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Commit ef96c5fa authored by Ritesh Harjani's avatar Ritesh Harjani Committed by Venkat Gopalakrishnan
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mmc: sdhci: Add hs400 enhanced strobe mode support to host 



This adds hs400 enhanced strobe mode(emmc 5.1 feature)
support to sdhci host.

Change-Id: Ib65905fa263553842cd55f38edccc135cac4bcf9
Signed-off-by: default avatarRitesh Harjani <riteshh@codeaurora.org>
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
parent ae923989

drivers/mmc/host/sdhci.c

+15 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ static void sdhci_finish_data(struct sdhci_host *); 


static void sdhci_finish_command(struct sdhci_host *);

static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);

static int sdhci_enhanced_strobe(struct mmc_host *mmc);

static void sdhci_tuning_timer(unsigned long data);

static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);

static void sdhci_show_adma_error(struct sdhci_host *host);
@@ -2274,6 +2275,19 @@ static int sdhci_card_busy(struct mmc_host *mmc) 
	return !(present_state & SDHCI_DATA_LVL_MASK);

}



static int sdhci_enhanced_strobe(struct mmc_host *mmc)

{

	struct sdhci_host *host = mmc_priv(mmc);

	int err = 0;



	sdhci_runtime_pm_get(host);

	if (host->ops->enhanced_strobe)

		err = host->ops->enhanced_strobe(host);

	sdhci_runtime_pm_put(host);



	return err;

}



static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)

{

	struct sdhci_host *host = mmc_priv(mmc);
@@ -2539,6 +2553,7 @@ static const struct mmc_host_ops sdhci_ops = { 
	.enable_sdio_irq = sdhci_enable_sdio_irq,

	.start_signal_voltage_switch	= sdhci_start_signal_voltage_switch,

	.execute_tuning			= sdhci_execute_tuning,

	.enhanced_strobe		= sdhci_enhanced_strobe,

	.card_event			= sdhci_card_event,

	.card_busy	= sdhci_card_busy,

	.enable		= sdhci_enable,

drivers/mmc/host/sdhci.h

+1 −0
Original line number Diff line number Diff line
@@ -320,6 +320,7 @@ struct sdhci_ops { 
#define REQ_IO_LOW	(1 << 2)

#define REQ_IO_HIGH	(1 << 3)

	void    (*card_event)(struct sdhci_host *host);

	int	(*enhanced_strobe)(struct sdhci_host *host);

	void	(*platform_bus_voting)(struct sdhci_host *host, u32 enable);

	void	(*dump_vendor_regs)(struct sdhci_host *host);

	int	(*config_auto_tuning_cmd)(struct sdhci_host *host,