diff mbox series

[RFC,v3.1,22/27] mmc: sdhci-uhs2: add add_host() and others to set up the driver

Message ID 20201106022726.19831-23-takahiro.akashi@linaro.org (mailing list archive)
State New, archived
Headers show
Series Add support UHS-II for GL9755 | expand

Commit Message

AKASHI Takahiro Nov. 6, 2020, 2:27 a.m. UTC 
This is a UHS-II version of sdhci's add_host/remove_host operation.
Any sdhci drivers which are capable of handling UHS-II cards must
call those functions instead of the corresponding sdhci's.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
 drivers/mmc/host/sdhci-uhs2.c | 198 ++++++++++++++++++++++++++++++++++
 drivers/mmc/host/sdhci-uhs2.h |   2 +
 drivers/mmc/host/sdhci.c      |  24 +++--
 drivers/mmc/host/sdhci.h      |  10 ++
 4 files changed, 226 insertions(+), 8 deletions(-)

Comments

Adrian Hunter Dec. 3, 2020, 9:42 a.m. UTC | #1 
On 6/11/20 4:27 am, AKASHI Takahiro wrote:
> This is a UHS-II version of sdhci's add_host/remove_host operation.
> Any sdhci drivers which are capable of handling UHS-II cards must
> call those functions instead of the corresponding sdhci's.
> 
> Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> ---
>  drivers/mmc/host/sdhci-uhs2.c | 198 ++++++++++++++++++++++++++++++++++
>  drivers/mmc/host/sdhci-uhs2.h |   2 +
>  drivers/mmc/host/sdhci.c      |  24 +++--
>  drivers/mmc/host/sdhci.h      |  10 ++
>  4 files changed, 226 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> index d50134e912f3..5d3362ea138f 100644
> --- a/drivers/mmc/host/sdhci-uhs2.c
> +++ b/drivers/mmc/host/sdhci-uhs2.c
> @@ -15,6 +15,7 @@
>  #include <linux/ktime.h>
>  #include <linux/module.h>
>  #include <linux/mmc/mmc.h>
> +#include <linux/regulator/consumer.h>
>  
>  #include "sdhci.h"
>  #include "sdhci-uhs2.h"
> @@ -406,6 +407,15 @@ static inline void sdhci_led_deactivate(struct sdhci_host *host)
>  {
>  }
>  #else
> +static inline int sdhci_led_register(struct sdhci_host *host)
> +{
> +	return 0;
> +}
> +
> +static inline void sdhci_led_unregister(struct sdhci_host *host)
> +{
> +}
> +
>  static inline void sdhci_led_activate(struct sdhci_host *host)
>  {
>  	__sdhci_led_activate(host);
> @@ -1298,6 +1308,194 @@ static irqreturn_t sdhci_uhs2_thread_irq(int irq, void *dev_id)
>  	return IRQ_HANDLED;
>  }
>  
> +/*****************************************************************************\
> + *
> + * Device allocation/registration                                            *
> + *                                                                           *
> +\*****************************************************************************/
> +
> +static int __sdhci_uhs2_add_host_v4(struct sdhci_host *host, u32 caps1)
> +{
> +	struct mmc_host *mmc;
> +	u32 max_current_caps2;
> +
> +	if (host->version < SDHCI_SPEC_400)
> +		return 0;
> +
> +	mmc = host->mmc;
> +
> +	/* Support UHS2 */
> +	if (caps1 & SDHCI_SUPPORT_UHS2)
> +		mmc->caps |= MMC_CAP_UHS2;
> +
> +	max_current_caps2 = sdhci_readl(host, SDHCI_MAX_CURRENT_1);
> +
> +	if ((caps1 & SDHCI_SUPPORT_VDD2_180) &&
> +	    !max_current_caps2 &&
> +	    !IS_ERR(mmc->supply.vmmc2)) {
> +		/* UHS2 - VDD2 */
> +		int curr = regulator_get_current_limit(mmc->supply.vmmc2);
> +
> +		if (curr > 0) {
> +			/* convert to SDHCI_MAX_CURRENT format */
> +			curr = curr / 1000;  /* convert to mA */
> +			curr = curr / SDHCI_MAX_CURRENT_MULTIPLIER;
> +			curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
> +			max_current_caps2 = curr;
> +		}
> +	}
> +
> +	if (caps1 & SDHCI_SUPPORT_VDD2_180) {
> +		mmc->ocr_avail_uhs2 |= MMC_VDD2_165_195;
> +		/*
> +		 * UHS2 doesn't require this. Only UHS-I bus needs to set
> +		 * max current.
> +		 */
> +		mmc->max_current_180_vdd2 = (max_current_caps2 &
> +					SDHCI_MAX_CURRENT_VDD2_180_MASK) *
> +					SDHCI_MAX_CURRENT_MULTIPLIER;
> +	} else {
> +		mmc->caps &= ~MMC_CAP_UHS2;
> +	}
> +
> +	return 0;
> +}
> +
> +static int sdhci_uhs2_host_ops_init(struct sdhci_host *host);
> +
> +static int __sdhci_uhs2_add_host(struct sdhci_host *host)

Can you leverage __sdhci_add_host() here?

