drivers/usb/renesas_usbhs/mod_gadget.c

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  15  *
  16  */
  17 #include <linux/io.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/usb/ch9.h>
  21 #include <linux/usb/gadget.h>
  22 #include "common.h"
  23
  24 /*
  25  *              struct
  26  */
  27 struct usbhsg_request {
  28         struct usb_request      req;
  29         struct usbhs_pkt        pkt;
  30 };
  31
  32 #define EP_NAME_SIZE 8
  33 struct usbhsg_gpriv;
  34 struct usbhsg_uep {
  35         struct usb_ep            ep;
  36         struct usbhs_pipe       *pipe;
  37
  38         char ep_name[EP_NAME_SIZE];
  39
  40         struct usbhsg_gpriv *gpriv;
  41         struct usbhs_pkt_handle *handler;
  42 };
  43
  44 struct usbhsg_gpriv {
  45         struct usb_gadget        gadget;
  46         struct usbhs_mod         mod;
  47
  48         struct usbhsg_uep       *uep;
  49         int                      uep_size;
  50
  51         struct usb_gadget_driver        *driver;
  52
  53         u32     status;
  54 #define USBHSG_STATUS_STARTED           (1 << 0)
  55 #define USBHSG_STATUS_REGISTERD         (1 << 1)
  56 #define USBHSG_STATUS_WEDGE             (1 << 2)
  57 };
  58
  59 struct usbhsg_recip_handle {
  60         char *name;
  61         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  62                       struct usb_ctrlrequest *ctrl);
  63         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  64                          struct usb_ctrlrequest *ctrl);
  65         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  66                         struct usb_ctrlrequest *ctrl);
  67 };
  68
  69 /*
  70  *              macro
  71  */
  72 #define usbhsg_priv_to_gpriv(priv)                      \
  73         container_of(                                   \
  74                 usbhs_mod_get(priv, USBHS_GADGET),      \
  75                 struct usbhsg_gpriv, mod)
  76
  77 #define __usbhsg_for_each_uep(start, pos, g, i) \
  78         for (i = start, pos = (g)->uep;         \
  79              i < (g)->uep_size;                 \
  80              i++, pos = (g)->uep + i)
  81
  82 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  83         __usbhsg_for_each_uep(1, pos, gpriv, i)
  84
  85 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  86         __usbhsg_for_each_uep(0, pos, gpriv, i)
  87
  88 #define usbhsg_gadget_to_gpriv(g)\
  89         container_of(g, struct usbhsg_gpriv, gadget)
  90
  91 #define usbhsg_req_to_ureq(r)\
  92         container_of(r, struct usbhsg_request, req)
  93
  94 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
  95 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
  96 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
  97 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
  98 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
  99 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 100 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 101 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 102 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 103
 104 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
 105 #define usbhsg_pkt_to_ureq(i)   \
 106         container_of(i, struct usbhsg_request, pkt)
 107
 108 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 109
 110 /* status */
 111 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 112 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 113 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 114 #define usbhsg_status_has(gp, b) (gp->status &   b)
 115
 116 /*
 117  *              list push/pop
 118  */
 119 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 120                               struct usbhsg_request *ureq)
 121 {
 122         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 123         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 124         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 125         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 126         struct usb_request *req = &ureq->req;
 127
 128         req->actual = 0;
 129         req->status = -EINPROGRESS;
 130         usbhs_pkt_push(pipe, pkt, uep->handler,
 131                        req->buf, req->length, req->zero);
 132
 133         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 134                 usbhs_pipe_number(pipe),
 135                 req->length);
 136 }
 137
 138 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 139                              struct usbhsg_request *ureq,
 140                              int status)
 141 {
 142         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 143         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 144         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 145
 146         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 147
 148         ureq->req.status = status;
 149         ureq->req.complete(&uep->ep, &ureq->req);
 150 }
 151
 152 static void usbhsg_queue_done(struct usbhs_pkt *pkt)
 153 {
 154         struct usbhs_pipe *pipe = pkt->pipe;
 155         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 156         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 157
