Initial import

1 files changed, 777 insertions, 0 deletions

diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
new file mode 100644
index 000000000..0f7e850fd
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -0,0 +1,777 @@
+/*
+ * Renesas USB driver
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include "common.h"
+#include "rcar2.h"
+
+/*
+ *		image of renesas_usbhs
+ *
+ * ex) gadget case
+
+ * mod.c
+ * mod_gadget.c
+ * mod_host.c		pipe.c		fifo.c
+ *
+ *			+-------+	+-----------+
+ *			| pipe0 |------>| fifo pio  |
+ * +------------+	+-------+	+-----------+
+ * | mod_gadget |=====> | pipe1 |--+
+ * +------------+	+-------+  |	+-----------+
+ *			| pipe2 |  |  +-| fifo dma0 |
+ * +------------+	+-------+  |  |	+-----------+
+ * | mod_host   |	| pipe3 |<-|--+
+ * +------------+	+-------+  |	+-----------+
+ *			| ....  |  +--->| fifo dma1 |
+ *			| ....  |	+-----------+
+ */
+
+
+#define USBHSF_RUNTIME_PWCTRL	(1 << 0)
+
+/* status */
+#define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
+#define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
+#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
+#define usbhsc_flags_has(p, b) ((p)->flags &   (b))
+
+/*
+ * platform call back
+ *
+ * renesas usb support platform callback function.
+ * Below macro call it.
+ * if platform doesn't have callback, it return 0 (no error)
+ */
+#define usbhs_platform_call(priv, func, args...)\
+	(!(priv) ? -ENODEV :			\
+	 !((priv)->pfunc.func) ? 0 :		\
+	 (priv)->pfunc.func(args))
+
+/*
+ *		common functions
+ */
+u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
+{
+	return ioread16(priv->base + reg);
+}
+
+void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
+{
+	iowrite16(data, priv->base + reg);
+}
+
+void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
+{
+	u16 val = usbhs_read(priv, reg);
+
+	val &= ~mask;
+	val |= data & mask;
+
+	usbhs_write(priv, reg, val);
+}
+
+struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
+{
+	return dev_get_drvdata(&pdev->dev);
+}
+
+/*
+ *		syscfg functions
+ */
+static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
+{
+	usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
+}
+
+void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
+{
+	u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
+	u16 val  = DCFM | DRPD | HSE | USBE;
+	int has_otg = usbhs_get_dparam(priv, has_otg);
+
+	if (has_otg)
+		usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
+
+	/*
+	 * if enable
+	 *
+	 * - select Host mode
+	 * - D+ Line/D- Line Pull-down
+	 */
+	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
+}
+
+void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
+{
+	u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
+	u16 val  = HSE | USBE;
+
+	/*
+	 * if enable
+	 *
+	 * - select Function mode
+	 * - D+ Line Pull-up is disabled
+	 *      When D+ Line Pull-up is enabled,
+	 *      calling usbhs_sys_function_pullup(,1)
+	 */
+	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
+}
+
+void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
+{
+	usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
+}
+
