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mmc: omap_hsmmc: reset FSM for DAT and CMD lines if needed before a new command

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It sometimes happen that the PSTATE register does not indicate that the
bus is ready when it really is. This usually happens after a mode switch.
In that case it makes sense to reset the FSM handling the CMD and DATA

Also reset the FSMs if the STATE register cannot be cleared. This also
sometimes happens after a mode switch.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
This commit is contained in:
Jean-Jacques Hiblot
2019-07-02 10:53:48 +02:00
committed by Peng Fan
parent 24b1e0c7e2
commit b2ffa3320a
1 changed files with 6 additions and 7 deletions
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13
drivers/mmc/omap_hsmmc.c
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@@ -1065,18 +1065,17 @@ static int omap_hsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting on cmd inhibit to clear\n",
__func__);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
return -ETIMEDOUT;
}
}
writel(0xFFFFFFFF, &mmc_base->stat);
start = get_timer(0);
while (readl(&mmc_base->stat)) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for STAT (%x) to clear\n",
__func__, readl(&mmc_base->stat));
return -ETIMEDOUT;
}
if (readl(&mmc_base->stat)) {
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
}
/*
* CMDREG
* CMDIDX[13:8] : Command index