| 1 | /* |
| 2 | * Copyright 1998 by Alan Hourihane, Wigan, England. |
| 3 | * |
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 5 | * documentation for any purpose is hereby granted without fee, provided that |
| 6 | * the above copyright notice appear in all copies and that both that |
| 7 | * copyright notice and this permission notice appear in supporting |
| 8 | * documentation, and that the name of Alan Hourihane not be used in |
| 9 | * advertising or publicity pertaining to distribution of the software without |
| 10 | * specific, written prior permission. Alan Hourihane makes no representations |
| 11 | * about the suitability of this software for any purpose. It is provided |
| 12 | * "as is" without express or implied warranty. |
| 13 | * |
| 14 | * ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 16 | * EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 20 | * PERFORMANCE OF THIS SOFTWARE. |
| 21 | * |
| 22 | * Authors: Alan Hourihane, <alanh@fairlite.demon.co.uk> |
| 23 | * |
| 24 | * BT RAMDAC routines. |
| 25 | */ |
| 26 | |
| 27 | #ifdef HAVE_XORG_CONFIG_H |
| 28 | #include <xorg-config.h> |
| 29 | #endif |
| 30 | |
| 31 | #include "xf86.h" |
| 32 | #include "xf86_OSproc.h" |
| 33 | |
| 34 | #define INIT_BT_RAMDAC_INFO |
| 35 | #include "BTPriv.h" |
| 36 | #include "xf86RamDacPriv.h" |
| 37 | |
| 38 | void |
| 39 | BTramdacRestore(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPtr, |
| 40 | RamDacRegRecPtr ramdacReg) |
| 41 | { |
| 42 | int i; |
| 43 | |
| 44 | /* Here we pass a short, so that we can evaluate a mask too */ |
| 45 | /* So that the mask is the high byte and the data the low byte */ |
| 46 | /* Just the command/status registers */ |
| 47 | for (i = 0x06; i < 0x0A; i++) |
| 48 | (*ramdacPtr->WriteDAC) |
| 49 | (pScrn, i, (ramdacReg->DacRegs[i] & 0xFF00) >> 8, |
| 50 | ramdacReg->DacRegs[i]); |
| 51 | } |
| 52 | |
| 53 | void |
| 54 | BTramdacSave(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPtr, |
| 55 | RamDacRegRecPtr ramdacReg) |
| 56 | { |
| 57 | int i; |
| 58 | |
| 59 | (*ramdacPtr->ReadAddress) (pScrn, 0); /* Start at index 0 */ |
| 60 | for (i = 0; i < 768; i++) |
| 61 | ramdacReg->DAC[i] = (*ramdacPtr->ReadData) (pScrn); |
| 62 | |
| 63 | /* Just the command/status registers */ |
| 64 | for (i = 0x06; i < 0x0A; i++) |
| 65 | ramdacReg->DacRegs[i] = (*ramdacPtr->ReadDAC) (pScrn, i); |
| 66 | } |
| 67 | |
| 68 | RamDacHelperRecPtr |
| 69 | BTramdacProbe(ScrnInfoPtr pScrn, |
| 70 | RamDacSupportedInfoRecPtr ramdacs /*, RamDacRecPtr ramdacPtr */ ) |
| 71 | { |
| 72 | RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn); |
| 73 | Bool RamDacIsSupported = FALSE; |
| 74 | RamDacHelperRecPtr ramdacHelperPtr = NULL; |
| 75 | int BTramdac_ID = -1; |
| 76 | int i, status, cmd0; |
| 77 | |
| 78 | /* Save COMMAND Register 0 */ |
| 79 | cmd0 = (*ramdacPtr->ReadDAC) (pScrn, BT_COMMAND_REG_0); |
