8fc4fa45c5
* grub-core/video/video.c (grub_video_edid_checksum): New function. (grub_video_edid_preferred_mode): Likewise. Try EDID followed by the Flat Panel extension, in line with the X.org VESA driver. * grub-core/video/i386/pc/vbe.c (grub_vbe_bios_get_flat_panel_info): New function. (grub_vbe_bios_get_ddc_capabilities): Likewise. (grub_vbe_bios_read_edid): Likewise. (grub_vbe_get_preferred_mode): Likewise. (grub_video_vbe_setup): When the mode is "auto", try to get the preferred mode from VBE, and use the largest mode that is no larger than the preferred mode (some BIOSes expose a preferred mode that is not in their mode list!). If this fails, fall back to 640x480 as a safe conservative choice. (grub_video_vbe_get_edid): New function. (grub_video_vbe_adapter): Add get_edid. * include/grub/video.h (struct grub_vbe_edid_info): New structure. (struct grub_video_adapter): Add get_edid. (grub_video_edid_checksum): Add prototype. (grub_video_edid_preferred_mode): Likewise. * include/grub/i386/pc/vbe.h (struct grub_vbe_flat_panel_info): New structure. * grub-core/commands/videoinfo.c (print_edid): New function. (grub_cmd_videoinfo): Print EDID if available. * util/grub.d/00_header.in (GRUB_GFXMODE): Default to "auto". This is more appropriate on a wider range of platforms than 640x480. * docs/grub.texi (Simple configuration): Update GRUB_GFXMODE documentation.
1051 lines
31 KiB
C
1051 lines
31 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define grub_video_render_target grub_video_fbrender_target
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#include <grub/err.h>
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#include <grub/machine/memory.h>
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#include <grub/i386/pc/vbe.h>
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#include <grub/video_fb.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/video.h>
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#include <grub/i386/pc/int.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static int vbe_detected = -1;
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static struct grub_vbe_info_block controller_info;
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/* Track last mode to support cards which fail on get_mode. */
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static grub_uint32_t last_set_mode = 3;
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static struct
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{
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struct grub_video_mode_info mode_info;
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grub_uint8_t *ptr;
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} framebuffer;
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static grub_uint32_t initial_vbe_mode;
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static grub_uint16_t *vbe_mode_list;
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static void *
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real2pm (grub_vbe_farptr_t ptr)
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{
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return (void *) ((((unsigned long) ptr & 0xFFFF0000) >> 12UL)
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+ ((unsigned long) ptr & 0x0000FFFF));
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}
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/* Call VESA BIOS 0x4f09 to set palette data, return status. */
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static grub_vbe_status_t
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grub_vbe_bios_set_palette_data (grub_uint32_t color_count,
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grub_uint32_t start_index,
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struct grub_vbe_palette_data *palette_data)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f09;
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regs.ebx = 0;
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regs.ecx = color_count;
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regs.edx = start_index;
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regs.es = (((grub_addr_t) palette_data) & 0xffff0000) >> 4;
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regs.edi = ((grub_addr_t) palette_data) & 0xffff;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f00 to get VBE Controller Information, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_controller_info (struct grub_vbe_info_block *ci)
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{
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struct grub_bios_int_registers regs;
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/* Store *controller_info to %es:%di. */
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regs.es = (((grub_addr_t) ci) & 0xffff0000) >> 4;
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regs.edi = ((grub_addr_t) ci) & 0xffff;
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regs.eax = 0x4f00;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f01 to get VBE Mode Information, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_mode_info (grub_uint32_t mode,
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struct grub_vbe_mode_info_block *mode_info)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f01;
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regs.ecx = mode;
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/* Store *mode_info to %es:%di. */
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regs.es = ((grub_addr_t) mode_info & 0xffff0000) >> 4;
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regs.edi = (grub_addr_t) mode_info & 0x0000ffff;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f02 to set video mode, return status. */
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static grub_vbe_status_t
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grub_vbe_bios_set_mode (grub_uint32_t mode,
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struct grub_vbe_crtc_info_block *crtc_info)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f02;
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regs.ebx = mode;
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/* Store *crtc_info to %es:%di. */
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regs.es = (((grub_addr_t) crtc_info) & 0xffff0000) >> 4;
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regs.edi = ((grub_addr_t) crtc_info) & 0xffff;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f03 to return current VBE Mode, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_mode (grub_uint32_t *mode)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f03;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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*mode = regs.ebx & 0xffff;
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return regs.eax & 0xffff;
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}
