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/err.h>
  30 #include <linux/slab.h>
  31 #include <linux/list.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/io.h>
  34 #include <linux/moduleparam.h>
  35 #include <linux/of_address.h>
  36 #include <linux/of_platform.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/usb/ch9.h>
  39 #include <linux/usb/gadget.h>
  40 #include <linux/usb/otg.h>
  41 #include <asm/qe.h>
  42 #include <asm/cpm.h>
  43 #include <asm/dma.h>
  44 #include <asm/reg.h>
  45 #include "fsl_qe_udc.h"
  46
  47 #define DRIVER_DESC     "Freescale QE/CPM USB Device Controller driver"
  48 #define DRIVER_AUTHOR   "Xie XiaoBo"
  49 #define DRIVER_VERSION  "1.0"
  50
  51 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  52
  53 static const char driver_name[] = "fsl_qe_udc";
  54 static const char driver_desc[] = DRIVER_DESC;
  55
  56 /*ep name is important in gadget, it should obey the convention of ep_match()*/
  57 static const char *const ep_name[] = {
  58         "ep0-control", /* everyone has ep0 */
  59         /* 3 configurable endpoints */
  60         "ep1",
  61         "ep2",
  62         "ep3",
  63 };
  64
  65 static struct usb_endpoint_descriptor qe_ep0_desc = {
  66         .bLength =              USB_DT_ENDPOINT_SIZE,
  67         .bDescriptorType =      USB_DT_ENDPOINT,
  68
  69         .bEndpointAddress =     0,
  70         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
  71         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
  72 };
  73
  74 /* it is initialized in probe()  */
  75 static struct qe_udc *udc_controller;
  76
  77 /********************************************************************
  78  *      Internal Used Function Start
  79 ********************************************************************/
  80 /*-----------------------------------------------------------------
  81  * done() - retire a request; caller blocked irqs
  82  *--------------------------------------------------------------*/
  83 static void done(struct qe_ep *ep, struct qe_req *req, int status)
  84 {
  85         struct qe_udc *udc = ep->udc;
  86         unsigned char stopped = ep->stopped;
  87
  88         /* the req->queue pointer is used by ep_queue() func, in which
  89          * the request will be added into a udc_ep->queue 'd tail
  90          * so here the req will be dropped from the ep->queue
  91          */
  92         list_del_init(&req->queue);
  93
  94         /* req.status should be set as -EINPROGRESS in ep_queue() */
  95         if (req->req.status == -EINPROGRESS)
  96                 req->req.status = status;
  97         else
  98                 status = req->req.status;
  99
 100         if (req->mapped) {
 101                 dma_unmap_single(udc->gadget.dev.parent,
 102                         req->req.dma, req->req.length,
 103                         ep_is_in(ep)
 104                                 ? DMA_TO_DEVICE
 105                                 : DMA_FROM_DEVICE);
 106                 req->req.dma = DMA_ADDR_INVALID;
 107                 req->mapped = 0;
 108         } else
 109                 dma_sync_single_for_cpu(udc->gadget.dev.parent,
 110                         req->req.dma, req->req.length,
 111                         ep_is_in(ep)
 112                                 ? DMA_TO_DEVICE
 113                                 : DMA_FROM_DEVICE);
 114
 115         if (status && (status != -ESHUTDOWN))
 116                 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
 117                         ep->ep.name, &req->req, status,
 118                         req->req.actual, req->req.length);
 119
 120         /* don't modify queue heads during completion callback */
 121         ep->stopped = 1;
 122         spin_unlock(&udc->lock);
 123
 124         /* this complete() should a func implemented by gadget layer,
 125          * eg fsg->bulk_in_complete() */
 126         if (req->req.complete)
 127                 req->req.complete(&ep->ep, &req->req);
 128
 129         spin_lock(&udc->lock);
 130
 131         ep->stopped = stopped;
 132 }
 133
 134 /*-----------------------------------------------------------------
 135  * nuke(): delete all requests related to this ep
 136  *--------------------------------------------------------------*/
 137 static void nuke(struct qe_ep *ep, int status)
 138 {
 139         /* Whether this eq has request linked */
 140         while (!list_empty(&ep->queue)) {
 141                 struct qe_req *req = NULL;
 142                 req = list_entry(ep->queue.next, struct qe_req, queue);
 143
 144                 done(ep, req, status);
 145         }
 146 }
 147
 148 /*---------------------------------------------------------------------------*
 149  * USB and Endpoint manipulate process, include parameter and register       *
 150  *---------------------------------------------------------------------------*/
 151 /* @value: 1--set stall 0--clean stall */
 152 static int qe_eprx_stall_change(struct qe_ep *ep, int value)
 153 {
 154         u16 tem_usep;
 155         u8 epnum = ep->epnum;
 156         struct qe_udc *udc = ep->udc;
 157
 158         tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
 159         tem_usep = tem_usep & ~USB_RHS_MASK;
 160         if (value == 1)
 161                 tem_usep |= USB_RHS_STALL;
 162         else if (ep->dir == USB_DIR_IN)
 163                 tem_usep |= USB_RHS_IGNORE_OUT;
 164
 165         out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
 166         return 0;
 167 }
 168
 169 static int qe_eptx_stall_change(struct qe_ep *ep, int value)
 170 {
 171         u16 tem_usep;
 172         u8 epnum = ep->epnum;
 173         struct qe_udc *udc = ep->udc;
 174
 175         tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
 176         tem_usep = tem_usep & ~USB_THS_MASK;
 177         if (value == 1)
 178                 tem_usep |= USB_THS_STALL;
 179         else if (ep->dir == USB_DIR_OUT)
 180                 tem_usep |= USB_THS_IGNORE_IN;
 181
 182         out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
 183
 184         return 0;
 185 }
 186
 187 static int qe_ep0_stall(struct qe_udc *udc)
 188 {
 189         qe_eptx_stall_change(&udc->eps[0], 1);
 190         qe_eprx_stall_change(&udc->eps[0], 1);
 191         udc_controller->ep0_state = WAIT_FOR_SETUP;
 192         udc_controller->ep0_dir = 0;
 193         return 0;
 194 }
 195
 196 static int qe_eprx_nack(struct qe_ep *ep)
 197 {
 198         u8 epnum = ep->epnum;
 199         struct qe_udc *udc = ep->udc;
 200
 201         if (ep->state == EP_STATE_IDLE) {
 202                 /* Set the ep's nack */
 203                 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
 204                                 USB_RHS_MASK, USB_RHS_NACK);
 205
 206                 /* Mask Rx and Busy interrupts */
 207                 clrbits16(&udc->usb_regs->usb_usbmr,
 208                                 (USB_E_RXB_MASK | USB_E_BSY_MASK));
 209
 210                 ep->state = EP_STATE_NACK;
 211         }
 212         return 0;
 213 }
 214
 215 static int qe_eprx_normal(struct qe_ep *ep)
 216 {
 217         struct qe_udc *udc = ep->udc;
 218
 219         if (ep->state == EP_STATE_NACK) {
 220                 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
 221                                 USB_RTHS_MASK, USB_THS_IGNORE_IN);
 222
 223                 /* Unmask RX interrupts */
 224                 out_be16(&udc->usb_regs->usb_usber,
 225                                 USB_E_BSY_MASK | USB_E_RXB_MASK);
 226                 setbits16(&udc->usb_regs->usb_usbmr,
 227                                 (USB_E_RXB_MASK | USB_E_BSY_MASK));
 228
 229                 ep->state = EP_STATE_IDLE;
 230                 ep->has_data = 0;
 231         }
 232
 233         return 0;
 234 }
 235
 236 static int qe_ep_cmd_stoptx(struct qe_ep *ep)
 237 {
 238         if (ep->udc->soc_type == PORT_CPM)
 239                 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
 240                                 CPM_USB_STOP_TX_OPCODE);
 241         else
 242                 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
 243                                 ep->epnum, 0);
 244
 245         return 0;
 246 }
 247
 248 static int qe_ep_cmd_restarttx(struct qe_ep *ep)
 249 {
 250         if (ep->udc->soc_type == PORT_CPM)
 251                 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
 252                                 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
 253         else
 254                 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
 255                                 ep->epnum, 0);
 256
 257         return 0;
 258 }
 259
 260 static int qe_ep_flushtxfifo(struct qe_ep *ep)
 261 {
 262         struct qe_udc *udc = ep->udc;
 263         int i;
 264
 265         i = (int)ep->epnum;
 266
 267         qe_ep_cmd_stoptx(ep);
 268         out_8(&udc->usb_regs->usb_uscom,
 269                 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
 270         out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
 271         out_be32(&udc->ep_param[i]->tstate, 0);
 272         out_be16(&udc->ep_param[i]->tbcnt, 0);
 273
 274         ep->c_txbd = ep->txbase;
 275         ep->n_txbd = ep->txbase;
 276         qe_ep_cmd_restarttx(ep);
 277         return 0;
 278 }
 279
 280 static int qe_ep_filltxfifo(struct qe_ep *ep)
 281 {
 282         struct qe_udc *udc = ep->udc;
 283
 284         out_8(&udc->usb_regs->usb_uscom,
 285                         USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
 286         return 0;
 287 }
 288
 289 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
 290 {
 291         struct qe_ep *ep;
 292         u32 bdring_len;
 293         struct qe_bd __iomem *bd;
 294         int i;
 295
 296         ep = &udc->eps[pipe_num];
 297
 298         if (ep->dir == USB_DIR_OUT)
 299                 bdring_len = USB_BDRING_LEN_RX;
 300         else
 301                 bdring_len = USB_BDRING_LEN;
 302
 303         bd = ep->rxbase;
 304         for (i = 0; i < (bdring_len - 1); i++) {
 305                 out_be32((u32 __iomem *)bd, R_E | R_I);
 306                 bd++;
 307         }
 308         out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
 309
 310         bd = ep->txbase;
 311         for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
 312                 out_be32(&bd->buf, 0);
 313                 out_be32((u32 __iomem *)bd, 0);
 314                 bd++;
 315         }
 316         out_be32((u32 __iomem *)bd, T_W);
 317
 318         return 0;
 319 }
 320
 321 static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
 322 {
 323         struct qe_ep *ep;
 324         u16 tmpusep;
 325
 326         ep = &udc->eps[pipe_num];
 327         tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
 328         tmpusep &= ~USB_RTHS_MASK;
 329
 330         switch (ep->dir) {
 331         case USB_DIR_BOTH:
 332                 qe_ep_flushtxfifo(ep);
 333                 break;
 334         case USB_DIR_OUT:
 335                 tmpusep |= USB_THS_IGNORE_IN;
 336                 break;
 337         case USB_DIR_IN:
 338                 qe_ep_flushtxfifo(ep);
 339                 tmpusep |= USB_RHS_IGNORE_OUT;
 340                 break;
 341         default:
 342                 break;
 343         }
 344         out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
 345
 346         qe_epbds_reset(udc, pipe_num);
 347
 348         return 0;
 349 }
 350
 351 static int qe_ep_toggledata01(struct qe_ep *ep)
 352 {
 353         ep->data01 ^= 0x1;
 354         return 0;
 355 }
 356
 357 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
 358 {
 359         struct qe_ep *ep = &udc->eps[pipe_num];
 360         unsigned long tmp_addr = 0;
 361         struct usb_ep_para __iomem *epparam;
 362         int i;
 363         struct qe_bd __iomem *bd;
 364         int bdring_len;
 365
 366         if (ep->dir == USB_DIR_OUT)
 367                 bdring_len = USB_BDRING_LEN_RX;
 368         else
 369                 bdring_len = USB_BDRING_LEN;
 370
 371         epparam = udc->ep_param[pipe_num];
 372         /* alloc multi-ram for BD rings and set the ep parameters */
 373         tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
 374                                 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
 375         if (IS_ERR_VALUE(tmp_addr))
 376                 return -ENOMEM;
 377
 378         out_be16(&epparam->rbase, (u16)tmp_addr);
 379         out_be16(&epparam->tbase, (u16)(tmp_addr +
 380                                 (sizeof(struct qe_bd) * bdring_len)));
 381
 382         out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
 383         out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
 384
 385         ep->rxbase = cpm_muram_addr(tmp_addr);
 386         ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
 387                                 * bdring_len));
 388         ep->n_rxbd = ep->rxbase;
 389         ep->e_rxbd = ep->rxbase;
 390         ep->n_txbd = ep->txbase;
 391         ep->c_txbd = ep->txbase;
 392         ep->data01 = 0; /* data0 */
 393
 394         /* Init TX and RX bds */
 395         bd = ep->rxbase;
 396         for (i = 0; i < bdring_len - 1; i++) {
 397                 out_be32(&bd->buf, 0);
 398                 out_be32((u32 __iomem *)bd, 0);
 399                 bd++;
 400         }
 401         out_be32(&bd->buf, 0);
 402         out_be32((u32 __iomem *)bd, R_W);
 403
 404         bd = ep->txbase;
 405         for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
