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

/*
 * Generic platform ohci driver
 *
 * Copyright 2007 Michael Buesch <m@bues.ch>
 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
 * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
 *
 * Derived from the OCHI-SSB driver
 * 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/clk.h>
#include <linux/dma-mapping.h>
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/usb/ohci_pdriver.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>

#include "ohci.h"

#define DRIVER_DESC "OHCI generic platform driver"
#define OHCI_MAX_CLKS 3
#define OHCI_MAX_RESETS 2
#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)

struct ohci_platform_priv {
	struct clk *clks[OHCI_MAX_CLKS];
	struct reset_control *resets[OHCI_MAX_RESETS];
	struct phy **phys;
	int num_phys;
};

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

static int ohci_platform_power_on(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
	int clk, ret, phy_num;

	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
		ret = clk_prepare_enable(priv->clks[clk]);
		if (ret)
			goto err_disable_clks;
	}

	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
		ret = phy_init(priv->phys[phy_num]);
		if (ret)
			goto err_exit_phy;
		ret = phy_power_on(priv->phys[phy_num]);
		if (ret) {
			phy_exit(priv->phys[phy_num]);
			goto err_exit_phy;
		}
	}

	return 0;

err_exit_phy:
	while (--phy_num >= 0) {
		phy_power_off(priv->phys[phy_num]);
		phy_exit(priv->phys[phy_num]);
	}
err_disable_clks:
	while (--clk >= 0)
		clk_disable_unprepare(priv->clks[clk]);

	return ret;
}

static void ohci_platform_power_off(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
	int clk, phy_num;

	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
		phy_power_off(priv->phys[phy_num]);
		phy_exit(priv->phys[phy_num]);
	}

	for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
		if (priv->clks[clk])
			clk_disable_unprepare(priv->clks[clk]);
}

static struct hc_driver __read_mostly ohci_platform_hc_driver;

static const struct ohci_driver_overrides platform_overrides __initconst = {
	.product_desc =		"Generic Platform OHCI controller",
	.extra_priv_size =	sizeof(struct ohci_platform_priv),
};

static struct usb_ohci_pdata ohci_platform_defaults = {
	.power_on =		ohci_platform_power_on,
	.power_suspend =	ohci_platform_power_off,
	.power_off =		ohci_platform_power_off,
};

static int ohci_platform_probe(struct platform_device *dev)
{
	struct usb_hcd *hcd;
	struct resource *res_mem;
	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
	struct ohci_platform_priv *priv;
	struct ohci_hcd *ohci;
	int err, irq, phy_num, clk = 0, rst = 0;

	if (usb_disabled())
		return -ENODEV;

	/*
	 * Use reasonable defaults so platforms don't have to provide these
	 * with DT probing on ARM.
	 */
	if (!pdata)
		pdata = &ohci_platform_defaults;

	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
	if (err)
		return err;

	irq = platform_get_irq(dev, 0);
	if (irq < 0) {
		dev_err(&dev->dev, "no irq provided");
		return irq;
	}

	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
			dev_name(&dev->dev));
	if (!hcd)
		return -ENOMEM;

	platform_set_drvdata(dev, hcd);
	dev->dev.platform_data = pdata;
	priv = hcd_to_ohci_priv(hcd);
	ohci = hcd_to_ohci(hcd);

	if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
		if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
			ohci->flags |= OHCI_QUIRK_BE_MMIO;

		if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
			ohci->flags |= OHCI_QUIRK_BE_DESC;

		if (of_property_read_bool(dev->dev.of_node, "big-endian"))
			ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;

		if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
			ohci->flags |= OHCI_QUIRK_FRAME_NO;

		of_property_read_u32(dev->dev.of_node, "num-ports",
				     &ohci->num_ports);

		priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
				"phys", "#phy-cells");

		if (priv->num_phys > 0) {
			priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
					    sizeof(struct phy *), GFP_KERNEL);
			if (!priv->phys)
				return -ENOMEM;
		} else
			priv->num_phys = 0;

