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         spinlock_t              lock;   /* protect the pipe */
  41
  42         char ep_name[EP_NAME_SIZE];
  43
  44         struct usbhsg_gpriv *gpriv;
  45 };
  46
  47 struct usbhsg_gpriv {
  48         struct usb_gadget        gadget;
  49         struct usbhs_mod         mod;
  50
  51         struct usbhsg_uep       *uep;
  52         int                      uep_size;
  53
  54         struct usb_gadget_driver        *driver;
  55         struct usb_phy          *transceiver;
  56         bool                     vbus_active;
  57
  58         u32     status;
  59 #define USBHSG_STATUS_STARTED           (1 << 0)
  60 #define USBHSG_STATUS_REGISTERD         (1 << 1)
  61 #define USBHSG_STATUS_WEDGE             (1 << 2)
  62 #define USBHSG_STATUS_SELF_POWERED      (1 << 3)
  63 #define USBHSG_STATUS_SOFT_CONNECT      (1 << 4)
  64 };
  65
  66 struct usbhsg_recip_handle {
  67         char *name;
  68         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  69                       struct usb_ctrlrequest *ctrl);
  70         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  71                          struct usb_ctrlrequest *ctrl);
  72         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
  73                         struct usb_ctrlrequest *ctrl);
  74 };
  75
  76 /*
  77  *              macro
  78  */
  79 #define usbhsg_priv_to_gpriv(priv)                      \
  80         container_of(                                   \
  81                 usbhs_mod_get(priv, USBHS_GADGET),      \
  82                 struct usbhsg_gpriv, mod)
  83
  84 #define __usbhsg_for_each_uep(start, pos, g, i) \
  85         for ((i) = start;                                       \
  86              ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
  87              (i)++)
  88
  89 #define usbhsg_for_each_uep(pos, gpriv, i)      \
  90         __usbhsg_for_each_uep(1, pos, gpriv, i)
  91
  92 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
  93         __usbhsg_for_each_uep(0, pos, gpriv, i)
  94
  95 #define usbhsg_gadget_to_gpriv(g)\
  96         container_of(g, struct usbhsg_gpriv, gadget)
  97
  98 #define usbhsg_req_to_ureq(r)\
  99         container_of(r, struct usbhsg_request, req)
 100
 101 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
 102 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
 103 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
 104 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
 105 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
 106 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
 107 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
 108 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
 109 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
 110
 111 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
 112 #define usbhsg_pkt_to_ureq(i)   \
 113         container_of(i, struct usbhsg_request, pkt)
 114
 115 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
 116
 117 /* status */
 118 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
 119 #define usbhsg_status_set(gp, b) (gp->status |=  b)
 120 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 121 #define usbhsg_status_has(gp, b) (gp->status &   b)
 122
 123 /*
 124  *              queue push/pop
 125  */
 126 static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
 127                                struct usbhsg_request *ureq,
 128                                int status)
 129 {
 130         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 131         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 132         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 133         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 134
 135         if (pipe)
 136                 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 137
 138         ureq->req.status = status;
 139         spin_unlock(usbhs_priv_to_lock(priv));
 140         usb_gadget_giveback_request(&uep->ep, &ureq->req);
 141         spin_lock(usbhs_priv_to_lock(priv));
 142 }
 143
 144 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 145                              struct usbhsg_request *ureq,
 146                              int status)
 147 {
 148         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 149         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 150         unsigned long flags;
 151
 152         usbhs_lock(priv, flags);
 153         __usbhsg_queue_pop(uep, ureq, status);
 154         usbhs_unlock(priv, flags);
 155 }
 156
 157 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 158 {
 159         struct usbhs_pipe *pipe = pkt->pipe;
 160         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
 161         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 162         unsigned long flags;
 163
 164         ureq->req.actual = pkt->actual;
 165
 166         usbhs_lock(priv, flags);
 167         if (uep)
 168                 __usbhsg_queue_pop(uep, ureq, 0);
 169         usbhs_unlock(priv, flags);
 170 }
 171
 172 static void usbhsg_queue_push(struct usbhsg_uep *uep,
 173                               struct usbhsg_request *ureq)
 174 {
