kernel/drivers/staging/emxx_udc/emxx_udc.c

   1 /*
   2  *  drivers/usb/gadget/emxx_udc.c
   3  *     EMXX FCD (Function Controller Driver) for USB.
   4  *
   5  *  Copyright (C) 2010 Renesas Electronics Corporation
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2
   9  *  as published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software Foundation,
  18  *  Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/delay.h>
  25 #include <linux/ioport.h>
  26 #include <linux/slab.h>
  27 #include <linux/errno.h>
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/clk.h>
  33 #include <linux/ctype.h>
  34 #include <linux/string.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/workqueue.h>
  37 #include <linux/device.h>
  38
  39 #include <linux/usb/ch9.h>
  40 #include <linux/usb/gadget.h>
  41
  42 #include <linux/irq.h>
  43 #include <linux/gpio.h>
  44
  45 #include "emxx_udc.h"
  46
  47 #define DRIVER_DESC     "EMXX UDC driver"
  48 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  49
  50 static const char       driver_name[] = "emxx_udc";
  51 static const char       driver_desc[] = DRIVER_DESC;
  52
  53 /*===========================================================================*/
  54 /* Prototype */
  55 static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *, struct nbu2ss_ep *);
  56 static void _nbu2ss_ep0_enable(struct nbu2ss_udc *);
  57 /*static void _nbu2ss_ep0_disable(struct nbu2ss_udc *);*/
  58 static void _nbu2ss_ep_done(struct nbu2ss_ep *, struct nbu2ss_req *, int);
  59 static void _nbu2ss_set_test_mode(struct nbu2ss_udc *, u32 mode);
  60 static void _nbu2ss_endpoint_toggle_reset(struct nbu2ss_udc *udc, u8 ep_adrs);
  61
  62 static int _nbu2ss_pullup(struct nbu2ss_udc *, int);
  63 static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *);
  64
  65 /*===========================================================================*/
  66 /* Macro */
  67 #define _nbu2ss_zero_len_pkt(udc, epnum)        \
  68         _nbu2ss_ep_in_end(udc, epnum, 0, 0)
  69
  70
  71 /*===========================================================================*/
  72 /* Global */
  73 struct nbu2ss_udc udc_controller;
  74
  75
  76 /*-------------------------------------------------------------------------*/
  77 /* Read */
  78 static inline u32 _nbu2ss_readl(void *address)
  79 {
  80         return __raw_readl(address);
  81 }
  82
  83 /*-------------------------------------------------------------------------*/
  84 /* Write */
  85 static inline void _nbu2ss_writel(void *address, u32 udata)
  86 {
  87         __raw_writel(udata, address);
  88 }
  89
  90 /*-------------------------------------------------------------------------*/
  91 /* Set Bit */
  92 static inline void _nbu2ss_bitset(void *address, u32 udata)
  93 {
  94         u32     reg_dt = __raw_readl(address) | (udata);
  95
  96         __raw_writel(reg_dt, address);
  97 }
  98
  99 /*-------------------------------------------------------------------------*/
 100 /* Clear Bit */
 101 static inline void _nbu2ss_bitclr(void *address, u32 udata)
 102 {
 103         u32     reg_dt = __raw_readl(address) & ~(udata);
 104
 105         __raw_writel(reg_dt, address);
 106 }
 107
 108 #ifdef UDC_DEBUG_DUMP
 109 /*-------------------------------------------------------------------------*/
 110 static void _nbu2ss_dump_register(struct nbu2ss_udc *udc)
 111 {
 112         int             i;
 113         u32 reg_data;
 114
 115         pr_info("=== %s()\n", __func__);
 116
 117         if (udc == NULL) {
 118                 pr_err("%s udc == NULL\n", __func__);
 119                 return;
 120         }
 121
 122         spin_unlock(&udc->lock);
 123
 124         dev_dbg(&udc->dev, "\n-USB REG-\n");
 125         for (i = 0x0 ; i < USB_BASE_SIZE ; i += 16) {
 126                 reg_data =   _nbu2ss_readl(
 127                         (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i));
 128                 dev_dbg(&udc->dev, "USB%04x =%08x", i, (int)reg_data);
 129
 130                 reg_data =  _nbu2ss_readl(
 131                         (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i + 4));
 132                 dev_dbg(&udc->dev, " %08x", (int)reg_data);
 133
 134                 reg_data =  _nbu2ss_readl(
 135                         (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i + 8));
 136                 dev_dbg(&udc->dev, " %08x", (int)reg_data);
 137
 138                 reg_data =  _nbu2ss_readl(
 139                         (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i + 12));
 140                 dev_dbg(&udc->dev, " %08x\n", (int)reg_data);
 141
 142         }
 143
 144         spin_lock(&udc->lock);
 145 }
 146 #endif /* UDC_DEBUG_DUMP */
 147
 148 /*-------------------------------------------------------------------------*/
 149 /* Endpoint 0 Callback (Complete) */
 150 static void _nbu2ss_ep0_complete(struct usb_ep *_ep, struct usb_request *_req)
 151 {
 152         u8              recipient;
 153         u16             selector;
 154         u32             test_mode;
 155         struct usb_ctrlrequest  *p_ctrl;
 156         struct nbu2ss_udc *udc;
 157
 158         if ((_ep == NULL) || (_req == NULL))
 159                 return;
 160
 161         udc = (struct nbu2ss_udc *)_req->context;
 162         p_ctrl = &udc->ctrl;
 163         if ((p_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
 164
 165                 if (p_ctrl->bRequest == USB_REQ_SET_FEATURE) {
 166                         /*-------------------------------------------------*/
 167                         /* SET_FEATURE */
 168                         recipient = (u8)(p_ctrl->bRequestType & USB_RECIP_MASK);
 169                         selector  = p_ctrl->wValue;
 170                         if ((recipient == USB_RECIP_DEVICE) &&
 171                                 (selector == USB_DEVICE_TEST_MODE)) {
 172                                 test_mode = (u32)(p_ctrl->wIndex >> 8);
 173                                 _nbu2ss_set_test_mode(udc, test_mode);
 174                         }
 175                 }
 176         }
 177 }
 178
 179 /*-------------------------------------------------------------------------*/
 180 /* Initialization usb_request */
 181 static void _nbu2ss_create_ep0_packet(
 182         struct nbu2ss_udc *udc,
 183         void *p_buf,
 184         unsigned length
 185 )
 186 {
 187         udc->ep0_req.req.buf            = p_buf;
 188         udc->ep0_req.req.length         = length;
 189         udc->ep0_req.req.dma            = 0;
 190         udc->ep0_req.req.zero           = TRUE;
 191         udc->ep0_req.req.complete       = _nbu2ss_ep0_complete;
 192         udc->ep0_req.req.status         = -EINPROGRESS;
 193         udc->ep0_req.req.context        = udc;
 194         udc->ep0_req.req.actual         = 0;
 195 }
 196
 197 /*-------------------------------------------------------------------------*/
 198 /* Acquisition of the first address of RAM(FIFO) */
 199 static u32 _nbu2ss_get_begin_ram_address(struct nbu2ss_udc *udc)
 200 {
 201         u32             num, buf_type;
 202         u32             data, last_ram_adr, use_ram_size;
 203
 204         struct ep_regs *p_ep_regs;
 205
 206         last_ram_adr = (D_RAM_SIZE_CTRL / sizeof(u32)) * 2;
 207         use_ram_size = 0;
 208
 209         for (num = 0; num < NUM_ENDPOINTS - 1; num++) {
 210                 p_ep_regs = &udc->p_regs->EP_REGS[num];
 211                 data = _nbu2ss_readl(&p_ep_regs->EP_PCKT_ADRS);
 212                 buf_type = _nbu2ss_readl(&p_ep_regs->EP_CONTROL) & EPn_BUF_TYPE;
 213                 if (buf_type == 0) {
 214                         /* Single Buffer */
 215                         use_ram_size += (data & EPn_MPKT) / sizeof(u32);
 216                 } else {
 217                         /* Double Buffer */
 218                         use_ram_size += ((data & EPn_MPKT) / sizeof(u32)) * 2;
 219                 }
 220
 221                 if ((data >> 16) > last_ram_adr)
 222                         last_ram_adr = data>>16;
 223         }
 224
 225         return last_ram_adr + use_ram_size;
 226 }
 227
 228 /*-------------------------------------------------------------------------*/
 229 /* Construction of Endpoint */
 230 static int _nbu2ss_ep_init(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 231 {
 232         u32             num;
 233         u32             data;
 234         u32             begin_adrs;
 235
 236         if (ep->epnum == 0)
 237                 return  -EINVAL;
 238
 239         num = ep->epnum - 1;
 240
 241         /*-------------------------------------------------------------*/
 242         /* RAM Transfer Address */
 243         begin_adrs = _nbu2ss_get_begin_ram_address(udc);
 244         data = (begin_adrs << 16) | ep->ep.maxpacket;
 245         _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_PCKT_ADRS, data);
 246
 247         /*-------------------------------------------------------------*/
 248         /* Interrupt Enable */
 249         data = 1 << (ep->epnum + 8);
 250         _nbu2ss_bitset(&udc->p_regs->USB_INT_ENA, data);
 251
 252         /*-------------------------------------------------------------*/
 253         /* Endpoint Type(Mode) */
 254         /*   Bulk, Interrupt, ISO */
 255         switch (ep->ep_type) {
 256         case USB_ENDPOINT_XFER_BULK:
 257                 data = EPn_BULK;
 258                 break;
 259
 260         case USB_ENDPOINT_XFER_INT:
 261                 data = EPn_BUF_SINGLE | EPn_INTERRUPT;
 262                 break;
 263
 264         case USB_ENDPOINT_XFER_ISOC:
 265                 data = EPn_ISO;
 266                 break;
 267
 268         default:
 269                 data = 0;
 270                 break;
 271         }
 272
 273         _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 274         _nbu2ss_endpoint_toggle_reset(udc, (ep->epnum|ep->direct));
 275
 276         if (ep->direct == USB_DIR_OUT) {
 277                 /*---------------------------------------------------------*/
 278                 /* OUT */
 279                 data = EPn_EN | EPn_BCLR | EPn_DIR0;
 280                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 281
 282                 data = (EPn_ONAK | EPn_OSTL_EN | EPn_OSTL);
 283                 _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 284
 285                 data = (EPn_OUT_EN | EPn_OUT_END_EN);
 286                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
 287         } else {
 288                 /*---------------------------------------------------------*/
 289                 /* IN */
 290                 data = (EPn_EN | EPn_BCLR | EPn_AUTO);
 291                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 292
 293                 data = (EPn_ISTL);
 294                 _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 295
 296                 data = (EPn_IN_EN | EPn_IN_END_EN);
 297                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
 298         }
 299
 300         return 0;
 301 }
 302
 303 /*-------------------------------------------------------------------------*/
 304 /* Release of Endpoint */
 305 static int _nbu2ss_epn_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 306 {
 307         u32             num;
 308         u32             data;
 309
 310         if ((ep->epnum == 0) || (udc->vbus_active == 0))
 311                 return  -EINVAL;
 312
 313         num = ep->epnum - 1;
 314
 315         /*-------------------------------------------------------------*/
 316         /* RAM Transfer Address */
 317         _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_PCKT_ADRS, 0);
 318
 319         /*-------------------------------------------------------------*/
 320         /* Interrupt Disable */
 321         data = 1 << (ep->epnum + 8);
 322         _nbu2ss_bitclr(&udc->p_regs->USB_INT_ENA, data);
 323
 324         if (ep->direct == USB_DIR_OUT) {
 325                 /*---------------------------------------------------------*/
 326                 /* OUT */
 327                 data = EPn_ONAK | EPn_BCLR;
 328                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 329
 330                 data = EPn_EN | EPn_DIR0;
 331                 _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 332
 333                 data = EPn_OUT_EN | EPn_OUT_END_EN;
 334                 _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
 335         } else {
 336                 /*---------------------------------------------------------*/
 337                 /* IN */
 338                 data = EPn_BCLR;
 339                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 340
 341                 data = EPn_EN | EPn_AUTO;
 342                 _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
 343
 344                 data = EPn_IN_EN | EPn_IN_END_EN;
 345                 _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
 346         }
 347
 348         return 0;
 349 }
 350
 351 /*-------------------------------------------------------------------------*/
 352 /* DMA setting (without Endpoint 0) */
 353 static void _nbu2ss_ep_dma_init(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 354 {
 355         u32             num;
 356         u32             data;
 357
 358         data = _nbu2ss_readl(&udc->p_regs->USBSSCONF);
 359         if (((ep->epnum == 0) || (data & (1 << ep->epnum)) == 0))
 360                 return;         /* Not Support DMA */
 361
 362         num = ep->epnum - 1;
 363
 364         if (ep->direct == USB_DIR_OUT) {
 365                 /*---------------------------------------------------------*/
 366                 /* OUT */
 367                 data = ep->ep.maxpacket;
 368                 _nbu2ss_writel(&udc->p_regs->EP_DCR[num].EP_DCR2, data);
 369
 370                 /*---------------------------------------------------------*/
 371                 /* Transfer Direct */
 372                 data = DCR1_EPn_DIR0;
 373                 _nbu2ss_bitset(&udc->p_regs->EP_DCR[num].EP_DCR1, data);
 374
 375                 /*---------------------------------------------------------*/
 376                 /* DMA Mode etc. */
 377                 data = EPn_STOP_MODE | EPn_STOP_SET  | EPn_DMAMODE0;
 378                 _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_DMA_CTRL, data);
 379         } else {
 380                 /*---------------------------------------------------------*/
 381                 /* IN */
 382                 _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, EPn_AUTO);
 383
 384                 /*---------------------------------------------------------*/
 385                 /* DMA Mode etc. */
 386                 data = EPn_BURST_SET | EPn_DMAMODE0;
 387                 _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_DMA_CTRL, data);
 388         }
 389 }
 390
 391 /*-------------------------------------------------------------------------*/
 392 /* DMA setting release */
 393 static void _nbu2ss_ep_dma_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 394 {
 395         u32             num;
 396         u32             data;
 397         struct fc_regs  *preg = udc->p_regs;
 398
 399         if (udc->vbus_active == 0)
 400                 return;         /* VBUS OFF */
 401
 402         data = _nbu2ss_readl(&preg->USBSSCONF);
 403         if ((ep->epnum == 0) || ((data & (1 << ep->epnum)) == 0))
 404                 return;         /* Not Support DMA */
 405
 406         num = ep->epnum - 1;
 407
 408         _nbu2ss_ep_dma_abort(udc, ep);
 409
