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/stddef.h> 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/types.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/module.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/condvar.h> 41 #include <sys/sysctl.h> 42 #include <sys/sx.h> 43 #include <sys/unistd.h> 44 #include <sys/callout.h> 45 #include <sys/malloc.h> 46 #include <sys/priv.h> 47 48 #include <dev/usb/usb.h> 49 #include <dev/usb/usbdi.h> 50 51 #define USB_DEBUG_VAR usb_ctrl_debug 52 53 #include <dev/usb/usb_core.h> 54 #include <dev/usb/usb_debug.h> 55 #include <dev/usb/usb_process.h> 56 #include <dev/usb/usb_busdma.h> 57 #include <dev/usb/usb_dynamic.h> 58 #include <dev/usb/usb_device.h> 59 #include <dev/usb/usb_hub.h> 60 61 #include <dev/usb/usb_controller.h> 62 #include <dev/usb/usb_bus.h> 63 #include <dev/usb/usb_pf.h> 64 #include "usb_if.h" 65 66 /* function prototypes */ 67 68 static device_probe_t usb_probe; 69 static device_attach_t usb_attach; 70 static device_detach_t usb_detach; 71 static device_suspend_t usb_suspend; 72 static device_resume_t usb_resume; 73 static device_shutdown_t usb_shutdown; 74 75 static void usb_attach_sub(device_t, struct usb_bus *); 76 77 /* static variables */ 78 79 #ifdef USB_DEBUG 80 static int usb_ctrl_debug = 0; 81 82 static SYSCTL_NODE(_hw_usb, OID_AUTO, ctrl, CTLFLAG_RW, 0, "USB controller"); 83 SYSCTL_INT(_hw_usb_ctrl, OID_AUTO, debug, CTLFLAG_RW, &usb_ctrl_debug, 0, 84 "Debug level"); 85 #endif 86 87 static int usb_no_boot_wait = 0; 88 TUNABLE_INT("hw.usb.no_boot_wait", &usb_no_boot_wait); 89 SYSCTL_INT(_hw_usb, OID_AUTO, no_boot_wait, CTLFLAG_RDTUN, &usb_no_boot_wait, 0, 90 "No device enumerate waiting at boot."); 91 92 static devclass_t usb_devclass; 93 94 static device_method_t usb_methods[] = { 95 DEVMETHOD(device_probe, usb_probe), 96 DEVMETHOD(device_attach, usb_attach), 97 DEVMETHOD(device_detach, usb_detach), 98 DEVMETHOD(device_suspend, usb_suspend), 99 DEVMETHOD(device_resume, usb_resume), 100 DEVMETHOD(device_shutdown, usb_shutdown), 101 {0, 0} 102 }; 103 104 static driver_t usb_driver = { 105 .name = "usbus", 106 .methods = usb_methods, 107 .size = 0, 108 }; 109 110 /* Host Only Drivers */ 111 DRIVER_MODULE(usbus, ohci, usb_driver, usb_devclass, 0, 0); 112 DRIVER_MODULE(usbus, uhci, usb_driver, usb_devclass, 0, 0); 113 DRIVER_MODULE(usbus, ehci, usb_driver, usb_devclass, 0, 0); 114 DRIVER_MODULE(usbus, xhci, usb_driver, usb_devclass, 0, 0); 115 116 /* Device Only Drivers */ 117 DRIVER_MODULE(usbus, at91_udp, usb_driver, usb_devclass, 0, 0); 118 DRIVER_MODULE(usbus, musbotg, usb_driver, usb_devclass, 0, 0); 119 DRIVER_MODULE(usbus, uss820, usb_driver, usb_devclass, 0, 0); 120 121 /*------------------------------------------------------------------------* 122 * usb_probe 123 * 124 * This function is called from "{ehci,ohci,uhci}_pci_attach()". 125 *------------------------------------------------------------------------*/ 126 static int 127 usb_probe(device_t dev) 128 { 129 DPRINTF("\n"); 130 return (0); 131 } 132 133 static void 134 usb_root_mount_rel(struct usb_bus *bus) 135 { 136 if (bus->bus_roothold != NULL) { 137 DPRINTF("Releasing root mount hold %p\n", bus->bus_roothold); 138 root_mount_rel(bus->bus_roothold); 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 (usb_no_boot_wait == 0) { 159 /* delay vfs_mountroot until the bus is explored */ 160 bus->bus_roothold = root_mount_hold(device_get_nameunit(dev)); 161 } 162 163 usb_attach_sub(dev, bus); 164 165 return (0); /* return success */ 166 } 167 168 /*------------------------------------------------------------------------* 169 * usb_detach 170 *------------------------------------------------------------------------*/ 171 static int 172 usb_detach(device_t dev) 173 { 174 struct usb_bus *bus = device_get_softc(dev); 175 176 DPRINTF("\n"); 177 178 if (bus == NULL) { 179 /* was never setup properly */ 180 return (0); 181 } 182 /* Stop power watchdog */ 183 usb_callout_drain(&bus->power_wdog); 184 185 /* Let the USB explore process detach all devices. */ 186 usb_root_mount_rel(bus); 187 188 USB_BUS_LOCK(bus); 189 190 /* Queue detach job */ 191 usb_proc_msignal(&bus->explore_proc, 192 &bus->detach_msg[0], &bus->detach_msg[1]); 193 194 /* Wait for detach to complete */ 195 usb_proc_mwait(&bus->explore_proc, 196 &bus->detach_msg[0], &bus->detach_msg[1]); 197 198 USB_BUS_UNLOCK(bus); 199 200 /* Get rid of USB callback processes */ 201 202 usb_proc_free(&bus->giant_callback_proc); 203 usb_proc_free(&bus->non_giant_callback_proc); 204 205 /* Get rid of USB explore process */ 206 207 usb_proc_free(&bus->explore_proc); 208 209 /* Get rid of control transfer process */ 210 211 usb_proc_free(&bus->control_xfer_proc); 212 213 #if USB_HAVE_PF 214 usbpf_detach(bus); 215 #endif 216 return (0); 217 } 218 219 /*------------------------------------------------------------------------* 220 * usb_suspend 221 *------------------------------------------------------------------------*/ 222 static int 223 usb_suspend(device_t dev) 224 { 225 struct usb_bus *bus = device_get_softc(dev); 226 227 DPRINTF("\n"); 228 229 if (bus == NULL) { 230 /* was never setup properly */ 231 return (0); 232 } 233 234 USB_BUS_LOCK(bus); 235 usb_proc_msignal(&bus->explore_proc, 236 &bus->suspend_msg[0], &bus->suspend_msg[1]); 237 USB_BUS_UNLOCK(bus); 238 239 return (0); 240 } 241 242 /*------------------------------------------------------------------------* 243 * usb_resume 244 *------------------------------------------------------------------------*/ 245 static int 246 usb_resume(device_t dev) 247 { 248 struct usb_bus *bus = device_get_softc(dev); 249 250 DPRINTF("\n"); 251 252 if (bus == NULL) { 253 /* was never setup properly */ 254 return (0); 255 } 256 257 USB_BUS_LOCK(bus); 258 usb_proc_msignal(&bus->explore_proc, 259 &bus->resume_msg[0], &bus->resume_msg[1]); 260 USB_BUS_UNLOCK(bus); 261 262 return (0); 263 } 264 265 /*------------------------------------------------------------------------* 266 * usb_shutdown 267 *------------------------------------------------------------------------*/ 268 static int 269 usb_shutdown(device_t dev) 270 { 271 struct usb_bus *bus = device_get_softc(dev); 272 273 DPRINTF("\n"); 274 275 if (bus == NULL) { 276 /* was never setup properly */ 277 return (0); 278 } 279 280 USB_BUS_LOCK(bus); 281 usb_proc_msignal(&bus->explore_proc, 282 &bus->shutdown_msg[0], &bus->shutdown_msg[1]); 283 USB_BUS_UNLOCK(bus); 284 285 return (0); 286 } 287 288 /*------------------------------------------------------------------------* 289 * usb_bus_explore 290 * 291 * This function is used to explore the device tree from the root. 292 *------------------------------------------------------------------------*/ 293 static void 294 usb_bus_explore(struct usb_proc_msg *pm) 295 { 296 struct usb_bus *bus; 297 struct usb_device *udev; 298 299 bus = ((struct usb_bus_msg *)pm)->bus; 300 udev = bus->devices[USB_ROOT_HUB_ADDR]; 301 302 if (bus->no_explore != 0) 303 return; 304 305 if (udev && udev->hub) { 306 307 if (bus->do_probe) { 308 bus->do_probe = 0; 309 bus->driver_added_refcount++; 310 } 311 if (bus->driver_added_refcount == 0) { 312 /* avoid zero, hence that is memory default */ 313 bus->driver_added_refcount = 1; 314 } 315 316 #ifdef DDB 317 /* 318 * The following three lines of code are only here to 319 * recover from DDB: 320 */ 321 usb_proc_rewakeup(&bus->control_xfer_proc); 322 usb_proc_rewakeup(&bus->giant_callback_proc); 323 usb_proc_rewakeup(&bus->non_giant_callback_proc); 324 #endif 325 326 USB_BUS_UNLOCK(bus); 327 328 #if USB_HAVE_POWERD 329 /* 330 * First update the USB power state! 