drivers/media/dvb-frontends/mt352.h

   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
  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
  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