diff options
Diffstat (limited to 'arch/i386/boot/video-vesa.c')
| -rw-r--r-- | arch/i386/boot/video-vesa.c | 292 |
1 files changed, 0 insertions, 292 deletions
diff --git a/arch/i386/boot/video-vesa.c b/arch/i386/boot/video-vesa.c deleted file mode 100644 index 192190710710..000000000000 --- a/arch/i386/boot/video-vesa.c +++ /dev/null @@ -1,292 +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-vesa.c - * - * VESA text modes - */ - -#include "boot.h" -#include "video.h" -#include "vesa.h" - -/* VESA information */ -static struct vesa_general_info vginfo; -static struct vesa_mode_info vminfo; - -__videocard video_vesa; - -static void vesa_store_mode_params_graphics(void); - -static int vesa_probe(void) -{ -#if defined(CONFIG_VIDEO_VESA) || defined(CONFIG_FIRMWARE_EDID) - u16 ax, cx, di; - u16 mode; - addr_t mode_ptr; - struct mode_info *mi; - int nmodes = 0; - - video_vesa.modes = GET_HEAP(struct mode_info, 0); - - vginfo.signature = VBE2_MAGIC; - - ax = 0x4f00; - di = (size_t)&vginfo; - asm(INT10 - : "+a" (ax), "+D" (di), "=m" (vginfo) - : : "ebx", "ecx", "edx", "esi"); - - if (ax != 0x004f || - vginfo.signature != VESA_MAGIC || - vginfo.version < 0x0102) - return 0; /* Not present */ -#endif /* CONFIG_VIDEO_VESA || CONFIG_FIRMWARE_EDID */ -#ifdef CONFIG_VIDEO_VESA - set_fs(vginfo.video_mode_ptr.seg); - mode_ptr = vginfo.video_mode_ptr.off; - - while ((mode = rdfs16(mode_ptr)) != 0xffff) { - mode_ptr += 2; - - if (heap_free() < sizeof(struct mode_info)) - break; /* Heap full, can't save mode info */ - - if (mode & ~0x1ff) - continue; - - memset(&vminfo, 0, sizeof vminfo); /* Just in case... */ - - ax = 0x4f01; - cx = mode; - di = (size_t)&vminfo; - asm(INT10 - : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo) - : : "ebx", "edx", "esi"); - - if (ax != 0x004f) - continue; - - if ((vminfo.mode_attr & 0x15) == 0x05) { - /* Text Mode, TTY BIOS supported, - supported by hardware */ - mi = GET_HEAP(struct mode_info, 1); - mi->mode = mode + VIDEO_FIRST_VESA; - mi->x = vminfo.h_res; - mi->y = vminfo.v_res; - nmodes++; - } else if ((vminfo.mode_attr & 0x99) == 0x99) { -#ifdef CONFIG_FB - /* Graphics mode, color, linear frame buffer - supported -- register the mode but hide from - the menu. Only do this if framebuffer is - configured, however, otherwise the user will - be left without a screen. */ - mi = GET_HEAP(struct mode_info, 1); - mi->mode = mode + VIDEO_FIRST_VESA; - mi->x = mi->y = 0; - nmodes++; -#endif - } - } - - return nmodes; -#else - return 0; -#endif /* CONFIG_VIDEO_VESA */ -} - -static int vesa_set_mode(struct mode_info *mode) -{ - u16 ax, bx, cx, di; - int is_graphic; - u16 vesa_mode = mode->mode - VIDEO_FIRST_VESA; - - memset(&vminfo, 0, sizeof vminfo); /* Just in case... */ - - ax = 0x4f01; - cx = vesa_mode; - di = (size_t)&vminfo; - asm(INT10 - : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo) - : : "ebx", "edx", "esi"); - - if (ax != 0x004f) - return -1; - - if ((vminfo.mode_attr & 0x15) == 0x05) { - /* It's a supported text mode */ - is_graphic = 0; - } else if ((vminfo.mode_attr & 0x99) == 0x99) { - /* It's a graphics mode with linear frame buffer */ - is_graphic = 1; - vesa_mode |= 0x4000; /* Request linear frame buffer */ - } else { - return -1; /* Invalid mode */ - } - - - ax = 0x4f02; - bx = vesa_mode; - di = 0; - asm volatile(INT10 - : "+a" (ax), "+b" (bx), "+D" (di) - : : "ecx", "edx", "esi"); - - if (ax != 0x004f) - return -1; - - graphic_mode = is_graphic; - if (!is_graphic) { - /* Text mode */ - force_x = mode->x; - force_y = mode->y; - do_restore = 1; - } else { - /* Graphics mode */ - vesa_store_mode_params_graphics(); - } - - return 0; -} - - -/* Switch DAC to 8-bit mode */ -static void vesa_dac_set_8bits(void) -{ - u8 dac_size = 6; - - /* If possible, switch the DAC to 8-bit mode */ - if (vginfo.capabilities & 1) { - u16 ax, bx; - - ax = 0x4f08; - bx = 0x0800; - asm volatile(INT10 - : "+a" (ax), "+b" (bx) - : : "ecx", "edx", "esi", "edi"); - - if (ax == 0x004f) - dac_size = bx >> 8; - } - - /* Set the color sizes to the DAC size, and offsets to 0 */ - boot_params.screen_info.red_size = dac_size; - boot_params.screen_info.green_size = dac_size; - boot_params.screen_info.blue_size = dac_size; - boot_params.screen_info.rsvd_size = dac_size; - - boot_params.screen_info.red_pos = 0; - boot_params.screen_info.green_pos = 0; - boot_params.screen_info.blue_pos = 0; - boot_params.screen_info.rsvd_pos = 0; -} - -/* Save the VESA protected mode info */ -static void vesa_store_pm_info(void) -{ - u16 ax, bx, di, es; - - ax = 0x4f0a; - bx = di = 0; - asm("pushw %%es; "INT10"; movw %%es,%0; popw %%es" - : "=d" (es), "+a" (ax), "+b" (bx), "+D" (di) - : : "ecx", "esi"); - - if (ax != 0x004f) - return; - - boot_params.screen_info.vesapm_seg = es; - boot_params.screen_info.vesapm_off = di; -} - -/* - * Save video mode parameters for graphics mode - */ -static void vesa_store_mode_params_graphics(void) -{ - /* Tell the kernel we're in VESA graphics mode */ - boot_params.screen_info.orig_video_isVGA = 0x23; - - /* Mode parameters */ - boot_params.screen_info.vesa_attributes = vminfo.mode_attr; - boot_params.screen_info.lfb_linelength = vminfo.logical_scan; - boot_params.screen_info.lfb_width = vminfo.h_res; - boot_params.screen_info.lfb_height = vminfo.v_res; - boot_params.screen_info.lfb_depth = vminfo.bpp; - boot_params.screen_info.pages = vminfo.image_planes; - boot_params.screen_info.lfb_base = vminfo.lfb_ptr; - memcpy(&boot_params.screen_info.red_size, - &vminfo.rmask, 8); - - /* General parameters */ - boot_params.screen_info.lfb_size = vginfo.total_memory; - - if (vminfo.bpp <= 8) - vesa_dac_set_8bits(); - - vesa_store_pm_info(); -} - -/* - * Save EDID information for the kernel; this is invoked, separately, - * after mode-setting. - */ -void vesa_store_edid(void) -{ -#ifdef CONFIG_FIRMWARE_EDID - u16 ax, bx, cx, dx, di; - - /* Apparently used as a nonsense token... */ - memset(&boot_params.edid_info, 0x13, sizeof boot_params.edid_info); - - if (vginfo.version < 0x0200) - return; /* EDID requires VBE 2.0+ */ - - ax = 0x4f15; /* VBE DDC */ - bx = 0x0000; /* Report DDC capabilities */ - cx = 0; /* Controller 0 */ - di = 0; /* ES:DI must be 0 by spec */ - - /* Note: The VBE DDC spec is different from the main VESA spec; - we genuinely have to assume all registers are destroyed here. */ - - asm("pushw %%es; movw %2,%%es; "INT10"; popw %%es" - : "+a" (ax), "+b" (bx) - : "c" (cx), "D" (di) - : "esi"); - - if (ax != 0x004f) - return; /* No EDID */ - - /* BH = time in seconds to transfer EDD information */ - /* BL = DDC level supported */ - - ax = 0x4f15; /* VBE DDC */ - bx = 0x0001; /* Read EDID */ - cx = 0; /* Controller 0 */ - dx = 0; /* EDID block number */ - di =(size_t) &boot_params.edid_info; /* (ES:)Pointer to block */ - asm(INT10 - : "+a" (ax), "+b" (bx), "+d" (dx), "=m" (boot_params.edid_info) - : "c" (cx), "D" (di) - : "esi"); -#endif /* CONFIG_FIRMWARE_EDID */ -} - -__videocard video_vesa = -{ - .card_name = "VESA", - .probe = vesa_probe, - .set_mode = vesa_set_mode, - .xmode_first = VIDEO_FIRST_VESA, - .xmode_n = 0x200, -}; |