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authorEric Benard <eric@eukrea.com>2012-01-12 06:10:28 +0000
committerDavid S. Miller <davem@davemloft.net>2012-01-12 20:05:28 -0800
commit8d82f219c2d476811cd3157a39c7b5c1f045ebc3 (patch)
tree32bda05590b8799574c89d2f3bdc22ea47973cb5 /drivers
parent25cecd7e355bf90b8fea039bd06947bb3234e77d (diff)
downloadlinux-linaro-stable-8d82f219c2d476811cd3157a39c7b5c1f045ebc3.tar.gz
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 BĂ©nard <eric@eukrea.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/freescale/fec.c9
-rw-r--r--drivers/net/ethernet/freescale/fec.h4
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 236cc892ec3e..7b25e9cf13f6 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 8b2c6d797e6d..8408c627b195 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 */