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sys/dev/usb/usb_hub.c
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1 /* $FreeBSD: releng/12.0/sys/dev/usb/usb_hub.c 329454 2018-02-17 12:38:46Z hselasky $ */ 2 /*- 3 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 4 * 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved. 6 * Copyright (c) 1998 Lennart Augustsson. All rights reserved. 7 * Copyright (c) 2008-2010 Hans Petter Selasky. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * USB spec: http://www.usb.org/developers/docs/usbspec.zip 33 */ 34 35 #ifdef USB_GLOBAL_INCLUDE_FILE 36 #include USB_GLOBAL_INCLUDE_FILE 37 #else 38 #include <sys/stdint.h> 39 #include <sys/stddef.h> 40 #include <sys/param.h> 41 #include <sys/queue.h> 42 #include <sys/types.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/bus.h> 46 #include <sys/module.h> 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 #include <sys/condvar.h> 50 #include <sys/sysctl.h> 51 #include <sys/sx.h> 52 #include <sys/unistd.h> 53 #include <sys/callout.h> 54 #include <sys/malloc.h> 55 #include <sys/priv.h> 56 57 #include <dev/usb/usb.h> 58 #include <dev/usb/usbdi.h> 59 #include <dev/usb/usbdi_util.h> 60 61 #define USB_DEBUG_VAR uhub_debug 62 63 #include <dev/usb/usb_core.h> 64 #include <dev/usb/usb_process.h> 65 #include <dev/usb/usb_device.h> 66 #include <dev/usb/usb_request.h> 67 #include <dev/usb/usb_debug.h> 68 #include <dev/usb/usb_hub.h> 69 #include <dev/usb/usb_util.h> 70 #include <dev/usb/usb_busdma.h> 71 #include <dev/usb/usb_transfer.h> 72 #include <dev/usb/usb_dynamic.h> 73 74 #include <dev/usb/usb_controller.h> 75 #include <dev/usb/usb_bus.h> 76 #endif /* USB_GLOBAL_INCLUDE_FILE */ 77 78 #define UHUB_INTR_INTERVAL 250 /* ms */ 79 enum { 80 UHUB_INTR_TRANSFER, 81 #if USB_HAVE_TT_SUPPORT 82 UHUB_RESET_TT_TRANSFER, 83 #endif 84 UHUB_N_TRANSFER, 85 }; 86 87 #ifdef USB_DEBUG 88 static int uhub_debug = 0; 89 90 static SYSCTL_NODE(_hw_usb, OID_AUTO, uhub, CTLFLAG_RW, 0, "USB HUB"); 91 SYSCTL_INT(_hw_usb_uhub, OID_AUTO, debug, CTLFLAG_RWTUN, &uhub_debug, 0, 92 "Debug level"); 93 #endif 94 95 #if USB_HAVE_POWERD 96 static int usb_power_timeout = 30; /* seconds */ 97 98 SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_RWTUN, 99 &usb_power_timeout, 0, "USB power timeout"); 100 #endif 101 102 #if USB_HAVE_DISABLE_ENUM 103 static int usb_disable_enumeration = 0; 104 SYSCTL_INT(_hw_usb, OID_AUTO, disable_enumeration, CTLFLAG_RWTUN, 105 &usb_disable_enumeration, 0, "Set to disable all USB device enumeration. " 106 "This can secure against USB devices turning evil, " 107 "for example a USB memory stick becoming a USB keyboard."); 108 109 static int usb_disable_port_power = 0; 110 SYSCTL_INT(_hw_usb, OID_AUTO, disable_port_power, CTLFLAG_RWTUN, 111 &usb_disable_port_power, 0, "Set to disable all USB port power."); 112 #endif 113 114 struct uhub_current_state { 115 uint16_t port_change; 116 uint16_t port_status; 117 }; 118 119 struct uhub_softc { 120 struct uhub_current_state sc_st;/* current state */ 121 #if (USB_HAVE_FIXED_PORT != 0) 122 struct usb_hub sc_hub; 123 #endif 124 device_t sc_dev; /* base device */ 125 struct mtx sc_mtx; /* our mutex */ 126 struct usb_device *sc_udev; /* USB device */ 127 struct usb_xfer *sc_xfer[UHUB_N_TRANSFER]; /* interrupt xfer */ 128 #if USB_HAVE_DISABLE_ENUM 129 int sc_disable_enumeration; 130 int sc_disable_port_power; 131 #endif 132 uint8_t sc_flags; 133 #define UHUB_FLAG_DID_EXPLORE 0x01 134 }; 135 136 #define UHUB_PROTO(sc) ((sc)->sc_udev->ddesc.bDeviceProtocol) 137 #define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB) 138 #define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT) 139 #define UHUB_IS_MULTI_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBMTT) 140 #define UHUB_IS_SUPER_SPEED(sc) (UHUB_PROTO(sc) == UDPROTO_SSHUB) 141 142 /* prototypes for type checking: */ 143 144 static device_probe_t uhub_probe; 145 static device_attach_t uhub_attach; 146 static device_detach_t uhub_detach; 147 static device_suspend_t uhub_suspend; 148 static device_resume_t uhub_resume; 149 150 static bus_driver_added_t uhub_driver_added; 151 static bus_child_location_str_t uhub_child_location_string; 152 static bus_child_pnpinfo_str_t uhub_child_pnpinfo_string; 153 154 static usb_callback_t uhub_intr_callback; 155 #if USB_HAVE_TT_SUPPORT 156 static usb_callback_t uhub_reset_tt_callback; 157 #endif 158 159 static void usb_dev_resume_peer(struct usb_device *udev); 160 static void usb_dev_suspend_peer(struct usb_device *udev); 161 static uint8_t usb_peer_should_wakeup(struct usb_device *udev); 162 163 static const struct usb_config uhub_config[UHUB_N_TRANSFER] = { 164 165 [UHUB_INTR_TRANSFER] = { 166 .type = UE_INTERRUPT, 167 .endpoint = UE_ADDR_ANY, 168 .direction = UE_DIR_ANY, 169 .timeout = 0, 170 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 171 .bufsize = 0, /* use wMaxPacketSize */ 172 .callback = &uhub_intr_callback, 173 .interval = UHUB_INTR_INTERVAL, 174 }, 175 #if USB_HAVE_TT_SUPPORT 176 [UHUB_RESET_TT_TRANSFER] = { 177 .type = UE_CONTROL, 178 .endpoint = 0x00, /* Control pipe */ 179 .direction = UE_DIR_ANY, 180 .bufsize = sizeof(struct usb_device_request), 181 .callback = &uhub_reset_tt_callback, 182 .timeout = 1000, /* 1 second */ 183 .usb_mode = USB_MODE_HOST, 184 }, 185 #endif 186 }; 187 188 /* 189 * driver instance for "hub" connected to "usb" 190 * and "hub" connected to "hub" 191 */ 192 static devclass_t uhub_devclass; 193 194 static device_method_t uhub_methods[] = { 195 DEVMETHOD(device_probe, uhub_probe), 196 DEVMETHOD(device_attach, uhub_attach), 197 DEVMETHOD(device_detach, uhub_detach), 198 199 DEVMETHOD(device_suspend, uhub_suspend), 200 DEVMETHOD(device_resume, uhub_resume), 201 202 DEVMETHOD(bus_child_location_str, uhub_child_location_string), 203 DEVMETHOD(bus_child_pnpinfo_str, uhub_child_pnpinfo_string), 204 DEVMETHOD(bus_driver_added, uhub_driver_added), 205 DEVMETHOD_END 206 }; 207 208 static driver_t uhub_driver = { 209 .name = "uhub", 210 .methods = uhub_methods, 211 .size = sizeof(struct uhub_softc) 212 }; 213 214 DRIVER_MODULE(uhub, usbus, uhub_driver, uhub_devclass, 0, 0); 215 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, NULL, 0); 216 MODULE_VERSION(uhub, 1); 217 218 static void 219 uhub_intr_callback(struct usb_xfer *xfer, usb_error_t error) 220 { 221 struct uhub_softc *sc = usbd_xfer_softc(xfer); 222 223 switch (USB_GET_STATE(xfer)) { 224 case USB_ST_TRANSFERRED: 225 DPRINTFN(2, "\n"); 226 /* 227 * This is an indication that some port 228 * has changed status. Notify the bus 229 * event handler thread that we need 230 * to be explored again: 231 */ 232 usb_needs_explore(sc->sc_udev->bus, 0); 233 234 case USB_ST_SETUP: 235 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 236 usbd_transfer_submit(xfer); 237 break; 238 239 default: /* Error */ 240 if (xfer->error != USB_ERR_CANCELLED) { 241 /* 242 * Do a clear-stall. The "stall_pipe" flag 243 * will get cleared before next callback by 244 * the USB stack. 245 */ 246 usbd_xfer_set_stall(xfer); 247 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 248 usbd_transfer_submit(xfer); 249 } 250 break; 251 } 252 } 253 254 /*------------------------------------------------------------------------* 255 * uhub_reset_tt_proc 256 * 257 * This function starts the TT reset USB request 258 *------------------------------------------------------------------------*/ 259 #if USB_HAVE_TT_SUPPORT 260 static void 261 uhub_reset_tt_proc(struct usb_proc_msg *_pm) 262 { 263 struct usb_udev_msg *pm = (void *)_pm; 264 struct usb_device *udev = pm->udev; 265 struct usb_hub *hub; 266 struct uhub_softc *sc; 267 268 hub = udev->hub; 269 if (hub == NULL) 270 return; 271 sc = hub->hubsoftc; 272 if (sc == NULL) 273 return; 274 275 /* Change lock */ 276 USB_BUS_UNLOCK(udev->bus); 277 USB_MTX_LOCK(&sc->sc_mtx); 278 /* Start transfer */ 279 usbd_transfer_start(sc->sc_xfer[UHUB_RESET_TT_TRANSFER]); 280 /* Change lock */ 281 USB_MTX_UNLOCK(&sc->sc_mtx); 282 USB_BUS_LOCK(udev->bus); 283 } 284 #endif 285 286 /*------------------------------------------------------------------------* 287 * uhub_tt_buffer_reset_async_locked 288 * 289 * This function queues a TT reset for the given USB device and endpoint. 290 *------------------------------------------------------------------------*/ 291 #if USB_HAVE_TT_SUPPORT 292 void 293 uhub_tt_buffer_reset_async_locked(struct usb_device *child, struct usb_endpoint *ep) 294 { 295 struct usb_device_request req; 296 struct usb_device *udev; 297 struct usb_hub *hub; 298 struct usb_port *up; 299 uint16_t wValue; 300 uint8_t port; 301 302 if (child == NULL || ep == NULL) 303 return; 304 305 udev = child->parent_hs_hub; 306 port = child->hs_port_no; 307 308 if (udev == NULL) 309 return; 310 311 hub = udev->hub; 312 if ((hub == NULL) || 313 (udev->speed != USB_SPEED_HIGH) || 314 (child->speed != USB_SPEED_LOW && 315 child->speed != USB_SPEED_FULL) || 316 (child->flags.usb_mode != USB_MODE_HOST) || 317 (port == 0) || (ep->edesc == NULL)) { 318 /* not applicable */ 319 return; 320 } 321 322 USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED); 323 324 up = hub->ports + port - 1; 325 326 if (udev->ddesc.bDeviceClass == UDCLASS_HUB && 327 udev->ddesc.bDeviceProtocol == UDPROTO_HSHUBSTT) 328 port = 1; 329 330 /* if we already received a clear buffer request, reset the whole TT */ 331 if (up->req_reset_tt.bRequest != 0) { 332 req.bmRequestType = UT_WRITE_CLASS_OTHER; 333 req.bRequest = UR_RESET_TT; 334 USETW(req.wValue, 0); 335 req.wIndex[0] = port; 336 req.wIndex[1] = 0; 337 USETW(req.wLength, 0); 338 } else { 339 wValue = (ep->edesc->bEndpointAddress & 0xF) | 340 ((child->address & 0x7F) << 4) | 341 ((ep->edesc->bEndpointAddress & 0x80) << 8) | 342 ((ep->edesc->bmAttributes & 3) << 12); 343 344 req.bmRequestType = UT_WRITE_CLASS_OTHER; 345 req.bRequest = UR_CLEAR_TT_BUFFER; 346 USETW(req.wValue, wValue); 347 req.wIndex[0] = port; 348 req.wIndex[1] = 0; 349 USETW(req.wLength, 0); 350 } 351 up->req_reset_tt = req; 352 /* get reset transfer started */ 353 usb_proc_msignal(USB_BUS_TT_PROC(udev->bus), 354 &hub->tt_msg[0], &hub->tt_msg[1]); 355 } 356 #endif 357 358 #if USB_HAVE_TT_SUPPORT 359 static void 360 uhub_reset_tt_callback(struct usb_xfer *xfer, usb_error_t error) 361 { 362 struct uhub_softc *sc; 363 struct usb_device *udev; 364 struct usb_port *up; 365 uint8_t x; 366 367 DPRINTF("TT buffer reset\n"); 368 369 sc = usbd_xfer_softc(xfer); 370 udev = sc->sc_udev; 371 372 switch (USB_GET_STATE(xfer)) { 373 case USB_ST_TRANSFERRED: 374 case USB_ST_SETUP: 375 tr_setup: 376 USB_BUS_LOCK(udev->bus); 377 /* find first port which needs a TT reset */ 378 for (x = 0; x != udev->hub->nports; x++) { 379 up = udev->hub->ports + x; 380 381 if (up->req_reset_tt.bRequest == 0) 382 continue; 383 384 /* copy in the transfer */ 385 usbd_copy_in(xfer->frbuffers, 0, &up->req_reset_tt, 386 sizeof(up->req_reset_tt)); 387 /* reset buffer */ 388 memset(&up->req_reset_tt, 0, sizeof(up->req_reset_tt)); 389 390 /* set length */ 391 usbd_xfer_set_frame_len(xfer, 0, sizeof(up->req_reset_tt)); 392 xfer->nframes = 1; 393 USB_BUS_UNLOCK(udev->bus); 394 395 usbd_transfer_submit(xfer); 396 return; 397 } 398 USB_BUS_UNLOCK(udev->bus); 399 break; 400 401 default: 402 if (error == USB_ERR_CANCELLED) 403 break; 404 405 DPRINTF("TT buffer reset failed (%s)\n", usbd_errstr(error)); 406 goto tr_setup; 407 } 408 } 409 #endif 410 411 /*------------------------------------------------------------------------* 412 * uhub_count_active_host_ports 413 * 414 * This function counts the number of active ports at the given speed. 