USB: ohci whitespace/comment fixups
[linux-2.6.git] / drivers / usb / host / ohci-lh7a404.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 Sharp LH7A404
9  *
10  * Written by Christopher Hoover <ch@hpl.hp.com>
11  * Based on fragments of previous driver by Rusell King et al.
12  *
13  * Modified for LH7A404 from ohci-sa1111.c
14  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
15  *
16  * This file is licenced under the GPL.
17  */
18
19 #include <linux/platform_device.h>
20 #include <linux/signal.h>
21
22 #include <asm/hardware.h>
23
24
25 extern int usb_disabled(void);
26
27 /*-------------------------------------------------------------------------*/
28
29 static void lh7a404_start_hc(struct platform_device *dev)
30 {
31         printk(KERN_DEBUG __FILE__
32                ": starting LH7A404 OHCI USB Controller\n");
33
34         /*
35          * Now, carefully enable the USB clock, and take
36          * the USB host controller out of reset.
37          */
38         CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */
39         udelay(1000);
40         USBH_CMDSTATUS = OHCI_HCR;
41
42         printk(KERN_DEBUG __FILE__
43                    ": Clock to USB host has been enabled \n");
44 }
45
46 static void lh7a404_stop_hc(struct platform_device *dev)
47 {
48         printk(KERN_DEBUG __FILE__
49                ": stopping LH7A404 OHCI USB Controller\n");
50
51         CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
52 }
53
54
55 /*-------------------------------------------------------------------------*/
56
57 /* configure so an HC device and id are always provided */
58 /* always called with process context; sleeping is OK */
59
60
61 /**
62  * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
63  * Context: !in_interrupt()
64  *
65  * Allocates basic resources for this USB host controller, and
66  * then invokes the start() method for the HCD associated with it
67  * through the hotplug entry's driver_data.
68  *
69  */
70 int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
71                           struct platform_device *dev)
72 {
73         int retval;
74         struct usb_hcd *hcd;
75
76         if (dev->resource[1].flags != IORESOURCE_IRQ) {
77                 pr_debug("resource[1] is not IORESOURCE_IRQ");
78                 return -ENOMEM;
79         }
80
81         hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
82         if (!hcd)
83                 return -ENOMEM;
84         hcd->rsrc_start = dev->resource[0].start;
85         hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
86
87         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
88                 pr_debug("request_mem_region failed");
89                 retval = -EBUSY;
90                 goto err1;
91         }
92
93         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
94         if (!hcd->regs) {
95                 pr_debug("ioremap failed");
96                 retval = -ENOMEM;
97                 goto err2;
98         }
99
100         lh7a404_start_hc(dev);
101         ohci_hcd_init(hcd_to_ohci(hcd));
102
103         retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
104         if (retval == 0)
105                 return retval;
106
107         lh7a404_stop_hc(dev);
108         iounmap(hcd->regs);
109  err2:
110         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
111  err1:
112         usb_put_hcd(hcd);
113         return retval;
114 }
115
116
117 /* may be called without controller electrically present */
118 /* may be called with controller, bus, and devices active */
119
120 /**
121  * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
122  * @dev: USB Host Controller being removed
123  * Context: !in_interrupt()
124  *
125  * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
126  * the HCD's stop() method.  It is always called from a thread
127  * context, normally "rmmod", "apmd", or something similar.
128  *
129  */
130 void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev)
131 {
132         usb_remove_hcd(hcd);
133         lh7a404_stop_hc(dev);
134         iounmap(hcd->regs);
135         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
136         usb_put_hcd(hcd);
137 }
138
139 /*-------------------------------------------------------------------------*/
140
141 static int __devinit
142 ohci_lh7a404_start (struct usb_hcd *hcd)
143 {
144         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
145         int             ret;
146
147         ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
148         if ((ret = ohci_init(ohci)) < 0)
149                 return ret;
150
151         if ((ret = ohci_run (ohci)) < 0) {
152                 err ("can't start %s", hcd->self.bus_name);
153                 ohci_stop (hcd);
154                 return ret;
155         }
156         return 0;
157 }
158
159 /*-------------------------------------------------------------------------*/
160
161 static const struct hc_driver ohci_lh7a404_hc_driver = {
162         .description =          hcd_name,
163         .product_desc =         "LH7A404 OHCI",
164         .hcd_priv_size =        sizeof(struct ohci_hcd),
165
166         /*
167          * generic hardware linkage
168          */
169         .irq =                  ohci_irq,
170         .flags =                HCD_USB11 | HCD_MEMORY,
171
172         /*
173          * basic lifecycle operations
174          */
175         .start =                ohci_lh7a404_start,
176         .stop =                 ohci_stop,
177         .shutdown =             ohci_shutdown,
178
179         /*
180          * managing i/o requests and associated device resources
181          */
182         .urb_enqueue =          ohci_urb_enqueue,
183         .urb_dequeue =          ohci_urb_dequeue,
184         .endpoint_disable =     ohci_endpoint_disable,
185
186         /*
187          * scheduling support
188          */
189         .get_frame_number =     ohci_get_frame,
190
191         /*
192          * root hub support
193          */
194         .hub_status_data =      ohci_hub_status_data,
195         .hub_control =          ohci_hub_control,
196         .hub_irq_enable =       ohci_rhsc_enable,
197 #ifdef  CONFIG_PM
198         .bus_suspend =          ohci_bus_suspend,
199         .bus_resume =           ohci_bus_resume,
200 #endif
201         .start_port_reset =     ohci_start_port_reset,
202 };
203
204 /*-------------------------------------------------------------------------*/
205
206 static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev)
207 {
208         int ret;
209
210         pr_debug ("In ohci_hcd_lh7a404_drv_probe");
211
212         if (usb_disabled())
213                 return -ENODEV;
214
215         ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
216         return ret;
217 }
218
219 static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev)
220 {
221         struct usb_hcd *hcd = platform_get_drvdata(pdev);
222
223         usb_hcd_lh7a404_remove(hcd, pdev);
224         return 0;
225 }
226         /*TBD*/
227 /*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev)
228 {
229         struct usb_hcd *hcd = platform_get_drvdata(dev);
230
231         return 0;
232 }
233 static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev)
234 {
235         struct usb_hcd *hcd = platform_get_drvdata(dev);
236
237
238         return 0;
239 }
240 */
241
242 static struct platform_driver ohci_hcd_lh7a404_driver = {
243         .probe          = ohci_hcd_lh7a404_drv_probe,
244         .remove         = ohci_hcd_lh7a404_drv_remove,
245         .shutdown       = usb_hcd_platform_shutdown,
246         /*.suspend      = ohci_hcd_lh7a404_drv_suspend, */
247         /*.resume       = ohci_hcd_lh7a404_drv_resume, */
248         .driver         = {
249                 .name   = "lh7a404-ohci",
250                 .owner  = THIS_MODULE,
251         },
252 };
253
254 static int __init ohci_hcd_lh7a404_init (void)
255 {
256         pr_debug (DRIVER_INFO " (LH7A404)");
257         pr_debug ("block sizes: ed %d td %d\n",
258                 sizeof (struct ed), sizeof (struct td));
259
260         return platform_driver_register(&ohci_hcd_lh7a404_driver);
261 }
262
263 static void __exit ohci_hcd_lh7a404_cleanup (void)
264 {
265         platform_driver_unregister(&ohci_hcd_lh7a404_driver);
266 }
267
268 module_init (ohci_hcd_lh7a404_init);
269 module_exit (ohci_hcd_lh7a404_cleanup);