1 /* 2 * Renesas USB driver 3 * 4 * Copyright (C) 2011 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 15 * 16 */ 17 #include <linux/delay.h> 18 #include <linux/dma-mapping.h> 19 #include <linux/io.h> 20 #include <linux/module.h> 21 #include <linux/platform_device.h> 22 #include <linux/usb/ch9.h> 23 #include <linux/usb/gadget.h> 24 #include <linux/usb/otg.h> 25 #include "common.h" 26 27 /* 28 * struct 29 */ 30 struct usbhsg_request { 31 struct usb_request req; 32 struct usbhs_pkt pkt; 33 }; 34 35 #define EP_NAME_SIZE 8 36 struct usbhsg_gpriv; 37 struct usbhsg_uep { 38 struct usb_ep ep; 39 struct usbhs_pipe *pipe; 40 41 char ep_name[EP_NAME_SIZE]; 42 43 struct usbhsg_gpriv *gpriv; 44 }; 45 46 struct usbhsg_gpriv { 47 struct usb_gadget gadget; 48 struct usbhs_mod mod; 49 50 struct usbhsg_uep *uep; 51 int uep_size; 52 53 struct usb_gadget_driver *driver; 54 struct usb_phy *transceiver; 55 bool vbus_active; 56 57 u32 status; 58 #define USBHSG_STATUS_STARTED (1 << 0) 59 #define USBHSG_STATUS_REGISTERD (1 << 1) 60 #define USBHSG_STATUS_WEDGE (1 << 2) 61 #define USBHSG_STATUS_SELF_POWERED (1 << 3) 62 #define USBHSG_STATUS_SOFT_CONNECT (1 << 4) 63 }; 64 65 struct usbhsg_recip_handle { 66 char *name; 67 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 68 struct usb_ctrlrequest *ctrl); 69 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 70 struct usb_ctrlrequest *ctrl); 71 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 72 struct usb_ctrlrequest *ctrl); 73 }; 74 75 /* 76 * macro 77 */ 78 #define usbhsg_priv_to_gpriv(priv) \ 79 container_of( \ 80 usbhs_mod_get(priv, USBHS_GADGET), \ 81 struct usbhsg_gpriv, mod) 82 83 #define __usbhsg_for_each_uep(start, pos, g, i) \ 84 for ((i) = start; \ 85 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \ 86 (i)++) 87 88 #define usbhsg_for_each_uep(pos, gpriv, i) \ 89 __usbhsg_for_each_uep(1, pos, gpriv, i) 90 91 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \ 92 __usbhsg_for_each_uep(0, pos, gpriv, i) 93 94 #define usbhsg_gadget_to_gpriv(g)\ 95 container_of(g, struct usbhsg_gpriv, gadget) 96 97 #define usbhsg_req_to_ureq(r)\ 98 container_of(r, struct usbhsg_request, req) 99 100 #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep) 101 #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv) 102 #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv) 103 #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep) 104 #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i) 105 #define usbhsg_uep_to_gpriv(u) ((u)->gpriv) 106 #define usbhsg_uep_to_pipe(u) ((u)->pipe) 107 #define usbhsg_pipe_to_uep(p) ((p)->mod_private) 108 #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv)) 109 110 #define usbhsg_ureq_to_pkt(u) (&(u)->pkt) 111 #define usbhsg_pkt_to_ureq(i) \ 112 container_of(i, struct usbhsg_request, pkt) 113 114 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN) 115 116 /* status */ 117 #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0) 118 #define usbhsg_status_set(gp, b) (gp->status |= b) 119 #define usbhsg_status_clr(gp, b) (gp->status &= ~b) 120 #define usbhsg_status_has(gp, b) (gp->status & b) 121 122 /* 123 * queue push/pop 124 */ 125 static void __usbhsg_queue_pop(struct usbhsg_uep *uep, 126 struct usbhsg_request *ureq, 127 int status) 128 { 129 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 130 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 131 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 132 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 133 134 if (pipe) 135 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); 136 137 ureq->req.status = status; 138 spin_unlock(usbhs_priv_to_lock(priv)); 139 usb_gadget_giveback_request(&uep->ep, &ureq->req); 140 spin_lock(usbhs_priv_to_lock(priv)); 141 } 142 143 static void usbhsg_queue_pop(struct usbhsg_uep *uep, 144 struct usbhsg_request *ureq, 145 int status) 146 { 147 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 148 