// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl> */
#include <linux/err.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/string_helpers.h>
#include "../core.h"
#include "../pinmux.h"
#define BCM4908_NUM_PINS 86
#define BCM4908_TEST_PORT_BLOCK_EN_LSB 0x00
#define BCM4908_TEST_PORT_BLOCK_DATA_MSB 0x04
#define BCM4908_TEST_PORT_BLOCK_DATA_LSB 0x08
#define BCM4908_TEST_PORT_LSB_PINMUX_DATA_SHIFT 12
#define BCM4908_TEST_PORT_COMMAND 0x0c
#define BCM4908_TEST_PORT_CMD_LOAD_MUX_REG 0x00000021
struct bcm4908_pinctrl {
struct device *dev;
void __iomem *base;
struct mutex mutex;
struct pinctrl_dev *pctldev;
struct pinctrl_desc pctldesc;
};
/*
* Groups
*/
struct bcm4908_pinctrl_pin_setup {
unsigned int number;
unsigned int function;
};
static const struct bcm4908_pinctrl_pin_setup led_0_pins_a[] = {
{ 0, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_1_pins_a[] = {
{ 1, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_2_pins_a[] = {
{ 2, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_3_pins_a[] = {
{ 3, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_4_pins_a[] = {
{ 4, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_5_pins_a[] = {
{ 5, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_6_pins_a[] = {
{ 6, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_7_pins_a[] = {
{ 7, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_8_pins_a[] = {
{ 8, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_9_pins_a[] = {
{ 9, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_10_pins_a[] = {
{ 10, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_11_pins_a[] = {
{ 11, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_12_pins_a[] = {
{ 12, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_13_pins_a[] = {
{ 13, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_14_pins_a[] = {
{ 14, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_15_pins_a[] = {
{ 15, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_16_pins_a[] = {
{ 16, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_17_pins_a[] = {
{ 17, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_18_pins_a[] = {
{ 18, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_19_pins_a[] = {
{ 19, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_20_pins_a[] = {
{ 20, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_21_pins_a[] = {
{ 21, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_22_pins_a[] = {
{ 22, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_23_pins_a[] = {
{ 23, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_24_pins_a[] = {
{ 24, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_25_pins_a[] = {
{ 25, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_26_pins_a[] = {
{ 26, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_27_pins_a[] = {
{ 27, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_28_pins_a[] = {
{ 28, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_29_pins_a[] = {
{ 29, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_30_pins_a[] = {
{ 30, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_31_pins_a[] = {
{ 31, 3 },
};
static const struct bcm4908_pinctrl_pin_setup led_10_pins_b[] = {
{ 8, 2 },
};
static const struct bcm4908_pinctrl_pin_setup led_11_pins_b[] = {
{ 9, 2 },
};
static const struct bcm4908_pinctrl_pin_setup led_12_pins_b[] = {
{ 0, 2 },
};
