drivers/media/dvb-frontends/cx24120.h

   1 /*
   2  * Conexant CX24120/CX24118 - DVB-S/S2 demod/tuner driver
   3  *
   4  * Copyright (C) 2008 Patrick Boettcher <pb@linuxtv.org>
   5  * Copyright (C) 2009 Sergey Tyurin <forum.free-x.de>
   6  * Updated 2012 by Jannis Achstetter <jannis_achstetter@web.de>
   7  * Copyright (C) 2015 Jemma Denson <jdenson@gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #ifndef CX24120_H
  21 #define CX24120_H
  22
  23 #include <linux/kconfig.h>
  24 #include <linux/dvb/frontend.h>
  25 #include <linux/firmware.h>
  26
  27 struct cx24120_initial_mpeg_config {
  28         u8 x1;
  29         u8 x2;
  30         u8 x3;
  31 };
  32
  33 struct cx24120_config {
  34         u8 i2c_addr;
  35         u32 xtal_khz;
  36         struct cx24120_initial_mpeg_config initial_mpeg_config;
  37
  38         int (*request_firmware)(struct dvb_frontend *fe,
  39                                 const struct firmware **fw, char *name);
  40
  41         /* max bytes I2C provider can write at once */
  42         u16 i2c_wr_max;
  43 };
  44
  45 #if IS_REACHABLE(CONFIG_DVB_CX24120)
  46 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config,
  47                                     struct i2c_adapter *i2c);
  48 #else
  49 static inline
  50 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config,
  51                                     struct i2c_adapter *i2c)
  52 {
  53         pr_warn("%s: driver disabled by Kconfig\n", __func__);
  54         return NULL;
  55 }
  56 #endif
  57
  58 #endif /* CX24120_H */