drivers/usb/renesas_usbhs/mod_gadget.c

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  15  *
  16  */
  17 #include <linux/io.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/usb/ch9.h>
  21 #include <linux/usb/gadget.h>
  22 #include "common.h"
  23
  24 /*
  25  *              struct
  26  */
  27 struct usbhsg_request {
  28         struct usb_request      req;
  29         struct usbhs_pkt        pkt;
  30 };
  31
  32 #define EP_NAME_SIZE 8
  33 struct usbhsg_gpriv;
  34 struct usbhsg_pipe_handle;
  35 struct usbhsg_uep {
  36         struct usb_ep            ep;
  37         struct usbhs_pipe       *pipe;
  38
  39         char ep_name[EP_NAME_SIZE];
  40
  41         struct usbhsg_gpriv *gpriv;
  42         struct usbhsg_pipe_handle *handler;
  43 };
  44
  45 struct usbhsg_gpriv {
  46         struct usb_gadget        gadget;
  47         struct usbhs_mod         mod;
  48
  49         struct usbhsg_uep       *uep;
  50         int                      uep_size;
  51
  52         struct usb_gadget_driver        *driver;
  53
  54         u32     status;
  55 #define USBHSG_STATUS_STARTED           (1 << 0)
  56 #define USBHSG_STATUS_REGISTERD         (1 << 1)
  57 #define USBHSG_STATUS_WEDGE             (1 << 2)
  58 };
  59
  60 struct usbhsg_pipe_handle {
  61         int (*prepare)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
  62         int (*try_run)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
  63         void (*irq_mask)(struct usbhsg_uep *uep, int enable);
  64 };
  65
  66 struct usbhsg_recip_handle {
  67         char *name;
  68         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  69                       struct usb_ctrlrequest *ctrl);
  70         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  71                          struct usb_ctrlrequest *ctrl);
  72         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  73                         struct usb_ctrlrequest *ctrl);
  74 };
  75
  76 /*
  77  *              macro
  78  */
  79 #define usbhsg_priv_to_gpriv(priv)                      \
  80         container_of(                                   \
  81                 usbhs_mod_get(priv, USBHS_GADGET),      \
  82                 struct usbhsg_gpriv, mod)
  83
  84 #define __usbhsg_for_each_uep(start, pos, g, i) \
  85         for (i = start, pos = (g)->uep;         \
  86              i < (g)->uep_size;                 \
  87              i++, pos = (g)->uep + i)
  88
  89 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  90         __usbhsg_for_each_uep(1, pos, gpriv, i)
  91
  92 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  93         __usbhsg_for_each_uep(0, pos, gpriv, i)
  94
  95 #define usbhsg_gadget_to_gpriv(g)\
  96         container_of(g, struct usbhsg_gpriv, gadget)
  97
  98 #define usbhsg_req_to_ureq(r)\
  99         container_of(r, struct usbhsg_request, req)
 100
 101 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
 102 #define usbhsg_gpriv_to_lock(gp)        usbhs_priv_to_lock((gp)->mod.priv)
 103 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
 104 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
 105 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
 106 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
 107 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 108 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 109 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 110 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 111
 112 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
 113 #define usbhsg_pkt_to_ureq(i)   \
 114         container_of(i, struct usbhsg_request, pkt)
 115
 116 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 117
 118 /* status */
 119 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 120 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 121 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 122 #define usbhsg_status_has(gp, b) (gp->status &   b)
 123
 124 /*
 125  *              usbhsg_trylock
 126  *
 127  * This driver don't use spin_try_lock
 128  * to avoid warning of CONFIG_DEBUG_SPINLOCK
 129  */
 130 static spinlock_t *usbhsg_trylock(struct usbhsg_gpriv *gpriv,
 131                                   unsigned long *flags)
 132 {
 133         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
 134
 135         /* check spin lock status
 136          * to avoid deadlock/nest */
 137         if (spin_is_locked(lock))
 138                 return NULL;
 139
 140         spin_lock_irqsave(lock, *flags);
 141
 142         return lock;
 143 }
 144
 145 static void usbhsg_unlock(spinlock_t *lock, unsigned long *flags)
 146 {
 147         if (!lock)
 148                 return;
 149
 150         spin_unlock_irqrestore(lock, *flags);
 151 }
 152
 153 /*
 154  *              list push/pop
 155  */
 156 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 157                               struct usbhsg_request *ureq)
 158 {
 159         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 160         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 161         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 162         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 163
 164         /*
 165          *********  assume under spin lock  *********
 166          */
 167         usbhs_pkt_push(pipe, pkt);
 168         ureq->req.actual = 0;
 169         ureq->req.status = -EINPROGRESS;
 170
 171         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 172                 usbhs_pipe_number(pipe),
 173                 ureq->req.length);
 174 }
 175
 176 static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep)
 177 {
 178         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 179         struct usbhs_pkt *pkt = usbhs_pkt_get(pipe);
 180
 181         /*
 182          *********  assume under spin lock  *********
 183          */
 184         if (!pkt)
 185                 return 0;
 186
 187         return usbhsg_pkt_to_ureq(pkt);
 188 }
 189
 190 #define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1);
 191 #define usbhsg_queue_handle(uep)  __usbhsg_queue_handler(uep, 0);
 192 static int __usbhsg_queue_handler(struct usbhsg_uep *uep, int prepare)
 193 {
 194         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 195         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 196         struct usbhsg_request *ureq;
 197         spinlock_t *lock;
 198         unsigned long flags;
 199         int ret = 0;
 200
 201         if (!uep->handler) {
 202                 dev_err(dev, "no handler function\n");
 203                 return -EIO;
 204         }
 205
 206         /*
 207          * CAUTION [*queue handler*]
 208          *
 209          * This function will be called for start/restart queue operation.