static const struct bcm4908_pinctrl_pin_setup led_13_pins_b[] = {
{ 1, 2 },
};
static const struct bcm4908_pinctrl_pin_setup led_31_pins_b[] = {
{ 30, 2 },
};
static const struct bcm4908_pinctrl_pin_setup hs_uart_pins[] = {
{ 10, 0 }, /* CTS */
{ 11, 0 }, /* RTS */
{ 12, 0 }, /* RXD */
{ 13, 0 }, /* TXD */
};
static const struct bcm4908_pinctrl_pin_setup i2c_pins_a[] = {
{ 18, 0 }, /* SDA */
{ 19, 0 }, /* SCL */
};
static const struct bcm4908_pinctrl_pin_setup i2c_pins_b[] = {
{ 22, 0 }, /* SDA */
{ 23, 0 }, /* SCL */
};
static const struct bcm4908_pinctrl_pin_setup i2s_pins[] = {
{ 27, 0 }, /* MCLK */
{ 28, 0 }, /* LRCK */
{ 29, 0 }, /* SDATA */
{ 30, 0 }, /* SCLK */
};
static const struct bcm4908_pinctrl_pin_setup nand_ctrl_pins[] = {
{ 32, 0 },
{ 33, 0 },
{ 34, 0 },
{ 43, 0 },
{ 44, 0 },
{ 45, 0 },
{ 56, 1 },
};
static const struct bcm4908_pinctrl_pin_setup nand_data_pins[] = {
{ 35, 0 },
{ 36, 0 },
{ 37, 0 },
{ 38, 0 },
{ 39, 0 },
{ 40, 0 },
{ 41, 0 },
{ 42, 0 },
};
static const struct bcm4908_pinctrl_pin_setup emmc_ctrl_pins[] = {
{ 46, 0 },
{ 47, 0 },
};
static const struct bcm4908_pinctrl_pin_setup usb0_pwr_pins[] = {
{ 63, 0 },
{ 64, 0 },
};
static const struct bcm4908_pinctrl_pin_setup usb1_pwr_pins[] = {
{ 66, 0 },
{ 67, 0 },
};
struct bcm4908_pinctrl_grp {
const char *name;
const struct bcm4908_pinctrl_pin_setup *pins;
const unsigned int num_pins;
};
static const struct bcm4908_pinctrl_grp bcm4908_pinctrl_grps[] = {
{ "led_0_grp_a", led_0_pins_a, ARRAY_SIZE(led_0_pins_a) },
{ "led_1_grp_a", led_1_pins_a, ARRAY_SIZE(led_1_pins_a) },
{ "led_2_grp_a", led_2_pins_a, ARRAY_SIZE(led_2_pins_a) },
{ "led_3_grp_a", led_3_pins_a, ARRAY_SIZE(led_3_pins_a) },
{ "led_4_grp_a", led_4_pins_a, ARRAY_SIZE(led_4_pins_a) },
{ "led_5_grp_a", led_5_pins_a, ARRAY_SIZE(led_5_pins_a) },
{ "led_6_grp_a", led_6_pins_a, ARRAY_SIZE(led_6_pins_a) },
{ "led_7_grp_a", led_7_pins_a, ARRAY_SIZE(led_7_pins_a) },
{ "led_8_grp_a", led_8_pins_a, ARRAY_SIZE(led_8_pins_a) },
{ "led_9_grp_a", led_9_pins_a, ARRAY_SIZE(led_9_pins_a) },
{ "led_10_grp_a", led_10_pins_a, ARRAY_SIZE(led_10_pins_a) },
{ "led_11_grp_a", led_11_pins_a, ARRAY_SIZE(led_11_pins_a) },
{ "led_12_grp_a", led_12_pins_a, ARRAY_SIZE(led_12_pins_a) },
{ "led_13_grp_a", led_13_pins_a, ARRAY_SIZE(led_13_pins_a) },
{ "led_14_grp_a", led_14_pins_a, ARRAY_SIZE(led_14_pins_a) },
{ "led_15_grp_a", led_15_pins_a, ARRAY_SIZE(led_15_pins_a) },
{ "led_16_grp_a", led_16_pins_a, ARRAY_SIZE(led_16_pins_a) },
{ "led_17_grp_a", led_17_pins_a, ARRAY_SIZE(led_17_pins_a) },
{ "led_18_grp_a", led_18_pins_a, ARRAY_SIZE(led_18_pins_a) },
{ "led_19_grp_a", led_19_pins_a, ARRAY_SIZE(led_19_pins_a) },
{ "led_20_grp_a", led_20_pins_a, ARRAY_SIZE(led_20_pins_a) },
{ "led_21_grp_a", led_21_pins_a, ARRAY_SIZE(led_21_pins_a) },
{ "led_22_grp_a", led_22_pins_a, ARRAY_SIZE(led_22_pins_a) },
{ "led_23_grp_a", led_23_pins_a, ARRAY_SIZE(led_23_pins_a) },
{ "led_24_grp_a", led_24_pins_a, ARRAY_SIZE(led_24_pins_a) },
{ "led_25_grp_a", led_25_pins_a, ARRAY_SIZE(led_25_pins_a) },
{ "led_26_grp_a", led_26_pins_a, ARRAY_SIZE(led_26_pins_a) },
{ "led_27_grp_a", led_27_pins_a, ARRAY_SIZE(led_27_pins_a) },
{ "led_28_grp_a", led_28_pins_a, ARRAY_SIZE(led_28_pins_a) },
{ "led_29_grp_a", led_29_pins_a, ARRAY_SIZE(led_29_pins_a) },
{ "led_30_grp_a", led_30_pins_a, ARRAY_SIZE(led_30_pins_a) },
{ "led_31_grp_a", led_31_pins_a, ARRAY_SIZE(led_31_pins_a) },
