From patchwork Thu Dec 1 17:43:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 630155 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 C16C9C47088 for ; Thu, 1 Dec 2022 17:48:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229515AbiLARsd (ORCPT ); Thu, 1 Dec 2022 12:48:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229708AbiLARrt (ORCPT ); Thu, 1 Dec 2022 12:47:49 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 01143BD416 for ; Thu, 1 Dec 2022 09:46:04 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id jl24so2320948plb.8 for ; Thu, 01 Dec 2022 09:46:04 -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=HfEJwN0vYVybfZ9YyTm6eBmcGL9HtCjfrKAQuwx/Vlk=; b=ITIGZHCi9cPswRmdxDZ6T83A0c6HKJ0ts/3XspYsfh/mGdC16YCB8MvDu0jwqM3zkl BV6SzOWQTIOFHKEBzEaaIfIXnsVezdtUlvrLVX1N2+t7ogMRlGN6pphE0PM3YO+ecZw/ DT8ZtU/76aNYNBXhTZ6uB5KZyU0GmYPrDNuy8IAqa/fBF9exALPccbhvJeE2Wm1/k7ch I9Zm45bnFKXsjPUDD3paMA0DW/6yy8FmLlKGv0vPwkXZY7VUjrMqapJcj6tdpY/eB2Vi WOJP6lx4eyunsLWU3AJzFr16BGTwaZ0YoPeE7VBRO8fAFC11590Sj2nRA7RJXD6hNQzG e+WQ== 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=HfEJwN0vYVybfZ9YyTm6eBmcGL9HtCjfrKAQuwx/Vlk=; b=EhqLdu/VcscfOlIC7H1A1gcdj5dIw8CRgb1DIP0yT6WFIK/in4Us5liSn9j+HOj7Bd HSnJSnVUXprKsrfNdLSgC3Iz4+EJU0mhoeFt7V8ZJUQB0eVLTFngjr2nMxXTpaPPk03z MEQBRwnR2dzfldVUtHMw+803U4h3Ytn3xLefrfPcTLy1YNiXVRz1azMQKD+agB8aMV/e mwFX/4eNBIwNPRQaEzI8pzFA1D2hrfANMiZPKJm5BgyI0n9wzl2C8XsCVJ4d/wIx0mWC cBSxPVh6oNQxNLaLGtl1gLyf7qp85R8ztI092PV+Pucg7oaeCDa4LqSzD5cMzwU7oYFg 036g== X-Gm-Message-State: ANoB5pl+/J2darXs7ggEONCyAwZg3t3EvY4Pt009ZIP5jauJem8GouO8 PmWzdDzpu84aY74vWNiR5Ir4 X-Google-Smtp-Source: AA0mqf7X2y4uCqcQwAP/5lxkylBmUsvwLff+iLprcgKo90LT16Br3DakEIn/3PQ6YtvSo/pznOihhQ== X-Received: by 2002:a17:902:dacd:b0:189:6889:c309 with SMTP id q13-20020a170902dacd00b001896889c309mr32201361plx.3.1669916764269; Thu, 01 Dec 2022 09:46:04 -0800 (PST) Received: from localhost.localdomain ([220.158.159.39]) by smtp.gmail.com with ESMTPSA id p4-20020a170902780400b0016d9b101413sm3898743pll.200.2022.12.01.09.45.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Dec 2022 09:46:03 -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, alim.akhtar@samsung.com, avri.altman@wdc.com, bvanassche@acm.org, Manivannan Sadhasivam Subject: [PATCH v4 21/23] scsi: ufs: ufs-qcom: Add support for reinitializing the UFS device Date: Thu, 1 Dec 2022 23:13:26 +0530 Message-Id: <20221201174328.870152-22-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221201174328.870152-1-manivannan.sadhasivam@linaro.org> References: <20221201174328.870152-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Starting from Qualcomm UFS version 4, the UFS device needs to be reinitialized after switching to maximum gear by the UFS core. Hence, add support for it by enabling the UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH quirk, implementing reinit_notify() callback and using the agreed gear speed for setting the PHY mode. Suggested-by: Can Guo Signed-off-by: Manivannan Sadhasivam --- drivers/ufs/host/ufs-qcom.c | 26 ++++++++++++++++++++++---- drivers/ufs/host/ufs-qcom.h | 2 ++ 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 919b6eae439d..3efef2f36e69 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -302,7 +302,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) struct ufs_qcom_host *host = ufshcd_get_variant(hba); struct phy *phy = host->generic_phy; int ret; - bool is_rate_B = UFS_QCOM_LIMIT_HS_RATE == PA_HS_MODE_B; /* Reset UFS Host Controller and PHY */ ret = ufs_qcom_host_reset(hba); @@ -310,9 +309,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) dev_warn(hba->dev, "%s: host reset returned %d\n", __func__, ret); - if (is_rate_B) - phy_set_mode(phy, PHY_MODE_UFS_HS_B); - /* phy initialization - calibrate the phy */ ret = phy_init(phy); if (ret) { @@ -321,6 +317,8 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) return ret; } + phy_set_mode_ext(phy, PHY_MODE_UFS_HS_B, host->hs_gear); + /* power on phy - start serdes and phy's power and clocks */ ret = phy_power_on(phy); if (ret) { @@ -723,6 +721,9 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, return ret; } + /* Use the agreed gear */ + host->hs_gear = dev_req_params->gear_tx; + /* enable the device ref clock before changing to HS mode */ if (!ufshcd_is_hs_mode(&hba->pwr_info) && ufshcd_is_hs_mode(dev_req_params)) @@ -836,6 +837,9 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba) | UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE | UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP); } + + if (host->hw_ver.major > 0x3) + hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH; } static void ufs_qcom_set_caps(struct ufs_hba *hba) @@ -1044,6 +1048,12 @@ static int ufs_qcom_init(struct ufs_hba *hba) dev_warn(dev, "%s: failed to configure the testbus %d\n", __func__, err); + /* + * Power up the PHY using the minimum supported gear (UFS_HS_G2). + * Switching to max gear will be performed during reinit if supported. + */ + host->hs_gear = UFS_HS_G2; + return 0; out_variant_clear: @@ -1410,6 +1420,13 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, } #endif +static void ufs_qcom_reinit_notify(struct ufs_hba *hba) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + phy_power_off(host->generic_phy); +} + /* * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations * @@ -1433,6 +1450,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = { .device_reset = ufs_qcom_device_reset, .config_scaling_param = ufs_qcom_config_scaling_param, .program_key = ufs_qcom_ice_program_key, + .reinit_notify = ufs_qcom_reinit_notify, }; /** diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 7fe928b82753..4b00c67e9d7f 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -217,6 +217,8 @@ struct ufs_qcom_host { struct reset_controller_dev rcdev; struct gpio_desc *device_reset; + + u32 hs_gear; }; static inline u32