git.oblomov.eu Git - linux-2.6/blob - 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_platform.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/usb/ch9.h>
  38 #include <linux/usb/gadget.h>
  39 #include <linux/usb/otg.h>
  40 #include <asm/qe.h>
  41 #include <asm/cpm.h>
  42 #include <asm/dma.h>
  43 #include <asm/reg.h>
  44 #include "fsl_qe_udc.h"
  45
  46 #define DRIVER_DESC     "Freescale QE/CPM USB Device Controller driver"
  47 #define DRIVER_AUTHOR   "Xie XiaoBo"
  48 #define DRIVER_VERSION  "1.0"
  49
  50 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  51
  52 static const char driver_name[] = "fsl_qe_udc";
  53 static const char driver_desc[] = DRIVER_DESC;
  54
  55 /*ep name is important in gadget, it should obey the convention of ep_match()*/
  56 static const char *const ep_name[] = {
  57         "ep0-control", /* everyone has ep0 */
  58         /* 3 configurable endpoints */
  59         "ep1",
  60         "ep2",
  61         "ep3",
  62 };
  63
  64 static struct usb_endpoint_descriptor qe_ep0_desc = {
  65         .bLength =              USB_DT_ENDPOINT_SIZE,
  66         .bDescriptorType =      USB_DT_ENDPOINT,
  67
  68         .bEndpointAddress =     0,
  69         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
  70         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
  71 };
  72
  73 /* it is initialized in probe()  */
  74 static struct qe_udc *udc_controller;
  75
  76 /********************************************************************
  77  *      Internal Used Function Start
  78 ********************************************************************/
  79 /*-----------------------------------------------------------------
  80  * done() - retire a request; caller blocked irqs
  81  *--------------------------------------------------------------*/
  82 static void done(struct qe_ep *ep, struct qe_req *req, int status)
  83 {
  84         struct qe_udc *udc = ep->udc;
  85         unsigned char stopped = ep->stopped;
  86
  87         /* the req->queue pointer is used by ep_queue() func, in which
  88          * the request will be added into a udc_ep->queue 'd tail
  89          * so here the req will be dropped from the ep->queue
  90          */
  91         list_del_init(&req->queue);
  92
  93         /* req.status should be set as -EINPROGRESS in ep_queue() */
  94         if (req->req.status == -EINPROGRESS)
  95                 req->req.status = status;
  96         else
  97                 status = req->req.status;
  98
  99         if (req->mapped) {
 100                 dma_unmap_single(udc->gadget.dev.parent,
 101                         req->req.dma, req->req.length,
 102                         ep_is_in(ep)
 103                                 ? DMA_TO_DEVICE
 104                                 : DMA_FROM_DEVICE);
 105                 req->req.dma = DMA_ADDR_INVALID;
 106                 req->mapped = 0;
 107         } else
 108                 dma_sync_single_for_cpu(udc->gadget.dev.parent,
 109                         req->req.dma, req->req.length,
 110                         ep_is_in(ep)
 111                                 ? DMA_TO_DEVICE
 112                                 : DMA_FROM_DEVICE);
 113
 114         if (status && (status != -ESHUTDOWN))
 115                 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
 116                         ep->ep.name, &req->req, status,
 117                         req->req.actual, req->req.length);
 118
 119         /* don't modify queue heads during completion callback */
 120         ep->stopped = 1;
 121         spin_unlock(&udc->lock);
 122
 123         /* this complete() should a func implemented by gadget layer,
 124          * eg fsg->bulk_in_complete() */
 125         if (req->req.complete)
 126                 req->req.complete(&ep->ep, &req->req);
 127
 128         spin_lock(&udc->lock);
 129
 130         ep->stopped = stopped;
 131 }
 132
 133 /*-----------------------------------------------------------------
 134  * nuke(): delete all requests related to this ep
 135  *--------------------------------------------------------------*/
 136 static void nuke(struct qe_ep *ep, int status)
 137 {
 138         /* Whether this eq has request linked */
 139         while (!list_empty(&ep->queue)) {
 140                 struct qe_req *req = NULL;
 141                 req = list_entry(ep->queue.next, struct qe_req, queue);
 142
 143                 done(ep, req, status);
 144         }
 145 }
 146
 147 /*---------------------------------------------------------------------------*
 148  * USB and Endpoint manipulate process, include parameter and register       *
 149  *---------------------------------------------------------------------------*/
 150 /* @value: 1--set stall 0--clean stall */
 151 static int qe_eprx_stall_change(struct qe_ep *ep, int value)
 152 {
 153         u16 tem_usep;
 154         u8 epnum = ep->epnum;
 155         struct qe_udc *udc = ep->udc;
 156
 157         tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
 158         tem_usep = tem_usep & ~USB_RHS_MASK;
 159         if (value == 1)
 160                 tem_usep |= USB_RHS_STALL;
 161         else if (ep->dir == USB_DIR_IN)
 162                 tem_usep |= USB_RHS_IGNORE_OUT;
 163
 164         out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
 165         return 0;
 166 }
 167
 168 static int qe_eptx_stall_change(struct qe_ep *ep, int value)
 169 {
 170         u16 tem_usep;
 171         u8 epnum = ep->epnum;
 172         struct qe_udc *udc = ep->udc;
 173
 174         tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
 175         tem_usep = tem_usep & ~USB_THS_MASK;
 176         if (value == 1)
 177                 tem_usep |= USB_THS_STALL;
 178         else if (ep->dir == USB_DIR_OUT)
 179                 tem_usep |= USB_THS_IGNORE_IN;
 180
 181         out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
 182
 183         return 0;
 184 }
 185
 186 static int qe_ep0_stall(struct qe_udc *udc)
 187 {
 188         qe_eptx_stall_change(&udc->eps[0], 1);
 189         qe_eprx_stall_change(&udc->eps[0], 1);
 190         udc_controller->ep0_state = WAIT_FOR_SETUP;
 191         udc_controller->ep0_dir = 0;
 192         return 0;
 193 }
 194
 195 static int qe_eprx_nack(struct qe_ep *ep)
 196 {
 197         u8 epnum = ep->epnum;
 198         struct qe_udc *udc = ep->udc;
 199
 200         if (ep->state == EP_STATE_IDLE) {
 201                 /* Set the ep's nack */
 202                 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
 203                                 USB_RHS_MASK, USB_RHS_NACK);
 204
 205                 /* Mask Rx and Busy interrupts */
 206                 clrbits16(&udc->usb_regs->usb_usbmr,
 207                                 (USB_E_RXB_MASK | USB_E_BSY_MASK));
 208
 209                 ep->state = EP_STATE_NACK;
 210         }
 211         return 0;
 212 }
 213
 214 static int qe_eprx_normal(struct qe_ep *ep)
 215 {
 216         struct qe_udc *udc = ep->udc;
 217
 218         if (ep->state == EP_STATE_NACK) {
 219                 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
 220                                 USB_RTHS_MASK, USB_THS_IGNORE_IN);
 221
 222                 /* Unmask RX interrupts */
 223                 out_be16(&udc->usb_regs->usb_usber,
 224                                 USB_E_BSY_MASK | USB_E_RXB_MASK);
 225                 setbits16(&udc->usb_regs->usb_usbmr,
 226                                 (USB_E_RXB_MASK | USB_E_BSY_MASK));
 227
 228                 ep->state = EP_STATE_IDLE;
 229                 ep->has_data = 0;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static int qe_ep_cmd_stoptx(struct qe_ep *ep)
 236 {
 237         if (ep->udc->soc_type == PORT_CPM)
 238                 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
 239                                 CPM_USB_STOP_TX_OPCODE);
 240         else
 241                 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
 242                                 ep->epnum, 0);
 243
 244         return 0;
 245 }
 246
 247 static int qe_ep_cmd_restarttx(struct qe_ep *ep)
 248 {
 249         if (ep->udc->soc_type == PORT_CPM)
 250                 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
 251                                 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
 252         else
 253                 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
 254                                 ep->epnum, 0);
 255
 256         return 0;
 257 }
 258
 259 static int qe_ep_flushtxfifo(struct qe_ep *ep)
 260 {
 261         struct qe_udc *udc = ep->udc;
 262         int i;
 263
 264         i = (int)ep->epnum;
 265
 266         qe_ep_cmd_stoptx(ep);
 267         out_8(&udc->usb_regs->usb_uscom,
 268                 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
 269         out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
 270         out_be32(&udc->ep_param[i]->tstate, 0);
 271         out_be16(&udc->ep_param[i]->tbcnt, 0);
 272
 273         ep->c_txbd = ep->txbase;
 274         ep->n_txbd = ep->txbase;
 275         qe_ep_cmd_restarttx(ep);
 276         return 0;
 277 }
 278
 279 static int qe_ep_filltxfifo(struct qe_ep *ep)
 280 {
 281         struct qe_udc *udc = ep->udc;
 282
 283         out_8(&udc->usb_regs->usb_uscom,
 284                         USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
 285         return 0;
 286 }
 287
 288 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
 289 {
 290         struct qe_ep *ep;
 291         u32 bdring_len;
 292         struct qe_bd __iomem *bd;
 293         int i;
 294
 295         ep = &udc->eps[pipe_num];
 296
 297         if (ep->dir == USB_DIR_OUT)
 298                 bdring_len = USB_BDRING_LEN_RX;
 299         else
 300                 bdring_len = USB_BDRING_LEN;
 301
 302         bd = ep->rxbase;
 303         for (i = 0; i < (bdring_len - 1); i++) {
 304                 out_be32((u32 __iomem *)bd, R_E | R_I);
 305                 bd++;
 306         }
 307         out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
 308
 309         bd = ep->txbase;
 310         for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
 311                 out_be32(&bd->buf, 0);
 312                 out_be32((u32 __iomem *)bd, 0);
 313                 bd++;
 314         }
 315         out_be32((u32 __iomem *)bd, T_W);
 316
 317         return 0;
 318 }
 319
 320 static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
 321 {
 322         struct qe_ep *ep;
 323         u16 tmpusep;
 324
 325         ep = &udc->eps[pipe_num];
 326         tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
 327         tmpusep &= ~USB_RTHS_MASK;
 328
 329         switch (ep->dir) {
 330         case USB_DIR_BOTH:
 331                 qe_ep_flushtxfifo(ep);
 332                 break;
 333         case USB_DIR_OUT:
 334                 tmpusep |= USB_THS_IGNORE_IN;
 335                 break;
 336         case USB_DIR_IN:
 337                 qe_ep_flushtxfifo(ep);
 338                 tmpusep |= USB_RHS_IGNORE_OUT;
 339                 break;
 340         default:
 341                 break;
 342         }
 343         out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
 344
 345         qe_epbds_reset(udc, pipe_num);
 346
 347         return 0;
 348 }
 349
 350 static int qe_ep_toggledata01(struct qe_ep *ep)
 351 {
 352         ep->data01 ^= 0x1;
 353         return 0;
 354 }
 355
 356 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
 357 {
 358         struct qe_ep *ep = &udc->eps[pipe_num];
 359         unsigned long tmp_addr = 0;
 360         struct usb_ep_para __iomem *epparam;
 361         int i;
 362         struct qe_bd __iomem *bd;
 363         int bdring_len;
 364
 365         if (ep->dir == USB_DIR_OUT)
 366                 bdring_len = USB_BDRING_LEN_RX;
 367         else
 368                 bdring_len = USB_BDRING_LEN;
 369
 370         epparam = udc->ep_param[pipe_num];
 371         /* alloc multi-ram for BD rings and set the ep parameters */
 372         tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
 373                                 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
 374         if (IS_ERR_VALUE(tmp_addr))
 375                 return -ENOMEM;
 376
 377         out_be16(&epparam->rbase, (u16)tmp_addr);
 378         out_be16(&epparam->tbase, (u16)(tmp_addr +
 379                                 (sizeof(struct qe_bd) * bdring_len)));
 380
 381         out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
 382         out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
 383
 384         ep->rxbase = cpm_muram_addr(tmp_addr);
 385         ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
 386                                 * bdring_len));
 387         ep->n_rxbd = ep->rxbase;
 388         ep->e_rxbd = ep->rxbase;
 389         ep->n_txbd = ep->txbase;
 390         ep->c_txbd = ep->txbase;
 391         ep->data01 = 0; /* data0 */
 392
 393         /* Init TX and RX bds */
 394         bd = ep->rxbase;
 395         for (i = 0; i < bdring_len - 1; i++) {
 396                 out_be32(&bd->buf, 0);
 397                 out_be32((u32 __iomem *)bd, 0);
 398                 bd++;
 399         }
 400         out_be32(&bd->buf, 0);
 401         out_be32((u32 __iomem *)bd, R_W);
 402
 403         bd = ep->txbase;
