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gerrit-public.fairphone.software / kernel / msm / 0f36b018b2e314d45af86449f1a97facb1fbe300 / . / arch / mips / ddb5xxx / ddb5476 / irq.c
blob: 5388b5868c4a6b31ab5bb126bbde379f88d125f6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * arch/mips/ddb5476/irq.c -- NEC DDB Vrc-5476 interrupt routines
3 *
4 * Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
5 * Sony Software Development Center Europe (SDCE), Brussels
6 *
7 * Re-write the whole thing to use new irq.c file.
8 * Copyright (C) 2001 MontaVista Software Inc.
9 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
10 *
11 */
12#include <linux/init.h>
13#include <linux/sched.h>
14#include <linux/types.h>
15#include <linux/interrupt.h>
16
17#include <asm/i8259.h>
18#include <asm/io.h>
19#include <asm/ptrace.h>
20
21#include <asm/ddb5xxx/ddb5xxx.h>
22
23#define M1543_PNP_CONFIG 0x03f0 /* PnP Config Port */
24#define M1543_PNP_INDEX 0x03f0 /* PnP Index Port */
25#define M1543_PNP_DATA 0x03f1 /* PnP Data Port */
26
27#define M1543_PNP_ALT_CONFIG 0x0370 /* Alternative PnP Config Port */
28#define M1543_PNP_ALT_INDEX 0x0370 /* Alternative PnP Index Port */
29#define M1543_PNP_ALT_DATA 0x0371 /* Alternative PnP Data Port */
30
31#define M1543_INT1_MASTER_CTRL 0x0020 /* INT_1 (master) Control Register */
32#define M1543_INT1_MASTER_MASK 0x0021 /* INT_1 (master) Mask Register */
33
34#define M1543_INT1_SLAVE_CTRL 0x00a0 /* INT_1 (slave) Control Register */
35#define M1543_INT1_SLAVE_MASK 0x00a1 /* INT_1 (slave) Mask Register */
36
37#define M1543_INT1_MASTER_ELCR 0x04d0 /* INT_1 (master) Edge/Level Control */
38#define M1543_INT1_SLAVE_ELCR 0x04d1 /* INT_1 (slave) Edge/Level Control */
39
40static void m1543_irq_setup(void)
41{
42 /*
43 * The ALI M1543 has 13 interrupt inputs, IRQ1..IRQ13. Not all
44 * the possible IO sources in the M1543 are in use by us. We will
45 * use the following mapping:
46 *
47 * IRQ1 - keyboard (default set by M1543)
48 * IRQ3 - reserved for UART B (default set by M1543) (note that
49 * the schematics for the DDB Vrc-5476 board seem to
50 * indicate that IRQ3 is connected to the DS1386
51 * watchdog timer interrupt output so we might have
52 * a conflict)
53 * IRQ4 - reserved for UART A (default set by M1543)
54 * IRQ5 - parallel (default set by M1543)
55 * IRQ8 - DS1386 time of day (RTC) interrupt
56 * IRQ9 - USB (hardwired in ddb_setup)
57 * IRQ10 - PMU (hardwired in ddb_setup)
58 * IRQ12 - mouse
59 * IRQ14,15 - IDE controller (need to be confirmed, jsun)
60 */
61
62 /*
63 * Assing mouse interrupt to IRQ12
64 */
65
66 /* Enter configuration mode */
67 outb(0x51, M1543_PNP_CONFIG);
68 outb(0x23, M1543_PNP_CONFIG);
69
70 /* Select logical device 7 (Keyboard) */
71 outb(0x07, M1543_PNP_INDEX);
72 outb(0x07, M1543_PNP_DATA);
73
74 /* Select IRQ12 */
75 outb(0x72, M1543_PNP_INDEX);
76 outb(0x0c, M1543_PNP_DATA);
77
78 /* Leave configration mode */
79 outb(0xbb, M1543_PNP_CONFIG);
80}
81
82static void nile4_irq_setup(void)
83{
84 int i;
85
86 /* Map all interrupts to CPU int #0 (IP2) */
87 nile4_map_irq_all(0);
88
89 /* PCI INTA#-E# must be level triggered */
90 nile4_set_pci_irq_level_or_edge(0, 1);
91 nile4_set_pci_irq_level_or_edge(1, 1);
92 nile4_set_pci_irq_level_or_edge(2, 1);
93 nile4_set_pci_irq_level_or_edge(3, 1);
94
95 /* PCI INTA#, B#, D# must be active low, INTC# must be active high */
96 nile4_set_pci_irq_polarity(0, 0);
97 nile4_set_pci_irq_polarity(1, 0);
98 nile4_set_pci_irq_polarity(2, 1);
99 nile4_set_pci_irq_polarity(3, 0);
100
101 for (i = 0; i < 16; i++)
102 nile4_clear_irq(i);
103
104 /* Enable CPU int #0 */
105 nile4_enable_irq_output(0);
106
107 /* memory resource acquire in ddb_setup */
108}
109
110static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
111static struct irqaction irq_error = { no_action, 0, CPU_MASK_NONE, "error", NULL, NULL };
112
113extern asmlinkage void ddb5476_handle_int(void);
114extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
115extern void mips_cpu_irq_init(u32 irq_base);
116extern void vrc5476_irq_init(u32 irq_base);
117
118void __init arch_init_irq(void)
119{
120 /* hardware initialization */
121 nile4_irq_setup();
122 m1543_irq_setup();
123
124 /* controller setup */
125 init_i8259_irqs();
126 vrc5476_irq_init(VRC5476_IRQ_BASE);
127 mips_cpu_irq_init(CPU_IRQ_BASE);
128
129 /* setup cascade interrupts */
130 setup_irq(VRC5476_IRQ_BASE + VRC5476_I8259_CASCADE, &irq_cascade);
131 setup_irq(CPU_IRQ_BASE + CPU_VRC5476_CASCADE, &irq_cascade);
132
133 /* setup error interrupts for debugging */
134 setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_CPCE, &irq_error);
135 setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_CNTD, &irq_error);
136 setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_MCE, &irq_error);
137 setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_LBRT, &irq_error);
138 setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCIS, &irq_error);
139 setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCI, &irq_error);
140
141 /* setup the grandpa intr vector */
142 set_except_vector(0, ddb5476_handle_int);
143}