From patchwork Tue Feb 5 18:59:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evan Green X-Patchwork-Id: 10798107 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 03031746 for ; Tue, 5 Feb 2019 19:00:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E778A2C8C4 for ; Tue, 5 Feb 2019 19:00:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D6D982C88F; Tue, 5 Feb 2019 19:00:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4F9722C88F for ; Tue, 5 Feb 2019 19:00:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729596AbfBETAF (ORCPT ); Tue, 5 Feb 2019 14:00:05 -0500 Received: from mail-pf1-f193.google.com ([209.85.210.193]:37472 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730647AbfBES7o (ORCPT ); Tue, 5 Feb 2019 13:59:44 -0500 Received: by mail-pf1-f193.google.com with SMTP id y126so1899059pfb.4 for ; Tue, 05 Feb 2019 10:59:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=o96yOjRplPNDrhIKQ6wes7O4ciIlYcWyWqD4j3kpEaI=; b=S+8hH3ttt1mpvig6KOXa02LjwP3Qj40R/AB6JUz3ZsU1YhyivUcvyoYzsVHEY5l1HQ /a0dhimhhk++AwpqhiTa17/sc+nxwwIB90pmjLLPMuKFajnhKeM7fQo7vXoPZv+VEXKK mwhQRQ3qmZmz5CjWxAI9BldyhSVBSjqyN4wOw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=o96yOjRplPNDrhIKQ6wes7O4ciIlYcWyWqD4j3kpEaI=; b=hrLv0NpGJtvGom++L7DlZNsG+nGaO7DZD59nhQiN0jjpylcwKEDyaN5ZYp+iGipt64 zoST8dU/lAxrkGsd6Sxnqz5vF+24I219h8gPmCWoX+B10vNt6+DGB4V5uCUQlPb/xsy3 7NiebOXpJQhZUTxnObVt3++quae3NGzeMYmTx+2oVtAC/DrnbhPlJ4Kl0qLKx9CpdstA ysjq/xNgjYERmyziyPj8U8rHa+1wBFKWEhGSQ+PcLghxnNCnNl8tSZxdsqO6uVuTorrY Iw7vuc82mc+lXGvzIzFZXNI/bUzden0ge6fOv8UUpGBkOm421JTWKbISnj6Mer5kTJu7 54Ng== X-Gm-Message-State: AHQUAuZXsL9VPcNrvo3IhoZwgeklsEVjB+AAym+0DmV6NHHBY5Q2CCGZ A/+DB9CaRwRtC/P/ScwAiq6bRw== X-Google-Smtp-Source: AHgI3IbOZJBJ15pXMhrONi7J5emOI6q04JwhP1OXU6keZ/3QAFdrI4vC4s5UNtpT9OpuHUlQaTFVWw== X-Received: by 2002:aa7:8758:: with SMTP id g24mr6368171pfo.250.1549393182920; Tue, 05 Feb 2019 10:59:42 -0800 (PST) Received: from evgreen2.mtv.corp.google.com ([2620:15c:202:201:ffda:7716:9afc:1301]) by smtp.gmail.com with ESMTPSA id m3sm6424435pfi.102.2019.02.05.10.59.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 05 Feb 2019 10:59:42 -0800 (PST) From: Evan Green To: Andy Gross , Kishon Vijay Abraham I Cc: Stephen Boyd , Marc Gonzalez , Can Guo , Vivek Gautam , Douglas Anderson , Asutosh Das , Evan Green , "James E.J. Bottomley" , Vinayak Holikatti , "Martin K. Petersen" , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 6/8] scsi: ufs: qcom: Expose the reset controller for PHY Date: Tue, 5 Feb 2019 10:59:00 -0800 Message-Id: <20190205185902.106085-7-evgreen@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190205185902.106085-1-evgreen@chromium.org> References: <20190205185902.106085-1-evgreen@chromium.org> MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Expose a reset controller that the phy will later use to control its own PHY reset in the UFS controller. This will enable the combining of PHY init functionality into a single function. Signed-off-by: Evan Green Reviewed-by: Stephen Boyd --- Note: The remaining changes in this series need this change, since the PHYs now depend on getting the reset controller. Changes in v3: - Refactor to only expose the reset controller in one change (Stephen). - Add period to comment (Stephen). - Reset err to 0 in ignored error case (Stephen). - Add include of reset-controller.h (Stephen) Changes in v2: - Remove include of reset.h (Stephen) - Fix error print of phy_power_on (Stephen) - Comment for reset controller warnings on id != 0 (Stephen) - Add static to ufs_qcom_reset_ops (Stephen). drivers/scsi/ufs/Kconfig | 1 + drivers/scsi/ufs/ufs-qcom.c | 52 +++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufs-qcom.h | 4 +++ 3 files changed, 57 insertions(+) diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig index 2ddbb26d9c26..63c5c4115981 100644 --- a/drivers/scsi/ufs/Kconfig +++ b/drivers/scsi/ufs/Kconfig @@ -100,6 +100,7 @@ config SCSI_UFS_QCOM tristate "QCOM specific hooks to UFS controller platform driver" depends on SCSI_UFSHCD_PLATFORM && ARCH_QCOM select PHY_QCOM_UFS + select RESET_CONTROLLER help This selects the QCOM specific additions to UFSHCD platform driver. UFS host on QCOM needs some vendor specific configuration before diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 3aeadb14aae1..ab05ef5cfdcd 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "ufshcd.h" #include "ufshcd-pltfrm.h" @@ -49,6 +50,11 @@ 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 struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd) +{ + return container_of(rcd, struct ufs_qcom_host, rcdev); +} + static void ufs_qcom_dump_regs_wrapper(struct ufs_hba *hba, int offset, int len, const char *prefix, void *priv) { @@ -1147,6 +1153,41 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, return err; } +static int +ufs_qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id) +{ + struct ufs_qcom_host *host = rcdev_to_ufs_host(rcdev); + + /* Currently this code only knows about a single reset. */ + WARN_ON(id); + ufs_qcom_assert_reset(host->hba); + /* provide 1ms delay to let the reset pulse propagate. */ + usleep_range(1000, 1100); + return 0; +} + +static int +ufs_qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id) +{ + struct ufs_qcom_host *host = rcdev_to_ufs_host(rcdev); + + /* Currently this code only knows about a single reset. */ + WARN_ON(id); + ufs_qcom_deassert_reset(host->hba); + + /* + * after reset deassertion, phy will need all ref clocks, + * voltage, current to settle down before starting serdes. + */ + usleep_range(1000, 1100); + return 0; +} + +static const struct reset_control_ops ufs_qcom_reset_ops = { + .assert = ufs_qcom_reset_assert, + .deassert = ufs_qcom_reset_deassert, +}; + #define ANDROID_BOOT_DEV_MAX 30 static char android_boot_dev[ANDROID_BOOT_DEV_MAX]; @@ -1191,6 +1232,17 @@ static int ufs_qcom_init(struct ufs_hba *hba) host->hba = hba; ufshcd_set_variant(hba, host); + /* Fire up the reset controller. Failure here is non-fatal. */ + host->rcdev.of_node = dev->of_node; + host->rcdev.ops = &ufs_qcom_reset_ops; + host->rcdev.owner = dev->driver->owner; + host->rcdev.nr_resets = 1; + err = devm_reset_controller_register(dev, &host->rcdev); + if (err) { + dev_warn(dev, "Failed to register reset controller\n"); + err = 0; + } + /* * voting/devoting device ref_clk source is time consuming hence * skip devoting it during aggressive clock gating. This clock diff --git a/drivers/scsi/ufs/ufs-qcom.h b/drivers/scsi/ufs/ufs-qcom.h index c114826316eb..68a880185752 100644 --- a/drivers/scsi/ufs/ufs-qcom.h +++ b/drivers/scsi/ufs/ufs-qcom.h @@ -14,6 +14,8 @@ #ifndef UFS_QCOM_H_ #define UFS_QCOM_H_ +#include + #define MAX_UFS_QCOM_HOSTS 1 #define MAX_U32 (~(u32)0) #define MPHY_TX_FSM_STATE 0x41 @@ -237,6 +239,8 @@ struct ufs_qcom_host { /* Bitmask for enabling debug prints */ u32 dbg_print_en; struct ufs_qcom_testbus testbus; + + struct reset_controller_dev rcdev; }; static inline u32 From patchwork Tue Feb 5 18:59:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evan Green X-Patchwork-Id: 10798103 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 625AD1669 for ; Tue, 5 Feb 2019 18:59:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 529052C88F for ; Tue, 5 Feb 2019 18:59:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 467662C8D1; Tue, 5 Feb 2019 18:59:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7E9712C8C4 for ; Tue, 5 Feb 2019 18:59:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730683AbfBES7r (ORCPT ); Tue, 5 Feb 2019 13:59:47 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:36348 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730681AbfBES7q (ORCPT ); Tue, 5 Feb 2019 13:59:46 -0500 Received: by mail-pf1-f195.google.com with SMTP id b85so1901397pfc.3 for ; Tue, 05 Feb 2019 10:59:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0+F8WuN/dvxdmx2rBJ/SNVALSW0VXclvlpykqxHqEFo=; b=kN4DM9JfyNcDJm1vLu/dfsIq1gNUuObvk2aCCJ5Ouwu7zJYj2vmZIO+4G+5pyjrgju PT/pvJzu8uB0eqlnv8ICMe4mQpCnoMopRediX8B9TVNZvH5hfmEcdbn3X90w9lH6YrSA DLrIjSlHSaXaKqvJluC5WARXpZprH2gqLpL9E= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0+F8WuN/dvxdmx2rBJ/SNVALSW0VXclvlpykqxHqEFo=; b=qi+3YVkTwYwBugljAOWTpKaGQzDm6ZpMcBpF0PJKJ4YS/6mi/1uPLtjcq6kG/qbsqe S+iD+CQUTU3JlZNyulyBQiirQru3dWTx4V/JFZm5bizgVmMH2ibR0sa0s+uCaBRk4kvd lMTLBNNpGLl9wfo4eCww1Eu443EjB35A2IVLlpht3gFBdbeSPsG25SNkTgMwPoLsyiN7 hKbqcVuEEi6dUeT4/dPXeE8ourBmFsgwMmEzo6fW0nvlAOw5zVzMiSgyT6MYfe22O7Oi A430xsxtcIal+24Kx613OKsAQZtEA2w7lSH9ixjQSyhn8tzJKXuYxTH0cPgUYSvKBqLB bDpg== X-Gm-Message-State: AHQUAublAM9yB1EIQDATT2Nz6q6C50kn9z2IfotE5Ao9030bIxYO9lpl 4wNS7NhldQu/966oxKQWiB5Vag== X-Google-Smtp-Source: AHgI3IbDx/zu2RSXEeCVk3/SeycPf+V+BsOmnhxW1xFOeHjC6+OchMErTx/Pnzel8owv6kNCd0K/xw== X-Received: by 2002:a63:e309:: with SMTP id f9mr2499101pgh.280.1549393186113; Tue, 05 Feb 2019 10:59:46 -0800 (PST) Received: from evgreen2.mtv.corp.google.com ([2620:15c:202:201:ffda:7716:9afc:1301]) by smtp.gmail.com with ESMTPSA id m3sm6424435pfi.102.2019.02.05.10.59.