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Wed, 26 Mar 2014 07:00:20 -0400 Received: from epcpsbgr5.samsung.com (u145.gpu120.samsung.co.kr [203.254.230.145]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N31002ZJIKIAG40@mailout1.samsung.com> for linux-mmc@vger.kernel.org; Wed, 26 Mar 2014 20:00:19 +0900 (KST) Received: from epcpsbgm2.samsung.com ( [203.254.230.48]) by epcpsbgr5.samsung.com (EPCPMTA) with SMTP id F9.75.14803.243B2335; Wed, 26 Mar 2014 20:00:18 +0900 (KST) X-AuditID: cbfee691-b7efc6d0000039d3-1e-5332b342258e Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 8A.E8.28157.243B2335; Wed, 26 Mar 2014 20:00:18 +0900 (KST) Received: from DOTGIHJUN01 ([12.36.185.168]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N31003F4IKI3N20@mmp1.samsung.com>; Wed, 26 Mar 2014 20:00:18 +0900 (KST) From: Seungwon Jeon To: linux-mmc@vger.kernel.org Cc: 'Chris Ball' , 'Ulf Hansson' , 'Jaehoon Chung' , 'Jackey Shen' , 'Alim Akhtar' References: <1383653403-10049-1-git-send-email-ulf.hansson@linaro.org> <006701cf2a58$c628e050$527aa0f0$%jun@samsung.com> In-reply-to: Subject: [PATCH v4 3/5] mmc: step power class after final selection of bus mode Date: Wed, 26 Mar 2014 20:00:17 +0900 Message-id: <000301cf48e2$92a77310$b7f65930$%jun@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Ac7aH/uUm1J6MxFOSyaXb4Fx/nx/rAABnFmgDfJZ22AGGfSo8APt897AAVsylFACWLK74A== Content-language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrFIsWRmVeSWpSXmKPExsVy+t8zA12nzUbBBrvfWFk8mLeNzWLC5e2M FhPuTWS1uPGrjdXiyP9+Rovja8Md2DxaL/1l87hzbQ+bx41XC5k8+rasYvT4vEkugDWKyyYl NSezLLVI3y6BK+PAvWamgjO6Fe/3RDUwHlLpYuTkkBAwkTixsYkVwhaTuHBvPVsXIxeHkMAy Ronnu3cxwhS9Od7CBJFYxChxceZGKOcPo8TSZ7vZQKrYBLQk/r55wwxiiwjISvz8cwFsFLPA cUaJa1sOsIAkhASqJFad2wZWxCnAI7HuTyeYLSzgL3F53nYwm0VAVeL5mivsIDavgK3EyqvP GCFsQYkfk+8BzeEAGqouMWVKLkiYWUBeYvOat8wgYQmg8KO/uhAnREicb5vEAlEiIrHvxTtG kHMkBB6xS/x928wEsUpA4tvkQywQvbISmw4wQzwsKXFwxQ2WCYwSs5AsnoWweBaSxbOQbFjA yLKKUTS1ILmgOCm9yFSvODG3uDQvXS85P3cTIyReJ+5gvH/A+hBjMtD2icxSosn5wHjPK4k3 NDYzsjA1MTU2Mrc0I01YSZw3/VFSkJBAemJJanZqakFqUXxRaU5q8SFGJg5OqQbGCI/q+dvu J7hdXnMhdvly9U1ZeSYnIksSZu18dflMkH/58lAZdZOl9353rH7RwfdRz/BKbHZ76iJ7pRmy svsy7s8UkZ/79IKGe66T/I85gV+2GE/7GdzTM2POrMunLVbq65VwOl34sdODN5Dd37W3/92a pxFNZ/5dYCxPWxx9pknW/egX41utSizFGYmGWsxFxYkAMMAbHu0CAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrOKsWRmVeSWpSXmKPExsVy+t9jAV2nzUbBBi+2mVk8mLeNzWLC5e2M FhPuTWS1uPGrjdXiyP9+Rovja8Md2DxaL/1l87hzbQ+bx41XC5k8+rasYvT4vEkugDWqgdEm IzUxJbVIITUvOT8lMy/dVsk7ON453tTMwFDX0NLCXEkhLzE31VbJxSdA1y0zB+gCJYWyxJxS oFBAYnGxkr4dpgmhIW66FjCNEbq+IUFwPUYGaCBhHWPGgXvNTAVndCve7wE66JBKFyMnh4SA icSb4y1MELaYxIV769m6GLk4hAQWMUpcnLmRCcL5wyix9NluNpAqNgEtib9v3jCD2CICshI/ /1wA62AWOM4ocW3LARaQhJBAlcSqc9vAijgFeCTW/ekEs4UF/CUuz9sOZrMIqEo8X3OFHcTm FbCVWHn1GSOELSjxY/I9oDkcQEPVJaZMyQUJMwvIS2xe85YZJCwBFH70VxfihAiJ822TWCBK RCT2vXjHOIFRaBaSQbMQBs1CMmgWko4FjCyrGEVTC5ILipPSc430ihNzi0vz0vWS83M3MYKT wTPpHYyrGiwOMQpwMCrx8Fr0GQYLsSaWFVfmHmKU4GBWEuHdsdYoWIg3JbGyKrUoP76oNCe1 +BBjMtCbE5mlRJPzgYkqryTe0NjEzMjSyMzCyMTcnDRhJXHeg63WgUIC6YklqdmpqQWpRTBb mDg4pRoYN1TcOHr8QtXqgPi5YivmqynOjpAMv8nye9kMzdIvNk9uSrkZRDcElJ00ClFVrDzw eX1AqPJEq/zovh0TUhcmS+k9u76J89y8A5HfWa9ftZjOwLd+jeG5sGhVyT0vq1vu33Fa32th dPvhZFnbPSURPRsVhVL+XpJ62/04LnFus+UU1VcRm2O7lFiKMxINtZiLihMB/bry6EoDAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Power class is changed once only after selection of bus modes including speed and bus-width finishes finally. Signed-off-by: Seungwon Jeon Tested-by: Jaehoon Chung Acked-by: Jaehoon Chung Acked-by: Ulf Hansson --- drivers/mmc/core/mmc.c | 96 +++++++++++++++++++++++++++-------------------- 1 files changed, 55 insertions(+), 41 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 97f1912..480c100 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -732,17 +732,13 @@ static struct device_type mmc_type = { * extended CSD register, select it by executing the * mmc_switch command. */ -static int mmc_select_powerclass(struct mmc_card *card, - unsigned int bus_width) +static int __mmc_select_powerclass(struct mmc_card *card, + unsigned int bus_width) { - int err = 0; + struct mmc_host *host = card->host; + struct mmc_ext_csd *ext_csd = &card->ext_csd; unsigned int pwrclass_val = 0; - struct mmc_host *host; - - BUG_ON(!card); - - host = card->host; - BUG_ON(!host); + int err = 0; /* Power class selection is supported for versions >= 4.0 */ if (card->csd.mmca_vsn < CSD_SPEC_VER_4) @@ -754,14 +750,14 @@ static int mmc_select_powerclass(struct mmc_card *card, switch (1 << host->ios.vdd) { case MMC_VDD_165_195: - if (host->ios.clock <= 26000000) - pwrclass_val = card->ext_csd.raw_pwr_cl_26_195; - else if (host->ios.clock <= 52000000) + if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_26_195; + else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? - card->ext_csd.raw_pwr_cl_52_195 : - card->ext_csd.raw_pwr_cl_ddr_52_195; - else if (host->ios.clock <= 200000000) - pwrclass_val = card->ext_csd.raw_pwr_cl_200_195; + ext_csd->raw_pwr_cl_52_195 : + ext_csd->raw_pwr_cl_ddr_52_195; + else if (host->ios.clock <= MMC_HS200_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_200_195; break; case MMC_VDD_27_28: case MMC_VDD_28_29: @@ -772,14 +768,14 @@ static int mmc_select_powerclass(struct mmc_card *card, case MMC_VDD_33_34: case MMC_VDD_34_35: case MMC_VDD_35_36: - if (host->ios.clock <= 26000000) - pwrclass_val = card->ext_csd.raw_pwr_cl_26_360; - else if (host->ios.clock <= 52000000) + if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_26_360; + else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? - card->ext_csd.raw_pwr_cl_52_360 : - card->ext_csd.raw_pwr_cl_ddr_52_360; - else if (host->ios.clock <= 200000000) - pwrclass_val = card->ext_csd.raw_pwr_cl_200_360; + ext_csd->raw_pwr_cl_52_360 : + ext_csd->raw_pwr_cl_ddr_52_360; + else if (host->ios.clock <= MMC_HS200_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_200_360; break; default: pr_warning("%s: Voltage range not supported " @@ -805,6 +801,37 @@ static int mmc_select_powerclass(struct mmc_card *card, return err; } +static int mmc_select_powerclass(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + u32 bus_width, ext_csd_bits; + int err, ddr; + + /* Power class selection is supported for versions >= 4.0 */ + if (card->csd.mmca_vsn < CSD_SPEC_VER_4) + return 0; + + bus_width = host->ios.bus_width; + /* Power class values are defined only for 4/8 bit bus */ + if (bus_width == MMC_BUS_WIDTH_1) + return 0; + + ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; + if (ddr) + ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? + EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; + else + ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? + EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; + + err = __mmc_select_powerclass(card, ext_csd_bits); + if (err) + pr_warn("%s: power class selection to bus width %d ddr %d failed\n", + mmc_hostname(host), 1 << bus_width, ddr); + + return err; +} + /* * Selects the desired buswidth and switch to the HS200 mode * if bus width set without error @@ -1166,11 +1193,6 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; - err = mmc_select_powerclass(card, ext_csd_bits); - if (err) - pr_warning("%s: power class selection to bus width %d" - " failed\n", mmc_hostname(card->host), - 1 << bus_width); } /* @@ -1199,12 +1221,6 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, bus_width = bus_widths[idx]; if (bus_width == MMC_BUS_WIDTH_1) ddr = 0; /* no DDR for 1-bit width */ - err = mmc_select_powerclass(card, ext_csd_bits[idx][0]); - if (err) - pr_warning("%s: power class selection to " - "bus width %d failed\n", - mmc_hostname(card->host), - 1 << bus_width); err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, @@ -1229,13 +1245,6 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } if (!err && ddr) { - err = mmc_select_powerclass(card, ext_csd_bits[idx][1]); - if (err) - pr_warning("%s: power class selection to " - "bus width %d ddr %d failed\n", - mmc_hostname(card->host), - 1 << bus_width, ddr); - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, ext_csd_bits[idx][1], @@ -1273,6 +1282,11 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } /* + * Choose the power class with selected bus interface + */ + mmc_select_powerclass(card); + + /* * Enable HPI feature (if supported) */ if (card->ext_csd.hpi) {