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