[U-Boot] [PATCH v1 00/11] Improvements on the MMC switch
Jean-Jacques Hiblot
jjhiblot at ti.com
Thu Jun 27 10:31:29 UTC 2019
This series brings some improvements related to the switch command:
- use timeouts specified in the EXT_CSD instead of fixed values
- retry switching partitions a few time before calling it a failure
- make switching mode more reliable by checking the status of operation
afterward.
- make switching faster by using the DAT0 line as a ready/busy signal
- Allow HS200/H400 modes with boot partitions. That didn't work well before
because the switch was not reliable enough.
This has been tested on DRA76-evm and beaglebone black.
Travis build: https://travis-ci.org/jjhiblot/u-boot/builds/550855605
Jean-Jacques Hiblot (11):
mmc: omap_hsmmc: reset FSM for DAT and CMD lines if needed before a
new command
mmc: omap_hsmmc: don't fill the send_init_stream callback
Revert "mmc: Add a new callback function to perform the 74 clocks
cycle sequence"
mmc: omap_hsmmc: provide wait_dat0 even if UHS modes are not supported
mmc: add mmc_poll_for_busy() and change the purpose of
mmc_send_status()
mmc: if possible, poll the busy state using DAT0
mmc: use the generic timeout for cmd6 (SWITCH) provided in the ext_csd
mmc: When switching partition, use the timeout specified in the
ext_csd
mmc: During a switch, poll on dat0 if available and check the final
status
mmc: do not change mode when accessing a boot partition
mmc: retry a few times if a partition switch failed
drivers/mmc/mmc-uclass.c | 15 ----
drivers/mmc/mmc.c | 169 +++++++++++++++++++++-----------------
drivers/mmc/mmc_private.h | 9 +-
drivers/mmc/mmc_write.c | 4 +-
drivers/mmc/omap_hsmmc.c | 26 ++----
include/mmc.h | 19 ++---
6 files changed, 115 insertions(+), 127 deletions(-)
--
2.17.1
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