| Message ID | 20201106022726.19831-17-takahiro.akashi@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | Add support UHS-II for GL9755 | expand |
On 6/11/20 4:27 am, AKASHI Takahiro wrote: > This is a sdhci version of mmc's set_ios operation. > It covers both UHS-I and UHS-II. > > 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 | 100 ++++++++++++++++++++++++++++++++++ > drivers/mmc/host/sdhci-uhs2.h | 1 + > drivers/mmc/host/sdhci.c | 40 +++++++++----- > drivers/mmc/host/sdhci.h | 2 + > 4 files changed, 128 insertions(+), 15 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c > index d9e98c097bfe..637464748cc4 100644 > --- a/drivers/mmc/host/sdhci-uhs2.c > +++ b/drivers/mmc/host/sdhci-uhs2.c > @@ -263,6 +263,74 @@ void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) > } > EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout); > > +/** > + * sdhci_uhs2_clear_set_irqs - set Error Interrupt Status Enable register > + * @host: SDHCI host > + * @clear: bit-wise clear mask > + * @set: bit-wise set mask > + * > + * Set/unset bits in UHS-II Error Interrupt Status Enable register > + */ > +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) > +{ > + u32 ier; > + > + ier = sdhci_readl(host, SDHCI_UHS2_ERR_INT_STATUS_EN); > + ier &= ~clear; > + ier |= set; > + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_STATUS_EN); > + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_SIG_EN); > +} > +EXPORT_SYMBOL_GPL(sdhci_uhs2_clear_set_irqs); > + > +static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > +{ > + struct sdhci_host *host = mmc_priv(mmc); > + u8 cmd_res, dead_lock; > + u16 ctrl_2; > + unsigned long flags; > + > + /* FIXME: why lock? */ > + spin_lock_irqsave(&host->lock, flags); > + > + /* UHS2 Timeout Control */ > + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock); > + > + /* change to use calculate value */ > + cmd_res |= dead_lock << SDHCI_UHS2_TIMER_CTRL_DEADLOCK_SHIFT; > + > + sdhci_uhs2_clear_set_irqs(host, > + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | > + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT, > + 0); > + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL); > + sdhci_uhs2_clear_set_irqs(host, 0, > + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | > + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT); > + > + /* UHS2 timing */ > + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); > + if (ios->timing == MMC_TIMING_UHS2) > + ctrl_2 |= SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN; > + else > + ctrl_2 &= ~(SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN); > + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); > + > + if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) > + sdhci_enable_preset_value(host, true); > + > + if (host->ops->set_power) > + host->ops->set_power(host, ios->power_mode, ios->vdd); > + else > + sdhci_set_power(host, ios->power_mode, ios->vdd); > + udelay(100); > + > + host->timing = ios->timing; > + sdhci_set_clock(host, host->clock); sdhci_set_ios_common() already called ->set_clock() and ->set_power(), so I am not really following what is going on here. Can you explain some more? > + > + spin_unlock_irqrestore(&host->lock, flags); > +} > + > /*****************************************************************************\ > * * > * MMC callbacks * > @@ -286,6 +354,37 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc, > return sdhci_start_signal_voltage_switch(mmc, ios); > } > > +void sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > +{ > + struct sdhci_host *host = mmc_priv(mmc); > + > + if (!(host->version >= SDHCI_SPEC_400) || > + !