[deliverable/linux.git] / drivers / usb / host / ohci-ep93xx.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 *
 * Bus Glue for ep93xx.
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
 * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for LH7A404 from ohci-sa1111.c
 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
 *
 * Modified for pxa27x from ohci-lh7a404.c
 *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
 *
 * Modified for ep93xx from ohci-pxa27x.c
 *  by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
 *  Based on an earlier driver by Ray Lehtiniemi
 *
 * This file is licenced under the GPL.
 */

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/signal.h>
#include <linux/platform_device.h>

static struct clk *usb_host_clock;

static void ep93xx_start_hc(struct device *dev)
{
	clk_enable(usb_host_clock);
}

static void ep93xx_stop_hc(struct device *dev)
{
	clk_disable(usb_host_clock);
}

static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
			 struct platform_device *pdev)
{
	struct usb_hcd *hcd;
	struct resource *res;
	int retval;

	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
		dev_dbg(&pdev->dev, "resource[1] is not IORESOURCE_IRQ\n");
		return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENXIO;

	hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
	if (hcd == NULL)
		return -ENOMEM;

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		retval = PTR_ERR(hcd->regs);
		goto err_put_hcd;
	}

	usb_host_clock = clk_get(&pdev->dev, NULL);
	if (IS_ERR(usb_host_clock)) {
		dev_dbg(&pdev->dev, "clk_get failed\n");
		retval = PTR_ERR(usb_host_clock);
		goto err_put_hcd;
	}

	ep93xx_start_hc(&pdev->dev);

	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd, pdev->resource[1].start, 0);
	if (retval == 0)
		return retval;

	ep93xx_stop_hc(&pdev->dev);
err_put_hcd:
	usb_put_hcd(hcd);

	return retval;
}

static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
			struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	ep93xx_stop_hc(&pdev->dev);
	clk_put(usb_host_clock);
	usb_put_hcd(hcd);
}

static int ohci_ep93xx_start(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int ret;

	if ((ret = ohci_init(ohci)) < 0)
		return ret;

	if ((ret = ohci_run(ohci)) < 0) {
		dev_err(hcd->self.controller, "can't start %s\n",
			hcd->self.bus_name);
		ohci_stop(hcd);
		return ret;
	}

	return 0;
}

static struct hc_driver ohci_ep93xx_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "EP93xx OHCI",
	.hcd_priv_size		= sizeof(struct ohci_hcd),
	.irq			= ohci_irq,
	.flags			= HCD_USB11 | HCD_MEMORY,
	.start			= ohci_ep93xx_start,
	.stop			= ohci_stop,
	.shutdown		= ohci_shutdown,
	.urb_enqueue		= ohci_urb_enqueue,
	.urb_dequeue		= ohci_urb_dequeue,
	.endpoint_disable	= ohci_endpoint_disable,
	.get_frame_number	= ohci_get_frame,
	.hub_status_data	= ohci_hub_status_data,
	.hub_control		= ohci_hub_control,
#ifdef CONFIG_PM
	.bus_suspend		= ohci_bus_suspend,
	.bus_resume		= ohci_bus_resume,
#endif
	.start_port_reset	= ohci_start_port_reset,
};

extern int usb_disabled(void);

static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
{
	int ret;

	ret = -ENODEV;
	if (!usb_disabled())
		ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);

	return ret;
}

static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_hcd_ep93xx_remove(hcd, pdev);

	return 0;
}

#ifdef CONFIG_PM
static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);

	if (time_before(jiffies, ohci->next_statechange))
		msleep(5);
	ohci->next_statechange = jiffies;

	ep93xx_stop_hc(&pdev->dev);
	return 0;
}

static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);

	if (time_before(jiffies, ohci->next_statechange))
		msleep(5);
	ohci->next_statechange = jiffies;

	ep93xx_start_hc(&pdev->dev);

	ohci_resume(hcd, false);
	return 0;
}
#endif


static struct platform_driver ohci_hcd_ep93xx_driver = {
	.probe		= ohci_hcd_ep93xx_drv_probe,
	.remove		= ohci_hcd_ep93xx_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
#ifdef CONFIG_PM
	.suspend	= ohci_hcd_ep93xx_drv_suspend,
	.resume		= ohci_hcd_ep93xx_drv_resume,
#endif
	.driver		= {
		.name	= "ep93xx-ohci",
		.owner	= THIS_MODULE,
	},
};