 210          * OTOH the most much worry for USB driver is spinlock nest.
 211          * Specially it are
 212          *   - usb_ep_ops  :: queue
 213          *   - usb_request :: complete
 214          *
 215          * But the caller of this function need not care about spinlock.
 216          * This function is using usbhsg_trylock for it.
 217          * if "is_locked" is 1, this mean this function lock it.
 218          * but if it is 0, this mean it is already under spin lock.
 219          * see also
 220          *   CAUTION [*endpoint queue*]
 221          *   CAUTION [*request complete*]
 222          */
 223
 224         /******************  spin try lock *******************/
 225         lock = usbhsg_trylock(gpriv, &flags);
 226
 227         ureq = usbhsg_queue_get(uep);
 228         if (ureq) {
 229                 if (prepare)
 230                         ret = uep->handler->prepare(uep, ureq);
 231                 else
 232                         ret = uep->handler->try_run(uep, ureq);
 233         }
 234         usbhsg_unlock(lock, &flags);
 235         /********************  spin unlock ******************/
 236
 237         return ret;
 238 }
 239
 240 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 241                              struct usbhsg_request *ureq,
 242                              int status)
 243 {
 244         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 245         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 246         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 247         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 248
 249         /*
 250          *********  assume under spin lock  *********
 251          */
 252
 253         /*
 254          * CAUTION [*request complete*]
 255          *
 256          * There is a possibility not to be called in correct order
 257          * if "complete" is called without spinlock.
 258          *
 259          * So, this function assume it is under spinlock,
 260          * and call usb_request :: complete.
 261          *
 262          * But this "complete" will push next usb_request.
 263          * It mean "usb_ep_ops :: queue" which is using spinlock is called
 264          * under spinlock.
 265          *
 266          * To avoid dead-lock, this driver is using usbhsg_trylock.
 267          *   CAUTION [*endpoint queue*]
 268          *   CAUTION [*queue handler*]
 269          */
 270
 271         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 272
 273         usbhs_pkt_pop(pkt);
 274
 275         ureq->req.status = status;
 276         ureq->req.complete(&uep->ep, &ureq->req);
 277
 278         /* more request ? */
 279         if (0 == status)
 280                 usbhsg_queue_prepare(uep);
 281 }
 282
 283 /*
 284  *              irq enable/disable function
 285  */
 286 #define usbhsg_irq_callback_ctrl(uep, status, enable)                   \
 287         ({                                                              \
 288                 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);  \
 289                 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);      \
 290                 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);  \
 291                 struct usbhs_mod *mod = usbhs_mod_get_current(priv);    \
 292                 if (!mod)                                               \
 293                         return;                                         \
 294                 if (enable)                                             \
 295                         mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \
 296                 else                                                    \
 297                         mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \
 298                 usbhs_irq_callback_update(priv, mod);                   \
 299         })
 300
 301 static void usbhsg_irq_empty_ctrl(struct usbhsg_uep *uep, int enable)
 302 {
 303         usbhsg_irq_callback_ctrl(uep, bempsts, enable);
 304 }
 305
 306 static void usbhsg_irq_ready_ctrl(struct usbhsg_uep *uep, int enable)
 307 {
 308         usbhsg_irq_callback_ctrl(uep, brdysts, enable);
 309 }
 310
 311 /*
 312  *              handler function
 313  */
 314 static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep *uep,
 315                                          struct usbhsg_request *ureq)
 316 {
 317         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 318
 319         /*
 320          *********  assume under spin lock  *********
 321          */
 322
 323         usbhs_dcp_control_transfer_done(pipe);
 324         usbhsg_queue_pop(uep, ureq, 0);
 325
 326         return 0;
 327 }
 328
 329 /*
 330  *              packet send hander
 331  */
 332 static void usbhsg_try_run_send_packet_bh(struct usbhs_pkt *pkt)
 333 {
 334         struct usbhs_pipe *pipe = pkt->pipe;
 335         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 336         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 337         struct usb_request *req = &ureq->req;
 338         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 339         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 340         int remainder, send, maxp;
 341         int is_done = 0;
 342         int enable;
 343
 344         maxp            = pkt->maxp;
 345         send            = pkt->actual;
 346         remainder       = pkt->length;
 347
 348         /*
 349          * send = 0 : send zero packet
 350          * send > 0 : send data
 351          *
 352          * send <= max_packet
 353          */
 354         req->actual += send;
 355
 356         /* send all packet ? */
 357         if (send < remainder)
 358                 is_done = 0;            /* there are remainder data */
 359         else if (send < maxp)
 360                 is_done = 1;            /* short packet */
 361         else
 362                 is_done = !req->zero;   /* send zero packet ? */
 363
 364         dev_dbg(dev, "  send %d (%d/ %d/ %d/ %d)\n",
 365                 usbhs_pipe_number(pipe),
 366                 remainder, send, is_done, req->zero);
 367
 368         /*
 369          * enable interrupt and send again in irq handler
 370          * if it still have remainder data which should be sent.
