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/dma-mapping.h>
  18 #include <linux/io.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/usb/ch9.h>
  22 #include <linux/usb/gadget.h>
  23 #include "common.h"
  24
  25 /*
  26  *              struct
  27  */
  28 struct usbhsg_request {
  29         struct usb_request      req;
  30         struct usbhs_pkt        pkt;
  31 };
  32
  33 #define EP_NAME_SIZE 8
  34 struct usbhsg_gpriv;
  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 usbhs_pkt_handle *handler;
  43 };
  44
  45 struct usbhsg_gpriv {
  46         struct usb_gadget        gadget;
  47         struct usbhs_mod         mod;
  48         struct list_head         link;
  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_recip_handle {
  62         char *name;
  63         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  64                       struct usb_ctrlrequest *ctrl);
  65         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  66                          struct usb_ctrlrequest *ctrl);
  67         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  68                         struct usb_ctrlrequest *ctrl);
  69 };
  70
  71 /*
  72  *              macro
  73  */
  74 #define usbhsg_priv_to_gpriv(priv)                      \
  75         container_of(                                   \
  76                 usbhs_mod_get(priv, USBHS_GADGET),      \
  77                 struct usbhsg_gpriv, mod)
  78
  79 #define __usbhsg_for_each_uep(start, pos, g, i) \
  80         for (i = start, pos = (g)->uep + i;     \
  81              i < (g)->uep_size;                 \
  82              i++, pos = (g)->uep + i)
  83
  84 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  85         __usbhsg_for_each_uep(1, pos, gpriv, i)
  86
  87 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  88         __usbhsg_for_each_uep(0, pos, gpriv, i)
  89
  90 #define usbhsg_gadget_to_gpriv(g)\
  91         container_of(g, struct usbhsg_gpriv, gadget)
  92
  93 #define usbhsg_req_to_ureq(r)\
  94         container_of(r, struct usbhsg_request, req)
  95
  96 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
  97 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
  98 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
  99 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
 100 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
 101 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 102 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 103 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 104 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 105
 106 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
 107 #define usbhsg_pkt_to_ureq(i)   \
 108         container_of(i, struct usbhsg_request, pkt)
 109
 110 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 111
 112 /* status */
 113 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 114 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 115 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 116 #define usbhsg_status_has(gp, b) (gp->status &   b)
 117
 118 /* controller */
 119 LIST_HEAD(the_controller_link);
 120
 121 #define usbhsg_for_each_controller(gpriv)\
 122         list_for_each_entry(gpriv, &the_controller_link, link)
 123 #define usbhsg_controller_register(gpriv)\
 124         list_add_tail(&(gpriv)->link, &the_controller_link)
 125 #define usbhsg_controller_unregister(gpriv)\
 126         list_del_init(&(gpriv)->link)
 127
 128 /*
 129  *              queue push/pop
 130  */
 131 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 132                               struct usbhsg_request *ureq)
 133 {
 134         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 135         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 136         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 137         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 138         struct usb_request *req = &ureq->req;
 139
 140         req->actual = 0;
 141         req->status = -EINPROGRESS;
 142         usbhs_pkt_push(pipe, pkt, uep->handler,
 143                        req->buf, req->length, req->zero);
 144
 145         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 146                 usbhs_pipe_number(pipe),
 147                 req->length);
 148 }
 149
 150 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 151                              struct usbhsg_request *ureq,
 152                              int status)
 153 {
 154         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 155         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 156         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 157
 158         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 159
 160         ureq->req.status = status;
 161         ureq->req.complete(&uep->ep, &ureq->req);
 162 }
 163
 164 static void usbhsg_queue_done(struct usbhs_pkt *pkt)
 165 {
 166         struct usbhs_pipe *pipe = pkt->pipe;
 167         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 168         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 169
 170         ureq->req.actual = pkt->actual;
 171
 172         usbhsg_queue_pop(uep, ureq, 0);
 173 }
 174
 175 /*
 176  *              dma map/unmap
 177  */
 178 static int usbhsg_dma_map(struct device *dev,
 179                           struct usbhs_pkt *pkt,
 180                           enum dma_data_direction dir)
