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uvesafb.h

#ifndef _UVESAFB_H
#define _UVESAFB_H

struct v86_regs {
      __u32 ebx;
      __u32 ecx;
      __u32 edx;
      __u32 esi;
      __u32 edi;
      __u32 ebp;
      __u32 eax;
      __u32 eip;
      __u32 eflags;
      __u32 esp;
      __u16 cs;
      __u16 ss;
      __u16 es;
      __u16 ds;
      __u16 fs;
      __u16 gs;
};

/* Task flags */
#define TF_VBEIB  0x01
#define TF_BUF_ESDI     0x02
#define TF_BUF_ESBX     0x04
#define TF_BUF_RET      0x08
#define TF_EXIT         0x10

struct uvesafb_task {
      __u8 flags;
      int buf_len;
      struct v86_regs regs;
};

/* Constants for the capabilities field
 * in vbe_ib */
#define VBE_CAP_CAN_SWITCH_DAC      0x01
#define VBE_CAP_VGACOMPAT     0x02

/* The VBE Info Block */
struct vbe_ib {
      char  vbe_signature[4];
      __u16 vbe_version;
      __u32 oem_string_ptr;
      __u32 capabilities;
      __u32 mode_list_ptr;
      __u16 total_memory;
      __u16 oem_software_rev;
      __u32 oem_vendor_name_ptr;
      __u32 oem_product_name_ptr;
      __u32 oem_product_rev_ptr;
      __u8  reserved[222];
      char  oem_data[256];
      char  misc_data[512];
} __attribute__ ((packed));

#ifdef __KERNEL__

/* VBE CRTC Info Block */
struct vbe_crtc_ib {
      u16 horiz_total;
      u16 horiz_start;
      u16 horiz_end;
      u16 vert_total;
      u16 vert_start;
      u16 vert_end;
      u8  flags;
      u32 pixel_clock;
      u16 refresh_rate;
      u8  reserved[40];
} __attribute__ ((packed));

#define VBE_MODE_VGACOMPAT    0x20
#define VBE_MODE_COLOR        0x08
#define VBE_MODE_SUPPORTEDHW  0x01
#define VBE_MODE_GRAPHICS     0x10
#define VBE_MODE_LFB          0x80

#define VBE_MODE_MASK         (VBE_MODE_COLOR | VBE_MODE_SUPPORTEDHW | \
                        VBE_MODE_GRAPHICS | VBE_MODE_LFB)

/* VBE Mode Info Block */
struct vbe_mode_ib {
      /* for all VBE revisions */
      u16 mode_attr;
      u8  winA_attr;
      u8  winB_attr;
      u16 win_granularity;
      u16 win_size;
      u16 winA_seg;
      u16 winB_seg;
      u32 win_func_ptr;
      u16 bytes_per_scan_line;

      /* for VBE 1.2+ */
      u16 x_res;
      u16 y_res;
      u8  x_char_size;
      u8  y_char_size;
      u8  planes;
      u8  bits_per_pixel;
      u8  banks;
      u8  memory_model;
      u8  bank_size;
      u8  image_pages;
      u8  reserved1;

      /* Direct color fields for direct/6 and YUV/7 memory models. */
      /* Offsets are bit positions of lsb in the mask. */
      u8  red_len;
      u8  red_off;
      u8  green_len;
      u8  green_off;
      u8  blue_len;
      u8  blue_off;
      u8  rsvd_len;
      u8  rsvd_off;
      u8  direct_color_info;  /* direct color mode attributes */

      /* for VBE 2.0+ */
      u32 phys_base_ptr;
      u8  reserved2[6];

      /* for VBE 3.0+ */
      u16 lin_bytes_per_scan_line;
      u8  bnk_image_pages;
      u8  lin_image_pages;
      u8  lin_red_len;
      u8  lin_red_off;
      u8  lin_green_len;
      u8  lin_green_off;
      u8  lin_blue_len;
      u8  lin_blue_off;
      u8  lin_rsvd_len;
      u8  lin_rsvd_off;
      u32 max_pixel_clock;
      u16 mode_id;
      u8  depth;
} __attribute__ ((packed));

#define UVESAFB_DEFAULT_MODE "640x480-16"

/* How long to wait for a reply from userspace [ms] */
#define UVESAFB_TIMEOUT 5000

/* Max number of concurrent tasks */
#define UVESAFB_TASKS_MAX 16

#define dac_reg   (0x3c8)
#define dac_val   (0x3c9)

struct uvesafb_pal_entry {
      u_char blue, green, red, pad;
} __attribute__ ((packed));

struct uvesafb_ktask {
      struct uvesafb_task t;
      void *buf;
      struct completion *done;
      u32 ack;
};

static int uvesafb_exec(struct uvesafb_ktask *tsk);

#define UVESAFB_EXACT_RES     1
#define UVESAFB_EXACT_DEPTH   2

struct uvesafb_par {
      struct vbe_ib vbe_ib;         /* VBE Info Block */
      struct vbe_mode_ib *vbe_modes;      /* list of supported VBE modes */
      int vbe_modes_cnt;

      u8 nocrtc;
      u8 ypan;                /* 0 - nothing, 1 - ypan, 2 - ywrap */
      u8 pmi_setpal;                /* PMI for palette changes */
      u16 *pmi_base;                /* protected mode interface location */
      void *pmi_start;
      void *pmi_pal;
      u8 *vbe_state_orig;           /*
                               * original hardware state, before the
                               * driver was loaded
                               */
      u8 *vbe_state_saved;          /* state saved by fb_save_state */
      int vbe_state_size;
      atomic_t ref_count;

      int mode_idx;
      struct vbe_crtc_ib crtc;
};

#endif /* __KERNEL__ */
#endif /* _UVESAFB_H */

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