> +{
> +	unsigned int flags = WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_HIGHPRI;
> +	struct mmc_host *mmc = host->mmc;
> +	int ret;
> +
> +	if ((mmc->caps2 & MMC_CAP2_CQE) &&
> +	    (host->quirks & SDHCI_QUIRK_BROKEN_CQE)) {
> +		mmc->caps2 &= ~MMC_CAP2_CQE;
> +		mmc->cqe_ops = NULL;
> +	}
> +
> +	/* overwrite ops */
> +	if (mmc->caps & MMC_CAP_UHS2)
> +		sdhci_uhs2_host_ops_init(host);
> +
> +	host->complete_wq = alloc_workqueue("sdhci", flags, 0);
> +	if (!host->complete_wq)
> +		return -ENOMEM;
> +
> +	INIT_WORK(&host->complete_work, sdhci_uhs2_complete_work);
> +
> +	timer_setup(&host->timer, sdhci_timeout_timer, 0);
> +	timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0);
> +
> +	init_waitqueue_head(&host->buf_ready_int);
> +
> +	sdhci_init(host, 0);
> +
> +	ret = request_threaded_irq(host->irq, sdhci_irq,
> +				   sdhci_uhs2_thread_irq,
> +				   IRQF_SHARED,	mmc_hostname(mmc), host);
> +	if (ret) {
> +		pr_err("%s: Failed to request IRQ %d: %d\n",
> +		       mmc_hostname(mmc), host->irq, ret);
> +		goto unwq;
> +	}
> +
> +	ret = sdhci_led_register(host);
> +	if (ret) {
> +		pr_err("%s: Failed to register LED device: %d\n",
> +		       mmc_hostname(mmc), ret);
> +		goto unirq;
> +	}
> +
> +	ret = mmc_add_host(mmc);
> +	if (ret)
> +		goto unled;
> +
> +	pr_info("%s: SDHCI controller on %s [%s] using %s\n",
> +		mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
> +		host->use_external_dma ? "External DMA" :
> +		(host->flags & SDHCI_USE_ADMA) ?
> +		(host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" :
> +		(host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
> +
> +	sdhci_enable_card_detection(host);
> +
> +	return 0;
> +
> +unled:
> +	sdhci_led_unregister(host);
> +unirq:
> +	sdhci_do_reset(host, SDHCI_RESET_ALL);
> +	sdhci_writel(host, 0, SDHCI_INT_ENABLE);
> +	sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
> +	free_irq(host->irq, host);
> +unwq:
> +	destroy_workqueue(host->complete_wq);
> +
> +	return ret;
> +}
> +
> +static void __sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
> +{
> +	if (!(host->mmc) || !(host->mmc->flags & MMC_UHS2_SUPPORT))
> +		return;
> +
> +	if (!dead)
> +		sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL);
> +
> +	sdhci_writel(host, 0, SDHCI_UHS2_ERR_INT_STATUS_EN);
> +	sdhci_writel(host, 0, SDHCI_UHS2_ERR_INT_SIG_EN);
> +	host->mmc->flags &= ~MMC_UHS2_INITIALIZED;
> +}
> +
> +int sdhci_uhs2_add_host(struct sdhci_host *host)
> +{
> +	struct mmc_host *mmc = host->mmc;
> +	int ret;
> +
> +	ret = sdhci_setup_host(host);
> +	if (ret)
> +		return ret;
> +
> +	if (host->version >= SDHCI_SPEC_400) {
> +               ret = __sdhci_uhs2_add_host_v4(host, host->caps1);
> +               if (ret)
> +                       goto cleanup;
> +	}
> +
> +	if ((mmc->caps & MMC_CAP_UHS2) && !host->v4_mode)
> +		/* host doesn't want to enable UHS2 support */
> +		/* FIXME: Do we have to do some cleanup here? */
> +		mmc->caps &= ~MMC_CAP_UHS2;
> +
> +	ret = __sdhci_uhs2_add_host(host);
> +	if (ret)
> +		goto cleanup2;
> +
> +	return 0;
> +
> +cleanup2:
> +	/*
> +	 * TODO: Is this a right cleanup?
> +	 */
> +	if (host->version >= SDHCI_SPEC_400)
> +		__sdhci_uhs2_remove_host(host, 0);
> +cleanup:
> +	sdhci_cleanup_host(host);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(sdhci_uhs2_add_host);
> +
> +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
> +{
> +	__sdhci_uhs2_remove_host(host, dead);
> +
> +	sdhci_uhs2_remove_host(host, dead);

Meant to be sdhci_remove_host() presumably?

