162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef __LM7000_H 362306a36Sopenharmony_ci#define __LM7000_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci/* Sanyo LM7000 tuner chip control 662306a36Sopenharmony_ci * 762306a36Sopenharmony_ci * Copyright 2012 Ondrej Zary <linux@rainbow-software.org> 862306a36Sopenharmony_ci * based on radio-aimslab.c by M. Kirkwood 962306a36Sopenharmony_ci * and radio-sf16fmi.c by M. Kirkwood and Petr Vandrovec 1062306a36Sopenharmony_ci */ 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci#define LM7000_DATA (1 << 0) 1362306a36Sopenharmony_ci#define LM7000_CLK (1 << 1) 1462306a36Sopenharmony_ci#define LM7000_CE (1 << 2) 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci#define LM7000_FM_100 (0 << 20) 1762306a36Sopenharmony_ci#define LM7000_FM_50 (1 << 20) 1862306a36Sopenharmony_ci#define LM7000_FM_25 (2 << 20) 1962306a36Sopenharmony_ci#define LM7000_BIT_FM (1 << 23) 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_cistatic inline void lm7000_set_freq(u32 freq, void *handle, 2262306a36Sopenharmony_ci void (*set_pins)(void *handle, u8 pins)) 2362306a36Sopenharmony_ci{ 2462306a36Sopenharmony_ci int i; 2562306a36Sopenharmony_ci u8 data; 2662306a36Sopenharmony_ci u32 val; 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ci freq += 171200; /* Add 10.7 MHz IF */ 2962306a36Sopenharmony_ci freq /= 400; /* Convert to 25 kHz units */ 3062306a36Sopenharmony_ci val = freq | LM7000_FM_25 | LM7000_BIT_FM; 3162306a36Sopenharmony_ci /* write the 24-bit register, starting with LSB */ 3262306a36Sopenharmony_ci for (i = 0; i < 24; i++) { 3362306a36Sopenharmony_ci data = val & (1 << i) ? LM7000_DATA : 0; 3462306a36Sopenharmony_ci set_pins(handle, data | LM7000_CE); 3562306a36Sopenharmony_ci udelay(2); 3662306a36Sopenharmony_ci set_pins(handle, data | LM7000_CE | LM7000_CLK); 3762306a36Sopenharmony_ci udelay(2); 3862306a36Sopenharmony_ci set_pins(handle, data | LM7000_CE); 3962306a36Sopenharmony_ci udelay(2); 4062306a36Sopenharmony_ci } 4162306a36Sopenharmony_ci set_pins(handle, 0); 4262306a36Sopenharmony_ci} 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci#endif /* __LM7000_H */ 45