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         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 135
 136         ureq->req.status = status;
 137         spin_unlock(usbhs_priv_to_lock(priv));
 138         usb_gadget_giveback_request(&uep->ep, &ureq->req);
 139         spin_lock(usbhs_priv_to_lock(priv));
 140 }
 141
 142 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 143                              struct usbhsg_request *ureq,
 144                              int status)
 145 {
 146         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 147         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 148         unsigned long flags;
 149
 150         usbhs_lock(priv, flags);
 151         __usbhsg_queue_pop(uep, ureq, status);
 152         usbhs_unlock(priv, flags);
 153 }
 154
 155 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 156 {
 157         struct usbhs_pipe *pipe = pkt->pipe;
 158         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 159         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 160
 161         ureq->req.actual = pkt->actual;
 162
 163         usbhsg_queue_pop(uep, ureq, 0);
 164 }
 165
 166 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 167                               struct usbhsg_request *ureq)
 168 {
 169         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 170         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 171         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 172         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 173         struct usb_request *req = &ureq->req;
 174
 175         req->actual = 0;
 176         req->status = -EINPROGRESS;
 177         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
 178                        req->buf, req->length, req->zero, -1);
 179         usbhs_pkt_start(pipe);
 180
 181         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 182                 usbhs_pipe_number(pipe),
 183                 req->length);
 184 }
 185
 186 /*
 187  *              dma map/unmap
 188  */
 189 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 190 {
 191         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 192         struct usb_request *req = &ureq->req;
 193         struct usbhs_pipe *pipe = pkt->pipe;
 194         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 195         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 196         enum dma_data_direction dir;
 197         int ret = 0;
 198
 199         dir = usbhs_pipe_is_dir_host(pipe);
 200
 201         if (map) {
 202                 /* it can not use scatter/gather */
 203                 WARN_ON(req->num_sgs);
 204
 205                 ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
 206                 if (ret < 0)
 207                         return ret;
 208
 209                 pkt->dma = req->dma;
 210         } else {
 211                 usb_gadget_unmap_request(&gpriv->gadget, req, dir);
 212         }
 213
 214         return ret;
 215 }
 216
 217 /*
 218  *              USB_TYPE_STANDARD / clear feature functions
 219  */
 220 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 221                                                  struct usbhsg_uep *uep,
 222                                                  struct usb_ctrlrequest *ctrl)
 223 {
 224         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 225         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 226         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 227
 228         usbhs_dcp_control_transfer_done(pipe);
 229
 230         return 0;
 231 }
 232
 233 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 234                                                    struct usbhsg_uep *uep,
 235                                                    struct usb_ctrlrequest *ctrl)
 236 {
 237         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 238         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 239
 240         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 241                 usbhs_pipe_disable(pipe);
 242                 usbhs_pipe_sequence_data0(pipe);
 243                 usbhs_pipe_enable(pipe);
 244         }
 245
 246         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 247
 248         usbhs_pkt_start(pipe);
 249
 250         return 0;
 251 }
 252
 253 static struct usbhsg_recip_handle req_clear_feature = {
 254         .name           = "clear feature",
 255         .device         = usbhsg_recip_handler_std_control_done,
 256         .interface      = usbhsg_recip_handler_std_control_done,
 257         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 258 };
 259
 260 /*
 261  *              USB_TYPE_STANDARD / set feature functions
 262  */
 263 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
 264                                                  struct usbhsg_uep *uep,
 265                                                  struct usb_ctrlrequest *ctrl)
 266 {
 267         switch (le16_to_cpu(ctrl->wValue)) {
