summaryrefslogtreecommitdiffstats
path: root/firmware/usb.c
blob: 4e71c0611908901ad6cc99da258b6cc3152e7051 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by Linus Nielsen Feltzing
 *
 * iPod driver based on code from the ipodlinux project - http://ipodlinux.org
 * Adapted for Rockbox in January 2006
 * Original file: podzilla/usb.c
 * Copyright (C) 2005 Adam Johnston
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "system.h"
#include "debug.h"
#include "storage.h"
#include "fat.h"
#include "disk.h"
#include "panic.h"
#include "lcd.h"
#include "usb-target.h"
#include "usb.h"
#include "button.h"
#include "string.h"
#ifdef HAVE_USBSTACK
#include "usb_core.h"
#endif
#include "logf.h"
#include "screendump.h"

/* Conditions under which we want the entire driver */
#if !defined(BOOTLOADER) || (CONFIG_CPU == SH7034) || \
     (defined(HAVE_USBSTACK) && defined(HAVE_BOOTLOADER_USB_MODE)) || \
     (defined(HAVE_USBSTACK) && (defined(CREATIVE_ZVx))) || \
     (defined(HAVE_USBSTACK) && (defined(OLYMPUS_MROBE_500))) || \
     (defined(HAVE_USBSTACK) && (defined(IPOD_NANO2G))) || \
     defined(CPU_TCC77X) || defined(CPU_TCC780X) || \
     (CONFIG_USBOTG == USBOTG_JZ4740) || \
     (defined(USE_ROCKBOX_USB) && CONFIG_USBOTG == USBOTG_AS3525) || \
     (defined(USE_ROCKBOX_USB) && CONFIG_USBOTG == USBOTG_AS3525v2)
#define USB_FULL_INIT
#endif

#ifdef HAVE_LCD_BITMAP
bool do_screendump_instead_of_usb = false;
#endif

#if !defined(SIMULATOR) && !defined(USB_NONE)

/* We assume that the USB cable is extracted */
static int usb_state = USB_EXTRACTED;

#if (CONFIG_STORAGE & STORAGE_MMC) && defined(USB_FULL_INIT) && !defined(HAVE_USBSTACK)
static int usb_mmc_countdown = 0;
#endif

/* Make sure there's enough stack space for screendump */
#ifdef USB_FULL_INIT
static long usb_stack[(DEFAULT_STACK_SIZE + DUMP_BMP_LINESIZE)/sizeof(long)];
static const char usb_thread_name[] = "usb";
static unsigned int usb_thread_entry = 0;
static bool usb_monitor_enabled = false;
#endif /* USB_FULL_INIT */
static struct event_queue usb_queue SHAREDBSS_ATTR;
static bool exclusive_storage_access = false;
#ifdef USB_ENABLE_HID
static bool usb_hid = true;
#endif

#ifdef USB_FULL_INIT

#if defined(USB_FIREWIRE_HANDLING) \
    || (defined(HAVE_USBSTACK) && !defined(USE_ROCKBOX_USB))
static void try_reboot(void)
{
#ifdef HAVE_DISK_STORAGE
    storage_sleepnow(); /* Immediately spindown the disk. */
    sleep(HZ*2);
#endif

#ifdef IPOD_ARCH  /* The following code is based on ipodlinux */
#if CONFIG_CPU == PP5020
    memcpy((void *)0x40017f00, "diskmode\0\0hotstuff\0\0\1", 21);
#elif CONFIG_CPU == PP5022
    memcpy((void *)0x4001ff00, "diskmode\0\0hotstuff\0\0\1", 21);
#endif /* CONFIG_CPU */
#endif /* IPOD_ARCH */

#ifdef IPOD_NANO2G
    memcpy((void *)0x0002bf00, "diskmodehotstuff\1\0\0\0", 20);
#endif

    system_reboot(); /* Reboot */
}
#endif /* USB_FIRWIRE_HANDLING || (HAVE_USBSTACK && !USE_ROCKBOX_USB) */


#ifdef HAVE_LCD_BITMAP
static inline bool usb_do_screendump(void)
{
    if(do_screendump_instead_of_usb)
    {
        usb_state = USB_SCREENDUMP;
        screen_dump();
#ifdef HAVE_REMOTE_LCD
        remote_screen_dump();
#endif
        return true;
    }

    return false;
}
#else /* !HAVE_LCD_BITMAP */
static inline bool usb_do_screendump(void)
{
    return false;
}
#endif /* HAVE_LCD_BITMAP */


