/*
 * ARM RealView Baseboard System emulation.
 *
 * Copyright (c) 2006-2007 CodeSourcery.
 * Written by Paul Brook
 *
 * This code is licenced under the GPL.
 */

#include "sysbus.h"
#include "arm-misc.h"
#include "primecell.h"
#include "devices.h"
#include "pci.h"
#include "usb-ohci.h"
#include "net.h"
#include "sysemu.h"
#include "boards.h"
#include "bitbang_i2c.h"
#include "sysbus.h"
#include "blockdev.h"

#define SMP_BOOT_ADDR 0xe0000000

typedef struct {
    SysBusDevice busdev;
    bitbang_i2c_interface *bitbang;
    int out;
    int in;
} RealViewI2CState;

static uint32_t realview_i2c_read(void *opaque, target_phys_addr_t offset)
{
    RealViewI2CState *s = (RealViewI2CState *)opaque;

    if (offset == 0) {
        return (s->out & 1) | (s->in << 1);
    } else {
        hw_error("realview_i2c_read: Bad offset 0x%x\n", (int)offset);
        return -1;
    }
}

static void realview_i2c_write(void *opaque, target_phys_addr_t offset,
                               uint32_t value)
{
    RealViewI2CState *s = (RealViewI2CState *)opaque;

    switch (offset) {
    case 0:
        s->out |= value & 3;
        break;
    case 4:
        s->out &= ~value;
        break;
    default:
        hw_error("realview_i2c_write: Bad offset 0x%x\n", (int)offset);
    }
    bitbang_i2c_set(s->bitbang, BITBANG_I2C_SCL, (s->out & 1) != 0);
    s->in = bitbang_i2c_set(s->bitbang, BITBANG_I2C_SDA, (s->out & 2) != 0);
}

static CPUReadMemoryFunc * const realview_i2c_readfn[] = {
   realview_i2c_read,
   realview_i2c_read,
   realview_i2c_read
};

static CPUWriteMemoryFunc * const realview_i2c_writefn[] = {
   realview_i2c_write,
   realview_i2c_write,
   realview_i2c_write
};

static int realview_i2c_init(SysBusDevice *dev)
{
    RealViewI2CState *s = FROM_SYSBUS(RealViewI2CState, dev);
    i2c_bus *bus;
    int iomemtype;

    bus = i2c_init_bus(&dev->qdev, "i2c");
    s->bitbang = bitbang_i2c_init(bus);
    iomemtype = cpu_register_io_memory(realview_i2c_readfn,
                                       realview_i2c_writefn, s,
                                       DEVICE_NATIVE_ENDIAN);
    sysbus_init_mmio(dev, 0x1000, iomemtype);
    return 0;
}

static SysBusDeviceInfo realview_i2c_info = {
    .init = realview_i2c_init,
    .qdev.name  = "realview_i2c",
    .qdev.size  = sizeof(RealViewI2CState),
};

static void realview_register_devices(void)
{
    sysbus_register_withprop(&realview_i2c_info);
}

/* Board init.  */

static struct arm_boot_info realview_binfo = {
    .smp_loader_start = SMP_BOOT_ADDR,
};

static void secondary_cpu_reset(void *opaque)
{
  CPUState *env = opaque;

  cpu_reset(env);
  /* Set entry point for secondary CPUs.  This assumes we're using
     the init code from arm_boot.c.  Real hardware resets all CPUs
     the same.  */
  env->regs[15] = SMP_BOOT_ADDR;
}

/* The following two lists must be consistent.  */
enum realview_board_type {
    BOARD_EB,
    BOARD_EB_MPCORE,
    BOARD_PB_A8,
    BOARD_PBX_A9,
};

static const int realview_board_id[] = {
    0x33b,
    0x33b,
    0x769,
    0x76d
};

static void realview_init(ram_addr_t ram_size,
                     const char *boot_device,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model,
                     enum realview_board_type board_type)
{
    CPUState *env = NULL;
    ram_addr_t ram_offset;
    DeviceState *dev, *sysctl, *gpio2;
    SysBusDevice *busdev;
    qemu_irq *irqp;
    qemu_irq pic[64];
    qemu_irq mmc_irq[2];
    PCIBus *pci_bus;
    NICInfo *nd;
    i2c_bus *i2c;
    int n;
    int done_nic = 0;
    qemu_irq cpu_irq[4];
    int is_mpcore = 0;
    int is_pb = 0;
    uint32_t proc_id = 0;
    uint32_t sys_id;
    ram_addr_t low_ram_size;

