[deliverable/linux.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/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
 */
void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
{
	usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
}

void usbhs_sys_hispeed_ctrl(struct usbhs_priv *priv, int enable)
{
	usbhs_bset(priv, SYSCFG, HSE, enable ? HSE : 0);
}

void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable)
{
	usbhs_bset(priv, SYSCFG, USBE, enable ? USBE : 0);
}

void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
{
	u16 mask = DCFM | DRPD | DPRPU;
	u16 val  = DCFM | DRPD;

	/*
	 * 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;
	u16 val  = DPRPU;

	/*
	 * if enable
	 *
	 * - select Function mode
	 * - D+ Line Pull-up
	 */
	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
}

/*
 *		frame functions
 */
int usbhs_frame_get_num(struct usbhs_priv *priv)
{
	return usbhs_read(priv, FRMNUM) & FRNM_MASK;
}

/*
 *		local functions
 */
static void usbhsc_bus_ctrl(struct usbhs_priv *priv, int enable)
{
	int wait = usbhs_get_dparam(priv, buswait_bwait);
	u16 data = 0;

	if (enable) {
		/* set bus wait if platform have */
		if (wait)
			usbhs_bset(priv, BUSWAIT, 0x000F, wait);
	}
	usbhs_write(priv, DVSTCTR, data);
}

/*
 *		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 device *dev = usbhs_priv_to_dev(priv);

	if (enable) {
		/* enable PM */
		pm_runtime_get_sync(dev);

		/* USB on */
		usbhs_sys_clock_ctrl(priv, enable);
		usbhsc_bus_ctrl(priv, enable);
	} else {
		/* USB off */
		usbhsc_bus_ctrl(priv, enable);
		usbhs_sys_clock_ctrl(priv, 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);

		/* 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);

		/* 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);
}

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, delay);
	return 0;
}

/*
 *		platform functions
 */
static int __devinit 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;
	unsigned int irq;
	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 = platform_get_irq(pdev, 0);
	if (!res || (int)irq <= 0) {
		dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
		return -ENODEV;
	}

	/* usb private data */
	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&pdev->dev, "Could not allocate priv\n");
		return -ENOMEM;
	}

	priv->base = ioremap_nocache(res->start, resource_size(res));
	if (!priv->base) {
		dev_err(&pdev->dev, "ioremap error.\n");
		ret = -ENOMEM;
		goto probe_end_kfree;
	}

	/*
	 * care platform info
	 */
	priv->pfunc	= &info->platform_callback;
	priv->dparam	= &info->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;
	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)
		goto probe_end_iounmap;

	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);
probe_end_iounmap:
	iounmap(priv->base);
probe_end_kfree:
	kfree(priv);

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

	return ret;
}

static int __devexit 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);
	iounmap(priv->base);
	kfree(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);

	usbhs_platform_call(priv, phy_reset, pdev);

	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
		usbhsc_power_ctrl(priv, 1);

	usbhsc_hotplug(priv);

	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		= __devexit_p(usbhs_remove),
};

static int __init usbhs_init(void)
{
	return platform_driver_register(&renesas_usbhs_driver);
}

static void __exit usbhs_exit(void)
{
	platform_driver_unregister(&renesas_usbhs_driver);
}

module_init(usbhs_init);
module_exit(usbhs_exit);

