18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __LM7000_H 38c2ecf20Sopenharmony_ci#define __LM7000_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* Sanyo LM7000 tuner chip control 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * Copyright 2012 Ondrej Zary <linux@rainbow-software.org> 88c2ecf20Sopenharmony_ci * based on radio-aimslab.c by M. Kirkwood 98c2ecf20Sopenharmony_ci * and radio-sf16fmi.c by M. Kirkwood and Petr Vandrovec 108c2ecf20Sopenharmony_ci */ 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#define LM7000_DATA (1 << 0) 138c2ecf20Sopenharmony_ci#define LM7000_CLK (1 << 1) 148c2ecf20Sopenharmony_ci#define LM7000_CE (1 << 2) 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ci#define LM7000_FM_100 (0 << 20) 178c2ecf20Sopenharmony_ci#define LM7000_FM_50 (1 << 20) 188c2ecf20Sopenharmony_ci#define LM7000_FM_25 (2 << 20) 198c2ecf20Sopenharmony_ci#define LM7000_BIT_FM (1 << 23) 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_cistatic inline void lm7000_set_freq(u32 freq, void *handle, 228c2ecf20Sopenharmony_ci void (*set_pins)(void *handle, u8 pins)) 238c2ecf20Sopenharmony_ci{ 248c2ecf20Sopenharmony_ci int i; 258c2ecf20Sopenharmony_ci u8 data; 268c2ecf20Sopenharmony_ci u32 val; 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci freq += 171200; /* Add 10.7 MHz IF */ 298c2ecf20Sopenharmony_ci freq /= 400; /* Convert to 25 kHz units */ 308c2ecf20Sopenharmony_ci val = freq | LM7000_FM_25 | LM7000_BIT_FM; 318c2ecf20Sopenharmony_ci /* write the 24-bit register, starting with LSB */ 328c2ecf20Sopenharmony_ci for (i = 0; i < 24; i++) { 338c2ecf20Sopenharmony_ci data = val & (1 << i) ? LM7000_DATA : 0; 348c2ecf20Sopenharmony_ci set_pins(handle, data | LM7000_CE); 358c2ecf20Sopenharmony_ci udelay(2); 368c2ecf20Sopenharmony_ci set_pins(handle, data | LM7000_CE | LM7000_CLK); 378c2ecf20Sopenharmony_ci udelay(2); 388c2ecf20Sopenharmony_ci set_pins(handle, data | LM7000_CE); 398c2ecf20Sopenharmony_ci udelay(2); 408c2ecf20Sopenharmony_ci } 418c2ecf20Sopenharmony_ci set_pins(handle, 0); 428c2ecf20Sopenharmony_ci} 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci#endif /* __LM7000_H */ 45