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 | |
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 | */ |
129 | void __init init_rts7751r2d_IRQ(void) |
130 | { |
131 | struct intc_desc *d; |
132 | |
133 | switch (__raw_readw(addr: 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 | |