 371          */
 372         enable = !is_done;
 373         uep->handler->irq_mask(uep, enable);
 374
 375         /*
 376          * all data were sent ?
 377          */
 378         if (is_done) {
 379                 /* it care below call in
 380                    "function mode" */
 381                 if (usbhsg_is_dcp(uep))
 382                         usbhs_dcp_control_transfer_done(pipe);
 383
 384                 usbhsg_queue_pop(uep, ureq, 0);
 385         }
 386 }
 387
 388 static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
 389                                       struct usbhsg_request *ureq)
 390 {
 391         struct usb_request *req = &ureq->req;
 392         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 393         int ret;
 394
 395         /*
 396          *********  assume under spin lock  *********
 397          */
 398
 399         usbhs_pkt_update(pkt,
 400                          req->buf    + req->actual,
 401                          req->length - req->actual);
 402
 403         ret = usbhs_fifo_write(pkt);
 404         if (ret < 0) {
 405                 /* pipe is busy.
 406                  * retry in interrupt */
 407                 uep->handler->irq_mask(uep, 1);
 408         }
 409
 410         return 0;
 411 }
 412
 413 static int usbhsg_prepare_send_packet(struct usbhsg_uep *uep,
 414                                       struct usbhsg_request *ureq)
 415 {
 416         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 417
 418         /*
 419          *********  assume under spin lock  *********
 420          */
 421
 422         usbhs_fifo_prepare_write(pipe);
 423         usbhsg_try_run_send_packet(uep, ureq);
 424
 425         return 0;
 426 }
 427
 428 /*
 429  *              packet recv hander
 430  */
 431 static void usbhsg_try_run_receive_packet_bh(struct usbhs_pkt *pkt)
 432 {
 433         struct usbhs_pipe *pipe = pkt->pipe;
 434         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 435         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 436         struct usb_request *req = &ureq->req;
 437         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 438         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 439         int remainder, recv, maxp;
 440         int is_done = 0;
 441
 442         maxp            = pkt->maxp;
 443         remainder       = pkt->length;
 444         recv            = pkt->actual;
 445
 446         /*
 447          * recv < 0  : pipe busy
 448          * recv >= 0 : receive data
 449          *
 450          * recv <= max_packet
 451          */
 452
 453         /* update parameters */
 454         req->actual += recv;
 455
 456         if ((recv == remainder) ||      /* receive all data */
 457             (recv < maxp))              /* short packet */
 458                 is_done = 1;
 459
 460         dev_dbg(dev, "  recv %d (%d/ %d/ %d/ %d)\n",
 461                 usbhs_pipe_number(pipe),
 462                 remainder, recv, is_done, req->zero);
 463
 464         /* read all data ? */
 465         if (is_done) {
 466                 int disable = 0;
 467
 468                 uep->handler->irq_mask(uep, disable);
 469                 usbhs_pipe_disable(pipe);
 470                 usbhsg_queue_pop(uep, ureq, 0);
 471         }
 472 }
 473
 474 static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
 475                                          struct usbhsg_request *ureq)
 476 {
 477         struct usb_request *req = &ureq->req;
 478         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 479
 480         /*
 481          *********  assume under spin lock  *********
 482          */
 483
 484         usbhs_pkt_update(pkt,
 485                          req->buf    + req->actual,
 486                          req->length - req->actual);
 487
 488         return usbhs_fifo_read(pkt);
 489 }
 490
 491 static int usbhsg_prepare_receive_packet(struct usbhsg_uep *uep,
 492                                          struct usbhsg_request *ureq)
 493 {
 494         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 495         int enable = 1;
 496         int ret;
 497
 498         /*
 499          *********  assume under spin lock  *********
 500          */
 501
 502         ret = usbhs_fifo_prepare_read(pipe);
 503         if (ret < 0)
 504                 return ret;
 505
 506         /*
 507          * data will be read in interrupt handler
 508          */
 509         uep->handler->irq_mask(uep, enable);
 510
 511         return ret;
 512 }
 513
 514 static struct usbhsg_pipe_handle usbhsg_handler_send_by_empty = {
 515         .prepare        = usbhsg_prepare_send_packet,
 516         .try_run        = usbhsg_try_run_send_packet,
 517         .irq_mask       = usbhsg_irq_empty_ctrl,
 518 };
 519
 520 static struct usbhsg_pipe_handle usbhsg_handler_send_by_ready = {
 521         .prepare        = usbhsg_prepare_send_packet,
 522         .try_run        = usbhsg_try_run_send_packet,
 523         .irq_mask       = usbhsg_irq_ready_ctrl,
 524 };
 525
 526 static struct usbhsg_pipe_handle usbhsg_handler_recv_by_ready = {
 527         .prepare        = usbhsg_prepare_receive_packet,
 528         .try_run        = usbhsg_try_run_receive_packet,
 529         .irq_mask       = usbhsg_irq_ready_ctrl,
 530 };
 531
 532 static struct usbhsg_pipe_handle usbhsg_handler_ctrl_stage_end = {
 533         .prepare        = usbhsg_try_run_ctrl_stage_end,
 534         .try_run        = usbhsg_try_run_ctrl_stage_end,
 535 };
 536
 537 /*
 538  * DCP pipe can NOT use "ready interrupt" for "send"
 539  * it should use "empty" interrupt.
