linux/include/video/uvesafb.h
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   1#ifndef _UVESAFB_H
   2#define _UVESAFB_H
   3
   4#include <linux/types.h>
   5
   6struct v86_regs {
   7        __u32 ebx;
   8        __u32 ecx;
   9        __u32 edx;
  10        __u32 esi;
  11        __u32 edi;
  12        __u32 ebp;
  13        __u32 eax;
  14        __u32 eip;
  15        __u32 eflags;
  16        __u32 esp;
  17        __u16 cs;
  18        __u16 ss;
  19        __u16 es;
  20        __u16 ds;
  21        __u16 fs;
  22        __u16 gs;
  23};
  24
  25/* Task flags */
  26#define TF_VBEIB        0x01
  27#define TF_BUF_ESDI     0x02
  28#define TF_BUF_ESBX     0x04
  29#define TF_BUF_RET      0x08
  30#define TF_EXIT         0x10
  31
  32struct uvesafb_task {
  33        __u8 flags;
  34        int buf_len;
  35        struct v86_regs regs;
  36};
  37
  38/* Constants for the capabilities field
  39 * in vbe_ib */
  40#define VBE_CAP_CAN_SWITCH_DAC  0x01
  41#define VBE_CAP_VGACOMPAT       0x02
  42
  43/* The VBE Info Block */
  44struct vbe_ib {
  45        char  vbe_signature[4];
  46        __u16 vbe_version;
  47        __u32 oem_string_ptr;
  48        __u32 capabilities;
  49        __u32 mode_list_ptr;
  50        __u16 total_memory;
  51        __u16 oem_software_rev;
  52        __u32 oem_vendor_name_ptr;
  53        __u32 oem_product_name_ptr;
  54        __u32 oem_product_rev_ptr;
  55        __u8  reserved[222];
  56        char  oem_data[256];
  57        char  misc_data[512];
  58} __attribute__ ((packed));
  59
  60#ifdef __KERNEL__
  61
  62/* VBE CRTC Info Block */
  63struct vbe_crtc_ib {
  64        u16 horiz_total;
  65        u16 horiz_start;
  66        u16 horiz_end;
  67        u16 vert_total;
  68        u16 vert_start;
  69        u16 vert_end;
  70        u8  flags;
  71        u32 pixel_clock;
  72        u16 refresh_rate;
  73        u8  reserved[40];
  74} __attribute__ ((packed));
  75
  76#define VBE_MODE_VGACOMPAT      0x20
  77#define VBE_MODE_COLOR          0x08
  78#define VBE_MODE_SUPPORTEDHW    0x01
  79#define VBE_MODE_GRAPHICS       0x10
  80#define VBE_MODE_LFB            0x80
  81
  82#define VBE_MODE_MASK           (VBE_MODE_COLOR | VBE_MODE_SUPPORTEDHW | \
  83                                VBE_MODE_GRAPHICS | VBE_MODE_LFB)
  84
  85/* VBE Mode Info Block */
  86struct vbe_mode_ib {
  87        /* for all VBE revisions */
  88        u16 mode_attr;
  89        u8  winA_attr;
  90        u8  winB_attr;
  91        u16 win_granularity;
  92        u16 win_size;
  93        u16 winA_seg;
  94        u16 winB_seg;
  95        u32 win_func_ptr;
  96        u16 bytes_per_scan_line;
  97
  98        /* for VBE 1.2+ */
  99        u16 x_res;
 100        u16 y_res;
 101        u8  x_char_size;
 102        u8  y_char_size;
 103        u8  planes;
 104        u8  bits_per_pixel;
 105        u8  banks;
 106        u8  memory_model;
 107        u8  bank_size;
 108        u8  image_pages;
 109        u8  reserved1;
 110
 111        /* Direct color fields for direct/6 and YUV/7 memory models. */
 112        /* Offsets are bit positions of lsb in the mask. */
 113        u8  red_len;
 114        u8  red_off;
 115        u8  green_len;
 116        u8  green_off;
 117        u8  blue_len;
 118        u8  blue_off;
 119        u8  rsvd_len;
 120        u8  rsvd_off;
 121        u8  direct_color_info;  /* direct color mode attributes */
 122
 123        /* for VBE 2.0+ */
 124        u32 phys_base_ptr;
 125        u8  reserved2[6];
 126
 127        /* for VBE 3.0+ */
 128        u16 lin_bytes_per_scan_line;
 129        u8  bnk_image_pages;
 130        u8  lin_image_pages;
 131        u8  lin_red_len;
 132        u8  lin_red_off;
 133        u8  lin_green_len;
 134        u8  lin_green_off;
 135        u8  lin_blue_len;
 136        u8  lin_blue_off;
 137        u8  lin_rsvd_len;
 138        u8  lin_rsvd_off;
 139        u32 max_pixel_clock;
 140        u16 mode_id;
 141        u8  depth;
 142} __attribute__ ((packed));
 143
 144#define UVESAFB_DEFAULT_MODE "640x480-16"
 145
 146/* How long to wait for a reply from userspace [ms] */
 147#define UVESAFB_TIMEOUT 5000
 148
 149/* Max number of concurrent tasks */
 150#define UVESAFB_TASKS_MAX 16
 151
 152#define dac_reg (0x3c8)
 153#define dac_val (0x3c9)
 154
 155struct uvesafb_pal_entry {
 156        u_char blue, green, red, pad;
 157} __attribute__ ((packed));
 158
 159struct uvesafb_ktask {
 160        struct uvesafb_task t;
 161        void *buf;
 162        struct completion *done;
 163        u32 ack;
 164};
 165
 166static int uvesafb_exec(struct uvesafb_ktask *tsk);
 167
 168#define UVESAFB_EXACT_RES       1
 169#define UVESAFB_EXACT_DEPTH     2
 170
 171struct uvesafb_par {
 172        struct vbe_ib vbe_ib;           /* VBE Info Block */
 173        struct vbe_mode_ib *vbe_modes;  /* list of supported VBE modes */
 174        int vbe_modes_cnt;
 175
 176        u8 nocrtc;
 177        u8 ypan;                        /* 0 - nothing, 1 - ypan, 2 - ywrap */
 178        u8 pmi_setpal;                  /* PMI for palette changes */
 179        u16 *pmi_base;                  /* protected mode interface location */
 180        void *pmi_start;
 181        void *pmi_pal;
 182        u8 *vbe_state_orig;             /*
 183                                         * original hardware state, before the
 184                                         * driver was loaded
 185                                         */
 186        u8 *vbe_state_saved;            /* state saved by fb_save_state */
 187        int vbe_state_size;
 188        atomic_t ref_count;
 189
 190        int mode_idx;
 191        struct vbe_crtc_ib crtc;
 192};
 193
 194#endif /* __KERNEL__ */
 195#endif /* _UVESAFB_H */
 196
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