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	*/
	17	#include <linux/io.h>
	18	#include <linux/module.h>
	19	#include <linux/pm_runtime.h>
	20	#include <linux/slab.h>
	21	#include <linux/sysfs.h>
	22	#include "./common.h"
	23
233f519d KM	24	/*
	25	* image of renesas_usbhs
	26	*
	27	* ex) gadget case
	28
	29	* mod.c
	30	* mod_gadget.c
	31	* mod_host.c pipe.c fifo.c
	32	*
	33	* +-------+ +-----------+
	34	* \| pipe0 \|------>\| fifo pio \|
	35	* +------------+ +-------+ +-----------+
	36	* \| mod_gadget \|=====> \| pipe1 \|--+
	37	* +------------+ +-------+ \| +-----------+
	38	* \| pipe2 \| \| +-\| fifo dma0 \|
	39	* +------------+ +-------+ \| \| +-----------+
	40	* \| mod_host \| \| pipe3 \|<-\|--+
	41	* +------------+ +-------+ \| +-----------+
	42	* \| .... \| +--->\| fifo dma1 \|
	43	* \| .... \| +-----------+
	44	*/
	45
	46
b002ff6e KM	47	#define USBHSF_RUNTIME_PWCTRL (1 << 0)
	48
	49	/* status */
	50	#define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
	51	#define usbhsc_flags_set(p, b) ((p)->flags \|= (b))
	52	#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
	53	#define usbhsc_flags_has(p, b) ((p)->flags & (b))
	54
f1407d5c KM	55	/*
	56	* platform call back
	57	*
	58	* renesas usb support platform callback function.
	59	* Below macro call it.
	60	* if platform doesn't have callback, it return 0 (no error)
	61	*/
	62	#define usbhs_platform_call(priv, func, args...)\
	63	(!(priv) ? -ENODEV : \
	64	!((priv)->pfunc->func) ? 0 : \
	65	(priv)->pfunc->func(args))
	66
	67	/*
	68	* common functions
	69	*/
	70	u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
	71	{
	72	return ioread16(priv->base + reg);
	73	}
	74
	75	void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
	76	{
	77	iowrite16(data, priv->base + reg);
	78	}
	79
	80	void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
	81	{
	82	u16 val = usbhs_read(priv, reg);
	83
	84	val &= ~mask;
	85	val \|= data & mask;
	86
	87	usbhs_write(priv, reg, val);
	88	}
	89
206dcc2c KM	90	struct usbhs_priv usbhs_pdev_to_priv(struct platform_device pdev)
	91	{
	92	return dev_get_drvdata(&pdev->dev);
	93	}
	94
f1407d5c KM	95	/*
	96	* syscfg functions
	97	*/
	98	void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
	99	{
	100	usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
	101	}
	102
	103	void usbhs_sys_hispeed_ctrl(struct usbhs_priv *priv, int enable)
	104	{
	105	usbhs_bset(priv, SYSCFG, HSE, enable ? HSE : 0);
	106	}
	107
	108	void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable)
	109	{
	110	usbhs_bset(priv, SYSCFG, USBE, enable ? USBE : 0);
	111	}
	112
	113	void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
	114	{
	115	u16 mask = DCFM \| DRPD \| DPRPU;
	116	u16 val = DCFM \| DRPD;
	117
	118	/*
	119	* if enable
	120	*
	121	* - select Host mode
	122	* - D+ Line/D- Line Pull-down
	123	*/
	124	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
	125	}
	126
	127	void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
	128	{
	129	u16 mask = DCFM \| DRPD \| DPRPU;
	130	u16 val = DPRPU;
	131
	132	/*
	133	* if enable
	134	*
	135	* - select Function mode
	136	* - D+ Line Pull-up
	137	*/
	138	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
	139	}
	140
	141	/*
	142	* frame functions
	143	*/
	144	int usbhs_frame_get_num(struct usbhs_priv *priv)
	145	{
	146	return usbhs_read(priv, FRMNUM) & FRNM_MASK;
	147	}
	148
	149	/*
	150	* local functions
	151	*/
f1407d5c KM	152	static void usbhsc_bus_ctrl(struct usbhs_priv *priv, int enable)
	153	{