415 *------------------------------------------------------------------------*/ 416 uint8_t 417 uhub_count_active_host_ports(struct usb_device *udev, enum usb_dev_speed speed) 418 { 419 struct uhub_softc *sc; 420 struct usb_device *child; 421 struct usb_hub *hub; 422 struct usb_port *up; 423 uint8_t retval = 0; 424 uint8_t x; 425 426 if (udev == NULL) 427 goto done; 428 hub = udev->hub; 429 if (hub == NULL) 430 goto done; 431 sc = hub->hubsoftc; 432 if (sc == NULL) 433 goto done; 434 435 for (x = 0; x != hub->nports; x++) { 436 up = hub->ports + x; 437 child = usb_bus_port_get_device(udev->bus, up); 438 if (child != NULL && 439 child->flags.usb_mode == USB_MODE_HOST && 440 child->speed == speed) 441 retval++; 442 } 443 done: 444 return (retval); 445 } 446 447 void 448 uhub_explore_handle_re_enumerate(struct usb_device *child) 449 { 450 uint8_t do_unlock; 451 usb_error_t err; 452 453 /* check if device should be re-enumerated */ 454 if (child->flags.usb_mode != USB_MODE_HOST) 455 return; 456 457 do_unlock = usbd_enum_lock(child); 458 switch (child->re_enumerate_wait) { 459 case USB_RE_ENUM_START: 460 err = usbd_set_config_index(child, 461 USB_UNCONFIG_INDEX); 462 if (err != 0) { 463 DPRINTF("Unconfigure failed: %s: Ignored.\n", 464 usbd_errstr(err)); 465 } 466 if (child->parent_hub == NULL) { 467 /* the root HUB cannot be re-enumerated */ 468 DPRINTFN(6, "cannot reset root HUB\n"); 469 err = 0; 470 } else { 471 err = usbd_req_re_enumerate(child, NULL); 472 } 473 if (err == 0) 474 err = usbd_set_config_index(child, 0); 475 if (err == 0) { 476 err = usb_probe_and_attach(child, 477 USB_IFACE_INDEX_ANY); 478 } 479 child->re_enumerate_wait = USB_RE_ENUM_DONE; 480 break; 481 482 case USB_RE_ENUM_PWR_OFF: 483 /* get the device unconfigured */ 484 err = usbd_set_config_index(child, 485 USB_UNCONFIG_INDEX); 486 if (err) { 487 DPRINTFN(0, "Could not unconfigure " 488 "device (ignored)\n"); 489 } 490 if (child->parent_hub == NULL) { 491 /* the root HUB cannot be re-enumerated */ 492 DPRINTFN(6, "cannot set port feature\n"); 493 err = 0; 494 } else { 495 /* clear port enable */ 496 err = usbd_req_clear_port_feature(child->parent_hub, 497 NULL, child->port_no, UHF_PORT_ENABLE); 498 if (err) { 499 DPRINTFN(0, "Could not disable port " 500 "(ignored)\n"); 501 } 502 } 503 child->re_enumerate_wait = USB_RE_ENUM_DONE; 504 break; 505 506 case USB_RE_ENUM_SET_CONFIG: 507 err = usbd_set_config_index(child, 508 child->next_config_index); 509 if (err != 0) { 510 DPRINTF("Configure failed: %s: Ignored.\n", 511 usbd_errstr(err)); 512 } else { 513 err = usb_probe_and_attach(child, 514 USB_IFACE_INDEX_ANY); 515 } 516 child->re_enumerate_wait = USB_RE_ENUM_DONE; 517 break; 518 519 default: 520 child->re_enumerate_wait = USB_RE_ENUM_DONE; 521 break; 522 } 523 if (do_unlock) 524 usbd_enum_unlock(child); 525 } 526 527 /*------------------------------------------------------------------------* 528 * uhub_explore_sub - subroutine 529 * 530 * Return values: 531 * 0: Success 532 * Else: A control transaction failed 533 *------------------------------------------------------------------------*/ 534 static usb_error_t 535 uhub_explore_sub(struct uhub_softc *sc, struct usb_port *up) 536 { 537 struct usb_bus *bus; 538 struct usb_device *child; 539 uint8_t refcount; 540 usb_error_t err; 541 542 bus = sc->sc_udev->bus; 543 err = 0; 544 545 /* get driver added refcount from USB bus */ 546 refcount = bus->driver_added_refcount; 547 548 /* get device assosiated with the given port */ 549 child = usb_bus_port_get_device(bus, up); 550 if (child == NULL) { 551 /* nothing to do */ 552 goto done; 553 } 554 555 uhub_explore_handle_re_enumerate(child); 556 557 /* check if probe and attach should be done */ 558 559 if (child->driver_added_refcount != refcount) { 560 child->driver_added_refcount = refcount; 561 err = usb_probe_and_attach(child, 562 USB_IFACE_INDEX_ANY); 563 if (err) { 564 goto done; 565 } 566 } 567 /* start control transfer, if device mode */ 568 569 if (child->flags.usb_mode == USB_MODE_DEVICE) 570 usbd_ctrl_transfer_setup(child); 571 572 /* if a HUB becomes present, do a recursive HUB explore */ 573 574 if (child->hub) 575 err = (child->hub->explore) (child); 576 577 done: 578 return (err); 579 } 580 581 /*------------------------------------------------------------------------* 582 * uhub_read_port_status - factored out code 583 *------------------------------------------------------------------------*/ 584 static usb_error_t 585 uhub_read_port_status(struct uhub_softc *sc, uint8_t portno) 586 { 587 struct usb_port_status ps; 588 usb_error_t err; 589 590 err = usbd_req_get_port_status( 591 sc->sc_udev, NULL, &ps, portno); 592 593 /* update status regardless of error */ 594 595 sc->sc_st.port_status = UGETW(ps.wPortStatus); 596 sc->sc_st.port_change = UGETW(ps.wPortChange); 597 598 /* debugging print */ 599 600 DPRINTFN(4, "port %d, wPortStatus=0x%04x, " 601 "wPortChange=0x%04x, err=%s\n", 602 portno, sc->sc_st.port_status, 603 sc->sc_st.port_change, usbd_errstr(err)); 604 return (err); 605 } 606 607 /*------------------------------------------------------------------------* 608 * uhub_reattach_port 609 * 610 * Returns: 611 * 0: Success 612 * Else: A control transaction failed 613 *------------------------------------------------------------------------*/ 614 static usb_error_t 615 uhub_reattach_port(struct uhub_softc *sc, uint8_t portno) 616 { 617 struct usb_device *child; 618 struct usb_device *udev; 619 enum usb_dev_speed speed; 620 enum usb_hc_mode mode; 621 usb_error_t err; 622 uint16_t power_mask; 623 uint8_t timeout; 624 625 DPRINTF("reattaching port %d\n", portno); 626 627 timeout = 0; 628 udev = sc->sc_udev; 629 child = usb_bus_port_get_device(udev->bus, 630 udev->hub->ports + portno - 1); 631 632 repeat: 633 634 /* first clear the port connection change bit */ 635 636 err = usbd_req_clear_port_feature(udev, NULL, 637 portno, UHF_C_PORT_CONNECTION); 638 639 if (err) 640 goto error; 641 642 /* check if there is a child */ 643 644 if (child != NULL) { 645 /* 646 * Free USB device and all subdevices, if any. 647 */ 648 usb_free_device(child, 0); 649 child = NULL; 650 } 651 /* get fresh status */ 652 653 err = uhub_read_port_status(sc, portno); 654 if (err) 655 goto error; 656 657 #if USB_HAVE_DISABLE_ENUM 658 /* check if we should skip enumeration from this USB HUB */ 659 if (usb_disable_enumeration != 0 || 660 sc->sc_disable_enumeration != 0) { 661 DPRINTF("Enumeration is disabled!\n"); 662 goto error; 663 } 664 #endif 665 /* check if nothing is connected to the port */ 666 667 if (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS)) 668 goto error; 669 670 /* check if there is no power on the port and print a warning */ 671 672 switch (udev->speed) { 673 case USB_SPEED_HIGH: 674 case USB_SPEED_FULL: 675 case USB_SPEED_LOW: 676 power_mask = UPS_PORT_POWER; 677 break; 678 case USB_SPEED_SUPER: 679 if (udev->parent_hub == NULL) 680 power_mask = UPS_PORT_POWER; 681 else 682 power_mask = UPS_PORT_POWER_SS; 683 break; 684 default: 685 power_mask = 0; 686 break; 687 } 688 if (!(sc->sc_st.port_status & power_mask)) { 689 DPRINTF("WARNING: strange, connected port %d " 690 "has no power\n", portno); 691 } 692 693 /* check if the device is in Host Mode */ 694 695 if (!(sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)) { 696 697 DPRINTF("Port %d is in Host Mode\n", portno); 698 699 if (sc->sc_st.port_status & UPS_SUSPEND) { 700 /* 701 * NOTE: Should not get here in SuperSpeed 702 * mode, because the HUB should report this 703 * bit as zero. 704 */ 705 DPRINTF("Port %d was still " 706 "suspended, clearing.