[PATCH v3 0/9] mips: Add Octeon DDR4 init code

[Stefan Roese]

This patch adds the DDR4 init code. It is ported from the 2013 Cavium /
Marvell U-Boot version with no functional change. This was done
intentionally, as this code is very large and complex and is known to
work on many boards "as-is". So any functional change might have
introduced (hidden) incompatibilities.

Please note that the code has undergone many hours (read many days) of
code cleanup and restructuring. Unfortunately its still not 100%
checkpatch clean, as some warnings and checks can practically not be
removed / addresses, like these here:

CHECK: Prefer kernel type 's8' over 'int8_t'
-> 's8' can't be used on MIPS platforms, as its a register macro

or:

WARNING: Too many leading tabs - consider code refactoring
+                                               while (xor != 0) {
-> I've restructured the code already and its very hard to remove all
   these "Too many leading tabs" warnings.

or other warnings / checks.

But compared to the original code in much better shape (checkpatch
wise). I would have liked to include a checkpatch summary in this cover-
letter, showing the "before" (original code) and "after" (this code)
numbers, but unfortunately currently running checkpatch on the really
big file (octeon3_lmc.c) leads to many false errors. I can only suspect
that checkpatch has an issue handling this big file because of its size.

This code is tested on the Octeon3 EBB7304 EVK and works without any
known issues with 1 or 2 DDR4 DIMM configurations (8 & 16 GiB).

Thanks,
Stefan

Changes in v3:
- Remove "https://spdx.org/licenses" line
- Move multiple comment blocks into one
- Remove "https://spdx.org/licenses" line
- Remove "https://spdx.org/licenses" line
- Remove inclusion of "common.h"
- Remove duplicate comment line
- Remove "test-only" comment (leftover after cleanup)
- Remove "https://spdx.org/licenses" line
- Remove inclusion of "common.h"
- Remove all internal defines that resulted in dead code, as they have
  never been changed via external config files or Kconfig. This results
  in a smaller (~13KiB of source code saved, > 450 lines removed) and
  much cleaner code base.
- Remove "https://spdx.org/licenses" line
- Remove "https://spdx.org/licenses" line
- Remove inclusion of "common.h"

Changes in v2:
- Some unsupported Octeon families removed (only Octeon 2 & 3 supported
  in general)
- Some unsupported Octeon families removed (only Octeon 2 & 3 supported
  in general)
- Use readq/writeq in cvmx_read64_uint64/cvmx_write64_uint64 instead of
  readl/writel
- Don't re-init after relocation
- Some unsupported Octeon families removed (only Octeon 2 & 3 supported
  in general)
- Only map 256MiB of RAM in U-Boot and print total size as well
- Add year to copyright line

Aaron Williams (6):
  mips: octeon: Add octeon-model.h header
  mips: octeon Add cvmx/cvmx-lmcx-defs.h header
  mips: octeon: Add octeon_ddr.h header
  ram: octeon: Add MIPS Octeon3 DDR4 support (part 1/3)
  ram: octeon: Add MIPS Octeon3 DDR4 support (part 2/3)
  ram: octeon: Add MIPS Octeon3 DDR4 support (part 3/3)

Stefan Roese (3):
  mips: octeon: dts: mrvl,cn73xx.dtsi: Add memory controller DT node
  mips: octeon: dram.c: Add RAM driver support
  mips: octeon: octeon_ebb7304: Add DDR4 support

 arch/mips/dts/mrvl,cn73xx.dtsi                |    17 +
 arch/mips/mach-octeon/dram.c                  |    72 +-
 .../include/mach/cvmx/cvmx-lmcx-defs.h        |  4574 +++++++
 .../mach-octeon/include/mach/octeon-model.h   |   313 +
 .../mach-octeon/include/mach/octeon_ddr.h     |   982 ++
 board/Marvell/octeon_ebb7304/board.c          |    25 +-
 board/Marvell/octeon_ebb7304/board_ddr.h      |   447 +
 configs/octeon_ebb7304_defconfig              |     3 +
 drivers/ram/Kconfig                           |     1 +
 drivers/ram/Makefile                          |     2 +
 drivers/ram/octeon/Kconfig                    |    17 +
 drivers/ram/octeon/Makefile                   |     8 +
 drivers/ram/octeon/dimm_spd_eeprom.c          |   407 +
 drivers/ram/octeon/octeon3_lmc.c              | 11030 ++++++++++++++++
 drivers/ram/octeon/octeon_ddr.c               |  2728 ++++
 include/configs/octeon_common.h               |    11 +-
 16 files changed, 20622 insertions(+), 15 deletions(-)
 create mode 100644 arch/mips/mach-octeon/include/mach/cvmx/cvmx-lmcx-defs.h
 create mode 100644 arch/mips/mach-octeon/include/mach/octeon-model.h
 create mode 100644 arch/mips/mach-octeon/include/mach/octeon_ddr.h
 create mode 100644 board/Marvell/octeon_ebb7304/board_ddr.h
 create mode 100644 drivers/ram/octeon/Kconfig
 create mode 100644 drivers/ram/octeon/Makefile
 create mode 100644 drivers/ram/octeon/dimm_spd_eeprom.c
 create mode 100644 drivers/ram/octeon/octeon3_lmc.c
 create mode 100644 drivers/ram/octeon/octeon_ddr.c

-- 
2.28.0