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// license: BSD-3-Clause
// copyright-holders: Fabio Priuli, MetalliC
#ifndef MAME_MACHINE_M95320_H
#define MAME_MACHINE_M95320_H
#pragma once
#include "machine/eeprom.h"
class m95320_eeprom_device : public device_t, public device_nvram_interface
{
public:
m95320_eeprom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
void set_cs_line(int);
void set_halt_line(int state) {}; // TODO: not implemented
void set_si_line(int);
void set_sck_line(int state);
int get_so_line(void);
protected:
m95320_eeprom_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock = 0);
virtual void device_start() override ATTR_COLD;
virtual void nvram_default() override;
virtual bool nvram_read(util::read_stream &file) override;
virtual bool nvram_write(util::write_stream &file) override;
private:
enum stmstate_t
{
IDLE = 0,
CMD_WRSR,
CMD_RDSR,
CMD_READ,
CMD_WRITE,
READING,
WRITING
};
static constexpr unsigned m_size = 0x1000;
int m_latch;
int m_reset_line;
int m_sck_line;
int m_wel;
stmstate_t m_internal_state;
int m_stream_pos;
int m_stream_data;
int m_eeprom_addr;
std::unique_ptr<u8[]> m_eeprom_data;
};
DECLARE_DEVICE_TYPE(M95320_EEPROM, m95320_eeprom_device)
#endif // MAME_MACHINE_M95320_H
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