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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#include <linux/usb.h>
14#include <linux/usb/hcd.h>
15
16#include "../host/xhci-port.h"
17#include "../host/xhci-ext-caps.h"
18#include "../host/xhci-caps.h"
19#include "../host/xhci-plat.h"
20#include "core.h"
21
22#define XHCI_HCSPARAMS1 0x4
23#define XHCI_PORTSC_BASE 0x400
24
25/**
26 * dwc3_power_off_all_roothub_ports - Power off all Root hub ports
27 * @dwc: Pointer to our controller context structure
28 */
29static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
30{
31 void __iomem *xhci_regs;
32 u32 op_regs_base;
33 int port_num;
34 u32 offset;
35 u32 reg;
36 int i;
37
38 /* xhci regs is not mapped yet, do it temperary here */
39 if (dwc->xhci_resources[0].start) {
40 xhci_regs = ioremap(dwc->xhci_resources[0].start, DWC3_XHCI_REGS_END);
41 if (!xhci_regs) {
42 dev_err(dwc->dev, "Failed to ioremap xhci_regs\n");
43 return;
44 }
45
46 op_regs_base = HC_LENGTH(readl(xhci_regs));
47 reg = readl(xhci_regs + XHCI_HCSPARAMS1);
48 port_num = HCS_MAX_PORTS(reg);
49
50 for (i = 1; i <= port_num; i++) {
51 offset = op_regs_base + XHCI_PORTSC_BASE + 0x10 * (i - 1);
52 reg = readl(xhci_regs + offset);
53 reg &= ~PORT_POWER;
54 writel(reg, xhci_regs + offset);
55 }
56
57 iounmap(xhci_regs);
58 } else {
59 dev_err(dwc->dev, "xhci base reg invalid\n");
60 }
61}
62
63static void dwc3_xhci_plat_start(struct usb_hcd *hcd)
64{
65 struct platform_device *pdev;
66 struct dwc3 *dwc;
67
68 if (!usb_hcd_is_primary_hcd(hcd))
69 return;
70
71 pdev = to_platform_device(hcd->self.controller);
72 dwc = dev_get_drvdata(pdev->dev.parent);
73
74 dwc3_enable_susphy(dwc, true);
75}
76
77static const struct xhci_plat_priv dwc3_xhci_plat_quirk = {
78 .plat_start = dwc3_xhci_plat_start,
79};
80
81static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
82 int irq, char *name)
83{
84 struct platform_device *pdev = to_platform_device(dwc->dev);
85 struct device_node *np = dev_of_node(&pdev->dev);
86
87 dwc->xhci_resources[1].start = irq;
88 dwc->xhci_resources[1].end = irq;
89 dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
90 if (!name && np)
91 dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
92 else
93 dwc->xhci_resources[1].name = name;
94}
95
96static int dwc3_host_get_irq(struct dwc3 *dwc)
97{
98 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
99 int irq;
100
101 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
102 if (irq > 0) {
103 dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
104 goto out;
105 }
106
107 if (irq == -EPROBE_DEFER)
108 goto out;
109
110 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
111 if (irq > 0) {
112 dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
113 goto out;
114 }
115
116 if (irq == -EPROBE_DEFER)
117 goto out;
118
119 irq = platform_get_irq(dwc3_pdev, 0);
120 if (irq > 0)
121 dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
122
123out:
124 return irq;
125}
126
127int dwc3_host_init(struct dwc3 *dwc)
128{
129 struct property_entry props[5];
130 struct platform_device *xhci;
131 int ret, irq;
132 int prop_idx = 0;
133
134 /*
135 * Some platforms need to power off all Root hub ports immediately after DWC3 set to host
136 * mode to avoid VBUS glitch happen when xhci get reset later.
137 */
138 dwc3_power_off_all_roothub_ports(dwc);
139
140 irq = dwc3_host_get_irq(dwc);
141 if (irq < 0)
142 return irq;
143
144 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
145 if (!xhci) {
146 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
147 return -ENOMEM;
148 }
149
150 xhci->dev.parent = dwc->dev;
151
152 dwc->xhci = xhci;
153
154 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
155 DWC3_XHCI_RESOURCES_NUM);
156 if (ret) {
157 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
158 goto err;
159 }
160
161 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
162
163 props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk");
164
165 if (dwc->usb3_lpm_capable)
166 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
167
168 if (dwc->usb2_lpm_disable)
169 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
170
171 /**
172 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
173 * where Port Disable command doesn't work.
174 *
175 * The suggested workaround is that we avoid Port Disable
176 * completely.
177 *
178 * This following flag tells XHCI to do just that.
179 */
180 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
181 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
182
183 if (prop_idx) {
184 ret = device_create_managed_software_node(&xhci->dev, props, NULL);
185 if (ret) {
186 dev_err(dwc->dev, "failed to add properties to xHCI\n");
187 goto err;
188 }
189 }
190
191 ret = platform_device_add_data(xhci, &dwc3_xhci_plat_quirk,
192 sizeof(struct xhci_plat_priv));
193 if (ret)
194 goto err;
195
196 ret = platform_device_add(xhci);
197 if (ret) {
198 dev_err(dwc->dev, "failed to register xHCI device\n");
199 goto err;
200 }
201
202 if (dwc->sys_wakeup) {
203 /* Restore wakeup setting if switched from device */
204 device_wakeup_enable(dwc->sysdev);
205
206 /* Pass on wakeup setting to the new xhci platform device */
207 device_init_wakeup(&xhci->dev, true);
208 }
209
210 return 0;
211err:
212 platform_device_put(xhci);
213 return ret;
214}
215
216void dwc3_host_exit(struct dwc3 *dwc)
217{
218 if (dwc->sys_wakeup)
219 device_init_wakeup(&dwc->xhci->dev, false);
220
221 dwc3_enable_susphy(dwc, false);
222 platform_device_unregister(dwc->xhci);
223 dwc->xhci = NULL;
224}
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}