firmware/usb.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Linus Nielsen Feltzing
  11  *
  12  * iPod driver based on code from the ipodlinux project - http://ipodlinux.org
  13  * Adapted for Rockbox in January 2006
  14  * Original file: podzilla/usb.c
  15  * Copyright (C) 2005 Adam Johnston
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License
  19  * as published by the Free Software Foundation; either version 2
  20  * of the License, or (at your option) any later version.
  21  *
  22  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  23  * KIND, either express or implied.
  24  *
  25  ****************************************************************************/
  26 #include "config.h"
  27 #include "cpu.h"
  28 #include "kernel.h"
  29 #include "thread.h"
  30 #include "system.h"
  31 #include "debug.h"
  32 #include "storage.h"
  33 #include "fat.h"
  34 #include "disk.h"
  35 #include "panic.h"
  36 #include "lcd.h"
  37 #include "usb-target.h"
  38 #include "usb.h"
  39 #include "button.h"
  40 #include "string.h"
  41 #ifdef HAVE_USBSTACK
  42 #include "usb_core.h"
  43 #endif
  44 #include "logf.h"
  45 #include "screendump.h"
  46
  47 /* Conditions under which we want the entire driver */
  48 #if !defined(BOOTLOADER) || (CONFIG_CPU == SH7034) || \
  49      (defined(HAVE_USBSTACK) && defined(HAVE_BOOTLOADER_USB_MODE)) || \
  50      (defined(HAVE_USBSTACK) && (defined(CREATIVE_ZVx))) || \
  51      (defined(HAVE_USBSTACK) && (defined(OLYMPUS_MROBE_500))) || \
  52      (defined(HAVE_USBSTACK) && (defined(IPOD_NANO2G))) || \
  53      defined(CPU_TCC77X) || defined(CPU_TCC780X) || \
  54      (CONFIG_USBOTG == USBOTG_JZ4740) || \
  55      (defined(USE_ROCKBOX_USB) && CONFIG_USBOTG == USBOTG_AS3525) || \
  56      (defined(USE_ROCKBOX_USB) && CONFIG_USBOTG == USBOTG_AS3525v2)
  57 #define USB_FULL_INIT
  58 #endif
  59
  60 #if defined(USB_DETECT_BY_DRV) || defined(USB_DETECT_BY_CORE)
  61 /* These aren't treated differently here */
  62 #define USB_DELAYED_INSERT
  63 #endif
  64
  65 #ifdef HAVE_LCD_BITMAP
  66 bool do_screendump_instead_of_usb = false;
  67 #endif
  68
  69 #if !defined(SIMULATOR) && !defined(USB_NONE)
  70
  71 /* We assume that the USB cable is extracted */
  72 static int usb_state = USB_EXTRACTED;
  73
  74 #if (CONFIG_STORAGE & STORAGE_MMC) && defined(USB_FULL_INIT)
  75 static int usb_mmc_countdown = 0;
  76 #endif
  77
  78 /* Make sure there's enough stack space for screendump */
  79 #ifdef USB_FULL_INIT
  80 static long usb_stack[(DEFAULT_STACK_SIZE + DUMP_BMP_LINESIZE)/sizeof(long)];
  81 static const char usb_thread_name[] = "usb";
  82 static unsigned int usb_thread_entry = 0;
  83 static bool usb_monitor_enabled = false;
  84 #endif /* USB_FULL_INIT */
  85 static struct event_queue usb_queue SHAREDBSS_ATTR;
  86 static bool exclusive_storage_access = false;
  87 #ifdef USB_ENABLE_HID
  88 static bool usb_hid = true;
  89 #endif
  90
  91 #ifdef USB_FULL_INIT
  92
  93 #if defined(USB_FIREWIRE_HANDLING) \
  94     || (defined(HAVE_USBSTACK) && !defined(USE_ROCKBOX_USB))
  95 static void try_reboot(void)
  96 {
  97 #ifdef HAVE_DISK_STORAGE
  98     storage_sleepnow(); /* Immediately spindown the disk. */
  99     sleep(HZ*2);
 100 #endif
 101
 102 #ifdef IPOD_ARCH  /* The following code is based on ipodlinux */
 103 #if CONFIG_CPU == PP5020
 104     memcpy((void *)0x40017f00, "diskmode\0\0hotstuff\0\0\1", 21);
