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         ep->tx_req = NULL;
1626         qe_ep_reset(udc, ep->epnum);
1627         spin_unlock_irqrestore(&udc->lock, flags);
1628
1629         cpm_muram_free(cpm_muram_offset(ep->rxbase));
1630
1631         if (ep->dir == USB_DIR_OUT)
1632                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1633                                 (USB_BDRING_LEN_RX + 1);
1634         else
1635                 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1636                                 (USB_BDRING_LEN + 1);
1637
1638         if (ep->dir != USB_DIR_IN) {
1639                 kfree(ep->rxframe);
1640                 if (ep->rxbufmap) {
1641                         dma_unmap_single(udc_controller->gadget.dev.parent,
1642                                         ep->rxbuf_d, size,
1643                                         DMA_FROM_DEVICE);
1644                         ep->rxbuf_d = DMA_ADDR_INVALID;
1645                 } else {
1646                         dma_sync_single_for_cpu(
1647                                         udc_controller->gadget.dev.parent,
1648                                         ep->rxbuf_d, size,
1649                                         DMA_FROM_DEVICE);
1650                 }
1651                 kfree(ep->rxbuffer);
1652         }
1653
1654         if (ep->dir != USB_DIR_OUT)
1655                 kfree(ep->txframe);
1656
1657         dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1658         return 0;
1659 }
1660
1661 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1662 {
1663         struct qe_req *req;
1664
1665         req = kzalloc(sizeof(*req), gfp_flags);
1666         if (!req)
1667                 return NULL;
1668
1669         req->req.dma = DMA_ADDR_INVALID;
1670
1671         INIT_LIST_HEAD(&req->queue);
1672
1673         return &req->req;
1674 }
1675
1676 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1677 {
1678         struct qe_req *req;
1679
1680         req = container_of(_req, struct qe_req, req);
1681
1682         if (_req)
1683                 kfree(req);
1684 }
1685
1686 static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
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         int reval;
1692
1693         udc = ep->udc;
1694         /* catch various bogus parameters */
1695         if (!_req || !req->req.complete || !req->req.buf
1696                         || !list_empty(&req->queue)) {
1697                 dev_dbg(udc->dev, "bad params\n");
1698                 return -EINVAL;
1699         }
1700         if (!_ep || (!ep->desc && ep_index(ep))) {
1701                 dev_dbg(udc->dev, "bad ep\n");
1702                 return -EINVAL;
1703         }
1704
1705         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1706                 return -ESHUTDOWN;
1707
1708         req->ep = ep;
1709
1710         /* map virtual address to hardware */
1711         if (req->req.dma == DMA_ADDR_INVALID) {
1712                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1713                                         req->req.buf,
1714                                         req->req.length,
1715                                         ep_is_in(ep)
1716                                         ? DMA_TO_DEVICE :
1717                                         DMA_FROM_DEVICE);
1718                 req->mapped = 1;
1719         } else {
1720                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1721                                         req->req.dma, req->req.length,
1722                                         ep_is_in(ep)
1723                                         ? DMA_TO_DEVICE :
1724                                         DMA_FROM_DEVICE);
1725                 req->mapped = 0;
1726         }
1727
1728         req->req.status = -EINPROGRESS;
1729         req->req.actual = 0;
1730
1731         list_add_tail(&req->queue, &ep->queue);
1732         dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1733                         ep->name, req->req.length);
1734
1735         /* push the request to device */
1736         if (ep_is_in(ep))
1737                 reval = ep_req_send(ep, req);
1738
1739         /* EP0 */
1740         if (ep_index(ep) == 0 && req->req.length > 0) {
1741                 if (ep_is_in(ep))
1742                         udc->ep0_state = DATA_STATE_XMIT;
1743                 else
1744                         udc->ep0_state = DATA_STATE_RECV;
1745         }
1746
1747         if (ep->dir == USB_DIR_OUT)
1748                 reval = ep_req_receive(ep, req);
1749
1750         return 0;
1751 }
1752
1753 /* queues (submits) an I/O request to an endpoint */
1754 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1755                        gfp_t gfp_flags)
1756 {
1757         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1758         struct qe_udc *udc = ep->udc;
1759         unsigned long flags;
1760         int ret;
1761
1762         spin_lock_irqsave(&udc->lock, flags);
1763         ret = __qe_ep_queue(_ep, _req);
1764         spin_unlock_irqrestore(&udc->lock, flags);
1765         return ret;
1766 }
1767
1768 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1769 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1770 {
1771         struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1772         struct qe_req *req;
1773         unsigned long flags;
1774
1775         if (!_ep || !_req)
1776                 return -EINVAL;
1777
1778         spin_lock_irqsave(&ep->udc->lock, flags);
1779
1780         /* make sure it's actually queued on this endpoint */
1781         list_for_each_entry(req, &ep->queue, queue) {
1782                 if (&req->req == _req)
1783                         break;
1784         }
1785
1786         if (&req->req != _req) {
1787                 spin_unlock_irqrestore(&ep->udc->lock, flags);
1788                 return -EINVAL;
1789         }
1790
1791         done(ep, req, -ECONNRESET);
1792
1793         spin_unlock_irqrestore(&ep->udc->lock, flags);
1794         return 0;
1795 }
1796
1797 /*-----------------------------------------------------------------
1798  * modify the endpoint halt feature
1799  * @ep: the non-isochronous endpoint being stalled
1800  * @value: 1--set halt  0--clear halt
1801  * Returns zero, or a negative error code.
