[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / renesas_usbhs / common.c

/*
 * 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/io.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include "common.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  = DPRPU | HSE | USBE;

	/*
	 * if enable
	 *
	 * - select Function mode
	 * - D+ Line Pull-up
	 */
	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;
}

/*
 *		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
 */
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,
};

/*
 *		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 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) {
		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 int usbhs_probe(struct platform_device *pdev)
{
	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
	struct renesas_usbhs_driver_callback *dfunc;
	struct usbhs_priv *priv;
	struct resource *res, *irq_res;
	int ret;

	/* check platform information */
	if (!info ||
	    !info->platform_callback.get_id) {
		dev_err(&pdev->dev, "no platform information\n");
		return -EINVAL;
	}

	/* platform data */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res || !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) {
		dev_err(&pdev->dev, "Could not allocate priv\n");
		return -ENOMEM;
	}

	priv->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(priv->base))
		return PTR_ERR(priv->base);

	/*
	 * care platform info
	 */
	memcpy(&priv->pfunc,
	       &info->platform_callback,
	       sizeof(struct renesas_usbhs_platform_callback));
	memcpy(&priv->dparam,
	       &info->driver_param,
	       sizeof(struct renesas_usbhs_driver_param));

	/* 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 */
	dev_set_drvdata(&pdev->dev, priv);

	/*
	 * deviece reset here because
	 * USB device might be used in boot loader.
	 */
	usbhs_sys_clock_ctrl(priv, 0);

	/*
	 * 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 prove 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
	 */
	ret = usbhsc_drvcllbck_notify_hotplug(pdev);
	if (ret < 0)
		goto probe_end_call_remove;

	dev_info(&pdev->dev, "probed\n");

	return ret;

probe_end_call_remove:
	usbhs_platform_call(priv, hardware_exit, pdev);
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 = pdev->dev.platform_data;
	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_mod_autonomy_mode(priv);
	}

