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_STANDARD / set feature functions
 286  */
 287 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
 288                                                  struct usbhsg_uep *uep,
 289                                                  struct usb_ctrlrequest *ctrl)
 290 {
 291         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 292
 293         usbhs_pipe_stall(pipe);
 294
 295         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 296
 297         return 0;
 298 }
 299
 300 struct usbhsg_recip_handle req_set_feature = {
 301         .name           = "set feature",
 302         .device         = usbhsg_recip_handler_std_control_done,
 303         .interface      = usbhsg_recip_handler_std_control_done,
 304         .endpoint       = usbhsg_recip_handler_std_set_endpoint,
 305 };
 306
 307 /*
 308  *              USB_TYPE handler
 309  */
 310 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 311                                    struct usbhsg_recip_handle *handler,
 312                                    struct usb_ctrlrequest *ctrl)
 313 {
 314         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 315         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 316         struct usbhsg_uep *uep;
 317         struct usbhs_pipe *pipe;
 318         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 319         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 320         int ret;
 321         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 322                     struct usb_ctrlrequest *ctrl);
 323         char *msg;
 324
 325         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 326         pipe = usbhsg_uep_to_pipe(uep);
 327         if (!pipe) {
 328                 dev_err(dev, "wrong recip request\n");
 329                 ret = -EINVAL;
 330                 goto usbhsg_recip_run_handle_end;
 331         }
 332
 333         switch (recip) {
 334         case USB_RECIP_DEVICE:
 335                 msg     = "DEVICE";
 336                 func    = handler->device;
 337                 break;
 338         case USB_RECIP_INTERFACE:
 339                 msg     = "INTERFACE";
 340                 func    = handler->interface;
 341                 break;
 342         case USB_RECIP_ENDPOINT:
 343                 msg     = "ENDPOINT";
 344                 func    = handler->endpoint;
 345                 break;
 346         default:
 347                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 348                 func = NULL;
 349                 ret = -EINVAL;
 350         }
 351
 352         if (func) {
 353                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 354                 ret = func(priv, uep, ctrl);
 355         }
 356
 357 usbhsg_recip_run_handle_end:
 358         usbhs_pkt_start(pipe);
 359
 360         return ret;
 361 }
 362
 363 /*
 364  *              irq functions
 365  *
 366  * it will be called from usbhs_interrupt
 367  */
 368 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 369                                 struct usbhs_irq_state *irq_state)
 370 {
 371         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 372         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 373
 374         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
 375
 376         dev_dbg(dev, "state = %x : speed : %d\n",
 377                 usbhs_status_get_device_state(irq_state),
 378                 gpriv->gadget.speed);
 379
 380         return 0;
 381 }
 382
 383 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 384                                  struct usbhs_irq_state *irq_state)
 385 {
 386         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 387         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 388         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 389         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 390         struct usb_ctrlrequest ctrl;
 391         struct usbhsg_recip_handle *recip_handler = NULL;
 392         int stage = usbhs_status_get_ctrl_stage(irq_state);
 393         int ret = 0;
 394
 395         dev_dbg(dev, "stage = %d\n", stage);
 396
 397         /*
 398          * see Manual
 399          *
 400          *  "Operation"
 401          *  - "Interrupt Function"
 402          *    - "Control Transfer Stage Transition Interrupt"
 403          *      - Fig. "Control Transfer Stage Transitions"
 404          */
 405
 406         switch (stage) {
 407         case READ_DATA_STAGE:
 408                 pipe->handler = &usbhs_fifo_pio_push_handler;
 409                 break;
 410         case WRITE_DATA_STAGE:
 411                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 412                 break;
 413         case NODATA_STATUS_STAGE:
 414                 pipe->handler = &usbhs_ctrl_stage_end_handler;
 415                 break;
 416         default:
 417                 return ret;
 418         }
 419
 420         /*
 421          * get usb request
 422          */
 423         usbhs_usbreq_get_val(priv, &ctrl);
 424
 425         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 426         case USB_TYPE_STANDARD:
 427                 switch (ctrl.bRequest) {
 428                 case USB_REQ_CLEAR_FEATURE:
 429                         recip_handler = &req_clear_feature;
 430                         break;
 431                 case USB_REQ_SET_FEATURE:
 432                         recip_handler = &req_set_feature;
 433                         break;
 434                 }
 435         }
 436
