/* *  linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 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/module.h>#include <linux/slab.h>#include <linux/string.h>#include <linux/fb.h>#include <linux/font.h>#include <linux/vt_kern.h>#include <linux/console.h>#include <asm/types.h>#include "fbcon.h"#include "fbcon_rotate.h" /* * Rotation 270 degrees */ static void ccw_update_attr(u8 *dst, u8 *src, int attribute,				  struct vc_data *vc){	int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;	int width = font_glyph_pitch(vc->vc_font.height);	int mod = vc->vc_font.height % 8;	u8 c, msk = ~(0xff << offset), msk1 = 0; 	if (mod)		msk <<= (8 - mod); 	if (offset > mod)		msk1 |= 0x01; 	for (i = 0; i < vc->vc_font.width; i++) {		for (j = 0; j < width; j++) {			c = *src; 			if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {				if (j == width - 1)					c |= msk; 				if (msk1 && j == width - 2)					c |= msk1;			} 			if (attribute & FBCON_ATTRIBUTE_BOLD && i)				*(dst - width) |= c; 			if (attribute & FBCON_ATTRIBUTE_REVERSE)				c = ~c;			src++;			*dst++ = c;		}	}}  static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,		     int sx, int dy, int dx, int height, int width){	struct fbcon_par *par = info->fbcon_par;	struct fb_copyarea area;	u32 vyres = GETVYRES(par->p, info); 	area.sx = sy * vc->vc_font.height;	area.sy = vyres - ((sx + width) * vc->vc_font.width);	area.dx = dy * vc->vc_font.height;	area.dy = vyres - ((dx + width) * vc->vc_font.width);	area.width = height * vc->vc_font.height;	area.height  = width * vc->vc_font.width; 	info->fbops->fb_copyarea(info, &area);} static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,		     int sx, int height, int width, int fg, int bg){	struct fbcon_par *par = info->fbcon_par;	struct fb_fillrect region;	u32 vyres = GETVYRES(par->p, info); 	region.color = bg;	region.dx = sy * vc->vc_font.height;	region.dy = vyres - ((sx + width) * vc->vc_font.width);	region.height = width * vc->vc_font.width;	region.width = height * vc->vc_font.height;	region.rop = ROP_COPY; 	info->fbops->fb_fillrect(info, &region);} static inline void ccw_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_par *par = info->fbcon_par;	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;	u32 idx = font_glyph_pitch(vc->vc_font.height);	u8 *src; 	while (cnt--) {		src = par->rotated.buf + (scr_readw(s--) & charmask) * cellsize; 		if (attr) {			ccw_update_attr(buf, src, attr, vc);			src = buf;		} 		if (likely(idx == 1))			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,						vc->vc_font.width);		else			fb_pad_aligned_buffer(dst, d_pitch, src, idx,					      vc->vc_font.width); 		dst += d_pitch * vc->vc_font.width;	} 	info->fbops->fb_imageblit(info, image);} static void ccw_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 fbcon_par *par = info->fbcon_par;	u32 width = font_glyph_pitch(vc->vc_font.height);	u32 cellsize = width * vc->vc_font.width;	u32 maxcnt = info->pixmap.size/cellsize;	u32 scan_align = info->pixmap.scan_align - 1;	u32 buf_align = info->pixmap.buf_align - 1;	u32 cnt, pitch, size;	u32 attribute = get_attribute(info, scr_readw(s));	u8 *dst, *buf = NULL;	u32 vyres = GETVYRES(par->p, info); 	if (!par->rotated.buf)		return; 	image.fg_color = fg;	image.bg_color = bg;	image.dx = yy * vc->vc_font.height;	image.dy = vyres - ((xx + count) * vc->vc_font.width);	image.width = 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.height = 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;		ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,				 width, cellsize, &image, buf, dst);		image.dy += image.height;		count -= cnt;		s -= 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 ccw_clear_margins(struct vc_data *vc, struct fb_info *info,			      int color, int bottom_only){	unsigned int cw = vc->vc_font.width;	unsigned int ch = vc->vc_font.height;	unsigned int rw = info->var.yres - (vc->vc_cols*cw);	unsigned int bh = info->var.xres - (vc->vc_rows*ch);	unsigned int bs = vc->vc_rows*ch;	struct fb_fillrect region; 	region.color = color;	region.rop = ROP_COPY; 	if ((int) rw > 0 && !bottom_only) {		region.dx = 0;		region.dy = info->var.yoffset;		region.height = rw;		region.width = info->var.xres_virtual;		