 158         ureq->req.actual = pkt->actual;
 159
 160         usbhsg_queue_pop(uep, ureq, 0);
 161 }
 162
 163 static int usbhsg_dma_map(struct device *dev,
 164                           struct usbhs_pkt *pkt,
 165                           enum dma_data_direction dir)
 166 {
 167         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 168         struct usb_request *req = &ureq->req;
 169
 170         if (pkt->dma != DMA_ADDR_INVALID) {
 171                 dev_err(dev, "dma is already mapped\n");
 172                 return -EIO;
 173         }
 174
 175         if (req->dma == DMA_ADDR_INVALID) {
 176                 pkt->dma = dma_map_single(dev, pkt->buf, pkt->length, dir);
 177         } else {
 178                 dma_sync_single_for_device(dev, req->dma, req->length, dir);
 179                 pkt->dma = req->dma;
 180         }
 181
 182         if (dma_mapping_error(dev, pkt->dma)) {
 183                 dev_err(dev, "dma mapping error %x\n", pkt->dma);
 184                 return -EIO;
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int usbhsg_dma_unmap(struct device *dev,
 191                             struct usbhs_pkt *pkt,
 192                             enum dma_data_direction dir)
 193 {
 194         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 195         struct usb_request *req = &ureq->req;
 196
 197         if (pkt->dma == DMA_ADDR_INVALID) {
 198                 dev_err(dev, "dma is not mapped\n");
 199                 return -EIO;
 200         }
 201
 202         if (req->dma == DMA_ADDR_INVALID)
 203                 dma_unmap_single(dev, pkt->dma, pkt->length, dir);
 204         else
 205                 dma_sync_single_for_cpu(dev, req->dma, req->length, dir);
 206
 207         pkt->dma = DMA_ADDR_INVALID;
 208
 209         return 0;
 210 }
 211
 212 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 213 {
 214         struct usbhs_pipe *pipe = pkt->pipe;
 215         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 216         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 217         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 218         enum dma_data_direction dir;
 219
 220         dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
 221
 222         if (map)
 223                 return usbhsg_dma_map(dev, pkt, dir);
 224         else
 225                 return usbhsg_dma_unmap(dev, pkt, dir);
 226 }
 227
 228 /*
 229  *              USB_TYPE_STANDARD / clear feature functions
 230  */
 231 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 232                                                  struct usbhsg_uep *uep,
 233                                                  struct usb_ctrlrequest *ctrl)
 234 {
 235         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 236         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 237         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 238
 239         usbhs_dcp_control_transfer_done(pipe);
 240
 241         return 0;
 242 }
 243
 244 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 245                                                    struct usbhsg_uep *uep,
 246                                                    struct usb_ctrlrequest *ctrl)
 247 {
 248         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 249         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 250
 251         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 252                 usbhs_pipe_disable(pipe);
 253                 usbhs_pipe_clear_sequence(pipe);
 254                 usbhs_pipe_enable(pipe);
 255         }
 256
 257         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 258
 259         return 0;
 260 }
 261
 262 struct usbhsg_recip_handle req_clear_feature = {
 263         .name           = "clear feature",
 264         .device         = usbhsg_recip_handler_std_control_done,
 265         .interface      = usbhsg_recip_handler_std_control_done,
 266         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 267 };
 268
 269 /*
 270  *              USB_TYPE handler
 271  */
 272 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 273                                    struct usbhsg_recip_handle *handler,
 274                                    struct usb_ctrlrequest *ctrl)
 275 {
 276         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 277         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 278         struct usbhsg_uep *uep;
 279         struct usbhs_pipe *pipe;
 280         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 281         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 282         int ret;
 283         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 284                     struct usb_ctrlrequest *ctrl);
 285         char *msg;
 286
 287         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 288         pipe = usbhsg_uep_to_pipe(uep);
 289         if (!pipe) {
 290                 dev_err(dev, "wrong recip request\n");
 291                 ret = -EINVAL;
 292                 goto usbhsg_recip_run_handle_end;
 293         }
 294
