Re: [Bluez-devel] Writing a bluetooth mouse driver...

[Marcel Holtmann <marcel@holtmann.org>]

Hi Vojtech,

> > the problematic part is hid-core.c, because it contains the USB specific
> > transport layer. I ripped it off and included the rest into my HIDP code
> > and it works flawless. The Bluetooth transport code is almost ready. I
> > only need to include some workarounds for the stupid L2CAP disconnect
> > problems with some HID implementations, but this has nothing to do with
> > the HID parser.
> > 
> > Actually the HID parser is independent from the input and USB subsystem,
> > because you can use a Bluetooth transport and the hiddev interface for
> > reading and writing reports. What I have in mind is cleaning up the
> > current code and putting it under drivers/hid/ with this API:
> > 
> > 	struct hid_device {
> > 		...
> > 
> > 		void *driver_data;
> > 		int (*send)(struct hid_device *device, unsigned char *data, int size);
> > 	}
> > 
> > 	struct hid_device *hid_alloc_device(unsigned char *data, int size);
> > 	void hid_free_device(struct hid_device *device);
> > 	int hid_register_device(struct hid_device *device);
> > 	void hid_unregister_device(struct hid_device *device);
> > 	int hid_recv_report(struct hid_device *hid, int type, unsigned char *data, int size);
> 
> This is a very nice idea. I'm all for it. 

the problem that I see is that someone has to code it and I am not a
real HID parser expert. I want to add kernel side Bluetooth HID support
into 2.6.5 and at the moment I only see to choices:

1. I include my ripped hid-core.c and hid-input.c code along with my
HIDP code in net/bluetooth/hidp/

2. I build up a basic drivers/hid/ with limited functionality (only
input and no hiddev support) and the proposed API. The name of the
kernel module should be something like hid-ng.ko until we have a full
replacement for hid.ko.

Comments?

Regards

Marcel




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