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/delay.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/io.h>
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/usb/ch9.h>
  23 #include <linux/usb/gadget.h>
  24 #include "common.h"
  25
  26 /*
  27  *              struct
  28  */
  29 struct usbhsg_request {
  30         struct usb_request      req;
  31         struct usbhs_pkt        pkt;
  32 };
  33
  34 #define EP_NAME_SIZE 8
  35 struct usbhsg_gpriv;
  36 struct usbhsg_uep {
  37         struct usb_ep            ep;
  38         struct usbhs_pipe       *pipe;
  39
  40         char ep_name[EP_NAME_SIZE];
  41
  42         struct usbhsg_gpriv *gpriv;
  43 };
  44
  45 struct usbhsg_gpriv {
  46         struct usb_gadget        gadget;
  47         struct usbhs_mod         mod;
  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 #define USBHSG_STATUS_SELF_POWERED      (1 << 3)
  59 #define USBHSG_STATUS_SOFT_CONNECT      (1 << 4)
  60 };
  61
  62 struct usbhsg_recip_handle {
  63         char *name;
  64         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  65                       struct usb_ctrlrequest *ctrl);
  66         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  67                          struct usb_ctrlrequest *ctrl);
  68         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  69                         struct usb_ctrlrequest *ctrl);
  70 };
  71
  72 /*
  73  *              macro
  74  */
  75 #define usbhsg_priv_to_gpriv(priv)                      \
  76         container_of(                                   \
  77                 usbhs_mod_get(priv, USBHS_GADGET),      \
  78                 struct usbhsg_gpriv, mod)
  79
  80 #define __usbhsg_for_each_uep(start, pos, g, i) \
  81         for ((i) = start;                                       \
  82              ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
  83              (i)++)
  84
  85 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  86         __usbhsg_for_each_uep(1, pos, gpriv, i)
  87
  88 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  89         __usbhsg_for_each_uep(0, pos, gpriv, i)
  90
  91 #define usbhsg_gadget_to_gpriv(g)\
  92         container_of(g, struct usbhsg_gpriv, gadget)
  93
  94 #define usbhsg_req_to_ureq(r)\
  95         container_of(r, struct usbhsg_request, req)
  96
  97 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
  98 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
  99 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
 100 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
 101 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
 102 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 103 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 104 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 105 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 106
 107 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
 108 #define usbhsg_pkt_to_ureq(i)   \
 109         container_of(i, struct usbhsg_request, pkt)
 110
 111 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 112
 113 /* status */
 114 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 115 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 116 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 117 #define usbhsg_status_has(gp, b) (gp->status &   b)
 118
 119 /*
 120  *              queue push/pop
 121  */
 122 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 123                              struct usbhsg_request *ureq,
 124                              int status)
 125 {
 126         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 127         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 128         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 129
 130         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 131
 132         ureq->req.status = status;
 133         usb_gadget_giveback_request(&uep->ep, &ureq->req);
 134 }
 135
 136 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 137 {
 138         struct usbhs_pipe *pipe = pkt->pipe;
 139         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 140         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 141
 142         ureq->req.actual = pkt->actual;
 143
 144         usbhsg_queue_pop(uep, ureq, 0);
 145 }
 146
 147 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 148                               struct usbhsg_request *ureq)
 149 {
 150         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 151         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 152         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 153         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 154         struct usb_request *req = &ureq->req;
 155
 156         req->actual = 0;
 157         req->status = -EINPROGRESS;
 158         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
 159                        req->buf, req->length, req->zero, -1);
 160         usbhs_pkt_start(pipe);
 161
 162         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 163                 usbhs_pipe_number(pipe),
