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 <linux/usb/otg.h>
  25 #include "common.h"
  26
  27 /*
  28  *              struct
  29  */
  30 struct usbhsg_request {
  31         struct usb_request      req;
  32         struct usbhs_pkt        pkt;
  33 };
  34
  35 #define EP_NAME_SIZE 8
  36 struct usbhsg_gpriv;
  37 struct usbhsg_uep {
  38         struct usb_ep            ep;
  39         struct usbhs_pipe       *pipe;
  40
  41         char ep_name[EP_NAME_SIZE];
  42
  43         struct usbhsg_gpriv *gpriv;
  44 };
  45
  46 struct usbhsg_gpriv {
  47         struct usb_gadget        gadget;
  48         struct usbhs_mod         mod;
  49
  50         struct usbhsg_uep       *uep;
  51         int                      uep_size;
  52
  53         struct usb_gadget_driver        *driver;
  54         struct usb_phy          *transceiver;
  55         bool                     vbus_active;
  56
  57         u32     status;
  58 #define USBHSG_STATUS_STARTED           (1 << 0)
  59 #define USBHSG_STATUS_REGISTERD         (1 << 1)
  60 #define USBHSG_STATUS_WEDGE             (1 << 2)
  61 #define USBHSG_STATUS_SELF_POWERED      (1 << 3)
  62 #define USBHSG_STATUS_SOFT_CONNECT      (1 << 4)
  63 };
  64
  65 struct usbhsg_recip_handle {
  66         char *name;
  67         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  68                       struct usb_ctrlrequest *ctrl);
  69         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  70                          struct usb_ctrlrequest *ctrl);
  71         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  72                         struct usb_ctrlrequest *ctrl);
  73 };
  74
  75 /*
  76  *              macro
  77  */
  78 #define usbhsg_priv_to_gpriv(priv)                      \
  79         container_of(                                   \
  80                 usbhs_mod_get(priv, USBHS_GADGET),      \
  81                 struct usbhsg_gpriv, mod)
  82
  83 #define __usbhsg_for_each_uep(start, pos, g, i) \
  84         for ((i) = start;                                       \
  85              ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
  86              (i)++)
  87
  88 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  89         __usbhsg_for_each_uep(1, pos, gpriv, i)
  90
  91 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  92         __usbhsg_for_each_uep(0, pos, gpriv, i)
  93
  94 #define usbhsg_gadget_to_gpriv(g)\
  95         container_of(g, struct usbhsg_gpriv, gadget)
  96
  97 #define usbhsg_req_to_ureq(r)\
  98         container_of(r, struct usbhsg_request, req)
  99
 100 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
 101 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
 102 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
 103 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
 104 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
 105 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 106 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 107 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 108 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 109
 110 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
 111 #define usbhsg_pkt_to_ureq(i)   \
 112         container_of(i, struct usbhsg_request, pkt)
 113
 114 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 115
 116 /* status */
 117 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 118 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 119 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 120 #define usbhsg_status_has(gp, b) (gp->status &   b)
 121
 122 /*
 123  *              queue push/pop
 124  */
 125 static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
 126                                struct usbhsg_request *ureq,
 127                                int status)
 128 {
 129         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 130         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 131         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 132         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 133
 134         if (pipe)
 135                 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 136
 137         ureq->req.status = status;
 138         spin_unlock(usbhs_priv_to_lock(priv));
 139         usb_gadget_giveback_request(&uep->ep, &ureq->req);
 140         spin_lock(usbhs_priv_to_lock(priv));
 141 }
 142
 143 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 144                              struct usbhsg_request *ureq,
 145                              int status)
 146 {
 147         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 148         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 149         unsigned long flags;
 150
 151         usbhs_lock(priv, flags);
 152         __usbhsg_queue_pop(uep, ureq, status);
 153         usbhs_unlock(priv, flags);
 154 }
 155
 156 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 157 {
 158         struct usbhs_pipe *pipe = pkt->pipe;
 159         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 160         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 161         unsigned long flags;
 162
 163         ureq->req.actual = pkt->actual;
 164
 165         usbhs_lock(priv, flags);
 166         if (uep)
 167                 __usbhsg_queue_pop(uep, ureq, 0);
 168         usbhs_unlock(priv, flags);
 169 }
 170
 171 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 172                               struct usbhsg_request *ureq)
 173 {
 174         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 175         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 176         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 177         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 178         struct usb_request *req = &ureq->req;
 179
 180         req->actual = 0;
 181         req->status = -EINPROGRESS;
 182         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