 540  * see
 541  *   "Operation" - "Interrupt Function" - "BRDY Interrupt"
 542  *
 543  * on the other hand, normal pipe can use "ready interrupt" for "send"
 544  * even though it is single/double buffer
 545  */
 546 #define usbhsg_handler_send_ctrl        usbhsg_handler_send_by_empty
 547 #define usbhsg_handler_recv_ctrl        usbhsg_handler_recv_by_ready
 548
 549 #define usbhsg_handler_send_packet      usbhsg_handler_send_by_ready
 550 #define usbhsg_handler_recv_packet      usbhsg_handler_recv_by_ready
 551
 552 /*
 553  *              USB_TYPE_STANDARD / clear feature functions
 554  */
 555 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 556                                                  struct usbhsg_uep *uep,
 557                                                  struct usb_ctrlrequest *ctrl)
 558 {
 559         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 560         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 561         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 562
 563         usbhs_dcp_control_transfer_done(pipe);
 564
 565         return 0;
 566 }
 567
 568 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 569                                                    struct usbhsg_uep *uep,
 570                                                    struct usb_ctrlrequest *ctrl)
 571 {
 572         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 573         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 574
 575         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 576                 usbhs_pipe_disable(pipe);
 577                 usbhs_pipe_clear_sequence(pipe);
 578                 usbhs_pipe_enable(pipe);
 579         }
 580
 581         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 582
 583         usbhsg_queue_prepare(uep);
 584
 585         return 0;
 586 }
 587
 588 struct usbhsg_recip_handle req_clear_feature = {
 589         .name           = "clear feature",
 590         .device         = usbhsg_recip_handler_std_control_done,
 591         .interface      = usbhsg_recip_handler_std_control_done,
 592         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 593 };
 594
 595 /*
 596  *              USB_TYPE handler
 597  */
 598 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 599                                    struct usbhsg_recip_handle *handler,
 600                                    struct usb_ctrlrequest *ctrl)
 601 {
 602         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 603         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 604         struct usbhsg_uep *uep;
 605         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 606         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 607         int ret;
 608         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 609                     struct usb_ctrlrequest *ctrl);
 610         char *msg;
 611
 612         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 613         if (!usbhsg_uep_to_pipe(uep)) {
 614                 dev_err(dev, "wrong recip request\n");
 615                 return -EINVAL;
 616         }
 617
 618         switch (recip) {
 619         case USB_RECIP_DEVICE:
 620                 msg     = "DEVICE";
 621                 func    = handler->device;
 622                 break;
 623         case USB_RECIP_INTERFACE:
 624                 msg     = "INTERFACE";
 625                 func    = handler->interface;
 626                 break;
 627         case USB_RECIP_ENDPOINT:
 628                 msg     = "ENDPOINT";
 629                 func    = handler->endpoint;
 630                 break;
 631         default:
 632                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 633                 func = NULL;
 634                 ret = -EINVAL;
 635         }
 636
 637         if (func) {
 638                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 639                 ret = func(priv, uep, ctrl);
 640         }
 641
 642         return ret;
 643 }
 644
 645 /*
 646  *              irq functions
 647  *
 648  * it will be called from usbhs_interrupt
 649  */
 650 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 651                                 struct usbhs_irq_state *irq_state)
 652 {
 653         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 654         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 655
 656         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
 657
 658         dev_dbg(dev, "state = %x : speed : %d\n",
 659                 usbhs_status_get_device_state(irq_state),
 660                 gpriv->gadget.speed);
 661
 662         return 0;
 663 }
 664
 665 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 666                                  struct usbhs_irq_state *irq_state)
 667 {
 668         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 669         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 670         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 671         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 672         struct usb_ctrlrequest ctrl;
 673         struct usbhsg_recip_handle *recip_handler = NULL;
 674         int stage = usbhs_status_get_ctrl_stage(irq_state);
 675         int ret = 0;
 676
 677         dev_dbg(dev, "stage = %d\n", stage);
 678
 679         /*
 680          * see Manual
 681          *
 682          *  "Operation"
 683          *  - "Interrupt Function"
 684          *    - "Control Transfer Stage Transition Interrupt"
 685          *      - Fig. "Control Transfer Stage Transitions"
 686          */
 687
 688         switch (stage) {
 689         case READ_DATA_STAGE:
 690                 dcp->handler = &usbhsg_handler_send_ctrl;
 691                 break;
 692         case WRITE_DATA_STAGE:
 693                 dcp->handler = &usbhsg_handler_recv_ctrl;
 694                 break;
