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
alps_tdhd1_204a_tuner_set_params(struct dvb_frontend * fe)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 */
59