 183                        req->buf, req->length, req->zero, -1);
 184         usbhs_pkt_start(pipe);
 185
 186         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 187                 usbhs_pipe_number(pipe),
 188                 req->length);
 189 }
 190
 191 /*
 192  *              dma map/unmap
 193  */
 194 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
 195                                int map)
 196 {
 197         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 198         struct usb_request *req = &ureq->req;
 199         struct usbhs_pipe *pipe = pkt->pipe;
 200         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 201         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 202         enum dma_data_direction dir;
 203         int ret = 0;
 204
 205         dir = usbhs_pipe_is_dir_host(pipe);
 206
 207         if (map) {
 208                 /* it can not use scatter/gather */
 209                 WARN_ON(req->num_sgs);
 210
 211                 ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
 212                 if (ret < 0)
 213                         return ret;
 214
 215                 pkt->dma = req->dma;
 216         } else {
 217                 usb_gadget_unmap_request(&gpriv->gadget, req, dir);
 218         }
 219
 220         return ret;
 221 }
 222
 223 /*
 224  *              USB_TYPE_STANDARD / clear feature functions
 225  */
 226 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 227                                                  struct usbhsg_uep *uep,
 228                                                  struct usb_ctrlrequest *ctrl)
 229 {
 230         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 231         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 232         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 233
 234         usbhs_dcp_control_transfer_done(pipe);
 235
 236         return 0;
 237 }
 238
 239 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 240                                                    struct usbhsg_uep *uep,
 241                                                    struct usb_ctrlrequest *ctrl)
 242 {
 243         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 244         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 245
 246         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 247                 usbhs_pipe_disable(pipe);
 248                 usbhs_pipe_sequence_data0(pipe);
 249                 usbhs_pipe_enable(pipe);
 250         }
 251
 252         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 253
 254         usbhs_pkt_start(pipe);
 255
 256         return 0;
 257 }
 258
 259 static struct usbhsg_recip_handle req_clear_feature = {
 260         .name           = "clear feature",
 261         .device         = usbhsg_recip_handler_std_control_done,
 262         .interface      = usbhsg_recip_handler_std_control_done,
 263         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 264 };
 265
 266 /*
 267  *              USB_TYPE_STANDARD / set feature functions
 268  */
 269 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
 270                                                  struct usbhsg_uep *uep,
 271                                                  struct usb_ctrlrequest *ctrl)
 272 {
 273         switch (le16_to_cpu(ctrl->wValue)) {
 274         case USB_DEVICE_TEST_MODE:
 275                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 276                 udelay(100);
 277                 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
 278                 break;
 279         default:
 280                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 281                 break;
 282         }
 283
 284         return 0;
 285 }
 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 static struct usbhsg_recip_handle req_set_feature = {
 301         .name           = "set feature",
 302         .device         = usbhsg_recip_handler_std_set_device,
 303         .interface      = usbhsg_recip_handler_std_control_done,
 304         .endpoint       = usbhsg_recip_handler_std_set_endpoint,
 305 };
 306
 307 /*
 308  *              USB_TYPE_STANDARD / get status functions
 309  */
 310 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
 311                                          struct usb_request *req)
 312 {
 313         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 314
 315         /* free allocated recip-buffer/usb_request */
 316         kfree(ureq->pkt.buf);
 317         usb_ep_free_request(ep, req);
 318 }
 319
 320 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
 321                                        unsigned short status)
 322 {
 323         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 324         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 325         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 326         struct usb_request *req;
 327         unsigned short *buf;
 328
 329         /* alloc new usb_request for recip */
 330         req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
 331         if (!req) {
 332                 dev_err(dev, "recip request allocation fail\n");
 333                 return;
 334         }
 335
 336         /* alloc recip data buffer */
 337         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
 338         if (!buf) {
 339                 usb_ep_free_request(&dcp->ep, req);
 340                 dev_err(dev, "recip data allocation fail\n");
 341                 return;
 342         }
 343
 344         /* recip data is status */
 345         *buf = cpu_to_le16(status);
 346
 347         /* allocated usb_request/buffer will be freed */
 348         req->complete   = __usbhsg_recip_send_complete;
 349         req->buf        = buf;
 350         req->length     = sizeof(*buf);
 351         req->zero       = 0;
 352
 353         /* push packet */
 354         pipe->handler = &usbhs_fifo_pio_push_handler;
 355         usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
