// SPDX-License-Identifier: GPL-2.0+ /* * Driver for BCM6362 GPIO unit (pinctrl + GPIO) * * Copyright (C) 2021 Álvaro Fernández Rojas * Copyright (C) 2016 Jonas Gorski */ #include #include #include #include #include #include #include #include "../pinctrl-utils.h" #include "pinctrl-bcm63xx.h" #define BCM6362_BANK_GPIOS 32 #define BCM6362_NUM_GPIOS 48 #define BCM6362_NUM_LEDS 24 #define BCM6362_LED_REG 0x10 #define BCM6362_MODE_REG 0x18 #define BCM6362_CTRL_REG 0x1c #define BCM6362_BASEMODE_REG 0x38 #define BASEMODE_NAND BIT(2) enum bcm6362_pinctrl_reg { BCM6362_LEDCTRL, BCM6362_MODE, BCM6362_CTRL, BCM6362_BASEMODE, }; struct bcm6362_pingroup { const char *name; const unsigned * const pins; const unsigned num_pins; }; struct bcm6362_function { const char *name; const char * const *groups; const unsigned num_groups; enum bcm6362_pinctrl_reg reg; uint32_t basemode_mask; }; #define BCM6362_PIN(a, b, mask) \ { \ .number = a, \ .name = b, \ .drv_data = (void *)(mask), \ } static const struct pinctrl_pin_desc bcm6362_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"), BCM6362_PIN(8, "gpio8", BASEMODE_NAND), PINCTRL_PIN(9, "gpio9"), PINCTRL_PIN(10, "gpio10"), PINCTRL_PIN(11, "gpio11"), BCM6362_PIN(12, "gpio12", BASEMODE_NAND), BCM6362_PIN(13, "gpio13", BASEMODE_NAND), BCM6362_PIN(14, "gpio14", BASEMODE_NAND), BCM6362_PIN(15, "gpio15", BASEMODE_NAND), BCM6362_PIN(16, "gpio16", BASEMODE_NAND), BCM6362_PIN(17, "gpio17", BASEMODE_NAND), BCM6362_PIN(18, "gpio18", BASEMODE_NAND), BCM6362_PIN(19, "gpio19", BASEMODE_NAND), BCM6362_PIN(20, "gpio20", BASEMODE_NAND), BCM6362_PIN(21, "gpio21", BASEMODE_NAND), BCM6362_PIN(22, "gpio22", BASEMODE_NAND), BCM6362_PIN(23, "gpio23", BASEMODE_NAND), PINCTRL_PIN(24, "gpio24"), PINCTRL_PIN(25, "gpio25"), PINCTRL_PIN(26, "gpio26"), BCM6362_PIN(27, "gpio27", BASEMODE_NAND), PINCTRL_PIN(28, "gpio28"), PINCTRL_PIN(29, "gpio29"), PINCTRL_PIN(30, "gpio30"), PINCTRL_PIN(31, "gpio31"), PINCTRL_PIN(32, "gpio32"), PINCTRL_PIN(33, "gpio33"), PINCTRL_PIN(34, "gpio34"), PINCTRL_PIN(35, "gpio35"), PINCTRL_PIN(36, "gpio36"), PINCTRL_PIN(37, "gpio37"), PINCTRL_PIN(38, "gpio38"), PINCTRL_PIN(39, "gpio39"), PINCTRL_PIN(40, "gpio40"), PINCTRL_PIN(41, "gpio41"), PINCTRL_PIN(42, "gpio42"), PINCTRL_PIN(43, "gpio43"), PINCTRL_PIN(44, "gpio44"), PINCTRL_PIN(45, "gpio45"), PINCTRL_PIN(46, "gpio46"), PINCTRL_PIN(47, "gpio47"), }; 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 gpio32_pins[] = { 32 }; static unsigned gpio33_pins[] = { 33 }; static unsigned gpio34_pins[] = { 34 }; static unsigned gpio35_pins[] = { 35 }; static unsigned gpio36_pins[] = { 36 }; static unsigned gpio37_pins[] = { 37 }; static unsigned gpio38_pins[] = { 38 }; static unsigned gpio39_pins[] = { 39 }; static unsigned gpio40_pins[] = { 40 }; static unsigned gpio41_pins[] = { 41 }; static unsigned gpio42_pins[] = { 42 }; static unsigned gpio43_pins[] = { 43 }; static unsigned gpio44_pins[] = { 44 }; static unsigned gpio45_pins[] = { 45 }; static unsigned gpio46_pins[] = { 46 }; static