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linux/arch/arm/mach-s3c2416/irq.c
Rafael J. Wysocki bb072c3cf2 ARM / Samsung: Use struct syscore_ops for "core" power management 
Replace sysdev classes and struct sys_device objects used for "core"
power management by Samsung platforms with struct syscore_ops objects
that are simpler.

This generally reduces the code size and the kernel memory footprint.
It also is necessary for removing sysdevs entirely from the kernel in
the future.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
2011-04-24 19:16:10 +02:00

248 lines
6.2 KiB
C
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/* linux/arch/arm/mach-s3c2416/irq.c
*
* Copyright (c) 2009 Yauhen Kharuzhy <jekhor@gmail.com>,
* as part of OpenInkpot project
* Copyright (c) 2009 Promwad Innovation Company
* Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
*
* 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/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/regs-irq.h>
#include <mach/regs-gpio.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/irq.h>
#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)
static inline void s3c2416_irq_demux(unsigned int irq, unsigned int len)
{
unsigned int subsrc, submsk;
unsigned int end;
/* read the current pending interrupts, and the mask
* for what it is available */
subsrc = __raw_readl(S3C2410_SUBSRCPND);
submsk = __raw_readl(S3C2410_INTSUBMSK);
subsrc &= ~submsk;
subsrc >>= (irq - S3C2410_IRQSUB(0));
subsrc &= (1 << len)-1;
end = len + irq;
for (; irq < end && subsrc; irq++) {
if (subsrc & 1)
generic_handle_irq(irq);
subsrc >>= 1;
}
}
/* WDT/AC97 sub interrupts */
static void s3c2416_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)
{
s3c2416_irq_demux(IRQ_S3C2443_WDT, 4);
}
#define INTMSK_WDTAC97 (1UL << (IRQ_WDT - IRQ_EINT0))
#define SUBMSK_WDTAC97 INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)
static void s3c2416_irq_wdtac97_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
}
static void s3c2416_irq_wdtac97_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_WDTAC97);
}
static void s3c2416_irq_wdtac97_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
}
static struct irq_chip s3c2416_irq_wdtac97 = {
.irq_mask = s3c2416_irq_wdtac97_mask,
.irq_unmask = s3c2416_irq_wdtac97_unmask,
.irq_ack = s3c2416_irq_wdtac97_ack,
};
/* LCD sub interrupts */
static void s3c2416_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)
{
s3c2416_irq_demux(IRQ_S3C2443_LCD1, 4);
}
#define INTMSK_LCD (1UL << (IRQ_LCD - IRQ_EINT0))
#define SUBMSK_LCD INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)
static void s3c2416_irq_lcd_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_LCD, SUBMSK_LCD);
}
static void s3c2416_irq_lcd_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_LCD);
}
static void s3c2416_irq_lcd_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_LCD, SUBMSK_LCD);
}
static struct irq_chip s3c2416_irq_lcd = {
.irq_mask = s3c2416_irq_lcd_mask,
.irq_unmask = s3c2416_irq_lcd_unmask,
.irq_ack = s3c2416_irq_lcd_ack,
};
/* DMA sub interrupts */
static void s3c2416_irq_demux_dma(unsigned int irq, struct irq_desc *desc)
{
s3c2416_irq_demux(IRQ_S3C2443_DMA0, 6);
}
#define INTMSK_DMA (1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))
#define SUBMSK_DMA INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)
static void s3c2416_irq_dma_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_DMA, SUBMSK_DMA);
}
static void s3c2416_irq_dma_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_DMA);
}
static void s3c2416_irq_dma_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_DMA, SUBMSK_DMA);
}
static struct irq_chip s3c2416_irq_dma = {
.irq_mask = s3c2416_irq_dma_mask,
.irq_unmask = s3c2416_irq_dma_unmask,
.irq_ack = s3c2416_irq_dma_ack,
};
/* UART3 sub interrupts */
static void s3c2416_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)
{
s3c2416_irq_demux(IRQ_S3C2443_RX3, 3);
}
#define INTMSK_UART3 (1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))
#define SUBMSK_UART3 (0x7 << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))
static void s3c2416_irq_uart3_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_UART3, SUBMSK_UART3);
}
static void s3c2416_irq_uart3_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_UART3);
}
static void s3c2416_irq_uart3_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_UART3, SUBMSK_UART3);
}
static struct irq_chip s3c2416_irq_uart3 = {
.irq_mask = s3c2416_irq_uart3_mask,
.irq_unmask = s3c2416_irq_uart3_unmask,
.irq_ack = s3c2416_irq_uart3_ack,
};
/* IRQ initialisation code */
static int __init s3c2416_add_sub(unsigned int base,
void (*demux)(unsigned int,
struct irq_desc *),
struct irq_chip *chip,
unsigned int start, unsigned int end)
{
unsigned int irqno;
irq_set_chip_and_handler(base, &s3c_irq_level_chip, handle_level_irq);
irq_set_chained_handler(base, demux);
for (irqno = start; irqno <= end; irqno++) {
irq_set_chip_and_handler(irqno, chip, handle_level_irq);
set_irq_flags(irqno, IRQF_VALID);
}
return 0;
}
static int __init s3c2416_irq_add(struct sys_device *sysdev)
{
printk(KERN_INFO "S3C2416: IRQ Support\n");
s3c2416_add_sub(IRQ_LCD, s3c2416_irq_demux_lcd, &s3c2416_irq_lcd,
IRQ_S3C2443_LCD2, IRQ_S3C2443_LCD4);
s3c2416_add_sub(IRQ_S3C2443_DMA, s3c2416_irq_demux_dma,
&s3c2416_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);
s3c2416_add_sub(IRQ_S3C2443_UART3, s3c2416_irq_demux_uart3,
&s3c2416_irq_uart3,
IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);
s3c2416_add_sub(IRQ_WDT, s3c2416_irq_demux_wdtac97,
&s3c2416_irq_wdtac97,
IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);
return 0;
}
static struct sysdev_driver s3c2416_irq_driver = {
.add = s3c2416_irq_add,
};
static int __init s3c2416_irq_init(void)
{
return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_irq_driver);
}
arch_initcall(s3c2416_irq_init);
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