drivers/media/dvb-frontends/ves1820.h

   1 /*
   2     VES1820  - Single Chip Cable Channel Receiver driver module
   3
   4     Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
   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
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #ifndef VES1820_H
  22 #define VES1820_H
  23
  24 #include <linux/dvb/frontend.h>
  25
  26 #define VES1820_SELAGC_PWM 0
  27 #define VES1820_SELAGC_SIGNAMPERR 1
  28
  29 struct ves1820_config
  30 {
  31         /* the demodulator's i2c address */
  32         u8 demod_address;
  33
  34         /* value of XIN to use */
  35         u32 xin;
  36
  37         /* does inversion need inverted? */
  38         u8 invert:1;
  39
  40         /* SELAGC control */
  41         u8 selagc:1;
  42 };
  43
  44 #if IS_ENABLED(CONFIG_DVB_VES1820)
  45 extern struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
  46                                            struct i2c_adapter* i2c, u8 pwm);
  47 #else
  48 static inline struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
  49                                            struct i2c_adapter* i2c, u8 pwm)
  50 {
  51         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  52         return NULL;
  53 }
  54 #endif // CONFIG_DVB_VES1820
  55
  56 #endif // VES1820_H