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