1 files changed, 169 insertions, 0 deletions

diff --git a/drivers/input/power.c b/drivers/input/power.c
new file mode 100644
index 000000000000..bfc5c63ebffe
--- /dev/null
+++ b/drivers/input/power.c
@@ -0,0 +1,169 @@
+/*
+ * $Id: power.c,v 1.10 2001/09/25 09:17:15 vojtech Exp $
+ *
+ *  Copyright (c) 2001 "Crazy" James Simmons
+ *
+ *  Input driver Power Management.
+ *
+ *  Sponsored by Transvirtual Technology.
+ */
+
+/*
+ * 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
+ *
+ * Should you need to contact me, the author, you can do so by
+ * e-mail - mail your message to <jsimmons@transvirtual.com>.
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+
+static struct input_handler power_handler;
+
+/*
+ * Power management can't be done in a interrupt context. So we have to
+ * use keventd.
+ */
+static int suspend_button_pushed = 0;
+static void suspend_button_task_handler(void *data)
+{
+        udelay(200); /* debounce */
+        suspend_button_pushed = 0;
+}
+
+static DECLARE_WORK(suspend_button_task, suspend_button_task_handler, NULL);
+
+static void power_event(struct input_handle *handle, unsigned int type,
+                        unsigned int code, int down)
+{
+        struct input_dev *dev = handle->dev;
+
+        printk("Entering power_event\n");
+
+        if (type == EV_PWR) {
+                switch (code) {
+                        case KEY_SUSPEND:
+                                printk("Powering down entire device\n");
+
+                                if (!suspend_button_pushed) {
+                                        suspend_button_pushed = 1;
+                                        schedule_work(&suspend_button_task);
+                                }
+                                break;
+                        case KEY_POWER:
+                                /* Hum power down the machine. */
+                                break;
+                        default:
+                                return;
+                }
+        }
+
+        if (type == EV_KEY) {
+                switch (code) {
+                        case KEY_SUSPEND:
+                                printk("Powering down input device\n");
+                                /* This is risky. See pm.h for details. */
+                                if (dev->state != PM_RESUME)
+                                        dev->state = PM_RESUME;
+                                else
+                                        dev->state = PM_SUSPEND;
+                                pm_send(dev->pm_dev, dev->state, dev);
+                                break;
+                        case KEY_POWER:
+                                /* Turn the input device off completely ? */
+                                break;
+                        default:
+                                return;
+                }
+        }
+        return;
+}
+
+static struct input_handle *power_connect(struct input_handler *handler,
+                                          struct input_dev *dev,
+                                          struct input_device_id *id)
+{
+        struct input_handle *handle;
+
+        if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL)))
+                return NULL;
+        memset(handle, 0, sizeof(struct input_handle));
+
+        handle->dev = dev;
+        handle->handler = handler;
+
+        input_open_device(handle);
+
+        printk(KERN_INFO "power.c: Adding power management to input layer\n");
+        return handle;
+}
+
+static void power_disconnect(struct input_handle *handle)
+{
+        input_close_device(handle);
+        kfree(handle);
+}
+
+static struct input_device_id power_ids[] = {
+        {
+                .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+                .evbit = { BIT(EV_KEY) },
+                .keybit = { [LONG(KEY_SUSPEND)] = BIT(KEY_SUSPEND) }
+        },
+        {
+                .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+                .evbit = { BIT(EV_KEY) },
+                .keybit = { [LONG(KEY_POWER)] = BIT(KEY_POWER) }
+        },
+        {
+                .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+                .evbit = { BIT(EV_PWR) },
+        },
+        { },    /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(input, power_ids);
+
+static struct input_handler power_handler = {
+        .event =        power_event,
+        .connect =      power_connect,
+        .disconnect =   power_disconnect,
+        .name =         "power",
+        .id_table =     power_ids,
+};
+
+static int __init power_init(void)
+{
+        input_register_handler(&power_handler);
+        return 0;
+}
+
+static void __exit power_exit(void)
+{
+        input_unregister_handler(&power_handler);
+}
+
+module_init(power_init);
+module_exit(power_exit);
+
+MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
+MODULE_DESCRIPTION("Input Power Management driver");
+MODULE_LICENSE("GPL");