/*
  stm32flash - Open Source ST STM32 flash program for *nix
  Copyright (C) 2010 Geoffrey McRae <geoff@spacevs.com>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version 2
  of the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/


#ifndef _STM32_H
#define _STM32_H

#include <stdint.h>
#include "serial.h"

#define STM32_MAX_RX_FRAME	256	/* cmd read memory */
#define STM32_MAX_TX_FRAME	(1 + 256 + 1)	/* cmd write memory */

#define STM32_MAX_PAGES		0x0000ffff
#define STM32_MASS_ERASE	0x00100000 /* > 2 x max_pages */

typedef enum {
	STM32_ERR_OK = 0,
	STM32_ERR_UNKNOWN,	/* Generic error */
	STM32_ERR_NACK,
	STM32_ERR_NO_CMD,	/* Command not available in bootloader */
} stm32_err_t;

typedef enum {
	F_NO_ME  = 1 << 0,	/* Mass-Erase not supported */
	F_OBLL   = 1 << 1,	/* OBL_LAUNCH required */
	F_PEMPTY = 1 << 2,	/* clear PEMPTY bit required */
} flags_t;

typedef struct stm32		stm32_t;
typedef struct stm32_cmd	stm32_cmd_t;
typedef struct stm32_dev	stm32_dev_t;

struct stm32 {
	const serial_t		*serial;
	struct port_interface	*port;
	uint8_t			bl_version;
	uint8_t			version;
	uint8_t			option1, option2;
	uint16_t		pid;
	stm32_cmd_t		*cmd;
	const stm32_dev_t	*dev;
};

struct stm32_dev {
	uint16_t	id;
	const char	*name;
	uint32_t	ram_start, ram_end;
	uint32_t	fl_start, fl_end;
	uint16_t	fl_pps; // pages per sector
	uint32_t	*fl_ps;  // page size
	uint32_t	opt_start, opt_end;
	uint32_t	mem_start, mem_end;
	uint32_t	flags;
};

stm32_t *stm32_init(struct port_interface *port, const char init);
void stm32_close(stm32_t *stm);
stm32_err_t stm32_read_memory(const stm32_t *stm, uint32_t address,
			      uint8_t data[], unsigned int len);
stm32_err_t stm32_write_memory(const stm32_t *stm, uint32_t address,
			       const uint8_t data[], unsigned int len);
stm32_err_t stm32_wunprot_memory(const stm32_t *stm);
stm32_err_t stm32_wprot_memory(const stm32_t *stm);
stm32_err_t stm32_erase_memory(const stm32_t *stm, uint32_t spage,
			       uint32_t pages);
stm32_err_t stm32_go(const stm32_t *stm, uint32_t address);
stm32_err_t stm32_reset_device(const stm32_t *stm);
stm32_err_t stm32_readprot_memory(const stm32_t *stm);
stm32_err_t stm32_runprot_memory(const stm32_t *stm);
stm32_err_t stm32_crc_memory(const stm32_t *stm, uint32_t address,
			     uint32_t length, uint32_t *crc);
stm32_err_t stm32_crc_wrapper(const stm32_t *stm, uint32_t address,
			      uint32_t length, uint32_t *crc);
uint32_t stm32_sw_crc(uint32_t crc, uint8_t *buf, unsigned int len);

#endif