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 list_head        node;
  30 };
  31
  32 #define EP_NAME_SIZE 8
  33 struct usbhsg_gpriv;
  34 struct usbhsg_pipe_handle;
  35 struct usbhsg_uep {
  36         struct usb_ep            ep;
  37         struct usbhs_pipe       *pipe;
  38         struct list_head         list;
  39
  40         char ep_name[EP_NAME_SIZE];
  41
  42         struct usbhsg_gpriv *gpriv;
  43         struct usbhsg_pipe_handle *handler;
  44 };
  45
  46 struct usbhsg_gpriv {
  47         struct usb_gadget        gadget;
  48         struct usbhs_mod         mod;
  49
  50         struct usbhsg_uep       *uep;
  51         int                      uep_size;
  52
  53         struct usb_gadget_driver        *driver;
  54
  55         u32     status;
  56 #define USBHSG_STATUS_STARTED           (1 << 0)
  57 #define USBHSG_STATUS_REGISTERD         (1 << 1)
  58 #define USBHSG_STATUS_WEDGE             (1 << 2)
  59 };
  60
  61 struct usbhsg_pipe_handle {
  62         int (*prepare)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
  63         int (*try_run)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
  64         void (*irq_mask)(struct usbhsg_uep *uep, int enable);
  65 };
  66
  67 struct usbhsg_recip_handle {
  68         char *name;
  69         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  70                       struct usb_ctrlrequest *ctrl);
  71         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  72                          struct usb_ctrlrequest *ctrl);
  73         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  74                         struct usb_ctrlrequest *ctrl);
  75 };
  76
  77 /*
  78  *              macro
  79  */
  80 #define usbhsg_priv_to_gpriv(priv)                      \
  81         container_of(                                   \
  82                 usbhs_mod_get(priv, USBHS_GADGET),      \
  83                 struct usbhsg_gpriv, mod)
  84
  85 #define __usbhsg_for_each_uep(start, pos, g, i) \
  86         for (i = start, pos = (g)->uep;         \
  87              i < (g)->uep_size;                 \
  88              i++, pos = (g)->uep + i)
  89
  90 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  91         __usbhsg_for_each_uep(1, pos, gpriv, i)
  92
  93 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  94         __usbhsg_for_each_uep(0, pos, gpriv, i)
  95
  96 #define usbhsg_gadget_to_gpriv(g)\
  97         container_of(g, struct usbhsg_gpriv, gadget)
  98
  99 #define usbhsg_req_to_ureq(r)\
 100         container_of(r, struct usbhsg_request, req)
 101
 102 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
 103 #define usbhsg_gpriv_to_lock(gp)        usbhs_priv_to_lock((gp)->mod.priv)
 104 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
 105 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
 106 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
 107 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
 108 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 109 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 110 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 111 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 112
 113 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 114
 115 /* status */
 116 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 117 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 118 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 119 #define usbhsg_status_has(gp, b) (gp->status &   b)
 120
 121 /*
 122  *              list push/pop
 123  */
 124 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 125                               struct usbhsg_request *ureq)
 126 {
 127         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 128         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 129         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 130
 131         /*
 132          *********  assume under spin lock  *********
 133          */
 134         list_del_init(&ureq->node);
 135         list_add_tail(&ureq->node, &uep->list);
 136         ureq->req.actual = 0;
 137         ureq->req.status = -EINPROGRESS;
 138
 139         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 140                 usbhs_pipe_number(pipe),
 141                 ureq->req.length);
 142 }
 143
 144 static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep)
 145 {
 146         /*
 147          *********  assume under spin lock  *********
 148          */
 149         if (list_empty(&uep->list))
 150                 return NULL;
 151
 152         return list_entry(uep->list.next, struct usbhsg_request, node);
 153 }
 154
 155 #define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1);
 156 #define usbhsg_queue_handle(uep)  __usbhsg_queue_handler(uep, 0);
 157 static int __usbhsg_queue_handler(struct usbhsg_uep *uep, int prepare)
 158 {
 159         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 160         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 161         struct usbhsg_request *ureq;
 162         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 163         unsigned long flags;
 164         int is_locked;
 165         int ret = 0;
 166
 167         if (!uep->handler) {
 168                 dev_err(dev, "no handler function\n");
 169                 return -EIO;
 170         }
 171
 172         /*
 173          * CAUTION [*queue handler*]
 174          *
 175          * This function will be called for start/restart queue operation.
 176          * OTOH the most much worry for USB driver is spinlock nest.
 177          * Specially it are
 178          *   - usb_ep_ops  :: queue
 179          *   - usb_request :: complete
 180          *
 181          * But the caller of this function need not care about spinlock.
 182          * This function is using spin_trylock_irqsave for it.
 183          * if "is_locked" is 1, this mean this function lock it.
 184          * but if it is 0, this mean it is already under spin lock.
