summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/ehci-ath79.c
blob: 98cc8a13169c9aab288803ecba0d88062a04e727 (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
197
198
199
200
201
202
/*
 *  Bus Glue for Atheros AR7XXX/AR9XXX built-in EHCI controller.
 *
 *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
 *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
 *
 *  Parts of this file are based on Atheros' 2.6.15 BSP
 *	Copyright (C) 2007 Atheros Communications, Inc.
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License version 2 as published
 *  by the Free Software Foundation.
 */

#include <linux/platform_device.h>

enum {
	EHCI_ATH79_IP_V1 = 0,
	EHCI_ATH79_IP_V2,
};

static const struct platform_device_id ehci_ath79_id_table[] = {
	{
		.name		= "ar71xx-ehci",
		.driver_data	= EHCI_ATH79_IP_V1,
	},
	{
		.name		= "ar724x-ehci",
		.driver_data	= EHCI_ATH79_IP_V2,
	},
	{
		.name		= "ar913x-ehci",
		.driver_data	= EHCI_ATH79_IP_V2,
	},
	{
		/* terminating entry */
	},
};

MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table);

static int ehci_ath79_init(struct usb_hcd *hcd)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	struct platform_device *pdev = to_platform_device(hcd->self.controller);
	const struct platform_device_id *id;
	int hclength;
	int ret;

	id = platform_get_device_id(pdev);
	if (!id) {
		dev_err(hcd->self.controller, "missing device id\n");
		return -EINVAL;
	}

	hclength = HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
	switch (id->driver_data) {
	case EHCI_ATH79_IP_V1:
		ehci->has_synopsys_hc_bug = 1;

		ehci->caps = hcd->regs;
		ehci->regs = hcd->regs + hclength;
		break;

	case EHCI_ATH79_IP_V2:
		hcd->has_tt = 1;

		ehci->caps = hcd->regs + 0x100;
		ehci->regs = hcd->regs + 0x100 + hclength;
		break;

	default:
		BUG();
	}

	dbg_hcs_params(ehci, "reset");
	dbg_hcc_params(ehci, "reset");
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	ehci->sbrn = 0x20;

	ehci_reset(ehci);

	ret = ehci_init(hcd);
	if (ret)
		return ret;

	ehci_port_power(ehci, 0);

	return 0;
}

static const struct hc_driver ehci_ath79_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "Atheros built-in EHCI controller",
	.hcd_priv_size		= sizeof(struct ehci_hcd),
	.irq			= ehci_irq,
	.flags			= HCD_MEMORY | HCD_USB2,

	.reset			= ehci_ath79_init,
	.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,

	.relinquish_port	= ehci_relinquish_port,
	.port_handed_over	= ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};

static int ehci_ath79_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd;
	struct resource *res;
	int irq;
	int ret;

	if (usb_disabled())
		return -ENODEV;

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
		dev_dbg(&pdev->dev, "no IRQ specified\n");
		return -ENODEV;
	}
	irq = res->start;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_dbg(&pdev->dev, "no base address specified\n");
		return -ENODEV;
	}

	hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev,
			     dev_name(&pdev->dev));
	if (!hcd)
		return -ENOMEM;

	hcd->rsrc_start	= res->start;
	hcd->rsrc_len	= res->end - res->start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		dev_dbg(&pdev->dev, "controller already in use\n");
		ret = -EBUSY;
		goto err_put_hcd;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_dbg(&pdev->dev, "error mapping memory\n");
		ret = -EFAULT;
		goto err_release_region;
	}

	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
	if (ret)
		goto err_iounmap;

	return 0;

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 ret;
}

static int ehci_ath79_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;
}

static struct platform_driver ehci_ath79_driver = {
	.probe		= ehci_ath79_probe,
	.remove		= ehci_ath79_remove,
	.id_table	= ehci_ath79_id_table,
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "ath79-ehci",
	}
};

MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci");