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 a 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         udc = ep->udc;
1801         /* Attempt to halt IN ep will fail if any transfer requests
1802          * are still queue */
1803         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1804                 status = -EAGAIN;
1805                 goto out;
1806         }
1807
1808         status = 0;
1809         spin_lock_irqsave(&ep->udc->lock, flags);
1810         qe_eptx_stall_change(ep, value);
1811         qe_eprx_stall_change(ep, value);
1812         spin_unlock_irqrestore(&ep->udc->lock, flags);
1813
1814         if (ep->epnum == 0) {
1815                 udc->ep0_state = WAIT_FOR_SETUP;
1816                 udc->ep0_dir = 0;
1817         }
1818 out:
1819         dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1820                         value ?  "set" : "clear", status);
1821
1822         return status;
1823 }
1824
1825 static struct usb_ep_ops qe_ep_ops = {
1826         .enable = qe_ep_enable,
1827         .disable = qe_ep_disable,
1828
1829         .alloc_request = qe_alloc_request,
1830         .free_request = qe_free_request,
1831
1832         .queue = qe_ep_queue,
1833         .dequeue = qe_ep_dequeue,
1834
1835         .set_halt = qe_ep_set_halt,
1836 };
1837
1838 /*------------------------------------------------------------------------
1839         Gadget Driver Layer Operations
1840  ------------------------------------------------------------------------*/
1841
1842 /* Get the current frame number */
1843 static int qe_get_frame(struct usb_gadget *gadget)
1844 {
1845         u16 tmp;
1846
1847         tmp = in_be16(&udc_controller->usb_param->frame_n);
1848         if (tmp & 0x8000)
1849                 tmp = tmp & 0x07ff;
1850         else
1851                 tmp = -EINVAL;
1852
1853         return (int)tmp;
1854 }
1855
1856 /* Tries to wake up the host connected to this gadget
1857  *
1858  * Return : 0-success
1859  * Negative-this feature not enabled by host or not supported by device hw
1860  */
1861 static int qe_wakeup(struct usb_gadget *gadget)
1862 {
1863         return -ENOTSUPP;
1864 }
1865
1866 /* Notify controller that VBUS is powered, Called by whatever
1867    detects VBUS sessions */
1868 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1869 {
1870         return -ENOTSUPP;
1871 }
1872
1873 /* constrain controller's VBUS power usage
1874  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1875  * reporting how much power the device may consume.  For example, this
1876  * could affect how quickly batteries are recharged.
1877  *
1878  * Returns zero on success, else negative errno.
1879  */
1880 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1881 {
1882         return -ENOTSUPP;
1883 }
1884
1885 /* Change Data+ pullup status
1886  * this func is used by usb_gadget_connect/disconnect
1887  */
1888 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1889 {
1890         return -ENOTSUPP;
1891 }
1892
1893 /* defined in usb_gadget.h */
1894 static struct usb_gadget_ops qe_gadget_ops = {
1895         .get_frame = qe_get_frame,
1896         .wakeup = qe_wakeup,
1897 /*      .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1898         .vbus_session = qe_vbus_session,
1899         .vbus_draw = qe_vbus_draw,
1900         .pullup = qe_pullup,
1901 };
1902
1903 /*-------------------------------------------------------------------------
1904         USB ep0 Setup process in BUS Enumeration
1905  -------------------------------------------------------------------------*/
1906 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1907 {
1908         struct qe_ep *ep = &udc->eps[pipe];
1909
1910         nuke(ep, -ECONNRESET);
1911         ep->tx_req = NULL;
1912         return 0;
1913 }
1914
1915 static int reset_queues(struct qe_udc *udc)
1916 {
1917         u8 pipe;
1918
1919         for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1920                 udc_reset_ep_queue(udc, pipe);
1921
1922         /* report disconnect; the driver is already quiesced */
1923         spin_unlock(&udc->lock);
1924         udc->driver->disconnect(&udc->gadget);
1925         spin_lock(&udc->lock);
1926
1927         return 0;
1928 }
1929
1930 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1931                         u16 length)
1932 {
1933         /* Save the new address to device struct */
