On Mon, July 9, 2012 10:54 pm, Chris Ball wrote: > Hi, > > On Fri, Jun 29 2012, Seungwon Jeon wrote: >> This patch adds packed command feature of eMMC4.5. >> The maximum number for packing read(or write) is offered >> and exception event relevant to packed command which is >> used for error handling is enabled. If host wants to use >> this feature, MMC_CAP2_PACKED_CMD should be set. >> >> Signed-off-by: Seungwon Jeon <[email protected]> >> Reviewed-by: Maya Erez <[email protected]> >> Reviewed-by: Subhash Jadavani <[email protected]> >> Reviewed-by: Namjae Jeon <[email protected]> >> --- >> drivers/mmc/core/mmc.c | 25 +++++++++++++++++++++++++ >> include/linux/mmc/card.h | 3 +++ >> include/linux/mmc/host.h | 4 ++++ >> include/linux/mmc/mmc.h | 15 +++++++++++++++ >> 4 files changed, 47 insertions(+), 0 deletions(-) >> >> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c >> index 258b203..bfb271f 100644 >> --- a/drivers/mmc/core/mmc.c >> +++ b/drivers/mmc/core/mmc.c >> @@ -516,6 +516,11 @@ static int mmc_read_ext_csd(struct mmc_card *card, >> u8 *ext_csd) >> } else { >> card->ext_csd.data_tag_unit_size = 0; >> } >> + >> + card->ext_csd.max_packed_writes = >> + ext_csd[EXT_CSD_MAX_PACKED_WRITES]; >> + card->ext_csd.max_packed_reads = >> + ext_csd[EXT_CSD_MAX_PACKED_READS]; >> } else { >> card->ext_csd.data_sector_size = 512; >> } >> @@ -1246,6 +1251,26 @@ static int mmc_init_card(struct mmc_host *host, >> u32 ocr, >> } >> } >> >> + if ((host->caps2 & MMC_CAP2_PACKED_WR && >> + card->ext_csd.max_packed_writes > 0) || >> + (host->caps2 & MMC_CAP2_PACKED_RD && >> + card->ext_csd.max_packed_reads > 0)) { >> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, >> + EXT_CSD_EXP_EVENTS_CTRL, >> + EXT_CSD_PACKED_EVENT_EN, >> + card->ext_csd.generic_cmd6_time); > > Sorry, I don't have a copy of the eMMC 4.5 spec -- is PACKED_EVENT_EN > a one-time programmable fuse on the eMMC, like BKOPS_ENABLE was? > > Thanks, > > - Chris. > -- > Chris Ball <[email protected]> <http://printf.net/> > One Laptop Per Child
No, it's not. -- Sent by consultant of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum -- 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
