1 // SPDX-License-Identifier: GPL-1.0+ 2 /* 3 * Renesas USB driver 4 * 5 * Copyright (C) 2011 Renesas Solutions Corp. 6 * Copyright (C) 2019 Renesas Electronics Corporation 7 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 8 */ 9 #include <linux/delay.h> 10 #include <linux/dma-mapping.h> 11 #include <linux/io.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include <linux/usb/ch9.h> 15 #include <linux/usb/gadget.h> 16 #include <linux/usb/otg.h> 17 #include "common.h" 18 19 /* 20 * struct 21 */ 22 struct usbhsg_request { 23 struct usb_request req; 24 struct usbhs_pkt pkt; 25 }; 26 27 #define EP_NAME_SIZE 8 28 struct usbhsg_gpriv; 29 struct usbhsg_uep { 30 struct usb_ep ep; 31 struct usbhs_pipe *pipe; 32 spinlock_t lock; /* protect the pipe */ 33 34 char ep_name[EP_NAME_SIZE]; 35 36 struct usbhsg_gpriv *gpriv; 37 }; 38 39 struct usbhsg_gpriv { 40 struct usb_gadget gadget; 41 struct usbhs_mod mod; 42 43 struct usbhsg_uep *uep; 44 int uep_size; 45 46 struct usb_gadget_driver *driver; 47 struct usb_phy *transceiver; 48 bool vbus_active; 49 50 u32 status; 51 #define USBHSG_STATUS_STARTED (1 << 0) 52 #define USBHSG_STATUS_REGISTERD (1 << 1) 53 #define USBHSG_STATUS_WEDGE (1 << 2) 54 #define USBHSG_STATUS_SELF_POWERED (1 << 3) 55 #define USBHSG_STATUS_SOFT_CONNECT (1 << 4) 56 }; 57 58 struct usbhsg_recip_handle { 59 char *name; 60 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 61 struct usb_ctrlrequest *ctrl); 62 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 63 struct usb_ctrlrequest *ctrl); 64 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 65 struct usb_ctrlrequest *ctrl); 66 }; 67 68 /* 69 * macro 70 */ 71 #define usbhsg_priv_to_gpriv(priv) \ 72 container_of( \ 73 usbhs_mod_get(priv, USBHS_GADGET), \ 74 struct usbhsg_gpriv, mod) 75 76 #define __usbhsg_for_each_uep(start, pos, g, i) \ 77 for ((i) = start; \ 78 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \ 79 (i)++) 80 81 #define usbhsg_for_each_uep(pos, gpriv, i) \ 82 __usbhsg_for_each_uep(1, pos, gpriv, i) 83 84 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \ 85 __usbhsg_for_each_uep(0, pos, gpriv, i) 86 87 #define usbhsg_gadget_to_gpriv(g)\ 88 container_of(g, struct usbhsg_gpriv, gadget) 89 90 #define usbhsg_req_to_ureq(r)\ 91 container_of(r, struct usbhsg_request, req) 92 93 #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep) 94 #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv) 95 #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv) 96 #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep) 97 #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i) 98 #define usbhsg_uep_to_gpriv(u) ((u)->gpriv) 99 #define usbhsg_uep_to_pipe(u) ((u)->pipe) 100 #define usbhsg_pipe_to_uep(p) ((p)->mod_private) 101 #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv)) 102 103 #define usbhsg_ureq_to_pkt(u) (&(u)->pkt) 104 #define usbhsg_pkt_to_ureq(i) \ 105 container_of(i, struct usbhsg_request, pkt) 106 107 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN) 108 109 /* status */ 110 #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0) 111 #define usbhsg_status_set(gp, b) (gp->status |= b) 112 #define usbhsg_status_clr(gp, b) (gp->status &= ~b) 113 #define usbhsg_status_has(gp, b) (gp->status & b) 114 115 /* 116 * queue push/pop 117 */ 118 static void __usbhsg_queue_pop(struct usbhsg_uep *uep, 119 struct usbhsg_request *ureq, 120 int status) 121 { 122 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 123 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 124 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 125 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 126 127 if (pipe) 128 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); 129 130 ureq->req.status = status; 131 spin_unlock(usbhs_priv_to_lock(priv)); 132 usb_gadget_giveback_request(&uep->ep, &ureq->req); 133 spin_lock(usbhs_priv_to_lock(priv)); 134 } 135 136 static void usbhsg_queue_pop(struct usbhsg_uep *uep, 137 struct