 295         switch (recip) {
 296         case USB_RECIP_DEVICE:
 297                 msg     = "DEVICE";
 298                 func    = handler->device;
 299                 break;
 300         case USB_RECIP_INTERFACE:
 301                 msg     = "INTERFACE";
 302                 func    = handler->interface;
 303                 break;
 304         case USB_RECIP_ENDPOINT:
 305                 msg     = "ENDPOINT";
 306                 func    = handler->endpoint;
 307                 break;
 308         default:
 309                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 310                 func = NULL;
 311                 ret = -EINVAL;
 312         }
 313
 314         if (func) {
 315                 unsigned long flags;
 316
 317                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 318
 319                 /********************  spin lock ********************/
 320                 usbhs_lock(priv, flags);
 321                 ret = func(priv, uep, ctrl);
 322                 usbhs_unlock(priv, flags);
 323                 /********************  spin unlock ******************/
 324         }
 325
 326 usbhsg_recip_run_handle_end:
 327         usbhs_pkt_start(pipe);
 328
 329         return ret;
 330 }
 331
 332 /*
 333  *              irq functions
 334  *
 335  * it will be called from usbhs_interrupt
 336  */
 337 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 338                                 struct usbhs_irq_state *irq_state)
 339 {
 340         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 341         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 342
 343         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
 344
 345         dev_dbg(dev, "state = %x : speed : %d\n",
 346                 usbhs_status_get_device_state(irq_state),
 347                 gpriv->gadget.speed);
 348
 349         return 0;
 350 }
 351
 352 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 353                                  struct usbhs_irq_state *irq_state)
 354 {
 355         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 356         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 357         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 358         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 359         struct usb_ctrlrequest ctrl;
 360         struct usbhsg_recip_handle *recip_handler = NULL;
 361         int stage = usbhs_status_get_ctrl_stage(irq_state);
 362         int ret = 0;
 363
 364         dev_dbg(dev, "stage = %d\n", stage);
 365
 366         /*
 367          * see Manual
 368          *
 369          *  "Operation"
 370          *  - "Interrupt Function"
 371          *    - "Control Transfer Stage Transition Interrupt"
 372          *      - Fig. "Control Transfer Stage Transitions"
 373          */
 374
 375         switch (stage) {
 376         case READ_DATA_STAGE:
 377                 dcp->handler = &usbhs_fifo_pio_push_handler;
 378                 break;
 379         case WRITE_DATA_STAGE:
 380                 dcp->handler = &usbhs_fifo_pio_pop_handler;
 381                 break;
 382         case NODATA_STATUS_STAGE:
 383                 dcp->handler = &usbhs_ctrl_stage_end_handler;
 384                 break;
 385         default:
 386                 return ret;
 387         }
 388
 389         /*
 390          * get usb request
 391          */
 392         usbhs_usbreq_get_val(priv, &ctrl);
 393
 394         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 395         case USB_TYPE_STANDARD:
 396                 switch (ctrl.bRequest) {
 397                 case USB_REQ_CLEAR_FEATURE:
 398                         recip_handler = &req_clear_feature;
 399                         break;
 400                 }
 401         }
 402
 403         /*
 404          * setup stage / run recip
 405          */
 406         if (recip_handler)
 407                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 408         else
 409                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 410
 411         if (ret < 0)
 412                 usbhs_pipe_stall(pipe);
 413
 414         return ret;
 415 }
 416
 417 /*
 418  *
 419  *              usb_dcp_ops
 420  *
 421  */
 422 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 423 {
 424         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 425         struct usbhs_pkt *pkt;
 426
 427         usbhs_pipe_disable(pipe);
 428
 429         while (1) {
 430                 pkt = usbhs_pkt_pop(pipe, NULL);
 431                 if (!pkt)
 432                         break;
 433         }
 434
 435         return 0;
 436 }
 437
 438 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 439 {
 440         int i;
 441         struct usbhsg_uep *uep;
 442
 443         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 444                 uep->pipe = NULL;
 445 }
 446
 447 /*
 448  *
 449  *              usb_ep_ops
 450  *
 451  */
 452 static int usbhsg_ep_enable(struct usb_ep *ep,
 453                          const struct usb_endpoint_descriptor *desc)
 454 {
