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// 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);
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