usbhsg_request *ureq, 138 int status) 139 { 140 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 141 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 142 unsigned long flags; 143 144 usbhs_lock(priv, flags); 145 __usbhsg_queue_pop(uep, ureq, status); 146 usbhs_unlock(priv, flags); 147 } 148 149 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 150 { 151 struct usbhs_pipe *pipe = pkt->pipe; 152 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); 153 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 154 unsigned long flags; 155 156 ureq->req.actual = pkt->actual; 157 158 usbhs_lock(priv, flags); 159 if (uep) 160 __usbhsg_queue_pop(uep, ureq, 0); 161 usbhs_unlock(priv, flags); 162 } 163 164 static void usbhsg_queue_push(struct usbhsg_uep *uep, 165 struct usbhsg_request *ureq) 166 { 167 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 168 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 169 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 170 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); 171 struct usb_request *req = &ureq->req; 172 173 req->actual = 0; 174 req->status = -EINPROGRESS; 175 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done, 176 req->buf, req->length, req->zero, -1); 177 usbhs_pkt_start(pipe); 178 179 dev_dbg(dev, "pipe %d : queue push (%d)\n", 180 usbhs_pipe_number(pipe), 181 req->length); 182 } 183 184 /* 185 * dma map/unmap 186 */ 187 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt, 188 int map) 189 { 190 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); 191 struct usb_request *req = &ureq->req; 192 struct usbhs_pipe *pipe = pkt->pipe; 193 enum dma_data_direction dir; 194 int ret = 0; 195 196 dir = usbhs_pipe_is_dir_host(pipe); 197 198 if (map) { 199 /* it can not use scatter/gather */ 200 WARN_ON(req->num_sgs); 201 202 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir); 203 if (ret < 0) 204 return ret; 205 206 pkt->dma = req->dma; 207 } else { 208 usb_gadget_unmap_request_by_dev(dma_dev, req, dir); 209 } 210 211 return ret; 212 } 213 214 /* 215 * USB_TYPE_STANDARD / clear feature functions 216 */ 217 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, 218 struct usbhsg_uep *uep, 219 struct usb_ctrlrequest *ctrl) 220 { 221 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 222 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 223 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 224 225 usbhs_dcp_control_transfer_done(pipe); 226 227 return 0; 228 } 229 230 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, 231 struct usbhsg_uep *uep, 232 struct usb_ctrlrequest *ctrl) 233 { 234 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 235 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 236 237 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { 238 usbhs_pipe_disable(pipe); 239 usbhs_pipe_sequence_data0(pipe); 240 usbhs_pipe_enable(pipe); 241 } 242 243 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 244 245 usbhs_pkt_start(pipe); 246 247 return 0; 248 } 249 250 static struct usbhsg_recip_handle req_clear_feature = { 251 .name = "clear feature", 252 .device = usbhsg_recip_handler_std_control_done, 253 .interface = usbhsg_recip_handler_std_control_done, 254 .endpoint = usbhsg_recip_handler_std_clear_endpoint, 255 }; 256 257 /* 258 * USB_TYPE_STANDARD / set feature functions 259 */ 260 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv, 261 struct usbhsg_uep *uep, 262 struct usb_ctrlrequest *ctrl) 263 { 264 switch (le16_to_cpu(ctrl->wValue)) { 265 case USB_DEVICE_TEST_MODE: 266 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 267 udelay(100); 268 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex) >> 8); 269 break; 270 default: 271 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 272 break; 273 } 274 275 return 0; 276 } 277 278 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv, 279 struct usbhsg_uep *uep, 280 struct usb_ctrlrequest *ctrl) 281 { 282 