 181 {
 182         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 183         struct usb_request *req = &ureq->req;
 184
 185         if (pkt->dma != DMA_ADDR_INVALID) {
 186                 dev_err(dev, "dma is already mapped\n");
 187                 return -EIO;
 188         }
 189
 190         if (req->dma == DMA_ADDR_INVALID) {
 191                 pkt->dma = dma_map_single(dev, pkt->buf, pkt->length, dir);
 192         } else {
 193                 dma_sync_single_for_device(dev, req->dma, req->length, dir);
 194                 pkt->dma = req->dma;
 195         }
 196
 197         if (dma_mapping_error(dev, pkt->dma)) {
 198                 dev_err(dev, "dma mapping error %x\n", pkt->dma);
 199                 return -EIO;
 200         }
 201
 202         return 0;
 203 }
 204
 205 static int usbhsg_dma_unmap(struct device *dev,
 206                             struct usbhs_pkt *pkt,
 207                             enum dma_data_direction dir)
 208 {
 209         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 210         struct usb_request *req = &ureq->req;
 211
 212         if (pkt->dma == DMA_ADDR_INVALID) {
 213                 dev_err(dev, "dma is not mapped\n");
 214                 return -EIO;
 215         }
 216
 217         if (req->dma == DMA_ADDR_INVALID)
 218                 dma_unmap_single(dev, pkt->dma, pkt->length, dir);
 219         else
 220                 dma_sync_single_for_cpu(dev, req->dma, req->length, dir);
 221
 222         pkt->dma = DMA_ADDR_INVALID;
 223
 224         return 0;
 225 }
 226
 227 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 228 {
 229         struct usbhs_pipe *pipe = pkt->pipe;
 230         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 231         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 232         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 233         enum dma_data_direction dir;
 234
 235         dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
 236
 237         if (map)
 238                 return usbhsg_dma_map(dev, pkt, dir);
 239         else
 240                 return usbhsg_dma_unmap(dev, pkt, dir);
 241 }
 242
 243 /*
 244  *              USB_TYPE_STANDARD / clear feature functions
 245  */
 246 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 247                                                  struct usbhsg_uep *uep,
 248                                                  struct usb_ctrlrequest *ctrl)
 249 {
 250         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 251         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 252         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 253
 254         usbhs_dcp_control_transfer_done(pipe);
 255
 256         return 0;
 257 }
 258
 259 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 260                                                    struct usbhsg_uep *uep,
 261                                                    struct usb_ctrlrequest *ctrl)
 262 {
 263         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 264         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 265
 266         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 267                 usbhs_pipe_disable(pipe);
 268                 usbhs_pipe_clear_sequence(pipe);
 269                 usbhs_pipe_enable(pipe);
 270         }
 271
 272         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 273
 274         return 0;
 275 }
 276
 277 struct usbhsg_recip_handle req_clear_feature = {
 278         .name           = "clear feature",
 279         .device         = usbhsg_recip_handler_std_control_done,
 280         .interface      = usbhsg_recip_handler_std_control_done,
 281         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 282 };
 283
 284 /*
 285  *              USB_TYPE handler
 286  */
 287 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 288                                    struct usbhsg_recip_handle *handler,
 289                                    struct usb_ctrlrequest *ctrl)
 290 {
 291         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 292         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 293         struct usbhsg_uep *uep;
 294         struct usbhs_pipe *pipe;
 295         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 296         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 297         int ret;
 298         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 299                     struct usb_ctrlrequest *ctrl);
 300         char *msg;
 301
 302         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 303         pipe = usbhsg_uep_to_pipe(uep);
 304         if (!pipe) {
 305                 dev_err(dev, "wrong recip request\n");
 306                 ret = -EINVAL;
 307                 goto usbhsg_recip_run_handle_end;
 308         }
 309
 310         switch (recip) {
 311         case USB_RECIP_DEVICE:
 312                 msg     = "DEVICE";
 313                 func    = handler->device;
 314                 break;
 315         case USB_RECIP_INTERFACE:
 316                 msg     = "INTERFACE";
 317                 func    = handler->interface;
 318                 break;
 319         case USB_RECIP_ENDPOINT:
 320                 msg     = "ENDPOINT";
 321                 func    = handler->endpoint;
 322                 break;
 323         default:
 324                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 325                 func = NULL;
