system.h

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/*
 * Copyright (c) 2022 Adrian "asie" Siekierka
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#ifndef __WF_LIBWS_SYSTEM_H__
#define __WF_LIBWS_SYSTEM_H__
 
#include <stdbool.h>
#include <stdint.h>
#include "util.h"
#include "hardware.h"
 
static inline bool ws_system_is_color(void) {
    return inportb(IO_SYSTEM_CTRL1) & SYSTEM_CTRL1_COLOR;
}
 
static inline bool ws_system_color_active(void) {
    return ws_system_is_color() && (inportb(IO_SYSTEM_CTRL2) & 0x80);
}
 
typedef enum {
    WS_MODEL_MONO = 0x00,
 
    WS_MODEL_PCV2 = 0x01,
 
    WS_MODEL_COLOR = 0x82,
 
    WS_MODEL_CRYSTAL = 0x83,
} ws_system_model_t;
 
ws_system_model_t ws_system_get_model(void);
 
typedef enum {
    WS_MODE_MONO = 0x00,
    
    WS_MODE_COLOR = 0x80,
 
    WS_MODE_COLOR_4BPP = 0xC0,
 
    WS_MODE_COLOR_4BPP_PACKED = 0xE0
} ws_system_mode_t;
 
static inline ws_system_mode_t ws_system_mode_get(void) {
    return inportb(IO_SYSTEM_CTRL2) & 0xE0;
}
 
bool ws_system_mode_set(ws_system_mode_t mode);
 
// Legacy defines. TODO: Remove
#define ws_mode_t ws_system_mode_t
#define ws_mode_get ws_system_mode_get
#define ws_mode_set ws_system_mode_set
 
typedef __attribute__((interrupt)) void __far (*ws_int_handler_t)(void);
 
void ws_cpuint_set_handler(uint8_t idx, ws_int_handler_t handler);
 
void ws_hwint_set_handler(uint8_t idx, ws_int_handler_t handler);
 
void ws_hwint_set_default_handler_serial_tx(void);
void ws_hwint_set_default_handler_key(void);
void ws_hwint_set_default_handler_serial_rx(void);
void ws_hwint_set_default_handler_line(void);
void ws_hwint_set_default_handler_vblank_timer(void);
void ws_hwint_set_default_handler_vblank(void);
void ws_hwint_set_default_handler_hblank_timer(void);
 
static inline void ws_hwint_set(uint8_t mask) {
    outportb(IO_HWINT_ENABLE, mask);
}
 
static inline uint8_t ws_hwint_push(uint8_t mask) {
    uint8_t prev_mask = inportb(IO_HWINT_ENABLE);
    outportb(IO_HWINT_ENABLE, mask);
    return prev_mask;
}
#define ws_hwint_pop ws_hwint_push
 
void ws_hwint_enable(uint8_t mask);
 
void ws_hwint_disable(uint8_t mask);
 
static inline void ws_hwint_disable_all(void) {
    ws_hwint_disable(0xFF);
}
 
static inline void ws_hwint_ack(uint8_t mask) {
    outportb(IO_HWINT_ACK, mask);
}
 
#endif /* __WF_LIBWS_SYSTEM_H__ */