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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* userspace interface for pi433 radio module
*
* Pi433 is a 433MHz radio module for the Raspberry Pi.
* It is based on the HopeRf Module RFM69CW. Therefore, inside of this
* driver you'll find an abstraction of the rf69 chip.
*
* If needed this driver could also be extended to support other
* devices based on HopeRf rf69 as well as HopeRf modules with a similar
* interface such as RFM69HCW, RFM12, RFM95 and so on.
*
* Copyright (C) 2016 Wolf-Entwicklungen
* Marcus Wolf <linux@wolf-entwicklungen.de>
*/
#ifndef PI433_H
#define PI433_H
#include <linux/types.h>
#include "rf69_enum.h"
/*---------------------------------------------------------------------------*/
enum option_on_off {
OPTION_OFF,
OPTION_ON
};
/* IOCTL structs and commands */
/**
* struct pi433_tx_cfg
* describes the configuration of the radio module for sending data
* @frequency:
* @bit_rate:
* @modulation:
* @data_mode:
* @preamble_length:
* @sync_pattern:
* @tx_start_condition:
* @payload_length:
* @repetitions:
*
* ATTENTION:
* If the contents of 'pi433_tx_cfg' ever change
* incompatibly, then the ioctl number (see define below) must change.
*
* NOTE: struct layout is the same in 64bit and 32bit userspace.
*/
#define PI433_TX_CFG_IOCTL_NR 0
struct pi433_tx_cfg {
__u32 frequency;
__u16 bit_rate;
__u32 dev_frequency;
enum modulation modulation;
enum mod_shaping mod_shaping;
enum pa_ramp pa_ramp;
enum tx_start_condition tx_start_condition;
__u16 repetitions;
/* packet format */
enum option_on_off enable_preamble;
enum option_on_off enable_sync;
enum option_on_off enable_length_byte;
enum option_on_off enable_address_byte;
enum option_on_off enable_crc;
__u16 preamble_length;
__u8 sync_length;
__u8 fixed_message_length;
__u8 sync_pattern[8];
__u8 address_byte;
};
/**
* struct pi433_rx_cfg
* describes the configuration of the radio module for receiving data
* @frequency:
* @bit_rate:
* @modulation:
* @data_mode:
* @preamble_length:
* @sync_pattern:
* @tx_start_condition:
* @payload_length:
* @repetitions:
*
* ATTENTION:
* If the contents of 'pi433_rx_cfg' ever change
* incompatibly, then the ioctl number (see define below) must change
*
* NOTE: struct layout is the same in 64bit and 32bit userspace.
*/
#define PI433_RX_CFG_IOCTL_NR 1
struct pi433_rx_cfg {
__u32 frequency;
__u16 bit_rate;
__u32 dev_frequency;
enum modulation modulation;
__u8 rssi_threshold;
enum threshold_decrement threshold_decrement;
enum antenna_impedance antenna_impedance;
enum lna_gain lna_gain;
enum mantisse bw_mantisse; /* normal: 0x50 */
__u8 bw_exponent; /* during AFC: 0x8b */
enum dagc dagc;
/* packet format */
enum option_on_off enable_sync;
/* should be used in combination with sync, only */
enum option_on_off enable_length_byte;
/* operational with sync, only */
enum address_filtering enable_address_filtering;
/* only operational, if sync on and fixed length or length byte is used */
enum option_on_off enable_crc;
__u8 sync_length;
__u8 fixed_message_length;
__u32 bytes_to_drop;
__u8 sync_pattern[8];
__u8 node_address;
__u8 broadcast_address;
};
#define PI433_IOC_MAGIC 'r'
#define PI433_IOC_RD_TX_CFG \
_IOR(PI433_IOC_MAGIC, PI433_TX_CFG_IOCTL_NR, char[sizeof(struct pi433_tx_cfg)])
#define PI433_IOC_WR_TX_CFG \
_IOW(PI433_IOC_MAGIC, PI433_TX_CFG_IOCTL_NR, char[sizeof(struct pi433_tx_cfg)])
#define PI433_IOC_RD_RX_CFG \
_IOR(PI433_IOC_MAGIC, PI433_RX_CFG_IOCTL_NR, char[sizeof(struct pi433_rx_cfg)])
#define PI433_IOC_WR_RX_CFG \
_IOW(PI433_IOC_MAGIC, PI433_RX_CFG_IOCTL_NR, char[sizeof(struct pi433_rx_cfg)])
#endif /* PI433_H */
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