1 /* $FreeBSD$ */ 2 /*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_ddb.h" 28 29 #include <sys/stdint.h> 30 #include <sys/param.h> 31 #include <sys/queue.h> 32 #include <sys/types.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/module.h> 37 #include <sys/lock.h> 38 #include <sys/condvar.h> 39 #include <sys/sysctl.h> 40 #include <sys/unistd.h> 41 #include <sys/callout.h> 42 #include <sys/malloc.h> 43 #include <sys/priv.h> 44 45 #include <bus/u4b/usb.h> 46 #include <bus/u4b/usbdi.h> 47 48 #define USB_DEBUG_VAR usb_ctrl_debug 49 50 #include <bus/u4b/usb_core.h> 51 #include <bus/u4b/usb_debug.h> 52 #include <bus/u4b/usb_process.h> 53 #include <bus/u4b/usb_busdma.h> 54 #include <bus/u4b/usb_dynamic.h> 55 #include <bus/u4b/usb_device.h> 56 #include <bus/u4b/usb_hub.h> 57 58 #include <bus/u4b/usb_controller.h> 59 #include <bus/u4b/usb_bus.h> 60 #include <bus/u4b/usb_pf.h> 61 #include "usb_if.h" 62 63 /* function prototypes */ 64 65 static device_probe_t usb_probe; 66 static device_attach_t usb_attach; 67 static device_detach_t usb_detach; 68 static device_suspend_t usb_suspend; 69 static device_resume_t usb_resume; 70 static device_shutdown_t usb_shutdown; 71 72 static void usb_attach_sub(device_t, struct usb_bus *); 73 74 /* static variables */ 75 76 #ifdef USB_DEBUG 77 static int usb_ctrl_debug = 0; 78 79 static SYSCTL_NODE(_hw_usb, OID_AUTO, ctrl, CTLFLAG_RW, 0, "USB controller"); 80 SYSCTL_INT(_hw_usb_ctrl, OID_AUTO, debug, CTLFLAG_RW, &usb_ctrl_debug, 0, 81 "Debug level"); 82 #endif 83 84 static int usb_no_boot_wait = 0; 85 TUNABLE_INT("hw.usb.no_boot_wait", &usb_no_boot_wait); 86 /* XXX freebsd uses CTLFLAG_RDTUN here */ 87 SYSCTL_INT(_hw_usb, OID_AUTO, no_boot_wait, CTLFLAG_RW, &usb_no_boot_wait, 0, 88 "No USB device enumerate waiting at boot."); 89 90 static int usb_no_shutdown_wait = 0; 91 TUNABLE_INT("hw.usb.no_shutdown_wait", &usb_no_shutdown_wait); 92 SYSCTL_INT(_hw_usb, OID_AUTO, no_shutdown_wait, CTLFLAG_RW, &usb_no_shutdown_wait, 0, 93 "No USB device waiting at system shutdown."); 94 95 static devclass_t usb_devclass; 96 97 static device_method_t usb_methods[] = { 98 DEVMETHOD(device_probe, usb_probe), 99 DEVMETHOD(device_attach, usb_attach), 100 DEVMETHOD(device_detach, usb_detach), 101 DEVMETHOD(device_suspend, usb_suspend), 102 DEVMETHOD(device_resume, usb_resume), 103 DEVMETHOD(device_shutdown, usb_shutdown), 104 DEVMETHOD_END 105 }; 106 107 static driver_t usb_driver = { 108 .name = "usbus", 109 .methods = usb_methods, 110 .size = 0, 111 }; 112 113 /* Host Only Drivers */ 114 DRIVER_MODULE(usbus, ohci, usb_driver, usb_devclass, NULL, NULL); 115 DRIVER_MODULE(usbus, uhci, usb_driver, usb_devclass, NULL, NULL); 116 DRIVER_MODULE(usbus, ehci, usb_driver, usb_devclass, NULL, NULL); 117 DRIVER_MODULE(usbus, xhci, usb_driver, usb_devclass, NULL, NULL); 118 119 /*------------------------------------------------------------------------* 120 * usb_probe 121 * 122 * This function is called from "{ehci,ohci,uhci}_pci_attach()". 