Hello! I wonder if somebody's had some spare moment to review this patch. Welcome advice and feedback as usual Many thanks in advance. Best Regards, Giuseppe > -----Original Message----- > From: Giuseppe CAVALLARO [mailto:peppe.cavallaro@xxxxxx] > Sent: Thursday, July 29, 2010 10:31 AM > To: linux-mmc@xxxxxxxxxxxxxxx > Cc: Peppe CAVALLARO > Subject: [PATCH] mmc: add SDHCI driver for STM platforms. > > This patch adds the Arasan MMC/SD/SDIO driver > for the STM ST40 platforms. It is based on the > SDHCI driver. > It has been tested on the STx7106/STx7108/STx5289 > platforms. > > Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx> > --- > drivers/mmc/host/Kconfig | 12 +++ > drivers/mmc/host/Makefile | 1 + > drivers/mmc/host/sdhci-stm.c | 184 > +++++++++++++++++++++++++++++++++++++++++ > include/linux/mmc/sdhci-stm.h | 40 +++++++++ > 4 files changed, 237 insertions(+), 0 deletions(-) > create mode 100644 drivers/mmc/host/sdhci-stm.c > create mode 100644 include/linux/mmc/sdhci-stm.h > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index f06d06e..a5a3313 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -148,6 +148,18 @@ config MMC_SDHCI_SPEAR > > If unsure, say N. > > +config MMC_SDHCI_STM > + tristate "SDHCI support on STM platforms" > + depends on MMC_SDHCI && CPU_SUBTYPE_ST40 > + help > + This selects the Secure Digital Host Controller Interface (SDHCI) > + often referrered to as the HSMMC block in some of the STM range > + of SoC (e.g. STx7106/STx7108/STx5289). > + > + If you have a controller with this interface, say Y or M here. > + > + If unsure, say N. > + > config MMC_SDHCI_S3C_DMA > bool "DMA support on S3C SDHCI" > depends on MMC_SDHCI_S3C && EXPERIMENTAL > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile > index e30c2ee..7b47e8d 100644 > --- a/drivers/mmc/host/Makefile > +++ b/drivers/mmc/host/Makefile > @@ -15,6 +15,7 @@ obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o > obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o > obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o > obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o > +obj-$(CONFIG_MMC_SDHCI_STM) += sdhci-stm.o > obj-$(CONFIG_MMC_WBSD) += wbsd.o > obj-$(CONFIG_MMC_AU1X) += au1xmmc.o > obj-$(CONFIG_MMC_OMAP) += omap.o > diff --git a/drivers/mmc/host/sdhci-stm.c b/drivers/mmc/host/sdhci-stm.c > new file mode 100644 > index 0000000..397ecf7 > --- /dev/null > +++ b/drivers/mmc/host/sdhci-stm.c > @@ -0,0 +1,184 @@ > +/* linux/drivers/mmc/host/sdhci-stm.c > + * > + * Copyright (C) 2010 STMicroelectronics Ltd > + * Author: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx> > + * > + * SDHCI support for STM platforms > + * > + * 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. > + */ > + > +#include <linux/platform_device.h> > +#include <linux/slab.h> > +#include <linux/mmc/host.h> > +#include <linux/io.h> > + > +#include <linux/mmc/sdhci-stm.h> > + > +#include "sdhci.h" > + > +static struct sdhci_ops sdhci_pltfm_ops = { > + /* Nothing to do for now. */ > +}; > + > +struct sdhci_stm { > + struct sdhci_host *host; > + struct platform_device *pdev; > + struct resource *ioarea; > + struct sdhci_platform_data *pdata; > +}; > + > +static int __devinit sdhci_probe(struct platform_device *pdev) > +{ > + struct sdhci_platform_data *pdata; > + struct device *dev = &pdev->dev; > + struct sdhci_host *host; > + struct sdhci_stm *sc; > + struct resource *res; > + int ret, irq; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(dev, "no memory specified\n"); > + return -ENOENT; > + } > + > + irq = platform_get_irq_byname(pdev, "mmcirq"); > + if (irq < 0) { > + dev_err(dev, "no irq specified\n"); > + return irq; > + } > + > + pdata = pdev->dev.platform_data; > + if (!pdata) { > + dev_err(dev, "no device data specified\n"); > + return -ENOENT; > + } > + > + host = sdhci_alloc_host(&pdev->dev, 0); > + if (IS_ERR(host)) { > + ret = PTR_ERR(host); > + dev_dbg(&pdev->dev, "error allocating