> +}
> +EXPORT_SYMBOL_GPL(sdhci_uhs2_remove_host);
> +
>  /*****************************************************************************\
>   *                                                                           *
>   * Driver init/exit                                                          *
> diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
> index b74af641d00e..34e140f21284 100644
> --- a/drivers/mmc/host/sdhci-uhs2.h
> +++ b/drivers/mmc/host/sdhci-uhs2.h
> @@ -218,5 +218,7 @@ void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
>  void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq);
>  int sdhci_uhs2_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
>  u32 sdhci_uhs2_irq(struct sdhci_host *host, u32 intmask);
> +int sdhci_uhs2_add_host(struct sdhci_host *host);
> +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead);
>  
>  #endif /* __SDHCI_UHS2_H */
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index e2dfc7767bcf..d37c3edb1ed0 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -176,10 +176,11 @@ static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
>  	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
>  }
>  
> -static void sdhci_enable_card_detection(struct sdhci_host *host)
> +void sdhci_enable_card_detection(struct sdhci_host *host)
>  {
>  	sdhci_set_card_detection(host, true);
>  }
> +EXPORT_SYMBOL_GPL(sdhci_enable_card_detection);
>  
>  static void sdhci_disable_card_detection(struct sdhci_host *host)
>  {
> @@ -237,7 +238,7 @@ void sdhci_reset(struct sdhci_host *host, u8 mask)
>  }
>  EXPORT_SYMBOL_GPL(sdhci_reset);
>  
> -static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
> +void sdhci_do_reset(struct sdhci_host *host, u8 mask)
>  {
>  	if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
>  		struct mmc_host *mmc = host->mmc;
> @@ -258,6 +259,7 @@ static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
>  		host->preset_enabled = false;
>  	}
>  }
> +EXPORT_SYMBOL_GPL(sdhci_do_reset);
>  
>  static void sdhci_set_default_irqs(struct sdhci_host *host)
>  {
> @@ -321,7 +323,7 @@ static void sdhci_config_dma(struct sdhci_host *host)
>  	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
>  }
>  
> -static void sdhci_init(struct sdhci_host *host, int soft)
> +void sdhci_init(struct sdhci_host *host, int soft)
>  {
>  	struct mmc_host *mmc = host->mmc;
>  	unsigned long flags;
> @@ -346,6 +348,7 @@ static void sdhci_init(struct sdhci_host *host, int soft)
>  		mmc->ops->set_ios(mmc, &mmc->ios);
>  	}
>  }
> +EXPORT_SYMBOL_GPL(sdhci_init);
>  
>  static void sdhci_reinit(struct sdhci_host *host)
>  {
> @@ -410,7 +413,7 @@ static void sdhci_led_control(struct led_classdev *led,
>  	spin_unlock_irqrestore(&host->lock, flags);
>  }
>  
> -static int sdhci_led_register(struct sdhci_host *host)
> +int sdhci_led_register(struct sdhci_host *host)
>  {
>  	struct mmc_host *mmc = host->mmc;
>  
> @@ -427,14 +430,16 @@ static int sdhci_led_register(struct sdhci_host *host)
>  
>  	return led_classdev_register(mmc_dev(mmc), &host->led);
>  }
> +EXPORT_SYMBOL_GPL(sdhci_led_register);
>  
> -static void sdhci_led_unregister(struct sdhci_host *host)
> +void sdhci_led_unregister(struct sdhci_host *host)
>  {
>  	if (host->quirks & SDHCI_QUIRK_NO_LED)
>  		return;
>  
>  	led_classdev_unregister(&host->led);
>  }
> +EXPORT_SYMBOL_GPL(sdhci_led_unregister);
>  
>  static inline void sdhci_led_activate(struct sdhci_host *host)
>  {
> @@ -3175,7 +3180,7 @@ static void sdhci_complete_work(struct work_struct *work)
>  		;
>  }
>  
> -static void sdhci_timeout_timer(struct timer_list *t)
> +void sdhci_timeout_timer(struct timer_list *t)
>  {
>  	struct sdhci_host *host;
>  	unsigned long flags;
> @@ -3195,8 +3200,9 @@ static void sdhci_timeout_timer(struct timer_list *t)
>  
>  	spin_unlock_irqrestore(&host->lock, flags);
>  }
> +EXPORT_SYMBOL_GPL(sdhci_timeout_timer);
>  
> -static void sdhci_timeout_data_timer(struct timer_list *t)
> +void sdhci_timeout_data_timer(struct timer_list *t)
>  {
>  	struct sdhci_host *host;
>  	unsigned long flags;
> @@ -3226,6 +3232,7 @@ static void sdhci_timeout_data_timer(struct timer_list *t)
>  
>  	spin_unlock_irqrestore(&host->lock, flags);
>  }
> +EXPORT_SYMBOL_GPL(sdhci_timeout_data_timer);
>  
>  /*****************************************************************************\
>   *                                                                           *
> @@ -3469,7 +3476,7 @@ static inline bool sdhci_defer_done(struct sdhci_host *host,
>  		data->host_cookie == COOKIE_MAPPED);
>  }
>  
> -static irqreturn_t sdhci_irq(int irq, void *dev_id)
> +irqreturn_t sdhci_irq(int irq, void *dev_id)
>  {
>  	struct mmc_request *mrqs_done[SDHCI_MAX_MRQS] = {0};
>  	irqreturn_t result = IRQ_NONE;
> @@ -3609,6 +3616,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
>  
>  	return result;
>  }
> +EXPORT_SYMBOL_GPL(sdhci_irq);
>  
>  static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
>  {
