1 /*
2  * helene.h
3  *
4  * Sony HELENE DVB-S/S2/T/T2/C/C2/ISDB-T/S tuner driver (CXD2858ER)
5  *
6  * Copyright 2012 Sony Corporation
7  * Copyright (C) 2014 NetUP Inc.
8  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19   */
20 
21 #ifndef __DVB_HELENE_H__
22 #define __DVB_HELENE_H__
23 
24 #include <linux/dvb/frontend.h>
25 #include <linux/i2c.h>
26 
27 enum helene_xtal {
28 	SONY_HELENE_XTAL_16000, /* 16 MHz */
29 	SONY_HELENE_XTAL_20500, /* 20.5 MHz */
30 	SONY_HELENE_XTAL_24000, /* 24 MHz */
31 	SONY_HELENE_XTAL_41000 /* 41 MHz */
32 };
33 
34 /**
35  * struct helene_config - the configuration of 'Helene' tuner driver
36  * @i2c_address:	I2C address of the tuner
37  * @xtal_freq_mhz:	Oscillator frequency, MHz
38  * @set_tuner_priv:	Callback function private context
39  * @set_tuner_callback:	Callback function that notifies the parent driver
40  *			which tuner is active now
41  * @xtal: Cristal frequency as described by &enum helene_xtal
42  */
43 struct helene_config {
44 	u8	i2c_address;
45 	u8	xtal_freq_mhz;
46 	void	*set_tuner_priv;
47 	int	(*set_tuner_callback)(void *, int);
48 	enum helene_xtal xtal;
49 };
50 
51 #if IS_REACHABLE(CONFIG_DVB_HELENE)
52 /**
53  * Attach a helene tuner (terrestrial and cable standards)
54  *
55  * @fe: frontend to be attached
56  * @config: pointer to &struct helene_config with tuner configuration.
57  * @i2c: i2c adapter to use.
58  *
59  * return: FE pointer on success, NULL on failure.
60  */
61 extern struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
62 					const struct helene_config *config,
63 					struct i2c_adapter *i2c);
64 
65 /**
66  * Attach a helene tuner (satellite standards)
67  *
68  * @fe: frontend to be attached
69  * @config: pointer to &struct helene_config with tuner configuration.
70  * @i2c: i2c adapter to use.
71  *
72  * return: FE pointer on success, NULL on failure.
73  */
74 extern struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
75 					const struct helene_config *config,
76 					struct i2c_adapter *i2c);
77 #else
78 static inline struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
79 					const struct helene_config *config,
80 					struct i2c_adapter *i2c)
81 {
82 	pr_warn("%s: driver disabled by Kconfig\n", __func__);
83 	return NULL;
84 }
85 static inline struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
86 					const struct helene_config *config,
87 					struct i2c_adapter *i2c)
88 {
89 	pr_warn("%s: driver disabled by Kconfig\n", __func__);
90 	return NULL;
91 }
92 #endif
93 
94 #endif
95