152 lines
5.0 KiB
C
152 lines
5.0 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Definitions for the NS8250/16450/16550/16650/16750/16850/16950
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* UART emulation.
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*
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*
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*
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* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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* Fred N. van Kempen, <decwiz@yahoo.com>
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*
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* Copyright 2008-2020 Sarah Walker.
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* Copyright 2016-2020 Miran Grca.
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* Copyright 2017-2020 Fred N. van Kempen.
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*/
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#ifndef EMU_SERIAL_H
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#define EMU_SERIAL_H
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#define SERIAL_8250 0
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#define SERIAL_8250_PCJR 1
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#define SERIAL_16450 2
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#define SERIAL_16550 3
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#define SERIAL_16650 4
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#define SERIAL_16750 5
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#define SERIAL_16850 6
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#define SERIAL_16950 7
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#define SERIAL_FIFO_SIZE 16
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/* Default settings for the standard ports. */
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#define COM1_ADDR 0x03f8
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#define COM1_IRQ 4
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#define COM2_ADDR 0x02f8
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#define COM2_IRQ 3
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#define COM3_ADDR 0x03e8
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#define COM3_IRQ 4
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#define COM4_ADDR 0x02e8
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#define COM4_IRQ 3
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struct serial_device_s;
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struct serial_s;
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typedef struct serial_s {
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uint8_t lsr;
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uint8_t thr;
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uint8_t mctrl;
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uint8_t rcr;
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uint8_t iir;
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uint8_t ier;
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uint8_t lcr;
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uint8_t msr;
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uint8_t dat;
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uint8_t int_status;
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uint8_t scratch;
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uint8_t fcr;
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uint8_t irq;
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uint8_t type;
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uint8_t inst;
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uint8_t transmit_enabled;
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uint8_t fifo_enabled;
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uint8_t bits;
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uint8_t data_bits;
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uint8_t baud_cycles;
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uint8_t txsr;
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uint8_t txsr_empty;
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uint8_t msr_set;
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uint8_t irq_state;
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uint16_t dlab;
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uint16_t base_address;
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uint16_t out_new;
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uint16_t thr_empty;
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void *rcvr_fifo;
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void *xmit_fifo;
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pc_timer_t transmit_timer;
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pc_timer_t timeout_timer;
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pc_timer_t receive_timer;
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double clock_src;
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double transmit_period;
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struct serial_device_s *sd;
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} serial_t;
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typedef struct serial_device_s {
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void (*rcr_callback)(struct serial_s *serial, void *priv);
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void (*dtr_callback)(struct serial_s *serial, int status, void *priv);
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void (*dev_write)(struct serial_s *serial, void *priv, uint8_t data);
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void (*lcr_callback)(struct serial_s *serial, void *priv, uint8_t lcr);
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void (*transmit_period_callback)(struct serial_s *serial, void *priv, double transmit_period);
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void *priv;
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serial_t *serial;
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} serial_device_t;
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typedef struct serial_port_s {
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uint8_t enabled;
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} serial_port_t;
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extern serial_port_t com_ports[SERIAL_MAX];
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extern serial_t *serial_attach_ex(int port,
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void (*rcr_callback)(struct serial_s *serial, void *priv),
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void (*dev_write)(struct serial_s *serial, void *priv, uint8_t data),
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void (*transmit_period_callback)(struct serial_s *serial, void *priv, double transmit_period),
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void (*lcr_callback)(struct serial_s *serial, void *priv, uint8_t data_bits),
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void *priv);
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extern serial_t *serial_attach_ex_2(int port,
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void (*rcr_callback)(struct serial_s *serial, void *priv),
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void (*dev_write)(struct serial_s *serial, void *priv, uint8_t data),
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void (*dtr_callback)(struct serial_s *serial, int status, void *priv),
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void *priv);
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#define serial_attach(port, rcr_callback, dev_write, priv) \
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serial_attach_ex(port, rcr_callback, dev_write, NULL, NULL, priv);
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extern void serial_remove(serial_t *dev);
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extern void serial_set_type(serial_t *dev, int type);
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extern void serial_setup(serial_t *dev, uint16_t addr, uint8_t irq);
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extern void serial_clear_fifo(serial_t *dev);
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extern void serial_write_fifo(serial_t *dev, uint8_t dat);
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extern void serial_set_next_inst(int ni);
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extern void serial_standalone_init(void);
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extern void serial_set_clock_src(serial_t *dev, double clock_src);
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extern void serial_reset_port(serial_t *dev);
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extern uint8_t serial_read(uint16_t addr, void *priv);
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extern void serial_device_timeout(void *priv);
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extern void serial_set_cts(serial_t *dev, uint8_t enabled);
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extern void serial_set_dsr(serial_t *dev, uint8_t enabled);
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extern void serial_set_dcd(serial_t *dev, uint8_t enabled);
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extern void serial_set_ri(serial_t *dev, uint8_t enabled);
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extern int serial_get_ri(serial_t *dev);
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extern const device_t ns8250_device;
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extern const device_t ns8250_pcjr_device;
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extern const device_t ns16450_device;
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extern const device_t ns16550_device;
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extern const device_t ns16650_device;
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extern const device_t ns16750_device;
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extern const device_t ns16850_device;
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extern const device_t ns16950_device;
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#endif /*EMU_SERIAL_H*/
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