 268         case USB_DEVICE_TEST_MODE:
 269                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 270                 udelay(100);
 271                 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
 272                 break;
 273         default:
 274                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 275                 break;
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
 282                                                  struct usbhsg_uep *uep,
 283                                                  struct usb_ctrlrequest *ctrl)
 284 {
 285         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 286
 287         usbhs_pipe_stall(pipe);
 288
 289         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 290
 291         return 0;
 292 }
 293
 294 static struct usbhsg_recip_handle req_set_feature = {
 295         .name           = "set feature",
 296         .device         = usbhsg_recip_handler_std_set_device,
 297         .interface      = usbhsg_recip_handler_std_control_done,
 298         .endpoint       = usbhsg_recip_handler_std_set_endpoint,
 299 };
 300
 301 /*
 302  *              USB_TYPE_STANDARD / get status functions
 303  */
 304 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
 305                                          struct usb_request *req)
 306 {
 307         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 308
 309         /* free allocated recip-buffer/usb_request */
 310         kfree(ureq->pkt.buf);
 311         usb_ep_free_request(ep, req);
 312 }
 313
 314 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
 315                                        unsigned short status)
 316 {
 317         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 318         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 319         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 320         struct usb_request *req;
 321         unsigned short *buf;
 322
 323         /* alloc new usb_request for recip */
 324         req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
 325         if (!req) {
 326                 dev_err(dev, "recip request allocation fail\n");
 327                 return;
 328         }
 329
 330         /* alloc recip data buffer */
 331         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
 332         if (!buf) {
 333                 usb_ep_free_request(&dcp->ep, req);
 334                 dev_err(dev, "recip data allocation fail\n");
 335                 return;
 336         }
 337
 338         /* recip data is status */
 339         *buf = cpu_to_le16(status);
 340
 341         /* allocated usb_request/buffer will be freed */
 342         req->complete   = __usbhsg_recip_send_complete;
 343         req->buf        = buf;
 344         req->length     = sizeof(*buf);
 345         req->zero       = 0;
 346
 347         /* push packet */
 348         pipe->handler = &usbhs_fifo_pio_push_handler;
 349         usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
 350 }
 351
 352 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
 353                                                struct usbhsg_uep *uep,
 354                                                struct usb_ctrlrequest *ctrl)
 355 {
 356         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 357         unsigned short status = 0;
 358
 359         if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
 360                 status = 1 << USB_DEVICE_SELF_POWERED;
 361
 362         __usbhsg_recip_send_status(gpriv, status);
 363
 364         return 0;
 365 }
 366
 367 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
 368                                                   struct usbhsg_uep *uep,
 369                                                   struct usb_ctrlrequest *ctrl)
 370 {
 371         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 372         unsigned short status = 0;
 373
 374         __usbhsg_recip_send_status(gpriv, status);
 375
 376         return 0;
 377 }
 378
 379 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
 380                                                  struct usbhsg_uep *uep,
 381                                                  struct usb_ctrlrequest *ctrl)
 382 {
 383         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 384         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 385         unsigned short status = 0;
 386
 387         if (usbhs_pipe_is_stall(pipe))
 388                 status = 1 << USB_ENDPOINT_HALT;
 389
 390         __usbhsg_recip_send_status(gpriv, status);
 391
 392         return 0;
 393 }
 394
 395 static struct usbhsg_recip_handle req_get_status = {
 396         .name           = "get status",
 397         .device         = usbhsg_recip_handler_std_get_device,
 398         .interface      = usbhsg_recip_handler_std_get_interface,
 399         .endpoint       = usbhsg_recip_handler_std_get_endpoint,
 400 };
 401
 402 /*
 403  *              USB_TYPE handler
 404  */
