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// SPDX-License-Identifier: GPL-2.0
/*
* Renesas USB driver RZ/A2 initialization and power control
*
* Copyright (C) 2019 Chris Brandt
* Copyright (C) 2019 Renesas Electronics Corporation
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include "common.h"
#include "rza.h"
static int usbhs_rza2_hardware_init(struct platform_device *pdev)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
struct phy *phy = phy_get(&pdev->dev, "usb");
if (IS_ERR(phy))
return PTR_ERR(phy);
priv->phy = phy;
return 0;
}
static int usbhs_rza2_hardware_exit(struct platform_device *pdev)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
phy_put(priv->phy);
priv->phy = NULL;
return 0;
}
static int usbhs_rza2_power_ctrl(struct platform_device *pdev,
void __iomem *base, int enable)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
int retval = 0;
if (!priv->phy)
return -ENODEV;
if (enable) {
retval = phy_init(priv->phy);
usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM);
udelay(100); /* Wait for PLL to become stable */
if (!retval)
retval = phy_power_on(priv->phy);
} else {
usbhs_bset(priv, SUSPMODE, SUSPM, 0);
phy_power_off(priv->phy);
phy_exit(priv->phy);
}
return retval;
}
static int usbhs_rza2_get_id(struct platform_device *pdev)
{
return USBHS_GADGET;
}
const struct renesas_usbhs_platform_callback usbhs_rza2_ops = {
.hardware_init = usbhs_rza2_hardware_init,
.hardware_exit = usbhs_rza2_hardware_exit,
.power_ctrl = usbhs_rza2_power_ctrl,
.get_id = usbhs_rza2_get_id,
};
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