mpc837x_mds.c

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/*
 * arch/powerpc/platforms/83xx/mpc837x_mds.c
 *
 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
 *
 * MPC837x MDS board specific routines
 *
 * 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/pci.h>
#include <linux/of.h>
#include <linux/of_platform.h>

#include <asm/time.h>
#include <asm/ipic.h>
#include <asm/udbg.h>
#include <asm/prom.h>
#include <sysdev/fsl_pci.h>

#include "mpc83xx.h"

#define BCSR12_USB_SER_MASK 0x8a
#define BCSR12_USB_SER_PIN  0x80
#define BCSR12_USB_SER_DEVICE   0x02

static int mpc837xmds_usb_cfg(void)
{
    struct device_node *np;
    const void *phy_type, *mode;
    void __iomem *bcsr_regs = NULL;
    u8 bcsr12;
    int ret;

    ret = mpc837x_usb_cfg();
    if (ret)
        return ret;
    /* Map BCSR area */
    np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
    if (np) {
        bcsr_regs = of_iomap(np, 0);
        of_node_put(np);
    }
    if (!bcsr_regs)
        return -1;

    np = of_find_node_by_name(NULL, "usb");
    if (!np) {
        ret = -ENODEV;
        goto out;
    }
    phy_type = of_get_property(np, "phy_type", NULL);
    if (phy_type && !strcmp(phy_type, "ulpi")) {
        clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
    } else if (phy_type && !strcmp(phy_type, "serial")) {
        mode = of_get_property(np, "dr_mode", NULL);
        bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
        bcsr12 |= BCSR12_USB_SER_PIN;
        if (mode && !strcmp(mode, "peripheral"))
            bcsr12 |= BCSR12_USB_SER_DEVICE;
        out_8(bcsr_regs + 12, bcsr12);
    } else {
        printk(KERN_ERR "USB DR: unsupported PHY\n");
    }

    of_node_put(np);
out:
    iounmap(bcsr_regs);
    return ret;
}

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc837x_mds_setup_arch(void)
{
    if (ppc_md.progress)
        ppc_md.progress("mpc837x_mds_setup_arch()", 0);

    mpc83xx_setup_pci();
    mpc837xmds_usb_cfg();
}

machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init mpc837x_mds_probe(void)
{
        unsigned long root = of_get_flat_dt_root();

        return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
}

define_machine(mpc837x_mds) {
    .name           = "MPC837x MDS",
    .probe          = mpc837x_mds_probe,
    .setup_arch     = mpc837x_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,
};