firmware/target/arm/usb-fw-pp5002.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Jens Arnold
  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 "config.h"
  23 #include "ata.h"
  24 #include "cpu.h"
  25 #include "string.h"
  26 #include "system.h"
  27 #include "usb.h"
  28 #include "usb-target.h"
  29
  30 void usb_init_device(void)
  31 {
  32     /* TODO: add USB init for iPod 3rd gen */
  33
  34 #if defined(IPOD_1G2G) || defined(IPOD_3G)
  35     /* GPIO C bit 7 is firewire detect */
  36     GPIOC_ENABLE    |=  0x80;
  37     GPIOC_OUTPUT_EN &= ~0x80;
  38 #endif
  39 }
  40
  41 void usb_enable(bool on)
  42 {
  43     /* This device specific code will eventually give way to proper USB
  44        handling, which should be the same for all PP5002 targets. */
  45     if (on)
  46     {
  47 #ifdef IPOD_ARCH
  48     /* For iPod, we can only do one thing with USB mode atm - reboot
  49        into the flash-based disk-mode.  This does not return. */
  50
  51         ata_sleepnow(); /* Immediately spindown the disk. */
  52         sleep(HZ*2);
  53
  54         memcpy((void *)0x40017f00, "diskmodehotstuff\1", 17);
  55
  56         system_reboot(); /* Reboot */
  57 #endif
  58     }
  59 }
  60
  61 int usb_detect(void)
  62 {
  63 #if defined(IPOD_1G2G) || defined(IPOD_3G)
  64     /* GPIO C bit 7 is firewire detect */
  65     if (!(GPIOC_INPUT_VAL & 0x80))
  66         return USB_INSERTED;
  67 #endif
  68
  69     /* TODO: add USB detection for iPod 3rd gen */
  70
  71     return USB_EXTRACTED;
  72 }