+void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
+{
+	usbhs_write(priv, TESTMODE, mode);
+}
+
+/*
+ *		frame functions
+ */
+int usbhs_frame_get_num(struct usbhs_priv *priv)
+{
+	return usbhs_read(priv, FRMNUM) & FRNM_MASK;
+}
+
+/*
+ *		usb request functions
+ */
+void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
+{
+	u16 val;
+
+	val = usbhs_read(priv, USBREQ);
+	req->bRequest		= (val >> 8) & 0xFF;
+	req->bRequestType	= (val >> 0) & 0xFF;
+
+	req->wValue	= usbhs_read(priv, USBVAL);
+	req->wIndex	= usbhs_read(priv, USBINDX);
+	req->wLength	= usbhs_read(priv, USBLENG);
+}
+
+void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
+{
+	usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
+	usbhs_write(priv, USBVAL,  req->wValue);
+	usbhs_write(priv, USBINDX, req->wIndex);
+	usbhs_write(priv, USBLENG, req->wLength);
+
+	usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
+}
+
+/*
+ *		bus/vbus functions
+ */
+void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
+{
+	u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
+
+	if (status != USBRST) {
+		struct device *dev = usbhs_priv_to_dev(priv);
+		dev_err(dev, "usbhs should be reset\n");
+	}
+
+	usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
+}
+
+void usbhs_bus_send_reset(struct usbhs_priv *priv)
+{
+	usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
+}
+
+int usbhs_bus_get_speed(struct usbhs_priv *priv)
+{
+	u16 dvstctr = usbhs_read(priv, DVSTCTR);
+
+	switch (RHST & dvstctr) {
+	case RHST_LOW_SPEED:
+		return USB_SPEED_LOW;
+	case RHST_FULL_SPEED:
+		return USB_SPEED_FULL;
+	case RHST_HIGH_SPEED:
+		return USB_SPEED_HIGH;
+	}
+
+	return USB_SPEED_UNKNOWN;
+}
+
+int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
+{
+	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+
+	return usbhs_platform_call(priv, set_vbus, pdev, enable);
+}
+
+static void usbhsc_bus_init(struct usbhs_priv *priv)
+{
+	usbhs_write(priv, DVSTCTR, 0);
+
+	usbhs_vbus_ctrl(priv, 0);
+}
+
+/*
+ *		device configuration
+ */
+int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
+			   u16 upphub, u16 hubport, u16 speed)
+{
+	struct device *dev = usbhs_priv_to_dev(priv);
+	u16 usbspd = 0;
+	u32 reg = DEVADD0 + (2 * devnum);
+
+	if (devnum > 10) {
+		dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
+		return -EIO;
+	}
+
+	if (upphub > 0xA) {
+		dev_err(dev, "unsupported hub number %d\n", upphub);
+		return -EIO;
+	}
+
+	switch (speed) {
+	case USB_SPEED_LOW:
+		usbspd = USBSPD_SPEED_LOW;
+		break;
+	case USB_SPEED_FULL:
+		usbspd = USBSPD_SPEED_FULL;
+		break;
+	case USB_SPEED_HIGH:
+		usbspd = USBSPD_SPEED_HIGH;
+		break;
+	default:
+		dev_err(dev, "unsupported speed %d\n", speed);
+		return -EIO;
+	}
+
+	usbhs_write(priv, reg,	UPPHUB(upphub)	|
+				HUBPORT(hubport)|
+				USBSPD(usbspd));
+
+	return 0;
+}
+
+/*
+ *		interrupt functions
+ */
+void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
+{
+	u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
+
+	usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
+}
+
+/*
+ *		local functions
+ */
+static void usbhsc_set_buswait(struct usbhs_priv *priv)
+{