#ifdef HAVE_USBSTACK

#ifdef HAVE_HOTSWAP
static inline void usb_handle_hotswap(long id)
{
    switch(id)
    {
    case SYS_HOTSWAP_INSERTED:
    case SYS_HOTSWAP_EXTRACTED:
        usb_core_hotswap_event(1, id == SYS_HOTSWAP_INSERTED);
        break;
    }
    /* Note: No MMC storage handling is needed with the stack atm. */
}
#endif /* HAVE_HOTSWAP */

static inline bool usb_configure_drivers(int for_state)
{
    switch(for_state)
    {
    case USB_POWERED:
#ifdef USB_ENABLE_STORAGE
        usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, false);
#endif
#ifdef USB_ENABLE_HID
#ifdef USB_ENABLE_CHARGING_ONLY
        usb_core_enable_driver(USB_DRIVER_HID, false);
#else
        usb_core_enable_driver(USB_DRIVER_HID, true);
#endif /* USB_ENABLE_CHARGING_ONLY */
#endif /* USB_ENABLE_HID */

#ifdef USB_ENABLE_CHARGING_ONLY
        usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, true);
#endif
        exclusive_storage_access = false;

        usb_attach(); /* Powered only: attach now. */
        break;
        /* USB_POWERED: */
    
    case USB_INSERTED:
#ifdef USB_ENABLE_STORAGE
        usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, true);
#endif
#ifdef USB_ENABLE_HID
        usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
#endif
#ifdef USB_ENABLE_CHARGING_ONLY
        usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, false);
#endif
        /* Check any drivers enabled at this point for exclusive storage
         * access requirements. */
        exclusive_storage_access = usb_core_any_exclusive_storage();

        if(exclusive_storage_access)
            return true;

        usb_attach(); /* Not exclusive: attach now. */
        break;
        /* USB_INSERTED: */

    case USB_EXTRACTED:
        if(exclusive_storage_access)
            usb_release_exclusive_storage();
        break;
        /* USB_EXTRACTED: */
    }

    return false;
}

#ifdef USE_ROCKBOX_USB
static inline void usb_slave_mode(bool on)
{
    int rc;

    if(on)
    {
        trigger_cpu_boost();
#ifdef HAVE_PRIORITY_SCHEDULING
        thread_set_priority(thread_self(), PRIORITY_REALTIME);
#endif
        disk_unmount_all();
        usb_attach();
    }
    else /* usb_state == USB_INSERTED (only!) */
    {
        usb_enable(false);
#ifdef HAVE_PRIORITY_SCHEDULING
        thread_set_priority(thread_self(), PRIORITY_SYSTEM);
#endif
        /* Entered exclusive mode */
        rc = disk_mount_all();
        if(rc <= 0) /* no partition */
            panicf("mount: %d",rc);

        cancel_cpu_boost();
    }
}
#else /* !USB_ROCKBOX_USB */
static inline void usb_slave_mode(bool on)
{
    if(on)
    {
        /* until we have native mass-storage mode, we want to reboot on
           usb host connect */
        try_reboot();
    }
}
#endif /* USE_ROCKBOX_USB */

void usb_signal_transfer_completion(
    struct usb_transfer_completion_event_data* event_data)
{
    queue_post(&usb_queue, USB_TRANSFER_COMPLETION, (intptr_t)event_data);
}

#else  /* !HAVE_USBSTACK */

#ifdef HAVE_HOTSWAP
static inline void usb_handle_hotswap(long id)
{
#if (CONFIG_STORAGE & STORAGE_MMC)
    switch(id)
    {
    case SYS_HOTSWAP_INSERTED:
    case SYS_HOTSWAP_EXTRACTED:
        if(usb_state == USB_INSERTED)
        {
            usb_enable(false);
            usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */
        }
        break;
    case USB_REENABLE:
        if(usb_state == USB_INSERTED)
            usb_enable(true);  /* reenable only if still inserted */
        break;
    }
#endif /* STORAGE_MMC */
    (void)id;
}
#endif /* HAVE_HOTSWAP */

static inline bool usb_configure_drivers(int for_state)
{
    switch(for_state)
    {
    case USB_POWERED:
        exclusive_storage_access = false;
        break;
    case USB_INSERTED:
        exclusive_storage_access = true;
        return true;
    case USB_EXTRACTED:
        if(exclusive_storage_access)
            usb_release_exclusive_storage();
        break;
    }

    return false;
}

static inline void usb_slave_mode(bool on)
{
    int rc;

    if(on)
    {
        DEBUGF("Entering USB slave mode\n");
        disk_unmount_all();
        storage_soft_reset();
        storage_init();
        storage_enable(false);
        usb_enable(true);
        cpu_idle_mode(true);
    }
    else
    {
        DEBUGF("Leaving USB slave mode\n");

        cpu_idle_mode(false);