 175         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 176         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 177         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 178         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 179         struct usb_request *req = &ureq->req;
 180
 181         req->actual = 0;
 182         req->status = -EINPROGRESS;
 183         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
 184                        req->buf, req->length, req->zero, -1);
 185         usbhs_pkt_start(pipe);
 186
 187         dev_dbg(dev, "pipe %d : queue push (%d)\n",
 188                 usbhs_pipe_number(pipe),
 189                 req->length);
 190 }
 191
 192 /*
 193  *              dma map/unmap
 194  */
 195 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
 196                                int map)
 197 {
 198         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
 199         struct usb_request *req = &ureq->req;
 200         struct usbhs_pipe *pipe = pkt->pipe;
 201         enum dma_data_direction dir;
 202         int ret = 0;
 203
 204         dir = usbhs_pipe_is_dir_host(pipe);
 205
 206         if (map) {
 207                 /* it can not use scatter/gather */
 208                 WARN_ON(req->num_sgs);
 209
 210                 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir);
 211                 if (ret < 0)
 212                         return ret;
 213
 214                 pkt->dma = req->dma;
 215         } else {
 216                 usb_gadget_unmap_request_by_dev(dma_dev, req, dir);
 217         }
 218
 219         return ret;
 220 }
 221
 222 /*
 223  *              USB_TYPE_STANDARD / clear feature functions
 224  */
 225 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
 226                                                  struct usbhsg_uep *uep,
 227                                                  struct usb_ctrlrequest *ctrl)
 228 {
 229         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 230         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 231         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 232
 233         usbhs_dcp_control_transfer_done(pipe);
 234
 235         return 0;
 236 }
 237
 238 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 239                                                    struct usbhsg_uep *uep,
 240                                                    struct usb_ctrlrequest *ctrl)
 241 {
 242         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 243         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 244
 245         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
 246                 usbhs_pipe_disable(pipe);
 247                 usbhs_pipe_sequence_data0(pipe);
 248                 usbhs_pipe_enable(pipe);
 249         }
 250
 251         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 252
 253         usbhs_pkt_start(pipe);
 254
 255         return 0;
 256 }
 257
 258 static struct usbhsg_recip_handle req_clear_feature = {
 259         .name           = "clear feature",
 260         .device         = usbhsg_recip_handler_std_control_done,
 261         .interface      = usbhsg_recip_handler_std_control_done,
 262         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
 263 };
 264
 265 /*
 266  *              USB_TYPE_STANDARD / set feature functions
 267  */
 268 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
 269                                                  struct usbhsg_uep *uep,
 270                                                  struct usb_ctrlrequest *ctrl)
 271 {
 272         switch (le16_to_cpu(ctrl->wValue)) {
 273         case USB_DEVICE_TEST_MODE:
 274                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 275                 udelay(100);
 276                 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
 277                 break;
 278         default:
 279                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 280                 break;
 281         }
 282
 283         return 0;
 284 }
 285
 286 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
 287                                                  struct usbhsg_uep *uep,
 288                                                  struct usb_ctrlrequest *ctrl)
 289 {
 290         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 291
 292         usbhs_pipe_stall(pipe);
 293
 294         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 295
 296         return 0;
 297 }
 298
 299 static struct usbhsg_recip_handle req_set_feature = {
 300         .name           = "set feature",
 301         .device         = usbhsg_recip_handler_std_set_device,
 302         .interface      = usbhsg_recip_handler_std_control_done,
 303         .endpoint       = usbhsg_recip_handler_std_set_endpoint,
 304 };
 305
 306 /*
 307  *              USB_TYPE_STANDARD / get status functions
 308  */
 309 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
 310                                          struct usb_request *req)
 311 {
 312         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 313
 314         /* free allocated recip-buffer/usb_request */
 315         kfree(ureq->pkt.buf);
 316         usb_ep_free_request(ep, req);
 317 }
 318
 319 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
 320                                        unsigned short status)
