From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754363Ab1A0Kf6 (ORCPT ); Thu, 27 Jan 2011 05:35:58 -0500 Received: from 89-230.252-81.static-ip.oleane.fr ([81.252.230.89]:33431 "EHLO smtp.lii-enac.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754108Ab1A0Kf5 (ORCPT ); Thu, 27 Jan 2011 05:35:57 -0500 From: Benjamin Tissoires To: Dmitry Torokhov , Henrik Rydberg , Ping Cheng , Benjamin Tissoires , Jiri Kosina , Chris Bagwell , Rafi Rubin , Stephane Chatty , Peter Hutterer , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC 1/2] input: mt: Add method to extract the MT slot state Date: Thu, 27 Jan 2011 11:35:46 +0100 Message-Id: <1296124547-3323-2-git-send-email-benjamin.tissoires@enac.fr> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1296124547-3323-1-git-send-email-benjamin.tissoires@enac.fr> References: <1296124547-3323-1-git-send-email-benjamin.tissoires@enac.fr> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds the function input_mt_get_abs_value(), which may be used to extract the current state of the MT slots. Signed-off-by: Henrik Rydberg Signed-off-by: Benjamin Tissoires --- drivers/input/input-mt.c | 32 ++++++++++++++++++++++++++++++++ include/linux/input/mt.h | 1 + 2 files changed, 33 insertions(+), 0 deletions(-) diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index c48c81f..5b95e38 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -168,3 +168,35 @@ void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count) } } EXPORT_SYMBOL(input_mt_report_pointer_emulation); + +/** + * input_mt_get_absinfo - retrieve MT state variables from a device slot + * @dev: input device which state is being queried + * @code: ABS code to retrieve + * @slot: slot to retrieve from + * + * Return the ABS state of the given MT slot. If code is not an MT + * event, the corresponding ABS event is returned. + * + * This function may be called by anyone interested in extracting the + * current MT state. Used by evdev handlers. + */ +struct input_absinfo input_mt_get_absinfo(struct input_dev *dev, unsigned int code, int slot) +{ + unsigned int mtmap = code > ABS_MT_FIRST ? code - ABS_MT_FIRST : 0; + unsigned long flags; + struct input_absinfo retval; + + spin_lock_irqsave(&dev->event_lock, flags); + if (!mtmap) + retval = dev->absinfo[code]; + else if (slot >= 0 && slot < dev->mtsize) { + retval = dev->absinfo[code]; + retval.value = dev->mt[slot].abs[mtmap]; + } else + retval.value = 0; + spin_unlock_irqrestore(&dev->event_lock, flags); + + return retval; +} +EXPORT_SYMBOL(input_mt_get_absinfo); diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h index b3ac06a..a71a27f 100644 --- a/include/linux/input/mt.h +++ b/include/linux/input/mt.h @@ -54,4 +54,5 @@ void input_mt_report_slot_state(struct input_dev *dev, void input_mt_report_finger_count(struct input_dev *dev, int count); void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count); +struct input_absinfo input_mt_get_absinfo(struct input_dev *dev, unsigned int code, int slot); #endif -- 1.7.3.4