LXR linux/drivers/media/tuners/tda827x.h

   1  /*
   2     DVB Driver for Philips tda827x / tda827xa Silicon tuners
   3
   4     (c) 2005 Hartmut Hackmann
   5     (c) 2007 Michael Krufky
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22  */
  23
  24#ifndef __DVB_TDA827X_H__
  25#define __DVB_TDA827X_H__
  26
  27#include <linux/i2c.h>
  28#include "dvb_frontend.h"
  29#include "tda8290.h"
  30
  31struct tda827x_config
  32{
  33        /* saa7134 - provided callbacks */
  34        int (*init) (struct dvb_frontend *fe);
  35        int (*sleep) (struct dvb_frontend *fe);
  36
  37        /* interface to tda829x driver */
  38        enum tda8290_lna config;
  39        int          switch_addr;
  40
  41        void (*agcf)(struct dvb_frontend *fe);
  42};
  43
  44
  45/**
  46 * Attach a tda827x tuner to the supplied frontend structure.
  47 *
  48 * @param fe Frontend to attach to.
  49 * @param addr i2c address of the tuner.
  50 * @param i2c i2c adapter to use.
  51 * @param cfg optional callback function pointers.
  52 * @return FE pointer on success, NULL on failure.
  53 */
  54#if IS_REACHABLE(CONFIG_MEDIA_TUNER_TDA827X)
  55extern struct dvb_frontend* tda827x_attach(struct dvb_frontend *fe, int addr,
  56                                           struct i2c_adapter *i2c,
  57                                           struct tda827x_config *cfg);
  58#else
  59static inline struct dvb_frontend* tda827x_attach(struct dvb_frontend *fe,
  60                                                  int addr,
  61                                                  struct i2c_adapter *i2c,
  62                                                  struct tda827x_config *cfg)
  63{
  64        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  65        return NULL;
  66}
  67#endif // CONFIG_MEDIA_TUNER_TDA827X
  68
  69#endif // __DVB_TDA827X_H__
  70