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 *  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
  27struct dvb_frontend;
  28struct i2c_adapter;
  29
  30struct 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_ENABLED(CONFIG_MEDIA_TUNER_XC4000)
  54extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
  55                                          struct i2c_adapter *i2c,
  56                                          struct xc4000_config *cfg);
  57#else
  58static 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
  68