1 files changed, 168 insertions, 0 deletions

diff --git a/drivers/input/keyboard/ipaq-micro-keys.c b/drivers/input/keyboard/ipaq-micro-keys.c
new file mode 100644
index 000000000000..602900d1f937
--- /dev/null
+++ b/drivers/input/keyboard/ipaq-micro-keys.c
@@ -0,0 +1,168 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * h3600 atmel micro companion support, key subdevice
+ * based on previous kernel 2.4 version
+ * Author : Alessandro Gardich <gremlin@gremlin.it>
+ * Author : Linus Walleij <linus.walleij@linaro.org>
+ *
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/ipaq-micro.h>
+
+struct ipaq_micro_keys {
+        struct ipaq_micro *micro;
+        struct input_dev *input;
+        u16 *codes;
+};
+
+static const u16 micro_keycodes[] = {
+        KEY_RECORD,             /* 1:  Record button                    */
+        KEY_CALENDAR,           /* 2:  Calendar                         */
+        KEY_ADDRESSBOOK,        /* 3:  Contacts (looks like Outlook)    */
+        KEY_MAIL,               /* 4:  Envelope (Q on older iPAQs)      */
+        KEY_HOMEPAGE,           /* 5:  Start (looks like swoopy arrow)  */
+        KEY_UP,                 /* 6:  Up                               */
+        KEY_RIGHT,              /* 7:  Right                            */
+        KEY_LEFT,               /* 8:  Left                             */
+        KEY_DOWN,               /* 9:  Down                             */
+};
+
+static void micro_key_receive(void *data, int len, unsigned char *msg)
+{
+        struct ipaq_micro_keys *keys = data;
+        int key, down;
+
+        down = 0x80 & msg[0];
+        key  = 0x7f & msg[0];
+
+        if (key < ARRAY_SIZE(micro_keycodes)) {
+                input_report_key(keys->input, keys->codes[key], down);
+                input_sync(keys->input);
+        }
+}
+
+static void micro_key_start(struct ipaq_micro_keys *keys)
+{
+        spin_lock(&keys->micro->lock);
+        keys->micro->key = micro_key_receive;
+        keys->micro->key_data = keys;
+        spin_unlock(&keys->micro->lock);
+}
+
+static void micro_key_stop(struct ipaq_micro_keys *keys)
+{
+        spin_lock(&keys->micro->lock);
+        keys->micro->key = NULL;
+        keys->micro->key_data = NULL;
+        spin_unlock(&keys->micro->lock);
+}
+
+static int micro_key_open(struct input_dev *input)
+{
+        struct ipaq_micro_keys *keys = input_get_drvdata(input);
+
+        micro_key_start(keys);
+
+        return 0;
+}
+
+static void micro_key_close(struct input_dev *input)
+{
+        struct ipaq_micro_keys *keys = input_get_drvdata(input);
+
+        micro_key_stop(keys);
+}
+
+static int micro_key_probe(struct platform_device *pdev)
+{
+        struct ipaq_micro_keys *keys;
+        int error;
+        int i;
+
+        keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
+        if (!keys)
+                return -ENOMEM;
+
+        keys->micro = dev_get_drvdata(pdev->dev.parent);
+
+        keys->input = devm_input_allocate_device(&pdev->dev);
+        if (!keys->input)
+                return -ENOMEM;
+
+        keys->input->keycodesize = sizeof(micro_keycodes[0]);
+        keys->input->keycodemax = ARRAY_SIZE(micro_keycodes);
+        keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes,
+                           keys->input->keycodesize * keys->input->keycodemax,
+                           GFP_KERNEL);
+        keys->input->keycode = keys->codes;
+
+        __set_bit(EV_KEY, keys->input->evbit);
+        for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++)
+                __set_bit(micro_keycodes[i], keys->input->keybit);
+
+        keys->input->name = "h3600 micro keys";
+        keys->input->open = micro_key_open;
+        keys->input->close = micro_key_close;
+        input_set_drvdata(keys->input, keys);
+
+        error = input_register_device(keys->input);
+        if (error)
+                return error;
+
+        platform_set_drvdata(pdev, keys);
+        return 0;
+}
+
+static int __maybe_unused micro_key_suspend(struct device *dev)
+{
+        struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
+
+        micro_key_stop(keys);
+
+        return 0;
+}
+
+static int __maybe_unused micro_key_resume(struct device *dev)
+{
+        struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
+        struct input_dev *input = keys->input;
+
+        mutex_lock(&input->mutex);
+
+        if (input->users)
+                micro_key_start(keys);
+
+        mutex_unlock(&input->mutex);
+
+        return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
+                         micro_key_suspend, micro_key_resume);
+
+static struct platform_driver micro_key_device_driver = {
+        .driver = {
+                .name    = "ipaq-micro-keys",
+                .pm     = &micro_key_dev_pm_ops,
+        },
+        .probe   = micro_key_probe,
+};
+module_platform_driver(micro_key_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
+MODULE_ALIAS("platform:ipaq-micro-keys");