 404         for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
 405                 out_be32(&bd->buf, 0);
 406                 out_be32((u32 __iomem *)bd, 0);
 407                 bd++;
 408         }
 409         out_be32(&bd->buf, 0);
 410         out_be32((u32 __iomem *)bd, T_W);
 411
 412         return 0;
 413 }
 414
 415 static int qe_ep_rxbd_update(struct qe_ep *ep)
 416 {
 417         unsigned int size;
 418         int i;
 419         unsigned int tmp;
 420         struct qe_bd __iomem *bd;
 421         unsigned int bdring_len;
 422
 423         if (ep->rxbase == NULL)
 424                 return -EINVAL;
 425
 426         bd = ep->rxbase;
 427
 428         ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
 429         if (ep->rxframe == NULL) {
 430                 dev_err(ep->udc->dev, "malloc rxframe failed\n");
 431                 return -ENOMEM;
 432         }
 433
 434         qe_frame_init(ep->rxframe);
 435
 436         if (ep->dir == USB_DIR_OUT)
 437                 bdring_len = USB_BDRING_LEN_RX;
 438         else
 439                 bdring_len = USB_BDRING_LEN;
 440
 441         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
 442         ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
 443         if (ep->rxbuffer == NULL) {
 444                 dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
 445                                 size);
 446                 kfree(ep->rxframe);
 447                 return -ENOMEM;
 448         }
 449
 450         ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
 451         if (ep->rxbuf_d == DMA_ADDR_INVALID) {
 452                 ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
 453                                         ep->rxbuffer,
 454                                         size,
 455                                         DMA_FROM_DEVICE);
 456                 ep->rxbufmap = 1;
 457         } else {
 458                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
 459                                         ep->rxbuf_d, size,
 460                                         DMA_FROM_DEVICE);
 461                 ep->rxbufmap = 0;
 462         }
 463
 464         size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
 465         tmp = ep->rxbuf_d;
 466         tmp = (u32)(((tmp >> 2) << 2) + 4);
 467
 468         for (i = 0; i < bdring_len - 1; i++) {
 469                 out_be32(&bd->buf, tmp);
 470                 out_be32((u32 __iomem *)bd, (R_E | R_I));
 471                 tmp = tmp + size;
 472                 bd++;
 473         }
 474         out_be32(&bd->buf, tmp);
 475         out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
 476
 477         return 0;
 478 }
 479
 480 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
 481 {
 482         struct qe_ep *ep = &udc->eps[pipe_num];
 483         struct usb_ep_para __iomem *epparam;
 484         u16 usep, logepnum;
 485         u16 tmp;
 486         u8 rtfcr = 0;
 487
 488         epparam = udc->ep_param[pipe_num];
 489
 490         usep = 0;
 491         logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 492         usep |= (logepnum << USB_EPNUM_SHIFT);
 493
 494         switch (ep->desc->bmAttributes & 0x03) {
 495         case USB_ENDPOINT_XFER_BULK:
 496                 usep |= USB_TRANS_BULK;
 497                 break;
 498         case USB_ENDPOINT_XFER_ISOC:
 499                 usep |=  USB_TRANS_ISO;
 500                 break;
 501         case USB_ENDPOINT_XFER_INT:
 502                 usep |= USB_TRANS_INT;
 503                 break;
 504         default:
 505                 usep |= USB_TRANS_CTR;
 506                 break;
 507         }
 508
 509         switch (ep->dir) {
 510         case USB_DIR_OUT:
 511                 usep |= USB_THS_IGNORE_IN;
 512                 break;
 513         case USB_DIR_IN:
 514                 usep |= USB_RHS_IGNORE_OUT;
 515                 break;
 516         default:
 517                 break;
 518         }
 519         out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
 520
 521         rtfcr = 0x30;
 522         out_8(&epparam->rbmr, rtfcr);
 523         out_8(&epparam->tbmr, rtfcr);
 524
 525         tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
 526         /* MRBLR must be divisble by 4 */
 527         tmp = (u16)(((tmp >> 2) << 2) + 4);
 528         out_be16(&epparam->mrblr, tmp);
 529
 530         return 0;
 531 }
 532
 533 static int qe_ep_init(struct qe_udc *udc,
 534                       unsigned char pipe_num,
 535                       const struct usb_endpoint_descriptor *desc)
 536 {
 537         struct qe_ep *ep = &udc->eps[pipe_num];
 538         unsigned long flags;
 539         int reval = 0;
 540         u16 max = 0;
 541
 542         max = le16_to_cpu(desc->wMaxPacketSize);
 543
 544         /* check the max package size validate for this endpoint */
 545         /* Refer to USB2.0 spec table 9-13,
 546         */
 547         if (pipe_num != 0) {
 548                 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
 549                 case USB_ENDPOINT_XFER_BULK:
 550                         if (strstr(ep->ep.name, "-iso")
 551                                         || strstr(ep->ep.name, "-int"))
 552                                 goto en_done;
 553                         switch (udc->gadget.speed) {
 554                         case USB_SPEED_HIGH:
 555                         if ((max == 128) || (max == 256) || (max == 512))
 556                                 break;
 557                         default:
 558                                 switch (max) {
 559                                 case 4:
 560                                 case 8:
 561                                 case 16:
 562                                 case 32:
 563                                 case 64:
 564                                         break;
 565                                 default:
 566                                 case USB_SPEED_LOW:
 567                                         goto en_done;
 568                                 }
 569                         }
 570                         break;
 571                 case USB_ENDPOINT_XFER_INT:
 572                         if (strstr(ep->ep.name, "-iso"))        /* bulk is ok */
 573                                 goto en_done;
 574                         switch (udc->gadget.speed) {
 575                         case USB_SPEED_HIGH:
 576                                 if (max <= 1024)
 577                                         break;
 578                         case USB_SPEED_FULL:
 579                                 if (max <= 64)
 580                                         break;
 581                         default:
 582                                 if (max <= 8)
 583                                         break;
 584                                 goto en_done;
 585                         }
 586                         break;
 587                 case USB_ENDPOINT_XFER_ISOC:
 588                         if (strstr(ep->ep.name, "-bulk")
 589                                 || strstr(ep->ep.name, "-int"))
 590                                 goto en_done;
 591                         switch (udc->gadget.speed) {
 592                         case USB_SPEED_HIGH:
 593                                 if (max <= 1024)
 594                                         break;
 595                         case USB_SPEED_FULL:
 596                                 if (max <= 1023)
 597                                         break;
 598                         default:
 599                                 goto en_done;
 600                         }
 601                         break;
 602                 case USB_ENDPOINT_XFER_CONTROL:
 603                         if (strstr(ep->ep.name, "-iso")
 604                                 || strstr(ep->ep.name, "-int"))
 605                                 goto en_done;
 606                         switch (udc->gadget.speed) {
 607                         case USB_SPEED_HIGH:
 608                         case USB_SPEED_FULL:
 609                                 switch (max) {
 610                                 case 1:
 611                                 case 2:
 612                                 case 4:
 613                                 case 8:
 614                                 case 16:
 615                                 case 32:
 616                                 case 64:
 617                                         break;
 618                                 default:
 619                                         goto en_done;
 620                                 }
 621                         case USB_SPEED_LOW:
 622                                 switch (max) {
 623                                 case 1:
 624                                 case 2:
 625                                 case 4:
 626                                 case 8:
 627                                         break;
 628                                 default:
 629                                         goto en_done;
 630                                 }
 631                         default:
 632                                 goto en_done;
 633                         }
 634                         break;
 635
 636                 default:
 637                         goto en_done;
 638                 }
 639         } /* if ep0*/
 640
 641         spin_lock_irqsave(&udc->lock, flags);
 642
 643         /* initialize ep structure */
 644         ep->ep.maxpacket = max;
 645         ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
 646         ep->desc = desc;
 647         ep->stopped = 0;
 648         ep->init = 1;
 649
 650         if (pipe_num == 0) {
 651                 ep->dir = USB_DIR_BOTH;
 652                 udc->ep0_dir = USB_DIR_OUT;
 653                 udc->ep0_state = WAIT_FOR_SETUP;
 654         } else  {
 655                 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
 656                 case USB_DIR_OUT:
 657                         ep->dir = USB_DIR_OUT;
 658                         break;
 659                 case USB_DIR_IN:
 660                         ep->dir = USB_DIR_IN;
 661                 default:
 662                         break;
 663                 }
 664         }
 665
 666         /* hardware special operation */
 667         qe_ep_bd_init(udc, pipe_num);
 668         if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
 669                 reval = qe_ep_rxbd_update(ep);
 670                 if (reval)
 671                         goto en_done1;
 672         }
 673
 674         if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
 675                 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
 676                 if (ep->txframe == NULL) {
 677                         dev_err(udc->dev, "malloc txframe failed\n");
 678                         goto en_done2;
 679                 }
 680                 qe_frame_init(ep->txframe);
 681         }
 682
 683         qe_ep_register_init(udc, pipe_num);
 684
 685         /* Now HW will be NAKing transfers to that EP,
 686          * until a buffer is queued to it. */
 687         spin_unlock_irqrestore(&udc->lock, flags);
 688
 689         return 0;
 690 en_done2:
 691         kfree(ep->rxbuffer);
 692         kfree(ep->rxframe);
 693 en_done1:
 694         spin_unlock_irqrestore(&udc->lock, flags);
 695 en_done:
 696         dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
 697         return -ENODEV;
 698 }
 699
 700 static inline void qe_usb_enable(void)
 701 {
 702         setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
 703 }
 704
 705 static inline void qe_usb_disable(void)
 706 {
 707         clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
 708 }
 709
 710 /*----------------------------------------------------------------------------*
 711  *              USB and EP basic manipulate function end                      *
 712  *----------------------------------------------------------------------------*/
 713
 714
 715 /******************************************************************************
 716                 UDC transmit and receive process
 717  ******************************************************************************/
 718 static void recycle_one_rxbd(struct qe_ep *ep)
 719 {
 720         u32 bdstatus;
 721
 722         bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
 723         bdstatus = R_I | R_E | (bdstatus & R_W);
 724         out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
 725
 726         if (bdstatus & R_W)
 727                 ep->e_rxbd = ep->rxbase;
 728         else
 729                 ep->e_rxbd++;
 730 }
 731
 732 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
 733 {
 734         u32 bdstatus;
 735         struct qe_bd __iomem *bd, *nextbd;
 736         unsigned char stop = 0;
 737
 738         nextbd = ep->n_rxbd;
 739         bd = ep->e_rxbd;
 740         bdstatus = in_be32((u32 __iomem *)bd);
 741
 742         while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
 743                 bdstatus = R_E | R_I | (bdstatus & R_W);
 744                 out_be32((u32 __iomem *)bd, bdstatus);
 745
 746                 if (bdstatus & R_W)
 747                         bd = ep->rxbase;
 748                 else
 749                         bd++;
 750
