Erratum A-009663 workaround requires to set DDR_INTERVAL[BSTOPRE] to 0
before setting DDR_SDRAM_CFG[MEM_EN] and set DDR_INTERVAL[BSTOPRE]
to the desired value after DDR initialization has completed.

When DDR controller is configured to operate in auto-precharge
mode(DDR_INTERVAL[BSTOPRE]=0), this workaround is not needed.
Signed-off-by: NShengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: NYork Sun <york.sun@nxp.com>

In a number of places we had wordings of the GPL (or LGPL in a few
cases) license text that were split in such a way that it wasn't caught
previously.  Convert all of these to the correct SPDX-License-Identifier
tag.
Signed-off-by: NTom Rini <trini@konsulko.com>

DDR4 has different RTT value and code according to JEDEC spec. Update
the macros and options .
Signed-off-by: NYork Sun <yorksun@freescale.com>

SR_IE(Self-refresh interrupt enable) is needed for
Hardware Based Self-Refresh. Make it configurable and let
board code handle the rest.
Signed-off-by: NJoakim Tjernlund <joakim.tjernlund@transmode.se>
Reviewed-by: NYork Sun <yorksun@freescale.com>

The LS2085AQDS is an evaluatoin platform that supports the LS2085A
family SoCs. This patch add basic support of the platform.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NPrabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: NBhupesh Sharma <bhupesh.sharma@freescale.com>

This erratum only applies to general purpose DDR controllers in LS2.
It shouldn't be applied to DP-DDR controller. Check DDRC versoin number
before applying workaround.
Signed-off-by: NYork Sun <yorksun@freescale.com>

With the introducing of generic board and ARM-based cores, current
deep sleep framework doesn't work anymore.
This patch will convert the current framework to adapt this change.
Basically it does:
1. Converts all the Freescale's DDR driver to support deep sleep.
2. Added basic framework support for ARM-based and PPC-based
cores separately.
Signed-off-by: NTang Yuantian <Yuantian.Tang@freescale.com>
Reviewed-by: NYork 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: NYork Sun <yorksun@freescale.com>

U-boot has been initializing DDR for the main memory. The presumption
is the memory stays as a big continuous block, either linear or
interleaved. This change is to support putting some DDR controllers
to separated space without counting into main memory. The standalone
memory controller could use different number of DIMM slots.
Signed-off-by: NYork 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: NYork Sun <yorksun@freescale.com>

When T104x soc wakes up from deep sleep, control is passed to the
primary core that starts executing uboot. After re-initialized some
IP blocks, like DDRC, kernel will take responsibility to continue
to restore environment it leaves before.
Signed-off-by: NTang Yuantian <Yuantian.Tang@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>

Mostly reusing DDR3 driver, this patch adds DDR4 SPD handling, register
calculation and programming.
Signed-off-by: NYork Sun <yorksun@freescale.com>

Freescale LayerScape SoCs support controller interleaving on 256 byte size.
This interleaving is mandoratory.
Signed-off-by: NYork 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: NYork 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: NPriyanka Jain <Priyanka.Jain@freescale.com>

JEDEC spec requires the clocks to be stable before deasserting reset
signal for RDIMMs. Clocks start when any chip select is enabled and
clock control register is set. This patch also adds the interface to
toggle memory reset signal if needed by the boards.
Signed-off-by: NYork Sun <yorksun@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: NYork Sun <yorksun@freescale.com>

When ECC is enabled, DDR controller needs to initialize the data and ecc.
The wait time can be calcuated with total memory size, bus width, bus speed
and interleaving mode. If it went wrong, it is bettert to timeout than
waiting for D_INIT to clear, where it probably hangs.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NAndy Fleming <afleming@freescale.com>

Fix handling quad-rank DIMMs in a system with two DIMM slots and first
slot supports both dual-rank DIMM and quad-rank DIMM.

For systems with quad-rank DIMM and double dual-rank DIMMs, cs_config
registers need to be enabled to maintain proper ODT operation. The
inactive CS should have bnds registers cleared.

Fix the turnaround timing for systems with all chip-selects enabled. This
wasn't an issue before because DDR was running lower than 1600MT/s with
this interleaving mode.

Fix DDR address calculation. It wasn't an issue until we have multiple
controllers with each more than 4GB and interleaving is disabled.

