150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/* linux/arch/arm/plat-s3c24xx/pm.c
|
|
*
|
|
* Copyright (c) 2004-2006 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* S3C24XX Power Manager (Suspend-To-RAM) support
|
|
*
|
|
* See Documentation/arm/Samsung-S3C24XX/Suspend.txt for more information
|
|
*
|
|
* 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
|
|
*
|
|
* Parts based on arch/arm/mach-pxa/pm.c
|
|
*
|
|
* Thanks to Dimitry Andric for debugging
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/time.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <plat/regs-serial.h>
|
|
#include <mach/regs-clock.h>
|
|
#include <mach/regs-gpio.h>
|
|
#include <mach/regs-mem.h>
|
|
#include <mach/regs-irq.h>
|
|
|
|
#include <asm/mach/time.h>
|
|
|
|
#include <plat/gpio-cfg.h>
|
|
#include <plat/pm.h>
|
|
|
|
#define PFX "s3c24xx-pm: "
|
|
|
|
static struct sleep_save core_save[] = {
|
|
SAVE_ITEM(S3C2410_LOCKTIME),
|
|
SAVE_ITEM(S3C2410_CLKCON),
|
|
|
|
/* we restore the timings here, with the proviso that the board
|
|
* brings the system up in an slower, or equal frequency setting
|
|
* to the original system.
|
|
*
|
|
* if we cannot guarantee this, then things are going to go very
|
|
* wrong here, as we modify the refresh and both pll settings.
|
|
*/
|
|
|
|
SAVE_ITEM(S3C2410_BWSCON),
|
|
SAVE_ITEM(S3C2410_BANKCON0),
|
|
SAVE_ITEM(S3C2410_BANKCON1),
|
|
SAVE_ITEM(S3C2410_BANKCON2),
|
|
SAVE_ITEM(S3C2410_BANKCON3),
|
|
SAVE_ITEM(S3C2410_BANKCON4),
|
|
SAVE_ITEM(S3C2410_BANKCON5),
|
|
|
|
#ifndef CONFIG_CPU_FREQ
|
|
SAVE_ITEM(S3C2410_CLKDIVN),
|
|
SAVE_ITEM(S3C2410_MPLLCON),
|
|
SAVE_ITEM(S3C2410_REFRESH),
|
|
#endif
|
|
SAVE_ITEM(S3C2410_UPLLCON),
|
|
SAVE_ITEM(S3C2410_CLKSLOW),
|
|
};
|
|
|
|
static struct sleep_save misc_save[] = {
|
|
SAVE_ITEM(S3C2410_DCLKCON),
|
|
};
|
|
|
|
/* s3c_pm_check_resume_pin
|
|
*
|
|
* check to see if the pin is configured correctly for sleep mode, and
|
|
* make any necessary adjustments if it is not
|
|
*/
|
|
|
|
static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
|
|
{
|
|
unsigned long irqstate;
|
|
unsigned long pinstate;
|
|
int irq = gpio_to_irq(pin);
|
|
|
|
if (irqoffs < 4)
|
|
irqstate = s3c_irqwake_intmask & (1L<<irqoffs);
|
|
else
|
|
irqstate = s3c_irqwake_eintmask & (1L<<irqoffs);
|
|
|
|
pinstate = s3c_gpio_getcfg(pin);
|
|
|
|
if (!irqstate) {
|
|
if (pinstate == S3C2410_GPIO_IRQ)
|
|
S3C_PMDBG("Leaving IRQ %d (pin %d) as is\n", irq, pin);
|
|
} else {
|
|
if (pinstate == S3C2410_GPIO_IRQ) {
|
|
S3C_PMDBG("Disabling IRQ %d (pin %d)\n", irq, pin);
|
|
s3c_gpio_cfgpin(pin, S3C2410_GPIO_INPUT);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* s3c_pm_configure_extint
|
|
*
|
|
* configure all external interrupt pins
|
|
*/
|
|
|
|
void s3c_pm_configure_extint(void)
|
|
{
|
|
int pin;
|
|
|
|
/* for each of the external interrupts (EINT0..EINT15) we
|
|
* need to check wether it is an external interrupt source,
|
|
* and then configure it as an input if it is not
|
|
*/
|
|
|
|
for (pin = S3C2410_GPF(0); pin <= S3C2410_GPF(7); pin++) {
|
|
s3c_pm_check_resume_pin(pin, pin - S3C2410_GPF(0));
|
|
}
|
|
|
|
for (pin = S3C2410_GPG(0); pin <= S3C2410_GPG(7); pin++) {
|
|
s3c_pm_check_resume_pin(pin, (pin - S3C2410_GPG(0))+8);
|
|
}
|
|
}
|
|
|
|
|
|
void s3c_pm_restore_core(void)
|
|
{
|
|
s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
|
|
s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
|
|
}
|
|
|
|
void s3c_pm_save_core(void)
|
|
{
|
|
s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
|
|
s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
|
|
}
|
|
|