/* *  linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver * *	Copyright (C) 1997 Geert Uytterhoeven * *  This file is subject to the terms and conditions of the GNU General Public *  License.  See the file COPYING in the main directory of this archive *  for more details. */ #ifndef _VIDEO_FBCON_H#define _VIDEO_FBCON_H #include <linux/compiler_types.h>#include <linux/font.h>#include <linux/types.h>#include <linux/vt_buffer.h>#include <linux/vt_kern.h>#include <linux/workqueue.h> #include <asm/io.h> struct fb_blit_caps;struct fb_info;struct fb_var_screeninfo;struct fb_videomode;    /*    *    This is the interface between the low-level console driver and the    *    low-level frame buffer device    */ struct fbcon_display {    /* Filled in by the low-level console driver */    font_data_t *fontdata;#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION    u_short scrollmode;             /* Scroll Method, use fb_scrollmode() */#endif    short yscroll;                  /* Hardware scrolling */    int vrows;                      /* number of virtual rows */    int cursor_shape;    int con_rotate;    u32 xres_virtual;    u32 yres_virtual;    u32 height;    u32 width;    u32 bits_per_pixel;    u32 grayscale;    u32 nonstd;    u32 accel_flags;    u32 rotate;    struct fb_bitfield red;    struct fb_bitfield green;    struct fb_bitfield blue;    struct fb_bitfield transp;    const struct fb_videomode *mode;}; struct fbcon_bitops {	void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,		      int sx, int dy, int dx, int height, int width);	void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,		      int sx, int height, int width, int fb, int bg);	void (*putcs)(struct vc_data *vc, struct fb_info *info,		      const unsigned short *s, int count, int yy, int xx,		      int fg, int bg);	void (*clear_margins)(struct vc_data *vc, struct fb_info *info,			      int color, int bottom_only);	void (*cursor)(struct vc_data *vc, struct fb_info *info,		       bool enable, int fg, int bg);	int  (*update_start)(struct fb_info *info);	int  (*rotate_font)(struct fb_info *info, struct vc_data *vc);}; struct fbcon_par {	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */	struct delayed_work cursor_work; /* Cursor timer */	struct fb_cursor cursor_state;	struct fbcon_display *p;	struct fb_info *info;        int    currcon;	                /* Current VC. */	int    cur_blink_jiffies;	int    cursor_flash;	int    cursor_reset;	int    blank_state;	int    graphics;	bool   initialized;	int    rotate;	char  *cursor_data;#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION	struct {		font_data_t *fontdata;  /* source font */		u8 *buf;                /* rotated glyphs */		size_t bufsize;		int buf_rotate;         /* rotation of buf */	} rotated;#endif	u8    *cursor_src;	u32    cursor_size; 	const struct fbcon_bitops *bitops;};     /*     *  Attribute Decoding     */ /* Color */#define attr_fgcol(fgshift,s)    \	(((s) >> (fgshift)) & 0x0f)#define attr_bgcol(bgshift,s)    \	(((s) >> (bgshift)) & 0x0f) /* Monochrome */#define attr_bold(s) \	((s) & 0x200)#define attr_reverse(s) \	((s) & 0x800)#define attr_underline(s) \	((s) & 0x400)#define attr_blink(s) \	((s) & 0x8000) static inline int mono_col(const struct fb_info *info){	__u32 max_len;	max_len = max(info->var.green.length, info->var.red.length);	max_len = max(info->var.blue.length, max_len);	return (~(0xfff << max_len)) & 0xff;}     /*     *  Scroll Method     */ /* There are several methods fbcon can use to move text around the screen: * *                     Operation   Pan    Wrap *--------------------------------------------- * SCROLL_MOVE         copyarea    No     No * SCROLL_PAN_MOVE     copyarea    Yes    No * SCROLL_WRAP_MOVE    copyarea    No     Yes * SCROLL_REDRAW       imageblit   No     No * SCROLL_PAN_REDRAW   imageblit   Yes    No * SCROLL_WRAP_REDRAW  imageblit   No     Yes * * (SCROLL_WRAP_REDRAW is not implemented yet) * * In general, fbcon will choose the best scrolling * method based on the rule below: * * Pan/Wrap > accel imageblit > accel copyarea > * soft imageblit > (soft copyarea) * * Exception to the rule: Pan + accel copyarea is * preferred over Pan + accel imageblit. * * The above is typical for PCI/AGP cards. Unless * overridden, fbcon will never use soft copyarea. * * If you need to override the above rule, set the * appropriate flags in fb_info->flags.  