diff options
| author | Eric Benard <eric@eukrea.com> | 2012-01-12 06:10:28 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-01-13 04:05:28 (GMT) |
| commit | 8d82f219c2d476811cd3157a39c7b5c1f045ebc3 (patch) | |
| tree | 32bda05590b8799574c89d2f3bdc22ea47973cb5 /drivers/net/ethernet | |
| parent | 25cecd7e355bf90b8fea039bd06947bb3234e77d (diff) | |
| download | linux-8d82f219c2d476811cd3157a39c7b5c1f045ebc3.tar.xz | |
net: fsl: fec: handle 10Mbps speed in RMII mode
when the link is 10 Mbps and the mode is RMII, it's necessary
to set FRCONT to 1 in MIIGSK_CFGR to divide the RMII source
clock by 10 in order to support 10 Mbps operations.
Signed-off-by: Eric Bénard <eric@eukrea.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/freescale/fec.c | 9 | ||||
| -rw-r--r-- | drivers/net/ethernet/freescale/fec.h | 4 |
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c index 236cc89..7b25e9c 100644 --- a/drivers/net/ethernet/freescale/fec.c +++ b/drivers/net/ethernet/freescale/fec.c @@ -476,6 +476,7 @@ fec_restart(struct net_device *ndev, int duplex) } else { #ifdef FEC_MIIGSK_ENR if (id_entry->driver_data & FEC_QUIRK_USE_GASKET) { + u32 cfgr; /* disable the gasket and wait */ writel(0, fep->hwp + FEC_MIIGSK_ENR); while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) @@ -486,9 +487,11 @@ fec_restart(struct net_device *ndev, int duplex) * RMII, 50 MHz, no loopback, no echo * MII, 25 MHz, no loopback, no echo */ - writel((fep->phy_interface == PHY_INTERFACE_MODE_RMII) ? - 1 : 0, fep->hwp + FEC_MIIGSK_CFGR); - + cfgr = (fep->phy_interface == PHY_INTERFACE_MODE_RMII) + ? BM_MIIGSK_CFGR_RMII : BM_MIIGSK_CFGR_MII; + if (fep->phy_dev && fep->phy_dev->speed == SPEED_10) + cfgr |= BM_MIIGSK_CFGR_FRCONT_10M; + writel(cfgr, fep->hwp + FEC_MIIGSK_CFGR); /* re-enable the gasket */ writel(2, fep->hwp + FEC_MIIGSK_ENR); diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 8b2c6d7..8408c62 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -47,6 +47,10 @@ #define FEC_MIIGSK_CFGR 0x300 /* MIIGSK Configuration reg */ #define FEC_MIIGSK_ENR 0x308 /* MIIGSK Enable reg */ +#define BM_MIIGSK_CFGR_MII 0x00 +#define BM_MIIGSK_CFGR_RMII 0x01 +#define BM_MIIGSK_CFGR_FRCONT_10M 0x40 + #else #define FEC_ECNTRL 0x000 /* Ethernet control reg */ |