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/*

 *  Samsung exynos4210 SoC emulation

 *

 *  Copyright (c) 2011 Samsung Electronics Co., Ltd. All rights reserved.

 *    Maksim Kozlov <m.kozlov@samsung.com>

 *    Evgeny Voevodin <e.voevodin@samsung.com>

 *    Igor Mitsyanko  <i.mitsyanko@samsung.com>

 *

 *  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 "hw/boards.h"

#include "sysemu/sysemu.h"

#include "hw/sysbus.h"

#include "hw/arm/arm.h"

#include "hw/loader.h"

#include "hw/arm/exynos4210.h"

#include "hw/usb/hcd-ehci.h"

#define EXYNOS4210_CHIPID_ADDR         0x10000000

/* PWM */

#define EXYNOS4210_PWM_BASE_ADDR       0x139D0000

/* RTC */

#define EXYNOS4210_RTC_BASE_ADDR       0x10070000

/* MCT */

#define EXYNOS4210_MCT_BASE_ADDR       0x10050000

/* I2C */

#define EXYNOS4210_I2C_SHIFT           0x00010000

#define EXYNOS4210_I2C_BASE_ADDR       0x13860000

/* Interrupt Group of External Interrupt Combiner for I2C */

#define EXYNOS4210_I2C_INTG            27

#define EXYNOS4210_HDMI_INTG           16

/* UART's definitions */

#define EXYNOS4210_UART0_BASE_ADDR     0x13800000

#define EXYNOS4210_UART1_BASE_ADDR     0x13810000

#define EXYNOS4210_UART2_BASE_ADDR     0x13820000

#define EXYNOS4210_UART3_BASE_ADDR     0x13830000

#define EXYNOS4210_UART0_FIFO_SIZE     256

#define EXYNOS4210_UART1_FIFO_SIZE     64

#define EXYNOS4210_UART2_FIFO_SIZE     16

#define EXYNOS4210_UART3_FIFO_SIZE     16

/* Interrupt Group of External Interrupt Combiner for UART */

#define EXYNOS4210_UART_INT_GRP        26

/* External GIC */

#define EXYNOS4210_EXT_GIC_CPU_BASE_ADDR    0x10480000

#define EXYNOS4210_EXT_GIC_DIST_BASE_ADDR   0x10490000

/* Combiner */

#define EXYNOS4210_EXT_COMBINER_BASE_ADDR   0x10440000

#define EXYNOS4210_INT_COMBINER_BASE_ADDR   0x10448000

/* PMU SFR base address */

#define EXYNOS4210_PMU_BASE_ADDR            0x10020000

/* Display controllers (FIMD) */

#define EXYNOS4210_FIMD0_BASE_ADDR          0x11C00000

/* EHCI */

#define EXYNOS4210_EHCI_BASE_ADDR           0x12580000

static uint8_t chipid_and_omr[] = { 0x11, 0x02, 0x21, 0x43,

                                    0x09, 0x00, 0x00, 0x00 };

static uint64_t exynos4210_chipid_and_omr_read(void *opaque, hwaddr offset,

                                               unsigned size)

{

    assert(offset < sizeof(chipid_and_omr));

    return chipid_and_omr[offset];

}

static void exynos4210_chipid_and_omr_write(void *opaque, hwaddr offset,

                                            uint64_t value, unsigned size)

{

    return;

}

static const MemoryRegionOps exynos4210_chipid_and_omr_ops = {

    .read = exynos4210_chipid_and_omr_read,

    .write = exynos4210_chipid_and_omr_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

    .impl = {

        .max_access_size = 1,

    }

};

void exynos4210_write_secondary(ARMCPU *cpu,

        const struct arm_boot_info *info)