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 283 284 usbhs_pipe_stall(pipe); 285 286 usbhsg_recip_handler_std_control_done(priv, uep, ctrl); 287 288 return 0; 289 } 290 291 static struct usbhsg_recip_handle req_set_feature = { 292 .name = "set feature", 293 .device = usbhsg_recip_handler_std_set_device, 294 .interface = usbhsg_recip_handler_std_control_done, 295 .endpoint = usbhsg_recip_handler_std_set_endpoint, 296 }; 297 298 /* 299 * USB_TYPE_STANDARD / get status functions 300 */ 301 static void __usbhsg_recip_send_complete(struct usb_ep *ep, 302 struct usb_request *req) 303 { 304 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 305 306 /* free allocated recip-buffer/usb_request */ 307 kfree(ureq->pkt.buf); 308 usb_ep_free_request(ep, req); 309 } 310 311 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv, 312 unsigned short status) 313 { 314 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 315 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 316 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 317 struct usb_request *req; 318 __le16 *buf; 319 320 /* alloc new usb_request for recip */ 321 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC); 322 if (!req) { 323 dev_err(dev, "recip request allocation fail\n"); 324 return; 325 } 326 327 /* alloc recip data buffer */ 328 buf = kmalloc(sizeof(*buf), GFP_ATOMIC); 329 if (!buf) { 330 usb_ep_free_request(&dcp->ep, req); 331 return; 332 } 333 334 /* recip data is status */ 335 *buf = cpu_to_le16(status); 336 337 /* allocated usb_request/buffer will be freed */ 338 req->complete = __usbhsg_recip_send_complete; 339 req->buf = buf; 340 req->length = sizeof(*buf); 341 req->zero = 0; 342 343 /* push packet */ 344 pipe->handler = &usbhs_fifo_pio_push_handler; 345 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req)); 346 } 347 348 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv, 349 struct usbhsg_uep *uep, 350 struct usb_ctrlrequest *ctrl) 351 { 352 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 353 unsigned short status = 0; 354 355 if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED)) 356 status = 1 << USB_DEVICE_SELF_POWERED; 357 358 __usbhsg_recip_send_status(gpriv, status); 359 360 return 0; 361 } 362 363 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv, 364 struct usbhsg_uep *uep, 365 struct usb_ctrlrequest *ctrl) 366 { 367 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 368 unsigned short status = 0; 369 370 __usbhsg_recip_send_status(gpriv, status); 371 372 return 0; 373 } 374 375 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv, 376 struct usbhsg_uep *uep, 377 struct usb_ctrlrequest *ctrl) 378 { 379 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 380 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 381 unsigned short status = 0; 382 383 if (usbhs_pipe_is_stall(pipe)) 384 status = 1 << USB_ENDPOINT_HALT; 385 386 __usbhsg_recip_send_status(gpriv, status); 387 388 return 0; 389 } 390 391 static struct usbhsg_recip_handle req_get_status = { 392 .name = "get status", 393 .device = usbhsg_recip_handler_std_get_device, 394 .interface = usbhsg_recip_handler_std_get_interface, 395 .endpoint = usbhsg_recip_handler_std_get_endpoint, 396 }; 397 398 /* 399 * USB_TYPE handler 400 */ 401 static int usbhsg_recip_run_handle(struct usbhs_priv *priv, 402 struct usbhsg_recip_handle *handler, 403 struct usb_ctrlrequest *ctrl) 404 { 405 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 406 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 407 struct usbhsg_uep *uep; 408 struct usbhs_pipe *pipe; 409 int recip = ctrl->bRequestType & USB_RECIP_MASK; 410 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; 411 int ret = 0; 412 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep, 413 struct usb_ctrlrequest *ctrl); 414 char *msg; 415 416 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth); 417 pipe = usbhsg_uep_to_pipe(uep); 418 if (!pipe) { 419 dev_err(dev, "wrong recip request\n"); 