 105 #elif CONFIG_CPU == PP5022
 106     memcpy((void *)0x4001ff00, "diskmode\0\0hotstuff\0\0\1", 21);
 107 #endif /* CONFIG_CPU */
 108 #endif /* IPOD_ARCH */
 109
 110 #ifdef IPOD_NANO2G
 111     memcpy((void *)0x0002bf00, "diskmodehotstuff\1\0\0\0", 20);
 112 #endif
 113
 114     system_reboot(); /* Reboot */
 115 }
 116 #endif /* USB_FIRWIRE_HANDLING || (HAVE_USBSTACK && !USE_ROCKBOX_USB) */
 117
 118
 119 #ifdef HAVE_LCD_BITMAP
 120 static inline bool usb_do_screendump(void)
 121 {
 122     if(do_screendump_instead_of_usb)
 123     {
 124         usb_state = USB_SCREENDUMP;
 125         screen_dump();
 126 #ifdef HAVE_REMOTE_LCD
 127         remote_screen_dump();
 128 #endif
 129         return true;
 130     }
 131
 132     return false;
 133 }
 134 #else /* !HAVE_LCD_BITMAP */
 135 static inline bool usb_do_screendump(void)
 136 {
 137     return false;
 138 }
 139 #endif /* HAVE_LCD_BITMAP */
 140
 141
 142 #ifdef HAVE_USBSTACK
 143
 144 #ifdef HAVE_HOTSWAP
 145 static inline void usb_handle_hotswap(long id)
 146 {
 147     switch(id)
 148     {
 149     case SYS_HOTSWAP_INSERTED:
 150     case SYS_HOTSWAP_EXTRACTED:
 151         usb_core_hotswap_event(1, id == SYS_HOTSWAP_INSERTED);
 152         break;
 153     }
 154     /* Note: No MMC storage handling is needed with the stack atm. */
 155 }
 156 #endif /* HAVE_HOTSWAP */
 157
 158 static inline bool usb_configure_drivers(int for_state)
 159 {
 160     switch(for_state)
 161     {
 162     case USB_POWERED:
 163 #ifdef USB_ENABLE_STORAGE
 164         usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, false);
 165 #endif
 166 #ifdef USB_ENABLE_HID
 167 #ifdef USB_ENABLE_CHARGING_ONLY
 168         usb_core_enable_driver(USB_DRIVER_HID, false);
 169 #else
 170         usb_core_enable_driver(USB_DRIVER_HID, true);
 171 #endif /* USB_ENABLE_CHARGING_ONLY */
 172 #endif /* USB_ENABLE_HID */
 173
 174 #ifdef USB_ENABLE_CHARGING_ONLY
 175         usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, true);
 176 #endif
 177         exclusive_storage_access = false;
 178
 179         usb_attach(); /* Powered only: attach now. */
 180         break;
 181         /* USB_POWERED: */
 182
 183     case USB_INSERTED:
 184 #ifdef USB_ENABLE_STORAGE
 185         usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, true);
 186 #endif
 187 #ifdef USB_ENABLE_HID
 188         usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
 189 #endif
 190 #ifdef USB_ENABLE_CHARGING_ONLY
 191         usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, false);
 192 #endif
 193         /* Check any drivers enabled at this point for exclusive storage
 194          * access requirements. */
 195         exclusive_storage_access = usb_core_any_exclusive_storage();
 196
 197         if(exclusive_storage_access)
 198             return true;
 199
 200         usb_attach(); /* Not exclusive: attach now. */
 201         break;
 202         /* USB_INSERTED: */
 203
 204     case USB_EXTRACTED:
 205         if(exclusive_storage_access)
 206             usb_release_exclusive_storage();
 207         break;
 208         /* USB_EXTRACTED: */
 209     }
 210
 211     return false;
 212 }
 213
 214 #ifdef USE_ROCKBOX_USB
 215 static inline void usb_slave_mode(bool on)
 216 {
 217     int rc;
 218
 219     if(on)
 220     {
 221         trigger_cpu_boost();
 222 #ifdef HAVE_PRIORITY_SCHEDULING
 223         thread_set_priority(thread_self(), PRIORITY_REALTIME);
