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/*
* Mailbox internal functions
*
* Copyright (C) 2006 Nokia Corporation
* Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef __ARCH_ARM_PLAT_MAILBOX_H
#define __ARCH_ARM_PLAT_MAILBOX_H
/*
* 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)
{
/* 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)
{
/* add seq_snd to msg */
*msg = (*msg & 0x7fffffff) | mbox->seq_snd;
/* flip seq_snd */
mbox->seq_snd ^= 1 << 31;
}
static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
{
mbox_msg_t 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)
{
return mbox->ops->fifo_read(mbox);
}
static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
{
mbox->ops->fifo_write(mbox, msg);
}
static inline int mbox_fifo_empty(struct omap_mbox *mbox)
{
return mbox->ops->fifo_empty(mbox);
}
static inline int mbox_fifo_full(struct omap_mbox *mbox)
{
return mbox->ops->fifo_full(mbox);
}
/* Mailbox IRQ handle functions */
static inline void enable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
mbox->ops->enable_irq(mbox, irq);
}
static inline void disable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
mbox->ops->disable_irq(mbox, irq);
}
static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
if (mbox->ops->ack_irq)
mbox->ops->ack_irq(mbox, irq);
}
static inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
return mbox->ops->is_irq(mbox, irq);
}
#endif /* __ARCH_ARM_PLAT_MAILBOX_H */
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