vmod/lib/libvmod12e16.c

   1 /**
   2    @file   libvmod12e16.c
   3    @brief  Library file for the vmod12e16 driver
   4    @author Juan David Gonzalez Cobas
   5    @date   October 17 2009
   6  */
   7
   8 #include <sys/ioctl.h>
   9 #include <linux/types.h>
  10 #include <unistd.h>
  11 #include <fcntl.h>
  12 #include <stdio.h>
  13 #include "vmod12e16drvr.h"
  14 #include "libvmod12e16.h"
  15
  16 int vmod12e16_get_handle(unsigned int lun)
  17 {
  18         const int name_size = 256;
  19         char devname[name_size];
  20         const char *driver_name = "vmod12e16";
  21
  22         snprintf(devname, name_size, "/dev/%s.%d", driver_name, lun);
  23         return open(devname, O_RDWR);
  24 }
  25
  26 int vmod12e16_convert(int fd, int channel,
  27         enum vmod12e16_amplification factor, int *value)
  28 {
  29         struct vmod12e16_conversion cv, *cvp = &cv;
  30         int err;
  31
  32         cvp->channel       = channel;
  33         cvp->amplification = factor;
  34         err = ioctl(fd, VMOD12E16_IOCCONVERT, cvp);
  35         if (err != 0)
  36                 return err;
  37         *value = cvp->data;
  38         return 0;
  39 }
  40
  41 int vmod12e16_close(int fd)
  42 {
  43         return close(fd);
  44 }