\n", portno); 707 err = usbd_req_clear_port_feature(udev, 708 NULL, portno, UHF_PORT_SUSPEND); 709 } 710 711 /* USB Host Mode */ 712 713 /* wait for maximum device power up time */ 714 715 usb_pause_mtx(NULL, 716 USB_MS_TO_TICKS(usb_port_powerup_delay)); 717 718 /* reset port, which implies enabling it */ 719 720 err = usbd_req_reset_port(udev, NULL, portno); 721 722 if (err) { 723 DPRINTFN(0, "port %d reset " 724 "failed, error=%s\n", 725 portno, usbd_errstr(err)); 726 goto error; 727 } 728 /* get port status again, it might have changed during reset */ 729 730 err = uhub_read_port_status(sc, portno); 731 if (err) { 732 goto error; 733 } 734 /* check if something changed during port reset */ 735 736 if ((sc->sc_st.port_change & UPS_C_CONNECT_STATUS) || 737 (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))) { 738 if (timeout) { 739 DPRINTFN(0, "giving up port reset " 740 "- device vanished\n"); 741 goto error; 742 } 743 timeout = 1; 744 goto repeat; 745 } 746 } else { 747 DPRINTF("Port %d is in Device Mode\n", portno); 748 } 749 750 /* 751 * Figure out the device speed 752 */ 753 switch (udev->speed) { 754 case USB_SPEED_HIGH: 755 if (sc->sc_st.port_status & UPS_HIGH_SPEED) 756 speed = USB_SPEED_HIGH; 757 else if (sc->sc_st.port_status & UPS_LOW_SPEED) 758 speed = USB_SPEED_LOW; 759 else 760 speed = USB_SPEED_FULL; 761 break; 762 case USB_SPEED_FULL: 763 if (sc->sc_st.port_status & UPS_LOW_SPEED) 764 speed = USB_SPEED_LOW; 765 else 766 speed = USB_SPEED_FULL; 767 break; 768 case USB_SPEED_LOW: 769 speed = USB_SPEED_LOW; 770 break; 771 case USB_SPEED_SUPER: 772 if (udev->parent_hub == NULL) { 773 /* Root HUB - special case */ 774 switch (sc->sc_st.port_status & UPS_OTHER_SPEED) { 775 case 0: 776 speed = USB_SPEED_FULL; 777 break; 778 case UPS_LOW_SPEED: 779 speed = USB_SPEED_LOW; 780 break; 781 case UPS_HIGH_SPEED: 782 speed = USB_SPEED_HIGH; 783 break; 784 default: 785 speed = USB_SPEED_SUPER; 786 break; 787 } 788 } else { 789 speed = USB_SPEED_SUPER; 790 } 791 break; 792 default: 793 /* same speed like parent */ 794 speed = udev->speed; 795 break; 796 } 797 if (speed == USB_SPEED_SUPER) { 798 err = usbd_req_set_hub_u1_timeout(udev, NULL, 799 portno, 128 - (2 * udev->depth)); 800 if (err) { 801 DPRINTFN(0, "port %d U1 timeout " 802 "failed, error=%s\n", 803 portno, usbd_errstr(err)); 804 } 805 err = usbd_req_set_hub_u2_timeout(udev, NULL, 806 portno, 128 - (2 * udev->depth)); 807 if (err) { 808 DPRINTFN(0, "port %d U2 timeout " 809 "failed, error=%s\n", 810 portno, usbd_errstr(err)); 811 } 812 } 813 814 /* 815 * Figure out the device mode 816 * 817 * NOTE: This part is currently FreeBSD specific. 818 */ 819 if (udev->parent_hub != NULL) { 820 /* inherit mode from the parent HUB */ 821 mode = udev->parent_hub->flags.usb_mode; 822 } else if (sc->sc_st.port_status & UPS_PORT_MODE_DEVICE) 823 mode = USB_MODE_DEVICE; 824 else 825 mode = USB_MODE_HOST; 826 827 /* need to create a new child */ 828 child = usb_alloc_device(sc->sc_dev, udev->bus, udev, 829 udev->depth + 1, portno - 1, portno, speed, mode); 830 if (child == NULL) { 831 DPRINTFN(0, "could not allocate new device\n"); 832 goto error; 833 } 834 return (0); /* success */ 835 836 error: 837 if (child != NULL) { 838 /* 839 * Free USB device and all subdevices, if any. 840 */ 841 usb_free_device(child, 0); 842 child = NULL; 843 } 844 if (err == 0) { 845 if (sc->sc_st.port_status & UPS_PORT_ENABLED) { 846 err = usbd_req_clear_port_feature( 847 sc->sc_udev, NULL, 848 portno, UHF_PORT_ENABLE); 849 } 850 } 851 if (err) { 852 DPRINTFN(0, "device problem (%s), " 853 "disabling port %d\n", usbd_errstr(err), portno); 854 } 855 return (err); 856 } 857 858 /*------------------------------------------------------------------------* 859 * usb_device_20_compatible 860 * 861 * Returns: 862 * 0: HUB does not support suspend and resume 863 * Else: HUB supports suspend and resume 864 *------------------------------------------------------------------------*/ 865 static uint8_t 866 usb_device_20_compatible(struct usb_device *udev) 867 { 868 if (udev == NULL) 869 return (0); 870 switch (udev->speed) { 871 case USB_SPEED_LOW: 872 case USB_SPEED_FULL: 873 case USB_SPEED_HIGH: 874 return (1); 875 default: 876 return (0); 877 } 878 } 879 880 /*------------------------------------------------------------------------* 881 * uhub_suspend_resume_port 882 * 883 * Returns: 884 * 0: Success 885 * Else: A control transaction failed 886 *------------------------------------------------------------------------*/ 887 static usb_error_t 888 uhub_suspend_resume_port(struct uhub_softc *sc, uint8_t portno) 889 { 890 struct usb_device *child; 891 struct usb_device *udev; 892 uint8_t is_suspend; 893 usb_error_t err; 894 895 DPRINTF("port %d\n", portno); 896 897 udev = sc->sc_udev; 898 child = usb_bus_port_get_device(udev->bus, 899 udev->hub->ports + portno - 1); 900 901 /* first clear the port suspend change bit */ 902 903 if (usb_device_20_compatible(udev)) { 904 err = usbd_req_clear_port_feature(udev, NULL, 905 portno, UHF_C_PORT_SUSPEND); 906 } else { 907 err = usbd_req_clear_port_feature(udev, NULL, 908 portno, UHF_C_PORT_LINK_STATE); 909 } 910 911 if (err) { 912 DPRINTF("clearing suspend failed.\n"); 913 goto done; 914 } 915 /* get fresh status */ 916 917 err = uhub_read_port_status(sc, portno); 918 if (err) { 919 DPRINTF("reading port status failed.\n"); 920 goto done; 921 } 922 /* convert current state */ 923 924 if (usb_device_20_compatible(udev)) { 925 if (sc->sc_st.port_status & UPS_SUSPEND) { 926 is_suspend = 1; 927 } else { 928 is_suspend = 0; 929 } 930 } else { 931 switch (UPS_PORT_LINK_STATE_GET(sc->sc_st.port_status)) { 932 case UPS_PORT_LS_U3: 933 is_suspend = 1; 934 break; 935 case UPS_PORT_LS_SS_INA: 936 usbd_req_warm_reset_port(udev, NULL, portno); 937 is_suspend = 0; 938 break; 939 default: 940 is_suspend = 0; 941 break; 942 } 943 } 944 945 DPRINTF("suspended=%u\n", is_suspend); 946 947 /* do the suspend or resume */ 948 949 if (child) { 950 /* 951 * This code handle two cases: 1) Host Mode - we can only 952 * receive resume here 2) Device Mode - we can receive 953 * suspend and resume here 954 */ 955 if (is_suspend == 0) 956 usb_dev_resume_peer(child); 957 else if (child->flags.usb_mode == USB_MODE_DEVICE) 958 usb_dev_suspend_peer(child); 959 } 960 done: 961 return (err); 962 } 963 964 /*------------------------------------------------------------------------* 965 * uhub_root_interrupt 966 * 967 * This function is called when a Root HUB interrupt has 968 * happened. "ptr" and "len" makes up the Root HUB interrupt 969 * packet. This function is called having the "bus_mtx" locked. 970 *------------------------------------------------------------------------*/ 971 void 972 uhub_root_intr(struct usb_bus *bus, const uint8_t *ptr, uint8_t len) 973 { 974 USB_BUS_LOCK_ASSERT(bus, MA_OWNED); 975 976 usb_needs_explore(bus, 0); 977 } 978 979 static uint8_t 980 uhub_is_too_deep(struct usb_device *udev) 981 { 982 switch (udev->speed) { 983 case USB_SPEED_FULL: 984 case USB_SPEED_LOW: 985 case USB_SPEED_HIGH: 986 if (udev->depth > USB_HUB_MAX_DEPTH) 987 return (1); 988 break; 989 case USB_SPEED_SUPER: 990 if (udev->depth > USB_SS_HUB_DEPTH_MAX) 991 return (1); 992 break; 993 default: 994 break; 995 } 996 return (0); 997 } 998 999 /*------------------------------------------------------------------------* 1000 * uhub_explore 1001 * 1002 * Returns: 1003 * 0: Success 1004 * Else: Failure 1005 *------------------------------------------------------------------------*/ 1006 static usb_error_t 1007 uhub_explore(struct usb_device *udev) 1008 { 1009 struct usb_hub *hub; 1010 struct uhub_softc *sc; 1011 struct usb_port *up; 1012 usb_error_t err; 1013 uint8_t portno; 1014 uint8_t x; 1015 uint8_t do_unlock; 1016 1017 hub = udev->hub; 1018 sc = hub->hubsoftc; 1019 1020 DPRINTFN(11, "udev=%p addr=%d\n", udev, udev->address); 1021 1022 /* ignore devices that are too deep */ 1023 if (uhub_is_too_deep(udev)) 1024 return (USB_ERR_TOO_DEEP); 1025 1026 /* check if device is suspended */ 1027 if (udev->flags.self_suspended) { 1028 /* need to wait until the child signals resume */ 1029 DPRINTF("Device is suspended!\n"); 1030 return (0); 1031 } 1032 1033 /* 1034 * Make sure we don't race against user-space applications 1035 * like LibUSB: 1036 */ 1037 do_unlock = usbd_enum_lock(udev); 1038 1039 for (x = 0; x != hub->nports; x++) { 1040 up = hub->ports + x; 1041 portno = x + 1; 1042 1043 err = uhub_read_port_status(sc, portno); 1044 if (err) { 1045 /* most likely the HUB is gone */ 1046 break; 1047 } 1048 if (sc->sc_st.port_change & UPS_C_OVERCURRENT_INDICATOR) { 1049 DPRINTF("Overcurrent on port %u.\n", portno); 1050 err = usbd_req_clear_port_feature( 1051 udev, NULL, portno, UHF_C_PORT_OVER_CURRENT); 1052 if (err) { 1053 /* most likely the HUB is gone */ 1054 break; 1055 } 1056 } 1057 if (!(sc->sc_flags & UHUB_FLAG_DID_EXPLORE)) { 1058 /* 1059 * Fake a connect status change so that the 1060 * status gets checked initially! 1061 */ 1062 sc->sc_st.port_change |= 1063 UPS_C_CONNECT_STATUS; 1064 } 1065 if (sc->sc_st.port_change & UPS_C_PORT_ENABLED) { 1066 err = usbd_req_clear_port_feature( 1067 udev, NULL, portno, UHF_C_PORT_ENABLE); 1068 if (err) { 1069 /* most likely the HUB is gone */ 1070 break; 1071 } 1072 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) { 1073 /* 1074 * Ignore the port error if the device 1075 * has vanished ! 1076 */ 1077 } else if (sc->sc_st.port_status & UPS_PORT_ENABLED) { 1078 DPRINTFN(0, "illegal enable change, " 1079 "port %d\n", portno); 1080 } else { 1081 1082 if (up->restartcnt == USB_RESTART_MAX) { 1083 /* XXX could try another speed ? */ 1084 DPRINTFN(0, "port error, giving up " 1085 "port %d\n", portno); 1086 } else { 1087 sc->sc_st.port_change |= 1088 UPS_C_CONNECT_STATUS; 1089 up->restartcnt++; 1090 } 1091 } 1092 } 1093 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) { 1094 err = uhub_reattach_port(sc, portno); 1095 if (err) { 1096 /* most likely the HUB is gone */ 1097 break; 1098 } 1099 } 1100 if (sc->sc_st.port_change & (UPS_C_SUSPEND | 1101 UPS_C_PORT_LINK_STATE)) { 1102 err = uhub_suspend_resume_port(sc, portno); 1103 if (err) { 1104 /* most likely the HUB is gone */ 1105 break; 1106 } 1107 } 1108 err = uhub_explore_sub(sc, up); 1109 if (err) { 1110 /* no device(s) present */ 1111 continue; 1112 } 1113 /* explore succeeded - reset restart counter */ 1114 up->restartcnt = 0; 1115 } 1116 1117 if (do_unlock) 1118 usbd_enum_unlock(udev); 1119 1120 /* initial status checked */ 1121 sc->sc_flags |= UHUB_FLAG_DID_EXPLORE; 1122 1123 /* return success */ 1124 return (USB_ERR_NORMAL_COMPLETION); 1125 } 1126 1127 static int 1128 uhub_probe(device_t dev) 1129 { 1130 struct usb_attach_arg *uaa = device_get_ivars(dev); 1131 1132 if (uaa->usb_mode != USB_MODE_HOST) 1133 return (ENXIO); 1134 1135 /* 1136 * The subclass for USB HUBs is currently ignored because it 1137 * is 0 for some and 1 for others. 