| /* |
| * linux/drivers/video/mfb.c -- Low level frame buffer operations for |
| * monochrome |
| * |
| * Created 5 Apr 1997 by Geert Uytterhoeven |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file COPYING in the main directory of this archive for |
| * more details. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/tty.h> |
| #include <linux/console.h> |
| #include <linux/string.h> |
| #include <linux/fb.h> |
| |
| #include <video/fbcon.h> |
| #include <video/fbcon-mfb.h> |
| |
| |
| /* |
| * Monochrome |
| */ |
| |
| void fbcon_mfb_setup(struct display *p) |
| { |
| if (p->line_length) |
| p->next_line = p->line_length; |
| else |
| p->next_line = p->var.xres_virtual>>3; |
| p->next_plane = 0; |
| } |
| |
| void fbcon_mfb_bmove(struct display *p, int sy, int sx, int dy, int dx, |
| int height, int width) |
| { |
| u8 *src, *dest; |
| u_int rows; |
| |
| if (sx == 0 && dx == 0 && width == p->next_line) { |
| src = p->screen_base+sy*fontheight(p)*width; |
| dest = p->screen_base+dy*fontheight(p)*width; |
| fb_memmove(dest, src, height*fontheight(p)*width); |
| } else if (dy <= sy) { |
| src = p->screen_base+sy*fontheight(p)*p->next_line+sx; |
| dest = p->screen_base+dy*fontheight(p)*p->next_line+dx; |
| for (rows = height*fontheight(p); rows--;) { |
| fb_memmove(dest, src, width); |
| src += p->next_line; |
| dest += p->next_line; |
| } |
| } else { |
| src = p->screen_base+((sy+height)*fontheight(p)-1)*p->next_line+sx; |
| dest = p->screen_base+((dy+height)*fontheight(p)-1)*p->next_line+dx; |
| for (rows = height*fontheight(p); rows--;) { |
| fb_memmove(dest, src, width); |
| src -= p->next_line; |
| dest -= p->next_line; |
| } |
| } |
| } |
| |
| void fbcon_mfb_clear(struct vc_data *conp, struct display *p, int sy, int sx, |
| int height, int width) |
| { |
| u8 *dest; |
| u_int rows; |
| int inverse = conp ? attr_reverse(p,conp->vc_video_erase_char) : 0; |
| |
| dest = p->screen_base+sy*fontheight(p)*p->next_line+sx; |
| |
| if (sx == 0 && width == p->next_line) { |
| if (inverse) |
| fb_memset255(dest, height*fontheight(p)*width); |
| else |
| fb_memclear(dest, height*fontheight(p)*width); |
| } else |
| for (rows = height*fontheight(p); rows--; dest += p->next_line) |
| if (inverse) |
| fb_memset255(dest, width); |
| else |
| fb_memclear_small(dest, width); |
| } |
| |
| void fbcon_mfb_putc(struct vc_data *conp, struct display *p, int c, int yy, |
| int xx) |
| { |
| u8 *dest, *cdat; |
| u_int rows, bold, revs, underl; |
| u8 d; |
| |
| dest = p->screen_base+yy*fontheight(p)*p->next_line+xx; |
| cdat = p->fontdata+(c&p->charmask)*fontheight(p); |
| bold = attr_bold(p,c); |
| revs = attr_reverse(p,c); |
| underl = attr_underline(p,c); |
| |
| for (rows = fontheight(p); rows--; dest += p->next_line) { |
| d = *cdat++; |
| if (underl && !rows) |
| d = 0xff; |
| else if (bold) |
| d |= d>>1; |
| if (revs) |
| d = ~d; |
| fb_writeb (d, dest); |
| } |
| } |
| |
| void fbcon_mfb_putcs(struct vc_data *conp, struct display *p, |
| const unsigned short *s, int count, int yy, int xx) |
| { |
| u8 *dest, *dest0, *cdat; |
| u_int rows, bold, revs, underl; |
| u8 d; |
| u16 c; |
| |
| dest0 = p->screen_base+yy*fontheight(p)*p->next_line+xx; |
| c = scr_readw(s); |
| bold = attr_bold(p, c); |
| revs = attr_reverse(p, c); |
| underl = attr_underline(p, c); |
| |
| while (count--) { |
| c = scr_readw(s++) & p->charmask; |
| dest = dest0++; |
| cdat = p->fontdata+c*fontheight(p); |
| for (rows = fontheight(p); rows--; dest += p->next_line) { |
| d = *cdat++; |
| if (underl && !rows) |
| d = 0xff; |
| else if (bold) |
| d |= d>>1; |
| if (revs) |
| d = ~d; |
| fb_writeb (d, dest); |
| } |
| } |
| } |
| |
| void fbcon_mfb_revc(struct display *p, int xx, int yy) |
| { |
| u8 *dest, d; |
| u_int rows; |
| |
| dest = p->screen_base+yy*fontheight(p)*p->next_line+xx; |
| for (rows = fontheight(p); rows--; dest += p->next_line) { |
| d = fb_readb(dest); |
| fb_writeb (~d, dest); |
| } |
| } |
| |
| void fbcon_mfb_clear_margins(struct vc_data *conp, struct display *p, |
| int bottom_only) |
| { |
| u8 *dest; |
| int height, bottom; |
| int inverse = conp ? attr_reverse(p,conp->vc_video_erase_char) : 0; |
| |
| /* XXX Need to handle right margin? */ |
| |
| height = p->var.yres - conp->vc_rows * fontheight(p); |
| if (!height) |
| return; |
| bottom = conp->vc_rows + p->yscroll; |
| if (bottom >= p->vrows) |
| bottom -= p->vrows; |
| dest = p->screen_base + bottom * fontheight(p) * p->next_line; |
| if (inverse) |
| fb_memset255(dest, height * p->next_line); |
| else |
| fb_memclear(dest, height * p->next_line); |
| } |
| |
| |
| /* |
| * `switch' for the low level operations |
| */ |
| |
| struct display_switch fbcon_mfb = { |
| setup: fbcon_mfb_setup, |
| bmove: fbcon_mfb_bmove, |
| clear: fbcon_mfb_clear, |
| putc: fbcon_mfb_putc, |
| putcs: fbcon_mfb_putcs, |
| revc: fbcon_mfb_revc, |
| clear_margins: fbcon_mfb_clear_margins, |
| fontwidthmask: FONTWIDTH(8) |
| }; |
| |
| |
| #ifdef MODULE |
| MODULE_LICENSE("GPL"); |
| |
| int init_module(void) |
| { |
| return 0; |
| } |
| |
| void cleanup_module(void) |
| {} |
| #endif /* MODULE */ |
| |
| |
| /* |
| * Visible symbols for modules |
| */ |
| |
| EXPORT_SYMBOL(fbcon_mfb); |
| EXPORT_SYMBOL(fbcon_mfb_setup); |
| EXPORT_SYMBOL(fbcon_mfb_bmove); |
| EXPORT_SYMBOL(fbcon_mfb_clear); |
| EXPORT_SYMBOL(fbcon_mfb_putc); |
| EXPORT_SYMBOL(fbcon_mfb_putcs); |
| EXPORT_SYMBOL(fbcon_mfb_revc); |
| EXPORT_SYMBOL(fbcon_mfb_clear_margins); |