 224 #endif
 225         disk_unmount_all();
 226         usb_attach();
 227     }
 228     else /* usb_state == USB_INSERTED (only!) */
 229     {
 230         usb_enable(false);
 231 #ifdef HAVE_PRIORITY_SCHEDULING
 232         thread_set_priority(thread_self(), PRIORITY_SYSTEM);
 233 #endif
 234         /* Entered exclusive mode */
 235         rc = disk_mount_all();
 236         if(rc <= 0) /* no partition */
 237             panicf("mount: %d",rc);
 238
 239         cancel_cpu_boost();
 240     }
 241 }
 242 #else /* !USB_ROCKBOX_USB */
 243 static inline void usb_slave_mode(bool on)
 244 {
 245     if(on)
 246     {
 247         /* until we have native mass-storage mode, we want to reboot on
 248            usb host connect */
 249         try_reboot();
 250     }
 251 }
 252 #endif /* USE_ROCKBOX_USB */
 253
 254 void usb_signal_transfer_completion(
 255     struct usb_transfer_completion_event_data* event_data)
 256 {
 257     queue_post(&usb_queue, USB_TRANSFER_COMPLETION, (intptr_t)event_data);
 258 }
 259
 260 #else  /* !HAVE_USBSTACK */
 261
 262 #ifdef HAVE_HOTSWAP
 263 static inline void usb_handle_hotswap(long id)
 264 {
 265 #if (CONFIG_STORAGE & STORAGE_MMC)
 266     switch(id)
 267     {
 268     case SYS_HOTSWAP_INSERTED:
 269     case SYS_HOTSWAP_EXTRACTED:
 270         if(usb_state == USB_INSERTED)
 271         {
 272             usb_enable(false);
 273             usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */
 274         }
 275         break;
 276     case USB_REENABLE:
 277         if(usb_state == USB_INSERTED)
 278             usb_enable(true);  /* reenable only if still inserted */
 279         break;
 280     }
 281 #endif /* STORAGE_MMC */
 282     (void)id;
 283 }
 284 #endif /* HAVE_HOTSWAP */
 285
 286 static inline bool usb_configure_drivers(int for_state)
 287 {
 288     switch(for_state)
 289     {
 290     case USB_POWERED:
 291         exclusive_storage_access = false;
 292         break;
 293     case USB_INSERTED:
 294         exclusive_storage_access = true;
 295         return true;
 296     case USB_EXTRACTED:
 297         if(exclusive_storage_access)
 298             usb_release_exclusive_storage();
 299         break;
 300     }
 301
 302     return false;
 303 }
 304
 305 static inline void usb_slave_mode(bool on)
 306 {
 307     int rc;
 308
 309     if(on)
 310     {
 311         DEBUGF("Entering USB slave mode\n");
 312         disk_unmount_all();
 313         storage_soft_reset();
 314         storage_init();
 315         storage_enable(false);
 316         usb_enable(true);
 317         cpu_idle_mode(true);
 318     }
 319     else
 320     {
 321         DEBUGF("Leaving USB slave mode\n");
 322
 323         cpu_idle_mode(false);
 324
 325         /* Let the ISDx00 settle */
 326         sleep(HZ*1);
 327
 328         usb_enable(false);
 329
 330         rc = storage_init();
 331         if(rc)
 332             panicf("storage: %d",rc);
 333
 334         rc = disk_mount_all();
 335         if(rc <= 0) /* no partition */
 336             panicf("mount: %d",rc);
 337     }
 338 }
 339 #endif /* HAVE_USBSTACK */
 340
 341 #ifdef HAVE_USB_POWER
 342 static inline bool usb_power_button(void)
 343 {
 344 #if (defined(IRIVER_H10) || defined (IRIVER_H10_5GB)) && !defined(USE_ROCKBOX_USB)
 345     return (button_status() & ~USBPOWER_BTN_IGNORE) != USBPOWER_BUTTON;
 346 #else
 347     return (button_status() & ~USBPOWER_BTN_IGNORE) == USBPOWER_BUTTON;
