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 |
60 | |