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                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 331                 ret = func(priv, uep, ctrl);
 332         }
 333
 334 usbhsg_recip_run_handle_end:
 335         usbhs_pkt_start(pipe);
 336
 337         return ret;
 338 }
 339
 340 /*
 341  *              irq functions
 342  *
 343  * it will be called from usbhs_interrupt
 344  */
 345 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 346                                 struct usbhs_irq_state *irq_state)
 347 {
 348         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 349         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 350
 351         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
 352
 353         dev_dbg(dev, "state = %x : speed : %d\n",
 354                 usbhs_status_get_device_state(irq_state),
 355                 gpriv->gadget.speed);
 356
 357         return 0;
 358 }
 359
 360 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 361                                  struct usbhs_irq_state *irq_state)
 362 {
 363         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 364         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 365         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 366         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 367         struct usb_ctrlrequest ctrl;
 368         struct usbhsg_recip_handle *recip_handler = NULL;
 369         int stage = usbhs_status_get_ctrl_stage(irq_state);
 370         int ret = 0;
 371
 372         dev_dbg(dev, "stage = %d\n", stage);
 373
 374         /*
 375          * see Manual
 376          *
 377          *  "Operation"
 378          *  - "Interrupt Function"
 379          *    - "Control Transfer Stage Transition Interrupt"
 380          *      - Fig. "Control Transfer Stage Transitions"
 381          */
 382
 383         switch (stage) {
 384         case READ_DATA_STAGE:
 385                 pipe->handler = &usbhs_fifo_pio_push_handler;
 386                 break;
 387         case WRITE_DATA_STAGE:
 388                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 389                 break;
 390         case NODATA_STATUS_STAGE:
 391                 pipe->handler = &usbhs_ctrl_stage_end_handler;
 392                 break;
 393         default:
 394                 return ret;
 395         }
 396
 397         /*
 398          * get usb request
 399          */
 400         usbhs_usbreq_get_val(priv, &ctrl);
 401
 402         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 403         case USB_TYPE_STANDARD:
 404                 switch (ctrl.bRequest) {
 405                 case USB_REQ_CLEAR_FEATURE:
 406                         recip_handler = &req_clear_feature;
 407                         break;
 408                 }
 409         }
 410
 411         /*
 412          * setup stage / run recip
 413          */
 414         if (recip_handler)
 415                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 416         else
 417                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 418
 419         if (ret < 0)
 420                 usbhs_pipe_stall(pipe);
 421
 422         return ret;
 423 }
 424
 425 /*
 426  *
 427  *              usb_dcp_ops
 428  *
 429  */
 430 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 431 {
 432         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 433         struct usbhs_pkt *pkt;
 434
 435         usbhs_pipe_disable(pipe);
 436
 437         while (1) {
 438                 pkt = usbhs_pkt_pop(pipe, NULL);
 439                 if (!pkt)
 440                         break;
 441         }
 442
 443         return 0;
 444 }
 445
 446 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 447 {
 448         int i;
 449         struct usbhsg_uep *uep;
 450
 451         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 452                 uep->pipe = NULL;
 453 }
 454
 455 /*
 456  *
 457  *              usb_ep_ops
 458  *
 459  */
 460 static int usbhsg_ep_enable(struct usb_ep *ep,
 461                          const struct usb_endpoint_descriptor *desc)
 462 {
 463         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 464         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 465         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 466         struct usbhs_pipe *pipe;
 467         int ret = -EIO;
 468
 469         /*
 470          * if it already have pipe,
 471          * nothing to do
 472          */
 473         if (uep->pipe) {
 474                 usbhs_pipe_clear(uep->pipe);
 475                 usbhs_pipe_sequence_data0(uep->pipe);
 476                 return 0;
 477         }
 478
 479         pipe = usbhs_pipe_malloc(priv,
 480                                  usb_endpoint_type(desc),
 481                                  usb_endpoint_dir_in(desc));
 482         if (pipe) {
 483                 uep->pipe               = pipe;
 484                 pipe->mod_private       = uep;
 485
 486                 /* set epnum / maxp */
 487                 usbhs_pipe_config_update(pipe, 0,
 488                                          usb_endpoint_num(desc),
 489                                          usb_endpoint_maxp(desc));
 490
 491                 /*
 492                  * usbhs_fifo_dma_push/pop_handler try to
 493                  * use dmaengine if possible.
 494                  * It will use pio handler if impossible.
