1 /* linux/arch/arm/mach-msm/irq.c
3 * Copyright (C) 2007 Google, Inc.
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.
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.
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>
23 #include <linux/irq.h>
24 #include <mach/hardware.h>
28 #include <mach/msm_iomap.h>
30 #define VIC_REG(off) (MSM_VIC_BASE + (off))
32 #define VIC_INT_SELECT0 VIC_REG(0x0000) /* 1: FIQ, 0: IRQ */
33 #define VIC_INT_SELECT1 VIC_REG(0x0004) /* 1: FIQ, 0: IRQ */
34 #define VIC_INT_EN0 VIC_REG(0x0010)
35 #define VIC_INT_EN1 VIC_REG(0x0014)
36 #define VIC_INT_ENCLEAR0 VIC_REG(0x0020)
37 #define VIC_INT_ENCLEAR1 VIC_REG(0x0024)
38 #define VIC_INT_ENSET0 VIC_REG(0x0030)
39 #define VIC_INT_ENSET1 VIC_REG(0x0034)
40 #define VIC_INT_TYPE0 VIC_REG(0x0040) /* 1: EDGE, 0: LEVEL */
41 #define VIC_INT_TYPE1 VIC_REG(0x0044) /* 1: EDGE, 0: LEVEL */
42 #define VIC_INT_POLARITY0 VIC_REG(0x0050) /* 1: NEG, 0: POS */
43 #define VIC_INT_POLARITY1 VIC_REG(0x0054) /* 1: NEG, 0: POS */
44 #define VIC_NO_PEND_VAL VIC_REG(0x0060)
45 #define VIC_INT_MASTEREN VIC_REG(0x0064) /* 1: IRQ, 2: FIQ */
46 #define VIC_PROTECTION VIC_REG(0x006C) /* 1: ENABLE */
47 #define VIC_CONFIG VIC_REG(0x0068) /* 1: USE ARM1136 VIC */
48 #define VIC_IRQ_STATUS0 VIC_REG(0x0080)
49 #define VIC_IRQ_STATUS1 VIC_REG(0x0084)
50 #define VIC_FIQ_STATUS0 VIC_REG(0x0090)
51 #define VIC_FIQ_STATUS1 VIC_REG(0x0094)
52 #define VIC_RAW_STATUS0 VIC_REG(0x00A0)
53 #define VIC_RAW_STATUS1 VIC_REG(0x00A4)
54 #define VIC_INT_CLEAR0 VIC_REG(0x00B0)
55 #define VIC_INT_CLEAR1 VIC_REG(0x00B4)
56 #define VIC_SOFTINT0 VIC_REG(0x00C0)
57 #define VIC_SOFTINT1 VIC_REG(0x00C4)
58 #define VIC_IRQ_VEC_RD VIC_REG(0x00D0) /* pending int # */
59 #define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4) /* pending vector addr */
60 #define VIC_IRQ_VEC_WR VIC_REG(0x00D8)
61 #define VIC_IRQ_IN_SERVICE VIC_REG(0x00E0)
62 #define VIC_IRQ_IN_STACK VIC_REG(0x00E4)
63 #define VIC_TEST_BUS_SEL VIC_REG(0x00E8)
65 #define VIC_VECTPRIORITY(n) VIC_REG(0x0200+((n) * 4))
66 #define VIC_VECTADDR(n) VIC_REG(0x0400+((n) * 4))
68 static void msm_irq_ack(unsigned int irq)
70 unsigned reg = VIC_INT_CLEAR0 + ((irq & 32) ? 4 : 0);
71 irq = 1 << (irq & 31);
75 static void msm_irq_mask(unsigned int irq)
77 unsigned reg = VIC_INT_ENCLEAR0 + ((irq & 32) ? 4 : 0);
78 writel(1 << (irq & 31), reg);
81 static void msm_irq_unmask(unsigned int irq)
83 unsigned reg = VIC_INT_ENSET0 + ((irq & 32) ? 4 : 0);
84 writel(1 << (irq & 31), reg);
87 static int msm_irq_set_wake(unsigned int irq, unsigned int on)
92 static int msm_irq_set_type(unsigned int irq, unsigned int flow_type)
94 unsigned treg = VIC_INT_TYPE0 + ((irq & 32) ? 4 : 0);
95 unsigned preg = VIC_INT_POLARITY0 + ((irq & 32) ? 4 : 0);
96 int b = 1 << (irq & 31);
98 if (flow_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW))
99 writel(readl(preg) | b, preg);
100 if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
101 writel(readl(preg) & (~b), preg);
103 if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
104 writel(readl(treg) | b, treg);
105 set_irq_handler(irq, handle_edge_irq);
107 if (flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) {
108 writel(readl(treg) & (~b), treg);
109 set_irq_handler(irq, handle_level_irq);
114 static struct irq_chip msm_irq_chip = {
117 .mask = msm_irq_mask,
118 .unmask = msm_irq_unmask,
119 .set_wake = msm_irq_set_wake,
120 .set_type = msm_irq_set_type,
123 void __init msm_init_irq(void)
127 /* select level interrupts */
128 writel(0, VIC_INT_TYPE0);
129 writel(0, VIC_INT_TYPE1);
131 /* select highlevel interrupts */
132 writel(0, VIC_INT_POLARITY0);
133 writel(0, VIC_INT_POLARITY1);
135 /* select IRQ for all INTs */
136 writel(0, VIC_INT_SELECT0);
137 writel(0, VIC_INT_SELECT1);
139 /* disable all INTs */
140 writel(0, VIC_INT_EN0);
141 writel(0, VIC_INT_EN1);
143 /* don't use 1136 vic */
144 writel(0, VIC_CONFIG);
146 /* enable interrupt controller */
147 writel(1, VIC_INT_MASTEREN);
149 for (n = 0; n < NR_MSM_IRQS; n++) {
150 set_irq_chip(n, &msm_irq_chip);
151 set_irq_handler(n, handle_level_irq);
152 set_irq_flags(n, IRQF_VALID);