+	int wait = usbhs_get_dparam(priv, buswait_bwait);
+
+	/* set bus wait if platform have */
+	if (wait)
+		usbhs_bset(priv, BUSWAIT, 0x000F, wait);
+}
+
+/*
+ *		platform default param
+ */
+
+/* commonly used on old SH-Mobile SoCs */
+static u32 usbhsc_default_pipe_type[] = {
+		USB_ENDPOINT_XFER_CONTROL,
+		USB_ENDPOINT_XFER_ISOC,
+		USB_ENDPOINT_XFER_ISOC,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+};
+
+/* commonly used on newer SH-Mobile and R-Car SoCs */
+static u32 usbhsc_new_pipe_type[] = {
+		USB_ENDPOINT_XFER_CONTROL,
+		USB_ENDPOINT_XFER_ISOC,
+		USB_ENDPOINT_XFER_ISOC,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+};
+
+/*
+ *		power control
+ */
+static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
+{
+	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+	struct device *dev = usbhs_priv_to_dev(priv);
+
+	if (enable) {
+		/* enable PM */
+		pm_runtime_get_sync(dev);
+
+		/* enable platform power */
+		usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
+
+		/* USB on */
+		usbhs_sys_clock_ctrl(priv, enable);
+	} else {
+		/* USB off */
+		usbhs_sys_clock_ctrl(priv, enable);
+
+		/* disable platform power */
+		usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
+
+		/* disable PM */
+		pm_runtime_put_sync(dev);
+	}
+}
+
+/*
+ *		hotplug
+ */
+static void usbhsc_hotplug(struct usbhs_priv *priv)
+{
+	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+	int id;
+	int enable;
+	int cable;
+	int ret;
+
+	/*
+	 * get vbus status from platform
+	 */
+	enable = usbhs_platform_call(priv, get_vbus, pdev);
+
+	/*
+	 * get id from platform
+	 */
+	id = usbhs_platform_call(priv, get_id, pdev);
+
+	if (enable && !mod) {
+		if (priv->edev) {
+			cable = extcon_get_cable_state(priv->edev, "USB-HOST");
+			if ((cable > 0 && id != USBHS_HOST) ||
+			    (!cable && id != USBHS_GADGET)) {
+				dev_info(&pdev->dev,
+					 "USB cable plugged in doesn't match the selected role!\n");
+				return;
+			}
+		}
+
+		ret = usbhs_mod_change(priv, id);
+		if (ret < 0)
+			return;
+
+		dev_dbg(&pdev->dev, "%s enable\n", __func__);
+
+		/* power on */
+		if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+			usbhsc_power_ctrl(priv, enable);
+
+		/* bus init */
+		usbhsc_set_buswait(priv);
+		usbhsc_bus_init(priv);
+
+		/* module start */
+		usbhs_mod_call(priv, start, priv);
+
+	} else if (!enable && mod) {
+		dev_dbg(&pdev->dev, "%s disable\n", __func__);
+
+		/* module stop */
+		usbhs_mod_call(priv, stop, priv);
+
+		/* bus init */
+		usbhsc_bus_init(priv);
+
+		/* power off */
+		if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+			usbhsc_power_ctrl(priv, enable);
+
+		usbhs_mod_change(priv, -1);
+
+		/* reset phy for next connection */
+		usbhs_platform_call(priv, phy_reset, pdev);
+	}
+}
+
+/*
+ *		notify hotplug
+ */
+static void usbhsc_notify_hotplug(struct work_struct *work)
+{
+	struct usbhs_priv *priv = container_of(work,
+					       struct usbhs_priv,
+					       notify_hotplug_work.work);
+	usbhsc_hotplug(priv);
+}
+
+static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+	int delay = usbhs_get_dparam(priv, detection_delay);
+
+	/*
+	 * This functions will be called in interrupt.
