mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-26 16:47:40 +01:00
242 lines
6.1 KiB
C
242 lines
6.1 KiB
C
/*
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* gma_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 "gma_resolution.h"
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char * bios_type_names[] = {"UNKNOWN", "TYPE 1", "TYPE 2", "TYPE 3"};
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int freqs[] = { 60, 75, 85 };
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vbios_resolution_type1 * map_type1_resolution(vbios_map * map, UInt16 res) {
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vbios_resolution_type1 * ptr = ((vbios_resolution_type1*)(map->bios_ptr + res));
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return ptr;
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}
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vbios_resolution_type2 * map_type2_resolution(vbios_map * map, UInt16 res) {
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vbios_resolution_type2 * ptr = ((vbios_resolution_type2*)(map->bios_ptr + res));
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return ptr;
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}
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vbios_resolution_type3 * map_type3_resolution(vbios_map * map, UInt16 res) {
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vbios_resolution_type3 * ptr = ((vbios_resolution_type3*)(map->bios_ptr + res));
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return ptr;
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}
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char detect_bios_type(vbios_map * map, char modeline, int entry_size) {
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UInt32 i;
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UInt16 r1, r2;
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vbios_mode * mode_table = (vbios_mode *)map->mode_table;
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r1 = r2 = 32000;
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for (i=0; i < map->mode_table_size; i++) {
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if (mode_table[i].resolution <= r1) {
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r1 = mode_table[i].resolution;
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}
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else {
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if (mode_table[i].resolution <= r2) {
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r2 = mode_table[i].resolution;
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}
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}
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/*PRINT("r1 = %d r2 = %d\n", r1, r2);*/
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}
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return (r2-r1-6) % entry_size == 0;
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}
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vbios_map * open_intel_vbios(vbios_map *map)
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{
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/*
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* Find the location of the Mode Table
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*/
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unsigned char* p = map->bios_ptr + 16;
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unsigned char* limit = map->bios_ptr + VBIOS_SIZE - (3 * sizeof(vbios_mode));
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while (p < limit && map->mode_table == 0) {
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vbios_mode* mode_ptr = (vbios_mode*) p;
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if (((mode_ptr[0].mode & 0xf0) == 0x30) && ((mode_ptr[1].mode & 0xf0) == 0x30) &&
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((mode_ptr[2].mode & 0xf0) == 0x30) && ((mode_ptr[3].mode & 0xf0) == 0x30)) {
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map->mode_table = (char *)mode_ptr;
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}
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p++;
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}
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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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PRINT("Mode Table at offset : 0x%x\n", ((unsigned char *)map->mode_table) - map->bios_ptr);
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/*
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* Determine size of mode table
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*/
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vbios_mode * mode_ptr = (vbios_mode *)map->mode_table;
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while (mode_ptr->mode != 0xff) {
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map->mode_table_size++;
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mode_ptr++;
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}
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map->modeline_num = map->mode_table_size;
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PRINT("Mode Table size : %d\n", map->modeline_num);
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/*
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* Figure out what type of bios we have
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* order of detection is important
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*/
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if (detect_bios_type(map, TRUE, sizeof(vbios_modeline_type3))) {
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map->bios = BT_3;
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PRINT("Bios Type : BT_3\n");
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}
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else if (detect_bios_type(map, TRUE, sizeof(vbios_modeline_type2))) {
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map->bios = BT_2;
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PRINT("Bios Type : BT_2\n");
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}
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else if (detect_bios_type(map, FALSE, sizeof(vbios_resolution_type1))) {
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map->bios = BT_1;
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PRINT("Bios Type : BT_1\n");
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}
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else {
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PRINT("Unable to determine bios type.\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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return 0;
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}
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return map;
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}
