From patchwork Sat Dec 7 06:39:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11277273 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 35ECB112B for ; Sat, 7 Dec 2019 06:39:29 +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 13A0F24676 for ; Sat, 7 Dec 2019 06:39:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="A0yas84m"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="Ch2EJJRY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 13A0F24676 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=A0yas84mKTl+es x00JMzpR0TrGeCp/XAA6Y4iGoqgIkXLctLL8TjxWT/Apr6Gwi6U1bg7U1s+BbaQ2TcgMIv4l9bdjW gD1rdpVByyo0i/uBjdPRyQGDKosb6XTKvzPmbjbHlOUJncb6o4PheiolgJv0Qk03pyWyFBprB7IGN 31LFiz9gU3DZHcMdRsiLkfoTfQBochheBn5pHDTwDzgd2YFEA85i/YImTj+BXDoHdZHQIhuOQG1nL bP+ZvpMFrZiVIDhl+SLNisJVax33LiyJss8vh73TLnbskjadhebLZYw4gmAYuMjzl2/lGSzFUiWBJ VwmV7tzfS1sPPB5Jpi+w==; 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 1idTkT-0003uH-2h; Sat, 07 Dec 2019 06:39:25 +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 1idTkP-0003tN-1X; Sat, 07 Dec 2019 06:39:22 +0000 X-UUID: e05e125153d9401b898bf37850b2e51f-20191206 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=Ch2EJJRY4iHukue/yzS8oQ9cnCLyxaAYDIp8wKWnk6b2vAHc5j440FyHfuc5usvXgozSluJe0PiAnf0NO/IOaFu68v3rDG8/39vFGnzV6jGZPPo/v+gUEuh2fKLUwUpiubf/r9KC6REHx8Q/NWhF6iF8b4IW2RFhgYTKgHFH2c0=; X-UUID: e05e125153d9401b898bf37850b2e51f-20191206 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 2086838484; Fri, 06 Dec 2019 22:39:13 -0800 Received: from mtkmbs05n1.mediatek.inc (172.21.101.15) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 6 Dec 2019 22:40:08 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1395.4; 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-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_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from 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 --- 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 */