drivers/usb/gadget/fusb300_udc.c

   1 /*
   2  * Fusb300 UDC (USB gadget)
   3  *
   4  * Copyright (C) 2010 Faraday Technology Corp.
   5  *
   6  * Author : Yuan-hsin Chen <yhchen@faraday-tech.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  *
  21  */
  22 #include <linux/dma-mapping.h>
  23 #include <linux/err.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/io.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/usb/ch9.h>
  28 #include <linux/usb/gadget.h>
  29
  30 #include "fusb300_udc.h"
  31
  32 MODULE_DESCRIPTION("FUSB300  USB gadget driver");
  33 MODULE_LICENSE("GPL");
  34 MODULE_AUTHOR("Yuan Hsin Chen <yhchen@faraday-tech.com>");
  35 MODULE_ALIAS("platform:fusb300_udc");
  36
  37 #define DRIVER_VERSION  "20 October 2010"
  38
  39 static const char udc_name[] = "fusb300_udc";
  40 static const char * const fusb300_ep_name[] = {
  41         "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7", "ep8", "ep9",
  42         "ep10", "ep11", "ep12", "ep13", "ep14", "ep15"
  43 };
  44
  45 static void done(struct fusb300_ep *ep, struct fusb300_request *req,
  46                  int status);
  47
  48 static void fusb300_enable_bit(struct fusb300 *fusb300, u32 offset,
  49                                u32 value)
  50 {
  51         u32 reg = ioread32(fusb300->reg + offset);
  52
  53         reg |= value;
  54         iowrite32(reg, fusb300->reg + offset);
  55 }
  56
  57 static void fusb300_disable_bit(struct fusb300 *fusb300, u32 offset,
  58                                 u32 value)
  59 {
  60         u32 reg = ioread32(fusb300->reg + offset);
  61
  62         reg &= ~value;
  63         iowrite32(reg, fusb300->reg + offset);
  64 }
  65
  66
  67 static void fusb300_ep_setting(struct fusb300_ep *ep,
  68                                struct fusb300_ep_info info)
  69 {
  70         ep->epnum = info.epnum;
  71         ep->type = info.type;
  72 }
  73
  74 static int fusb300_ep_release(struct fusb300_ep *ep)
  75 {
  76         if (!ep->epnum)
  77                 return 0;
  78         ep->epnum = 0;
  79         ep->stall = 0;
  80         ep->wedged = 0;
  81         return 0;
  82 }
  83
  84 static void fusb300_set_fifo_entry(struct fusb300 *fusb300,
  85                                    u32 ep)
  86 {
  87         u32 val = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  88
  89         val &= ~FUSB300_EPSET1_FIFOENTRY_MSK;
  90         val |= FUSB300_EPSET1_FIFOENTRY(FUSB300_FIFO_ENTRY_NUM);
  91         iowrite32(val, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  92 }
  93
  94 static void fusb300_set_start_entry(struct fusb300 *fusb300,
  95                                     u8 ep)
  96 {
  97         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  98         u32 start_entry = fusb300->fifo_entry_num * FUSB300_FIFO_ENTRY_NUM;
  99
 100         reg &= ~FUSB300_EPSET1_START_ENTRY_MSK  ;
 101         reg |= FUSB300_EPSET1_START_ENTRY(start_entry);
 102         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
 103         if (fusb300->fifo_entry_num == FUSB300_MAX_FIFO_ENTRY) {
 104                 fusb300->fifo_entry_num = 0;
 105                 fusb300->addrofs = 0;
 106                 pr_err("fifo entry is over the maximum number!\n");
 107         } else
 108                 fusb300->fifo_entry_num++;
 109 }
 110
 111 /* set fusb300_set_start_entry first before fusb300_set_epaddrofs */
 112 static void fusb300_set_epaddrofs(struct fusb300 *fusb300,
 113                                   struct fusb300_ep_info info)
 114 {
 115         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
 116
 117         reg &= ~FUSB300_EPSET2_ADDROFS_MSK;
 118         reg |= FUSB300_EPSET2_ADDROFS(fusb300->addrofs);
 119         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
 120         fusb300->addrofs += (info.maxpacket + 7) / 8 * FUSB300_FIFO_ENTRY_NUM;
 121 }
 122
 123 static void ep_fifo_setting(struct fusb300 *fusb300,
 124                             struct fusb300_ep_info info)
 125 {
 126         fusb300_set_fifo_entry(fusb300, info.epnum);
 127         fusb300_set_start_entry(fusb300, info.epnum);
 128         fusb300_set_epaddrofs(fusb300, info);
 129 }
 130
 131 static void fusb300_set_eptype(struct fusb300 *fusb300,
 132                                struct fusb300_ep_info info)
 133 {
 134         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 135
 136         reg &= ~FUSB300_EPSET1_TYPE_MSK;
 137         reg |= FUSB300_EPSET1_TYPE(info.type);
 138         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 139 }
 140
 141 static void fusb300_set_epdir(struct fusb300 *fusb300,
 142                               struct fusb300_ep_info info)
 143 {
 144         u32 reg;
 145
 146         if (!info.dir_in)
 147                 return;
 148         reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 149         reg &= ~FUSB300_EPSET1_DIR_MSK;
 150         reg |= FUSB300_EPSET1_DIRIN;
 151         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 152 }
 153
 154 static void fusb300_set_ep_active(struct fusb300 *fusb300,
 155                           u8 ep)
 156 {
 157         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
 158
 159         reg |= FUSB300_EPSET1_ACTEN;
 160         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
 161 }
 162
 163 static void fusb300_set_epmps(struct fusb300 *fusb300,
 164                               struct fusb300_ep_info info)
 165 {
 166         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
 167
 168         reg &= ~FUSB300_EPSET2_MPS_MSK;
 169         reg |= FUSB300_EPSET2_MPS(info.maxpacket);
 170         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
 171 }
 172
 173 static void fusb300_set_interval(struct fusb300 *fusb300,
 174                                  struct fusb300_ep_info info)
 175 {
 176         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 177
 178         reg &= ~FUSB300_EPSET1_INTERVAL(0x7);
 179         reg |= FUSB300_EPSET1_INTERVAL(info.interval);
 180         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 181 }
 182
 183 static void fusb300_set_bwnum(struct fusb300 *fusb300,
 184                               struct fusb300_ep_info info)
 185 {
 186         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 187
 188         reg &= ~FUSB300_EPSET1_BWNUM(0x3);
 189         reg |= FUSB300_EPSET1_BWNUM(info.bw_num);
 190         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
 191 }
 192
 193 static void set_ep_reg(struct fusb300 *fusb300,
 194                       struct fusb300_ep_info info)
 195 {
 196         fusb300_set_eptype(fusb300, info);
 197         fusb300_set_epdir(fusb300, info);
 198         fusb300_set_epmps(fusb300, info);
 199
 200         if (info.interval)
 201                 fusb300_set_interval(fusb300, info);
 202
 203         if (info.bw_num)
 204                 fusb300_set_bwnum(fusb300, info);
 205
 206         fusb300_set_ep_active(fusb300, info.epnum);
 207 }
 208
 209 static int config_ep(struct fusb300_ep *ep,
 210                      const struct usb_endpoint_descriptor *desc)
 211 {
 212         struct fusb300 *fusb300 = ep->fusb300;
 213         struct fusb300_ep_info info;
 214
 215         ep->desc = desc;
 216
 217         info.interval = 0;
 218         info.addrofs = 0;
 219         info.bw_num = 0;
 220
 221         info.type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
 222         info.dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
 223         info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
 224         info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 225
