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path: root/drivers/mmc/gen_atmel_mci.c
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Diffstat (limited to 'drivers/mmc/gen_atmel_mci.c')
-rw-r--r--drivers/mmc/gen_atmel_mci.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c
index da870c646e..0474a15484 100644
--- a/drivers/mmc/gen_atmel_mci.c
+++ b/drivers/mmc/gen_atmel_mci.c
@@ -36,6 +36,7 @@ struct atmel_mci_priv {
struct mmc_config cfg;
struct atmel_mci *mci;
unsigned int initialized:1;
+ unsigned int curr_clk;
};
/* Read Atmel MCI IP version */
@@ -91,7 +92,10 @@ static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen)
}
}
-
+ if (version >= 0x500)
+ priv->curr_clk = bus_hz / (clkdiv * 2 + clkodd + 2);
+ else
+ priv->curr_clk = (bus_hz / (clkdiv + 1)) / 2;
blklen &= 0xfffc;
mr = MMCI_BF(CLKDIV, clkdiv);
@@ -118,8 +122,6 @@ static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen)
if (mmc->card_caps & mmc->cfg->host_caps & MMC_MODE_HS)
writel(MMCI_BIT(HSMODE), &mci->cfg);
- udelay(50);
-
priv->initialized = 1;
}
@@ -323,6 +325,13 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
}
}
+ /*
+ * After the switch command, wait for 8 clocks before the next
+ * command
+ */
+ if (cmd->cmdidx == MMC_CMD_SWITCH)
+ udelay(8*1000000 / priv->curr_clk); /* 8 clk in us */
+
return 0;
}