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
|
// SPDX-License-Identifier: GPL-2.0
/*
* host.c - DesignWare USB3 DRD Controller Host Glue
*
* Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
*/
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include "core.h"
static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
int irq, char *name)
{
struct platform_device *pdev = to_platform_device(dwc->dev);
struct device_node *np = dev_of_node(&pdev->dev);
dwc->xhci_resources[1].start = irq;
dwc->xhci_resources[1].end = irq;
dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
if (!name && np)
dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
else
dwc->xhci_resources[1].name = name;
}
static int dwc3_host_get_irq(struct dwc3 *dwc)
{
struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
int irq;
irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
if (irq > 0) {
dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
goto out;
}
if (irq == -EPROBE_DEFER)
goto out;
irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
if (irq > 0) {
dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
goto out;
}
if (irq == -EPROBE_DEFER)
goto out;
irq = platform_get_irq(dwc3_pdev, 0);
if (irq > 0) {
dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
goto out;
}
if (!irq)
irq = -EINVAL;
out:
return irq;
}
int dwc3_host_init(struct dwc3 *dwc)
{
struct property_entry props[5];
struct platform_device *xhci;
int ret, irq;
int prop_idx = 0;
irq = dwc3_host_get_irq(dwc);
if (irq < 0)
return irq;
xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
if (!xhci) {
dev_err(dwc->dev, "couldn't allocate xHCI device\n");
return -ENOMEM;
}
xhci->dev.parent = dwc->dev;
dwc->xhci = xhci;
ret = platform_device_add_resources(xhci, dwc->xhci_resources,
DWC3_XHCI_RESOURCES_NUM);
if (ret) {
dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
goto err;
}
memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk");
if (dwc->usb3_lpm_capable)
props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
if (dwc->usb2_lpm_disable)
props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
/**
* WORKAROUND: dwc3 revisions <=3.00a have a limitation
* where Port Disable command doesn't work.
*
* The suggested workaround is that we avoid Port Disable
* completely.
*
* This following flag tells XHCI to do just that.
*/
if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
if (prop_idx) {
ret = device_create_managed_software_node(&xhci->dev, props, NULL);
if (ret) {
dev_err(dwc->dev, "failed to add properties to xHCI\n");
goto err;
}
}
ret = platform_device_add(xhci);
if (ret) {
dev_err(dwc->dev, "failed to register xHCI device\n");
goto err;
}
return 0;
err:
platform_device_put(xhci);
return ret;
}
void dwc3_host_exit(struct dwc3 *dwc)
{
platform_device_unregister(dwc->xhci);
dwc->xhci = NULL;
}
|