331 */ 332 usb_bus_powerd(bus); 333 #endif 334 /* Explore the Root USB HUB. */ 335 (udev->hub->explore) (udev); 336 USB_BUS_LOCK(bus); 337 } 338 usb_root_mount_rel(bus); 339 } 340 341 /*------------------------------------------------------------------------* 342 * usb_bus_detach 343 * 344 * This function is used to detach the device tree from the root. 345 *------------------------------------------------------------------------*/ 346 static void 347 usb_bus_detach(struct usb_proc_msg *pm) 348 { 349 struct usb_bus *bus; 350 struct usb_device *udev; 351 device_t dev; 352 353 bus = ((struct usb_bus_msg *)pm)->bus; 354 udev = bus->devices[USB_ROOT_HUB_ADDR]; 355 dev = bus->bdev; 356 /* clear the softc */ 357 device_set_softc(dev, NULL); 358 USB_BUS_UNLOCK(bus); 359 360 /* detach children first */ 361 mtx_lock(&Giant); 362 bus_generic_detach(dev); 363 mtx_unlock(&Giant); 364 365 /* 366 * Free USB device and all subdevices, if any. 367 */ 368 usb_free_device(udev, 0); 369 370 USB_BUS_LOCK(bus); 371 /* clear bdev variable last */ 372 bus->bdev = NULL; 373 } 374 375 /*------------------------------------------------------------------------* 376 * usb_bus_suspend 377 * 378 * This function is used to suspend the USB contoller. 379 *------------------------------------------------------------------------*/ 380 static void 381 usb_bus_suspend(struct usb_proc_msg *pm) 382 { 383 struct usb_bus *bus; 384 struct usb_device *udev; 385 usb_error_t err; 386 387 bus = ((struct usb_bus_msg *)pm)->bus; 388 udev = bus->devices[USB_ROOT_HUB_ADDR]; 389 390 if (udev == NULL || bus->bdev == NULL) 391 return; 392 393 USB_BUS_UNLOCK(bus); 394 395 bus_generic_shutdown(bus->bdev); 396 397 usbd_enum_lock(udev); 398 399 err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX); 400 if (err) 401 device_printf(bus->bdev, "Could not unconfigure root HUB\n"); 402 403 USB_BUS_LOCK(bus); 404 bus->hw_power_state = 0; 405 bus->no_explore = 1; 406 USB_BUS_UNLOCK(bus); 407 408 if (bus->methods->set_hw_power != NULL) 409 (bus->methods->set_hw_power) (bus); 410 411 if (bus->methods->set_hw_power_sleep != NULL) 412 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SUSPEND); 413 414 usbd_enum_unlock(udev); 415 416 USB_BUS_LOCK(bus); 417 } 418 419 /*------------------------------------------------------------------------* 420 * usb_bus_resume 421 * 422 * This function is used to resume the USB contoller. 423 *------------------------------------------------------------------------*/ 424 static void 425 usb_bus_resume(struct usb_proc_msg *pm) 426 { 427 struct usb_bus *bus; 428 struct usb_device *udev; 429 usb_error_t err; 430 431 bus = ((struct usb_bus_msg *)pm)->bus; 432 udev = bus->devices[USB_ROOT_HUB_ADDR]; 433 434 if (udev == NULL || bus->bdev == NULL) 435 return; 436 437 USB_BUS_UNLOCK(bus); 438 439 usbd_enum_lock(udev); 440 #if 0 441 DEVMETHOD(usb_take_controller, NULL); /* dummy */ 442 #endif 443 USB_TAKE_CONTROLLER(device_get_parent(bus->bdev)); 444 445 USB_BUS_LOCK(bus); 446 bus->hw_power_state = 447 USB_HW_POWER_CONTROL | 448 USB_HW_POWER_BULK | 449 USB_HW_POWER_INTERRUPT | 450 USB_HW_POWER_ISOC | 451 USB_HW_POWER_NON_ROOT_HUB; 452 bus->no_explore = 0; 453 USB_BUS_UNLOCK(bus); 454 455 if (bus->methods->set_hw_power_sleep != NULL) 456 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_RESUME); 457 458 if (bus->methods->set_hw_power != NULL) 459 (bus->methods->set_hw_power) (bus); 460 461 err = usbd_set_config_index(udev, 0); 462 if (err) 463 device_printf(bus->bdev, "Could not configure root HUB\n"); 464 465 usbd_enum_unlock(udev); 466 467 USB_BUS_LOCK(bus); 468 } 469 470 /*------------------------------------------------------------------------* 471 * usb_bus_shutdown 472 * 473 * This function is used to shutdown the USB contoller. 