[U-Boot] [PATCH 0/4] make egiga common to kirkwood and orion5x

[Albert Aribaud]

Republishing the patchset as a submission as the RFC did not
meet any comment so far.

SHORT STORY

This patchset separates egiga from kirkwood then adds orion5x support
in egiga. It has been duly, and successfully, tested on an OpenRD-Client
after each of the four commits and on an EDMini V2 after the last commit.

LONG STORY

This is a set of four atomic commits.

the first commit separates the file renames from the content changes
so that the renaming remains visible in git at 100% similarity.

The second commit removes functional dependencies (calls to kirkwood
functions from egiga; these were RAM base and size functions, actually
accessible via the global gd variable, just like other drivers do).

The third commit deals with mostly cosmetic changes by removing any
"KIRKWOOD", "KW", "kirkwood" or "kw" from egiga symbols which are not
actually kirkwood-related, and renames kirkwood_egiga_initialize to
egiga_initialize in the egiga driver, in netdev.h and in cpu.c of the
kirkwood SoC support code.

These three commits together perform the separation of egiga from
kirkwood.

The last commit adds the actual orion5s support. Note that it contains
an important change to egiga: the addition of the 'volatile' qualifier
to members of the structs representing egiga registers and descriptors.

This was needed on orion5x, as without the volatile qualifiers, reads
and writes th these structs could happen in unexpected order; in
egiga_send() this caused the egiga DMA engine to get started before
the DMA TX descriptor was actually filled in, with the effect that
the actual sent packet was all zeroes. I cannot explain why this did
not happen on kirkwood, except that maybe the CPU speed difference made
it possible for the core to finish writing the descriptor before the DMA
engine could start.

All commits were tested on a kirkwood-based OpenRD Client for regression
avoidance; the last commit was also tested on an orion5x-based ED Mini V2
for functionality validation.

Albert Aribaud (4):
  ARM: Rename kirkwood_egiga driver to egiga
  egiga: Remove functional dependency on kirkwood
  egiga: remove references to kirkwood SoC
  egiga: add support for orion5x

 arch/arm/cpu/arm926ejs/kirkwood/cpu.c         |    4 +-
 arch/arm/cpu/arm926ejs/orion5x/cpu.c          |   18 +
 arch/arm/include/asm/arch-kirkwood/kirkwood.h |   10 +
 arch/arm/include/asm/arch-orion5x/orion5x.h   |    5 +
 board/LaCie/edminiv2/edminiv2.c               |   36 ++
 board/LaCie/edminiv2/edminiv2.h               |   41 ++
 drivers/net/Makefile                          |    2 +-
 drivers/net/egiga.c                           |  728 +++++++++++++++++++++++++
 drivers/net/egiga.h                           |  505 +++++++++++++++++
 drivers/net/kirkwood_egiga.c                  |  719 ------------------------
 drivers/net/kirkwood_egiga.h                  |  505 -----------------
 include/configs/edminiv2.h                    |   30 +-
 include/configs/guruplug.h                    |    4 +-
 include/configs/km_arm.h                      |    4 +-
 include/configs/mv88f6281gtw_ge.h             |    4 +-
 include/configs/openrd_base.h                 |    4 +-
 include/configs/rd6281a.h                     |    4 +-
 include/configs/sheevaplug.h                  |    4 +-
 include/netdev.h                              |    2 +-
 19 files changed, 1382 insertions(+), 1247 deletions(-)
 create mode 100644 board/LaCie/edminiv2/edminiv2.h
 create mode 100644 drivers/net/egiga.c
 create mode 100644 drivers/net/egiga.h
 delete mode 100644 drivers/net/kirkwood_egiga.c
 delete mode 100644 drivers/net/kirkwood_egiga.h