	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,
	},
	.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>");
Commit	Line	Data
f1407d5c KM	1	/*
	2	* Renesas USB driver
	3	*
	4	* Copyright (C) 2011 Renesas Solutions Corp.
	5	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
	6	*
	7	* This program is distributed in the hope that it will be useful,
	8	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	9	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	10	* GNU General Public License for more details.
	11	*
	12	* You should have received a copy of the GNU General Public License
	13	* along with this program; if not, write to the Free Software
	14	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	15	*
	16	*/
148e1134	17	#include <linux/err.h>
f1407d5c KM	18	#include <linux/io.h>
	19	#include <linux/module.h>
	20	#include <linux/pm_runtime.h>
	21	#include <linux/slab.h>
	22	#include <linux/sysfs.h>
cc502bb7	23	#include "common.h"
f1407d5c	24
233f519d KM	25	/*
	26	* image of renesas_usbhs
	27	*
	28	* ex) gadget case
	29
	30	* mod.c
	31	* mod_gadget.c
	32	* mod_host.c pipe.c fifo.c
	33	*
	34	* +-------+ +-----------+
	35	* \| pipe0 \|------>\| fifo pio \|
	36	* +------------+ +-------+ +-----------+
	37	* \| mod_gadget \|=====> \| pipe1 \|--+
	38	* +------------+ +-------+ \| +-----------+
	39	* \| pipe2 \| \| +-\| fifo dma0 \|
	40	* +------------+ +-------+ \| \| +-----------+
	41	* \| mod_host \| \| pipe3 \|<-\|--+
	42	* +------------+ +-------+ \| +-----------+
	43	* \| .... \| +--->\| fifo dma1 \|
	44	* \| .... \| +-----------+
	45	*/
	46
	47
b002ff6e KM	48	#define USBHSF_RUNTIME_PWCTRL (1 << 0)
	49
	50	/* status */
	51	#define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
	52	#define usbhsc_flags_set(p, b) ((p)->flags \|= (b))
	53	#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
	54	#define usbhsc_flags_has(p, b) ((p)->flags & (b))
	55
f1407d5c KM	56	/*
	57	* platform call back
	58	*
	59	* renesas usb support platform callback function.
	60	* Below macro call it.
	61	* if platform doesn't have callback, it return 0 (no error)
	62	*/
	63	#define usbhs_platform_call(priv, func, args...)\
	64	(!(priv) ? -ENODEV : \
48298206 KM	65	!((priv)->pfunc.func) ? 0 : \
48298206 KM	66	(priv)->pfunc.func(args))
f1407d5c KM	67
	68	/*
	69	* common functions
	70	*/
	71	u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
	72	{
	73	return ioread16(priv->base + reg);
	74	}
	75
	76	void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
	77	{
	78	iowrite16(data, priv->base + reg);
	79	}
	80
	81	void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
	82	{
	83	u16 val = usbhs_read(priv, reg);
	84
	85	val &= ~mask;
	86	val \|= data & mask;
	87
	88	usbhs_write(priv, reg, val);
	89	}
	90
206dcc2c KM	91	struct usbhs_priv usbhs_pdev_to_priv(struct platform_device pdev)
	92	{
	93	return dev_get_drvdata(&pdev->dev);
	94	}
	95
f1407d5c KM	96	/*
	97	* syscfg functions
	98	*/
76190152	99	static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
f1407d5c KM	100	{
	101	usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
	102	}
	103
f1407d5c KM	104	void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
f1407d5c KM	105	{
3244a7b4 KM	106	u16 mask = DCFM \| DRPD \| DPRPU \| HSE \| USBE;
3244a7b4 KM	107	u16 val = DCFM \| DRPD \| HSE \| USBE;
f427eb64 KM	108	int has_otg = usbhs_get_dparam(priv, has_otg);
	109
	110	if (has_otg)
	111	usbhs_bset(priv, DVSTCTR, (EXTLP \| PWEN), (EXTLP \| PWEN));
f1407d5c KM	112
	113	/*
	114	* if enable
	115	*
	116	* - select Host mode
	117	* - D+ Line/D- Line Pull-down
	118	*/
	119	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
	120	}
	121
	122	void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
	123	{
3244a7b4 KM	124	u16 mask = DCFM \| DRPD \| DPRPU \| HSE \| USBE;
