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fbdev: Add simple fbdev implementation
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Add an fbdev implementation as desired by Xorg.

Not-Yet-Signed-off-by: Pedro Falcato <[email protected]>
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@heatd
heatd committed Jul 11, 2024
1 parent 4d80409 commit b2a56ff
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280 changes: 280 additions & 0 deletions kernel/kernel/fbpriv.h
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/*
* copied from from linux kernel 2.2.4
* removed internal stuff (#ifdef __KERNEL__)
*/

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#ifndef _LINUX_FB_H
#define _LINUX_FB_H

#ifndef __onyx__

#include <asm/types.h>

#else

#include <stdint.h>

#endif

/* Definitions of frame buffers */

#define FB_MAJOR 29

#define FB_MODES_SHIFT 5 /* 32 modes per framebuffer */
#define FB_NUM_MINORS 256 /* 256 Minors */
#define FB_MAX (FB_NUM_MINORS / (1 << FB_MODES_SHIFT))
#define GET_FB_IDX(node) (MINOR(node) >> FB_MODES_SHIFT)

/* ioctls
0x46 is 'F' */
#define FBIOGET_VSCREENINFO 0x4600
#define FBIOPUT_VSCREENINFO 0x4601
#define FBIOGET_FSCREENINFO 0x4602
#define FBIOGETCMAP 0x4604
#define FBIOPUTCMAP 0x4605
#define FBIOPAN_DISPLAY 0x4606
/* 0x4607-0x460B are defined below */
/* #define FBIOGET_MONITORSPEC 0x460C */
/* #define FBIOPUT_MONITORSPEC 0x460D */
/* #define FBIOSWITCH_MONIBIT 0x460E */
#define FBIOGET_CON2FBMAP 0x460F
#define FBIOPUT_CON2FBMAP 0x4610
#define FBIOBLANK 0x4611

#define FB_TYPE_PACKED_PIXELS 0 /* Packed Pixels */
#define FB_TYPE_PLANES 1 /* Non interleaved planes */
#define FB_TYPE_INTERLEAVED_PLANES 2 /* Interleaved planes */
#define FB_TYPE_TEXT 3 /* Text/attributes */

#define FB_AUX_TEXT_MDA 0 /* Monochrome text */
#define FB_AUX_TEXT_CGA 1 /* CGA/EGA/VGA Color text */
#define FB_AUX_TEXT_S3_MMIO 2 /* S3 MMIO fasttext */
#define FB_AUX_TEXT_MGA_STEP16 3 /* MGA Millenium I: text, attr, 14 reserved bytes */
#define FB_AUX_TEXT_MGA_STEP8 4 /* other MGAs: text, attr, 6 reserved bytes */

#define FB_VISUAL_MONO01 0 /* Monochr. 1=Black 0=White */
#define FB_VISUAL_MONO10 1 /* Monochr. 1=White 0=Black */
#define FB_VISUAL_TRUECOLOR 2 /* True color */
#define FB_VISUAL_PSEUDOCOLOR 3 /* Pseudo color (like atari) */
#define FB_VISUAL_DIRECTCOLOR 4 /* Direct color */
#define FB_VISUAL_STATIC_PSEUDOCOLOR 5 /* Pseudo color readonly */

