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|
// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for BCM6328 GPIO unit (pinctrl + GPIO)
*
* Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
* Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
*/
#include <linux/bits.h>
#include <linux/gpio/driver.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "../pinctrl-utils.h"
#include "pinctrl-bcm63xx.h"
#define BCM6328_NUM_GPIOS 32
#define BCM6328_MODE_REG 0x18
#define BCM6328_MUX_HI_REG 0x1c
#define BCM6328_MUX_LO_REG 0x20
#define BCM6328_MUX_OTHER_REG 0x24
#define BCM6328_MUX_MASK GENMASK(1, 0)
struct bcm6328_pingroup {
const char *name;
const unsigned * const pins;
const unsigned num_pins;
};
struct bcm6328_function {
const char *name;
const char * const *groups;
const unsigned num_groups;
unsigned mode_val:1;
unsigned mux_val:2;
};
static const unsigned int bcm6328_mux[] = {
BCM6328_MUX_LO_REG,
BCM6328_MUX_HI_REG,
BCM6328_MUX_OTHER_REG
};
static const struct pinctrl_pin_desc bcm6328_pins[] = {
PINCTRL_PIN(0, "gpio0"),
PINCTRL_PIN(1, "gpio1"),
PINCTRL_PIN(2, "gpio2"),
PINCTRL_PIN(3, "gpio3"),
PINCTRL_PIN(4, "gpio4"),
PINCTRL_PIN(5, "gpio5"),
PINCTRL_PIN(6, "gpio6"),
PINCTRL_PIN(7, "gpio7"),
PINCTRL_PIN(8, "gpio8"),
PINCTRL_PIN(9, "gpio9"),
PINCTRL_PIN(10, "gpio10"),
PINCTRL_PIN(11, "gpio11"),
PINCTRL_PIN(12, "gpio12"),
PINCTRL_PIN(13, "gpio13"),
PINCTRL_PIN(14, "gpio14"),
PINCTRL_PIN(15, "gpio15"),
PINCTRL_PIN(16, "gpio16"),
PINCTRL_PIN(17, "gpio17"),
PINCTRL_PIN(18, "gpio18"),
PINCTRL_PIN(19, "gpio19"),
PINCTRL_PIN(20, "gpio20"),
PINCTRL_PIN(21, "gpio21"),
PINCTRL_PIN(22, "gpio22"),
PINCTRL_PIN(23, "gpio23"),
PINCTRL_PIN(24, "gpio24"),
PINCTRL_PIN(25, "gpio25"),
PINCTRL_PIN(26, "gpio26"),
PINCTRL_PIN(27, "gpio27"),
PINCTRL_PIN(28, "gpio28"),
PINCTRL_PIN(29, "gpio29"),
PINCTRL_PIN(30, "gpio30"),
PINCTRL_PIN(31, "gpio31"),
/*
* No idea where they really are; so let's put them according
* to their mux offsets.
*/
PINCTRL_PIN(36, "hsspi_cs1"),
PINCTRL_PIN(38, "usb_p2"),
};
static unsigned gpio0_pins[] = { 0 };
static unsigned gpio1_pins[] = { 1 };
static unsigned gpio2_pins[] = { 2 };
static unsigned gpio3_pins[] = { 3 };
static unsigned gpio4_pins[] = { 4 };
static unsigned gpio5_pins[] = { 5 };
static unsigned gpio6_pins[] = { 6 };
static unsigned gpio7_pins[] = { 7 };
static unsigned gpio8_pins[] = { 8 };
static unsigned gpio9_pins[] = { 9 };
static unsigned gpio10_pins[] = { 10 };
static unsigned gpio11_pins[] = { 11 };
static unsigned gpio12_pins[] = { 12 };
static unsigned gpio13_pins[] = { 13 };
static unsigned gpio14_pins[] = { 14 };
static unsigned gpio15_pins[] = { 15 };
static unsigned gpio16_pins[] = { 16 };
static unsigned gpio17_pins[] = { 17 };
static unsigned gpio18_pins[] = { 18 };
static unsigned gpio19_pins[] = { 19 };
static unsigned gpio20_pins[] = { 20 };
static unsigned gpio21_pins[] = { 21 };
static unsigned gpio22_pins[] = { 22 };
static unsigned gpio23_pins[] = { 23 };
static unsigned gpio24_pins[] = { 24 };
static unsigned gpio25_pins[] = { 25 };
static unsigned gpio26_pins[] = { 26 };
