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>

1 files changed, 0 insertions, 105 deletions

diff --git a/arch/arm/plat-omap/include/plat/mailbox.h b/arch/arm/plat-omap/include/plat/mailbox.h
deleted file mode 100644
index e98f7e234686..000000000000
--- a/arch/arm/plat-omap/include/plat/mailbox.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/* mailbox.h */
-
-#ifndef MAILBOX_H
-#define MAILBOX_H
-
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/kfifo.h>
-
-typedef u32 mbox_msg_t;
-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);
-        /* 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_msg_send(struct omap_mbox *, mbox_msg_t msg);
-void omap_mbox_init_seq(struct omap_mbox *);
-
-struct omap_mbox *omap_mbox_get(const char *, struct notifier_block *nb);
-void omap_mbox_put(struct omap_mbox *mbox, struct notifier_block *nb);
-
-int omap_mbox_register(struct device *parent, struct omap_mbox **);
-int omap_mbox_unregister(void);
-
-static inline void omap_mbox_save_ctx(struct omap_mbox *mbox)
-{
-        if (!mbox->ops->save_ctx) {
-                dev_err(mbox->dev, "%s:\tno save\n", __func__);
-                return;
-        }
-
-        mbox->ops->save_ctx(mbox);
-}
-
-static inline void omap_mbox_restore_ctx(struct omap_mbox *mbox)
-{
-        if (!mbox->ops->restore_ctx) {
-                dev_err(mbox->dev, "%s:\tno restore\n", __func__);
-                return;
-        }
-
-        mbox->ops->restore_ctx(mbox);
-}
-
-static inline void omap_mbox_enable_irq(struct omap_mbox *mbox,
-                                        omap_mbox_irq_t irq)
-{
-        mbox->ops->enable_irq(mbox, irq);
-}
-
-static inline void omap_mbox_disable_irq(struct omap_mbox *mbox,
-                                         omap_mbox_irq_t irq)
-{
-        mbox->ops->disable_irq(mbox, irq);
-}
-
-#endif /* MAILBOX_H */