drivers/media/dvb-frontends/ix2505v.h

   1 /**
   2  * Driver for Sharp IX2505V (marked B0017) DVB-S silicon tuner
   3  *
   4  * Copyright (C) 2010 Malcolm Priestley
   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 Version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef DVB_IX2505V_H
  17 #define DVB_IX2505V_H
  18
  19 #include <linux/i2c.h>
  20 #include <media/dvb_frontend.h>
  21
  22 /**
  23  * struct ix2505v_config - ix2505 attachment configuration
  24  *
  25  * @tuner_address: tuner address
  26  * @tuner_gain: Baseband AMP gain control 0/1=0dB(default) 2=-2bB 3=-4dB
  27  * @tuner_chargepump: Charge pump output +/- 0=120 1=260 2=555 3=1200(default)
  28  * @min_delay_ms: delay after tune
  29  * @tuner_write_only: disables reads
  30  */
  31 struct ix2505v_config {
  32         u8 tuner_address;
  33         u8 tuner_gain;
  34         u8 tuner_chargepump;
  35         int min_delay_ms;
  36         u8 tuner_write_only;
  37
  38 };
  39
  40 #if IS_REACHABLE(CONFIG_DVB_IX2505V)
  41 /**
  42  * Attach a ix2505v tuner to the supplied frontend structure.
  43  *
  44  * @fe: Frontend to attach to.
  45  * @config: pointer to &struct ix2505v_config
  46  * @i2c: pointer to &struct i2c_adapter.
  47  *
  48  * return: FE pointer on success, NULL on failure.
  49  */
  50 extern struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe,
  51         const struct ix2505v_config *config, struct i2c_adapter *i2c);
  52 #else
  53 static inline struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe,
  54         const struct ix2505v_config *config, struct i2c_adapter *i2c)
  55 {
  56         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  57         return NULL;
  58 }
  59 #endif
  60
  61 #endif /* DVB_IX2505V_H */