 437         /*
 438          * setup stage / run recip
 439          */
 440         if (recip_handler)
 441                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 442         else
 443                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 444
 445         if (ret < 0)
 446                 usbhs_pipe_stall(pipe);
 447
 448         return ret;
 449 }
 450
 451 /*
 452  *
 453  *              usb_dcp_ops
 454  *
 455  */
 456 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 457 {
 458         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 459         struct usbhs_pkt *pkt;
 460
 461         usbhs_pipe_disable(pipe);
 462
 463         while (1) {
 464                 pkt = usbhs_pkt_pop(pipe, NULL);
 465                 if (!pkt)
 466                         break;
 467         }
 468
 469         return 0;
 470 }
 471
 472 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
 473 {
 474         int i;
 475         struct usbhsg_uep *uep;
 476
 477         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 478                 uep->pipe = NULL;
 479 }
 480
 481 /*
 482  *
 483  *              usb_ep_ops
 484  *
 485  */
 486 static int usbhsg_ep_enable(struct usb_ep *ep,
 487                          const struct usb_endpoint_descriptor *desc)
 488 {
 489         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 490         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 491         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 492         struct usbhs_pipe *pipe;
 493         int ret = -EIO;
 494
 495         /*
 496          * if it already have pipe,
 497          * nothing to do
 498          */
 499         if (uep->pipe) {
 500                 usbhs_pipe_clear(uep->pipe);
 501                 usbhs_pipe_sequence_data0(uep->pipe);
 502                 return 0;
 503         }
 504
 505         pipe = usbhs_pipe_malloc(priv,
 506                                  usb_endpoint_type(desc),
 507                                  usb_endpoint_dir_in(desc));
 508         if (pipe) {
 509                 uep->pipe               = pipe;
 510                 pipe->mod_private       = uep;
 511
 512                 /* set epnum / maxp */
 513                 usbhs_pipe_config_update(pipe, 0,
 514                                          usb_endpoint_num(desc),
 515                                          usb_endpoint_maxp(desc));
 516
 517                 /*
 518                  * usbhs_fifo_dma_push/pop_handler try to
 519                  * use dmaengine if possible.
 520                  * It will use pio handler if impossible.
 521                  */
 522                 if (usb_endpoint_dir_in(desc))
 523                         pipe->handler = &usbhs_fifo_dma_push_handler;
 524                 else
 525                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 526
 527                 ret = 0;
 528         }
 529
 530         return ret;
 531 }
 532
 533 static int usbhsg_ep_disable(struct usb_ep *ep)
 534 {
 535         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 536
 537         return usbhsg_pipe_disable(uep);
 538 }
 539
 540 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 541                                                    gfp_t gfp_flags)
 542 {
 543         struct usbhsg_request *ureq;
 544
 545         ureq = kzalloc(sizeof *ureq, gfp_flags);
 546         if (!ureq)
 547                 return NULL;
 548
 549         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 550
 551         ureq->req.dma = DMA_ADDR_INVALID;
 552
 553         return &ureq->req;
 554 }
 555
 556 static void usbhsg_ep_free_request(struct usb_ep *ep,
 557                                    struct usb_request *req)
 558 {
 559         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 560
 561         WARN_ON(!list_empty(&ureq->pkt.node));
 562         kfree(ureq);
 563 }
 564
 565 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 566                           gfp_t gfp_flags)
 567 {
 568         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 569         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 570         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 571         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 572
 573         /* param check */
 574         if (usbhsg_is_not_connected(gpriv)      ||
 575             unlikely(!gpriv->driver)            ||
 576             unlikely(!pipe))
 577                 return -ESHUTDOWN;
 578
 579         usbhsg_queue_push(uep, ureq);
 580
 581         return 0;
 582 }
 583
 584 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 585 {
 586         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 587         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 588         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 589
 590         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 591         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 592
 593         return 0;
 594 }
 595
 596 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 597 {
 598         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 599         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 600         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 601         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 602         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 603         unsigned long flags;
 604
 605         usbhsg_pipe_disable(uep);
 606
 607         dev_dbg(dev, "set halt %d (pipe %d)\n",
 608                 halt, usbhs_pipe_number(pipe));
