blob: 83a1c5eae3f8103c09e07fb1f3fbc2ebe000300c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* This file define the irq handler for MSP SLM subsystem interrupts.
*
* Copyright 2005-2006 PMC-Sierra, Inc, derived from irq_cpu.c
* Author: Andrew Hughes, Andrew_Hughes@pmc-sierra.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <asm/mipsregs.h>
#include <msp_slp_int.h>
#include <msp_regs.h>
static inline void unmask_msp_slp_irq(struct irq_data *d)
{
unsigned int irq = d->irq;
/* check for PER interrupt range */
if (irq < MSP_PER_INTBASE)
*SLP_INT_MSK_REG |= (1 << (irq - MSP_SLP_INTBASE));
else
*PER_INT_MSK_REG |= (1 << (irq - MSP_PER_INTBASE));
}
static inline void mask_msp_slp_irq(struct irq_data *d)
{
unsigned int irq = d->irq;
/* check for PER interrupt range */
if (irq < MSP_PER_INTBASE)
*SLP_INT_MSK_REG &= ~(1 << (irq - MSP_SLP_INTBASE));
else
*PER_INT_MSK_REG &= ~(1 << (irq - MSP_PER_INTBASE));
}
/*
* While we ack the interrupt interrupts are disabled and thus we don't need
* to deal with concurrency issues. Same for msp_slp_irq_end.
*/
static inline void ack_msp_slp_irq(struct irq_data *d)
{
unsigned int irq = d->irq;
/* check for PER interrupt range */
if (irq < MSP_PER_INTBASE)
*SLP_INT_STS_REG = (1 << (irq - MSP_SLP_INTBASE));
else
*PER_INT_STS_REG = (1 << (irq - MSP_PER_INTBASE));
}
static struct irq_chip msp_slp_irq_controller = {
.name = "MSP_SLP",
.irq_ack = ack_msp_slp_irq,
.irq_mask = mask_msp_slp_irq,
.irq_unmask = unmask_msp_slp_irq,
};
void __init msp_slp_irq_init(void)
{
int i;
/* Mask/clear interrupts. */
*SLP_INT_MSK_REG = 0x00000000;
*PER_INT_MSK_REG = 0x00000000;
*SLP_INT_STS_REG = 0xFFFFFFFF;
*PER_INT_STS_REG = 0xFFFFFFFF;
/* initialize all the IRQ descriptors */
for (i = MSP_SLP_INTBASE; i < MSP_PER_INTBASE + 32; i++)
irq_set_chip_and_handler(i, &msp_slp_irq_controller,
handle_level_irq);
}
void msp_slp_irq_dispatch(void)
{
u32 pending;
int intbase;
intbase = MSP_SLP_INTBASE;
pending = *SLP_INT_STS_REG & *SLP_INT_MSK_REG;
/* check for PER interrupt */
if (pending == (1 << (MSP_INT_PER - MSP_SLP_INTBASE))) {
intbase = MSP_PER_INTBASE;
pending = *PER_INT_STS_REG & *PER_INT_MSK_REG;
}
/* check for spurious interrupt */
if (pending == 0x00000000) {
printk(KERN_ERR "Spurious %s interrupt?\n",
(intbase == MSP_SLP_INTBASE) ? "SLP" : "PER");
return;
}
/* dispatch the irq */
do_IRQ(ffs(pending) + intbase - 1);
}
|
