On 28 March 2014 13:18, Seungwon Jeon <[email protected]> wrote:
> On Fri, March 28, 2014, Ulf Hansson wrote:
>> On 25 March 2014 10:23, Seungwon Jeon <[email protected]> wrote:
>> > Hi Ulf,
>> >
>> > On Tue, March 25, 2014, Ulf Hansson wrote:
>> >> On 14 March 2014 13:16, Seungwon Jeon <[email protected]> wrote:
>> >> > This patch adds HS400 mode support for eMMC5.0 device.
>> >> > HS400 mode is high speed DDR interface timing from HS200.
>> >> > Clock frequency is up to 200MHz and only 8-bit bus width is
>> >> > supported. In addition, tuning process of HS200 is required
>> >> > to synchronize the command response on the CMD line because
>> >> > CMD input timing for HS400 mode is the same as HS200 mode.
>> >> >
>> >> > Signed-off-by: Seungwon Jeon <[email protected]>
>> >> > Reviewed-by: Jackey Shen <[email protected]>
>> >> > Tested-by: Jaehoon Chung <[email protected]>
>> >> > Acked-by: Jaehoon Chung <[email protected]>
>> >> > ---
>> >> > drivers/mmc/core/bus.c | 1 +
>> >> > drivers/mmc/core/debugfs.c | 3 +
>> >> > drivers/mmc/core/mmc.c | 115
>> >> > +++++++++++++++++++++++++++++++++++++++++--
>> >> > include/linux/mmc/card.h | 1 +
>> >> > include/linux/mmc/host.h | 15 +++++-
>> >> > include/linux/mmc/mmc.h | 7 ++-
>> >> > 6 files changed, 134 insertions(+), 8 deletions(-)
>> >> >
>> >> > diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
>> >> > index f37e9d6..d2dbf02 100644
>> >> > --- a/drivers/mmc/core/bus.c
>> >> > +++ b/drivers/mmc/core/bus.c
>> >> > @@ -349,6 +349,7 @@ int mmc_add_card(struct mmc_card *card)
>> >> > mmc_hostname(card->host),
>> >> > mmc_card_uhs(card) ? "ultra high speed " :
>> >> > (mmc_card_hs(card) ? "high speed " : ""),
>> >> > + mmc_card_hs400(card) ? "HS400 " :
>> >> > (mmc_card_hs200(card) ? "HS200 " : ""),
>> >> > mmc_card_ddr52(card) ? "DDR " : "",
>> >> > uhs_bus_speed_mode, type, card->rca);
>> >> > diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
>> >> > index 1f730db..91eb162 100644
>> >> > --- a/drivers/mmc/core/debugfs.c
>> >> > +++ b/drivers/mmc/core/debugfs.c
>> >> > @@ -141,6 +141,9 @@ static int mmc_ios_show(struct seq_file *s, void
>> >> > *data)
>> >> > case MMC_TIMING_MMC_HS200:
>> >> > str = "mmc HS200";
>> >> > break;
>> >> > + case MMC_TIMING_MMC_HS400:
>> >> > + str = "mmc HS400";
>> >> > + break;
>> >> > default:
>> >> > str = "invalid";
>> >> > break;
>> >> > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
>> >> > index 6dd68e6..969d595 100644
>> >> > --- a/drivers/mmc/core/mmc.c
>> >> > +++ b/drivers/mmc/core/mmc.c
>> >> > @@ -240,7 +240,7 @@ static int mmc_get_ext_csd(struct mmc_card *card,
>> >> > u8 **new_ext_csd)
>> >> > static void mmc_select_card_type(struct mmc_card *card)
>> >> > {
>> >> > struct mmc_host *host = card->host;
>> >> > - u8 card_type = card->ext_csd.raw_card_type &
>> >> > EXT_CSD_CARD_TYPE_MASK;
>> >> > + u8 card_type = card->ext_csd.raw_card_type;
>> >> > u32 caps = host->caps, caps2 = host->caps2;
>> >> > unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
>> >> > unsigned int avail_type = 0;
>> >> > @@ -281,6 +281,18 @@ static void mmc_select_card_type(struct mmc_card
>> >> > *card)
>> >> > avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
>> >> > }
>> >> >
>> >> > + if (caps2 & MMC_CAP2_HS400_1_8V &&
>> >> > + card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
>> >> > + hs200_max_dtr = MMC_HS200_MAX_DTR;