{ "led_10_grp_b", led_10_pins_b, ARRAY_SIZE(led_10_pins_b) },
{ "led_11_grp_b", led_11_pins_b, ARRAY_SIZE(led_11_pins_b) },
{ "led_12_grp_b", led_12_pins_b, ARRAY_SIZE(led_12_pins_b) },
{ "led_13_grp_b", led_13_pins_b, ARRAY_SIZE(led_13_pins_b) },
{ "led_31_grp_b", led_31_pins_b, ARRAY_SIZE(led_31_pins_b) },
{ "hs_uart_grp", hs_uart_pins, ARRAY_SIZE(hs_uart_pins) },
{ "i2c_grp_a", i2c_pins_a, ARRAY_SIZE(i2c_pins_a) },
{ "i2c_grp_b", i2c_pins_b, ARRAY_SIZE(i2c_pins_b) },
{ "i2s_grp", i2s_pins, ARRAY_SIZE(i2s_pins) },
{ "nand_ctrl_grp", nand_ctrl_pins, ARRAY_SIZE(nand_ctrl_pins) },
{ "nand_data_grp", nand_data_pins, ARRAY_SIZE(nand_data_pins) },
{ "emmc_ctrl_grp", emmc_ctrl_pins, ARRAY_SIZE(emmc_ctrl_pins) },
{ "usb0_pwr_grp", usb0_pwr_pins, ARRAY_SIZE(usb0_pwr_pins) },
{ "usb1_pwr_grp", usb1_pwr_pins, ARRAY_SIZE(usb1_pwr_pins) },
};
/*
* Functions
*/
struct bcm4908_pinctrl_function {
const char *name;
const char * const *groups;
const unsigned int num_groups;
};
static const char * const led_0_groups[] = { "led_0_grp_a" };
static const char * const led_1_groups[] = { "led_1_grp_a" };
static const char * const led_2_groups[] = { "led_2_grp_a" };
static const char * const led_3_groups[] = { "led_3_grp_a" };
static const char * const led_4_groups[] = { "led_4_grp_a" };
static const char * const led_5_groups[] = { "led_5_grp_a" };
static const char * const led_6_groups[] = { "led_6_grp_a" };
static const char * const led_7_groups[] = { "led_7_grp_a" };
static const char * const led_8_groups[] = { "led_8_grp_a" };
static const char * const led_9_groups[] = { "led_9_grp_a" };
static const char * const led_10_groups[] = { "led_10_grp_a", "led_10_grp_b" };
static const char * const led_11_groups[] = { "led_11_grp_a", "led_11_grp_b" };
static const char * const led_12_groups[] = { "led_12_grp_a", "led_12_grp_b" };
static const char * const led_13_groups[] = { "led_13_grp_a", "led_13_grp_b" };
static const char * const led_14_groups[] = { "led_14_grp_a" };
static const char * const led_15_groups[] = { "led_15_grp_a" };
static const char * const led_16_groups[] = { "led_16_grp_a" };
static const char * const led_17_groups[] = { "led_17_grp_a" };
static const char * const led_18_groups[] = { "led_18_grp_a" };
static const char * const led_19_groups[] = { "led_19_grp_a" };
static const char * const led_20_groups[] = { "led_20_grp_a" };
static const char * const led_21_groups[] = { "led_21_grp_a" };
static const char * const led_22_groups[] = { "led_22_grp_a" };
static const char * const led_23_groups[] = { "led_23_grp_a" };
static const char * const led_24_groups[] = { "led_24_grp_a" };
static const char * const led_25_groups[] = { "led_25_grp_a" };
static const char * const led_26_groups[] = { "led_26_grp_a" };
static const char * const led_27_groups[] = { "led_27_grp_a" };
static const char * const led_28_groups[] = { "led_28_grp_a" };
static const char * const led_29_groups[] = { "led_29_grp_a" };
static const char * const led_30_groups[] = { "led_30_grp_a" };
static const char * const led_31_groups[] = { "led_31_grp_a", "led_31_grp_b" };
static const char * const hs_uart_groups[] = { "hs_uart_grp" };
static const char * const i2c_groups[] = { "i2c_grp_a", "i2c_grp_b" };
static const char * const i2s_groups[] = { "i2s_grp" };
static const char * const nand_ctrl_groups[] = { "nand_ctrl_grp" };
