1 /* 2 * Renesas USB driver 3 * 4 * Copyright (C) 2011 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 15 * 16 */ 17 #include <linux/dma-mapping.h> 18 #include <linux/io.h> 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/usb/ch9.h> 22 #include <linux/usb/gadget.h> 23 #include "common.h" 24 25 /* 26 * struct 27 */ 28 struct usbhsg_request { 29 struct usb_request req; 30 struct usbhs_pkt pkt; 31 }; 32 33 #define EP_NAME_SIZE 8 34 struct usbhsg_gpriv; 35 struct usbhsg_uep { 36 struct usb_ep ep; 37 struct usbhs_pipe *pipe; 38 39 char ep_name[EP_NAME_SIZE]; 40 41 struct usbhsg_gpriv *gpriv; 42 }; 43 44 struct usbhsg_gpriv { 45 struct usb_gadget gadget; 46 struct usbhs_mod mod; 47 struct list_head link; 48 49 struct usbhsg_uep *uep; 50 int uep_size; 51 52 struct usb_gadget_driver *driver; 53 54 u32 status; 55 #define USBHSG_STATUS_STARTED (1 << 0) 56 #define USBHSG_STATUS_REGISTERD (1 << 1) 57 #define USBHSG_STATUS_WEDGE (1 << 2) 58 }; 59 60 struct usbhsg_recip_handle { 61 char *name; 62 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 63 struct usb_ctrlrequest *ctrl); 64 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 65 struct usb_ctrlrequest *ctrl); 66 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 67 struct usb_ctrlrequest *ctrl); 68 }; 69 70 /* 71 * macro 72 */ 73 #define usbhsg_priv_to_gpriv(priv) \ 74 container_of( \ 75 usbhs_mod_get(priv, USBHS_GADGET), \ 76 struct usbhsg_gpriv, mod) 77 78 #define __usbhsg_for_each_uep(start, pos, g, i) \ 79 for (i = start, pos = (g)->uep + i; \ 80 i < (g)->uep_size; \ 81 i++, pos = (g)->uep + i) 82 83 #define usbhsg_for_each_uep(pos, gpriv, i) \ 84 __usbhsg_for_each_uep(1, pos, gpriv, i) 85 86 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \ 87 __usbhsg_for_each_uep(0, pos, gpriv, i) 88 89 #define usbhsg_gadget_to_gpriv(g)\ 90 container_of(g, struct usbhsg_gpriv, gadget) 91 92 #define usbhsg_req_to_ureq(r)\ 93 container_of(r, struct usbhsg_request, req) 94 95 #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep) 96 #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv) 97 #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv) 98 #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep) 99 #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i) 100 #define usbhsg_uep_to_gpriv(u) ((u)->gpriv) 101 #define usbhsg_uep_to_pipe(u) ((u)->pipe) 102 #define usbhsg_pipe_to_uep(p) ((p)->mod_private) 103 #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv)) 104 105 #define usbhsg_ureq_to_pkt(u) (&(u)->pkt) 106 #define usbhsg_pkt_to_ureq(i) \ 107 container_of(i, struct usbhsg_request, pkt) 108 109 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN) 110 111 /* status */ 112 #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0) 113 #define usbhsg_status_set(gp, b) (gp->status |= b) 114 #define usbhsg_status_clr(gp, b) (gp->status &= ~b) 115 #define usbhsg_status_has(gp, b) (gp->status & b) 116 117 /* controller */ 118 LIST_HEAD(the_controller_link); 119 120 #define usbhsg_for_each_controller(gpriv)\ 121 list_for_each_entry(gpriv, &the_controller_link, link) 122 #define usbhsg_controller_register(gpriv)\ 123 list_add_tail(&(gpriv)->link, &the_controller_link) 124 #define usbhsg_controller_unregister(gpriv)\ 125 list_del_init(&(gpriv)->link) 126 127 /* 128 * queue push/pop 129 */ 130 static void usbhsg_queue_pop(struct usbhsg_uep *uep, 131 struct usbhsg_request *ureq, 132 int status) 133 { 134 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 135 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 136 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 137 138 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); 139 140 ureq->req.status = status; 141 ureq->req.complete(&uep->ep, &ureq->req); 142 } 143 144 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 145 { 146 struct usbhs_pipe *pipe = pkt->pipe; 147 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 148 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 149 150 ureq->req.actual = pkt->actual; 151 