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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2020 by Antonio Borneo <borneo.antonio@gmail.com
*/
/**
* @file
* This file implements support for STMicroelectronics debug protocol SWIM
* (Single Wire Interface Module).
*/
#ifndef OPENOCD_JTAG_SWIM_H
#define OPENOCD_JTAG_SWIM_H
#define SWIM_FREQ_LOW 363
#define SWIM_FREQ_HIGH 800
struct swim_driver {
/**
* Send SRST (system reset) command to target.
*
* @return ERROR_OK on success, else a fault code.
*/
int (*srst)(void);
/**
* Read target memory through ROTF (read on-the-fly) command.
*
* @param addr Start address to read data from target memory.
* @param size Size in bytes of data units, 1, 2 or 4.
* @param count Number of units (size units, not bytes) to read.
* @param buffer Data buffer to receive data.
* @return ERROR_OK on success, else a fault code.
*/
int (*read_mem)(uint32_t addr, uint32_t size, uint32_t count,
uint8_t *buffer);
/**
* Write target memory through WOTF (write on-the-fly) command.
*
* @param addr Start address to write data to target memory.
* @param size Size in bytes of data units, 1, 2 or 4.
* @param count Number of units (size units, not bytes) to write.
* @param buffer Data buffer to write.
* @return ERROR_OK on success, else a fault code.
*/
int (*write_mem)(uint32_t addr, uint32_t size, uint32_t count,
const uint8_t *buffer);
/**
* Reconnect to the target.
* Should be reworked to be more generic and not linked to current
* implementation in stlink driver.
*
* @return ERROR_OK on success, else a fault code.
*/
int (*reconnect)(void);
};
int swim_system_reset(void);
int swim_read_mem(uint32_t addr, uint32_t size, uint32_t count,
uint8_t *buffer);
int swim_write_mem(uint32_t addr, uint32_t size, uint32_t count,
const uint8_t *buffer);
int swim_reconnect(void);
#endif /* OPENOCD_JTAG_SWIM_H */
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