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Merge branch 'master' of git://git.denx.de/u-boot-video
[karo-tx-uboot.git] / drivers / video / coreboot_fb.c
1 /*
2  * coreboot Framebuffer driver.
3  *
4  * Copyright (C) 2011 The Chromium OS authors
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation; either version 2 of
12  * the License, or (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22  * MA 02111-1307 USA
23  */
24
25 #include <common.h>
26 #include <asm/arch/tables.h>
27 #include <asm/arch/sysinfo.h>
28 #include <video_fb.h>
29 #include "videomodes.h"
30
31 /*
32  * The Graphic Device
33  */
34 GraphicDevice ctfb;
35
36 static int parse_coreboot_table_fb(GraphicDevice *gdev)
37 {
38         struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
39
40         /* If there is no framebuffer structure, bail out and keep
41          * running on the serial console.
42          */
43         if (!fb)
44                 return 0;
45
46         gdev->winSizeX = fb->x_resolution;
47         gdev->winSizeY = fb->y_resolution;
48
49         gdev->plnSizeX = fb->x_resolution;
50         gdev->plnSizeY = fb->y_resolution;
51
52         gdev->gdfBytesPP = fb->bits_per_pixel / 8;
53
54         switch (fb->bits_per_pixel) {
55         case 24:
56                 gdev->gdfIndex = GDF_32BIT_X888RGB;
57                 break;
58         case 16:
59                 gdev->gdfIndex = GDF_16BIT_565RGB;
60                 break;
61         default:
62                 gdev->gdfIndex = GDF__8BIT_INDEX;
63                 break;
64         }
65
66         gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
67         gdev->pciBase = (unsigned int)fb->physical_address;
68
69         gdev->frameAdrs = (unsigned int)fb->physical_address;
70         gdev->memSize = fb->bytes_per_line * fb->y_resolution;
71
72         gdev->vprBase = (unsigned int)fb->physical_address;
73         gdev->cprBase = (unsigned int)fb->physical_address;
74
75         return 1;
76 }
77
78 void *video_hw_init(void)
79 {
80         GraphicDevice *gdev = &ctfb;
81         int bits_per_pixel;
82
83         printf("Video: ");
84
85         if (!parse_coreboot_table_fb(gdev)) {
86                 printf("No video mode configured in coreboot!\n");
87                 return NULL;
88         }
89
90         bits_per_pixel = gdev->gdfBytesPP * 8;
91
92         /* fill in Graphic device struct */
93         sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
94                  bits_per_pixel);
95         printf("%s\n", gdev->modeIdent);
96
97         memset((void *)gdev->pciBase, 0,
98                 gdev->winSizeX * gdev->winSizeY * gdev->gdfBytesPP);
99
100         return (void *)gdev;
101 }