1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 1999-2008 H. Peter Anvin - All Rights Reserved 4 * 5 * Permission is hereby granted, free of charge, to any person 6 * obtaining a copy of this software and associated documentation 7 * files (the "Software"), to deal in the Software without 8 * restriction, including without limitation the rights to use, 9 * copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom 11 * the Software is furnished to do so, subject to the following 12 * conditions: 13 * 14 * The above copyright notice and this permission notice shall 15 * be included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * ----------------------------------------------------------------------- */ 27 28 /* 29 * initvesa.c 30 * 31 * Query the VESA BIOS and select a 640x480x32 mode with local mapping 32 * support, if one exists. 33 */ 34 35 #include <inttypes.h> 36 #include <com32.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <sys/fpu.h> 40 #include <syslinux/video.h> 41 #include "vesa.h" 42 #include "video.h" 43 #include "fill.h" 44 #include "debug.h" 45 46 struct vesa_info __vesa_info; 47 48 struct vesa_char *__vesacon_text_display; 49 50 int __vesacon_font_height; 51 int __vesacon_text_rows; 52 int __vesacon_text_cols; 53 enum vesa_pixel_format __vesacon_pixel_format = PXF_NONE; 54 unsigned int __vesacon_bytes_per_pixel; 55 uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT]; 56 57 uint32_t *__vesacon_background, *__vesacon_shadowfb; 58 59 static void unpack_font(uint8_t * dst, uint8_t * src, int height) 60 { 61 int i; 62 63 for (i = 0; i < FONT_MAX_CHARS; i++) { 64 memcpy(dst, src, height); 65 memset(dst + height, 0, FONT_MAX_HEIGHT - height); 66 67 dst += FONT_MAX_HEIGHT; 68 src += height; 69 } 70 } 71 72 static int vesacon_set_mode(int *x, int *y) 73 { 74 uint8_t *rom_font; 75 struct vesa_mode_info *mi; 76 enum vesa_pixel_format bestpxf; 77 int rv; 78 79 debug("Hello, World!\r\n"); 80 81 /* Free any existing data structures */ 82 if (__vesacon_background) { 83 free(__vesacon_background); 84 __vesacon_background = NULL; 85 } 86 if (__vesacon_shadowfb) { 87 free(__vesacon_shadowfb); 88 __vesacon_shadowfb = NULL; 89 } 90 91 rv = firmware->vesa->set_mode(&__vesa_info, x, y, &bestpxf); 92 if (rv) 93 return rv; 94 95 mi = &__vesa_info.mi; 96 __vesacon_bytes_per_pixel = (mi->bpp + 7) >> 3; 97 __vesacon_format_pixels = __vesacon_format_pixels_list[bestpxf]; 98 99 /* Download the SYSLINUX- or firmware-provided font */ 100 __vesacon_font_height = syslinux_font_query(&rom_font); 101 if (!__vesacon_font_height) 102 __vesacon_font_height = firmware->vesa->font_query(&rom_font); 103 104 unpack_font((uint8_t *) __vesacon_graphics_font, rom_font, 105 __vesacon_font_height); 106 107 __vesacon_background = calloc(mi->h_res*mi->v_res, 4); 108 __vesacon_shadowfb = calloc(mi->h_res*mi->v_res, 4); 109 110 __vesacon_init_copy_to_screen(); 111 112 /* Tell syslinux we changed video mode */ 113 /* In theory this should be: 114 115 flags = (mi->mode_attr & 4) ? 0x0007 : 0x000f; 116 117 However, that would assume all systems that claim to handle text 118 output in VESA modes actually do that... */ 119 syslinux_report_video_mode(0x000f, mi->h_res, mi->v_res); 120 121 __vesacon_pixel_format = bestpxf; 122 123 return 0; 124 } 125 126 /* FIXME: 127 * Does init_text_display need an EFI counterpart? 128 * e.g. vesa_char may need to setup UNICODE char for EFI 129 * and the number of screen chars may need to be sized up 130 * accordingly. This may also require turning byte strings 131 * into unicode strings in the framebuffer 132 * Possibly, revisit vesacon_fill() for EFI. 133 */ 134 static int init_text_display(void) 135 { 136 size_t nchars; 137 struct vesa_char *ptr; 138 struct vesa_char def_char = { 139 .ch = ' ', 140 .attr = 0, 141 }; 142 143 if (__vesacon_text_display) 144 free(__vesacon_text_display); 145 146 __vesacon_text_cols = TEXT_PIXEL_COLS / FONT_WIDTH; 147 __vesacon_text_rows = TEXT_PIXEL_ROWS / __vesacon_font_height; 148 nchars = (__vesacon_text_cols+2) * (__vesacon_text_rows+2); 149 150 __vesacon_text_display = ptr = malloc(nchars * sizeof(struct vesa_char)); 151 152 if (!ptr) 153 return -1; 154 155 vesacon_fill(ptr, def_char, nchars); 156 __vesacon_init_cursor(__vesacon_font_height); 157 158 return 0; 159 } 160 161 /* 162 * On input, VESA initialization is passed a desirable resolution. On 163 * return, either the requested resolution is set or the system 164 * supported default resolution is set and returned to the caller. 165 */ 166 int __vesacon_init(int *x, int *y) 167 { 168 int rv; 169 170 /* We need the FPU for graphics, at least libpng et al will need it... */ 171 if (x86_init_fpu()) 172 return 10; 173 174 rv = vesacon_set_mode(x, y); 175 if (rv) { 176 /* Try to see if we can just patch the BIOS... */ 177 if (__vesacon_i915resolution(*x, *y)) 178 return rv; 179 if (vesacon_set_mode(x, y)) 180 return rv; 181 } 182 183 init_text_display(); 184 185 debug("Mode set, now drawing at %#p\r\n", __vesa_info.mi.lfb_ptr); 186 187 __vesacon_init_background(); 188 189 debug("Ready!\r\n"); 190 return 0; 191 } 192
