net/ethoc: support big-endian register layout

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index a2c96fd..ff66549 100644 (file)
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -201,6 +201,7 @@ struct ethoc {
        void __iomem *membase;
        int dma_alloc;
        resource_size_t io_region_size;
+       bool big_endian;
 
        unsigned int num_bd;
        unsigned int num_tx;
@@ -236,12 +237,18 @@ struct ethoc_bd {
 
 static inline u32 ethoc_read(struct ethoc *dev, loff_t offset)
 {
-       return ioread32(dev->iobase + offset);
+       if (dev->big_endian)
+               return ioread32be(dev->iobase + offset);
+       else
+               return ioread32(dev->iobase + offset);
 }
 
 static inline void ethoc_write(struct ethoc *dev, loff_t offset, u32 data)
 {
-       iowrite32(data, dev->iobase + offset);
+       if (dev->big_endian)
+               iowrite32be(data, dev->iobase + offset);
+       else
+               iowrite32(data, dev->iobase + offset);
 }
 
 static inline void ethoc_read_bd(struct ethoc *dev, int index,
@@ -1106,6 +1113,9 @@ static int ethoc_probe(struct platform_device *pdev)
                priv->dma_alloc = buffer_size;
        }
 
+       priv->big_endian = pdata ? pdata->big_endian :
+               of_device_is_big_endian(pdev->dev.of_node);
+
        /* calculate the number of TX/RX buffers, maximum 128 supported */
        num_bd = min_t(unsigned int,
                128, (netdev->mem_end - netdev->mem_start + 1) / ETHOC_BUFSIZ);

diff --git a/include/net/ethoc.h b/include/net/ethoc.h
index 2a2d6bb..bb7f467 100644 (file)
--- a/include/net/ethoc.h
+++ b/include/net/ethoc.h
@@ -17,6 +17,7 @@ struct ethoc_platform_data {
        u8 hwaddr[IFHWADDRLEN];
        s8 phy_id;
        u32 eth_clkfreq;
+       bool big_endian;
 };
 
 #endif /* !LINUX_NET_ETHOC_H */