1138 */ 1139 if (uaa->info.bConfigIndex == 0 && 1140 uaa->info.bDeviceClass == UDCLASS_HUB) 1141 return (0); 1142 1143 return (ENXIO); 1144 } 1145 1146 /* NOTE: The information returned by this function can be wrong. */ 1147 usb_error_t 1148 uhub_query_info(struct usb_device *udev, uint8_t *pnports, uint8_t *ptt) 1149 { 1150 struct usb_hub_descriptor hubdesc20; 1151 struct usb_hub_ss_descriptor hubdesc30; 1152 usb_error_t err; 1153 uint8_t nports; 1154 uint8_t tt; 1155 1156 if (udev->ddesc.bDeviceClass != UDCLASS_HUB) 1157 return (USB_ERR_INVAL); 1158 1159 nports = 0; 1160 tt = 0; 1161 1162 switch (udev->speed) { 1163 case USB_SPEED_LOW: 1164 case USB_SPEED_FULL: 1165 case USB_SPEED_HIGH: 1166 /* assuming that there is one port */ 1167 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1); 1168 if (err) { 1169 DPRINTFN(0, "getting USB 2.0 HUB descriptor failed," 1170 "error=%s\n", usbd_errstr(err)); 1171 break; 1172 } 1173 nports = hubdesc20.bNbrPorts; 1174 if (nports > 127) 1175 nports = 127; 1176 1177 if (udev->speed == USB_SPEED_HIGH) 1178 tt = (UGETW(hubdesc20.wHubCharacteristics) >> 5) & 3; 1179 break; 1180 1181 case USB_SPEED_SUPER: 1182 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1); 1183 if (err) { 1184 DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed," 1185 "error=%s\n", usbd_errstr(err)); 1186 break; 1187 } 1188 nports = hubdesc30.bNbrPorts; 1189 if (nports > 16) 1190 nports = 16; 1191 break; 1192 1193 default: 1194 err = USB_ERR_INVAL; 1195 break; 1196 } 1197 1198 if (pnports != NULL) 1199 *pnports = nports; 1200 1201 if (ptt != NULL) 1202 *ptt = tt; 1203 1204 return (err); 1205 } 1206 1207 static int 1208 uhub_attach(device_t dev) 1209 { 1210 struct uhub_softc *sc = device_get_softc(dev); 1211 struct usb_attach_arg *uaa = device_get_ivars(dev); 1212 struct usb_device *udev = uaa->device; 1213 struct usb_device *parent_hub = udev->parent_hub; 1214 struct usb_hub *hub; 1215 struct usb_hub_descriptor hubdesc20; 1216 struct usb_hub_ss_descriptor hubdesc30; 1217 #if USB_HAVE_DISABLE_ENUM 1218 struct sysctl_ctx_list *sysctl_ctx; 1219 struct sysctl_oid *sysctl_tree; 1220 #endif 1221 uint16_t pwrdly; 1222 uint16_t nports; 1223 uint8_t x; 1224 uint8_t portno; 1225 uint8_t removable; 1226 uint8_t iface_index; 1227 usb_error_t err; 1228 1229 sc->sc_udev = udev; 1230 sc->sc_dev = dev; 1231 1232 mtx_init(&sc->sc_mtx, "USB HUB mutex", NULL, MTX_DEF); 1233 1234 device_set_usb_desc(dev); 1235 1236 DPRINTFN(2, "depth=%d selfpowered=%d, parent=%p, " 1237 "parent->selfpowered=%d\n", 1238 udev->depth, 1239 udev->flags.self_powered, 1240 parent_hub, 1241 parent_hub ? 1242 parent_hub->flags.self_powered : 0); 1243 1244 if (uhub_is_too_deep(udev)) { 1245 DPRINTFN(0, "HUB at depth %d, " 1246 "exceeds maximum. HUB ignored\n", (int)udev->depth); 1247 goto error; 1248 } 1249 1250 if (!udev->flags.self_powered && parent_hub && 1251 !parent_hub->flags.self_powered) { 1252 DPRINTFN(0, "Bus powered HUB connected to " 1253 "bus powered HUB. HUB ignored\n"); 1254 goto error; 1255 } 1256 1257 if (UHUB_IS_MULTI_TT(sc)) { 1258 err = usbd_set_alt_interface_index(udev, 0, 1); 1259 if (err) { 1260 device_printf(dev, "MTT could not be enabled\n"); 1261 goto error; 1262 } 1263 device_printf(dev, "MTT enabled\n"); 1264 } 1265 1266 /* get HUB descriptor */ 1267 1268 DPRINTFN(2, "Getting HUB descriptor\n"); 1269 1270 switch (udev->speed) { 1271 case USB_SPEED_LOW: 1272 case USB_SPEED_FULL: 1273 case USB_SPEED_HIGH: 1274 /* assuming that there is one port */ 1275 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1); 1276 if (err) { 1277 DPRINTFN(0, "getting USB 2.0 HUB descriptor failed," 1278 "error=%s\n", usbd_errstr(err)); 1279 goto error; 1280 } 1281 /* get number of ports */ 1282 nports = hubdesc20.bNbrPorts; 1283 1284 /* get power delay */ 1285 pwrdly = ((hubdesc20.bPwrOn2PwrGood * UHD_PWRON_FACTOR) + 1286 usb_extra_power_up_time); 1287 1288 /* get complete HUB descriptor */ 1289 if (nports >= 8) { 1290 /* check number of ports */ 1291 if (nports > 127) { 1292 DPRINTFN(0, "Invalid number of USB 2.0 ports," 1293 "error=%s\n", usbd_errstr(err)); 1294 goto error; 1295 } 1296 /* get complete HUB descriptor */ 1297 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, nports); 1298 1299 if (err) { 1300 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed," 1301 "error=%s\n", usbd_errstr(err)); 1302 goto error; 1303 } 1304 if (hubdesc20.bNbrPorts != nports) { 1305 DPRINTFN(0, "Number of ports changed\n"); 1306 goto error; 1307 } 1308 } 1309 break; 1310 case USB_SPEED_SUPER: 1311 if (udev->parent_hub != NULL) { 1312 err = usbd_req_set_hub_depth(udev, NULL, 1313 udev->depth - 1); 1314 if (err) { 1315 DPRINTFN(0, "Setting USB 3.0 HUB depth failed," 1316 "error=%s\n", usbd_errstr(err)); 1317 goto error; 1318 } 1319 } 1320 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1); 1321 if (err) { 1322 DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed," 1323 "error=%s\n", usbd_errstr(err)); 1324 goto error; 1325 } 1326 /* get number of ports */ 1327 nports = hubdesc30.bNbrPorts; 1328 1329 /* get power delay */ 1330 pwrdly = ((hubdesc30.bPwrOn2PwrGood * UHD_PWRON_FACTOR) + 1331 usb_extra_power_up_time); 1332 1333 /* get complete HUB descriptor */ 1334 if (nports >= 8) { 1335 /* check number of ports */ 1336 if (nports > ((udev->parent_hub != NULL) ? 15 : 127)) { 1337 DPRINTFN(0, "Invalid number of USB 3.0 ports," 1338 "error=%s\n", usbd_errstr(err)); 1339 goto error; 1340 } 1341 /* get complete HUB descriptor */ 1342 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, nports); 1343 1344 if (err) { 1345 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed," 1346 "error=%s\n", usbd_errstr(err)); 1347 goto error; 1348 } 1349 if (hubdesc30.bNbrPorts != nports) { 1350 DPRINTFN(0, "Number of ports changed\n"); 1351 goto error; 1352 } 1353 } 1354 break; 1355 default: 1356 DPRINTF("Assuming HUB has only one port\n"); 1357 /* default number of ports */ 1358 nports = 1; 1359 /* default power delay */ 1360 pwrdly = ((10 * UHD_PWRON_FACTOR) + usb_extra_power_up_time); 1361 break; 1362 } 1363 if (nports == 0) { 1364 DPRINTFN(0, "portless HUB\n"); 1365 goto error; 1366 } 1367 if (nports > USB_MAX_PORTS) { 1368 DPRINTF("Port limit exceeded\n"); 1369 goto error; 1370 } 1371 #if (USB_HAVE_FIXED_PORT == 0) 1372 hub = malloc(sizeof(hub[0]) + (sizeof(hub->ports[0]) * nports), 1373 M_USBDEV, M_WAITOK | M_ZERO); 1374 1375 if (hub == NULL) 1376 goto error; 1377 #else 1378 hub = &sc->sc_hub; 1379 #endif 1380 udev->hub = hub; 1381 1382 /* initialize HUB structure */ 1383 hub->hubsoftc = sc; 1384 hub->explore = &uhub_explore; 1385 hub->nports = nports; 1386 hub->hubudev = udev; 1387 #if USB_HAVE_TT_SUPPORT 1388 hub->tt_msg[0].hdr.pm_callback = &uhub_reset_tt_proc; 1389 hub->tt_msg[0].udev = udev; 1390 hub->tt_msg[1].hdr.pm_callback = &uhub_reset_tt_proc; 1391 hub->tt_msg[1].udev = udev; 1392 #endif 1393 /* if self powered hub, give ports maximum current */ 1394 if (udev->flags.self_powered) { 1395 hub->portpower = USB_MAX_POWER; 1396 } else { 1397 hub->portpower = USB_MIN_POWER; 1398 } 1399 1400 /* set up interrupt pipe */ 1401 iface_index = 0; 1402 if (udev->parent_hub == NULL) { 1403 /* root HUB is special */ 1404 err = 0; 1405 } else { 1406 /* normal HUB */ 1407 err = usbd_transfer_setup(udev, &iface_index, sc->sc_xfer, 1408 uhub_config, UHUB_N_TRANSFER, sc, &sc->sc_mtx); 1409 } 1410 if (err) { 1411 DPRINTFN(0, "cannot setup interrupt transfer, " 1412 "errstr=%s\n", usbd_errstr(err)); 1413 goto error; 1414 } 1415 /* wait with power off for a while */ 1416 usb_pause_mtx(NULL, USB_MS_TO_TICKS(USB_POWER_DOWN_TIME)); 1417 1418 #if USB_HAVE_DISABLE_ENUM 1419 /* Add device sysctls */ 1420 1421 sysctl_ctx = device_get_sysctl_ctx(dev); 1422 sysctl_tree = device_get_sysctl_tree(dev); 1423 1424 if (sysctl_ctx != NULL && sysctl_tree != NULL) { 1425 (void) SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), 1426 OID_AUTO, "disable_enumeration", CTLFLAG_RWTUN, 1427 &sc->sc_disable_enumeration, 0, 1428 "Set to disable enumeration on this USB HUB."); 1429 1430 (void) SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), 1431 OID_AUTO, "disable_port_power", CTLFLAG_RWTUN, 1432 &sc->sc_disable_port_power, 0, 1433 "Set to disable USB port power on this USB HUB."); 1434 } 1435 #endif 1436 /* 1437 * To have the best chance of success we do things in the exact same 1438 * order as Windoze98. This should not be necessary, but some 1439 * devices do not follow the USB specs to the letter. 1440 * 1441 * These are the events on the bus when a hub is attached: 1442 * Get device and config descriptors (see attach code) 1443 * Get hub descriptor (see above) 1444 * For all ports 1445 * turn on power 1446 * wait for power to become stable 1447 * (all below happens in explore code) 1448 * For all ports 1449 * clear C_PORT_CONNECTION 1450 * For all ports 1451 * get port status 1452 * if device connected 1453 * wait 100 ms 1454 * turn on reset 1455 * wait 1456 * clear C_PORT_RESET 1457 * get port status 1458 * proceed with device attachment 1459 */ 1460 1461 /* XXX should check for none, individual, or ganged power? */ 1462 1463 removable = 0; 1464 1465 for (x = 0; x != nports; x++) { 1466 /* set up data structures */ 1467 struct usb_port *up = hub->ports + x; 1468 1469 up->device_index = 0; 1470 up->restartcnt = 0; 1471 portno = x + 1; 1472 1473 /* check if port is removable */ 1474 switch (udev->speed) { 1475 case USB_SPEED_LOW: 1476 case USB_SPEED_FULL: 1477 case USB_SPEED_HIGH: 1478 if (!UHD_NOT_REMOV(&hubdesc20, portno)) 1479 removable++; 1480 break; 1481 case USB_SPEED_SUPER: 1482 if (!UHD_NOT_REMOV(&hubdesc30, portno)) 1483 removable++; 1484 break; 1485 default: 1486 DPRINTF("Assuming removable port\n"); 1487 removable++; 1488 break; 1489 } 1490 if (err == 0) { 1491 #if USB_HAVE_DISABLE_ENUM 1492 /* check if we should disable USB port power or not */ 1493 if (usb_disable_port_power != 0 || 1494 sc->sc_disable_port_power != 0) { 1495 /* turn the power off */ 1496 DPRINTFN(2, "Turning port %d power off\n", portno); 1497 err = usbd_req_clear_port_feature(udev, NULL, 1498 portno, UHF_PORT_POWER); 1499 } else { 1500 #endif 1501 /* turn the power on */ 1502 DPRINTFN(2, "Turning port %d power on\n", portno); 1503 err = usbd_req_set_port_feature(udev, NULL, 1504 portno, UHF_PORT_POWER); 1505 #if USB_HAVE_DISABLE_ENUM 1506 } 1507 #endif 1508 } 1509 if (err != 0) { 1510 DPRINTFN(0, "port %d power on or off failed, %s\n", 1511 portno, usbd_errstr(err)); 1512 } 1513 DPRINTF("turn on port %d power\n", 1514 portno); 1515 1516 /* wait for stable power */ 1517 usb_pause_mtx(NULL, USB_MS_TO_TICKS(pwrdly)); 1518 } 1519 1520 device_printf(dev, "%d port%s with %d " 1521 "removable, %s powered\n", nports, (nports != 1) ? "s" : "", 1522 removable, udev->flags.self_powered ? "self" : "bus"); 1523 1524 /* Start the interrupt endpoint, if any */ 1525 1526 USB_MTX_LOCK(&sc->sc_mtx); 1527 usbd_transfer_start(sc->sc_xfer[UHUB_INTR_TRANSFER]); 1528 USB_MTX_UNLOCK(&sc->sc_mtx); 1529 1530 /* Enable automatic power save on all USB HUBs */ 1531 1532 usbd_set_power_mode(udev, USB_POWER_MODE_SAVE); 1533 1534 return (0); 1535 1536 error: 1537 usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER); 1538 1539 #if (USB_HAVE_FIXED_PORT == 0) 1540 free(udev->hub, M_USBDEV); 1541 #endif 1542 udev->hub = NULL; 1543 1544 mtx_destroy(&sc->sc_mtx); 1545 1546 return (ENXIO); 1547 } 1548 1549 /* 1550 * Called from process context when the hub is gone. 1551 * Detach all devices on active ports. 