1802 *----------------------------------------------------------------*/
1803 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1804 {
1805         struct qe_ep *ep;
1806         unsigned long flags;
1807         int status = -EOPNOTSUPP;
1808         struct qe_udc *udc;
1809
1810         ep = container_of(_ep, struct qe_ep, ep);
1811         if (!_ep || !ep->desc) {
1812                 status = -EINVAL;
1813                 goto out;
1814         }
1815
1816         udc = ep->udc;
1817         /* Attempt to halt IN ep will fail if any transfer requests
1818          * are still queue */
1819         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1820                 status = -EAGAIN;
1821                 goto out;
1822         }
1823
1824         status = 0;
1825         spin_lock_irqsave(&ep->udc->lock, flags);
1826         qe_eptx_stall_change(ep, value);
1827         qe_eprx_stall_change(ep, value);
1828         spin_unlock_irqrestore(&ep->udc->lock, flags);
1829
1830         if (ep->epnum == 0) {
1831                 udc->ep0_state = WAIT_FOR_SETUP;
1832                 udc->ep0_dir = 0;
1833         }
1834
1835         /* set data toggle to DATA0 on clear halt */
1836         if (value == 0)
1837                 ep->data01 = 0;
1838 out:
1839         dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1840                         value ?  "set" : "clear", status);
1841
1842         return status;
1843 }
1844
1845 static struct usb_ep_ops qe_ep_ops = {
1846         .enable = qe_ep_enable,
1847         .disable = qe_ep_disable,
1848
1849         .alloc_request = qe_alloc_request,
1850         .free_request = qe_free_request,
1851
1852         .queue = qe_ep_queue,
1853         .dequeue = qe_ep_dequeue,
1854
1855         .set_halt = qe_ep_set_halt,
1856 };
1857
1858 /*------------------------------------------------------------------------
1859         Gadget Driver Layer Operations
1860  ------------------------------------------------------------------------*/
1861
1862 /* Get the current frame number */
1863 static int qe_get_frame(struct usb_gadget *gadget)
1864 {
1865         u16 tmp;
1866
1867         tmp = in_be16(&udc_controller->usb_param->frame_n);
1868         if (tmp & 0x8000)
1869                 tmp = tmp & 0x07ff;
1870         else
1871                 tmp = -EINVAL;
1872
1873         return (int)tmp;
1874 }
1875
1876 /* Tries to wake up the host connected to this gadget
1877  *
1878  * Return : 0-success
1879  * Negative-this feature not enabled by host or not supported by device hw
1880  */
1881 static int qe_wakeup(struct usb_gadget *gadget)
1882 {
1883         return -ENOTSUPP;
1884 }
1885
1886 /* Notify controller that VBUS is powered, Called by whatever
1887    detects VBUS sessions */
1888 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1889 {
1890         return -ENOTSUPP;
1891 }
1892
1893 /* constrain controller's VBUS power usage
1894  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1895  * reporting how much power the device may consume.  For example, this
1896  * could affect how quickly batteries are recharged.
1897  *
1898  * Returns zero on success, else negative errno.