123 *------------------------------------------------------------------------*/ 124 static int 125 usb_probe(device_t dev) 126 { 127 DPRINTF("\n"); 128 return (0); 129 } 130 131 static void 132 usb_root_mount_rel(struct usb_bus *bus) 133 { 134 if (bus->bus_roothold != NULL) { 135 DPRINTF("Releasing root mount hold %p\n", bus->bus_roothold); 136 #if 0 /* XXX Dragonflybsd seems to not have this? */ 137 root_mount_rel(bus->bus_roothold); 138 #endif 139 bus->bus_roothold = NULL; 140 } 141 } 142 143 /*------------------------------------------------------------------------* 144 * usb_attach 145 *------------------------------------------------------------------------*/ 146 static int 147 usb_attach(device_t dev) 148 { 149 struct usb_bus *bus = device_get_ivars(dev); 150 151 DPRINTF("\n"); 152 153 if (bus == NULL) { 154 device_printf(dev, "USB device has no ivars\n"); 155 return (ENXIO); 156 } 157 158 #if 0 /* XXX: Dragonfly does not seem to have this mechanism? */ 159 if (usb_no_boot_wait == 0) { 160 /* delay vfs_mountroot until the bus is explored */ 161 bus->bus_roothold = root_mount_hold(device_get_nameunit(dev)); 162 } 163 #endif 164 165 usb_attach_sub(dev, bus); 166 167 return (0); /* return success */ 168 } 169 170 /*------------------------------------------------------------------------* 171 * usb_detach 172 *------------------------------------------------------------------------*/ 173 static int 174 usb_detach(device_t dev) 175 { 176 struct usb_bus *bus = device_get_softc(dev); 177 178 DPRINTF("\n"); 179 180 if (bus == NULL) { 181 /* was never setup properly */ 182 return (0); 183 } 184 /* Stop power watchdog */ 185 usb_callout_drain(&bus->power_wdog); 186 187 /* Let the USB explore process detach all devices. */ 188 usb_root_mount_rel(bus); 189 190 USB_BUS_LOCK(bus); 191 192 /* Queue detach job */ 193 usb_proc_msignal(&bus->explore_proc, 194 &bus->detach_msg[0], &bus->detach_msg[1]); 195 196 /* Wait for detach to complete */ 197 usb_proc_mwait(&bus->explore_proc, 198 &bus->detach_msg[0], &bus->detach_msg[1]); 199 200 USB_BUS_UNLOCK(bus); 201 202 /* Get rid of USB callback processes */ 203 204 usb_proc_free(&bus->giant_callback_proc); 205 usb_proc_free(&bus->non_giant_callback_proc); 206 207 /* Get rid of USB explore process */ 208 209 usb_proc_free(&bus->explore_proc); 210 211 /* Get rid of control transfer process */ 212 213 usb_proc_free(&bus->control_xfer_proc); 214 215 #if USB_HAVE_PF 216 usbpf_detach(bus); 217 #endif 218 return (0); 219 } 220 221 /*------------------------------------------------------------------------* 222 * usb_suspend 223 *------------------------------------------------------------------------*/ 224 static int 225 usb_suspend(device_t dev) 226 { 227 struct usb_bus *bus = device_get_softc(dev); 228 229 DPRINTF("\n"); 230 231 if (bus == NULL) { 232 /* was never setup properly */ 233 return (0); 234 } 235 236 USB_BUS_LOCK(bus); 237 usb_proc_msignal(&bus->explore_proc, 238 &bus->suspend_msg[0], &bus->suspend_msg[1]); 239 USB_BUS_UNLOCK(bus); 240 241 return (0); 242 } 243 244 /*------------------------------------------------------------------------* 245 * usb_resume 246 *------------------------------------------------------------------------*/ 247 static int 248 usb_resume(device_t dev) 249 { 250 struct usb_bus *bus = device_get_softc(dev); 251 252 DPRINTF("\n"); 253 254 if (bus == NULL) { 255 /* was never setup properly */ 256 return (0); 257 } 258 259 USB_BUS_LOCK(bus); 260 usb_proc_msignal(&bus->explore_proc, 261 &bus->resume_msg[0], &bus->resume_msg[1]); 262 