sdhci spec 3.0 has some difference, and here is patch to add support.
>From 25eeab5e3b58128600968e5600aeaf9390c067d8 Mon Sep 17 00:00:00 2001
From: Zhangfei Gao <zgao6@xxxxxxxxxxx>
Date: Fri, 6 Aug 2010 05:47:59 +0800
Subject: [PATCH] sdhci: aligh with sdhc spec 3.00
1. support 8 bit data transfer width
2. support 10-bit Divided Clock Mode
Signed-off-by: Zhangfei Gao <zgao6@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 15 +++++++++++----
drivers/mmc/host/sdhci.h | 5 +++++
2 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c6d1bd8..89b323e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1002,7 +1002,8 @@ static void sdhci_set_clock(struct sdhci_host
*host, unsigned int clock)
}
div >>= 1;
- clk = div << SDHCI_DIVIDER_SHIFT;
+ clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
+ clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIVIDER_SHIFT) <<
SDHCI_DIVIDER_SHIFT_HI;
clk |= SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
@@ -1159,10 +1160,16 @@ static void sdhci_set_ios(struct mmc_host
*mmc, struct mmc_ios *ios)
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
- if (ios->bus_width == MMC_BUS_WIDTH_4)
+ if (ios->bus_width == MMC_BUS_WIDTH_8) {
+ ctrl |= SDHCI_CTRL_8BITBUS;
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
ctrl |= SDHCI_CTRL_4BITBUS;
- else
+ ctrl &= ~SDHCI_CTRL_8BITBUS;
+ } else {
ctrl &= ~SDHCI_CTRL_4BITBUS;
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ }
if (ios->timing == MMC_TIMING_SD_HS)
ctrl |= SDHCI_CTRL_HISPD;
@@ -1681,7 +1688,7 @@ int sdhci_add_host(struct sdhci_host *host)
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
host->version = (host->version & SDHCI_SPEC_VER_MASK)
>> SDHCI_SPEC_VER_SHIFT;
- if (host->version > SDHCI_SPEC_200) {
+ if (host->version > SDHCI_SPEC_300) {
printk(KERN_ERR "%s: Unknown controller version (%d). "
"You may experience problems.\n", mmc_hostname(mmc),
host->version);
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c846813..2cb14eb 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -72,6 +72,7 @@
#define SDHCI_CTRL_ADMA1 0x08
#define SDHCI_CTRL_ADMA32 0x10
#define SDHCI_CTRL_ADMA64 0x18
+#define SDHCI_CTRL_8BITBUS 0x20
#define SDHCI_POWER_CONTROL 0x29
#define SDHCI_POWER_ON 0x01
@@ -85,6 +86,9 @@
#define SDHCI_CLOCK_CONTROL 0x2C
#define SDHCI_DIVIDER_SHIFT 8
+#define SDHCI_DIVIDER_SHIFT_HI 6
+#define SDHCI_DIV_MASK 0xFF
+#define SDHCI_DIV_HI_MASK 0x300
#define SDHCI_CLOCK_CARD_EN 0x0004
#define SDHCI_CLOCK_INT_STABLE 0x0002
#define SDHCI_CLOCK_INT_EN 0x0001
@@ -177,6 +181,7 @@
#define SDHCI_SPEC_VER_SHIFT 0
#define SDHCI_SPEC_100 0
#define SDHCI_SPEC_200 1
+#define SDHCI_SPEC_300 2
struct sdhci_ops;
--
1.6.0.4
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