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>
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
---
drivers/mmc/host/sdhci-uhs2.c | 96 +++++++++++++++++++++++++++++++++++
drivers/mmc/host/sdhci-uhs2.h | 1 +
drivers/mmc/host/sdhci.c | 53 +++++++++++--------
drivers/mmc/host/sdhci.h | 2 +
4 files changed, 131 insertions(+), 21 deletions(-)
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index 00b1b69b49ea..3d52d35a91a5 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -213,6 +213,68 @@ 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_INT_STATUS_ENABLE);
+ ier &= ~clear;
+ ier |= set;
+ sdhci_writel(host, ier, SDHCI_UHS2_INT_STATUS_ENABLE);
+ sdhci_writel(host, ier, SDHCI_UHS2_INT_SIGNAL_ENABLE);
+}
+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;
+
+ /* UHS2 Timeout Control */
+ sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
+
+ /* change to use calculate value */
+ cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
+
+ sdhci_uhs2_clear_set_irqs(host,
+ SDHCI_UHS2_INT_CMD_TIMEOUT |
+ SDHCI_UHS2_INT_DEADLOCK_TIMEOUT,
+ 0);
+ sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
+ sdhci_uhs2_clear_set_irqs(host, 0,
+ SDHCI_UHS2_INT_CMD_TIMEOUT |
+ SDHCI_UHS2_INT_DEADLOCK_TIMEOUT);
+
+ /* UHS2 timing */
+ ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ if (ios->timing == MMC_TIMING_SD_UHS2)
+ ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
+ else
+ ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
+ 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_uhs2_set_power(host, ios->power_mode, ios->vdd);
+ udelay(100);
+
+ host->timing = ios->timing;
+ sdhci_set_clock(host, host->clock);
+}
+
/*****************************************************************************\
* *
* MMC callbacks *
@@ -234,6 +296,39 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc,
return sdhci_start_signal_voltage_switch(mmc, ios);
}
+int 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->caps2 & MMC_CAP2_SD_UHS2)) {
+ sdhci_set_ios(mmc, ios);
+ return 0;
+ }
+
+ if (ios->power_mode == MMC_POWER_UNDEFINED)
+ return 0;
+
+ 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 -1;
+ }
+
+ host->timing = ios->timing;
+
+ sdhci_set_ios_common(mmc, ios);
+
+ __sdhci_uhs2_set_ios(mmc, ios);
+
+ return 0;
+}
+
/*****************************************************************************\
* *
* Driver init/exit *
@@ -244,6 +339,7 @@ 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;
return 0;
}
diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
index a58ef19c08aa..184fee80253c 100644
--- a/drivers/mmc/host/sdhci-uhs2.h
+++ b/drivers/mmc/host/sdhci-uhs2.h
@@ -178,5 +178,6 @@ void sdhci_uhs2_dump_regs(struct sdhci_host *host);
bool sdhci_uhs2_mode(struct sdhci_host *host);
void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
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 99633a3ef549..49bbdc155b2b 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -47,8 +47,6 @@
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)
@@ -1877,6 +1875,9 @@ 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_SD_UHS2:
+ preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2);
+ break;
default:
pr_warn("%s: Invalid UHS-I mode selected\n",
mmc_hostname(host->mmc));
@@ -2325,24 +2326,9 @@ static bool sdhci_presetable_values_change(struct sdhci_host *host, struct mmc_i
(sdhci_preset_needed(host, ios->timing) || host->drv_type != ios->drv_type);
}
-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);
- bool reinit_uhs = host->reinit_uhs;
- bool turning_on_clk = false;
- u8 ctrl;
-
- host->reinit_uhs = false;
-
- 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.
