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/*

 * Power Management device simulation in PKUnity SoC

 *

 * Copyright (C) 2010-2012 Guan Xuetao

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation, or any later version.

 * See the COPYING file in the top-level directory.

 */

#include "hw.h"

#include "sysbus.h"

#undef DEBUG_PUV3

#include "puv3.h"

typedef struct {

    SysBusDevice busdev;

    MemoryRegion iomem;

    uint32_t reg_PMCR;

    uint32_t reg_PCGR;

    uint32_t reg_PLL_SYS_CFG;

    uint32_t reg_PLL_DDR_CFG;

    uint32_t reg_PLL_VGA_CFG;

    uint32_t reg_DIVCFG;

} PUV3PMState;

static uint64_t puv3_pm_read(void *opaque, target_phys_addr_t offset,

        unsigned size)

{

    PUV3PMState *s = opaque;

    uint32_t ret = 0;

    switch (offset) {

    case 0x14:

        ret = s->reg_PCGR;

        break;

    case 0x18:

        ret = s->reg_PLL_SYS_CFG;

        break;

    case 0x1c:

        ret = s->reg_PLL_DDR_CFG;

        break;

    case 0x20:

        ret = s->reg_PLL_VGA_CFG;

        break;

    case 0x24:

        ret = s->reg_DIVCFG;

        break;

    case 0x28: /* PLL SYS STATUS */

        ret = 0x00002401;

        break;

    case 0x2c: /* PLL DDR STATUS */

        ret = 0x00100c00;

        break;

    case 0x30: /* PLL VGA STATUS */

        ret = 0x00003801;

        break;

    case 0x34: /* DIV STATUS */

        ret = 0x22f52015;

        break;

    case 0x38: /* SW RESET */

        ret = 0x0;

        break;

    case 0x44: /* PLL DFC DONE */

        ret = 0x7;

        break;

    default:

        DPRINTF("Bad offset 0x%x\n", offset);

    }

    DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);

    return ret;

}

static void puv3_pm_write(void *opaque, target_phys_addr_t offset,

        uint64_t value, unsigned size)

{

    PUV3PMState *s = opaque;

    switch (offset) {

    case 0x0:

        s->reg_PMCR = value;

        break;

    case 0x14:

        s->reg_PCGR = value;

        break;

    case 0x18:

        s->reg_PLL_SYS_CFG = value;

        break;

    case 0x1c:

        s->reg_PLL_DDR_CFG = value;

        break;

    case 0x20:

        s->reg_PLL_VGA_CFG = value;

        break;

    case 0x24:

    case 0x38:

        break;

    default:

        DPRINTF("Bad offset 0x%x\n", offset);

    }

    DPRINTF("offset 0x%x, value 0x%x\n", offset, value);

}

static const MemoryRegionOps puv3_pm_ops = {

    .read = puv3_pm_read,

    .write = puv3_pm_write,

    .impl = {

        .min_access_size = 4,

        .max_access_size = 4,

    },

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static int puv3_pm_init(SysBusDevice *dev)

{

    PUV3PMState *s = FROM_SYSBUS(PUV3PMState, dev);

    s->reg_PCGR = 0x0;

    memory_region_init_io(&s->iomem, &puv3_pm_ops, s, "puv3_pm",

            PUV3_REGS_OFFSET);

    sysbus_init_mmio(dev, &s->iomem);

    return 0;

}

static void puv3_pm_class_init(ObjectClass *klass, void *data)

{

    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);

    sdc->init = puv3_pm_init;

}

static const TypeInfo puv3_pm_info = {

    .name = "puv3_pm",

    .parent = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(PUV3PMState),

    .class_init = puv3_pm_class_init,

};

static void puv3_pm_register_type(void)

{

    type_register_static(&puv3_pm_info);

}

type_init(puv3_pm_register_type)