 226         if ((info.type == USB_ENDPOINT_XFER_INT) ||
 227            (info.type == USB_ENDPOINT_XFER_ISOC)) {
 228                 info.interval = desc->bInterval;
 229                 if (info.type == USB_ENDPOINT_XFER_ISOC)
 230                         info.bw_num = ((desc->wMaxPacketSize & 0x1800) >> 11);
 231         }
 232
 233         ep_fifo_setting(fusb300, info);
 234
 235         set_ep_reg(fusb300, info);
 236
 237         fusb300_ep_setting(ep, info);
 238
 239         fusb300->ep[info.epnum] = ep;
 240
 241         return 0;
 242 }
 243
 244 static int fusb300_enable(struct usb_ep *_ep,
 245                           const struct usb_endpoint_descriptor *desc)
 246 {
 247         struct fusb300_ep *ep;
 248
 249         ep = container_of(_ep, struct fusb300_ep, ep);
 250
 251         if (ep->fusb300->reenum) {
 252                 ep->fusb300->fifo_entry_num = 0;
 253                 ep->fusb300->addrofs = 0;
 254                 ep->fusb300->reenum = 0;
 255         }
 256
 257         return config_ep(ep, desc);
 258 }
 259
 260 static int fusb300_disable(struct usb_ep *_ep)
 261 {
 262         struct fusb300_ep *ep;
 263         struct fusb300_request *req;
 264         unsigned long flags;
 265
 266         ep = container_of(_ep, struct fusb300_ep, ep);
 267
 268         BUG_ON(!ep);
 269
 270         while (!list_empty(&ep->queue)) {
 271                 req = list_entry(ep->queue.next, struct fusb300_request, queue);
 272                 spin_lock_irqsave(&ep->fusb300->lock, flags);
 273                 done(ep, req, -ECONNRESET);
 274                 spin_unlock_irqrestore(&ep->fusb300->lock, flags);
 275         }
 276
 277         return fusb300_ep_release(ep);
 278 }
 279
 280 static struct usb_request *fusb300_alloc_request(struct usb_ep *_ep,
 281                                                 gfp_t gfp_flags)
 282 {
 283         struct fusb300_request *req;
 284
 285         req = kzalloc(sizeof(struct fusb300_request), gfp_flags);
 286         if (!req)
 287                 return NULL;
 288         INIT_LIST_HEAD(&req->queue);
 289
 290         return &req->req;
 291 }
 292
 293 static void fusb300_free_request(struct usb_ep *_ep, struct usb_request *_req)
 294 {
 295         struct fusb300_request *req;
 296
 297         req = container_of(_req, struct fusb300_request, req);
 298         kfree(req);
 299 }
 300
 301 static int enable_fifo_int(struct fusb300_ep *ep)
 302 {
 303         struct fusb300 *fusb300 = ep->fusb300;
 304
 305         if (ep->epnum) {
 306                 fusb300_enable_bit(fusb300, FUSB300_OFFSET_IGER0,
 307                         FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
 308         } else {
 309                 pr_err("can't enable_fifo_int ep0\n");
 310                 return -EINVAL;
 311         }
 312
 313         return 0;
 314 }
 315
 316 static int disable_fifo_int(struct fusb300_ep *ep)
 317 {
 318         struct fusb300 *fusb300 = ep->fusb300;
 319
 320         if (ep->epnum) {
 321                 fusb300_disable_bit(fusb300, FUSB300_OFFSET_IGER0,
 322                         FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
 323         } else {
 324                 pr_err("can't disable_fifo_int ep0\n");
 325                 return -EINVAL;
 326         }
 327
 328         return 0;
 329 }
 330
 331 static void fusb300_set_cxlen(struct fusb300 *fusb300, u32 length)
 332 {
 333         u32 reg;
 334
 335         reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
 336         reg &= ~FUSB300_CSR_LEN_MSK;
 337         reg |= FUSB300_CSR_LEN(length);
 338         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_CSR);
 339 }
 340
 341 /* write data to cx fifo */
 342 static void fusb300_wrcxf(struct fusb300_ep *ep,
 343                    struct fusb300_request *req)
 344 {
 345         int i = 0;
 346         u8 *tmp;
 347         u32 data;
 348         struct fusb300 *fusb300 = ep->fusb300;
 349         u32 length = req->req.length - req->req.actual;
 350
 351         tmp = req->req.buf + req->req.actual;
 352
 353         if (length > SS_CTL_MAX_PACKET_SIZE) {
 354                 fusb300_set_cxlen(fusb300, SS_CTL_MAX_PACKET_SIZE);
 355                 for (i = (SS_CTL_MAX_PACKET_SIZE >> 2); i > 0; i--) {
 356                         data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
 357                                 *(tmp + 3) << 24;
 358                         iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
 359                         tmp += 4;
 360                 }
 361                 req->req.actual += SS_CTL_MAX_PACKET_SIZE;
 362         } else { /* length is less than max packet size */
 363                 fusb300_set_cxlen(fusb300, length);
 364                 for (i = length >> 2; i > 0; i--) {
 365                         data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
 366                                 *(tmp + 3) << 24;
 367                         printk(KERN_DEBUG "    0x%x\n", data);
 368                         iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
 369                         tmp = tmp + 4;
 370                 }
 371                 switch (length % 4) {
 372                 case 1:
 373                         data = *tmp;
 374                         printk(KERN_DEBUG "    0x%x\n", data);
 375                         iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
 376                         break;
 377                 case 2:
 378                         data = *tmp | *(tmp + 1) << 8;
 379                         printk(KERN_DEBUG "    0x%x\n", data);
 380                         iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
 381                         break;
 382                 case 3:
 383                         data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16;
 384                         printk(KERN_DEBUG "    0x%x\n", data);
 385                         iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
 386                         break;
 387                 default:
 388                         break;
 389                 }
 390                 req->req.actual += length;
 391         }
 392 }
 393
 394 static void fusb300_set_epnstall(struct fusb300 *fusb300, u8 ep)
 395 {
 396         fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
 397                 FUSB300_EPSET0_STL);
 398 }
 399
 400 static void fusb300_clear_epnstall(struct fusb300 *fusb300, u8 ep)
 401 {
 402         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
 403
 404         if (reg & FUSB300_EPSET0_STL) {
 405                 printk(KERN_DEBUG "EP%d stall... Clear!!\n", ep);
 406                 reg &= ~FUSB300_EPSET0_STL;
 407                 iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
 408         }
 409 }
 410
 411 static void ep0_queue(struct fusb300_ep *ep, struct fusb300_request *req)
 412 {
 413         if (ep->fusb300->ep0_dir) { /* if IN */
 414                 if (req->req.length) {
 415                         fusb300_wrcxf(ep, req);
 416                 } else
 417                         printk(KERN_DEBUG "%s : req->req.length = 0x%x\n",
 418                                 __func__, req->req.length);
 419                 if ((req->req.length == req->req.actual) ||
 420                     (req->req.actual < ep->ep.maxpacket))
 421                         done(ep, req, 0);
 422         } else { /* OUT */
 423                 if (!req->req.length)
 424                         done(ep, req, 0);
 425                 else
 426                         fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER1,
 427                                 FUSB300_IGER1_CX_OUT_INT);
