[deliverable/linux.git] / drivers / usb / host / ehci-platform.c

/*
 * Generic platform ehci driver
 *
 * Copyright 2007 Steven Brown <sbrown@cortland.com>
 * Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
 *
 * Derived from the ohci-ssb driver
 * Copyright 2007 Michael Buesch <m@bues.ch>
 *
 * Derived from the EHCI-PCI driver
 * Copyright (c) 2000-2004 by David Brownell
 *
 * Derived from the ohci-pci driver
 * Copyright 1999 Roman Weissgaerber
 * Copyright 2000-2002 David Brownell
 * Copyright 1999 Linus Torvalds
 * Copyright 1999 Gregory P. Smith
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */
#include <linux/kernel.h>
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ehci_pdriver.h>

#include "ehci.h"

#define DRIVER_DESC "EHCI generic platform driver"

static const char hcd_name[] = "ehci-platform";

static int ehci_platform_reset(struct usb_hcd *hcd)
{
	struct platform_device *pdev = to_platform_device(hcd->self.controller);
	struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;

	hcd->has_tt = pdata->has_tt;
	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
	ehci->big_endian_desc = pdata->big_endian_desc;
	ehci->big_endian_mmio = pdata->big_endian_mmio;

	ehci->caps = hcd->regs + pdata->caps_offset;
	retval = ehci_setup(hcd);
	if (retval)
		return retval;

	if (pdata->no_io_watchdog)
		ehci->need_io_watchdog = 0;
	return 0;
}

static struct hc_driver __read_mostly ehci_platform_hc_driver;

static const struct ehci_driver_overrides platform_overrides __initdata = {
	.reset =	ehci_platform_reset,
};

static int ehci_platform_probe(struct platform_device *dev)
{
	struct usb_hcd *hcd;
	struct resource *res_mem;
	struct usb_ehci_pdata *pdata = dev->dev.platform_data;
	int irq;
	int err = -ENOMEM;

	if (!pdata) {
		WARN_ON(1);
		return -ENODEV;
	}

	if (usb_disabled())
		return -ENODEV;

	irq = platform_get_irq(dev, 0);
	if (irq < 0) {
		dev_err(&dev->dev, "no irq provided");
		return irq;
	}
	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!res_mem) {
		dev_err(&dev->dev, "no memory resource provided");
		return -ENXIO;
	}

	if (pdata->power_on) {
		err = pdata->power_on(dev);
		if (err < 0)
			return err;
	}

	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
			     dev_name(&dev->dev));
	if (!hcd) {
		err = -ENOMEM;
		goto err_power;
	}

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

	hcd->regs = devm_request_and_ioremap(&dev->dev, res_mem);
	if (!hcd->regs) {
		err = -ENOMEM;
		goto err_put_hcd;
	}
	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err)
		goto err_put_hcd;

	platform_set_drvdata(dev, hcd);

	return err;

err_put_hcd:
	usb_put_hcd(hcd);
err_power:
	if (pdata->power_off)
		pdata->power_off(dev);

	return err;
}

static int ehci_platform_remove(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct usb_ehci_pdata *pdata = dev->dev.platform_data;

	usb_remove_hcd(hcd);
	usb_put_hcd(hcd);
	platform_set_drvdata(dev, NULL);

	if (pdata->power_off)
		pdata->power_off(dev);

	return 0;
}

#ifdef CONFIG_PM

static int ehci_platform_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ehci_pdata *pdata = dev->platform_data;
	struct platform_device *pdev =
		container_of(dev, struct platform_device, dev);
	bool do_wakeup = device_may_wakeup(dev);
	int ret;

	ret = ehci_suspend(hcd, do_wakeup);

	if (pdata->power_suspend)
		pdata->power_suspend(pdev);

	return ret;
}

static int ehci_platform_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ehci_pdata *pdata = dev->platform_data;
	struct platform_device *pdev =
		container_of(dev, struct platform_device, dev);

	if (pdata->power_on) {
		int err = pdata->power_on(pdev);
		if (err < 0)
			return err;
	}

	ehci_resume(hcd, false);
	return 0;
}

#else /* !CONFIG_PM */
#define ehci_platform_suspend	NULL
#define ehci_platform_resume	NULL
#endif /* CONFIG_PM */

static const struct platform_device_id ehci_platform_table[] = {
	{ "ehci-platform", 0 },
	{ }
};
MODULE_DEVICE_TABLE(platform, ehci_platform_table);

static const struct dev_pm_ops ehci_platform_pm_ops = {
	.suspend	= ehci_platform_suspend,
	.resume		= ehci_platform_resume,
};

static struct platform_driver ehci_platform_driver = {
	.id_table	= ehci_platform_table,
	.probe		= ehci_platform_probe,
	.remove		= ehci_platform_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "ehci-platform",
		.pm	= &ehci_platform_pm_ops,
	}
};

static int __init ehci_platform_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);

