drivers/media/dvb-frontends/si2165.h

   1 /*
   2     Driver for Silicon Labs SI2165 DVB-C/-T Demodulator
   3
   4     Copyright (C) 2013-2014 Matthias Schwarzott <zzam@gentoo.org>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     References:
  17     http://www.silabs.com/Support%20Documents/TechnicalDocs/Si2165-short.pdf
  18 */
  19
  20 #ifndef _DVB_SI2165_H
  21 #define _DVB_SI2165_H
  22
  23 #include <linux/dvb/frontend.h>
  24
  25 enum {
  26         SI2165_MODE_OFF = 0x00,
  27         SI2165_MODE_PLL_EXT = 0x20,
  28         SI2165_MODE_PLL_XTAL = 0x21
  29 };
  30
  31 struct si2165_config {
  32         /* i2c addr
  33          * possible values: 0x64,0x65,0x66,0x67 */
  34         u8 i2c_addr;
  35
  36         /* external clock or XTAL */
  37         u8 chip_mode;
  38
  39         /* frequency of external clock or xtal in Hz
  40          * possible values: 4000000, 16000000, 20000000, 240000000, 27000000
  41          */
  42         u32 ref_freq_Hz;
  43
  44         /* invert the spectrum */
  45         bool inversion;
  46 };
  47
  48 #if IS_REACHABLE(CONFIG_DVB_SI2165)
  49 struct dvb_frontend *si2165_attach(
  50         const struct si2165_config *config,
  51         struct i2c_adapter *i2c);
  52 #else
  53 static inline struct dvb_frontend *si2165_attach(
  54         const struct si2165_config *config,
  55         struct i2c_adapter *i2c)
  56 {
  57         pr_warn("%s: driver disabled by Kconfig\n", __func__);
  58         return NULL;
  59 }
  60 #endif /* CONFIG_DVB_SI2165 */
  61
  62 #endif /* _DVB_SI2165_H */