{

    int n;

    uint32_t smpboot[] = {

        0xe59f3034, /* ldr r3, External gic_cpu_if */

        0xe59f2034, /* ldr r2, Internal gic_cpu_if */

        0xe59f0034, /* ldr r0, startaddr */

        0xe3a01001, /* mov r1, #1 */

        0xe5821000, /* str r1, [r2] */

        0xe5831000, /* str r1, [r3] */

        0xe3a010ff, /* mov r1, #0xff */

        0xe5821004, /* str r1, [r2, #4] */

        0xe5831004, /* str r1, [r3, #4] */

        0xf57ff04f, /* dsb */

        0xe320f003, /* wfi */

        0xe5901000, /* ldr     r1, [r0] */

        0xe1110001, /* tst     r1, r1 */

        0x0afffffb, /* beq     <wfi> */

        0xe12fff11, /* bx      r1 */

        EXYNOS4210_EXT_GIC_CPU_BASE_ADDR,

        0,          /* gic_cpu_if: base address of Internal GIC CPU interface */

        0           /* bootreg: Boot register address is held here */

    };

    smpboot[ARRAY_SIZE(smpboot) - 1] = info->smp_bootreg_addr;

    smpboot[ARRAY_SIZE(smpboot) - 2] = info->gic_cpu_if_addr;

    for (n = 0; n < ARRAY_SIZE(smpboot); n++) {

        smpboot[n] = tswap32(smpboot[n]);

    }

    rom_add_blob_fixed("smpboot", smpboot, sizeof(smpboot),

                       info->smp_loader_start);

}

Exynos4210State *exynos4210_init(MemoryRegion *system_mem,

        unsigned long ram_size)

{

    qemu_irq cpu_irq[EXYNOS4210_NCPUS];

    int i, n;

    Exynos4210State *s = g_new(Exynos4210State, 1);

    qemu_irq *irqp;

    qemu_irq gate_irq[EXYNOS4210_NCPUS][EXYNOS4210_IRQ_GATE_NINPUTS];

    unsigned long mem_size;

    DeviceState *dev;

    SysBusDevice *busdev;

    for (n = 0; n < EXYNOS4210_NCPUS; n++) {

        s->cpu[n] = cpu_arm_init("cortex-a9");

        if (!s->cpu[n]) {

            fprintf(stderr, "Unable to find CPU %d definition\n", n);

            exit(1);

        }

        /* Create PIC controller for each processor instance */

        irqp = arm_pic_init_cpu(s->cpu[n]);

        /*

         * Get GICs gpio_in cpu_irq to connect a combiner to them later.

         * Use only IRQ for a while.

         */

        cpu_irq[n] = irqp[ARM_PIC_CPU_IRQ];

    }

    /*** IRQs ***/

    s->irq_table = exynos4210_init_irq(&s->irqs);

    /* IRQ Gate */

    for (i = 0; i < EXYNOS4210_NCPUS; i++) {

        dev = qdev_create(NULL, "exynos4210.irq_gate");

        qdev_prop_set_uint32(dev, "n_in", EXYNOS4210_IRQ_GATE_NINPUTS);

        qdev_init_nofail(dev);

        /* Get IRQ Gate input in gate_irq */

        for (n = 0; n < EXYNOS4210_IRQ_GATE_NINPUTS; n++) {

            gate_irq[i][n] = qdev_get_gpio_in(dev, n);

        }

        busdev = SYS_BUS_DEVICE(dev);

        /* Connect IRQ Gate output to cpu_irq */

        sysbus_connect_irq(busdev, 0, cpu_irq[i]);

    }

    /* Private memory region and Internal GIC */

    dev = qdev_create(NULL, "a9mpcore_priv");

    qdev_prop_set_uint32(dev, "num-cpu", EXYNOS4210_NCPUS);

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    sysbus_mmio_map(busdev, 0, EXYNOS4210_SMP_PRIVATE_BASE_ADDR);

    for (n = 0; n < EXYNOS4210_NCPUS; n++) {

        sysbus_connect_irq(busdev, n, gate_irq[n][0]);

    }

    for (n = 0; n < EXYNOS4210_INT_GIC_NIRQ; n++) {

        s->irqs.int_gic_irq[n] = qdev_get_gpio_in(dev, n);

    }

    /* Cache controller */

    sysbus_create_simple("l2x0", EXYNOS4210_L2X0_BASE_ADDR, NULL);

    /* External GIC */

    dev = qdev_create(NULL, "exynos4210.gic");

    qdev_prop_set_uint32(dev, "num-cpu", EXYNOS4210_NCPUS);

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    /* Map CPU interface */

    sysbus_mmio_map(busdev, 0, EXYNOS4210_EXT_GIC_CPU_BASE_ADDR);

