1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _UVESAFB_H
3#define _UVESAFB_H
4
5#include <uapi/video/uvesafb.h>
6
7
8/* VBE CRTC Info Block */
9struct vbe_crtc_ib {
10 u16 horiz_total;
11 u16 horiz_start;
12 u16 horiz_end;
13 u16 vert_total;
14 u16 vert_start;
15 u16 vert_end;
16 u8 flags;
17 u32 pixel_clock;
18 u16 refresh_rate;
19 u8 reserved[40];
20} __attribute__ ((packed));
21
22#define VBE_MODE_VGACOMPAT 0x20
23#define VBE_MODE_COLOR 0x08
24#define VBE_MODE_SUPPORTEDHW 0x01
25#define VBE_MODE_GRAPHICS 0x10
26#define VBE_MODE_LFB 0x80
27
28#define VBE_MODE_MASK (VBE_MODE_COLOR | VBE_MODE_SUPPORTEDHW | \
29 VBE_MODE_GRAPHICS | VBE_MODE_LFB)
30
31/* VBE Mode Info Block */
32struct vbe_mode_ib {
33 /* for all VBE revisions */
34 u16 mode_attr;
35 u8 winA_attr;
36 u8 winB_attr;
37 u16 win_granularity;
38 u16 win_size;
39 u16 winA_seg;
40 u16 winB_seg;
41 u32 win_func_ptr;
42 u16 bytes_per_scan_line;
43
44 /* for VBE 1.2+ */
45 u16 x_res;
46 u16 y_res;
47 u8 x_char_size;
48 u8 y_char_size;
49 u8 planes;
50 u8 bits_per_pixel;
51 u8 banks;
52 u8 memory_model;
53 u8 bank_size;
54 u8 image_pages;
55 u8 reserved1;
56
57 /* Direct color fields for direct/6 and YUV/7 memory models. */
58 /* Offsets are bit positions of lsb in the mask. */
59 u8 red_len;
60 u8 red_off;
61 u8 green_len;
62 u8 green_off;
63 u8 blue_len;
64 u8 blue_off;
65 u8 rsvd_len;
66 u8 rsvd_off;
67 u8 direct_color_info; /* direct color mode attributes */
68
69 /* for VBE 2.0+ */
70 u32 phys_base_ptr;
71 u8 reserved2[6];
72
73 /* for VBE 3.0+ */
74 u16 lin_bytes_per_scan_line;
75 u8 bnk_image_pages;
76 u8 lin_image_pages;
77 u8 lin_red_len;
78 u8 lin_red_off;
79 u8 lin_green_len;
80 u8 lin_green_off;
81 u8 lin_blue_len;
82 u8 lin_blue_off;
83 u8 lin_rsvd_len;
84 u8 lin_rsvd_off;
85 u32 max_pixel_clock;
86 u16 mode_id;
87 u8 depth;
88} __attribute__ ((packed));
89
90#define UVESAFB_DEFAULT_MODE "640x480-16"
91
92/* How long to wait for a reply from userspace [ms] */
93#define UVESAFB_TIMEOUT 5000
94
95/* Max number of concurrent tasks */
96#define UVESAFB_TASKS_MAX 16
97
98#define dac_reg (0x3c8)
99#define dac_val (0x3c9)
100
101struct uvesafb_pal_entry {
102 u_char blue, green, red, pad;
103} __attribute__ ((packed));
104
105struct uvesafb_ktask {
106 struct uvesafb_task t;
107 void *buf;
108 struct completion *done;
109 u32 ack;
110};
111
112static int uvesafb_exec(struct uvesafb_ktask *tsk);
113
114#define UVESAFB_EXACT_RES 1
115#define UVESAFB_EXACT_DEPTH 2
116
117struct uvesafb_par {
118 struct vbe_ib vbe_ib; /* VBE Info Block */
119 struct vbe_mode_ib *vbe_modes; /* list of supported VBE modes */
120 int vbe_modes_cnt;
121
122 u8 nocrtc;
123 u8 ypan; /* 0 - nothing, 1 - ypan, 2 - ywrap */
124 u8 pmi_setpal; /* PMI for palette changes */
125 u16 *pmi_base; /* protected mode interface location */
126 void *pmi_start;
127 void *pmi_pal;
128 u8 *vbe_state_orig; /*
129 * original hardware state, before the
130 * driver was loaded
131 */
132 u8 *vbe_state_saved; /* state saved by fb_save_state */
133 int vbe_state_size;
134 atomic_t ref_count;
135
136 int mode_idx;
137 struct vbe_crtc_ib crtc;
138 int mtrr_handle;
139};
140
141#endif /* _UVESAFB_H */
142