 348 #endif
 349 }
 350
 351 #ifdef USB_FIREWIRE_HANDLING
 352 static inline bool usb_reboot_button(void)
 353 {
 354     return (button_status() & ~USBPOWER_BTN_IGNORE) != USBPOWER_BUTTON;
 355 }
 356 #endif
 357 #else /* !HAVE_USB_POWER */
 358 static inline bool usb_power_button(void)
 359 {
 360     return false;
 361 }
 362
 363 #ifdef USB_FIREWIRE_HANDLING
 364 static inline bool usb_reboot_button(void)
 365 {
 366     return false;
 367 }
 368 #endif
 369 #endif /* HAVE_USB_POWER */
 370
 371 #ifndef USB_DRIVER_CLOSE
 372 static void usb_thread(void) NORETURN_ATTR;
 373 #endif
 374 static void usb_thread(void)
 375 {
 376 #ifdef USB_DELAYED_INSERT
 377     bool host_detected = false;
 378 #endif
 379     int num_acks_to_expect = 0;
 380     long last_broadcast_tick = current_tick;
 381     struct queue_event ev;
 382
 383     while(1)
 384     {
 385         queue_wait(&usb_queue, &ev);
 386         switch(ev.id)
 387         {
 388         /*** Main USB thread duties ***/
 389
 390 #ifdef HAVE_USBSTACK
 391         case USB_TRANSFER_COMPLETION:
 392             usb_core_handle_transfer_completion(
 393                 (struct usb_transfer_completion_event_data*)ev.data);
 394             break;
 395 #endif /* HAVE_USBSTACK */
 396
 397         case USB_INSERTED:
 398 #ifdef USB_DELAYED_INSERT
 399             if(usb_state != USB_POWERED)
 400                 break;
 401
 402             if (host_detected)
 403                 break; /* Drivers configured but we're still USB_POWERED */
 404
 405             host_detected = true;
 406 #else /* !USB_DELAYED_INSERT */
 407             if(usb_state != USB_EXTRACTED)
 408                 break;
 409
 410             if(usb_do_screendump())
 411                 break;
 412
 413             usb_state = USB_POWERED;
 414 #endif /* USB_DELAYED_INSERT */
 415
 416             if(usb_power_button())
 417             {
 418                 /* Only charging is desired */
 419                 usb_configure_drivers(USB_POWERED);
 420                 break;
 421             }
 422
 423             if(!usb_configure_drivers(USB_INSERTED))
 424                 break; /* Exclusive storage access not required */
 425
 426             /* Tell all threads that they have to back off the storage.
 427                We subtract one for our own thread. Expect an ACK for every
 428                listener for each broadcast they received. If it has been too
 429                long, the user might have entered a screen that didn't ACK
 430                when inserting the cable, such as a debugging screen. In that
 431                case, reset the count or else USB would be locked out until
 432                rebooting because it most likely won't ever come. Simply
 433                resetting to the most recent broadcast count is racy. */
 434             if(TIME_AFTER(current_tick, last_broadcast_tick + HZ*5))
 435             {
 436                 num_acks_to_expect = 0;
 437                 last_broadcast_tick = current_tick;
 438             }
 439
 440             num_acks_to_expect += queue_broadcast(SYS_USB_CONNECTED, 0) - 1;
 441             DEBUGF("USB inserted. Waiting for %d acks...\n",
 442                    num_acks_to_expect);
 443
 444             /* Leave the state as USB_POWERED until the expected number of
 445                ACKS are received. */
 446             break;
 447             /* USB_INSERTED: */
