44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
|
#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 */
|