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grub_vbe_status_t
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grub_vbe_bios_getset_dac_palette_width (int set, int *dac_mask_size)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f08;
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regs.ebx = (*dac_mask_size & 0xff) >> 8;
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regs.ebx = set ? 1 : 0;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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*dac_mask_size = (regs.ebx >> 8) & 0xff;
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f05 to set memory window, return status. */
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grub_vbe_status_t
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grub_vbe_bios_set_memory_window (grub_uint32_t window,
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grub_uint32_t position)
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{
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struct grub_bios_int_registers regs;
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/* BL = window, BH = 0, Set memory window. */
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regs.ebx = window & 0x00ff;
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regs.edx = position;
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regs.eax = 0x4f05;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f05 to return memory window, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_memory_window (grub_uint32_t window,
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grub_uint32_t *position)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f05;
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/* BH = 1, Get memory window. BL = window. */
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regs.ebx = (window & 0x00ff) | 0x100;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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*position = regs.edx & 0xffff;
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f06 to set scanline length (in bytes), return status. */
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grub_vbe_status_t
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grub_vbe_bios_set_scanline_length (grub_uint32_t length)
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{
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struct grub_bios_int_registers regs;
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regs.ecx = length;
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regs.eax = 0x4f06;
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/* BL = 2, Set Scan Line in Bytes. */
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regs.ebx = 0x0002;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f06 to return scanline length (in bytes), return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_scanline_length (grub_uint32_t *length)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f06;
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regs.ebx = 0x0001;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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/* BL = 1, Get Scan Line Length (in bytes). */
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grub_bios_interrupt (0x10, ®s);
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*length = regs.ebx & 0xffff;
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f07 to set display start, return status. */
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static grub_vbe_status_t
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grub_vbe_bios_set_display_start (grub_uint32_t x, grub_uint32_t y)
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{
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struct grub_bios_int_registers regs;
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/* Store x in %ecx. */
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regs.ecx = x;
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regs.edx = y;
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regs.eax = 0x4f07;
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/* BL = 80h, Set Display Start during Vertical Retrace. */
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regs.ebx = 0x0080;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f07 to get display start, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_display_start (grub_uint32_t *x,
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grub_uint32_t *y)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f07;
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/* BL = 1, Get Display Start. */
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regs.ebx = 0x0001;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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*x = regs.ecx & 0xffff;
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*y = regs.edx & 0xffff;
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f0a. */
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grub_vbe_status_t
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grub_vbe_bios_get_pm_interface (grub_uint16_t *segment, grub_uint16_t *offset,
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grub_uint16_t *length)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f0a;
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regs.ebx = 0x0000;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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if ((regs.eax & 0xffff) != GRUB_VBE_STATUS_OK)
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{
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*segment = 0;
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*offset = 0;
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*length = 0;
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}
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*segment = regs.es & 0xffff;
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*offset = regs.edi & 0xffff;
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*length = regs.ecx & 0xffff;
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f11 to get flat panel information, return status. */
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static grub_vbe_status_t
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grub_vbe_bios_get_flat_panel_info (struct grub_vbe_flat_panel_info *flat_panel_info)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f11;
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regs.ebx = 0x0001;
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regs.es = (((grub_addr_t) flat_panel_info) & 0xffff0000) >> 4;
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regs.edi = ((grub_addr_t) flat_panel_info) & 0xffff;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f15 to get DDC availability, return status. */
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static grub_vbe_status_t
