| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Driver for BCM6368 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 BCM6368_NUM_GPIOS 38 |
| |
| #define BCM6368_MODE_REG 0x18 |
| #define BCM6368_BASEMODE_REG 0x38 |
| #define BCM6368_BASEMODE_MASK 0x7 |
| #define BCM6368_BASEMODE_GPIO 0x0 |
| #define BCM6368_BASEMODE_UART1 0x1 |
| |
| struct bcm6368_pingroup { |
| const char *name; |
| const unsigned * const pins; |
| const unsigned num_pins; |
| }; |
| |
| struct bcm6368_function { |
| const char *name; |
| const char * const *groups; |
| const unsigned num_groups; |
| |
| unsigned dir_out:16; |
| unsigned basemode:3; |
| }; |
| |
| struct bcm6368_priv { |
| struct regmap_field *overlays; |
| }; |
| |
| #define BCM6368_BASEMODE_PIN(a, b) \ |
| { \ |
| .number = a, \ |
| .name = b, \ |
| .drv_data = (void *)true \ |
| } |
| |
| static const struct pinctrl_pin_desc bcm6368_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"), |
| BCM6368_BASEMODE_PIN(30, "gpio30"), |
| BCM6368_BASEMODE_PIN(31, "gpio31"), |
| BCM6368_BASEMODE_PIN(32, "gpio32"), |
| BCM6368_BASEMODE_PIN(33, "gpio33"), |
| PINCTRL_PIN(34, "gpio34"), |
| PINCTRL_PIN(35, "gpio35"), |
| PINCTRL_PIN(36, "gpio36"), |
| PINCTRL_PIN(37, "gpio37"), |
| }; |
| |
| 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 uart1_grp_pins[] = { 30, 31, 32, 33 }; |
| |
| #define BCM6368_GROUP(n) \ |
| { \ |
| .name = #n, \ |
| .pins = n##_pins, \ |
| .num_pins = ARRAY_SIZE(n##_pins), \ |
| } |
| |
| static struct bcm6368_pingroup bcm6368_groups[] = { |
| BCM6368_GROUP(gpio0), |
| BCM6368_GROUP(gpio1), |
| BCM6368_GROUP(gpio2), |
| BCM6368_GROUP(gpio3), |
| BCM6368_GROUP(gpio4), |
| BCM6368_GROUP(gpio5), |
| BCM6368_GROUP(gpio6), |
| BCM6368_GROUP(gpio7), |
| BCM6368_GROUP(gpio8), |
| BCM6368_GROUP(gpio9), |
| BCM6368_GROUP(gpio10), |
| BCM6368_GROUP(gpio11), |
| BCM6368_GROUP(gpio12), |
| BCM6368_GROUP(gpio13), |
| BCM6368_GROUP(gpio14), |
| BCM6368_GROUP(gpio15), |
| BCM6368_GROUP(gpio16), |
| BCM6368_GROUP(gpio17), |
| BCM6368_GROUP(gpio18), |
| BCM6368_GROUP(gpio19), |
| BCM6368_GROUP(gpio20), |
| BCM6368_GROUP(gpio21), |
| BCM6368_GROUP(gpio22), |
| BCM6368_GROUP(gpio23), |
| BCM6368_GROUP(gpio24), |
| BCM6368_GROUP(gpio25), |
| BCM6368_GROUP(gpio26), |
| BCM6368_GROUP(gpio27), |
| BCM6368_GROUP(gpio28), |
| BCM6368_GROUP(gpio29), |
| BCM6368_GROUP(gpio30), |
| BCM6368_GROUP(gpio31), |
| BCM6368_GROUP(uart1_grp), |
| }; |
| |
| static const char * const analog_afe_0_groups[] = { |
| "gpio0", |
| }; |
| |
| static const char * const analog_afe_1_groups[] = { |
| "gpio1", |
| }; |
| |
| static const char * const sys_irq_groups[] = { |
| "gpio2", |
| }; |
| |
| static const char * const serial_led_data_groups[] = { |
| "gpio3", |
| }; |
| |
| static const char * const serial_led_clk_groups[] = { |
| "gpio4", |
| }; |
| |
