216 lines
6.9 KiB
C
216 lines
6.9 KiB
C
/*
|
|
* Marvell MVEBU pinctrl driver
|
|
*
|
|
* Authors: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
|
|
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef __PINCTRL_MVEBU_H__
|
|
#define __PINCTRL_MVEBU_H__
|
|
|
|
/**
|
|
* struct mvebu_mpp_ctrl_data - private data for the mpp ctrl operations
|
|
* @base: base address of pinctrl hardware
|
|
* @regmap.map: regmap structure
|
|
* @regmap.offset: regmap offset
|
|
*/
|
|
struct mvebu_mpp_ctrl_data {
|
|
union {
|
|
void __iomem *base;
|
|
struct {
|
|
struct regmap *map;
|
|
u32 offset;
|
|
} regmap;
|
|
};
|
|
};
|
|
|
|
/**
|
|
* struct mvebu_mpp_ctrl - describe a mpp control
|
|
* @name: name of the control group
|
|
* @pid: first pin id handled by this control
|
|
* @npins: number of pins controlled by this control
|
|
* @mpp_get: (optional) special function to get mpp setting
|
|
* @mpp_set: (optional) special function to set mpp setting
|
|
* @mpp_gpio_req: (optional) special function to request gpio
|
|
* @mpp_gpio_dir: (optional) special function to set gpio direction
|
|
*
|
|
* A mpp_ctrl describes a muxable unit, e.g. pin, group of pins, or
|
|
* internal function, inside the SoC. Each muxable unit can be switched
|
|
* between two or more different settings, e.g. assign mpp pin 13 to
|
|
* uart1 or sata.
|
|
*
|
|
* The mpp_get/_set functions are mandatory and are used to get/set a
|
|
* specific mode. The optional mpp_gpio_req/_dir functions can be used
|
|
* to allow pin settings with varying gpio pins.
|
|
*/
|
|
struct mvebu_mpp_ctrl {
|
|
const char *name;
|
|
u8 pid;
|
|
u8 npins;
|
|
unsigned *pins;
|
|
int (*mpp_get)(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
unsigned long *config);
|
|
int (*mpp_set)(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
unsigned long config);
|
|
int (*mpp_gpio_req)(struct mvebu_mpp_ctrl_data *data, unsigned pid);
|
|
int (*mpp_gpio_dir)(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
bool input);
|
|
};
|
|
|
|
/**
|
|
* struct mvebu_mpp_ctrl_setting - describe a mpp ctrl setting
|
|
* @val: ctrl setting value
|
|
* @name: ctrl setting name, e.g. uart2, spi0 - unique per mpp_mode
|
|
* @subname: (optional) additional ctrl setting name, e.g. rts, cts
|
|
* @variant: (optional) variant identifier mask
|
|
* @flags: (private) flags to store gpi/gpo/gpio capabilities
|
|
*
|
|
* A ctrl_setting describes a specific internal mux function that a mpp pin
|
|
* can be switched to. The value (val) will be written in the corresponding
|
|
* register for common mpp pin configuration registers on MVEBU. SoC specific
|
|
* mpp_get/_set function may use val to distinguish between different settings.
|
|
*
|
|
* The name will be used to switch to this setting in DT description, e.g.
|
|
* marvell,function = "uart2". subname is only for debugging purposes.
|
|
*
|
|
* If name is one of "gpi", "gpo", "gpio" gpio capabilities are
|
|
* parsed during initialization and stored in flags.
|
|
*
|
|
* The variant can be used to combine different revisions of one SoC to a
|
|
* common pinctrl driver. It is matched (AND) with variant of soc_info to
|
|
* determine if a setting is available on the current SoC revision.
|
|
*/
|
|
struct mvebu_mpp_ctrl_setting {
|
|
u8 val;
|
|
const char *name;
|
|
const char *subname;
|
|
u8 variant;
|
|
u8 flags;
|
|
#define MVEBU_SETTING_GPO (1 << 0)
|
|
#define MVEBU_SETTING_GPI (1 << 1)
|
|
};
|
|
|
|
/**
|
|
* struct mvebu_mpp_mode - link ctrl and settings
|
|
* @pid: first pin id handled by this mode
|
|
* @settings: list of settings available for this mode
|
|
*
|
|
* A mode connects all available settings with the corresponding mpp_ctrl
|
|
* given by pid.