 405 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 406                                    struct usbhsg_recip_handle *handler,
 407                                    struct usb_ctrlrequest *ctrl)
 408 {
 409         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 410         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 411         struct usbhsg_uep *uep;
 412         struct usbhs_pipe *pipe;
 413         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 414         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 415         int ret = 0;
 416         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 417                     struct usb_ctrlrequest *ctrl);
 418         char *msg;
 419
 420         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 421         pipe = usbhsg_uep_to_pipe(uep);
 422         if (!pipe) {
 423                 dev_err(dev, "wrong recip request\n");
 424                 return -EINVAL;
 425         }
 426
 427         switch (recip) {
 428         case USB_RECIP_DEVICE:
 429                 msg     = "DEVICE";
 430                 func    = handler->device;
 431                 break;
 432         case USB_RECIP_INTERFACE:
 433                 msg     = "INTERFACE";
 434                 func    = handler->interface;
 435                 break;
 436         case USB_RECIP_ENDPOINT:
 437                 msg     = "ENDPOINT";
 438                 func    = handler->endpoint;
 439                 break;
 440         default:
 441                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 442                 func = NULL;
 443                 ret = -EINVAL;
 444         }
 445
 446         if (func) {
 447                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 448                 ret = func(priv, uep, ctrl);
 449         }
 450
 451         return ret;
 452 }
 453
 454 /*
 455  *              irq functions
 456  *
 457  * it will be called from usbhs_interrupt
 458  */
 459 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 460                                 struct usbhs_irq_state *irq_state)
 461 {
 462         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 463         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 464
 465         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
 466
 467         dev_dbg(dev, "state = %x : speed : %d\n",
 468                 usbhs_status_get_device_state(irq_state),
 469                 gpriv->gadget.speed);
 470
 471         return 0;
 472 }
 473
 474 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 475                                  struct usbhs_irq_state *irq_state)
 476 {
 477         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 478         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 479         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 480         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 481         struct usb_ctrlrequest ctrl;
 482         struct usbhsg_recip_handle *recip_handler = NULL;
 483         int stage = usbhs_status_get_ctrl_stage(irq_state);
 484         int ret = 0;
 485
 486         dev_dbg(dev, "stage = %d\n", stage);
 487
 488         /*
 489          * see Manual
 490          *
 491          *  "Operation"
 492          *  - "Interrupt Function"
 493          *    - "Control Transfer Stage Transition Interrupt"
 494          *      - Fig. "Control Transfer Stage Transitions"
 495          */
 496
 497         switch (stage) {
 498         case READ_DATA_STAGE:
 499                 pipe->handler = &usbhs_fifo_pio_push_handler;
 500                 break;
 501         case WRITE_DATA_STAGE:
 502                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 503                 break;
 504         case NODATA_STATUS_STAGE:
 505                 pipe->handler = &usbhs_ctrl_stage_end_handler;
 506                 break;
 507         case READ_STATUS_STAGE:
 508         case WRITE_STATUS_STAGE:
 509                 usbhs_dcp_control_transfer_done(pipe);
 510         default:
 511                 return ret;
 512         }
 513
 514         /*
 515          * get usb request
 516          */
 517         usbhs_usbreq_get_val(priv, &ctrl);
 518
 519         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 520         case USB_TYPE_STANDARD:
 521                 switch (ctrl.bRequest) {
 522                 case USB_REQ_CLEAR_FEATURE:
 523                         recip_handler = &req_clear_feature;
 524                         break;
 525                 case USB_REQ_SET_FEATURE:
 526                         recip_handler = &req_set_feature;
 527                         break;
 528                 case USB_REQ_GET_STATUS:
 529                         recip_handler = &req_get_status;
 530                         break;
 531                 }
 532         }
 533
 534         /*
 535          * setup stage / run recip
 536          */
 537         if (recip_handler)
 538                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 539         else
 540                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 541
