diff options
| -rw-r--r-- | drivers/mmc/fsl_esdhc.c | 17 | ||||
| -rw-r--r-- | include/fsl_esdhc.h | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index 85354e8..999b581 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -344,6 +344,20 @@ static int esdhc_init(struct mmc *mmc) return ret; } +static void esdhc_reset(struct fsl_esdhc *regs) +{ + unsigned long timeout = 100; /* wait max 100 ms */ + + /* reset the controller */ + esdhc_write32(®s->sysctl, SYSCTL_RSTA); + + /* hardware clears the bit when it is done */ + while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout) + udelay(1000); + if (!timeout) + printf("MMC/SD: Reset never completed.\n"); +} + int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) { struct fsl_esdhc *regs; @@ -358,6 +372,9 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) sprintf(mmc->name, "FSL_ESDHC"); regs = (struct fsl_esdhc *)cfg->esdhc_base; + /* First reset the eSDHC controller */ + esdhc_reset(regs); + mmc->priv = cfg; mmc->send_cmd = esdhc_send_cmd; mmc->set_ios = esdhc_set_ios; diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h index 57a08cd..5f02018 100644 --- a/include/fsl_esdhc.h +++ b/include/fsl_esdhc.h @@ -39,6 +39,7 @@ #define SYSCTL_PEREN 0x00000004 #define SYSCTL_HCKEN 0x00000002 #define SYSCTL_IPGEN 0x00000001 +#define SYSCTL_RSTA 0x01000000 #define IRQSTAT 0x0002e030 #define IRQSTAT_DMAE (0x10000000) |