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/*
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 * QEMU PC APM controller Emulation
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 * This is split out from acpi.c
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 *
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 * Copyright (c) 2006 Fabrice Bellard
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License version 2 as published by the Free Software Foundation.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, see <http://www.gnu.org/licenses/>
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 */
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#include "apm.h"
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#include "hw.h"
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//#define DEBUG
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#ifdef DEBUG
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# define APM_DPRINTF(format, ...)       printf(format, ## __VA_ARGS__)
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#else
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# define APM_DPRINTF(format, ...)       do { } while (0)
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#endif
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/* fixed I/O location */
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#define APM_CNT_IOPORT  0xb2
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#define APM_STS_IOPORT  0xb3
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static void apm_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
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{
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    APMState *apm = opaque;
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    addr &= 1;
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    APM_DPRINTF("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val);
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    if (addr == 0) {
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        apm->apmc = val;
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        if (apm->callback) {
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            (apm->callback)(val, apm->arg);
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        }
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    } else {
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        apm->apms = val;
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    }
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}
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static uint32_t apm_ioport_readb(void *opaque, uint32_t addr)
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{
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    APMState *apm = opaque;
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    uint32_t val;
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    addr &= 1;
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    if (addr == 0) {
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        val = apm->apmc;
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    } else {
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        val = apm->apms;
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    }
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    APM_DPRINTF("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val);
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    return val;
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}
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const VMStateDescription vmstate_apm = {
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    .name = "APM State",
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    .version_id = 1,
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    .minimum_version_id = 1,
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    .minimum_version_id_old = 1,
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    .fields = (VMStateField[]) {
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        VMSTATE_UINT8(apmc, APMState),
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        VMSTATE_UINT8(apms, APMState),
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        VMSTATE_END_OF_LIST()
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    }
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};
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void apm_init(APMState *apm, apm_ctrl_changed_t callback, void *arg)
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{
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    apm->callback = callback;
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    apm->arg = arg;
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    /* ioport 0xb2, 0xb3 */
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    register_ioport_write(APM_CNT_IOPORT, 2, 1, apm_ioport_writeb, apm);
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    register_ioport_read(APM_CNT_IOPORT, 2, 1, apm_ioport_readb, apm);
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}