1934         udc->device_address = (u8) value;
1935         /* Update usb state */
1936         udc->usb_state = USB_STATE_ADDRESS;
1937
1938         /* Status phase , send a ZLP */
1939         if (ep0_prime_status(udc, USB_DIR_IN))
1940                 qe_ep0_stall(udc);
1941 }
1942
1943 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1944 {
1945         struct qe_req *req = container_of(_req, struct qe_req, req);
1946
1947         req->req.buf = NULL;
1948         kfree(req);
1949 }
1950
1951 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1952                         u16 index, u16 length)
1953 {
1954         u16 usb_status = 0;
1955         struct qe_req *req;
1956         struct qe_ep *ep;
1957         int status = 0;
1958
1959         ep = &udc->eps[0];
1960         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1961                 /* Get device status */
1962                 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1963         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1964                 /* Get interface status */
1965                 /* We don't have interface information in udc driver */
1966                 usb_status = 0;
1967         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1968                 /* Get endpoint status */
1969                 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1970                 struct qe_ep *target_ep = &udc->eps[pipe];
1971                 u16 usep;
1972
1973                 /* stall if endpoint doesn't exist */
1974                 if (!target_ep->desc)
1975                         goto stall;
1976
1977                 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1978                 if (index & USB_DIR_IN) {
1979                         if (target_ep->dir != USB_DIR_IN)
1980                                 goto stall;
1981                         if ((usep & USB_THS_MASK) == USB_THS_STALL)
1982                                 usb_status = 1 << USB_ENDPOINT_HALT;
1983                 } else {
1984                         if (target_ep->dir != USB_DIR_OUT)
1985                                 goto stall;
1986                         if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
1987                                 usb_status = 1 << USB_ENDPOINT_HALT;
1988                 }
1989         }
1990
1991         req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
1992                                         struct qe_req, req);
1993         req->req.length = 2;
1994         req->req.buf = udc->statusbuf;
1995         *(u16 *)req->req.buf = cpu_to_le16(usb_status);
1996         req->req.status = -EINPROGRESS;
1997         req->req.actual = 0;
1998         req->req.complete = ownercomplete;
1999
2000         udc->ep0_dir = USB_DIR_IN;
2001
2002         /* data phase */
2003         status = qe_ep_queue(&ep->ep, &req->req, GFP_ATOMIC);
2004
2005         if (status == 0)
2006                 return;
2007 stall:
2008         dev_err(udc->dev, "Can't respond to getstatus request \n");
2009         qe_ep0_stall(udc);
2010 }
2011
2012 /* only handle the setup request, suppose the device in normal status */
2013 static void setup_received_handle(struct qe_udc *udc,
2014                                 struct usb_ctrlrequest *setup)
2015 {
2016         /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2017         u16 wValue = le16_to_cpu(setup->wValue);
2018         u16 wIndex = le16_to_cpu(setup->wIndex);
2019         u16 wLength = le16_to_cpu(setup->wLength);
2020
2021         /* clear the previous request in the ep0 */
2022         udc_reset_ep_queue(udc, 0);
2023
2024         if (setup->bRequestType & USB_DIR_IN)
2025                 udc->ep0_dir = USB_DIR_IN;
2026         else
2027                 udc->ep0_dir = USB_DIR_OUT;
2028
2029         switch (setup->bRequest) {
2030         case USB_REQ_GET_STATUS:
2031                 /* Data+Status phase form udc */
2032                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2033                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
2034                         break;
2035                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2036                                         wLength);
2037                 return;
2038
2039         case USB_REQ_SET_ADDRESS:
2040                 /* Status phase from udc */
