1/*
2 * Mailbox internal functions
3 *
4 * Copyright (C) 2006 Nokia Corporation
5 * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License.  See the file "COPYING" in the main directory of this archive
9 * for more details.
10 */
11
12#ifndef __ARCH_ARM_PLAT_MAILBOX_H
13#define __ARCH_ARM_PLAT_MAILBOX_H
14
15/*
16 * Mailbox sequence bit API
17 */
18#if defined(CONFIG_ARCH_OMAP1)
19#  define MBOX_USE_SEQ_BIT
20#elif defined(CONFIG_ARCH_OMAP2)
21#  define MBOX_USE_SEQ_BIT
22#endif
23
24#ifdef MBOX_USE_SEQ_BIT
25/* seq_rcv should be initialized with any value other than
26 * 0 and 1 << 31, to allow either value for the first
27 * message.  */
28static inline void mbox_seq_init(struct omap_mbox *mbox)
29{
30	/* any value other than 0 and 1 << 31 */
31	mbox->seq_rcv = 0xffffffff;
32}
33
34static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
35{
36	/* add seq_snd to msg */
37	*msg = (*msg & 0x7fffffff) | mbox->seq_snd;
38	/* flip seq_snd */
39	mbox->seq_snd ^= 1 << 31;
40}
41
42static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
43{
44	mbox_msg_t seq = msg & (1 << 31);
45	if (seq == mbox->seq_rcv)
46		return -1;
47	mbox->seq_rcv = seq;
48	return 0;
49}
50#else
51static inline void mbox_seq_init(struct omap_mbox *mbox)
52{
53}
54static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
55{
56}
57static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
58{
59	return 0;
60}
61#endif
62
63/* Mailbox FIFO handle functions */
64static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
65{
66	return mbox->ops->fifo_read(mbox);
67}
68static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
69{
70	mbox->ops->fifo_write(mbox, msg);
71}
72static inline int mbox_fifo_empty(struct omap_mbox *mbox)
73{
74	return mbox->ops->fifo_empty(mbox);
75}
76static inline int mbox_fifo_full(struct omap_mbox *mbox)
77{
78	return mbox->ops->fifo_full(mbox);
79}
80
81/* Mailbox IRQ handle functions */
82static inline void enable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
83{
84	mbox->ops->enable_irq(mbox, irq);
85}
86static inline void disable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
87{
88	mbox->ops->disable_irq(mbox, irq);
89}
90static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
91{
92	if (mbox->ops->ack_irq)
93		mbox->ops->ack_irq(mbox, irq);
94}
95static inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
96{
97	return mbox->ops->is_irq(mbox, irq);
98}
99
100#endif				/* __ARCH_ARM_PLAT_MAILBOX_H */
101