1 /*
2 * Generic platform ohci driver
3 *
4 * Copyright 2007 Michael Buesch <m@bues.ch>
5 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
6 *
7 * Derived from the OCHI-SSB driver
8 * Derived from the OHCI-PCI driver
9 * Copyright 1999 Roman Weissgaerber
10 * Copyright 2000-2002 David Brownell
11 * Copyright 1999 Linus Torvalds
12 * Copyright 1999 Gregory P. Smith
13 *
14 * Licensed under the GNU/GPL. See COPYING for details.
15 */
16 #include <linux/platform_device.h>
17 #include <linux/usb/ohci_pdriver.h>
18
ohci_platform_reset(struct usb_hcd * hcd)19 static int ohci_platform_reset(struct usb_hcd *hcd)
20 {
21 struct platform_device *pdev = to_platform_device(hcd->self.controller);
22 struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
23 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
24 int err;
25
26 if (pdata->big_endian_desc)
27 ohci->flags |= OHCI_QUIRK_BE_DESC;
28 if (pdata->big_endian_mmio)
29 ohci->flags |= OHCI_QUIRK_BE_MMIO;
30 if (pdata->no_big_frame_no)
31 ohci->flags |= OHCI_QUIRK_FRAME_NO;
32
33 ohci_hcd_init(ohci);
34 err = ohci_init(ohci);
35
36 return err;
37 }
38
ohci_platform_start(struct usb_hcd * hcd)39 static int ohci_platform_start(struct usb_hcd *hcd)
40 {
41 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
42 int err;
43
44 err = ohci_run(ohci);
45 if (err < 0) {
46 ohci_err(ohci, "can't start\n");
47 ohci_stop(hcd);
48 }
49
50 return err;
51 }
52
53 static const struct hc_driver ohci_platform_hc_driver = {
54 .description = hcd_name,
55 .product_desc = "Generic Platform OHCI Controller",
56 .hcd_priv_size = sizeof(struct ohci_hcd),
57
58 .irq = ohci_irq,
59 .flags = HCD_MEMORY | HCD_USB11,
60
61 .reset = ohci_platform_reset,
62 .start = ohci_platform_start,
63 .stop = ohci_stop,
64 .shutdown = ohci_shutdown,
65
66 .urb_enqueue = ohci_urb_enqueue,
67 .urb_dequeue = ohci_urb_dequeue,
68 .endpoint_disable = ohci_endpoint_disable,
69
70 .get_frame_number = ohci_get_frame,
71
72 .hub_status_data = ohci_hub_status_data,
73 .hub_control = ohci_hub_control,
74 #ifdef CONFIG_PM
75 .bus_suspend = ohci_bus_suspend,
76 .bus_resume = ohci_bus_resume,
77 #endif
78
79 .start_port_reset = ohci_start_port_reset,
80 };
81
ohci_platform_probe(struct platform_device * dev)82 static int __devinit ohci_platform_probe(struct platform_device *dev)
83 {
84 struct usb_hcd *hcd;
85 struct resource *res_mem;
86 int irq;
87 int err = -ENOMEM;
88
89 BUG_ON(!dev->dev.platform_data);
90
91 if (usb_disabled())
92 return -ENODEV;
93
94 irq = platform_get_irq(dev, 0);
95 if (irq < 0) {
96 pr_err("no irq provieded");
97 return irq;
98 }
99
100 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
101 if (!res_mem) {
102 pr_err("no memory recourse provieded");
103 return -ENXIO;
104 }
105
106 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
107 dev_name(&dev->dev));
108 if (!hcd)
109 return -ENOMEM;
110
111 hcd->rsrc_start = res_mem->start;
112 hcd->rsrc_len = resource_size(res_mem);
113
114 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
115 pr_err("controller already in use");
116 err = -EBUSY;
117 goto err_put_hcd;
118 }
119
120 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
121 if (!hcd->regs)
122 goto err_release_region;
123 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
124 if (err)
125 goto err_iounmap;
126
127 platform_set_drvdata(dev, hcd);
128
129 return err;
130
131 err_iounmap:
132 iounmap(hcd->regs);
133 err_release_region:
134 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
135 err_put_hcd:
136 usb_put_hcd(hcd);
137 return err;
138 }
139
ohci_platform_remove(struct platform_device * dev)140 static int __devexit ohci_platform_remove(struct platform_device *dev)
141 {
142 struct usb_hcd *hcd = platform_get_drvdata(dev);
143
144 usb_remove_hcd(hcd);
145 iounmap(hcd->regs);
146 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
147 usb_put_hcd(hcd);
148 platform_set_drvdata(dev, NULL);
149
150 return 0;
151 }
152
153 #ifdef CONFIG_PM
154
ohci_platform_suspend(struct device * dev)155 static int ohci_platform_suspend(struct device *dev)
156 {
157 return 0;
158 }
159
ohci_platform_resume(struct device * dev)160 static int ohci_platform_resume(struct device *dev)
161 {
162 struct usb_hcd *hcd = dev_get_drvdata(dev);
163
164 ohci_finish_controller_resume(hcd);
165 return 0;
166 }
167
168 #else /* !CONFIG_PM */
169 #define ohci_platform_suspend NULL
170 #define ohci_platform_resume NULL
171 #endif /* CONFIG_PM */
172
173 static const struct platform_device_id ohci_platform_table[] = {
174 { "ohci-platform", 0 },
175 { }
176 };
177 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
178
179 static const struct dev_pm_ops ohci_platform_pm_ops = {
180 .suspend = ohci_platform_suspend,
181 .resume = ohci_platform_resume,
182 };
183
184 static struct platform_driver ohci_platform_driver = {
185 .id_table = ohci_platform_table,
186 .probe = ohci_platform_probe,
187 .remove = __devexit_p(ohci_platform_remove),
188 .shutdown = usb_hcd_platform_shutdown,
189 .driver = {
190 .owner = THIS_MODULE,
191 .name = "ohci-platform",
192 .pm = &ohci_platform_pm_ops,
193 }
194 };
195