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 };
  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 + i;     \
  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_pop(struct usbhsg_uep *uep,
 131                              struct usbhsg_request *ureq,
 132                              int status)
 133 {
 134         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 135         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 136         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 137
 138         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 139
 140         ureq->req.status = status;
 141         ureq->req.complete(&uep->ep, &ureq->req);
 142 }
 143
 144 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 145 {
 146         struct usbhs_pipe *pipe = pkt->pipe;
 147         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 148         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 149
 150         ureq->req.actual = pkt->actual;
 151
 152         usbhsg_queue_pop(uep, ureq, 0);
 153 }
 154
 155 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 156                               struct usbhsg_request *ureq)
 157 {
 158         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 159         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 160         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 161         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 162         struct usb_request *req = &ureq->req;
 163
 164         req->actual = 0;
 165         req->status = -EINPROGRESS;
 166         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
 167                        req->buf, req->length, req->zero);
 168         usbhs_pkt_start(pipe);
 169
 170         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 171                 usbhs_pipe_number(pipe),
 172                 req->length);
 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_sequence_data0(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_bus_get_speed(priv);
 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                 pipe->handler = &usbhs_fifo_pio_push_handler;
 393                 break;
 394         case WRITE_DATA_STAGE:
 395                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 396                 break;
 397         case NODATA_STATUS_STAGE:
 398                 pipe->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         unsigned long flags;
 476
 477         usbhs_lock(priv, flags);
 478
 479         /*
 480          * if it already have pipe,
 481          * nothing to do
 482          */
 483         if (uep->pipe) {
 484                 usbhs_pipe_clear(uep->pipe);
 485                 usbhs_pipe_sequence_data0(uep->pipe);
 486                 ret = 0;
 487                 goto usbhsg_ep_enable_end;
 488         }
 489
 490         pipe = usbhs_pipe_malloc(priv,
 491                                  usb_endpoint_type(desc),
 492                                  usb_endpoint_dir_in(desc));
 493         if (pipe) {
 494                 uep->pipe               = pipe;
 495                 pipe->mod_private       = uep;
 496
 497                 /* set epnum / maxp */
 498                 usbhs_pipe_config_update(pipe, 0,
 499                                          usb_endpoint_num(desc),
 500                                          usb_endpoint_maxp(desc));
 501
 502                 /*
 503                  * usbhs_fifo_dma_push/pop_handler try to
 504                  * use dmaengine if possible.
 505                  * It will use pio handler if impossible.
 506                  */
 507                 if (usb_endpoint_dir_in(desc))
 508                         pipe->handler = &usbhs_fifo_dma_push_handler;
 509                 else
 510                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 511
 512                 ret = 0;
 513         }
 514
 515 usbhsg_ep_enable_end:
 516         usbhs_unlock(priv, flags);
 517
 518         return ret;
 519 }
 520
 521 static int usbhsg_ep_disable(struct usb_ep *ep)
 522 {
 523         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 524         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 525
 526         if (!pipe)
 527                 return -EINVAL;
 528
 529         return usbhsg_pipe_disable(uep);
 530 }
 531
 532 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 533                                                    gfp_t gfp_flags)
 534 {
 535         struct usbhsg_request *ureq;
 536
 537         ureq = kzalloc(sizeof *ureq, gfp_flags);
 538         if (!ureq)
 539                 return NULL;
 540
 541         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 542
 543         ureq->req.dma = DMA_ADDR_INVALID;
 544
 545         return &ureq->req;
 546 }
 547
 548 static void usbhsg_ep_free_request(struct usb_ep *ep,
 549                                    struct usb_request *req)
 550 {
 551         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 552
 553         WARN_ON(!list_empty(&ureq->pkt.node));
 554         kfree(ureq);
 555 }
 556
 557 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 558                           gfp_t gfp_flags)
 559 {
 560         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 561         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 562         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 563         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 564
 565         /* param check */
 566         if (usbhsg_is_not_connected(gpriv)      ||
 567             unlikely(!gpriv->driver)            ||
 568             unlikely(!pipe))
 569                 return -ESHUTDOWN;
 570
 571         usbhsg_queue_push(uep, ureq);
 572
 573         return 0;
 574 }
 575
 576 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 577 {
 578         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 579         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 580         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 581
 582         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 583         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 584
 585         return 0;
 586 }
 587
 588 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 589 {
 590         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 591         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 592         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 593         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 594         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 595         unsigned long flags;
 596
 597         usbhsg_pipe_disable(uep);
 598
 599         dev_dbg(dev, "set halt %d (pipe %d)\n",
 600                 halt, usbhs_pipe_number(pipe));
 601
 602         /********************  spin lock ********************/
 603         usbhs_lock(priv, flags);
 604
 605         if (halt)
 606                 usbhs_pipe_stall(pipe);
 607         else
 608                 usbhs_pipe_disable(pipe);
 609
 610         if (halt && wedge)
 611                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 612         else
 613                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 614
 615         usbhs_unlock(priv, flags);
 616         /********************  spin unlock ******************/
 617
 618         return 0;
 619 }
 620
 621 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 622 {
 623         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 624 }
 625
 626 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 627 {
 628         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 629 }
 630
 631 static struct usb_ep_ops usbhsg_ep_ops = {
 632         .enable         = usbhsg_ep_enable,
 633         .disable        = usbhsg_ep_disable,
 634
 635         .alloc_request  = usbhsg_ep_alloc_request,
 636         .free_request   = usbhsg_ep_free_request,
 637
 638         .queue          = usbhsg_ep_queue,
 639         .dequeue        = usbhsg_ep_dequeue,
 640
 641         .set_halt       = usbhsg_ep_set_halt,
 642         .set_wedge      = usbhsg_ep_set_wedge,
 643 };
 644
 645 /*
 646  *              usb module start/end
 647  */
 648 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 649 {
 650         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 651         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 652         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 653         struct device *dev = usbhs_priv_to_dev(priv);
 654         unsigned long flags;
 655         int ret = 0;
 656
 657         /********************  spin lock ********************/
 658         usbhs_lock(priv, flags);
 659
 660         usbhsg_status_set(gpriv, status);
 661         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 662               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 663                 ret = -1; /* not ready */
 664
 665         usbhs_unlock(priv, flags);
 666         /********************  spin unlock ********************/
 667
 668         if (ret < 0)
 669                 return 0; /* not ready is not error */
 670
 671         /*
 672          * enable interrupt and systems if ready
 673          */
 674         dev_dbg(dev, "start gadget\n");
 675
 676         /*
 677          * pipe initialize and enable DCP
 678          */
 679         usbhs_pipe_init(priv,
 680                         usbhsg_dma_map_ctrl);
 681         usbhs_fifo_init(priv);
 682         usbhsg_uep_init(gpriv);
 683
 684         /* dcp init */
 685         dcp->pipe               = usbhs_dcp_malloc(priv);
 686         dcp->pipe->mod_private  = dcp;
 687         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 688
 689         /*
 690          * system config enble
 691          * - HI speed
 692          * - function
 693          * - usb module
 694          */
 695         usbhs_sys_hispeed_ctrl(priv, 1);
 696         usbhs_sys_function_ctrl(priv, 1);
 697         usbhs_sys_usb_ctrl(priv, 1);
 698
 699         /*
 700          * enable irq callback
 701          */
 702         mod->irq_dev_state      = usbhsg_irq_dev_state;
 703         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 704         usbhs_irq_callback_update(priv, mod);
 705
 706         return 0;
 707 }
 708
 709 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 710 {
 711         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 712         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 713         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 714         struct device *dev = usbhs_priv_to_dev(priv);
 715         unsigned long flags;
 716         int ret = 0;
 717
 718         /********************  spin lock ********************/
 719         usbhs_lock(priv, flags);
 720
 721         usbhsg_status_clr(gpriv, status);
 722         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 723             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 724                 ret = -1; /* already done */
 725
 726         usbhs_unlock(priv, flags);
 727         /********************  spin unlock ********************/
 728
 729         if (ret < 0)
 730                 return 0; /* already done is not error */
 731
 732         /*
 733          * disable interrupt and systems if 1st try
 734          */
 735         usbhs_fifo_quit(priv);
 736
 737         /* disable all irq */
 738         mod->irq_dev_state      = NULL;
 739         mod->irq_ctrl_stage     = NULL;
 740         usbhs_irq_callback_update(priv, mod);
 741
 742         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 743
 744         /* disable sys */
 745         usbhs_sys_hispeed_ctrl(priv, 0);
 746         usbhs_sys_function_ctrl(priv, 0);
 747         usbhs_sys_usb_ctrl(priv, 0);
 748
 749         usbhsg_pipe_disable(dcp);
 750
 751         dev_dbg(dev, "stop gadget\n");
 752
 753         return 0;
 754 }
 755
 756 /*
 757  *
 758  *              linux usb function
 759  *
 760  */
 761 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 762                 struct usb_gadget_driver *driver)
 763 {
 764         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 765         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 766
