[U-Boot] [PATCH 0/3 v5] New MIIPHYBB implementation with multi-bus support

[Luigi 'Comio' Mantellini]

This patch rewrites the miiphybb ( Bit-banged MII bus driver ) in order to
support an arbitrary number of mii buses. This feature is useful when your
board uses different mii buses for different phys and all (or a part) of these
buses are implemented via bit-banging mode.

The driver requires that the following macros should be defined into the board
configuration file:

CONFIG_BITBANGMII       - Enable the miiphybb driver
CONFIG_BITBANGMII_MULTI - Enable the multi bus support

If the CONFIG_BITBANGMII_MULTI is not defined, the board's config file needs
to define at least the following macros:

MII_INIT      - Generic code to enable the MII bus (optional)
MDIO_DECLARE  - Declaration needed to access to the MDIO pin (optional)
MDIO_ACTIVE   - Activate the MDIO pin as out pin
MDIO_TRISTATE - Activate the MDIO pin as input/tristate pin
MDIO_READ     - Read the MDIO pin
MDIO(v)       - Write v on the MDIO pin
MDC_DECLARE   - Declaration needed to access to the MDC pin (optional)
MDC(v)        - Write v on the MDC pin

The previous macros make the driver compatible with the previous version
(that didn't support the multi-bus).

When the CONFIG_BITBANGMII_MULTI is also defined, the board code needs to fill
the bb_miiphy_buses[] array with a record for each required bus and declare
the bb_miiphy_buses_num variable with the number of mii buses.
The record (struct bb_miiphy_bus) has the following fields/callbacks (see
miiphy.h for details):

char name[]            - The symbolic name that must be equal to the MII bus
                        registered name
int (*init)()          - Initialization function called at startup time (just
                        before the Ethernet initialization)
int (*mdio_active)()   - Activate the MDIO pin as output
int (*mdio_tristate)() - Activate the MDIO pin as input/tristate pin
int (*set_mdio)()      - Write the MDIO pin
int (*get_mdio)()      - Read the MDIO pin
int (*set_mdc)()       - Write the MDC pin
int (*delay)()         - Delay function
void *priv             - Private data used by board specific code

The board code will look like:

struct bb_miiphy_bus bb_miiphy_buses[] = {
 { .name = "miibus#1", .init = b1_init, .mdio_active = b1_mdio_active, ... },
 { .name = "miibus#2", .init = b2_init, .mdio_active = b2_mdio_active, ... },
 ...
};
int bb_miiphy_buses_num = sizeof(bb_miiphy_buses) /
                         sizeof(bb_miiphy_buses[0]);

Patch Changelog:

v1 -- First (broken) release
v2 -- Fix some typos and disable callbacks pointers relacation (if
     CONFIG_RELOC_FIXUP_WORKS is not defined)
v3 -- Do not relocate NULL pointers
v4 -- Code Cleanup.
v5 -- Fix typos and cleanup config files

Luigi 'Comio' Mantellini (3):
  This patch rewrites the miiphybb ( Bit-banged MII bus driver ) in
    order to support an arbitrary number of mii buses. This feature is
    useful when your board uses different mii buses for different phys
    and all (or a part) of these buses are implemented via bit-banging
    mode.
  Add bb_miiphy_init call before any ethernet bring-up code.
  Update all board to support new bbmiiphy driver (with multibus
    support)

 doc/README.bitbangMII        |   56 +++++++
 drivers/net/phy/miiphybb.c   |  346 +++++++++++++++++++++++++++++-------------
 include/configs/ISPAN.h      |    4 +
 include/configs/MPC8260ADS.h |    3 +
 include/configs/MPC8266ADS.h |    4 +
 include/configs/MPC8560ADS.h |    4 +
 include/configs/Rattler.h    |    4 +
 include/configs/SBC8540.h    |    4 +
 include/configs/TQM8272.h    |    3 +
 include/configs/VoVPN-GW.h   |    5 +
 include/configs/ZPC1900.h    |    4 +
 include/configs/ep8248.h     |    1 +
 include/configs/ep82xxm.h    |    1 +
 include/configs/gw8260.h     |    5 +
 include/configs/hymod.h      |   12 ++
 include/configs/muas3001.h   |    4 +
 include/configs/ppmc8260.h   |    4 +
 include/configs/sacsng.h     |    4 +
 include/configs/sbc8260.h    |    4 +
 include/configs/sbc8560.h    |    4 +
 include/miiphy.h             |   25 +++-
 lib_arm/board.c              |    7 +
 lib_avr32/board.c            |    7 +
 lib_blackfin/board.c         |    7 +
 lib_i386/board.c             |    9 +-
 lib_m68k/board.c             |    7 +
 lib_mips/board.c             |    7 +
 lib_ppc/board.c              |    7 +
 lib_sh/board.c               |    7 +
 lib_sparc/board.c            |    7 +
 30 files changed, 460 insertions(+), 106 deletions(-)
 create mode 100644 doc/README.bitbangMII