Hi James, Can this patch be poushed to 3.9+ merge window? Thnaks, Maya > This patch adds Platform glue driver for ufshcd. > > Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx> > Reviewed-by: Namjae Jeon <linkinjeon@xxxxxxxxx> > Reviewed-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> > Reviewed-by: Sujit Reddy Thumma <sthumma@xxxxxxxxxxxxxx> > Tested-by: Maya Erez <merez@xxxxxxxxxxxxxx> > Signed-off-by: Vinayak Holikatti <vinholikatti@xxxxxxxxx> > Signed-off-by: Santosh Yaraganavi <santoshsy@xxxxxxxxx> > --- > drivers/scsi/ufs/Kconfig | 11 ++ > drivers/scsi/ufs/Makefile | 1 + > drivers/scsi/ufs/ufshcd-pltfrm.c | 217 > ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 229 insertions(+), 0 deletions(-) > create mode 100644 drivers/scsi/ufs/ufshcd-pltfrm.c > > diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig > index 0371047..35faf24 100644 > --- a/drivers/scsi/ufs/Kconfig > +++ b/drivers/scsi/ufs/Kconfig > @@ -57,3 +57,14 @@ config SCSI_UFSHCD_PCI > If you have a controller with this interface, say Y or M here. > > If unsure, say N. > + > +config SCSI_UFSHCD_PLATFORM > + tristate "Platform bus based UFS Controller support" > + depends on SCSI_UFSHCD > + ---help--- > + This selects the UFS host controller support. Select this if > + you have an UFS controller on Platform bus. > + > + If you have a controller with this interface, say Y or M here. > + > + If unsure, say N. > diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile > index 9eda0df..1e5bd48 100644 > --- a/drivers/scsi/ufs/Makefile > +++ b/drivers/scsi/ufs/Makefile > @@ -1,3 +1,4 @@ > # UFSHCD makefile > obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o > obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o > +obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o > diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c > b/drivers/scsi/ufs/ufshcd-pltfrm.c > new file mode 100644 > index 0000000..03319ac > --- /dev/null > +++ b/drivers/scsi/ufs/ufshcd-pltfrm.c > @@ -0,0 +1,217 @@ > +/* > + * Universal Flash Storage Host controller Platform bus based glue driver > + * > + * This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c > + * Copyright (C) 2011-2013 Samsung India Software Operations > + * > + * Authors: > + * Santosh Yaraganavi <santosh.sy@xxxxxxxxxxx> > + * Vinayak Holikatti <h.vinayak@xxxxxxxxxxx> > + * > + * 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, or (at your option) any later version. > + * See the COPYING file in the top-level directory or visit > + * <http://www.gnu.org/licenses/gpl-2.0.html> > + * > + * 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. > + * > + * This program is provided "AS IS" and "WITH ALL FAULTS" and > + * without warranty of any kind. You are solely responsible for > + * determining the appropriateness of using and distributing > + * the program and assume all risks associated with your exercise > + * of rights with respect to the program, including but not limited > + * to infringement of third party rights, the risks and costs of > + * program errors, damage to or loss of data, programs or equipment, > + * and unavailability or interruption of operations. Under no > + * circumstances will the contributor of this Program be liable for > + * any damages of any kind arising from your use or distribution of > + * this program. > + */ > + > +#include "ufshcd.h" > +#include <linux/platform_device.h> > + > +#ifdef CONFIG_PM > +/** > + * ufshcd_pltfrm_suspend - suspend power management function > + * @dev: pointer to device handle > + * > + * > + * Returns 0 > + */ > +static int ufshcd_pltfrm_suspend(struct device *dev) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct ufs_hba *hba = platform_get_drvdata(pdev); > + > + /* > + * TODO: > + * 1. Call ufshcd_suspend > + * 2. Do bus specific power management > + */ > + > + disable_irq(hba->irq); > + > + return 0; > +} > + > +/** > + * ufshcd_pltfrm_resume - resume power management function > + * @dev: pointer to device handle > + * > + * Returns 0 > + */ > +static int