 356 }
 357
 358 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
 359                                                struct usbhsg_uep *uep,
 360                                                struct usb_ctrlrequest *ctrl)
 361 {
 362         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 363         unsigned short status = 0;
 364
 365         if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
 366                 status = 1 << USB_DEVICE_SELF_POWERED;
 367
 368         __usbhsg_recip_send_status(gpriv, status);
 369
 370         return 0;
 371 }
 372
 373 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
 374                                                   struct usbhsg_uep *uep,
 375                                                   struct usb_ctrlrequest *ctrl)
 376 {
 377         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 378         unsigned short status = 0;
 379
 380         __usbhsg_recip_send_status(gpriv, status);
 381
 382         return 0;
 383 }
 384
 385 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
 386                                                  struct usbhsg_uep *uep,
 387                                                  struct usb_ctrlrequest *ctrl)
 388 {
 389         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 390         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 391         unsigned short status = 0;
 392
 393         if (usbhs_pipe_is_stall(pipe))
 394                 status = 1 << USB_ENDPOINT_HALT;
 395
 396         __usbhsg_recip_send_status(gpriv, status);
 397
 398         return 0;
 399 }
 400
 401 static struct usbhsg_recip_handle req_get_status = {
 402         .name           = "get status",
 403         .device         = usbhsg_recip_handler_std_get_device,
 404         .interface      = usbhsg_recip_handler_std_get_interface,
 405         .endpoint       = usbhsg_recip_handler_std_get_endpoint,
 406 };
 407
 408 /*
 409  *              USB_TYPE handler
 410  */
 411 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 412                                    struct usbhsg_recip_handle *handler,
 413                                    struct usb_ctrlrequest *ctrl)
 414 {
 415         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 416         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 417         struct usbhsg_uep *uep;
 418         struct usbhs_pipe *pipe;
 419         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 420         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 421         int ret = 0;
 422         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 423                     struct usb_ctrlrequest *ctrl);
 424         char *msg;
 425
 426         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 427         pipe = usbhsg_uep_to_pipe(uep);
 428         if (!pipe) {
 429                 dev_err(dev, "wrong recip request\n");
 430                 return -EINVAL;
 431         }
 432
 433         switch (recip) {
 434         case USB_RECIP_DEVICE:
 435                 msg     = "DEVICE";
 436                 func    = handler->device;
 437                 break;
 438         case USB_RECIP_INTERFACE:
 439                 msg     = "INTERFACE";
 440                 func    = handler->interface;
 441                 break;
 442         case USB_RECIP_ENDPOINT:
 443                 msg     = "ENDPOINT";
 444                 func    = handler->endpoint;
 445                 break;
 446         default:
 447                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 448                 func = NULL;
 449                 ret = -EINVAL;
 450         }
 451
 452         if (func) {
 453                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 454                 ret = func(priv, uep, ctrl);
 455         }
 456
 457         return ret;
 458 }
 459
 460 /*
 461  *              irq functions
 462  *
 463  * it will be called from usbhs_interrupt
 464  */
 465 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 466                                 struct usbhs_irq_state *irq_state)
 467 {
 468         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 469         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 470
 471         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
 472
 473         dev_dbg(dev, "state = %x : speed : %d\n",
 474                 usbhs_status_get_device_state(irq_state),
 475                 gpriv->gadget.speed);
 476
 477         return 0;
 478 }
 479
 480 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 481                                  struct usbhs_irq_state *irq_state)
 482 {
 483         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 484         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 485         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 486         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 487         struct usb_ctrlrequest ctrl;
 488         struct usbhsg_recip_handle *recip_handler = NULL;
 489         int stage = usbhs_status_get_ctrl_stage(irq_state);
 490         int ret = 0;
 491
 492         dev_dbg(dev, "stage = %d\n", stage);
 493
 494         /*
 495          * see Manual
 496          *
 497          *  "Operation"
 498          *  - "Interrupt Function"
 499          *    - "Control Transfer Stage Transition Interrupt"
 500          *      - Fig. "Control Transfer Stage Transitions"
 501          */
 502
 503         switch (stage) {
 504         case READ_DATA_STAGE:
 505                 pipe->handler = &usbhs_fifo_pio_push_handler;
 506                 break;
 507         case WRITE_DATA_STAGE:
 508                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 509                 break;
 510         case NODATA_STATUS_STAGE:
 511                 pipe->handler = &usbhs_ctrl_stage_end_handler;
 512                 break;
 513         case READ_STATUS_STAGE:
 514         case WRITE_STATUS_STAGE:
 515                 usbhs_dcp_control_transfer_done(pipe);
