/* $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 * * 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); }