		for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
			priv->phys[phy_num] = devm_of_phy_get_by_index(
					&dev->dev, dev->dev.of_node, phy_num);
			if (IS_ERR(priv->phys[phy_num])) {
				err = PTR_ERR(priv->phys[phy_num]);
				goto err_put_hcd;
			}
		}

		for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
			priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
			if (IS_ERR(priv->clks[clk])) {
				err = PTR_ERR(priv->clks[clk]);
				if (err == -EPROBE_DEFER)
					goto err_put_clks;
				priv->clks[clk] = NULL;
				break;
			}
		}
		for (rst = 0; rst < OHCI_MAX_RESETS; rst++) {
			priv->resets[rst] =
				devm_reset_control_get_shared_by_index(
								&dev->dev, rst);
			if (IS_ERR(priv->resets[rst])) {
				err = PTR_ERR(priv->resets[rst]);
				if (err == -EPROBE_DEFER)
					goto err_reset;
				priv->resets[rst] = NULL;
				break;
			}
			err = reset_control_deassert(priv->resets[rst]);
			if (err)
				goto err_reset;
		}
	}

	if (pdata->big_endian_desc)
		ohci->flags |= OHCI_QUIRK_BE_DESC;
	if (pdata->big_endian_mmio)
		ohci->flags |= OHCI_QUIRK_BE_MMIO;
	if (pdata->no_big_frame_no)
		ohci->flags |= OHCI_QUIRK_FRAME_NO;
	if (pdata->num_ports)
		ohci->num_ports = pdata->num_ports;

#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
		dev_err(&dev->dev,
			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
		err = -EINVAL;
		goto err_reset;
	}
#endif
#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
	if (ohci->flags & OHCI_QUIRK_BE_DESC) {
		dev_err(&dev->dev,
			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
		err = -EINVAL;
		goto err_reset;
	}
#endif

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

	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	if (IS_ERR(hcd->regs)) {
		err = PTR_ERR(hcd->regs);
		goto err_power;
	}
	hcd->rsrc_start = res_mem->start;
	hcd->rsrc_len = resource_size(res_mem);

	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err)
		goto err_power;

	device_wakeup_enable(hcd->self.controller);

	platform_set_drvdata(dev, hcd);

	return err;

err_power:
	if (pdata->power_off)
		pdata->power_off(dev);
err_reset:
	while (--rst >= 0)
		reset_control_assert(priv->resets[rst]);
err_put_clks:
	while (--clk >= 0)
		clk_put(priv->clks[clk]);
err_put_hcd:
	if (pdata == &ohci_platform_defaults)
		dev->dev.platform_data = NULL;

	usb_put_hcd(hcd);

	return err;
}

static int ohci_platform_remove(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
	int clk, rst;

	usb_remove_hcd(hcd);

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

	for (rst = 0; rst < OHCI_MAX_RESETS && priv->resets[rst]; rst++)
		reset_control_assert(priv->resets[rst]);

	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
		clk_put(priv->clks[clk]);

	usb_put_hcd(hcd);

	if (pdata == &ohci_platform_defaults)
		dev->dev.platform_data = NULL;

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int ohci_platform_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ohci_pdata *pdata = dev->platform_data;
	struct platform_device *pdev = to_platform_device(dev);
	bool do_wakeup = device_may_wakeup(dev);
	int ret;

	ret = ohci_suspend(hcd, do_wakeup);
	if (ret)
		return ret;

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

	return ret;
}

static int ohci_platform_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
	struct platform_device *pdev = to_platform_device(dev);

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

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

static const struct of_device_id ohci_platform_ids[] = {
	{ .compatible = "generic-ohci", },
	{ .compatible = "cavium,octeon-6335-ohci", },
	{ }
};
MODULE_DEVICE_TABLE(of, ohci_platform_ids);

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

static SIMPLE_DEV_PM_OPS(ohci_platform_pm_ops, ohci_platform_suspend,
	ohci_platform_resume);

static struct platform_driver ohci_platform_driver = {
	.id_table	= ohci_platform_table,
	.probe		= ohci_platform_probe,
	.remove		= ohci_platform_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.name	= "ohci-platform",
		.pm	= &ohci_platform_pm_ops,
		.of_match_table = ohci_platform_ids,
	}
};