420 return -EINVAL; 421 } 422 423 switch (recip) { 424 case USB_RECIP_DEVICE: 425 msg = "DEVICE"; 426 func = handler->device; 427 break; 428 case USB_RECIP_INTERFACE: 429 msg = "INTERFACE"; 430 func = handler->interface; 431 break; 432 case USB_RECIP_ENDPOINT: 433 msg = "ENDPOINT"; 434 func = handler->endpoint; 435 break; 436 default: 437 dev_warn(dev, "unsupported RECIP(%d)\n", recip); 438 func = NULL; 439 ret = -EINVAL; 440 } 441 442 if (func) { 443 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg); 444 ret = func(priv, uep, ctrl); 445 } 446 447 return ret; 448 } 449 450 /* 451 * irq functions 452 * 453 * it will be called from usbhs_interrupt 454 */ 455 static int usbhsg_irq_dev_state(struct usbhs_priv *priv, 456 struct usbhs_irq_state *irq_state) 457 { 458 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 459 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 460 461 gpriv->gadget.speed = usbhs_bus_get_speed(priv); 462 463 dev_dbg(dev, "state = %x : speed : %d\n", 464 usbhs_status_get_device_state(irq_state), 465 gpriv->gadget.speed); 466 467 return 0; 468 } 469 470 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv, 471 struct usbhs_irq_state *irq_state) 472 { 473 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 474 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 475 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 476 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 477 struct usb_ctrlrequest ctrl; 478 struct usbhsg_recip_handle *recip_handler = NULL; 479 int stage = usbhs_status_get_ctrl_stage(irq_state); 480 int ret = 0; 481 482 dev_dbg(dev, "stage = %d\n", stage); 483 484 /* 485 * see Manual 486 * 487 * "Operation" 488 * - "Interrupt Function" 489 * - "Control Transfer Stage Transition Interrupt" 490 * - Fig. "Control Transfer Stage Transitions" 491 */ 492 493 switch (stage) { 494 case READ_DATA_STAGE: 495 pipe->handler = &usbhs_fifo_pio_push_handler; 496 break; 497 case WRITE_DATA_STAGE: 498 pipe->handler = &usbhs_fifo_pio_pop_handler; 499 break; 500 case NODATA_STATUS_STAGE: 501 pipe->handler = &usbhs_ctrl_stage_end_handler; 502 break; 503 case READ_STATUS_STAGE: 504 case WRITE_STATUS_STAGE: 505 usbhs_dcp_control_transfer_done(pipe); 506 /* fall through */ 507 default: 508 return ret; 509 } 510 511 /* 512 * get usb request 513 */ 514 usbhs_usbreq_get_val(priv, &ctrl); 515 516 switch (ctrl.bRequestType & USB_TYPE_MASK) { 517 case USB_TYPE_STANDARD: 518 switch (ctrl.bRequest) { 519 case USB_REQ_CLEAR_FEATURE: 520 recip_handler = &req_clear_feature; 521 break; 522 case USB_REQ_SET_FEATURE: 523 recip_handler = &req_set_feature; 524 break; 525 case USB_REQ_GET_STATUS: 526 recip_handler = &req_get_status; 527 break; 528 } 529 } 530 531 /* 532 * setup stage / run recip 533 */ 534 if (recip_handler) 535 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl); 536 else 537 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl); 538 539 if (ret < 0) 540 usbhs_pipe_stall(pipe); 541 542 return ret; 543 } 544 545 /* 546 * 547 * usb_dcp_ops 548 * 549 */ 550 static int usbhsg_pipe_disable(struct usbhsg_uep *uep) 551 { 552 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 553 struct usbhs_pkt *pkt; 554 555 while (1) { 556 pkt = usbhs_pkt_pop(pipe, NULL); 557 if (!pkt) 558 break; 559 560 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN); 561 } 562 563 usbhs_pipe_disable(pipe); 564 565 return 0; 566 } 567 568 /* 569 * 570 * usb_ep_ops 571 * 572 */ 573 static int usbhsg_ep_enable(struct usb_ep *ep, 574 const struct usb_endpoint_descriptor *desc) 575 { 576 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 577 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 578 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 579 struct usbhs_pipe *pipe; 580 int ret = -EIO; 581 unsigned long flags; 582 583 usbhs_lock(priv, flags); 584 585 /* 586 * if it already have pipe, 587 * nothing to do 588 */ 589 if (uep->pipe) { 590 usbhs_pipe_clear(uep->pipe); 591 usbhs_pipe_sequence_data0(uep->pipe); 592 ret = 0; 593 goto usbhsg_ep_enable_end; 594 } 595 596 pipe = usbhs_pipe_malloc(priv, 597 usb_endpoint_type(desc), 598 usb_endpoint_dir_in(desc)); 599 if (pipe) { 600 uep->pipe = pipe; 601 pipe->mod_private = uep; 602 603 /* set epnum / maxp */ 604 usbhs_pipe_config_update(pipe, 0, 605 usb_endpoint_num(desc), 606 usb_endpoint_maxp(desc)); 607 608 /* 609 * usbhs_fifo_dma_push/pop_handler try to 610 * use dmaengine if possible. 