[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;
}

/*
 *		bus/vbus functions
 */
void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
{
	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_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);
}

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

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

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

		/* 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);
}

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
258485d9 KM	149	/*
	150	* bus/vbus functions
	151	*/
	152	void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
	153	{
	154	usbhs_bset(priv, DVSTCTR, (USBRST \| UACT), UACT);
	155	}
	156
	157	void usbhs_bus_send_reset(struct usbhs_priv *priv)
	158	{
	159	usbhs_bset(priv, DVSTCTR, (USBRST \| UACT), USBRST);
	160	}
	161
	162	int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
	163	{
	164	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	165
	166	return usbhs_platform_call(priv, set_vbus, pdev, enable);
	167	}
	168
	169	static void usbhsc_bus_init(struct usbhs_priv *priv)
	170	{
	171	usbhs_write(priv, DVSTCTR, 0);
	172
	173	usbhs_vbus_ctrl(priv, 0);
	174	}
	175
f1407d5c KM	176	/*
	177	* local functions
	178	*/
11935de5	179	static void usbhsc_set_buswait(struct usbhs_priv *priv)
f1407d5c KM	180	{
f1407d5c KM	181	int wait = usbhs_get_dparam(priv, buswait_bwait);
f1407d5c	182
11935de5 KM	183	/* set bus wait if platform have */
	184	if (wait)
	185	usbhs_bset(priv, BUSWAIT, 0x000F, wait);
f1407d5c KM	186	}
	187
	188	/*
	189	* platform default param
	190	*/
	191	static u32 usbhsc_default_pipe_type[] = {
	192	USB_ENDPOINT_XFER_CONTROL,
	193	USB_ENDPOINT_XFER_ISOC,
	194	USB_ENDPOINT_XFER_ISOC,
	195	USB_ENDPOINT_XFER_BULK,
	196	USB_ENDPOINT_XFER_BULK,
	197	USB_ENDPOINT_XFER_BULK,
	198	USB_ENDPOINT_XFER_INT,
	199	USB_ENDPOINT_XFER_INT,
	200	USB_ENDPOINT_XFER_INT,
	201	USB_ENDPOINT_XFER_INT,
	202	};
	203
	204	/*
6e267da8 KM	205	* power control
	206	*/
	207	static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
	208	{
	209	struct device *dev = usbhs_priv_to_dev(priv);
	210
	211	if (enable) {
	212	/* enable PM */
	213	pm_runtime_get_sync(dev);
	214
	215	/* USB on */
	216	usbhs_sys_clock_ctrl(priv, enable);
6e267da8 KM	217	} else {
6e267da8 KM	218	/* USB off */
6e267da8 KM	219	usbhs_sys_clock_ctrl(priv, enable);
	220
	221	/* disable PM */
	222	pm_runtime_put_sync(dev);
	223	}
	224	}
	225
	226	/*
ca8a282a	227	* hotplug
f1407d5c	228	*/
ca8a282a	229	static void usbhsc_hotplug(struct usbhs_priv *priv)
f1407d5c	230	{
f1407d5c KM	231	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	232	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	233	int id;
	234	int enable;
	235	int ret;
	236
	237	/*
	238	* get vbus status from platform
	239	*/
	240	enable = usbhs_platform_call(priv, get_vbus, pdev);
	241
	242	/*
	243	* get id from platform
	244	*/
	245	id = usbhs_platform_call(priv, get_id, pdev);
	246
	247	if (enable && !mod) {
	248	ret = usbhs_mod_change(priv, id);
	249	if (ret < 0)
	250	return;
	251
	252	dev_dbg(&pdev->dev, "%s enable\n", __func__);
	253
6e267da8	254	/* power on */
b002ff6e KM	255	if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
b002ff6e KM	256	usbhsc_power_ctrl(priv, enable);
f1407d5c	257
258485d9 KM	258	/* bus init */
	259	usbhsc_set_buswait(priv);
	260	usbhsc_bus_init(priv);
	261
f1407d5c KM	262	/* module start */
	263	usbhs_mod_call(priv, start, priv);
	264
	265	} else if (!enable && mod) {
	266	dev_dbg(&pdev->dev, "%s disable\n", __func__);
	267
	268	/* module stop */
	269	usbhs_mod_call(priv, stop, priv);
	270
258485d9 KM	271	/* bus init */
	272	usbhsc_bus_init(priv);
	273
6e267da8	274	/* power off */
b002ff6e KM	275	if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
b002ff6e KM	276	usbhsc_power_ctrl(priv, enable);
f1407d5c KM	277
	278	usbhs_mod_change(priv, -1);
	279
	280	/* reset phy for next connection */
	281	usbhs_platform_call(priv, phy_reset, pdev);