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grub_vbe_bios_get_ddc_capabilities (grub_uint8_t *level)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f15;
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regs.ebx = 0x0000;
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regs.ecx = 0x0000;
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regs.es = 0x0000;
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regs.edi = 0x0000;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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*level = regs.ebx & 0xff;
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return regs.eax & 0xffff;
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}
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/* Call VESA BIOS 0x4f15 to read EDID information, return status. */
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static grub_vbe_status_t
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grub_vbe_bios_read_edid (struct grub_video_edid_info *edid_info)
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{
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struct grub_bios_int_registers regs;
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regs.eax = 0x4f15;
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regs.ebx = 0x0001;
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regs.ecx = 0x0000;
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regs.edx = 0x0000;
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regs.es = (((grub_addr_t) edid_info) & 0xffff0000) >> 4;
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regs.edi = ((grub_addr_t) edid_info) & 0xffff;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x10, ®s);
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return regs.eax & 0xffff;
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}
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grub_err_t
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grub_vbe_probe (struct grub_vbe_info_block *info_block)
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{
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struct grub_vbe_info_block *vbe_ib;
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grub_vbe_status_t status;
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/* Clear caller's controller info block. */
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if (info_block)
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grub_memset (info_block, 0, sizeof (*info_block));
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/* Do not probe more than one time, if not necessary. */
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if (vbe_detected == -1 || info_block)
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{
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/* Clear old copy of controller info block. */
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grub_memset (&controller_info, 0, sizeof (controller_info));
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/* Mark VESA BIOS extension as undetected. */
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vbe_detected = 0;
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/* Use low memory scratch area as temporary storage
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for VESA BIOS call. */
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vbe_ib = (struct grub_vbe_info_block *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
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/* Prepare info block. */
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grub_memset (vbe_ib, 0, sizeof (*vbe_ib));
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vbe_ib->signature[0] = 'V';
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vbe_ib->signature[1] = 'B';
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vbe_ib->signature[2] = 'E';
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vbe_ib->signature[3] = '2';
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/* Try to get controller info block. */
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status = grub_vbe_bios_get_controller_info (vbe_ib);
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if (status == GRUB_VBE_STATUS_OK)
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{
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/* Copy it for later usage. */
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grub_memcpy (&controller_info, vbe_ib, sizeof (controller_info));
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/* Mark VESA BIOS extension as detected. */
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vbe_detected = 1;
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}
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}
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if (! vbe_detected)
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return grub_error (GRUB_ERR_BAD_DEVICE, "VESA BIOS Extension not found");
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/* Make copy of controller info block to caller. */
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if (info_block)
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grub_memcpy (info_block, &controller_info, sizeof (*info_block));
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_video_vbe_get_edid (struct grub_video_edid_info *edid_info)
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{
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struct grub_video_edid_info *edid_info_lowmem;
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/* Use low memory scratch area as temporary storage for VESA BIOS calls. */
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edid_info_lowmem =
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(struct grub_video_edid_info *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
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grub_memset (edid_info_lowmem, 0, sizeof (*edid_info_lowmem));
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if (grub_vbe_bios_read_edid (edid_info_lowmem) != GRUB_VBE_STATUS_OK)
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return grub_error (GRUB_ERR_BAD_DEVICE, "EDID information not available");
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grub_memcpy (edid_info, edid_info_lowmem, sizeof (*edid_info));
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return GRUB_ERR_NONE;
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}
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|
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static grub_err_t
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grub_vbe_get_preferred_mode (unsigned int *width, unsigned int *height)
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{
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grub_vbe_status_t status;
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grub_uint8_t ddc_level;
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struct grub_video_edid_info edid_info;
