LXR linux/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
  27struct 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)
  64extern struct dvb_frontend *rtl2830_attach(
  65        const struct rtl2830_config *config,
  66        struct i2c_adapter *i2c
  67);
  68
  69extern struct i2c_adapter *rtl2830_get_tuner_i2c_adapter(
  70        struct dvb_frontend *fe
  71);
  72#else
  73static 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
  82static 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 */
  91