122 lines
4.2 KiB
C
122 lines
4.2 KiB
C
/*
|
|
* 86Box A hypervisor and IBM PC system emulator that specializes in
|
|
* running old operating systems and software designed for IBM
|
|
* PC systems and compatibles from 1981 through fairly recent
|
|
* system designs based on the PCI bus.
|
|
*
|
|
* This file is part of the 86Box distribution.
|
|
*
|
|
* Definitions for the NS8250/16450/16550/16650/16750/16850/16950
|
|
* UART emulation.
|
|
*
|
|
*
|
|
*
|
|
* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
|
|
* Miran Grca, <mgrca8@gmail.com>
|
|
* Fred N. van Kempen, <decwiz@yahoo.com>
|
|
*
|
|
* Copyright 2008-2020 Sarah Walker.
|
|
* Copyright 2016-2020 Miran Grca.
|
|
* Copyright 2017-2020 Fred N. van Kempen.
|
|
*/
|
|
|
|
#ifndef EMU_SERIAL_H
|
|
#define EMU_SERIAL_H
|
|
|
|
#define SERIAL_8250 0
|
|
#define SERIAL_8250_PCJR 1
|
|
#define SERIAL_16450 2
|
|
#define SERIAL_16550 3
|
|
#define SERIAL_16650 4
|
|
#define SERIAL_16750 5
|
|
#define SERIAL_16850 6
|
|
#define SERIAL_16950 7
|
|
|
|
#define SERIAL_FIFO_SIZE 16
|
|
|
|
/* Default settings for the standard ports. */
|
|
#define COM1_ADDR 0x03f8
|
|
#define COM1_IRQ 4
|
|
#define COM2_ADDR 0x02f8
|
|
#define COM2_IRQ 3
|
|
#define COM3_ADDR 0x03e8
|
|
#define COM3_IRQ 4
|
|
#define COM4_ADDR 0x02e8
|
|
#define COM4_IRQ 3
|
|
|
|
struct serial_device_s;
|
|
struct serial_s;
|
|
|
|
typedef struct serial_s {
|
|
uint8_t lsr, thr, mctrl, rcr,
|
|
iir, ier, lcr, msr,
|
|
dat, int_status, scratch, fcr,
|
|
irq, type, inst, transmit_enabled,
|
|
fifo_enabled, rcvr_fifo_len, bits, data_bits,
|
|
baud_cycles, rcvr_fifo_full, txsr, out,
|
|
msr_set, pad, pad0, pad1;
|
|
|
|
uint16_t dlab, base_address, out_new, pad2;
|
|
|
|
uint8_t rcvr_fifo_pos, xmit_fifo_pos,
|
|
rcvr_fifo_end, xmit_fifo_end,
|
|
rcvr_fifo[SERIAL_FIFO_SIZE], xmit_fifo[SERIAL_FIFO_SIZE];
|
|
|
|
pc_timer_t transmit_timer, timeout_timer,
|
|
receive_timer;
|
|
double clock_src, transmit_period;
|
|
|
|
struct serial_device_s *sd;
|
|
} serial_t;
|
|
|
|
typedef struct serial_device_s {
|
|
void (*rcr_callback)(struct serial_s *serial, void *p);
|
|
void (*dev_write)(struct serial_s *serial, void *p, uint8_t data);
|
|
void (*lcr_callback)(struct serial_s *serial, void *p, uint8_t lcr);
|
|
void (*transmit_period_callback)(struct serial_s *serial, void *p, double transmit_period);
|
|
void *priv;
|
|
serial_t *serial;
|
|
} serial_device_t;
|
|
|
|
typedef struct {
|
|
uint8_t enabled;
|
|
} serial_port_t;
|
|
|
|
extern serial_port_t com_ports[SERIAL_MAX];
|
|
|
|
extern serial_t *serial_attach(int port,
|
|
void (*rcr_callback)(struct serial_s *serial, void *p),
|
|
void (*dev_write)(struct serial_s *serial, void *p, uint8_t data),
|
|
void *priv);
|
|
extern serial_t *serial_attach_ex(int port,
|
|
void (*rcr_callback)(struct serial_s *serial, void *p),
|
|
void (*dev_write)(struct serial_s *serial, void *p, uint8_t data),
|
|
void (*transmit_period_callback)(struct serial_s *serial, void *p, double transmit_period),
|
|
void (*lcr_callback)(struct serial_s *serial, void *p, uint8_t data_bits),
|
|
void *priv);
|
|
extern void serial_remove(serial_t *dev);
|
|
extern void serial_set_type(serial_t *dev, int type);
|
|
extern void serial_setup(serial_t *dev, uint16_t addr, uint8_t irq);
|
|
extern void serial_clear_fifo(serial_t *dev);
|
|
extern void serial_write_fifo(serial_t *dev, uint8_t dat);
|
|
extern void serial_set_next_inst(int ni);
|
|
extern void serial_standalone_init(void);
|
|
extern void serial_set_clock_src(serial_t *dev, double clock_src);
|
|
extern void serial_reset_port(serial_t *dev);
|
|
extern void serial_device_timeout(void *priv);
|
|
|
|
extern void serial_set_cts(serial_t *dev, uint8_t enabled);
|
|
extern void serial_set_dsr(serial_t *dev, uint8_t enabled);
|
|
extern void serial_set_dcd(serial_t *dev, uint8_t enabled);
|
|
|
|
extern const device_t ns8250_device;
|
|
extern const device_t ns8250_pcjr_device;
|
|
extern const device_t ns16450_device;
|
|
extern const device_t ns16550_device;
|
|
extern const device_t ns16650_device;
|
|
extern const device_t ns16750_device;
|
|
extern const device_t ns16850_device;
|
|
extern const device_t ns16950_device;
|
|
|
|
#endif /*EMU_SERIAL_H*/
|