From patchwork Sun Feb 7 21:48:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roderick Colenbrander X-Patchwork-Id: 378227 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 625EDC433E6 for ; Sun, 7 Feb 2021 21:50:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 269BD64E31 for ; Sun, 7 Feb 2021 21:50:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229510AbhBGVt5 (ORCPT ); Sun, 7 Feb 2021 16:49:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229537AbhBGVt4 (ORCPT ); Sun, 7 Feb 2021 16:49:56 -0500 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 018FEC061786 for ; Sun, 7 Feb 2021 13:49:16 -0800 (PST) Received: by mail-pg1-x533.google.com with SMTP id r38so8949133pgk.13 for ; Sun, 07 Feb 2021 13:49:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gaikai-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Eo5PpXmuhOqJQes14kJibQrKqKs7EZV7Rp6IbsTqi4Q=; b=Vg8k8iwE/Q4uCd5Em/ysbAfS1Hd6+8k/7f0avzopPNzKSZtmeXQ7NJqBF5SMzZbM+9 kj9ZcC2TvxOX1v26TPN8lP8v3/3nyw4ugQNK1g8PqknB17LJb+wqEkd13wmEbEwfUNQa +dkS21e+tS4ccmb/C72GL9XKIrsVHUmZWpkyfXJqbiAQb0FxZkFRURbW7V2b8MxgWLfN K8CRKtHirSizBci4CBt/suz/pT54OiwGdmMVpgU0clUlHN22YFPvM/9LWmHU4d1l7cEk fAVfnzzQ3JFMppODpXX0vAaXkp9T29sMkSRzQzt1mpHbFjeHuU61WqyC3aVW7REfXmNn qXRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Eo5PpXmuhOqJQes14kJibQrKqKs7EZV7Rp6IbsTqi4Q=; b=Yg20q+ZviSN3H7ml+pi62WiCfx4G5zJnvH1pBL9lV1X+HHKYxtR4+f6mo+Q6cd0bKX JEUrUbUsVUhbeAD2cSZ/bVFyaFvnDMGmUmLx+lJiwbAFFtyLsbkCCuoBqSQ/De2JBOk0 Ju91XZkSFtN4DGtin2KDN+PP0CB6t4JaKXS6KmFE8tBNFC3XupXAVcrYvLFRJovS8oAW A5hsB5h2Ovw2e0jsTj1JGP02PtLqUjjysvJwCuompKqLijYylbfnNz7dHmnrTVCpTAmw ULyKVqr5p2RvqMqz+y35u8ULPVwrbHC99HrNG538IXEKInsAMu0Pjcqx1WQSb64AMg2l KDfw== X-Gm-Message-State: AOAM533Y57B+v62QfzDT/vsrJslQy0IJIwEnHm/g85LixtOeB2ZB8H7w e3Wxf4s60V61cfv6WlYBahi5iQ== X-Google-Smtp-Source: ABdhPJw3+dpKVezC7Zq1YjFolcF4zAOFPOObcISl+rnax1ofmfBbDup1Tf/r+bB9uwEFovj8KrfPdQ== X-Received: by 2002:a63:cd08:: with SMTP id i8mr14294686pgg.425.1612734555595; Sun, 07 Feb 2021 13:49:15 -0800 (PST) Received: from us8c16456344dc.lan (cpe-76-87-77-78.socal.res.rr.com. [76.87.77.78]) by smtp.gmail.com with ESMTPSA id a141sm16578991pfa.189.2021.02.07.13.49.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Feb 2021 13:49:15 -0800 (PST) From: Roderick Colenbrander To: Jiri Kosina , Benjamin Tissoires Cc: linux-input@vger.kernel.org, Chris Ye , =?utf-8?q?Bar?= =?utf-8?b?bmFiw6FzIFDFkWN6ZQ==?= , =?utf-8?q?Samuel_=C4=8Cavoj?= , =?utf-8?q?Florian_M=C3=A4rkl?= , Roderick Colenbrander Subject: [PATCH v6 02/13] HID: playstation: use DualSense MAC address as unique identifier. Date: Sun, 7 Feb 2021 13:48:57 -0800 Message-Id: <20210207214908.79573-3-roderick@gaikai.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210207214908.79573-1-roderick@gaikai.com> References: <20210207214908.79573-1-roderick@gaikai.