include/media/si4713.h

   1 /*
   2  * include/media/si4713.h
   3  *
   4  * Board related data definitions for Si4713 i2c device driver.
   5  *
   6  * Copyright (c) 2009 Nokia Corporation
   7  * Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
   8  *
   9  * This file is licensed under the terms of the GNU General Public License
  10  * version 2. This program is licensed "as is" without any warranty of any
  11  * kind, whether express or implied.
  12  *
  13  */
  14
  15 #ifndef SI4713_H
  16 #define SI4713_H
  17
  18 /* The SI4713 I2C sensor chip has a fixed slave address of 0xc6 or 0x22. */
  19 #define SI4713_I2C_ADDR_BUSEN_HIGH      0x63
  20 #define SI4713_I2C_ADDR_BUSEN_LOW       0x11
  21
  22 /*
  23  * Platform dependent definition
  24  */
  25 struct si4713_platform_data {
  26         bool is_platform_device;
  27 };
  28
  29 /*
  30  * Structure to query for Received Noise Level (RNL).
  31  */
  32 struct si4713_rnl {
  33         __u32 index;            /* modulator index */
  34         __u32 frequency;        /* frequency to peform rnl measurement */
  35         __s32 rnl;              /* result of measurement in dBuV */
  36         __u32 reserved[4];      /* drivers and apps must init this to 0 */
  37 };
  38
  39 /*
  40  * This is the ioctl number to query for rnl. Users must pass a
  41  * struct si4713_rnl pointer specifying desired frequency in 'frequency' field
  42  * following driver capabilities (i.e V4L2_TUNER_CAP_LOW).
  43  * Driver must return measured value in the same struture, filling 'rnl' field.
  44  */
  45 #define SI4713_IOC_MEASURE_RNL  _IOWR('V', BASE_VIDIOC_PRIVATE + 0, \
  46                                                 struct si4713_rnl)
  47
  48 #endif /* ifndef SI4713_H*/