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1/*2 * linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver3 *4 * Copyright (C) 1997 Geert Uytterhoeven5 *6 * This file is subject to the terms and conditions of the GNU General Public7 * License. See the file COPYING in the main directory of this archive8 * for more details.9 */10 11#ifndef _VIDEO_FBCON_H12#define _VIDEO_FBCON_H13 14#include <linux/types.h>15#include <linux/vt_buffer.h>16#include <linux/vt_kern.h>17#include <linux/workqueue.h>18 19#include <asm/io.h>20 21 /*22 * This is the interface between the low-level console driver and the23 * low-level frame buffer device24 */25 26struct fbcon_display {27 /* Filled in by the low-level console driver */28 const u_char *fontdata;29 int userfont; /* != 0 if fontdata kmalloc()ed */30#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION31 u_short scrollmode; /* Scroll Method, use fb_scrollmode() */32#endif33 u_short inverse; /* != 0 text black on white as default */34 short yscroll; /* Hardware scrolling */35 int vrows; /* number of virtual rows */36 int cursor_shape;37 int con_rotate;38 u32 xres_virtual;39 u32 yres_virtual;40 u32 height;41 u32 width;42 u32 bits_per_pixel;43 u32 grayscale;44 u32 nonstd;45 u32 accel_flags;46 u32 rotate;47 struct fb_bitfield red;48 struct fb_bitfield green;49 struct fb_bitfield blue;50 struct fb_bitfield transp;51 const struct fb_videomode *mode;52};53 54struct fbcon_ops {55 void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,56 int sx, int dy, int dx, int height, int width);57 void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,58 int sx, int height, int width);59 void (*putcs)(struct vc_data *vc, struct fb_info *info,60 const unsigned short *s, int count, int yy, int xx,61 int fg, int bg);62 void (*clear_margins)(struct vc_data *vc, struct fb_info *info,63 int color, int bottom_only);64 void (*cursor)(struct vc_data *vc, struct fb_info *info,65 bool enable, int fg, int bg);66 int (*update_start)(struct fb_info *info);67 int (*rotate_font)(struct fb_info *info, struct vc_data *vc);68 struct fb_var_screeninfo var; /* copy of the current fb_var_screeninfo */69 struct delayed_work cursor_work; /* Cursor timer */70 struct fb_cursor cursor_state;71 struct fbcon_display *p;72 struct fb_info *info;73 int currcon; /* Current VC. */74 int cur_blink_jiffies;75 int cursor_flash;76 int cursor_reset;77 int blank_state;78 int graphics;79 int save_graphics; /* for debug enter/leave */80 bool initialized;81 int rotate;82 int cur_rotate;83 char *cursor_data;84 u8 *fontbuffer;85 u8 *fontdata;86 u8 *cursor_src;87 u32 cursor_size;88 u32 fd_size;89};90 /*91 * Attribute Decoding92 */93 94/* Color */95#define attr_fgcol(fgshift,s) \96 (((s) >> (fgshift)) & 0x0f)97#define attr_bgcol(bgshift,s) \98 (((s) >> (bgshift)) & 0x0f)99 100/* Monochrome */101#define attr_bold(s) \102 ((s) & 0x200)103#define attr_reverse(s) \104 ((s) & 0x800)105#define attr_underline(s) \106 ((s) & 0x400)107#define attr_blink(s) \108 ((s) & 0x8000)109 110 111static inline int mono_col(const struct fb_info *info)112{113 __u32 max_len;114 max_len = max(info->var.green.length, info->var.red.length);115 max_len = max(info->var.blue.length, max_len);116 return (~(0xfff << max_len)) & 0xff;117}118 119static inline int attr_col_ec(int shift, struct vc_data *vc,120 struct fb_info *info, int is_fg)121{122 int is_mono01;123 int col;124 int fg;125 int bg;126 127 if (!vc)128 return 0;129 130 if (vc->vc_can_do_color)131 return is_fg ? attr_fgcol(shift,vc->vc_video_erase_char)132 : attr_bgcol(shift,vc->vc_video_erase_char);133 134 if (!info)135 return 0;136 137 col = mono_col(info);138 is_mono01 = info->fix.visual == FB_VISUAL_MONO01;139 140 if (attr_reverse(vc->vc_video_erase_char)) {141 fg = is_mono01 ? col : 0;142 bg = is_mono01 ? 