1 files changed, 405 insertions, 0 deletions

diff --git a/drivers/video/console/bitblit.c b/drivers/video/console/bitblit.c
new file mode 100644
index 000000000000..b28a4b0e395e
--- /dev/null
+++ b/drivers/video/console/bitblit.c
@@ -0,0 +1,405 @@
+/*
+ *  linux/drivers/video/console/bitblit.c -- BitBlitting Operation
+ *
+ *  Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
+ *
+ *      Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
+ *
+ *  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.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+#include <asm/types.h>
+#include "fbcon.h"
+
+/*
+ * Accelerated handlers.
+ */
+#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) == 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;
+}
+
+static inline void update_attr(u8 *dst, u8 *src, int attribute,
+			       struct vc_data *vc)
+{
+	int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
+	int width = (vc->vc_font.width + 7) >> 3;
+	unsigned int cellsize = vc->vc_font.height * width;
+	u8 c;
+
+	offset = cellsize - (offset * width);
+	for (i = 0; i < cellsize; i++) {
+		c = src[i];
+		if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
+			c = 0xff;
+		if (attribute & FBCON_ATTRIBUTE_BOLD)
+			c |= c >> 1;
+		if (attribute & FBCON_ATTRIBUTE_REVERSE)
+			c = ~c;
+		dst[i] = c;
+	}
+}
+
+static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
+		      int sx, int dy, int dx, int height, int width)
+{
+	struct fb_copyarea area;
+
+	area.sx = sx * vc->vc_font.width;
+	area.sy = sy * vc->vc_font.height;
+	area.dx = dx * vc->vc_font.width;
+	area.dy = dy * vc->vc_font.height;
+	area.height = height * vc->vc_font.height;
+	area.width = width * vc->vc_font.width;
+
+	info->fbops->fb_copyarea(info, &area);
+}
+
+static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
+		      int sx, int height, int width)
+{
+	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
+	struct fb_fillrect region;
+
+	region.color = attr_bgcol_ec(bgshift, vc);
+	region.dx = sx * vc->vc_font.width;
+	region.dy = sy * vc->vc_font.height;
+	region.width = width * vc->vc_font.width;
+	region.height = height * vc->vc_font.height;
+	region.rop = ROP_COPY;
+
+	info->fbops->fb_fillrect(info, &region);
+}
+
+static void bit_putcs(struct vc_data *vc, struct fb_info *info,
+		      const unsigned short *s, int count, int yy, int xx,
+		      int fg, int bg)
+{
+	void (*move_unaligned)(struct fb_info *info, struct fb_pixmap *buf,
+			       u8 *dst, u32 d_pitch, u8 *src, u32 idx,
+			       u32 height, u32 shift_high, u32 shift_low,
+			       u32 mod);
+	void (*move_aligned)(struct fb_info *info, struct fb_pixmap *buf,
+			     u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
+			     u32 height);
+	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+	unsigned int width = (vc->vc_font.width + 7) >> 3;
+	unsigned int cellsize = vc->vc_font.height * width;
+	unsigned int maxcnt = info->pixmap.size/cellsize;
+	unsigned int scan_align = info->pixmap.scan_align - 1;
+	unsigned int buf_align = info->pixmap.buf_align - 1;
+	unsigned int shift_low = 0, mod = vc->vc_font.width % 8;
+	unsigned int shift_high = 8, pitch, cnt, size, k;
+	unsigned int idx = vc->vc_font.width >> 3;
+	unsigned int attribute = get_attribute(info, scr_readw(s));
+	struct fb_image image;
+	u8 *src, *dst, *buf = NULL;
+
+	if (attribute) {
+		buf = kmalloc(cellsize, GFP_KERNEL);
+		if (!buf)
+			return;
+	}
+
+	image.fg_color = fg;
+	image.bg_color = bg;
+
+	image.dx = xx * vc->vc_font.width;
+	image.dy = yy * vc->vc_font.height;
