Pileus Git - ~andy/linux/blob - 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
 587         switch (recip) {
 588         case USB_RECIP_DEVICE:
 589                 msg     = "DEVICE";
 590                 func    = handler->device;
 591                 break;
 592         case USB_RECIP_INTERFACE:
 593                 msg     = "INTERFACE";
 594                 func    = handler->interface;
 595                 break;
 596         case USB_RECIP_ENDPOINT:
 597                 msg     = "ENDPOINT";
 598                 func    = handler->endpoint;
 599                 break;
 600         default:
 601                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 602                 func = NULL;
 603                 ret = -EINVAL;
 604         }
 605
 606         if (func) {
 607                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 608                 ret = func(priv, uep, ctrl);
 609         }
 610
 611         return ret;
 612 }
 613
 614 /*
 615  *              irq functions
 616  *
 617  * it will be called from usbhs_interrupt
 618  */
 619 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 620                                 struct usbhs_irq_state *irq_state)
 621 {
 622         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 623         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 624
 625         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
 626
 627         dev_dbg(dev, "state = %x : speed : %d\n",
 628                 usbhs_status_get_device_state(irq_state),
 629                 gpriv->gadget.speed);
 630
 631         return 0;
 632 }
 633
 634 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 635                                  struct usbhs_irq_state *irq_state)
 636 {
 637         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 638         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 639         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 640         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 641         struct usb_ctrlrequest ctrl;
 642         struct usbhsg_recip_handle *recip_handler = NULL;
 643         int stage = usbhs_status_get_ctrl_stage(irq_state);
 644         int ret = 0;
 645
 646         dev_dbg(dev, "stage = %d\n", stage);
 647
 648         /*
 649          * see Manual
 650          *
 651          *  "Operation"
 652          *  - "Interrupt Function"
 653          *    - "Control Transfer Stage Transition Interrupt"
 654          *      - Fig. "Control Transfer Stage Transitions"
 655          */
 656
 657         switch (stage) {
 658         case READ_DATA_STAGE:
 659                 dcp->handler = &usbhsg_handler_send_ctrl;
 660                 break;
 661         case WRITE_DATA_STAGE:
 662                 dcp->handler = &usbhsg_handler_recv_ctrl;
 663                 break;
 664         case NODATA_STATUS_STAGE:
 665                 dcp->handler = &usbhsg_handler_ctrl_stage_end;
 666                 break;
 667         default:
 668                 return ret;
 669         }
 670
 671         /*
 672          * get usb request
 673          */
 674         usbhs_usbreq_get_val(priv, &ctrl);
 675
 676         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 677         case USB_TYPE_STANDARD:
 678                 switch (ctrl.bRequest) {
 679                 case USB_REQ_CLEAR_FEATURE:
 680                         recip_handler = &req_clear_feature;
 681                         break;
 682                 }
 683         }
 684
 685         /*
 686          * setup stage / run recip
 687          */
 688         if (recip_handler)
 689                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 690         else
 691                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 692
 693         if (ret < 0)
 694                 usbhs_fifo_stall(pipe);
 695
 696         return ret;
 697 }
 698
 699 static int usbhsg_irq_empty(struct usbhs_priv *priv,
 700                             struct usbhs_irq_state *irq_state)
 701 {
 702         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 703         struct usbhsg_uep *uep;
 704         struct usbhs_pipe *pipe;
 705         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 706         int i, ret;
 707
 708         if (!irq_state->bempsts) {
 709                 dev_err(dev, "debug %s !!\n", __func__);
 710                 return -EIO;
 711         }
 712
 713         dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
 714
 715         /*
 716          * search interrupted "pipe"
 717          * not "uep".
 718          */
 719         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 720                 if (!(irq_state->bempsts & (1 << i)))
 721                         continue;
 722
 723                 uep     = usbhsg_pipe_to_uep(pipe);
 724                 ret     = usbhsg_queue_handle(uep);
 725                 if (ret < 0)
 726                         dev_err(dev, "send error %d : %d\n", i, ret);
 727         }
 728
 729         return 0;
 730 }
 731
 732 static int usbhsg_irq_ready(struct usbhs_priv *priv,
 733                             struct usbhs_irq_state *irq_state)
 734 {
 735         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 736         struct usbhsg_uep *uep;
 737         struct usbhs_pipe *pipe;
 738         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 739         int i, ret;
 740
 741         if (!irq_state->brdysts) {
 742                 dev_err(dev, "debug %s !!\n", __func__);
 743                 return -EIO;
 744         }
 745
 746         dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
 747
 748         /*
 749          * search interrupted "pipe"
 750          * not "uep".
