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
28 struct fbcon_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 inverse; /* != 0 text black on white as default */
33 short yscroll; /* Hardware scrolling */
34 int vrows; /* number of virtual rows */
35 int cursor_shape;
36 int con_rotate;
37 u32 xres_virtual;
38 u32 yres_virtual;
39 u32 height;
40 u32 width;
41 u32 bits_per_pixel;
42 u32 grayscale;
43 u32 nonstd;
44 u32 accel_flags;
45 u32 rotate;
46 struct fb_bitfield red;
47 struct fb_bitfield green;
48 struct fb_bitfield blue;
49 struct fb_bitfield transp;
50 const struct fb_videomode *mode;
51 };
52
53 struct fbcon_ops {
54 void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
55 int sx, int height, int width);
56 void (*putcs)(struct vc_data *vc, struct fb_info *info,
57 const unsigned short *s, int count, int yy, int xx,
58 int fg, int bg);
59 void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
60 int color, int bottom_only);
61 void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
62 int fg, int bg);
63 int (*update_start)(struct fb_info *info);
64 int (*rotate_font)(struct fb_info *info, struct vc_data *vc);
65 struct fb_var_screeninfo var; /* copy of the current fb_var_screeninfo */
66 struct timer_list cursor_timer; /* Cursor timer */
67 struct fb_cursor cursor_state;
68 struct fbcon_display *p;
69 struct fb_info *info;
70 int currcon; /* Current VC. */
71 int cur_blink_jiffies;
72 int cursor_flash;
73 int cursor_reset;
74 int blank_state;
75 int graphics;
76 int save_graphics; /* for debug enter/leave */
77 int flags;
78 int rotate;
79 int cur_rotate;
80 char *cursor_data;
81 u8 *fontbuffer;
82 u8 *fontdata;
83 u8 *cursor_src;
84 u32 cursor_size;
85 u32 fd_size;
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) \
95 (((s) >> (bgshift)) & 0x0f)
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
107
mono_col(const struct fb_info * info)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);
113 return (~(0xfff << max_len)) & 0xff;
114 }
115
attr_col_ec(int shift,struct vc_data * vc,struct fb_info * info,int is_fg)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
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)
151
152 #ifdef CONFIG_FB_TILEBLITTING
153 extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
154 #endif
155 extern void fbcon_set_bitops(struct fbcon_ops *ops);
156 extern int soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
157
158 #define FBCON_ATTRIBUTE_UNDERLINE 1
159 #define FBCON_ATTRIBUTE_REVERSE 2
160 #define FBCON_ATTRIBUTE_BOLD 4
161
real_y(struct fbcon_display * p,int ypos)162 static inline int real_y(struct fbcon_display *p, int ypos)
163 {
164 int rows = p->vrows;
165
166 ypos += p->yscroll;
167 return ypos < rows ? ypos : ypos - rows;
168 }
169
170
get_attribute(struct fb_info * info,u16 c)171 static inline int get_attribute(struct fb_info *info, u16 c)
172 {
173 int attribute = 0;
174
175 if (fb_get_color_depth(&info->var, &info->fix) == 1) {
176 if (attr_underline(c))
177 attribute |= FBCON_ATTRIBUTE_UNDERLINE;
178 if (attr_reverse(c))
179 attribute |= FBCON_ATTRIBUTE_REVERSE;
180 if (attr_bold(c))
181 attribute |= FBCON_ATTRIBUTE_BOLD;
182 }
183
184 return attribute;
185 }
186
187 #define FBCON_SWAP(i,r,v) ({ \
188 typeof(r) _r = (r); \
189 typeof(v) _v = (v); \
190 (void) (&_r == &_v); \
191 (i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; })
192
193 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
194 extern void fbcon_set_rotate(struct fbcon_ops *ops);
195 #else
196 #define fbcon_set_rotate(x) do {} while(0)
197 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
198
199 #endif /* _VIDEO_FBCON_H */
200