drivers/media/dvb-frontends/ascot2e.h

   1 /*
   2  * ascot2e.h
   3  *
   4  * Sony Ascot3E DVB-T/T2/C/C2 tuner driver
   5  *
   6  * Copyright 2012 Sony Corporation
   7  * Copyright (C) 2014 NetUP Inc.
   8  * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
   9  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20   */
  21
  22 #ifndef __DVB_ASCOT2E_H__
  23 #define __DVB_ASCOT2E_H__
  24
  25 #include <linux/dvb/frontend.h>
  26 #include <linux/i2c.h>
  27
  28 /**
  29  * struct ascot2e_config - the configuration of Ascot2E tuner driver
  30  * @i2c_address:        I2C address of the tuner
  31  * @xtal_freq_mhz:      Oscillator frequency, MHz
  32  * @set_tuner_priv:     Callback function private context
  33  * @set_tuner_callback: Callback function that notifies the parent driver
  34  *                      which tuner is active now
  35  */
  36 struct ascot2e_config {
  37         u8      i2c_address;
  38         u8      xtal_freq_mhz;
  39         void    *set_tuner_priv;
  40         int     (*set_tuner_callback)(void *, int);
  41 };
  42
  43 #if IS_REACHABLE(CONFIG_DVB_ASCOT2E)
  44 /**
  45  * Attach an ascot2e tuner
  46  *
  47  * @fe: frontend to be attached
  48  * @config: pointer to &struct ascot2e_config with tuner configuration.
  49  * @i2c: i2c adapter to use.
  50  *
  51  * return: FE pointer on success, NULL on failure.
  52  */
  53 extern struct dvb_frontend *ascot2e_attach(struct dvb_frontend *fe,
  54                                         const struct ascot2e_config *config,
  55                                         struct i2c_adapter *i2c);
  56 #else
  57 static inline struct dvb_frontend *ascot2e_attach(struct dvb_frontend *fe,
  58                                         const struct ascot2e_config *config,
  59                                         struct i2c_adapter *i2c)
  60 {
  61         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  62         return NULL;
  63 }
  64 #endif
  65
  66 #endif