From df23fa01acc77444453633e1dec59cd7a4ea8ec3 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Sat, 13 Jan 2007 10:57:42 -0800 Subject: USB: Driver to charge USB blackberry devices A simple driver to turn on the charging capability of a USB BlackBerry device when it is plugged into the machine. It does not bind to the device, so all userspace programs can still sync properly with it. Note, if CONFIG_USB_SUSPEND is enabled, it can play havoc with this device as the power to the port will be shut down. This device id will have to be added to the global blacklist table when it is created. Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/berry_charge.c | 140 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 140 insertions(+) create mode 100644 drivers/usb/misc/berry_charge.c (limited to 'drivers/usb/misc/berry_charge.c') diff --git a/drivers/usb/misc/berry_charge.c b/drivers/usb/misc/berry_charge.c new file mode 100644 index 000000000000..60893c6c8221 --- /dev/null +++ b/drivers/usb/misc/berry_charge.c @@ -0,0 +1,140 @@ +/* + * USB BlackBerry charging module + * + * Copyright (C) 2007 Greg Kroah-Hartman + * + * 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 +#include +#include +#include +#include +#include + +#define RIM_VENDOR 0x0fca +#define BLACKBERRY 0x0001 + +static int debug; + +#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) }, + { }, /* 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); + return retval; + } + + dbg(&udev->dev, "Sending first 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); + return 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); + + 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); + + /* 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 "); +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug enabled or not"); -- cgit v1.2.1 From 774f78cf3b81c553c087ca0e8740e9cd779df578 Mon Sep 17 00:00:00 2001 From: Ken L Johnson Date: Fri, 16 Mar 2007 10:17:31 -0600 Subject: USB: berry_charge: correct dbg string for second magic command 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/berry_charge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb/misc/berry_charge.c') diff --git a/drivers/usb/misc/berry_charge.c b/drivers/usb/misc/berry_charge.c index 60893c6c8221..b15f2fd8dab4 100644 --- a/drivers/usb/misc/berry_charge.c +++ b/drivers/usb/misc/berry_charge.c @@ -69,7 +69,7 @@ static int magic_charge(struct usb_device *udev) return retval; } - dbg(&udev->dev, "Sending first magic command\n"); + 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) { -- cgit v1.2.1