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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
eepromser.h
Serial EEPROM devices.
***************************************************************************/
#pragma once
#ifndef __EEPROMSER_H__
#define __EEPROMSER_H__
#include "eeprom.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
// standard 93CX6 class of 16-bit EEPROMs
#define MCFG_EEPROM_SERIAL_93C06_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C06_16BIT, 0)
#define MCFG_EEPROM_SERIAL_93C46_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C46_16BIT, 0)
#define MCFG_EEPROM_SERIAL_93C56_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C56_16BIT, 0)
#define MCFG_EEPROM_SERIAL_93C57_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C57_16BIT, 0)
#define MCFG_EEPROM_SERIAL_93C66_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C66_16BIT, 0)
#define MCFG_EEPROM_SERIAL_93C76_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C76_16BIT, 0)
#define MCFG_EEPROM_SERIAL_93C86_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C86_16BIT, 0)
// some manufacturers use pin 6 as an "ORG" pin which, when pulled low, configures memory for 8-bit accesses
#define MCFG_EEPROM_SERIAL_93C46_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C46_8BIT, 0)
#define MCFG_EEPROM_SERIAL_93C56_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C56_8BIT, 0)
#define MCFG_EEPROM_SERIAL_93C57_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C57_8BIT, 0)
#define MCFG_EEPROM_SERIAL_93C66_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C66_8BIT, 0)
#define MCFG_EEPROM_SERIAL_93C76_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C76_8BIT, 0)
#define MCFG_EEPROM_SERIAL_93C86_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_93C86_8BIT, 0)
// ER5911 has a separate ready pin, a reduced command set, and supports 8/16 bit out of the box
#define MCFG_EEPROM_SERIAL_ER5911_8BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_ER5911_8BIT, 0)
#define MCFG_EEPROM_SERIAL_ER5911_16BIT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, EEPROM_SERIAL_ER5911_16BIT, 0)
// optional enable for streaming reads
#define MCFG_EEPROM_SERIAL_ENABLE_STREAMING() \
eeprom_serial_base_device::static_enable_streaming(*device);
// pass-throughs to the base class for setting default data
#define MCFG_EEPROM_SERIAL_DATA MCFG_EEPROM_DATA
#define MCFG_EEPROM_SERIAL_DEFAULT_VALUE MCFG_EEPROM_DEFAULT_VALUE
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> eeprom_serial_base_device
class eeprom_serial_base_device : public eeprom_base_device
{
protected:
// construction/destruction
eeprom_serial_base_device(const machine_config &mconfig, device_type devtype, const char *name, const char *tag, device_t *owner, const char *shortname, const char *file);
public:
// inline configuration helpers
static void static_set_address_bits(device_t &device, int addrbits);
static void static_enable_streaming(device_t &device);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
// read interfaces differ between implementations
// commands
enum eeprom_command
{
COMMAND_INVALID,
COMMAND_READ,
COMMAND_WRITE,
COMMAND_ERASE,
COMMAND_LOCK,
COMMAND_UNLOCK,
COMMAND_WRITEALL,
COMMAND_ERASEALL
};
// states
enum eeprom_state
{
STATE_IN_RESET,
STATE_WAIT_FOR_START_BIT,
STATE_WAIT_FOR_COMMAND,
STATE_READING_DATA,
STATE_WAIT_FOR_DATA,
STATE_WAIT_FOR_COMPLETION
};
// events
enum eeprom_event
{
EVENT_CS_RISING_EDGE = 1 << 0,
EVENT_CS_FALLING_EDGE = 1 << 1,
EVENT_CLK_RISING_EDGE = 1 << 2,
EVENT_CLK_FALLING_EDGE = 1 << 3
};
// internal helpers
void set_state(eeprom_state newstate);
void handle_event(eeprom_event event);
void execute_command();
void execute_write_command();
// subclass helpers
void base_cs_write(int state);
void base_clk_write(int state);
void base_di_write(int state);
int base_do_read();
int base_ready_read();
// subclass overrides
virtual void parse_command_and_address() = 0;
// configuration state
UINT8 m_command_address_bits; // number of address bits in a command
bool m_streaming_enabled; // true if streaming is enabled
// runtime state
eeprom_state m_state; // current internal state
UINT8 m_cs_state; // state of the CS line
attotime m_last_cs_rising_edge_time; // time of the last CS rising edge
UINT8 m_oe_state; // state of the OE line
UINT8 m_clk_state; // state of the CLK line
UINT8 m_di_state; // state of the DI line
bool m_locked; // are we locked against writes?
