103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* H8S interrupt contoller driver
|
|
*
|
|
* Copyright 2015 Yoshinori Sato <ysato@users.sourceforge.jp>
|
|
*/
|
|
|
|
#include <linux/irq.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_irq.h>
|
|
#include <asm/io.h>
|
|
|
|
static void *intc_baseaddr;
|
|
#define IPRA ((unsigned long)intc_baseaddr)
|
|
|
|
static const unsigned char ipr_table[] = {
|
|
0x03, 0x02, 0x01, 0x00, 0x13, 0x12, 0x11, 0x10, /* 16 - 23 */
|
|
0x23, 0x22, 0x21, 0x20, 0x33, 0x32, 0x31, 0x30, /* 24 - 31 */
|
|
0x43, 0x42, 0x41, 0x40, 0x53, 0x53, 0x52, 0x52, /* 32 - 39 */
|
|
0x51, 0x51, 0x51, 0x51, 0x51, 0x51, 0x51, 0x51, /* 40 - 47 */
|
|
0x50, 0x50, 0x50, 0x50, 0x63, 0x63, 0x63, 0x63, /* 48 - 55 */
|
|
0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, /* 56 - 63 */
|
|
0x61, 0x61, 0x61, 0x61, 0x60, 0x60, 0x60, 0x60, /* 64 - 71 */
|
|
0x73, 0x73, 0x73, 0x73, 0x72, 0x72, 0x72, 0x72, /* 72 - 79 */
|
|
0x71, 0x71, 0x71, 0x71, 0x70, 0x83, 0x82, 0x81, /* 80 - 87 */
|
|
0x80, 0x80, 0x80, 0x80, 0x93, 0x93, 0x93, 0x93, /* 88 - 95 */
|
|
0x92, 0x92, 0x92, 0x92, 0x91, 0x91, 0x91, 0x91, /* 96 - 103 */
|
|
0x90, 0x90, 0x90, 0x90, 0xa3, 0xa3, 0xa3, 0xa3, /* 104 - 111 */
|
|
0xa2, 0xa2, 0xa2, 0xa2, 0xa1, 0xa1, 0xa1, 0xa1, /* 112 - 119 */
|
|
0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, /* 120 - 127 */
|
|
};
|
|
|
|
static void h8s_disable_irq(struct irq_data *data)
|
|
{
|
|
int pos;
|
|
unsigned int addr;
|
|
unsigned short pri;
|
|
int irq = data->irq;
|
|
|
|
addr = IPRA + ((ipr_table[irq - 16] & 0xf0) >> 3);
|
|
pos = (ipr_table[irq - 16] & 0x0f) * 4;
|
|
pri = ~(0x000f << pos);
|
|
pri &= readw(addr);
|
|
writew(pri, addr);
|
|
}
|
|
|
|
static void h8s_enable_irq(struct irq_data *data)
|
|
{
|
|
int pos;
|
|
unsigned int addr;
|
|
unsigned short pri;
|
|
int irq = data->irq;
|
|
|
|
addr = IPRA + ((ipr_table[irq - 16] & 0xf0) >> 3);
|
|
pos = (ipr_table[irq - 16] & 0x0f) * 4;
|
|
pri = ~(0x000f << pos);
|
|
pri &= readw(addr);
|
|
pri |= 1 << pos;
|
|
writew(pri, addr);
|
|
}
|
|
|
|
struct irq_chip h8s_irq_chip = {
|
|
.name = "H8S-INTC",
|
|
.irq_enable = h8s_enable_irq,
|
|
.irq_disable = h8s_disable_irq,
|
|
};
|
|
|
|
static __init int irq_map(struct irq_domain *h, unsigned int virq,
|
|
irq_hw_number_t hw_irq_num)
|
|
{
|
|
irq_set_chip_and_handler(virq, &h8s_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 h8s_intc_of_init(struct device_node *intc,
|
|
struct device_node *parent)
|
|
{
|
|
struct irq_domain *domain;
|
|
int n;
|
|
|
|
intc_baseaddr = of_iomap(intc, 0);
|
|
BUG_ON(!intc_baseaddr);
|
|
|
|
/* All interrupt priority is 0 (disable) */
|
|
/* IPRA to IPRK */
|
|
for (n = 0; n <= 'k' - 'a'; n++)
|
|
writew(0x0000, IPRA + (n * 2));
|
|
|
|
domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);
|
|
BUG_ON(!domain);
|
|
irq_set_default_host(domain);
|
|
return 0;
|
|
}
|
|
|
|
IRQCHIP_DECLARE(h8s_intc, "renesas,h8s-intc", h8s_intc_of_init);
|