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+/*
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+ * Universal Flash Storage Host controller Platform bus based glue driver
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+ *
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+ * This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c
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+ * Copyright (C) 2011-2013 Samsung India Software Operations
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+ *
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+ * Authors:
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+ * Santosh Yaraganavi <santosh.sy@samsung.com>
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+ * Vinayak Holikatti <h.vinayak@samsung.com>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version 2
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+ * of the License, or (at your option) any later version.
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+ * See the COPYING file in the top-level directory or visit
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+ * <http://www.gnu.org/licenses/gpl-2.0.html>
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * This program is provided "AS IS" and "WITH ALL FAULTS" and
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+ * without warranty of any kind. You are solely responsible for
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+ * determining the appropriateness of using and distributing
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+ * the program and assume all risks associated with your exercise
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+ * of rights with respect to the program, including but not limited
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+ * to infringement of third party rights, the risks and costs of
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+ * program errors, damage to or loss of data, programs or equipment,
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+ * and unavailability or interruption of operations. Under no
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+ * circumstances will the contributor of this Program be liable for
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+ * any damages of any kind arising from your use or distribution of
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+ * this program.
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+ */
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+
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+#include "ufshcd.h"
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+#include <linux/platform_device.h>
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+
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+#ifdef CONFIG_PM
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+/**
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+ * ufshcd_pltfrm_suspend - suspend power management function
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+ * @dev: pointer to device handle
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+ *
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+ *
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+ * Returns 0
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+ */
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+static int ufshcd_pltfrm_suspend(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct ufs_hba *hba = platform_get_drvdata(pdev);
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+
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+ /*
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+ * TODO:
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+ * 1. Call ufshcd_suspend
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+ * 2. Do bus specific power management
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+ */
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+
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+ disable_irq(hba->irq);
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+
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+ return 0;
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+}
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+
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+/**
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+ * ufshcd_pltfrm_resume - resume power management function
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+ * @dev: pointer to device handle
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+ *
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+ * Returns 0
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+ */
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+static int ufshcd_pltfrm_resume(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct ufs_hba *hba = platform_get_drvdata(pdev);
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+
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+ /*
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+ * TODO:
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+ * 1. Call ufshcd_resume.
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+ * 2. Do bus specific wake up
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+ */
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+
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+ enable_irq(hba->irq);
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+
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+ return 0;
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+}
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+#else
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+#define ufshcd_pltfrm_suspend NULL
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+#define ufshcd_pltfrm_resume NULL
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+#endif
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+
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+/**
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+ * ufshcd_pltfrm_probe - probe routine of the driver
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+ * @pdev: pointer to Platform device handle
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+ *
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+ * Returns 0 on success, non-zero value on failure
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+ */
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+static int ufshcd_pltfrm_probe(struct platform_device *pdev)
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+{
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+ struct ufs_hba *hba;
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+ void __iomem *mmio_base;
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+ struct resource *mem_res;
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+ struct resource *irq_res;
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+ resource_size_t mem_size;
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+ int err;
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+ struct device *dev = &pdev->dev;
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+
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+ mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (!mem_res) {
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+ dev_err(&pdev->dev,
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+ "Memory resource not available\n");
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+ err = -ENODEV;
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+ goto out_error;
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+ }
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+
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+ mem_size = resource_size(mem_res);
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+ if (!request_mem_region(mem_res->start, mem_size, "ufshcd")) {
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+ dev_err(&pdev->dev,
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+ "Cannot reserve the memory resource\n");
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+ err = -EBUSY;
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+ goto out_error;
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+ }
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+
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+ mmio_base = ioremap_nocache(mem_res->start, mem_size);
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+ if (!mmio_base) {
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+ dev_err(&pdev->dev, "memory map failed\n");
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+ err = -ENOMEM;
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+ goto out_release_regions;
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+ }
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+
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+ irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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+ if (!irq_res) {
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+ dev_err(&pdev->dev, "IRQ resource not available\n");
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+ err = -ENODEV;
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+ goto out_iounmap;
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+ }
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+
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+ err = dma_set_coherent_mask(dev, dev->coherent_dma_mask);
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+ if (err) {
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+ dev_err(&pdev->dev, "set dma mask failed\n");
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+ goto out_iounmap;
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+ }
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+
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+ err = ufshcd_init(&pdev->dev, &hba, mmio_base, irq_res->start);
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+ if (err) {
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+ dev_err(&pdev->dev, "Intialization failed\n");
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+ goto out_iounmap;
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+ }
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+
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+ platform_set_drvdata(pdev, hba);
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+
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+ return 0;
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+
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+out_iounmap:
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+ iounmap(mmio_base);
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+out_release_regions:
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+ release_mem_region(mem_res->start, mem_size);
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+out_error:
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+ return err;
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+}
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+
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+/**
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+ * ufshcd_pltfrm_remove - remove platform driver routine
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+ * @pdev: pointer to platform device handle
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+ *
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+ * Returns 0 on success, non-zero value on failure
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+ */
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+static int ufshcd_pltfrm_remove(struct platform_device *pdev)
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+{
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+ struct resource *mem_res;
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+ resource_size_t mem_size;
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+ struct ufs_hba *hba = platform_get_drvdata(pdev);
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+
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+ disable_irq(hba->irq);
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+
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+ /* Some buggy controllers raise interrupt after
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+ * the resources are removed. So first we unregister the
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+ * irq handler and then the resources used by driver
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+ */
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+
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+ free_irq(hba->irq, hba);
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+ ufshcd_remove(hba);
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+ mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (!mem_res)
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+ dev_err(&pdev->dev, "ufshcd: Memory resource not available\n");
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+ else {
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+ mem_size = resource_size(mem_res);
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+ release_mem_region(mem_res->start, mem_size);
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+ }
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+ platform_set_drvdata(pdev, NULL);
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+ return 0;
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+}
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+
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+static const struct of_device_id ufs_of_match[] = {
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+ { .compatible = "jedec,ufs-1.1"},
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+};
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+
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+static const struct dev_pm_ops ufshcd_dev_pm_ops = {
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+ .suspend = ufshcd_pltfrm_suspend,
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+ .resume = ufshcd_pltfrm_resume,
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+};
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+
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+static struct platform_driver ufshcd_pltfrm_driver = {
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+ .probe = ufshcd_pltfrm_probe,
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+ .remove = ufshcd_pltfrm_remove,
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+ .driver = {
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+ .name = "ufshcd",
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+ .owner = THIS_MODULE,
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+ .pm = &ufshcd_dev_pm_ops,
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+ .of_match_table = ufs_of_match,
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+ },
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+};
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+
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+module_platform_driver(ufshcd_pltfrm_driver);
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+
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+MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
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+MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
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+MODULE_DESCRIPTION("UFS host controller Pltform bus based glue driver");
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+MODULE_LICENSE("GPL");
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+MODULE_VERSION(UFSHCD_DRIVER_VERSION);
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