 406                 out_be32(&bd->buf, 0);
 407                 out_be32((u32 __iomem *)bd, 0);
 408                 bd++;
 409         }
 410         out_be32(&bd->buf, 0);
 411         out_be32((u32 __iomem *)bd, T_W);
 412
 413         return 0;
 414 }
 415
 416 static int qe_ep_rxbd_update(struct qe_ep *ep)
 417 {
 418         unsigned int size;
 419         int i;
 420         unsigned int tmp;
 421         struct qe_bd __iomem *bd;
 422         unsigned int bdring_len;
 423
 424         if (ep->rxbase == NULL)
 425                 return -EINVAL;
 426
 427         bd = ep->rxbase;
 428
 429         ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
 430         if (ep->rxframe == NULL) {
 431                 dev_err(ep->udc->dev, "malloc rxframe failed\n");
 432                 return -ENOMEM;
 433         }
 434
 435         qe_frame_init(ep->rxframe);
 436
 437         if (ep->dir == USB_DIR_OUT)
 438                 bdring_len = USB_BDRING_LEN_RX;
 439         else
 440                 bdring_len = USB_BDRING_LEN;
 441
 442         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
 443         ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
 444         if (ep->rxbuffer == NULL) {
 445                 dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
 446                                 size);
 447                 kfree(ep->rxframe);
 448                 return -ENOMEM;
 449         }
 450
 451         ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
 452         if (ep->rxbuf_d == DMA_ADDR_INVALID) {
 453                 ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
 454                                         ep->rxbuffer,
 455                                         size,
 456                                         DMA_FROM_DEVICE);
 457                 ep->rxbufmap = 1;
 458         } else {
 459                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
 460                                         ep->rxbuf_d, size,
 461                                         DMA_FROM_DEVICE);
 462                 ep->rxbufmap = 0;
 463         }
 464
 465         size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
 466         tmp = ep->rxbuf_d;
 467         tmp = (u32)(((tmp >> 2) << 2) + 4);
 468
 469         for (i = 0; i < bdring_len - 1; i++) {
 470                 out_be32(&bd->buf, tmp);
 471                 out_be32((u32 __iomem *)bd, (R_E | R_I));
 472                 tmp = tmp + size;
 473                 bd++;
 474         }
 475         out_be32(&bd->buf, tmp);
 476         out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
 477
 478         return 0;
 479 }
 480
 481 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
 482 {
 483         struct qe_ep *ep = &udc->eps[pipe_num];
 484         struct usb_ep_para __iomem *epparam;
 485         u16 usep, logepnum;
 486         u16 tmp;
 487         u8 rtfcr = 0;
 488
 489         epparam = udc->ep_param[pipe_num];
 490
 491         usep = 0;
 492         logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 493         usep |= (logepnum << USB_EPNUM_SHIFT);
 494
 495         switch (ep->desc->bmAttributes & 0x03) {
 496         case USB_ENDPOINT_XFER_BULK:
 497                 usep |= USB_TRANS_BULK;
 498                 break;
 499         case USB_ENDPOINT_XFER_ISOC:
 500                 usep |=  USB_TRANS_ISO;
 501                 break;
 502         case USB_ENDPOINT_XFER_INT:
 503                 usep |= USB_TRANS_INT;
 504                 break;
 505         default:
 506                 usep |= USB_TRANS_CTR;
 507                 break;
 508         }
 509
 510         switch (ep->dir) {
 511         case USB_DIR_OUT:
 512                 usep |= USB_THS_IGNORE_IN;
 513                 break;
 514         case USB_DIR_IN:
 515                 usep |= USB_RHS_IGNORE_OUT;
 516                 break;
 517         default:
 518                 break;
 519         }
 520         out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
 521
 522         rtfcr = 0x30;
 523         out_8(&epparam->rbmr, rtfcr);
 524         out_8(&epparam->tbmr, rtfcr);
 525
 526         tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
 527         /* MRBLR must be divisble by 4 */
 528         tmp = (u16)(((tmp >> 2) << 2) + 4);
 529         out_be16(&epparam->mrblr, tmp);
 530
 531         return 0;
 532 }
 533
 534 static int qe_ep_init(struct qe_udc *udc,
 535                       unsigned char pipe_num,
 536                       const struct usb_endpoint_descriptor *desc)
 537 {
 538         struct qe_ep *ep = &udc->eps[pipe_num];
 539         unsigned long flags;
 540         int reval = 0;
 541         u16 max = 0;
 542
 543         max = usb_endpoint_maxp(desc);
 544
 545         /* check the max package size validate for this endpoint */
 546         /* Refer to USB2.0 spec table 9-13,
 547         */
 548         if (pipe_num != 0) {
 549                 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
 550                 case USB_ENDPOINT_XFER_BULK:
 551                         if (strstr(ep->ep.name, "-iso")
 552                                         || strstr(ep->ep.name, "-int"))
 553                                 goto en_done;
 554                         switch (udc->gadget.speed) {
 555                         case USB_SPEED_HIGH:
 556                         if ((max == 128) || (max == 256) || (max == 512))
 557                                 break;
 558                         default:
 559                                 switch (max) {
 560                                 case 4:
 561                                 case 8:
 562                                 case 16:
 563                                 case 32:
 564                                 case 64:
 565                                         break;
 566                                 default:
 567                                 case USB_SPEED_LOW:
 568                                         goto en_done;
 569                                 }
 570                         }
 571                         break;
 572                 case USB_ENDPOINT_XFER_INT:
 573                         if (strstr(ep->ep.name, "-iso"))        /* bulk is ok */
 574                                 goto en_done;
 575                         switch (udc->gadget.speed) {
 576                         case USB_SPEED_HIGH:
 577                                 if (max <= 1024)
 578                                         break;
 579                         case USB_SPEED_FULL:
 580                                 if (max <= 64)
 581                                         break;
 582                         default:
 583                                 if (max <= 8)
 584                                         break;
 585                                 goto en_done;
 586                         }
 587                         break;
 588                 case USB_ENDPOINT_XFER_ISOC:
 589                         if (strstr(ep->ep.name, "-bulk")
 590                                 || strstr(ep->ep.name, "-int"))
 591                                 goto en_done;
 592                         switch (udc->gadget.speed) {
 593                         case USB_SPEED_HIGH:
 594                                 if (max <= 1024)
 595                                         break;
 596                         case USB_SPEED_FULL:
 597                                 if (max <= 1023)
 598                                         break;
 599                         default:
 600                                 goto en_done;
 601                         }
 602                         break;
 603                 case USB_ENDPOINT_XFER_CONTROL:
 604                         if (strstr(ep->ep.name, "-iso")
 605                                 || strstr(ep->ep.name, "-int"))
 606                                 goto en_done;
 607                         switch (udc->gadget.speed) {
 608                         case USB_SPEED_HIGH:
 609                         case USB_SPEED_FULL:
 610                                 switch (max) {
 611                                 case 1:
 612                                 case 2:
 613                                 case 4:
 614                                 case 8:
 615                                 case 16:
 616                                 case 32:
 617                                 case 64:
 618                                         break;
 619                                 default:
 620                                         goto en_done;
 621                                 }
 622                         case USB_SPEED_LOW:
 623                                 switch (max) {
 624                                 case 1:
 625                                 case 2:
 626                                 case 4:
 627                                 case 8:
 628                                         break;
 629                                 default:
 630                                         goto en_done;
 631                                 }
 632                         default:
 633                                 goto en_done;
 634                         }
 635                         break;
 636
 637                 default:
 638                         goto en_done;
 639                 }
 640         } /* if ep0*/
 641
 642         spin_lock_irqsave(&udc->lock, flags);
 643
 644         /* initialize ep structure */
 645         ep->ep.maxpacket = max;
 646         ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
 647         ep->desc = desc;
 648         ep->stopped = 0;
 649         ep->init = 1;
 650
 651         if (pipe_num == 0) {
 652                 ep->dir = USB_DIR_BOTH;
 653                 udc->ep0_dir = USB_DIR_OUT;
 654                 udc->ep0_state = WAIT_FOR_SETUP;
 655         } else  {
 656                 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
 657                 case USB_DIR_OUT:
 658                         ep->dir = USB_DIR_OUT;
 659                         break;
 660                 case USB_DIR_IN:
 661                         ep->dir = USB_DIR_IN;
 662                 default:
 663                         break;
 664                 }
 665         }
 666
 667         /* hardware special operation */
 668         qe_ep_bd_init(udc, pipe_num);
 669         if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
 670                 reval = qe_ep_rxbd_update(ep);
 671                 if (reval)
 672                         goto en_done1;
 673         }
 674
 675         if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
 676                 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
 677                 if (ep->txframe == NULL) {
 678                         dev_err(udc->dev, "malloc txframe failed\n");
 679                         goto en_done2;
 680                 }
 681                 qe_frame_init(ep->txframe);
 682         }
 683
 684         qe_ep_register_init(udc, pipe_num);
 685
 686         /* Now HW will be NAKing transfers to that EP,
 687          * until a buffer is queued to it. */
 688         spin_unlock_irqrestore(&udc->lock, flags);
 689
 690         return 0;
 691 en_done2:
 692         kfree(ep->rxbuffer);
 693         kfree(ep->rxframe);
 694 en_done1:
 695         spin_unlock_irqrestore(&udc->lock, flags);
 696 en_done:
 697         dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
 698         return -ENODEV;
 699 }
 700
 701 static inline void qe_usb_enable(void)
 702 {
 703         setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
 704 }
 705
 706 static inline void qe_usb_disable(void)
 707 {
 708         clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
 709 }
 710
 711 /*----------------------------------------------------------------------------*
 712  *              USB and EP basic manipulate function end                      *
 713  *----------------------------------------------------------------------------*/
 714
 715
 716 /******************************************************************************
 717                 UDC transmit and receive process
 718  ******************************************************************************/
 719 static void recycle_one_rxbd(struct qe_ep *ep)
 720 {
 721         u32 bdstatus;
 722
 723         bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
 724         bdstatus = R_I | R_E | (bdstatus & R_W);
 725         out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
 726
 727         if (bdstatus & R_W)
 728                 ep->e_rxbd = ep->rxbase;
 729         else
 730                 ep->e_rxbd++;
 731 }
 732
 733 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
 734 {
 735         u32 bdstatus;
 736         struct qe_bd __iomem *bd, *nextbd;
 737         unsigned char stop = 0;
 738
 739         nextbd = ep->n_rxbd;
 740         bd = ep->e_rxbd;
 741         bdstatus = in_be32((u32 __iomem *)bd);
 742
 743         while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
 744                 bdstatus = R_E | R_I | (bdstatus & R_W);
 745                 out_be32((u32 __iomem *)bd, bdstatus);
 746
 747                 if (bdstatus & R_W)
 748                         bd = ep->rxbase;
 749                 else
 750                         bd++;
 751
 752                 bdstatus = in_be32((u32 __iomem *)bd);
 753                 if (stopatnext && (bd == nextbd))
 754                         stop = 1;
 755         }
 756
 757         ep->e_rxbd = bd;
 758 }
 759
 760 static void ep_recycle_rxbds(struct qe_ep *ep)
 761 {
