xref: /openbmc/linux/include/video/uvesafb.h (revision 22246614)
1 #ifndef _UVESAFB_H
2 #define _UVESAFB_H
3 
4 struct v86_regs {
5 	__u32 ebx;
6 	__u32 ecx;
7 	__u32 edx;
8 	__u32 esi;
9 	__u32 edi;
10 	__u32 ebp;
11 	__u32 eax;
12 	__u32 eip;
13 	__u32 eflags;
14 	__u32 esp;
15 	__u16 cs;
16 	__u16 ss;
17 	__u16 es;
18 	__u16 ds;
19 	__u16 fs;
20 	__u16 gs;
21 };
22 
23 /* Task flags */
24 #define TF_VBEIB	0x01
25 #define TF_BUF_ESDI	0x02
26 #define TF_BUF_ESBX	0x04
27 #define TF_BUF_RET	0x08
28 #define TF_EXIT		0x10
29 
30 struct uvesafb_task {
31 	__u8 flags;
32 	int buf_len;
33 	struct v86_regs regs;
34 };
35 
36 /* Constants for the capabilities field
37  * in vbe_ib */
38 #define VBE_CAP_CAN_SWITCH_DAC	0x01
39 #define VBE_CAP_VGACOMPAT	0x02
40 
41 /* The VBE Info Block */
42 struct vbe_ib {
43 	char  vbe_signature[4];
44 	__u16 vbe_version;
45 	__u32 oem_string_ptr;
46 	__u32 capabilities;
47 	__u32 mode_list_ptr;
48 	__u16 total_memory;
49 	__u16 oem_software_rev;
50 	__u32 oem_vendor_name_ptr;
51 	__u32 oem_product_name_ptr;
52 	__u32 oem_product_rev_ptr;
53 	__u8  reserved[222];
54 	char  oem_data[256];
55 	char  misc_data[512];
56 } __attribute__ ((packed));
57 
58 #ifdef __KERNEL__
59 
60 /* VBE CRTC Info Block */
61 struct vbe_crtc_ib {
62 	u16 horiz_total;
63 	u16 horiz_start;
64 	u16 horiz_end;
65 	u16 vert_total;
66 	u16 vert_start;
67 	u16 vert_end;
68 	u8  flags;
69 	u32 pixel_clock;
70 	u16 refresh_rate;
71 	u8  reserved[40];
72 } __attribute__ ((packed));
73 
74 #define VBE_MODE_VGACOMPAT	0x20
75 #define VBE_MODE_COLOR		0x08
76 #define VBE_MODE_SUPPORTEDHW	0x01
77 #define VBE_MODE_GRAPHICS	0x10
78 #define VBE_MODE_LFB		0x80
79 
80 #define VBE_MODE_MASK		(VBE_MODE_COLOR | VBE_MODE_SUPPORTEDHW | \
81 				VBE_MODE_GRAPHICS | VBE_MODE_LFB)
82 
83 /* VBE Mode Info Block */
84 struct vbe_mode_ib {
85 	/* for all VBE revisions */
86 	u16 mode_attr;
87 	u8  winA_attr;
88 	u8  winB_attr;
89 	u16 win_granularity;
90 	u16 win_size;
91 	u16 winA_seg;
92 	u16 winB_seg;
93 	u32 win_func_ptr;
94 	u16 bytes_per_scan_line;
95 
96 	/* for VBE 1.2+ */
97 	u16 x_res;
98 	u16 y_res;
99 	u8  x_char_size;
100 	u8  y_char_size;
101 	u8  planes;
102 	u8  bits_per_pixel;
103 	u8  banks;
104 	u8  memory_model;
105 	u8  bank_size;
106 	u8  image_pages;
107 	u8  reserved1;
108 
109 	/* Direct color fields for direct/6 and YUV/7 memory models. */
110 	/* Offsets are bit positions of lsb in the mask. */
111 	u8  red_len;
112 	u8  red_off;
113 	u8  green_len;
114 	u8  green_off;
115 	u8  blue_len;
116 	u8  blue_off;
117 	u8  rsvd_len;
118 	u8  rsvd_off;
119 	u8  direct_color_info;	/* direct color mode attributes */
120 
121 	/* for VBE 2.0+ */
122 	u32 phys_base_ptr;
123 	u8  reserved2[6];
124 
125 	/* for VBE 3.0+ */
126 	u16 lin_bytes_per_scan_line;
127 	u8  bnk_image_pages;
128 	u8  lin_image_pages;
129 	u8  lin_red_len;
130 	u8  lin_red_off;
131 	u8  lin_green_len;
132 	u8  lin_green_off;
133 	u8  lin_blue_len;
134 	u8  lin_blue_off;
135 	u8  lin_rsvd_len;
136 	u8  lin_rsvd_off;
137 	u32 max_pixel_clock;
138 	u16 mode_id;
139 	u8  depth;
140 } __attribute__ ((packed));
141 
142 #define UVESAFB_DEFAULT_MODE "640x480-16"
143 
144 /* How long to wait for a reply from userspace [ms] */
145 #define UVESAFB_TIMEOUT 5000
146 
147 /* Max number of concurrent tasks */
148 #define UVESAFB_TASKS_MAX 16
149 
150 #define dac_reg	(0x3c8)
151 #define dac_val	(0x3c9)
152 
153 struct uvesafb_pal_entry {
154 	u_char blue, green, red, pad;
155 } __attribute__ ((packed));
156 
157 struct uvesafb_ktask {
158 	struct uvesafb_task t;
159 	void *buf;
160 	struct completion *done;
161 	u32 ack;
162 };
163 
164 static int uvesafb_exec(struct uvesafb_ktask *tsk);
165 
166 #define UVESAFB_EXACT_RES	1
167 #define UVESAFB_EXACT_DEPTH	2
168 
169 struct uvesafb_par {
170 	struct vbe_ib vbe_ib;		/* VBE Info Block */
171 	struct vbe_mode_ib *vbe_modes;	/* list of supported VBE modes */
172 	int vbe_modes_cnt;
173 
174 	u8 nocrtc;
175 	u8 ypan;			/* 0 - nothing, 1 - ypan, 2 - ywrap */
176 	u8 pmi_setpal;			/* PMI for palette changes */
177 	u16 *pmi_base;			/* protected mode interface location */
178 	void *pmi_start;
179 	void *pmi_pal;
180 	u8 *vbe_state_orig;		/*
181 					 * original hardware state, before the
182 					 * driver was loaded
183 					 */
184 	u8 *vbe_state_saved;		/* state saved by fb_save_state */
185 	int vbe_state_size;
186 	atomic_t ref_count;
187 
188 	int mode_idx;
189 	struct vbe_crtc_ib crtc;
190 };
191 
192 #endif /* __KERNEL__ */
193 #endif /* _UVESAFB_H */
194