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SubjectRe: [PATCH/RFC?] usb/input: Add support for fn key on Apple PowerBooks
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On Thu, 2006-01-12 at 00:26 +0100, Michael Hanselmann wrote:

> * This is the global environment of the parser. This information is
> @@ -431,6 +433,14 @@ struct hid_device { /* device repo
> void (*ff_exit)(struct hid_device*); /* Called by hid_exit_ff(hid) */
> int (*ff_event)(struct hid_device *hid, struct input_dev *input,
> unsigned int type, unsigned int code, int value);
> +
> +#ifdef CONFIG_USB_HIDINPUT_POWERBOOK
> + /* We do this here because it's only relevant for the
> + * USB devices, not for all input_dev's.
> + */
> + unsigned long pb_fn[NBITS(KEY_MAX)];
> + unsigned long pb_numlock[NBITS(KEY_MAX)];
> +#endif
> };

I don't understand the comment above ? You are adding this to all struct
hid_device ? There can be only one of those keyboards plugged at one
point in time, I don't think there is any problem having the above
static in the driver rather than in the hid_device structure.

.../...

>
> + if ((hid->quirks & HID_QUIRK_POWERBOOK_HAS_FN) &&
> + hidinput_pb_event(hid, input, usage, value)) {
> + return;
> + }
> +

Dimitry might disagree but it's generally considered bad taste to have
{ and } for a single statement :)

> if (usage->hat_min < usage->hat_max || usage->hat_dir) {
> int hat_dir = usage->hat_dir;
> if (!hat_dir)
> diff -upr linux-2.6.15.orig/drivers/usb/input/Kconfig linux-2.6.15/drivers/usb/input/Kconfig
> --- linux-2.6.15.orig/drivers/usb/input/Kconfig 2006-01-11 23:59:40.000000000 +0100
> +++ linux-2.6.15/drivers/usb/input/Kconfig 2006-01-08 11:53:35.000000000 +0100
> @@ -37,6 +37,16 @@ config USB_HIDINPUT
>
> If unsure, say Y.
>
> +config USB_HIDINPUT_POWERBOOK
> + bool "Enable support for iBook/PowerBook special keys"
> + default n
> + depends on USB_HIDINPUT
> + help
> + Say Y here if you want support for the special keys (Fn, Numlock) on
> + Apple iBooks and PowerBooks.
> +
> + If unsure, say N.
> +
> config HID_FF
> bool "Force feedback support (EXPERIMENTAL)"
> depends on USB_HIDINPUT && EXPERIMENTAL

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