static const char * const nand_data_groups[] = { "nand_data_grp" };
static const char * const emmc_ctrl_groups[] = { "emmc_ctrl_grp" };
static const char * const usb0_pwr_groups[] = { "usb0_pwr_grp" };
static const char * const usb1_pwr_groups[] = { "usb1_pwr_grp" };
static const struct bcm4908_pinctrl_function bcm4908_pinctrl_functions[] = {
{ "led_0", led_0_groups, ARRAY_SIZE(led_0_groups) },
{ "led_1", led_1_groups, ARRAY_SIZE(led_1_groups) },
{ "led_2", led_2_groups, ARRAY_SIZE(led_2_groups) },
{ "led_3", led_3_groups, ARRAY_SIZE(led_3_groups) },
{ "led_4", led_4_groups, ARRAY_SIZE(led_4_groups) },
{ "led_5", led_5_groups, ARRAY_SIZE(led_5_groups) },
{ "led_6", led_6_groups, ARRAY_SIZE(led_6_groups) },
{ "led_7", led_7_groups, ARRAY_SIZE(led_7_groups) },
{ "led_8", led_8_groups, ARRAY_SIZE(led_8_groups) },
{ "led_9", led_9_groups, ARRAY_SIZE(led_9_groups) },
{ "led_10", led_10_groups, ARRAY_SIZE(led_10_groups) },
{ "led_11", led_11_groups, ARRAY_SIZE(led_11_groups) },
{ "led_12", led_12_groups, ARRAY_SIZE(led_12_groups) },
{ "led_13", led_13_groups, ARRAY_SIZE(led_13_groups) },
{ "led_14", led_14_groups, ARRAY_SIZE(led_14_groups) },
{ "led_15", led_15_groups, ARRAY_SIZE(led_15_groups) },
{ "led_16", led_16_groups, ARRAY_SIZE(led_16_groups) },
{ "led_17", led_17_groups, ARRAY_SIZE(led_17_groups) },
{ "led_18", led_18_groups, ARRAY_SIZE(led_18_groups) },
{ "led_19", led_19_groups, ARRAY_SIZE(led_19_groups) },
{ "led_20", led_20_groups, ARRAY_SIZE(led_20_groups) },
{ "led_21", led_21_groups, ARRAY_SIZE(led_21_groups) },
{ "led_22", led_22_groups, ARRAY_SIZE(led_22_groups) },
{ "led_23", led_23_groups, ARRAY_SIZE(led_23_groups) },
{ "led_24", led_24_groups, ARRAY_SIZE(led_24_groups) },
{ "led_25", led_25_groups, ARRAY_SIZE(led_25_groups) },
{ "led_26", led_26_groups, ARRAY_SIZE(led_26_groups) },
{ "led_27", led_27_groups, ARRAY_SIZE(led_27_groups) },
{ "led_28", led_28_groups, ARRAY_SIZE(led_28_groups) },
{ "led_29", led_29_groups, ARRAY_SIZE(led_29_groups) },
{ "led_30", led_30_groups, ARRAY_SIZE(led_30_groups) },
{ "led_31", led_31_groups, ARRAY_SIZE(led_31_groups) },
{ "hs_uart", hs_uart_groups, ARRAY_SIZE(hs_uart_groups) },
{ "i2c", i2c_groups, ARRAY_SIZE(i2c_groups) },
{ "i2s", i2s_groups, ARRAY_SIZE(i2s_groups) },
{ "nand_ctrl", nand_ctrl_groups, ARRAY_SIZE(nand_ctrl_groups) },
{ "nand_data", nand_data_groups, ARRAY_SIZE(nand_data_groups) },
{ "emmc_ctrl", emmc_ctrl_groups, ARRAY_SIZE(emmc_ctrl_groups) },
{ "usb0_pwr", usb0_pwr_groups, ARRAY_SIZE(usb0_pwr_groups) },
{ "usb1_pwr", usb1_pwr_groups, ARRAY_SIZE(usb1_pwr_groups) },
};
/*
* Groups code
*/
static const struct pinctrl_ops bcm4908_pinctrl_ops = {
.get_groups_count = pinctrl_generic_get_group_count,
.get_group_name = pinctrl_generic_get_group_name,
.get_group_pins = pinctrl_generic_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinconf_generic_dt_free_map,
};
/*
* Functions code
*/
static int bcm4908_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,
unsigned int func_selector,
unsigned int group_selector)
{
struct bcm4908_pinctrl *bcm4908_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
const struct bcm4908_pinctrl_grp *group;
struct group_desc *group_desc;
int i;
group_desc = pinctrl_generic_get_group(pctrl_dev, group_selector);
if (!group_desc)
return -EINVAL;
group = group_desc->data;
mutex_lock(&bcm4908_pinctrl->mutex);