 609
 610         /********************  spin lock ********************/
 611         usbhs_lock(priv, flags);
 612
 613         if (halt)
 614                 usbhs_pipe_stall(pipe);
 615         else
 616                 usbhs_pipe_disable(pipe);
 617
 618         if (halt && wedge)
 619                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 620         else
 621                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 622
 623         usbhs_unlock(priv, flags);
 624         /********************  spin unlock ******************/
 625
 626         return 0;
 627 }
 628
 629 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 630 {
 631         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 632 }
 633
 634 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 635 {
 636         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 637 }
 638
 639 static struct usb_ep_ops usbhsg_ep_ops = {
 640         .enable         = usbhsg_ep_enable,
 641         .disable        = usbhsg_ep_disable,
 642
 643         .alloc_request  = usbhsg_ep_alloc_request,
 644         .free_request   = usbhsg_ep_free_request,
 645
 646         .queue          = usbhsg_ep_queue,
 647         .dequeue        = usbhsg_ep_dequeue,
 648
 649         .set_halt       = usbhsg_ep_set_halt,
 650         .set_wedge      = usbhsg_ep_set_wedge,
 651 };
 652
 653 /*
 654  *              usb module start/end
 655  */
 656 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 657 {
 658         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 659         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 660         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 661         struct device *dev = usbhs_priv_to_dev(priv);
 662         unsigned long flags;
 663         int ret = 0;
 664
 665         /********************  spin lock ********************/
 666         usbhs_lock(priv, flags);
 667
 668         usbhsg_status_set(gpriv, status);
 669         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 670               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 671                 ret = -1; /* not ready */
 672
 673         usbhs_unlock(priv, flags);
 674         /********************  spin unlock ********************/
 675
 676         if (ret < 0)
 677                 return 0; /* not ready is not error */
 678
 679         /*
 680          * enable interrupt and systems if ready
 681          */
 682         dev_dbg(dev, "start gadget\n");
 683
 684         /*
 685          * pipe initialize and enable DCP
 686          */
 687         usbhs_pipe_init(priv,
 688                         usbhsg_dma_map_ctrl);
 689         usbhs_fifo_init(priv);
 690         usbhsg_uep_init(gpriv);
 691
 692         /* dcp init */
 693         dcp->pipe               = usbhs_dcp_malloc(priv);
 694         dcp->pipe->mod_private  = dcp;
 695         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 696
 697         /*
 698          * system config enble
 699          * - HI speed
 700          * - function
 701          * - usb module
 702          */
 703         usbhs_sys_function_ctrl(priv, 1);
 704
 705         /*
 706          * enable irq callback
 707          */
 708         mod->irq_dev_state      = usbhsg_irq_dev_state;
 709         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 710         usbhs_irq_callback_update(priv, mod);
 711
 712         return 0;
 713 }
 714
 715 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 716 {
 717         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 718         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 719         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 720         struct device *dev = usbhs_priv_to_dev(priv);
 721         unsigned long flags;
 722         int ret = 0;
 723
 724         /********************  spin lock ********************/
 725         usbhs_lock(priv, flags);
 726
 727         usbhsg_status_clr(gpriv, status);
 728         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 729             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 730                 ret = -1; /* already done */
 731
 732         usbhs_unlock(priv, flags);
 733         /********************  spin unlock ********************/
 734
 735         if (ret < 0)
 736                 return 0; /* already done is not error */
 737
 738         /*
 739          * disable interrupt and systems if 1st try
 740          */
 741         usbhs_fifo_quit(priv);
 742
 743         /* disable all irq */
 744         mod->irq_dev_state      = NULL;
 745         mod->irq_ctrl_stage     = NULL;
 746         usbhs_irq_callback_update(priv, mod);
 747
 748         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 749
 750         /* disable sys */
 751         usbhs_sys_function_ctrl(priv, 0);
 752
 753         usbhsg_pipe_disable(dcp);
 754
 755         dev_dbg(dev, "stop gadget\n");
 756
 757         return 0;
 758 }
 759
 760 /*
 761  *
 762  *              linux usb function
 763  *
 764  */
 765 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 766                 struct usb_gadget_driver *driver)
 767 {
 768         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 769         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 770
 771         if (!driver             ||
 772             !driver->setup      ||
 773             driver->max_speed < USB_SPEED_FULL)
 774                 return -EINVAL;
 775
 776         /* first hook up the driver ... */
 777         gpriv->driver = driver;
 778         gpriv->gadget.dev.driver = &driver->driver;
