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path: root/drivers/mmc/host/sdhci-of-esdhc.c
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Diffstat (limited to 'drivers/mmc/host/sdhci-of-esdhc.c')
-rw-r--r--drivers/mmc/host/sdhci-of-esdhc.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 4e669b4edfc1..e20c00f14109 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -24,6 +24,7 @@
#include <linux/ktime.h>
#include <linux/dma-mapping.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
@@ -81,6 +82,7 @@ struct sdhci_esdhc {
bool quirk_limited_clk_division;
bool quirk_unreliable_pulse_detection;
bool quirk_fixup_tuning;
+ bool quirk_ignore_data_inhibit;
unsigned int peripheral_clock;
const struct esdhc_clk_fixup *clk_fixup;
u32 div_ratio;
@@ -147,6 +149,19 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
return ret;
}
+ /*
+ * Some controllers have unreliable Data Line Active
+ * bit for commands with busy signal. This affects
+ * Command Inhibit (data) bit. Just ignore it since
+ * MMC core driver has already polled card status
+ * with CMD13 after any command with busy siganl.
+ */
+ if ((spec_reg == SDHCI_PRESENT_STATE) &&
+ (esdhc->quirk_ignore_data_inhibit == true)) {
+ ret = value & ~SDHCI_DATA_INHIBIT;
+ return ret;
+ }
+
ret = value;
return ret;
}
@@ -694,6 +709,9 @@ static void esdhc_reset(struct sdhci_host *host, u8 mask)
sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ if (of_find_compatible_node(NULL, NULL, "fsl,p2020-esdhc"))
+ mdelay(5);
+
if (mask & SDHCI_RESET_ALL) {
val = sdhci_readl(host, ESDHC_TBCTL);
val &= ~ESDHC_TB_EN;
@@ -864,6 +882,25 @@ static void esdhc_set_uhs_signaling(struct sdhci_host *host,
sdhci_set_uhs_signaling(host, timing);
}
+static u32 esdhc_irq(struct sdhci_host *host, u32 intmask)
+{
+ u32 command;
+
+ if (of_find_compatible_node(NULL, NULL,
+ "fsl,p2020-esdhc")) {
+ command = SDHCI_GET_CMD(sdhci_readw(host,
+ SDHCI_COMMAND));
+ if (command == MMC_WRITE_MULTIPLE_BLOCK &&
+ sdhci_readw(host, SDHCI_BLOCK_COUNT) &&
+ intmask & SDHCI_INT_DATA_END) {
+ intmask &= ~SDHCI_INT_DATA_END;
+ sdhci_writel(host, SDHCI_INT_DATA_END,
+ SDHCI_INT_STATUS);
+ }
+ }
+ return intmask;
+}
+
#ifdef CONFIG_PM_SLEEP
static u32 esdhc_proctl;
static int esdhc_of_suspend(struct device *dev)
@@ -911,6 +948,7 @@ static const struct sdhci_ops sdhci_esdhc_be_ops = {
.set_bus_width = esdhc_pltfm_set_bus_width,
.reset = esdhc_reset,
.set_uhs_signaling = esdhc_set_uhs_signaling,
+ .irq = esdhc_irq,
};
static const struct sdhci_ops sdhci_esdhc_le_ops = {
@@ -928,6 +966,7 @@ static const struct sdhci_ops sdhci_esdhc_le_ops = {
.set_bus_width = esdhc_pltfm_set_bus_width,
.reset = esdhc_reset,
.set_uhs_signaling = esdhc_set_uhs_signaling,
+ .irq = esdhc_irq,
};
static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
@@ -955,6 +994,7 @@ static struct soc_device_attribute soc_incorrect_hostver[] = {
static struct soc_device_attribute soc_fixup_sdhc_clkdivs[] = {
{ .family = "QorIQ LX2160A", .revision = "1.0", },
+ { .family = "QorIQ LX2160A", .revision = "2.0", },
{ },
};
@@ -1074,6 +1114,11 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
if (esdhc->vendor_ver > VENDOR_V_22)
host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;
+ if (of_find_compatible_node(NULL, NULL, "fsl,p2020-esdhc")) {
+ host->quirks2 |= SDHCI_QUIRK_RESET_AFTER_REQUEST;
+ host->quirks2 |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+ }
+
if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
of_device_is_compatible(np, "fsl,p5020-esdhc") ||
of_device_is_compatible(np, "fsl,p4080-esdhc") ||
@@ -1084,12 +1129,14 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
if (of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+ esdhc->quirk_ignore_data_inhibit = false;
if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
/*
* Freescale messed up with P2020 as it has a non-standard
* host control register
*/
host->quirks2 |= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
+ esdhc->quirk_ignore_data_inhibit = true;
}
/* call to generic mmc_of_parse to support additional capabilities */