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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
d07e8819 FB |
2 | /** |
3 | * host.c - DesignWare USB3 DRD Controller Host Glue | |
4 | * | |
5 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com | |
6 | * | |
7 | * Authors: Felipe Balbi <balbi@ti.com>, | |
d07e8819 FB |
8 | */ |
9 | ||
d07e8819 | 10 | #include <linux/platform_device.h> |
d07e8819 FB |
11 | |
12 | #include "core.h" | |
d07e8819 | 13 | |
6d729a55 FB |
14 | static int dwc3_host_get_irq(struct dwc3 *dwc) |
15 | { | |
16 | struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); | |
17 | int irq; | |
18 | ||
19 | irq = platform_get_irq_byname(dwc3_pdev, "host"); | |
20 | if (irq > 0) | |
21 | goto out; | |
22 | ||
23 | if (irq == -EPROBE_DEFER) | |
24 | goto out; | |
25 | ||
26 | irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3"); | |
27 | if (irq > 0) | |
28 | goto out; | |
29 | ||
30 | if (irq == -EPROBE_DEFER) | |
31 | goto out; | |
32 | ||
33 | irq = platform_get_irq(dwc3_pdev, 0); | |
34 | if (irq > 0) | |
35 | goto out; | |
36 | ||
37 | if (irq != -EPROBE_DEFER) | |
38 | dev_err(dwc->dev, "missing host IRQ\n"); | |
39 | ||
40 | if (!irq) | |
41 | irq = -EINVAL; | |
42 | ||
43 | out: | |
44 | return irq; | |
45 | } | |
46 | ||
d07e8819 FB |
47 | int dwc3_host_init(struct dwc3 *dwc) |
48 | { | |
e42a5dbb | 49 | struct property_entry props[3]; |
d07e8819 | 50 | struct platform_device *xhci; |
322832f2 RQ |
51 | int ret, irq; |
52 | struct resource *res; | |
53 | struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); | |
e42a5dbb | 54 | int prop_idx = 0; |
322832f2 | 55 | |
6d729a55 FB |
56 | irq = dwc3_host_get_irq(dwc); |
57 | if (irq < 0) | |
322832f2 RQ |
58 | return irq; |
59 | ||
6d729a55 FB |
60 | res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); |
61 | if (!res) | |
322832f2 | 62 | res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, |
6d729a55 FB |
63 | "dwc_usb3"); |
64 | if (!res) | |
65 | res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); | |
66 | if (!res) | |
67 | return -ENOMEM; | |
322832f2 RQ |
68 | |
69 | dwc->xhci_resources[1].start = irq; | |
70 | dwc->xhci_resources[1].end = irq; | |
71 | dwc->xhci_resources[1].flags = res->flags; | |
72 | dwc->xhci_resources[1].name = res->name; | |
d07e8819 | 73 | |
52758bcb | 74 | xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); |
d07e8819 FB |
75 | if (!xhci) { |
76 | dev_err(dwc->dev, "couldn't allocate xHCI device\n"); | |
08f871a3 | 77 | return -ENOMEM; |
d07e8819 FB |
78 | } |
79 | ||
d07e8819 | 80 | xhci->dev.parent = dwc->dev; |
d07e8819 FB |
81 | |
82 | dwc->xhci = xhci; | |
83 | ||
51249dca IS |
84 | ret = platform_device_add_resources(xhci, dwc->xhci_resources, |
85 | DWC3_XHCI_RESOURCES_NUM); | |
d07e8819 FB |
86 | if (ret) { |
87 | dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); | |
88 | goto err1; | |
89 | } | |
90 | ||
95b57df4 | 91 | memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); |
b2f463e1 | 92 | |
e42a5dbb FB |
93 | if (dwc->usb3_lpm_capable) |
94 | props[prop_idx++].name = "usb3-lpm-capable"; | |
95 | ||
96 | /** | |
97 | * WORKAROUND: dwc3 revisions <=3.00a have a limitation | |
98 | * where Port Disable command doesn't work. | |
99 | * | |
100 | * The suggested workaround is that we avoid Port Disable | |
101 | * completely. | |
102 | * | |
103 | * This following flag tells XHCI to do just that. | |
104 | */ | |
105 | if (dwc->revision <= DWC3_REVISION_300A) | |
106 | props[prop_idx++].name = "quirk-broken-port-ped"; | |
107 | ||
108 | if (prop_idx) { | |
95b57df4 HK |
109 | ret = platform_device_add_properties(xhci, props); |
110 | if (ret) { | |
111 | dev_err(dwc->dev, "failed to add properties to xHCI\n"); | |
112 | goto err1; | |
113 | } | |
b2f463e1 PA |
114 | } |
115 | ||
08f871a3 | 116 | phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy", |
d64ff406 | 117 | dev_name(dwc->dev)); |
08f871a3 | 118 | phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", |
d64ff406 | 119 | dev_name(dwc->dev)); |
08f871a3 | 120 | |
d07e8819 FB |
121 | ret = platform_device_add(xhci); |
122 | if (ret) { | |
123 | dev_err(dwc->dev, "failed to register xHCI device\n"); | |
08f871a3 | 124 | goto err2; |
d07e8819 FB |
125 | } |
126 | ||
127 | return 0; | |
08f871a3 HK |
128 | err2: |
129 | phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", | |
d64ff406 | 130 | dev_name(dwc->dev)); |
08f871a3 | 131 | phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", |
d64ff406 | 132 | dev_name(dwc->dev)); |
d07e8819 FB |
133 | err1: |
134 | platform_device_put(xhci); | |
d07e8819 FB |
135 | return ret; |
136 | } | |
137 | ||
138 | void dwc3_host_exit(struct dwc3 *dwc) | |
139 | { | |
08f871a3 | 140 | phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", |
d64ff406 | 141 | dev_name(dwc->dev)); |
08f871a3 | 142 | phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", |
d64ff406 | 143 | dev_name(dwc->dev)); |
d07e8819 FB |
144 | platform_device_unregister(dwc->xhci); |
145 | } |