 542         if (ret < 0)
 543                 usbhs_pipe_stall(pipe);
 544
 545         return ret;
 546 }
 547
 548 /*
 549  *
 550  *              usb_dcp_ops
 551  *
 552  */
 553 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 554 {
 555         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 556         struct usbhs_pkt *pkt;
 557
 558         while (1) {
 559                 pkt = usbhs_pkt_pop(pipe, NULL);
 560                 if (!pkt)
 561                         break;
 562
 563                 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET);
 564         }
 565
 566         usbhs_pipe_disable(pipe);
 567
 568         return 0;
 569 }
 570
 571 /*
 572  *
 573  *              usb_ep_ops
 574  *
 575  */
 576 static int usbhsg_ep_enable(struct usb_ep *ep,
 577                          const struct usb_endpoint_descriptor *desc)
 578 {
 579         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 580         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 581         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 582         struct usbhs_pipe *pipe;
 583         int ret = -EIO;
 584
 585         /*
 586          * if it already have pipe,
 587          * nothing to do
 588          */
 589         if (uep->pipe) {
 590                 usbhs_pipe_clear(uep->pipe);
 591                 usbhs_pipe_sequence_data0(uep->pipe);
 592                 return 0;
 593         }
 594
 595         pipe = usbhs_pipe_malloc(priv,
 596                                  usb_endpoint_type(desc),
 597                                  usb_endpoint_dir_in(desc));
 598         if (pipe) {
 599                 uep->pipe               = pipe;
 600                 pipe->mod_private       = uep;
 601
 602                 /* set epnum / maxp */
 603                 usbhs_pipe_config_update(pipe, 0,
 604                                          usb_endpoint_num(desc),
 605                                          usb_endpoint_maxp(desc));
 606
 607                 /*
 608                  * usbhs_fifo_dma_push/pop_handler try to
 609                  * use dmaengine if possible.
 610                  * It will use pio handler if impossible.
 611                  */
 612                 if (usb_endpoint_dir_in(desc))
 613                         pipe->handler = &usbhs_fifo_dma_push_handler;
 614                 else
 615                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 616
 617                 ret = 0;
 618         }
 619
 620         return ret;
 621 }
 622
 623 static int usbhsg_ep_disable(struct usb_ep *ep)
 624 {
 625         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 626         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 627
 628         if (!pipe)
 629                 return -EINVAL;
 630
 631         usbhsg_pipe_disable(uep);
 632         usbhs_pipe_free(pipe);
 633
 634         uep->pipe->mod_private  = NULL;
 635         uep->pipe               = NULL;
 636
 637         return 0;
 638 }
 639
 640 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 641                                                    gfp_t gfp_flags)
 642 {
 643         struct usbhsg_request *ureq;
 644
 645         ureq = kzalloc(sizeof *ureq, gfp_flags);
 646         if (!ureq)
 647                 return NULL;
 648
 649         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 650
 651         return &ureq->req;
 652 }
 653
 654 static void usbhsg_ep_free_request(struct usb_ep *ep,
 655                                    struct usb_request *req)
 656 {
 657         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 658
 659         WARN_ON(!list_empty(&ureq->pkt.node));
 660         kfree(ureq);
 661 }
 662
 663 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 664                           gfp_t gfp_flags)
 665 {
 666         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 667         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 668         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 669         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 670
 671         /* param check */
 672         if (usbhsg_is_not_connected(gpriv)      ||
 673             unlikely(!gpriv->driver)            ||
 674             unlikely(!pipe))
 675                 return -ESHUTDOWN;
 676
 677         usbhsg_queue_push(uep, ureq);
 678
 679         return 0;
 680 }
 681
 682 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 683 {
 684         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 685         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 686         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 687
 688         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 689         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 690
 691         return 0;
 692 }
 693
 694 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 695 {