MODULE_ALIAS("platform:ep93xx-ohci");
Commit	Line	Data
a5b7474a LB	1	/*
	2	* OHCI HCD (Host Controller Driver) for USB.
	3	*
	4	* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
	5	* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
	6	* (C) Copyright 2002 Hewlett-Packard Company
	7	*
	8	* Bus Glue for ep93xx.
	9	*
	10	* Written by Christopher Hoover <ch@hpl.hp.com>
	11	* Based on fragments of previous driver by Russell King et al.
	12	*
	13	* Modified for LH7A404 from ohci-sa1111.c
	14	* by Durgesh Pattamatta <pattamattad@sharpsec.com>
	15	*
	16	* Modified for pxa27x from ohci-lh7a404.c
	17	* by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
	18	*
	19	* Modified for ep93xx from ohci-pxa27x.c
	20	* by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
	21	* Based on an earlier driver by Ray Lehtiniemi
	22	*
	23	* This file is licenced under the GPL.
	24	*/
	25
	26	#include <linux/clk.h>
	27	#include <linux/device.h>
	28	#include <linux/signal.h>
	29	#include <linux/platform_device.h>
	30
a5b7474a LB	31	static struct clk *usb_host_clock;
	32
	33	static void ep93xx_start_hc(struct device *dev)
	34	{
	35	clk_enable(usb_host_clock);
	36	}
	37
	38	static void ep93xx_stop_hc(struct device *dev)
	39	{
	40	clk_disable(usb_host_clock);
	41	}
	42
	43	static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
	44	struct platform_device *pdev)
	45	{
a5b7474a	46	struct usb_hcd *hcd;
8bd3902d HS	47	struct resource *res;
8bd3902d HS	48	int retval;
a5b7474a LB	49
a5b7474a LB	50	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
1f550c1a	51	dev_dbg(&pdev->dev, "resource[1] is not IORESOURCE_IRQ\n");
a5b7474a LB	52	return -ENOMEM;
	53	}
	54
8bd3902d HS	55	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	56	if (!res)
	57	return -ENXIO;
	58
a5b7474a LB	59	hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
	60	if (hcd == NULL)
	61	return -ENOMEM;
	62
8bd3902d HS	63	hcd->rsrc_start = res->start;
8bd3902d HS	64	hcd->rsrc_len = resource_size(res);
a5b7474a	65
8bd3902d HS	66	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	67	if (IS_ERR(hcd->regs)) {
	68	retval = PTR_ERR(hcd->regs);
	69	goto err_put_hcd;
a5b7474a LB	70	}
a5b7474a LB	71
e3a6d019 HS	72	usb_host_clock = clk_get(&pdev->dev, NULL);
e3a6d019 HS	73	if (IS_ERR(usb_host_clock)) {
1f550c1a	74	dev_dbg(&pdev->dev, "clk_get failed\n");
e3a6d019	75	retval = PTR_ERR(usb_host_clock);
8bd3902d	76	goto err_put_hcd;
e3a6d019 HS	77	}
e3a6d019 HS	78
a5b7474a LB	79	ep93xx_start_hc(&pdev->dev);
	80
	81	ohci_hcd_init(hcd_to_ohci(hcd));
	82
b5dd18d8	83	retval = usb_add_hcd(hcd, pdev->resource[1].start, 0);
a5b7474a LB	84	if (retval == 0)
	85	return retval;
	86
	87	ep93xx_stop_hc(&pdev->dev);
8bd3902d	88	err_put_hcd:
a5b7474a LB	89	usb_put_hcd(hcd);
	90
	91	return retval;
	92	}
	93
	94	static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
	95	struct platform_device *pdev)
	96	{
	97	usb_remove_hcd(hcd);
	98	ep93xx_stop_hc(&pdev->dev);
	99	clk_put(usb_host_clock);
a5b7474a LB	100	usb_put_hcd(hcd);
	101	}
	102
