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[ARM] Separate VIC (vectored interrupt controller) support from Versatile 

Other machines may wish to make use of the VIC support code, so
move it to arch/arm/common.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2006-01-13 21:30:48 +00:00 committed by Russell King
parent 5ff3fd2716
commit fa0fe48fcc
8 changed files with 151 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/Kconfig
View File

@ -180,6 +180,7 @@ config ARCH_OMAP
config ARCH_VERSATILE
bool "Versatile"
select ARM_AMBA
select ARM_VIC
select ICST307
help
This enables support for ARM Ltd Versatile board.

7
arch/arm/common/Kconfig
View File

@ -1,7 +1,10 @@
config ICST525
config ARM_GIC
bool
config ARM_GIC
config ARM_VIC
bool
config ICST525
bool
config ICST307

1
arch/arm/common/Makefile
View File

@ -4,6 +4,7 @@
obj-y += rtctime.o
obj-$(CONFIG_ARM_GIC) += gic.o
obj-$(CONFIG_ARM_VIC) += vic.o
obj-$(CONFIG_ICST525) += icst525.o
obj-$(CONFIG_ICST307) += icst307.o
obj-$(CONFIG_SA1111) += sa1111.o

92
arch/arm/common/vic.c Normal file
View File

@ -0,0 +1,92 @@
/*
* linux/arch/arm/common/vic.c
*
* Copyright (C) 1999 - 2003 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/list.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/hardware/vic.h>
static void __iomem *vic_base;
static void vic_mask_irq(unsigned int irq)
{
irq -= IRQ_VIC_START;
writel(1 << irq, vic_base + VIC_INT_ENABLE_CLEAR);
}
static void vic_unmask_irq(unsigned int irq)
{
irq -= IRQ_VIC_START;
writel(1 << irq, vic_base + VIC_INT_ENABLE);
}
static struct irqchip vic_chip = {
.ack = vic_mask_irq,
.mask = vic_mask_irq,
.unmask = vic_unmask_irq,
};
void __init vic_init(void __iomem *base, u32 vic_sources)
{
unsigned int i;
vic_base = base;
/* Disable all interrupts initially. */
writel(0, vic_base + VIC_INT_SELECT);
writel(0, vic_base + VIC_INT_ENABLE);
writel(~0, vic_base + VIC_INT_ENABLE_CLEAR);
writel(0, vic_base + VIC_IRQ_STATUS);
writel(0, vic_base + VIC_ITCR);
writel(~0, vic_base + VIC_INT_SOFT_CLEAR);
/*
* Make sure we clear all existing interrupts
*/
writel(0, vic_base + VIC_VECT_ADDR);
for (i = 0; i < 19; i++) {
unsigned int value;
value = readl(vic_base + VIC_VECT_ADDR);
writel(value, vic_base + VIC_VECT_ADDR);
}
for (i = 0; i < 16; i++) {
void __iomem *reg = vic_base + VIC_VECT_CNTL0 + (i * 4);
writel(VIC_VECT_CNTL_ENABLE | i, reg);
}
writel(32, vic_base + VIC_DEF_VECT_ADDR);
for (i = 0; i < 32; i++) {
unsigned int irq = IRQ_VIC_START + i;
set_irq_chip(irq, &vic_chip);
if (vic_sources & (1 << i)) {
set_irq_handler(irq, do_level_IRQ);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
}
}

58
arch/arm/mach-versatile/core.c
View File

@ -35,6 +35,7 @@
#include <asm/leds.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/icst307.h>
#include <asm/hardware/vic.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
@ -56,24 +57,6 @@
#define VA_VIC_BASE __io_address(VERSATILE_VIC_BASE)
#define VA_SIC_BASE __io_address(VERSATILE_SIC_BASE)
static void vic_mask_irq(unsigned int irq)
{
irq -= IRQ_VIC_START;
writel(1 << irq, VA_VIC_BASE + VIC_IRQ_ENABLE_CLEAR);
}
static void vic_unmask_irq(unsigned int irq)
{
irq -= IRQ_VIC_START;
writel(1 << irq, VA_VIC_BASE + VIC_IRQ_ENABLE);
}
static struct irqchip vic_chip = {
.ack = vic_mask_irq,
.mask = vic_mask_irq,
.unmask = vic_unmask_irq,
};
static void sic_mask_irq(unsigned int irq)
{
irq -= IRQ_SIC_START;
@ -127,43 +110,12 @@ sic_handle_irq(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
void __init versatile_init_irq(void)
{
unsigned int i, value;
unsigned int i;
/* Disable all interrupts initially. */
writel(0, VA_VIC_BASE + VIC_INT_SELECT);
writel(0, VA_VIC_BASE + VIC_IRQ_ENABLE);
writel(~0, VA_VIC_BASE + VIC_IRQ_ENABLE_CLEAR);
writel(0, VA_VIC_BASE + VIC_IRQ_STATUS);
writel(0, VA_VIC_BASE + VIC_ITCR);
writel(~0, VA_VIC_BASE + VIC_IRQ_SOFT_CLEAR);
/*
* Make sure we clear all existing interrupts
*/
writel(0, VA_VIC_BASE + VIC_VECT_ADDR);
for (i = 0; i < 19; i++) {
value = readl(VA_VIC_BASE + VIC_VECT_ADDR);
writel(value, VA_VIC_BASE + VIC_VECT_ADDR);
}
for (i = 0; i < 16; i++) {
value = readl(VA_VIC_BASE + VIC_VECT_CNTL0 + (i * 4));
writel(value | VICVectCntl_Enable | i, VA_VIC_BASE + VIC_VECT_CNTL0 + (i * 4));
}
writel(32, VA_VIC_BASE + VIC_DEF_VECT_ADDR);
for (i = IRQ_VIC_START; i <= IRQ_VIC_END; i++) {
if (i != IRQ_VICSOURCE31) {
set_irq_chip(i, &vic_chip);
set_irq_handler(i, do_level_IRQ);
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
}
}
vic_init(VA_VIC_BASE, ~(1 << 31));
set_irq_handler(IRQ_VICSOURCE31, sic_handle_irq);
vic_unmask_irq(IRQ_VICSOURCE31);
enable_irq(IRQ_VICSOURCE31);
/* Do second interrupt controller */
writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
@ -877,7 +829,7 @@ static unsigned long versatile_gettimeoffset(void)
ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
do {
ticks1 = ticks2;
status = __raw_readl(VA_IC_BASE + VIC_IRQ_RAW_STATUS);
status = __raw_readl(VA_IC_BASE + VIC_RAW_STATUS);
ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
} while (ticks2 > ticks1);

