This patch adds Platform glue driver for ufshcd. Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx> Reviewed-by: Namjae Jeon <linkinjeon@xxxxxxxxx> 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 | 205 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 217 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 d77ae97..96e1721 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 based UFS Controller support" + depends on SCSI_UFSHCD + ---help--- + This selects the UFS host controller support. If you have a + platform with UFS controller, say Y or M here. + + 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..73ac7c7 --- /dev/null +++ b/drivers/scsi/ufs/ufshcd-pltfrm.c @@ -0,0 +1,205 @@ +/* + * Universal Flash Storage Host controller driver + * + * This code is based on drivers/scsi/ufs/ufshcd.c + * Copyright (C) 2011-2012 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 + * @pdev: pointer to Platform device handle + * @mesg: power state + * + * Returns -ENOSYS + */ +static int ufshcd_pltfrm_suspend(struct platform_device *pdev, + pm_message_t mesg) +{ + /* + * TODO: + * 1. Call ufshcd_suspend + * 2. Do bus specific power management + */ + + return -ENOSYS; +} + +/** + * ufshcd_pltfrm_resume - resume power management function + * @pdev: pointer to Platform device handle + * + * Returns -ENOSYS + */ +static int ufshcd_pltfrm_resume(struct platform_device *pdev) +{ + /* + * TODO: + * 1. Call ufshcd_resume. + * 2. Do bus specific wake up + */ + + return -ENOSYS; +} +#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 __devinit +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, + "%s: Memory resource not available\n", __FILE__); + 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, + "ufshcd: 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, "ufshcd: 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, "%s: Intialization failed\n", + __FILE__); + 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 __devexit ufshcd_pltfrm_remove(struct platform_device *pdev) +{ + struct resource *mem_res; + struct resource *irq_res; + resource_size_t mem_size; + struct ufs_hba *hba = platform_get_drvdata(pdev); + + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + + if (!irq_res) + dev_err(&pdev->dev, "ufshcd: IRQ resource not available\n"); + else + free_irq(irq_res->start, 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 struct platform_driver ufshcd_pltfrm_driver = { + .probe = ufshcd_pltfrm_probe, + .remove = __devexit_p(ufshcd_pltfrm_remove), +#ifdef CONFIG_PM + .suspend = ufshcd_pltfrm_suspend, + .resume = ufshcd_pltfrm_resume, +#endif + .driver = { + .name = "ufshcd", + .owner = THIS_MODULE, + .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("Platform based UFS host controller 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
