integrator: enable Vpp and disable flash protection

This enables Vpp and disables the flash protection on the
Integrator when starting U-Boot. The integrator/AP has double
protection mechanisms: this one and the EBI protection bit
(patch earlier), the Integrator/CP has only one line of
protection in these registers.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/board/armltd/integrator/integrator.c b/board/armltd/integrator/integrator.c
index dd83ca5c036c35c20b861706c27e484a62e21e5f..a507c093aaac973ca25be29817f029d70affd06b 100644 (file)
--- a/board/armltd/integrator/integrator.c
+++ b/board/armltd/integrator/integrator.c
@@ -37,6 +37,7 @@
 #include <netdev.h>
 #include <asm/io.h>
 #include "arm-ebi.h"
+#include "integrator-sc.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -76,7 +77,19 @@ extern void cm_remap(void);
        cm_remap();     /* remaps writeable memory to 0x00000000 */
 #endif
 
+#ifdef CONFIG_ARCH_CINTEGRATOR
        /*
+        * Flash protection on the Integrator/CP is in a simple register
+        */
+       val = readl(CP_FLASHPROG);
+       val |= (CP_FLASHPROG_FLVPPEN | CP_FLASHPROG_FLWREN);
+       writel(val, CP_FLASHPROG);
+#else
+       /*
+        * The Integrator/AP has some special protection mechanisms
+        * for the external memories, first the External Bus Interface (EBI)
+        * then the system controller (SC).
+        *
         * The system comes up with the flash memory non-writable and
         * configuration locked. If we want U-Boot to be used for flash
         * access we cannot have the flash memory locked.
@@ -88,6 +101,13 @@ extern void cm_remap(void);
        writel(val, EBI_BASE + EBI_CSR1_REG);
        writel(0, EBI_BASE + EBI_LOCK_REG);
 
+       /*
+        * Set up the system controller to remove write protection from
+        * the flash memory and enable Vpp
+        */
+       writel(SC_CTRL_FLASHVPP | SC_CTRL_FLASHWP, SC_CTRLS);
+#endif
+
        icache_enable ();
 
        return 0;