diff mbox series

[V5,18/26] mmc: sdhci-uhs2: add uhs2_control() to initialise the interface

Message ID 20221019110647.11076-19-victor.shih@genesyslogic.com.tw
State New
Headers
Series Add support UHS-II for GL9755 |

Commit Message

Victor Shih Oct. 19, 2022, 11:06 a.m. UTC 
  This is a sdhci version of mmc's uhs2_set_reg operation.
UHS-II interface (related registers) will be initialised here.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
---
 drivers/mmc/host/sdhci-uhs2.c | 103 ++++++++++++++++++++++++++++++++++
 drivers/mmc/host/sdhci.c      |  12 ++++
 drivers/mmc/host/sdhci.h      |   1 +
 3 files changed, 116 insertions(+)

Comments

Adrian Hunter Nov. 1, 2022, 5:15 p.m. UTC | #1 
On 19/10/22 14:06, Victor Shih wrote:
> This is a sdhci version of mmc's uhs2_set_reg operation.
> UHS-II interface (related registers) will be initialised here.
> 
> Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
> ---
>  drivers/mmc/host/sdhci-uhs2.c | 103 ++++++++++++++++++++++++++++++++++
>  drivers/mmc/host/sdhci.c      |  12 ++++
>  drivers/mmc/host/sdhci.h      |   1 +
>  3 files changed, 116 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> index afaca5d96938..c9d59b8ac37f 100644
> --- a/drivers/mmc/host/sdhci-uhs2.c
> +++ b/drivers/mmc/host/sdhci-uhs2.c
> @@ -350,6 +350,53 @@ static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>  	spin_unlock_irqrestore(&host->lock, flags);
>  }
>  
> +static void sdhci_uhs2_set_config(struct sdhci_host *host)
> +{
> +	u32 value;
> +	u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SET_PTR);
> +	u16 sdhci_uhs2_gen_set_reg = (sdhci_uhs2_set_ptr + 0);
> +	u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4);
> +	u16 sdhci_uhs2_tran_set_reg = (sdhci_uhs2_set_ptr + 8);
> +	u16 sdhci_uhs2_tran_set_1_reg = (sdhci_uhs2_set_ptr + 12);
> +
> +	/* Set Gen Settings */
> +	sdhci_writel(host, host->mmc->uhs2_caps.n_lanes_set <<
> +		SDHCI_UHS2_GEN_SET_N_LANES_POS, sdhci_uhs2_gen_set_reg);
> +
> +	/* Set PHY Settings */
> +	value = (host->mmc->uhs2_caps.n_lss_dir_set <<
> +			SDHCI_UHS2_PHY_SET_N_LSS_DIR_POS) |
> +		(host->mmc->uhs2_caps.n_lss_sync_set <<
> +			SDHCI_UHS2_PHY_SET_N_LSS_SYN_POS);
> +	if (host->mmc->flags & MMC_UHS2_SPEED_B)
> +		value |= 1 << SDHCI_UHS2_PHY_SET_SPEED_POS;
> +	sdhci_writel(host, value, sdhci_uhs2_phy_set_reg);
> +
> +	/* Set LINK-TRAN Settings */
> +	value = (host->mmc->uhs2_caps.max_retry_set <<
> +			SDHCI_UHS2_TRAN_SET_RETRY_CNT_POS) |
> +		(host->mmc->uhs2_caps.n_fcu_set <<
> +			SDHCI_UHS2_TRAN_SET_N_FCU_POS);
> +	sdhci_writel(host, value, sdhci_uhs2_tran_set_reg);
> +	sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set,
> +		     sdhci_uhs2_tran_set_1_reg);
> +}
> +
> +static int sdhci_uhs2_check_dormant(struct sdhci_host *host)
> +{
> +	u32 val;
> +	/* 100ms */
> +	int timeout = 100000;
> +
> +	if (read_poll_timeout_atomic(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE),
> +				     100, timeout, true, host, SDHCI_PRESENT_STATE)) {
> +		pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc));
> +		sdhci_dumpregs(host);
> +		return -EIO;
> +	}
> +	return 0;
> +}
> +
>  /*****************************************************************************\
>   *                                                                           *
>   * MMC callbacks                                                             *
> @@ -435,6 +482,61 @@ static int sdhci_uhs2_enable_clk(struct mmc_host *mmc)
>  	return 0;
>  }
>  
> +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc);
> +
> +static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
> +{
> +	struct sdhci_host *host = mmc_priv(mmc);
> +	unsigned long flags;
> +	int err = 0;
> +	u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SET_PTR);
> +	u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4);
> +
> +	DBG("Begin %s, act %d.\n", __func__, op);

DBG already has __func__.  Please also check other DBG that
have duplicate __func__

> +
> +	spin_lock_irqsave(&host->lock, flags);

This all relates to initialization or reinitialization, so I suspect
the spinlock is not needed here.  What could it be racing with?

> +
> +	switch (op) {
> +	case UHS2_PHY_INIT:
> +		err = sdhci_uhs2_do_detect_init(mmc);
> +		break;
> +	case UHS2_SET_CONFIG:
> +		sdhci_uhs2_set_config(host);
> +		break;
> +	case UHS2_ENABLE_INT:
> +		sdhci_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT);
> +		break;
> +	case UHS2_DISABLE_INT:
> +		sdhci_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0);
> +		break;
> +	case UHS2_SET_SPEED_B:
> +		sdhci_writeb(host, 1 << SDHCI_UHS2_PHY_SET_SPEED_POS,
> +			     sdhci_uhs2_phy_set_reg);
> +		break;
> +	case UHS2_CHECK_DORMANT:
> +		err = sdhci_uhs2_check_dormant(host);
> +		break;
> +	case UHS2_DISABLE_CLK:
> +		err = sdhci_uhs2_disable_clk(mmc);
> +		break;
> +	case UHS2_ENABLE_CLK:
> +		err = sdhci_uhs2_enable_clk(mmc);
> +		break;
> +	case UHS2_POST_ATTACH_SD:
> +		host->ops->uhs2_post_attach_sd(host);
> +		break;
> +	default:
> +		pr_err("%s: input sd uhs2 operation %d is wrong!\n",
> +		       mmc_hostname(host->mmc), op);
> +		err = -EIO;
> +		break;
> +	}
> +
> +	spin_unlock_irqrestore(&host->lock, flags);
> +
> +	return err;
> +}
> +
>  /*****************************************************************************\
>   *                                                                           *
>   * Driver init/exit                                                          *
> @@ -589,6 +691,7 @@ static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
>  	host->mmc_host_ops.start_signal_voltage_switch =
>  		sdhci_uhs2_start_signal_voltage_switch;
>  	host->mmc_host_ops.uhs2_set_ios = sdhci_uhs2_set_ios;
> +	host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
>  
>  	if (!host->mmc_host_ops.uhs2_detect_init)
>  		host->mmc_host_ops.uhs2_detect_init = sdhci_uhs2_do_detect_init;
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index de47c71995fb..b9db2e976010 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -236,6 +236,18 @@ void sdhci_reset(struct sdhci_host *host, u8 mask)
>  }
>  EXPORT_SYMBOL_GPL(sdhci_reset);
>  
> +void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
> +{
> +	u32 ier;
> +
> +	ier = sdhci_readl(host, SDHCI_INT_ENABLE);
> +	ier &= ~clear;
> +	ier |= set;
> +	sdhci_writel(host, ier, SDHCI_INT_ENABLE);
> +	sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
> +}
> +EXPORT_SYMBOL_GPL(sdhci_clear_set_irqs);

This might as well be in sdhci-uhs2.c since that is the only
place that calls it.  Then there is no need to export it.

> +
>  static bool sdhci_do_reset(struct sdhci_host *host, u8 mask)
>  {
>  	if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 22d7f47862ae..f049331bd0bc 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -869,6 +869,7 @@ void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
>  int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
>  void sdhci_set_bus_width(struct sdhci_host *host, int width);
>  void sdhci_reset(struct sdhci_host *host, u8 mask);
> +void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
>  void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);
>  int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
>  void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
Victor Shih Dec. 13, 2022, 8:47 a.m. UTC | #2 
Hi, Adrian