 326                 ret = -EINVAL;
 327         }
 328
 329         if (func) {
 330                 unsigned long flags;
 331
 332                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 333
 334                 /********************  spin lock ********************/
 335                 usbhs_lock(priv, flags);
 336                 ret = func(priv, uep, ctrl);
 337                 usbhs_unlock(priv, flags);
 338                 /********************  spin unlock ******************/
 339         }
 340
 341 usbhsg_recip_run_handle_end:
 342         usbhs_pkt_start(pipe);
 343
 344         return ret;
 345 }
 346
 347 /*
 348  *              irq functions
 349  *
 350  * it will be called from usbhs_interrupt
 351  */
 352 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 353                                 struct usbhs_irq_state *irq_state)
 354 {
 355         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 356         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 357
 358         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
 359
 360         dev_dbg(dev, "state = %x : speed : %d\n",
 361                 usbhs_status_get_device_state(irq_state),
 362                 gpriv->gadget.speed);
 363
 364         return 0;
 365 }
 366
 367 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 368                                  struct usbhs_irq_state *irq_state)
 369 {
 370         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 371         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 372         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 373         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 374         struct usb_ctrlrequest ctrl;
 375         struct usbhsg_recip_handle *recip_handler = NULL;
 376         int stage = usbhs_status_get_ctrl_stage(irq_state);
 377         int ret = 0;
 378
 379         dev_dbg(dev, "stage = %d\n", stage);
 380
 381         /*
 382          * see Manual
 383          *
 384          *  "Operation"
 385          *  - "Interrupt Function"
 386          *    - "Control Transfer Stage Transition Interrupt"
 387          *      - Fig. "Control Transfer Stage Transitions"
 388          */
 389
 390         switch (stage) {
 391         case READ_DATA_STAGE:
 392                 dcp->handler = &usbhs_fifo_pio_push_handler;
 393                 break;
 394         case WRITE_DATA_STAGE:
 395                 dcp->handler = &usbhs_fifo_pio_pop_handler;
 396                 break;
 397         case NODATA_STATUS_STAGE:
 398                 dcp->handler = &usbhs_ctrl_stage_end_handler;
 399                 break;
 400         default:
 401                 return ret;
 402         }
 403
 404         /*
 405          * get usb request
 406          */
 407         usbhs_usbreq_get_val(priv, &ctrl);
 408
 409         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 410         case USB_TYPE_STANDARD:
 411                 switch (ctrl.bRequest) {
 412                 case USB_REQ_CLEAR_FEATURE:
 413                         recip_handler = &req_clear_feature;
 414                         break;
 415                 }
 416         }
 417
 418         /*
 419          * setup stage / run recip
 420          */
 421         if (recip_handler)
 422                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 423         else
 424                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 425
 426         if (ret < 0)
 427                 usbhs_pipe_stall(pipe);
 428
 429         return ret;
 430 }
 431
 432 /*
 433  *
 434  *              usb_dcp_ops
 435  *
 436  */
 437 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 438 {
 439         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 440         struct usbhs_pkt *pkt;
 441
 442         usbhs_pipe_disable(pipe);
 443
 444         while (1) {
 445                 pkt = usbhs_pkt_pop(pipe, NULL);
 446                 if (!pkt)
 447                         break;
 448         }
 449
 450         return 0;
 451 }
 452
 453 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 454 {
 455         int i;
 456         struct usbhsg_uep *uep;
 457
 458         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 459                 uep->pipe = NULL;
 460 }
 461
 462 /*
 463  *
 464  *              usb_ep_ops
 465  *
 466  */
 467 static int usbhsg_ep_enable(struct usb_ep *ep,
 468                          const struct usb_endpoint_descriptor *desc)
 469 {
 470         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 471         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 472         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 473         struct usbhs_pipe *pipe;
 474         int ret = -EIO;
 475
 476         /*
 477          * if it already have pipe,
 478          * nothing to do
 479          */
 480         if (uep->pipe) {
 481                 usbhs_pipe_clear(uep->pipe);
 482                 usbhs_pipe_clear_sequence(uep->pipe);
 483                 return 0;
 484         }
 485
 486         pipe = usbhs_pipe_malloc(priv, desc);
 487         if (pipe) {
 488                 uep->pipe               = pipe;
 489                 pipe->mod_private       = uep;
 490
 491                 /*
 492                  * usbhs_fifo_dma_push/pop_handler try to
 493                  * use dmaengine if possible.
 494                  * It will use pio handler if impossible.
