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  *              usbhsg_trylock
 123  *
 124  * This driver don't use spin_try_lock
 125  * to avoid warning of CONFIG_DEBUG_SPINLOCK
 126  */
 127 static spinlock_t *usbhsg_trylock(struct usbhsg_gpriv *gpriv,
 128                                   unsigned long *flags)
 129 {
 130         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 131
 132         /* check spin lock status
 133          * to avoid deadlock/nest */
 134         if (spin_is_locked(lock))
 135                 return NULL;
 136
 137         spin_lock_irqsave(lock, *flags);
 138
 139         return lock;
 140 }
 141
 142 static void usbhsg_unlock(spinlock_t *lock, unsigned long *flags)
 143 {
 144         if (!lock)
 145                 return;
 146
 147         spin_unlock_irqrestore(lock, *flags);
 148 }
 149
 150 /*
 151  *              list push/pop
 152  */
 153 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 154                               struct usbhsg_request *ureq)
 155 {
 156         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 157         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 158         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 159
 160         /*
 161          *********  assume under spin lock  *********
 162          */
 163         list_del_init(&ureq->node);
 164         list_add_tail(&ureq->node, &uep->list);
 165         ureq->req.actual = 0;
 166         ureq->req.status = -EINPROGRESS;
 167
 168         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 169                 usbhs_pipe_number(pipe),
 170                 ureq->req.length);
 171 }
 172
 173 static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep)
 174 {
 175         /*
 176          *********  assume under spin lock  *********
 177          */
 178         if (list_empty(&uep->list))
 179                 return NULL;
 180
 181         return list_entry(uep->list.next, struct usbhsg_request, node);
 182 }
 183
 184 #define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1);
 185 #define usbhsg_queue_handle(uep)  __usbhsg_queue_handler(uep, 0);
 186 static int __usbhsg_queue_handler(struct usbhsg_uep *uep, int prepare)
 187 {
 188         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 189         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 190         struct usbhsg_request *ureq;
 191         spinlock_t *lock;
 192         unsigned long flags;
 193         int ret = 0;
 194
 195         if (!uep->handler) {
 196                 dev_err(dev, "no handler function\n");
 197                 return -EIO;
 198         }
 199
 200         /*
 201          * CAUTION [*queue handler*]
 202          *
 203          * This function will be called for start/restart queue operation.
 204          * OTOH the most much worry for USB driver is spinlock nest.
 205          * Specially it are
 206          *   - usb_ep_ops  :: queue
 207          *   - usb_request :: complete
 208          *
 209          * But the caller of this function need not care about spinlock.
 210          * This function is using usbhsg_trylock for it.
 211          * if "is_locked" is 1, this mean this function lock it.
 212          * but if it is 0, this mean it is already under spin lock.
 213          * see also
 214          *   CAUTION [*endpoint queue*]
 215          *   CAUTION [*request complete*]
 216          */
 217
 218         /******************  spin try lock *******************/
 219         lock = usbhsg_trylock(gpriv, &flags);
 220
 221         ureq = usbhsg_queue_get(uep);
 222         if (ureq) {
 223                 if (prepare)
 224                         ret = uep->handler->prepare(uep, ureq);
 225                 else
 226                         ret = uep->handler->try_run(uep, ureq);
 227         }
 228         usbhsg_unlock(lock, &flags);
 229         /********************  spin unlock ******************/
 230
 231         return ret;
 232 }
 233
 234 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 235                              struct usbhsg_request *ureq,
 236                              int status)
 237 {
 238         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 239         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 240         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 241
 242         /*
 243          *********  assume under spin lock  *********
 244          */
 245
 246         /*
 247          * CAUTION [*request complete*]
 248          *
 249          * There is a possibility not to be called in correct order
 250          * if "complete" is called without spinlock.
 251          *
 252          * So, this function assume it is under spinlock,
 253          * and call usb_request :: complete.
 254          *
 255          * But this "complete" will push next usb_request.
 256          * It mean "usb_ep_ops :: queue" which is using spinlock is called
 257          * under spinlock.
 258          *
 259          * To avoid dead-lock, this driver is using usbhsg_trylock.