@@ -2359,8 +2345,6 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
sdhci_enable_preset_value(host, false);
if (!ios->clock || ios->clock != host->clock) {
- turning_on_clk = ios->clock && !host->clock;
-
host->ops->set_clock(host, ios->clock);
host->clock = ios->clock;
@@ -2381,6 +2365,32 @@ 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);
+ bool reinit_uhs = host->reinit_uhs;
+ bool turning_on_clk = false;
+ u8 ctrl;
+
+ host->reinit_uhs = false;
+
+ 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 (!ios->clock || ios->clock != host->clock)
+ turning_on_clk = ios->clock && !host->clock;
if (host->ops->platform_send_init_74_clocks)
host->ops->platform_send_init_74_clocks(host, ios->power_mode);
@@ -2959,7 +2969,7 @@ 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)
@@ -2987,6 +2997,7 @@ 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 df7fa0c0ebf8..c2f989dc2361 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -850,6 +850,8 @@ 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);
--
2.25.1On 13/12/22 11:00, Victor Shih 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>
> Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
> ---
> drivers/mmc/host/sdhci-uhs2.c | 96 +++++++++++++++++++++++++++++++++++
> drivers/mmc/host/sdhci-uhs2.h | 1 +
> drivers/mmc/host/sdhci.c | 53 +++++++++++--------
> drivers/mmc/host/sdhci.h | 2 +
> 4 files changed, 131 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> index 00b1b69b49ea..3d52d35a91a5 100644
> --- a/drivers/mmc/host/sdhci-uhs2.c
> +++ b/drivers/mmc/host/sdhci-uhs2.c
> @@ -213,6 +213,68 @@ 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_INT_STATUS_ENABLE);
> + ier &= ~clear;
> + ier |= set;
> + sdhci_writel(host, ier, SDHCI_UHS2_INT_STATUS_ENABLE);
> + sdhci_writel(host, ier, SDHCI_UHS2_INT_SIGNAL_ENABLE);
> +}
> +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;
> +
> + /* UHS2 Timeout Control */
> + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
> +
> + /* change to use calculate value */
> + cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
> +
> + sdhci_uhs2_clear_set_irqs(host,
> + SDHCI_UHS2_INT_CMD_TIMEOUT |
> + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT,
> + 0);
> + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
> + sdhci_uhs2_clear_set_irqs(host, 0,
> + SDHCI_UHS2_INT_CMD_TIMEOUT |
> + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT);
> +
> + /* UHS2 timing */
Please extend comment to include:
Note, UHS2 timing is disabled when powering off
> + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> + if (ios->timing == MMC_TIMING_SD_UHS2)
> + ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
> + else
> + ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
> + 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_uhs2_set_power(host, ios->power_mode, ios->vdd);
sdhci_set_ios_common() already set the power. Are both needed?
> + udelay(100);
Please add a comment for why this delay is here.
> +
> + host->timing = ios->timing;
Please move this up to where the timing change is.
> + sdhci_set_clock(host, host->clock);
> +}
> +
> /*****************************************************************************\
> * *
> * MMC callbacks *
> @@ -234,6 +296,39 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc,
> return sdhci_start_signal_voltage_switch(mmc, ios);
> }
>
> +int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
Should be static
> +{
> + struct sdhci_host *host = mmc_priv(mmc);
> +
> + if (!(host->version >= SDHCI_SPEC_400) ||
> + !(host->mmc->flags & MMC_UHS2_SUPPORT &&
> + host->mmc->caps2 & MMC_CAP2_SD_UHS2)) {
This can be just:
if (!sdhci_uhs2_mode(host)) {
Not sure if this is actually possible?
> + sdhci_set_ios(mmc, ios);
> + return 0;
> + }
> +
> + if (ios->power_mode == MMC_POWER_UNDEFINED)
> + return 0;
> +
> + 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);
This can be just:
if (ios->power_mode == MMC_POWER_OFF) {
mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0);
}
> + return -1;
> + }
> +
> + host->timing = ios->timing;
