| Message ID | 1404918461-25390-2-git-send-email-peter.griffin@linaro.org |
|---|---|
| State | Accepted |
| Commit | f52d9c4f459bdab128b1b033f26fb52d3418e0f5 |
| Headers | show |
On 9 July 2014 17:07, Peter Griffin <peter.griffin@linaro.org> wrote: > This platform driver adds initial support for the SDHCI host controller > found on STMicroelectronics SoCs. > > It has been tested on STiH41x b2020 platforms currently. > > Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> > Signed-off-by: Peter Griffin <peter.griffin@linaro.org> > Acked-by: Lee Jones <lee.jones@linaro.org> > Acked-by: Maxime Coquelin <maxime.coquelin@st.com> Thanks! Applied for next! Kind regards Uffe > --- > drivers/mmc/host/Kconfig | 12 +++ > drivers/mmc/host/Makefile | 1 + > drivers/mmc/host/sdhci-st.c | 176 ++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 189 insertions(+) > create mode 100644 drivers/mmc/host/sdhci-st.c > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index a565254..6615b79 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -290,6 +290,18 @@ config MMC_MOXART > be found on some embedded hardware such as UC-7112-LX. > If you have a controller with this interface, say Y here. > > +config MMC_SDHCI_ST > + tristate "SDHCI support on STMicroelectronics SoC" > + depends on ARCH_STI > + depends on MMC_SDHCI_PLTFM > + select MMC_SDHCI_IO_ACCESSORS > + help > + This selects the Secure Digital Host Controller Interface in > + STMicroelectronics SoCs. > + > + If you have a controller with this interface, say Y or M here. > + If unsure, say N. > + > config MMC_OMAP > tristate "TI OMAP Multimedia Card Interface support" > depends on ARCH_OMAP > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile > index 7f81ddf..f211eed 100644 > --- a/drivers/mmc/host/Makefile > +++ b/drivers/mmc/host/Makefile > @@ -68,6 +68,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o > obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o > obj-$(CONFIG_MMC_SDHCI_BCM2835) += sdhci-bcm2835.o > obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o > +obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o > > ifeq ($(CONFIG_CB710_DEBUG),y) > CFLAGS-cb710-mmc += -DDEBUG > diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c > new file mode 100644 > index 0000000..328f348 > --- /dev/null > +++ b/drivers/mmc/host/sdhci-st.c > @@ -0,0 +1,176 @@ > +/* > + * Support for SDHCI on STMicroelectronics SoCs > + * > + * Copyright (C) 2014 STMicroelectronics Ltd > + * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> > + * Contributors: Peter Griffin <peter.griffin@linaro.org> > + * > + * Based on sdhci-cns3xxx.c > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + */ > + > +#include <linux/io.h> > +#include <linux/of.h> > +#include <linux/module.h> > +#include <linux/err.h> > +#include <linux/mmc/host.h> > + > +#include "sdhci-pltfm.h" > + > +static u32 sdhci_st_readl(struct sdhci_host *host, int reg) > +{ > + u32 ret; > + > + switch (reg) { > + case SDHCI_CAPABILITIES: > + ret = readl_relaxed(host->ioaddr + reg); > + /* Support 3.3V and 1.8V */ > + ret &= ~SDHCI_CAN_VDD_300; > + break; > + default: > + ret = readl_relaxed(host->ioaddr + reg); > + } > + return ret; > +} > + > +static const struct sdhci_ops sdhci_st_ops = { > + .get_max_clock = sdhci_pltfm_clk_get_max_clock, > + .set_clock = sdhci_set_clock, > + .set_bus_width = sdhci_set_bus_width, > + .read_l = sdhci_st_readl, > + .reset = sdhci_reset, > +}; > + > +static const struct sdhci_pltfm_data sdhci_st_pdata = { > + .ops = &sdhci_st_ops, > + .