611 * It will use pio handler if impossible. 612 */ 613 if (usb_endpoint_dir_in(desc)) { 614 pipe->handler = &usbhs_fifo_dma_push_handler; 615 } else { 616 pipe->handler = &usbhs_fifo_dma_pop_handler; 617 usbhs_xxxsts_clear(priv, BRDYSTS, 618 usbhs_pipe_number(pipe)); 619 } 620 621 ret = 0; 622 } 623 624 usbhsg_ep_enable_end: 625 usbhs_unlock(priv, flags); 626 627 return ret; 628 } 629 630 static int usbhsg_ep_disable(struct usb_ep *ep) 631 { 632 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 633 struct usbhs_pipe *pipe; 634 unsigned long flags; 635 636 spin_lock_irqsave(&uep->lock, flags); 637 pipe = usbhsg_uep_to_pipe(uep); 638 if (!pipe) 639 goto out; 640 641 usbhsg_pipe_disable(uep); 642 usbhs_pipe_free(pipe); 643 644 uep->pipe->mod_private = NULL; 645 uep->pipe = NULL; 646 647 out: 648 spin_unlock_irqrestore(&uep->lock, flags); 649 650 return 0; 651 } 652 653 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 654 gfp_t gfp_flags) 655 { 656 struct usbhsg_request *ureq; 657 658 ureq = kzalloc(sizeof *ureq, gfp_flags); 659 if (!ureq) 660 return NULL; 661 662 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 663 664 return &ureq->req; 665 } 666 667 static void usbhsg_ep_free_request(struct usb_ep *ep, 668 struct usb_request *req) 669 { 670 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 671 672 WARN_ON(!list_empty(&ureq->pkt.node)); 673 kfree(ureq); 674 } 675 676 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 677 gfp_t gfp_flags) 678 { 679 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 680 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 681 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 682 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 683 684 /* param check */ 685 if (usbhsg_is_not_connected(gpriv) || 686 unlikely(!gpriv->driver) || 687 unlikely(!pipe)) 688 return -ESHUTDOWN; 689 690 usbhsg_queue_push(uep, ureq); 691 692 return 0; 693 } 694 695 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 696 { 697 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 698 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 699 struct usbhs_pipe *pipe; 700 unsigned long flags; 701 702 spin_lock_irqsave(&uep->lock, flags); 703 pipe = usbhsg_uep_to_pipe(uep); 704 if (pipe) 705 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 706 707 /* 708 * To dequeue a request, this driver should call the usbhsg_queue_pop() 709 * even if the pipe is NULL. 710 */ 711 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 712 spin_unlock_irqrestore(&uep->lock, flags); 713 714 return 0; 715 } 716 717 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 718 { 719 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 720 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 721 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 722 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 723 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 724 unsigned long flags; 725 int ret = 0; 726 727 dev_dbg(dev, "set halt %d (pipe %d)\n", 728 halt, usbhs_pipe_number(pipe)); 729 730 /******************** spin lock ********************/ 731 usbhs_lock(priv, flags); 732 733 /* 734 * According to usb_ep_set_halt()'s description, this function should 735 * return -EAGAIN if the IN endpoint has any queue or data. Note 736 * that the usbhs_pipe_is_dir_in() returns false if the pipe is an 737 * IN endpoint in the gadget mode. 738 */ 739 if (!usbhs_pipe_is_dir_in(pipe) && (__usbhsf_pkt_get(pipe) || 740 usbhs_pipe_contains_transmittable_data(pipe))) { 