 516         default:
 517                 return ret;
 518         }
 519
 520         /*
 521          * get usb request
 522          */
 523         usbhs_usbreq_get_val(priv, &ctrl);
 524
 525         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 526         case USB_TYPE_STANDARD:
 527                 switch (ctrl.bRequest) {
 528                 case USB_REQ_CLEAR_FEATURE:
 529                         recip_handler = &req_clear_feature;
 530                         break;
 531                 case USB_REQ_SET_FEATURE:
 532                         recip_handler = &req_set_feature;
 533                         break;
 534                 case USB_REQ_GET_STATUS:
 535                         recip_handler = &req_get_status;
 536                         break;
 537                 }
 538         }
 539
 540         /*
 541          * setup stage / run recip
 542          */
 543         if (recip_handler)
 544                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 545         else
 546                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 547
 548         if (ret < 0)
 549                 usbhs_pipe_stall(pipe);
 550
 551         return ret;
 552 }
 553
 554 /*
 555  *
 556  *              usb_dcp_ops
 557  *
 558  */
 559 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 560 {
 561         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 562         struct usbhs_pkt *pkt;
 563
 564         while (1) {
 565                 pkt = usbhs_pkt_pop(pipe, NULL);
 566                 if (!pkt)
 567                         break;
 568
 569                 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
 570         }
 571
 572         usbhs_pipe_disable(pipe);
 573
 574         return 0;
 575 }
 576
 577 /*
 578  *
 579  *              usb_ep_ops
 580  *
 581  */
 582 static int usbhsg_ep_enable(struct usb_ep *ep,
 583                          const struct usb_endpoint_descriptor *desc)
 584 {
 585         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 586         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 587         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 588         struct usbhs_pipe *pipe;
 589         int ret = -EIO;
 590
 591         /*
 592          * if it already have pipe,
 593          * nothing to do
 594          */
 595         if (uep->pipe) {
 596                 usbhs_pipe_clear(uep->pipe);
 597                 usbhs_pipe_sequence_data0(uep->pipe);
 598                 return 0;
 599         }
 600
 601         pipe = usbhs_pipe_malloc(priv,
 602                                  usb_endpoint_type(desc),
 603                                  usb_endpoint_dir_in(desc));
 604         if (pipe) {
 605                 uep->pipe               = pipe;
 606                 pipe->mod_private       = uep;
 607
 608                 /* set epnum / maxp */
 609                 usbhs_pipe_config_update(pipe, 0,
 610                                          usb_endpoint_num(desc),
 611                                          usb_endpoint_maxp(desc));
 612
 613                 /*
 614                  * usbhs_fifo_dma_push/pop_handler try to
 615                  * use dmaengine if possible.
 616                  * It will use pio handler if impossible.
 617                  */
 618                 if (usb_endpoint_dir_in(desc))
 619                         pipe->handler = &usbhs_fifo_dma_push_handler;
 620                 else
 621                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 622
 623                 ret = 0;
 624         }
 625
 626         return ret;
 627 }
 628
 629 static int usbhsg_ep_disable(struct usb_ep *ep)
 630 {
 631         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 632         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 633
 634         if (!pipe)
 635                 return -EINVAL;
 636
 637         usbhsg_pipe_disable(uep);
 638         usbhs_pipe_free(pipe);
 639
 640         uep->pipe->mod_private  = NULL;
 641         uep->pipe               = NULL;
 642
 643         return 0;
 644 }
 645
 646 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 647                                                    gfp_t gfp_flags)
 648 {
 649         struct usbhsg_request *ureq;
 650
 651         ureq = kzalloc(sizeof *ureq, gfp_flags);
 652         if (!ureq)
 653                 return NULL;
 654
 655         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 656
 657         return &ureq->req;
 658 }
 659
 660 static void usbhsg_ep_free_request(struct usb_ep *ep,
 661                                    struct usb_request *req)
 662 {
 663         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 664
 665         WARN_ON(!list_empty(&ureq->pkt.node));
 666         kfree(ureq);
 667 }
 668
 669 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 670                           gfp_t gfp_flags)
 671 {
 672         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 673         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 674         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 675         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 676
 677         /* param check */
 678         if (usbhsg_is_not_connected(gpriv)      ||
 679             unlikely(!gpriv->driver)            ||
 680             unlikely(!pipe))
 681                 return -ESHUTDOWN;
 682
 683         usbhsg_queue_push(uep, ureq);
 684
 685         return 0;
 686 }
 687
 688 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 689 {
 690         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 691         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 692         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 693
 694         if (pipe)
 695                 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 696
 697         /*
 698          * To dequeue a request, this driver should call the usbhsg_queue_pop()
 699          * even if the pipe is NULL.
