Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755778Ab0GMBOx (ORCPT ); Mon, 12 Jul 2010 21:14:53 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:40823 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752598Ab0GMBOu convert rfc822-to-8bit (ORCPT ); Mon, 12 Jul 2010 21:14:50 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=OTVLZmO6nG4hBroLPIKaC6PsC+rk0ZYNZnvsUHHXW/zyp5heUg6/UmJ2y75RZfHmIs hF+7XFACPNu0erHdBKXjAsRT3AZ898UliLOIxIEkx/s1bAqcAS1KJT8btyuTzENmekPq Xbvr81QhaQPCsGAnFeyV6tZg4W2MyDubN7Ct8= MIME-Version: 1.0 In-Reply-To: <81C3A93C17462B4BBD7E272753C10579169F9BD429@EXDCVYMBSTM005.EQ1STM.local> References: <1278658780-26397-1-git-send-email-hanumath.prasad@stericsson.com> <81C3A93C17462B4BBD7E272753C10579169F9BD429@EXDCVYMBSTM005.EQ1STM.local> Date: Tue, 13 Jul 2010 10:14:49 +0900 X-Google-Sender-Auth: nmLQ9kTypDDaEo6TJ6OMF0rm0hg Message-ID: Subject: Re: [PATCH] mmc: MMC 4.4 DDR support From: Kyungmin Park To: "P.Hanumath PRASAD" Cc: "linux-kernel@vger.kernel.org" , STEricsson_nomadik_linux , Linus WALLEIJ , "linux-mmc@vger.kernel.org" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 11100 Lines: 248 On Sat, Jul 10, 2010 at 2:40 PM, P.Hanumath PRASAD wrote: > Hi, > > The MMC_DDR_MODE is the flag set in case if the device is set to DDR mode. And this flag is for the host to enable the DDR Then where can I see your host drivers? I hope to see also. I wonder if we use the DDR mode, then I first set the DDR mode at both MMC and host. then no need to send DDR_MODE support for each request. doesn't it? Thank you, Kyungmin Park > > Mode for the controller before doing any data transfers in DDR mode. > > Thanks & Regards, > Hanumath > > -----Original Message----- > From: kyungmin78@gmail.com [mailto:kyungmin78@gmail.com] On Behalf Of Kyungmin Park > Sent: Saturday, July 10, 2010 10:58 AM > To: P.Hanumath PRASAD > Cc: linux-kernel@vger.kernel.org; STEricsson_nomadik_linux; Linus WALLEIJ; linux-mmc@vger.kernel.org > Subject: Re: [PATCH] mmc: MMC 4.4 DDR support > > Hi, > > Looks good to me except where's use the MMC_DDR_MODE. why do you set > brq.data.flags |= MMC_DDR_MODE? > > Now my SDHCI host don't support eMMC 4.4 but the end of july I can test it. > > Thank you, > Kyungmin Park > > On Fri, Jul 9, 2010 at 3:59 PM, Hanumath Prasad > wrote: >> Add support for Dual Data Rate MMC cards as defined in the 4.4 >> specification. >> >> Cc: linux-mmc@vger.kernel.org >> Acked-by: Linus Walleij >> Signed-off-by: Hanumath Prasad >> --- >> ?drivers/mmc/card/block.c | ? 10 +++++++--- >> ?drivers/mmc/core/mmc.c ? | ? 37 +++++++++++++++++++++++++++++++++++-- >> ?include/linux/mmc/card.h | ? ?5 +++++ >> ?include/linux/mmc/core.h | ? ?1 + >> ?include/linux/mmc/host.h | ? ?4 ++++ >> ?include/linux/mmc/mmc.h ?| ? 