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/dvb/frontend.h>
  24 #include <linux/firmware.h>
  25
  26 struct cx24120_initial_mpeg_config {
  27         u8 x1;
  28         u8 x2;
  29         u8 x3;
  30 };
  31
  32 struct cx24120_config {
  33         u8 i2c_addr;
  34         u32 xtal_khz;
  35         struct cx24120_initial_mpeg_config initial_mpeg_config;
  36
  37         int (*request_firmware)(struct dvb_frontend *fe,
  38                                 const struct firmware **fw, char *name);
  39
  40         /* max bytes I2C provider can write at once */
  41         u16 i2c_wr_max;
  42 };
  43
  44 #if IS_REACHABLE(CONFIG_DVB_CX24120)
  45 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config,
  46                                     struct i2c_adapter *i2c);
  47 #else
  48 static inline
  49 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config,
  50                                     struct i2c_adapter *i2c)
  51 {
  52         pr_warn("%s: driver disabled by Kconfig\n", __func__);
  53         return NULL;
  54 }
  55 #endif
  56
  57 #endif /* CX24120_H */