 260          *   CAUTION [*endpoint queue*]
 261          *   CAUTION [*queue handler*]
 262          */
 263
 264         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 265
 266         list_del_init(&ureq->node);
 267
 268         ureq->req.status = status;
 269         ureq->req.complete(&uep->ep, &ureq->req);
 270
 271         /* more request ? */
 272         if (0 == status)
 273                 usbhsg_queue_prepare(uep);
 274 }
 275
 276 /*
 277  *              irq enable/disable function
 278  */
 279 #define usbhsg_irq_callback_ctrl(uep, status, enable)                   \
 280         ({                                                              \
 281                 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);  \
 282                 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);      \
 283                 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);  \
 284                 struct usbhs_mod *mod = usbhs_mod_get_current(priv);    \
 285                 if (!mod)                                               \
 286                         return;                                         \
 287                 if (enable)                                             \
 288                         mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \
 289                 else                                                    \
 290                         mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \
 291                 usbhs_irq_callback_update(priv, mod);                   \
 292         })
 293
 294 static void usbhsg_irq_empty_ctrl(struct usbhsg_uep *uep, int enable)
 295 {
 296         usbhsg_irq_callback_ctrl(uep, bempsts, enable);
 297 }
 298
 299 static void usbhsg_irq_ready_ctrl(struct usbhsg_uep *uep, int enable)
 300 {
 301         usbhsg_irq_callback_ctrl(uep, brdysts, enable);
 302 }
 303
 304 /*
 305  *              handler function
 306  */
 307 static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep *uep,
 308                                          struct usbhsg_request *ureq)
 309 {
 310         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 311
 312         /*
 313          *********  assume under spin lock  *********
 314          */
 315
 316         usbhs_dcp_control_transfer_done(pipe);
 317         usbhsg_queue_pop(uep, ureq, 0);
 318
 319         return 0;
 320 }
 321
 322 static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
 323                                       struct usbhsg_request *ureq)
 324 {
 325         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 326         struct usb_request *req = &ureq->req;
 327         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 328         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 329         void *buf;
 330         int remainder, send;
 331         int is_done = 0;
 332         int enable;
 333         int maxp;
 334
 335         /*
 336          *********  assume under spin lock  *********
 337          */
 338
 339         maxp            = usbhs_pipe_get_maxpacket(pipe);
 340         buf             = req->buf    + req->actual;
 341         remainder       = req->length - req->actual;
 342
 343         send = usbhs_fifo_write(pipe, buf, remainder);
 344
 345         /*
 346          * send < 0 : pipe busy
 347          * send = 0 : send zero packet
 348          * send > 0 : send data
 349          *
 350          * send <= max_packet
 351          */
 352         if (send > 0)
 353                 req->actual += send;
 354
 355         /* send all packet ? */
 356         if (send < remainder)
 357                 is_done = 0;            /* there are remainder data */
 358         else if (send < maxp)
 359                 is_done = 1;            /* short packet */
 360         else
 361                 is_done = !req->zero;   /* send zero packet ? */
 362
 363         dev_dbg(dev, "  send %d (%d/ %d/ %d/ %d)\n",
 364                 usbhs_pipe_number(pipe),
 365                 remainder, send, is_done, req->zero);
 366
 367         /*
 368          * enable interrupt and send again in irq handler
 369          * if it still have remainder data which should be sent.
 370          */
 371         enable = !is_done;
 372         uep->handler->irq_mask(uep, enable);
 373
 374         /*
 375          * usbhs_fifo_enable execute
 376          *  - after callback_update,
 377          *  - before queue_pop / stage_end
 378          */
 379         usbhs_fifo_enable(pipe);
 380
 381         /*
 382          * all data were sent ?
 383          */
 384         if (is_done) {
 385                 /* it care below call in
 386                    "function mode" */
 387                 if (usbhsg_is_dcp(uep))
 388                         usbhs_dcp_control_transfer_done(pipe);
 389
 390                 usbhsg_queue_pop(uep, ureq, 0);
 391         }
 392
 393         return 0;
 394 }
 395
 396 static int usbhsg_prepare_send_packet(struct usbhsg_uep *uep,
 397                                       struct usbhsg_request *ureq)
 398 {
 399         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 400
 401         /*
 402          *********  assume under spin lock  *********
 403          */
 404
 405         usbhs_fifo_prepare_write(pipe);
 406         usbhsg_try_run_send_packet(uep, ureq);
 407
 408         return 0;
 409 }
 410
 411 static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
 412                                          struct usbhsg_request *ureq)
 413 {