1552 */ 1553 static int 1554 uhub_detach(device_t dev) 1555 { 1556 struct uhub_softc *sc = device_get_softc(dev); 1557 struct usb_hub *hub = sc->sc_udev->hub; 1558 struct usb_bus *bus = sc->sc_udev->bus; 1559 struct usb_device *child; 1560 uint8_t x; 1561 1562 if (hub == NULL) /* must be partially working */ 1563 return (0); 1564 1565 /* Make sure interrupt transfer is gone. */ 1566 usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER); 1567 1568 /* Detach all ports */ 1569 for (x = 0; x != hub->nports; x++) { 1570 1571 child = usb_bus_port_get_device(bus, hub->ports + x); 1572 1573 if (child == NULL) { 1574 continue; 1575 } 1576 1577 /* 1578 * Free USB device and all subdevices, if any. 1579 */ 1580 usb_free_device(child, 0); 1581 } 1582 1583 #if USB_HAVE_TT_SUPPORT 1584 /* Make sure our TT messages are not queued anywhere */ 1585 USB_BUS_LOCK(bus); 1586 usb_proc_mwait(USB_BUS_TT_PROC(bus), 1587 &hub->tt_msg[0], &hub->tt_msg[1]); 1588 USB_BUS_UNLOCK(bus); 1589 #endif 1590 1591 #if (USB_HAVE_FIXED_PORT == 0) 1592 free(hub, M_USBDEV); 1593 #endif 1594 sc->sc_udev->hub = NULL; 1595 1596 mtx_destroy(&sc->sc_mtx); 1597 1598 return (0); 1599 } 1600 1601 static int 1602 uhub_suspend(device_t dev) 1603 { 1604 DPRINTF("\n"); 1605 /* Sub-devices are not suspended here! */ 1606 return (0); 1607 } 1608 1609 static int 1610 uhub_resume(device_t dev) 1611 { 1612 DPRINTF("\n"); 1613 /* Sub-devices are not resumed here! */ 1614 return (0); 1615 } 1616 1617 static void 1618 uhub_driver_added(device_t dev, driver_t *driver) 1619 { 1620 usb_needs_explore_all(); 1621 } 1622 1623 struct hub_result { 1624 struct usb_device *udev; 1625 uint8_t portno; 1626 uint8_t iface_index; 1627 }; 1628 1629 static void 1630 uhub_find_iface_index(struct usb_hub *hub, device_t child, 1631 struct hub_result *res) 1632 { 1633 struct usb_interface *iface; 1634 struct usb_device *udev; 1635 uint8_t nports; 1636 uint8_t x; 1637 uint8_t i; 1638 1639 nports = hub->nports; 1640 for (x = 0; x != nports; x++) { 1641 udev = usb_bus_port_get_device(hub->hubudev->bus, 1642 hub->ports + x); 1643 if (!udev) { 1644 continue; 1645 } 1646 for (i = 0; i != USB_IFACE_MAX; i++) { 1647 iface = usbd_get_iface(udev, i); 1648 if (iface && 1649 (iface->subdev == child)) { 1650 res->iface_index = i; 1651 res->udev = udev; 1652 res->portno = x + 1; 1653 return; 1654 } 1655 } 1656 } 1657 res->iface_index = 0; 1658 res->udev = NULL; 1659 res->portno = 0; 1660 } 1661 1662 static int 1663 uhub_child_location_string(device_t parent, device_t child, 1664 char *buf, size_t buflen) 1665 { 1666 struct uhub_softc *sc; 1667 struct usb_hub *hub; 1668 struct hub_result res; 1669 1670 if (!device_is_attached(parent)) { 1671 if (buflen) 1672 buf[0] = 0; 1673 return (0); 1674 } 1675 1676 sc = device_get_softc(parent); 1677 hub = sc->sc_udev->hub; 1678 1679 mtx_lock(&Giant); 1680 uhub_find_iface_index(hub, child, &res); 1681 if (!res.udev) { 1682 DPRINTF("device not on hub\n"); 1683 if (buflen) { 1684 buf[0] = '\0'; 1685 } 1686 goto done; 1687 } 1688 snprintf(buf, buflen, "bus=%u hubaddr=%u port=%u devaddr=%u" 1689 " interface=%u" 1690 #if USB_HAVE_UGEN 1691 " ugen=%s" 1692 #endif 1693 , device_get_unit(res.udev->bus->bdev) 1694 , (res.udev->parent_hub != NULL) ? 1695 res.udev->parent_hub->device_index : 0 1696 , res.portno, res.udev->device_index, res.iface_index 1697 #if USB_HAVE_UGEN 1698 , res.udev->ugen_name 1699 #endif 1700 ); 1701 done: 1702 mtx_unlock(&Giant); 1703 1704 return (0); 1705 } 1706 1707 static int 1708 uhub_child_pnpinfo_string(device_t parent, device_t child, 1709 char *buf, size_t buflen) 1710 { 1711 struct uhub_softc *sc; 1712 struct usb_hub *hub; 1713 struct usb_interface *iface; 1714 struct hub_result res; 1715 1716 if (!device_is_attached(parent)) { 1717 if (buflen) 1718 buf[0] = 0; 1719 return (0); 1720 } 1721 1722 sc = device_get_softc(parent); 1723 hub = sc->sc_udev->hub; 1724 1725 mtx_lock(&Giant); 1726 uhub_find_iface_index(hub, child, &res); 1727 if (!res.udev) { 1728 DPRINTF("device not on hub\n"); 1729 if (buflen) { 1730 buf[0] = '\0'; 1731 } 1732 goto done; 1733 } 1734 iface = usbd_get_iface(res.udev, res.iface_index); 1735 if (iface && iface->idesc) { 1736 snprintf(buf, buflen, "vendor=0x%04x product=0x%04x " 1737 "devclass=0x%02x devsubclass=0x%02x " 1738 "devproto=0x%02x " 1739 "sernum=\"%s\" " 1740 "release=0x%04x " 1741 "mode=%s " 1742 "intclass=0x%02x intsubclass=0x%02x " 1743 "intprotocol=0x%02x" "%s%s", 1744 UGETW(res.udev->ddesc.idVendor), 1745 UGETW(res.udev->ddesc.idProduct), 1746 res.udev->ddesc.bDeviceClass, 1747 res.udev->ddesc.bDeviceSubClass, 1748 res.udev->ddesc.bDeviceProtocol, 1749 usb_get_serial(res.udev), 1750 UGETW(res.udev->ddesc.bcdDevice), 1751 (res.udev->flags.usb_mode == USB_MODE_HOST) ? "host" : "device", 1752 iface->idesc->bInterfaceClass, 1753 iface->idesc->bInterfaceSubClass, 1754 iface->idesc->bInterfaceProtocol, 1755 iface->pnpinfo ? " " : "", 1756 iface->pnpinfo ? iface->pnpinfo : ""); 1757 } else { 1758 if (buflen) { 1759 buf[0] = '\0'; 1760 } 1761 goto done; 1762 } 1763 done: 1764 mtx_unlock(&Giant); 1765 1766 return (0); 1767 } 1768 1769 /* 1770 * The USB Transaction Translator: 1771 * =============================== 1772 * 1773 * When doing LOW- and FULL-speed USB transfers across a HIGH-speed 1774 * USB HUB, bandwidth must be allocated for ISOCHRONOUS and INTERRUPT 1775 * USB transfers. To utilize bandwidth dynamically the "scatter and 1776 * gather" principle must be applied. This means that bandwidth must 1777 * be divided into equal parts of bandwidth. With regard to USB all 1778 * data is transferred in smaller packets with length 1779 * "wMaxPacketSize". The problem however is that "wMaxPacketSize" is 1780 * not a constant! 1781 * 1782 * The bandwidth scheduler which I have implemented will simply pack 1783 * the USB transfers back to back until there is no more space in the 1784 * schedule. Out of the 8 microframes which the USB 2.0 standard 1785 * provides, only 6 are available for non-HIGH-speed devices. I have 1786 * reserved the first 4 microframes for ISOCHRONOUS transfers. The 1787 * last 2 microframes I have reserved for INTERRUPT transfers. Without 1788 * this division, it is very difficult to allocate and free bandwidth 1789 * dynamically. 1790 * 1791 * NOTE about the Transaction Translator in USB HUBs: 1792 * 1793 * USB HUBs have a very simple Transaction Translator, that will 1794 * simply pipeline all the SPLIT transactions. That means that the 1795 * transactions will be executed in the order they are queued! 1796 * 1797 */ 1798 1799 /*------------------------------------------------------------------------* 1800 * usb_intr_find_best_slot 1801 * 1802 * Return value: 1803 * The best Transaction Translation slot for an interrupt endpoint. 1804 *------------------------------------------------------------------------*/ 1805 static uint8_t 1806 usb_intr_find_best_slot(usb_size_t *ptr, uint8_t start, 1807 uint8_t end, uint8_t mask) 1808 { 1809 usb_size_t min = (usb_size_t)-1; 1810 usb_size_t sum; 1811 uint8_t x; 1812 uint8_t y; 1813 uint8_t z; 1814 1815 y = 0; 1816 1817 /* find the last slot with lesser used bandwidth */ 1818 1819 for (x = start; x < end; x++) { 1820 1821 sum = 0; 1822 1823 /* compute sum of bandwidth */ 1824 for (z = x; z < end; z++) { 1825 if (mask & (1U << (z - x))) 1826 sum += ptr[z]; 1827 } 1828 1829 /* check if the current multi-slot is more optimal */ 1830 if (min >= sum) { 1831 min = sum; 1832 y = x; 1833 } 1834 1835 /* check if the mask is about to be shifted out */ 1836 if (mask & (1U << (end - 1 - x))) 1837 break; 1838 } 1839 return (y); 1840 } 1841 1842 /*------------------------------------------------------------------------* 1843 * usb_hs_bandwidth_adjust 1844 * 1845 * This function will update the bandwidth usage for the microframe 1846 * having index "slot" by "len" bytes. "len" can be negative. If the 1847 * "slot" argument is greater or equal to "USB_HS_MICRO_FRAMES_MAX" 1848 * the "slot" argument will be replaced by the slot having least used 1849 * bandwidth. The "mask" argument is used for multi-slot allocations. 1850 * 1851 * Returns: 1852 * The slot in which the bandwidth update was done: 0..7 1853 *------------------------------------------------------------------------*/ 1854 static uint8_t 1855 usb_hs_bandwidth_adjust(struct usb_device *udev, int16_t len, 1856 uint8_t slot, uint8_t mask) 1857 { 1858 struct usb_bus *bus = udev->bus; 1859 struct usb_hub *hub; 1860 enum usb_dev_speed speed; 1861 uint8_t x; 1862 1863 USB_BUS_LOCK_ASSERT(bus, MA_OWNED); 1864 1865 speed = usbd_get_speed(udev); 1866 1867 switch (speed) { 1868 case USB_SPEED_LOW: 1869 case USB_SPEED_FULL: 1870 if (speed == USB_SPEED_LOW) { 1871 len *= 8; 1872 } 1873 /* 1874 * The Host Controller Driver should have 1875 * performed checks so that the lookup 1876 * below does not result in a NULL pointer 1877 * access. 