1
include/asm-arm/arch-versatile/entry-macro.S
View File

@ -8,6 +8,7 @@
* warranty of any kind, whether express or implied.
*/
#include <asm/hardware.h>
#include <asm/hardware/vic.h>
.macro disable_fiq
.endm

23
include/asm-arm/arch-versatile/platform.h
View File

@ -293,26 +293,7 @@
* VERSATILE_SYS_IC
*
*/
#define VIC_IRQ_STATUS 0
#define VIC_FIQ_STATUS 0x04
#define VIC_IRQ_RAW_STATUS 0x08
#define VIC_INT_SELECT 0x0C /* 1 = FIQ, 0 = IRQ */
#define VIC_IRQ_ENABLE 0x10 /* 1 = enable, 0 = disable */
#define VIC_IRQ_ENABLE_CLEAR 0x14
#define VIC_IRQ_SOFT 0x18
#define VIC_IRQ_SOFT_CLEAR 0x1C
#define VIC_PROTECT 0x20
#define VIC_VECT_ADDR 0x30
#define VIC_DEF_VECT_ADDR 0x34
#define VIC_VECT_ADDR0 0x100 /* 0 to 15 */
#define VIC_VECT_CNTL0 0x200 /* 0 to 15 */
#define VIC_ITCR 0x300 /* VIC test control register */
#define VIC_FIQ_RAW_STATUS 0x08
#define VIC_FIQ_ENABLE 0x10 /* 1 = enable, 0 = disable */
#define VIC_FIQ_ENABLE_CLEAR 0x14
#define VIC_FIQ_SOFT 0x18
#define VIC_FIQ_SOFT_CLEAR 0x1C
/* VIC definitions in include/asm-arm/hardware/vic.h */
#define SIC_IRQ_STATUS 0
#define SIC_IRQ_RAW_STATUS 0x04
@ -325,8 +306,6 @@
#define SIC_INT_PIC_ENABLES 0x20 /* set interrupt pass through bits */
#define SIC_INT_PIC_ENABLEC 0x24 /* Clear interrupt pass through bits */
#define VICVectCntl_Enable (1 << 5)
/* ------------------------------------------------------------------------
* Interrupts - bit assignment (primary)
* ------------------------------------------------------------------------

45
include/asm-arm/hardware/vic.h Normal file
View File

@ -0,0 +1,45 @@
/*
* linux/include/asm-arm/hardware/vic.h
*
* Copyright (c) ARM Limited 2003. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ASM_ARM_HARDWARE_VIC_H
#define __ASM_ARM_HARDWARE_VIC_H
#define VIC_IRQ_STATUS 0x00
#define VIC_FIQ_STATUS 0x04
#define VIC_RAW_STATUS 0x08
#define VIC_INT_SELECT 0x0c /* 1 = FIQ, 0 = IRQ */
#define VIC_INT_ENABLE 0x10 /* 1 = enable, 0 = disable */
#define VIC_INT_ENABLE_CLEAR 0x14
#define VIC_INT_SOFT 0x18
#define VIC_INT_SOFT_CLEAR 0x1c
#define VIC_PROTECT 0x20
#define VIC_VECT_ADDR 0x30
#define VIC_DEF_VECT_ADDR 0x34
#define VIC_VECT_ADDR0 0x100 /* 0 to 15 */
#define VIC_VECT_CNTL0 0x200 /* 0 to 15 */
#define VIC_ITCR 0x300 /* VIC test control register */
#define VIC_VECT_CNTL_ENABLE (1 << 5)
#ifndef __ASSEMBLY__
void vic_init(void __iomem *base, u32 vic_sources);
#endif
#endif