153 lines
5.0 KiB
C
153 lines
5.0 KiB
C
/*
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* Copyright (c) 2022 ITE Technology Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_SOC_RISCV_ITE_IT8XXX2_COMMON_PINCTRL_SOC_H_
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#define ZEPHYR_SOC_RISCV_ITE_IT8XXX2_COMMON_PINCTRL_SOC_H_
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#include <zephyr/devicetree.h>
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#include <zephyr/dt-bindings/pinctrl/it8xxx2-pinctrl.h>
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#include <zephyr/types.h>
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/**
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* @brief ITE IT8XXX2 pin type.
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*/
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struct pinctrl_soc_pin {
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/* Pinmux control group */
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const struct device *pinctrls;
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/* Pin configuration (impedance, pullup/down, voltate selection, input). */
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uint32_t pincfg;
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/* GPIO pin */
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uint8_t pin;
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/* Alternate function */
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uint8_t alt_func;
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};
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typedef struct pinctrl_soc_pin pinctrl_soc_pin_t;
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/**
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* @brief PIN configuration bitfield.
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*
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* Pin configuration is coded with the following
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* fields.
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* Pin impedance config [ 0 ]
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* Pin pull-up/down config [ 4 : 5 ]
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* Pin voltage selection [ 8 ]
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* Pin input enable config [ 12 ]
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*/
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#define IT8XXX2_HIGH_IMPEDANCE 0x1U
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#define IT8XXX2_PULL_PIN_DEFAULT 0x0U
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#define IT8XXX2_PULL_UP 0x1U
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#define IT8XXX2_PULL_DOWN 0x2U
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#define IT8XXX2_VOLTAGE_3V3 0x0U
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#define IT8XXX2_VOLTAGE_1V8 0x1U
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#define IT8XXX2_INPUT_ENABLE 0x1U
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/* Pin tri-state mode. */
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#define IT8XXX2_IMPEDANCE_SHIFT 0U
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#define IT8XXX2_IMPEDANCE_MASK 0x1U
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/* Pin pull-up or pull-down */
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#define IT8XXX2_PUPDR_SHIFT 4U
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#define IT8XXX2_PUPDR_MASK 0x3U
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/* Pin 3.3V or 1.8V */
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#define IT8XXX2_VOLTAGE_SHIFT 8U
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#define IT8XXX2_VOLTAGE_MASK 0x1U
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/* Pin INPUT enable or disable */
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#define IT8XXX2_INPUT_SHIFT 12U
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#define IT8XXX2_INPUT_MASK 0x1U
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/**
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* @brief Utility macro to obtain configuration of tri-state.
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*/
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#define IT8XXX2_DT_PINCFG_IMPEDANCE(__mode) \
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(((__mode) >> IT8XXX2_IMPEDANCE_SHIFT) & IT8XXX2_IMPEDANCE_MASK)
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/**
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* @brief Utility macro to obtain configuration of pull-up or pull-down.
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*/
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#define IT8XXX2_DT_PINCFG_PUPDR(__mode) \
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(((__mode) >> IT8XXX2_PUPDR_SHIFT) & IT8XXX2_PUPDR_MASK)
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/**
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* @brief Utility macro to obtain input voltage selection.
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*/
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#define IT8XXX2_DT_PINCFG_VOLTAGE(__mode) \
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(((__mode) >> IT8XXX2_VOLTAGE_SHIFT) & IT8XXX2_VOLTAGE_MASK)
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/**
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* @brief Utility macro to obtain input enable.
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*/
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#define IT8XXX2_DT_PINCFG_INPUT(__mode) \
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(((__mode) >> IT8XXX2_INPUT_SHIFT) & IT8XXX2_INPUT_MASK)
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/**
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* @brief Utility macro to initialize pincfg field in #pinctrl_pin_t.
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*
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* @param node_id Node identifier.
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*/
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#define Z_PINCTRL_IT8XXX2_PINCFG_INIT(node_id) \
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(((IT8XXX2_HIGH_IMPEDANCE * DT_PROP(node_id, bias_high_impedance)) \
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<< IT8XXX2_IMPEDANCE_SHIFT) | \
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((IT8XXX2_PULL_PIN_DEFAULT * DT_PROP(node_id, bias_pull_pin_default)) \
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<< IT8XXX2_PUPDR_SHIFT) | \
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((IT8XXX2_PULL_UP * DT_PROP(node_id, bias_pull_up)) \
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<< IT8XXX2_PUPDR_SHIFT) | \
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((IT8XXX2_PULL_DOWN * DT_PROP(node_id, bias_pull_down)) \
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<< IT8XXX2_PUPDR_SHIFT) | \
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((IT8XXX2_VOLTAGE_1V8 * DT_ENUM_IDX(node_id, gpio_voltage)) \
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<< IT8XXX2_VOLTAGE_SHIFT) | \
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((IT8XXX2_INPUT_ENABLE * DT_PROP(node_id, input_enable)) \
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<< IT8XXX2_INPUT_SHIFT))
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/**
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* @brief Utility macro to initialize pinctrls of pinmuxs field in #pinctrl_pin_t.
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*
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* @param node_id Node identifier.
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*/
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#define Z_PINCTRL_IT8XXX2_PINCTRL_INIT(node_id) \
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DEVICE_DT_GET(DT_PHANDLE(node_id, pinmuxs))
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/**
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* @brief Utility macro to initialize pin of pinmuxs field in #pinctrl_pin_t.
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*
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* @param node_id Node identifier.
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*/
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#define Z_PINCTRL_IT8XXX2_PIN_INIT(node_id) \
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DT_PHA(node_id, pinmuxs, pin)
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/**
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* @brief Utility macro to initialize alt_func of pinmuxs field in #pinctrl_pin_t.
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*
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* @param node_id Node identifier.
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*/
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#define Z_PINCTRL_IT8XXX2_ALT_INIT(node_id) \
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DT_PHA(node_id, pinmuxs, alt_func)
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/**
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* @brief Utility macro to initialize each pin.
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*
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* @param node_id Node identifier.
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* @param prop Property name.
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* @param idx Property entry index.
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*/
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#define Z_PINCTRL_STATE_PIN_INIT(node_id, prop, idx) \
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{ .pinctrls = Z_PINCTRL_IT8XXX2_PINCTRL_INIT( \
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DT_PROP_BY_IDX(node_id, prop, idx)), \
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.pincfg = Z_PINCTRL_IT8XXX2_PINCFG_INIT( \
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DT_PROP_BY_IDX(node_id, prop, idx)), \
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.pin = Z_PINCTRL_IT8XXX2_PIN_INIT( \
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DT_PROP_BY_IDX(node_id, prop, idx)), \
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.alt_func = Z_PINCTRL_IT8XXX2_ALT_INIT( \
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DT_PROP_BY_IDX(node_id, prop, idx)), },
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/**
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* @brief Utility macro to initialize state pins contained in a given property.
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*
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* @param node_id Node identifier.
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* @param prop Property name describing state pins.
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*/
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#define Z_PINCTRL_STATE_PINS_INIT(node_id, prop) \
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{DT_FOREACH_PROP_ELEM(node_id, prop, Z_PINCTRL_STATE_PIN_INIT)}
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#endif /* ZEPHYR_SOC_RISCV_ITE_IT8XXX2_COMMON_PINCTRL_SOC_H_ */
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