drivers/media/dvb-frontends/cx24110.h

   1 /*
   2     cx24110 - Single Chip Satellite Channel Receiver driver module
   3
   4     Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@htp-tel.de> based on
   5     work
   6     Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16
  17     GNU General Public License for more details.
  18
  19     You should have received a copy of the GNU General Public License
  20     along with this program; if not, write to the Free Software
  21     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22
  23 */
  24
  25 #ifndef CX24110_H
  26 #define CX24110_H
  27
  28 #include <linux/dvb/frontend.h>
  29
  30 struct cx24110_config
  31 {
  32         /* the demodulator's i2c address */
  33         u8 demod_address;
  34 };
  35
  36 static inline int cx24110_pll_write(struct dvb_frontend *fe, u32 val)
  37 {
  38         u8 buf[] = {
  39                 (u8)((val >> 24) & 0xff),
  40                 (u8)((val >> 16) & 0xff),
  41                 (u8)((val >> 8) & 0xff)
  42         };
  43
  44         if (fe->ops.write)
  45                 return fe->ops.write(fe, buf, 3);
  46         return 0;
  47 }
  48
  49 #if IS_REACHABLE(CONFIG_DVB_CX24110)
  50 extern struct dvb_frontend* cx24110_attach(const struct cx24110_config* config,
  51                                            struct i2c_adapter* i2c);
  52 #else
  53 static inline struct dvb_frontend* cx24110_attach(const struct cx24110_config* config,
  54                                                   struct i2c_adapter* i2c)
  55 {
  56         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  57         return NULL;
  58 }
  59 #endif // CONFIG_DVB_CX24110
  60
  61 #endif // CX24110_H