diff options
Diffstat (limited to 'drivers/video/console/fbcon.h')
| -rw-r--r-- | drivers/video/console/fbcon.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h new file mode 100644 index 000000000000..5d377860bce2 --- /dev/null +++ b/drivers/video/console/fbcon.h @@ -0,0 +1,170 @@ +/* + * linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver + * + * Copyright (C) 1997 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. + */ + +#ifndef _VIDEO_FBCON_H +#define _VIDEO_FBCON_H + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/vt_buffer.h> +#include <linux/vt_kern.h> + +#include <asm/io.h> + +#define FBCON_FLAGS_INIT 1 + + /* + * This is the interface between the low-level console driver and the + * low-level frame buffer device + */ + +struct display { + /* Filled in by the frame buffer device */ + u_short inverse; /* != 0 text black on white as default */ + /* Filled in by the low-level console driver */ + u_char *fontdata; + int userfont; /* != 0 if fontdata kmalloc()ed */ + u_short scrollmode; /* Scroll Method */ + short yscroll; /* Hardware scrolling */ + int vrows; /* number of virtual rows */ + int cursor_shape; + u32 xres_virtual; + u32 yres_virtual; + u32 height; + u32 width; + u32 bits_per_pixel; + u32 grayscale; + u32 nonstd; + u32 accel_flags; + u32 rotate; + struct fb_bitfield red; + struct fb_bitfield green; + struct fb_bitfield blue; + struct fb_bitfield transp; + struct fb_videomode *mode; +}; + +struct fbcon_ops { + void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy, + int sx, int dy, int dx, int height, int width); + void (*clear)(struct vc_data *vc, struct fb_info *info, int sy, + int sx, int height, int width); + void (*putcs)(struct vc_data *vc, struct fb_info *info, + const unsigned short *s, int count, int yy, int xx, + int fg, int bg); + void (*clear_margins)(struct vc_data *vc, struct fb_info *info, + int bottom_only); + void (*cursor)(struct vc_data *vc, struct fb_info *info, + struct display *p, int mode, int softback_lines, int fg, int bg); + + struct timer_list cursor_timer; /* Cursor timer */ + struct fb_cursor cursor_state; + int currcon; /* Current VC. */ + int cursor_flash; + int cursor_reset; + int blank_state; + int graphics; + int flags; + char *cursor_data; +}; + /* + * Attribute Decoding + */ + +/* Color */ +#define attr_fgcol(fgshift,s) \ + (((s) >> (fgshift)) & 0x0f) +#define attr_bgcol(bgshift,s) \ + (((s) >> (bgshift)) & 0x0f) +#define attr_bgcol_ec(bgshift,vc) \ + ((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0) +#define attr_fgcol_ec(fgshift,vc) \ + ((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0) + +/* Monochrome */ +#define attr_bold(s) \ + ((s) & 0x200) +#define attr_reverse(s) \ + ((s) & 0x800) +#define attr_underline(s) \ + ((s) & 0x400) +#define attr_blink(s) \ + ((s) & 0x8000) + +/* Font */ +#define REFCOUNT(fd) (((int *)(fd))[-1]) +#define FNTSIZE(fd) (((int *)(fd))[-2]) +#define FNTCHARCNT(fd) (((int *)(fd))[-3]) +#define FNTSUM(fd) (((int *)(fd))[-4]) +#define FONT_EXTRA_WORDS 4 + + /* + * Scroll Method + */ + +/* There are several methods fbcon can use to move text around the screen: + * + * Operation Pan Wrap + *--------------------------------------------- + * SCROLL_MOVE copyarea No No + * SCROLL_PAN_MOVE copyarea Yes No + * SCROLL_WRAP_MOVE copyarea No Yes + * SCROLL_REDRAW imageblit No No + * SCROLL_PAN_REDRAW imageblit Yes No + * SCROLL_WRAP_REDRAW imageblit No Yes + * + * (SCROLL_WRAP_REDRAW is not implemented yet) + * + * In general, fbcon will choose the best scrolling + * method based on the rule below: + * + * Pan/Wrap > accel imageblit > accel copyarea > + * soft imageblit > (soft copyarea) + * + * Exception to the rule: Pan + accel copyarea is + * preferred over Pan + accel imageblit. + * + * The above is typical for PCI/AGP cards. Unless + * overridden, fbcon will never use soft copyarea. + * + * If you need to override the above rule, set the + * appropriate flags in fb_info->flags. For example, + * to prefer copyarea over imageblit, set + * FBINFO_READS_FAST. + * + * Other notes: + * + use the hardware engine to move the text + * (hw-accelerated copyarea() and fillrect()) + * + use hardware-supported panning on a large virtual screen + * + amifb can not only pan, but also wrap the display by N lines + * (i.e. visible line i = physical line (i+N) % yres). + * + read what's already rendered on the screen and + * write it in a different place (this is cfb_copyarea()) + * + re-render the text to the screen + * + * Whether to use wrapping or panning can only be figured out at + * runtime (when we know whether our font height is a multiple + * of the pan/wrap step) + * + */ + +#define SCROLL_MOVE 0x001 +#define SCROLL_PAN_MOVE 0x002 +#define SCROLL_WRAP_MOVE 0x003 +#define SCROLL_REDRAW 0x004 +#define SCROLL_PAN_REDRAW 0x005 + +#ifdef CONFIG_FB_TILEBLITTING +extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info, + struct display *p, struct fbcon_ops *ops); +#endif +extern void fbcon_set_bitops(struct fbcon_ops *ops); + +#endif /* _VIDEO_FBCON_H */ |