irq.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * linux/arch/sh/boards/se/770x/irq.c
  4 *
  5 * Copyright (C) 2000  Kazumoto Kojima
  6 * Copyright (C) 2006  Nobuhiro Iwamatsu
  7 *
  8 * Hitachi SolutionEngine Support.
  9 *
 10 */
 11
 12#include <linux/init.h>
 13#include <linux/interrupt.h>
 14#include <linux/irq.h>
 15#include <asm/irq.h>
 16#include <asm/io.h>
 17#include <mach-se/mach/se.h>
 18
 19static struct ipr_data ipr_irq_table[] = {
 20	/*
 21	* Super I/O (Just mimic PC):
 22	*  1: keyboard
 23	*  3: serial 0
 24	*  4: serial 1
 25	*  5: printer
 26	*  6: floppy
 27	*  8: rtc
 28	* 12: mouse
 29	* 14: ide0
 30	*/
 31#if defined(CONFIG_CPU_SUBTYPE_SH7705)
 32	/* This is default value */
 33	{ 13, 0, 8,  0x0f-13, },
 34	{ 5 , 0, 4,  0x0f- 5, },
 35	{ 10, 1, 0,  0x0f-10, },
 36	{ 7 , 2, 4,  0x0f- 7, },
 37	{ 3 , 2, 0,  0x0f- 3, },
 38	{ 1 , 3, 12, 0x0f- 1, },
 39	{ 12, 3, 4,  0x0f-12, }, /* LAN */
 40	{ 2 , 4, 8,  0x0f- 2, }, /* PCIRQ2 */
 41	{ 6 , 4, 4,  0x0f- 6, }, /* PCIRQ1 */
 42	{ 14, 4, 0,  0x0f-14, }, /* PCIRQ0 */
 43	{ 0 , 5, 12, 0x0f   , }, 
 44	{ 4 , 5, 4,  0x0f- 4, },
 45	{ 8 , 6, 12, 0x0f- 8, },
 46	{ 9 , 6, 8,  0x0f- 9, },
 47	{ 11, 6, 4,  0x0f-11, },
 48#else
 49	{ 14, 0,  8, 0x0f-14, },
 50	{ 12, 0,  4, 0x0f-12, },
 51	{  8, 1,  4, 0x0f- 8, },
 52	{  6, 2, 12, 0x0f- 6, },
 53	{  5, 2,  8, 0x0f- 5, },
 54	{  4, 2,  4, 0x0f- 4, },
 55	{  3, 2,  0, 0x0f- 3, },
 56	{  1, 3, 12, 0x0f- 1, },
 57#if defined(CONFIG_STNIC)
 58	/* ST NIC */
 59	{ 10, 3,  4, 0x0f-10, }, 	/* LAN */
 60#endif
 61	/* MRSHPC IRQs setting */
 62	{  0, 4, 12, 0x0f- 0, },	/* PCIRQ3 */
 63	{ 11, 4,  8, 0x0f-11, }, 	/* PCIRQ2 */
 64	{  9, 4,  4, 0x0f- 9, }, 	/* PCIRQ1 */
 65	{  7, 4,  0, 0x0f- 7, }, 	/* PCIRQ0 */
 66	/* #2, #13 are allocated for SLOT IRQ #1 and #2 (for now) */
 67	/* NOTE: #2 and #13 are not used on PC */
 68	{ 13, 6,  4, 0x0f-13, }, 	/* SLOTIRQ2 */
 69	{  2, 6,  0, 0x0f- 2, }, 	/* SLOTIRQ1 */
 70#endif
 71};
 72
 73static unsigned long ipr_offsets[] = {
 74	BCR_ILCRA,
 75	BCR_ILCRB,
 76	BCR_ILCRC,
 77	BCR_ILCRD,
 78	BCR_ILCRE,
 79	BCR_ILCRF,
 80	BCR_ILCRG,
 81};
 82
 83static struct ipr_desc ipr_irq_desc = {
 84	.ipr_offsets	= ipr_offsets,
 85	.nr_offsets	= ARRAY_SIZE(ipr_offsets),
 86
 87	.ipr_data	= ipr_irq_table,
 88	.nr_irqs	= ARRAY_SIZE(ipr_irq_table),
 89	.chip = {
 90		.name	= "IPR-se770x",
 91	},
 92};
 93
 94/*
 95 * Initialize IRQ setting
 96 */
 97void __init init_se_IRQ(void)
 98{
 99	/* Disable all interrupts */
100	__raw_writew(0, BCR_ILCRA);
101	__raw_writew(0, BCR_ILCRB);
102	__raw_writew(0, BCR_ILCRC);
103	__raw_writew(0, BCR_ILCRD);
104	__raw_writew(0, BCR_ILCRE);
105	__raw_writew(0, BCR_ILCRF);
106	__raw_writew(0, BCR_ILCRG);
107
108	register_ipr_controller(&ipr_irq_desc);
109}