#define FB_ACCEL_NONE 0 /* no hardware accelerator */
#define FB_ACCEL_ATARIBLITT 1 /* Atari Blitter */
#define FB_ACCEL_AMIGABLITT 2 /* Amiga Blitter */
#define FB_ACCEL_S3_TRIO64 3 /* Cybervision64 (S3 Trio64) */
#define FB_ACCEL_NCR_77C32BLT 4 /* RetinaZ3 (NCR 77C32BLT) */
#define FB_ACCEL_S3_VIRGE 5 /* Cybervision64/3D (S3 ViRGE) */
#define FB_ACCEL_ATI_MACH64GX 6 /* ATI Mach 64GX family */
#define FB_ACCEL_DEC_TGA 7 /* DEC 21030 TGA */
#define FB_ACCEL_ATI_MACH64CT 8 /* ATI Mach 64CT family */
#define FB_ACCEL_ATI_MACH64VT 9 /* ATI Mach 64CT family VT class */
#define FB_ACCEL_ATI_MACH64GT 10 /* ATI Mach 64CT family GT class */
#define FB_ACCEL_SUN_CREATOR 11 /* Sun Creator/Creator3D */
#define FB_ACCEL_SUN_CGSIX 12 /* Sun cg6 */
#define FB_ACCEL_SUN_LEO 13 /* Sun leo/zx */
#define FB_ACCEL_IMS_TWINTURBO 14 /* IMS Twin Turbo */
#define FB_ACCEL_3DLABS_PERMEDIA2 15 /* 3Dlabs Permedia 2 */
#define FB_ACCEL_MATROX_MGA2064W 16 /* Matrox MGA2064W (Millenium) */
#define FB_ACCEL_MATROX_MGA1064SG 17 /* Matrox MGA1064SG (Mystique) */
#define FB_ACCEL_MATROX_MGA2164W 18 /* Matrox MGA2164W (Millenium II) */
#define FB_ACCEL_MATROX_MGA2164W_AGP 19 /* Matrox MGA2164W (Millenium II) */
#define FB_ACCEL_MATROX_MGAG100 20 /* Matrox G100 (Productiva G100) */
#define FB_ACCEL_MATROX_MGAG200 21 /* Matrox G200 (Myst, Mill, ...) */
#define FB_ACCEL_SUN_CG14 22 /* Sun cgfourteen */
#define FB_ACCEL_SUN_BWTWO 23 /* Sun bwtwo */
#define FB_ACCEL_SUN_CGTHREE 24 /* Sun cgthree */
#define FB_ACCEL_SUN_TCX 25 /* Sun tcx */
#define FB_ACCEL_MATROX_MGAG400 26 /* Matrox G400 */
#define FB_ACCEL_NV3 27 /* nVidia RIVA 128 */
#define FB_ACCEL_NV4 28 /* nVidia RIVA TNT */
#define FB_ACCEL_NV5 29 /* nVidia RIVA TNT2 */
#define FB_ACCEL_CT_6555x 30 /* C&T 6555x */
#define FB_ACCEL_3DFX_BANSHEE 31 /* 3Dfx Banshee */
#define FB_ACCEL_ATI_RAGE128 32 /* ATI Rage128 family */

struct fb_fix_screeninfo
{
char id[16]; /* identification string eg "TT Builtin" */
char *smem_start; /* Start of frame buffer mem */
/* (physical address) */
uint32_t smem_len; /* Length of frame buffer mem */
uint32_t type; /* see FB_TYPE_* */
uint32_t type_aux; /* Interleave for interleaved Planes */
uint32_t visual; /* see FB_VISUAL_* */
uint16_t xpanstep; /* zero if no hardware panning */
uint16_t ypanstep; /* zero if no hardware panning */
uint16_t ywrapstep; /* zero if no hardware ywrap */
uint32_t line_length; /* length of a line in bytes */
char *mmio_start; /* Start of Memory Mapped I/O */
/* (physical address) */
uint32_t mmio_len; /* Length of Memory Mapped I/O */
uint32_t accel; /* Type of acceleration available */
uint16_t reserved[3]; /* Reserved for future compatibility */
};

/* Interpretation of offset for color fields: All offsets are from the right,
* inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you
* can use the offset as right argument to <<). A pixel afterwards is a bit
* stream and is written to video memory as that unmodified. This implies
* big-endian byte order if bits_per_pixel is greater than 8.
*/
struct fb_bitfield
{
uint32_t offset; /* beginning of bitfield */
uint32_t length; /* length of bitfield */
uint32_t msb_right; /* != 0 : Most significant bit is */
/* right */
};

#define FB_NONSTD_HAM 1 /* Hold-And-Modify (HAM) */

#define FB_ACTIVATE_NOW 0 /* set values immediately (or vbl) */
#define FB_ACTIVATE_NXTOPEN 1 /* activate on next open */
#define FB_ACTIVATE_TEST 2 /* don't set, round up impossible */
#define FB_ACTIVATE_MASK 15
/* values */
#define FB_ACTIVATE_VBL 16 /* activate values on next vbl */
#define FB_CHANGE_CMAP_VBL 32 /* change colormap on vbl */
#define FB_ACTIVATE_ALL 64 /* change all VCs on this fb */

#define FB_ACCELF_TEXT 1 /* text mode acceleration */

#define FB_SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active */
#define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */
#define FB_SYNC_EXT 4 /* external sync */
#define FB_SYNC_COMP_HIGH_ACT 8 /* composite sync high active */
#define FB_SYNC_BROADCAST 16 /* broadcast video timings */
/* vtotal = 144d/288n/576i => PAL */
/* vtotal = 121d/242n/484i => NTSC */
#define FB_SYNC_ON_GREEN 32 /* sync on green */