ufshcd_pltfrm_resume(struct device *dev) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct ufs_hba *hba = platform_get_drvdata(pdev); > + > + /* > + * TODO: > + * 1. Call ufshcd_resume. > + * 2. Do bus specific wake up > + */ > + > + enable_irq(hba->irq); > + > + return 0; > +} > +#else > +#define ufshcd_pltfrm_suspend NULL > +#define ufshcd_pltfrm_resume NULL > +#endif > + > +/** > + * ufshcd_pltfrm_probe - probe routine of the driver > + * @pdev: pointer to Platform device handle > + * > + * Returns 0 on success, non-zero value on failure > + */ > +static int ufshcd_pltfrm_probe(struct platform_device *pdev) > +{ > + struct ufs_hba *hba; > + void __iomem *mmio_base; > + struct resource *mem_res; > + struct resource *irq_res; > + resource_size_t mem_size; > + int err; > + struct device *dev = &pdev->dev; > + > + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!mem_res) { > + dev_err(&pdev->dev, > + "Memory resource not available\n"); > + err = -ENODEV; > + goto out_error; > + } > + > + mem_size = resource_size(mem_res); > + if (!request_mem_region(mem_res->start, mem_size, "ufshcd")) { > + dev_err(&pdev->dev, > + "Cannot reserve the memory resource\n"); > + err = -EBUSY; > + goto out_error; > + } > + > + mmio_base = ioremap_nocache(mem_res->start, mem_size); > + if (!mmio_base) { > + dev_err(&pdev->dev, "memory map failed\n"); > + err = -ENOMEM; > + goto out_release_regions; > + } > + > + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > + if (!irq_res) { > + dev_err(&pdev->dev, "IRQ resource not available\n"); > + err = -ENODEV; > + goto out_iounmap; > + } > + > + err = dma_set_coherent_mask(dev, dev->coherent_dma_mask); > + if (err) { > + dev_err(&pdev->dev, "set dma mask failed\n"); > + goto out_iounmap; > + } > + > + err = ufshcd_init(&pdev->dev, &hba, mmio_base, irq_res->start); > + if (err) { > + dev_err(&pdev->dev, "Intialization failed\n"); > + goto out_iounmap; > + } > + > + platform_set_drvdata(pdev, hba); > + > + return 0; > + > +out_iounmap: > + iounmap(mmio_base); > +out_release_regions: > + release_mem_region(mem_res->start, mem_size); > +out_error: > + return err; > +} > + > +/** > + * ufshcd_pltfrm_remove - remove platform driver routine > + * @pdev: pointer to platform device handle > + * > + * Returns 0 on success, non-zero value on failure > + */ > +static int ufshcd_pltfrm_remove(struct platform_device *pdev) > +{ > + struct resource *mem_res; > + resource_size_t mem_size; > + struct ufs_hba *hba = platform_get_drvdata(pdev); > + > + disable_irq(hba->irq); > + > + /* Some buggy controllers raise interrupt after > + * the resources are removed. So first we unregister the > + * irq handler and then the resources used by driver > + */ > + > + free_irq(hba->irq, hba); > + ufshcd_remove(hba); > + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!mem_res) > + dev_err(&pdev->dev, "ufshcd: Memory resource not available\n"); > + else { > + mem_size = resource_size(mem_res); > + release_mem_region(mem_res->start, mem_size); > + } > + platform_set_drvdata(pdev, NULL); > + return 0; > +} > + > +static const struct of_device_id ufs_of_match[] = { > + { .compatible = "jedec,ufs-1.1"}, > +}; > + > +static const struct dev_pm_ops ufshcd_dev_pm_ops = { > + .suspend = ufshcd_pltfrm_suspend, > + .resume = ufshcd_pltfrm_resume, > +}; > + > +static struct platform_driver ufshcd_pltfrm_driver = { > + .probe = ufshcd_pltfrm_probe, > + .remove = ufshcd_pltfrm_remove, > + .driver = { > + .name = "ufshcd", > + .owner = THIS_MODULE, > + .pm = &ufshcd_dev_pm_ops, > + .of_match_table = ufs_of_match, > + }, > +}; > + > +module_platform_driver(ufshcd_pltfrm_driver); > + > +MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@xxxxxxxxxxx>"); > +MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@xxxxxxxxxxx>"); > +MODULE_DESCRIPTION("UFS host controller Pltform bus based glue driver"); > +MODULE_LICENSE("GPL"); > +MODULE_VERSION(UFSHCD_DRIVER_VERSION); > -- > 1.7.5.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Maya Erez QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
