From 1dc26801a3ef15ea2d32387c725293ecfcb08efa Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 9 Nov 2011 06:16:37 +0000 Subject: [PATCH] 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 --- board/armltd/integrator/integrator.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/board/armltd/integrator/integrator.c b/board/armltd/integrator/integrator.c index dd83ca5c03..a507c093aa 100644 --- a/board/armltd/integrator/integrator.c +++ b/board/armltd/integrator/integrator.c @@ -37,6 +37,7 @@ #include #include #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; -- 2.39.5