152 usbhsg_queue_pop(uep, ureq, 0); 153 } 154 155 static void usbhsg_queue_push(struct usbhsg_uep *uep, 156 struct usbhsg_request *ureq) 157 { 158 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 159 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 160 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 161 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); 162 struct usb_request *req = &ureq->req; 163 164 req->actual = 0; 165 req->status = -EINPROGRESS; 166 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done, 167 req->buf, req->length, req->zero); 168 usbhs_pkt_start(pipe); 169 170 dev_dbg(dev, "pipe %d : queue push (%d)\n", 171 usbhs_pipe_number(pipe), 172 req->length); 173 } 174 175 /* 176 * dma map/unmap 177 */ 178 static int usbhsg_dma_map(struct device *dev, 179 struct usbhs_pkt *pkt, 180 enum dma_data_direction dir) 181 { 182 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 183 struct usb_request *req = &ureq->req; 184 185 if (pkt->dma != DMA_ADDR_INVALID) { 186 dev_err(dev, "dma is already mapped\n"); 187 return -EIO; 188 } 189 190 if (req->dma == DMA_ADDR_INVALID) { 191 pkt->dma = dma_map_single(dev, pkt->buf, pkt->length, dir); 192 } else { 193 dma_sync_single_for_device(dev, req->dma, req->length, dir); 194 pkt->dma = req->dma; 195 } 196 197 if (dma_mapping_error(dev, pkt->dma)) { 198 dev_err(dev, "dma mapping error %x\n", pkt->dma); 199 return -EIO; 200 } 201 202 return 0; 203 } 204 205 static int usbhsg_dma_unmap(struct device *dev, 206 struct usbhs_pkt *pkt, 207 enum dma_data_direction dir) 208 { 209 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 210 struct usb_request *req = &ureq->req; 211 212 if (pkt->dma == DMA_ADDR_INVALID) { 213 dev_err(dev, "dma is not mapped\n"); 214 return -EIO; 215 } 216 217 if (req->dma == DMA_ADDR_INVALID) 218 dma_unmap_single(dev, pkt->dma, pkt->length, dir); 219 else 220 dma_sync_single_for_cpu(dev, req->dma, req->length, dir); 221 222 pkt->dma = DMA_ADDR_INVALID; 223 224 return 0; 225 } 226 227 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map) 228 { 229 struct usbhs_pipe *pipe = pkt->pipe; 230 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 231 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 232 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 233 enum dma_data_direction dir; 234 235 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 236 237 if (map) 238 return usbhsg_dma_map(dev, pkt, dir); 239 else 240 return usbhsg_dma_unmap(dev, pkt, dir); 241 } 242 243 /* 244 * USB_TYPE_STANDARD / clear feature functions 245 */ 246 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, 247 struct usbhsg_uep *uep, 248 struct usb_ctrlrequest *ctrl) 249 { 250 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 251 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 252 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 253 254 usbhs_dcp_control_transfer_done(pipe); 255 256 return 0; 257 } 258 259 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, 260 struct usbhsg_uep *uep, 261 struct usb_ctrlrequest *ctrl) 262 { 263 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 264 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 265 266 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { 267 usbhs_pipe_disable(pipe); 268 usbhs_pipe_sequence_data0(pipe); 269 usbhs_pipe_enable(pipe); 270 } 271 272 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 273 274 return 0; 275 } 276 277 struct usbhsg_recip_handle req_clear_feature = { 278 .name = "clear feature", 279 .device = usbhsg_recip_handler_std_control_done, 280 .interface = usbhsg_recip_handler_std_control_done, 281 .endpoint = usbhsg_recip_handler_std_clear_endpoint, 282 }; 283 284 /* 285 * USB_TYPE handler 286 */ 287 static int usbhsg_recip_run_handle(struct usbhs_priv *priv, 288 struct usbhsg_recip_handle *handler, 289 struct usb_ctrlrequest *ctrl) 290 { 291 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 292 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 293 struct usbhsg_uep *uep; 294 struct usbhs_pipe *pipe; 295 int recip = ctrl->bRequestType & USB_RECIP_MASK; 296 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; 297 int ret; 298 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 299 struct usb_ctrlrequest *ctrl); 300 char *msg; 301 302 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth); 303 pipe = usbhsg_uep_to_pipe(uep); 304 if (!pipe) { 305 dev_err(dev, "wrong recip request\n"); 306 ret = -EINVAL; 307 goto usbhsg_recip_run_handle_end; 308 } 309 310 switch (recip) { 311 case USB_RECIP_DEVICE: 312 msg = "DEVICE"; 313 func = handler->device; 314 break; 315 case USB_RECIP_INTERFACE: 316 msg = "INTERFACE"; 317 func = handler->interface; 318 break; 319 case USB_RECIP_ENDPOINT: 320 msg = "ENDPOINT"; 321 func = handler->endpoint; 322 break; 323 default: 324 dev_warn(dev, "unsupported RECIP(%d)\n", recip); 325 func = NULL; 326 ret = -EINVAL; 327 } 328 329 if (func) { 330 unsigned long flags; 331 332 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg); 333 334 /******************** spin lock ********************/ 335 usbhs_lock(priv, flags); 336 ret = func(priv, uep, ctrl); 337 usbhs_unlock(priv, flags); 338 /******************** spin unlock ******************/ 339 } 340 341 usbhsg_recip_run_handle_end: 342 usbhs_pkt_start(pipe); 343 344 return ret; 345 } 346 347 /* 348 * irq functions 349 * 350 * it will be called from usbhs_interrupt 351 */ 352 static int usbhsg_irq_dev_state(struct usbhs_priv *priv, 353 struct usbhs_irq_state *irq_state) 354 { 355 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 356 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 357 358 gpriv->gadget.speed = usbhs_bus_get_speed(priv); 359 360 dev_dbg(dev, "state = %x : speed : %d\n", 361 usbhs_status_get_device_state(irq_state), 362 gpriv->gadget.speed); 363 364 return 0; 365 } 366 367 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv, 368 struct usbhs_irq_state *irq_state) 369 { 370 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 371 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 372 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 373 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 374 struct usb_ctrlrequest ctrl; 375 struct usbhsg_recip_handle *recip_handler = NULL; 376 int stage = usbhs_status_get_ctrl_stage(irq_state); 377 int ret = 0; 378 379 dev_dbg(dev, "stage = %d\n", stage); 380 381 /* 382 * see Manual 383 * 384 * "Operation" 385 * - "Interrupt Function" 386 * - "Control Transfer Stage Transition Interrupt" 387 * - Fig. "Control Transfer Stage Transitions" 388 */ 389 390 switch (stage) { 391 case READ_DATA_STAGE: 392 pipe->handler = &usbhs_fifo_pio_push_handler; 393 break; 394 case WRITE_DATA_STAGE: 395 pipe->handler = &usbhs_fifo_pio_pop_handler; 396 break; 397 case NODATA_STATUS_STAGE: 398 pipe->handler = &usbhs_ctrl_stage_end_handler; 399 break; 400 default: 401 return ret; 402 } 403 404 /* 405 * get usb request 406 */ 407 usbhs_usbreq_get_val(priv, &ctrl); 408 409 switch (ctrl.bRequestType & USB_TYPE_MASK) { 410 case USB_TYPE_STANDARD: 411 switch (ctrl.bRequest) { 412 case USB_REQ_CLEAR_FEATURE: 413 recip_handler = &req_clear_feature; 414 break; 415 } 416 } 417 418 /* 419 * setup stage / run recip 420 */ 421 if (recip_handler) 422 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl); 423 else 424 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl); 425 426 if (ret < 0) 427 usbhs_pipe_stall(pipe); 428 429 return ret; 430 } 431 432 /* 433 * 434 * usb_dcp_ops 435 * 436 */ 437 static int usbhsg_pipe_disable(struct usbhsg_uep *uep) 438 { 439 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 440 struct usbhs_pkt *pkt; 441 442 usbhs_pipe_disable(pipe); 443 444 while (1) { 445 pkt = usbhs_pkt_pop(pipe, NULL); 446 if (!pkt) 447 break; 448 } 449 450 return 0; 451 } 452 453 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv) 454 { 455 int i; 456 struct usbhsg_uep *uep; 457 458 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) 459 uep->pipe = NULL; 460 } 461 462 /* 