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);