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Commit 33ee8297 authored by Antonino A. Daplas's avatar Antonino A. Daplas Committed by Linus Torvalds
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[PATCH] fbcon: Console Rotation - Add support for 180-degree console rotation 



Add support for 180-degree (upside down) rotation of the console.  To
activate, boot with:

fbcon=rotate:2

Signed-off-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent dbcbfe1e

drivers/video/console/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ ifeq ($(CONFIG_FB_TILEBLITTING),y) 
obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += tileblit.o

endif

ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y)

obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += fbcon_rotate.o fbcon_cw.o

obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += fbcon_rotate.o fbcon_cw.o fbcon_ud.o

endif



obj-$(CONFIG_FB_STI)              += sticore.o font.o

drivers/video/console/fbcon_rotate.c

+3 −0
Original line number Diff line number Diff line
@@ -102,6 +102,9 @@ void fbcon_set_rotate(struct fbcon_ops *ops) 
	case FB_ROTATE_CW:

		fbcon_rotate_cw(ops);

		break;

	case FB_ROTATE_UD:

		fbcon_rotate_ud(ops);

		break;

	}

}

EXPORT_SYMBOL(fbcon_set_rotate);

drivers/video/console/fbcon_rotate.h

+1 −0
Original line number Diff line number Diff line
@@ -100,4 +100,5 @@ static inline void rotate_ccw(const char *in, char *out, u32 width, u32 height) 
}



extern void fbcon_rotate_cw(struct fbcon_ops *ops);

extern void fbcon_rotate_ud(struct fbcon_ops *ops);

#endif

drivers/video/console/fbcon_ud.c

0 → 100644
+454 −0
Original line number Diff line number Diff line 
/*

 *  linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 180 degrees

 *

 *      Copyright (C) 2005 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"

#include "fbcon_rotate.h"



/*

 * Rotation 180 degrees

 */



static inline void ud_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 = 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 ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,

		     int sx, int dy, int dx, int height, int width)

{

	struct display *p = &fb_display[vc->vc_num];

	struct fb_copyarea area;

	u32 vyres = GETVYRES(p->scrollmode, info);

	u32 vxres = GETVXRES(p->scrollmode, info);



	area.sy = vyres - ((sy + height) * vc->vc_font.height);

	area.sx = vxres - ((sx + width) * vc->vc_font.width);

	area.dy = vyres - ((dy + height) * vc->vc_font.height);

	area.dx = vxres - ((dx + width) * vc->vc_font.width);

	area.height = height * vc->vc_font.height;

	area.width  = width * vc->vc_font.width;



	info->fbops->fb_copyarea(info, &area);

}



static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,

		     int sx, int height, int width)

{

	struct display *p = &fb_display[vc->vc_num];

	struct fb_fillrect region;

	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;

	u32 vyres = GETVYRES(p->scrollmode, info);

	u32 vxres = GETVXRES(p->scrollmode, info);



	region.color = attr_bgcol_ec(bgshift,vc);

	region.dy = vyres - ((sy + height) * vc->vc_font.height);

	region.dx = vxres - ((sx + width) *  vc->vc_font.width);

	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 inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,

				    const u16 *s, u32 attr, u32 cnt,

				    u32 d_pitch, u32 s_pitch, u32 cellsize,

				    struct fb_image *image, u8 *buf, u8 *dst)

{

	struct fbcon_ops *ops = info->fbcon_par;

	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;

	u32 idx = vc->vc_font.width >> 3;

	u8 *src;



	while (cnt--) {

		src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;



		if (attr) {

			ud_update_attr(buf, src, attr, vc);

			src = buf;

		}



		if (likely(idx == 1))

			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,

						image->height);

		else

			fb_pad_aligned_buffer(dst, d_pitch, src, idx,

					      image->height);



		dst += s_pitch;

	}



	info->fbops->fb_imageblit(info, image);

}



static inline void ud_putcs_unaligned(struct vc_data *vc,

				      struct fb_info *info, const u16 *s,

				      u32 attr, u32 cnt, u32 d_pitch,

				      u32 s_pitch, u32 cellsize,

				      struct fb_image *image, u8 *buf,

				      u8 *dst)

{

	struct fbcon_ops *ops = info->fbcon_par;

	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;

	u32 shift_low = 0, mod = vc->vc_font.width % 8;

	u32 shift_high = 8;

	u32 idx = vc->vc_font.width >> 3;

	u8 *src;



	while (cnt--) {

		src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;



		if (attr) {

			ud_update_attr(buf, src, attr, vc);

			src = buf;

		}



		fb_pad_unaligned_buffer(dst, d_pitch, src, idx,

					image->height, shift_high,

					shift_low, mod);

		shift_low += mod;

		dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;

		shift_low &= 7;

		shift_high = 8 - shift_low;

