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/*
* Suspend-to-RAM
*
* Copyright 2006 Pavel Machek <pavel@suse.cz>
* Copyright 2011 Rodolfo García Peñas (kix) <kix@kix.es>
* Distribute under GPLv2.
*/
#include <ctype.h>
#include "config.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#ifndef S2RAM
#define S2RAM
#endif
#include "vt.h"
#include "s2ram.h"
#include "config_parser.h"
static char s2ram_force;
static char s2ram_quirks[MAX_STR_LEN];
static struct config_par s2ram_parameters[] = {
{
.name = "s2ram_force",
.fmt = "%c",
.ptr = &s2ram_force,
},
{
.name = "s2ram_quirks",
.fmt = "%s",
.ptr = s2ram_quirks,
.len = MAX_STR_LEN
},
{
.name = NULL,
.fmt = NULL,
.ptr = NULL,
.len = 0,
}
};
int s2ram_check_kms(void)
{
DIR *sysfs_dir;
struct dirent *dentry;
int ret = -ENOENT;
sysfs_dir = opendir("/sys/class/drm");
if (!sysfs_dir)
return errno;
while ((dentry = readdir(sysfs_dir))) {
if (!strncmp(dentry->d_name, "card0-", 6)) {
ret = 0;
break;
}
}
closedir(sysfs_dir);
return ret;
}
/* Actually enter the suspend. May be ran on frozen system. */
int s2ram_generic_do(void)
{
int ret = 0;
FILE *f = fopen("/sys/power/state", "w");
if (!f) {
printf("/sys/power/state does not exist; what kind of ninja mutant machine is this?\n");
return ENODEV;
}
if (fprintf(f, "mem") < 0) {
ret = errno;
perror("s2ram_do");
}
/* usually only fclose fails, not fprintf, so it does not matter
* that we might overwrite the previous error.
*/
if (fclose(f) < 0) {
ret = errno;
perror("s2ram_do");
}
return ret;
}
/* Parse the configuration file */
int get_s2ram_config(void)
{
int error;
char *conf_name = CONFIG_FILE;
struct stat stat_buf;
char *ret_name = NULL;
if (stat(conf_name, &stat_buf)) {
fprintf(stderr, "%s: Could not stat configuration file\n", conf_name);
return -ENOENT;
} else {
error = parse(ret_name, conf_name, s2ram_parameters);
if (error) {
fprintf(stderr, "%s: Could not parse config file\n", ret_name);
return error;
}
if (s2ram_force == 'y') {
force = 1;
if (strlen(s2ram_quirks) != 0) {
printf("Using s2ram_quirks %s\n", s2ram_quirks);
s2ram_add_quirks(s2ram_quirks);
}
return 0;
}
return -1;
}
}
void s2ram_add_quirks(char *s2ram_quirks)
{
int i;
/* Move to lowercase */
for (i=0; s2ram_quirks[i]; i++)
s2ram_quirks[i] = tolower(s2ram_quirks[i]);
if (strstr(s2ram_quirks, "vbe_post") != NULL)
flags |= VBE_POST;
if (strstr(s2ram_quirks, "vbe_save") != NULL)
flags |= VBE_POST;
if (strstr(s2ram_quirks, "vbe_mode") != NULL)
flags |= VBE_MODE;
if (strstr(s2ram_quirks, "radeon_off") != NULL)
flags |= RADEON_OFF;
if (strstr(s2ram_quirks, "pci_save") != NULL)
flags |= PCI_SAVE;
if (strstr(s2ram_quirks, "s3_bios") != NULL)
flags |= S3_BIOS;
if (strstr(s2ram_quirks, "s3_mode") != NULL)
flags |= S3_MODE;
if (strstr(s2ram_quirks, "fb_nosuspend") != NULL)
fb_nosuspend = 1;
}
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