 164                 req->length);
 165 }
 166
 167 /*
 168  *              dma map/unmap
 169  */
 170 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 171 {
 172         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 173         struct usb_request *req = &ureq->req;
 174         struct usbhs_pipe *pipe = pkt->pipe;
 175         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 176         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 177         enum dma_data_direction dir;
 178         int ret = 0;
 179
 180         dir = usbhs_pipe_is_dir_host(pipe);
 181
 182         if (map) {
 183                 /* it can not use scatter/gather */
 184                 WARN_ON(req->num_sgs);
 185
 186                 ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
 187                 if (ret < 0)
 188                         return ret;
 189
 190                 pkt->dma = req->dma;
 191         } else {
 192                 usb_gadget_unmap_request(&gpriv->gadget, req, dir);
 193         }
 194
 195         return ret;
 196 }
 197
 198 /*
 199  *              USB_TYPE_STANDARD / clear feature functions
 200  */
 201 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 202                                                  struct usbhsg_uep *uep,
 203                                                  struct usb_ctrlrequest *ctrl)
 204 {
 205         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 206         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 207         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 208
 209         usbhs_dcp_control_transfer_done(pipe);
 210
 211         return 0;
 212 }
 213
 214 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 215                                                    struct usbhsg_uep *uep,
 216                                                    struct usb_ctrlrequest *ctrl)
 217 {
 218         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 219         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 220
 221         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 222                 usbhs_pipe_disable(pipe);
 223                 usbhs_pipe_sequence_data0(pipe);
 224                 usbhs_pipe_enable(pipe);
 225         }
 226
 227         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 228
 229         usbhs_pkt_start(pipe);
 230
 231         return 0;
 232 }
 233
 234 static struct usbhsg_recip_handle req_clear_feature = {
 235         .name           = "clear feature",
 236         .device         = usbhsg_recip_handler_std_control_done,
 237         .interface      = usbhsg_recip_handler_std_control_done,
 238         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 239 };
 240
 241 /*
 242  *              USB_TYPE_STANDARD / set feature functions
 243  */
 244 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
 245                                                  struct usbhsg_uep *uep,
 246                                                  struct usb_ctrlrequest *ctrl)
 247 {
 248         switch (le16_to_cpu(ctrl->wValue)) {
 249         case USB_DEVICE_TEST_MODE:
 250                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 251                 udelay(100);
 252                 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
 253                 break;
 254         default:
 255                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 256                 break;
 257         }
 258
 259         return 0;
 260 }
 261
 262 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
 263                                                  struct usbhsg_uep *uep,
 264                                                  struct usb_ctrlrequest *ctrl)
 265 {
 266         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 267
 268         usbhs_pipe_stall(pipe);
 269
 270         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 271
 272         return 0;
 273 }
 274
 275 static struct usbhsg_recip_handle req_set_feature = {
 276         .name           = "set feature",
 277         .device         = usbhsg_recip_handler_std_set_device,
 278         .interface      = usbhsg_recip_handler_std_control_done,
 279         .endpoint       = usbhsg_recip_handler_std_set_endpoint,
 280 };
 281
 282 /*
 283  *              USB_TYPE_STANDARD / get status functions
 284  */
 285 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
 286                                          struct usb_request *req)
 287 {
 288         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 289
 290         /* free allocated recip-buffer/usb_request */
 291         kfree(ureq->pkt.buf);
 292         usb_ep_free_request(ep, req);
 293 }
 294
 295 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
 296                                        unsigned short status)
 297 {
 298         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 299         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 300         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 301         struct usb_request *req;
 302         unsigned short *buf;
 303
 304         /* alloc new usb_request for recip */