 751                 bdstatus = in_be32((u32 __iomem *)bd);
 752                 if (stopatnext && (bd == nextbd))
 753                         stop = 1;
 754         }
 755
 756         ep->e_rxbd = bd;
 757 }
 758
 759 static void ep_recycle_rxbds(struct qe_ep *ep)
 760 {
 761         struct qe_bd __iomem *bd = ep->n_rxbd;
 762         u32 bdstatus;
 763         u8 epnum = ep->epnum;
 764         struct qe_udc *udc = ep->udc;
 765
 766         bdstatus = in_be32((u32 __iomem *)bd);
 767         if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
 768                 bd = ep->rxbase +
 769                                 ((in_be16(&udc->ep_param[epnum]->rbptr) -
 770                                   in_be16(&udc->ep_param[epnum]->rbase))
 771                                  >> 3);
 772                 bdstatus = in_be32((u32 __iomem *)bd);
 773
 774                 if (bdstatus & R_W)
 775                         bd = ep->rxbase;
 776                 else
 777                         bd++;
 778
 779                 ep->e_rxbd = bd;
 780                 recycle_rxbds(ep, 0);
 781                 ep->e_rxbd = ep->n_rxbd;
 782         } else
 783                 recycle_rxbds(ep, 1);
 784
 785         if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
 786                 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
 787
 788         if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
 789                 qe_eprx_normal(ep);
 790
 791         ep->localnack = 0;
 792 }
 793
 794 static void setup_received_handle(struct qe_udc *udc,
 795                                         struct usb_ctrlrequest *setup);
 796 static int qe_ep_rxframe_handle(struct qe_ep *ep);
 797 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
 798 /* when BD PID is setup, handle the packet */
 799 static int ep0_setup_handle(struct qe_udc *udc)
 800 {
 801         struct qe_ep *ep = &udc->eps[0];
 802         struct qe_frame *pframe;
 803         unsigned int fsize;
 804         u8 *cp;
 805
 806         pframe = ep->rxframe;
 807         if ((frame_get_info(pframe) & PID_SETUP)
 808                         && (udc->ep0_state == WAIT_FOR_SETUP)) {
 809                 fsize = frame_get_length(pframe);
 810                 if (unlikely(fsize != 8))
 811                         return -EINVAL;
 812                 cp = (u8 *)&udc->local_setup_buff;
 813                 memcpy(cp, pframe->data, fsize);
 814                 ep->data01 = 1;
 815
 816                 /* handle the usb command base on the usb_ctrlrequest */
 817                 setup_received_handle(udc, &udc->local_setup_buff);
 818                 return 0;
 819         }
 820         return -EINVAL;
 821 }
 822
 823 static int qe_ep0_rx(struct qe_udc *udc)
 824 {
 825         struct qe_ep *ep = &udc->eps[0];
 826         struct qe_frame *pframe;
 827         struct qe_bd __iomem *bd;
 828         u32 bdstatus, length;
 829         u32 vaddr;
 830
 831         pframe = ep->rxframe;
 832
 833         if (ep->dir == USB_DIR_IN) {
 834                 dev_err(udc->dev, "ep0 not a control endpoint\n");
 835                 return -EINVAL;
 836         }
 837
 838         bd = ep->n_rxbd;
 839         bdstatus = in_be32((u32 __iomem *)bd);
 840         length = bdstatus & BD_LENGTH_MASK;
 841
 842         while (!(bdstatus & R_E) && length) {
 843                 if ((bdstatus & R_F) && (bdstatus & R_L)
 844                         && !(bdstatus & R_ERROR)) {
 845                         if (length == USB_CRC_SIZE) {
 846                                 udc->ep0_state = WAIT_FOR_SETUP;
 847                                 dev_vdbg(udc->dev,
 848                                         "receive a ZLP in status phase\n");
 849                         } else {
 850                                 qe_frame_clean(pframe);
 851                                 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
 852                                 frame_set_data(pframe, (u8 *)vaddr);
 853                                 frame_set_length(pframe,
 854                                                 (length - USB_CRC_SIZE));
 855                                 frame_set_status(pframe, FRAME_OK);
 856                                 switch (bdstatus & R_PID) {
 857                                 case R_PID_SETUP:
 858                                         frame_set_info(pframe, PID_SETUP);
 859                                         break;
 860                                 case R_PID_DATA1:
 861                                         frame_set_info(pframe, PID_DATA1);
 862                                         break;
 863                                 default:
 864                                         frame_set_info(pframe, PID_DATA0);
 865                                         break;
 866                                 }
 867
 868                                 if ((bdstatus & R_PID) == R_PID_SETUP)
 869                                         ep0_setup_handle(udc);
 870                                 else
 871                                         qe_ep_rxframe_handle(ep);
 872                         }
 873                 } else {
 874                         dev_err(udc->dev, "The receive frame with error!\n");
 875                 }
 876
 877                 /* note: don't clear the rxbd's buffer address */
 878                 recycle_one_rxbd(ep);
 879
 880                 /* Get next BD */
 881                 if (bdstatus & R_W)
 882                         bd = ep->rxbase;
 883                 else
 884                         bd++;
 885
 886                 bdstatus = in_be32((u32 __iomem *)bd);
 887                 length = bdstatus & BD_LENGTH_MASK;
 888
 889         }
 890
 891         ep->n_rxbd = bd;
 892
 893         return 0;
 894 }
 895
 896 static int qe_ep_rxframe_handle(struct qe_ep *ep)
 897 {
 898         struct qe_frame *pframe;
 899         u8 framepid = 0;
 900         unsigned int fsize;
 901         u8 *cp;
 902         struct qe_req *req;
 903
 904         pframe = ep->rxframe;
 905
 906         if (frame_get_info(pframe) & PID_DATA1)
 907                 framepid = 0x1;
 908
 909         if (framepid != ep->data01) {
 910                 dev_err(ep->udc->dev, "the data01 error!\n");
 911                 return -EIO;
 912         }
 913
 914         fsize = frame_get_length(pframe);
 915         if (list_empty(&ep->queue)) {
 916                 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
 917         } else {
 918                 req = list_entry(ep->queue.next, struct qe_req, queue);
 919
 920                 cp = (u8 *)(req->req.buf) + req->req.actual;
 921                 if (cp) {
 922                         memcpy(cp, pframe->data, fsize);
 923                         req->req.actual += fsize;
 924                         if ((fsize < ep->ep.maxpacket) ||
 925                                         (req->req.actual >= req->req.length)) {
 926                                 if (ep->epnum == 0)
 927                                         ep0_req_complete(ep->udc, req);
 928                                 else
 929                                         done(ep, req, 0);
 930                                 if (list_empty(&ep->queue) && ep->epnum != 0)
 931                                         qe_eprx_nack(ep);
 932                         }
 933                 }
 934         }
 935
 936         qe_ep_toggledata01(ep);
 937
 938         return 0;
 939 }
 940
 941 static void ep_rx_tasklet(unsigned long data)
 942 {
 943         struct qe_udc *udc = (struct qe_udc *)data;
 944         struct qe_ep *ep;
 945         struct qe_frame *pframe;
 946         struct qe_bd __iomem *bd;
 947         unsigned long flags;
 948         u32 bdstatus, length;
 949         u32 vaddr, i;
 950
 951         spin_lock_irqsave(&udc->lock, flags);
 952
 953         for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
 954                 ep = &udc->eps[i];
 955
 956                 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
 957                         dev_dbg(udc->dev,
 958                                 "This is a transmit ep or disable tasklet!\n");
 959                         continue;
 960                 }
 961
 962                 pframe = ep->rxframe;
 963                 bd = ep->n_rxbd;
 964                 bdstatus = in_be32((u32 __iomem *)bd);
 965                 length = bdstatus & BD_LENGTH_MASK;
 966
 967                 while (!(bdstatus & R_E) && length) {
 968                         if (list_empty(&ep->queue)) {
 969                                 qe_eprx_nack(ep);
 970                                 dev_dbg(udc->dev,
 971                                         "The rxep have noreq %d\n",
 972                                         ep->has_data);
 973                                 break;
 974                         }
 975
 976                         if ((bdstatus & R_F) && (bdstatus & R_L)
 977                                 && !(bdstatus & R_ERROR)) {
 978                                 qe_frame_clean(pframe);
 979                                 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
 980                                 frame_set_data(pframe, (u8 *)vaddr);
 981                                 frame_set_length(pframe,
 982                                                 (length - USB_CRC_SIZE));
 983                                 frame_set_status(pframe, FRAME_OK);
 984                                 switch (bdstatus & R_PID) {
 985                                 case R_PID_DATA1:
 986                                         frame_set_info(pframe, PID_DATA1);
 987                                         break;
 988                                 case R_PID_SETUP:
 989                                         frame_set_info(pframe, PID_SETUP);
 990                                         break;
 991                                 default:
 992                                         frame_set_info(pframe, PID_DATA0);
 993                                         break;
 994                                 }
 995                                 /* handle the rx frame */
 996                                 qe_ep_rxframe_handle(ep);
 997                         } else {
 998                                 dev_err(udc->dev,
 999                                         "error in received frame\n");
1000                         }
1001                         /* note: don't clear the rxbd's buffer address */
1002                         /*clear the length */
1003                         out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
1004                         ep->has_data--;
1005                         if (!(ep->localnack))
1006                                 recycle_one_rxbd(ep);
1007
1008                         /* Get next BD */
1009                         if (bdstatus & R_W)
1010                                 bd = ep->rxbase;
1011                         else
1012                                 bd++;
1013
1014                         bdstatus = in_be32((u32 __iomem *)bd);
1015                         length = bdstatus & BD_LENGTH_MASK;
1016                 }
1017
1018                 ep->n_rxbd = bd;
1019
1020                 if (ep->localnack)
1021                         ep_recycle_rxbds(ep);
1022
1023                 ep->enable_tasklet = 0;
1024         } /* for i=1 */
1025
1026         spin_unlock_irqrestore(&udc->lock, flags);
1027 }
1028
1029 static int qe_ep_rx(struct qe_ep *ep)
1030 {
1031         struct qe_udc *udc;
1032         struct qe_frame *pframe;
1033         struct qe_bd __iomem *bd;
1034         u16 swoffs, ucoffs, emptybds;
1035
1036         udc = ep->udc;
1037         pframe = ep->rxframe;
1038
1039         if (ep->dir == USB_DIR_IN) {
1040                 dev_err(udc->dev, "transmit ep in rx function\n");
1041                 return -EINVAL;
1042         }
1043
1044         bd = ep->n_rxbd;
1045
1046         swoffs = (u16)(bd - ep->rxbase);
1047         ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1048                         in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1049         if (swoffs < ucoffs)
1050                 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1051         else
1052                 emptybds = swoffs - ucoffs;
1053
1054         if (emptybds < MIN_EMPTY_BDS) {
1055                 qe_eprx_nack(ep);
1056                 ep->localnack = 1;
1057                 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1058         }
1059         ep->has_data = USB_BDRING_LEN_RX - emptybds;
1060
1061         if (list_empty(&ep->queue)) {
1062                 qe_eprx_nack(ep);
1063                 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1064                                 ep->has_data);
1065                 return 0;
1066         }
1067
1068         tasklet_schedule(&udc->rx_tasklet);
1069         ep->enable_tasklet = 1;
1070
1071         return 0;
1072 }
1073
1074 /* send data from a frame, no matter what tx_req */
1075 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1076 {
1077         struct qe_udc *udc = ep->udc;
1078         struct qe_bd __iomem *bd;
1079         u16 saveusbmr;
1080         u32 bdstatus, pidmask;
1081         u32 paddr;
1082
1083         if (ep->dir == USB_DIR_OUT) {
1084                 dev_err(udc->dev, "receive ep passed to tx function\n");