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 74572b54ec47..b1d856664b58 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -832,8 +832,15 @@ static inline void sdhci_read_caps(struct sdhci_host *host)
>  }
>  
>  bool sdhci_data_line_cmd(struct mmc_command *cmd);
> +void sdhci_enable_card_detection(struct sdhci_host *host);
>  void sdhci_runtime_pm_bus_on(struct sdhci_host *host);
>  void sdhci_runtime_pm_bus_off(struct sdhci_host *host);
> +void sdhci_do_reset(struct sdhci_host *host, u8 mask);
> +void sdhci_init(struct sdhci_host *host, int soft);
> +#if IS_REACHABLE(CONFIG_LEDS_CLASS)
> +int sdhci_led_register(struct sdhci_host *host);
> +void sdhci_led_unregister(struct sdhci_host *host);
> +#endif
>  void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq,
>                       unsigned long timeout);
>  void sdhci_initialize_data(struct sdhci_host *host, struct mmc_data *data);
> @@ -884,6 +891,9 @@ int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
>  void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable);
>  void sdhci_request_done_dma(struct sdhci_host *host, struct mmc_request *mrq);
>  bool sdhci_request_done(struct sdhci_host *host);
> +void sdhci_timeout_timer(struct timer_list *t);
> +void sdhci_timeout_data_timer(struct timer_list *t);
> +irqreturn_t sdhci_irq(int irq, void *dev_id);
>  void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
>  			   dma_addr_t addr, int len, unsigned int cmd);
>  
>
AKASHI Takahiro Dec. 8, 2020, 7:42 a.m. UTC | #2 
On Thu, Dec 03, 2020 at 11:42:34AM +0200, Adrian Hunter wrote:
> On 6/11/20 4:27 am, AKASHI Takahiro wrote:
> > This is a UHS-II version of sdhci's add_host/remove_host operation.
> > Any sdhci drivers which are capable of handling UHS-II cards must
> > call those functions instead of the corresponding sdhci's.
> > 
> > Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> > ---
> >  drivers/mmc/host/sdhci-uhs2.c | 198 ++++++++++++++++++++++++++++++++++
> >  drivers/mmc/host/sdhci-uhs2.h |   2 +
> >  drivers/mmc/host/sdhci.c      |  24 +++--
> >  drivers/mmc/host/sdhci.h      |  10 ++
> >  4 files changed, 226 insertions(+), 8 deletions(-)
> > 
> > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> > index d50134e912f3..5d3362ea138f 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.c
> > +++ b/drivers/mmc/host/sdhci-uhs2.c
> > @@ -15,6 +15,7 @@
> >  #include <linux/ktime.h>
> >  #include <linux/module.h>
> >  #include <linux/mmc/mmc.h>
> > +#include <linux/regulator/consumer.h>
> >  
> >  #include "sdhci.h"
> >  #include "sdhci-uhs2.h"
> > @@ -406,6 +407,15 @@ static inline void sdhci_led_deactivate(struct sdhci_host *host)
> >  {
> >  }
> >  #else
> > +static inline int sdhci_led_register(struct sdhci_host *host)
> > +{
> > +	return 0;
> > +}
> > +
> > +static inline void sdhci_led_unregister(struct sdhci_host *host)
> > +{
> > +}
> > +
> >  static inline void sdhci_led_activate(struct sdhci_host *host)
> >  {
> >  	__sdhci_led_activate(host);
> > @@ -1298,6 +1308,194 @@ static irqreturn_t sdhci_uhs2_thread_irq(int irq, void *dev_id)
> >  	return IRQ_HANDLED;
> >  }
> >  
> > +/*****************************************************************************\
> > + *
> > + * Device allocation/registration                                            *
> > + *                                                                           *
> > +\*****************************************************************************/
> > +
> > +static int __sdhci_uhs2_add_host_v4(struct sdhci_host *host, u32 caps1)
> > +{
> > +	struct mmc_host *mmc;
> > +	u32 max_current_caps2;
> > +
> > +	if (host->version < SDHCI_SPEC_400)
> > +		return 0;
> > +
> > +	mmc = host->mmc;
> > +
> > +	/* Support UHS2 */
> > +	if (caps1 & SDHCI_SUPPORT_UHS2)
> > +		mmc->caps |= MMC_CAP_UHS2;
> > +
> > +	max_current_caps2 = sdhci_readl(host, SDHCI_MAX_CURRENT_1);
> > +
> > +	if ((caps1 & SDHCI_SUPPORT_VDD2_180) &&
> > +	    !max_current_caps2 &&
> > +	    !IS_ERR(mmc->supply.vmmc2)) {
> > +		/* UHS2 - VDD2 */
> > +		int curr = regulator_get_current_limit(mmc->supply.vmmc2);
> > +
> > +		if (curr > 0) {
> > +			/* convert to SDHCI_MAX_CURRENT format */
> > +			curr = curr / 1000;  /* convert to mA */
> > +			curr = curr / SDHCI_MAX_CURRENT_MULTIPLIER;
> > +			curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
> > +			max_current_caps2 = curr;
> > +		}
> > +	}
> > +
> > +	if (caps1 & SDHCI_SUPPORT_VDD2_180) {
> > +		mmc->ocr_avail_uhs2 |= MMC_VDD2_165_195;
> > +		/*
> > +		 * UHS2 doesn't require this. Only UHS-I bus needs to set
> > +		 * max current.
> > +		 */
> > +		mmc->max_current_180_vdd2 = (max_current_caps2 &
> > +					SDHCI_MAX_CURRENT_VDD2_180_MASK) *
> > +					SDHCI_MAX_CURRENT_MULTIPLIER;
> > +	} else {
> > +		mmc->caps &= ~MMC_CAP_UHS2;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int sdhci_uhs2_host_ops_init(struct sdhci_host *host);
> > +
> > +static int __sdhci_uhs2_add_host(struct sdhci_host *host)
> 
> Can you leverage __sdhci_add_host() here?