USB_BUS_UNLOCK(bus); 263 264 return (0); 265 } 266 267 /*------------------------------------------------------------------------* 268 * usb_shutdown 269 *------------------------------------------------------------------------*/ 270 static int 271 usb_shutdown(device_t dev) 272 { 273 struct usb_bus *bus = device_get_softc(dev); 274 275 DPRINTF("\n"); 276 277 if (bus == NULL) { 278 /* was never setup properly */ 279 return (0); 280 } 281 282 device_printf(bus->bdev, "Controller shutdown\n"); 283 284 USB_BUS_LOCK(bus); 285 usb_proc_msignal(&bus->explore_proc, 286 &bus->shutdown_msg[0], &bus->shutdown_msg[1]); 287 if (usb_no_shutdown_wait == 0) { 288 /* wait for shutdown callback to be executed */ 289 usb_proc_mwait(&bus->explore_proc, 290 &bus->shutdown_msg[0], &bus->shutdown_msg[1]); 291 } 292 USB_BUS_UNLOCK(bus); 293 294 device_printf(bus->bdev, "Controller shutdown complete\n"); 295 296 return (0); 297 } 298 299 /*------------------------------------------------------------------------* 300 * usb_bus_explore 301 * 302 * This function is used to explore the device tree from the root. 303 *------------------------------------------------------------------------*/ 304 static void 305 usb_bus_explore(struct usb_proc_msg *pm) 306 { 307 struct usb_bus *bus; 308 struct usb_device *udev; 309 310 bus = ((struct usb_bus_msg *)pm)->bus; 311 udev = bus->devices[USB_ROOT_HUB_ADDR]; 312 313 if (bus->no_explore != 0) 314 return; 315 316 if (udev && udev->hub) { 317 318 if (bus->do_probe) { 319 bus->do_probe = 0; 320 bus->driver_added_refcount++; 321 } 322 if (bus->driver_added_refcount == 0) { 323 /* avoid zero, hence that is memory default */ 324 bus->driver_added_refcount = 1; 325 } 326 327 #ifdef DDB 328 /* 329 * The following three lines of code are only here to 330 * recover from DDB: 331 */ 332 usb_proc_rewakeup(&bus->control_xfer_proc); 333 usb_proc_rewakeup(&bus->giant_callback_proc); 334 usb_proc_rewakeup(&bus->non_giant_callback_proc); 335 #endif 336 337 USB_BUS_UNLOCK(bus); 338 339 #if USB_HAVE_POWERD 340 /* 341 * First update the USB power state! 342 */ 343 usb_bus_powerd(bus); 344 #endif 345 /* Explore the Root USB HUB. */ 346 (udev->hub->explore) (udev); 347 USB_BUS_LOCK(bus); 348 } 349 usb_root_mount_rel(bus); 350 } 351 352 /*------------------------------------------------------------------------* 353 * usb_bus_detach 354 * 355 * This function is used to detach the device tree from the root. 356 *------------------------------------------------------------------------*/ 357 static void 358 usb_bus_detach(struct usb_proc_msg *pm) 359 { 360 struct usb_bus *bus; 361 struct usb_device *udev; 362 device_t dev; 363 364 bus = ((struct usb_bus_msg *)pm)->bus; 365 udev = bus->devices[USB_ROOT_HUB_ADDR]; 366 dev = bus->bdev; 367 /* clear the softc */ 368 device_set_softc(dev, NULL); 369 USB_BUS_UNLOCK(bus); 370 371 /* detach children first */ 372 bus_generic_detach(dev); 373 374 /* 375 * Free USB device and all subdevices, if any. 376 */ 377 usb_free_device(udev, 0); 378 379 USB_BUS_LOCK(bus); 380 /* clear bdev variable last */ 381 bus->bdev = NULL; 382 } 383 384 /*------------------------------------------------------------------------* 385 * usb_bus_suspend 386 * 387 * This function is used to suspend the USB contoller. 