 185          * see also
 186          *   CAUTION [*endpoint queue*]
 187          *   CAUTION [*request complete*]
 188          */
 189
 190         /******************  spin try lock *******************/
 191         is_locked = spin_trylock_irqsave(lock, flags);
 192         ureq = usbhsg_queue_get(uep);
 193         if (ureq) {
 194                 if (prepare)
 195                         ret = uep->handler->prepare(uep, ureq);
 196                 else
 197                         ret = uep->handler->try_run(uep, ureq);
 198         }
 199         if (is_locked)
 200                 spin_unlock_irqrestore(lock, flags);
 201         /********************  spin unlock ******************/
 202
 203         return ret;
 204 }
 205
 206 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 207                              struct usbhsg_request *ureq,
 208                              int status)
 209 {
 210         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 211         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 212         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 213
 214         /*
 215          *********  assume under spin lock  *********
 216          */
 217
 218         /*
 219          * CAUTION [*request complete*]
 220          *
 221          * There is a possibility not to be called in correct order
 222          * if "complete" is called without spinlock.
 223          *
 224          * So, this function assume it is under spinlock,
 225          * and call usb_request :: complete.
 226          *
 227          * But this "complete" will push next usb_request.
 228          * It mean "usb_ep_ops :: queue" which is using spinlock is called
 229          * under spinlock.
 230          *
 231          * To avoid dead-lock, this driver is using spin_trylock.
 232          *   CAUTION [*endpoint queue*]
 233          *   CAUTION [*queue handler*]
 234          */
 235
 236         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 237
 238         list_del_init(&ureq->node);
 239
 240         ureq->req.status = status;
 241         ureq->req.complete(&uep->ep, &ureq->req);
 242
 243         /* more request ? */
 244         if (0 == status)
 245                 usbhsg_queue_prepare(uep);
 246 }
 247
 248 /*
 249  *              irq enable/disable function
 250  */
 251 #define usbhsg_irq_callback_ctrl(uep, status, enable)                   \
 252         ({                                                              \
 253                 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);  \
 254                 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);      \
 255                 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);  \
 256                 struct usbhs_mod *mod = usbhs_mod_get_current(priv);    \
 257                 if (!mod)                                               \
 258                         return;                                         \
 259                 if (enable)                                             \
 260                         mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \
 261                 else                                                    \
 262                         mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \
 263                 usbhs_irq_callback_update(priv, mod);                   \
 264         })
 265
 266 static void usbhsg_irq_empty_ctrl(struct usbhsg_uep *uep, int enable)
 267 {
 268         usbhsg_irq_callback_ctrl(uep, bempsts, enable);
 269 }
 270
 271 static void usbhsg_irq_ready_ctrl(struct usbhsg_uep *uep, int enable)
 272 {
 273         usbhsg_irq_callback_ctrl(uep, brdysts, enable);
 274 }
 275
 276 /*
 277  *              handler function
 278  */
 279 static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep *uep,
 280                                          struct usbhsg_request *ureq)
 281 {
 282         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 283
 284         /*
 285          *********  assume under spin lock  *********
 286          */
 287
 288         usbhs_dcp_control_transfer_done(pipe);
 289         usbhsg_queue_pop(uep, ureq, 0);
 290
 291         return 0;
 292 }
 293
 294 static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
 295                                       struct usbhsg_request *ureq)
 296 {
 297         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 298         struct usb_request *req = &ureq->req;
 299         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 300         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 301         void *buf;
 302         int remainder, send;
 303         int is_done = 0;
 304         int enable;
 305         int maxp;
 306
 307         /*
 308          *********  assume under spin lock  *********
 309          */
 310
 311         maxp            = usbhs_pipe_get_maxpacket(pipe);
 312         buf             = req->buf    + req->actual;
 313         remainder       = req->length - req->actual;
 314
 315         send = usbhs_fifo_write(pipe, buf, remainder);
 316
 317         /*
 318          * send < 0 : pipe busy
 319          * send = 0 : send zero packet
 320          * send > 0 : send data
 321          *
 322          * send <= max_packet
 323          */
 324         if (send > 0)
 325                 req->actual += send;
 326
 327         /* send all packet ? */
 328         if (send < remainder)
 329                 is_done = 0;            /* there are remainder data */
 330         else if (send < maxp)
 331                 is_done = 1;            /* short packet */
 332         else
 333                 is_done = !req->zero;   /* send zero packet ? */
 334
 335         dev_dbg(dev, "  send %d (%d/ %d/ %d/ %d)\n",
 336                 usbhs_pipe_number(pipe),
 337                 remainder, send, is_done, req->zero);
 338
 339         /*
 340          * enable interrupt and send again in irq handler
 341          * if it still have remainder data which should be sent.
