From patchwork Wed May 31 09:06:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 13261804 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 549BAC77B73 for ; Wed, 31 May 2023 09:07:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235371AbjEaJHb (ORCPT ); Wed, 31 May 2023 05:07:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235365AbjEaJHL (ORCPT ); Wed, 31 May 2023 05:07:11 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E3C811F for ; Wed, 31 May 2023 02:06:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685524007; x=1717060007; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=c/JuZQvsOgu6fNUXzZIxfUlMVnOZgbAEkfTDL2JUfo4=; b=AXKkHG2iGCPntQfhpM4CJbBqp/fKhzpizTja+FgJapshomnKT6byy6G8 a698Fg1zhZwUfBAMgRPvYknrm3IZdhNutg8hHIsu4sP4r6ORx/tiwRNzm SfrvLqBLP6laqHjE1bpinTBXwvDGBgIPqKSN5uzD9RZ+nmMbJnJvR65Uk 9vu7cpVm2ITpvzaQ9eWEpAUldmrxYyQo0N31fikvNXxxhLcQ9QWadU6Ia 0mH6vDTqTG2rEiNCHl+zOIzG77AXYvQjdgN/qSZevBIaIoOkQzIaIHq88 psx2k8n7Vnr7v6U27+2n+P7iOl4VIlktrFsqmBKMktloS0Y+4B6ca1dQV g==; X-IronPort-AV: E=McAfee;i="6600,9927,10726"; a="354027619" X-IronPort-AV: E=Sophos;i="6.00,205,1681196400"; d="scan'208";a="354027619" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 May 2023 02:06:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10726"; a="657247206" X-IronPort-AV: E=Sophos;i="6.00,205,1681196400"; d="scan'208";a="657247206" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga003.jf.intel.com with ESMTP; 31 May 2023 02:06:40 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id 11ACC5E2; Wed, 31 May 2023 12:06:46 +0300 (EEST) From: Mika Westerberg To: linux-usb@vger.kernel.org Cc: Yehezkel Bernat , Michael Jamet , Lukas Wunner , Andreas Noever , Gil Fine , Christian Kellner , Mika Westerberg Subject: [PATCH 03/20] thunderbolt: Identify USB4 v2 routers Date: Wed, 31 May 2023 12:06:28 +0300 Message-Id: <20230531090645.5573-4-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230531090645.5573-1-mika.westerberg@linux.intel.com> References: <20230531090645.5573-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Gil Fine Update tb_switch_is_usb4() to support version 2 routers and add a new function usb4_switch_version() that can be used to figure out the spec version of the router. Update the uevent accordingly. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg --- drivers/thunderbolt/switch.c | 5 +++-- drivers/thunderbolt/tb.h | 15 ++++++++++++++- drivers/thunderbolt/tb_regs.h | 4 ++-- 3 files changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 47961afdcc73..3a1fc3e053f6 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -2056,8 +2056,9 @@ static int tb_switch_uevent(const struct device *dev, struct kobj_uevent_env *en const struct tb_switch *sw = tb_to_switch(dev); const char *type; - if (sw->config.thunderbolt_version == USB4_VERSION_1_0) { - if (add_uevent_var(env, "USB4_VERSION=1.0")) + if (tb_switch_is_usb4(sw)) { + if (add_uevent_var(env, "USB4_VERSION=%u.0", + usb4_switch_version(sw))) return -ENOMEM; } diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 2bda2816ff47..e27fcdf50581 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -955,7 +955,8 @@ static inline bool tb_switch_is_tiger_lake(const struct tb_switch *sw) */ static inline bool tb_switch_is_usb4(const struct tb_switch *sw) { - return sw->config.thunderbolt_version == USB4_VERSION_1_0; + return FIELD_GET(USB4_VERSION_MAJOR_MASK, + sw->config.thunderbolt_version) > 0; } /** @@ -1198,6 +1199,18 @@ static inline struct tb_retimer *tb_to_retimer(struct device *dev) return NULL; } +/** + * usb4_switch_version() - Returns USB4 version of the router + * @sw: Router to check + * + * Returns major version of USB4 router (%1 for v1, %2 for v2 and so + * on). Can be called to pre-USB4 router too and in that case returns %0. + */ +static inline unsigned int usb4_switch_version(const struct tb_switch *sw) +{ + return FIELD_GET(USB4_VERSION_MAJOR_MASK, sw->config.thunderbolt_version); +} + int usb4_switch_setup(struct tb_switch *sw); int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid); int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf, diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h index 2636423748cd..0716d6b7701a 100644 --- a/drivers/thunderbolt/tb_regs.h +++ b/drivers/thunderbolt/tb_regs.h @@ -190,8 +190,8 @@ struct tb_regs_switch_header { u32 thunderbolt_version:8; } __packed; -/* USB4 version 1.0 */ -#define USB4_VERSION_1_0 0x20 +/* Used with the router thunderbolt_version */ +#define USB4_VERSION_MAJOR_MASK GENMASK(7, 5) #define ROUTER_CS_1 0x01 #define ROUTER_CS_4 0x04