 696         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 697         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 698         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 699         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 700         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 701         unsigned long flags;
 702
 703         usbhsg_pipe_disable(uep);
 704
 705         dev_dbg(dev, "set halt %d (pipe %d)\n",
 706                 halt, usbhs_pipe_number(pipe));
 707
 708         /********************  spin lock ********************/
 709         usbhs_lock(priv, flags);
 710
 711         if (halt)
 712                 usbhs_pipe_stall(pipe);
 713         else
 714                 usbhs_pipe_disable(pipe);
 715
 716         if (halt && wedge)
 717                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 718         else
 719                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 720
 721         usbhs_unlock(priv, flags);
 722         /********************  spin unlock ******************/
 723
 724         return 0;
 725 }
 726
 727 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 728 {
 729         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 730 }
 731
 732 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 733 {
 734         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 735 }
 736
 737 static struct usb_ep_ops usbhsg_ep_ops = {
 738         .enable         = usbhsg_ep_enable,
 739         .disable        = usbhsg_ep_disable,
 740
 741         .alloc_request  = usbhsg_ep_alloc_request,
 742         .free_request   = usbhsg_ep_free_request,
 743
 744         .queue          = usbhsg_ep_queue,
 745         .dequeue        = usbhsg_ep_dequeue,
 746
 747         .set_halt       = usbhsg_ep_set_halt,
 748         .set_wedge      = usbhsg_ep_set_wedge,
 749 };
 750
 751 /*
 752  *              pullup control
 753  */
 754 static int usbhsg_can_pullup(struct usbhs_priv *priv)
 755 {
 756         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 757
 758         return gpriv->driver &&
 759                usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 760 }
 761
 762 static void usbhsg_update_pullup(struct usbhs_priv *priv)
 763 {
 764         if (usbhsg_can_pullup(priv))
 765                 usbhs_sys_function_pullup(priv, 1);
 766         else
 767                 usbhs_sys_function_pullup(priv, 0);
 768 }
 769
 770 /*
 771  *              usb module start/end
 772  */
 773 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 774 {
 775         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 776         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 777         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 778         struct device *dev = usbhs_priv_to_dev(priv);
 779         unsigned long flags;
 780         int ret = 0;
 781
 782         /********************  spin lock ********************/
 783         usbhs_lock(priv, flags);
 784
 785         usbhsg_status_set(gpriv, status);
 786         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 787               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 788                 ret = -1; /* not ready */
 789
 790         usbhs_unlock(priv, flags);
 791         /********************  spin unlock ********************/
 792
 793         if (ret < 0)
 794                 return 0; /* not ready is not error */
 795
 796         /*
 797          * enable interrupt and systems if ready
 798          */
 799         dev_dbg(dev, "start gadget\n");
 800
 801         /*
 802          * pipe initialize and enable DCP
 803          */
 804         usbhs_fifo_init(priv);
 805         usbhs_pipe_init(priv,
 806                         usbhsg_dma_map_ctrl);
 807
 808         /* dcp init instead of usbhsg_ep_enable() */
 809         dcp->pipe               = usbhs_dcp_malloc(priv);
 810         dcp->pipe->mod_private  = dcp;
 811         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 812
 813         /*
 814          * system config enble
 815          * - HI speed
 816          * - function
 817          * - usb module
 818          */
 819         usbhs_sys_function_ctrl(priv, 1);
 820         usbhsg_update_pullup(priv);
 821
 822         /*
 823          * enable irq callback
 824          */
 825         mod->irq_dev_state      = usbhsg_irq_dev_state;
 826         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 827         usbhs_irq_callback_update(priv, mod);
 828
 829         return 0;
 830 }
 831
 832 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 833 {
 834         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 835         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 836         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 837         struct device *dev = usbhs_priv_to_dev(priv);
 838         unsigned long flags;
 839         int ret = 0;
 840
 841         /********************  spin lock ********************/
 842         usbhs_lock(priv, flags);
 843
 844         usbhsg_status_clr(gpriv, status);
 845         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 846             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 847                 ret = -1; /* already done */