 762         struct qe_bd __iomem *bd = ep->n_rxbd;
 763         u32 bdstatus;
 764         u8 epnum = ep->epnum;
 765         struct qe_udc *udc = ep->udc;
 766
 767         bdstatus = in_be32((u32 __iomem *)bd);
 768         if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
 769                 bd = ep->rxbase +
 770                                 ((in_be16(&udc->ep_param[epnum]->rbptr) -
 771                                   in_be16(&udc->ep_param[epnum]->rbase))
 772                                  >> 3);
 773                 bdstatus = in_be32((u32 __iomem *)bd);
 774
 775                 if (bdstatus & R_W)
 776                         bd = ep->rxbase;
 777                 else
 778                         bd++;
 779
 780                 ep->e_rxbd = bd;
 781                 recycle_rxbds(ep, 0);
 782                 ep->e_rxbd = ep->n_rxbd;
 783         } else
 784                 recycle_rxbds(ep, 1);
 785
 786         if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
 787                 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
 788
 789         if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
 790                 qe_eprx_normal(ep);
 791
 792         ep->localnack = 0;
 793 }
 794
 795 static void setup_received_handle(struct qe_udc *udc,
 796                                         struct usb_ctrlrequest *setup);
 797 static int qe_ep_rxframe_handle(struct qe_ep *ep);
 798 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
 799 /* when BD PID is setup, handle the packet */
 800 static int ep0_setup_handle(struct qe_udc *udc)
 801 {
 802         struct qe_ep *ep = &udc->eps[0];
 803         struct qe_frame *pframe;
 804         unsigned int fsize;
 805         u8 *cp;
 806
 807         pframe = ep->rxframe;
 808         if ((frame_get_info(pframe) & PID_SETUP)
 809                         && (udc->ep0_state == WAIT_FOR_SETUP)) {
 810                 fsize = frame_get_length(pframe);
 811                 if (unlikely(fsize != 8))
 812                         return -EINVAL;
 813                 cp = (u8 *)&udc->local_setup_buff;
 814                 memcpy(cp, pframe->data, fsize);
 815                 ep->data01 = 1;
 816
 817                 /* handle the usb command base on the usb_ctrlrequest */
 818                 setup_received_handle(udc, &udc->local_setup_buff);
 819                 return 0;
 820         }
 821         return -EINVAL;
 822 }
 823
 824 static int qe_ep0_rx(struct qe_udc *udc)
 825 {
 826         struct qe_ep *ep = &udc->eps[0];
 827         struct qe_frame *pframe;
 828         struct qe_bd __iomem *bd;
 829         u32 bdstatus, length;
 830         u32 vaddr;
 831
 832         pframe = ep->rxframe;
 833
 834         if (ep->dir == USB_DIR_IN) {
 835                 dev_err(udc->dev, "ep0 not a control endpoint\n");
 836                 return -EINVAL;
 837         }
 838
 839         bd = ep->n_rxbd;
 840         bdstatus = in_be32((u32 __iomem *)bd);
 841         length = bdstatus & BD_LENGTH_MASK;
 842
 843         while (!(bdstatus & R_E) && length) {
 844                 if ((bdstatus & R_F) && (bdstatus & R_L)
 845                         && !(bdstatus & R_ERROR)) {
 846                         if (length == USB_CRC_SIZE) {
 847                                 udc->ep0_state = WAIT_FOR_SETUP;
 848                                 dev_vdbg(udc->dev,
 849                                         "receive a ZLP in status phase\n");
 850                         } else {
 851                                 qe_frame_clean(pframe);
 852                                 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
 853                                 frame_set_data(pframe, (u8 *)vaddr);
 854                                 frame_set_length(pframe,
 855                                                 (length - USB_CRC_SIZE));
 856                                 frame_set_status(pframe, FRAME_OK);
 857                                 switch (bdstatus & R_PID) {
 858                                 case R_PID_SETUP:
 859                                         frame_set_info(pframe, PID_SETUP);
 860                                         break;
 861                                 case R_PID_DATA1:
 862                                         frame_set_info(pframe, PID_DATA1);
 863                                         break;
 864                                 default:
 865                                         frame_set_info(pframe, PID_DATA0);
 866                                         break;
 867                                 }
 868
 869                                 if ((bdstatus & R_PID) == R_PID_SETUP)
 870                                         ep0_setup_handle(udc);
 871                                 else
 872                                         qe_ep_rxframe_handle(ep);
 873                         }
 874                 } else {
 875                         dev_err(udc->dev, "The receive frame with error!\n");
 876                 }
 877
 878                 /* note: don't clear the rxbd's buffer address */
 879                 recycle_one_rxbd(ep);
 880
 881                 /* Get next BD */
 882                 if (bdstatus & R_W)
 883                         bd = ep->rxbase;
 884                 else
 885                         bd++;
 886
 887                 bdstatus = in_be32((u32 __iomem *)bd);
 888                 length = bdstatus & BD_LENGTH_MASK;
 889
 890         }
 891
 892         ep->n_rxbd = bd;
 893
 894         return 0;
 895 }
 896
 897 static int qe_ep_rxframe_handle(struct qe_ep *ep)
 898 {
 899         struct qe_frame *pframe;
 900         u8 framepid = 0;
 901         unsigned int fsize;
 902         u8 *cp;
 903         struct qe_req *req;
 904
 905         pframe = ep->rxframe;
 906
 907         if (frame_get_info(pframe) & PID_DATA1)
 908                 framepid = 0x1;
 909
 910         if (framepid != ep->data01) {
 911                 dev_err(ep->udc->dev, "the data01 error!\n");
 912                 return -EIO;
 913         }
 914
 915         fsize = frame_get_length(pframe);
 916         if (list_empty(&ep->queue)) {
 917                 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
 918         } else {
 919                 req = list_entry(ep->queue.next, struct qe_req, queue);
 920
 921                 cp = (u8 *)(req->req.buf) + req->req.actual;
 922                 if (cp) {
 923                         memcpy(cp, pframe->data, fsize);
 924                         req->req.actual += fsize;
 925                         if ((fsize < ep->ep.maxpacket) ||
 926                                         (req->req.actual >= req->req.length)) {
 927                                 if (ep->epnum == 0)
 928                                         ep0_req_complete(ep->udc, req);
 929                                 else
 930                                         done(ep, req, 0);
 931                                 if (list_empty(&ep->queue) && ep->epnum != 0)
 932                                         qe_eprx_nack(ep);
 933                         }
 934                 }
 935         }
 936
 937         qe_ep_toggledata01(ep);
 938
 939         return 0;
 940 }
 941
 942 static void ep_rx_tasklet(unsigned long data)
 943 {
 944         struct qe_udc *udc = (struct qe_udc *)data;
 945         struct qe_ep *ep;
 946         struct qe_frame *pframe;
 947         struct qe_bd __iomem *bd;
 948         unsigned long flags;
 949         u32 bdstatus, length;
 950         u32 vaddr, i;
 951
 952         spin_lock_irqsave(&udc->lock, flags);
 953
 954         for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
 955                 ep = &udc->eps[i];
 956
 957                 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
 958                         dev_dbg(udc->dev,
 959                                 "This is a transmit ep or disable tasklet!\n");
 960                         continue;
 961                 }
 962
 963                 pframe = ep->rxframe;
 964                 bd = ep->n_rxbd;
 965                 bdstatus = in_be32((u32 __iomem *)bd);
 966                 length = bdstatus & BD_LENGTH_MASK;
 967
 968                 while (!(bdstatus & R_E) && length) {
 969                         if (list_empty(&ep->queue)) {
 970                                 qe_eprx_nack(ep);
 971                                 dev_dbg(udc->dev,
 972                                         "The rxep have noreq %d\n",
 973                                         ep->has_data);
 974                                 break;
 975                         }
 976
 977                         if ((bdstatus & R_F) && (bdstatus & R_L)
 978                                 && !(bdstatus & R_ERROR)) {
 979                                 qe_frame_clean(pframe);
 980                                 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
 981                                 frame_set_data(pframe, (u8 *)vaddr);
 982                                 frame_set_length(pframe,
 983                                                 (length - USB_CRC_SIZE));
 984                                 frame_set_status(pframe, FRAME_OK);
 985                                 switch (bdstatus & R_PID) {
 986                                 case R_PID_DATA1:
 987                                         frame_set_info(pframe, PID_DATA1);
 988                                         break;
 989                                 case R_PID_SETUP:
 990                                         frame_set_info(pframe, PID_SETUP);
 991                                         break;
 992                                 default:
 993                                         frame_set_info(pframe, PID_DATA0);
 994                                         break;
 995                                 }
 996                                 /* handle the rx frame */
 997                                 qe_ep_rxframe_handle(ep);
 998                         } else {
 999                                 dev_err(udc->dev,
1000                                         "error in received frame\n");
1001                         }
1002                         /* note: don't clear the rxbd's buffer address */
1003                         /*clear the length */
1004                         out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
1005                         ep->has_data--;
1006                         if (!(ep->localnack))
1007                                 recycle_one_rxbd(ep);
1008
1009                         /* Get next BD */
1010                         if (bdstatus & R_W)
1011                                 bd = ep->rxbase;
1012                         else
1013                                 bd++;
1014
1015                         bdstatus = in_be32((u32 __iomem *)bd);
1016                         length = bdstatus & BD_LENGTH_MASK;
1017                 }
1018
1019                 ep->n_rxbd = bd;
1020
1021                 if (ep->localnack)
1022                         ep_recycle_rxbds(ep);
1023
1024                 ep->enable_tasklet = 0;
1025         } /* for i=1 */
1026
1027         spin_unlock_irqrestore(&udc->lock, flags);
1028 }
1029
1030 static int qe_ep_rx(struct qe_ep *ep)
1031 {
1032         struct qe_udc *udc;
1033         struct qe_frame *pframe;
1034         struct qe_bd __iomem *bd;
1035         u16 swoffs, ucoffs, emptybds;
1036
1037         udc = ep->udc;
1038         pframe = ep->rxframe;
1039
1040         if (ep->dir == USB_DIR_IN) {
1041                 dev_err(udc->dev, "transmit ep in rx function\n");
1042                 return -EINVAL;
1043         }
1044
1045         bd = ep->n_rxbd;
1046
1047         swoffs = (u16)(bd - ep->rxbase);
1048         ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1049                         in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1050         if (swoffs < ucoffs)
1051                 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1052         else
1053                 emptybds = swoffs - ucoffs;
1054
1055         if (emptybds < MIN_EMPTY_BDS) {
1056                 qe_eprx_nack(ep);
1057                 ep->localnack = 1;
1058                 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1059         }
1060         ep->has_data = USB_BDRING_LEN_RX - emptybds;
1061
1062         if (list_empty(&ep->queue)) {
1063                 qe_eprx_nack(ep);
1064                 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1065                                 ep->has_data);
1066                 return 0;
1067         }
1068
1069         tasklet_schedule(&udc->rx_tasklet);
1070         ep->enable_tasklet = 1;
1071
1072         return 0;
1073 }
1074
1075 /* send data from a frame, no matter what tx_req */
1076 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1077 {
1078         struct qe_udc *udc = ep->udc;
1079         struct qe_bd __iomem *bd;
1080         u16 saveusbmr;
1081         u32 bdstatus, pidmask;
1082         u32 paddr;
1083
1084         if (ep->dir == USB_DIR_OUT) {
1085                 dev_err(udc->dev, "receive ep passed to tx function\n");
1086                 return -EINVAL;
1087         }
1088
1089         /* Disable the Tx interrupt */
1090         saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1091         out_be16(&udc->usb_regs->usb_usbmr,
1092                         saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1093
1094         bd = ep->n_txbd;
1095         bdstatus = in_be32((u32 __iomem *)bd);
1096
1097         if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1098                 if (frame_get_length(frame) == 0) {