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

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

	ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
	return platform_driver_register(&ohci_platform_driver);
}
module_init(ohci_platform_init);

static void __exit ohci_platform_cleanup(void)
{
	platform_driver_unregister(&ohci_platform_driver);
}
module_exit(ohci_platform_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_AUTHOR("Alan Stern");
MODULE_LICENSE("GPL");
Commit	Line	Data
fa3364b5 HM	1	/*
	2	* Generic platform ohci driver
	3	*
	4	* Copyright 2007 Michael Buesch <m@bues.ch>
	5	* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
ca52a17b	6	* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
fa3364b5 HM	7	*
	8	* Derived from the OCHI-SSB driver
	9	* Derived from the OHCI-PCI driver
	10	* Copyright 1999 Roman Weissgaerber
	11	* Copyright 2000-2002 David Brownell
	12	* Copyright 1999 Linus Torvalds
	13	* Copyright 1999 Gregory P. Smith
	14	*
	15	* Licensed under the GNU/GPL. See COPYING for details.
	16	*/
928fb68e	17
ca52a17b HG	18	#include <linux/clk.h>
ca52a17b HG	19	#include <linux/dma-mapping.h>
928fb68e MG	20	#include <linux/hrtimer.h>
	21	#include <linux/io.h>
	22	#include <linux/kernel.h>
	23	#include <linux/module.h>
148e1134	24	#include <linux/err.h>
ca52a17b	25	#include <linux/phy/phy.h>
fa3364b5	26	#include <linux/platform_device.h>
4615f3bd	27	#include <linux/reset.h>
fa3364b5	28	#include <linux/usb/ohci_pdriver.h>
928fb68e MG	29	#include <linux/usb.h>
	30	#include <linux/usb/hcd.h>
	31
	32	#include "ohci.h"
	33
	34	#define DRIVER_DESC "OHCI generic platform driver"
ca52a17b	35	#define OHCI_MAX_CLKS 3
62d9694a	36	#define OHCI_MAX_RESETS 2
ca52a17b HG	37	#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
	38
	39	struct ohci_platform_priv {
	40	struct clk *clks[OHCI_MAX_CLKS];
62d9694a	41	struct reset_control *resets[OHCI_MAX_RESETS];
85cd690d AR	42	struct phy **phys;
85cd690d AR	43	int num_phys;
ca52a17b	44	};
928fb68e MG	45
928fb68e MG	46	static const char hcd_name[] = "ohci-platform";
fa3364b5	47
ca52a17b HG	48	static int ohci_platform_power_on(struct platform_device *dev)
	49	{
	50	struct usb_hcd *hcd = platform_get_drvdata(dev);
	51	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
85cd690d	52	int clk, ret, phy_num;
ca52a17b HG	53
	54	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
	55	ret = clk_prepare_enable(priv->clks[clk]);
	56	if (ret)
	57	goto err_disable_clks;
	58	}
	59
85cd690d	60	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
a666f7d0 AR	61	ret = phy_init(priv->phys[phy_num]);
	62	if (ret)
	63	goto err_exit_phy;
	64	ret = phy_power_on(priv->phys[phy_num]);
	65	if (ret) {
	66	phy_exit(priv->phys[phy_num]);
	67	goto err_exit_phy;
85cd690d	68	}
ca52a17b HG	69	}
	70
	71	return 0;
	72
	73	err_exit_phy:
85cd690d	74	while (--phy_num >= 0) {
a666f7d0 AR	75	phy_power_off(priv->phys[phy_num]);
a666f7d0 AR	76	phy_exit(priv->phys[phy_num]);
85cd690d	77	}
ca52a17b HG	78	err_disable_clks:
	79	while (--clk >= 0)
	80	clk_disable_unprepare(priv->clks[clk]);
	81
	82	return ret;
	83	}
	84
	85	static void ohci_platform_power_off(struct platform_device *dev)
	86	{
	87	struct usb_hcd *hcd = platform_get_drvdata(dev);
	88	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
85cd690d	89	int clk, phy_num;