2041                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2042                                                 USB_RECIP_DEVICE))
2043                         break;
2044                 ch9setaddress(udc, wValue, wIndex, wLength);
2045                 return;
2046
2047         case USB_REQ_CLEAR_FEATURE:
2048         case USB_REQ_SET_FEATURE:
2049                 /* Requests with no data phase, status phase from udc */
2050                 if ((setup->bRequestType & USB_TYPE_MASK)
2051                                         != USB_TYPE_STANDARD)
2052                         break;
2053
2054                 if ((setup->bRequestType & USB_RECIP_MASK)
2055                                 == USB_RECIP_ENDPOINT) {
2056                         int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2057                         struct qe_ep *ep;
2058
2059                         if (wValue != 0 || wLength != 0
2060                                 || pipe > USB_MAX_ENDPOINTS)
2061                                 break;
2062                         ep = &udc->eps[pipe];
2063
2064                         spin_unlock(&udc->lock);
2065                         qe_ep_set_halt(&ep->ep,
2066                                         (setup->bRequest == USB_REQ_SET_FEATURE)
2067                                                 ? 1 : 0);
2068                         spin_lock(&udc->lock);
2069                 }
2070
2071                 ep0_prime_status(udc, USB_DIR_IN);
2072
2073                 return;
2074
2075         default:
2076                 break;
2077         }
2078
2079         if (wLength) {
2080                 /* Data phase from gadget, status phase from udc */
2081                 if (setup->bRequestType & USB_DIR_IN) {
2082                         udc->ep0_state = DATA_STATE_XMIT;
2083                         udc->ep0_dir = USB_DIR_IN;
2084                 } else {
2085                         udc->ep0_state = DATA_STATE_RECV;
2086                         udc->ep0_dir = USB_DIR_OUT;
2087                 }
2088                 spin_unlock(&udc->lock);
2089                 if (udc->driver->setup(&udc->gadget,
2090                                         &udc->local_setup_buff) < 0)
2091                         qe_ep0_stall(udc);
2092                 spin_lock(&udc->lock);
2093         } else {
2094                 /* No data phase, IN status from gadget */
2095                 udc->ep0_dir = USB_DIR_IN;
2096                 spin_unlock(&udc->lock);
2097                 if (udc->driver->setup(&udc->gadget,
2098                                         &udc->local_setup_buff) < 0)
2099                         qe_ep0_stall(udc);
2100                 spin_lock(&udc->lock);
2101                 udc->ep0_state = DATA_STATE_NEED_ZLP;
2102         }
2103 }
2104
2105 /*-------------------------------------------------------------------------
2106         USB Interrupt handlers
2107  -------------------------------------------------------------------------*/
2108 static void suspend_irq(struct qe_udc *udc)
2109 {
2110         udc->resume_state = udc->usb_state;
2111         udc->usb_state = USB_STATE_SUSPENDED;
2112
2113         /* report suspend to the driver ,serial.c not support this*/
2114         if (udc->driver->suspend)
2115                 udc->driver->suspend(&udc->gadget);
2116 }
2117
2118 static void resume_irq(struct qe_udc *udc)
2119 {
2120         udc->usb_state = udc->resume_state;
2121         udc->resume_state = 0;
2122
2123         /* report resume to the driver , serial.c not support this*/
2124         if (udc->driver->resume)
2125                 udc->driver->resume(&udc->gadget);
2126 }
2127
2128 static void idle_irq(struct qe_udc *udc)
2129 {
2130         u8 usbs;
2131
2132         usbs = in_8(&udc->usb_regs->usb_usbs);
2133         if (usbs & USB_IDLE_STATUS_MASK) {
2134                 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2135                         suspend_irq(udc);
2136         } else {
2137                 if (udc->usb_state == USB_STATE_SUSPENDED)
2138                         resume_irq(udc);
2139         }
2140 }
2141
2142 static int reset_irq(struct qe_udc *udc)
2143 {
2144         unsigned char i;
2145
2146         qe_usb_disable();
2147         out_8(&udc->usb_regs->usb_usadr, 0);
2148
2149         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2150                 if (udc->eps[i].init)
2151                         qe_ep_reset(udc, i);
