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/*

 * QEMU 8253/8254 - internal interfaces

 *

 * Copyright (c) 2011 Jan Kiszka, Siemens AG

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#ifndef QEMU_I8254_INTERNAL_H

#define QEMU_I8254_INTERNAL_H

#include "hw.h"

#include "pc.h"

#include "isa.h"

typedef struct PITChannelState {

    int count; /* can be 65536 */

    uint16_t latched_count;

    uint8_t count_latched;

    uint8_t status_latched;

    uint8_t status;

    uint8_t read_state;

    uint8_t write_state;

    uint8_t write_latch;

    uint8_t rw_mode;

    uint8_t mode;

    uint8_t bcd; /* not supported */

    uint8_t gate; /* timer start */

    int64_t count_load_time;

    /* irq handling */

    int64_t next_transition_time;

    QEMUTimer *irq_timer;

    qemu_irq irq;

    uint32_t irq_disabled;

} PITChannelState;

typedef struct PITCommonState {

    ISADevice dev;

    MemoryRegion ioports;

    uint32_t iobase;

    PITChannelState channels[3];

} PITCommonState;

#define TYPE_PIT_COMMON "pit-common"

#define PIT_COMMON(obj) \

     OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON)

#define PIT_COMMON_CLASS(klass) \

     OBJECT_CLASS_CHECK(PITCommonClass, (klass), TYPE_PIT_COMMON)

#define PIT_COMMON_GET_CLASS(obj) \

     OBJECT_GET_CLASS(PITCommonClass, (obj), TYPE_PIT_COMMON)

typedef struct PITCommonClass {

    ISADeviceClass parent_class;

    int (*init)(PITCommonState *s);

    void (*set_channel_gate)(PITCommonState *s, PITChannelState *sc, int val);

    void (*get_channel_info)(PITCommonState *s, PITChannelState *sc,

                             PITChannelInfo *info);

    void (*pre_save)(PITCommonState *s);

    void (*post_load)(PITCommonState *s);

} PITCommonClass;

int pit_get_out(PITChannelState *s, int64_t current_time);

int64_t pit_get_next_transition_time(PITChannelState *s, int64_t current_time);

void pit_get_channel_info_common(PITCommonState *s, PITChannelState *sc,

                                 PITChannelInfo *info);

void pit_reset_common(PITCommonState *s);

#endif /* !QEMU_I8254_INTERNAL_H */