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struct grub_vbe_flat_panel_info *flat_panel_info;
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|
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/* Use low memory scratch area as temporary storage for VESA BIOS calls. */
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flat_panel_info = (struct grub_vbe_flat_panel_info *)
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(GRUB_MEMORY_MACHINE_SCRATCH_ADDR + sizeof (struct grub_video_edid_info));
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grub_memset (flat_panel_info, 0, sizeof (*flat_panel_info));
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|
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if (controller_info.version >= 0x200
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&& (grub_vbe_bios_get_ddc_capabilities (&ddc_level) & 0xff)
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== GRUB_VBE_STATUS_OK)
|
|
{
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if (grub_video_vbe_get_edid (&edid_info) == GRUB_ERR_NONE
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|
&& grub_video_edid_checksum (&edid_info) == GRUB_ERR_NONE
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&& grub_video_edid_preferred_mode (&edid_info, width, height)
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== GRUB_ERR_NONE)
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return GRUB_ERR_NONE;
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|
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grub_errno = GRUB_ERR_NONE;
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}
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|
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status = grub_vbe_bios_get_flat_panel_info (flat_panel_info);
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if (status == GRUB_VBE_STATUS_OK)
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{
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*width = flat_panel_info->horizontal_size;
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|
*height = flat_panel_info->vertical_size;
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "cannot get preferred mode");
|
|
}
|
|
|
|
grub_err_t
|
|
grub_vbe_set_video_mode (grub_uint32_t vbe_mode,
|
|
struct grub_vbe_mode_info_block *vbe_mode_info)
|
|
{
|
|
grub_vbe_status_t status;
|
|
grub_uint32_t old_vbe_mode;
|
|
struct grub_vbe_mode_info_block new_vbe_mode_info;
|
|
grub_err_t err;
|
|
|
|
/* Make sure that VBE is supported. */
|
|
grub_vbe_probe (0);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* Try to get mode info. */
|
|
grub_vbe_get_video_mode_info (vbe_mode, &new_vbe_mode_info);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* For all VESA BIOS modes, force linear frame buffer. */
|
|
if (vbe_mode >= 0x100)
|
|
{
|
|
/* We only want linear frame buffer modes. */
|
|
vbe_mode |= 1 << 14;
|
|
|
|
/* Determine frame buffer pixel format. */
|
|
if (new_vbe_mode_info.memory_model != GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL
|
|
&& new_vbe_mode_info.memory_model
|
|
!= GRUB_VBE_MEMORY_MODEL_DIRECT_COLOR)
|
|
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
|
|
"unsupported pixel format 0x%x",
|
|
new_vbe_mode_info.memory_model);
|
|
}
|
|
|
|
/* Get current mode. */
|
|
grub_vbe_get_video_mode (&old_vbe_mode);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* Try to set video mode. */
|
|
status = grub_vbe_bios_set_mode (vbe_mode, 0);
|
|
if (status != GRUB_VBE_STATUS_OK)
|
|
return grub_error (GRUB_ERR_BAD_DEVICE, "cannot set VBE mode %x", vbe_mode);
|
|
last_set_mode = vbe_mode;
|
|
|
|
if (vbe_mode < 0x100)
|
|
{
|
|
/* If this is not a VESA mode, guess address. */
|
|
framebuffer.ptr = (grub_uint8_t *) 0xa0000;
|
|
}
|
|
else
|
|
{
|
|
framebuffer.ptr = (grub_uint8_t *) new_vbe_mode_info.phys_base_addr;
|
|
}
|
|
|
|
/* Check whether mode is text mode or graphics mode. */
|
|
if (new_vbe_mode_info.memory_model == GRUB_VBE_MEMORY_MODEL_TEXT)
|
|
{
|
|
/* Text mode. */
|
|
|
|
/* No special action needed for text mode as it is not supported for
|
|
graphical support. */
|
|
}
|
|
else
|
|
{
|
|
/* Graphics mode. */
|
|
|
|
/* If video mode is in indexed color, setup default VGA palette. */
|
|
if (vbe_mode < 0x100 || new_vbe_mode_info.memory_model
|
|
== GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL)
|
|
{
|
|
struct grub_vbe_palette_data *palette
|
|
= (struct grub_vbe_palette_data *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
|
|
unsigned i;
|
|
|
|
/* Make sure that the BIOS can reach the palette. */
|
|
for (i = 0; i < GRUB_VIDEO_FBSTD_NUMCOLORS; i++)
|
|
{
|
|
palette[i].red = grub_video_fbstd_colors[i].r;
|
|
palette[i].green = grub_video_fbstd_colors[i].g;
|
|
palette[i].blue = grub_video_fbstd_colors[i].b;
|
|
palette[i].alignment = 0;
|
|
}
|
|
|
|
status = grub_vbe_bios_set_palette_data (GRUB_VIDEO_FBSTD_NUMCOLORS,
|
|
0, palette);
|
|
|
|
/* Just ignore the status. */
|
|
err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
|
|
grub_video_fbstd_colors);
|
|
if (err)
|
|
return err;
|
|
|
|
}
|
|
}
|
|
|
|
/* Copy mode info for caller. */
|
|
if (vbe_mode_info)
|
|
grub_memcpy (vbe_mode_info, &new_vbe_mode_info, sizeof (*vbe_mode_info));
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
grub_err_t
|
|
grub_vbe_get_video_mode (grub_uint32_t *mode)
|
|
{
|
|
grub_vbe_status_t status;
|
|
|
|
/* Make sure that VBE is supported. */
|
|
grub_vbe_probe (0);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* Try to query current mode from VESA BIOS. */
|
|
status = grub_vbe_bios_get_mode (mode);
|
|
/* XXX: ATI cards don't support get_mode. */
|
|
if (status != GRUB_VBE_STATUS_OK)
|
|
*mode = last_set_mode;
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
grub_err_t
|
|
grub_vbe_get_video_mode_info (grub_uint32_t mode,
|
|
struct grub_vbe_mode_info_block *mode_info)
|
|
{
|
|
struct grub_vbe_mode_info_block *mi_tmp
|
|
= (struct grub_vbe_mode_info_block *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
|
|
grub_vbe_status_t status;
|
|
|
|
/* Make sure that VBE is supported. */
|
|
grub_vbe_probe (0);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* If mode is not VESA mode, skip mode info query. */
|
|
if (mode >= 0x100)
|
|
{
|
|
/* Try to get mode info from VESA BIOS. */
|
|
status = grub_vbe_bios_get_mode_info (mode, mi_tmp);
|
|
if (status != GRUB_VBE_STATUS_OK)
|
|
return grub_error (GRUB_ERR_BAD_DEVICE,
|
|
"cannot get information on the mode %x", mode);
|
|
|
|
/* Make copy of mode info block. */
|
|
grub_memcpy (mode_info, mi_tmp, sizeof (*mode_info));
|
|
}
|
|
else
|
|
/* Just clear mode info block if it isn't a VESA mode. */
|
|
grub_memset (mode_info, 0, sizeof (*mode_info));
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_video_vbe_init (void)
|
|
{
|
|
grub_uint16_t *rm_vbe_mode_list;
|
|
grub_uint16_t *p;
|
|
grub_size_t vbe_mode_list_size;
|
|
struct grub_vbe_info_block info_block;
|
|
|
|
/* Check if there is adapter present.