 305         req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
 306         if (!req) {
 307                 dev_err(dev, "recip request allocation fail\n");
 308                 return;
 309         }
 310
 311         /* alloc recip data buffer */
 312         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
 313         if (!buf) {
 314                 usb_ep_free_request(&dcp->ep, req);
 315                 dev_err(dev, "recip data allocation fail\n");
 316                 return;
 317         }
 318
 319         /* recip data is status */
 320         *buf = cpu_to_le16(status);
 321
 322         /* allocated usb_request/buffer will be freed */
 323         req->complete   = __usbhsg_recip_send_complete;
 324         req->buf        = buf;
 325         req->length     = sizeof(*buf);
 326         req->zero       = 0;
 327
 328         /* push packet */
 329         pipe->handler = &usbhs_fifo_pio_push_handler;
 330         usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
 331 }
 332
 333 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
 334                                                struct usbhsg_uep *uep,
 335                                                struct usb_ctrlrequest *ctrl)
 336 {
 337         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 338         unsigned short status = 0;
 339
 340         if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
 341                 status = 1 << USB_DEVICE_SELF_POWERED;
 342
 343         __usbhsg_recip_send_status(gpriv, status);
 344
 345         return 0;
 346 }
 347
 348 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
 349                                                   struct usbhsg_uep *uep,
 350                                                   struct usb_ctrlrequest *ctrl)
 351 {
 352         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 353         unsigned short status = 0;
 354
 355         __usbhsg_recip_send_status(gpriv, status);
 356
 357         return 0;
 358 }
 359
 360 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
 361                                                  struct usbhsg_uep *uep,
 362                                                  struct usb_ctrlrequest *ctrl)
 363 {
 364         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 365         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 366         unsigned short status = 0;
 367
 368         if (usbhs_pipe_is_stall(pipe))
 369                 status = 1 << USB_ENDPOINT_HALT;
 370
 371         __usbhsg_recip_send_status(gpriv, status);
 372
 373         return 0;
 374 }
 375
 376 static struct usbhsg_recip_handle req_get_status = {
 377         .name           = "get status",
 378         .device         = usbhsg_recip_handler_std_get_device,
 379         .interface      = usbhsg_recip_handler_std_get_interface,
 380         .endpoint       = usbhsg_recip_handler_std_get_endpoint,
 381 };
 382
 383 /*
 384  *              USB_TYPE handler
 385  */
 386 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 387                                    struct usbhsg_recip_handle *handler,
 388                                    struct usb_ctrlrequest *ctrl)
 389 {
 390         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 391         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 392         struct usbhsg_uep *uep;
 393         struct usbhs_pipe *pipe;
 394         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 395         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 396         int ret = 0;
 397         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 398                     struct usb_ctrlrequest *ctrl);
 399         char *msg;
 400
 401         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 402         pipe = usbhsg_uep_to_pipe(uep);
 403         if (!pipe) {
 404                 dev_err(dev, "wrong recip request\n");
 405                 return -EINVAL;
 406         }
 407
 408         switch (recip) {
 409         case USB_RECIP_DEVICE:
 410                 msg     = "DEVICE";
 411                 func    = handler->device;
 412                 break;
 413         case USB_RECIP_INTERFACE:
 414                 msg     = "INTERFACE";
 415                 func    = handler->interface;
 416                 break;
 417         case USB_RECIP_ENDPOINT:
 418                 msg     = "ENDPOINT";
 419                 func    = handler->endpoint;
 420                 break;
 421         default:
 422                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 423                 func = NULL;
 424                 ret = -EINVAL;
 425         }
 426
 427         if (func) {
 428                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 429                 ret = func(priv, uep, ctrl);
 430         }
 431
 432         return ret;
 433 }
 434
 435 /*
 436  *              irq functions
 437  *
 438  * it will be called from usbhs_interrupt
 439  */
 440 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 441                                 struct usbhs_irq_state *irq_state)
 442 {
