Dear, Seungwon.
On 03/10/2014 08:59 PM, Seungwon Jeon wrote:
> On Mon, March 10, 2014, Jaehoon Chung wrote:
>> On 03/07/2014 11:36 PM, Seungwon Jeon wrote:
>>> Device types which are supported by both host and device
>>> can be identified when EXT_CSD is read. There is no need to
>>> check host's capability anymore.
>>>
>>> Signed-off-by: Seungwon Jeon <tgih.jun@xxxxxxxxxxx>
>>> ---
>>> Changes in v2:
>>> Just rebased with latest one.
>>>
>>> drivers/mmc/core/mmc.c | 77 ++++++++++++++++++++++++++-------------------
>>> include/linux/mmc/card.h | 6 ++-
>>> include/linux/mmc/host.h | 6 ---
>>> include/linux/mmc/mmc.h | 12 +++++--
>>> 4 files changed, 56 insertions(+), 45 deletions(-)
>>>
>>> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
>>> index db9655f..0abece0 100644
>>> --- a/drivers/mmc/core/mmc.c
>>> +++ b/drivers/mmc/core/mmc.c
>>> @@ -243,28 +243,46 @@ static void mmc_select_card_type(struct mmc_card *card)
>>> u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
>>> u32 caps = host->caps, caps2 = host->caps2;
>>> unsigned int hs_max_dtr = 0;
>>> + unsigned int avail_type = 0;
>>>
>>> - if (card_type & EXT_CSD_CARD_TYPE_26)
>>> + if (caps & MMC_CAP_MMC_HIGHSPEED &&
>>> + card_type & EXT_CSD_CARD_TYPE_HS_26) {
>>> hs_max_dtr = MMC_HIGH_26_MAX_DTR;
>>> + avail_type |= EXT_CSD_CARD_TYPE_HS_26;
>>> + }
>>>
>>> if (caps & MMC_CAP_MMC_HIGHSPEED &&
>>> - card_type & EXT_CSD_CARD_TYPE_52)
>>> + card_type & EXT_CSD_CARD_TYPE_HS_52) {
>>> hs_max_dtr = MMC_HIGH_52_MAX_DTR;
>>> + avail_type |= EXT_CSD_CARD_TYPE_HS_52;
>>> + }
>> Can it bind with "caps & MMC_CAP_MMC_HIGHSPEED"?
> Yes, 'nested if' may be possible here.
> I just think current style is more harmonious though.
Don't mind. it's ok. :)
>
>> if (caps & MMC_CAP_MMC_HIGH_SPEED) {
>> if (card_type & EXT_CSD_CARD_TYPE_HS_26) {
>> ...
>> }
>> if (card_type & EXT_CSD_CARD_TYPE_HS_52) {
>> ...
>> }
>> }
>>>
>>> - if ((caps & MMC_CAP_1_8V_DDR &&
>>> - card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
>>> - (caps & MMC_CAP_1_2V_DDR &&
>>> - card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
>>> + if (caps & MMC_CAP_1_8V_DDR &&
>>> + card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
>>> hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
>>> + avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
>>> + }
>>>
>>> - if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
>>> - card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
>>> - (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
>>> - card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
>>> + if (caps & MMC_CAP_1_2V_DDR &&
>>> + card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
>>> + hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
>>> + avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
>>> + }
>>> +
>>> + if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
>>> + card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
>>> hs_max_dtr = MMC_HS200_MAX_DTR;
>>> + avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
>>> + }
>>> +
>>> + if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
>>> + card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
>>> + hs_max_dtr = MMC_HS200_MAX_DTR;
>>> + avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
>>> + }
>>>
>>> card->ext_csd.hs_max_dtr = hs_max_dtr;
>>> - card->ext_csd.card_type = card_type;
>>> + card->mmc_avail_type = avail_type;
>>> }
>>>
>>> /*
>>> @@ -708,6 +726,11 @@ static struct device_type mmc_type = {
>>> .groups = mmc_attr_groups,
>>> };
>>>
>>> +static inline unsigned int mmc_snoop_ddr(struct mmc_card *card)
>>> +{
>>> + return card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
>>> +}
>>> +
>>> /*
>>> * Select the PowerClass for the current bus width
>>> * If power class is defined for 4/8 bit bus in the
>>> @@ -808,12 +831,10 @@ static int mmc_select_hs200(struct mmc_card *card)
>>>
>>> host = card->host;
>>>
>>> - if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
>>> - host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
>>> + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
>>> err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
>>>
>>> - if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
>>> - host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
>>> + if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
>>> err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
>>>
>>> /* If fails try again during next card power cycle */
>>> @@ -1072,10 +1093,9 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>>> */
>>> if (card->ext_csd.hs_max_dtr != 0) {
>>> err = 0;
>>> - if (card->ext_csd.hs_max_dtr > 52000000 &&
>>> - host->caps2 & MMC_CAP2_HS200)
>> MMC_CAP2_HS200 need no more, doesn't?
> If you mean to remove 'MMC_CAP2_HS200' definition, it is currently used in sdhci.c
I have also checked that it is used in sdhci.c.
but I think that capability like MMC_CAP2_HS200 was defined to use for core, not controller.
It can be changed other quirks instead of MMC_CAP2_HS200 into sdhci.c
how about?
