New haptic class support.
This class handles the haptic devices.
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/haptic/Kconfig | 14 +++
drivers/haptic/Makefile | 2 +
drivers/haptic/haptic-class.c | 255 +++++++++++++++++++++++++++++++++++++++++
drivers/haptic/haptic.h | 35 ++++++
include/linux/haptic.h | 85 ++++++++++++++
5 files changed, 391 insertions(+), 0 deletions(-)
create mode 100644 drivers/haptic/Kconfig
create mode 100644 drivers/haptic/Makefile
create mode 100644 drivers/haptic/haptic-class.c
create mode 100644 drivers/haptic/haptic.h
create mode 100644 include/linux/haptic.h
diff --git a/drivers/haptic/Kconfig b/drivers/haptic/Kconfig
new file mode 100644
index 0000000..656b022
--- /dev/null
+++ b/drivers/haptic/Kconfig
@@ -0,0 +1,14 @@
+menuconfig HAPTIC
+ bool "Haptic support"
+ help
+ Say Y to enable haptic support. It enables the haptic and controls
+ from userspace.
+
+if HAPTIC
+
+config HAPTIC_CLASS
+ tristate "Haptic Class Support"
+ help
+ This option enables the haptic sysfs class in /sys/class/haptic.
+
+endif # HAPTIC
diff --git a/drivers/haptic/Makefile b/drivers/haptic/Makefile
new file mode 100644
index 0000000..d30f8cd
--- /dev/null
+++ b/drivers/haptic/Makefile
@@ -0,0 +1,2 @@
+# Haptic Core
+obj-$(CONFIG_HAPTIC_CLASS) += haptic-class.o
diff --git a/drivers/haptic/haptic-class.c b/drivers/haptic/haptic-class.c
new file mode 100644
index 0000000..d2151bc
--- /dev/null
+++ b/drivers/haptic/haptic-class.c
@@ -0,0 +1,255 @@
+/*
+ * Haptic Class Core
+ *
+ * Copyright (C) 2008 - 2009 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/rwsem.h>
+#include <linux/sysdev.h>
+#include <linux/timer.h>
+#include <linux/err.h>
+#include <linux/ctype.h>
+#include <linux/haptic.h>
+#include "haptic.h"
+
+static DECLARE_RWSEM(haptic_list_lock);
+static LIST_HEAD(haptic_list);
+static struct class *haptic_class;
+static struct class_dev_iter *iter;
+
+static void haptic_update_value(struct haptic_classdev *haptic_cdev)
+{
+ if (haptic_cdev->get)
+ haptic_cdev->value = haptic_cdev->get(haptic_cdev);
+}
+
+#define ATTR_DEF_SHOW(name) \
+static ssize_t haptic_show_##name(struct class *class, \
+ char *buf) \
+{ \
+ struct device *dev; \
+ struct haptic_classdev *haptic_cdev; \
+ ssize_t ret = -EINVAL; \
+ \
+ class_dev_iter_init(iter, haptic_class, NULL, NULL); \
+ while ((dev = class_dev_iter_next(iter))) { \
+ haptic_cdev = dev_get_drvdata(dev); \
+ if (haptic_cdev->show_##name) \
+ ret = haptic_cdev->show_##name(dev, NULL, buf); \
+ } \
+ \
+ return ret; \
+}
+
+#define ATTR_DEF_STORE(name) \
+static ssize_t haptic_store_##name(struct class *class, \
+ const char *buf, size_t count) \
+{ \
+ struct device *dev; \
+ struct haptic_classdev *haptic_cdev; \
+ ssize_t ret = -EINVAL; \
+ \
+ class_dev_iter_init(iter, haptic_class, NULL, NULL); \
+ while ((dev = class_dev_iter_next(iter))) { \
+ haptic_cdev = dev_get_drvdata(dev); \
+ if (haptic_cdev->store_##name) \
+ ret = haptic_cdev->store_##name( \
+ dev, NULL, buf, count); \
+ } \
+ \
+ return ret; \
+}
+
+ATTR_DEF_SHOW(enable);
+ATTR_DEF_STORE(enable);
+static CLASS_ATTR(enable, 0644, haptic_show_enable, haptic_store_enable);
+
+ATTR_DEF_STORE(oneshot);
+static CLASS_ATTR(oneshot, 0200, NULL, haptic_store_oneshot);
+
+ATTR_DEF_SHOW(level);
+ATTR_DEF_STORE(level);
+static CLASS_ATTR(level, 0644, haptic_show_level, haptic_store_level);
+
+ATTR_DEF_SHOW(level_max);
+static CLASS_ATTR(level_max, 0444, haptic_show_level_max, NULL);