(host->mmc->flags & MMC_UHS2_SUPPORT && > + host->mmc->caps & MMC_CAP_UHS2)) { > + sdhci_set_ios(mmc, ios); > + return; > + } > + > + if (ios->power_mode == MMC_POWER_UNDEFINED) > + return; > + > + if (host->flags & SDHCI_DEVICE_DEAD) { > + if (!IS_ERR(mmc->supply.vmmc) && > + ios->power_mode == MMC_POWER_OFF) > + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > + if (!IS_ERR_OR_NULL(mmc->supply.vmmc2) && > + ios->power_mode == MMC_POWER_OFF) > + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); > + return; > + } > + > + /* FIXME: host->timing = ios->timing */ > + > + sdhci_set_ios_common(mmc, ios); > + > + __sdhci_uhs2_set_ios(mmc, ios); > +} > + > /*****************************************************************************\ > * * > * Driver init/exit * > @@ -296,6 +395,7 @@ 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.set_ios = sdhci_uhs2_set_ios; > > return 0; > } > diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h > index efe70577bc74..c1ff4ac1ab7a 100644 > --- a/drivers/mmc/host/sdhci-uhs2.h > +++ b/drivers/mmc/host/sdhci-uhs2.h > @@ -214,5 +214,6 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask); > void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, > unsigned short vdd); > void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); > +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set); > > #endif /* __SDHCI_UHS2_H */ > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index 0b741eb546cb..becb228330af 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -48,8 +48,6 @@ > static unsigned int debug_quirks = 0; > static unsigned int debug_quirks2; > > -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable); > - > static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd); > > void sdhci_dumpregs(struct sdhci_host *host) > @@ -1836,6 +1834,9 @@ static u16 sdhci_get_preset_value(struct sdhci_host *host) > case MMC_TIMING_MMC_HS400: > preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400); > break; > + case MMC_TIMING_UHS2: > + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2); > + break; > default: > pr_warn("%s: Invalid UHS-I mode selected\n", > mmc_hostname(host->mmc)); > @@ -2249,20 +2250,9 @@ void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing) > } > EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling); > > -void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios) > { > struct sdhci_host *host = mmc_priv(mmc); > - u8 ctrl; > - > - if (ios->power_mode == MMC_POWER_UNDEFINED) > - return; > - > - if (host->flags & SDHCI_DEVICE_DEAD) { > - if (!IS_ERR(mmc->supply.vmmc) && > - ios->power_mode == MMC_POWER_OFF) > - mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > - return; > - } > > /* > * Reset the chip on each power off. > @@ -2299,6 +2289,25 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > host->ops->set_power(host, ios->power_mode, ios->vdd); > else > sdhci_set_power(host, ios->power_mode, ios->vdd); > +} > +EXPORT_SYMBOL_GPL(sdhci_set_ios_common); > + > +void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > +{ > + struct sdhci_host *host = mmc_priv(mmc); > + u8 ctrl; > + > + if (ios->power_mode == MMC_POWER_UNDEFINED) > + return; > + > + if (host->flags & SDHCI_DEVICE_DEAD) { > + if (!IS_ERR(mmc->supply.vmmc) && > + ios->power_mode == MMC_POWER_OFF) > + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > + return; > + } > + > + sdhci_set_ios_common(mmc, ios); > > if (host->ops->platform_send_init_74_clocks) > host->ops->platform_send_init_74_clocks(host, ios->power_mode); > @@ -2869,7 +2878,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) > } > EXPORT_SYMBOL_GPL(sdhci_execute_tuning); > > -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) > +void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) > { > /* Host Controller v3.00 defines preset value registers */ > if (host->version < SDHCI_SPEC_300) > @@ -2897,6 +2906,7 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) > host->preset_enabled = enable; > } > } > +EXPORT_SYMBOL_GPL(sdhci_enable_preset_value); > > static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq, > int err) > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > index 2b5b8295cf92..e84ebddb20d8 100644 > --- a/drivers/mmc/host/sdhci.h > +++ b/drivers/mmc/host/sdhci.h > @@ -851,6 +851,8 @@ void sdhci_set_bus_width(struct sdhci_host *host, int width); > void sdhci_reset(struct sdhci_host *host, u8 mask); > 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); > +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios); > void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); > int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, > struct mmc_ios *ios); >
