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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*/
/* #define DEBUG */
#include <common.h>
#include <dm.h>
#include <log.h>
#include <dm/pinctrl.h>
#include <linux/bitops.h>
static const char * const sandbox_pins[] = {
"SCL",
"SDA",
"TX",
"RX",
"W1",
"GPIO0",
"GPIO1",
"GPIO2",
"GPIO3",
};
static const char * const sandbox_pins_muxing[] = {
"I2C SCL",
"I2C SDA",
"Uart TX",
"Uart RX",
"1-wire gpio",
"gpio",
"gpio",
"gpio",
"gpio",
};
static const char * const sandbox_groups[] = {
"i2c",
"serial_a",
"serial_b",
"spi",
"w1",
};
static const char * const sandbox_functions[] = {
"i2c",
"serial",
"spi",
"w1",
"gpio",
"gpio",
"gpio",
"gpio",
};
static const struct pinconf_param sandbox_conf_params[] = {
{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
};
/* bitfield used to save param and value of each pin/selector */
static unsigned int sandbox_pins_param[ARRAY_SIZE(sandbox_pins)];
static unsigned int sandbox_pins_value[ARRAY_SIZE(sandbox_pins)];
static int sandbox_get_pins_count(struct udevice *dev)
{
return ARRAY_SIZE(sandbox_pins);
}
static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
{
return sandbox_pins[selector];
}
static int sandbox_get_pin_muxing(struct udevice *dev,
unsigned int selector,
char *buf, int size)
{
const struct pinconf_param *p;
int i;
snprintf(buf, size, "%s", sandbox_pins_muxing[selector]);
if (sandbox_pins_param[selector]) {
for (i = 0, p = sandbox_conf_params;
i < ARRAY_SIZE(sandbox_conf_params);
i++, p++) {
if ((sandbox_pins_param[selector] & BIT(p->param)) &&
(!!(sandbox_pins_value[selector] & BIT(p->param)) ==
p->default_value)) {
strncat(buf, " ", size);
strncat(buf, p->property, size);
}
}
}
strncat(buf, ".", size);
return 0;
}
static int sandbox_get_groups_count(struct udevice *dev)
{
return ARRAY_SIZE(sandbox_groups);
}
static const char *sandbox_get_group_name(struct udevice *dev,
unsigned selector)
{
return sandbox_groups[selector];
}
static int sandbox_get_functions_count(struct udevice *dev)
{
return ARRAY_SIZE(sandbox_functions);
}
static const char *sandbox_get_function_name(struct udevice *dev,
unsigned selector)
{
return sandbox_functions[selector];
}
static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
unsigned func_selector)
{
debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
pin_selector, sandbox_get_pin_name(dev, pin_selector),
func_selector, sandbox_get_function_name(dev, func_selector));
sandbox_pins_param[pin_selector] = 0;
sandbox_pins_value[pin_selector] = 0;
return 0;
}
static int sandbox_pinmux_group_set(struct udevice *dev,
unsigned group_selector,
unsigned func_selector)
{
debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
group_selector, sandbox_get_group_name(dev, group_selector),
func_selector, sandbox_get_function_name(dev, func_selector));
return 0;
}
static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
unsigned param, unsigned argument)
{
debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
pin_selector, sandbox_get_pin_name(dev, pin_selector),
param, argument);
sandbox_pins_param[pin_selector] |= BIT(param);
if (argument)
sandbox_pins_value[pin_selector] |= BIT(param);
else
sandbox_pins_value[pin_selector] &= ~BIT(param);
return 0;
}
static int sandbox_pinconf_group_set(struct udevice *dev,
unsigned group_selector,
unsigned param, unsigned argument)
{
debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
group_selector, sandbox_get_group_name(dev, group_selector),
param, argument);
return 0;
}
const struct pinctrl_ops sandbox_pinctrl_ops = {
.get_pins_count = sandbox_get_pins_count,
.get_pin_name = sandbox_get_pin_name,
.get_pin_muxing = sandbox_get_pin_muxing,
.get_groups_count = sandbox_get_groups_count,
.get_group_name = sandbox_get_group_name,
.get_functions_count = sandbox_get_functions_count,
.get_function_name = sandbox_get_function_name,
.pinmux_set = sandbox_pinmux_set,
.pinmux_group_set = sandbox_pinmux_group_set,
.pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
.pinconf_params = sandbox_conf_params,
.pinconf_set = sandbox_pinconf_set,
.pinconf_group_set = sandbox_pinconf_group_set,
.set_state = pinctrl_generic_set_state,
};
static const struct udevice_id sandbox_pinctrl_match[] = {
{ .compatible = "sandbox,pinctrl" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(sandbox_pinctrl) = {
.name = "sandbox_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = sandbox_pinctrl_match,
.ops = &sandbox_pinctrl_ops,
};
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