From 189382f7a338c02b448ab27e1d5566e052165dc8 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 7 Dec 2016 16:30:11 -0300
Subject: Linux-libre 4.8.12-gnu
---
drivers/mmc/host/sdhci-of-esdhc.c | 14 ++++++++++++++
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 15 insertions(+)
(limited to 'drivers/mmc')
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 239be2fde..2267601f0 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -66,6 +66,20 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
return ret;
}
}
+ /*
+ * The DAT[3:0] line signal levels and the CMD line signal level are
+ * not compatible with standard SDHC register. The line signal levels
+ * DAT[7:0] are at bits 31:24 and the command line signal level is at
+ * bit 23. All other bits are the same as in the standard SDHC
+ * register.
+ */
+ if (spec_reg == SDHCI_PRESENT_STATE) {
+ ret = value & 0x000fffff;
+ ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
+ ret |= (value << 1) & SDHCI_CMD_LVL;
+ return ret;
+ }
+
ret = value;
return ret;
}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 0411c9f36..1b3bd1c7f 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -73,6 +73,7 @@
#define SDHCI_DATA_LVL_MASK 0x00F00000
#define SDHCI_DATA_LVL_SHIFT 20
#define SDHCI_DATA_0_LVL_MASK 0x00100000
+#define SDHCI_CMD_LVL 0x01000000
#define SDHCI_HOST_CONTROL 0x28
#define SDHCI_CTRL_LED 0x01
--
cgit v1.2.3-54-g00ecf