diff options
| author | Jingchang Lu <b35083@freescale.com> | 2012-07-03 13:21:44 +0800 |
|---|---|---|
| committer | Justin Waters <justin.waters@timesys.com> | 2012-09-07 15:22:42 -0400 |
| commit | 56c5b506f71dfe063807c6e837ce06c265a6df65 (patch) | |
| tree | c7e4a6f3dead87c88b294ce82e147b2b09e64cd6 | |
| parent | 98f181be8e400434698fd89b13e04dbda9e8935d (diff) | |
Add eSDHC support for Vybrid platform
On some platform, such as vybrid, there is no scr register,
but the dis-order excution may wrongly excute the register write.
The barrier used to prevent this.
Signed-off-by: Jason Jin <Jason.jin@freescale.com>
| -rw-r--r-- | drivers/mmc/fsl_esdhc.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index a2f35e3e99..e8b304ab2f 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -1,5 +1,5 @@ /* - * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc + * Copyright 2007, 2010-2012 Freescale Semiconductor, Inc * Andy Fleming * * Based vaguely on the pxa mmc code: @@ -428,8 +428,11 @@ static int esdhc_init(struct mmc *mmc) udelay(1000); /* Enable cache snooping */ - if (cfg && !cfg->no_snoop) + + if (cfg && !cfg->no_snoop) { + asm volatile("" ::: "memory"); esdhc_write32(®s->scr, 0x00000040); + } esdhc_write32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN); @@ -542,6 +545,9 @@ int fsl_esdhc_mmc_init(bd_t *bis) cfg = malloc(sizeof(struct fsl_esdhc_cfg)); memset(cfg, 0, sizeof(struct fsl_esdhc_cfg)); cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR; +#ifdef CONFIG_ESDHC_NO_SNOOP + cfg->no_snoop = 1; +#endif return fsl_esdhc_initialize(bis, cfg); } |