1899  */
1900 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1901 {
1902         return -ENOTSUPP;
1903 }
1904
1905 /* Change Data+ pullup status
1906  * this func is used by usb_gadget_connect/disconnect
1907  */
1908 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1909 {
1910         return -ENOTSUPP;
1911 }
1912
1913 /* defined in usb_gadget.h */
1914 static struct usb_gadget_ops qe_gadget_ops = {
1915         .get_frame = qe_get_frame,
1916         .wakeup = qe_wakeup,
1917 /*      .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1918         .vbus_session = qe_vbus_session,
1919         .vbus_draw = qe_vbus_draw,
1920         .pullup = qe_pullup,
1921 };
1922
1923 /*-------------------------------------------------------------------------
1924         USB ep0 Setup process in BUS Enumeration
1925  -------------------------------------------------------------------------*/
1926 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1927 {
1928         struct qe_ep *ep = &udc->eps[pipe];
1929
1930         nuke(ep, -ECONNRESET);
1931         ep->tx_req = NULL;
1932         return 0;
1933 }
1934
1935 static int reset_queues(struct qe_udc *udc)
1936 {
1937         u8 pipe;
1938
1939         for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1940                 udc_reset_ep_queue(udc, pipe);
1941
1942         /* report disconnect; the driver is already quiesced */
1943         spin_unlock(&udc->lock);
1944         udc->driver->disconnect(&udc->gadget);
1945         spin_lock(&udc->lock);
1946
1947         return 0;
1948 }
1949
1950 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1951                         u16 length)
1952 {
1953         /* Save the new address to device struct */
1954         udc->device_address = (u8) value;
1955         /* Update usb state */
1956         udc->usb_state = USB_STATE_ADDRESS;
1957
1958         /* Status phase , send a ZLP */
1959         if (ep0_prime_status(udc, USB_DIR_IN))
1960                 qe_ep0_stall(udc);
1961 }
1962
1963 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1964 {
1965         struct qe_req *req = container_of(_req, struct qe_req, req);
1966
1967         req->req.buf = NULL;
1968         kfree(req);
1969 }
1970
1971 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1972                         u16 index, u16 length)
1973 {
1974         u16 usb_status = 0;
1975         struct qe_req *req;
1976         struct qe_ep *ep;
1977         int status = 0;
1978
1979         ep = &udc->eps[0];
1980         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1981                 /* Get device status */
1982                 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1983         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1984                 /* Get interface status */
1985                 /* We don't have interface information in udc driver */
1986                 usb_status = 0;
1987         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1988                 /* Get endpoint status */
1989                 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1990                 struct qe_ep *target_ep = &udc->eps[pipe];
1991                 u16 usep;
1992
1993                 /* stall if endpoint doesn't exist */
1994                 if (!target_ep->desc)
1995                         goto stall;
1996
1997                 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1998                 if (index & USB_DIR_IN) {
1999                         if (target_ep->dir != USB_DIR_IN)
2000                                 goto stall;
2001                         if ((usep & USB_THS_MASK) == USB_THS_STALL)
2002                                 usb_status = 1 << USB_ENDPOINT_HALT;
2003                 } else {
2004                         if (target_ep->dir != USB_DIR_OUT)
2005                                 goto stall;
2006                         if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
2007                                 usb_status = 1 << USB_ENDPOINT_HALT;
2008                 }
2009         }
2010
2011         req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
2012                                         struct qe_req, req);
2013         req->req.length = 2;
2014         req->req.buf = udc->statusbuf;
2015         *(u16 *)req->req.buf = cpu_to_le16(usb_status);
2016         req->req.status = -EINPROGRESS;
2017         req->req.actual = 0;
2018         req->req.complete = ownercomplete;
2019
2020         udc->ep0_dir = USB_DIR_IN;
2021
2022         /* data phase */
2023         status = __qe_ep_queue(&ep->ep, &req->req);
2024
2025         if (status == 0)
2026                 return;
2027 stall:
2028         dev_err(udc->dev, "Can't respond to getstatus request \n");
2029         qe_ep0_stall(udc);
2030 }
2031
2032 /* only handle the setup request, suppose the device in normal status */
2033 static void setup_received_handle(struct qe_udc *udc,
2034                                 struct usb_ctrlrequest *setup)
2035 {
2036         /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2037         u16 wValue = le16_to_cpu(setup->wValue);
2038         u16 wIndex = le16_to_cpu(setup->wIndex);
2039         u16 wLength = le16_to_cpu(setup->wLength);
2040
2041         /* clear the previous request in the ep0 */
2042         udc_reset_ep_queue(udc, 0);
2043
2044         if (setup->bRequestType & USB_DIR_IN)
2045                 udc->ep0_dir = USB_DIR_IN;
2046         else
2047                 udc->ep0_dir = USB_DIR_OUT;
2048
2049         switch (setup->bRequest) {
2050         case USB_REQ_GET_STATUS:
2051                 /* Data+Status phase form udc */