 700          */
 701         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 702
 703         return 0;
 704 }
 705
 706 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 707 {
 708         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 709         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 710         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 711         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 712         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 713         unsigned long flags;
 714
 715         usbhsg_pipe_disable(uep);
 716
 717         dev_dbg(dev, "set halt %d (pipe %d)\n",
 718                 halt, usbhs_pipe_number(pipe));
 719
 720         /********************  spin lock ********************/
 721         usbhs_lock(priv, flags);
 722
 723         if (halt)
 724                 usbhs_pipe_stall(pipe);
 725         else
 726                 usbhs_pipe_disable(pipe);
 727
 728         if (halt && wedge)
 729                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 730         else
 731                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 732
 733         usbhs_unlock(priv, flags);
 734         /********************  spin unlock ******************/
 735
 736         return 0;
 737 }
 738
 739 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 740 {
 741         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 742 }
 743
 744 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 745 {
 746         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 747 }
 748
 749 static struct usb_ep_ops usbhsg_ep_ops = {
 750         .enable         = usbhsg_ep_enable,
 751         .disable        = usbhsg_ep_disable,
 752
 753         .alloc_request  = usbhsg_ep_alloc_request,
 754         .free_request   = usbhsg_ep_free_request,
 755
 756         .queue          = usbhsg_ep_queue,
 757         .dequeue        = usbhsg_ep_dequeue,
 758
 759         .set_halt       = usbhsg_ep_set_halt,
 760         .set_wedge      = usbhsg_ep_set_wedge,
 761 };
 762
 763 /*
 764  *              pullup control
 765  */
 766 static int usbhsg_can_pullup(struct usbhs_priv *priv)
 767 {
 768         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 769
 770         return gpriv->driver &&
 771                usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 772 }
 773
 774 static void usbhsg_update_pullup(struct usbhs_priv *priv)
 775 {
 776         if (usbhsg_can_pullup(priv))
 777                 usbhs_sys_function_pullup(priv, 1);
 778         else
 779                 usbhs_sys_function_pullup(priv, 0);
 780 }
 781
 782 /*
 783  *              usb module start/end
 784  */
 785 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 786 {
 787         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 788         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 789         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 790         struct device *dev = usbhs_priv_to_dev(priv);
 791         unsigned long flags;
 792         int ret = 0;
 793
 794         /********************  spin lock ********************/
 795         usbhs_lock(priv, flags);
 796
 797         usbhsg_status_set(gpriv, status);
 798         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 799               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 800                 ret = -1; /* not ready */
 801
 802         usbhs_unlock(priv, flags);
 803         /********************  spin unlock ********************/
 804
 805         if (ret < 0)
 806                 return 0; /* not ready is not error */
 807
 808         /*
 809          * enable interrupt and systems if ready
 810          */
 811         dev_dbg(dev, "start gadget\n");
 812
 813         /*
 814          * pipe initialize and enable DCP
 815          */
 816         usbhs_fifo_init(priv);
 817         usbhs_pipe_init(priv,
 818                         usbhsg_dma_map_ctrl);
 819
 820         /* dcp init instead of usbhsg_ep_enable() */
 821         dcp->pipe               = usbhs_dcp_malloc(priv);
 822         dcp->pipe->mod_private  = dcp;
 823         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 824
 825         /*
 826          * system config enble
 827          * - HI speed
 828          * - function
 829          * - usb module
 830          */
 831         usbhs_sys_function_ctrl(priv, 1);
 832         usbhsg_update_pullup(priv);
 833
 834         /*
 835          * enable irq callback
 836          */
 837         mod->irq_dev_state      = usbhsg_irq_dev_state;
 838         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 839         usbhs_irq_callback_update(priv, mod);
 840
 841         return 0;
 842 }
 843
 844 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 845 {
 846         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 847         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 848         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 849         struct device *dev = usbhs_priv_to_dev(priv);
 850         unsigned long flags;
 851         int ret = 0;
 852
 853         /********************  spin lock ********************/
 854         usbhs_lock(priv, flags);
 855
 856         usbhsg_status_clr(gpriv, status);
