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225 lines
7.6 KiB
225 lines
7.6 KiB
/* |
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* Copyright 2020 Broadcom |
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* Copyright 2024 Meta |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#define DT_DRV_COMPAT brcm_iproc_gpio |
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#include <zephyr/arch/common/sys_bitops.h> |
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#include <zephyr/device.h> |
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#include <zephyr/drivers/gpio.h> |
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#include <zephyr/drivers/gpio/gpio_utils.h> |
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#include <zephyr/irq.h> |
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#include <zephyr/kernel.h> |
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#define IPROC_GPIO_DATA_IN_OFFSET 0x00 |
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#define IPROC_GPIO_DATA_OUT_OFFSET 0x04 |
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#define IPROC_GPIO_OUT_EN_OFFSET 0x08 |
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#define IPROC_GPIO_INT_TYPE_OFFSET 0x0c |
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#define IPROC_GPIO_INT_DE_OFFSET 0x10 |
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#define IPROC_GPIO_INT_EDGE_OFFSET 0x14 |
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#define IPROC_GPIO_INT_MSK_OFFSET 0x18 |
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#define IPROC_GPIO_INT_STAT_OFFSET 0x1c |
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#define IPROC_GPIO_INT_MSTAT_OFFSET 0x20 |
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#define IPROC_GPIO_INT_CLR_OFFSET 0x24 |
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#define IPROC_GPIO_PAD_RES_OFFSET 0x34 |
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#define IPROC_GPIO_RES_EN_OFFSET 0x38 |
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struct gpio_iproc_config { |
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/* gpio_driver_config needs to be first */ |
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struct gpio_driver_config common; |
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mem_addr_t base; |
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void (*irq_config_func)(const struct device *dev); |
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}; |
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struct gpio_iproc_data { |
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/* gpio_driver_data needs to be first */ |
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struct gpio_driver_data common; |
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sys_slist_t cb; |
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}; |
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#define DEV_CFG(dev) ((const struct gpio_iproc_config *const)(dev)->config) |
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#define DEV_DATA(dev) ((struct gpio_iproc_data *const)(dev)->data) |
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static int gpio_iproc_configure(const struct device *dev, gpio_pin_t pin, gpio_flags_t flags) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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/* Setup the pin direcion. */ |
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if (flags & GPIO_OUTPUT) { |
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/* configure pin for output */ |
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sys_set_bit(base + IPROC_GPIO_OUT_EN_OFFSET, pin); |
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} else if (flags & GPIO_INPUT) { |
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/* configure pin for input */ |
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sys_clear_bit(base + IPROC_GPIO_OUT_EN_OFFSET, pin); |
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} |
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return 0; |
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} |
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static int gpio_iproc_port_get_raw(const struct device *dev, uint32_t *value) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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*value = sys_read32(base + IPROC_GPIO_DATA_IN_OFFSET); |
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return 0; |
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} |
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static int gpio_iproc_port_set_masked_raw(const struct device *dev, uint32_t mask, uint32_t value) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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value = sys_read32(base + IPROC_GPIO_DATA_OUT_OFFSET); |
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value = (value & (~mask)) | (value & mask); |
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sys_write32(value, base + IPROC_GPIO_DATA_OUT_OFFSET); |
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return 0; |
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} |
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static int gpio_iproc_port_set_bits_raw(const struct device *dev, uint32_t mask) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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sys_write32(mask, base + IPROC_GPIO_DATA_OUT_OFFSET); |
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return 0; |
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} |
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static int gpio_iproc_port_clear_bits_raw(const struct device *dev, uint32_t mask) |
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{ |
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uint32_t value; |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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/* Clear pins. */ |
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value = sys_read32(base + IPROC_GPIO_DATA_OUT_OFFSET); |
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value = (value & ~mask); |
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sys_write32(value, base + IPROC_GPIO_DATA_OUT_OFFSET); |
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return 0; |
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} |
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static int gpio_iproc_port_toggle_bits(const struct device *dev, uint32_t mask) |
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{ |
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uint32_t value; |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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/* toggles pins. */ |
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value = sys_read32(base + IPROC_GPIO_DATA_OUT_OFFSET); |
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value = (value ^ mask); |
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sys_write32(value, base + IPROC_GPIO_DATA_OUT_OFFSET); |
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return 0; |
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} |
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static int gpio_iproc_pin_interrupt_configure(const struct device *dev, gpio_pin_t pin, |