11 +++++++++-- >> ?6 files changed, 61 insertions(+), 7 deletions(-) >> >> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c >> index cb9fbc8..4eb84eb 100644 >> --- a/drivers/mmc/card/block.c >> +++ b/drivers/mmc/card/block.c >> @@ -299,7 +299,8 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) >> ? ? ? ? ? ? ? ? ? ? ? ?readcmd = MMC_READ_SINGLE_BLOCK; >> ? ? ? ? ? ? ? ? ? ? ? ?writecmd = MMC_WRITE_BLOCK; >> ? ? ? ? ? ? ? ?} >> - >> + ? ? ? ? ? ? ? if (mmc_card_ddr_mode(card)) >> + ? ? ? ? ? ? ? ? ? ? ? brq.data.flags |= MMC_DDR_MODE; >> ? ? ? ? ? ? ? ?if (rq_data_dir(req) == READ) { >> ? ? ? ? ? ? ? ? ? ? ? ?brq.cmd.opcode = readcmd; >> ? ? ? ? ? ? ? ? ? ? ? ?brq.data.flags |= MMC_DATA_READ; >> @@ -569,8 +570,11 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) >> ? ? ? ?struct mmc_command cmd; >> ? ? ? ?int err; >> >> - ? ? ? /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ >> - ? ? ? if (mmc_card_blockaddr(card)) >> + ? ? ? /* >> + ? ? ? ?* Block-addressed and ddr mode supported cards >> + ? ? ? ?* ignore MMC_SET_BLOCKLEN. >> + ? ? ? ?*/ >> + ? ? ? if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card)) >> ? ? ? ? ? ? ? ?return 0; >> >> ? ? ? ?mmc_claim_host(card->host); >> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c >> index 89f7a25..1d33503 100644 >> --- a/drivers/mmc/core/mmc.c >> +++ b/drivers/mmc/core/mmc.c >> @@ -227,6 +227,21 @@ static int mmc_read_ext_csd(struct mmc_card *card) >> ? ? ? ?} >> >> ? ? ? ?switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { >> + ? ? ? case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | >> + ? ? ? ? ? ?EXT_CSD_CARD_TYPE_26: >> + ? ? ? ? ? ? ? card->ext_csd.hs_max_dtr = 52000000; >> + ? ? ? ? ? ? ? card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; >> + ? ? ? ? ? ? ? break; >> + ? ? ? case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | >> + ? ? ? ? ? ?EXT_CSD_CARD_TYPE_26: >> + ? ? ? ? ? ? ? card->ext_csd.hs_max_dtr = 52000000; >> + ? ? ? ? ? ? ? card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; >> + ? ? ? ? ? ? ? break; >> + ? ? ? case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | >> + ? ? ? ? ? ?EXT_CSD_CARD_TYPE_26: >> + ? ? ? ? ? ? ? card->ext_csd.hs_max_dtr = 52000000; >> + ? ? ? ? ? ? ? card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; >> + ? ? ? ? ? ? ? break; >> ? ? ? ?case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: >> ? ? ? ? ? ? ? ?card->ext_csd.hs_max_dtr = 52000000; >> ? ? ? ? ? ? ? ?break; >> @@ -444,6 +459,18 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, >> ? ? ? ?mmc_set_clock(host, max_dtr); >> >> ? ? ? ?/* >> + ? ? ? ?* Activate DDR50 mode (if supported). >> + ? ? ? ?*/ >> + ? ? ? if (mmc_card_highspeed(card)) { >> + ? ? ? ? ? ? ? if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) >> + ? ? ? ? ? ? ? ? ? ? ? && (host->caps & (MMC_CAP_1_8V_DDR))) >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? mmc_card_set_ddr_mode(card); >> + ? ? ? ? ? ? ? else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) >> + ? ? ? ? ? ? ? ? ? ? ? && (host->caps & (MMC_CAP_1_2V_DDR))) >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? mmc_card_set_ddr_mode(card); >> + ? ? ? } >> + >> + ? ? ? /* >> ? ? ? ? * Activate wide bus (if supported). >> ? ? ? ? */ >> ? ? ? ?if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && >> @@ -451,10 +478,16 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, >> ? ? ? ? ? ? ? ?unsigned ext_csd_bit, bus_width; >> >> ? ? ? ? ? ? ? ?if (host->caps & MMC_CAP_8_BIT_DATA) { >> - ? ? ? ? ? ? ? ? ? ? ? ext_csd_bit = EXT_CSD_BUS_WIDTH_8; >> + ? ? ? ? ? ? ? ? ? ? ? if (mmc_card_ddr_mode(card)) >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_8; >> + ? ? ? ? ? ? ? ? ? ? ? else >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ext_csd_bit = EXT_CSD_BUS_WIDTH_8; >> ? ? ? ? ? ? ? ? ? ? ? ?bus_width = MMC_BUS_WIDTH_8; >> ? ? ? ? ? ? ? ?} else { >> - ? ? ? ? ? ? ? ? ? ? ? ext_csd_bit = EXT_CSD_BUS_WIDTH_4; >> + ? ? ? ? ? ? ? ? ? ? ? if (mmc_card_ddr_mode(card)) >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_4; >> + ? ? ? ? ? ? ? ? ? ? ? else >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ext_csd_bit = EXT_CSD_BUS_WIDTH_4; >> ? ? ? ? ? ? ? ? ? ? ? ?bus_width = MMC_BUS_WIDTH_4; >> ? ? ? ? ? ? ? ?} >> >> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h >> index d02d2c6..7d0aca8 100644 >> --- a/include/linux/mmc/card.h >> +++ b/include/linux/mmc/card.h >> @@ -44,6 +44,7 @@ struct mmc_ext_csd { >> ? ? ? ?unsigned int ? ? ? ? ? ?sa_timeout; ? ? ? ? ? ? /* Units: 100ns */ >> ? ? ? ?unsigned int ? ? ? ? ? ?hs_max_dtr; >> ? ? ? ?unsigned int ? ? ? ? ? ?sectors; >> + ? ? ? unsigned int ? ? ? ? ? ?card_type; >> ?}; >> >> ?struct sd_scr { >> @@ -97,6 +98,8 @@ struct mmc_card { >> ?#define MMC_STATE_READONLY ? ? (1<<1) ? ? ? ? ?/* card is read-only */ >> ?#define MMC_STATE_HIGHSPEED ? ?(1<<2) ? ? ? ? ?/* card is in high speed mode */ >> ?#define MMC_STATE_BLOCKADDR ? ?(1<<3) ? ? ? ? ?/* card uses block-addressing */ >> +#define MMC_STATE_HIGHSPEED_DDR (1<<4) ? ? ? ? ?/* card is in high speed */ >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? /* dual data rate mode */ >> ? ? ? ?unsigned int ? ? ? ? ? ?quirks; ? ? ? ? /* card quirks */ >> ?#define MMC_QUIRK_LENIENT_FN0 ?(1<<0) ? ? ? ? ?/* allow SDIO FN0 writes outside of the VS CCCR range */ >> ?#define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1) ? /* use func->cur_blksize */ >> @@ -129,11 +132,13 @@ struct mmc_card { >> ?#define mmc_card_present(c) ? ?((c)->state & MMC_STATE_PRESENT) >> ?#define mmc_card_readonly(c) ? ((c)->state & MMC_STATE_READONLY) >> ?#define mmc_card_highspeed(c) ?((c)->state & MMC_STATE_HIGHSPEED) >> +#define mmc_card_ddr_mode(c) ? ((c)->state & MMC_STATE_HIGHSPEED_DDR) >> ?#define mmc_card_blockaddr(c) ?((c)->state & MMC_STATE_BLOCKADDR) >> >> ?#define mmc_card_set_present(c) ? ? ? ?((c)->state |= MMC_STATE_PRESENT) >> ?#define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY) >> ?#define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED) >> +#define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR) >> ?