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 spinlock_t lock; /* protect the pipe */ 41 42 char ep_name[EP_NAME_SIZE]; 43 44 struct usbhsg_gpriv *gpriv; 45 }; 46 47 struct usbhsg_gpriv { 48 struct usb_gadget gadget; 49 struct usbhs_mod mod; 50 51 struct usbhsg_uep *uep; 52 int uep_size; 53 54 struct usb_gadget_driver *driver; 55 struct usb_phy *transceiver; 56 bool vbus_active; 57 58 u32 status; 59 #define USBHSG_STATUS_STARTED (1 << 0) 60 #define USBHSG_STATUS_REGISTERD (1 << 1) 61 #define USBHSG_STATUS_WEDGE (1 << 2) 62 #define USBHSG_STATUS_SELF_POWERED (1 << 3) 63 #define USBHSG_STATUS_SOFT_CONNECT (1 << 4) 64 }; 65 66 struct usbhsg_recip_handle { 67 char *name; 68 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 69 struct usb_ctrlrequest *ctrl); 70 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 71 struct usb_ctrlrequest *ctrl); 72 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 73 struct usb_ctrlrequest *ctrl); 74 }; 75 76 /* 77 * macro 78 */ 79 #define usbhsg_priv_to_gpriv(priv) \ 80 container_of( \ 81 usbhs_mod_get(priv, USBHS_GADGET), \ 82 struct usbhsg_gpriv, mod) 83 84 #define __usbhsg_for_each_uep(start, pos, g, i) \ 85 for ((i) = start; \ 86 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \ 87 (i)++) 88 89 #define usbhsg_for_each_uep(pos, gpriv, i) \ 90 __usbhsg_for_each_uep(1, pos, gpriv, i) 91 92 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \ 93 __usbhsg_for_each_uep(0, pos, gpriv, i) 94 95 #define usbhsg_gadget_to_gpriv(g)\ 96 container_of(g, struct usbhsg_gpriv, gadget) 97 98 #define usbhsg_req_to_ureq(r)\ 99 container_of(r, struct usbhsg_request, req) 100 101 #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep) 102 #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv) 103 #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv) 104 #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep) 105 #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i) 106 #define usbhsg_uep_to_gpriv(u) ((u)->gpriv) 107 #define usbhsg_uep_to_pipe(u) ((u)->pipe) 108 #define usbhsg_pipe_to_uep(p) ((p)->mod_private) 109 #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv)) 110 111 #define usbhsg_ureq_to_pkt(u) (&(u)->pkt) 112 #define usbhsg_pkt_to_ureq(i) \ 113 container_of(i, struct usbhsg_request, pkt) 114 115 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN) 116 117 /* status */ 118 #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0) 119 #define usbhsg_status_set(gp, b) (gp->status |= b) 120 #define usbhsg_status_clr(gp, b) (gp->status &= ~b) 121 #define usbhsg_status_has(gp, b) (gp->status & b) 122 123 /* 124 * queue push/pop 125 */ 126 static void __usbhsg_queue_pop(struct usbhsg_uep *uep, 127 struct usbhsg_request *ureq, 128 int status) 129 { 130 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 131 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 132 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 133 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 134 135 if (pipe) 136 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); 137 138 ureq->req.status = status; 139 spin_unlock(usbhs_priv_to_lock(priv)); 140 usb_gadget_giveback_request(&uep->ep, &ureq->req); 141 spin_lock(usbhs_priv_to_lock(priv)); 142 } 143 144 static void usbhsg_queue_pop(struct usbhsg_uep *uep, 145 struct usbhsg_request *ureq, 146 int status) 147 { 148 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 149 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 150 unsigned long flags; 151 152 usbhs_lock(priv, flags); 153 __usbhsg_queue_pop(uep, ureq, status); 154 usbhs_unlock(priv, flags); 155 } 156 157 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 158 { 159 struct usbhs_pipe *pipe = pkt->pipe; 160 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 161 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 162 unsigned long flags; 163 164 ureq->req.actual = pkt->actual; 165 166 usbhs_lock(priv, flags); 167 if (uep) 168 __usbhsg_queue_pop(uep, ureq, 0); 169 usbhs_unlock(priv, flags); 170 } 171 172 static void usbhsg_queue_push(struct usbhsg_uep *uep, 173 struct usbhsg_request *ureq) 174 { 175 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 176 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 177 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 178 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); 179 struct usb_request *req = &ureq->req; 180 181 req->actual = 0; 182 req->status = -EINPROGRESS; 183 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done, 184 req->buf, req->length, req->zero, -1); 185 usbhs_pkt_start(pipe); 186 187 dev_dbg(dev, "pipe %d : queue push (%d)\n", 