| /* |
| * Copyright (c) 2016 Linaro Limited. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT arm_cmsdk_gpio |
| |
| #include <zephyr/kernel.h> |
| |
| #include <zephyr/device.h> |
| #include <errno.h> |
| #include <zephyr/drivers/gpio.h> |
| #include <zephyr/init.h> |
| #include <soc.h> |
| #include <zephyr/drivers/clock_control/arm_clock_control.h> |
| |
| #include "gpio_cmsdk_ahb.h" |
| #include "gpio_utils.h" |
| |
| /** |
| * @brief GPIO driver for ARM CMSDK AHB GPIO |
| */ |
| |
| typedef void (*gpio_config_func_t)(const struct device *port); |
| |
| struct gpio_cmsdk_ahb_cfg { |
| /* gpio_driver_config needs to be first */ |
| struct gpio_driver_config common; |
| volatile struct gpio_cmsdk_ahb *port; |
| gpio_config_func_t gpio_config_func; |
| /* GPIO Clock control in Active State */ |
| struct arm_clock_control_t gpio_cc_as; |
| /* GPIO Clock control in Sleep State */ |
| struct arm_clock_control_t gpio_cc_ss; |
| /* GPIO Clock control in Deep Sleep State */ |
| struct arm_clock_control_t gpio_cc_dss; |
| }; |
| |
| struct gpio_cmsdk_ahb_dev_data { |
| /* gpio_driver_data needs to be first */ |
| struct gpio_driver_data common; |
| /* list of callbacks */ |
| sys_slist_t gpio_cb; |
| }; |
| |
| static int gpio_cmsdk_ahb_port_get_raw(const struct device *dev, |
| uint32_t *value) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| *value = cfg->port->data; |
| |
| return 0; |
| } |
| |
| static int gpio_cmsdk_ahb_port_set_masked_raw(const struct device *dev, |
| uint32_t mask, |
| uint32_t value) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| cfg->port->dataout = (cfg->port->dataout & ~mask) | (mask & value); |
| |
| return 0; |
| } |
| |
| static int gpio_cmsdk_ahb_port_set_bits_raw(const struct device *dev, |
| uint32_t mask) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| cfg->port->dataout |= mask; |
| |
| return 0; |
| } |
| |
| static int gpio_cmsdk_ahb_port_clear_bits_raw(const struct device *dev, |
| uint32_t mask) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| cfg->port->dataout &= ~mask; |
| |
| return 0; |
| } |
| |
| static int gpio_cmsdk_ahb_port_toggle_bits(const struct device *dev, |
| uint32_t mask) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| cfg->port->dataout ^= mask; |
| |
| return 0; |
| } |
| |
| static int cmsdk_ahb_gpio_config(const struct device *dev, uint32_t mask, |
| gpio_flags_t flags) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| if (((flags & GPIO_INPUT) == 0) && ((flags & GPIO_OUTPUT) == 0)) { |
| return -ENOTSUP; |
| } |
| |
| if ((flags & (GPIO_PULL_UP | GPIO_PULL_DOWN)) != 0) { |
| return -ENOTSUP; |
| } |
| |
| if ((flags & GPIO_SINGLE_ENDED) != 0) { |
| return -ENOTSUP; |
| } |
| |
| /* |
| * Setup the pin direction |
| * Output Enable: |
| * 0 - Input |
| * 1 - Output |
| */ |
| if ((flags & GPIO_OUTPUT) != 0) { |
| if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) { |
| gpio_cmsdk_ahb_port_set_bits_raw(dev, mask); |
| } else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) { |
| gpio_cmsdk_ahb_port_clear_bits_raw(dev, mask); |
| } |
| cfg->port->outenableset = mask; |
| } else { |
| cfg->port->outenableclr = mask; |
| } |
| |
| cfg->port->altfuncclr = mask; |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Configure pin or port |
| * |
| * @param dev Device struct |
| * @param pin The pin number |
| * @param flags Flags of pin or port |
| * |
| * @return 0 if successful, failed otherwise |
| */ |
| static int gpio_cmsdk_ahb_config(const struct device *dev, |
| gpio_pin_t pin, |
| gpio_flags_t flags) |
| { |
| return cmsdk_ahb_gpio_config(dev, BIT(pin), flags); |
| } |
| |
| static int gpio_cmsdk_ahb_pin_interrupt_configure(const struct device *dev, |
| gpio_pin_t pin, |
| enum gpio_int_mode mode, |
| enum gpio_int_trig trig) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| if (trig == GPIO_INT_TRIG_BOTH) { |
| return -ENOTSUP; |
| } |
| |
| /* For now treat level interrupts as not supported, as we seem to only |
| * get a single 'edge' still interrupt rather than continuous |
| * interrupts until the cause is cleared */ |