388 *------------------------------------------------------------------------*/ 389 static void 390 usb_bus_suspend(struct usb_proc_msg *pm) 391 { 392 struct usb_bus *bus; 393 struct usb_device *udev; 394 usb_error_t err; 395 396 bus = ((struct usb_bus_msg *)pm)->bus; 397 udev = bus->devices[USB_ROOT_HUB_ADDR]; 398 399 if (udev == NULL || bus->bdev == NULL) 400 return; 401 402 USB_BUS_UNLOCK(bus); 403 404 bus_generic_shutdown(bus->bdev); 405 406 usbd_enum_lock(udev); 407 408 err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX); 409 if (err) 410 device_printf(bus->bdev, "Could not unconfigure root HUB\n"); 411 412 USB_BUS_LOCK(bus); 413 bus->hw_power_state = 0; 414 bus->no_explore = 1; 415 USB_BUS_UNLOCK(bus); 416 417 if (bus->methods->set_hw_power != NULL) 418 (bus->methods->set_hw_power) (bus); 419 420 if (bus->methods->set_hw_power_sleep != NULL) 421 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SUSPEND); 422 423 usbd_enum_unlock(udev); 424 425 USB_BUS_LOCK(bus); 426 } 427 428 /*------------------------------------------------------------------------* 429 * usb_bus_resume 430 * 431 * This function is used to resume the USB contoller. 432 *------------------------------------------------------------------------*/ 433 static void 434 usb_bus_resume(struct usb_proc_msg *pm) 435 { 436 struct usb_bus *bus; 437 struct usb_device *udev; 438 usb_error_t err; 439 440 bus = ((struct usb_bus_msg *)pm)->bus; 441 udev = bus->devices[USB_ROOT_HUB_ADDR]; 442 443 if (udev == NULL || bus->bdev == NULL) 444 return; 445 446 USB_BUS_UNLOCK(bus); 447 448 usbd_enum_lock(udev); 449 #if 0 450 DEVMETHOD(usb_take_controller, NULL); /* dummy */ 451 #endif 452 USB_TAKE_CONTROLLER(device_get_parent(bus->bdev)); 453 454 USB_BUS_LOCK(bus); 455 bus->hw_power_state = 456 USB_HW_POWER_CONTROL | 457 USB_HW_POWER_BULK | 458 USB_HW_POWER_INTERRUPT | 459 USB_HW_POWER_ISOC | 460 USB_HW_POWER_NON_ROOT_HUB; 461 bus->no_explore = 0; 462 USB_BUS_UNLOCK(bus); 463 464 if (bus->methods->set_hw_power_sleep != NULL) 465 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_RESUME); 466 467 if (bus->methods->set_hw_power != NULL) 468 (bus->methods->set_hw_power) (bus); 469 470 /* restore USB configuration to index 0 */ 471 err = usbd_set_config_index(udev, 0); 472 if (err) 473 device_printf(bus->bdev, "Could not configure root HUB\n"); 474 475 /* probe and attach */ 476 err = usb_probe_and_attach(udev, USB_IFACE_INDEX_ANY); 477 if (err) { 478 device_printf(bus->bdev, "Could not probe and " 479 "attach root HUB\n"); 480 } 481 482 usbd_enum_unlock(udev); 483 484 USB_BUS_LOCK(bus); 485 } 486 487 /*------------------------------------------------------------------------* 488 * usb_bus_shutdown 489 * 490 * This function is used to shutdown the USB contoller. 491 *------------------------------------------------------------------------*/ 492 static void 493 usb_bus_shutdown(struct usb_proc_msg *pm) 494 { 495 struct usb_bus *bus; 496 struct usb_device *udev; 497 usb_error_t err; 498 499 bus = ((struct usb_bus_msg *)pm)->bus; 500 udev = bus->devices[USB_ROOT_HUB_ADDR]; 501 502 if (udev == NULL || bus->bdev == NULL) 503 return; 504 505 USB_BUS_UNLOCK(bus); 506 507 bus_generic_shutdown(bus->bdev); 508 509 usbd_enum_lock(udev); 510 511 