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 149 unsigned long flags; 150 151 usbhs_lock(priv, flags); 152 __usbhsg_queue_pop(uep, ureq, status); 153 usbhs_unlock(priv, flags); 154 } 155 156 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 157 { 158 struct usbhs_pipe *pipe = pkt->pipe; 159 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 160 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 161 unsigned long flags; 162 163 ureq->req.actual = pkt->actual; 164 165 usbhs_lock(priv, flags); 166 if (uep) 167 __usbhsg_queue_pop(uep, ureq, 0); 168 usbhs_unlock(priv, flags); 169 } 170 171 static void usbhsg_queue_push(struct usbhsg_uep *uep, 172 struct usbhsg_request *ureq) 173 { 174 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 175 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 176 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 177 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); 178 struct usb_request *req = &ureq->req; 179 180 req->actual = 0; 181 req->status = -EINPROGRESS; 182 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done, 183 req->buf, req->length, req->zero, -1); 184 usbhs_pkt_start(pipe); 185 186 dev_dbg(dev, "pipe %d : queue push (%d)\n", 187 usbhs_pipe_number(pipe), 188 req->length); 189 } 190 191 /* 192 * dma map/unmap 193 */ 194 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt, 195 int map) 196 { 197 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 198 struct usb_request *req = &ureq->req; 199 struct usbhs_pipe *pipe = pkt->pipe; 200 enum dma_data_direction dir; 201 int ret = 0; 202 203 dir = usbhs_pipe_is_dir_host(pipe); 204 205 if (map) { 206 /* it can not use scatter/gather */ 207 WARN_ON(req->num_sgs); 208 209 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir); 210 if (ret < 0) 211 return ret; 212 213 pkt->dma = req->dma; 214 } else { 215 usb_gadget_unmap_request_by_dev(dma_dev, req, dir); 216 } 217 218 return ret; 219 } 220 221 /* 222 * USB_TYPE_STANDARD / clear feature functions 223 */ 224 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, 225 struct usbhsg_uep *uep, 226 struct usb_ctrlrequest *ctrl) 227 { 228 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 229 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 230 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 231 232 usbhs_dcp_control_transfer_done(pipe); 233 234 return 0; 235 } 236 237 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, 238 struct usbhsg_uep *uep, 239 struct usb_ctrlrequest *ctrl) 240 { 241 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 242 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 243 244 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { 245 usbhs_pipe_disable(pipe); 246 usbhs_pipe_sequence_data0(pipe); 247 usbhs_pipe_enable(pipe); 248 } 249 250 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 251 252 usbhs_pkt_start(pipe); 253 254 return 0; 255 } 256 257 static struct usbhsg_recip_handle req_clear_feature = { 258 .name = "clear feature", 259 .device = usbhsg_recip_handler_std_control_done, 260 .interface = usbhsg_recip_handler_std_control_done, 261 .endpoint = usbhsg_recip_handler_std_clear_endpoint, 262 }; 263 264 /* 265 * USB_TYPE_STANDARD / set feature functions 266 */ 267 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv, 268 struct usbhsg_uep *uep, 269 struct usb_ctrlrequest *ctrl) 270 { 271 switch (le16_to_cpu(ctrl->wValue)) { 272 case USB_DEVICE_TEST_MODE: 273 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 274 udelay(100); 275 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8)); 276 break; 277 default: 278 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 279 break; 280 } 281 282 return 0; 283 } 284 285 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv, 286 struct usbhsg_uep *uep, 287 struct usb_ctrlrequest *ctrl) 288 { 289 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 290 291 usbhs_pipe_stall(pipe); 292 293 