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enum gpio_int_mode mode, enum gpio_int_trig trig) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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/* check for interrupt configurations */ |
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if (mode & GPIO_INT_ENABLE) { |
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if (mode & GPIO_INT_EDGE) { |
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sys_clear_bit(base + IPROC_GPIO_INT_TYPE_OFFSET, pin); |
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} else { |
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sys_set_bit(base + IPROC_GPIO_INT_TYPE_OFFSET, pin); |
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} |
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/* Generate interrupt of both falling/rising edge */ |
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if (trig & GPIO_INT_EDGE_BOTH) { |
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sys_set_bit(base + IPROC_GPIO_INT_DE_OFFSET, pin); |
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} else if (trig & GPIO_INT_HIGH_1) { |
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/* Generate interrupt on rising edge */ |
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sys_clear_bit(base + IPROC_GPIO_INT_DE_OFFSET, pin); |
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sys_set_bit(base + IPROC_GPIO_INT_EDGE_OFFSET, pin); |
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} else if (trig & GPIO_INT_LOW_0) { |
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/* Generate interrupt on falling edge */ |
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sys_clear_bit(base + IPROC_GPIO_INT_DE_OFFSET, pin); |
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sys_clear_bit(base + IPROC_GPIO_INT_EDGE_OFFSET, pin); |
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} |
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/* Unmask the interrupt */ |
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sys_clear_bit(base + IPROC_GPIO_INT_MSTAT_OFFSET, pin); |
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} else { |
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sys_set_bit(base + IPROC_GPIO_INT_MSK_OFFSET, pin); |
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} |
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return 0; |
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} |
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static void gpio_iproc_isr(const struct device *dev) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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mem_addr_t base = cfg->base; |
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struct gpio_iproc_data *context = dev->data; |
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uint32_t int_stat; |
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int_stat = sys_read32(base + IPROC_GPIO_INT_STAT_OFFSET); |
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/* Clear the source of the interrupt */ |
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sys_write32(int_stat, base + IPROC_GPIO_INT_CLR_OFFSET); |
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/* Handle the interrupt */ |
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gpio_fire_callbacks(&context->cb, dev, int_stat); |
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} |
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static int gpio_iproc_manage_callback(const struct device *port, struct gpio_callback *callback, |
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bool set) |
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{ |
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struct gpio_iproc_data *context = port->data; |
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return gpio_manage_callback(&context->cb, callback, set); |
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} |
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static DEVICE_API(gpio, gpio_iproc_api) = { |
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.pin_configure = gpio_iproc_configure, |
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.port_get_raw = gpio_iproc_port_get_raw, |
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.port_set_masked_raw = gpio_iproc_port_set_masked_raw, |
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.port_set_bits_raw = gpio_iproc_port_set_bits_raw, |
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.port_clear_bits_raw = gpio_iproc_port_clear_bits_raw, |
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.port_toggle_bits = gpio_iproc_port_toggle_bits, |
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.pin_interrupt_configure = gpio_iproc_pin_interrupt_configure, |
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.manage_callback = gpio_iproc_manage_callback, |
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}; |
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int gpio_iproc_init(const struct device *dev) |
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{ |
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const struct gpio_iproc_config *const cfg = DEV_CFG(dev); |
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cfg->irq_config_func(dev); |
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return 0; |
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} |
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#define GPIO_IPROC_INIT(n) \ |
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static void port_iproc_config_func_##n(const struct device *dev) \ |
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{ \ |
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IRQ_CONNECT(DT_INST_IRQN(n), DT_INST_IRQ(n, priority), gpio_iproc_isr, \ |
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DEVICE_DT_INST_GET(n), 0); \ |
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irq_enable(DT_INST_IRQN(n)); \ |
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} \ |
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\ |
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static const struct gpio_iproc_config gpio_port_config_##n = { \ |
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.common = \ |
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{ \ |
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.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n), \ |
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}, \ |
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.base = DT_INST_REG_ADDR(n), \ |
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.irq_config_func = port_iproc_config_func_##n, \ |
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}; \ |
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\ |
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static struct gpio_iproc_data gpio_port_data_##n; \ |
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\ |
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DEVICE_DT_INST_DEFINE(n, gpio_iproc_init, NULL, &gpio_port_data_##n, \ |
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&gpio_port_config_##n, POST_KERNEL, CONFIG_GPIO_INIT_PRIORITY, \ |
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&gpio_iproc_api); |
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DT_INST_FOREACH_STATUS_OKAY(GPIO_IPROC_INIT)
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