+	image.height = vc->vc_font.height;
+	image.depth = 1;
+
+	if (info->pixmap.outbuf && info->pixmap.inbuf) {
+		move_aligned = fb_iomove_buf_aligned;
+		move_unaligned = fb_iomove_buf_unaligned;
+	} else {
+		move_aligned = fb_sysmove_buf_aligned;
+		move_unaligned = fb_sysmove_buf_unaligned;
+	}
+	while (count) {
+		if (count > maxcnt)
+			cnt = k = maxcnt;
+		else
+			cnt = k = count;
+
+		image.width = vc->vc_font.width * cnt;
+		pitch = ((image.width + 7) >> 3) + scan_align;
+		pitch &= ~scan_align;
+		size = pitch * image.height + buf_align;
+		size &= ~buf_align;
+		dst = fb_get_buffer_offset(info, &info->pixmap, size);
+		image.data = dst;
+		if (mod) {
+			while (k--) {
+				src = vc->vc_font.data + (scr_readw(s++)&
+							  charmask)*cellsize;
+
+				if (attribute) {
+					update_attr(buf, src, attribute, vc);
+					src = buf;
+				}
+
+				move_unaligned(info, &info->pixmap, dst, pitch,
+					       src, idx, image.height,
+					       shift_high, shift_low, mod);
+				shift_low += mod;
+				dst += (shift_low >= 8) ? width : width - 1;
+				shift_low &= 7;
+				shift_high = 8 - shift_low;
+			}
+		} else {
+			while (k--) {
+				src = vc->vc_font.data + (scr_readw(s++)&
+							  charmask)*cellsize;
+
+				if (attribute) {
+					update_attr(buf, src, attribute, vc);
+					src = buf;
+				}
+
+				move_aligned(info, &info->pixmap, dst, pitch,
+					     src, idx, image.height);
+				dst += width;
+			}
+		}
+		info->fbops->fb_imageblit(info, &image);
+		image.dx += cnt * vc->vc_font.width;
+		count -= cnt;
+	}
+
+	/* buf is always NULL except when in monochrome mode, so in this case
+	   it's a gain to check buf against NULL even though kfree() handles
+	   NULL pointers just fine */
+	if (unlikely(buf))
+		kfree(buf);
+}
+
+static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
+			      int bottom_only)
+{
+	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
+	unsigned int cw = vc->vc_font.width;
+	unsigned int ch = vc->vc_font.height;
+	unsigned int rw = info->var.xres - (vc->vc_cols*cw);
+	unsigned int bh = info->var.yres - (vc->vc_rows*ch);
+	unsigned int rs = info->var.xres - rw;
+	unsigned int bs = info->var.yres - bh;
+	struct fb_fillrect region;
+
+	region.color = attr_bgcol_ec(bgshift, vc);
+	region.rop = ROP_COPY;
+
+	if (rw && !bottom_only) {
+		region.dx = info->var.xoffset + rs;
+		region.dy = 0;
+		region.width = rw;
+		region.height = info->var.yres_virtual;
+		info->fbops->fb_fillrect(info, &region);
+	}
+
+	if (bh) {
+		region.dx = info->var.xoffset;
+		region.dy = info->var.yoffset + bs;
+		region.width = rs;
+		region.height = bh;
+		info->fbops->fb_fillrect(info, &region);
+	}
+}
+
+static void bit_cursor(struct vc_data *vc, struct fb_info *info,
+		       struct display *p, int mode, int softback_lines, int fg, int bg)
+{
+	struct fb_cursor cursor;
+	struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
+	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+	int w = (vc->vc_font.width + 7) >> 3, c;
+	int y = real_y(p, vc->vc_y);
+	int attribute, use_sw = (vc->vc_cursor_type & 0x10);
+	char *src;
+
+	cursor.set = 0;
+
+	if (softback_lines) {
+		if (y + softback_lines >= vc->vc_rows) {
+			mode = CM_ERASE;
+			ops->cursor_flash = 0;
+			return;
+		} else
+			y += softback_lines;
+	}
+
+ 	c = scr_readw((u16 *) vc->vc_pos);
+	attribute = get_attribute(info, c);
+	src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
+
+	if (ops->cursor_state.image.data != src ||
+	    ops->cursor_reset) {
+	    ops->cursor_state.image.data = src;
+	    cursor.set |= FB_CUR_SETIMAGE;
