forked from Minki/linux
ec976d6eb0
Move all the gpio functions out of <mach/hardware.h> as this file is for defining the generic IO base addresses for the kernel IO calls. Make a new header <mach/gpio-fns.h> to take this and include it via the chain from <linux/gpio.h> which is what most of these files should be using (and will be changed as soon as possible). Note, this does make minor changes to some drivers but should not mess up any pending merges. CC: Richard Purdie <rpurdie@rpsys.net> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> CC: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/* linux/arch/arm/mach-s3c2410/pm.c
|
|
*
|
|
* Copyright (c) 2006 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support
|
|
*
|
|
* 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/suspend.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/time.h>
|
|
#include <linux/sysdev.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/hardware.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
|
|
#include <mach/regs-gpio.h>
|
|
#include <mach/h1940.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/pm.h>
|
|
|
|
static void s3c2410_pm_prepare(void)
|
|
{
|
|
/* ensure at least GSTATUS3 has the resume address */
|
|
|
|
__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3);
|
|
|
|
S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
|
|
S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
|
|
|
|
if (machine_is_h1940()) {
|
|
void *base = phys_to_virt(H1940_SUSPEND_CHECK);
|
|
unsigned long ptr;
|
|
unsigned long calc = 0;
|
|
|
|
/* generate check for the bootloader to check on resume */
|
|
|
|
for (ptr = 0; ptr < 0x40000; ptr += 0x400)
|
|
calc += __raw_readl(base+ptr);
|
|
|
|
__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
|
|
}
|
|
|
|
/* the RX3715 uses similar code and the same H1940 and the
|
|
* same offsets for resume and checksum pointers */
|
|
|
|
if (machine_is_rx3715()) {
|
|
void *base = phys_to_virt(H1940_SUSPEND_CHECK);
|
|
unsigned long ptr;
|
|
unsigned long calc = 0;
|
|
|
|
/* generate check for the bootloader to check on resume */
|
|
|
|
for (ptr = 0; ptr < 0x40000; ptr += 0x4)
|
|
calc += __raw_readl(base+ptr);
|
|
|
|
__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
|
|
}
|
|
|
|
if ( machine_is_aml_m5900() )
|
|
s3c2410_gpio_setpin(S3C2410_GPF2, 1);
|
|
|
|
}
|
|
|
|
static int s3c2410_pm_resume(struct sys_device *dev)
|
|
{
|
|
unsigned long tmp;
|
|
|
|
/* unset the return-from-sleep flag, to ensure reset */
|
|
|
|
tmp = __raw_readl(S3C2410_GSTATUS2);
|
|
tmp &= S3C2410_GSTATUS2_OFFRESET;
|
|
__raw_writel(tmp, S3C2410_GSTATUS2);
|
|
|
|
if ( machine_is_aml_m5900() )
|
|
s3c2410_gpio_setpin(S3C2410_GPF2, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2410_pm_add(struct sys_device *dev)
|
|
{
|
|
pm_cpu_prep = s3c2410_pm_prepare;
|
|
pm_cpu_sleep = s3c2410_cpu_suspend;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_CPU_S3C2410)
|
|
static struct sysdev_driver s3c2410_pm_driver = {
|
|
.add = s3c2410_pm_add,
|
|
.resume = s3c2410_pm_resume,
|
|
};
|
|
|
|
/* register ourselves */
|
|
|
|
static int __init s3c2410_pm_drvinit(void)
|
|
{
|
|
return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_pm_driver);
|
|
}
|
|
|
|
arch_initcall(s3c2410_pm_drvinit);
|
|
#endif
|
|
|
|
#if defined(CONFIG_CPU_S3C2440)
|
|
static struct sysdev_driver s3c2440_pm_driver = {
|
|
.add = s3c2410_pm_add,
|
|
.resume = s3c2410_pm_resume,
|
|
};
|
|
|
|
static int __init s3c2440_pm_drvinit(void)
|
|
{
|
|
return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_pm_driver);
|
|
}
|
|
|
|
arch_initcall(s3c2440_pm_drvinit);
|
|
#endif
|
|
|
|
#if defined(CONFIG_CPU_S3C2442)
|
|
static struct sysdev_driver s3c2442_pm_driver = {
|
|
.add = s3c2410_pm_add,
|
|
.resume = s3c2410_pm_resume,
|
|
};
|
|
|
|
static int __init s3c2442_pm_drvinit(void)
|
|
{
|
|
return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_pm_driver);
|
|
}
|
|
|
|
arch_initcall(s3c2442_pm_drvinit);
|
|
#endif
|