 448
 449         case SYS_USB_CONNECTED_ACK:
 450             if(num_acks_to_expect > 0 && --num_acks_to_expect == 0)
 451             {
 452                 DEBUGF("All threads have acknowledged the connect.\n");
 453                 if(usb_state == USB_POWERED)
 454                 {
 455                     usb_slave_mode(true);
 456                     usb_state = USB_INSERTED;
 457                 }
 458             }
 459             else
 460             {
 461                 DEBUGF("usb: got ack, %d to go...\n",
 462                        num_acks_to_expect);
 463             }
 464             break;
 465             /* SYS_USB_CONNECTED_ACK */
 466
 467 #ifdef USB_DELAYED_INSERT
 468         /* In this case, these events handle cable insertion. USB driver or
 469            core determines USB_INSERTED. */
 470         case USB_POWERED:
 471             if(usb_state != USB_EXTRACTED)
 472                 break;
 473
 474             if(usb_do_screendump())
 475                 break;
 476
 477             usb_state = USB_POWERED;
 478             usb_enable(true);
 479             break;
 480             /* USB_POWERED: */
 481
 482         case USB_UNPOWERED:
 483             if(usb_state == USB_POWERED)
 484                 usb_enable(false);
 485             /* Fall-through - other legal states can be USB_INSERTED or
 486                USB_SCREENDUMP */
 487 #endif /* USB_DELAYED_INSERT */
 488         case USB_EXTRACTED:
 489             if(usb_state == USB_EXTRACTED)
 490                 break;
 491
 492             /* Only disable the USB slave mode if we really have enabled
 493                it. Some expected acks may not have been received. */
 494             if(usb_state == USB_INSERTED)
 495                 usb_slave_mode(false);
 496
 497             usb_state = USB_EXTRACTED;
 498
 499             /* Ok to broadcast disconnect now */
 500             usb_configure_drivers(USB_EXTRACTED);
 501 #ifdef USB_DELAYED_INSERT
 502             host_detected = false;
 503 #endif
 504             break;
 505             /* USB_UNPOWERED: USB_EXTRACTED: */
 506
 507         /*** Miscellaneous USB thread duties ***/
 508
 509         /* HOTSWAP */
 510 #ifdef HAVE_HOTSWAP
 511         case SYS_HOTSWAP_INSERTED:
 512         case SYS_HOTSWAP_EXTRACTED:
 513 #if (CONFIG_STORAGE & STORAGE_MMC)
 514         case USB_REENABLE:
 515 #endif
 516             usb_handle_hotswap(ev.id);
 517 #endif
 518
 519         /* FIREWIRE */
 520 #ifdef USB_FIREWIRE_HANDLING
 521         case USB_REQUEST_REBOOT:
 522             if(usb_reboot_button())
 523                 try_reboot();
 524             break;
 525 #endif
 526
 527         /* CHARGING */
 528 #if defined(HAVE_USB_CHARGING_ENABLE) && defined(HAVE_USBSTACK)
 529         case USB_CHARGER_UPDATE:
 530             usb_charging_maxcurrent_change(usb_charging_maxcurrent());
 531             break;
 532 #endif
 533
 534         /* CLOSE */
 535 #ifdef USB_DRIVER_CLOSE
 536         case USB_QUIT:
 537             return;
 538 #endif
 539         } /* switch */
 540     } /* while */
 541 }
 542
 543 #if defined(HAVE_USB_CHARGING_ENABLE) && defined(HAVE_USBSTACK)
 544 void usb_charger_update(void)
 545 {
 546     queue_post(&usb_queue, USB_CHARGER_UPDATE, 0);
 547 }
 548 #endif
 549
 550 #ifdef USB_STATUS_BY_EVENT
 551 void usb_status_event(int current_status)
 552 {
 553     /* Caller isn't expected to filter for changes in status.
