ohci-ppc-soc.c revision d413984ae936fad46678403b38d79c595e5aaafe 
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 */
31static 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_BIG_ENDIAN;
76	ohci_hcd_init(ohci);
77
78	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
79	if (retval == 0)
80		return retval;
81
82	pr_debug("Removing PPC-SOC USB Controller\n");
83
84	iounmap(hcd->regs);
85 err2:
86	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
87 err1:
88 	usb_put_hcd(hcd);
89	return retval;
90}
91
92
93/* may be called without controller electrically present */
94/* may be called with controller, bus, and devices active */
95
96/**
97 * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
98 * @pdev: USB Host Controller being removed
99 * Context: !in_interrupt()
100 *
101 * Reverses the effect of usb_hcd_ppc_soc_probe().
102 * It is always called from a thread
103 * context, normally "rmmod", "apmd", or something similar.
104 *
105 */
106static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
107		struct platform_device *pdev)
108{
109	usb_remove_hcd(hcd);
110
111	pr_debug("stopping PPC-SOC USB Controller\n");
112
113	iounmap(hcd->regs);
114	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
115	usb_put_hcd(hcd);
116}
117
118static int __devinit
119ohci_ppc_soc_start(struct usb_hcd *hcd)
120{
121	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
122	int		ret;
123
124	if ((ret = ohci_init(ohci)) < 0)
125		return ret;
126
127	if ((ret = ohci_run(ohci)) < 0) {
128		err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
129		ohci_stop(hcd);
130		return ret;
131	}
132
133	return 0;
134}
135
136static const struct hc_driver ohci_ppc_soc_hc_driver = {
137	.description =		hcd_name,
138	.hcd_priv_size =	sizeof(struct ohci_hcd),
139
140	/*
141	 * generic hardware linkage
142	 */
143	.irq =			ohci_irq,
144	.flags =		HCD_USB11 | HCD_MEMORY,
145
146	/*
147	 * basic lifecycle operations
148	 */
149	.start =		ohci_ppc_soc_start,
150	.stop =			ohci_stop,
151
152	/*
153	 * managing i/o requests and associated device resources
154	 */
155	.urb_enqueue =		ohci_urb_enqueue,
156	.urb_dequeue =		ohci_urb_dequeue,
157	.endpoint_disable =	ohci_endpoint_disable,
158
159	/*
160	 * scheduling support
161	 */
162	.get_frame_number =	ohci_get_frame,
163
164	/*
165	 * root hub support
166	 */
167	.hub_status_data =	ohci_hub_status_data,
168	.hub_control =		ohci_hub_control,
169	.hub_irq_enable =	ohci_rhsc_enable,
170#ifdef	CONFIG_PM
171	.bus_suspend =		ohci_bus_suspend,
172	.bus_resume =		ohci_bus_resume,
173#endif
174	.start_port_reset =	ohci_start_port_reset,
175};
176
177static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
178{
179	int ret;
180
181	if (usb_disabled())
182		return -ENODEV;
183
184	ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
185	return ret;
186}
187
188static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
189{
190	struct usb_hcd *hcd = platform_get_drvdata(pdev);
191
192	usb_hcd_ppc_soc_remove(hcd, pdev);
193	return 0;
194}
195
196static struct platform_driver ohci_hcd_ppc_soc_driver = {
197	.probe		= ohci_hcd_ppc_soc_drv_probe,
198	.remove		= ohci_hcd_ppc_soc_drv_remove,
199#ifdef	CONFIG_PM
200	/*.suspend	= ohci_hcd_ppc_soc_drv_suspend,*/
201	/*.resume	= ohci_hcd_ppc_soc_drv_resume,*/
202#endif
203	.driver		= {
204		.name	= "ppc-soc-ohci",
205		.owner	= THIS_MODULE,
206	},
207};
208
209static int __init ohci_hcd_ppc_soc_init(void)
210{
211	pr_debug(DRIVER_INFO " (PPC SOC)\n");
212	pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed),
213							sizeof(struct td));
214
215	return platform_driver_register(&ohci_hcd_ppc_soc_driver);
216}
217
218static void __exit ohci_hcd_ppc_soc_cleanup(void)
219{
220	platform_driver_unregister(&ohci_hcd_ppc_soc_driver);
221}
222
223module_init(ohci_hcd_ppc_soc_init);
224module_exit(ohci_hcd_ppc_soc_cleanup);
225