474 *------------------------------------------------------------------------*/ 475 static void 476 usb_bus_shutdown(struct usb_proc_msg *pm) 477 { 478 struct usb_bus *bus; 479 struct usb_device *udev; 480 usb_error_t err; 481 482 bus = ((struct usb_bus_msg *)pm)->bus; 483 udev = bus->devices[USB_ROOT_HUB_ADDR]; 484 485 if (udev == NULL || bus->bdev == NULL) 486 return; 487 488 USB_BUS_UNLOCK(bus); 489 490 bus_generic_shutdown(bus->bdev); 491 492 usbd_enum_lock(udev); 493 494 err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX); 495 if (err) 496 device_printf(bus->bdev, "Could not unconfigure root HUB\n"); 497 498 USB_BUS_LOCK(bus); 499 bus->hw_power_state = 0; 500 bus->no_explore = 1; 501 USB_BUS_UNLOCK(bus); 502 503 if (bus->methods->set_hw_power != NULL) 504 (bus->methods->set_hw_power) (bus); 505 506 if (bus->methods->set_hw_power_sleep != NULL) 507 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SHUTDOWN); 508 509 usbd_enum_unlock(udev); 510 511 USB_BUS_LOCK(bus); 512 } 513 514 static void 515 usb_power_wdog(void *arg) 516 { 517 struct usb_bus *bus = arg; 518 519 USB_BUS_LOCK_ASSERT(bus, MA_OWNED); 520 521 usb_callout_reset(&bus->power_wdog, 522 4 * hz, usb_power_wdog, arg); 523 524 #ifdef DDB 525 /* 526 * The following line of code is only here to recover from 527 * DDB: 528 */ 529 usb_proc_rewakeup(&bus->explore_proc); /* recover from DDB */ 530 #endif 531 532 #if USB_HAVE_POWERD 533 USB_BUS_UNLOCK(bus); 534 535 usb_bus_power_update(bus); 536 537 USB_BUS_LOCK(bus); 538 #endif 539 } 540 541 /*------------------------------------------------------------------------* 542 * usb_bus_attach 543 * 544 * This function attaches USB in context of the explore thread. 545 *------------------------------------------------------------------------*/ 546 static void 547 usb_bus_attach(struct usb_proc_msg *pm) 548 { 549 struct usb_bus *bus; 550 struct usb_device *child; 551 device_t dev; 552 usb_error_t err; 553 enum usb_dev_speed speed; 554 555 bus = ((struct usb_bus_msg *)pm)->bus; 556 dev = bus->bdev; 557 558 DPRINTF("\n"); 559 560 switch (bus->usbrev) { 561 case USB_REV_1_0: 562 speed = USB_SPEED_FULL; 563 device_printf(bus->bdev, "12Mbps Full Speed USB v1.0\n"); 564 break; 565 566 case USB_REV_1_1: 567 speed = USB_SPEED_FULL; 568 device_printf(bus->bdev, "12Mbps Full Speed USB v1.1\n"); 569 break; 570 571 case USB_REV_2_0: 572 speed = USB_SPEED_HIGH; 573 device_printf(bus->bdev, "480Mbps High Speed USB v2.0\n"); 574 break; 575 576 case USB_REV_2_5: 577 speed = USB_SPEED_VARIABLE; 578 device_printf(bus->bdev, "480Mbps Wireless USB v2.5\n"); 579 break; 580 581 case USB_REV_3_0: 582 speed = USB_SPEED_SUPER; 583 device_printf(bus->bdev, "5.0Gbps Super Speed USB v3.0\n"); 584 break; 585 586 default: 587 device_printf(bus->bdev, "Unsupported USB revision\n"); 588 usb_root_mount_rel(bus); 589 return; 590 } 591 592 /* default power_mask value */ 593 bus->hw_power_state = 594 USB_HW_POWER_CONTROL | 595 USB_HW_POWER_BULK | 596 USB_HW_POWER_INTERRUPT | 597 USB_HW_POWER_ISOC | 598 USB_HW_POWER_NON_ROOT_HUB; 599 600 USB_BUS_UNLOCK(bus); 601 602 /* make sure power is set at least once */ 603 