LXR linux/drivers/media/tuners/tua9001.h

   1/*
   2 * Infineon TUA 9001 silicon tuner driver
   3 *
   4 * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
   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 *    GNU General Public License for more details.
  15 *
  16 *    You should have received a copy of the GNU General Public License along
  17 *    with this program; if not, write to the Free Software Foundation, Inc.,
  18 *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21#ifndef TUA9001_H
  22#define TUA9001_H
  23
  24#include <linux/kconfig.h>
  25#include "dvb_frontend.h"
  26
  27struct tua9001_config {
  28        /*
  29         * I2C address
  30         */
  31        u8 i2c_addr;
  32};
  33
  34/*
  35 * TUA9001 I/O PINs:
  36 *
  37 * CEN - chip enable
  38 * 0 = chip disabled (chip off)
  39 * 1 = chip enabled (chip on)
  40 *
  41 * RESETN - chip reset
  42 * 0 = reset disabled (chip reset off)
  43 * 1 = reset enabled (chip reset on)
  44 *
  45 * RXEN - RX enable
  46 * 0 = RX disabled (chip idle)
  47 * 1 = RX enabled (chip tuned)
  48 */
  49
  50#define TUA9001_CMD_CEN     0
  51#define TUA9001_CMD_RESETN  1
  52#define TUA9001_CMD_RXEN    2
  53
  54#if IS_ENABLED(CONFIG_MEDIA_TUNER_TUA9001)
  55extern struct dvb_frontend *tua9001_attach(struct dvb_frontend *fe,
  56                struct i2c_adapter *i2c, struct tua9001_config *cfg);
  57#else
  58static inline struct dvb_frontend *tua9001_attach(struct dvb_frontend *fe,
  59                struct i2c_adapter *i2c, struct tua9001_config *cfg)
  60{
  61        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  62        return NULL;
  63}
  64#endif
  65
  66#endif
  67