mpc834x_mds.c

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/*
 * arch/powerpc/platforms/83xx/mpc834x_mds.c
 *
 * MPC834x MDS board specific routines
 *
 * Maintainer: Kumar Gala <[email protected]>
 *
 * 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.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/of_platform.h>

#include <linux/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ipic.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#include "mpc83xx.h"

#define BCSR5_INT_USB       0x02
static int mpc834xemds_usb_cfg(void)
{
    struct device_node *np;
    void __iomem *bcsr_regs = NULL;
    u8 bcsr5;

    mpc834x_usb_cfg();
    /* Map BCSR area */
    np = of_find_node_by_name(NULL, "bcsr");
    if (np) {
        struct resource res;

        of_address_to_resource(np, 0, &res);
        bcsr_regs = ioremap(res.start, resource_size(&res));
        of_node_put(np);
    }
    if (!bcsr_regs)
        return -1;

    /*
     * if Processor Board is plugged into PIB board,
     * force to use the PHY on Processor Board
     */
    bcsr5 = in_8(bcsr_regs + 5);
    if (!(bcsr5 & BCSR5_INT_USB))
        out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
    iounmap(bcsr_regs);
    return 0;
}

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc834x_mds_setup_arch(void)
{
    if (ppc_md.progress)
        ppc_md.progress("mpc834x_mds_setup_arch()", 0);

    mpc83xx_setup_pci();

    mpc834xemds_usb_cfg();
}

machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init mpc834x_mds_probe(void)
{
    unsigned long root = of_get_flat_dt_root();

    return of_flat_dt_is_compatible(root, "MPC834xMDS");
}

define_machine(mpc834x_mds) {
    .name           = "MPC834x MDS",
    .probe          = mpc834x_mds_probe,
    .setup_arch     = mpc834x_mds_setup_arch,
    .init_IRQ       = mpc83xx_ipic_init_IRQ,
    .get_irq        = ipic_get_irq,
    .restart        = mpc83xx_restart,
    .time_init      = mpc83xx_time_init,
    .calibrate_decr     = generic_calibrate_decr,
    .progress       = udbg_progress,
};