/* $XFree86: xc/programs/Xserver/hw/xfree86/SuperProbe/AL.c,v 3.4 1996/12/23 06:30:56 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: AL.c /main/5 1996/02/21 17:09:04 kaleb $ */ #include "Probe.h" static Word Ports[] = {0x000, 0x000}; #define NUMPORTS (sizeof(Ports)/sizeof(Word)) static int MemProbe_AL __STDCARGS((int)); Chip_Descriptor AL_Descriptor = { "AL", Probe_AL, Ports, NUMPORTS, FALSE, FALSE, FALSE, MemProbe_AL, }; Bool Probe_AL(Chipset) int *Chipset; { Byte old; Bool result = FALSE; /* Add CRTC to enabled ports */ Ports[0] = CRTC_IDX; Ports[1] = CRTC_REG; EnableIOPorts(NUMPORTS, Ports); old = rdinx(CRTC_IDX, 0x1A); clrinx(CRTC_IDX, 0x1A, 0x10); if (!testinx2(CRTC_IDX, 0x19, 0xCF)) { setinx(CRTC_IDX, 0x1A, 0x10); if ((testinx2(CRTC_IDX, 0x19, 0xCF) && (testinx2(CRTC_IDX, 0x1A, 0x3F)))) { result = TRUE; switch (rdinx(CRTC_IDX, 0x1A) >> 6) { case 0x03: *Chipset = CHIP_AL2101; break; case 0x02: *Chipset = CHIP_AL2228; break; default: Chip_data = rdinx(CRTC_IDX, 0x1A); *Chipset = CHIP_AL_UNKNOWN; break; } } } wrinx(CRTC_IDX, 0x1A, old); DisableIOPorts(NUMPORTS, Ports); return(result); } /* ARGSUSED */ static int MemProbe_AL(Chipset) int Chipset; { Byte old; int Mem; EnableIOPorts(NUMPORTS, Ports); /* * Unlock */ old = rdinx(CRTC_IDX, 0x1A); setinx(CRTC_IDX, 0x1A, 0x10); /* * Check */ switch (rdinx(CRTC_IDX, 0x1E) & 0x03) { case 0x00: Mem = 256; break; case 0x01: Mem = 512; break; case 0x02: Mem = 1024; break; case 0x03: Mem = 2048; break; } /* * Lock */ wrinx(CRTC_IDX, 0x1A, old); DisableIOPorts(NUMPORTS, Ports); return(Mem); }