 848
 849         usbhs_unlock(priv, flags);
 850         /********************  spin unlock ********************/
 851
 852         if (ret < 0)
 853                 return 0; /* already done is not error */
 854
 855         /*
 856          * disable interrupt and systems if 1st try
 857          */
 858         usbhs_fifo_quit(priv);
 859
 860         /* disable all irq */
 861         mod->irq_dev_state      = NULL;
 862         mod->irq_ctrl_stage     = NULL;
 863         usbhs_irq_callback_update(priv, mod);
 864
 865         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 866
 867         /* disable sys */
 868         usbhs_sys_set_test_mode(priv, 0);
 869         usbhs_sys_function_ctrl(priv, 0);
 870
 871         usbhsg_ep_disable(&dcp->ep);
 872
 873         dev_dbg(dev, "stop gadget\n");
 874
 875         return 0;
 876 }
 877
 878 /*
 879  * VBUS provided by the PHY
 880  */
 881 static int usbhsm_phy_get_vbus(struct platform_device *pdev)
 882 {
 883         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 884         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 885
 886         return  gpriv->vbus_active;
 887 }
 888
 889 static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
 890 {
 891         struct usbhs_mod_info *info = &priv->mod_info;
 892
 893         info->irq_vbus          = NULL;
 894         priv->pfunc.get_vbus    = usbhsm_phy_get_vbus;
 895
 896         usbhs_irq_callback_update(priv, NULL);
 897 }
 898
 899 /*
 900  *
 901  *              linux usb function
 902  *
 903  */
 904 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 905                 struct usb_gadget_driver *driver)
 906 {
 907         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 908         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 909         struct device *dev = usbhs_priv_to_dev(priv);
 910         int ret;
 911
 912         if (!driver             ||
 913             !driver->setup      ||
 914             driver->max_speed < USB_SPEED_FULL)
 915                 return -EINVAL;
 916
 917         /* connect to bus through transceiver */
 918         if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
 919                 ret = otg_set_peripheral(gpriv->transceiver->otg,
 920                                         &gpriv->gadget);
 921                 if (ret) {
 922                         dev_err(dev, "%s: can't bind to transceiver\n",
 923                                 gpriv->gadget.name);
 924                         return ret;
 925                 }
 926
 927                 /* get vbus using phy versions */
 928                 usbhs_mod_phy_mode(priv);
 929         }
 930
 931         /* first hook up the driver ... */
 932         gpriv->driver = driver;
 933
 934         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 935 }
 936
 937 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
 938 {
 939         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 940         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 941
 942         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 943
 944         if (!IS_ERR_OR_NULL(gpriv->transceiver))
 945                 otg_set_peripheral(gpriv->transceiver->otg, NULL);
 946
 947         gpriv->driver = NULL;
 948
 949         return 0;
 950 }
 951
 952 /*
 953  *              usb gadget ops
 954  */
 955 static int usbhsg_get_frame(struct usb_gadget *gadget)
 956 {
 957         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 958         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 959
 960         return usbhs_frame_get_num(priv);
 961 }
 962
 963 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
 964 {
 965         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 966         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 967         unsigned long flags;
 968
 969         usbhs_lock(priv, flags);
 970         if (is_on)
 971                 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 972         else
 973                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 974         usbhsg_update_pullup(priv);
 975         usbhs_unlock(priv, flags);
 976
 977         return 0;
 978 }
 979
 980 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
 981 {
 982         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 983
 984         if (is_self)
 985                 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
 986         else
 987                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
 988
 989         gadget->is_selfpowered = (is_self != 0);
 990
 991         return 0;
 992 }
 993
 994 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
 995 {
 996         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 997         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 998         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 999
1000         gpriv->vbus_active = !!is_active;
1001
