xref: /linux/drivers/media/dvb-frontends/ves1820.h (revision c4ee0af3fa0dc65f690fc908f02b8355f9576ea0)
1 /*
2     VES1820  - Single Chip Cable Channel Receiver driver module
3 
4     Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
5 
6     This program is free software; you can redistribute it and/or modify
7     it under the terms of the GNU General Public License as published by
8     the Free Software Foundation; either version 2 of the License, or
9     (at your option) any later version.
10 
11     This program is distributed in the hope that it will be useful,
12     but WITHOUT ANY WARRANTY; without even the implied warranty of
13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14     GNU General Public License for more details.
15 
16     You should have received a copy of the GNU General Public License
17     along with this program; if not, write to the Free Software
18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20 
21 #ifndef VES1820_H
22 #define VES1820_H
23 
24 #include <linux/dvb/frontend.h>
25 
26 #define VES1820_SELAGC_PWM 0
27 #define VES1820_SELAGC_SIGNAMPERR 1
28 
29 struct ves1820_config
30 {
31 	/* the demodulator's i2c address */
32 	u8 demod_address;
33 
34 	/* value of XIN to use */
35 	u32 xin;
36 
37 	/* does inversion need inverted? */
38 	u8 invert:1;
39 
40 	/* SELAGC control */
41 	u8 selagc:1;
42 };
43 
44 #if IS_ENABLED(CONFIG_DVB_VES1820)
45 extern struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
46 					   struct i2c_adapter* i2c, u8 pwm);
47 #else
48 static inline struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
49 					   struct i2c_adapter* i2c, u8 pwm)
50 {
51 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
52 	return NULL;
53 }
54 #endif // CONFIG_DVB_VES1820
55 
56 #endif // VES1820_H
57