info->fbops->fb_fillrect(info, &region);	} 	if ((int) bh > 0) {		region.dx = info->var.xoffset + bs;		region.dy = 0;                region.height = info->var.yres_virtual;                region.width = bh;		info->fbops->fb_fillrect(info, &region);	}} static void ccw_cursor(struct vc_data *vc, struct fb_info *info, bool enable,		       int fg, int bg){	struct fb_cursor cursor;	struct fbcon_par *par = info->fbcon_par;	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;	int w = font_glyph_pitch(vc->vc_font.height);	int c;	int y = real_y(par->p, vc->state.y);	int attribute, use_sw = vc->vc_cursor_type & CUR_SW;	int err = 1, dx, dy;	char *src;	u32 vyres = GETVYRES(par->p, info); 	if (!par->rotated.buf)		return; 	cursor.set = 0;  	c = scr_readw((u16 *) vc->vc_pos);	attribute = get_attribute(info, c);	src = par->rotated.buf + ((c & charmask) * (w * vc->vc_font.width)); 	if (par->cursor_state.image.data != src ||	    par->cursor_reset) {		par->cursor_state.image.data = src;		cursor.set |= FB_CUR_SETIMAGE;	} 	if (attribute) {		u8 *dst; 		dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC);		if (!dst)			return;		kfree(par->cursor_data);		par->cursor_data = dst;		ccw_update_attr(dst, src, attribute, vc);		src = dst;	} 	if (par->cursor_state.image.fg_color != fg ||	    par->cursor_state.image.bg_color != bg ||	    par->cursor_reset) {		par->cursor_state.image.fg_color = fg;		par->cursor_state.image.bg_color = bg;		cursor.set |= FB_CUR_SETCMAP;	} 	if (par->cursor_state.image.height != vc->vc_font.width ||	    par->cursor_state.image.width != vc->vc_font.height ||	    par->cursor_reset) {		par->cursor_state.image.height = vc->vc_font.width;		par->cursor_state.image.width = vc->vc_font.height;		cursor.set |= FB_CUR_SETSIZE;	} 	dx = y * vc->vc_font.height;	dy = vyres - ((vc->state.x + 1) * vc->vc_font.width); 	if (par->cursor_state.image.dx != dx ||	    par->cursor_state.image.dy != dy ||	    par->cursor_reset) {		par->cursor_state.image.dx = dx;		par->cursor_state.image.dy = dy;		cursor.set |= FB_CUR_SETPOS;	} 	if (par->cursor_state.hot.x || par->cursor_state.hot.y ||	    par->cursor_reset) {		par->cursor_state.hot.x = cursor.hot.y = 0;		cursor.set |= FB_CUR_SETHOT;	} 	if (cursor.set & FB_CUR_SETSIZE ||	    vc->vc_cursor_type != par->p->cursor_shape ||	    par->cursor_state.mask == NULL ||	    par->cursor_reset) {		unsigned char *tmp, *mask; 		tmp = kmalloc_array(vc->vc_font.height, vc_font_pitch(&vc->vc_font), GFP_ATOMIC);		if (!tmp)			return;		fbcon_fill_cursor_mask(par, vc, tmp); 		mask = kmalloc_array(vc->vc_font.width, w, GFP_ATOMIC);		if (!mask) {			kfree(tmp);			return;		}		font_glyph_rotate_270(tmp, vc->vc_font.width, vc->vc_font.height, mask);		kfree(tmp); 		kfree(par->cursor_state.mask);		par->cursor_state.mask = (const char *)mask; 		par->p->cursor_shape = vc->vc_cursor_type;		cursor.set |= FB_CUR_SETSHAPE;	} 	par->cursor_state.enable = enable && !use_sw; 	cursor.image.data = src;	cursor.image.fg_color = par->cursor_state.image.fg_color;	cursor.image.bg_color = par->cursor_state.image.bg_color;	cursor.image.dx = par->cursor_state.image.dx;	cursor.image.dy = par->cursor_state.image.dy;	cursor.image.height = par->cursor_state.image.height;	cursor.image.width = par->cursor_state.image.width;	cursor.hot.x = par->cursor_state.hot.x;	cursor.hot.y = par->cursor_state.hot.y;	cursor.mask = par->cursor_state.mask;	cursor.enable = par->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); 	par->cursor_reset = 0;} static int ccw_update_start(struct fb_info *info){	struct fbcon_par *par = info->fbcon_par;	u32 yoffset;	u32 vyres = GETVYRES(par->p, info);	int err; 	yoffset = (vyres - info->var.yres) - par->var.xoffset;	par->var.xoffset = par->var.yoffset;	par->var.yoffset = yoffset;	err = fb_pan_display(info, &par->var);	par->var.xoffset = info->var.xoffset;	par->var.yoffset = info->var.yoffset;	par->var.vmode = info->var.vmode;	return err;} static const struct fbcon_bitops ccw_fbcon_bitops = {	.bmove = ccw_bmove,	.clear = ccw_clear,	.putcs = ccw_putcs,	.clear_margins = ccw_clear_margins,	.cursor = ccw_cursor,	.update_start = ccw_update_start,	.rotate_font = fbcon_rotate_font,}; void fbcon_set_bitops_ccw(struct fbcon_par *par){	par->bitops = &ccw_fbcon_bitops;}