1085                 return -EINVAL;
1086         }
1087
1088         /* Disable the Tx interrupt */
1089         saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1090         out_be16(&udc->usb_regs->usb_usbmr,
1091                         saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1092
1093         bd = ep->n_txbd;
1094         bdstatus = in_be32((u32 __iomem *)bd);
1095
1096         if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1097                 if (frame_get_length(frame) == 0) {
1098                         frame_set_data(frame, udc->nullbuf);
1099                         frame_set_length(frame, 2);
1100                         frame->info |= (ZLP | NO_CRC);
1101                         dev_vdbg(udc->dev, "the frame size = 0\n");
1102                 }
1103                 paddr = virt_to_phys((void *)frame->data);
1104                 out_be32(&bd->buf, paddr);
1105                 bdstatus = (bdstatus&T_W);
1106                 if (!(frame_get_info(frame) & NO_CRC))
1107                         bdstatus |= T_R | T_I | T_L | T_TC
1108                                         | frame_get_length(frame);
1109                 else
1110                         bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1111
1112                 /* if the packet is a ZLP in status phase */
1113                 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1114                         ep->data01 = 0x1;
1115
1116                 if (ep->data01) {
1117                         pidmask = T_PID_DATA1;
1118                         frame->info |= PID_DATA1;
1119                 } else {
1120                         pidmask = T_PID_DATA0;
1121                         frame->info |= PID_DATA0;
1122                 }
1123                 bdstatus |= T_CNF;
1124                 bdstatus |= pidmask;
1125                 out_be32((u32 __iomem *)bd, bdstatus);
1126                 qe_ep_filltxfifo(ep);
1127
1128                 /* enable the TX interrupt */
1129                 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1130
1131                 qe_ep_toggledata01(ep);
1132                 if (bdstatus & T_W)
1133                         ep->n_txbd = ep->txbase;
1134                 else
1135                         ep->n_txbd++;
1136
1137                 return 0;
1138         } else {
1139                 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1140                 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1141                 return -EBUSY;
1142         }
1143 }
1144
1145 /* when a bd was transmitted, the function can
1146  * handle the tx_req, not include ep0           */
1147 static int txcomplete(struct qe_ep *ep, unsigned char restart)
1148 {
1149         if (ep->tx_req != NULL) {
1150                 if (!restart) {
1151                         int asent = ep->last;
1152                         ep->sent += asent;
1153                         ep->last -= asent;
1154                 } else {
1155                         ep->last = 0;
1156                 }
1157
1158                 /* a request already were transmitted completely */
1159                 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1160                         ep->tx_req->req.actual = (unsigned int)ep->sent;
1161                         done(ep, ep->tx_req, 0);
1162                         ep->tx_req = NULL;
1163                         ep->last = 0;
1164                         ep->sent = 0;
1165                 }
1166         }
1167
1168         /* we should gain a new tx_req fot this endpoint */
1169         if (ep->tx_req == NULL) {
1170                 if (!list_empty(&ep->queue)) {
1171                         ep->tx_req = list_entry(ep->queue.next, struct qe_req,
1172                                                         queue);
1173                         ep->last = 0;
1174                         ep->sent = 0;
1175                 }
1176         }
1177
1178         return 0;
1179 }
1180
1181 /* give a frame and a tx_req, send some data */
1182 static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
1183 {
1184         unsigned int size;
1185         u8 *buf;
1186
1187         qe_frame_clean(frame);
1188         size = min_t(u32, (ep->tx_req->req.length - ep->sent),
1189                                 ep->ep.maxpacket);
1190         buf = (u8 *)ep->tx_req->req.buf + ep->sent;
1191         if (buf && size) {
1192                 ep->last = size;
1193                 frame_set_data(frame, buf);
1194                 frame_set_length(frame, size);
1195                 frame_set_status(frame, FRAME_OK);
1196                 frame_set_info(frame, 0);
1197                 return qe_ep_tx(ep, frame);
1198         }
1199         return -EIO;
1200 }
1201
1202 /* give a frame struct,send a ZLP */
1203 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1204 {
1205         struct qe_udc *udc = ep->udc;
1206
1207         if (frame == NULL)
1208                 return -ENODEV;
1209
1210         qe_frame_clean(frame);
1211         frame_set_data(frame, (u8 *)udc->nullbuf);
1212         frame_set_length(frame, 2);
1213         frame_set_status(frame, FRAME_OK);
1214         frame_set_info(frame, (ZLP | NO_CRC | infor));
1215
1216         return qe_ep_tx(ep, frame);
1217 }
1218
1219 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1220 {
1221         struct qe_req *req = ep->tx_req;
1222         int reval;
1223
1224         if (req == NULL)
1225                 return -ENODEV;
1226
1227         if ((req->req.length - ep->sent) > 0)
1228                 reval = qe_usb_senddata(ep, frame);
1229         else
1230                 reval = sendnulldata(ep, frame, 0);
1231
1232         return reval;
1233 }
1234
1235 /* if direction is DIR_IN, the status is Device->Host
1236  * if direction is DIR_OUT, the status transaction is Device<-Host
1237  * in status phase, udc create a request and gain status */
1238 static int ep0_prime_status(struct qe_udc *udc, int direction)
1239 {
1240
1241         struct qe_ep *ep = &udc->eps[0];
1242
1243         if (direction == USB_DIR_IN) {
1244                 udc->ep0_state = DATA_STATE_NEED_ZLP;
1245                 udc->ep0_dir = USB_DIR_IN;
1246                 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1247         } else {
1248                 udc->ep0_dir = USB_DIR_OUT;
1249                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1250         }
1251
1252         return 0;
1253 }
1254
1255 /* a request complete in ep0, whether gadget request or udc request */
1256 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1257 {
1258         struct qe_ep *ep = &udc->eps[0];
1259         /* because usb and ep's status already been set in ch9setaddress() */
1260
1261         switch (udc->ep0_state) {
1262         case DATA_STATE_XMIT:
1263                 done(ep, req, 0);
1264                 /* receive status phase */
1265                 if (ep0_prime_status(udc, USB_DIR_OUT))
1266                         qe_ep0_stall(udc);
1267                 break;
1268
1269         case DATA_STATE_NEED_ZLP:
1270                 done(ep, req, 0);
1271                 udc->ep0_state = WAIT_FOR_SETUP;
1272                 break;
1273
1274         case DATA_STATE_RECV:
1275                 done(ep, req, 0);
1276                 /* send status phase */
1277                 if (ep0_prime_status(udc, USB_DIR_IN))
1278                         qe_ep0_stall(udc);
1279                 break;
1280
1281         case WAIT_FOR_OUT_STATUS:
1282                 done(ep, req, 0);
1283                 udc->ep0_state = WAIT_FOR_SETUP;
1284                 break;
1285
1286         case WAIT_FOR_SETUP:
1287                 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1288                 break;
1289
1290         default:
1291                 qe_ep0_stall(udc);
1292                 break;
1293         }
1294 }
1295
1296 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1297 {
1298         struct qe_req *tx_req = NULL;
1299         struct qe_frame *frame = ep->txframe;
1300
1301         if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1302                 if (!restart)
1303                         ep->udc->ep0_state = WAIT_FOR_SETUP;
1304                 else
1305                         sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1306                 return 0;
1307         }
1308
1309         tx_req = ep->tx_req;
1310         if (tx_req != NULL) {
1311                 if (!restart) {
1312                         int asent = ep->last;
1313                         ep->sent += asent;
1314                         ep->last -= asent;
1315                 } else {
1316                         ep->last = 0;
1317                 }
1318
1319                 /* a request already were transmitted completely */
1320                 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1321                         ep->tx_req->req.actual = (unsigned int)ep->sent;
1322                         ep0_req_complete(ep->udc, ep->tx_req);
1323                         ep->tx_req = NULL;
1324                         ep->last = 0;
1325                         ep->sent = 0;
1326                 }
1327         } else {
1328                 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1329         }
1330
1331         return 0;
1332 }
1333
1334 static int ep0_txframe_handle(struct qe_ep *ep)
1335 {
1336         /* if have error, transmit again */
1337         if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1338                 qe_ep_flushtxfifo(ep);
1339                 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1340                 if (frame_get_info(ep->txframe) & PID_DATA0)
1341                         ep->data01 = 0;
1342                 else
1343                         ep->data01 = 1;
1344
1345                 ep0_txcomplete(ep, 1);
1346         } else
1347                 ep0_txcomplete(ep, 0);
1348
1349         frame_create_tx(ep, ep->txframe);
1350         return 0;
1351 }
1352
1353 static int qe_ep0_txconf(struct qe_ep *ep)
1354 {
1355         struct qe_bd __iomem *bd;
1356         struct qe_frame *pframe;
1357         u32 bdstatus;
1358
1359         bd = ep->c_txbd;
1360         bdstatus = in_be32((u32 __iomem *)bd);
1361         while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1362                 pframe = ep->txframe;
1363
1364                 /* clear and recycle the BD */
1365                 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1366                 out_be32(&bd->buf, 0);
1367                 if (bdstatus & T_W)
1368                         ep->c_txbd = ep->txbase;
1369                 else
1370                         ep->c_txbd++;
1371
1372                 if (ep->c_txbd == ep->n_txbd) {
1373                         if (bdstatus & DEVICE_T_ERROR) {
1374                                 frame_set_status(pframe, FRAME_ERROR);
1375                                 if (bdstatus & T_TO)
1376                                         pframe->status |= TX_ER_TIMEOUT;
1377                                 if (bdstatus & T_UN)
1378                                         pframe->status |= TX_ER_UNDERUN;
1379                         }
1380                         ep0_txframe_handle(ep);
1381                 }
1382
1383                 bd = ep->c_txbd;
1384                 bdstatus = in_be32((u32 __iomem *)bd);
1385         }
1386
1387         return 0;
1388 }
1389
1390 static int ep_txframe_handle(struct qe_ep *ep)
1391 {
1392         if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1393                 qe_ep_flushtxfifo(ep);
1394                 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1395                 if (frame_get_info(ep->txframe) & PID_DATA0)
1396                         ep->data01 = 0;
1397                 else
1398                         ep->data01 = 1;
1399
1400                 txcomplete(ep, 1);
1401         } else
1402                 txcomplete(ep, 0);
1403
1404         frame_create_tx(ep, ep->txframe); /* send the data */
1405         return 0;
1406 }
1407
1408 /* confirm the already trainsmited bd */
1409 static int qe_ep_txconf(struct qe_ep *ep)
1410 {
1411         struct qe_bd __iomem *bd;
1412         struct qe_frame *pframe = NULL;
1413         u32 bdstatus;
1414         unsigned char breakonrxinterrupt = 0;
1415
1416         bd = ep->c_txbd;
1417         bdstatus = in_be32((u32 __iomem *)bd);
1418         while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1419                 pframe = ep->txframe;
1420                 if (bdstatus & DEVICE_T_ERROR) {
1421                         frame_set_status(pframe, FRAME_ERROR);
1422                         if (bdstatus & T_TO)
1423                                 pframe->status |= TX_ER_TIMEOUT;
1424                         if (bdstatus & T_UN)
1425                                 pframe->status |= TX_ER_UNDERUN;
1426                 }
1427
1428                 /* clear and recycle the BD */
1429                 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1430                 out_be32(&bd->buf, 0);
1431                 if (bdstatus & T_W)
1432                         ep->c_txbd = ep->txbase;
1433                 else
1434                         ep->c_txbd++;
1435
1436                 /* handle the tx frame */
1437                 ep_txframe_handle(ep);
1438                 bd = ep->c_txbd;
