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// license:BSD-3-Clause
// copyright-holders:Philip Bennett
/*************************************************************************

    Lock-On hardware

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

#include "machine/watchdog.h"
#include "sound/flt_vol.h"
#include "screen.h"

/* Calculated from CRT controller writes */
#define PIXEL_CLOCK            (XTAL(21'000'000) / 3)
#define FRAMEBUFFER_CLOCK      XTAL(10'000'000)
#define HBSTART                320
#define HBEND                  0
#define HTOTAL                 448
#define VBSTART                240
#define VBEND                  0
#define VTOTAL                 280


class lockon_state : public driver_device
{
public:
	lockon_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_char_ram(*this, "char_ram"),
		m_hud_ram(*this, "hud_ram"),
		m_scene_ram(*this, "scene_ram"),
		m_ground_ram(*this, "ground_ram"),
		m_object_ram(*this, "object_ram"),
		m_maincpu(*this, "maincpu"),
		m_audiocpu(*this, "audiocpu"),
		m_ground(*this, "ground"),
		m_object(*this, "object"),
		m_watchdog(*this, "watchdog"),
		m_f2203_1l(*this, "f2203.1l"),
		m_f2203_2l(*this, "f2203.2l"),
		m_f2203_3l(*this, "f2203.3l"),
		m_f2203_1r(*this, "f2203.1r"),
		m_f2203_2r(*this, "f2203.2r"),
		m_f2203_3r(*this, "f2203.3r"),
		m_gfxdecode(*this, "gfxdecode"),
		m_screen(*this, "screen"),
		m_palette(*this, "palette") { }

	void lockon(machine_config &config);

protected:
	virtual void machine_start() override;
	virtual void machine_reset() override;
	virtual void video_start() override;

private:
	/* memory pointers */
	required_shared_ptr<uint16_t> m_char_ram;
	required_shared_ptr<uint16_t> m_hud_ram;
	required_shared_ptr<uint16_t> m_scene_ram;
	required_shared_ptr<uint16_t> m_ground_ram;
	required_shared_ptr<uint16_t> m_object_ram;

	/* video-related */
	tilemap_t       *m_tilemap;
	uint8_t           m_ground_ctrl;
	uint16_t          m_scroll_h;
	uint16_t          m_scroll_v;
	std::unique_ptr<bitmap_ind16> m_front_buffer;
	std::unique_ptr<bitmap_ind16> m_back_buffer;
	emu_timer       *m_bufend_timer;
	emu_timer       *m_cursor_timer;

	/* Rotation Control */
	uint16_t      m_xsal;
	uint16_t      m_x0ll;
	uint16_t      m_dx0ll;
	uint16_t      m_dxll;
	uint16_t      m_ysal;
	uint16_t      m_y0ll;
	uint16_t      m_dy0ll;
	uint16_t      m_dyll;

	/* Object palette RAM control */
	uint32_t      m_iden;
	std::unique_ptr<uint8_t[]>       m_obj_pal_ram;
	uint32_t      m_obj_pal_latch;
	uint32_t      m_obj_pal_addr;

	/* misc */
	uint8_t       m_ctrl_reg;
	uint32_t      m_main_inten;

	/* devices */
	required_device<cpu_device> m_maincpu;
	required_device<cpu_device> m_audiocpu;
	required_device<cpu_device> m_ground;
	required_device<cpu_device> m_object;
	required_device<watchdog_timer_device> m_watchdog;
	required_device<filter_volume_device> m_f2203_1l;
	required_device<filter_volume_device> m_f2203_2l;
	required_device<filter_volume_device> m_f2203_3l;
	required_device<filter_volume_device> m_f2203_1r;
	required_device<filter_volume_device> m_f2203_2r;
	required_device<filter_volume_device> m_f2203_3r;
	required_device<gfxdecode_device> m_gfxdecode;
	required_device<screen_device> m_screen;
	required_device<palette_device> m_palette;

	DECLARE_READ16_MEMBER(lockon_crtc_r);
	DECLARE_WRITE16_MEMBER(lockon_crtc_w);
	DECLARE_WRITE16_MEMBER(lockon_char_w);
	DECLARE_WRITE16_MEMBER(lockon_scene_h_scr_w);
	DECLARE_WRITE16_MEMBER(lockon_scene_v_scr_w);
	DECLARE_WRITE16_MEMBER(lockon_ground_ctrl_w);
	DECLARE_WRITE16_MEMBER(lockon_tza112_w);
	DECLARE_READ16_MEMBER(lockon_obj_4000_r);
	DECLARE_WRITE16_MEMBER(lockon_obj_4000_w);
	DECLARE_WRITE16_MEMBER(lockon_fb_clut_w);
	DECLARE_WRITE16_MEMBER(lockon_rotate_w);
	DECLARE_WRITE16_MEMBER(adrst_w);
	DECLARE_READ16_MEMBER(main_gnd_r);
	DECLARE_WRITE16_MEMBER(main_gnd_w);
	DECLARE_READ16_MEMBER(main_obj_r);
	DECLARE_WRITE16_MEMBER(main_obj_w);
	DECLARE_WRITE16_MEMBER(tst_w);
	DECLARE_READ16_MEMBER(main_z80_r);
	DECLARE_WRITE16_MEMBER(main_z80_w);
	DECLARE_WRITE16_MEMBER(inten_w);
	DECLARE_WRITE16_MEMBER(emres_w);
	DECLARE_WRITE8_MEMBER(sound_vol);
	DECLARE_WRITE8_MEMBER(ym2203_out_b);
	TILE_GET_INFO_MEMBER(get_lockon_tile_info);
	DECLARE_PALETTE_INIT(lockon);
	uint32_t screen_update_lockon(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	DECLARE_WRITE_LINE_MEMBER(screen_vblank_lockon);
	TIMER_CALLBACK_MEMBER(cursor_callback);
	TIMER_CALLBACK_MEMBER(bufend_callback);
	void scene_draw();
	void ground_draw();
	void objects_draw();
	void rotate_draw( bitmap_ind16 &bitmap, const rectangle &cliprect );
	void hud_draw( bitmap_ind16 &bitmap, const rectangle &cliprect );
	DECLARE_WRITE_LINE_MEMBER(ym2203_irq);
	void ground_v30(address_map &map);
	void main_v30(address_map &map);
	void object_v30(address_map &map);
	void sound_io(address_map &map);
	void sound_prg(address_map &map);
};