blob: 01d2633413d57d374b2f35f0f6bcb77858669e23 [file] [log] [blame]
/* Copyright (C) 2023 BeagleBoard.org Foundation
* Copyright (C) 2023 S Prashanth
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT ti_vim
#include <stdint.h>
#include <zephyr/arch/arm/irq.h>
#include <zephyr/arch/cpu.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/interrupt_controller/intc_vim.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include <zephyr/sys/util_macro.h>
LOG_MODULE_REGISTER(vim);
unsigned int z_vim_irq_get_active(void)
{
uint32_t irq_group_num, irq_bit_num;
uint32_t actirq, vec_addr;
/* Reading IRQVEC register, ACTIRQ gets loaded with valid IRQ values */
vec_addr = sys_read32(VIM_IRQVEC);
/* ACTIRQ register should be read only after reading IRQVEC register */
actirq = sys_read32(VIM_ACTIRQ);
/* Check if the irq number is valid, else return invalid irq number.
* which will be considered as spurious interrupt
*/
if ((actirq & (VIM_ACTIRQ_VALID_MASK)) == 0) {
return CONFIG_NUM_IRQS + 1;
}
irq_group_num = VIM_GET_IRQ_GROUP_NUM(actirq & VIM_PRIIRQ_NUM_MASK);
irq_bit_num = VIM_GET_IRQ_BIT_NUM(actirq & VIM_PRIIRQ_NUM_MASK);
/* Ack the interrupt in IRQSTS register */
sys_write32(BIT(irq_bit_num), VIM_IRQSTS(irq_group_num));
if (irq_group_num > VIM_MAX_GROUP_NUM) {
return (CONFIG_NUM_IRQS + 1);
}
return (actirq & VIM_ACTIRQ_NUM_MASK);
}
void z_vim_irq_eoi(unsigned int irq)
{
sys_write32(0, VIM_IRQVEC);
}
void z_vim_irq_init(void)
{
uint32_t num_of_irqs = sys_read32(VIM_INFO_INTERRUPTS_MASK);
LOG_DBG("VIM: Number of IRQs = %u\n", num_of_irqs);
}
void z_vim_irq_priority_set(unsigned int irq, unsigned int prio, uint32_t flags)
{
uint32_t irq_group_num, irq_bit_num, regval;
if (irq > CONFIG_NUM_IRQS || prio > VIM_PRI_INT_MAX ||
(flags != IRQ_TYPE_EDGE && flags != IRQ_TYPE_LEVEL)) {
LOG_ERR("%s: Invalid argument irq = %u prio = %u flags = %u\n",
__func__, irq, prio, flags);
return;
}
sys_write8(prio, VIM_PRI_INT(irq));
irq_group_num = VIM_GET_IRQ_GROUP_NUM(irq);
irq_bit_num = VIM_GET_IRQ_BIT_NUM(irq);
regval = sys_read32(VIM_INTTYPE(irq_group_num));
if (flags == IRQ_TYPE_EDGE) {
regval |= (BIT(irq_bit_num));
} else {
regval &= ~(BIT(irq_bit_num));
}
sys_write32(regval, VIM_INTTYPE(irq_group_num));
}
void z_vim_irq_enable(unsigned int irq)
{
uint32_t irq_group_num, irq_bit_num;
if (irq > CONFIG_NUM_IRQS) {
LOG_ERR("%s: Invalid irq number = %u\n", __func__, irq);
return;
}
irq_group_num = VIM_GET_IRQ_GROUP_NUM(irq);
irq_bit_num = VIM_GET_IRQ_BIT_NUM(irq);
sys_write32(BIT(irq_bit_num), VIM_INTR_EN_SET(irq_group_num));
}
void z_vim_irq_disable(unsigned int irq)
{
uint32_t irq_group_num, irq_bit_num;
if (irq > CONFIG_NUM_IRQS) {
LOG_ERR("%s: Invalid irq number = %u\n", __func__, irq);
return;
}
irq_group_num = VIM_GET_IRQ_GROUP_NUM(irq);
irq_bit_num = VIM_GET_IRQ_BIT_NUM(irq);
sys_write32(BIT(irq_bit_num), VIM_INTR_EN_CLR(irq_group_num));
}
int z_vim_irq_is_enabled(unsigned int irq)
{
uint32_t irq_group_num, irq_bit_num, regval;
if (irq > CONFIG_NUM_IRQS) {
LOG_ERR("%s: Invalid irq number = %u\n", __func__, irq);
return -EINVAL;
}
irq_group_num = VIM_GET_IRQ_GROUP_NUM(irq);
irq_bit_num = VIM_GET_IRQ_BIT_NUM(irq);
regval = sys_read32(VIM_INTR_EN_SET(irq_group_num));
return !!(regval & (BIT(irq_bit_num)));
}
void z_vim_arm_enter_irq(int irq)
{
uint32_t irq_group_num, irq_bit_num;
if (irq > CONFIG_NUM_IRQS) {
LOG_ERR("%s: Invalid irq number = %u\n", __func__, irq);
return;
}
irq_group_num = VIM_GET_IRQ_GROUP_NUM(irq);
irq_bit_num = VIM_GET_IRQ_BIT_NUM(irq);
sys_write32(BIT(irq_bit_num), VIM_RAW(irq_group_num));
}