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/* Sanyo LM7000 tuner chip driver
*
* 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
*/
#include <linux/delay.h>
#include <linux/module.h>
#include "lm7000.h"
MODULE_AUTHOR("Ondrej Zary <linux@rainbow-software.org>");
MODULE_DESCRIPTION("Routines for Sanyo LM7000 AM/FM radio tuner chip");
MODULE_LICENSE("GPL");
/* write the 24-bit register, starting with LSB */
static void lm7000_write(struct lm7000 *lm, u32 val)
{
int i;
u8 data;
for (i = 0; i < 24; i++) {
data = val & (1 << i) ? LM7000_DATA : 0;
lm->set_pins(lm, data | LM7000_CE);
udelay(2);
lm->set_pins(lm, data | LM7000_CE | LM7000_CLK);
udelay(2);
lm->set_pins(lm, data | LM7000_CE);
udelay(2);
}
lm->set_pins(lm, 0);
}
void lm7000_set_freq(struct lm7000 *lm, u32 freq)
{
freq += 171200; /* Add 10.7 MHz IF */
freq /= 400; /* Convert to 25 kHz units */
lm7000_write(lm, freq | LM7000_FM_25 | LM7000_BIT_FM);
}
EXPORT_SYMBOL(lm7000_set_freq);
static int __init lm7000_module_init(void)
{
return 0;
}
static void __exit lm7000_module_exit(void)
{
}
module_init(lm7000_module_init)
module_exit(lm7000_module_exit)
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