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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 * 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}