LXR linux/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
  18#ifndef __XC4000_H__
  19#define __XC4000_H__
  20
  21#include <linux/firmware.h>
  22
  23struct dvb_frontend;
  24struct i2c_adapter;
  25
  26struct xc4000_config {
  27        u8      i2c_address;
  28        /* if non-zero, power management is enabled by default */
  29        u8      default_pm;
  30        /* value to be written to XREG_AMPLITUDE in DVB-T mode (0: no write) */
  31        u8      dvb_amplitude;
  32        /* if non-zero, register 0x0E is set to filter analog TV video output */
  33        u8      set_smoothedcvbs;
  34        /* IF for DVB-T */
  35        u32     if_khz;
  36};
  37
  38/* xc4000 callback command */
  39#define XC4000_TUNER_RESET              0
  40
  41/* For each bridge framework, when it attaches either analog or digital,
  42 * it has to store a reference back to its _core equivalent structure,
  43 * so that it can service the hardware by steering gpio's etc.
  44 * Each bridge implementation is different so cast devptr accordingly.
  45 * The xc4000 driver cares not for this value, other than ensuring
  46 * it's passed back to a bridge during tuner_callback().
  47 */
  48
  49#if IS_REACHABLE(CONFIG_MEDIA_TUNER_XC4000)
  50extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  51                                          struct i2c_adapter *i2c,
  52                                          struct xc4000_config *cfg);
  53#else
  54static inline struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  55                                                 struct i2c_adapter *i2c,
  56                                                 struct xc4000_config *cfg)
  57{
  58        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  59        return NULL;
  60}
  61#endif
  62
  63#endif
  64