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| author | Linus Walleij <linus.walleij@linaro.org> | 2011-11-09 06:16:37 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-11-10 15:27:22 +0100 |
| commit | 1dc26801a3ef15ea2d32387c725293ecfcb08efa (patch) | |
| tree | c93cad728b437675d3e4f06fc8400d7c24022416 /board/armltd | |
| parent | 0a20e534e9a8a0ef1376e1fe81f426d343fe0ca2 (diff) | |
| download | u-boot-imx-1dc26801a3ef15ea2d32387c725293ecfcb08efa.zip u-boot-imx-1dc26801a3ef15ea2d32387c725293ecfcb08efa.tar.gz u-boot-imx-1dc26801a3ef15ea2d32387c725293ecfcb08efa.tar.bz2 | |
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>
Diffstat (limited to 'board/armltd')
| -rw-r--r-- | board/armltd/integrator/integrator.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/board/armltd/integrator/integrator.c b/board/armltd/integrator/integrator.c index dd83ca5..a507c09 100644 --- 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; |