2152         }
2153
2154         reset_queues(udc);
2155         udc->usb_state = USB_STATE_DEFAULT;
2156         udc->ep0_state = WAIT_FOR_SETUP;
2157         udc->ep0_dir = USB_DIR_OUT;
2158         qe_usb_enable();
2159         return 0;
2160 }
2161
2162 static int bsy_irq(struct qe_udc *udc)
2163 {
2164         return 0;
2165 }
2166
2167 static int txe_irq(struct qe_udc *udc)
2168 {
2169         return 0;
2170 }
2171
2172 /* ep0 tx interrupt also in here */
2173 static int tx_irq(struct qe_udc *udc)
2174 {
2175         struct qe_ep *ep;
2176         struct qe_bd __iomem *bd;
2177         int i, res = 0;
2178
2179         if ((udc->usb_state == USB_STATE_ADDRESS)
2180                 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2181                 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2182
2183         for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2184                 ep = &udc->eps[i];
2185                 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2186                         bd = ep->c_txbd;
2187                         if (!(in_be32((u32 __iomem *)bd) & T_R)
2188                                                 && (in_be32(&bd->buf))) {
2189                                 /* confirm the transmitted bd */
2190                                 if (ep->epnum == 0)
2191                                         res = qe_ep0_txconf(ep);
2192                                 else
2193                                         res = qe_ep_txconf(ep);
2194                         }
2195                 }
2196         }
2197         return res;
2198 }
2199
2200
2201 /* setup packect's rx is handle in the function too */
2202 static void rx_irq(struct qe_udc *udc)
2203 {
2204         struct qe_ep *ep;
2205         struct qe_bd __iomem *bd;
2206         int i;
2207
2208         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2209                 ep = &udc->eps[i];
2210                 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2211                         bd = ep->n_rxbd;
2212                         if (!(in_be32((u32 __iomem *)bd) & R_E)
2213                                                 && (in_be32(&bd->buf))) {
2214                                 if (ep->epnum == 0) {
2215                                         qe_ep0_rx(udc);
2216                                 } else {
2217                                         /*non-setup package receive*/
2218                                         qe_ep_rx(ep);
2219                                 }
2220                         }
2221                 }
2222         }
2223 }
2224
2225 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2226 {
2227         struct qe_udc *udc = (struct qe_udc *)_udc;
2228         u16 irq_src;
2229         irqreturn_t status = IRQ_NONE;
2230         unsigned long flags;
2231
2232         spin_lock_irqsave(&udc->lock, flags);
2233
2234         irq_src = in_be16(&udc->usb_regs->usb_usber) &
2235                 in_be16(&udc->usb_regs->usb_usbmr);
2236         /* Clear notification bits */
2237         out_be16(&udc->usb_regs->usb_usber, irq_src);
2238         /* USB Interrupt */
2239         if (irq_src & USB_E_IDLE_MASK) {
2240                 idle_irq(udc);
2241                 irq_src &= ~USB_E_IDLE_MASK;
2242                 status = IRQ_HANDLED;
2243         }
2244
2245         if (irq_src & USB_E_TXB_MASK) {
2246                 tx_irq(udc);
2247                 irq_src &= ~USB_E_TXB_MASK;
2248                 status = IRQ_HANDLED;
2249         }
2250
2251         if (irq_src & USB_E_RXB_MASK) {
2252                 rx_irq(udc);
2253                 irq_src &= ~USB_E_RXB_MASK;
2254                 status = IRQ_HANDLED;
2255         }
2256
2257         if (irq_src & USB_E_RESET_MASK) {
2258                 reset_irq(udc);
2259                 irq_src &= ~USB_E_RESET_MASK;
2260                 status = IRQ_HANDLED;
2261         }
2262
2263         if (irq_src & USB_E_BSY_MASK) {
2264                 bsy_irq(udc);
2265                 irq_src &= ~USB_E_BSY_MASK;
2266                 status = IRQ_HANDLED;
2267         }
2268
2269         if (irq_src & USB_E_TXE_MASK) {
2270                 txe_irq(udc);
2271                 irq_src &= ~USB_E_TXE_MASK;
2272                 status = IRQ_HANDLED;
2273         }
2274
2275         spin_unlock_irqrestore(&udc->lock, flags);
2276
2277         return status;
