Initial import

1 files changed, 264 insertions, 0 deletions

diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h
new file mode 100644
index 000000000..6bd2e0c7f
--- /dev/null
+++ b/drivers/video/console/fbcon.h
@@ -0,0 +1,264 @@
+/*
+ *  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/types.h>
+#include <linux/vt_buffer.h>
+#include <linux/vt_kern.h>
+
+#include <asm/io.h>
+
+#define FBCON_FLAGS_INIT         1
+#define FBCON_FLAGS_CURSOR_TIMER 2
+
+   /*
+    *    This is the interface between the low-level console driver and the
+    *    low-level frame buffer device
+    */
+
+struct display {
+    /* Filled in by the low-level console driver */
+    const u_char *fontdata;
+    int userfont;                   /* != 0 if fontdata kmalloc()ed */
+    u_short scrollmode;             /* Scroll Method */
+    u_short inverse;                /* != 0 text black on white as default */
+    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_ops {
+	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);
+	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 bottom_only);
+	void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
+		       int softback_lines, int fg, int bg);
+	int  (*update_start)(struct fb_info *info);
+	int  (*rotate_font)(struct fb_info *info, struct vc_data *vc);
+	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
+	struct timer_list cursor_timer; /* Cursor timer */
+	struct fb_cursor cursor_state;
+	struct display *p;
+        int    currcon;	                /* Current VC. */
+	int    cursor_flash;
+	int    cursor_reset;
+	int    blank_state;
+	int    graphics;
+	int    save_graphics; /* for debug enter/leave */
+	int    flags;
+	int    rotate;
+	int    cur_rotate;
+	char  *cursor_data;
+	u8    *fontbuffer;
+	u8    *fontdata;
+	u8    *cursor_src;
+	u32    cursor_size;
+	u32    fd_size;
+};
+    /*
+     *  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;
+}
+
+static inline int attr_col_ec(int shift, struct vc_data *vc,
+			      struct fb_info *info, int is_fg)
+{
+	int is_mono01;
+	int col;
+	int fg;
+	int bg;
+
+	if (!vc)
+		return 0;
+
+	if (vc->vc_can_do_color)
+		return is_fg ? attr_fgcol(shift,vc->vc_video_erase_char)
+			: attr_bgcol(shift,vc->vc_video_erase_char);
+
+	if (!info)
+		return 0;
+
+	col = mono_col(info);
+	is_mono01 = info->fix.visual == FB_VISUAL_MONO01;
+
+	if (attr_reverse(vc->vc_video_erase_char)) {
+		fg = is_mono01 ? col : 0;
+		bg = is_mono01 ? 0 : col;
+	}
+	else {
+		fg = is_mono01 ? 0 : col;
+		bg = is_mono01 ? col : 0;
+	}
+
+	return is_fg ? fg : bg;
+}
+
+#define attr_bgcol_ec(bgshift, vc, info) attr_col_ec(bgshift, vc, info, 0)
+#define attr_fgcol_ec(fgshift, vc, info) attr_col_ec(fgshift, vc, info, 1)
+
+/* Font */
+#define REFCOUNT(fd)	(((int *)(fd))[-1])
+#define FNTSIZE(fd)	(((int *)(fd))[-2])
+#define FNTCHARCNT(fd)	(((int *)(fd))[-3])
+#define FNTSUM(fd)	(((int *)(fd))[-4])
+#define FONT_EXTRA_WORDS 4
+
+    /*
+     *  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
+
+#ifdef CONFIG_FB_TILEBLITTING
+extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
+#endif
+extern void fbcon_set_bitops(struct fbcon_ops *ops);
+extern int  soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
+
+#define FBCON_ATTRIBUTE_UNDERLINE 1
+#define FBCON_ATTRIBUTE_REVERSE   2
+#define FBCON_ATTRIBUTE_BOLD      4
+
+static inline int real_y(struct 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_CONSOLE_ROTATION
+extern void fbcon_set_rotate(struct fbcon_ops *ops);
+#else
+#define fbcon_set_rotate(x) do {} while(0)
+#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
+
+#endif /* _VIDEO_FBCON_H */
+