>> >> > + avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
>> >> > + }
>> >> > +
>> >> > + if (caps2 & MMC_CAP2_HS400_1_2V &&
>> >> > + card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
>> >> > + hs200_max_dtr = MMC_HS200_MAX_DTR;
>> >> > + avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
>> >> > + }
>> >> > +
>> >> > card->ext_csd.hs_max_dtr = hs_max_dtr;
>> >> > card->ext_csd.hs200_max_dtr = hs200_max_dtr;
>> >> > card->mmc_avail_type = avail_type;
>> >> > @@ -499,6 +511,8 @@ static int mmc_read_ext_csd(struct mmc_card *card,
>> >> > u8 *ext_csd)
>> >> > ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
>> >> > card->ext_csd.raw_pwr_cl_ddr_52_360 =
>> >> > ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
>> >> > + card->ext_csd.raw_pwr_cl_ddr_200_360 =
>> >> > + ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
>> >> > }
>> >> >
>> >> > if (card->ext_csd.rev >= 5) {
>> >> > @@ -665,7 +679,10 @@ static int mmc_compare_ext_csds(struct mmc_card
>> >> > *card, unsigned bus_width)
>> >> > (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
>> >> > bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
>> >> > (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
>> >> > - bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]));
>> >> > + bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
>> >> > + (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
>> >> > + bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
>> >> > +
>> >> > if (err)
>> >> > err = -EINVAL;
>> >> >
>> >> > @@ -776,7 +793,9 @@ static int __mmc_select_powerclass(struct mmc_card
>> >> > *card,
>> >> > 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;
>> >> > + pwrclass_val = (bus_width ==
>> >> > EXT_CSD_DDR_BUS_WIDTH_8) ?
>> >> > + ext_csd->raw_pwr_cl_ddr_200_360 :
>> >> > + ext_csd->raw_pwr_cl_200_360;
>> >> > break;
>> >> > default:
>> >> > pr_warning("%s: Voltage range not supported "
>> >> > @@ -840,7 +859,8 @@ static void mmc_set_bus_speed(struct mmc_card *card)
>> >> > {
>> >> > unsigned int max_dtr = (unsigned int)-1;
>> >> >
>> >> > - if (mmc_card_hs200(card) && max_dtr >
>> >> > card->ext_csd.hs200_max_dtr)
>> >> > + if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
>> >> > + max_dtr > card->ext_csd.hs200_max_dtr)
>> >> > max_dtr = card->ext_csd.hs200_max_dtr;
>> >> > else if (mmc_card_hs(card) && max_dtr >
>> >> > card->ext_csd.hs_max_dtr)
>> >> > max_dtr = card->ext_csd.hs_max_dtr;
>> >> > @@ -939,6 +959,28 @@ static int mmc_select_hs(struct mmc_card *card)
>> >> > }
>> >> >
>> >> > /*
>> >> > + * Revert to the high-speed mode from above speed
>> >> > + */
>> >> > +static int mmc_revert_to_hs(struct mmc_card *card)
>> >> > +{
>> >> > + /*
>> >> > + * CMD13, which is used to confirm the completion of timing
>> >> > + * change, will be issued at higher speed timing condtion
>> >> > + * rather than high-speed. If device has completed the change
>> >> > + * to high-speed mode, it may not be proper timing to issue
>> >> > + * command. Low speed supplies better timing margin than high
>> >> > + * speed. Accordingly clock rate & timging should be chagned
>> >> > + * ahead before actual switch.
>> >>
>> >> I have some problem to understand this comment. I guess you are trying
>> >> to provide the arguments to why it makes sense to perform the revert
>> >> to lower speed mode!?