+	 * To make sure safety context,
+	 * use workqueue for usbhs_notify_hotplug
+	 */
+	schedule_delayed_work(&priv->notify_hotplug_work,
+			      msecs_to_jiffies(delay));
+	return 0;
+}
+
+/*
+ *		platform functions
+ */
+static const struct of_device_id usbhs_of_match[] = {
+	{
+		.compatible = "renesas,usbhs-r8a7790",
+		.data = (void *)USBHS_TYPE_R8A7790,
+	},
+	{
+		.compatible = "renesas,usbhs-r8a7791",
+		.data = (void *)USBHS_TYPE_R8A7791,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, usbhs_of_match);
+
+static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
+{
+	struct renesas_usbhs_platform_info *info;
+	struct renesas_usbhs_driver_param *dparam;
+	const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
+	u32 tmp;
+	int gpio;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return NULL;
+
+	dparam = &info->driver_param;
+	dparam->type = of_id ? (u32)of_id->data : 0;
+	if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
+		dparam->buswait_bwait = tmp;
+	gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
+				       NULL);
+	if (gpio > 0)
+		dparam->enable_gpio = gpio;
+
+	switch (dparam->type) {
+	case USBHS_TYPE_R8A7790:
+	case USBHS_TYPE_R8A7791:
+		dparam->has_usb_dmac = 1;
+		break;
+	default:
+		break;
+	}
+
+	return info;
+}
+
+static int usbhs_probe(struct platform_device *pdev)
+{
+	struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
+	struct renesas_usbhs_driver_callback *dfunc;
+	struct usbhs_priv *priv;
+	struct resource *res, *irq_res;
+	int ret;
+
+	/* check device node */
+	if (pdev->dev.of_node)
+		info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
+
+	/* check platform information */
+	if (!info) {
+		dev_err(&pdev->dev, "no platform information\n");
+		return -EINVAL;
+	}
+
+	/* platform data */
+	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!irq_res) {
+		dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
+		return -ENODEV;
+	}
+
+	/* usb private data */
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
+		priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
+		if (IS_ERR(priv->edev))
+			return PTR_ERR(priv->edev);
+	}
+
+	/*
+	 * care platform info
+	 */
+
+	memcpy(&priv->dparam,
+	       &info->driver_param,
+	       sizeof(struct renesas_usbhs_driver_param));
+
+	switch (priv->dparam.type) {
+	case USBHS_TYPE_R8A7790:
+	case USBHS_TYPE_R8A7791:
+		priv->pfunc = usbhs_rcar2_ops;
+		if (!priv->dparam.pipe_type) {
+			priv->dparam.pipe_type = usbhsc_new_pipe_type;
+			priv->dparam.pipe_size =
+				ARRAY_SIZE(usbhsc_new_pipe_type);
+		}
+		break;
+	default:
+		if (!info->platform_callback.get_id) {
+			dev_err(&pdev->dev, "no platform callbacks");
+			return -EINVAL;
+		}
+		memcpy(&priv->pfunc,
+		       &info->platform_callback,
+		       sizeof(struct renesas_usbhs_platform_callback));
+		break;
+	}
+
+	/* set driver callback functions for platform */
+	dfunc			= &info->driver_callback;
+	dfunc->notify_hotplug	= usbhsc_drvcllbck_notify_hotplug;
+
+	/* set default param if platform doesn't have */
+	if (!priv->dparam.pipe_type) {
+		priv->dparam.pipe_type = usbhsc_default_pipe_type;
+		priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
+	}
+	if (!priv->dparam.pio_dma_border)
+		priv->dparam.pio_dma_border = 64; /* 64byte */
+
+	/* FIXME */
+	/* runtime power control ? */
+	if (priv->pfunc.get_vbus)
+		usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
+
+	/*
+	 * priv settings
+	 */
+	priv->irq	= irq_res->start;
+	if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
+		priv->irqflags = IRQF_SHARED;
+	priv->pdev	= pdev;
+	INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
+	spin_lock_init(usbhs_priv_to_lock(priv));
+
+	/* call pipe and module init */
+	ret = usbhs_pipe_probe(priv);
+	if (ret < 0)
+		return ret;
+
+	ret = usbhs_fifo_probe(priv);
+	if (ret < 0)
+		goto probe_end_pipe_exit;
+
+	ret = usbhs_mod_probe(priv);
+	if (ret < 0)
+		goto probe_end_fifo_exit;
+
+	/* dev_set_drvdata should be called after usbhs_mod_init */
+	platform_set_drvdata(pdev, priv);
+
+	/*
+	 * deviece reset here because
+	 * USB device might be used in boot loader.
+	 */
+	usbhs_sys_clock_ctrl(priv, 0);
+
+	/* check GPIO determining if USB function should be enabled */
+	if (priv->dparam.enable_gpio) {
+		gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
+		ret = !gpio_get_value(priv->dparam.enable_gpio);
+		gpio_free(priv->dparam.enable_gpio);
+		if (ret) {
+			dev_warn(&pdev->dev,
+				 "USB function not selected (GPIO %d)\n",
+				 priv->dparam.enable_gpio);
+			ret = -ENOTSUPP;
+			goto probe_end_mod_exit;
+		}
+	}
+
+	/*
+	 * platform call
+	 *
+	 * USB phy setup might depend on CPU/Board.
