1/*
2 * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
3 *
4 * Copyright (C) 2007  Magnus Damm
5 * Copyright (C) 2000  Kazumoto Kojima
6 *
7 * Renesas Technology Sales RTS7751R2D Support, R2D-PLUS and R2D-1.
8 *
9 * Modified for RTS7751R2D by
10 * Atom Create Engineering Co., Ltd. 2002.
11 */
12#include <linux/init.h>
13#include <linux/irq.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <mach/r2d.h>
17
18#define R2D_NR_IRL 13
19
20enum {
21	UNUSED = 0,
22
23	/* board specific interrupt sources (R2D-1 and R2D-PLUS) */
24	EXT,              /* EXT_INT0-3 */
25	RTC_T, RTC_A,     /* Real Time Clock */
26	AX88796,          /* Ethernet controller (R2D-1 board) */
27	KEY,              /* Key input (R2D-PLUS board) */
28	SDCARD,           /* SD Card */
29	CF_CD, CF_IDE,    /* CF Card Detect + CF IDE */
30	SM501,            /* SM501 aka Voyager */
31	PCI_INTD_RTL8139, /* Ethernet controller */
32	PCI_INTC_PCI1520, /* Cardbus/PCMCIA bridge */
33	PCI_INTB_RTL8139, /* Ethernet controller with HUB (R2D-PLUS board) */
34	PCI_INTB_SLOT,    /* PCI Slot 3.3v (R2D-1 board) */
35	PCI_INTA_SLOT,    /* PCI Slot 3.3v */
36	TP,               /* Touch Panel */
37};
38
39#ifdef CONFIG_RTS7751R2D_1
40
41/* Vectors for R2D-1 */
42static struct intc_vect vectors_r2d_1[] __initdata = {
43	INTC_IRQ(EXT, IRQ_EXT),
44	INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
45	INTC_IRQ(AX88796, IRQ_AX88796), INTC_IRQ(SDCARD, IRQ_SDCARD),
46	INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE), /* ng */
47	INTC_IRQ(SM501, IRQ_VOYAGER),
48	INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
49	INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
50	INTC_IRQ(PCI_INTB_SLOT, IRQ_PCI_INTB),
51	INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
52	INTC_IRQ(TP, IRQ_TP),
53};
54
55/* IRLMSK mask register layout for R2D-1 */
56static struct intc_mask_reg mask_registers_r2d_1[] __initdata = {
57	{ 0xa4000000, 0, 16, /* IRLMSK */
58	  { TP, PCI_INTA_SLOT, PCI_INTB_SLOT,
59	    PCI_INTC_PCI1520, PCI_INTD_RTL8139,
60	    SM501, CF_IDE, CF_CD, SDCARD, AX88796,
61	    RTC_A, RTC_T, 0, 0, 0, EXT } },
62};
63
64/* IRLn to IRQ table for R2D-1 */
65static unsigned char irl2irq_r2d_1[R2D_NR_IRL] __initdata = {
66	IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
67	IRQ_VOYAGER, IRQ_AX88796, IRQ_RTC_A, IRQ_RTC_T,
68	IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
69	IRQ_TP,
70};
71
72static DECLARE_INTC_DESC(intc_desc_r2d_1, "r2d-1", vectors_r2d_1,
73			 NULL, mask_registers_r2d_1, NULL, NULL);
74
75#endif /* CONFIG_RTS7751R2D_1 */
76
77#ifdef CONFIG_RTS7751R2D_PLUS
78
79/* Vectors for R2D-PLUS */
80static struct intc_vect vectors_r2d_plus[] __initdata = {
81	INTC_IRQ(EXT, IRQ_EXT),
82	INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
83	INTC_IRQ(KEY, IRQ_KEY), INTC_IRQ(SDCARD, IRQ_SDCARD),
84	INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE),
85	INTC_IRQ(SM501, IRQ_VOYAGER),
86	INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
87	INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
88	INTC_IRQ(PCI_INTB_RTL8139, IRQ_PCI_INTB),
89	INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
90	INTC_IRQ(TP, IRQ_TP),
91};
92
93/* IRLMSK mask register layout for R2D-PLUS */
94static struct intc_mask_reg mask_registers_r2d_plus[] __initdata = {
95	{ 0xa4000000, 0, 16, /* IRLMSK */
96	  { TP, PCI_INTA_SLOT, PCI_INTB_RTL8139,
97	    PCI_INTC_PCI1520, PCI_INTD_RTL8139,
98	    SM501, CF_IDE, CF_CD, SDCARD, KEY,
99	    RTC_A, RTC_T, 0, 0, 0, EXT } },
100};
101
102/* IRLn to IRQ table for R2D-PLUS */
103static unsigned char irl2irq_r2d_plus[R2D_NR_IRL] __initdata = {
104	IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
105	IRQ_VOYAGER, IRQ_KEY, IRQ_RTC_A, IRQ_RTC_T,
106	IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
107	IRQ_TP,
108};
109
110static DECLARE_INTC_DESC(intc_desc_r2d_plus, "r2d-plus", vectors_r2d_plus,
111			 NULL, mask_registers_r2d_plus, NULL, NULL);
112
113#endif /* CONFIG_RTS7751R2D_PLUS */
114
115static unsigned char irl2irq[R2D_NR_IRL];
116
117int rts7751r2d_irq_demux(int irq)
118{
119	if (irq >= R2D_NR_IRL || irq < 0 || !irl2irq[irq])
120		return irq;
121
122	return irl2irq[irq];
123}
124
125/*
126 * Initialize IRQ setting
127 */
128void __init init_rts7751r2d_IRQ(void)
129{
130	struct intc_desc *d;
131
132	switch (__raw_readw(PA_VERREG) & 0xf0) {
133#ifdef CONFIG_RTS7751R2D_PLUS
134	case 0x10:
135		printk(KERN_INFO "Using R2D-PLUS interrupt controller.\n");
136		d = &intc_desc_r2d_plus;
137		memcpy(irl2irq, irl2irq_r2d_plus, R2D_NR_IRL);
138		break;
139#endif
140#ifdef CONFIG_RTS7751R2D_1
141	case 0x00: /* according to manual */
142	case 0x30: /* in reality */
143		printk(KERN_INFO "Using R2D-1 interrupt controller.\n");
144		d = &intc_desc_r2d_1;
145		memcpy(irl2irq, irl2irq_r2d_1, R2D_NR_IRL);
146		break;
147#endif
148	default:
149		printk(KERN_INFO "Unknown R2D interrupt controller 0x%04x\n",
150		       __raw_readw(PA_VERREG));
151		return;
152	}
153
154	register_intc_controller(d);
155}
156