RetroArch/wii/vi_encoder.c

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/****************************************************************************
* vi_encoder.c
*
* Wii Audio/Video Encoder support
*
* Copyright (C) 2009 Eke-Eke, with some code from libogc (C) Hector Martin
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************************/
#include <string.h>
#include <gccore.h>
#include <ogcsys.h>
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#include "../gfx/gx/ppc_asm.h"
#include "vi_encoder.h"
/****************************************************************************
* I2C driver by Hector Martin (marcan)
*
****************************************************************************/
#define _SHIFTL(v, s, w) \
((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))
#define _SHIFTR(v, s, w) \
((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))
extern void udelay(int us);
static u32 i2cIdentFirst = 0;
static u32 i2cIdentFlag = 1;
static vu32* const _i2cReg = (u32*)0xCD800000;
static inline void __viOpenI2C(u32 channel)
{
u32 val = ((_i2cReg[49]&~0x8000)|0x4000);
val |= _SHIFTL(channel,15,1);
_i2cReg[49] = val;
}
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static inline void __viSetSCL(u32 channel)
{
u32 val = (_i2cReg[48]&~0x4000);
val |= _SHIFTL(channel,14,1);
_i2cReg[48] = val;
}
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static inline void __viSetSDA(u32 channel)
{
u32 val = (_i2cReg[48]&~0x8000);
val |= _SHIFTL(channel,15,1);
_i2cReg[48] = val;
}
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#define __viGetSDA() (_SHIFTR(_i2cReg[50],15,1))
static u32 __sendSlaveAddress(u8 addr)
{
u32 i;
__viSetSDA(i2cIdentFlag^1);
udelay(2);
__viSetSCL(0);
for(i=0;i<8;i++) {
if(addr&0x80) __viSetSDA(i2cIdentFlag);
else __viSetSDA(i2cIdentFlag^1);
udelay(2);
__viSetSCL(1);
udelay(2);
__viSetSCL(0);
addr <<= 1;
}
__viOpenI2C(0);
udelay(2);
__viSetSCL(1);
udelay(2);
if(i2cIdentFlag==1 && __viGetSDA()!=0) return 0;
__viSetSDA(i2cIdentFlag^1);
__viOpenI2C(1);
__viSetSCL(0);
return 1;
}
void VIDEO_SetTrapFilter(bool enable)
{
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u8 disable;
u8 data;
u8 reg;
u8 buf[2];
disable = !enable;
data = !disable;
reg = 0x03;
buf[0] = reg;
buf[1] = data;
u8 addr = 0xe0;
void* val = buf;
u32 len = 2;
u8 c;
s32 i,j;
u32 level,ret;
if(i2cIdentFirst==0)
{
__viOpenI2C(0);
udelay(4);
i2cIdentFlag = 0;
if(__viGetSDA()!=0)
i2cIdentFlag = 1;
i2cIdentFirst = 1;
}
_CPU_ISR_Disable(level);
(void)level;
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__viOpenI2C(1);
__viSetSCL(1);
__viSetSDA(i2cIdentFlag);
udelay(4);
ret = __sendSlaveAddress(addr);
if(ret==0) {
_CPU_ISR_Restore(level);
goto end;
}
__viOpenI2C(1);
for(i=0;i<len;i++) {
c = ((u8*)val)[i];
for(j=0;j<8;j++) {
u32 chan = i2cIdentFlag;
if(c&0x80) {}
else
chan ^= 1;
__viSetSDA(chan);
udelay(2);
__viSetSCL(1);
udelay(2);
__viSetSCL(0);
c <<= 1;
}
__viOpenI2C(0);
udelay(2);
__viSetSCL(1);
udelay(2);
if(i2cIdentFlag==1 && __viGetSDA()!=0) {
_CPU_ISR_Restore(level);
goto end;
}
__viSetSDA(i2cIdentFlag^1);
__viOpenI2C(1);
__viSetSCL(0);
}
__viOpenI2C(1);
__viSetSDA(i2cIdentFlag^1);
udelay(2);
__viSetSDA(i2cIdentFlag);
_CPU_ISR_Restore(level);
end:
udelay(2);
}