	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	return platform_driver_register(&ehci_platform_driver);
}
module_init(ehci_platform_init);

static void __exit ehci_platform_cleanup(void)
{
	platform_driver_unregister(&ehci_platform_driver);
}
module_exit(ehci_platform_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_AUTHOR("Alan Stern");
MODULE_LICENSE("GPL");
Commit	Line	Data
7a7a4a59 HM	1	/*
	2	* Generic platform ehci driver
	3	*
	4	* Copyright 2007 Steven Brown <sbrown@cortland.com>
	5	* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
	6	*
	7	* Derived from the ohci-ssb driver
	8	* Copyright 2007 Michael Buesch <m@bues.ch>
	9	*
	10	* Derived from the EHCI-PCI driver
	11	* Copyright (c) 2000-2004 by David Brownell
	12	*
	13	* Derived from the ohci-pci driver
	14	* Copyright 1999 Roman Weissgaerber
	15	* Copyright 2000-2002 David Brownell
	16	* Copyright 1999 Linus Torvalds
	17	* Copyright 1999 Gregory P. Smith
	18	*
	19	* Licensed under the GNU/GPL. See COPYING for details.
	20	*/
99f91934	21	#include <linux/kernel.h>
d1bb67a7 AS	22	#include <linux/hrtimer.h>
d1bb67a7 AS	23	#include <linux/io.h>
99f91934	24	#include <linux/module.h>
7a7a4a59	25	#include <linux/platform_device.h>
99f91934 AS	26	#include <linux/usb.h>
99f91934 AS	27	#include <linux/usb/hcd.h>
7a7a4a59 HM	28	#include <linux/usb/ehci_pdriver.h>
7a7a4a59 HM	29
99f91934 AS	30	#include "ehci.h"
	31
	32	#define DRIVER_DESC "EHCI generic platform driver"
	33
	34	static const char hcd_name[] = "ehci-platform";
	35
7a7a4a59 HM	36	static int ehci_platform_reset(struct usb_hcd *hcd)
	37	{
	38	struct platform_device *pdev = to_platform_device(hcd->self.controller);
	39	struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
	40	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	41	int retval;
	42
	43	hcd->has_tt = pdata->has_tt;
	44	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
	45	ehci->big_endian_desc = pdata->big_endian_desc;
	46	ehci->big_endian_mmio = pdata->big_endian_mmio;
	47
	48	ehci->caps = hcd->regs + pdata->caps_offset;
	49	retval = ehci_setup(hcd);
	50	if (retval)
	51	return retval;
	52
4534874a FF	53	if (pdata->no_io_watchdog)
4534874a FF	54	ehci->need_io_watchdog = 0;
7a7a4a59 HM	55	return 0;
	56	}
	57
99f91934	58	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	59
1b36810e	60	static const struct ehci_driver_overrides platform_overrides __initdata = {
99f91934	61	.reset = ehci_platform_reset,
7a7a4a59 HM	62	};
7a7a4a59 HM	63
41ac7b3a	64	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	65	{
	66	struct usb_hcd *hcd;
	67	struct resource *res_mem;
86e4cb35	68	struct usb_ehci_pdata *pdata = dev->dev.platform_data;
7a7a4a59 HM	69	int irq;
	70	int err = -ENOMEM;
	71
86e4cb35 KM	72	if (!pdata) {
	73	WARN_ON(1);
	74	return -ENODEV;
	75	}
7a7a4a59 HM	76
	77	if (usb_disabled())
	78	return -ENODEV;
	79
	80	irq = platform_get_irq(dev, 0);
	81	if (irq < 0) {
2350cb0c	82	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	83	return irq;
	84	}
	85	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	86	if (!res_mem) {
5c9b2b28	87	dev_err(&dev->dev, "no memory resource provided");
7a7a4a59 HM	88	return -ENXIO;
	89	}
	90
04216bed KM	91	if (pdata->power_on) {
	92	err = pdata->power_on(dev);
	93	if (err < 0)
	94	return err;
	95	}
	96
7a7a4a59 HM	97	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
7a7a4a59 HM	98	dev_name(&dev->dev));
04216bed KM	99	if (!hcd) {
	100	err = -ENOMEM;
	101	goto err_power;
	102	}
7a7a4a59 HM	103
	104	hcd->rsrc_start = res_mem->start;
	105	hcd->rsrc_len = resource_size(res_mem);
