| Message ID | 20230119035136.21603-14-blarson@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Support AMD Pensando Elba SoC | expand |
On 19/01/23 05:51, Brad Larson wrote: > Add support for AMD Pensando Elba SoC which explicitly > controls byte-lane enables on writes. > > Select MMC_SDHCI_IO_ACCESSORS for MMC_SDHCI_CADENCE which > allows Elba SoC sdhci_elba_ops to overwrite the SDHCI > IO memory accessors. > > Signed-off-by: Brad Larson <blarson@amd.com> > --- > > Changes since v6: > - Previously patch 16/17 > > --- > drivers/mmc/host/Kconfig | 1 + > drivers/mmc/host/sdhci-cadence.c | 131 ++++++++++++++++++++++++++++--- > 2 files changed, 123 insertions(+), 9 deletions(-) > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index 5e19a961c34d..9e41115cc753 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -255,6 +255,7 @@ config MMC_SDHCI_CADENCE > tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller" > depends on MMC_SDHCI_PLTFM > depends on OF > + select MMC_SDHCI_IO_ACCESSORS > help > This selects the Cadence SD/SDIO/eMMC driver. > > diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c > index 708d4297f241..e92aa79a8be2 100644 > --- a/drivers/mmc/host/sdhci-cadence.c > +++ b/drivers/mmc/host/sdhci-cadence.c > @@ -66,6 +66,8 @@ struct sdhci_cdns_phy_param { > > struct sdhci_cdns_priv { > void __iomem *hrs_addr; > + void __iomem *ctl_addr; /* write control */ > + spinlock_t wrlock; /* write lock */ > bool enhanced_strobe; > void (*priv_writel)(struct sdhci_cdns_priv *priv, u32 val, void __iomem *reg); > unsigned int nr_phy_params; > @@ -77,6 +79,11 @@ struct sdhci_cdns_phy_cfg { > u8 addr; > }; > > +struct sdhci_cdns_drv_data { > + int (*init)(struct platform_device *pdev); > + const struct sdhci_pltfm_data pltfm_data; > +}; The change to introduce struct sdhci_cdns_drv_data and sdhci_cdns_uniphier_pltfm_data -> sdhci_cdns_uniphier_drv_data etc, could be a separate patch. > + > static const struct sdhci_cdns_phy_cfg sdhci_cdns_phy_cfgs[] = { > { "cdns,phy-input-delay-sd-highspeed", SDHCI_CDNS_PHY_DLY_SD_HS, }, > { "cdns,phy-input-delay-legacy", SDHCI_CDNS_PHY_DLY_SD_DEFAULT, }, > @@ -316,6 +323,92 @@ static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, > sdhci_set_uhs_signaling(host, timing); > } > > +/* Elba control register bits [6:3] are byte-lane enables */ > +#define ELBA_BYTE_ENABLE_MASK(x) ((x) << 3) > + > +/* > + * The Pensando Elba SoC explicitly controls byte-lane enabling on writes > + * which includes writes to the HRS registers. > + */ > +static void elba_priv_writel(struct sdhci_cdns_priv *priv, u32 val, > + void __iomem *reg) > +{ > + unsigned long flags; > + > + spin_lock_irqsave(&priv->wrlock, flags); > + writel(ELBA_BYTE_ENABLE_MASK(0xf), priv->ctl_addr); > + writel(val, reg); > + spin_unlock_irqrestore(&priv->wrlock, flags); Here are below there is an assumption that there is ordering between successive writel to different registers, and ordering between them and the spinlock. If that is the case, then a comment would be good to explain that. > +} > + > +static void elba_write_l(struct sdhci_host *host, u32 val, int reg) > +{ > + elba_priv_writel(sdhci_cdns_priv(host), val, host->ioaddr + reg); > +} > + > +static void elba_write_w(struct sdhci_host *host, u16 val, int reg) > +{ > + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); > + u32 byte_enables; > + unsigned long flags; > + > + byte_enables = GENMASK(1, 0) << (reg & 0x3); > + spin_lock_irqsave(&priv->wrlock, flags); > + writel(ELBA_BYTE_ENABLE_MASK(byte_enables), priv->ctl_addr); > + writew(val, host->ioaddr + reg); > + spin_unlock_irqrestore(&priv->wrlock, flags); > +} > + > +static