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authorSuman Anna <s-anna@ti.com>2013-03-12 17:55:29 -0500
committerSuman Anna <s-anna@ti.com>2013-06-11 11:41:51 -0500
commitc869c75c16b3d1ffcf64fb2fd63ba0c4a369071c (patch)
tree02be072bd60241b604e2295addf78e817c47e3ca /drivers/mailbox/omap-mbox.h
parentfe32c1f6024e357f586b1d666237cab80a1215ce (diff)
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mailbox/omap: move the OMAP mailbox framework to drivers
The mailbox hardware (in OMAP) uses a queued mailbox interrupt mechanism that provides a communication channel between processors through a set of registers and their associated interrupt signals by sending and receiving messages. The OMAP mailbox framework/driver code is moved to be under drivers/mailbox, in preparation for adapting to a common mailbox driver framework. This allows the build for OMAP mailbox to be enabled (it was disabled during the multi-platform support). As part of the migration from plat and mach code: - Kconfig symbols have been renamed to build OMAP1 or OMAP2+ drivers. - mailbox.h under plat-omap/plat/include has been split into a public and private header files. The public header has only the API related functions and types. - The module name mailbox.ko from plat-omap is changed to omap-mailbox.ko - The module name mailbox_mach.ko from mach-omapX is changed as mailbox_omap1.ko for OMAP1 mailbox_omap2.ko for OMAP2+ Cc: Tony Lindgren <tony@atomide.com> [gregkh@linuxfoundation.org: ack for staging part] Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Omar Ramirez Luna <omar.ramirez@copitl.com> Signed-off-by: Suman Anna <s-anna@ti.com>
Diffstat (limited to 'drivers/mailbox/omap-mbox.h')
-rw-r--r--drivers/mailbox/omap-mbox.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/mailbox/omap-mbox.h b/drivers/mailbox/omap-mbox.h
new file mode 100644
index 000000000000..6cd38fc68599
--- /dev/null
+++ b/drivers/mailbox/omap-mbox.h
@@ -0,0 +1,67 @@
+/*
+ * omap-mbox.h: OMAP mailbox internal definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef OMAP_MBOX_H
+#define OMAP_MBOX_H
+
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/kfifo.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/omap-mailbox.h>
+
+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);
+ /* ctx */
+ void (*save_ctx)(struct omap_mbox *mbox);
+ void (*restore_ctx)(struct omap_mbox *mbox);
+};
+
+struct omap_mbox_queue {
+ spinlock_t lock;
+ struct kfifo fifo;
+ struct work_struct work;
+ struct tasklet_struct tasklet;
+ struct omap_mbox *mbox;
+ bool full;
+};
+
+struct omap_mbox {
+ const char *name;
+ unsigned int irq;
+ struct omap_mbox_queue *txq, *rxq;
+ struct omap_mbox_ops *ops;
+ struct device *dev;
+ void *priv;
+ int use_count;
+ struct blocking_notifier_head notifier;
+};
+
+int omap_mbox_register(struct device *parent, struct omap_mbox **);
+int omap_mbox_unregister(void);
+
+#endif /* OMAP_MBOX_H */
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