arcnet: Add arcnet_<I/O> macros

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 <joe@perches.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

diff --git a/drivers/net/arcnet/arcdevice.h b/drivers/net/arcnet/arcdevice.h
index 9ca135d0f11499eb8a2edd721c1f14b19c87e741..95e7ed6781c31d76ea3d6946f681a79af30959a6 100644 (file)
--- 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 */