        /* Let the ISDx00 settle */
        sleep(HZ*1);

        usb_enable(false);

        rc = storage_init();
        if(rc)
            panicf("storage: %d",rc);

        sleep(HZ/10);
        rc = disk_mount_all();
        if(rc <= 0) /* no partition */
            panicf("mount: %d",rc);
    }
}
#endif /* HAVE_USBSTACK */

#ifdef HAVE_USB_POWER
static inline bool usb_power_button(void)
{
    return (button_status() & ~USBPOWER_BTN_IGNORE);
}

#ifdef USB_FIREWIRE_HANDLING
static inline bool usb_reboot_button(void)
{
    return (button_status() & ~USBPOWER_BTN_IGNORE);
}
#endif
#else /* !HAVE_USB_POWER */
static inline bool usb_power_button(void)
{
    return false;
}

#ifdef USB_FIREWIRE_HANDLING
static inline bool usb_reboot_button(void)
{
    return false;
}
#endif
#endif /* HAVE_USB_POWER */

#ifndef USB_DRIVER_CLOSE
static void usb_thread(void) NORETURN_ATTR;
#endif
static void usb_thread(void)
{
#ifdef USB_DETECT_BY_CORE
    bool host_detected = false;
#endif
    int num_acks_to_expect = 0;
    long last_broadcast_tick = current_tick;
    struct queue_event ev;

    while(1)
    {
        queue_wait(&usb_queue, &ev);
        switch(ev.id)
        {
        /*** Main USB thread duties ***/

#ifdef HAVE_USBSTACK
        case USB_TRANSFER_COMPLETION:
            usb_core_handle_transfer_completion(
                (struct usb_transfer_completion_event_data*)ev.data);
            break;
#endif /* HAVE_USBSTACK */

        case USB_INSERTED:
#ifdef USB_DETECT_BY_CORE
            if(usb_state != USB_POWERED)
                break;

            if (host_detected)
                break; /* Drivers configured but we're still USB_POWERED */

            host_detected = true;
#else /* !USB_DETECT_BY_CORE */
            if(usb_state != USB_EXTRACTED)
                break;

            if(usb_do_screendump())
                break;

            usb_state = USB_POWERED;
#endif /* USB_DETECT_BY_CORE */

            if(usb_power_button())
            {
                /* Only charging is desired */
                usb_configure_drivers(USB_POWERED);
                break;
            }

            if(!usb_configure_drivers(USB_INSERTED))
                break; /* Exclusive storage access not required */

            /* Tell all threads that they have to back off the storage.
               We subtract one for our own thread. Expect an ACK for every
               listener for each broadcast they received. If it has been too
               long, the user might have entered a screen that didn't ACK
               when inserting the cable, such as a debugging screen. In that
               case, reset the count or else USB would be locked out until
               rebooting because it most likely won't ever come. Simply
               resetting to the most recent broadcast count is racy. */
            if(TIME_AFTER(current_tick, last_broadcast_tick + HZ*5))
            {
                num_acks_to_expect = 0;
                last_broadcast_tick = current_tick;
            }

            num_acks_to_expect += queue_broadcast(SYS_USB_CONNECTED, 0) - 1;
            DEBUGF("USB inserted. Waiting for %d acks...\n",
                   num_acks_to_expect);

            /* Leave the state as USB_POWERED until the expected number of
               ACKS are received. */
            break;
            /* USB_INSERTED: */

        case SYS_USB_CONNECTED_ACK:
            if(num_acks_to_expect > 0 && --num_acks_to_expect == 0)
            {
                DEBUGF("All threads have acknowledged the connect.\n");
                if(usb_state == USB_POWERED)
                {
                    usb_slave_mode(true);
                    usb_state = USB_INSERTED;
                }
            }
            else
            {
                DEBUGF("usb: got ack, %d to go...\n",
                       num_acks_to_expect);
            }
            break;
            /* SYS_USB_CONNECTED_ACK */

#ifdef USB_DETECT_BY_CORE
        /* In this case, these events handle cable insertion. USB driver or
           core determines USB_INSERTED. */
        case USB_POWERED:
            if(usb_state != USB_EXTRACTED)
                break;

            if(usb_do_screendump())
                break;

            usb_state = USB_POWERED;
            usb_enable(true);
            break;
            /* USB_POWERED: */

        case USB_UNPOWERED:
            if(usb_state == USB_POWERED)
                usb_enable(false);
            /* Fall-through - other legal states can be USB_INSERTED or
               USB_SCREENDUMP */
#endif /* USB_DETECT_BY_CORE */
        case USB_EXTRACTED:
            if(usb_state == USB_EXTRACTED)
                break;