#define FB_VMODE_NONINTERLACED 0 /* non interlaced */
#define FB_VMODE_INTERLACED 1 /* interlaced */
#define FB_VMODE_DOUBLE 2 /* double scan */
#define FB_VMODE_MASK 255

#define FB_VMODE_YWRAP 256 /* ywrap instead of panning */
#define FB_VMODE_SMOOTH_XPAN 512 /* smooth xpan possible (internally used) */
#define FB_VMODE_CONUPDATE 512 /* don't update x/yoffset */

struct fb_var_screeninfo
{
uint32_t xres; /* visible resolution */
uint32_t yres;
uint32_t xres_virtual; /* virtual resolution */
uint32_t yres_virtual;
uint32_t xoffset; /* offset from virtual to visible */
uint32_t yoffset; /* resolution */

uint32_t bits_per_pixel; /* guess what */
uint32_t grayscale; /* != 0 Graylevels instead of colors */

struct fb_bitfield red; /* bitfield in fb mem if true color, */
struct fb_bitfield green; /* else only length is significant */
struct fb_bitfield blue;
struct fb_bitfield transp; /* transparency */

uint32_t nonstd; /* != 0 Non standard pixel format */

uint32_t activate; /* see FB_ACTIVATE_* */

uint32_t height; /* height of picture in mm */
uint32_t width; /* width of picture in mm */

uint32_t accel_flags; /* acceleration flags (hints) */

/* Timing: All values in pixclocks, except pixclock (of course) */
uint32_t pixclock; /* pixel clock in ps (pico seconds) */
uint32_t left_margin; /* time from sync to picture */
uint32_t right_margin; /* time from picture to sync */
uint32_t upper_margin; /* time from sync to picture */
uint32_t lower_margin;
uint32_t hsync_len; /* length of horizontal sync */
uint32_t vsync_len; /* length of vertical sync */
uint32_t sync; /* see FB_SYNC_* */
uint32_t vmode; /* see FB_VMODE_* */
uint32_t reserved[6]; /* Reserved for future compatibility */
};

struct fb_cmap
{
uint32_t start; /* First entry */
uint32_t len; /* Number of entries */
uint16_t *red; /* Red values */
uint16_t *green;
uint16_t *blue;
uint16_t *transp; /* transparency, can be NULL */
};

struct fb_con2fbmap
{
uint32_t console;
uint32_t framebuffer;
};

struct fb_monspecs
{
uint32_t hfmin; /* hfreq lower limit (Hz) */
uint32_t hfmax; /* hfreq upper limit (Hz) */
uint16_t vfmin; /* vfreq lower limit (Hz) */
uint16_t vfmax; /* vfreq upper limit (Hz) */
unsigned dpms : 1; /* supports DPMS */
};

#if 1

#define FBCMD_GET_CURRENTPAR 0xDEAD0005
#define FBCMD_SET_CURRENTPAR 0xDEAD8005

#endif

#if 1 /* Preliminary */

/*
* Hardware Cursor
*/

#define FBIOGET_FCURSORINFO 0x4607
#define FBIOGET_VCURSORINFO 0x4608
#define FBIOPUT_VCURSORINFO 0x4609
#define FBIOGET_CURSORSTATE 0x460A
#define FBIOPUT_CURSORSTATE 0x460B

struct fb_fix_cursorinfo
{
uint16_t crsr_width; /* width and height of the cursor in */
uint16_t crsr_height; /* pixels (zero if no cursor) */
uint16_t crsr_xsize; /* cursor size in display pixels */
uint16_t crsr_ysize;
uint16_t crsr_color1; /* colormap entry for cursor color1 */
uint16_t crsr_color2; /* colormap entry for cursor color2 */
};

struct fb_var_cursorinfo
{
uint16_t width;
uint16_t height;
uint16_t xspot;
uint16_t yspot;
uint8_t data[1]; /* field with [height][width] */
};

struct fb_cursorstate
{
int16_t xoffset;
int16_t yoffset;
uint16_t mode;
};

#define FB_CURSOR_OFF 0
#define FB_CURSOR_ON 1
#define FB_CURSOR_FLASH 2

#endif /* Preliminary */

#endif /* _LINUX_FB_H */
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