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/*

 * SP804 Primecell Timer offsets

 *

 * Copyright (C) 2007 Bahadir Balban

 *

 */

#ifndef __SP804_TIMER_H__

#define __SP804_TIMER_H__

#include <libdev/io.h>

/* Register offsets */

#define SP804_LOAD                      0x0

#define SP804_VALUE                     0x4

#define SP804_CTRL                      0x8

#define SP804_INTCLR                    0xC

#define SP804_RIS                       0x10

#define SP804_MIS                       0x14

#define SP804_BGLOAD                    0x18

#define SP804_ENABLE                    (1 << 7)

#define SP804_PERIODIC                  (1 << 6)

#define SP804_IRQEN                     (1 << 5)

#define SP804_32BIT                     (1 << 1)

#define SP804_ONESHOT                   (1 << 0)

/* Timer prescaling */

#define SP804_SCALE_SHIFT               2

#define SP804_SCALE_DIV16               1

#define SP804_SCALE_DIV256              2

/* Wrapping = 0, Oneshot = 1 */

#define SP804_ONESHOT                   (1 << 0)

static inline __attribute__ ((always_inline))

void sp804_load(unsigned long timer_base, u32 val)

{

        write(val, timer_base + SP804_LOAD);

}

static inline __attribute__ ((always_inline))

void sp804_irq_clear(unsigned long timer_base)

{

        write(1, timer_base + SP804_INTCLR);

}

static inline __attribute__ ((always_inline))

void sp804_enable(unsigned long timer_base)

{

        volatile u32 reg = read(timer_base + SP804_CTRL);

        write(reg | SP804_ENABLE, timer_base + SP804_CTRL);

}

void timer_start(unsigned long timer_base);

void timer_load(u32 loadval, unsigned long timer_base);

u32 timer_read(unsigned long timer_base);

void timer_stop(unsigned long timer_base);

void timer_init_periodic(unsigned long timer_base, u32 load_value);

void timer_init_oneshot(unsigned long timer_base);

void timer_init(unsigned long timer_base, u32 load_value);

#endif /* __SP804_TIMER_H__ */