From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrei Warkentin Subject: [patchv3 4/5] MMC: Block CMD23 support for UHS104/SDXC cards. Date: Sat, 16 Apr 2011 05:40:57 -0500 Message-ID: <1302950458-1969-5-git-send-email-andreiw@motorola.com> References: <1302741523-22276-1-git-send-email-andreiw@motorola.com> Return-path: Received: from exprod5og114.obsmtp.com ([64.18.0.28]:40306 "EHLO exprod5og114.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758928Ab1DPKCo (ORCPT ); Sat, 16 Apr 2011 06:02:44 -0400 Received: from DE01MGRG01.AM.MOT-MOBILITY.COM ([10.176.129.42]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id p3GA36bJ006195 for ; Sat, 16 Apr 2011 06:03:06 -0400 (EDT) Received: from mail-yw0-f42.google.com (mail-yw0-f42.google.com [209.85.213.42]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id p3GA339E006178 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=OK) for ; Sat, 16 Apr 2011 06:03:06 -0400 (EDT) Received: by mail-yw0-f42.google.com with SMTP id 1so1629744ywh.15 for ; Sat, 16 Apr 2011 03:02:42 -0700 (PDT) In-Reply-To: <1302741523-22276-1-git-send-email-andreiw@motorola.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org Cc: arindam.nath@amd.com, Andrei Warkentin , cjb@laptop.org, arnd@arndb.de SD cards operating at UHS104 or better support SET_BLOCK_COUNT. Cc: arindam.nath@amd.com Cc: cjb@laptop.org Cc: arnd@arndb.de 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 4b1a58e..23da6e6 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -851,9 +851,12 @@ 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 c758181..b33186a 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 -- 1.7.0.4