Merge commit master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6 of HEAD
[linux-2.6] / 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         .urb_enqueue            = ohci_urb_enqueue,
132         .urb_dequeue            = ohci_urb_dequeue,
133         .endpoint_disable       = ohci_endpoint_disable,
134         .get_frame_number       = ohci_get_frame,
135         .hub_status_data        = ohci_hub_status_data,
136         .hub_control            = ohci_hub_control,
137 #ifdef CONFIG_PM
138         .bus_suspend            = ohci_bus_suspend,
139         .bus_resume             = ohci_bus_resume,
140 #endif
141         .start_port_reset       = ohci_start_port_reset,
142 };
143
144 extern int usb_disabled(void);
145
146 static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
147 {
148         int ret;
149
150         ret = -ENODEV;
151         if (!usb_disabled())
152                 ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
153
154         return ret;
155 }
156
157 static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
158 {
159         struct usb_hcd *hcd = platform_get_drvdata(pdev);
160
161         usb_hcd_ep93xx_remove(hcd, pdev);
162
163         return 0;
164 }
165
166 #ifdef CONFIG_PM
167 static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
168 {
169         struct usb_hcd *hcd = platform_get_drvdata(pdev);
170         struct ochi_hcd *ohci = hcd_to_ohci(hcd);
171
172         if (time_before(jiffies, ohci->next_statechange))
173                 msleep(5);
174         ohci->next_statechange = jiffies;
175
176         ep93xx_stop_hc(&pdev->dev);
177         hcd->state = HC_STATE_SUSPENDED;
178         pdev->dev.power.power_state = PMSG_SUSPEND;
179
180         return 0;
181 }
182
183 static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
184 {
185         struct usb_hcd *hcd = platform_get_drvdata(pdev);
186         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
187         int status;
188
189         if (time_before(jiffies, ohci->next_statechange))
190                 msleep(5);
191         ohci->next_statechange = jiffies;
192
193         ep93xx_start_hc(&pdev->dev);
194         pdev->dev.power.power_state = PMSG_ON;
195         usb_hcd_resume_root_hub(hcd);
196
197         return 0;
198 }
199 #endif
200
201
202 static struct platform_driver ohci_hcd_ep93xx_driver = {
203         .probe          = ohci_hcd_ep93xx_drv_probe,
204         .remove         = ohci_hcd_ep93xx_drv_remove,
205 #ifdef CONFIG_PM
206         .suspend        = ohci_hcd_ep93xx_drv_suspend,
207         .resume         = ohci_hcd_ep93xx_drv_resume,
208 #endif
209         .driver         = {
210                 .name   = "ep93xx-ohci",
211         },
212 };
213
214 static int __init ohci_hcd_ep93xx_init(void)
215 {
216         return platform_driver_register(&ohci_hcd_ep93xx_driver);
217 }
218
219 static void __exit ohci_hcd_ep93xx_cleanup(void)
220 {
221         platform_driver_unregister(&ohci_hcd_ep93xx_driver);
222 }
223
224 module_init(ohci_hcd_ep93xx_init);
225 module_exit(ohci_hcd_ep93xx_cleanup);