Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/video/fbcmap.c b/drivers/video/fbcmap.c
new file mode 100644
index 0000000..c51f8fb
--- /dev/null
+++ b/drivers/video/fbcmap.c
@@ -0,0 +1,337 @@
+/*
+ * linux/drivers/video/fbcmap.c -- Colormap handling for frame buffer devices
+ *
+ * Created 15 Jun 1997 by Geert Uytterhoeven
+ *
+ * 2001 - Documented with DocBook
+ * - Brad Douglas <brad@neruo.com>
+ *
+ * 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/string.h>
+#include <linux/module.h>
+#include <linux/tty.h>
+#include <linux/fb.h>
+#include <linux/slab.h>
+
+#include <asm/uaccess.h>
+
+static u16 red2[] = {
+ 0x0000, 0xaaaa
+};
+static u16 green2[] = {
+ 0x0000, 0xaaaa
+};
+static u16 blue2[] = {
+ 0x0000, 0xaaaa
+};
+
+static u16 red4[] = {
+ 0x0000, 0xaaaa, 0x5555, 0xffff
+};
+static u16 green4[] = {
+ 0x0000, 0xaaaa, 0x5555, 0xffff
+};
+static u16 blue4[] = {
+ 0x0000, 0xaaaa, 0x5555, 0xffff
+};
+
+static u16 red8[] = {
+ 0x0000, 0x0000, 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0xaaaa, 0xaaaa
+};
+static u16 green8[] = {
+ 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0x0000, 0x0000, 0x5555, 0xaaaa
+};
+static u16 blue8[] = {
+ 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa
+};
+
+static u16 red16[] = {
+ 0x0000, 0x0000, 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0xaaaa, 0xaaaa,
+ 0x5555, 0x5555, 0x5555, 0x5555, 0xffff, 0xffff, 0xffff, 0xffff
+};
+static u16 green16[] = {
+ 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0x0000, 0x0000, 0x5555, 0xaaaa,
+ 0x5555, 0x5555, 0xffff, 0xffff, 0x5555, 0x5555, 0xffff, 0xffff
+};
+static u16 blue16[] = {
+ 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa,
+ 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff
+};
+
+static struct fb_cmap default_2_colors = {
+ 0, 2, red2, green2, blue2, NULL
+};
+static struct fb_cmap default_8_colors = {
+ 0, 8, red8, green8, blue8, NULL
+};
+static struct fb_cmap default_4_colors = {
+ 0, 4, red4, green4, blue4, NULL
+};
+static struct fb_cmap default_16_colors = {
+ 0, 16, red16, green16, blue16, NULL
+};
+
+
+/**
+ * fb_alloc_cmap - allocate a colormap
+ * @cmap: frame buffer colormap structure
+ * @len: length of @cmap
+ * @transp: boolean, 1 if there is transparency, 0 otherwise
+ *
+ * Allocates memory for a colormap @cmap. @len is the
+ * number of entries in the palette.
+ *
+ * Returns -1 errno on error, or zero on success.
+ *
+ */
+
+int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp)
+{
+ int size = len*sizeof(u16);
+
+ if (cmap->len != len) {
+ fb_dealloc_cmap(cmap);
+ if (!len)
+ return 0;
+ if (!(cmap->red = kmalloc(size, GFP_ATOMIC)))
+ goto fail;
+ if (!(cmap->green = kmalloc(size, GFP_ATOMIC)))
+ goto fail;
+ if (!(cmap->blue = kmalloc(size, GFP_ATOMIC)))
+ goto fail;
+ if (transp) {
+ if (!(cmap->transp = kmalloc(size, GFP_ATOMIC)))
+ goto fail;
+ } else
+ cmap->transp = NULL;
+ }
+ cmap->start = 0;
+ cmap->len = len;
+ fb_copy_cmap(fb_default_cmap(len), cmap);
+ return 0;
+
+fail:
+ fb_dealloc_cmap(cmap);
+ return -1;
+}
+
+/**
+ * fb_dealloc_cmap - deallocate a colormap
+ * @cmap: frame buffer colormap structure
+ *
+ * Deallocates a colormap that was previously allocated with
+ * fb_alloc_cmap().
+ *
+ */
+
+void fb_dealloc_cmap(struct fb_cmap *cmap)
+{
+ kfree(cmap->red);
+ kfree(cmap->green);
+ kfree(cmap->blue);
+ kfree(cmap->transp);
+
+ cmap->red = cmap->green = cmap->blue = cmap->transp = NULL;
+ cmap->len = 0;
+}
+
+/**
+ * fb_copy_cmap - copy a colormap
+ * @from: frame buffer colormap structure
+ * @to: frame buffer colormap structure
+ *
+ * Copy contents of colormap from @from to @to.