 342          */
 343         enable = !is_done;
 344         uep->handler->irq_mask(uep, enable);
 345
 346         /*
 347          * usbhs_fifo_enable execute
 348          *  - after callback_update,
 349          *  - before queue_pop / stage_end
 350          */
 351         usbhs_fifo_enable(pipe);
 352
 353         /*
 354          * all data were sent ?
 355          */
 356         if (is_done) {
 357                 /* it care below call in
 358                    "function mode" */
 359                 if (usbhsg_is_dcp(uep))
 360                         usbhs_dcp_control_transfer_done(pipe);
 361
 362                 usbhsg_queue_pop(uep, ureq, 0);
 363         }
 364
 365         return 0;
 366 }
 367
 368 static int usbhsg_prepare_send_packet(struct usbhsg_uep *uep,
 369                                       struct usbhsg_request *ureq)
 370 {
 371         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 372
 373         /*
 374          *********  assume under spin lock  *********
 375          */
 376
 377         usbhs_fifo_prepare_write(pipe);
 378         usbhsg_try_run_send_packet(uep, ureq);
 379
 380         return 0;
 381 }
 382
 383 static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
 384                                          struct usbhsg_request *ureq)
 385 {
 386         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 387         struct usb_request *req = &ureq->req;
 388         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 389         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 390         void *buf;
 391         int maxp;
 392         int remainder, recv;
 393         int is_done = 0;
 394
 395         /*
 396          *********  assume under spin lock  *********
 397          */
 398
 399         maxp            = usbhs_pipe_get_maxpacket(pipe);
 400         buf             = req->buf    + req->actual;
 401         remainder       = req->length - req->actual;
 402
 403         recv = usbhs_fifo_read(pipe, buf, remainder);
 404         /*
 405          * recv < 0  : pipe busy
 406          * recv >= 0 : receive data
 407          *
 408          * recv <= max_packet
 409          */
 410         if (recv < 0)
 411                 return -EBUSY;
 412
 413         /* update parameters */
 414         req->actual += recv;
 415
 416         if ((recv == remainder) ||      /* receive all data */
 417             (recv < maxp))              /* short packet */
 418                 is_done = 1;
 419
 420         dev_dbg(dev, "  recv %d (%d/ %d/ %d/ %d)\n",
 421                 usbhs_pipe_number(pipe),
 422                 remainder, recv, is_done, req->zero);
 423
 424         /* read all data ? */
 425         if (is_done) {
 426                 int disable = 0;
 427
 428                 uep->handler->irq_mask(uep, disable);
 429                 usbhs_fifo_disable(pipe);
 430                 usbhsg_queue_pop(uep, ureq, 0);
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int usbhsg_prepare_receive_packet(struct usbhsg_uep *uep,
 437                                          struct usbhsg_request *ureq)
 438 {
 439         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 440         int enable = 1;
 441         int ret;
 442
 443         /*
 444          *********  assume under spin lock  *********
 445          */
 446
 447         ret = usbhs_fifo_prepare_read(pipe);
 448         if (ret < 0)
 449                 return ret;
 450
 451         /*
 452          * data will be read in interrupt handler
 453          */
 454         uep->handler->irq_mask(uep, enable);
 455
 456         return ret;
 457 }
 458
 459 static struct usbhsg_pipe_handle usbhsg_handler_send_by_empty = {
 460         .prepare        = usbhsg_prepare_send_packet,
 461         .try_run        = usbhsg_try_run_send_packet,
 462         .irq_mask       = usbhsg_irq_empty_ctrl,
 463 };
 464
 465 static struct usbhsg_pipe_handle usbhsg_handler_send_by_ready = {
 466         .prepare        = usbhsg_prepare_send_packet,
 467         .try_run        = usbhsg_try_run_send_packet,
 468         .irq_mask       = usbhsg_irq_ready_ctrl,
 469 };
 470
 471 static struct usbhsg_pipe_handle usbhsg_handler_recv_by_ready = {
 472         .prepare        = usbhsg_prepare_receive_packet,
 473         .try_run        = usbhsg_try_run_receive_packet,
 474         .irq_mask       = usbhsg_irq_ready_ctrl,
 475 };
 476
 477 static struct usbhsg_pipe_handle usbhsg_handler_ctrl_stage_end = {
 478         .prepare        = usbhsg_try_run_ctrl_stage_end,
 479         .try_run        = usbhsg_try_run_ctrl_stage_end,
 480 };
 481
 482 /*
 483  * DCP pipe can NOT use "ready interrupt" for "send"
 484  * it should use "empty" interrupt.