2278 }
2279
2280 /*-------------------------------------------------------------------------
2281         Gadget driver register and unregister.
2282  --------------------------------------------------------------------------*/
2283 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2284 {
2285         int retval;
2286         unsigned long flags = 0;
2287
2288         /* standard operations */
2289         if (!udc_controller)
2290                 return -ENODEV;
2291
2292         if (!driver || (driver->speed != USB_SPEED_FULL
2293                         && driver->speed != USB_SPEED_HIGH)
2294                         || !driver->bind || !driver->disconnect
2295                         || !driver->setup)
2296                 return -EINVAL;
2297
2298         if (udc_controller->driver)
2299                 return -EBUSY;
2300
2301         /* lock is needed but whether should use this lock or another */
2302         spin_lock_irqsave(&udc_controller->lock, flags);
2303
2304         driver->driver.bus = NULL;
2305         /* hook up the driver */
2306         udc_controller->driver = driver;
2307         udc_controller->gadget.dev.driver = &driver->driver;
2308         udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2309         spin_unlock_irqrestore(&udc_controller->lock, flags);
2310
2311         retval = driver->bind(&udc_controller->gadget);
2312         if (retval) {
2313                 dev_err(udc_controller->dev, "bind to %s --> %d",
2314                                 driver->driver.name, retval);
2315                 udc_controller->gadget.dev.driver = NULL;
2316                 udc_controller->driver = NULL;
2317                 return retval;
2318         }
2319
2320         /* Enable IRQ reg and Set usbcmd reg EN bit */
2321         qe_usb_enable();
2322
2323         out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2324         out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2325         udc_controller->usb_state = USB_STATE_ATTACHED;
2326         udc_controller->ep0_state = WAIT_FOR_SETUP;
2327         udc_controller->ep0_dir = USB_DIR_OUT;
2328         dev_info(udc_controller->dev, "%s bind to driver %s \n",
2329                 udc_controller->gadget.name, driver->driver.name);
2330         return 0;
2331 }
2332 EXPORT_SYMBOL(usb_gadget_register_driver);
2333
2334 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2335 {
2336         struct qe_ep *loop_ep;
2337         unsigned long flags;
2338
2339         if (!udc_controller)
2340                 return -ENODEV;
2341
2342         if (!driver || driver != udc_controller->driver)
2343                 return -EINVAL;
2344
2345         /* stop usb controller, disable intr */
2346         qe_usb_disable();
2347
2348         /* in fact, no needed */
2349         udc_controller->usb_state = USB_STATE_ATTACHED;
2350         udc_controller->ep0_state = WAIT_FOR_SETUP;
2351         udc_controller->ep0_dir = 0;
2352
2353         /* stand operation */
2354         spin_lock_irqsave(&udc_controller->lock, flags);
2355         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2356         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2357         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2358                                 ep.ep_list)
2359                 nuke(loop_ep, -ESHUTDOWN);
2360         spin_unlock_irqrestore(&udc_controller->lock, flags);
2361
2362         /* unbind gadget and unhook driver. */
2363         driver->unbind(&udc_controller->gadget);
2364         udc_controller->gadget.dev.driver = NULL;
2365         udc_controller->driver = NULL;
2366
2367         dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2368                         driver->driver.name);
2369         return 0;
2370 }
2371 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2372
2373 /* udc structure's alloc and setup, include ep-param alloc */
2374 static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
2375 {
2376         struct qe_udc *udc;
2377         struct device_node *np = ofdev->node;
2378         unsigned int tmp_addr = 0;
2379         struct usb_device_para __iomem *usbpram;
2380         unsigned int i;
2381         u64 size;
2382         u32 offset;
2383
2384         udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2385         if (udc == NULL) {
2386                 dev_err(&ofdev->dev, "malloc udc failed\n");
2387                 goto cleanup;
2388         }
2389
2390         udc->dev = &ofdev->dev;
