| /* SPDX-License-Identifier: GPL-2.0 */ |
| #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 */ |