__sdhci_uhs2_set_ios() does this so it is not needed here.
> +
> + sdhci_set_ios_common(mmc, ios);
> +
> + __sdhci_uhs2_set_ios(mmc, ios);
> +
> + return 0;
> +}
> +
> /*****************************************************************************\
> * *
> * Driver init/exit *
> @@ -244,6 +339,7 @@ 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;
>
> return 0;
> }
> diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
> index a58ef19c08aa..184fee80253c 100644
> --- a/drivers/mmc/host/sdhci-uhs2.h
> +++ b/drivers/mmc/host/sdhci-uhs2.h
> @@ -178,5 +178,6 @@ void sdhci_uhs2_dump_regs(struct sdhci_host *host);
> bool sdhci_uhs2_mode(struct sdhci_host *host);
> void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
> 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 99633a3ef549..49bbdc155b2b 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -47,8 +47,6 @@
> 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)
> @@ -1877,6 +1875,9 @@ 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_SD_UHS2:
> + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2);
> + break;
> default:
> pr_warn("%s: Invalid UHS-I mode selected\n",
> mmc_hostname(host->mmc));
> @@ -2325,24 +2326,9 @@ static bool sdhci_presetable_values_change(struct sdhci_host *host, struct mmc_i
> (sdhci_preset_needed(host, ios->timing) || host->drv_type != ios->drv_type);
> }
>
> -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);
> - bool reinit_uhs = host->reinit_uhs;
> - bool turning_on_clk = false;
> - u8 ctrl;
> -
> - host->reinit_uhs = false;
> -
> - 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.
> @@ -2359,8 +2345,6 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> sdhci_enable_preset_value(host, false);
>
> if (!ios->clock || ios->clock != host->clock) {
> - turning_on_clk = ios->clock && !host->clock;
> -
> host->ops->set_clock(host, ios->clock);
> host->clock = ios->clock;
>
> @@ -2381,6 +2365,32 @@ 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);
> + bool reinit_uhs = host->reinit_uhs;
> + bool turning_on_clk = false;
> + u8 ctrl;
> +
> + host->reinit_uhs = false;
> +
> + 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 (!ios->clock || ios->clock != host->clock)
> + turning_on_clk = ios->clock && !host->clock;
>
> if (host->ops->platform_send_init_74_clocks)
> host->ops->platform_send_init_74_clocks(host, ios->power_mode);
> @@ -2959,7 +2969,7 @@ 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)
> @@ -2987,6 +2997,7 @@ 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 df7fa0c0ebf8..c2f989dc2361 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -850,6 +850,8 @@ 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);
Hi, Adrian
On Fri, Jan 6, 2023 at 5:28 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> On 13/12/22 11:00, Victor Shih 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>
> > Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
> > ---
> > drivers/mmc/host/sdhci-uhs2.c | 96 +++++++++++++++++++++++++++++++++++
> > drivers/mmc/host/sdhci-uhs2.h | 1 +
> > drivers/mmc/host/sdhci.c | 53 +++++++++++--------
> > drivers/mmc/host/sdhci.h | 2 +
> > 4 files changed, 131 insertions(+), 21 deletions(-)
> >
> > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> > index 00b1b69b49ea..3d52d35a91a5 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.c
> > +++ b/drivers/mmc/host/sdhci-uhs2.c
> > @@ -213,6 +213,68 @@ 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_INT_STATUS_ENABLE);
> > + ier &= ~clear;
> > + ier |= set;
> > + sdhci_writel(host, ier, SDHCI_UHS2_INT_STATUS_ENABLE);
> > + sdhci_writel(host, ier, SDHCI_UHS2_INT_SIGNAL_ENABLE);
> > +}
> > +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;
> > +
> > + /* UHS2 Timeout Control */
> > + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
> > +
> > + /* change to use calculate value */
> > + cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
> > +
> > + sdhci_uhs2_clear_set_irqs(host,
> > + SDHCI_UHS2_INT_CMD_TIMEOUT |
> > + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT,
> > + 0);
> > + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
> > + sdhci_uhs2_clear_set_irqs(host, 0,
> > + SDHCI_UHS2_INT_CMD_TIMEOUT |
> > + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT);
> > +
> > + /* UHS2 timing */
>
> Please extend comment to include:
>
> Note, UHS2 timing is disabled when powering off
>
> > + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> > + if (ios->timing == MMC_TIMING_SD_UHS2)
> > + ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
> > + else
> > + ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
> > + 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_uhs2_set_power(host, ios->power_mode, ios->vdd);
>
> sdhci_set_ios_common() already set the power. Are both needed?
>
> > + udelay(100);
>
> Please add a comment for why this delay is here.
>
> > +
> > + host->timing = ios->timing;
>
> Please move this up to where the timing change is.
>
The ios->timing was changed in sd_uhs2_power_up function and not
modified in this function(__sdhci_uhs2_set_ios), therefore would you
want me to move this to the sd_uhs2_power_up function?
