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/*
* (C) Copyright 2010-2014
* NVIDIA Corporation <www.nvidia.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _TEGRA_PINMUX_H_
#define _TEGRA_PINMUX_H_
#include <asm/arch/tegra.h>
/* The pullup/pulldown state of a pin group */
enum pmux_pull {
PMUX_PULL_NORMAL = 0,
PMUX_PULL_DOWN,
PMUX_PULL_UP,
};
/* Defines whether a pin group is tristated or in normal operation */
enum pmux_tristate {
PMUX_TRI_NORMAL = 0,
PMUX_TRI_TRISTATE = 1,
};
#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
enum pmux_pin_io {
PMUX_PIN_OUTPUT = 0,
PMUX_PIN_INPUT = 1,
PMUX_PIN_NONE,
};
enum pmux_pin_lock {
PMUX_PIN_LOCK_DEFAULT = 0,
PMUX_PIN_LOCK_DISABLE,
PMUX_PIN_LOCK_ENABLE,
};
enum pmux_pin_od {
PMUX_PIN_OD_DEFAULT = 0,
PMUX_PIN_OD_DISABLE,
PMUX_PIN_OD_ENABLE,
};
enum pmux_pin_ioreset {
PMUX_PIN_IO_RESET_DEFAULT = 0,
PMUX_PIN_IO_RESET_DISABLE,
PMUX_PIN_IO_RESET_ENABLE,
};
#ifdef TEGRA_PMX_HAS_RCV_SEL
enum pmux_pin_rcv_sel {
PMUX_PIN_RCV_SEL_DEFAULT = 0,
PMUX_PIN_RCV_SEL_NORMAL,
PMUX_PIN_RCV_SEL_HIGH,
};
#endif /* TEGRA_PMX_HAS_RCV_SEL */
#endif /* TEGRA_PMX_HAS_PIN_IO_BIT_ETC */
/*
* This defines the configuration for a pin, including the function assigned,
* pull up/down settings and tristate settings. Having set up one of these
* you can call pinmux_config_pingroup() to configure a pin in one step. Also
* available is pinmux_config_table() to configure a list of pins.
*/
struct pingroup_config {
enum pmux_pingrp pingroup; /* pin group PINGRP_... */
enum pmux_func func; /* function to assign FUNC_... */
enum pmux_pull pull; /* pull up/down/normal PMUX_PULL_...*/
enum pmux_tristate tristate; /* tristate or normal PMUX_TRI_... */
#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
enum pmux_pin_io io; /* input or output PMUX_PIN_... */
enum pmux_pin_lock lock; /* lock enable/disable PMUX_PIN... */
enum pmux_pin_od od; /* open-drain or push-pull driver */
enum pmux_pin_ioreset ioreset; /* input/output reset PMUX_PIN... */
#ifdef TEGRA_PMX_HAS_RCV_SEL
enum pmux_pin_rcv_sel rcv_sel; /* select between High and Normal */
/* VIL/VIH receivers */
#endif
#endif
};
/* Set the mux function for a pin group */
void pinmux_set_func(enum pmux_pingrp pin, enum pmux_func func);
/* Set the pull up/down feature for a pin group */
void pinmux_set_pullupdown(enum pmux_pingrp pin, enum pmux_pull pupd);
/* Set a pin group to tristate */
void pinmux_tristate_enable(enum pmux_pingrp pin);
/* Set a pin group to normal (non tristate) */
void pinmux_tristate_disable(enum pmux_pingrp pin);
#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
/* Set a pin group as input or output */
void pinmux_set_io(enum pmux_pingrp pin, enum pmux_pin_io io);
#endif
/**
* Configure a list of pin groups
*
* @param config List of config items
* @param len Number of config items in list
*/
void pinmux_config_table(const struct pingroup_config *config, int len);
#ifdef TEGRA_PMX_HAS_PADGRPS
#define PGRP_SLWF_MIN 0
#define PGRP_SLWF_MAX 3
#define PGRP_SLWF_NONE -1
#define PGRP_SLWR_MIN 0
#define PGRP_SLWR_MAX 3
#define PGRP_SLWR_NONE -1
#define PGRP_DRVUP_MIN 0
#define PGRP_DRVUP_MAX 127
#define PGRP_DRVUP_NONE -1
#define PGRP_DRVDN_MIN 0
#define PGRP_DRVDN_MAX 127
#define PGRP_DRVDN_NONE -1
/* Defines a pin group cfg's low-power mode select */
enum pgrp_lpmd {
PGRP_LPMD_X8 = 0,
PGRP_LPMD_X4,
PGRP_LPMD_X2,
PGRP_LPMD_X,
PGRP_LPMD_NONE = -1,
};
/* Defines whether a pin group cfg's schmidt is enabled or not */
enum pgrp_schmt {
PGRP_SCHMT_DISABLE = 0,
PGRP_SCHMT_ENABLE = 1,
PGRP_SCHMT_NONE = -1,
};
/* Defines whether a pin group cfg's high-speed mode is enabled or not */
enum pgrp_hsm {
PGRP_HSM_DISABLE = 0,
PGRP_HSM_ENABLE = 1,
PGRP_HSM_NONE = -1,
};
/*
* This defines the configuration for a pin group's pad control config
*/
struct padctrl_config {
enum pdrive_pingrp padgrp; /* pin group PDRIVE_PINGRP_x */
int slwf; /* falling edge slew */
int slwr; /* rising edge slew */
int drvup; /* pull-up drive strength */
int drvdn; /* pull-down drive strength */
enum pgrp_lpmd lpmd; /* low-power mode selection */
enum pgrp_schmt schmt; /* schmidt enable */
enum pgrp_hsm hsm; /* high-speed mode enable */
};
/**
* Set the GP pad configs
*
* @param config List of config items
* @param len Number of config items in list
*/
void padgrp_config_table(const struct padctrl_config *config, int len);
#endif /* TEGRA_PMX_HAS_PADGRPS */
struct tegra_pingroup_desc {
enum pmux_func funcs[4];
#if defined(CONFIG_TEGRA20)
u32 ctl_id;
u32 pull_id;
#endif /* CONFIG_TEGRA20 */
};
extern const struct tegra_pingroup_desc *tegra_soc_pingroups;
#endif /* _TEGRA_PINMUX_H_ */
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