From patchwork Fri Aug 30 12:09:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prasanna NAVARATNA X-Patchwork-Id: 2851935 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B57349F664 for ; Fri, 30 Aug 2013 12:09:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 979802038E for ; Fri, 30 Aug 2013 12:09:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 055CC20364 for ; Fri, 30 Aug 2013 12:09:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755455Ab3H3MJv (ORCPT ); Fri, 30 Aug 2013 08:09:51 -0400 Received: from plane.gmane.org ([80.91.229.3]:42614 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755407Ab3H3MJu (ORCPT ); Fri, 30 Aug 2013 08:09:50 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1VFNWN-00051e-8B for linux-mmc@vger.kernel.org; Fri, 30 Aug 2013 14:09:49 +0200 Received: from 202.122.18.226 ([202.122.18.226]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 30 Aug 2013 14:09:47 +0200 Received: from prasanna.navaratna by 202.122.18.226 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 30 Aug 2013 14:09:47 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: linux-mmc@vger.kernel.org From: Prasanna NAVARATNA Subject: [PATCH] mmc: enable BKOPS for supported eMMC(4.41) Date: Fri, 30 Aug 2013 12:09:27 +0000 (UTC) Lines: 62 Message-ID: Mime-Version: 1.0 X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: sea.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 202.122.18.226 (Mozilla/5.0 (Windows NT 6.1; rv:21.0) Gecko/20100101 Firefox/21.0) Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.2 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM, FSL_HELO_BARE_IP_2, RCVD_IN_DNSWL_HI, RCVD_NUMERIC_HELO, RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From d596be94f87b86ccb372a4ae55ee478951524895 Mon Sep 17 00:00:00 2001 From: Prasanna NAVARATNA Date: Fri, 30 Aug 2013 17:18:32 +0530 Subject: [PATCH] mmc: enable BKOPS for supported eMMC(4.41) BKOPS feature is optional for eMMC 4.41. If an eMMC supports BKOPS and is of version 4.41 then BKOPS feature is ignored and not enabled. Enable BKOPS for such eMMC. Also a capability is added to control the enabling of feature (only for eMMC 4.41, not valid for 4.5) Signed-off-by: Prasanna NAVARATNA --- drivers/mmc/core/mmc.c | 18 ++++++++++++++++++ include/linux/mmc/host.h | 1 + 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 6d02012..fc44fd7 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1269,6 +1269,24 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } /* + * Enable BKOPS feature (if supported and not enabled) + */ + if (!card->ext_csd.bkops_en && (host->caps2 & MMC_CAP2_BKOPS_EN) && + (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) { + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BKOPS_EN, 1, + card->ext_csd.generic_cmd6_time); + if (err && err != -EBADMSG) + goto free_card; + if (err) { + pr_warning("%s: Enabling BKOPS failed\n", + mmc_hostname(card->host)); + err = 0; + } else + card->ext_csd.bkops_en = 1; + } + + /* * Enable HPI feature (if supported) */ if (card->ext_csd.hpi) { diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 3b0c33a..2c79487 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -281,6 +281,7 @@ struct mmc_host { MMC_CAP2_PACKED_WR) #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before scan */ #define MMC_CAP2_SANITIZE (1 << 15) /* Support Sanitize */ +#define MMC_CAP2_BKOPS_EN (1 << 16) /* Enable BKOPS */ mmc_pm_flag_t pm_caps; /* supported pm features */