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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2016
* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
*
* based on arch/powerpc/include/asm/mpc85xx_gpio.h, which is
*
* Copyright 2010 eXMeritus, A Boeing Company
* Copyright 2020-2021 NXP
*/
#include <common.h>
#include <dm.h>
#include <mapmem.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <dm/of_access.h>
struct mpc8xxx_gpio_data {
/* The bank's register base in memory */
struct ccsr_gpio __iomem *base;
/* The address of the registers; used to identify the bank */
ulong addr;
/* The GPIO count of the bank */
uint gpio_count;
/* The GPDAT register cannot be used to determine the value of output
* pins on MPC8572/MPC8536, so we shadow it and use the shadowed value
* for output pins
*/
u32 dat_shadow;
ulong type;
bool little_endian;
};
enum {
MPC8XXX_GPIO_TYPE,
MPC5121_GPIO_TYPE,
};
inline u32 gpio_mask(uint gpio)
{
return (1U << (31 - (gpio)));
}
static inline u32 mpc8xxx_gpio_get_val(struct udevice *dev, u32 mask)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
if (data->little_endian)
return in_le32(&data->base->gpdat) & mask;
else
return in_be32(&data->base->gpdat) & mask;
}
static inline u32 mpc8xxx_gpio_get_dir(struct udevice *dev, u32 mask)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
if (data->little_endian)
return in_le32(&data->base->gpdir) & mask;
else
return in_be32(&data->base->gpdir) & mask;
}
static inline int mpc8xxx_gpio_open_drain_val(struct udevice *dev, u32 mask)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
if (data->little_endian)
return in_le32(&data->base->gpodr) & mask;
else
return in_be32(&data->base->gpodr) & mask;
}
static inline void mpc8xxx_gpio_open_drain_on(struct udevice *dev, u32
gpios)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
/* GPODR register 1 -> open drain on */
if (data->little_endian)
setbits_le32(&data->base->gpodr, gpios);
else
setbits_be32(&data->base->gpodr, gpios);
}
static inline void mpc8xxx_gpio_open_drain_off(struct udevice *dev,
u32 gpios)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
/* GPODR register 0 -> open drain off (actively driven) */
if (data->little_endian)
clrbits_le32(&data->base->gpodr, gpios);
else
clrbits_be32(&data->base->gpodr, gpios);
}
static int mpc8xxx_gpio_direction_input(struct udevice *dev, uint gpio)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
u32 mask = gpio_mask(gpio);
/* GPDIR register 0 -> input */
if (data->little_endian)
clrbits_le32(&data->base->gpdir, mask);
else
clrbits_be32(&data->base->gpdir, mask);
return 0;
}
static int mpc8xxx_gpio_set_value(struct udevice *dev, uint gpio, int value)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
struct ccsr_gpio *base = data->base;
u32 mask = gpio_mask(gpio);
u32 gpdir;
if (value) {
data->dat_shadow |= mask;
} else {
data->dat_shadow &= ~mask;
}
if (data->little_endian)
gpdir = in_le32(&base->gpdir);
else
gpdir = in_be32(&base->gpdir);
gpdir |= gpio_mask(gpio);
if (data->little_endian) {
out_le32(&base->gpdat, gpdir & data->dat_shadow);
out_le32(&base->gpdir, gpdir);
} else {
out_be32(&base->gpdat, gpdir & data->dat_shadow);
out_be32(&base->gpdir, gpdir);
}
return 0;
}
static int mpc8xxx_gpio_direction_output(struct udevice *dev, uint gpio,
