drivers/media/dvb-frontends/ascot2e.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * ascot2e.h
   4  *
   5  * Sony Ascot3E DVB-T/T2/C/C2 tuner driver
   6  *
   7  * Copyright 2012 Sony Corporation
   8  * Copyright (C) 2014 NetUP Inc.
   9  * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
  10  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
  11   */
  12
  13 #ifndef __DVB_ASCOT2E_H__
  14 #define __DVB_ASCOT2E_H__
  15
  16 #include <linux/dvb/frontend.h>
  17 #include <linux/i2c.h>
  18
  19 /**
  20  * struct ascot2e_config - the configuration of Ascot2E tuner driver
  21  * @i2c_address:        I2C address of the tuner
  22  * @xtal_freq_mhz:      Oscillator frequency, MHz
  23  * @set_tuner_priv:     Callback function private context
  24  * @set_tuner_callback: Callback function that notifies the parent driver
  25  *                      which tuner is active now
  26  */
  27 struct ascot2e_config {
  28         u8      i2c_address;
  29         u8      xtal_freq_mhz;
  30         void    *set_tuner_priv;
  31         int     (*set_tuner_callback)(void *, int);
  32 };
  33
  34 #if IS_REACHABLE(CONFIG_DVB_ASCOT2E)
  35 /**
  36  * ascot2e_attach - Attach an ascot2e tuner
  37  *
  38  * @fe: frontend to be attached
  39  * @config: pointer to &struct ascot2e_config with tuner configuration.
  40  * @i2c: i2c adapter to use.
  41  *
  42  * return: FE pointer on success, NULL on failure.
  43  */
  44 extern struct dvb_frontend *ascot2e_attach(struct dvb_frontend *fe,
  45                                         const struct ascot2e_config *config,
  46                                         struct i2c_adapter *i2c);
  47 #else
  48 static inline struct dvb_frontend *ascot2e_attach(struct dvb_frontend *fe,
  49                                         const struct ascot2e_config *config,
  50                                         struct i2c_adapter *i2c)
  51 {
  52         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  53         return NULL;
  54 }
  55 #endif
  56
  57 #endif