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authorMagnus Damm <damm@igel.co.jp>2009-04-27 21:32:16 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-28 01:53:11 -0700
commit833cc67c7722e35863c6aaee9df56b442ef957ae (patch)
treeea7d2f6983fc9a8334065e291678eb418a1d5e44 /drivers/net/smsc911x.c
parent52fbc1007eb071c40a367462476eee695b412578 (diff)
smsc911x: add fifo byteswap support V2
This is V2 of the smsc911x fifo byteswap patch. The smsc911x hardware supports both big and little and endian hardware configurations, and the linux smsc911x driver currently detects word order. For correct operation on big endian platforms lacking swapped byte lanes the following patch is needed. Only fifo data is swapped, register data does not require any swapping. Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Steve Glendinning <steve.glendinning@smsc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/smsc911x.c')
-rw-r--r--drivers/net/smsc911x.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c
index eb7db032a78..5113b26fc2d 100644
--- a/drivers/net/smsc911x.c
+++ b/drivers/net/smsc911x.c
@@ -47,6 +47,7 @@
#include <linux/bitops.h>
#include <linux/irq.h>
#include <linux/io.h>
+#include <linux/swab.h>
#include <linux/phy.h>
#include <linux/smsc911x.h>
#include "smsc911x.h"
@@ -175,6 +176,12 @@ static inline void
smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
unsigned int wordcount)
{
+ if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
+ while (wordcount--)
+ smsc911x_reg_write(pdata, TX_DATA_FIFO, swab32(*buf++));
+ return;
+ }
+
if (pdata->config.flags & SMSC911X_USE_32BIT) {
writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
return;
@@ -194,6 +201,12 @@ static inline void
smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
unsigned int wordcount)
{
+ if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
+ while (wordcount--)
+ *buf++ = swab32(smsc911x_reg_read(pdata, RX_DATA_FIFO));
+ return;
+ }
+
if (pdata->config.flags & SMSC911X_USE_32BIT) {
readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
return;