diff options
Diffstat (limited to 'arch/i386/boot/video-vga.c')
| -rw-r--r-- | arch/i386/boot/video-vga.c | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/arch/i386/boot/video-vga.c b/arch/i386/boot/video-vga.c deleted file mode 100644 index aef02f9ec0c1..000000000000 --- a/arch/i386/boot/video-vga.c +++ /dev/null @@ -1,261 +0,0 @@ -/* -*- linux-c -*- ------------------------------------------------------- * - * - * Copyright (C) 1991, 1992 Linus Torvalds - * Copyright 2007 rPath, Inc. - All Rights Reserved - * - * This file is part of the Linux kernel, and is made available under - * the terms of the GNU General Public License version 2. - * - * ----------------------------------------------------------------------- */ - -/* - * arch/i386/boot/video-vga.c - * - * Common all-VGA modes - */ - -#include "boot.h" -#include "video.h" - -static struct mode_info vga_modes[] = { - { VIDEO_80x25, 80, 25 }, - { VIDEO_8POINT, 80, 50 }, - { VIDEO_80x43, 80, 43 }, - { VIDEO_80x28, 80, 28 }, - { VIDEO_80x30, 80, 30 }, - { VIDEO_80x34, 80, 34 }, - { VIDEO_80x60, 80, 60 }, -}; - -static struct mode_info ega_modes[] = { - { VIDEO_80x25, 80, 25 }, - { VIDEO_8POINT, 80, 43 }, -}; - -static struct mode_info cga_modes[] = { - { VIDEO_80x25, 80, 25 }, -}; - -__videocard video_vga; - -/* Set basic 80x25 mode */ -static u8 vga_set_basic_mode(void) -{ - u16 ax; - u8 rows; - u8 mode; - -#ifdef CONFIG_VIDEO_400_HACK - if (adapter >= ADAPTER_VGA) { - asm volatile(INT10 - : : "a" (0x1202), "b" (0x0030) - : "ecx", "edx", "esi", "edi"); - } -#endif - - ax = 0x0f00; - asm volatile(INT10 - : "+a" (ax) - : : "ebx", "ecx", "edx", "esi", "edi"); - - mode = (u8)ax; - - set_fs(0); - rows = rdfs8(0x484); /* rows minus one */ - -#ifndef CONFIG_VIDEO_400_HACK - if ((ax == 0x5003 || ax == 0x5007) && - (rows == 0 || rows == 24)) - return mode; -#endif - - if (mode != 3 && mode != 7) - mode = 3; - - /* Set the mode */ - ax = mode; - asm volatile(INT10 - : "+a" (ax) - : : "ebx", "ecx", "edx", "esi", "edi"); - do_restore = 1; - return mode; -} - -static void vga_set_8font(void) -{ - /* Set 8x8 font - 80x43 on EGA, 80x50 on VGA */ - - /* Set 8x8 font */ - asm volatile(INT10 : : "a" (0x1112), "b" (0)); - - /* Use alternate print screen */ - asm volatile(INT10 : : "a" (0x1200), "b" (0x20)); - - /* Turn off cursor emulation */ - asm volatile(INT10 : : "a" (0x1201), "b" (0x34)); - - /* Cursor is scan lines 6-7 */ - asm volatile(INT10 : : "a" (0x0100), "c" (0x0607)); -} - -static void vga_set_14font(void) -{ - /* Set 9x14 font - 80x28 on VGA */ - - /* Set 9x14 font */ - asm volatile(INT10 : : "a" (0x1111), "b" (0)); - - /* Turn off cursor emulation */ - asm volatile(INT10 : : "a" (0x1201), "b" (0x34)); - - /* Cursor is scan lines 11-12 */ - asm volatile(INT10 : : "a" (0x0100), "c" (0x0b0c)); -} - -static void vga_set_80x43(void) -{ - /* Set 80x43 mode on VGA (not EGA) */ - - /* Set 350 scans */ - asm volatile(INT10 : : "a" (0x1201), "b" (0x30)); - - /* Reset video mode */ - asm volatile(INT10 : : "a" (0x0003)); - - vga_set_8font(); -} - -/* I/O address of the VGA CRTC */ -u16 vga_crtc(void) -{ - return (inb(0x3cc) & 1) ? 