/*
 * Copyright (c) 2013 Jean-Christophe Dubois <jcd@tribudubois.net>
 *
 * i.MX31 SOC emulation.
 *
 * Based on hw/arm/fsl-imx31.c
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/arm/fsl-imx31.h"
#include "sysemu/sysemu.h"
#include "exec/address-spaces.h"
#include "hw/boards.h"
#include "sysemu/char.h"

static void fsl_imx31_init(Object *obj)
{
    FslIMX31State *s = FSL_IMX31(obj);
    int i;

    object_initialize(&s->cpu, sizeof(s->cpu), "arm1136-" TYPE_ARM_CPU);

    object_initialize(&s->avic, sizeof(s->avic), TYPE_IMX_AVIC);
    qdev_set_parent_bus(DEVICE(&s->avic), sysbus_get_default());

    object_initialize(&s->ccm, sizeof(s->ccm), TYPE_IMX31_CCM);
    qdev_set_parent_bus(DEVICE(&s->ccm), sysbus_get_default());

    for (i = 0; i < FSL_IMX31_NUM_UARTS; i++) {
        object_initialize(&s->uart[i], sizeof(s->uart[i]), TYPE_IMX_SERIAL);
        qdev_set_parent_bus(DEVICE(&s->uart[i]), sysbus_get_default());
    }

    object_initialize(&s->gpt, sizeof(s->gpt), TYPE_IMX31_GPT);
    qdev_set_parent_bus(DEVICE(&s->gpt), sysbus_get_default());

    for (i = 0; i < FSL_IMX31_NUM_EPITS; i++) {
        object_initialize(&s->epit[i], sizeof(s->epit[i]), TYPE_IMX_EPIT);
        qdev_set_parent_bus(DEVICE(&s->epit[i]), sysbus_get_default());
    }

    for (i = 0; i < FSL_IMX31_NUM_I2CS; i++) {
        object_initialize(&s->i2c[i], sizeof(s->i2c[i]), TYPE_IMX_I2C);
        qdev_set_parent_bus(DEVICE(&s->i2c[i]), sysbus_get_default());
    }

    for (i = 0; i < FSL_IMX31_NUM_GPIOS; i++) {
        object_initialize(&s->gpio[i], sizeof(s->gpio[i]), TYPE_IMX_GPIO);
        qdev_set_parent_bus(DEVICE(&s->gpio[i]), sysbus_get_default());
    }
}

static void fsl_imx31_realize(DeviceState *dev, Error **errp)
{
    FslIMX31State *s = FSL_IMX31(dev);
    uint16_t i;
    Error *err = NULL;

    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }

    object_property_set_bool(OBJECT(&s->avic), true, "realized", &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }
    sysbus_mmio_map(SYS_BUS_DEVICE(&s->avic), 0, FSL_IMX31_AVIC_ADDR);
    sysbus_connect_irq(SYS_BUS_DEVICE(&s->avic), 0,
                       qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_IRQ));
    sysbus_connect_irq(SYS_BUS_DEVICE(&s->avic), 1,
                       qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_FIQ));

    object_property_set_bool(OBJECT(&s->ccm), true, "realized", &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }
    sysbus_mmio_map(SYS_BUS_DEVICE(&s->ccm), 0, FSL_IMX31_CCM_ADDR);

    /* Initialize all UARTS */
    for (i = 0; i < FSL_IMX31_NUM_UARTS; i++) {
        static const struct {
            hwaddr addr;
            unsigned int irq;
        } serial_table[FSL_IMX31_NUM_UARTS] = {
            { FSL_IMX31_UART1_ADDR, FSL_IMX31_UART1_IRQ },
            { FSL_IMX31_UART2_ADDR, FSL_IMX31_UART2_IRQ },
        };

        if (i < MAX_SERIAL_PORTS) {
            CharDriverState *chr;

            chr = serial_hds[i];

            if (!chr) {
                char label[20];
                snprintf(label, sizeof(label), "imx31.uart%d", i);
                chr = qemu_chr_new(label, "null", NULL);
            }

            qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", chr);
        }

        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized", &err);
        if (err) {
            error_propagate(errp, err);
            return;
        }

        sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart[i]), 0, serial_table[i].addr);
        sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart[i]), 0,
                           qdev_get_gpio_in(DEVICE(&s->avic),
                                            serial_table[i].irq));
    }

    s->gpt.ccm = IMX_CCM(&s->ccm);

    object_property_set_bool(OBJECT(&s->gpt), true, "realized", &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }

    sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpt), 0, FSL_IMX31_GPT_ADDR);
    sysbus_connect_irq(SYS_BUS_DEVICE(&s->gpt), 0,
                       qdev_get_gpio_in(DEVICE(&s->avic), FSL_IMX31_GPT_IRQ));