unsigned gpio47_pins[] = { 47 }; static unsigned nand_grp_pins[] = { 8, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 27, }; #define BCM6362_GROUP(n) \ { \ .name = #n, \ .pins = n##_pins, \ .num_pins = ARRAY_SIZE(n##_pins), \ } static struct bcm6362_pingroup bcm6362_groups[] = { BCM6362_GROUP(gpio0), BCM6362_GROUP(gpio1), BCM6362_GROUP(gpio2), BCM6362_GROUP(gpio3), BCM6362_GROUP(gpio4), BCM6362_GROUP(gpio5), BCM6362_GROUP(gpio6), BCM6362_GROUP(gpio7), BCM6362_GROUP(gpio8), BCM6362_GROUP(gpio9), BCM6362_GROUP(gpio10), BCM6362_GROUP(gpio11), BCM6362_GROUP(gpio12), BCM6362_GROUP(gpio13), BCM6362_GROUP(gpio14), BCM6362_GROUP(gpio15), BCM6362_GROUP(gpio16), BCM6362_GROUP(gpio17), BCM6362_GROUP(gpio18), BCM6362_GROUP(gpio19), BCM6362_GROUP(gpio20), BCM6362_GROUP(gpio21), BCM6362_GROUP(gpio22), BCM6362_GROUP(gpio23), BCM6362_GROUP(gpio24), BCM6362_GROUP(gpio25), BCM6362_GROUP(gpio26), BCM6362_GROUP(gpio27), BCM6362_GROUP(gpio28), BCM6362_GROUP(gpio29), BCM6362_GROUP(gpio30), BCM6362_GROUP(gpio31), BCM6362_GROUP(gpio32), BCM6362_GROUP(gpio33), BCM6362_GROUP(gpio34), BCM6362_GROUP(gpio35), BCM6362_GROUP(gpio36), BCM6362_GROUP(gpio37), BCM6362_GROUP(gpio38), BCM6362_GROUP(gpio39), BCM6362_GROUP(gpio40), BCM6362_GROUP(gpio41), BCM6362_GROUP(gpio42), BCM6362_GROUP(gpio43), BCM6362_GROUP(gpio44), BCM6362_GROUP(gpio45), BCM6362_GROUP(gpio46), BCM6362_GROUP(gpio47), BCM6362_GROUP(nand_grp), }; 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", }; static const char * const usb_device_led_groups[] = { "gpio0", }; static const char * const sys_irq_groups[] = { "gpio1", }; static const char * const serial_led_clk_groups[] = { "gpio2", }; static const char * const serial_led_data_groups[] = { "gpio3", }; static const char * const robosw_led_data_groups[] = { "gpio4", }; static const char * const robosw_led_clk_groups[] = { "gpio5", }; static const char * const robosw_led0_groups[] = { "gpio6", }; static const char * const robosw_led1_groups[] = { "gpio7", }; static const char * const inet_led_groups[] = { "gpio8", }; static const char * const spi_cs2_groups[] = { "gpio9", }; static const char * const spi_cs3_groups[] = { "gpio10", }; static const char * const ntr_pulse_groups[] = { "gpio11", }; static const char * const uart1_scts_groups[] = { "gpio12", }; static const char * const uart1_srts_groups[] = { "gpio13", }; static const char * const uart1_sdin_groups[] = { "gpio14", }; static const char * const uart1_sdout_groups[] = { "gpio15", }; static const char * const adsl_spi_miso_groups[] = { "gpio16", }; static const char * const adsl_spi_mosi_groups[] = { "gpio17", }; static const char * const adsl_spi_clk_groups[] = { "gpio18", }; static const char * const adsl_spi_cs_groups[] = { "gpio19", }; static const char * const ephy0_led_groups[] = { "gpio20", }; static const char * const ephy1_led_groups[] = { "gpio21", }; static const char * const ephy2_led_groups[] = { "gpio22", }; static const char * const ephy3_led_groups[] = { "gpio23", }; static const char * const ext_irq0_groups[] = { "gpio24", }; static const char * const ext_irq1_groups[] = { "gpio25", }; static const char * const ext_irq2_groups[] = { "gpio26", }; static const char * const ext_irq3_groups[] = { "gpio27", }; static const char * const wifi_groups[] = { "gpio32", "gpio33", "gpio34", "gpio35", "gpio36", "gpio37", "gpio38", "gpio39", "gpio40", "gpio41", "gpio42", "gpio43", "gpio44", "gpio45", "gpio46", "gpio47", }; static const char * const nand_groups[] = { "nand_grp", }; #define BCM6362_LED_FUN(n) \ { \ .name = #n, \ .groups = n##_groups, \ .num_groups = ARRAY_SIZE(n##_groups), \ .reg = BCM6362_LEDCTRL, \ } #define BCM6362_MODE_FUN(n) \ { \ .name = #n, \ .groups = n##_groups, \ .num_groups = ARRAY_SIZE(n##_groups), \ .reg = BCM6362_MODE, \ } #define BCM6362_CTRL_FUN(n) \ { \ .name = #n, \ .groups = n##_groups, \ .num_groups = ARRAY_SIZE(n##_groups), \ .reg = BCM6362_CTRL, \ } #define BCM6362_BASEMODE_FUN(n, mask) \ { \ .name = #n, \ .groups = n##_groups, \ .num_groups = ARRAY_SIZE(n##_groups), \ .reg = BCM6362_BASEMODE, \ .basemode_mask = (mask), \ } static const struct bcm6362_function bcm6362_funcs[] = { BCM6362_LED_FUN(led), BCM6362_MODE_FUN(usb_device_led), BCM6362_MODE_FUN(sys_irq), BCM6362_MODE_FUN(serial_led_clk), BCM6362_MODE_FUN(serial_led_data), BCM6362_MODE_FUN(robosw_led_data), BCM6362_MODE_FUN(robosw_led_clk), BCM6362_MODE_FUN(robosw_led0), BCM6362_MODE_FUN(robosw_led1), BCM6362_MODE_FUN(inet_led), BCM6362_MODE_FUN(spi_cs2), BCM6362_MODE_FUN(spi_cs3), BCM6362_MODE_FUN(ntr_pulse), BCM6362_MODE_FUN(uart1_scts), BCM6362_MODE_FUN(uart1_srts), BCM6362_MODE_FUN(uart1_sdin), BCM6362_MODE_FUN(uart1_sdout), BCM6362_MODE_FUN(adsl_spi_miso), BCM6362_MODE_FUN(adsl_spi_mosi), BCM6362_MODE_FUN(adsl_spi_clk), BCM6362_MODE_FUN(adsl_spi_cs), BCM6362_MODE_FUN(ephy0_led), BCM6362_MODE_FUN(ephy1_led), BCM6362_MODE_FUN(ephy2_led), BCM6362_MODE_FUN(ephy3_led), BCM6362_MODE_FUN(ext_irq0), BCM6362_MODE_FUN(ext_irq1), BCM6362_MODE_FUN(ext_irq2), BCM6362_MODE_FUN(ext_irq3), BCM6362_CTRL_FUN(wifi), BCM6362_BASEMODE_FUN(nand, BASEMODE_NAND), }; static int bcm6362_pinctrl_get_group_count(struct pinctrl_dev *pctldev) { return ARRAY_SIZE(bcm6362_groups); } static const char *bcm6362_pinctrl_get_group_name(struct pinctrl_dev *pctldev, unsigned group) { return bcm6362_groups[group].name; } static int bcm6362_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, const unsigned **pins, unsigned *num_pins) { *pins = bcm6362_groups[group].pins; *num_pins = bcm6362_groups[group].num_pins; return 0; } static int bcm6362_pinctrl_get_func_count(struct pinctrl_dev *pctldev) { return ARRAY_SIZE(bcm6362_funcs); } static const char *bcm6362_pinctrl_get_func_name(struct pinctrl_dev *pctldev, unsigned selector) { return bcm6362_funcs[selector].name; } static int bcm6362_pinctrl_get_groups(struct pinctrl_dev *pctldev, unsigned selector, const char * const **groups, unsigned * const num_groups) { *groups = bcm6362_funcs[selector].groups; *num_groups = bcm6362_funcs[selector].num_groups; return 