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1// SPDX-License-Identifier: GPL-2.0
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>,
8 */
9
10#include <linux/platform_device.h>
11
12#include "core.h"
13
14static 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_optional(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_optional(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)
38 irq = -EINVAL;
39
40out:
41 return irq;
42}
43
44int dwc3_host_init(struct dwc3 *dwc)
45{
46 struct property_entry props[4];
47 struct platform_device *xhci;
48 int ret, irq;
49 struct resource *res;
50 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
51 int prop_idx = 0;
52
53 irq = dwc3_host_get_irq(dwc);
54 if (irq < 0)
55 return irq;
56
57 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
58 if (!res)
59 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
60 "dwc_usb3");
61 if (!res)
62 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
63 if (!res)
64 return -ENOMEM;
65
66 dwc->xhci_resources[1].start = irq;
67 dwc->xhci_resources[1].end = irq;
68 dwc->xhci_resources[1].flags = res->flags;
69 dwc->xhci_resources[1].name = res->name;
70
71 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
72 if (!xhci) {
73 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
74 return -ENOMEM;
75 }
76
77 xhci->dev.parent = dwc->dev;
78
79 dwc->xhci = xhci;
80
81 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
82 DWC3_XHCI_RESOURCES_NUM);
83 if (ret) {
84 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
85 goto err;
86 }
87
88 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
89
90 if (dwc->usb3_lpm_capable)
91 props[prop_idx++].name = "usb3-lpm-capable";
92
93 if (dwc->usb2_lpm_disable)
94 props[prop_idx++].name = "usb2-lpm-disable";
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) {
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 err;
113 }
114 }
115
116 ret = platform_device_add(xhci);
117 if (ret) {
118 dev_err(dwc->dev, "failed to register xHCI device\n");
119 goto err;
120 }
121
122 return 0;
123err:
124 platform_device_put(xhci);
125 return ret;
126}
127
128void dwc3_host_exit(struct dwc3 *dwc)
129{
130 platform_device_unregister(dwc->xhci);
131}
1/**
2 * host.c - DesignWare USB3 DRD Controller Host Glue
3 *
4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 of
10 * the License as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/platform_device.h>
19
20#include "core.h"
21
22int dwc3_host_init(struct dwc3 *dwc)
23{
24 struct platform_device *xhci;
25 int ret;
26
27 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
28 if (!xhci) {
29 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
30 ret = -ENOMEM;
31 goto err0;
32 }
33
34 dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
35
36 xhci->dev.parent = dwc->dev;
37 xhci->dev.dma_mask = dwc->dev->dma_mask;
38 xhci->dev.dma_parms = dwc->dev->dma_parms;
39
40 dwc->xhci = xhci;
41
42 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
43 DWC3_XHCI_RESOURCES_NUM);
44 if (ret) {
45 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
46 goto err1;
47 }
48
49 ret = platform_device_add(xhci);
50 if (ret) {
51 dev_err(dwc->dev, "failed to register xHCI device\n");
52 goto err1;
53 }
54
55 return 0;
56
57err1:
58 platform_device_put(xhci);
59
60err0:
61 return ret;
62}
63
64void dwc3_host_exit(struct dwc3 *dwc)
65{
66 platform_device_unregister(dwc->xhci);
67}