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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* linux/arch/arm/mach-msm/irq.c
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/timer.h>
#include <linux/irq.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <mach/msm_iomap.h>
#define VIC_REG(off) (MSM_VIC_BASE + (off))
#define VIC_INT_SELECT0 VIC_REG(0x0000) /* 1: FIQ, 0: IRQ */
#define VIC_INT_SELECT1 VIC_REG(0x0004) /* 1: FIQ, 0: IRQ */
#define VIC_INT_EN0 VIC_REG(0x0010)
#define VIC_INT_EN1 VIC_REG(0x0014)
#define VIC_INT_ENCLEAR0 VIC_REG(0x0020)
#define VIC_INT_ENCLEAR1 VIC_REG(0x0024)
#define VIC_INT_ENSET0 VIC_REG(0x0030)
#define VIC_INT_ENSET1 VIC_REG(0x0034)
#define VIC_INT_TYPE0 VIC_REG(0x0040) /* 1: EDGE, 0: LEVEL */
#define VIC_INT_TYPE1 VIC_REG(0x0044) /* 1: EDGE, 0: LEVEL */
#define VIC_INT_POLARITY0 VIC_REG(0x0050) /* 1: NEG, 0: POS */
#define VIC_INT_POLARITY1 VIC_REG(0x0054) /* 1: NEG, 0: POS */
#define VIC_NO_PEND_VAL VIC_REG(0x0060)
#define VIC_INT_MASTEREN VIC_REG(0x0064) /* 1: IRQ, 2: FIQ */
#define VIC_PROTECTION VIC_REG(0x006C) /* 1: ENABLE */
#define VIC_CONFIG VIC_REG(0x0068) /* 1: USE ARM1136 VIC */
#define VIC_IRQ_STATUS0 VIC_REG(0x0080)
#define VIC_IRQ_STATUS1 VIC_REG(0x0084)
#define VIC_FIQ_STATUS0 VIC_REG(0x0090)
#define VIC_FIQ_STATUS1 VIC_REG(0x0094)
#define VIC_RAW_STATUS0 VIC_REG(0x00A0)
#define VIC_RAW_STATUS1 VIC_REG(0x00A4)
#define VIC_INT_CLEAR0 VIC_REG(0x00B0)
#define VIC_INT_CLEAR1 VIC_REG(0x00B4)
#define VIC_SOFTINT0 VIC_REG(0x00C0)
#define VIC_SOFTINT1 VIC_REG(0x00C4)
#define VIC_IRQ_VEC_RD VIC_REG(0x00D0) /* pending int # */
#define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4) /* pending vector addr */
#define VIC_IRQ_VEC_WR VIC_REG(0x00D8)
#define VIC_IRQ_IN_SERVICE VIC_REG(0x00E0)
#define VIC_IRQ_IN_STACK VIC_REG(0x00E4)
#define VIC_TEST_BUS_SEL VIC_REG(0x00E8)
#define VIC_VECTPRIORITY(n) VIC_REG(0x0200+((n) * 4))
#define VIC_VECTADDR(n) VIC_REG(0x0400+((n) * 4))
static void msm_irq_ack(unsigned int irq)
{
unsigned reg = VIC_INT_CLEAR0 + ((irq & 32) ? 4 : 0);
irq = 1 << (irq & 31);
writel(irq, reg);
}
static void msm_irq_mask(unsigned int irq)
{
unsigned reg = VIC_INT_ENCLEAR0 + ((irq & 32) ? 4 : 0);
writel(1 << (irq & 31), reg);
}
static void msm_irq_unmask(unsigned int irq)
{
unsigned reg = VIC_INT_ENSET0 + ((irq & 32) ? 4 : 0);
writel(1 << (irq & 31), reg);
}
static int msm_irq_set_wake(unsigned int irq, unsigned int on)
{
return -EINVAL;
}
static int msm_irq_set_type(unsigned int irq, unsigned int flow_type)
{
unsigned treg = VIC_INT_TYPE0 + ((irq & 32) ? 4 : 0);
unsigned preg = VIC_INT_POLARITY0 + ((irq & 32) ? 4 : 0);
int b = 1 << (irq & 31);
if (flow_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW))
writel(readl(preg) | b, preg);
if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
writel(readl(preg) & (~b), preg);
if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
writel(readl(treg) | b, treg);
set_irq_handler(irq, handle_edge_irq);
}
if (flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) {
writel(readl(treg) & (~b), treg);
set_irq_handler(irq, handle_level_irq);
}
return 0;
}
static struct irq_chip msm_irq_chip = {
.name = "msm",
.ack = msm_irq_ack,
.mask = msm_irq_mask,
.unmask = msm_irq_unmask,
.set_wake = msm_irq_set_wake,
.set_type = msm_irq_set_type,
};
void __init msm_init_irq(void)
{
unsigned n;
/* select level interrupts */
writel(0, VIC_INT_TYPE0);
writel(0, VIC_INT_TYPE1);
/* select highlevel interrupts */
writel(0, VIC_INT_POLARITY0);
writel(0, VIC_INT_POLARITY1);
/* select IRQ for all INTs */
writel(0, VIC_INT_SELECT0);
writel(0, VIC_INT_SELECT1);
/* disable all INTs */
writel(0, VIC_INT_EN0);
writel(0, VIC_INT_EN1);
/* don't use 1136 vic */
writel(0, VIC_CONFIG);
/* enable interrupt controller */
writel(1, VIC_INT_MASTEREN);
for (n = 0; n < NR_MSM_IRQS; n++) {
set_irq_chip(n, &msm_irq_chip);
set_irq_handler(n, handle_level_irq);
set_irq_flags(n, IRQF_VALID);
}
}
|
