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mmc: sdhci-of-esdhc: add erratum eSDHC7 support

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Invalid Transfer Complete (IRQSTAT[TC]) bit could be set during
multi-write operation even when the BLK_CNT in BLKATTR register
has not reached zero. Therefore, Transfer Complete might be
reported twice due to this erratum since a valid Transfer Complete
occurs when BLK_CNT reaches zero. This erratum is to fix this issue

Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Yinbo Zhu 2019-03-11 02:16:47 +00:00 committed by Ulf Hansson
parent 5dd1955225
commit b214fe592a
1 changed files with 22 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
drivers/mmc/host/sdhci-of-esdhc.c
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@ -24,6 +24,7 @@
#include <linux/ktime.h> #include <linux/ktime.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/mmc/host.h> #include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include "sdhci-pltfm.h" #include "sdhci-pltfm.h"
#include "sdhci-esdhc.h" #include "sdhci-esdhc.h"
@ -867,6 +868,25 @@ static void esdhc_set_uhs_signaling(struct sdhci_host *host,
sdhci_set_uhs_signaling(host, timing); 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 #ifdef CONFIG_PM_SLEEP
static u32 esdhc_proctl; static u32 esdhc_proctl;
static int esdhc_of_suspend(struct device *dev) static int esdhc_of_suspend(struct device *dev)
@ -914,6 +934,7 @@ static const struct sdhci_ops sdhci_esdhc_be_ops = {
.set_bus_width = esdhc_pltfm_set_bus_width, .set_bus_width = esdhc_pltfm_set_bus_width,
.reset = esdhc_reset, .reset = esdhc_reset,
.set_uhs_signaling = esdhc_set_uhs_signaling, .set_uhs_signaling = esdhc_set_uhs_signaling,
.irq = esdhc_irq,
}; };
static const struct sdhci_ops sdhci_esdhc_le_ops = { static const struct sdhci_ops sdhci_esdhc_le_ops = {
@ -931,6 +952,7 @@ static const struct sdhci_ops sdhci_esdhc_le_ops = {
.set_bus_width = esdhc_pltfm_set_bus_width, .set_bus_width = esdhc_pltfm_set_bus_width,
.reset = esdhc_reset, .reset = esdhc_reset,
.set_uhs_signaling = esdhc_set_uhs_signaling, .set_uhs_signaling = esdhc_set_uhs_signaling,
.irq = esdhc_irq,
}; };
static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = { static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {