From patchwork Wed Nov 23 07:48:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 13053216 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 A7C4DC433FE for ; Wed, 23 Nov 2022 07:52:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236430AbiKWHwR (ORCPT ); Wed, 23 Nov 2022 02:52:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236403AbiKWHvZ (ORCPT ); Wed, 23 Nov 2022 02:51:25 -0500 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2EC1BFBAAB for ; Tue, 22 Nov 2022 23:50:28 -0800 (PST) Received: by mail-pf1-x434.google.com with SMTP id b29so16596474pfp.13 for ; Tue, 22 Nov 2022 23:50:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=glMEmrKRq4os3IrGzZuvFW519vUHu5A1N8n6PQVGzlQ=; b=BOIqJRhDIjAKXMdP0E72f+a3Mm553ME26QYgvjzRlnw5V6BDIRXLMaF1se86tGbYQB ZKJSBLv7ClSBzIHeOGPty5hmKbwaBrkAZyu5V7cAXRjG5/gkyz6zJVwZsudzNbC9l4sX xGxB/hxYu0PBYiO+yoCyjYeMiJMGg99bn5EY+aEng7GPz83FRjYFs/kI3QkayzRoFvhW wfs9iSr4xEj+gPjd1lE6V0ENFCIGqFFvmzEws69pHbHcVtxSZqsQQo4soZY0JUzY4sMe KDFqmpqix67JN0Z5Q/X7RLjj2iVbNpbHIil8wCaS62qxF0o21h88N9YOigHsix7vCpN1 62LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=glMEmrKRq4os3IrGzZuvFW519vUHu5A1N8n6PQVGzlQ=; b=iNwm6t0mAj/jxvtrkBuNjTIUFA+pGGXXQVx6ioMWtT1GDQhpJcOKM0QTEtgiD+s96z beUVFP4vOk9fzXDfhzScA6S/z5FocgRW8FLW58JiY/AakRhjH4rpc5T94HXmUsJmj4h9 HPiUYYIrM3SbkyFNrApjoVzhbp51zhLFNOpg9vvf8GNY/cYgsukFOELLezNpg0/nAGIi iZO9EjVZKKPggPX6XWIJ8b2Hjf1VaUvASku7QzG4V43N8yDq6iyZXbYY7yYE1BDfBo5v 1jSxRfE/325/Ic4epxT4xcu9yJl5ozgHoXBJ8/MaIVnWpWeZkU1/CaBfWrD7SheQPXZV OklA== X-Gm-Message-State: ANoB5pl1ZOIPjEmXGpnGwSZyLUTtEqUIr9p9LqIrjIelHleSkXZ1CVJ4 sgKud8v7JX65xRPXrF+q3drG X-Google-Smtp-Source: AA0mqf6lPAF5IEkGpX+K2Q9GKm/yZZjproyXopeEaYdMDy/lg31urXcP7Dnn38GSLO1N23qo/ycyeA== X-Received: by 2002:a63:5359:0:b0:46f:3dfb:87e1 with SMTP id t25-20020a635359000000b0046f3dfb87e1mr9010367pgl.290.1669189827640; Tue, 22 Nov 2022 23:50:27 -0800 (PST) Received: from localhost.localdomain ([117.202.191.0]) by smtp.gmail.com with ESMTPSA id s16-20020a170902a51000b001869f2120a5sm13334059plq.34.2022.11.22.23.50.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Nov 2022 23:50:26 -0800 (PST) From: Manivannan Sadhasivam To: martin.petersen@oracle.com, jejb@linux.ibm.com, andersson@kernel.org, vkoul@kernel.org Cc: quic_cang@quicinc.com, quic_asutoshd@quicinc.com, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-scsi@vger.kernel.org, dmitry.baryshkov@linaro.org, ahalaney@redhat.com, abel.vesa@linaro.org, Manivannan Sadhasivam Subject: [PATCH v3 19/20] scsi: ufs: ufs-qcom: Add support for finding max gear on new platforms Date: Wed, 23 Nov 2022 13:18:25 +0530 Message-Id: <20221123074826.95369-20-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221123074826.95369-1-manivannan.sadhasivam@linaro.org> References: <20221123074826.95369-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Starting from Qcom UFS version 4.0, vendor specific REG_UFS_PARAM0 register can be used to determine the maximum gear supported by the controller. Reviewed-by: Andrew Halaney Signed-off-by: Manivannan Sadhasivam --- drivers/ufs/host/ufs-qcom.c | 2 ++ drivers/ufs/host/ufs-qcom.h | 4 ++++ 2 files changed, 6 insertions(+) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 3efef2f36e69..607fddb7b4c3 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -291,6 +291,8 @@ static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba) * Hence downgrade the maximum supported gear to HS-G2. */ return UFS_HS_G2; + } else if (host->hw_ver.major >= 0x4) { + return UFS_QCOM_MAX_GEAR(ufshcd_readl(hba, REG_UFS_PARAM0)); } /* Default is HS-G3 */ diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 4b00c67e9d7f..dd3abd23ec22 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -94,6 +94,10 @@ enum { #define TMRLUT_HW_CGC_EN BIT(6) #define OCSC_HW_CGC_EN BIT(7) +/* bit definitions for REG_UFS_PARAM0 */ +#define MAX_HS_GEAR_MASK GENMASK(6, 4) +#define UFS_QCOM_MAX_GEAR(x) FIELD_GET(MAX_HS_GEAR_MASK, (x)) + /* bit definition for UFS_UFS_TEST_BUS_CTRL_n */ #define TEST_BUS_SUB_SEL_MASK GENMASK(4, 0) /* All XXX_SEL fields are 5 bits wide */