463 * 464 * usb_ep_ops 465 * 466 */ 467 static int usbhsg_ep_enable(struct usb_ep *ep, 468 const struct usb_endpoint_descriptor *desc) 469 { 470 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 471 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 472 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 473 struct usbhs_pipe *pipe; 474 int ret = -EIO; 475 476 /* 477 * if it already have pipe, 478 * nothing to do 479 */ 480 if (uep->pipe) { 481 usbhs_pipe_clear(uep->pipe); 482 usbhs_pipe_sequence_data0(uep->pipe); 483 return 0; 484 } 485 486 pipe = usbhs_pipe_malloc(priv, 487 usb_endpoint_type(desc), 488 usb_endpoint_dir_in(desc)); 489 if (pipe) { 490 uep->pipe = pipe; 491 pipe->mod_private = uep; 492 493 /* set epnum / maxp */ 494 usbhs_pipe_config_update(pipe, 0, 495 usb_endpoint_num(desc), 496 usb_endpoint_maxp(desc)); 497 498 /* 499 * usbhs_fifo_dma_push/pop_handler try to 500 * use dmaengine if possible. 501 * It will use pio handler if impossible. 502 */ 503 if (usb_endpoint_dir_in(desc)) 504 pipe->handler = &usbhs_fifo_dma_push_handler; 505 else 506 pipe->handler = &usbhs_fifo_dma_pop_handler; 507 508 ret = 0; 509 } 510 511 return ret; 512 } 513 514 static int usbhsg_ep_disable(struct usb_ep *ep) 515 { 516 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 517 518 return usbhsg_pipe_disable(uep); 519 } 520 521 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 522 gfp_t gfp_flags) 523 { 524 struct usbhsg_request *ureq; 525 526 ureq = kzalloc(sizeof *ureq, gfp_flags); 527 if (!ureq) 528 return NULL; 529 530 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 531 532 ureq->req.dma = DMA_ADDR_INVALID; 533 534 return &ureq->req; 535 } 536 537 static void usbhsg_ep_free_request(struct usb_ep *ep, 538 struct usb_request *req) 539 { 540 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 541 542 WARN_ON(!list_empty(&ureq->pkt.node)); 543 kfree(ureq); 544 } 545 546 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 547 gfp_t gfp_flags) 548 { 549 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 550 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 551 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 552 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 553 554 /* param check */ 555 if (usbhsg_is_not_connected(gpriv) || 556 unlikely(!gpriv->driver) || 557 unlikely(!pipe)) 558 return -ESHUTDOWN; 559 560 usbhsg_queue_push(uep, ureq); 561 562 return 0; 563 } 564 565 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 566 { 567 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 568 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 569 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 570 571 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 572 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 573 574 return 0; 575 } 576 577 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 578 { 579 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 580 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 581 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 582 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 583 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 584 unsigned long flags; 585 586 usbhsg_pipe_disable(uep); 587 588 dev_dbg(dev, "set halt %d (pipe %d)\n", 589 halt, usbhs_pipe_number(pipe)); 590 591 /******************** spin lock ********************/ 592 usbhs_lock(priv, flags); 593 594 if (halt) 595 usbhs_pipe_stall(pipe); 596 else 597 usbhs_pipe_disable(pipe); 598 599 if (halt && wedge) 600 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 601 else 602 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 603 604 usbhs_unlock(priv, flags); 605 /******************** spin unlock ******************/ 606 607 return 0; 608 } 609 610 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 611 { 612 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 613 } 614 615 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 616 { 617 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 