From patchwork Fri Sep 1 11:42:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nitin Rawat X-Patchwork-Id: 13372443 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 E3756CA0FE8 for ; Fri, 1 Sep 2023 11:43:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349225AbjIALnL (ORCPT ); Fri, 1 Sep 2023 07:43:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231205AbjIALnE (ORCPT ); Fri, 1 Sep 2023 07:43:04 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5375B5; Fri, 1 Sep 2023 04:43:01 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 381A0Csi019941; Fri, 1 Sep 2023 11:42:53 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=/LDI4xbTTZJEZhw8SQsuXul4NtFZ4wMk1vLaQ+gPH08=; b=Q2EQKFUrJfL0Kkqmn2h/dwBMaA+D+Ez13uHUiiwVILs+eKiE16nHl10ne6xulNEgKJwj XGJIS7usEcZjbdL1M/WZYVREnqXPMwdxid0o1J9m6NvcjokDl4XHMyV4yPF7mg960Q/3 1cSDkivjBiH/+oIQ/fu4LysJCOcTEbIHexM8mhuiZlHZITpnjqMLjwjtDfvYIBK4jR7d c/cqlz6yc7c9jZNsY1vczJgHPrB1SroU4tNt2ozbcXXBy3s9yD57WSiFo0103ykdbMY7 pyB5+H0XohdCJWbh8urvVwWH2s+aJJNID5YuYSAyvFAHE4sMB4qBGb0V7tp/DAtSOKbI bQ== 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 3stv5nawxe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Sep 2023 11:42:53 +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 381BgnHv013946; Fri, 1 Sep 2023 11:42:49 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3sqafmj043-1; Fri, 01 Sep 2023 11:42:49 +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 381BgnNi013941; Fri, 1 Sep 2023 11:42:49 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 381BgnHO013940; Fri, 01 Sep 2023 11:42:49 +0000 Received: by hu-maiyas-hyd.qualcomm.com (Postfix, from userid 2342877) id E44985006A6; Fri, 1 Sep 2023 17:12:48 +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 V6 2/6] scsi: ufs: qcom: Configure PA_VS_CORE_CLK_40NS_CYCLES Date: Fri, 1 Sep 2023 17:12:38 +0530 Message-Id: <20230901114242.31219-3-quic_nitirawa@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230901114242.31219-1-quic_nitirawa@quicinc.com> References: <20230901114242.31219-1-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: 8sHP9734E5S5QmK6GgQWATXr9xMC_F9x X-Proofpoint-ORIG-GUID: 8sHP9734E5S5QmK6GgQWATXr9xMC_F9x 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=2023-09-01_09,2023-08-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 mlxlogscore=999 spamscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 bulkscore=0 impostorscore=0 mlxscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309010109 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Configure PA_VS_CORE_CLK_40NS_CYCLES with frequency of unipro core clk for Qualcomm UFS controller V4.0 and onwards to align with the 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 | 47 ++++++++++++++++++++++++++++--------- drivers/ufs/host/ufs-qcom.h | 2 ++ 2 files changed, 38 insertions(+), 11 deletions(-) -- 2.17.1 diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index fe36003faaa8..018e391c276e 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -93,8 +93,9 @@ static const struct __ufs_qcom_bw_table { 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_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba, - u32 clk_cycles); +static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, + u32 clk_cycles, + u32 clk_40ns_cycles); static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd) { @@ -690,8 +691,8 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba, * set unipro core clock cycles to 150 & clear clock * divider */ - err = ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, - 150); + err = ufs_qcom_set_core_clk_ctrl(hba, + 150, 6); /* * Some UFS devices (and may be host) have issues if LCC is @@ -1295,12 +1296,12 @@ static void ufs_qcom_exit(struct ufs_hba *hba) phy_power_off(host->generic_phy); phy_exit(host->generic_phy); } - -static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba, - u32 cycles_in_1us) +static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, + u32 cycles_in_1us, + u32 cycles_in_40ns) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - u32 core_clk_ctrl_reg; + u32 core_clk_ctrl_reg, reg; int ret; ret = ufshcd_dme_get(hba, @@ -1325,9 +1326,33 @@ static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba, /* Clear CORE_CLK_DIV_EN */ core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; - return ufshcd_dme_set(hba, + err = ufshcd_dme_set(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), core_clk_ctrl_reg); + /* + * 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 (cycles_in_40ns > PA_VS_CORE_CLK_40NS_CYCLES_MASK) + return -EINVAL; + + err = ufshcd_dme_get(hba, + UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), + ®); + if (err) + return err; + + reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK; + reg |= cycles_in_40ns; + + err = ufshcd_dme_set(hba, + UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), + reg); + } + + return err; } static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba) @@ -1344,7 +1369,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba) return 0; /* set unipro core clock cycles to 150 and clear clock divider */ - return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 150); + return ufs_qcom_set_core_clk_ctrl(hba, 150, 6); } static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba) @@ -1380,7 +1405,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) return 0; /* set unipro core clock cycles to 75 and clear clock divider */ - return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 75); + return ufs_qcom_set_core_clk_ctrl(hba, 75, 3); } static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 8a9d3dbec297..d81bf1a1b77a 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -132,6 +132,8 @@ enum { #define CLK_1US_CYCLES_MASK_V4 GENMASK(27, 16) #define CLK_1US_CYCLES_MASK GENMASK(7, 0) #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT BIT(8) +#define PA_VS_CORE_CLK_40NS_CYCLES 0x9007 +#define PA_VS_CORE_CLK_40NS_CYCLES_MASK GENMASK(6, 0) static inline void ufs_qcom_get_controller_revision(struct ufs_hba *hba,