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/gpio.h>
  10 #include <linux/of_gpio.h>
  11 #include <linux/phy/phy.h>
  12 #include "common.h"
  13 #include "rcar2.h"
  14
  15 static 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         return -ENXIO;
  30 }
  31
  32 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
  33 {
  34         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  35
  36         if (priv->phy) {
  37                 phy_put(priv->phy);
  38                 priv->phy = NULL;
  39         }
  40
  41         return 0;
  42 }
  43
  44 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
  45                                 void __iomem *base, int enable)
  46 {
  47         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  48         int retval = -ENODEV;
  49
  50         if (priv->phy) {
  51                 if (enable) {
  52                         retval = phy_init(priv->phy);
  53
  54                         if (!retval)
  55                                 retval = phy_power_on(priv->phy);
  56                 } else {
  57                         phy_power_off(priv->phy);
  58                         phy_exit(priv->phy);
  59                         retval = 0;
  60                 }
  61         }
  62
  63         return retval;
  64 }
  65
  66 const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
  67         .platform_callback = {
  68                 .hardware_init = usbhs_rcar2_hardware_init,
  69                 .hardware_exit = usbhs_rcar2_hardware_exit,
  70                 .power_ctrl = usbhs_rcar2_power_ctrl,
  71                 .get_id = usbhs_get_id_as_gadget,
  72         },
  73         .driver_param = {
  74                 .has_usb_dmac = 1,
  75                 .has_new_pipe_configs = 1,
  76         },
  77 };