 414         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 415         struct usb_request *req = &ureq->req;
 416         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 417         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 418         void *buf;
 419         int maxp;
 420         int remainder, recv;
 421         int is_done = 0;
 422
 423         /*
 424          *********  assume under spin lock  *********
 425          */
 426
 427         maxp            = usbhs_pipe_get_maxpacket(pipe);
 428         buf             = req->buf    + req->actual;
 429         remainder       = req->length - req->actual;
 430
 431         recv = usbhs_fifo_read(pipe, buf, remainder);
 432         /*
 433          * recv < 0  : pipe busy
 434          * recv >= 0 : receive data
 435          *
 436          * recv <= max_packet
 437          */
 438         if (recv < 0)
 439                 return -EBUSY;
 440
 441         /* update parameters */
 442         req->actual += recv;
 443
 444         if ((recv == remainder) ||      /* receive all data */
 445             (recv < maxp))              /* short packet */
 446                 is_done = 1;
 447
 448         dev_dbg(dev, "  recv %d (%d/ %d/ %d/ %d)\n",
 449                 usbhs_pipe_number(pipe),
 450                 remainder, recv, is_done, req->zero);
 451
 452         /* read all data ? */
 453         if (is_done) {
 454                 int disable = 0;
 455
 456                 uep->handler->irq_mask(uep, disable);
 457                 usbhs_fifo_disable(pipe);
 458                 usbhsg_queue_pop(uep, ureq, 0);
 459         }
 460
 461         return 0;
 462 }
 463
 464 static int usbhsg_prepare_receive_packet(struct usbhsg_uep *uep,
 465                                          struct usbhsg_request *ureq)
 466 {
 467         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 468         int enable = 1;
 469         int ret;
 470
 471         /*
 472          *********  assume under spin lock  *********
 473          */
 474
 475         ret = usbhs_fifo_prepare_read(pipe);
 476         if (ret < 0)
 477                 return ret;
 478
 479         /*
 480          * data will be read in interrupt handler
 481          */
 482         uep->handler->irq_mask(uep, enable);
 483
 484         return ret;
 485 }
 486
 487 static struct usbhsg_pipe_handle usbhsg_handler_send_by_empty = {
 488         .prepare        = usbhsg_prepare_send_packet,
 489         .try_run        = usbhsg_try_run_send_packet,
 490         .irq_mask       = usbhsg_irq_empty_ctrl,
 491 };
 492
 493 static struct usbhsg_pipe_handle usbhsg_handler_send_by_ready = {
 494         .prepare        = usbhsg_prepare_send_packet,
 495         .try_run        = usbhsg_try_run_send_packet,
 496         .irq_mask       = usbhsg_irq_ready_ctrl,
 497 };
 498
 499 static struct usbhsg_pipe_handle usbhsg_handler_recv_by_ready = {
 500         .prepare        = usbhsg_prepare_receive_packet,
 501         .try_run        = usbhsg_try_run_receive_packet,
 502         .irq_mask       = usbhsg_irq_ready_ctrl,
 503 };
 504
 505 static struct usbhsg_pipe_handle usbhsg_handler_ctrl_stage_end = {
 506         .prepare        = usbhsg_try_run_ctrl_stage_end,
 507         .try_run        = usbhsg_try_run_ctrl_stage_end,
 508 };
 509
 510 /*
 511  * DCP pipe can NOT use "ready interrupt" for "send"
 512  * it should use "empty" interrupt.
 513  * see
 514  *   "Operation" - "Interrupt Function" - "BRDY Interrupt"
 515  *
 516  * on the other hand, normal pipe can use "ready interrupt" for "send"
 517  * even though it is single/double buffer
 518  */
 519 #define usbhsg_handler_send_ctrl        usbhsg_handler_send_by_empty
 520 #define usbhsg_handler_recv_ctrl        usbhsg_handler_recv_by_ready
 521
 522 #define usbhsg_handler_send_packet      usbhsg_handler_send_by_ready
 523 #define usbhsg_handler_recv_packet      usbhsg_handler_recv_by_ready
 524
 525 /*
 526  *              USB_TYPE_STANDARD / clear feature functions
 527  */
 528 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 529                                                  struct usbhsg_uep *uep,
 530                                                  struct usb_ctrlrequest *ctrl)
 531 {
 532         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 533         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 534         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 535
 536         usbhs_dcp_control_transfer_done(pipe);
 537
 538         return 0;
 539 }
 540
 541 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 542                                                    struct usbhsg_uep *uep,
 543                                                    struct usb_ctrlrequest *ctrl)
 544 {
 545         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 546         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 547
 548         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 549                 usbhs_fifo_disable(pipe);
 550                 usbhs_pipe_clear_sequence(pipe);
 551                 usbhs_fifo_enable(pipe);
 552         }
 553
 554         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 555
 556         usbhsg_queue_prepare(uep);
 557
 558         return 0;
 559 }
 560
 561 struct usbhsg_recip_handle req_clear_feature = {
 562         .name           = "clear feature",
 563         .device         = usbhsg_recip_handler_std_control_done,
 564         .interface      = usbhsg_recip_handler_std_control_done,
