Add tuning block support for eSDHC.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx>
---
drivers/mmc/host/sdhci-esdhc.h | 5 +++++
drivers/mmc/host/sdhci-of-esdhc.c | 17 +++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index 6869567..c4bbd74 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -53,9 +53,14 @@
#define ESDHC_CLOCK_HCKEN 0x00000002
#define ESDHC_CLOCK_IPGEN 0x00000001
+/* Tuning Block Control Register */
+#define ESDHC_TBCTL 0x120
+#define ESDHC_TB_EN 0x00000004
+
/* Control Register for DMA transfer */
#define ESDHC_DMA_SYSCTL 0x40c
#define ESDHC_PERIPHERAL_CLK_SEL 0x00080000
+#define ESDHC_FLUSH_ASYNC_FIFO 0x00040000
#define ESDHC_DMA_SNOOP 0x00000040
#endif /* _DRIVERS_MMC_SDHCI_ESDHC_H */
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index c2619f1..b26a780 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -622,6 +622,21 @@ static int esdhc_signal_voltage_switch(struct sdhci_host *host,
}
}
+void esdhc_set_tuning_block(struct sdhci_host *host)
+{
+ u32 val;
+
+ esdhc_clock_enable(host, false);
+ val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ val |= ESDHC_FLUSH_ASYNC_FIFO;
+ sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
+
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val |= ESDHC_TB_EN;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+ esdhc_clock_enable(host, true);
+}
+
#ifdef CONFIG_PM_SLEEP
static u32 esdhc_proctl;
static int esdhc_of_suspend(struct device *dev)
@@ -667,6 +682,7 @@ static const struct sdhci_ops sdhci_esdhc_be_ops = {
.reset = esdhc_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.start_signal_voltage_switch = esdhc_signal_voltage_switch,
+ .set_tuning_block = esdhc_set_tuning_block,
};
static const struct sdhci_ops sdhci_esdhc_le_ops = {
@@ -685,6 +701,7 @@ static const struct sdhci_ops sdhci_esdhc_le_ops = {
.reset = esdhc_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.start_signal_voltage_switch = esdhc_signal_voltage_switch,
+ .set_tuning_block = esdhc_set_tuning_block,
};
static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
--
2.1.0.27.g96db324
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