 321 {
 322         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 323         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 324         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 325         struct usb_request *req;
 326         unsigned short *buf;
 327
 328         /* alloc new usb_request for recip */
 329         req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
 330         if (!req) {
 331                 dev_err(dev, "recip request allocation fail\n");
 332                 return;
 333         }
 334
 335         /* alloc recip data buffer */
 336         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
 337         if (!buf) {
 338                 usb_ep_free_request(&dcp->ep, req);
 339                 return;
 340         }
 341
 342         /* recip data is status */
 343         *buf = cpu_to_le16(status);
 344
 345         /* allocated usb_request/buffer will be freed */
 346         req->complete   = __usbhsg_recip_send_complete;
 347         req->buf        = buf;
 348         req->length     = sizeof(*buf);
 349         req->zero       = 0;
 350
 351         /* push packet */
 352         pipe->handler = &usbhs_fifo_pio_push_handler;
 353         usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
 354 }
 355
 356 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
 357                                                struct usbhsg_uep *uep,
 358                                                struct usb_ctrlrequest *ctrl)
 359 {
 360         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 361         unsigned short status = 0;
 362
 363         if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
 364                 status = 1 << USB_DEVICE_SELF_POWERED;
 365
 366         __usbhsg_recip_send_status(gpriv, status);
 367
 368         return 0;
 369 }
 370
 371 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
 372                                                   struct usbhsg_uep *uep,
 373                                                   struct usb_ctrlrequest *ctrl)
 374 {
 375         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 376         unsigned short status = 0;
 377
 378         __usbhsg_recip_send_status(gpriv, status);
 379
 380         return 0;
 381 }
 382
 383 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
 384                                                  struct usbhsg_uep *uep,
 385                                                  struct usb_ctrlrequest *ctrl)
 386 {
 387         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 388         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 389         unsigned short status = 0;
 390
 391         if (usbhs_pipe_is_stall(pipe))
 392                 status = 1 << USB_ENDPOINT_HALT;
 393
 394         __usbhsg_recip_send_status(gpriv, status);
 395
 396         return 0;
 397 }
 398
 399 static struct usbhsg_recip_handle req_get_status = {
 400         .name           = "get status",
 401         .device         = usbhsg_recip_handler_std_get_device,
 402         .interface      = usbhsg_recip_handler_std_get_interface,
 403         .endpoint       = usbhsg_recip_handler_std_get_endpoint,
 404 };
 405
 406 /*
 407  *              USB_TYPE handler
 408  */
 409 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 410                                    struct usbhsg_recip_handle *handler,
 411                                    struct usb_ctrlrequest *ctrl)
 412 {
 413         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 414         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 415         struct usbhsg_uep *uep;
 416         struct usbhs_pipe *pipe;
 417         int recip = ctrl->bRequestType & USB_RECIP_MASK;
 418         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 419         int ret = 0;
 420         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
 421                     struct usb_ctrlrequest *ctrl);
 422         char *msg;
 423
 424         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
 425         pipe = usbhsg_uep_to_pipe(uep);
 426         if (!pipe) {
 427                 dev_err(dev, "wrong recip request\n");
 428                 return -EINVAL;
 429         }
 430
 431         switch (recip) {
 432         case USB_RECIP_DEVICE:
 433                 msg     = "DEVICE";
 434                 func    = handler->device;
 435                 break;
 436         case USB_RECIP_INTERFACE:
 437                 msg     = "INTERFACE";
 438                 func    = handler->interface;
 439                 break;
 440         case USB_RECIP_ENDPOINT:
 441                 msg     = "ENDPOINT";
 442                 func    = handler->endpoint;
 443                 break;
 444         default:
 445                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
 446                 func = NULL;
 447                 ret = -EINVAL;
 448         }
 449
 450         if (func) {
 451                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
 452                 ret = func(priv, uep, ctrl);
 453         }
 454
 455         return ret;
 456 }
 457
 458 /*
 459  *              irq functions
 460  *
 461  * it will be called from usbhs_interrupt
 462  */
 463 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
 464                                 struct usbhs_irq_state *irq_state)
 465 {
 466         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 467         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 468
 469         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
 470
 471         dev_dbg(dev, "state = %x : speed : %d\n",
 472                 usbhs_status_get_device_state(irq_state),
 473                 gpriv->gadget.speed);
 474
 475         return 0;
 476 }
 477
 478 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
 479                                  struct usbhs_irq_state *irq_state)
 480 {
 481         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 482         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 483         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
 484         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 485         struct usb_ctrlrequest ctrl;
 486         struct usbhsg_recip_handle *recip_handler = NULL;
 487         int stage = usbhs_status_get_ctrl_stage(irq_state);
 488         int ret = 0;
 489
 490         dev_dbg(dev, "stage = %d\n", stage);
 491
 492         /*
 493          * see Manual
 494          *
 495          *  "Operation"
 496          *  - "Interrupt Function"
 497          *    - "Control Transfer Stage Transition Interrupt"
 498          *      - Fig. "Control Transfer Stage Transitions"
 499          */
 500
 501         switch (stage) {
 502         case READ_DATA_STAGE:
 503                 pipe->handler = &usbhs_fifo_pio_push_handler;
 504                 break;
 505         case WRITE_DATA_STAGE:
 506                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 507                 break;
 508         case NODATA_STATUS_STAGE:
 509                 pipe->handler = &usbhs_ctrl_stage_end_handler;
 510                 break;
 511         case READ_STATUS_STAGE:
 512         case WRITE_STATUS_STAGE:
 513                 usbhs_dcp_control_transfer_done(pipe);
 514         default:
 515                 return ret;
 516         }
 517
 518         /*
 519          * get usb request
 520          */
 521         usbhs_usbreq_get_val(priv, &ctrl);
 522
 523         switch (ctrl.bRequestType & USB_TYPE_MASK) {
 524         case USB_TYPE_STANDARD:
 525                 switch (ctrl.bRequest) {
 526                 case USB_REQ_CLEAR_FEATURE:
 527                         recip_handler = &req_clear_feature;
 528                         break;
 529                 case USB_REQ_SET_FEATURE:
 530                         recip_handler = &req_set_feature;
 531                         break;
 532                 case USB_REQ_GET_STATUS:
 533                         recip_handler = &req_get_status;
 534                         break;
 535                 }
 536         }
 537
 538         /*
 539          * setup stage / run recip
 540          */
 541         if (recip_handler)
 542                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
 543         else
 544                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
 545
 546         if (ret < 0)
 547                 usbhs_pipe_stall(pipe);
 548
 549         return ret;
 550 }
 551
 552 /*
 553  *
 554  *              usb_dcp_ops
 555  *
 556  */
 557 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
 558 {
 559         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 560         struct usbhs_pkt *pkt;
 561
 562         while (1) {
 563                 pkt = usbhs_pkt_pop(pipe, NULL);
 564                 if (!pkt)
 565                         break;
 566
 567                 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
 568         }
 569
 570         usbhs_pipe_disable(pipe);
 571
 572         return 0;
 573 }
 574
 575 /*
 576  *
 577  *              usb_ep_ops
 578  *
 579  */
 580 static int usbhsg_ep_enable(struct usb_ep *ep,
 581                          const struct usb_endpoint_descriptor *desc)
 582 {
 583         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
 584         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 585         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 586         struct usbhs_pipe *pipe;
 587         int ret = -EIO;
 588         unsigned long flags;
 589
 590         usbhs_lock(priv, flags);
 591
 592         /*
 593          * if it already have pipe,
 594          * nothing to do
 595          */
 596         if (uep->pipe) {
 597                 usbhs_pipe_clear(uep->pipe);
 598                 usbhs_pipe_sequence_data0(uep->pipe);
 599                 ret = 0;
 600                 goto usbhsg_ep_enable_end;
 601         }
 602
 603         pipe = usbhs_pipe_malloc(priv,
 604                                  usb_endpoint_type(desc),
 605                                  usb_endpoint_dir_in(desc));
 606         if (pipe) {
 607                 uep->pipe               = pipe;
 608                 pipe->mod_private       = uep;
 609
 610                 /* set epnum / maxp */
 611                 usbhs_pipe_config_update(pipe, 0,
 612                                          usb_endpoint_num(desc),
 613                                          usb_endpoint_maxp(desc));
 614
 615                 /*
 616                  * usbhs_fifo_dma_push/pop_handler try to
 617                  * use dmaengine if possible.