| static const char * const inet_led_groups[] = { |
| "gpio5", |
| }; |
| |
| static const char * const ephy0_led_groups[] = { |
| "gpio6", |
| }; |
| |
| static const char * const ephy1_led_groups[] = { |
| "gpio7", |
| }; |
| |
| static const char * const ephy2_led_groups[] = { |
| "gpio8", |
| }; |
| |
| static const char * const ephy3_led_groups[] = { |
| "gpio9", |
| }; |
| |
| static const char * const robosw_led_data_groups[] = { |
| "gpio10", |
| }; |
| |
| static const char * const robosw_led_clk_groups[] = { |
| "gpio11", |
| }; |
| |
| static const char * const robosw_led0_groups[] = { |
| "gpio12", |
| }; |
| |
| static const char * const robosw_led1_groups[] = { |
| "gpio13", |
| }; |
| |
| static const char * const usb_device_led_groups[] = { |
| "gpio14", |
| }; |
| |
| static const char * const pci_req1_groups[] = { |
| "gpio16", |
| }; |
| |
| static const char * const pci_gnt1_groups[] = { |
| "gpio17", |
| }; |
| |
| static const char * const pci_intb_groups[] = { |
| "gpio18", |
| }; |
| |
| static const char * const pci_req0_groups[] = { |
| "gpio19", |
| }; |
| |
| static const char * const pci_gnt0_groups[] = { |
| "gpio20", |
| }; |
| |
| static const char * const pcmcia_cd1_groups[] = { |
| "gpio22", |
| }; |
| |
| static const char * const pcmcia_cd2_groups[] = { |
| "gpio23", |
| }; |
| |
| static const char * const pcmcia_vs1_groups[] = { |
| "gpio24", |
| }; |
| |
| static const char * const pcmcia_vs2_groups[] = { |
| "gpio25", |
| }; |
| |
| static const char * const ebi_cs2_groups[] = { |
| "gpio26", |
| }; |
| |
| static const char * const ebi_cs3_groups[] = { |
| "gpio27", |
| }; |
| |
| static const char * const spi_cs2_groups[] = { |
| "gpio28", |
| }; |
| |
| static const char * const spi_cs3_groups[] = { |
| "gpio29", |
| }; |
| |
| static const char * const spi_cs4_groups[] = { |
| "gpio30", |
| }; |
| |
| static const char * const spi_cs5_groups[] = { |
| "gpio31", |
| }; |
| |
| static const char * const uart1_groups[] = { |
| "uart1_grp", |
| }; |
| |
| #define BCM6368_FUN(n, out) \ |
| { \ |
| .name = #n, \ |
| .groups = n##_groups, \ |
| .num_groups = ARRAY_SIZE(n##_groups), \ |
| .dir_out = out, \ |
| } |
| |
| #define BCM6368_BASEMODE_FUN(n, val, out) \ |
| { \ |
| .name = #n, \ |
| .groups = n##_groups, \ |
| .num_groups = ARRAY_SIZE(n##_groups), \ |
| .basemode = BCM6368_BASEMODE_##val, \ |
| .dir_out = out, \ |
| } |
| |
| static const struct bcm6368_function bcm6368_funcs[] = { |
| BCM6368_FUN(analog_afe_0, 1), |
| BCM6368_FUN(analog_afe_1, 1), |
| BCM6368_FUN(sys_irq, 1), |
| BCM6368_FUN(serial_led_data, 1), |
| BCM6368_FUN(serial_led_clk, 1), |
| BCM6368_FUN(inet_led, 1), |
| BCM6368_FUN(ephy0_led, 1), |
| BCM6368_FUN(ephy1_led, 1), |
| BCM6368_FUN(ephy2_led, 1), |
| BCM6368_FUN(ephy3_led, 1), |
| BCM6368_FUN(robosw_led_data, 1), |