 410         if (ep->direct == USB_DIR_OUT) {
 411                 /*---------------------------------------------------------*/
 412                 /* OUT */
 413                 _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, 0);
 414                 _nbu2ss_bitclr(&preg->EP_DCR[num].EP_DCR1, DCR1_EPn_DIR0);
 415                 _nbu2ss_writel(&preg->EP_REGS[num].EP_DMA_CTRL, 0);
 416         } else {
 417                 /*---------------------------------------------------------*/
 418                 /* IN */
 419                 _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL, EPn_AUTO);
 420                 _nbu2ss_writel(&preg->EP_REGS[num].EP_DMA_CTRL, 0);
 421         }
 422 }
 423
 424 /*-------------------------------------------------------------------------*/
 425 /* Abort DMA */
 426 static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
 427 {
 428         struct fc_regs  *preg = udc->p_regs;
 429
 430         _nbu2ss_bitclr(&preg->EP_DCR[ep->epnum-1].EP_DCR1, DCR1_EPn_REQEN);
 431         mdelay(DMA_DISABLE_TIME);       /* DCR1_EPn_REQEN Clear */
 432         _nbu2ss_bitclr(&preg->EP_REGS[ep->epnum-1].EP_DMA_CTRL, EPn_DMA_EN);
 433 }
 434
 435 /*-------------------------------------------------------------------------*/
 436 /* Start IN Transfer */
 437 static void _nbu2ss_ep_in_end(
 438         struct nbu2ss_udc *udc,
 439         u32 epnum,
 440         u32 data32,
 441         u32 length
 442 )
 443 {
 444         u32             data;
 445         u32             num;
 446         struct fc_regs  *preg = udc->p_regs;
 447
 448         if (length >= sizeof(u32))
 449                 return;
 450
 451         if (epnum == 0) {
 452                 _nbu2ss_bitclr(&preg->EP0_CONTROL, EP0_AUTO);
 453
 454                 /* Writing of 1-4 bytes */
 455                 if (length)
 456                         _nbu2ss_writel(&preg->EP0_WRITE, data32);
 457
 458                 data = ((length << 5) & EP0_DW) | EP0_DEND;
 459                 _nbu2ss_writel(&preg->EP0_CONTROL, data);
 460
 461                 _nbu2ss_bitset(&preg->EP0_CONTROL, EP0_AUTO);
 462         } else {
 463                 num = epnum - 1;
 464
 465                 _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL, EPn_AUTO);
 466
 467                 /* Writing of 1-4 bytes */
 468                 if (length)
 469                         _nbu2ss_writel(&preg->EP_REGS[num].EP_WRITE, data32);
 470
 471                 data = (((((u32)length) << 5) & EPn_DW) | EPn_DEND);
 472                 _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, data);
 473
 474                 _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, EPn_AUTO);
 475         }
 476 }
 477
 478 #ifdef USE_DMA
 479 /*-------------------------------------------------------------------------*/
 480 static void _nbu2ss_dma_map_single(
 481         struct nbu2ss_udc *udc,
 482         struct nbu2ss_ep *ep,
 483         struct nbu2ss_req *req,
 484         u8              direct
 485 )
 486 {
 487         if (req->req.dma == DMA_ADDR_INVALID) {
 488                 if (req->unaligned)
 489                         req->req.dma = ep->phys_buf;
 490                 else {
 491                         req->req.dma = dma_map_single(
 492                                 udc->gadget.dev.parent,
 493                                 req->req.buf,
 494                                 req->req.length,
 495                                 (direct == USB_DIR_IN)
 496                                 ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 497                 }
 498                 req->mapped = 1;
 499         } else {
 500                 if (!req->unaligned)
 501                         dma_sync_single_for_device(
 502                                 udc->gadget.dev.parent,
 503                                 req->req.dma,
 504                                 req->req.length,
 505                                 (direct == USB_DIR_IN)
 506                                 ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 507
 508                 req->mapped = 0;
 509         }
 510 }
 511
 512 /*-------------------------------------------------------------------------*/
 513 static void _nbu2ss_dma_unmap_single(
 514         struct nbu2ss_udc *udc,
 515         struct nbu2ss_ep *ep,
 516         struct nbu2ss_req *req,
 517         u8              direct
 518 )
 519 {
 520         u8              data[4];
 521         u8              *p;
 522         u32             count = 0;
 523
 524         if (direct == USB_DIR_OUT) {
 525                 count = req->req.actual % 4;
 526                 if (count) {
 527                         p = req->req.buf;
 528                         p += (req->req.actual - count);
 529                         memcpy(data, p, count);
 530                 }
 531         }
 532
 533         if (req->mapped) {
 534                 if (req->unaligned) {
 535                         if (direct == USB_DIR_OUT)
 536                                 memcpy(req->req.buf, ep->virt_buf,
 537                                         req->req.actual & 0xfffffffc);
 538                 } else
 539                         dma_unmap_single(udc->gadget.dev.parent,
 540                                 req->req.dma, req->req.length,
 541                                 (direct == USB_DIR_IN)
 542                                 ? DMA_TO_DEVICE
 543                                 : DMA_FROM_DEVICE);
 544                 req->req.dma = DMA_ADDR_INVALID;
 545                 req->mapped = 0;
 546         } else {
 547                 if (!req->unaligned)
 548                         dma_sync_single_for_cpu(udc->gadget.dev.parent,
 549                                 req->req.dma, req->req.length,
 550                                 (direct == USB_DIR_IN)
 551                                 ? DMA_TO_DEVICE
 552                                 : DMA_FROM_DEVICE);
 553         }
 554
 555         if (count) {
 556                 p = req->req.buf;
 557                 p += (req->req.actual - count);
 558                 memcpy(p, data, count);
 559         }
 560 }
 561 #endif
 562
 563 /*-------------------------------------------------------------------------*/
 564 /* Endpoint 0 OUT Transfer (PIO) */
 565 static int EP0_out_PIO(struct nbu2ss_udc *udc, u8 *pBuf, u32 length)
 566 {
 567         u32             i;
 568         int             nret   = 0;
 569         u32             iWordLength = 0;
 570         union usb_reg_access *pBuf32 = (union usb_reg_access *)pBuf;
 571
 572         /*------------------------------------------------------------*/
 573         /* Read Length */
 574         iWordLength = length / sizeof(u32);
 575
 576         /*------------------------------------------------------------*/
 577         /* PIO Read */
 578         if (iWordLength) {
 579                 for (i = 0; i < iWordLength; i++) {
 580                         pBuf32->dw = _nbu2ss_readl(&udc->p_regs->EP0_READ);
 581                         pBuf32++;
 582                 }
 583                 nret = iWordLength * sizeof(u32);
 584         }
 585
 586         return nret;
 587 }
 588
 589 /*-------------------------------------------------------------------------*/
 590 /* Endpoint 0 OUT Transfer (PIO, OverBytes) */
 591 static int EP0_out_OverBytes(struct nbu2ss_udc *udc, u8 *pBuf, u32 length)
 592 {
 593         u32             i;
 594         u32             iReadSize = 0;
 595         union usb_reg_access  Temp32;
 596         union usb_reg_access  *pBuf32 = (union usb_reg_access *)pBuf;
 597
 598         if ((0 < length) && (length < sizeof(u32))) {
 599                 Temp32.dw = _nbu2ss_readl(&udc->p_regs->EP0_READ);
 600                 for (i = 0 ; i < length ; i++)
 601                         pBuf32->byte.DATA[i] = Temp32.byte.DATA[i];
 602                 iReadSize += length;
 603         }
 604
 605         return iReadSize;
 606 }
 607
 608 /*-------------------------------------------------------------------------*/
 609 /* Endpoint 0 IN Transfer (PIO) */
 610 static int EP0_in_PIO(struct nbu2ss_udc *udc, u8 *pBuf, u32 length)
 611 {
 612         u32             i;
 613         u32             iMaxLength   = EP0_PACKETSIZE;
 614         u32             iWordLength  = 0;
 615         u32             iWriteLength = 0;
 616         union usb_reg_access  *pBuf32 = (union usb_reg_access *)pBuf;
 617
 618         /*------------------------------------------------------------*/
 619         /* Transfer Length */
 620         if (iMaxLength < length)
 621                 iWordLength = iMaxLength / sizeof(u32);
 622         else
 623                 iWordLength = length / sizeof(u32);
 624
 625         /*------------------------------------------------------------*/
 626         /* PIO */
 627         for (i = 0; i < iWordLength; i++) {
 628                 _nbu2ss_writel(&udc->p_regs->EP0_WRITE, pBuf32->dw);
 629                 pBuf32++;
 630                 iWriteLength += sizeof(u32);
 631         }
 632
 633         return iWriteLength;
 634 }
 635
 636 /*-------------------------------------------------------------------------*/
 637 /* Endpoint 0 IN Transfer (PIO, OverBytes) */
 638 static int EP0_in_OverBytes(struct nbu2ss_udc *udc, u8 *pBuf, u32 iRemainSize)
 639 {
 640         u32             i;
 641         union usb_reg_access  Temp32;
 642         union usb_reg_access  *pBuf32 = (union usb_reg_access *)pBuf;
 643
 644         if ((0 < iRemainSize) && (iRemainSize < sizeof(u32))) {
 645                 for (i = 0 ; i < iRemainSize ; i++)
 646                         Temp32.byte.DATA[i] = pBuf32->byte.DATA[i];
 647                 _nbu2ss_ep_in_end(udc, 0, Temp32.dw, iRemainSize);
 648
 649                 return iRemainSize;
 650         }
 651
 652         return 0;
 653 }
 654
 655 /*-------------------------------------------------------------------------*/
 656 /* Transfer NULL Packet (Epndoint 0) */
 657 static int EP0_send_NULL(struct nbu2ss_udc *udc, bool pid_flag)
 658 {
 659         u32             data;
 660
 661         data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
 662         data &= ~(u32)EP0_INAK;
 663
 664         if (pid_flag)
 665                 data |= (EP0_INAK_EN | EP0_PIDCLR | EP0_DEND);
 666         else
 667                 data |= (EP0_INAK_EN | EP0_DEND);
 668
 669         _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data);
 670
 671         return 0;
 672 }
 673
 674 /*-------------------------------------------------------------------------*/
 675 /* Receive NULL Packet (Endpoint 0) */
 676 static int EP0_receive_NULL(struct nbu2ss_udc *udc, bool pid_flag)
 677 {
 678         u32             data;
 679
 680         data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
 681         data &= ~(u32)EP0_ONAK;
 682
 683         if (pid_flag)
 684                 data |= EP0_PIDCLR;
 685
 686         _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data);
 687
 688         return 0;
 689 }
 690
 691 /*-------------------------------------------------------------------------*/
 692 static int _nbu2ss_ep0_in_transfer(
 693         struct nbu2ss_udc *udc,
 694         struct nbu2ss_ep *ep,
 695         struct nbu2ss_req *req
 696 )
 697 {
 698         u8              *pBuffer;                       /* IN Data Buffer */
 699         u32             data;
 700         u32             iRemainSize = 0;
 701         int             result = 0;
 702
 703         /*-------------------------------------------------------------*/
 704         /* End confirmation */
 705         if (req->req.actual == req->req.length) {
 706                 if ((req->req.actual % EP0_PACKETSIZE) == 0) {
 707                         if (req->zero) {
 708                                 req->zero = false;
 709                                 EP0_send_NULL(udc, FALSE);
 710                                 return 1;
 711                         }
 712                 }
 713
 714                 return 0;               /* Transfer End */
 715         }
 716
 717         /*-------------------------------------------------------------*/
 718         /* NAK release */
 719         data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
 720         data |= EP0_INAK_EN;
 721         data &= ~(u32)EP0_INAK;
 722         _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data);
 723
 724         iRemainSize = req->req.length - req->req.actual;
 725         pBuffer = (u8 *)req->req.buf;
 726         pBuffer += req->req.actual;
 727
 728         /*-------------------------------------------------------------*/
 729         /* Data transfer */
 730         result = EP0_in_PIO(udc, pBuffer, iRemainSize);
 731
 732         req->div_len = result;
 733         iRemainSize -= result;
 734
 735         if (iRemainSize == 0) {
 736                 EP0_send_NULL(udc, FALSE);
 737                 return result;
 738         }
 739
 740         if ((iRemainSize < sizeof(u32)) && (result != EP0_PACKETSIZE)) {
 741                 pBuffer += result;
 742                 result += EP0_in_OverBytes(udc, pBuffer, iRemainSize);
 743                 req->div_len = result;
 744         }
 745
 746         return result;
 747 }
 748
 749 /*-------------------------------------------------------------------------*/
 750 static int _nbu2ss_ep0_out_transfer(
 751         struct nbu2ss_udc *udc,
 752         struct nbu2ss_ep *ep,
 753         struct nbu2ss_req *req
 754 )
 755 {
 756         u8              *pBuffer;
 757         u32             iRemainSize;
 758         u32             iRecvLength;
 759         int             result = 0;
 760         int             fRcvZero;
 761
 762         /*-------------------------------------------------------------*/
 763         /* Receive data confirmation */
 764         iRecvLength = _nbu2ss_readl(&udc->p_regs->EP0_LENGTH) & EP0_LDATA;
 765         if (iRecvLength != 0) {
 766
 767                 fRcvZero = 0;
 768
 769                 iRemainSize = req->req.length - req->req.actual;
 770                 pBuffer = (u8 *)req->req.buf;
 771                 pBuffer += req->req.actual;
 772
 773                 result = EP0_out_PIO(udc, pBuffer
 774                                         , min(iRemainSize, iRecvLength));
 775                 if (result < 0)
 776                         return result;
 777
 778                 req->req.actual += result;
 779                 iRecvLength -= result;
 780
 781                 if ((0 < iRecvLength) && (iRecvLength < sizeof(u32))) {
 782                         pBuffer += result;
 783                         iRemainSize -= result;
 784
 785                         result = EP0_out_OverBytes(udc, pBuffer
 786                                         , min(iRemainSize, iRecvLength));
 787                         req->req.actual += result;
 788                 }
 789         } else {
 790                 fRcvZero = 1;
 791         }
 792
 793         /*-------------------------------------------------------------*/
 794         /* End confirmation */
 795         if (req->req.actual == req->req.length) {
 796                 if ((req->req.actual % EP0_PACKETSIZE) == 0) {
 797                         if (req->zero) {
 798                                 req->zero = false;
 799                                 EP0_receive_NULL(udc, FALSE);
 800                                 return 1;
 801                         }
 802                 }
 803
 804                 return 0;               /* Transfer End */
 805         }
 806
 807         if ((req->req.actual % EP0_PACKETSIZE) != 0)
 808                 return 0;               /* Short Packet Transfer End */