 618                  * It will use pio handler if impossible.
 619                  */
 620                 if (usb_endpoint_dir_in(desc)) {
 621                         pipe->handler = &usbhs_fifo_dma_push_handler;
 622                 } else {
 623                         pipe->handler = &usbhs_fifo_dma_pop_handler;
 624                         usbhs_xxxsts_clear(priv, BRDYSTS,
 625                                            usbhs_pipe_number(pipe));
 626                 }
 627
 628                 ret = 0;
 629         }
 630
 631 usbhsg_ep_enable_end:
 632         usbhs_unlock(priv, flags);
 633
 634         return ret;
 635 }
 636
 637 static int usbhsg_ep_disable(struct usb_ep *ep)
 638 {
 639         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 640         struct usbhs_pipe *pipe;
 641         unsigned long flags;
 642
 643         spin_lock_irqsave(&uep->lock, flags);
 644         pipe = usbhsg_uep_to_pipe(uep);
 645         if (!pipe)
 646                 goto out;
 647
 648         usbhsg_pipe_disable(uep);
 649         usbhs_pipe_free(pipe);
 650
 651         uep->pipe->mod_private  = NULL;
 652         uep->pipe               = NULL;
 653
 654 out:
 655         spin_unlock_irqrestore(&uep->lock, flags);
 656
 657         return 0;
 658 }
 659
 660 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 661                                                    gfp_t gfp_flags)
 662 {
 663         struct usbhsg_request *ureq;
 664
 665         ureq = kzalloc(sizeof *ureq, gfp_flags);
 666         if (!ureq)
 667                 return NULL;
 668
 669         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
 670
 671         return &ureq->req;
 672 }
 673
 674 static void usbhsg_ep_free_request(struct usb_ep *ep,
 675                                    struct usb_request *req)
 676 {
 677         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 678
 679         WARN_ON(!list_empty(&ureq->pkt.node));
 680         kfree(ureq);
 681 }
 682
 683 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 684                           gfp_t gfp_flags)
 685 {
 686         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 687         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 688         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 689         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 690
 691         /* param check */
 692         if (usbhsg_is_not_connected(gpriv)      ||
 693             unlikely(!gpriv->driver)            ||
 694             unlikely(!pipe))
 695                 return -ESHUTDOWN;
 696
 697         usbhsg_queue_push(uep, ureq);
 698
 699         return 0;
 700 }
 701
 702 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 703 {
 704         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 705         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 706         struct usbhs_pipe *pipe;
 707         unsigned long flags;
 708
 709         spin_lock_irqsave(&uep->lock, flags);
 710         pipe = usbhsg_uep_to_pipe(uep);
 711         if (pipe)
 712                 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
 713
 714         /*
 715          * To dequeue a request, this driver should call the usbhsg_queue_pop()
 716          * even if the pipe is NULL.
