8255.h

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#ifndef __ANALOGY_8255_H__
#define __ANALOGY_8255_H__

#include <analogy/analogy_driver.h>

typedef int (*a4l_8255_cb_t)(int, int, int, unsigned long);

typedef struct subd_8255_struct {
        unsigned long cb_arg;
        a4l_8255_cb_t cb_func;
        unsigned int status;
        int have_irq;
        int io_bits;
} subd_8255_t;

#if (defined(CONFIG_XENO_DRIVERS_ANALOGY_8255) || \
     defined(CONFIG_XENO_DRIVERS_ANALOGY_8255_MODULE))

#define _8255_SIZE 4

#define _8255_DATA 0
#define _8255_CR 3

#define CR_C_LO_IO      0x01
#define CR_B_IO         0x02
#define CR_B_MODE       0x04
#define CR_C_HI_IO      0x08
#define CR_A_IO         0x10
#define CR_A_MODE(a)    ((a)<<5)
#define CR_CW           0x80

void a4l_subdev_8255_init(a4l_subd_t *subd);
void a4l_subdev_8255_interrupt(a4l_subd_t *subd);

#else /* !CONFIG_XENO_DRIVERS_ANALOGY_8255 */

#define a4l_subdev_8255_init(x)         do { } while(0)
#define a4l_subdev_8255_interrupt(x)    do { } while(0)

#endif /* CONFIG_XENO_DRIVERS_ANALOGY_8255 */

#endif /* !__ANALOGY_8255_H__ */