include/analogy/device.h

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#ifndef __ANALOGY_DEVICE__
#define __ANALOGY_DEVICE__

#ifndef DOXYGEN_CPP

#include <analogy/context.h>
#include <analogy/driver.h>
#include <analogy/transfer.h>

#ifdef __KERNEL__

#define A4L_NB_DEVICES 10

#define A4L_DEV_ATTACHED_NR 0

struct a4l_device {

        /* Spinlock for global device use */
        a4l_lock_t lock;

        /* Device specific flags */
        unsigned long flags;

        /* Driver assigned to this device thanks to attaching
           procedure */
        a4l_drv_t *driver;

        /* Hidden description stuff */
        struct list_head subdvsq;

        /* Context-dependent stuff */
        a4l_trf_t transfer;

        /* Private data useful for drivers functioning */
        void *priv;
};
typedef struct a4l_device a4l_dev_t;

#endif /* __KERNEL__ */

/* DEVCFG ioctl argument structure */
struct a4l_link_desc {
        unsigned char bname_size;
        char *bname;
        unsigned int opts_size;
        void *opts;
};
typedef struct a4l_link_desc a4l_lnkdesc_t;

/* DEVINFO ioctl argument structure */
struct a4l_dev_info {
        char board_name[A4L_NAMELEN];
        int nb_subd;
        int idx_read_subd;
        int idx_write_subd;
};
typedef struct a4l_dev_info a4l_dvinfo_t;

#ifdef __KERNEL__

/* --- Devices tab related functions --- */
void a4l_init_devs(void);
int a4l_check_cleanup_devs(void);
int a4l_rdproc_devs(char *page,
                    char **start,
                    off_t off, int count, int *eof, void *data);

/* --- Context related function / macro --- */
void a4l_set_dev(a4l_cxt_t *cxt);
#define a4l_get_dev(x) ((x)->dev)

/* --- Upper layer functions --- */
int a4l_ioctl_devcfg(a4l_cxt_t * cxt, void *arg);
int a4l_ioctl_devinfo(a4l_cxt_t * cxt, void *arg);

#endif /* __KERNEL__ */

#endif /* !DOXYGEN_CPP */

#endif /* __ANALOGY_DEVICE__ */