 428         }
 429 }
 430
 431 static int fusb300_queue(struct usb_ep *_ep, struct usb_request *_req,
 432                          gfp_t gfp_flags)
 433 {
 434         struct fusb300_ep *ep;
 435         struct fusb300_request *req;
 436         unsigned long flags;
 437         int request  = 0;
 438
 439         ep = container_of(_ep, struct fusb300_ep, ep);
 440         req = container_of(_req, struct fusb300_request, req);
 441
 442         if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
 443                 return -ESHUTDOWN;
 444
 445         spin_lock_irqsave(&ep->fusb300->lock, flags);
 446
 447         if (list_empty(&ep->queue))
 448                 request = 1;
 449
 450         list_add_tail(&req->queue, &ep->queue);
 451
 452         req->req.actual = 0;
 453         req->req.status = -EINPROGRESS;
 454
 455         if (ep->desc == NULL) /* ep0 */
 456                 ep0_queue(ep, req);
 457         else if (request && !ep->stall)
 458                 enable_fifo_int(ep);
 459
 460         spin_unlock_irqrestore(&ep->fusb300->lock, flags);
 461
 462         return 0;
 463 }
 464
 465 static int fusb300_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 466 {
 467         struct fusb300_ep *ep;
 468         struct fusb300_request *req;
 469         unsigned long flags;
 470
 471         ep = container_of(_ep, struct fusb300_ep, ep);
 472         req = container_of(_req, struct fusb300_request, req);
 473
 474         spin_lock_irqsave(&ep->fusb300->lock, flags);
 475         if (!list_empty(&ep->queue))
 476                 done(ep, req, -ECONNRESET);
 477         spin_unlock_irqrestore(&ep->fusb300->lock, flags);
 478
 479         return 0;
 480 }
 481
 482 static int fusb300_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
 483 {
 484         struct fusb300_ep *ep;
 485         struct fusb300 *fusb300;
 486         unsigned long flags;
 487         int ret = 0;
 488
 489         ep = container_of(_ep, struct fusb300_ep, ep);
 490
 491         fusb300 = ep->fusb300;
 492
 493         spin_lock_irqsave(&ep->fusb300->lock, flags);
 494
 495         if (!list_empty(&ep->queue)) {
 496                 ret = -EAGAIN;
 497                 goto out;
 498         }
 499
 500         if (value) {
 501                 fusb300_set_epnstall(fusb300, ep->epnum);
 502                 ep->stall = 1;
 503                 if (wedge)
 504                         ep->wedged = 1;
 505         } else {
 506                 fusb300_clear_epnstall(fusb300, ep->epnum);
 507                 ep->stall = 0;
 508                 ep->wedged = 0;
 509         }
 510
 511 out:
 512         spin_unlock_irqrestore(&ep->fusb300->lock, flags);
 513         return ret;
 514 }
 515
 516 static int fusb300_set_halt(struct usb_ep *_ep, int value)
 517 {
 518         return fusb300_set_halt_and_wedge(_ep, value, 0);
 519 }
 520
 521 static int fusb300_set_wedge(struct usb_ep *_ep)
 522 {
 523         return fusb300_set_halt_and_wedge(_ep, 1, 1);
 524 }
 525
 526 static void fusb300_fifo_flush(struct usb_ep *_ep)
 527 {
 528 }
 529
 530 static struct usb_ep_ops fusb300_ep_ops = {
 531         .enable         = fusb300_enable,
 532         .disable        = fusb300_disable,
 533
 534         .alloc_request  = fusb300_alloc_request,
 535         .free_request   = fusb300_free_request,
 536
 537         .queue          = fusb300_queue,
 538         .dequeue        = fusb300_dequeue,
 539
 540         .set_halt       = fusb300_set_halt,
 541         .fifo_flush     = fusb300_fifo_flush,
 542         .set_wedge      = fusb300_set_wedge,
 543 };
 544
 545 /*****************************************************************************/
 546 static void fusb300_clear_int(struct fusb300 *fusb300, u32 offset,
 547                        u32 value)
 548 {
 549         iowrite32(value, fusb300->reg + offset);
 550 }
 551
 552 static void fusb300_reset(void)
 553 {
 554 }
 555
 556 static void fusb300_set_cxstall(struct fusb300 *fusb300)
 557 {
 558         fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
 559                            FUSB300_CSR_STL);
 560 }
 561
 562 static void fusb300_set_cxdone(struct fusb300 *fusb300)
 563 {
 564         fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
 565                            FUSB300_CSR_DONE);
 566 }
 567
 568 /* read data from cx fifo */
 569 void fusb300_rdcxf(struct fusb300 *fusb300,
 570                    u8 *buffer, u32 length)
 571 {
 572         int i = 0;
 573         u8 *tmp;
 574         u32 data;
 575
 576         tmp = buffer;
 577
 578         for (i = (length >> 2); i > 0; i--) {
 579                 data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
 580                 printk(KERN_DEBUG "    0x%x\n", data);
 581                 *tmp = data & 0xFF;
 582                 *(tmp + 1) = (data >> 8) & 0xFF;
 583                 *(tmp + 2) = (data >> 16) & 0xFF;
 584                 *(tmp + 3) = (data >> 24) & 0xFF;
 585                 tmp = tmp + 4;
 586         }
 587
 588         switch (length % 4) {
 589         case 1:
 590                 data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
 591                 printk(KERN_DEBUG "    0x%x\n", data);
 592                 *tmp = data & 0xFF;
 593                 break;
 594         case 2:
 595                 data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
 596                 printk(KERN_DEBUG "    0x%x\n", data);
 597                 *tmp = data & 0xFF;
 598                 *(tmp + 1) = (data >> 8) & 0xFF;
 599                 break;
 600         case 3:
 601                 data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
 602                 printk(KERN_DEBUG "    0x%x\n", data);
 603                 *tmp = data & 0xFF;
 604                 *(tmp + 1) = (data >> 8) & 0xFF;
 605                 *(tmp + 2) = (data >> 16) & 0xFF;
 606                 break;
 607         default:
 608                 break;
 609         }
 610 }
 611
 612 #if 0
 613 static void fusb300_dbg_fifo(struct fusb300_ep *ep,
 614                                 u8 entry, u16 length)
 615 {
 616         u32 reg;
 617         u32 i = 0;
 618         u32 j = 0;
 619
 620         reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_GTM);
 621         reg &= ~(FUSB300_GTM_TST_EP_ENTRY(0xF) |
 622                 FUSB300_GTM_TST_EP_NUM(0xF) | FUSB300_GTM_TST_FIFO_DEG);
 623         reg |= (FUSB300_GTM_TST_EP_ENTRY(entry) |
 624                 FUSB300_GTM_TST_EP_NUM(ep->epnum) | FUSB300_GTM_TST_FIFO_DEG);
 625         iowrite32(reg, ep->fusb300->reg + FUSB300_OFFSET_GTM);
 626
 627         for (i = 0; i < (length >> 2); i++) {
 628                 if (i * 4 == 1024)
 629                         break;
 630                 reg = ioread32(ep->fusb300->reg +
 631                         FUSB300_OFFSET_BUFDBG_START + i * 4);
 632                 printk(KERN_DEBUG"  0x%-8x", reg);
 633                 j++;
 634                 if ((j % 4)  == 0)
 635                         printk(KERN_DEBUG "\n");
 636         }
 637
 638         if (length % 4) {
 639                 reg = ioread32(ep->fusb300->reg +
 640                         FUSB300_OFFSET_BUFDBG_START + i * 4);
 641                 printk(KERN_DEBUG "  0x%x\n", reg);
 642         }
 643
 644         if ((j % 4)  != 0)
 645                 printk(KERN_DEBUG "\n");
 646
 647         fusb300_disable_bit(ep->fusb300, FUSB300_OFFSET_GTM,
 648                 FUSB300_GTM_TST_FIFO_DEG);
 649 }
 650
 651 static void fusb300_cmp_dbg_fifo(struct fusb300_ep *ep,
 652                                 u8 entry, u16 length, u8 *golden)
 653 {
 654         u32 reg;
 655         u32 i = 0;