3244a7b4 KM	125	u16 val = DPRPU \| HSE \| USBE;
f1407d5c KM	126
	127	/*
	128	* if enable
	129	*
	130	* - select Function mode
	131	* - D+ Line Pull-up
	132	*/
	133	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
	134	}
	135
4cd2f599 KM	136	void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
	137	{
	138	usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
	139	}
	140
dfbb7f4f KM	141	void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
	142	{
	143	usbhs_write(priv, TESTMODE, mode);
	144	}
	145
f1407d5c KM	146	/*
	147	* frame functions
	148	*/
	149	int usbhs_frame_get_num(struct usbhs_priv *priv)
	150	{
	151	return usbhs_read(priv, FRMNUM) & FRNM_MASK;
	152	}
	153
ef8bedb9 KM	154	/*
	155	* usb request functions
	156	*/
	157	void usbhs_usbreq_get_val(struct usbhs_priv priv, struct usb_ctrlrequest req)
	158	{
	159	u16 val;
	160
	161	val = usbhs_read(priv, USBREQ);
	162	req->bRequest = (val >> 8) & 0xFF;
	163	req->bRequestType = (val >> 0) & 0xFF;
	164
	165	req->wValue = usbhs_read(priv, USBVAL);
	166	req->wIndex = usbhs_read(priv, USBINDX);
	167	req->wLength = usbhs_read(priv, USBLENG);
	168	}
	169
	170	void usbhs_usbreq_set_val(struct usbhs_priv priv, struct usb_ctrlrequest req)
	171	{
	172	usbhs_write(priv, USBREQ, (req->bRequest << 8) \| req->bRequestType);
	173	usbhs_write(priv, USBVAL, req->wValue);
	174	usbhs_write(priv, USBINDX, req->wIndex);
	175	usbhs_write(priv, USBLENG, req->wLength);
	176
	177	usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
	178	}
	179
258485d9 KM	180	/*
	181	* bus/vbus functions
	182	*/
	183	void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
	184	{
a9be4a45 KM	185	u16 status = usbhs_read(priv, DVSTCTR) & (USBRST \| UACT);
	186
	187	if (status != USBRST) {
	188	struct device *dev = usbhs_priv_to_dev(priv);
	189	dev_err(dev, "usbhs should be reset\n");
	190	}
	191
258485d9 KM	192	usbhs_bset(priv, DVSTCTR, (USBRST \| UACT), UACT);
	193	}
	194
	195	void usbhs_bus_send_reset(struct usbhs_priv *priv)
	196	{
	197	usbhs_bset(priv, DVSTCTR, (USBRST \| UACT), USBRST);
	198	}
	199
75587f52 KM	200	int usbhs_bus_get_speed(struct usbhs_priv *priv)
	201	{
	202	u16 dvstctr = usbhs_read(priv, DVSTCTR);
	203
	204	switch (RHST & dvstctr) {
	205	case RHST_LOW_SPEED:
	206	return USB_SPEED_LOW;
	207	case RHST_FULL_SPEED:
	208	return USB_SPEED_FULL;
	209	case RHST_HIGH_SPEED:
	210	return USB_SPEED_HIGH;
	211	}
	212
	213	return USB_SPEED_UNKNOWN;
	214	}
	215
258485d9 KM	216	int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
	217	{
	218	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	219
	220	return usbhs_platform_call(priv, set_vbus, pdev, enable);
	221	}
	222
	223	static void usbhsc_bus_init(struct usbhs_priv *priv)
	224	{
	225	usbhs_write(priv, DVSTCTR, 0);
	226
	227	usbhs_vbus_ctrl(priv, 0);
	228	}
	229
eb05191f KM	230	/*
	231	* device configuration
	232	*/
3dd49268	233	int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
eb05191f KM	234	u16 upphub, u16 hubport, u16 speed)
	235	{
	236	struct device *dev = usbhs_priv_to_dev(priv);
	237	u16 usbspd = 0;
	238	u32 reg = DEVADD0 + (2 * devnum);
	239
	240	if (devnum > 10) {
	241	dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
	242	return -EIO;
	243	}
	244
	245	if (upphub > 0xA) {
	246	dev_err(dev, "unsupported hub number %d\n", upphub);
	247	return -EIO;
	248	}
	249
	250	switch (speed) {
	251	case USB_SPEED_LOW:
	252	usbspd = USBSPD_SPEED_LOW;
	253	break;
	254	case USB_SPEED_FULL:
	255	usbspd = USBSPD_SPEED_FULL;
	256	break;
	257	case USB_SPEED_HIGH:
	258	usbspd = USBSPD_SPEED_HIGH;
	259	break;
	260	default:
	261	dev_err(dev, "unsupported speed %d\n", speed);
	262	return -EIO;
	263	}
	264
	265	usbhs_write(priv, reg, UPPHUB(upphub) \|
	266	HUBPORT(hubport)\|
	267	USBSPD(usbspd));