 751          */
 752         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 753                 if (!(irq_state->brdysts & (1 << i)))
 754                         continue;
 755
 756                 uep     = usbhsg_pipe_to_uep(pipe);
 757                 ret     = usbhsg_queue_handle(uep);
 758                 if (ret < 0)
 759                         dev_err(dev, "receive error %d : %d\n", i, ret);
 760         }
 761
 762         return 0;
 763 }
 764
 765 /*
 766  *
 767  *              usb_dcp_ops
 768  *
 769  */
 770 static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
 771 {
 772         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 773         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 774         struct usbhs_pipe *pipe;
 775
 776         /*
 777          *********  assume under spin lock  *********
 778          */
 779
 780         pipe = usbhs_dcp_malloc(priv);
 781         if (!pipe)
 782                 return -EIO;
 783
 784         uep->pipe               = pipe;
 785         uep->pipe->mod_private  = uep;
 786         INIT_LIST_HEAD(&uep->list);
 787
 788         return 0;
 789 }
 790
 791 #define usbhsg_dcp_disable usbhsg_pipe_disable
 792 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 793 {
 794         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 795         struct usbhsg_request *ureq;
 796         int disable = 0;
 797
 798         /*
 799          *********  assume under spin lock  *********
 800          */
 801
 802         usbhs_fifo_disable(pipe);
 803
 804         /*
 805          * disable pipe irq
 806          */
 807         usbhsg_irq_empty_ctrl(uep, disable);
 808         usbhsg_irq_ready_ctrl(uep, disable);
 809
 810         while (1) {
 811                 ureq = usbhsg_queue_get(uep);
 812                 if (!ureq)
 813                         break;
 814
 815                 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 816         }
 817
 818         return 0;
 819 }
 820
 821 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 822 {
 823         int i;
 824         struct usbhsg_uep *uep;
 825
 826         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 827                 uep->pipe = NULL;
 828 }
 829
 830 /*
 831  *
 832  *              usb_ep_ops
 833  *
 834  */
 835 static int usbhsg_ep_enable(struct usb_ep *ep,
 836                          const struct usb_endpoint_descriptor *desc)
 837 {
 838         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 839         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 840         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 841         struct usbhs_pipe *pipe;
 842         spinlock_t *lock;
 843         unsigned long flags;
 844         int ret = -EIO;
 845
 846         /*
 847          * if it already have pipe,
 848          * nothing to do
 849          */
 850         if (uep->pipe)
 851                 return 0;
 852
 853         /********************  spin lock ********************/
 854         lock = usbhsg_trylock(gpriv, &flags);
 855
 856         pipe = usbhs_pipe_malloc(priv, desc);
 857         if (pipe) {
 858                 uep->pipe               = pipe;
 859                 pipe->mod_private       = uep;
 860                 INIT_LIST_HEAD(&uep->list);
 861
 862                 if (usb_endpoint_dir_in(desc))
 863                         uep->handler = &usbhsg_handler_send_packet;
 864                 else
 865                         uep->handler = &usbhsg_handler_recv_packet;
 866
 867                 ret = 0;
 868         }
 869
 870         usbhsg_unlock(lock, &flags);
 871         /********************  spin unlock ******************/
 872
 873         return ret;
 874 }
 875
 876 static int usbhsg_ep_disable(struct usb_ep *ep)
 877 {
 878         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 879         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 880         spinlock_t *lock;
 881         unsigned long flags;
 882         int ret;
 883
 884         /********************  spin lock ********************/
 885         lock = usbhsg_trylock(gpriv, &flags);
 886
 887         ret = usbhsg_pipe_disable(uep);
 888
 889         usbhsg_unlock(lock, &flags);
 890         /********************  spin unlock ******************/
 891
 892         return ret;
 893 }
 894
 895 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 896                                                    gfp_t gfp_flags)
 897 {
 898         struct usbhsg_request *ureq;
 899
 900         ureq = kzalloc(sizeof *ureq, gfp_flags);
 901         if (!ureq)
 902                 return NULL;
 903
 904         INIT_LIST_HEAD(&ureq->node);
 905         return &ureq->req;
 906 }
 907
 908 static void usbhsg_ep_free_request(struct usb_ep *ep,
 909                                    struct usb_request *req)
 910 {
 911         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 912
 913         WARN_ON(!list_empty(&ureq->node));
 914         kfree(ureq);
 915 }
 916
 917 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 918                           gfp_t gfp_flags)
 919 {
 920         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 921         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 922         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 923         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 924         spinlock_t *lock;
 925         unsigned long flags;
 926         int ret = 0;
 927
 928         /*
 929          * CAUTION [*endpoint queue*]
 930          *
 931          * This function will be called from usb_request :: complete
 932          * or usb driver timing.