    switch (board_type) {
    case BOARD_EB:
        break;
    case BOARD_EB_MPCORE:
        is_mpcore = 1;
        break;
    case BOARD_PB_A8:
        is_pb = 1;
        break;
    case BOARD_PBX_A9:
        is_mpcore = 1;
        is_pb = 1;
        break;
    }
    for (n = 0; n < smp_cpus; n++) {
        env = cpu_init(cpu_model);
        if (!env) {
            fprintf(stderr, "Unable to find CPU definition\n");
            exit(1);
        }
        irqp = arm_pic_init_cpu(env);
        cpu_irq[n] = irqp[ARM_PIC_CPU_IRQ];
        if (n > 0) {
            qemu_register_reset(secondary_cpu_reset, env);
        }
    }
    if (arm_feature(env, ARM_FEATURE_V7)) {
        if (is_mpcore) {
            proc_id = 0x0c000000;
        } else {
            proc_id = 0x0e000000;
        }
    } else if (arm_feature(env, ARM_FEATURE_V6K)) {
        proc_id = 0x06000000;
    } else if (arm_feature(env, ARM_FEATURE_V6)) {
        proc_id = 0x04000000;
    } else {
        proc_id = 0x02000000;
    }

    if (is_pb && ram_size > 0x20000000) {
        /* Core tile RAM.  */
        low_ram_size = ram_size - 0x20000000;
        ram_size = 0x20000000;
        ram_offset = qemu_ram_alloc(NULL, "realview.lowmem", low_ram_size);
        cpu_register_physical_memory(0x20000000, low_ram_size,
                                     ram_offset | IO_MEM_RAM);
    }

    ram_offset = qemu_ram_alloc(NULL, "realview.highmem", ram_size);
    low_ram_size = ram_size;
    if (low_ram_size > 0x10000000)
      low_ram_size = 0x10000000;
    /* SDRAM at address zero.  */
    cpu_register_physical_memory(0, low_ram_size, ram_offset | IO_MEM_RAM);
    if (is_pb) {
        /* And again at a high address.  */
        cpu_register_physical_memory(0x70000000, ram_size,
                                     ram_offset | IO_MEM_RAM);
    } else {
        ram_size = low_ram_size;
    }

    sys_id = is_pb ? 0x01780500 : 0xc1400400;
    sysctl = qdev_create(NULL, "realview_sysctl");
    qdev_prop_set_uint32(sysctl, "sys_id", sys_id);
    qdev_init_nofail(sysctl);
    qdev_prop_set_uint32(sysctl, "proc_id", proc_id);
    sysbus_mmio_map(sysbus_from_qdev(sysctl), 0, 0x10000000);

    if (is_mpcore) {
        dev = qdev_create(NULL, is_pb ? "a9mpcore_priv": "realview_mpcore");
        qdev_prop_set_uint32(dev, "num-cpu", smp_cpus);
        qdev_init_nofail(dev);
        busdev = sysbus_from_qdev(dev);
        if (is_pb) {
            realview_binfo.smp_priv_base = 0x1f000000;
        } else {
            realview_binfo.smp_priv_base = 0x10100000;
        }
        sysbus_mmio_map(busdev, 0, realview_binfo.smp_priv_base);
        for (n = 0; n < smp_cpus; n++) {
            sysbus_connect_irq(busdev, n, cpu_irq[n]);
        }
    } else {
        uint32_t gic_addr = is_pb ? 0x1e000000 : 0x10040000;
        /* For now just create the nIRQ GIC, and ignore the others.  */
        dev = sysbus_create_simple("realview_gic", gic_addr, cpu_irq[0]);
    }
    for (n = 0; n < 64; n++) {
        pic[n] = qdev_get_gpio_in(dev, n);
    }

    sysbus_create_simple("pl050_keyboard", 0x10006000, pic[20]);
    sysbus_create_simple("pl050_mouse", 0x10007000, pic[21]);

    sysbus_create_simple("pl011", 0x10009000, pic[12]);
    sysbus_create_simple("pl011", 0x1000a000, pic[13]);
    sysbus_create_simple("pl011", 0x1000b000, pic[14]);
    sysbus_create_simple("pl011", 0x1000c000, pic[15]);