On Thu, Nov 26, 2020 at 10:17:11AM +0200, Adrian Hunter wrote: > On 6/11/20 4:27 am, AKASHI Takahiro wrote: > > This is a sdhci version of mmc's set_ios operation. > > It covers both UHS-I and UHS-II. > > > > 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 | 100 ++++++++++++++++++++++++++++++++++ > > drivers/mmc/host/sdhci-uhs2.h | 1 + > > drivers/mmc/host/sdhci.c | 40 +++++++++----- > > drivers/mmc/host/sdhci.h | 2 + > > 4 files changed, 128 insertions(+), 15 deletions(-) > > > > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c > > index d9e98c097bfe..637464748cc4 100644 > > --- a/drivers/mmc/host/sdhci-uhs2.c > > +++ b/drivers/mmc/host/sdhci-uhs2.c > > @@ -263,6 +263,74 @@ void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) > > } > > EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout); > > > > +/** > > + * sdhci_uhs2_clear_set_irqs - set Error Interrupt Status Enable register > > + * @host: SDHCI host > > + * @clear: bit-wise clear mask > > + * @set: bit-wise set mask > > + * > > + * Set/unset bits in UHS-II Error Interrupt Status Enable register > > + */ > > +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) > > +{ > > + u32 ier; > > + > > + ier = sdhci_readl(host, SDHCI_UHS2_ERR_INT_STATUS_EN); > > + ier &= ~clear; > > + ier |= set; > > + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_STATUS_EN); > > + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_SIG_EN); > > +} > > +EXPORT_SYMBOL_GPL(sdhci_uhs2_clear_set_irqs); > > + > > +static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > > +{ > > + struct sdhci_host *host = mmc_priv(mmc); > > + u8 cmd_res, dead_lock; > > + u16 ctrl_2; > > + unsigned long flags; > > + > > + /* FIXME: why lock? */ > > + spin_lock_irqsave(&host->lock, flags); > > + > > + /* UHS2 Timeout Control */ > > + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock); > > + > > + /* change to use calculate value */ > > + cmd_res |= dead_lock << SDHCI_UHS2_TIMER_CTRL_DEADLOCK_SHIFT; > > + > > + sdhci_uhs2_clear_set_irqs(host, > > + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | > > + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT, > > + 0); > > + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL); > > + sdhci_uhs2_clear_set_irqs(host, 0, > > + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | > > + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT); > > + > > + /* UHS2 timing */ > > + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); > > + if (ios->timing == MMC_TIMING_UHS2) > > + ctrl_2 |= SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN; > > + else > > + ctrl_2 &= ~(SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN); > > + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); > > + > > + if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) > > + sdhci_enable_preset_value(host, true); > > + > > + if (host->ops->set_power) > > + host->ops->set_power(host, ios->power_mode, ios->vdd); > > + else > > + sdhci_set_power(host, ios->power_mode, ios->vdd); > > + udelay(100); > > + > > + host->timing = ios->timing; > > + sdhci_set_clock(host, host->clock); > > sdhci_set_ios_common() already called ->set_clock() and ->set_power(), so I > am not really following what is going on here. Can you explain some more? To be frank, I don't know. The logic in Intel's (and/or Ben's?) original code does so. What I changed is to remove the code of setting (ios->vdd and) ios->vdd2, which is executed before calling set_power(), in __sdhci_uhs2_set_ios(). So yes, effectively it may be of no use to call set_power() here. -Takahiro Akashi > > + > > + spin_unlock_irqrestore(&host->lock, flags); > > +} > > + > > /*****************************************************************************\ > > * * > > * MMC callbacks * > > @@ -286,6 +354,37 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc, > > return sdhci_start_signal_voltage_switch(mmc, ios); > > } > > > > +void sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > > +{ > > + struct sdhci_host *host = mmc_priv(mmc); > > + > > + if (!(host->version >= SDHCI_SPEC_400) || > > + !