ca52a17b	90
85cd690d	91	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
a666f7d0 AR	92	phy_power_off(priv->phys[phy_num]);
a666f7d0 AR	93	phy_exit(priv->phys[phy_num]);
ca52a17b HG	94	}
	95
	96	for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
	97	if (priv->clks[clk])
	98	clk_disable_unprepare(priv->clks[clk]);
	99	}
	100
928fb68e	101	static struct hc_driver __read_mostly ohci_platform_hc_driver;
fa3364b5	102
928fb68e	103	static const struct ohci_driver_overrides platform_overrides __initconst = {
ca52a17b	104	.product_desc = "Generic Platform OHCI controller",
ca52a17b HG	105	.extra_priv_size = sizeof(struct ohci_platform_priv),
	106	};
	107
	108	static struct usb_ohci_pdata ohci_platform_defaults = {
	109	.power_on = ohci_platform_power_on,
	110	.power_suspend = ohci_platform_power_off,
	111	.power_off = ohci_platform_power_off,
fa3364b5 HM	112	};
fa3364b5 HM	113
41ac7b3a	114	static int ohci_platform_probe(struct platform_device *dev)
fa3364b5 HM	115	{
	116	struct usb_hcd *hcd;
	117	struct resource *res_mem;
d4f09e28	118	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
ca52a17b	119	struct ohci_platform_priv *priv;
b1034412	120	struct ohci_hcd *ohci;
62d9694a	121	int err, irq, phy_num, clk = 0, rst = 0;
fa3364b5 HM	122
	123	if (usb_disabled())
	124	return -ENODEV;
	125
ca52a17b HG	126	/*
	127	* Use reasonable defaults so platforms don't have to provide these
	128	* with DT probing on ARM.
	129	*/
	130	if (!pdata)
	131	pdata = &ohci_platform_defaults;
	132
	133	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
	134	if (err)
	135	return err;
	136
fa3364b5 HM	137	irq = platform_get_irq(dev, 0);
fa3364b5 HM	138	if (irq < 0) {
976baf6e	139	dev_err(&dev->dev, "no irq provided");
fa3364b5 HM	140	return irq;
	141	}
	142
ca52a17b HG	143	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
	144	dev_name(&dev->dev));
	145	if (!hcd)
	146	return -ENOMEM;
	147
	148	platform_set_drvdata(dev, hcd);
	149	dev->dev.platform_data = pdata;
	150	priv = hcd_to_ohci_priv(hcd);
b1034412	151	ohci = hcd_to_ohci(hcd);
ca52a17b HG	152
ca52a17b HG	153	if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
b1034412 HG	154	if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
	155	ohci->flags \|= OHCI_QUIRK_BE_MMIO;
	156
	157	if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
	158	ohci->flags \|= OHCI_QUIRK_BE_DESC;
	159
	160	if (of_property_read_bool(dev->dev.of_node, "big-endian"))
	161	ohci->flags \|= OHCI_QUIRK_BE_MMIO \| OHCI_QUIRK_BE_DESC;
	162
c4b8692a KC	163	if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
	164	ohci->flags \|= OHCI_QUIRK_FRAME_NO;
	165
	166	of_property_read_u32(dev->dev.of_node, "num-ports",
	167	&ohci->num_ports);
	168
85cd690d AR	169	priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
85cd690d AR	170	"phys", "#phy-cells");
85cd690d	171
a666f7d0 AR	172	if (priv->num_phys > 0) {
	173	priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
	174	sizeof(struct phy *), GFP_KERNEL);
	175	if (!priv->phys)
	176	return -ENOMEM;
	177	} else
	178	priv->num_phys = 0;
85cd690d AR	179
85cd690d AR	180	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
a666f7d0 AR	181	priv->phys[phy_num] = devm_of_phy_get_by_index(
	182	&dev->dev, dev->dev.of_node, phy_num);
	183	if (IS_ERR(priv->phys[phy_num])) {
	184	err = PTR_ERR(priv->phys[phy_num]);