| BCM6368_FUN(robosw_led_clk, 1), |
| BCM6368_FUN(robosw_led0, 1), |
| BCM6368_FUN(robosw_led1, 1), |
| BCM6368_FUN(usb_device_led, 1), |
| BCM6368_FUN(pci_req1, 0), |
| BCM6368_FUN(pci_gnt1, 0), |
| BCM6368_FUN(pci_intb, 0), |
| BCM6368_FUN(pci_req0, 0), |
| BCM6368_FUN(pci_gnt0, 0), |
| BCM6368_FUN(pcmcia_cd1, 0), |
| BCM6368_FUN(pcmcia_cd2, 0), |
| BCM6368_FUN(pcmcia_vs1, 0), |
| BCM6368_FUN(pcmcia_vs2, 0), |
| BCM6368_FUN(ebi_cs2, 1), |
| BCM6368_FUN(ebi_cs3, 1), |
| BCM6368_FUN(spi_cs2, 1), |
| BCM6368_FUN(spi_cs3, 1), |
| BCM6368_FUN(spi_cs4, 1), |
| BCM6368_FUN(spi_cs5, 1), |
| BCM6368_BASEMODE_FUN(uart1, UART1, 0x6), |
| }; |
| |
| static int bcm6368_pinctrl_get_group_count(struct pinctrl_dev *pctldev) |
| { |
| return ARRAY_SIZE(bcm6368_groups); |
| } |
| |
| static const char *bcm6368_pinctrl_get_group_name(struct pinctrl_dev *pctldev, |
| unsigned group) |
| { |
| return bcm6368_groups[group].name; |
| } |
| |
| static int bcm6368_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, |
| unsigned group, const unsigned **pins, |
| unsigned *num_pins) |
| { |
| *pins = bcm6368_groups[group].pins; |
| *num_pins = bcm6368_groups[group].num_pins; |
| |
| return 0; |
| } |
| |
| static int bcm6368_pinctrl_get_func_count(struct pinctrl_dev *pctldev) |
| { |
| return ARRAY_SIZE(bcm6368_funcs); |
| } |
| |
| static const char *bcm6368_pinctrl_get_func_name(struct pinctrl_dev *pctldev, |
| unsigned selector) |
| { |
| return bcm6368_funcs[selector].name; |
| } |
| |
| static int bcm6368_pinctrl_get_groups(struct pinctrl_dev *pctldev, |
| unsigned selector, |
| const char * const **groups, |
| unsigned * const num_groups) |
| { |
| *groups = bcm6368_funcs[selector].groups; |
| *num_groups = bcm6368_funcs[selector].num_groups; |
| |
| return 0; |
| } |
| |
| static int bcm6368_pinctrl_set_mux(struct pinctrl_dev *pctldev, |
| unsigned selector, unsigned group) |
| { |
| struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); |
| struct bcm6368_priv *priv = pc->driver_data; |
| const struct bcm6368_pingroup *pg = &bcm6368_groups[group]; |
| const struct bcm6368_function *fun = &bcm6368_funcs[selector]; |
| int i, pin; |
| |
| if (fun->basemode) { |
| unsigned int mask = 0; |
| |
| for (i = 0; i < pg->num_pins; i++) { |
| pin = pg->pins[i]; |
| if (pin < BCM63XX_BANK_GPIOS) |
| mask |= BIT(pin); |
| } |
| |
| regmap_update_bits(pc->regs, BCM6368_MODE_REG, mask, 0); |
| regmap_field_write(priv->overlays, fun->basemode); |
| } else { |
| pin = pg->pins[0]; |
| |
| if (bcm6368_pins[pin].drv_data) |
| regmap_field_write(priv->overlays, |
| BCM6368_BASEMODE_GPIO); |
| |
| regmap_update_bits(pc->regs, BCM6368_MODE_REG, BIT(pin), |
| BIT(pin)); |
| } |
| |
| for (pin = 0; pin < pg->num_pins; pin++) { |
| struct pinctrl_gpio_range *range; |
| int hw_gpio = bcm6368_pins[pin].number; |
| |
