1 /* 2 * Renesas USB driver 3 * 4 * Copyright (C) 2011 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 15 * 16 */ 17 #include <linux/delay.h> 18 #include <linux/dma-mapping.h> 19 #include <linux/io.h> 20 #include <linux/module.h> 21 #include <linux/platform_device.h> 22 #include <linux/usb/ch9.h> 23 #include <linux/usb/gadget.h> 24 #include "common.h" 25 26 /* 27 * struct 28 */ 29 struct usbhsg_request { 30 struct usb_request req; 31 struct usbhs_pkt pkt; 32 }; 33 34 #define EP_NAME_SIZE 8 35 struct usbhsg_gpriv; 36 struct usbhsg_uep { 37 struct usb_ep ep; 38 struct usbhs_pipe *pipe; 39 40 char ep_name[EP_NAME_SIZE]; 41 42 struct usbhsg_gpriv *gpriv; 43 }; 44 45 struct usbhsg_gpriv { 46 struct usb_gadget gadget; 47 struct usbhs_mod mod; 48 49 struct usbhsg_uep *uep; 50 int uep_size; 51 52 struct usb_gadget_driver *driver; 53 54 u32 status; 55 #define USBHSG_STATUS_STARTED (1 << 0) 56 #define USBHSG_STATUS_REGISTERD (1 << 1) 57 #define USBHSG_STATUS_WEDGE (1 << 2) 58 }; 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 /* 118 * queue push/pop 119 */ 120 static void usbhsg_queue_pop(struct usbhsg_uep *uep, 121 struct usbhsg_request *ureq, 122 int status) 123 { 124 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 125 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 126 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 127 128 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); 129 130 ureq->req.status = status; 131 ureq->req.complete(&uep->ep, &ureq->req); 132 } 133 134 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 135 { 136 struct usbhs_pipe *pipe = pkt->pipe; 137 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 138 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 139 140 ureq->req.actual = pkt->actual; 141 142 usbhsg_queue_pop(uep, ureq, 0); 143 } 144 145 static void usbhsg_queue_push(struct usbhsg_uep *uep, 146 struct usbhsg_request *ureq) 147 { 148 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 149 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 150 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 151 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); 152 struct usb_request *req = &ureq->req; 153 154 req->actual = 0; 155 req->status = -EINPROGRESS; 156 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done, 157 req->buf, req->length, req->zero, -1); 158 usbhs_pkt_start(pipe); 159 160 dev_dbg(dev, "pipe %d : queue push (%d)\n", 161 usbhs_pipe_number(pipe), 162 req->length); 163 } 164 165 /* 166 * dma map/unmap 167 */ 168 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map) 169 { 170 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 171 struct usb_request *req = &ureq->req; 172 struct usbhs_pipe *pipe = pkt->pipe; 173 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 174 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 175 enum dma_data_direction dir; 176 int ret = 0; 177 178 dir = usbhs_pipe_is_dir_host(pipe); 179 180 if (map) { 181 /* it can not use scatter/gather */ 182 WARN_ON(req->num_sgs); 183 184 ret = usb_gadget_map_request(&gpriv->gadget, req, dir); 185 if (ret < 0) 186 return ret; 187 188 pkt->dma = req->dma; 189 } else { 190 usb_gadget_unmap_request(&gpriv->gadget, req, dir); 191 } 192 193 return ret; 194 } 195 196 /* 197 * USB_TYPE_STANDARD / clear feature functions 198 */ 199 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, 200 struct usbhsg_uep *uep, 201 struct usb_ctrlrequest *ctrl) 202 { 203 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 204 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 205 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 206 207 usbhs_dcp_control_transfer_done(pipe); 208 209 return 0; 210 } 211 212 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, 213 struct usbhsg_uep *uep, 214 struct usb_ctrlrequest *ctrl) 215 { 216 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 217 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 218 219 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { 220 usbhs_pipe_disable(pipe); 221 usbhs_pipe_sequence_data0(pipe); 222 