	185	goto err_put_hcd;
	186	}
ca52a17b HG	187	}
	188
	189	for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
	190	priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
	191	if (IS_ERR(priv->clks[clk])) {
	192	err = PTR_ERR(priv->clks[clk]);
	193	if (err == -EPROBE_DEFER)
	194	goto err_put_clks;
	195	priv->clks[clk] = NULL;
	196	break;
	197	}
	198	}
62d9694a HG	199	for (rst = 0; rst < OHCI_MAX_RESETS; rst++) {
	200	priv->resets[rst] =
	201	devm_reset_control_get_shared_by_index(
	202	&dev->dev, rst);
	203	if (IS_ERR(priv->resets[rst])) {
	204	err = PTR_ERR(priv->resets[rst]);
	205	if (err == -EPROBE_DEFER)
	206	goto err_reset;
	207	priv->resets[rst] = NULL;
	208	break;
	209	}
	210	err = reset_control_deassert(priv->resets[rst]);
	211	if (err)
	212	goto err_reset;
	213	}
ca52a17b HG	214	}
ca52a17b HG	215
adff5295 AS	216	if (pdata->big_endian_desc)
	217	ohci->flags \|= OHCI_QUIRK_BE_DESC;
	218	if (pdata->big_endian_mmio)
	219	ohci->flags \|= OHCI_QUIRK_BE_MMIO;
46f21949 KC	220	if (pdata->no_big_frame_no)
	221	ohci->flags \|= OHCI_QUIRK_FRAME_NO;
	222	if (pdata->num_ports)
	223	ohci->num_ports = pdata->num_ports;
adff5295 AS	224
	225	#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
	226	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
	227	dev_err(&dev->dev,
	228	"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
	229	err = -EINVAL;
4615f3bd	230	goto err_reset;
adff5295 AS	231	}
	232	#endif
	233	#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
	234	if (ohci->flags & OHCI_QUIRK_BE_DESC) {
	235	dev_err(&dev->dev,
	236	"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
	237	err = -EINVAL;
4615f3bd	238	goto err_reset;
adff5295 AS	239	}
	240	#endif
	241
e4d37aeb KM	242	if (pdata->power_on) {
	243	err = pdata->power_on(dev);
	244	if (err < 0)
4615f3bd	245	goto err_reset;
e4d37aeb	246	}
fa3364b5	247
7b519291	248	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
148e1134 TR	249	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	250	if (IS_ERR(hcd->regs)) {
	251	err = PTR_ERR(hcd->regs);
ca52a17b	252	goto err_power;
aece389e	253	}
7b519291 VB	254	hcd->rsrc_start = res_mem->start;
	255	hcd->rsrc_len = resource_size(res_mem);
	256
fa3364b5 HM	257	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
fa3364b5 HM	258	if (err)
ca52a17b	259	goto err_power;
fa3364b5	260
3c9740a1 PC	261	device_wakeup_enable(hcd->self.controller);
3c9740a1 PC	262
fa3364b5 HM	263	platform_set_drvdata(dev, hcd);
	264
	265	return err;
	266
e4d37aeb KM	267	err_power:
	268	if (pdata->power_off)
	269	pdata->power_off(dev);
4615f3bd	270	err_reset:
62d9694a HG	271	while (--rst >= 0)
62d9694a HG	272	reset_control_assert(priv->resets[rst]);
ca52a17b HG	273	err_put_clks:
	274	while (--clk >= 0)
	275	clk_put(priv->clks[clk]);
	276	err_put_hcd:
	277	if (pdata == &ohci_platform_defaults)
	278	dev->dev.platform_data = NULL;
	279
	280	usb_put_hcd(hcd);
e4d37aeb	281
fa3364b5 HM	282	return err;
	283	}
	284
fb4e98ab	285	static int ohci_platform_remove(struct platform_device *dev)
fa3364b5 HM	286	{
fa3364b5 HM	287	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	288	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
ca52a17b	289	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
62d9694a	290	int clk, rst;
fa3364b5 HM	291
fa3364b5 HM	292	usb_remove_hcd(hcd);
