mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Arnd Bergmann](/assets/img/avatar_default.png)
BAST is the one machine that theoretically supports unmodified ISA drivers for hardware on its PC/104 connector, using a custom version of the inb()/outb() and inw()/outw() macros. This is incompatible with the generic version used in asm/io.h, and can't easily be used in a multiplatform kernel. Removing the special case for 16-bit I/O port access on BAST gets us closer to multiplatform, at the expense of any PC/104 users with 16-bit cards having to either use an older kernel or modify their ISA drivers to manually ioremap() the area and use readw()/write() in place of inw()/outw(). Either way is probably ok, given that there is a recurring discussion about dropping s3c24xx altogether, and many traditional ISA drivers are already gone. Machines other than BAST already have no support for ISA drivers, though a couple of them do map one of the external chip-selects into the ISA port range, using the same address for 8-bit and 16-bit I/O. It is unlikely that anything actually uses this mapping, but it's also easy to keep this working by mapping it to the normal platform-independent PCI I/O base that is otherwise unused on s3c24xx. The mach/map-base.h file is no longer referenced in global headers and can be moved into the platform directory. Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright (c) 2003-2004 Simtec Electronics
|
|
// Ben Dooks <ben@simtec.co.uk>
|
|
// http://armlinux.simtec.co.uk/
|
|
//
|
|
// S3C24XX - IRQ PM code
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "cpu.h"
|
|
#include "pm.h"
|
|
#include "map-base.h"
|
|
#include "map-s3c.h"
|
|
|
|
#include "regs-irq.h"
|
|
#include "regs-gpio.h"
|
|
#include "pm-core.h"
|
|
|
|
#include <asm/irq.h>
|
|
|
|
int s3c_irq_wake(struct irq_data *data, unsigned int state)
|
|
{
|
|
unsigned long irqbit = 1 << data->hwirq;
|
|
|
|
if (!(s3c_irqwake_intallow & irqbit))
|
|
return -ENOENT;
|
|
|
|
pr_info("wake %s for hwirq %lu\n",
|
|
state ? "enabled" : "disabled", data->hwirq);
|
|
|
|
if (!state)
|
|
s3c_irqwake_intmask |= irqbit;
|
|
else
|
|
s3c_irqwake_intmask &= ~irqbit;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sleep_save irq_save[] = {
|
|
SAVE_ITEM(S3C2410_INTMSK),
|
|
SAVE_ITEM(S3C2410_INTSUBMSK),
|
|
};
|
|
|
|
/* the extint values move between the s3c2410/s3c2440 and the s3c2412
|
|
* so we use an array to hold them, and to calculate the address of
|
|
* the register at run-time
|
|
*/
|
|
|
|
static unsigned long save_extint[3];
|
|
static unsigned long save_eintflt[4];
|
|
static unsigned long save_eintmask;
|
|
|
|
static int s3c24xx_irq_suspend(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(save_extint); i++)
|
|
save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
|
|
save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
|
|
|
|
s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
|
|
save_eintmask = __raw_readl(S3C24XX_EINTMASK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void s3c24xx_irq_resume(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(save_extint); i++)
|
|
__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
|
|
__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
|
|
|
|
s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
|
|
__raw_writel(save_eintmask, S3C24XX_EINTMASK);
|
|
}
|
|
|
|
struct syscore_ops s3c24xx_irq_syscore_ops = {
|
|
.suspend = s3c24xx_irq_suspend,
|
|
.resume = s3c24xx_irq_resume,
|
|
};
|
|
|
|
#ifdef CONFIG_CPU_S3C2416
|
|
static struct sleep_save s3c2416_irq_save[] = {
|
|
SAVE_ITEM(S3C2416_INTMSK2),
|
|
};
|
|
|
|
static int s3c2416_irq_suspend(void)
|
|
{
|
|
s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void s3c2416_irq_resume(void)
|
|
{
|
|
s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
|
|
}
|
|
|
|
struct syscore_ops s3c2416_irq_syscore_ops = {
|
|
.suspend = s3c2416_irq_suspend,
|
|
.resume = s3c2416_irq_resume,
|
|
};
|
|
#endif
|