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 294 295 return 0; 296 } 297 298 static struct usbhsg_recip_handle req_set_feature = { 299 .name = "set feature", 300 .device = usbhsg_recip_handler_std_set_device, 301 .interface = usbhsg_recip_handler_std_control_done, 302 .endpoint = usbhsg_recip_handler_std_set_endpoint, 303 }; 304 305 /* 306 * USB_TYPE_STANDARD / get status functions 307 */ 308 static void __usbhsg_recip_send_complete(struct usb_ep *ep, 309 struct usb_request *req) 310 { 311 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 312 313 /* free allocated recip-buffer/usb_request */ 314 kfree(ureq->pkt.buf); 315 usb_ep_free_request(ep, req); 316 } 317 318 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv, 319 unsigned short status) 320 { 321 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 322 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 323 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 324 struct usb_request *req; 325 unsigned short *buf; 326 327 /* alloc new usb_request for recip */ 328 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC); 329 if (!req) { 330 dev_err(dev, "recip request allocation fail\n"); 331 return; 332 } 333 334 /* alloc recip data buffer */ 335 buf = kmalloc(sizeof(*buf), GFP_ATOMIC); 336 if (!buf) { 337 usb_ep_free_request(&dcp->ep, req); 338 dev_err(dev, "recip data allocation fail\n"); 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; 624 625 ret = 0; 626 } 627 628 usbhsg_ep_enable_end: 629 usbhs_unlock(priv, flags); 630 631 return ret; 632 } 633 634 static int usbhsg_ep_disable(struct usb_ep *ep) 635 { 636 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 637 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 638 639 if (!pipe) 640 return -EINVAL; 641 642 usbhsg_pipe_disable(uep); 643 usbhs_pipe_free(pipe); 644 645 uep->pipe->mod_private = NULL; 646 uep->pipe = NULL; 647 648 return 0; 649 } 650 651 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 652 gfp_t gfp_flags) 653 { 654 struct usbhsg_request *ureq; 655 656 ureq = kzalloc(sizeof *ureq, gfp_flags); 657 if (!ureq) 658 return NULL; 659 660 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 661 662 return &ureq->req; 663 } 664 665 static void usbhsg_ep_free_request(struct usb_ep *ep, 666 struct usb_request *req) 667 { 668 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 669 670 WARN_ON(!list_empty(&ureq->pkt.node)); 671 kfree(ureq); 672 } 673 674 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 675 gfp_t gfp_flags) 676 { 677 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 678 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 679 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 680 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 681 682 /* param check */ 683 if (usbhsg_is_not_connected(gpriv) || 684 unlikely(!gpriv->driver) || 685 unlikely(!pipe)) 686 return -ESHUTDOWN; 687 688 usbhsg_queue_push(uep, ureq); 689 690 return 0; 691 } 692 693 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 694 { 695 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 696 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 697 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 698 699 if (pipe) 700 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 701 702 /* 703 * To dequeue a request, this driver should call the usbhsg_queue_pop() 704 * even if the pipe is NULL. 705 */ 706 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 707 708 return 0; 709 } 710 711 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 712 { 713 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 714 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 715 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 716 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 717 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 718 unsigned long flags; 719 720 usbhsg_pipe_disable(uep); 721 722 dev_dbg(dev, "set halt %d (pipe %d)\n", 723 