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340a614ac6
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>
101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/*
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* Mailbox internal functions
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*
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* Copyright (C) 2006 Nokia Corporation
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* Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef __ARCH_ARM_PLAT_MAILBOX_H
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#define __ARCH_ARM_PLAT_MAILBOX_H
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/*
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* Mailbox sequence bit API
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*/
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#if defined(CONFIG_ARCH_OMAP1)
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# define MBOX_USE_SEQ_BIT
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#elif defined(CONFIG_ARCH_OMAP2)
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# define MBOX_USE_SEQ_BIT
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#endif
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#ifdef MBOX_USE_SEQ_BIT
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/* seq_rcv should be initialized with any value other than
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* 0 and 1 << 31, to allow either value for the first
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* message. */
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static inline void mbox_seq_init(struct omap_mbox *mbox)
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{
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/* any value other than 0 and 1 << 31 */
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mbox->seq_rcv = 0xffffffff;
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}
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static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
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{
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/* add seq_snd to msg */
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*msg = (*msg & 0x7fffffff) | mbox->seq_snd;
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/* flip seq_snd */
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mbox->seq_snd ^= 1 << 31;
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}
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static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
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{
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mbox_msg_t seq = msg & (1 << 31);
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if (seq == mbox->seq_rcv)
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return -1;
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mbox->seq_rcv = seq;
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return 0;
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}
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#else
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static inline void mbox_seq_init(struct omap_mbox *mbox)
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{
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}
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static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
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{
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}
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static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
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{
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return 0;
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}
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#endif
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/* Mailbox FIFO handle functions */
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static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
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{
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return mbox->ops->fifo_read(mbox);
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}
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static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
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{
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mbox->ops->fifo_write(mbox, msg);
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}
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static inline int mbox_fifo_empty(struct omap_mbox *mbox)
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{
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return mbox->ops->fifo_empty(mbox);
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}
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static inline int mbox_fifo_full(struct omap_mbox *mbox)
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{
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return mbox->ops->fifo_full(mbox);
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}
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/* Mailbox IRQ handle functions */
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static inline void enable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
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{
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mbox->ops->enable_irq(mbox, irq);
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}
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static inline void disable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
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{
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mbox->ops->disable_irq(mbox, irq);
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}
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static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
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{
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if (mbox->ops->ack_irq)
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mbox->ops->ack_irq(mbox, irq);
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}
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static inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
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{
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return mbox->ops->is_irq(mbox, irq);
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}
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#endif /* __ARCH_ARM_PLAT_MAILBOX_H */
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