// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

    pci.h

    PCI bus

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

#ifndef MAME_BUS_LPCI_PCI_H
#define MAME_BUS_LPCI_PCI_H

#pragma once

//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************
class pci_bus_device;

// ======================> pci_device_interface

class pci_device_interface :  public device_interface
{
public:
	// construction/destruction
	virtual ~pci_device_interface();

	virtual uint32_t pci_read(pci_bus_device *pcibus, int function, int offset, uint32_t mem_mask) = 0;
	virtual void pci_write(pci_bus_device *pcibus, int function, int offset, uint32_t data, uint32_t mem_mask) = 0;

	virtual void remap(int space_id, offs_t start, offs_t end) {}

	void set_pci_bus(pci_bus_device *bus) { m_pci_bus = bus; }

protected:
	pci_device_interface(const machine_config &mconfig, device_t &device);

	pci_bus_device *m_pci_bus;
};

class pci_connector_device : public device_t,
						public device_single_card_slot_interface<pci_device_interface>
{
public:
	template <typename T>
	pci_connector_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&opts, char const *dflt, bool fixed)
		: pci_connector_device(mconfig, tag, owner, (uint32_t)0)
	{
		option_reset();
		opts(*this);
		set_default_option(dflt);
		set_fixed(fixed);
	}
	pci_connector_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
	virtual ~pci_connector_device();

	pci_device_interface *get_device();

protected:
	virtual void device_start() override;
};

DECLARE_DEVICE_TYPE(PCI_CONNECTOR, pci_connector_device)

// ======================> pci_bus_device

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

	uint32_t read(offs_t offset, uint32_t mem_mask = ~0);
	void write(offs_t offset, uint32_t data, uint32_t mem_mask = ~0);

	uint64_t read_64be(offs_t offset, uint64_t mem_mask = ~0);
	void write_64be(offs_t offset, uint64_t data, uint64_t mem_mask = ~0);

	void set_busnum(int busnum) { m_busnum = busnum; }
	template <typename T>
	void set_father(T &&tag) { m_father.set_tag(std::forward<T>(tag)); }
	void set_device(int num, const char *tag) { m_devtag[num] = tag; }

	pci_bus_device *pci_search_bustree(int busnum, int devicenum, pci_bus_device *pcibus);
	void add_sibling(pci_bus_device *sibling, int busnum);

	void remap(int space_id, offs_t start, offs_t end);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_post_load() override;

private:
	uint8_t               m_busnum;

	const char *        m_devtag[32];
	pci_device_interface *m_device[32];

	pci_bus_device *    m_siblings[8];
	uint8_t               m_siblings_busnum[8];
	int                 m_siblings_count;

	offs_t              m_address;
	int8_t                m_devicenum; // device number we are addressing
	int8_t                m_busnumber; // pci bus number we are addressing
	pci_bus_device *    m_busnumaddr; // pci bus we are addressing

	optional_device<pci_bus_device> m_father;
};

// device type definition
DECLARE_DEVICE_TYPE(PCI_BUS, pci_bus_device)

#endif // MAME_BUS_LPCI_PCI_H
