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// license:BSD-3-Clause
// copyright-holders:David Haywood, Luca Elia
/* Serial Flash */
#ifndef MAME_MACHINE_SERFLASH_H
#define MAME_MACHINE_SERFLASH_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> serflash_device
class serflash_device : public device_t, public device_nvram_interface
{
public:
// custom initialization for default state
typedef device_delegate<void (serflash_device &, void *, size_t)> init_delegate;
// construction/destruction
serflash_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// configuration
void set_flash_page_size(uint16_t size) { m_flash_page_size = size; }
DECLARE_READ8_MEMBER( flash_ready_r );
DECLARE_READ8_MEMBER( flash_io_r );
DECLARE_WRITE8_MEMBER( flash_addr_w );
DECLARE_WRITE8_MEMBER( flash_data_w );
DECLARE_WRITE8_MEMBER( flash_cmd_w );
DECLARE_WRITE8_MEMBER( flash_enab_w );
void flash_hard_reset();
DECLARE_READ8_MEMBER(n3d_flash_r);
DECLARE_WRITE8_MEMBER(n3d_flash_cmd_w);
DECLARE_WRITE8_MEMBER(n3d_flash_addr_w);
protected:
enum class flash_state_t : u8 { IDLE = 0, READ, READ_ID, READ_STATUS, BLOCK_ERASE, PAGE_PROGRAM };
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_nvram_interface overrides
virtual void nvram_default() override;
virtual void nvram_read(emu_file &file) override;
virtual void nvram_write(emu_file &file) override;
void flash_change_state(flash_state_t state);
// runtime state
size_t m_length;
uint8_t* m_region;
uint32_t m_row_num;
uint16_t m_flash_page_size;
flash_state_t m_flash_state;
uint8_t m_flash_enab;
uint8_t m_flash_cmd_seq;
uint32_t m_flash_cmd_prev;
uint8_t m_flash_addr_seq;
uint8_t m_flash_read_seq;
uint32_t m_flash_row;
uint16_t m_flash_col;
int m_flash_page_addr;
uint32_t m_flash_page_index;
std::vector<uint8_t> m_flashwritemap;
uint8_t m_last_flash_cmd;
uint32_t m_flash_addr;
std::vector<uint8_t> m_flash_page_data;
};
// device type definition
DECLARE_DEVICE_TYPE(SERFLASH, serflash_device)
#endif // MAME_MACHINE_SERFLASH_H
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