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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2024 CS GROUP France
* Christophe Leroy <christophe.leroy@csgroup.eu>
*/
#include <asm/io.h>
#include <dm.h>
#include <mapmem.h>
#include <asm/gpio.h>
#include <malloc.h>
#include "../common/common.h"
struct mcr3000_spi_gpio_plat {
ulong addr;
};
struct mcr3000_spi_gpio_data {
void __iomem *base;
};
static int mcr3000_spi_gpio_set_value(struct udevice *dev, uint gpio, int value)
{
struct mcr3000_spi_gpio_data *data = dev_get_priv(dev);
if (value)
clrsetbits_be16(data->base, 7 << 5, (gpio & 7) << 5);
else
clrbits_be16(data->base, 7 << 5);
return 0;
}
static int mcr3000_spi_gpio_get_value(struct udevice *dev, uint gpio)
{
struct mcr3000_spi_gpio_data *data = dev_get_priv(dev);
return gpio == ((in_be16(data->base) >> 5) & 7);
}
static int mcr3000_spi_gpio_direction_input(struct udevice *dev, uint gpio)
{
return 0;
}
static int mcr3000_spi_gpio_get_function(struct udevice *dev, uint gpio)
{
return GPIOF_OUTPUT;
}
static int mcr3000_spi_gpio_ofdata_to_platdata(struct udevice *dev)
{
struct mcr3000_spi_gpio_plat *plat = dev_get_plat(dev);
fdt_addr_t addr;
u32 reg[2];
dev_read_u32_array(dev, "reg", reg, 2);
addr = dev_translate_address(dev, reg);
plat->addr = addr;
return 0;
}
static int mcr3000_spi_gpio_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct mcr3000_spi_gpio_data *data = dev_get_priv(dev);
struct mcr3000_spi_gpio_plat *plat = dev_get_plat(dev);
char name[32], *str;
data->base = map_sysmem(plat->addr, 2);
snprintf(name, sizeof(name), "CHIPSELECT@%lx_", plat->addr);
str = strdup(name);
if (!str)
return -ENOMEM;
uc_priv->bank_name = str;
uc_priv->gpio_count = 16;
return 0;
}
static const struct dm_gpio_ops gpio_mcr3000_spi_ops = {
.get_value = mcr3000_spi_gpio_get_value,
.set_value = mcr3000_spi_gpio_set_value,
.direction_input = mcr3000_spi_gpio_direction_input,
.direction_output = mcr3000_spi_gpio_set_value,
.get_function = mcr3000_spi_gpio_get_function,
};
static const struct udevice_id mcr3000_spi_gpio_ids[] = {
{ .compatible = "s3k,mcr3000-cpld-csspi"},
{ /* sentinel */ }
};
U_BOOT_DRIVER(mcr3000_spi_gpio) = {
.name = "mcr3000_spi_chipselect",
.id = UCLASS_GPIO,
.ops = &gpio_mcr3000_spi_ops,
.of_to_plat = mcr3000_spi_gpio_ofdata_to_platdata,
.plat_auto = sizeof(struct mcr3000_spi_gpio_plat),
.of_match = mcr3000_spi_gpio_ids,
.probe = mcr3000_spi_gpio_probe,
.priv_auto = sizeof(struct mcr3000_spi_gpio_data),
};
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