|
|
|
|
Firmware note: There has been a report that some cards store video mode
|
|
list in temporary memory. So we must first use vbe probe to get
|
|
refreshed information to receive valid pointers and data, and then
|
|
copy this information to somewhere safe. */
|
|
grub_vbe_probe (&info_block);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* Copy modelist to local memory. */
|
|
p = rm_vbe_mode_list = real2pm (info_block.video_mode_ptr);
|
|
while(*p++ != 0xFFFF)
|
|
;
|
|
|
|
vbe_mode_list_size = (grub_addr_t) p - (grub_addr_t) rm_vbe_mode_list;
|
|
vbe_mode_list = grub_malloc (vbe_mode_list_size);
|
|
if (! vbe_mode_list)
|
|
return grub_errno;
|
|
grub_memcpy (vbe_mode_list, rm_vbe_mode_list, vbe_mode_list_size);
|
|
|
|
/* Adapter could be found, figure out initial video mode. */
|
|
grub_vbe_get_video_mode (&initial_vbe_mode);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
{
|
|
/* Free allocated resources. */
|
|
grub_free (vbe_mode_list);
|
|
vbe_mode_list = NULL;
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
/* Reset frame buffer. */
|
|
grub_memset (&framebuffer, 0, sizeof(framebuffer));
|
|
|
|
return grub_video_fb_init ();
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_video_vbe_fini (void)
|
|
{
|
|
grub_vbe_status_t status;
|
|
grub_err_t err;
|
|
|
|
/* Restore old video mode. */
|
|
if (last_set_mode != initial_vbe_mode)
|
|
{
|
|
status = grub_vbe_bios_set_mode (initial_vbe_mode, 0);
|
|
if (status != GRUB_VBE_STATUS_OK)
|
|
/* TODO: Decide, is this something we want to do. */
|
|
return grub_errno;
|
|
}
|
|
last_set_mode = initial_vbe_mode;
|
|
|
|
/* TODO: Free any resources allocated by driver. */
|
|
grub_free (vbe_mode_list);
|
|
vbe_mode_list = NULL;
|
|
|
|
err = grub_video_fb_fini ();
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
Set framebuffer render target page and display the proper page, based on
|
|
`doublebuf_state.render_page' and `doublebuf_state.displayed_page',
|
|
respectively.
|
|
*/
|
|
static grub_err_t
|
|
doublebuf_pageflipping_set_page (int page)
|
|
{
|
|
/* Tell the video adapter to display the new front page. */
|
|
int display_start_line
|
|
= framebuffer.mode_info.height * page;
|
|
|
|
grub_vbe_status_t vbe_err =
|
|
grub_vbe_bios_set_display_start (0, display_start_line);
|
|
|
|
if (vbe_err != GRUB_VBE_STATUS_OK)
|
|
return grub_error (GRUB_ERR_IO, "couldn't commit pageflip");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
vbe2videoinfo (grub_uint32_t mode,
|
|
const struct grub_vbe_mode_info_block *vbeinfo,
|
|
struct grub_video_mode_info *mode_info)
|
|
{
|
|
mode_info->mode_number = mode;
|
|
|
|
mode_info->width = vbeinfo->x_resolution;
|
|
mode_info->height = vbeinfo->y_resolution;
|
|
mode_info->mode_type = 0;
|
|
switch (vbeinfo->memory_model)
|
|
{
|
|
case GRUB_VBE_MEMORY_MODEL_TEXT:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_PURE_TEXT;
|
|
break;
|
|
|
|
/* CGA is basically 4-bit packed pixel. */
|
|
case GRUB_VBE_MEMORY_MODEL_CGA:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_CGA;
|
|
case GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
|
|
break;
|
|
|
|
case GRUB_VBE_MEMORY_MODEL_HERCULES:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_HERCULES
|
|
| GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP;
|
|
break;
|
|
|
|
/* Non chain 4 is a special case of planar. */
|
|
case GRUB_VBE_MEMORY_MODEL_NONCHAIN4_256:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_NONCHAIN4;
|
|
case GRUB_VBE_MEMORY_MODEL_PLANAR:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_PLANAR
|
|
| GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
|
|
break;
|
|
|
|
case GRUB_VBE_MEMORY_MODEL_YUV:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_YUV;
|
|
break;
|
|
|
|
case GRUB_VBE_MEMORY_MODEL_DIRECT_COLOR:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_RGB;
|
|
break;
|
|
default:
|
|
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
mode_info->bpp = vbeinfo->bits_per_pixel;
|
|
/* Calculate bytes_per_pixel value. */
|
|
switch(vbeinfo->bits_per_pixel)
|
|
{
|
|
case 32:
|
|
mode_info->bytes_per_pixel = 4;
|
|
break;
|
|
case 24:
|
|
mode_info->bytes_per_pixel = 3;
|
|
break;
|
|
case 16:
|
|
mode_info->bytes_per_pixel = 2;
|
|
break;
|
|
case 15:
|
|
mode_info->bytes_per_pixel = 2;
|
|
break;
|
|
case 8:
|
|
mode_info->bytes_per_pixel = 1;
|
|
break;
|
|
case 4:
|
|
mode_info->bytes_per_pixel = 0;
|
|
break;
|
|
}
|
|
|
|
if (controller_info.version >= 0x300)
|
|
mode_info->pitch = vbeinfo->lin_bytes_per_scan_line;
|
|
else
|
|
mode_info->pitch = vbeinfo->bytes_per_scan_line;
|
|
|
|
mode_info->number_of_colors = 256; /* TODO: fix me. */
|
|
mode_info->red_mask_size = vbeinfo->red_mask_size;
|
|
mode_info->red_field_pos = vbeinfo->red_field_position;
|
|
mode_info->green_mask_size = vbeinfo->green_mask_size;
|
|
mode_info->green_field_pos = vbeinfo->green_field_position;
|
|
mode_info->blue_mask_size = vbeinfo->blue_mask_size;
|
|
mode_info->blue_field_pos = vbeinfo->blue_field_position;
|
|
mode_info->reserved_mask_size = vbeinfo->rsvd_mask_size;
|
|
mode_info->reserved_field_pos = vbeinfo->rsvd_field_position;
|
|
|
|
mode_info->blit_format = grub_video_get_blit_format (mode_info);
|
|
}
|
|
|
|
static int
|
|
grub_video_vbe_iterate (int (*hook) (const struct grub_video_mode_info *info))
|
|
{
|
|
grub_uint16_t *p;
|
|
struct grub_vbe_mode_info_block vbe_mode_info;
|
|
struct grub_video_mode_info mode_info;
|
|
|
|
for (p = vbe_mode_list; *p != 0xFFFF; p++)
|
|
{
|
|
grub_vbe_get_video_mode_info (*p, &vbe_mode_info);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
{
|
|
/* Could not retrieve mode info, retreat. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
break;
|
|
}
|
|
|
|
vbe2videoinfo (*p, &vbe_mode_info, &mode_info);
|
|
if (hook (&mode_info))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_video_vbe_setup (unsigned int width, unsigned int height,
|
|
grub_video_mode_type_t mode_type,
|
|
grub_video_mode_type_t mode_mask)
|
|
{
|
|
grub_uint16_t *p;
|
|
struct grub_vbe_mode_info_block vbe_mode_info;
|
|
struct grub_vbe_mode_info_block best_vbe_mode_info;
|
|
grub_uint32_t best_vbe_mode = 0;
|
|
int depth;
|
|
int preferred_mode = 0;
|
|
|
|
/* Decode depth from mode_type. If it is zero, then autodetect. */
|
|
depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
|
|
>> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
|
|
|
|
if (width == 0 && height == 0)
|
|
{
|
|
grub_vbe_get_preferred_mode (&width, &height);
|
|
if (grub_errno == GRUB_ERR_NONE)
|
|
preferred_mode = 1;
|
|
else
|
|
{
|
|
/* Fall back to 640x480. This is conservative, but the largest
|
|
mode supported by the graphics card may not be safe for the
|
|
display device. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
width = 640;
|
|
height = 480;
|
|
}
|
|
}
|
|
|
|
/* Walk thru mode list and try to find matching mode. */
|
|
for (p = vbe_mode_list; *p != 0xFFFF; p++)
|
|
{
|
|
grub_uint32_t vbe_mode = *p;
|
|
|
|
grub_vbe_get_video_mode_info (vbe_mode, &vbe_mode_info);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
{
|
|
/* Could not retrieve mode info, retreat. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