>> >>
>> >> This makes me wonder if this is not part of the spec? Could you try to
>> >> clarify?
>> > But specification says that "HS_TIMING must be set to "0x1" before setting
>> > BUS_WIDTH for dual data
>> rate operation".
>> > I think this sequence is not graceful.
>> > I also commented why speed mode should be changed to high-speed mode from
>> > HS200 mode in the
>> function-called part.
>> > Because it is not possible to set 8-bit data bus for dual rate on HS200
>> > mode, revert to high-speed
>> from HS200 is needed.
>> > If the above-commented point makes it confused, it could be removed.
>> > Please let me know your opinion.
>> >
>> >>
>> >> > + */
>> >> > + mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
>> >> > + mmc_set_bus_speed(card);
>> >> > +
>> >> > + return mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> >> > + EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
>> >> > + card->ext_csd.generic_cmd6_time);
>> >> > +}
>> >> > +
>> >> > +/*
>> >> > * Activate wide bus and DDR if supported.
>> >> > */
>> >> > static int mmc_select_hs_ddr(struct mmc_card *card)
>> >> > @@ -993,6 +1035,54 @@ static int mmc_select_hs_ddr(struct mmc_card
>> >> > *card)
>> >> > return err;
>> >> > }
>> >> >
>> >> > +static int mmc_select_hs400(struct mmc_card *card)
>> >> > +{
>> >> > + struct mmc_host *host = card->host;
>> >> > + int err = 0;
>> >> > +
>> >> > + /*
>> >> > + * The bus width is set to only 8 DDR in HS400 mode
>> >>
>> >> Please rephrase the comment to something like:
>> >> "HS400 mode requires 8-bit bus width."
>> > As it is, it was from spec's description.
>> > But I think yours would be more clearable.
>> >
>> >>
>> >> > + */
>> >> > + if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
>> >> > + host->ios.bus_width == MMC_BUS_WIDTH_8))
>> >> > + return 0;
>> >> > +
>> >> > + /*
>> >> > + * Before setting BUS_WIDTH for dual data rate operation,
>> >> > + * HS_TIMING must be set to High Speed(0x1)
>> >> > + */
>> >>
>> >> Please rephrase comment:
>> >>
>> >> "Before switching to dual data rate operation for HS400, we need
>> >> revert from HS200 timing to regular HS timing."
>> > Ok.
>> >
>> >>
>> >> > + err = mmc_revert_to_hs(card);
>> >>
>> >> I don't think we need a separate function to handle the revert.
>> >> Please, just add the code here instead. While you do that, I suppose
>> >> we should combine the comment in that function into one comment here.
>> > OK, I don't oppose that.
>> >
>> >>
>> >> > + if (err) {
>> >> > + pr_warn("%s: switch to high-speed from hs200 failed,
>> >> > err:%d\n",
>> >> > + mmc_hostname(host), err);
>> >> > + return err;
>> >> > + }
>> >> > +
>> >> > + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> >> > + EXT_CSD_BUS_WIDTH,
>> >> > + EXT_CSD_DDR_BUS_WIDTH_8,
>> >> > + card->ext_csd.generic_cmd6_time);
>> >> > + if (err) {
>> >> > + pr_warn("%s: switch to bus width for hs400 failed,
>> >> > err:%d\n",
>> >> > + mmc_hostname(host), err);
>> >> > + return err;
>> >> > + }
>> >> > +
>> >> > + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> >> > + EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS400,
>> >> > + card->ext_csd.generic_cmd6_time);
>> >> > + if (err) {
>> >> > + pr_warn("%s: switch to hs400 failed, err:%d\n",
>> >> > + mmc_hostname(host), err);
>> >> > + return err;
>> >> > + }
>> >> > +
>> >> > + mmc_set_timing(host, MMC_TIMING_MMC_HS400);
>> >> > + mmc_set_bus_speed(card);
>> >> > +
>> >> > + return 0;
>> >> > +}
>> >> > +
>> >> > /*
>> >> > * For device supporting HS200 mode, the following sequence
>> >> > * should be done before executing the tuning process.
