LXR linux/drivers/media/dvb-frontends/tdhd1.h

   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
  15static int alps_tdhd1_204_request_firmware(struct dvb_frontend *fe, const struct firmware **fw, char *name);
  16
  17static 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
  27static 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 */
  59