+
+static ssize_t haptic_show_value(struct class *class,
+ char *buf)
+{
+ struct device *dev;
+ struct haptic_classdev *haptic_cdev;
+ ssize_t ret = 0;
+
+ class_dev_iter_init(iter, haptic_class, NULL, NULL);
+ while ((dev = class_dev_iter_next(iter))) {
+ haptic_cdev = dev_get_drvdata(dev);
+
+ /* no lock needed for this */
+ haptic_update_value(haptic_cdev);
+ sprintf(buf, "%u\n", haptic_get_value(haptic_cdev));
+ ret = strlen(buf) + 1;
+ }
+
+ return ret;
+}
+
+static ssize_t haptic_store_value(struct class *class,
+ const char *buf, size_t count)
+{
+ struct device *dev;
+ struct haptic_classdev *haptic_cdev;
+ ssize_t ret = -EINVAL;
+ unsigned long val;
+
+ class_dev_iter_init(iter, haptic_class, NULL, NULL);
+ while ((dev = class_dev_iter_next(iter))) {
+ haptic_cdev = dev_get_drvdata(dev);
+ ret = strict_strtoul(buf, 10, &val);
+ if (ret == 0) {
+ ret = count;
+ haptic_set_value(haptic_cdev, val);
+ }
+ }
+
+ return ret;
+}
+static CLASS_ATTR(value, 0644, haptic_show_value, haptic_store_value);
+
+/**
+ * haptic_classdev_suspend - suspend an haptic_classdev.
+ * @haptic_cdev: the haptic_classdev to suspend.
+ */
+void haptic_classdev_suspend(struct haptic_classdev *haptic_cdev)
+{
+ haptic_cdev->flags |= HAPTIC_SUSPENDED;
+ haptic_cdev->set(haptic_cdev, HAPTIC_OFF);
+}
+EXPORT_SYMBOL_GPL(haptic_classdev_suspend);
+
+/**
+ * haptic_classdev_resume - resume an haptic_classdev.
+ * @haptic_cdev: the haptic_classdev to resume.
+ */
+void haptic_classdev_resume(struct haptic_classdev *haptic_cdev)
+{
+ haptic_cdev->set(haptic_cdev, haptic_cdev->value);
+ haptic_cdev->flags &= ~HAPTIC_SUSPENDED;
+}
+EXPORT_SYMBOL_GPL(haptic_classdev_resume);
+
+/**
+ * haptic_classdev_register - register a new object of haptic_classdev class.
+ * @dev: The device to register.
+ * @haptic_cdev: the haptic_classdev structure for this device.
+ */
+int haptic_classdev_register(struct device *parent,
+ struct haptic_classdev *haptic_cdev)
+{
+ int ret;
+
+ haptic_cdev->dev = device_create(haptic_class, parent, 0,
+ haptic_cdev, "%s", haptic_cdev->name);
+ if (IS_ERR(haptic_cdev->dev))
+ return PTR_ERR(haptic_cdev->dev);
+
+ /* register the attributes */
+ ret = class_create_file(haptic_class, &class_attr_enable);
+ if (ret) {
+ printk(KERN_ERR "%s: class_create_file(enable) failed\n",
+ __func__);
+ return ret;
+ }
+ ret = class_create_file(haptic_class, &class_attr_oneshot);
+ if (ret) {
+ printk(KERN_ERR "%s: class_create_file(oneshot) failed\n",
+ __func__);
+ return ret;
+ }
+ ret = class_create_file(haptic_class, &class_attr_level);
+ if (ret) {
+ printk(KERN_ERR "%s: class_create_file(level) failed\n",
+ __func__);
+ return ret;
+ }
+ ret = class_create_file(haptic_class, &class_attr_level_max);
+ if (ret) {
+ printk(KERN_ERR "%s: class_create_file(level_max) failed\n",
+ __func__);
+ return ret;
+ }
+ ret = class_create_file(haptic_class, &class_attr_value);
+ if (ret) {
+ printk(KERN_ERR "%s: class_create_file(value) failed\n",
+ __func__);
+ return ret;
+ }
+
+ /* add to the list of haptic */
+ down_write(&haptic_list_lock);
+ list_add_tail(&haptic_cdev->node, &haptic_list);
+ up_write(&haptic_list_lock);
+
+ haptic_update_value(haptic_cdev);
+
+ printk(KERN_INFO "Registered haptic device: %s\n", haptic_cdev->name);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(haptic_classdev_register);
+
+/**
+ * haptic_classdev_unregister - unregisters a object of haptic class.
