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Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -08001/* linux/arch/arm/mach-msm/irq.c
2 *
3 * Copyright (C) 2007 Google, Inc.
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16#include <linux/init.h>
17#include <linux/module.h>
18#include <linux/sched.h>
19#include <linux/interrupt.h>
20#include <linux/ptrace.h>
21#include <linux/timer.h>
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080022#include <linux/irq.h>
Russell Kingfced80c2008-09-06 12:10:45 +010023#include <linux/io.h>
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080024
Russell Kingfced80c2008-09-06 12:10:45 +010025#include <mach/hardware.h>
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080026
Russell Kinga09e64f2008-08-05 16:14:15 +010027#include <mach/msm_iomap.h>
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080028
29#define VIC_REG(off) (MSM_VIC_BASE + (off))
30
31#define VIC_INT_SELECT0 VIC_REG(0x0000) /* 1: FIQ, 0: IRQ */
32#define VIC_INT_SELECT1 VIC_REG(0x0004) /* 1: FIQ, 0: IRQ */
33#define VIC_INT_EN0 VIC_REG(0x0010)
34#define VIC_INT_EN1 VIC_REG(0x0014)
35#define VIC_INT_ENCLEAR0 VIC_REG(0x0020)
36#define VIC_INT_ENCLEAR1 VIC_REG(0x0024)
37#define VIC_INT_ENSET0 VIC_REG(0x0030)
38#define VIC_INT_ENSET1 VIC_REG(0x0034)
39#define VIC_INT_TYPE0 VIC_REG(0x0040) /* 1: EDGE, 0: LEVEL */
40#define VIC_INT_TYPE1 VIC_REG(0x0044) /* 1: EDGE, 0: LEVEL */
41#define VIC_INT_POLARITY0 VIC_REG(0x0050) /* 1: NEG, 0: POS */
42#define VIC_INT_POLARITY1 VIC_REG(0x0054) /* 1: NEG, 0: POS */
43#define VIC_NO_PEND_VAL VIC_REG(0x0060)
44#define VIC_INT_MASTEREN VIC_REG(0x0064) /* 1: IRQ, 2: FIQ */
45#define VIC_PROTECTION VIC_REG(0x006C) /* 1: ENABLE */
46#define VIC_CONFIG VIC_REG(0x0068) /* 1: USE ARM1136 VIC */
47#define VIC_IRQ_STATUS0 VIC_REG(0x0080)
48#define VIC_IRQ_STATUS1 VIC_REG(0x0084)
49#define VIC_FIQ_STATUS0 VIC_REG(0x0090)
50#define VIC_FIQ_STATUS1 VIC_REG(0x0094)
51#define VIC_RAW_STATUS0 VIC_REG(0x00A0)
52#define VIC_RAW_STATUS1 VIC_REG(0x00A4)
53#define VIC_INT_CLEAR0 VIC_REG(0x00B0)
54#define VIC_INT_CLEAR1 VIC_REG(0x00B4)
55#define VIC_SOFTINT0 VIC_REG(0x00C0)
56#define VIC_SOFTINT1 VIC_REG(0x00C4)
57#define VIC_IRQ_VEC_RD VIC_REG(0x00D0) /* pending int # */
58#define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4) /* pending vector addr */
59#define VIC_IRQ_VEC_WR VIC_REG(0x00D8)
60#define VIC_IRQ_IN_SERVICE VIC_REG(0x00E0)
61#define VIC_IRQ_IN_STACK VIC_REG(0x00E4)
62#define VIC_TEST_BUS_SEL VIC_REG(0x00E8)
63
64#define VIC_VECTPRIORITY(n) VIC_REG(0x0200+((n) * 4))
65#define VIC_VECTADDR(n) VIC_REG(0x0400+((n) * 4))
66
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010067static void msm_irq_ack(struct irq_data *d)
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080068{
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010069 void __iomem *reg = VIC_INT_CLEAR0 + ((d->irq & 32) ? 4 : 0);
70 writel(1 << (d->irq & 31), reg);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080071}
72
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010073static void msm_irq_mask(struct irq_data *d)
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080074{
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010075 void __iomem *reg = VIC_INT_ENCLEAR0 + ((d->irq & 32) ? 4 : 0);
76 writel(1 << (d->irq & 31), reg);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080077}
78
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010079static void msm_irq_unmask(struct irq_data *d)
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080080{
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010081 void __iomem *reg = VIC_INT_ENSET0 + ((d->irq & 32) ? 4 : 0);
82 writel(1 << (d->irq & 31), reg);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080083}
84
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010085static int msm_irq_set_wake(struct irq_data *d, unsigned int on)
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080086{
87 return -EINVAL;
88}
89
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010090static int msm_irq_set_type(struct irq_data *d, unsigned int flow_type)
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080091{
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +010092 void __iomem *treg = VIC_INT_TYPE0 + ((d->irq & 32) ? 4 : 0);
93 void __iomem *preg = VIC_INT_POLARITY0 + ((d->irq & 32) ? 4 : 0);
94 int b = 1 << (d->irq & 31);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -080095
96 if (flow_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW))
97 writel(readl(preg) | b, preg);
98 if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
99 writel(readl(preg) & (~b), preg);
100
101 if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
102 writel(readl(treg) | b, treg);
Thomas Gleixner70c4fa22011-03-24 12:41:27 +0100103 __irq_set_handler_locked(d->irq, handle_edge_irq);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -0800104 }
105 if (flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) {
106 writel(readl(treg) & (~b), treg);
Thomas Gleixner70c4fa22011-03-24 12:41:27 +0100107 __irq_set_handler_locked(d->irq, handle_level_irq);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -0800108 }
109 return 0;
110}
111
112static struct irq_chip msm_irq_chip = {
Lennert Buytenhek0f86ee02010-11-29 10:37:34 +0100113 .name = "msm",
114 .irq_ack = msm_irq_ack,
115 .irq_mask = msm_irq_mask,
116 .irq_unmask = msm_irq_unmask,
117 .irq_set_wake = msm_irq_set_wake,
118 .irq_set_type = msm_irq_set_type,
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -0800119};
120
121void __init msm_init_irq(void)
122{
123 unsigned n;
124
125 /* select level interrupts */
126 writel(0, VIC_INT_TYPE0);
127 writel(0, VIC_INT_TYPE1);
128
129 /* select highlevel interrupts */
130 writel(0, VIC_INT_POLARITY0);
131 writel(0, VIC_INT_POLARITY1);
132
133 /* select IRQ for all INTs */
134 writel(0, VIC_INT_SELECT0);
135 writel(0, VIC_INT_SELECT1);
136
137 /* disable all INTs */
138 writel(0, VIC_INT_EN0);
139 writel(0, VIC_INT_EN1);
140
141 /* don't use 1136 vic */
142 writel(0, VIC_CONFIG);
143
144 /* enable interrupt controller */
145 writel(1, VIC_INT_MASTEREN);
146
147 for (n = 0; n < NR_MSM_IRQS; n++) {
Thomas Gleixnerf38c02f2011-03-24 13:35:09 +0100148 irq_set_chip_and_handler(n, &msm_irq_chip, handle_level_irq);
Arve Hjønnevåg3e4ea372007-11-26 04:11:58 -0800149 set_irq_flags(n, IRQF_VALID);
150 }
151}