tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * EHCI HCD for Netlogic XLS processors.
3 *
4 * (C) Copyright 2011 Netlogic Microsystems Inc.
5 *
6 * Based on various ehci-*.c drivers
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive for
10 * more details.
11 */
12
13#include <linux/platform_device.h>
14
15static int ehci_xls_setup(struct usb_hcd *hcd)
16{
17 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
18
19 ehci->caps = hcd->regs;
20
21 return ehci_setup(hcd);
22}
23
24int ehci_xls_probe_internal(const struct hc_driver *driver,
25 struct platform_device *pdev)
26{
27 struct usb_hcd *hcd;
28 struct resource *res;
29 int retval, irq;
30
31 /* Get our IRQ from an earlier registered Platform Resource */
32 irq = platform_get_irq(pdev, 0);
33 if (irq < 0) {
34 dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n",
35 dev_name(&pdev->dev));
36 return -ENODEV;
37 }
38
39 /* Get our Memory Handle */
40 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
41 if (!res) {
42 dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n",
43 dev_name(&pdev->dev));
44 return -ENODEV;
45 }
46 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
47 if (!hcd) {
48 retval = -ENOMEM;
49 goto err1;
50 }
51
52 hcd->rsrc_start = res->start;
53 hcd->rsrc_len = resource_size(res);
54
55 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
56 driver->description)) {
57 dev_dbg(&pdev->dev, "controller already in use\n");
58 retval = -EBUSY;
59 goto err2;
60 }
61 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
62
63 if (hcd->regs == NULL) {
64 dev_dbg(&pdev->dev, "error mapping memory\n");
65 retval = -EFAULT;
66 goto err3;
67 }
68
69 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
70 if (retval != 0)
71 goto err4;
72 return retval;
73
74err4:
75 iounmap(hcd->regs);
76err3:
77 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
78err2:
79 usb_put_hcd(hcd);
80err1:
81 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev),
82 retval);
83 return retval;
84}
85
86static struct hc_driver ehci_xls_hc_driver = {
87 .description = hcd_name,
88 .product_desc = "XLS EHCI Host Controller",
89 .hcd_priv_size = sizeof(struct ehci_hcd),
90 .irq = ehci_irq,
91 .flags = HCD_USB2 | HCD_MEMORY,
92 .reset = ehci_xls_setup,
93 .start = ehci_run,
94 .stop = ehci_stop,
95 .shutdown = ehci_shutdown,
96
97 .urb_enqueue = ehci_urb_enqueue,
98 .urb_dequeue = ehci_urb_dequeue,
99 .endpoint_disable = ehci_endpoint_disable,
100 .endpoint_reset = ehci_endpoint_reset,
101
102 .get_frame_number = ehci_get_frame,
103
104 .hub_status_data = ehci_hub_status_data,
105 .hub_control = ehci_hub_control,
106 .bus_suspend = ehci_bus_suspend,
107 .bus_resume = ehci_bus_resume,
108 .relinquish_port = ehci_relinquish_port,
109 .port_handed_over = ehci_port_handed_over,
110
111 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
112};
113
114static int ehci_xls_probe(struct platform_device *pdev)
115{
116 if (usb_disabled())
117 return -ENODEV;
118
119 return ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev);
120}
121
122static int ehci_xls_remove(struct platform_device *pdev)
123{
124 struct usb_hcd *hcd = platform_get_drvdata(pdev);
125
126 usb_remove_hcd(hcd);
127 iounmap(hcd->regs);
128 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
129 usb_put_hcd(hcd);
130 return 0;
131}
132
133MODULE_ALIAS("ehci-xls");
134
135static struct platform_driver ehci_xls_driver = {
136 .probe = ehci_xls_probe,
137 .remove = ehci_xls_remove,
138 .shutdown = usb_hcd_platform_shutdown,
139 .driver = {
140 .name = "ehci-xls",
141 },
142};