xref: /linux/drivers/media/dvb-frontends/ascot2e.h (revision 3ad0876554cafa368f574d4d408468510543e9ff)
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
67