    /* DMA controller is optional, apparently.  */
    sysbus_create_simple("pl081", 0x10030000, pic[24]);

    sysbus_create_simple("sp804", 0x10011000, pic[4]);
    sysbus_create_simple("sp804", 0x10012000, pic[5]);

    sysbus_create_simple("pl061", 0x10013000, pic[6]);
    sysbus_create_simple("pl061", 0x10014000, pic[7]);
    gpio2 = sysbus_create_simple("pl061", 0x10015000, pic[8]);

    sysbus_create_simple("pl110_versatile", 0x10020000, pic[23]);

    dev = sysbus_create_varargs("pl181", 0x10005000, pic[17], pic[18], NULL);
    /* Wire up MMC card detect and read-only signals. These have
     * to go to both the PL061 GPIO and the sysctl register.
     * Note that the PL181 orders these lines (readonly,inserted)
     * and the PL061 has them the other way about. Also the card
     * detect line is inverted.
     */
    mmc_irq[0] = qemu_irq_split(
        qdev_get_gpio_in(sysctl, ARM_SYSCTL_GPIO_MMC_WPROT),
        qdev_get_gpio_in(gpio2, 1));
    mmc_irq[1] = qemu_irq_split(
        qdev_get_gpio_in(sysctl, ARM_SYSCTL_GPIO_MMC_CARDIN),
        qemu_irq_invert(qdev_get_gpio_in(gpio2, 0)));
    qdev_connect_gpio_out(dev, 0, mmc_irq[0]);
    qdev_connect_gpio_out(dev, 1, mmc_irq[1]);

    sysbus_create_simple("pl031", 0x10017000, pic[10]);

    if (!is_pb) {
        dev = sysbus_create_varargs("realview_pci", 0x60000000,
                                    pic[48], pic[49], pic[50], pic[51], NULL);
        pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci");
        if (usb_enabled) {
            usb_ohci_init_pci(pci_bus, -1);
        }
        n = drive_get_max_bus(IF_SCSI);
        while (n >= 0) {
            pci_create_simple(pci_bus, -1, "lsi53c895a");
            n--;
        }
    }
    for(n = 0; n < nb_nics; n++) {
        nd = &nd_table[n];

        if ((!nd->model && !done_nic)
            || strcmp(nd->model, is_pb ? "lan9118" : "smc91c111") == 0) {
            if (is_pb) {
                lan9118_init(nd, 0x4e000000, pic[28]);
            } else {
                smc91c111_init(nd, 0x4e000000, pic[28]);
            }
            done_nic = 1;
        } else {
            pci_nic_init_nofail(nd, "rtl8139", NULL);
        }
    }

    dev = sysbus_create_simple("realview_i2c", 0x10002000, NULL);
    i2c = (i2c_bus *)qdev_get_child_bus(dev, "i2c");
    i2c_create_slave(i2c, "ds1338", 0x68);

    /* Memory map for RealView Emulation Baseboard:  */
    /* 0x10000000 System registers.  */
    /*  0x10001000 System controller.  */
    /* 0x10002000 Two-Wire Serial Bus.  */
    /* 0x10003000 Reserved.  */
    /*  0x10004000 AACI.  */
    /*  0x10005000 MCI.  */
    /* 0x10006000 KMI0.  */
    /* 0x10007000 KMI1.  */
    /*  0x10008000 Character LCD. (EB) */
    /* 0x10009000 UART0.  */
    /* 0x1000a000 UART1.  */
    /* 0x1000b000 UART2.  */
    /* 0x1000c000 UART3.  */
    /*  0x1000d000 SSPI.  */
    /*  0x1000e000 SCI.  */
    /* 0x1000f000 Reserved.  */
    /*  0x10010000 Watchdog.  */
    /* 0x10011000 Timer 0+1.  */
    /* 0x10012000 Timer 2+3.  */
    /*  0x10013000 GPIO 0.  */
    /*  0x10014000 GPIO 1.  */
    /*  0x10015000 GPIO 2.  */
    /*  0x10002000 Two-Wire Serial Bus - DVI. (PB) */
    /* 0x10017000 RTC.  */
    /*  0x10018000 DMC.  */
    /*  0x10019000 PCI controller config.  */
    /*  0x10020000 CLCD.  */
    /* 0x10030000 DMA Controller.  */
    /* 0x10040000 GIC1. (EB) */
    /*  0x10050000 GIC2. (EB) */
    /*  0x10060000 GIC3. (EB) */
    /*  0x10070000 GIC4. (EB) */
    /*  0x10080000 SMC.  */
    /* 0x1e000000 GIC1. (PB) */
    /*  0x1e001000 GIC2. (PB) */
    /*  0x1e002000 GIC3. (PB) */
    /*  0x1e003000 GIC4. (PB) */
    /*  0x40000000 NOR flash.  */
    /*  0x44000000 DoC flash.  */
    /*  0x48000000 SRAM.  */
    /*  0x4c000000 Configuration flash.  */
    /* 0x4e000000 Ethernet.  */
    /*  0x4f000000 USB.  */
    /*  0x50000000 PISMO.  */
    /*  0x54000000 PISMO.  */
    /*  0x58000000 PISMO.  */
    /*  0x5c000000 PISMO.  */
    /* 0x60000000 PCI.  */
    /* 0x61000000 PCI Self Config.  */
    /* 0x62000000 PCI Config.  */
    /* 0x63000000 PCI IO.  */
    /* 0x64000000 PCI mem 0.  */
    /* 0x68000000 PCI mem 1.  */
    /* 0x6c000000 PCI mem 2.  */