	154	int wait = usbhs_get_dparam(priv, buswait_bwait);
	155	u16 data = 0;
	156
	157	if (enable) {
	158	/* set bus wait if platform have */
	159	if (wait)
	160	usbhs_bset(priv, BUSWAIT, 0x000F, wait);
	161	}
	162	usbhs_write(priv, DVSTCTR, data);
	163	}
	164
	165	/*
	166	* platform default param
	167	*/
	168	static u32 usbhsc_default_pipe_type[] = {
	169	USB_ENDPOINT_XFER_CONTROL,
	170	USB_ENDPOINT_XFER_ISOC,
	171	USB_ENDPOINT_XFER_ISOC,
	172	USB_ENDPOINT_XFER_BULK,
	173	USB_ENDPOINT_XFER_BULK,
	174	USB_ENDPOINT_XFER_BULK,
	175	USB_ENDPOINT_XFER_INT,
	176	USB_ENDPOINT_XFER_INT,
	177	USB_ENDPOINT_XFER_INT,
	178	USB_ENDPOINT_XFER_INT,
	179	};
	180
	181	/*
6e267da8 KM	182	* power control
	183	*/
	184	static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
	185	{
	186	struct device *dev = usbhs_priv_to_dev(priv);
	187
	188	if (enable) {
	189	/* enable PM */
	190	pm_runtime_get_sync(dev);
	191
	192	/* USB on */
	193	usbhs_sys_clock_ctrl(priv, enable);
	194	usbhsc_bus_ctrl(priv, enable);
	195	} else {
	196	/* USB off */
	197	usbhsc_bus_ctrl(priv, enable);
	198	usbhs_sys_clock_ctrl(priv, enable);
	199
	200	/* disable PM */
	201	pm_runtime_put_sync(dev);
	202	}
	203	}
	204
	205	/*
ca8a282a	206	* hotplug
f1407d5c	207	*/
ca8a282a	208	static void usbhsc_hotplug(struct usbhs_priv *priv)
f1407d5c	209	{
f1407d5c KM	210	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	211	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	212	int id;
	213	int enable;
	214	int ret;
	215
	216	/*
	217	* get vbus status from platform
	218	*/
	219	enable = usbhs_platform_call(priv, get_vbus, pdev);
	220
	221	/*
	222	* get id from platform
	223	*/
	224	id = usbhs_platform_call(priv, get_id, pdev);
	225
	226	if (enable && !mod) {
	227	ret = usbhs_mod_change(priv, id);
	228	if (ret < 0)
	229	return;
	230
	231	dev_dbg(&pdev->dev, "%s enable\n", __func__);
	232
6e267da8	233	/* power on */
b002ff6e KM	234	if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
b002ff6e KM	235	usbhsc_power_ctrl(priv, enable);
f1407d5c KM	236
	237	/* module start */
	238	usbhs_mod_call(priv, start, priv);
	239
	240	} else if (!enable && mod) {
	241	dev_dbg(&pdev->dev, "%s disable\n", __func__);
	242
	243	/* module stop */
	244	usbhs_mod_call(priv, stop, priv);
	245
6e267da8	246	/* power off */
b002ff6e KM	247	if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
b002ff6e KM	248	usbhsc_power_ctrl(priv, enable);
f1407d5c KM	249
	250	usbhs_mod_change(priv, -1);
	251
	252	/* reset phy for next connection */
	253	usbhs_platform_call(priv, phy_reset, pdev);
	254	}
	255	}
	256
ca8a282a KM	257	/*
	258	* notify hotplug
	259	*/
	260	static void usbhsc_notify_hotplug(struct work_struct *work)
	261	{
	262	struct usbhs_priv *priv = container_of(work,
	263	struct usbhs_priv,
	264	notify_hotplug_work.work);
	265	usbhsc_hotplug(priv);
	266	}
	267
bc57381e	268	int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
f1407d5c	269	{
206dcc2c	270	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
bc57381e	271	int delay = usbhs_get_dparam(priv, detection_delay);
f1407d5c KM	272
	273	/*
	274	* This functions will be called in interrupt.
	275	* To make sure safety context,
	276	* use workqueue for usbhs_notify_hotplug
	277	*/
bc57381e	278	schedule_delayed_work(&priv->notify_hotplug_work, delay);
f1407d5c KM	279	return 0;
	280	}
	281
	282	/*
	283	* platform functions
	284	*/
	285	static int __devinit usbhs_probe(struct platform_device *pdev)
	286	{
	287	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
