From: Anton Vorontsov Date: Wed, 8 Oct 2008 16:52:54 +0000 (+0400) Subject: mpc83xx: add ELBC NAND support for the MPC837XEMDS boards X-Git-Tag: v2009.01-rc1~142 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=b3379f3fd13969934c00097c05754e7a8990fd39;p=oweals%2Fu-boot.git mpc83xx: add ELBC NAND support for the MPC837XEMDS boards 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 It is due to hardware design and logic defect, that is the I/O[0:7] of NAND chip is connected to LAD[7:0], so when the NAND chip connected to nLCS3, you have to set up the OR3[BCTLD] = '1' for normal operation, otherwise it will have bus contention due to the pin 48/25 of U60 is enabled. Setup the OR3[BCTLD] = '1' , that meaning the LBCTL is not asserted upon access to the NAND chip, keep the default state. Acked-by: Dave Liu Signed-off-by: Kim Phillips --- diff --git a/include/configs/MPC837XEMDS.h b/include/configs/MPC837XEMDS.h index c3431ee4cc..1e46ce23c7 100644 --- a/include/configs/MPC837XEMDS.h +++ b/include/configs/MPC837XEMDS.h @@ -204,7 +204,7 @@ #endif /* CONFIG_SYS_MONITOR_LEN must be a multiple of CONFIG_ENV_SECT_SIZE */ -#define CONFIG_SYS_MONITOR_LEN (256 * 1024) /* Reserve 256 kB for Mon */ +#define CONFIG_SYS_MONITOR_LEN (384 * 1024) /* Reserve 384 kB for Mon */ #define CONFIG_SYS_MALLOC_LEN (512 * 1024) /* Reserved for malloc */ /* @@ -268,6 +268,12 @@ /* * NAND Flash on the Local Bus */ +#define CONFIG_CMD_NAND 1 +#define CONFIG_MTD_NAND_VERIFY_WRITE 1 +#define CONFIG_SYS_MAX_NAND_DEVICE 1 +#define NAND_MAX_CHIPS 1 +#define CONFIG_NAND_FSL_ELBC 1 + #define CONFIG_SYS_NAND_BASE 0xE0600000 /* 0xE0600000 */ #define CONFIG_SYS_BR3_PRELIM ( CONFIG_SYS_NAND_BASE \ | (2<