drivers/media/common/tuners/xc4000.h

   1 /*
   2  *  Driver for Xceive XC4000 "QAM/8VSB single chip tuner"
   3  *
   4  *  Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #ifndef __XC4000_H__
  23 #define __XC4000_H__
  24
  25 #include <linux/firmware.h>
  26
  27 struct dvb_frontend;
  28 struct i2c_adapter;
  29
  30 struct xc4000_config {
  31         u8      i2c_address;
  32         u32     if_khz;
  33 };
  34
  35 /* xc4000 callback command */
  36 #define XC4000_TUNER_RESET              0
  37
  38 /* For each bridge framework, when it attaches either analog or digital,
  39  * it has to store a reference back to its _core equivalent structure,
  40  * so that it can service the hardware by steering gpio's etc.
  41  * Each bridge implementation is different so cast devptr accordingly.
  42  * The xc4000 driver cares not for this value, other than ensuring
  43  * it's passed back to a bridge during tuner_callback().
  44  */
  45
  46 #if defined(CONFIG_MEDIA_TUNER_XC4000) || \
  47     (defined(CONFIG_MEDIA_TUNER_XC4000_MODULE) && defined(MODULE))
  48 extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  49                                           struct i2c_adapter *i2c,
  50                                           struct xc4000_config *cfg);
  51 #else
  52 static inline struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  53                                                  struct i2c_adapter *i2c,
  54                                                  struct xc4000_config *cfg)
  55 {
  56         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  57         return NULL;
  58 }
  59 #endif
  60
  61 #endif