diff options
Diffstat (limited to 'arch/arm/include/asm/arch-tegra/pinmux.h')
-rw-r--r-- | arch/arm/include/asm/arch-tegra/pinmux.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-tegra/pinmux.h b/arch/arm/include/asm/arch-tegra/pinmux.h new file mode 100644 index 0000000..e97fffd --- /dev/null +++ b/arch/arm/include/asm/arch-tegra/pinmux.h @@ -0,0 +1,189 @@ +/* + * (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 or normal */ +void pinmux_set_tristate(enum pmux_pingrp pin, int enable); + +/* 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 + +/* Set the complete configuration for a pin group */ +void pinmux_config_pingroup(const struct pingroup_config *config); + +/** + * 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_ */ |