Yes if we can always use sdhci_request_done() instead of
sdhci_uhs2_request_done() and we don't need sdhci_uhs2_thread_irq().

> > +{
> > +	unsigned int flags = WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_HIGHPRI;
> > +	struct mmc_host *mmc = host->mmc;
> > +	int ret;
> > +
> > +	if ((mmc->caps2 & MMC_CAP2_CQE) &&
> > +	    (host->quirks & SDHCI_QUIRK_BROKEN_CQE)) {
> > +		mmc->caps2 &= ~MMC_CAP2_CQE;
> > +		mmc->cqe_ops = NULL;
> > +	}
> > +
> > +	/* overwrite ops */
> > +	if (mmc->caps & MMC_CAP_UHS2)
> > +		sdhci_uhs2_host_ops_init(host);
> > +
> > +	host->complete_wq = alloc_workqueue("sdhci", flags, 0);
> > +	if (!host->complete_wq)
> > +		return -ENOMEM;
> > +
> > +	INIT_WORK(&host->complete_work, sdhci_uhs2_complete_work);
> > +
> > +	timer_setup(&host->timer, sdhci_timeout_timer, 0);
> > +	timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0);
> > +
> > +	init_waitqueue_head(&host->buf_ready_int);
> > +
> > +	sdhci_init(host, 0);
> > +
> > +	ret = request_threaded_irq(host->irq, sdhci_irq,
> > +				   sdhci_uhs2_thread_irq,
> > +				   IRQF_SHARED,	mmc_hostname(mmc), host);
> > +	if (ret) {
> > +		pr_err("%s: Failed to request IRQ %d: %d\n",
> > +		       mmc_hostname(mmc), host->irq, ret);
> > +		goto unwq;
> > +	}
> > +
> > +	ret = sdhci_led_register(host);
> > +	if (ret) {
> > +		pr_err("%s: Failed to register LED device: %d\n",
> > +		       mmc_hostname(mmc), ret);
> > +		goto unirq;
> > +	}
> > +
> > +	ret = mmc_add_host(mmc);
> > +	if (ret)
> > +		goto unled;
> > +
> > +	pr_info("%s: SDHCI controller on %s [%s] using %s\n",
> > +		mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
> > +		host->use_external_dma ? "External DMA" :
> > +		(host->flags & SDHCI_USE_ADMA) ?
> > +		(host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" :
> > +		(host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
> > +
> > +	sdhci_enable_card_detection(host);
> > +
> > +	return 0;
> > +
> > +unled:
> > +	sdhci_led_unregister(host);
> > +unirq:
> > +	sdhci_do_reset(host, SDHCI_RESET_ALL);
> > +	sdhci_writel(host, 0, SDHCI_INT_ENABLE);
> > +	sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
> > +	free_irq(host->irq, host);
> > +unwq:
> > +	destroy_workqueue(host->complete_wq);
> > +
> > +	return ret;
> > +}
> > +
> > +static void __sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
> > +{
> > +	if (!(host->mmc) || !(host->mmc->flags & MMC_UHS2_SUPPORT))
> > +		return;
> > +
> > +	if (!dead)
> > +		sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL);
> > +
> > +	sdhci_writel(host, 0, SDHCI_UHS2_ERR_INT_STATUS_EN);
> > +	sdhci_writel(host, 0, SDHCI_UHS2_ERR_INT_SIG_EN);
> > +	host->mmc->flags &= ~MMC_UHS2_INITIALIZED;
> > +}
> > +
> > +int sdhci_uhs2_add_host(struct sdhci_host *host)
> > +{
> > +	struct mmc_host *mmc = host->mmc;
> > +	int ret;
> > +
> > +	ret = sdhci_setup_host(host);
> > +	if (ret)
> > +		return ret;
> > +
> > +	if (host->version >= SDHCI_SPEC_400) {
> > +               ret = __sdhci_uhs2_add_host_v4(host, host->caps1);
> > +               if (ret)
> > +                       goto cleanup;
> > +	}
> > +
> > +	if ((mmc->caps & MMC_CAP_UHS2) && !host->v4_mode)
> > +		/* host doesn't want to enable UHS2 support */
> > +		/* FIXME: Do we have to do some cleanup here? */
> > +		mmc->caps &= ~MMC_CAP_UHS2;
> > +
> > +	ret = __sdhci_uhs2_add_host(host);
> > +	if (ret)
> > +		goto cleanup2;
> > +
> > +	return 0;
> > +
> > +cleanup2:
> > +	/*
> > +	 * TODO: Is this a right cleanup?
> > +	 */
> > +	if (host->version >= SDHCI_SPEC_400)
> > +		__sdhci_uhs2_remove_host(host, 0);
> > +cleanup:
> > +	sdhci_cleanup_host(host);
> > +
> > +	return ret;
> > +}
> > +EXPORT_SYMBOL_GPL(sdhci_uhs2_add_host);
> > +
> > +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
> > +{
> > +	__sdhci_uhs2_remove_host(host, dead);
> > +
> > +	sdhci_uhs2_remove_host(host, dead);
> 
> Meant to be sdhci_remove_host() presumably?

Correct. I wonder why I have noticed this bug in testing.

