usb: renesas_usbhs: add R-Car Gen. 2 init and power control

In preparation for DT conversion to reduce reliance on platform device
callbacks.

Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/renesas_usbhs/rcar2.c

@@ -0,0 +1,77 @@
+/*
+ * Renesas USB driver R-Car Gen. 2 initialization and power control
+ *
+ * Copyright (C) 2014 Ulrich Hecht
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_data/gpio-rcar.h>
+#include <linux/usb/phy.h>
+#include "common.h"
+#include "rcar2.h"
+
+static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+	struct usb_phy *phy;
+
+	phy = usb_get_phy_dev(&pdev->dev, 0);
+	if (IS_ERR(phy))
+		return PTR_ERR(phy);
+
+	priv->phy = phy;
+	return 0;
+}
+
+static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+
+	if (!priv->phy)
+		return 0;
+
+	usb_put_phy(priv->phy);
+	priv->phy = NULL;
+
+	return 0;
+}
+
+static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
+				void __iomem *base, int enable)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+
+	if (!priv->phy)
+		return -ENODEV;
+
+	if (enable) {
+		int retval = usb_phy_init(priv->phy);
+
+		if (!retval)
+			retval = usb_phy_set_suspend(priv->phy, 0);
+		return retval;
+	}
+
+	usb_phy_set_suspend(priv->phy, 1);
+	usb_phy_shutdown(priv->phy);
+	return 0;
+}
+
+static int usbhs_rcar2_get_id(struct platform_device *pdev)
+{
+	return USBHS_GADGET;
+}
+
+const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
+	.hardware_init = usbhs_rcar2_hardware_init,
+	.hardware_exit = usbhs_rcar2_hardware_exit,
+	.power_ctrl = usbhs_rcar2_power_ctrl,
+	.get_id = usbhs_rcar2_get_id,
+};