136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Jerome Brunet <jbrunet@baylibre.com>
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* Copyright (C) 2017 Xingyu Chen <xingyu.chen@amlogic.com>
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*/
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#include <asm/gpio.h>
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#include <common.h>
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#include <dm.h>
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#include <dm/pinctrl.h>
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#include <linux/io.h>
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#include "pinctrl-meson-axg.h"
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static int meson_axg_pmx_get_bank(struct udevice *dev, unsigned int pin,
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struct meson_pmx_bank **bank)
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{
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int i;
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struct meson_pinctrl *priv = dev_get_priv(dev);
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struct meson_axg_pmx_data *pmx = priv->data->pmx_data;
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for (i = 0; i < pmx->num_pmx_banks; i++)
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if (pin >= pmx->pmx_banks[i].first &&
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pin <= pmx->pmx_banks[i].last) {
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*bank = &pmx->pmx_banks[i];
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return 0;
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}
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return -EINVAL;
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}
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static int meson_axg_pmx_calc_reg_and_offset(struct meson_pmx_bank *bank,
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unsigned int pin,
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unsigned int *reg,
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unsigned int *offset)
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{
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int shift;
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shift = pin - bank->first;
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*reg = bank->reg + (bank->offset + (shift << 2)) / 32;
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*offset = (bank->offset + (shift << 2)) % 32;
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return 0;
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}
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static int meson_axg_pmx_update_function(struct udevice *dev,
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unsigned int pin, unsigned int func)
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{
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struct meson_pinctrl *priv = dev_get_priv(dev);
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struct meson_pmx_bank *bank;
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unsigned int offset;
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unsigned int reg;
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unsigned int tmp;
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int ret;
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ret = meson_axg_pmx_get_bank(dev, pin, &bank);
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if (ret)
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return ret;
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meson_axg_pmx_calc_reg_and_offset(bank, pin, ®, &offset);
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tmp = readl(priv->reg_mux + (reg << 2));
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tmp &= ~(0xf << offset);
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tmp |= (func & 0xf) << offset;
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writel(tmp, priv->reg_mux + (reg << 2));
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return ret;
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}
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static int meson_axg_pinmux_group_set(struct udevice *dev,
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unsigned int group_selector,
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unsigned int func_selector)
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{
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struct meson_pinctrl *priv = dev_get_priv(dev);
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const struct meson_pmx_group *group;
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const struct meson_pmx_func *func;
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struct meson_pmx_axg_data *pmx_data;
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int i, ret;
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group = &priv->data->groups[group_selector];
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pmx_data = (struct meson_pmx_axg_data *)group->data;
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func = &priv->data->funcs[func_selector];
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debug("pinmux: set group %s func %s\n", group->name, func->name);
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for (i = 0; i < group->num_pins; i++) {
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ret = meson_axg_pmx_update_function(dev, group->pins[i],
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pmx_data->func);
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if (ret)
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return ret;
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}
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return 0;
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}
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const struct pinconf_param meson_axg_pinconf_params[] = {
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{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
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{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
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{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
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};
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const struct pinctrl_ops meson_axg_pinctrl_ops = {
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.get_groups_count = meson_pinctrl_get_groups_count,
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.get_group_name = meson_pinctrl_get_group_name,
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.get_functions_count = meson_pinmux_get_functions_count,
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.get_function_name = meson_pinmux_get_function_name,
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.pinmux_group_set = meson_axg_pinmux_group_set,
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.set_state = pinctrl_generic_set_state,
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.pinconf_params = meson_axg_pinconf_params,
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.pinconf_num_params = ARRAY_SIZE(meson_axg_pinconf_params),
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.pinconf_set = meson_pinconf_set,
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.pinconf_group_set = meson_pinconf_group_set,
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};
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static int meson_axg_gpio_request(struct udevice *dev,
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unsigned int offset, const char *label)
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{
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return meson_axg_pmx_update_function(dev->parent, offset, 0);
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}
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static const struct dm_gpio_ops meson_axg_gpio_ops = {
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.request = meson_axg_gpio_request,
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.set_value = meson_gpio_set,
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.get_value = meson_gpio_get,
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.get_function = meson_gpio_get_direction,
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.direction_input = meson_gpio_direction_input,
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.direction_output = meson_gpio_direction_output,
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};
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const struct driver meson_axg_gpio_driver = {
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.name = "meson-axg-gpio",
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.id = UCLASS_GPIO,
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.probe = meson_gpio_probe,
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.ops = &meson_axg_gpio_ops,
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};
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