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
32 static int debug;
33 static 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
42 static 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 };
48 MODULE_DEVICE_TABLE(usb, id_table);
49
50 static 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
91 exit:
92 kfree(dummy_buffer);
93 return retval;
94 }
95
96 static 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
121 static 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 if (udev->bus_mA < 500) {
127 dbg(&udev->dev, "Not enough power to charge available\n");
128 return -ENODEV;
129 }
130
131 dbg(&udev->dev, "Power is set to %dmA\n",
132 udev->actconfig->desc.bMaxPower * 2);
133
134 /* check the power usage so we don't try to enable something that is
135 * already enabled */
136 if ((udev->actconfig->desc.bMaxPower * 2) == 500) {
137 dbg(&udev->dev, "device is already charging, power is "
138 "set to %dmA\n", udev->actconfig->desc.bMaxPower * 2);
139 return -ENODEV;
140 }
141
142 /* turn the power on */
143 magic_charge(udev);
144
145 if ((le16_to_cpu(udev->descriptor.idProduct) == BLACKBERRY_PEARL) &&
146 (pearl_dual_mode))
147 magic_dual_mode(udev);
148
149 /* we don't really want to bind to the device, userspace programs can
150 * handle the syncing just fine, so get outta here. */
151 return -ENODEV;
152 }
153
154 static void berry_disconnect(struct usb_interface *intf)
155 {
156 }
157
158 static struct usb_driver berry_driver = {
159 .name = "berry_charge",
160 .probe = berry_probe,
161 .disconnect = berry_disconnect,
162 .id_table = id_table,
163 };
164
165 static int __init berry_init(void)
166 {
167 return usb_register(&berry_driver);
168 }
169
170 static void __exit berry_exit(void)
171 {
172 usb_deregister(&berry_driver);
173 }
174
175 module_init(berry_init);
176 module_exit(berry_exit);
177
178 MODULE_LICENSE("GPL");
179 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
180 module_param(debug, bool, S_IRUGO | S_IWUSR);
181 MODULE_PARM_DESC(debug, "Debug enabled or not");
182 module_param(pearl_dual_mode, bool, S_IRUGO | S_IWUSR);
183 MODULE_PARM_DESC(pearl_dual_mode, "Change Blackberry Pearl to run in dual mode");
184
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