618 } 619 620 static struct usb_ep_ops usbhsg_ep_ops = { 621 .enable = usbhsg_ep_enable, 622 .disable = usbhsg_ep_disable, 623 624 .alloc_request = usbhsg_ep_alloc_request, 625 .free_request = usbhsg_ep_free_request, 626 627 .queue = usbhsg_ep_queue, 628 .dequeue = usbhsg_ep_dequeue, 629 630 .set_halt = usbhsg_ep_set_halt, 631 .set_wedge = usbhsg_ep_set_wedge, 632 }; 633 634 /* 635 * usb module start/end 636 */ 637 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 638 { 639 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 640 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 641 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 642 struct device *dev = usbhs_priv_to_dev(priv); 643 unsigned long flags; 644 int ret = 0; 645 646 /******************** spin lock ********************/ 647 usbhs_lock(priv, flags); 648 649 usbhsg_status_set(gpriv, status); 650 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 651 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 652 ret = -1; /* not ready */ 653 654 usbhs_unlock(priv, flags); 655 /******************** spin unlock ********************/ 656 657 if (ret < 0) 658 return 0; /* not ready is not error */ 659 660 /* 661 * enable interrupt and systems if ready 662 */ 663 dev_dbg(dev, "start gadget\n"); 664 665 /* 666 * pipe initialize and enable DCP 667 */ 668 usbhs_pipe_init(priv, 669 usbhsg_dma_map_ctrl); 670 usbhs_fifo_init(priv); 671 usbhsg_uep_init(gpriv); 672 673 /* dcp init */ 674 dcp->pipe = usbhs_dcp_malloc(priv); 675 dcp->pipe->mod_private = dcp; 676 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 677 678 /* 679 * system config enble 680 * - HI speed 681 * - function 682 * - usb module 683 */ 684 usbhs_sys_hispeed_ctrl(priv, 1); 685 usbhs_sys_function_ctrl(priv, 1); 686 usbhs_sys_usb_ctrl(priv, 1); 687 688 /* 689 * enable irq callback 690 */ 691 mod->irq_dev_state = usbhsg_irq_dev_state; 692 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 693 usbhs_irq_callback_update(priv, mod); 694 695 return 0; 696 } 697 698 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 699 { 700 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 701 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 702 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 703 struct device *dev = usbhs_priv_to_dev(priv); 704 unsigned long flags; 705 int ret = 0; 706 707 /******************** spin lock ********************/ 708 usbhs_lock(priv, flags); 709 710 usbhsg_status_clr(gpriv, status); 711 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 712 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 713 ret = -1; /* already done */ 714 715 usbhs_unlock(priv, flags); 716 /******************** spin unlock ********************/ 717 718 if (ret < 0) 719 return 0; /* already done is not error */ 720 721 /* 722 * disable interrupt and systems if 1st try 723 */ 724 usbhs_fifo_quit(priv); 725 726 /* disable all irq */ 727 mod->irq_dev_state = NULL; 728 mod->irq_ctrl_stage = NULL; 729 usbhs_irq_callback_update(priv, mod); 730 731 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 732 733 /* disable sys */ 734 usbhs_sys_hispeed_ctrl(priv, 0); 735 usbhs_sys_function_ctrl(priv, 0); 736 usbhs_sys_usb_ctrl(priv, 0); 737 738 usbhsg_pipe_disable(dcp); 739 740 dev_dbg(dev, "stop gadget\n"); 741 742 return 0; 743 } 744 745 /* 746 * 747 * linux usb function 748 * 749 */ 750 static int usbhsg_gadget_start(struct usb_gadget *gadget, 751 struct usb_gadget_driver *driver) 752 { 753 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 754 struct usbhs_priv *priv; 755 struct device *dev; 756 int ret; 757 758 if (!driver || 759 !driver->setup || 760 driver->speed != USB_SPEED_HIGH) 761 return -EINVAL; 762 763 dev = usbhsg_gpriv_to_dev(gpriv); 764 priv = usbhsg_gpriv_to_priv(gpriv); 765 766 /* first hook up the driver ... */ 767 gpriv->driver = driver; 768 gpriv->gadget.dev.driver = &driver->driver; 769 770 ret = device_add(&gpriv->gadget.dev); 771 if (ret) { 772 dev_err(dev, "device_add error %d\n", ret); 