From patchwork Sat Oct 22 22:05:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benoit Maurin X-Patchwork-Id: 617582 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99EE4C04A95 for ; Sat, 22 Oct 2022 22:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229799AbiJVWFi (ORCPT ); Sat, 22 Oct 2022 18:05:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229615AbiJVWFg (ORCPT ); Sat, 22 Oct 2022 18:05:36 -0400 Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A37BF5972A; Sat, 22 Oct 2022 15:05:35 -0700 (PDT) Received: by mail-wr1-x436.google.com with SMTP id bu30so10052824wrb.8; Sat, 22 Oct 2022 15:05:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=G2Not6vWEj/EXAhyq7bMF/7ChA29esth2VpSlZbgOZw=; b=SFQVJESBnmW6WPrWGvgWwUJTgDxkoKS9I29HLdL1dIwy/11LEof4cFph9B4UheCBrA E/AAwP1ioFmAXRunR1+tgc49nCu5bHEQZ0WvGwRxx8loQRXSWszOLO5B4+aijp1xal/e Kf0t4+MV7qN6IOSWd7nKcry+IADtnntty3fZLnyZ2e96JFjlf5cblU7fONB5wlIBwh8E ULklPni6rloZGNw8laDCdTk50TtfMAlHZSKEz1IRGG6QhsOGjJF0aEZpEeBW5AQ+BmsV 2x/uqyeb+0CE/uCDvF2u5wN9e2XVTcpo/lHqrAiRYFzG3WhQGb3d/O4zFFqKsDb77guc 4rHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=G2Not6vWEj/EXAhyq7bMF/7ChA29esth2VpSlZbgOZw=; b=f/S6XsQyAwDu2lUYNuVw0+iWusl7Q9zKDAXFS0lWCEX06XirLSXIkq/Oug0G7EGmG9 PhXQQCIAZun5jm/ixtn/mSP/OEfhNFXTME5Tt2HBRey269LHgW3liATQnjJgA0Ir2rAO 0YlAumu3GNr0kJnRlz4CyYmtXbT4YFXdEEiSG2BPu1o6mzv93OpLoggtDWqpla9ZftTl BFDPyN1vcGfoTeOlGrHu8lMWalx0/SfpfSof+5Cjs2kUq7PpTcVtDVv7RhwfZPtC214r cCWICe9F+b3Wdi0xVBaP9hctBZ35hgR1hej5o9CSAYA1Bw+9suNkllMxs+IH1D8ie4uo JYiQ== X-Gm-Message-State: ACrzQf2fbsGlK/w94GiW4DMuTQB7qs6yp5sN54lTx8CoAlpeLhhpiGWS QwgqsuY9aMI73IihRml30cV+FlNEILRbUg== X-Google-Smtp-Source: AMsMyM6nZYjAQAh4Z5ESRtpk0ycubeRqy+oXlHNqX/IMvXXWPLoA0vsIK9tjOIFqvFlWt6heAcuBfw== X-Received: by 2002:a05:6000:1051:b0:22e:5d8a:d3d5 with SMTP id c17-20020a056000105100b0022e5d8ad3d5mr16321206wrx.476.1666476334126; Sat, 22 Oct 2022 15:05:34 -0700 (PDT) Received: from localhost.localdomain (37.94.131.77.rev.sfr.net. [77.131.94.37]) by smtp.gmail.com with ESMTPSA id bv16-20020a0560001f1000b0022e6f0d0d7csm26825100wrb.18.2022.10.22.15.05.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 22 Oct 2022 15:05:33 -0700 (PDT) From: Benoit Maurin Cc: Benoit Maurin , Dmitry Torokhov , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] input/xpad: LED controllable through input events Date: Sun, 23 Oct 2022 00:05:07 +0200 Message-Id: <20221022220508.37489-1-maurinbe@gmail.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org (EV_LED, LED_MISC, #VALUE) can now be used to control leds on the xpad gamepad (was only possible through /sys/class/leds/xpad0/brightness) with permissions of /dev/input/xxx To test the code (xpad can be compiled out-of-tree with some slight tweaks): ``` import evdev device = evdev.InputDevice('/dev/input/event15') # not js0 device.set_led(8, 2) device.set_led(8, 0) # this won't be delivered device.set_led(8, 16) # must do this instead device.set_led(8, 15) ``` Signed-off-by: Benoit Maurin --- drivers/input/joystick/xpad.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c index 2959d80f7..fcf4d2c8f 100644 --- a/drivers/input/joystick/xpad.c +++ b/drivers/input/joystick/xpad.c @@ -1646,6 +1646,7 @@ static int xpad_led_probe(struct usb_xpad *xpad) goto err_free_mem; } + input_set_capability(xpad->dev, EV_LED, LED_MISC); snprintf(led->name, sizeof(led->name), "xpad%d", xpad->pad_nr); led->xpad = xpad; @@ -1824,6 +1825,28 @@ static void xpad_deinit_input(struct usb_xpad *xpad) } } +static int xpad_event(struct input_dev *dev, unsigned int type, + unsigned int code, int value) +{ + struct usb_xpad *xpad = input_get_drvdata(dev); + + if (type != EV_LED || xpad->led == NULL) + return 0; + xpad_send_led_command(xpad, value); + xpad->led->led_cdev.brightness = value; + /* Bit clearing is necessary otherwise two events with + * different non-null values will deliver only the first one. + * To work around this, we clear the bit to indicate that the + * current value is zero. The downside is that events with zero + * value won't be delivered. It's not a big deal since a value of + * 16 can be sent which is the same as 0 + * See xpad_send_led_command, command %= 16 + */ + + clear_bit(code, xpad->dev->led); + return 0; +} + static int xpad_init_input(struct usb_xpad *xpad) { struct input_dev *input_dev; @@ -1851,6 +1874,7 @@ static int xpad_init_input(struct usb_xpad *xpad) input_dev->open = xpad_open; input_dev->close = xpad_close; } + input_dev->event = xpad_event; if (!(xpad->mapping & MAP_STICKS_TO_NULL)) { /* set up axes */