2003-11-14 17:48:57 +01:00
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/*
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* Copyright 1998 by Alan Hourihane, Wigan, England.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Alan Hourihane not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Alan Hourihane makes no representations
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* about the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*
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* ALAN HOURIHANE 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 ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* Authors: Alan Hourihane, <alanh@fairlite.demon.co.uk>
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*
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* BT RAMDAC routines.
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*/
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2005-07-03 09:02:09 +02:00
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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2003-11-14 17:48:57 +01:00
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#include "xf86.h"
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#include "xf86_OSproc.h"
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#define INIT_BT_RAMDAC_INFO
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#include "BTPriv.h"
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#include "xf86RamDacPriv.h"
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void
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BTramdacRestore(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPtr,
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RamDacRegRecPtr ramdacReg)
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{
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int i;
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/* Here we pass a short, so that we can evaluate a mask too */
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/* So that the mask is the high byte and the data the low byte */
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/* Just the command/status registers */
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for (i=0x06;i<0x0A;i++)
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(*ramdacPtr->WriteDAC)
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(pScrn, i, (ramdacReg->DacRegs[i] & 0xFF00) >> 8,
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ramdacReg->DacRegs[i]);
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}
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void
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BTramdacSave(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPtr,
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RamDacRegRecPtr ramdacReg)
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{
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int i;
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(*ramdacPtr->ReadAddress)(pScrn, 0); /* Start at index 0 */
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for (i=0;i<768;i++)
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ramdacReg->DAC[i] = (*ramdacPtr->ReadData)(pScrn);
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/* Just the command/status registers */
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for (i=0x06;i<0x0A;i++)
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ramdacReg->DacRegs[i] = (*ramdacPtr->ReadDAC)(pScrn, i);
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}
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2008-11-28 04:55:11 +01:00
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_X_EXPORT RamDacHelperRecPtr
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2003-11-14 17:48:57 +01:00
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BTramdacProbe(ScrnInfoPtr pScrn, RamDacSupportedInfoRecPtr ramdacs/*, RamDacRecPtr ramdacPtr*/)
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{
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RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);
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Bool RamDacIsSupported = FALSE;
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RamDacHelperRecPtr ramdacHelperPtr = NULL;
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int BTramdac_ID = -1;
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int i, status, cmd0;
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/* Save COMMAND Register 0 */
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cmd0 = (*ramdacPtr->ReadDAC)(pScrn, BT_COMMAND_REG_0);
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/* Ensure were going to access the STATUS Register on next read */
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(*ramdacPtr->WriteDAC)(pScrn, BT_COMMAND_REG_0, 0x7F, 0x00);
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status = (*ramdacPtr->ReadDAC)(pScrn, BT_STATUS_REG);
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switch (status) {
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case 0x40:
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BTramdac_ID = ATT20C504_RAMDAC;
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break;
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case 0xD0:
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BTramdac_ID = ATT20C505_RAMDAC;
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break;
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default:
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xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
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"Unknown BT RAMDAC type (0x%x), assuming BT485\n",
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status);
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case 0x80:
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case 0x90:
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case 0xA0:
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case 0xB0:
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case 0x28: /* This is for the DEC TGA - Questionable ? */
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BTramdac_ID = BT485_RAMDAC;
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break;
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}
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/* Restore COMMAND Register 0 */
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(*ramdacPtr->WriteDAC)(pScrn, BT_COMMAND_REG_0, 0x00, cmd0);
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if (BTramdac_ID == -1) {
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xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
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"Cannot determine BT RAMDAC type, aborting\n");
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return NULL;
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} else {
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xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
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2003-11-25 20:29:01 +01:00
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"Attached RAMDAC is %s\n", BTramdacDeviceInfo[BTramdac_ID&0xFFFF].DeviceName);
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2003-11-14 17:48:57 +01:00
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}
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for (i=0;ramdacs[i].token != -1;i++) {
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if (ramdacs[i].token == BTramdac_ID)
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RamDacIsSupported = TRUE;
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}
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if (!RamDacIsSupported) {
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xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
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"This BT RAMDAC is NOT supported by this driver, aborting\n");
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return NULL;
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}
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ramdacHelperPtr = RamDacHelperCreateInfoRec();
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switch(BTramdac_ID) {
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case BT485_RAMDAC:
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ramdacHelperPtr->SetBpp = BTramdacSetBpp;
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break;
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}
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ramdacPtr->RamDacType = BTramdac_ID;
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ramdacHelperPtr->RamDacType = BTramdac_ID;
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ramdacHelperPtr->Save = BTramdacSave;
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ramdacHelperPtr->Restore = BTramdacRestore;
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return ramdacHelperPtr;
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}
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void
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BTramdacSetBpp(ScrnInfoPtr pScrn, RamDacRegRecPtr ramdacReg)
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{
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/* We need to deal with Direct Colour visuals for 8bpp and other
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* good stuff for colours */
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switch (pScrn->bitsPerPixel) {
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case 32:
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ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x10;
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break;
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case 24:
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ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x10;
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break;
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case 16:
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ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x38;
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break;
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case 15:
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ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x30;
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break;
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case 8:
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ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x40;
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break;
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case 4:
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ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x60;
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break;
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}
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}
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