 565         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 566 };
 567
 568 /*
 569  *              USB_TYPE handler
 570  */
 571 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 572                                    struct usbhsg_recip_handle *handler,
 573                                    struct usb_ctrlrequest *ctrl)
 574 {
 575         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 576         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 577         struct usbhsg_uep *uep;
 578         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 579         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 580         int ret;
 581         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 582                     struct usb_ctrlrequest *ctrl);
 583         char *msg;
 584
 585         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 586         if (!usbhsg_uep_to_pipe(uep)) {
 587                 dev_err(dev, "wrong recip request\n");
 588                 return -EINVAL;
 589         }
 590
 591         switch (recip) {
 592         case USB_RECIP_DEVICE:
 593                 msg     = "DEVICE";
 594                 func    = handler->device;
 595                 break;
 596         case USB_RECIP_INTERFACE:
 597                 msg     = "INTERFACE";
 598                 func    = handler->interface;
 599                 break;
 600         case USB_RECIP_ENDPOINT:
 601                 msg     = "ENDPOINT";
 602                 func    = handler->endpoint;
 603                 break;
 604         default:
 605                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 606                 func = NULL;
 607                 ret = -EINVAL;
 608         }
 609
 610         if (func) {
 611                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 612                 ret = func(priv, uep, ctrl);
 613         }
 614
 615         return ret;
 616 }
 617
 618 /*
 619  *              irq functions
 620  *
 621  * it will be called from usbhs_interrupt
 622  */
 623 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 624                                 struct usbhs_irq_state *irq_state)
 625 {
 626         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 627         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 628
 629         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
 630
 631         dev_dbg(dev, "state = %x : speed : %d\n",
 632                 usbhs_status_get_device_state(irq_state),
 633                 gpriv->gadget.speed);
 634
 635         return 0;
 636 }
 637
 638 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 639                                  struct usbhs_irq_state *irq_state)
 640 {
 641         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 642         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 643         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 644         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 645         struct usb_ctrlrequest ctrl;
 646         struct usbhsg_recip_handle *recip_handler = NULL;
 647         int stage = usbhs_status_get_ctrl_stage(irq_state);
 648         int ret = 0;
 649
 650         dev_dbg(dev, "stage = %d\n", stage);
 651
 652         /*
 653          * see Manual
 654          *
 655          *  "Operation"
 656          *  - "Interrupt Function"
 657          *    - "Control Transfer Stage Transition Interrupt"
 658          *      - Fig. "Control Transfer Stage Transitions"
 659          */
 660
 661         switch (stage) {
 662         case READ_DATA_STAGE:
 663                 dcp->handler = &usbhsg_handler_send_ctrl;
 664                 break;
 665         case WRITE_DATA_STAGE:
 666                 dcp->handler = &usbhsg_handler_recv_ctrl;
 667                 break;
 668         case NODATA_STATUS_STAGE:
 669                 dcp->handler = &usbhsg_handler_ctrl_stage_end;
 670                 break;
 671         default:
 672                 return ret;
 673         }
 674
 675         /*
 676          * get usb request
 677          */
 678         usbhs_usbreq_get_val(priv, &ctrl);
 679
 680         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 681         case USB_TYPE_STANDARD:
 682                 switch (ctrl.bRequest) {
 683                 case USB_REQ_CLEAR_FEATURE:
 684                         recip_handler = &req_clear_feature;
 685                         break;
 686                 }
 687         }
 688
 689         /*
 690          * setup stage / run recip
 691          */
 692         if (recip_handler)
 693                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 694         else
 695                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 696
 697         if (ret < 0)
 698                 usbhs_fifo_stall(pipe);
 699
 700         return ret;
 701 }
 702
 703 static int usbhsg_irq_empty(struct usbhs_priv *priv,
 704                             struct usbhs_irq_state *irq_state)
 705 {
 706         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 707         struct usbhsg_uep *uep;
 708         struct usbhs_pipe *pipe;
 709         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 710         int i, ret;
 711
 712         if (!irq_state->bempsts) {
 713                 dev_err(dev, "debug %s !!\n", __func__);
 714                 return -EIO;
 715         }
 716
 717         dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
 718
 719         /*
 720          * search interrupted "pipe"
 721          * not "uep".
