linux/include/media/si4713.h
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   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 */
  25struct si4713_platform_data {
  26        int gpio_reset; /* < 0 if not used */
  27};
  28
  29/*
  30 * Structure to query for Received Noise Level (RNL).
  31 */
  32struct 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*/
  49
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