155 lines
4.6 KiB
C
155 lines
4.6 KiB
C
/* 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 <asm/hardware.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#include <asm/arch/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);
|
|
}
|
|
}
|