for (i = 0; i < group->num_pins; i++) {
u32 lsb = 0;
lsb |= group->pins[i].number;
lsb |= group->pins[i].function << BCM4908_TEST_PORT_LSB_PINMUX_DATA_SHIFT;
writel(0x0, bcm4908_pinctrl->base + BCM4908_TEST_PORT_BLOCK_DATA_MSB);
writel(lsb, bcm4908_pinctrl->base + BCM4908_TEST_PORT_BLOCK_DATA_LSB);
writel(BCM4908_TEST_PORT_CMD_LOAD_MUX_REG,
bcm4908_pinctrl->base + BCM4908_TEST_PORT_COMMAND);
}
mutex_unlock(&bcm4908_pinctrl->mutex);
return 0;
}
static const struct pinmux_ops bcm4908_pinctrl_pmxops = {
.get_functions_count = pinmux_generic_get_function_count,
.get_function_name = pinmux_generic_get_function_name,
.get_function_groups = pinmux_generic_get_function_groups,
.set_mux = bcm4908_pinctrl_set_mux,
};
/*
* Controller code
*/
static struct pinctrl_desc bcm4908_pinctrl_desc = {
.name = "bcm4908-pinctrl",
.pctlops = &bcm4908_pinctrl_ops,
.pmxops = &bcm4908_pinctrl_pmxops,
};
static const struct of_device_id bcm4908_pinctrl_of_match_table[] = {
{ .compatible = "brcm,bcm4908-pinctrl", },
{ }
};
static int bcm4908_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct bcm4908_pinctrl *bcm4908_pinctrl;
struct pinctrl_desc *pctldesc;
struct pinctrl_pin_desc *pins;
char **pin_names;
int i;
bcm4908_pinctrl = devm_kzalloc(dev, sizeof(*bcm4908_pinctrl), GFP_KERNEL);
if (!bcm4908_pinctrl)
return -ENOMEM;
pctldesc = &bcm4908_pinctrl->pctldesc;
platform_set_drvdata(pdev, bcm4908_pinctrl);
/* Set basic properties */
bcm4908_pinctrl->dev = dev;
bcm4908_pinctrl->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(bcm4908_pinctrl->base))
return PTR_ERR(bcm4908_pinctrl->base);
mutex_init(&bcm4908_pinctrl->mutex);
memcpy(pctldesc, &bcm4908_pinctrl_desc, sizeof(*pctldesc));
/* Set pinctrl properties */
pin_names = devm_kasprintf_strarray(dev, "pin", BCM4908_NUM_PINS);
if (IS_ERR(pin_names))
return PTR_ERR(pin_names);
pins = devm_kcalloc(dev, BCM4908_NUM_PINS, sizeof(*pins), GFP_KERNEL);
if (!pins)
return -ENOMEM;
for (i = 0; i < BCM4908_NUM_PINS; i++) {
pins[i].number = i;
pins[i].name = pin_names[i];
}
pctldesc->pins = pins;
pctldesc->npins = BCM4908_NUM_PINS;
/* Register */
bcm4908_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, bcm4908_pinctrl);
if (IS_ERR(bcm4908_pinctrl->pctldev))
return dev_err_probe(dev, PTR_ERR(bcm4908_pinctrl->pctldev),
"Failed to register pinctrl\n");
/* Groups */
for (i = 0; i < ARRAY_SIZE(bcm4908_pinctrl_grps); i++) {
const struct bcm4908_pinctrl_grp *group = &bcm4908_pinctrl_grps[i];
int *pins;
int j;
pins = devm_kcalloc(dev, group->num_pins, sizeof(*pins), GFP_KERNEL);
if (!pins)
return -ENOMEM;
for (j = 0; j < group->num_pins; j++)
pins[j] = group->pins[j].number;
pinctrl_generic_add_group(bcm4908_pinctrl->pctldev, group->name,
pins, group->num_pins, (void *)group);
}
/* Functions */
for (i = 0; i < ARRAY_SIZE(bcm4908_pinctrl_functions); i++) {
const struct bcm4908_pinctrl_function *function = &bcm4908_pinctrl_functions[i];
pinmux_generic_add_function(bcm4908_pinctrl->pctldev,
function->name,
function->groups,
function->num_groups, NULL);
}
return 0;
}
static struct platform_driver bcm4908_pinctrl_driver = {
.probe = bcm4908_pinctrl_probe,
.driver = {
.name = "bcm4908-pinctrl",
.of_match_table = bcm4908_pinctrl_of_match_table,
},
};
module_platform_driver(bcm4908_pinctrl_driver);
MODULE_AUTHOR("Rafał Miłecki");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(of, bcm4908_pinctrl_of_match_table);
