2721 MODULE_AUTHOR(DRIVER_AUTHOR);
2722 MODULE_LICENSE("GPL");
2723