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | > + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, > +}; > + > + > +static int sdhci_st_probe(struct platform_device *pdev) > +{ > + struct sdhci_host *host; > + struct sdhci_pltfm_host *pltfm_host; > + struct clk *clk; > + int ret = 0; > + u16 host_version; > + > + clk = devm_clk_get(&pdev->dev, "mmc"); > + if (IS_ERR(clk)) { > + dev_err(&pdev->dev, "Peripheral clk not found\n"); > + return PTR_ERR(clk); > + } > + > + host = sdhci_pltfm_init(pdev, &sdhci_st_pdata, 0); > + if (IS_ERR(host)) { > + dev_err(&pdev->dev, "Failed sdhci_pltfm_init\n"); > + return PTR_ERR(host); > + } > + > + ret = mmc_of_parse(host->mmc); > + > + if (ret) { > + dev_err(&pdev->dev, "Failed mmc_of_parse\n"); > + return ret; > + } > + > + clk_prepare_enable(clk); > + > + pltfm_host = sdhci_priv(host); > + pltfm_host->clk = clk; > + > + ret = sdhci_add_host(host); > + if (ret) { > + dev_err(&pdev->dev, "Failed sdhci_add_host\n"); > + goto err_out; > + } > + > + platform_set_drvdata(pdev, host); > + > + host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION)); > + > + dev_info(&pdev->dev, "SDHCI ST Initialised: Host Version: 0x%x Vendor Version 0x%x\n", > + ((host_version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT), > + ((host_version & SDHCI_VENDOR_VER_MASK) >> > + SDHCI_VENDOR_VER_SHIFT)); > + > + return 0; > + > +err_out: > + clk_disable_unprepare(clk); > + sdhci_pltfm_free(pdev); > + > + return ret; > +} > + > +static int sdhci_st_remove(struct platform_device *pdev) > +{ > + struct sdhci_host *host = platform_get_drvdata(pdev); > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + > + clk_disable_unprepare(pltfm_host->clk); > + > + return sdhci_pltfm_unregister(pdev); > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int sdhci_st_suspend(struct device *dev) > +{ > + struct sdhci_host *host = dev_get_drvdata(dev); > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + int ret = sdhci_suspend_host(host); > + > + if (ret) > + goto out; > + > + clk_disable_unprepare(pltfm_host->clk); > +out: > + return ret; > +} > + > +static int sdhci_st_resume(struct device *dev) > +{ > + struct sdhci_host *host = dev_get_drvdata(dev); > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + > + clk_prepare_enable(pltfm_host->clk); > + > + return sdhci_resume_host(host); > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(sdhci_st_pmops, sdhci_st_suspend, sdhci_st_resume); > + > +static const struct of_device_id st_sdhci_match[] = { > + { .compatible = "st,sdhci" }, > + {}, > +}; > + > +MODULE_DEVICE_TABLE(of, st_sdhci_match); > + > +static struct platform_driver sdhci_st_driver = { > + .probe = sdhci_st_probe, > + .remove = sdhci_st_remove, > + .driver = { > + .name = "sdhci-st", > + .pm = &sdhci_st_pmops, > + .of_match_table = of_match_ptr(st_sdhci_match), > + }, > +}; > + > +module_platform_driver(sdhci_st_driver); > + > +MODULE_DESCRIPTION("SDHCI driver for STMicroelectronics SoCs"); > +MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); > +MODULE_LICENSE("GPL v2"); > +MODULE_ALIAS("platform:st-sdhci"); > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index a565254..6615b79 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -290,6 +290,18 @@ config MMC_MOXART be found on some embedded hardware such as UC-7112-LX. If you have a controller with this interface, say Y here. +config MMC_SDHCI_ST + tristate "SDHCI support on STMicroelectronics SoC" + depends on ARCH_STI + depends on MMC_SDHCI_PLTFM + select MMC_SDHCI_IO_ACCESSORS + help + This selects the Secure Digital Host Controller Interface in + STMicroelectronics SoCs. + + If you have a controller with this interface, say Y or M here. + If unsure, say N. + config MMC_OMAP tristate "TI OMAP Multimedia Card Interface support" depends on ARCH_OMAP diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 7f81ddf..f211eed 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -68,6 +68,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o obj-$(CONFIG_MMC_SDHCI_BCM2835) += sdhci-bcm2835.o obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o +obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o ifeq ($(CONFIG_CB710_DEBUG),y) CFLAGS-cb710-mmc += -DDEBUG diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c new file mode 100644 index 0000000..328f348 --- /dev/null +++ b/drivers/mmc/host/sdhci-st.c @@ -0,0 +1,176 @@ +/* + * Support for SDHCI on STMicroelectronics SoCs + * + * Copyright (C) 2014 STMicroelectronics Ltd + * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> + * Contributors: Peter Griffin <peter.griffin@linaro.org> + * + * Based on sdhci-cns3xxx.