Updated PCI IDs to latest snapshot.
[tangerine.git] / arch / common / boot / grub2 / commands / i386 / pc / vbetest.c
blob570421dd8e92d153434dffae2409151750647062
1 /* vbetest.c - command to test VESA BIOS Extension 2.0+ support. */
2 /*
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2005,2007 Free Software Foundation, Inc.
6 * GRUB is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * GRUB is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
20 #include <grub/normal.h>
21 #include <grub/dl.h>
22 #include <grub/arg.h>
23 #include <grub/env.h>
24 #include <grub/misc.h>
25 #include <grub/term.h>
26 #include <grub/machine/init.h>
27 #include <grub/machine/vbe.h>
28 #include <grub/err.h>
30 static grub_err_t
31 grub_cmd_vbetest (struct grub_arg_list *state __attribute__ ((unused)),
32 int argc __attribute__ ((unused)),
33 char **args __attribute__ ((unused)))
35 grub_err_t err;
36 char *modevar;
37 struct grub_vbe_mode_info_block mode_info;
38 struct grub_vbe_info_block controller_info;
39 grub_uint32_t use_mode = GRUB_VBE_DEFAULT_VIDEO_MODE;
40 grub_uint32_t old_mode;
41 grub_uint8_t *framebuffer = 0;
42 grub_uint32_t bytes_per_scan_line = 0;
43 unsigned char *ptr;
44 int i;
46 grub_printf ("Probing for VESA BIOS Extension ... ");
48 /* Check if VESA BIOS exists. */
49 err = grub_vbe_probe (&controller_info);
50 if (err != GRUB_ERR_NONE)
51 return err;
53 grub_printf ("found!\n");
55 /* Dump out controller information. */
56 grub_printf ("VBE signature = %c%c%c%c\n",
57 controller_info.signature[0],
58 controller_info.signature[1],
59 controller_info.signature[2],
60 controller_info.signature[3]);
62 grub_printf ("VBE version = %d.%d\n",
63 controller_info.version >> 8,
64 controller_info.version & 0xFF);
65 grub_printf ("OEM string ptr = %08x\n",
66 controller_info.oem_string_ptr);
67 grub_printf ("Total memory = %d\n",
68 controller_info.total_memory);
70 err = grub_vbe_get_video_mode (&old_mode);
71 grub_printf ("Get video mode err = %04x\n", err);
73 if (err == GRUB_ERR_NONE)
74 grub_printf ("Old video mode = %04x\n", old_mode);
75 else
76 grub_errno = GRUB_ERR_NONE;
78 /* Check existence of vbe_mode environment variable. */
79 modevar = grub_env_get ("vbe_mode");
80 if (modevar != 0)
82 unsigned long value;
84 value = grub_strtoul (modevar, 0, 0);
85 if (grub_errno == GRUB_ERR_NONE)
86 use_mode = value;
87 else
88 grub_errno = GRUB_ERR_NONE;
91 err = grub_vbe_get_video_mode_info (use_mode, &mode_info);
92 if (err != GRUB_ERR_NONE)
93 return err;
95 /* Dump out details about the mode being tested. */
96 grub_printf ("mode: 0x%03x\n",
97 use_mode);
98 grub_printf ("width : %d\n",
99 mode_info.x_resolution);
100 grub_printf ("height: %d\n",
101 mode_info.y_resolution);
102 grub_printf ("memory model: %02x\n",
103 mode_info.memory_model);
104 grub_printf ("bytes/scanline: %d\n",
105 mode_info.bytes_per_scan_line);
106 grub_printf ("bytes/scanline (lin): %d\n",
107 mode_info.lin_bytes_per_scan_line);
108 grub_printf ("base address: %08x\n",
109 mode_info.phys_base_addr);
110 grub_printf ("red mask/pos: %d/%d\n",
111 mode_info.red_mask_size,
112 mode_info.red_field_position);
113 grub_printf ("green mask/pos: %d/%d\n",
114 mode_info.green_mask_size,
115 mode_info.green_field_position);
116 grub_printf ("blue mask/pos: %d/%d\n",
117 mode_info.blue_mask_size,
118 mode_info.blue_field_position);
120 grub_printf ("Press any key to continue.\n");
122 grub_getkey ();
124 /* Setup GFX mode. */
125 err = grub_vbe_set_video_mode (use_mode, &mode_info);
126 if (err != GRUB_ERR_NONE)
127 return err;
129 /* Determine framebuffer address and how many bytes are in scan line. */
130 framebuffer = (grub_uint8_t *) mode_info.phys_base_addr;
131 ptr = framebuffer;
133 if (controller_info.version >= 0x300)
135 bytes_per_scan_line = mode_info.lin_bytes_per_scan_line;
137 else
139 bytes_per_scan_line = mode_info.bytes_per_scan_line;
142 /* Draw some random data to screen. */
143 for (i = 0; i < 256 * 256; i++)
145 ptr[i] = i & 0x0F;
148 /* Draw white line to screen. */
149 for (i = 0; i < 100; i++)
151 ptr[mode_info.bytes_per_scan_line * 50 + i] = 0x0F;
154 /* Draw another white line to screen. */
155 grub_memset (ptr + bytes_per_scan_line * 51, 0x0f, bytes_per_scan_line);
157 grub_getkey ();
159 /* Restore old video mode. */
160 grub_vbe_set_video_mode (old_mode, 0);
162 return grub_errno;
165 GRUB_MOD_INIT(vbetest)
167 (void) mod; /* To stop warning. */
168 grub_register_command ("vbetest",
169 grub_cmd_vbetest,
170 GRUB_COMMAND_FLAG_BOTH,
171 "vbetest",
172 "Test VESA BIOS Extension 2.0+ support",
176 GRUB_MOD_FINI(vbetest)
178 grub_unregister_command ("vbetest");