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