 656         u32 golden_value;
 657         u8 *tmp;
 658
 659         tmp = golden;
 660
 661         printk(KERN_DEBUG "fusb300_cmp_dbg_fifo (entry %d) : start\n", entry);
 662
 663         reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_GTM);
 664         reg &= ~(FUSB300_GTM_TST_EP_ENTRY(0xF) |
 665                 FUSB300_GTM_TST_EP_NUM(0xF) | FUSB300_GTM_TST_FIFO_DEG);
 666         reg |= (FUSB300_GTM_TST_EP_ENTRY(entry) |
 667                 FUSB300_GTM_TST_EP_NUM(ep->epnum) | FUSB300_GTM_TST_FIFO_DEG);
 668         iowrite32(reg, ep->fusb300->reg + FUSB300_OFFSET_GTM);
 669
 670         for (i = 0; i < (length >> 2); i++) {
 671                 if (i * 4 == 1024)
 672                         break;
 673                 golden_value = *tmp | *(tmp + 1) << 8 |
 674                                 *(tmp + 2) << 16 | *(tmp + 3) << 24;
 675
 676                 reg = ioread32(ep->fusb300->reg +
 677                         FUSB300_OFFSET_BUFDBG_START + i*4);
 678
 679                 if (reg != golden_value) {
 680                         printk(KERN_DEBUG "0x%x  :  ", (u32)(ep->fusb300->reg +
 681                                 FUSB300_OFFSET_BUFDBG_START + i*4));
 682                         printk(KERN_DEBUG "    golden = 0x%x, reg = 0x%x\n",
 683                                 golden_value, reg);
 684                 }
 685                 tmp += 4;
 686         }
 687
 688         switch (length % 4) {
 689         case 1:
 690                 golden_value = *tmp;
 691         case 2:
 692                 golden_value = *tmp | *(tmp + 1) << 8;
 693         case 3:
 694                 golden_value = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16;
 695         default:
 696                 break;
 697
 698         reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_BUFDBG_START + i*4);
 699         if (reg != golden_value) {
 700                 printk(KERN_DEBUG "0x%x:", (u32)(ep->fusb300->reg +
 701                         FUSB300_OFFSET_BUFDBG_START + i*4));
 702                 printk(KERN_DEBUG "  golden = 0x%x, reg = 0x%x\n",
 703                         golden_value, reg);
 704         }
 705         }
 706
 707         printk(KERN_DEBUG "fusb300_cmp_dbg_fifo : end\n");
 708         fusb300_disable_bit(ep->fusb300, FUSB300_OFFSET_GTM,
 709                 FUSB300_GTM_TST_FIFO_DEG);
 710 }
 711 #endif
 712
 713 static void fusb300_rdfifo(struct fusb300_ep *ep,
 714                           struct fusb300_request *req,
 715                           u32 length)
 716 {
 717         int i = 0;
 718         u8 *tmp;
 719         u32 data, reg;
 720         struct fusb300 *fusb300 = ep->fusb300;
 721
 722         tmp = req->req.buf + req->req.actual;
 723         req->req.actual += length;
 724
 725         if (req->req.actual > req->req.length)
 726                 printk(KERN_DEBUG "req->req.actual > req->req.length\n");
 727
 728         for (i = (length >> 2); i > 0; i--) {
 729                 data = ioread32(fusb300->reg +
 730                         FUSB300_OFFSET_EPPORT(ep->epnum));
 731                 *tmp = data & 0xFF;
 732                 *(tmp + 1) = (data >> 8) & 0xFF;
 733                 *(tmp + 2) = (data >> 16) & 0xFF;
 734                 *(tmp + 3) = (data >> 24) & 0xFF;
 735                 tmp = tmp + 4;
 736         }
 737
 738         switch (length % 4) {
 739         case 1:
 740                 data = ioread32(fusb300->reg +
 741                         FUSB300_OFFSET_EPPORT(ep->epnum));
 742                 *tmp = data & 0xFF;
 743                 break;
 744         case 2:
 745                 data = ioread32(fusb300->reg +
 746                         FUSB300_OFFSET_EPPORT(ep->epnum));
 747                 *tmp = data & 0xFF;
 748                 *(tmp + 1) = (data >> 8) & 0xFF;
 749                 break;
 750         case 3:
 751                 data = ioread32(fusb300->reg +
 752                         FUSB300_OFFSET_EPPORT(ep->epnum));
 753                 *tmp = data & 0xFF;
 754                 *(tmp + 1) = (data >> 8) & 0xFF;
 755                 *(tmp + 2) = (data >> 16) & 0xFF;
 756                 break;
 757         default:
 758                 break;
 759         }
 760
 761         do {
 762                 reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
 763                 reg &= FUSB300_IGR1_SYNF0_EMPTY_INT;
 764                 if (i)
 765                         printk(KERN_INFO "sync fifo is not empty!\n");
 766                 i++;
 767         } while (!reg);
 768 }
 769
 770 static u8 fusb300_get_epnstall(struct fusb300 *fusb300, u8 ep)
 771 {
 772         u8 value;
 773         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
 774
 775         value = reg & FUSB300_EPSET0_STL;
 776
 777         return value;
 778 }
 779
 780 static u8 fusb300_get_cxstall(struct fusb300 *fusb300)
 781 {
 782         u8 value;
 783         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
 784
 785         value = (reg & FUSB300_CSR_STL) >> 1;
 786
 787         return value;
 788 }
 789
 790 static void request_error(struct fusb300 *fusb300)
 791 {
 792         fusb300_set_cxstall(fusb300);
 793         printk(KERN_DEBUG "request error!!\n");
 794 }
 795
 796 static void get_status(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
 797 __releases(fusb300->lock)
 798 __acquires(fusb300->lock)
 799 {
 800         u8 ep;
 801         u16 status = 0;
 802         u16 w_index = ctrl->wIndex;
 803
 804         switch (ctrl->bRequestType & USB_RECIP_MASK) {
 805         case USB_RECIP_DEVICE:
 806                 status = 1 << USB_DEVICE_SELF_POWERED;
 807                 break;
 808         case USB_RECIP_INTERFACE:
 809                 status = 0;
 810                 break;
 811         case USB_RECIP_ENDPOINT:
 812                 ep = w_index & USB_ENDPOINT_NUMBER_MASK;
 813                 if (ep) {
 814                         if (fusb300_get_epnstall(fusb300, ep))
 815                                 status = 1 << USB_ENDPOINT_HALT;
 816                 } else {
 817                         if (fusb300_get_cxstall(fusb300))
 818                                 status = 0;
 819                 }
 820                 break;
 821
 822         default:
 823                 request_error(fusb300);
 824                 return;         /* exit */
 825         }
 826
 827         fusb300->ep0_data = cpu_to_le16(status);
 828         fusb300->ep0_req->buf = &fusb300->ep0_data;
 829         fusb300->ep0_req->length = 2;
 830
 831         spin_unlock(&fusb300->lock);
 832         fusb300_queue(fusb300->gadget.ep0, fusb300->ep0_req, GFP_KERNEL);
 833         spin_lock(&fusb300->lock);
 834 }
 835
 836 static void set_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
 837 {
 838         u8 ep;
 839
 840         switch (ctrl->bRequestType & USB_RECIP_MASK) {
 841         case USB_RECIP_DEVICE:
 842                 fusb300_set_cxdone(fusb300);
 843                 break;
 844         case USB_RECIP_INTERFACE:
 845                 fusb300_set_cxdone(fusb300);
 846                 break;
 847         case USB_RECIP_ENDPOINT: {
 848                 u16 w_index = le16_to_cpu(ctrl->wIndex);
 849
 850                 ep = w_index & USB_ENDPOINT_NUMBER_MASK;
 851                 if (ep)
 852                         fusb300_set_epnstall(fusb300, ep);
 853                 else
 854                         fusb300_set_cxstall(fusb300);
 855                 fusb300_set_cxdone(fusb300);
 856                 }
 857                 break;
 858         default:
 859                 request_error(fusb300);
 860                 break;
 861         }
 862 }
 863
 864 static void fusb300_clear_seqnum(struct fusb300 *fusb300, u8 ep)