41ac7b3a	103	static int ohci_ep93xx_start(struct usb_hcd *hcd)
a5b7474a LB	104	{
	105	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	106	int ret;
	107
	108	if ((ret = ohci_init(ohci)) < 0)
	109	return ret;
	110
	111	if ((ret = ohci_run(ohci)) < 0) {
8d6c85e4 GKH	112	dev_err(hcd->self.controller, "can't start %s\n",
8d6c85e4 GKH	113	hcd->self.bus_name);
a5b7474a LB	114	ohci_stop(hcd);
	115	return ret;
	116	}
	117
	118	return 0;
	119	}
	120
	121	static struct hc_driver ohci_ep93xx_hc_driver = {
	122	.description = hcd_name,
	123	.product_desc = "EP93xx OHCI",
	124	.hcd_priv_size = sizeof(struct ohci_hcd),
	125	.irq = ohci_irq,
	126	.flags = HCD_USB11 \| HCD_MEMORY,
	127	.start = ohci_ep93xx_start,
	128	.stop = ohci_stop,
64a21d02	129	.shutdown = ohci_shutdown,
a5b7474a LB	130	.urb_enqueue = ohci_urb_enqueue,
	131	.urb_dequeue = ohci_urb_dequeue,
	132	.endpoint_disable = ohci_endpoint_disable,
	133	.get_frame_number = ohci_get_frame,
	134	.hub_status_data = ohci_hub_status_data,
	135	.hub_control = ohci_hub_control,
	136	#ifdef CONFIG_PM
	137	.bus_suspend = ohci_bus_suspend,
	138	.bus_resume = ohci_bus_resume,
	139	#endif
	140	.start_port_reset = ohci_start_port_reset,
	141	};
	142
	143	extern int usb_disabled(void);
	144
	145	static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
	146	{
	147	int ret;
	148
	149	ret = -ENODEV;
	150	if (!usb_disabled())
	151	ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
	152
	153	return ret;
	154	}
	155
	156	static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
	157	{
	158	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	159
	160	usb_hcd_ep93xx_remove(hcd, pdev);
	161
	162	return 0;
	163	}
	164
	165	#ifdef CONFIG_PM
	166	static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
	167	{
	168	struct usb_hcd *hcd = platform_get_drvdata(pdev);
caaf2632	169	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
a5b7474a LB	170
	171	if (time_before(jiffies, ohci->next_statechange))
	172	msleep(5);
	173	ohci->next_statechange = jiffies;
	174
	175	ep93xx_stop_hc(&pdev->dev);
a5b7474a LB	176	return 0;
	177	}
	178
	179	static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
	180	{
	181	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	182	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
a5b7474a LB	183
	184	if (time_before(jiffies, ohci->next_statechange))
	185	msleep(5);
	186	ohci->next_statechange = jiffies;
	187
	188	ep93xx_start_hc(&pdev->dev);
a5b7474a	189
cfa49b4b	190	ohci_resume(hcd, false);
a5b7474a LB	191	return 0;
	192	}
	193	#endif
	194
	195
	196	static struct platform_driver ohci_hcd_ep93xx_driver = {
	197	.probe = ohci_hcd_ep93xx_drv_probe,
	198	.remove = ohci_hcd_ep93xx_drv_remove,
dd9048af	199	.shutdown = usb_hcd_platform_shutdown,
a5b7474a LB	200	#ifdef CONFIG_PM
	201	.suspend = ohci_hcd_ep93xx_drv_suspend,
	202	.resume = ohci_hcd_ep93xx_drv_resume,
	203	#endif
	204	.driver = {
	205	.name = "ep93xx-ohci",
f4fce61d	206	.owner = THIS_MODULE,
a5b7474a LB	207	},
	208	};
	209
f4fce61d	210	MODULE_ALIAS("platform:ep93xx-ohci");