As I know the ios->timing is used in sdhci_set_clock function, setting
the host->timing before call the sdhci_set_clock function ensures that
the host->timing used in sdhci_set_clock function is the most recent
value. What do you think about this?
> > + sdhci_set_clock(host, host->clock);
> > +}
> > +
> > /*****************************************************************************\
> > * *
> > * MMC callbacks *
> > @@ -234,6 +296,39 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc,
> > return sdhci_start_signal_voltage_switch(mmc, ios);
> > }
> >
> > +int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>
> Should be static
>
> > +{
> > + struct sdhci_host *host = mmc_priv(mmc);
> > +
> > + if (!(host->version >= SDHCI_SPEC_400) ||
> > + !(host->mmc->flags & MMC_UHS2_SUPPORT &&
> > + host->mmc->caps2 & MMC_CAP2_SD_UHS2)) {
>
> This can be just:
>
> if (!sdhci_uhs2_mode(host)) {
>
> Not sure if this is actually possible?
>
> > + sdhci_set_ios(mmc, ios);
> > + return 0;
> > + }
> > +
> > + if (ios->power_mode == MMC_POWER_UNDEFINED)
> > + return 0;
> > +
> > + 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);
>
> This can be just:
>
> if (ios->power_mode == MMC_POWER_OFF) {
> mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
> mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0);
> }
>
> > + return -1;
> > + }
> > +
> > + host->timing = ios->timing;
>
> __sdhci_uhs2_set_ios() does this so it is not needed here.
>
> > +
> > + sdhci_set_ios_common(mmc, ios);
> > +
> > + __sdhci_uhs2_set_ios(mmc, ios);
> > +
> > + return 0;
> > +}
> > +
> > /*****************************************************************************\
> > * *
> > * Driver init/exit *
> > @@ -244,6 +339,7 @@ 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;
> >
> > return 0;
> > }
> > diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
> > index a58ef19c08aa..184fee80253c 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.h
> > +++ b/drivers/mmc/host/sdhci-uhs2.h
> > @@ -178,5 +178,6 @@ void sdhci_uhs2_dump_regs(struct sdhci_host *host);
> > bool sdhci_uhs2_mode(struct sdhci_host *host);
> > void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
> > 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 99633a3ef549..49bbdc155b2b 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -47,8 +47,6 @@
> > 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)
> > @@ -1877,6 +1875,9 @@ 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_SD_UHS2:
> > + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2);
> > + break;
> > default:
> > pr_warn("%s: Invalid UHS-I mode selected\n",
> > mmc_hostname(host->mmc));
> > @@ -2325,24 +2326,9 @@ static bool sdhci_presetable_values_change(struct sdhci_host *host, struct mmc_i
> > (sdhci_preset_needed(host, ios->timing) || host->drv_type != ios->drv_type);
> > }
> >
> > -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);
> > - bool reinit_uhs = host->reinit_uhs;
> > - bool turning_on_clk = false;
> > - u8 ctrl;
> > -
> > - host->reinit_uhs = false;
> > -
> > - 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.