-Takahiro Akashi


> > +}
> > +EXPORT_SYMBOL_GPL(sdhci_uhs2_remove_host);
> > +
> >  /*****************************************************************************\
> >   *                                                                           *
> >   * Driver init/exit                                                          *
> > diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
> > index b74af641d00e..34e140f21284 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.h
> > +++ b/drivers/mmc/host/sdhci-uhs2.h
> > @@ -218,5 +218,7 @@ void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
> >  void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq);
> >  int sdhci_uhs2_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
> >  u32 sdhci_uhs2_irq(struct sdhci_host *host, u32 intmask);
> > +int sdhci_uhs2_add_host(struct sdhci_host *host);
> > +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead);
> >  
> >  #endif /* __SDHCI_UHS2_H */
> > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> > index e2dfc7767bcf..d37c3edb1ed0 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -176,10 +176,11 @@ static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
> >  	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
> >  }
> >  
> > -static void sdhci_enable_card_detection(struct sdhci_host *host)
> > +void sdhci_enable_card_detection(struct sdhci_host *host)
> >  {
> >  	sdhci_set_card_detection(host, true);
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_enable_card_detection);
> >  
> >  static void sdhci_disable_card_detection(struct sdhci_host *host)
> >  {
> > @@ -237,7 +238,7 @@ void sdhci_reset(struct sdhci_host *host, u8 mask)
> >  }
> >  EXPORT_SYMBOL_GPL(sdhci_reset);
> >  
> > -static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
> > +void sdhci_do_reset(struct sdhci_host *host, u8 mask)
> >  {
> >  	if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
> >  		struct mmc_host *mmc = host->mmc;
> > @@ -258,6 +259,7 @@ static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
> >  		host->preset_enabled = false;
> >  	}
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_do_reset);
> >  
> >  static void sdhci_set_default_irqs(struct sdhci_host *host)
> >  {
> > @@ -321,7 +323,7 @@ static void sdhci_config_dma(struct sdhci_host *host)
> >  	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
> >  }
> >  
> > -static void sdhci_init(struct sdhci_host *host, int soft)
> > +void sdhci_init(struct sdhci_host *host, int soft)
> >  {
> >  	struct mmc_host *mmc = host->mmc;
> >  	unsigned long flags;
> > @@ -346,6 +348,7 @@ static void sdhci_init(struct sdhci_host *host, int soft)
> >  		mmc->ops->set_ios(mmc, &mmc->ios);
> >  	}
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_init);
> >  
> >  static void sdhci_reinit(struct sdhci_host *host)
> >  {
> > @@ -410,7 +413,7 @@ static void sdhci_led_control(struct led_classdev *led,
> >  	spin_unlock_irqrestore(&host->lock, flags);
> >  }
> >  
> > -static int sdhci_led_register(struct sdhci_host *host)
> > +int sdhci_led_register(struct sdhci_host *host)
> >  {
> >  	struct mmc_host *mmc = host->mmc;
> >  
> > @@ -427,14 +430,16 @@ static int sdhci_led_register(struct sdhci_host *host)
> >  
> >  	return led_classdev_register(mmc_dev(mmc), &host->led);
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_led_register);
> >  
> > -static void sdhci_led_unregister(struct sdhci_host *host)
> > +void sdhci_led_unregister(struct sdhci_host *host)
> >  {
> >  	if (host->quirks & SDHCI_QUIRK_NO_LED)
> >  		return;
> >  
> >  	led_classdev_unregister(&host->led);
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_led_unregister);
> >  
> >  static inline void sdhci_led_activate(struct sdhci_host *host)
> >  {
> > @@ -3175,7 +3180,7 @@ static void sdhci_complete_work(struct work_struct *work)
> >  		;
> >  }
> >  
> > -static void sdhci_timeout_timer(struct timer_list *t)
> > +void sdhci_timeout_timer(struct timer_list *t)
> >  {
> >  	struct sdhci_host *host;
> >  	unsigned long flags;
> > @@ -3195,8 +3200,9 @@ static void sdhci_timeout_timer(struct timer_list *t)
> >  
> >  	spin_unlock_irqrestore(&host->lock, flags);
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_timeout_timer);
> >  
> > -static void sdhci_timeout_data_timer(struct timer_list *t)
> > +void sdhci_timeout_data_timer(struct timer_list *t)
> >  {
> >  	struct sdhci_host *host;
> >  	unsigned long flags;
> > @@ -3226,6 +3232,7 @@ static void sdhci_timeout_data_timer(struct timer_list *t)
> >  
> >  	spin_unlock_irqrestore(&host->lock, flags);
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_timeout_data_timer);
> >  
> >  /*****************************************************************************\
> >   *                                                                           *
> > @@ -3469,7 +3476,7 @@ static inline bool sdhci_defer_done(struct sdhci_host *host,
> >  		data->host_cookie == COOKIE_MAPPED);
> >  }
> >  
> > -static irqreturn_t sdhci_irq(int irq, void *dev_id)
> > +irqreturn_t sdhci_irq(int irq, void *dev_id)
> >  {
> >  	struct mmc_request *mrqs_done[SDHCI_MAX_MRQS] = {0};
> >  	irqreturn_t result = IRQ_NONE;
> > @@ -3609,6 +3616,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
> >  
> >  	return result;
> >  }
> > +EXPORT_SYMBOL_GPL(sdhci_irq);
> >  
> >  static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
> >  {
> > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> > index 74572b54ec47..b1d856664b58 100644
> > --- a/drivers/mmc/host/sdhci.h
> > +++ b/drivers/mmc/host/sdhci.h
> > @@ -832,8 +832,15 @@ static inline void sdhci_read_caps(struct sdhci_host *host)
> >  }
> >  
> >  bool sdhci_data_line_cmd(struct mmc_command *cmd);
> > +void sdhci_enable_card_detection(struct sdhci_host *host);
> >  void sdhci_runtime_pm_bus_on(struct sdhci_host *host);
> >  void sdhci_runtime_pm_bus_off(struct sdhci_host *host);
> > +void sdhci_do_reset(struct sdhci_host *host, u8 mask);
> > +void sdhci_init(struct sdhci_host *host, int soft);
> > +#if IS_REACHABLE(CONFIG_LEDS_CLASS)
> > +int sdhci_led_register(struct sdhci_host *host);
> > +void sdhci_led_unregister(struct sdhci_host *host);
> > +#endif
> >  void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq,
> >                       unsigned long timeout);
> >  void sdhci_initialize_data(struct sdhci_host *host, struct mmc_data *data);
> > @@ -884,6 +891,9 @@ int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
> >  void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable);
> >  void sdhci_request_done_dma(struct sdhci_host *host, struct mmc_request *mrq);
> >  bool sdhci_request_done(struct sdhci_host *host);
> > +void sdhci_timeout_timer(struct timer_list *t);
> > +void sdhci_timeout_data_timer(struct timer_list *t);
> > +irqreturn_t sdhci_irq(int irq, void *dev_id);
> >  void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
> >  			   dma_addr_t addr, int len, unsigned int cmd);
> >  
> > 
>
diff mbox series

Patch

diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index d50134e912f3..5d3362ea138f 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -15,6 +15,7 @@ 
 #include <linux/ktime.h>
 #include <linux/module.h>
 #include <linux/mmc/mmc.h>
+#include <linux/regulator/consumer.h>
 