int value)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
/* GPIO 28..31 are input only on MPC5121 */
if (data->type == MPC5121_GPIO_TYPE && gpio >= 28)
return -EINVAL;
return mpc8xxx_gpio_set_value(dev, gpio, value);
}
static int mpc8xxx_gpio_get_value(struct udevice *dev, uint gpio)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
if (!!mpc8xxx_gpio_get_dir(dev, gpio_mask(gpio))) {
/* Output -> use shadowed value */
return !!(data->dat_shadow & gpio_mask(gpio));
}
/* Input -> read value from GPDAT register */
return !!mpc8xxx_gpio_get_val(dev, gpio_mask(gpio));
}
static int mpc8xxx_gpio_get_function(struct udevice *dev, uint gpio)
{
int dir;
dir = !!mpc8xxx_gpio_get_dir(dev, gpio_mask(gpio));
return dir ? GPIOF_OUTPUT : GPIOF_INPUT;
}
#if CONFIG_IS_ENABLED(OF_CONTROL)
static int mpc8xxx_gpio_of_to_plat(struct udevice *dev)
{
struct mpc8xxx_gpio_plat *plat = dev_get_plat(dev);
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
if (dev_read_bool(dev, "little-endian"))
data->little_endian = true;
plat->addr = (ulong)dev_read_addr_size_index(dev, 0, (fdt_size_t *)&plat->size);
plat->ngpios = dev_read_u32_default(dev, "ngpios", 32);
return 0;
}
#endif
static int mpc8xxx_gpio_plat_to_priv(struct udevice *dev)
{
struct mpc8xxx_gpio_data *priv = dev_get_priv(dev);
struct mpc8xxx_gpio_plat *plat = dev_get_plat(dev);
unsigned long size = plat->size;
ulong driver_data = dev_get_driver_data(dev);
if (size == 0)
size = 0x100;
priv->addr = plat->addr;
priv->base = map_sysmem(plat->addr, size);
if (!priv->base)
return -ENOMEM;
priv->gpio_count = plat->ngpios;
priv->dat_shadow = 0;
priv->type = driver_data;
return 0;
}
static int mpc8xxx_gpio_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
char name[32], *str;
mpc8xxx_gpio_plat_to_priv(dev);
snprintf(name, sizeof(name), "MPC@%lx_", data->addr);
str = strdup(name);
if (!str)
return -ENOMEM;
if (device_is_compatible(dev, "fsl,qoriq-gpio")) {
if (data->little_endian)
out_le32(&data->base->gpibe, 0xffffffff);
else
out_be32(&data->base->gpibe, 0xffffffff);
}
uc_priv->bank_name = str;
uc_priv->gpio_count = data->gpio_count;
return 0;
}
static const struct dm_gpio_ops gpio_mpc8xxx_ops = {
.direction_input = mpc8xxx_gpio_direction_input,
.direction_output = mpc8xxx_gpio_direction_output,
.get_value = mpc8xxx_gpio_get_value,
.set_value = mpc8xxx_gpio_set_value,
.get_function = mpc8xxx_gpio_get_function,
};
static const struct udevice_id mpc8xxx_gpio_ids[] = {
{ .compatible = "fsl,pq3-gpio", .data = MPC8XXX_GPIO_TYPE },
{ .compatible = "fsl,mpc8308-gpio", .data = MPC8XXX_GPIO_TYPE },
{ .compatible = "fsl,mpc8349-gpio", .data = MPC8XXX_GPIO_TYPE },
{ .compatible = "fsl,mpc8572-gpio", .data = MPC8XXX_GPIO_TYPE},
{ .compatible = "fsl,mpc8610-gpio", .data = MPC8XXX_GPIO_TYPE},
{ .compatible = "fsl,mpc5121-gpio", .data = MPC5121_GPIO_TYPE, },
{ .compatible = "fsl,qoriq-gpio", .data = MPC8XXX_GPIO_TYPE },
{ /* sentinel */ }
};
U_BOOT_DRIVER(gpio_mpc8xxx) = {
.name = "gpio_mpc8xxx",
.id = UCLASS_GPIO,
.ops = &gpio_mpc8xxx_ops,
#if CONFIG_IS_ENABLED(OF_CONTROL)
.of_to_plat = mpc8xxx_gpio_of_to_plat,
.plat_auto = sizeof(struct mpc8xxx_gpio_plat),
.of_match = mpc8xxx_gpio_ids,
#endif
.probe = mpc8xxx_gpio_probe,
.priv_auto = sizeof(struct mpc8xxx_gpio_data),
};
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