    /* Map Distributer interface */

    sysbus_mmio_map(busdev, 1, EXYNOS4210_EXT_GIC_DIST_BASE_ADDR);

    for (n = 0; n < EXYNOS4210_NCPUS; n++) {

        sysbus_connect_irq(busdev, n, gate_irq[n][1]);

    }

    for (n = 0; n < EXYNOS4210_EXT_GIC_NIRQ; n++) {

        s->irqs.ext_gic_irq[n] = qdev_get_gpio_in(dev, n);

    }

    /* Internal Interrupt Combiner */

    dev = qdev_create(NULL, "exynos4210.combiner");

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    for (n = 0; n < EXYNOS4210_MAX_INT_COMBINER_OUT_IRQ; n++) {

        sysbus_connect_irq(busdev, n, s->irqs.int_gic_irq[n]);

    }

    exynos4210_combiner_get_gpioin(&s->irqs, dev, 0);

    sysbus_mmio_map(busdev, 0, EXYNOS4210_INT_COMBINER_BASE_ADDR);

    /* External Interrupt Combiner */

    dev = qdev_create(NULL, "exynos4210.combiner");

    qdev_prop_set_uint32(dev, "external", 1);

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    for (n = 0; n < EXYNOS4210_MAX_INT_COMBINER_OUT_IRQ; n++) {

        sysbus_connect_irq(busdev, n, s->irqs.ext_gic_irq[n]);

    }

    exynos4210_combiner_get_gpioin(&s->irqs, dev, 1);

    sysbus_mmio_map(busdev, 0, EXYNOS4210_EXT_COMBINER_BASE_ADDR);

    /* Initialize board IRQs. */

    exynos4210_init_board_irqs(&s->irqs);

    /*** Memory ***/

    /* Chip-ID and OMR */

    memory_region_init_io(&s->chipid_mem, NULL, &exynos4210_chipid_and_omr_ops,

        NULL, "exynos4210.chipid", sizeof(chipid_and_omr));

    memory_region_add_subregion(system_mem, EXYNOS4210_CHIPID_ADDR,

                                &s->chipid_mem);

    /* Internal ROM */

    memory_region_init_ram(&s->irom_mem, NULL, "exynos4210.irom",

                           EXYNOS4210_IROM_SIZE);

    vmstate_register_ram_global(&s->irom_mem);

    memory_region_set_readonly(&s->irom_mem, true);

    memory_region_add_subregion(system_mem, EXYNOS4210_IROM_BASE_ADDR,

                                &s->irom_mem);

    /* mirror of iROM */

    memory_region_init_alias(&s->irom_alias_mem, NULL, "exynos4210.irom_alias",

                             &s->irom_mem,

                             0,

                             EXYNOS4210_IROM_SIZE);

    memory_region_set_readonly(&s->irom_alias_mem, true);

    memory_region_add_subregion(system_mem, EXYNOS4210_IROM_MIRROR_BASE_ADDR,

                                &s->irom_alias_mem);

    /* Internal RAM */

    memory_region_init_ram(&s->iram_mem, NULL, "exynos4210.iram",

                           EXYNOS4210_IRAM_SIZE);

    vmstate_register_ram_global(&s->iram_mem);

    memory_region_add_subregion(system_mem, EXYNOS4210_IRAM_BASE_ADDR,

                                &s->iram_mem);

    /* DRAM */

    mem_size = ram_size;

    if (mem_size > EXYNOS4210_DRAM_MAX_SIZE) {

        memory_region_init_ram(&s->dram1_mem, NULL, "exynos4210.dram1",

                mem_size - EXYNOS4210_DRAM_MAX_SIZE);

        vmstate_register_ram_global(&s->dram1_mem);

        memory_region_add_subregion(system_mem, EXYNOS4210_DRAM1_BASE_ADDR,

                &s->dram1_mem);

        mem_size = EXYNOS4210_DRAM_MAX_SIZE;

    }

    memory_region_init_ram(&s->dram0_mem, NULL, "exynos4210.dram0", mem_size);

    vmstate_register_ram_global(&s->dram0_mem);

    memory_region_add_subregion(system_mem, EXYNOS4210_DRAM0_BASE_ADDR,

            &s->dram0_mem);

   /* PMU.

    * The only reason of existence at the moment is that secondary CPU boot

    * loader uses PMU INFORM5 register as a holding pen.