1099                         frame_set_data(frame, udc->nullbuf);
1100                         frame_set_length(frame, 2);
1101                         frame->info |= (ZLP | NO_CRC);
1102                         dev_vdbg(udc->dev, "the frame size = 0\n");
1103                 }
1104                 paddr = virt_to_phys((void *)frame->data);
1105                 out_be32(&bd->buf, paddr);
1106                 bdstatus = (bdstatus&T_W);
1107                 if (!(frame_get_info(frame) & NO_CRC))
1108                         bdstatus |= T_R | T_I | T_L | T_TC
1109                                         | frame_get_length(frame);
1110                 else
1111                         bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1112
1113                 /* if the packet is a ZLP in status phase */
1114                 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1115                         ep->data01 = 0x1;
1116
1117                 if (ep->data01) {
1118                         pidmask = T_PID_DATA1;
1119                         frame->info |= PID_DATA1;
1120                 } else {
1121                         pidmask = T_PID_DATA0;
1122                         frame->info |= PID_DATA0;
1123                 }
1124                 bdstatus |= T_CNF;
1125                 bdstatus |= pidmask;
1126                 out_be32((u32 __iomem *)bd, bdstatus);
1127                 qe_ep_filltxfifo(ep);
1128
1129                 /* enable the TX interrupt */
1130                 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1131
1132                 qe_ep_toggledata01(ep);
1133                 if (bdstatus & T_W)
1134                         ep->n_txbd = ep->txbase;
1135                 else
1136                         ep->n_txbd++;
1137
1138                 return 0;
1139         } else {
1140                 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1141                 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1142                 return -EBUSY;
1143         }
1144 }
1145
1146 /* when a bd was transmitted, the function can
1147  * handle the tx_req, not include ep0           */
1148 static int txcomplete(struct qe_ep *ep, unsigned char restart)
1149 {
1150         if (ep->tx_req != NULL) {
1151                 struct qe_req *req = ep->tx_req;
1152                 unsigned zlp = 0, last_len = 0;
1153
1154                 last_len = min_t(unsigned, req->req.length - ep->sent,
1155                                 ep->ep.maxpacket);
1156
1157                 if (!restart) {
1158                         int asent = ep->last;
1159                         ep->sent += asent;
1160                         ep->last -= asent;
1161                 } else {
1162                         ep->last = 0;
1163                 }
1164
1165                 /* zlp needed when req->re.zero is set */
1166                 if (req->req.zero) {
1167                         if (last_len == 0 ||
1168                                 (req->req.length % ep->ep.maxpacket) != 0)
1169                                 zlp = 0;
1170                         else
1171                                 zlp = 1;
1172                 } else
1173                         zlp = 0;
1174
1175                 /* a request already were transmitted completely */
1176                 if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) {
1177                         done(ep, ep->tx_req, 0);
1178                         ep->tx_req = NULL;
1179                         ep->last = 0;
1180                         ep->sent = 0;
1181                 }
1182         }
1183
1184         /* we should gain a new tx_req fot this endpoint */
1185         if (ep->tx_req == NULL) {
1186                 if (!list_empty(&ep->queue)) {
1187                         ep->tx_req = list_entry(ep->queue.next, struct qe_req,
1188                                                         queue);
1189                         ep->last = 0;
1190                         ep->sent = 0;
1191                 }
1192         }
1193
1194         return 0;
1195 }
1196
1197 /* give a frame and a tx_req, send some data */
1198 static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
1199 {
1200         unsigned int size;
1201         u8 *buf;
1202
1203         qe_frame_clean(frame);
1204         size = min_t(u32, (ep->tx_req->req.length - ep->sent),
1205                                 ep->ep.maxpacket);
1206         buf = (u8 *)ep->tx_req->req.buf + ep->sent;
1207         if (buf && size) {
1208                 ep->last = size;
1209                 ep->tx_req->req.actual += size;
1210                 frame_set_data(frame, buf);
1211                 frame_set_length(frame, size);
1212                 frame_set_status(frame, FRAME_OK);
1213                 frame_set_info(frame, 0);
1214                 return qe_ep_tx(ep, frame);
1215         }
1216         return -EIO;
1217 }
1218
1219 /* give a frame struct,send a ZLP */
1220 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1221 {
1222         struct qe_udc *udc = ep->udc;
1223
1224         if (frame == NULL)
1225                 return -ENODEV;
1226
1227         qe_frame_clean(frame);
1228         frame_set_data(frame, (u8 *)udc->nullbuf);
1229         frame_set_length(frame, 2);
1230         frame_set_status(frame, FRAME_OK);
1231         frame_set_info(frame, (ZLP | NO_CRC | infor));
1232
1233         return qe_ep_tx(ep, frame);
1234 }
1235
1236 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1237 {
1238         struct qe_req *req = ep->tx_req;
1239         int reval;
1240
1241         if (req == NULL)
1242                 return -ENODEV;
1243
1244         if ((req->req.length - ep->sent) > 0)
1245                 reval = qe_usb_senddata(ep, frame);
1246         else
1247                 reval = sendnulldata(ep, frame, 0);
1248
1249         return reval;
1250 }
1251
1252 /* if direction is DIR_IN, the status is Device->Host
1253  * if direction is DIR_OUT, the status transaction is Device<-Host
1254  * in status phase, udc create a request and gain status */
1255 static int ep0_prime_status(struct qe_udc *udc, int direction)
1256 {
1257
1258         struct qe_ep *ep = &udc->eps[0];
1259
1260         if (direction == USB_DIR_IN) {
1261                 udc->ep0_state = DATA_STATE_NEED_ZLP;
1262                 udc->ep0_dir = USB_DIR_IN;
1263                 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1264         } else {
1265                 udc->ep0_dir = USB_DIR_OUT;
1266                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1267         }
1268
1269         return 0;
1270 }
1271
1272 /* a request complete in ep0, whether gadget request or udc request */
1273 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1274 {
1275         struct qe_ep *ep = &udc->eps[0];
1276         /* because usb and ep's status already been set in ch9setaddress() */
1277
1278         switch (udc->ep0_state) {
1279         case DATA_STATE_XMIT:
1280                 done(ep, req, 0);
1281                 /* receive status phase */
1282                 if (ep0_prime_status(udc, USB_DIR_OUT))
1283                         qe_ep0_stall(udc);
1284                 break;
1285
1286         case DATA_STATE_NEED_ZLP:
1287                 done(ep, req, 0);
1288                 udc->ep0_state = WAIT_FOR_SETUP;
1289                 break;
1290
1291         case DATA_STATE_RECV:
1292                 done(ep, req, 0);
1293                 /* send status phase */
1294                 if (ep0_prime_status(udc, USB_DIR_IN))
1295                         qe_ep0_stall(udc);
1296                 break;
1297
1298         case WAIT_FOR_OUT_STATUS:
1299                 done(ep, req, 0);
1300                 udc->ep0_state = WAIT_FOR_SETUP;
1301                 break;
1302
1303         case WAIT_FOR_SETUP:
1304                 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1305                 break;
1306
1307         default:
1308                 qe_ep0_stall(udc);
1309                 break;
1310         }
1311 }
1312
1313 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1314 {
1315         struct qe_req *tx_req = NULL;
1316         struct qe_frame *frame = ep->txframe;
1317
1318         if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1319                 if (!restart)
1320                         ep->udc->ep0_state = WAIT_FOR_SETUP;
1321                 else
1322                         sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1323                 return 0;
1324         }
1325
1326         tx_req = ep->tx_req;
1327         if (tx_req != NULL) {
1328                 if (!restart) {
1329                         int asent = ep->last;
1330                         ep->sent += asent;
1331                         ep->last -= asent;
1332                 } else {
1333                         ep->last = 0;
1334                 }
1335
1336                 /* a request already were transmitted completely */
1337                 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1338                         ep->tx_req->req.actual = (unsigned int)ep->sent;
1339                         ep0_req_complete(ep->udc, ep->tx_req);
1340                         ep->tx_req = NULL;
1341                         ep->last = 0;
1342                         ep->sent = 0;
1343                 }
1344         } else {
1345                 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1346         }
1347
1348         return 0;
1349 }
1350
1351 static int ep0_txframe_handle(struct qe_ep *ep)
1352 {
1353         /* if have error, transmit again */
1354         if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1355                 qe_ep_flushtxfifo(ep);
1356                 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1357                 if (frame_get_info(ep->txframe) & PID_DATA0)
1358                         ep->data01 = 0;
1359                 else
1360                         ep->data01 = 1;
1361
1362                 ep0_txcomplete(ep, 1);
1363         } else
1364                 ep0_txcomplete(ep, 0);
1365
1366         frame_create_tx(ep, ep->txframe);
1367         return 0;
1368 }
1369
1370 static int qe_ep0_txconf(struct qe_ep *ep)
1371 {
1372         struct qe_bd __iomem *bd;
1373         struct qe_frame *pframe;
1374         u32 bdstatus;
1375
1376         bd = ep->c_txbd;
1377         bdstatus = in_be32((u32 __iomem *)bd);
1378         while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1379                 pframe = ep->txframe;
1380
1381                 /* clear and recycle the BD */
1382                 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1383                 out_be32(&bd->buf, 0);
1384                 if (bdstatus & T_W)
1385                         ep->c_txbd = ep->txbase;
1386                 else
1387                         ep->c_txbd++;
1388
1389                 if (ep->c_txbd == ep->n_txbd) {
1390                         if (bdstatus & DEVICE_T_ERROR) {
1391                                 frame_set_status(pframe, FRAME_ERROR);
1392                                 if (bdstatus & T_TO)
1393                                         pframe->status |= TX_ER_TIMEOUT;
1394                                 if (bdstatus & T_UN)
1395                                         pframe->status |= TX_ER_UNDERUN;
1396                         }
1397                         ep0_txframe_handle(ep);
1398                 }
1399
1400                 bd = ep->c_txbd;
1401                 bdstatus = in_be32((u32 __iomem *)bd);
1402         }
1403
1404         return 0;
1405 }
1406
1407 static int ep_txframe_handle(struct qe_ep *ep)
1408 {
1409         if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1410                 qe_ep_flushtxfifo(ep);
1411                 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1412                 if (frame_get_info(ep->txframe) & PID_DATA0)
1413                         ep->data01 = 0;
1414                 else
1415                         ep->data01 = 1;
1416
1417                 txcomplete(ep, 1);
1418         } else
1419                 txcomplete(ep, 0);
1420
1421         frame_create_tx(ep, ep->txframe); /* send the data */
1422         return 0;
1423 }
1424
1425 /* confirm the already trainsmited bd */
1426 static int qe_ep_txconf(struct qe_ep *ep)
1427 {
1428         struct qe_bd __iomem *bd;
1429         struct qe_frame *pframe = NULL;
1430         u32 bdstatus;
1431         unsigned char breakonrxinterrupt = 0;
1432
1433         bd = ep->c_txbd;
1434         bdstatus = in_be32((u32 __iomem *)bd);
1435         while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1436                 pframe = ep->txframe;
1437                 if (bdstatus & DEVICE_T_ERROR) {
1438                         frame_set_status(pframe, FRAME_ERROR);
1439                         if (bdstatus & T_TO)
1440                                 pframe->status |= TX_ER_TIMEOUT;
1441                         if (bdstatus & T_UN)
1442                                 pframe->status |= TX_ER_UNDERUN;
1443                 }
1444
1445                 /* clear and recycle the BD */
1446                 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1447                 out_be32(&bd->buf, 0);
1448                 if (bdstatus & T_W)
1449                         ep->c_txbd = ep->txbase;
1450                 else
1451                         ep->c_txbd++;
1452
1453                 /* handle the tx frame */
1454                 ep_txframe_handle(ep);
1455                 bd = ep->c_txbd;
1456                 bdstatus = in_be32((u32 __iomem *)bd);
1457         }
1458         if (breakonrxinterrupt)
