From: Major Lee <major_lee@xxxxxxxxxxx>
And hook platform_8bit_width to support 8-bit bus width.
Signed-off-by: Major Lee <major_lee@xxxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: Dirk Brandewie <dirk.brandewie@xxxxxxxxx>
---
drivers/mmc/host/sdhci-pci.c | 33 +++++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 936bbca..e1ae855 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -143,6 +143,12 @@ static const struct sdhci_pci_fixes sdhci_cafe = {
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
};
+static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
+{
+ slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
+ return 0;
+}
+
/*
* ADMA operation is disabled for Moorestown platform due to
* hardware bugs.
@@ -159,6 +165,7 @@ static int mrst_hc_probe(struct sdhci_pci_chip *chip)
static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
.quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
+ .probe_slot = mrst_hc_probe_slot,
};
static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
@@ -789,8 +796,34 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host)
return 0;
}
+static int sdhci_pci_8bit_width(struct sdhci_host *host, int width)
+{
+ u8 ctrl;
+
+ ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+
+ switch (width) {
+ case MMC_BUS_WIDTH_8:
+ ctrl |= SDHCI_CTRL_8BITBUS;
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ break;
+ case MMC_BUS_WIDTH_4:
+ ctrl |= SDHCI_CTRL_4BITBUS;
+ ctrl &= ~SDHCI_CTRL_8BITBUS;
+ break;
+ default:
+ ctrl &= ~(SDHCI_CTRL_8BITBUS | SDHCI_CTRL_4BITBUS);
+ break;
+ }
+
+ sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+
+ return 0;
+}
+
static struct sdhci_ops sdhci_pci_ops = {
.enable_dma = sdhci_pci_enable_dma,
+ .platform_8bit_width = sdhci_pci_8bit_width,
};
/*****************************************************************************\
--
1.7.4.4
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