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         const char * const *supply_names;
  27         unsigned supplies;
  28         int gpio_reset; /* < 0 if not used */
  29 };
  30
  31 /*
  32  * Structure to query for Received Noise Level (RNL).
  33  */
  34 struct si4713_rnl {
  35         __u32 index;            /* modulator index */
  36         __u32 frequency;        /* frequency to peform rnl measurement */
  37         __s32 rnl;              /* result of measurement in dBuV */
  38         __u32 reserved[4];      /* drivers and apps must init this to 0 */
  39 };
  40
  41 /*
  42  * This is the ioctl number to query for rnl. Users must pass a
  43  * struct si4713_rnl pointer specifying desired frequency in 'frequency' field
  44  * following driver capabilities (i.e V4L2_TUNER_CAP_LOW).
  45  * Driver must return measured value in the same struture, filling 'rnl' field.
  46  */
  47 #define SI4713_IOC_MEASURE_RNL  _IOWR('V', BASE_VIDIOC_PRIVATE + 0, \
  48                                                 struct si4713_rnl)
  49
  50 #endif /* ifndef SI4713_H*/