1459                 return -EIO;
1460         else
1461                 return 0;
1462 }
1463
1464 /* Add a request in queue, and try to transmit a packet */
1465 static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1466 {
1467         int reval = 0;
1468
1469         if (ep->tx_req == NULL) {
1470                 ep->sent = 0;
1471                 ep->last = 0;
1472                 txcomplete(ep, 0); /* can gain a new tx_req */
1473                 reval = frame_create_tx(ep, ep->txframe);
1474         }
1475         return reval;
1476 }
1477
1478 /* Maybe this is a good ideal */
1479 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1480 {
1481         struct qe_udc *udc = ep->udc;
1482         struct qe_frame *pframe = NULL;
1483         struct qe_bd __iomem *bd;
1484         u32 bdstatus, length;
1485         u32 vaddr, fsize;
1486         u8 *cp;
1487         u8 finish_req = 0;
1488         u8 framepid;
1489
1490         if (list_empty(&ep->queue)) {
1491                 dev_vdbg(udc->dev, "the req already finish!\n");
1492                 return 0;
1493         }
1494         pframe = ep->rxframe;
1495
1496         bd = ep->n_rxbd;
1497         bdstatus = in_be32((u32 __iomem *)bd);
1498         length = bdstatus & BD_LENGTH_MASK;
1499
1500         while (!(bdstatus & R_E) && length) {
1501                 if (finish_req)
1502                         break;
1503                 if ((bdstatus & R_F) && (bdstatus & R_L)
1504                                         && !(bdstatus & R_ERROR)) {
1505                         qe_frame_clean(pframe);
1506                         vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1507                         frame_set_data(pframe, (u8 *)vaddr);
1508                         frame_set_length(pframe, (length - USB_CRC_SIZE));
1509                         frame_set_status(pframe, FRAME_OK);
1510                         switch (bdstatus & R_PID) {
1511                         case R_PID_DATA1:
1512                                 frame_set_info(pframe, PID_DATA1); break;
1513                         default:
1514                                 frame_set_info(pframe, PID_DATA0); break;
1515                         }
1516                         /* handle the rx frame */
1517
1518                         if (frame_get_info(pframe) & PID_DATA1)
1519                                 framepid = 0x1;
1520                         else
1521                                 framepid = 0;
1522
1523                         if (framepid != ep->data01) {
1524                                 dev_vdbg(udc->dev, "the data01 error!\n");
1525                         } else {
1526                                 fsize = frame_get_length(pframe);
1527
1528                                 cp = (u8 *)(req->req.buf) + req->req.actual;
1529                                 if (cp) {
1530                                         memcpy(cp, pframe->data, fsize);
1531                                         req->req.actual += fsize;
1532                                         if ((fsize < ep->ep.maxpacket)
1533                                                 || (req->req.actual >=
1534                                                         req->req.length)) {
1535                                                 finish_req = 1;
1536                                                 done(ep, req, 0);
1537                                                 if (list_empty(&ep->queue))
1538                                                         qe_eprx_nack(ep);
1539                                         }
1540                                 }
1541                                 qe_ep_toggledata01(ep);
1542                         }
1543                 } else {
1544                         dev_err(udc->dev, "The receive frame with error!\n");
1545                 }
1546
1547                 /* note: don't clear the rxbd's buffer address *
1548                  * only Clear the length */
1549                 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1550                 ep->has_data--;
1551
1552                 /* Get next BD */
1553                 if (bdstatus & R_W)
1554                         bd = ep->rxbase;
1555                 else
1556                         bd++;
1557
1558                 bdstatus = in_be32((u32 __iomem *)bd);
1559                 length = bdstatus & BD_LENGTH_MASK;
1560         }
1561
1562         ep->n_rxbd = bd;
1563         ep_recycle_rxbds(ep);
1564
1565         return 0;
1566 }
1567
1568 /* only add the request in queue */
1569 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1570 {
1571         if (ep->state == EP_STATE_NACK) {
1572                 if (ep->has_data <= 0) {
1573                         /* Enable rx and unmask rx interrupt */
1574                         qe_eprx_normal(ep);
1575                 } else {
1576                         /* Copy the exist BD data */
1577                         ep_req_rx(ep, req);
1578                 }
1579         }
1580
1581         return 0;
1582 }
1583
1584 /********************************************************************
1585         Internal Used Function End
1586 ********************************************************************/
1587
1588 /*-----------------------------------------------------------------------
1589         Endpoint Management Functions For Gadget
1590  -----------------------------------------------------------------------*/
1591 static int qe_ep_enable(struct usb_ep *_ep,
1592                          const struct usb_endpoint_descriptor *desc)
1593 {
1594         struct qe_udc *udc;
1595         struct qe_ep *ep;
1596         int retval = 0;
1597         unsigned char epnum;
1598
1599         ep = container_of(_ep, struct qe_ep, ep);
1600
1601         /* catch various bogus parameters */
1602         if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
1603                         (desc->bDescriptorType != USB_DT_ENDPOINT))
1604                 return -EINVAL;
1605
1606         udc = ep->udc;
1607         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1608                 return -ESHUTDOWN;
1609
1610         epnum = (u8)desc->bEndpointAddress & 0xF;
1611
1612         retval = qe_ep_init(udc, epnum, desc);
1613         if (retval != 0) {
1614                 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1615                 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1616                 return -EINVAL;
1617         }
1618         dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1619         return 0;
1620 }
1621
1622 static int qe_ep_disable(struct usb_ep *_ep)
1623 {
1624         struct qe_udc *udc;
1625         struct qe_ep *ep;
1626         unsigned long flags;
1627         unsigned int size;
1628
1629         ep = container_of(_ep, struct qe_ep, ep);
1630         udc = ep->udc;
1631
1632         if (!_ep || !ep->desc) {
1633                 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1634                 return -EINVAL;
1635         }
1636
1637         spin_lock_irqsave(&udc->lock, flags);
1638         /* Nuke all pending requests (does flush) */
1639         nuke(ep, -ESHUTDOWN);
1640         ep->desc = NULL;
1641         ep->stopped = 1;
1642         ep->tx_req = NULL;
1643         qe_ep_reset(udc, ep->epnum);
1644         spin_unlock_irqrestore(&udc->lock, flags);
1645
1646         cpm_muram_free(cpm_muram_offset(ep->rxbase));
1647
1648         if (ep->dir == USB_DIR_OUT)
1649                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1650                                 (USB_BDRING_LEN_RX + 1);
1651         else
1652                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1653                                 (USB_BDRING_LEN + 1);
1654
1655         if (ep->dir != USB_DIR_IN) {
1656                 kfree(ep->rxframe);
1657                 if (ep->rxbufmap) {
1658                         dma_unmap_single(udc_controller->gadget.dev.parent,
1659                                         ep->rxbuf_d, size,
1660                                         DMA_FROM_DEVICE);
1661                         ep->rxbuf_d = DMA_ADDR_INVALID;
1662                 } else {
1663                         dma_sync_single_for_cpu(
1664                                         udc_controller->gadget.dev.parent,
1665                                         ep->rxbuf_d, size,
1666                                         DMA_FROM_DEVICE);
1667                 }
1668                 kfree(ep->rxbuffer);
1669         }
1670
1671         if (ep->dir != USB_DIR_OUT)
1672                 kfree(ep->txframe);
1673
1674         dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1675         return 0;
1676 }
1677
1678 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1679 {
1680         struct qe_req *req;
1681
1682         req = kzalloc(sizeof(*req), gfp_flags);
1683         if (!req)
1684                 return NULL;
1685
1686         req->req.dma = DMA_ADDR_INVALID;
1687
1688         INIT_LIST_HEAD(&req->queue);
1689
1690         return &req->req;
1691 }
1692
1693 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1694 {
1695         struct qe_req *req;
1696
1697         req = container_of(_req, struct qe_req, req);
1698
1699         if (_req)
1700                 kfree(req);
1701 }
1702
1703 static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
1704 {
1705         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1706         struct qe_req *req = container_of(_req, struct qe_req, req);
1707         struct qe_udc *udc;
1708         int reval;
1709
1710         udc = ep->udc;
1711         /* catch various bogus parameters */
1712         if (!_req || !req->req.complete || !req->req.buf
1713                         || !list_empty(&req->queue)) {
1714                 dev_dbg(udc->dev, "bad params\n");
1715                 return -EINVAL;
1716         }
1717         if (!_ep || (!ep->desc && ep_index(ep))) {
1718                 dev_dbg(udc->dev, "bad ep\n");
1719                 return -EINVAL;
1720         }
1721
1722         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1723                 return -ESHUTDOWN;
1724
1725         req->ep = ep;
1726
1727         /* map virtual address to hardware */
1728         if (req->req.dma == DMA_ADDR_INVALID) {
1729                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1730                                         req->req.buf,
1731                                         req->req.length,
1732                                         ep_is_in(ep)
1733                                         ? DMA_TO_DEVICE :
1734                                         DMA_FROM_DEVICE);
1735                 req->mapped = 1;
1736         } else {
1737                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1738                                         req->req.dma, req->req.length,
1739                                         ep_is_in(ep)
1740                                         ? DMA_TO_DEVICE :
1741                                         DMA_FROM_DEVICE);
1742                 req->mapped = 0;
1743         }
1744
1745         req->req.status = -EINPROGRESS;
1746         req->req.actual = 0;
1747
1748         list_add_tail(&req->queue, &ep->queue);
1749         dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1750                         ep->name, req->req.length);
1751
1752         /* push the request to device */
1753         if (ep_is_in(ep))
1754                 reval = ep_req_send(ep, req);
1755
1756         /* EP0 */
1757         if (ep_index(ep) == 0 && req->req.length > 0) {
1758                 if (ep_is_in(ep))
1759                         udc->ep0_state = DATA_STATE_XMIT;
1760                 else
1761                         udc->ep0_state = DATA_STATE_RECV;
1762         }
1763
1764         if (ep->dir == USB_DIR_OUT)
1765                 reval = ep_req_receive(ep, req);
1766
1767         return 0;
1768 }
1769
1770 /* queues (submits) an I/O request to an endpoint */
1771 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1772                        gfp_t gfp_flags)
1773 {
1774         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1775         struct qe_udc *udc = ep->udc;
1776         unsigned long flags;
1777         int ret;
1778
1779         spin_lock_irqsave(&udc->lock, flags);
1780         ret = __qe_ep_queue(_ep, _req);
1781         spin_unlock_irqrestore(&udc->lock, flags);
1782         return ret;
1783 }
1784
1785 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1786 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1787 {
1788         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1789         struct qe_req *req;
1790         unsigned long flags;
1791
1792         if (!_ep || !_req)
1793                 return -EINVAL;
1794
1795         spin_lock_irqsave(&ep->udc->lock, flags);
1796
1797         /* make sure it's actually queued on this endpoint */
1798         list_for_each_entry(req, &ep->queue, queue) {
1799                 if (&req->req == _req)
1800                         break;
1801         }
1802
1803         if (&req->req != _req) {
1804                 spin_unlock_irqrestore(&ep->udc->lock, flags);
1805                 return -EINVAL;
1806         }
1807
1808         done(ep, req, -ECONNRESET);
1809
1810         spin_unlock_irqrestore(&ep->udc->lock, flags);
1811         return 0;
1812 }
1813
1814 /*-----------------------------------------------------------------
1815  * modify the endpoint halt feature
1816  * @ep: the non-isochronous endpoint being stalled
1817  * @value: 1--set halt  0--clear halt
1818  * Returns zero, or a negative error code.