188 usbhs_pipe_number(pipe), 189 req->length); 190 } 191 192 /* 193 * dma map/unmap 194 */ 195 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt, 196 int map) 197 { 198 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 199 struct usb_request *req = &ureq->req; 200 struct usbhs_pipe *pipe = pkt->pipe; 201 enum dma_data_direction dir; 202 int ret = 0; 203 204 dir = usbhs_pipe_is_dir_host(pipe); 205 206 if (map) { 207 /* it can not use scatter/gather */ 208 WARN_ON(req->num_sgs); 209 210 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir); 211 if (ret < 0) 212 return ret; 213 214 pkt->dma = req->dma; 215 } else { 216 usb_gadget_unmap_request_by_dev(dma_dev, req, dir); 217 } 218 219 return ret; 220 } 221 222 /* 223 * USB_TYPE_STANDARD / clear feature functions 224 */ 225 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, 226 struct usbhsg_uep *uep, 227 struct usb_ctrlrequest *ctrl) 228 { 229 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 230 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 231 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 232 233 usbhs_dcp_control_transfer_done(pipe); 234 235 return 0; 236 } 237 238 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, 239 struct usbhsg_uep *uep, 240 struct usb_ctrlrequest *ctrl) 241 { 242 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 243 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 244 245 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { 246 usbhs_pipe_disable(pipe); 247 usbhs_pipe_sequence_data0(pipe); 248 usbhs_pipe_enable(pipe); 249 } 250 251 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 252 253 usbhs_pkt_start(pipe); 254 255 return 0; 256 } 257 258 static struct usbhsg_recip_handle req_clear_feature = { 259 .name = "clear feature", 260 .device = usbhsg_recip_handler_std_control_done, 261 .interface = usbhsg_recip_handler_std_control_done, 262 .endpoint = usbhsg_recip_handler_std_clear_endpoint, 263 }; 264 265 /* 266 * USB_TYPE_STANDARD / set feature functions 267 */ 268 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv, 269 struct usbhsg_uep *uep, 270 struct usb_ctrlrequest *ctrl) 271 { 272 switch (le16_to_cpu(ctrl->wValue)) { 273 case USB_DEVICE_TEST_MODE: 274 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 275 udelay(100); 276 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8)); 277 break; 278 default: 279 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 280 break; 281 } 282 283 return 0; 284 } 285 286 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv, 287 struct usbhsg_uep *uep, 288 struct usb_ctrlrequest *ctrl) 289 { 290 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 291 292 usbhs_pipe_stall(pipe); 293 294 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 295 296 return 0; 297 } 298 299 static struct usbhsg_recip_handle req_set_feature = { 300 .name = "set feature", 301 .device = usbhsg_recip_handler_std_set_device, 302 .interface = usbhsg_recip_handler_std_control_done, 303 .endpoint = usbhsg_recip_handler_std_set_endpoint, 304 }; 305 306 /* 307 * USB_TYPE_STANDARD / get status functions 308 */ 309 static void __usbhsg_recip_send_complete(struct usb_ep *ep, 310 struct usb_request *req) 311 { 312 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 313 314 /* free allocated recip-buffer/usb_request */ 315 kfree(ureq->pkt.buf); 316 usb_ep_free_request(ep, req); 317 } 318 319 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv, 320 unsigned short status) 321 { 322 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 323 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 324 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 325 struct usb_request *req; 326 unsigned short *buf; 327 328 /* alloc new usb_request for recip */ 329 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC); 330 if (!req) { 331 dev_err(dev, "recip request allocation fail\n"); 332 return; 333 } 334 335 /* alloc recip data buffer */ 336 buf = kmalloc(sizeof(*buf), GFP_ATOMIC); 337 if (!buf) { 338 usb_ep_free_request(&dcp->ep, req); 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; 641 unsigned long flags; 642 643 spin_lock_irqsave(&uep->lock, flags); 644 pipe = usbhsg_uep_to_pipe(uep); 645 if (!pipe) 646 goto out; 647 648 usbhsg_pipe_disable(uep); 649 usbhs_pipe_free(pipe); 650 651 uep->pipe->mod_private = NULL; 652 uep->pipe = NULL; 653 654 out: 655 spin_unlock_irqrestore(&uep->lock, flags); 656 657 return 0; 658 } 659 660 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 661 gfp_t gfp_flags) 662 { 663 struct usbhsg_request *ureq; 664 665 ureq = kzalloc(sizeof *ureq, gfp_flags); 666 if (!ureq) 667 return