|
|
*/
|
|
struct mvebu_mpp_mode {
|
|
u8 pid;
|
|
struct mvebu_mpp_ctrl_setting *settings;
|
|
};
|
|
|
|
/**
|
|
* struct mvebu_pinctrl_soc_info - SoC specific info passed to pinctrl-mvebu
|
|
* @variant: variant mask of soc_info
|
|
* @controls: list of available mvebu_mpp_ctrls
|
|
* @control_data: optional array, one entry for each control
|
|
* @ncontrols: number of available mvebu_mpp_ctrls
|
|
* @modes: list of available mvebu_mpp_modes
|
|
* @nmodes: number of available mvebu_mpp_modes
|
|
* @gpioranges: list of pinctrl_gpio_ranges
|
|
* @ngpioranges: number of available pinctrl_gpio_ranges
|
|
*
|
|
* This struct describes all pinctrl related information for a specific SoC.
|
|
* If variant is unequal 0 it will be matched (AND) with variant of each
|
|
* setting and allows to distinguish between different revisions of one SoC.
|
|
*/
|
|
struct mvebu_pinctrl_soc_info {
|
|
u8 variant;
|
|
const struct mvebu_mpp_ctrl *controls;
|
|
struct mvebu_mpp_ctrl_data *control_data;
|
|
int ncontrols;
|
|
struct mvebu_mpp_mode *modes;
|
|
int nmodes;
|
|
struct pinctrl_gpio_range *gpioranges;
|
|
int ngpioranges;
|
|
};
|
|
|
|
#define MPP_FUNC_CTRL(_idl, _idh, _name, _func) \
|
|
{ \
|
|
.name = _name, \
|
|
.pid = _idl, \
|
|
.npins = _idh - _idl + 1, \
|
|
.pins = (unsigned[_idh - _idl + 1]) { }, \
|
|
.mpp_get = _func ## _get, \
|
|
.mpp_set = _func ## _set, \
|
|
.mpp_gpio_req = NULL, \
|
|
.mpp_gpio_dir = NULL, \
|
|
}
|
|
|
|
#define MPP_FUNC_GPIO_CTRL(_idl, _idh, _name, _func) \
|
|
{ \
|
|
.name = _name, \
|
|
.pid = _idl, \
|
|
.npins = _idh - _idl + 1, \
|
|
.pins = (unsigned[_idh - _idl + 1]) { }, \
|
|
.mpp_get = _func ## _get, \
|
|
.mpp_set = _func ## _set, \
|
|
.mpp_gpio_req = _func ## _gpio_req, \
|
|
.mpp_gpio_dir = _func ## _gpio_dir, \
|
|
}
|
|
|
|
#define _MPP_VAR_FUNCTION(_val, _name, _subname, _mask) \
|
|
{ \
|
|
.val = _val, \
|
|
.name = _name, \
|
|
.subname = _subname, \
|
|
.variant = _mask, \
|
|
.flags = 0, \
|
|
}
|
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
#define MPP_VAR_FUNCTION(_val, _name, _subname, _mask) \
|
|
_MPP_VAR_FUNCTION(_val, _name, _subname, _mask)
|
|
#else
|
|
#define MPP_VAR_FUNCTION(_val, _name, _subname, _mask) \
|
|
_MPP_VAR_FUNCTION(_val, _name, NULL, _mask)
|
|
#endif
|
|
|
|
#define MPP_FUNCTION(_val, _name, _subname) \
|
|
MPP_VAR_FUNCTION(_val, _name, _subname, (u8)-1)
|
|
|
|
#define MPP_MODE(_id, ...) \
|
|
{ \
|
|
.pid = _id, \
|
|
.settings = (struct mvebu_mpp_ctrl_setting[]){ \
|
|
__VA_ARGS__, { } }, \
|
|
}
|
|
|
|
#define MPP_GPIO_RANGE(_id, _pinbase, _gpiobase, _npins) \
|
|
{ \
|
|
.name = "mvebu-gpio", \
|
|
.id = _id, \
|
|
.pin_base = _pinbase, \
|
|
.base = _gpiobase, \
|
|
.npins = _npins, \
|
|
}
|
|
|
|
#define MVEBU_MPPS_PER_REG 8
|
|
#define MVEBU_MPP_BITS 4
|
|
#define MVEBU_MPP_MASK 0xf
|
|
|
|
int mvebu_mmio_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
unsigned long *config);
|
|
int mvebu_mmio_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
unsigned long config);
|
|
int mvebu_regmap_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
unsigned long *config);
|
|
int mvebu_regmap_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data, unsigned pid,
|
|
unsigned long config);
|
|
|
|
int mvebu_pinctrl_probe(struct platform_device *pdev);
|
|
int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev);
|
|
int mvebu_pinctrl_simple_regmap_probe(struct platform_device *pdev,
|
|
struct device *syscon_dev);
|
|
|
|
#endif
|