From 8c967acc0e8a0433a9436bf0460349f3d37aa74a Mon Sep 17 00:00:00 2001
From: Alexander Yurchenko <grange@cvs.openbsd.org>
Date: Fri, 29 Sep 2006 19:38:53 +0000
Subject: Extend bus master interface so that block read/write operations can
 be offloaded to hardware.

---
 sys/dev/onewire/onewire.c    | 48 ++++++++++++++++++++++++++------------------
 sys/dev/onewire/onewirevar.h |  6 ++++--
 2 files changed, 33 insertions(+), 21 deletions(-)

(limited to 'sys')

diff --git a/sys/dev/onewire/onewire.c b/sys/dev/onewire/onewire.c
index 9860dfb1301..0873c4b97d9 100644
--- a/sys/dev/onewire/onewire.c
+++ b/sys/dev/onewire/onewire.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: onewire.c,v 1.2 2006/08/03 18:48:13 grange Exp $	*/
+/*	$OpenBSD: onewire.c,v 1.3 2006/09/29 19:38:52 grange Exp $	*/
 
 /*
  * Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
@@ -240,6 +240,34 @@ onewire_write_byte(void *arg, int value)
 		bus->bus_bit(bus->bus_cookie, (value >> i) & 0x1);
 }
 
+void
+onewire_read_block(void *arg, void *buf, int len)
+{
+	struct onewire_softc *sc = arg;
+	struct onewire_bus *bus = sc->sc_bus;
+	u_int8_t *p = buf;
+
+	if (bus->bus_read_block != NULL)
+		return (bus->bus_read_block(bus->bus_cookie, buf, len));
+
+	while (len--)
+		*p++ = onewire_read_byte(arg);
+}
+
+void
+onewire_write_block(void *arg, const void *buf, int len)
+{
+	struct onewire_softc *sc = arg;
+	struct onewire_bus *bus = sc->sc_bus;
+	const u_int8_t *p = buf;
+
+	if (bus->bus_write_block != NULL)
+		return (bus->bus_write_block(bus->bus_cookie, buf, len));
+
+	while (len--)
+		onewire_write_byte(arg, *p++);
+}
+
 int
 onewire_triplet(void *arg, int dir)
 {
@@ -268,24 +296,6 @@ onewire_triplet(void *arg, int dir)
 	return (rv);
 }
 
-void
-onewire_read_block(void *arg, void *buf, int len)
-{
-	u_int8_t *p = buf;
-
-	while (len--)
-		*p++ = onewire_read_byte(arg);
-}
-
-void
-onewire_write_block(void *arg, const void *buf, int len)
-{
-	const u_int8_t *p = buf;
-
-	while (len--)
-		onewire_write_byte(arg, *p++);
-}
-
 void
 onewire_matchrom(void *arg, u_int64_t rom)
 {
diff --git a/sys/dev/onewire/onewirevar.h b/sys/dev/onewire/onewirevar.h
index 51b7ea4a434..9da8c335bff 100644
--- a/sys/dev/onewire/onewirevar.h
+++ b/sys/dev/onewire/onewirevar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: onewirevar.h,v 1.1 2006/03/04 16:27:03 grange Exp $	*/
+/*	$OpenBSD: onewirevar.h,v 1.2 2006/09/29 19:38:52 grange Exp $	*/
 
 /*
  * Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
@@ -31,6 +31,8 @@ struct onewire_bus {
 	int	(*bus_bit)(void *, int);
 	int	(*bus_read_byte)(void *);
 	void	(*bus_write_byte)(void *, int);
+	void	(*bus_read_block)(void *, void *, int);
+	void	(*bus_write_block)(void *, const void *, int);
 	int	(*bus_triplet)(void *, int);
 };
 
@@ -41,9 +43,9 @@ int		onewire_reset(void *);
 int		onewire_bit(void *, int);
 int		onewire_read_byte(void *);
 void		onewire_write_byte(void *, int);
-int		onewire_triplet(void *, int);
 void		onewire_read_block(void *, void *, int);
 void		onewire_write_block(void *, const void *, int);
+int		onewire_triplet(void *, int);
 void		onewire_matchrom(void *, u_int64_t);
 
 #define ONEWIRE_NOWAIT		0x0001
-- 
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