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// SPDX-License-Identifier: GPL-2.0
#include <common.h>
#include <dm.h>
#include <regmap.h>
#include <syscon.h>
#include <dm/device_compat.h>
#include <dm/pinctrl.h>
#define BCM6838_CMD_LOAD_MUX 0x21
#define BCM6838_FUNC_OFFS 12
#define BCM6838_FUNC_MASK (0x37 << BCM6838_FUNC_OFFS)
#define BCM6838_PIN_OFFS 0
#define BCM6838_PIN_MASK (0xfff << BCM6838_PIN_OFFS)
#define BCM6838_MAX_PIN_NAME_LEN 8
static char bcm6838_pin_name[BCM6838_MAX_PIN_NAME_LEN];
#define BCM6838_MAX_FUNC_NAME_LEN 8
static char bcm6838_func_name[BCM6838_MAX_FUNC_NAME_LEN];
struct bcm6838_test_port_hw {
unsigned long port_blk_data1;
unsigned long port_blk_data2;
unsigned long port_command;
};
static const struct bcm6838_test_port_hw bcm6838_hw = {
.port_blk_data1 = 0x10,
.port_blk_data2 = 0x14,
.port_command = 0x18
};
struct bcm6838_pinctrl_priv {
const struct bcm6838_test_port_hw *hw;
struct regmap *regmap;
u32 pins_count;
u32 functions_count;
};
int bcm6838_pinctrl_get_pins_count(struct udevice *dev)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
return priv->pins_count;
}
const char *bcm6838_pinctrl_get_pin_name(struct udevice *dev,
unsigned int selector)
{
snprintf(bcm6838_pin_name, BCM6838_MAX_PIN_NAME_LEN, "%u", selector);
return bcm6838_pin_name;
}
int bcm6838_pinctrl_get_functions_count(struct udevice *dev)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
return priv->functions_count;
}
const char *bcm6838_pinctrl_get_function_name(struct udevice *dev,
unsigned int selector)
{
snprintf(bcm6838_func_name, BCM6838_MAX_FUNC_NAME_LEN, "%u", selector);
return bcm6838_func_name;
}
int bcm6838_pinctrl_pinmux_set(struct udevice *dev,
unsigned int pin_selector,
unsigned int func_selector)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
const struct bcm6838_test_port_hw *hw = priv->hw;
unsigned int data;
regmap_write(priv->regmap, hw->port_blk_data1, 0);
data = (func_selector << BCM6838_FUNC_OFFS) & BCM6838_FUNC_MASK;
data |= (pin_selector << BCM6838_PIN_OFFS) & BCM6838_PIN_MASK;
regmap_write(priv->regmap, hw->port_blk_data2, data);
regmap_write(priv->regmap, hw->port_command, BCM6838_CMD_LOAD_MUX);
return 0;
}
int bcm6838_pinctrl_probe(struct udevice *dev)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
const struct bcm6838_test_port_hw *hw =
(const struct bcm6838_test_port_hw *)dev_get_driver_data(dev);
int err;
u32 phandle;
ofnode node;
err = ofnode_read_u32(dev_ofnode(dev), "regmap", &phandle);
if (err) {
dev_err(dev, "%s: unable to read regmap\n", __func__);
goto out;
}
node = ofnode_get_by_phandle(phandle);
if (!ofnode_valid(node)) {
dev_err(dev, "%s: unable to find node\n", __func__);
err = -EINVAL;
goto out;
}
priv->regmap = syscon_node_to_regmap(node);
if (!priv->regmap) {
dev_err(dev, "%s: unable to find regmap\n", __func__);
err = -ENODEV;
goto out;
}
err = ofnode_read_u32(dev_ofnode(dev), "brcm,pins-count",
&priv->pins_count);
if (err) {
dev_err(dev, "%s: unable to read brcm,pins-count\n",
__func__);
goto out;
}
err = ofnode_read_u32(dev_ofnode(dev), "brcm,functions-count",
&priv->functions_count);
if (err) {
dev_err(dev, "%s: unable to read brcm,functions-count\n",
__func__);
goto out;
}
priv->hw = hw;
out:
return err;
}
const struct pinctrl_ops bcm6838_pinctrl_ops = {
.set_state = pinctrl_generic_set_state,
.get_pins_count = bcm6838_pinctrl_get_pins_count,
.get_pin_name = bcm6838_pinctrl_get_pin_name,
.get_functions_count = bcm6838_pinctrl_get_functions_count,
.get_function_name = bcm6838_pinctrl_get_function_name,
.pinmux_set = bcm6838_pinctrl_pinmux_set,
};
static const struct udevice_id bcm6838_pinctrl_match[] = {
{
.compatible = "brcm,bcm6838-pinctrl",
.data = (ulong)&bcm6838_hw,
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(bcm6838_pinctrl) = {
.name = "bcm6838_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = bcm6838_pinctrl_match,
.ops = &bcm6838_pinctrl_ops,
.priv_auto_alloc_size = sizeof(struct bcm6838_pinctrl_priv),
.probe = bcm6838_pinctrl_probe,
};
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