// license:BSD-3-Clause // copyright-holders:smf, Carl /********************************************************************** 8250 UART interface and emulation **********************************************************************/ #ifndef __INS8250_H_ #define __INS8250_H_ #include "emu.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, std::string name, std::string tag, device_t *owner, UINT32 clock, std::string shortname); template static devcb_base &set_out_tx_callback(device_t &device, _Object object) { return downcast(device).m_out_tx_cb.set_callback(object); } template static devcb_base &set_out_dtr_callback(device_t &device, _Object object) { return downcast(device).m_out_dtr_cb.set_callback(object); } template static devcb_base &set_out_rts_callback(device_t &device, _Object object) { return downcast(device).m_out_rts_cb.set_callback(object); } template static devcb_base &set_out_int_callback(device_t &device, _Object object) { return downcast(device).m_out_int_cb.set_callback(object); } template static devcb_base &set_out_out1_callback(device_t &device, _Object object) { return downcast(device).m_out_out1_cb.set_callback(object); } template static devcb_base &set_out_out2_callback(device_t &device, _Object object) { return downcast(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 data) {} virtual void push_tx(UINT8 data) {} virtual UINT8 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 thr; /* 0 -W transmitter holding register */ UINT8 rbr; /* 0 R- receiver buffer register */ UINT8 ier; /* 1 RW interrupt enable register */ UINT16 dl; /* 0/1 RW divisor latch (if DLAB = 1) */ UINT8 iir; /* 2 R- interrupt identification register */ UINT8 fcr; UINT8 lcr; /* 3 RW line control register (bit 7: DLAB) */ UINT8 mcr; /* 4 RW modem control register */ UINT8 lsr; /* 5 R- line status register */ UINT8 msr; /* 6 R- modem status register */ UINT8 scr; /* 7 RW scratch register */ } m_regs; private: UINT8 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, std::string tag, device_t *owner, UINT32 clock); }; class ns16450_device : public ins8250_uart_device { public: ns16450_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); }; class ns16550_device : public ins8250_uart_device { public: ns16550_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 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 data) override; virtual void push_tx(UINT8 data) override; virtual UINT8 pop_rx() override; private: void set_timer() { m_timeout->adjust(attotime::from_hz((clock()*4*8)/(m_regs.dl*16))); } int m_rintlvl; UINT8 m_rfifo[16]; UINT8 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, std::string tag, device_t *owner, UINT32 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