 809
 810         if (req->req.actual > req->req.length) {
 811                 dev_err(udc->dev, " *** Overrun Error\n");
 812                 return -EOVERFLOW;
 813         }
 814
 815         if (fRcvZero != 0) {
 816                 iRemainSize = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
 817                 if (iRemainSize & EP0_ONAK) {
 818                         /*---------------------------------------------------*/
 819                         /* NACK release */
 820                         _nbu2ss_bitclr(&udc->p_regs->EP0_CONTROL, EP0_ONAK);
 821                 }
 822                 result = 1;
 823         }
 824
 825         return result;
 826 }
 827
 828 /*-------------------------------------------------------------------------*/
 829 static int _nbu2ss_out_dma(
 830         struct nbu2ss_udc *udc,
 831         struct nbu2ss_req *req,
 832         u32             num,
 833         u32             length
 834 )
 835 {
 836         u8              *pBuffer;
 837         u32             mpkt;
 838         u32             lmpkt;
 839         u32             dmacnt;
 840         u32             burst = 1;
 841         u32             data;
 842         int             result = -EINVAL;
 843         struct fc_regs  *preg = udc->p_regs;
 844
 845         if (req->dma_flag)
 846                 return 1;               /* DMA is forwarded */
 847
 848         req->dma_flag = TRUE;
 849         pBuffer = (u8 *)req->req.dma;
 850         pBuffer += req->req.actual;
 851
 852         /* DMA Address */
 853         _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)pBuffer);
 854
 855         /* Number of transfer packets */
 856         mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPn_MPKT;
 857         dmacnt = (length / mpkt);
 858         lmpkt = (length % mpkt) & ~(u32)0x03;
 859
 860         if (DMA_MAX_COUNT < dmacnt) {
 861                 dmacnt = DMA_MAX_COUNT;
 862                 lmpkt = 0;
 863         } else if (0 != lmpkt) {
 864                 if (0 == dmacnt)
 865                         burst = 0;      /* Burst OFF */
 866                 dmacnt++;
 867         }
 868
 869         data = mpkt | (lmpkt << 16);
 870         _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data);
 871
 872         data = ((dmacnt & 0xff) << 16) | DCR1_EPn_DIR0 | DCR1_EPn_REQEN;
 873         _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data);
 874
 875         if (0 == burst) {
 876                 _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, 0);
 877                 _nbu2ss_bitclr(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_BURST_SET);
 878         } else {
 879                 _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT
 880                                 , (dmacnt << 16));
 881                 _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_BURST_SET);
 882         }
 883         _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_DMA_EN);
 884
 885         result = length & ~(u32)0x03;
 886         req->div_len = result;
 887
 888         return result;
 889 }
 890
 891 /*-------------------------------------------------------------------------*/
 892 static int _nbu2ss_epn_out_pio(
 893         struct nbu2ss_udc *udc,
 894         struct nbu2ss_ep *ep,
 895         struct nbu2ss_req *req,
 896         u32             length
 897 )
 898 {
 899         u8              *pBuffer;
 900         u32             i;
 901         u32             data;
 902         u32             iWordLength;
 903         union usb_reg_access    Temp32;
 904         union usb_reg_access    *pBuf32;
 905         int             result = 0;
 906         struct fc_regs  *preg = udc->p_regs;
 907
 908         if (req->dma_flag)
 909                 return 1;               /* DMA is forwarded */
 910
 911         if (length == 0)
 912                 return 0;
 913
 914         pBuffer = (u8 *)req->req.buf;
 915         pBuf32 = (union usb_reg_access *)(pBuffer + req->req.actual);
 916
 917         iWordLength = length / sizeof(u32);
 918         if (iWordLength > 0) {
 919                 /*---------------------------------------------------------*/
 920                 /* Copy of every four bytes */
 921                 for (i = 0; i < iWordLength; i++) {
 922                         pBuf32->dw =
 923                         _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_READ);
 924                         pBuf32++;
 925                 }
 926                 result = iWordLength * sizeof(u32);
 927         }
 928
 929         data = length - result;
 930         if (data > 0) {
 931                 /*---------------------------------------------------------*/
 932                 /* Copy of fraction byte */
 933                 Temp32.dw = _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_READ);
 934                 for (i = 0 ; i < data ; i++)
 935                         pBuf32->byte.DATA[i] = Temp32.byte.DATA[i];
 936                 result += data;
 937         }
 938
 939         req->req.actual += result;
 940
 941         if ((req->req.actual == req->req.length)
 942                         || ((req->req.actual % ep->ep.maxpacket) != 0)) {
 943
 944                 result = 0;
 945         }
 946
 947         return result;
 948 }
 949
 950 /*-------------------------------------------------------------------------*/
 951 static int _nbu2ss_epn_out_data(
 952         struct nbu2ss_udc *udc,
 953         struct nbu2ss_ep *ep,
 954         struct nbu2ss_req *req,
 955         u32             data_size
 956 )
 957 {
 958         u32             num;
 959         u32             iBufSize;
 960         int             nret = 1;
 961
 962         if (ep->epnum == 0)
 963                 return -EINVAL;
 964
 965         num = ep->epnum - 1;
 966
 967         iBufSize = min((req->req.length - req->req.actual), data_size);
 968
 969         if ((ep->ep_type != USB_ENDPOINT_XFER_INT)
 970                 && (req->req.dma != 0)
 971                 && (iBufSize  >= sizeof(u32))) {
 972                 nret = _nbu2ss_out_dma(udc, req, num, iBufSize);
 973         } else {
 974                 iBufSize = min_t(u32, iBufSize, ep->ep.maxpacket);
 975                 nret = _nbu2ss_epn_out_pio(udc, ep, req, iBufSize);
 976         }
 977
 978         return nret;
 979 }
 980
 981 /*-------------------------------------------------------------------------*/
 982 static int _nbu2ss_epn_out_transfer(
 983         struct nbu2ss_udc *udc,
 984         struct nbu2ss_ep *ep,
 985         struct nbu2ss_req *req
 986 )
 987 {
 988         u32             num;
 989         u32             iRecvLength;
 990         int             result = 1;
 991         struct fc_regs  *preg = udc->p_regs;
 992
 993         if (ep->epnum == 0)
 994                 return -EINVAL;
 995
 996         num = ep->epnum - 1;
 997
 998         /*-------------------------------------------------------------*/
 999         /* Receive Length */
1000         iRecvLength
1001                 = _nbu2ss_readl(&preg->EP_REGS[num].EP_LEN_DCNT) & EPn_LDATA;
1002
1003         if (iRecvLength != 0) {
1004                 result = _nbu2ss_epn_out_data(udc, ep, req, iRecvLength);
1005                 if (iRecvLength < ep->ep.maxpacket) {
1006                         if (iRecvLength == result) {
1007                                 req->req.actual += result;
1008                                 result = 0;
1009                         }
1010                 }
1011         } else {
1012                 if ((req->req.actual == req->req.length)
1013                         || ((req->req.actual % ep->ep.maxpacket) != 0)) {
1014
1015                         result = 0;
1016                 }
1017         }
1018
1019         if (result == 0) {
1020                 if ((req->req.actual % ep->ep.maxpacket) == 0) {
1021                         if (req->zero) {
1022                                 req->zero = false;
1023                                 return 1;
1024                         }
1025                 }
1026         }
1027
1028         if (req->req.actual > req->req.length) {
1029                 dev_err(udc->dev, " Overrun Error\n");
1030                 dev_err(udc->dev, " actual = %d, length = %d\n",
1031                         req->req.actual, req->req.length);
1032                 result = -EOVERFLOW;
1033         }
1034
1035         return result;
1036 }
1037
1038 /*-------------------------------------------------------------------------*/
1039 static int _nbu2ss_in_dma(
1040         struct nbu2ss_udc *udc,
1041         struct nbu2ss_ep *ep,
1042         struct nbu2ss_req *req,
1043         u32             num,
1044         u32             length
1045 )
1046 {
1047         u8              *pBuffer;
1048         u32             mpkt;           /* MaxPacketSize */
1049         u32             lmpkt;          /* Last Packet Data Size */
1050         u32             dmacnt;         /* IN Data Size */
1051         u32             iWriteLength;
1052         u32             data;
1053         int             result = -EINVAL;
1054         struct fc_regs  *preg = udc->p_regs;
1055
1056         if (req->dma_flag)
1057                 return 1;               /* DMA is forwarded */
1058
1059 #ifdef USE_DMA
1060         if (req->req.actual == 0)
1061                 _nbu2ss_dma_map_single(udc, ep, req, USB_DIR_IN);
1062 #endif
1063         req->dma_flag = TRUE;
1064
1065         /* MAX Packet Size */
1066         mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPn_MPKT;
1067
1068         if ((DMA_MAX_COUNT * mpkt) < length)
1069                 iWriteLength = DMA_MAX_COUNT * mpkt;
1070         else
1071                 iWriteLength = length;
1072
1073         /*------------------------------------------------------------*/
1074         /* Number of transmission packets */
1075         if (mpkt < iWriteLength) {
1076                 dmacnt = iWriteLength / mpkt;
1077                 lmpkt  = (iWriteLength % mpkt) & ~(u32)0x3;
1078                 if (lmpkt != 0)
1079                         dmacnt++;
1080                 else
1081                         lmpkt = mpkt & ~(u32)0x3;
1082
1083         } else {
1084                 dmacnt = 1;
1085                 lmpkt  = iWriteLength & ~(u32)0x3;
1086         }
1087
1088         /* Packet setting */
1089         data = mpkt | (lmpkt << 16);
1090         _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data);
1091
1092         /* Address setting */
1093         pBuffer = (u8 *)req->req.dma;
1094         pBuffer += req->req.actual;
1095         _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)pBuffer);
1096
1097         /* Packet and DMA setting */
1098         data = ((dmacnt & 0xff) << 16) | DCR1_EPn_REQEN;
1099         _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data);
1100
1101         /* Packet setting of EPC */
1102         data = dmacnt << 16;
1103         _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, data);
1104
1105         /*DMA setting of EPC */
1106         _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_DMA_EN);
1107
1108         result = iWriteLength & ~(u32)0x3;
1109         req->div_len = result;
1110
1111         return result;
1112 }
1113
1114 /*-------------------------------------------------------------------------*/
1115 static int _nbu2ss_epn_in_pio(
1116         struct nbu2ss_udc *udc,
1117         struct nbu2ss_ep *ep,
1118         struct nbu2ss_req *req,
1119         u32             length
1120 )
1121 {
1122         u8              *pBuffer;
1123         u32             i;
1124         u32             data;
1125         u32             iWordLength;
1126         union usb_reg_access    Temp32;
1127         union usb_reg_access    *pBuf32 = NULL;
1128         int             result = 0;
1129         struct fc_regs  *preg = udc->p_regs;
1130
1131         if (req->dma_flag)
1132                 return 1;               /* DMA is forwarded */
1133
1134         if (length > 0) {
1135                 pBuffer = (u8 *)req->req.buf;
1136                 pBuf32 = (union usb_reg_access *)(pBuffer + req->req.actual);
1137
1138                 iWordLength = length / sizeof(u32);
1139                 if (iWordLength > 0) {
1140                         for (i = 0; i < iWordLength; i++) {
1141                                 _nbu2ss_writel(
1142                                         &preg->EP_REGS[ep->epnum-1].EP_WRITE
1143                                         , pBuf32->dw
1144                                 );
1145
1146                                 pBuf32++;
1147                         }
1148                         result = iWordLength * sizeof(u32);
1149                 }
1150         }
1151
1152         if (result != ep->ep.maxpacket) {
1153                 data = length - result;
1154                 Temp32.dw = 0;
1155                 for (i = 0 ; i < data ; i++)
1156                         Temp32.byte.DATA[i] = pBuf32->byte.DATA[i];
1157
1158                 _nbu2ss_ep_in_end(udc, ep->epnum, Temp32.dw, data);
1159                 result += data;
1160         }
1161
1162         req->div_len = result;
1163
1164         return result;
1165 }
1166
1167 /*-------------------------------------------------------------------------*/
1168 static int _nbu2ss_epn_in_data(
1169         struct nbu2ss_udc *udc,
1170         struct nbu2ss_ep *ep,
1171         struct nbu2ss_req *req,
1172         u32             data_size
1173 )
1174 {
1175         u32             num;
1176         int             nret = 1;
1177
1178         if (ep->epnum == 0)
1179                 return -EINVAL;
1180
1181         num = ep->epnum - 1;
1182
1183         if ((ep->ep_type != USB_ENDPOINT_XFER_INT)
1184                 && (req->req.dma != 0)
1185                 && (data_size >= sizeof(u32))) {
1186                 nret = _nbu2ss_in_dma(udc, ep, req, num, data_size);
1187         } else {
1188                 data_size = min_t(u32, data_size, ep->ep.maxpacket);
1189                 nret = _nbu2ss_epn_in_pio(udc, ep, req, data_size);
1190         }
1191
1192         return nret;
1193 }
1194
1195 /*-------------------------------------------------------------------------*/
1196 static int _nbu2ss_epn_in_transfer(
1197         struct nbu2ss_udc *udc,
1198         struct nbu2ss_ep *ep,
1199         struct nbu2ss_req *req
1200 )
1201 {
1202         u32             num;
1203         u32             iBufSize;
1204         int             result = 0;
1205         u32             status;
1206
1207         if (ep->epnum == 0)
1208                 return -EINVAL;
1209
1210         num = ep->epnum - 1;
1211
1212         status = _nbu2ss_readl(&udc->p_regs->EP_REGS[num].EP_STATUS);
1213
1214         /*-------------------------------------------------------------*/
1215         /* State confirmation of FIFO */
1216         if (req->req.actual == 0) {
1217                 if ((status & EPn_IN_EMPTY) == 0)
1218                         return 1;       /* Not Empty */
1219
1220         } else {
1221                 if ((status & EPn_IN_FULL) != 0)
1222                         return 1;       /* Not Empty */
1223         }
1224
1225         /*-------------------------------------------------------------*/
1226         /* Start tranfer */
1227         iBufSize = req->req.length - req->req.actual;
1228         if (iBufSize > 0)
1229                 result = _nbu2ss_epn_in_data(udc, ep, req, iBufSize);
1230         else if (req->req.length == 0)
1231                 _nbu2ss_zero_len_pkt(udc, ep->epnum);
1232
1233         return result;
1234 }
1235
1236 /*-------------------------------------------------------------------------*/
