firmware/target/arm/as3525/usb-as3525.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright © 2008 Rafaël Carré
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include <stdbool.h>
  23 #include "config.h"
  24 #include "usb.h"
  25 #ifdef HAVE_USBSTACK
  26 #include "usb_core.h"
  27 #endif
  28 #include "usb-target.h"
  29 #include "power.h"
  30 #include "as3525.h"
  31
  32 static bool bus_activity = 0;
  33 static bool connected = 0;
  34
  35 void usb_enable(bool on)
  36 {
  37 #if defined(HAVE_USBSTACK) && defined(USE_ROCKBOX_USB)
  38     if (on)
  39         usb_core_init();
  40     else
  41         usb_core_exit();
  42 #else
  43     (void)on;
  44 #endif
  45 }
  46
  47 void usb_insert_int(void)
  48 {
  49     connected = 1;
  50 }
  51
  52 void usb_remove_int(void)
  53 {
  54     connected = 0;
  55     bus_activity = 0;
  56 }
  57
  58 void usb_drv_usb_detect_event(void)
  59 {
  60     /* Bus activity seen */
  61     bus_activity = 1;
  62 }
  63
  64 int usb_detect(void)
  65 {
  66 #if CONFIG_CPU == AS3525v2 && !defined(USE_ROCKBOX_USB)
  67     /* Rebooting on USB plug can crash these players in a state where
  68      * hardware power off (pressing the power button) doesn't work anymore
  69      * TODO: Implement USB in rockbox for these players */
  70     return USB_EXTRACTED;
  71 #elif defined(USB_DETECT_BY_DRV)
  72     if(bus_activity && connected)
  73         return USB_INSERTED;
  74     else if(connected)
  75         return USB_POWERED;
  76     else
  77         return USB_UNPOWERED;
  78 #else
  79     return connected?USB_INSERTED:USB_EXTRACTED;
  80 #endif
  81 }