From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH V4 15/30] mmc: mmc: Add functions to enable / disable the Command Queue Date: Tue, 16 Aug 2016 13:44:25 +0300 Message-ID: <1471344280-16663-16-git-send-email-adrian.hunter@intel.com> References: <1471344280-16663-1-git-send-email-adrian.hunter@intel.com> Return-path: Received: from mga01.intel.com ([192.55.52.88]:14127 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753343AbcHPKuY (ORCPT ); Tue, 16 Aug 2016 06:50:24 -0400 In-Reply-To: <1471344280-16663-1-git-send-email-adrian.hunter@intel.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Ulf Hansson Cc: linux-mmc , Alex Lemberg , Mateusz Nowak , Yuliy Izrailov , Jaehoon Chung , Dong Aisheng , Das Asutosh , Zhangfei Gao , Dorfman Konstantin , David Griego , Sahitya Tummala , Harjani Ritesh , Venu Byravarasu Add helper functions to enable or disable the Command Queue. Signed-off-by: Adrian Hunter --- drivers/mmc/core/mmc_ops.c | 27 +++++++++++++++++++++++++++ include/linux/mmc/core.h | 2 ++ 2 files changed, 29 insertions(+) diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index ad6e9798e949..7ec7d62922b0 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -797,3 +797,30 @@ int mmc_can_ext_csd(struct mmc_card *card) { return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3); } + +int mmc_cmdq_switch(struct mmc_card *card, int enable) +{ + int err; + + if (!card->ext_csd.cmdq_support) + return -EOPNOTSUPP; + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN, + enable, card->ext_csd.generic_cmd6_time); + if (!err) + card->ext_csd.cmdq_en = enable; + + return err; +} + +int mmc_cmdq_enable(struct mmc_card *card) +{ + return mmc_cmdq_switch(card, EXT_CSD_CMDQ_MODE_ENABLED); +} +EXPORT_SYMBOL_GPL(mmc_cmdq_enable); + +int mmc_cmdq_disable(struct mmc_card *card) +{ + return mmc_cmdq_switch(card, 0); +} +EXPORT_SYMBOL_GPL(mmc_cmdq_disable); diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 368bed70aa9d..63dc01257852 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -161,6 +161,8 @@ extern void mmc_start_bkops(struct mmc_card *card, bool from_exception); extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int); extern int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error); extern int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd); +extern int mmc_cmdq_enable(struct mmc_card *card); +extern int mmc_cmdq_disable(struct mmc_card *card); #define MMC_ERASE_ARG 0x00000000 #define MMC_SECURE_ERASE_ARG 0x80000000 -- 1.9.1