 #include "sdhci.h"
 #include "sdhci-uhs2.h"
@@ -406,6 +407,15 @@  static inline void sdhci_led_deactivate(struct sdhci_host *host)
 {
 }
 #else
+static inline int sdhci_led_register(struct sdhci_host *host)
+{
+	return 0;
+}
+
+static inline void sdhci_led_unregister(struct sdhci_host *host)
+{
+}
+
 static inline void sdhci_led_activate(struct sdhci_host *host)
 {
 	__sdhci_led_activate(host);
@@ -1298,6 +1308,194 @@  static irqreturn_t sdhci_uhs2_thread_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+/*****************************************************************************\
+ *
+ * Device allocation/registration                                            *
+ *                                                                           *
+\*****************************************************************************/
+
+static int __sdhci_uhs2_add_host_v4(struct sdhci_host *host, u32 caps1)
+{
+	struct mmc_host *mmc;
+	u32 max_current_caps2;
+
+	if (host->version < SDHCI_SPEC_400)
+		return 0;
+
+	mmc = host->mmc;
+
+	/* Support UHS2 */
+	if (caps1 & SDHCI_SUPPORT_UHS2)
+		mmc->caps |= MMC_CAP_UHS2;
+
+	max_current_caps2 = sdhci_readl(host, SDHCI_MAX_CURRENT_1);
+
+	if ((caps1 & SDHCI_SUPPORT_VDD2_180) &&
+	    !max_current_caps2 &&
+	    !IS_ERR(mmc->supply.vmmc2)) {
+		/* UHS2 - VDD2 */
+		int curr = regulator_get_current_limit(mmc->supply.vmmc2);
+
+		if (curr > 0) {
+			/* convert to SDHCI_MAX_CURRENT format */
+			curr = curr / 1000;  /* convert to mA */
+			curr = curr / SDHCI_MAX_CURRENT_MULTIPLIER;
+			curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
+			max_current_caps2 = curr;
+		}
+	}
+
+	if (caps1 & SDHCI_SUPPORT_VDD2_180) {
+		mmc->ocr_avail_uhs2 |= MMC_VDD2_165_195;
+		/*
+		 * UHS2 doesn't require this. Only UHS-I bus needs to set
+		 * max current.
+		 */
+		mmc->max_current_180_vdd2 = (max_current_caps2 &
+					SDHCI_MAX_CURRENT_VDD2_180_MASK) *
+					SDHCI_MAX_CURRENT_MULTIPLIER;
+	} else {
+		mmc->caps &= ~MMC_CAP_UHS2;
+	}
+
+	return 0;
+}
+
+static int sdhci_uhs2_host_ops_init(struct sdhci_host *host);
+
+static int __sdhci_uhs2_add_host(struct sdhci_host *host)
+{
+	unsigned int flags = WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_HIGHPRI;
+	struct mmc_host *mmc = host->mmc;
+	int ret;
+
+	if ((mmc->caps2 & MMC_CAP2_CQE) &&
+	    (host->quirks & SDHCI_QUIRK_BROKEN_CQE)) {
+		mmc->caps2 &= ~MMC_CAP2_CQE;
+		mmc->cqe_ops = NULL;
+	}
+
+	/* overwrite ops */
+	if (mmc->caps & MMC_CAP_UHS2)
+		sdhci_uhs2_host_ops_init(host);
+
+	host->complete_wq = alloc_workqueue("sdhci", flags, 0);
+	if (!host->complete_wq)
+		return -ENOMEM;
+
+	INIT_WORK(&host->complete_work, sdhci_uhs2_complete_work);
+
+	timer_setup(&host->timer, sdhci_timeout_timer, 0);
+	timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0);
+
+	init_waitqueue_head(&host->buf_ready_int);
+
+	sdhci_init(host, 0);
+
+	ret = request_threaded_irq(host->irq, sdhci_irq,
+				   sdhci_uhs2_thread_irq,
+				   IRQF_SHARED,	mmc_hostname(mmc), host);
+	if (ret) {
+		pr_err("%s: Failed to request IRQ %d: %d\n",
+		       mmc_hostname(mmc), host->irq, ret);
+		goto unwq;
+	}
+
+	ret = sdhci_led_register(host);
+	if (ret) {
+		pr_err("%s: Failed to register LED device: %d\n",
+		       mmc_hostname(mmc), ret);
+		goto unirq;
+	}
+
+	ret = mmc_add_host(mmc);
+	if (ret)
+		goto unled;
+
+	pr_info("%s: SDHCI controller on %s [%s] using %s\n",
+		mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
+		host->use_external_dma ? "External DMA" :
+		(host->flags & SDHCI_USE_ADMA) ?
+		(host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" :
+		(host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
+
+	sdhci_enable_card_detection(host);
+
+	return 0;
+
+unled:
+	sdhci_led_unregister(host);
+unirq:
+	sdhci_do_reset(host, SDHCI_RESET_ALL);
+	sdhci_writel(host, 0, SDHCI_INT_ENABLE);
+	sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
+	free_irq(host->irq, host);
+unwq:
+	destroy_workqueue(host->complete_wq);
+
+	return ret;
+}
+
+static void __sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
+{
+	if (!(host->mmc) || !(host->mmc->flags & MMC_UHS2_SUPPORT))
+		return;
+
+	if (!dead)
+		sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL);
+
+	sdhci_writel(host, 0, SDHCI_UHS2_ERR_INT_STATUS_EN);
+	sdhci_writel(host, 0, SDHCI_UHS2_ERR_INT_SIG_EN);
+	host->mmc->flags &= ~MMC_UHS2_INITIALIZED;
+}
+
+int sdhci_uhs2_add_host(struct sdhci_host *host)
+{
+	struct mmc_host *mmc = host->mmc;
+	int ret;
+
+	ret = sdhci_setup_host(host);
+	if (ret)
+		return ret;
+
+	if (host->version >= SDHCI_SPEC_400) {
+               ret = __sdhci_uhs2_add_host_v4(host, host->caps1);
+               if (ret)
+                       goto cleanup;
+	}
+
+	if ((mmc->caps & MMC_CAP_UHS2) && !host->v4_mode)
+		/* host doesn't want to enable UHS2 support */
+		/* FIXME: Do we have to do some cleanup here? */
+		mmc->caps &= ~MMC_CAP_UHS2;
+
+	ret = __sdhci_uhs2_add_host(host);
+	if (ret)
+		goto cleanup2;
+
+	return 0;
+
+cleanup2:
+	/*
+	 * TODO: Is this a right cleanup?
+	 */
+	if (host->version >= SDHCI_SPEC_400)
+		__sdhci_uhs2_remove_host(host, 0);
+cleanup:
+	sdhci_cleanup_host(host);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_add_host);
+
+void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
+{
+	__sdhci_uhs2_remove_host(host, dead);
+
+	sdhci_uhs2_remove_host(host, dead);
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_remove_host);
+
 /*****************************************************************************\
  *                                                                           *
  * Driver init/exit                                                          *
diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
index b74af641d00e..34e140f21284 100644
--- a/drivers/mmc/host/sdhci-uhs2.h
+++ b/drivers/mmc/host/sdhci-uhs2.h
@@ -218,5 +218,7 @@  void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
 void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq);
 int sdhci_uhs2_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
 u32 sdhci_uhs2_irq(struct sdhci_host *host, u32 intmask);
+int sdhci_uhs2_add_host(struct sdhci_host *host);
+void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead);
 
