diff options
Diffstat (limited to 'drivers/net/gianfar_mii.c')
| -rw-r--r-- | drivers/net/gianfar_mii.c | 55 |
1 files changed, 44 insertions, 11 deletions
diff --git a/drivers/net/gianfar_mii.c b/drivers/net/gianfar_mii.c index bcc6b82f4a33..5dd34a1a7b89 100644 --- a/drivers/net/gianfar_mii.c +++ b/drivers/net/gianfar_mii.c @@ -43,13 +43,18 @@ #include "gianfar.h" #include "gianfar_mii.h" -/* Write value to the PHY at mii_id at register regnum, - * on the bus, waiting until the write is done before returning. - * All PHY configuration is done through the TSEC1 MIIM regs */ -int gfar_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) +/* + * Write value to the PHY at mii_id at register regnum, + * on the bus attached to the local interface, which may be different from the + * generic mdio bus (tied to a single interface), waiting until the write is + * done before returning. This is helpful in programming interfaces like + * the TBI which control interfaces like onchip SERDES and are always tied to + * the local mdio pins, which may not be the same as system mdio bus, used for + * controlling the external PHYs, for example. + */ +int gfar_local_mdio_write(struct gfar_mii *regs, int mii_id, + int regnum, u16 value) { - struct gfar_mii __iomem *regs = (void __iomem *)bus->priv; - /* Set the PHY address and the register address we want to write */ gfar_write(®s->miimadd, (mii_id << 8) | regnum); @@ -63,12 +68,19 @@ int gfar_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) return 0; } -/* Read the bus for PHY at addr mii_id, register regnum, and - * return the value. Clears miimcom first. All PHY - * configuration has to be done through the TSEC1 MIIM regs */ -int gfar_mdio_read(struct mii_bus *bus, int mii_id, int regnum) +/* + * Read the bus for PHY at addr mii_id, register regnum, and + * return the value. Clears miimcom first. All PHY operation + * done on the bus attached to the local interface, + * which may be different from the generic mdio bus + * This is helpful in programming interfaces like + * the TBI which, inturn, control interfaces like onchip SERDES + * and are always tied to the local mdio pins, which may not be the + * same as system mdio bus, used for controlling the external PHYs, for eg. + */ +int gfar_local_mdio_read(struct gfar_mii *regs, int mii_id, int regnum) + { - struct gfar_mii __iomem *regs = (void __iomem *)bus->priv; u16 value; /* Set the PHY address and the register address we want to read */ @@ -88,6 +100,27 @@ int gfar_mdio_read(struct mii_bus *bus, int mii_id, int regnum) return value; } +/* Write value to the PHY at mii_id at register regnum, + * on the bus, waiting until the write is done before returning. + * All PHY configuration is done through the TSEC1 MIIM regs */ +int gfar_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) +{ + struct gfar_mii __iomem *regs = (void __iomem *)bus->priv; + + /* Write to the local MII regs */ + return(gfar_local_mdio_write(regs, mii_id, regnum, value)); +} + +/* Read the bus for PHY at addr mii_id, register regnum, and + * return the value. Clears miimcom first. All PHY + * configuration has to be done through the TSEC1 MIIM regs */ +int gfar_mdio_read(struct mii_bus *bus, int mii_id, int regnum) +{ + struct gfar_mii __iomem *regs = (void __iomem *)bus->priv; + + /* Read the local MII regs */ + return(gfar_local_mdio_read(regs, mii_id, regnum)); +} /* Reset the MIIM registers, and wait for the bus to free */ int gfar_mdio_reset(struct mii_bus *bus) |