| if (mode == GPIO_INT_MODE_LEVEL) { |
| return -ENOTSUP; |
| } |
| |
| if (mode == GPIO_INT_MODE_DISABLED) { |
| cfg->port->intenclr = BIT(pin); |
| } else { |
| if (mode == GPIO_INT_MODE_EDGE) { |
| cfg->port->inttypeset = BIT(pin); |
| } else { |
| /* LEVEL */ |
| cfg->port->inttypeclr = BIT(pin); |
| } |
| |
| /* Level High or Edge Rising */ |
| if (trig == GPIO_INT_TRIG_HIGH) { |
| cfg->port->intpolset = BIT(pin); |
| } else { |
| cfg->port->intpolclr = BIT(pin); |
| } |
| cfg->port->intclear = BIT(pin); |
| cfg->port->intenset = BIT(pin); |
| } |
| |
| return 0; |
| } |
| |
| static void gpio_cmsdk_ahb_isr(const struct device *dev) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| struct gpio_cmsdk_ahb_dev_data *data = dev->data; |
| uint32_t int_stat; |
| |
| int_stat = cfg->port->intstatus; |
| |
| /* clear the port interrupts */ |
| cfg->port->intclear = int_stat; |
| |
| gpio_fire_callbacks(&data->gpio_cb, dev, int_stat); |
| |
| } |
| |
| static int gpio_cmsdk_ahb_manage_callback(const struct device *dev, |
| struct gpio_callback *callback, |
| bool set) |
| { |
| struct gpio_cmsdk_ahb_dev_data *data = dev->data; |
| |
| return gpio_manage_callback(&data->gpio_cb, callback, set); |
| } |
| |
| static const struct gpio_driver_api gpio_cmsdk_ahb_drv_api_funcs = { |
| .pin_configure = gpio_cmsdk_ahb_config, |
| .port_get_raw = gpio_cmsdk_ahb_port_get_raw, |
| .port_set_masked_raw = gpio_cmsdk_ahb_port_set_masked_raw, |
| .port_set_bits_raw = gpio_cmsdk_ahb_port_set_bits_raw, |
| .port_clear_bits_raw = gpio_cmsdk_ahb_port_clear_bits_raw, |
| .port_toggle_bits = gpio_cmsdk_ahb_port_toggle_bits, |
| .pin_interrupt_configure = gpio_cmsdk_ahb_pin_interrupt_configure, |
| .manage_callback = gpio_cmsdk_ahb_manage_callback, |
| }; |
| |
| /** |
| * @brief Initialization function of GPIO |
| * |
| * @param dev Device struct |
| * @return 0 if successful, failed otherwise. |
| */ |
| static int gpio_cmsdk_ahb_init(const struct device *dev) |
| { |
| const struct gpio_cmsdk_ahb_cfg * const cfg = dev->config; |
| |
| #ifdef CONFIG_CLOCK_CONTROL |
| /* Enable clock for subsystem */ |
| const struct device *clk = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(0)); |
| |
| if (!device_is_ready(clk)) { |
| return -ENODEV; |
| } |
| |
| #ifdef CONFIG_SOC_SERIES_BEETLE |
| clock_control_on(clk, (clock_control_subsys_t *) &cfg->gpio_cc_as); |
| clock_control_off(clk, (clock_control_subsys_t *) &cfg->gpio_cc_ss); |
| clock_control_off(clk, (clock_control_subsys_t *) &cfg->gpio_cc_dss); |
| #endif /* CONFIG_SOC_SERIES_BEETLE */ |
| #endif /* CONFIG_CLOCK_CONTROL */ |
| |
| cfg->gpio_config_func(dev); |
| |
| return 0; |
| } |
| |
| #define CMSDK_AHB_GPIO_DEVICE(n) \ |
| static void gpio_cmsdk_port_##n##_config_func(const struct device *dev); \ |
| \ |
| static const struct gpio_cmsdk_ahb_cfg gpio_cmsdk_port_##n##_config = { \ |
| .common = { \ |
| .port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n), \ |
| }, \ |
| .port = ((volatile struct gpio_cmsdk_ahb *)DT_INST_REG_ADDR(n)),\ |
| .gpio_config_func = gpio_cmsdk_port_##n##_config_func, \ |
| .gpio_cc_as = {.bus = CMSDK_AHB, .state = SOC_ACTIVE, \ |
| .device = DT_INST_REG_ADDR(n),}, \ |
| .gpio_cc_ss = {.bus = CMSDK_AHB, .state = SOC_SLEEP, \ |
| .device = DT_INST_REG_ADDR(n),}, \ |
| .gpio_cc_dss = {.bus = CMSDK_AHB, .state = SOC_DEEPSLEEP, \ |
| .device = DT_INST_REG_ADDR(n),}, \ |
| }; \ |
| \ |
| static struct gpio_cmsdk_ahb_dev_data gpio_cmsdk_port_##n##_data; \ |
| \ |
| DEVICE_DT_INST_DEFINE(n, \ |
| gpio_cmsdk_ahb_init, \ |
| NULL, \ |
| &gpio_cmsdk_port_##n##_data, \ |
| &gpio_cmsdk_port_## n ##_config, \ |
| PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY, \ |
| &gpio_cmsdk_ahb_drv_api_funcs); \ |
| \ |
| static void gpio_cmsdk_port_##n##_config_func(const struct device *dev) \ |
| { \ |
| IRQ_CONNECT(DT_INST_IRQN(n), \ |
| DT_INST_IRQ(n, priority), \ |
| gpio_cmsdk_ahb_isr, \ |
| DEVICE_DT_INST_GET(n), 0); \ |
| \ |
| irq_enable(DT_INST_IRQN(n)); \ |
| } |
| |
| DT_INST_FOREACH_STATUS_OKAY(CMSDK_AHB_GPIO_DEVICE) |