drivers/media/dvb-frontends/mt352.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Driver for Zarlink DVB-T MT352 demodulator
   4  *
   5  *  Written by Holger Waechtler <holger@qanu.de>
   6  *       and Daniel Mack <daniel@qanu.de>
   7  *
   8  *  AVerMedia AVerTV DVB-T 771 support by
   9  *       Wolfram Joost <dbox2@frokaschwei.de>
  10  *
  11  *  Support for Samsung TDTC9251DH01C(M) tuner
  12  *  Copyright (C) 2004 Antonio Mancuso <antonio.mancuso@digitaltelevision.it>
  13  *                     Amauri  Celani  <acelani@essegi.net>
  14  *
  15  *  DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by
  16  *       Christopher Pascoe <c.pascoe@itee.uq.edu.au>
  17  */
  18
  19 #ifndef MT352_H
  20 #define MT352_H
  21
  22 #include <linux/dvb/frontend.h>
  23
  24 struct mt352_config
  25 {
  26         /* the demodulator's i2c address */
  27         u8 demod_address;
  28
  29         /* frequencies in kHz */
  30         int adc_clock;  // default: 20480
  31         int if2;        // default: 36166
  32
  33         /* set if no pll is connected to the secondary i2c bus */
  34         int no_tuner;
  35
  36         /* Initialise the demodulator and PLL. Cannot be NULL */
  37         int (*demod_init)(struct dvb_frontend* fe);
  38 };
  39
  40 #if IS_REACHABLE(CONFIG_DVB_MT352)
  41 extern struct dvb_frontend* mt352_attach(const struct mt352_config* config,
  42                                          struct i2c_adapter* i2c);
  43 #else
  44 static inline struct dvb_frontend* mt352_attach(const struct mt352_config* config,
  45                                          struct i2c_adapter* i2c)
  46 {
  47         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  48         return NULL;
  49 }
  50 #endif // CONFIG_DVB_MT352
  51
  52 static inline int mt352_write(struct dvb_frontend *fe, const u8 buf[], int len) {
  53         int r = 0;
  54         if (fe->ops.write)
  55                 r = fe->ops.write(fe, buf, len);
  56         return r;
  57 }
  58
  59 #endif // MT352_H