 455         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 456         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 457         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 458         struct usbhs_pipe *pipe;
 459         int ret = -EIO;
 460
 461         /*
 462          * if it already have pipe,
 463          * nothing to do
 464          */
 465         if (uep->pipe)
 466                 return 0;
 467
 468         pipe = usbhs_pipe_malloc(priv, desc);
 469         if (pipe) {
 470                 uep->pipe               = pipe;
 471                 pipe->mod_private       = uep;
 472
 473                 if (usb_endpoint_dir_in(desc))
 474                         uep->handler = &usbhs_fifo_pio_push_handler;
 475                 else
 476                         uep->handler = &usbhs_fifo_pio_pop_handler;
 477
 478                 ret = 0;
 479         }
 480
 481         return ret;
 482 }
 483
 484 static int usbhsg_ep_disable(struct usb_ep *ep)
 485 {
 486         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 487
 488         return usbhsg_pipe_disable(uep);
 489 }
 490
 491 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 492                                                    gfp_t gfp_flags)
 493 {
 494         struct usbhsg_request *ureq;
 495
 496         ureq = kzalloc(sizeof *ureq, gfp_flags);
 497         if (!ureq)
 498                 return NULL;
 499
 500         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 501
 502         ureq->req.dma = DMA_ADDR_INVALID;
 503
 504         return &ureq->req;
 505 }
 506
 507 static void usbhsg_ep_free_request(struct usb_ep *ep,
 508                                    struct usb_request *req)
 509 {
 510         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 511
 512         WARN_ON(!list_empty(&ureq->pkt.node));
 513         kfree(ureq);
 514 }
 515
 516 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 517                           gfp_t gfp_flags)
 518 {
 519         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 520         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 521         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 522         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 523
 524         /* param check */
 525         if (usbhsg_is_not_connected(gpriv)      ||
 526             unlikely(!gpriv->driver)            ||
 527             unlikely(!pipe))
 528                 return -ESHUTDOWN;
 529
 530         usbhsg_queue_push(uep, ureq);
 531
 532         return 0;
 533 }
 534
 535 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 536 {
 537         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 538         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 539         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 540
 541         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 542         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 543
 544         return 0;
 545 }
 546
 547 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 548 {
 549         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 550         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 551         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 552         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 553         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 554         unsigned long flags;
 555
 556         usbhsg_pipe_disable(uep);
 557
 558         dev_dbg(dev, "set halt %d (pipe %d)\n",
 559                 halt, usbhs_pipe_number(pipe));
 560
 561         /********************  spin lock ********************/
 562         usbhs_lock(priv, flags);
 563
 564         if (halt)
 565                 usbhs_pipe_stall(pipe);
 566         else
 567                 usbhs_pipe_disable(pipe);
 568
 569         if (halt && wedge)
 570                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 571         else
 572                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 573
 574         usbhs_unlock(priv, flags);
 575         /********************  spin unlock ******************/
 576
 577         return 0;
 578 }
 579
 580 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 581 {
 582         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 583 }
 584
 585 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 586 {
 587         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 588 }
 589
 590 static struct usb_ep_ops usbhsg_ep_ops = {
 591         .enable         = usbhsg_ep_enable,
 592         .disable        = usbhsg_ep_disable,
 593
 594         .alloc_request  = usbhsg_ep_alloc_request,
 595         .free_request   = usbhsg_ep_free_request,
 596
 597         .queue          = usbhsg_ep_queue,
 598         .dequeue        = usbhsg_ep_dequeue,
 599
 600         .set_halt       = usbhsg_ep_set_halt,
 601         .set_wedge      = usbhsg_ep_set_wedge,
 602 };
 603
 604 /*
 605  *              usb module start/end
 606  */
 607 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 608 {
 609         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 610         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 611         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 612         struct device *dev = usbhs_priv_to_dev(priv);
