drivers/media/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         /* if non-zero, power management is enabled by default */
  33         u8      default_pm;
  34         /* value to be written to XREG_AMPLITUDE in DVB-T mode (0: no write) */
  35         u8      dvb_amplitude;
  36         /* if non-zero, register 0x0E is set to filter analog TV video output */
  37         u8      set_smoothedcvbs;
  38         /* IF for DVB-T */
  39         u32     if_khz;
  40 };
  41
  42 /* xc4000 callback command */
  43 #define XC4000_TUNER_RESET              0
  44
  45 /* For each bridge framework, when it attaches either analog or digital,
  46  * it has to store a reference back to its _core equivalent structure,
  47  * so that it can service the hardware by steering gpio's etc.
  48  * Each bridge implementation is different so cast devptr accordingly.
  49  * The xc4000 driver cares not for this value, other than ensuring
  50  * it's passed back to a bridge during tuner_callback().
  51  */
  52
  53 #if IS_REACHABLE(CONFIG_MEDIA_TUNER_XC4000)
  54 extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  55                                           struct i2c_adapter *i2c,
  56                                           struct xc4000_config *cfg);
  57 #else
  58 static inline struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  59                                                  struct i2c_adapter *i2c,
  60                                                  struct xc4000_config *cfg)
  61 {
  62         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  63         return NULL;
  64 }
  65 #endif
  66
  67 #endif