	288	struct renesas_usbhs_driver_callback *dfunc;
	289	struct usbhs_priv *priv;
	290	struct resource *res;
	291	unsigned int irq;
	292	int ret;
	293
	294	/* check platform information */
	295	if (!info \|\|
b002ff6e	296	!info->platform_callback.get_id) {
f1407d5c KM	297	dev_err(&pdev->dev, "no platform information\n");
	298	return -EINVAL;
	299	}
	300
	301	/* platform data */
	302	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	303	irq = platform_get_irq(pdev, 0);
	304	if (!res \|\| (int)irq <= 0) {
	305	dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
	306	return -ENODEV;
	307	}
	308
	309	/* usb private data */
	310	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	311	if (!priv) {
	312	dev_err(&pdev->dev, "Could not allocate priv\n");
	313	return -ENOMEM;
	314	}
	315
	316	priv->base = ioremap_nocache(res->start, resource_size(res));
	317	if (!priv->base) {
	318	dev_err(&pdev->dev, "ioremap error.\n");
	319	ret = -ENOMEM;
	320	goto probe_end_kfree;
	321	}
	322
	323	/*
	324	* care platform info
	325	*/
	326	priv->pfunc = &info->platform_callback;
	327	priv->dparam = &info->driver_param;
	328
	329	/* set driver callback functions for platform */
	330	dfunc = &info->driver_callback;
	331	dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
	332
	333	/* set default param if platform doesn't have */
	334	if (!priv->dparam->pipe_type) {
	335	priv->dparam->pipe_type = usbhsc_default_pipe_type;
	336	priv->dparam->pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
	337	}
e73a9891 KM	338	if (!priv->dparam->pio_dma_border)
e73a9891 KM	339	priv->dparam->pio_dma_border = 64; /* 64byte */
f1407d5c	340
b002ff6e KM	341	/* FIXME */
	342	/* runtime power control ? */
	343	if (priv->pfunc->get_vbus)
	344	usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
	345
f1407d5c KM	346	/*
	347	* priv settings
	348	*/
	349	priv->irq = irq;
	350	priv->pdev = pdev;
bc57381e	351	INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
f1407d5c KM	352	spin_lock_init(usbhs_priv_to_lock(priv));
	353
	354	/* call pipe and module init */
	355	ret = usbhs_pipe_probe(priv);
	356	if (ret < 0)
97f93227	357	goto probe_end_iounmap;
f1407d5c	358
d3af90a5	359	ret = usbhs_fifo_probe(priv);
f1407d5c	360	if (ret < 0)
97f93227	361	goto probe_end_pipe_exit;
f1407d5c	362
d3af90a5 KM	363	ret = usbhs_mod_probe(priv);
	364	if (ret < 0)
	365	goto probe_end_fifo_exit;
	366
f1407d5c KM	367	/* dev_set_drvdata should be called after usbhs_mod_init */
	368	dev_set_drvdata(&pdev->dev, priv);
	369
	370	/*
	371	* deviece reset here because
	372	* USB device might be used in boot loader.
	373	*/
	374	usbhs_sys_clock_ctrl(priv, 0);
	375
	376	/*
	377	* platform call
	378	*
	379	* USB phy setup might depend on CPU/Board.
	380	* If platform has its callback functions,
	381	* call it here.
	382	*/
	383	ret = usbhs_platform_call(priv, hardware_init, pdev);
	384	if (ret < 0) {
	385	dev_err(&pdev->dev, "platform prove failed.\n");
97f93227	386	goto probe_end_mod_exit;
f1407d5c KM	387	}
	388
	389	/* reset phy for connection */
	390	usbhs_platform_call(priv, phy_reset, pdev);
	391
b002ff6e KM	392	/* power control */
	393	pm_runtime_enable(&pdev->dev);
	394	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
	395	usbhsc_power_ctrl(priv, 1);
	396	usbhs_mod_autonomy_mode(priv);
	397	}
	398
f1407d5c KM	399	/*
	400	* manual call notify_hotplug for cold plug
	401	*/
f1407d5c KM	402	ret = usbhsc_drvcllbck_notify_hotplug(pdev);
	403	if (ret < 0)
	404	goto probe_end_call_remove;
	405
