| // 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_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 }; |
| |
| static struct pingroup bcm6328_groups[] = { |
| BCM_PIN_GROUP(gpio0), |
| BCM_PIN_GROUP(gpio1), |
| BCM_PIN_GROUP(gpio2), |
| BCM_PIN_GROUP(gpio3), |
| BCM_PIN_GROUP(gpio4), |
| BCM_PIN_GROUP(gpio5), |
| BCM_PIN_GROUP(gpio6), |
| BCM_PIN_GROUP(gpio7), |
| BCM_PIN_GROUP(gpio8), |
| BCM_PIN_GROUP(gpio9), |
| BCM_PIN_GROUP(gpio10), |
| BCM_PIN_GROUP(gpio11), |
| BCM_PIN_GROUP(gpio12), |
| BCM_PIN_GROUP(gpio13), |
| BCM_PIN_GROUP(gpio14), |
| BCM_PIN_GROUP(gpio15), |
| BCM_PIN_GROUP(gpio16), |
| BCM_PIN_GROUP(gpio17), |
| BCM_PIN_GROUP(gpio18), |
| BCM_PIN_GROUP(gpio19), |
| BCM_PIN_GROUP(gpio20), |
| BCM_PIN_GROUP(gpio21), |
| BCM_PIN_GROUP(gpio22), |
| BCM_PIN_GROUP(gpio23), |
| BCM_PIN_GROUP(gpio24), |
| BCM_PIN_GROUP(gpio25), |
| BCM_PIN_GROUP(gpio26), |
| BCM_PIN_GROUP(gpio27), |
| BCM_PIN_GROUP(gpio28), |
| BCM_PIN_GROUP(gpio29), |
| BCM_PIN_GROUP(gpio30), |
| BCM_PIN_GROUP(gpio31), |
| |
| BCM_PIN_GROUP(hsspi_cs1), |
| BCM_PIN_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 *npins) |
| { |
| *pins = bcm6328_groups[group].pins; |
| *npins = bcm6328_groups[group].npins; |
| |
| 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 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 const 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); |
