omap-mbox.h
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/*
* omap-mbox.h: OMAP mailbox internal definitions
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef OMAP_MBOX_H
#define OMAP_MBOX_H
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/kfifo.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/omap-mailbox.h>
typedef int __bitwise omap_mbox_type_t;
#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1)
#define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2)
struct omap_mbox_ops {
omap_mbox_type_t type;
int (*startup)(struct omap_mbox *mbox);
void (*shutdown)(struct omap_mbox *mbox);
/* fifo */
mbox_msg_t (*fifo_read)(struct omap_mbox *mbox);
void (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg);
int (*fifo_empty)(struct omap_mbox *mbox);
int (*fifo_full)(struct omap_mbox *mbox);
/* irq */
void (*enable_irq)(struct omap_mbox *mbox,
omap_mbox_irq_t irq);
void (*disable_irq)(struct omap_mbox *mbox,
omap_mbox_irq_t irq);
void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
/* ctx */
void (*save_ctx)(struct omap_mbox *mbox);
void (*restore_ctx)(struct omap_mbox *mbox);
};
struct omap_mbox_queue {
spinlock_t lock;
struct kfifo fifo;
struct work_struct work;
struct tasklet_struct tasklet;
struct omap_mbox *mbox;
bool full;
};
struct omap_mbox {
const char *name;
int irq;
struct omap_mbox_queue *txq, *rxq;
struct omap_mbox_ops *ops;
struct device *dev;
void *priv;
int use_count;
struct blocking_notifier_head notifier;
};
int omap_mbox_register(struct device *parent, struct omap_mbox **);
int omap_mbox_unregister(void);
#endif /* OMAP_MBOX_H */