	282	}
	283	}
	284
ca8a282a KM	285	/*
	286	* notify hotplug
	287	*/
	288	static void usbhsc_notify_hotplug(struct work_struct *work)
	289	{
	290	struct usbhs_priv *priv = container_of(work,
	291	struct usbhs_priv,
	292	notify_hotplug_work.work);
	293	usbhsc_hotplug(priv);
	294	}
	295
bc57381e	296	int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
f1407d5c	297	{
206dcc2c	298	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
bc57381e	299	int delay = usbhs_get_dparam(priv, detection_delay);
f1407d5c KM	300
	301	/*
	302	* This functions will be called in interrupt.
	303	* To make sure safety context,
	304	* use workqueue for usbhs_notify_hotplug
	305	*/
bc57381e	306	schedule_delayed_work(&priv->notify_hotplug_work, delay);
f1407d5c KM	307	return 0;
	308	}
	309
	310	/*
	311	* platform functions
	312	*/
	313	static int __devinit usbhs_probe(struct platform_device *pdev)
	314	{
	315	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
	316	struct renesas_usbhs_driver_callback *dfunc;
	317	struct usbhs_priv *priv;
	318	struct resource *res;
	319	unsigned int irq;
	320	int ret;
	321
	322	/* check platform information */
	323	if (!info \|\|
b002ff6e	324	!info->platform_callback.get_id) {
f1407d5c KM	325	dev_err(&pdev->dev, "no platform information\n");
	326	return -EINVAL;
	327	}
	328
	329	/* platform data */
	330	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	331	irq = platform_get_irq(pdev, 0);
	332	if (!res \|\| (int)irq <= 0) {
	333	dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
	334	return -ENODEV;
	335	}
	336
	337	/* usb private data */
	338	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	339	if (!priv) {
	340	dev_err(&pdev->dev, "Could not allocate priv\n");
	341	return -ENOMEM;
	342	}
	343
	344	priv->base = ioremap_nocache(res->start, resource_size(res));
	345	if (!priv->base) {
	346	dev_err(&pdev->dev, "ioremap error.\n");
	347	ret = -ENOMEM;
	348	goto probe_end_kfree;
	349	}
	350
	351	/*
	352	* care platform info
	353	*/
	354	priv->pfunc = &info->platform_callback;
	355	priv->dparam = &info->driver_param;
	356
	357	/* set driver callback functions for platform */
	358	dfunc = &info->driver_callback;
	359	dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
	360
	361	/* set default param if platform doesn't have */
	362	if (!priv->dparam->pipe_type) {
	363	priv->dparam->pipe_type = usbhsc_default_pipe_type;
	364	priv->dparam->pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
	365	}
e73a9891 KM	366	if (!priv->dparam->pio_dma_border)
e73a9891 KM	367	priv->dparam->pio_dma_border = 64; /* 64byte */
f1407d5c	368
b002ff6e KM	369	/* FIXME */
	370	/* runtime power control ? */
	371	if (priv->pfunc->get_vbus)
	372	usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
	373
f1407d5c KM	374	/*
	375	* priv settings
	376	*/
	377	priv->irq = irq;
	378	priv->pdev = pdev;
bc57381e	379	INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
f1407d5c KM	380	spin_lock_init(usbhs_priv_to_lock(priv));
	381
	382	/* call pipe and module init */
	383	ret = usbhs_pipe_probe(priv);
	384	if (ret < 0)
97f93227	385	goto probe_end_iounmap;
f1407d5c	386
d3af90a5	387	ret = usbhs_fifo_probe(priv);
f1407d5c	388	if (ret < 0)
97f93227	389	goto probe_end_pipe_exit;
f1407d5c	390
d3af90a5 KM	391	ret = usbhs_mod_probe(priv);
	392	if (ret < 0)
	393	goto probe_end_fifo_exit;
	394
f1407d5c KM	395	/* dev_set_drvdata should be called after usbhs_mod_init */
	396	dev_set_drvdata(&pdev->dev, priv);
	397
	398	/*
	399	* deviece reset here because
	400	* USB device might be used in boot loader.
	401	*/
	402	usbhs_sys_clock_ctrl(priv, 0);
	403
	404	/*
	405	* platform call
	406	*
	407	* USB phy setup might depend on CPU/Board.
	408	* If platform has its callback functions,
	409	* call it here.
	410	*/
	411	ret = usbhs_platform_call(priv, hardware_init, pdev);
	412	if (ret < 0) {
	413	dev_err(&pdev->dev, "platform prove failed.\n");
97f93227	414	goto probe_end_mod_exit;
f1407d5c KM	415	}
	416
	417	/* reset phy for connection */