break;
|
|
}
|
|
|
|
if ((vbe_mode_info.mode_attributes & 0x001) == 0)
|
|
/* If not available, skip it. */
|
|
continue;
|
|
|
|
if ((vbe_mode_info.mode_attributes & 0x008) == 0)
|
|
/* Monochrome is unusable. */
|
|
continue;
|
|
|
|
if ((vbe_mode_info.mode_attributes & 0x080) == 0)
|
|
/* We support only linear frame buffer modes. */
|
|
continue;
|
|
|
|
if ((vbe_mode_info.mode_attributes & 0x010) == 0)
|
|
/* We allow only graphical modes. */
|
|
continue;
|
|
|
|
if ((vbe_mode_info.memory_model != GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL)
|
|
&& (vbe_mode_info.memory_model != GRUB_VBE_MEMORY_MODEL_DIRECT_COLOR))
|
|
/* Not compatible memory model. */
|
|
continue;
|
|
|
|
if (vbe_mode_info.bits_per_pixel != 8
|
|
&& vbe_mode_info.bits_per_pixel != 15
|
|
&& vbe_mode_info.bits_per_pixel != 16
|
|
&& vbe_mode_info.bits_per_pixel != 24
|
|
&& vbe_mode_info.bits_per_pixel != 32)
|
|
/* Unsupported bitdepth . */
|
|
continue;
|
|
|
|
if (preferred_mode)
|
|
{
|
|
if (vbe_mode_info.x_resolution > width
|
|
|| vbe_mode_info.y_resolution > height)
|
|
/* Resolution exceeds that of preferred mode. */
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
if (((vbe_mode_info.x_resolution != width)
|
|
|| (vbe_mode_info.y_resolution != height))
|
|
&& width != 0 && height != 0)
|
|
/* Non matching resolution. */
|
|
continue;
|
|
}
|
|
|
|
/* Check if user requested RGB or index color mode. */
|
|
if ((mode_mask & GRUB_VIDEO_MODE_TYPE_COLOR_MASK) != 0)
|
|
{
|
|
unsigned my_mode_type = 0;
|
|
|
|
if (vbe_mode_info.memory_model == GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL)
|
|
my_mode_type |= GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
|
|
|
|
if (vbe_mode_info.memory_model == GRUB_VBE_MEMORY_MODEL_DIRECT_COLOR)
|
|
my_mode_type |= GRUB_VIDEO_MODE_TYPE_RGB;
|
|
|
|
if ((my_mode_type & mode_mask
|
|
& (GRUB_VIDEO_MODE_TYPE_RGB | GRUB_VIDEO_MODE_TYPE_INDEX_COLOR))
|
|
!= (mode_type & mode_mask
|
|
& (GRUB_VIDEO_MODE_TYPE_RGB
|
|
| GRUB_VIDEO_MODE_TYPE_INDEX_COLOR)))
|
|
continue;
|
|
}
|
|
|
|
/* If there is a request for specific depth, ignore others. */
|
|
if ((depth != 0) && (vbe_mode_info.bits_per_pixel != depth))
|
|
continue;
|
|
|
|
/* Select mode with most of "volume" (size of framebuffer in bits). */
|
|
if (best_vbe_mode != 0)
|
|
if ((grub_uint64_t) vbe_mode_info.bits_per_pixel
|
|
* vbe_mode_info.x_resolution * vbe_mode_info.y_resolution
|
|
< (grub_uint64_t) best_vbe_mode_info.bits_per_pixel
|
|
* best_vbe_mode_info.x_resolution * best_vbe_mode_info.y_resolution)
|
|
continue;
|
|
|
|
/* Save so far best mode information for later use. */
|
|
best_vbe_mode = vbe_mode;
|
|
grub_memcpy (&best_vbe_mode_info, &vbe_mode_info, sizeof (vbe_mode_info));
|
|
}
|
|
|
|
/* Try to initialize best mode found. */
|
|
if (best_vbe_mode != 0)
|
|
{
|
|
grub_err_t err;
|
|
static struct grub_vbe_mode_info_block active_vbe_mode_info;
|
|
/* If this fails, then we have mode selection heuristics problem,
|
|
or adapter failure. */
|
|
grub_vbe_set_video_mode (best_vbe_mode, &active_vbe_mode_info);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
return grub_errno;
|
|
|
|
/* Fill mode info details. */
|
|
vbe2videoinfo (best_vbe_mode, &active_vbe_mode_info,
|
|
&framebuffer.mode_info);
|
|
|
|
{
|
|
/* Get video RAM size in bytes. */
|
|
grub_size_t vram_size = controller_info.total_memory << 16;
|
|
grub_size_t page_size; /* The size of a page in bytes. */
|
|
|
|
page_size = framebuffer.mode_info.pitch * framebuffer.mode_info.height;
|
|
|
|
if (vram_size >= 2 * page_size)
|
|
err = grub_video_fb_setup (mode_type, mode_mask,
