// license:BSD-3-Clause // copyright-holders:David Haywood, Luca Elia /* Serial Flash */ #ifndef MAME_MACHINE_SERFLASH_H #define MAME_MACHINE_SERFLASH_H #pragma once //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_SERFLASH_ADD(_tag) \ MCFG_DEVICE_ADD(_tag, SERFLASH, 0) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> serflash_device class serflash_device : public device_t, public device_nvram_interface { public: // custom initialization for default state typedef device_delegate init_delegate; // construction/destruction serflash_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); 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: static constexpr unsigned FLASH_PAGE_SIZE = 2048+64; 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; 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; uint16_t m_flash_row, m_flash_col; int m_flash_page_addr; uint16_t m_flash_page_index; std::vector m_flashwritemap; uint8_t m_last_flash_cmd; uint32_t m_flash_addr; uint8_t m_flash_page_data[FLASH_PAGE_SIZE]; }; // device type definition DECLARE_DEVICE_TYPE(SERFLASH, serflash_device) #endif // MAME_MACHINE_SERFLASH_H