> > @@ -2359,8 +2345,6 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> > sdhci_enable_preset_value(host, false);
> >
> > if (!ios->clock || ios->clock != host->clock) {
> > - turning_on_clk = ios->clock && !host->clock;
> > -
> > host->ops->set_clock(host, ios->clock);
> > host->clock = ios->clock;
> >
> > @@ -2381,6 +2365,32 @@ 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);
> > + bool reinit_uhs = host->reinit_uhs;
> > + bool turning_on_clk = false;
> > + u8 ctrl;
> > +
> > + host->reinit_uhs = false;
> > +
> > + 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 (!ios->clock || ios->clock != host->clock)
> > + turning_on_clk = ios->clock && !host->clock;
> >
> > if (host->ops->platform_send_init_74_clocks)
> > host->ops->platform_send_init_74_clocks(host, ios->power_mode);
> > @@ -2959,7 +2969,7 @@ 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)
> > @@ -2987,6 +2997,7 @@ 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 df7fa0c0ebf8..c2f989dc2361 100644
> > --- a/drivers/mmc/host/sdhci.h
> > +++ b/drivers/mmc/host/sdhci.h
> > @@ -850,6 +850,8 @@ 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);
>
Thanks, Victor Shih
On 26/01/23 12:58, Victor Shih wrote:
> Hi, Adrian
>
> On Fri, Jan 6, 2023 at 5:28 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
>>
>> On 13/12/22 11:00, Victor Shih 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>
>>> Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
>>> ---
>>> drivers/mmc/host/sdhci-uhs2.c | 96 +++++++++++++++++++++++++++++++++++
>>> drivers/mmc/host/sdhci-uhs2.h | 1 +
>>> drivers/mmc/host/sdhci.c | 53 +++++++++++--------
>>> drivers/mmc/host/sdhci.h | 2 +
>>> 4 files changed, 131 insertions(+), 21 deletions(-)
>>>
>>> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
>>> index 00b1b69b49ea..3d52d35a91a5 100644
>>> --- a/drivers/mmc/host/sdhci-uhs2.c
>>> +++ b/drivers/mmc/host/sdhci-uhs2.c
>>> @@ -213,6 +213,68 @@ 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_INT_STATUS_ENABLE);
>>> + ier &= ~clear;
>>> + ier |= set;
>>> + sdhci_writel(host, ier, SDHCI_UHS2_INT_STATUS_ENABLE);
>>> + sdhci_writel(host, ier, SDHCI_UHS2_INT_SIGNAL_ENABLE);
>>> +}
>>> +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;
>>> +
>>> + /* UHS2 Timeout Control */
>>> + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
>>> +
>>> + /* change to use calculate value */
>>> + cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
>>> +
>>> + sdhci_uhs2_clear_set_irqs(host,
>>> + SDHCI_UHS2_INT_CMD_TIMEOUT |
>>> + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT,
>>> + 0);
>>> + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
>>> + sdhci_uhs2_clear_set_irqs(host, 0,
>>> + SDHCI_UHS2_INT_CMD_TIMEOUT |
>>> + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT);
>>> +
>>> + /* UHS2 timing */
>>
>> Please extend comment to include:
>>
>> Note, UHS2 timing is disabled when powering off
>>
>>> + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>>> + if (ios->timing == MMC_TIMING_SD_UHS2)
>>> + ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
>>> + else
>>> + ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
>>> + 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_uhs2_set_power(host, ios->power_mode, ios->vdd);
>>
>> sdhci_set_ios_common() already set the power. Are both needed?
>>
>>> + udelay(100);
>>
>> Please add a comment for why this delay is here.
>>
>>> +
>>> + host->timing = ios->timing;
>>
>> Please move this up to where the timing change is.
>>
>
> The ios->timing was changed in sd_uhs2_power_up function and not
> modified in this function(__sdhci_uhs2_set_ios), therefore would you
> want me to move this to the sd_uhs2_power_up function?
No
>
> As I know the ios->timing is used in sdhci_set_clock function, setting
> the host->timing before call the sdhci_set_clock function ensures that
> the host->timing used in sdhci_set_clock function is the most recent
> value. What do you think about this?
I just meant move it below the timing chunk i.e.
/* UHS2 timing. Note, UHS2 timing is disabled when powering off */
ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
if (ios->timing == MMC_TIMING_SD_UHS2)
ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
else
ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
host->timing = ios->timing;
>
>>> + sdhci_set_clock(host, host->clock);
>>> +}
>>> +
>>> /*****************************************************************************\
>>> * *
>>> * MMC callbacks *
>>> @@ -234,6 +296,39 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc,
>>> return sdhci_start_signal_voltage_switch(mmc, ios);
>>> }
>>>
>>> +int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>>
>> Should be static
>>
>>> +{
>>> + struct sdhci_host *host = mmc_priv(mmc);
>>> +
>>> + if (!(host->version >= SDHCI_SPEC_400) ||
>>> + !(host->mmc->flags & MMC_UHS2_SUPPORT &&
>>> + host->mmc->caps2 & MMC_CAP2_SD_UHS2)) {
>>
>> This can be just:
>>
>> if (!sdhci_uhs2_mode(host)) {
>>
>> Not sure if this is actually possible?