1819 *----------------------------------------------------------------*/
1820 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1821 {
1822         struct qe_ep *ep;
1823         unsigned long flags;
1824         int status = -EOPNOTSUPP;
1825         struct qe_udc *udc;
1826
1827         ep = container_of(_ep, struct qe_ep, ep);
1828         if (!_ep || !ep->desc) {
1829                 status = -EINVAL;
1830                 goto out;
1831         }
1832
1833         udc = ep->udc;
1834         /* Attempt to halt IN ep will fail if any transfer requests
1835          * are still queue */
1836         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1837                 status = -EAGAIN;
1838                 goto out;
1839         }
1840
1841         status = 0;
1842         spin_lock_irqsave(&ep->udc->lock, flags);
1843         qe_eptx_stall_change(ep, value);
1844         qe_eprx_stall_change(ep, value);
1845         spin_unlock_irqrestore(&ep->udc->lock, flags);
1846
1847         if (ep->epnum == 0) {
1848                 udc->ep0_state = WAIT_FOR_SETUP;
1849                 udc->ep0_dir = 0;
1850         }
1851
1852         /* set data toggle to DATA0 on clear halt */
1853         if (value == 0)
1854                 ep->data01 = 0;
1855 out:
1856         dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1857                         value ?  "set" : "clear", status);
1858
1859         return status;
1860 }
1861
1862 static struct usb_ep_ops qe_ep_ops = {
1863         .enable = qe_ep_enable,
1864         .disable = qe_ep_disable,
1865
1866         .alloc_request = qe_alloc_request,
1867         .free_request = qe_free_request,
1868
1869         .queue = qe_ep_queue,
1870         .dequeue = qe_ep_dequeue,
1871
1872         .set_halt = qe_ep_set_halt,
1873 };
1874
1875 /*------------------------------------------------------------------------
1876         Gadget Driver Layer Operations
1877  ------------------------------------------------------------------------*/
1878
1879 /* Get the current frame number */
1880 static int qe_get_frame(struct usb_gadget *gadget)
1881 {
1882         u16 tmp;
1883
1884         tmp = in_be16(&udc_controller->usb_param->frame_n);
1885         if (tmp & 0x8000)
1886                 return tmp & 0x07ff;
1887         return -EINVAL;
1888 }
1889
1890 /* Tries to wake up the host connected to this gadget
1891  *
1892  * Return : 0-success
1893  * Negative-this feature not enabled by host or not supported by device hw
1894  */
1895 static int qe_wakeup(struct usb_gadget *gadget)
1896 {
1897         return -ENOTSUPP;
1898 }
1899
1900 /* Notify controller that VBUS is powered, Called by whatever
1901    detects VBUS sessions */
1902 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1903 {
1904         return -ENOTSUPP;
1905 }
1906
1907 /* constrain controller's VBUS power usage
1908  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1909  * reporting how much power the device may consume.  For example, this
1910  * could affect how quickly batteries are recharged.
1911  *
1912  * Returns zero on success, else negative errno.
1913  */
1914 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1915 {
1916         return -ENOTSUPP;
1917 }
1918
1919 /* Change Data+ pullup status
1920  * this func is used by usb_gadget_connect/disconnect
1921  */
1922 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1923 {
1924         return -ENOTSUPP;
1925 }
1926
1927 static int fsl_qe_start(struct usb_gadget_driver *driver,
1928                 int (*bind)(struct usb_gadget *));
1929 static int fsl_qe_stop(struct usb_gadget_driver *driver);
1930
1931 /* defined in usb_gadget.h */
1932 static struct usb_gadget_ops qe_gadget_ops = {
1933         .get_frame = qe_get_frame,
1934         .wakeup = qe_wakeup,
1935 /*      .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1936         .vbus_session = qe_vbus_session,
1937         .vbus_draw = qe_vbus_draw,
1938         .pullup = qe_pullup,
1939         .start = fsl_qe_start,
1940         .stop = fsl_qe_stop,
1941 };
1942
1943 /*-------------------------------------------------------------------------
1944         USB ep0 Setup process in BUS Enumeration
1945  -------------------------------------------------------------------------*/
1946 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1947 {
1948         struct qe_ep *ep = &udc->eps[pipe];
1949
1950         nuke(ep, -ECONNRESET);
1951         ep->tx_req = NULL;
1952         return 0;
1953 }
1954
1955 static int reset_queues(struct qe_udc *udc)
1956 {
1957         u8 pipe;
1958
1959         for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1960                 udc_reset_ep_queue(udc, pipe);
1961
1962         /* report disconnect; the driver is already quiesced */
1963         spin_unlock(&udc->lock);
1964         udc->driver->disconnect(&udc->gadget);
1965         spin_lock(&udc->lock);
1966
1967         return 0;
1968 }
1969
1970 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1971                         u16 length)
1972 {
1973         /* Save the new address to device struct */
1974         udc->device_address = (u8) value;
1975         /* Update usb state */
1976         udc->usb_state = USB_STATE_ADDRESS;
1977
1978         /* Status phase , send a ZLP */
1979         if (ep0_prime_status(udc, USB_DIR_IN))
1980                 qe_ep0_stall(udc);
1981 }
1982
1983 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1984 {
1985         struct qe_req *req = container_of(_req, struct qe_req, req);
1986
1987         req->req.buf = NULL;
1988         kfree(req);
1989 }
1990
1991 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1992                         u16 index, u16 length)
1993 {
1994         u16 usb_status = 0;
1995         struct qe_req *req;
1996         struct qe_ep *ep;
1997         int status = 0;
1998
1999         ep = &udc->eps[0];
2000         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
2001                 /* Get device status */
2002                 usb_status = 1 << USB_DEVICE_SELF_POWERED;
2003         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
2004                 /* Get interface status */
2005                 /* We don't have interface information in udc driver */
2006                 usb_status = 0;
2007         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
2008                 /* Get endpoint status */
2009                 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
2010                 struct qe_ep *target_ep = &udc->eps[pipe];
2011                 u16 usep;
2012
2013                 /* stall if endpoint doesn't exist */
2014                 if (!target_ep->desc)
2015                         goto stall;
2016
2017                 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
2018                 if (index & USB_DIR_IN) {
2019                         if (target_ep->dir != USB_DIR_IN)
2020                                 goto stall;
2021                         if ((usep & USB_THS_MASK) == USB_THS_STALL)
2022                                 usb_status = 1 << USB_ENDPOINT_HALT;
2023                 } else {
2024                         if (target_ep->dir != USB_DIR_OUT)
2025                                 goto stall;
2026                         if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
2027                                 usb_status = 1 << USB_ENDPOINT_HALT;
2028                 }
2029         }
2030
2031         req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
2032                                         struct qe_req, req);
2033         req->req.length = 2;
2034         req->req.buf = udc->statusbuf;
2035         *(u16 *)req->req.buf = cpu_to_le16(usb_status);
2036         req->req.status = -EINPROGRESS;
2037         req->req.actual = 0;
2038         req->req.complete = ownercomplete;
2039
2040         udc->ep0_dir = USB_DIR_IN;
2041
2042         /* data phase */
2043         status = __qe_ep_queue(&ep->ep, &req->req);
2044
2045         if (status == 0)
2046                 return;
2047 stall:
2048         dev_err(udc->dev, "Can't respond to getstatus request \n");
2049         qe_ep0_stall(udc);
2050 }
2051
2052 /* only handle the setup request, suppose the device in normal status */
2053 static void setup_received_handle(struct qe_udc *udc,
2054                                 struct usb_ctrlrequest *setup)
2055 {
2056         /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2057         u16 wValue = le16_to_cpu(setup->wValue);
2058         u16 wIndex = le16_to_cpu(setup->wIndex);
2059         u16 wLength = le16_to_cpu(setup->wLength);
2060
2061         /* clear the previous request in the ep0 */
2062         udc_reset_ep_queue(udc, 0);
2063
2064         if (setup->bRequestType & USB_DIR_IN)
2065                 udc->ep0_dir = USB_DIR_IN;
2066         else
2067                 udc->ep0_dir = USB_DIR_OUT;
2068
2069         switch (setup->bRequest) {
2070         case USB_REQ_GET_STATUS:
2071                 /* Data+Status phase form udc */
2072                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2073                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
2074                         break;
2075                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2076                                         wLength);
2077                 return;
2078
2079         case USB_REQ_SET_ADDRESS:
2080                 /* Status phase from udc */
2081                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2082                                                 USB_RECIP_DEVICE))
2083                         break;
2084                 ch9setaddress(udc, wValue, wIndex, wLength);
2085                 return;
2086
2087         case USB_REQ_CLEAR_FEATURE:
2088         case USB_REQ_SET_FEATURE:
2089                 /* Requests with no data phase, status phase from udc */
2090                 if ((setup->bRequestType & USB_TYPE_MASK)
2091                                         != USB_TYPE_STANDARD)
2092                         break;
2093
2094                 if ((setup->bRequestType & USB_RECIP_MASK)
2095                                 == USB_RECIP_ENDPOINT) {
2096                         int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2097                         struct qe_ep *ep;
2098
2099                         if (wValue != 0 || wLength != 0
2100                                 || pipe > USB_MAX_ENDPOINTS)
2101                                 break;
2102                         ep = &udc->eps[pipe];
2103
2104                         spin_unlock(&udc->lock);
2105                         qe_ep_set_halt(&ep->ep,
2106                                         (setup->bRequest == USB_REQ_SET_FEATURE)
2107                                                 ? 1 : 0);
2108                         spin_lock(&udc->lock);
2109                 }
2110
2111                 ep0_prime_status(udc, USB_DIR_IN);
2112
2113                 return;
2114
2115         default:
2116                 break;
2117         }
2118
2119         if (wLength) {
2120                 /* Data phase from gadget, status phase from udc */
2121                 if (setup->bRequestType & USB_DIR_IN) {
2122                         udc->ep0_state = DATA_STATE_XMIT;
2123                         udc->ep0_dir = USB_DIR_IN;
2124                 } else {
2125                         udc->ep0_state = DATA_STATE_RECV;
2126                         udc->ep0_dir = USB_DIR_OUT;
2127                 }
2128                 spin_unlock(&udc->lock);
2129                 if (udc->driver->setup(&udc->gadget,
2130                                         &udc->local_setup_buff) < 0)
2131                         qe_ep0_stall(udc);
2132                 spin_lock(&udc->lock);
2133         } else {
2134                 /* No data phase, IN status from gadget */
2135                 udc->ep0_dir = USB_DIR_IN;
2136                 spin_unlock(&udc->lock);
2137                 if (udc->driver->setup(&udc->gadget,
2138                                         &udc->local_setup_buff) < 0)
2139                         qe_ep0_stall(udc);
2140                 spin_lock(&udc->lock);
2141                 udc->ep0_state = DATA_STATE_NEED_ZLP;
2142         }
2143 }
2144
2145 /*-------------------------------------------------------------------------
2146         USB Interrupt handlers
2147  -------------------------------------------------------------------------*/
2148 static void suspend_irq(struct qe_udc *udc)
2149 {
