CS0 was not allowed to be empty by u-boot driver in the past to simplify
the driver. This may be inconvenient for some debugging. This patch lifts
the restrictions. Controller interleaving still requires CS0 populated.
Signed-off-by: York Sun <yorksun@freescale.com>
Add/update registers for DDR4, including DQ mappings. Allow raw timing
method used for all controllers. Update mode_9 register to 0x500 for
improved stability. Check DDR controller version number individually
in case a SoC has multiple DDR controllers of different versions.
Increase read-write turnaround for DDR4 high speeds.
Signed-off-by: York Sun <yorksun@freescale.com>
The driver was written using old DDR3 spec which only covers low speeds.
The value would be suboptimal for higher speeds. Fix both timing according
to latest DDR3 spec, remove tCKE as an config option.
Signed-off-by: York Sun <yorksun@freescale.com>
JEDEC spec allows DRAM vendors to use prime DQ for write leveling. This
is not an issue unless some DQ pins are not connected. If a platform uses
regular DIMMs but with reduced DDR ECC pins, the prime DQ may end up on
those floating pins for the second rank. The workaround is to use a known
good chip select for this purpose.
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>
Some DDR related structures present in fsl_ddr_dimm_params.h, fsl_ddr_sdram.h, ddr_spd.h
has various parameters with embedded acronyms capitalized that trigger the CamelCase
warning in checkpatch.pl
Convert those variable names to smallcase naming convention and modify all files
which are using these structures with modified structures.
Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
On selected platforms, x4 DDR devices can be supported. Using x4 devices may
lower the performance, but generally they are available for higher density.
Tested on MT36JSF2G72PZ-1G9E1 RDIMM.
Signed-off-by: York Sun <yorksun@freescale.com>
This patch adds the ability for the FSL DDR interactive debugger to
automatically run the sequence of commands stored in the ddr_interactive
environment variable. Commands are separated using ';'.
ddr_interactive=compute; edit c0 d0 dimmparms caslat_X 0x3FC0; go
Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Add copy command which allows copying of DIMM/controller settings.
This saves tedious retyping of parameters for each identical DIMM
or controller.
Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This fix allows the name of the stage to be specifed after the
controler and DIMM is specified. Prior to this fix, if the
data stage name is not the first entry on the command line,
the operation is applied to all controller and DIMMs.
Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Move the FSL DDR prompt command parsing to a separate function
so that it can be reused.
Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
DDRC ver 4.7 adds DDR_SLOW bit in sdram_cfg_2 register. This bit needs to be
set for speed lower than 1250MT/s.
CDR1 and CDR2 are control driver registers. ODT termination valueis for
IOs are defined. Starting from DDRC 4.7, the decoding of ODT for IOs is
000 -> Termsel off
001 -> 120 Ohm
010 -> 180 Ohm
011 -> 75 Ohm
100 -> 110 Ohm
101 -> 60 Ohm
110 -> 70 Ohm
111 -> 47 Ohm
Add two write leveling registers. Each QDS now has its own write leveling
start value. In case of zero value, the value of QDS0 will be used. These
values are board-specific and are set in board files.
Extend DDR register timing_cfg_1 to have 4 bits for each field.
DDR control driver registers and write leveling registers are added to
interactive debugging for easy access.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Add one more argument to call function readline_into_buffer().
Fix print SPD format for negative values.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
When the DDR3 speed goes higher, we need to utilize fine offset
from SPD.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Fix:
interactive.c: In function 'fsl_ddr_interactive':
interactive.c:1357:15: warning: variable 'len' set but not used [-Wunused-but-set-variable]
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Interactive DDR debugging provides a user interface to view and modify SPD,
DIMM parameters, board options and DDR controller registers before DDR is
initialized. With this feature, developers can fine-tune DDR for board
bringup and other debugging without frequently having to reprogram the flash.
To enable this feature, define CONFIG_FSL_DDR_INTERACTIVE in board header
file and set an environment variable to activate it. Syntax:
setenv ddr_interactive on
After reset, U-boot prompts before initializing DDR controllers
FSL DDR>
The available commands are
print print SPD and intermediate computed data
reset reboot machine
recompute reload SPD and options to default and recompute regs
edit modify spd, parameter, or option
compute recompute registers from current next_step to end
next_step shows current next_step
help this message
go program the memory controller and continue with u-boot
The first command should be "compute", which reads data from DIMM SPDs and
board options, performs the calculation then stops before setting DDR
controller. A user can use "print" and "edit" commands to view and modify
anything. "Go" picks up from current step with any modification and
compltes the calculation then enables the DDR controller to continue u-boot.
"Recompute" does it over from fresh reading.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
York Sun
Simon Glass
Priyanka Jain
Wolfgang Denk
James Yang
Kumar Gala