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authorFugang Duan <B38611@freescale.com>2014-09-12 23:00:51 +0200
committerDavid S. Miller <davem@davemloft.net>2014-09-13 23:32:16 +0200
commit106c314c7a765d3c472f264e0915de6180922cda (patch)
tree5b4aec76163d621f0735743b258e042793632beb /drivers/net/ethernet/freescale/fec_main.c
parentnet: fec: init multi queue date structure (diff)
downloadlinux-106c314c7a765d3c472f264e0915de6180922cda.tar.xz
linux-106c314c7a765d3c472f264e0915de6180922cda.zip
net:fec: Disable enet-avb MAC instead of reset MAC
For i.MX6SX enet use AXI bus, reset MAC will make system bus dead if ENET-AXI bus has pending access (AHB bus should not have such issue). So, disable enet with AVB MAC instead of reset MAC itself. Signed-off-by: Fugang Duan <B38611@freescale.com> Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--drivers/net/ethernet/freescale/fec_main.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 03972f7e1ba9..5f8e997defad 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -945,9 +945,16 @@ fec_restart(struct net_device *ndev)
u32 rcntl = OPT_FRAME_SIZE | 0x04;
u32 ecntl = 0x2; /* ETHEREN */
- /* Whack a reset. We should wait for this. */
- writel(1, fep->hwp + FEC_ECNTRL);
- udelay(10);
+ /* Whack a reset. We should wait for this.
+ * For i.MX6SX SOC, enet use AXI bus, we use disable MAC
+ * instead of reset MAC itself.
+ */
+ if (id_entry && id_entry->driver_data & FEC_QUIRK_HAS_AVB) {
+ writel(0, fep->hwp + FEC_ECNTRL);
+ } else {
+ writel(1, fep->hwp + FEC_ECNTRL);
+ udelay(10);
+ }
/*
* enet-mac reset will reset mac address registers too,
@@ -1118,9 +1125,16 @@ fec_stop(struct net_device *ndev)
netdev_err(ndev, "Graceful transmit stop did not complete!\n");
}
- /* Whack a reset. We should wait for this. */
- writel(1, fep->hwp + FEC_ECNTRL);
- udelay(10);
+ /* Whack a reset. We should wait for this.
+ * For i.MX6SX SOC, enet use AXI bus, we use disable MAC
+ * instead of reset MAC itself.
+ */
+ if (id_entry && id_entry->driver_data & FEC_QUIRK_HAS_AVB) {
+ writel(0, fep->hwp + FEC_ECNTRL);
+ } else {
+ writel(1, fep->hwp + FEC_ECNTRL);
+ udelay(10);
+ }
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);