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linux-sg2042/drivers/pinctrl/bcm/pinctrl-ns.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Rafał Miłecki <rafal@milecki.pl>
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define FLAG_BCM4708 BIT(1)
#define FLAG_BCM4709 BIT(2)
#define FLAG_BCM53012 BIT(3)
struct ns_pinctrl {
struct device *dev;
unsigned int chipset_flag;
struct pinctrl_dev *pctldev;
struct regmap *regmap;
u32 offset;
struct pinctrl_desc pctldesc;
struct ns_pinctrl_group *groups;
unsigned int num_groups;
struct ns_pinctrl_function *functions;
unsigned int num_functions;
};
/*
* Pins
*/
static const struct pinctrl_pin_desc ns_pinctrl_pins[] = {
{ 0, "spi_clk", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 1, "spi_ss", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 2, "spi_mosi", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 3, "spi_miso", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 4, "i2c_scl", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 5, "i2c_sda", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 6, "mdc", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 7, "mdio", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 8, "pwm0", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 9, "pwm1", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 10, "pwm2", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 11, "pwm3", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 12, "uart1_rx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 13, "uart1_tx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 14, "uart1_cts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 15, "uart1_rts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 16, "uart2_rx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 17, "uart2_tx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
/* TODO { ??, "xtal_out", (void *)(FLAG_BCM4709) }, */
{ 22, "sdio_pwr", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 23, "sdio_en_1p8v", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
};
/*
* Groups
*/
struct ns_pinctrl_group {
const char *name;
const unsigned int *pins;
const unsigned int num_pins;
unsigned int chipsets;
};
static const unsigned int spi_pins[] = { 0, 1, 2, 3 };
static const unsigned int i2c_pins[] = { 4, 5 };
static const unsigned int mdio_pins[] = { 6, 7 };
static const unsigned int pwm0_pins[] = { 8 };
static const unsigned int pwm1_pins[] = { 9 };
static const unsigned int pwm2_pins[] = { 10 };
static const unsigned int pwm3_pins[] = { 11 };
static const unsigned int uart1_pins[] = { 12, 13, 14, 15 };
static const unsigned int uart2_pins[] = { 16, 17 };
static const unsigned int sdio_pwr_pins[] = { 22 };
static const unsigned int sdio_1p8v_pins[] = { 23 };
#define NS_GROUP(_name, _pins, _chipsets) \
{ \
.name = _name, \
.pins = _pins, \
.num_pins = ARRAY_SIZE(_pins), \
.chipsets = _chipsets, \
}
static const struct ns_pinctrl_group ns_pinctrl_groups[] = {
NS_GROUP("spi_grp", spi_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("i2c_grp", i2c_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("mdio_grp", mdio_pins, FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm0_grp", pwm0_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm1_grp", pwm1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm2_grp", pwm2_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm3_grp", pwm3_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("uart1_grp", uart1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("uart2_grp", uart2_pins, FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("sdio_pwr_grp", sdio_pwr_pins, FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("sdio_1p8v_grp", sdio_1p8v_pins, FLAG_BCM4709 | FLAG_BCM53012),
};
/*
* Functions
*/
struct ns_pinctrl_function {
const char *name;
const char * const *groups;
const unsigned int num_groups;
unsigned int chipsets;
};
static const char * const spi_groups[] = { "spi_grp" };
static const char * const i2c_groups[] = { "i2c_grp" };
static const char * const mdio_groups[] = { "mdio_grp" };
static const char * const pwm_groups[] = { "pwm0_grp", "pwm1_grp", "pwm2_grp",
"pwm3_grp" };
static const char * const uart1_groups[] = { "uart1_grp" };
static const char * const uart2_groups[] = { "uart2_grp" };
static const char * const sdio_groups[] = { "sdio_pwr_grp", "sdio_1p8v_grp" };
#define NS_FUNCTION(_name, _groups, _chipsets) \
{ \
.name = _name, \
.groups = _groups, \
.num_groups = ARRAY_SIZE(_groups), \
.chipsets = _chipsets, \
}
static const struct ns_pinctrl_function ns_pinctrl_functions[] = {
NS_FUNCTION("spi", spi_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("i2c", i2c_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("mdio", mdio_groups, FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("pwm", pwm_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("uart1", uart1_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("uart2", uart2_groups, FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("sdio", sdio_groups, FLAG_BCM4709 | FLAG_BCM53012),
};
/*
* Groups code
*/
static int ns_pinctrl_get_groups_count(struct pinctrl_dev *pctrl_dev)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return ns_pinctrl->num_groups;
}
static const char *ns_pinctrl_get_group_name(struct pinctrl_dev *pctrl_dev,
unsigned int selector)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return ns_pinctrl->groups[selector].name;