	268
	269	return 0;
	270	}
	271
f1407d5c KM	272	/*
	273	* local functions
	274	*/
11935de5	275	static void usbhsc_set_buswait(struct usbhs_priv *priv)
f1407d5c KM	276	{
f1407d5c KM	277	int wait = usbhs_get_dparam(priv, buswait_bwait);
f1407d5c	278
11935de5 KM	279	/* set bus wait if platform have */
	280	if (wait)
	281	usbhs_bset(priv, BUSWAIT, 0x000F, wait);
f1407d5c KM	282	}
	283
	284	/*
	285	* platform default param
	286	*/
	287	static u32 usbhsc_default_pipe_type[] = {
	288	USB_ENDPOINT_XFER_CONTROL,
	289	USB_ENDPOINT_XFER_ISOC,
	290	USB_ENDPOINT_XFER_ISOC,
	291	USB_ENDPOINT_XFER_BULK,
	292	USB_ENDPOINT_XFER_BULK,
	293	USB_ENDPOINT_XFER_BULK,
	294	USB_ENDPOINT_XFER_INT,
	295	USB_ENDPOINT_XFER_INT,
	296	USB_ENDPOINT_XFER_INT,
	297	USB_ENDPOINT_XFER_INT,
	298	};
	299
	300	/*
6e267da8 KM	301	* power control
	302	*/
	303	static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
	304	{
f1ee56a0	305	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
6e267da8 KM	306	struct device *dev = usbhs_priv_to_dev(priv);
	307
	308	if (enable) {
	309	/* enable PM */
	310	pm_runtime_get_sync(dev);
	311
f1ee56a0 KM	312	/* enable platform power */
	313	usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
	314
6e267da8 KM	315	/* USB on */
6e267da8 KM	316	usbhs_sys_clock_ctrl(priv, enable);
6e267da8 KM	317	} else {
6e267da8 KM	318	/* USB off */
6e267da8 KM	319	usbhs_sys_clock_ctrl(priv, enable);
6e267da8 KM	320
f1ee56a0 KM	321	/* disable platform power */
	322	usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
	323
6e267da8 KM	324	/* disable PM */
	325	pm_runtime_put_sync(dev);
	326	}
	327	}
	328
	329	/*
ca8a282a	330	* hotplug
f1407d5c	331	*/
ca8a282a	332	static void usbhsc_hotplug(struct usbhs_priv *priv)
f1407d5c	333	{
f1407d5c KM	334	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	335	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	336	int id;
	337	int enable;
	338	int ret;
	339
	340	/*
	341	* get vbus status from platform
	342	*/
	343	enable = usbhs_platform_call(priv, get_vbus, pdev);
	344
	345	/*
	346	* get id from platform
	347	*/
	348	id = usbhs_platform_call(priv, get_id, pdev);
	349
	350	if (enable && !mod) {
	351	ret = usbhs_mod_change(priv, id);
	352	if (ret < 0)
	353	return;
	354
	355	dev_dbg(&pdev->dev, "%s enable\n", __func__);
	356
6e267da8	357	/* power on */
b002ff6e KM	358	if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
b002ff6e KM	359	usbhsc_power_ctrl(priv, enable);
f1407d5c	360
258485d9 KM	361	/* bus init */
	362	usbhsc_set_buswait(priv);
	363	usbhsc_bus_init(priv);
	364
f1407d5c KM	365	/* module start */
	366	usbhs_mod_call(priv, start, priv);
	367
	368	} else if (!enable && mod) {
	369	dev_dbg(&pdev->dev, "%s disable\n", __func__);
	370
	371	/* module stop */
	372	usbhs_mod_call(priv, stop, priv);
	373
258485d9 KM	374	/* bus init */
	375	usbhsc_bus_init(priv);
	376
6e267da8	377	/* power off */
b002ff6e KM	378	if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
b002ff6e KM	379	usbhsc_power_ctrl(priv, enable);
f1407d5c KM	380
	381	usbhs_mod_change(priv, -1);
	382
	383	/* reset phy for next connection */
	384	usbhs_platform_call(priv, phy_reset, pdev);
	385	}
	386	}
	387
ca8a282a KM	388	/*
	389	* notify hotplug
	390	*/
	391	static void usbhsc_notify_hotplug(struct work_struct *work)
	392	{
	393	struct usbhs_priv *priv = container_of(work,
	394	struct usbhs_priv,
	395	notify_hotplug_work.work);
	396	usbhsc_hotplug(priv);
	397	}
	398
b4fcea2a	399	static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
f1407d5c	400	{
206dcc2c	401	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
bc57381e	402	int delay = usbhs_get_dparam(priv, detection_delay);
f1407d5c KM	403
	404	/*
	405	* This functions will be called in interrupt.
	406	* To make sure safety context,