UINT32 m_bits_accum; // number of bits accumulated
UINT32 m_command_address_accum; // accumulator of command+address bits
eeprom_command m_command; // current command
UINT32 m_address; // current address extracted from command
UINT32 m_shift_register; // holds data coming in/going out
};
// ======================> eeprom_serial_93cxx_device
class eeprom_serial_93cxx_device : public eeprom_serial_base_device
{
protected:
// construction/destruction
eeprom_serial_93cxx_device(const machine_config &mconfig, device_type devtype, const char *name, const char *tag, device_t *owner, const char *shortname, const char *file);
public:
// read handlers
DECLARE_READ_LINE_MEMBER(do_read); // combined DO+READY/BUSY
// write handlers
DECLARE_WRITE_LINE_MEMBER(cs_write); // CS signal (active high)
DECLARE_WRITE_LINE_MEMBER(clk_write); // CLK signal (active high)
DECLARE_WRITE_LINE_MEMBER(di_write); // DI
protected:
// subclass overrides
virtual void parse_command_and_address();
};
// ======================> eeprom_serial_er5911_device
class eeprom_serial_er5911_device : public eeprom_serial_base_device
{
protected:
// construction/destruction
eeprom_serial_er5911_device(const machine_config &mconfig, device_type devtype, const char *name, const char *tag, device_t *owner, const char *shortname, const char *file);
public:
// read handlers
DECLARE_READ_LINE_MEMBER(do_read); // DO
DECLARE_READ_LINE_MEMBER(ready_read); // READY/BUSY only
// write handlers
DECLARE_WRITE_LINE_MEMBER(cs_write); // CS signal (active high)
DECLARE_WRITE_LINE_MEMBER(clk_write); // CLK signal (active high)
DECLARE_WRITE_LINE_MEMBER(di_write); // DI
protected:
// subclass overrides
virtual void parse_command_and_address();
};
//**************************************************************************
// DERIVED TYPES
//**************************************************************************
// macro for declaring a new device class
#define DECLARE_SERIAL_EEPROM_DEVICE(_baseclass, _lowercase, _uppercase, _bits) \
class eeprom_serial_##_lowercase##_##_bits##bit_device : public eeprom_serial_##_baseclass##_device \
{ \
public: \
eeprom_serial_##_lowercase##_##_bits##bit_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); \
}; \
extern const device_type EEPROM_SERIAL_##_uppercase##_##_bits##BIT;
// standard 93CX6 class of 16-bit EEPROMs
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c06, 93C06, 16)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c46, 93C46, 16)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c56, 93C56, 16)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c57, 93C57, 16)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c66, 93C66, 16)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c76, 93C76, 16)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c86, 93C86, 16)
// some manufacturers use pin 6 as an "ORG" pin which, when pulled low, configures memory for 8-bit accesses
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c46, 93C46, 8)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c56, 93C56, 8)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c57, 93C57, 8)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c66, 93C66, 8)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c76, 93C76, 8)
DECLARE_SERIAL_EEPROM_DEVICE(93cxx, 93c86, 93C86, 8)
// ER5911 has a separate ready pin, a reduced command set, and supports 8/16 bit out of the box
DECLARE_SERIAL_EEPROM_DEVICE(er5911, er5911, ER5911, 8)
DECLARE_SERIAL_EEPROM_DEVICE(er5911, er5911, ER5911, 16)
#endif
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