From: Joe Perches <joe@perches.com>
Date: Tue, 5 May 2015 17:06:05 +0000 (-0700)
Subject: arcnet: Add arcnet_<I/O> macros
X-Git-Tag: v4.4-rc1~141^2~291^2~13
X-Git-Url: http://git.cascardo.info/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=e5fcfc1f8d3cfaf432a93d39df3e5d7718c58848

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 9ca135d0f114..95e7ed6781c3 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 */