aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host/ehci-platform.c
blob: dfe881a34ae254294483c8ce5bff67d62d741340 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
/*
 * 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/platform_device.h>
#include <linux/usb/ehci_pdriver.h>

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->port_power_on)
		ehci_port_power(ehci, 1);
	if (pdata->port_power_off)
		ehci_port_power(ehci, 0);

	return 0;
}

static const struct hc_driver ehci_platform_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "Generic Platform EHCI Controller",
	.hcd_priv_size		= sizeof(struct ehci_hcd),

	.irq			= ehci_irq,
	.flags			= HCD_MEMORY | HCD_USB2,

	.reset			= ehci_platform_reset,
	.start			= ehci_run,
	.stop			= ehci_stop,
	.shutdown		= ehci_shutdown,

	.urb_enqueue		= ehci_urb_enqueue,
	.urb_dequeue		= ehci_urb_dequeue,
	.endpoint_disable	= ehci_endpoint_disable,
	.endpoint_reset		= ehci_endpoint_reset,

	.get_frame_number	= ehci_get_frame,

	.hub_status_data	= ehci_hub_status_data,
	.hub_control		= ehci_hub_control,
#if defined(CONFIG_PM)
	.bus_suspend		= ehci_bus_suspend,
	.bus_resume		= ehci_bus_resume,
#endif
	.relinquish_port	= ehci_relinquish_port,
	.port_handed_over	= ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};

static int __devinit ehci_platform_probe(struct platform_device *dev)
{
	struct usb_hcd *hcd;
	struct resource *res_mem;
	int irq;
	int err = -ENOMEM;

	BUG_ON(!dev->dev.platform_data);

	if (usb_disabled())
		return -ENODEV;

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

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

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

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		pr_err("controller already in use");
		err = -EBUSY;
		goto err_put_hcd;
	}

	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs)
		goto err_release_region;
	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err)
		goto err_iounmap;

	platform_set_drvdata(dev, hcd);

	return err;

err_iounmap:
	iounmap(hcd->regs);
err_release_region:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_put_hcd:
	usb_put_hcd(hcd);
	return err;
}

static int __devexit ehci_platform_remove(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	platform_set_drvdata(dev, NULL);

	return 0;
}

#ifdef CONFIG_PM

static int ehci_platform_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	bool wakeup = device_may_wakeup(dev);

	ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), wakeup);
	return 0;
}

static int ehci_platform_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);

	ehci_prepare_ports_for_controller_resume(hcd_to_ehci(hcd));
	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		= __devexit_p(ehci_platform_remove),
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "ehci-platform",
		.pm	= &ehci_platform_pm_ops,
	}
};