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