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usb.c
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usb.c
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/*---------------------------------------------------------------------------------------------
* USB Gecko Development Kit - http://www.usbgecko.com
* --------------------------------------------------------------------------------------------
*
*
* usb.c - V1.2 functions for the USB Gecko adapter (www.usbgecko.com).
* Now works for Wii Mode - use WIIMODE define in usb.h to set
* Copyright (c) 2008 - Nuke - <wiinuke@gmail.com>
*
*---------------------------------------------------------------------------------------------*/
#include "types.h"
#include "usb.h"
/*---------------------------------------------------------------------------------------------*
Name: usb_sendbyte
Description: Send byte to Gamecube/Wii over EXI memory card port
*----------------------------------------------------------------------------------------------*/
static int __usb_sendbyte (char sendbyte)
{
s32 i;
exi_chan1sr = 0x000000D0;
exi_chan1data = 0xB0000000 | (sendbyte<<20);
exi_chan1cr = 0x19;
while((exi_chan1cr)&1);
i = exi_chan1data;
exi_chan1sr = 0;
if (i&0x04000000){
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------------------------*
Name: usb_receivebyte
Description: Receive byte from Gamecube/Wii over EXI memory card port
*----------------------------------------------------------------------------------------------*/
static int __usb_receivebyte (char *receivebyte)
{
s32 i = 0;
exi_chan1sr = 0x000000D0;
exi_chan1data = 0xA0000000;
exi_chan1cr = 0x19;
while((exi_chan1cr)&1);
i = exi_chan1data;
exi_chan1sr = 0;
if (i&0x08000000){
*receivebyte=(i>>16)&0xff;
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------------------------*
Name: usb_checksendstatus
Description: Chesk the FIFO is ready to send
*----------------------------------------------------------------------------------------------*/
static int __usb_checksendstatus(void)
{
s32 i = 0;
exi_chan1sr = 0x000000D0;
exi_chan1data = 0xC0000000;
exi_chan1cr = 0x19;
while((exi_chan1cr)&1);
i = exi_chan1data;
exi_chan1sr = 0x0;
if (i&0x04000000){
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------------------------*
Name: usb_checkreceivestatus
Description: Check the FIFO is ready to receive
*----------------------------------------------------------------------------------------------*/
static int __usb_checkreceivestatus(void)
{
s32 i = 0;
exi_chan1sr = 0x000000D0;
exi_chan1data = 0xD0000000;
exi_chan1cr = 0x19;
while((exi_chan1cr)&1);
i = exi_chan1data;
exi_chan1sr = 0x0;
if (i&0x04000000){
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------------------------*
Name: usb_sendbuffer
Description: Simple buffer send routine
*----------------------------------------------------------------------------------------------*/
void usb_sendbuffer (const void *buffer, int size)
{
char *sendbyte = (char*) buffer;
s32 bytesleft = size;
s32 returnvalue;
while (bytesleft > 0)
{
returnvalue = __usb_sendbyte(*sendbyte);
if(returnvalue) {
sendbyte++;
bytesleft--;
}
}
}
/*---------------------------------------------------------------------------------------------*
Name: usb_receivebuffer
Description: Simple buffer receive routine
*----------------------------------------------------------------------------------------------*/
void usb_receivebuffer (void *buffer, int size)
{
char *receivebyte = (char*)buffer;
s32 bytesleft = size;
s32 returnvalue;
while (bytesleft > 0)
{
returnvalue = __usb_receivebyte(receivebyte);
if(returnvalue) {
receivebyte++;
bytesleft--;
}
}
}
/*---------------------------------------------------------------------------------------------*
Name: usb_sendbuffersafe
Description: Simple buffer send routine with fifo check (use for large transfers)
*----------------------------------------------------------------------------------------------*/
void usb_sendbuffersafe (const void *buffer, int size)
{
char *sendbyte = (char*) buffer;
s32 bytesleft = size;
s32 returnvalue;
while (bytesleft > 0)
{
if(__usb_checksendstatus()){
returnvalue = __usb_sendbyte(*sendbyte);
if(returnvalue) {
sendbyte++;
bytesleft--;
}
}
}
}
/*---------------------------------------------------------------------------------------------*
Name: usb_receivebuffersafe
Description: Simple buffer receive routine with fifo check (use for large transfers)
*----------------------------------------------------------------------------------------------*/
void usb_receivebuffersafe (void *buffer, int size)
{
char *receivebyte = (char*)buffer;
s32 bytesleft = size;
s32 returnvalue;
while (bytesleft > 0)
{
if(__usb_checkreceivestatus()){
returnvalue = __usb_receivebyte(receivebyte);
if(returnvalue) {
receivebyte++;
bytesleft--;
}
}
}
}
/*---------------------------------------------------------------------------------------------*
Name: usb_checkgecko
Description: Check the Gecko is connected
*----------------------------------------------------------------------------------------------*/
int usb_checkgecko()
{
s32 i = 0;
exi_chan1sr = 0x000000D0;
exi_chan1data = 0x90000000;
exi_chan1cr = 0x19;
while((exi_chan1cr)&1);
i = exi_chan1data;
exi_chan1sr = 0x0;
if (i==0x04700000){
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------------------------*
Name: usb_flush
Description: Flushes the FIFO, Use at the start of your program to avoid trash
*----------------------------------------------------------------------------------------------*/
void usb_flush()
{
char tempbyte;
while (__usb_receivebyte(&tempbyte));
}