1/* mailbox.h */ 2 3#ifndef MAILBOX_H 4#define MAILBOX_H 5 6#include <linux/wait.h> 7#include <linux/workqueue.h> 8#include <linux/blkdev.h> 9 10typedef u32 mbox_msg_t; 11typedef void (mbox_receiver_t)(mbox_msg_t msg); 12struct omap_mbox; 13 14typedef int __bitwise omap_mbox_irq_t; 15#define IRQ_TX ((__force omap_mbox_irq_t) 1) 16#define IRQ_RX ((__force omap_mbox_irq_t) 2) 17 18typedef int __bitwise omap_mbox_type_t; 19#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1) 20#define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2) 21 22struct omap_mbox_ops { 23 omap_mbox_type_t type; 24 int (*startup)(struct omap_mbox *mbox); 25 void (*shutdown)(struct omap_mbox *mbox); 26 /* fifo */ 27 mbox_msg_t (*fifo_read)(struct omap_mbox *mbox); 28 void (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg); 29 int (*fifo_empty)(struct omap_mbox *mbox); 30 int (*fifo_full)(struct omap_mbox *mbox); 31 /* irq */ 32 void (*enable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); 33 void (*disable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); 34 void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); 35 int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); 36}; 37 38struct omap_mbox_queue { 39 spinlock_t lock; 40 request_queue_t *queue; 41 struct work_struct work; 42 int (*callback)(void *); 43 struct omap_mbox *mbox; 44}; 45 46struct omap_mbox { 47 char *name; 48 unsigned int irq; 49 50 struct omap_mbox_queue *txq, *rxq; 51 52 struct omap_mbox_ops *ops; 53 54 mbox_msg_t seq_snd, seq_rcv; 55 56 struct device dev; 57 58 struct omap_mbox *next; 59 void *priv; 60 61 void (*err_notify)(void); 62}; 63 64int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg, void *); 65void omap_mbox_init_seq(struct omap_mbox *); 66 67struct omap_mbox *omap_mbox_get(const char *); 68void omap_mbox_put(struct omap_mbox *); 69 70int omap_mbox_register(struct omap_mbox *); 71int omap_mbox_unregister(struct omap_mbox *); 72 73#endif /* MAILBOX_H */ 74