 485  * see
 486  *   "Operation" - "Interrupt Function" - "BRDY Interrupt"
 487  *
 488  * on the other hand, normal pipe can use "ready interrupt" for "send"
 489  * even though it is single/double buffer
 490  */
 491 #define usbhsg_handler_send_ctrl        usbhsg_handler_send_by_empty
 492 #define usbhsg_handler_recv_ctrl        usbhsg_handler_recv_by_ready
 493
 494 #define usbhsg_handler_send_packet      usbhsg_handler_send_by_ready
 495 #define usbhsg_handler_recv_packet      usbhsg_handler_recv_by_ready
 496
 497 /*
 498  *              USB_TYPE_STANDARD / clear feature functions
 499  */
 500 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 501                                                  struct usbhsg_uep *uep,
 502                                                  struct usb_ctrlrequest *ctrl)
 503 {
 504         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 505         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 506         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 507
 508         usbhs_dcp_control_transfer_done(pipe);
 509
 510         return 0;
 511 }
 512
 513 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 514                                                    struct usbhsg_uep *uep,
 515                                                    struct usb_ctrlrequest *ctrl)
 516 {
 517         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 518         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 519
 520         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 521                 usbhs_fifo_disable(pipe);
 522                 usbhs_pipe_clear_sequence(pipe);
 523                 usbhs_fifo_enable(pipe);
 524         }
 525
 526         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 527
 528         usbhsg_queue_prepare(uep);
 529
 530         return 0;
 531 }
 532
 533 struct usbhsg_recip_handle req_clear_feature = {
 534         .name           = "clear feature",
 535         .device         = usbhsg_recip_handler_std_control_done,
 536         .interface      = usbhsg_recip_handler_std_control_done,
 537         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 538 };
 539
 540 /*
 541  *              USB_TYPE handler
 542  */
 543 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 544                                    struct usbhsg_recip_handle *handler,
 545                                    struct usb_ctrlrequest *ctrl)
 546 {
 547         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 548         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 549         struct usbhsg_uep *uep;
 550         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 551         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 552         int ret;
 553         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 554                     struct usb_ctrlrequest *ctrl);
 555         char *msg;
 556
 557         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 558
 559         switch (recip) {
 560         case USB_RECIP_DEVICE:
 561                 msg     = "DEVICE";
 562                 func    = handler->device;
 563                 break;
 564         case USB_RECIP_INTERFACE:
 565                 msg     = "INTERFACE";
 566                 func    = handler->interface;
 567                 break;
 568         case USB_RECIP_ENDPOINT:
 569                 msg     = "ENDPOINT";
 570                 func    = handler->endpoint;
 571                 break;
 572         default:
 573                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 574                 func = NULL;
 575                 ret = -EINVAL;
 576         }
 577
 578         if (func) {
 579                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 580                 ret = func(priv, uep, ctrl);
 581         }
 582
 583         return ret;
 584 }
 585
 586 /*
 587  *              irq functions
 588  *
 589  * it will be called from usbhs_interrupt
 590  */
 591 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 592                                 struct usbhs_irq_state *irq_state)
 593 {
 594         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 595         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 596
 597         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
 598
 599         dev_dbg(dev, "state = %x : speed : %d\n",
 600                 usbhs_status_get_device_state(irq_state),
 601                 gpriv->gadget.speed);
 602
 603         return 0;
 604 }
 605
 606 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 607                                  struct usbhs_irq_state *irq_state)
 608 {
 609         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 610         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 611         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 612         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 613         struct usb_ctrlrequest ctrl;
 614         struct usbhsg_recip_handle *recip_handler = NULL;
 615         int stage = usbhs_status_get_ctrl_stage(irq_state);
 616         int ret = 0;
 617
 618         dev_dbg(dev, "stage = %d\n", stage);
 619
 620         /*
 621          * see Manual
 622          *
 623          *  "Operation"
 624          *  - "Interrupt Function"
 625          *    - "Control Transfer Stage Transition Interrupt"
 626          *      - Fig. "Control Transfer Stage Transitions"
 627          */
 628
 629         switch (stage) {
 630         case READ_DATA_STAGE:
 631                 dcp->handler = &usbhsg_handler_send_ctrl;
 632                 break;
 633         case WRITE_DATA_STAGE:
 634                 dcp->handler = &usbhsg_handler_recv_ctrl;
 635                 break;
 636         case NODATA_STATUS_STAGE:
 637                 dcp->handler = &usbhsg_handler_ctrl_stage_end;
 638                 break;
 639         default:
 640                 return ret;
 641         }
 642
 643         /*
 644          * get usb request
 645          */
 646         usbhs_usbreq_get_val(priv, &ctrl);
 647
 648         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 649         case USB_TYPE_STANDARD:
 650                 switch (ctrl.bRequest) {
 651                 case USB_REQ_CLEAR_FEATURE:
 652                         recip_handler = &req_clear_feature;
 653                         break;
 654                 }
 655         }
 656
 657         /*
 658          * setup stage / run recip
 659          */
 660         if (recip_handler)
 661                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 662         else
 663                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 664
 665         if (ret < 0)
 666                 usbhs_fifo_stall(pipe);
 667
 668         return ret;
 669 }
 670
 671 static int usbhsg_irq_empty(struct usbhs_priv *priv,
 672                             struct usbhs_irq_state *irq_state)
 673 {
 674         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 675         struct usbhsg_uep *uep;
 676         struct usbhs_pipe *pipe;
 677         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 678         int i, ret;
 679
 680         if (!irq_state->bempsts) {
 681                 dev_err(dev, "debug %s !!\n", __func__);
 682                 return -EIO;
 683         }
 684
 685         dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
 686
 687         /*
 688          * search interrupted "pipe"
 689          * not "uep".