Best Regards,
Jaehoon Chung
>
> Thanks,
> Seungwon Jeon
>
>>
>>> + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
>>> err = mmc_select_hs200(card);
>>> - else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
>>> + else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
>>> err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>>> EXT_CSD_HS_TIMING, 1,
>>> card->ext_csd.generic_cmd6_time,
>>> @@ -1089,13 +1109,11 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>>> mmc_hostname(card->host));
>>> err = 0;
>>> } else {
>>> - if (card->ext_csd.hs_max_dtr > 52000000 &&
>>> - host->caps2 & MMC_CAP2_HS200) {
>>> + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
>>> mmc_set_timing(card->host,
>>> MMC_TIMING_MMC_HS200);
>>> - } else {
>>> + else
>>> mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
>>> - }
>>> }
>>> }
>>>
>>> @@ -1118,14 +1136,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>>> /*
>>> * Indicate DDR mode (if supported).
>>> */
>>> - if (mmc_card_hs(card)) {
>>> - if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
>>> - && (host->caps & MMC_CAP_1_8V_DDR))
>>> - ddr = MMC_1_8V_DDR_MODE;
>>> - else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
>>> - && (host->caps & MMC_CAP_1_2V_DDR))
>>> - ddr = MMC_1_2V_DDR_MODE;
>>> - }
>>> + if (mmc_card_hs(card))
>>> + ddr = mmc_snoop_ddr(card);
>>>
>>> /*
>>> * Indicate HS200 SDR mode (if supported).
>>> @@ -1145,8 +1157,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>>> * 3. set the clock to > 52Mhz <=200MHz and
>>> * 4. execute tuning for HS200
>>> */
>>> - if ((host->caps2 & MMC_CAP2_HS200) &&
>>> - card->host->ops->execute_tuning) {
>>> + if (card->host->ops->execute_tuning) {
>>> mmc_host_clk_hold(card->host);
>>> err = card->host->ops->execute_tuning(card->host,
>>> MMC_SEND_TUNING_BLOCK_HS200);
>>> @@ -1255,7 +1266,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>>> *
>>> * WARNING: eMMC rules are NOT the same as SD DDR
>>> */
>>> - if (ddr == MMC_1_2V_DDR_MODE) {
>>> + if (ddr & EXT_CSD_CARD_TYPE_DDR_1_2V) {
>>> err = __mmc_set_signal_voltage(host,
>>> MMC_SIGNAL_VOLTAGE_120);
>>> if (err)
>>> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
>>> index 5473133..c232b10 100644
>>> --- a/include/linux/mmc/card.h
>>> +++ b/include/linux/mmc/card.h
>>> @@ -68,7 +68,6 @@ struct mmc_ext_csd {
>>> #define MMC_HIGH_DDR_MAX_DTR 52000000
>>> #define MMC_HS200_MAX_DTR 200000000
>>> unsigned int sectors;
>>> - unsigned int card_type;
>>> unsigned int hc_erase_size; /* In sectors */
>>> unsigned int hc_erase_timeout; /* In milliseconds */
>>> unsigned int sec_trim_mult; /* Secure trim multiplier */
>>> @@ -297,7 +296,10 @@ struct mmc_card {
>>> const char **info; /* info strings */
>>> struct sdio_func_tuple *tuples; /* unknown common tuples */
>>>
>>> - unsigned int sd_bus_speed; /* Bus Speed Mode set for the card */
>>> + union {
>>> + unsigned int sd_bus_speed; /* Bus Speed Mode set for the card */
>>> + unsigned int mmc_avail_type; /* supported device type by both host and card */
>>> + };
>>>
>>> struct dentry *debugfs_root;
>>> struct mmc_part part[MMC_NUM_PHY_PARTITION]; /* physical partitions */
>>> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
>>> index 2f263ae..1ee3c10 100644
>>> --- a/include/linux/mmc/host.h
>>> +++ b/include/linux/mmc/host.h
>>> @@ -62,12 +62,6 @@ struct mmc_ios {
>>> #define MMC_TIMING_MMC_DDR52 8
>>> #define MMC_TIMING_MMC_HS200 9
>>>
>>> -#define MMC_SDR_MODE 0
>>> -#define MMC_1_2V_DDR_MODE 1
>>> -#define MMC_1_8V_DDR_MODE 2
>>> -#define MMC_1_2V_SDR_MODE 3
>>> -#define MMC_1_8V_SDR_MODE 4
>>> -
>>> unsigned char signal_voltage; /* signalling voltage (1.8V or 3.3V) */
>>>
>>> #define MMC_SIGNAL_VOLTAGE_330 0
>>> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
>>> index 50bcde3..f734c0c 100644
>>> --- a/include/linux/mmc/mmc.h
>>> +++ b/include/linux/mmc/mmc.h
>>> @@ -354,18 +354,22 @@ struct _mmc_csd {
>>> #define EXT_CSD_CMD_SET_SECURE (1<<1)
>>> #define EXT_CSD_CMD_SET_CPSECURE (1<<2)
>>>
>>> -#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_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 | \
>>> + EXT_CSD_CARD_TYPE_HS_52)
>>> #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_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 */
>>> +#define EXT_CSD_CARD_TYPE_HS200_1_8V (1<<4) /* Card can run at 200MHz */
>>> +#define EXT_CSD_CARD_TYPE_HS200_1_2V (1<<5) /* Card can run at 200MHz */
>>> /* 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_BUS_WIDTH_1 0 /* Card is in 1 bit mode */
>>> #define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */
>>>
>>
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