 443         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 444         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 445
 446         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
 447
 448         dev_dbg(dev, "state = %x : speed : %d\n",
 449                 usbhs_status_get_device_state(irq_state),
 450                 gpriv->gadget.speed);
 451
 452         return 0;
 453 }
 454
 455 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 456                                  struct usbhs_irq_state *irq_state)
 457 {
 458         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 459         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 460         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 461         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 462         struct usb_ctrlrequest ctrl;
 463         struct usbhsg_recip_handle *recip_handler = NULL;
 464         int stage = usbhs_status_get_ctrl_stage(irq_state);
 465         int ret = 0;
 466
 467         dev_dbg(dev, "stage = %d\n", stage);
 468
 469         /*
 470          * see Manual
 471          *
 472          *  "Operation"
 473          *  - "Interrupt Function"
 474          *    - "Control Transfer Stage Transition Interrupt"
 475          *      - Fig. "Control Transfer Stage Transitions"
 476          */
 477
 478         switch (stage) {
 479         case READ_DATA_STAGE:
 480                 pipe->handler = &usbhs_fifo_pio_push_handler;
 481                 break;
 482         case WRITE_DATA_STAGE:
 483                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 484                 break;
 485         case NODATA_STATUS_STAGE:
 486                 pipe->handler = &usbhs_ctrl_stage_end_handler;
 487                 break;
 488         case READ_STATUS_STAGE:
 489         case WRITE_STATUS_STAGE:
 490                 usbhs_dcp_control_transfer_done(pipe);
 491         default:
 492                 return ret;
 493         }
 494
 495         /*
 496          * get usb request
 497          */
 498         usbhs_usbreq_get_val(priv, &ctrl);
 499
 500         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 501         case USB_TYPE_STANDARD:
 502                 switch (ctrl.bRequest) {
 503                 case USB_REQ_CLEAR_FEATURE:
 504                         recip_handler = &req_clear_feature;
 505                         break;
 506                 case USB_REQ_SET_FEATURE:
 507                         recip_handler = &req_set_feature;
 508                         break;
 509                 case USB_REQ_GET_STATUS:
 510                         recip_handler = &req_get_status;
 511                         break;
 512                 }
 513         }
 514
 515         /*
 516          * setup stage / run recip
 517          */
 518         if (recip_handler)
 519                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 520         else
 521                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 522
 523         if (ret < 0)
 524                 usbhs_pipe_stall(pipe);
 525
 526         return ret;
 527 }
 528
 529 /*
 530  *
 531  *              usb_dcp_ops
 532  *
 533  */
 534 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 535 {
 536         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 537         struct usbhs_pkt *pkt;
 538
 539         while (1) {
 540                 pkt = usbhs_pkt_pop(pipe, NULL);
 541                 if (!pkt)
 542                         break;
 543
 544                 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET);
 545         }
 546
 547         usbhs_pipe_disable(pipe);
 548
 549         return 0;
 550 }
 551
 552 /*
 553  *
 554  *              usb_ep_ops
 555  *
 556  */
 557 static int usbhsg_ep_enable(struct usb_ep *ep,
 558                          const struct usb_endpoint_descriptor *desc)
 559 {
 560         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 561         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 562         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 563         struct usbhs_pipe *pipe;
 564         int ret = -EIO;
 565
 566         /*
 567          * if it already have pipe,
 568          * nothing to do
 569          */
 570         if (uep->pipe) {
 571                 usbhs_pipe_clear(uep->pipe);
 572                 usbhs_pipe_sequence_data0(uep->pipe);
 573                 return 0;
 574         }
 575
 576         pipe = usbhs_pipe_malloc(priv,
 577                                  usb_endpoint_type(desc),
 578                                  usb_endpoint_dir_in(desc));
 579         if (pipe) {
 580                 uep->pipe               = pipe;
 581                 pipe->mod_private       = uep;
 582
 583                 /* set epnum / maxp */
 584                 usbhs_pipe_config_update(pipe, 0,
 585                                          usb_endpoint_num(desc),
 586                                          usb_endpoint_maxp(desc));
 587
 588                 /*
 589                  * usbhs_fifo_dma_push/pop_handler try to
 590                  * use dmaengine if possible.
 591                  * It will use pio handler if impossible.
