[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/err.h>
#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_ioremap_resource(&dev->dev, res_mem);
	if (IS_ERR(hcd->regs)) {
		err = PTR_ERR(hcd->regs);
		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	*/
148e1134	21	#include <linux/err.h>
99f91934	22	#include <linux/kernel.h>
d1bb67a7 AS	23	#include <linux/hrtimer.h>
d1bb67a7 AS	24	#include <linux/io.h>
99f91934	25	#include <linux/module.h>
7a7a4a59	26	#include <linux/platform_device.h>
99f91934 AS	27	#include <linux/usb.h>
99f91934 AS	28	#include <linux/usb/hcd.h>
7a7a4a59 HM	29	#include <linux/usb/ehci_pdriver.h>
7a7a4a59 HM	30
99f91934 AS	31	#include "ehci.h"
	32
	33	#define DRIVER_DESC "EHCI generic platform driver"
	34
	35	static const char hcd_name[] = "ehci-platform";
	36
7a7a4a59 HM	37	static int ehci_platform_reset(struct usb_hcd *hcd)
	38	{
	39	struct platform_device *pdev = to_platform_device(hcd->self.controller);
	40	struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
	41	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	42	int retval;
	43
	44	hcd->has_tt = pdata->has_tt;
	45	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
	46	ehci->big_endian_desc = pdata->big_endian_desc;
	47	ehci->big_endian_mmio = pdata->big_endian_mmio;
	48
	49	ehci->caps = hcd->regs + pdata->caps_offset;
	50	retval = ehci_setup(hcd);
	51	if (retval)
	52	return retval;
	53
4534874a FF	54	if (pdata->no_io_watchdog)
4534874a FF	55	ehci->need_io_watchdog = 0;
7a7a4a59 HM	56	return 0;
	57	}
	58
99f91934	59	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	60
1b36810e	61	static const struct ehci_driver_overrides platform_overrides __initdata = {
99f91934	62	.reset = ehci_platform_reset,
7a7a4a59 HM	63	};
7a7a4a59 HM	64
41ac7b3a	65	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	66	{
	67	struct usb_hcd *hcd;
	68	struct resource *res_mem;
86e4cb35	69	struct usb_ehci_pdata *pdata = dev->dev.platform_data;
7a7a4a59 HM	70	int irq;
	71	int err = -ENOMEM;
	72
86e4cb35 KM	73	if (!pdata) {
	74	WARN_ON(1);
	75	return -ENODEV;
	76	}
7a7a4a59 HM	77
	78	if (usb_disabled())
	79	return -ENODEV;
	80
	81	irq = platform_get_irq(dev, 0);
	82	if (irq < 0) {
2350cb0c	83	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	84	return irq;
	85	}
	86	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	87	if (!res_mem) {
5c9b2b28	88	dev_err(&dev->dev, "no memory resource provided");
7a7a4a59 HM	89	return -ENXIO;
	90	}
	91
04216bed KM	92	if (pdata->power_on) {
	93	err = pdata->power_on(dev);
	94	if (err < 0)
	95	return err;
	96	}
	97
7a7a4a59 HM	98	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
7a7a4a59 HM	99	dev_name(&dev->dev));
04216bed KM	100	if (!hcd) {
	101	err = -ENOMEM;
	102	goto err_power;
	103	}
7a7a4a59 HM	104
	105	hcd->rsrc_start = res_mem->start;
	106	hcd->rsrc_len = resource_size(res_mem);
	107
148e1134 TR	108	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	109	if (IS_ERR(hcd->regs)) {
	110	err = PTR_ERR(hcd->regs);
61ff2745	111	goto err_put_hcd;
ec03ad85	112	}
7a7a4a59 HM	113	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	114	if (err)
61ff2745	115	goto err_put_hcd;
7a7a4a59 HM	116
	117	platform_set_drvdata(dev, hcd);
