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 usbhs_xxxsts_clear(priv, BRDYSTS, 625 usbhs_pipe_number(pipe)); 626 } 627 628 ret = 0; 629 } 630 631 usbhsg_ep_enable_end: 632 usbhs_unlock(priv, flags); 633 634 return ret; 635 } 636 637 static int usbhsg_ep_disable(struct usb_ep *ep) 638 { 639 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 640 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 641 642 if (!pipe) 643 return -EINVAL; 644 645 usbhsg_pipe_disable(uep); 646 usbhs_pipe_free(pipe); 647 648 uep->pipe->mod_private = NULL; 649 uep->pipe = NULL; 650 651 return 0; 652 } 653 654 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 655 gfp_t gfp_flags) 656 { 657 struct usbhsg_request *ureq; 658 659 ureq = kzalloc(sizeof *ureq, gfp_flags); 660 if (!ureq) 661 return NULL; 662 663 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 664 665 return &ureq->req; 666 } 667 668 static void usbhsg_ep_free_request(struct usb_ep *ep, 669 struct usb_request *req) 670 { 671 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 672 673 WARN_ON(!list_empty(&ureq->pkt.node)); 674 kfree(ureq); 675 } 676 677 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 678 gfp_t gfp_flags) 679 { 680 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 681 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 682 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 683 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 684 685 /* param check */ 686 if (usbhsg_is_not_connected(gpriv) || 687 unlikely(!gpriv->driver) || 688 unlikely(!pipe)) 689 return -ESHUTDOWN; 690 691 usbhsg_queue_push(uep, ureq); 692 693 return 0; 694 } 695 696 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 697 { 698 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 699 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 700 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 701 702 if (pipe) 703 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 704 705 /* 706 * To dequeue a request, this driver should call the usbhsg_queue_pop() 707 * even if the pipe is NULL. 708 */ 709 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 710 711 return 0; 712 } 713 714 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 715 { 716 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 717 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 718 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 719 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 720 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 721 unsigned long flags; 722 723 usbhsg_pipe_disable(uep); 724 725 dev_dbg(dev, "set halt %d (pipe %d)\n", 726 halt, usbhs_pipe_number(pipe)); 727 728 /******************** spin lock ********************/ 729 usbhs_lock(priv, flags); 730 731 if (halt) 732 usbhs_pipe_stall(pipe); 733 else 734 usbhs_pipe_disable(pipe); 735 736 if (halt && wedge) 737 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 738 else 739 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 740 741 usbhs_unlock(priv, flags); 742 /******************** spin unlock ******************/ 743 744 return 0; 745 } 746 747 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 748 { 749 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 750 } 751 752 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 753 { 754 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 755 } 756 757 static struct usb_ep_ops usbhsg_ep_ops = { 758 .enable = usbhsg_ep_enable, 759 .disable = usbhsg_ep_disable, 760 761 .alloc_request = usbhsg_ep_alloc_request, 762 .free_request = usbhsg_ep_free_request, 763 764 .queue = usbhsg_ep_queue, 765 .dequeue = usbhsg_ep_dequeue, 766 767 .set_halt = usbhsg_ep_set_halt, 768 .set_wedge = usbhsg_ep_set_wedge, 769 }; 770 771 /* 772 * pullup control 773 */ 774 static int usbhsg_can_pullup(struct usbhs_priv *priv) 775 { 776 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 777 778 return gpriv->driver && 779 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT); 780 } 781 782 static void usbhsg_update_pullup(struct usbhs_priv *priv) 783 { 784 if (usbhsg_can_pullup(priv)) 785 usbhs_sys_function_pullup(priv, 1); 786 else 787 usbhs_sys_function_pullup(priv, 0); 788 } 789 790 /* 791 * usb module start/end 792 */ 793 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 794 { 795 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 796 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 797 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 798 struct device *dev = usbhs_priv_to_dev(priv); 799 unsigned long flags; 800 int ret = 0; 801 802 /******************** spin lock ********************/ 803 usbhs_lock(priv, flags); 804 805 usbhsg_status_set(gpriv, status); 806 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 807 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 808 ret = -1; /* not ready */ 809 810 usbhs_unlock(priv, flags); 811 /******************** spin unlock ********************/ 812 813 if (ret < 0) 814 return 0; /* not ready is not error */ 815 816 /* 817 * enable interrupt and systems if ready 818 */ 819 dev_dbg(dev, "start gadget\n"); 820 821 /* 822 * pipe initialize and enable DCP 823 */ 824 usbhs_fifo_init(priv); 825 usbhs_pipe_init(priv, 826 usbhsg_dma_map_ctrl); 827 828 /* dcp init instead of usbhsg_ep_enable() */ 829 dcp->pipe = usbhs_dcp_malloc(priv); 830 dcp->pipe->mod_private = dcp; 831 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 832 833 /* 834 * system config enble 835 * - HI speed 836 * - function 837 * - usb module 838 */ 839 usbhs_sys_function_ctrl(priv, 1); 840 usbhsg_update_pullup(priv); 841 842 /* 843 * enable irq callback 844 */ 845 mod->irq_dev_state = usbhsg_irq_dev_state; 846 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 847 usbhs_irq_callback_update(priv, mod); 848 849 return 0; 850 } 851 852 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 853 { 854 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 855 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 856 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 857 struct device *dev = usbhs_priv_to_dev(priv); 858 unsigned long flags; 859 int ret = 0; 860 861 /******************** spin lock ********************/ 862 usbhs_lock(priv, flags); 863 864 usbhsg_status_clr(gpriv, status); 865 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 866 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 867 ret = -1; /* already done */ 868 869 usbhs_unlock(priv, flags); 870 /******************** spin unlock ********************/ 871 872 if (ret < 0) 873 return 0; /* already done is not error */ 874 875 /* 876 * disable interrupt and systems if 1st try 877 */ 878 usbhs_fifo_quit(priv); 879 880 /* disable all irq */ 881 mod->irq_dev_state = NULL; 882 mod->irq_ctrl_stage = NULL; 883 usbhs_irq_callback_update(priv, mod); 884 885 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 886 887 /* disable sys */ 888 usbhs_sys_set_test_mode(priv, 0); 889 usbhs_sys_function_ctrl(priv, 0); 890 891 usbhsg_ep_disable(&dcp->ep); 892 893 dev_dbg(dev, "stop gadget\n"); 894 895 return 0; 896 } 897 898 /* 899 * VBUS provided by the PHY 900 */ 901 static int usbhsm_phy_get_vbus(struct platform_device *pdev) 902 { 903 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 904 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 905 906 return gpriv->vbus_active; 907 } 908 909 static void usbhs_mod_phy_mode(struct usbhs_priv *priv) 910 { 911 struct usbhs_mod_info *info = &priv->mod_info; 912 913 info->irq_vbus = NULL; 914 priv->pfunc.get_vbus = usbhsm_phy_get_vbus; 915 916 usbhs_irq_callback_update(priv, NULL); 917 } 918 919 /* 920 * 921 * linux usb function 922 * 923 */ 924 static int usbhsg_gadget_start(struct usb_gadget *gadget, 925 struct usb_gadget_driver *driver) 926 { 927 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 928 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 929 struct device *dev = usbhs_priv_to_dev(priv); 930 int ret; 931 932 if (!driver || 933 !driver->setup || 934 driver->max_speed < USB_SPEED_FULL) 935 return -EINVAL; 936 937 /* connect to bus through transceiver */ 938 if (!IS_ERR_OR_NULL(gpriv->transceiver)) { 939 ret = otg_set_peripheral(gpriv->transceiver->otg, 940 &gpriv->gadget); 941 if (ret) { 942 dev_err(dev, "%s: can't bind to transceiver\n", 943 gpriv->gadget.name); 944 return ret; 945 } 946 947 /* get vbus using phy versions */ 948 usbhs_mod_phy_mode(priv); 949 } 950 951 /* first hook up the driver ... */ 952 gpriv->driver = driver; 953 954 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 955 } 956 957 static int usbhsg_gadget_stop(struct usb_gadget *gadget) 958 { 959 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 960 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 961 962 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 963 964 if (!IS_ERR_OR_NULL(gpriv->transceiver)) 965 otg_set_peripheral(gpriv->transceiver->otg, NULL); 966 967 gpriv->driver = NULL; 968 969 return 0; 970 } 971 972 /* 973 * usb gadget ops 974 */ 975 static int usbhsg_get_frame(struct usb_gadget *gadget) 976 { 977 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 978 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 979 980 return usbhs_frame_get_num(priv); 981 } 982 983 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on) 984 { 985 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 986 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 987 unsigned long flags; 988 989 usbhs_lock(priv, flags); 990 if (is_on) 991 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT); 992 else 993 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT); 994 usbhsg_update_pullup(priv); 995 usbhs_unlock(priv, flags); 