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
|
/*
* linux/arch/arm/mach-mmp/irq-mmp2.c
*
* Generic IRQ handling, GPIO IRQ demultiplexing, etc.
*
* Author: Haojian Zhuang <haojian.zhuang@marvell.com>
* Copyright: Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/regs-icu.h>
#include "common.h"
static void icu_mask_irq(unsigned int irq)
{
uint32_t r = __raw_readl(ICU_INT_CONF(irq));
r &= ~ICU_INT_ROUTE_PJ4_IRQ;
__raw_writel(r, ICU_INT_CONF(irq));
}
static void icu_unmask_irq(unsigned int irq)
{
uint32_t r = __raw_readl(ICU_INT_CONF(irq));
r |= ICU_INT_ROUTE_PJ4_IRQ;
__raw_writel(r, ICU_INT_CONF(irq));
}
static struct irq_chip icu_irq_chip = {
.name = "icu_irq",
.mask_ack = icu_mask_irq,
.unmask = icu_unmask_irq,
};
#define SECOND_IRQ_MASK(_name_, irq_base, prefix) \
static void _name_##_mask_irq(unsigned int irq) \
{ \
uint32_t r; \
r = __raw_readl(prefix##_MASK) | (1 << (irq - irq_base)); \
__raw_writel(r, prefix##_MASK); \
}
#define SECOND_IRQ_UNMASK(_name_, irq_base, prefix) \
static void _name_##_unmask_irq(unsigned int irq) \
{ \
uint32_t r; \
r = __raw_readl(prefix##_MASK) & ~(1 << (irq - irq_base)); \
__raw_writel(r, prefix##_MASK); \
}
#define SECOND_IRQ_DEMUX(_name_, irq_base, prefix) \
static void _name_##_irq_demux(unsigned int irq, struct irq_desc *desc) \
{ \
unsigned long status, mask, n; \
mask = __raw_readl(prefix##_MASK); \
while (1) { \
status = __raw_readl(prefix##_STATUS) & ~mask; \
if (status == 0) \
break; \
n = find_first_bit(&status, BITS_PER_LONG); \
while (n < BITS_PER_LONG) { \
generic_handle_irq(irq_base + n); \
n = find_next_bit(&status, BITS_PER_LONG, n+1); \
} \
} \
}
#define SECOND_IRQ_CHIP(_name_, irq_base, prefix) \
SECOND_IRQ_MASK(_name_, irq_base, prefix) \
SECOND_IRQ_UNMASK(_name_, irq_base, prefix) \
SECOND_IRQ_DEMUX(_name_, irq_base, prefix) \
static struct irq_chip _name_##_irq_chip = { \
.name = #_name_, \
.mask_ack = _name_##_mask_irq, \
.unmask = _name_##_unmask_irq, \
}
SECOND_IRQ_CHIP(pmic, IRQ_MMP2_PMIC_BASE, MMP2_ICU_INT4);
SECOND_IRQ_CHIP(rtc, IRQ_MMP2_RTC_BASE, MMP2_ICU_INT5);
SECOND_IRQ_CHIP(twsi, IRQ_MMP2_TWSI_BASE, MMP2_ICU_INT17);
SECOND_IRQ_CHIP(misc, IRQ_MMP2_MISC_BASE, MMP2_ICU_INT35);
SECOND_IRQ_CHIP(ssp, IRQ_MMP2_SSP_BASE, MMP2_ICU_INT51);
static void init_mux_irq(struct irq_chip *chip, int start, int num)
{
int irq;
for (irq = start; num > 0; irq++, num--) {
chip->mask_ack(irq);
set_irq_chip(irq, chip);
set_irq_flags(irq, IRQF_VALID);
set_irq_handler(irq, handle_level_irq);
}
}
void __init mmp2_init_irq(void)
{
int irq;
for (irq = 0; irq < IRQ_MMP2_MUX_BASE; irq++) {
icu_mask_irq(irq);
set_irq_chip(irq, &icu_irq_chip);
set_irq_flags(irq, IRQF_VALID);
switch (irq) {
case IRQ_MMP2_PMIC_MUX:
case IRQ_MMP2_RTC_MUX:
case IRQ_MMP2_TWSI_MUX:
case IRQ_MMP2_MISC_MUX:
case IRQ_MMP2_SSP_MUX:
break;
default:
set_irq_handler(irq, handle_level_irq);
break;
}
}
init_mux_irq(&pmic_irq_chip, IRQ_MMP2_PMIC_BASE, 2);
init_mux_irq(&rtc_irq_chip, IRQ_MMP2_RTC_BASE, 2);
init_mux_irq(&twsi_irq_chip, IRQ_MMP2_TWSI_BASE, 5);
init_mux_irq(&misc_irq_chip, IRQ_MMP2_MISC_BASE, 15);
init_mux_irq(&ssp_irq_chip, IRQ_MMP2_SSP_BASE, 2);
set_irq_chained_handler(IRQ_MMP2_PMIC_MUX, pmic_irq_demux);
set_irq_chained_handler(IRQ_MMP2_RTC_MUX, rtc_irq_demux);
set_irq_chained_handler(IRQ_MMP2_TWSI_MUX, twsi_irq_demux);
set_irq_chained_handler(IRQ_MMP2_MISC_MUX, misc_irq_demux);
set_irq_chained_handler(IRQ_MMP2_SSP_MUX, ssp_irq_demux);
}
|
