d152e92648
The 82C606 SuperIO allows reconfiguring the interrupt line used for the UART alarm at runtime, including disabling it altogether. While at that, correct the type in the serial_setup() prototype to be the same as serial_t.irq uses.
95 lines
2.6 KiB
C
95 lines
2.6 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 UART emulation.
|
|
*
|
|
*
|
|
*
|
|
* Author: Sarah Walker, <http://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_NS16450 2
|
|
#define SERIAL_NS16550 3
|
|
|
|
/* Default settings for the standard ports. */
|
|
#define SERIAL1_ADDR 0x03f8
|
|
#define SERIAL1_IRQ 4
|
|
#define SERIAL2_ADDR 0x02f8
|
|
#define SERIAL2_IRQ 3
|
|
#define SERIAL3_ADDR 0x03e8
|
|
#define SERIAL3_IRQ 4
|
|
#define SERIAL4_ADDR 0x02e8
|
|
#define SERIAL4_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, pad;
|
|
|
|
uint16_t dlab, base_address;
|
|
|
|
uint8_t rcvr_fifo_pos, xmit_fifo_pos,
|
|
pad0, pad1,
|
|
rcvr_fifo[16], xmit_fifo[16];
|
|
|
|
pc_timer_t transmit_timer, timeout_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 *priv;
|
|
serial_t *serial;
|
|
} serial_device_t;
|
|
|
|
|
|
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 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 const device_t i8250_device;
|
|
extern const device_t i8250_pcjr_device;
|
|
extern const device_t ns16450_device;
|
|
extern const device_t ns16550_device;
|
|
|
|
|
|
#endif /*EMU_SERIAL_H*/
|