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 int state = usbhs_status_get_device_state(irq_state); 461 462 gpriv->gadget.speed = usbhs_bus_get_speed(priv); 463 464 dev_dbg(dev, "state = %x : speed : %d\n", state, gpriv->gadget.speed); 465 466 if (gpriv->gadget.speed != USB_SPEED_UNKNOWN && 467 (state & SUSPENDED_STATE)) { 468 if (gpriv->driver && gpriv->driver->suspend) 469 gpriv->driver->suspend(&gpriv->gadget); 470 usb_gadget_set_state(&gpriv->gadget, USB_STATE_SUSPENDED); 471 } 472 473 return 0; 474 } 475 476 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv, 477 struct usbhs_irq_state *irq_state) 478 { 479 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 480 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 481 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); 482 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 483 struct usb_ctrlrequest ctrl; 484 struct usbhsg_recip_handle *recip_handler = NULL; 485 int stage = usbhs_status_get_ctrl_stage(irq_state); 486 int ret = 0; 487 488 dev_dbg(dev, "stage = %d\n", stage); 489 490 /* 491 * see Manual 492 * 493 * "Operation" 494 * - "Interrupt Function" 495 * - "Control Transfer Stage Transition Interrupt" 496 * - Fig. "Control Transfer Stage Transitions" 497 */ 498 499 switch (stage) { 500 case READ_DATA_STAGE: 501 pipe->handler = &usbhs_fifo_pio_push_handler; 502 break; 503 case WRITE_DATA_STAGE: 504 pipe->handler = &usbhs_fifo_pio_pop_handler; 505 break; 506 case NODATA_STATUS_STAGE: 507 pipe->handler = &usbhs_ctrl_stage_end_handler; 508 break; 509 case READ_STATUS_STAGE: 510 case WRITE_STATUS_STAGE: 511 usbhs_dcp_control_transfer_done(pipe); 512 fallthrough; 513 default: 514 return ret; 515 } 516 517 /* 518 * get usb request 519 */ 520 usbhs_usbreq_get_val(priv, &ctrl); 521 522 switch (ctrl.bRequestType & USB_TYPE_MASK) { 523 case USB_TYPE_STANDARD: 524 switch (ctrl.bRequest) { 525 case USB_REQ_CLEAR_FEATURE: 526 recip_handler = &req_clear_feature; 527 break; 528 case USB_REQ_SET_FEATURE: 529 recip_handler = &req_set_feature; 530 break; 531 case USB_REQ_GET_STATUS: 532 recip_handler = &req_get_status; 533 break; 534 } 535 } 536 537 /* 538 * setup stage / run recip 539 */ 540 if (recip_handler) 541 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl); 542 else 543 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl); 544 545 if (ret < 0) 546 usbhs_pipe_stall(pipe); 547 548 return ret; 549 } 550 551 /* 552 * 553 * usb_dcp_ops 554 * 555 */ 556 static int usbhsg_pipe_disable(struct usbhsg_uep *uep) 557 { 558 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 559 struct usbhs_pkt *pkt; 560 561 while (1) { 562 pkt = usbhs_pkt_pop(pipe, NULL); 563 if (!pkt) 564 break; 565 566 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN); 567 } 568 569 usbhs_pipe_disable(pipe); 570 571 return 0; 572 } 573 574 /* 575 * 576 * usb_ep_ops 577 * 578 */ 579 static int usbhsg_ep_enable(struct usb_ep *ep, 580 const struct usb_endpoint_descriptor *desc) 581 { 582 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 583 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 584 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 585 struct usbhs_pipe *pipe; 586 int ret = -EIO; 587 unsigned long flags; 588 589 usbhs_lock(priv, flags); 590 591 /* 592 * if it already have pipe, 593 * nothing to do 594 */ 595 if (uep->pipe) { 596 usbhs_pipe_clear(uep->pipe); 597 usbhs_pipe_sequence_data0(uep->pipe); 598 ret = 0; 599 goto usbhsg_ep_enable_end; 600 } 601 602 pipe = usbhs_pipe_malloc(priv, 603 usb_endpoint_type(desc), 604 usb_endpoint_dir_in(desc)); 605 if (pipe) { 606 uep->pipe = pipe; 607 pipe->mod_private = uep; 608 609 /* set epnum / maxp */ 610 usbhs_pipe_config_update(pipe, 0, 611 usb_endpoint_num(desc), 612 usb_endpoint_maxp(desc)); 613 614 /* 615 * usbhs_fifo_dma_push/pop_handler try to 616 * use dmaengine if possible. 