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| author | Ludovic Barre <ludovic.barre@st.com> | 2019-10-08 11:56:02 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-11-13 16:10:16 +0100 |
| commit | 8266c585f4897ceff0959bd64d196f164caa0601 (patch) | |
| tree | a59e6a2e8dc7567aa437d8cbb587af0b7dfc5cb9 /drivers/mmc/host/mmci.h | |
| parent | e2b98d83ff0c1aaba31c767673c8000e20ad3524 (diff) | |
| download | linux-8266c585f4897ceff0959bd64d196f164caa0601.tar.bz2 | |
mmc: mmci: add hardware busy timeout feature
In the stm32_sdmmc variant, the datatimer is active not only during
data transfers with the DPSM, but also while waiting for the busyend
IRQs from commands having the MMC_RSP_BUSY flag set. This leads to an
incorrect IRQ being raised to signal MCI_DATATIMEOUT error, which
simply breaks the behaviour.
Address this by updating the datatimer value before sending a command
having the MMC_RSP_BUSY flag set. To inform the mmc core about the
maximum supported busy timeout, which also depends on the current
clock rate, set ->max_busy_timeout (in ms).
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/mmci.h')
| -rw-r--r-- | drivers/mmc/host/mmci.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 833236ecb31e..d8b7f6774e8f 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -287,6 +287,8 @@ struct mmci_host; * @signal_direction: input/out direction of bus signals can be indicated * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock * @busy_detect: true if the variant supports busy detection on DAT0. + * @busy_timeout: true if the variant starts data timer when the DPSM + * enter in Wait_R or Busy state. * @busy_dpsm_flag: bitmask enabling busy detection in the DPSM * @busy_detect_flag: bitmask identifying the bit in the MMCISTATUS register * indicating that the card is busy @@ -333,6 +335,7 @@ struct variant_data { u8 signal_direction:1; u8 pwrreg_clkgate:1; u8 busy_detect:1; + u8 busy_timeout:1; u32 busy_dpsm_flag; u32 busy_detect_flag; u32 busy_detect_mask; |