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authorHiroshi DOYU <Hiroshi.DOYU@nokia.com>2009-03-23 18:07:31 -0700
committerTony Lindgren <tony@atomide.com>2009-03-23 18:07:31 -0700
commit7a781afde63adf5d75042be8ada509c913a94afe (patch)
treea107104752527b0dbf23817307d71af71cf16fab /arch/arm/plat-omap/mailbox.c
parent9ae0ee0076d51d9017e89004643825a67d852910 (diff)
omap mailbox: convert sequence bit checking to module paramter
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Diffstat (limited to 'arch/arm/plat-omap/mailbox.c')
-rw-r--r--arch/arm/plat-omap/mailbox.c35
1 files changed, 16 insertions, 19 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index fcac60dedc8a..10f240558d90 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -32,30 +32,34 @@
#include <linux/io.h>
#include <mach/mailbox.h>
+static int enable_seq_bit;
+module_param(enable_seq_bit, bool, 0);
+MODULE_PARM_DESC(enable_seq_bit, "Enable sequence bit checking.");
+
static struct omap_mbox *mboxes;
static DEFINE_RWLOCK(mboxes_lock);
/*
* Mailbox sequence bit API
*/
-#if defined(CONFIG_ARCH_OMAP1)
-# define MBOX_USE_SEQ_BIT
-#elif defined(CONFIG_ARCH_OMAP2)
-# define MBOX_USE_SEQ_BIT
-#endif
-#ifdef MBOX_USE_SEQ_BIT
/* seq_rcv should be initialized with any value other than
* 0 and 1 << 31, to allow either value for the first
* message. */
static inline void mbox_seq_init(struct omap_mbox *mbox)
{
+ if (!enable_seq_bit)
+ return;
+
/* any value other than 0 and 1 << 31 */
mbox->seq_rcv = 0xffffffff;
}
static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
{
+ if (!enable_seq_bit)
+ return;
+
/* add seq_snd to msg */
*msg = (*msg & 0x7fffffff) | mbox->seq_snd;
/* flip seq_snd */
@@ -64,24 +68,17 @@ static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
{
- mbox_msg_t seq = msg & (1 << 31);
+ mbox_msg_t seq;
+
+ if (!enable_seq_bit)
+ return 0;
+
+ seq = msg & (1 << 31);
if (seq == mbox->seq_rcv)
return -1;
mbox->seq_rcv = seq;
return 0;
}
-#else
-static inline void mbox_seq_init(struct omap_mbox *mbox)
-{
-}
-static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
-{
-}
-static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
-{
- return 0;
-}
-#endif
/* Mailbox FIFO handle functions */
static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)