mirror/u-boot-2016
1
0
Fork 0
mirror of https://git.codelinaro.org/clo/qsdk/oss/boot/u-boot-2016.git synced 2026-03-10 03:07:16 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

driver: mmc: sdhci: Add condition for DAT inhibit bit.

Browse source 
This change will handle masking of DAT inhibit bit of
present state register. This status bit is genarated if
either the DAT Line Active or Read Transfer Active is set to
1. If this bit is 0, it indicates the host controller can issue
the next command.

Commands with busy signal belong to Command Inhibit(DAT).
e.g (R1b, R5b type).

Changing from 1 to 0 generates a transfer complete interrupt
in normal interrupt status register.

If this bit value is 1: Cannot issue command which uses DAT line.
If this bit value is 0: Can issue command which uses DAT line.

This change is masking SDHCI_DATA_INHIBIT bit only if card is in
busy state.

Without this change we can get the erase timeout error.
error:
MMC erase: dev # 0, block # 27682, count 16383 ...
sdhci_send_command: MMC: 0 busy timeout increasing to: 2000 ms.

Change-Id: I0612e576c09a7fd077bed1a1ee717afcddfa7e87
Signed-off-by: Md Sadre Alam <mdalam@codeaurora.org>
This commit is contained in:
Md Sadre Alam 2019-02-19 20:53:10 +05:30
parent d917f0032a
commit ca63b592db
1 changed files with 4 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/mmc/sdhci.c
View file

@ -252,7 +252,10 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
static unsigned int cmd_timeout = CONFIG_SDHCI_CMD_DEFAULT_TIMEOUT;
sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT;
mask = SDHCI_CMD_INHIBIT;
if ((data != NULL) || (cmd->resp_type & MMC_RSP_BUSY))
mask |= SDHCI_DATA_INHIBIT;
/* We shouldn't wait for data inihibit for stop commands, even
though they might use busy signaling */