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