617 * It will use pio handler if impossible. 618 */ 619 if (usb_endpoint_dir_in(desc)) { 620 pipe->handler = &usbhs_fifo_dma_push_handler; 621 } else { 622 pipe->handler = &usbhs_fifo_dma_pop_handler; 623 usbhs_xxxsts_clear(priv, BRDYSTS, 624 usbhs_pipe_number(pipe)); 625 } 626 627 ret = 0; 628 } 629 630 usbhsg_ep_enable_end: 631 usbhs_unlock(priv, flags); 632 633 return ret; 634 } 635 636 static int usbhsg_ep_disable(struct usb_ep *ep) 637 { 638 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 639 struct usbhs_pipe *pipe; 640 unsigned long flags; 641 642 spin_lock_irqsave(&uep->lock, flags); 643 pipe = usbhsg_uep_to_pipe(uep); 644 if (!pipe) 645 goto out; 646 647 usbhsg_pipe_disable(uep); 648 usbhs_pipe_free(pipe); 649 650 uep->pipe->mod_private = NULL; 651 uep->pipe = NULL; 652 653 out: 654 spin_unlock_irqrestore(&uep->lock, flags); 655 656 return 0; 657 } 658 659 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, 660 gfp_t gfp_flags) 661 { 662 struct usbhsg_request *ureq; 663 664 ureq = kzalloc(sizeof *ureq, gfp_flags); 665 if (!ureq) 666 return NULL; 667 668 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); 669 670 return &ureq->req; 671 } 672 673 static void usbhsg_ep_free_request(struct usb_ep *ep, 674 struct usb_request *req) 675 { 676 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 677 678 WARN_ON(!list_empty(&ureq->pkt.node)); 679 kfree(ureq); 680 } 681 682 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, 683 gfp_t gfp_flags) 684 { 685 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 686 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 687 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 688 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 689 690 /* param check */ 691 if (usbhsg_is_not_connected(gpriv) || 692 unlikely(!gpriv->driver) || 693 unlikely(!pipe)) 694 return -ESHUTDOWN; 695 696 usbhsg_queue_push(uep, ureq); 697 698 return 0; 699 } 700 701 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) 702 { 703 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 704 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); 705 struct usbhs_pipe *pipe; 706 unsigned long flags; 707 708 spin_lock_irqsave(&uep->lock, flags); 709 pipe = usbhsg_uep_to_pipe(uep); 710 if (pipe) 711 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq)); 712 713 /* 714 * To dequeue a request, this driver should call the usbhsg_queue_pop() 715 * even if the pipe is NULL. 716 */ 717 usbhsg_queue_pop(uep, ureq, -ECONNRESET); 718 spin_unlock_irqrestore(&uep->lock, flags); 719 720 return 0; 721 } 722 723 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) 724 { 725 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); 726 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); 727 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); 728 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 729 struct device *dev = usbhsg_gpriv_to_dev(gpriv); 730 unsigned long flags; 731 int ret = 0; 732 733 dev_dbg(dev, "set halt %d (pipe %d)\n", 734 halt, usbhs_pipe_number(pipe)); 735 736 /******************** spin lock ********************/ 737 usbhs_lock(priv, flags); 738 739 /* 740 * According to usb_ep_set_halt()'s description, this function should 741 * return -EAGAIN if the IN endpoint has any queue or data. Note 742 * that the usbhs_pipe_is_dir_in() returns false if the pipe is an 743 * IN endpoint in the gadget mode. 744 */ 745 if (!usbhs_pipe_is_dir_in(pipe) && (__usbhsf_pkt_get(pipe) || 746 usbhs_pipe_contains_transmittable_data(pipe))) { 747 ret = -EAGAIN; 748 goto out; 749 } 750 751 if (halt) 752 usbhs_pipe_stall(pipe); 753 else 754 usbhs_pipe_disable(pipe); 755 756 if (halt && wedge) 757 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); 758 else 759 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); 760 761 out: 762 usbhs_unlock(priv, flags); 