drivers/mailbox/omap-mbox.h

   1 /*
   2  * omap-mbox.h: OMAP mailbox internal definitions
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef OMAP_MBOX_H
  10 #define OMAP_MBOX_H
  11
  12 #include <linux/device.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/kfifo.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/workqueue.h>
  17 #include <linux/omap-mailbox.h>
  18
  19 typedef int __bitwise omap_mbox_type_t;
  20 #define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1)
  21 #define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2)
  22
  23 struct omap_mbox_ops {
  24         omap_mbox_type_t        type;
  25         int             (*startup)(struct omap_mbox *mbox);
  26         void            (*shutdown)(struct omap_mbox *mbox);
  27         /* fifo */
  28         mbox_msg_t      (*fifo_read)(struct omap_mbox *mbox);
  29         void            (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg);
  30         int             (*fifo_empty)(struct omap_mbox *mbox);
  31         int             (*fifo_full)(struct omap_mbox *mbox);
  32         /* irq */
  33         void            (*enable_irq)(struct omap_mbox *mbox,
  34                                                 omap_mbox_irq_t irq);
  35         void            (*disable_irq)(struct omap_mbox *mbox,
  36                                                 omap_mbox_irq_t irq);
  37         void            (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
  38         int             (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
  39         /* ctx */
  40         void            (*save_ctx)(struct omap_mbox *mbox);
  41         void            (*restore_ctx)(struct omap_mbox *mbox);
  42 };
  43
  44 struct omap_mbox_queue {
  45         spinlock_t              lock;
  46         struct kfifo            fifo;
  47         struct work_struct      work;
  48         struct tasklet_struct   tasklet;
  49         struct omap_mbox        *mbox;
  50         bool full;
  51 };
  52
  53 struct omap_mbox {
  54         const char              *name;
  55         unsigned int            irq;
  56         struct omap_mbox_queue  *txq, *rxq;
  57         struct omap_mbox_ops    *ops;
  58         struct device           *dev;
  59         void                    *priv;
  60         int                     use_count;
  61         struct blocking_notifier_head   notifier;
  62 };
  63
  64 int omap_mbox_register(struct device *parent, struct omap_mbox **);
  65 int omap_mbox_unregister(void);
  66
  67 #endif /* OMAP_MBOX_H */