 592                  */
 593                 if (usb_endpoint_dir_in(desc))
 594                         pipe->handler = &usbhs_fifo_dma_push_handler;
 595                 else
 596                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 597
 598                 ret = 0;
 599         }
 600
 601         return ret;
 602 }
 603
 604 static int usbhsg_ep_disable(struct usb_ep *ep)
 605 {
 606         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 607         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 608
 609         if (!pipe)
 610                 return -EINVAL;
 611
 612         usbhsg_pipe_disable(uep);
 613         usbhs_pipe_free(pipe);
 614
 615         uep->pipe->mod_private  = NULL;
 616         uep->pipe               = NULL;
 617
 618         return 0;
 619 }
 620
 621 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 622                                                    gfp_t gfp_flags)
 623 {
 624         struct usbhsg_request *ureq;
 625
 626         ureq = kzalloc(sizeof *ureq, gfp_flags);
 627         if (!ureq)
 628                 return NULL;
 629
 630         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 631
 632         return &ureq->req;
 633 }
 634
 635 static void usbhsg_ep_free_request(struct usb_ep *ep,
 636                                    struct usb_request *req)
 637 {
 638         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 639
 640         WARN_ON(!list_empty(&ureq->pkt.node));
 641         kfree(ureq);
 642 }
 643
 644 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 645                           gfp_t gfp_flags)
 646 {
 647         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 648         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 649         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 650         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 651
 652         /* param check */
 653         if (usbhsg_is_not_connected(gpriv)      ||
 654             unlikely(!gpriv->driver)            ||
 655             unlikely(!pipe))
 656                 return -ESHUTDOWN;
 657
 658         usbhsg_queue_push(uep, ureq);
 659
 660         return 0;
 661 }
 662
 663 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 664 {
 665         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 666         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 667         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 668
 669         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 670         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 671
 672         return 0;
 673 }
 674
 675 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 676 {
 677         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 678         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 679         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 680         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 681         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 682         unsigned long flags;
 683
 684         usbhsg_pipe_disable(uep);
 685
 686         dev_dbg(dev, "set halt %d (pipe %d)\n",
 687                 halt, usbhs_pipe_number(pipe));
 688
 689         /********************  spin lock ********************/
 690         usbhs_lock(priv, flags);
 691
 692         if (halt)
 693                 usbhs_pipe_stall(pipe);
 694         else
 695                 usbhs_pipe_disable(pipe);
 696
 697         if (halt && wedge)
 698                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 699         else
 700                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 701
 702         usbhs_unlock(priv, flags);
 703         /********************  spin unlock ******************/
 704
 705         return 0;
 706 }
 707
 708 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 709 {
 710         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 711 }
 712
 713 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 714 {
 715         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 716 }
 717
 718 static struct usb_ep_ops usbhsg_ep_ops = {
 719         .enable         = usbhsg_ep_enable,
 720         .disable        = usbhsg_ep_disable,
 721
 722         .alloc_request  = usbhsg_ep_alloc_request,
 723         .free_request   = usbhsg_ep_free_request,
 724
 725         .queue          = usbhsg_ep_queue,
 726         .dequeue        = usbhsg_ep_dequeue,
 727
 728         .set_halt       = usbhsg_ep_set_halt,
 729         .set_wedge      = usbhsg_ep_set_wedge,
 730 };
 731
 732 /*
 733  *              pullup control
 734  */
 735 static int usbhsg_can_pullup(struct usbhs_priv *priv)
 736 {
 737         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 738
 739         return gpriv->driver &&
 740                usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 741 }
 742
 743 static void usbhsg_update_pullup(struct usbhs_priv *priv)
 744 {
 745         if (usbhsg_can_pullup(priv))
 746                 usbhs_sys_function_pullup(priv, 1);
 747         else
 748                 usbhs_sys_function_pullup(priv, 0);
 749 }
 750
 751 /*
 752  *              usb module start/end