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 05 Feb 2019 10:59:45 -0800 (PST) From: Evan Green To: Andy Gross , Kishon Vijay Abraham I Cc: Stephen Boyd , Marc Gonzalez , Can Guo , Vivek Gautam , Douglas Anderson , Asutosh Das , Evan Green , Jeffrey Hugo , Arnd Bergmann , linux-scsi@vger.kernel.org, Grygorii Strashko , Bjorn Andersson , linux-kernel@vger.kernel.org, Manu Gautam , "Martin K. Petersen" , "James E.J. Bottomley" , Vinayak Holikatti Subject: [PATCH v3 7/8] phy: qcom: Utilize UFS reset controller Date: Tue, 5 Feb 2019 10:59:01 -0800 Message-Id: <20190205185902.106085-8-evgreen@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190205185902.106085-1-evgreen@chromium.org> References: <20190205185902.106085-1-evgreen@chromium.org> MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Move the PHY reset from ufs-qcom into the respective PHYs. This will allow us to merge the two phases of UFS PHY initialization. Signed-off-by: Evan Green --- Changes in v3: - Refactored to move reset control in a single commit (Stephen) - Use no_pcs_sw_reset as an indicator of UFS reset in qmp-phy (Stephen). - Assign ret = PTR_ERR() earlier, for better reuse (Stephen). Changes in v2: - Use devm_* to get the reset (Stephen) - Clear ufs_reset on error getting it - Remove needless error print (Stephen) drivers/phy/qualcomm/phy-qcom-qmp.c | 39 ++++++++++++++++++++ drivers/phy/qualcomm/phy-qcom-ufs-i.h | 3 ++ drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c | 10 +++++ drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c | 10 +++++ drivers/phy/qualcomm/phy-qcom-ufs.c | 27 ++++++++++++++ drivers/scsi/ufs/ufs-qcom.c | 18 --------- 6 files changed, 89 insertions(+), 18 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c index daf751500232..2861c64b9bcc 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c @@ -897,6 +897,7 @@ struct qmp_phy { * @init_count: phy common block initialization count * @phy_initialized: indicate if PHY has been initialized * @mode: current PHY mode + * @ufs_reset: optional UFS PHY reset handle */ struct qcom_qmp { struct device *dev; @@ -914,6 +915,8 @@ struct qcom_qmp { int init_count; bool phy_initialized; enum phy_mode mode; + + struct reset_control *ufs_reset; }; static inline void qphy_setbits(void __iomem *base, u32 offset, u32 val) @@ -1314,6 +1317,9 @@ static int qcom_qmp_phy_com_exit(struct qcom_qmp *qmp) return 0; } + if (qmp->ufs_reset) + reset_control_assert(qmp->ufs_reset); + if (cfg->has_phy_com_ctrl) { qphy_setbits(serdes, cfg->regs[QPHY_COM_START_CONTROL], SERDES_START | PCS_START); @@ -1351,6 +1357,33 @@ static int qcom_qmp_phy_init(struct phy *phy) dev_vdbg(qmp->dev, "Initializing QMP phy\n"); + if (cfg->no_pcs_sw_reset) { + /* + * Get UFS reset, which is delayed until now to avoid a + * circular dependency where UFS needs its PHY, but the PHY + * needs this UFS reset. + */ + if (!qmp->ufs_reset) { + qmp->ufs_reset = + devm_reset_control_get_exclusive(qmp->dev, + "ufsphy"); + + if (IS_ERR(qmp->ufs_reset)) { + ret = PTR_ERR(qmp->ufs_reset); + dev_err(qmp->dev, + "failed to get UFS reset: %d\n", + ret); + + qmp->ufs_reset = NULL; + return ret; + } + } + + ret = reset_control_assert(qmp->ufs_reset); + if (ret) + goto err_lane_rst; + } + ret = qcom_qmp_phy_com_init(qphy); if (ret) return ret; @@ -1384,6 +1417,12 @@ static int qcom_qmp_phy_init(struct phy *phy) qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num); + if (qmp->ufs_reset) { + ret = reset_control_deassert(qmp->ufs_reset); + if (ret) + goto err_lane_rst; + } + /* * UFS PHY requires the deassert of software reset before serdes start. * For UFS PHYs that do not have software reset control bits, defer diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-i.h b/drivers/phy/qualcomm/phy-qcom-ufs-i.h index f798fb64de94..ba77348d807c 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs-i.h +++ b/drivers/phy/qualcomm/phy-qcom-ufs-i.h @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -101,6 +102,7 @@ struct ufs_qcom_phy { struct ufs_qcom_phy_specific_ops *phy_spec_ops; enum phy_mode mode; + struct reset_control *ufs_reset; }; /** @@ -132,6 +134,7 @@ struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev, struct ufs_qcom_phy *common_cfg, const struct phy_ops *ufs_qcom_phy_gen_ops, struct ufs_qcom_phy_specific_ops *phy_spec_ops); +int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common); int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, struct ufs_qcom_phy_calibration *tbl_A, int tbl_size_A, struct ufs_qcom_phy_calibration *tbl_B, int tbl_size_B, diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c index 1e0d4f2046a4..ef1383123883 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c @@ -48,6 +48,16 @@ static int ufs_qcom_phy_qmp_14nm_init(struct phy *generic_phy) bool is_rate_B = false; int ret; + ret = ufs_qcom_phy_get_reset(phy_common); + if (ret) + return ret; + + if (phy_common->ufs_reset) { + ret = reset_control_assert(phy_common->ufs_reset); + if (ret) + return ret; + } + if (phy_common->mode == PHY_MODE_UFS_HS_B) is_rate_B = true; diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c index aef40f7a41d4..b05f89d734f0 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c @@ -67,6 +67,16 @@ static int ufs_qcom_phy_qmp_20nm_init(struct phy *generic_phy) bool is_rate_B = false; int ret; + ret = ufs_qcom_phy_get_reset(phy_common); + if (ret) + return ret; + + if (phy_common->ufs_reset) { + ret = reset_control_assert(phy_common->ufs_reset); + if (ret) + return ret; + } + if (phy_common->mode == PHY_MODE_UFS_HS_B) is_rate_B = true; diff --git a/drivers/phy/qualcomm/phy-qcom-ufs.c b/drivers/phy/qualcomm/phy-qcom-ufs.c index f2979ccad00a..9cc8aa0b7a4f 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs.c @@ -147,6 +147,22 @@ struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev, } EXPORT_SYMBOL_GPL(ufs_qcom_phy_generic_probe); +int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common) +{ + struct reset_control *reset; + + if (phy_common->ufs_reset) + return 0; + + reset = devm_reset_control_get_exclusive_by_index(phy_common->dev, 0); + if (IS_ERR(reset)) + return PTR_ERR(reset); + + phy_common->ufs_reset = reset; + return 0; +} +EXPORT_SYMBOL_GPL(ufs_qcom_phy_get_reset); + static int __ufs_qcom_phy_clk_get(struct device *dev, const char *name, struct clk **clk_out, bool err_print) { @@ -533,6 +549,14 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) if (phy_common->is_powered_on) return 0; + if (phy_common->ufs_reset) { + err = reset_control_deassert(phy_common->ufs_reset); + if (err) { + dev_err(dev, "Failed to assert UFS PHY reset"); + return err; + } + } + if (!phy_common->is_started) { err = ufs_qcom_phy_start_serdes(phy_common); if (err) @@ -620,6 +644,9 @@ int ufs_qcom_phy_power_off(struct phy *generic_phy) ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vdda_pll); ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vdda_phy); + if (phy_common->ufs_reset) + reset_control_assert(phy_common->ufs_reset); + phy_common->is_powered_on = false; return 0; diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index ab05ef5cfdcd..1c25b1c82314 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -261,11 +261,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) if (is_rate_B) phy_set_mode(phy, PHY_MODE_UFS_HS_B); - /* Assert PHY reset and apply PHY calibration values */ - ufs_qcom_assert_reset(hba); - /* provide 1ms delay to let the reset pulse propagate */ - usleep_range(1000, 1100); - /* phy initialization - calibrate the phy */ ret = phy_init(phy); if (ret) { @@ -274,15 +269,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) goto out; } - /* De-assert PHY reset and start serdes */ - ufs_qcom_deassert_reset(hba); - - /* - * after reset deassertion, phy will need all ref clocks, - * voltage, current to settle down before starting serdes. - */ - usleep_range(1000, 1100); - /* power on phy - start serdes and phy's power and clocks */ ret = phy_power_on(phy); if (ret) { @@ -296,7 +282,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) return 0; out_disable_phy: - ufs_qcom_assert_reset(hba); phy_exit(phy); out: return ret; @@ -559,9 +544,6 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) */ ufs_qcom_disable_lane_clks(host); phy_power_off(phy); - - /* Assert PHY soft reset */ - ufs_qcom_assert_reset(hba); goto out; } From patchwork Tue Feb 5 18:59:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evan Green X-Patchwork-Id: 10798105 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2903C13BF for ; Tue, 5 Feb 2019 19:00:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 181732C88F for ; Tue, 5 Feb 2019 19:00:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C4F92C8D3; Tue, 5 Feb 2019 19:00:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D3C0C2C88F for ; Tue, 5 Feb 2019 18:59:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729031AbfBES76 (ORCPT ); Tue, 5 Feb 2019 13:59:58 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:38559 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730700AbfBES7v (ORCPT ); Tue, 5 Feb 2019 13:59:51 -0500 Received: by mail-pf1-f195.google.com with SMTP id q1so1896444pfi.5 for ; Tue, 05 Feb 2019 10:59:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=OKvOezERmc7AGeUNGNz1PRyc8UQ0XcsLX44GhBXLEMk=; b=L9+aal6EWhMq7wyn8zUHBaNPiWGopyqAwJBMXCBuT8OQsfEGnXd722qs9i2nPw7bCa ST4vd6wExaov4dIdxTbsF8vhZ2aLHeg6U93PgoJcxPZGVvOW+uRQJZbHyxwLKkklmoxd AeFG7lrOc2RRgTtp6v/xKsyxiud/58xxDE4jo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=OKvOezERmc7AGeUNGNz1PRyc8UQ0XcsLX44GhBXLEMk=; b=XE5CdzFQZE8XMj1EGTJ8afTDVEtNUgnEWKIijawTDVjrbCpwWTPLtg1L/+ZdplW3Ax THBJybtDKLTOEgiWnKs6cnXsQxL88kTcdcAs4Ps7VJja1KIPZL5nXS9hXrutIfcNCqJD wXkqDxwdsfpmMkwCHZ0ccQFIV+AqF2TyOcnfIPibvu17H5kt4RCtERil8bNhrk+wNkyy qZqEcfMY+x/aD9v24tKSQ1HE3FeLOR4XdatP0T0K+7OjZpZQi6Mog1fPom+13gAKJb25 T0j6FXVwBPqBkv3HkOkk908AIX1NTC/s9Y8gXhtMR/Mt1wXj7z2fMEDhGn3GyS45nZBV x6KA== X-Gm-Message-State: AHQUAuaXtre05hlez2C+GcjHBKBOoU7rW9Q72Ki32bE9Gsqsu5iSwDqY 6EL/PGOUh/Nq6WO7FAErD4cwOA== X-Google-Smtp-Source: AHgI3Iai0CUNX53Dgr/fotQUs8RzXOdstEnKCTi6rE8Z74ZqUh0AQLrNImcyI7squ6JcOEi0pC/YQQ== X-Received: by 2002:a62:e041:: with SMTP id f62mr6475741pfh.255.1549393189976; Tue, 05 Feb 2019 10:59:49 -0800 (PST) Received: from evgreen2.mtv.corp.google.com ([2620:15c:202:201:ffda:7716:9afc:1301]) by smtp.gmail.com with ESMTPSA id m3sm6424435pfi.102.2019.02.05.10.59.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 05 Feb 2019 10:59:49 -0800 (PST) From: Evan Green To: Andy Gross , Kishon Vijay Abraham I Cc: Stephen Boyd , Marc Gonzalez , Can Guo , Vivek Gautam , Douglas Anderson , Asutosh Das , Evan Green , Jeffrey Hugo , Arnd Bergmann , linux-scsi@vger.kernel.org, Grygorii Strashko , Bjorn Andersson , linux-kernel@vger.kernel.org, Manu Gautam , "Martin K. Petersen" , "James E.J. Bottomley" , Vinayak Holikatti Subject: [PATCH v3 8/8] phy: ufs-qcom: Refactor all init steps into phy_poweron Date: Tue, 5 Feb 2019 10:59:02 -0800 Message-Id: <20190205185902.106085-9-evgreen@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190205185902.106085-1-evgreen@chromium.org> References: <20190205185902.106085-1-evgreen@chromium.org> MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The phy code was using implicit sequencing between the PHY driver and the UFS driver to implement certain hardware requirements. Specifically, the PHY reset register in the UFS controller needs to be deasserted before serdes start occurs in the PHY. Before this change, the code was doing this by utilizing the two phy callbacks, phy_init() and phy_poweron(), as "init step 1" and "init step 2", where the UFS driver would deassert reset between these two steps. This makes it challenging to power off the regulators in suspend, as regulators are initialized in init, not in poweron(), but only poweroff() is called during suspend, not exit(). For UFS, move the actual firing up of the PHY to phy_poweron() and phy_poweroff() callbacks, rather than init()/exit(). UFS calls phy_poweroff() during suspend, so now all clocks and regulators for the phy can be powered down during suspend. QMP is a little tricky because the PHY is also shared with PCIe and USB3, which have their own definitions for init() and poweron(). Rename the meaty functions to _enable() and _disable() to disentangle from the PHY core names, and then create two different ops structures: one for UFS and one for the other PHY types. In phy-qcom-ufs, remove the 'is_powered_on' and 'is_started' guards, as the generic PHY code does the reference counting. The 14/20nm-specific init functions get collapsed into the generic power_on() function, with the addition of a calibrate() callback specific to 14/20nm. Signed-off-by: Evan Green Reviewed-by: Stephen Boyd --- Changes in v3: - Refactor init => poweron for all PHYs and UFS in one step (Stephen) Changes in v2: - Use devm_ to get the reset (Stephen) - Removed whitespace changes (Stephen) drivers/phy/qualcomm/phy-qcom-qmp.c | 80 ++++++-------------- drivers/phy/qualcomm/phy-qcom-ufs-i.h | 4 +- drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c | 35 +-------- drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c | 35 +-------- drivers/phy/qualcomm/phy-qcom-ufs.c | 44 ++++++----- drivers/scsi/ufs/ufs-qcom.c | 44 +++++------ 6 files changed, 68 insertions(+), 174 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c index 2861c64b9bcc..3597c4c0e50f 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c @@ -1341,8 +1341,7 @@ static int qcom_qmp_phy_com_exit(struct qcom_qmp *qmp) return 0; } -/* PHY