Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6] / 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 <linux/platform_device.h>
18 #include <linux/signal.h>
19
20 /* configure so an HC device and id are always provided */
21 /* always called with process context; sleeping is OK */
22
23 /**
24  * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
25  * Context: !in_interrupt()
26  *
27  * Allocates basic resources for this USB host controller.
28  *
29  * Store this function in the HCD's struct pci_driver as probe().
30  */
31 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
32                           struct platform_device *pdev)
33 {
34         int retval;
35         struct usb_hcd *hcd;
36         struct ohci_hcd *ohci;
37         struct resource *res;
38         int irq;
39
40         pr_debug("initializing PPC-SOC USB Controller\n");
41
42         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
43         if (!res) {
44                 pr_debug(__FILE__ ": no irq\n");
45                 return -ENODEV;
46         }
47         irq = res->start;
48
49         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
50         if (!res) {
51                 pr_debug(__FILE__ ": no reg addr\n");
52                 return -ENODEV;
53         }
54
55         hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
56         if (!hcd)
57                 return -ENOMEM;
58         hcd->rsrc_start = res->start;
59         hcd->rsrc_len = res->end - res->start + 1;
60
61         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
62                 pr_debug(__FILE__ ": request_mem_region failed\n");
63                 retval = -EBUSY;
64                 goto err1;
65         }
66
67         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
68         if (!hcd->regs) {
69                 pr_debug(__FILE__ ": ioremap failed\n");
70                 retval = -ENOMEM;
71                 goto err2;
72         }
73
74         ohci = hcd_to_ohci(hcd);
75         ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
76
77 #ifdef CONFIG_PPC_MPC52xx
78         /* MPC52xx doesn't need frame_no shift */
79         ohci->flags |= OHCI_QUIRK_FRAME_NO;
80 #endif
81         ohci_hcd_init(ohci);
82
83         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
84         if (retval == 0)
85                 return retval;
86
87         pr_debug("Removing PPC-SOC USB Controller\n");
88
89         iounmap(hcd->regs);
90  err2:
91         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
92  err1:
93         usb_put_hcd(hcd);
94         return retval;
95 }
96
97
98 /* may be called without controller electrically present */
99 /* may be called with controller, bus, and devices active */
100
101 /**
102  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
103  * @pdev: USB Host Controller being removed
104  * Context: !in_interrupt()
105  *
106  * Reverses the effect of usb_hcd_ppc_soc_probe().
107  * It is always called from a thread
108  * context, normally "rmmod", "apmd", or something similar.
109  *
110  */
111 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
112                 struct platform_device *pdev)
113 {
114         usb_remove_hcd(hcd);
115
116         pr_debug("stopping PPC-SOC USB Controller\n");
117
118         iounmap(hcd->regs);
119         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
120         usb_put_hcd(hcd);
121 }
122
123 static int __devinit
124 ohci_ppc_soc_start(struct usb_hcd *hcd)
125 {
126         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
127         int             ret;
128
129         if ((ret = ohci_init(ohci)) < 0)
130                 return ret;
131
132         if ((ret = ohci_run(ohci)) < 0) {
133                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
134                 ohci_stop(hcd);
135                 return ret;
136         }
137
138         return 0;
139 }
140
141 static const struct hc_driver ohci_ppc_soc_hc_driver = {
142         .description =          hcd_name,
143         .hcd_priv_size =        sizeof(struct ohci_hcd),
144
145         /*
146          * generic hardware linkage
147          */
148         .irq =                  ohci_irq,
149         .flags =                HCD_USB11 | HCD_MEMORY,
150
151         /*
152          * basic lifecycle operations
153          */
154         .start =                ohci_ppc_soc_start,
155         .stop =                 ohci_stop,
156         .shutdown =             ohci_shutdown,
157
158         /*
159          * managing i/o requests and associated device resources
160          */
161         .urb_enqueue =          ohci_urb_enqueue,
162         .urb_dequeue =          ohci_urb_dequeue,
163         .endpoint_disable =     ohci_endpoint_disable,
164
165         /*
166          * scheduling support
167          */
168         .get_frame_number =     ohci_get_frame,
169
170         /*
171          * root hub support
172          */
173         .hub_status_data =      ohci_hub_status_data,
174         .hub_control =          ohci_hub_control,
175 #ifdef  CONFIG_PM
176         .bus_suspend =          ohci_bus_suspend,
177         .bus_resume =           ohci_bus_resume,
178 #endif
179         .start_port_reset =     ohci_start_port_reset,
180 };
181
182 static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
183 {
184         int ret;
185
186         if (usb_disabled())
187                 return -ENODEV;
188
189         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
190         return ret;
191 }
192
193 static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
194 {
195         struct usb_hcd *hcd = platform_get_drvdata(pdev);
196
197         usb_hcd_ppc_soc_remove(hcd, pdev);
198         return 0;
199 }
200
201 static struct platform_driver ohci_hcd_ppc_soc_driver = {
202         .probe          = ohci_hcd_ppc_soc_drv_probe,
203         .remove         = ohci_hcd_ppc_soc_drv_remove,
204         .shutdown       = usb_hcd_platform_shutdown,
205 #ifdef  CONFIG_PM
206         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
207         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
208 #endif
209         .driver         = {
210                 .name   = "ppc-soc-ohci",
211                 .owner  = THIS_MODULE,
212         },
213 };
214
215 MODULE_ALIAS("platform:ppc-soc-ohci");