+ */
+
+int fb_copy_cmap(struct fb_cmap *from, struct fb_cmap *to)
+{
+ int tooff = 0, fromoff = 0;
+ int size;
+
+ if (to->start > from->start)
+ fromoff = to->start - from->start;
+ else
+ tooff = from->start - to->start;
+ size = to->len - tooff;
+ if (size > (int) (from->len - fromoff))
+ size = from->len - fromoff;
+ if (size <= 0)
+ return -EINVAL;
+ size *= sizeof(u16);
+
+ memcpy(to->red+tooff, from->red+fromoff, size);
+ memcpy(to->green+tooff, from->green+fromoff, size);
+ memcpy(to->blue+tooff, from->blue+fromoff, size);
+ if (from->transp && to->transp)
+ memcpy(to->transp+tooff, from->transp+fromoff, size);
+ return 0;
+}
+
+int fb_cmap_to_user(struct fb_cmap *from, struct fb_cmap_user *to)
+{
+ int tooff = 0, fromoff = 0;
+ int size;
+
+ if (to->start > from->start)
+ fromoff = to->start - from->start;
+ else
+ tooff = from->start - to->start;
+ size = to->len - tooff;
+ if (size > (int) (from->len - fromoff))
+ size = from->len - fromoff;
+ if (size <= 0)
+ return -EINVAL;
+ size *= sizeof(u16);
+
+ if (copy_to_user(to->red+tooff, from->red+fromoff, size))
+ return -EFAULT;
+ if (copy_to_user(to->green+tooff, from->green+fromoff, size))
+ return -EFAULT;
+ if (copy_to_user(to->blue+tooff, from->blue+fromoff, size))
+ return -EFAULT;
+ if (from->transp && to->transp)
+ if (copy_to_user(to->transp+tooff, from->transp+fromoff, size))
+ return -EFAULT;
+ return 0;
+}
+
+/**
+ * fb_set_cmap - set the colormap
+ * @cmap: frame buffer colormap structure
+ * @info: frame buffer info structure
+ *
+ * Sets the colormap @cmap for a screen of device @info.
+ *
+ * Returns negative errno on error, or zero on success.
+ *
+ */
+
+int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *info)
+{
+ int i, start;
+ u16 *red, *green, *blue, *transp;
+ u_int hred, hgreen, hblue, htransp = 0xffff;
+
+ red = cmap->red;
+ green = cmap->green;
+ blue = cmap->blue;
+ transp = cmap->transp;
+ start = cmap->start;
+
+ if (start < 0 || !info->fbops->fb_setcolreg)
+ return -EINVAL;
+ for (i = 0; i < cmap->len; i++) {
+ hred = *red++;
+ hgreen = *green++;
+ hblue = *blue++;
+ if (transp)
+ htransp = *transp++;
+ if (info->fbops->fb_setcolreg(start++,
+ hred, hgreen, hblue, htransp,
+ info))
+ break;
+ }
+ return 0;
+}
+
+int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
+{
+ int i, start;
+ u16 __user *red, *green, *blue, *transp;
+ u_int hred, hgreen, hblue, htransp = 0xffff;
+
+ red = cmap->red;
+ green = cmap->green;
+ blue = cmap->blue;
+ transp = cmap->transp;
+ start = cmap->start;
+
+ if (start < 0 || !info->fbops->fb_setcolreg)
+ return -EINVAL;
+ for (i = 0; i < cmap->len; i++, red++, blue++, green++) {
+ if (get_user(hred, red) ||
+ get_user(hgreen, green) ||
+ get_user(hblue, blue) ||
+ (transp && get_user(htransp, transp)))
+ return -EFAULT;
+ if (info->fbops->fb_setcolreg(start++,
+ hred, hgreen, hblue, htransp,
+ info))
+ return 0;
+ if (transp)
+ transp++;
+ }
+ return 0;
+}
+
+/**
+ * fb_default_cmap - get default colormap
+ * @len: size of palette for a depth
+ *
+ * Gets the default colormap for a specific screen depth. @len
+ * is the size of the palette for a particular screen depth.
+ *
+ * Returns pointer to a frame buffer colormap structure.
+ *
+ */
+
+struct fb_cmap *fb_default_cmap(int len)
+{
+ if (len <= 2)
+ return &default_2_colors;
+ if (len <= 4)
+ return &default_4_colors;
+ if (len <= 8)
+ return &default_8_colors;
+ return &default_16_colors;
+}
+
+
+/**
+ * fb_invert_cmaps - invert all defaults colormaps
+ *
+ * Invert all default colormaps.
+ *
+ */
+
+void fb_invert_cmaps(void)
+{
+ u_int i;
+
+ for (i = 0; i < 2; i++) {
+ red2[i] = ~red2[i];
+ green2[i] = ~green2[i];
+ blue2[i] = ~blue2[i];
+ }
+ for (i = 0; i < 4; i++) {
+ red4[i] = ~red4[i];
+ green4[i] = ~green4[i];
+ blue4[i] = ~blue4[i];
+ }
+ for (i = 0; i < 8; i++) {
+ red8[i] = ~red8[i];
+ green8[i] = ~green8[i];
+ blue8[i] = ~blue8[i];
+ }
+ for (i = 0; i < 16; i++) {
+ red16[i] = ~red16[i];
+ green16[i] = ~green16[i];
+ blue16[i] = ~blue16[i];
+ }
+}
+
+
+ /*
+ * Visible symbols for modules
+ */
+
+EXPORT_SYMBOL(fb_alloc_cmap);
+EXPORT_SYMBOL(fb_dealloc_cmap);
+EXPORT_SYMBOL(fb_copy_cmap);
+EXPORT_SYMBOL(fb_set_cmap);
+EXPORT_SYMBOL(fb_default_cmap);
+EXPORT_SYMBOL(fb_invert_cmaps);