 865 {
 866         fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
 867                             FUSB300_EPSET0_CLRSEQNUM);
 868 }
 869
 870 static void clear_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
 871 {
 872         struct fusb300_ep *ep =
 873                 fusb300->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
 874
 875         switch (ctrl->bRequestType & USB_RECIP_MASK) {
 876         case USB_RECIP_DEVICE:
 877                 fusb300_set_cxdone(fusb300);
 878                 break;
 879         case USB_RECIP_INTERFACE:
 880                 fusb300_set_cxdone(fusb300);
 881                 break;
 882         case USB_RECIP_ENDPOINT:
 883                 if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
 884                         if (ep->wedged) {
 885                                 fusb300_set_cxdone(fusb300);
 886                                 break;
 887                         }
 888                         if (ep->stall) {
 889                                 ep->stall = 0;
 890                                 fusb300_clear_seqnum(fusb300, ep->epnum);
 891                                 fusb300_clear_epnstall(fusb300, ep->epnum);
 892                                 if (!list_empty(&ep->queue))
 893                                         enable_fifo_int(ep);
 894                         }
 895                 }
 896                 fusb300_set_cxdone(fusb300);
 897                 break;
 898         default:
 899                 request_error(fusb300);
 900                 break;
 901         }
 902 }
 903
 904 static void fusb300_set_dev_addr(struct fusb300 *fusb300, u16 addr)
 905 {
 906         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_DAR);
 907
 908         reg &= ~FUSB300_DAR_DRVADDR_MSK;
 909         reg |= FUSB300_DAR_DRVADDR(addr);
 910
 911         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_DAR);
 912 }
 913
 914 static void set_address(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
 915 {
 916         if (ctrl->wValue >= 0x0100)
 917                 request_error(fusb300);
 918         else {
 919                 fusb300_set_dev_addr(fusb300, ctrl->wValue);
 920                 fusb300_set_cxdone(fusb300);
 921         }
 922 }
 923
 924 #define UVC_COPY_DESCRIPTORS(mem, src) \
 925         do { \
 926                 const struct usb_descriptor_header * const *__src; \
 927                 for (__src = src; *__src; ++__src) { \
 928                         memcpy(mem, *__src, (*__src)->bLength); \
 929                         mem += (*__src)->bLength; \
 930                 } \
 931         } while (0)
 932
 933 static int setup_packet(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
 934 {
 935         u8 *p = (u8 *)ctrl;
 936         u8 ret = 0;
 937         u8 i = 0;
 938
 939         fusb300_rdcxf(fusb300, p, 8);
 940         fusb300->ep0_dir = ctrl->bRequestType & USB_DIR_IN;
 941         fusb300->ep0_length = ctrl->wLength;
 942
 943         /* check request */
 944         if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
 945                 switch (ctrl->bRequest) {
 946                 case USB_REQ_GET_STATUS:
 947                         get_status(fusb300, ctrl);
 948                         break;
 949                 case USB_REQ_CLEAR_FEATURE:
 950                         clear_feature(fusb300, ctrl);
 951                         break;
 952                 case USB_REQ_SET_FEATURE:
 953                         set_feature(fusb300, ctrl);
 954                         break;
 955                 case USB_REQ_SET_ADDRESS:
 956                         set_address(fusb300, ctrl);
 957                         break;
 958                 case USB_REQ_SET_CONFIGURATION:
 959                         fusb300_enable_bit(fusb300, FUSB300_OFFSET_DAR,
 960                                            FUSB300_DAR_SETCONFG);
 961                         /* clear sequence number */
 962                         for (i = 1; i <= FUSB300_MAX_NUM_EP; i++)
 963                                 fusb300_clear_seqnum(fusb300, i);
 964                         fusb300->reenum = 1;
 965                         ret = 1;
 966                         break;
 967                 default:
 968                         ret = 1;
 969                         break;
 970                 }
 971         } else
 972                 ret = 1;
 973
 974         return ret;
 975 }
 976
 977 static void done(struct fusb300_ep *ep, struct fusb300_request *req,
 978                  int status)
 979 {
 980         list_del_init(&req->queue);
 981
 982         /* don't modify queue heads during completion callback */
 983         if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
 984                 req->req.status = -ESHUTDOWN;
 985         else
 986                 req->req.status = status;
 987
 988         spin_unlock(&ep->fusb300->lock);
 989         req->req.complete(&ep->ep, &req->req);
 990         spin_lock(&ep->fusb300->lock);
 991
 992         if (ep->epnum) {
 993                 disable_fifo_int(ep);
 994                 if (!list_empty(&ep->queue))
 995                         enable_fifo_int(ep);
 996         } else
 997                 fusb300_set_cxdone(ep->fusb300);
 998 }
 999
1000 static void fusb300_fill_idma_prdtbl(struct fusb300_ep *ep, dma_addr_t d,
1001                 u32 len)
1002 {
1003         u32 value;
1004         u32 reg;
1005
1006         /* wait SW owner */
1007         do {
1008                 reg = ioread32(ep->fusb300->reg +
1009                         FUSB300_OFFSET_EPPRD_W0(ep->epnum));
1010                 reg &= FUSB300_EPPRD0_H;
1011         } while (reg);
1012
1013         iowrite32(d, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W1(ep->epnum));
1014
1015         value = FUSB300_EPPRD0_BTC(len) | FUSB300_EPPRD0_H |
1016                 FUSB300_EPPRD0_F | FUSB300_EPPRD0_L | FUSB300_EPPRD0_I;
1017         iowrite32(value, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W0(ep->epnum));
1018
1019         iowrite32(0x0, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W2(ep->epnum));
1020
1021         fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_EPPRDRDY,
1022                 FUSB300_EPPRDR_EP_PRD_RDY(ep->epnum));
1023 }
1024
1025 static void fusb300_wait_idma_finished(struct fusb300_ep *ep)
1026 {
1027         u32 reg;
1028
1029         do {
1030                 reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR1);
1031                 if ((reg & FUSB300_IGR1_VBUS_CHG_INT) ||
1032                     (reg & FUSB300_IGR1_WARM_RST_INT) ||
1033                     (reg & FUSB300_IGR1_HOT_RST_INT) ||
1034                     (reg & FUSB300_IGR1_USBRST_INT)
1035                 )
1036                         goto IDMA_RESET;
1037                 reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR0);
1038                 reg &= FUSB300_IGR0_EPn_PRD_INT(ep->epnum);
1039         } while (!reg);
1040
1041         fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGR0,
1042                 FUSB300_IGR0_EPn_PRD_INT(ep->epnum));
1043 IDMA_RESET:
1044         fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGER0,
1045                 FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
1046 }
1047
1048 static void  fusb300_set_idma(struct fusb300_ep *ep,
1049                         struct fusb300_request *req)
1050 {
1051         dma_addr_t d;
1052
1053         d = dma_map_single(NULL, req->req.buf, req->req.length, DMA_TO_DEVICE);
1054
1055         if (dma_mapping_error(NULL, d)) {
1056                 printk(KERN_DEBUG "dma_mapping_error\n");
1057                 return;
