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
|
/*
* Generic UHCI HCD (Host Controller Driver) for Platform Devices
*
* Copyright (c) 2011 Tony Prisk <linux@prisktech.co.nz>
*
* This file is based on uhci-grlib.c
* (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
*/
#include <linux/of.h>
#include <linux/platform_device.h>
static int uhci_platform_init(struct usb_hcd *hcd)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
uhci->rh_numports = uhci_count_ports(hcd);
/* Set up pointers to to generic functions */
uhci->reset_hc = uhci_generic_reset_hc;
uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
/* No special actions need to be taken for the functions below */
uhci->configure_hc = NULL;
uhci->resume_detect_interrupts_are_broken = NULL;
uhci->global_suspend_mode_is_broken = NULL;
/* Reset if the controller isn't already safely quiescent. */
check_and_reset_hc(uhci);
return 0;
}
static const struct hc_driver uhci_platform_hc_driver = {
.description = hcd_name,
.product_desc = "Generic UHCI Host Controller",
.hcd_priv_size = sizeof(struct uhci_hcd),
/* Generic hardware linkage */
.irq = uhci_irq,
.flags = HCD_MEMORY | HCD_USB11,
/* Basic lifecycle operations */
.reset = uhci_platform_init,
.start = uhci_start,
#ifdef CONFIG_PM
.pci_suspend = NULL,
.pci_resume = NULL,
.bus_suspend = uhci_rh_suspend,
.bus_resume = uhci_rh_resume,
#endif
.stop = uhci_stop,
.urb_enqueue = uhci_urb_enqueue,
.urb_dequeue = uhci_urb_dequeue,
.endpoint_disable = uhci_hcd_endpoint_disable,
.get_frame_number = uhci_hcd_get_frame_number,
.hub_status_data = uhci_hub_status_data,
.hub_control = uhci_hub_control,
};
static int uhci_hcd_platform_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct uhci_hcd *uhci;
struct resource *res;
int ret;
if (usb_disabled())
return -ENODEV;
/*
* Right now device-tree probed devices don't get dma_mask set.
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
if (!pdev->dev.coherent_dma_mask)
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
pdev->name);
if (!hcd)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
pr_err("%s: request_mem_region failed\n", __func__);
ret = -EBUSY;
goto err_rmr;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
pr_err("%s: ioremap failed\n", __func__);
ret = -ENOMEM;
goto err_irq;
}
uhci = hcd_to_uhci(hcd);
uhci->regs = hcd->regs;
ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED |
IRQF_SHARED);
if (ret)
goto err_uhci;
return 0;
err_uhci:
iounmap(hcd->regs);
err_irq:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_rmr:
usb_put_hcd(hcd);
return ret;
}
static int uhci_hcd_platform_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);
platform_set_drvdata(pdev, NULL);
return 0;
}
/* Make sure the controller is quiescent and that we're not using it
* any more. This is mainly for the benefit of programs which, like kexec,
* expect the hardware to be idle: not doing DMA or generating IRQs.
*
* This routine may be called in a damaged or failing kernel. Hence we
* do not acquire the spinlock before shutting down the controller.
*/
static void uhci_hcd_platform_shutdown(struct platform_device *op)
{
struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
uhci_hc_died(hcd_to_uhci(hcd));
}
static const struct of_device_id platform_uhci_ids[] = {
{ .compatible = "platform-uhci", },
{}
};
static struct platform_driver uhci_platform_driver = {
.probe = uhci_hcd_platform_probe,
.remove = uhci_hcd_platform_remove,
.shutdown = uhci_hcd_platform_shutdown,
.driver = {
.name = "platform-uhci",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(platform_uhci_ids),
},
};
|