Initialization */ -static int qcom_qmp_phy_init(struct phy *phy) +static int qcom_qmp_phy_enable(struct phy *phy) { struct qmp_phy *qphy = phy_get_drvdata(phy); struct qcom_qmp *qmp = qphy->qmp; @@ -1423,14 +1422,6 @@ static int qcom_qmp_phy_init(struct phy *phy) goto err_lane_rst; } - /* - * UFS PHY requires the deassert of software reset before serdes start. - * For UFS PHYs that do not have software reset control bits, defer - * starting serdes until the power on callback. - */ - if ((cfg->type == PHY_TYPE_UFS) && cfg->no_pcs_sw_reset) - goto out; - /* * Pull out PHY from POWER DOWN state. * This is active low enable signal to power-down PHY. @@ -1442,7 +1433,9 @@ static int qcom_qmp_phy_init(struct phy *phy) usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max); /* Pull PHY out of reset state */ - qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET); + if (!cfg->no_pcs_sw_reset) + qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET); + if (cfg->has_phy_dp_com_ctrl) qphy_clrbits(dp_com, QPHY_V3_DP_COM_SW_RESET, SW_RESET); @@ -1459,11 +1452,12 @@ static int qcom_qmp_phy_init(struct phy *phy) goto err_pcs_ready; } qmp->phy_initialized = true; - -out: - return ret; + return 0; err_pcs_ready: + if (qmp->ufs_reset) + reset_control_assert(qmp->ufs_reset); + clk_disable_unprepare(qphy->pipe_clk); err_clk_enable: if (cfg->has_lane_rst) @@ -1474,7 +1468,7 @@ static int qcom_qmp_phy_init(struct phy *phy) return ret; } -static int qcom_qmp_phy_exit(struct phy *phy) +static int qcom_qmp_phy_disable(struct phy *phy) { struct qmp_phy *qphy = phy_get_drvdata(phy); struct qcom_qmp *qmp = qphy->qmp; @@ -1502,44 +1496,6 @@ static int qcom_qmp_phy_exit(struct phy *phy) return 0; } -static int qcom_qmp_phy_poweron(struct phy *phy) -{ - struct qmp_phy *qphy = phy_get_drvdata(phy); - struct qcom_qmp *qmp = qphy->qmp; - const struct qmp_phy_cfg *cfg = qmp->cfg; - void __iomem *pcs = qphy->pcs; - void __iomem *status; - unsigned int mask, val; - int ret = 0; - - if (cfg->type != PHY_TYPE_UFS) - return 0; - - /* - * For UFS PHY that has not software reset control, serdes start - * should only happen when UFS driver explicitly calls phy_power_on - * after it deasserts software reset. - */ - if (cfg->no_pcs_sw_reset && !qmp->phy_initialized && - (qmp->init_count != 0)) { - /* start SerDes and Phy-Coding-Sublayer */ - qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl); - - status = pcs + cfg->regs[QPHY_PCS_READY_STATUS]; - mask = cfg->mask_pcs_ready; - - ret = readl_poll_timeout(status, val, !(val & mask), 1, - PHY_INIT_COMPLETE_TIMEOUT); - if (ret) { - dev_err(qmp->dev, "phy initialization timed-out\n"); - return ret; - } - qmp->phy_initialized = true; - } - - return ret; -} - static int qcom_qmp_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode) { @@ -1789,9 +1745,15 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np) } static const struct phy_ops qcom_qmp_phy_gen_ops = { - .init = qcom_qmp_phy_init, - .exit = qcom_qmp_phy_exit, - .power_on = qcom_qmp_phy_poweron, + .init = qcom_qmp_phy_enable, + .exit = qcom_qmp_phy_disable, + .set_mode = qcom_qmp_phy_set_mode, + .owner = THIS_MODULE, +}; + +static const struct phy_ops qcom_qmp_ufs_ops = { + .power_on = qcom_qmp_phy_enable, + .power_off = qcom_qmp_phy_disable, .set_mode = qcom_qmp_phy_set_mode, .owner = THIS_MODULE, }; @@ -1802,6 +1764,7 @@ int qcom_qmp_phy_create(struct device *dev, struct device_node *np, int id) struct qcom_qmp *qmp = dev_get_drvdata(dev); struct phy *generic_phy; struct qmp_phy *qphy; + const struct phy_ops *ops = &qcom_qmp_phy_gen_ops; char prop_name[MAX_PROP_NAME]; int ret; @@ -1888,7 +1851,10 @@ int qcom_qmp_phy_create(struct device *dev, struct device_node *np, int id) } } - generic_phy = devm_phy_create(dev, np, &qcom_qmp_phy_gen_ops); + if (qmp->cfg->type == PHY_TYPE_UFS) + ops = &qcom_qmp_ufs_ops; + + generic_phy = devm_phy_create(dev, np, ops); if (IS_ERR(generic_phy)) { ret = PTR_ERR(generic_phy); dev_err(dev, "failed to create qphy %d\n", ret); diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-i.h b/drivers/phy/qualcomm/phy-qcom-ufs-i.h index ba77348d807c..109ddd67be82 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs-i.h +++ b/drivers/phy/qualcomm/phy-qcom-ufs-i.h @@ -97,8 +97,6 @@ struct ufs_qcom_phy { char name[UFS_QCOM_PHY_NAME_LEN]; struct ufs_qcom_phy_calibration *cached_regs; int cached_regs_table_size; - bool is_powered_on; - bool is_started; struct ufs_qcom_phy_specific_ops *phy_spec_ops; enum phy_mode mode; @@ -117,6 +115,7 @@ struct