>>
>>> + sdhci_set_ios(mmc, ios);
>>> + return 0;
>>> + }
>>> +
>>> + if (ios->power_mode == MMC_POWER_UNDEFINED)
>>> + return 0;
>>> +
>>> + 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);
>>
>> This can be just:
>>
>> if (ios->power_mode == MMC_POWER_OFF) {
>> mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
>> mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0);
>> }
>>
>>> + return -1;
>>> + }
>>> +
>>> + host->timing = ios->timing;
>>
>> __sdhci_uhs2_set_ios() does this so it is not needed here.
>>
>>> +
>>> + sdhci_set_ios_common(mmc, ios);
>>> +
>>> + __sdhci_uhs2_set_ios(mmc, ios);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> /*****************************************************************************\
>>> * *
>>> * Driver init/exit *
>>> @@ -244,6 +339,7 @@ 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;
>>>
>>> return 0;
>>> }
>>> diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
>>> index a58ef19c08aa..184fee80253c 100644
>>> --- a/drivers/mmc/host/sdhci-uhs2.h
>>> +++ b/drivers/mmc/host/sdhci-uhs2.h
>>> @@ -178,5 +178,6 @@ void sdhci_uhs2_dump_regs(struct sdhci_host *host);
>>> bool sdhci_uhs2_mode(struct sdhci_host *host);
>>> void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
>>> 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 99633a3ef549..49bbdc155b2b 100644
>>> --- a/drivers/mmc/host/sdhci.c
>>> +++ b/drivers/mmc/host/sdhci.c
>>> @@ -47,8 +47,6 @@
>>> 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)
>>> @@ -1877,6 +1875,9 @@ 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_SD_UHS2:
>>> + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2);
>>> + break;
>>> default:
>>> pr_warn("%s: Invalid UHS-I mode selected\n",
>>> mmc_hostname(host->mmc));
>>> @@ -2325,24 +2326,9 @@ static bool sdhci_presetable_values_change(struct sdhci_host *host, struct mmc_i
>>> (sdhci_preset_needed(host, ios->timing) || host->drv_type != ios->drv_type);
>>> }
>>>
>>> -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);
>>> - bool reinit_uhs = host->reinit_uhs;
>>> - bool turning_on_clk = false;
>>> - u8 ctrl;
>>> -
>>> - host->reinit_uhs = false;
>>> -
>>> - 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.
>>> @@ -2359,8 +2345,6 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>>> sdhci_enable_preset_value(host, false);
>>>
>>> if (!ios->clock || ios->clock != host->clock) {
>>> - turning_on_clk = ios->clock && !host->clock;
>>> -
>>> host->ops->set_clock(host, ios->clock);
>>> host->clock = ios->clock;
>>>
>>> @@ -2381,6 +2365,32 @@ 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);
>>> + bool reinit_uhs = host->reinit_uhs;
>>> + bool turning_on_clk = false;
>>> + u8 ctrl;
>>> +
>>> + host->reinit_uhs = false;
>>> +
>>> + 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 (!ios->clock || ios->clock != host->clock)
>>> + turning_on_clk = ios->clock && !host->clock;
>>>
>>> if (host->ops->platform_send_init_74_clocks)
>>> host->ops->platform_send_init_74_clocks(host, ios->power_mode);
>>> @@ -2959,7 +2969,7 @@ 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)
>>> @@ -2987,6 +2997,7 @@ 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 df7fa0c0ebf8..c2f989dc2361 100644
>>> --- a/drivers/mmc/host/sdhci.h
>>> +++ b/drivers/mmc/host/sdhci.h
>>> @@ -850,6 +850,8 @@ 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);
>>
>
> Thanks, Victor Shih
Hi, Adrian
On Mon, Jan 30, 2023 at 9:16 PM Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> On 26/01/23 12:58, Victor Shih wrote:
> > Hi, Adrian
> >
> > On Fri, Jan 6, 2023 at 5:28 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
> >>
> >> On 13/12/22 11:00, Victor Shih 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>
> >>> Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
> >>> ---
> >>> drivers/mmc/host/sdhci-uhs2.c | 96 +++++++++++++++++++++++++++++++++++
> >>> drivers/mmc/host/sdhci-uhs2.h | 1 +
