diff options
Diffstat (limited to 'arch/arm/mach-iop3xx/iop321-irq.c')
-rw-r--r-- | arch/arm/mach-iop3xx/iop321-irq.c | 97 |
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 | |||
26 | static u32 iop321_mask /* = 0 */; | ||
27 | |||
28 | static inline void intctl_write(u32 val) | ||
29 | { | ||
30 | asm volatile("mcr p6,0,%0,c0,c0,0"::"r" (val)); | ||
31 | } | ||
32 | |||
33 | static inline void intstr_write(u32 val) | ||
34 | { | ||
35 | asm volatile("mcr p6,0,%0,c4,c0,0"::"r" (val)); | ||
36 | } | ||
37 | |||
38 | static void | ||
39 | iop321_irq_mask (unsigned int irq) | ||
40 | { | ||
41 | |||
42 | iop321_mask &= ~(1 << (irq - IOP321_IRQ_OFS)); | ||
43 | |||
44 | intctl_write(iop321_mask); | ||
45 | } | ||
46 | |||
47 | static void | ||
48 | iop321_irq_unmask (unsigned int irq) | ||
49 | { | ||
50 | iop321_mask |= (1 << (irq - IOP321_IRQ_OFS)); | ||
51 | |||
52 | intctl_write(iop321_mask); | ||
53 | } | ||
54 | |||
55 | struct irq_chip ext_chip = { | ||
56 | .name = "IOP", | ||
57 | .ack = iop321_irq_mask, | ||
58 | .mask = iop321_irq_mask, | ||
59 | .unmask = iop321_irq_unmask, | ||
60 | }; | ||
61 | |||
62 | void __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 | |||