ufs_qcom_phy { * and writes to QSERDES_RX_SIGDET_CNTRL attribute */ struct ufs_qcom_phy_specific_ops { + int (*calibrate)(struct ufs_qcom_phy *ufs_qcom_phy, bool is_rate_B); void (*start_serdes)(struct ufs_qcom_phy *phy); int (*is_physical_coding_sublayer_ready)(struct ufs_qcom_phy *phy); void (*set_tx_lane_enable)(struct ufs_qcom_phy *phy, u32 val); @@ -134,7 +133,6 @@ struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev, struct ufs_qcom_phy *common_cfg, const struct phy_ops *ufs_qcom_phy_gen_ops, struct ufs_qcom_phy_specific_ops *phy_spec_ops); -int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common); int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, struct ufs_qcom_phy_calibration *tbl_A, int tbl_size_A, struct ufs_qcom_phy_calibration *tbl_B, int tbl_size_B, diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c index ef1383123883..4815546f228c 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c @@ -42,38 +42,6 @@ void ufs_qcom_phy_qmp_14nm_advertise_quirks(struct ufs_qcom_phy *phy_common) UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE; } -static int ufs_qcom_phy_qmp_14nm_init(struct phy *generic_phy) -{ - struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy); - bool is_rate_B = false; - int ret; - - ret = ufs_qcom_phy_get_reset(phy_common); - if (ret) - return ret; - - if (phy_common->ufs_reset) { - ret = reset_control_assert(phy_common->ufs_reset); - if (ret) - return ret; - } - - if (phy_common->mode == PHY_MODE_UFS_HS_B) - is_rate_B = true; - - ret = ufs_qcom_phy_qmp_14nm_phy_calibrate(phy_common, is_rate_B); - if (!ret) - /* phy calibrated, but yet to be started */ - phy_common->is_started = false; - - return ret; -} - -static int ufs_qcom_phy_qmp_14nm_exit(struct phy *generic_phy) -{ - return 0; -} - static int ufs_qcom_phy_qmp_14nm_set_mode(struct phy *generic_phy, enum phy_mode mode, int submode) @@ -134,8 +102,6 @@ static int ufs_qcom_phy_qmp_14nm_is_pcs_ready(struct ufs_qcom_phy *phy_common) } static const struct phy_ops ufs_qcom_phy_qmp_14nm_phy_ops = { - .init = ufs_qcom_phy_qmp_14nm_init, - .exit = ufs_qcom_phy_qmp_14nm_exit, .power_on = ufs_qcom_phy_power_on, .power_off = ufs_qcom_phy_power_off, .set_mode = ufs_qcom_phy_qmp_14nm_set_mode, @@ -143,6 +109,7 @@ static const struct phy_ops ufs_qcom_phy_qmp_14nm_phy_ops = { }; static struct ufs_qcom_phy_specific_ops phy_14nm_ops = { + .calibrate = ufs_qcom_phy_qmp_14nm_phy_calibrate, .start_serdes = ufs_qcom_phy_qmp_14nm_start_serdes, .is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_14nm_is_pcs_ready, .set_tx_lane_enable = ufs_qcom_phy_qmp_14nm_set_tx_lane_enable, diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c index b05f89d734f0..f1cf819e12ea 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c @@ -61,38 +61,6 @@ void ufs_qcom_phy_qmp_20nm_advertise_quirks(struct ufs_qcom_phy *phy_common) UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE; } -static int ufs_qcom_phy_qmp_20nm_init(struct phy *generic_phy) -{ - struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy); - bool is_rate_B = false; - int ret; - - ret = ufs_qcom_phy_get_reset(phy_common); - if (ret) - return ret; - - if (phy_common->ufs_reset) { - ret = reset_control_assert(phy_common->ufs_reset); - if (ret) - return ret; - } - - if (phy_common->mode == PHY_MODE_UFS_HS_B) - is_rate_B = true; - - ret = ufs_qcom_phy_qmp_20nm_phy_calibrate(phy_common, is_rate_B); - if (!ret) - /* phy calibrated, but yet to be started */ - phy_common->is_started = false; - - return ret; -} - -static int ufs_qcom_phy_qmp_20nm_exit(struct phy *generic_phy) -{ - return 0; -} - static int ufs_qcom_phy_qmp_20nm_set_mode(struct phy *generic_phy, enum phy_mode mode, int submode) @@ -192,8 +160,6 @@ static int ufs_qcom_phy_qmp_20nm_is_pcs_ready(struct ufs_qcom_phy *phy_common) } static const struct phy_ops ufs_qcom_phy_qmp_20nm_phy_ops = { - .init = ufs_qcom_phy_qmp_20nm_init, - .exit = ufs_qcom_phy_qmp_20nm_exit, .power_on = ufs_qcom_phy_power_on, .power_off = ufs_qcom_phy_power_off, .set_mode = ufs_qcom_phy_qmp_20nm_set_mode, @@ -201,6 +167,7 @@ static const struct phy_ops ufs_qcom_phy_qmp_20nm_phy_ops = { }; static struct ufs_qcom_phy_specific_ops phy_20nm_ops = { + .calibrate = ufs_qcom_phy_qmp_20nm_phy_calibrate, .start_serdes = ufs_qcom_phy_qmp_20nm_start_serdes, .is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_20nm_is_pcs_ready, .set_tx_lane_enable = ufs_qcom_phy_qmp_20nm_set_tx_lane_enable, diff --git a/drivers/phy/qualcomm/phy-qcom-ufs.c