123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2018 Jerome Brunet <jbrunet@baylibre.com>
- * Copyright (C) 2017 Xingyu Chen <xingyu.chen@amlogic.com>
- */
- #include <log.h>
- #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)
- {
- struct meson_pinctrl *priv = dev_get_priv(dev->parent);
- return meson_axg_pmx_update_function(dev->parent,
- offset + priv->data->pin_base, 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,
- };
|