+	 * If platform has its callback functions,
+	 * call it here.
+	 */
+	ret = usbhs_platform_call(priv, hardware_init, pdev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "platform init failed.\n");
+		goto probe_end_mod_exit;
+	}
+
+	/* reset phy for connection */
+	usbhs_platform_call(priv, phy_reset, pdev);
+
+	/* power control */
+	pm_runtime_enable(&pdev->dev);
+	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
+		usbhsc_power_ctrl(priv, 1);
+		usbhs_mod_autonomy_mode(priv);
+	}
+
+	/*
+	 * manual call notify_hotplug for cold plug
+	 */
+	usbhsc_drvcllbck_notify_hotplug(pdev);
+
+	dev_info(&pdev->dev, "probed\n");
+
+	return ret;
+
+probe_end_mod_exit:
+	usbhs_mod_remove(priv);
+probe_end_fifo_exit:
+	usbhs_fifo_remove(priv);
+probe_end_pipe_exit:
+	usbhs_pipe_remove(priv);
+
+	dev_info(&pdev->dev, "probe failed\n");
+
+	return ret;
+}
+
+static int usbhs_remove(struct platform_device *pdev)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+	struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
+	struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
+
+	dev_dbg(&pdev->dev, "usb remove\n");
+
+	dfunc->notify_hotplug = NULL;
+
+	/* power off */
+	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+		usbhsc_power_ctrl(priv, 0);
+
+	pm_runtime_disable(&pdev->dev);
+
+	usbhs_platform_call(priv, hardware_exit, pdev);
+	usbhs_mod_remove(priv);
+	usbhs_fifo_remove(priv);
+	usbhs_pipe_remove(priv);
+
+	return 0;
+}
+
+static int usbhsc_suspend(struct device *dev)
+{
+	struct usbhs_priv *priv = dev_get_drvdata(dev);
+	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+
+	if (mod) {
+		usbhs_mod_call(priv, stop, priv);
+		usbhs_mod_change(priv, -1);
+	}
+
+	if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+		usbhsc_power_ctrl(priv, 0);
+
+	return 0;
+}
+
+static int usbhsc_resume(struct device *dev)
+{
+	struct usbhs_priv *priv = dev_get_drvdata(dev);
+	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+
+	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+		usbhsc_power_ctrl(priv, 1);
+
+	usbhs_platform_call(priv, phy_reset, pdev);
+
+	usbhsc_drvcllbck_notify_hotplug(pdev);
+
+	return 0;
+}
+
+static int usbhsc_runtime_nop(struct device *dev)
+{
+	/* Runtime PM callback shared between ->runtime_suspend()
+	 * and ->runtime_resume(). Simply returns success.
+	 *
+	 * This driver re-initializes all registers after
+	 * pm_runtime_get_sync() anyway so there is no need
+	 * to save and restore registers here.
+	 */
+	return 0;
+}
+
+static const struct dev_pm_ops usbhsc_pm_ops = {
+	.suspend		= usbhsc_suspend,
+	.resume			= usbhsc_resume,
+	.runtime_suspend	= usbhsc_runtime_nop,
+	.runtime_resume		= usbhsc_runtime_nop,
+};
+
+static struct platform_driver renesas_usbhs_driver = {
+	.driver		= {
+		.name	= "renesas_usbhs",
+		.pm	= &usbhsc_pm_ops,
+		.of_match_table = of_match_ptr(usbhs_of_match),
+	},
+	.probe		= usbhs_probe,
+	.remove		= usbhs_remove,
+};
+
+module_platform_driver(renesas_usbhs_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Renesas USB driver");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");