1237 static int _nbu2ss_start_transfer(
1238         struct nbu2ss_udc *udc,
1239         struct nbu2ss_ep *ep,
1240         struct nbu2ss_req *req,
1241         bool    bflag)
1242 {
1243         int             nret = -EINVAL;
1244
1245         req->dma_flag = FALSE;
1246         req->div_len = 0;
1247
1248         if (req->req.length == 0)
1249                 req->zero = false;
1250         else {
1251                 if ((req->req.length % ep->ep.maxpacket) == 0)
1252                         req->zero = req->req.zero;
1253                 else
1254                         req->zero = false;
1255         }
1256
1257         if (ep->epnum == 0) {
1258                 /* EP0 */
1259                 switch (udc->ep0state) {
1260                 case EP0_IN_DATA_PHASE:
1261                         nret = _nbu2ss_ep0_in_transfer(udc, ep, req);
1262                         break;
1263
1264                 case EP0_OUT_DATA_PHASE:
1265                         nret = _nbu2ss_ep0_out_transfer(udc, ep, req);
1266                         break;
1267
1268                 case EP0_IN_STATUS_PHASE:
1269                         nret = EP0_send_NULL(udc, TRUE);
1270                         break;
1271
1272                 default:
1273                         break;
1274                 }
1275
1276         } else {
1277                 /* EPn */
1278                 if (ep->direct == USB_DIR_OUT) {
1279                         /* OUT */
1280                         if (bflag == FALSE)
1281                                 nret = _nbu2ss_epn_out_transfer(udc, ep, req);
1282                 } else {
1283                         /* IN */
1284                         nret = _nbu2ss_epn_in_transfer(udc, ep, req);
1285                 }
1286         }
1287
1288         return nret;
1289 }
1290
1291 /*-------------------------------------------------------------------------*/
1292 static void _nbu2ss_restert_transfer(struct nbu2ss_ep *ep)
1293 {
1294         u32             length;
1295         bool    bflag = FALSE;
1296         struct nbu2ss_req *req;
1297
1298         if (list_empty(&ep->queue))
1299                 req = NULL;
1300         else
1301                 req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
1302
1303         if (req == NULL)
1304                 return;
1305
1306         if (ep->epnum > 0) {
1307                 length = _nbu2ss_readl(
1308                         &ep->udc->p_regs->EP_REGS[ep->epnum-1].EP_LEN_DCNT);
1309
1310                 length &= EPn_LDATA;
1311                 if (length < ep->ep.maxpacket)
1312                         bflag = TRUE;
1313         }
1314
1315         _nbu2ss_start_transfer(ep->udc, ep, req, bflag);
1316 }
1317
1318 /*-------------------------------------------------------------------------*/
1319 /*      Endpoint Toggle Reset */
1320 static void _nbu2ss_endpoint_toggle_reset(
1321         struct nbu2ss_udc *udc,
1322         u8 ep_adrs)
1323 {
1324         u8              num;
1325         u32             data;
1326
1327         if ((ep_adrs == 0) || (ep_adrs == 0x80))
1328                 return;
1329
1330         num = (ep_adrs & 0x7F) - 1;
1331
1332         if (ep_adrs & USB_DIR_IN)
1333                 data = EPn_IPIDCLR;
1334         else
1335                 data = EPn_BCLR | EPn_OPIDCLR;
1336
1337         _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
1338 }
1339
1340 /*-------------------------------------------------------------------------*/
1341 /*      Endpoint STALL set */
1342 static void _nbu2ss_set_endpoint_stall(
1343         struct nbu2ss_udc *udc,
1344         u8 ep_adrs,
1345         bool bstall)
1346 {
1347         u8              num, epnum;
1348         u32             data;
1349         struct nbu2ss_ep *ep;
1350         struct fc_regs  *preg = udc->p_regs;
1351
1352         if ((ep_adrs == 0) || (ep_adrs == 0x80)) {
1353                 if (bstall) {
1354                         /* Set STALL */
1355                         _nbu2ss_bitset(&preg->EP0_CONTROL, EP0_STL);
1356                 } else {
1357                         /* Clear STALL */
1358                         _nbu2ss_bitclr(&preg->EP0_CONTROL, EP0_STL);
1359                 }
1360         } else {
1361                 epnum = ep_adrs & USB_ENDPOINT_NUMBER_MASK;
1362                 num = epnum - 1;
1363                 ep = &udc->ep[epnum];
1364
1365                 if (bstall) {
1366                         /* Set STALL */
1367                         ep->halted = TRUE;
1368
1369                         if (ep_adrs & USB_DIR_IN)
1370                                 data = EPn_BCLR | EPn_ISTL;
1371                         else
1372                                 data = EPn_OSTL_EN | EPn_OSTL;
1373
1374                         _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, data);
1375                 } else {
1376                         /* Clear STALL */
1377                         ep->stalled = FALSE;
1378                         if (ep_adrs & USB_DIR_IN) {
1379                                 _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL
1380                                                 , EPn_ISTL);
1381                         } else {
1382                                 data =
1383                                 _nbu2ss_readl(&preg->EP_REGS[num].EP_CONTROL);
1384
1385                                 data &= ~EPn_OSTL;
1386                                 data |= EPn_OSTL_EN;
1387
1388                                 _nbu2ss_writel(&preg->EP_REGS[num].EP_CONTROL
1389                                                 , data);
1390                         }
1391
1392                         ep->stalled = FALSE;
1393                         if (ep->halted) {
1394                                 ep->halted = FALSE;
1395                                 _nbu2ss_restert_transfer(ep);
1396                         }
1397                 }
1398         }
1399 }
1400
1401
1402 /*-------------------------------------------------------------------------*/
1403 /* Device Descriptor */
1404 static struct usb_device_descriptor device_desc = {
1405         .bLength              = sizeof(device_desc),
1406         .bDescriptorType      = USB_DT_DEVICE,
1407         .bcdUSB               = cpu_to_le16(0x0200),
1408         .bDeviceClass         = USB_CLASS_VENDOR_SPEC,
1409         .bDeviceSubClass      = 0x00,
1410         .bDeviceProtocol      = 0x00,
1411         .bMaxPacketSize0      = 64,
1412         .idVendor             = cpu_to_le16(0x0409),
1413         .idProduct            = cpu_to_le16(0xfff0),
1414         .bcdDevice            = 0xffff,
1415         .iManufacturer        = 0x00,
1416         .iProduct             = 0x00,
1417         .iSerialNumber        = 0x00,
1418         .bNumConfigurations   = 0x01,
1419 };
1420
1421 /*-------------------------------------------------------------------------*/
1422 static void _nbu2ss_set_test_mode(struct nbu2ss_udc *udc, u32 mode)
1423 {
1424         u32             data;
1425
1426         if (mode > MAX_TEST_MODE_NUM)
1427                 return;
1428
1429         dev_info(udc->dev, "SET FEATURE : test mode = %d\n", mode);
1430
1431         data = _nbu2ss_readl(&udc->p_regs->USB_CONTROL);
1432         data &= ~TEST_FORCE_ENABLE;
1433         data |= mode << TEST_MODE_SHIFT;
1434
1435         _nbu2ss_writel(&udc->p_regs->USB_CONTROL, data);
1436         _nbu2ss_bitset(&udc->p_regs->TEST_CONTROL, CS_TESTMODEEN);
1437 }
1438
1439 /*-------------------------------------------------------------------------*/
1440 static int _nbu2ss_set_feature_device(
1441         struct nbu2ss_udc *udc,
1442         u16 selector,
1443         u16 wIndex
1444 )
1445 {
1446         int     result = -EOPNOTSUPP;
1447
1448         switch (selector) {
1449         case USB_DEVICE_REMOTE_WAKEUP:
1450                 if (0x0000 == wIndex) {
1451                         udc->remote_wakeup = U2F_ENABLE;
1452                         result = 0;
1453                 }
1454                 break;
1455
1456         case USB_DEVICE_TEST_MODE:
1457                 wIndex >>= 8;
1458                 if (wIndex <= MAX_TEST_MODE_NUM)
1459                         result = 0;
1460                 break;
1461
1462         default:
1463                 break;
1464         }
1465
1466         return result;
1467 }
1468
1469 /*-------------------------------------------------------------------------*/
1470 static int _nbu2ss_get_ep_stall(struct nbu2ss_udc *udc, u8 ep_adrs)
1471 {
1472         u8              epnum;
1473         u32             data = 0, bit_data;
1474         struct fc_regs  *preg = udc->p_regs;
1475
1476         epnum = ep_adrs & ~USB_ENDPOINT_DIR_MASK;
1477         if (epnum == 0) {
1478                 data = _nbu2ss_readl(&preg->EP0_CONTROL);
1479                 bit_data = EP0_STL;
1480
1481         } else {
1482                 data = _nbu2ss_readl(&preg->EP_REGS[epnum-1].EP_CONTROL);
1483                 if ((data & EPn_EN) == 0)
1484                         return -1;
1485
1486                 if (ep_adrs & USB_ENDPOINT_DIR_MASK)
1487                         bit_data = EPn_ISTL;
1488                 else
1489                         bit_data = EPn_OSTL;
1490         }
1491
1492         if ((data & bit_data) == 0)
1493                 return 0;
1494         return 1;
1495 }
1496
1497 /*-------------------------------------------------------------------------*/
1498 static inline int _nbu2ss_req_feature(struct nbu2ss_udc *udc, bool bset)
1499 {
1500         u8      recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK);
1501         u8      direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN);
1502         u16     selector  = udc->ctrl.wValue;
1503         u16     wIndex    = udc->ctrl.wIndex;
1504         u8      ep_adrs;
1505         int     result = -EOPNOTSUPP;
1506
1507         if ((0x0000 != udc->ctrl.wLength) ||
1508                         (USB_DIR_OUT != direction)) {
1509                 return -EINVAL;
1510         }
1511
1512         switch (recipient) {
1513         case USB_RECIP_DEVICE:
1514                 if (bset)
1515                         result =
1516                         _nbu2ss_set_feature_device(udc, selector, wIndex);
1517                 break;
1518
1519         case USB_RECIP_ENDPOINT:
1520                 if (0x0000 == (wIndex & 0xFF70)) {
1521                         if (USB_ENDPOINT_HALT == selector) {
1522                                 ep_adrs = wIndex & 0xFF;
1523                                 if (bset == FALSE) {
1524                                         _nbu2ss_endpoint_toggle_reset(
1525                                                 udc, ep_adrs);
1526                                 }
1527
1528                                 _nbu2ss_set_endpoint_stall(
1529                                         udc, ep_adrs, bset);
1530
1531                                 result = 0;
1532                         }
1533                 }
1534                 break;
1535
1536         default:
1537                 break;
1538         }
1539
1540         if (result >= 0)
1541                 _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, 0);
1542
1543         return result;
1544 }
1545
1546 /*-------------------------------------------------------------------------*/
1547 static inline enum usb_device_speed _nbu2ss_get_speed(struct nbu2ss_udc *udc)
1548 {
1549         u32             data;
1550         enum usb_device_speed speed = USB_SPEED_FULL;
1551
1552         data = _nbu2ss_readl(&udc->p_regs->USB_STATUS);
1553         if (data & HIGH_SPEED)
1554                 speed = USB_SPEED_HIGH;
1555
1556         return speed;
1557 }
1558
1559 /*-------------------------------------------------------------------------*/
1560 static void _nbu2ss_epn_set_stall(
1561         struct nbu2ss_udc *udc,
1562         struct nbu2ss_ep *ep
1563 )
1564 {
1565         u8      ep_adrs;
1566         u32     regdata;
1567         int     limit_cnt = 0;
1568
1569         struct fc_regs  *preg = udc->p_regs;
1570
1571         if (ep->direct == USB_DIR_IN) {
1572                 for (limit_cnt = 0
1573                         ; limit_cnt < IN_DATA_EMPTY_COUNT
1574                         ; limit_cnt++) {
1575
1576                         regdata = _nbu2ss_readl(
1577                                 &preg->EP_REGS[ep->epnum-1].EP_STATUS);
1578
1579                         if ((regdata & EPn_IN_DATA) == 0)
1580                                 break;
1581
1582                         mdelay(1);
1583                 }
1584         }
1585
1586         ep_adrs = ep->epnum | ep->direct;
1587         _nbu2ss_set_endpoint_stall(udc, ep_adrs, 1);
1588 }
1589
1590 /*-------------------------------------------------------------------------*/
1591 static int std_req_get_status(struct nbu2ss_udc *udc)
1592 {
1593         u32     length;
1594         u16     status_data = 0;
1595         u8      recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK);
1596         u8      direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN);
1597         u8      ep_adrs;
1598         int     result = -EINVAL;
1599
1600         if ((0x0000 != udc->ctrl.wValue)
1601                 || (USB_DIR_IN != direction)) {
1602
1603                 return result;
1604         }
1605
1606         length = min_t(u16, udc->ctrl.wLength, sizeof(status_data));
1607
1608         switch (recipient) {
1609         case USB_RECIP_DEVICE:
1610                 if (udc->ctrl.wIndex == 0x0000) {
1611                         if (udc->gadget.is_selfpowered)
1612                                 status_data |= (1 << USB_DEVICE_SELF_POWERED);
1613
1614                         if (udc->remote_wakeup)
1615                                 status_data |= (1 << USB_DEVICE_REMOTE_WAKEUP);
1616
1617                         result = 0;
1618                 }
1619                 break;
1620
1621         case USB_RECIP_ENDPOINT:
1622                 if (0x0000 == (udc->ctrl.wIndex & 0xFF70)) {
1623                         ep_adrs = (u8)(udc->ctrl.wIndex & 0xFF);
1624                         result = _nbu2ss_get_ep_stall(udc, ep_adrs);
1625
1626                         if (result > 0)
1627                                 status_data |= (1 << USB_ENDPOINT_HALT);
1628                 }
1629                 break;
1630
1631         default:
1632                 break;
1633         }
1634
1635         if (result >= 0) {
1636                 memcpy(udc->ep0_buf, &status_data, length);
1637                 _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, length);
1638                 _nbu2ss_ep0_in_transfer(udc, &udc->ep[0], &udc->ep0_req);
1639
1640         } else {
1641                 dev_err(udc->dev, " Error GET_STATUS\n");
1642         }
1643
1644         return result;
1645 }
1646
1647 /*-------------------------------------------------------------------------*/
1648 static int std_req_clear_feature(struct nbu2ss_udc *udc)
1649 {
1650         return _nbu2ss_req_feature(udc, FALSE);
1651 }
1652
1653 /*-------------------------------------------------------------------------*/
1654 static int std_req_set_feature(struct nbu2ss_udc *udc)
1655 {
1656         return _nbu2ss_req_feature(udc, TRUE);
1657 }
1658
1659 /*-------------------------------------------------------------------------*/
1660 static int std_req_set_address(struct nbu2ss_udc *udc)
1661 {
1662         int             result = 0;
1663         u32             wValue = udc->ctrl.wValue;
1664
1665         if ((0x00 != udc->ctrl.bRequestType)    ||
1666                 (0x0000 != udc->ctrl.wIndex)    ||
1667                 (0x0000 != udc->ctrl.wLength)) {
1668                 return -EINVAL;