static unsigned gpio27_pins[] = { 27 };
static unsigned gpio28_pins[] = { 28 };
static unsigned gpio29_pins[] = { 29 };
static unsigned gpio30_pins[] = { 30 };
static unsigned gpio31_pins[] = { 31 };
static unsigned hsspi_cs1_pins[] = { 36 };
static unsigned usb_port1_pins[] = { 38 };
#define BCM6328_GROUP(n) \
{ \
.name = #n, \
.pins = n##_pins, \
.num_pins = ARRAY_SIZE(n##_pins), \
}
static struct bcm6328_pingroup bcm6328_groups[] = {
BCM6328_GROUP(gpio0),
BCM6328_GROUP(gpio1),
BCM6328_GROUP(gpio2),
BCM6328_GROUP(gpio3),
BCM6328_GROUP(gpio4),
BCM6328_GROUP(gpio5),
BCM6328_GROUP(gpio6),
BCM6328_GROUP(gpio7),
BCM6328_GROUP(gpio8),
BCM6328_GROUP(gpio9),
BCM6328_GROUP(gpio10),
BCM6328_GROUP(gpio11),
BCM6328_GROUP(gpio12),
BCM6328_GROUP(gpio13),
BCM6328_GROUP(gpio14),
BCM6328_GROUP(gpio15),
BCM6328_GROUP(gpio16),
BCM6328_GROUP(gpio17),
BCM6328_GROUP(gpio18),
BCM6328_GROUP(gpio19),
BCM6328_GROUP(gpio20),
BCM6328_GROUP(gpio21),
BCM6328_GROUP(gpio22),
BCM6328_GROUP(gpio23),
BCM6328_GROUP(gpio24),
BCM6328_GROUP(gpio25),
BCM6328_GROUP(gpio26),
BCM6328_GROUP(gpio27),
BCM6328_GROUP(gpio28),
BCM6328_GROUP(gpio29),
BCM6328_GROUP(gpio30),
BCM6328_GROUP(gpio31),
BCM6328_GROUP(hsspi_cs1),
BCM6328_GROUP(usb_port1),
};
/* GPIO_MODE */
static const char * const led_groups[] = {
"gpio0",
"gpio1",
"gpio2",
"gpio3",
"gpio4",
"gpio5",
"gpio6",
"gpio7",
"gpio8",
"gpio9",
"gpio10",
"gpio11",
"gpio12",
"gpio13",
"gpio14",
"gpio15",
"gpio16",
"gpio17",
"gpio18",
"gpio19",
"gpio20",
"gpio21",
"gpio22",
"gpio23",
};
/* PINMUX_SEL */
static const char * const serial_led_data_groups[] = {
"gpio6",
};
static const char * const serial_led_clk_groups[] = {
"gpio7",
};
static const char * const inet_act_led_groups[] = {
"gpio11",
};
static const char * const pcie_clkreq_groups[] = {
"gpio16",
};
static const char * const ephy0_act_led_groups[] = {
"gpio25",
};
static const char * const ephy1_act_led_groups[] = {
"gpio26",
};
static const char * const ephy2_act_led_groups[] = {
"gpio27",
};
static const char * const ephy3_act_led_groups[] = {
"gpio28",
};
static const char * const hsspi_cs1_groups[] = {
"hsspi_cs1"
};
static const char * const usb_host_port_groups[] = {
"usb_port1",
};
static const char * const usb_device_port_groups[] = {
"usb_port1",
};
#define BCM6328_MODE_FUN(n) \
{ \
.name = #n, \
.groups = n##_groups, \
.num_groups = ARRAY_SIZE(n##_groups), \
.mode_val = 1, \
}
#define BCM6328_MUX_FUN(n, mux) \
{ \
.name = #n, \
.groups = n##_groups, \
.num_groups = ARRAY_SIZE(n##_groups), \
.mux_val = mux, \
}
static const struct bcm6328_function bcm6328_funcs[] = {
BCM6328_MODE_FUN(led),
BCM6328_MUX_FUN(serial_led_data, 2),
BCM6328_MUX_FUN(serial_led_clk, 2),
BCM6328_MUX_FUN(inet_act_led, 1),
BCM6328_MUX_FUN(pcie_clkreq, 2),
BCM6328_MUX_FUN(ephy0_act_led, 1),
BCM6328_MUX_FUN(ephy1_act_led, 1),
BCM6328_MUX_FUN(ephy2_act_led, 1),
BCM6328_MUX_FUN(ephy3_act_led, 1),
BCM6328_MUX_FUN(hsspi_cs1, 2),
BCM6328_MUX_FUN(usb_host_port, 1),
BCM6328_MUX_FUN(usb_device_port, 2),
};
static inline unsigned int bcm6328_mux_off(unsigned int pin)
