340a614ac6
This patch adds a generic mailbox interface for for DSP and IVA (Image Video Accelerator). This patch itself doesn't contain any IVA driver. Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/* mailbox.h */
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#ifndef MAILBOX_H
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#define MAILBOX_H
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <linux/blkdev.h>
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typedef u32 mbox_msg_t;
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typedef void (mbox_receiver_t)(mbox_msg_t msg);
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struct omap_mbox;
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typedef int __bitwise omap_mbox_irq_t;
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#define IRQ_TX ((__force omap_mbox_irq_t) 1)
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#define IRQ_RX ((__force omap_mbox_irq_t) 2)
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typedef int __bitwise omap_mbox_type_t;
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#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1)
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#define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2)
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struct omap_mbox_ops {
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omap_mbox_type_t type;
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int (*startup)(struct omap_mbox *mbox);
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void (*shutdown)(struct omap_mbox *mbox);
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/* fifo */
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mbox_msg_t (*fifo_read)(struct omap_mbox *mbox);
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void (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg);
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int (*fifo_empty)(struct omap_mbox *mbox);
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int (*fifo_full)(struct omap_mbox *mbox);
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/* irq */
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void (*enable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
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void (*disable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
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void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
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int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
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};
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struct omap_mbox_queue {
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spinlock_t lock;
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request_queue_t *queue;
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struct work_struct work;
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int (*callback)(void *);
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struct omap_mbox *mbox;
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};
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struct omap_mbox {
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char *name;
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unsigned int irq;
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struct omap_mbox_queue *txq, *rxq;
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struct omap_mbox_ops *ops;
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mbox_msg_t seq_snd, seq_rcv;
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struct device dev;
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struct omap_mbox *next;
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void *priv;
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void (*err_notify)(void);
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};
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int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg, void *);
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void omap_mbox_init_seq(struct omap_mbox *);
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struct omap_mbox *omap_mbox_get(const char *);
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void omap_mbox_put(struct omap_mbox *);
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int omap_mbox_register(struct omap_mbox *);
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int omap_mbox_unregister(struct omap_mbox *);
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#endif /* MAILBOX_H */
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