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authorAyaz Abdulla <aabdulla@nvidia.com>2008-02-04 15:13:59 -0500
committerJeff Garzik <jeff@garzik.org>2008-02-06 06:41:14 -0500
commitb2976d23a15aac11e8e77a496108b9f4040fac4d (patch)
treef5ac3f3007795411969047233591f0b364db65cd /drivers/net
parent47eaa267a5db1729d238f977364e297b8963e115 (diff)
forcedeth: restart tx/rx
This patch fixes the issue where the transmitter and receiver must be restarted when applying new changes to certain registers. Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/forcedeth.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 36342230a6de..6e47b1103cd2 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -624,6 +624,9 @@ union ring_type {
#define NV_MSI_X_VECTOR_TX 0x1
#define NV_MSI_X_VECTOR_OTHER 0x2
+#define NV_RESTART_TX 0x1
+#define NV_RESTART_RX 0x2
+
/* statistics */
struct nv_ethtool_str {
char name[ETH_GSTRING_LEN];
@@ -2767,6 +2770,7 @@ static int nv_update_linkspeed(struct net_device *dev)
int mii_status;
int retval = 0;
u32 control_1000, status_1000, phyreg, pause_flags, txreg;
+ u32 txrxFlags = 0;
/* BMSR_LSTATUS is latched, read it twice:
* we want the current value.
@@ -2862,6 +2866,16 @@ set_speed:
np->duplex = newdup;
np->linkspeed = newls;
+ /* The transmitter and receiver must be restarted for safe update */
+ if (readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_START) {
+ txrxFlags |= NV_RESTART_TX;
+ nv_stop_tx(dev);
+ }
+ if (readl(base + NvRegReceiverControl) & NVREG_RCVCTL_START) {
+ txrxFlags |= NV_RESTART_RX;
+ nv_stop_rx(dev);
+ }
+
if (np->gigabit == PHY_GIGABIT) {
phyreg = readl(base + NvRegRandomSeed);
phyreg &= ~(0x3FF00);
@@ -2950,6 +2964,11 @@ set_speed:
}
nv_update_pause(dev, pause_flags);
+ if (txrxFlags & NV_RESTART_TX)
+ nv_start_tx(dev);
+ if (txrxFlags & NV_RESTART_RX)
+ nv_start_rx(dev);
+
return retval;
}