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[linux-2.6.git] / drivers / usb / host / ohci-ppc-soc.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  * (C) Copyright 2003-2005 MontaVista Software Inc.
8  * 
9  * Bus Glue for PPC On-Chip OHCI driver
10  * Tested on Freescale MPC5200 and IBM STB04xxx
11  *
12  * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c
13  *
14  * This file is licenced under the GPL.
15  */
16
17 #include <asm/usb.h>
18
19 /* configure so an HC device and id are always provided */
20 /* always called with process context; sleeping is OK */
21
22 /**
23  * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
24  * Context: !in_interrupt()
25  *
26  * Allocates basic resources for this USB host controller, and
27  * then invokes the start() method for the HCD associated with it
28  * through the hotplug entry's driver_data.
29  *
30  * Store this function in the HCD's struct pci_driver as probe().
31  */
32 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
33                           struct platform_device *pdev)
34 {
35         int retval;
36         struct usb_hcd *hcd;
37         struct ohci_hcd *ohci;
38         struct resource *res;
39         int irq;
40         struct usb_hcd_platform_data *pd = pdev->dev.platform_data;
41
42         pr_debug("initializing PPC-SOC USB Controller\n");
43
44         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
45         if (!res) {
46                 pr_debug(__FILE__ ": no irq\n");
47                 return -ENODEV;
48         }
49         irq = res->start;
50
51         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
52         if (!res) {
53                 pr_debug(__FILE__ ": no reg addr\n");
54                 return -ENODEV;
55         }
56
57         hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
58         if (!hcd)
59                 return -ENOMEM;
60         hcd->rsrc_start = res->start;
61         hcd->rsrc_len = res->end - res->start + 1;
62
63         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
64                 pr_debug(__FILE__ ": request_mem_region failed\n");
65                 retval = -EBUSY;
66                 goto err1;
67         }
68
69         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
70         if (!hcd->regs) {
71                 pr_debug(__FILE__ ": ioremap failed\n");
72                 retval = -ENOMEM;
73                 goto err2;
74         }
75
76         if (pd->start && (retval = pd->start(pdev)))
77                 goto err3;
78
79         ohci = hcd_to_ohci(hcd);
80         ohci->flags |= OHCI_BIG_ENDIAN;
81         ohci_hcd_init(ohci);
82
83         retval = usb_add_hcd(hcd, irq, SA_INTERRUPT);
84         if (retval == 0)
85                 return retval;
86
87         pr_debug("Removing PPC-SOC USB Controller\n");
88         if (pd && pd->stop)
89                 pd->stop(pdev);
90  err3:
91         iounmap(hcd->regs);
92  err2:
93         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
94  err1:
95         usb_put_hcd(hcd);
96         return retval;
97 }
98
99
100 /* may be called without controller electrically present */
101 /* may be called with controller, bus, and devices active */
102
103 /**
104  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
105  * @pdev: USB Host Controller being removed
106  * Context: !in_interrupt()
107  *
108  * Reverses the effect of usb_hcd_ppc_soc_probe(), first invoking
109  * the HCD's stop() method.  It is always called from a thread
110  * context, normally "rmmod", "apmd", or something similar.
111  *
112  */
113 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
114                 struct platform_device *pdev)
115 {
116         struct usb_hcd_platform_data *pd = pdev->dev.platform_data;
117
118         usb_remove_hcd(hcd);
119
120         pr_debug("stopping PPC-SOC USB Controller\n");
121         if (pd && pd->stop)
122                 pd->stop(pdev);
123
124         iounmap(hcd->regs);
125         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
126         usb_hcd_put(hcd);
127 }
128
129 static int __devinit
130 ohci_ppc_soc_start(struct usb_hcd *hcd)
131 {
132         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
133         int             ret;
134
135         if ((ret = ohci_init(ohci)) < 0)
136                 return ret;
137
138         if ((ret = ohci_run(ohci)) < 0) {
139                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
140                 ohci_stop(hcd);
141                 return ret;
142         }
143
144         return 0;
145 }
146
147 static const struct hc_driver ohci_ppc_soc_hc_driver = {
148         .description =          hcd_name,
149         .hcd_priv_size =        sizeof(struct ohci_hcd),
150
151         /*
152          * generic hardware linkage
153          */
154         .irq =                  ohci_irq,
155         .flags =                HCD_USB11 | HCD_MEMORY,
156
157         /*
158          * basic lifecycle operations
159          */
160         .start =                ohci_ppc_soc_start,
161         .stop =                 ohci_stop,
162
163         /*
164          * managing i/o requests and associated device resources
165          */
166         .urb_enqueue =          ohci_urb_enqueue,
167         .urb_dequeue =          ohci_urb_dequeue,
168         .endpoint_disable =     ohci_endpoint_disable,
169
170         /*
171          * scheduling support
172          */
173         .get_frame_number =     ohci_get_frame,
174
175         /*
176          * root hub support
177          */
178         .hub_status_data =      ohci_hub_status_data,
179         .hub_control =          ohci_hub_control,
180 #ifdef  CONFIG_USB_SUSPEND
181         .hub_suspend =          ohci_hub_suspend,
182         .hub_resume =           ohci_hub_resume,
183 #endif
184         .start_port_reset =     ohci_start_port_reset,
185 };
186
187 static int ohci_hcd_ppc_soc_drv_probe(struct device *dev)
188 {
189         struct platform_device *pdev = to_platform_device(dev);
190         int ret;
191
192         if (usb_disabled())
193                 return -ENODEV;
194
195         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
196         return ret;
197 }
198
199 static int ohci_hcd_ppc_soc_drv_remove(struct device *dev)
200 {
201         struct platform_device *pdev = to_platform_device(dev);
202         struct usb_hcd *hcd = dev_get_drvdata(dev);
203
204         usb_hcd_ppc_soc_remove(hcd, pdev);
205         return 0;
206 }
207
208 static struct device_driver ohci_hcd_ppc_soc_driver = {
209         .name           = "ppc-soc-ohci",
210         .bus            = &platform_bus_type,
211         .probe          = ohci_hcd_ppc_soc_drv_probe,
212         .remove         = ohci_hcd_ppc_soc_drv_remove,
213 #if     defined(CONFIG_USB_SUSPEND) || defined(CONFIG_PM)
214         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
215         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
216 #endif
217 };
218
219 static int __init ohci_hcd_ppc_soc_init(void)
220 {
221         pr_debug(DRIVER_INFO " (PPC SOC)\n");
222         pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed),
223                                                         sizeof(struct td));
224
225         return driver_register(&ohci_hcd_ppc_soc_driver);
226 }
227
228 static void __exit ohci_hcd_ppc_soc_cleanup(void)
229 {
230         driver_unregister(&ohci_hcd_ppc_soc_driver);
231 }
232
233 module_init(ohci_hcd_ppc_soc_init);
234 module_exit(ohci_hcd_ppc_soc_cleanup);