Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
14 | #include <linux/types.h> |
15 | #include <linux/vt_buffer.h> | |
16 | #include <linux/vt_kern.h> | |
17 | ||
18 | #include <asm/io.h> | |
19 | ||
88fb2c6e AD |
20 | #define FBCON_FLAGS_INIT 1 |
21 | #define FBCON_FLAGS_CURSOR_TIMER 2 | |
1da177e4 LT |
22 | |
23 | /* | |
24 | * This is the interface between the low-level console driver and the | |
25 | * low-level frame buffer device | |
26 | */ | |
27 | ||
28 | struct display { | |
1da177e4 | 29 | /* Filled in by the low-level console driver */ |
2f4516db | 30 | const u_char *fontdata; |
1da177e4 LT |
31 | int userfont; /* != 0 if fontdata kmalloc()ed */ |
32 | u_short scrollmode; /* Scroll Method */ | |
e4fc2761 | 33 | u_short inverse; /* != 0 text black on white as default */ |
1da177e4 LT |
34 | short yscroll; /* Hardware scrolling */ |
35 | int vrows; /* number of virtual rows */ | |
36 | int cursor_shape; | |
e4fc2761 | 37 | int con_rotate; |
1da177e4 LT |
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; | |
9791d763 | 51 | const struct fb_videomode *mode; |
1da177e4 LT |
52 | }; |
53 | ||
54 | struct 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); | |
b73deed3 AD |
64 | void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode, |
65 | int softback_lines, int fg, int bg); | |
e4fc2761 | 66 | int (*update_start)(struct fb_info *info); |
b73deed3 | 67 | int (*rotate_font)(struct fb_info *info, struct vc_data *vc); |
e4fc2761 | 68 | struct fb_var_screeninfo var; /* copy of the current fb_var_screeninfo */ |
1da177e4 LT |
69 | struct timer_list cursor_timer; /* Cursor timer */ |
70 | struct fb_cursor cursor_state; | |
ab767201 | 71 | struct display *p; |
1da177e4 LT |
72 | int currcon; /* Current VC. */ |
73 | int cursor_flash; | |
74 | int cursor_reset; | |
75 | int blank_state; | |
76 | int graphics; | |
77 | int flags; | |
e4fc2761 AD |
78 | int rotate; |
79 | int cur_rotate; | |
1da177e4 | 80 | char *cursor_data; |
e4fc2761 AD |
81 | u8 *fontbuffer; |
82 | u8 *fontdata; | |
e299dd4d DJ |
83 | u8 *cursor_src; |
84 | u32 cursor_size; | |
e4fc2761 | 85 | u32 fd_size; |
1da177e4 LT |
86 | }; |
87 | /* | |
88 | * Attribute Decoding | |
89 | */ | |
90 | ||
91 | /* Color */ | |
92 | #define attr_fgcol(fgshift,s) \ | |
93 | (((s) >> (fgshift)) & 0x0f) | |
94 | #define attr_bgcol(bgshift,s) \ | |
3838f59f | 95 | (((s) >> (bgshift)) & 0x0f) |
1da177e4 LT |
96 | |
97 | /* Monochrome */ | |
98 | #define attr_bold(s) \ | |
99 | ((s) & 0x200) | |
100 | #define attr_reverse(s) \ | |
101 | ((s) & 0x800) | |
102 | #define attr_underline(s) \ | |
103 | ((s) & 0x400) | |
104 | #define attr_blink(s) \ | |
105 | ((s) & 0x8000) | |
106 | ||
22af89aa HH |
107 | |
108 | static inline int mono_col(const struct fb_info *info) | |
109 | { | |
110 | __u32 max_len; | |
111 | max_len = max(info->var.green.length, info->var.red.length); | |
112 | max_len = max(info->var.blue.length, max_len); | |
08650869 | 113 | return (~(0xfff << max_len)) & 0xff; |
22af89aa | 114 | } |
91c43132 TP |
115 | |
116 | static inline int attr_col_ec(int shift, struct vc_data *vc, | |
117 | struct fb_info *info, int is_fg) | |
118 | { | |
119 | int is_mono01; | |
120 | int col; | |
121 | int fg; | |
122 | int bg; | |
123 | ||
124 | if (!vc) | |
125 | return 0; | |
126 | ||
127 | if (vc->vc_can_do_color) | |
128 | return is_fg ? attr_fgcol(shift,vc->vc_video_erase_char) | |
129 | : attr_bgcol(shift,vc->vc_video_erase_char); | |
130 | ||
131 | if (!info) | |
132 | return 0; | |
133 | ||
134 | col = mono_col(info); | |
135 | is_mono01 = info->fix.visual == FB_VISUAL_MONO01; | |
136 | ||
137 | if (attr_reverse(vc->vc_video_erase_char)) { | |
138 | fg = is_mono01 ? col : 0; | |
139 | bg = is_mono01 ? 0 : col; | |
140 | } | |
141 | else { | |
142 | fg = is_mono01 ? 0 : col; | |
143 | bg = is_mono01 ? col : 0; | |
144 | } | |
145 | ||
146 | return is_fg ? fg : bg; | |
147 | } | |
148 | ||
cba603bf JB |
149 | #define attr_bgcol_ec(bgshift, vc, info) attr_col_ec(bgshift, vc, info, 0) |
150 | #define attr_fgcol_ec(fgshift, vc, info) attr_col_ec(fgshift, vc, info, 1) | |
91c43132 | 151 | |
1da177e4 LT |
152 | /* Font */ |
153 | #define REFCOUNT(fd) (((int *)(fd))[-1]) | |