2391
2392         /* get default address of usb parameter in MURAM from device tree */
2393         offset = *of_get_address(np, 1, &size, NULL);
2394         udc->usb_param = cpm_muram_addr(offset);
2395         memset_io(udc->usb_param, 0, size);
2396
2397         usbpram = udc->usb_param;
2398         out_be16(&usbpram->frame_n, 0);
2399         out_be32(&usbpram->rstate, 0);
2400
2401         tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2402                                         sizeof(struct usb_ep_para)),
2403                                            USB_EP_PARA_ALIGNMENT);
2404
2405         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2406                 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2407                 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2408                 tmp_addr += 32;
2409         }
2410
2411         memset_io(udc->ep_param[0], 0,
2412                         USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2413
2414         udc->resume_state = USB_STATE_NOTATTACHED;
2415         udc->usb_state = USB_STATE_POWERED;
2416         udc->ep0_dir = 0;
2417
2418         spin_lock_init(&udc->lock);
2419         return udc;
2420
2421 cleanup:
2422         kfree(udc);
2423         return NULL;
2424 }
2425
2426 /* USB Controller register init */
2427 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2428 {
2429         struct usb_ctlr __iomem *qe_usbregs;
2430         qe_usbregs = udc->usb_regs;
2431
2432         /* Init the usb register */
2433         out_8(&qe_usbregs->usb_usmod, 0x01);
2434         out_be16(&qe_usbregs->usb_usbmr, 0);
2435         out_8(&qe_usbregs->usb_uscom, 0);
2436         out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2437
2438         return 0;
2439 }
2440
2441 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2442 {
2443         struct qe_ep *ep = &udc->eps[pipe_num];
2444
2445         ep->udc = udc;
2446         strcpy(ep->name, ep_name[pipe_num]);
2447         ep->ep.name = ep_name[pipe_num];
2448
2449         ep->ep.ops = &qe_ep_ops;
2450         ep->stopped = 1;
2451         ep->ep.maxpacket = (unsigned short) ~0;
2452         ep->desc = NULL;
2453         ep->dir = 0xff;
2454         ep->epnum = (u8)pipe_num;
2455         ep->sent = 0;
2456         ep->last = 0;
2457         ep->init = 0;
2458         ep->rxframe = NULL;
2459         ep->txframe = NULL;
2460         ep->tx_req = NULL;
2461         ep->state = EP_STATE_IDLE;
2462         ep->has_data = 0;
2463
2464         /* the queue lists any req for this ep */
2465         INIT_LIST_HEAD(&ep->queue);
2466
2467         /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2468         if (pipe_num != 0)
2469                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2470
2471         ep->gadget = &udc->gadget;
2472
2473         return 0;
2474 }
2475
2476 /*-----------------------------------------------------------------------
2477  *      UDC device Driver operation functions                           *
2478  *----------------------------------------------------------------------*/
2479 static void qe_udc_release(struct device *dev)
2480 {
2481         int i = 0;
2482
2483         complete(udc_controller->done);
2484         cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2485         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2486                 udc_controller->ep_param[i] = NULL;
2487
2488         kfree(udc_controller);
2489         udc_controller = NULL;
2490 }
2491
2492 /* Driver probe functions */
2493 static int __devinit qe_udc_probe(struct of_device *ofdev,
2494                         const struct of_device_id *match)
2495 {
2496         struct device_node *np = ofdev->node;
2497         struct qe_ep *ep;
2498         unsigned int ret = 0;
2499         unsigned int i;
2500         const void *prop;
2501
2502         prop = of_get_property(np, "mode", NULL);
2503         if (!prop || strcmp(prop, "peripheral"))
2504                 return -ENODEV;
2505
2506         /* Initialize the udc structure including QH member and other member */
2507         udc_controller = qe_udc_config(ofdev);
2508         if (!udc_controller) {
2509                 dev_dbg(&ofdev->dev, "udc_controll is NULL\n");
2510                 return -ENOMEM;
2511         }
2512
2513         udc_controller->soc_type = (unsigned long)match->data;
2514         udc_controller->usb_regs = of_iomap(np, 0);
2515         if (!udc_controller->usb_regs) {