            /* Only disable the USB slave mode if we really have enabled
               it. Some expected acks may not have been received. */
            if(usb_state == USB_INSERTED)
                usb_slave_mode(false);

            usb_state = USB_EXTRACTED;

            /* Ok to broadcast disconnect now */
            usb_configure_drivers(USB_EXTRACTED);
#ifdef USB_DETECT_BY_CORE
            host_detected = false;
#endif
            break;
            /* USB_UNPOWERED: USB_EXTRACTED: */

        /*** Miscellaneous USB thread duties ***/

        /* HOTSWAP */
#ifdef HAVE_HOTSWAP
        case SYS_HOTSWAP_INSERTED:
        case SYS_HOTSWAP_EXTRACTED:
#if (CONFIG_STORAGE & STORAGE_MMC)
        case USB_REENABLE:
#endif
            usb_handle_hotswap(ev.id);
            break;
#endif

        /* FIREWIRE */
#ifdef USB_FIREWIRE_HANDLING
        case USB_REQUEST_REBOOT:
            if(usb_reboot_button())
                try_reboot();
            break;
#endif

        /* CHARGING */
#if defined(HAVE_USB_CHARGING_ENABLE) && defined(HAVE_USBSTACK)
        case USB_CHARGER_UPDATE:
            usb_charging_maxcurrent_change(usb_charging_maxcurrent());
            break;
#endif

        /* CLOSE */
#ifdef USB_DRIVER_CLOSE
        case USB_QUIT:
            return;
#endif
        } /* switch */
    } /* while */
}

#if defined(HAVE_USB_CHARGING_ENABLE) && defined(HAVE_USBSTACK)
void usb_charger_update(void)
{
    queue_post(&usb_queue, USB_CHARGER_UPDATE, 0);
}
#endif

#ifdef USB_STATUS_BY_EVENT
void usb_status_event(int current_status)
{
    /* Caller isn't expected to filter for changes in status.
     * current_status:
     *   USB_DETECT_BY_CORE: USB_POWERED, USB_UNPOWERED,
                             USB_INSERTED (core)
     *                 else: USB_INSERTED, USB_EXTRACTED
     */
    if(usb_monitor_enabled)
    {
        int oldstatus = disable_irq_save(); /* Dual-use function */
        queue_remove_from_head(&usb_queue, current_status);
        queue_post(&usb_queue, current_status, 0);
        restore_irq(oldstatus);
    }
}

void usb_start_monitoring(void)
{
    int oldstatus = disable_irq_save(); /* Sync to event */
    int status = usb_detect();

    usb_monitor_enabled = true;

    /* An event may have been missed because it was sent before monitoring
     * was enabled due to the connector already having been inserted before
     * before or during boot. */
#ifdef USB_DETECT_BY_CORE
    /* Filter the status - USB_INSERTED may happen later */
    status = (status == USB_EXTRACTED) ? USB_UNPOWERED : USB_POWERED;
#endif
    usb_status_event(status);

#ifdef USB_FIREWIRE_HANDLING
    if(firewire_detect())
        usb_firewire_connect_event();
#endif

    restore_irq(oldstatus);
}

#ifdef USB_FIREWIRE_HANDLING
void usb_firewire_connect_event(void)
{
    queue_post(&usb_queue, USB_REQUEST_REBOOT, 0);
}
#endif /* USB_FIREWIRE_HANDLING */

#else /* !USB_STATUS_BY_EVENT */

static void usb_tick(void)
{
    #define NUM_POLL_READINGS (HZ/5)
    static int usb_countdown = -1;
    static int last_usb_status = USB_EXTRACTED;
#ifdef USB_FIREWIRE_HANDLING
    static int firewire_countdown = -1;
    static int last_firewire_status = false;
#endif    

    if(usb_monitor_enabled)
    {
#ifdef USB_FIREWIRE_HANDLING
        int current_firewire_status = firewire_detect();
        if(current_firewire_status != last_firewire_status)
        {
            last_firewire_status = current_firewire_status;
            firewire_countdown = NUM_POLL_READINGS;
        }
        else
        {
            /* Count down until it gets negative */
            if(firewire_countdown >= 0)
                firewire_countdown--;

            /* Report to the thread if we have had 3 identical status
               readings in a row */
            if(firewire_countdown == 0)
            {
                queue_post(&usb_queue, USB_REQUEST_REBOOT, 0);
            }
        }
#endif /* USB_FIREWIRE_HANDLING */

        int current_status = usb_detect();