741 ret = -EAGAIN; 742 goto out; 743 } 744 745 if (halt) 746 usbhs_pipe_stall(pipe); 747 else 748 usbhs_pipe_disable(pipe); 749 750 if (halt && wedge) 751 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 752 else 753 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 754 755 out: 756 usbhs_unlock(priv, flags); 757 /******************** spin unlock ******************/ 758 759 return ret; 760 } 761 762 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 763 { 764 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 765 } 766 767 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 768 { 769 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 770 } 771 772 static const struct usb_ep_ops usbhsg_ep_ops = { 773 .enable = usbhsg_ep_enable, 774 .disable = usbhsg_ep_disable, 775 776 .alloc_request = usbhsg_ep_alloc_request, 777 .free_request = usbhsg_ep_free_request, 778 779 .queue = usbhsg_ep_queue, 780 .dequeue = usbhsg_ep_dequeue, 781 782 .set_halt = usbhsg_ep_set_halt, 783 .set_wedge = usbhsg_ep_set_wedge, 784 }; 785 786 /* 787 * pullup control 788 */ 789 static int usbhsg_can_pullup(struct usbhs_priv *priv) 790 { 791 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 792 793 return gpriv->driver && 794 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT); 795 } 796 797 static void usbhsg_update_pullup(struct usbhs_priv *priv) 798 { 799 if (usbhsg_can_pullup(priv)) 800 usbhs_sys_function_pullup(priv, 1); 801 else 802 usbhs_sys_function_pullup(priv, 0); 803 } 804 805 /* 806 * usb module start/end 807 */ 808 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 809 { 810 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 811 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 812 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 813 struct device *dev = usbhs_priv_to_dev(priv); 814 unsigned long flags; 815 int ret = 0; 816 817 /******************** spin lock ********************/ 818 usbhs_lock(priv, flags); 819 820 usbhsg_status_set(gpriv, status); 821 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 822 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 823 ret = -1; /* not ready */ 824 825 usbhs_unlock(priv, flags); 826 /******************** spin unlock ********************/ 827 828 if (ret < 0) 829 return 0; /* not ready is not error */ 830 831 /* 832 * enable interrupt and systems if ready 833 */ 834 dev_dbg(dev, "start gadget\n"); 835 836 /* 837 * pipe initialize and enable DCP 838 */ 839 usbhs_fifo_init(priv); 840 usbhs_pipe_init(priv, 841 usbhsg_dma_map_ctrl); 842 843 /* dcp init instead of usbhsg_ep_enable() */ 844 dcp->pipe = usbhs_dcp_malloc(priv); 845 dcp->pipe->mod_private = dcp; 846 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 847 848 /* 849 * system config enble 850 * - HI speed 851 * - function 852 * - usb module 853 */ 854 usbhs_sys_function_ctrl(priv, 1); 855 usbhsg_update_pullup(priv); 856 857 /* 858 * enable irq callback 859 */ 860 mod->irq_dev_state = usbhsg_irq_dev_state; 861 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 862 usbhs_irq_callback_update(priv, mod); 863 864 return 0; 865 } 866 867 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 868 { 869 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 870 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 871 struct usbhsg_uep *uep; 872 struct device *dev = usbhs_priv_to_dev(priv); 873 unsigned long flags; 874 int ret = 0, i; 875 876 /******************** spin lock ********************/ 877 usbhs_lock(priv, flags); 878 879 usbhsg_status_clr(gpriv, status); 880 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 881 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 882 ret = -1; /* already done */ 883 884 usbhs_unlock(priv, flags); 885 /******************** spin unlock ********************/ 886 887 if (ret < 0) 888 return 0; /* already done is not error */ 889 890 /* 891 * disable interrupt and systems if 1st try 892 */ 893 usbhs_fifo_quit(priv); 