| Hiroshi DOYU | 340a614 | 2006-12-07 15:43:59 -0800 | [diff] [blame] | 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. */ |
| 28 | static 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 | |
| 34 | static 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 | |
| 42 | static 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 |
| 51 | static inline void mbox_seq_init(struct omap_mbox *mbox) |
| 52 | { |
| 53 | } |
| 54 | static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg) |
| 55 | { |
| 56 | } |
| 57 | static 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 */ |
| 64 | static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) |
| 65 | { |
| 66 | return mbox->ops->fifo_read(mbox); |
| 67 | } |
| 68 | static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) |
| 69 | { |
| 70 | mbox->ops->fifo_write(mbox, msg); |
| 71 | } |
| 72 | static inline int mbox_fifo_empty(struct omap_mbox *mbox) |
| 73 | { |
| 74 | return mbox->ops->fifo_empty(mbox); |
| 75 | } |
| 76 | static inline int mbox_fifo_full(struct omap_mbox *mbox) |
| 77 | { |
| 78 | return mbox->ops->fifo_full(mbox); |
| 79 | } |
| 80 | |
| 81 | /* Mailbox IRQ handle functions */ |
| 82 | static inline void enable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) |
| 83 | { |
| 84 | mbox->ops->enable_irq(mbox, irq); |
| 85 | } |
| 86 | static inline void disable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) |
| 87 | { |
| 88 | mbox->ops->disable_irq(mbox, irq); |
| 89 | } |
| 90 | static 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 | } |
| 95 | static 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 */ |