drivers/usb/renesas_usbhs/rcar2.c

   1 /*
   2  * Renesas USB driver R-Car Gen. 2 initialization and power control
   3  *
   4  * Copyright (C) 2014 Ulrich Hecht
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  */
  12
  13 #include <linux/gpio.h>
  14 #include <linux/of_gpio.h>
  15 #include <linux/platform_data/gpio-rcar.h>
  16 #include <linux/usb/phy.h>
  17 #include "common.h"
  18 #include "rcar2.h"
  19
  20 static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
  21 {
  22         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  23         struct usb_phy *phy;
  24
  25         phy = usb_get_phy_dev(&pdev->dev, 0);
  26         if (IS_ERR(phy))
  27                 return PTR_ERR(phy);
  28
  29         priv->phy = phy;
  30         return 0;
  31 }
  32
  33 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
  34 {
  35         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  36
  37         if (!priv->phy)
  38                 return 0;
  39
  40         usb_put_phy(priv->phy);
  41         priv->phy = NULL;
  42
  43         return 0;
  44 }
  45
  46 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
  47                                 void __iomem *base, int enable)
  48 {
  49         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
  50
  51         if (!priv->phy)
  52                 return -ENODEV;
  53
  54         if (enable) {
  55                 int retval = usb_phy_init(priv->phy);
  56
  57                 if (!retval)
  58                         retval = usb_phy_set_suspend(priv->phy, 0);
  59                 return retval;
  60         }
  61
  62         usb_phy_set_suspend(priv->phy, 1);
  63         usb_phy_shutdown(priv->phy);
  64         return 0;
  65 }
  66
  67 static int usbhs_rcar2_get_id(struct platform_device *pdev)
  68 {
  69         return USBHS_GADGET;
  70 }
  71
  72 const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
  73         .hardware_init = usbhs_rcar2_hardware_init,
  74         .hardware_exit = usbhs_rcar2_hardware_exit,
  75         .power_ctrl = usbhs_rcar2_power_ctrl,
  76         .get_id = usbhs_rcar2_get_id,
  77 };