763 /******************** spin unlock ******************/ 764 765 return ret; 766 } 767 768 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) 769 { 770 return __usbhsg_ep_set_halt_wedge(ep, value, 0); 771 } 772 773 static int usbhsg_ep_set_wedge(struct usb_ep *ep) 774 { 775 return __usbhsg_ep_set_halt_wedge(ep, 1, 1); 776 } 777 778 static const struct usb_ep_ops usbhsg_ep_ops = { 779 .enable = usbhsg_ep_enable, 780 .disable = usbhsg_ep_disable, 781 782 .alloc_request = usbhsg_ep_alloc_request, 783 .free_request = usbhsg_ep_free_request, 784 785 .queue = usbhsg_ep_queue, 786 .dequeue = usbhsg_ep_dequeue, 787 788 .set_halt = usbhsg_ep_set_halt, 789 .set_wedge = usbhsg_ep_set_wedge, 790 }; 791 792 /* 793 * pullup control 794 */ 795 static int usbhsg_can_pullup(struct usbhs_priv *priv) 796 { 797 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 798 799 return gpriv->driver && 800 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT); 801 } 802 803 static void usbhsg_update_pullup(struct usbhs_priv *priv) 804 { 805 if (usbhsg_can_pullup(priv)) 806 usbhs_sys_function_pullup(priv, 1); 807 else 808 usbhs_sys_function_pullup(priv, 0); 809 } 810 811 /* 812 * usb module start/end 813 */ 814 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) 815 { 816 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 817 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); 818 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 819 struct device *dev = usbhs_priv_to_dev(priv); 820 unsigned long flags; 821 int ret = 0; 822 823 /******************** spin lock ********************/ 824 usbhs_lock(priv, flags); 825 826 usbhsg_status_set(gpriv, status); 827 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 828 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) 829 ret = -1; /* not ready */ 830 831 usbhs_unlock(priv, flags); 832 /******************** spin unlock ********************/ 833 834 if (ret < 0) 835 return 0; /* not ready is not error */ 836 837 /* 838 * enable interrupt and systems if ready 839 */ 840 dev_dbg(dev, "start gadget\n"); 841 842 /* 843 * pipe initialize and enable DCP 844 */ 845 usbhs_fifo_init(priv); 846 usbhs_pipe_init(priv, 847 usbhsg_dma_map_ctrl); 848 849 /* dcp init instead of usbhsg_ep_enable() */ 850 dcp->pipe = usbhs_dcp_malloc(priv); 851 dcp->pipe->mod_private = dcp; 852 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64); 853 854 /* 855 * system config enble 856 * - HI speed 857 * - function 858 * - usb module 859 */ 860 usbhs_sys_function_ctrl(priv, 1); 861 usbhsg_update_pullup(priv); 862 863 /* 864 * enable irq callback 865 */ 866 mod->irq_dev_state = usbhsg_irq_dev_state; 867 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; 868 usbhs_irq_callback_update(priv, mod); 869 870 return 0; 871 } 872 873 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) 874 { 875 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 876 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 877 struct usbhsg_uep *uep; 878 struct device *dev = usbhs_priv_to_dev(priv); 879 unsigned long flags; 880 int ret = 0, i; 881 882 /******************** spin lock ********************/ 883 usbhs_lock(priv, flags); 884 885 usbhsg_status_clr(gpriv, status); 886 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && 887 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) 888 ret = -1; /* already done */ 889 890 usbhs_unlock(priv, flags); 891 /******************** spin unlock ********************/ 892 893 if (ret < 0) 894 return 0; /* already done is not error */ 895 896 /* 897 * disable interrupt and systems if 1st try 898 */ 899 usbhs_fifo_quit(priv); 900 901 /* disable all irq */ 902 mod->irq_dev_state = NULL; 903 mod->irq_ctrl_stage = NULL; 904 usbhs_irq_callback_update(priv, mod); 905 906 gpriv->gadget.speed = USB_SPEED_UNKNOWN; 907 908 /* disable sys */ 909 