Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / video / console / fbcon_rotate.c

diff --git a/kernel/drivers/video/console/fbcon_rotate.c b/kernel/drivers/video/console/fbcon_rotate.c
new file mode 100644 (file)
index 0000000..db6528f
--- /dev/null
+++ b/kernel/drivers/video/console/fbcon_rotate.c
@@ -0,0 +1,116 @@
+/*
+ *  linux/drivers/video/console/fbcon_rotate.c -- Software Rotation
+ *
+ *      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/vt_kern.h>
+#include <linux/console.h>
+#include <asm/types.h>
+#include "fbcon.h"
+#include "fbcon_rotate.h"
+
+static int fbcon_rotate_font(struct fb_info *info, struct vc_data *vc)
+{
+       struct fbcon_ops *ops = info->fbcon_par;
+       int len, err = 0;
+       int s_cellsize, d_cellsize, i;
+       const u8 *src;
+       u8 *dst;
+
+       if (vc->vc_font.data == ops->fontdata &&
+           ops->p->con_rotate == ops->cur_rotate)
+               goto finished;
+
+       src = ops->fontdata = vc->vc_font.data;
+       ops->cur_rotate = ops->p->con_rotate;
+       len = (!ops->p->userfont) ? 256 : FNTCHARCNT(src);
+       s_cellsize = ((vc->vc_font.width + 7)/8) *
+               vc->vc_font.height;
+       d_cellsize = s_cellsize;
+
+       if (ops->rotate == FB_ROTATE_CW ||
+           ops->rotate == FB_ROTATE_CCW)
+               d_cellsize = ((vc->vc_font.height + 7)/8) *
+                       vc->vc_font.width;
+
+       if (info->fbops->fb_sync)
+               info->fbops->fb_sync(info);
+
+       if (ops->fd_size < d_cellsize * len) {
+               dst = kmalloc(d_cellsize * len, GFP_KERNEL);
+
+               if (dst == NULL) {
+                       err = -ENOMEM;
+                       goto finished;
+               }
+
+               ops->fd_size = d_cellsize * len;
+               kfree(ops->fontbuffer);
+               ops->fontbuffer = dst;
+       }
+
+       dst = ops->fontbuffer;
+       memset(dst, 0, ops->fd_size);
+
+       switch (ops->rotate) {
+       case FB_ROTATE_UD:
+               for (i = len; i--; ) {
+                       rotate_ud(src, dst, vc->vc_font.width,
+                                 vc->vc_font.height);
+
+                       src += s_cellsize;
+                       dst += d_cellsize;
+               }
+               break;
+       case FB_ROTATE_CW:
+               for (i = len; i--; ) {
+                       rotate_cw(src, dst, vc->vc_font.width,
+                                 vc->vc_font.height);
+                       src += s_cellsize;
+                       dst += d_cellsize;
+               }
+               break;
+       case FB_ROTATE_CCW:
+               for (i = len; i--; ) {
+                       rotate_ccw(src, dst, vc->vc_font.width,
+                                  vc->vc_font.height);
+                       src += s_cellsize;
+                       dst += d_cellsize;
+               }
+               break;
+       }
+
+finished:
+       return err;
+}
+
+void fbcon_set_rotate(struct fbcon_ops *ops)
+{
+       ops->rotate_font = fbcon_rotate_font;
+
+       switch(ops->rotate) {
+       case FB_ROTATE_CW:
+               fbcon_rotate_cw(ops);
+               break;
+       case FB_ROTATE_UD:
+               fbcon_rotate_ud(ops);
+               break;
+       case FB_ROTATE_CCW:
+               fbcon_rotate_ccw(ops);
+               break;
+       }
+}
+EXPORT_SYMBOL(fbcon_set_rotate);
+
+MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
+MODULE_DESCRIPTION("Console Rotation Support");
+MODULE_LICENSE("GPL");