 857         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 858             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 859                 ret = -1; /* already done */
 860
 861         usbhs_unlock(priv, flags);
 862         /********************  spin unlock ********************/
 863
 864         if (ret < 0)
 865                 return 0; /* already done is not error */
 866
 867         /*
 868          * disable interrupt and systems if 1st try
 869          */
 870         usbhs_fifo_quit(priv);
 871
 872         /* disable all irq */
 873         mod->irq_dev_state      = NULL;
 874         mod->irq_ctrl_stage     = NULL;
 875         usbhs_irq_callback_update(priv, mod);
 876
 877         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 878
 879         /* disable sys */
 880         usbhs_sys_set_test_mode(priv, 0);
 881         usbhs_sys_function_ctrl(priv, 0);
 882
 883         usbhsg_ep_disable(&dcp->ep);
 884
 885         dev_dbg(dev, "stop gadget\n");
 886
 887         return 0;
 888 }
 889
 890 /*
 891  * VBUS provided by the PHY
 892  */
 893 static int usbhsm_phy_get_vbus(struct platform_device *pdev)
 894 {
 895         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 896         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 897
 898         return  gpriv->vbus_active;
 899 }
 900
 901 static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
 902 {
 903         struct usbhs_mod_info *info = &priv->mod_info;
 904
 905         info->irq_vbus          = NULL;
 906         priv->pfunc.get_vbus    = usbhsm_phy_get_vbus;
 907
 908         usbhs_irq_callback_update(priv, NULL);
 909 }
 910
 911 /*
 912  *
 913  *              linux usb function
 914  *
 915  */
 916 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 917                 struct usb_gadget_driver *driver)
 918 {
 919         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 920         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 921         struct device *dev = usbhs_priv_to_dev(priv);
 922         int ret;
 923
 924         if (!driver             ||
 925             !driver->setup      ||
 926             driver->max_speed < USB_SPEED_FULL)
 927                 return -EINVAL;
 928
 929         /* connect to bus through transceiver */
 930         if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
 931                 ret = otg_set_peripheral(gpriv->transceiver->otg,
 932                                         &gpriv->gadget);
 933                 if (ret) {
 934                         dev_err(dev, "%s: can't bind to transceiver\n",
 935                                 gpriv->gadget.name);
 936                         return ret;
 937                 }
 938
 939                 /* get vbus using phy versions */
 940                 usbhs_mod_phy_mode(priv);
 941         }
 942
 943         /* first hook up the driver ... */
 944         gpriv->driver = driver;
 945
 946         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 947 }
 948
 949 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
 950 {
 951         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 952         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 953
 954         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 955
 956         if (!IS_ERR_OR_NULL(gpriv->transceiver))
 957                 otg_set_peripheral(gpriv->transceiver->otg, NULL);
 958
 959         gpriv->driver = NULL;
 960
 961         return 0;
 962 }
 963
 964 /*
 965  *              usb gadget ops
 966  */
 967 static int usbhsg_get_frame(struct usb_gadget *gadget)
 968 {
 969         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 970         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 971
 972         return usbhs_frame_get_num(priv);
 973 }
 974
 975 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
 976 {
 977         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 978         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 979         unsigned long flags;
 980
 981         usbhs_lock(priv, flags);
 982         if (is_on)
 983                 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 984         else
 985                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 986         usbhsg_update_pullup(priv);
 987         usbhs_unlock(priv, flags);
 988
 989         return 0;
 990 }
 991
 992 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
 993 {
 994         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 995
 996         if (is_self)
 997                 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
 998         else
 999                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1000
1001         gadget->is_selfpowered = (is_self != 0);
1002
1003         return 0;
1004 }
1005
1006 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1007 {
1008         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1009         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1010         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1011
1012         gpriv->vbus_active = !!is_active;
1013
1014         renesas_usbhs_call_notify_hotplug(pdev);
1015
1016         return 0;
1017 }
1018
1019 static const struct usb_gadget_ops usbhsg_gadget_ops = {
1020         .get_frame              = usbhsg_get_frame,