 695         case NODATA_STATUS_STAGE:
 696                 dcp->handler = &usbhsg_handler_ctrl_stage_end;
 697                 break;
 698         default:
 699                 return ret;
 700         }
 701
 702         /*
 703          * get usb request
 704          */
 705         usbhs_usbreq_get_val(priv, &ctrl);
 706
 707         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 708         case USB_TYPE_STANDARD:
 709                 switch (ctrl.bRequest) {
 710                 case USB_REQ_CLEAR_FEATURE:
 711                         recip_handler = &req_clear_feature;
 712                         break;
 713                 }
 714         }
 715
 716         /*
 717          * setup stage / run recip
 718          */
 719         if (recip_handler)
 720                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 721         else
 722                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 723
 724         if (ret < 0)
 725                 usbhs_pipe_stall(pipe);
 726
 727         return ret;
 728 }
 729
 730 static int usbhsg_irq_empty(struct usbhs_priv *priv,
 731                             struct usbhs_irq_state *irq_state)
 732 {
 733         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 734         struct usbhsg_uep *uep;
 735         struct usbhs_pipe *pipe;
 736         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 737         int i, ret;
 738
 739         if (!irq_state->bempsts) {
 740                 dev_err(dev, "debug %s !!\n", __func__);
 741                 return -EIO;
 742         }
 743
 744         dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
 745
 746         /*
 747          * search interrupted "pipe"
 748          * not "uep".
 749          */
 750         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 751                 if (!(irq_state->bempsts & (1 << i)))
 752                         continue;
 753
 754                 uep     = usbhsg_pipe_to_uep(pipe);
 755                 ret     = usbhsg_queue_handle(uep);
 756                 if (ret < 0)
 757                         dev_err(dev, "send error %d : %d\n", i, ret);
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int usbhsg_irq_ready(struct usbhs_priv *priv,
 764                             struct usbhs_irq_state *irq_state)
 765 {
 766         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 767         struct usbhsg_uep *uep;
 768         struct usbhs_pipe *pipe;
 769         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 770         int i, ret;
 771
 772         if (!irq_state->brdysts) {
 773                 dev_err(dev, "debug %s !!\n", __func__);
 774                 return -EIO;
 775         }
 776
 777         dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
 778
 779         /*
 780          * search interrupted "pipe"
 781          * not "uep".
 782          */
 783         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 784                 if (!(irq_state->brdysts & (1 << i)))
 785                         continue;
 786
 787                 uep     = usbhsg_pipe_to_uep(pipe);
 788                 ret     = usbhsg_queue_handle(uep);
 789                 if (ret < 0)
 790                         dev_err(dev, "receive error %d : %d\n", i, ret);
 791         }
 792
 793         return 0;
 794 }
 795
 796 /*
 797  *
 798  *              usb_dcp_ops
 799  *
 800  */
 801 static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
 802 {
 803         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 804         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 805         struct usbhs_pipe *pipe;
 806
 807         /*
 808          *********  assume under spin lock  *********
 809          */
 810
 811         pipe = usbhs_dcp_malloc(priv);
 812         if (!pipe)
 813                 return -EIO;
 814
 815         uep->pipe               = pipe;
 816         uep->pipe->mod_private  = uep;
 817
 818         return 0;
 819 }
 820
 821 #define usbhsg_dcp_disable usbhsg_pipe_disable
 822 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 823 {
 824         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 825         struct usbhsg_request *ureq;
 826         int disable = 0;
 827
 828         /*
 829          *********  assume under spin lock  *********
 830          */
 831
 832         usbhs_pipe_disable(pipe);
 833
 834         /*
 835          * disable pipe irq
 836          */
 837         usbhsg_irq_empty_ctrl(uep, disable);
 838         usbhsg_irq_ready_ctrl(uep, disable);
 839
 840         while (1) {
 841                 ureq = usbhsg_queue_get(uep);
 842                 if (!ureq)
 843                         break;
 844
 845                 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 846         }
 847
 848         return 0;
 849 }
 850
 851 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 852 {
 853         int i;
 854         struct usbhsg_uep *uep;
 855
 856         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 857                 uep->pipe = NULL;
 858 }
 859
 860 /*
 861  *
 862  *              usb_ep_ops
 863  *
 864  */
 865 static int usbhsg_ep_enable(struct usb_ep *ep,
 866                          const struct usb_endpoint_descriptor *desc)
 867 {
 868         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 869         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 870         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 871         struct usbhs_pipe *pipe;
 872         spinlock_t *lock;
 873         unsigned long flags;
 874         int ret = -EIO;
 875
 876         /*
 877          * if it already have pipe,
 878          * nothing to do
 879          */
 880         if (uep->pipe)
 881                 return 0;
 882
 883         /********************  spin lock ********************/
 884         lock = usbhsg_trylock(gpriv, &flags);
 885
 886         pipe = usbhs_pipe_malloc(priv, desc);
 887         if (pipe) {
