api_2.5.6.1/api/8255_8h_source.html

00001
00021 #ifndef __ANALOGY_8255_H__
00022 #define __ANALOGY_8255_H__
00023
00024 #include <analogy/analogy_driver.h>
00025
00026 typedef int (*a4l_8255_cb_t)(int, int, int, unsigned long);
00027
00028 typedef struct subd_8255_struct {
00029         unsigned long cb_arg;
00030         a4l_8255_cb_t cb_func;
00031         unsigned int status;
00032         int have_irq;
00033         int io_bits;
00034 } subd_8255_t;
00035
00036 #if (defined(CONFIG_XENO_DRIVERS_ANALOGY_8255) || \
00037      defined(CONFIG_XENO_DRIVERS_ANALOGY_8255_MODULE))
00038
00039 #define _8255_SIZE 4
00040
00041 #define _8255_DATA 0
00042 #define _8255_CR 3
00043
00044 #define CR_C_LO_IO      0x01
00045 #define CR_B_IO         0x02
00046 #define CR_B_MODE       0x04
00047 #define CR_C_HI_IO      0x08
00048 #define CR_A_IO         0x10
00049 #define CR_A_MODE(a)    ((a)<<5)
00050 #define CR_CW           0x80
00051
00052 void subdev_8255_init(a4l_subd_t *subd);
00053 void subdev_8255_interrupt(a4l_subd_t *subd);
00054
00055 #else /* !CONFIG_XENO_DRIVERS_ANALOGY_8255 */
00056
00057 #define subdev_8255_init(x)             do { } while(0)
00058 #define subdev_8255_interrupt(x)        do { } while(0)
00059
00060 #endif /* CONFIG_XENO_DRIVERS_ANALOGY_8255 */
00061
00062 #endif /* !__ANALOGY_8255_H__ */