106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/**********************************************************************
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Copyright 1998, 1999 by Precision Insight, Inc., Cedar Park, Texas.
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All Rights Reserved
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Permission to use, copy, modify, distribute, and sell this software and
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its documentation for any purpose is hereby granted without fee,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Precision Insight not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission. Precision Insight
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and its suppliers make no representations about the suitability of this
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software for any purpose. It is provided "as is" without express or
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implied warranty.
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PRECISION INSIGHT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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**********************************************************************/
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/*
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* The original Precision Insight driver for
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* XFree86 v.3.3 has been sponsored by Red Hat.
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*
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* Authors:
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* Jens Owen (jens@tungstengraphics.com)
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* Kevin E. Martin (kevin@precisioninsight.com)
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*
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* Port to Xfree86 v.4.0
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* 1998, 1999 by Egbert Eich (Egbert.Eich@Physik.TU-Darmstadt.DE)
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "xf86.h"
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#include "xf86_OSproc.h"
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#include "compiler.h"
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#include "xf86Pci.h"
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#include "xf86PciInfo.h"
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#include "vgaHW.h"
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#include "neo.h"
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static void
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neo_I2CPutBits(I2CBusPtr b, int clock, int data) {
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vgaHWPtr hwp = VGAHWPTR(xf86Screens[b->scrnIndex]);
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unsigned int reg = 0xF0;
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VGAwCR(0x21,0x00);
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VGAwCR(0x1D,0x01);
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if(clock) reg |= 1;
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if(data) reg |= 0x4;
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VGAwGR(0xA1,reg);
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/*ErrorF("neo_I2CPutBits: %d %d\n", clock, data); */
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}
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static void
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neo_I2CGetBits(I2CBusPtr b, int *clock, int *data) {
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unsigned int reg;
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vgaHWPtr hwp = VGAHWPTR(xf86Screens[b->scrnIndex]);
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reg = VGArGR(0xA1);
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*clock = 1 /* (reg & 0x?? ) */;
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*data = (reg & 0x8) != 0;
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/*ErrorF("neo_I2CGetBits: %d %d\n", *clock, *data);*/
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}
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Bool
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neo_I2CInit(ScrnInfoPtr pScrn)
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{
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NEOPtr pNeo = NEOPTR(pScrn);
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I2CBusPtr I2CPtr;
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I2CPtr = xf86CreateI2CBusRec();
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if(!I2CPtr) return FALSE;
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pNeo->I2C = I2CPtr;
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I2CPtr->BusName = "I2C bus";
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I2CPtr->scrnIndex = pScrn->scrnIndex;
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I2CPtr->I2CPutBits = neo_I2CPutBits;
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I2CPtr->I2CGetBits = neo_I2CGetBits;
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/* increase these as the defaults are too low */
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I2CPtr->RiseFallTime = 2;
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I2CPtr->HoldTime = 40;
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if (!xf86I2CBusInit(I2CPtr))
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return FALSE;
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return TRUE;
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}
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