 613         unsigned long flags;
 614         int ret = 0;
 615
 616         /********************  spin lock ********************/
 617         usbhs_lock(priv, flags);
 618
 619         usbhsg_status_set(gpriv, status);
 620         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 621               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 622                 ret = -1; /* not ready */
 623
 624         usbhs_unlock(priv, flags);
 625         /********************  spin unlock ********************/
 626
 627         if (ret < 0)
 628                 return 0; /* not ready is not error */
 629
 630         /*
 631          * enable interrupt and systems if ready
 632          */
 633         dev_dbg(dev, "start gadget\n");
 634
 635         /*
 636          * pipe initialize and enable DCP
 637          */
 638         usbhs_pipe_init(priv,
 639                         usbhsg_queue_done,
 640                         usbhsg_dma_map_ctrl);
 641         usbhs_fifo_init(priv);
 642         usbhsg_uep_init(gpriv);
 643
 644         /* dcp init */
 645         dcp->pipe               = usbhs_dcp_malloc(priv);
 646         dcp->pipe->mod_private  = dcp;
 647
 648         /*
 649          * system config enble
 650          * - HI speed
 651          * - function
 652          * - usb module
 653          */
 654         usbhs_sys_hispeed_ctrl(priv, 1);
 655         usbhs_sys_function_ctrl(priv, 1);
 656         usbhs_sys_usb_ctrl(priv, 1);
 657
 658         /*
 659          * enable irq callback
 660          */
 661         mod->irq_dev_state      = usbhsg_irq_dev_state;
 662         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 663         usbhs_irq_callback_update(priv, mod);
 664
 665         return 0;
 666 }
 667
 668 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 669 {
 670         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 671         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 672         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 673         struct device *dev = usbhs_priv_to_dev(priv);
 674         unsigned long flags;
 675         int ret = 0;
 676
 677         /********************  spin lock ********************/
 678         usbhs_lock(priv, flags);
 679
 680         usbhsg_status_clr(gpriv, status);
 681         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 682             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 683                 ret = -1; /* already done */
 684
 685         usbhs_unlock(priv, flags);
 686         /********************  spin unlock ********************/
 687
 688         if (ret < 0)
 689                 return 0; /* already done is not error */
 690
 691         /*
 692          * disable interrupt and systems if 1st try
 693          */
 694         usbhs_fifo_quit(priv);
 695
 696         /* disable all irq */
 697         mod->irq_dev_state      = NULL;
 698         mod->irq_ctrl_stage     = NULL;
 699         usbhs_irq_callback_update(priv, mod);
 700
 701         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 702
 703         /* disable sys */
 704         usbhs_sys_hispeed_ctrl(priv, 0);
 705         usbhs_sys_function_ctrl(priv, 0);
 706         usbhs_sys_usb_ctrl(priv, 0);
 707
 708         usbhsg_pipe_disable(dcp);
 709
 710         if (gpriv->driver &&
 711             gpriv->driver->disconnect)
 712                 gpriv->driver->disconnect(&gpriv->gadget);
 713
 714         dev_dbg(dev, "stop gadget\n");
 715
 716         return 0;
 717 }
 718
 719 /*
 720  *
 721  *              linux usb function
 722  *
 723  */
 724 struct usbhsg_gpriv *the_controller;
 725 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
 726                             int (*bind)(struct usb_gadget *))
 727 {
 728         struct usbhsg_gpriv *gpriv = the_controller;
 729         struct usbhs_priv *priv;
 730         struct device *dev;
 731         int ret;
 732
 733         if (!bind               ||
 734             !driver             ||
 735             !driver->setup      ||
 736             driver->speed != USB_SPEED_HIGH)
 737                 return -EINVAL;
 738         if (!gpriv)
 739                 return -ENODEV;
 740         if (gpriv->driver)
 741                 return -EBUSY;
 742
 743         dev  = usbhsg_gpriv_to_dev(gpriv);
 744         priv = usbhsg_gpriv_to_priv(gpriv);
 745
 746         /* first hook up the driver ... */
 747         gpriv->driver = driver;
 748         gpriv->gadget.dev.driver = &driver->driver;
 749
 750         ret = device_add(&gpriv->gadget.dev);
 751         if (ret) {
 752                 dev_err(dev, "device_add error %d\n", ret);
 753                 goto add_fail;
 754         }
 755
 756         ret = bind(&gpriv->gadget);
 757         if (ret) {
 758                 dev_err(dev, "bind to driver %s error %d\n",
 759                         driver->driver.name, ret);
 760                 goto bind_fail;
 761         }
 762
 763         dev_dbg(dev, "bind %s\n", driver->driver.name);
 764
 765         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 766
 767 bind_fail:
 768         device_del(&gpriv->gadget.dev);