    /* ??? Hack to map an additional page of ram for the secondary CPU
       startup code.  I guess this works on real hardware because the
       BootROM happens to be in ROM/flash or in memory that isn't clobbered
       until after Linux boots the secondary CPUs.  */
    ram_offset = qemu_ram_alloc(NULL, "realview.hack", 0x1000);
    cpu_register_physical_memory(SMP_BOOT_ADDR, 0x1000,
                                 ram_offset | IO_MEM_RAM);

    realview_binfo.ram_size = ram_size;
    realview_binfo.kernel_filename = kernel_filename;
    realview_binfo.kernel_cmdline = kernel_cmdline;
    realview_binfo.initrd_filename = initrd_filename;
    realview_binfo.nb_cpus = smp_cpus;
    realview_binfo.board_id = realview_board_id[board_type];
    realview_binfo.loader_start = (board_type == BOARD_PB_A8 ? 0x70000000 : 0);
    arm_load_kernel(first_cpu, &realview_binfo);
}

static void realview_eb_init(ram_addr_t ram_size,
                     const char *boot_device,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model)
{
    if (!cpu_model) {
        cpu_model = "arm926";
    }
    realview_init(ram_size, boot_device, kernel_filename, kernel_cmdline,
                  initrd_filename, cpu_model, BOARD_EB);
}

static void realview_eb_mpcore_init(ram_addr_t ram_size,
                     const char *boot_device,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model)
{
    if (!cpu_model) {
        cpu_model = "arm11mpcore";
    }
    realview_init(ram_size, boot_device, kernel_filename, kernel_cmdline,
                  initrd_filename, cpu_model, BOARD_EB_MPCORE);
}

static void realview_pb_a8_init(ram_addr_t ram_size,
                     const char *boot_device,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model)
{
    if (!cpu_model) {
        cpu_model = "cortex-a8";
    }
    realview_init(ram_size, boot_device, kernel_filename, kernel_cmdline,
                  initrd_filename, cpu_model, BOARD_PB_A8);
}

static void realview_pbx_a9_init(ram_addr_t ram_size,
                     const char *boot_device,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model)
{
    if (!cpu_model) {
        cpu_model = "cortex-a9";
    }
    realview_init(ram_size, boot_device, kernel_filename, kernel_cmdline,
                  initrd_filename, cpu_model, BOARD_PBX_A9);
}

static QEMUMachine realview_eb_machine = {
    .name = "realview-eb",
    .desc = "ARM RealView Emulation Baseboard (ARM926EJ-S)",
    .init = realview_eb_init,
    .use_scsi = 1,
};

static QEMUMachine realview_eb_mpcore_machine = {
    .name = "realview-eb-mpcore",
    .desc = "ARM RealView Emulation Baseboard (ARM11MPCore)",
    .init = realview_eb_mpcore_init,
    .use_scsi = 1,
    .max_cpus = 4,
};

static QEMUMachine realview_pb_a8_machine = {
    .name = "realview-pb-a8",
    .desc = "ARM RealView Platform Baseboard for Cortex-A8",
    .init = realview_pb_a8_init,
};

static QEMUMachine realview_pbx_a9_machine = {
    .name = "realview-pbx-a9",
    .desc = "ARM RealView Platform Baseboard Explore for Cortex-A9",
    .init = realview_pbx_a9_init,
    .use_scsi = 1,
    .max_cpus = 4,
};

static void realview_machine_init(void)
{
    qemu_register_machine(&realview_eb_machine);
    qemu_register_machine(&realview_eb_mpcore_machine);
    qemu_register_machine(&realview_pb_a8_machine);
    qemu_register_machine(&realview_pbx_a9_machine);
}

machine_init(realview_machine_init);
device_init(realview_register_devices)