 753  */
 754 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 755 {
 756         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 757         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 758         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 759         struct device *dev = usbhs_priv_to_dev(priv);
 760         unsigned long flags;
 761         int ret = 0;
 762
 763         /********************  spin lock ********************/
 764         usbhs_lock(priv, flags);
 765
 766         usbhsg_status_set(gpriv, status);
 767         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 768               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 769                 ret = -1; /* not ready */
 770
 771         usbhs_unlock(priv, flags);
 772         /********************  spin unlock ********************/
 773
 774         if (ret < 0)
 775                 return 0; /* not ready is not error */
 776
 777         /*
 778          * enable interrupt and systems if ready
 779          */
 780         dev_dbg(dev, "start gadget\n");
 781
 782         /*
 783          * pipe initialize and enable DCP
 784          */
 785         usbhs_fifo_init(priv);
 786         usbhs_pipe_init(priv,
 787                         usbhsg_dma_map_ctrl);
 788
 789         /* dcp init instead of usbhsg_ep_enable() */
 790         dcp->pipe               = usbhs_dcp_malloc(priv);
 791         dcp->pipe->mod_private  = dcp;
 792         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 793
 794         /*
 795          * system config enble
 796          * - HI speed
 797          * - function
 798          * - usb module
 799          */
 800         usbhs_sys_function_ctrl(priv, 1);
 801         usbhsg_update_pullup(priv);
 802
 803         /*
 804          * enable irq callback
 805          */
 806         mod->irq_dev_state      = usbhsg_irq_dev_state;
 807         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 808         usbhs_irq_callback_update(priv, mod);
 809
 810         return 0;
 811 }
 812
 813 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 814 {
 815         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 816         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 817         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 818         struct device *dev = usbhs_priv_to_dev(priv);
 819         unsigned long flags;
 820         int ret = 0;
 821
 822         /********************  spin lock ********************/
 823         usbhs_lock(priv, flags);
 824
 825         usbhsg_status_clr(gpriv, status);
 826         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 827             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 828                 ret = -1; /* already done */
 829
 830         usbhs_unlock(priv, flags);
 831         /********************  spin unlock ********************/
 832
 833         if (ret < 0)
 834                 return 0; /* already done is not error */
 835
 836         /*
 837          * disable interrupt and systems if 1st try
 838          */
 839         usbhs_fifo_quit(priv);
 840
 841         /* disable all irq */
 842         mod->irq_dev_state      = NULL;
 843         mod->irq_ctrl_stage     = NULL;
 844         usbhs_irq_callback_update(priv, mod);
 845
 846         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 847
 848         /* disable sys */
 849         usbhs_sys_set_test_mode(priv, 0);
 850         usbhs_sys_function_ctrl(priv, 0);
 851
 852         usbhsg_ep_disable(&dcp->ep);
 853
 854         dev_dbg(dev, "stop gadget\n");
 855
 856         return 0;
 857 }
 858
 859 /*
 860  *
 861  *              linux usb function
 862  *
 863  */
 864 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 865                 struct usb_gadget_driver *driver)
 866 {
 867         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 868         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 869
 870         if (!driver             ||
 871             !driver->setup      ||
 872             driver->max_speed < USB_SPEED_FULL)
 873                 return -EINVAL;
 874
 875         /* first hook up the driver ... */
 876         gpriv->driver = driver;
 877
 878         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 879 }
 880
 881 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
 882 {
 883         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 884         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 885
 886         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 887         gpriv->driver = NULL;
 888
 889         return 0;
 890 }
 891
 892 /*
 893  *              usb gadget ops
 894  */
 895 static int usbhsg_get_frame(struct usb_gadget *gadget)
 896 {
 897         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 898         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 899
 900         return usbhs_frame_get_num(priv);
 901 }
 902
 903 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
 904 {
 905         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 906         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 907         unsigned long flags;