On Wed, Nov 2, 2022 at 1:15 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> On 19/10/22 14:06, Victor Shih wrote:
> > This is a sdhci version of mmc's uhs2_set_reg operation.
> > UHS-II interface (related registers) will be initialised here.
> >
> > Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> > Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
> > ---
> >  drivers/mmc/host/sdhci-uhs2.c | 103 ++++++++++++++++++++++++++++++++++
> >  drivers/mmc/host/sdhci.c      |  12 ++++
> >  drivers/mmc/host/sdhci.h      |   1 +
> >  3 files changed, 116 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> > index afaca5d96938..c9d59b8ac37f 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.c
> > +++ b/drivers/mmc/host/sdhci-uhs2.c
> > @@ -350,6 +350,53 @@ static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> >       spin_unlock_irqrestore(&host->lock, flags);
> >  }
> >
> > +static void sdhci_uhs2_set_config(struct sdhci_host *host)
> > +{
> > +     u32 value;
> > +     u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SET_PTR);
> > +     u16 sdhci_uhs2_gen_set_reg = (sdhci_uhs2_set_ptr + 0);
> > +     u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4);
> > +     u16 sdhci_uhs2_tran_set_reg = (sdhci_uhs2_set_ptr + 8);
> > +     u16 sdhci_uhs2_tran_set_1_reg = (sdhci_uhs2_set_ptr + 12);
> > +
> > +     /* Set Gen Settings */
> > +     sdhci_writel(host, host->mmc->uhs2_caps.n_lanes_set <<
> > +             SDHCI_UHS2_GEN_SET_N_LANES_POS, sdhci_uhs2_gen_set_reg);
> > +
> > +     /* Set PHY Settings */
> > +     value = (host->mmc->uhs2_caps.n_lss_dir_set <<
> > +                     SDHCI_UHS2_PHY_SET_N_LSS_DIR_POS) |
> > +             (host->mmc->uhs2_caps.n_lss_sync_set <<
> > +                     SDHCI_UHS2_PHY_SET_N_LSS_SYN_POS);
> > +     if (host->mmc->flags & MMC_UHS2_SPEED_B)
> > +             value |= 1 << SDHCI_UHS2_PHY_SET_SPEED_POS;
> > +     sdhci_writel(host, value, sdhci_uhs2_phy_set_reg);
> > +
> > +     /* Set LINK-TRAN Settings */
> > +     value = (host->mmc->uhs2_caps.max_retry_set <<
> > +                     SDHCI_UHS2_TRAN_SET_RETRY_CNT_POS) |
> > +             (host->mmc->uhs2_caps.n_fcu_set <<
> > +                     SDHCI_UHS2_TRAN_SET_N_FCU_POS);
> > +     sdhci_writel(host, value, sdhci_uhs2_tran_set_reg);
> > +     sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set,
> > +                  sdhci_uhs2_tran_set_1_reg);
> > +}
> > +
> > +static int sdhci_uhs2_check_dormant(struct sdhci_host *host)
> > +{
> > +     u32 val;
> > +     /* 100ms */
> > +     int timeout = 100000;
> > +
> > +     if (read_poll_timeout_atomic(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE),
> > +                                  100, timeout, true, host, SDHCI_PRESENT_STATE)) {
> > +             pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc));
> > +             sdhci_dumpregs(host);
> > +             return -EIO;
> > +     }
> > +     return 0;
> > +}
> > +
> >  /*****************************************************************************\
> >   *                                                                           *
> >   * MMC callbacks                                                             *
> > @@ -435,6 +482,61 @@ static int sdhci_uhs2_enable_clk(struct mmc_host *mmc)
> >       return 0;
> >  }
> >
> > +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc);
> > +
> > +static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
> > +{
> > +     struct sdhci_host *host = mmc_priv(mmc);
> > +     unsigned long flags;
> > +     int err = 0;
> > +     u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SET_PTR);
> > +     u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4);
> > +
> > +     DBG("Begin %s, act %d.\n", __func__, op);
>
> DBG already has __func__.  Please also check other DBG that
> have duplicate __func__
>

I will update it in the patch#17 of the new [PATCH V6].

> > +
> > +     spin_lock_irqsave(&host->lock, flags);
>
> This all relates to initialization or reinitialization, so I suspect
> the spinlock is not needed here.  What could it be racing with?
>

I will delete it and update it in the patch#17 of the new [PATCH V6].