usbhs_pipe_enable(pipe); 223 } 224 225 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 226 227 usbhs_pkt_start(pipe); 228 229 return 0; 230 } 231 232 struct usbhsg_recip_handle req_clear_feature = { 233 .name = "clear feature", 234 .device = usbhsg_recip_handler_std_control_done, 235 .interface = usbhsg_recip_handler_std_control_done, 236 .endpoint = usbhsg_recip_handler_std_clear_endpoint, 237 }; 238 239 /* 240 * USB_TYPE_STANDARD / set feature functions 241 */ 242 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv, 243 struct usbhsg_uep *uep, 244 struct usb_ctrlrequest *ctrl) 245 { 246 switch (le16_to_cpu(ctrl->wValue)) { 247 case USB_DEVICE_TEST_MODE: 248 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 249 udelay(100); 250 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8)); 251 break; 252 default: 253 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 254 break; 255 } 256 257 return 0; 258 } 259 260 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv, 261 struct usbhsg_uep *uep, 262 struct usb_ctrlrequest *ctrl) 263 { 264 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 265 266 usbhs_pipe_stall(pipe); 267 268 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 269 270 return 0; 271 } 272 273 struct usbhsg_recip_handle req_set_feature = { 274 .name = "set feature", 275 .device = usbhsg_recip_handler_std_set_device, 276 .interface = usbhsg_recip_handler_std_control_done, 277 .endpoint = usbhsg_recip_handler_std_set_endpoint, 278 }; 279 280 /* 281 * USB_TYPE_STANDARD / get status functions 282 */ 283 static void __usbhsg_recip_send_complete(struct usb_ep *ep, 284 struct usb_request *req) 285 { 286 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 287 288 /* free allocated recip-buffer/usb_request */ 289 kfree(ureq->pkt.buf); 290 usb_ep_free_request(ep, req); 291 } 292 293 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv, 294 unsigned short status) 295 { 296 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 297 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 298 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 299 struct usb_request *req; 300 unsigned short *buf; 301 302 /* alloc new usb_request for recip */ 303 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC); 304 if (!req) { 305 dev_err(dev, "recip request allocation fail\n"); 306 return; 307 } 308 309 /* alloc recip data buffer */ 310 buf = kmalloc(sizeof(*buf), GFP_ATOMIC); 311 if (!buf) { 312 usb_ep_free_request(&dcp->ep, req); 313 dev_err(dev, "recip data allocation fail\n"); 314 return; 315 } 316 317 /* recip data is status */ 318 *buf = cpu_to_le16(status); 319 320 /* allocated usb_request/buffer will be freed */ 321 req->complete = __usbhsg_recip_send_complete; 322 req->buf = buf; 323 req->length = sizeof(*buf); 324 req->zero = 0; 325 326 /* push packet */ 327 pipe->handler = &usbhs_fifo_pio_push_handler; 328 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req)); 329 } 330 331 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv, 332 struct usbhsg_uep *uep, 333 struct usb_ctrlrequest *ctrl) 334 { 335 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 336 unsigned short status = 1 << USB_DEVICE_SELF_POWERED; 337 338 __usbhsg_recip_send_status(gpriv, status); 339 340 return 0; 341 } 342 343 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv, 344 struct usbhsg_uep *uep, 345 struct usb_ctrlrequest *ctrl) 346 { 347 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 348 unsigned short status = 0; 349 350 __usbhsg_recip_send_status(gpriv, status); 351 352 return 0; 353 } 354 355 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv, 356 struct usbhsg_uep *uep, 357 struct usb_ctrlrequest *ctrl) 358 { 359 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 360 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 361 unsigned short status = 0; 362 363 if (usbhs_pipe_is_stall(pipe)) 364 status = 1 << USB_ENDPOINT_HALT; 365 366 __usbhsg_recip_send_status(gpriv, status); 367 368 return 0; 369 } 370 371 struct usbhsg_recip_handle req_get_status = { 372 .name = "get status", 373 .device = usbhsg_recip_handler_std_get_device, 374 .interface = usbhsg_recip_handler_std_get_interface, 375 .endpoint = usbhsg_recip_handler_std_get_endpoint, 376 }; 377 378 /* 379 * USB_TYPE handler 380 */ 381 static int usbhsg_recip_run_handle(struct usbhs_priv *priv, 382 struct usbhsg_recip_handle *handler, 383 struct usb_ctrlrequest *ctrl) 384 { 385 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 386 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 387 struct usbhsg_uep *uep; 388 struct usbhs_pipe *pipe; 389 int recip = ctrl->bRequestType & USB_RECIP_MASK; 390 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; 391 int ret = 0; 392 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 393 struct usb_ctrlrequest *ctrl); 394 char *msg; 395 396 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth); 397 pipe = usbhsg_uep_to_pipe(uep); 398 if (!pipe) { 399 dev_err(dev, "wrong recip request\n"); 400 return -EINVAL; 401 } 402 403 switch (recip) { 404 case USB_RECIP_DEVICE: 405 msg = "DEVICE"; 406 func = handler->device; 407 break; 408 case USB_RECIP_INTERFACE: 409 msg = "INTERFACE"; 410 func = handler->interface; 411 break; 412 case USB_RECIP_ENDPOINT: 413 msg = "ENDPOINT"; 414 func = handler->endpoint; 415 break; 416 default: 417 dev_warn(dev, "unsupported RECIP(%d)\n", recip); 418 func = NULL; 419 ret = -EINVAL; 420 } 421 422 if (func) { 423 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg); 424 ret = func(priv, uep, ctrl); 425 } 426 427 return ret; 428 } 429 430 /* 431 * irq functions 432 * 433 * it will be called from usbhs_interrupt 434 */ 435 static int usbhsg_irq_dev_state(struct usbhs_priv *priv, 436 struct usbhs_irq_state *irq_state) 437 { 438 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 439 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 440 441 gpriv->gadget.speed = usbhs_bus_get_speed(priv); 442 443 dev_dbg(dev, "state = %x : speed : %d\n", 444 usbhs_status_get_device_state(irq_state), 445 gpriv->gadget.speed); 446 447 return 0; 448 } 449 450 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv, 451 struct usbhs_irq_state *irq_state) 452 { 453 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 454 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 455 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 456 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 457 struct usb_ctrlrequest ctrl; 458 struct usbhsg_recip_handle *recip_handler = NULL; 459 int stage = usbhs_status_get_ctrl_stage(irq_state); 460 int ret = 0; 461 462 dev_dbg(dev, "stage = %d\n", stage); 463 464 /* 465 * see Manual 466 * 467 * "Operation" 468 * - "Interrupt Function" 469 * - "Control Transfer Stage Transition Interrupt" 470 * - Fig. "Control Transfer Stage Transitions" 471 */ 472 473 switch (stage) { 474 case READ_DATA_STAGE: 475 pipe->handler = &usbhs_fifo_pio_push_handler; 476 break; 477 case WRITE_DATA_STAGE: 478 pipe->handler = &usbhs_fifo_pio_pop_handler; 479 break; 480 case NODATA_STATUS_STAGE: 481 pipe->handler = &usbhs_ctrl_stage_end_handler; 482 break; 483 default: 484 return ret; 485 } 486 487 /* 488 * get usb request 489 */ 490 usbhs_usbreq_get_val(priv, &ctrl); 491 492 switch (ctrl.bRequestType & USB_TYPE_MASK) { 493 case USB_TYPE_STANDARD: 494 switch (ctrl.bRequest) { 495 case USB_REQ_CLEAR_FEATURE: 496 recip_handler = &req_clear_feature; 497 break; 498 case USB_REQ_SET_FEATURE: 499 recip_handler = &req_set_feature; 500 break; 501 case USB_REQ_GET_STATUS: 502 recip_handler = &req_get_status; 503 break; 504 } 505 } 506 507 /* 508 * setup stage / run recip 509 */ 510 if (recip_handler) 511 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl); 512 else 513 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl); 514 515 if (ret < 0) 516 usbhs_pipe_stall(pipe); 517 518 return ret; 519 } 520 521 /* 522 * 523 * usb_dcp_ops 524 * 525 */ 526 static int usbhsg_pipe_disable(struct usbhsg_uep *uep) 527 { 528 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 529 struct usbhs_pkt *pkt; 530 531 while (1) { 532 pkt = usbhs_pkt_pop(pipe, NULL); 533 if (!pkt) 534 break; 535 536 