>> >> > @@ -1025,7 +1115,16 @@ static int mmc_select_hs200(struct mmc_card
>> >> > *card)
>> >> > EXT_CSD_HS_TIMING,
>> >> > EXT_CSD_TIMING_HS200,
>> >> > card->ext_csd.generic_cmd6_time,
>> >> > true, true, true);
>> >> > - if (!err)
>> >> > + if (err)
>> >> > + goto err;
>> >> > +
>> >> > + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400)
>> >> > + /*
>> >> > + * Timing should be adjusted to the HS400 target
>> >> > + * operation frequency for tuning process
>> >> > + */
>> >> > + mmc_set_timing(host,
>> >> > MMC_TIMING_MMC_HS400_TUNING);
>> >>
>> >> This seems strange. Do we really need a separate
>> >> MMC_TIMING_MMC_HS400_TUNING value?
>> > Spec. describes the HS400 selection sequence like below.
>> > <Quot>
>> > ...
>> > 6) Perform the Tuning Process at the HS400 target operating frequency
>> > (Note: tuning process in HS200 mode is required to synchronize the command
>> > response on the CMD line
>> to CLK for HS400 operation).
>> > ...
>> > </Quot>
>> > That means target clock rate for tuning sequence can be different with
>> > HS200.
>> > Considering for that, it needs to distinguish.
>>
>> I understand the spec now, thanks.
>>
>> Still, I am not convinced we should handle this through the
>> MMC_TIMING* field. That will leave host drivers to do some magic clock
>> frequency calculation from their ->set_ios callbacks, just depending
>> on the MMC_TIMING_MMC_HS400_TUNING value.
>>
>> I am also a bit concerned how MMC_TIMING_MMC_HS400_TUNING, would work
>> if/when we implement periodic re-tuning - triggered from the mmc core
>> layer.
>>
>> What we really want to do, is to pretend we were to operate in
>> MMC_TIMING_MMC_HS400 and ask the host driver what the target frequency
>> would be in this case. Then set this frequency through
>> mmc_set_clock().
>>
>> Then how do we ask the host driver about this frequency? Let's add a
>> new host_ops callback. We want it to be generic, so provide the
>> MMC_TIMING bit as a parameter. Additionally we want it to be optional
>> to implement, thus for those host drivers that supports the same
>> target frequency for HS200 as for HS400, they don't need to implement
>> it.
>>
>> Would this be a way forward?
>
> Thanks for your opinion.
>
> IMO, in this case additional callback handling seems to cause the
> complication in host side.
> I think we don't need to ask host driver about target frequency for HS400 in
> order to set specific frequency through
> mmc_set_clock().
> Target frequency which core layer requires for HS400 will be 200MHz and it is
> also mentioned in specification.
> Host driver including actual controller just will effort to make DDR rate
> with 200MHz.
What the mmc_set_clock() request is not the same as what the frequency
actually will be set to. That depends on the host controller/driver.
If for some reason the host controller/driver are not able to use the
same frequency for HS200 as for HS400, this should be possible to be
addressed in the way I suggested.
> MMC_TIMING_MMC_HS400_TUNING may be used as notification for host to prepare
> HS400 tuning sequence.
So, are you saying that your controller are have different tuning
methods for HS200 vs HS400? That's a different requirement, which of
course we need to handle.
> If host driver doesn't need to care MMC_TIMING_MMC_HS400_TUNING, it can be
> ignored.
It can't be ignored by host drivers, since drivers will need to cope
with it even if it means that it will actively ignore it.
Kind regards
Ulf Hanssson
> Perhaps, we may need other opinions.
>
> Thanks,
> Seungwon Jeon
>
>>
>> Kind regards
>> Ulf Hansson
>>
>> >
>> >>
>> >> > + else
>> >> > mmc_set_timing(host, MMC_TIMING_MMC_HS200);
>> >> > }
>> >> > err:
>> >> > @@ -1070,7 +1169,7 @@ bus_speed:
>> >> >
>> >> > /*
>> >> > * Execute tuning sequence to seek the proper bus operating
>> >> > - * conditions for HS200, which sends CMD21 to the device.
