storcenter.c

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/*
 * Board setup routines for the storcenter
 *
 * Copyright 2007 (C) Oyvind Repvik ([email protected])
 * 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/prom.h>
#include <asm/mpic.h>
#include <asm/pci-bridge.h>

#include "mpc10x.h"


static __initdata struct of_device_id storcenter_of_bus[] = {
    { .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 %s\n", dev->full_name);

    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)
{
    struct device_node *np;

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

    printk(KERN_INFO "IOMEGA StorCenter\n");
}

/*
 * 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 storcenter_restart(char *cmd)
{
    local_irq_disable();

    /* Set exception prefix high - to the firmware */
    _nmask_and_or_msr(0, MSR_IP);

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

static int __init storcenter_probe(void)
{
    unsigned long root = of_get_flat_dt_root();

    return of_flat_dt_is_compatible(root, "iomega,storcenter");
}

define_machine(storcenter){
    .name           = "IOMEGA StorCenter",
    .probe          = storcenter_probe,
    .setup_arch         = storcenter_setup_arch,
    .init_IRQ       = storcenter_init_IRQ,
    .get_irq        = mpic_get_irq,
    .restart        = storcenter_restart,
    .calibrate_decr     = generic_calibrate_decr,
};