#define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR) >> >> ?static inline int mmc_card_lenient_fn0(const struct mmc_card *c) >> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h >> index e4898e9..b31e47a 100644 >> --- a/include/linux/mmc/core.h >> +++ b/include/linux/mmc/core.h >> @@ -107,6 +107,7 @@ struct mmc_data { >> ?#define MMC_DATA_WRITE (1 << 8) >> ?#define MMC_DATA_READ ?(1 << 9) >> ?#define MMC_DATA_STREAM ? ? ? ?(1 << 10) >> +#define MMC_DDR_MODE ? ?(1 << 11) >> >> ? ? ? ?unsigned int ? ? ? ? ? ?bytes_xfered; >> >> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h >> index f65913c..c775290 100644 >> --- a/include/linux/mmc/host.h >> +++ b/include/linux/mmc/host.h >> @@ -155,6 +155,10 @@ struct mmc_host { >> ?#define MMC_CAP_DISABLE ? ? ? ? ? ? ? ?(1 << 7) ? ? ? ?/* Can the host be disabled */ >> ?#define MMC_CAP_NONREMOVABLE ? (1 << 8) ? ? ? ?/* Nonremovable e.g. eMMC */ >> ?#define MMC_CAP_WAIT_WHILE_BUSY ? ? ? ?(1 << 9) ? ? ? ?/* Waits while card is busy */ >> +#define MMC_CAP_1_8V_DDR ? ? ? ?(1 << 10) ? ? ? /* can support */ >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? /* DDR mode at 1.8V */ >> +#define MMC_CAP_1_2V_DDR ? ? ? ?(1 << 11) ? ? ? /* can support */ >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? /* DDR mode at 1.2V */ >> >> ? ? ? ?mmc_pm_flag_t ? ? ? ? ? pm_caps; ? ? ? ?/* supported pm features */ >> >> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h >> index 8a49cbf..fc446de 100644 >> --- a/include/linux/mmc/mmc.h >> +++ b/include/linux/mmc/mmc.h >> @@ -268,11 +268,18 @@ struct _mmc_csd { >> >> ?#define EXT_CSD_CARD_TYPE_26 ? (1<<0) ?/* Card can run at 26MHz */ >> ?#define EXT_CSD_CARD_TYPE_52 ? (1<<1) ?/* Card can run at 52MHz */ >> -#define EXT_CSD_CARD_TYPE_MASK 0x3 ? ? /* Mask out reserved and DDR bits */ >> +#define EXT_CSD_CARD_TYPE_MASK 0xF ? ? /* Mask out reserved bits */ >> +#define EXT_CSD_CARD_TYPE_DDR_1_8V ?(1<<2) ? /* Card can run at 52MHz */ >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?/* DDR mode @1.8V or 3V I/O */ >> +#define EXT_CSD_CARD_TYPE_DDR_1_2V ?(1<<3) ? /* Card can run at 52MHz */ >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?/* DDR mode @1.2V I/O */ >> +#define EXT_CSD_CARD_TYPE_DDR_52 ? ? ? (EXT_CSD_CARD_TYPE_DDR_1_8V ?\ >> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | EXT_CSD_CARD_TYPE_DDR_1_2V) >> >> -#define EXT_CSD_BUS_WIDTH_1 ? ?0 ? ? ? /* Card is in 1 bit mode */ >> ?#define EXT_CSD_BUS_WIDTH_4 ? ?1 ? ? ? /* Card is in 4 bit mode */ >> ?#define EXT_CSD_BUS_WIDTH_8 ? ?2 ? ? ? /* Card is in 8 bit mode */ >> +#define EXT_CSD_DDR_BUS_WIDTH_4 ? ?5 ? ?/* Card is in 4 bit DDR mode */ >> +#define EXT_CSD_DDR_BUS_WIDTH_8 ? ?6 ? ?/* Card is in 8 bit DDR mode */ >> >> ?/* >> ?* MMC_SWITCH access modes >> -- >> 1.6.3.3 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at ?http://vger.kernel.org/majordomo-info.html >> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/