NULL; 668 669 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 670 671 return &ureq->req; 672 } 673 674 static void usbhsg_ep_free_request(struct usb_ep *ep, 675 struct usb_request *req) 676 { 677 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 678 679 WARN_ON(!list_empty(&ureq->pkt.node)); 680 kfree(ureq); 681 } 682 683 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 684 gfp_t gfp_flags) 685 { 686 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 687 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 688 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 689 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 690 691 /* param check */ 692 if (usbhsg_is_not_connected(gpriv) || 693 unlikely(!gpriv->driver) || 694 unlikely(!pipe)) 695 return -ESHUTDOWN; 696 697 usbhsg_queue_push(uep, ureq); 698 699 return 0; 700 } 701 702 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 703 { 704 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 705 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 706 struct usbhs_pipe *pipe; 707 unsigned long flags; 708 709 spin_lock_irqsave(&uep->lock, flags); 710 pipe = usbhsg_uep_to_pipe(uep); 711 if (pipe) 712 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 713 714 /* 715 * To dequeue a request, this driver should call the usbhsg_queue_pop() 716 * even if the pipe is NULL. 717 */ 718 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 719 spin_unlock_irqrestore(&uep->lock, flags); 720 721 return 0; 722 } 723 724 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 725 { 726 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 727 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 728 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 729 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 730 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 731 unsigned long flags; 732 733 usbhsg_pipe_disable(uep); 734 735 dev_dbg(dev, "set halt %d (pipe %d)\n", 736 halt, usbhs_pipe_number(pipe)); 737 738 /******************** spin lock ********************/ 739 usbhs_lock(priv, flags); 740 741 if (halt) 742 usbhs_pipe_stall(pipe); 743 else 744 usbhs_pipe_disable(pipe); 745 746 if (halt && wedge) 747 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 748 else 749 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 750 751 usbhs_unlock(priv, flags); 752 /******************** spin unlock ******************/ 753 754 return 0; 755 } 756 757 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 758 { 759 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 760 } 761 762 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 763 { 764 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 765 } 766 767 static const struct usb_ep_ops usbhsg_ep_ops = { 768 .enable = usbhsg_ep_enable, 769 .disable = usbhsg_ep_disable, 770 771 .alloc_request = usbhsg_ep_alloc_request, 772 .free_request = usbhsg_ep_free_request, 773 774 .queue = usbhsg_ep_queue, 775 .dequeue = usbhsg_ep_dequeue, 776 777 .set_halt = usbhsg_ep_set_halt, 778 .set_wedge = usbhsg_ep_set_wedge, 779 }; 780 781 /* 782 * pullup control 783 */ 784 static int usbhsg_can_pullup(struct usbhs_priv *priv) 785 { 786 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 787 788 return gpriv->driver && 789 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT); 790 } 791 792 static void usbhsg_update_pullup(struct usbhs_priv *priv) 793 { 794 if (usbhsg_can_pullup(priv)) 795 usbhs_sys_function_pullup(priv, 1); 796 else 797 usbhs_sys_function_pullup(priv, 0); 798 } 799 800 /* 801 * usb module start/end 802 */ 803 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 804 { 805 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 806 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 807 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 808 struct device *dev = usbhs_priv_to_dev(priv); 809 unsigned long flags; 810 int ret = 0; 811 812 /******************** spin lock ********************/ 813 usbhs_lock(priv, flags); 814 815 usbhsg_status_set(gpriv, status); 816 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 817 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 818 ret = -1; /* not ready */ 819 820 usbhs_unlock(priv, flags); 821 /******************** spin unlock ********************/ 822 823 if (ret < 0) 824 return 0; /* not ready is not error */ 825 826 /* 827 * enable interrupt and systems if ready 828 */ 829 dev_dbg(dev, "start gadget\n"); 830 831 /* 832 * pipe initialize and enable DCP 833 */ 834 usbhs_fifo_init(priv); 835 usbhs_pipe_init(priv, 836 usbhsg_dma_map_ctrl); 837 838 /* dcp init instead of usbhsg_ep_enable() */ 839 