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// Option rom scanning code.
//
// Copyright (C) 2009-2010 coresystems GmbH
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "bregs.h" // struct bregs
#include "farptr.h" // FLATPTR_TO_SEG
#include "config.h" // CONFIG_*
#include "util.h" // dprintf
#include "jpeg.h" // splash
/****************************************************************
* Definitions
****************************************************************/
/****************************************************************
* VESA structures
****************************************************************/
struct vesa_info
{
u8 vesa_signature[4];
u16 vesa_version;
u32 oem_string_ptr;
u8 capabilities[4];
u32 video_mode_ptr;
u16 total_memory;
u16 oem_software_rev;
u32 oem_vendor_name_ptr;
u32 oem_product_name_ptr;
u32 oem_product_rev_ptr;
u8 reserved[222];
u8 oem_data[256];
} PACKED;
struct vesa_mode_info
{
u16 mode_attributes;
u8 win_a_attributes;
u8 win_b_attributes;
u16 win_granularity;
u16 win_size;
u16 win_a_segment;
u16 win_b_segment;
u32 win_func_ptr;
u16 bytes_per_scanline;
u16 x_resolution;
u16 y_resolution;
u8 x_charsize;
u8 y_charsize;
u8 number_of_planes;
u8 bits_per_pixel;
u8 number_of_banks;
u8 memory_model;
u8 bank_size;
u8 number_of_image_pages;
u8 reserved_page;
u8 red_mask_size;
u8 red_mask_pos;
u8 green_mask_size;
u8 green_mask_pos;
u8 blue_mask_size;
u8 blue_mask_pos;
u8 reserved_mask_size;
u8 reserved_mask_pos;
u8 direct_color_mode_info;
u32 phys_base_ptr;
u32 offscreen_mem_offset;
u16 offscreen_mem_size;
u8 reserved[206];
} PACKED;
/****************************************************************
* Helper functions
****************************************************************/
/****************************************************************
* VGA text / graphics console
****************************************************************/
static void enable_vga_text_console(void)
{
dprintf(1, "Turning on vga text mode console\n");
struct bregs br;
/* Enable VGA text mode */
memset(&br, 0, sizeof(br));
br.flags = F_IF;
br.ax = 0x0003;
start_preempt();
call16_int(0x10, &br);
finish_preempt();
if (CONFIG_BOOTSPLASH) {
/* Switch back to start of the framebuffer
* (disable "double buffering")
*/
memset(&br, 0, sizeof(br));
br.flags = F_IF;
br.ax = 0x4f07;
br.bl = 0x02;
br.ecx = 0;
start_preempt();
call16_int(0x10, &br);
finish_preempt();
}
// Write to screen.
printf("Starting SeaBIOS (version %s)\n\n", VERSION);
}
void enable_vga_console(void)
{
/* Needs coreboot support for CBFS */
if (!CONFIG_BOOTSPLASH || !CONFIG_COREBOOT) {
enable_vga_text_console();
return;
}
struct bregs br;
struct vesa_info *vesa_info;
struct vesa_mode_info *mode_info;
struct jpeg_decdata *decdata;
vesa_info = malloc_tmphigh(sizeof(*vesa_info));
mode_info = malloc_tmphigh(sizeof(*mode_info));
decdata = malloc_tmphigh(sizeof(*decdata));
/* Check whether we have a VESA 2.0 compliant BIOS */
memset(vesa_info, 0, sizeof(struct vesa_info));
memcpy(vesa_info, "VBE2", 4);
memset(&br, 0, sizeof(br));
br.flags = F_IF;
br.ax = 0x4f00;
br.di = FLATPTR_TO_OFFSET(vesa_info);
br.es = FLATPTR_TO_SEG(vesa_info);
start_preempt();
call16_int(0x10, &br);
finish_preempt();
if(strcmp("VESA", (char *)vesa_info) != 0) {
dprintf(1,"No VBE2 found.\n");
goto cleanup;
}
/* Print some debugging information about our card. */
char *vendor, *product;
vendor = (char *)(((vesa_info->oem_vendor_name_ptr & 0xffff0000) >> 12) |
(vesa_info->oem_vendor_name_ptr & 0xffff));
product = (char *)(((vesa_info->oem_product_name_ptr & 0xffff0000) >> 12) |
(vesa_info->oem_product_name_ptr & 0xffff));
dprintf(8, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n",
vesa_info->vesa_version>>8,vesa_info->vesa_version&0xff,
vendor, product);
/* Get information about our graphics mode, like the
* framebuffer start address
*/
memset(&br, 0, sizeof(br));
br.flags = F_IF;
br.ax = 0x4f01;
br.cx = (1 << 14) | CONFIG_BOOTSPLASH_VESA_MODE;
br.di = FLATPTR_TO_OFFSET(mode_info);
br.es = FLATPTR_TO_SEG(mode_info);
start_preempt();
call16_int(0x10, &br);
finish_preempt();
if (br.ax != 0x4f) {
dprintf(1, "get_mode failed.\n");
enable_vga_text_console();
goto cleanup;
}
unsigned char *framebuffer = (unsigned char *) (mode_info->phys_base_ptr);
/* Switch to graphics mode */
memset(&br, 0, sizeof(br));
br.flags = F_IF;
br.ax = 0x4f02;
br.bx = (1 << 14) | CONFIG_BOOTSPLASH_VESA_MODE;
start_preempt();
call16_int(0x10, &br);
finish_preempt();
if (br.ax != 0x4f) {
dprintf(1, "set_mode failed.\n");
enable_vga_text_console();
goto cleanup;
}
/* Switching Intel IGD to 1MB video memory will break this. Who cares. */
int imagesize = CONFIG_BOOTSPLASH_X * CONFIG_BOOTSPLASH_Y *
(CONFIG_BOOTSPLASH_DEPTH / 8);
/* We use "double buffering" to make things look nicer */
framebuffer += imagesize;
dprintf(9, "framebuffer: %x\n", (u32)framebuffer);
dprintf(9, "bytes per scanline: %d\n", mode_info->bytes_per_scanline);
dprintf(9, "bits per pixel: %d\n", mode_info->bits_per_pixel);
/* Look for bootsplash.jpg in CBFS and decompress it... */
int ret = 0;
unsigned char *jpeg = NULL;
struct cbfs_file *file = cbfs_finddatafile("bootsplash.jpg");
int filesize = 0;
if (file) {
filesize = cbfs_datasize(file);
jpeg = malloc_tmphigh(filesize);
} else {
dprintf(1, "Could not find boot splash screen \"bootsplash.jpg\"\n");
}
if(jpeg) {
dprintf(9, "Copying boot splash screen...\n");
cbfs_copyfile(file, jpeg, filesize);
dprintf(9, "Decompressing boot splash screen...\n");
start_preempt();
ret = jpeg_decode(jpeg, framebuffer, CONFIG_BOOTSPLASH_X,
CONFIG_BOOTSPLASH_Y, CONFIG_BOOTSPLASH_DEPTH, decdata);
finish_preempt();
if (ret)
dprintf(1, "Failed with return code %x...\n", ret);
} else {
ret = -1;
}
free(jpeg);
if (ret) {
enable_vga_text_console();
goto cleanup;
}
/* Show the picture */
memset(&br, 0, sizeof(br));
br.flags = F_IF;
br.ax = 0x4f07;
br.bl = 0x02;
br.ecx = imagesize;
start_preempt();
call16_int(0x10, &br);
finish_preempt();
if (br.ax != 0x4f) {
dprintf(1, "display_start failed.\n");
enable_vga_text_console();
}
cleanup:
free (vesa_info);
free (mode_info);
free (decdata);
}
void
disable_bootsplash(void)
{
if (! CONFIG_BOOTSPLASH)
return;
enable_vga_text_console();
}
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