1878 */ 1879 1880 hub = udev->parent_hs_hub->hub; 1881 if (slot >= USB_HS_MICRO_FRAMES_MAX) { 1882 slot = usb_intr_find_best_slot(hub->uframe_usage, 1883 USB_FS_ISOC_UFRAME_MAX, 6, mask); 1884 } 1885 for (x = slot; x < 8; x++) { 1886 if (mask & (1U << (x - slot))) { 1887 hub->uframe_usage[x] += len; 1888 bus->uframe_usage[x] += len; 1889 } 1890 } 1891 break; 1892 default: 1893 if (slot >= USB_HS_MICRO_FRAMES_MAX) { 1894 slot = usb_intr_find_best_slot(bus->uframe_usage, 0, 1895 USB_HS_MICRO_FRAMES_MAX, mask); 1896 } 1897 for (x = slot; x < 8; x++) { 1898 if (mask & (1U << (x - slot))) { 1899 bus->uframe_usage[x] += len; 1900 } 1901 } 1902 break; 1903 } 1904 return (slot); 1905 } 1906 1907 /*------------------------------------------------------------------------* 1908 * usb_hs_bandwidth_alloc 1909 * 1910 * This function is a wrapper function for "usb_hs_bandwidth_adjust()". 1911 *------------------------------------------------------------------------*/ 1912 void 1913 usb_hs_bandwidth_alloc(struct usb_xfer *xfer) 1914 { 1915 struct usb_device *udev; 1916 uint8_t slot; 1917 uint8_t mask; 1918 uint8_t speed; 1919 1920 udev = xfer->xroot->udev; 1921 1922 if (udev->flags.usb_mode != USB_MODE_HOST) 1923 return; /* not supported */ 1924 1925 xfer->endpoint->refcount_bw++; 1926 if (xfer->endpoint->refcount_bw != 1) 1927 return; /* already allocated */ 1928 1929 speed = usbd_get_speed(udev); 1930 1931 switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) { 1932 case UE_INTERRUPT: 1933 /* allocate a microframe slot */ 1934 1935 mask = 0x01; 1936 slot = usb_hs_bandwidth_adjust(udev, 1937 xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask); 1938 1939 xfer->endpoint->usb_uframe = slot; 1940 xfer->endpoint->usb_smask = mask << slot; 1941 1942 if ((speed != USB_SPEED_FULL) && 1943 (speed != USB_SPEED_LOW)) { 1944 xfer->endpoint->usb_cmask = 0x00 ; 1945 } else { 1946 xfer->endpoint->usb_cmask = (-(0x04 << slot)) & 0xFE; 1947 } 1948 break; 1949 1950 case UE_ISOCHRONOUS: 1951 switch (usbd_xfer_get_fps_shift(xfer)) { 1952 case 0: 1953 mask = 0xFF; 1954 break; 1955 case 1: 1956 mask = 0x55; 1957 break; 1958 case 2: 1959 mask = 0x11; 1960 break; 1961 default: 1962 mask = 0x01; 1963 break; 1964 } 1965 1966 /* allocate a microframe multi-slot */ 1967 1968 slot = usb_hs_bandwidth_adjust(udev, 1969 xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask); 1970 1971 xfer->endpoint->usb_uframe = slot; 1972 xfer->endpoint->usb_cmask = 0; 1973 xfer->endpoint->usb_smask = mask << slot; 1974 break; 1975 1976 default: 1977 xfer->endpoint->usb_uframe = 0; 1978 xfer->endpoint->usb_cmask = 0; 1979 xfer->endpoint->usb_smask = 0; 1980 break; 1981 } 1982 1983 DPRINTFN(11, "slot=%d, mask=0x%02x\n", 1984 xfer->endpoint->usb_uframe, 1985 xfer->endpoint->usb_smask >> xfer->endpoint->usb_uframe); 1986 } 1987 1988 /*------------------------------------------------------------------------* 1989 * usb_hs_bandwidth_free 1990 * 1991 * This function is a wrapper function for "usb_hs_bandwidth_adjust()". 1992 *------------------------------------------------------------------------*/ 1993 void 1994 usb_hs_bandwidth_free(struct usb_xfer *xfer) 1995 { 1996 struct usb_device *udev; 1997 uint8_t slot; 1998 uint8_t mask; 1999 2000 udev = xfer->xroot->udev; 2001 2002 if (udev->flags.usb_mode != USB_MODE_HOST) 2003 return; /* not supported */ 2004 2005 xfer->endpoint->refcount_bw--; 2006 if (xfer->endpoint->refcount_bw != 0) 2007 return; /* still allocated */ 2008 2009 switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) { 2010 case UE_INTERRUPT: 2011 case UE_ISOCHRONOUS: 2012 2013 slot = xfer->endpoint->usb_uframe; 2014 mask = xfer->endpoint->usb_smask; 2015 2016 /* free microframe slot(s): */ 2017 usb_hs_bandwidth_adjust(udev, 2018 -xfer->max_frame_size, slot, mask >> slot); 2019 2020 DPRINTFN(11, "slot=%d, mask=0x%02x\n", 2021 slot, mask >> slot); 2022 2023 xfer->endpoint->usb_uframe = 0; 2024 xfer->endpoint->usb_cmask = 0; 2025 xfer->endpoint->usb_smask = 0; 2026 break; 2027 2028 default: 2029 break; 2030 } 2031 } 2032 2033 /*------------------------------------------------------------------------* 2034 * usb_isoc_time_expand 2035 * 2036 * This function will expand the time counter from 7-bit to 16-bit. 2037 * 2038 * Returns: 2039 * 16-bit isochronous time counter. 2040 *------------------------------------------------------------------------*/ 2041 uint16_t 2042 usb_isoc_time_expand(struct usb_bus *bus, uint16_t isoc_time_curr) 2043 { 2044 uint16_t rem; 2045 2046 USB_BUS_LOCK_ASSERT(bus, MA_OWNED); 2047 2048 rem = bus->isoc_time_last & (USB_ISOC_TIME_MAX - 1); 2049 2050 isoc_time_curr &= (USB_ISOC_TIME_MAX - 1); 2051 2052 if (isoc_time_curr < rem) { 2053 /* the time counter wrapped around */ 2054 bus->isoc_time_last += USB_ISOC_TIME_MAX; 2055 } 2056 /* update the remainder */ 2057 2058 bus->isoc_time_last &= ~(USB_ISOC_TIME_MAX - 1); 2059 bus->isoc_time_last |= isoc_time_curr; 2060 2061 return (bus->isoc_time_last); 2062 } 2063 2064 /*------------------------------------------------------------------------* 2065 * usbd_fs_isoc_schedule_alloc_slot 2066 * 2067 * This function will allocate bandwidth for an isochronous FULL speed 2068 * transaction in the FULL speed schedule. 2069 * 2070 * Returns: 2071 * <8: Success 2072 * Else: Error 2073 *------------------------------------------------------------------------*/ 2074 #if USB_HAVE_TT_SUPPORT 2075 uint8_t 2076 usbd_fs_isoc_schedule_alloc_slot(struct usb_xfer *isoc_xfer, uint16_t isoc_time) 2077 { 2078 struct usb_xfer *xfer; 2079 struct usb_xfer *pipe_xfer; 2080 struct usb_bus *bus; 2081 usb_frlength_t len; 2082 usb_frlength_t data_len; 2083 uint16_t delta; 2084 uint16_t slot; 2085 uint8_t retval; 2086 2087 data_len = 0; 2088 slot = 0; 2089 2090 bus = isoc_xfer->xroot->bus; 2091 2092 TAILQ_FOREACH(xfer, &bus->intr_q.head, wait_entry) { 2093 2094 /* skip self, if any */ 2095 2096 if (xfer == isoc_xfer) 2097 continue; 2098 2099 /* check if this USB transfer is going through the same TT */ 2100 2101 if (xfer->xroot->udev->parent_hs_hub != 2102 isoc_xfer->xroot->udev->parent_hs_hub) { 2103 continue; 2104 } 2105 if ((isoc_xfer->xroot->udev->parent_hs_hub-> 2106 ddesc.bDeviceProtocol == UDPROTO_HSHUBMTT) && 2107 (xfer->xroot->udev->hs_port_no != 2108 isoc_xfer->xroot->udev->hs_port_no)) { 2109 continue; 2110 } 2111 if (xfer->endpoint->methods != isoc_xfer->endpoint->methods) 2112 continue; 2113 2114 /* check if isoc_time is part of this transfer */ 2115 2116 delta = xfer->isoc_time_complete - isoc_time; 2117 if (delta > 0 && delta <= xfer->nframes) { 2118 delta = xfer->nframes - delta; 2119 2120 len = xfer->frlengths[delta]; 2121 len += 8; 2122 len *= 7; 2123 len /= 6; 2124 2125 data_len += len; 2126 } 2127 2128 /* 2129 * Check double buffered transfers. Only stream ID 2130 * equal to zero is valid here! 2131 */ 2132 TAILQ_FOREACH(pipe_xfer, &xfer->endpoint->endpoint_q[0].head, 2133 wait_entry) { 2134 2135 /* skip self, if any */ 2136 2137 if (pipe_xfer == isoc_xfer) 2138 continue; 2139 2140 /* check if isoc_time is part of this transfer */ 2141 2142 delta = pipe_xfer->isoc_time_complete - isoc_time; 2143 if (delta > 0 && delta <= pipe_xfer->nframes) { 2144 delta = pipe_xfer->nframes - delta; 2145 2146 len = pipe_xfer->frlengths[delta]; 2147 len += 8; 2148 len *= 7; 2149 len /= 6; 2150 2151 data_len += len; 2152 } 2153 } 2154 } 2155 2156 while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) { 2157 data_len -= USB_FS_BYTES_PER_HS_UFRAME; 2158 slot++; 2159 } 2160 2161 /* check for overflow */ 2162 2163 if (slot >= USB_FS_ISOC_UFRAME_MAX) 2164 return (255); 2165 2166 retval = slot; 2167 2168 delta = isoc_xfer->isoc_time_complete - isoc_time; 2169 if (delta > 0 && delta <= isoc_xfer->nframes) { 2170 delta = isoc_xfer->nframes - delta; 2171 2172 len = isoc_xfer->frlengths[delta]; 2173 len += 8; 2174 len *= 7; 2175 len /= 6; 2176 2177 data_len += len; 2178 } 2179 2180 while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) { 2181 data_len -= USB_FS_BYTES_PER_HS_UFRAME; 2182 slot++; 2183 } 2184 2185 /* check for overflow */ 2186 2187 if (slot >= USB_FS_ISOC_UFRAME_MAX) 2188 return (255); 2189 2190 return (retval); 2191 } 2192 #endif 2193 2194 /*------------------------------------------------------------------------* 2195 * usb_bus_port_get_device 2196 * 2197 * This function is NULL safe. 2198 *------------------------------------------------------------------------*/ 2199 struct usb_device * 2200 usb_bus_port_get_device(struct usb_bus *bus, struct usb_port *up) 2201 { 2202 if ((bus == NULL) || (up == NULL)) { 2203 /* be NULL safe */ 2204 return (NULL); 2205 } 2206 if (up->device_index == 0) { 2207 /* nothing to do */ 2208 return (NULL); 2209 } 2210 return (bus->devices[up->device_index]); 2211 } 2212 2213 /*------------------------------------------------------------------------* 2214 * usb_bus_port_set_device 2215 * 2216 * This function is NULL safe. 2217 *------------------------------------------------------------------------*/ 2218 void 2219 usb_bus_port_set_device(struct usb_bus *bus, struct usb_port *up, 2220 struct usb_device *udev, uint8_t device_index) 2221 { 2222 if (bus == NULL) { 2223 /* be NULL safe */ 2224 return; 2225 } 2226 /* 2227 * There is only one case where we don't 2228 * have an USB port, and that is the Root Hub! 2229 */ 2230 if (up) { 2231 if (udev) { 2232 up->device_index = device_index; 2233 } else { 2234 device_index = up->device_index; 2235 up->device_index = 0; 2236 } 2237 } 2238 /* 2239 * Make relationships to our new device 2240 */ 2241 if (device_index != 0) { 2242 #if USB_HAVE_UGEN 2243 mtx_lock(&usb_ref_lock); 2244 #endif 2245 bus->devices[device_index] = udev; 2246 #if USB_HAVE_UGEN 2247 mtx_unlock(&usb_ref_lock); 2248 #endif 2249 } 2250 /* 2251 * Debug print 2252 */ 2253 DPRINTFN(2, "bus %p devices[%u] = %p\n", bus, device_index, udev); 2254 } 2255 2256 /*------------------------------------------------------------------------* 2257 * usb_needs_explore 2258 * 2259 * This functions is called when the USB event thread needs to run. 2260 *------------------------------------------------------------------------*/ 2261 void 2262 usb_needs_explore(struct usb_bus *bus, uint8_t do_probe) 2263 { 2264 uint8_t do_unlock; 2265 2266 DPRINTF("\n"); 2267 2268 if (cold != 0) { 2269 DPRINTF("Cold\n"); 2270 return; 2271 } 2272 2273 if (bus == NULL) { 2274 DPRINTF("No bus pointer!