/*
 * Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
 * Copyright (c) 2015, Google Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#ifndef __PHY_TEGRA_XUSB_H
#define __PHY_TEGRA_XUSB_H

#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>

/* legacy entry points for backwards-compatibility */
int tegra_xusb_padctl_legacy_probe(struct platform_device *pdev);
int tegra_xusb_padctl_legacy_remove(struct platform_device *pdev);

struct phy;
struct phy_provider;
struct platform_device;
struct regulator;

/*
 * lanes
 */
struct tegra_xusb_lane_soc {
        const char *name;

        unsigned int offset;
        unsigned int shift;
        unsigned int mask;

        const char * const *funcs;
        unsigned int num_funcs;
};

struct tegra_xusb_lane {
        const struct tegra_xusb_lane_soc *soc;
        struct tegra_xusb_pad *pad;
        struct device_node *np;
        struct list_head list;
        unsigned int function;
        unsigned int index;
};

int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
                             struct device_node *np);

struct tegra_xusb_usb2_lane {
        struct tegra_xusb_lane base;

        u32 hs_curr_level_offset;
};

static inline struct tegra_xusb_usb2_lane *
to_usb2_lane(struct tegra_xusb_lane *lane)
{
        return container_of(lane, struct tegra_xusb_usb2_lane, base);
}

struct tegra_xusb_ulpi_lane {
        struct tegra_xusb_lane base;
};

static inline struct tegra_xusb_ulpi_lane *
to_ulpi_lane(struct tegra_xusb_lane *lane)
{
        return container_of(lane, struct tegra_xusb_ulpi_lane, base);
}

struct tegra_xusb_hsic_lane {
        struct tegra_xusb_lane base;

        u32 strobe_trim;
        u32 rx_strobe_trim;
        u32 rx_data_trim;
        u32 tx_rtune_n;
        u32 tx_rtune_p;
        u32 tx_rslew_n;
        u32 tx_rslew_p;
        bool auto_term;
};

static inline struct tegra_xusb_hsic_lane *
to_hsic_lane(struct tegra_xusb_lane *lane)
{
        return container_of(lane, struct tegra_xusb_hsic_lane, base);
}

struct tegra_xusb_pcie_lane {
        struct tegra_xusb_lane base;
};

static inline struct tegra_xusb_pcie_lane *
to_pcie_lane(struct tegra_xusb_lane *lane)
{
        return container_of(lane, struct tegra_xusb_pcie_lane, base);
}

struct tegra_xusb_sata_lane {
        struct tegra_xusb_lane base;
};

static inline struct tegra_xusb_sata_lane *
to_sata_lane(struct tegra_xusb_lane *lane)
{
        return container_of(lane, struct tegra_xusb_sata_lane, base);
}

struct tegra_xusb_lane_ops {
        struct tegra_xusb_lane *(*probe)(struct tegra_xusb_pad *pad,
                                         struct device_node *np,
                                         unsigned int index);
        void (*remove)(struct tegra_xusb_lane *lane);
};

/*
 * pads
 */
struct tegra_xusb_pad_soc;
struct tegra_xusb_padctl;

struct tegra_xusb_pad_ops {
        struct tegra_xusb_pad *(*probe)(struct tegra_xusb_padctl *padctl,
                                        const struct tegra_xusb_pad_soc *soc,
                                        struct device_node *np);
        void (*remove)(struct tegra_xusb_pad *pad);
};

struct tegra_xusb_pad_soc {
        const char *name;

        const struct tegra_xusb_lane_soc *lanes;
        unsigned int num_lanes;

        const struct tegra_xusb_pad_ops *ops;
};

struct tegra_xusb_pad {
        const struct tegra_xusb_pad_soc *soc;
        struct tegra_xusb_padctl *padctl;
        struct phy_provider *provider;
        struct phy **lanes;
        struct device dev;

        const struct tegra_xusb_lane_ops *ops;

        struct list_head list;
};

static inline struct tegra_xusb_pad *to_tegra_xusb_pad(struct device *dev)
{
        return container_of(dev, struct tegra_xusb_pad, dev);
}

int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
                        struct tegra_xusb_padctl *padctl,
                        struct device_node *np);
int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
                            const struct phy_ops *ops);
void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad);

struct tegra_xusb_usb2_pad {
        struct tegra_xusb_pad base;

        struct clk *clk;
        unsigned int enable;
        struct mutex lock;
};

static inline struct tegra_xusb_usb2_pad *
to_usb2_pad(struct tegra_xusb_pad *pad)
{
        return container_of(pad, struct tegra_xusb_usb2_pad, base);
}

struct tegra_xusb_ulpi_pad {
        struct tegra_xusb_pad base;
};

static inline struct tegra_xusb_ulpi_pad *
to_ulpi_pad(struct tegra_xusb_pad *pad)
{
        return container_of(pad, struct tegra_xusb_ulpi_pad, base);
}

struct tegra_xusb_hsic_pad {
        struct tegra_xusb_pad base;

        struct regulator *supply;
        struct clk *clk;
};

static inline struct tegra_xusb_hsic_pad *
to_hsic_pad(struct tegra_xusb_pad *pad)
{
        return container_of(pad, struct tegra_xusb_hsic_pad, base);
}

struct tegra_xusb_pcie_pad {
        struct tegra_xusb_pad base;

        struct reset_control *rst;
        struct clk *pll;

        unsigned int enable;
};

static inline struct tegra_xusb_pcie_pad *
to_pcie_pad(struct tegra_xusb_pad *pad)
{
        return container_of(pad, struct tegra_xusb_pcie_pad, base);
}

struct tegra_xusb_sata_pad {
        struct tegra_xusb_pad base;

        struct reset_control *rst;
        struct clk *pll;

        unsigned int enable;
};

static inline struct tegra_xusb_sata_pad *
to_sata_pad(struct tegra_xusb_pad *pad)
{
        return container_of(pad, struct tegra_xusb_sata_pad, base);
}

