aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/misc/berry_charge.c
blob: 24e2dc3148a492d6b1adaf40a484b21717ae72bd (plain)
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
/*
 * USB BlackBerry charging module
 *
 * Copyright (C) 2007 Greg Kroah-Hartman <gregkh@suse.de>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License as
 *	published by the Free Software Foundation, version 2.
 *
 * Information on how to switch configs was taken by the bcharge.cc file
 * created by the barry.sf.net project.
 *
 * bcharge.cc has the following copyright:
 * 	Copyright (C) 2006, Net Direct Inc. (http://www.netdirect.ca/)
 * and is released under the GPLv2.
 *
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>

#define RIM_VENDOR		0x0fca
#define BLACKBERRY		0x0001
#define BLACKBERRY_PEARL_DUAL   0x0004
#define BLACKBERRY_PEARL        0x0006

static int debug;
static int pearl_dual_mode = 1;

#ifdef dbg
#undef dbg
#endif
#define dbg(dev, format, arg...)				\
	if (debug)						\
		dev_printk(KERN_DEBUG , dev , format , ## arg)

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(RIM_VENDOR, BLACKBERRY) },
	{ USB_DEVICE(RIM_VENDOR, BLACKBERRY_PEARL) },
	{ USB_DEVICE(RIM_VENDOR, BLACKBERRY_PEARL_DUAL) },
	{ },					/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);

static int magic_charge(struct usb_device *udev)
{
	char *dummy_buffer = kzalloc(2, GFP_KERNEL);
	int retval;

	if (!dummy_buffer)
		return -ENOMEM;

	/* send two magic commands and then set the configuration.  The device
	 * will then reset itself with the new power usage and should start
	 * charging. */

	/* Note, with testing, it only seems that the first message is really
	 * needed (at least for the 8700c), but to be safe, we emulate what
	 * other operating systems seem to be sending to their device.  We
	 * really need to get some specs for this device to be sure about what
	 * is going on here.
	 */
	dbg(&udev->dev, "Sending first magic command\n");
	retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 0xa5, 0xc0, 0, 1, dummy_buffer, 2, 100);
	if (retval != 2) {
		dev_err(&udev->dev, "First magic command failed: %d.\n",
			retval);
		goto exit;
	}

	dbg(&udev->dev, "Sending second magic command\n");
	retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 0xa2, 0x40, 0, 1, dummy_buffer, 0, 100);
	if (retval != 0) {
		dev_err(&udev->dev, "Second magic command failed: %d.\n",
			retval);
		goto exit;
	}

	dbg(&udev->dev, "Calling set_configuration\n");
	retval = usb_driver_set_configuration(udev, 1);
	if (retval)
		dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);

exit:
	kfree(dummy_buffer);
	return retval;
}

static int magic_dual_mode(struct usb_device *udev)
{
	char *dummy_buffer = kzalloc(2, GFP_KERNEL);
	int retval;

	if (!dummy_buffer)
		return -ENOMEM;

	/* send magic command so that the Blackberry Pearl device exposes
	 * two interfaces: both the USB mass-storage one and one which can
	 * be used for database access. */
	dbg(&udev->dev, "Sending magic pearl command\n");
	retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 0xa9, 0xc0, 1, 1, dummy_buffer, 2, 100);
	dbg(&udev->dev, "Magic pearl command returned %d\n", retval);

	dbg(&udev->dev, "Calling set_configuration\n");
	retval = usb_driver_set_configuration(udev, 1);
	if (retval)
		dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);

	kfree(dummy_buffer);
	return retval;
}

static int berry_probe(struct usb_interface *intf,
		       const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(intf);

	dbg(&udev->dev, "Power is set to %dmA\n",
	    udev->actconfig->desc.bMaxPower * 2);

	/* check the power usage so we don't try to enable something that is
	 * already enabled */
	if ((udev->actconfig->desc.bMaxPower * 2) == 500) {
		dbg(&udev->dev, "device is already charging, power is "
		    "set to %dmA\n", udev->actconfig->desc.bMaxPower * 2);
		return -ENODEV;
	}

	/* turn the power on */
	magic_charge(udev);

	if ((le16_to_cpu(udev->descriptor.idProduct) == BLACKBERRY_PEARL) &&
	    (pearl_dual_mode))
		magic_dual_mode(udev);

	/* we don't really want to bind to the device, userspace programs can
	 * handle the syncing just fine, so get outta here. */
	return -ENODEV;
}

static void berry_disconnect(struct usb_interface *intf)
{
}

static struct usb_driver berry_driver = {
	.name =		"berry_charge",
	.probe =	berry_probe,
	.disconnect =	berry_disconnect,
	.id_table =	id_table,
};

static int __init berry_init(void)
{
	return usb_register(&berry_driver);
}

static void __exit berry_exit(void)
{
	usb_deregister(&berry_driver);
}

module_init(berry_init);
module_exit(berry_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
module_param(pearl_dual_mode, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(pearl_dual_mode, "Change Blackberry Pearl to run in dual mode");