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/* $XFree86: xc/programs/Xserver/hw/xfree86/SuperProbe/8514.c,v 3.4 1996/12/23 06:30:55 dawes Exp $ */
/*
* (c) Copyright 1993,1994 by David Wexelblat <dwex@xfree86.org>
*
* 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:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* DAVID WEXELBLAT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of David Wexelblat shall not be
* used in advertising or otherwise to promote the sale, use or other dealings
* in this Software without prior written authorization from David Wexelblat.
*
*/
/* $XConsortium: 8514.c /main/5 1996/02/21 17:08:59 kaleb $ */
#include "Probe.h"
/*
* Check for basic 8514 functionality. 8514 extended functionality will
* be checked for elsewhere.
*/
static Word Ports[] = {SUBSYS_CNTL,ERR_TERM};
#define NUMPORTS (sizeof(Ports)/sizeof(Word))
static int MemProbe_8514 __STDCARGS((int));
Chip_Descriptor IBM8514_Descriptor = {
"8514/A",
Probe_8514,
Ports,
NUMPORTS,
TRUE,
FALSE,
FALSE,
MemProbe_8514,
};
Bool Probe_8514(Chipset)
int *Chipset;
{
Bool result = FALSE;
EnableIOPorts(NUMPORTS, Ports);
/*
* Reset the 8514/A, and disable all interrupts.
*/
outpw(SUBSYS_CNTL, GPCTRL_RESET|CHPTEST_NORMAL);
outpw(SUBSYS_CNTL, GPCTRL_ENAB|CHPTEST_NORMAL);
/*
* Check to see if an 8514/A is actually installed by writing
* to the ERR_TERM register and reading back. The 0x5A5A value
* is entirely arbitrary.
*/
outpw(ERR_TERM, 0x5A5A);
if (inpw(ERR_TERM) == 0x5A5A)
{
/*
* Let's make certain.
*/
outpw(ERR_TERM, 0x5555);
if (inpw(ERR_TERM) == 0x5555)
{
if (tstrg(EXT_CONF_3, 0xF0))
{
*Chipset = CHIP_CT480;
}
else
{
*Chipset = CHIP_8514;
}
result = TRUE;
}
}
DisableIOPorts(NUMPORTS, Ports);
return(result);
}
/* ARGSUSED */
static int MemProbe_8514(Chipset)
int Chipset;
{
int Mem;
EnableIOPorts(NUMPORTS, Ports);
if (inpw(SUBSYS_CNTL) & 0x0080)
{
Mem = 1024;
}
else
{
Mem = 512;
}
DisableIOPorts(NUMPORTS, Ports);
return(Mem);
}
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