[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>

#include <mach/hardware.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)
{
	int retval;
	struct usb_hcd *hcd;

	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
		pr_debug("resource[1] is not IORESOURCE_IRQ");
		return -ENOMEM;
	}

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

	hcd->rsrc_start = pdev->resource[0].start;
	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		usb_put_hcd(hcd);
		retval = -EBUSY;
		goto err1;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (hcd->regs == NULL) {
		pr_debug("ioremap failed");
		retval = -ENOMEM;
		goto err2;
	}

	usb_host_clock = clk_get(&pdev->dev, "usb_host");
	ep93xx_start_hc(&pdev->dev);

	ohci_hcd_init(hcd_to_ohci(hcd));

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

	ep93xx_stop_hc(&pdev->dev);
	iounmap(hcd->regs);
err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
	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);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

static int __devinit 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) {
		err("can't start %s", 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,
	.hub_irq_enable		= ohci_rhsc_enable,
#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);
	hcd->state = HC_STATE_SUSPENDED;

	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);
	int status;

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

	ep93xx_start_hc(&pdev->dev);

	ohci_finish_controller_resume(hcd);
	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
a09e64fb	31	#include <mach/hardware.h>
a5b7474a LB	32
	33	static struct clk *usb_host_clock;
	34
	35	static void ep93xx_start_hc(struct device *dev)
	36	{
	37	clk_enable(usb_host_clock);
	38	}
	39
	40	static void ep93xx_stop_hc(struct device *dev)
	41	{
	42	clk_disable(usb_host_clock);
	43	}
	44
	45	static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
	46	struct platform_device *pdev)
	47	{
	48	int retval;
	49	struct usb_hcd *hcd;
	50
	51	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
	52	pr_debug("resource[1] is not IORESOURCE_IRQ");
	53	return -ENOMEM;
	54	}
	55
	56	hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
	57	if (hcd == NULL)
	58	return -ENOMEM;
	59
	60	hcd->rsrc_start = pdev->resource[0].start;
	61	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	62	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	63	usb_put_hcd(hcd);
	64	retval = -EBUSY;
	65	goto err1;
	66	}
	67
	68	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	69	if (hcd->regs == NULL) {
	70	pr_debug("ioremap failed");
	71	retval = -ENOMEM;
	72	goto err2;
	73	}
	74
	75	usb_host_clock = clk_get(&pdev->dev, "usb_host");
	76	ep93xx_start_hc(&pdev->dev);
	77
	78	ohci_hcd_init(hcd_to_ohci(hcd));
	79
38515e90	80	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
a5b7474a LB	81	if (retval == 0)
	82	return retval;
	83
	84	ep93xx_stop_hc(&pdev->dev);
	85	iounmap(hcd->regs);
	86	err2:
	87	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	88	err1:
	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);
	100	iounmap(hcd->regs);
	101	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	102	usb_put_hcd(hcd);
	103	}
	104
	105	static int __devinit ohci_ep93xx_start(struct usb_hcd *hcd)
	106	{
	107	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	108	int ret;
	109
	110	if ((ret = ohci_init(ohci)) < 0)
	111	return ret;
	112
	113	if ((ret = ohci_run(ohci)) < 0) {
	114	err("can't start %s", hcd->self.bus_name);
	115	ohci_stop(hcd);
	116	return ret;
	117	}
	118
	119	return 0;
	120	}
	121
	122	static struct hc_driver ohci_ep93xx_hc_driver = {
	123	.description = hcd_name,
	124	.product_desc = "EP93xx OHCI",
	125	.hcd_priv_size = sizeof(struct ohci_hcd),
	126	.irq = ohci_irq,
	127	.flags = HCD_USB11 \| HCD_MEMORY,
	128	.start = ohci_ep93xx_start,
	129	.stop = ohci_stop,
64a21d02	130	.shutdown = ohci_shutdown,
a5b7474a LB	131	.urb_enqueue = ohci_urb_enqueue,
	132	.urb_dequeue = ohci_urb_dequeue,
	133	.endpoint_disable = ohci_endpoint_disable,
	134	.get_frame_number = ohci_get_frame,
	135	.hub_status_data = ohci_hub_status_data,
	136	.hub_control = ohci_hub_control,
09ca8adb	137	.hub_irq_enable = ohci_rhsc_enable,
a5b7474a LB	138	#ifdef CONFIG_PM
	139	.bus_suspend = ohci_bus_suspend,
	140	.bus_resume = ohci_bus_resume,
	141	#endif
	142	.start_port_reset = ohci_start_port_reset,
	143	};
	144
	145	extern int usb_disabled(void);
	146
	147	static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
	148	{
	149	int ret;
	150
	151	ret = -ENODEV;
	152	if (!usb_disabled())
	153	ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
	154
	155	return ret;
	156	}
	157
	158	static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
	159	{
	160	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	161
	162	usb_hcd_ep93xx_remove(hcd, pdev);
	163
	164	return 0;
	165	}
	166
	167	#ifdef CONFIG_PM
	168	static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
	169	{
	170	struct usb_hcd *hcd = platform_get_drvdata(pdev);
caaf2632	171	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
a5b7474a LB	172
	173	if (time_before(jiffies, ohci->next_statechange))
	174	msleep(5);
	175	ohci->next_statechange = jiffies;
	176
	177	ep93xx_stop_hc(&pdev->dev);
	178	hcd->state = HC_STATE_SUSPENDED;
a5b7474a LB	179
	180	return 0;
	181	}
	182
	183	static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
	184	{
	185	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	186	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	187	int status;
	188
	189	if (time_before(jiffies, ohci->next_statechange))
	190	msleep(5);
	191	ohci->next_statechange = jiffies;
	192
	193	ep93xx_start_hc(&pdev->dev);
a5b7474a	194
43bbb7e0	195	ohci_finish_controller_resume(hcd);
a5b7474a LB	196	return 0;
	197	}
	198	#endif
	199
	200
	201	static struct platform_driver ohci_hcd_ep93xx_driver = {
	202	.probe = ohci_hcd_ep93xx_drv_probe,
	203	.remove = ohci_hcd_ep93xx_drv_remove,
dd9048af	204	.shutdown = usb_hcd_platform_shutdown,
a5b7474a LB	205	#ifdef CONFIG_PM
	206	.suspend = ohci_hcd_ep93xx_drv_suspend,
	207	.resume = ohci_hcd_ep93xx_drv_resume,
	208	#endif
	209	.driver = {
	210	.name = "ep93xx-ohci",
f4fce61d	211	.owner = THIS_MODULE,
a5b7474a LB	212	},
	213	};
	214
f4fce61d	215	MODULE_ALIAS("platform:ep93xx-ohci");