err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX); 512 if (err) 513 device_printf(bus->bdev, "Could not unconfigure root HUB\n"); 514 515 USB_BUS_LOCK(bus); 516 bus->hw_power_state = 0; 517 bus->no_explore = 1; 518 USB_BUS_UNLOCK(bus); 519 520 if (bus->methods->set_hw_power != NULL) 521 (bus->methods->set_hw_power) (bus); 522 523 if (bus->methods->set_hw_power_sleep != NULL) 524 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SHUTDOWN); 525 526 usbd_enum_unlock(udev); 527 528 USB_BUS_LOCK(bus); 529 } 530 531 static void 532 usb_power_wdog(void *arg) 533 { 534 struct usb_bus *bus = arg; 535 USB_BUS_LOCK_ASSERT(bus); 536 537 usb_callout_reset(&bus->power_wdog, 538 4 * hz, usb_power_wdog, arg); 539 540 #ifdef DDB 541 /* 542 * The following line of code is only here to recover from 543 * DDB: 544 */ 545 usb_proc_rewakeup(&bus->explore_proc); /* recover from DDB */ 546 #endif 547 548 #if USB_HAVE_POWERD 549 USB_BUS_UNLOCK(bus); 550 551 usb_bus_power_update(bus); 552 553 USB_BUS_LOCK(bus); 554 #endif 555 } 556 557 /*------------------------------------------------------------------------* 558 * usb_bus_attach 559 * 560 * This function attaches USB in context of the explore thread. 561 *------------------------------------------------------------------------*/ 562 static void 563 usb_bus_attach(struct usb_proc_msg *pm) 564 { 565 struct usb_bus *bus; 566 struct usb_device *child; 567 device_t dev; 568 usb_error_t err; 569 enum usb_dev_speed speed; 570 571 bus = ((struct usb_bus_msg *)pm)->bus; 572 dev = bus->bdev; 573 574 DPRINTF("\n"); 575 576 switch (bus->usbrev) { 577 case USB_REV_1_0: 578 speed = USB_SPEED_FULL; 579 device_printf(bus->bdev, "12Mbps Full Speed USB v1.0\n"); 580 break; 581 582 case USB_REV_1_1: 583 speed = USB_SPEED_FULL; 584 device_printf(bus->bdev, "12Mbps Full Speed USB v1.1\n"); 585 break; 586 587 case USB_REV_2_0: 588 speed = USB_SPEED_HIGH; 589 device_printf(bus->bdev, "480Mbps High Speed USB v2.0\n"); 590 break; 591 592 case USB_REV_2_5: 593 speed = USB_SPEED_VARIABLE; 594 device_printf(bus->bdev, "480Mbps Wireless USB v2.5\n"); 595 break; 596 597 case USB_REV_3_0: 598 speed = USB_SPEED_SUPER; 599 device_printf(bus->bdev, "5.0Gbps Super Speed USB v3.0\n"); 600 break; 601 602 default: 603 device_printf(bus->bdev, "Unsupported USB revision\n"); 604 usb_root_mount_rel(bus); 605 return; 606 } 607 608 /* default power_mask value */ 609 bus->hw_power_state = 610 USB_HW_POWER_CONTROL | 611 USB_HW_POWER_BULK | 612 USB_HW_POWER_INTERRUPT | 613 USB_HW_POWER_ISOC | 614 USB_HW_POWER_NON_ROOT_HUB; 615 616 USB_BUS_UNLOCK(bus); 617 618 /* make sure power is set at least once */ 619 620 if (bus->methods->set_hw_power != NULL) { 621 (bus->methods->set_hw_power) (bus); 622 } 623 624 /* allocate the Root USB device */ 625 626 child = usb_alloc_device(bus->bdev, bus, NULL, 0, 0, 1, 627 speed, USB_MODE_HOST); 628 if (child) { 629 err = usb_probe_and_attach(child, 630 USB_IFACE_INDEX_ANY); 631 if (!err) { 632 if ((bus->devices[USB_ROOT_HUB_ADDR] == NULL) || 633 (bus->devices[USB_ROOT_HUB_ADDR]->hub == NULL)) { 634 err = USB_ERR_NO_ROOT_HUB; 635 } 636 } 637 } else { 638 err = USB_ERR_NOMEM; 639 } 640 641 USB_BUS_LOCK(bus); 642 643 if (err) { 644 device_printf(bus->bdev, "Root HUB problem, error=%s\n", 645 usbd_errstr(err)); 646 