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