 888                 uep->pipe               = pipe;
 889                 pipe->mod_private       = uep;
 890
 891                 if (usb_endpoint_dir_in(desc))
 892                         uep->handler = &usbhsg_handler_send_packet;
 893                 else
 894                         uep->handler = &usbhsg_handler_recv_packet;
 895
 896                 ret = 0;
 897         }
 898
 899         usbhsg_unlock(lock, &flags);
 900         /********************  spin unlock ******************/
 901
 902         return ret;
 903 }
 904
 905 static int usbhsg_ep_disable(struct usb_ep *ep)
 906 {
 907         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 908         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 909         spinlock_t *lock;
 910         unsigned long flags;
 911         int ret;
 912
 913         /********************  spin lock ********************/
 914         lock = usbhsg_trylock(gpriv, &flags);
 915
 916         ret = usbhsg_pipe_disable(uep);
 917
 918         usbhsg_unlock(lock, &flags);
 919         /********************  spin unlock ******************/
 920
 921         return ret;
 922 }
 923
 924 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 925                                                    gfp_t gfp_flags)
 926 {
 927         struct usbhsg_request *ureq;
 928
 929         ureq = kzalloc(sizeof *ureq, gfp_flags);
 930         if (!ureq)
 931                 return NULL;
 932
 933         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 934
 935         return &ureq->req;
 936 }
 937
 938 static void usbhsg_ep_free_request(struct usb_ep *ep,
 939                                    struct usb_request *req)
 940 {
 941         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 942
 943         WARN_ON(!list_empty(&ureq->pkt.node));
 944         kfree(ureq);
 945 }
 946
 947 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 948                           gfp_t gfp_flags)
 949 {
 950         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 951         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 952         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 953         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 954         spinlock_t *lock;
 955         unsigned long flags;
 956         int ret = 0;
 957
 958         /*
 959          * CAUTION [*endpoint queue*]
 960          *
 961          * This function will be called from usb_request :: complete
 962          * or usb driver timing.
 963          * If this function is called from usb_request :: complete,
 964          * it is already under spinlock on this driver.
 965          * but it is called frm usb driver, this function should call spinlock.
 966          *
 967          * This function is using usbshg_trylock to solve this issue.
 968          * if "is_locked" is 1, this mean this function lock it.
 969          * but if it is 0, this mean it is already under spin lock.
 970          * see also
 971          *   CAUTION [*queue handler*]
 972          *   CAUTION [*request complete*]
 973          */
 974
 975         /********************  spin lock ********************/
 976         lock = usbhsg_trylock(gpriv, &flags);
 977
 978         /* param check */
 979         if (usbhsg_is_not_connected(gpriv)      ||
 980             unlikely(!gpriv->driver)            ||
 981             unlikely(!pipe))
 982                 ret = -ESHUTDOWN;
 983         else
 984                 usbhsg_queue_push(uep, ureq);
 985
 986         usbhsg_unlock(lock, &flags);
 987         /********************  spin unlock ******************/
 988
 989         usbhsg_queue_prepare(uep);
 990
 991         return ret;
 992 }
 993
 994 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 995 {
 996         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 997         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 998         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 999         spinlock_t *lock;
1000         unsigned long flags;
1001
1002         /*
1003          * see
1004          *   CAUTION [*queue handler*]
1005          *   CAUTION [*endpoint queue*]
1006          *   CAUTION [*request complete*]
1007          */
1008
1009         /********************  spin lock ********************/
1010         lock = usbhsg_trylock(gpriv, &flags);
1011
1012         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
1013
1014         usbhsg_unlock(lock, &flags);
1015         /********************  spin unlock ******************/
1016
1017         return 0;
1018 }
1019
1020 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
1021 {
1022         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
1023         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
1024         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
1025         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1026         spinlock_t *lock;
1027         unsigned long flags;
1028         int ret = -EAGAIN;
1029
1030         /*
1031          * see
1032          *   CAUTION [*queue handler*]
1033          *   CAUTION [*endpoint queue*]
1034          *   CAUTION [*request complete*]
1035          */
1036
1037         /********************  spin lock ********************/
1038         lock = usbhsg_trylock(gpriv, &flags);
1039         if (!usbhsg_queue_get(uep)) {
1040
1041                 dev_dbg(dev, "set halt %d (pipe %d)\n",
1042                         halt, usbhs_pipe_number(pipe));
1043
1044                 if (halt)
1045                         usbhs_pipe_stall(pipe);
1046                 else
1047                         usbhs_pipe_disable(pipe);
1048
1049                 if (halt && wedge)
1050                         usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
1051                 else
1052                         usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
1053
