1// SPDX-License-Identifier: GPL-1.0+
  2/*
  3 * Renesas USB driver R-Car Gen. 2 initialization and power control
  4 *
  5 * Copyright (C) 2014 Ulrich Hecht
  6 */
  7
  8#include <linux/gpio.h>
  9#include <linux/of_gpio.h>
 10#include <linux/phy/phy.h>
 11#include <linux/usb/phy.h>
 12#include "common.h"
 13#include "rcar2.h"
 14
 15static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
 16{
 17	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 18
 19	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
 20		struct phy *phy = phy_get(&pdev->dev, "usb");
 21
 22		if (IS_ERR(phy))
 23			return PTR_ERR(phy);
 24
 25		priv->phy = phy;
 26		return 0;
 27	}
 28
 29	if (IS_ENABLED(CONFIG_USB_PHY)) {
 30		struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
 31
 32		if (IS_ERR(usb_phy))
 33			return PTR_ERR(usb_phy);
 34
 35		priv->usb_phy = usb_phy;
 36		return 0;
 37	}
 38
 39	return -ENXIO;
 40}
 41
 42static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
 43{
 44	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 45
 46	if (priv->phy) {
 47		phy_put(priv->phy);
 48		priv->phy = NULL;
 49	}
 50
 51	if (priv->usb_phy) {
 52		usb_put_phy(priv->usb_phy);
 53		priv->usb_phy = NULL;
 54	}
 55
 56	return 0;
 57}
 58
 59static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
 60				void __iomem *base, int enable)
 61{
 62	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 63	int retval = -ENODEV;
 64
 65	if (priv->phy) {
 66		if (enable) {
 67			retval = phy_init(priv->phy);
 68
 69			if (!retval)
 70				retval = phy_power_on(priv->phy);
 71		} else {
 72			phy_power_off(priv->phy);
 73			phy_exit(priv->phy);
 74			retval = 0;
 75		}
 76	}
 77
 78	if (priv->usb_phy) {
 79		if (enable) {
 80			retval = usb_phy_init(priv->usb_phy);
 81
 82			if (!retval)
 83				retval = usb_phy_set_suspend(priv->usb_phy, 0);
 84		} else {
 85			usb_phy_set_suspend(priv->usb_phy, 1);
 86			usb_phy_shutdown(priv->usb_phy);
 87			retval = 0;
 88		}
 89	}
 90
 91	return retval;
 92}
 93
 94static int usbhs_rcar2_get_id(struct platform_device *pdev)
 95{
 96	return USBHS_GADGET;
 97}
 98
 99const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
100	.hardware_init = usbhs_rcar2_hardware_init,
101	.hardware_exit = usbhs_rcar2_hardware_exit,
102	.power_ctrl = usbhs_rcar2_power_ctrl,
103	.get_id = usbhs_rcar2_get_id,
104};