| 80 | /* Ensure were going to access the STATUS Register on next read */ |
| 81 | (*ramdacPtr->WriteDAC) (pScrn, BT_COMMAND_REG_0, 0x7F, 0x00); |
| 82 | |
| 83 | status = (*ramdacPtr->ReadDAC) (pScrn, BT_STATUS_REG); |
| 84 | switch (status) { |
| 85 | case 0x40: |
| 86 | BTramdac_ID = ATT20C504_RAMDAC; |
| 87 | break; |
| 88 | case 0xD0: |
| 89 | BTramdac_ID = ATT20C505_RAMDAC; |
| 90 | break; |
| 91 | default: |
| 92 | xf86DrvMsg(pScrn->scrnIndex, X_PROBED, |
| 93 | "Unknown BT RAMDAC type (0x%x), assuming BT485\n", status); |
| 94 | case 0x80: |
| 95 | case 0x90: |
| 96 | case 0xA0: |
| 97 | case 0xB0: |
| 98 | case 0x28: /* This is for the DEC TGA - Questionable ? */ |
| 99 | BTramdac_ID = BT485_RAMDAC; |
| 100 | break; |
| 101 | } |
| 102 | |
| 103 | /* Restore COMMAND Register 0 */ |
| 104 | (*ramdacPtr->WriteDAC) (pScrn, BT_COMMAND_REG_0, 0x00, cmd0); |
| 105 | |
| 106 | if (BTramdac_ID == -1) { |
| 107 | xf86DrvMsg(pScrn->scrnIndex, X_PROBED, |
| 108 | "Cannot determine BT RAMDAC type, aborting\n"); |
| 109 | return NULL; |
| 110 | } |
| 111 | else { |
| 112 | xf86DrvMsg(pScrn->scrnIndex, X_PROBED, |
| 113 | "Attached RAMDAC is %s\n", |
| 114 | BTramdacDeviceInfo[BTramdac_ID & 0xFFFF].DeviceName); |
| 115 | } |
| 116 | |
| 117 | for (i = 0; ramdacs[i].token != -1; i++) { |
| 118 | if (ramdacs[i].token == BTramdac_ID) |
| 119 | RamDacIsSupported = TRUE; |
| 120 | } |
| 121 | |
| 122 | if (!RamDacIsSupported) { |
| 123 | xf86DrvMsg(pScrn->scrnIndex, X_PROBED, |
| 124 | "This BT RAMDAC is NOT supported by this driver, aborting\n"); |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | ramdacHelperPtr = RamDacHelperCreateInfoRec(); |
| 129 | switch (BTramdac_ID) { |
| 130 | case BT485_RAMDAC: |
| 131 | ramdacHelperPtr->SetBpp = BTramdacSetBpp; |
| 132 | break; |
| 133 | } |
| 134 | ramdacPtr->RamDacType = BTramdac_ID; |
| 135 | ramdacHelperPtr->RamDacType = BTramdac_ID; |
| 136 | ramdacHelperPtr->Save = BTramdacSave; |
| 137 | ramdacHelperPtr->Restore = BTramdacRestore; |
| 138 | |
| 139 | return ramdacHelperPtr; |
| 140 | } |
| 141 | |
| 142 | void |
| 143 | BTramdacSetBpp(ScrnInfoPtr pScrn, RamDacRegRecPtr ramdacReg) |
| 144 | { |
| 145 | /* We need to deal with Direct Colour visuals for 8bpp and other |
| 146 | * good stuff for colours */ |
| 147 | switch (pScrn->bitsPerPixel) { |
| 148 | case 32: |
| 149 | ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x10; |
| 150 | break; |
| 151 | case 24: |
| 152 | ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x10; |
| 153 | break; |
| 154 | case 16: |
| 155 | ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x38; |
| 156 | break; |
| 157 | case 15: |
| 158 | ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x30; |
| 159 | break; |
| 160 | case 8: |
| 161 | ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x40; |
| 162 | break; |
| 163 | case 4: |
| 164 | ramdacReg->DacRegs[BT_COMMAND_REG_1] = 0x60; |
| 165 | break; |
| 166 | } |
| 167 | } |