From patchwork Sun Jul 26 01:36:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thinh Nguyen X-Patchwork-Id: 11685399 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9570513B4 for ; Sun, 26 Jul 2020 01:36:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D3DF206D7 for ; Sun, 26 Jul 2020 01:36:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="JgJm4Bc7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727803AbgGZBgI (ORCPT ); Sat, 25 Jul 2020 21:36:08 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:50668 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726870AbgGZBgI (ORCPT ); Sat, 25 Jul 2020 21:36:08 -0400 Received: from mailhost.synopsys.com (sv1-mailhost2.synopsys.com [10.205.2.132]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 1FD2D40141; Sun, 26 Jul 2020 01:36:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1595727367; bh=In4vjXQYh/rtDxeA2nUouc6MthDzwKvSAUN2HxNn9iI=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=JgJm4Bc7HJHxAJZYsjQyzC355Ku3nPeXPhCR+kSjeG+LWGMqjbzsAC59DU0Wow7ym MiHo2C3UyfiC96RsvFCxxBokXQLLIPs3MwadIz4tAxn8FPJLLTzgdCO4G19m+qGe8N Fkk4wU1v4BI3BqNcG2Z60521z8y3WdstmPhZEbHaThLw87szUIiYOtNHe3bQCne6q1 r0c2uK7+syk6ltWEdUJJN2aQLUkoGJPY9HlW3Ku6zWsW4u4Ri21hUckP8ndSyEcbnR WowHoSAY2bUfmm3Bv0RTquTJlqJxuS58io+frJatRyq/Dr1ka6rk2CcU9C+oNdxuL8 8bBnDo7ul83VA== Received: from te-lab16 (nanobot.internal.synopsys.com [10.10.186.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailhost.synopsys.com (Postfix) with ESMTPSA id 07522A006F; Sun, 26 Jul 2020 01:36:06 +0000 (UTC) Received: by te-lab16 (sSMTP sendmail emulation); Sat, 25 Jul 2020 18:36:05 -0700 Date: Sat, 25 Jul 2020 18:36:05 -0700 Message-Id: In-Reply-To: References: X-SNPS-Relay: synopsys.com From: Thinh Nguyen Subject: [PATCH v4 02/12] usb: gadget: composite: Avoid using magic numbers To: Felipe Balbi , Greg Kroah-Hartman , Thinh Nguyen , linux-usb@vger.kernel.org Cc: John Youn Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Magic numbers are difficult to read. Use macros for super-speed-plus BOS descriptor attributes in the composite driver. They're self-documented. So there's no need to provide comments as we did previously for the magic numbers. Signed-off-by: Thinh Nguyen --- Changes in v4: - None Changes in v3: - None Changes in v2: - None drivers/usb/gadget/composite.c | 41 ++++++++++++++++++++--------------------- 1 file changed, 20 insertions(+), 21 deletions(-) diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 05b176c82cc5..0aa4cb49aa53 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -743,32 +744,30 @@ static int bos_desc(struct usb_composite_dev *cdev) ssp_cap->bReserved = 0; ssp_cap->wReserved = 0; - /* SSAC = 1 (2 attributes) */ - ssp_cap->bmAttributes = cpu_to_le32(1); + ssp_cap->bmAttributes = + cpu_to_le32(FIELD_PREP(USB_SSP_SUBLINK_SPEED_ATTRIBS, 1) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_IDS, 0)); - /* Min RX/TX Lane Count = 1 */ ssp_cap->wFunctionalitySupport = - cpu_to_le16((1 << 8) | (1 << 12)); + cpu_to_le16(FIELD_PREP(USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID, 0) | + FIELD_PREP(USB_SSP_MIN_RX_LANE_COUNT, 1) | + FIELD_PREP(USB_SSP_MIN_TX_LANE_COUNT, 1)); - /* - * bmSublinkSpeedAttr[0]: - * ST = Symmetric, RX - * LSE = 3 (Gbps) - * LP = 1 (SuperSpeedPlus) - * LSM = 10 (10 Gbps) - */ ssp_cap->bmSublinkSpeedAttr[0] = - cpu_to_le32((3 << 4) | (1 << 14) | (0xa << 16)); - /* - * bmSublinkSpeedAttr[1] = - * ST = Symmetric, TX - * LSE = 3 (Gbps) - * LP = 1 (SuperSpeedPlus) - * LSM = 10 (10 Gbps) - */ + cpu_to_le32(FIELD_PREP(USB_SSP_SUBLINK_SPEED_SSID, 0) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSE, USB_LSE_GBPS) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST, + USB_ST_SYMMETRIC_RX) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_LP, USB_LP_SSP) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSM, 10)); + ssp_cap->bmSublinkSpeedAttr[1] = - cpu_to_le32((3 << 4) | (1 << 14) | - (0xa << 16) | (1 << 7)); + cpu_to_le32(FIELD_PREP(USB_SSP_SUBLINK_SPEED_SSID, 0) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSE, USB_LSE_GBPS) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST, + USB_ST_SYMMETRIC_TX) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_LP, USB_LP_SSP) | + FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSM, 10)); } return le16_to_cpu(bos->wTotalLength);