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Commit b214fe59 authored by Yinbo Zhu's avatar Yinbo Zhu Committed by Ulf Hansson
Browse files

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



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: default avatarYinbo Zhu <yinbo.zhu@nxp.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 5dd19552

drivers/mmc/host/sdhci-of-esdhc.c

+22 −0
Original line number Diff line number Diff line
@@ -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"
@@ -867,6 +868,25 @@ 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)
@@ -914,6 +934,7 @@ 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 = {
@@ -931,6 +952,7 @@ 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 = {