blob: adb21796562087c26fe37c45cc74fbccdc14dc5d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LM7000_H
#define __LM7000_H
/* Sanyo LM7000 tuner chip control
*
* Copyright 2012 Ondrej Zary <linux@rainbow-software.org>
* based on radio-aimslab.c by M. Kirkwood
* and radio-sf16fmi.c by M. Kirkwood and Petr Vandrovec
*/
#define LM7000_DATA (1 << 0)
#define LM7000_CLK (1 << 1)
#define LM7000_CE (1 << 2)
#define LM7000_FM_100 (0 << 20)
#define LM7000_FM_50 (1 << 20)
#define LM7000_FM_25 (2 << 20)
#define LM7000_BIT_FM (1 << 23)
static inline void lm7000_set_freq(u32 freq, void *handle,
void (*set_pins)(void *handle, u8 pins))
{
int i;
u8 data;
u32 val;
freq += 171200; /* Add 10.7 MHz IF */
freq /= 400; /* Convert to 25 kHz units */
val = freq | LM7000_FM_25 | LM7000_BIT_FM;
/* write the 24-bit register, starting with LSB */
for (i = 0; i < 24; i++) {
data = val & (1 << i) ? LM7000_DATA : 0;
set_pins(handle, data | LM7000_CE);
udelay(2);
set_pins(handle, data | LM7000_CE | LM7000_CLK);
udelay(2);
set_pins(handle, data | LM7000_CE);
udelay(2);
}
set_pins(handle, 0);
}
#endif /* __LM7000_H */
|