2150         udc->resume_state = udc->usb_state;
2151         udc->usb_state = USB_STATE_SUSPENDED;
2152
2153         /* report suspend to the driver ,serial.c not support this*/
2154         if (udc->driver->suspend)
2155                 udc->driver->suspend(&udc->gadget);
2156 }
2157
2158 static void resume_irq(struct qe_udc *udc)
2159 {
2160         udc->usb_state = udc->resume_state;
2161         udc->resume_state = 0;
2162
2163         /* report resume to the driver , serial.c not support this*/
2164         if (udc->driver->resume)
2165                 udc->driver->resume(&udc->gadget);
2166 }
2167
2168 static void idle_irq(struct qe_udc *udc)
2169 {
2170         u8 usbs;
2171
2172         usbs = in_8(&udc->usb_regs->usb_usbs);
2173         if (usbs & USB_IDLE_STATUS_MASK) {
2174                 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2175                         suspend_irq(udc);
2176         } else {
2177                 if (udc->usb_state == USB_STATE_SUSPENDED)
2178                         resume_irq(udc);
2179         }
2180 }
2181
2182 static int reset_irq(struct qe_udc *udc)
2183 {
2184         unsigned char i;
2185
2186         if (udc->usb_state == USB_STATE_DEFAULT)
2187                 return 0;
2188
2189         qe_usb_disable();
2190         out_8(&udc->usb_regs->usb_usadr, 0);
2191
2192         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2193                 if (udc->eps[i].init)
2194                         qe_ep_reset(udc, i);
2195         }
2196
2197         reset_queues(udc);
2198         udc->usb_state = USB_STATE_DEFAULT;
2199         udc->ep0_state = WAIT_FOR_SETUP;
2200         udc->ep0_dir = USB_DIR_OUT;
2201         qe_usb_enable();
2202         return 0;
2203 }
2204
2205 static int bsy_irq(struct qe_udc *udc)
2206 {
2207         return 0;
2208 }
2209
2210 static int txe_irq(struct qe_udc *udc)
2211 {
2212         return 0;
2213 }
2214
2215 /* ep0 tx interrupt also in here */
2216 static int tx_irq(struct qe_udc *udc)
2217 {
2218         struct qe_ep *ep;
2219         struct qe_bd __iomem *bd;
2220         int i, res = 0;
2221
2222         if ((udc->usb_state == USB_STATE_ADDRESS)
2223                 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2224                 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2225
2226         for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2227                 ep = &udc->eps[i];
2228                 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2229                         bd = ep->c_txbd;
2230                         if (!(in_be32((u32 __iomem *)bd) & T_R)
2231                                                 && (in_be32(&bd->buf))) {
2232                                 /* confirm the transmitted bd */
2233                                 if (ep->epnum == 0)
2234                                         res = qe_ep0_txconf(ep);
2235                                 else
2236                                         res = qe_ep_txconf(ep);
2237                         }
2238                 }
2239         }
2240         return res;
2241 }
2242
2243
2244 /* setup packect's rx is handle in the function too */
2245 static void rx_irq(struct qe_udc *udc)
2246 {
2247         struct qe_ep *ep;
2248         struct qe_bd __iomem *bd;
2249         int i;
2250
2251         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2252                 ep = &udc->eps[i];
2253                 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2254                         bd = ep->n_rxbd;
2255                         if (!(in_be32((u32 __iomem *)bd) & R_E)
2256                                                 && (in_be32(&bd->buf))) {
2257                                 if (ep->epnum == 0) {
2258                                         qe_ep0_rx(udc);
2259                                 } else {
2260                                         /*non-setup package receive*/
2261                                         qe_ep_rx(ep);
2262                                 }
2263                         }
2264                 }
2265         }
2266 }
2267
2268 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2269 {
2270         struct qe_udc *udc = (struct qe_udc *)_udc;
2271         u16 irq_src;
2272         irqreturn_t status = IRQ_NONE;
2273         unsigned long flags;
2274
2275         spin_lock_irqsave(&udc->lock, flags);
2276
2277         irq_src = in_be16(&udc->usb_regs->usb_usber) &
2278                 in_be16(&udc->usb_regs->usb_usbmr);
2279         /* Clear notification bits */
2280         out_be16(&udc->usb_regs->usb_usber, irq_src);
2281         /* USB Interrupt */
2282         if (irq_src & USB_E_IDLE_MASK) {
2283                 idle_irq(udc);
2284                 irq_src &= ~USB_E_IDLE_MASK;
2285                 status = IRQ_HANDLED;
2286         }
2287
2288         if (irq_src & USB_E_TXB_MASK) {
2289                 tx_irq(udc);
2290                 irq_src &= ~USB_E_TXB_MASK;
2291                 status = IRQ_HANDLED;
2292         }
2293
2294         if (irq_src & USB_E_RXB_MASK) {
2295                 rx_irq(udc);
2296                 irq_src &= ~USB_E_RXB_MASK;
2297                 status = IRQ_HANDLED;
2298         }
2299
2300         if (irq_src & USB_E_RESET_MASK) {
2301                 reset_irq(udc);
2302                 irq_src &= ~USB_E_RESET_MASK;
2303                 status = IRQ_HANDLED;
2304         }
2305
2306         if (irq_src & USB_E_BSY_MASK) {
2307                 bsy_irq(udc);
2308                 irq_src &= ~USB_E_BSY_MASK;
2309                 status = IRQ_HANDLED;
2310         }
2311
2312         if (irq_src & USB_E_TXE_MASK) {
2313                 txe_irq(udc);
2314                 irq_src &= ~USB_E_TXE_MASK;
2315                 status = IRQ_HANDLED;
2316         }
2317
2318         spin_unlock_irqrestore(&udc->lock, flags);
2319
2320         return status;
2321 }
2322
2323 /*-------------------------------------------------------------------------
2324         Gadget driver probe and unregister.
2325  --------------------------------------------------------------------------*/
2326 static int fsl_qe_start(struct usb_gadget_driver *driver,
2327                 int (*bind)(struct usb_gadget *))
2328 {
2329         int retval;
2330         unsigned long flags = 0;
2331
2332         /* standard operations */
2333         if (!udc_controller)
2334                 return -ENODEV;
2335
2336         if (!driver || driver->speed < USB_SPEED_FULL
2337                         || !bind || !driver->disconnect || !driver->setup)
2338                 return -EINVAL;
2339
2340         if (udc_controller->driver)
2341                 return -EBUSY;
2342
2343         /* lock is needed but whether should use this lock or another */
2344         spin_lock_irqsave(&udc_controller->lock, flags);
2345
2346         driver->driver.bus = NULL;
2347         /* hook up the driver */
2348         udc_controller->driver = driver;
2349         udc_controller->gadget.dev.driver = &driver->driver;
2350         udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2351         spin_unlock_irqrestore(&udc_controller->lock, flags);
2352
2353         retval = bind(&udc_controller->gadget);
2354         if (retval) {
2355                 dev_err(udc_controller->dev, "bind to %s --> %d",
2356                                 driver->driver.name, retval);
2357                 udc_controller->gadget.dev.driver = NULL;
2358                 udc_controller->driver = NULL;
2359                 return retval;
2360         }
2361
2362         /* Enable IRQ reg and Set usbcmd reg EN bit */
2363         qe_usb_enable();
2364
2365         out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2366         out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2367         udc_controller->usb_state = USB_STATE_ATTACHED;
2368         udc_controller->ep0_state = WAIT_FOR_SETUP;
2369         udc_controller->ep0_dir = USB_DIR_OUT;
2370         dev_info(udc_controller->dev, "%s bind to driver %s \n",
2371                 udc_controller->gadget.name, driver->driver.name);
2372         return 0;
2373 }
2374
2375 static int fsl_qe_stop(struct usb_gadget_driver *driver)
2376 {
2377         struct qe_ep *loop_ep;
2378         unsigned long flags;
2379
2380         if (!udc_controller)
2381                 return -ENODEV;
2382
2383         if (!driver || driver != udc_controller->driver)
2384                 return -EINVAL;
2385
2386         /* stop usb controller, disable intr */
2387         qe_usb_disable();
2388
2389         /* in fact, no needed */
2390         udc_controller->usb_state = USB_STATE_ATTACHED;
2391         udc_controller->ep0_state = WAIT_FOR_SETUP;
2392         udc_controller->ep0_dir = 0;
2393
2394         /* stand operation */
2395         spin_lock_irqsave(&udc_controller->lock, flags);
2396         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2397         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2398         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2399                                 ep.ep_list)
2400                 nuke(loop_ep, -ESHUTDOWN);
2401         spin_unlock_irqrestore(&udc_controller->lock, flags);
2402
2403         /* report disconnect; the controller is already quiesced */
2404         driver->disconnect(&udc_controller->gadget);
2405
2406         /* unbind gadget and unhook driver. */
2407         driver->unbind(&udc_controller->gadget);
2408         udc_controller->gadget.dev.driver = NULL;
2409         udc_controller->driver = NULL;
2410
2411         dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2412                         driver->driver.name);
2413         return 0;
2414 }
2415
2416 /* udc structure's alloc and setup, include ep-param alloc */
2417 static struct qe_udc __devinit *qe_udc_config(struct platform_device *ofdev)
2418 {
2419         struct qe_udc *udc;
2420         struct device_node *np = ofdev->dev.of_node;
2421         unsigned int tmp_addr = 0;
2422         struct usb_device_para __iomem *usbpram;
2423         unsigned int i;
2424         u64 size;
2425         u32 offset;
2426
2427         udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2428         if (udc == NULL) {
2429                 dev_err(&ofdev->dev, "malloc udc failed\n");
2430                 goto cleanup;
2431         }
2432
2433         udc->dev = &ofdev->dev;
2434
2435         /* get default address of usb parameter in MURAM from device tree */
2436         offset = *of_get_address(np, 1, &size, NULL);
2437         udc->usb_param = cpm_muram_addr(offset);
2438         memset_io(udc->usb_param, 0, size);
2439
2440         usbpram = udc->usb_param;
2441         out_be16(&usbpram->frame_n, 0);
2442         out_be32(&usbpram->rstate, 0);
2443
2444         tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2445                                         sizeof(struct usb_ep_para)),
2446                                            USB_EP_PARA_ALIGNMENT);
2447         if (IS_ERR_VALUE(tmp_addr))
2448                 goto cleanup;
2449
2450         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2451                 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2452                 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2453                 tmp_addr += 32;
2454         }
2455
2456         memset_io(udc->ep_param[0], 0,
2457                         USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2458
2459         udc->resume_state = USB_STATE_NOTATTACHED;
2460         udc->usb_state = USB_STATE_POWERED;
2461         udc->ep0_dir = 0;
2462
2463         spin_lock_init(&udc->lock);
2464         return udc;
2465
2466 cleanup:
2467         kfree(udc);
2468         return NULL;
2469 }
2470
2471 /* USB Controller register init */
2472 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2473 {
2474         struct usb_ctlr __iomem *qe_usbregs;
2475         qe_usbregs = udc->usb_regs;
2476
2477         /* Spec says that we must enable the USB controller to change mode. */
2478         out_8(&qe_usbregs->usb_usmod, 0x01);
2479         /* Mode changed, now disable it, since muram isn't initialized yet. */
2480         out_8(&qe_usbregs->usb_usmod, 0x00);
2481
2482         /* Initialize the rest. */
2483         out_be16(&qe_usbregs->usb_usbmr, 0);
2484         out_8(&qe_usbregs->usb_uscom, 0);
2485         out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2486
2487         return 0;
2488 }
2489
2490 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2491 {
