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mt352.h
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1 /*
2  * Driver for Zarlink DVB-T MT352 demodulator
3  *
4  * Written by Holger Waechtler <[email protected]>
5  * and Daniel Mack <[email protected]>
6  *
7  * AVerMedia AVerTV DVB-T 771 support by
8  * Wolfram Joost <[email protected]>
9  *
10  * Support for Samsung TDTC9251DH01C(M) tuner
11  * Copyright (C) 2004 Antonio Mancuso <[email protected]>
12  * Amauri Celani <[email protected]>
13  *
14  * DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by
15  * Christopher Pascoe <[email protected]>
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  * You should have received a copy of the GNU General Public License
29  * along with this program; if not, write to the Free Software
30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
31  */
32 
33 #ifndef MT352_H
34 #define MT352_H
35 
36 #include <linux/dvb/frontend.h>
37 
39 {
40  /* the demodulator's i2c address */
42 
43  /* frequencies in kHz */
44  int adc_clock; // default: 20480
45  int if2; // default: 36166
46 
47  /* set if no pll is connected to the secondary i2c bus */
48  int no_tuner;
49 
50  /* Initialise the demodulator and PLL. Cannot be NULL */
51  int (*demod_init)(struct dvb_frontend* fe);
52 };
53 
54 #if defined(CONFIG_DVB_MT352) || (defined(CONFIG_DVB_MT352_MODULE) && defined(MODULE))
55 extern struct dvb_frontend* mt352_attach(const struct mt352_config* config,
56  struct i2c_adapter* i2c);
57 #else
58 static inline struct dvb_frontend* mt352_attach(const struct mt352_config* config,
59  struct i2c_adapter* i2c)
60 {
61  printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
62  return NULL;
63 }
64 #endif // CONFIG_DVB_MT352
65 
66 static inline int mt352_write(struct dvb_frontend *fe, const u8 buf[], int len) {
67  int r = 0;
68  if (fe->ops.write)
69  r = fe->ops.write(fe, buf, len);
70  return r;
71 }
72 
73 #endif // MT352_H