Merge branch 'sky2'
[linux-2.6] / 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
21 #include <asm/hardware.h>
22
23
24 extern int usb_disabled(void);
25
26 /*-------------------------------------------------------------------------*/
27
28 static void lh7a404_start_hc(struct platform_device *dev)
29 {
30         printk(KERN_DEBUG __FILE__
31                ": starting LH7A404 OHCI USB Controller\n");
32
33         /*
34          * Now, carefully enable the USB clock, and take
35          * the USB host controller out of reset.
36          */
37         CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */
38         udelay(1000);
39         USBH_CMDSTATUS = OHCI_HCR;
40         
41         printk(KERN_DEBUG __FILE__
42                    ": Clock to USB host has been enabled \n");
43 }
44
45 static void lh7a404_stop_hc(struct platform_device *dev)
46 {
47         printk(KERN_DEBUG __FILE__
48                ": stopping LH7A404 OHCI USB Controller\n");
49
50         CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
51 }
52
53
54 /*-------------------------------------------------------------------------*/
55
56 /* configure so an HC device and id are always provided */
57 /* always called with process context; sleeping is OK */
58
59
60 /**
61  * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
62  * Context: !in_interrupt()
63  *
64  * Allocates basic resources for this USB host controller, and
65  * then invokes the start() method for the HCD associated with it
66  * through the hotplug entry's driver_data.
67  *
68  */
69 int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
70                           struct platform_device *dev)
71 {
72         int retval;
73         struct usb_hcd *hcd;
74
75         if (dev->resource[1].flags != IORESOURCE_IRQ) {
76                 pr_debug("resource[1] is not IORESOURCE_IRQ");
77                 return -ENOMEM;
78         }
79
80         hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
81         if (!hcd)
82                 return -ENOMEM;
83         hcd->rsrc_start = dev->resource[0].start;
84         hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
85
86         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
87                 pr_debug("request_mem_region failed");
88                 retval = -EBUSY;
89                 goto err1;
90         }
91         
92         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
93         if (!hcd->regs) {
94                 pr_debug("ioremap failed");
95                 retval = -ENOMEM;
96                 goto err2;
97         }
98
99         lh7a404_start_hc(dev);
100         ohci_hcd_init(hcd_to_ohci(hcd));
101
102         retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
103         if (retval == 0)
104                 return retval;
105
106         lh7a404_stop_hc(dev);
107         iounmap(hcd->regs);
108  err2:
109         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
110  err1:
111         usb_put_hcd(hcd);
112         return retval;
113 }
114
115
116 /* may be called without controller electrically present */
117 /* may be called with controller, bus, and devices active */
118
119 /**
120  * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
121  * @dev: USB Host Controller being removed
122  * Context: !in_interrupt()
123  *
124  * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
125  * the HCD's stop() method.  It is always called from a thread
126  * context, normally "rmmod", "apmd", or something similar.
127  *
128  */
129 void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev)
130 {
131         usb_remove_hcd(hcd);
132         lh7a404_stop_hc(dev);
133         iounmap(hcd->regs);
134         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
135         usb_put_hcd(hcd);
136 }
137
138 /*-------------------------------------------------------------------------*/
139
140 static int __devinit
141 ohci_lh7a404_start (struct usb_hcd *hcd)
142 {
143         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
144         int             ret;
145
146         ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
147         if ((ret = ohci_init(ohci)) < 0)
148                 return ret;
149
150         if ((ret = ohci_run (ohci)) < 0) {
151                 err ("can't start %s", hcd->self.bus_name);
152                 ohci_stop (hcd);
153                 return ret;
154         }
155         return 0;
156 }
157
158 /*-------------------------------------------------------------------------*/
159
160 static const struct hc_driver ohci_lh7a404_hc_driver = {
161         .description =          hcd_name,
162         .product_desc =         "LH7A404 OHCI",
163         .hcd_priv_size =        sizeof(struct ohci_hcd),
164
165         /*
166          * generic hardware linkage
167          */
168         .irq =                  ohci_irq,
169         .flags =                HCD_USB11 | HCD_MEMORY,
170
171         /*
172          * basic lifecycle operations
173          */
174         .start =                ohci_lh7a404_start,
175 #ifdef  CONFIG_PM
176         /* suspend:             ohci_lh7a404_suspend,  -- tbd */
177         /* resume:              ohci_lh7a404_resume,   -- tbd */
178 #endif /*CONFIG_PM*/
179         .stop =                 ohci_stop,
180
181         /*
182          * managing i/o requests and associated device resources
183          */
184         .urb_enqueue =          ohci_urb_enqueue,
185         .urb_dequeue =          ohci_urb_dequeue,
186         .endpoint_disable =     ohci_endpoint_disable,
187
188         /*
189          * scheduling support
190          */
191         .get_frame_number =     ohci_get_frame,
192
193         /*
194          * root hub support
195          */
196         .hub_status_data =      ohci_hub_status_data,
197         .hub_control =          ohci_hub_control,
198 #ifdef  CONFIG_PM
199         .bus_suspend =          ohci_bus_suspend,
200         .bus_resume =           ohci_bus_resume,
201 #endif
202         .start_port_reset =     ohci_start_port_reset,
203 };
204
205 /*-------------------------------------------------------------------------*/
206
207 static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev)
208 {
209         int ret;
210
211         pr_debug ("In ohci_hcd_lh7a404_drv_probe");
212
213         if (usb_disabled())
214                 return -ENODEV;
215
216         ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
217         return ret;
218 }
219
220 static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev)
221 {
222         struct usb_hcd *hcd = platform_get_drvdata(dev);
223
224         usb_hcd_lh7a404_remove(hcd, pdev);
225         return 0;
226 }
227         /*TBD*/
228 /*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev)
229 {
230         struct usb_hcd *hcd = platform_get_drvdata(dev);
231
232         return 0;
233 }
234 static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev)
235 {
236         struct usb_hcd *hcd = platform_get_drvdata(dev);
237
238
239         return 0;
240 }
241 */
242
243 static struct platform_driver ohci_hcd_lh7a404_driver = {
244         .probe          = ohci_hcd_lh7a404_drv_probe,
245         .remove         = ohci_hcd_lh7a404_drv_remove,
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);