libi2c.c File Reference

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include <stdarg.h>
#include <rtems.h>
#include <rtems/error.h>
#include <rtems/bspIo.h>
#include <rtems/libio.h>
#include <rtems/score/sysstate.h>
#include <rtems/libi2c.h>

Include dependency graph for libi2c.c:

Data Structures
struct	i2cbus

Macros
#define	DRVNM   "libi2c: "
#define	MAX_NO_BUSSES   8 /* Also limited by the macro building minor numbers */
#define	MAX_NO_DRIVERS   16 /* Number of high level drivers we support */
#define	MINOR2ADDR(minor)   ((minor)&((1<<10)-1))
#define	MINOR2BUS(minor)   (((minor)>>10)&7)
#define	MINOR2DRV(minor)   ((minor)>>13)
#define	DECL_CHECKED_BH(b, bh, m, s)
#define	DECL_CHECKED_DRV(d, b, m)
#define	DISPATCH(rval, entry, dflt)
#define	LOCK(m)   assert(!rtems_semaphore_obtain((m), RTEMS_WAIT, RTEMS_NO_TIMEOUT))
#define	UNLOCK(m)   rtems_semaphore_release((m))
#define	LIBLOCK()   LOCK(libmutex)
#define	LIBUNLOCK()   UNLOCK(libmutex)
#define	MUTEX_ATTS

Functions
rtems_status_code	rtems_i2c_init (rtems_device_major_number major, rtems_device_minor_number minor, void *arg)
rtems_status_code	rtems_i2c_open (rtems_device_major_number major, rtems_device_minor_number minor, void *arg)
rtems_status_code	rtems_i2c_close (rtems_device_major_number major, rtems_device_minor_number minor, void *arg)
rtems_status_code	rtems_i2c_read (rtems_device_major_number major, rtems_device_minor_number minor, void *arg)
rtems_status_code	rtems_i2c_write (rtems_device_major_number major, rtems_device_minor_number minor, void *arg)
rtems_status_code	rtems_i2c_ioctl (rtems_device_major_number major, rtems_device_minor_number minor, void *arg)
int	rtems_libi2c_initialize (void)
int	rtems_libi2c_register_bus (const char *name, rtems_libi2c_bus_t *bus)
rtems_status_code	rtems_libi2c_send_start (rtems_device_minor_number minor)
rtems_status_code	rtems_libi2c_send_stop (rtems_device_minor_number minor)
rtems_status_code	rtems_libi2c_send_addr (rtems_device_minor_number minor, int rw)
int	rtems_libi2c_read_bytes (rtems_device_minor_number minor, unsigned char *bytes, int nbytes)
int	rtems_libi2c_write_bytes (rtems_device_minor_number minor, const unsigned char *bytes, int nbytes)
int	rtems_libi2c_ioctl (rtems_device_minor_number minor, int cmd,...)
int	rtems_libi2c_start_read_bytes (rtems_device_minor_number minor, unsigned char *bytes, int nbytes)
int	rtems_libi2c_start_write_bytes (rtems_device_minor_number minor, const unsigned char *bytes, int nbytes)
int	rtems_libi2c_register_drv (const char *name, rtems_libi2c_drv_t *drvtbl, unsigned busno, unsigned i2caddr)

Variables
rtems_device_major_number	rtems_libi2c_major
const rtems_driver_address_table	rtems_libi2c_io_ops

Macro Definition Documentation

DECL_CHECKED_BH

#define DECL_CHECKED_BH	(		b,
			bh,
			m,
			s
	)

Value:

unsigned b = MINOR2BUS(m);              \
        rtems_libi2c_bus_t      *bh;            \
        if ( b >= MAX_NO_BUSSES || 0 == (bh=busses[b].bush) ) { \
                return s RTEMS_INVALID_NUMBER;  \
        }

DECL_CHECKED_DRV

#define DECL_CHECKED_DRV	(		d,
			b,
			m
	)

Value:

unsigned d = MINOR2DRV(m);              \
        unsigned b = MINOR2BUS(m);              \
        if (   b >= MAX_NO_BUSSES  || 0 == busses[b].bush       \
                || d >  MAX_NO_DRIVERS || (d && 0 == drvs[d-1].drv )) {\
                return RTEMS_INVALID_NUMBER;    \
        }

DISPATCH

#define DISPATCH	(		rval,
			entry,
			dflt
	)

Value:

do {                            \
                const rtems_driver_address_table *ops = drvs[--drv].drv->ops;   \
                rval = ops->entry ? ops->entry(major,minor,arg) : dflt; \
        } while (0)

MUTEX_ATTS

#define MUTEX_ATTS

Value:

(  RTEMS_PRIORITY                       \
         | RTEMS_BINARY_SEMAPHORE       \
         |RTEMS_INHERIT_PRIORITY        \
         |RTEMS_NO_PRIORITY_CEILING     \
         |RTEMS_LOCAL )