1058         }
1059
1060         dma_sync_single_for_device(NULL, d, req->req.length, DMA_TO_DEVICE);
1061
1062         fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER0,
1063                 FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
1064
1065         fusb300_fill_idma_prdtbl(ep, d, req->req.length);
1066         /* check idma is done */
1067         fusb300_wait_idma_finished(ep);
1068
1069         dma_unmap_single(NULL, d, req->req.length, DMA_TO_DEVICE);
1070 }
1071
1072 static void in_ep_fifo_handler(struct fusb300_ep *ep)
1073 {
1074         struct fusb300_request *req = list_entry(ep->queue.next,
1075                                         struct fusb300_request, queue);
1076
1077         if (req->req.length)
1078                 fusb300_set_idma(ep, req);
1079         done(ep, req, 0);
1080 }
1081
1082 static void out_ep_fifo_handler(struct fusb300_ep *ep)
1083 {
1084         struct fusb300 *fusb300 = ep->fusb300;
1085         struct fusb300_request *req = list_entry(ep->queue.next,
1086                                                  struct fusb300_request, queue);
1087         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPFFR(ep->epnum));
1088         u32 length = reg & FUSB300_FFR_BYCNT;
1089
1090         fusb300_rdfifo(ep, req, length);
1091
1092         /* finish out transfer */
1093         if ((req->req.length == req->req.actual) || (length < ep->ep.maxpacket))
1094                 done(ep, req, 0);
1095 }
1096
1097 static void check_device_mode(struct fusb300 *fusb300)
1098 {
1099         u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_GCR);
1100
1101         switch (reg & FUSB300_GCR_DEVEN_MSK) {
1102         case FUSB300_GCR_DEVEN_SS:
1103                 fusb300->gadget.speed = USB_SPEED_SUPER;
1104                 break;
1105         case FUSB300_GCR_DEVEN_HS:
1106                 fusb300->gadget.speed = USB_SPEED_HIGH;
1107                 break;
1108         case FUSB300_GCR_DEVEN_FS:
1109                 fusb300->gadget.speed = USB_SPEED_FULL;
1110                 break;
1111         default:
1112                 fusb300->gadget.speed = USB_SPEED_UNKNOWN;
1113                 break;
1114         }
1115         printk(KERN_INFO "dev_mode = %d\n", (reg & FUSB300_GCR_DEVEN_MSK));
1116 }
1117
1118
1119 static void fusb300_ep0out(struct fusb300 *fusb300)
1120 {
1121         struct fusb300_ep *ep = fusb300->ep[0];
1122         u32 reg;
1123
1124         if (!list_empty(&ep->queue)) {
1125                 struct fusb300_request *req;
1126
1127                 req = list_first_entry(&ep->queue,
1128                         struct fusb300_request, queue);
1129                 if (req->req.length)
1130                         fusb300_rdcxf(ep->fusb300, req->req.buf,
1131                                 req->req.length);
1132                 done(ep, req, 0);
1133                 reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
1134                 reg &= ~FUSB300_IGER1_CX_OUT_INT;
1135                 iowrite32(reg, fusb300->reg + FUSB300_OFFSET_IGER1);
1136         } else
1137                 pr_err("%s : empty queue\n", __func__);
1138 }
1139
1140 static void fusb300_ep0in(struct fusb300 *fusb300)
1141 {
1142         struct fusb300_request *req;
1143         struct fusb300_ep *ep = fusb300->ep[0];
1144
1145         if ((!list_empty(&ep->queue)) && (fusb300->ep0_dir)) {
1146                 req = list_entry(ep->queue.next,
1147                                 struct fusb300_request, queue);
1148                 if (req->req.length)
1149                         fusb300_wrcxf(ep, req);
1150                 if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
1151                         done(ep, req, 0);
1152         } else
1153                 fusb300_set_cxdone(fusb300);
1154 }
1155
1156 static void fusb300_grp2_handler(void)
1157 {
1158 }
1159
1160 static void fusb300_grp3_handler(void)
1161 {
1162 }
1163
1164 static void fusb300_grp4_handler(void)
1165 {
1166 }
1167
1168 static void fusb300_grp5_handler(void)
1169 {
1170 }
1171
1172 static irqreturn_t fusb300_irq(int irq, void *_fusb300)
1173 {
1174         struct fusb300 *fusb300 = _fusb300;
1175         u32 int_grp1 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
1176         u32 int_grp1_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
1177         u32 int_grp0 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR0);
1178         u32 int_grp0_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER0);
1179         struct usb_ctrlrequest ctrl;
1180         u8 in;
1181         u32 reg;
1182         int i;
1183
1184         spin_lock(&fusb300->lock);
1185
1186         int_grp1 &= int_grp1_en;
1187         int_grp0 &= int_grp0_en;
1188
1189         if (int_grp1 & FUSB300_IGR1_WARM_RST_INT) {
1190                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1191                                   FUSB300_IGR1_WARM_RST_INT);
1192                 printk(KERN_INFO"fusb300_warmreset\n");
1193                 fusb300_reset();
1194         }
1195
1196         if (int_grp1 & FUSB300_IGR1_HOT_RST_INT) {
1197                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1198                                   FUSB300_IGR1_HOT_RST_INT);
1199                 printk(KERN_INFO"fusb300_hotreset\n");
1200                 fusb300_reset();
1201         }
1202
1203         if (int_grp1 & FUSB300_IGR1_USBRST_INT) {
1204                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1205                                   FUSB300_IGR1_USBRST_INT);
1206                 fusb300_reset();
1207         }
1208         /* COMABT_INT has a highest priority */
1209
1210         if (int_grp1 & FUSB300_IGR1_CX_COMABT_INT) {
1211                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1212                                   FUSB300_IGR1_CX_COMABT_INT);
1213                 printk(KERN_INFO"fusb300_ep0abt\n");
1214         }
1215
1216         if (int_grp1 & FUSB300_IGR1_VBUS_CHG_INT) {
1217                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1218                                   FUSB300_IGR1_VBUS_CHG_INT);
1219                 printk(KERN_INFO"fusb300_vbus_change\n");
1220         }
1221
1222         if (int_grp1 & FUSB300_IGR1_U3_EXIT_FAIL_INT) {
1223                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1224                                   FUSB300_IGR1_U3_EXIT_FAIL_INT);
1225         }
1226
1227         if (int_grp1 & FUSB300_IGR1_U2_EXIT_FAIL_INT) {
1228                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1229                                   FUSB300_IGR1_U2_EXIT_FAIL_INT);
1230         }
1231
1232         if (int_grp1 & FUSB300_IGR1_U1_EXIT_FAIL_INT) {
1233                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1234                                   FUSB300_IGR1_U1_EXIT_FAIL_INT);
1235         }
1236
1237         if (int_grp1 & FUSB300_IGR1_U2_ENTRY_FAIL_INT) {
1238                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1239                                   FUSB300_IGR1_U2_ENTRY_FAIL_INT);
1240         }
1241
1242         if (int_grp1 & FUSB300_IGR1_U1_ENTRY_FAIL_INT) {
1243                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1244                                   FUSB300_IGR1_U1_ENTRY_FAIL_INT);
1245         }
1246
1247         if (int_grp1 & FUSB300_IGR1_U3_EXIT_INT) {
1248                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1249                                   FUSB300_IGR1_U3_EXIT_INT);
1250                 printk(KERN_INFO "FUSB300_IGR1_U3_EXIT_INT\n");
1251         }
1252
1253         if (int_grp1 & FUSB300_IGR1_U2_EXIT_INT) {
