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/*
* Copyright 1998 by Alan Hourihane, Wigan, England.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Alan Hourihane not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Alan Hourihane makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* Authors: Alan Hourihane, <alanh@fairlite.demon.co.uk>
*
* tgaBTOutIndReg() and tgaBTInIndReg() are used to access
* the indirect TGA BT RAMDAC registers only.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86PciInfo.h"
#include "xf86Pci.h"
#include "tga_regs.h"
#include "BT.h"
#include "tga.h"
void
tgaBTOutIndReg(ScrnInfoPtr pScrn,
CARD32 reg, unsigned char mask, unsigned char data)
{
TGAPtr pTga;
unsigned char tmp = 0x00;
pTga = TGAPTR(pScrn);
TGA_WRITE_REG(reg << 1 | BT485_READ_BIT, TGA_RAMDAC_SETUP_REG);
if (mask != 0x00)
tmp = (TGA_READ_REG(TGA_RAMDAC_REG)>>16) & mask;
TGA_WRITE_REG(reg << 1 | BT485_WRITE_BIT, TGA_RAMDAC_SETUP_REG);
TGA_WRITE_REG ((tmp | data) | (reg<<9), TGA_RAMDAC_REG);
}
unsigned char
tgaBTInIndReg (ScrnInfoPtr pScrn, CARD32 reg)
{
TGAPtr pTga;
unsigned char ret;
pTga = TGAPTR(pScrn);
TGA_WRITE_REG(reg << 1 | BT485_READ_BIT, TGA_RAMDAC_SETUP_REG);
ret = TGA_READ_REG (TGA_RAMDAC_REG)>>16;
return (ret);
}
void
tgaBTWriteAddress (ScrnInfoPtr pScrn, CARD32 index)
{
TGAPtr pTga;
pTga = TGAPTR(pScrn);
TGA_WRITE_REG(BT_WRITE_ADDR << 1 | BT485_WRITE_BIT, TGA_RAMDAC_SETUP_REG);
TGA_WRITE_REG(index | (BT_WRITE_ADDR<<9), TGA_RAMDAC_REG);
TGA_WRITE_REG(BT_RAMDAC_DATA << 1 | BT485_WRITE_BIT, TGA_RAMDAC_SETUP_REG);
}
void
tgaBTWriteData (ScrnInfoPtr pScrn, unsigned char data)
{
TGAPtr pTga;
pTga = TGAPTR(pScrn);
TGA_WRITE_REG(data | (BT_RAMDAC_DATA << 9), TGA_RAMDAC_REG);
}
void
tgaBTReadAddress (ScrnInfoPtr pScrn, CARD32 index)
{
TGAPtr pTga;
pTga = TGAPTR(pScrn);
TGA_WRITE_REG(BT_PIXEL_MASK << 1 | BT485_WRITE_BIT, TGA_RAMDAC_SETUP_REG);
TGA_WRITE_REG(0xFF | (BT_PIXEL_MASK<<9), TGA_RAMDAC_REG);
TGA_WRITE_REG(BT_READ_ADDR << 1 | BT485_WRITE_BIT, TGA_RAMDAC_SETUP_REG);
TGA_WRITE_REG(index | (BT_READ_ADDR<<9), TGA_RAMDAC_REG);
TGA_WRITE_REG(BT_RAMDAC_DATA << 1 | BT485_READ_BIT, TGA_RAMDAC_SETUP_REG);
}
unsigned char
tgaBTReadData (ScrnInfoPtr pScrn)
{
TGAPtr pTga;
pTga = TGAPTR(pScrn);
return(TGA_READ_REG(TGA_RAMDAC_REG)>>16);
}
/********************* TGA2 stuff below here ********************/
void
tga2BTOutIndReg(ScrnInfoPtr pScrn,
CARD32 reg, unsigned char mask, unsigned char data)
{
TGAPtr pTga;
unsigned char tmp = 0x00;
unsigned int addr = 0xe000U | (reg << 8);
pTga = TGAPTR(pScrn);
if (mask != 0x00)
tmp = TGA2_READ_RAMDAC_REG(addr) & mask;
#if 0
xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "tga2OutIndReg: reg 0x%x data 0x%x\n",
reg, tmp|data);
#endif
TGA2_WRITE_RAMDAC_REG ((tmp | data), addr);
}
unsigned char
tga2BTInIndReg (ScrnInfoPtr pScrn, CARD32 reg)
{
TGAPtr pTga;
unsigned char ret;
unsigned int addr = 0xe000U | (reg << 8);
pTga = TGAPTR(pScrn);
ret = TGA2_READ_RAMDAC_REG(addr);
return (ret);
}
void
tga2BTWriteAddress (ScrnInfoPtr pScrn, CARD32 index)
{
tga2BTOutIndReg(pScrn, BT_WRITE_ADDR, 0, index);
}
void
tga2BTWriteData (ScrnInfoPtr pScrn, unsigned char data)
{
tga2BTOutIndReg(pScrn, BT_RAMDAC_DATA, 0, data);
}
void
tga2BTReadAddress (ScrnInfoPtr pScrn, CARD32 index)
{
tga2BTOutIndReg(pScrn, BT_PIXEL_MASK, 0, 0xff);
tga2BTOutIndReg(pScrn, BT_READ_ADDR, 0, index);
}
unsigned char
tga2BTReadData (ScrnInfoPtr pScrn)
{
return tga2BTInIndReg(pScrn, BT_RAMDAC_DATA);
}
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