 #endif /* __SDHCI_UHS2_H */
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index e2dfc7767bcf..d37c3edb1ed0 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -176,10 +176,11 @@  static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
 	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
 }
 
-static void sdhci_enable_card_detection(struct sdhci_host *host)
+void sdhci_enable_card_detection(struct sdhci_host *host)
 {
 	sdhci_set_card_detection(host, true);
 }
+EXPORT_SYMBOL_GPL(sdhci_enable_card_detection);
 
 static void sdhci_disable_card_detection(struct sdhci_host *host)
 {
@@ -237,7 +238,7 @@  void sdhci_reset(struct sdhci_host *host, u8 mask)
 }
 EXPORT_SYMBOL_GPL(sdhci_reset);
 
-static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
+void sdhci_do_reset(struct sdhci_host *host, u8 mask)
 {
 	if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
 		struct mmc_host *mmc = host->mmc;
@@ -258,6 +259,7 @@  static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
 		host->preset_enabled = false;
 	}
 }
+EXPORT_SYMBOL_GPL(sdhci_do_reset);
 
 static void sdhci_set_default_irqs(struct sdhci_host *host)
 {
@@ -321,7 +323,7 @@  static void sdhci_config_dma(struct sdhci_host *host)
 	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
 }
 
-static void sdhci_init(struct sdhci_host *host, int soft)
+void sdhci_init(struct sdhci_host *host, int soft)
 {
 	struct mmc_host *mmc = host->mmc;
 	unsigned long flags;
@@ -346,6 +348,7 @@  static void sdhci_init(struct sdhci_host *host, int soft)
 		mmc->ops->set_ios(mmc, &mmc->ios);
 	}
 }
+EXPORT_SYMBOL_GPL(sdhci_init);
 
 static void sdhci_reinit(struct sdhci_host *host)
 {
@@ -410,7 +413,7 @@  static void sdhci_led_control(struct led_classdev *led,
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
-static int sdhci_led_register(struct sdhci_host *host)
+int sdhci_led_register(struct sdhci_host *host)
 {
 	struct mmc_host *mmc = host->mmc;
 
@@ -427,14 +430,16 @@  static int sdhci_led_register(struct sdhci_host *host)
 
 	return led_classdev_register(mmc_dev(mmc), &host->led);
 }
+EXPORT_SYMBOL_GPL(sdhci_led_register);
 
-static void sdhci_led_unregister(struct sdhci_host *host)
+void sdhci_led_unregister(struct sdhci_host *host)
 {
 	if (host->quirks & SDHCI_QUIRK_NO_LED)
 		return;
 
 	led_classdev_unregister(&host->led);
 }
+EXPORT_SYMBOL_GPL(sdhci_led_unregister);
 
 static inline void sdhci_led_activate(struct sdhci_host *host)
 {
@@ -3175,7 +3180,7 @@  static void sdhci_complete_work(struct work_struct *work)
 		;
 }
 
-static void sdhci_timeout_timer(struct timer_list *t)
+void sdhci_timeout_timer(struct timer_list *t)
 {
 	struct sdhci_host *host;
 	unsigned long flags;
@@ -3195,8 +3200,9 @@  static void sdhci_timeout_timer(struct timer_list *t)
 
 	spin_unlock_irqrestore(&host->lock, flags);
 }
+EXPORT_SYMBOL_GPL(sdhci_timeout_timer);
 
-static void sdhci_timeout_data_timer(struct timer_list *t)
+void sdhci_timeout_data_timer(struct timer_list *t)
 {
 	struct sdhci_host *host;
 	unsigned long flags;
@@ -3226,6 +3232,7 @@  static void sdhci_timeout_data_timer(struct timer_list *t)
 
 	spin_unlock_irqrestore(&host->lock, flags);
 }
+EXPORT_SYMBOL_GPL(sdhci_timeout_data_timer);
 
 /*****************************************************************************\
  *                                                                           *
@@ -3469,7 +3476,7 @@  static inline bool sdhci_defer_done(struct sdhci_host *host,
 		data->host_cookie == COOKIE_MAPPED);
 }
 
-static irqreturn_t sdhci_irq(int irq, void *dev_id)
+irqreturn_t sdhci_irq(int irq, void *dev_id)
 {
 	struct mmc_request *mrqs_done[SDHCI_MAX_MRQS] = {0};
 	irqreturn_t result = IRQ_NONE;
@@ -3609,6 +3616,7 @@  static irqreturn_t sdhci_irq(int irq, void *dev_id)
 
 	return result;
 }
+EXPORT_SYMBOL_GPL(sdhci_irq);
 
 static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
 {
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 74572b54ec47..b1d856664b58 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -832,8 +832,15 @@  static inline void sdhci_read_caps(struct sdhci_host *host)
 }
 
 bool sdhci_data_line_cmd(struct mmc_command *cmd);
+void sdhci_enable_card_detection(struct sdhci_host *host);
 void sdhci_runtime_pm_bus_on(struct sdhci_host *host);
 void sdhci_runtime_pm_bus_off(struct sdhci_host *host);
+void sdhci_do_reset(struct sdhci_host *host, u8 mask);
+void sdhci_init(struct sdhci_host *host, int soft);
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+int sdhci_led_register(struct sdhci_host *host);
+void sdhci_led_unregister(struct sdhci_host *host);
+#endif
 void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq,
                      unsigned long timeout);
 void sdhci_initialize_data(struct sdhci_host *host, struct mmc_data *data);
@@ -884,6 +891,9 @@  int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
 void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable);
 void sdhci_request_done_dma(struct sdhci_host *host, struct mmc_request *mrq);
 bool sdhci_request_done(struct sdhci_host *host);
+void sdhci_timeout_timer(struct timer_list *t);
+void sdhci_timeout_data_timer(struct timer_list *t);
+irqreturn_t sdhci_irq(int irq, void *dev_id);
 void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
 			   dma_addr_t addr, int len, unsigned int cmd);