tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * USB BlackBerry charging module
3 *
4 * Copyright (C) 2007 Greg Kroah-Hartman <gregkh@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2.
9 *
10 * Information on how to switch configs was taken by the bcharge.cc file
11 * created by the barry.sf.net project.
12 *
13 * bcharge.cc has the following copyright:
14 * Copyright (C) 2006, Net Direct Inc. (http://www.netdirect.ca/)
15 * and is released under the GPLv2.
16 *
17 *
18 */
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/init.h>
23#include <linux/slab.h>
24#include <linux/module.h>
25#include <linux/usb.h>
26
27#define RIM_VENDOR 0x0fca
28#define BLACKBERRY 0x0001
29#define BLACKBERRY_PEARL_DUAL 0x0004
30#define BLACKBERRY_PEARL 0x0006
31
32static int debug;
33static int pearl_dual_mode = 1;
34
35#ifdef dbg
36#undef dbg
37#endif
38#define dbg(dev, format, arg...) \
39 if (debug) \
40 dev_printk(KERN_DEBUG , dev , format , ## arg)
41
42static struct usb_device_id id_table [] = {
43 { USB_DEVICE(RIM_VENDOR, BLACKBERRY) },
44 { USB_DEVICE(RIM_VENDOR, BLACKBERRY_PEARL) },
45 { USB_DEVICE(RIM_VENDOR, BLACKBERRY_PEARL_DUAL) },
46 { }, /* Terminating entry */
47};
48MODULE_DEVICE_TABLE(usb, id_table);
49
50static int magic_charge(struct usb_device *udev)
51{
52 char *dummy_buffer = kzalloc(2, GFP_KERNEL);
53 int retval;
54
55 if (!dummy_buffer)
56 return -ENOMEM;
57
58 /* send two magic commands and then set the configuration. The device
59 * will then reset itself with the new power usage and should start
60 * charging. */
61
62 /* Note, with testing, it only seems that the first message is really
63 * needed (at least for the 8700c), but to be safe, we emulate what
64 * other operating systems seem to be sending to their device. We
65 * really need to get some specs for this device to be sure about what
66 * is going on here.
67 */
68 dbg(&udev->dev, "Sending first magic command\n");
69 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
70 0xa5, 0xc0, 0, 1, dummy_buffer, 2, 100);
71 if (retval != 2) {
72 dev_err(&udev->dev, "First magic command failed: %d.\n",
73 retval);
74 goto exit;
75 }
76
77 dbg(&udev->dev, "Sending second magic command\n");
78 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
79 0xa2, 0x40, 0, 1, dummy_buffer, 0, 100);
80 if (retval != 0) {
81 dev_err(&udev->dev, "Second magic command failed: %d.\n",
82 retval);
83 goto exit;
84 }
85
86 dbg(&udev->dev, "Calling set_configuration\n");
87 retval = usb_driver_set_configuration(udev, 1);
88 if (retval)
89 dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
90
91exit:
92 kfree(dummy_buffer);
93 return retval;
94}
95
96static int magic_dual_mode(struct usb_device *udev)
97{
98 char *dummy_buffer = kzalloc(2, GFP_KERNEL);
99 int retval;
100
101 if (!dummy_buffer)
102 return -ENOMEM;
103
104 /* send magic command so that the Blackberry Pearl device exposes
105 * two interfaces: both the USB mass-storage one and one which can
106 * be used for database access. */
107 dbg(&udev->dev, "Sending magic pearl command\n");
108 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
109 0xa9, 0xc0, 1, 1, dummy_buffer, 2, 100);
110 dbg(&udev->dev, "Magic pearl command returned %d\n", retval);
111
112 dbg(&udev->dev, "Calling set_configuration\n");
113 retval = usb_driver_set_configuration(udev, 1);
114 if (retval)
115 dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
116
117 kfree(dummy_buffer);
118 return retval;
119}
120
121static int berry_probe(struct usb_interface *intf,
122 const struct usb_device_id *id)
123{
124 struct usb_device *udev = interface_to_usbdev(intf);
125
126 dbg(&udev->dev, "Power is set to %dmA\n",
127 udev->actconfig->desc.bMaxPower * 2);
128
129 /* check the power usage so we don't try to enable something that is
130 * already enabled */
131 if ((udev->actconfig->desc.bMaxPower * 2) == 500) {
132 dbg(&udev->dev, "device is already charging, power is "
133 "set to %dmA\n", udev->actconfig->desc.bMaxPower * 2);
134 return -ENODEV;
135 }
136
137 /* turn the power on */
138 magic_charge(udev);
139
140 if ((le16_to_cpu(udev->descriptor.idProduct) == BLACKBERRY_PEARL) &&
141 (pearl_dual_mode))
142 magic_dual_mode(udev);
143
144 /* we don't really want to bind to the device, userspace programs can
145 * handle the syncing just fine, so get outta here. */
146 return -ENODEV;
147}
148
149static void berry_disconnect(struct usb_interface *intf)
150{
151}
152
153static struct usb_driver berry_driver = {
154 .name = "berry_charge",
155 .probe = berry_probe,
156 .disconnect = berry_disconnect,
157 .id_table = id_table,
158};
159
160static int __init berry_init(void)
161{
162 return usb_register(&berry_driver);
163}
164
165static void __exit berry_exit(void)
166{
167 usb_deregister(&berry_driver);
168}
169
170module_init(berry_init);
171module_exit(berry_exit);
172
173MODULE_LICENSE("GPL");
174MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
175module_param(debug, bool, S_IRUGO | S_IWUSR);
176MODULE_PARM_DESC(debug, "Debug enabled or not");
177module_param(pearl_dual_mode, bool, S_IRUGO | S_IWUSR);
178MODULE_PARM_DESC(pearl_dual_mode, "Change Blackberry Pearl to run in dual mode");