2516                 ret = -ENOMEM;
2517                 goto err1;
2518         }
2519
2520         /* initialize usb hw reg except for regs for EP,
2521          * leave usbintr reg untouched*/
2522         qe_udc_reg_init(udc_controller);
2523
2524         /* here comes the stand operations for probe
2525          * set the qe_udc->gadget.xxx */
2526         udc_controller->gadget.ops = &qe_gadget_ops;
2527
2528         /* gadget.ep0 is a pointer */
2529         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2530
2531         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2532
2533         /* modify in register gadget process */
2534         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2535
2536         /* name: Identifies the controller hardware type. */
2537         udc_controller->gadget.name = driver_name;
2538
2539         device_initialize(&udc_controller->gadget.dev);
2540
2541         strcpy(udc_controller->gadget.dev.bus_id, "gadget");
2542
2543         udc_controller->gadget.dev.release = qe_udc_release;
2544         udc_controller->gadget.dev.parent = &ofdev->dev;
2545
2546         /* initialize qe_ep struct */
2547         for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2548                 /* because the ep type isn't decide here so
2549                  * qe_ep_init() should be called in ep_enable() */
2550
2551                 /* setup the qe_ep struct and link ep.ep.list
2552                  * into gadget.ep_list */
2553                 qe_ep_config(udc_controller, (unsigned char)i);
2554         }
2555
2556         /* ep0 initialization in here */
2557         ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2558         if (ret)
2559                 goto err2;
2560
2561         /* create a buf for ZLP send, need to remain zeroed */
2562         udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2563         if (udc_controller->nullbuf == NULL) {
2564                 dev_dbg(udc_controller->dev, "cannot alloc nullbuf\n");
2565                 ret = -ENOMEM;
2566                 goto err3;
2567         }
2568
2569         /* buffer for data of get_status request */
2570         udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2571         if (udc_controller->statusbuf == NULL) {
2572                 ret = -ENOMEM;
2573                 goto err4;
2574         }
2575
2576         udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2577         if (udc_controller->nullp == DMA_ADDR_INVALID) {
2578                 udc_controller->nullp = dma_map_single(
2579                                         udc_controller->gadget.dev.parent,
2580                                         udc_controller->nullbuf,
2581                                         256,
2582                                         DMA_TO_DEVICE);
2583                 udc_controller->nullmap = 1;
2584         } else {
2585                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2586                                         udc_controller->nullp, 256,
2587                                         DMA_TO_DEVICE);
2588         }
2589
2590         tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2591                         (unsigned long)udc_controller);
2592         /* request irq and disable DR  */
2593         udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2594
2595         ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2596                                 driver_name, udc_controller);
2597         if (ret) {
2598                 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2599                         udc_controller->usb_irq, ret);
2600                 goto err5;
2601         }
2602
2603         ret = device_add(&udc_controller->gadget.dev);
2604         if (ret)
2605                 goto err6;
2606
2607         dev_info(udc_controller->dev,
2608                         "%s USB controller initialized as device\n",
2609                         (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2610         return 0;
2611
2612 err6:
2613         free_irq(udc_controller->usb_irq, udc_controller);
2614 err5:
2615         if (udc_controller->nullmap) {
2616                 dma_unmap_single(udc_controller->gadget.dev.parent,
2617                         udc_controller->nullp, 256,
2618                                 DMA_TO_DEVICE);
2619                         udc_controller->nullp = DMA_ADDR_INVALID;
2620         } else {
