mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 13:43:55 +08:00
72a770c94d
Add very simple driver for Sanyo LM7000 AM/FM tuner chip. Only FM is supported as there is no known HW with AM implemented. This will be used by radio-aimslab and radio-sf16fmi. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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 */
|