halt, usbhs_pipe_number(pipe)); 724 725 /******************** spin lock ********************/ 726 usbhs_lock(priv, flags); 727 728 if (halt) 729 usbhs_pipe_stall(pipe); 730 else 731 usbhs_pipe_disable(pipe); 732 733 if (halt && wedge) 734 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 735 else 736 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 737 738 usbhs_unlock(priv, flags); 739 /******************** spin unlock ******************/ 740 741 return 0; 742 } 743 744 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 745 { 746 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 747 } 748 749 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 750 { 751 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 752 } 753 754 static struct usb_ep_ops usbhsg_ep_ops = { 755 .enable = usbhsg_ep_enable, 756 .disable = usbhsg_ep_disable, 757 758 .alloc_request = usbhsg_ep_alloc_request, 759 .free_request = usbhsg_ep_free_request, 760 761 .queue = usbhsg_ep_queue, 762 .dequeue = usbhsg_ep_dequeue, 763 764 .set_halt = usbhsg_ep_set_halt, 765 .set_wedge = usbhsg_ep_set_wedge, 766 }; 767 768 /* 769 * pullup control 770 */ 771 static int usbhsg_can_pullup(struct usbhs_priv *priv) 772 { 773 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 774 775 return gpriv->driver && 776 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT); 777 } 778 779 static void usbhsg_update_pullup(struct usbhs_priv *priv) 780 { 781 if (usbhsg_can_pullup(priv)) 782 usbhs_sys_function_pullup(priv, 1); 783 else 784 usbhs_sys_function_pullup(priv, 0); 785 } 786 787 /* 788 * usb module start/end 789 */ 790 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 791 { 792 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 793 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 794 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 795 struct device *dev = usbhs_priv_to_dev(priv); 796 unsigned long flags; 797 int ret = 0; 798 799 /******************** spin lock ********************/ 800 usbhs_lock(priv, flags); 801 802 usbhsg_status_set(gpriv, status); 803 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 804 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 805 ret = -1; /* not ready */ 806 807 usbhs_unlock(priv, flags); 808 /******************** spin unlock ********************/ 809 810 if (ret < 0) 811 return 0; /* not ready is not error */ 812 813 /* 814 * enable interrupt and systems if ready 815 */ 816 dev_dbg(dev, "start gadget\n"); 817 818 /* 819 * pipe initialize and enable DCP 820 */ 821 usbhs_fifo_init(priv); 822 usbhs_pipe_init(priv, 823 usbhsg_dma_map_ctrl); 824 825 /* dcp init instead of usbhsg_ep_enable() */ 826 dcp->pipe = usbhs_dcp_malloc(priv); 827 dcp->pipe->mod_private = dcp; 828 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 829 830 /* 831 * system config enble 832 * - HI speed 833 * - function 834 * - usb module 835 */ 836 usbhs_sys_function_ctrl(priv, 1); 837 usbhsg_update_pullup(priv); 838 839 /* 840 * enable irq callback 841 */ 842 mod->irq_dev_state = usbhsg_irq_dev_state; 843 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 844 usbhs_irq_callback_update(priv, mod); 845 846 return 0; 847 } 848 849 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 850 { 851 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 852 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 853 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 854 struct device *dev = usbhs_priv_to_dev(priv); 855 unsigned long flags; 856 int ret = 0; 857 858 /******************** spin lock ********************/ 859 usbhs_lock(priv, flags); 860 861 usbhsg_status_clr(gpriv, status); 862 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 863 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 864 ret = -1; /* already done */ 865 866 usbhs_unlock(priv, flags); 867 /******************** spin unlock ********************/ 868 869 if (ret < 0) 870 return 0; /* already done is not error */ 871 872 /* 