{
return bcm6328_mux[pin / 16];
}
static int bcm6328_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(bcm6328_groups);
}
static const char *bcm6328_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
return bcm6328_groups[group].name;
}
static int bcm6328_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group, const unsigned **pins,
unsigned *num_pins)
{
*pins = bcm6328_groups[group].pins;
*num_pins = bcm6328_groups[group].num_pins;
return 0;
}
static int bcm6328_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(bcm6328_funcs);
}
static const char *bcm6328_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
return bcm6328_funcs[selector].name;
}
static int bcm6328_pinctrl_get_groups(struct pinctrl_dev *pctldev,
unsigned selector,
const char * const **groups,
unsigned * const num_groups)
{
*groups = bcm6328_funcs[selector].groups;
*num_groups = bcm6328_funcs[selector].num_groups;
return 0;
}
static void bcm6328_rmw_mux(struct bcm63xx_pinctrl *pc, unsigned pin,
unsigned int mode, unsigned int mux)
{
if (pin < BCM6328_NUM_GPIOS)
regmap_update_bits(pc->regs, BCM6328_MODE_REG, BIT(pin),
mode ? BIT(pin) : 0);
regmap_update_bits(pc->regs, bcm6328_mux_off(pin),
BCM6328_MUX_MASK << ((pin % 16) * 2),
mux << ((pin % 16) * 2));
}
static int bcm6328_pinctrl_set_mux(struct pinctrl_dev *pctldev,
unsigned selector, unsigned group)
{
struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
const struct bcm6328_pingroup *pg = &bcm6328_groups[group];
const struct bcm6328_function *f = &bcm6328_funcs[selector];
bcm6328_rmw_mux(pc, pg->pins[0], f->mode_val, f->mux_val);
return 0;
}
static int bcm6328_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
/* disable all functions using this pin */
bcm6328_rmw_mux(pc, offset, 0, 0);
return 0;
}
static const struct pinctrl_ops bcm6328_pctl_ops = {
.dt_free_map = pinctrl_utils_free_map,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.get_group_name = bcm6328_pinctrl_get_group_name,
.get_group_pins = bcm6328_pinctrl_get_group_pins,
.get_groups_count = bcm6328_pinctrl_get_group_count,
};
static struct pinmux_ops bcm6328_pmx_ops = {
.get_function_groups = bcm6328_pinctrl_get_groups,
.get_function_name = bcm6328_pinctrl_get_func_name,
.get_functions_count = bcm6328_pinctrl_get_func_count,
.gpio_request_enable = bcm6328_gpio_request_enable,
.set_mux = bcm6328_pinctrl_set_mux,
.strict = true,
};
static const struct bcm63xx_pinctrl_soc bcm6328_soc = {
.ngpios = BCM6328_NUM_GPIOS,
.npins = ARRAY_SIZE(bcm6328_pins),
.pctl_ops = &bcm6328_pctl_ops,
.pins = bcm6328_pins,
.pmx_ops = &bcm6328_pmx_ops,
};
static int bcm6328_pinctrl_probe(struct platform_device *pdev)
{
return bcm63xx_pinctrl_probe(pdev, &bcm6328_soc, NULL);
}
static const struct of_device_id bcm6328_pinctrl_match[] = {
{ .compatible = "brcm,bcm6328-pinctrl", },
{ /* sentinel */ }
};
static struct platform_driver bcm6328_pinctrl_driver = {
.probe = bcm6328_pinctrl_probe,
.driver = {
.name = "bcm6328-pinctrl",
.of_match_table = bcm6328_pinctrl_match,
},
};
builtin_platform_driver(bcm6328_pinctrl_driver);
|