1669         }
1670
1671         if (wValue != (wValue & 0x007F))
1672                 return -EINVAL;
1673
1674         wValue <<= USB_ADRS_SHIFT;
1675
1676         _nbu2ss_writel(&udc->p_regs->USB_ADDRESS, wValue);
1677         _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, 0);
1678
1679         return result;
1680 }
1681
1682 /*-------------------------------------------------------------------------*/
1683 static int std_req_set_configuration(struct nbu2ss_udc *udc)
1684 {
1685         u32 ConfigValue = (u32)(udc->ctrl.wValue & 0x00ff);
1686
1687         if ((0x0000 != udc->ctrl.wIndex)        ||
1688                 (0x0000 != udc->ctrl.wLength)   ||
1689                 (0x00 != udc->ctrl.bRequestType)) {
1690                 return -EINVAL;
1691         }
1692
1693         udc->curr_config = ConfigValue;
1694
1695         if (ConfigValue > 0) {
1696                 _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, CONF);
1697                 udc->devstate = USB_STATE_CONFIGURED;
1698
1699         } else {
1700                 _nbu2ss_bitclr(&udc->p_regs->USB_CONTROL, CONF);
1701                 udc->devstate = USB_STATE_ADDRESS;
1702         }
1703
1704         return 0;
1705 }
1706
1707 /*-------------------------------------------------------------------------*/
1708 static inline void _nbu2ss_read_request_data(struct nbu2ss_udc *udc, u32 *pdata)
1709 {
1710         if ((udc == NULL) && (pdata == NULL))
1711                 return;
1712
1713         *pdata = _nbu2ss_readl(&udc->p_regs->SETUP_DATA0);
1714         pdata++;
1715         *pdata = _nbu2ss_readl(&udc->p_regs->SETUP_DATA1);
1716 }
1717
1718 /*-------------------------------------------------------------------------*/
1719 static inline int _nbu2ss_decode_request(struct nbu2ss_udc *udc)
1720 {
1721         bool                    bcall_back = TRUE;
1722         int                     nret = -EINVAL;
1723         struct usb_ctrlrequest  *p_ctrl;
1724
1725         p_ctrl = &udc->ctrl;
1726         _nbu2ss_read_request_data(udc, (u32 *)p_ctrl);
1727
1728         /* ep0 state control */
1729         if (p_ctrl->wLength == 0) {
1730                 udc->ep0state = EP0_IN_STATUS_PHASE;
1731
1732         } else {
1733                 if (p_ctrl->bRequestType & USB_DIR_IN)
1734                         udc->ep0state = EP0_IN_DATA_PHASE;
1735                 else
1736                         udc->ep0state = EP0_OUT_DATA_PHASE;
1737         }
1738
1739         if ((p_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1740                 switch (p_ctrl->bRequest) {
1741                 case USB_REQ_GET_STATUS:
1742                         nret = std_req_get_status(udc);
1743                         bcall_back = FALSE;
1744                         break;
1745
1746                 case USB_REQ_CLEAR_FEATURE:
1747                         nret = std_req_clear_feature(udc);
1748                         bcall_back = FALSE;
1749                         break;
1750
1751                 case USB_REQ_SET_FEATURE:
1752                         nret = std_req_set_feature(udc);
1753                         bcall_back = FALSE;
1754                         break;
1755
1756                 case USB_REQ_SET_ADDRESS:
1757                         nret = std_req_set_address(udc);
1758                         bcall_back = FALSE;
1759                         break;
1760
1761                 case USB_REQ_SET_CONFIGURATION:
1762                         nret = std_req_set_configuration(udc);
1763                         break;
1764
1765                 default:
1766                         break;
1767                 }
1768         }
1769
1770         if (bcall_back == FALSE) {
1771                 if (udc->ep0state == EP0_IN_STATUS_PHASE) {
1772                         if (nret >= 0) {
1773                                 /*--------------------------------------*/
1774                                 /* Status Stage */
1775                                 nret = EP0_send_NULL(udc, TRUE);
1776                         }
1777                 }
1778
1779         } else {
1780                 spin_unlock(&udc->lock);
1781                 nret = udc->driver->setup(&udc->gadget, &udc->ctrl);
1782                 spin_lock(&udc->lock);
1783         }
1784
1785         if (nret < 0)
1786                 udc->ep0state = EP0_IDLE;
1787
1788         return nret;
1789 }
1790
1791 /*-------------------------------------------------------------------------*/
1792 static inline int _nbu2ss_ep0_in_data_stage(struct nbu2ss_udc *udc)
1793 {
1794         int                     nret;
1795         struct nbu2ss_req       *req;
1796         struct nbu2ss_ep        *ep = &udc->ep[0];
1797
1798         if (list_empty(&ep->queue))
1799                 req = NULL;
1800         else
1801                 req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
1802
1803         if (req == NULL)
1804                 req = &udc->ep0_req;
1805
1806         req->req.actual += req->div_len;
1807         req->div_len = 0;
1808
1809         nret = _nbu2ss_ep0_in_transfer(udc, ep, req);
1810         if (nret == 0) {
1811                 udc->ep0state = EP0_OUT_STATUS_PAHSE;
1812                 EP0_receive_NULL(udc, TRUE);
1813         }
1814
1815         return 0;
1816 }
1817
1818 /*-------------------------------------------------------------------------*/
1819 static inline int _nbu2ss_ep0_out_data_stage(struct nbu2ss_udc *udc)
1820 {
1821         int                     nret;
1822         struct nbu2ss_req       *req;
1823         struct nbu2ss_ep        *ep = &udc->ep[0];
1824
1825         if (list_empty(&ep->queue))
1826                 req = NULL;
1827         else
1828                 req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
1829
1830         if (req == NULL)
1831                 req = &udc->ep0_req;
1832
1833         nret = _nbu2ss_ep0_out_transfer(udc, ep, req);
1834         if (nret == 0) {
1835                 udc->ep0state = EP0_IN_STATUS_PHASE;
1836                 EP0_send_NULL(udc, TRUE);
1837
1838         } else if (nret < 0) {
1839                 _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL, EP0_BCLR);
1840                 req->req.status = nret;
1841         }
1842
1843         return 0;
1844 }
1845
1846 /*-------------------------------------------------------------------------*/
1847 static inline int _nbu2ss_ep0_status_stage(struct nbu2ss_udc *udc)
1848 {
1849         struct nbu2ss_req       *req;
1850         struct nbu2ss_ep        *ep = &udc->ep[0];
1851
1852         if (list_empty(&ep->queue))
1853                 req = NULL;
1854         else
1855                 req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
1856
1857         if (req == NULL) {
1858                 req = &udc->ep0_req;
1859                 if (req->req.complete)
1860                         req->req.complete(&ep->ep, &req->req);
1861
1862         } else {
1863                 if (req->req.complete)
1864                         _nbu2ss_ep_done(ep, req, 0);
1865         }
1866
1867         udc->ep0state = EP0_IDLE;
1868
1869         return 0;
1870 }
1871
1872 /*-------------------------------------------------------------------------*/
1873 static inline void _nbu2ss_ep0_int(struct nbu2ss_udc *udc)
1874 {
1875         int             i;
1876         u32             status;
1877         u32             intr;
1878         int             nret = -1;
1879
1880         status = _nbu2ss_readl(&udc->p_regs->EP0_STATUS);
1881         intr = status & EP0_STATUS_RW_BIT;
1882         _nbu2ss_writel(&udc->p_regs->EP0_STATUS, ~(u32)intr);
1883
1884         status &= (SETUP_INT | EP0_IN_INT | EP0_OUT_INT
1885                         | STG_END_INT | EP0_OUT_NULL_INT);
1886
1887         if (status == 0) {
1888                 dev_info(udc->dev, "%s Not Decode Interrupt\n", __func__);
1889                 dev_info(udc->dev, "EP0_STATUS = 0x%08x\n", intr);
1890                 return;
1891         }
1892
1893         if (udc->gadget.speed == USB_SPEED_UNKNOWN)
1894                 udc->gadget.speed = _nbu2ss_get_speed(udc);
1895
1896         for (i = 0; i < EP0_END_XFER; i++) {
1897                 switch (udc->ep0state) {
1898                 case EP0_IDLE:
1899                         if (status & SETUP_INT) {
1900                                 status = 0;
1901                                 nret = _nbu2ss_decode_request(udc);
1902                         }
1903                         break;
1904
1905                 case EP0_IN_DATA_PHASE:
1906                         if (status & EP0_IN_INT) {
1907                                 status &= ~EP0_IN_INT;
1908                                 nret = _nbu2ss_ep0_in_data_stage(udc);
1909                         }
1910                         break;
1911
1912                 case EP0_OUT_DATA_PHASE:
1913                         if (status & EP0_OUT_INT) {
1914                                 status &= ~EP0_OUT_INT;
1915                                 nret = _nbu2ss_ep0_out_data_stage(udc);
1916                         }
1917                         break;
1918
1919                 case EP0_IN_STATUS_PHASE:
1920                         if ((status & STG_END_INT) || (status & SETUP_INT)) {
1921                                 status &= ~(STG_END_INT | EP0_IN_INT);
1922                                 nret = _nbu2ss_ep0_status_stage(udc);
1923                         }
1924                         break;
1925
1926                 case EP0_OUT_STATUS_PAHSE:
1927                         if ((status & STG_END_INT)
1928                         || (status & SETUP_INT)
1929                         || (status & EP0_OUT_NULL_INT)) {
1930                                 status &= ~(STG_END_INT
1931                                                 | EP0_OUT_INT
1932                                                 | EP0_OUT_NULL_INT);
1933
1934                                 nret = _nbu2ss_ep0_status_stage(udc);
1935                         }
1936
1937                         break;
1938
1939                 default:
1940                         status = 0;
1941                         break;
1942                 }
1943
1944                 if (status == 0)
1945                         break;
1946         }
1947
1948         if (nret < 0) {
1949                 /* Send Stall */
1950                 _nbu2ss_set_endpoint_stall(udc, 0, TRUE);
1951         }
1952 }
1953
1954 /*-------------------------------------------------------------------------*/
1955 static void _nbu2ss_ep_done(
1956         struct nbu2ss_ep *ep,
1957         struct nbu2ss_req *req,
1958         int status)
1959 {
1960         struct nbu2ss_udc *udc = ep->udc;
1961
1962         list_del_init(&req->queue);
1963
1964         if (status == -ECONNRESET)
1965                 _nbu2ss_fifo_flush(udc, ep);
1966
1967         if (likely(req->req.status == -EINPROGRESS))
1968                 req->req.status = status;
1969
1970         if (ep->stalled)
1971                 _nbu2ss_epn_set_stall(udc, ep);
1972         else {
1973                 if (!list_empty(&ep->queue))
1974                         _nbu2ss_restert_transfer(ep);
1975         }
1976
1977 #ifdef USE_DMA
1978         if ((ep->direct == USB_DIR_OUT) && (ep->epnum > 0) &&
1979                         (req->req.dma != 0))
1980                 _nbu2ss_dma_unmap_single(udc, ep, req, USB_DIR_OUT);
1981 #endif
1982
1983         spin_unlock(&udc->lock);
1984         req->req.complete(&ep->ep, &req->req);
1985         spin_lock(&udc->lock);
1986 }
1987
1988 /*-------------------------------------------------------------------------*/
1989 static inline void _nbu2ss_epn_in_int(
1990         struct nbu2ss_udc *udc,
1991         struct nbu2ss_ep *ep,
1992         struct nbu2ss_req *req)
1993 {
1994         int     result = 0;
1995         u32     status;
1996
1997         struct fc_regs  *preg = udc->p_regs;
1998
1999         if (req->dma_flag)
2000                 return;         /* DMA is forwarded */
2001
2002         req->req.actual += req->div_len;
2003         req->div_len = 0;
2004
2005         if (req->req.actual != req->req.length) {
2006                 /*---------------------------------------------------------*/
2007                 /* remainder of data */
2008                 result = _nbu2ss_epn_in_transfer(udc, ep, req);
2009
2010         } else {
2011                 if (req->zero && ((req->req.actual % ep->ep.maxpacket) == 0)) {
2012
2013                         status =
2014                         _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_STATUS);
2015
2016                         if ((status & EPn_IN_FULL) == 0) {
2017                                 /*-----------------------------------------*/
2018                                 /* 0 Length Packet */
2019                                 req->zero = false;
2020                                 _nbu2ss_zero_len_pkt(udc, ep->epnum);
2021                         }
2022                         return;
2023                 }
2024         }
2025
2026         if (result <= 0) {
2027                 /*---------------------------------------------------------*/
2028                 /* Complete */
2029                 _nbu2ss_ep_done(ep, req, result);
2030         }
2031 }
2032
2033 /*-------------------------------------------------------------------------*/
2034 static inline void _nbu2ss_epn_out_int(
2035         struct nbu2ss_udc *udc,
2036         struct nbu2ss_ep *ep,
2037         struct nbu2ss_req *req)
2038 {
2039         int     result;
2040
2041         result = _nbu2ss_epn_out_transfer(udc, ep, req);
2042         if (result <= 0)
2043                 _nbu2ss_ep_done(ep, req, result);
2044 }
2045
2046 /*-------------------------------------------------------------------------*/
2047 static inline void _nbu2ss_epn_in_dma_int(
2048         struct nbu2ss_udc *udc,
2049         struct nbu2ss_ep *ep,
2050         struct nbu2ss_req *req)
2051 {
2052         u32             mpkt;
2053         u32             size;
2054         struct usb_request *preq;
2055
2056         preq = &req->req;
2057
2058         if (req->dma_flag == FALSE)
2059                 return;
2060
2061         preq->actual += req->div_len;
2062         req->div_len = 0;
2063         req->dma_flag = FALSE;
2064
2065 #ifdef USE_DMA
2066         _nbu2ss_dma_unmap_single(udc, ep, req, USB_DIR_IN);
2067 #endif
2068
2069         if (preq->actual != preq->length) {
2070                 _nbu2ss_epn_in_transfer(udc, ep, req);
2071         } else {
2072                 mpkt = ep->ep.maxpacket;
2073                 size = preq->actual % mpkt;
2074                 if (size > 0) {
2075                         if (((preq->actual & 0x03) == 0) && (size < mpkt))
2076                                 _nbu2ss_ep_in_end(udc, ep->epnum, 0, 0);
2077                 } else {
2078                         _nbu2ss_epn_in_int(udc, ep, req);
2079                 }
2080         }
2081 }
2082
2083 /*-------------------------------------------------------------------------*/
2084 static inline void _nbu2ss_epn_out_dma_int(
2085         struct nbu2ss_udc *udc,
2086         struct nbu2ss_ep *ep,
2087         struct nbu2ss_req *req)
2088 {
2089         int             i;
2090         u32             num;
2091         u32             dmacnt, ep_dmacnt;
2092         u32             mpkt;
2093         struct fc_regs  *preg = udc->p_regs;
2094
2095         num = ep->epnum - 1;
2096
2097         if (req->req.actual == req->req.length) {
2098                 if ((req->req.length % ep->ep.maxpacket) && !req->zero) {
2099                         req->div_len = 0;
2100                         req->dma_flag = FALSE;