	}



	info->fbops->fb_imageblit(info, image);



}



static void ud_putcs(struct vc_data *vc, struct fb_info *info,

		      const unsigned short *s, int count, int yy, int xx,

		      int fg, int bg)

{

	struct fb_image image;

	struct display *p = &fb_display[vc->vc_num];

	struct fbcon_ops *ops = info->fbcon_par;

	u32 width = (vc->vc_font.width + 7)/8;

	u32 cellsize = width * vc->vc_font.height;

	u32 maxcnt = info->pixmap.size/cellsize;

	u32 scan_align = info->pixmap.scan_align - 1;

	u32 buf_align = info->pixmap.buf_align - 1;

	u32 mod = vc->vc_font.width % 8, cnt, pitch, size;

	u32 attribute = get_attribute(info, scr_readw(s));

	u8 *dst, *buf = NULL;

	u32 vyres = GETVYRES(p->scrollmode, info);

	u32 vxres = GETVXRES(p->scrollmode, info);



	if (!ops->fontbuffer)

		return;



	image.fg_color = fg;

	image.bg_color = bg;

	image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);

	image.dx = vxres - ((xx + count) * vc->vc_font.width);

	image.height = vc->vc_font.height;

	image.depth = 1;



	if (attribute) {

		buf = kmalloc(cellsize, GFP_KERNEL);

		if (!buf)

			return;

	}



	s += count - 1;



	while (count) {

		if (count > maxcnt)

			cnt = maxcnt;

		else

			cnt = 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)

			ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,

					 width, cellsize, &image, buf, dst);

		else

			ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,

					   width, cellsize, &image,

					   buf, dst);



		image.dx += image.width;

		count -= cnt;

		s -= cnt;

		xx += 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 ud_clear_margins(struct vc_data *vc, struct fb_info *info,

			     int bottom_only)

{

	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);

	struct fb_fillrect region;

	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;



	region.color = attr_bgcol_ec(bgshift,vc);

	region.rop = ROP_COPY;



	if (rw && !bottom_only) {

		region.dy = 0;

		region.dx = info->var.xoffset;

		region.width  = rw;

		region.height = info->var.yres_virtual;

		info->fbops->fb_fillrect(info, &region);

	}



	if (bh) {

		region.dy = info->var.yoffset;

		region.dx = info->var.xoffset;

                region.height  = bh;

                region.width = info->var.xres;

		info->fbops->fb_fillrect(info, &region);

	}

}



static void ud_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);

	int err = 1, dx, dy;

	char *src;

	u32 vyres = GETVYRES(p->scrollmode, info);

	u32 vxres = GETVXRES(p->scrollmode, info);



	if (!ops->fontbuffer)

		return;



	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 = ops->fontbuffer + ((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;

		ud_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.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;

	}



	dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);

	dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);



	if (ops->cursor_state.image.dx != dx ||

	    ops->cursor_state.image.dy != dy ||

	    ops->cursor_reset) {

		ops->cursor_state.image.dx = dx;

		ops->cursor_state.image.dy = dy;

		cursor.set |= FB_CUR_SETPOS;

	}



	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 = cur_height * w;



		while (size--)

			mask[i++] = msk;



		size = (vc->vc_font.height - 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;



	if (info->fbops->fb_cursor)

		err = info->fbops->fb_cursor(info, &cursor);



	if (err)

		soft_cursor(info, &cursor);



	ops->cursor_reset = 0;

}



int ud_update_start(struct fb_info *info)

{

	struct fbcon_ops *ops = info->fbcon_par;

	struct display *p = &fb_display[ops->currcon];

	u32 xoffset, yoffset;

	u32 vyres = GETVYRES(p->scrollmode, info);

	u32 vxres = GETVXRES(p->scrollmode, info);

	int err;



	xoffset = (vxres - info->var.xres) - ops->var.xoffset;

	yoffset = (vyres - info->var.yres) - ops->var.yoffset;

	ops->var.xoffset = xoffset;

	ops->var.yoffset = yoffset;

	err = fb_pan_display(info, &ops->var);

	ops->var.xoffset = info->var.xoffset;

	ops->var.yoffset = info->var.yoffset;

	ops->var.vmode = info->var.vmode;

	return err;

}



void fbcon_rotate_ud(struct fbcon_ops *ops)

{

	ops->bmove = ud_bmove;

	ops->clear = ud_clear;

	ops->putcs = ud_putcs;

	ops->clear_margins = ud_clear_margins;

	ops->cursor = ud_cursor;

	ops->update_start = ud_update_start;

}

EXPORT_SYMBOL(fbcon_rotate_ud);



MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");

MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");

MODULE_LICENSE("GPL");