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Sat, 7 Dec 2019 14:38:51 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Sat, 7 Dec 2019 14:38:44 +0800 From: Stanley Chu To: , , , , , , Subject: [PATCH v1 2/2] scsi: ufs-mediatek: add device reset implementation Date: Sat, 7 Dec 2019 14:39:08 +0800 Message-ID: <1575700748-28191-3-git-send-email-stanley.chu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1575700748-28191-1-git-send-email-stanley.chu@mediatek.com> References: <1575700748-28191-1-git-send-email-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191206_223921_096445_312114F7 X-CRM114-Status: UNSURE ( 8.55 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: leon.chen@mediatek.com, andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, Stanley Chu , linux-arm-kernel@lists.infradead.org, beanhuo@micron.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add device reset vops implementation in MediaTek UFS driver. Signed-off-by: Stanley Chu --- drivers/scsi/ufs/ufs-mediatek.c | 27 +++++++++++++++++++++++++++ drivers/scsi/ufs/ufs-mediatek.h | 7 +++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c index 83e28edc3ac5..6a3ec11b16db 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -6,10 +6,12 @@ * Peter Wang */ +#include #include #include #include #include +#include #include "ufshcd.h" #include "ufshcd-pltfrm.h" @@ -269,6 +271,30 @@ static int ufs_mtk_link_startup_notify(struct ufs_hba *hba, return ret; } +static void ufs_mtk_device_reset(struct ufs_hba *hba) +{ + struct arm_smccc_res res; + + arm_smccc_smc(MTK_SIP_UFS_CONTROL, UFS_MTK_SIP_DEVICE_RESET, + 0, 0, 0, 0, 0, 0, &res); + /* + * The reset signal is active low. UFS devices shall detect + * more than or equal to 1us of positive or negative RST_n + * pulse width. + * + * To be on safe side, keep the reset low for at least 10us. + */ + usleep_range(10, 15); + + arm_smccc_smc(MTK_SIP_UFS_CONTROL, UFS_MTK_SIP_DEVICE_RESET, + 1, 0, 0, 0, 0, 0, &res); + + /* Some devices may need time to respond to rst_n */ + usleep_range(10000, 15000); + + dev_info(hba->dev, "device reset done\n"); +} + static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) { struct ufs_mtk_host *host = ufshcd_get_variant(hba); @@ -303,6 +329,7 @@ static struct ufs_hba_variant_ops ufs_hba_mtk_vops = { .pwr_change_notify = ufs_mtk_pwr_change_notify, .suspend = ufs_mtk_suspend, .resume = ufs_mtk_resume, + .device_reset = ufs_mtk_device_reset, }; /** diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h index 19f8c42fe06f..b03f601d3a9e 100644 --- a/drivers/scsi/ufs/ufs-mediatek.h +++ b/drivers/scsi/ufs/ufs-mediatek.h @@ -6,6 +6,8 @@ #ifndef _UFS_MEDIATEK_H #define _UFS_MEDIATEK_H +#include + /* * Vendor specific pre-defined parameters */ @@ -29,6 +31,11 @@ #define VS_SAVEPOWERCONTROL 0xD0A6 #define VS_UNIPROPOWERDOWNCONTROL 0xD0A8 +/* + * SiP commands + */ +#define UFS_MTK_SIP_DEVICE_RESET BIT(1) + /* * VS_DEBUGCLOCKENABLE */ -- 2.18.0 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4D6DC2D0C6 for ; 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Sat, 7 Dec 2019 14:38:51 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Sat, 7 Dec 2019 14:38:44 +0800 From: Stanley Chu To: , , , , , , Subject: [PATCH v1 2/2] scsi: ufs-mediatek: add device reset implementation Date: Sat, 7 Dec 2019 14:39:08 +0800 Message-ID: <1575700748-28191-3-git-send-email-stanley.chu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1575700748-28191-1-git-send-email-stanley.chu@mediatek.com> References: <1575700748-28191-1-git-send-email-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191206_223921_096445_312114F7 X-CRM114-Status: UNSURE ( 8.55 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: leon.chen@mediatek.com, andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, Stanley Chu , linux-arm-kernel@lists.infradead.org, beanhuo@micron.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add device reset vops implementation in MediaTek UFS driver. Signed-off-by: Stanley Chu --- drivers/scsi/ufs/ufs-mediatek.c | 27 +++++++++++++++++++++++++++ drivers/scsi/ufs/ufs-mediatek.h | 7 +++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c index 83e28edc3ac5..6a3ec11b16db 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -6,10 +6,12 @@ * Peter Wang */ +#include #include #include #include #include +#include #include "ufshcd.h" #include "ufshcd-pltfrm.h" @@ -269,6 +271,30 @@ static int ufs_mtk_link_startup_notify(struct ufs_hba *hba, return ret; } +static void ufs_mtk_device_reset(struct ufs_hba *hba) +{ + struct arm_smccc_res res; + + arm_smccc_smc(MTK_SIP_UFS_CONTROL, UFS_MTK_SIP_DEVICE_RESET, + 0, 0, 0, 0, 0, 0, &res); + /* + * The reset signal is active low. UFS devices shall detect + * more than or equal to 1us of positive or negative RST_n + * pulse width. + * + * To be on safe side, keep the reset low for at least 10us. + */ + usleep_range(10, 15); + + arm_smccc_smc(MTK_SIP_UFS_CONTROL, UFS_MTK_SIP_DEVICE_RESET, + 1, 0, 0, 0, 0, 0, &res); + + /* Some devices may need time to respond to rst_n */ + usleep_range(10000, 15000); + + dev_info(hba->dev, "device reset done\n"); +} + static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) { struct ufs_mtk_host *host = ufshcd_get_variant(hba); @@ -303,6 +329,7 @@ static struct ufs_hba_variant_ops ufs_hba_mtk_vops = { .pwr_change_notify = ufs_mtk_pwr_change_notify, .suspend = ufs_mtk_suspend, .resume = ufs_mtk_resume, + .device_reset = ufs_mtk_device_reset, }; /** diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h index 19f8c42fe06f..b03f601d3a9e 100644 --- a/drivers/scsi/ufs/ufs-mediatek.h +++ b/drivers/scsi/ufs/ufs-mediatek.h @@ -6,6 +6,8 @@ #ifndef _UFS_MEDIATEK_H #define _UFS_MEDIATEK_H +#include + /* * Vendor specific pre-defined parameters */ @@ -29,6 +31,11 @@ #define VS_SAVEPOWERCONTROL 0xD0A6 #define VS_UNIPROPOWERDOWNCONTROL 0xD0A8 +/* + * SiP commands + */ +#define UFS_MTK_SIP_DEVICE_RESET BIT(1) + /* * VS_DEBUGCLOCKENABLE */ -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel