Changeset 2b1f860 in mainline for boot/genarch/ofw.c

Timestamp:

2008-12-06T23:35:32Z (16 years ago)

Author:

Pavel Rimsky <rimskyp@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

20eb5e4d

Parents:

49093a4

Message:

Initialize the color palette for the 8-bit color depth on sparc64 framebuffers.

File:

• boot/genarch/ofw.c (modified) (1 diff)

boot/genarch/ofw.c

@@ -374 +374 @@
 }
 
+/**
+ * Sets up the palette for the 8-bit color depth configuration so that the
+ * 3:2:3 color scheme can be used. Checks that setting the palette makes sense
+ * (appropriate nodes exist in the OBP tree and the color depth is not greater
+ * than 8). 
+ *
+ * @return      true if the palette has been set, false otherwise
+ */
+int setup_palette(void)
+{
+        char device_name[BUF_SIZE];
+        
+        /* resolve alias */
+        if (ofw_get_property(ofw_aliases, "screen", device_name,
+                sizeof(device_name)) <= 0)
+                return false;
+
+        /* for depth greater than 8 it makes no sense to set up the palette */
+        uint32_t depth;
+        phandle device = ofw_find_device(device_name);
+        if (device == -1)
+                return false;
+        if (ofw_get_property(device, "depth", &depth, sizeof(uint32_t)) <= 0)
+                return false;
+        if (depth != 8)
+                return false;
+        
+        /* required in order to be able to make a method call */
+        ihandle screen = ofw_open(device_name);
+        if (screen == -1)
+                return false;
+
+        /* setup the palette so that the 3:2:3 scheme is usable */
+        unsigned int i;
+        for (i = 0; i < 256; i++)
+                if (ofw_call("call-method", 6, 1, NULL, "color!", screen,
+                        i,
+                        i << 5,
+                        (i >> 3) << 6,
+                        (i >> 5) << 5) != 0); 
+        return true;
+}
 
 void ofw_quiesce(void)