tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Bus Glue for Loongson LS1X built-in EHCI controller.
3 *
4 * Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
9 */
10
11
12#include <linux/platform_device.h>
13
14static int ehci_ls1x_reset(struct usb_hcd *hcd)
15{
16 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
17 int ret;
18
19 ehci->caps = hcd->regs;
20
21 ret = ehci_setup(hcd);
22 if (ret)
23 return ret;
24
25 ehci_port_power(ehci, 0);
26
27 return 0;
28}
29
30static const struct hc_driver ehci_ls1x_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "LOONGSON1 EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
34
35 /*
36 * generic hardware linkage
37 */
38 .irq = ehci_irq,
39 .flags = HCD_MEMORY | HCD_USB2,
40
41 /*
42 * basic lifecycle operations
43 */
44 .reset = ehci_ls1x_reset,
45 .start = ehci_run,
46 .stop = ehci_stop,
47 .shutdown = ehci_shutdown,
48
49 /*
50 * managing i/o requests and associated device resources
51 */
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
56
57 /*
58 * scheduling support
59 */
60 .get_frame_number = ehci_get_frame,
61
62 /*
63 * root hub support
64 */
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
67 .relinquish_port = ehci_relinquish_port,
68 .port_handed_over = ehci_port_handed_over,
69
70 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
71};
72
73static int ehci_hcd_ls1x_probe(struct platform_device *pdev)
74{
75 struct usb_hcd *hcd;
76 struct resource *res;
77 int irq;
78 int ret;
79
80 pr_debug("initializing loongson1 ehci USB Controller\n");
81
82 if (usb_disabled())
83 return -ENODEV;
84
85 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
86 if (!res) {
87 dev_err(&pdev->dev,
88 "Found HC with no IRQ. Check %s setup!\n",
89 dev_name(&pdev->dev));
90 return -ENODEV;
91 }
92 irq = res->start;
93
94 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
95 if (!res) {
96 dev_err(&pdev->dev,
97 "Found HC with no register addr. Check %s setup!\n",
98 dev_name(&pdev->dev));
99 return -ENODEV;
100 }
101
102 hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev,
103 dev_name(&pdev->dev));
104 if (!hcd)
105 return -ENOMEM;
106 hcd->rsrc_start = res->start;
107 hcd->rsrc_len = resource_size(res);
108
109 hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
110 if (hcd->regs == NULL) {
111 dev_dbg(&pdev->dev, "error mapping memory\n");
112 ret = -EFAULT;
113 goto err_put_hcd;
114 }
115
116 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
117 if (ret)
118 goto err_put_hcd;
119
120 return ret;
121
122err_put_hcd:
123 usb_put_hcd(hcd);
124 return ret;
125}
126
127static int ehci_hcd_ls1x_remove(struct platform_device *pdev)
128{
129 struct usb_hcd *hcd = platform_get_drvdata(pdev);
130
131 usb_remove_hcd(hcd);
132 usb_put_hcd(hcd);
133
134 return 0;
135}
136
137static struct platform_driver ehci_ls1x_driver = {
138 .probe = ehci_hcd_ls1x_probe,
139 .remove = ehci_hcd_ls1x_remove,
140 .shutdown = usb_hcd_platform_shutdown,
141 .driver = {
142 .name = "ls1x-ehci",
143 .owner = THIS_MODULE,
144 },
145};
146
147MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci");