From patchwork Wed Feb 27 03:36:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 10831013 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 4207F922 for ; Wed, 27 Feb 2019 03:38:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2BBEF2D005 for ; Wed, 27 Feb 2019 03:38:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1F2C42D86D; Wed, 27 Feb 2019 03:38:24 +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=-3.7 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,RCVD_IN_SORBS_WEB autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B00032D005 for ; Wed, 27 Feb 2019 03:38:23 +0000 (UTC) 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To: References:List-Owner; bh=ryFeYnjnGyPhEoiBrGjuP2vFAE1BUIdinkG2qbmZdx0=; b=t4I fcy3nEfNTcLUJYL2/IP64n46lZGFE+d5n5vtk+VbhE11DiqrsqMDnm+mo3yFBWumH11++PQ8OGiG6 TBLykrh6mDyVce7lIaWmNTjxErdK0lTeBc23rH+pyNaCvt/XypnAAS3ZJ4+CdHpM+Y1t4vTUeEbxd uNA7An7KMvPKuT43XKOYJ6nKxit9za3pF9VF8f0izmIdDLTe6No+/c/0qkn14fGWSIKChWrL8b/j/ oG6FZEqfB6G/F+mRDOy21/r6x5Nh8IbGeXRe0UIbcaXJmva4jWO+sSoZ25cdbC5EaQ2lSVHSdMMzZ jVzlh+RjcCjSq7gVB8URXzpjRCQRr6g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gyq32-0001bX-H6; Wed, 27 Feb 2019 03:38:20 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gyq2y-0001aZ-GK for linux-rockchip@lists.infradead.org; Wed, 27 Feb 2019 03:38:18 +0000 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.110]) by lucky1.263xmail.com (Postfix) with ESMTP id 1A0724EC8; Wed, 27 Feb 2019 11:38:07 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P24029T140137178584832S1551238684445785_; Wed, 27 Feb 2019 11:38:05 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <1cac9fb47a31af4efa36148cef5e19aa> X-RL-SENDER: shawn.lin@rock-chips.com X-SENDER: lintao@rock-chips.com X-LOGIN-NAME: shawn.lin@rock-chips.com X-FST-TO: jh80.chung@samsung.com X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Shawn Lin To: Jaehoon Chung , Ulf Hansson Subject: [PATCH 0/3] Add hardware unbusy interrupt support for dw_mmc Date: Wed, 27 Feb 2019 11:36:40 +0800 Message-Id: <1551238603-82412-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.9.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190226_193816_744952_27FCF99D X-CRM114-Status: GOOD ( 11.44 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Heiko Stuebner , Shawn Lin , Ziyuan Xu , linux-mmc@vger.kernel.org, Douglas Anderson , linux-rockchip@lists.infradead.org MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP DesignWare MMC controler lacks proper hardware wait busy support, so the software must check the busy state if the following tranfser need use data line. And dw_mci_wait_while_busy() now use busy check mostly with host's lock hold, and we can't relinguish CPU at this moment, which makes it rather painful when used in low-end platform. To solve this, Rockchip invent a new hardware unbusy interrupt module, which could generate interrupt if the state machine runs from busy state into idle state. Shawn Lin (3): mmc: dw_mmc: Check busy state in dw_mci_request() mmc: dw_mmc: Add hardware unbusy interrupt support mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support drivers/mmc/host/dw_mmc-rockchip.c | 30 +++++++++++++++++++ drivers/mmc/host/dw_mmc.c | 60 +++++++++++++++++++++++++++++++++++++- drivers/mmc/host/dw_mmc.h | 6 ++++ 3 files changed, 95 insertions(+), 1 deletion(-) Tested-by: Ziyuan Xu