 933          * If this function is called from usb_request :: complete,
 934          * it is already under spinlock on this driver.
 935          * but it is called frm usb driver, this function should call spinlock.
 936          *
 937          * This function is using usbshg_trylock to solve this issue.
 938          * if "is_locked" is 1, this mean this function lock it.
 939          * but if it is 0, this mean it is already under spin lock.
 940          * see also
 941          *   CAUTION [*queue handler*]
 942          *   CAUTION [*request complete*]
 943          */
 944
 945         /********************  spin lock ********************/
 946         lock = usbhsg_trylock(gpriv, &flags);
 947
 948         /* param check */
 949         if (usbhsg_is_not_connected(gpriv)      ||
 950             unlikely(!gpriv->driver)            ||
 951             unlikely(!pipe))
 952                 ret = -ESHUTDOWN;
 953         else
 954                 usbhsg_queue_push(uep, ureq);
 955
 956         usbhsg_unlock(lock, &flags);
 957         /********************  spin unlock ******************/
 958
 959         usbhsg_queue_prepare(uep);
 960
 961         return ret;
 962 }
 963
 964 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 965 {
 966         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 967         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 968         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 969         spinlock_t *lock;
 970         unsigned long flags;
 971
 972         /*
 973          * see
 974          *   CAUTION [*queue handler*]
 975          *   CAUTION [*endpoint queue*]
 976          *   CAUTION [*request complete*]
 977          */
 978
 979         /********************  spin lock ********************/
 980         lock = usbhsg_trylock(gpriv, &flags);
 981
 982         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 983
 984         usbhsg_unlock(lock, &flags);
 985         /********************  spin unlock ******************/
 986
 987         return 0;
 988 }
 989
 990 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 991 {
 992         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 993         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 994         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 995         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 996         spinlock_t *lock;
 997         unsigned long flags;
 998         int ret = -EAGAIN;
 999
1000         /*
1001          * see
1002          *   CAUTION [*queue handler*]
1003          *   CAUTION [*endpoint queue*]
1004          *   CAUTION [*request complete*]
1005          */
1006
1007         /********************  spin lock ********************/
1008         lock = usbhsg_trylock(gpriv, &flags);
1009         if (!usbhsg_queue_get(uep)) {
1010
1011                 dev_dbg(dev, "set halt %d (pipe %d)\n",
1012                         halt, usbhs_pipe_number(pipe));
1013
1014                 if (halt)
1015                         usbhs_fifo_stall(pipe);
1016                 else
1017                         usbhs_fifo_disable(pipe);
1018
1019                 if (halt && wedge)
1020                         usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
1021                 else
1022                         usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
1023
1024                 ret = 0;
1025         }
1026
1027         usbhsg_unlock(lock, &flags);
1028         /********************  spin unlock ******************/
1029
1030         return ret;
1031 }
1032
1033 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
1034 {
1035         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
1036 }
1037
1038 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
1039 {
1040         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
1041 }
1042
1043 static struct usb_ep_ops usbhsg_ep_ops = {
1044         .enable         = usbhsg_ep_enable,
1045         .disable        = usbhsg_ep_disable,
1046
1047         .alloc_request  = usbhsg_ep_alloc_request,
1048         .free_request   = usbhsg_ep_free_request,
1049
1050         .queue          = usbhsg_ep_queue,
1051         .dequeue        = usbhsg_ep_dequeue,
1052
1053         .set_halt       = usbhsg_ep_set_halt,
1054         .set_wedge      = usbhsg_ep_set_wedge,
1055 };
1056
1057 /*
1058  *              usb module start/end
1059  */
1060 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
1061 {
1062         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1063         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1064         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1065         struct device *dev = usbhs_priv_to_dev(priv);
1066         spinlock_t *lock;
1067         unsigned long flags;
1068
1069         /********************  spin lock ********************/
1070         lock = usbhsg_trylock(gpriv, &flags);
1071
1072         /*
1073          * enable interrupt and systems if ready
1074          */
1075         usbhsg_status_set(gpriv, status);
1076         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1077               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
1078                 goto usbhsg_try_start_unlock;
1079
1080         dev_dbg(dev, "start gadget\n");
1081
1082         /*
1083          * pipe initialize and enable DCP
1084          */
1085         usbhs_pipe_init(priv);
1086         usbhsg_uep_init(gpriv);
1087         usbhsg_dcp_enable(dcp);
1088
1089         /*
1090          * system config enble
1091          * - HI speed
1092          * - function
1093          * - usb module
1094          */
1095         usbhs_sys_hispeed_ctrl(priv, 1);
1096         usbhs_sys_function_ctrl(priv, 1);
1097         usbhs_sys_usb_ctrl(priv, 1);
1098
1099         /*
1100          * enable irq callback
1101          */
1102         mod->irq_dev_state      = usbhsg_irq_dev_state;
1103         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
1104         mod->irq_empty          = usbhsg_irq_empty;
1105         mod->irq_ready          = usbhsg_irq_ready;
1106         mod->irq_bempsts        = 0;
1107         mod->irq_brdysts        = 0;
1108         usbhs_irq_callback_update(priv, mod);
1109
1110 usbhsg_try_start_unlock:
1111         usbhsg_unlock(lock, &flags);
1112         /********************  spin unlock ********************/
1113
1114         return 0;
1115 }
1116
1117 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
1118 {
1119         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1120         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1121         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1122         struct device *dev = usbhs_priv_to_dev(priv);
1123         spinlock_t *lock;
1124         unsigned long flags;
1125
1126         /********************  spin lock ********************/
1127         lock = usbhsg_trylock(gpriv, &flags);
1128
1129         /*
1130          * disable interrupt and systems if 1st try
1131          */
1132         usbhsg_status_clr(gpriv, status);
1133         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1134             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
1135                 goto usbhsg_try_stop_unlock;
1136
1137         /* disable all irq */
1138         mod->irq_dev_state      = NULL;
1139         mod->irq_ctrl_stage     = NULL;
1140         mod->irq_empty          = NULL;
1141         mod->irq_ready          = NULL;
1142         mod->irq_bempsts        = 0;
1143         mod->irq_brdysts        = 0;
1144         usbhs_irq_callback_update(priv, mod);
1145
1146         usbhsg_dcp_disable(dcp);
1147
1148         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
1149
1150         /* disable sys */
1151         usbhs_sys_hispeed_ctrl(priv, 0);
1152         usbhs_sys_function_ctrl(priv, 0);
1153         usbhs_sys_usb_ctrl(priv, 0);
1154
1155         usbhsg_unlock(lock, &flags);
1156         /********************  spin unlock ********************/
1157
1158         if (gpriv->driver &&
1159             gpriv->driver->disconnect)
1160                 gpriv->driver->disconnect(&gpriv->gadget);
1161
1162         dev_dbg(dev, "stop gadget\n");
1163
1164         return 0;
1165
1166 usbhsg_try_stop_unlock:
1167         usbhsg_unlock(lock, &flags);
1168
1169         return 0;
1170 }
1171
1172 /*
1173  *
1174  *              linux usb function
1175  *
1176  */
1177 struct usbhsg_gpriv *the_controller;
1178 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1179                             int (*bind)(struct usb_gadget *))
1180 {
1181         struct usbhsg_gpriv *gpriv = the_controller;
1182         struct usbhs_priv *priv;
1183         struct device *dev;
1184         int ret;
1185
1186         if (!bind               ||
1187             !driver             ||
1188             !driver->setup      ||
1189             driver->speed != USB_SPEED_HIGH)
1190                 return -EINVAL;
1191         if (!gpriv)
1192                 return -ENODEV;
1193         if (gpriv->driver)
1194                 return -EBUSY;
1195
1196         dev  = usbhsg_gpriv_to_dev(gpriv);
1197         priv = usbhsg_gpriv_to_priv(gpriv);
1198
1199         /* first hook up the driver ... */
1200         gpriv->driver = driver;
1201         gpriv->gadget.dev.driver = &driver->driver;
1202
1203         ret = device_add(&gpriv->gadget.dev);
1204         if (ret) {
1205                 dev_err(dev, "device_add error %d\n", ret);
1206                 goto add_fail;
1207         }
1208
1209         ret = bind(&gpriv->gadget);
1210         if (ret) {
1211                 dev_err(dev, "bind to driver %s error %d\n",
1212                         driver->driver.name, ret);
1213                 goto bind_fail;
1214         }
1215
1216         dev_dbg(dev, "bind %s\n", driver->driver.name);
1217
1218         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
1219
1220 bind_fail:
1221         device_del(&gpriv->gadget.dev);
1222 add_fail:
1223         gpriv->driver = NULL;
1224         gpriv->gadget.dev.driver = NULL;
1225
1226         return ret;
1227 }
