| Message ID | 20230818100217.12725-12-victorshihgli@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support UHS-II for GL9755 | expand |
On 18/08/23 13:02, Victor Shih wrote: > From: Victor Shih <victor.shih@genesyslogic.com.tw> > > This is a UHS-II version of sdhci's set_power operation. 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> Acked-by: Adrian Hunter <adrian.hunter@intel.com> > --- > > 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 + include/linux/mmc/host.h | 1 + 4 files changed, 83 > insertions(+), 28 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-uhs2.c > b/drivers/mmc/host/sdhci-uhs2.c index dfc80a7f1bad..fc37a34629c2 > 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ > b/drivers/mmc/host/sdhci-uhs2.c @@ -57,6 +57,13 @@ > 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->flags & MMC_UHS2_SUPPORT; @@ -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_opt_regulator_set_ocr(mmc, > mmc->supply.vmmc2, 0); + } else { + mmc_opt_regulator_set_ocr(mmc, > mmc->supply.vmmc, vdd); + /* support 1.8v only for now */ + > mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, > fls(MMC_VDD_165_195) - 1); + + /* 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 753b251179f2..eca54a16e7fc 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 43ad3f4b7672..f3bd558b337f 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/include/linux/mmc/host.h b/include/linux/mmc/host.h > index e38c45392079..1eba64228725 100644 --- > a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -357,6 > +357,7 @@ struct mmc_pwrseq; > > struct mmc_supply { struct regulator *vmmc; /* Card power supply */ > + struct regulator *vmmc2; /* UHS2 VDD2 power supply */ struct > regulator *vqmmc; /* Optional Vccq supply */ struct regulator > *vqmmc2; /* Optional supply for phy */ };
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index dfc80a7f1bad..fc37a34629c2 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -57,6 +57,13 @@ 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->flags & MMC_UHS2_SUPPORT; @@ -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_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); + } else { + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + /* support 1.8v only for now */ + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, fls(MMC_VDD_165_195) - 1); + + /* 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 753b251179f2..eca54a16e7fc 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 43ad3f4b7672..f3bd558b337f 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/include/linux/mmc/host.h b/include/linux/mmc/host.h index e38c45392079..1eba64228725 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -357,6 +357,7 @@ struct mmc_pwrseq; struct mmc_supply { struct regulator *vmmc; /* Card power supply */ + struct regulator *vmmc2; /* UHS2 VDD2 power supply */ struct regulator *vqmmc; /* Optional Vccq supply */ struct regulator *vqmmc2; /* Optional supply for phy */ };