u-boot.git/drivers/ddr, branch v2018.05

SPDX: Convert all of our single license tags to Linux Kernel style

2018-05-07T13:34:12+00:00

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini

Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTR

2018-04-27T18:54:48+00:00

We have a large number of places where while we historically referenced
gd in the code we no longer do, as well as cases where the code added
that line "just in case" during development and never dropped it.

Signed-off-by: Tom Rini

Revert "drivers/ddr/fsl: Dual-license DDR driver"

2018-02-15T02:34:05+00:00

Upon further review, not all code authors are in favour of this change.
This reverts commit ee3556bcafbb05e59aabdc31368984e76acaabc4.

Signed-off-by: Tom Rini

drivers/ddr/fsl: Dual-license DDR driver

2018-02-09T16:36:40+00:00

To make this driver easier to be reused, dual-license DDR driver.

Signed-off-by: York Sun 
CC: Simon Glass 
CC: Tom Rini 
CC: Heinrich Schuchardt 
CC: Thomas Schaefer 
CC: Masahiro Yamada 
CC: Robert P. J. Day 
CC: Alexander Merkle 
CC: Joakim Tjernlund 
CC: Curt Brune 
CC: Valentin Longchamp 
CC: Wolfgang Denk 
CC: Anatolij Gustschin 
CC: Ira W. Snyder 
CC: Marek Vasut 
CC: Kyle Moffett 
CC: Sebastien Carlier 
CC: Stefan Roese 
CC: Peter Tyser 
CC: Paul Gortmaker 
CC: Peter Tyser 
CC: Jean-Christophe PLAGNIOL-VILLARD

drivers/ddr/fsl: Cleanup unused variable

2018-01-30T17:14:07+00:00

Variable "row_density" is no longer used. Drop it from DIMM structure.

Signed-off-by: York Sun

drivers/ddr/fsl: Modify binding registers to save time on data init

2018-01-30T17:14:07+00:00

DDR controllers always use binding register to determine the memory
space to perform data initialization. In case of controller interleaving,
the space is doubled, resulting twice long wait. It wasn't too bad until
the memory capacity increases. To reduce the wait time, reduce the
binding space to half and restore it after data initialization.
Three-way interleaving is no longer used and is removed.

Signed-off-by: York Sun

drivers/ddr/fsl: Add calculation of register control words

2018-01-30T17:14:07+00:00

DDR4 RDIMM has some information in SPD to be used to calculate the
control words for register chip. The rest can be found from JEDEC
spec DDR4RCD02.

Signed-off-by: York Sun

drivers/ddr/fsl: Add 3DS RDIMM support

2018-01-30T17:14:07+00:00

On top of RDIMM support, add new register calculation to support
3DS RDIMMs. Only symmetrical 3DS is supported at this time.

Signed-off-by: York Sun

drivers/ddr/fsl: Fix workaround for A009803

2018-01-30T17:14:06+00:00

Wrong field was masked in this workaround due to wrong endianness. The
impacted SoCs have big-endian.

Signed-off-by: York Sun

drivers/ddr/fsl: Fix DDR4 RDIMM support

2018-01-30T17:14:06+00:00

For DDR4, command/address delay in mode registers and parity latency
in timing config register are only needed for UDIMMs, but not RDIMMs.
Add additional register rcw_3 for DDR4 RDIMM. Fix mirrored bit for
dual rank RDIMMs. Set sdram_cfg_3[DIS_MRS_PAR] for RDIMMs. Fix
calculation of timing config registers. Use hexadecimal format for
printing RCW (register control word) registers.

Signed-off-by: York Sun