summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/ehci-xls.c
blob: 72f08196f8cd7f08ae481a8ea3b0ff342e7cef38 (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
/*
 * EHCI HCD for Netlogic XLS processors.
 *
 * (C) Copyright 2011 Netlogic Microsystems Inc.
 *
 *  Based on various ehci-*.c drivers
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <linux/platform_device.h>

static int ehci_xls_setup(struct usb_hcd *hcd)
{
	int	retval;
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);

	ehci->caps = hcd->regs;
	ehci->regs = hcd->regs +
		HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
	dbg_hcs_params(ehci, "reset");
	dbg_hcc_params(ehci, "reset");

	/* cache this readonly data; minimize chip reads */
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

	retval = ehci_halt(ehci);
	if (retval)
		return retval;

	/* data structure init */
	retval = ehci_init(hcd);
	if (retval)
		return retval;

	ehci_reset(ehci);

	return retval;
}

int ehci_xls_probe_internal(const struct hc_driver *driver,
	struct platform_device *pdev)
{
	struct usb_hcd  *hcd;
	struct resource *res;
	int retval, irq;

	/* Get our IRQ from an earlier registered Platform Resource */
	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n",
				dev_name(&pdev->dev));
		return -ENODEV;
	}

	/* Get our Memory Handle */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n",
				dev_name(&pdev->dev));
		return -ENODEV;
	}
	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		retval = -ENOMEM;
		goto err1;
	}

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

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
				driver->description)) {
		dev_dbg(&pdev->dev, "controller already in use\n");
		retval = -EBUSY;
		goto err2;
	}
	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);

	if (hcd->regs == NULL) {
		dev_dbg(&pdev->dev, "error mapping memory\n");
		retval = -EFAULT;
		goto err3;
	}

	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (retval != 0)
		goto err4;
	return retval;

err4:
	iounmap(hcd->regs);
err3:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
	usb_put_hcd(hcd);
err1:
	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev),
			retval);
	return retval;
}

static struct hc_driver ehci_xls_hc_driver = {
	.description	= hcd_name,
	.product_desc	= "XLS EHCI Host Controller",
	.hcd_priv_size	= sizeof(struct ehci_hcd),
	.irq		= ehci_irq,
	.flags		= HCD_USB2 | HCD_MEMORY,
	.reset		= ehci_xls_setup,
	.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,
	.bus_suspend	= ehci_bus_suspend,
	.bus_resume	= ehci_bus_resume,
	.relinquish_port = ehci_relinquish_port,
	.port_handed_over = ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};

static int ehci_xls_probe(struct platform_device *pdev)
{
	if (usb_disabled())
		return -ENODEV;

	return ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev);
}

static int ehci_xls_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	return 0;
}

MODULE_ALIAS("ehci-xls");

static struct platform_driver ehci_xls_driver = {
	.probe		= ehci_xls_probe,
	.remove		= ehci_xls_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.name = "ehci-xls",
	},
};
OpenPOWER on IntegriCloud