> > +
> > +     switch (op) {
> > +     case UHS2_PHY_INIT:
> > +             err = sdhci_uhs2_do_detect_init(mmc);
> > +             break;
> > +     case UHS2_SET_CONFIG:
> > +             sdhci_uhs2_set_config(host);
> > +             break;
> > +     case UHS2_ENABLE_INT:
> > +             sdhci_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT);
> > +             break;
> > +     case UHS2_DISABLE_INT:
> > +             sdhci_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0);
> > +             break;
> > +     case UHS2_SET_SPEED_B:
> > +             sdhci_writeb(host, 1 << SDHCI_UHS2_PHY_SET_SPEED_POS,
> > +                          sdhci_uhs2_phy_set_reg);
> > +             break;
> > +     case UHS2_CHECK_DORMANT:
> > +             err = sdhci_uhs2_check_dormant(host);
> > +             break;
> > +     case UHS2_DISABLE_CLK:
> > +             err = sdhci_uhs2_disable_clk(mmc);
> > +             break;
> > +     case UHS2_ENABLE_CLK:
> > +             err = sdhci_uhs2_enable_clk(mmc);
> > +             break;
> > +     case UHS2_POST_ATTACH_SD:
> > +             host->ops->uhs2_post_attach_sd(host);
> > +             break;
> > +     default:
> > +             pr_err("%s: input sd uhs2 operation %d is wrong!\n",
> > +                    mmc_hostname(host->mmc), op);
> > +             err = -EIO;
> > +             break;
> > +     }
> > +
> > +     spin_unlock_irqrestore(&host->lock, flags);
> > +
> > +     return err;
> > +}
> > +
> >  /*****************************************************************************\
> >   *                                                                           *
> >   * Driver init/exit                                                          *
> > @@ -589,6 +691,7 @@ static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
> >       host->mmc_host_ops.start_signal_voltage_switch =
> >               sdhci_uhs2_start_signal_voltage_switch;
> >       host->mmc_host_ops.uhs2_set_ios = sdhci_uhs2_set_ios;
> > +     host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
> >
> >       if (!host->mmc_host_ops.uhs2_detect_init)
> >               host->mmc_host_ops.uhs2_detect_init = sdhci_uhs2_do_detect_init;
> > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> > index de47c71995fb..b9db2e976010 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -236,6 +236,18 @@ void sdhci_reset(struct sdhci_host *host, u8 mask)
> >  }
> >  EXPORT_SYMBOL_GPL(sdhci_reset);
> >
> > +void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
> > +{
> > +     u32 ier;
> > +
> > +     ier = sdhci_readl(host, SDHCI_INT_ENABLE);
> > +     ier &= ~clear;
> > +     ier |= set;
> > +     sdhci_writel(host, ier, SDHCI_INT_ENABLE);
> > +     sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
> > +}
> > +EXPORT_SYMBOL_GPL(sdhci_clear_set_irqs);
>
> This might as well be in sdhci-uhs2.c since that is the only
> place that calls it.  Then there is no need to export it.
>

I will update it in the patch#17 of the new [PATCH V6].

> > +
> >  static bool sdhci_do_reset(struct sdhci_host *host, u8 mask)
> >  {
> >       if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
> > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> > index 22d7f47862ae..f049331bd0bc 100644
> > --- a/drivers/mmc/host/sdhci.h
> > +++ b/drivers/mmc/host/sdhci.h
> > @@ -869,6 +869,7 @@ void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
> >  int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
> >  void sdhci_set_bus_width(struct sdhci_host *host, int width);
> >  void sdhci_reset(struct sdhci_host *host, u8 mask);
> > +void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
> >  void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);
> >  int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
> >  void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
>