\n"); 2275 return; 2276 } 2277 if ((bus->devices == NULL) || 2278 (bus->devices[USB_ROOT_HUB_ADDR] == NULL)) { 2279 DPRINTF("No root HUB\n"); 2280 return; 2281 } 2282 if (mtx_owned(&bus->bus_mtx)) { 2283 do_unlock = 0; 2284 } else { 2285 USB_BUS_LOCK(bus); 2286 do_unlock = 1; 2287 } 2288 if (do_probe) { 2289 bus->do_probe = 1; 2290 } 2291 if (usb_proc_msignal(USB_BUS_EXPLORE_PROC(bus), 2292 &bus->explore_msg[0], &bus->explore_msg[1])) { 2293 /* ignore */ 2294 } 2295 if (do_unlock) { 2296 USB_BUS_UNLOCK(bus); 2297 } 2298 } 2299 2300 /*------------------------------------------------------------------------* 2301 * usb_needs_explore_all 2302 * 2303 * This function is called whenever a new driver is loaded and will 2304 * cause that all USB buses are re-explored. 2305 *------------------------------------------------------------------------*/ 2306 void 2307 usb_needs_explore_all(void) 2308 { 2309 struct usb_bus *bus; 2310 devclass_t dc; 2311 device_t dev; 2312 int max; 2313 2314 DPRINTFN(3, "\n"); 2315 2316 dc = usb_devclass_ptr; 2317 if (dc == NULL) { 2318 DPRINTFN(0, "no devclass\n"); 2319 return; 2320 } 2321 /* 2322 * Explore all USB buses in parallel. 2323 */ 2324 max = devclass_get_maxunit(dc); 2325 while (max >= 0) { 2326 dev = devclass_get_device(dc, max); 2327 if (dev) { 2328 bus = device_get_softc(dev); 2329 if (bus) { 2330 usb_needs_explore(bus, 1); 2331 } 2332 } 2333 max--; 2334 } 2335 } 2336 2337 /*------------------------------------------------------------------------* 2338 * usb_needs_explore_init 2339 * 2340 * This function will ensure that the USB controllers are not enumerated 2341 * until the "cold" variable is cleared. 2342 *------------------------------------------------------------------------*/ 2343 static void 2344 usb_needs_explore_init(void *arg) 2345 { 2346 /* 2347 * The cold variable should be cleared prior to this function 2348 * being called: 2349 */ 2350 if (cold == 0) 2351 usb_needs_explore_all(); 2352 else 2353 DPRINTFN(-1, "Cold variable is still set!\n"); 2354 } 2355 SYSINIT(usb_needs_explore_init, SI_SUB_KICK_SCHEDULER, SI_ORDER_SECOND, usb_needs_explore_init, NULL); 2356 2357 /*------------------------------------------------------------------------* 2358 * usb_bus_power_update 2359 * 2360 * This function will ensure that all USB devices on the given bus are 2361 * properly suspended or resumed according to the device transfer 2362 * state. 2363 *------------------------------------------------------------------------*/ 2364 #if USB_HAVE_POWERD 2365 void 2366 usb_bus_power_update(struct usb_bus *bus) 2367 { 2368 usb_needs_explore(bus, 0 /* no probe */ ); 2369 } 2370 #endif 2371 2372 /*------------------------------------------------------------------------* 2373 * usbd_transfer_power_ref 2374 * 2375 * This function will modify the power save reference counts and 2376 * wakeup the USB device associated with the given USB transfer, if 2377 * needed. 2378 *------------------------------------------------------------------------*/ 2379 #if USB_HAVE_POWERD 2380 void 2381 usbd_transfer_power_ref(struct usb_xfer *xfer, int val) 2382 { 2383 static const usb_power_mask_t power_mask[4] = { 2384 [UE_CONTROL] = USB_HW_POWER_CONTROL, 2385 [UE_BULK] = USB_HW_POWER_BULK, 2386 [UE_INTERRUPT] = USB_HW_POWER_INTERRUPT, 2387 [UE_ISOCHRONOUS] = USB_HW_POWER_ISOC, 2388 }; 2389 struct usb_device *udev; 2390 uint8_t needs_explore; 2391 uint8_t needs_hw_power; 2392 uint8_t xfer_type; 2393 2394 udev = xfer->xroot->udev; 2395 2396 if (udev->device_index == USB_ROOT_HUB_ADDR) { 2397 /* no power save for root HUB */ 2398 return; 2399 } 2400 USB_BUS_LOCK(udev->bus); 2401 2402 xfer_type = xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE; 2403 2404 udev->pwr_save.last_xfer_time = ticks; 2405 udev->pwr_save.type_refs[xfer_type] += val; 2406 2407 if (xfer->flags_int.control_xfr) { 2408 udev->pwr_save.read_refs += val; 2409 if (xfer->flags_int.usb_mode == USB_MODE_HOST) { 2410 /* 2411 * It is not allowed to suspend during a 2412 * control transfer: 2413 */ 2414 udev->pwr_save.write_refs += val; 2415 } 2416 } else if (USB_GET_DATA_ISREAD(xfer)) { 2417 udev->pwr_save.read_refs += val; 2418 } else { 2419 udev->pwr_save.write_refs += val; 2420 } 2421 2422 if (val > 0) { 2423 if (udev->flags.self_suspended) 2424 needs_explore = usb_peer_should_wakeup(udev); 2425 else 2426 needs_explore = 0; 2427 2428 if (!(udev->bus->hw_power_state & power_mask[xfer_type])) { 2429 DPRINTF("Adding type %u to power state\n", xfer_type); 2430 udev->bus->hw_power_state |= power_mask[xfer_type]; 2431 needs_hw_power = 1; 2432 } else { 2433 needs_hw_power = 0; 2434 } 2435 } else { 2436 needs_explore = 0; 2437 needs_hw_power = 0; 2438 } 2439 2440 USB_BUS_UNLOCK(udev->bus); 2441 2442 if (needs_explore) { 2443 DPRINTF("update\n"); 2444 usb_bus_power_update(udev->bus); 2445 } else if (needs_hw_power) { 2446 DPRINTF("needs power\n"); 2447 if (udev->bus->methods->set_hw_power != NULL) { 2448 (udev->bus->methods->set_hw_power) (udev->bus); 2449 } 2450 } 2451 } 2452 #endif 2453 2454 /*------------------------------------------------------------------------* 2455 * usb_peer_should_wakeup 2456 * 2457 * This function returns non-zero if the current device should wake up. 2458 *------------------------------------------------------------------------*/ 2459 static uint8_t 2460 usb_peer_should_wakeup(struct usb_device *udev) 2461 { 2462 return (((udev->power_mode == USB_POWER_MODE_ON) && 2463 (udev->flags.usb_mode == USB_MODE_HOST)) || 2464 (udev->driver_added_refcount != udev->bus->driver_added_refcount) || 2465 (udev->re_enumerate_wait != USB_RE_ENUM_DONE) || 2466 (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0) || 2467 (udev->pwr_save.write_refs != 0) || 2468 ((udev->pwr_save.read_refs != 0) && 2469 (udev->flags.usb_mode == USB_MODE_HOST) && 2470 (usb_peer_can_wakeup(udev) == 0))); 2471 } 2472 2473 /*------------------------------------------------------------------------* 2474 * usb_bus_powerd 2475 * 2476 * This function implements the USB power daemon and is called 2477 * regularly from the USB explore thread. 2478 *------------------------------------------------------------------------*/ 2479 #if USB_HAVE_POWERD 2480 void 2481 usb_bus_powerd(struct usb_bus *bus) 2482 { 2483 struct usb_device *udev; 2484 usb_ticks_t temp; 2485 usb_ticks_t limit; 2486 usb_ticks_t mintime; 2487 usb_size_t type_refs[5]; 2488 uint8_t x; 2489 2490 limit = usb_power_timeout; 2491 if (limit == 0) 2492 limit = hz; 2493 else if (limit > 255) 2494 limit = 255 * hz; 2495 else 2496 limit = limit * hz; 2497 2498 DPRINTF("bus=%p\n", bus); 2499 2500 USB_BUS_LOCK(bus); 2501 2502 /* 2503 * The root HUB device is never suspended 2504 * and we simply skip it. 2505 */ 2506 for (x = USB_ROOT_HUB_ADDR + 1; 2507 x != bus->devices_max; x++) { 2508 2509 udev = bus->devices[x]; 2510 if (udev == NULL) 2511 continue; 2512 2513 temp = ticks - udev->pwr_save.last_xfer_time; 2514 2515 if (usb_peer_should_wakeup(udev)) { 2516 /* check if we are suspended */ 2517 if (udev->flags.self_suspended != 0) { 2518 USB_BUS_UNLOCK(bus); 2519 usb_dev_resume_peer(udev); 2520 USB_BUS_LOCK(bus); 2521 } 2522 } else if ((temp >= limit) && 2523 (udev->flags.usb_mode == USB_MODE_HOST) && 2524 (udev->flags.self_suspended == 0)) { 2525 /* try to do suspend */ 2526 2527 USB_BUS_UNLOCK(bus); 2528 usb_dev_suspend_peer(udev); 2529 USB_BUS_LOCK(bus); 2530 } 2531 } 2532 2533 /* reset counters */ 2534 2535 mintime = (usb_ticks_t)-1; 2536 type_refs[0] = 0; 2537 type_refs[1] = 0; 2538 type_refs[2] = 0; 2539 type_refs[3] = 0; 2540 type_refs[4] = 0; 2541 2542 /* Re-loop all the devices to get the actual state */ 2543 2544 for (x = USB_ROOT_HUB_ADDR + 1; 2545 x != bus->devices_max; x++) { 2546 2547 udev = bus->devices[x]; 2548 if (udev == NULL) 2549 continue; 2550 2551 /* we found a non-Root-Hub USB device */ 2552 type_refs[4] += 1; 2553 2554 /* "last_xfer_time" can be updated by a resume */ 2555 temp = ticks - udev->pwr_save.last_xfer_time; 2556 2557 /* 2558 * Compute minimum time since last transfer for the complete 2559 * bus: 2560 */ 2561 if (temp < mintime) 2562 mintime = temp; 2563 2564 if (udev->flags.self_suspended == 0) { 2565 type_refs[0] += udev->pwr_save.type_refs[0]; 2566 type_refs[1] += udev->pwr_save.type_refs[1]; 2567 type_refs[2] += udev->pwr_save.type_refs[2]; 2568 type_refs[3] += udev->pwr_save.type_refs[3]; 2569 } 2570 } 2571 2572 if (mintime >= (usb_ticks_t)(1 * hz)) { 2573 /* recompute power masks */ 2574 DPRINTF("Recomputing power masks\n"); 2575 bus->hw_power_state = 0; 2576 if (type_refs[UE_CONTROL] != 0) 2577 bus->hw_power_state |= USB_HW_POWER_CONTROL; 2578 if (type_refs[UE_BULK] != 0) 2579 bus->hw_power_state |= USB_HW_POWER_BULK; 2580 if (type_refs[UE_INTERRUPT] != 0) 2581 bus->hw_power_state |= USB_HW_POWER_INTERRUPT; 2582 if (type_refs[UE_ISOCHRONOUS] != 0) 2583 bus->hw_power_state |= USB_HW_POWER_ISOC; 2584 if (type_refs[4] != 0) 2585 bus->hw_power_state |= USB_HW_POWER_NON_ROOT_HUB; 2586 } 2587 USB_BUS_UNLOCK(bus); 2588 2589 if (bus->methods->set_hw_power != NULL) { 2590 /* always update hardware power! */ 2591 (bus->methods->set_hw_power) (bus); 2592 } 2593 return; 2594 } 2595 #endif 2596 2597 /*------------------------------------------------------------------------* 2598 * usb_dev_resume_peer 2599 * 2600 * This function will resume an USB peer and do the required USB 2601 * signalling to get an USB device out of the suspended state. 2602 *------------------------------------------------------------------------*/ 2603 static void 2604 usb_dev_resume_peer(struct usb_device *udev) 2605 { 2606 struct usb_bus *bus; 2607 int err; 2608 2609 /* be NULL safe */ 2610 if (udev == NULL) 2611 return; 2612 2613 /* check if already resumed */ 2614 if (udev->flags.self_suspended == 0) 2615 return; 2616 2617 /* we need a parent HUB to do resume */ 2618 if (udev->parent_hub == NULL) 2619 return; 2620 2621 DPRINTF("udev=%p\n", udev); 2622 2623 if ((udev->flags.usb_mode == USB_MODE_DEVICE) && 2624 (udev->flags.remote_wakeup == 0)) { 2625 /* 2626 * If the host did not set the remote wakeup feature, we can 2627 * not wake it up either! 