2101                         _nbu2ss_ep_done(ep, req, 0);
2102                         return;
2103                 }
2104         }
2105
2106         ep_dmacnt = _nbu2ss_readl(&preg->EP_REGS[num].EP_LEN_DCNT)
2107                  & EPn_DMACNT;
2108         ep_dmacnt >>= 16;
2109
2110         for (i = 0; i < EPC_PLL_LOCK_COUNT; i++) {
2111                 dmacnt = _nbu2ss_readl(&preg->EP_DCR[num].EP_DCR1)
2112                          & DCR1_EPn_DMACNT;
2113                 dmacnt >>= 16;
2114                 if (ep_dmacnt == dmacnt)
2115                         break;
2116         }
2117
2118         _nbu2ss_bitclr(&preg->EP_DCR[num].EP_DCR1, DCR1_EPn_REQEN);
2119
2120         if (dmacnt != 0) {
2121                 mpkt = ep->ep.maxpacket;
2122                 if ((req->div_len % mpkt) == 0)
2123                         req->div_len -= mpkt * dmacnt;
2124         }
2125
2126         if ((req->req.actual % ep->ep.maxpacket) > 0) {
2127                 if (req->req.actual == req->div_len) {
2128                         req->div_len = 0;
2129                         req->dma_flag = FALSE;
2130                         _nbu2ss_ep_done(ep, req, 0);
2131                         return;
2132                 }
2133         }
2134
2135         req->req.actual += req->div_len;
2136         req->div_len = 0;
2137         req->dma_flag = FALSE;
2138
2139         _nbu2ss_epn_out_int(udc, ep, req);
2140 }
2141
2142 /*-------------------------------------------------------------------------*/
2143 static inline void _nbu2ss_epn_int(struct nbu2ss_udc *udc, u32 epnum)
2144 {
2145         u32     num;
2146         u32     status;
2147
2148         struct nbu2ss_req       *req;
2149         struct nbu2ss_ep        *ep = &udc->ep[epnum];
2150
2151         num = epnum - 1;
2152
2153         /* Interrupt Status */
2154         status = _nbu2ss_readl(&udc->p_regs->EP_REGS[num].EP_STATUS);
2155
2156         /* Interrupt Clear */
2157         _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_STATUS, ~(u32)status);
2158
2159         if (list_empty(&ep->queue))
2160                 req = NULL;
2161         else
2162                 req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
2163
2164         if (req == NULL) {
2165                 /* pr_warn("=== %s(%d) req == NULL\n", __func__, epnum); */
2166                 return;
2167         }
2168
2169         if (status & EPn_OUT_END_INT) {
2170                 status &= ~EPn_OUT_INT;
2171                 _nbu2ss_epn_out_dma_int(udc, ep, req);
2172         }
2173
2174         if (status & EPn_OUT_INT)
2175                 _nbu2ss_epn_out_int(udc, ep, req);
2176
2177         if (status & EPn_IN_END_INT) {
2178                 status &= ~EPn_IN_INT;
2179                 _nbu2ss_epn_in_dma_int(udc, ep, req);
2180         }
2181
2182         if (status & EPn_IN_INT)
2183                 _nbu2ss_epn_in_int(udc, ep, req);
2184 }
2185
2186 /*-------------------------------------------------------------------------*/
2187 static inline void _nbu2ss_ep_int(struct nbu2ss_udc *udc, u32 epnum)
2188 {
2189         if (epnum == 0)
2190                 _nbu2ss_ep0_int(udc);
2191         else
2192                 _nbu2ss_epn_int(udc, epnum);
2193 }
2194
2195 /*-------------------------------------------------------------------------*/
2196 static void _nbu2ss_ep0_enable(struct nbu2ss_udc *udc)
2197 {
2198         _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL, (EP0_AUTO | EP0_BCLR));
2199         _nbu2ss_writel(&udc->p_regs->EP0_INT_ENA, EP0_INT_EN_BIT);
2200 }
2201
2202 #if 0
2203 /*-------------------------------------------------------------------------*/
2204 static void _nbu2ss_ep0_disable(struct nbu2ss_udc *udc)
2205 {
2206         _nbu2ss_bitclr(&udc->p_regs->EP0_INT_ENA, EP0_INT_EN_BIT);
2207
2208         _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL
2209                         , (EP0_BCLR | EP0_INAK | EP0_ONAK | EP0_BCLR));
2210
2211         _nbu2ss_bitclr(&udc->p_regs->EP0_CONTROL, EP0_AUTO);
2212 }
2213 #endif
2214
2215 /*-------------------------------------------------------------------------*/
2216 static int _nbu2ss_nuke(struct nbu2ss_udc *udc,
2217                         struct nbu2ss_ep *ep,
2218                         int status)
2219 {
2220         struct nbu2ss_req *req;
2221
2222         /* Endpoint Disable */
2223         _nbu2ss_epn_exit(udc, ep);
2224
2225         /* DMA Disable */
2226         _nbu2ss_ep_dma_exit(udc, ep);
2227
2228         if (list_empty(&ep->queue))
2229                 return 0;
2230
2231         /* called with irqs blocked */
2232         list_for_each_entry(req, &ep->queue, queue) {
2233                 _nbu2ss_ep_done(ep, req, status);
2234         }
2235
2236         return 0;
2237 }
2238
2239 /*-------------------------------------------------------------------------*/
2240 static void _nbu2ss_quiesce(struct nbu2ss_udc *udc)
2241 {
2242         struct nbu2ss_ep        *ep;
2243
2244         udc->gadget.speed = USB_SPEED_UNKNOWN;
2245
2246         _nbu2ss_nuke(udc, &udc->ep[0], -ESHUTDOWN);
2247
2248         /* Endpoint n */
2249         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2250                 _nbu2ss_nuke(udc, ep, -ESHUTDOWN);
2251         }
2252 }
2253
2254 /*-------------------------------------------------------------------------*/
2255 static int _nbu2ss_pullup(struct nbu2ss_udc *udc, int is_on)
2256 {
2257         u32     reg_dt;
2258
2259         if (udc->vbus_active == 0)
2260                 return -ESHUTDOWN;
2261
2262         if (is_on) {
2263                 /* D+ Pullup */
2264 /*              INFO(" --- D+ Pullup\n"); */
2265
2266                 if (udc->driver) {
2267                         reg_dt = (_nbu2ss_readl(&udc->p_regs->USB_CONTROL)
2268                                 | PUE2) & ~(u32)CONNECTB;
2269
2270                         _nbu2ss_writel(&udc->p_regs->USB_CONTROL, reg_dt);
2271                 }
2272
2273         } else {
2274                 /* D+ Pulldown */
2275 /*              INFO(" --- D+ Pulldown\n"); */
2276
2277                 reg_dt = (_nbu2ss_readl(&udc->p_regs->USB_CONTROL) | CONNECTB)
2278                         & ~(u32)PUE2;
2279
2280                 _nbu2ss_writel(&udc->p_regs->USB_CONTROL, reg_dt);
2281                 udc->gadget.speed = USB_SPEED_UNKNOWN;
2282         }
2283
2284         return 0;
2285 }
2286
2287 /*-------------------------------------------------------------------------*/
2288 static void _nbu2ss_fifo_flush(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
2289 {
2290         struct fc_regs  *p = udc->p_regs;
2291
2292         if (udc->vbus_active == 0)
2293                 return;
2294
2295         if (ep->epnum == 0) {
2296                 /* EP0 */
2297                 _nbu2ss_bitset(&p->EP0_CONTROL, EP0_BCLR);
2298
2299         } else {
2300                 /* EPn */
2301                 _nbu2ss_ep_dma_abort(udc, ep);
2302                 _nbu2ss_bitset(&p->EP_REGS[ep->epnum - 1].EP_CONTROL, EPn_BCLR);
2303         }
2304 }
2305
2306 /*-------------------------------------------------------------------------*/
2307 static int _nbu2ss_enable_controller(struct nbu2ss_udc *udc)
2308 {
2309         int     waitcnt = 0;
2310
2311         if (udc->udc_enabled)
2312                 return 0;
2313
2314 #if 0
2315         emxx_open_clockgate(EMXX_CLK_USB1);
2316         /* emxx_clkctrl_off(EMXX_CLKCTRL_USB1); */
2317         /* emxx_clkctrl_on(EMXX_CLKCTRL_USB1); */
2318         emxx_unreset_device(EMXX_RST_USB1);
2319 #endif
2320         /*
2321                 Reset
2322         */
2323         _nbu2ss_bitset(&udc->p_regs->EPCTR, (DIRPD | EPC_RST));
2324         udelay(EPC_RST_DISABLE_TIME);   /* 1us wait */
2325
2326         _nbu2ss_bitclr(&udc->p_regs->EPCTR, DIRPD);
2327         mdelay(EPC_DIRPD_DISABLE_TIME); /* 1ms wait */
2328
2329         _nbu2ss_bitclr(&udc->p_regs->EPCTR, EPC_RST);
2330
2331         _nbu2ss_writel(&udc->p_regs->AHBSCTR, WAIT_MODE);
2332
2333 #if 0
2334         /* DMA Mode Setting */
2335         if ((system_rev & EMXX_REV_MASK) == EMXX_REV_ES1) {
2336                 _nbu2ss_bitset(&udc->p_regs->AHBMCTR, BURST_TYPE);
2337                 _nbu2ss_bitclr(&udc->p_regs->AHBMCTR, HTRANS_MODE);
2338         } else
2339 #endif
2340                 _nbu2ss_writel(&udc->p_regs->AHBMCTR,
2341                         HBUSREQ_MODE | HTRANS_MODE | WBURST_TYPE);
2342
2343         while (!(_nbu2ss_readl(&udc->p_regs->EPCTR) & PLL_LOCK)) {
2344                 waitcnt++;
2345                 udelay(1);      /* 1us wait */
2346                 if (waitcnt == EPC_PLL_LOCK_COUNT) {
2347                         dev_err(udc->dev, "*** Reset Cancel failed\n");
2348                         return -EINVAL;
2349                 }
2350         };
2351
2352 #if 0
2353         if ((system_rev & EMXX_REV_MASK) < EMXX_REV_ES3)
2354 #endif
2355                 _nbu2ss_bitset(&udc->p_regs->UTMI_CHARACTER_1, USB_SQUSET);
2356
2357         _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, (INT_SEL | SOF_RCV));
2358
2359         /* EP0 */
2360         _nbu2ss_ep0_enable(udc);
2361
2362         /* USB Interrupt Enable */
2363         _nbu2ss_bitset(&udc->p_regs->USB_INT_ENA, USB_INT_EN_BIT);
2364
2365         udc->udc_enabled = TRUE;
2366
2367         return 0;
2368 }
2369
2370
2371 /*-------------------------------------------------------------------------*/
2372 static void _nbu2ss_reset_controller(struct nbu2ss_udc *udc)
2373 {
2374         _nbu2ss_bitset(&udc->p_regs->EPCTR, EPC_RST);
2375         _nbu2ss_bitclr(&udc->p_regs->EPCTR, EPC_RST);
2376 }
2377
2378 /*-------------------------------------------------------------------------*/
2379 static void _nbu2ss_disable_controller(struct nbu2ss_udc *udc)
2380 {
2381         if (udc->udc_enabled) {
2382                 udc->udc_enabled = FALSE;
2383                 _nbu2ss_reset_controller(udc);
2384                 _nbu2ss_bitset(&udc->p_regs->EPCTR, (DIRPD | EPC_RST));
2385         }
2386 #if 0
2387         emxx_reset_device(EMXX_RST_USB1);
2388         /* emxx_clkctrl_on(EMXX_CLKCTRL_USB1); */
2389         emxx_close_clockgate(EMXX_CLK_USB1);
2390 #endif
2391 }
2392
2393 /*-------------------------------------------------------------------------*/
2394 static inline void _nbu2ss_check_vbus(struct nbu2ss_udc *udc)
2395 {
2396         int     nret;
2397         u32     reg_dt;
2398
2399         /* chattering */
2400         mdelay(VBUS_CHATTERING_MDELAY);         /* wait (ms) */
2401
2402         /* VBUS ON Check*/
2403         reg_dt = gpio_get_value(VBUS_VALUE);
2404         if (reg_dt == 0) {
2405
2406                 udc->linux_suspended = 0;
2407
2408                 _nbu2ss_reset_controller(udc);
2409                 dev_info(udc->dev, " ----- VBUS OFF\n");
2410
2411                 if (udc->vbus_active == 1) {
2412                         /* VBUS OFF */
2413                         udc->vbus_active = 0;
2414                         if (udc->usb_suspended) {
2415                                 udc->usb_suspended = 0;
2416                                 /* _nbu2ss_reset_controller(udc); */
2417                         }
2418                         udc->devstate = USB_STATE_NOTATTACHED;
2419
2420                         _nbu2ss_quiesce(udc);
2421                         if (udc->driver) {
2422                                 spin_unlock(&udc->lock);
2423                                 udc->driver->disconnect(&udc->gadget);
2424                                 spin_lock(&udc->lock);
2425                         }
2426
2427                         _nbu2ss_disable_controller(udc);
2428                 }
2429         } else {
2430                 mdelay(5);              /* wait (5ms) */
2431                 reg_dt = gpio_get_value(VBUS_VALUE);
2432                 if (reg_dt == 0)
2433                         return;
2434
2435                 dev_info(udc->dev, " ----- VBUS ON\n");
2436
2437                 if (udc->linux_suspended)
2438                         return;
2439
2440                 if (udc->vbus_active == 0) {
2441                         /* VBUS ON */
2442                         udc->vbus_active = 1;
2443                         udc->devstate = USB_STATE_POWERED;
2444
2445                         nret = _nbu2ss_enable_controller(udc);
2446                         if (nret < 0) {
2447                                 _nbu2ss_disable_controller(udc);
2448                                 udc->vbus_active = 0;
2449                                 return;
2450                         }
2451
2452                         _nbu2ss_pullup(udc, 1);
2453
2454 #ifdef UDC_DEBUG_DUMP
2455                         _nbu2ss_dump_register(udc);
2456 #endif /* UDC_DEBUG_DUMP */
2457
2458                 } else {
2459                         if (udc->devstate == USB_STATE_POWERED)
2460                                 _nbu2ss_pullup(udc, 1);
2461                 }
2462         }
2463 }
2464
2465 /*-------------------------------------------------------------------------*/
2466 static inline void _nbu2ss_int_bus_reset(struct nbu2ss_udc *udc)
2467 {
2468         udc->devstate           = USB_STATE_DEFAULT;
2469         udc->remote_wakeup      = 0;
2470
2471         _nbu2ss_quiesce(udc);
2472
2473         udc->ep0state = EP0_IDLE;
2474 }
2475
2476 /*-------------------------------------------------------------------------*/
2477 static inline void _nbu2ss_int_usb_resume(struct nbu2ss_udc *udc)
2478 {
2479         if (udc->usb_suspended == 1) {
2480                 udc->usb_suspended = 0;
2481                 if (udc->driver && udc->driver->resume) {
2482                         spin_unlock(&udc->lock);
2483                         udc->driver->resume(&udc->gadget);
2484                         spin_lock(&udc->lock);
2485                 }
2486         }
2487 }
2488
2489 /*-------------------------------------------------------------------------*/
2490 static inline void _nbu2ss_int_usb_suspend(struct nbu2ss_udc *udc)
2491 {
2492         u32     reg_dt;
2493
2494         if (udc->usb_suspended == 0) {
2495                 reg_dt = gpio_get_value(VBUS_VALUE);
2496
2497                 if (reg_dt == 0)
2498                         return;
2499
2500                 udc->usb_suspended = 1;
2501                 if (udc->driver && udc->driver->suspend) {
2502                         spin_unlock(&udc->lock);
2503                         udc->driver->suspend(&udc->gadget);
2504                         spin_lock(&udc->lock);
2505                 }
2506
2507                 _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, SUSPEND);
2508         }
2509 }
2510
2511 /*-------------------------------------------------------------------------*/
2512 /* VBUS (GPIO153) Interrupt */
2513 static irqreturn_t _nbu2ss_vbus_irq(int irq, void *_udc)
2514 {
2515         struct nbu2ss_udc       *udc = (struct nbu2ss_udc *)_udc;
2516
2517         spin_lock(&udc->lock);
2518         _nbu2ss_check_vbus(udc);
2519         spin_unlock(&udc->lock);
2520
2521         return IRQ_HANDLED;
2522 }
2523
2524 /*-------------------------------------------------------------------------*/
2525 /* Interrupt (udc) */
2526 static irqreturn_t _nbu2ss_udc_irq(int irq, void *_udc)
2527 {
2528         u8      suspend_flag = 0;
2529         u32     status;
2530         u32     epnum, int_bit;
2531
2532         struct nbu2ss_udc       *udc = (struct nbu2ss_udc *)_udc;
2533         struct fc_regs  *preg = udc->p_regs;
2534
2535         if (gpio_get_value(VBUS_VALUE) == 0) {
2536                 _nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW);
2537                 _nbu2ss_writel(&preg->USB_INT_ENA, 0);
2538                 return IRQ_HANDLED;