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Roderick Colenbrander Use the DualSense MAC address as a unique identifier for the HID device. Signed-off-by: Roderick Colenbrander --- drivers/hid/hid-playstation.c | 58 +++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c index 7d4171a89322..aca49637ef2f 100644 --- a/drivers/hid/hid-playstation.c +++ b/drivers/hid/hid-playstation.c @@ -20,6 +20,7 @@ /* Base class for playstation devices. */ struct ps_device { struct hid_device *hdev; + uint8_t mac_address[6]; /* Note: stored in little endian order. */ int (*parse_report)(struct ps_device *dev, struct hid_report *report, u8 *data, int size); }; @@ -27,6 +28,9 @@ struct ps_device { #define DS_INPUT_REPORT_USB 0x01 #define DS_INPUT_REPORT_USB_SIZE 64 +#define DS_FEATURE_REPORT_PAIRING_INFO 0x09 +#define DS_FEATURE_REPORT_PAIRING_INFO_SIZE 20 + /* Button masks for DualSense input report. */ #define DS_BUTTONS0_HAT_SWITCH GENMASK(3, 0) #define DS_BUTTONS0_SQUARE BIT(4) @@ -166,6 +170,53 @@ static struct input_dev *ps_gamepad_create(struct hid_device *hdev) return gamepad; } +static int ps_get_report(struct hid_device *hdev, uint8_t report_id, uint8_t *buf, size_t size) +{ + int ret; + + ret = hid_hw_raw_request(hdev, report_id, buf, size, HID_FEATURE_REPORT, + HID_REQ_GET_REPORT); + if (ret < 0) { + hid_err(hdev, "Failed to retrieve feature with reportID %d: %d\n", report_id, ret); + return ret; + } + + if (ret != size) { + hid_err(hdev, "Invalid byte count transferred, expected %zu got %d\n", size, ret); + return -EINVAL; + } + + if (buf[0] != report_id) { + hid_err(hdev, "Invalid reportID received, expected %d got %d\n", report_id, buf[0]); + return -EINVAL; + } + + return 0; +} + +static int dualsense_get_mac_address(struct dualsense *ds) +{ + uint8_t *buf; + int ret = 0; + + buf = kzalloc(DS_FEATURE_REPORT_PAIRING_INFO_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = ps_get_report(ds->base.hdev, DS_FEATURE_REPORT_PAIRING_INFO, buf, + DS_FEATURE_REPORT_PAIRING_INFO_SIZE); + if (ret) { + hid_err(ds->base.hdev, "Failed to retrieve DualSense pairing info: %d\n", ret); + goto err_free; + } + + memcpy(ds->base.mac_address, &buf[1], sizeof(ds->base.mac_address)); + +err_free: + kfree(buf); + return ret; +} + static int dualsense_parse_report(struct ps_device *ps_dev, struct hid_report *report, u8 *data, int size) { @@ -237,6 +288,13 @@ static struct ps_device *dualsense_create(struct hid_device *hdev) ds->base.parse_report = dualsense_parse_report; hid_set_drvdata(hdev, ds); + ret = dualsense_get_mac_address(ds); + if (ret) { + hid_err(hdev, "Failed to get MAC address from DualSense\n"); + return ERR_PTR(ret); + } + snprintf(hdev->uniq, sizeof(hdev->uniq), "%pMR", ds->base.mac_address); + ds->gamepad = ps_gamepad_create(hdev); if (IS_ERR(ds->gamepad)) { ret = PTR_ERR(ds->gamepad);