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
|
/*
* EHCI HCD (Host Controller Driver) for USB.
*
* Copyright (C) 2007 Atheros Communications, Inc.
* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* Bus Glue for Atheros AR71xx built-in EHCI controller
*
*/
#include <linux/platform_device.h>
#include <linux/delay.h>
extern int usb_disabled(void);
static void ar71xx_start_ehci(struct platform_device *pdev)
{
}
static void ar71xx_stop_ehci(struct platform_device *pdev)
{
/*
* TODO: implement
*/
}
int usb_ehci_ar71xx_probe(const struct hc_driver *driver,
struct usb_hcd **hcd_out,
struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
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",
pdev->dev.bus_id);
return -ENODEV;
}
irq = res->start;
hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
if (!hcd)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_dbg(&pdev->dev, "no base address specified for %s\n",
pdev->dev.bus_id);
ret = -ENODEV;
goto err_put_hcd;
}
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;
}
ar71xx_start_ehci(pdev);
#if 0
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
ehci->hcs_params = readl(&ehci->caps->hcs_params);
#endif
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
if (ret)
goto err_stop_ehc;
return 0;
err_stop_ehc:
ar71xx_stop_ehci(pdev);
iounmap(hcd->regs);
err_release_region:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
/**
* usb_ehci_ar71xx_remove - shutdown processing for AR71xx-based HCDs
* @dev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_hcd_ar71xx_probe(), first invoking
* the HCD's stop() method. It is always called from a thread
* context, normally "rmmod", "apmd", or something similar.
*
*/
static void usb_ehci_ar71xx_remove(struct usb_hcd *hcd,
struct platform_device *pdev)
{
usb_remove_hcd(hcd);
ar71xx_stop_ehci(pdev);
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),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_init,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ehci_get_frame,
/*
* root hub support
*/
.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
};
static int ehci_hcd_ar71xx_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd = NULL;
int ret;
ret = -ENODEV;
if (!usb_disabled())
ret = usb_ehci_ar71xx_probe(&ehci_ar71xx_hc_driver, &hcd, pdev);
return ret;
}
static int ehci_hcd_ar71xx_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_ehci_ar71xx_remove(hcd, pdev);
return 0;
}
static struct platform_driver ehci_hcd_ar71xx_driver = {
.probe = ehci_hcd_ar71xx_drv_probe,
.remove = ehci_hcd_ar71xx_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "ar71xx-ehci",
.bus = &platform_bus_type
}
};
MODULE_ALIAS("ar71xx-ehci");
|
