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