 779
 780         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 781 }
 782
 783 static int usbhsg_gadget_stop(struct usb_gadget *gadget,
 784                 struct usb_gadget_driver *driver)
 785 {
 786         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 787         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 788
 789         if (!driver             ||
 790             !driver->unbind)
 791                 return -EINVAL;
 792
 793         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 794         gpriv->gadget.dev.driver = NULL;
 795         gpriv->driver = NULL;
 796
 797         return 0;
 798 }
 799
 800 /*
 801  *              usb gadget ops
 802  */
 803 static int usbhsg_get_frame(struct usb_gadget *gadget)
 804 {
 805         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 806         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 807
 808         return usbhs_frame_get_num(priv);
 809 }
 810
 811 static struct usb_gadget_ops usbhsg_gadget_ops = {
 812         .get_frame              = usbhsg_get_frame,
 813         .udc_start              = usbhsg_gadget_start,
 814         .udc_stop               = usbhsg_gadget_stop,
 815 };
 816
 817 static int usbhsg_start(struct usbhs_priv *priv)
 818 {
 819         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
 820 }
 821
 822 static int usbhsg_stop(struct usbhs_priv *priv)
 823 {
 824         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 825
 826         /* cable disconnect */
 827         if (gpriv->driver &&
 828             gpriv->driver->disconnect)
 829                 gpriv->driver->disconnect(&gpriv->gadget);
 830
 831         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 832 }
 833
 834 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 835 {
 836         struct usbhsg_gpriv *gpriv;
 837         struct usbhsg_uep *uep;
 838         struct device *dev = usbhs_priv_to_dev(priv);
 839         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 840         int i;
 841         int ret;
 842
 843         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
 844         if (!gpriv) {
 845                 dev_err(dev, "Could not allocate gadget priv\n");
 846                 return -ENOMEM;
 847         }
 848
 849         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
 850         if (!uep) {
 851                 dev_err(dev, "Could not allocate ep\n");
 852                 ret = -ENOMEM;
 853                 goto usbhs_mod_gadget_probe_err_gpriv;
 854         }
 855
 856         /*
 857          * CAUTION
 858          *
 859          * There is no guarantee that it is possible to access usb module here.
 860          * Don't accesses to it.
 861          * The accesse will be enable after "usbhsg_start"
 862          */
 863
 864         /*
 865          * register itself
 866          */
 867         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
 868
 869         /* init gpriv */
 870         gpriv->mod.name         = "gadget";
 871         gpriv->mod.start        = usbhsg_start;
 872         gpriv->mod.stop         = usbhsg_stop;
 873         gpriv->uep              = uep;
 874         gpriv->uep_size         = pipe_size;
 875         usbhsg_status_init(gpriv);
 876
 877         /*
 878          * init gadget
 879          */
 880         dev_set_name(&gpriv->gadget.dev, "gadget");
 881         gpriv->gadget.dev.parent        = dev;
 882         gpriv->gadget.name              = "renesas_usbhs_udc";
 883         gpriv->gadget.ops               = &usbhsg_gadget_ops;
 884         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
 885         ret = device_register(&gpriv->gadget.dev);
 886         if (ret < 0)
 887                 goto err_add_udc;
 888
 889         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
 890
 891         /*
 892          * init usb_ep
 893          */
 894         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
 895                 uep->gpriv      = gpriv;
 896                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
 897
 898                 uep->ep.name            = uep->ep_name;
 899                 uep->ep.ops             = &usbhsg_ep_ops;
 900                 INIT_LIST_HEAD(&uep->ep.ep_list);
 901
 902                 /* init DCP */
 903                 if (usbhsg_is_dcp(uep)) {
 904                         gpriv->gadget.ep0 = &uep->ep;
 905                         uep->ep.maxpacket = 64;
 906                 }
 907                 /* init normal pipe */
 908                 else {
 909                         uep->ep.maxpacket = 512;
 910                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
 911                 }
 912         }
 913
 914         usbhsg_controller_register(gpriv);
 915
 916         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
 917         if (ret)
 918                 goto err_register;
 919
 920
 921         dev_info(dev, "gadget probed\n");
 922
 923         return 0;
 924
 925 err_register:
 926         device_unregister(&gpriv->gadget.dev);
 927 err_add_udc:
 928         kfree(gpriv->uep);
 929
 930 usbhs_mod_gadget_probe_err_gpriv:
 931         kfree(gpriv);
 932
 933         return ret;
 934 }
 935
 936 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 937 {
 938         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 939
 940         usb_del_gadget_udc(&gpriv->gadget);
 941
 942         device_unregister(&gpriv->gadget.dev);
 943
 944         usbhsg_controller_unregister(gpriv);
 945
 946         kfree(gpriv->uep);
 947         kfree(gpriv);
 948 }