}
static int ns_pinctrl_get_group_pins(struct pinctrl_dev *pctrl_dev,
unsigned int selector,
const unsigned int **pins,
unsigned int *num_pins)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
*pins = ns_pinctrl->groups[selector].pins;
*num_pins = ns_pinctrl->groups[selector].num_pins;
return 0;
}
static const struct pinctrl_ops ns_pinctrl_ops = {
.get_groups_count = ns_pinctrl_get_groups_count,
.get_group_name = ns_pinctrl_get_group_name,
.get_group_pins = ns_pinctrl_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 ns_pinctrl_get_functions_count(struct pinctrl_dev *pctrl_dev)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return ns_pinctrl->num_functions;
}
static const char *ns_pinctrl_get_function_name(struct pinctrl_dev *pctrl_dev,
unsigned int selector)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return ns_pinctrl->functions[selector].name;
}
static int ns_pinctrl_get_function_groups(struct pinctrl_dev *pctrl_dev,
unsigned int selector,
const char * const **groups,
unsigned * const num_groups)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
*groups = ns_pinctrl->functions[selector].groups;
*num_groups = ns_pinctrl->functions[selector].num_groups;
return 0;
}
static int ns_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,
unsigned int func_select,
unsigned int grp_select)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
u32 unset = 0;
u32 tmp;
int i;
for (i = 0; i < ns_pinctrl->groups[grp_select].num_pins; i++) {
int pin_number = ns_pinctrl->groups[grp_select].pins[i];
unset |= BIT(pin_number);
}
regmap_read(ns_pinctrl->regmap, ns_pinctrl->offset, &tmp);
tmp &= ~unset;
regmap_write(ns_pinctrl->regmap, ns_pinctrl->offset, tmp);
return 0;
}
static const struct pinmux_ops ns_pinctrl_pmxops = {
.get_functions_count = ns_pinctrl_get_functions_count,
.get_function_name = ns_pinctrl_get_function_name,
.get_function_groups = ns_pinctrl_get_function_groups,
.set_mux = ns_pinctrl_set_mux,
};
/*
* Controller code
*/
static struct pinctrl_desc ns_pinctrl_desc = {
.name = "pinctrl-ns",
.pctlops = &ns_pinctrl_ops,
.pmxops = &ns_pinctrl_pmxops,
};
static const struct of_device_id ns_pinctrl_of_match_table[] = {
{ .compatible = "brcm,bcm4708-pinmux", .data = (void *)FLAG_BCM4708, },
{ .compatible = "brcm,bcm4709-pinmux", .data = (void *)FLAG_BCM4709, },
{ .compatible = "brcm,bcm53012-pinmux", .data = (void *)FLAG_BCM53012, },
{ }
};
static int ns_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
const struct of_device_id *of_id;
struct ns_pinctrl *ns_pinctrl;
struct pinctrl_desc *pctldesc;
struct pinctrl_pin_desc *pin;
struct ns_pinctrl_group *group;
struct ns_pinctrl_function *function;
int i;
ns_pinctrl = devm_kzalloc(dev, sizeof(*ns_pinctrl), GFP_KERNEL);
if (!ns_pinctrl)
return -ENOMEM;
pctldesc = &ns_pinctrl->pctldesc;
platform_set_drvdata(pdev, ns_pinctrl);
/* Set basic properties */
ns_pinctrl->dev = dev;
of_id = of_match_device(ns_pinctrl_of_match_table, dev);
if (!of_id)
return -EINVAL;
ns_pinctrl->chipset_flag = (uintptr_t)of_id->data;
ns_pinctrl->regmap = syscon_node_to_regmap(of_get_parent(np));
if (IS_ERR(ns_pinctrl->regmap)) {
int err = PTR_ERR(ns_pinctrl->regmap);
dev_err(dev, "Failed to map pinctrl regs: %d\n", err);
return err;
}
if (of_property_read_u32(np, "offset", &ns_pinctrl->offset)) {
dev_err(dev, "Failed to get register offset\n");
return -ENOENT;
}
memcpy(pctldesc, &ns_pinctrl_desc, sizeof(*pctldesc));
/* Set pinctrl properties */
pctldesc->pins = devm_kcalloc(dev, ARRAY_SIZE(ns_pinctrl_pins),
sizeof(struct pinctrl_pin_desc),
GFP_KERNEL);
if (!pctldesc->pins)
return -ENOMEM;
for (i = 0, pin = (struct pinctrl_pin_desc *)&pctldesc->pins[0];
i < ARRAY_SIZE(ns_pinctrl_pins); i++) {
const struct pinctrl_pin_desc *src = &ns_pinctrl_pins[i];
unsigned int chipsets = (uintptr_t)src->drv_data;
if (chipsets & ns_pinctrl->chipset_flag) {
memcpy(pin++, src, sizeof(*src));
pctldesc->npins++;
}
}
ns_pinctrl->groups = devm_kcalloc(dev, ARRAY_SIZE(ns_pinctrl_groups),
sizeof(struct ns_pinctrl_group),
GFP_KERNEL);
if (!ns_pinctrl->groups)
return -ENOMEM;
for (i = 0, group = &ns_pinctrl->groups[0];
i < ARRAY_SIZE(ns_pinctrl_groups); i++) {
const struct ns_pinctrl_group *src = &ns_pinctrl_groups[i];
if (src->chipsets & ns_pinctrl->chipset_flag) {
memcpy(group++, src, sizeof(*src));
ns_pinctrl->num_groups++;
}
}
ns_pinctrl->functions = devm_kcalloc(dev,
ARRAY_SIZE(ns_pinctrl_functions),
sizeof(struct ns_pinctrl_function),
GFP_KERNEL);
if (!ns_pinctrl->functions)
return -ENOMEM;
for (i = 0, function = &ns_pinctrl->functions[0];
i < ARRAY_SIZE(ns_pinctrl_functions); i++) {
const struct ns_pinctrl_function *src = &ns_pinctrl_functions[i];
if (src->chipsets & ns_pinctrl->chipset_flag) {
memcpy(function++, src, sizeof(*src));
ns_pinctrl->num_functions++;
}
}
/* Register */
ns_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, ns_pinctrl);
if (IS_ERR(ns_pinctrl->pctldev)) {
dev_err(dev, "Failed to register pinctrl\n");
return PTR_ERR(ns_pinctrl->pctldev);
}
return 0;
}
static struct platform_driver ns_pinctrl_driver = {
.probe = ns_pinctrl_probe,
.driver = {
.name = "ns-pinmux",
.of_match_table = ns_pinctrl_of_match_table,
},
};
module_platform_driver(ns_pinctrl_driver);
MODULE_AUTHOR("Rafał Miłecki");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(of, ns_pinctrl_of_match_table);
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