 767         if (!driver             ||
 768             !driver->setup      ||
 769             driver->speed < USB_SPEED_FULL)
 770                 return -EINVAL;
 771
 772         /* first hook up the driver ... */
 773         gpriv->driver = driver;
 774         gpriv->gadget.dev.driver = &driver->driver;
 775
 776         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 777 }
 778
 779 static int usbhsg_gadget_stop(struct usb_gadget *gadget,
 780                 struct usb_gadget_driver *driver)
 781 {
 782         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 783         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 784
 785         if (!driver             ||
 786             !driver->unbind)
 787                 return -EINVAL;
 788
 789         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 790         gpriv->gadget.dev.driver = NULL;
 791         gpriv->driver = NULL;
 792
 793         return 0;
 794 }
 795
 796 /*
 797  *              usb gadget ops
 798  */
 799 static int usbhsg_get_frame(struct usb_gadget *gadget)
 800 {
 801         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 802         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 803
 804         return usbhs_frame_get_num(priv);
 805 }
 806
 807 static struct usb_gadget_ops usbhsg_gadget_ops = {
 808         .get_frame              = usbhsg_get_frame,
 809         .udc_start              = usbhsg_gadget_start,
 810         .udc_stop               = usbhsg_gadget_stop,
 811 };
 812
 813 static int usbhsg_start(struct usbhs_priv *priv)
 814 {
 815         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
 816 }
 817
 818 static int usbhsg_stop(struct usbhs_priv *priv)
 819 {
 820         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 821
 822         /* cable disconnect */
 823         if (gpriv->driver &&
 824             gpriv->driver->disconnect)
 825                 gpriv->driver->disconnect(&gpriv->gadget);
 826
 827         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 828 }
 829
 830 static void usbhs_mod_gadget_release(struct device *pdev)
 831 {
 832         /* do nothing */
 833 }
 834
 835 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 836 {
 837         struct usbhsg_gpriv *gpriv;
 838         struct usbhsg_uep *uep;
 839         struct device *dev = usbhs_priv_to_dev(priv);
 840         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 841         int i;
 842         int ret;
 843
 844         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
 845         if (!gpriv) {
 846                 dev_err(dev, "Could not allocate gadget priv\n");
 847                 return -ENOMEM;
 848         }
 849
 850         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
 851         if (!uep) {
 852                 dev_err(dev, "Could not allocate ep\n");
 853                 ret = -ENOMEM;
 854                 goto usbhs_mod_gadget_probe_err_gpriv;
 855         }
 856
 857         /*
 858          * CAUTION
 859          *
 860          * There is no guarantee that it is possible to access usb module here.
 861          * Don't accesses to it.
 862          * The accesse will be enable after "usbhsg_start"
 863          */
 864
 865         /*
 866          * register itself
 867          */
 868         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
 869
 870         /* init gpriv */
 871         gpriv->mod.name         = "gadget";
 872         gpriv->mod.start        = usbhsg_start;
 873         gpriv->mod.stop         = usbhsg_stop;
 874         gpriv->uep              = uep;
 875         gpriv->uep_size         = pipe_size;
 876         usbhsg_status_init(gpriv);
 877
 878         /*
 879          * init gadget
 880          */
 881         dev_set_name(&gpriv->gadget.dev, "gadget");
 882         gpriv->gadget.dev.parent        = dev;
 883         gpriv->gadget.dev.release       = usbhs_mod_gadget_release;
 884         gpriv->gadget.name              = "renesas_usbhs_udc";
 885         gpriv->gadget.ops               = &usbhsg_gadget_ops;
 886         gpriv->gadget.is_dualspeed      = 1;
 887         ret = device_register(&gpriv->gadget.dev);
 888         if (ret < 0)
 889                 goto err_add_udc;
 890
 891         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
 892
 893         /*
 894          * init usb_ep
 895          */
 896         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
 897                 uep->gpriv      = gpriv;
 898                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
 899
 900                 uep->ep.name            = uep->ep_name;
 901                 uep->ep.ops             = &usbhsg_ep_ops;
 902                 INIT_LIST_HEAD(&uep->ep.ep_list);
 903
 904                 /* init DCP */
 905                 if (usbhsg_is_dcp(uep)) {
 906                         gpriv->gadget.ep0 = &uep->ep;
 907                         uep->ep.maxpacket = 64;
 908                 }
 909                 /* init normal pipe */
 910                 else {
 911                         uep->ep.maxpacket = 512;
 912                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
 913                 }
 914         }
 915
 916         usbhsg_controller_register(gpriv);
 917
 918         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
 919         if (ret)
 920                 goto err_register;
 921
 922
 923         dev_info(dev, "gadget probed\n");
 924
 925         return 0;
 926
 927 err_register:
 928         device_unregister(&gpriv->gadget.dev);
 929 err_add_udc:
 930         kfree(gpriv->uep);
 931
 932 usbhs_mod_gadget_probe_err_gpriv:
 933         kfree(gpriv);
 934
 935         return ret;
 936 }
 937
 938 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 939 {
 940         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 941
 942         usb_del_gadget_udc(&gpriv->gadget);
 943
 944         device_unregister(&gpriv->gadget.dev);
 945
 946         usbhsg_controller_unregister(gpriv);
 947
 948         kfree(gpriv->uep);
 949         kfree(gpriv);
 950 }