2052                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2053                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
2054                         break;
2055                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2056                                         wLength);
2057                 return;
2058
2059         case USB_REQ_SET_ADDRESS:
2060                 /* Status phase from udc */
2061                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2062                                                 USB_RECIP_DEVICE))
2063                         break;
2064                 ch9setaddress(udc, wValue, wIndex, wLength);
2065                 return;
2066
2067         case USB_REQ_CLEAR_FEATURE:
2068         case USB_REQ_SET_FEATURE:
2069                 /* Requests with no data phase, status phase from udc */
2070                 if ((setup->bRequestType & USB_TYPE_MASK)
2071                                         != USB_TYPE_STANDARD)
2072                         break;
2073
2074                 if ((setup->bRequestType & USB_RECIP_MASK)
2075                                 == USB_RECIP_ENDPOINT) {
2076                         int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2077                         struct qe_ep *ep;
2078
2079                         if (wValue != 0 || wLength != 0
2080                                 || pipe > USB_MAX_ENDPOINTS)
2081                                 break;
2082                         ep = &udc->eps[pipe];
2083
2084                         spin_unlock(&udc->lock);
2085                         qe_ep_set_halt(&ep->ep,
2086                                         (setup->bRequest == USB_REQ_SET_FEATURE)
2087                                                 ? 1 : 0);
2088                         spin_lock(&udc->lock);
2089                 }
2090
2091                 ep0_prime_status(udc, USB_DIR_IN);
2092
2093                 return;
2094
2095         default:
2096                 break;
2097         }
2098
2099         if (wLength) {
2100                 /* Data phase from gadget, status phase from udc */
2101                 if (setup->bRequestType & USB_DIR_IN) {
2102                         udc->ep0_state = DATA_STATE_XMIT;
2103                         udc->ep0_dir = USB_DIR_IN;
2104                 } else {
2105                         udc->ep0_state = DATA_STATE_RECV;
2106                         udc->ep0_dir = USB_DIR_OUT;
2107                 }
2108                 spin_unlock(&udc->lock);
2109                 if (udc->driver->setup(&udc->gadget,
2110                                         &udc->local_setup_buff) < 0)
2111                         qe_ep0_stall(udc);
2112                 spin_lock(&udc->lock);
2113         } else {
2114                 /* No data phase, IN status from gadget */
2115                 udc->ep0_dir = USB_DIR_IN;
2116                 spin_unlock(&udc->lock);
2117                 if (udc->driver->setup(&udc->gadget,
2118                                         &udc->local_setup_buff) < 0)
2119                         qe_ep0_stall(udc);
2120                 spin_lock(&udc->lock);
2121                 udc->ep0_state = DATA_STATE_NEED_ZLP;
2122         }
2123 }
2124
2125 /*-------------------------------------------------------------------------
2126         USB Interrupt handlers
2127  -------------------------------------------------------------------------*/
2128 static void suspend_irq(struct qe_udc *udc)
2129 {
2130         udc->resume_state = udc->usb_state;
2131         udc->usb_state = USB_STATE_SUSPENDED;
2132
2133         /* report suspend to the driver ,serial.c not support this*/
2134         if (udc->driver->suspend)
2135                 udc->driver->suspend(&udc->gadget);
2136 }
2137
2138 static void resume_irq(struct qe_udc *udc)
2139 {
2140         udc->usb_state = udc->resume_state;
2141         udc->resume_state = 0;
2142
2143         /* report resume to the driver , serial.c not support this*/
2144         if (udc->driver->resume)
2145                 udc->driver->resume(&udc->gadget);
2146 }
2147
2148 static void idle_irq(struct qe_udc *udc)
2149 {
2150         u8 usbs;
2151
2152         usbs = in_8(&udc->usb_regs->usb_usbs);
2153         if (usbs & USB_IDLE_STATUS_MASK) {
2154                 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2155                         suspend_irq(udc);
2156         } else {
2157                 if (udc->usb_state == USB_STATE_SUSPENDED)
2158                         resume_irq(udc);
2159         }
2160 }
2161
2162 static int reset_irq(struct qe_udc *udc)
2163 {
2164         unsigned char i;
2165
2166         if (udc->usb_state == USB_STATE_DEFAULT)
2167                 return 0;
2168
2169         qe_usb_disable();
2170         out_8(&udc->usb_regs->usb_usadr, 0);
2171
2172         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2173                 if (udc->eps[i].init)
2174                         qe_ep_reset(udc, i);
2175         }
2176
2177         reset_queues(udc);
2178         udc->usb_state = USB_STATE_DEFAULT;
2179         udc->ep0_state = WAIT_FOR_SETUP;
2180         udc->ep0_dir = USB_DIR_OUT;
2181         qe_usb_enable();
2182         return 0;
2183 }
2184
2185 static int bsy_irq(struct qe_udc *udc)
2186 {
2187         return 0;
2188 }
2189
2190 static int txe_irq(struct qe_udc *udc)
2191 {
2192         return 0;
2193 }
2194
2195 /* ep0 tx interrupt also in here */
2196 static int tx_irq(struct qe_udc *udc)
2197 {
2198         struct qe_ep *ep;
2199         struct qe_bd __iomem *bd;
2200         int i, res = 0;
2201
2202         if ((udc->usb_state == USB_STATE_ADDRESS)