1439                 bdstatus = in_be32((u32 __iomem *)bd);
1440         }
1441         if (breakonrxinterrupt)
1442                 return -EIO;
1443         else
1444                 return 0;
1445 }
1446
1447 /* Add a request in queue, and try to transmit a packet */
1448 static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1449 {
1450         int reval = 0;
1451
1452         if (ep->tx_req == NULL) {
1453                 ep->sent = 0;
1454                 ep->last = 0;
1455                 txcomplete(ep, 0); /* can gain a new tx_req */
1456                 reval = frame_create_tx(ep, ep->txframe);
1457         }
1458         return reval;
1459 }
1460
1461 /* Maybe this is a good ideal */
1462 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1463 {
1464         struct qe_udc *udc = ep->udc;
1465         struct qe_frame *pframe = NULL;
1466         struct qe_bd __iomem *bd;
1467         u32 bdstatus, length;
1468         u32 vaddr, fsize;
1469         u8 *cp;
1470         u8 finish_req = 0;
1471         u8 framepid;
1472
1473         if (list_empty(&ep->queue)) {
1474                 dev_vdbg(udc->dev, "the req already finish!\n");
1475                 return 0;
1476         }
1477         pframe = ep->rxframe;
1478
1479         bd = ep->n_rxbd;
1480         bdstatus = in_be32((u32 __iomem *)bd);
1481         length = bdstatus & BD_LENGTH_MASK;
1482
1483         while (!(bdstatus & R_E) && length) {
1484                 if (finish_req)
1485                         break;
1486                 if ((bdstatus & R_F) && (bdstatus & R_L)
1487                                         && !(bdstatus & R_ERROR)) {
1488                         qe_frame_clean(pframe);
1489                         vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1490                         frame_set_data(pframe, (u8 *)vaddr);
1491                         frame_set_length(pframe, (length - USB_CRC_SIZE));
1492                         frame_set_status(pframe, FRAME_OK);
1493                         switch (bdstatus & R_PID) {
1494                         case R_PID_DATA1:
1495                                 frame_set_info(pframe, PID_DATA1); break;
1496                         default:
1497                                 frame_set_info(pframe, PID_DATA0); break;
1498                         }
1499                         /* handle the rx frame */
1500
1501                         if (frame_get_info(pframe) & PID_DATA1)
1502                                 framepid = 0x1;
1503                         else
1504                                 framepid = 0;
1505
1506                         if (framepid != ep->data01) {
1507                                 dev_vdbg(udc->dev, "the data01 error!\n");
1508                         } else {
1509                                 fsize = frame_get_length(pframe);
1510
1511                                 cp = (u8 *)(req->req.buf) + req->req.actual;
1512                                 if (cp) {
1513                                         memcpy(cp, pframe->data, fsize);
1514                                         req->req.actual += fsize;
1515                                         if ((fsize < ep->ep.maxpacket)
1516                                                 || (req->req.actual >=
1517                                                         req->req.length)) {
1518                                                 finish_req = 1;
1519                                                 done(ep, req, 0);
1520                                                 if (list_empty(&ep->queue))
1521                                                         qe_eprx_nack(ep);
1522                                         }
1523                                 }
1524                                 qe_ep_toggledata01(ep);
1525                         }
1526                 } else {
1527                         dev_err(udc->dev, "The receive frame with error!\n");
1528                 }
1529
1530                 /* note: don't clear the rxbd's buffer address *
1531                  * only Clear the length */
1532                 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1533                 ep->has_data--;
1534
1535                 /* Get next BD */
1536                 if (bdstatus & R_W)
1537                         bd = ep->rxbase;
1538                 else
1539                         bd++;
1540
1541                 bdstatus = in_be32((u32 __iomem *)bd);
1542                 length = bdstatus & BD_LENGTH_MASK;
1543         }
1544
1545         ep->n_rxbd = bd;
1546         ep_recycle_rxbds(ep);
1547
1548         return 0;
1549 }
1550
1551 /* only add the request in queue */
1552 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1553 {
1554         if (ep->state == EP_STATE_NACK) {
1555                 if (ep->has_data <= 0) {
1556                         /* Enable rx and unmask rx interrupt */
1557                         qe_eprx_normal(ep);
1558                 } else {
1559                         /* Copy the exist BD data */
1560                         ep_req_rx(ep, req);
1561                 }
1562         }
1563
1564         return 0;
1565 }
1566
1567 /********************************************************************
1568         Internal Used Function End
1569 ********************************************************************/
1570
1571 /*-----------------------------------------------------------------------
1572         Endpoint Management Functions For Gadget
1573  -----------------------------------------------------------------------*/
1574 static int qe_ep_enable(struct usb_ep *_ep,
1575                          const struct usb_endpoint_descriptor *desc)
1576 {
1577         struct qe_udc *udc;
1578         struct qe_ep *ep;
1579         int retval = 0;
1580         unsigned char epnum;
1581
1582         ep = container_of(_ep, struct qe_ep, ep);
1583
1584         /* catch various bogus parameters */
1585         if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
1586                         (desc->bDescriptorType != USB_DT_ENDPOINT))
1587                 return -EINVAL;
1588
1589         udc = ep->udc;
1590         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1591                 return -ESHUTDOWN;
1592
1593         epnum = (u8)desc->bEndpointAddress & 0xF;
1594
1595         retval = qe_ep_init(udc, epnum, desc);
1596         if (retval != 0) {
1597                 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1598                 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1599                 return -EINVAL;
1600         }
1601         dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1602         return 0;
1603 }
1604
1605 static int qe_ep_disable(struct usb_ep *_ep)
1606 {
1607         struct qe_udc *udc;
1608         struct qe_ep *ep;
1609         unsigned long flags;
1610         unsigned int size;
1611
1612         ep = container_of(_ep, struct qe_ep, ep);
1613         udc = ep->udc;
1614
1615         if (!_ep || !ep->desc) {
1616                 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1617                 return -EINVAL;
1618         }
1619
1620         spin_lock_irqsave(&udc->lock, flags);
1621         /* Nuke all pending requests (does flush) */
1622         nuke(ep, -ESHUTDOWN);
1623         ep->desc = NULL;
1624         ep->stopped = 1;
1625         spin_unlock_irqrestore(&udc->lock, flags);
1626
1627         cpm_muram_free(cpm_muram_offset(ep->rxbase));
1628
1629         if (ep->dir == USB_DIR_OUT)
1630                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1631                                 (USB_BDRING_LEN_RX + 1);
1632         else
1633                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1634                                 (USB_BDRING_LEN + 1);
1635
1636         if (ep->dir != USB_DIR_IN) {
1637                 kfree(ep->rxframe);
1638                 if (ep->rxbufmap) {
1639                         dma_unmap_single(udc_controller->gadget.dev.parent,
1640                                         ep->rxbuf_d, size,
1641                                         DMA_FROM_DEVICE);
1642                         ep->rxbuf_d = DMA_ADDR_INVALID;
1643                 } else {
1644                         dma_sync_single_for_cpu(
1645                                         udc_controller->gadget.dev.parent,
1646                                         ep->rxbuf_d, size,
1647                                         DMA_FROM_DEVICE);
1648                 }
1649                 kfree(ep->rxbuffer);
1650         }
1651
1652         if (ep->dir != USB_DIR_OUT)
1653                 kfree(ep->txframe);
1654
1655         dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1656         return 0;
1657 }
1658
1659 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1660 {
1661         struct qe_req *req;
1662
1663         req = kzalloc(sizeof(*req), gfp_flags);
1664         if (!req)
1665                 return NULL;
1666
1667         req->req.dma = DMA_ADDR_INVALID;
1668
1669         INIT_LIST_HEAD(&req->queue);
1670
1671         return &req->req;
1672 }
1673
1674 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1675 {
1676         struct qe_req *req;
1677
1678         req = container_of(_req, struct qe_req, req);
1679
1680         if (_req)
1681                 kfree(req);
1682 }
1683
1684 /* queues (submits) an I/O request to an endpoint */
1685 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1686                                 gfp_t gfp_flags)
1687 {
1688         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1689         struct qe_req *req = container_of(_req, struct qe_req, req);
1690         struct qe_udc *udc;
1691         unsigned long flags;
1692         int reval;
1693
1694         udc = ep->udc;
1695         /* catch various bogus parameters */
1696         if (!_req || !req->req.complete || !req->req.buf
1697                         || !list_empty(&req->queue)) {
1698                 dev_dbg(udc->dev, "bad params\n");
1699                 return -EINVAL;
1700         }
1701         if (!_ep || (!ep->desc && ep_index(ep))) {
1702                 dev_dbg(udc->dev, "bad ep\n");
1703                 return -EINVAL;
1704         }
1705
1706         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1707                 return -ESHUTDOWN;
1708
1709         req->ep = ep;
1710
1711         /* map virtual address to hardware */
1712         if (req->req.dma == DMA_ADDR_INVALID) {
1713                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1714                                         req->req.buf,
1715                                         req->req.length,
1716                                         ep_is_in(ep)
1717                                         ? DMA_TO_DEVICE :
1718                                         DMA_FROM_DEVICE);
1719                 req->mapped = 1;
1720         } else {
1721                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1722                                         req->req.dma, req->req.length,
1723                                         ep_is_in(ep)
1724                                         ? DMA_TO_DEVICE :
1725                                         DMA_FROM_DEVICE);
1726                 req->mapped = 0;
1727         }
1728
1729         req->req.status = -EINPROGRESS;
1730         req->req.actual = 0;
1731
1732         list_add_tail(&req->queue, &ep->queue);
1733         dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1734                         ep->name, req->req.length);
1735         spin_lock_irqsave(&udc->lock, flags);
1736         /* push the request to device */
1737         if (ep_is_in(ep))
1738                 reval = ep_req_send(ep, req);
1739
1740         /* EP0 */
1741         if (ep_index(ep) == 0 && req->req.length > 0) {
1742                 if (ep_is_in(ep))
1743                         udc->ep0_state = DATA_STATE_XMIT;
1744                 else
1745                         udc->ep0_state = DATA_STATE_RECV;
1746         }
1747
1748         if (ep->dir == USB_DIR_OUT)
1749                 reval = ep_req_receive(ep, req);
1750
1751         spin_unlock_irqrestore(&udc->lock, flags);
1752
1753         return 0;
1754 }
1755
1756 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1757 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1758 {
1759         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1760         struct qe_req *req;
1761         unsigned long flags;
1762
1763         if (!_ep || !_req)
1764                 return -EINVAL;
1765
1766         spin_lock_irqsave(&ep->udc->lock, flags);
1767
1768         /* make sure it's actually queued on this endpoint */
1769         list_for_each_entry(req, &ep->queue, queue) {
1770                 if (&req->req == _req)
1771                         break;
1772         }
1773
1774         if (&req->req != _req) {
1775                 spin_unlock_irqrestore(&ep->udc->lock, flags);
1776                 return -EINVAL;
1777         }
1778
1779         done(ep, req, -ECONNRESET);
1780
1781         spin_unlock_irqrestore(&ep->udc->lock, flags);
1782         return 0;
1783 }
1784
1785 /*-----------------------------------------------------------------
1786  * modify the endpoint halt feature
1787  * @ep: the non-isochronous endpoint being stalled
1788  * @value: 1--set halt  0--clear halt
1789  * Returns zero, or a negative error code.