	118
	119	return err;
	120
7a7a4a59 HM	121	err_put_hcd:
7a7a4a59 HM	122	usb_put_hcd(hcd);
04216bed KM	123	err_power:
	124	if (pdata->power_off)
	125	pdata->power_off(dev);
	126
7a7a4a59 HM	127	return err;
	128	}
	129
fb4e98ab	130	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	131	{
7a7a4a59 HM	132	struct usb_hcd *hcd = platform_get_drvdata(dev);
04216bed	133	struct usb_ehci_pdata *pdata = dev->dev.platform_data;
7a7a4a59 HM	134
7a7a4a59 HM	135	usb_remove_hcd(hcd);
7a7a4a59 HM	136	usb_put_hcd(hcd);
	137	platform_set_drvdata(dev, NULL);
	138
04216bed KM	139	if (pdata->power_off)
	140	pdata->power_off(dev);
	141
7a7a4a59 HM	142	return 0;
	143	}
	144
	145	#ifdef CONFIG_PM
	146
	147	static int ehci_platform_suspend(struct device *dev)
	148	{
	149	struct usb_hcd *hcd = dev_get_drvdata(dev);
04216bed KM	150	struct usb_ehci_pdata *pdata = dev->platform_data;
	151	struct platform_device *pdev =
	152	container_of(dev, struct platform_device, dev);
c5cf9212	153	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	154	int ret;
	155
	156	ret = ehci_suspend(hcd, do_wakeup);
7a7a4a59	157
04216bed KM	158	if (pdata->power_suspend)
	159	pdata->power_suspend(pdev);
	160
	161	return ret;
7a7a4a59 HM	162	}
	163
	164	static int ehci_platform_resume(struct device *dev)
	165	{
	166	struct usb_hcd *hcd = dev_get_drvdata(dev);
04216bed KM	167	struct usb_ehci_pdata *pdata = dev->platform_data;
	168	struct platform_device *pdev =
	169	container_of(dev, struct platform_device, dev);
	170
	171	if (pdata->power_on) {
	172	int err = pdata->power_on(pdev);
	173	if (err < 0)
	174	return err;
	175	}
7a7a4a59	176
c5cf9212	177	ehci_resume(hcd, false);
7a7a4a59 HM	178	return 0;
	179	}
	180
	181	#else /* !CONFIG_PM */
	182	#define ehci_platform_suspend NULL
	183	#define ehci_platform_resume NULL
	184	#endif /* CONFIG_PM */
	185
	186	static const struct platform_device_id ehci_platform_table[] = {
	187	{ "ehci-platform", 0 },
	188	{ }
	189	};
	190	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	191
	192	static const struct dev_pm_ops ehci_platform_pm_ops = {
	193	.suspend = ehci_platform_suspend,
	194	.resume = ehci_platform_resume,
	195	};
	196
	197	static struct platform_driver ehci_platform_driver = {
	198	.id_table = ehci_platform_table,
	199	.probe = ehci_platform_probe,
7690417d	200	.remove = ehci_platform_remove,
7a7a4a59 HM	201	.shutdown = usb_hcd_platform_shutdown,
	202	.driver = {
	203	.owner = THIS_MODULE,
	204	.name = "ehci-platform",
	205	.pm = &ehci_platform_pm_ops,
	206	}
	207	};
99f91934 AS	208
	209	static int __init ehci_platform_init(void)
	210	{
	211	if (usb_disabled())
	212	return -ENODEV;
	213
	214	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	215
	216	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	217	return platform_driver_register(&ehci_platform_driver);
	218	}
	219	module_init(ehci_platform_init);
	220
	221	static void __exit ehci_platform_cleanup(void)
	222	{
	223	platform_driver_unregister(&ehci_platform_driver);
	224	}
	225	module_exit(ehci_platform_cleanup);
	226
	227	MODULE_DESCRIPTION(DRIVER_DESC);
	228	MODULE_AUTHOR("Hauke Mehrtens");
	229	MODULE_AUTHOR("Alan Stern");
	230	MODULE_LICENSE("GPL");