 554      * current_status:
 555      *   USB_DETECT_BY_DRV/CORE: USB_POWERED, USB_UNPOWERED,
 556                                  USB_INSERTED (driver/core)
 557      *                     else: USB_INSERTED, USB_EXTRACTED
 558      */
 559     if(usb_monitor_enabled)
 560     {
 561         int oldstatus = disable_irq_save(); /* Dual-use function */
 562         queue_remove_from_head(&usb_queue, current_status);
 563         queue_post(&usb_queue, current_status, 0);
 564         restore_irq(oldstatus);
 565     }
 566 }
 567
 568 void usb_start_monitoring(void)
 569 {
 570     int oldstatus = disable_irq_save(); /* Sync to event */
 571     int status = usb_detect();
 572
 573     usb_monitor_enabled = true;
 574
 575     /* An event may have been missed because it was sent before monitoring
 576      * was enabled due to the connector already having been inserted before
 577      * before or during boot. */
 578 #ifdef USB_DELAYED_INSERT
 579     /* Filter the status - USB_INSERTED may happen later */
 580     status = (status == USB_EXTRACTED) ? USB_UNPOWERED : USB_POWERED;
 581 #endif
 582     usb_status_event(status);
 583
 584 #ifdef USB_FIREWIRE_HANDLING
 585     if(firewire_detect())
 586         usb_firewire_connect_event();
 587 #endif
 588
 589     restore_irq(oldstatus);
 590 }
 591
 592 #ifdef USB_FIREWIRE_HANDLING
 593 void usb_firewire_connect_event(void)
 594 {
 595     queue_post(&usb_queue, USB_REQUEST_REBOOT, 0);
 596 }
 597 #endif /* USB_FIREWIRE_HANDLING */
 598
 599 #else /* !USB_STATUS_BY_EVENT */
 600
 601 static void usb_tick(void)
 602 {
 603     #define NUM_POLL_READINGS (HZ/5)
 604     static int usb_countdown = -1;
 605     static int last_usb_status = USB_EXTRACTED;
 606 #ifdef USB_FIREWIRE_HANDLING
 607     static int firewire_countdown = -1;
 608     static int last_firewire_status = false;
 609 #endif
 610
 611     if(usb_monitor_enabled)
 612     {
 613 #ifdef USB_FIREWIRE_HANDLING
 614         int current_firewire_status = firewire_detect();
 615         if(current_firewire_status != last_firewire_status)
 616         {
 617             last_firewire_status = current_firewire_status;
 618             firewire_countdown = NUM_POLL_READINGS;
 619         }
 620         else
 621         {
 622             /* Count down until it gets negative */
 623             if(firewire_countdown >= 0)
 624                 firewire_countdown--;
 625
 626             /* Report to the thread if we have had 3 identical status
 627                readings in a row */
 628             if(firewire_countdown == 0)
 629             {
 630                 queue_post(&usb_queue, USB_REQUEST_REBOOT, 0);
 631             }
 632         }
 633 #endif /* USB_FIREWIRE_HANDLING */
 634
 635         int current_status = usb_detect();
 636
 637         /* Only report when the status has changed */
 638         if(current_status != last_usb_status)
 639         {
 640             last_usb_status = current_status;
 641             usb_countdown = NUM_POLL_READINGS;
 642         }
 643         else
 644         {
 645             /* Count down until it gets negative */
 646             if(usb_countdown >= 0)
 647                 usb_countdown--;
 648
 649             /* Report to the thread if we have had 3 identical status
 650                readings in a row */
 651             if(usb_countdown == 0)
 652             {
 653                 queue_post(&usb_queue, current_status, 0);
 654             }
 655         }
 656     }
 657 #if (CONFIG_STORAGE & STORAGE_MMC)
 658     if(usb_mmc_countdown > 0)
 659     {
 660         usb_mmc_countdown--;
 661         if(usb_mmc_countdown == 0)
 662             queue_post(&usb_queue, USB_REENABLE, 0);
 663     }
 664 #endif
 665 }
 666
 667 void usb_start_monitoring(void)
 668 {
