405 lines
9.6 KiB
C
405 lines
9.6 KiB
C
// 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 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);
|