1790 *----------------------------------------------------------------*/
1791 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1792 {
1793         struct qe_ep *ep;
1794         unsigned long flags;
1795         int status = -EOPNOTSUPP;
1796         struct qe_udc *udc;
1797
1798         ep = container_of(_ep, struct qe_ep, ep);
1799         if (!_ep || !ep->desc) {
1800                 status = -EINVAL;
1801                 goto out;
1802         }
1803
1804         udc = ep->udc;
1805         /* Attempt to halt IN ep will fail if any transfer requests
1806          * are still queue */
1807         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1808                 status = -EAGAIN;
1809                 goto out;
1810         }
1811
1812         status = 0;
1813         spin_lock_irqsave(&ep->udc->lock, flags);
1814         qe_eptx_stall_change(ep, value);
1815         qe_eprx_stall_change(ep, value);
1816         spin_unlock_irqrestore(&ep->udc->lock, flags);
1817
1818         if (ep->epnum == 0) {
1819                 udc->ep0_state = WAIT_FOR_SETUP;
1820                 udc->ep0_dir = 0;
1821         }
1822
1823         /* set data toggle to DATA0 on clear halt */
1824         if (value == 0)
1825                 ep->data01 = 0;
1826 out:
1827         dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1828                         value ?  "set" : "clear", status);
1829
1830         return status;
1831 }
1832
1833 static struct usb_ep_ops qe_ep_ops = {
1834         .enable = qe_ep_enable,
1835         .disable = qe_ep_disable,
1836
1837         .alloc_request = qe_alloc_request,
1838         .free_request = qe_free_request,
1839
1840         .queue = qe_ep_queue,
1841         .dequeue = qe_ep_dequeue,
1842
1843         .set_halt = qe_ep_set_halt,
1844 };
1845
1846 /*------------------------------------------------------------------------
1847         Gadget Driver Layer Operations
1848  ------------------------------------------------------------------------*/
1849
1850 /* Get the current frame number */
1851 static int qe_get_frame(struct usb_gadget *gadget)
1852 {
1853         u16 tmp;
1854
1855         tmp = in_be16(&udc_controller->usb_param->frame_n);
1856         if (tmp & 0x8000)
1857                 tmp = tmp & 0x07ff;
1858         else
1859                 tmp = -EINVAL;
1860
1861         return (int)tmp;
1862 }
1863
1864 /* Tries to wake up the host connected to this gadget
1865  *
1866  * Return : 0-success
1867  * Negative-this feature not enabled by host or not supported by device hw
1868  */
1869 static int qe_wakeup(struct usb_gadget *gadget)
1870 {
1871         return -ENOTSUPP;
1872 }
1873
1874 /* Notify controller that VBUS is powered, Called by whatever
1875    detects VBUS sessions */
1876 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1877 {
1878         return -ENOTSUPP;
1879 }
1880
1881 /* constrain controller's VBUS power usage
1882  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1883  * reporting how much power the device may consume.  For example, this
1884  * could affect how quickly batteries are recharged.
1885  *
1886  * Returns zero on success, else negative errno.
1887  */
1888 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1889 {
1890         return -ENOTSUPP;
1891 }
1892
1893 /* Change Data+ pullup status
1894  * this func is used by usb_gadget_connect/disconnect
1895  */
1896 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1897 {
1898         return -ENOTSUPP;
1899 }
1900
1901 /* defined in usb_gadget.h */
1902 static struct usb_gadget_ops qe_gadget_ops = {
1903         .get_frame = qe_get_frame,
1904         .wakeup = qe_wakeup,
1905 /*      .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1906         .vbus_session = qe_vbus_session,
1907         .vbus_draw = qe_vbus_draw,
1908         .pullup = qe_pullup,
1909 };
1910
1911 /*-------------------------------------------------------------------------
1912         USB ep0 Setup process in BUS Enumeration
1913  -------------------------------------------------------------------------*/
1914 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1915 {
1916         struct qe_ep *ep = &udc->eps[pipe];
1917
1918         nuke(ep, -ECONNRESET);
1919         ep->tx_req = NULL;
1920         return 0;
1921 }
1922
1923 static int reset_queues(struct qe_udc *udc)
1924 {
1925         u8 pipe;
1926
1927         for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1928                 udc_reset_ep_queue(udc, pipe);
1929
1930         /* report disconnect; the driver is already quiesced */
1931         spin_unlock(&udc->lock);
1932         udc->driver->disconnect(&udc->gadget);
1933         spin_lock(&udc->lock);
1934
1935         return 0;
1936 }
1937
1938 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1939                         u16 length)
1940 {
1941         /* Save the new address to device struct */
1942         udc->device_address = (u8) value;
1943         /* Update usb state */
1944         udc->usb_state = USB_STATE_ADDRESS;
1945
1946         /* Status phase , send a ZLP */
1947         if (ep0_prime_status(udc, USB_DIR_IN))
1948                 qe_ep0_stall(udc);
1949 }
1950
1951 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1952 {
1953         struct qe_req *req = container_of(_req, struct qe_req, req);
1954
1955         req->req.buf = NULL;
1956         kfree(req);
1957 }
1958
1959 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1960                         u16 index, u16 length)
1961 {
1962         u16 usb_status = 0;
1963         struct qe_req *req;
1964         struct qe_ep *ep;
1965         int status = 0;
1966
1967         ep = &udc->eps[0];
1968         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1969                 /* Get device status */
1970                 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1971         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1972                 /* Get interface status */
1973                 /* We don't have interface information in udc driver */
1974                 usb_status = 0;
1975         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1976                 /* Get endpoint status */
1977                 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1978                 struct qe_ep *target_ep = &udc->eps[pipe];
1979                 u16 usep;
1980
1981                 /* stall if endpoint doesn't exist */
1982                 if (!target_ep->desc)
1983                         goto stall;
1984
1985                 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1986                 if (index & USB_DIR_IN) {
1987                         if (target_ep->dir != USB_DIR_IN)
1988                                 goto stall;
1989                         if ((usep & USB_THS_MASK) == USB_THS_STALL)
1990                                 usb_status = 1 << USB_ENDPOINT_HALT;
1991                 } else {
1992                         if (target_ep->dir != USB_DIR_OUT)
1993                                 goto stall;
1994                         if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
1995                                 usb_status = 1 << USB_ENDPOINT_HALT;
1996                 }
1997         }
1998
1999         req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
2000                                         struct qe_req, req);
2001         req->req.length = 2;
2002         req->req.buf = udc->statusbuf;
2003         *(u16 *)req->req.buf = cpu_to_le16(usb_status);
2004         req->req.status = -EINPROGRESS;
2005         req->req.actual = 0;
2006         req->req.complete = ownercomplete;
2007
2008         udc->ep0_dir = USB_DIR_IN;
2009
2010         /* data phase */
2011         status = qe_ep_queue(&ep->ep, &req->req, GFP_ATOMIC);
2012
2013         if (status == 0)
2014                 return;
2015 stall:
2016         dev_err(udc->dev, "Can't respond to getstatus request \n");
2017         qe_ep0_stall(udc);
2018 }
2019
2020 /* only handle the setup request, suppose the device in normal status */
2021 static void setup_received_handle(struct qe_udc *udc,
2022                                 struct usb_ctrlrequest *setup)
2023 {
2024         /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2025         u16 wValue = le16_to_cpu(setup->wValue);
2026         u16 wIndex = le16_to_cpu(setup->wIndex);
2027         u16 wLength = le16_to_cpu(setup->wLength);
2028
2029         /* clear the previous request in the ep0 */
2030         udc_reset_ep_queue(udc, 0);
2031
2032         if (setup->bRequestType & USB_DIR_IN)
2033                 udc->ep0_dir = USB_DIR_IN;
2034         else
2035                 udc->ep0_dir = USB_DIR_OUT;
2036
2037         switch (setup->bRequest) {
2038         case USB_REQ_GET_STATUS:
2039                 /* Data+Status phase form udc */
2040                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2041                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
2042                         break;
2043                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2044                                         wLength);
2045                 return;
2046
2047         case USB_REQ_SET_ADDRESS:
2048                 /* Status phase from udc */
2049                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2050                                                 USB_RECIP_DEVICE))
2051                         break;
2052                 ch9setaddress(udc, wValue, wIndex, wLength);
2053                 return;
2054
2055         case USB_REQ_CLEAR_FEATURE:
2056         case USB_REQ_SET_FEATURE:
2057                 /* Requests with no data phase, status phase from udc */
2058                 if ((setup->bRequestType & USB_TYPE_MASK)
2059                                         != USB_TYPE_STANDARD)
2060                         break;
2061
2062                 if ((setup->bRequestType & USB_RECIP_MASK)
2063                                 == USB_RECIP_ENDPOINT) {
2064                         int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2065                         struct qe_ep *ep;
2066
2067                         if (wValue != 0 || wLength != 0
2068                                 || pipe > USB_MAX_ENDPOINTS)
2069                                 break;
2070                         ep = &udc->eps[pipe];
2071
2072                         spin_unlock(&udc->lock);
2073                         qe_ep_set_halt(&ep->ep,
2074                                         (setup->bRequest == USB_REQ_SET_FEATURE)
2075                                                 ? 1 : 0);
2076                         spin_lock(&udc->lock);
2077                 }
2078
2079                 ep0_prime_status(udc, USB_DIR_IN);
2080
2081                 return;
2082
2083         default:
2084                 break;
2085         }
2086
2087         if (wLength) {
2088                 /* Data phase from gadget, status phase from udc */
2089                 if (setup->bRequestType & USB_DIR_IN) {
2090                         udc->ep0_state = DATA_STATE_XMIT;
2091                         udc->ep0_dir = USB_DIR_IN;
2092                 } else {
2093                         udc->ep0_state = DATA_STATE_RECV;
2094                         udc->ep0_dir = USB_DIR_OUT;
2095                 }
2096                 spin_unlock(&udc->lock);
2097                 if (udc->driver->setup(&udc->gadget,
2098                                         &udc->local_setup_buff) < 0)
2099                         qe_ep0_stall(udc);
2100                 spin_lock(&udc->lock);
2101         } else {
2102                 /* No data phase, IN status from gadget */
2103                 udc->ep0_dir = USB_DIR_IN;
2104                 spin_unlock(&udc->lock);
2105                 if (udc->driver->setup(&udc->gadget,
2106                                         &udc->local_setup_buff) < 0)
2107                         qe_ep0_stall(udc);
2108                 spin_lock(&udc->lock);
2109                 udc->ep0_state = DATA_STATE_NEED_ZLP;
2110         }
2111 }
2112
