// license:BSD-3-Clause
// copyright-holders:smf, Carl
/**********************************************************************
8250 UART interface and emulation
**********************************************************************/
#ifndef __INS8250_H_
#define __INS8250_H_
/***************************************************************************
CLASS DEFINITIONS
***************************************************************************/
class ins8250_uart_device : public device_t,
public device_serial_interface
{
public:
ins8250_uart_device(const machine_config &mconfig, device_type type, const char* name, const char *tag, device_t *owner, uint32_t clock, const char *shortname);
template<class _Object> static devcb_base &set_out_tx_callback(device_t &device, _Object object) { return downcast<ins8250_uart_device &>(device).m_out_tx_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_dtr_callback(device_t &device, _Object object) { return downcast<ins8250_uart_device &>(device).m_out_dtr_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_rts_callback(device_t &device, _Object object) { return downcast<ins8250_uart_device &>(device).m_out_rts_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_int_callback(device_t &device, _Object object) { return downcast<ins8250_uart_device &>(device).m_out_int_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_out1_callback(device_t &device, _Object object) { return downcast<ins8250_uart_device &>(device).m_out_out1_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_out2_callback(device_t &device, _Object object) { return downcast<ins8250_uart_device &>(device).m_out_out2_cb.set_callback(object); }
DECLARE_WRITE8_MEMBER( ins8250_w );
DECLARE_READ8_MEMBER( ins8250_r );
DECLARE_WRITE_LINE_MEMBER( dcd_w );
DECLARE_WRITE_LINE_MEMBER( dsr_w );
DECLARE_WRITE_LINE_MEMBER( ri_w );
DECLARE_WRITE_LINE_MEMBER( cts_w );
DECLARE_WRITE_LINE_MEMBER( rx_w );
protected:
virtual void device_start() override;
virtual void device_reset() override;
virtual void rcv_complete() override;
virtual void tra_complete() override;
virtual void tra_callback() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual void set_fcr(uint8_t data) {}
virtual void push_tx(uint8_t data) {}
virtual uint8_t pop_rx() { return 0; }
void trigger_int(int flag);
void clear_int(int flag);
enum {
TYPE_INS8250 = 0,
TYPE_INS8250A,
TYPE_NS16450,
TYPE_NS16550,
TYPE_NS16550A
};
int m_device_type;
struct {
uint8_t thr; /* 0 -W transmitter holding register */
uint8_t rbr; /* 0 R- receiver buffer register */
uint8_t ier; /* 1 RW interrupt enable register */
uint16_t dl; /* 0/1 RW divisor latch (if DLAB = 1) */
uint8_t iir; /* 2 R- interrupt identification register */
uint8_t fcr;
uint8_t lcr; /* 3 RW line control register (bit 7: DLAB) */
uint8_t mcr; /* 4 RW modem control register */
uint8_t lsr; /* 5 R- line status register */
uint8_t msr; /* 6 R- modem status register */
uint8_t scr; /* 7 RW scratch register */
} m_regs;
private:
uint8_t m_int_pending;
devcb_write_line m_out_tx_cb;
devcb_write_line m_out_dtr_cb;
devcb_write_line m_out_rts_cb;
devcb_write_line m_out_int_cb;
devcb_write_line m_out_out1_cb;
devcb_write_line m_out_out2_cb;
void update_interrupt();
void update_msr();
int m_txd;
int m_rxd;
int m_dcd;
int m_dsr;
int m_ri;
int m_cts;
};
class ins8250_device : public ins8250_uart_device
{
public:
ins8250_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class ns16450_device : public ins8250_uart_device
{
public:
ns16450_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class ns16550_device : public ins8250_uart_device
{
public:
ns16550_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
virtual void device_start() override;
virtual void device_reset() override;
virtual void rcv_complete() override;
virtual void tra_complete() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual void set_fcr(uint8_t data) override;
virtual void push_tx(uint8_t data) override;
virtual uint8_t pop_rx() override;
private:
void set_timer() { m_timeout->adjust(attotime::from_hz((clock()*4*8)/(m_regs.dl*16))); }
int m_rintlvl;
uint8_t m_rfifo[16];
uint8_t m_tfifo[16];
int m_rhead, m_rtail, m_rnum;
int m_thead, m_ttail;
emu_timer *m_timeout;
};
class pc16552_device : public device_t
{
public:
pc16552_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
DECLARE_READ8_MEMBER(read) { return ((offset & 8) ? m_chan1 : m_chan0)->ins8250_r(space, offset & 7, mem_mask); }
DECLARE_WRITE8_MEMBER(write) { ((offset & 8) ? m_chan1 : m_chan0)->ins8250_w(space, offset & 7, data, mem_mask); }
protected:
virtual void device_start() override;
private:
ns16550_device *m_chan0;
ns16550_device *m_chan1;
};
extern const device_type PC16552D;
extern const device_type INS8250;
extern const device_type NS16450;
extern const device_type NS16550;
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_INS8250_OUT_TX_CB(_devcb) \
devcb = &ins8250_uart_device::set_out_tx_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8250_OUT_DTR_CB(_devcb) \
devcb = &ins8250_uart_device::set_out_dtr_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8250_OUT_RTS_CB(_devcb) \
devcb = &ins8250_uart_device::set_out_rts_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8250_OUT_INT_CB(_devcb) \
devcb = &ins8250_uart_device::set_out_int_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8250_OUT_OUT1_CB(_devcb) \
devcb = &ins8250_uart_device::set_out_out1_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8250_OUT_OUT2_CB(_devcb) \
devcb = &ins8250_uart_device::set_out_out2_callback(*device, DEVCB_##_devcb);
#endif