DDR-ODT require cfg_dram_type switch set properly as per DDR type.
T1040RDB, T1042RDB boards have DDR3L type DDR, so cfg_dram_type
should be set to OFF for DDR3L
Update t104xrdb/README for switch setting
Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
Add support of 2 stage NAND, SD, SPI boot loader using SPL framework.
here, PBL initialise the internal SRAM and copy SPL(160KB). This further
initialise DDR using SPD and environment and copy u-boot(768 KB) from NAND to DDR.
Finally SPL transer control to u-boot.
Initialise/create followings required for SPL framework
- Add spl.c which defines board_init_f, board_init_r
- update tlb and ddr accordingly
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
Update following DDR related settings for T1040RDB, T1042RDB_PI
-Correct number of chip selects to two as t1040 supports
two Chip selects.
-Update board_specific_parameters udimm structure with settings
derived via calibration.
-Update ddr_raw_timing sructure corresponding to DIMM.
-Set ODT to off. Typically on FSL board, ODT is set to 75 ohm,
but on T104xRDB, on setting this , DDR instability is observed.
Board-level debugging is in progress.
Verified the updated settings to be working fine with dual-ranked
Micron, MT18KSF51272AZ-1G6 DIMM at data rate 1600MT/s.
Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Freescale DDR driver has been used for mpc83xx, mpc85xx, mpc86xx SoCs.
The similar DDR controllers will be used for ARM-based SoCs.
Signed-off-by: York Sun <yorksun@freescale.com>