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/io.h> +#include <linux/of.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/mmc/host.h> + +#include "sdhci-pltfm.h" + +static u32 sdhci_st_readl(struct sdhci_host *host, int reg) +{ + u32 ret; + + switch (reg) { + case SDHCI_CAPABILITIES: + ret = readl_relaxed(host->ioaddr + reg); + /* Support 3.3V and 1.8V */ + ret &= ~SDHCI_CAN_VDD_300; + break; + default: + ret = readl_relaxed(host->ioaddr + reg); + } + return ret; +} + +static const struct sdhci_ops sdhci_st_ops = { + .get_max_clock = sdhci_pltfm_clk_get_max_clock, + .set_clock = sdhci_set_clock, + .set_bus_width = sdhci_set_bus_width, + .read_l = sdhci_st_readl, + .reset = sdhci_reset, +}; + +static const struct sdhci_pltfm_data sdhci_st_pdata = { + .ops = &sdhci_st_ops, + .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, +}; + + +static int sdhci_st_probe(struct platform_device *pdev) +{ + struct sdhci_host *host; + struct sdhci_pltfm_host *pltfm_host; + struct clk *clk; + int ret = 0; + u16 host_version; + + clk = devm_clk_get(&pdev->dev, "mmc"); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "Peripheral clk not found\n"); + return PTR_ERR(clk); + } + + host = sdhci_pltfm_init(pdev, &sdhci_st_pdata, 0); + if (IS_ERR(host)) { + dev_err(&pdev->dev, "Failed sdhci_pltfm_init\n"); + return PTR_ERR(host); + } + + ret = mmc_of_parse(host->mmc); + + if (ret) { + dev_err(&pdev->dev, "Failed mmc_of_parse\n"); + return ret; + } + + clk_prepare_enable(clk); + + pltfm_host = sdhci_priv(host); + pltfm_host->clk = clk; + + ret = sdhci_add_host(host); + if (ret) { + dev_err(&pdev->dev, "Failed sdhci_add_host\n"); + goto err_out; + } + + platform_set_drvdata(pdev, host); + + host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION)); + + dev_info(&pdev->dev, "SDHCI ST Initialised: Host Version: 0x%x Vendor Version 0x%x\n", + ((host_version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT), + ((host_version & SDHCI_VENDOR_VER_MASK) >> + SDHCI_VENDOR_VER_SHIFT)); + + return 0; + +err_out: + clk_disable_unprepare(clk); + sdhci_pltfm_free(pdev); + + return ret; +} + +static int sdhci_st_remove(struct platform_device *pdev) +{ + struct sdhci_host *host = platform_get_drvdata(pdev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + + clk_disable_unprepare(pltfm_host->clk); + + return sdhci_pltfm_unregister(pdev); +} + +#ifdef CONFIG_PM_SLEEP +static int sdhci_st_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + int ret = sdhci_suspend_host(host); + + if (ret) + goto out; + + clk_disable_unprepare(pltfm_host->clk); +out: + return ret; +} + +static int sdhci_st_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + + clk_prepare_enable(pltfm_host->clk); + + return sdhci_resume_host(host); +} +#endif + +static SIMPLE_DEV_PM_OPS(sdhci_st_pmops, sdhci_st_suspend, sdhci_st_resume); + +static const struct of_device_id st_sdhci_match[] = { + { .compatible = "st,sdhci" }, + {}, +}; + +MODULE_DEVICE_TABLE(of, st_sdhci_match); + +static struct platform_driver sdhci_st_driver = { + .probe = sdhci_st_probe, + .remove = sdhci_st_remove, + .driver = { + .name = "sdhci-st", + .pm = &sdhci_st_pmops, + .of_match_table = of_match_ptr(st_sdhci_match), + }, +}; + +module_platform_driver(sdhci_st_driver); + +MODULE_DESCRIPTION("SDHCI driver for STMicroelectronics SoCs"); +MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:st-sdhci");