	106
61ff2745	107	hcd->regs = devm_request_and_ioremap(&dev->dev, res_mem);
ec03ad85 JL	108	if (!hcd->regs) {
ec03ad85 JL	109	err = -ENOMEM;
61ff2745	110	goto err_put_hcd;
ec03ad85	111	}
7a7a4a59 HM	112	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	113	if (err)
61ff2745	114	goto err_put_hcd;
7a7a4a59 HM	115
	116	platform_set_drvdata(dev, hcd);
	117
	118	return err;
	119
7a7a4a59 HM	120	err_put_hcd:
7a7a4a59 HM	121	usb_put_hcd(hcd);
04216bed KM	122	err_power:
	123	if (pdata->power_off)
	124	pdata->power_off(dev);
	125
7a7a4a59 HM	126	return err;
	127	}
	128
fb4e98ab	129	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	130	{
7a7a4a59 HM	131	struct usb_hcd *hcd = platform_get_drvdata(dev);
04216bed	132	struct usb_ehci_pdata *pdata = dev->dev.platform_data;
7a7a4a59 HM	133
7a7a4a59 HM	134	usb_remove_hcd(hcd);
7a7a4a59 HM	135	usb_put_hcd(hcd);
	136	platform_set_drvdata(dev, NULL);
	137
04216bed KM	138	if (pdata->power_off)
	139	pdata->power_off(dev);
	140
7a7a4a59 HM	141	return 0;
	142	}
	143
	144	#ifdef CONFIG_PM
	145
	146	static int ehci_platform_suspend(struct device *dev)
	147	{
	148	struct usb_hcd *hcd = dev_get_drvdata(dev);
04216bed KM	149	struct usb_ehci_pdata *pdata = dev->platform_data;
	150	struct platform_device *pdev =
	151	container_of(dev, struct platform_device, dev);
c5cf9212	152	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	153	int ret;
	154
	155	ret = ehci_suspend(hcd, do_wakeup);
7a7a4a59	156
04216bed KM	157	if (pdata->power_suspend)
	158	pdata->power_suspend(pdev);
	159
	160	return ret;
7a7a4a59 HM	161	}
	162
	163	static int ehci_platform_resume(struct device *dev)
	164	{
	165	struct usb_hcd *hcd = dev_get_drvdata(dev);
04216bed KM	166	struct usb_ehci_pdata *pdata = dev->platform_data;
	167	struct platform_device *pdev =
	168	container_of(dev, struct platform_device, dev);
	169
	170	if (pdata->power_on) {
	171	int err = pdata->power_on(pdev);
	172	if (err < 0)
	173	return err;
	174	}
7a7a4a59	175
c5cf9212	176	ehci_resume(hcd, false);
7a7a4a59 HM	177	return 0;
	178	}
	179
	180	#else /* !CONFIG_PM */
	181	#define ehci_platform_suspend NULL
	182	#define ehci_platform_resume NULL
	183	#endif /* CONFIG_PM */
	184
	185	static const struct platform_device_id ehci_platform_table[] = {
	186	{ "ehci-platform", 0 },
	187	{ }
	188	};
	189	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	190
	191	static const struct dev_pm_ops ehci_platform_pm_ops = {
	192	.suspend = ehci_platform_suspend,
	193	.resume = ehci_platform_resume,
	194	};
	195
	196	static struct platform_driver ehci_platform_driver = {
	197	.id_table = ehci_platform_table,
	198	.probe = ehci_platform_probe,
7690417d	199	.remove = ehci_platform_remove,
7a7a4a59 HM	200	.shutdown = usb_hcd_platform_shutdown,
	201	.driver = {
	202	.owner = THIS_MODULE,
	203	.name = "ehci-platform",
	204	.pm = &ehci_platform_pm_ops,
	205	}
	206	};
99f91934 AS	207
	208	static int __init ehci_platform_init(void)
	209	{
	210	if (usb_disabled())
	211	return -ENODEV;
	212
	213	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	214
	215	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	216	return platform_driver_register(&ehci_platform_driver);
	217	}
	218	module_init(ehci_platform_init);
	219
	220	static void __exit ehci_platform_cleanup(void)
	221	{
	222	platform_driver_unregister(&ehci_platform_driver);
	223	}
	224	module_exit(ehci_platform_cleanup);
	225
	226	MODULE_DESCRIPTION(DRIVER_DESC);
	227	MODULE_AUTHOR("Hauke Mehrtens");
	228	MODULE_AUTHOR("Alan Stern");
	229	MODULE_LICENSE("GPL");