drivers/usb/renesas_usbhs/rcar2.c

   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
  13 static 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
  30 static 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
  42 static 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
  64 const 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 };