996 997 return 0; 998 } 999 1000 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self) 1001 { 1002 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1003 1004 if (is_self) 1005 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED); 1006 else 1007 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED); 1008 1009 gadget->is_selfpowered = (is_self != 0); 1010 1011 return 0; 1012 } 1013 1014 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active) 1015 { 1016 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1017 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1018 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 1019 1020 gpriv->vbus_active = !!is_active; 1021 1022 renesas_usbhs_call_notify_hotplug(pdev); 1023 1024 return 0; 1025 } 1026 1027 static const struct usb_gadget_ops usbhsg_gadget_ops = { 1028 .get_frame = usbhsg_get_frame, 1029 .set_selfpowered = usbhsg_set_selfpowered, 1030 .udc_start = usbhsg_gadget_start, 1031 .udc_stop = usbhsg_gadget_stop, 1032 .pullup = usbhsg_pullup, 1033 .vbus_session = usbhsg_vbus_session, 1034 }; 1035 1036 static int usbhsg_start(struct usbhs_priv *priv) 1037 { 1038 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 1039 } 1040 1041 static int usbhsg_stop(struct usbhs_priv *priv) 1042 { 1043 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1044 1045 /* cable disconnect */ 1046 if (gpriv->driver && 1047 gpriv->driver->disconnect) 1048 gpriv->driver->disconnect(&gpriv->gadget); 1049 1050 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 1051 } 1052 1053 int usbhs_mod_gadget_probe(struct usbhs_priv *priv) 1054 { 1055 struct usbhsg_gpriv *gpriv; 1056 struct usbhsg_uep *uep; 1057 struct device *dev = usbhs_priv_to_dev(priv); 1058 struct renesas_usbhs_driver_pipe_config *pipe_configs = 1059 usbhs_get_dparam(priv, pipe_configs); 1060 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1061 int i; 1062 int ret; 1063 1064 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 1065 if (!gpriv) { 1066 dev_err(dev, "Could not allocate gadget priv\n"); 1067 return -ENOMEM; 1068 } 1069 1070 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); 1071 if (!uep) { 1072 dev_err(dev, "Could not allocate ep\n"); 1073 ret = -ENOMEM; 1074 goto usbhs_mod_gadget_probe_err_gpriv; 1075 } 1076 1077 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED); 1078 dev_info(dev, "%stransceiver found\n", 1079 !IS_ERR(gpriv->transceiver) ? "" : "no "); 1080 1081 /* 1082 * CAUTION 1083 * 1084 * There is no guarantee that it is possible to access usb module here. 1085 * Don't accesses to it. 1086 * The accesse will be enable after "usbhsg_start" 1087 */ 1088 1089 /* 1090 * register itself 1091 */ 1092 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 1093 1094 /* init gpriv */ 1095 gpriv->mod.name = "gadget"; 1096 gpriv->mod.start = usbhsg_start; 1097 gpriv->mod.stop = usbhsg_stop; 1098 gpriv->uep = uep; 1099 gpriv->uep_size = pipe_size; 1100 usbhsg_status_init(gpriv); 1101 1102 /* 1103 * init gadget 1104 */ 1105 gpriv->gadget.dev.parent = dev; 1106 gpriv->gadget.name = "renesas_usbhs_udc"; 1107 gpriv->gadget.ops = &usbhsg_gadget_ops; 1108 gpriv->gadget.max_speed = USB_SPEED_HIGH; 1109 1110 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 1111 1112 /* 1113 * init usb_ep 1114 */ 1115 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 1116 uep->gpriv = gpriv; 1117 uep->pipe = NULL; 1118 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 1119 1120 uep->ep.name = uep->ep_name; 1121 uep->ep.ops = &usbhsg_ep_ops; 1122 INIT_LIST_HEAD(&uep->ep.ep_list); 1123 1124 /* init DCP */ 1125 if (usbhsg_is_dcp(uep)) { 1126 gpriv->gadget.ep0 = &uep->ep; 1127 usb_ep_set_maxpacket_limit(&uep->ep, 64); 1128 uep->ep.caps.type_control = true; 1129 } else { 1130 /* init normal pipe */ 1131 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC) 1132 uep->ep.caps.type_iso = true; 1133 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK) 1134 uep->ep.caps.type_bulk = true; 1135 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT) 1136 uep->ep.caps.type_int = true; 1137 usb_ep_set_maxpacket_limit(&uep->ep, 1138 pipe_configs[i].bufsize); 1139 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 1140 } 1141 uep->ep.caps.dir_in = true; 1142 uep->ep.caps.dir_out = true; 1143 } 1144 1145 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 1146 if (ret) 1147 goto err_add_udc; 1148 1149 1150 dev_info(dev, "gadget probed\n"); 1151 1152 return 0; 1153 1154 err_add_udc: 1155 kfree(gpriv->uep); 1156 1157 usbhs_mod_gadget_probe_err_gpriv: 1158 kfree(gpriv); 1159 1160 return ret; 1161 } 1162 1163 void usbhs_mod_gadget_remove(struct usbhs_priv *priv) 1164 { 1165 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1166 1167 usb_del_gadget_udc(&gpriv->gadget); 1168 1169 kfree(gpriv->uep); 1170 kfree(gpriv); 1171 } 1172