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
mt352_attach(const struct mt352_config * config,struct i2c_adapter * i2c)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
mt352_write(struct dvb_frontend * fe,const u8 buf[],int len)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