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authorIan Wisbon <ian.wisbon@timesys.com>2011-02-10 17:15:15 -0500
committerIan Wisbon <ian.wisbon@timesys.com>2011-02-14 14:29:06 -0500
commit14a4057959f8ee0a2249eb2abd64fd6b1f571d98 (patch)
tree6df655a665a5a56bd6b7cae5e2689fc5a1b6c965 /kernel/power/consoleearlysuspend.c
parent0eb553bf96e2c990d3bfccaa07da0863624c89ab (diff)
Digi Release Code - 02142011 Missing Files Fix2.6.31-digi-201102141503
Diffstat (limited to 'kernel/power/consoleearlysuspend.c')
-rw-r--r--kernel/power/consoleearlysuspend.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/kernel/power/consoleearlysuspend.c b/kernel/power/consoleearlysuspend.c
new file mode 100644
index 000000000000..b6c47d88584a
--- /dev/null
+++ b/kernel/power/consoleearlysuspend.c
@@ -0,0 +1,112 @@
+/* kernel/power/consoleearlysuspend.c
+ *
+ * Copyright (C) 2005-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/console.h>
+#include <linux/earlysuspend.h>
+#include <linux/kbd_kern.h>
+#include <linux/module.h>
+#include <linux/vt_kern.h>
+#include <linux/wait.h>
+
+#define EARLY_SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
+
+static int orig_fgconsole;
+static void console_early_suspend(struct early_suspend *h)
+{
+ acquire_console_sem();
+ orig_fgconsole = fg_console;
+ if (vc_allocate(EARLY_SUSPEND_CONSOLE))
+ goto err;
+ if (set_console(EARLY_SUSPEND_CONSOLE))
+ goto err;
+ release_console_sem();
+
+ if (vt_waitactive(EARLY_SUSPEND_CONSOLE))
+ pr_warning("console_early_suspend: Can't switch VCs.\n");
+ return;
+ err:
+ pr_warning("console_early_suspend: Can't set console\n");
+ release_console_sem();
+}
+
+static void console_late_resume(struct early_suspend *h)
+{
+ int ret;
+ acquire_console_sem();
+ ret = set_console(orig_fgconsole);
+ release_console_sem();
+ if (ret) {
+ pr_warning("console_late_resume: Can't set console.\n");
+ return;
+ }
+
+ if (vt_waitactive(orig_fgconsole))
+ pr_warning("console_late_resume: Can't switch VCs.\n");
+}
+
+static struct early_suspend console_early_suspend_desc = {
+ .level = EARLY_SUSPEND_LEVEL_STOP_DRAWING,
+ .suspend = console_early_suspend,
+ .resume = console_late_resume,
+};
+
+static ssize_t console_switch_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return 0;
+}
+
+#define power_ro_attr(_name) \
+ static struct kobj_attribute _name##_attr = { \
+ .attr = { \
+ .name = __stringify(_name), \
+ .mode = 0444, \
+ }, \
+ .show = _name##_show, \
+ .store = NULL, \
+ }
+
+power_ro_attr(console_switch);
+
+static struct attribute *g[] = {
+ &console_switch_attr.attr,
+ NULL,
+};
+
+static struct attribute_group attr_group = {
+ .attrs = g,
+};
+
+static int __init console_early_suspend_init(void)
+{
+ int ret;
+
+ ret = sysfs_create_group(power_kobj, &attr_group);
+ if (ret) {
+ pr_err("android_power_init: sysfs_create_group failed\n");
+ return ret;
+ }
+ register_early_suspend(&console_early_suspend_desc);
+ return 0;
+}
+
+static void __exit console_early_suspend_exit(void)
+{
+ unregister_early_suspend(&console_early_suspend_desc);
+ sysfs_remove_group(power_kobj, &attr_group);
+}
+
+module_init(console_early_suspend_init);
+module_exit(console_early_suspend_exit);