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 
19 static 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 
73 static 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 
83 static 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  */
init_se_IRQ(void)97 void __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 }
110