ARM: 6032/1: ARM: MMCI: support 8bit mode on the ST Micro version
This adds support for an 8bit wide bus to the card (data lines
MCIDAT0 through 7 exist) on the ST Micro version and alters the
U300 platform to support this. Also add some ST_ prefix to the
ST-specific registers.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 84c103a..7e70c1a 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -55,14 +55,16 @@
host->cclk = host->mclk / (2 * (clk + 1));
}
if (host->hw_designer == AMBA_VENDOR_ST)
- clk |= MCI_FCEN; /* Bug fix in ST IP block */
+ clk |= MCI_ST_FCEN; /* Bug fix in ST IP block */
clk |= MCI_CLK_ENABLE;
/* This hasn't proven to be worthwhile */
/* clk |= MCI_CLK_PWRSAVE; */
}
if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
- clk |= MCI_WIDE_BUS;
+ clk |= MCI_4BIT_BUS;
+ if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
+ clk |= MCI_ST_8BIT_BUS;
writel(clk, host->base + MMCICLOCK);
}
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 1ceb9a9..d77062e 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -25,9 +25,11 @@
#define MCI_CLK_ENABLE (1 << 8)
#define MCI_CLK_PWRSAVE (1 << 9)
#define MCI_CLK_BYPASS (1 << 10)
-#define MCI_WIDE_BUS (1 << 11)
+#define MCI_4BIT_BUS (1 << 11)
+/* 8bit wide buses supported in ST Micro versions */
+#define MCI_ST_8BIT_BUS (1 << 12)
/* HW flow control on the ST Micro version */
-#define MCI_FCEN (1 << 13)
+#define MCI_ST_FCEN (1 << 13)
#define MMCIARGUMENT 0x008
#define MMCICOMMAND 0x00c