 690          */
 691         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 692                 if (!(irq_state->bempsts & (1 << i)))
 693                         continue;
 694
 695                 uep     = usbhsg_pipe_to_uep(pipe);
 696                 ret     = usbhsg_queue_handle(uep);
 697                 if (ret < 0)
 698                         dev_err(dev, "send error %d : %d\n", i, ret);
 699         }
 700
 701         return 0;
 702 }
 703
 704 static int usbhsg_irq_ready(struct usbhs_priv *priv,
 705                             struct usbhs_irq_state *irq_state)
 706 {
 707         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 708         struct usbhsg_uep *uep;
 709         struct usbhs_pipe *pipe;
 710         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 711         int i, ret;
 712
 713         if (!irq_state->brdysts) {
 714                 dev_err(dev, "debug %s !!\n", __func__);
 715                 return -EIO;
 716         }
 717
 718         dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
 719
 720         /*
 721          * search interrupted "pipe"
 722          * not "uep".
 723          */
 724         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 725                 if (!(irq_state->brdysts & (1 << i)))
 726                         continue;
 727
 728                 uep     = usbhsg_pipe_to_uep(pipe);
 729                 ret     = usbhsg_queue_handle(uep);
 730                 if (ret < 0)
 731                         dev_err(dev, "receive error %d : %d\n", i, ret);
 732         }
 733
 734         return 0;
 735 }
 736
 737 /*
 738  *
 739  *              usb_dcp_ops
 740  *
 741  */
 742 static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
 743 {
 744         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 745         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 746         struct usbhs_pipe *pipe;
 747
 748         /*
 749          *********  assume under spin lock  *********
 750          */
 751
 752         pipe = usbhs_dcp_malloc(priv);
 753         if (!pipe)
 754                 return -EIO;
 755
 756         uep->pipe               = pipe;
 757         uep->pipe->mod_private  = uep;
 758         INIT_LIST_HEAD(&uep->list);
 759
 760         return 0;
 761 }
 762
 763 #define usbhsg_dcp_disable usbhsg_pipe_disable
 764 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 765 {
 766         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 767         struct usbhsg_request *ureq;
 768         int disable = 0;
 769
 770         /*
 771          *********  assume under spin lock  *********
 772          */
 773
 774         usbhs_fifo_disable(pipe);
 775
 776         /*
 777          * disable pipe irq
 778          */
 779         usbhsg_irq_empty_ctrl(uep, disable);
 780         usbhsg_irq_ready_ctrl(uep, disable);
 781
 782         while (1) {
 783                 ureq = usbhsg_queue_get(uep);
 784                 if (!ureq)
 785                         break;
 786
 787                 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 788         }
 789
 790         uep->pipe->mod_private  = NULL;
 791         uep->pipe               = NULL;
 792
 793         return 0;
 794 }
 795
 796 /*
 797  *
 798  *              usb_ep_ops
 799  *
 800  */
 801 static int usbhsg_ep_enable(struct usb_ep *ep,
 802                          const struct usb_endpoint_descriptor *desc)
 803 {
 804         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 805         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 806         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 807         struct usbhs_pipe *pipe;
 808         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 809         unsigned long flags;
 810         int ret = -EIO;
 811
 812         /********************  spin lock ********************/
 813         spin_lock_irqsave(lock, flags);
 814
 815         pipe = usbhs_pipe_malloc(priv, desc);
 816         if (pipe) {
 817                 uep->pipe               = pipe;
 818                 pipe->mod_private       = uep;
 819                 INIT_LIST_HEAD(&uep->list);
 820
 821                 if (usb_endpoint_dir_in(desc))
 822                         uep->handler = &usbhsg_handler_send_packet;
 823                 else
 824                         uep->handler = &usbhsg_handler_recv_packet;
 825
 826                 ret = 0;
 827         }
 828         spin_unlock_irqrestore(lock, flags);
 829         /********************  spin unlock ******************/
 830
 831         return ret;
 832 }
 833
 834 static int usbhsg_ep_disable(struct usb_ep *ep)
 835 {
 836         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 837         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 838         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 839         unsigned long flags;
 840         int ret;
 841
 842         /********************  spin lock ********************/
 843         spin_lock_irqsave(lock, flags);
 844         ret = usbhsg_pipe_disable(uep);
 845         spin_unlock_irqrestore(lock, flags);
 846         /********************  spin unlock ******************/
 847
 848         return ret;
 849 }
 850
 851 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 852                                                    gfp_t gfp_flags)
 853 {
 854         struct usbhsg_request *ureq;
 855
 856         ureq = kzalloc(sizeof *ureq, gfp_flags);
 857         if (!ureq)
 858                 return NULL;
 859
 860         INIT_LIST_HEAD(&ureq->node);
 861         return &ureq->req;
 862 }
 863
 864 static void usbhsg_ep_free_request(struct usb_ep *ep,
 865                                    struct usb_request *req)
 866 {
 867         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 868
 869         WARN_ON(!list_empty(&ureq->node));
 870         kfree(ureq);
 871 }
 872
 873 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 874                           gfp_t gfp_flags)
 875 {
 876         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 877         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 878         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 879         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 880         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 881         unsigned long flags;
 882         int ret = 0;
 883         int is_locked;
 884
 885         /*
 886          * CAUTION [*endpoint queue*]
 887          *
 888          * This function will be called from usb_request :: complete
 889          * or usb driver timing.
