diff options
Diffstat (limited to 'drivers/pinctrl/bcm/pinctrl-bcm6362.c')
| -rw-r--r-- | drivers/pinctrl/bcm/pinctrl-bcm6362.c | 617 |
1 files changed, 617 insertions, 0 deletions
diff --git a/drivers/pinctrl/bcm/pinctrl-bcm6362.c b/drivers/pinctrl/bcm/pinctrl-bcm6362.c new file mode 100644 index 000000000000..eb7ec80353e9 --- /dev/null +++ b/drivers/pinctrl/bcm/pinctrl-bcm6362.c @@ -0,0 +1,617 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for BCM6362 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 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 mask = bcm63xx_bank_pin(pin); + + if (desc->drv_data) + regmap_update_bits(pc->regs, BCM6362_BASEMODE_REG, + (uint32_t) desc->drv_data, 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); 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