	407	* use workqueue for usbhs_notify_hotplug
	408	*/
a49a88f1 KM	409	schedule_delayed_work(&priv->notify_hotplug_work,
a49a88f1 KM	410	msecs_to_jiffies(delay));
f1407d5c KM	411	return 0;
	412	}
	413
	414	/*
	415	* platform functions
	416	*/
b7a8d17d	417	static int usbhs_probe(struct platform_device *pdev)
f1407d5c KM	418	{
	419	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
	420	struct renesas_usbhs_driver_callback *dfunc;
	421	struct usbhs_priv *priv;
53069af3	422	struct resource res, irq_res;
f1407d5c KM	423	int ret;
	424
	425	/* check platform information */
	426	if (!info \|\|
b002ff6e	427	!info->platform_callback.get_id) {
f1407d5c KM	428	dev_err(&pdev->dev, "no platform information\n");
	429	return -EINVAL;
	430	}
	431
	432	/* platform data */
	433	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
53069af3 SY	434	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
53069af3 SY	435	if (!res \|\| !irq_res) {
f1407d5c KM	436	dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
	437	return -ENODEV;
	438	}
	439
	440	/* usb private data */
58efc77c	441	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
f1407d5c KM	442	if (!priv) {
	443	dev_err(&pdev->dev, "Could not allocate priv\n");
	444	return -ENOMEM;
	445	}
	446
148e1134 TR	447	priv->base = devm_ioremap_resource(&pdev->dev, res);
	448	if (IS_ERR(priv->base))
	449	return PTR_ERR(priv->base);
f1407d5c KM	450
	451	/*
	452	* care platform info
	453	*/
48298206 KM	454	memcpy(&priv->pfunc,
	455	&info->platform_callback,
	456	sizeof(struct renesas_usbhs_platform_callback));
	457	memcpy(&priv->dparam,
	458	&info->driver_param,
	459	sizeof(struct renesas_usbhs_driver_param));
f1407d5c KM	460
	461	/* set driver callback functions for platform */
	462	dfunc = &info->driver_callback;
	463	dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
	464
	465	/* set default param if platform doesn't have */
48298206 KM	466	if (!priv->dparam.pipe_type) {
	467	priv->dparam.pipe_type = usbhsc_default_pipe_type;
	468	priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
f1407d5c	469	}
48298206 KM	470	if (!priv->dparam.pio_dma_border)
48298206 KM	471	priv->dparam.pio_dma_border = 64; /* 64byte */
f1407d5c	472
b002ff6e KM	473	/* FIXME */
b002ff6e KM	474	/* runtime power control ? */
48298206	475	if (priv->pfunc.get_vbus)
b002ff6e KM	476	usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
b002ff6e KM	477
f1407d5c KM	478	/*
	479	* priv settings
	480	*/
53069af3 SY	481	priv->irq = irq_res->start;
	482	if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
	483	priv->irqflags = IRQF_SHARED;
f1407d5c	484	priv->pdev = pdev;
bc57381e	485	INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
f1407d5c KM	486	spin_lock_init(usbhs_priv_to_lock(priv));
	487
	488	/* call pipe and module init */
	489	ret = usbhs_pipe_probe(priv);
	490	if (ret < 0)
58efc77c	491	return ret;
f1407d5c	492
d3af90a5	493	ret = usbhs_fifo_probe(priv);
f1407d5c	494	if (ret < 0)
97f93227	495	goto probe_end_pipe_exit;
f1407d5c	496
d3af90a5 KM	497	ret = usbhs_mod_probe(priv);
	498	if (ret < 0)
	499	goto probe_end_fifo_exit;
	500
f1407d5c KM	501	/* dev_set_drvdata should be called after usbhs_mod_init */
	502	dev_set_drvdata(&pdev->dev, priv);
	503
	504	/*
	505	* deviece reset here because
	506	* USB device might be used in boot loader.
	507	*/
	508	usbhs_sys_clock_ctrl(priv, 0);
	509
	510	/*
	511	* platform call
	512	*
	513	* USB phy setup might depend on CPU/Board.
	514	* If platform has its callback functions,
	515	* call it here.
	516	*/
	517	ret = usbhs_platform_call(priv, hardware_init, pdev);
	518	if (ret < 0) {
	519	dev_err(&pdev->dev, "platform prove failed.\n");
97f93227	520	goto probe_end_mod_exit;
f1407d5c KM	521	}
	522
	523	/* reset phy for connection */