void elba_write_b(struct sdhci_host *host, u8 val, int reg) > +{ > + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); > + u32 byte_enables; > + unsigned long flags; > + > + byte_enables = BIT(0) << (reg & 0x3); > + spin_lock_irqsave(&priv->wrlock, flags); > + writel(ELBA_BYTE_ENABLE_MASK(byte_enables), priv->ctl_addr); > + writeb(val, host->ioaddr + reg); > + spin_unlock_irqrestore(&priv->wrlock, flags); > +} > + > +static const struct sdhci_ops sdhci_elba_ops = { > + .write_l = elba_write_l, > + .write_w = elba_write_w, > + .write_b = elba_write_b, > + .set_clock = sdhci_set_clock, > + .get_timeout_clock = sdhci_cdns_get_timeout_clock, > + .set_bus_width = sdhci_set_bus_width, > + .reset = sdhci_reset, > + .set_uhs_signaling = sdhci_cdns_set_uhs_signaling, > +}; > + > +static int elba_drv_init(struct platform_device *pdev) > +{ > + struct sdhci_host *host = platform_get_drvdata(pdev); > + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); > + struct resource *iomem; > + void __iomem *ioaddr; > + > + host->mmc->caps |= (MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA); > + > + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 1); > + if (!iomem) > + return -ENOMEM; > + > + /* Byte-lane control register */ > + ioaddr = devm_platform_ioremap_resource(pdev, 1); > + if (IS_ERR(ioaddr)) > + return PTR_ERR(ioaddr); > + > + priv->ctl_addr = ioaddr; > + priv->priv_writel = elba_priv_writel; > + spin_lock_init(&priv->wrlock); > + writel(ELBA_BYTE_ENABLE_MASK(0xf), priv->ctl_addr); > + > + return 0; > +} > + > static const struct sdhci_ops sdhci_cdns_ops = { > .set_clock = sdhci_set_clock, > .get_timeout_clock = sdhci_cdns_get_timeout_clock, > @@ -325,13 +418,24 @@ static const struct sdhci_ops sdhci_cdns_ops = { > .set_uhs_signaling = sdhci_cdns_set_uhs_signaling, > }; > > -static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = { > - .ops = &sdhci_cdns_ops, > - .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, > +static const struct sdhci_cdns_drv_data sdhci_cdns_uniphier_drv_data = { > + .pltfm_data = { > + .ops = &sdhci_cdns_ops, > + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, > + }, > }; > > -static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = { > - .ops = &sdhci_cdns_ops, > +static const struct sdhci_cdns_drv_data sdhci_elba_drv_data = { > + .init = elba_drv_init, > + .pltfm_data = { > + .ops = &sdhci_elba_ops, > + }, > +}; > + > +static const struct sdhci_cdns_drv_data sdhci_cdns_drv_data = { > + .pltfm_data = { > + .ops = &sdhci_cdns_ops, > + }, > }; > > static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, > @@ -357,7 +461,7 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, > static int sdhci_cdns_probe(struct platform_device *pdev) > { > struct sdhci_host *host; > - const struct sdhci_pltfm_data *data; > + const struct sdhci_cdns_drv_data *data; > struct sdhci_pltfm_host *pltfm_host; > struct sdhci_cdns_priv *priv; > struct clk *clk; > @@ -376,10 +480,10 @@ static int sdhci_cdns_probe(struct platform_device *pdev) > > data = of_device_get_match_data(dev); > if (!data) > - data = &sdhci_cdns_pltfm_data; > + data = &sdhci_cdns_drv_data; > > nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node); > - host = sdhci_pltfm_init(pdev, data, > + host = sdhci_pltfm_init(pdev, &data->pltfm_data, > struct_size(priv, phy_params, nr_phy_params)); > if (IS_ERR(host)) { > ret = PTR_ERR(host); > @@ -397,6 +501,11 @@ static int sdhci_cdns_probe(struct platform_device *pdev) > host->ioaddr += SDHCI_CDNS_SRS_BASE; > host->mmc_host_ops.hs400_enhanced_strobe = > sdhci_cdns_hs400_enhanced_strobe; > + if (data->init) { > + ret = data->init(pdev); > + if (ret) > + goto free; > + } > sdhci_enable_v4_mode(host); > __sdhci_read_caps(host, &version, NULL, NULL); > > @@ -461,7 +570,11 @@ static const struct dev_pm_ops sdhci_cdns_pm_ops = { > static const struct of_device_id sdhci_cdns_match[] = { > { > .compatible = "socionext,uniphier-sd4hc", > - .data = &sdhci_cdns_uniphier_pltfm_data, > + .data = &sdhci_cdns_uniphier_drv_data, > + }, > + { > + .compatible = "amd,pensando-elba-sd4hc", > + .data = &sdhci_elba_drv_data, > }, > { .compatible = "cdns,sd4hc" }, > { /* sentinel */ }
