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authorJerry Huang <Chang-Ming.Huang@freescale.com>2011-01-06 23:42:19 -0600
committerKumar Gala <galak@kernel.crashing.org>2011-01-14 01:32:22 -0600
commitd621da0066dff92a76ca3c6fb031a7f823a811f3 (patch)
tree4ec744b969d1a05484e041f60ba7e3eaf66d1f6a /drivers
parent28a096e7f25d43824618d210b5b20b1961b94d79 (diff)
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fsl_esdhc: Add the workaround for erratum ESDHC111 (enable on P4080)
Do not issue a manual asynchronous CMD12. Instead, use a (software) synchronous CMD12 or AUTOCMD12 to abort data transfer. Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/fsl_esdhc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index cef2859..fe94164 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2007,2010 Freescale Semiconductor, Inc
+ * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
* Andy Fleming
*
* Based vaguely on the pxa mmc code:
@@ -79,6 +79,9 @@ uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
if (data->blocks > 1) {
xfertyp |= XFERTYP_MSBSEL;
xfertyp |= XFERTYP_BCEN;
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
+ xfertyp |= XFERTYP_AC12EN;
+#endif
}
if (data->flags & MMC_DATA_READ)
@@ -234,6 +237,11 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
+ if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
+ return 0;
+#endif
+
esdhc_write32(&regs->irqstat, -1);
sync();