Checking width before setting DDR controller. SPD for DDR1 and DDR2 has
data width and primary sdram width. The latter one has different meaning
for DDR3.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Add support for 16-bit DDR bus. Also deal with system using 64- and 32-bit
DDR devices.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
If the bus width is 32-bit, burst chop should be disabled and burst length
should be 8. Read from SPD or other source to determine the width.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Added fsl_ddr_get_version() function to for DDR3 to poll DDRC IP version
(major, minor, errata) to determine if unique mode registers are available.
If true, always use unique mode registers. Dynamic ODT is enabled if needed.
The table is documented in doc/README.fsl-ddr. This function may also need
to be extend for future other platforms if such a feature exists.
Enable address parity and RCW by default for RDIMMs.
Change default output driver impedance from 34 ohm to 40ohm. Make it 34ohm for
quad-rank RDIMMs.
Use a formula to calculate rodt_on for timing_cfg_5.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Add fsl_ddr:ecc=on in hwconfig. If ECC is enabled in board configuration file,
ECC can be turned on/off by this switch. If this switch is omitted, it is ON by
default.
Updated hwconfig calls to use local buffer.
Syntax is
hwconfig=fsl_ddr:ecc=on
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
There are several users of the hwconfig APIs (8xxx DDR) before we have
the environment properly setup. This causes issues because of the
numerous ways the environment might be accessed because of the
non-volatile memory it might be stored in. Additionally the access
might be so early that memory isn't even properly setup for us.
Towards resolving these issues we provide versions of all the hwconfig
APIs that can be passed in a buffer to parse and leave it to the caller
to determine how to allocate and populate the buffer.
We use the _f naming convention for these new APIs even though they are
perfectly useable after relocation and the environment being ready.
We also now warn if the non-f APIs are called before the environment is
ready to allow users to address the issues.
Finally, we convert the 8xxx DDR code to utilize the new APIs to
hopefully address the issue once and for all. We have the 8xxx DDR code
create a buffer on the stack and populate it via getenv_f().
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>
Move the parsing of hwconfig to determine if to use spd into common code
so we can share it across all boards instead of duplicating it
everywhere.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Previous code presumes each DIMM has up to two rank (chip select). Newer
DDR controller supports up to four chip select on one DIMM.
Signed-off-by: York Sun <yorksun@freescale.com>
Verified on MPC8641HPCN with four DDR2 dimms. Each dimm has dual
rank with 512MB each rank.
Also check dimm size and rank size for memory controller interleaving
Signed-off-by: York Sun <yorksun@freescale.com>
Replace environmental variables memctl_intlv_ctl and ba_intlv_ctl with
hwconfig parameters. The syntax is
setenv hwconfig "fsl_ddr:ctlr_intlv=<mode>,bank_intlv=<mode>"
The mode values for memory controller interleaving are
cacheline
page
bank
superbank
The mode values for bank interleaving are
cs0_cs1
cs2_cs3
cs0_cs1_and_cs2_cs3
cs0_cs1_cs2_cs3
Signed-off-by: York Sun <yorksun@freescale.com>
As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.
Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>
2010-04-21 23:42:38 +02:00
Renamed from arch/ppc/cpu/mpc8xxx/ddr/options.c (Browse further)
