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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/irq.h>
11#include <linux/of.h>
12#include <linux/platform_device.h>
13
14#include "core.h"
15
16static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
17 int irq, char *name)
18{
19 struct platform_device *pdev = to_platform_device(dwc->dev);
20 struct device_node *np = dev_of_node(&pdev->dev);
21
22 dwc->xhci_resources[1].start = irq;
23 dwc->xhci_resources[1].end = irq;
24 dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
25 if (!name && np)
26 dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
27 else
28 dwc->xhci_resources[1].name = name;
29}
30
31static int dwc3_host_get_irq(struct dwc3 *dwc)
32{
33 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
34 int irq;
35
36 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
37 if (irq > 0) {
38 dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
39 goto out;
40 }
41
42 if (irq == -EPROBE_DEFER)
43 goto out;
44
45 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
46 if (irq > 0) {
47 dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
48 goto out;
49 }
50
51 if (irq == -EPROBE_DEFER)
52 goto out;
53
54 irq = platform_get_irq(dwc3_pdev, 0);
55 if (irq > 0)
56 dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
57
58out:
59 return irq;
60}
61
62int dwc3_host_init(struct dwc3 *dwc)
63{
64 struct property_entry props[5];
65 struct platform_device *xhci;
66 int ret, irq;
67 int prop_idx = 0;
68
69 irq = dwc3_host_get_irq(dwc);
70 if (irq < 0)
71 return irq;
72
73 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
74 if (!xhci) {
75 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
76 return -ENOMEM;
77 }
78
79 xhci->dev.parent = 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 props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk");
93
94 if (dwc->usb3_lpm_capable)
95 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
96
97 if (dwc->usb2_lpm_disable)
98 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
99
100 /**
101 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
102 * where Port Disable command doesn't work.
103 *
104 * The suggested workaround is that we avoid Port Disable
105 * completely.
106 *
107 * This following flag tells XHCI to do just that.
108 */
109 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
110 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
111
112 if (prop_idx) {
113 ret = device_create_managed_software_node(&xhci->dev, props, NULL);
114 if (ret) {
115 dev_err(dwc->dev, "failed to add properties to xHCI\n");
116 goto err;
117 }
118 }
119
120 ret = platform_device_add(xhci);
121 if (ret) {
122 dev_err(dwc->dev, "failed to register xHCI device\n");
123 goto err;
124 }
125
126 return 0;
127err:
128 platform_device_put(xhci);
129 return ret;
130}
131
132void dwc3_host_exit(struct dwc3 *dwc)
133{
134 platform_device_unregister(dwc->xhci);
135 dwc->xhci = NULL;
136}
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
22static int dwc3_host_get_irq(struct dwc3 *dwc)
23{
24 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
25 int irq;
26
27 irq = platform_get_irq_byname(dwc3_pdev, "host");
28 if (irq > 0)
29 goto out;
30
31 if (irq == -EPROBE_DEFER)
32 goto out;
33
34 irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
35 if (irq > 0)
36 goto out;
37
38 if (irq == -EPROBE_DEFER)
39 goto out;
40
41 irq = platform_get_irq(dwc3_pdev, 0);
42 if (irq > 0)
43 goto out;
44
45 if (irq != -EPROBE_DEFER)
46 dev_err(dwc->dev, "missing host IRQ\n");
47
48 if (!irq)
49 irq = -EINVAL;
50
51out:
52 return irq;
53}
54
55int dwc3_host_init(struct dwc3 *dwc)
56{
57 struct property_entry props[3];
58 struct platform_device *xhci;
59 int ret, irq;
60 struct resource *res;
61 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
62 int prop_idx = 0;
63
64 irq = dwc3_host_get_irq(dwc);
65 if (irq < 0)
66 return irq;
67
68 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
69 if (!res)
70 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
71 "dwc_usb3");
72 if (!res)
73 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
74 if (!res)
75 return -ENOMEM;
76
77 dwc->xhci_resources[1].start = irq;
78 dwc->xhci_resources[1].end = irq;
79 dwc->xhci_resources[1].flags = res->flags;
80 dwc->xhci_resources[1].name = res->name;
81
82 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
83 if (!xhci) {
84 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
85 return -ENOMEM;
86 }
87
88 xhci->dev.parent = dwc->dev;
89
90 dwc->xhci = xhci;
91
92 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
93 DWC3_XHCI_RESOURCES_NUM);
94 if (ret) {
95 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
96 goto err1;
97 }
98
99 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
100
101 if (dwc->usb3_lpm_capable)
102 props[prop_idx++].name = "usb3-lpm-capable";
103
104 /**
105 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
106 * where Port Disable command doesn't work.
107 *
108 * The suggested workaround is that we avoid Port Disable
109 * completely.
110 *
111 * This following flag tells XHCI to do just that.
112 */
113 if (dwc->revision <= DWC3_REVISION_300A)
114 props[prop_idx++].name = "quirk-broken-port-ped";
115
116 if (prop_idx) {
117 ret = platform_device_add_properties(xhci, props);
118 if (ret) {
119 dev_err(dwc->dev, "failed to add properties to xHCI\n");
120 goto err1;
121 }
122 }
123
124 phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
125 dev_name(dwc->dev));
126 phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
127 dev_name(dwc->dev));
128
129 ret = platform_device_add(xhci);
130 if (ret) {
131 dev_err(dwc->dev, "failed to register xHCI device\n");
132 goto err2;
133 }
134
135 return 0;
136err2:
137 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
138 dev_name(dwc->dev));
139 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
140 dev_name(dwc->dev));
141err1:
142 platform_device_put(xhci);
143 return ret;
144}
145
146void dwc3_host_exit(struct dwc3 *dwc)
147{
148 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
149 dev_name(dwc->dev));
150 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
151 dev_name(dwc->dev));
152 platform_device_unregister(dwc->xhci);
153}