Thanks, Victor Shih
diff mbox series

Patch

diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index afaca5d96938..c9d59b8ac37f 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -350,6 +350,53 @@  static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
+static void sdhci_uhs2_set_config(struct sdhci_host *host)
+{
+	u32 value;
+	u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SET_PTR);
+	u16 sdhci_uhs2_gen_set_reg = (sdhci_uhs2_set_ptr + 0);
+	u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4);
+	u16 sdhci_uhs2_tran_set_reg = (sdhci_uhs2_set_ptr + 8);
+	u16 sdhci_uhs2_tran_set_1_reg = (sdhci_uhs2_set_ptr + 12);
+
+	/* Set Gen Settings */
+	sdhci_writel(host, host->mmc->uhs2_caps.n_lanes_set <<
+		SDHCI_UHS2_GEN_SET_N_LANES_POS, sdhci_uhs2_gen_set_reg);
+
+	/* Set PHY Settings */
+	value = (host->mmc->uhs2_caps.n_lss_dir_set <<
+			SDHCI_UHS2_PHY_SET_N_LSS_DIR_POS) |
+		(host->mmc->uhs2_caps.n_lss_sync_set <<
+			SDHCI_UHS2_PHY_SET_N_LSS_SYN_POS);
+	if (host->mmc->flags & MMC_UHS2_SPEED_B)
+		value |= 1 << SDHCI_UHS2_PHY_SET_SPEED_POS;
+	sdhci_writel(host, value, sdhci_uhs2_phy_set_reg);
+
+	/* Set LINK-TRAN Settings */
+	value = (host->mmc->uhs2_caps.max_retry_set <<
+			SDHCI_UHS2_TRAN_SET_RETRY_CNT_POS) |
+		(host->mmc->uhs2_caps.n_fcu_set <<
+			SDHCI_UHS2_TRAN_SET_N_FCU_POS);
+	sdhci_writel(host, value, sdhci_uhs2_tran_set_reg);
+	sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set,
+		     sdhci_uhs2_tran_set_1_reg);
+}
+
+static int sdhci_uhs2_check_dormant(struct sdhci_host *host)
+{
+	u32 val;
+	/* 100ms */
+	int timeout = 100000;
+
+	if (read_poll_timeout_atomic(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE),
+				     100, timeout, true, host, SDHCI_PRESENT_STATE)) {
+		pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc));
+		sdhci_dumpregs(host);
+		return -EIO;
+	}
+	return 0;
+}
+
 /*****************************************************************************\
  *                                                                           *
  * MMC callbacks                                                             *
@@ -435,6 +482,61 @@  static int sdhci_uhs2_enable_clk(struct mmc_host *mmc)
 	return 0;
 }
 
+static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc);
+
+static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	unsigned long flags;
+	int err = 0;
+	u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SET_PTR);
+	u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4);
+
+	DBG("Begin %s, act %d.\n", __func__, op);
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	switch (op) {
+	case UHS2_PHY_INIT:
+		err = sdhci_uhs2_do_detect_init(mmc);
+		break;
+	case UHS2_SET_CONFIG:
+		sdhci_uhs2_set_config(host);
+		break;
+	case UHS2_ENABLE_INT:
+		sdhci_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT);
+		break;
+	case UHS2_DISABLE_INT:
+		sdhci_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0);
+		break;
+	case UHS2_SET_SPEED_B:
+		sdhci_writeb(host, 1 << SDHCI_UHS2_PHY_SET_SPEED_POS,
+			     sdhci_uhs2_phy_set_reg);
+		break;
+	case UHS2_CHECK_DORMANT:
+		err = sdhci_uhs2_check_dormant(host);
+		break;
+	case UHS2_DISABLE_CLK:
+		err = sdhci_uhs2_disable_clk(mmc);
+		break;
+	case UHS2_ENABLE_CLK:
+		err = sdhci_uhs2_enable_clk(mmc);
+		break;
+	case UHS2_POST_ATTACH_SD:
+		host->ops->uhs2_post_attach_sd(host);
+		break;
+	default:
+		pr_err("%s: input sd uhs2 operation %d is wrong!\n",
+		       mmc_hostname(host->mmc), op);
+		err = -EIO;
+		break;
+	}
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	return err;
+}
+
 /*****************************************************************************\
  *                                                                           *
  * Driver init/exit                                                          *
@@ -589,6 +691,7 @@  static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
 	host->mmc_host_ops.start_signal_voltage_switch =
 		sdhci_uhs2_start_signal_voltage_switch;
 	host->mmc_host_ops.uhs2_set_ios = sdhci_uhs2_set_ios;
+	host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
 
 	if (!host->mmc_host_ops.uhs2_detect_init)
 		host->mmc_host_ops.uhs2_detect_init = sdhci_uhs2_do_detect_init;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index de47c71995fb..b9db2e976010 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -236,6 +236,18 @@  void sdhci_reset(struct sdhci_host *host, u8 mask)
 }
 EXPORT_SYMBOL_GPL(sdhci_reset);
 
+void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
+{
+	u32 ier;
+
+	ier = sdhci_readl(host, SDHCI_INT_ENABLE);
+	ier &= ~clear;
+	ier |= set;
+	sdhci_writel(host, ier, SDHCI_INT_ENABLE);
+	sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
+}
+EXPORT_SYMBOL_GPL(sdhci_clear_set_irqs);
+
 static bool sdhci_do_reset(struct sdhci_host *host, u8 mask)
 {
 	if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 22d7f47862ae..f049331bd0bc 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -869,6 +869,7 @@  void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
 int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
 void sdhci_set_bus_width(struct sdhci_host *host, int width);
 void sdhci_reset(struct sdhci_host *host, u8 mask);
+void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
 void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);
 int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
 void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);