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| // SPDX-License-Identifier: GPL-2.0
| /*
| * H8/300H interrupt controller driver
| *
| * Copyright 2015 Yoshinori Sato <ysato@users.sourceforge.jp>
| */
|
| #include <linux/init.h>
| #include <linux/irq.h>
| #include <linux/irqchip.h>
| #include <linux/of_address.h>
| #include <linux/of_irq.h>
| #include <asm/io.h>
|
| static const char ipr_bit[] = {
| 7, 6, 5, 5,
| 4, 4, 4, 4, 3, 3, 3, 3,
| 2, 2, 2, 2, 1, 1, 1, 1,
| 0, 0, 0, 0, 15, 15, 15, 15,
| 14, 14, 14, 14, 13, 13, 13, 13,
| -1, -1, -1, -1, 11, 11, 11, 11,
| 10, 10, 10, 10, 9, 9, 9, 9,
| };
|
| static void __iomem *intc_baseaddr;
|
| #define IPR (intc_baseaddr + 6)
|
| static void h8300h_disable_irq(struct irq_data *data)
| {
| int bit;
| int irq = data->irq - 12;
|
| bit = ipr_bit[irq];
| if (bit >= 0) {
| if (bit < 8)
| ctrl_bclr(bit & 7, IPR);
| else
| ctrl_bclr(bit & 7, (IPR+1));
| }
| }
|
| static void h8300h_enable_irq(struct irq_data *data)
| {
| int bit;
| int irq = data->irq - 12;
|
| bit = ipr_bit[irq];
| if (bit >= 0) {
| if (bit < 8)
| ctrl_bset(bit & 7, IPR);
| else
| ctrl_bset(bit & 7, (IPR+1));
| }
| }
|
| struct irq_chip h8300h_irq_chip = {
| .name = "H8/300H-INTC",
| .irq_enable = h8300h_enable_irq,
| .irq_disable = h8300h_disable_irq,
| };
|
| static int irq_map(struct irq_domain *h, unsigned int virq,
| irq_hw_number_t hw_irq_num)
| {
| irq_set_chip_and_handler(virq, &h8300h_irq_chip, handle_simple_irq);
|
| return 0;
| }
|
| static const struct irq_domain_ops irq_ops = {
| .map = irq_map,
| .xlate = irq_domain_xlate_onecell,
| };
|
| static int __init h8300h_intc_of_init(struct device_node *intc,
| struct device_node *parent)
| {
| struct irq_domain *domain;
|
| intc_baseaddr = of_iomap(intc, 0);
| BUG_ON(!intc_baseaddr);
|
| /* All interrupt priority low */
| writeb(0x00, IPR + 0);
| writeb(0x00, IPR + 1);
|
| domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);
| BUG_ON(!domain);
| irq_set_default_host(domain);
| return 0;
| }
|
| IRQCHIP_DECLARE(h8300h_intc, "renesas,h8300h-intc", h8300h_intc_of_init);
|
|
