From: Joe Perches <j...@perches.com>
arcnet uses an I/O scheme which can align I/O addresses to word boundaries
on different architectures.
Add arcnet specific macros which can hide this alignment calculation.
Signed-off-by: Joe Perches <j...@perches.com>
Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>
---
drivers/net/arcnet/arcdevice.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/net/arcnet/arcdevice.h b/drivers/net/arcnet/arcdevice.h
index 9ca135d..95e7ed6 100644
--- a/drivers/net/arcnet/arcdevice.h
+++ b/drivers/net/arcnet/arcdevice.h
@@ -342,5 +342,30 @@ netdev_tx_t arcnet_send_packet(struct sk_buff *skb,
struct net_device *dev);
void arcnet_timeout(struct net_device *dev);
+/* I/O equivalents */
+
+/* addr and offset allow register like names to define the actual IO address.
+ * A configuration option multiplies the offset for alignment.
+ */
+#define arcnet_inb(addr, offset) \
+ inb((addr) + (offset))
+#define arcnet_outb(value, addr, offset) \
+ outb(value, (addr) + (offset))
+
+#define arcnet_insb(addr, offset, buffer, count) \
+ insb((addr) + (offset), buffer, count)
+#define arcnet_outsb(addr, offset, buffer, count) \
+ outsb((addr) + (offset), buffer, count)
+
+#define arcnet_inw(addr, offset) \
+ inw((addr) + (offset))
+#define arcnet_outw(value, addr, offset) \
+ outw(value, (addr) + (offset))
+
+#define arcnet_insw(addr, offset, buffer, count) \
+ insw((addr) + (offset), buffer, count)
+#define arcnet_outsw(addr, offset, buffer, count) \
+ outsw((addr) + (offset), buffer, count)
+
#endif /* __KERNEL__ */
#endif /* _LINUX_ARCDEVICE_H */
--
2.5.1
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