 722          */
 723         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 724                 if (!(irq_state->bempsts & (1 << i)))
 725                         continue;
 726
 727                 uep     = usbhsg_pipe_to_uep(pipe);
 728                 ret     = usbhsg_queue_handle(uep);
 729                 if (ret < 0)
 730                         dev_err(dev, "send error %d : %d\n", i, ret);
 731         }
 732
 733         return 0;
 734 }
 735
 736 static int usbhsg_irq_ready(struct usbhs_priv *priv,
 737                             struct usbhs_irq_state *irq_state)
 738 {
 739         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 740         struct usbhsg_uep *uep;
 741         struct usbhs_pipe *pipe;
 742         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 743         int i, ret;
 744
 745         if (!irq_state->brdysts) {
 746                 dev_err(dev, "debug %s !!\n", __func__);
 747                 return -EIO;
 748         }
 749
 750         dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
 751
 752         /*
 753          * search interrupted "pipe"
 754          * not "uep".
 755          */
 756         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 757                 if (!(irq_state->brdysts & (1 << i)))
 758                         continue;
 759
 760                 uep     = usbhsg_pipe_to_uep(pipe);
 761                 ret     = usbhsg_queue_handle(uep);
 762                 if (ret < 0)
 763                         dev_err(dev, "receive error %d : %d\n", i, ret);
 764         }
 765
 766         return 0;
 767 }
 768
 769 /*
 770  *
 771  *              usb_dcp_ops
 772  *
 773  */
 774 static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
 775 {
 776         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 777         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 778         struct usbhs_pipe *pipe;
 779
 780         /*
 781          *********  assume under spin lock  *********
 782          */
 783
 784         pipe = usbhs_dcp_malloc(priv);
 785         if (!pipe)
 786                 return -EIO;
 787
 788         uep->pipe               = pipe;
 789         uep->pipe->mod_private  = uep;
 790         INIT_LIST_HEAD(&uep->list);
 791
 792         return 0;
 793 }
 794
 795 #define usbhsg_dcp_disable usbhsg_pipe_disable
 796 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 797 {
 798         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 799         struct usbhsg_request *ureq;
 800         int disable = 0;
 801
 802         /*
 803          *********  assume under spin lock  *********
 804          */
 805
 806         usbhs_fifo_disable(pipe);
 807
 808         /*
 809          * disable pipe irq
 810          */
 811         usbhsg_irq_empty_ctrl(uep, disable);
 812         usbhsg_irq_ready_ctrl(uep, disable);
 813
 814         while (1) {
 815                 ureq = usbhsg_queue_get(uep);
 816                 if (!ureq)
 817                         break;
 818
 819                 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 820         }
 821
 822         return 0;
 823 }
 824
 825 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 826 {
 827         int i;
 828         struct usbhsg_uep *uep;
 829
 830         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 831                 uep->pipe = NULL;
 832 }
 833
 834 /*
 835  *
 836  *              usb_ep_ops
 837  *
 838  */
 839 static int usbhsg_ep_enable(struct usb_ep *ep,
 840                          const struct usb_endpoint_descriptor *desc)
 841 {
 842         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 843         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 844         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 845         struct usbhs_pipe *pipe;
 846         spinlock_t *lock;
 847         unsigned long flags;
 848         int ret = -EIO;
 849
 850         /*
 851          * if it already have pipe,
 852          * nothing to do
 853          */
 854         if (uep->pipe)
 855                 return 0;
 856
 857         /********************  spin lock ********************/
 858         lock = usbhsg_trylock(gpriv, &flags);
 859
 860         pipe = usbhs_pipe_malloc(priv, desc);
 861         if (pipe) {
 862                 uep->pipe               = pipe;
 863                 pipe->mod_private       = uep;
 864                 INIT_LIST_HEAD(&uep->list);
 865
 866                 if (usb_endpoint_dir_in(desc))
 867                         uep->handler = &usbhsg_handler_send_packet;
 868                 else
 869                         uep->handler = &usbhsg_handler_recv_packet;
 870
 871                 ret = 0;
 872         }
 873
 874         usbhsg_unlock(lock, &flags);
 875         /********************  spin unlock ******************/
 876
 877         return ret;
 878 }
 879
 880 static int usbhsg_ep_disable(struct usb_ep *ep)
 881 {
 882         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 883         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 884         spinlock_t *lock;
 885         unsigned long flags;
 886         int ret;
 887
 888         /********************  spin lock ********************/
 889         lock = usbhsg_trylock(gpriv, &flags);
 890
 891         ret = usbhsg_pipe_disable(uep);
 892
 893         usbhsg_unlock(lock, &flags);
 894         /********************  spin unlock ******************/
 895
 896         return ret;
 897 }
 898
 899 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 900                                                    gfp_t gfp_flags)
 901 {
 902         struct usbhsg_request *ureq;
 903
 904         ureq = kzalloc(sizeof *ureq, gfp_flags);
 905         if (!ureq)
 906                 return NULL;
 907
 908         INIT_LIST_HEAD(&ureq->node);
 909         return &ureq->req;
 910 }
 911
 912 static void usbhsg_ep_free_request(struct usb_ep *ep,
 913                                    struct usb_request *req)
 914 {
 915         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 916
 917         WARN_ON(!list_empty(&ureq->node));
 918         kfree(ureq);
 919 }
 920
 921 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 922                           gfp_t gfp_flags)
 923 {
 924         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 925         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 926         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 927         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 928         spinlock_t *lock;
 929         unsigned long flags;
 930         int ret = 0;
 931
 932         /*
 933          * CAUTION [*endpoint queue*]
 934          *
 935          * This function will be called from usb_request :: complete
 936          * or usb driver timing.