It also fixes the message of DDR: 2 GiB (DDR3, 64-bit, CL=0.5, ECC off)
when debugging DDR and first DDR controller is disabled. With the fix,
the first enabled controller information will be displayed.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NAndy 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: NYork Sun <yorksun@freescale.com>
Signed-off-by: NAndy Fleming <afleming@freescale.com>

Restructure DDR interleaving option to support 3 and 4 DDR controllers
for 2-, 3- and 4-way interleaving.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NAndy Fleming <afleming@freescale.com>

Currently, for NAND boot for the P1010/4RDB we hard code the DDR
configuration. We can still dynamically set the DDR bus width in
the nand spl so the P1010/4RDB boards can boot from the same
u-boot image
Signed-off-by: NMatthew McClintock <msm@freescale.com>
Signed-off-by: NAndy Fleming <afleming@freescale.com>

DDR2 has different ODT table and values. Adding table according to Samsung
application note.

Fix additive latency calculation to avoid interger underflow.

Also converted typedef dynamic_odt_t to struct dynamic_odt.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Check second DIMM slot in case the first one is empty.
Honor DQS enable option for SDRAM mode register.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Add this option to allow boards to override the default read-to-write
turnaround time for better performance.
Signed-off-by: NYork Sun <yorksun@freescale.com>

Add support for 16-bit DDR bus. Also deal with system using 64- and 32-bit
DDR devices.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Signed-off-by: NZhao Chenhui <b35336@freescale.com>
Acked-by: NLi Yang <leoli@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Signed-off-by: NPoonam Aggrwal <poonam.aggrwal@freescale.com>
Cc: York Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Remove declerations of fsl_ddr_set_memctl_regs in board files with and
place it into a common header.

Based on patch from Poonam Aggrwal.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Workaround for the following errata:
DDR111 - MCKE signal may not function correctly at assertion of HRESET
DDR134 - The automatic CAS-to-Preamble feature of the DDR controller can
         calibrate to incorrect values

These two workarounds must be implemented together because they touch
common registers.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Extend board specific parameters to include cpo, write leveling override
Extend write leveling sample to 0xf
Adding rcw overrid for quad-rank RDIMMs
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Erratum DDR-A003 requires workaround to correctly set RCW10 for registered DIMM.
Also adding polling after enabling DDR controller to ensure completion.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar 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: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

This patch exposes more registers which can be used by the DDR drivers or
interactive debugging. U-boot doesn't use all the registers in DDRC.
When advanced tuning is required, writing to those registers is needed.

Add writing to cdr1, cdr2, err_disable, err_int_en and debug registers
Add options to override rcw, address parity to RDIMMs.
Use array for debug registers.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

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: NKumar Gala <galak@kernel.crashing.org>

Correct initdram to use phys_size_t to represent the size of
dram; instead of changing this all over the place, and correcting
all the other random errors I've noticed, create a
common initdram that is used by all non-corenet 85xx parts.  Most
of the initdram() functions were identical, with 2 common differences:

1) DDR tlbs for the fixed_sdram case were set up in initdram() on
some boards, and were part of the tlb_table on others.  I have
changed them all over to the initdram() method - we shouldn't
be accessing dram before this point so they don't need to be
done sooner, and this seems cleaner.

2) Parts that require the DDR11 erratum workaround had different
implementations - I have adopted the version from the Freescale
errata document.  It also looks like some of the versions were
buggy, and, depending on timing, could have resulted in the
DDR controller being disabled.  This seems bad.

The xpedite boards had a common/fsl_8xxx_ddr.c; with this
change only the 517 board uses this so I have moved the ddr code
into that board's directory in xpedite517x.c
Signed-off-by: NBecky Bruce <beckyb@kernel.crashing.org>
Tested-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

800, 900, 1000, 1200MT/s data rate parameters are added for fixed sdram
setting. SPD based parameters and fixed parameters can be toggled by hwconfig.
To use fixed parameters,

hwconfig=fsl_ddr:sdram=fixed

To use SPD parameters,

hwconfig=fsl_ddr:ctlr_intlv=cacheline,bank_intlv=cs0_cs1
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

For 85xx silicon which supports address hashing, it can be activated by
hwconfig.
Signed-off-by: NYork Sun <yorksun@freescale.com>

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: NYork Sun <yorksun@freescale.com>

add the macro definition for Rtt_Nom termination value for DDR3
Signed-off-by: NDave Liu <daveliu@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>