(host->mmc->flags & MMC_UHS2_SUPPORT && > > + host->mmc->caps & MMC_CAP_UHS2)) { > > + sdhci_set_ios(mmc, ios); > > + return; > > + } > > + > > + if (ios->power_mode == MMC_POWER_UNDEFINED) > > + return; > > + > > + if (host->flags & SDHCI_DEVICE_DEAD) { > > + if (!IS_ERR(mmc->supply.vmmc) && > > + ios->power_mode == MMC_POWER_OFF) > > + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > > + if (!IS_ERR_OR_NULL(mmc->supply.vmmc2) && > > + ios->power_mode == MMC_POWER_OFF) > > + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); > > + return; > > + } > > + > > + /* FIXME: host->timing = ios->timing */ > > + > > + sdhci_set_ios_common(mmc, ios); > > + > > + __sdhci_uhs2_set_ios(mmc, ios); > > +} > > + > > /*****************************************************************************\ > > * * > > * Driver init/exit * > > @@ -296,6 +395,7 @@ 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.set_ios = sdhci_uhs2_set_ios; > > > > return 0; > > } > > diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h > > index efe70577bc74..c1ff4ac1ab7a 100644 > > --- a/drivers/mmc/host/sdhci-uhs2.h > > +++ b/drivers/mmc/host/sdhci-uhs2.h > > @@ -214,5 +214,6 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask); > > void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, > > unsigned short vdd); > > void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); > > +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set); > > > > #endif /* __SDHCI_UHS2_H */ > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > > index 0b741eb546cb..becb228330af 100644 > > --- a/drivers/mmc/host/sdhci.c > > +++ b/drivers/mmc/host/sdhci.c > > @@ -48,8 +48,6 @@ > > static unsigned int debug_quirks = 0; > > static unsigned int debug_quirks2; > > > > -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable); > > - > > static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd); > > > > void sdhci_dumpregs(struct sdhci_host *host) > > @@ -1836,6 +1834,9 @@ static u16 sdhci_get_preset_value(struct sdhci_host *host) > > case MMC_TIMING_MMC_HS400: > > preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400); > > break; > > + case MMC_TIMING_UHS2: > > + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2); > > + break; > > default: > > pr_warn("%s: Invalid UHS-I mode selected\n", > > mmc_hostname(host->mmc)); > > @@ -2249,20 +2250,9 @@ void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing) > > } > > EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling); > > > > -void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > > +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios) > > { > > struct sdhci_host *host = mmc_priv(mmc); > > - u8 ctrl; > > - > > - if (ios->power_mode == MMC_POWER_UNDEFINED) > > - return; > > - > > - if (host->flags & SDHCI_DEVICE_DEAD) { > > - if (!IS_ERR(mmc->supply.vmmc) && > > - ios->power_mode == MMC_POWER_OFF) > > - mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > > - return; > > - } > > > > /* > > * Reset the chip on each power off. > > @@ -2299,6 +2289,25 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > > host->ops->set_power(host, ios->power_mode, ios->vdd); > > else > > sdhci_set_power(host, ios->power_mode, ios->vdd); > > +} > > +EXPORT_SYMBOL_GPL(sdhci_set_ios_common); > > + > > +void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > > +{ > > + struct sdhci_host *host = mmc_priv(mmc); > > + u8 ctrl; > > + > > + if (ios->power_mode == MMC_POWER_UNDEFINED) > > + return; > > + > > + if (host->flags & SDHCI_DEVICE_DEAD) { > > + if (!IS_ERR(mmc->supply.vmmc) && > > + ios->power_mode == MMC_POWER_OFF) > > + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > > + return; > > + } > > + > > + sdhci_set_ios_common(mmc, ios); > > > > if (host->ops->platform_send_init_74_clocks) > > host->ops->platform_send_init_74_clocks(host, ios->power_mode); > > @@ -2869,7 +2878,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) > > } > > EXPORT_SYMBOL_GPL(sdhci_execute_tuning); > > > > -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) > > +void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) > > { > > /* Host Controller v3.00 defines preset value registers */ > > if (host->version < SDHCI_SPEC_300) > > @@ -2897,6 +2906,7 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) > > host->preset_enabled = enable; > > } > > } > > +EXPORT_SYMBOL_GPL(sdhci_enable_preset_value); > > > > static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq, > > int err) > > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > > index 2b5b8295cf92..e84ebddb20d8 100644 > > --- a/drivers/mmc/host/sdhci.h > > +++ b/drivers/mmc/host/sdhci.h > > @@ -851,6 +851,8 @@ void sdhci_set_bus_width(struct sdhci_host *host, int width); > > void sdhci_reset(struct sdhci_host *host, u8 mask); > > 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); > > +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios); > > void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); > > int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, > > struct mmc_ios *ios); > > >
On 30/11/20 9:51 am, AKASHI Takahiro wrote: > On Thu, Nov 26, 2020 at 10:17:11AM +0200, Adrian Hunter wrote: >> On 6/11/20 4:27 am, AKASHI Takahiro wrote: >>> This is a sdhci version of mmc's set_ios operation. >>> It covers both UHS-I and UHS-II. >>> >>> 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 | 100 ++++++++++++++++++++++++++++++++++ >>> drivers/mmc/host/sdhci-uhs2.h | 1 + >>> drivers/mmc/host/sdhci.c | 40 +++++++++----- >>> drivers/mmc/host/sdhci.h | 2 + >>> 4 files changed, 128 insertions(+), 15 deletions(-) >>> >>> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c >>> index d9e98c097bfe..637464748cc4 100644 >>> --- a/drivers/mmc/host/sdhci-uhs2.c >>> +++ b/drivers/mmc/host/sdhci-uhs2.c >>> @@ -263,6 +263,74 @@ void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) >>> } >>> EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout); >>> >>> +/** >>> + * sdhci_uhs2_clear_set_irqs - set Error Interrupt Status Enable register >>> + * @host: SDHCI host >>> + * @clear: bit-wise clear mask >>> + * @set: bit-wise set mask >>> + * >>> + * Set/unset bits in UHS-II Error Interrupt Status Enable register >>> + */ >>> +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) >>> +{ >>> + u32 ier; >>> + >>> + ier = sdhci_readl(host, SDHCI_UHS2_ERR_INT_STATUS_EN); >>> + ier &= ~clear; >>> + ier |= set; >>> + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_STATUS_EN); >>> + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_SIG_EN); >>> +} >>> +EXPORT_SYMBOL_GPL(sdhci_uhs2_clear_set_irqs); >>> + >>> +static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) >>> +{ >>> + struct sdhci_host *host = mmc_priv(mmc); >>> + u8 cmd_res, dead_lock; >>> + u16 ctrl_2; >>> + unsigned long flags; >>> + >>> + /* FIXME: why lock? */ >>> + spin_lock_irqsave(&host->lock, flags); >>> + >>> + /* UHS2 Timeout Control */ >>> + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock); >>> + >>> + /* change to use calculate value */ >>> + cmd_res |= dead_lock << SDHCI_UHS2_TIMER_CTRL_DEADLOCK_SHIFT; >>> + >>> + sdhci_uhs2_clear_set_irqs(host, >>> + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | >>> + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT, >>> + 0); >>> + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL); >>> + sdhci_uhs2_clear_set_irqs(host, 0, >>> + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | >>> + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT); >>> + >>> + /* UHS2 timing */ >>> + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); >>> + if (ios->timing == MMC_TIMING_UHS2) >>> + ctrl_2 |= SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN; >>> + else >>> + ctrl_2 &= ~(SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN); >>> + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); >>> + >>> + if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) >>> + sdhci_enable_preset_value(host, true); >>> + >>> + if (host->ops->set_power) >>> + host->ops->set_power(host, ios->power_mode, ios->vdd); >>> + else >>> + sdhci_set_power(host, ios->power_mode, ios->vdd); >>> + udelay(100); >>> + >>> + host->timing = ios->timing; >>> + sdhci_set_clock(host, host->clock); >> >> sdhci_set_ios_common() already called ->set_clock() and ->set_power(), so I >> am not really following what is going on here. Can you explain some more? > > To be frank, I don't know. The logic in Intel's (and/or Ben's?) > original code does so. > What I changed is to remove the code of setting (ios->vdd and) ios->vdd2, > which is executed before calling set_power(), in __sdhci_uhs2_set_ios(). > > So yes, effectively