 937          * If this function is called from usb_request :: complete,
 938          * it is already under spinlock on this driver.
 939          * but it is called frm usb driver, this function should call spinlock.
 940          *
 941          * This function is using usbshg_trylock to solve this issue.
 942          * if "is_locked" is 1, this mean this function lock it.
 943          * but if it is 0, this mean it is already under spin lock.
 944          * see also
 945          *   CAUTION [*queue handler*]
 946          *   CAUTION [*request complete*]
 947          */
 948
 949         /********************  spin lock ********************/
 950         lock = usbhsg_trylock(gpriv, &flags);
 951
 952         /* param check */
 953         if (usbhsg_is_not_connected(gpriv)      ||
 954             unlikely(!gpriv->driver)            ||
 955             unlikely(!pipe))
 956                 ret = -ESHUTDOWN;
 957         else
 958                 usbhsg_queue_push(uep, ureq);
 959
 960         usbhsg_unlock(lock, &flags);
 961         /********************  spin unlock ******************/
 962
 963         usbhsg_queue_prepare(uep);
 964
 965         return ret;
 966 }
 967
 968 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 969 {
 970         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 971         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 972         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 973         spinlock_t *lock;
 974         unsigned long flags;
 975
 976         /*
 977          * see
 978          *   CAUTION [*queue handler*]
 979          *   CAUTION [*endpoint queue*]
 980          *   CAUTION [*request complete*]
 981          */
 982
 983         /********************  spin lock ********************/
 984         lock = usbhsg_trylock(gpriv, &flags);
 985
 986         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 987
 988         usbhsg_unlock(lock, &flags);
 989         /********************  spin unlock ******************/
 990
 991         return 0;
 992 }
 993
 994 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 995 {
 996         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 997         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 998         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 999         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1000         spinlock_t *lock;
1001         unsigned long flags;
1002         int ret = -EAGAIN;
1003
1004         /*
1005          * see
1006          *   CAUTION [*queue handler*]
1007          *   CAUTION [*endpoint queue*]
1008          *   CAUTION [*request complete*]
1009          */
1010
1011         /********************  spin lock ********************/
1012         lock = usbhsg_trylock(gpriv, &flags);
1013         if (!usbhsg_queue_get(uep)) {
1014
1015                 dev_dbg(dev, "set halt %d (pipe %d)\n",
1016                         halt, usbhs_pipe_number(pipe));
1017
1018                 if (halt)
1019                         usbhs_fifo_stall(pipe);
1020                 else
1021                         usbhs_fifo_disable(pipe);
1022
1023                 if (halt && wedge)
1024                         usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
1025                 else
1026                         usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
1027
1028                 ret = 0;
1029         }
1030
1031         usbhsg_unlock(lock, &flags);
1032         /********************  spin unlock ******************/
1033
1034         return ret;
1035 }
1036
1037 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
1038 {
1039         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
1040 }
1041
1042 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
1043 {
1044         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
1045 }
1046
1047 static struct usb_ep_ops usbhsg_ep_ops = {
1048         .enable         = usbhsg_ep_enable,
1049         .disable        = usbhsg_ep_disable,
1050
1051         .alloc_request  = usbhsg_ep_alloc_request,
1052         .free_request   = usbhsg_ep_free_request,
1053
1054         .queue          = usbhsg_ep_queue,
1055         .dequeue        = usbhsg_ep_dequeue,
1056
1057         .set_halt       = usbhsg_ep_set_halt,
1058         .set_wedge      = usbhsg_ep_set_wedge,
1059 };
1060
1061 /*
1062  *              usb module start/end
1063  */
1064 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
1065 {
1066         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1067         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1068         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1069         struct device *dev = usbhs_priv_to_dev(priv);
1070         spinlock_t *lock;
1071         unsigned long flags;
1072
1073         /********************  spin lock ********************/
1074         lock = usbhsg_trylock(gpriv, &flags);
1075
1076         /*
1077          * enable interrupt and systems if ready
1078          */
1079         usbhsg_status_set(gpriv, status);
