ufs: add TC G210 platform driver

* Universal Flash Storage (UFS) DesignWare Host Controller

DWC_UFS nodes are defined to describe on-chip UFS host controllers and MPHY.

Each UFS controller instance should have its own node.

Required properties:

- compatible	: compatible list must contain the PHY type & version:

			"snps,g210-tc-6.00-20bit"

			"snps,g210-tc-6.00-40bit"

		  complemented with the Controller IP version:

			"snps,dwc-ufshcd-1.40a"

		  complemented with the JEDEC version:

			"jedec,ufs-1.1"

			"jedec,ufs-2.0"

- reg		: <registers mapping>

- interrupts	: <interrupt mapping for UFS host controller IRQ>

Example for a setup using a 1.40a DWC Controller with a 6.00 G210 40-bit TC:

	dwc-ufs@d0000000 {

		compatible = "snps,g210-tc-6.00-40bit",

			     "snps,dwc-ufshcd-1.40a",

			     "jedec,ufs-2.0";

		reg = < 0xd0000000 0x10000 >;

		interrupts = < 24 >;

	};

	  If unsure, say N.

config SCSI_UFS_DWC_TC_PLATFORM

	tristate "DesignWare platform support using a G210 Test Chip"

	depends on SCSI_UFSHCD_PLATFORM

	---help---

	  Synopsys Test Chip is a PHY for prototyping purposes.

	  If unsure, say N.

config SCSI_UFS_QCOM

	tristate "QCOM specific hooks to UFS controller platform driver"

	depends on SCSI_UFSHCD_PLATFORM && ARCH_QCOM

# UFSHCD makefile

obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-dwc-g210.o

obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o

obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o

obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o

/*

 * Synopsys G210 Test Chip driver

 *

 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)

 *

 * Authors: Joao Pinto <jpinto@synopsys.com>

 *

 * 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/kernel.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/delay.h>

#include "ufshcd-pltfrm.h"

#include "ufshcd-dwc.h"

#include "tc-dwc-g210.h"

/**

 * UFS DWC specific variant operations

 */

static struct ufs_hba_variant_ops tc_dwc_g210_20bit_pltfm_hba_vops = {

	.name                   = "tc-dwc-g210-pltfm",

	.link_startup_notify	= ufshcd_dwc_link_startup_notify,

	.phy_initialization = tc_dwc_g210_config_20_bit,

};

static struct ufs_hba_variant_ops tc_dwc_g210_40bit_pltfm_hba_vops = {

	.name                   = "tc-dwc-g210-pltfm",

	.link_startup_notify	= ufshcd_dwc_link_startup_notify,

	.phy_initialization = tc_dwc_g210_config_40_bit,

};

static const struct of_device_id tc_dwc_g210_pltfm_match[] = {

	{

		.compatible = "snps,g210-tc-6.00-20bit",

		.data = &tc_dwc_g210_20bit_pltfm_hba_vops,

	},

	{

		.compatible = "snps,g210-tc-6.00-40bit",

		.data = &tc_dwc_g210_40bit_pltfm_hba_vops,

	},

	{ },

};

MODULE_DEVICE_TABLE(of, tc_dwc_g210_pltfm_match);

/**

 * tc_dwc_g210_pltfm_probe()

 * @pdev: pointer to platform device structure

 *

 */

static int tc_dwc_g210_pltfm_probe(struct platform_device *pdev)

{

	int err;

	const struct of_device_id *of_id;

	struct ufs_hba_variant_ops *vops;

	struct device *dev = &pdev->dev;

	of_id = of_match_node(tc_dwc_g210_pltfm_match, dev->of_node);

	vops = (struct ufs_hba_variant_ops *)of_id->data;

	/* Perform generic probe */

	err = ufshcd_pltfrm_init(pdev, vops);

	if (err)

		dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);

	return err;

}

/**

 * tc_dwc_g210_pltfm_remove()

 * @pdev: pointer to platform device structure

 *

 */

static int tc_dwc_g210_pltfm_remove(struct platform_device *pdev)

{

	struct ufs_hba *hba =  platform_get_drvdata(pdev);

	pm_runtime_get_sync(&(pdev)->dev);

	ufshcd_remove(hba);

	return 0;

}

static const struct dev_pm_ops tc_dwc_g210_pltfm_pm_ops = {

	.suspend	= ufshcd_pltfrm_suspend,

	.resume		= ufshcd_pltfrm_resume,

	.runtime_suspend = ufshcd_pltfrm_runtime_suspend,

	.runtime_resume  = ufshcd_pltfrm_runtime_resume,

	.runtime_idle    = ufshcd_pltfrm_runtime_idle,

};

static struct platform_driver tc_dwc_g210_pltfm_driver = {

	.probe		= tc_dwc_g210_pltfm_probe,

	.remove		= tc_dwc_g210_pltfm_remove,

	.shutdown = ufshcd_pltfrm_shutdown,

	.driver		= {

		.name	= "tc-dwc-g210-pltfm",

		.pm	= &tc_dwc_g210_pltfm_pm_ops,

		.of_match_table	= of_match_ptr(tc_dwc_g210_pltfm_match),

	},

};

module_platform_driver(tc_dwc_g210_pltfm_driver);

MODULE_ALIAS("platform:tc-dwc-g210-pltfm");

MODULE_DESCRIPTION("Synopsys Test Chip G210 platform glue driver");

MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");

MODULE_LICENSE("Dual BSD/GPL");