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET); 537 } 538 539 usbhs_pipe_disable(pipe); 540 541 return 0; 542 } 543 544 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv) 545 { 546 int i; 547 struct usbhsg_uep *uep; 548 549 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) 550 uep->pipe = NULL; 551 } 552 553 /* 554 * 555 * usb_ep_ops 556 * 557 */ 558 static int usbhsg_ep_enable(struct usb_ep *ep, 559 const struct usb_endpoint_descriptor *desc) 560 { 561 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 562 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 563 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 564 struct usbhs_pipe *pipe; 565 int ret = -EIO; 566 567 /* 568 * if it already have pipe, 569 * nothing to do 570 */ 571 if (uep->pipe) { 572 usbhs_pipe_clear(uep->pipe); 573 usbhs_pipe_sequence_data0(uep->pipe); 574 return 0; 575 } 576 577 pipe = usbhs_pipe_malloc(priv, 578 usb_endpoint_type(desc), 579 usb_endpoint_dir_in(desc)); 580 if (pipe) { 581 uep->pipe = pipe; 582 pipe->mod_private = uep; 583 584 /* set epnum / maxp */ 585 usbhs_pipe_config_update(pipe, 0, 586 usb_endpoint_num(desc), 587 usb_endpoint_maxp(desc)); 588 589 /* 590 * usbhs_fifo_dma_push/pop_handler try to 591 * use dmaengine if possible. 592 * It will use pio handler if impossible. 593 */ 594 if (usb_endpoint_dir_in(desc)) 595 pipe->handler = &usbhs_fifo_dma_push_handler; 596 else 597 pipe->handler = &usbhs_fifo_dma_pop_handler; 598 599 ret = 0; 600 } 601 602 return ret; 603 } 604 605 static int usbhsg_ep_disable(struct usb_ep *ep) 606 { 607 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 608 609 return usbhsg_pipe_disable(uep); 610 } 611 612 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 613 gfp_t gfp_flags) 614 { 615 struct usbhsg_request *ureq; 616 617 ureq = kzalloc(sizeof *ureq, gfp_flags); 618 if (!ureq) 619 return NULL; 620 621 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 622 623 return &ureq->req; 624 } 625 626 static void usbhsg_ep_free_request(struct usb_ep *ep, 627 struct usb_request *req) 628 { 629 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 630 631 WARN_ON(!list_empty(&ureq->pkt.node)); 632 kfree(ureq); 633 } 634 635 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 636 gfp_t gfp_flags) 637 { 638 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 639 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 640 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 641 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 642 643 /* param check */ 644 if (usbhsg_is_not_connected(gpriv) || 645 unlikely(!gpriv->driver) || 646 unlikely(!pipe)) 647 return -ESHUTDOWN; 648 649 usbhsg_queue_push(uep, ureq); 650 651 return 0; 652 } 653 654 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 655 { 656 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 657 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 658 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 659 660 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 661 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 662 663 return 0; 664 } 665 666 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 667 { 668 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 669 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 670 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 671 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 672 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 673 unsigned long flags; 674 675 usbhsg_pipe_disable(uep); 676 677 dev_dbg(dev, "set halt %d (pipe %d)\n", 678 halt, usbhs_pipe_number(pipe)); 679 680 /******************** spin lock ********************/ 681 usbhs_lock(priv, flags); 682 683 if (halt) 684 usbhs_pipe_stall(pipe); 685 else 686 usbhs_pipe_disable(pipe); 687 688 if (halt && wedge) 689 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 690 else 691 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 692 693 usbhs_unlock(priv, flags); 694 /******************** spin unlock ******************/ 695 696 return 0; 697 } 698 699 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 