2628 */ 2629 DPRINTF("remote wakeup is not set!\n"); 2630 return; 2631 } 2632 /* get bus pointer */ 2633 bus = udev->bus; 2634 2635 /* resume parent hub first */ 2636 usb_dev_resume_peer(udev->parent_hub); 2637 2638 /* reduce chance of instant resume failure by waiting a little bit */ 2639 usb_pause_mtx(NULL, USB_MS_TO_TICKS(20)); 2640 2641 if (usb_device_20_compatible(udev)) { 2642 /* resume current port (Valid in Host and Device Mode) */ 2643 err = usbd_req_clear_port_feature(udev->parent_hub, 2644 NULL, udev->port_no, UHF_PORT_SUSPEND); 2645 if (err) { 2646 DPRINTFN(0, "Resuming port failed\n"); 2647 return; 2648 } 2649 } else { 2650 /* resume current port (Valid in Host and Device Mode) */ 2651 err = usbd_req_set_port_link_state(udev->parent_hub, 2652 NULL, udev->port_no, UPS_PORT_LS_U0); 2653 if (err) { 2654 DPRINTFN(0, "Resuming port failed\n"); 2655 return; 2656 } 2657 } 2658 2659 /* resume settle time */ 2660 usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay)); 2661 2662 if (bus->methods->device_resume != NULL) { 2663 /* resume USB device on the USB controller */ 2664 (bus->methods->device_resume) (udev); 2665 } 2666 USB_BUS_LOCK(bus); 2667 /* set that this device is now resumed */ 2668 udev->flags.self_suspended = 0; 2669 #if USB_HAVE_POWERD 2670 /* make sure that we don't go into suspend right away */ 2671 udev->pwr_save.last_xfer_time = ticks; 2672 2673 /* make sure the needed power masks are on */ 2674 if (udev->pwr_save.type_refs[UE_CONTROL] != 0) 2675 bus->hw_power_state |= USB_HW_POWER_CONTROL; 2676 if (udev->pwr_save.type_refs[UE_BULK] != 0) 2677 bus->hw_power_state |= USB_HW_POWER_BULK; 2678 if (udev->pwr_save.type_refs[UE_INTERRUPT] != 0) 2679 bus->hw_power_state |= USB_HW_POWER_INTERRUPT; 2680 if (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0) 2681 bus->hw_power_state |= USB_HW_POWER_ISOC; 2682 #endif 2683 USB_BUS_UNLOCK(bus); 2684 2685 if (bus->methods->set_hw_power != NULL) { 2686 /* always update hardware power! */ 2687 (bus->methods->set_hw_power) (bus); 2688 } 2689 2690 usbd_sr_lock(udev); 2691 2692 /* notify all sub-devices about resume */ 2693 err = usb_suspend_resume(udev, 0); 2694 2695 usbd_sr_unlock(udev); 2696 2697 /* check if peer has wakeup capability */ 2698 if (usb_peer_can_wakeup(udev)) { 2699 /* clear remote wakeup */ 2700 err = usbd_req_clear_device_feature(udev, 2701 NULL, UF_DEVICE_REMOTE_WAKEUP); 2702 if (err) { 2703 DPRINTFN(0, "Clearing device " 2704 "remote wakeup failed: %s\n", 2705 usbd_errstr(err)); 2706 } 2707 } 2708 } 2709 2710 /*------------------------------------------------------------------------* 2711 * usb_dev_suspend_peer 2712 * 2713 * This function will suspend an USB peer and do the required USB 2714 * signalling to get an USB device into the suspended state. 2715 *------------------------------------------------------------------------*/ 2716 static void 2717 usb_dev_suspend_peer(struct usb_device *udev) 2718 { 2719 struct usb_device *child; 2720 int err; 2721 uint8_t x; 2722 uint8_t nports; 2723 2724 repeat: 2725 /* be NULL safe */ 2726 if (udev == NULL) 2727 return; 2728 2729 /* check if already suspended */ 2730 if (udev->flags.self_suspended) 2731 return; 2732 2733 /* we need a parent HUB to do suspend */ 2734 if (udev->parent_hub == NULL) 2735 return; 2736 2737 DPRINTF("udev=%p\n", udev); 2738 2739 /* check if the current device is a HUB */ 2740 if (udev->hub != NULL) { 2741 nports = udev->hub->nports; 2742 2743 /* check if all devices on the HUB are suspended */ 2744 for (x = 0; x != nports; x++) { 2745 child = usb_bus_port_get_device(udev->bus, 2746 udev->hub->ports + x); 2747 2748 if (child == NULL) 2749 continue; 2750 2751 if (child->flags.self_suspended) 2752 continue; 2753 2754 DPRINTFN(1, "Port %u is busy on the HUB!\n", x + 1); 2755 return; 2756 } 2757 } 2758 2759 if (usb_peer_can_wakeup(udev)) { 2760 /* 2761 * This request needs to be done before we set 2762 * "udev->flags.self_suspended": 2763 */ 2764 2765 /* allow device to do remote wakeup */ 2766 err = usbd_req_set_device_feature(udev, 2767 NULL, UF_DEVICE_REMOTE_WAKEUP); 2768 if (err) { 2769 DPRINTFN(0, "Setting device " 2770 "remote wakeup failed\n"); 2771 } 2772 } 2773 2774 USB_BUS_LOCK(udev->bus); 2775 /* 2776 * Checking for suspend condition and setting suspended bit 2777 * must be atomic! 2778 */ 2779 err = usb_peer_should_wakeup(udev); 2780 if (err == 0) { 2781 /* 2782 * Set that this device is suspended. This variable 2783 * must be set before calling USB controller suspend 2784 * callbacks. 2785 */ 2786 udev->flags.self_suspended = 1; 2787 } 2788 USB_BUS_UNLOCK(udev->bus); 2789 2790 if (err != 0) { 2791 if (usb_peer_can_wakeup(udev)) { 2792 /* allow device to do remote wakeup */ 2793 err = usbd_req_clear_device_feature(udev, 2794 NULL, UF_DEVICE_REMOTE_WAKEUP); 2795 if (err) { 2796 DPRINTFN(0, "Setting device " 2797 "remote wakeup failed\n"); 2798 } 2799 } 2800 2801 if (udev->flags.usb_mode == USB_MODE_DEVICE) { 2802 /* resume parent HUB first */ 2803 usb_dev_resume_peer(udev->parent_hub); 2804 2805 /* reduce chance of instant resume failure by waiting a little bit */ 2806 usb_pause_mtx(NULL, USB_MS_TO_TICKS(20)); 2807 2808 /* resume current port (Valid in Host and Device Mode) */ 2809 err = usbd_req_clear_port_feature(udev->parent_hub, 2810 NULL, udev->port_no, UHF_PORT_SUSPEND); 2811 2812 /* resume settle time */ 2813 usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay)); 2814 } 2815 DPRINTF("Suspend was cancelled!\n"); 2816 return; 2817 } 2818 2819 usbd_sr_lock(udev); 2820 2821 /* notify all sub-devices about suspend */ 2822 err = usb_suspend_resume(udev, 1); 2823 2824 usbd_sr_unlock(udev); 2825 2826 if (udev->bus->methods->device_suspend != NULL) { 2827 usb_timeout_t temp; 2828 2829 /* suspend device on the USB controller */ 2830 (udev->bus->methods->device_suspend) (udev); 2831 2832 /* do DMA delay */ 2833 temp = usbd_get_dma_delay(udev); 2834 if (temp != 0) 2835 usb_pause_mtx(NULL, USB_MS_TO_TICKS(temp)); 2836 2837 } 2838 2839 if (usb_device_20_compatible(udev)) { 2840 /* suspend current port */ 2841 err = usbd_req_set_port_feature(udev->parent_hub, 2842 NULL, udev->port_no, UHF_PORT_SUSPEND); 2843 if (err) { 2844 DPRINTFN(0, "Suspending port failed\n"); 2845 return; 2846 } 2847 } else { 2848 /* suspend current port */ 2849 err = usbd_req_set_port_link_state(udev->parent_hub, 2850 NULL, udev->port_no, UPS_PORT_LS_U3); 2851 if (err) { 2852 DPRINTFN(0, "Suspending port failed\n"); 2853 return; 2854 } 2855 } 2856 2857 udev = udev->parent_hub; 2858 goto repeat; 2859 } 2860 2861 /*------------------------------------------------------------------------* 2862 * usbd_set_power_mode 2863 * 2864 * This function will set the power mode, see USB_POWER_MODE_XXX for a 2865 * USB device. 2866 *------------------------------------------------------------------------*/ 2867 void 2868 usbd_set_power_mode(struct usb_device *udev, uint8_t power_mode) 2869 { 2870 /* filter input argument */ 2871 if ((power_mode != USB_POWER_MODE_ON) && 2872 (power_mode != USB_POWER_MODE_OFF)) 2873 power_mode = USB_POWER_MODE_SAVE; 2874 2875 power_mode = usbd_filter_power_mode(udev, power_mode); 2876 2877 udev->power_mode = power_mode; /* update copy of power mode */ 2878 2879 #if USB_HAVE_POWERD 2880 usb_bus_power_update(udev->bus); 2881 #else 2882 usb_needs_explore(udev->bus, 0 /* no probe */ ); 2883 #endif 2884 } 2885 2886 /*------------------------------------------------------------------------* 2887 * usbd_filter_power_mode 2888 * 2889 * This function filters the power mode based on hardware requirements. 2890 *------------------------------------------------------------------------*/ 2891 uint8_t 2892 usbd_filter_power_mode(struct usb_device *udev, uint8_t power_mode) 2893 { 2894 const struct usb_bus_methods *mtod; 2895 int8_t temp; 2896 2897 mtod = udev->bus->methods; 2898 temp = -1; 2899 2900 if (mtod->get_power_mode != NULL) 2901 (mtod->get_power_mode) (udev, &temp); 2902 2903 /* check if we should not filter */ 2904 if (temp < 0) 2905 return (power_mode); 2906 2907 /* use fixed power mode given by hardware driver */ 2908 return (temp); 2909 } 2910 2911 /*------------------------------------------------------------------------* 2912 * usbd_start_re_enumerate 2913 * 2914 * This function starts re-enumeration of the given USB device. This 2915 * function does not need to be called BUS-locked. This function does 2916 * not wait until the re-enumeration is completed. 2917 *------------------------------------------------------------------------*/ 2918 void 2919 usbd_start_re_enumerate(struct usb_device *udev) 2920 { 2921 if (udev->re_enumerate_wait == USB_RE_ENUM_DONE) { 2922 udev->re_enumerate_wait = USB_RE_ENUM_START; 2923 usb_needs_explore(udev->bus, 0); 2924 } 2925 } 2926 2927 /*-----------------------------------------------------------------------* 2928 * usbd_start_set_config 2929 * 2930 * This function starts setting a USB configuration. This function 2931 * does not need to be called BUS-locked. This function does not wait 2932 * until the set USB configuratino is completed. 2933 *------------------------------------------------------------------------*/ 2934 usb_error_t 2935 usbd_start_set_config(struct usb_device *udev, uint8_t index) 2936 { 2937 if (udev->re_enumerate_wait == USB_RE_ENUM_DONE) { 2938 if (udev->curr_config_index == index) { 2939 /* no change needed */ 2940 return (0); 2941 } 2942 udev->next_config_index = index; 2943 udev->re_enumerate_wait = USB_RE_ENUM_SET_CONFIG; 2944 usb_needs_explore(udev->bus, 0); 2945 return (0); 2946 } else if (udev->re_enumerate_wait == USB_RE_ENUM_SET_CONFIG) { 2947 if (udev->next_config_index == index) { 2948 /* no change needed */ 2949 return (0); 2950 } 2951 } 2952 return (USB_ERR_PENDING_REQUESTS); 2953 }
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