vmod/driver/vmod12e16drvr.h

   1 /**
   2  * @file vmod12e16drvr.h
   3  *
   4  * @brief VMOD12E16 driver interface
   5  *
   6  * The VMOD12E16 mezzanine is a 12-bit resolution, 16 channel ADC for
   7  * which this driver provides support if installed in a modulbus carrier
   8  * board. So this file provides definitions for easy access to hardware
   9  * register on both VMODIO/MOD-PCI carrier and VMOD12E16
  10  *
  11  * Copyright (c) 2009,2010 CERN
  12  * @author Juan David Gonzalez Cobas <dcobas@cern.ch>
  13  *
  14  * @section license_sec License
  15  * Released under the GPL v2. (and only v2, not any later version)
  16  */
  17
  18 #ifndef _VMOD12E16DRVR_H_
  19 #define _VMOD12E16DRVR_H_
  20
  21 #include <linux/types.h>
  22 #include <linux/ioctl.h>
  23
  24 /**
  25  * @brief  user argument  for ioctl VMOD12E16_IOCCONVERT
  26  * defining channel, amplification factor, and the data to get in return
  27  */
  28 struct vmod12e16_conversion {
  29         int amplification;      /**< amplification factor (0..3 for 1, 10, 100 or 1000 amplification) */
  30         int channel;            /**< analog channel to convert from (0..15) */
  31         int data;               /**< digital value after conversion     */
  32 };
  33
  34 /* IOCTLS for this driver */
  35 #define VMOD12E16_IOCMAGIC      'm'
  36 #define VMOD12E16_IOCSELECT     _IOW (VMOD12E16_IOCMAGIC, 1, struct vmod12e16_state)
  37 #define VMOD12E16_IOCCONVERT    _IOWR(VMOD12E16_IOCMAGIC, 2, struct vmod12e16_conversion)
  38
  39 #endif /* _VMOD12E16DRVR_H_ */