| Message ID | 20231117113149.9069-13-victorshihgli@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support UHS-II for GL9755 | expand |
On 17/11/23 13:31, Victor Shih wrote: > From: Victor Shih <victor.shih@genesyslogic.com.tw> > > This is a UHS-II version of sdhci's set_power operation. > Use sdhci_uhs2_set_power() to set VDD2 for support UHS2 interface. > VDD2, as well as VDD, is handled here. > > Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> > Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw> > --- > > Updates in V13: > - Drop use vmmc2. > - Modify comment message. > > Updates in V10: > - Move some definitions of PatchV9[05/23] to PatchV10[11/23]. > > Updates in V9: > - Modify annotations in sdhci_get_vdd_value(). > > Updates in V8: > - Adjust the position of matching brackets. > - Add the initial value of the pwr in sdhci_uhs2_set_power(). > > Updates in V7: > - Add clear the power reg before setting a new value > in sdhci_uhs2_set_power(). > - Add MMC_VDD_34_35 case and MMC_VDD_35_36 case in sdhci_get_vdd_value(). > - Drop pwr variable in sdhci_get_vdd_value(). > > Updates in V6: > - Add mmc_opt_regulator_set_ocr(). > - Remove unnecessary functions. > > --- > drivers/mmc/host/sdhci-uhs2.c | 48 +++++++++++++++++++++++++++ > drivers/mmc/host/sdhci.c | 61 +++++++++++++++++++---------------- > drivers/mmc/host/sdhci.h | 1 + > 3 files changed, 82 insertions(+), 28 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c > index 066549526060..7d5070f58d00 100644 > --- a/drivers/mmc/host/sdhci-uhs2.c > +++ b/drivers/mmc/host/sdhci-uhs2.c > @@ -59,6 +59,13 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs); > * * > \*****************************************************************************/ > > +static inline int mmc_opt_regulator_set_ocr(struct mmc_host *mmc, > + struct regulator *supply, > + unsigned short vdd_bit) > +{ > + return IS_ERR_OR_NULL(supply) ? 0 : mmc_regulator_set_ocr(mmc, supply, vdd_bit); > +} > + > bool sdhci_uhs2_mode(struct sdhci_host *host) > { > return host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_A || > @@ -94,6 +101,47 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask) > } > EXPORT_SYMBOL_GPL(sdhci_uhs2_reset); > > +static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd) > +{ > + struct mmc_host *mmc = host->mmc; > + u8 pwr = 0; > + > + if (mode != MMC_POWER_OFF) { > + pwr = sdhci_get_vdd_value(vdd); > + if (!pwr) > + WARN(1, "%s: Invalid vdd %#x\n", > + mmc_hostname(host->mmc), vdd); > + pwr |= SDHCI_VDD2_POWER_180; > + } > + > + if (host->pwr == pwr) > + return; > + host->pwr = pwr; > + > + if (pwr == 0) { > + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); > + > + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); mmc_regulator_set_vqmmc2() only sets the voltage, it doesn't disable the regulator. > + } else { > + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); > + /* support 1.8v only for now */ > + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); > + > + /* Clear the power reg before setting a new value */ > + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); > + > + /* vdd first */ > + pwr |= SDHCI_POWER_ON; > + sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL); > + mdelay(5); > + > + pwr |= SDHCI_VDD2_POWER_ON; > + sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); > + mdelay(5); > + } > +} > + > /*****************************************************************************\ > * * > * Driver init/exit * > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index 27ea5b875c29..4d50cac7717d 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -23,7 +23,7 @@ > #include <linux/regulator/consumer.h> > #include <linux/pm_runtime.h> > #include <linux/of.h> > - > +#include <linux/bug.h> > #include <linux/leds.h> > > #include <linux/mmc/mmc.h> > @@ -2061,41 +2061,46 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, > sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); > } > > +unsigned short sdhci_get_vdd_value(unsigned short vdd) > +{ > + switch (1 << vdd) { > + case MMC_VDD_165_195: > + /* > + * Without a regulator, SDHCI does not support 2.0v > + * so we only get here if the driver deliberately > + * added the 2.0v range to ocr_avail. Map it to 1.8v > + * for the purpose of turning on the power. > + */ > + case MMC_VDD_20_21: > + return SDHCI_POWER_180; > + case MMC_VDD_29_30: > + case MMC_VDD_30_31: > + return SDHCI_POWER_300; > + case MMC_VDD_32_33: > + case MMC_VDD_33_34: > + /* > + * 3.4V ~ 3.6V are valid only for those platforms where it's > + * known that the voltage range is supported by hardware. > + */ > + case MMC_VDD_34_35: > + case MMC_VDD_35_36: > + return SDHCI_POWER_330; > + default: > + return 0; > + } > +} > +EXPORT_SYMBOL_GPL(sdhci_get_vdd_value); > + > void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, > unsigned short vdd) > { > u8 pwr = 0; > > if (mode != MMC_POWER_OFF) { > - switch (1 << vdd) { > - case MMC_VDD_165_195: > - /* > - * Without a regulator, SDHCI does not support 2.0v > - * so we only get here if the driver deliberately > - * added the 2.0v range to ocr_avail. Map it to 1.8v > - * for the purpose of turning on the power. > - */ > - case MMC_VDD_20_21: > - pwr = SDHCI_POWER_180; > - break; > - case MMC_VDD_29_30: > - case MMC_VDD_30_31: > - pwr = SDHCI_POWER_300; > - break; > - case MMC_VDD_32_33: > - case MMC_VDD_33_34: > - /* > - * 3.4 ~ 3.6V are valid only for those platforms where it's > - * known that the voltage range is supported by hardware. > - */ > - case MMC_VDD_34_35: > - case MMC_VDD_35_36: > - pwr = SDHCI_POWER_330; > - break; > - default: > + pwr = sdhci_get_vdd_value(vdd); > + if (!pwr) { > WARN(1, "%s: Invalid vdd %#x\n", > mmc_hostname(host->mmc), vdd); > - break; > } > } > > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > index 782c399fae15..cdb418d97c4d 100644 > --- a/drivers/mmc/host/sdhci.h > +++ b/drivers/mmc/host/sdhci.h > @@ -837,6 +837,7 @@ void sdhci_set_power(struct sdhci_host *host, unsigned char mode, > void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, > unsigned char mode, > unsigned short vdd); > +unsigned short sdhci_get_vdd_value(unsigned short vdd); > void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, > unsigned short vdd); > int sdhci_get_cd_nogpio(struct mmc_host *mmc);
On Tue, Nov 28, 2023 at 5:12 PM Adrian Hunter <adrian.hunter@intel.com> wrote: > > On 17/11/23 13:31, Victor Shih wrote: > > From: Victor Shih <victor.shih@genesyslogic.com.tw> > > > > This is a UHS-II version of sdhci's set_power operation. > > Use sdhci_uhs2_set_power() to set VDD2 for support UHS2 interface. > > VDD2, as well as VDD, is handled here. > > > > Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw> > > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> > > Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw> > > --- > > > > Updates in V13: > > - Drop use vmmc2. > > - Modify comment message. > > > > Updates in V10: > > - Move some definitions of PatchV9[05/23] to PatchV10[11/23]. > > > > Updates in V9: > > - Modify annotations in sdhci_get_vdd_value(). > > > > Updates in V8: > > - Adjust the position of matching brackets. > > - Add the initial value of the pwr in sdhci_uhs2_set_power(). > > > > Updates in V7: > > - Add clear the power reg before setting a new value > > in sdhci_uhs2_set_power(). > > - Add MMC_VDD_34_35 case and MMC_VDD_35_36 case in sdhci_get_vdd_value(). > > - Drop pwr variable in sdhci_get_vdd_value(). > > > > Updates in V6: > > - Add mmc_opt_regulator_set_ocr(). > > - Remove unnecessary functions. > > > > --- > > drivers/mmc/host/sdhci-uhs2.c | 48 +++++++++++++++++++++++++++ > > drivers/mmc/host/sdhci.c | 61 +++++++++++++++++++---------------- > > drivers/mmc/host/sdhci.h | 1 + > > 3 files changed, 82 insertions(+), 28 deletions(-) > > > > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c > > index 066549526060..7d5070f58d00 100644 > > --- a/drivers/mmc/host/sdhci-uhs2.c > > +++ b/drivers/mmc/host/sdhci-uhs2.c > > @@ -59,6 +59,13 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs); > > * * > > \*****************************************************************************/ > > > > +static inline int mmc_opt_regulator_set_ocr(struct mmc_host *mmc, > > + struct regulator *supply, > > + unsigned short vdd_bit) > > +{ > > + return IS_ERR_OR_NULL(supply) ? 