text: /*
   *  Driver for Xceive XC4000 "QAM/8VSB single chip tuner"
   *
   *  Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   */
  
  #ifndef __XC4000_H__
  #define __XC4000_H__
  
  #include <linux/firmware.h>
  
  struct dvb_frontend;
  struct i2c_adapter;
  
  struct xc4000_config {
  	u8	i2c_address;
  	/* if non-zero, power management is enabled by default */
  	u8	default_pm;
  	/* value to be written to XREG_AMPLITUDE in DVB-T mode (0: no write) */
  	u8	dvb_amplitude;
  	/* if non-zero, register 0x0E is set to filter analog TV video output */
  	u8	set_smoothedcvbs;
  	/* IF for DVB-T */
  	u32	if_khz;
  };
  
  /* xc4000 callback command */
  #define XC4000_TUNER_RESET		0
  
  /* For each bridge framework, when it attaches either analog or digital,
   * it has to store a reference back to its _core equivalent structure,
   * so that it can service the hardware by steering gpio's etc.
   * Each bridge implementation is different so cast devptr accordingly.
   * The xc4000 driver cares not for this value, other than ensuring
   * it's passed back to a bridge during tuner_callback().
   */
  
  #if IS_ENABLED(CONFIG_MEDIA_TUNER_XC4000)
  extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  					  struct i2c_adapter *i2c,
  					  struct xc4000_config *cfg);
  #else
  static inline struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  						 struct i2c_adapter *i2c,
  						 struct xc4000_config *cfg)
  {
  	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  	return NULL;
  }
  #endif
  
  #endif
  