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 */
9 struct 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 */
32 struct 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 
101 struct uvesafb_pal_entry {
102 	u_char blue, green, red, pad;
103 } __attribute__ ((packed));
104 
105 struct uvesafb_ktask {
106 	struct uvesafb_task t;
107 	void *buf;
108 	struct completion *done;
109 	u32 ack;
110 };
111 
112 #define UVESAFB_EXACT_RES	1
113 #define UVESAFB_EXACT_DEPTH	2
114 
115 struct uvesafb_par {
116 	struct vbe_ib vbe_ib;		/* VBE Info Block */
117 	struct vbe_mode_ib *vbe_modes;	/* list of supported VBE modes */
118 	int vbe_modes_cnt;
119 
120 	u8 nocrtc;
121 	u8 ypan;			/* 0 - nothing, 1 - ypan, 2 - ywrap */
122 	u8 pmi_setpal;			/* PMI for palette changes */
123 	u16 *pmi_base;			/* protected mode interface location */
124 	void *pmi_start;
125 	void *pmi_pal;
126 	u8 *vbe_state_orig;		/*
127 					 * original hardware state, before the
128 					 * driver was loaded
129 					 */
130 	u8 *vbe_state_saved;		/* state saved by fb_save_state */
131 	int vbe_state_size;
132 	atomic_t ref_count;
133 
134 	int mode_idx;
135 	struct vbe_crtc_ib crtc;
136 	int mtrr_handle;
137 };
138 
139 #endif /* _UVESAFB_H */
140