it may be of no use to call set_power() here. Please try to rationalize it. Also set_ios() should not need the spin lock, and that allows clock and power callbacks to sleep if needed. > > -Takahiro Akashi > >>> + >>> + spin_unlock_irqrestore(&host->lock, flags); >>> +} >>> + >>> /*****************************************************************************\ >>> * * >>> * MMC callbacks * >>> @@ -286,6 +354,37 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc, >>> return sdhci_start_signal_voltage_switch(mmc, ios); >>> } >>> >>> +void sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) >>> +{ >>> + struct sdhci_host *host = mmc_priv(mmc); >>> + >>> + if (!(host->version >= SDHCI_SPEC_400) || >>> + !(host->mmc->flags & MMC_UHS2_SUPPORT && >>> + host->mmc->caps & MMC_CAP_UHS2)) { >>> + sdhci_set_ios(mmc, ios); >>> + return; >>> + } >>> + >>> + if (ios->power_mode == MMC_POWER_UNDEFINED) >>> + return; >>> + >>> + if (host->flags & SDHCI_DEVICE_DEAD) { >>> + if (!IS_ERR(mmc->supply.vmmc) && >>> + ios->power_mode == MMC_POWER_OFF) >>> + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); >>> + if (!IS_ERR_OR_NULL(mmc->supply.vmmc2) && >>> + ios->power_mode == MMC_POWER_OFF) >>> + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); >>> + return; >>> + } >>> + >>> + /* FIXME: host->timing = ios->timing */ >>> + >>> + sdhci_set_ios_common(mmc, ios); >>> + >>> + __sdhci_uhs2_set_ios(mmc, ios); >>> +} >>> + >>> /*****************************************************************************\ >>> * * >>> * Driver init/exit * >>> @@ -296,6 +395,7 @@ 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.set_ios = sdhci_uhs2_set_ios; >>> >>> return 0; >>> } >>> diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h >>> index efe70577bc74..c1ff4ac1ab7a 100644 >>> --- a/drivers/mmc/host/sdhci-uhs2.h >>> +++ b/drivers/mmc/host/sdhci-uhs2.h >>> @@ -214,5 +214,6 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask); >>> void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, >>> unsigned short vdd); >>> void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); >>> +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set); >>> >>> #endif /* __SDHCI_UHS2_H */ >>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c >>> index 0b741eb546cb..becb228330af 100644 >>> --- a/drivers/mmc/host/sdhci.c >>> +++ b/drivers/mmc/host/sdhci.c >>> @@ -48,8 +48,6 @@ >>> static unsigned int debug_quirks = 0; >>> static unsigned int debug_quirks2; >>> >>> -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable); >>> - >>> static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd); >>> >>> void sdhci_dumpregs(struct sdhci_host *host) >>> @@ -1836,6 +1834,9 @@ static u16 sdhci_get_preset_value(struct sdhci_host *host) >>> case MMC_TIMING_MMC_HS400: >>> preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400); >>> break; >>> + case MMC_TIMING_UHS2: >>> + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2); >>> + break; >>> default: >>> pr_warn("%s: Invalid UHS-I mode selected\n", >>> mmc_hostname(host->mmc)); >>> @@ -2249,20 +2250,9 @@ void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing) >>> } >>> EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling); >>> >>> -void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) >>> +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios) >>> { >>> struct sdhci_host *host = mmc_priv(mmc); >>> - u8 ctrl; >>> - >>> - if (ios->power_mode == MMC_POWER_UNDEFINED) >>> - return; >>> - >>> - if (host->flags & SDHCI_DEVICE_DEAD) { >>> - if (!IS_ERR(mmc->supply.vmmc) && >>> - ios->power_mode == MMC_POWER_OFF) >>> - mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); >>> - return; >>> - } >>> >>> /* >>> * Reset the chip on each power off. >>> @@ -2299,6 +2289,25 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) >>> host->ops->set_power(host, ios->power_mode, ios->vdd); >>> else >>> sdhci_set_power(host, ios->power_mode, ios->vdd); >>> +} >>> +EXPORT_SYMBOL_GPL(sdhci_set_ios_common); >>> + >>> +void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) >>> +{ >>> + struct sdhci_host *host = mmc_priv(mmc); >>> + u8 ctrl; >>> + >>> + if (ios->power_mode == MMC_POWER_UNDEFINED) >>> + return; >>> + >>> + if (host->flags & SDHCI_DEVICE_DEAD) { >>> + if (!IS_ERR(mmc->supply.vmmc) && >>> + ios->power_mode == MMC_POWER_OFF) >>> + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); >>> + return; >>> + } >>> + >>> + sdhci_set_ios_common(mmc, ios); >>> >>> if (host->ops->platform_send_init_74_clocks) >>> host->ops->platform_send_init_74_clocks(host, ios->power_mode); >>> @@ -2869,7 +2878,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) >>> } >>> EXPORT_SYMBOL_GPL(sdhci_execute_tuning); >>> >>> -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) >>> +void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) >>> { >>> /* Host Controller v3.00 defines preset value registers */ >>> if (host->version < SDHCI_SPEC_300) >>> @@ -2897,6 +2906,7 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) >>> host->preset_enabled = enable; >>> } >>> } >>> +EXPORT_SYMBOL_GPL(sdhci_enable_preset_value); >>> >>> static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq, >>> int err) >>> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h >>> index 2b5b8295cf92..e84ebddb20d8 100644 >>> --- a/drivers/mmc/host/sdhci.h >>> +++ b/drivers/mmc/host/sdhci.h >>> @@ -851,6 +851,8 @@ void sdhci_set_bus_width(struct sdhci_host *host, int width); >>> void sdhci_reset(struct sdhci_host *host, u8 mask); >>> 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); >>> +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios); >>> void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); >>> int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, >>> struct mmc_ios *ios); >>> >>
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index d9e98c097bfe..637464748cc4 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -263,6 +263,74 @@ void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) } EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout); +/** + * sdhci_uhs2_clear_set_irqs - set Error Interrupt Status Enable register + * @host: SDHCI host + * @clear: bit-wise clear mask + * @set: bit-wise set mask + * + * Set/unset bits in UHS-II Error Interrupt Status Enable register + */ +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) +{ + u32 ier; + + ier = sdhci_readl(host, SDHCI_UHS2_ERR_INT_STATUS_EN); + ier &= ~clear; + ier |= set; + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_STATUS_EN); + sdhci_writel(host, ier, SDHCI_UHS2_ERR_INT_SIG_EN); +} +EXPORT_SYMBOL_GPL(sdhci_uhs2_clear_set_irqs); + +static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct sdhci_host *host = mmc_priv(mmc); + u8 cmd_res, dead_lock; + u16 ctrl_2; + unsigned long flags; + + /* FIXME: why lock? */ + spin_lock_irqsave(&host->lock, flags); + + /* UHS2 Timeout Control */ + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock); + + /* change to use calculate value */ + cmd_res |= dead_lock << SDHCI_UHS2_TIMER_CTRL_DEADLOCK_SHIFT; + + sdhci_uhs2_clear_set_irqs(host, + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT, + 0); + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL); + sdhci_uhs2_clear_set_irqs(host, 0, + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT); + + /* UHS2 timing */ + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); + if (ios->timing == MMC_TIMING_UHS2) + ctrl_2 |= SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN; + else + ctrl_2 &= ~(SDHCI_CTRL_UHS_2 | SDHCI_CTRL_UHS2_INTERFACE_EN); + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); + + if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) + sdhci_enable_preset_value(host, true); + + if (host->ops->set_power) + host->ops->set_power(host, ios->power_mode, ios->vdd); + else + sdhci_set_power(host, ios->power_mode, ios->vdd); + udelay(100); + + host->timing = ios->timing; + sdhci_set_clock(host, host->clock); + + spin_unlock_irqrestore(&host->lock, flags); +} + /*****************************************************************************\ * * * MMC callbacks * @@ -286,6 +354,37 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc, return sdhci_start_signal_voltage_switch(mmc, ios); } +void sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct sdhci_host *host = mmc_priv(mmc); + + if (!(host->version >= SDHCI_SPEC_400) || + !