diff options
Diffstat (limited to 'drivers/pinctrl/pinctrl-oxnas.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-oxnas.c | 835 |
1 files changed, 835 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-oxnas.c b/drivers/pinctrl/pinctrl-oxnas.c new file mode 100644 index 000000000000..5fd113c06864 --- /dev/null +++ b/drivers/pinctrl/pinctrl-oxnas.c @@ -0,0 +1,835 @@ +/* + * Oxford Semiconductor OXNAS SoC Family pinctrl driver + * + * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com> + * + * Based on pinctrl-pic32.c + * Joshua Henderson, <joshua.henderson@microchip.com> + * Copyright (C) 2015 Microchip Technology Inc. All rights reserved. + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ +#include <linux/gpio/driver.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> + +#include "pinctrl-utils.h" + +#define PINS_PER_BANK 32 + +#define GPIO_BANK_START(bank) ((bank) * PINS_PER_BANK) + +/* Regmap Offsets */ +#define PINMUX_PRIMARY_SEL0 0x0c +#define PINMUX_SECONDARY_SEL0 0x14 +#define PINMUX_TERTIARY_SEL0 0x8c +#define PINMUX_PRIMARY_SEL1 0x10 +#define PINMUX_SECONDARY_SEL1 0x18 +#define PINMUX_TERTIARY_SEL1 0x90 +#define PINMUX_PULLUP_CTRL0 0xac +#define PINMUX_PULLUP_CTRL1 0xb0 + +/* GPIO Registers */ +#define INPUT_VALUE 0x00 +#define IRQ_PENDING 0x0c +#define OUTPUT_SET 0x14 +#define OUTPUT_CLEAR 0x18 +#define OUTPUT_EN_SET 0x1c +#define OUTPUT_EN_CLEAR 0x20 +#define RE_IRQ_ENABLE 0x28 +#define FE_IRQ_ENABLE 0x2c + +struct oxnas_function { + const char *name; + const char * const *groups; + unsigned int ngroups; +}; + +struct oxnas_pin_group { + const char *name; + unsigned int pin; + unsigned int bank; + struct oxnas_desc_function *functions; +}; + +struct oxnas_desc_function { + const char *name; + unsigned int fct; +}; + +struct oxnas_gpio_bank { + void __iomem *reg_base; + struct gpio_chip gpio_chip; + struct irq_chip irq_chip; + unsigned int id; +}; + +struct oxnas_pinctrl { + struct regmap *regmap; + struct device *dev; + struct pinctrl_dev *pctldev; + const struct pinctrl_pin_desc *pins; + unsigned int npins; + const struct oxnas_function *functions; + unsigned int nfunctions; + const struct oxnas_pin_group *groups; + unsigned int ngroups; + struct oxnas_gpio_bank *gpio_banks; + unsigned int nbanks; +}; + +static const struct pinctrl_pin_desc oxnas_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"), + PINCTRL_PIN(32, "gpio32"), + PINCTRL_PIN(33, "gpio33"), + PINCTRL_PIN(34, "gpio34"), +}; + +static const char * const oxnas_fct0_group[] = { + "gpio0", "gpio1", "gpio2", "gpio3", + "gpio4", "gpio5", "gpio6", "gpio7", + "gpio8", "gpio9", "gpio10", "gpio11", + "gpio12", "gpio13", "gpio14", "gpio15", + "gpio16", "gpio17", "gpio18", "gpio19", + "gpio20", "gpio21", "gpio22", "gpio23", + "gpio24", "gpio25", "gpio26", "gpio27", + "gpio28", "gpio29", "gpio30", "gpio31", + "gpio32", "gpio33", "gpio34" +}; + +static const char * const oxnas_fct3_group[] = { + "gpio0", "gpio1", "gpio2", "gpio3", + "gpio4", "gpio5", "gpio6", "gpio7", + "gpio8", "gpio9", + "gpio20", + "gpio22", "gpio23", "gpio24", "gpio25", + "gpio26", "gpio27", "gpio28", "gpio29", + "gpio30", "gpio31", "gpio32", "gpio33", + "gpio34" +}; + +#define FUNCTION(_name, _gr) \ + { \ + .name = #_name, \ + .groups = oxnas_##_gr##_group, \ + .ngroups = ARRAY_SIZE(oxnas_##_gr##_group), \ + } + +static const struct oxnas_function oxnas_functions[] = { + FUNCTION(gpio, fct0), + FUNCTION(fct3, fct3), +}; + +#define OXNAS_PINCTRL_GROUP(_pin, _name, ...) \ + { \ + .name = #_name, \ + .pin = _pin, \ + .bank = _pin / PINS_PER_BANK, \ + .functions = (struct oxnas_desc_function[]){ \ + __VA_ARGS__, { } }, \ + } + +#define OXNAS_PINCTRL_FUNCTION(_name, _fct) \ + { \ + .name = #_name, \ + .fct = _fct, \ + } + +static const struct oxnas_pin_group