0 : mmc_regulator_set_ocr(mmc, supply, vdd_bit); > > +} > > + > > bool sdhci_uhs2_mode(struct sdhci_host *host) > > { > > return host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_A || > > @@ -94,6 +101,47 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask) > > } > > EXPORT_SYMBOL_GPL(sdhci_uhs2_reset); > > > > +static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd) > > +{ > > + struct mmc_host *mmc = host->mmc; > > + u8 pwr = 0; > > + > > + if (mode != MMC_POWER_OFF) { > > + pwr = sdhci_get_vdd_value(vdd); > > + if (!pwr) > > + WARN(1, "%s: Invalid vdd %#x\n", > > + mmc_hostname(host->mmc), vdd); > > + pwr |= SDHCI_VDD2_POWER_180; > > + } > > + > > + if (host->pwr == pwr) > > + return; > > + host->pwr = pwr; > > + > > + if (pwr == 0) { > > + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); > > + > > + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); > > + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); > > mmc_regulator_set_vqmmc2() only sets the voltage, it doesn't > disable the regulator. > Hi, Ulf Would you have any idea about using the mmc_regulator_set_vqmmc2() to disable the regulator? Thanks, Victor Shih > > + } else { > > + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); > > + /* support 1.8v only for now */ > > + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); > > + > > + /* Clear the power reg before setting a new value */ > > + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); > > + > > + /* vdd first */ > > + pwr |= SDHCI_POWER_ON; > > + sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL); > > + mdelay(5); > > + > > + pwr |= SDHCI_VDD2_POWER_ON; > > + sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); > > + mdelay(5); > > + } > > +} > > + > > /*****************************************************************************\ > > * * > > * Driver init/exit * > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > > index 27ea5b875c29..4d50cac7717d 100644 > > --- a/drivers/mmc/host/sdhci.c > > +++ b/drivers/mmc/host/sdhci.c > > @@ -23,7 +23,7 @@ > > #include <linux/regulator/consumer.h> > > #include <linux/pm_runtime.h> > > #include <linux/of.h> > > - > > +#include <linux/bug.h> > > #include <linux/leds.h> > > > > #include <linux/mmc/mmc.h> > > @@ -2061,41 +2061,46 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, > > sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); > > } > > > > +unsigned short sdhci_get_vdd_value(unsigned short vdd) > > +{ > > + switch (1 << vdd) { > > + case MMC_VDD_165_195: > > + /* > > + * Without a regulator, SDHCI does not support 2.0v > > + * so we only get here if the driver deliberately > > + * added the 2.0v range to ocr_avail. Map it to 1.8v > > + * for the purpose of turning on the power. > > + */ > > + case MMC_VDD_20_21: > > + return SDHCI_POWER_180; > > + case MMC_VDD_29_30: > > + case MMC_VDD_30_31: > > + return SDHCI_POWER_300; > > + case MMC_VDD_32_33: > > + case MMC_VDD_33_34: > > + /* > > + * 3.4V ~ 3.6V are valid only for those platforms where it's > > + * known that the voltage range is supported by hardware. > > + */ > > + case MMC_VDD_34_35: > > + case MMC_VDD_35_36: > > + return SDHCI_POWER_330; > > + default: > > + return 0; > > + } > > +} > > +EXPORT_SYMBOL_GPL(sdhci_get_vdd_value); > > + > > void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, > > unsigned short vdd) > > { > > u8 pwr = 0; > > > > if (mode != MMC_POWER_OFF) { > > - switch (1 << vdd) { > > - case MMC_VDD_165_195: > > - /* > > - * Without a regulator, SDHCI does not support 2.0v > > - * so we only get here if the driver deliberately > > - * added the 2.0v range to ocr_avail. Map it to 1.8v > > - * for the purpose of turning on the power. > > - */ > > - case MMC_VDD_20_21: > > - pwr = SDHCI_POWER_180; > > - break; > > - case MMC_VDD_29_30: > > - case MMC_VDD_30_31: > > - pwr = SDHCI_POWER_300; > > - break; > > - case MMC_VDD_32_33: > > - case MMC_VDD_33_34: > > - /* > > - * 3.4 ~ 3.6V are valid only for those platforms where it's > > - * known that the voltage range is supported by hardware. > > - */ > > - case MMC_VDD_34_35: > > - case MMC_VDD_35_36: > > - pwr = SDHCI_POWER_330; > > - break; > > - default: > > + pwr = sdhci_get_vdd_value(vdd); > > + if (!pwr) { > > WARN(1, "%s: Invalid vdd %#x\n", > > mmc_hostname(host->mmc), vdd); > > - break; > > } > > } > > > > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > > index 782c399fae15..cdb418d97c4d 100644 > > --- a/drivers/mmc/host/sdhci.h > > +++ b/drivers/mmc/host/sdhci.h > > @@ -837,6 +837,7 @@ void sdhci_set_power(struct sdhci_host *host, unsigned char mode, > > void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, > > unsigned char mode, > > unsigned short vdd); > > +unsigned short sdhci_get_vdd_value(unsigned short vdd); > > void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, > > unsigned short vdd); > > int sdhci_get_cd_nogpio(struct mmc_host *mmc); >
