1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * helene.h
4  *
5  * Sony HELENE DVB-S/S2/T/T2/C/C2/ISDB-T/S tuner driver (CXD2858ER)
6  *
7  * Copyright 2012 Sony Corporation
8  * Copyright (C) 2014 NetUP Inc.
9  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
10   */
11 
12 #ifndef __DVB_HELENE_H__
13 #define __DVB_HELENE_H__
14 
15 #include <linux/dvb/frontend.h>
16 #include <linux/i2c.h>
17 
18 enum helene_xtal {
19 	SONY_HELENE_XTAL_16000, /* 16 MHz */
20 	SONY_HELENE_XTAL_20500, /* 20.5 MHz */
21 	SONY_HELENE_XTAL_24000, /* 24 MHz */
22 	SONY_HELENE_XTAL_41000 /* 41 MHz */
23 };
24 
25 /**
26  * struct helene_config - the configuration of 'Helene' tuner driver
27  * @i2c_address:	I2C address of the tuner
28  * @xtal_freq_mhz:	Oscillator frequency, MHz
29  * @set_tuner_priv:	Callback function private context
30  * @set_tuner_callback:	Callback function that notifies the parent driver
31  *			which tuner is active now
32  * @xtal: Cristal frequency as described by &enum helene_xtal
33  * @fe: Frontend for which connects this tuner
34  */
35 struct helene_config {
36 	u8	i2c_address;
37 	u8	xtal_freq_mhz;
38 	void	*set_tuner_priv;
39 	int	(*set_tuner_callback)(void *, int);
40 	enum helene_xtal xtal;
41 
42 	struct dvb_frontend *fe;
43 };
44 
45 #if IS_REACHABLE(CONFIG_DVB_HELENE)
46 /**
47  * Attach a helene tuner (terrestrial and cable standards)
48  *
49  * @fe: frontend to be attached
50  * @config: pointer to &struct helene_config with tuner configuration.
51  * @i2c: i2c adapter to use.
52  *
53  * return: FE pointer on success, NULL on failure.
54  */
55 extern struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
56 					const struct helene_config *config,
57 					struct i2c_adapter *i2c);
58 
59 /**
60  * Attach a helene tuner (satellite standards)
61  *
62  * @fe: frontend to be attached
63  * @config: pointer to &struct helene_config with tuner configuration.
64  * @i2c: i2c adapter to use.
65  *
66  * return: FE pointer on success, NULL on failure.
67  */
68 extern struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
69 					const struct helene_config *config,
70 					struct i2c_adapter *i2c);
71 #else
72 static inline struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
73 					const struct helene_config *config,
74 					struct i2c_adapter *i2c)
75 {
76 	pr_warn("%s: driver disabled by Kconfig\n", __func__);
77 	return NULL;
78 }
79 static inline struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
80 					const struct helene_config *config,
81 					struct i2c_adapter *i2c)
82 {
83 	pr_warn("%s: driver disabled by Kconfig\n", __func__);
84 	return NULL;
85 }
86 #endif
87 
88 #endif
89