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mailbox.h

/* mailbox.h */

#ifndef MAILBOX_H
#define MAILBOX_H

#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/blkdev.h>

typedef u32 mbox_msg_t;
typedef void (mbox_receiver_t)(mbox_msg_t msg);
struct omap_mbox;

typedef int __bitwise omap_mbox_irq_t;
#define IRQ_TX ((__force omap_mbox_irq_t) 1)
#define IRQ_RX ((__force omap_mbox_irq_t) 2)

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)

00022 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);
};

00038 struct omap_mbox_queue {
      spinlock_t        lock;
      struct request_queue    *queue;
      struct work_struct      work;
      int   (*callback)(void *);
      struct omap_mbox  *mbox;
};

00046 struct omap_mbox {
      char              *name;
      unsigned int            irq;

      struct omap_mbox_queue  *txq, *rxq;

      struct omap_mbox_ops    *ops;

      mbox_msg_t        seq_snd, seq_rcv;

      struct device           dev;

      struct omap_mbox  *next;
      void              *priv;

      void              (*err_notify)(void);
};

int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg, void *);
void omap_mbox_init_seq(struct omap_mbox *);

struct omap_mbox *omap_mbox_get(const char *);
void omap_mbox_put(struct omap_mbox *);

int omap_mbox_register(struct omap_mbox *);
int omap_mbox_unregister(struct omap_mbox *);

#endif /* MAILBOX_H */

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