    */

    sysbus_create_simple("exynos4210.pmu", EXYNOS4210_PMU_BASE_ADDR, NULL);

    /* PWM */

    sysbus_create_varargs("exynos4210.pwm", EXYNOS4210_PWM_BASE_ADDR,

                          s->irq_table[exynos4210_get_irq(22, 0)],

                          s->irq_table[exynos4210_get_irq(22, 1)],

                          s->irq_table[exynos4210_get_irq(22, 2)],

                          s->irq_table[exynos4210_get_irq(22, 3)],

                          s->irq_table[exynos4210_get_irq(22, 4)],

                          NULL);

    /* RTC */

    sysbus_create_varargs("exynos4210.rtc", EXYNOS4210_RTC_BASE_ADDR,

                          s->irq_table[exynos4210_get_irq(23, 0)],

                          s->irq_table[exynos4210_get_irq(23, 1)],

                          NULL);

    /* Multi Core Timer */

    dev = qdev_create(NULL, "exynos4210.mct");

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    for (n = 0; n < 4; n++) {

        /* Connect global timer interrupts to Combiner gpio_in */

        sysbus_connect_irq(busdev, n,

                s->irq_table[exynos4210_get_irq(1, 4 + n)]);

    }

    /* Connect local timer interrupts to Combiner gpio_in */

    sysbus_connect_irq(busdev, 4,

            s->irq_table[exynos4210_get_irq(51, 0)]);

    sysbus_connect_irq(busdev, 5,

            s->irq_table[exynos4210_get_irq(35, 3)]);

    sysbus_mmio_map(busdev, 0, EXYNOS4210_MCT_BASE_ADDR);

    /*** I2C ***/

    for (n = 0; n < EXYNOS4210_I2C_NUMBER; n++) {

        uint32_t addr = EXYNOS4210_I2C_BASE_ADDR + EXYNOS4210_I2C_SHIFT * n;

        qemu_irq i2c_irq;

        if (n < 8) {

            i2c_irq = s->irq_table[exynos4210_get_irq(EXYNOS4210_I2C_INTG, n)];

        } else {

            i2c_irq = s->irq_table[exynos4210_get_irq(EXYNOS4210_HDMI_INTG, 1)];

        }

        dev = qdev_create(NULL, "exynos4210.i2c");

        qdev_init_nofail(dev);

        busdev = SYS_BUS_DEVICE(dev);

        sysbus_connect_irq(busdev, 0, i2c_irq);

        sysbus_mmio_map(busdev, 0, addr);

        s->i2c_if[n] = (i2c_bus *)qdev_get_child_bus(dev, "i2c");

    }

    /*** UARTs ***/

    exynos4210_uart_create(EXYNOS4210_UART0_BASE_ADDR,

                           EXYNOS4210_UART0_FIFO_SIZE, 0, NULL,

                  s->irq_table[exynos4210_get_irq(EXYNOS4210_UART_INT_GRP, 0)]);

    exynos4210_uart_create(EXYNOS4210_UART1_BASE_ADDR,

                           EXYNOS4210_UART1_FIFO_SIZE, 1, NULL,

                  s->irq_table[exynos4210_get_irq(EXYNOS4210_UART_INT_GRP, 1)]);

    exynos4210_uart_create(EXYNOS4210_UART2_BASE_ADDR,

                           EXYNOS4210_UART2_FIFO_SIZE, 2, NULL,

                  s->irq_table[exynos4210_get_irq(EXYNOS4210_UART_INT_GRP, 2)]);

    exynos4210_uart_create(EXYNOS4210_UART3_BASE_ADDR,

                           EXYNOS4210_UART3_FIFO_SIZE, 3, NULL,

                  s->irq_table[exynos4210_get_irq(EXYNOS4210_UART_INT_GRP, 3)]);

    /*** Display controller (FIMD) ***/

    sysbus_create_varargs("exynos4210.fimd", EXYNOS4210_FIMD0_BASE_ADDR,

            s->irq_table[exynos4210_get_irq(11, 0)],

            s->irq_table[exynos4210_get_irq(11, 1)],

            s->irq_table[exynos4210_get_irq(11, 2)],

            NULL);

    sysbus_create_simple(TYPE_EXYNOS4210_EHCI, EXYNOS4210_EHCI_BASE_ADDR,

            s->irq_table[exynos4210_get_irq(28, 3)]);

    return s;

}