0x3d4 : 0x3b4; -} - -static void vga_set_480_scanlines(int end) -{ - u16 crtc; - u8 csel; - - crtc = vga_crtc(); - - out_idx(0x0c, crtc, 0x11); /* Vertical sync end, unlock CR0-7 */ - out_idx(0x0b, crtc, 0x06); /* Vertical total */ - out_idx(0x3e, crtc, 0x07); /* Vertical overflow */ - out_idx(0xea, crtc, 0x10); /* Vertical sync start */ - out_idx(end, crtc, 0x12); /* Vertical display end */ - out_idx(0xe7, crtc, 0x15); /* Vertical blank start */ - out_idx(0x04, crtc, 0x16); /* Vertical blank end */ - csel = inb(0x3cc); - csel &= 0x0d; - csel |= 0xe2; - outb(csel, 0x3cc); -} - -static void vga_set_80x30(void) -{ - vga_set_480_scanlines(0xdf); -} - -static void vga_set_80x34(void) -{ - vga_set_14font(); - vga_set_480_scanlines(0xdb); -} - -static void vga_set_80x60(void) -{ - vga_set_8font(); - vga_set_480_scanlines(0xdf); -} - -static int vga_set_mode(struct mode_info *mode) -{ - /* Set the basic mode */ - vga_set_basic_mode(); - - /* Override a possibly broken BIOS */ - force_x = mode->x; - force_y = mode->y; - - switch (mode->mode) { - case VIDEO_80x25: - break; - case VIDEO_8POINT: - vga_set_8font(); - break; - case VIDEO_80x43: - vga_set_80x43(); - break; - case VIDEO_80x28: - vga_set_14font(); - break; - case VIDEO_80x30: - vga_set_80x30(); - break; - case VIDEO_80x34: - vga_set_80x34(); - break; - case VIDEO_80x60: - vga_set_80x60(); - break; - } - - return 0; -} - -/* - * Note: this probe includes basic information required by all - * systems. It should be executed first, by making sure - * video-vga.c is listed first in the Makefile. - */ -static int vga_probe(void) -{ - static const char *card_name[] = { - "CGA/MDA/HGC", "EGA", "VGA" - }; - static struct mode_info *mode_lists[] = { - cga_modes, - ega_modes, - vga_modes, - }; - static int mode_count[] = { - sizeof(cga_modes)/sizeof(struct mode_info), - sizeof(ega_modes)/sizeof(struct mode_info), - sizeof(vga_modes)/sizeof(struct mode_info), - }; - u8 vga_flag; - - asm(INT10 - : "=b" (boot_params.screen_info.orig_video_ega_bx) - : "a" (0x1200), "b" (0x10) /* Check EGA/VGA */ - : "ecx", "edx", "esi", "edi"); - - /* If we have MDA/CGA/HGC then BL will be unchanged at 0x10 */ - if ((u8)boot_params.screen_info.orig_video_ega_bx != 0x10) { - /* EGA/VGA */ - asm(INT10 - : "=a" (vga_flag) - : "a" (0x1a00) - : "ebx", "ecx", "edx", "esi", "edi"); - - if (vga_flag == 0x1a) { - adapter = ADAPTER_VGA; - boot_params.screen_info.orig_video_isVGA = 1; - } else { - adapter = ADAPTER_EGA; - } - } else { - adapter = ADAPTER_CGA; - } - - video_vga.modes = mode_lists[adapter]; - video_vga.card_name = card_name[adapter]; - return mode_count[adapter]; -} - -__videocard video_vga = -{ - .card_name = "VGA", - .probe = vga_probe, - .set_mode = vga_set_mode, -}; |