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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>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
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* omap-mbox.h: OMAP mailbox internal definitions
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef OMAP_MBOX_H
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#define OMAP_MBOX_H
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/kfifo.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/omap-mailbox.h>
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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,
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omap_mbox_irq_t irq);
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void (*disable_irq)(struct omap_mbox *mbox,
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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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/* ctx */
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void (*save_ctx)(struct omap_mbox *mbox);
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void (*restore_ctx)(struct omap_mbox *mbox);
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};
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struct omap_mbox_queue {
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spinlock_t lock;
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struct kfifo fifo;
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struct work_struct work;
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struct tasklet_struct tasklet;
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struct omap_mbox *mbox;
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bool full;
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};
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struct omap_mbox {
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const 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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struct device *dev;
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void *priv;
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int use_count;
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struct blocking_notifier_head notifier;
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};
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int omap_mbox_register(struct device *parent, struct omap_mbox **);
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int omap_mbox_unregister(void);
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#endif /* OMAP_MBOX_H */
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