/*
 * Board setup routines for the storcenter
 *
 * Copyright 2007 (C) Oyvind Repvik (nail@nslu2-linux.org)
 * Copyright 2007 Andy Wilcox, Jon Loeliger
 *
 * Based on linkstation.c by G. Liakhovetski
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of
 * any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/initrd.h>
#include <linux/of_platform.h>

#include <asm/time.h>
#include <asm/mpic.h>
#include <asm/pci-bridge.h>

#include "mpc10x.h"


static const struct of_device_id storcenter_of_bus[] __initconst = {
        { .name = "soc", },
        {},
};

static int __init storcenter_device_probe(void)
{
        of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
        return 0;
}
machine_device_initcall(storcenter, storcenter_device_probe);


static int __init storcenter_add_bridge(struct device_node *dev)
{
#ifdef CONFIG_PCI
        int len;
        struct pci_controller *hose;
        const int *bus_range;

        printk("Adding PCI host bridge %pOF\n", dev);

        hose = pcibios_alloc_controller(dev);
        if (hose == NULL)
                return -ENOMEM;

        bus_range = of_get_property(dev, "bus-range", &len);
        hose->first_busno = bus_range ? bus_range[0] : 0;
        hose->last_busno = bus_range ? bus_range[1] : 0xff;

        setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);

        /* Interpret the "ranges" property */
        /* This also maps the I/O region and sets isa_io/mem_base */
        pci_process_bridge_OF_ranges(hose, dev, 1);
#endif

        return 0;
}

static void __init storcenter_setup_arch(void)
{
        printk(KERN_INFO "IOMEGA StorCenter\n");
}

static void __init storcenter_setup_pci(void)
{
        struct device_node *np;

        /* Lookup PCI host bridges */
        for_each_compatible_node(np, "pci", "mpc10x-pci")
                storcenter_add_bridge(np);
}

/*
 * Interrupt setup and service.  Interrupts on the turbostation come
 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 */
static void __init storcenter_init_IRQ(void)
{
        struct mpic *mpic;

        mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
        BUG_ON(mpic == NULL);

        /*
         * 16 Serial Interrupts followed by 16 Internal Interrupts.
         * I2C is the second internal, so it is at 17, 0x11020.
         */
        mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
        mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);

        mpic_init(mpic);
}

static void __noreturn storcenter_restart(char *cmd)
{
        local_irq_disable();

        /* Set exception prefix high - to the firmware */
        mtmsr(mfmsr() | MSR_IP);
        isync();

        /* Wait for reset to happen */
        for (;;) ;
}

define_machine(storcenter){
        .name                   = "IOMEGA StorCenter",
        .compatible             = "iomega,storcenter",
        .setup_arch             = storcenter_setup_arch,
        .discover_phbs          = storcenter_setup_pci,
        .init_IRQ               = storcenter_init_IRQ,
        .get_irq                = mpic_get_irq,
        .restart                = storcenter_restart,
};