linux/drivers/ufs/host/cdns-pltfrm.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Platform UFS Host driver for Cadence controller
 *
 * Copyright (C) 2018 Cadence Design Systems, Inc.
 *
 * Authors:
 *	Jan Kotas <[email protected]>
 *
 */

#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/time.h>

#include "ufshcd-pltfrm.h"

#define CDNS_UFS_REG_HCLKDIV …
#define CDNS_UFS_REG_PHY_XCFGD1 …
#define CDNS_UFS_MAX_L4_ATTRS …

struct cdns_ufs_host { … };

/**
 * cdns_ufs_get_l4_attr - get L4 attributes on local side
 * @hba: per adapter instance
 *
 */
static void cdns_ufs_get_l4_attr(struct ufs_hba *hba)
{ … }

/**
 * cdns_ufs_set_l4_attr - set L4 attributes on local side
 * @hba: per adapter instance
 *
 */
static void cdns_ufs_set_l4_attr(struct ufs_hba *hba)
{ … }

/**
 * cdns_ufs_set_hclkdiv() - set HCLKDIV register value based on the core_clk.
 * @hba: host controller instance
 *
 * Return: zero for success and non-zero for failure.
 */
static int cdns_ufs_set_hclkdiv(struct ufs_hba *hba)
{ … }

/**
 * cdns_ufs_hce_enable_notify() - set HCLKDIV register
 * @hba: host controller instance
 * @status: notify stage (pre, post change)
 *
 * Return: zero for success and non-zero for failure.
 */
static int cdns_ufs_hce_enable_notify(struct ufs_hba *hba,
				      enum ufs_notify_change_status status)
{ … }

/**
 * cdns_ufs_hibern8_notify() - save and restore L4 attributes.
 * @hba: host controller instance
 * @cmd: UIC Command
 * @status: notify stage (pre, post change)
 */
static void cdns_ufs_hibern8_notify(struct ufs_hba *hba, enum uic_cmd_dme cmd,
				    enum ufs_notify_change_status status)
{ … }

/**
 * cdns_ufs_link_startup_notify() - handle link startup.
 * @hba: host controller instance
 * @status: notify stage (pre, post change)
 *
 * Return: zero for success and non-zero for failure.
 */
static int cdns_ufs_link_startup_notify(struct ufs_hba *hba,
					enum ufs_notify_change_status status)
{ … }

/**
 * cdns_ufs_init - performs additional ufs initialization
 * @hba: host controller instance
 *
 * Return: status of initialization.
 */
static int cdns_ufs_init(struct ufs_hba *hba)
{ … }

/**
 * cdns_ufs_m31_16nm_phy_initialization - performs m31 phy initialization
 * @hba: host controller instance
 *
 * Return: 0 (success).
 */
static int cdns_ufs_m31_16nm_phy_initialization(struct ufs_hba *hba)
{ … }

static const struct ufs_hba_variant_ops cdns_ufs_pltfm_hba_vops = …;

static const struct ufs_hba_variant_ops cdns_ufs_m31_16nm_pltfm_hba_vops = …;

static const struct of_device_id cdns_ufs_of_match[] = …;

MODULE_DEVICE_TABLE(of, cdns_ufs_of_match);

/**
 * cdns_ufs_pltfrm_probe - probe routine of the driver
 * @pdev: pointer to platform device handle
 *
 * Return: zero for success and non-zero for failure.
 */
static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
{ … }

/**
 * cdns_ufs_pltfrm_remove - removes the ufs driver
 * @pdev: pointer to platform device handle
 *
 * Return: 0 (success).
 */
static void cdns_ufs_pltfrm_remove(struct platform_device *pdev)
{ … }

static const struct dev_pm_ops cdns_ufs_dev_pm_ops = …;

static struct platform_driver cdns_ufs_pltfrm_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;