/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/s3virge/s3v_i2c.c,v 1.5 2004/02/13 23:58:43 dawes Exp $ */ /* * Copyright (C) 1994-2000 The XFree86 Project, Inc. * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject * to the following conditions: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * * 2. Redistributions in binary form 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, and in the same place and form as other copyright, * license and disclaimer information. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: "This product * includes software developed by The XFree86 Project, Inc * (http://www.xfree86.org/) and its contributors", in the same * place and form as other third-party acknowledgments. Alternately, * this acknowledgment may appear in the software itself, in the * same form and location as other such third-party acknowledgments. * * 4. Except as contained in this notice, the name of The XFree86 * Project, Inc shall not be used in advertising or otherwise to * promote the sale, use or other dealings in this Software without * prior written authorization from The XFree86 Project, Inc. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 XFREE86 PROJECT, INC OR ITS 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 "xf86.h" #include "xf86_OSproc.h" #include "xf86_ansic.h" #include "compiler.h" #include "xf86Pci.h" #include "xf86PciInfo.h" #include "vgaHW.h" #include "s3v.h" static void s3v_I2CPutBits(I2CBusPtr b, int clock, int data) { S3VPtr ps3v = S3VPTR(xf86Screens[b->scrnIndex]); unsigned int reg = 0x10; if(clock) reg |= 0x1; if(data) reg |= 0x2; OUTREG(DDC_REG,reg); /*ErrorF("s3v_I2CPutBits: %d %d\n", clock, data); */ } static void s3v_I2CGetBits(I2CBusPtr b, int *clock, int *data) { S3VPtr ps3v = S3VPTR(xf86Screens[b->scrnIndex]); unsigned int reg; reg = (INREG(DDC_REG)); *clock = reg & 0x4; *data = reg & 0x8; /*ErrorF("s3v_I2CGetBits: %d %d\n", *clock, *data);*/ } Bool S3V_I2CInit(ScrnInfoPtr pScrn) { S3VPtr ps3v = S3VPTR(pScrn); I2CBusPtr I2CPtr; I2CPtr = xf86CreateI2CBusRec(); if(!I2CPtr) return FALSE; ps3v->I2C = I2CPtr; I2CPtr->BusName = "I2C bus"; I2CPtr->scrnIndex = pScrn->scrnIndex; I2CPtr->I2CPutBits = s3v_I2CPutBits; I2CPtr->I2CGetBits = s3v_I2CGetBits; if (!xf86I2CBusInit(I2CPtr)) return FALSE; return TRUE; }