2492         struct qe_ep *ep = &udc->eps[pipe_num];
2493
2494         ep->udc = udc;
2495         strcpy(ep->name, ep_name[pipe_num]);
2496         ep->ep.name = ep_name[pipe_num];
2497
2498         ep->ep.ops = &qe_ep_ops;
2499         ep->stopped = 1;
2500         ep->ep.maxpacket = (unsigned short) ~0;
2501         ep->desc = NULL;
2502         ep->dir = 0xff;
2503         ep->epnum = (u8)pipe_num;
2504         ep->sent = 0;
2505         ep->last = 0;
2506         ep->init = 0;
2507         ep->rxframe = NULL;
2508         ep->txframe = NULL;
2509         ep->tx_req = NULL;
2510         ep->state = EP_STATE_IDLE;
2511         ep->has_data = 0;
2512
2513         /* the queue lists any req for this ep */
2514         INIT_LIST_HEAD(&ep->queue);
2515
2516         /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2517         if (pipe_num != 0)
2518                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2519
2520         ep->gadget = &udc->gadget;
2521
2522         return 0;
2523 }
2524
2525 /*-----------------------------------------------------------------------
2526  *      UDC device Driver operation functions                           *
2527  *----------------------------------------------------------------------*/
2528 static void qe_udc_release(struct device *dev)
2529 {
2530         int i = 0;
2531
2532         complete(udc_controller->done);
2533         cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2534         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2535                 udc_controller->ep_param[i] = NULL;
2536
2537         kfree(udc_controller);
2538         udc_controller = NULL;
2539 }
2540
2541 /* Driver probe functions */
2542 static const struct of_device_id qe_udc_match[];
2543 static int __devinit qe_udc_probe(struct platform_device *ofdev)
2544 {
2545         const struct of_device_id *match;
2546         struct device_node *np = ofdev->dev.of_node;
2547         struct qe_ep *ep;
2548         unsigned int ret = 0;
2549         unsigned int i;
2550         const void *prop;
2551
2552         match = of_match_device(qe_udc_match, &ofdev->dev);
2553         if (!match)
2554                 return -EINVAL;
2555
2556         prop = of_get_property(np, "mode", NULL);
2557         if (!prop || strcmp(prop, "peripheral"))
2558                 return -ENODEV;
2559
2560         /* Initialize the udc structure including QH member and other member */
2561         udc_controller = qe_udc_config(ofdev);
2562         if (!udc_controller) {
2563                 dev_err(&ofdev->dev, "failed to initialize\n");
2564                 return -ENOMEM;
2565         }
2566
2567         udc_controller->soc_type = (unsigned long)match->data;
2568         udc_controller->usb_regs = of_iomap(np, 0);
2569         if (!udc_controller->usb_regs) {
2570                 ret = -ENOMEM;
2571                 goto err1;
2572         }
2573
2574         /* initialize usb hw reg except for regs for EP,
2575          * leave usbintr reg untouched*/
2576         qe_udc_reg_init(udc_controller);
2577
2578         /* here comes the stand operations for probe
2579          * set the qe_udc->gadget.xxx */
2580         udc_controller->gadget.ops = &qe_gadget_ops;
2581
2582         /* gadget.ep0 is a pointer */
2583         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2584
2585         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2586
2587         /* modify in register gadget process */
2588         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2589
2590         /* name: Identifies the controller hardware type. */
2591         udc_controller->gadget.name = driver_name;
2592
2593         device_initialize(&udc_controller->gadget.dev);
2594
2595         dev_set_name(&udc_controller->gadget.dev, "gadget");
2596
2597         udc_controller->gadget.dev.release = qe_udc_release;
2598         udc_controller->gadget.dev.parent = &ofdev->dev;
2599
2600         /* initialize qe_ep struct */
2601         for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2602                 /* because the ep type isn't decide here so
2603                  * qe_ep_init() should be called in ep_enable() */
2604
2605                 /* setup the qe_ep struct and link ep.ep.list
2606                  * into gadget.ep_list */
2607                 qe_ep_config(udc_controller, (unsigned char)i);
2608         }
2609
2610         /* ep0 initialization in here */
2611         ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2612         if (ret)
2613                 goto err2;
2614
2615         /* create a buf for ZLP send, need to remain zeroed */
2616         udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2617         if (udc_controller->nullbuf == NULL) {
2618                 dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
2619                 ret = -ENOMEM;
2620                 goto err3;
2621         }
2622
2623         /* buffer for data of get_status request */
2624         udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2625         if (udc_controller->statusbuf == NULL) {
2626                 ret = -ENOMEM;
2627                 goto err4;
2628         }
2629
2630         udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2631         if (udc_controller->nullp == DMA_ADDR_INVALID) {
2632                 udc_controller->nullp = dma_map_single(
2633                                         udc_controller->gadget.dev.parent,
2634                                         udc_controller->nullbuf,
2635                                         256,
2636                                         DMA_TO_DEVICE);
2637                 udc_controller->nullmap = 1;
2638         } else {
2639                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2640                                         udc_controller->nullp, 256,
2641                                         DMA_TO_DEVICE);
2642         }
2643
2644         tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2645                         (unsigned long)udc_controller);
2646         /* request irq and disable DR  */
2647         udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2648         if (!udc_controller->usb_irq) {
2649                 ret = -EINVAL;
2650                 goto err_noirq;
2651         }
2652
2653         ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2654                                 driver_name, udc_controller);
2655         if (ret) {
2656                 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2657                         udc_controller->usb_irq, ret);
2658                 goto err5;
2659         }
2660
2661         ret = device_add(&udc_controller->gadget.dev);
2662         if (ret)
2663                 goto err6;
2664
2665         ret = usb_add_gadget_udc(&ofdev->dev, &udc_controller->gadget);
2666         if (ret)
2667                 goto err7;
2668
2669         dev_info(udc_controller->dev,
2670                         "%s USB controller initialized as device\n",
2671                         (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2672         return 0;
2673
2674 err7:
2675         device_unregister(&udc_controller->gadget.dev);
2676 err6:
2677         free_irq(udc_controller->usb_irq, udc_controller);
2678 err5:
2679         irq_dispose_mapping(udc_controller->usb_irq);
2680 err_noirq:
2681         if (udc_controller->nullmap) {
2682                 dma_unmap_single(udc_controller->gadget.dev.parent,
2683                         udc_controller->nullp, 256,
2684                                 DMA_TO_DEVICE);
2685                         udc_controller->nullp = DMA_ADDR_INVALID;
2686         } else {
2687                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2688                         udc_controller->nullp, 256,
2689                                 DMA_TO_DEVICE);
2690         }
2691         kfree(udc_controller->statusbuf);
2692 err4:
2693         kfree(udc_controller->nullbuf);
2694 err3:
2695         ep = &udc_controller->eps[0];
2696         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2697         kfree(ep->rxframe);
2698         kfree(ep->rxbuffer);
2699         kfree(ep->txframe);
2700 err2:
2701         iounmap(udc_controller->usb_regs);
2702 err1:
2703         kfree(udc_controller);
2704         udc_controller = NULL;
2705         return ret;
2706 }
2707
2708 #ifdef CONFIG_PM
2709 static int qe_udc_suspend(struct platform_device *dev, pm_message_t state)
2710 {
2711         return -ENOTSUPP;
2712 }
2713
2714 static int qe_udc_resume(struct platform_device *dev)
2715 {
2716         return -ENOTSUPP;
2717 }
2718 #endif
2719
2720 static int __devexit qe_udc_remove(struct platform_device *ofdev)
2721 {
2722         struct qe_ep *ep;
2723         unsigned int size;
2724
2725         DECLARE_COMPLETION(done);
2726
2727         if (!udc_controller)
2728                 return -ENODEV;
2729
2730         usb_del_gadget_udc(&udc_controller->gadget);
2731
2732         udc_controller->done = &done;
2733         tasklet_disable(&udc_controller->rx_tasklet);
2734
2735         if (udc_controller->nullmap) {
2736                 dma_unmap_single(udc_controller->gadget.dev.parent,
2737                         udc_controller->nullp, 256,
2738                                 DMA_TO_DEVICE);
2739                         udc_controller->nullp = DMA_ADDR_INVALID;
2740         } else {
2741                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2742                         udc_controller->nullp, 256,
2743                                 DMA_TO_DEVICE);
2744         }
2745         kfree(udc_controller->statusbuf);
2746         kfree(udc_controller->nullbuf);
2747
2748         ep = &udc_controller->eps[0];
2749         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2750         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2751
2752         kfree(ep->rxframe);
2753         if (ep->rxbufmap) {
2754                 dma_unmap_single(udc_controller->gadget.dev.parent,
2755                                 ep->rxbuf_d, size,
2756                                 DMA_FROM_DEVICE);
2757                 ep->rxbuf_d = DMA_ADDR_INVALID;
2758         } else {
2759                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2760                                 ep->rxbuf_d, size,
2761                                 DMA_FROM_DEVICE);
2762         }
2763
2764         kfree(ep->rxbuffer);
2765         kfree(ep->txframe);
2766
2767         free_irq(udc_controller->usb_irq, udc_controller);
2768         irq_dispose_mapping(udc_controller->usb_irq);
2769
2770         tasklet_kill(&udc_controller->rx_tasklet);
2771
2772         iounmap(udc_controller->usb_regs);
2773
2774         device_unregister(&udc_controller->gadget.dev);
2775         /* wait for release() of gadget.dev to free udc */
2776         wait_for_completion(&done);
2777
2778         return 0;
2779 }
2780
2781 /*-------------------------------------------------------------------------*/
2782 static const struct of_device_id qe_udc_match[] __devinitconst = {
2783         {
2784                 .compatible = "fsl,mpc8323-qe-usb",
2785                 .data = (void *)PORT_QE,
2786         },
2787         {
2788                 .compatible = "fsl,mpc8360-qe-usb",
2789                 .data = (void *)PORT_QE,
2790         },
2791         {
2792                 .compatible = "fsl,mpc8272-cpm-usb",
2793                 .data = (void *)PORT_CPM,
2794         },
2795         {},
2796 };
2797
2798 MODULE_DEVICE_TABLE(of, qe_udc_match);
2799
2800 static struct platform_driver udc_driver = {
2801         .driver = {
2802                 .name = (char *)driver_name,
2803                 .owner = THIS_MODULE,
2804                 .of_match_table = qe_udc_match,
2805         },
2806         .probe          = qe_udc_probe,
2807         .remove         = __devexit_p(qe_udc_remove),
2808 #ifdef CONFIG_PM
2809         .suspend        = qe_udc_suspend,
2810         .resume         = qe_udc_resume,
2811 #endif
2812 };
2813
2814 static int __init qe_udc_init(void)
2815 {
2816         printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2817                         DRIVER_VERSION);
2818         return platform_driver_register(&udc_driver);
2819 }
2820
2821 static void __exit qe_udc_exit(void)
2822 {
2823         platform_driver_unregister(&udc_driver);
2824 }
2825
2826 module_init(qe_udc_init);
2827 module_exit(qe_udc_exit);
2828
2829 MODULE_DESCRIPTION(DRIVER_DESC);
2830 MODULE_AUTHOR(DRIVER_AUTHOR);
2831 MODULE_LICENSE("GPL");
2832