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authorHiroshi DOYU <Hiroshi.DOYU@nokia.com>2006-12-07 15:43:59 -0800
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-09 10:37:10 +0100
commit340a614ac6766df18cba87ff7e66182193c2bd6d (patch)
treed1ad622625ba6933904567501a7387fc636c0a68 /include/asm-arm
parentc40fae9525e6c29c87a4f4361ff0a8d67a36e448 (diff)
ARM: OMAP: Add mailbox support for IVA
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>
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/arch-omap/mailbox.h73
1 files changed, 73 insertions, 0 deletions
diff --git a/include/asm-arm/arch-omap/mailbox.h b/include/asm-arm/arch-omap/mailbox.h
new file mode 100644
index 000000000000..4bf0909461f2
--- /dev/null
+++ b/include/asm-arm/arch-omap/mailbox.h
@@ -0,0 +1,73 @@
+/* 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;
+ request_queue_t *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 */