include/video/uvesafb.h

   1 #ifndef _UVESAFB_H
   2 #define _UVESAFB_H
   3
   4 #include <linux/types.h>
   5
   6 struct 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
  32 struct 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 */
  44 struct 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 */
  63 struct 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 */
  86 struct 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
 155 struct uvesafb_pal_entry {
 156         u_char blue, green, red, pad;
 157 } __attribute__ ((packed));
 158
 159 struct uvesafb_ktask {
 160         struct uvesafb_task t;
 161         void *buf;
 162         struct completion *done;
 163         u32 ack;
 164 };
 165
 166 static int uvesafb_exec(struct uvesafb_ktask *tsk);
 167
 168 #define UVESAFB_EXACT_RES       1
 169 #define UVESAFB_EXACT_DEPTH     2
 170
 171 struct 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 */