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-rw-r--r--arch/arm/mach-iop3xx/iop321-irq.c97
1 files changed, 0 insertions, 97 deletions
diff --git a/arch/arm/mach-iop3xx/iop321-irq.c b/arch/arm/mach-iop3xx/iop321-irq.c
deleted file mode 100644
index 88ac333472c8..000000000000
--- a/arch/arm/mach-iop3xx/iop321-irq.c
+++ /dev/null
@@ -1,97 +0,0 @@
1/*
2 * linux/arch/arm/mach-iop3xx/iop321-irq.c
3 *
4 * Generic IOP321 IRQ handling functionality
5 *
6 * Author: Rory Bolt <rorybolt@pacbell.net>
7 * Copyright (C) 2002 Rory Bolt
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Added IOP3XX chipset and IQ80321 board masking code.
14 *
15 */
16#include <linux/init.h>
17#include <linux/interrupt.h>
18#include <linux/list.h>
19
20#include <asm/mach/irq.h>
21#include <asm/irq.h>
22#include <asm/hardware.h>
23
24#include <asm/mach-types.h>
25
26static u32 iop321_mask /* = 0 */;
27
28static inline void intctl_write(u32 val)
29{
30 asm volatile("mcr p6,0,%0,c0,c0,0"::"r" (val));
31}
32
33static inline void intstr_write(u32 val)
34{
35 asm volatile("mcr p6,0,%0,c4,c0,0"::"r" (val));
36}
37
38static void
39iop321_irq_mask (unsigned int irq)
40{
41
42 iop321_mask &= ~(1 << (irq - IOP321_IRQ_OFS));
43
44 intctl_write(iop321_mask);
45}
46
47static void
48iop321_irq_unmask (unsigned int irq)
49{
50 iop321_mask |= (1 << (irq - IOP321_IRQ_OFS));
51
52 intctl_write(iop321_mask);
53}
54
55struct irq_chip ext_chip = {
56 .name = "IOP",
57 .ack = iop321_irq_mask,
58 .mask = iop321_irq_mask,
59 .unmask = iop321_irq_unmask,
60};
61
62void __init iop321_init_irq(void)
63{
64 unsigned int i, tmp;
65
66 /* Enable access to coprocessor 6 for dealing with IRQs.
67 * From RMK:
68 * Basically, the Intel documentation here is poor. It appears that
69 * you need to set the bit to be able to access the coprocessor from
70 * SVC mode. Whether that allows access from user space or not is
71 * unclear.
72 */
73 asm volatile (
74 "mrc p15, 0, %0, c15, c1, 0\n\t"
75 "orr %0, %0, %1\n\t"
76 "mcr p15, 0, %0, c15, c1, 0\n\t"
77 /* The action is delayed, so we have to do this: */
78 "mrc p15, 0, %0, c15, c1, 0\n\t"
79 "mov %0, %0\n\t"
80 "sub pc, pc, #4"
81 : "=r" (tmp) : "i" (1 << 6) );
82
83 intctl_write(0); // disable all interrupts
84 intstr_write(0); // treat all as IRQ
85 if(machine_is_iq80321() ||
86 machine_is_iq31244()) // all interrupts are inputs to chip
87 *IOP321_PCIIRSR = 0x0f;
88
89 for(i = IOP321_IRQ_OFS; i < NR_IOP321_IRQS; i++)
90 {
91 set_irq_chip(i, &ext_chip);
92 set_irq_handler(i, do_level_IRQ);
93 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
94
95 }
96}
97