2203                 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2204                 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2205
2206         for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2207                 ep = &udc->eps[i];
2208                 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2209                         bd = ep->c_txbd;
2210                         if (!(in_be32((u32 __iomem *)bd) & T_R)
2211                                                 && (in_be32(&bd->buf))) {
2212                                 /* confirm the transmitted bd */
2213                                 if (ep->epnum == 0)
2214                                         res = qe_ep0_txconf(ep);
2215                                 else
2216                                         res = qe_ep_txconf(ep);
2217                         }
2218                 }
2219         }
2220         return res;
2221 }
2222
2223
2224 /* setup packect's rx is handle in the function too */
2225 static void rx_irq(struct qe_udc *udc)
2226 {
2227         struct qe_ep *ep;
2228         struct qe_bd __iomem *bd;
2229         int i;
2230
2231         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2232                 ep = &udc->eps[i];
2233                 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2234                         bd = ep->n_rxbd;
2235                         if (!(in_be32((u32 __iomem *)bd) & R_E)
2236                                                 && (in_be32(&bd->buf))) {
2237                                 if (ep->epnum == 0) {
2238                                         qe_ep0_rx(udc);
2239                                 } else {
2240                                         /*non-setup package receive*/
2241                                         qe_ep_rx(ep);
2242                                 }
2243                         }
2244                 }
2245         }
2246 }
2247
2248 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2249 {
2250         struct qe_udc *udc = (struct qe_udc *)_udc;
2251         u16 irq_src;
2252         irqreturn_t status = IRQ_NONE;
2253         unsigned long flags;
2254
2255         spin_lock_irqsave(&udc->lock, flags);
2256
2257         irq_src = in_be16(&udc->usb_regs->usb_usber) &
2258                 in_be16(&udc->usb_regs->usb_usbmr);
2259         /* Clear notification bits */
2260         out_be16(&udc->usb_regs->usb_usber, irq_src);
2261         /* USB Interrupt */
2262         if (irq_src & USB_E_IDLE_MASK) {
2263                 idle_irq(udc);
2264                 irq_src &= ~USB_E_IDLE_MASK;
2265                 status = IRQ_HANDLED;
2266         }
2267
2268         if (irq_src & USB_E_TXB_MASK) {
2269                 tx_irq(udc);
2270                 irq_src &= ~USB_E_TXB_MASK;
2271                 status = IRQ_HANDLED;
2272         }
2273
2274         if (irq_src & USB_E_RXB_MASK) {
2275                 rx_irq(udc);
2276                 irq_src &= ~USB_E_RXB_MASK;
2277                 status = IRQ_HANDLED;
2278         }
2279
2280         if (irq_src & USB_E_RESET_MASK) {
2281                 reset_irq(udc);
2282                 irq_src &= ~USB_E_RESET_MASK;
2283                 status = IRQ_HANDLED;
2284         }
2285
2286         if (irq_src & USB_E_BSY_MASK) {
2287                 bsy_irq(udc);
2288                 irq_src &= ~USB_E_BSY_MASK;
2289                 status = IRQ_HANDLED;
2290         }
2291
2292         if (irq_src & USB_E_TXE_MASK) {
2293                 txe_irq(udc);
2294                 irq_src &= ~USB_E_TXE_MASK;
2295                 status = IRQ_HANDLED;
2296         }
2297
2298         spin_unlock_irqrestore(&udc->lock, flags);
2299
2300         return status;
2301 }
2302
2303 /*-------------------------------------------------------------------------
2304         Gadget driver register and unregister.
2305  --------------------------------------------------------------------------*/
2306 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2307 {
2308         int retval;
2309         unsigned long flags = 0;
2310
2311         /* standard operations */
2312         if (!udc_controller)
2313                 return -ENODEV;
2314
2315         if (!driver || (driver->speed != USB_SPEED_FULL
2316                         && driver->speed != USB_SPEED_HIGH)
2317                         || !driver->bind || !driver->disconnect
2318                         || !driver->setup)
2319                 return -EINVAL;
2320
2321         if (udc_controller->driver)
2322                 return -EBUSY;
2323
2324         /* lock is needed but whether should use this lock or another */
2325         spin_lock_irqsave(&udc_controller->lock, flags);
2326
2327         driver->driver.bus = NULL;
2328         /* hook up the driver */
2329         udc_controller->driver = driver;
2330         udc_controller->gadget.dev.driver = &driver->driver;
2331         udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2332         spin_unlock_irqrestore(&udc_controller->lock, flags);
2333
2334         retval = driver->bind(&udc_controller->gadget);
2335         if (retval) {
2336                 dev_err(udc_controller->dev, "bind to %s --> %d",
2337                                 driver->driver.name, retval);
2338                 udc_controller->gadget.dev.driver = NULL;
2339                 udc_controller->driver = NULL;
2340                 return retval;
2341         }
2342
2343         /* Enable IRQ reg and Set usbcmd reg EN bit */
2344         qe_usb_enable();
2345
2346         out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2347         out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2348         udc_controller->usb_state = USB_STATE_ATTACHED;
