1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
4  *
5  * Copyright (C) 2007  Magnus Damm
6  * Copyright (C) 2000  Kazumoto Kojima
7  *
8  * Renesas Technology Sales RTS7751R2D Support, R2D-PLUS and R2D-1.
9  *
10  * Modified for RTS7751R2D by
11  * Atom Create Engineering Co., Ltd. 2002.
12  */
13 #include <linux/init.h>
14 #include <linux/irq.h>
15 #include <linux/interrupt.h>
16 #include <linux/io.h>
17 #include <mach/r2d.h>
18 
19 #define R2D_NR_IRL 13
20 
21 enum {
22 	UNUSED = 0,
23 
24 	/* board specific interrupt sources (R2D-1 and R2D-PLUS) */
25 	EXT,              /* EXT_INT0-3 */
26 	RTC_T, RTC_A,     /* Real Time Clock */
27 	AX88796,          /* Ethernet controller (R2D-1 board) */
28 	KEY,              /* Key input (R2D-PLUS board) */
29 	SDCARD,           /* SD Card */
30 	CF_CD, CF_IDE,    /* CF Card Detect + CF IDE */
31 	SM501,            /* SM501 aka Voyager */
32 	PCI_INTD_RTL8139, /* Ethernet controller */
33 	PCI_INTC_PCI1520, /* Cardbus/PCMCIA bridge */
34 	PCI_INTB_RTL8139, /* Ethernet controller with HUB (R2D-PLUS board) */
35 	PCI_INTB_SLOT,    /* PCI Slot 3.3v (R2D-1 board) */
36 	PCI_INTA_SLOT,    /* PCI Slot 3.3v */
37 	TP,               /* Touch Panel */
38 };
39 
40 #ifdef CONFIG_RTS7751R2D_1
41 
42 /* Vectors for R2D-1 */
43 static struct intc_vect vectors_r2d_1[] __initdata = {
44 	INTC_IRQ(EXT, IRQ_EXT),
45 	INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
46 	INTC_IRQ(AX88796, IRQ_AX88796), INTC_IRQ(SDCARD, IRQ_SDCARD),
47 	INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE), /* ng */
48 	INTC_IRQ(SM501, IRQ_VOYAGER),
49 	INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
50 	INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
51 	INTC_IRQ(PCI_INTB_SLOT, IRQ_PCI_INTB),
52 	INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
53 	INTC_IRQ(TP, IRQ_TP),
54 };
55 
56 /* IRLMSK mask register layout for R2D-1 */
57 static struct intc_mask_reg mask_registers_r2d_1[] __initdata = {
58 	{ 0xa4000000, 0, 16, /* IRLMSK */
59 	  { TP, PCI_INTA_SLOT, PCI_INTB_SLOT,
60 	    PCI_INTC_PCI1520, PCI_INTD_RTL8139,
61 	    SM501, CF_IDE, CF_CD, SDCARD, AX88796,
62 	    RTC_A, RTC_T, 0, 0, 0, EXT } },
63 };
64 
65 /* IRLn to IRQ table for R2D-1 */
66 static unsigned char irl2irq_r2d_1[R2D_NR_IRL] __initdata = {
67 	IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
68 	IRQ_VOYAGER, IRQ_AX88796, IRQ_RTC_A, IRQ_RTC_T,
69 	IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
70 	IRQ_TP,
71 };
72 
73 static DECLARE_INTC_DESC(intc_desc_r2d_1, "r2d-1", vectors_r2d_1,
74 			 NULL, mask_registers_r2d_1, NULL, NULL);
75 
76 #endif /* CONFIG_RTS7751R2D_1 */
77 
78 #ifdef CONFIG_RTS7751R2D_PLUS
79 
80 /* Vectors for R2D-PLUS */
81 static struct intc_vect vectors_r2d_plus[] __initdata = {
82 	INTC_IRQ(EXT, IRQ_EXT),
83 	INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
84 	INTC_IRQ(KEY, IRQ_KEY), INTC_IRQ(SDCARD, IRQ_SDCARD),
85 	INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE),
86 	INTC_IRQ(SM501, IRQ_VOYAGER),
87 	INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
88 	INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
89 	INTC_IRQ(PCI_INTB_RTL8139, IRQ_PCI_INTB),
90 	INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
91 	INTC_IRQ(TP, IRQ_TP),
92 };
93 
94 /* IRLMSK mask register layout for R2D-PLUS */
95 static struct intc_mask_reg mask_registers_r2d_plus[] __initdata = {
96 	{ 0xa4000000, 0, 16, /* IRLMSK */
97 	  { TP, PCI_INTA_SLOT, PCI_INTB_RTL8139,
98 	    PCI_INTC_PCI1520, PCI_INTD_RTL8139,
99 	    SM501, CF_IDE, CF_CD, SDCARD, KEY,
100 	    RTC_A, RTC_T, 0, 0, 0, EXT } },
101 };
102 
103 /* IRLn to IRQ table for R2D-PLUS */
104 static unsigned char irl2irq_r2d_plus[R2D_NR_IRL] __initdata = {
105 	IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
106 	IRQ_VOYAGER, IRQ_KEY, IRQ_RTC_A, IRQ_RTC_T,
107 	IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
108 	IRQ_TP,
109 };
110 
111 static DECLARE_INTC_DESC(intc_desc_r2d_plus, "r2d-plus", vectors_r2d_plus,
112 			 NULL, mask_registers_r2d_plus, NULL, NULL);
113 
114 #endif /* CONFIG_RTS7751R2D_PLUS */
115 
116 static unsigned char irl2irq[R2D_NR_IRL];
117 
rts7751r2d_irq_demux(int irq)118 int rts7751r2d_irq_demux(int irq)
119 {
120 	if (irq >= R2D_NR_IRL + 16 || irq < 16 || !irl2irq[irq - 16])
121 		return irq;
122 
123 	return irl2irq[irq - 16];
124 }
125 
126 /*
127  * Initialize IRQ setting
128  */
init_rts7751r2d_IRQ(void)129 void __init init_rts7751r2d_IRQ(void)
130 {
131 	struct intc_desc *d;
132 
133 	switch (__raw_readw(PA_VERREG) & 0xf0) {
134 #ifdef CONFIG_RTS7751R2D_PLUS
135 	case 0x10:
136 		printk(KERN_INFO "Using R2D-PLUS interrupt controller.\n");
137 		d = &intc_desc_r2d_plus;
138 		memcpy(irl2irq, irl2irq_r2d_plus, R2D_NR_IRL);
139 		break;
140 #endif
141 #ifdef CONFIG_RTS7751R2D_1
142 	case 0x00: /* according to manual */
143 	case 0x30: /* in reality */
144 		printk(KERN_INFO "Using R2D-1 interrupt controller.\n");
145 		d = &intc_desc_r2d_1;
146 		memcpy(irl2irq, irl2irq_r2d_1, R2D_NR_IRL);
147 		break;
148 #endif
149 	default:
150 		printk(KERN_INFO "Unknown R2D interrupt controller 0x%04x\n",
151 		       __raw_readw(PA_VERREG));
152 		return;
153 	}
154 
155 	register_intc_controller(d);
156 }
157