usbhs_sys_set_test_mode(priv, 0); 910 usbhs_sys_function_ctrl(priv, 0); 911 912 /* disable all eps */ 913 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) 914 usbhsg_ep_disable(&uep->ep); 915 916 dev_dbg(dev, "stop gadget\n"); 917 918 return 0; 919 } 920 921 /* 922 * VBUS provided by the PHY 923 */ 924 static int usbhsm_phy_get_vbus(struct platform_device *pdev) 925 { 926 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); 927 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 928 929 return gpriv->vbus_active; 930 } 931 932 static void usbhs_mod_phy_mode(struct usbhs_priv *priv) 933 { 934 struct usbhs_mod_info *info = &priv->mod_info; 935 936 info->irq_vbus = NULL; 937 info->get_vbus = usbhsm_phy_get_vbus; 938 939 usbhs_irq_callback_update(priv, NULL); 940 } 941 942 /* 943 * 944 * linux usb function 945 * 946 */ 947 static int usbhsg_gadget_start(struct usb_gadget *gadget, 948 struct usb_gadget_driver *driver) 949 { 950 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 951 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 952 struct device *dev = usbhs_priv_to_dev(priv); 953 int ret; 954 955 if (!driver || 956 !driver->setup || 957 driver->max_speed < USB_SPEED_FULL) 958 return -EINVAL; 959 960 /* connect to bus through transceiver */ 961 if (!IS_ERR_OR_NULL(gpriv->transceiver)) { 962 ret = otg_set_peripheral(gpriv->transceiver->otg, 963 &gpriv->gadget); 964 if (ret) { 965 dev_err(dev, "%s: can't bind to transceiver\n", 966 gpriv->gadget.name); 967 return ret; 968 } 969 970 /* get vbus using phy versions */ 971 usbhs_mod_phy_mode(priv); 972 } 973 974 /* first hook up the driver ... */ 975 gpriv->driver = driver; 976 977 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); 978 } 979 980 static int usbhsg_gadget_stop(struct usb_gadget *gadget) 981 { 982 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 983 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 984 985 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); 986 987 if (!IS_ERR_OR_NULL(gpriv->transceiver)) 988 otg_set_peripheral(gpriv->transceiver->otg, NULL); 989 990 gpriv->driver = NULL; 991 992 return 0; 993 } 994 995 /* 996 * usb gadget ops 997 */ 998 static int usbhsg_get_frame(struct usb_gadget *gadget) 999 { 1000 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1001 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1002 1003 return usbhs_frame_get_num(priv); 1004 } 1005 1006 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on) 1007 { 1008 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1009 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1010 unsigned long flags; 1011 1012 usbhs_lock(priv, flags); 1013 if (is_on) 1014 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT); 1015 else 1016 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT); 1017 usbhsg_update_pullup(priv); 1018 usbhs_unlock(priv, flags); 1019 1020 return 0; 1021 } 1022 1023 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self) 1024 { 1025 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1026 1027 if (is_self) 1028 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED); 1029 else 1030 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED); 1031 1032 gadget->is_selfpowered = (is_self != 0); 1033 1034 return 0; 1035 } 1036 1037 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active) 1038 { 1039 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); 1040 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); 1041 struct platform_device *pdev = usbhs_priv_to_pdev(priv); 1042 1043 gpriv->vbus_active = !!is_active; 1044 1045 usbhsc_schedule_notify_hotplug(pdev); 1046 1047 return 0; 1048 } 1049 1050 static const struct usb_gadget_ops usbhsg_gadget_ops = { 1051 .get_frame = usbhsg_get_frame, 1052 .set_selfpowered = usbhsg_set_selfpowered, 1053 .udc_start = usbhsg_gadget_start, 1054 .udc_stop = usbhsg_gadget_stop, 1055 .pullup = usbhsg_pullup, 1056 .vbus_session = usbhsg_vbus_session, 1057 }; 1058 1059 static int usbhsg_start(struct usbhs_priv *priv) 1060 { 1061 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); 1062 } 1063 1064 static int usbhsg_stop(struct usbhs_priv *priv) 1065 { 1066 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1067 1068 /* cable disconnect */ 1069 if (gpriv->driver && 1070 gpriv->driver->disconnect) 1071 gpriv->driver->disconnect(&gpriv->gadget); 1072 1073 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); 1074 } 1075 1076 int usbhs_mod_gadget_probe(struct usbhs_priv *priv) 1077 { 1078 struct usbhsg_gpriv *gpriv; 1079 struct usbhsg_uep *uep; 1080 struct device *dev = usbhs_priv_to_dev(priv); 1081 struct renesas_usbhs_driver_pipe_config *pipe_configs = 1082 usbhs_get_dparam(priv, pipe_configs); 1083 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1084 int i; 1085 int ret; 1086 1087 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); 1088 if (!gpriv) 1089 return -ENOMEM; 1090 1091 uep = kcalloc(pipe_size, sizeof(struct usbhsg_uep), GFP_KERNEL); 1092 if (!uep) { 1093 ret = -ENOMEM; 1094 goto usbhs_mod_gadget_probe_err_gpriv; 1095 } 1096 1097 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED); 1098 dev_info(dev, "%stransceiver found\n", 1099 !IS_ERR(gpriv->transceiver) ? "" : "no "); 1100 1101 /* 1102 * CAUTION 1103 * 1104 * There is no guarantee that it is possible to access usb module here. 1105 * Don't accesses to it. 1106 * The accesse will be enable after "usbhsg_start" 1107 */ 1108 1109 /* 1110 * register itself 1111 */ 1112 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); 1113 1114 /* init gpriv */ 1115 gpriv->mod.name = "gadget"; 1116 gpriv->mod.start = usbhsg_start; 1117 gpriv->mod.stop = usbhsg_stop; 1118 gpriv->uep = uep; 1119 gpriv->uep_size = pipe_size; 1120 usbhsg_status_init(gpriv); 1121 1122 /* 1123 * init gadget 1124 */ 1125 gpriv->gadget.dev.parent = dev; 1126 gpriv->gadget.name = "renesas_usbhs_udc"; 1127 gpriv->gadget.ops = &usbhsg_gadget_ops; 1128 gpriv->gadget.max_speed = USB_SPEED_HIGH; 1129 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv, 1130 has_usb_dmac); 1131 1132 INIT_LIST_HEAD(&gpriv->gadget.ep_list); 1133 1134 /* 1135 * init usb_ep 1136 */ 1137 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { 1138 uep->gpriv = gpriv; 1139 uep->pipe = NULL; 1140 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); 1141 1142 uep->ep.name = uep->ep_name; 1143 uep->ep.ops = &usbhsg_ep_ops; 1144 INIT_LIST_HEAD(&uep->ep.ep_list); 1145 spin_lock_init(&uep->lock); 1146 1147 /* init DCP */ 1148 if (usbhsg_is_dcp(uep)) { 1149 gpriv->gadget.ep0 = &uep->ep; 1150 usb_ep_set_maxpacket_limit(&uep->ep, 64); 1151 uep->ep.caps.type_control = true; 1152 } else { 1153 /* init normal pipe */ 1154 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC) 1155 uep->ep.caps.type_iso = true; 1156 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK) 1157 uep->ep.caps.type_bulk = true; 1158 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT) 1159 uep->ep.caps.type_int = true; 1160 usb_ep_set_maxpacket_limit(&uep->ep, 1161 pipe_configs[i].bufsize); 1162 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); 1163 } 1164 uep->ep.caps.dir_in = true; 1165 uep->ep.caps.dir_out = true; 1166 } 1167 1168 ret = usb_add_gadget_udc(dev, &gpriv->gadget); 1169 if (ret) 1170 goto err_add_udc; 1171 1172 1173 dev_info(dev, "gadget probed\n"); 1174 1175 return 0; 1176 1177 err_add_udc: 1178 kfree(gpriv->uep); 1179 1180 usbhs_mod_gadget_probe_err_gpriv: 1181 kfree(gpriv); 1182 1183 return ret; 1184 } 1185 1186 void usbhs_mod_gadget_remove(struct usbhs_priv *priv) 1187 { 1188 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); 1189 1190 usb_del_gadget_udc(&gpriv->gadget); 1191 1192 kfree(gpriv->uep); 1193 kfree(gpriv); 1194 } 1195