usb_root_mount_rel(bus); 647 } 648 649 /* set softc - we are ready */ 650 device_set_softc(dev, bus); 651 652 /* start watchdog */ 653 usb_power_wdog(bus); 654 } 655 656 /*------------------------------------------------------------------------* 657 * usb_attach_sub 658 * 659 * This function creates a thread which runs the USB attach code. 660 *------------------------------------------------------------------------*/ 661 static void 662 usb_attach_sub(device_t dev, struct usb_bus *bus) 663 { 664 const char *pname = device_get_nameunit(dev); 665 666 if (usb_devclass_ptr == NULL) 667 usb_devclass_ptr = devclass_find("usbus"); 668 669 #if USB_HAVE_PF 670 usbpf_attach(bus); 671 #endif 672 /* Initialise USB process messages */ 673 bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore; 674 bus->explore_msg[0].bus = bus; 675 bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore; 676 bus->explore_msg[1].bus = bus; 677 678 bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach; 679 bus->detach_msg[0].bus = bus; 680 bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach; 681 bus->detach_msg[1].bus = bus; 682 683 bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach; 684 bus->attach_msg[0].bus = bus; 685 bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach; 686 bus->attach_msg[1].bus = bus; 687 688 bus->suspend_msg[0].hdr.pm_callback = &usb_bus_suspend; 689 bus->suspend_msg[0].bus = bus; 690 bus->suspend_msg[1].hdr.pm_callback = &usb_bus_suspend; 691 bus->suspend_msg[1].bus = bus; 692 693 bus->resume_msg[0].hdr.pm_callback = &usb_bus_resume; 694 bus->resume_msg[0].bus = bus; 695 bus->resume_msg[1].hdr.pm_callback = &usb_bus_resume; 696 bus->resume_msg[1].bus = bus; 697 698 bus->shutdown_msg[0].hdr.pm_callback = &usb_bus_shutdown; 699 bus->shutdown_msg[0].bus = bus; 700 bus->shutdown_msg[1].hdr.pm_callback = &usb_bus_shutdown; 701 bus->shutdown_msg[1].bus = bus; 702 703 /* Create USB explore and callback processes */ 704 705 if (usb_proc_create(&bus->giant_callback_proc, 706 &bus->bus_lock, pname, USB_PRI_MED)) { 707 device_printf(dev, "WARNING: Creation of USB Giant " 708 "callback process failed.\n"); 709 } else if (usb_proc_create(&bus->non_giant_callback_proc, 710 &bus->bus_lock, pname, USB_PRI_HIGH)) { 711 device_printf(dev, "WARNING: Creation of USB non-Giant " 712 "callback process failed.\n"); 713 } else if (usb_proc_create(&bus->explore_proc, 714 &bus->bus_lock, pname, USB_PRI_MED)) { 715 device_printf(dev, "WARNING: Creation of USB explore " 716 "process failed.\n"); 717 } else if (usb_proc_create(&bus->control_xfer_proc, 718 &bus->bus_lock, pname, USB_PRI_MED)) { 719 device_printf(dev, "WARNING: Creation of USB control transfer " 720 "process failed.\n"); 721 } else { 722 /* Get final attach going */ 723 USB_BUS_LOCK(bus); 724 usb_proc_msignal(&bus->explore_proc, 725 &bus->attach_msg[0], &bus->attach_msg[1]); 726 USB_BUS_UNLOCK(bus); 727 728 /* Do initial explore */ 729 usb_needs_explore(bus, 1); 730 } 731 } 732 733 SYSUNINIT(usb_bus_unload, SI_SUB_CONFIGURE, SI_ORDER_ANY, usb_bus_unload, NULL); 734 735 /*------------------------------------------------------------------------* 736 * usb_bus_mem_flush_all_cb 737 *------------------------------------------------------------------------*/ 738 #if