873 * disable interrupt and systems if 1st try 874 */ 875 usbhs_fifo_quit(priv); 876 877 /* disable all irq */ 878 mod->irq_dev_state = NULL; 879 mod->irq_ctrl_stage = NULL; 880 usbhs_irq_callback_update(priv, mod); 881 882 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 883 884 /* disable sys */ 885 usbhs_sys_set_test_mode(priv, 0); 886 usbhs_sys_function_ctrl(priv, 0); 887 888 usbhsg_ep_disable(&dcp->ep); 889 890 dev_dbg(dev, "stop gadget\n"); 891 892 return 0; 893 } 894 895 /* 896 * VBUS provided by the PHY 897 */ 898 static int usbhsm_phy_get_vbus(struct platform_device *pdev) 899 { 900 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 901 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 902 903 return gpriv->vbus_active; 904 } 905 906 static void usbhs_mod_phy_mode(struct usbhs_priv *priv) 907 { 908 struct usbhs_mod_info *info = &priv->mod_info; 909 910 info->irq_vbus = NULL; 911 priv->pfunc.get_vbus = usbhsm_phy_get_vbus; 912 913 usbhs_irq_callback_update(priv, NULL); 914 } 915 916 /* 917 * 918 * linux usb function 919 * 920 */ 921 static int usbhsg_gadget_start(struct usb_gadget *gadget, 922 struct usb_gadget_driver *driver) 923 { 924 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 925 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 926 struct device *dev = usbhs_priv_to_dev(priv); 927 int ret; 928 929 if (!driver || 930 !driver->setup || 931 driver->max_speed < USB_SPEED_FULL) 932 return -EINVAL; 933 934 /* connect to bus through transceiver */ 935 if (!IS_ERR_OR_NULL(gpriv->transceiver)) { 936 ret = otg_set_peripheral(gpriv->transceiver->otg, 937 &gpriv->gadget); 938 if (ret) { 939 dev_err(dev, "%s: can't bind to transceiver\n", 940 gpriv->gadget.name); 941 return ret; 942 } 943 944 /* get vbus using phy versions */ 945 usbhs_mod_phy_mode(priv); 946 } 947 948 /* first hook up the driver ... */ 949 gpriv->driver = driver; 950 951 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 952 } 953 954 static int usbhsg_gadget_stop(struct usb_gadget *gadget) 955 { 956 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 957 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 958 959 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 960 961 if (!IS_ERR_OR_NULL(gpriv->transceiver)) 962 otg_set_peripheral(gpriv->transceiver->otg, NULL); 963 964 gpriv->driver = NULL; 965 966 return 0; 967 } 968 969 /* 970 * usb gadget ops 971 */ 972 static int usbhsg_get_frame(struct usb_gadget *gadget) 973 { 974 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 975 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 976 977 return usbhs_frame_get_num(priv); 978 } 979 980 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on) 981 { 982 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 983 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 984 unsigned long flags; 985 986 usbhs_lock(priv, flags); 987 if (is_on) 988 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT); 989 else 990 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT); 991 usbhsg_update_pullup(priv); 992 usbhs_unlock(priv, flags); 993 994 return 0; 995 } 996 997 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self) 998 { 999 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1000 1001 if (is_self) 1002 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED); 1003 else 1004 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED); 1005 1006 gadget->is_selfpowered = (is_self != 0); 1007 1008 return 0; 1009 } 1010 1011 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active) 1012 { 1013 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1014 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1015 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 1016 1017 gpriv->vbus_active = !!is_active; 1018 1019 renesas_usbhs_call_notify_hotplug(pdev); 1020 1021 return 0; 1022 } 1023 1024 static const struct usb_gadget_ops usbhsg_gadget_ops = { 1025 .get_frame = usbhsg_get_frame, 