host\n"); > + return PTR_ERR(host); > + } > + > + sc = sdhci_priv(host); > + sc->host = host; > + sc->pdev = pdev; > + sc->pdata = pdata; > + > + platform_set_drvdata(pdev, host); > + > + sc->ioarea = request_mem_region(res->start, resource_size(res), > + pdev->name); > + if (!sc->ioarea) { > + dev_err(dev, "failed to reserve register area\n"); > + ret = -ENXIO; > + goto out; > + } > + > + ret = sdhci_claim_resource(pdev); > + if (ret < 0) > + goto out; > + > + host->hw_name = "sdhci-stm"; > + host->ops = &sdhci_pltfm_ops; > + host->irq = irq; > + host->quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; > + > + host->ioaddr = ioremap(res->start, resource_size(res)); > + if (!host->ioaddr) { > + dev_err(dev, "failed to map registers\n"); > + ret = -ENOMEM; > + goto out; > + } > + > + ret = sdhci_add_host(host); > + if (ret) { > + dev_dbg(&pdev->dev, "error adding host\n"); > + goto out; > + } > + > + return 0; > + > +out: > + if (host->ioaddr) > + iounmap(host->ioaddr); > + > + if (sc->ioarea) { > + release_resource(sc->ioarea); > + kfree(sc->ioarea); > + } > + > + sdhci_free_host(host); > + > + return ret; > +} > + > +static int __devexit sdhci_remove(struct platform_device *pdev) > +{ > + struct sdhci_host *host = platform_get_drvdata(pdev); > + struct sdhci_stm *sc = sdhci_priv(host); > + > + sdhci_remove_host(host, 1); > + > + iounmap(host->ioaddr); > + release_resource(sc->ioarea); > + kfree(sc->ioarea); > + > + sdhci_free_host(host); > + platform_set_drvdata(pdev, NULL); > + > + return 0; > +} > + > +#ifdef CONFIG_PM > +static int sdhci_stm_suspend(struct platform_device *dev, pm_message_t pm) > +{ > + struct sdhci_host *host = platform_get_drvdata(dev); > + > + sdhci_suspend_host(host, pm); > + return 0; > +} > + > +static int sdhci_stm_resume(struct platform_device *dev) > +{ > + struct sdhci_host *host = platform_get_drvdata(dev); > + > + sdhci_resume_host(host); > + return 0; > +} > +#endif > + > +static struct platform_driver sdhci_driver = { > + .driver = { > + .name = "sdhci-stm", > + .owner = THIS_MODULE, > + }, > + .probe = sdhci_probe, > + .remove = __devexit_p(sdhci_remove), > +#ifdef CONFIG_PM > + .suspend = sdhci_stm_suspend, > + .resume = sdhci_stm_resume, > +#endif > +}; > + > +static int __init sdhci_stm_init(void) > +{ > + return platform_driver_register(&sdhci_driver); > +} > + > +module_init(sdhci_stm_init); > + > +static void __exit sdhci_stm_exit(void) > +{ > + platform_driver_unregister(&sdhci_driver); > +} > + > +module_exit(sdhci_stm_exit); > + > +MODULE_DESCRIPTION("STM Secure Digital Host Controller Interface driver"); > +MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>"); > +MODULE_LICENSE("GPL v2"); > diff --git a/include/linux/mmc/sdhci-stm.h b/include/linux/mmc/sdhci-stm.h > new file mode 100644 > index 0000000..4e6ad14 > --- /dev/null > +++ b/include/linux/mmc/sdhci-stm.h > @@ -0,0 +1,40 @@ > +/* > + * Author: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx> > + * > + * include/linux/mmc/sdhci-stm.h > + * > + * platform data for the sdhci stm driver. > + * > + * Copyright (C) 2010 STMicroelectronics Ltd > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License. > + * > + */ > + > +#ifndef __SDHCI_STM_PLAT_H__ > +#define __SDHCI_STM_PLAT_H__ > + > +#include <linux/stm/platform.h> > +#include <linux/stm/pad.h> > + > +struct sdhci_platform_data { > + struct stm_pad_config *pad_config; > +}; > + > +/* SDHCI_STM Resource configuration */ > +static inline int sdhci_claim_resource(struct platform_device *pdev) > +{ > + int ret = 0; > + struct sdhci_platform_data *plat_dat = pdev->dev.platform_data; > + > + /* Pad routing setup required on STM platforms */ > + if (!devm_stm_pad_claim(&pdev->dev, plat_dat->pad_config, > + dev_name(&pdev->dev))) { > + pr_err("%s: Failed to request pads!\n", __func__); > + ret = -ENODEV; > + } > + return ret; > +} > +#endif /* __SDHCI_STM_PLAT_H__ */ > -- > 1.5.5.6 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