1002         renesas_usbhs_call_notify_hotplug(pdev);
1003
1004         return 0;
1005 }
1006
1007 static const struct usb_gadget_ops usbhsg_gadget_ops = {
1008         .get_frame              = usbhsg_get_frame,
1009         .set_selfpowered        = usbhsg_set_selfpowered,
1010         .udc_start              = usbhsg_gadget_start,
1011         .udc_stop               = usbhsg_gadget_stop,
1012         .pullup                 = usbhsg_pullup,
1013         .vbus_session           = usbhsg_vbus_session,
1014 };
1015
1016 static int usbhsg_start(struct usbhs_priv *priv)
1017 {
1018         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1019 }
1020
1021 static int usbhsg_stop(struct usbhs_priv *priv)
1022 {
1023         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1024
1025         /* cable disconnect */
1026         if (gpriv->driver &&
1027             gpriv->driver->disconnect)
1028                 gpriv->driver->disconnect(&gpriv->gadget);
1029
1030         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1031 }
1032
1033 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1034 {
1035         struct usbhsg_gpriv *gpriv;
1036         struct usbhsg_uep *uep;
1037         struct device *dev = usbhs_priv_to_dev(priv);
1038         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1039         int i;
1040         int ret;
1041
1042         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1043         if (!gpriv) {
1044                 dev_err(dev, "Could not allocate gadget priv\n");
1045                 return -ENOMEM;
1046         }
1047
1048         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1049         if (!uep) {
1050                 dev_err(dev, "Could not allocate ep\n");
1051                 ret = -ENOMEM;
1052                 goto usbhs_mod_gadget_probe_err_gpriv;
1053         }
1054
1055         gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1056         dev_info(dev, "%stransceiver found\n",
1057                  gpriv->transceiver ? "" : "no ");
1058
1059         /*
1060          * CAUTION
1061          *
1062          * There is no guarantee that it is possible to access usb module here.
1063          * Don't accesses to it.
1064          * The accesse will be enable after "usbhsg_start"
1065          */
1066
1067         /*
1068          * register itself
1069          */
1070         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1071
1072         /* init gpriv */
1073         gpriv->mod.name         = "gadget";
1074         gpriv->mod.start        = usbhsg_start;
1075         gpriv->mod.stop         = usbhsg_stop;
1076         gpriv->uep              = uep;
1077         gpriv->uep_size         = pipe_size;
1078         usbhsg_status_init(gpriv);
1079
1080         /*
1081          * init gadget
1082          */
1083         gpriv->gadget.dev.parent        = dev;
1084         gpriv->gadget.name              = "renesas_usbhs_udc";
1085         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1086         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
1087
1088         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1089
1090         /*
1091          * init usb_ep
1092          */
1093         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1094                 uep->gpriv      = gpriv;
1095                 uep->pipe       = NULL;
1096                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1097
1098                 uep->ep.name            = uep->ep_name;
1099                 uep->ep.ops             = &usbhsg_ep_ops;
1100                 INIT_LIST_HEAD(&uep->ep.ep_list);
1101
1102                 /* init DCP */
1103                 if (usbhsg_is_dcp(uep)) {
1104                         gpriv->gadget.ep0 = &uep->ep;
1105                         usb_ep_set_maxpacket_limit(&uep->ep, 64);
1106                         uep->ep.caps.type_control = true;
1107                 }
1108                 /* init normal pipe */
1109                 else {
1110                         usb_ep_set_maxpacket_limit(&uep->ep, 512);
1111                         uep->ep.caps.type_iso = true;
1112                         uep->ep.caps.type_bulk = true;
1113                         uep->ep.caps.type_int = true;
1114                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1115                 }
1116                 uep->ep.caps.dir_in = true;
1117                 uep->ep.caps.dir_out = true;
1118         }
1119
1120         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1121         if (ret)
1122                 goto err_add_udc;
1123
1124
1125         dev_info(dev, "gadget probed\n");
1126
1127         return 0;
1128
1129 err_add_udc:
1130         kfree(gpriv->uep);
1131
1132 usbhs_mod_gadget_probe_err_gpriv:
1133         kfree(gpriv);
1134
1135         return ret;
1136 }
1137
1138 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1139 {
1140         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1141
1142         usb_del_gadget_udc(&gpriv->gadget);
1143
1144         kfree(gpriv->uep);
1145         kfree(gpriv);
1146 }