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