From: Jiri Kosina Date: Mon, 20 Aug 2007 10:13:34 +0000 (+0200) Subject: HID: Report usage codes of keys as EV_MSC scancode events X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=c01d50d181f074a60bf3ed54eb055ce1679afb98;p=deliverable%2Flinux.git HID: Report usage codes of keys as EV_MSC scancode events Current HID layer does not report usage codes to the input layer. This feature was previously removed, because it caused unnecessary storm of events in cases of positioning devices, etc. This patch adds reporting of usage codes as EV_MSC events only for key events. We issue the EV_MSC event only if the state of the key corresponding to the given code has changed, so that we don't report usages that are sent in every report even if the state hasn't changed (for example Shift/Caps Lock/... states as sent by various keyboards). This functionality is required at least by KeyTouch in order to provide convenient means for remapping the usage codes. Cc: Marvin Raaijmakers Signed-off-by: Jiri Kosina --- diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index f80b57142cd4..36be431888fb 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -921,6 +921,11 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel set_bit(KEY_VOLUMEDOWN, input->keybit); } + if (usage->type == EV_KEY) { + set_bit(EV_MSC, input->evbit); + set_bit(MSC_SCAN, input->mscbit); + } + hid_resolv_event(usage->type, usage->code); dbg_hid_line("\n"); @@ -1043,6 +1048,9 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct input_event(input, usage->type, last_key, 0); } } + /* report the usage code as scancode if the key status has changed */ + if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value) + input_event(input, EV_MSC, MSC_SCAN, usage->hid); input_event(input, usage->type, usage->code, value);