1/* 2 * linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1997 Geert Uytterhoeven 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive 8 * for more details. 9 */ 10 11#ifndef _VIDEO_FBCON_H 12#define _VIDEO_FBCON_H 13 14#include <linux/types.h> 15#include <linux/vt_buffer.h> 16#include <linux/vt_kern.h> 17 18#include <asm/io.h> 19 20#define FBCON_FLAGS_INIT 1 21#define FBCON_FLAGS_CURSOR_TIMER 2 22 23 /* 24 * This is the interface between the low-level console driver and the 25 * low-level frame buffer device 26 */ 27 28struct display { 29 /* Filled in by the low-level console driver */ 30 const u_char *fontdata; 31 int userfont; /* != 0 if fontdata kmalloc()ed */ 32 u_short scrollmode; /* Scroll Method */ 33 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 bottom_only); 64 void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode, 65 int softback_lines, 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 timer_list cursor_timer; /* Cursor timer */ 70 struct fb_cursor cursor_state; 71 struct display *p; 72 int currcon; /* Current VC. */ 73 int cursor_flash; 74 int cursor_reset; 75 int blank_state; 76 int graphics; 77 int save_graphics; /* for debug enter/leave */ 78 int flags; 79 int rotate; 80 int cur_rotate; 81 char *cursor_data; 82 u8 *fontbuffer; 83 u8 *fontdata; 84 u8 *cursor_src; 85 u32 cursor_size; 86 u32 fd_size; 87}; 88 /* 89 * Attribute Decoding 90 */ 91 92/* Color */ 93#define attr_fgcol(fgshift,s) \ 94 (((s) >> (fgshift)) & 0x0f) 95#define attr_bgcol(bgshift,s) \ 96 (((s) >> (bgshift)) & 0x0f) 97 98/* Monochrome */ 99#define attr_bold(s) \ 100 ((s) & 0x200) 101#define attr_reverse(s) \ 102 ((s) & 0x800) 103#define attr_underline(s) \ 104 ((s) & 0x400) 105#define attr_blink(s) \ 106 ((s) & 0x8000) 107 108 109static inline int mono_col(const struct fb_info *info) 110{ 111 __u32 max_len; 112 max_len = max(info->var.green.length, info->var.red.length); 113 max_len = max(info->var.blue.length, max_len); 114 return (~(0xfff << max_len)) & 0xff; 115} 116 117static inline int attr_col_ec(int shift, struct vc_data *vc, 118 struct fb_info *info, int is_fg) 119{ 120 int is_mono01; 121 int col; 122 int fg; 123 int bg; 124 125 if (!vc) 126 return 0; 127 128 if (vc->vc_can_do_color) 129 return is_fg ? attr_fgcol(shift,vc->vc_video_erase_char) 130 : attr_bgcol(shift,vc->vc_video_erase_char); 131 132 if (!info) 133 return 0; 134 135 col = mono_col(info); 136 is_mono01 = info->fix.visual == FB_VISUAL_MONO01; 137 138 if (attr_reverse(vc->vc_video_erase_char)) { 139 fg = is_mono01 ? col : 0; 140 bg = is_mono01 ? 0 : col; 141 } 142 else { 143 fg = is_mono01 ? 0 : col; 144 bg = is_mono01 ? col : 0; 145 } 146 147 return is_fg ? fg : bg; 148} 149 150#define attr_bgcol_ec(bgshift, vc, info) attr_col_ec(bgshift, vc, info, 0) 151#define attr_fgcol_ec(fgshift, vc, info) attr_col_ec(fgshift, vc, info, 1) 152 153/* Font */ 154#define REFCOUNT(fd) (((int *)(fd))[-1]) 155#define FNTSIZE(fd) (((int *)(fd))[-2]) 156#define FNTCHARCNT(fd) (((int *)(fd))[-3]) 157#define FNTSUM(fd) (((int *)(fd))[-4]) 158#define FONT_EXTRA_WORDS 4 159 160 /* 161 * Scroll Method 162 */ 163 164/* There are several methods fbcon can use to move