/*
 * Machine interface for the pinctrl subsystem.
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 * Based on bits of regulator core, gpio core and clk core
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 *
 * License terms: GNU General Public License (GPL) version 2
 */
#ifndef __LINUX_PINCTRL_MACHINE_H
#define __LINUX_PINCTRL_MACHINE_H

#include <linux/bug.h>

#include <linux/pinctrl/pinctrl-state.h>

enum pinctrl_map_type {
        PIN_MAP_TYPE_INVALID,
        PIN_MAP_TYPE_DUMMY_STATE,
        PIN_MAP_TYPE_MUX_GROUP,
        PIN_MAP_TYPE_CONFIGS_PIN,
        PIN_MAP_TYPE_CONFIGS_GROUP,
};

/**
 * struct pinctrl_map_mux - mapping table content for MAP_TYPE_MUX_GROUP
 * @group: the name of the group whose mux function is to be configured. This
 *      field may be left NULL, and the first applicable group for the function
 *      will be used.
 * @function: the mux function to select for the group
 */
struct pinctrl_map_mux {
        const char *group;
        const char *function;
};

/**
 * struct pinctrl_map_configs - mapping table content for MAP_TYPE_CONFIGS_*
 * @group_or_pin: the name of the pin or group whose configuration parameters
 *      are to be configured.
 * @configs: a pointer to an array of config parameters/values to program into
 *      hardware. Each individual pin controller defines the format and meaning
 *      of config parameters.
 * @num_configs: the number of entries in array @configs
 */
struct pinctrl_map_configs {
        const char *group_or_pin;
        unsigned long *configs;
        unsigned num_configs;
};

/**
 * struct pinctrl_map - boards/machines shall provide this map for devices
 * @dev_name: the name of the device using this specific mapping, the name
 *      must be the same as in your struct device*. If this name is set to the
 *      same name as the pin controllers own dev_name(), the map entry will be
 *      hogged by the driver itself upon registration
 * @name: the name of this specific map entry for the particular machine.
 *      This is the parameter passed to pinmux_lookup_state()
 * @type: the type of mapping table entry
 * @ctrl_dev_name: the name of the device controlling this specific mapping,
 *      the name must be the same as in your struct device*. This field is not
 *      used for PIN_MAP_TYPE_DUMMY_STATE
 * @data: Data specific to the mapping type
 */
struct pinctrl_map {
        const char *dev_name;
        const char *name;
        enum pinctrl_map_type type;
        const char *ctrl_dev_name;
        union {
                struct pinctrl_map_mux mux;
                struct pinctrl_map_configs configs;
        } data;
};

/* Convenience macros to create mapping table entries */

#define PIN_MAP_DUMMY_STATE(dev, state) \
        {                                                               \
                .dev_name = dev,                                        \
                .name = state,                                          \
                .type = PIN_MAP_TYPE_DUMMY_STATE,                       \
        }

#define PIN_MAP_MUX_GROUP(dev, state, pinctrl, grp, func)               \
        {                                                               \
                .dev_name = dev,                                        \
                .name = state,                                          \
                .type = PIN_MAP_TYPE_MUX_GROUP,                         \
                .ctrl_dev_name = pinctrl,                               \
                .data.mux = {                                           \
                        .group = grp,                                   \
                        .function = func,                               \
                },                                                      \
        }

#define PIN_MAP_MUX_GROUP_DEFAULT(dev, pinctrl, grp, func)              \
        PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, func)

#define PIN_MAP_MUX_GROUP_HOG(dev, state, grp, func)                    \
        PIN_MAP_MUX_GROUP(dev, state, dev, grp, func)

#define PIN_MAP_MUX_GROUP_HOG_DEFAULT(dev, grp, func)                   \
        PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, func)

#define PIN_MAP_CONFIGS_PIN(dev, state, pinctrl, pin, cfgs)             \
        {                                                               \
                .dev_name = dev,                                        \
                .name = state,                                          \
                .type = PIN_MAP_TYPE_CONFIGS_PIN,                       \
                .ctrl_dev_name = pinctrl,                               \
                .data.configs = {                                       \
                        .group_or_pin = pin,                            \
                        .configs = cfgs,                                \
                        .num_configs = ARRAY_SIZE(cfgs),                \
                },                                                      \
        }

#define PIN_MAP_CONFIGS_PIN_DEFAULT(dev, pinctrl, pin, cfgs)            \
        PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, pinctrl, pin, cfgs)

#define PIN_MAP_CONFIGS_PIN_HOG(dev, state, pin, cfgs)                  \
        PIN_MAP_CONFIGS_PIN(dev, state, dev, pin, cfgs)

#define PIN_MAP_CONFIGS_PIN_HOG_DEFAULT(dev, pin, cfgs)                 \
        PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, dev, pin, cfgs)

#define PIN_MAP_CONFIGS_GROUP(dev, state, pinctrl, grp, cfgs)           \
        {                                                               \
                .dev_name = dev,                                        \
                .name = state,                                          \
                .type = PIN_MAP_TYPE_CONFIGS_GROUP,                     \
                .ctrl_dev_name = pinctrl,                               \
                .data.configs = {                                       \
                        .group_or_pin = grp,                            \
                        .configs = cfgs,                                \
                        .num_configs = ARRAY_SIZE(cfgs),                \
                },                                                      \
        }

#define PIN_MAP_CONFIGS_GROUP_DEFAULT(dev, pinctrl, grp, cfgs)          \
        PIN_MAP_CONFIGS_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, cfgs)

#define PIN_MAP_CONFIGS_GROUP_HOG(dev, state, grp, cfgs)                \
        PIN_MAP_CONFIGS_GROUP(dev, state, dev, grp, cfgs)

#define PIN_MAP_CONFIGS_GROUP_HOG_DEFAULT(dev, grp, cfgs)               \
        PIN_MAP_CONFIGS_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, cfgs)

#ifdef CONFIG_PINCTRL

extern int pinctrl_register_mappings(const struct pinctrl_map *map,
                                unsigned num_maps);
extern void pinctrl_provide_dummies(void);
#else

static inline int pinctrl_register_mappings(const struct pinctrl_map *map,
                                           unsigned num_maps)
{
        return 0;
}

static inline void pinctrl_provide_dummies(void)
{
}
#endif /* !CONFIG_PINCTRL */
#endif