2349         udc_controller->ep0_state = WAIT_FOR_SETUP;
2350         udc_controller->ep0_dir = USB_DIR_OUT;
2351         dev_info(udc_controller->dev, "%s bind to driver %s \n",
2352                 udc_controller->gadget.name, driver->driver.name);
2353         return 0;
2354 }
2355 EXPORT_SYMBOL(usb_gadget_register_driver);
2356
2357 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2358 {
2359         struct qe_ep *loop_ep;
2360         unsigned long flags;
2361
2362         if (!udc_controller)
2363                 return -ENODEV;
2364
2365         if (!driver || driver != udc_controller->driver)
2366                 return -EINVAL;
2367
2368         /* stop usb controller, disable intr */
2369         qe_usb_disable();
2370
2371         /* in fact, no needed */
2372         udc_controller->usb_state = USB_STATE_ATTACHED;
2373         udc_controller->ep0_state = WAIT_FOR_SETUP;
2374         udc_controller->ep0_dir = 0;
2375
2376         /* stand operation */
2377         spin_lock_irqsave(&udc_controller->lock, flags);
2378         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2379         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2380         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2381                                 ep.ep_list)
2382                 nuke(loop_ep, -ESHUTDOWN);
2383         spin_unlock_irqrestore(&udc_controller->lock, flags);
2384
2385         /* report disconnect; the controller is already quiesced */
2386         driver->disconnect(&udc_controller->gadget);
2387
2388         /* unbind gadget and unhook driver. */
2389         driver->unbind(&udc_controller->gadget);
2390         udc_controller->gadget.dev.driver = NULL;
2391         udc_controller->driver = NULL;
2392
2393         dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2394                         driver->driver.name);
2395         return 0;
2396 }
2397 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2398
2399 /* udc structure's alloc and setup, include ep-param alloc */
2400 static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
2401 {
2402         struct qe_udc *udc;
2403         struct device_node *np = ofdev->node;
2404         unsigned int tmp_addr = 0;
2405         struct usb_device_para __iomem *usbpram;
2406         unsigned int i;
2407         u64 size;
2408         u32 offset;
2409
2410         udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2411         if (udc == NULL) {
2412                 dev_err(&ofdev->dev, "malloc udc failed\n");
2413                 goto cleanup;
2414         }
2415
2416         udc->dev = &ofdev->dev;
2417
2418         /* get default address of usb parameter in MURAM from device tree */
2419         offset = *of_get_address(np, 1, &size, NULL);
2420         udc->usb_param = cpm_muram_addr(offset);
2421         memset_io(udc->usb_param, 0, size);
2422
2423         usbpram = udc->usb_param;
2424         out_be16(&usbpram->frame_n, 0);
2425         out_be32(&usbpram->rstate, 0);
2426
2427         tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2428                                         sizeof(struct usb_ep_para)),
2429                                            USB_EP_PARA_ALIGNMENT);
2430         if (IS_ERR_VALUE(tmp_addr))
2431                 goto cleanup;
2432
2433         for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2434                 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2435                 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2436                 tmp_addr += 32;
2437         }
2438
2439         memset_io(udc->ep_param[0], 0,
2440                         USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2441
2442         udc->resume_state = USB_STATE_NOTATTACHED;
2443         udc->usb_state = USB_STATE_POWERED;
2444         udc->ep0_dir = 0;
2445
2446         spin_lock_init(&udc->lock);
2447         return udc;
2448
2449 cleanup:
2450         kfree(udc);
2451         return NULL;
2452 }
2453
2454 /* USB Controller register init */
2455 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2456 {
2457         struct usb_ctlr __iomem *qe_usbregs;
2458         qe_usbregs = udc->usb_regs;
2459
2460         /* Spec says that we must enable the USB controller to change mode. */
2461         out_8(&qe_usbregs->usb_usmod, 0x01);
2462         /* Mode changed, now disable it, since muram isn't initialized yet. */
2463         out_8(&qe_usbregs->usb_usmod, 0x00);
2464
2465         /* Initialize the rest. */
2466         out_be16(&qe_usbregs->usb_usbmr, 0);
2467         out_8(&qe_usbregs->usb_uscom, 0);
2468         out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2469
2470         return 0;
2471 }
2472
2473 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2474 {
2475         struct qe_ep *ep = &udc->eps[pipe_num];
2476
2477         ep->udc = udc;
2478         strcpy(ep->name, ep_name[pipe_num]);
2479         ep->ep.name = ep_name[pipe_num];
2480
2481         ep->ep.ops = &qe_ep_ops;
2482         ep->stopped = 1;
2483         ep->ep.maxpacket = (unsigned short) ~0;
2484         ep->desc = NULL;
2485         ep->dir = 0xff;
2486         ep->epnum = (u8)pipe_num;
2487         ep->sent = 0;
2488         ep->last = 0;
2489         ep->init = 0;
2490         ep->rxframe = NULL;
2491         ep->txframe = NULL;
2492         ep->tx_req = NULL;
2493         ep->state = EP_STATE_IDLE;
2494         ep->has_data = 0;
2495
2496         /* the queue lists any req for this ep */
2497         INIT_LIST_HEAD(&ep->queue);
2498