text around the screen: 165 * 166 * Operation Pan Wrap 167 *--------------------------------------------- 168 * SCROLL_MOVE copyarea No No 169 * SCROLL_PAN_MOVE copyarea Yes No 170 * SCROLL_WRAP_MOVE copyarea No Yes 171 * SCROLL_REDRAW imageblit No No 172 * SCROLL_PAN_REDRAW imageblit Yes No 173 * SCROLL_WRAP_REDRAW imageblit No Yes 174 * 175 * (SCROLL_WRAP_REDRAW is not implemented yet) 176 * 177 * In general, fbcon will choose the best scrolling 178 * method based on the rule below: 179 * 180 * Pan/Wrap > accel imageblit > accel copyarea > 181 * soft imageblit > (soft copyarea) 182 * 183 * Exception to the rule: Pan + accel copyarea is 184 * preferred over Pan + accel imageblit. 185 * 186 * The above is typical for PCI/AGP cards. Unless 187 * overridden, fbcon will never use soft copyarea. 188 * 189 * If you need to override the above rule, set the 190 * appropriate flags in fb_info->flags. For example, 191 * to prefer copyarea over imageblit, set 192 * FBINFO_READS_FAST. 193 * 194 * Other notes: 195 * + use the hardware engine to move the text 196 * (hw-accelerated copyarea() and fillrect()) 197 * + use hardware-supported panning on a large virtual screen 198 * + amifb can not only pan, but also wrap the display by N lines 199 * (i.e. visible line i = physical line (i+N) % yres). 200 * + read what's already rendered on the screen and 201 * write it in a different place (this is cfb_copyarea()) 202 * + re-render the text to the screen 203 * 204 * Whether to use wrapping or panning can only be figured out at 205 * runtime (when we know whether our font height is a multiple 206 * of the pan/wrap step) 207 * 208 */ 209 210#define SCROLL_MOVE 0x001 211#define SCROLL_PAN_MOVE 0x002 212#define SCROLL_WRAP_MOVE 0x003 213#define SCROLL_REDRAW 0x004 214#define SCROLL_PAN_REDRAW 0x005 215 216#ifdef CONFIG_FB_TILEBLITTING 217extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info); 218#endif 219extern void fbcon_set_bitops(struct fbcon_ops *ops); 220extern int soft_cursor(struct fb_info *info, struct fb_cursor *cursor); 221 222#define FBCON_ATTRIBUTE_UNDERLINE 1 223#define FBCON_ATTRIBUTE_REVERSE 2 224#define FBCON_ATTRIBUTE_BOLD 4 225 226static inline int real_y(struct display *p, int ypos) 227{ 228 int rows = p->vrows; 229 230 ypos += p->yscroll; 231 return ypos < rows ? ypos : ypos - rows; 232} 233 234 235static inline int get_attribute(struct fb_info *info, u16 c) 236{ 237 int attribute = 0; 238 239 if (fb_get_color_depth(&info->var, &info->fix) == 1) { 240 if (attr_underline(c)) 241 attribute |= FBCON_ATTRIBUTE_UNDERLINE; 242 if (attr_reverse(c)) 243 attribute |= FBCON_ATTRIBUTE_REVERSE; 244 if (attr_bold(c)) 245 attribute |= FBCON_ATTRIBUTE_BOLD; 246 } 247 248 return attribute; 249} 250 251#define FBCON_SWAP(i,r,v) ({ \ 252 typeof(r) _r = (r); \ 253 typeof(v) _v = (v); \ 254 (void) (&_r == &_v); \ 255 (i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; }) 256 257#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 258extern void fbcon_set_rotate(struct fbcon_ops *ops); 259#else 260#define fbcon_set_rotate(x) do {} while(0) 261#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 262 263#endif /* _VIDEO_FBCON_H */ 264