[U-Boot] [PATCH] mpc83xx: add ELBC NAND support for the MPC837XEMDS boards

[Anton Vorontsov]

Though NAND chip is replaceable on the MPC837XE-MDS boards, the
current settings don't work with the default chip on the board.
Nevertheless Freescale's U-Boot sets the option register correctly,
so I just dumped the register from the working u-boot. My guess is
that the old settings were applicable for some pilot boards, not
found in the production.

This patch also enables FSL ELBC driver so that we could access
the NAND storage in the u-boot.

The NAND support costs about 45KB, so the u-boot no longer fits
into two 128KB NOR flash sectors, thus we also have to adjust
environment location: add another 128KB to the monitor length.

Signed-off-by: Anton Vorontsov <avorontsov at ru.mvista.com>
---
 include/configs/MPC837XEMDS.h |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/include/configs/MPC837XEMDS.h b/include/configs/MPC837XEMDS.h
index adf7c8c..d78aa60 100644
--- a/include/configs/MPC837XEMDS.h
+++ b/include/configs/MPC837XEMDS.h
@@ -204,7 +204,7 @@
 #endif
 
 /* CFG_MONITOR_LEN must be a multiple of CONFIG_ENV_SECT_SIZE */
-#define CFG_MONITOR_LEN		(256 * 1024) /* Reserve 256 kB for Mon */
+#define CFG_MONITOR_LEN		(384 * 1024) /* Reserve 384 kB for Mon */
 #define CFG_MALLOC_LEN		(512 * 1024) /* Reserved for malloc */
 
 /*
@@ -267,6 +267,12 @@
 /*
  * NAND Flash on the Local Bus
  */
+#define CONFIG_CMD_NAND		1
+#define CONFIG_MTD_NAND_VERIFY_WRITE	1
+#define CFG_MAX_NAND_DEVICE	1
+#define NAND_MAX_CHIPS		1
+#define CONFIG_NAND_FSL_ELBC 	1
+
 #define CFG_NAND_BASE		0xE0600000	/* 0xE0600000 */
 #define CFG_BR3_PRELIM		( CFG_NAND_BASE \
 				| (2<<BR_DECC_SHIFT)	/* Use HW ECC */ \
@@ -274,13 +280,14 @@
 				| BR_MS_FCM		/* MSEL = FCM */ \
 				| BR_V )		/* valid */
 #define CFG_OR3_PRELIM		( 0xFFFF8000		/* length 32K */ \
-				| OR_FCM_CSCT \
+				| OR_FCM_BCTLD \
 				| OR_FCM_CST \
 				| OR_FCM_CHT \
 				| OR_FCM_SCY_1 \
+				| OR_FCM_RST \
 				| OR_FCM_TRLX \
 				| OR_FCM_EHTR )
-				/* 0xFFFF8396 */
+				/* 0xFFFF919E */
 
 #define CFG_LBLAWBAR3_PRELIM	CFG_NAND_BASE
 #define CFG_LBLAWAR3_PRELIM	0x8000000E	/* 32KB  */
-- 
1.5.6.3