[U-Boot] [PATCH] mmc: fsl_esdhc: add controller reset in case of data related errors too

The controller reset is performed now if command error occurs. This commit adds the reset for the case of data related errors too.

Signed-off-by: Andrew Gabbasov andrew_gabbasov@mentor.com --- drivers/mmc/fsl_esdhc.c | 63 +++++++++++++++++++++++++++-------------------- 1 file changed, 36 insertions(+), 27 deletions(-)

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index f4d3132..dfb1cc3 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -265,6 +265,7 @@ static void check_and_invalidate_dcache_range static int esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) { + int err = 0; uint xfertyp; uint irqstat; struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv; @@ -296,8 +297,6 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)

/* Set up for a data transfer if we have one */ if (data) { - int err; - err = esdhc_setup_data(mmc, data); if(err) return err; @@ -325,27 +324,15 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)

irqstat = esdhc_read32(&regs->irqstat);

- /* Reset CMD and DATA portions on error */ - if (irqstat & (CMD_ERR | IRQSTAT_CTOE)) { - esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) | - SYSCTL_RSTC); - while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC) - ; - - if (data) { - esdhc_write32(&regs->sysctl, - esdhc_read32(&regs->sysctl) | - SYSCTL_RSTD); - while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD)) - ; - } + if (irqstat & CMD_ERR) { + err = COMM_ERR; + goto out; }

- if (irqstat & CMD_ERR) - return COMM_ERR; - - if (irqstat & IRQSTAT_CTOE) - return TIMEOUT; + if (irqstat & IRQSTAT_CTOE) { + err = TIMEOUT; + goto out; + }

/* Workaround for ESDHC errata ENGcm03648 */ if (!data && (cmd->resp_type & MMC_RSP_BUSY)) { @@ -360,7 +347,8 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)

if (timeout <= 0) { printf("Timeout waiting for DAT0 to go high!\n"); - return TIMEOUT; + err = TIMEOUT; + goto out; } }

@@ -387,20 +375,41 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) do { irqstat = esdhc_read32(&regs->irqstat);

- if (irqstat & IRQSTAT_DTOE) - return TIMEOUT; + if (irqstat & IRQSTAT_DTOE) { + err = TIMEOUT; + goto out; + }

- if (irqstat & DATA_ERR) - return COMM_ERR; + if (irqstat & DATA_ERR) { + err = COMM_ERR; + goto out; + } } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE); #endif if (data->flags & MMC_DATA_READ) check_and_invalidate_dcache_range(cmd, data); }

+out: + /* Reset CMD and DATA portions on error */ + if (err) { + esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) | + SYSCTL_RSTC); + while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC) + ; + + if (data) { + esdhc_write32(&regs->sysctl, + esdhc_read32(&regs->sysctl) | + SYSCTL_RSTD); + while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD)) + ; + } + } + esdhc_write32(&regs->irqstat, -1);

- return 0; + return err; }

static void set_sysctl(struct mmc *mmc, uint clock)