774f78cf3b
I was testing the berry_charge module with my Blackberry 8700c and had great success, thanks. Looking at the code for my own learning I noticed the following cut and paste error... just a nit. Signed-off-by: Ken L Johnson <ken@novell.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/*
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* USB BlackBerry charging module
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*
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* Copyright (C) 2007 Greg Kroah-Hartman <gregkh@suse.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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* Information on how to switch configs was taken by the bcharge.cc file
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* created by the barry.sf.net project.
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*
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* bcharge.cc has the following copyright:
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* Copyright (C) 2006, Net Direct Inc. (http://www.netdirect.ca/)
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* and is released under the GPLv2.
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*
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#define RIM_VENDOR 0x0fca
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#define BLACKBERRY 0x0001
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static int debug;
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#ifdef dbg
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#undef dbg
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#endif
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#define dbg(dev, format, arg...) \
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if (debug) \
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dev_printk(KERN_DEBUG , dev , format , ## arg)
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(RIM_VENDOR, BLACKBERRY) },
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{ }, /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static int magic_charge(struct usb_device *udev)
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{
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char *dummy_buffer = kzalloc(2, GFP_KERNEL);
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int retval;
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if (!dummy_buffer)
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return -ENOMEM;
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/* send two magic commands and then set the configuration. The device
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* will then reset itself with the new power usage and should start
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* charging. */
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/* Note, with testing, it only seems that the first message is really
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* needed (at least for the 8700c), but to be safe, we emulate what
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* other operating systems seem to be sending to their device. We
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* really need to get some specs for this device to be sure about what
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* is going on here.
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*/
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dbg(&udev->dev, "Sending first magic command\n");
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retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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0xa5, 0xc0, 0, 1, dummy_buffer, 2, 100);
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if (retval != 2) {
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dev_err(&udev->dev, "First magic command failed: %d.\n",
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retval);
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return retval;
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}
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dbg(&udev->dev, "Sending second magic command\n");
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retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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0xa2, 0x40, 0, 1, dummy_buffer, 0, 100);
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if (retval != 0) {
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dev_err(&udev->dev, "Second magic command failed: %d.\n",
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retval);
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return retval;
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}
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dbg(&udev->dev, "Calling set_configuration\n");
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retval = usb_driver_set_configuration(udev, 1);
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if (retval)
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dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
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return retval;
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}
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static int berry_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct usb_device *udev = interface_to_usbdev(intf);
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dbg(&udev->dev, "Power is set to %dmA\n",
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udev->actconfig->desc.bMaxPower * 2);
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/* check the power usage so we don't try to enable something that is
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* already enabled */
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if ((udev->actconfig->desc.bMaxPower * 2) == 500) {
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dbg(&udev->dev, "device is already charging, power is "
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"set to %dmA\n", udev->actconfig->desc.bMaxPower * 2);
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return -ENODEV;
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}
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/* turn the power on */
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magic_charge(udev);
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/* we don't really want to bind to the device, userspace programs can
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* handle the syncing just fine, so get outta here. */
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return -ENODEV;
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}
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static void berry_disconnect(struct usb_interface *intf)
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{
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}
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static struct usb_driver berry_driver = {
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.name = "berry_charge",
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.probe = berry_probe,
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.disconnect = berry_disconnect,
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.id_table = id_table,
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};
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static int __init berry_init(void)
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{
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return usb_register(&berry_driver);
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}
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static void __exit berry_exit(void)
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{
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usb_deregister(&berry_driver);
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}
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module_init(berry_init);
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module_exit(berry_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
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module_param(debug, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Debug enabled or not");
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