 769 add_fail:
 770         gpriv->driver = NULL;
 771         gpriv->gadget.dev.driver = NULL;
 772
 773         return ret;
 774 }
 775 EXPORT_SYMBOL(usb_gadget_probe_driver);
 776
 777 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 778 {
 779         struct usbhsg_gpriv *gpriv = the_controller;
 780         struct usbhs_priv *priv;
 781         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 782
 783         if (!gpriv)
 784                 return -ENODEV;
 785
 786         if (!driver             ||
 787             !driver->unbind     ||
 788             driver != gpriv->driver)
 789                 return -EINVAL;
 790
 791         dev  = usbhsg_gpriv_to_dev(gpriv);
 792         priv = usbhsg_gpriv_to_priv(gpriv);
 793
 794         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 795         device_del(&gpriv->gadget.dev);
 796         gpriv->driver = NULL;
 797
 798         if (driver->disconnect)
 799                 driver->disconnect(&gpriv->gadget);
 800
 801         driver->unbind(&gpriv->gadget);
 802         dev_dbg(dev, "unbind %s\n", driver->driver.name);
 803
 804         return 0;
 805 }
 806 EXPORT_SYMBOL(usb_gadget_unregister_driver);
 807
 808 /*
 809  *              usb gadget ops
 810  */
 811 static int usbhsg_get_frame(struct usb_gadget *gadget)
 812 {
 813         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 814         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 815
 816         return usbhs_frame_get_num(priv);
 817 }
 818
 819 static struct usb_gadget_ops usbhsg_gadget_ops = {
 820         .get_frame              = usbhsg_get_frame,
 821 };
 822
 823 static int usbhsg_start(struct usbhs_priv *priv)
 824 {
 825         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
 826 }
 827
 828 static int usbhsg_stop(struct usbhs_priv *priv)
 829 {
 830         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 831 }
 832
 833 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 834 {
 835         struct usbhsg_gpriv *gpriv;
 836         struct usbhsg_uep *uep;
 837         struct device *dev = usbhs_priv_to_dev(priv);
 838         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 839         int i;
 840
 841         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
 842         if (!gpriv) {
 843                 dev_err(dev, "Could not allocate gadget priv\n");
 844                 return -ENOMEM;
 845         }
 846
 847         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
 848         if (!uep) {
 849                 dev_err(dev, "Could not allocate ep\n");
 850                 goto usbhs_mod_gadget_probe_err_gpriv;
 851         }
 852
 853         /*
 854          * CAUTION
 855          *
 856          * There is no guarantee that it is possible to access usb module here.
 857          * Don't accesses to it.
 858          * The accesse will be enable after "usbhsg_start"
 859          */
 860
 861         /*
 862          * register itself
 863          */
 864         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
 865
 866         /* init gpriv */
 867         gpriv->mod.name         = "gadget";
 868         gpriv->mod.start        = usbhsg_start;
 869         gpriv->mod.stop         = usbhsg_stop;
 870         gpriv->uep              = uep;
 871         gpriv->uep_size         = pipe_size;
 872         usbhsg_status_init(gpriv);
 873
 874         /*
 875          * init gadget
 876          */
 877         device_initialize(&gpriv->gadget.dev);
 878         dev_set_name(&gpriv->gadget.dev, "gadget");
 879         gpriv->gadget.dev.parent        = dev;
 880         gpriv->gadget.name              = "renesas_usbhs_udc";
 881         gpriv->gadget.ops               = &usbhsg_gadget_ops;
 882         gpriv->gadget.is_dualspeed      = 1;
 883
 884         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
 885
 886         /*
 887          * init usb_ep
 888          */
 889         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
 890                 uep->gpriv      = gpriv;
 891                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
 892
 893                 uep->ep.name            = uep->ep_name;
 894                 uep->ep.ops             = &usbhsg_ep_ops;
 895                 INIT_LIST_HEAD(&uep->ep.ep_list);
 896
 897                 /* init DCP */
 898                 if (usbhsg_is_dcp(uep)) {
 899                         gpriv->gadget.ep0 = &uep->ep;
 900                         uep->ep.maxpacket = 64;
 901                 }
 902                 /* init normal pipe */
 903                 else {
 904                         uep->ep.maxpacket = 512;
 905                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
 906                 }
 907         }
 908
 909         the_controller = gpriv;
 910
 911         dev_info(dev, "gadget probed\n");
 912
 913         return 0;
 914
 915 usbhs_mod_gadget_probe_err_gpriv:
 916         kfree(gpriv);
 917
 918         return -ENOMEM;
 919 }
 920
 921 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 922 {
 923         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 924
 925         kfree(gpriv->uep);
 926         kfree(gpriv);
 927 }