mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-27 12:15:19 +01:00
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* ati_resolution.c
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*
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*
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* Created by Le Bidou on 19/03/10.
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* Copyright 2010 ---. All rights reserved.
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*
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*/
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#include "ati_resolution.h"
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char detect_ati_bios_type(vbios_map * map) {
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return map->mode_table_size % sizeof(ATOM_MODE_TIMING) == 0;
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}
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vbios_map * open_ati_vbios(vbios_map * map, bios_tables_t ati_tables)
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{
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/*
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* Locate the Standard VESA Table
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*/
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ati_tables.MasterDataTables = (unsigned short *) &((ATOM_MASTER_DATA_TABLE *) (map->bios_ptr + ati_tables.AtomRomHeader->usMasterDataTableOffset))->ListOfDataTables;
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unsigned short std_vesa_offset = (unsigned short) ((ATOM_MASTER_LIST_OF_DATA_TABLES *)ati_tables.MasterDataTables)->StandardVESA_Timing;
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ATOM_STANDARD_VESA_TIMING * std_vesa = (ATOM_STANDARD_VESA_TIMING *) (map->bios_ptr + std_vesa_offset);
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map->mode_table = (char *) &std_vesa->aModeTimings;
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PRINT("Standard VESA Table at offset * 0x%x\n", std_vesa_offset);
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if (map->mode_table == 0) {
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PRINT("Unable to locate the mode table.\n");
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PRINT("Please run the program 'dump_bios' as root and\n");
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PRINT("email the file 'vbios.dmp' to gaeloulacuisse@yahoo.fr.\n");
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close_vbios(map);
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return 0;
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}
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//Determine Size of the Table
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map->mode_table_size = std_vesa->sHeader.usStructureSize - sizeof(ATOM_COMMON_TABLE_HEADER);
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/*
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* Find out type of table and how many entries it has
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*/
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if (!detect_ati_bios_type(map)) map->bios = BT_ATI_2;
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if (map->bios == BT_ATI_2) {
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map->modeline_num = map->mode_table_size / sizeof(ATOM_DTD_FORMAT);
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PRINT("Using DTD Format modelines\n");
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} else {
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map->modeline_num = map->mode_table_size / sizeof(ATOM_MODE_TIMING);
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PRINT("Using Atom Mode Timing modelines\n");
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}
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return map;
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}
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bool ati_set_mode_1(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
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{
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ATOM_MODE_TIMING *mode_timing = (ATOM_MODE_TIMING *) map->mode_table;
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if ((*x != 0) && (*y != 0) && ( mode_timing[idx].usCRTC_H_Disp >= 640 )) {
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PRINT("Mode %dx%d -> %dx%d\n",mode_timing[idx].usCRTC_H_Disp,mode_timing[idx].usCRTC_V_Disp,
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*x, *y);
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mode_timing[idx].usCRTC_H_Disp = *x;
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mode_timing[idx].usCRTC_V_Disp = *y;
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}
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*x = mode_timing[idx + 1].usCRTC_H_Disp;
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*y = mode_timing[idx + 1].usCRTC_V_Disp;
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return TRUE;
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}
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bool ati_set_mode_2(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
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{
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ATOM_DTD_FORMAT *mode_timing = (ATOM_DTD_FORMAT *) map->mode_table;
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if ((*x != 0) && (*y != 0) && ( mode_timing[idx].usHActive >= 640 )) {
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PRINT("Mode %dx%d -> %dx%d\n", mode_timing[idx].usHActive, mode_timing[idx].usHActive,
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*x, *y);
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mode_timing[idx].usHActive = *x;
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mode_timing[idx].usVActive = *y;
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}
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*x = mode_timing[idx + 1].usHActive;
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*y = mode_timing[idx + 1].usVActive;
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return TRUE;
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}
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