 908
 909         usbhs_lock(priv, flags);
 910         if (is_on)
 911                 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 912         else
 913                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 914         usbhsg_update_pullup(priv);
 915         usbhs_unlock(priv, flags);
 916
 917         return 0;
 918 }
 919
 920 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
 921 {
 922         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 923
 924         if (is_self)
 925                 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
 926         else
 927                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
 928
 929         gadget->is_selfpowered = (is_self != 0);
 930
 931         return 0;
 932 }
 933
 934 static const struct usb_gadget_ops usbhsg_gadget_ops = {
 935         .get_frame              = usbhsg_get_frame,
 936         .set_selfpowered        = usbhsg_set_selfpowered,
 937         .udc_start              = usbhsg_gadget_start,
 938         .udc_stop               = usbhsg_gadget_stop,
 939         .pullup                 = usbhsg_pullup,
 940 };
 941
 942 static int usbhsg_start(struct usbhs_priv *priv)
 943 {
 944         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
 945 }
 946
 947 static int usbhsg_stop(struct usbhs_priv *priv)
 948 {
 949         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 950
 951         /* cable disconnect */
 952         if (gpriv->driver &&
 953             gpriv->driver->disconnect)
 954                 gpriv->driver->disconnect(&gpriv->gadget);
 955
 956         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 957 }
 958
 959 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 960 {
 961         struct usbhsg_gpriv *gpriv;
 962         struct usbhsg_uep *uep;
 963         struct device *dev = usbhs_priv_to_dev(priv);
 964         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 965         int i;
 966         int ret;
 967
 968         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
 969         if (!gpriv) {
 970                 dev_err(dev, "Could not allocate gadget priv\n");
 971                 return -ENOMEM;
 972         }
 973
 974         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
 975         if (!uep) {
 976                 dev_err(dev, "Could not allocate ep\n");
 977                 ret = -ENOMEM;
 978                 goto usbhs_mod_gadget_probe_err_gpriv;
 979         }
 980
 981         /*
 982          * CAUTION
 983          *
 984          * There is no guarantee that it is possible to access usb module here.
 985          * Don't accesses to it.
 986          * The accesse will be enable after "usbhsg_start"
 987          */
 988
 989         /*
 990          * register itself
 991          */
 992         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
 993
 994         /* init gpriv */
 995         gpriv->mod.name         = "gadget";
 996         gpriv->mod.start        = usbhsg_start;
 997         gpriv->mod.stop         = usbhsg_stop;
 998         gpriv->uep              = uep;
 999         gpriv->uep_size         = pipe_size;
1000         usbhsg_status_init(gpriv);
1001
1002         /*
1003          * init gadget
1004          */
1005         gpriv->gadget.dev.parent        = dev;
1006         gpriv->gadget.name              = "renesas_usbhs_udc";
1007         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1008         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
1009
1010         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1011
1012         /*
1013          * init usb_ep
1014          */
1015         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1016                 uep->gpriv      = gpriv;
1017                 uep->pipe       = NULL;
1018                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1019
1020                 uep->ep.name            = uep->ep_name;
1021                 uep->ep.ops             = &usbhsg_ep_ops;
1022                 INIT_LIST_HEAD(&uep->ep.ep_list);
1023
1024                 /* init DCP */
1025                 if (usbhsg_is_dcp(uep)) {
1026                         gpriv->gadget.ep0 = &uep->ep;
1027                         usb_ep_set_maxpacket_limit(&uep->ep, 64);
1028                 }
1029                 /* init normal pipe */
1030                 else {
1031                         usb_ep_set_maxpacket_limit(&uep->ep, 512);
1032                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1033                 }
1034         }
1035
1036         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1037         if (ret)
1038                 goto err_add_udc;
1039
1040
1041         dev_info(dev, "gadget probed\n");
1042
1043         return 0;
1044
1045 err_add_udc:
1046         kfree(gpriv->uep);
1047
1048 usbhs_mod_gadget_probe_err_gpriv:
1049         kfree(gpriv);
1050
1051         return ret;
1052 }
1053
1054 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1055 {
1056         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1057
1058         usb_del_gadget_udc(&gpriv->gadget);
1059
1060         kfree(gpriv->uep);
1061         kfree(gpriv);
1062 }