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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 - https://www.ti.com
6 *
7 * Authors: Felipe Balbi <balbi@ti.com>,
8 */
9
10#include <linux/acpi.h>
11#include <linux/platform_device.h>
12
13#include "core.h"
14
15static int dwc3_host_get_irq(struct dwc3 *dwc)
16{
17 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
18 int irq;
19
20 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
21 if (irq > 0)
22 goto out;
23
24 if (irq == -EPROBE_DEFER)
25 goto out;
26
27 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
28 if (irq > 0)
29 goto out;
30
31 if (irq == -EPROBE_DEFER)
32 goto out;
33
34 irq = platform_get_irq(dwc3_pdev, 0);
35 if (irq > 0)
36 goto out;
37
38 if (!irq)
39 irq = -EINVAL;
40
41out:
42 return irq;
43}
44
45int dwc3_host_init(struct dwc3 *dwc)
46{
47 struct property_entry props[4];
48 struct platform_device *xhci;
49 int ret, irq;
50 struct resource *res;
51 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
52 int prop_idx = 0;
53
54 irq = dwc3_host_get_irq(dwc);
55 if (irq < 0)
56 return irq;
57
58 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
59 if (!res)
60 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
61 "dwc_usb3");
62 if (!res)
63 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
64 if (!res)
65 return -ENOMEM;
66
67 dwc->xhci_resources[1].start = irq;
68 dwc->xhci_resources[1].end = irq;
69 dwc->xhci_resources[1].flags = res->flags;
70 dwc->xhci_resources[1].name = res->name;
71
72 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
73 if (!xhci) {
74 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
75 return -ENOMEM;
76 }
77
78 xhci->dev.parent = dwc->dev;
79 ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(dwc->dev));
80
81 dwc->xhci = xhci;
82
83 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
84 DWC3_XHCI_RESOURCES_NUM);
85 if (ret) {
86 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
87 goto err;
88 }
89
90 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
91
92 if (dwc->usb3_lpm_capable)
93 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
94
95 if (dwc->usb2_lpm_disable)
96 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
97
98 /**
99 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
100 * where Port Disable command doesn't work.
101 *
102 * The suggested workaround is that we avoid Port Disable
103 * completely.
104 *
105 * This following flag tells XHCI to do just that.
106 */
107 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
108 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
109
110 if (prop_idx) {
111 ret = platform_device_add_properties(xhci, props);
112 if (ret) {
113 dev_err(dwc->dev, "failed to add properties to xHCI\n");
114 goto err;
115 }
116 }
117
118 ret = platform_device_add(xhci);
119 if (ret) {
120 dev_err(dwc->dev, "failed to register xHCI device\n");
121 goto err;
122 }
123
124 return 0;
125err:
126 platform_device_put(xhci);
127 return ret;
128}
129
130void dwc3_host_exit(struct dwc3 *dwc)
131{
132 platform_device_unregister(dwc->xhci);
133}
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 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The names of the above-listed copyright holders may not be used
18 * to endorse or promote products derived from this software without
19 * specific prior written permission.
20 *
21 * ALTERNATIVELY, this software may be distributed under the terms of the
22 * GNU General Public License ("GPL") version 2, as published by the Free
23 * Software Foundation.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/platform_device.h>
39
40#include "core.h"
41
42int dwc3_host_init(struct dwc3 *dwc)
43{
44 struct platform_device *xhci;
45 int ret;
46
47 xhci = platform_device_alloc("xhci-hcd", -1);
48 if (!xhci) {
49 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
50 ret = -ENOMEM;
51 goto err0;
52 }
53
54 dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
55
56 xhci->dev.parent = dwc->dev;
57 xhci->dev.dma_mask = dwc->dev->dma_mask;
58 xhci->dev.dma_parms = dwc->dev->dma_parms;
59
60 dwc->xhci = xhci;
61
62 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
63 DWC3_XHCI_RESOURCES_NUM);
64 if (ret) {
65 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
66 goto err1;
67 }
68
69 ret = platform_device_add(xhci);
70 if (ret) {
71 dev_err(dwc->dev, "failed to register xHCI device\n");
72 goto err1;
73 }
74
75 return 0;
76
77err1:
78 platform_device_put(xhci);
79
80err0:
81 return ret;
82}
83
84void dwc3_host_exit(struct dwc3 *dwc)
85{
86 platform_device_unregister(dwc->xhci);
87}