// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * This file configures the internal USB PHY in OMAP4430. Used
 * with TWL6030 transceiver and MUSB on OMAP4430.
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com
 * Author: Hema HK <hemahk@ti.com>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/types.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/usb.h>
#include <linux/usb/musb.h>

#include "soc.h"
#include "control.h"

#define CONTROL_DEV_CONF                0x300
#define PHY_PD                          0x1

/**
 * omap4430_phy_power_down: disable MUSB PHY during early init
 *
 * OMAP4 MUSB PHY module is enabled by default on reset, but this will
 * prevent core retention if not disabled by SW. USB driver will
 * later on enable this, once and if the driver needs it.
 */
static int __init omap4430_phy_power_down(void)
{
        void __iomem *ctrl_base;

        if (!cpu_is_omap44xx())
                return 0;

        ctrl_base = ioremap(OMAP443X_SCM_BASE, SZ_1K);
        if (!ctrl_base) {
                pr_err("control module ioremap failed\n");
                return -ENOMEM;
        }

        /* Power down the phy */
        writel_relaxed(PHY_PD, ctrl_base + CONTROL_DEV_CONF);

        iounmap(ctrl_base);

        return 0;
}
omap_early_initcall(omap4430_phy_power_down);