894 895 /* disable all irq */ 896 mod->irq_dev_state = NULL; 897 mod->irq_ctrl_stage = NULL; 898 usbhs_irq_callback_update(priv, mod); 899 900 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 901 902 /* disable sys */ 903 usbhs_sys_set_test_mode(priv, 0); 904 usbhs_sys_function_ctrl(priv, 0); 905 906 /* disable all eps */ 907 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) 908 usbhsg_ep_disable(&uep->ep); 909 910 dev_dbg(dev, "stop gadget\n"); 911 912 return 0; 913 } 914 915 /* 916 * VBUS provided by the PHY 917 */ 918 static int usbhsm_phy_get_vbus(struct platform_device *pdev) 919 { 920 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 921 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 922 923 return gpriv->vbus_active; 924 } 925 926 static void usbhs_mod_phy_mode(struct usbhs_priv *priv) 927 { 928 struct usbhs_mod_info *info = &priv->mod_info; 929 930 info->irq_vbus = NULL; 931 info->get_vbus = usbhsm_phy_get_vbus; 932 933 usbhs_irq_callback_update(priv, NULL); 934 } 935 936 /* 937 * 938 * linux usb function 939 * 940 */ 941 static int usbhsg_gadget_start(struct usb_gadget *gadget, 942 struct usb_gadget_driver *driver) 943 { 944 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 945 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 946 struct device *dev = usbhs_priv_to_dev(priv); 947 int ret; 948 949 if (!driver || 950 !driver->setup || 951 driver->max_speed < USB_SPEED_FULL) 952 return -EINVAL; 953 954 /* connect to bus through transceiver */ 955 if (!IS_ERR_OR_NULL(gpriv->transceiver)) { 956 ret = otg_set_peripheral(gpriv->transceiver->otg, 957 &gpriv->gadget); 958 if (ret) { 959 dev_err(dev, "%s: can't bind to transceiver\n", 960 gpriv->gadget.name); 961 return ret; 962 } 963 964 /* get vbus using phy versions */ 965 usbhs_mod_phy_mode(priv); 966 } 967 968 /* first hook up the driver ... */ 969 gpriv->driver = driver; 970 971 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 972 } 973 974 static int usbhsg_gadget_stop(struct usb_gadget *gadget) 975 { 976 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 977 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 978 979 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 980 981 if (!IS_ERR_OR_NULL(gpriv->transceiver)) 982 otg_set_peripheral(gpriv->transceiver->otg, NULL); 983 984 gpriv->driver = NULL; 985 986 return 0; 987 } 988 989 /* 990 * usb gadget ops 991 */ 992 static int usbhsg_get_frame(struct usb_gadget *gadget) 993 { 994 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 995 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 996 997 return usbhs_frame_get_num(priv); 998 } 999 1000 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on) 1001 { 1002 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1003 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1004 unsigned long flags; 1005 1006 usbhs_lock(priv, flags); 1007 if (is_on) 1008 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT); 1009 else 1010 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT); 1011 usbhsg_update_pullup(priv); 1012 usbhs_unlock(priv, flags); 1013 1014 return 0; 1015 } 1016 1017 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self) 1018 { 1019 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1020 1021 if (is_self) 1022 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED); 1023 else 1024 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED); 1025 1026 gadget->is_selfpowered = (is_self != 0); 1027 1028 return 0; 1029 } 1030 1031 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active) 1032 { 1033 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1034 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1035 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 1036 1037 gpriv->vbus_active = !!is_active; 1038 1039 usbhsc_schedule_notify_hotplug(pdev); 1040 1041 return 0; 1042 } 1043 1044 static const struct usb_gadget_ops usbhsg_gadget_ops = { 1045 .get_frame = usbhsg_get_frame, 