USB: ohci whitespace/comment fixups
[linux-2.6.git] / drivers / usb / host / ohci-ep93xx.c
1 /*
2  * OHCI HCD (Host Controller Driver) for USB.
3  *
4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5  * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6  * (C) Copyright 2002 Hewlett-Packard Company
7  *
8  * Bus Glue for ep93xx.
9  *
10  * Written by Christopher Hoover <ch@hpl.hp.com>
11  * Based on fragments of previous driver by Russell King et al.
12  *
13  * Modified for LH7A404 from ohci-sa1111.c
14  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
15  *
16  * Modified for pxa27x from ohci-lh7a404.c
17  *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
18  *
19  * Modified for ep93xx from ohci-pxa27x.c
20  *  by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
21  *  Based on an earlier driver by Ray Lehtiniemi
22  *
23  * This file is licenced under the GPL.
24  */
25
26 #include <linux/clk.h>
27 #include <linux/device.h>
28 #include <linux/signal.h>
29 #include <linux/platform_device.h>
30
31 #include <asm/mach-types.h>
32 #include <asm/hardware.h>
33
34 static struct clk *usb_host_clock;
35
36 static void ep93xx_start_hc(struct device *dev)
37 {
38         clk_enable(usb_host_clock);
39 }
40
41 static void ep93xx_stop_hc(struct device *dev)
42 {
43         clk_disable(usb_host_clock);
44 }
45
46 static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
47                          struct platform_device *pdev)
48 {
49         int retval;
50         struct usb_hcd *hcd;
51
52         if (pdev->resource[1].flags != IORESOURCE_IRQ) {
53                 pr_debug("resource[1] is not IORESOURCE_IRQ");
54                 return -ENOMEM;
55         }
56
57         hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
58         if (hcd == NULL)
59                 return -ENOMEM;
60
61         hcd->rsrc_start = pdev->resource[0].start;
62         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
63         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
64                 usb_put_hcd(hcd);
65                 retval = -EBUSY;
66                 goto err1;
67         }
68
69         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
70         if (hcd->regs == NULL) {
71                 pr_debug("ioremap failed");
72                 retval = -ENOMEM;
73                 goto err2;
74         }
75
76         usb_host_clock = clk_get(&pdev->dev, "usb_host");
77         ep93xx_start_hc(&pdev->dev);
78
79         ohci_hcd_init(hcd_to_ohci(hcd));
80
81         retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
82         if (retval == 0)
83                 return retval;
84
85         ep93xx_stop_hc(&pdev->dev);
86         iounmap(hcd->regs);
87 err2:
88         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
89 err1:
90         usb_put_hcd(hcd);
91
92         return retval;
93 }
94
95 static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
96                         struct platform_device *pdev)
97 {
98         usb_remove_hcd(hcd);
99         ep93xx_stop_hc(&pdev->dev);
100         clk_put(usb_host_clock);
101         iounmap(hcd->regs);
102         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
103         usb_put_hcd(hcd);
104 }
105
106 static int __devinit ohci_ep93xx_start(struct usb_hcd *hcd)
107 {
108         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
109         int ret;
110
111         if ((ret = ohci_init(ohci)) < 0)
112                 return ret;
113
114         if ((ret = ohci_run(ohci)) < 0) {
115                 err("can't start %s", hcd->self.bus_name);
116                 ohci_stop(hcd);
117                 return ret;
118         }
119
120         return 0;
121 }
122
123 static struct hc_driver ohci_ep93xx_hc_driver = {
124         .description            = hcd_name,
125         .product_desc           = "EP93xx OHCI",
126         .hcd_priv_size          = sizeof(struct ohci_hcd),
127         .irq                    = ohci_irq,
128         .flags                  = HCD_USB11 | HCD_MEMORY,
129         .start                  = ohci_ep93xx_start,
130         .stop                   = ohci_stop,
131         .shutdown               = ohci_shutdown,
132         .urb_enqueue            = ohci_urb_enqueue,
133         .urb_dequeue            = ohci_urb_dequeue,
134         .endpoint_disable       = ohci_endpoint_disable,
135         .get_frame_number       = ohci_get_frame,
136         .hub_status_data        = ohci_hub_status_data,
137         .hub_control            = ohci_hub_control,
138         .hub_irq_enable         = ohci_rhsc_enable,
139 #ifdef CONFIG_PM
140         .bus_suspend            = ohci_bus_suspend,
141         .bus_resume             = ohci_bus_resume,
142 #endif
143         .start_port_reset       = ohci_start_port_reset,
144 };
145
146 extern int usb_disabled(void);
147
148 static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
149 {
150         int ret;
151
152         ret = -ENODEV;
153         if (!usb_disabled())
154                 ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
155
156         return ret;
157 }
158
159 static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
160 {
161         struct usb_hcd *hcd = platform_get_drvdata(pdev);
162
163         usb_hcd_ep93xx_remove(hcd, pdev);
164
165         return 0;
166 }
167
168 #ifdef CONFIG_PM
169 static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
170 {
171         struct usb_hcd *hcd = platform_get_drvdata(pdev);
172         struct ochi_hcd *ohci = hcd_to_ohci(hcd);
173
174         if (time_before(jiffies, ohci->next_statechange))
175                 msleep(5);
176         ohci->next_statechange = jiffies;
177
178         ep93xx_stop_hc(&pdev->dev);
179         hcd->state = HC_STATE_SUSPENDED;
180         pdev->dev.power.power_state = PMSG_SUSPEND;
181
182         return 0;
183 }
184
185 static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
186 {
187         struct usb_hcd *hcd = platform_get_drvdata(pdev);
188         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
189         int status;
190
191         if (time_before(jiffies, ohci->next_statechange))
192                 msleep(5);
193         ohci->next_statechange = jiffies;
194
195         ep93xx_start_hc(&pdev->dev);
196         pdev->dev.power.power_state = PMSG_ON;
197         usb_hcd_resume_root_hub(hcd);
198
199         return 0;
200 }
201 #endif
202
203
204 static struct platform_driver ohci_hcd_ep93xx_driver = {
205         .probe          = ohci_hcd_ep93xx_drv_probe,
206         .remove         = ohci_hcd_ep93xx_drv_remove,
207         .shutdown       = usb_hcd_platform_shutdown,
208 #ifdef CONFIG_PM
209         .suspend        = ohci_hcd_ep93xx_drv_suspend,
210         .resume         = ohci_hcd_ep93xx_drv_resume,
211 #endif
212         .driver         = {
213                 .name   = "ep93xx-ohci",
214         },
215 };
216
217 static int __init ohci_hcd_ep93xx_init(void)
218 {
219         return platform_driver_register(&ohci_hcd_ep93xx_driver);
220 }
221
222 static void __exit ohci_hcd_ep93xx_cleanup(void)
223 {
224         platform_driver_unregister(&ohci_hcd_ep93xx_driver);
225 }
226
227 module_init(ohci_hcd_ep93xx_init);
228 module_exit(ohci_hcd_ep93xx_cleanup);