 495                  */
 496                 if (usb_endpoint_dir_in(desc))
 497                         uep->handler = &usbhs_fifo_dma_push_handler;
 498                 else
 499                         uep->handler = &usbhs_fifo_dma_pop_handler;
 500
 501                 ret = 0;
 502         }
 503
 504         return ret;
 505 }
 506
 507 static int usbhsg_ep_disable(struct usb_ep *ep)
 508 {
 509         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 510
 511         return usbhsg_pipe_disable(uep);
 512 }
 513
 514 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 515                                                    gfp_t gfp_flags)
 516 {
 517         struct usbhsg_request *ureq;
 518
 519         ureq = kzalloc(sizeof *ureq, gfp_flags);
 520         if (!ureq)
 521                 return NULL;
 522
 523         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 524
 525         ureq->req.dma = DMA_ADDR_INVALID;
 526
 527         return &ureq->req;
 528 }
 529
 530 static void usbhsg_ep_free_request(struct usb_ep *ep,
 531                                    struct usb_request *req)
 532 {
 533         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 534
 535         WARN_ON(!list_empty(&ureq->pkt.node));
 536         kfree(ureq);
 537 }
 538
 539 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 540                           gfp_t gfp_flags)
 541 {
 542         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 543         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 544         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 545         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 546
 547         /* param check */
 548         if (usbhsg_is_not_connected(gpriv)      ||
 549             unlikely(!gpriv->driver)            ||
 550             unlikely(!pipe))
 551                 return -ESHUTDOWN;
 552
 553         usbhsg_queue_push(uep, ureq);
 554
 555         return 0;
 556 }
 557
 558 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 559 {
 560         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 561         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 562         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 563
 564         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 565         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 566
 567         return 0;
 568 }
 569
 570 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 571 {
 572         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 573         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 574         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 575         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 576         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 577         unsigned long flags;
 578
 579         usbhsg_pipe_disable(uep);
 580
 581         dev_dbg(dev, "set halt %d (pipe %d)\n",
 582                 halt, usbhs_pipe_number(pipe));
 583
 584         /********************  spin lock ********************/
 585         usbhs_lock(priv, flags);
 586
 587         if (halt)
 588                 usbhs_pipe_stall(pipe);
 589         else
 590                 usbhs_pipe_disable(pipe);
 591
 592         if (halt && wedge)
 593                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 594         else
 595                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 596
 597         usbhs_unlock(priv, flags);
 598         /********************  spin unlock ******************/
 599
 600         return 0;
 601 }
 602
 603 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 604 {
 605         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 606 }
 607
 608 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 609 {
 610         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 611 }
 612
 613 static struct usb_ep_ops usbhsg_ep_ops = {
 614         .enable         = usbhsg_ep_enable,
 615         .disable        = usbhsg_ep_disable,
 616
 617         .alloc_request  = usbhsg_ep_alloc_request,
 618         .free_request   = usbhsg_ep_free_request,
 619
 620         .queue          = usbhsg_ep_queue,
 621         .dequeue        = usbhsg_ep_dequeue,
 622
 623         .set_halt       = usbhsg_ep_set_halt,
 624         .set_wedge      = usbhsg_ep_set_wedge,
 625 };
 626
 627 /*
 628  *              usb module start/end
 629  */
 630 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 631 {
 632         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 633         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 634         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 635         struct device *dev = usbhs_priv_to_dev(priv);
 636         unsigned long flags;
 637         int ret = 0;
 638
 639         /********************  spin lock ********************/
 640         usbhs_lock(priv, flags);
 641
 642         usbhsg_status_set(gpriv, status);
 643         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 644               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 645                 ret = -1; /* not ready */
 646
 647         usbhs_unlock(priv, flags);
 648         /********************  spin unlock ********************/
