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 LIBWS_SYSTEM_H_
#define LIBWS_SYSTEM_H_



#define WS_INT_UART_TX 0
#define WS_INT_KEY_SCAN 1
#define WS_INT_CARTRIDGE 2
#define WS_INT_UART_RX 3
#define WS_INT_LINE_MATCH 4
#define WS_INT_VBL_TIMER 5
#define WS_INT_VBLANK 6
#define WS_INT_HBL_TIMER 7
 
#ifndef __ASSEMBLER__
 
#include <stdbool.h>
#include <stdint.h>
#include <wonderful.h>
#include "util.h"
#include "ports.h"

static inline bool ws_system_is_color_model(void) {
    return inportb(WS_SYSTEM_CTRL_PORT) & WS_SYSTEM_CTRL_MODEL_COLOR;
}

static inline bool ws_system_is_color_active(void) {
    return ws_system_is_color_model() && (inportb(WS_SYSTEM_CTRL_COLOR_PORT) & 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_get_mode(void) {
    return inportb(WS_SYSTEM_CTRL_COLOR_PORT) & 0xE0;
}

bool ws_system_set_mode(ws_system_mode_t mode);

void ws_int_set_handler(uint8_t idx, ia16_int_handler_t handler);

void ws_int_set_default_handler_serial_tx(void);
void ws_int_set_default_handler_key(void);
void ws_int_set_default_handler_serial_rx(void);
void ws_int_set_default_handler_line(void);
void ws_int_set_default_handler_vblank_timer(void);
void ws_int_set_default_handler_vblank(void);
void ws_int_set_default_handler_hblank_timer(void);

static inline void ws_int_set_enabled(uint8_t mask) {
    outportb(WS_INT_ENABLE_PORT, mask);
}
 
static inline uint8_t ws_int_push_set_enabled(uint8_t mask) {
    uint8_t prev_mask = inportb(WS_INT_ENABLE_PORT);
    outportb(WS_INT_ENABLE_PORT, mask);
    return prev_mask;
}
#define ws_int_pop_enabled ws_int_enable_set

void ws_int_enable(uint8_t mask);

void ws_int_disable(uint8_t mask);

static inline void ws_int_disable_all(void) {
    ws_int_disable(0xFF);
}

static inline void ws_int_ack(uint8_t mask) {
    outportb(WS_INT_ACK_PORT, mask);
}
 
#endif

 
#endif /* LIBWS_SYSTEM_H_ */