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| author | Terry Lv <r65388@freescale.com> | 2010-12-29 10:42:50 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2010-12-29 10:42:50 +0800 |
| commit | b189ab8e686fe53e07101c3f7b65305f805151ad (patch) | |
| tree | 24cee5a3464a220b8ea5326e2ad4a31c0a450a4c /drivers/mmc | |
| parent | fb98f374aa425699643cf784850b74e512a40e63 (diff) | |
| download | u-boot-imx-b189ab8e686fe53e07101c3f7b65305f805151ad.zip u-boot-imx-b189ab8e686fe53e07101c3f7b65305f805151ad.tar.gz u-boot-imx-b189ab8e686fe53e07101c3f7b65305f805151ad.tar.bz2 | |
ENGR00136863-2: Fix mx53 CMD12 issue.
As in mx53 and lster socs, when using CMD12, cmdtype need to be set
to ABORT, otherwise, next read command will hang.
This is a software Software Restrictions in spec 29.7.8.
For pre-defined multi-block read operation,
i.e.,
The number of blocks to read has been defined by previous
CMD23 for MMC, or pre-defined number of blocks in CMD53
for SDIO/SDCombo, or whatever multi-block read without abort
command at card side, an abort command, either automatic
or manual CMD12/CMD52, is still required by ESDHCV2 after the
pre-defined number of blocks are done, to drive the internal
state machine to idle mode.
In this case, the card may not respond to this extra
abort command and ESDHCV2 gets Response Timeout.
It is recommended to manually send an abort command with
RSPTYP[1:0] both bits cleared.
Signed-off-by: Terry Lv <r65388@freescale.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/imx_esdhc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/imx_esdhc.c b/drivers/mmc/imx_esdhc.c index c0eaa97..0dff3ca 100644 --- a/drivers/mmc/imx_esdhc.c +++ b/drivers/mmc/imx_esdhc.c @@ -104,6 +104,9 @@ uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data) else if (cmd->resp_type & MMC_RSP_PRESENT) xfertyp |= XFERTYP_RSPTYP_48; + if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION) + xfertyp |= XFERTYP_CMDTYP_ABORT; + return XFERTYP_CMD(cmd->cmdidx) | xfertyp; } |