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/*
* Copyright 1999 by Matthew Grossman, Seattle, USA.
*
* 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 Matthew
* Grossman not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Matthew Grossman makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* MATTHEW GROSSMAN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL MATTHEW GROSSMAN 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.
*
* Author: Matthew Grossman, mattg@oz.net
*
* DEC TGA hardware cursor using BT485 ramdac
*/
/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/tga/tga_cursor.c,v 1.1 1999/04/17 07:06:58 dawes Exp $ */
/* tga_cursor.c */
#include "xf86.h"
#include "xf86PciInfo.h"
#include "xf86Pci.h"
#include "BT.h"
#include "tga.h"
#include "tga_regs.h"
/* defines */
/* BT485 also supports 32 bit cursor, but why use it? */
#define CURSOR_SIZE 64
/* protos */
static void TGALoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src);
static void TGAShowCursor(ScrnInfoPtr pScrn);
static void TGAHideCursor(ScrnInfoPtr pScrn);
static void TGASetCursorPosition(ScrnInfoPtr pScrn, int x, int y);
static void TGASetCursorColors(ScrnInfoPtr pScrn, int bg, int fg);
static void
TGALoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src)
{
TGAPtr pTga = TGAPTR(pScrn);
int i;
/* set 64 bit cursor */
pTga->RamDacRec->WriteDAC(pScrn, BT_COMMAND_REG_0, 0x7F, 0x80);
pTga->RamDacRec->WriteDAC(pScrn, BT_WRITE_ADDR, 0x00, 0x01);
pTga->RamDacRec->WriteDAC(pScrn, BT_STATUS_REG, 0xF8, 0x04);
/* first write address reg @ 0x0, then write 0xb with the data (for 32 bit
cursor) */
pTga->RamDacRec->WriteDAC(pScrn, BT_WRITE_ADDR, 0xFC, 0x00);
for(i = 0; i < ((CURSOR_SIZE * CURSOR_SIZE) / 8); i++)
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_RAM_DATA, 0x00, *src++);
for(i = 0; i < ((CURSOR_SIZE * CURSOR_SIZE) / 8); i++)
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_RAM_DATA, 0x00, *src++);
/* pTga->RamDacRec->WriteDAC(pScrn, BT_WRITE_ADDR, 0xFC, 0x00); */
return;
}
static void
TGAShowCursor(ScrnInfoPtr pScrn)
{
TGAPtr pTga = TGAPTR(pScrn);
/* enable BT485 X11 cursor */
pTga->RamDacRec->WriteDAC(pScrn, BT_COMMAND_REG_2, 0xFC, 0x03);
return;
}
static void
TGAHideCursor(ScrnInfoPtr pScrn)
{
TGAPtr pTga = TGAPTR(pScrn);
pTga->RamDacRec->WriteDAC(pScrn, BT_COMMAND_REG_2, 0xFC, 0x00);
return;
}
static void
TGASetCursorPosition(ScrnInfoPtr pScrn, int x, int y)
{
TGAPtr pTga = TGAPTR(pScrn);
unsigned int tmp_x, tmp_y;
/* translate x && y to BT485 cursor addresses */
tmp_x = x + CURSOR_SIZE;
tmp_x &= 0x0FFF;
tmp_y = y + CURSOR_SIZE;
tmp_y &= 0x0FFF;
/* write out the addresses */
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_X_LOW, 0x00, (tmp_x & 0xFF));
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_X_HIGH, 0xF0, (tmp_x >> 8));
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_Y_LOW, 0x00, (tmp_y & 0xFF));
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_Y_HIGH, 0xF0, (tmp_y >> 8));
return;
}
static void
TGASetCursorColors(ScrnInfoPtr pScrn, int bg, int fg)
/* set pScrn->cursor_fg and pScrn->cursor_bg */
{
TGAPtr pTga = TGAPTR(pScrn);
/* first, load address register at 0x4 with 0x1, then write 3 color
octets RGB to 0x5 (background), then write three octets to 0x5
(foreground), then write to address register 0xFC */
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_WR_ADDR, 0xFC, 0x01);
/* we don't seem to support the 6 bit DAC option as of 4.0, and why
would we? */
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_DATA, 0x00, (bg & 0x00FF0000) >> 16);
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_DATA, 0x00, (bg & 0x0000FF00) >> 8);
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_DATA, 0x00, (bg & 0x000000FF));
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_DATA, 0x00, (fg & 0x00FF0000) >> 16);
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_DATA, 0x00, (fg & 0x0000FF00) >> 8);
pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_DATA, 0x00, (fg & 0x000000FF));
/* pTga->RamDacRec->WriteDAC(pScrn, BT_CURS_WR_ADDR, 0xFC, 0x00); */
return;
}
Bool
TGAHWCursorInit(ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
TGAPtr pTga;
xf86CursorInfoPtr infoPtr;
pTga = TGAPTR(pScrn);
infoPtr = xf86CreateCursorInfoRec();
if(!infoPtr) return FALSE;
pTga->CursorInfoRec = infoPtr;
infoPtr->MaxWidth = CURSOR_SIZE;
infoPtr->MaxHeight = CURSOR_SIZE;
infoPtr->Flags = HARDWARE_CURSOR_AND_SOURCE_WITH_MASK |
HARDWARE_CURSOR_BIT_ORDER_MSBFIRST |
HARDWARE_CURSOR_TRUECOLOR_AT_8BPP;
infoPtr->SetCursorColors = TGASetCursorColors;
infoPtr->SetCursorPosition = TGASetCursorPosition;
infoPtr->LoadCursorImage = TGALoadCursorImage;
infoPtr->HideCursor = TGAHideCursor;
infoPtr->ShowCursor = TGAShowCursor;
infoPtr->UseHWCursor = NULL;
return(xf86InitCursor(pScreen, infoPtr));
}
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