1 /*
2 * linux/drivers/video/mfb.c -- Low level frame buffer operations for
3 * monochrome
4 *
5 * Created 5 Apr 1997 by Geert Uytterhoeven
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
9 * more details.
10 */
11
12 #include <linux/module.h>
13 #include <linux/string.h>
14 #include <linux/fb.h>
15
16 #include "atafb.h"
17 #include "atafb_utils.h"
18
19
20 /*
21 * Monochrome
22 */
23
atafb_mfb_copyarea(struct fb_info * info,u_long next_line,int sy,int sx,int dy,int dx,int height,int width)24 void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
25 int sy, int sx, int dy, int dx,
26 int height, int width)
27 {
28 u8 *src, *dest;
29 u_int rows;
30
31 if (sx == 0 && dx == 0 && width == next_line) {
32 src = (u8 *)info->screen_base + sy * (width >> 3);
33 dest = (u8 *)info->screen_base + dy * (width >> 3);
34 fb_memmove(dest, src, height * (width >> 3));
35 } else if (dy <= sy) {
36 src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
37 dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
38 for (rows = height; rows--;) {
39 fb_memmove(dest, src, width >> 3);
40 src += next_line;
41 dest += next_line;
42 }
43 } else {
44 src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
45 dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
46 for (rows = height; rows--;) {
47 fb_memmove(dest, src, width >> 3);
48 src -= next_line;
49 dest -= next_line;
50 }
51 }
52 }
53
atafb_mfb_fillrect(struct fb_info * info,u_long next_line,u32 color,int sy,int sx,int height,int width)54 void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
55 int sy, int sx, int height, int width)
56 {
57 u8 *dest;
58 u_int rows;
59
60 dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
61
62 if (sx == 0 && width == next_line) {
63 if (color)
64 fb_memset255(dest, height * (width >> 3));
65 else
66 fb_memclear(dest, height * (width >> 3));
67 } else {
68 for (rows = height; rows--; dest += next_line) {
69 if (color)
70 fb_memset255(dest, width >> 3);
71 else
72 fb_memclear_small(dest, width >> 3);
73 }
74 }
75 }
76
atafb_mfb_linefill(struct fb_info * info,u_long next_line,int dy,int dx,u32 width,const u8 * data,u32 bgcolor,u32 fgcolor)77 void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
78 int dy, int dx, u32 width,
79 const u8 *data, u32 bgcolor, u32 fgcolor)
80 {
81 u8 *dest;
82 u_int rows;
83
84 dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
85
86 for (rows = width / 8; rows--; /* check margins */ ) {
87 // use fast_memmove or fb_memmove
88 *dest++ = *data++;
89 }
90 }
91
92 #ifdef MODULE
93 MODULE_LICENSE("GPL");
94
init_module(void)95 int init_module(void)
96 {
97 return 0;
98 }
99
cleanup_module(void)100 void cleanup_module(void)
101 {
102 }
103 #endif /* MODULE */
104
105
106 /*
107 * Visible symbols for modules
108 */
109
110 EXPORT_SYMBOL(atafb_mfb_copyarea);
111 EXPORT_SYMBOL(atafb_mfb_fillrect);
112 EXPORT_SYMBOL(atafb_mfb_linefill);
113