// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Freescale 83xx USB SOC setup code
 *
 * Copyright (C) 2007 Freescale Semiconductor, Inc.
 * Author: Li Yang
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>

#include <sysdev/fsl_soc.h>

#include "mpc83xx.h"

int __init mpc837x_usb_cfg(void)
{
        void __iomem *immap;
        struct device_node *np = NULL;
        const void *prop;
        int ret = 0;

        np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
        if (!np || !of_device_is_available(np)) {
                of_node_put(np);
                return -ENODEV;
        }
        prop = of_get_property(np, "phy_type", NULL);

        if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
                pr_warn("837x USB PHY type not supported\n");
                of_node_put(np);
                return -EINVAL;
        }

        /* Map IMMR space for pin and clock settings */
        immap = ioremap(get_immrbase(), 0x1000);
        if (!immap) {
                of_node_put(np);
                return -ENOMEM;
        }

        /* Configure clock */
        clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
                        MPC837X_SCCR_USB_DRCM_11);

        /* Configure pin mux for ULPI/serial */
        clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
                        MPC837X_SICRL_USB_ULPI);

        iounmap(immap);
        of_node_put(np);
        return ret;
}