 717          */
 718         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
 719         spin_unlock_irqrestore(&uep->lock, flags);
 720
 721         return 0;
 722 }
 723
 724 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
 725 {
 726         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
 727         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 728         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 729         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 730         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 731         unsigned long flags;
 732
 733         usbhsg_pipe_disable(uep);
 734
 735         dev_dbg(dev, "set halt %d (pipe %d)\n",
 736                 halt, usbhs_pipe_number(pipe));
 737
 738         /********************  spin lock ********************/
 739         usbhs_lock(priv, flags);
 740
 741         if (halt)
 742                 usbhs_pipe_stall(pipe);
 743         else
 744                 usbhs_pipe_disable(pipe);
 745
 746         if (halt && wedge)
 747                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
 748         else
 749                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
 750
 751         usbhs_unlock(priv, flags);
 752         /********************  spin unlock ******************/
 753
 754         return 0;
 755 }
 756
 757 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
 758 {
 759         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
 760 }
 761
 762 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
 763 {
 764         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
 765 }
 766
 767 static struct usb_ep_ops usbhsg_ep_ops = {
 768         .enable         = usbhsg_ep_enable,
 769         .disable        = usbhsg_ep_disable,
 770
 771         .alloc_request  = usbhsg_ep_alloc_request,
 772         .free_request   = usbhsg_ep_free_request,
 773
 774         .queue          = usbhsg_ep_queue,
 775         .dequeue        = usbhsg_ep_dequeue,
 776
 777         .set_halt       = usbhsg_ep_set_halt,
 778         .set_wedge      = usbhsg_ep_set_wedge,
 779 };
 780
 781 /*
 782  *              pullup control
 783  */
 784 static int usbhsg_can_pullup(struct usbhs_priv *priv)
 785 {
 786         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 787
 788         return gpriv->driver &&
 789                usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
 790 }
 791
 792 static void usbhsg_update_pullup(struct usbhs_priv *priv)
 793 {
 794         if (usbhsg_can_pullup(priv))
 795                 usbhs_sys_function_pullup(priv, 1);
 796         else
 797                 usbhs_sys_function_pullup(priv, 0);
 798 }
 799
 800 /*
 801  *              usb module start/end
 802  */
 803 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
 804 {
 805         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 806         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
 807         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 808         struct device *dev = usbhs_priv_to_dev(priv);
 809         unsigned long flags;
 810         int ret = 0;
 811
 812         /********************  spin lock ********************/
 813         usbhs_lock(priv, flags);
 814
 815         usbhsg_status_set(gpriv, status);
 816         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 817               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
 818                 ret = -1; /* not ready */
 819
 820         usbhs_unlock(priv, flags);
 821         /********************  spin unlock ********************/
 822
 823         if (ret < 0)
 824                 return 0; /* not ready is not error */
 825
 826         /*
 827          * enable interrupt and systems if ready
 828          */
 829         dev_dbg(dev, "start gadget\n");
 830
 831         /*
 832          * pipe initialize and enable DCP
 833          */
 834         usbhs_fifo_init(priv);
 835         usbhs_pipe_init(priv,
 836                         usbhsg_dma_map_ctrl);
 837
 838         /* dcp init instead of usbhsg_ep_enable() */
 839         dcp->pipe               = usbhs_dcp_malloc(priv);
 840         dcp->pipe->mod_private  = dcp;
 841         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
 842
 843         /*
 844          * system config enble
 845          * - HI speed
 846          * - function
 847          * - usb module
 848          */
 849         usbhs_sys_function_ctrl(priv, 1);
 850         usbhsg_update_pullup(priv);
 851
 852         /*
 853          * enable irq callback
 854          */
 855         mod->irq_dev_state      = usbhsg_irq_dev_state;
 856         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
 857         usbhs_irq_callback_update(priv, mod);
 858
 859         return 0;
 860 }
 861
 862 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
 863 {
 864         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 865         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 866         struct usbhsg_uep *uep;
 867         struct device *dev = usbhs_priv_to_dev(priv);
 868         unsigned long flags;
 869         int ret = 0, i;
 870
 871         /********************  spin lock ********************/
 872         usbhs_lock(priv, flags);
 873
 874         usbhsg_status_clr(gpriv, status);
 875         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
