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usb.c
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usb.c
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/*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#ifdef IPOD
#include <string.h>
#include <unistd.h>
#endif
#include "pz.h"
#include "mlist.h"
#define outl(a, b) (*(volatile unsigned int *)(b) = (a))
#define inl(a) (*(volatile unsigned int *)(a))
#ifdef IPOD
static int usb_check_connection()
{
if ((inl(0xc50001A4) & 0x800)==0)
return 0;
else
return 1; // we're connected - yay!
}
static int usb_get_usb2d_ident_reg()
{
return inl(0xc5000000);
}
static int setup_usb(int arg0)
{
int r0, r1;
static int usb_inited = 0;
if (!usb_inited)
{
outl(inl(0x70000084) | 0x200, 0x70000084);
if (arg0==0)
{
outl(inl(0x70000080) & ~0x2000, 0x70000080);
return 0;
}
outl(inl(0x7000002C) | 0x3000000, 0x7000002C);
outl(inl(0x6000600C) | 0x400000, 0x6000600C);
outl(inl(0x60006004) | 0x400000, 0x60006004); // reset usb start
outl(inl(0x60006004) & ~0x400000, 0x60006004); // reset usb end
outl(inl(0x70000020) | 0x80000000, 0x70000020);
while ((inl(0x70000028) & 0x80) == 0);
outl(inl(0xc5000184) | 0x100, 0xc5000184);
while ((inl(0xc5000184) & 0x100) != 0);
outl(inl(0xc50001A4) | 0x5F000000, 0xc50001A4);
if ((inl(0xc50001A4) & 0x100) == 0)
{
outl(inl(0xc50001A8) & ~0x3, 0xc50001A8);
outl(inl(0xc50001A8) | 0x2, 0xc50001A8);
outl(inl(0x70000028) | 0x4000, 0x70000028);
outl(inl(0x70000028) | 0x2, 0x70000028);
} else {
outl(inl(0xc50001A8) | 0x3, 0xc50001A8);
outl(inl(0x70000028) &~0x4000, 0x70000028);
outl(inl(0x70000028) | 0x2, 0x70000028);
}
outl(inl(0xc5000140) | 0x2, 0xc5000140);
while((inl(0xc5000140) & 0x2) != 0);
r0 = inl(0xc5000184);
///////////////THIS NEEDS TO BE CHANGED ONCE THERE IS KERNEL USB
outl(inl(0x70000020) | 0x80000000, 0x70000020);
outl(inl(0x6000600C) | 0x400000, 0x6000600C);
while ((inl(0x70000028) & 0x80) == 0);
outl(inl(0x70000028) | 0x2, 0x70000028);
//wait_usec(0x186A0);
usleep(0x186A0);
/////////////////////////////////////////////////////////////////
r0 = r0 << 4;
r1 = r0 >> 30;
usb_inited = 1;
return r1; // if r1>2 or r1 < 0 then it returns crap - not sure what
} else {
return 0;
}
}
static int usb_test_core(int arg0)
{
int r0;
setup_usb(1);
r0 = usb_get_usb2d_ident_reg();
if (r0!=arg0)
{
///// USB2D_IDENT iS BAD
return 0;
} else {
if (!usb_check_connection())
{
/// we're not connected to anything
return 0;
} else {
return 1;
// display id from r0
}
}
}
#endif
int usb_is_connected(void)
{
#ifdef IPOD
if (hw_version >= 0x4)
{
static int r0;
r0 = usb_test_core(0x22fA05);
return r0;
}
#endif
return 0;
}
static void goto_diskmode()
{
#ifdef IPOD
unsigned char * storage_ptr = (unsigned char *)0x40017F00;
char * diskmode = "diskmode\0";
char * hotstuff = "hotstuff\0";
memcpy(storage_ptr, diskmode, 9);
storage_ptr = (unsigned char *)0x40017f08;
memcpy(storage_ptr, hotstuff, 9);
outl(1, 0x40017F10);
outl(inl(0x60006004) | 0x4, 0x60006004);
#endif
}
void usb_check_goto_diskmode()
{
if (hw_version < 0x4)
return;
if (DIALOG_MESSAGE_T2(_("USB Connect"),
_("Go to diskmode?"),
_("No"), _("Yes"), 10)==1)
goto_diskmode();
}