1046 .set_selfpowered = usbhsg_set_selfpowered, 1047 .udc_start = usbhsg_gadget_start, 1048 .udc_stop = usbhsg_gadget_stop, 1049 .pullup = usbhsg_pullup, 1050 .vbus_session = usbhsg_vbus_session, 1051 }; 1052 1053 static int usbhsg_start(struct usbhs_priv *priv) 1054 { 1055 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 1056 } 1057 1058 static int usbhsg_stop(struct usbhs_priv *priv) 1059 { 1060 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1061 1062 /* cable disconnect */ 1063 if (gpriv->driver && 1064 gpriv->driver->disconnect) 1065 gpriv->driver->disconnect(&gpriv->gadget); 1066 1067 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 1068 } 1069 1070 int usbhs_mod_gadget_probe(struct usbhs_priv *priv) 1071 { 1072 struct usbhsg_gpriv *gpriv; 1073 struct usbhsg_uep *uep; 1074 struct device *dev = usbhs_priv_to_dev(priv); 1075 struct renesas_usbhs_driver_pipe_config *pipe_configs = 1076 usbhs_get_dparam(priv, pipe_configs); 1077 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1078 int i; 1079 int ret; 1080 1081 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 1082 if (!gpriv) 1083 return -ENOMEM; 1084 1085 uep = kcalloc(pipe_size, sizeof(struct usbhsg_uep), GFP_KERNEL); 1086 if (!uep) { 1087 ret = -ENOMEM; 1088 goto usbhs_mod_gadget_probe_err_gpriv; 1089 } 1090 1091 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED); 1092 dev_info(dev, "%stransceiver found\n", 1093 !IS_ERR(gpriv->transceiver) ? "" : "no "); 1094 1095 /* 1096 * CAUTION 1097 * 1098 * There is no guarantee that it is possible to access usb module here. 1099 * Don't accesses to it. 1100 * The accesse will be enable after "usbhsg_start" 1101 */ 1102 1103 /* 1104 * register itself 1105 */ 1106 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 1107 1108 /* init gpriv */ 1109 gpriv->mod.name = "gadget"; 1110 gpriv->mod.start = usbhsg_start; 1111 gpriv->mod.stop = usbhsg_stop; 1112 gpriv->uep = uep; 1113 gpriv->uep_size = pipe_size; 1114 usbhsg_status_init(gpriv); 1115 1116 /* 1117 * init gadget 1118 */ 1119 gpriv->gadget.dev.parent = dev; 1120 gpriv->gadget.name = "renesas_usbhs_udc"; 1121 gpriv->gadget.ops = &usbhsg_gadget_ops; 1122 gpriv->gadget.max_speed = USB_SPEED_HIGH; 1123 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv, 1124 has_usb_dmac); 1125 1126 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 1127 1128 /* 1129 * init usb_ep 1130 */ 1131 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 1132 uep->gpriv = gpriv; 1133 uep->pipe = NULL; 1134 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 1135 1136 uep->ep.name = uep->ep_name; 1137 uep->ep.ops = &usbhsg_ep_ops; 1138 INIT_LIST_HEAD(&uep->ep.ep_list); 1139 spin_lock_init(&uep->lock); 1140 1141 /* init DCP */ 1142 if (usbhsg_is_dcp(uep)) { 1143 gpriv->gadget.ep0 = &uep->ep; 1144 usb_ep_set_maxpacket_limit(&uep->ep, 64); 1145 uep->ep.caps.type_control = true; 1146 } else { 1147 /* init normal pipe */ 1148 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC) 1149 uep->ep.caps.type_iso = true; 1150 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK) 1151 uep->ep.caps.type_bulk = true; 1152 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT) 1153 uep->ep.caps.type_int = true; 1154 usb_ep_set_maxpacket_limit(&uep->ep, 1155 pipe_configs[i].bufsize); 1156 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 1157 } 1158 uep->ep.caps.dir_in = true; 1159 uep->ep.caps.dir_out = true; 1160 } 1161 1162 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 1163 if (ret) 1164 goto err_add_udc; 1165 1166 1167 dev_info(dev, "gadget probed\n"); 1168 1169 return 0; 1170 1171 err_add_udc: 1172 kfree(gpriv->uep); 1173 1174 usbhs_mod_gadget_probe_err_gpriv: 1175 kfree(gpriv); 1176 1177 return ret; 1178 } 1179 1180 void usbhs_mod_gadget_remove(struct usbhs_priv *priv) 1181 { 1182 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1183 1184 usb_del_gadget_udc(&gpriv->gadget); 1185 1186 kfree(gpriv->uep); 1187 kfree(gpriv); 1188 } 1189