tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * Bus Glue for Atheros AR71XX/AR724X built-in OHCI controller.
5 *
6 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
7 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 *
9 * Parts of this file are based on Atheros' 2.6.15 BSP
10 * Copyright (C) 2007 Atheros Communications, Inc.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published
14 * by the Free Software Foundation.
15 */
16
17#include <linux/platform_device.h>
18
19static int __devinit ohci_ath79_start(struct usb_hcd *hcd)
20{
21 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
22 int ret;
23
24 ret = ohci_init(ohci);
25 if (ret < 0)
26 return ret;
27
28 ret = ohci_run(ohci);
29 if (ret < 0)
30 goto err;
31
32 return 0;
33
34err:
35 ohci_stop(hcd);
36 return ret;
37}
38
39static const struct hc_driver ohci_ath79_hc_driver = {
40 .description = hcd_name,
41 .product_desc = "Atheros built-in OHCI controller",
42 .hcd_priv_size = sizeof(struct ohci_hcd),
43
44 .irq = ohci_irq,
45 .flags = HCD_USB11 | HCD_MEMORY,
46
47 .start = ohci_ath79_start,
48 .stop = ohci_stop,
49 .shutdown = ohci_shutdown,
50
51 .urb_enqueue = ohci_urb_enqueue,
52 .urb_dequeue = ohci_urb_dequeue,
53 .endpoint_disable = ohci_endpoint_disable,
54
55 /*
56 * scheduling support
57 */
58 .get_frame_number = ohci_get_frame,
59
60 /*
61 * root hub support
62 */
63 .hub_status_data = ohci_hub_status_data,
64 .hub_control = ohci_hub_control,
65 .start_port_reset = ohci_start_port_reset,
66};
67
68static int ohci_ath79_probe(struct platform_device *pdev)
69{
70 struct usb_hcd *hcd;
71 struct resource *res;
72 int irq;
73 int ret;
74
75 if (usb_disabled())
76 return -ENODEV;
77
78 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
79 if (!res) {
80 dev_dbg(&pdev->dev, "no IRQ specified\n");
81 return -ENODEV;
82 }
83 irq = res->start;
84
85 hcd = usb_create_hcd(&ohci_ath79_hc_driver, &pdev->dev,
86 dev_name(&pdev->dev));
87 if (!hcd)
88 return -ENOMEM;
89
90 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
91 if (!res) {
92 dev_dbg(&pdev->dev, "no base address specified\n");
93 ret = -ENODEV;
94 goto err_put_hcd;
95 }
96 hcd->rsrc_start = res->start;
97 hcd->rsrc_len = res->end - res->start + 1;
98
99 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
100 dev_dbg(&pdev->dev, "controller already in use\n");
101 ret = -EBUSY;
102 goto err_put_hcd;
103 }
104
105 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
106 if (!hcd->regs) {
107 dev_dbg(&pdev->dev, "error mapping memory\n");
108 ret = -EFAULT;
109 goto err_release_region;
110 }
111
112 ohci_hcd_init(hcd_to_ohci(hcd));
113
114 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
115 if (ret)
116 goto err_stop_hcd;
117
118 return 0;
119
120err_stop_hcd:
121 iounmap(hcd->regs);
122err_release_region:
123 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
124err_put_hcd:
125 usb_put_hcd(hcd);
126 return ret;
127}
128
129static int ohci_ath79_remove(struct platform_device *pdev)
130{
131 struct usb_hcd *hcd = platform_get_drvdata(pdev);
132
133 usb_remove_hcd(hcd);
134 iounmap(hcd->regs);
135 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
136 usb_put_hcd(hcd);
137
138 return 0;
139}
140
141static struct platform_driver ohci_hcd_ath79_driver = {
142 .probe = ohci_ath79_probe,
143 .remove = ohci_ath79_remove,
144 .shutdown = usb_hcd_platform_shutdown,
145 .driver = {
146 .name = "ath79-ohci",
147 .owner = THIS_MODULE,
148 },
149};
150
151MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ohci");