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