fa3364b5	293
e4d37aeb KM	294	if (pdata->power_off)
	295	pdata->power_off(dev);
	296
62d9694a HG	297	for (rst = 0; rst < OHCI_MAX_RESETS && priv->resets[rst]; rst++)
62d9694a HG	298	reset_control_assert(priv->resets[rst]);
4615f3bd	299
ca52a17b HG	300	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
	301	clk_put(priv->clks[clk]);
	302
	303	usb_put_hcd(hcd);
	304
	305	if (pdata == &ohci_platform_defaults)
	306	dev->dev.platform_data = NULL;
	307
fa3364b5 HM	308	return 0;
	309	}
	310
5e4ccd9e	311	#ifdef CONFIG_PM_SLEEP
fa3364b5 HM	312	static int ohci_platform_suspend(struct device *dev)
fa3364b5 HM	313	{
39dbd7df MG	314	struct usb_hcd *hcd = dev_get_drvdata(dev);
39dbd7df MG	315	struct usb_ohci_pdata *pdata = dev->platform_data;
20db5513	316	struct platform_device *pdev = to_platform_device(dev);
39dbd7df MG	317	bool do_wakeup = device_may_wakeup(dev);
	318	int ret;
	319
	320	ret = ohci_suspend(hcd, do_wakeup);
	321	if (ret)
	322	return ret;
e4d37aeb KM	323
	324	if (pdata->power_suspend)
	325	pdata->power_suspend(pdev);
	326
39dbd7df	327	return ret;
fa3364b5 HM	328	}
	329
	330	static int ohci_platform_resume(struct device *dev)
	331	{
	332	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	333	struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
20db5513	334	struct platform_device *pdev = to_platform_device(dev);
e4d37aeb KM	335
	336	if (pdata->power_on) {
	337	int err = pdata->power_on(pdev);
	338	if (err < 0)
	339	return err;
	340	}
fa3364b5	341
cfa49b4b	342	ohci_resume(hcd, false);
fa3364b5 HM	343	return 0;
fa3364b5 HM	344	}
5e4ccd9e	345	#endif /* CONFIG_PM_SLEEP */
fa3364b5	346
ca52a17b	347	static const struct of_device_id ohci_platform_ids[] = {
ce149c30	348	{ .compatible = "generic-ohci", },
a95cfa6b	349	{ .compatible = "cavium,octeon-6335-ohci", },
ca52a17b HG	350	{ }
	351	};
	352	MODULE_DEVICE_TABLE(of, ohci_platform_ids);
	353
fa3364b5 HM	354	static const struct platform_device_id ohci_platform_table[] = {
	355	{ "ohci-platform", 0 },
	356	{ }
	357	};
	358	MODULE_DEVICE_TABLE(platform, ohci_platform_table);
	359
5e4ccd9e WK	360	static SIMPLE_DEV_PM_OPS(ohci_platform_pm_ops, ohci_platform_suspend,
5e4ccd9e WK	361	ohci_platform_resume);
fa3364b5 HM	362
	363	static struct platform_driver ohci_platform_driver = {
	364	.id_table = ohci_platform_table,
	365	.probe = ohci_platform_probe,
7690417d	366	.remove = ohci_platform_remove,
fa3364b5 HM	367	.shutdown = usb_hcd_platform_shutdown,
fa3364b5 HM	368	.driver = {
fa3364b5 HM	369	.name = "ohci-platform",
fa3364b5 HM	370	.pm = &ohci_platform_pm_ops,
ca52a17b	371	.of_match_table = ohci_platform_ids,
fa3364b5 HM	372	}
fa3364b5 HM	373	};
928fb68e MG	374
	375	static int __init ohci_platform_init(void)
	376	{
	377	if (usb_disabled())
	378	return -ENODEV;
	379
	380	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	381
	382	ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
	383	return platform_driver_register(&ohci_platform_driver);
	384	}
	385	module_init(ohci_platform_init);
	386
	387	static void __exit ohci_platform_cleanup(void)
	388	{
	389	platform_driver_unregister(&ohci_platform_driver);
	390	}
	391	module_exit(ohci_platform_cleanup);
	392
	393	MODULE_DESCRIPTION(DRIVER_DESC);
	394	MODULE_AUTHOR("Hauke Mehrtens");
	395	MODULE_AUTHOR("Alan Stern");
	396	MODULE_LICENSE("GPL");