	524	usbhs_platform_call(priv, phy_reset, pdev);
	525
b002ff6e KM	526	/* power control */
	527	pm_runtime_enable(&pdev->dev);
	528	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
	529	usbhsc_power_ctrl(priv, 1);
	530	usbhs_mod_autonomy_mode(priv);
	531	}
	532
f1407d5c KM	533	/*
	534	* manual call notify_hotplug for cold plug
	535	*/
f1407d5c KM	536	ret = usbhsc_drvcllbck_notify_hotplug(pdev);
	537	if (ret < 0)
	538	goto probe_end_call_remove;
	539
	540	dev_info(&pdev->dev, "probed\n");
	541
	542	return ret;
	543
	544	probe_end_call_remove:
	545	usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c KM	546	probe_end_mod_exit:
f1407d5c KM	547	usbhs_mod_remove(priv);
d3af90a5 KM	548	probe_end_fifo_exit:
d3af90a5 KM	549	usbhs_fifo_remove(priv);
97f93227 KM	550	probe_end_pipe_exit:
97f93227 KM	551	usbhs_pipe_remove(priv);
f1407d5c KM	552
	553	dev_info(&pdev->dev, "probe failed\n");
	554
	555	return ret;
	556	}
	557
fb4e98ab	558	static int usbhs_remove(struct platform_device *pdev)
f1407d5c	559	{
206dcc2c	560	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
af32fe51 KM	561	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
af32fe51 KM	562	struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
f1407d5c KM	563
	564	dev_dbg(&pdev->dev, "usb remove\n");
	565
af32fe51 KM	566	dfunc->notify_hotplug = NULL;
af32fe51 KM	567
b002ff6e KM	568	/* power off */
	569	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	570	usbhsc_power_ctrl(priv, 0);
f1407d5c	571
b002ff6e	572	pm_runtime_disable(&pdev->dev);
f1407d5c KM	573
f1407d5c KM	574	usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c	575	usbhs_mod_remove(priv);
d3af90a5	576	usbhs_fifo_remove(priv);
97f93227	577	usbhs_pipe_remove(priv);
f1407d5c KM	578
	579	return 0;
	580	}
	581
ca8a282a KM	582	static int usbhsc_suspend(struct device *dev)
	583	{
	584	struct usbhs_priv *priv = dev_get_drvdata(dev);
	585	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	586
	587	if (mod) {
	588	usbhs_mod_call(priv, stop, priv);
	589	usbhs_mod_change(priv, -1);
	590	}
	591
	592	if (mod \|\| !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	593	usbhsc_power_ctrl(priv, 0);
	594
	595	return 0;
	596	}
	597
	598	static int usbhsc_resume(struct device *dev)
	599	{
	600	struct usbhs_priv *priv = dev_get_drvdata(dev);
	601	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	602
a2555cd3	603	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
ca8a282a	604	usbhsc_power_ctrl(priv, 1);
a2555cd3 YS	605	usbhs_mod_autonomy_mode(priv);
a2555cd3 YS	606	}
ca8a282a	607
5b50d3b5 KM	608	usbhs_platform_call(priv, phy_reset, pdev);
	609
	610	usbhsc_drvcllbck_notify_hotplug(pdev);
ca8a282a KM	611
	612	return 0;
	613	}
	614
	615	static int usbhsc_runtime_nop(struct device *dev)
	616	{
	617	/* Runtime PM callback shared between ->runtime_suspend()
	618	* and ->runtime_resume(). Simply returns success.
	619	*
	620	* This driver re-initializes all registers after
	621	* pm_runtime_get_sync() anyway so there is no need
	622	* to save and restore registers here.
	623	*/
	624	return 0;
	625	}
	626
	627	static const struct dev_pm_ops usbhsc_pm_ops = {
	628	.suspend = usbhsc_suspend,
	629	.resume = usbhsc_resume,
	630	.runtime_suspend = usbhsc_runtime_nop,
	631	.runtime_resume = usbhsc_runtime_nop,
	632	};
	633
f1407d5c KM	634	static struct platform_driver renesas_usbhs_driver = {
	635	.driver = {
	636	.name = "renesas_usbhs",
ca8a282a	637	.pm = &usbhsc_pm_ops,
f1407d5c KM	638	},
f1407d5c KM	639	.probe = usbhs_probe,
7690417d	640	.remove = usbhs_remove,
f1407d5c KM	641	};
f1407d5c KM	642
cc27c96c	643	module_platform_driver(renesas_usbhs_driver);
f1407d5c KM	644
	645	MODULE_LICENSE("GPL");
	646	MODULE_DESCRIPTION("Renesas USB driver");
	647	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");