1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *  Driver for Zarlink DVB-T MT352 demodulator
4 *
5 *  Written by Holger Waechtler <holger@qanu.de>
6 *	 and Daniel Mack <daniel@qanu.de>
7 *
8 *  AVerMedia AVerTV DVB-T 771 support by
9 *       Wolfram Joost <dbox2@frokaschwei.de>
10 *
11 *  Support for Samsung TDTC9251DH01C(M) tuner
12 *  Copyright (C) 2004 Antonio Mancuso <antonio.mancuso@digitaltelevision.it>
13 *                     Amauri  Celani  <acelani@essegi.net>
14 *
15 *  DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by
16 *       Christopher Pascoe <c.pascoe@itee.uq.edu.au>
17 */
18
19#ifndef MT352_H
20#define MT352_H
21
22#include <linux/dvb/frontend.h>
23
24struct mt352_config
25{
26	/* the demodulator's i2c address */
27	u8 demod_address;
28
29	/* frequencies in kHz */
30	int adc_clock;  // default: 20480
31	int if2;        // default: 36166
32
33	/* set if no pll is connected to the secondary i2c bus */
34	int no_tuner;
35
36	/* Initialise the demodulator and PLL. Cannot be NULL */
37	int (*demod_init)(struct dvb_frontend* fe);
38};
39
40#if IS_REACHABLE(CONFIG_DVB_MT352)
41extern struct dvb_frontend* mt352_attach(const struct mt352_config* config,
42					 struct i2c_adapter* i2c);
43#else
44static inline struct dvb_frontend* mt352_attach(const struct mt352_config* config,
45					 struct i2c_adapter* i2c)
46{
47	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
48	return NULL;
49}
50#endif // CONFIG_DVB_MT352
51
52static inline int mt352_write(struct dvb_frontend *fe, const u8 buf[], int len) {
53	int r = 0;
54	if (fe->ops.write)
55		r = fe->ops.write(fe, buf, len);
56	return r;
57}
58
59#endif // MT352_H
60