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ClassicOS/kernel/parallel.h
Gregory Bowne 5cf2549d58 Add parallel.h header for LPT device management
This creates the header file for a parallel port driver
2026-02-02 13:18:31 -08:00

41 lines
989 B
C

#ifndef PARALLEL_H
#define PARALLEL_H
#include <stdint.h>
#include <stdbool.h>
typedef enum {
LPT_PORT_NONE = -1,
LPT1_PORT = 0,
LPT2_PORT = 1,
LPT_MAX_PORTS = 2
} lpt_port_t;
typedef enum {
LPT_MODE_COMPAT = 0, // Standard (SPP)
LPT_MODE_BIDIR, // PS/2 bidirectional
LPT_MODE_EPP, // IEEE 1284 EPP
LPT_MODE_ECP // IEEE 1284 ECP
} lpt_mode_t;
typedef struct {
uint16_t base; // Base I/O address (e.g., 0x378, 0x278)
bool present; // Detected
lpt_mode_t mode; // Current mode
uint8_t irq; // IRQ line (if known/used)
} lpt_device_t;
extern lpt_device_t lpt_devices[LPT_MAX_PORTS];
void lpt_init_all(void);
void lpt_set_mode(lpt_port_t port, lpt_mode_t mode);
// Simple polled I/O
void lpt_write_byte(lpt_port_t port, uint8_t value);
uint8_t lpt_read_byte(lpt_port_t port);
// IRQ-driven hook (you implement the handler logic)
void lpt_irq_handler(lpt_port_t port);
#endif