 876             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
 877                 ret = -1; /* already done */
 878
 879         usbhs_unlock(priv, flags);
 880         /********************  spin unlock ********************/
 881
 882         if (ret < 0)
 883                 return 0; /* already done is not error */
 884
 885         /*
 886          * disable interrupt and systems if 1st try
 887          */
 888         usbhs_fifo_quit(priv);
 889
 890         /* disable all irq */
 891         mod->irq_dev_state      = NULL;
 892         mod->irq_ctrl_stage     = NULL;
 893         usbhs_irq_callback_update(priv, mod);
 894
 895         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 896
 897         /* disable sys */
 898         usbhs_sys_set_test_mode(priv, 0);
 899         usbhs_sys_function_ctrl(priv, 0);
 900
 901         /* disable all eps */
 902         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
 903                 usbhsg_ep_disable(&uep->ep);
 904
 905         dev_dbg(dev, "stop gadget\n");
 906
 907         return 0;
 908 }
 909
 910 /*
 911  * VBUS provided by the PHY
 912  */
 913 static int usbhsm_phy_get_vbus(struct platform_device *pdev)
 914 {
 915         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 916         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 917
 918         return  gpriv->vbus_active;
 919 }
 920
 921 static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
 922 {
 923         struct usbhs_mod_info *info = &priv->mod_info;
 924
 925         info->irq_vbus          = NULL;
 926         priv->pfunc.get_vbus    = usbhsm_phy_get_vbus;
 927
 928         usbhs_irq_callback_update(priv, NULL);
 929 }
 930
 931 /*
 932  *
 933  *              linux usb function
 934  *
 935  */
 936 static int usbhsg_gadget_start(struct usb_gadget *gadget,
 937                 struct usb_gadget_driver *driver)
 938 {
 939         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 940         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 941         struct device *dev = usbhs_priv_to_dev(priv);
 942         int ret;
 943
 944         if (!driver             ||
 945             !driver->setup      ||
 946             driver->max_speed < USB_SPEED_FULL)
 947                 return -EINVAL;
 948
 949         /* connect to bus through transceiver */
 950         if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
 951                 ret = otg_set_peripheral(gpriv->transceiver->otg,
 952                                         &gpriv->gadget);
 953                 if (ret) {
 954                         dev_err(dev, "%s: can't bind to transceiver\n",
 955                                 gpriv->gadget.name);
 956                         return ret;
 957                 }
 958
 959                 /* get vbus using phy versions */
 960                 usbhs_mod_phy_mode(priv);
 961         }
 962
 963         /* first hook up the driver ... */
 964         gpriv->driver = driver;
 965
 966         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
 967 }
 968
 969 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
 970 {
 971         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 972         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 973
 974         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
 975
 976         if (!IS_ERR_OR_NULL(gpriv->transceiver))
 977                 otg_set_peripheral(gpriv->transceiver->otg, NULL);
 978
 979         gpriv->driver = NULL;
 980
 981         return 0;
 982 }
 983
 984 /*
 985  *              usb gadget ops
 986  */
 987 static int usbhsg_get_frame(struct usb_gadget *gadget)
 988 {
 989         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 990         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 991
 992         return usbhs_frame_get_num(priv);
 993 }
 994
 995 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
 996 {
 997         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
 998         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 999         unsigned long flags;
1000
1001         usbhs_lock(priv, flags);
1002         if (is_on)
1003                 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1004         else
1005                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1006         usbhsg_update_pullup(priv);
1007         usbhs_unlock(priv, flags);
1008
1009         return 0;
1010 }
1011
1012 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
1013 {
1014         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1015
1016         if (is_self)
1017                 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
1018         else
1019                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1020
1021         gadget->is_selfpowered = (is_self != 0);
1022
1023         return 0;
1024 }
1025
1026 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1027 {
1028         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1029         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1030         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1031
1032         gpriv->vbus_active = !!is_active;
1033
1034         renesas_usbhs_call_notify_hotplug(pdev);
1035
1036         return 0;
1037 }
1038
1039 static const struct usb_gadget_ops usbhsg_gadget_ops = {
1040         .get_frame              = usbhsg_get_frame,
