From patchwork Mon Dec 9 08:29:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11278585 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 68808112B for ; Mon, 9 Dec 2019 08:37:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 232EE2073D for ; Mon, 9 Dec 2019 08:37:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="MBYNj8rq"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="JJ+JXQZh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 232EE2073D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/NKF+6AYDfp4NgE/yyqwqIZ++vuGZf+yIT7HNpGp078=; b=MBYNj8rqsFa00y ZcxjMLBC7PffcU1lKYE25MWGlay1ceMGOr/z+2jgmuxfxxYqudFP2yAmwOJEKnCC3g6hhnCoNLZFR VeV2IOUapYYui6FURq2kkZn4hxjDIuEz62ZRn2G+Lzn2cJ0NB1ekmpq3GFY+S/YoM50IwGhb8R1j8 WCWEsKNRDwZvrVI7iA9zJCiyA5CeD1EAK+/2dWkt925fDTR924fpESPp3XNVYJKU89EUTqT6gZg0f +ga0462/gPIFQmxdycp6AHRumOVMGPr+zMERNQ1gxUwhTBCRIqVsqlIkXdCKuU9eUIhGQNp01JrPo aA8HB2X/c39roH05udog==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ieEXy-0007Vv-My; Mon, 09 Dec 2019 08:37:38 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ieEXv-0007UA-Hx; Mon, 09 Dec 2019 08:37:36 +0000 X-UUID: af7a9372158d49eda43e9526ab55cd54-20191209 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=FsOPpGNcvyN3hqCpKWKad5Cxcn0GwUWSQI3FseIG2Rg=; b=JJ+JXQZhVK2zvQGAqUuXloTBIHvnoLksjCyLgRgouq0Uif5uTIfVV9NwyVSv4mjvLPGrrEvtygZHfCvrr1o3b1B8KnuFICqOSMO/RJLPZqXx7tUrgKgKuBEdWKHGQx8oVTmvfvvmm+wS/IvlUtRWYGO3a3Skhut3fq80GaFBnAI=; X-UUID: af7a9372158d49eda43e9526ab55cd54-20191209 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1491707096; Mon, 09 Dec 2019 00:37:32 -0800 Received: from mtkmbs05n1.mediatek.inc (172.21.101.15) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 9 Dec 2019 00:30:12 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 9 Dec 2019 16:28:55 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 9 Dec 2019 16:29:01 +0800 From: Stanley Chu To: , , , , , , , Subject: [PATCH v2 2/2] scsi: ufs-mediatek: add device reset implementation Date: Mon, 9 Dec 2019 16:29:14 +0800 Message-ID: <1575880154-6099-3-git-send-email-stanley.chu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1575880154-6099-1-git-send-email-stanley.chu@mediatek.com> References: <1575880154-6099-1-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-20191209_003735_607894_CC106377 X-CRM114-Status: UNSURE ( 8.73 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines 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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add device reset vops implementation in MediaTek UFS driver. Signed-off-by: Stanley Chu Reviewed-by: Avri Altman --- 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 */