1080         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1081               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
1082                 goto usbhsg_try_start_unlock;
1083
1084         dev_dbg(dev, "start gadget\n");
1085
1086         /*
1087          * pipe initialize and enable DCP
1088          */
1089         usbhs_pipe_init(priv);
1090         usbhsg_uep_init(gpriv);
1091         usbhsg_dcp_enable(dcp);
1092
1093         /*
1094          * system config enble
1095          * - HI speed
1096          * - function
1097          * - usb module
1098          */
1099         usbhs_sys_hispeed_ctrl(priv, 1);
1100         usbhs_sys_function_ctrl(priv, 1);
1101         usbhs_sys_usb_ctrl(priv, 1);
1102
1103         /*
1104          * enable irq callback
1105          */
1106         mod->irq_dev_state      = usbhsg_irq_dev_state;
1107         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
1108         mod->irq_empty          = usbhsg_irq_empty;
1109         mod->irq_ready          = usbhsg_irq_ready;
1110         mod->irq_bempsts        = 0;
1111         mod->irq_brdysts        = 0;
1112         usbhs_irq_callback_update(priv, mod);
1113
1114 usbhsg_try_start_unlock:
1115         usbhsg_unlock(lock, &flags);
1116         /********************  spin unlock ********************/
1117
1118         return 0;
1119 }
1120
1121 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
1122 {
1123         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1124         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1125         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1126         struct device *dev = usbhs_priv_to_dev(priv);
1127         spinlock_t *lock;
1128         unsigned long flags;
1129
1130         /********************  spin lock ********************/
1131         lock = usbhsg_trylock(gpriv, &flags);
1132
1133         /*
1134          * disable interrupt and systems if 1st try
1135          */
1136         usbhsg_status_clr(gpriv, status);
1137         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1138             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
1139                 goto usbhsg_try_stop_unlock;
1140
1141         /* disable all irq */
1142         mod->irq_dev_state      = NULL;
1143         mod->irq_ctrl_stage     = NULL;
1144         mod->irq_empty          = NULL;
1145         mod->irq_ready          = NULL;
1146         mod->irq_bempsts        = 0;
1147         mod->irq_brdysts        = 0;
1148         usbhs_irq_callback_update(priv, mod);
1149
1150         usbhsg_dcp_disable(dcp);
1151
1152         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
1153
1154         /* disable sys */
1155         usbhs_sys_hispeed_ctrl(priv, 0);
1156         usbhs_sys_function_ctrl(priv, 0);
1157         usbhs_sys_usb_ctrl(priv, 0);
1158
1159         usbhsg_unlock(lock, &flags);
1160         /********************  spin unlock ********************/
1161
1162         if (gpriv->driver &&
1163             gpriv->driver->disconnect)
1164                 gpriv->driver->disconnect(&gpriv->gadget);
1165
1166         dev_dbg(dev, "stop gadget\n");
1167
1168         return 0;
1169
1170 usbhsg_try_stop_unlock:
1171         usbhsg_unlock(lock, &flags);
1172
1173         return 0;
1174 }
1175
1176 /*
1177  *
1178  *              linux usb function
1179  *
1180  */
1181 struct usbhsg_gpriv *the_controller;
1182 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1183                             int (*bind)(struct usb_gadget *))
1184 {
1185         struct usbhsg_gpriv *gpriv = the_controller;
1186         struct usbhs_priv *priv;
1187         struct device *dev;
1188         int ret;
1189
1190         if (!bind               ||
1191             !driver             ||
1192             !driver->setup      ||
1193             driver->speed != USB_SPEED_HIGH)
1194                 return -EINVAL;
1195         if (!gpriv)
1196                 return -ENODEV;
1197         if (gpriv->driver)
1198                 return -EBUSY;
1199
1200         dev  = usbhsg_gpriv_to_dev(gpriv);
1201         priv = usbhsg_gpriv_to_priv(gpriv);
1202
1203         /* first hook up the driver ... */
1204         gpriv->driver = driver;
1205         gpriv->gadget.dev.driver = &driver->driver;
1206
1207         ret = device_add(&gpriv->gadget.dev);
1208         if (ret) {
1209                 dev_err(dev, "device_add error %d\n", ret);
1210                 goto add_fail;
1211         }
1212
1213         ret = bind(&gpriv->gadget);
1214         if (ret) {
1215                 dev_err(dev, "bind to driver %s error %d\n",
1216                         driver->driver.name, ret);
1217                 goto bind_fail;
1218         }
1219
1220         dev_dbg(dev, "bind %s\n", driver->driver.name);
1221
1222         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
1223
1224 bind_fail:
1225         device_del(&gpriv->gadget.dev);
1226 add_fail:
1227         gpriv->driver = NULL;
1228         gpriv->gadget.dev.driver = NULL;
1229
1230         return ret;
1231 }
