From patchwork Wed Aug 23 15:44:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nitin Rawat X-Patchwork-Id: 13362791 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 EE084EE49B8 for ; Wed, 23 Aug 2023 15:44:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237187AbjHWPoh (ORCPT ); Wed, 23 Aug 2023 11:44:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236915AbjHWPod (ORCPT ); Wed, 23 Aug 2023 11:44:33 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1A18E52; Wed, 23 Aug 2023 08:44:31 -0700 (PDT) Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37NEHeJ6013972; Wed, 23 Aug 2023 15:44:25 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=mxLnWqg8kkjXmafled9O2djMlAf1ASq5PIxHzOV6VpI=; b=mRkfkGVQX7mXEYURLEg5LFMksxzQP9Ce3gWpLQoWYcVPA1FCPmZZ5F+Z/6f9Wgq2KumU NXyKZyXBbH1IkKoasCaCcAZO2n128ahrdcORMuna8B1PUxHUTZmQ0w1UGpVPcLTbx7a5 Mv0AAWGBJ8Wo4oDSt0LVDJ3OuysLrzzB2bx/BPXFFcrLNbEiLxD1t5zYLioMlxCTFDM8 xGK/WP171bA/OmP4dEz/rk54MaYWSS9dL5OwdrlPcVBB2B/ZgL55oRjDdDh07jMWGW5+ 08CvX7DdHPpALBf7Wwim7YKuekk8sXcXFH/9hjaZzPzR90TDnjtIsQXuNE7v5PYkO4cI Ag== Received: from apblrppmta01.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3sn2ext9nx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Aug 2023 15:44:24 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 37NFiHdM029208; Wed, 23 Aug 2023 15:44:21 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3sjptm3qef-1; Wed, 23 Aug 2023 15:44:21 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 37NFiL3C029260; Wed, 23 Aug 2023 15:44:21 GMT Received: from hu-maiyas-hyd.qualcomm.com (hu-nitirawa-hyd.qualcomm.com [10.213.109.152]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 37NFiL7t029258; Wed, 23 Aug 2023 15:44:21 +0000 Received: by hu-maiyas-hyd.qualcomm.com (Postfix, from userid 2342877) id D4C815000AB; Wed, 23 Aug 2023 21:14:20 +0530 (+0530) From: Nitin Rawat To: mani@kernel.org, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: quic_cang@quicinc.com, quic_nguyenb@quicinc.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Nitin Rawat , Naveen Kumar Goud Arepalli Subject: [PATCH V5 6/6] scsi: ufs: qcom: Handle unipro clk HW division based on scaling conditions. Date: Wed, 23 Aug 2023 21:14:13 +0530 Message-Id: <20230823154413.23788-7-quic_nitirawa@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230823154413.23788-1-quic_nitirawa@quicinc.com> References: <20230823154413.23788-1-quic_nitirawa@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Kirj_zTWA4LwA0501zrxRg7O_SwvA2bC X-Proofpoint-ORIG-GUID: Kirj_zTWA4LwA0501zrxRg7O_SwvA2bC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-23_09,2023-08-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxlogscore=999 mlxscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=0 adultscore=0 phishscore=0 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2308230142 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Configure internal HW division of unipro core_clk based on scale up and scale down condition. This bit should be cleared before entering any SVS mode as per hardware specification. Co-developed-by: Naveen Kumar Goud Arepalli Signed-off-by: Naveen Kumar Goud Arepalli Signed-off-by: Nitin Rawat --- drivers/ufs/host/ufs-qcom.c | 49 ++++++++++++++++++++----------------- drivers/ufs/host/ufs-qcom.h | 2 +- 2 files changed, 27 insertions(+), 24 deletions(-) -- 2.17.1 diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 82cf3ac4193a..d886e28b8a2a 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -95,7 +95,8 @@ static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS]; static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host); static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, u32 clk_cycles, - u32 clk_40ns_cycles); + u32 clk_40ns_cycles, + bool scale_up); static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd) { @@ -700,19 +701,19 @@ static int ufs_qcom_cfg_core_clk_ctrl(struct ufs_hba *hba) switch (max_freq) { case MHZ_403: - err = ufs_qcom_set_core_clk_ctrl(hba, 403, 16); + err = ufs_qcom_set_core_clk_ctrl(hba, 403, 16, true); break; case MHZ_300: - err = ufs_qcom_set_core_clk_ctrl(hba, 300, 12); + err = ufs_qcom_set_core_clk_ctrl(hba, 300, 12, true); break; case MHZ_201_5: - err = ufs_qcom_set_core_clk_ctrl(hba, 202, 8); + err = ufs_qcom_set_core_clk_ctrl(hba, 202, 8, true); break; case MHZ_150: - err = ufs_qcom_set_core_clk_ctrl(hba, 150, 6); + err = ufs_qcom_set_core_clk_ctrl(hba, 150, 6, true); break; case MHZ_100: - err = ufs_qcom_set_core_clk_ctrl(hba, 100, 4); + err = ufs_qcom_set_core_clk_ctrl(hba, 100, 4, true); break; default: dev_err(hba->dev, "unipro max_freq=%u entry missing\n", max_freq); @@ -1352,7 +1353,8 @@ static void ufs_qcom_exit(struct ufs_hba *hba) static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, u32 clk_1us_cycles, - u32 clk_40ns_cycles) + u32 clk_40ns_cycles, + bool scale_up) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); u32 mask = DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK; @@ -1378,18 +1380,20 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, core_clk_ctrl_reg &= ~(mask << offset); core_clk_ctrl_reg |= clk_1us_cycles << offset; - /* Clear CORE_CLK_DIV_EN */ - core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; + if (scale_up) + core_clk_ctrl_reg |= CORE_CLK_DIV_EN_BIT; err = ufshcd_dme_set(hba, - UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), - core_clk_ctrl_reg); + UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), + core_clk_ctrl_reg); + if (err) + return err; /* * UFS host controller V4.0.0 onwards needs to program * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed * frequency of unipro core clk of UFS host controller. */ - if (!err && (host->hw_ver.major >= 4)) { + if (host->hw_ver.major >= 4) { if (clk_40ns_cycles > PA_VS_CORE_CLK_40NS_CYCLES_MASK) return -EINVAL; @@ -1442,22 +1446,21 @@ static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); int err; - u32 core_clk_ctrl_reg; + u32 reg; if (!ufs_qcom_cap_qunipro(host)) return 0; - err = ufshcd_dme_get(hba, - UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), - &core_clk_ctrl_reg); + err = ufshcd_dme_get(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), ®); + if (err) + return err; /* make sure CORE_CLK_DIV_EN is cleared */ - if (!err && - (core_clk_ctrl_reg & DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT)) { - core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; + if (reg & CORE_CLK_DIV_EN_BIT) { + reg &= ~CORE_CLK_DIV_EN_BIT; err = ufshcd_dme_set(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), - core_clk_ctrl_reg); + reg); } return err; @@ -1488,13 +1491,13 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) } switch (curr_freq) { case MHZ_37_5: - err = ufs_qcom_set_core_clk_ctrl(hba, 38, 2); + err = ufs_qcom_set_core_clk_ctrl(hba, 38, 2, false); break; case MHZ_75: - err = ufs_qcom_set_core_clk_ctrl(hba, 75, 3); + err = ufs_qcom_set_core_clk_ctrl(hba, 75, 3, false); break; case MHZ_100: - err = ufs_qcom_set_core_clk_ctrl(hba, 100, 4); + err = ufs_qcom_set_core_clk_ctrl(hba, 100, 4, false); break; default: err = -EINVAL; diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 56550fd36c4e..6e8eb4bb9247 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -140,7 +140,7 @@ enum { /* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */ #define MAX_CORE_CLK_1US_CYCLES_MASK_V4 0xFFF #define MAX_CORE_CLK_1US_CYCLES_OFFSET_V4 0x10 -#define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT BIT(8) +#define CORE_CLK_DIV_EN_BIT BIT(8) #define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK 0xFF #define PA_VS_CORE_CLK_40NS_CYCLES 0x9007 #define PA_VS_CORE_CLK_40NS_CYCLES_MASK 0x3F