Loading...
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#include <linux/usb/xhci_pdriver.h>
20
21#include "core.h"
22
23int dwc3_host_init(struct dwc3 *dwc)
24{
25 struct platform_device *xhci;
26 struct usb_xhci_pdata pdata;
27 int ret;
28
29 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
30 if (!xhci) {
31 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
32 return -ENOMEM;
33 }
34
35 dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
36
37 xhci->dev.parent = dwc->dev;
38 xhci->dev.dma_mask = dwc->dev->dma_mask;
39 xhci->dev.dma_parms = dwc->dev->dma_parms;
40
41 dwc->xhci = xhci;
42
43 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
44 DWC3_XHCI_RESOURCES_NUM);
45 if (ret) {
46 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
47 goto err1;
48 }
49
50 memset(&pdata, 0, sizeof(pdata));
51
52 pdata.usb3_lpm_capable = dwc->usb3_lpm_capable;
53
54 ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
55 if (ret) {
56 dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
57 goto err1;
58 }
59
60 phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
61 dev_name(&xhci->dev));
62 phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
63 dev_name(&xhci->dev));
64
65 ret = platform_device_add(xhci);
66 if (ret) {
67 dev_err(dwc->dev, "failed to register xHCI device\n");
68 goto err2;
69 }
70
71 return 0;
72err2:
73 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
74 dev_name(&xhci->dev));
75 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
76 dev_name(&xhci->dev));
77err1:
78 platform_device_put(xhci);
79 return ret;
80}
81
82void dwc3_host_exit(struct dwc3 *dwc)
83{
84 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
85 dev_name(&dwc->xhci->dev));
86 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
87 dev_name(&dwc->xhci->dev));
88 platform_device_unregister(dwc->xhci);
89}
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(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(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 != -EPROBE_DEFER)
38 dev_err(dwc->dev, "missing host IRQ\n");
39
40 if (!irq)
41 irq = -EINVAL;
42
43out:
44 return irq;
45}
46
47int dwc3_host_init(struct dwc3 *dwc)
48{
49 struct property_entry props[3];
50 struct platform_device *xhci;
51 int ret, irq;
52 struct resource *res;
53 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
54 int prop_idx = 0;
55
56 irq = dwc3_host_get_irq(dwc);
57 if (irq < 0)
58 return irq;
59
60 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
61 if (!res)
62 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
63 "dwc_usb3");
64 if (!res)
65 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
66 if (!res)
67 return -ENOMEM;
68
69 dwc->xhci_resources[1].start = irq;
70 dwc->xhci_resources[1].end = irq;
71 dwc->xhci_resources[1].flags = res->flags;
72 dwc->xhci_resources[1].name = res->name;
73
74 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
75 if (!xhci) {
76 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
77 return -ENOMEM;
78 }
79
80 xhci->dev.parent = dwc->dev;
81
82 dwc->xhci = xhci;
83
84 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
85 DWC3_XHCI_RESOURCES_NUM);
86 if (ret) {
87 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
88 goto err1;
89 }
90
91 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
92
93 if (dwc->usb3_lpm_capable)
94 props[prop_idx++].name = "usb3-lpm-capable";
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 err1;
113 }
114 }
115
116 phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
117 dev_name(dwc->dev));
118 phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
119 dev_name(dwc->dev));
120
121 ret = platform_device_add(xhci);
122 if (ret) {
123 dev_err(dwc->dev, "failed to register xHCI device\n");
124 goto err2;
125 }
126
127 return 0;
128err2:
129 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
130 dev_name(dwc->dev));
131 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
132 dev_name(dwc->dev));
133err1:
134 platform_device_put(xhci);
135 return ret;
136}
137
138void dwc3_host_exit(struct dwc3 *dwc)
139{
140 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
141 dev_name(dwc->dev));
142 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
143 dev_name(dwc->dev));
144 platform_device_unregister(dwc->xhci);
145}