	418	usbhs_platform_call(priv, phy_reset, pdev);
	419
b002ff6e KM	420	/* power control */
	421	pm_runtime_enable(&pdev->dev);
	422	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
	423	usbhsc_power_ctrl(priv, 1);
	424	usbhs_mod_autonomy_mode(priv);
	425	}
	426
f1407d5c KM	427	/*
	428	* manual call notify_hotplug for cold plug
	429	*/
f1407d5c KM	430	ret = usbhsc_drvcllbck_notify_hotplug(pdev);
	431	if (ret < 0)
	432	goto probe_end_call_remove;
	433
	434	dev_info(&pdev->dev, "probed\n");
	435
	436	return ret;
	437
	438	probe_end_call_remove:
	439	usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c KM	440	probe_end_mod_exit:
f1407d5c KM	441	usbhs_mod_remove(priv);
d3af90a5 KM	442	probe_end_fifo_exit:
d3af90a5 KM	443	usbhs_fifo_remove(priv);
97f93227 KM	444	probe_end_pipe_exit:
97f93227 KM	445	usbhs_pipe_remove(priv);
f1407d5c KM	446	probe_end_iounmap:
	447	iounmap(priv->base);
	448	probe_end_kfree:
	449	kfree(priv);
	450
	451	dev_info(&pdev->dev, "probe failed\n");
	452
	453	return ret;
	454	}
	455
	456	static int __devexit usbhs_remove(struct platform_device *pdev)
	457	{
206dcc2c	458	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
af32fe51 KM	459	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
af32fe51 KM	460	struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
f1407d5c KM	461
	462	dev_dbg(&pdev->dev, "usb remove\n");
	463
af32fe51 KM	464	dfunc->notify_hotplug = NULL;
af32fe51 KM	465
b002ff6e KM	466	/* power off */
	467	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	468	usbhsc_power_ctrl(priv, 0);
f1407d5c	469
b002ff6e	470	pm_runtime_disable(&pdev->dev);
f1407d5c KM	471
f1407d5c KM	472	usbhs_platform_call(priv, hardware_exit, pdev);
f1407d5c	473	usbhs_mod_remove(priv);
d3af90a5	474	usbhs_fifo_remove(priv);
97f93227	475	usbhs_pipe_remove(priv);
f1407d5c KM	476	iounmap(priv->base);
	477	kfree(priv);
	478
	479	return 0;
	480	}
	481
ca8a282a KM	482	static int usbhsc_suspend(struct device *dev)
	483	{
	484	struct usbhs_priv *priv = dev_get_drvdata(dev);
	485	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	486
	487	if (mod) {
	488	usbhs_mod_call(priv, stop, priv);
	489	usbhs_mod_change(priv, -1);
	490	}
	491
	492	if (mod \|\| !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	493	usbhsc_power_ctrl(priv, 0);
	494
	495	return 0;
	496	}
	497
	498	static int usbhsc_resume(struct device *dev)
	499	{
	500	struct usbhs_priv *priv = dev_get_drvdata(dev);
	501	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
	502
	503	usbhs_platform_call(priv, phy_reset, pdev);
	504
	505	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
	506	usbhsc_power_ctrl(priv, 1);
	507
	508	usbhsc_hotplug(priv);
	509
	510	return 0;
	511	}
	512
	513	static int usbhsc_runtime_nop(struct device *dev)
	514	{
	515	/* Runtime PM callback shared between ->runtime_suspend()
	516	* and ->runtime_resume(). Simply returns success.
	517	*
	518	* This driver re-initializes all registers after
	519	* pm_runtime_get_sync() anyway so there is no need
	520	* to save and restore registers here.
	521	*/
	522	return 0;
	523	}
	524
	525	static const struct dev_pm_ops usbhsc_pm_ops = {
	526	.suspend = usbhsc_suspend,
	527	.resume = usbhsc_resume,
	528	.runtime_suspend = usbhsc_runtime_nop,
	529	.runtime_resume = usbhsc_runtime_nop,
	530	};
	531
f1407d5c KM	532	static struct platform_driver renesas_usbhs_driver = {
	533	.driver = {
	534	.name = "renesas_usbhs",
ca8a282a	535	.pm = &usbhsc_pm_ops,
f1407d5c KM	536	},
	537	.probe = usbhs_probe,
	538	.remove = __devexit_p(usbhs_remove),
	539	};
	540
	541	static int __init usbhs_init(void)
	542	{
	543	return platform_driver_register(&renesas_usbhs_driver);
	544	}
	545
	546	static void __exit usbhs_exit(void)
	547	{
	548	platform_driver_unregister(&renesas_usbhs_driver);
	549	}
	550
	551	module_init(usbhs_init);
	552	module_exit(usbhs_exit);
	553
	554	MODULE_LICENSE("GPL");
	555	MODULE_DESCRIPTION("Renesas USB driver");
	556	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");