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Diffstat (limited to 'src/BTramdac.c')
| -rw-r--r-- | src/BTramdac.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/BTramdac.c b/src/BTramdac.c new file mode 100644 index 0000000..c2aa06a --- /dev/null +++ b/src/BTramdac.c @@ -0,0 +1,178 @@ +/* + * 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. + */ +/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/tga/BTramdac.c,v 1.5 2000/10/20 12:57:26 alanh Exp $ */ + +#include "xf86.h" +#include "xf86_OSproc.h" +#include "xf86_ansic.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); +} |