2621                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2622                         udc_controller->nullp, 256,
2623                                 DMA_TO_DEVICE);
2624         }
2625         kfree(udc_controller->statusbuf);
2626 err4:
2627         kfree(udc_controller->nullbuf);
2628 err3:
2629         ep = &udc_controller->eps[0];
2630         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2631         kfree(ep->rxframe);
2632         kfree(ep->rxbuffer);
2633         kfree(ep->txframe);
2634 err2:
2635         iounmap(udc_controller->usb_regs);
2636 err1:
2637         kfree(udc_controller);
2638
2639         return ret;
2640 }
2641
2642 #ifdef CONFIG_PM
2643 static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
2644 {
2645         return -ENOTSUPP;
2646 }
2647
2648 static int qe_udc_resume(struct of_device *dev)
2649 {
2650         return -ENOTSUPP;
2651 }
2652 #endif
2653
2654 static int __devexit qe_udc_remove(struct of_device *ofdev)
2655 {
2656         struct qe_ep *ep;
2657         unsigned int size;
2658
2659         DECLARE_COMPLETION(done);
2660
2661         if (!udc_controller)
2662                 return -ENODEV;
2663
2664         udc_controller->done = &done;
2665         tasklet_disable(&udc_controller->rx_tasklet);
2666
2667         if (udc_controller->nullmap) {
2668                 dma_unmap_single(udc_controller->gadget.dev.parent,
2669                         udc_controller->nullp, 256,
2670                                 DMA_TO_DEVICE);
2671                         udc_controller->nullp = DMA_ADDR_INVALID;
2672         } else {
2673                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2674                         udc_controller->nullp, 256,
2675                                 DMA_TO_DEVICE);
2676         }
2677         kfree(udc_controller->statusbuf);
2678         kfree(udc_controller->nullbuf);
2679
2680         ep = &udc_controller->eps[0];
2681         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2682         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2683
2684         kfree(ep->rxframe);
2685         if (ep->rxbufmap) {
2686                 dma_unmap_single(udc_controller->gadget.dev.parent,
2687                                 ep->rxbuf_d, size,
2688                                 DMA_FROM_DEVICE);
2689                 ep->rxbuf_d = DMA_ADDR_INVALID;
2690         } else {
2691                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2692                                 ep->rxbuf_d, size,
2693                                 DMA_FROM_DEVICE);
2694         }
2695
2696         kfree(ep->rxbuffer);
2697         kfree(ep->txframe);
2698
2699         free_irq(udc_controller->usb_irq, udc_controller);
2700
2701         tasklet_kill(&udc_controller->rx_tasklet);
2702
2703         iounmap(udc_controller->usb_regs);
2704
2705         device_unregister(&udc_controller->gadget.dev);
2706         /* wait for release() of gadget.dev to free udc */
2707         wait_for_completion(&done);
2708
2709         return 0;
2710 }
2711
2712 /*-------------------------------------------------------------------------*/
2713 static struct of_device_id __devinitdata qe_udc_match[] = {
2714         {
2715                 .compatible = "fsl,mpc8360-qe-usb",
2716                 .data = (void *)PORT_QE,
2717         },
2718         {
2719                 .compatible = "fsl,mpc8272-cpm-usb",
2720                 .data = (void *)PORT_CPM,
2721         },
2722         {},
2723 };
2724
2725 MODULE_DEVICE_TABLE(of, qe_udc_match);
2726
2727 static struct of_platform_driver udc_driver = {
2728         .name           = (char *)driver_name,
2729         .match_table    = qe_udc_match,
2730         .probe          = qe_udc_probe,
2731         .remove         = __devexit_p(qe_udc_remove),
2732 #ifdef CONFIG_PM
2733         .suspend        = qe_udc_suspend,
2734         .resume         = qe_udc_resume,
2735 #endif
2736 };
2737
2738 static int __init qe_udc_init(void)
2739 {
2740         printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2741                         DRIVER_VERSION);
2742         return of_register_platform_driver(&udc_driver);
2743 }
2744
2745 static void __exit qe_udc_exit(void)
2746 {
2747         of_unregister_platform_driver(&udc_driver);
2748 }
2749
2750 module_init(qe_udc_init);
2751 module_exit(qe_udc_exit);
2752
2753 MODULE_DESCRIPTION(DRIVER_DESC);
2754 MODULE_AUTHOR(DRIVER_AUTHOR);
2755 MODULE_LICENSE("GPL");
2756