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 5e19a961c34d..9e41115cc753 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -255,6 +255,7 @@ config MMC_SDHCI_CADENCE tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller" depends on MMC_SDHCI_PLTFM depends on OF + select MMC_SDHCI_IO_ACCESSORS help This selects the Cadence SD/SDIO/eMMC driver. diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index 708d4297f241..e92aa79a8be2 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -66,6 +66,8 @@ struct sdhci_cdns_phy_param { struct sdhci_cdns_priv { void __iomem *hrs_addr; + void __iomem *ctl_addr; /* write control */ + spinlock_t wrlock; /* write lock */ bool enhanced_strobe; void (*priv_writel)(struct sdhci_cdns_priv *priv, u32 val, void __iomem *reg); unsigned int nr_phy_params; @@ -77,6 +79,11 @@ struct sdhci_cdns_phy_cfg { u8 addr; }; +struct sdhci_cdns_drv_data { + int (*init)(struct platform_device *pdev); + const struct sdhci_pltfm_data pltfm_data; +}; + static const struct sdhci_cdns_phy_cfg sdhci_cdns_phy_cfgs[] = { { "cdns,phy-input-delay-sd-highspeed", SDHCI_CDNS_PHY_DLY_SD_HS, }, { "cdns,phy-input-delay-legacy", SDHCI_CDNS_PHY_DLY_SD_DEFAULT, }, @@ -316,6 +323,92 @@ static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, sdhci_set_uhs_signaling(host, timing); } +/* Elba control register bits [6:3] are byte-lane enables */ +#define ELBA_BYTE_ENABLE_MASK(x) ((x) << 3) + +/* + * The Pensando Elba SoC explicitly controls byte-lane enabling on writes + * which includes writes to the HRS registers. + */ +static void elba_priv_writel(struct sdhci_cdns_priv *priv, u32 val, + void __iomem *reg) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->wrlock, flags); + writel(ELBA_BYTE_ENABLE_MASK(0xf), priv->ctl_addr); + writel(val, reg); + spin_unlock_irqrestore(&priv->wrlock, flags); +} + +static void elba_write_l(struct sdhci_host *host, u32 val, int reg) +{ + elba_priv_writel(sdhci_cdns_priv(host), val, host->ioaddr + reg); +} + +static void elba_write_w(struct sdhci_host *host, u16 val, int reg) +{ + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); + u32 byte_enables; + unsigned long flags; + + byte_enables = GENMASK(1, 0) << (reg & 0x3); + spin_lock_irqsave(&priv->wrlock, flags); + writel(ELBA_BYTE_ENABLE_MASK(byte_enables), priv->ctl_addr); + writew(val, host->ioaddr + reg); + spin_unlock_irqrestore(&priv->wrlock, flags); +} + +static void elba_write_b(struct sdhci_host *host, u8 val, int reg) +{ + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); + u32 byte_enables; + unsigned long flags; + + byte_enables = BIT(0) << (reg & 0x3); + spin_lock_irqsave(&priv->wrlock, flags); + writel(ELBA_BYTE_ENABLE_MASK(byte_enables), priv->ctl_addr); + writeb(val, host->ioaddr + reg); + spin_unlock_irqrestore(&priv->wrlock, flags); +} + +static const struct sdhci_ops sdhci_elba_ops = { + .write_l = elba_write_l, + .write_w = elba_write_w, + .write_b = elba_write_b, + .set_clock = sdhci_set_clock, + .get_timeout_clock = sdhci_cdns_get_timeout_clock, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_cdns_set_uhs_signaling, +}; + +static