154 | #define FNTSIZE(fd) (((int *)(fd))[-2]) | |
155 | #define FNTCHARCNT(fd) (((int *)(fd))[-3]) | |
156 | #define FNTSUM(fd) (((int *)(fd))[-4]) | |
157 | #define FONT_EXTRA_WORDS 4 | |
158 | ||
159 | /* | |
160 | * Scroll Method | |
161 | */ | |
162 | ||
163 | /* There are several methods fbcon can use to move text around the screen: | |
164 | * | |
165 | * Operation Pan Wrap | |
166 | *--------------------------------------------- | |
167 | * SCROLL_MOVE copyarea No No | |
168 | * SCROLL_PAN_MOVE copyarea Yes No | |
169 | * SCROLL_WRAP_MOVE copyarea No Yes | |
170 | * SCROLL_REDRAW imageblit No No | |
171 | * SCROLL_PAN_REDRAW imageblit Yes No | |
172 | * SCROLL_WRAP_REDRAW imageblit No Yes | |
173 | * | |
174 | * (SCROLL_WRAP_REDRAW is not implemented yet) | |
175 | * | |
176 | * In general, fbcon will choose the best scrolling | |
177 | * method based on the rule below: | |
178 | * | |
179 | * Pan/Wrap > accel imageblit > accel copyarea > | |
180 | * soft imageblit > (soft copyarea) | |
181 | * | |
182 | * Exception to the rule: Pan + accel copyarea is | |
183 | * preferred over Pan + accel imageblit. | |
184 | * | |
185 | * The above is typical for PCI/AGP cards. Unless | |
186 | * overridden, fbcon will never use soft copyarea. | |
187 | * | |
188 | * If you need to override the above rule, set the | |
189 | * appropriate flags in fb_info->flags. For example, | |
190 | * to prefer copyarea over imageblit, set | |
191 | * FBINFO_READS_FAST. | |
192 | * | |
193 | * Other notes: | |
194 | * + use the hardware engine to move the text | |
195 | * (hw-accelerated copyarea() and fillrect()) | |
196 | * + use hardware-supported panning on a large virtual screen | |
197 | * + amifb can not only pan, but also wrap the display by N lines | |
198 | * (i.e. visible line i = physical line (i+N) % yres). | |
199 | * + read what's already rendered on the screen and | |
200 | * write it in a different place (this is cfb_copyarea()) | |
201 | * + re-render the text to the screen | |
202 | * | |
203 | * Whether to use wrapping or panning can only be figured out at | |
204 | * runtime (when we know whether our font height is a multiple | |
205 | * of the pan/wrap step) | |
206 | * | |
207 | */ | |
208 | ||
209 | #define SCROLL_MOVE 0x001 | |
210 | #define SCROLL_PAN_MOVE 0x002 | |
211 | #define SCROLL_WRAP_MOVE 0x003 | |
212 | #define SCROLL_REDRAW 0x004 | |
213 | #define SCROLL_PAN_REDRAW 0x005 | |
214 | ||
215 | #ifdef CONFIG_FB_TILEBLITTING | |
b73deed3 | 216 | extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info); |
1da177e4 LT |
217 | #endif |
218 | extern void fbcon_set_bitops(struct fbcon_ops *ops); | |
c465e05a | 219 | extern int soft_cursor(struct fb_info *info, struct fb_cursor *cursor); |
e4fc2761 AD |
220 | |
221 | #define FBCON_ATTRIBUTE_UNDERLINE 1 | |
222 | #define FBCON_ATTRIBUTE_REVERSE 2 | |
223 | #define FBCON_ATTRIBUTE_BOLD 4 | |
224 | ||
225 | static inline int real_y(struct display *p, int ypos) | |
226 | { | |
227 | int rows = p->vrows; | |
228 | ||
229 | ypos += p->yscroll; | |
230 | return ypos < rows ? ypos : ypos - rows; | |
231 | } | |
232 | ||
233 | ||
234 | static inline int get_attribute(struct fb_info *info, u16 c) | |
235 | { | |
236 | int attribute = 0; | |
237 | ||
238 | if (fb_get_color_depth(&info->var, &info->fix) == 1) { | |
239 | if (attr_underline(c)) | |
240 | attribute |= FBCON_ATTRIBUTE_UNDERLINE; | |
241 | if (attr_reverse(c)) | |
242 | attribute |= FBCON_ATTRIBUTE_REVERSE; | |
243 | if (attr_bold(c)) | |
244 | attribute |= FBCON_ATTRIBUTE_BOLD; | |
245 | } | |
246 | ||
247 | return attribute; | |
248 | } | |
249 | ||
250 | #define FBCON_SWAP(i,r,v) ({ \ | |
251 | typeof(r) _r = (r); \ | |
252 | typeof(v) _v = (v); \ | |
253 | (void) (&_r == &_v); \ | |
254 | (i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; }) | |
255 | ||
6cc50e1c AD |
256 | #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION |
257 | extern void fbcon_set_rotate(struct fbcon_ops *ops); | |
258 | #else | |
e4fc2761 | 259 | #define fbcon_set_rotate(x) do {} while(0) |
6cc50e1c | 260 | #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ |
e4fc2761 | 261 | |
1da177e4 | 262 | #endif /* _VIDEO_FBCON_H */ |
e4fc2761 | 263 |