2499         /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2500         if (pipe_num != 0)
2501                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2502
2503         ep->gadget = &udc->gadget;
2504
2505         return 0;
2506 }
2507
2508 /*-----------------------------------------------------------------------
2509  *      UDC device Driver operation functions                           *
2510  *----------------------------------------------------------------------*/
2511 static void qe_udc_release(struct device *dev)
2512 {
2513         int i = 0;
2514
2515         complete(udc_controller->done);
2516         cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2517         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2518                 udc_controller->ep_param[i] = NULL;
2519
2520         kfree(udc_controller);
2521         udc_controller = NULL;
2522 }
2523
2524 /* Driver probe functions */
2525 static int __devinit qe_udc_probe(struct of_device *ofdev,
2526                         const struct of_device_id *match)
2527 {
2528         struct device_node *np = ofdev->node;
2529         struct qe_ep *ep;
2530         unsigned int ret = 0;
2531         unsigned int i;
2532         const void *prop;
2533
2534         prop = of_get_property(np, "mode", NULL);
2535         if (!prop || strcmp(prop, "peripheral"))
2536                 return -ENODEV;
2537
2538         /* Initialize the udc structure including QH member and other member */
2539         udc_controller = qe_udc_config(ofdev);
2540         if (!udc_controller) {
2541                 dev_err(&ofdev->dev, "failed to initialize\n");
2542                 return -ENOMEM;
2543         }
2544
2545         udc_controller->soc_type = (unsigned long)match->data;
2546         udc_controller->usb_regs = of_iomap(np, 0);
2547         if (!udc_controller->usb_regs) {
2548                 ret = -ENOMEM;
2549                 goto err1;
2550         }
2551
2552         /* initialize usb hw reg except for regs for EP,
2553          * leave usbintr reg untouched*/
2554         qe_udc_reg_init(udc_controller);
2555
2556         /* here comes the stand operations for probe
2557          * set the qe_udc->gadget.xxx */
2558         udc_controller->gadget.ops = &qe_gadget_ops;
2559
2560         /* gadget.ep0 is a pointer */
2561         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2562
2563         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2564
2565         /* modify in register gadget process */
2566         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2567
2568         /* name: Identifies the controller hardware type. */
2569         udc_controller->gadget.name = driver_name;
2570
2571         device_initialize(&udc_controller->gadget.dev);
2572
2573         dev_set_name(&udc_controller->gadget.dev, "gadget");
2574
2575         udc_controller->gadget.dev.release = qe_udc_release;
2576         udc_controller->gadget.dev.parent = &ofdev->dev;
2577
2578         /* initialize qe_ep struct */
2579         for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2580                 /* because the ep type isn't decide here so
2581                  * qe_ep_init() should be called in ep_enable() */
2582
2583                 /* setup the qe_ep struct and link ep.ep.list
2584                  * into gadget.ep_list */
2585                 qe_ep_config(udc_controller, (unsigned char)i);
2586         }
2587
2588         /* ep0 initialization in here */
2589         ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2590         if (ret)
2591                 goto err2;
2592
2593         /* create a buf for ZLP send, need to remain zeroed */
2594         udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2595         if (udc_controller->nullbuf == NULL) {
2596                 dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
2597                 ret = -ENOMEM;
2598                 goto err3;
2599         }
2600
2601         /* buffer for data of get_status request */
2602         udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2603         if (udc_controller->statusbuf == NULL) {
2604                 ret = -ENOMEM;
2605                 goto err4;
2606         }
2607
2608         udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2609         if (udc_controller->nullp == DMA_ADDR_INVALID) {
2610                 udc_controller->nullp = dma_map_single(
2611                                         udc_controller->gadget.dev.parent,
2612                                         udc_controller->nullbuf,
2613                                         256,
2614                                         DMA_TO_DEVICE);
2615                 udc_controller->nullmap = 1;
2616         } else {
2617                 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2618                                         udc_controller->nullp, 256,
2619                                         DMA_TO_DEVICE);
2620         }
2621
2622         tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2623                         (unsigned long)udc_controller);
2624         /* request irq and disable DR  */
2625         udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2626         if (!udc_controller->usb_irq) {
2627                 ret = -EINVAL;
2628                 goto err_noirq;
2629         }
2630
2631         ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2632                                 driver_name, udc_controller);
2633         if (ret) {
2634                 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2635                         udc_controller->usb_irq, ret);
2636                 goto err5;