604 if (bus->methods->set_hw_power != NULL) { 605 (bus->methods->set_hw_power) (bus); 606 } 607 608 /* allocate the Root USB device */ 609 610 child = usb_alloc_device(bus->bdev, bus, NULL, 0, 0, 1, 611 speed, USB_MODE_HOST); 612 if (child) { 613 err = usb_probe_and_attach(child, 614 USB_IFACE_INDEX_ANY); 615 if (!err) { 616 if ((bus->devices[USB_ROOT_HUB_ADDR] == NULL) || 617 (bus->devices[USB_ROOT_HUB_ADDR]->hub == NULL)) { 618 err = USB_ERR_NO_ROOT_HUB; 619 } 620 } 621 } else { 622 err = USB_ERR_NOMEM; 623 } 624 625 USB_BUS_LOCK(bus); 626 627 if (err) { 628 device_printf(bus->bdev, "Root HUB problem, error=%s\n", 629 usbd_errstr(err)); 630 usb_root_mount_rel(bus); 631 } 632 633 /* set softc - we are ready */ 634 device_set_softc(dev, bus); 635 636 /* start watchdog */ 637 usb_power_wdog(bus); 638 } 639 640 /*------------------------------------------------------------------------* 641 * usb_attach_sub 642 * 643 * This function creates a thread which runs the USB attach code. 644 *------------------------------------------------------------------------*/ 645 static void 646 usb_attach_sub(device_t dev, struct usb_bus *bus) 647 { 648 const char *pname = device_get_nameunit(dev); 649 650 mtx_lock(&Giant); 651 if (usb_devclass_ptr == NULL) 652 usb_devclass_ptr = devclass_find("usbus"); 653 mtx_unlock(&Giant); 654 655 #if USB_HAVE_PF 656 usbpf_attach(bus); 657 #endif 658 /* Initialise USB process messages */ 659 bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore; 660 bus->explore_msg[0].bus = bus; 661 bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore; 662 bus->explore_msg[1].bus = bus; 663 664 bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach; 665 bus->detach_msg[0].bus = bus; 666 bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach; 667 bus->detach_msg[1].bus = bus; 668 669 bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach; 670 bus->attach_msg[0].bus = bus; 671 bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach; 672 bus->attach_msg[1].bus = bus; 673 674 bus->suspend_msg[0].hdr.pm_callback = &usb_bus_suspend; 675 bus->suspend_msg[0].bus = bus; 676 bus->suspend_msg[1].hdr.pm_callback = &usb_bus_suspend; 677 bus->suspend_msg[1].bus = bus; 678 679 bus->resume_msg[0].hdr.pm_callback = &usb_bus_resume; 680 bus->resume_msg[0].bus = bus; 681 bus->resume_msg[1].hdr.pm_callback = &usb_bus_resume; 682 bus->resume_msg[1].bus = bus; 683 684 bus->shutdown_msg[0].hdr.pm_callback = &usb_bus_shutdown; 685 bus->shutdown_msg[0].bus = bus; 686 bus->shutdown_msg[1].hdr.pm_callback = &usb_bus_shutdown; 687 bus->shutdown_msg[1].bus = bus; 688 689 /* Create USB explore and callback processes */ 690 691 if (usb_proc_create(&bus->giant_callback_proc, 692 &bus->bus_mtx, pname, USB_PRI_MED)) { 693 device_printf(dev, "WARNING: Creation of USB Giant " 694 "callback process failed.\n"); 695 } else if (usb_proc_create(&bus->non_giant_callback_proc, 696 &bus->bus_mtx, pname, USB_PRI_HIGH)) { 697 device_printf(dev, "WARNING: Creation of USB non-Giant " 698 "callback process failed.\n"); 699 } else if (usb_proc_create(&bus->explore_proc, 700 &bus->bus_mtx, pname, USB_PRI_MED)) { 701 device_printf(dev, "WARNING: Creation of USB explore " 702 "process failed.\n"); 703 } else if (usb_proc_create(&bus->control_xfer_proc, 704 &bus->bus_mtx, pname, USB_PRI_MED)) { 705 device_printf(dev, "WARNING: Creation of USB control transfer " 706 "process failed.