On Mon, May 18, 2009 at 04:36:40PM -0500, Mario Limonciello wrote: > Dell BT adapters will startup in a HID mode. In HID mode two logical > USB devices are exposed, a mouse and a keyboard. If properly set, the > BT radio will work with pre-paired keyboards or mice in this mode. This > is useful for things like BIOS control via a BT keyboard. A command is > sent to one of the descriptors of the mouse to cause the device to > transition to HCI mode. When transitioned to HCI mode, a radio device > is exposed allowing it to pair and operate with any BT device. > > Here's what the utility looks like that ships with bluez: > http://git.kernel.org/?p=bluetooth/bluez.git;a=blob;f=tools/hid2hci.c;h=11d707fd76e940b884c9078907ab1504cd7350d4;hb=HEAD > Look at the switch_dell method to see how it works. > > Currently, this is implemented via a set of udev rules shipped with > bluez that match the Dell device and transition it to HCI mode. > Here's the udev rule that matches: > ACTION=="add", ENV{ID_VENDOR}=="413c", ENV{ID_CLASS}=="mouse", ATTRS{bmAttributes}=="e0", KERNEL=="mouse*", RUN+="/usr/sbin/hid2hci --method dell -v $env{ID_VENDOR} -p $env{ID_MODEL} --mode hci" > > When coming out of S3 if the killswitch isn't activated, the logical USB > mouse isn't coldplugged again preventing the udev rule from being > matched upon. You can manually run hid2hci and the device will switch > modes. Ok. I don't think the right way to implement this is forcing dell-laptop to simulate an unplug. The HCI driver should be responsible for saving and restoring state of the device in its suspend/resume method. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