2637         }
2638
2639         ret = device_add(&udc_controller->gadget.dev);
2640         if (ret)
2641                 goto err6;
2642
2643         dev_info(udc_controller->dev,
2644                         "%s USB controller initialized as device\n",
2645                         (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2646         return 0;
2647
2648 err6:
2649         free_irq(udc_controller->usb_irq, udc_controller);
2650 err5:
2651         irq_dispose_mapping(udc_controller->usb_irq);
2652 err_noirq:
2653         if (udc_controller->nullmap) {
2654                 dma_unmap_single(udc_controller->gadget.dev.parent,
2655                         udc_controller->nullp, 256,
2656                                 DMA_TO_DEVICE);
2657                         udc_controller->nullp = DMA_ADDR_INVALID;
2658         } else {
2659                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2660                         udc_controller->nullp, 256,
2661                                 DMA_TO_DEVICE);
2662         }
2663         kfree(udc_controller->statusbuf);
2664 err4:
2665         kfree(udc_controller->nullbuf);
2666 err3:
2667         ep = &udc_controller->eps[0];
2668         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2669         kfree(ep->rxframe);
2670         kfree(ep->rxbuffer);
2671         kfree(ep->txframe);
2672 err2:
2673         iounmap(udc_controller->usb_regs);
2674 err1:
2675         kfree(udc_controller);
2676         udc_controller = NULL;
2677         return ret;
2678 }
2679
2680 #ifdef CONFIG_PM
2681 static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
2682 {
2683         return -ENOTSUPP;
2684 }
2685
2686 static int qe_udc_resume(struct of_device *dev)
2687 {
2688         return -ENOTSUPP;
2689 }
2690 #endif
2691
2692 static int __devexit qe_udc_remove(struct of_device *ofdev)
2693 {
2694         struct qe_ep *ep;
2695         unsigned int size;
2696
2697         DECLARE_COMPLETION(done);
2698
2699         if (!udc_controller)
2700                 return -ENODEV;
2701
2702         udc_controller->done = &done;
2703         tasklet_disable(&udc_controller->rx_tasklet);
2704
2705         if (udc_controller->nullmap) {
2706                 dma_unmap_single(udc_controller->gadget.dev.parent,
2707                         udc_controller->nullp, 256,
2708                                 DMA_TO_DEVICE);
2709                         udc_controller->nullp = DMA_ADDR_INVALID;
2710         } else {
2711                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2712                         udc_controller->nullp, 256,
2713                                 DMA_TO_DEVICE);
2714         }
2715         kfree(udc_controller->statusbuf);
2716         kfree(udc_controller->nullbuf);
2717
2718         ep = &udc_controller->eps[0];
2719         cpm_muram_free(cpm_muram_offset(ep->rxbase));
2720         size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2721
2722         kfree(ep->rxframe);
2723         if (ep->rxbufmap) {
2724                 dma_unmap_single(udc_controller->gadget.dev.parent,
2725                                 ep->rxbuf_d, size,
2726                                 DMA_FROM_DEVICE);
2727                 ep->rxbuf_d = DMA_ADDR_INVALID;
2728         } else {
2729                 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2730                                 ep->rxbuf_d, size,
2731                                 DMA_FROM_DEVICE);
2732         }
2733
2734         kfree(ep->rxbuffer);
2735         kfree(ep->txframe);
2736
2737         free_irq(udc_controller->usb_irq, udc_controller);
2738         irq_dispose_mapping(udc_controller->usb_irq);
2739
2740         tasklet_kill(&udc_controller->rx_tasklet);
2741
2742         iounmap(udc_controller->usb_regs);
2743
2744         device_unregister(&udc_controller->gadget.dev);
2745         /* wait for release() of gadget.dev to free udc */
2746         wait_for_completion(&done);
2747
2748         return 0;
2749 }
2750
2751 /*-------------------------------------------------------------------------*/
2752 static const struct of_device_id qe_udc_match[] __devinitconst = {
2753         {
2754                 .compatible = "fsl,mpc8323-qe-usb",
2755                 .data = (void *)PORT_QE,
2756         },
2757         {
2758                 .compatible = "fsl,mpc8360-qe-usb",
2759                 .data = (void *)PORT_QE,
2760         },
2761         {
2762                 .compatible = "fsl,mpc8272-cpm-usb",
2763                 .data = (void *)PORT_CPM,
2764         },
2765         {},
2766 };
2767
2768 MODULE_DEVICE_TABLE(of, qe_udc_match);
2769
2770 static struct of_platform_driver udc_driver = {
2771         .driver = {
2772                 .name = (char *)driver_name,
2773                 .owner = THIS_MODULE,
2774                 .of_match_table = qe_udc_match,
2775         },
2776         .probe          = qe_udc_probe,
2777         .remove         = __devexit_p(qe_udc_remove),
2778 #ifdef CONFIG_PM
2779         .suspend        = qe_udc_suspend,
2780         .resume         = qe_udc_resume,
2781 #endif
2782 };
2783
2784 static int __init qe_udc_init(void)
2785 {
2786         printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2787                         DRIVER_VERSION);
2788         return of_register_platform_driver(&udc_driver);
2789 }
2790
2791 static void __exit qe_udc_exit(void)
2792 {
2793         of_unregister_platform_driver(&udc_driver);
2794 }
2795
2796 module_init(qe_udc_init);
2797 module_exit(qe_udc_exit);
2798
2799 MODULE_DESCRIPTION(DRIVER_DESC);
2800 MODULE_AUTHOR(DRIVER_AUTHOR);
2801 MODULE_LICENSE("GPL");
2802