(host->mmc->flags & MMC_UHS2_SUPPORT && + host->mmc->caps & MMC_CAP_UHS2)) { + sdhci_set_ios(mmc, ios); + return; + } + + if (ios->power_mode == MMC_POWER_UNDEFINED) + return; + + if (host->flags & SDHCI_DEVICE_DEAD) { + if (!IS_ERR(mmc->supply.vmmc) && + ios->power_mode == MMC_POWER_OFF) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + if (!IS_ERR_OR_NULL(mmc->supply.vmmc2) && + ios->power_mode == MMC_POWER_OFF) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); + return; + } + + /* FIXME: host->timing = ios->timing */ + + sdhci_set_ios_common(mmc, ios); + + __sdhci_uhs2_set_ios(mmc, ios); +} + /*****************************************************************************\ * * * Driver init/exit * @@ -296,6 +395,7 @@ 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.set_ios = sdhci_uhs2_set_ios; return 0; } diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h index efe70577bc74..c1ff4ac1ab7a 100644 --- a/drivers/mmc/host/sdhci-uhs2.h +++ b/drivers/mmc/host/sdhci-uhs2.h @@ -214,5 +214,6 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask); void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd); void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set); #endif /* __SDHCI_UHS2_H */ diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 0b741eb546cb..becb228330af 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -48,8 +48,6 @@ static unsigned int debug_quirks = 0; static unsigned int debug_quirks2; -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable); - static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd); void sdhci_dumpregs(struct sdhci_host *host) @@ -1836,6 +1834,9 @@ static u16 sdhci_get_preset_value(struct sdhci_host *host) case MMC_TIMING_MMC_HS400: preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400); break; + case MMC_TIMING_UHS2: + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2); + break; default: pr_warn("%s: Invalid UHS-I mode selected\n", mmc_hostname(host->mmc)); @@ -2249,20 +2250,9 @@ void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing) } EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling); -void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios) { struct sdhci_host *host = mmc_priv(mmc); - u8 ctrl; - - if (ios->power_mode == MMC_POWER_UNDEFINED) - return; - - if (host->flags & SDHCI_DEVICE_DEAD) { - if (!IS_ERR(mmc->supply.vmmc) && - ios->power_mode == MMC_POWER_OFF) - mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); - return; - } /* * Reset the chip on each power off. @@ -2299,6 +2289,25 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) host->ops->set_power(host, ios->power_mode, ios->vdd); else sdhci_set_power(host, ios->power_mode, ios->vdd); +} +EXPORT_SYMBOL_GPL(sdhci_set_ios_common); + +void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct sdhci_host *host = mmc_priv(mmc); + u8 ctrl; + + if (ios->power_mode == MMC_POWER_UNDEFINED) + return; + + if (host->flags & SDHCI_DEVICE_DEAD) { + if (!IS_ERR(mmc->supply.vmmc) && + ios->power_mode == MMC_POWER_OFF) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + return; + } + + sdhci_set_ios_common(mmc, ios); if (host->ops->platform_send_init_74_clocks) host->ops->platform_send_init_74_clocks(host, ios->power_mode); @@ -2869,7 +2878,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) } EXPORT_SYMBOL_GPL(sdhci_execute_tuning); -static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) +void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) { /* Host Controller v3.00 defines preset value registers */ if (host->version < SDHCI_SPEC_300) @@ -2897,6 +2906,7 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) host->preset_enabled = enable; } } +EXPORT_SYMBOL_GPL(sdhci_enable_preset_value); static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq, int err) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 2b5b8295cf92..e84ebddb20d8 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -851,6 +851,8 @@ void sdhci_set_bus_width(struct sdhci_host *host, int width); void sdhci_reset(struct sdhci_host *host, u8 mask); 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); +void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios); void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios);