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// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************

        Hitachi HD44352 LCD controller

***************************************************************************/

#ifndef MAME_VIDEO_HD44352_H
#define MAME_VIDEO_HD44352_H

#pragma once


#define MCFG_HD44352_ON_CB(_devcb) \
	downcast<hd44352_device &>(*device).set_on_callback(DEVCB_##_devcb);


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> hd44352_device

class hd44352_device : public device_t
{
public:
	// construction/destruction
	hd44352_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	template <class Object> devcb_base &set_on_callback(Object &&cb) { return m_on_cb.set_callback(std::forward<Object>(cb)); }

	// device interface
	uint8_t data_read();
	void data_write(uint8_t data);
	void control_write(uint8_t data);

	uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
	virtual void device_validity_check(validity_checker &valid) const override;

private:
	uint8_t compute_newval(uint8_t type, uint8_t oldval, uint8_t newval);
	uint8_t get_char(uint16_t pos);

	static const device_timer_id ON_TIMER = 1;
	emu_timer *m_on_timer;

	uint8_t m_video_ram[2][0x180];
	uint8_t m_control_lines;
	uint8_t m_data_bus;
	uint8_t m_par[3];
	uint8_t m_state;
	uint16_t m_bank;
	uint16_t m_offset;
	uint8_t m_char_width;
	uint8_t m_lcd_on;
	uint8_t m_scroll;
	uint32_t m_contrast;

	uint8_t m_custom_char[4][8];      // 4 chars * 8 bytes
	uint8_t m_byte_count;
	uint8_t m_cursor_status;
	uint8_t m_cursor[8];
	uint8_t m_cursor_x;
	uint8_t m_cursor_y;
	uint8_t m_cursor_lcd;

	devcb_write_line    m_on_cb;        // ON line callback
	required_region_ptr<uint8_t> m_char_rom;
};

// device type definition
DECLARE_DEVICE_TYPE(HD44352, hd44352_device)

#endif // MAME_VIDEO_HD44352_H