1254                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1255                                   FUSB300_IGR1_U2_EXIT_INT);
1256                 printk(KERN_INFO "FUSB300_IGR1_U2_EXIT_INT\n");
1257         }
1258
1259         if (int_grp1 & FUSB300_IGR1_U1_EXIT_INT) {
1260                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1261                                   FUSB300_IGR1_U1_EXIT_INT);
1262                 printk(KERN_INFO "FUSB300_IGR1_U1_EXIT_INT\n");
1263         }
1264
1265         if (int_grp1 & FUSB300_IGR1_U3_ENTRY_INT) {
1266                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1267                                   FUSB300_IGR1_U3_ENTRY_INT);
1268                 printk(KERN_INFO "FUSB300_IGR1_U3_ENTRY_INT\n");
1269                 fusb300_enable_bit(fusb300, FUSB300_OFFSET_SSCR1,
1270                                    FUSB300_SSCR1_GO_U3_DONE);
1271         }
1272
1273         if (int_grp1 & FUSB300_IGR1_U2_ENTRY_INT) {
1274                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1275                                   FUSB300_IGR1_U2_ENTRY_INT);
1276                 printk(KERN_INFO "FUSB300_IGR1_U2_ENTRY_INT\n");
1277         }
1278
1279         if (int_grp1 & FUSB300_IGR1_U1_ENTRY_INT) {
1280                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1281                                   FUSB300_IGR1_U1_ENTRY_INT);
1282                 printk(KERN_INFO "FUSB300_IGR1_U1_ENTRY_INT\n");
1283         }
1284
1285         if (int_grp1 & FUSB300_IGR1_RESM_INT) {
1286                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1287                                   FUSB300_IGR1_RESM_INT);
1288                 printk(KERN_INFO "fusb300_resume\n");
1289         }
1290
1291         if (int_grp1 & FUSB300_IGR1_SUSP_INT) {
1292                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1293                                   FUSB300_IGR1_SUSP_INT);
1294                 printk(KERN_INFO "fusb300_suspend\n");
1295         }
1296
1297         if (int_grp1 & FUSB300_IGR1_HS_LPM_INT) {
1298                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1299                                   FUSB300_IGR1_HS_LPM_INT);
1300                 printk(KERN_INFO "fusb300_HS_LPM_INT\n");
1301         }
1302
1303         if (int_grp1 & FUSB300_IGR1_DEV_MODE_CHG_INT) {
1304                 fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1305                                   FUSB300_IGR1_DEV_MODE_CHG_INT);
1306                 check_device_mode(fusb300);
1307         }
1308
1309         if (int_grp1 & FUSB300_IGR1_CX_COMFAIL_INT) {
1310                 fusb300_set_cxstall(fusb300);
1311                 printk(KERN_INFO "fusb300_ep0fail\n");
1312         }
1313
1314         if (int_grp1 & FUSB300_IGR1_CX_SETUP_INT) {
1315                 printk(KERN_INFO "fusb300_ep0setup\n");
1316                 if (setup_packet(fusb300, &ctrl)) {
1317                         spin_unlock(&fusb300->lock);
1318                         if (fusb300->driver->setup(&fusb300->gadget, &ctrl) < 0)
1319                                 fusb300_set_cxstall(fusb300);
1320                         spin_lock(&fusb300->lock);
1321                 }
1322         }
1323
1324         if (int_grp1 & FUSB300_IGR1_CX_CMDEND_INT)
1325                 printk(KERN_INFO "fusb300_cmdend\n");
1326
1327
1328         if (int_grp1 & FUSB300_IGR1_CX_OUT_INT) {
1329                 printk(KERN_INFO "fusb300_cxout\n");
1330                 fusb300_ep0out(fusb300);
1331         }
1332
1333         if (int_grp1 & FUSB300_IGR1_CX_IN_INT) {
1334                 printk(KERN_INFO "fusb300_cxin\n");
1335                 fusb300_ep0in(fusb300);
1336         }
1337
1338         if (int_grp1 & FUSB300_IGR1_INTGRP5)
1339                 fusb300_grp5_handler();
1340
1341         if (int_grp1 & FUSB300_IGR1_INTGRP4)
1342                 fusb300_grp4_handler();
1343
1344         if (int_grp1 & FUSB300_IGR1_INTGRP3)
1345                 fusb300_grp3_handler();
1346
1347         if (int_grp1 & FUSB300_IGR1_INTGRP2)
1348                 fusb300_grp2_handler();
1349
1350         if (int_grp0) {
1351                 for (i = 1; i < FUSB300_MAX_NUM_EP; i++) {
1352                         if (int_grp0 & FUSB300_IGR0_EPn_FIFO_INT(i)) {
1353                                 reg = ioread32(fusb300->reg +
1354                                         FUSB300_OFFSET_EPSET1(i));
1355                                 in = (reg & FUSB300_EPSET1_DIRIN) ? 1 : 0;
1356                                 if (in)
1357                                         in_ep_fifo_handler(fusb300->ep[i]);
1358                                 else
1359                                         out_ep_fifo_handler(fusb300->ep[i]);
1360                         }
1361                 }
1362         }
1363
1364         spin_unlock(&fusb300->lock);
1365
1366         return IRQ_HANDLED;
1367 }
1368
1369 static void fusb300_set_u2_timeout(struct fusb300 *fusb300,
1370                                    u32 time)
1371 {
1372         u32 reg;
1373
1374         reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
1375         reg &= ~0xff;
1376         reg |= FUSB300_SSCR2_U2TIMEOUT(time);
1377
1378         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
1379 }
1380
1381 static void fusb300_set_u1_timeout(struct fusb300 *fusb300,
1382                                    u32 time)
1383 {
1384         u32 reg;
1385
1386         reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
1387         reg &= ~(0xff << 8);
1388         reg |= FUSB300_SSCR2_U1TIMEOUT(time);
1389
1390         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
1391 }
1392
1393 static void init_controller(struct fusb300 *fusb300)
1394 {
1395         u32 reg;
1396         u32 mask = 0;
1397         u32 val = 0;
1398
1399         /* split on */
1400         mask = val = FUSB300_AHBBCR_S0_SPLIT_ON | FUSB300_AHBBCR_S1_SPLIT_ON;
1401         reg = ioread32(fusb300->reg + FUSB300_OFFSET_AHBCR);
1402         reg &= ~mask;
1403         reg |= val;
1404         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_AHBCR);
1405
1406         /* enable high-speed LPM */
1407         mask = val = FUSB300_HSCR_HS_LPM_PERMIT;
1408         reg = ioread32(fusb300->reg + FUSB300_OFFSET_HSCR);
1409         reg &= ~mask;
1410         reg |= val;
1411         iowrite32(reg, fusb300->reg + FUSB300_OFFSET_HSCR);
1412
1413         /*set u1 u2 timmer*/
1414         fusb300_set_u2_timeout(fusb300, 0xff);
1415         fusb300_set_u1_timeout(fusb300, 0xff);
1416
1417         /* enable all grp1 interrupt */
1418         iowrite32(0xcfffff9f, fusb300->reg + FUSB300_OFFSET_IGER1);
1419 }
1420 /*------------------------------------------------------------------------*/
1421 static struct fusb300 *the_controller;
1422
1423 static int fusb300_udc_start(struct usb_gadget_driver *driver,
1424                 int (*bind)(struct usb_gadget *))
1425 {
1426         struct fusb300 *fusb300 = the_controller;
1427         int retval;
1428
1429         if (!driver
1430                         || driver->speed < USB_SPEED_FULL
1431                         || !bind
1432                         || !driver->setup)
1433                 return -EINVAL;
1434
1435         if (!fusb300)
1436                 return -ENODEV;
1437
1438         if (fusb300->driver)
1439                 return -EBUSY;
1440
1441         /* hook up the driver */
1442         driver->driver.bus = NULL;
1443         fusb300->driver = driver;
1444         fusb300->gadget.dev.driver = &driver->driver;
1445
1446         retval = device_add(&fusb300->gadget.dev);
1447         if (retval) {
