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
24void 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
54void 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
77void 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
93MODULE_LICENSE("GPL");
94
95int init_module(void)
96{
97	return 0;
98}
99
100void cleanup_module(void)
101{
102}
103#endif /* MODULE */
104
105
106    /*
107     *  Visible symbols for modules
108     */
109
110EXPORT_SYMBOL(atafb_mfb_copyarea);
111EXPORT_SYMBOL(atafb_mfb_fillrect);
112EXPORT_SYMBOL(atafb_mfb_linefill);
113