Hi Jackey, On Thur, November 07, 2013, Shen, Jackey wrote > Hi Seungwon, > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] > > On Behalf Of Seungwon Jeon > > Sent: Tuesday, November 05, 2013 9:28 PM > > To: 'Chris Ball'; 'Ulf Hansson' > > Cc: [email protected] > > Subject: [PATCH 3/3] mmc: add support for hs400 mode of eMMC5.0 > > > > This patch adds HS400 mode support for eMMC5.0 device. > > HS400 mode is high speed DDDR interface timing from HS200. > > DDDR should be DDR. Ok. Thanks.
> > > 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]> > > --- > > drivers/mmc/core/bus.c | 3 +- > > drivers/mmc/core/mmc.c | 128 > > +++++++++++++++++++++++++++++++++++++++++++-- > > - > > include/linux/mmc/card.h | 10 +++- > > include/linux/mmc/host.h | 6 ++ > > include/linux/mmc/mmc.h | 8 +++- > > 5 files changed, 144 insertions(+), 11 deletions(-) > > > > diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c > > index cdca8a7..fd4ba2b 100644 > > --- a/drivers/mmc/core/bus.c > > +++ b/drivers/mmc/core/bus.c > > @@ -351,10 +351,11 @@ int mmc_add_card(struct mmc_card *card) > > mmc_card_ddr_mode(card) ? "DDR " : "", > > type); > > } else { > > - pr_info("%s: new %s%s%s%s%s card at address %04x\n", > > + pr_info("%s: new %s%s%s%s%s%s card at address %04x\n", > > mmc_hostname(card->host), > > mmc_card_uhs(card) ? "ultra high speed " : > > (mmc_card_highspeed(card) ? "high speed " : ""), > > + mmc_card_hs400(card) ? "HS400 " : "", > > I think the following line will be better: > mmc_card_hs400(card) ? "HS400 " : Ok. > > > (mmc_card_hs200(card) ? "HS200 " : ""), > > mmc_card_ddr_mode(card) ? "DDR " : "", > > uhs_bus_speed_mode, type, card->rca); > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c > > index 1668ea4..7c23b67 100644 > > --- a/drivers/mmc/core/mmc.c > > +++ b/drivers/mmc/core/mmc.c > > @@ -280,6 +280,18 @@ static void mmc_select_card_type(struct mmc_card *card) > > avail_type |= EXT_CSD_CARD_TYPE_SDR_1_2V; > > } > > > > + if (caps2 & MMC_CAP2_HS400_1_8V && > > + card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { > > Only 1 byte for ext_csd.raw_card_type as per eMMC spec, so I suggest: > 1. remove EXT_CSD_CARD_TYPE_MASK > 2. card_type is initialized as: > u8 card_type = card->ext_csd.raw_card_type; Yes. It seems no more need. > > > + 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) { > > See above comments. > > > + 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->ext_csd.card_type = card_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; > > > > @@ -780,7 +797,9 @@ static int __mmc_select_powerclass(struct mmc_card > > *card, > > 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; > > + pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? > > + card->ext_csd.raw_pwr_cl_ddr_200_360 : > > + card->ext_csd.raw_pwr_cl_200_360; > > break; > > default: > > pr_warning("%s: Voltage range not supported " > > @@ -808,7 +827,8 @@ static int __mmc_select_powerclass(struct mmc_card > > *card, > > > > static inline unsigned int mmc_snoop_ddr(struct mmc_card *card) > > { > > - return card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; > > + return card->mmc_avail_type & > > + (EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_HS400); > > } > > > > static int mmc_select_powerclass(struct mmc_card *card, u8 *ext_csd) > > @@ -858,7 +878,7 @@ static void mmc_set_bus_speed(struct mmc_card *card) > > > > BUG_ON(!card); > > > > - if (mmc_card_hs200(card)) { > > + if (mmc_card_hs200(card) || mmc_card_hs400(card)) { > > if (max_dtr > card->ext_csd.hs200_max_dtr) > > max_dtr = card->ext_csd.hs200_max_dtr; > > } else if (mmc_card_highspeed(card)) { > > @@ -967,6 +987,31 @@ 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) > > +{ > > + BUG_ON(!