2539         }
2540
2541         spin_lock(&udc->lock);
2542
2543         for (;;) {
2544                 if (gpio_get_value(VBUS_VALUE) == 0) {
2545                         _nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW);
2546                         _nbu2ss_writel(&preg->USB_INT_ENA, 0);
2547                         status = 0;
2548                 } else
2549                         status = _nbu2ss_readl(&preg->USB_INT_STA);
2550
2551                 if (status == 0)
2552                         break;
2553
2554                 _nbu2ss_writel(&preg->USB_INT_STA, ~(status & USB_INT_STA_RW));
2555
2556                 if (status & USB_RST_INT) {
2557                         /* USB Reset */
2558                         _nbu2ss_int_bus_reset(udc);
2559                 }
2560
2561                 if (status & RSUM_INT) {
2562                         /* Resume */
2563                         _nbu2ss_int_usb_resume(udc);
2564                 }
2565
2566                 if (status & SPND_INT) {
2567                         /* Suspend */
2568                         suspend_flag = 1;
2569                 }
2570
2571                 if (status & EPn_INT) {
2572                         /* EP INT */
2573                         int_bit = status >> 8;
2574
2575                         for (epnum = 0; epnum < NUM_ENDPOINTS; epnum++) {
2576
2577                                 if (0x01 & int_bit)
2578                                         _nbu2ss_ep_int(udc, epnum);
2579
2580                                 int_bit >>= 1;
2581
2582                                 if (int_bit == 0)
2583                                         break;
2584                         }
2585                 }
2586         }
2587
2588         if (suspend_flag)
2589                 _nbu2ss_int_usb_suspend(udc);
2590
2591         spin_unlock(&udc->lock);
2592
2593         return IRQ_HANDLED;
2594 }
2595
2596 /*-------------------------------------------------------------------------*/
2597 /* usb_ep_ops */
2598 static int nbu2ss_ep_enable(
2599         struct usb_ep *_ep,
2600         const struct usb_endpoint_descriptor *desc)
2601 {
2602         u8              ep_type;
2603         unsigned long   flags;
2604
2605         struct nbu2ss_ep        *ep;
2606         struct nbu2ss_udc       *udc;
2607
2608         if ((_ep == NULL) || (desc == NULL)) {
2609                 pr_err(" *** %s, bad param\n", __func__);
2610                 return -EINVAL;
2611         }
2612
2613         ep = container_of(_ep, struct nbu2ss_ep, ep);
2614         if ((ep == NULL) || (ep->udc == NULL)) {
2615                 pr_err(" *** %s, ep == NULL !!\n", __func__);
2616                 return -EINVAL;
2617         }
2618
2619         ep_type = usb_endpoint_type(desc);
2620         if ((ep_type == USB_ENDPOINT_XFER_CONTROL)
2621                 || (ep_type == USB_ENDPOINT_XFER_ISOC)) {
2622
2623                 pr_err(" *** %s, bat bmAttributes\n", __func__);
2624                 return -EINVAL;
2625         }
2626
2627         udc = ep->udc;
2628         if (udc->vbus_active == 0)
2629                 return -ESHUTDOWN;
2630
2631         if ((udc->driver == NULL)
2632                 || (udc->gadget.speed == USB_SPEED_UNKNOWN)) {
2633
2634                 dev_err(ep->udc->dev, " *** %s, udc !!\n", __func__);
2635                 return -ESHUTDOWN;
2636         }
2637
2638         spin_lock_irqsave(&udc->lock, flags);
2639
2640         ep->desc = desc;
2641         ep->epnum = usb_endpoint_num(desc);
2642         ep->direct = desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
2643         ep->ep_type = ep_type;
2644         ep->wedged = 0;
2645         ep->halted = FALSE;
2646         ep->stalled = FALSE;
2647
2648         ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
2649
2650         /* DMA setting */
2651         _nbu2ss_ep_dma_init(udc, ep);
2652
2653         /* Endpoint setting */
2654         _nbu2ss_ep_init(udc, ep);
2655
2656         spin_unlock_irqrestore(&udc->lock, flags);
2657
2658         return 0;
2659 }
2660
2661 /*-------------------------------------------------------------------------*/
2662 static int nbu2ss_ep_disable(struct usb_ep *_ep)
2663 {
2664         struct nbu2ss_ep        *ep;
2665         struct nbu2ss_udc       *udc;
2666         unsigned long           flags;
2667
2668         if (_ep == NULL) {
2669                 pr_err(" *** %s, bad param\n", __func__);
2670                 return -EINVAL;
2671         }
2672
2673         ep = container_of(_ep, struct nbu2ss_ep, ep);
2674         if ((ep == NULL) || (ep->udc == NULL)) {
2675                 pr_err("udc: *** %s, ep == NULL !!\n", __func__);
2676                 return -EINVAL;
2677         }
2678
2679         udc = ep->udc;
2680         if (udc->vbus_active == 0)
2681                 return -ESHUTDOWN;
2682
2683         spin_lock_irqsave(&udc->lock, flags);
2684         _nbu2ss_nuke(udc, ep, -EINPROGRESS);            /* dequeue request */
2685         spin_unlock_irqrestore(&udc->lock, flags);
2686
2687         return 0;
2688 }
2689
2690 /*-------------------------------------------------------------------------*/
2691 static struct usb_request *nbu2ss_ep_alloc_request(
2692         struct usb_ep *ep,
2693         gfp_t gfp_flags)
2694 {
2695         struct nbu2ss_req *req;
2696
2697         req = kzalloc(sizeof(*req), gfp_flags);
2698         if (!req)
2699                 return 0;
2700
2701 #ifdef USE_DMA
2702         req->req.dma = DMA_ADDR_INVALID;
2703 #endif
2704         INIT_LIST_HEAD(&req->queue);
2705
2706         return &req->req;
2707 }
2708
2709 /*-------------------------------------------------------------------------*/
2710 static void nbu2ss_ep_free_request(
2711         struct usb_ep *_ep,
2712         struct usb_request *_req)
2713 {
2714         struct nbu2ss_req *req;
2715
2716         if (_req != NULL) {
2717                 req = container_of(_req, struct nbu2ss_req, req);
2718
2719                 kfree(req);
2720         }
2721 }
2722
2723 /*-------------------------------------------------------------------------*/
2724 static int nbu2ss_ep_queue(
2725         struct usb_ep *_ep,
2726         struct usb_request *_req,
2727         gfp_t gfp_flags)
2728 {
2729         struct nbu2ss_req       *req;
2730         struct nbu2ss_ep        *ep;
2731         struct nbu2ss_udc       *udc;
2732         unsigned long           flags;
2733         bool                    bflag;
2734         int                     result = -EINVAL;
2735
2736         /* catch various bogus parameters */
2737         if ((_ep == NULL) || (_req == NULL)) {
2738                 if (_ep == NULL)
2739                         pr_err("udc: %s --- _ep == NULL\n", __func__);
2740
2741                 if (_req == NULL)
2742                         pr_err("udc: %s --- _req == NULL\n", __func__);
2743
2744                 return -EINVAL;
2745         }
2746
2747         req = container_of(_req, struct nbu2ss_req, req);
2748         if (unlikely
2749             (!_req->complete || !_req->buf
2750              || !list_empty(&req->queue))) {
2751
2752                 if (!_req->complete)
2753                         pr_err("udc: %s --- !_req->complete\n", __func__);
2754
2755                 if (!_req->buf)
2756                         pr_err("udc:%s --- !_req->buf\n", __func__);
2757
2758                 if (!list_empty(&req->queue))
2759                         pr_err("%s --- !list_empty(&req->queue)\n", __func__);
2760
2761                 return -EINVAL;
2762         }
2763
2764         ep = container_of(_ep, struct nbu2ss_ep, ep);
2765         udc = ep->udc;
2766
2767 /*      INFO("=== %s(ep%d), zero=%d\n", __func__, ep->epnum, _req->zero); */
2768
2769         if (udc->vbus_active == 0) {
2770                 dev_info(udc->dev, "Can't ep_queue (VBUS OFF)\n");
2771                 return -ESHUTDOWN;
2772         }
2773
2774         if (unlikely(!udc->driver)) {
2775                 dev_err(udc->dev, "%s, bogus device state %p\n", __func__,
2776                                 udc->driver);
2777                 return -ESHUTDOWN;
2778         }
2779
2780         spin_lock_irqsave(&udc->lock, flags);
2781
2782 #ifdef USE_DMA
2783         if ((u32)req->req.buf & 0x3)
2784                 req->unaligned = TRUE;
2785         else
2786                 req->unaligned = FALSE;
2787
2788         if (req->unaligned) {
2789                 if (ep->virt_buf == NULL)
2790                         ep->virt_buf = (u8 *)dma_alloc_coherent(
2791                                 NULL, PAGE_SIZE,
2792                                 &ep->phys_buf, GFP_ATOMIC | GFP_DMA);
2793                 if (ep->epnum > 0)  {
2794                         if (ep->direct == USB_DIR_IN)
2795                                 memcpy(ep->virt_buf, req->req.buf,
2796                                         req->req.length);
2797                 }
2798         }
2799
2800         if ((ep->epnum > 0) && (ep->direct == USB_DIR_OUT) &&
2801                         (req->req.dma != 0))
2802                 _nbu2ss_dma_map_single(udc, ep, req, USB_DIR_OUT);
2803 #endif
2804
2805         _req->status = -EINPROGRESS;
2806         _req->actual = 0;
2807
2808         bflag = list_empty(&ep->queue);
2809         list_add_tail(&req->queue, &ep->queue);
2810
2811         if ((bflag != FALSE) && (ep->stalled == FALSE)) {
2812
2813                 result = _nbu2ss_start_transfer(udc, ep, req, FALSE);
2814                 if (result < 0) {
2815                         dev_err(udc->dev, " *** %s, result = %d\n", __func__,
2816                                         result);
2817                         list_del(&req->queue);
2818                 } else if ((ep->epnum > 0) && (ep->direct == USB_DIR_OUT)) {
2819 #ifdef USE_DMA
2820                         if (req->req.length < 4 &&
2821                                 req->req.length == req->req.actual)
2822 #else
2823                         if (req->req.length == req->req.actual)
2824 #endif
2825                                 _nbu2ss_ep_done(ep, req, result);
2826                 }
2827         }
2828
2829         spin_unlock_irqrestore(&udc->lock, flags);
2830
2831         return 0;
2832 }
2833
2834 /*-------------------------------------------------------------------------*/
2835 static int nbu2ss_ep_dequeue(
2836         struct usb_ep *_ep,
2837         struct usb_request *_req)
2838 {
2839         struct nbu2ss_req       *req;
2840         struct nbu2ss_ep        *ep;
2841         struct nbu2ss_udc       *udc;
2842         unsigned long flags;
2843
2844         /*INFO("=== %s()\n", __func__);*/
2845
2846         /* catch various bogus parameters */
2847         if ((_ep == NULL) || (_req == NULL)) {
2848                 /* pr_err("%s, bad param(1)\n", __func__); */
2849                 return -EINVAL;
2850         }
2851
2852         ep = container_of(_ep, struct nbu2ss_ep, ep);
2853         if (!ep) {
2854                 pr_err("%s, ep == NULL !!\n", __func__);
2855                 return -EINVAL;
2856         }
2857
2858         udc = ep->udc;
2859         if (udc == NULL)
2860                 return -EINVAL;
2861
2862         spin_lock_irqsave(&udc->lock, flags);
2863
2864         /* make sure it's actually queued on this endpoint */
2865         list_for_each_entry(req, &ep->queue, queue) {
2866                 if (&req->req == _req)
2867                         break;
2868         }
2869         if (&req->req != _req) {
2870                 spin_unlock_irqrestore(&udc->lock, flags);
2871                 pr_debug("%s no queue(EINVAL)\n", __func__);
2872                 return -EINVAL;
2873         }
2874
2875         _nbu2ss_ep_done(ep, req, -ECONNRESET);
2876
2877         spin_unlock_irqrestore(&udc->lock, flags);
2878
2879         return 0;
2880 }
2881
2882 /*-------------------------------------------------------------------------*/
2883 static int nbu2ss_ep_set_halt(struct usb_ep *_ep, int value)
2884 {
2885         u8              ep_adrs;
2886         unsigned long   flags;
2887
2888         struct nbu2ss_ep        *ep;
2889         struct nbu2ss_udc       *udc;
2890
2891 /*      INFO("=== %s()\n", __func__); */
2892
2893         if (!_ep) {
2894                 pr_err("%s, bad param\n", __func__);
2895                 return -EINVAL;
2896         }
2897
2898         ep = container_of(_ep, struct nbu2ss_ep, ep);
2899         if (!ep) {
2900                 pr_err("%s, bad ep\n", __func__);
2901                 return -EINVAL;
2902         }
2903
2904         udc = ep->udc;
2905         if (!udc) {
2906                 dev_err(ep->udc->dev, " *** %s, bad udc\n", __func__);
2907                 return -EINVAL;
2908         }
2909
2910         spin_lock_irqsave(&udc->lock, flags);
2911
2912         ep_adrs = ep->epnum | ep->direct;
2913         if (value == 0) {
2914                 _nbu2ss_set_endpoint_stall(udc, ep_adrs, value);
2915                 ep->stalled = FALSE;
2916         } else {
2917                 if (list_empty(&ep->queue))
2918                         _nbu2ss_epn_set_stall(udc, ep);
2919                 else
2920                         ep->stalled = TRUE;
2921         }
2922
2923         if (value == 0)
2924                 ep->wedged = 0;
2925
2926         spin_unlock_irqrestore(&udc->lock, flags);
2927
2928         return 0;
2929 }
2930
2931 static int nbu2ss_ep_set_wedge(struct usb_ep *_ep)
2932 {
2933         return nbu2ss_ep_set_halt(_ep, 1);
2934 }
2935
2936 /*-------------------------------------------------------------------------*/
2937 static int nbu2ss_ep_fifo_status(struct usb_ep *_ep)
2938 {
2939         u32             data;
2940         struct nbu2ss_ep        *ep;
2941         struct nbu2ss_udc       *udc;
2942         unsigned long           flags;
2943         struct fc_regs          *preg;
2944
2945 /*      INFO("=== %s()\n", __func__); */
2946
2947         if (!_ep) {
2948                 pr_err("%s, bad param\n", __func__);
2949                 return -EINVAL;
2950         }
2951
2952         ep = container_of(_ep, struct nbu2ss_ep, ep);
2953         if (!ep) {
2954                 pr_err("%s, bad ep\n", __func__);
2955                 return -EINVAL;
2956         }
2957
2958         udc = ep->udc;
2959         if (!udc) {
2960                 dev_err(ep->udc->dev, "%s, bad udc\n", __func__);
2961                 return -EINVAL;
2962         }
2963
2964         preg = udc->p_regs;
2965
2966         data = gpio_get_value(VBUS_VALUE);
2967         if (data == 0)
2968                 return -EINVAL;
2969
2970         spin_lock_irqsave(&udc->lock, flags);
2971
2972         if (ep->epnum == 0) {
2973                 data = _nbu2ss_readl(&preg->EP0_LENGTH) & EP0_LDATA;
2974
2975         } else {
2976                 data = _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_LEN_DCNT)
2977                         & EPn_LDATA;
2978         }
2979
2980         spin_unlock_irqrestore(&udc->lock, flags);
2981
2982         return 0;
2983 }
2984
2985 /*-------------------------------------------------------------------------*/
2986 static void  nbu2ss_ep_fifo_flush(struct usb_ep *_ep)
2987 {
2988         u32                     data;
2989         struct nbu2ss_ep        *ep;
2990         struct nbu2ss_udc       *udc;
2991         unsigned long           flags;
2992
2993 /*      INFO("=== %s()\n", __func__); */
2994
2995         if (!_ep) {
2996                 pr_err("udc: %s, bad param\n", __func__);
2997                 return;
2998         }
2999
3000         ep = container_of(_ep, struct nbu2ss_ep, ep);
3001         if (!_ep) {
3002                 pr_err("udc: %s, bad ep\n", __func__);
3003                 return;
3004         }
