LXR linux/arch/sh/kernel/cpu/sh3/setup-sh3.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Shared SH3 Setup code
   4 *
   5 *  Copyright (C) 2008  Magnus Damm
   6 */
   7
   8#include <linux/init.h>
   9#include <linux/irq.h>
  10#include <linux/io.h>
  11#include <asm/platform_early.h>
  12
  13/* All SH3 devices are equipped with IRQ0->5 (except sh7708) */
  14
  15enum {
  16        UNUSED = 0,
  17
  18        /* interrupt sources */
  19        IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5,
  20};
  21
  22static struct intc_vect vectors_irq0123[] __initdata = {
  23        INTC_VECT(IRQ0, 0x600), INTC_VECT(IRQ1, 0x620),
  24        INTC_VECT(IRQ2, 0x640), INTC_VECT(IRQ3, 0x660),
  25};
  26
  27static struct intc_vect vectors_irq45[] __initdata = {
  28        INTC_VECT(IRQ4, 0x680), INTC_VECT(IRQ5, 0x6a0),
  29};
  30
  31static struct intc_prio_reg prio_registers[] __initdata = {
  32        { 0xa4000016, 0, 16, 4, /* IPRC */ { IRQ3, IRQ2, IRQ1, IRQ0 } },
  33        { 0xa4000018, 0, 16, 4, /* IPRD */ { 0, 0, IRQ5, IRQ4 } },
  34};
  35
  36static struct intc_mask_reg ack_registers[] __initdata = {
  37        { 0xa4000004, 0, 8, /* IRR0 */
  38          { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } },
  39};
  40
  41static struct intc_sense_reg sense_registers[] __initdata = {
  42        { 0xa4000010, 16, 2, { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } },
  43};
  44
  45static DECLARE_INTC_DESC_ACK(intc_desc_irq0123, "sh3-irq0123",
  46                             vectors_irq0123, NULL, NULL,
  47                             prio_registers, sense_registers, ack_registers);
  48
  49static DECLARE_INTC_DESC_ACK(intc_desc_irq45, "sh3-irq45",
  50                             vectors_irq45, NULL, NULL,
  51                             prio_registers, sense_registers, ack_registers);
  52
  53#define INTC_ICR1               0xa4000010UL
  54#define INTC_ICR1_IRQLVL        (1<<14)
  55
  56void __init plat_irq_setup_pins(int mode)
  57{
  58        if (mode == IRQ_MODE_IRQ) {
  59                __raw_writew(__raw_readw(INTC_ICR1) & ~INTC_ICR1_IRQLVL, INTC_ICR1);
  60                register_intc_controller(&intc_desc_irq0123);
  61                return;
  62        }
  63        BUG();
  64}
  65
  66void __init plat_irq_setup_sh3(void)
  67{
  68        register_intc_controller(&intc_desc_irq45);
  69}
  70