From patchwork Thu Apr 14 00:38:43 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrei Warkentin X-Patchwork-Id: 705901 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p3E001KP017187 for ; Thu, 14 Apr 2011 00:00:07 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753173Ab1DNAAG (ORCPT ); Wed, 13 Apr 2011 20:00:06 -0400 Received: from exprod5og115.obsmtp.com ([64.18.0.246]:36432 "EHLO exprod5og115.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752818Ab1DNAAF (ORCPT ); Wed, 13 Apr 2011 20:00:05 -0400 Received: from DE01MGRG01.AM.MOT-MOBILITY.COM ([192.54.82.14]) (using TLSv1) by exprod5ob115.postini.com ([64.18.4.12]) with SMTP ID DSNKTaY5BHXk9HFviuRHvOj86CFkD6qppA8+@postini.com; Wed, 13 Apr 2011 17:00:05 PDT Received: from DE01MGRG01.AM.MOT-MOBILITY.COM ([10.22.94.168]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id p3E00Sgi019571 for ; Wed, 13 Apr 2011 20:00:28 -0400 (EDT) Received: from mail-gx0-f170.google.com (mail-gx0-f170.google.com [209.85.161.170]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id p3E00Pxn019544 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=OK) for ; Wed, 13 Apr 2011 20:00:27 -0400 (EDT) Received: by mail-gx0-f170.google.com with SMTP id 27so815542gxk.15 for ; Wed, 13 Apr 2011 17:00:03 -0700 (PDT) Received: by 10.236.187.103 with SMTP id x67mr70030yhm.102.1302739203234; Wed, 13 Apr 2011 17:00:03 -0700 (PDT) Received: from localhost.localdomain (dyngate-ca119-13.motorola.com [144.189.96.13]) by mx.google.com with ESMTPS id p67sm509602yhm.100.2011.04.13.17.00.01 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 13 Apr 2011 17:00:02 -0700 (PDT) From: Andrei Warkentin To: linux-mmc@vger.kernel.org Cc: arnd@arndb.de, cjb@laptop.org, Andrei Warkentin Subject: [RFC 3/3] MMC: Block CMD23 support for UHS104/SDXC cards. Date: Wed, 13 Apr 2011 19:38:43 -0500 Message-Id: <1302741523-22276-4-git-send-email-andreiw@motorola.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1302741523-22276-1-git-send-email-andreiw@motorola.com> References: <1302741523-22276-1-git-send-email-andreiw@motorola.com> X-CFilter-Loop: Reflected Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 14 Apr 2011 00:00:07 +0000 (UTC) SD cards operating at UHS104 or better support SET_BLOCK_COUNT. Signed-off-by: Andrei Warkentin --- drivers/mmc/card/block.c | 9 ++++++--- drivers/mmc/core/sd.c | 1 + include/linux/mmc/card.h | 1 + include/linux/mmc/sd.h | 1 + 4 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 282e6ef..6573e36 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -846,9 +846,12 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, blk_queue_logical_block_size(md->queue.queue, 512); set_capacity(md->disk, size); - if (mmc_host_cmd23(card->host) && - mmc_card_mmc(card)) - md->flags |= MMC_BLK_CMD23; + if (mmc_host_cmd23(card->host)) { + if (mmc_card_mmc(card) || + (mmc_card_sd(card) && + card->scr.cmds & SCR_CMDS_CMD23)) + md->flags |= MMC_BLK_CMD23; + } if (mmc_card_mmc(card) && md->flags & MMC_BLK_CMD23 && diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 6dac89f..16a1f10 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -195,6 +195,7 @@ static int mmc_decode_scr(struct mmc_card *card) else card->erased_byte = 0x0; + scr->cmds = UNSTUFF_BITS(resp, 32, 2); return 0; } diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 72a9868..337a851 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -70,6 +70,7 @@ struct sd_scr { unsigned char bus_widths; #define SD_SCR_BUS_WIDTH_1 (1<<0) #define SD_SCR_BUS_WIDTH_4 (1<<2) + unsigned char cmds; }; struct sd_ssr { diff --git a/include/linux/mmc/sd.h b/include/linux/mmc/sd.h index 3fd85e0..81ba37b 100644 --- a/include/linux/mmc/sd.h +++ b/include/linux/mmc/sd.h @@ -60,6 +60,7 @@ #define SCR_SPEC_VER_0 0 /* Implements system specification 1.0 - 1.01 */ #define SCR_SPEC_VER_1 1 /* Implements system specification 1.10 */ #define SCR_SPEC_VER_2 2 /* Implements system specification 2.00 */ +#define SCR_CMDS_CMD23 (1 << 1) /* Supports CMD23 */ /* * SD bus widths