>> >> > + * conditions for HS200 and HS400, which sends CMD21 to the device.
>> >> > */
>> >> > static int mmc_hs200_tuning(struct mmc_card *card)
>> >> > {
>> >> > @@ -1304,6 +1403,10 @@ static int mmc_init_card(struct mmc_host *host,
>> >> > u32 ocr,
>> >> > err = mmc_hs200_tuning(card);
>> >> > if (err)
>> >> > goto err;
>> >> > +
>> >> > + err = mmc_select_hs400(card);
>> >> > + if (err)
>> >> > + goto err;
>> >> > } else if (mmc_card_hs(card)) {
>> >> > /* Select the desired bus width optionally */
>> >> > err = mmc_select_bus_width(card);
>> >> > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
>> >> > index def6814..2b24c36 100644
>> >> > --- a/include/linux/mmc/card.h
>> >> > +++ b/include/linux/mmc/card.h
>> >> > @@ -110,6 +110,7 @@ struct mmc_ext_csd {
>> >> > u8 raw_pwr_cl_200_360; /* 237 */
>> >> > u8 raw_pwr_cl_ddr_52_195; /* 238 */
>> >> > u8 raw_pwr_cl_ddr_52_360; /* 239 */
>> >> > + u8 raw_pwr_cl_ddr_200_360; /* 253 */
>> >> > u8 raw_bkops_status; /* 246 */
>> >> > u8 raw_sectors[4]; /* 212 - 4
>> >> > bytes */
>> >> >
>> >> > diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
>> >> > index 1ee3c10..cc716e4 100644
>> >> > --- a/include/linux/mmc/host.h
>> >> > +++ b/include/linux/mmc/host.h
>> >> > @@ -61,6 +61,8 @@ struct mmc_ios {
>> >> > #define MMC_TIMING_UHS_DDR50 7
>> >> > #define MMC_TIMING_MMC_DDR52 8
>> >> > #define MMC_TIMING_MMC_HS200 9
>> >> > +#define MMC_TIMING_MMC_HS400 10
>> >> > +#define MMC_TIMING_MMC_HS400_TUNING 11
>> >>
>> >> MMC_TIMING_MMC_HS400_TUNING ?
>> >>
>> >> >
>> >> > unsigned char signal_voltage; /* signalling voltage
>> >> > (1.8V or 3.3V) */
>> >> >
>> >> > @@ -274,6 +276,10 @@ struct mmc_host {
>> >> > #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
>> >> > MMC_CAP2_PACKED_WR)
>> >> > #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up
>> >> > before scan */
>> >> > +#define MMC_CAP2_HS400_1_8V (1 << 15) /* Can support HS400
>> >> > 1.8V */
>> >> > +#define MMC_CAP2_HS400_1_2V (1 << 16) /* Can support HS400
>> >> > 1.2V */
>> >> > +#define MMC_CAP2_HS400 (MMC_CAP2_HS400_1_8V | \
>> >> > + MMC_CAP2_HS400_1_2V)
>> >> >
>> >> > mmc_pm_flag_t pm_caps; /* supported pm
>> >> > features */
>> >> >
>> >> > @@ -486,11 +492,18 @@ static inline int mmc_card_uhs(struct mmc_card
>> >> > *card)
>> >> >
>> >> > static inline bool mmc_card_hs200(struct mmc_card *card)
>> >> > {
>> >> > - return card->host->ios.timing == MMC_TIMING_MMC_HS200;
>> >> > + return card->host->ios.timing == MMC_TIMING_MMC_HS200 ||
>> >> > + card->host->ios.timing == MMC_TIMING_MMC_HS400_TUNING;
>> >>
>> >> MMC_TIMING_MMC_HS400_TUNING ?
>> > It also indicates that card is currently in HS200 mode with the result of
>> > setting HS_TIMING'.