2113 /*-------------------------------------------------------------------------
2114         USB Interrupt handlers
2115  -------------------------------------------------------------------------*/
2116 static void suspend_irq(struct qe_udc *udc)
2117 {
2118         udc->resume_state = udc->usb_state;
2119         udc->usb_state = USB_STATE_SUSPENDED;
2120
2121         /* report suspend to the driver ,serial.c not support this*/
2122         if (udc->driver->suspend)
2123                 udc->driver->suspend(&udc->gadget);
2124 }
2125
2126 static void resume_irq(struct qe_udc *udc)
2127 {
2128         udc->usb_state = udc->resume_state;
2129         udc->resume_state = 0;
2130
2131         /* report resume to the driver , serial.c not support this*/
2132         if (udc->driver->resume)
2133                 udc->driver->resume(&udc->gadget);
2134 }
2135
2136 static void idle_irq(struct qe_udc *udc)
2137 {
2138         u8 usbs;
2139
2140         usbs = in_8(&udc->usb_regs->usb_usbs);
2141         if (usbs & USB_IDLE_STATUS_MASK) {
2142                 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2143                         suspend_irq(udc);
2144         } else {
2145                 if (udc->usb_state == USB_STATE_SUSPENDED)
2146                         resume_irq(udc);
2147         }
2148 }
2149
2150 static int reset_irq(struct qe_udc *udc)
2151 {
2152         unsigned char i;
2153
2154         qe_usb_disable();
2155         out_8(&udc->usb_regs->usb_usadr, 0);
2156
2157         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2158                 if (udc->eps[i].init)
2159                         qe_ep_reset(udc, i);
2160         }
2161
2162         reset_queues(udc);
2163         udc->usb_state = USB_STATE_DEFAULT;
2164         udc->ep0_state = WAIT_FOR_SETUP;
2165         udc->ep0_dir = USB_DIR_OUT;
2166         qe_usb_enable();
2167         return 0;
2168 }
2169
2170 static int bsy_irq(struct qe_udc *udc)
2171 {
2172         return 0;
2173 }
2174
2175 static int txe_irq(struct qe_udc *udc)
2176 {
2177         return 0;
2178 }
2179
2180 /* ep0 tx interrupt also in here */
2181 static int tx_irq(struct qe_udc *udc)
2182 {
2183         struct qe_ep *ep;
2184         struct qe_bd __iomem *bd;
2185         int i, res = 0;
2186
2187         if ((udc->usb_state == USB_STATE_ADDRESS)
2188                 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2189                 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2190
2191         for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2192                 ep = &udc->eps[i];
2193                 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2194                         bd = ep->c_txbd;
2195                         if (!(in_be32((u32 __iomem *)bd) & T_R)
2196                                                 && (in_be32(&bd->buf))) {
2197                                 /* confirm the transmitted bd */
2198                                 if (ep->epnum == 0)
2199                                         res = qe_ep0_txconf(ep);
2200                                 else
2201                                         res = qe_ep_txconf(ep);
2202                         }
2203                 }
2204         }
2205         return res;
2206 }
2207
2208
2209 /* setup packect's rx is handle in the function too */
2210 static void rx_irq(struct qe_udc *udc)
2211 {
2212         struct qe_ep *ep;
2213         struct qe_bd __iomem *bd;
2214         int i;
2215
2216         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2217                 ep = &udc->eps[i];
2218                 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2219                         bd = ep->n_rxbd;
2220                         if (!(in_be32((u32 __iomem *)bd) & R_E)
2221                                                 && (in_be32(&bd->buf))) {
2222                                 if (ep->epnum == 0) {
2223                                         qe_ep0_rx(udc);
2224                                 } else {
2225                                         /*non-setup package receive*/
2226                                         qe_ep_rx(ep);
2227                                 }
2228                         }
2229                 }
2230         }
2231 }
2232
2233 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2234 {
2235         struct qe_udc *udc = (struct qe_udc *)_udc;
2236         u16 irq_src;
2237         irqreturn_t status = IRQ_NONE;
2238         unsigned long flags;
2239
2240         spin_lock_irqsave(&udc->lock, flags);
2241
2242         irq_src = in_be16(&udc->usb_regs->usb_usber) &
2243                 in_be16(&udc->usb_regs->usb_usbmr);
2244         /* Clear notification bits */
2245         out_be16(&udc->usb_regs->usb_usber, irq_src);
2246         /* USB Interrupt */
2247         if (irq_src & USB_E_IDLE_MASK) {
2248                 idle_irq(udc);
2249                 irq_src &= ~USB_E_IDLE_MASK;
2250                 status = IRQ_HANDLED;
2251         }
2252
2253         if (irq_src & USB_E_TXB_MASK) {
2254                 tx_irq(udc);
2255                 irq_src &= ~USB_E_TXB_MASK;
2256                 status = IRQ_HANDLED;
2257         }
2258
2259         if (irq_src & USB_E_RXB_MASK) {
2260                 rx_irq(udc);
2261                 irq_src &= ~USB_E_RXB_MASK;
2262                 status = IRQ_HANDLED;
2263         }
2264
2265         if (irq_src & USB_E_RESET_MASK) {
2266                 reset_irq(udc);
2267                 irq_src &= ~USB_E_RESET_MASK;
2268                 status = IRQ_HANDLED;
2269         }
2270
2271         if (irq_src & USB_E_BSY_MASK) {
2272                 bsy_irq(udc);
2273                 irq_src &= ~USB_E_BSY_MASK;
2274                 status = IRQ_HANDLED;
2275         }
2276
2277         if (irq_src & USB_E_TXE_MASK) {
2278                 txe_irq(udc);
2279                 irq_src &= ~USB_E_TXE_MASK;
2280                 status = IRQ_HANDLED;
2281         }
2282
2283         spin_unlock_irqrestore(&udc->lock, flags);
2284
2285         return status;
2286 }
2287
2288 /*-------------------------------------------------------------------------
2289         Gadget driver register and unregister.
2290  --------------------------------------------------------------------------*/
2291 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2292 {
2293         int retval;
2294         unsigned long flags = 0;
2295
2296         /* standard operations */
2297         if (!udc_controller)
2298                 return -ENODEV;
2299
2300         if (!driver || (driver->speed != USB_SPEED_FULL
2301                         && driver->speed != USB_SPEED_HIGH)
2302                         || !driver->bind || !driver->disconnect
2303                         || !driver->setup)
2304                 return -EINVAL;
2305
2306         if (udc_controller->driver)
2307                 return -EBUSY;
2308
2309         /* lock is needed but whether should use this lock or another */
2310         spin_lock_irqsave(&udc_controller->lock, flags);
2311
2312         driver->driver.bus = NULL;
2313         /* hook up the driver */
2314         udc_controller->driver = driver;
2315         udc_controller->gadget.dev.driver = &driver->driver;
2316         udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2317         spin_unlock_irqrestore(&udc_controller->lock, flags);
2318
2319         retval = driver->bind(&udc_controller->gadget);
2320         if (retval) {
2321                 dev_err(udc_controller->dev, "bind to %s --> %d",
2322                                 driver->driver.name, retval);
2323                 udc_controller->gadget.dev.driver = NULL;
2324                 udc_controller->driver = NULL;
2325                 return retval;
2326         }
2327
2328         /* Enable IRQ reg and Set usbcmd reg EN bit */
2329         qe_usb_enable();
2330
2331         out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2332         out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2333         udc_controller->usb_state = USB_STATE_ATTACHED;
2334         udc_controller->ep0_state = WAIT_FOR_SETUP;
2335         udc_controller->ep0_dir = USB_DIR_OUT;
2336         dev_info(udc_controller->dev, "%s bind to driver %s \n",
2337                 udc_controller->gadget.name, driver->driver.name);
2338         return 0;
2339 }
2340 EXPORT_SYMBOL(usb_gadget_register_driver);
2341
2342 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2343 {
2344         struct qe_ep *loop_ep;
2345         unsigned long flags;
2346
2347         if (!udc_controller)
2348                 return -ENODEV;
2349
2350         if (!driver || driver != udc_controller->driver)
2351                 return -EINVAL;
2352
2353         /* stop usb controller, disable intr */
2354         qe_usb_disable();
2355
2356         /* in fact, no needed */
2357         udc_controller->usb_state = USB_STATE_ATTACHED;
2358         udc_controller->ep0_state = WAIT_FOR_SETUP;
2359         udc_controller->ep0_dir = 0;
2360
2361         /* stand operation */
2362         spin_lock_irqsave(&udc_controller->lock, flags);
2363         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2364         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2365         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2366                                 ep.ep_list)
2367                 nuke(loop_ep, -ESHUTDOWN);
2368         spin_unlock_irqrestore(&udc_controller->lock, flags);
2369
2370         /* report disconnect; the controller is already quiesced */
2371         driver->disconnect(&udc_controller->gadget);
2372
2373         /* unbind gadget and unhook driver. */
2374         driver->unbind(&udc_controller->gadget);
2375         udc_controller->gadget.dev.driver = NULL;
2376         udc_controller->driver = NULL;
2377
2378         dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2379                         driver->driver.name);
2380         return 0;
2381 }
2382 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2383
2384 /* udc structure's alloc and setup, include ep-param alloc */
2385 static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
2386 {
2387         struct qe_udc *udc;
2388         struct device_node *np = ofdev->node;
2389         unsigned int tmp_addr = 0;
2390         struct usb_device_para __iomem *usbpram;
2391         unsigned int i;
2392         u64 size;
2393         u32 offset;
2394
2395         udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2396         if (udc == NULL) {
2397                 dev_err(&ofdev->dev, "malloc udc failed\n");
2398                 goto cleanup;
2399         }
2400
2401         udc->dev = &ofdev->dev;
2402
2403         /* get default address of usb parameter in MURAM from device tree */
2404         offset = *of_get_address(np, 1, &size, NULL);
2405         udc->usb_param = cpm_muram_addr(offset);
2406         memset_io(udc->usb_param, 0, size);
2407
2408         usbpram = udc->usb_param;
2409         out_be16(&usbpram->frame_n, 0);
2410         out_be32(&usbpram->rstate, 0);
2411
2412         tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2413                                         sizeof(struct usb_ep_para)),
2414                                            USB_EP_PARA_ALIGNMENT);
2415         if (IS_ERR_VALUE(tmp_addr))
2416                 goto cleanup;
2417
2418         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2419                 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2420                 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2421                 tmp_addr += 32;
2422         }
2423
2424         memset_io(udc->ep_param[0], 0,
2425                         USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2426
2427         udc->resume_state = USB_STATE_NOTATTACHED;
2428         udc->usb_state = USB_STATE_POWERED;
2429         udc->ep0_dir = 0;
2430
2431         spin_lock_init(&udc->lock);
2432         return udc;
2433
2434 cleanup:
2435         kfree(udc);
2436         return NULL;
2437 }
2438
2439 /* USB Controller register init */