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. > > + */ > > + mmc_card_set_highspeed(card); > > + 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, u8 *ext_csd) > > @@ -1026,6 +1071,61 @@ static int mmc_select_hs_ddr(struct mmc_card *card, > > u8 > > *ext_csd) > > return err; > > } > > > > +static int mmc_select_hs400(struct mmc_card *card, u8 *ext_csd) > > +{ > > + struct mmc_host *host; > > + int err = 0, ddr; > > + > > + BUG_ON(!card); > > + > > + host = card->host; > > + > > + ddr = mmc_snoop_ddr(card); > > + > > + /* > > + * The bus width is set to only 8 DDR in HS400 mode > > + */ > > + if (!(ddr & EXT_CSD_CARD_TYPE_HS400 && > > + card->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) > > This rule is defined by eMMC spec as we know. > Does eMMC card you're testing support to switch to HS400 timing directly? If you mean switch to HS400 from power-on, it doesn't support. > > > + */ > > + err = mmc_revert_to_hs(card); > > + if (err) { > > + pr_warn("%s: switch to high-speed from hs200 failed, err:%d\n", > > + mmc_hostname(card->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(card->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(card->host), err); > > + return err; > > + } > > + > > + mmc_card_set_hs400(card); > > + mmc_set_timing(card->host, MMC_TIMING_MMC_HS400); > > + mmc_set_bus_speed(card); > > There is no code in your patch set to do this work (set timing and bus width) > for MMC host controller. Is this controller Synopsys DesignWare MMC host > controller? > As we know, DesignWare MMC host controller is used in Exynos 5420 (SMDK5420), > which supports eMMC 5.0 card. > Will you submit these patches later? Sure, I could send before not long before. I already have completed to test. > > > + > > + return 0; > > +} > > + > > /* > > * For device supporting HS200 mode, the following sequence > > * should be done before executing the tuning process. > > @@ -1061,10 +1161,19 @@ static int mmc_select_hs200(struct mmc_card *card) > > err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, > > EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS200, > > card->ext_csd.generic_cmd6_time); > > - if (!err) { > > - mmc_card_set_hs200(card); > > + if (err) > > + goto err; > > + > > + mmc_card_set_hs200(card); > > + > > + 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); > > + else > > mmc_set_timing(host, MMC_TIMING_MMC_HS200); > > - } > > } > > err: > > return err; > > @@ -1114,7 +1223,7 @@ 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) > > { > > @@ -1353,6 +1462,9 @@ 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, ext_csd); > > + if (err) > > + goto err; > > } else if (mmc_card_highspeed(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 f2c2620..3d41869 100644 > > --- a/include/linux/mmc/card.h > > +++ b/include/linux/mmc/card.h > > @@ -111,6 +111,7 @@ 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 */ > > > > @@ -258,12 +259,14 @@ struct mmc_card { > > #define MMC_CARD_SDXC (1<<6) /* card is SDXC */ > > #define MMC_CARD_REMOVED (1<<7) /* card has been removed */ > > #define MMC_STATE_HIGHSPEED_200 (1<<8) /* card is in HS200 > > mode */ > > +#define MMC_STATE_HIGHSPEED_400 (1<<9) /* card is in HS400 > > mode */ > > #define MMC_STATE_DOING_BKOPS (1<<10) /* card is doing BKOPS > > */ > > #define MMC_STATE_SUSPENDED (1<<11) /* card is suspended */ > > #define MMC_STATE_SPEED_MASK (MMC_STATE_HIGHSPEED | \ > > MMC_STATE_HIGHSPEED_DDR | \ > > MMC_STATE_ULTRAHIGHSPEED | \ > > - MMC_STATE_HIGHSPEED_200) > > + MMC_STATE_HIGHSPEED_200 | \ > > + MMC_STATE_HIGHSPEED_400) > > /* Mask for default speed(DS) */ > > unsigned int quirks; /* card quirks */ > > #define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 > > writes outside > > of the VS CCCR range */ > > @@ -428,6 +431,7 @@ static inline void __maybe_unused remove_quirk(struct > > mmc_card *card, int data) > > #define mmc_card_readonly(c) ((c)->state & MMC_STATE_READONLY) > > #define mmc_card_highspeed(c) ((c)->state & MMC_STATE_HIGHSPEED) > > #define mmc_card_hs200(c) ((c)->state & MMC_STATE_HIGHSPEED_200) > > +#define mmc_card_hs400(c) ((c)->state & MMC_STATE_HIGHSPEED_400) > > #define mmc_card_blockaddr(c) ((c)->state & MMC_STATE_BLOCKADDR) > > #define mmc_card_ddr_mode(c) ((c)->state & MMC_STATE_HIGHSPEED_DDR) > > #define mmc_card_uhs(c) ((c)->state & MMC_STATE_ULTRAHIGHSPEED) > > @@ -456,6 +460,10 @@ static inline void __maybe_unused remove_quirk(struct > > mmc_card *card, int data) > > ((c)->state = \ > > ((c)->state & ~MMC_STATE_SPEED_MASK) | \ > > MMC_STATE_HIGHSPEED_200) > > +#define mmc_card_set_hs400(c) \ > > + ((c)->state = \ > > + ((c)->state & ~MMC_STATE_SPEED_MASK) | \ > > + MMC_STATE_HIGHSPEED_400) > > #define mmc_card_set_uhs(c) \ > > ((c)->state = \ > > ((c)->state & ~MMC_STATE_SPEED_MASK) | \ > > diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h > > index 69d58b1..8e66f4d 100644 > > --- a/include/linux/mmc/host.h > > +++ b/include/linux/mmc/host.h > > @@ -59,6 +59,8 @@ struct mmc_ios { > > #define MMC_TIMING_UHS_SDR104 6 > > #define MMC_TIMING_UHS_DDR50 7 > > #define MMC_TIMING_MMC_HS200 8 > > +#define MMC_TIMING_MMC_HS400 9 > > +#define MMC_TIMING_MMC_HS400_TUNING 10 > > > > unsigned char signal_voltage; /* signalling voltage (1.8V or > > 3.3V) */ > > > > @@ -276,6 +278,10 @@ struct mmc_host { > > MMC_CAP2_PACKED_WR) > > #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up > > before scan */ > > #define MMC_CAP2_SANITIZE (1 << 15) /* Support Sanitize */ > > +#define MMC_CAP2_HS400_1_8V (1 << 16) /* Can support HS400 > > 1.8V */ > > +#define MMC_CAP2_HS400_1_2V (1 << 17) /* 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 */ > > > > diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h > > index 87df508..7d5c27d 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 */ > > @@ -356,7 +357,7 @@ 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 0x3F /* Mask out reserved bits */ > > +#define EXT_CSD_CARD_TYPE_MASK 0xFF /* 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 */ > > @@ -366,6 +367,10 @@ struct _mmc_csd { > > #define EXT_CSD_CARD_TYPE_SDR_1_8V (1<<4) /* Card can run at 200MHz */ > > #define EXT_CSD_CARD_TYPE_SDR_1_2V (1<<5) /* Card can run at 200MHz */ > > /* SDR mode @1.2V I/O */ > > +#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 */ > > @@ -376,6 +381,7 @@ 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 > > > > In addition, for debug purpose for HS400, the following patch segment should > be added in debugfs.c: > > diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c > index 54829c0..e1f075c 100644 > --- a/drivers/mmc/core/debugfs.c > +++ b/drivers/mmc/core/debugfs.c > @@ -138,6 +138,9 @@ static int mmc_ios_show(struct seq_file *s, void *data) > case MMC_TIMING_MMC_HS200: > str = "mmc high-speed SDR200"; > break; > + case MMC_TIMING_MMC_HS400: > + str = "mmc high-speed DDR200"; > + break; > default: > str = "invalid"; > break; Ok. I'll add. > > Besides, may I venture to ask that whether you test on specified hardware and > pass test cases? As you asked above, I tested it with exynos5420. Thanks, Seungwon Jeon -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
