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.
Luigi 'Comio' Mantellini (3): New Bit-banged MII driver (MIIPHYBB) implementation with multi-bus support. Add bb_miiphy_init call before any ethernet bring-up code. Update all board to support new bbmiiphy driver (with multibus support)
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 | 4 + include/configs/ZPC1900.h | 4 + include/configs/ep8248.h | 4 + include/configs/ep82xxm.h | 4 + include/configs/gw8260.h | 4 + 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 + 29 files changed, 408 insertions(+), 106 deletions(-)