summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/ohci-pnx8550.c
blob: 605d59cba28e79d46bbbb3215cfc9ccd1b6f6a5b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 * (C) Copyright 2005 Embedded Alley Solutions, Inc.
 *
 * Bus Glue for PNX8550
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
 * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for LH7A404 from ohci-sa1111.c
 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
 *
 * Modified for PNX8550 from ohci-sa1111.c and sa-omap.c
 *  by Vitaly Wool <vitalywool@gmail.com>
 *
 * This file is licenced under the GPL.
 */

#include <linux/device.h>
#include <linux/platform_device.h>
#include <asm/mach-pnx8550/usb.h>
#include <asm/mach-pnx8550/int.h>
#include <asm/mach-pnx8550/pci.h>

#ifndef CONFIG_PNX8550
#error "This file is PNX8550 bus glue.  CONFIG_PNX8550 must be defined."
#endif

extern int usb_disabled(void);

/*-------------------------------------------------------------------------*/

static void pnx8550_start_hc(struct platform_device *dev)
{
	/*
	 * Set register CLK48CTL to enable and 48MHz
	 */
	outl(0x00000003, PCI_BASE | 0x0004770c);

	/*
	 * Set register CLK12CTL to enable and 48MHz
	 */
	outl(0x00000003, PCI_BASE | 0x00047710);

	udelay(100);
}

static void pnx8550_stop_hc(struct platform_device *dev)
{
	udelay(10);
}


/*-------------------------------------------------------------------------*/

/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */


/**
 * usb_hcd_pnx8550_probe - initialize pnx8550-based HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it
 * through the hotplug entry's driver_data.
 *
 */
int usb_hcd_pnx8550_probe (const struct hc_driver *driver,
			  struct platform_device *dev)
{
	int retval;
	struct usb_hcd *hcd;

	if (dev->resource[0].flags != IORESOURCE_MEM ||
			dev->resource[1].flags != IORESOURCE_IRQ) {
		dev_err (&dev->dev,"invalid resource type\n");
		return -ENOMEM;
	}

	hcd = usb_create_hcd (driver, &dev->dev, "pnx8550");
	if (!hcd)
		return -ENOMEM;
	hcd->rsrc_start = dev->resource[0].start;
	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] "
				"failed\n", hcd->rsrc_start, hcd->rsrc_len);
		retval = -EBUSY;
		goto err1;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n",
				hcd->rsrc_start, hcd->rsrc_len);
		retval = -ENOMEM;
		goto err2;
	}

	pnx8550_start_hc(dev);

	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
	if (retval == 0)
		return retval;

	pnx8550_stop_hc(dev);
	iounmap(hcd->regs);
 err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
	usb_put_hcd(hcd);
	return retval;
}


/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */

/**
 * usb_hcd_pnx8550_remove - shutdown processing for pnx8550-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_pnx8550_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
 */
void usb_hcd_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev)
{
	usb_remove_hcd(hcd);
	pnx8550_stop_hc(dev);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

/*-------------------------------------------------------------------------*/

static int __devinit
ohci_pnx8550_start (struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	int		ret;

	ohci_dbg (ohci, "ohci_pnx8550_start, ohci:%p", ohci);

	if ((ret = ohci_init(ohci)) < 0)
		return ret;

	if ((ret = ohci_run (ohci)) < 0) {
		err ("can't start %s", hcd->self.bus_name);
		ohci_stop (hcd);
		return ret;
	}

	return 0;
}

/*-------------------------------------------------------------------------*/

static const struct hc_driver ohci_pnx8550_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"PNX8550 OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_pnx8550_start,
	.stop =			ohci_stop,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ohci_hub_status_data,
	.hub_control =		ohci_hub_control,
	.hub_irq_enable =	ohci_rhsc_enable,
#ifdef	CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

/*-------------------------------------------------------------------------*/

static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev)
{
	int ret;

	if (usb_disabled())
		return -ENODEV;

	ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);
	return ret;
}

static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_hcd_pnx8550_remove(hcd, pdev);
	return 0;
}

MODULE_ALIAS("platform:pnx8550-ohci");

static struct platform_driver ohci_hcd_pnx8550_driver = {
	.driver = {
		.name	= "pnx8550-ohci",
		.owner	= THIS_MODULE,
	},
	.probe		= ohci_hcd_pnx8550_drv_probe,
	.remove		= ohci_hcd_pnx8550_drv_remove,
};