 890          * If this function is called from usb_request :: complete,
 891          * it is already under spinlock on this driver.
 892          * but it is called frm usb driver, this function should call spinlock.
 893          *
 894          * This function is using spin_trylock_irqsave to solve this issue.
 895          * if "is_locked" is 1, this mean this function lock it.
 896          * but if it is 0, this mean it is already under spin lock.
 897          * see also
 898          *   CAUTION [*queue handler*]
 899          *   CAUTION [*request complete*]
 900          */
 901
 902         /********************  spin lock ********************/
 903         is_locked = spin_trylock_irqsave(lock, flags);
 904
 905         /* param check */
 906         if (usbhsg_is_not_connected(gpriv)      ||
 907             unlikely(!gpriv->driver)            ||
 908             unlikely(!pipe))
 909                 ret = -ESHUTDOWN;
 910         else
 911                 usbhsg_queue_push(uep, ureq);
 912
 913         if (is_locked)
 914                 spin_unlock_irqrestore(lock, flags);
 915         /********************  spin unlock ******************/
 916
 917         usbhsg_queue_prepare(uep);
 918
 919         return ret;
 920 }
 921
 922 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 923 {
 924         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 925         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 926         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 927         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 928         unsigned long flags;
 929         int is_locked;
 930
 931         /*
 932          * see
 933          *   CAUTION [*queue handler*]
 934          *   CAUTION [*endpoint queue*]
 935          *   CAUTION [*request complete*]
 936          */
 937
 938         /********************  spin lock ********************/
 939         is_locked = spin_trylock_irqsave(lock, flags);
 940
 941         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 942
 943         if (is_locked)
 944                 spin_unlock_irqrestore(lock, flags);
 945         /********************  spin unlock ******************/
 946
 947         return 0;
 948 }
 949
 950 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 951 {
 952         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 953         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 954         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 955         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 956         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 957         unsigned long flags;
 958         int ret = -EAGAIN;
 959         int is_locked;
 960
 961         /*
 962          * see
 963          *   CAUTION [*queue handler*]
 964          *   CAUTION [*endpoint queue*]
 965          *   CAUTION [*request complete*]
 966          */
 967
 968         /********************  spin lock ********************/
 969         is_locked = spin_trylock_irqsave(lock, flags);
 970         if (!usbhsg_queue_get(uep)) {
 971
 972                 dev_dbg(dev, "set halt %d (pipe %d)\n",
 973                         halt, usbhs_pipe_number(pipe));
 974
 975                 if (halt)
 976                         usbhs_fifo_stall(pipe);
 977                 else
 978                         usbhs_fifo_disable(pipe);
 979
 980                 if (halt && wedge)
 981                         usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 982                 else
 983                         usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 984
 985                 ret = 0;
 986         }
 987
 988         if (is_locked)
 989                 spin_unlock_irqrestore(lock, flags);
 990         /********************  spin unlock ******************/
 991
 992         return ret;
 993 }
 994
 995 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 996 {
 997         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 998 }
 999
1000 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
1001 {
1002         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
1003 }
1004
1005 static struct usb_ep_ops usbhsg_ep_ops = {
1006         .enable         = usbhsg_ep_enable,
1007         .disable        = usbhsg_ep_disable,
1008
1009         .alloc_request  = usbhsg_ep_alloc_request,
1010         .free_request   = usbhsg_ep_free_request,
1011
1012         .queue          = usbhsg_ep_queue,
1013         .dequeue        = usbhsg_ep_dequeue,
1014
1015         .set_halt       = usbhsg_ep_set_halt,
1016         .set_wedge      = usbhsg_ep_set_wedge,
1017 };
1018
1019 /*
1020  *              usb module start/end
1021  */
1022 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
1023 {
1024         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1025         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1026         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1027         struct device *dev = usbhs_priv_to_dev(priv);
1028         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
1029         unsigned long flags;
1030
1031         /********************  spin lock ********************/