USB_HAVE_BUSDMA 739 static void 740 usb_bus_mem_flush_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 741 struct usb_page *pg, usb_size_t size, usb_size_t align) 742 { 743 usb_pc_cpu_flush(pc); 744 } 745 #endif 746 747 /*------------------------------------------------------------------------* 748 * usb_bus_mem_flush_all - factored out code 749 *------------------------------------------------------------------------*/ 750 #if USB_HAVE_BUSDMA 751 void 752 usb_bus_mem_flush_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 753 { 754 if (cb) { 755 cb(bus, &usb_bus_mem_flush_all_cb); 756 } 757 } 758 #endif 759 760 /*------------------------------------------------------------------------* 761 * usb_bus_mem_alloc_all_cb 762 *------------------------------------------------------------------------*/ 763 #if USB_HAVE_BUSDMA 764 static void 765 usb_bus_mem_alloc_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 766 struct usb_page *pg, usb_size_t size, usb_size_t align) 767 { 768 /* need to initialize the page cache */ 769 pc->tag_parent = bus->dma_parent_tag; 770 771 if (usb_pc_alloc_mem(pc, pg, size, align)) { 772 bus->alloc_failed = 1; 773 } 774 } 775 #endif 776 777 /*------------------------------------------------------------------------* 778 * usb_bus_mem_alloc_all - factored out code 779 * 780 * Returns: 781 * 0: Success 782 * Else: Failure 783 *------------------------------------------------------------------------*/ 784 uint8_t 785 usb_bus_mem_alloc_all(struct usb_bus *bus, bus_dma_tag_t dmat, 786 usb_bus_mem_cb_t *cb) 787 { 788 bus->alloc_failed = 0; 789 790 lockinit(&bus->bus_lock, "USB bus mem", 0, LK_CANRECURSE); 791 792 usb_callout_init_mtx(&bus->power_wdog, 793 &bus->bus_lock, 0); 794 795 TAILQ_INIT(&bus->intr_q.head); 796 797 #if USB_HAVE_BUSDMA 798 usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags, 799 dmat, &bus->bus_lock, NULL, 32, USB_BUS_DMA_TAG_MAX); 800 #endif 801 if ((bus->devices_max > USB_MAX_DEVICES) || 802 (bus->devices_max < USB_MIN_DEVICES) || 803 (bus->devices == NULL)) { 804 DPRINTFN(0, "Devices field has not been " 805 "initialised properly\n"); 806 bus->alloc_failed = 1; /* failure */ 807 } 808 #if USB_HAVE_BUSDMA 809 if (cb) { 810 cb(bus, &usb_bus_mem_alloc_all_cb); 811 } 812 #endif 813 if (bus->alloc_failed) { 814 usb_bus_mem_free_all(bus, cb); 815 } 816 return (bus->alloc_failed); 817 } 818 819 /*------------------------------------------------------------------------* 820 * usb_bus_mem_free_all_cb 821 *------------------------------------------------------------------------*/ 822 #if USB_HAVE_BUSDMA 823 static void 824 usb_bus_mem_free_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 825 struct usb_page *pg, usb_size_t size, usb_size_t align) 826 { 827 usb_pc_free_mem(pc); 828 } 829 #endif 830 831 /*------------------------------------------------------------------------* 832 * usb_bus_mem_free_all - factored out code 833 *------------------------------------------------------------------------*/ 834 void 835 usb_bus_mem_free_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 836 { 837 #if USB_HAVE_BUSDMA 838 if (cb) { 839 cb(bus, &usb_bus_mem_free_all_cb); 840 } 841 usb_dma_tag_unsetup(bus->dma_parent_tag); 842 #endif 843 844 lockuninit(&bus->bus_lock); 845 } 846