+	}
+
+	if (attribute) {
+		u8 *dst;
+
+		dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
+		if (!dst)
+			return;
+		kfree(ops->cursor_data);
+		ops->cursor_data = dst;
+		update_attr(dst, src, attribute, vc);
+		src = dst;
+	}
+
+	if (ops->cursor_state.image.fg_color != fg ||
+	    ops->cursor_state.image.bg_color != bg ||
+	    ops->cursor_reset) {
+		ops->cursor_state.image.fg_color = fg;
+		ops->cursor_state.image.bg_color = bg;
+		cursor.set |= FB_CUR_SETCMAP;
+	}
+
+	if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->vc_x)) ||
+	    (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
+	    ops->cursor_reset) {
+		ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_x;
+		ops->cursor_state.image.dy = vc->vc_font.height * y;
+		cursor.set |= FB_CUR_SETPOS;
+	}
+
+	if (ops->cursor_state.image.height != vc->vc_font.height ||
+	    ops->cursor_state.image.width != vc->vc_font.width ||
+	    ops->cursor_reset) {
+		ops->cursor_state.image.height = vc->vc_font.height;
+		ops->cursor_state.image.width = vc->vc_font.width;
+		cursor.set |= FB_CUR_SETSIZE;
+	}
+
+	if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
+	    ops->cursor_reset) {
+		ops->cursor_state.hot.x = cursor.hot.y = 0;
+		cursor.set |= FB_CUR_SETHOT;
+	}
+
+	if (cursor.set & FB_CUR_SETSIZE ||
+	    vc->vc_cursor_type != p->cursor_shape ||
+	    ops->cursor_state.mask == NULL ||
+	    ops->cursor_reset) {
+		char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
+		int cur_height, size, i = 0;
+		u8 msk = 0xff;
+
+		if (!mask)
+			return;
+
+		kfree(ops->cursor_state.mask);
+		ops->cursor_state.mask = mask;
+
+		p->cursor_shape = vc->vc_cursor_type;
+		cursor.set |= FB_CUR_SETSHAPE;
+
+		switch (p->cursor_shape & CUR_HWMASK) {
+		case CUR_NONE:
+			cur_height = 0;
+			break;
+		case CUR_UNDERLINE:
+			cur_height = (vc->vc_font.height < 10) ? 1 : 2;
+			break;
+		case CUR_LOWER_THIRD:
+			cur_height = vc->vc_font.height/3;
+			break;
+		case CUR_LOWER_HALF:
+			cur_height = vc->vc_font.height >> 1;
+			break;
+		case CUR_TWO_THIRDS:
+			cur_height = (vc->vc_font.height << 1)/3;
+			break;
+		case CUR_BLOCK:
+		default:
+			cur_height = vc->vc_font.height;
+			break;
+		}
+		size = (vc->vc_font.height - cur_height) * w;
+		while (size--)
+			mask[i++] = ~msk;
+		size = cur_height * w;
+		while (size--)
+			mask[i++] = msk;
+	}
+
+	switch (mode) {
+	case CM_ERASE:
+		ops->cursor_state.enable = 0;
+		break;
+	case CM_DRAW:
+	case CM_MOVE:
+	default:
+		ops->cursor_state.enable = (use_sw) ? 0 : 1;
+		break;
+	}
+
+	cursor.image.data = src;
+	cursor.image.fg_color = ops->cursor_state.image.fg_color;
+	cursor.image.bg_color = ops->cursor_state.image.bg_color;
+	cursor.image.dx = ops->cursor_state.image.dx;
+	cursor.image.dy = ops->cursor_state.image.dy;
+	cursor.image.height = ops->cursor_state.image.height;
+	cursor.image.width = ops->cursor_state.image.width;
+	cursor.hot.x = ops->cursor_state.hot.x;
+	cursor.hot.y = ops->cursor_state.hot.y;
+	cursor.mask = ops->cursor_state.mask;
+	cursor.enable = ops->cursor_state.enable;
+	cursor.image.depth = 1;
+	cursor.rop = ROP_XOR;
+
+	info->fbops->fb_cursor(info, &cursor);
+
+	ops->cursor_reset = 0;
+}
+
+void fbcon_set_bitops(struct fbcon_ops *ops)
+{
+	ops->bmove = bit_bmove;
+	ops->clear = bit_clear;
+	ops->putcs = bit_putcs;
+	ops->clear_margins = bit_clear_margins;
+	ops->cursor = bit_cursor;
+}
+
+EXPORT_SYMBOL(fbcon_set_bitops);
+
+MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
+MODULE_DESCRIPTION("Bit Blitting Operation");
+MODULE_LICENSE("GPL");
+