1 /*
2  *  Driver for Zarlink DVB-T MT352 demodulator
3  *
4  *  Written by Holger Waechtler <holger@qanu.de>
5  *	 and Daniel Mack <daniel@qanu.de>
6  *
7  *  AVerMedia AVerTV DVB-T 771 support by
8  *       Wolfram Joost <dbox2@frokaschwei.de>
9  *
10  *  Support for Samsung TDTC9251DH01C(M) tuner
11  *  Copyright (C) 2004 Antonio Mancuso <antonio.mancuso@digitaltelevision.it>
12  *                     Amauri  Celani  <acelani@essegi.net>
13  *
14  *  DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by
15  *       Christopher Pascoe <c.pascoe@itee.uq.edu.au>
16  *
17  *  This program is free software; you can redistribute it and/or modify
18  *  it under the terms of the GNU General Public License as published by
19  *  the Free Software Foundation; either version 2 of the License, or
20  *  (at your option) any later version.
21  *
22  *  This program is distributed in the hope that it will be useful,
23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  *
26  *  GNU General Public License for more details.
27  */
28 
29 #ifndef MT352_H
30 #define MT352_H
31 
32 #include <linux/dvb/frontend.h>
33 
34 struct mt352_config
35 {
36 	/* the demodulator's i2c address */
37 	u8 demod_address;
38 
39 	/* frequencies in kHz */
40 	int adc_clock;  // default: 20480
41 	int if2;        // default: 36166
42 
43 	/* set if no pll is connected to the secondary i2c bus */
44 	int no_tuner;
45 
46 	/* Initialise the demodulator and PLL. Cannot be NULL */
47 	int (*demod_init)(struct dvb_frontend* fe);
48 };
49 
50 #if IS_REACHABLE(CONFIG_DVB_MT352)
51 extern struct dvb_frontend* mt352_attach(const struct mt352_config* config,
52 					 struct i2c_adapter* i2c);
53 #else
54 static inline struct dvb_frontend* mt352_attach(const struct mt352_config* config,
55 					 struct i2c_adapter* i2c)
56 {
57 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
58 	return NULL;
59 }
60 #endif // CONFIG_DVB_MT352
61 
62 static inline int mt352_write(struct dvb_frontend *fe, const u8 buf[], int len) {
63 	int r = 0;
64 	if (fe->ops.write)
65 		r = fe->ops.write(fe, buf, len);
66 	return r;
67 }
68 
69 #endif // MT352_H
70