b/drivers/phy/qualcomm/phy-qcom-ufs.c index 9cc8aa0b7a4f..8860ced486f3 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs.c @@ -147,7 +147,7 @@ struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev, } EXPORT_SYMBOL_GPL(ufs_qcom_phy_generic_probe); -int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common) +static int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common) { struct reset_control *reset; @@ -161,7 +161,6 @@ int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common) phy_common->ufs_reset = reset; return 0; } -EXPORT_SYMBOL_GPL(ufs_qcom_phy_get_reset); static int __ufs_qcom_phy_clk_get(struct device *dev, const char *name, struct clk **clk_out, bool err_print) @@ -544,10 +543,25 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) { struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy); struct device *dev = phy_common->dev; + bool is_rate_B = false; int err; - if (phy_common->is_powered_on) - return 0; + err = ufs_qcom_phy_get_reset(phy_common); + if (err) + return err; + + if (phy_common->ufs_reset) { + err = reset_control_assert(phy_common->ufs_reset); + if (err) + return err; + } + + if (phy_common->mode == PHY_MODE_UFS_HS_B) + is_rate_B = true; + + err = phy_common->phy_spec_ops->calibrate(phy_common, is_rate_B); + if (err) + return err; if (phy_common->ufs_reset) { err = reset_control_deassert(phy_common->ufs_reset); @@ -557,17 +571,13 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) } } - if (!phy_common->is_started) { - err = ufs_qcom_phy_start_serdes(phy_common); - if (err) - return err; - - err = ufs_qcom_phy_is_pcs_ready(phy_common); - if (err) - return err; + err = ufs_qcom_phy_start_serdes(phy_common); + if (err) + return err; - phy_common->is_started = true; - } + err = ufs_qcom_phy_is_pcs_ready(phy_common); + if (err) + return err; err = ufs_qcom_phy_enable_vreg(dev, &phy_common->vdda_phy); if (err) { @@ -611,7 +621,6 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) } } - phy_common->is_powered_on = true; goto out; out_disable_ref_clk: @@ -631,9 +640,6 @@ int ufs_qcom_phy_power_off(struct phy *generic_phy) { struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy); - if (!phy_common->is_powered_on) - return 0; - phy_common->phy_spec_ops->power_control(phy_common, false); if (phy_common->vddp_ref_clk.reg) @@ -647,8 +653,6 @@ int ufs_qcom_phy_power_off(struct phy *generic_phy) if (phy_common->ufs_reset) reset_control_assert(phy_common->ufs_reset); - phy_common->is_powered_on = false; - return 0; } EXPORT_SYMBOL_GPL(ufs_qcom_phy_power_off); diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 1c25b1c82314..de9d3f56b58c 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -544,19 +544,11 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) */ ufs_qcom_disable_lane_clks(host); phy_power_off(phy); - goto out; - } - /* - * If UniPro link is not active, PHY ref_clk, main PHY analog power - * rail and low noise analog power rail for PLL can be switched off. - */ - if (!ufs_qcom_is_link_active(hba)) { + } else if (!ufs_qcom_is_link_active(hba)) { ufs_qcom_disable_lane_clks(host); - phy_power_off(phy); } -out: return ret; } @@ -566,21 +558,26 @@ static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) struct phy *phy = host->generic_phy; int err; - err = phy_power_on(phy); - if (err) { - dev_err(hba->dev, "%s: failed enabling regs, err = %d\n", - __func__, err); - goto out; - } + if (ufs_qcom_is_link_off(hba)) { + err = phy_power_on(phy); + if (err) { + dev_err(hba->dev, "%s: failed PHY power on: %d\n", + __func__, err); + return err; + } - err = ufs_qcom_enable_lane_clks(host); - if (err) - goto out; + err = ufs_qcom_enable_lane_clks(host); + if (err) + return err; - hba->is_sys_suspended = false; + } else if (!ufs_qcom_is_link_active(hba)) { + err = ufs_qcom_enable_lane_clks(host); + if (err) + return err; + } -out: - return err; + hba->is_sys_suspended = false; + return 0; } struct ufs_qcom_dev_params { @@ -1106,8 +1103,6 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, return 0; if (on && (status == POST_CHANGE)) { - phy_power_on(host->generic_phy); - /* enable the device ref clock for HS mode*/ if (ufshcd_is_hs_mode(&hba->pwr_info)) ufs_qcom_dev_ref_clk_ctrl(host, true); @@ -1119,9 +1114,6 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, if (!ufs_qcom_is_link_active(hba)) { /* disable device ref_clk */ ufs_qcom_dev_ref_clk_ctrl(host, false); - - /* powering off PHY during aggressive clk gating */ - phy_power_off(host->generic_phy); } vote = host->bus_vote.min_bw_vote;