1232 EXPORT_SYMBOL(usb_gadget_probe_driver);
1233
1234 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1235 {
1236         struct usbhsg_gpriv *gpriv = the_controller;
1237         struct usbhs_priv *priv;
1238         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1239
1240         if (!gpriv)
1241                 return -ENODEV;
1242
1243         if (!driver             ||
1244             !driver->unbind     ||
1245             driver != gpriv->driver)
1246                 return -EINVAL;
1247
1248         dev  = usbhsg_gpriv_to_dev(gpriv);
1249         priv = usbhsg_gpriv_to_priv(gpriv);
1250
1251         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
1252         device_del(&gpriv->gadget.dev);
1253         gpriv->driver = NULL;
1254
1255         if (driver->disconnect)
1256                 driver->disconnect(&gpriv->gadget);
1257
1258         driver->unbind(&gpriv->gadget);
1259         dev_dbg(dev, "unbind %s\n", driver->driver.name);
1260
1261         return 0;
1262 }
1263 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1264
1265 /*
1266  *              usb gadget ops
1267  */
1268 static int usbhsg_get_frame(struct usb_gadget *gadget)
1269 {
1270         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1271         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1272
1273         return usbhs_frame_get_num(priv);
1274 }
1275
1276 static struct usb_gadget_ops usbhsg_gadget_ops = {
1277         .get_frame              = usbhsg_get_frame,
1278 };
1279
1280 static int usbhsg_start(struct usbhs_priv *priv)
1281 {
1282         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1283 }
1284
1285 static int usbhsg_stop(struct usbhs_priv *priv)
1286 {
1287         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1288 }
1289
1290 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1291 {
1292         struct usbhsg_gpriv *gpriv;
1293         struct usbhsg_uep *uep;
1294         struct device *dev = usbhs_priv_to_dev(priv);
1295         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1296         int i;
1297
1298         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1299         if (!gpriv) {
1300                 dev_err(dev, "Could not allocate gadget priv\n");
1301                 return -ENOMEM;
1302         }
1303
1304         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1305         if (!uep) {
1306                 dev_err(dev, "Could not allocate ep\n");
1307                 goto usbhs_mod_gadget_probe_err_gpriv;
1308         }
1309
1310         /*
1311          * CAUTION
1312          *
1313          * There is no guarantee that it is possible to access usb module here.
1314          * Don't accesses to it.
1315          * The accesse will be enable after "usbhsg_start"
1316          */
1317
1318         /*
1319          * register itself
1320          */
1321         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1322
1323         /* init gpriv */
1324         gpriv->mod.name         = "gadget";
1325         gpriv->mod.start        = usbhsg_start;
1326         gpriv->mod.stop         = usbhsg_stop;
1327         gpriv->uep              = uep;
1328         gpriv->uep_size         = pipe_size;
1329         usbhsg_status_init(gpriv);
1330
1331         /*
1332          * init gadget
1333          */
1334         device_initialize(&gpriv->gadget.dev);
1335         dev_set_name(&gpriv->gadget.dev, "gadget");
1336         gpriv->gadget.dev.parent        = dev;
1337         gpriv->gadget.name              = "renesas_usbhs_udc";
1338         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1339         gpriv->gadget.is_dualspeed      = 1;
1340
1341         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1342
1343         /*
1344          * init usb_ep
1345          */
1346         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1347                 uep->gpriv      = gpriv;
1348                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1349
1350                 uep->ep.name            = uep->ep_name;
1351                 uep->ep.ops             = &usbhsg_ep_ops;
1352                 INIT_LIST_HEAD(&uep->ep.ep_list);
1353                 INIT_LIST_HEAD(&uep->list);
1354
1355                 /* init DCP */
1356                 if (usbhsg_is_dcp(uep)) {
1357                         gpriv->gadget.ep0 = &uep->ep;
1358                         uep->ep.maxpacket = 64;
1359                 }
1360                 /* init normal pipe */
1361                 else {
1362                         uep->ep.maxpacket = 512;
1363                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1364                 }
1365         }
1366
1367         the_controller = gpriv;
1368
1369         dev_info(dev, "gadget probed\n");
1370
1371         return 0;
1372
1373 usbhs_mod_gadget_probe_err_gpriv:
1374         kfree(gpriv);
1375
1376         return -ENOMEM;
1377 }
1378
1379 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1380 {
1381         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1382
1383         kfree(gpriv);
1384 }