1032         spin_lock_irqsave(lock, flags);
1033
1034         /*
1035          * enable interrupt and systems if ready
1036          */
1037         usbhsg_status_set(gpriv, status);
1038         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1039               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
1040                 goto usbhsg_try_start_unlock;
1041
1042         dev_dbg(dev, "start gadget\n");
1043
1044         /*
1045          * pipe initialize and enable DCP
1046          */
1047         usbhs_pipe_init(priv);
1048         usbhsg_dcp_enable(dcp);
1049
1050         /*
1051          * system config enble
1052          * - HI speed
1053          * - function
1054          * - usb module
1055          */
1056         usbhs_sys_hispeed_ctrl(priv, 1);
1057         usbhs_sys_function_ctrl(priv, 1);
1058         usbhs_sys_usb_ctrl(priv, 1);
1059
1060         /*
1061          * enable irq callback
1062          */
1063         mod->irq_dev_state      = usbhsg_irq_dev_state;
1064         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
1065         mod->irq_empty          = usbhsg_irq_empty;
1066         mod->irq_ready          = usbhsg_irq_ready;
1067         mod->irq_bempsts        = 0;
1068         mod->irq_brdysts        = 0;
1069         usbhs_irq_callback_update(priv, mod);
1070
1071 usbhsg_try_start_unlock:
1072         spin_unlock_irqrestore(lock, flags);
1073         /********************  spin unlock ********************/
1074
1075         return 0;
1076 }
1077
1078 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
1079 {
1080         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1081         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1082         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1083         struct device *dev = usbhs_priv_to_dev(priv);
1084         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
1085         unsigned long flags;
1086
1087         /********************  spin lock ********************/
1088         spin_lock_irqsave(lock, flags);
1089
1090         /*
1091          * disable interrupt and systems if 1st try
1092          */
1093         usbhsg_status_clr(gpriv, status);
1094         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1095             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
1096                 goto usbhsg_try_stop_unlock;
1097
1098         /* disable all irq */
1099         mod->irq_dev_state      = NULL;
1100         mod->irq_ctrl_stage     = NULL;
1101         mod->irq_empty          = NULL;
1102         mod->irq_ready          = NULL;
1103         mod->irq_bempsts        = 0;
1104         mod->irq_brdysts        = 0;
1105         usbhs_irq_callback_update(priv, mod);
1106
1107         usbhsg_dcp_disable(dcp);
1108
1109         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
1110
1111         /* disable sys */
1112         usbhs_sys_hispeed_ctrl(priv, 0);
1113         usbhs_sys_function_ctrl(priv, 0);
1114         usbhs_sys_usb_ctrl(priv, 0);
1115
1116         spin_unlock_irqrestore(lock, flags);
1117         /********************  spin unlock ********************/
1118
1119         if (gpriv->driver &&
1120             gpriv->driver->disconnect)
1121                 gpriv->driver->disconnect(&gpriv->gadget);
1122
1123         dev_dbg(dev, "stop gadget\n");
1124
1125         return 0;
1126
1127 usbhsg_try_stop_unlock:
1128         spin_unlock_irqrestore(lock, flags);
1129
1130         return 0;
1131 }
1132
1133 /*
1134  *
1135  *              linux usb function
1136  *
1137  */
1138 struct usbhsg_gpriv *the_controller;
1139 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1140                             int (*bind)(struct usb_gadget *))
1141 {
1142         struct usbhsg_gpriv *gpriv = the_controller;
1143         struct usbhs_priv *priv;
1144         struct device *dev;
1145         int ret;
1146
1147         if (!bind               ||
1148             !driver             ||
1149             !driver->setup      ||
1150             driver->speed != USB_SPEED_HIGH)
1151                 return -EINVAL;
1152         if (!gpriv)
1153                 return -ENODEV;
1154         if (gpriv->driver)
1155                 return -EBUSY;
1156
1157         dev  = usbhsg_gpriv_to_dev(gpriv);
1158         priv = usbhsg_gpriv_to_priv(gpriv);
1159
1160         /* first hook up the driver ... */
1161         gpriv->driver = driver;
1162         gpriv->gadget.dev.driver = &driver->driver;
1163
1164         ret = device_add(&gpriv->gadget.dev);
1165         if (ret) {
1166                 dev_err(dev, "device_add error %d\n", ret);
1167                 goto add_fail;
1168         }
1169
1170         ret = bind(&gpriv->gadget);
1171         if (ret) {
1172                 dev_err(dev, "bind to driver %s error %d\n",
1173                         driver->driver.name, ret);
1174                 goto bind_fail;
1175         }
1176
1177         dev_dbg(dev, "bind %s\n", driver->driver.name);
1178
1179         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
1180
1181 bind_fail:
1182         device_del(&gpriv->gadget.dev);
1183 add_fail:
