rockbox/firmware/target/arm/usb-fw-pp502x.c

/***************************************************************************
 *             __________               __   ___.
 *   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
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "config.h"
#include "system.h"
#include "usb.h"
#include "button.h"
#include "ata.h"
#include "string.h"
#ifdef HAVE_USBSTACK
#include "usb_core.h"
#include "usb_drv.h"
#endif

void usb_init_device(void)
{
    /* enable usb module */
    GPO32_ENABLE |= 0x200;  

    outl(inl(0x7000002C) | 0x3000000, 0x7000002C);  
    DEV_EN |= DEV_USB;

    DEV_RS |= DEV_USB; /* reset usb start */  
    DEV_RS &=~DEV_USB;/* reset usb end */  

    DEV_INIT2 |= INIT_USB;
    while ((inl(0x70000028) & 0x80) == 0);
    outl(inl(0x70000028) | 0x2, 0x70000028);
    udelay(0x186A0);

#if defined(IPOD_COLOR) || defined(IPOD_4G) \
 || defined(IPOD_MINI)  || defined(IPOD_MINI2G)
    /* GPIO C bit 1 is firewire detect */
    GPIOC_ENABLE    |=  0x02;
    GPIOC_OUTPUT_EN &= ~0x02;
#endif
}

void usb_enable(bool on)
{
#ifdef HAVE_USBSTACK
    if (on)
        usb_core_init();
    else
        usb_core_exit();
#else
    /* This device specific code will eventually give way to proper USB
       handling, which should be the same for all PP502x targets. */
    if (on)
    {
#if defined(IPOD_ARCH) || defined(IRIVER_H10) || defined (IRIVER_H10_5GB) ||\
    defined(SANSA_C200)
        /* For the H10 and iPod, we can only do one thing with USB mode - reboot
           into the flash-based disk-mode.  This does not return. */

#if defined(IRIVER_H10) || defined (IRIVER_H10_5GB)
        if(button_status()==BUTTON_RIGHT)
#endif /* defined(IRIVER_H10) || defined (IRIVER_H10_5GB) */
        {
#ifndef HAVE_FLASH_STORAGE
            ata_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 */

            system_reboot(); /* Reboot */
        }
#endif /*defined(IPOD_ARCH) || defined(IRIVER_H10) || defined (IRIVER_H10_5GB)*/
    }
#endif /* !HAVE_USBSTACK */
}

int usb_detect(void)
{
#if defined(IPOD_COLOR) || defined(IPOD_4G) \
 || defined(IPOD_MINI)  || defined(IPOD_MINI2G)
    /* GPIO C bit 1 is firewire detect */
    if (!(GPIOC_INPUT_VAL & 0x02))
        return USB_INSERTED;
#elif defined(SANSA_C200)
    /* GPIO H bit 1 is usb detect */
    if (GPIOH_INPUT_VAL & 0x02)
        return USB_INSERTED;
#elif defined(SANSA_E200)
    /* GPIO B bit 4 is usb detect */
    if (GPIOB_INPUT_VAL & 0x10)
        return USB_INSERTED;
#elif defined(IRIVER_H10) || defined(IRIVER_H10_5GB)
    /* GPIO L bit 2 is usb detect */
    if (GPIOL_INPUT_VAL & 0x4)
        return USB_INSERTED;
#endif

    return USB_EXTRACTED;
}