\n"); 707 } else { 708 /* Get final attach going */ 709 USB_BUS_LOCK(bus); 710 usb_proc_msignal(&bus->explore_proc, 711 &bus->attach_msg[0], &bus->attach_msg[1]); 712 USB_BUS_UNLOCK(bus); 713 714 /* Do initial explore */ 715 usb_needs_explore(bus, 1); 716 } 717 } 718 719 SYSUNINIT(usb_bus_unload, SI_SUB_KLD, SI_ORDER_ANY, usb_bus_unload, NULL); 720 721 /*------------------------------------------------------------------------* 722 * usb_bus_mem_flush_all_cb 723 *------------------------------------------------------------------------*/ 724 #if USB_HAVE_BUSDMA 725 static void 726 usb_bus_mem_flush_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 727 struct usb_page *pg, usb_size_t size, usb_size_t align) 728 { 729 usb_pc_cpu_flush(pc); 730 } 731 #endif 732 733 /*------------------------------------------------------------------------* 734 * usb_bus_mem_flush_all - factored out code 735 *------------------------------------------------------------------------*/ 736 #if USB_HAVE_BUSDMA 737 void 738 usb_bus_mem_flush_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 739 { 740 if (cb) { 741 cb(bus, &usb_bus_mem_flush_all_cb); 742 } 743 } 744 #endif 745 746 /*------------------------------------------------------------------------* 747 * usb_bus_mem_alloc_all_cb 748 *------------------------------------------------------------------------*/ 749 #if USB_HAVE_BUSDMA 750 static void 751 usb_bus_mem_alloc_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 752 struct usb_page *pg, usb_size_t size, usb_size_t align) 753 { 754 /* need to initialize the page cache */ 755 pc->tag_parent = bus->dma_parent_tag; 756 757 if (usb_pc_alloc_mem(pc, pg, size, align)) { 758 bus->alloc_failed = 1; 759 } 760 } 761 #endif 762 763 /*------------------------------------------------------------------------* 764 * usb_bus_mem_alloc_all - factored out code 765 * 766 * Returns: 767 * 0: Success 768 * Else: Failure 769 *------------------------------------------------------------------------*/ 770 uint8_t 771 usb_bus_mem_alloc_all(struct usb_bus *bus, bus_dma_tag_t dmat, 772 usb_bus_mem_cb_t *cb) 773 { 774 bus->alloc_failed = 0; 775 776 mtx_init(&bus->bus_mtx, device_get_nameunit(bus->parent), 777 NULL, MTX_DEF | MTX_RECURSE); 778 779 usb_callout_init_mtx(&bus->power_wdog, 780 &bus->bus_mtx, 0); 781 782 TAILQ_INIT(&bus->intr_q.head); 783 784 #if USB_HAVE_BUSDMA 785 usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags, 786 dmat, &bus->bus_mtx, NULL, 32, USB_BUS_DMA_TAG_MAX); 787 #endif 788 if ((bus->devices_max > USB_MAX_DEVICES) || 789 (bus->devices_max < USB_MIN_DEVICES) || 790 (bus->devices == NULL)) { 791 DPRINTFN(0, "Devices field has not been " 792 "initialised properly\n"); 793 bus->alloc_failed = 1; /* failure */ 794 } 795 #if USB_HAVE_BUSDMA 796 if (cb) { 797 cb(bus, &usb_bus_mem_alloc_all_cb); 798 } 799 #endif 800 if (bus->alloc_failed) { 801 usb_bus_mem_free_all(bus, cb); 802 } 803 return (bus->alloc_failed); 804 } 805 806 /*------------------------------------------------------------------------* 807 * usb_bus_mem_free_all_cb 808 *------------------------------------------------------------------------*/ 809 #if USB_HAVE_BUSDMA 810 static void 811 usb_bus_mem_free_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 812 struct usb_page *pg, usb_size_t size, usb_size_t align) 813 { 814 usb_pc_free_mem(pc); 815 } 816 #endif 817 818 /*------------------------------------------------------------------------* 819 * usb_bus_mem_free_all - factored out code 820 *------------------------------------------------------------------------*/ 821 void 822 usb_bus_mem_free_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 823 { 824 #if USB_HAVE_BUSDMA 825 if (cb) { 826 cb(bus, &usb_bus_mem_free_all_cb); 827 } 828 usb_dma_tag_unsetup(bus->dma_parent_tag); 829 #endif 830 831 mtx_destroy(&bus->bus_mtx); 832 } 833