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
24 struct 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)
41 extern struct dvb_frontend* mt352_attach(const struct mt352_config* config,
42 struct i2c_adapter* i2c);
43 #else
44 static 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
52 static 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