For example, * to prefer copyarea over imageblit, set * FBINFO_READS_FAST. * * Other notes: * + use the hardware engine to move the text *    (hw-accelerated copyarea() and fillrect()) * + use hardware-supported panning on a large virtual screen * + amifb can not only pan, but also wrap the display by N lines *    (i.e. visible line i = physical line (i+N) % yres). * + read what's already rendered on the screen and *     write it in a different place (this is cfb_copyarea()) * + re-render the text to the screen * * Whether to use wrapping or panning can only be figured out at * runtime (when we know whether our font height is a multiple * of the pan/wrap step) * */ #define SCROLL_MOVE	   0x001#define SCROLL_PAN_MOVE	   0x002#define SCROLL_WRAP_MOVE   0x003#define SCROLL_REDRAW	   0x004#define SCROLL_PAN_REDRAW  0x005 static inline u_short fb_scrollmode(struct fbcon_display *fb){#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION	return fb->scrollmode;#else	/* hardcoded to SCROLL_REDRAW if acceleration was disabled. */	return SCROLL_REDRAW;#endif}  #ifdef CONFIG_FB_TILEBLITTINGextern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);#endifextern void fbcon_set_bitops_ur(struct fbcon_par *par);extern int  soft_cursor(struct fb_info *info, struct fb_cursor *cursor); void fbcon_fill_cursor_mask(struct fbcon_par *par, struct vc_data *vc, unsigned char *mask); #define FBCON_ATTRIBUTE_UNDERLINE 1#define FBCON_ATTRIBUTE_REVERSE   2#define FBCON_ATTRIBUTE_BOLD      4 static inline int real_y(struct fbcon_display *p, int ypos){	int rows = p->vrows; 	ypos += p->yscroll;	return ypos < rows ? ypos : ypos - rows;}  static inline int get_attribute(struct fb_info *info, u16 c){	int attribute = 0; 	if (fb_get_color_depth(&info->var, &info->fix) == 1) {		if (attr_underline(c))			attribute |= FBCON_ATTRIBUTE_UNDERLINE;		if (attr_reverse(c))			attribute |= FBCON_ATTRIBUTE_REVERSE;		if (attr_bold(c))			attribute |= FBCON_ATTRIBUTE_BOLD;	} 	return attribute;} #define FBCON_SWAP(i,r,v) ({ \        typeof(r) _r = (r);  \        typeof(v) _v = (v);  \        (void) (&_r == &_v); \        (i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; }) #ifdef CONFIG_FRAMEBUFFER_CONSOLEvoid __init fb_console_init(void);void __exit fb_console_exit(void);int fbcon_fb_registered(struct fb_info *info);void fbcon_fb_unregistered(struct fb_info *info);void fbcon_fb_unbind(struct fb_info *info);void fbcon_suspended(struct fb_info *info);void fbcon_resumed(struct fb_info *info);int fbcon_mode_deleted(struct fb_info *info,		       struct fb_videomode *mode);void fbcon_delete_modelist(struct list_head *head);void fbcon_new_modelist(struct fb_info *info);void fbcon_get_requirement(struct fb_info *info,			   struct fb_blit_caps *caps);void fbcon_fb_blanked(struct fb_info *info, int blank);int  fbcon_modechange_possible(struct fb_info *info,			       struct fb_var_screeninfo *var);void fbcon_update_vcs(struct fb_info *info, bool all);void fbcon_remap_all(struct fb_info *info);int fbcon_set_con2fb_map_ioctl(void __user *argp);int fbcon_get_con2fb_map_ioctl(void __user *argp);#elsestatic inline void fb_console_init(void) {}static inline void fb_console_exit(void) {}static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }static inline void fbcon_fb_unregistered(struct fb_info *info) {}static inline void fbcon_fb_unbind(struct fb_info *info) {}static inline void fbcon_suspended(struct fb_info *info) {}static inline void fbcon_resumed(struct fb_info *info) {}static inline int fbcon_mode_deleted(struct fb_info *info,				     struct fb_videomode *mode) { return 0; }static inline void fbcon_delete_modelist(struct list_head *head) {}static inline void fbcon_new_modelist(struct fb_info *info) {}static inline void fbcon_get_requirement(struct fb_info *info,					 struct fb_blit_caps *caps) {}static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}static inline int  fbcon_modechange_possible(struct fb_info *info,				struct fb_var_screeninfo *var) { return 0; }static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}static inline void fbcon_remap_all(struct fb_info *info) {}static inline int fbcon_set_con2fb_map_ioctl(void __user *argp) { return 0; }static inline int fbcon_get_con2fb_map_ioctl(void __user *argp) { return 0; }#endif #endif /* _VIDEO_FBCON_H */