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 #include <linux/usb.h>
14 #include <linux/usb/hcd.h>
15
16 #include "../host/xhci-plat.h"
17 #include "core.h"
18
dwc3_xhci_plat_start(struct usb_hcd * hcd)19 static void dwc3_xhci_plat_start(struct usb_hcd *hcd)
20 {
21 struct platform_device *pdev;
22 struct dwc3 *dwc;
23
24 if (!usb_hcd_is_primary_hcd(hcd))
25 return;
26
27 pdev = to_platform_device(hcd->self.controller);
28 dwc = dev_get_drvdata(pdev->dev.parent);
29
30 dwc3_enable_susphy(dwc, true);
31 }
32
33 static const struct xhci_plat_priv dwc3_xhci_plat_quirk = {
34 .plat_start = dwc3_xhci_plat_start,
35 };
36
dwc3_host_fill_xhci_irq_res(struct dwc3 * dwc,int irq,char * name)37 static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
38 int irq, char *name)
39 {
40 struct platform_device *pdev = to_platform_device(dwc->dev);
41 struct device_node *np = dev_of_node(&pdev->dev);
42
43 dwc->xhci_resources[1].start = irq;
44 dwc->xhci_resources[1].end = irq;
45 dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
46 if (!name && np)
47 dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
48 else
49 dwc->xhci_resources[1].name = name;
50 }
51
dwc3_host_get_irq(struct dwc3 * dwc)52 static int dwc3_host_get_irq(struct dwc3 *dwc)
53 {
54 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
55 int irq;
56
57 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
58 if (irq > 0) {
59 dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
60 goto out;
61 }
62
63 if (irq == -EPROBE_DEFER)
64 goto out;
65
66 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
67 if (irq > 0) {
68 dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
69 goto out;
70 }
71
72 if (irq == -EPROBE_DEFER)
73 goto out;
74
75 irq = platform_get_irq(dwc3_pdev, 0);
76 if (irq > 0)
77 dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
78
79 out:
80 return irq;
81 }
82
dwc3_host_init(struct dwc3 * dwc)83 int dwc3_host_init(struct dwc3 *dwc)
84 {
85 struct property_entry props[5];
86 struct platform_device *xhci;
87 int ret, irq;
88 int prop_idx = 0;
89
90 irq = dwc3_host_get_irq(dwc);
91 if (irq < 0)
92 return irq;
93
94 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
95 if (!xhci) {
96 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
97 return -ENOMEM;
98 }
99
100 xhci->dev.parent = dwc->dev;
101
102 dwc->xhci = xhci;
103
104 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
105 DWC3_XHCI_RESOURCES_NUM);
106 if (ret) {
107 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
108 goto err;
109 }
110
111 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
112
113 props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk");
114
115 if (dwc->usb3_lpm_capable)
116 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
117
118 if (dwc->usb2_lpm_disable)
119 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
120
121 /**
122 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
123 * where Port Disable command doesn't work.
124 *
125 * The suggested workaround is that we avoid Port Disable
126 * completely.
127 *
128 * This following flag tells XHCI to do just that.
129 */
130 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
131 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
132
133 if (prop_idx) {
134 ret = device_create_managed_software_node(&xhci->dev, props, NULL);
135 if (ret) {
136 dev_err(dwc->dev, "failed to add properties to xHCI\n");
137 goto err;
138 }
139 }
140
141 ret = platform_device_add_data(xhci, &dwc3_xhci_plat_quirk,
142 sizeof(struct xhci_plat_priv));
143 if (ret)
144 goto err;
145
146 ret = platform_device_add(xhci);
147 if (ret) {
148 dev_err(dwc->dev, "failed to register xHCI device\n");
149 goto err;
150 }
151
152 if (dwc->sys_wakeup) {
153 /* Restore wakeup setting if switched from device */
154 device_wakeup_enable(dwc->sysdev);
155
156 /* Pass on wakeup setting to the new xhci platform device */
157 device_init_wakeup(&xhci->dev, true);
158 }
159
160 return 0;
161 err:
162 platform_device_put(xhci);
163 return ret;
164 }
165
dwc3_host_exit(struct dwc3 * dwc)166 void dwc3_host_exit(struct dwc3 *dwc)
167 {
168 if (dwc->sys_wakeup)
169 device_init_wakeup(&dwc->xhci->dev, false);
170
171 dwc3_enable_susphy(dwc, false);
172 platform_device_unregister(dwc->xhci);
173 dwc->xhci = NULL;
174 }
175