1041         .set_selfpowered        = usbhsg_set_selfpowered,
1042         .udc_start              = usbhsg_gadget_start,
1043         .udc_stop               = usbhsg_gadget_stop,
1044         .pullup                 = usbhsg_pullup,
1045         .vbus_session           = usbhsg_vbus_session,
1046 };
1047
1048 static int usbhsg_start(struct usbhs_priv *priv)
1049 {
1050         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1051 }
1052
1053 static int usbhsg_stop(struct usbhs_priv *priv)
1054 {
1055         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1056
1057         /* cable disconnect */
1058         if (gpriv->driver &&
1059             gpriv->driver->disconnect)
1060                 gpriv->driver->disconnect(&gpriv->gadget);
1061
1062         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1063 }
1064
1065 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1066 {
1067         struct usbhsg_gpriv *gpriv;
1068         struct usbhsg_uep *uep;
1069         struct device *dev = usbhs_priv_to_dev(priv);
1070         struct renesas_usbhs_driver_pipe_config *pipe_configs =
1071                                         usbhs_get_dparam(priv, pipe_configs);
1072         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1073         int i;
1074         int ret;
1075
1076         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1077         if (!gpriv)
1078                 return -ENOMEM;
1079
1080         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1081         if (!uep) {
1082                 ret = -ENOMEM;
1083                 goto usbhs_mod_gadget_probe_err_gpriv;
1084         }
1085         spin_lock_init(&uep->lock);
1086
1087         gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1088         dev_info(dev, "%stransceiver found\n",
1089                  !IS_ERR(gpriv->transceiver) ? "" : "no ");
1090
1091         /*
1092          * CAUTION
1093          *
1094          * There is no guarantee that it is possible to access usb module here.
1095          * Don't accesses to it.
1096          * The accesse will be enable after "usbhsg_start"
1097          */
1098
1099         /*
1100          * register itself
1101          */
1102         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1103
1104         /* init gpriv */
1105         gpriv->mod.name         = "gadget";
1106         gpriv->mod.start        = usbhsg_start;
1107         gpriv->mod.stop         = usbhsg_stop;
1108         gpriv->uep              = uep;
1109         gpriv->uep_size         = pipe_size;
1110         usbhsg_status_init(gpriv);
1111
1112         /*
1113          * init gadget
1114          */
1115         gpriv->gadget.dev.parent        = dev;
1116         gpriv->gadget.name              = "renesas_usbhs_udc";
1117         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1118         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
1119         gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
1120                                                                 has_usb_dmac);
1121
1122         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1123
1124         /*
1125          * init usb_ep
1126          */
1127         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1128                 uep->gpriv      = gpriv;
1129                 uep->pipe       = NULL;
1130                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1131
1132                 uep->ep.name            = uep->ep_name;
1133                 uep->ep.ops             = &usbhsg_ep_ops;
1134                 INIT_LIST_HEAD(&uep->ep.ep_list);
1135
1136                 /* init DCP */
1137                 if (usbhsg_is_dcp(uep)) {
1138                         gpriv->gadget.ep0 = &uep->ep;
1139                         usb_ep_set_maxpacket_limit(&uep->ep, 64);
1140                         uep->ep.caps.type_control = true;
1141                 } else {
1142                         /* init normal pipe */
1143                         if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1144                                 uep->ep.caps.type_iso = true;
1145                         if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1146                                 uep->ep.caps.type_bulk = true;
1147                         if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1148                                 uep->ep.caps.type_int = true;
1149                         usb_ep_set_maxpacket_limit(&uep->ep,
1150                                                    pipe_configs[i].bufsize);
1151                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1152                 }
1153                 uep->ep.caps.dir_in = true;
1154                 uep->ep.caps.dir_out = true;
1155         }
1156
1157         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1158         if (ret)
1159                 goto err_add_udc;
1160
1161
1162         dev_info(dev, "gadget probed\n");
1163
1164         return 0;
1165
1166 err_add_udc:
1167         kfree(gpriv->uep);
1168
1169 usbhs_mod_gadget_probe_err_gpriv:
1170         kfree(gpriv);
1171
1172         return ret;
1173 }
1174
1175 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1176 {
1177         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1178
1179         usb_del_gadget_udc(&gpriv->gadget);
1180
1181         kfree(gpriv->uep);
1182         kfree(gpriv);
1183 }