> >>> drivers/mmc/host/sdhci.c | 53 +++++++++++--------
> >>> drivers/mmc/host/sdhci.h | 2 +
> >>> 4 files changed, 131 insertions(+), 21 deletions(-)
> >>>
> >>> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> >>> index 00b1b69b49ea..3d52d35a91a5 100644
> >>> --- a/drivers/mmc/host/sdhci-uhs2.c
> >>> +++ b/drivers/mmc/host/sdhci-uhs2.c
> >>> @@ -213,6 +213,68 @@ 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_INT_STATUS_ENABLE);
> >>> + ier &= ~clear;
> >>> + ier |= set;
> >>> + sdhci_writel(host, ier, SDHCI_UHS2_INT_STATUS_ENABLE);
> >>> + sdhci_writel(host, ier, SDHCI_UHS2_INT_SIGNAL_ENABLE);
> >>> +}
> >>> +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;
> >>> +
> >>> + /* UHS2 Timeout Control */
> >>> + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
> >>> +
> >>> + /* change to use calculate value */
> >>> + cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
> >>> +
> >>> + sdhci_uhs2_clear_set_irqs(host,
> >>> + SDHCI_UHS2_INT_CMD_TIMEOUT |
> >>> + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT,
> >>> + 0);
> >>> + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
> >>> + sdhci_uhs2_clear_set_irqs(host, 0,
> >>> + SDHCI_UHS2_INT_CMD_TIMEOUT |
> >>> + SDHCI_UHS2_INT_DEADLOCK_TIMEOUT);
> >>> +
> >>> + /* UHS2 timing */
> >>
> >> Please extend comment to include:
> >>
> >> Note, UHS2 timing is disabled when powering off
> >>
I will update it in V7 version.
> >>> + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> >>> + if (ios->timing == MMC_TIMING_SD_UHS2)
> >>> + ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
> >>> + else
> >>> + ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
> >>> + 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_uhs2_set_power(host, ios->power_mode, ios->vdd);
> >>
> >> sdhci_set_ios_common() already set the power. Are both needed?
> >>
I will move the set_power function in the sdhci_set_ios_common to the
sdhci_set_ios and update it in V7 version.
> >>> + udelay(100);
> >>
> >> Please add a comment for why this delay is here.
> >>
I will drop it and update in V7 version.
> >>> +
> >>> + host->timing = ios->timing;
> >>
> >> Please move this up to where the timing change is.
> >>
> >
> > The ios->timing was changed in sd_uhs2_power_up function and not
> > modified in this function(__sdhci_uhs2_set_ios), therefore would you
> > want me to move this to the sd_uhs2_power_up function?
>
> No
>
> >
> > As I know the ios->timing is used in sdhci_set_clock function, setting
> > the host->timing before call the sdhci_set_clock function ensures that
> > the host->timing used in sdhci_set_clock function is the most recent
> > value. What do you think about this?
>
> I just meant move it below the timing chunk i.e.
>
> /* UHS2 timing. Note, UHS2 timing is disabled when powering off */
> ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> if (ios->timing == MMC_TIMING_SD_UHS2)
> ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
> else
> ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
> sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
> host->timing = ios->timing;
>
I will update it in V7 version.
> >
> >>> + sdhci_set_clock(host, host->clock);
> >>> +}
> >>> +
> >>> /*****************************************************************************\
> >>> * *
> >>> * MMC callbacks *
> >>> @@ -234,6 +296,39 @@ static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc,
> >>> return sdhci_start_signal_voltage_switch(mmc, ios);
> >>> }
> >>>
> >>> +int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> >>
> >> Should be static
> >>
I will update it in V7 version.
> >>> +{
> >>> + struct sdhci_host *host = mmc_priv(mmc);
> >>> +
> >>> + if (!(host->version >= SDHCI_SPEC_400) ||
> >>> + !(host->mmc->flags & MMC_UHS2_SUPPORT &&
> >>> + host->mmc->caps2 & MMC_CAP2_SD_UHS2)) {
> >>
> >> This can be just:
> >>
> >> if (!sdhci_uhs2_mode(host)) {
> >>
> >> Not sure if this is actually possible?