 495                  */
 496                 if (usb_endpoint_dir_in(desc))
 497                         pipe->handler = &usbhs_fifo_dma_push_handler;
 498                 else
 499                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 500
 501                 ret = 0;
 502         }
 503
 504         return ret;
 505 }
 506
 507 static int usbhsg_ep_disable(struct usb_ep *ep)
 508 {
 509         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 510
 511         return usbhsg_pipe_disable(uep);
 512 }
 513
 514 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 515                                                    gfp_t gfp_flags)
 516 {
 517         struct usbhsg_request *ureq;
 518
 519         ureq = kzalloc(sizeof *ureq, gfp_flags);
 520         if (!ureq)
 521                 return NULL;
 522
 523         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 524
 525         ureq->req.dma = DMA_ADDR_INVALID;
 526
 527         return &ureq->req;
 528 }
 529
 530 static void usbhsg_ep_free_request(struct usb_ep *ep,
 531                                    struct usb_request *req)
 532 {
 533         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 534
 535         WARN_ON(!list_empty(&ureq->pkt.node));
 536         kfree(ureq);
 537 }
 538
 539 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 540                           gfp_t gfp_flags)
 541 {
 542         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 543         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 544         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 545         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 546
 547         /* param check */
 548         if (usbhsg_is_not_connected(gpriv)      ||
 549             unlikely(!gpriv->driver)            ||
 550             unlikely(!pipe))
 551                 return -ESHUTDOWN;
 552
 553         usbhsg_queue_push(uep, ureq);
 554
 555         return 0;
 556 }
 557
 558 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 559 {
 560         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 561         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 562         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 563
 564         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 565         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 566
 567         return 0;
 568 }
 569
 570 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 571 {
 572         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 573         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 574         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 575         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 576         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 577         unsigned long flags;
 578
 579         usbhsg_pipe_disable(uep);
 580
 581         dev_dbg(dev, "set halt %d (pipe %d)\n",
 582                 halt, usbhs_pipe_number(pipe));
 583
 584         /********************  spin lock ********************/
 585         usbhs_lock(priv, flags);
 586
 587         if (halt)
 588                 usbhs_pipe_stall(pipe);
 589         else
 590                 usbhs_pipe_disable(pipe);
 591
 592         if (halt && wedge)
 593                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 594         else
 595                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 596
 597         usbhs_unlock(priv, flags);
 598         /********************  spin unlock ******************/
 599
 600         return 0;
 601 }
 602
 603 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 604 {
 605         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 606 }
 607
 608 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 609 {
 610         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 611 }
 612
 613 static struct usb_ep_ops usbhsg_ep_ops = {
 614         .enable         = usbhsg_ep_enable,
 615         .disable        = usbhsg_ep_disable,
 616
 617         .alloc_request  = usbhsg_ep_alloc_request,
 618         .free_request   = usbhsg_ep_free_request,
 619
 620         .queue          = usbhsg_ep_queue,
 621         .dequeue        = usbhsg_ep_dequeue,
 622
 623         .set_halt       = usbhsg_ep_set_halt,
 624         .set_wedge      = usbhsg_ep_set_wedge,
 625 };
 626
 627 /*
 628  *              usb module start/end
 629  */
 630 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 631 {
 632         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 633         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 634         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 635         struct device *dev = usbhs_priv_to_dev(priv);
 636         unsigned long flags;
 637         int ret = 0;
 638
 639         /********************  spin lock ********************/
 640         usbhs_lock(priv, flags);
 641
 642         usbhsg_status_set(gpriv, status);
 643         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 644               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 645                 ret = -1; /* not ready */
 646
 647         usbhs_unlock(priv, flags);
 648         /********************  spin unlock ********************/
 649
 650         if (ret < 0)
 651                 return 0; /* not ready is not error */
 652
 653         /*
 654          * enable interrupt and systems if ready
 655          */
 656         dev_dbg(dev, "start gadget\n");
 657
 658         /*
 659          * pipe initialize and enable DCP
 660          */
 661         usbhs_pipe_init(priv,
 662                         usbhsg_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         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 670
 671         /*
 672          * system config enble
 673          * - HI speed
 674          * - function
 675          * - usb module
 676          */
 677         usbhs_sys_function_ctrl(priv, 1);
 678
 679         /*
 680          * enable irq callback
 681          */
 682         mod->irq_dev_state      = usbhsg_irq_dev_state;
 683         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 684         usbhs_irq_callback_update(priv, mod);
 685
 686         return 0;
 687 }
 688
 689 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 690 {
 691         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 692         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 693         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 694         struct device *dev = usbhs_priv_to_dev(priv);
 695         unsigned long flags;
 696         int ret = 0;
 697
 698         /********************  spin lock ********************/
 699         usbhs_lock(priv, flags);
 700
 701         usbhsg_status_clr(gpriv, status);
 702         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 703             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 704                 ret = -1; /* already done */
 705
 706         usbhs_unlock(priv, flags);
 707         /********************  spin unlock ********************/
 708
 709         if (ret < 0)
 710                 return 0; /* already done is not error */
 711
 712         /*
 713          * disable interrupt and systems if 1st try
 714          */
 715         usbhs_fifo_quit(priv);
 716
 717         /* disable all irq */
 718         mod->irq_dev_state      = NULL;
 719         mod->irq_ctrl_stage     = NULL;
 720         usbhs_irq_callback_update(priv, mod);
 721
 722         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 723
 724         /* disable sys */
 725         usbhs_sys_function_ctrl(priv, 0);
 726
 727         usbhsg_pipe_disable(dcp);
 728
 729         dev_dbg(dev, "stop gadget\n");
 730
 731         return 0;
 732 }
 733
 734 /*
 735  *
 736  *              linux usb function
 737  *
 738  */
 739 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 740                 struct usb_gadget_driver *driver)
 741 {
 742         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 743         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 744
 745         if (!driver             ||
 746             !driver->setup      ||
 747             driver->max_speed < USB_SPEED_FULL)
 748                 return -EINVAL;
 749
 750         /* first hook up the driver ... */
 751         gpriv->driver = driver;
 752         gpriv->gadget.dev.driver = &driver->driver;
 753
 754         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 755 }
 756
 757 static int usbhsg_gadget_stop(struct usb_gadget *gadget,
 758                 struct usb_gadget_driver *driver)
 759 {
 760         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 761         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 762
 763         if (!driver             ||
 764             !driver->unbind)
 765                 return -EINVAL;
 766
 767         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 768         gpriv->gadget.dev.driver = NULL;
 769         gpriv->driver = NULL;
 770
 771         return 0;
 772 }
 773
 774 /*
 775  *              usb gadget ops
 776  */
 777 static int usbhsg_get_frame(struct usb_gadget *gadget)
 778 {
 779         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 780         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 781
 782         return usbhs_frame_get_num(priv);
 783 }
 784
 785 static struct usb_gadget_ops usbhsg_gadget_ops = {
 786         .get_frame              = usbhsg_get_frame,
 787         .udc_start              = usbhsg_gadget_start,
 788         .udc_stop               = usbhsg_gadget_stop,
 789 };
 790
 791 static int usbhsg_start(struct usbhs_priv *priv)
 792 {
 793         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
 794 }
 795
 796 static int usbhsg_stop(struct usbhs_priv *priv)
 797 {
 798         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 799
 800         /* cable disconnect */
 801         if (gpriv->driver &&
 802             gpriv->driver->disconnect)
 803                 gpriv->driver->disconnect(&gpriv->gadget);
 804
 805         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 806 }
 807
 808 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 809 {
 810         struct usbhsg_gpriv *gpriv;
 811         struct usbhsg_uep *uep;
 812         struct device *dev = usbhs_priv_to_dev(priv);
 813         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 814         int i;
 815         int ret;
 816
 817         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
 818         if (!gpriv) {
 819                 dev_err(dev, "Could not allocate gadget priv\n");
 820                 return -ENOMEM;
 821         }
 822
 823         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
 824         if (!uep) {
 825                 dev_err(dev, "Could not allocate ep\n");
 826                 ret = -ENOMEM;
 827                 goto usbhs_mod_gadget_probe_err_gpriv;
 828         }
 829
 830         /*
 831          * CAUTION
 832          *
 833          * There is no guarantee that it is possible to access usb module here.
 834          * Don't accesses to it.
 835          * The accesse will be enable after "usbhsg_start"
 836          */
 837
 838         /*
 839          * register itself
 840          */
 841         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
 842
 843         /* init gpriv */
 844         gpriv->mod.name         = "gadget";
 845         gpriv->mod.start        = usbhsg_start;
 846         gpriv->mod.stop         = usbhsg_stop;
 847         gpriv->uep              = uep;
 848         gpriv->uep_size         = pipe_size;
 849         usbhsg_status_init(gpriv);
 850
 851         /*
 852          * init gadget
 853          */
 854         dev_set_name(&gpriv->gadget.dev, "gadget");
 855         gpriv->gadget.dev.parent        = dev;
 856         gpriv->gadget.name              = "renesas_usbhs_udc";
 857         gpriv->gadget.ops               = &usbhsg_gadget_ops;
 858         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
 859         ret = device_register(&gpriv->gadget.dev);
 860         if (ret < 0)
 861                 goto err_add_udc;
 862
 863         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
 864
 865         /*
 866          * init usb_ep
 867          */
 868         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
 869                 uep->gpriv      = gpriv;
 870                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
 871
 872                 uep->ep.name            = uep->ep_name;
 873                 uep->ep.ops             = &usbhsg_ep_ops;
 874                 INIT_LIST_HEAD(&uep->ep.ep_list);
 875
 876                 /* init DCP */
 877                 if (usbhsg_is_dcp(uep)) {
 878                         gpriv->gadget.ep0 = &uep->ep;
 879                         uep->ep.maxpacket = 64;
 880                 }
 881                 /* init normal pipe */
 882                 else {
 883                         uep->ep.maxpacket = 512;
 884                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
 885                 }
 886         }
 887
 888         usbhsg_controller_register(gpriv);
 889
 890         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
 891         if (ret)
 892                 goto err_register;
 893
 894
 895         dev_info(dev, "gadget probed\n");
 896
 897         return 0;
 898
 899 err_register:
 900         device_unregister(&gpriv->gadget.dev);
 901 err_add_udc:
 902         kfree(gpriv->uep);
 903
 904 usbhs_mod_gadget_probe_err_gpriv:
 905         kfree(gpriv);
 906
 907         return ret;
 908 }
 909
 910 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 911 {
 912         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 913
 914         usb_del_gadget_udc(&gpriv->gadget);
 915
 916         device_unregister(&gpriv->gadget.dev);
 917
 918         usbhsg_controller_unregister(gpriv);
 919
 920         kfree(gpriv->uep);
 921         kfree(gpriv);
 922 }