drivers/media/dvb-frontends/rtl2830.h

   1 /*
   2  * Realtek RTL2830 DVB-T demodulator driver
   3  *
   4  * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
   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  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #ifndef RTL2830_H
  22 #define RTL2830_H
  23
  24 #include <linux/kconfig.h>
  25 #include <linux/dvb/frontend.h>
  26
  27 struct rtl2830_config {
  28         /*
  29          * Demodulator I2C address.
  30          */
  31         u8 i2c_addr;
  32
  33         /*
  34          * Xtal frequency.
  35          * Hz
  36          * 4000000, 16000000, 25000000, 28800000
  37          */
  38         u32 xtal;
  39
  40         /*
  41          * TS output mode.
  42          */
  43         u8 ts_mode;
  44
  45         /*
  46          * Spectrum inversion.
  47          */
  48         bool spec_inv;
  49
  50         /*
  51          */
  52         u8 vtop;
  53
  54         /*
  55          */
  56         u8 krf;
  57
  58         /*
  59          */
  60         u8 agc_targ_val;
  61 };
  62
  63 #if IS_ENABLED(CONFIG_DVB_RTL2830)
  64 extern struct dvb_frontend *rtl2830_attach(
  65         const struct rtl2830_config *config,
  66         struct i2c_adapter *i2c
  67 );
  68
  69 extern struct i2c_adapter *rtl2830_get_tuner_i2c_adapter(
  70         struct dvb_frontend *fe
  71 );
  72 #else
  73 static inline struct dvb_frontend *rtl2830_attach(
  74         const struct rtl2830_config *config,
  75         struct i2c_adapter *i2c
  76 )
  77 {
  78         pr_warn("%s: driver disabled by Kconfig\n", __func__);
  79         return NULL;
  80 }
  81
  82 static inline struct i2c_adapter *rtl2830_get_tuner_i2c_adapter(
  83         struct dvb_frontend *fe
  84 )
  85 {
  86         return NULL;
  87 }
  88 #endif
  89
  90 #endif /* RTL2830_H */