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