net: smc911x: Add pkt_data_pull and pkt_data_push function

The RSK7203 board has the SMSC9118 wired up 'incorrectly'.
Byte-swapping is necessary, and so poor performance is inevitable.
This problem cannot evade by the swap function of CHIP, this can
evade by software Byte-swapping.
And this has problem by FIFO access only. pkt_data_pull/pkt_data_push
functions necessary to solve this problem.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index 0fff8208036e15cd146d83112cb4db3486338c52..648c94cbbbbd8046631ad19bac80d6a54e019d2a 100644 (file)
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -57,6 +57,11 @@ static inline void reg_write(u32 addr, u32 val)
 #error "SMC911X: undefined bus width"
 #endif /* CONFIG_DRIVER_SMC911X_16_BIT */
 
+u32 pkt_data_pull(u32 addr) \
+       __attribute__ ((weak, alias ("reg_read")));
+void pkt_data_push(u32 addr, u32 val) \
+       __attribute__ ((weak, alias ("reg_write")));
+
 #define mdelay(n)       udelay((n)*1000)
 
 /* Below are the register offsets and bit definitions
@@ -641,7 +646,7 @@ int eth_send(volatile void *packet, int length)
        tmplen = (length + 3) / 4;
 
        while (tmplen--)
-               reg_write(TX_DATA_FIFO, *data++);
+               pkt_data_push(TX_DATA_FIFO, *data++);
 
        /* wait for transmission */
        while (!((reg_read(TX_FIFO_INF) & TX_FIFO_INF_TSUSED) >> 16));
@@ -684,7 +689,7 @@ int eth_rx(void)
 
                tmplen = (pktlen + 2+ 3) / 4;
                while (tmplen--)
-                       *data++ = reg_read(RX_DATA_FIFO);
+                       *data++ = pkt_data_pull(RX_DATA_FIFO);
 
                if (status & RX_STS_ES)
                        printf(DRIVERNAME