linux/drivers/usb/renesas_usbhs/rcar2.c
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   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 * Copyright (C) 2019 Renesas Electronics Corporation
   7 */
   8
   9#include <linux/phy/phy.h>
  10#include "common.h"
  11#include "rcar2.h"
  12
  13static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
  14{
  15        struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  16
  17        if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
  18                struct phy *phy = phy_get(&pdev->dev, "usb");
  19
  20                if (IS_ERR(phy))
  21                        return PTR_ERR(phy);
  22
  23                priv->phy = phy;
  24                return 0;
  25        }
  26
  27        return -ENXIO;
  28}
  29
  30static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
  31{
  32        struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  33
  34        if (priv->phy) {
  35                phy_put(&pdev->dev, priv->phy);
  36                priv->phy = NULL;
  37        }
  38
  39        return 0;
  40}
  41
  42static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
  43                                void __iomem *base, int enable)
  44{
  45        struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  46        int retval = -ENODEV;
  47
  48        if (priv->phy) {
  49                if (enable) {
  50                        retval = phy_init(priv->phy);
  51
  52                        if (!retval)
  53                                retval = phy_power_on(priv->phy);
  54                } else {
  55                        phy_power_off(priv->phy);
  56                        phy_exit(priv->phy);
  57                        retval = 0;
  58                }
  59        }
  60
  61        return retval;
  62}
  63
  64const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
  65        .platform_callback = {
  66                .hardware_init = usbhs_rcar2_hardware_init,
  67                .hardware_exit = usbhs_rcar2_hardware_exit,
  68                .power_ctrl = usbhs_rcar2_power_ctrl,
  69                .get_id = usbhs_get_id_as_gadget,
  70        },
  71        .driver_param = {
  72                .has_usb_dmac = 1,
  73                .has_new_pipe_configs = 1,
  74        },
  75};
  76