| range = pinctrl_find_gpio_range_from_pin(pctldev, hw_gpio); |
| if (range) { |
| struct gpio_chip *gc = range->gc; |
| |
| if (fun->dir_out & BIT(pin)) |
| gc->direction_output(gc, hw_gpio, 0); |
| else |
| gc->direction_input(gc, hw_gpio); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int bcm6368_gpio_request_enable(struct pinctrl_dev *pctldev, |
| struct pinctrl_gpio_range *range, |
| unsigned offset) |
| { |
| struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); |
| struct bcm6368_priv *priv = pc->driver_data; |
| |
| if (offset >= BCM63XX_BANK_GPIOS && !bcm6368_pins[offset].drv_data) |
| return 0; |
| |
| /* disable all functions using this pin */ |
| if (offset < BCM63XX_BANK_GPIOS) |
| regmap_update_bits(pc->regs, BCM6368_MODE_REG, BIT(offset), 0); |
| |
| if (bcm6368_pins[offset].drv_data) |
| regmap_field_write(priv->overlays, BCM6368_BASEMODE_GPIO); |
| |
| return 0; |
| } |
| |
| static const struct pinctrl_ops bcm6368_pctl_ops = { |
| .dt_free_map = pinctrl_utils_free_map, |
| .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, |
| .get_group_name = bcm6368_pinctrl_get_group_name, |
| .get_group_pins = bcm6368_pinctrl_get_group_pins, |
| .get_groups_count = bcm6368_pinctrl_get_group_count, |
| }; |
| |
| static const struct pinmux_ops bcm6368_pmx_ops = { |
| .get_function_groups = bcm6368_pinctrl_get_groups, |
| .get_function_name = bcm6368_pinctrl_get_func_name, |
| .get_functions_count = bcm6368_pinctrl_get_func_count, |
| .gpio_request_enable = bcm6368_gpio_request_enable, |
| .set_mux = bcm6368_pinctrl_set_mux, |
| .strict = true, |
| }; |
| |
| static const struct bcm63xx_pinctrl_soc bcm6368_soc = { |
| .ngpios = BCM6368_NUM_GPIOS, |
| .npins = ARRAY_SIZE(bcm6368_pins), |
| .pctl_ops = &bcm6368_pctl_ops, |
| .pins = bcm6368_pins, |
| .pmx_ops = &bcm6368_pmx_ops, |
| }; |
| |
| static int bcm6368_pinctrl_probe(struct platform_device *pdev) |
| { |
| struct reg_field overlays = REG_FIELD(BCM6368_BASEMODE_REG, 0, 15); |
| struct device *dev = &pdev->dev; |
| struct bcm63xx_pinctrl *pc; |
| struct bcm6368_priv *priv; |
| int err; |
| |
| priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| |
| err = bcm63xx_pinctrl_probe(pdev, &bcm6368_soc, (void *) priv); |
| if (err) |
| return err; |
| |
| pc = platform_get_drvdata(pdev); |
| |
| priv->overlays = devm_regmap_field_alloc(dev, pc->regs, overlays); |
| if (IS_ERR(priv->overlays)) |
| return PTR_ERR(priv->overlays); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id bcm6368_pinctrl_match[] = { |
| { .compatible = "brcm,bcm6368-pinctrl", }, |
| { /* sentinel */ } |
| }; |
| |
| static struct platform_driver bcm6368_pinctrl_driver = { |
| .probe = bcm6368_pinctrl_probe, |
| .driver = { |
| .name = "bcm6368-pinctrl", |
| .of_match_table = bcm6368_pinctrl_match, |
| }, |
| }; |
| |
| builtin_platform_driver(bcm6368_pinctrl_driver); |