700 { 701 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 702 } 703 704 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 705 { 706 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 707 } 708 709 static struct usb_ep_ops usbhsg_ep_ops = { 710 .enable = usbhsg_ep_enable, 711 .disable = usbhsg_ep_disable, 712 713 .alloc_request = usbhsg_ep_alloc_request, 714 .free_request = usbhsg_ep_free_request, 715 716 .queue = usbhsg_ep_queue, 717 .dequeue = usbhsg_ep_dequeue, 718 719 .set_halt = usbhsg_ep_set_halt, 720 .set_wedge = usbhsg_ep_set_wedge, 721 }; 722 723 /* 724 * usb module start/end 725 */ 726 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 727 { 728 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 729 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 730 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 731 struct device *dev = usbhs_priv_to_dev(priv); 732 unsigned long flags; 733 int ret = 0; 734 735 /******************** spin lock ********************/ 736 usbhs_lock(priv, flags); 737 738 usbhsg_status_set(gpriv, status); 739 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 740 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 741 ret = -1; /* not ready */ 742 743 usbhs_unlock(priv, flags); 744 /******************** spin unlock ********************/ 745 746 if (ret < 0) 747 return 0; /* not ready is not error */ 748 749 /* 750 * enable interrupt and systems if ready 751 */ 752 dev_dbg(dev, "start gadget\n"); 753 754 /* 755 * pipe initialize and enable DCP 756 */ 757 usbhs_pipe_init(priv, 758 usbhsg_dma_map_ctrl); 759 usbhs_fifo_init(priv); 760 usbhsg_uep_init(gpriv); 761 762 /* dcp init */ 763 dcp->pipe = usbhs_dcp_malloc(priv); 764 dcp->pipe->mod_private = dcp; 765 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 766 767 /* 768 * system config enble 769 * - HI speed 770 * - function 771 * - usb module 772 */ 773 usbhs_sys_function_ctrl(priv, 1); 774 775 /* 776 * enable irq callback 777 */ 778 mod->irq_dev_state = usbhsg_irq_dev_state; 779 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 780 usbhs_irq_callback_update(priv, mod); 781 782 return 0; 783 } 784 785 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 786 { 787 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 788 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 789 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 790 struct device *dev = usbhs_priv_to_dev(priv); 791 unsigned long flags; 792 int ret = 0; 793 794 /******************** spin lock ********************/ 795 usbhs_lock(priv, flags); 796 797 usbhsg_status_clr(gpriv, status); 798 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 799 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 800 ret = -1; /* already done */ 801 802 usbhs_unlock(priv, flags); 803 /******************** spin unlock ********************/ 804 805 if (ret < 0) 806 return 0; /* already done is not error */ 807 808 /* 809 * disable interrupt and systems if 1st try 810 */ 811 usbhs_fifo_quit(priv); 812 813 /* disable all irq */ 814 mod->irq_dev_state = NULL; 815 mod->irq_ctrl_stage = NULL; 816 usbhs_irq_callback_update(priv, mod); 817 818 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 819 820 /* disable sys */ 821 usbhs_sys_set_test_mode(priv, 0); 822 usbhs_sys_function_ctrl(priv, 0); 823 824 usbhsg_pipe_disable(dcp); 825 826 dev_dbg(dev, "stop gadget\n"); 827 828 return 0; 829 } 830 831 /* 832 * 833 * linux usb function 834 * 835 */ 836 static int usbhsg_gadget_start(struct usb_gadget *gadget, 837 struct usb_gadget_driver *driver) 838 { 839 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 840 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 841 842 if (!driver || 843 !driver->setup || 844 driver->max_speed < USB_SPEED_FULL) 845 return -EINVAL; 846 847 /* first hook up the driver ... */ 848 gpriv->driver = driver; 849 gpriv->gadget.dev.driver = &driver->driver; 850 851 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 852 } 853 854 static int usbhsg_gadget_stop(struct usb_gadget *gadget, 855 struct usb_gadget_driver *driver) 