0; } static void bcm6362_set_gpio(struct bcm63xx_pinctrl *pc, unsigned pin) { const struct pinctrl_pin_desc *desc = &bcm6362_pins[pin]; unsigned int basemode = (uintptr_t)desc->drv_data; unsigned int mask = bcm63xx_bank_pin(pin); if (basemode) regmap_update_bits(pc->regs, BCM6362_BASEMODE_REG, basemode, 0); if (pin < BCM63XX_BANK_GPIOS) { /* base mode 0 => gpio 1 => mux function */ regmap_update_bits(pc->regs, BCM6362_MODE_REG, mask, 0); /* pins 0-23 might be muxed to led */ if (pin < BCM6362_NUM_LEDS) regmap_update_bits(pc->regs, BCM6362_LED_REG, mask, 0); } else { /* ctrl reg 0 => wifi function 1 => gpio */ regmap_update_bits(pc->regs, BCM6362_CTRL_REG, mask, mask); } } static int bcm6362_pinctrl_set_mux(struct pinctrl_dev *pctldev, unsigned selector, unsigned group) { struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); const struct bcm6362_pingroup *pg = &bcm6362_groups[group]; const struct bcm6362_function *f = &bcm6362_funcs[selector]; unsigned i; unsigned int reg; unsigned int val, mask; for (i = 0; i < pg->num_pins; i++) bcm6362_set_gpio(pc, pg->pins[i]); switch (f->reg) { case BCM6362_LEDCTRL: reg = BCM6362_LED_REG; mask = BIT(pg->pins[0]); val = BIT(pg->pins[0]); break; case BCM6362_MODE: reg = BCM6362_MODE_REG; mask = BIT(pg->pins[0]); val = BIT(pg->pins[0]); break; case BCM6362_CTRL: reg = BCM6362_CTRL_REG; mask = BIT(pg->pins[0]); val = 0; break; case BCM6362_BASEMODE: reg = BCM6362_BASEMODE_REG; mask = f->basemode_mask; val = f->basemode_mask; break; default: WARN_ON(1); return -EINVAL; } regmap_update_bits(pc->regs, reg, mask, val); return 0; } static int bcm6362_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 */ bcm6362_set_gpio(pc, offset); return 0; } static struct pinctrl_ops bcm6362_pctl_ops = { .dt_free_map = pinctrl_utils_free_map, .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, .get_group_name = bcm6362_pinctrl_get_group_name, .get_group_pins = bcm6362_pinctrl_get_group_pins, .get_groups_count = bcm6362_pinctrl_get_group_count, }; static struct pinmux_ops bcm6362_pmx_ops = { .get_function_groups = bcm6362_pinctrl_get_groups, .get_function_name = bcm6362_pinctrl_get_func_name, .get_functions_count = bcm6362_pinctrl_get_func_count, .gpio_request_enable = bcm6362_gpio_request_enable, .set_mux = bcm6362_pinctrl_set_mux, .strict = true, }; static const struct bcm63xx_pinctrl_soc bcm6362_soc = { .ngpios = BCM6362_NUM_GPIOS, .npins = ARRAY_SIZE(bcm6362_pins), .pctl_ops = &bcm6362_pctl_ops, .pins = bcm6362_pins, .pmx_ops = &bcm6362_pmx_ops, }; static int bcm6362_pinctrl_probe(struct platform_device *pdev) { return bcm63xx_pinctrl_probe(pdev, &bcm6362_soc, NULL); } static const struct of_device_id bcm6362_pinctrl_match[] = { { .compatible = "brcm,bcm6362-pinctrl", }, { /* sentinel */ } }; static struct platform_driver bcm6362_pinctrl_driver = { .probe = bcm6362_pinctrl_probe, .driver = { .name = "bcm6362-pinctrl", .of_match_table = bcm6362_pinctrl_match, }, }; builtin_platform_driver(bcm6362_pinctrl_driver);