|
|
&framebuffer.mode_info,
|
|
framebuffer.ptr,
|
|
doublebuf_pageflipping_set_page,
|
|
framebuffer.ptr + page_size);
|
|
else
|
|
err = grub_video_fb_setup (mode_type, mode_mask,
|
|
&framebuffer.mode_info,
|
|
framebuffer.ptr, 0, 0);
|
|
}
|
|
|
|
/* Copy default palette to initialize emulated palette. */
|
|
err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
|
|
grub_video_fbstd_colors);
|
|
return err;
|
|
}
|
|
|
|
/* Couldn't found matching mode. */
|
|
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no matching mode found");
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_video_vbe_set_palette (unsigned int start, unsigned int count,
|
|
struct grub_video_palette_data *palette_data)
|
|
{
|
|
if (framebuffer.mode_info.mode_type == GRUB_VIDEO_MODE_TYPE_INDEX_COLOR)
|
|
{
|
|
/* TODO: Implement setting indexed color mode palette to hardware. */
|
|
//status = grub_vbe_bios_set_palette_data (sizeof (vga_colors)
|
|
// / sizeof (struct grub_vbe_palette_data),
|
|
// 0,
|
|
// palette);
|
|
|
|
}
|
|
|
|
/* Then set color to emulated palette. */
|
|
|
|
return grub_video_fb_set_palette (start, count, palette_data);
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_video_vbe_get_info_and_fini (struct grub_video_mode_info *mode_info,
|
|
void **framebuf)
|
|
{
|
|
grub_free (vbe_mode_list);
|
|
vbe_mode_list = NULL;
|
|
return grub_video_fb_get_info_and_fini (mode_info, framebuf);
|
|
}
|
|
|
|
static void
|
|
grub_video_vbe_print_adapter_specific_info (void)
|
|
{
|
|
grub_printf (" VBE info: version: %d.%d OEM software rev: %d.%d\n",
|
|
controller_info.version >> 8,
|
|
controller_info.version & 0xFF,
|
|
controller_info.oem_software_rev >> 8,
|
|
controller_info.oem_software_rev & 0xFF);
|
|
|
|
/* The total_memory field is in 64 KiB units. */
|
|
grub_printf (" total memory: %d KiB\n",
|
|
(controller_info.total_memory << 16) / 1024);
|
|
}
|
|
|
|
static struct grub_video_adapter grub_video_vbe_adapter =
|
|
{
|
|
.name = "VESA BIOS Extension Video Driver",
|
|
.id = GRUB_VIDEO_DRIVER_VBE,
|
|
|
|
.prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE,
|
|
|
|
.init = grub_video_vbe_init,
|
|
.fini = grub_video_vbe_fini,
|
|
.setup = grub_video_vbe_setup,
|
|
.get_info = grub_video_fb_get_info,
|
|
.get_info_and_fini = grub_video_vbe_get_info_and_fini,
|
|
.set_palette = grub_video_vbe_set_palette,
|
|
.get_palette = grub_video_fb_get_palette,
|
|
.set_viewport = grub_video_fb_set_viewport,
|
|
.get_viewport = grub_video_fb_get_viewport,
|
|
.map_color = grub_video_fb_map_color,
|
|
.map_rgb = grub_video_fb_map_rgb,
|
|
.map_rgba = grub_video_fb_map_rgba,
|
|
.unmap_color = grub_video_fb_unmap_color,
|
|
.fill_rect = grub_video_fb_fill_rect,
|
|
.blit_bitmap = grub_video_fb_blit_bitmap,
|
|
.blit_render_target = grub_video_fb_blit_render_target,
|
|
.scroll = grub_video_fb_scroll,
|
|
.swap_buffers = grub_video_fb_swap_buffers,
|
|
.create_render_target = grub_video_fb_create_render_target,
|
|
.delete_render_target = grub_video_fb_delete_render_target,
|
|
.set_active_render_target = grub_video_fb_set_active_render_target,
|
|
.get_active_render_target = grub_video_fb_get_active_render_target,
|
|
.iterate = grub_video_vbe_iterate,
|
|
.get_edid = grub_video_vbe_get_edid,
|
|
.print_adapter_specific_info = grub_video_vbe_print_adapter_specific_info,
|
|
|
|
.next = 0
|
|
};
|
|
|
|
GRUB_MOD_INIT(video_i386_pc_vbe)
|
|
{
|
|
grub_video_register (&grub_video_vbe_adapter);
|
|
}
|
|
|
|
GRUB_MOD_FINI(video_i386_pc_vbe)
|
|
{
|
|
grub_video_unregister (&grub_video_vbe_adapter);
|
|
}
|