1021         .set_selfpowered        = usbhsg_set_selfpowered,
1022         .udc_start              = usbhsg_gadget_start,
1023         .udc_stop               = usbhsg_gadget_stop,
1024         .pullup                 = usbhsg_pullup,
1025         .vbus_session           = usbhsg_vbus_session,
1026 };
1027
1028 static int usbhsg_start(struct usbhs_priv *priv)
1029 {
1030         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1031 }
1032
1033 static int usbhsg_stop(struct usbhs_priv *priv)
1034 {
1035         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1036
1037         /* cable disconnect */
1038         if (gpriv->driver &&
1039             gpriv->driver->disconnect)
1040                 gpriv->driver->disconnect(&gpriv->gadget);
1041
1042         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1043 }
1044
1045 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1046 {
1047         struct usbhsg_gpriv *gpriv;
1048         struct usbhsg_uep *uep;
1049         struct device *dev = usbhs_priv_to_dev(priv);
1050         struct renesas_usbhs_driver_pipe_config *pipe_configs =
1051                                         usbhs_get_dparam(priv, pipe_configs);
1052         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1053         int i;
1054         int ret;
1055
1056         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1057         if (!gpriv) {
1058                 dev_err(dev, "Could not allocate gadget priv\n");
1059                 return -ENOMEM;
1060         }
1061
1062         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1063         if (!uep) {
1064                 dev_err(dev, "Could not allocate ep\n");
1065                 ret = -ENOMEM;
1066                 goto usbhs_mod_gadget_probe_err_gpriv;
1067         }
1068
1069         gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1070         dev_info(dev, "%stransceiver found\n",
1071                  gpriv->transceiver ? "" : "no ");
1072
1073         /*
1074          * CAUTION
1075          *
1076          * There is no guarantee that it is possible to access usb module here.
1077          * Don't accesses to it.
1078          * The accesse will be enable after "usbhsg_start"
1079          */
1080
1081         /*
1082          * register itself
1083          */
1084         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1085
1086         /* init gpriv */
1087         gpriv->mod.name         = "gadget";
1088         gpriv->mod.start        = usbhsg_start;
1089         gpriv->mod.stop         = usbhsg_stop;
1090         gpriv->uep              = uep;
1091         gpriv->uep_size         = pipe_size;
1092         usbhsg_status_init(gpriv);
1093
1094         /*
1095          * init gadget
1096          */
1097         gpriv->gadget.dev.parent        = dev;
1098         gpriv->gadget.name              = "renesas_usbhs_udc";
1099         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1100         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
1101
1102         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1103
1104         /*
1105          * init usb_ep
1106          */
1107         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1108                 uep->gpriv      = gpriv;
1109                 uep->pipe       = NULL;
1110                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1111
1112                 uep->ep.name            = uep->ep_name;
1113                 uep->ep.ops             = &usbhsg_ep_ops;
1114                 INIT_LIST_HEAD(&uep->ep.ep_list);
1115
1116                 /* init DCP */
1117                 if (usbhsg_is_dcp(uep)) {
1118                         gpriv->gadget.ep0 = &uep->ep;
1119                         usb_ep_set_maxpacket_limit(&uep->ep, 64);
1120                         uep->ep.caps.type_control = true;
1121                 } else {
1122                         /* init normal pipe */
1123                         if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1124                                 uep->ep.caps.type_iso = true;
1125                         if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1126                                 uep->ep.caps.type_bulk = true;
1127                         if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1128                                 uep->ep.caps.type_int = true;
1129                         usb_ep_set_maxpacket_limit(&uep->ep,
1130                                                    pipe_configs[i].bufsize);
1131                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1132                 }
1133                 uep->ep.caps.dir_in = true;
1134                 uep->ep.caps.dir_out = true;
1135         }
1136
1137         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1138         if (ret)
1139                 goto err_add_udc;
1140
1141
1142         dev_info(dev, "gadget probed\n");
1143
1144         return 0;
1145
1146 err_add_udc:
1147         kfree(gpriv->uep);
1148
1149 usbhs_mod_gadget_probe_err_gpriv:
1150         kfree(gpriv);
1151
1152         return ret;
1153 }
1154
1155 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1156 {
1157         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1158
1159         usb_del_gadget_udc(&gpriv->gadget);
1160
1161         kfree(gpriv->uep);
1162         kfree(gpriv);
1163 }