summaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx/files/drivers/usb/host/ehci-ar71xx.c
blob: 01433c2fbec68ead80f219ba420dfa226524c2e6 (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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
/*
 *  Bus Glue for Atheros AR71xx built-in EHCI controller.
 *
 *  Copyright (C) 2008-2010 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>
#include <linux/delay.h>

#include <asm/mach-ar71xx/platform.h>

extern int usb_disabled(void);

static int ehci_ar71xx_init(struct usb_hcd *hcd)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int ret;

	ehci->caps = hcd->regs;
	ehci->regs = hcd->regs +
			HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

	ehci->sbrn = 0x20;
	ehci->has_synopsys_hc_bug = 1;

	ehci_reset(ehci);

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

	ehci_port_power(ehci, 0);

	return 0;
}

static int ehci_ar91xx_init(struct usb_hcd *hcd)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int ret;

	ehci->caps = hcd->regs + 0x100;
	ehci->regs = hcd->regs + 0x100 +
			HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

	hcd->has_tt = 1;
	ehci->sbrn = 0x20;

	ehci_reset(ehci);

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

	ehci_port_power(ehci, 0);

	return 0;
}

static int ehci_ar71xx_probe(const struct hc_driver *driver,
			     struct usb_hcd **hcd_out,
			     struct platform_device *pdev)
{
	struct usb_hcd *hcd;
	struct resource *res;
	int irq;
	int ret;

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

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

	hcd = usb_create_hcd(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 void ehci_ar71xx_remove(struct usb_hcd *hcd,
			       struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

static const struct hc_driver ehci_ar71xx_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "Atheros AR71xx built-in EHCI controller",
	.hcd_priv_size		= sizeof(struct ehci_hcd),

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

	.reset			= ehci_ar71xx_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,
#ifdef CONFIG_PM
	.hub_suspend		= ehci_hub_suspend,
	.hub_resume		= ehci_hub_resume,
#endif
	.relinquish_port	= ehci_relinquish_port,
	.port_handed_over	= ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};

static const struct hc_driver ehci_ar91xx_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "Atheros AR91xx built-in EHCI controller",
	.hcd_priv_size		= sizeof(struct ehci_hcd),
	.irq			= ehci_irq,
	.flags			= HCD_MEMORY | HCD_USB2,

	.reset			= ehci_ar91xx_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,
#ifdef CONFIG_PM
	.hub_suspend		= ehci_hub_suspend,
	.hub_resume		= ehci_hub_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 ehci_ar71xx_driver_probe(struct platform_device *pdev)
{
	struct ar71xx_ehci_platform_data *pdata;
	struct usb_hcd *hcd = NULL;
	int ret;

	if (usb_disabled())
		return -ENODEV;

	pdata = pdev->dev.platform_data;
	if (!pdata) {
		dev_err(&pdev->dev, "no platform data specified for %s\n",
			dev_name(&pdev->dev));
		return -ENODEV;
	}

	if (pdata->is_ar91xx)
		ret = ehci_ar71xx_probe(&ehci_ar91xx_hc_driver, &hcd, pdev);
	else
		ret = ehci_ar71xx_probe(&ehci_ar71xx_hc_driver, &hcd, pdev);

	return ret;
}

static int ehci_ar71xx_driver_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	ehci_ar71xx_remove(hcd, pdev);
	return 0;
}

MODULE_ALIAS("platform:ar71xx-ehci");

static struct platform_driver ehci_ar71xx_driver = {
	.probe		= ehci_ar71xx_driver_probe,
	.remove		= ehci_ar71xx_driver_remove,
	.driver = {
		.name	= "ar71xx-ehci",
	}
};