773 goto add_fail; 774 } 775 776 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 777 778 add_fail: 779 gpriv->driver = NULL; 780 gpriv->gadget.dev.driver = NULL; 781 782 return ret; 783 } 784 785 static int usbhsg_gadget_stop(struct usb_gadget *gadget, 786 struct usb_gadget_driver *driver) 787 { 788 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 789 struct usbhs_priv *priv; 790 struct device *dev; 791 792 if (!driver || 793 !driver->unbind) 794 return -EINVAL; 795 796 dev = usbhsg_gpriv_to_dev(gpriv); 797 priv = usbhsg_gpriv_to_priv(gpriv); 798 799 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 800 device_del(&gpriv->gadget.dev); 801 gpriv->driver = NULL; 802 803 return 0; 804 } 805 806 /* 807 * usb gadget ops 808 */ 809 static int usbhsg_get_frame(struct usb_gadget *gadget) 810 { 811 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 812 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 813 814 return usbhs_frame_get_num(priv); 815 } 816 817 static struct usb_gadget_ops usbhsg_gadget_ops = { 818 .get_frame = usbhsg_get_frame, 819 .udc_start = usbhsg_gadget_start, 820 .udc_stop = usbhsg_gadget_stop, 821 }; 822 823 static int usbhsg_start(struct usbhs_priv *priv) 824 { 825 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 826 } 827 828 static int usbhsg_stop(struct usbhs_priv *priv) 829 { 830 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 831 } 832 833 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv) 834 { 835 struct usbhsg_gpriv *gpriv; 836 struct usbhsg_uep *uep; 837 struct device *dev = usbhs_priv_to_dev(priv); 838 int pipe_size = usbhs_get_dparam(priv, pipe_size); 839 int i; 840 int ret; 841 842 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 843 if (!gpriv) { 844 dev_err(dev, "Could not allocate gadget priv\n"); 845 return -ENOMEM; 846 } 847 848 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); 849 if (!uep) { 850 dev_err(dev, "Could not allocate ep\n"); 851 ret = -ENOMEM; 852 goto usbhs_mod_gadget_probe_err_gpriv; 853 } 854 855 /* 856 * CAUTION 857 * 858 * There is no guarantee that it is possible to access usb module here. 859 * Don't accesses to it. 860 * The accesse will be enable after "usbhsg_start" 861 */ 862 863 /* 864 * register itself 865 */ 866 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 867 868 /* init gpriv */ 869 gpriv->mod.name = "gadget"; 870 gpriv->mod.start = usbhsg_start; 871 gpriv->mod.stop = usbhsg_stop; 872 gpriv->uep = uep; 873 gpriv->uep_size = pipe_size; 874 usbhsg_status_init(gpriv); 875 876 /* 877 * init gadget 878 */ 879 device_initialize(&gpriv->gadget.dev); 880 dev_set_name(&gpriv->gadget.dev, "gadget"); 881 gpriv->gadget.dev.parent = dev; 882 gpriv->gadget.name = "renesas_usbhs_udc"; 883 gpriv->gadget.ops = &usbhsg_gadget_ops; 884 gpriv->gadget.is_dualspeed = 1; 885 886 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 887 888 /* 889 * init usb_ep 890 */ 891 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 892 uep->gpriv = gpriv; 893 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 894 895 uep->ep.name = uep->ep_name; 896 uep->ep.ops = &usbhsg_ep_ops; 897 INIT_LIST_HEAD(&uep->ep.ep_list); 898 899 /* init DCP */ 900 if (usbhsg_is_dcp(uep)) { 901 gpriv->gadget.ep0 = &uep->ep; 902 uep->ep.maxpacket = 64; 903 } 904 /* init normal pipe */ 905 else { 906 uep->ep.maxpacket = 512; 907 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 908 } 909 } 910 911 usbhsg_controller_register(gpriv); 912 913 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 914 if (ret) 915 goto err_add_udc; 916 917 918 dev_info(dev, "gadget probed\n"); 919 920 return 0; 921 err_add_udc: 922 kfree(gpriv->uep); 923 924 usbhs_mod_gadget_probe_err_gpriv: 925 kfree(gpriv); 926 927 return ret; 928 } 929 930 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv) 931 { 932 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 933 934 usb_del_gadget_udc(&gpriv->gadget); 935 936 usbhsg_controller_unregister(gpriv); 937 938 kfree(gpriv->uep); 939 kfree(gpriv); 940 } 941