1054                 ret = 0;
1055         }
1056
1057         usbhsg_unlock(lock, &flags);
1058         /********************  spin unlock ******************/
1059
1060         return ret;
1061 }
1062
1063 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
1064 {
1065         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
1066 }
1067
1068 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
1069 {
1070         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
1071 }
1072
1073 static struct usb_ep_ops usbhsg_ep_ops = {
1074         .enable         = usbhsg_ep_enable,
1075         .disable        = usbhsg_ep_disable,
1076
1077         .alloc_request  = usbhsg_ep_alloc_request,
1078         .free_request   = usbhsg_ep_free_request,
1079
1080         .queue          = usbhsg_ep_queue,
1081         .dequeue        = usbhsg_ep_dequeue,
1082
1083         .set_halt       = usbhsg_ep_set_halt,
1084         .set_wedge      = usbhsg_ep_set_wedge,
1085 };
1086
1087 /*
1088  *              usb module start/end
1089  */
1090 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
1091 {
1092         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1093         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1094         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1095         struct device *dev = usbhs_priv_to_dev(priv);
1096         spinlock_t *lock;
1097         unsigned long flags;
1098
1099         /********************  spin lock ********************/
1100         lock = usbhsg_trylock(gpriv, &flags);
1101
1102         /*
1103          * enable interrupt and systems if ready
1104          */
1105         usbhsg_status_set(gpriv, status);
1106         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1107               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
1108                 goto usbhsg_try_start_unlock;
1109
1110         dev_dbg(dev, "start gadget\n");
1111
1112         /*
1113          * pipe initialize and enable DCP
1114          */
1115         usbhs_pipe_init(priv,
1116                         usbhsg_try_run_send_packet_bh,
1117                         usbhsg_try_run_receive_packet_bh);
1118         usbhsg_uep_init(gpriv);
1119         usbhsg_dcp_enable(dcp);
1120
1121         /*
1122          * system config enble
1123          * - HI speed
1124          * - function
1125          * - usb module
1126          */
1127         usbhs_sys_hispeed_ctrl(priv, 1);
1128         usbhs_sys_function_ctrl(priv, 1);
1129         usbhs_sys_usb_ctrl(priv, 1);
1130
1131         /*
1132          * enable irq callback
1133          */
1134         mod->irq_dev_state      = usbhsg_irq_dev_state;
1135         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
1136         mod->irq_empty          = usbhsg_irq_empty;
1137         mod->irq_ready          = usbhsg_irq_ready;
1138         mod->irq_bempsts        = 0;
1139         mod->irq_brdysts        = 0;
1140         usbhs_irq_callback_update(priv, mod);
1141
1142 usbhsg_try_start_unlock:
1143         usbhsg_unlock(lock, &flags);
1144         /********************  spin unlock ********************/
1145
1146         return 0;
1147 }
1148
1149 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
1150 {
1151         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1152         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1153         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1154         struct device *dev = usbhs_priv_to_dev(priv);
1155         spinlock_t *lock;
1156         unsigned long flags;
1157
1158         /********************  spin lock ********************/
1159         lock = usbhsg_trylock(gpriv, &flags);
1160
1161         /*
1162          * disable interrupt and systems if 1st try
1163          */
1164         usbhsg_status_clr(gpriv, status);
1165         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1166             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
1167                 goto usbhsg_try_stop_unlock;
1168
1169         /* disable all irq */
1170         mod->irq_dev_state      = NULL;
1171         mod->irq_ctrl_stage     = NULL;
1172         mod->irq_empty          = NULL;
1173         mod->irq_ready          = NULL;
1174         mod->irq_bempsts        = 0;
1175         mod->irq_brdysts        = 0;
1176         usbhs_irq_callback_update(priv, mod);
1177
1178         usbhsg_dcp_disable(dcp);
1179
1180         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
1181
1182         /* disable sys */
1183         usbhs_sys_hispeed_ctrl(priv, 0);
1184         usbhs_sys_function_ctrl(priv, 0);
1185         usbhs_sys_usb_ctrl(priv, 0);
1186
1187         usbhsg_unlock(lock, &flags);
1188         /********************  spin unlock ********************/
1189
1190         if (gpriv->driver &&
1191             gpriv->driver->disconnect)
1192                 gpriv->driver->disconnect(&gpriv->gadget);
1193
1194         dev_dbg(dev, "stop gadget\n");
1195
1196         return 0;
1197
1198 usbhsg_try_stop_unlock:
1199         usbhsg_unlock(lock, &flags);
1200
1201         return 0;
1202 }
1203
1204 /*
1205  *
1206  *              linux usb function
1207  *
1208  */
1209 struct usbhsg_gpriv *the_controller;
1210 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1211                             int (*bind)(struct usb_gadget *))
1212 {
1213         struct usbhsg_gpriv *gpriv = the_controller;
1214         struct usbhs_priv *priv;
1215         struct device *dev;
1216         int ret;
1217
1218         if (!bind               ||
1219             !driver             ||
1220             !driver->setup      ||
1221             driver->speed != USB_SPEED_HIGH)
1222                 return -EINVAL;
1223         if (!gpriv)
1224                 return -ENODEV;
1225         if (gpriv->driver)
1226                 return -EBUSY;
1227
1228         dev  = usbhsg_gpriv_to_dev(gpriv);
1229         priv = usbhsg_gpriv_to_priv(gpriv);
1230