> >>
I will update it in V7 version.
> >>> + sdhci_set_ios(mmc, ios);
> >>> + return 0;
> >>> + }
> >>> +
> >>> + if (ios->power_mode == MMC_POWER_UNDEFINED)
> >>> + return 0;
> >>> +
> >>> + 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);
> >>
> >> This can be just:
> >>
> >> if (ios->power_mode == MMC_POWER_OFF) {
> >> mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
> >> mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0);
> >> }
> >>
I will update it in V7 version.
> >>> + return -1;
> >>> + }
> >>> +
> >>> + host->timing = ios->timing;
> >>
> >> __sdhci_uhs2_set_ios() does this so it is not needed here.
> >>
I will update it in V7 version.
> >>> +
> >>> + sdhci_set_ios_common(mmc, ios);
> >>> +
> >>> + __sdhci_uhs2_set_ios(mmc, ios);
> >>> +
> >>> + return 0;
> >>> +}
> >>> +
> >>> /*****************************************************************************\
> >>> * *
> >>> * Driver init/exit *
> >>> @@ -244,6 +339,7 @@ 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;
> >>>
> >>> return 0;
> >>> }
> >>> diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
> >>> index a58ef19c08aa..184fee80253c 100644
> >>> --- a/drivers/mmc/host/sdhci-uhs2.h
> >>> +++ b/drivers/mmc/host/sdhci-uhs2.h
> >>> @@ -178,5 +178,6 @@ void sdhci_uhs2_dump_regs(struct sdhci_host *host);
> >>> bool sdhci_uhs2_mode(struct sdhci_host *host);
> >>> void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
> >>> 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 99633a3ef549..49bbdc155b2b 100644
> >>> --- a/drivers/mmc/host/sdhci.c
> >>> +++ b/drivers/mmc/host/sdhci.c
> >>> @@ -47,8 +47,6 @@
> >>> 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)
> >>> @@ -1877,6 +1875,9 @@ 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_SD_UHS2:
> >>> + preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2);
> >>> + break;
> >>> default:
> >>> pr_warn("%s: Invalid UHS-I mode selected\n",
> >>> mmc_hostname(host->mmc));
> >>> @@ -2325,24 +2326,9 @@ static bool sdhci_presetable_values_change(struct sdhci_host *host, struct mmc_i
> >>> (sdhci_preset_needed(host, ios->timing) || host->drv_type != ios->drv_type);
> >>> }
> >>>
> >>> -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);
> >>> - bool reinit_uhs = host->reinit_uhs;
> >>> - bool turning_on_clk = false;
> >>> - u8 ctrl;
> >>> -
> >>> - host->reinit_uhs = false;
> >>> -
> >>> - 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.
> >>> @@ -2359,8 +2345,6 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> >>> sdhci_enable_preset_value(host, false);
> >>>
> >>> if (!ios->clock || ios->clock != host->clock) {
> >>> - turning_on_clk = ios->clock && !host->clock;
> >>> -
> >>> host->ops->set_clock(host, ios->clock);
> >>> host->clock = ios->clock;
> >>>
> >>> @@ -2381,6 +2365,32 @@ 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);
> >>> + bool reinit_uhs = host->reinit_uhs;
> >>> + bool turning_on_clk = false;
> >>> + u8 ctrl;
> >>> +
> >>> + host->reinit_uhs = false;
> >>> +
> >>> + 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 (!ios->clock || ios->clock != host->clock)
> >>> + turning_on_clk = ios->clock && !host->clock;
> >>>
> >>> if (host->ops->platform_send_init_74_clocks)
> >>> host->ops->platform_send_init_74_clocks(host, ios->power_mode);
> >>> @@ -2959,7 +2969,7 @@ 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)
> >>> @@ -2987,6 +2997,7 @@ 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 df7fa0c0ebf8..c2f989dc2361 100644
> >>> --- a/drivers/mmc/host/sdhci.h
> >>> +++ b/drivers/mmc/host/sdhci.h
> >>> @@ -850,6 +850,8 @@ 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);
> >>
> >
> > Thanks, Victor Shih
>
Thanks, Victor Shih
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