1228 EXPORT_SYMBOL(usb_gadget_probe_driver);
1229
1230 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1231 {
1232         struct usbhsg_gpriv *gpriv = the_controller;
1233         struct usbhs_priv *priv;
1234         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1235
1236         if (!gpriv)
1237                 return -ENODEV;
1238
1239         if (!driver             ||
1240             !driver->unbind     ||
1241             driver != gpriv->driver)
1242                 return -EINVAL;
1243
1244         dev  = usbhsg_gpriv_to_dev(gpriv);
1245         priv = usbhsg_gpriv_to_priv(gpriv);
1246
1247         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
1248         device_del(&gpriv->gadget.dev);
1249         gpriv->driver = NULL;
1250
1251         if (driver->disconnect)
1252                 driver->disconnect(&gpriv->gadget);
1253
1254         driver->unbind(&gpriv->gadget);
1255         dev_dbg(dev, "unbind %s\n", driver->driver.name);
1256
1257         return 0;
1258 }
1259 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1260
1261 /*
1262  *              usb gadget ops
1263  */
1264 static int usbhsg_get_frame(struct usb_gadget *gadget)
1265 {
1266         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1267         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1268
1269         return usbhs_frame_get_num(priv);
1270 }
1271
1272 static struct usb_gadget_ops usbhsg_gadget_ops = {
1273         .get_frame              = usbhsg_get_frame,
1274 };
1275
1276 static int usbhsg_start(struct usbhs_priv *priv)
1277 {
1278         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1279 }
1280
1281 static int usbhsg_stop(struct usbhs_priv *priv)
1282 {
1283         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1284 }
1285
1286 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1287 {
1288         struct usbhsg_gpriv *gpriv;
1289         struct usbhsg_uep *uep;
1290         struct device *dev = usbhs_priv_to_dev(priv);
1291         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1292         int i;
1293
1294         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1295         if (!gpriv) {
1296                 dev_err(dev, "Could not allocate gadget priv\n");
1297                 return -ENOMEM;
1298         }
1299
1300         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1301         if (!uep) {
1302                 dev_err(dev, "Could not allocate ep\n");
1303                 goto usbhs_mod_gadget_probe_err_gpriv;
1304         }
1305
1306         /*
1307          * CAUTION
1308          *
1309          * There is no guarantee that it is possible to access usb module here.
1310          * Don't accesses to it.
1311          * The accesse will be enable after "usbhsg_start"
1312          */
1313
1314         /*
1315          * register itself
1316          */
1317         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1318
1319         /* init gpriv */
1320         gpriv->mod.name         = "gadget";
1321         gpriv->mod.start        = usbhsg_start;
1322         gpriv->mod.stop         = usbhsg_stop;
1323         gpriv->uep              = uep;
1324         gpriv->uep_size         = pipe_size;
1325         usbhsg_status_init(gpriv);
1326
1327         /*
1328          * init gadget
1329          */
1330         device_initialize(&gpriv->gadget.dev);
1331         dev_set_name(&gpriv->gadget.dev, "gadget");
1332         gpriv->gadget.dev.parent        = dev;
1333         gpriv->gadget.name              = "renesas_usbhs_udc";
1334         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1335         gpriv->gadget.is_dualspeed      = 1;
1336
1337         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1338
1339         /*
1340          * init usb_ep
1341          */
1342         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1343                 uep->gpriv      = gpriv;
1344                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1345
1346                 uep->ep.name            = uep->ep_name;
1347                 uep->ep.ops             = &usbhsg_ep_ops;
1348                 INIT_LIST_HEAD(&uep->ep.ep_list);
1349                 INIT_LIST_HEAD(&uep->list);
1350
1351                 /* init DCP */
1352                 if (usbhsg_is_dcp(uep)) {
1353                         gpriv->gadget.ep0 = &uep->ep;
1354                         uep->ep.maxpacket = 64;
1355                 }
1356                 /* init normal pipe */
1357                 else {
1358                         uep->ep.maxpacket = 512;
1359                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1360                 }
1361         }
1362
1363         the_controller = gpriv;
1364
1365         dev_info(dev, "gadget probed\n");
1366
1367         return 0;
1368
1369 usbhs_mod_gadget_probe_err_gpriv:
1370         kfree(gpriv);
1371
1372         return -ENOMEM;
1373 }
1374
1375 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1376 {
1377         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1378
1379         kfree(gpriv);
1380 }