3005
3006         udc = ep->udc;
3007         if (!udc) {
3008                 dev_err(ep->udc->dev, "%s, bad udc\n", __func__);
3009                 return;
3010         }
3011
3012         data = gpio_get_value(VBUS_VALUE);
3013         if (data == 0)
3014                 return;
3015
3016         spin_lock_irqsave(&udc->lock, flags);
3017         _nbu2ss_fifo_flush(udc, ep);
3018         spin_unlock_irqrestore(&udc->lock, flags);
3019 }
3020
3021 /*-------------------------------------------------------------------------*/
3022 static struct usb_ep_ops nbu2ss_ep_ops = {
3023         .enable         = nbu2ss_ep_enable,
3024         .disable        = nbu2ss_ep_disable,
3025
3026         .alloc_request  = nbu2ss_ep_alloc_request,
3027         .free_request   = nbu2ss_ep_free_request,
3028
3029         .queue          = nbu2ss_ep_queue,
3030         .dequeue        = nbu2ss_ep_dequeue,
3031
3032         .set_halt       = nbu2ss_ep_set_halt,
3033         .set_wedge      = nbu2ss_ep_set_wedge,
3034
3035         .fifo_status    = nbu2ss_ep_fifo_status,
3036         .fifo_flush     = nbu2ss_ep_fifo_flush,
3037 };
3038
3039
3040 /*-------------------------------------------------------------------------*/
3041 /* usb_gadget_ops */
3042
3043 /*-------------------------------------------------------------------------*/
3044 static int nbu2ss_gad_get_frame(struct usb_gadget *pgadget)
3045 {
3046         u32                     data;
3047         struct nbu2ss_udc       *udc;
3048
3049 /*      INFO("=== %s()\n", __func__); */
3050
3051         if (pgadget == NULL) {
3052                 pr_err("udc: %s, bad param\n", __func__);
3053                 return -EINVAL;
3054         }
3055
3056         udc = container_of(pgadget, struct nbu2ss_udc, gadget);
3057         if (udc == NULL) {
3058                 dev_err(&pgadget->dev, "%s, udc == NULL\n", __func__);
3059                 return -EINVAL;
3060         }
3061
3062         data = gpio_get_value(VBUS_VALUE);
3063         if (data == 0)
3064                 return -EINVAL;
3065
3066         data = _nbu2ss_readl(&udc->p_regs->USB_ADDRESS) & FRAME;
3067
3068         return data;
3069 }
3070
3071 /*-------------------------------------------------------------------------*/
3072 static int nbu2ss_gad_wakeup(struct usb_gadget *pgadget)
3073 {
3074         int     i;
3075         u32     data;
3076
3077         struct nbu2ss_udc       *udc;
3078
3079 /*      INFO("=== %s()\n", __func__); */
3080
3081         if (pgadget == NULL) {
3082                 pr_err("%s, bad param\n", __func__);
3083                 return -EINVAL;
3084         }
3085
3086         udc = container_of(pgadget, struct nbu2ss_udc, gadget);
3087         if (udc == NULL) {
3088                 dev_err(&pgadget->dev, "%s, udc == NULL\n", __func__);
3089                 return -EINVAL;
3090         }
3091
3092         data = gpio_get_value(VBUS_VALUE);
3093         if (data == 0) {
3094                 dev_warn(&pgadget->dev, "VBUS LEVEL = %d\n", data);
3095                 return -EINVAL;
3096         }
3097
3098         _nbu2ss_bitset(&udc->p_regs->EPCTR, PLL_RESUME);
3099
3100         for (i = 0; i < EPC_PLL_LOCK_COUNT; i++) {
3101                 data = _nbu2ss_readl(&udc->p_regs->EPCTR);
3102
3103                 if (data & PLL_LOCK)
3104                         break;
3105         }
3106
3107         _nbu2ss_bitclr(&udc->p_regs->EPCTR, PLL_RESUME);
3108
3109         return 0;
3110 }
3111
3112 /*-------------------------------------------------------------------------*/
3113 static int nbu2ss_gad_set_selfpowered(struct usb_gadget *pgadget,
3114                                         int is_selfpowered)
3115 {
3116         struct nbu2ss_udc       *udc;
3117         unsigned long           flags;
3118
3119 /*      INFO("=== %s()\n", __func__); */
3120
3121         if (pgadget == NULL) {
3122                 pr_err("%s, bad param\n", __func__);
3123                 return -EINVAL;
3124         }
3125
3126         udc = container_of(pgadget, struct nbu2ss_udc, gadget);
3127
3128         spin_lock_irqsave(&udc->lock, flags);
3129         pgadget->is_selfpowered = (is_selfpowered != 0);
3130         spin_unlock_irqrestore(&udc->lock, flags);
3131
3132         return 0;
3133 }
3134
3135 /*-------------------------------------------------------------------------*/
3136 static int nbu2ss_gad_vbus_session(struct usb_gadget *pgadget, int is_active)
3137 {
3138 /*      INFO("=== %s()\n", __func__); */
3139         return 0;
3140 }
3141
3142 /*-------------------------------------------------------------------------*/
3143 static int nbu2ss_gad_vbus_draw(struct usb_gadget *pgadget, unsigned mA)
3144 {
3145         struct nbu2ss_udc       *udc;
3146         unsigned long           flags;
3147
3148 /*      INFO("=== %s()\n", __func__); */
3149
3150         if (pgadget == NULL) {
3151                 pr_err("%s, bad param\n", __func__);
3152                 return -EINVAL;
3153         }
3154
3155         udc = container_of(pgadget, struct nbu2ss_udc, gadget);
3156
3157         spin_lock_irqsave(&udc->lock, flags);
3158         udc->mA = mA;
3159         spin_unlock_irqrestore(&udc->lock, flags);
3160
3161         return 0;
3162 }
3163
3164 /*-------------------------------------------------------------------------*/
3165 static int nbu2ss_gad_pullup(struct usb_gadget *pgadget, int is_on)
3166 {
3167         struct nbu2ss_udc       *udc;
3168         unsigned long           flags;
3169
3170 /*      INFO("=== %s()\n", __func__); */
3171
3172         if (pgadget == NULL) {
3173                 pr_err("%s, bad param\n", __func__);
3174                 return -EINVAL;
3175         }
3176
3177         udc = container_of(pgadget, struct nbu2ss_udc, gadget);
3178
3179         if (udc->driver == NULL) {
3180                 pr_warn("%s, Not Regist Driver\n", __func__);
3181                 return -EINVAL;
3182         }
3183
3184         if (udc->vbus_active == 0)
3185                 return -ESHUTDOWN;
3186
3187         spin_lock_irqsave(&udc->lock, flags);
3188         _nbu2ss_pullup(udc, is_on);
3189         spin_unlock_irqrestore(&udc->lock, flags);
3190
3191         return 0;
3192 }
3193
3194 /*-------------------------------------------------------------------------*/
3195 static int nbu2ss_gad_ioctl(
3196         struct usb_gadget *pgadget,
3197         unsigned code,
3198         unsigned long param)
3199 {
3200 /*      INFO("=== %s()\n", __func__); */
3201         return 0;
3202 }
3203
3204
3205 static const struct usb_gadget_ops nbu2ss_gadget_ops = {
3206         .get_frame              = nbu2ss_gad_get_frame,
3207         .wakeup                 = nbu2ss_gad_wakeup,
3208         .set_selfpowered        = nbu2ss_gad_set_selfpowered,
3209         .vbus_session           = nbu2ss_gad_vbus_session,
3210         .vbus_draw              = nbu2ss_gad_vbus_draw,
3211         .pullup                 = nbu2ss_gad_pullup,
3212         .ioctl                  = nbu2ss_gad_ioctl,
3213 };
3214
3215 static const char g_ep0_name[] = "ep0";
3216 static const char g_ep1_name[] = "ep1-bulk";
3217 static const char g_ep2_name[] = "ep2-bulk";
3218 static const char g_ep3_name[] = "ep3in-int";
3219 static const char g_ep4_name[] = "ep4-iso";
3220 static const char g_ep5_name[] = "ep5-iso";
3221 static const char g_ep6_name[] = "ep6-bulk";
3222 static const char g_ep7_name[] = "ep7-bulk";
3223 static const char g_ep8_name[] = "ep8in-int";
3224 static const char g_ep9_name[] = "ep9-iso";
3225 static const char g_epa_name[] = "epa-iso";
3226 static const char g_epb_name[] = "epb-bulk";
3227 static const char g_epc_name[] = "epc-nulk";
3228 static const char g_epd_name[] = "epdin-int";
3229
3230 static const char *gp_ep_name[NUM_ENDPOINTS] = {
3231         g_ep0_name,
3232         g_ep1_name,
3233         g_ep2_name,
3234         g_ep3_name,
3235         g_ep4_name,
3236         g_ep5_name,
3237         g_ep6_name,
3238         g_ep7_name,
3239         g_ep8_name,
3240         g_ep9_name,
3241         g_epa_name,
3242         g_epb_name,
3243         g_epc_name,
3244         g_epd_name,
3245 };
3246
3247 /*-------------------------------------------------------------------------*/
3248 static void __init nbu2ss_drv_ep_init(struct nbu2ss_udc *udc)
3249 {
3250         int     i;
3251
3252         INIT_LIST_HEAD(&udc->gadget.ep_list);
3253         udc->gadget.ep0 = &udc->ep[0].ep;
3254
3255         for (i = 0; i < NUM_ENDPOINTS; i++) {
3256                 struct nbu2ss_ep *ep = &udc->ep[i];
3257
3258                 ep->udc = udc;
3259                 ep->desc = NULL;
3260
3261                 ep->ep.driver_data = NULL;
3262                 ep->ep.name = gp_ep_name[i];
3263                 ep->ep.ops = &nbu2ss_ep_ops;
3264
3265                 ep->ep.maxpacket = (i == 0 ? EP0_PACKETSIZE : EP_PACKETSIZE);
3266
3267                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
3268                 INIT_LIST_HEAD(&ep->queue);
3269         }
3270
3271         list_del_init(&udc->ep[0].ep.ep_list);
3272 }
3273
3274 /*-------------------------------------------------------------------------*/
3275 /* platform_driver */
3276 static int __init nbu2ss_drv_contest_init(
3277         struct platform_device *pdev,
3278         struct nbu2ss_udc *udc)
3279 {
3280         spin_lock_init(&udc->lock);
3281         udc->dev = &pdev->dev;
3282
3283         udc->gadget.is_selfpowered = 1;
3284         udc->devstate = USB_STATE_NOTATTACHED;
3285         udc->pdev = pdev;
3286         udc->mA = 0;
3287
3288         udc->pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
3289
3290         /* init Endpoint */
3291         nbu2ss_drv_ep_init(udc);
3292
3293         /* init Gadget */
3294         udc->gadget.ops = &nbu2ss_gadget_ops;
3295         udc->gadget.ep0 = &udc->ep[0].ep;
3296         udc->gadget.speed = USB_SPEED_UNKNOWN;
3297         udc->gadget.name = driver_name;
3298         /* udc->gadget.is_dualspeed = 1; */
3299
3300         device_initialize(&udc->gadget.dev);
3301
3302         dev_set_name(&udc->gadget.dev, "gadget");
3303         udc->gadget.dev.parent = &pdev->dev;
3304         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
3305
3306         return 0;
3307 }
3308
3309 /*
3310  *      probe - binds to the platform device
3311  */
3312 static int nbu2ss_drv_probe(struct platform_device *pdev)
3313 {
3314         int     status = -ENODEV;
3315         struct nbu2ss_udc       *udc;
3316         struct resource *r;
3317         int irq;
3318         void __iomem *mmio_base;
3319
3320         udc = &udc_controller;
3321         memset(udc, 0, sizeof(struct nbu2ss_udc));
3322
3323         platform_set_drvdata(pdev, udc);
3324
3325         /* require I/O memory and IRQ to be provided as resources */
3326         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
3327         mmio_base = devm_ioremap_resource(&pdev->dev, r);
3328         if (IS_ERR(mmio_base))
3329                 return PTR_ERR(mmio_base);
3330
3331         irq = platform_get_irq(pdev, 0);
3332         if (irq < 0) {
3333                 dev_err(&pdev->dev, "failed to get IRQ\n");
3334                 return irq;
3335         }
3336         status = devm_request_irq(&pdev->dev, irq, _nbu2ss_udc_irq,
3337                                   0, driver_name, udc);
3338
3339         /* IO Memory */
3340         udc->p_regs = (struct fc_regs *)mmio_base;
3341
3342         /* USB Function Controller Interrupt */
3343         if (status != 0) {
3344                 dev_err(udc->dev, "request_irq(USB_UDC_IRQ_1) failed\n");
3345                 goto cleanup1;
3346         }
3347
3348         /* Driver Initialization */
3349         status = nbu2ss_drv_contest_init(pdev, udc);
3350         if (status < 0) {
3351                 /* Error */
3352                 goto cleanup1;
3353         }
3354
3355         /* VBUS Interrupt */
3356         irq_set_irq_type(INT_VBUS, IRQ_TYPE_EDGE_BOTH);
3357         status = request_irq(INT_VBUS,
3358                                 _nbu2ss_vbus_irq,
3359                                 IRQF_SHARED,
3360                                 driver_name,
3361                                 udc);
3362
3363         if (status != 0) {
3364                 dev_err(udc->dev, "request_irq(INT_VBUS) failed\n");
3365                 goto cleanup1;
3366         }
3367
3368         return status;
3369
3370 cleanup1:
3371         return status;
3372 }
3373
3374 /*-------------------------------------------------------------------------*/
3375 static void nbu2ss_drv_shutdown(struct platform_device *pdev)
3376 {
3377         struct nbu2ss_udc       *udc;
3378
3379         udc = platform_get_drvdata(pdev);
3380         if (udc == NULL)
3381                 return;
3382
3383         _nbu2ss_disable_controller(udc);
3384 }
3385
3386 /*-------------------------------------------------------------------------*/
3387 static int __exit nbu2ss_drv_remove(struct platform_device *pdev)
3388 {
3389         struct nbu2ss_udc       *udc;
3390         struct nbu2ss_ep        *ep;
3391         int     i;
3392
3393         udc = &udc_controller;
3394
3395         for (i = 0; i < NUM_ENDPOINTS; i++) {
3396                 ep = &udc->ep[i];
3397                 if (ep->virt_buf)
3398                         dma_free_coherent(NULL, PAGE_SIZE,
3399                                 (void *)ep->virt_buf, ep->phys_buf);
3400         }
3401
3402         /* Interrupt Handler - Release */
3403         free_irq(INT_VBUS, udc);
3404
3405         return 0;
3406 }
3407
3408 /*-------------------------------------------------------------------------*/
3409 static int nbu2ss_drv_suspend(struct platform_device *pdev, pm_message_t state)
3410 {
3411         struct nbu2ss_udc       *udc;
3412
3413         udc = platform_get_drvdata(pdev);
3414         if (udc == NULL)
3415                 return 0;
3416
3417         if (udc->vbus_active) {
3418                 udc->vbus_active = 0;
3419                 udc->devstate = USB_STATE_NOTATTACHED;
3420                 udc->linux_suspended = 1;
3421
3422                 if (udc->usb_suspended) {
3423                         udc->usb_suspended = 0;
3424                         _nbu2ss_reset_controller(udc);
3425                 }
3426
3427                 _nbu2ss_quiesce(udc);
3428         }
3429         _nbu2ss_disable_controller(udc);
3430
3431         return 0;
3432 }
3433
3434 /*-------------------------------------------------------------------------*/
3435 static int nbu2ss_drv_resume(struct platform_device *pdev)
3436 {
3437         u32     data;
3438         struct nbu2ss_udc       *udc;
3439
3440         udc = platform_get_drvdata(pdev);
3441         if (udc == NULL)
3442                 return 0;
3443
3444         data = gpio_get_value(VBUS_VALUE);
3445         if (data) {
3446                 udc->vbus_active = 1;
3447                 udc->devstate = USB_STATE_POWERED;
3448                 _nbu2ss_enable_controller(udc);
3449                 _nbu2ss_pullup(udc, 1);
3450         }
3451
3452         udc->linux_suspended = 0;
3453
3454         return 0;
3455 }
3456
3457
3458 static struct platform_driver udc_driver = {
3459         .probe          = nbu2ss_drv_probe,
3460         .shutdown       = nbu2ss_drv_shutdown,
3461         .remove         = __exit_p(nbu2ss_drv_remove),
3462         .suspend        = nbu2ss_drv_suspend,
3463         .resume         = nbu2ss_drv_resume,
3464         .driver         = {
3465                 .name   = driver_name,
3466         },
3467 };
3468
3469 module_platform_driver(udc_driver);
3470
3471 MODULE_DESCRIPTION(DRIVER_DESC);
3472 MODULE_AUTHOR("Renesas Electronics Corporation");
3473 MODULE_LICENSE("GPL");
3474
3475