drivers/usb/renesas_usbhs/mod_gadget.c

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