dcp->pipe = usbhs_dcp_malloc(priv); 840 dcp->pipe->mod_private = dcp; 841 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 842 843 /* 844 * system config enble 845 * - HI speed 846 * - function 847 * - usb module 848 */ 849 usbhs_sys_function_ctrl(priv, 1); 850 usbhsg_update_pullup(priv); 851 852 /* 853 * enable irq callback 854 */ 855 mod->irq_dev_state = usbhsg_irq_dev_state; 856 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 857 usbhs_irq_callback_update(priv, mod); 858 859 return 0; 860 } 861 862 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 863 { 864 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 865 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 866 struct usbhsg_uep *uep; 867 struct device *dev = usbhs_priv_to_dev(priv); 868 unsigned long flags; 869 int ret = 0, i; 870 871 /******************** spin lock ********************/ 872 usbhs_lock(priv, flags); 873 874 usbhsg_status_clr(gpriv, status); 875 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 876 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 877 ret = -1; /* already done */ 878 879 usbhs_unlock(priv, flags); 880 /******************** spin unlock ********************/ 881 882 if (ret < 0) 883 return 0; /* already done is not error */ 884 885 /* 886 * disable interrupt and systems if 1st try 887 */ 888 usbhs_fifo_quit(priv); 889 890 /* disable all irq */ 891 mod->irq_dev_state = NULL; 892 mod->irq_ctrl_stage = NULL; 893 usbhs_irq_callback_update(priv, mod); 894 895 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 896 897 /* disable sys */ 898 usbhs_sys_set_test_mode(priv, 0); 899 usbhs_sys_function_ctrl(priv, 0); 900 901 /* disable all eps */ 902 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) 903 usbhsg_ep_disable(&uep->ep); 904 905 dev_dbg(dev, "stop gadget\n"); 906 907 return 0; 908 } 909 910 /* 911 * VBUS provided by the PHY 912 */ 913 static int usbhsm_phy_get_vbus(struct platform_device *pdev) 914 { 915 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 916 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 917 918 return gpriv->vbus_active; 919 } 920 921 static void usbhs_mod_phy_mode(struct usbhs_priv *priv) 922 { 923 struct usbhs_mod_info *info = &priv->mod_info; 924 925 info->irq_vbus = NULL; 926 priv->pfunc.get_vbus = usbhsm_phy_get_vbus; 927 928 usbhs_irq_callback_update(priv, NULL); 929 } 930 931 /* 932 * 933 * linux usb function 934 * 935 */ 936 static int usbhsg_gadget_start(struct usb_gadget *gadget, 937 struct usb_gadget_driver *driver) 938 { 939 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 940 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 941 struct device *dev = usbhs_priv_to_dev(priv); 942 int ret; 943 944 if (!driver || 945 !driver->setup || 946 driver->max_speed < USB_SPEED_FULL) 947 return -EINVAL; 948 949 /* connect to bus through transceiver */ 950 if (!IS_ERR_OR_NULL(gpriv->transceiver)) { 951 ret = otg_set_peripheral(gpriv->transceiver->otg, 952 &gpriv->gadget); 953 if (ret) { 954 dev_err(dev, "%s: can't bind to transceiver\n", 955 gpriv->gadget.name); 956 return ret; 957 } 958 959 /* get vbus using phy versions */ 960 usbhs_mod_phy_mode(priv); 961 } 962 963 /* first hook up the driver ... */ 964 gpriv->driver = driver; 965 966 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 967 } 968 969 static int usbhsg_gadget_stop(struct usb_gadget *gadget) 970 { 971 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 972 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 973 974 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 975 976 if (!IS_ERR_OR_NULL(gpriv->transceiver)) 977 otg_set_peripheral(gpriv->transceiver->otg, NULL); 978 979 gpriv->driver = NULL; 980 981 return 0; 982 } 983 984 /* 985 * usb gadget ops 986 */ 987 static int usbhsg_get_frame(struct usb_gadget *gadget) 988 { 989 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 990 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 991 992 return usbhs_frame_get_num(priv); 993 } 994 995 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on) 996 { 997 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 998 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 999 unsigned long flags; 1000 1001 usbhs_lock(priv, flags); 1002 if (is_on) 1003 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT); 1004 else 1005 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT); 1006 usbhsg_update_pullup(priv); 1007 usbhs_unlock(priv, flags); 1008 1009 return 0; 1010 } 1011 1012 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self) 1013 { 1014 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1015 1016 if (is_self) 1017 