command.h

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#ifndef __ANALOGY_CMD__
#define __ANALOGY_CMD__

#include <analogy/context.h>

#define A4L_CMD_SIMUL 0x1

#define A4L_CMD_BULK 0x2

#define A4L_CMD_WRITE 0x4

#define TRIG_NONE       0x00000001

#define TRIG_NOW        0x00000002

#define TRIG_FOLLOW     0x00000004

#define TRIG_TIME       0x00000008

#define TRIG_TIMER      0x00000010

#define TRIG_COUNT      0x00000020

#define TRIG_EXT        0x00000040

#define TRIG_INT        0x00000080

#define TRIG_OTHER      0x00000100

#define TRIG_WAKE_EOS   0x0020

#define TRIG_ROUND_MASK 0x00030000

#define TRIG_ROUND_NEAREST 0x00000000

#define TRIG_ROUND_DOWN 0x00010000

#define TRIG_ROUND_UP 0x00020000

#define TRIG_ROUND_UP_NEXT 0x00030000

#define CHAN(a) ((a) & 0xffff)

#define RNG(a) (((a) & 0xff) << 16)

#define AREF(a) (((a) & 0xf) << 24)

#define FLAGS(a) ((a) & CR_FLAGS_MASK)

#define PACK(a, b, c) (CHAN(a) | RNG(b) | AREF(c))

#define PACK_FLAGS(a, b, c, d) (CHAN(a) | RNG(b) | AREF(c) | FLAGS(d))

#define AREF_GROUND 0x00

#define AREF_COMMON 0x01

#define AREF_DIFF 0x02

#define AREF_OTHER 0x03

#if !defined(DOXYGEN_CPP)

#define CR_FLAGS_MASK 0xfc000000
#define CR_ALT_FILTER (1<<26)
#define CR_DITHER CR_ALT_FILTER
#define CR_DEGLITCH CR_ALT_FILTER
#define CR_ALT_SOURCE (1<<27)
#define CR_EDGE (1<<28)
#define CR_INVERT (1<<29)

#if defined(__KERNEL__)
/* Channels macros only useful for the kernel side */
#define CR_CHAN(a) CHAN(a)
#define CR_RNG(a) (((a)>>16)&0xff)
#define CR_AREF(a) (((a)>>24)&0xf)
#endif /* __KERNEL__ */

#endif /* !DOXYGEN_CPP */

struct a4l_cmd_desc {
        unsigned char idx_subd;
        unsigned long flags;
        /* Command trigger characteristics */
        unsigned int start_src;
        unsigned int start_arg;
        unsigned int scan_begin_src;
        unsigned int scan_begin_arg;
        unsigned int convert_src;
        unsigned int convert_arg;
        unsigned int scan_end_src;
        unsigned int scan_end_arg;
        unsigned int stop_src;
        unsigned int stop_arg;
        unsigned char nb_chan;
        unsigned int *chan_descs;
        /* Driver specific fields */
        unsigned int data_len;
        sampl_t *data;
};
typedef struct a4l_cmd_desc a4l_cmd_t;

#if defined(__KERNEL__) && !defined(DOXYGEN_CPP)

/* --- Command related function --- */
void a4l_free_cmddesc(a4l_cmd_t * desc);

/* --- Upper layer functions --- */
int a4l_check_cmddesc(a4l_cxt_t * cxt, a4l_cmd_t * desc);
int a4l_ioctl_cmd(a4l_cxt_t * cxt, void *arg);

#endif /* __KERNEL__ && !DOXYGEN_CPP */

#endif /* __ANALOGY_CMD__ */