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index 066549526060..7d5070f58d00 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -59,6 +59,13 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs); * * \*****************************************************************************/ +static inline int mmc_opt_regulator_set_ocr(struct mmc_host *mmc, + struct regulator *supply, + unsigned short vdd_bit) +{ + return IS_ERR_OR_NULL(supply) ? 0 : mmc_regulator_set_ocr(mmc, supply, vdd_bit); +} + bool sdhci_uhs2_mode(struct sdhci_host *host) { return host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_A || @@ -94,6 +101,47 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask) } EXPORT_SYMBOL_GPL(sdhci_uhs2_reset); +static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd) +{ + struct mmc_host *mmc = host->mmc; + u8 pwr = 0; + + if (mode != MMC_POWER_OFF) { + pwr = sdhci_get_vdd_value(vdd); + if (!pwr) + WARN(1, "%s: Invalid vdd %#x\n", + mmc_hostname(host->mmc), vdd); + pwr |= SDHCI_VDD2_POWER_180; + } + + if (host->pwr == pwr) + return; + host->pwr = pwr; + + if (pwr == 0) { + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); + } else { + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + /* support 1.8v only for now */ + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); + + /* Clear the power reg before setting a new value */ + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + + /* vdd first */ + pwr |= SDHCI_POWER_ON; + sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL); + mdelay(5); + + pwr |= SDHCI_VDD2_POWER_ON; + sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); + mdelay(5); + } +} + /*****************************************************************************\ * * * Driver init/exit * diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 27ea5b875c29..4d50cac7717d 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -23,7 +23,7 @@ #include <linux/regulator/consumer.h> #include <linux/pm_runtime.h> #include <linux/of.h> - +#include <linux/bug.h> #include <linux/leds.h> #include <linux/mmc/mmc.h> @@ -2061,41 +2061,46 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); } +unsigned short sdhci_get_vdd_value(unsigned short vdd) +{ + switch (1 << vdd) { + case MMC_VDD_165_195: + /* + * Without a regulator, SDHCI does not support 2.0v + * so we only get here if the driver deliberately + * added the 2.0v range to ocr_avail. Map it to 1.8v + * for the purpose of turning on the power. + */ + case MMC_VDD_20_21: + return SDHCI_POWER_180; + case MMC_VDD_29_30: + case MMC_VDD_30_31: + return SDHCI_POWER_300; + case MMC_VDD_32_33: + case MMC_VDD_33_34: + /* + * 3.4V ~ 3.6V are valid only for those platforms where it's + * known that the voltage range is supported by hardware. + */ + case MMC_VDD_34_35: + case MMC_VDD_35_36: + return SDHCI_POWER_330; + default: + return 0; + } +} +EXPORT_SYMBOL_GPL(sdhci_get_vdd_value); + void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, unsigned short vdd) { u8 pwr = 0; if (mode != MMC_POWER_OFF) { - switch (1 << vdd) { - case MMC_VDD_165_195: - /* - * Without a regulator, SDHCI does not support 2.0v - * so we only get here if the driver deliberately - * added the 2.0v range to ocr_avail. Map it to 1.8v - * for the purpose of turning on the power. - */ - case MMC_VDD_20_21: - pwr = SDHCI_POWER_180; - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - pwr = SDHCI_POWER_300; - break; - case MMC_VDD_32_33: - case MMC_VDD_33_34: - /* - * 3.4 ~ 3.6V are valid only for those platforms where it's - * known that the voltage range is supported by hardware. - */ - case MMC_VDD_34_35: - case MMC_VDD_35_36: - pwr = SDHCI_POWER_330; - break; - default: + pwr = sdhci_get_vdd_value(vdd); + if (!pwr) { WARN(1, "%s: Invalid vdd %#x\n", mmc_hostname(host->mmc), vdd); - break; } } diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 782c399fae15..cdb418d97c4d 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -837,6 +837,7 @@ void sdhci_set_power(struct sdhci_host *host, unsigned char mode, void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, unsigned char mode, unsigned short vdd); +unsigned short sdhci_get_vdd_value(unsigned short vdd); void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, unsigned short vdd); int sdhci_get_cd_nogpio(struct mmc_host *mmc);