1026 .set_selfpowered = usbhsg_set_selfpowered, 1027 .udc_start = usbhsg_gadget_start, 1028 .udc_stop = usbhsg_gadget_stop, 1029 .pullup = usbhsg_pullup, 1030 .vbus_session = usbhsg_vbus_session, 1031 }; 1032 1033 static int usbhsg_start(struct usbhs_priv *priv) 1034 { 1035 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 1036 } 1037 1038 static int usbhsg_stop(struct usbhs_priv *priv) 1039 { 1040 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1041 1042 /* cable disconnect */ 1043 if (gpriv->driver && 1044 gpriv->driver->disconnect) 1045 gpriv->driver->disconnect(&gpriv->gadget); 1046 1047 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 1048 } 1049 1050 int usbhs_mod_gadget_probe(struct usbhs_priv *priv) 1051 { 1052 struct usbhsg_gpriv *gpriv; 1053 struct usbhsg_uep *uep; 1054 struct device *dev = usbhs_priv_to_dev(priv); 1055 struct renesas_usbhs_driver_pipe_config *pipe_configs = 1056 usbhs_get_dparam(priv, pipe_configs); 1057 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1058 int i; 1059 int ret; 1060 1061 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 1062 if (!gpriv) { 1063 dev_err(dev, "Could not allocate gadget priv\n"); 1064 return -ENOMEM; 1065 } 1066 1067 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); 1068 if (!uep) { 1069 dev_err(dev, "Could not allocate ep\n"); 1070 ret = -ENOMEM; 1071 goto usbhs_mod_gadget_probe_err_gpriv; 1072 } 1073 1074 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED); 1075 dev_info(dev, "%stransceiver found\n", 1076 gpriv->transceiver ? "" : "no "); 1077 1078 /* 1079 * CAUTION 1080 * 1081 * There is no guarantee that it is possible to access usb module here. 1082 * Don't accesses to it. 1083 * The accesse will be enable after "usbhsg_start" 1084 */ 1085 1086 /* 1087 * register itself 1088 */ 1089 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 1090 1091 /* init gpriv */ 1092 gpriv->mod.name = "gadget"; 1093 gpriv->mod.start = usbhsg_start; 1094 gpriv->mod.stop = usbhsg_stop; 1095 gpriv->uep = uep; 1096 gpriv->uep_size = pipe_size; 1097 usbhsg_status_init(gpriv); 1098 1099 /* 1100 * init gadget 1101 */ 1102 gpriv->gadget.dev.parent = dev; 1103 gpriv->gadget.name = "renesas_usbhs_udc"; 1104 gpriv->gadget.ops = &usbhsg_gadget_ops; 1105 gpriv->gadget.max_speed = USB_SPEED_HIGH; 1106 1107 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 1108 1109 /* 1110 * init usb_ep 1111 */ 1112 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 1113 uep->gpriv = gpriv; 1114 uep->pipe = NULL; 1115 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 1116 1117 uep->ep.name = uep->ep_name; 1118 uep->ep.ops = &usbhsg_ep_ops; 1119 INIT_LIST_HEAD(&uep->ep.ep_list); 1120 1121 /* init DCP */ 1122 if (usbhsg_is_dcp(uep)) { 1123 gpriv->gadget.ep0 = &uep->ep; 1124 usb_ep_set_maxpacket_limit(&uep->ep, 64); 1125 uep->ep.caps.type_control = true; 1126 } else { 1127 /* init normal pipe */ 1128 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC) 1129 uep->ep.caps.type_iso = true; 1130 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK) 1131 uep->ep.caps.type_bulk = true; 1132 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT) 1133 uep->ep.caps.type_int = true; 1134 usb_ep_set_maxpacket_limit(&uep->ep, 1135 pipe_configs[i].bufsize); 1136 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 1137 } 1138 uep->ep.caps.dir_in = true; 1139 uep->ep.caps.dir_out = true; 1140 } 1141 1142 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 1143 if (ret) 1144 goto err_add_udc; 1145 1146 1147 dev_info(dev, "gadget probed\n"); 1148 1149 return 0; 1150 1151 err_add_udc: 1152 kfree(gpriv->uep); 1153 1154 usbhs_mod_gadget_probe_err_gpriv: 1155 kfree(gpriv); 1156 1157 return ret; 1158 } 1159 1160 void usbhs_mod_gadget_remove(struct usbhs_priv *priv) 1161 { 1162 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1163 1164 usb_del_gadget_udc(&gpriv->gadget); 1165 1166 kfree(gpriv->uep); 1167 kfree(gpriv); 1168 } 1169