856 { 857 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 858 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 859 860 if (!driver || 861 !driver->unbind) 862 return -EINVAL; 863 864 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 865 gpriv->gadget.dev.driver = NULL; 866 gpriv->driver = NULL; 867 868 return 0; 869 } 870 871 /* 872 * usb gadget ops 873 */ 874 static int usbhsg_get_frame(struct usb_gadget *gadget) 875 { 876 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 877 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 878 879 return usbhs_frame_get_num(priv); 880 } 881 882 static struct usb_gadget_ops usbhsg_gadget_ops = { 883 .get_frame = usbhsg_get_frame, 884 .udc_start = usbhsg_gadget_start, 885 .udc_stop = usbhsg_gadget_stop, 886 }; 887 888 static int usbhsg_start(struct usbhs_priv *priv) 889 { 890 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 891 } 892 893 static int usbhsg_stop(struct usbhs_priv *priv) 894 { 895 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 896 897 /* cable disconnect */ 898 if (gpriv->driver && 899 gpriv->driver->disconnect) 900 gpriv->driver->disconnect(&gpriv->gadget); 901 902 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 903 } 904 905 static void usbhs_mod_gadget_release(struct device *pdev) 906 { 907 /* do nothing */ 908 } 909 910 int usbhs_mod_gadget_probe(struct usbhs_priv *priv) 911 { 912 struct usbhsg_gpriv *gpriv; 913 struct usbhsg_uep *uep; 914 struct device *dev = usbhs_priv_to_dev(priv); 915 int pipe_size = usbhs_get_dparam(priv, pipe_size); 916 int i; 917 int ret; 918 919 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 920 if (!gpriv) { 921 dev_err(dev, "Could not allocate gadget priv\n"); 922 return -ENOMEM; 923 } 924 925 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); 926 if (!uep) { 927 dev_err(dev, "Could not allocate ep\n"); 928 ret = -ENOMEM; 929 goto usbhs_mod_gadget_probe_err_gpriv; 930 } 931 932 /* 933 * CAUTION 934 * 935 * There is no guarantee that it is possible to access usb module here. 936 * Don't accesses to it. 937 * The accesse will be enable after "usbhsg_start" 938 */ 939 940 /* 941 * register itself 942 */ 943 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 944 945 /* init gpriv */ 946 gpriv->mod.name = "gadget"; 947 gpriv->mod.start = usbhsg_start; 948 gpriv->mod.stop = usbhsg_stop; 949 gpriv->uep = uep; 950 gpriv->uep_size = pipe_size; 951 usbhsg_status_init(gpriv); 952 953 /* 954 * init gadget 955 */ 956 dev_set_name(&gpriv->gadget.dev, "gadget"); 957 gpriv->gadget.dev.parent = dev; 958 gpriv->gadget.dev.release = usbhs_mod_gadget_release; 959 gpriv->gadget.name = "renesas_usbhs_udc"; 960 gpriv->gadget.ops = &usbhsg_gadget_ops; 961 gpriv->gadget.max_speed = USB_SPEED_HIGH; 962 ret = device_register(&gpriv->gadget.dev); 963 if (ret < 0) 964 goto err_add_udc; 965 966 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 967 968 /* 969 * init usb_ep 970 */ 971 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 972 uep->gpriv = gpriv; 973 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 974 975 uep->ep.name = uep->ep_name; 976 uep->ep.ops = &usbhsg_ep_ops; 977 INIT_LIST_HEAD(&uep->ep.ep_list); 978 979 /* init DCP */ 980 if (usbhsg_is_dcp(uep)) { 981 gpriv->gadget.ep0 = &uep->ep; 982 uep->ep.maxpacket = 64; 983 } 984 /* init normal pipe */ 985 else { 986 uep->ep.maxpacket = 512; 987 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 988 } 989 } 990 991 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 992 if (ret) 993 goto err_register; 994 995 996 dev_info(dev, "gadget probed\n"); 997 998 return 0; 999 1000 err_register: 1001 device_unregister(&gpriv->gadget.dev); 1002 err_add_udc: 1003 kfree(gpriv->uep); 1004 1005 usbhs_mod_gadget_probe_err_gpriv: 1006 kfree(gpriv); 1007 1008 return ret; 1009 } 1010 1011 void usbhs_mod_gadget_remove(struct usbhs_priv *priv) 1012 { 1013 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1014 1015 usb_del_gadget_udc(&gpriv->gadget); 1016 1017 device_unregister(&gpriv->gadget.dev); 1018 1019 kfree(gpriv->uep); 1020 kfree(gpriv); 1021 } 1022