>> >
>> > Thanks,
>> > Seungwon Jeon
>> >
>> >>
>> >> > }
>> >> >
>> >> > static inline bool mmc_card_ddr52(struct mmc_card *card)
>> >> > {
>> >> > return card->host->ios.timing == MMC_TIMING_MMC_DDR52;
>> >> > }
>> >> > +
>> >> > +static inline bool mmc_card_hs400(struct mmc_card *card)
>> >> > +{
>> >> > + return card->host->ios.timing == MMC_TIMING_MMC_HS400;
>> >> > +}
>> >> > +
>> >> > #endif /* LINUX_MMC_HOST_H */
>> >> > diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
>> >> > index f429f13..64ec963 100644
>> >> > --- a/include/linux/mmc/mmc.h
>> >> > +++ b/include/linux/mmc/mmc.h
>> >> > @@ -325,6 +325,7 @@ struct _mmc_csd {
>> >> > #define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
>> >> > #define EXT_CSD_GENERIC_CMD6_TIME 248 /* RO */
>> >> > #define EXT_CSD_CACHE_SIZE 249 /* RO, 4 bytes */
>> >> > +#define EXT_CSD_PWR_CL_DDR_200_360 253 /* RO */
>> >> > #define EXT_CSD_TAG_UNIT_SIZE 498 /* RO */
>> >> > #define EXT_CSD_DATA_TAG_SUPPORT 499 /* RO */
>> >> > #define EXT_CSD_MAX_PACKED_WRITES 500 /* RO */
>> >> > @@ -354,7 +355,6 @@ struct _mmc_csd {
>> >> > #define EXT_CSD_CMD_SET_SECURE (1<<1)
>> >> > #define EXT_CSD_CMD_SET_CPSECURE (1<<2)
>> >> >
>> >> > -#define EXT_CSD_CARD_TYPE_MASK 0x3F /* Mask out reserved bits */
>> >> > #define EXT_CSD_CARD_TYPE_HS_26 (1<<0) /* Card can run at
>> >> > 26MHz */
>> >> > #define EXT_CSD_CARD_TYPE_HS_52 (1<<1) /* Card can run at
>> >> > 52MHz */
>> >> > #define EXT_CSD_CARD_TYPE_HS (EXT_CSD_CARD_TYPE_HS_26 | \
>> >> > @@ -370,6 +370,10 @@ struct _mmc_csd {
>> >> > /* SDR mode @1.2V I/O */
>> >> > #define EXT_CSD_CARD_TYPE_HS200
>> >> > (EXT_CSD_CARD_TYPE_HS200_1_8V | \
>> >> > EXT_CSD_CARD_TYPE_HS200_1_2V)
>> >> > +#define EXT_CSD_CARD_TYPE_HS400_1_8V (1<<6) /* Card can run at
>> >> > 200MHz DDR, 1.8V */
>> >> > +#define EXT_CSD_CARD_TYPE_HS400_1_2V (1<<7) /* Card can run at
>> >> > 200MHz DDR, 1.2V */
>> >> > +#define EXT_CSD_CARD_TYPE_HS400
>> >> > (EXT_CSD_CARD_TYPE_HS400_1_8V | \
>> >> > + EXT_CSD_CARD_TYPE_HS400_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 */
>> >> > @@ -380,6 +384,7 @@ struct _mmc_csd {
>> >> > #define EXT_CSD_TIMING_BC 0 /* Backwards compatility */
>> >> > #define EXT_CSD_TIMING_HS 1 /* High speed */
>> >> > #define EXT_CSD_TIMING_HS200 2 /* HS200 */
>> >> > +#define EXT_CSD_TIMING_HS400 3 /* HS400 */
>> >> >
>> >> > #define EXT_CSD_SEC_ER_EN BIT(0)
>> >> > #define EXT_CSD_SEC_BD_BLK_EN BIT(2)
>> >> > --
>> >> > 1.7.0.4
>> >> >
>> >> >
>> >>
>> >> Kind regards
>> >> Ulf Hansson
>> >> --
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