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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 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/vt_buffer.h> | |
17 | #include <linux/vt_kern.h> | |
18 | ||
19 | #include <asm/io.h> | |
20 | ||
88fb2c6e AD |
21 | #define FBCON_FLAGS_INIT 1 |
22 | #define FBCON_FLAGS_CURSOR_TIMER 2 | |
1da177e4 LT |
23 | |
24 | /* | |
25 | * This is the interface between the low-level console driver and the | |
26 | * low-level frame buffer device | |
27 | */ | |
28 | ||
29 | struct display { | |
30 | /* Filled in by the frame buffer device */ | |
31 | u_short inverse; /* != 0 text black on white as default */ | |
32 | /* Filled in by the low-level console driver */ | |
33 | u_char *fontdata; | |
34 | int userfont; /* != 0 if fontdata kmalloc()ed */ | |
35 | u_short scrollmode; /* Scroll Method */ | |
36 | short yscroll; /* Hardware scrolling */ | |
37 | int vrows; /* number of virtual rows */ | |
38 | int cursor_shape; | |
39 | u32 xres_virtual; | |
40 | u32 yres_virtual; | |
41 | u32 height; | |
42 | u32 width; | |
43 | u32 bits_per_pixel; | |
44 | u32 grayscale; | |
45 | u32 nonstd; | |
46 | u32 accel_flags; | |
47 | u32 rotate; | |
48 | struct fb_bitfield red; | |
49 | struct fb_bitfield green; | |
50 | struct fb_bitfield blue; | |
51 | struct fb_bitfield transp; | |
52 | struct fb_videomode *mode; | |
53 | }; | |
54 | ||
55 | struct fbcon_ops { | |
56 | void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy, | |
57 | int sx, int dy, int dx, int height, int width); | |
58 | void (*clear)(struct vc_data *vc, struct fb_info *info, int sy, | |
59 | int sx, int height, int width); | |
60 | void (*putcs)(struct vc_data *vc, struct fb_info *info, | |
61 | const unsigned short *s, int count, int yy, int xx, | |
62 | int fg, int bg); | |
63 | void (*clear_margins)(struct vc_data *vc, struct fb_info *info, | |
64 | int bottom_only); | |
65 | void (*cursor)(struct vc_data *vc, struct fb_info *info, | |
66 | struct display *p, int mode, int softback_lines, int fg, int bg); | |
67 | ||
68 | struct timer_list cursor_timer; /* Cursor timer */ | |
69 | struct fb_cursor cursor_state; | |
70 | int currcon; /* Current VC. */ | |
71 | int cursor_flash; | |
72 | int cursor_reset; | |
73 | int blank_state; | |
74 | int graphics; | |
75 | int flags; | |
76 | char *cursor_data; | |
77 | }; | |
78 | /* | |
79 | * Attribute Decoding | |
80 | */ | |
81 | ||
82 | /* Color */ | |
83 | #define attr_fgcol(fgshift,s) \ | |
84 | (((s) >> (fgshift)) & 0x0f) | |
85 | #define attr_bgcol(bgshift,s) \ | |
86 | (((s) >> (bgshift)) & 0x0f) | |
87 | #define attr_bgcol_ec(bgshift,vc) \ | |
88 | ((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0) | |
89 | #define attr_fgcol_ec(fgshift,vc) \ | |
90 | ((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0) | |
91 | ||
92 | /* Monochrome */ | |
93 | #define attr_bold(s) \ | |
94 | ((s) & 0x200) | |
95 | #define attr_reverse(s) \ | |
96 | ((s) & 0x800) | |
97 | #define attr_underline(s) \ | |
98 | ((s) & 0x400) | |
99 | #define attr_blink(s) \ | |
100 | ((s) & 0x8000) | |
101 | ||
102 | /* Font */ | |
103 | #define REFCOUNT(fd) (((int *)(fd))[-1]) | |
104 | #define FNTSIZE(fd) (((int *)(fd))[-2]) | |
105 | #define FNTCHARCNT(fd) (((int *)(fd))[-3]) | |
106 | #define FNTSUM(fd) (((int *)(fd))[-4]) | |
107 | #define FONT_EXTRA_WORDS 4 | |
108 | ||
109 | /* | |
110 | * Scroll Method | |
111 | */ | |
112 | ||
113 | /* There are several methods fbcon can use to move text around the screen: | |
114 | * | |
115 | * Operation Pan Wrap | |
116 | *--------------------------------------------- | |
117 | * SCROLL_MOVE copyarea No No | |
118 | * SCROLL_PAN_MOVE copyarea Yes No | |
119 | * SCROLL_WRAP_MOVE copyarea No Yes | |
120 | * SCROLL_REDRAW imageblit No No | |
121 | * SCROLL_PAN_REDRAW imageblit Yes No | |
122 | * SCROLL_WRAP_REDRAW imageblit No Yes | |
123 | * | |
124 | * (SCROLL_WRAP_REDRAW is not implemented yet) | |
125 | * | |
126 | * In general, fbcon will choose the best scrolling | |
127 | * method based on the rule below: | |
128 | * | |
129 | * Pan/Wrap > accel imageblit > accel copyarea > | |
130 | * soft imageblit > (soft copyarea) | |
131 | * | |
132 | * Exception to the rule: Pan + accel copyarea is | |
133 | * preferred over Pan + accel imageblit. | |
134 | * | |
135 | * The above is typical for PCI/AGP cards. Unless | |
136 | * overridden, fbcon will never use soft copyarea. | |
137 | * | |
138 | * If you need to override the above rule, set the | |
139 | * appropriate flags in fb_info->flags. For example, | |
140 | * to prefer copyarea over imageblit, set | |
141 | * FBINFO_READS_FAST. | |
142 | * | |
143 | * Other notes: | |
144 | * + use the hardware engine to move the text | |
145 | * (hw-accelerated copyarea() and fillrect()) | |
146 | * + use hardware-supported panning on a large virtual screen | |
147 | * + amifb can not only pan, but also wrap the display by N lines | |
148 | * (i.e. visible line i = physical line (i+N) % yres). | |
149 | * + read what's already rendered on the screen and | |
150 | * write it in a different place (this is cfb_copyarea()) | |
151 | * + re-render the text to the screen | |
152 | * | |
153 | * Whether to use wrapping or panning can only be figured out at | |
154 | * runtime (when we know whether our font height is a multiple | |
155 | * of the pan/wrap step) | |
156 | * | |
157 | */ | |
158 | ||
159 | #define SCROLL_MOVE 0x001 | |
160 | #define SCROLL_PAN_MOVE 0x002 | |
161 | #define SCROLL_WRAP_MOVE 0x003 | |
162 | #define SCROLL_REDRAW 0x004 | |
163 | #define SCROLL_PAN_REDRAW 0x005 | |
164 | ||
165 | #ifdef CONFIG_FB_TILEBLITTING | |
166 | extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info, | |
167 | struct display *p, struct fbcon_ops *ops); | |
168 | #endif | |
169 | extern void fbcon_set_bitops(struct fbcon_ops *ops); | |
170 | ||
171 | #endif /* _VIDEO_FBCON_H */ |