Linux Audio
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Embedded Linux Audio
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/* 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) 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); }; struct omap_mbox_queue { spinlock_t lock; struct request_queue *queue; struct work_struct work; int (*callback)(void *); struct omap_mbox *mbox; }; 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 */