1448                 pr_err("device_add error (%d)\n", retval);
1449                 goto error;
1450         }
1451
1452         retval = bind(&fusb300->gadget);
1453         if (retval) {
1454                 pr_err("bind to driver error (%d)\n", retval);
1455                 device_del(&fusb300->gadget.dev);
1456                 goto error;
1457         }
1458
1459         return 0;
1460
1461 error:
1462         fusb300->driver = NULL;
1463         fusb300->gadget.dev.driver = NULL;
1464
1465         return retval;
1466 }
1467
1468 static int fusb300_udc_stop(struct usb_gadget_driver *driver)
1469 {
1470         struct fusb300 *fusb300 = the_controller;
1471
1472         if (driver != fusb300->driver || !driver->unbind)
1473                 return -EINVAL;
1474
1475         driver->unbind(&fusb300->gadget);
1476         fusb300->gadget.dev.driver = NULL;
1477
1478         init_controller(fusb300);
1479         device_del(&fusb300->gadget.dev);
1480         fusb300->driver = NULL;
1481
1482         return 0;
1483 }
1484 /*--------------------------------------------------------------------------*/
1485
1486 static int fusb300_udc_pullup(struct usb_gadget *_gadget, int is_active)
1487 {
1488         return 0;
1489 }
1490
1491 static struct usb_gadget_ops fusb300_gadget_ops = {
1492         .pullup         = fusb300_udc_pullup,
1493         .start          = fusb300_udc_start,
1494         .stop           = fusb300_udc_stop,
1495 };
1496
1497 static int __exit fusb300_remove(struct platform_device *pdev)
1498 {
1499         struct fusb300 *fusb300 = dev_get_drvdata(&pdev->dev);
1500
1501         usb_del_gadget_udc(&fusb300->gadget);
1502         iounmap(fusb300->reg);
1503         free_irq(platform_get_irq(pdev, 0), fusb300);
1504
1505         fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
1506         kfree(fusb300);
1507
1508         return 0;
1509 }
1510
1511 static int __init fusb300_probe(struct platform_device *pdev)
1512 {
1513         struct resource *res, *ires, *ires1;
1514         void __iomem *reg = NULL;
1515         struct fusb300 *fusb300 = NULL;
1516         struct fusb300_ep *_ep[FUSB300_MAX_NUM_EP];
1517         int ret = 0;
1518         int i;
1519
1520         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1521         if (!res) {
1522                 ret = -ENODEV;
1523                 pr_err("platform_get_resource error.\n");
1524                 goto clean_up;
1525         }
1526
1527         ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1528         if (!ires) {
1529                 ret = -ENODEV;
1530                 dev_err(&pdev->dev,
1531                         "platform_get_resource IORESOURCE_IRQ error.\n");
1532                 goto clean_up;
1533         }
1534
1535         ires1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1536         if (!ires1) {
1537                 ret = -ENODEV;
1538                 dev_err(&pdev->dev,
1539                         "platform_get_resource IORESOURCE_IRQ 1 error.\n");
1540                 goto clean_up;
1541         }
1542
1543         reg = ioremap(res->start, resource_size(res));
1544         if (reg == NULL) {
1545                 ret = -ENOMEM;
1546                 pr_err("ioremap error.\n");
1547                 goto clean_up;
1548         }
1549
1550         /* initialize udc */
1551         fusb300 = kzalloc(sizeof(struct fusb300), GFP_KERNEL);
1552         if (fusb300 == NULL) {
1553                 pr_err("kzalloc error\n");
1554                 goto clean_up;
1555         }
1556
1557         for (i = 0; i < FUSB300_MAX_NUM_EP; i++) {
1558                 _ep[i] = kzalloc(sizeof(struct fusb300_ep), GFP_KERNEL);
1559                 if (_ep[i] == NULL) {
1560                         pr_err("_ep kzalloc error\n");
1561                         goto clean_up;
1562                 }
1563                 fusb300->ep[i] = _ep[i];
1564         }
1565
1566         spin_lock_init(&fusb300->lock);
1567
1568         dev_set_drvdata(&pdev->dev, fusb300);
1569
1570         fusb300->gadget.ops = &fusb300_gadget_ops;
1571
1572         device_initialize(&fusb300->gadget.dev);
1573
1574         dev_set_name(&fusb300->gadget.dev, "gadget");
1575
1576         fusb300->gadget.is_dualspeed = 1;
1577         fusb300->gadget.dev.parent = &pdev->dev;
1578         fusb300->gadget.dev.dma_mask = pdev->dev.dma_mask;
1579         fusb300->gadget.dev.release = pdev->dev.release;
1580         fusb300->gadget.name = udc_name;
1581         fusb300->reg = reg;
1582
1583         ret = request_irq(ires->start, fusb300_irq, IRQF_DISABLED | IRQF_SHARED,
1584                           udc_name, fusb300);
1585         if (ret < 0) {
1586                 pr_err("request_irq error (%d)\n", ret);
1587                 goto clean_up;
1588         }
1589
1590         ret = request_irq(ires1->start, fusb300_irq,
1591                         IRQF_DISABLED | IRQF_SHARED, udc_name, fusb300);
1592         if (ret < 0) {
1593                 pr_err("request_irq1 error (%d)\n", ret);
1594                 goto clean_up;
1595         }
1596
1597         INIT_LIST_HEAD(&fusb300->gadget.ep_list);
1598
1599         for (i = 0; i < FUSB300_MAX_NUM_EP ; i++) {
1600                 struct fusb300_ep *ep = fusb300->ep[i];
1601
1602                 if (i != 0) {
1603                         INIT_LIST_HEAD(&fusb300->ep[i]->ep.ep_list);
1604                         list_add_tail(&fusb300->ep[i]->ep.ep_list,
1605                                      &fusb300->gadget.ep_list);
1606                 }
1607                 ep->fusb300 = fusb300;
1608                 INIT_LIST_HEAD(&ep->queue);
1609                 ep->ep.name = fusb300_ep_name[i];
1610                 ep->ep.ops = &fusb300_ep_ops;
1611                 ep->ep.maxpacket = HS_BULK_MAX_PACKET_SIZE;
1612         }
1613         fusb300->ep[0]->ep.maxpacket = HS_CTL_MAX_PACKET_SIZE;
1614         fusb300->ep[0]->epnum = 0;
1615         fusb300->gadget.ep0 = &fusb300->ep[0]->ep;
1616         INIT_LIST_HEAD(&fusb300->gadget.ep0->ep_list);
1617
1618         the_controller = fusb300;
1619
1620         fusb300->ep0_req = fusb300_alloc_request(&fusb300->ep[0]->ep,
1621                                 GFP_KERNEL);
1622         if (fusb300->ep0_req == NULL)
1623                 goto clean_up3;
1624
1625         init_controller(fusb300);
1626         ret = usb_add_gadget_udc(&pdev->dev, &fusb300->gadget);
1627         if (ret)
1628                 goto err_add_udc;
1629
1630         dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1631
1632         return 0;
1633 err_add_udc:
1634         fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
1635
1636 clean_up3:
1637         free_irq(ires->start, fusb300);
1638
1639 clean_up:
1640         if (fusb300) {
1641                 if (fusb300->ep0_req)
1642                         fusb300_free_request(&fusb300->ep[0]->ep,
1643                                 fusb300->ep0_req);
1644                 kfree(fusb300);
1645         }
1646         if (reg)
1647                 iounmap(reg);
1648
1649         return ret;
1650 }
1651
1652 static struct platform_driver fusb300_driver = {
1653         .remove =       __exit_p(fusb300_remove),
1654         .driver         = {
1655                 .name = (char *) udc_name,
1656                 .owner  = THIS_MODULE,
1657         },
1658 };
1659
1660 static int __init fusb300_udc_init(void)
1661 {
1662         return platform_driver_probe(&fusb300_driver, fusb300_probe);
1663 }
1664
1665 module_init(fusb300_udc_init);
1666
1667 static void __exit fusb300_udc_cleanup(void)
1668 {
1669         platform_driver_unregister(&fusb300_driver);
1670 }
1671 module_exit(fusb300_udc_cleanup);