oxnas_groups[] = { + OXNAS_PINCTRL_GROUP(0, gpio0, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(1, gpio1, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(2, gpio2, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(3, gpio3, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(4, gpio4, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(5, gpio5, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(6, gpio6, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(7, gpio7, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(8, gpio8, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(9, gpio9, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(10, gpio10, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(11, gpio11, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(12, gpio12, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(13, gpio13, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(14, gpio14, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(15, gpio15, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(16, gpio16, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(17, gpio17, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(18, gpio18, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(19, gpio19, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(20, gpio20, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(21, gpio21, + OXNAS_PINCTRL_FUNCTION(gpio, 0)), + OXNAS_PINCTRL_GROUP(22, gpio22, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(23, gpio23, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(24, gpio24, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(25, gpio25, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(26, gpio26, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(27, gpio27, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(28, gpio28, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(29, gpio29, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(30, gpio30, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(31, gpio31, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(32, gpio32, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(33, gpio33, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), + OXNAS_PINCTRL_GROUP(34, gpio34, + OXNAS_PINCTRL_FUNCTION(gpio, 0), + OXNAS_PINCTRL_FUNCTION(fct3, 3)), +}; + +static inline struct oxnas_gpio_bank *pctl_to_bank(struct oxnas_pinctrl *pctl, + unsigned int pin) +{ + return &pctl->gpio_banks[pin / PINS_PER_BANK]; +} + +static int oxnas_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->ngroups; +} + +static const char *oxnas_pinctrl_get_group_name(struct pinctrl_dev *pctldev, + unsigned int group) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->groups[group].name; +} + +static int oxnas_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int group, + const unsigned int **pins, + unsigned int *num_pins) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + *pins = &pctl->groups[group].pin; + *num_pins = 1; + + return 0; +} + +static const struct pinctrl_ops oxnas_pinctrl_ops = { + .get_groups_count = oxnas_pinctrl_get_groups_count, + .get_group_name = oxnas_pinctrl_get_group_name, + .get_group_pins = oxnas_pinctrl_get_group_pins, + .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, + .dt_free_map = pinctrl_utils_dt_free_map, +}; + +static int oxnas_pinmux_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->nfunctions; +} + +static const char * +oxnas_pinmux_get_function_name(struct pinctrl_dev *pctldev, unsigned int func) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->functions[func].name; +} + +static int oxnas_pinmux_get_function_groups(struct pinctrl_dev *pctldev, + unsigned int func, + const char * const **groups, + unsigned int * const num_groups) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + *groups = pctl->functions[func].groups; + *num_groups = pctl->functions[func].ngroups; + + return 0; +} + +static int oxnas_pinmux_enable(struct pinctrl_dev *pctldev, + unsigned int func, unsigned int group) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + const struct oxnas_pin_group *pg = &pctl->groups[group]; + const struct oxnas_function *pf = &pctl->functions[func]; + const char *fname = pf->name; + struct oxnas_desc_function *functions = pg->functions; + u32 mask = BIT(pg->pin); + + while (functions->name) { + if (!strcmp(functions->name, fname)) { + dev_dbg(pctl->dev, + "setting function %s bank %d pin %d fct %d mask %x\n", + fname, pg->bank, pg->pin, + functions->fct, mask); + + regmap_write_bits(pctl->regmap, + (pg->bank ? + PINMUX_PRIMARY_SEL1 : + PINMUX_PRIMARY_SEL0), + mask, + (functions->fct == 1 ? + mask : 0)); + regmap_write_bits(pctl->regmap, + (pg->bank ? + PINMUX_SECONDARY_SEL1 : + PINMUX_SECONDARY_SEL0), + mask, + (functions->fct == 2 ? + mask : 0)); + regmap_write_bits(pctl->regmap, + (pg->bank ? + PINMUX_TERTIARY_SEL1 : + PINMUX_TERTIARY_SEL0), + mask, + (functions->fct == 3 ? + mask : 0)); + + return 0; + } + + functions++; + } + + dev_err(pctl->dev, "cannot mux pin %u to function %u\n", group, func); + + return -EINVAL; +} + +static int oxnas_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct oxnas_gpio_bank *bank = gpiochip_get_data(range->gc); + u32 mask = BIT(offset - bank->gpio_chip.base); + + dev_dbg(pctl->dev, "requesting gpio %d in bank %d (id %d) with mask 0x%x\n", + offset, bank->gpio_chip.base, bank->id, mask); + + regmap_write_bits(pctl->regmap, + (bank->id ? + PINMUX_PRIMARY_SEL1 : + PINMUX_PRIMARY_SEL0), + mask, 0); + regmap_write_bits(pctl->regmap, + (bank->id ? + PINMUX_SECONDARY_SEL1 : + PINMUX_SECONDARY_SEL0), + mask, 0); + regmap_write_bits(pctl->regmap, + (bank->id ? + PINMUX_TERTIARY_SEL1 : + PINMUX_TERTIARY_SEL0), + mask, 0); + + return 0; +} + +static int oxnas_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + u32 mask = BIT(offset); + + writel_relaxed(mask, bank->reg_base + OUTPUT_EN_CLEAR); + + return 0; +} + +static int oxnas_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + u32 mask = BIT(offset); + + return (readl_relaxed(bank->reg_base + INPUT_VALUE) & mask) != 0; +} + +static void oxnas_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + u32 mask = BIT(offset); + + if (value) + writel_relaxed(mask, bank->reg_base + OUTPUT_SET); + else + writel_relaxed(mask, bank->reg_base + OUTPUT_CLEAR); +} + +static int oxnas_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + u32 mask = BIT(offset); + + oxnas_gpio_set(chip, offset, value); + writel_relaxed(mask, bank->reg_base + OUTPUT_EN_SET); + + return 0; +} + +static int oxnas_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset, bool input) +{ + struct gpio_chip *chip = range->gc; + + if (input) + oxnas_gpio_direction_input(chip, offset); + else + oxnas_gpio_direction_output(chip, offset, 0); + + return 0; +} + +static const struct pinmux_ops oxnas_pinmux_ops = { + .get_functions_count = oxnas_pinmux_get_functions_count, + .get_function_name = oxnas_pinmux_get_function_name, + .get_function_groups = oxnas_pinmux_get_function_groups, + .set_mux = oxnas_pinmux_enable, + .gpio_request_enable = oxnas_gpio_request_enable, + .gpio_set_direction = oxnas_gpio_set_direction, +}; + +static int oxnas_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *config) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct oxnas_gpio_bank *bank = pctl_to_bank(pctl, pin); + unsigned int param = pinconf_to_config_param(*config); + u32 mask = BIT(pin - bank->gpio_chip.base); + int ret; + u32 arg; + + switch (param) { + case PIN_CONFIG_BIAS_PULL_UP: + ret = regmap_read(pctl->regmap, + (bank->id ? + PINMUX_PULLUP_CTRL1 : + PINMUX_PULLUP_CTRL0), + &arg); + if (ret) + return ret; + + arg = !!