root/drivers/media/dvb-frontends/tdhd1.h

INCLUDED FROM

DEFINITIONS

1. alps_tdhd1_204a_tuner_set_params

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * tdhd1.h - ALPS TDHD1-204A tuner support
   4  *
   5  * Copyright (C) 2008 Oliver Endriss <o.endriss@gmx.de>
   6  *
   7  * The project's page is at https://linuxtv.org
   8  */
   9 
  10 #ifndef TDHD1_H
  11 #define TDHD1_H
  12 
  13 #include "tda1004x.h"
  14 
  15 static int alps_tdhd1_204_request_firmware(struct dvb_frontend *fe, const struct firmware **fw, char *name);
  16 
  17 static struct tda1004x_config alps_tdhd1_204a_config = {
  18         .demod_address = 0x8,
  19         .invert = 1,
  20         .invert_oclk = 0,
  21         .xtal_freq = TDA10046_XTAL_4M,
  22         .agc_config = TDA10046_AGC_DEFAULT,
  23         .if_freq = TDA10046_FREQ_3617,
  24         .request_firmware = alps_tdhd1_204_request_firmware
  25 };
  26 
  27 static int alps_tdhd1_204a_tuner_set_params(struct dvb_frontend *fe)
  28 {
  29         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  30         struct i2c_adapter *i2c = fe->tuner_priv;
  31         u8 data[4];
  32         struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
  33         u32 div;
  34 
  35         div = (p->frequency + 36166666) / 166666;
  36 
  37         data[0] = (div >> 8) & 0x7f;
  38         data[1] = div & 0xff;
  39         data[2] = 0x85;
  40 
  41         if (p->frequency >= 174000000 && p->frequency <= 230000000)
  42                 data[3] = 0x02;
  43         else if (p->frequency >= 470000000 && p->frequency <= 823000000)
  44                 data[3] = 0x0C;
  45         else if (p->frequency > 823000000 && p->frequency <= 862000000)
  46                 data[3] = 0x8C;
  47         else
  48                 return -EINVAL;
  49 
  50         if (fe->ops.i2c_gate_ctrl)
  51                 fe->ops.i2c_gate_ctrl(fe, 1);
  52         if (i2c_transfer(i2c, &msg, 1) != 1)
  53                 return -EIO;
  54 
  55         return 0;
  56 }
  57 
  58 #endif /* TDHD1_H */