        /* Only report when the status has changed */
        if(current_status != last_usb_status)
        {
            last_usb_status = current_status;
            usb_countdown = NUM_POLL_READINGS;
        }
        else
        {
            /* Count down until it gets negative */
            if(usb_countdown >= 0)
                usb_countdown--;

            /* Report to the thread if we have had 3 identical status
               readings in a row */
            if(usb_countdown == 0)
            {
                queue_post(&usb_queue, current_status, 0);
            }
        }
    }
#if (CONFIG_STORAGE & STORAGE_MMC)
    if(usb_mmc_countdown > 0)
    {
        usb_mmc_countdown--;
        if(usb_mmc_countdown == 0)
            queue_post(&usb_queue, USB_REENABLE, 0);
    }
#endif
}

void usb_start_monitoring(void)
{
    usb_monitor_enabled = true;
}
#endif /* USB_STATUS_BY_EVENT */
#endif /* USB_FULL_INIT */

void usb_acknowledge(long id)
{
    queue_post(&usb_queue, id, 0);
}

void usb_init(void)
{
#ifdef USB_FULL_INIT
    usb_enable(false);

    queue_init(&usb_queue, true);

    usb_thread_entry = create_thread(usb_thread, usb_stack,
                       sizeof(usb_stack), 0, usb_thread_name
                       IF_PRIO(, PRIORITY_SYSTEM) IF_COP(, CPU));

#ifndef USB_STATUS_BY_EVENT
    tick_add_task(usb_tick);
#endif
#endif /* USB_FULL_INIT */

    usb_init_device();
}

void usb_wait_for_disconnect(struct event_queue *q)
{
#ifdef USB_FULL_INIT
    struct queue_event ev;

    /* Don't return until we get SYS_USB_DISCONNECTED */
    while(1)
    {
        queue_wait(q, &ev);
        if(ev.id == SYS_USB_DISCONNECTED)
            return;
    }
#endif /* USB_FULL_INIT */
    (void)q;
}

int usb_wait_for_disconnect_w_tmo(struct event_queue *q, int ticks)
{
#ifdef USB_FULL_INIT
    struct queue_event ev;

    /* Don't return until we get SYS_USB_DISCONNECTED or SYS_TIMEOUT */
    while(1)
    {
        queue_wait_w_tmo(q, &ev, ticks);
        switch(ev.id)
        {
            case SYS_USB_DISCONNECTED:
                return 0;
            case SYS_TIMEOUT:
                return 1;
        }
    }
#endif /* USB_FULL_INIT */
    (void)q; (void)ticks;
    return 0;
}

#ifdef USB_DRIVER_CLOSE
void usb_close(void)
{
    unsigned int thread = usb_thread_entry;
    usb_thread_entry = 0;

    if(thread == 0)
        return;

#ifndef USB_STATUS_BY_EVENT
    tick_remove_task(usb_tick);
#endif
    usb_monitor_enabled = false;
    queue_post(&usb_queue, USB_QUIT, 0);
    thread_wait(thread);
}
#endif /* USB_DRIVER_CLOSE */

bool usb_inserted(void)
{
    return usb_state == USB_INSERTED || usb_state == USB_POWERED;
}

#ifdef HAVE_USBSTACK
bool usb_exclusive_storage(void)
{
    /* Storage isn't actually exclusive until slave mode has been entered */
    return exclusive_storage_access && usb_state == USB_INSERTED;
}
#endif /* HAVE_USBSTACK */

int usb_release_exclusive_storage(void)
{
    int bccount;
    exclusive_storage_access = false;
    /* Tell all threads that we are back in business */
    bccount = queue_broadcast(SYS_USB_DISCONNECTED, 0) - 1;
    DEBUGF("USB extracted. Broadcast to %d threads...\n", bccount);
    return bccount;
}

#ifdef HAVE_USB_POWER
bool usb_powered(void)
{
    return usb_state == USB_POWERED;
}
#endif /* HAVE_USB_POWER */

#ifdef USB_ENABLE_HID
void usb_set_hid(bool enable)
{
    usb_hid = enable;
    usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
}
#endif /* USB_ENABLE_HID */

#else /* SIMULATOR || USB_NONE */

#ifdef USB_NONE
bool usb_inserted(void)
{
    return false;
}
#endif /* USB_NONE */

/* Dummy simulator functions */
void usb_acknowledge(long id)
{
    id = id;
}

void usb_init(void)
{
}

void usb_start_monitoring(void)
{
}

int usb_detect(void)
{
    return USB_EXTRACTED;
}

void usb_wait_for_disconnect(struct event_queue *q)
{
   (void)q;
}

#endif /* !USB_NONE && !SIMULATOR */