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  */
   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
  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         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
  42 static 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
  59 static 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
  94 static int usbhs_rcar2_get_id(struct platform_device *pdev)
  95 {
  96         return USBHS_GADGET;
  97 }
  98
  99 const 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 };