(arg & mask); + break; + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + + return 0; +} + +static int oxnas_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int num_configs) +{ + struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct oxnas_gpio_bank *bank = pctl_to_bank(pctl, pin); + unsigned int param; + u32 arg; + unsigned int i; + u32 offset = pin - bank->gpio_chip.base; + u32 mask = BIT(offset); + + dev_dbg(pctl->dev, "setting pin %d bank %d mask 0x%x\n", + pin, bank->gpio_chip.base, mask); + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + arg = pinconf_to_config_argument(configs[i]); + + switch (param) { + case PIN_CONFIG_BIAS_PULL_UP: + dev_dbg(pctl->dev, " pullup\n"); + regmap_write_bits(pctl->regmap, + (bank->id ? + PINMUX_PULLUP_CTRL1 : + PINMUX_PULLUP_CTRL0), + mask, mask); + break; + default: + dev_err(pctl->dev, "Property %u not supported\n", + param); + return -ENOTSUPP; + } + } + + return 0; +} + +static const struct pinconf_ops oxnas_pinconf_ops = { + .pin_config_get = oxnas_pinconf_get, + .pin_config_set = oxnas_pinconf_set, + .is_generic = true, +}; + +static struct pinctrl_desc oxnas_pinctrl_desc = { + .name = "oxnas-pinctrl", + .pctlops = &oxnas_pinctrl_ops, + .pmxops = &oxnas_pinmux_ops, + .confops = &oxnas_pinconf_ops, + .owner = THIS_MODULE, +}; + +static void oxnas_gpio_irq_ack(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + u32 mask = BIT(data->hwirq); + + writel(mask, bank->reg_base + IRQ_PENDING); +} + +static void oxnas_gpio_irq_mask(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + unsigned int type = irqd_get_trigger_type(data); + u32 mask = BIT(data->hwirq); + + if (type & IRQ_TYPE_EDGE_RISING) + writel(readl(bank->reg_base + RE_IRQ_ENABLE) & ~mask, + bank->reg_base + RE_IRQ_ENABLE); + + if (type & IRQ_TYPE_EDGE_FALLING) + writel(readl(bank->reg_base + FE_IRQ_ENABLE) & ~mask, + bank->reg_base + FE_IRQ_ENABLE); +} + +static void oxnas_gpio_irq_unmask(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + unsigned int type = irqd_get_trigger_type(data); + u32 mask = BIT(data->hwirq); + + if (type & IRQ_TYPE_EDGE_RISING) + writel(readl(bank->reg_base + RE_IRQ_ENABLE) | mask, + bank->reg_base + RE_IRQ_ENABLE); + + if (type & IRQ_TYPE_EDGE_FALLING) + writel(readl(bank->reg_base + FE_IRQ_ENABLE) | mask, + bank->reg_base + FE_IRQ_ENABLE); +} + +static unsigned int oxnas_gpio_irq_startup(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + + oxnas_gpio_direction_input(chip, data->hwirq); + oxnas_gpio_irq_unmask(data); + + return 0; +} + +static int oxnas_gpio_irq_set_type(struct irq_data *data, unsigned int type) +{ + if ((type & (IRQ_TYPE_EDGE_RISING|IRQ_TYPE_EDGE_FALLING)) == 0) + return -EINVAL; + + irq_set_handler_locked(data, handle_edge_irq); + + return 0; +} + +static void oxnas_gpio_irq_handler(struct irq_desc *desc) +{ + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + struct oxnas_gpio_bank *bank = gpiochip_get_data(gc); + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned long stat; + unsigned int pin; + + chained_irq_enter(chip, desc); + + stat = readl(bank->reg_base + IRQ_PENDING); + + for_each_set_bit(pin, &stat, BITS_PER_LONG) + generic_handle_irq(irq_linear_revmap(gc->irqdomain, pin)); + + chained_irq_exit(chip, desc); +} + +#define GPIO_BANK(_bank) \ + { \ + .gpio_chip = { \ + .label = "GPIO" #_bank, \ + .request = gpiochip_generic_request, \ + .free = gpiochip_generic_free, \ + .direction_input = oxnas_gpio_direction_input, \ + .direction_output = oxnas_gpio_direction_output, \ + .get = oxnas_gpio_get, \ + .set = oxnas_gpio_set, \ + .ngpio = PINS_PER_BANK, \ + .base = GPIO_BANK_START(_bank), \ + .owner = THIS_MODULE, \ + .can_sleep = 0, \ + }, \ + .irq_chip = { \ + .name = "GPIO" #_bank, \ + .irq_startup = oxnas_gpio_irq_startup, \ + .irq_ack = oxnas_gpio_irq_ack, \ + .irq_mask = oxnas_gpio_irq_mask, \ + .irq_unmask = oxnas_gpio_irq_unmask, \ + .irq_set_type = oxnas_gpio_irq_set_type, \ + }, \ + } + +static struct oxnas_gpio_bank oxnas_gpio_banks[] = { + GPIO_BANK(0), + GPIO_BANK(1), +}; + +static int oxnas_pinctrl_probe(struct platform_device *pdev) +{ + struct oxnas_pinctrl *pctl; + + pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); + if (!pctl) + return -ENOMEM; + pctl->dev = &pdev->dev; + dev_set_drvdata(&pdev->dev, pctl); + + pctl->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "oxsemi,sys-ctrl"); + if (IS_ERR(pctl->regmap)) { + dev_err(&pdev->dev, "failed to get sys ctrl regmap\n"); + return -ENODEV; + } + + pctl->pins = oxnas_pins; + pctl->npins = ARRAY_SIZE(oxnas_pins); + pctl->functions = oxnas_functions; + pctl->nfunctions = ARRAY_SIZE(oxnas_functions); + pctl->groups = oxnas_groups; + pctl->ngroups = ARRAY_SIZE(oxnas_groups); + pctl->gpio_banks = oxnas_gpio_banks; + pctl->nbanks = ARRAY_SIZE(oxnas_gpio_banks); + + oxnas_pinctrl_desc.pins = pctl->pins; + oxnas_pinctrl_desc.npins = pctl->npins; + + pctl->pctldev = pinctrl_register(&oxnas_pinctrl_desc, + &pdev->dev, pctl); + if (IS_ERR(pctl->pctldev)) { + dev_err(&pdev->dev, "Failed to register pinctrl device\n"); + return PTR_ERR(pctl->pctldev); + } + + return 0; +} + +static int oxnas_gpio_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct of_phandle_args pinspec; + struct oxnas_gpio_bank *bank; + unsigned int id, ngpios; + int irq, ret; + struct resource *res; + + if (of_parse_phandle_with_fixed_args(np, "gpio-ranges", + 3, 0, &pinspec)) { + dev_err(&pdev->dev, "gpio-ranges property not found\n"); + return -EINVAL; + } + + id = pinspec.args[1] / PINS_PER_BANK; + ngpios = pinspec.args[2]; + + if (id >= ARRAY_SIZE(oxnas_gpio_banks)) { + dev_err(&pdev->dev, "invalid gpio-ranges base arg\n"); + return -EINVAL; + } + + if (ngpios > PINS_PER_BANK) { + dev_err(&pdev->dev, "invalid gpio-ranges count arg\n"); + return -EINVAL; + } + + bank = &oxnas_gpio_banks[id]; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + bank->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(bank->reg_base)) + return PTR_ERR(bank->reg_base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "irq get failed\n"); + return irq; + } + + bank->id = id; + bank->gpio_chip.parent = &pdev->dev; + bank->gpio_chip.of_node = np; + bank->gpio_chip.ngpio = ngpios; + ret = gpiochip_add_data(&bank->gpio_chip, bank); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to add GPIO chip %u: %d\n", + id, ret); + return ret; + } + + ret = gpiochip_irqchip_add(&bank->gpio_chip, &bank->irq_chip, + 0, handle_level_irq, IRQ_TYPE_NONE); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to add IRQ chip %u: %d\n", + id, ret); + gpiochip_remove(&bank->gpio_chip); + return ret; + } + + gpiochip_set_chained_irqchip(&bank->gpio_chip, &bank->irq_chip, + irq, oxnas_gpio_irq_handler); + + return 0; +} + +static const struct of_device_id oxnas_pinctrl_of_match[] = { + { .compatible = "oxsemi,ox810se-pinctrl", }, + { }, +}; + +static struct platform_driver oxnas_pinctrl_driver = { + .driver = { + .name = "oxnas-pinctrl", + .of_match_table = oxnas_pinctrl_of_match, + .suppress_bind_attrs = true, + }, + .probe = oxnas_pinctrl_probe, +}; + +static const struct of_device_id oxnas_gpio_of_match[] = { + { .compatible = "oxsemi,ox810se-gpio", }, + { }, +}; + +static struct platform_driver oxnas_gpio_driver = { + .driver = { + .name = "oxnas-gpio", + .of_match_table = oxnas_gpio_of_match, + .suppress_bind_attrs = true, + }, + .probe = oxnas_gpio_probe, +}; + +static int __init oxnas_gpio_register(void) +{ + return platform_driver_register(&oxnas_gpio_driver); +} +arch_initcall(oxnas_gpio_register); + +static int __init oxnas_pinctrl_register(void) +{ + return platform_driver_register(&oxnas_pinctrl_driver); +} +arch_initcall(oxnas_pinctrl_register); |