 649
 650         if (ret < 0)
 651                 return 0; /* not ready is not error */
 652
 653         /*
 654          * enable interrupt and systems if ready
 655          */
 656         dev_dbg(dev, "start gadget\n");
 657
 658         /*
 659          * pipe initialize and enable DCP
 660          */
 661         usbhs_pipe_init(priv,
 662                         usbhsg_queue_done,
 663                         usbhsg_dma_map_ctrl);
 664         usbhs_fifo_init(priv);
 665         usbhsg_uep_init(gpriv);
 666
 667         /* dcp init */
 668         dcp->pipe               = usbhs_dcp_malloc(priv);
 669         dcp->pipe->mod_private  = dcp;
 670
 671         /*
 672          * system config enble
 673          * - HI speed
 674          * - function
 675          * - usb module
 676          */
 677         usbhs_sys_hispeed_ctrl(priv, 1);
 678         usbhs_sys_function_ctrl(priv, 1);
 679         usbhs_sys_usb_ctrl(priv, 1);
 680
 681         /*
 682          * enable irq callback
 683          */
 684         mod->irq_dev_state      = usbhsg_irq_dev_state;
 685         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 686         usbhs_irq_callback_update(priv, mod);
 687
 688         return 0;
 689 }
 690
 691 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 692 {
 693         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 694         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 695         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 696         struct device *dev = usbhs_priv_to_dev(priv);
 697         unsigned long flags;
 698         int ret = 0;
 699
 700         /********************  spin lock ********************/
 701         usbhs_lock(priv, flags);
 702
 703         usbhsg_status_clr(gpriv, status);
 704         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 705             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 706                 ret = -1; /* already done */
 707
 708         usbhs_unlock(priv, flags);
 709         /********************  spin unlock ********************/
 710
 711         if (ret < 0)
 712                 return 0; /* already done is not error */
 713
 714         /*
 715          * disable interrupt and systems if 1st try
 716          */
 717         usbhs_fifo_quit(priv);
 718
 719         /* disable all irq */
 720         mod->irq_dev_state      = NULL;
 721         mod->irq_ctrl_stage     = NULL;
 722         usbhs_irq_callback_update(priv, mod);
 723
 724         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 725
 726         /* disable sys */
 727         usbhs_sys_hispeed_ctrl(priv, 0);
 728         usbhs_sys_function_ctrl(priv, 0);
 729         usbhs_sys_usb_ctrl(priv, 0);
 730
 731         usbhsg_pipe_disable(dcp);
 732
 733         if (gpriv->driver &&
 734             gpriv->driver->disconnect)
 735                 gpriv->driver->disconnect(&gpriv->gadget);
 736
 737         dev_dbg(dev, "stop gadget\n");
 738
 739         return 0;
 740 }
 741
 742 /*
 743  *
 744  *              linux usb function
 745  *
 746  */
 747 static int usbhsg_gadget_start(struct usb_gadget_driver *driver,
 748                             int (*bind)(struct usb_gadget *))
 749 {
 750         struct usbhsg_gpriv *gpriv;
 751         struct usbhs_priv *priv;
 752         struct device *dev;
 753         int ret;
 754
 755         if (!bind               ||
 756             !driver             ||
 757             !driver->setup      ||
 758             driver->speed != USB_SPEED_HIGH)
 759                 return -EINVAL;
 760
 761         /*
 762          * find unused controller
 763          */
 764         usbhsg_for_each_controller(gpriv) {
 765                 if (!gpriv->driver)
 766                         goto find_unused_controller;
 767         }
 768         return -ENODEV;
 769
 770 find_unused_controller:
 771
 772         dev  = usbhsg_gpriv_to_dev(gpriv);
 773         priv = usbhsg_gpriv_to_priv(gpriv);
 774
 775         /* first hook up the driver ... */
 776         gpriv->driver = driver;
 777         gpriv->gadget.dev.driver = &driver->driver;
 778
 779         ret = device_add(&gpriv->gadget.dev);
 780         if (ret) {
 781                 dev_err(dev, "device_add error %d\n", ret);
 782                 goto add_fail;
 783         }
 784
 785         ret = bind(&gpriv->gadget);
 786         if (ret) {
 787                 dev_err(dev, "bind to driver %s error %d\n",
 788                         driver->driver.name, ret);
 789                 goto bind_fail;
 790         }
 791
 792         dev_dbg(dev, "bind %s\n", driver->driver.name);
 793
 794         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 795
 796 bind_fail:
 797         device_del(&gpriv->gadget.dev);
 798 add_fail:
 799         gpriv->driver = NULL;
 800         gpriv->gadget.dev.driver = NULL;
 801
 802         return ret;
 803 }
 804
 805 static int usbhsg_gadget_stop(struct usb_gadget_driver *driver)
 806 {
 807         struct usbhsg_gpriv *gpriv;
 808         struct usbhs_priv *priv;
 809         struct device *dev;
 810
 811         if (!driver             ||
 812             !driver->unbind)
 813                 return -EINVAL;
 814
 815         /*
 816          * find controller
 817          */
 818         usbhsg_for_each_controller(gpriv) {
 819                 if (gpriv->driver == driver)
 820                         goto find_matching_controller;
 821         }
 822         return -ENODEV;
 823
 824 find_matching_controller:
 825
 826         dev  = usbhsg_gpriv_to_dev(gpriv);
 827         priv = usbhsg_gpriv_to_priv(gpriv);
 828
 829         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 830         device_del(&gpriv->gadget.dev);
 831         gpriv->driver = NULL;
 832
 833         if (driver->disconnect)
 834                 driver->disconnect(&gpriv->gadget);
 835
 836         driver->unbind(&gpriv->gadget);
 837         dev_dbg(dev, "unbind %s\n", driver->driver.name);
 838
 839         return 0;
 840 }
 841
 842 /*
 843  *              usb gadget ops
 844  */
 845 static int usbhsg_get_frame(struct usb_gadget *gadget)
 846 {
 847         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 848         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 849
 850         return usbhs_frame_get_num(priv);
 851 }
 852
 853 static struct usb_gadget_ops usbhsg_gadget_ops = {
 854         .get_frame              = usbhsg_get_frame,
 855         .start                  = usbhsg_gadget_start,
 856         .stop                   = usbhsg_gadget_stop,
 857 };
 858
 859 static int usbhsg_start(struct usbhs_priv *priv)
 860 {
 861         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
 862 }
 863
 864 static int usbhsg_stop(struct usbhs_priv *priv)
 865 {
 866         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 867 }
 868
 869 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 870 {
 871         struct usbhsg_gpriv *gpriv;
 872         struct usbhsg_uep *uep;
 873         struct device *dev = usbhs_priv_to_dev(priv);
 874         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 875         int i;
 876         int ret;
 877
 878         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
 879         if (!gpriv) {
 880                 dev_err(dev, "Could not allocate gadget priv\n");
 881                 return -ENOMEM;
 882         }
 883
 884         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
 885         if (!uep) {
 886                 dev_err(dev, "Could not allocate ep\n");
 887                 ret = -ENOMEM;
 888                 goto usbhs_mod_gadget_probe_err_gpriv;
 889         }
 890
 891         /*
 892          * CAUTION
 893          *
 894          * There is no guarantee that it is possible to access usb module here.
 895          * Don't accesses to it.
 896          * The accesse will be enable after "usbhsg_start"
 897          */
 898
 899         /*
 900          * register itself
 901          */
 902         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
 903
 904         /* init gpriv */
 905         gpriv->mod.name         = "gadget";
 906         gpriv->mod.start        = usbhsg_start;
 907         gpriv->mod.stop         = usbhsg_stop;
 908         gpriv->uep              = uep;
 909         gpriv->uep_size         = pipe_size;
 910         usbhsg_status_init(gpriv);
 911
 912         /*
 913          * init gadget
 914          */
 915         device_initialize(&gpriv->gadget.dev);
 916         dev_set_name(&gpriv->gadget.dev, "gadget");
 917         gpriv->gadget.dev.parent        = dev;
 918         gpriv->gadget.name              = "renesas_usbhs_udc";
 919         gpriv->gadget.ops               = &usbhsg_gadget_ops;
 920         gpriv->gadget.is_dualspeed      = 1;
 921
 922         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
 923
 924         /*
 925          * init usb_ep
 926          */
 927         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
 928                 uep->gpriv      = gpriv;
 929                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
 930
 931                 uep->ep.name            = uep->ep_name;
 932                 uep->ep.ops             = &usbhsg_ep_ops;
 933                 INIT_LIST_HEAD(&uep->ep.ep_list);
 934
 935                 /* init DCP */
 936                 if (usbhsg_is_dcp(uep)) {
 937                         gpriv->gadget.ep0 = &uep->ep;
 938                         uep->ep.maxpacket = 64;
 939                 }
 940                 /* init normal pipe */
 941                 else {
 942                         uep->ep.maxpacket = 512;
 943                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
 944                 }
 945         }
 946
 947         usbhsg_controller_register(gpriv);
 948
 949         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
 950         if (ret)
 951                 goto err_add_udc;
 952
 953
 954         dev_info(dev, "gadget probed\n");
 955
 956         return 0;
 957 err_add_udc:
 958         kfree(gpriv->uep);
 959
 960 usbhs_mod_gadget_probe_err_gpriv:
 961         kfree(gpriv);
 962
 963         return ret;
 964 }
 965
 966 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 967 {
 968         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 969
 970         usb_del_gadget_udc(&gpriv->gadget);
 971
 972         usbhsg_controller_unregister(gpriv);
 973
 974         kfree(gpriv->uep);
 975         kfree(gpriv);
 976 }