1231         /* first hook up the driver ... */
1232         gpriv->driver = driver;
1233         gpriv->gadget.dev.driver = &driver->driver;
1234
1235         ret = device_add(&gpriv->gadget.dev);
1236         if (ret) {
1237                 dev_err(dev, "device_add error %d\n", ret);
1238                 goto add_fail;
1239         }
1240
1241         ret = bind(&gpriv->gadget);
1242         if (ret) {
1243                 dev_err(dev, "bind to driver %s error %d\n",
1244                         driver->driver.name, ret);
1245                 goto bind_fail;
1246         }
1247
1248         dev_dbg(dev, "bind %s\n", driver->driver.name);
1249
1250         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
1251
1252 bind_fail:
1253         device_del(&gpriv->gadget.dev);
1254 add_fail:
1255         gpriv->driver = NULL;
1256         gpriv->gadget.dev.driver = NULL;
1257
1258         return ret;
1259 }
1260 EXPORT_SYMBOL(usb_gadget_probe_driver);
1261
1262 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1263 {
1264         struct usbhsg_gpriv *gpriv = the_controller;
1265         struct usbhs_priv *priv;
1266         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1267
1268         if (!gpriv)
1269                 return -ENODEV;
1270
1271         if (!driver             ||
1272             !driver->unbind     ||
1273             driver != gpriv->driver)
1274                 return -EINVAL;
1275
1276         dev  = usbhsg_gpriv_to_dev(gpriv);
1277         priv = usbhsg_gpriv_to_priv(gpriv);
1278
1279         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
1280         device_del(&gpriv->gadget.dev);
1281         gpriv->driver = NULL;
1282
1283         if (driver->disconnect)
1284                 driver->disconnect(&gpriv->gadget);
1285
1286         driver->unbind(&gpriv->gadget);
1287         dev_dbg(dev, "unbind %s\n", driver->driver.name);
1288
1289         return 0;
1290 }
1291 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1292
1293 /*
1294  *              usb gadget ops
1295  */
1296 static int usbhsg_get_frame(struct usb_gadget *gadget)
1297 {
1298         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1299         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1300
1301         return usbhs_frame_get_num(priv);
1302 }
1303
1304 static struct usb_gadget_ops usbhsg_gadget_ops = {
1305         .get_frame              = usbhsg_get_frame,
1306 };
1307
1308 static int usbhsg_start(struct usbhs_priv *priv)
1309 {
1310         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1311 }
1312
1313 static int usbhsg_stop(struct usbhs_priv *priv)
1314 {
1315         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1316 }
1317
1318 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1319 {
1320         struct usbhsg_gpriv *gpriv;
1321         struct usbhsg_uep *uep;
1322         struct device *dev = usbhs_priv_to_dev(priv);
1323         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1324         int i;
1325
1326         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1327         if (!gpriv) {
1328                 dev_err(dev, "Could not allocate gadget priv\n");
1329                 return -ENOMEM;
1330         }
1331
1332         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1333         if (!uep) {
1334                 dev_err(dev, "Could not allocate ep\n");
1335                 goto usbhs_mod_gadget_probe_err_gpriv;
1336         }
1337
1338         /*
1339          * CAUTION
1340          *
1341          * There is no guarantee that it is possible to access usb module here.
1342          * Don't accesses to it.
1343          * The accesse will be enable after "usbhsg_start"
1344          */
1345
1346         /*
1347          * register itself
1348          */
1349         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1350
1351         /* init gpriv */
1352         gpriv->mod.name         = "gadget";
1353         gpriv->mod.start        = usbhsg_start;
1354         gpriv->mod.stop         = usbhsg_stop;
1355         gpriv->uep              = uep;
1356         gpriv->uep_size         = pipe_size;
1357         usbhsg_status_init(gpriv);
1358
1359         /*
1360          * init gadget
1361          */
1362         device_initialize(&gpriv->gadget.dev);
1363         dev_set_name(&gpriv->gadget.dev, "gadget");
1364         gpriv->gadget.dev.parent        = dev;
1365         gpriv->gadget.name              = "renesas_usbhs_udc";
1366         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1367         gpriv->gadget.is_dualspeed      = 1;
1368
1369         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1370
1371         /*
1372          * init usb_ep
1373          */
1374         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1375                 uep->gpriv      = gpriv;
1376                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1377
1378                 uep->ep.name            = uep->ep_name;
1379                 uep->ep.ops             = &usbhsg_ep_ops;
1380                 INIT_LIST_HEAD(&uep->ep.ep_list);
1381
1382                 /* init DCP */
1383                 if (usbhsg_is_dcp(uep)) {
1384                         gpriv->gadget.ep0 = &uep->ep;
1385                         uep->ep.maxpacket = 64;
1386                 }
1387                 /* init normal pipe */
1388                 else {
1389                         uep->ep.maxpacket = 512;
1390                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1391                 }
1392         }
1393
1394         the_controller = gpriv;
1395
1396         dev_info(dev, "gadget probed\n");
1397
1398         return 0;
1399
1400 usbhs_mod_gadget_probe_err_gpriv:
1401         kfree(gpriv);
1402
1403         return -ENOMEM;
1404 }
1405
1406 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1407 {
1408         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1409
1410         kfree(gpriv);
1411 }