	406	dev_info(&pdev->dev, "probed\n");
	407
	408	return ret;
	409
	410	probe_end_call_remove:
	411	usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c KM	412	probe_end_mod_exit:
f1407d5c KM	413	usbhs_mod_remove(priv);
d3af90a5 KM	414	probe_end_fifo_exit:
d3af90a5 KM	415	usbhs_fifo_remove(priv);
97f93227 KM	416	probe_end_pipe_exit:
97f93227 KM	417	usbhs_pipe_remove(priv);
f1407d5c KM	418	probe_end_iounmap:
	419	iounmap(priv->base);
	420	probe_end_kfree:
	421	kfree(priv);
	422
	423	dev_info(&pdev->dev, "probe failed\n");
	424
	425	return ret;
	426	}
	427
	428	static int __devexit usbhs_remove(struct platform_device *pdev)
	429	{
206dcc2c	430	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
af32fe51 KM	431	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
af32fe51 KM	432	struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
f1407d5c KM	433
	434	dev_dbg(&pdev->dev, "usb remove\n");
	435
af32fe51 KM	436	dfunc->notify_hotplug = NULL;
af32fe51 KM	437
b002ff6e KM	438	/* power off */
	439	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	440	usbhsc_power_ctrl(priv, 0);
f1407d5c	441
b002ff6e	442	pm_runtime_disable(&pdev->dev);
f1407d5c KM	443
f1407d5c KM	444	usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c	445	usbhs_mod_remove(priv);
d3af90a5	446	usbhs_fifo_remove(priv);
97f93227	447	usbhs_pipe_remove(priv);
f1407d5c KM	448	iounmap(priv->base);
	449	kfree(priv);
	450
	451	return 0;
	452	}
	453
ca8a282a KM	454	static int usbhsc_suspend(struct device *dev)
	455	{
	456	struct usbhs_priv *priv = dev_get_drvdata(dev);
	457	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	458
	459	if (mod) {
	460	usbhs_mod_call(priv, stop, priv);
	461	usbhs_mod_change(priv, -1);
	462	}
	463
	464	if (mod \|\| !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	465	usbhsc_power_ctrl(priv, 0);
	466
	467	return 0;
	468	}
	469
	470	static int usbhsc_resume(struct device *dev)
	471	{
	472	struct usbhs_priv *priv = dev_get_drvdata(dev);
	473	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	474
	475	usbhs_platform_call(priv, phy_reset, pdev);
	476
	477	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	478	usbhsc_power_ctrl(priv, 1);
	479
	480	usbhsc_hotplug(priv);
	481
	482	return 0;
	483	}
	484
	485	static int usbhsc_runtime_nop(struct device *dev)
	486	{
	487	/* Runtime PM callback shared between ->runtime_suspend()
	488	* and ->runtime_resume(). Simply returns success.
	489	*
	490	* This driver re-initializes all registers after
	491	* pm_runtime_get_sync() anyway so there is no need
	492	* to save and restore registers here.
	493	*/
	494	return 0;
	495	}
	496
	497	static const struct dev_pm_ops usbhsc_pm_ops = {
	498	.suspend = usbhsc_suspend,
	499	.resume = usbhsc_resume,
	500	.runtime_suspend = usbhsc_runtime_nop,
	501	.runtime_resume = usbhsc_runtime_nop,
	502	};
	503
f1407d5c KM	504	static struct platform_driver renesas_usbhs_driver = {
	505	.driver = {
	506	.name = "renesas_usbhs",
ca8a282a	507	.pm = &usbhsc_pm_ops,
f1407d5c KM	508	},
	509	.probe = usbhs_probe,
	510	.remove = __devexit_p(usbhs_remove),
	511	};
	512
	513	static int __init usbhs_init(void)
	514	{
	515	return platform_driver_register(&renesas_usbhs_driver);
	516	}
	517
	518	static void __exit usbhs_exit(void)
	519	{
	520	platform_driver_unregister(&renesas_usbhs_driver);
	521	}
	522
	523	module_init(usbhs_init);
	524	module_exit(usbhs_exit);
	525
	526	MODULE_LICENSE("GPL");
	527	MODULE_DESCRIPTION("Renesas USB driver");
	528	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");