@@ -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);
@@ -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 */
This allows using OpenCores ethernet controller attached to its host in native-endian mode with bi-endian CPUs. Example of such system is Xtensa XTFPGA platform. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> --- Changes v1->v2: - expand changelog with motivation for the change. drivers/net/ethernet/ethoc.c | 14 ++++++++++++-- include/net/ethoc.h | 1 + 2 files changed, 13 insertions(+), 2 deletions(-)