From 1fcf77c87ad659a92e1dcfb883388cb43baeaab6 Mon Sep 17 00:00:00 2001 From: Andy Fleming Date: Sun, 4 Jan 2015 17:36:02 +0800 Subject: [PATCH] net/fsl: Add mEMAC MDIO support to XGMAC MDIO The Freescale mEMAC supports operating at 10/100/1000/10G, and its associated MDIO controller is likewise capable of operating both Clause 22 and Clause 45 MDIO buses. It is nearly identical to the MDIO controller on the XGMAC, so we just modify that driver. Portions of this driver developed by: Sandeep Singh Roy Zang Signed-off-by: Andy Fleming Signed-off-by: Shaohui Xie Signed-off-by: David S. Miller --- drivers/net/ethernet/freescale/Kconfig | 3 +- drivers/net/ethernet/freescale/xgmac_mdio.c | 64 +++++++++++++++++---- 2 files changed, 55 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig index 270308315d43..ba84c4a9ce32 100644 --- a/drivers/net/ethernet/freescale/Kconfig +++ b/drivers/net/ethernet/freescale/Kconfig @@ -69,7 +69,8 @@ config FSL_XGMAC_MDIO select PHYLIB select OF_MDIO ---help--- - This driver supports the MDIO bus on the Fman 10G Ethernet MACs. + This driver supports the MDIO bus on the Fman 10G Ethernet MACs, and + on the FMan mEMAC (which supports both Clauses 22 and 45) config UCC_GETH tristate "Freescale QE Gigabit Ethernet" diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c index a35244586a63..e0fc3d1115ea 100644 --- a/drivers/net/ethernet/freescale/xgmac_mdio.c +++ b/drivers/net/ethernet/freescale/xgmac_mdio.c @@ -32,6 +32,7 @@ struct tgec_mdio_controller { __be32 mdio_addr; /* MDIO address */ } __packed; +#define MDIO_STAT_ENC BIT(6) #define MDIO_STAT_CLKDIV(x) (((x>>1) & 0xff) << 8) #define MDIO_STAT_BSY (1 << 0) #define MDIO_STAT_RD_ER (1 << 1) @@ -91,20 +92,40 @@ static int xgmac_wait_until_done(struct device *dev, static int xgmac_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value) { struct tgec_mdio_controller __iomem *regs = bus->priv; - uint16_t dev_addr = regnum >> 16; + uint16_t dev_addr; + u32 mdio_ctl, mdio_stat; int ret; - /* Set the port and dev addr */ - out_be32(®s->mdio_ctl, - MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr)); + mdio_stat = in_be32(®s->mdio_stat); + if (regnum & MII_ADDR_C45) { + /* Clause 45 (ie 10G) */ + dev_addr = (regnum >> 16) & 0x1f; + mdio_stat |= MDIO_STAT_ENC; + } else { + /* Clause 22 (ie 1G) */ + dev_addr = regnum & 0x1f; + mdio_stat &= ~MDIO_STAT_ENC; + } - /* Set the register address */ - out_be32(®s->mdio_addr, regnum & 0xffff); + out_be32(®s->mdio_stat, mdio_stat); ret = xgmac_wait_until_free(&bus->dev, regs); if (ret) return ret; + /* Set the port and dev addr */ + mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr); + out_be32(®s->mdio_ctl, mdio_ctl); + + /* Set the register address */ + if (regnum & MII_ADDR_C45) { + out_be32(®s->mdio_addr, regnum & 0xffff); + + ret = xgmac_wait_until_free(&bus->dev, regs); + if (ret) + return ret; + } + /* Write the value to the register */ out_be32(®s->mdio_data, MDIO_DATA(value)); @@ -123,21 +144,39 @@ static int xgmac_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 val static int xgmac_mdio_read(struct mii_bus *bus, int phy_id, int regnum) { struct tgec_mdio_controller __iomem *regs = bus->priv; - uint16_t dev_addr = regnum >> 16; + uint16_t dev_addr; + uint32_t mdio_stat; uint32_t mdio_ctl; uint16_t value; int ret; + mdio_stat = in_be32(®s->mdio_stat); + if (regnum & MII_ADDR_C45) { + dev_addr = (regnum >> 16) & 0x1f; + mdio_stat |= MDIO_STAT_ENC; + } else { + dev_addr = regnum & 0x1f; + mdio_stat = ~MDIO_STAT_ENC; + } + + out_be32(®s->mdio_stat, mdio_stat); + + ret = xgmac_wait_until_free(&bus->dev, regs); + if (ret) + return ret; + /* Set the Port and Device Addrs */ mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr); out_be32(®s->mdio_ctl, mdio_ctl); /* Set the register address */ - out_be32(®s->mdio_addr, regnum & 0xffff); + if (regnum & MII_ADDR_C45) { + out_be32(®s->mdio_addr, regnum & 0xffff); - ret = xgmac_wait_until_free(&bus->dev, regs); - if (ret) - return ret; + ret = xgmac_wait_until_free(&bus->dev, regs); + if (ret) + return ret; + } /* Initiate the read */ out_be32(®s->mdio_ctl, mdio_ctl | MDIO_CTL_READ); @@ -224,6 +263,9 @@ static struct of_device_id xgmac_mdio_match[] = { { .compatible = "fsl,fman-xmdio", }, + { + .compatible = "fsl,fman-memac-mdio", + }, {}, }; MODULE_DEVICE_TABLE(of, xgmac_mdio_match); -- 2.20.1