2440 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2441 {
2442         struct usb_ctlr __iomem *qe_usbregs;
2443         qe_usbregs = udc->usb_regs;
2444
2445         /* Init the usb register */
2446         out_8(&qe_usbregs->usb_usmod, 0x01);
2447         out_be16(&qe_usbregs->usb_usbmr, 0);
2448         out_8(&qe_usbregs->usb_uscom, 0);
2449         out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2450
2451         return 0;
2452 }
2453
2454 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2455 {
2456         struct qe_ep *ep = &udc->eps[pipe_num];
2457
2458         ep->udc = udc;
2459         strcpy(ep->name, ep_name[pipe_num]);
2460         ep->ep.name = ep_name[pipe_num];
2461
2462         ep->ep.ops = &qe_ep_ops;
2463         ep->stopped = 1;
2464         ep->ep.maxpacket = (unsigned short) ~0;
2465         ep->desc = NULL;
2466         ep->dir = 0xff;
2467         ep->epnum = (u8)pipe_num;
2468         ep->sent = 0;
2469         ep->last = 0;
2470         ep->init = 0;
2471         ep->rxframe = NULL;
2472         ep->txframe = NULL;
2473         ep->tx_req = NULL;
2474         ep->state = EP_STATE_IDLE;
2475         ep->has_data = 0;
2476
2477         /* the queue lists any req for this ep */
2478         INIT_LIST_HEAD(&ep->queue);
2479
2480         /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2481         if (pipe_num != 0)
2482                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2483
2484         ep->gadget = &udc->gadget;
2485
2486         return 0;
2487 }
2488
2489 /*-----------------------------------------------------------------------
2490  *      UDC device Driver operation functions                           *
2491  *----------------------------------------------------------------------*/
2492 static void qe_udc_release(struct device *dev)
2493 {
2494         int i = 0;
2495
2496         complete(udc_controller->done);
2497         cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2498         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2499                 udc_controller->ep_param[i] = NULL;
2500
2501         kfree(udc_controller);
2502         udc_controller = NULL;
2503 }
2504
2505 /* Driver probe functions */
2506 static int __devinit qe_udc_probe(struct of_device *ofdev,
2507                         const struct of_device_id *match)
2508 {
2509         struct device_node *np = ofdev->node;
2510         struct qe_ep *ep;
2511         unsigned int ret = 0;
2512         unsigned int i;
2513         const void *prop;
2514
2515         prop = of_get_property(np, "mode", NULL);
2516         if (!prop || strcmp(prop, "peripheral"))
2517                 return -ENODEV;
2518
2519         /* Initialize the udc structure including QH member and other member */
2520         udc_controller = qe_udc_config(ofdev);
2521         if (!udc_controller) {
2522                 dev_err(&ofdev->dev, "failed to initialize\n");
2523                 return -ENOMEM;
2524         }
2525
2526         udc_controller->soc_type = (unsigned long)match->data;
2527         udc_controller->usb_regs = of_iomap(np, 0);
2528         if (!udc_controller->usb_regs) {
2529                 ret = -ENOMEM;
2530                 goto err1;
2531         }
2532
2533         /* initialize usb hw reg except for regs for EP,
2534          * leave usbintr reg untouched*/
2535         qe_udc_reg_init(udc_controller);
2536
2537         /* here comes the stand operations for probe
2538          * set the qe_udc->gadget.xxx */
2539         udc_controller->gadget.ops = &qe_gadget_ops;
2540
2541         /* gadget.ep0 is a pointer */
2542         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2543
2544         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2545
2546         /* modify in register gadget process */
2547         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2548
2549         /* name: Identifies the controller hardware type. */
2550         udc_controller->gadget.name = driver_name;
2551
2552         device_initialize(&udc_controller->gadget.dev);
2553
2554         dev_set_name(&udc_controller->gadget.dev, "gadget");
2555
2556         udc_controller->gadget.dev.release = qe_udc_release;
2557         udc_controller->gadget.dev.parent = &ofdev->dev;
2558
2559         /* initialize qe_ep struct */
2560         for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2561                 /* because the ep type isn't decide here so
2562                  * qe_ep_init() should be called in ep_enable() */
2563
2564                 /* setup the qe_ep struct and link ep.ep.list
2565                  * into gadget.ep_list */
2566                 qe_ep_config(udc_controller, (unsigned char)i);
2567         }
2568
2569         /* ep0 initialization in here */
2570         ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2571         if (ret)
2572                 goto err2;
2573
2574         /* create a buf for ZLP send, need to remain zeroed */
2575         udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2576         if (udc_controller->nullbuf == NULL) {
2577                 dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
2578                 ret = -ENOMEM;
2579                 goto err3;
2580         }
2581
2582         /* buffer for data of get_status request */
2583         udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2584         if (udc_controller->statusbuf == NULL) {
2585                 ret = -ENOMEM;
2586                 goto err4;
2587         }
2588
2589         udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2590         if (udc_controller->nullp == DMA_ADDR_INVALID) {
2591                 udc_controller->nullp = dma_map_single(
2592                                         udc_controller->gadget.dev.parent,
2593                                         udc_controller->nullbuf,
2594                                         256,
2595                                         DMA_TO_DEVICE);
2596                 udc_controller->nullmap = 1;
2597         } else {
2598                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2599                                         udc_controller->nullp, 256,
2600                                         DMA_TO_DEVICE);
2601         }
2602
2603         tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2604                         (unsigned long)udc_controller);
2605         /* request irq and disable DR  */
2606         udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2607
2608         ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2609                                 driver_name, udc_controller);
2610         if (ret) {
2611                 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2612                         udc_controller->usb_irq, ret);
2613                 goto err5;
2614         }
2615
2616         ret = device_add(&udc_controller->gadget.dev);
2617         if (ret)
2618                 goto err6;
2619
2620         dev_info(udc_controller->dev,
2621                         "%s USB controller initialized as device\n",
2622                         (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2623         return 0;
2624
2625 err6:
2626         free_irq(udc_controller->usb_irq, udc_controller);
2627 err5:
2628         if (udc_controller->nullmap) {
2629                 dma_unmap_single(udc_controller->gadget.dev.parent,
2630                         udc_controller->nullp, 256,
2631                                 DMA_TO_DEVICE);
2632                         udc_controller->nullp = DMA_ADDR_INVALID;
2633         } else {
2634                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2635                         udc_controller->nullp, 256,
2636                                 DMA_TO_DEVICE);
2637         }
2638         kfree(udc_controller->statusbuf);
2639 err4:
2640         kfree(udc_controller->nullbuf);
2641 err3:
2642         ep = &udc_controller->eps[0];
2643         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2644         kfree(ep->rxframe);
2645         kfree(ep->rxbuffer);
2646         kfree(ep->txframe);
2647 err2:
2648         iounmap(udc_controller->usb_regs);
2649 err1:
2650         kfree(udc_controller);
2651
2652         return ret;
2653 }
2654
2655 #ifdef CONFIG_PM
2656 static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
2657 {
2658         return -ENOTSUPP;
2659 }
2660
2661 static int qe_udc_resume(struct of_device *dev)
2662 {
2663         return -ENOTSUPP;
2664 }
2665 #endif
2666
2667 static int __devexit qe_udc_remove(struct of_device *ofdev)
2668 {
2669         struct qe_ep *ep;
2670         unsigned int size;
2671
2672         DECLARE_COMPLETION(done);
2673
2674         if (!udc_controller)
2675                 return -ENODEV;
2676
2677         udc_controller->done = &done;
2678         tasklet_disable(&udc_controller->rx_tasklet);
2679
2680         if (udc_controller->nullmap) {
2681                 dma_unmap_single(udc_controller->gadget.dev.parent,
2682                         udc_controller->nullp, 256,
2683                                 DMA_TO_DEVICE);
2684                         udc_controller->nullp = DMA_ADDR_INVALID;
2685         } else {
2686                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2687                         udc_controller->nullp, 256,
2688                                 DMA_TO_DEVICE);
2689         }
2690         kfree(udc_controller->statusbuf);
2691         kfree(udc_controller->nullbuf);
2692
2693         ep = &udc_controller->eps[0];
2694         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2695         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2696
2697         kfree(ep->rxframe);
2698         if (ep->rxbufmap) {
2699                 dma_unmap_single(udc_controller->gadget.dev.parent,
2700                                 ep->rxbuf_d, size,
2701                                 DMA_FROM_DEVICE);
2702                 ep->rxbuf_d = DMA_ADDR_INVALID;
2703         } else {
2704                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2705                                 ep->rxbuf_d, size,
2706                                 DMA_FROM_DEVICE);
2707         }
2708
2709         kfree(ep->rxbuffer);
2710         kfree(ep->txframe);
2711
2712         free_irq(udc_controller->usb_irq, udc_controller);
2713
2714         tasklet_kill(&udc_controller->rx_tasklet);
2715
2716         iounmap(udc_controller->usb_regs);
2717
2718         device_unregister(&udc_controller->gadget.dev);
2719         /* wait for release() of gadget.dev to free udc */
2720         wait_for_completion(&done);
2721
2722         return 0;
2723 }
2724
2725 /*-------------------------------------------------------------------------*/
2726 static struct of_device_id __devinitdata qe_udc_match[] = {
2727         {
2728                 .compatible = "fsl,mpc8360-qe-usb",
2729                 .data = (void *)PORT_QE,
2730         },
2731         {
2732                 .compatible = "fsl,mpc8272-cpm-usb",
2733                 .data = (void *)PORT_CPM,
2734         },
2735         {},
2736 };
2737
2738 MODULE_DEVICE_TABLE(of, qe_udc_match);
2739
2740 static struct of_platform_driver udc_driver = {
2741         .name           = (char *)driver_name,
2742         .match_table    = qe_udc_match,
2743         .probe          = qe_udc_probe,
2744         .remove         = __devexit_p(qe_udc_remove),
2745 #ifdef CONFIG_PM
2746         .suspend        = qe_udc_suspend,
2747         .resume         = qe_udc_resume,
2748 #endif
2749 };
2750
2751 static int __init qe_udc_init(void)
2752 {
2753         printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2754                         DRIVER_VERSION);
2755         return of_register_platform_driver(&udc_driver);
2756 }
2757
2758 static void __exit qe_udc_exit(void)
2759 {
2760         of_unregister_platform_driver(&udc_driver);
2761 }
2762
2763 module_init(qe_udc_init);
2764 module_exit(qe_udc_exit);
2765
2766 MODULE_DESCRIPTION(DRIVER_DESC);
2767 MODULE_AUTHOR(DRIVER_AUTHOR);
2768 MODULE_LICENSE("GPL");
2769