/*
 * ports
 */
struct tegra_xusb_port_ops;

struct tegra_xusb_port {
        struct tegra_xusb_padctl *padctl;
        struct tegra_xusb_lane *lane;
        unsigned int index;

        struct list_head list;
        struct device dev;

        const struct tegra_xusb_port_ops *ops;
};

struct tegra_xusb_lane_map {
        unsigned int port;
        const char *type;
        unsigned int index;
        const char *func;
};

struct tegra_xusb_lane *
tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
                          const struct tegra_xusb_lane_map *map,
                          const char *function);

struct tegra_xusb_port *
tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
                     unsigned int index);

struct tegra_xusb_usb2_port {
        struct tegra_xusb_port base;

        struct regulator *supply;
        bool internal;
};

static inline struct tegra_xusb_usb2_port *
to_usb2_port(struct tegra_xusb_port *port)
{
        return container_of(port, struct tegra_xusb_usb2_port, base);
}

struct tegra_xusb_usb2_port *
tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl,
                          unsigned int index);

struct tegra_xusb_ulpi_port {
        struct tegra_xusb_port base;

        struct regulator *supply;
        bool internal;
};

static inline struct tegra_xusb_ulpi_port *
to_ulpi_port(struct tegra_xusb_port *port)
{
        return container_of(port, struct tegra_xusb_ulpi_port, base);
}

struct tegra_xusb_hsic_port {
        struct tegra_xusb_port base;
};

static inline struct tegra_xusb_hsic_port *
to_hsic_port(struct tegra_xusb_port *port)
{
        return container_of(port, struct tegra_xusb_hsic_port, base);
}

struct tegra_xusb_usb3_port {
        struct tegra_xusb_port base;
        struct regulator *supply;
        bool context_saved;
        unsigned int port;
        bool internal;

        u32 tap1;
        u32 amp;
        u32 ctle_z;
        u32 ctle_g;
};

static inline struct tegra_xusb_usb3_port *
to_usb3_port(struct tegra_xusb_port *port)
{
        return container_of(port, struct tegra_xusb_usb3_port, base);
}

struct tegra_xusb_usb3_port *
tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl,
                          unsigned int index);

struct tegra_xusb_port_ops {
        int (*enable)(struct tegra_xusb_port *port);
        void (*disable)(struct tegra_xusb_port *port);
        struct tegra_xusb_lane *(*map)(struct tegra_xusb_port *port);
};

/*
 * pad controller
 */
struct tegra_xusb_padctl_soc;

struct tegra_xusb_padctl_ops {
        struct tegra_xusb_padctl *
                (*probe)(struct device *dev,
                         const struct tegra_xusb_padctl_soc *soc);
        void (*remove)(struct tegra_xusb_padctl *padctl);

        int (*usb3_save_context)(struct tegra_xusb_padctl *padctl,
                                 unsigned int index);
        int (*hsic_set_idle)(struct tegra_xusb_padctl *padctl,
                             unsigned int index, bool idle);
        int (*usb3_set_lfps_detect)(struct tegra_xusb_padctl *padctl,
                                    unsigned int index, bool enable);
};

struct tegra_xusb_padctl_soc {
        const struct tegra_xusb_pad_soc * const *pads;
        unsigned int num_pads;

        struct {
                struct {
                        const struct tegra_xusb_port_ops *ops;
                        unsigned int count;
                } usb2, ulpi, hsic, usb3;
        } ports;

        const struct tegra_xusb_padctl_ops *ops;
};

struct tegra_xusb_padctl {
        struct device *dev;
        void __iomem *regs;
        struct mutex lock;
        struct reset_control *rst;

        const struct tegra_xusb_padctl_soc *soc;

        struct tegra_xusb_pad *pcie;
        struct tegra_xusb_pad *sata;
        struct tegra_xusb_pad *ulpi;
        struct tegra_xusb_pad *usb2;
        struct tegra_xusb_pad *hsic;

        struct list_head ports;
        struct list_head lanes;
        struct list_head pads;

        unsigned int enable;

        struct clk *clk;
};

static inline void padctl_writel(struct tegra_xusb_padctl *padctl, u32 value,
                                 unsigned long offset)
{
        dev_dbg(padctl->dev, "%08lx < %08x\n", offset, value);
        writel(value, padctl->regs + offset);
}

static inline u32 padctl_readl(struct tegra_xusb_padctl *padctl,
                               unsigned long offset)
{
        u32 value = readl(padctl->regs + offset);
        dev_dbg(padctl->dev, "%08lx > %08x\n", offset, value);
        return value;
}

struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
                                             const char *name,
                                             unsigned int index);

#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
extern const struct tegra_xusb_padctl_soc tegra124_xusb_padctl_soc;
#endif
#if defined(CONFIG_ARCH_TEGRA_210_SOC)
extern const struct tegra_xusb_padctl_soc tegra210_xusb_padctl_soc;
#endif

#endif /* __PHY_TEGRA_XUSB_H */