Alexandru Gagniuc | 37a8a8b | 2013-05-21 14:51:26 -0500 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
| 5 | * |
| 6 | * This program is free software: you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation, either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
Alexandru Gagniuc | 37a8a8b | 2013-05-21 14:51:26 -0500 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | #include <device/device.h> |
| 18 | #include <device/pci_def.h> |
| 19 | #include <device/pci_ops.h> |
| 20 | #include <console/console.h> |
| 21 | |
| 22 | #if CONFIG_VGA_ROM_RUN |
| 23 | |
| 24 | #include <arch/interrupt.h> |
| 25 | #include <x86emu/x86emu.h> |
| 26 | |
| 27 | #include <northbridge/via/vx900/vx900.h> |
| 28 | |
| 29 | static int vx900_int15_handler(void) |
| 30 | { |
| 31 | int res; |
| 32 | |
| 33 | printk(BIOS_DEBUG, "%s %0x\n", __func__, X86_AX & 0xffff); |
| 34 | /* Set AX return value here so we don't set it every time. Just set it |
| 35 | * to something else if the callback is unsupported */ |
| 36 | res = -1; |
| 37 | switch (X86_AX & 0xffff) { |
| 38 | #if 0 |
| 39 | case 0x5f01: |
| 40 | /* VGA POST - panel type */ |
| 41 | /* FIXME: Don't hardcode panel type */ |
| 42 | /* Panel Type Number */ |
| 43 | X86_CX = 0; |
| 44 | res = 0; |
| 45 | break; |
| 46 | case 0x5f02: |
| 47 | { |
| 48 | /* Boot device selection */ |
| 49 | X86_BL = INT15_5F02_BL_HWOPT_CRTCONN; |
| 50 | /* FIXME: or 0 ? */ |
| 51 | X86_BH = 0; // INT15_5F02_BH_TV_CONN_DEFAULT; |
| 52 | X86_EBX = 0; // INT15_5F02_EBX_HDTV_RGB; |
| 53 | X86_ECX = INT15_5F02_ECX_DISPLAY_CRT; |
| 54 | //X86_ECX |= INT15_5F02_ECX_TV_MODE_RGB; |
| 55 | //X86_ECX |= INT15_5F02_ECX_HDTV_1080P; |
| 56 | X86_DL = INT15_5F02_DL_TV_LAYOUT_DEFAULT; |
| 57 | res = 0; |
| 58 | break; |
| 59 | } |
| 60 | #endif |
| 61 | case 0x5f18: |
| 62 | X86_BL = vx900_int15_get_5f18_bl(); |
| 63 | res = 0; |
| 64 | break; |
| 65 | #if 0 |
| 66 | case 0x5f2a: |
| 67 | /* Get SSC Control Settings */ |
| 68 | /* FIXME: No idea what this does. Just disable this feature |
| 69 | * for now */ |
| 70 | X86_CX = INT15_5F2A_CX_SSC_ENABLE; |
| 71 | res = 0; |
| 72 | break; |
| 73 | case 0x5f2b: |
| 74 | /* Engine clock setting */ |
| 75 | /* FIXME: ECLK fixed 250MHz ? */ |
| 76 | X86_EBX = INT15_5F2B_EBX_ECLK_250MHZ; |
| 77 | break; |
| 78 | #endif |
| 79 | default: |
| 80 | printk(BIOS_DEBUG, "Unsupported INT15 call %04x!\n", |
| 81 | X86_AX & 0xffff); |
| 82 | X86_AX = 0; |
| 83 | res = -1; |
| 84 | break; |
| 85 | } |
| 86 | |
| 87 | if (res == 0) |
| 88 | X86_AX = 0x5f; |
| 89 | else |
| 90 | X86_AX = 0; |
| 91 | return X86_AX; |
| 92 | } |
| 93 | #endif |
| 94 | |
| 95 | static void mainboard_enable(device_t dev) |
| 96 | { |
| 97 | (void)dev; |
| 98 | |
| 99 | #if CONFIG_VGA_ROM_RUN |
Stefan Reinauer | 069f476 | 2015-01-05 13:02:32 -0800 | [diff] [blame] | 100 | printk(BIOS_DEBUG, "Installing INT15 handler...\n"); |
Alexandru Gagniuc | 37a8a8b | 2013-05-21 14:51:26 -0500 | [diff] [blame] | 101 | mainboard_interrupt_handlers(0x15, &vx900_int15_handler); |
| 102 | #endif |
| 103 | } |
| 104 | |
| 105 | struct chip_operations mainboard_ops = { |
| 106 | CHIP_NAME("VIA EPIA-M850 Mainboard") |
| 107 | .enable_dev = mainboard_enable, |
| 108 | }; |