int elba_drv_init(struct platform_device *pdev) +{ + struct sdhci_host *host = platform_get_drvdata(pdev); + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); + struct resource *iomem; + void __iomem *ioaddr; + + host->mmc->caps |= (MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA); + + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!iomem) + return -ENOMEM; + + /* Byte-lane control register */ + ioaddr = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(ioaddr)) + return PTR_ERR(ioaddr); + + priv->ctl_addr = ioaddr; + priv->priv_writel = elba_priv_writel; + spin_lock_init(&priv->wrlock); + writel(ELBA_BYTE_ENABLE_MASK(0xf), priv->ctl_addr); + + return 0; +} + static const struct sdhci_ops sdhci_cdns_ops = { .set_clock = sdhci_set_clock, .get_timeout_clock = sdhci_cdns_get_timeout_clock, @@ -325,13 +418,24 @@ static const struct sdhci_ops sdhci_cdns_ops = { .set_uhs_signaling = sdhci_cdns_set_uhs_signaling, }; -static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = { - .ops = &sdhci_cdns_ops, - .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, +static const struct sdhci_cdns_drv_data sdhci_cdns_uniphier_drv_data = { + .pltfm_data = { + .ops = &sdhci_cdns_ops, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, + }, }; -static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = { - .ops = &sdhci_cdns_ops, +static const struct sdhci_cdns_drv_data sdhci_elba_drv_data = { + .init = elba_drv_init, + .pltfm_data = { + .ops = &sdhci_elba_ops, + }, +}; + +static const struct sdhci_cdns_drv_data sdhci_cdns_drv_data = { + .pltfm_data = { + .ops = &sdhci_cdns_ops, + }, }; static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, @@ -357,7 +461,7 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, static int sdhci_cdns_probe(struct platform_device *pdev) { struct sdhci_host *host; - const struct sdhci_pltfm_data *data; + const struct sdhci_cdns_drv_data *data; struct sdhci_pltfm_host *pltfm_host; struct sdhci_cdns_priv *priv; struct clk *clk; @@ -376,10 +480,10 @@ static int sdhci_cdns_probe(struct platform_device *pdev) data = of_device_get_match_data(dev); if (!data) - data = &sdhci_cdns_pltfm_data; + data = &sdhci_cdns_drv_data; nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node); - host = sdhci_pltfm_init(pdev, data, + host = sdhci_pltfm_init(pdev, &data->pltfm_data, struct_size(priv, phy_params, nr_phy_params)); if (IS_ERR(host)) { ret = PTR_ERR(host); @@ -397,6 +501,11 @@ static int sdhci_cdns_probe(struct platform_device *pdev) host->ioaddr += SDHCI_CDNS_SRS_BASE; host->mmc_host_ops.hs400_enhanced_strobe = sdhci_cdns_hs400_enhanced_strobe; + if (data->init) { + ret = data->init(pdev); + if (ret) + goto free; + } sdhci_enable_v4_mode(host); __sdhci_read_caps(host, &version, NULL, NULL); @@ -461,7 +570,11 @@ static const struct dev_pm_ops sdhci_cdns_pm_ops = { static const struct of_device_id sdhci_cdns_match[] = { { .compatible = "socionext,uniphier-sd4hc", - .data = &sdhci_cdns_uniphier_pltfm_data, + .data = &sdhci_cdns_uniphier_drv_data, + }, + { + .compatible = "amd,pensando-elba-sd4hc", + .data = &sdhci_elba_drv_data, }, { .compatible = "cdns,sd4hc" }, { /* sentinel */ }
Add support for AMD Pensando Elba SoC which explicitly controls byte-lane enables on writes. Select MMC_SDHCI_IO_ACCESSORS for MMC_SDHCI_CADENCE which allows Elba SoC sdhci_elba_ops to overwrite the SDHCI IO memory accessors. Signed-off-by: Brad Larson <blarson@amd.com> --- Changes since v6: - Previously patch 16/17 --- drivers/mmc/host/Kconfig | 1 + drivers/mmc/host/sdhci-cadence.c | 131 ++++++++++++++++++++++++++++--- 2 files changed, 123 insertions(+), 9 deletions(-)