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/*
* Suspend-to-RAM - PPC code
*
* Copyright 2006 Tim Dijkstra <newsuser@fa...>
* Copyright 2006 Luca Tettamanti <kronos.it@gm...>
* Distribute under GPLv2.
*/
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/pmu.h>
#include "s2ram.h"
void s2ram_add_flag(int opt, const char *arg)
{
/* We don't take any options */
}
int s2ram_prepare(void)
{
return 0;
}
void s2ram_resume(void)
{
/* nop */
}
void identify_machine(void)
{
printf("We don't have quirks and hence no whitelist on powerpc\n");
}
int machine_known(void)
{
printf("We don't have quirks and hence no whitelist on powerpc\n");
return 0;
}
int s2ram_hacks(void)
{
return 0;
}
int s2ram_is_supported(void)
{
int fd, ret = 0;
unsigned long arg = 0;
/* PMU_IOC_CAN_SLEEP is going away, so we only say unsupported
* if PMU_IOC_CAN_SLEEP explicitly says we can't */
fd = open("/dev/pmu", O_RDWR);
if (fd < 0)
return 0;
ret = ioctl(fd, PMU_IOC_CAN_SLEEP, &arg);
if (!ret && arg != 1)
ret = ENOTSUP;
close(fd);
return 0;
}
static int s2ram_do_pmu (void)
{
int fd;
int ret = 0;
unsigned long arg = 0;
fd = open("/dev/pmu", O_RDWR);
if (fd < 0)
return errno;
ret = ioctl(fd, PMU_IOC_CAN_SLEEP, &arg);
if (!ret && arg != 1)
ret = ENOTSUP;
if (!ret)
ret = ioctl(fd, PMU_IOC_SLEEP, 0);
if (ret)
ret = errno;
close(fd);
return ret;
}
int s2ram_do(void)
{
int ret;
/* If this works we're done. Else we just continue as if nothing
* happened, future kernels will work with /s/p/s.
*/
ret = s2ram_do_pmu();
if (!ret)
return ret;
return s2ram_generic_do();
}
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