From mboxrd@z Thu Jan 1 00:00:00 1970 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 710EBC7EE2E for ; Sun, 7 May 2023 00:38:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232089AbjEGAiA (ORCPT ); Sat, 6 May 2023 20:38:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231991AbjEGAhe (ORCPT ); Sat, 6 May 2023 20:37:34 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8F3AA2269D; Sat, 6 May 2023 17:36:00 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8912961530; Sun, 7 May 2023 00:35:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27CDDC433D2; Sun, 7 May 2023 00:35:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1683419732; bh=qthCPBfY2wP7lOEL6UkdVpBSLFAuLbFQlXttDAI38ac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OsBggR233qDq7X+DSbY1etz82d3+/wQr7cVZ0nJ+LZMj4GrEAzZ3hu+8PjgIKEs9P Mcl0UurodUefCymilvxsBybnaLrk6/BX5IveneX29XkYMH2n+O3H738U335gV8h9O7 vDrWhPvWq+kKKljlYCK6FCgty5C0Y5dpL5St2S7iz+i6Uq2x/2AKnCVaj/BayAZXM5 YZPzwr85C9PgvJRov1bvga0h0HYJkvWVg7HW1Zu8MZb+jNXK1hR6YaMHmcAVUFyPZS MCQjbVInaHaQOhZdeF5cYUE2tP/exEB88PN8zG3iv0WKXypu60gL9ATyEL5I6pYzEx +pA4Q9EVwlQDg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bastien Nocera , Benjamin Tissoires , Sasha Levin , jikos@kernel.org, linux-input@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 04/10] HID: logitech-hidpp: Don't use the USB serial for USB devices Date: Sat, 6 May 2023 20:35:10 -0400 Message-Id: <20230507003517.4078384-4-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230507003517.4078384-1-sashal@kernel.org> References: <20230507003517.4078384-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bastien Nocera [ Upstream commit 7ad1fe0da0fa91bf920b79ab05ae97bfabecc4f4 ] For devices that support the 0x0003 feature (Device Information) version 4, set the serial based on the output of that feature, rather than relying on the usbhid code setting the USB serial. This should allow the serial when connected through USB to (nearly) match the one when connected through a unifying receiver. For example, on the serials on a G903 wired/wireless mouse: - Unifying: 4067-e8-ce-cd-45 - USB before patch: 017C385C3837 - USB after patch: c086-e8-ce-cd-45 Signed-off-by: Bastien Nocera Link: https://lore.kernel.org/r/20230302130117.3975-1-hadess@hadess.net Signed-off-by: Benjamin Tissoires Signed-off-by: Sasha Levin --- drivers/hid/hid-logitech-hidpp.c | 51 ++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 601ab673727dc..5eb25812e9479 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -928,6 +928,55 @@ static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp) return 0; } +/* -------------------------------------------------------------------------- */ +/* 0x0003: Device Information */ +/* -------------------------------------------------------------------------- */ + +#define HIDPP_PAGE_DEVICE_INFORMATION 0x0003 + +#define CMD_GET_DEVICE_INFO 0x00 + +static int hidpp_get_serial(struct hidpp_device *hidpp, u32 *serial) +{ + struct hidpp_report response; + u8 feature_type; + u8 feature_index; + int ret; + + ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_DEVICE_INFORMATION, + &feature_index, + &feature_type); + if (ret) + return ret; + + ret = hidpp_send_fap_command_sync(hidpp, feature_index, + CMD_GET_DEVICE_INFO, + NULL, 0, &response); + if (ret) + return ret; + + /* See hidpp_unifying_get_serial() */ + *serial = *((u32 *)&response.rap.params[1]); + return 0; +} + +static int hidpp_serial_init(struct hidpp_device *hidpp) +{ + struct hid_device *hdev = hidpp->hid_dev; + u32 serial; + int ret; + + ret = hidpp_get_serial(hidpp, &serial); + if (ret) + return ret; + + snprintf(hdev->uniq, sizeof(hdev->uniq), "%04x-%4phD", + hdev->product, &serial); + dbg_hid("HID++ DeviceInformation: Got serial: %s\n", hdev->uniq); + + return 0; +} + /* -------------------------------------------------------------------------- */ /* 0x0005: GetDeviceNameType */ /* -------------------------------------------------------------------------- */ @@ -4141,6 +4190,8 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) if (hidpp->quirks & HIDPP_QUIRK_UNIFYING) hidpp_unifying_init(hidpp); + else if (hid_is_usb(hidpp->hid_dev)) + hidpp_serial_init(hidpp); connected = hidpp_root_get_protocol_version(hidpp) == 0; atomic_set(&hidpp->connected, connected); -- 2.39.2