| /* mailbox.h */ |
| |
| #ifndef MAILBOX_H |
| #define MAILBOX_H |
| |
| #include <linux/wait.h> |
| #include <linux/workqueue.h> |
| #include <linux/interrupt.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; |
| int (*callback)(void *); |
| struct omap_mbox *mbox; |
| }; |
| |
| struct omap_mbox { |
| char *name; |
| unsigned int irq; |
| |
| struct omap_mbox_queue *txq, *rxq; |
| |
| struct omap_mbox_ops *ops; |
| |
| mbox_msg_t seq_snd, seq_rcv; |
| |
| struct device *dev; |
| |
| struct omap_mbox *next; |
| void *priv; |
| |
| void (*err_notify)(void); |
| }; |
| |
| 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 *); |
| void omap_mbox_put(struct omap_mbox *); |
| |
| int omap_mbox_register(struct device *parent, struct omap_mbox *); |
| int omap_mbox_unregister(struct omap_mbox *); |
| |
| 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 */ |