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bool intel_set_mode_1(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
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{
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vbios_mode *mode_timing = (vbios_mode *) map->mode_table;
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vbios_resolution_type1 * res = map_type1_resolution(map, mode_timing[idx].resolution);
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UInt32 actual_x = ((res->x2 & 0xf0) << 4) | (res->x1 & 0xff);
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UInt32 actual_y = ((res->y2 & 0xf0) << 4) | (res->y1 & 0xff);
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if ((*x != 0) && (*y != 0) && ( actual_x >= 640 )) {
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PRINT("Mode %dx%d -> %dx%d \n", actual_x, actual_y, *x, *y);
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res->x2 = (res->x2 & 0x0f) | ((*x >> 4) & 0xf0);
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res->x1 = (*x & 0xff);
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res->y2 = ((*y >> 4) & 0xf0);
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res->y1 = (*y & 0xff);
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}
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res = map_type1_resolution(map, mode_timing[idx + 1].resolution);
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actual_x = ((res->x2 & 0xf0) << 4) | (res->x1 & 0xff);
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actual_y = ((res->y2 & 0xf0) << 4) | (res->y1 & 0xff);
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*x = actual_x;
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*y = actual_y;
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return TRUE;
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}
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bool intel_set_mode_2(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
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{
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UInt32 xprev, yprev, j = 0;
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vbios_mode *mode_timing = (vbios_mode *) map->mode_table;
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vbios_resolution_type2 * res = map_type2_resolution(map, mode_timing[idx].resolution);
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if ((*x != 0) && (*y != 0) && ((res->modelines[0].x1 + 1) >= 640 )) {
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PRINT("Mode %dx%d -> %dx%d \n", res->modelines[0].x1 + 1, res->modelines[0].y1 + 1, *x, *y);
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res->xchars = *x / 8;
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res->ychars = *y / 16 - 1;
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xprev = res->modelines[0].x1;
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yprev = res->modelines[0].y1;
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for(j = 0; j < 3; j++) {
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vbios_modeline_type2 * mode = &res->modelines[j];
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if (mode->x1 == xprev && mode->y1 == yprev) {
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mode->x1 = mode->x2 = *x-1;
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mode->y1 = mode->y2 = *y-1;
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gtf_timings(*x, *y, freqs[j], &mode->clock,
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&mode->hsyncstart, &mode->hsyncend,
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&mode->hblank, &mode->vsyncstart,
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&mode->vsyncend, &mode->vblank);
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mode->htotal = mode->hblank;
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mode->vtotal = mode->vblank;
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}
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}
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}
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res = map_type2_resolution(map, mode_timing[idx + 1].resolution);
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*x = res->modelines[0].x1 + 1;
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*y = res->modelines[0].y1 + 1;
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return TRUE;
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}
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bool intel_set_mode_3(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
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{
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UInt32 xprev, yprev, j = 0;
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vbios_mode *mode_timing = (vbios_mode *) map->mode_table;
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vbios_resolution_type3 * res = map_type3_resolution(map, mode_timing[idx].resolution);
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if ((*x != 0) && (*y != 0) && ((res->modelines[0].x1 + 1) >= 640 )) {
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PRINT("Mode %dx%d -> %dx%d \n", res->modelines[0].x1 + 1, res->modelines[0].y1 + 1, *x, *y);
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xprev = res->modelines[0].x1;
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yprev = res->modelines[0].y1;
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for(j = 0; j < 3; j++) {
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vbios_modeline_type3 * mode = &res->modelines[j];
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if (mode->x1 == xprev && mode->y1 == yprev) {
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mode->x1 = mode->x2 = *x-1;
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mode->y1 = mode->y2 = *y-1;
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gtf_timings(*x, *y, freqs[j], &mode->clock,
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&mode->hsyncstart, &mode->hsyncend,
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&mode->hblank, &mode->vsyncstart,
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&mode->vsyncend, &mode->vblank);
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mode->htotal = mode->hblank;
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mode->vtotal = mode->vblank;
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mode->timing_h = *y-1;
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mode->timing_v = *x-1;
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}
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}
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}
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res = map_type3_resolution(map, mode_timing[idx + 1].resolution);
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*x = res->modelines[0].x1 + 1;
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*y = res->modelines[0].y1 + 1;
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return TRUE;
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} |