diff options
Diffstat (limited to 'arch/arm/plat-omap/mailbox.c')
| -rw-r--r-- | arch/arm/plat-omap/mailbox.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index fcac60dedc8..10f240558d9 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) |