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED); 1018 else 1019 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED); 1020 1021 gadget->is_selfpowered = (is_self != 0); 1022 1023 return 0; 1024 } 1025 1026 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active) 1027 { 1028 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1029 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1030 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 1031 1032 gpriv->vbus_active = !!is_active; 1033 1034 renesas_usbhs_call_notify_hotplug(pdev); 1035 1036 return 0; 1037 } 1038 1039 static const struct usb_gadget_ops usbhsg_gadget_ops = { 1040 .get_frame = usbhsg_get_frame, 1041 .set_selfpowered = usbhsg_set_selfpowered, 1042 .udc_start = usbhsg_gadget_start, 1043 .udc_stop = usbhsg_gadget_stop, 1044 .pullup = usbhsg_pullup, 1045 .vbus_session = usbhsg_vbus_session, 1046 }; 1047 1048 static int usbhsg_start(struct usbhs_priv *priv) 1049 { 1050 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 1051 } 1052 1053 static int usbhsg_stop(struct usbhs_priv *priv) 1054 { 1055 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1056 1057 /* cable disconnect */ 1058 if (gpriv->driver && 1059 gpriv->driver->disconnect) 1060 gpriv->driver->disconnect(&gpriv->gadget); 1061 1062 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 1063 } 1064 1065 int usbhs_mod_gadget_probe(struct usbhs_priv *priv) 1066 { 1067 struct usbhsg_gpriv *gpriv; 1068 struct usbhsg_uep *uep; 1069 struct device *dev = usbhs_priv_to_dev(priv); 1070 struct renesas_usbhs_driver_pipe_config *pipe_configs = 1071 usbhs_get_dparam(priv, pipe_configs); 1072 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1073 int i; 1074 int ret; 1075 1076 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 1077 if (!gpriv) 1078 return -ENOMEM; 1079 1080 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); 1081 if (!uep) { 1082 ret = -ENOMEM; 1083 goto usbhs_mod_gadget_probe_err_gpriv; 1084 } 1085 1086 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED); 1087 dev_info(dev, "%stransceiver found\n", 1088 !IS_ERR(gpriv->transceiver) ? "" : "no "); 1089 1090 /* 1091 * CAUTION 1092 * 1093 * There is no guarantee that it is possible to access usb module here. 1094 * Don't accesses to it. 1095 * The accesse will be enable after "usbhsg_start" 1096 */ 1097 1098 /* 1099 * register itself 1100 */ 1101 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 1102 1103 /* init gpriv */ 1104 gpriv->mod.name = "gadget"; 1105 gpriv->mod.start = usbhsg_start; 1106 gpriv->mod.stop = usbhsg_stop; 1107 gpriv->uep = uep; 1108 gpriv->uep_size = pipe_size; 1109 usbhsg_status_init(gpriv); 1110 1111 /* 1112 * init gadget 1113 */ 1114 gpriv->gadget.dev.parent = dev; 1115 gpriv->gadget.name = "renesas_usbhs_udc"; 1116 gpriv->gadget.ops = &usbhsg_gadget_ops; 1117 gpriv->gadget.max_speed = USB_SPEED_HIGH; 1118 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv, 1119 has_usb_dmac); 1120 1121 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 1122 1123 /* 1124 * init usb_ep 1125 */ 1126 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 1127 uep->gpriv = gpriv; 1128 uep->pipe = NULL; 1129 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 1130 1131 uep->ep.name = uep->ep_name; 1132 uep->ep.ops = &usbhsg_ep_ops; 1133 INIT_LIST_HEAD(&uep->ep.ep_list); 1134 spin_lock_init(&uep->lock); 1135 1136 /* init DCP */ 1137 if (usbhsg_is_dcp(uep)) { 1138 gpriv->gadget.ep0 = &uep->ep; 1139 usb_ep_set_maxpacket_limit(&uep->ep, 64); 1140 uep->ep.caps.type_control = true; 1141 } else { 1142 /* init normal pipe */ 1143 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC) 1144 uep->ep.caps.type_iso = true; 1145 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK) 1146 uep->ep.caps.type_bulk = true; 1147 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT) 1148 uep->ep.caps.type_int = true; 1149 usb_ep_set_maxpacket_limit(&uep->ep, 1150 pipe_configs[i].bufsize); 1151 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 1152 } 1153 uep->ep.caps.dir_in = true; 1154 uep->ep.caps.dir_out = true; 1155 } 1156 1157 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 1158 if (ret) 1159 goto err_add_udc; 1160 1161 1162 dev_info(dev, "gadget probed\n"); 1163 1164 return 0; 1165 1166 err_add_udc: 1167 kfree(gpriv->uep); 1168 1169 usbhs_mod_gadget_probe_err_gpriv: 1170 kfree(gpriv); 1171 1172 return ret; 1173 } 1174 1175 void usbhs_mod_gadget_remove(struct usbhs_priv *priv) 1176 { 1177 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1178 1179 usb_del_gadget_udc(&gpriv->gadget); 1180 1181 kfree(gpriv->uep); 1182 kfree(gpriv); 1183 } 1184