1184         gpriv->driver = NULL;
1185         gpriv->gadget.dev.driver = NULL;
1186
1187         return ret;
1188 }
1189 EXPORT_SYMBOL(usb_gadget_probe_driver);
1190
1191 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1192 {
1193         struct usbhsg_gpriv *gpriv = the_controller;
1194         struct usbhs_priv *priv;
1195         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1196
1197         if (!gpriv)
1198                 return -ENODEV;
1199
1200         if (!driver             ||
1201             !driver->unbind     ||
1202             driver != gpriv->driver)
1203                 return -EINVAL;
1204
1205         dev  = usbhsg_gpriv_to_dev(gpriv);
1206         priv = usbhsg_gpriv_to_priv(gpriv);
1207
1208         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
1209         device_del(&gpriv->gadget.dev);
1210         gpriv->driver = NULL;
1211
1212         if (driver->disconnect)
1213                 driver->disconnect(&gpriv->gadget);
1214
1215         driver->unbind(&gpriv->gadget);
1216         dev_dbg(dev, "unbind %s\n", driver->driver.name);
1217
1218         return 0;
1219 }
1220 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1221
1222 /*
1223  *              usb gadget ops
1224  */
1225 static int usbhsg_get_frame(struct usb_gadget *gadget)
1226 {
1227         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1228         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1229
1230         return usbhs_frame_get_num(priv);
1231 }
1232
1233 static struct usb_gadget_ops usbhsg_gadget_ops = {
1234         .get_frame              = usbhsg_get_frame,
1235 };
1236
1237 static int usbhsg_start(struct usbhs_priv *priv)
1238 {
1239         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1240 }
1241
1242 static int usbhsg_stop(struct usbhs_priv *priv)
1243 {
1244         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1245 }
1246
1247 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1248 {
1249         struct usbhsg_gpriv *gpriv;
1250         struct usbhsg_uep *uep;
1251         struct device *dev = usbhs_priv_to_dev(priv);
1252         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1253         int i;
1254
1255         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1256         if (!gpriv) {
1257                 dev_err(dev, "Could not allocate gadget priv\n");
1258                 return -ENOMEM;
1259         }
1260
1261         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1262         if (!uep) {
1263                 dev_err(dev, "Could not allocate ep\n");
1264                 goto usbhs_mod_gadget_probe_err_gpriv;
1265         }
1266
1267         /*
1268          * CAUTION
1269          *
1270          * There is no guarantee that it is possible to access usb module here.
1271          * Don't accesses to it.
1272          * The accesse will be enable after "usbhsg_start"
1273          */
1274
1275         /*
1276          * register itself
1277          */
1278         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1279
1280         /* init gpriv */
1281         gpriv->mod.name         = "gadget";
1282         gpriv->mod.start        = usbhsg_start;
1283         gpriv->mod.stop         = usbhsg_stop;
1284         gpriv->uep              = uep;
1285         gpriv->uep_size         = pipe_size;
1286         usbhsg_status_init(gpriv);
1287
1288         /*
1289          * init gadget
1290          */
1291         device_initialize(&gpriv->gadget.dev);
1292         dev_set_name(&gpriv->gadget.dev, "gadget");
1293         gpriv->gadget.dev.parent        = dev;
1294         gpriv->gadget.name              = "renesas_usbhs_udc";
1295         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1296         gpriv->gadget.is_dualspeed      = 1;
1297
1298         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1299
1300         /*
1301          * init usb_ep
1302          */
1303         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1304                 uep->gpriv      = gpriv;
1305                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1306
1307                 uep->ep.name            = uep->ep_name;
1308                 uep->ep.ops             = &usbhsg_ep_ops;
1309                 INIT_LIST_HEAD(&uep->ep.ep_list);
1310                 INIT_LIST_HEAD(&uep->list);
1311
1312                 /* init DCP */
1313                 if (usbhsg_is_dcp(uep)) {
1314                         gpriv->gadget.ep0 = &uep->ep;
1315                         uep->ep.maxpacket = 64;
1316                 }
1317                 /* init normal pipe */
1318                 else {
1319                         uep->ep.maxpacket = 512;
1320                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1321                 }
1322         }
1323
1324         the_controller = gpriv;
1325
1326         dev_info(dev, "gadget probed\n");
1327
1328         return 0;
1329
1330 usbhs_mod_gadget_probe_err_gpriv:
1331         kfree(gpriv);
1332
1333         return -ENOMEM;
1334 }
1335
1336 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1337 {
1338         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1339
1340         kfree(gpriv);
1341 }