 669     usb_monitor_enabled = true;
 670 }
 671 #endif /* USB_STATUS_BY_EVENT */
 672 #endif /* USB_FULL_INIT */
 673
 674 void usb_acknowledge(long id)
 675 {
 676     queue_post(&usb_queue, id, 0);
 677 }
 678
 679 void usb_init(void)
 680 {
 681     usb_init_device();
 682
 683 #ifdef USB_FULL_INIT
 684     usb_enable(false);
 685
 686     queue_init(&usb_queue, true);
 687
 688     usb_thread_entry = create_thread(usb_thread, usb_stack,
 689                        sizeof(usb_stack), 0, usb_thread_name
 690                        IF_PRIO(, PRIORITY_SYSTEM) IF_COP(, CPU));
 691
 692 #ifndef USB_STATUS_BY_EVENT
 693     tick_add_task(usb_tick);
 694 #endif
 695 #endif /* USB_FULL_INIT */
 696 }
 697
 698 void usb_wait_for_disconnect(struct event_queue *q)
 699 {
 700 #ifdef USB_FULL_INIT
 701     struct queue_event ev;
 702
 703     /* Don't return until we get SYS_USB_DISCONNECTED */
 704     while(1)
 705     {
 706         queue_wait(q, &ev);
 707         if(ev.id == SYS_USB_DISCONNECTED)
 708             return;
 709     }
 710 #endif /* USB_FULL_INIT */
 711     (void)q;
 712 }
 713
 714 int usb_wait_for_disconnect_w_tmo(struct event_queue *q, int ticks)
 715 {
 716 #ifdef USB_FULL_INIT
 717     struct queue_event ev;
 718
 719     /* Don't return until we get SYS_USB_DISCONNECTED or SYS_TIMEOUT */
 720     while(1)
 721     {
 722         queue_wait_w_tmo(q, &ev, ticks);
 723         switch(ev.id)
 724         {
 725             case SYS_USB_DISCONNECTED:
 726                 return 0;
 727             case SYS_TIMEOUT:
 728                 return 1;
 729         }
 730     }
 731 #endif /* USB_FULL_INIT */
 732     (void)q; (void)ticks;
 733     return 0;
 734 }
 735
 736 #ifdef USB_DRIVER_CLOSE
 737 void usb_close(void)
 738 {
 739     unsigned int thread = usb_thread_entry;
 740     usb_thread_entry = 0;
 741
 742     if(thread == 0)
 743         return;
 744
 745 #ifndef USB_STATUS_BY_EVENT
 746     tick_remove_task(usb_tick);
 747 #endif
 748     usb_monitor_enabled = false;
 749
 750     queue_post(&usb_queue, USB_QUIT, 0);
 751     thread_wait(thread);
 752 }
 753 #endif /* USB_DRIVER_CLOSE */
 754
 755 bool usb_inserted(void)
 756 {
 757     return usb_state == USB_INSERTED || usb_state == USB_POWERED;
 758 }
 759
 760 #ifdef HAVE_USBSTACK
 761 bool usb_exclusive_storage(void)
 762 {
 763     /* Storage isn't actually exclusive until slave mode has been entered */
 764     return exclusive_storage_access && usb_state == USB_INSERTED;
 765 }
 766 #endif /* HAVE_USBSTACK */
 767
 768 int usb_release_exclusive_storage(void)
 769 {
 770     int bccount;
 771     exclusive_storage_access = false;
 772     /* Tell all threads that we are back in business */
 773     bccount = queue_broadcast(SYS_USB_DISCONNECTED, 0) - 1;
 774     DEBUGF("USB extracted. Broadcast to %d threads...\n", bccount);
 775     return bccount;
 776 }
 777
 778 #ifdef HAVE_USB_POWER
 779 bool usb_powered(void)
 780 {
 781     return usb_state == USB_POWERED;
 782 }
 783 #endif /* HAVE_USB_POWER */
 784
 785 #ifdef USB_ENABLE_HID
 786 void usb_set_hid(bool enable)
 787 {
 788     usb_hid = enable;
 789     usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
 790 }
 791 #endif /* USB_ENABLE_HID */
 792
 793 #else /* SIMULATOR || USB_NONE */
 794
 795 #ifdef USB_NONE
 796 bool usb_inserted(void)
 797 {
 798     return false;
 799 }
 800 #endif /* USB_NONE */
 801
 802 /* Dummy simulator functions */
 803 void usb_acknowledge(long id)
 804 {
 805     id = id;
 806 }
 807
 808 void usb_init(void)
 809 {
 810 }
 811
 812 void usb_start_monitoring(void)
 813 {
 814 }
 815
 816 int usb_detect(void)
 817 {
 818     return USB_EXTRACTED;
 819 }
 820
 821 void usb_wait_for_disconnect(struct event_queue *q)
 822 {
 823    (void)q;
 824 }
 825
 826 #endif /* !USB_NONE && !SIMULATOR */