0 : col;143 }144 else {145 fg = is_mono01 ? 0 : col;146 bg = is_mono01 ? col : 0;147 }148 149 return is_fg ? fg : bg;150}151 152#define attr_bgcol_ec(bgshift, vc, info) attr_col_ec(bgshift, vc, info, 0)153#define attr_fgcol_ec(fgshift, vc, info) attr_col_ec(fgshift, vc, info, 1)154 155 /*156 * Scroll Method157 */158 159/* There are several methods fbcon can use to move text around the screen:160 *161 * Operation Pan Wrap162 *---------------------------------------------163 * SCROLL_MOVE copyarea No No164 * SCROLL_PAN_MOVE copyarea Yes No165 * SCROLL_WRAP_MOVE copyarea No Yes166 * SCROLL_REDRAW imageblit No No167 * SCROLL_PAN_REDRAW imageblit Yes No168 * SCROLL_WRAP_REDRAW imageblit No Yes169 *170 * (SCROLL_WRAP_REDRAW is not implemented yet)171 *172 * In general, fbcon will choose the best scrolling173 * method based on the rule below:174 *175 * Pan/Wrap > accel imageblit > accel copyarea >176 * soft imageblit > (soft copyarea)177 *178 * Exception to the rule: Pan + accel copyarea is179 * preferred over Pan + accel imageblit.180 *181 * The above is typical for PCI/AGP cards. Unless182 * overridden, fbcon will never use soft copyarea.183 *184 * If you need to override the above rule, set the185 * appropriate flags in fb_info->flags. For example,186 * to prefer copyarea over imageblit, set187 * FBINFO_READS_FAST.188 *189 * Other notes:190 * + use the hardware engine to move the text191 * (hw-accelerated copyarea() and fillrect())192 * + use hardware-supported panning on a large virtual screen193 * + amifb can not only pan, but also wrap the display by N lines194 * (i.e. visible line i = physical line (i+N) % yres).195 * + read what's already rendered on the screen and196 * write it in a different place (this is cfb_copyarea())197 * + re-render the text to the screen198 *199 * Whether to use wrapping or panning can only be figured out at200 * runtime (when we know whether our font height is a multiple201 * of the pan/wrap step)202 *203 */204 205#define SCROLL_MOVE 0x001206#define SCROLL_PAN_MOVE 0x002207#define SCROLL_WRAP_MOVE 0x003208#define SCROLL_REDRAW 0x004209#define SCROLL_PAN_REDRAW 0x005210 211static inline u_short fb_scrollmode(struct fbcon_display *fb)212{213#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION214 return fb->scrollmode;215#else216 /* hardcoded to SCROLL_REDRAW if acceleration was disabled. */217 return SCROLL_REDRAW;218#endif219}220 221 222#ifdef CONFIG_FB_TILEBLITTING223extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);224#endif225extern void fbcon_set_bitops(struct fbcon_ops *ops);226extern int soft_cursor(struct fb_info *info, struct fb_cursor *cursor);227 228#define FBCON_ATTRIBUTE_UNDERLINE 1229#define FBCON_ATTRIBUTE_REVERSE 2230#define FBCON_ATTRIBUTE_BOLD 4231 232static inline int real_y(struct fbcon_display *p, int ypos)233{234 int rows = p->vrows;235 236 ypos += p->yscroll;237 return ypos < rows ? ypos : ypos - rows;238}239 240 241static inline int get_attribute(struct fb_info *info, u16 c)242{243 int attribute = 0;244 245 if (fb_get_color_depth(&info->var, &info->fix) == 1) {246 if (attr_underline(c))247 attribute |= FBCON_ATTRIBUTE_UNDERLINE;248 if (attr_reverse(c))249 attribute |= FBCON_ATTRIBUTE_REVERSE;250 if (attr_bold(c))251 attribute |= FBCON_ATTRIBUTE_BOLD;252 }253 254 return attribute;255}256 257#define FBCON_SWAP(i,r,v) ({ \258 typeof(r) _r = (r); \259 typeof(v) _v = (v); \260 (void) (&_r == &_v); \261 (i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; })262 263#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION264extern void fbcon_set_rotate(struct fbcon_ops *ops);265#else266#define fbcon_set_rotate(x) do {} while(0)267#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */268 269#endif /* _VIDEO_FBCON_H */270