    /* Initialize all EPIT timers */
    for (i = 0; i < FSL_IMX31_NUM_EPITS; i++) {
        static const struct {
            hwaddr addr;
            unsigned int irq;
        } epit_table[FSL_IMX31_NUM_EPITS] = {
            { FSL_IMX31_EPIT1_ADDR, FSL_IMX31_EPIT1_IRQ },
            { FSL_IMX31_EPIT2_ADDR, FSL_IMX31_EPIT2_IRQ },
        };

        s->epit[i].ccm = IMX_CCM(&s->ccm);

        object_property_set_bool(OBJECT(&s->epit[i]), true, "realized", &err);
        if (err) {
            error_propagate(errp, err);
            return;
        }

        sysbus_mmio_map(SYS_BUS_DEVICE(&s->epit[i]), 0, epit_table[i].addr);
        sysbus_connect_irq(SYS_BUS_DEVICE(&s->epit[i]), 0,
                           qdev_get_gpio_in(DEVICE(&s->avic),
                                            epit_table[i].irq));
    }

    /* Initialize all I2C */
    for (i = 0; i < FSL_IMX31_NUM_I2CS; i++) {
        static const struct {
            hwaddr addr;
            unsigned int irq;
        } i2c_table[FSL_IMX31_NUM_I2CS] = {
            { FSL_IMX31_I2C1_ADDR, FSL_IMX31_I2C1_IRQ },
            { FSL_IMX31_I2C2_ADDR, FSL_IMX31_I2C2_IRQ },
            { FSL_IMX31_I2C3_ADDR, FSL_IMX31_I2C3_IRQ }
        };

        /* Initialize the I2C */
        object_property_set_bool(OBJECT(&s->i2c[i]), true, "realized", &err);
        if (err) {
            error_propagate(errp, err);
            return;
        }
        /* Map I2C memory */
        sysbus_mmio_map(SYS_BUS_DEVICE(&s->i2c[i]), 0, i2c_table[i].addr);
        /* Connect I2C IRQ to PIC */
        sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c[i]), 0,
                           qdev_get_gpio_in(DEVICE(&s->avic),
                                            i2c_table[i].irq));
    }

    /* Initialize all GPIOs */
    for (i = 0; i < FSL_IMX31_NUM_GPIOS; i++) {
        static const struct {
            hwaddr addr;
            unsigned int irq;
        } gpio_table[FSL_IMX31_NUM_GPIOS] = {
            { FSL_IMX31_GPIO1_ADDR, FSL_IMX31_GPIO1_IRQ },
            { FSL_IMX31_GPIO2_ADDR, FSL_IMX31_GPIO2_IRQ },
            { FSL_IMX31_GPIO3_ADDR, FSL_IMX31_GPIO3_IRQ }
        };

        object_property_set_bool(OBJECT(&s->gpio[i]), false, "has-edge-sel",
                                 &error_abort);
        object_property_set_bool(OBJECT(&s->gpio[i]), true, "realized", &err);
        if (err) {
            error_propagate(errp, err);
            return;
        }
        sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpio[i]), 0, gpio_table[i].addr);
        /* Connect GPIO IRQ to PIC */
        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gpio[i]), 0,
                           qdev_get_gpio_in(DEVICE(&s->avic),
                                            gpio_table[i].irq));
    }

    /* On a real system, the first 16k is a `secure boot rom' */
    memory_region_init_rom(&s->secure_rom, NULL, "imx31.secure_rom",
                           FSL_IMX31_SECURE_ROM_SIZE, &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }
    memory_region_add_subregion(get_system_memory(), FSL_IMX31_SECURE_ROM_ADDR,
                                &s->secure_rom);

    /* There is also a 16k ROM */
    memory_region_init_rom(&s->rom, NULL, "imx31.rom",
                           FSL_IMX31_ROM_SIZE, &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }
    memory_region_add_subregion(get_system_memory(), FSL_IMX31_ROM_ADDR,
                                &s->rom);

    /* initialize internal RAM (16 KB) */
    memory_region_init_ram(&s->iram, NULL, "imx31.iram", FSL_IMX31_IRAM_SIZE,
                           &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }
    memory_region_add_subregion(get_system_memory(), FSL_IMX31_IRAM_ADDR,
                                &s->iram);
    vmstate_register_ram_global(&s->iram);

    /* internal RAM (16 KB) is aliased over 256 MB - 16 KB */
    memory_region_init_alias(&s->iram_alias, NULL, "imx31.iram_alias",
                             &s->iram, 0, FSL_IMX31_IRAM_ALIAS_SIZE);
    memory_region_add_subregion(get_system_memory(), FSL_IMX31_IRAM_ALIAS_ADDR,
                                &s->iram_alias);
}

static void fsl_imx31_class_init(ObjectClass *oc, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(oc);

    dc->realize = fsl_imx31_realize;

    /*
     * Reason: creates an ARM CPU, thus use after free(), see
     * arm_cpu_class_init()
     */
    dc->cannot_destroy_with_object_finalize_yet = true;
    dc->desc = "i.MX31 SOC";
}

static const TypeInfo fsl_imx31_type_info = {
    .name = TYPE_FSL_IMX31,
    .parent = TYPE_DEVICE,
    .instance_size = sizeof(FslIMX31State),
    .instance_init = fsl_imx31_init,
    .class_init = fsl_imx31_class_init,
};

static void fsl_imx31_register_types(void)
{
    type_register_static(&fsl_imx31_type_info);
}

type_init(fsl_imx31_register_types)