+ * @haptic_cdev: the haptic device to unregister
+ *
+ * Unregisters a previously registered via haptic_classdev_register object.
+ */
+void haptic_classdev_unregister(struct haptic_classdev *haptic_cdev)
+{
+ class_remove_file(haptic_class, &class_attr_enable);
+ class_remove_file(haptic_class, &class_attr_oneshot);
+ class_remove_file(haptic_class, &class_attr_level);
+ class_remove_file(haptic_class, &class_attr_level_max);
+ class_remove_file(haptic_class, &class_attr_value);
+
+ device_unregister(haptic_cdev->dev);
+
+ down_write(&haptic_list_lock);
+ list_del(&haptic_cdev->node);
+ up_write(&haptic_list_lock);
+}
+EXPORT_SYMBOL_GPL(haptic_classdev_unregister);
+
+static int __init haptic_init(void)
+{
+ haptic_class = class_create(THIS_MODULE, "haptic");
+ if (IS_ERR(haptic_class))
+ return PTR_ERR(haptic_class);
+
+ iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
+ if (!iter)
+ return -ENOMEM;
+ return 0;
+}
+subsys_initcall(haptic_init);
+
+static void __exit haptic_exit(void)
+{
+ class_destroy(haptic_class);
+ kfree(iter);
+}
+module_exit(haptic_exit);
+
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Haptic Class Interface");
diff --git a/drivers/haptic/haptic.h b/drivers/haptic/haptic.h
new file mode 100644
index 0000000..888aaa3
--- /dev/null
+++ b/drivers/haptic/haptic.h
@@ -0,0 +1,35 @@
+/*
+ * Haptic Core
+ *
+ * Copyright (C) 2008 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+
+#ifndef __HAPTIC_H_INCLUDED
+#define __HAPTIC_H_INCLUDED
+
+#include <linux/device.h>
+#include <linux/rwsem.h>
+#include <linux/haptic.h>
+
+static inline void haptic_set_value(struct haptic_classdev *haptic_cdev,
+ enum haptic_value value)
+{
+ if (value > HAPTIC_FULL)
+ value = HAPTIC_FULL;
+ haptic_cdev->value = value;
+ if (!(haptic_cdev->flags & HAPTIC_SUSPENDED))
+ haptic_cdev->set(haptic_cdev, value);
+}
+
+static inline int haptic_get_value(struct haptic_classdev *haptic_cdev)
+{
+ return haptic_cdev->value;
+}
+
+#endif /* __HAPTIC_H_INCLUDED */
diff --git a/include/linux/haptic.h b/include/linux/haptic.h
new file mode 100644
index 0000000..c8c0778
--- /dev/null
+++ b/include/linux/haptic.h
@@ -0,0 +1,85 @@
+/*
+ * Driver model for haptic
+ *
+ * Copyright (C) 2008 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+
+#ifndef __LINUX_HAPTIC_H_INCLUDED
+#define __LINUX_HAPTIC_H_INCLUDED
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/rwsem.h>
+
+struct device;
+/*
+ * Motor Core
+ */
+
+enum haptic_value {
+ HAPTIC_OFF = 0,
+ HAPTIC_HALF = 127,
+ HAPTIC_FULL = 255,
+};
+
+struct haptic_classdev {
+ const char *name;
+ int value;
+#define HAPTIC_SUSPENDED (1 << 0)
+ int flags;
+
+ /* Set haptic value */
+ /* Must not sleep, use a workqueue if needed */
+ void (*set)(struct haptic_classdev *self,
+ enum haptic_value value);
+ /* Get haptic value */
+ enum haptic_value (*get)(struct haptic_classdev *self);
+
+ ssize_t (*show_enable)(struct device *dev,
+ struct device_attribute *attr, char *buf);
+ ssize_t (*store_enable)(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size);
+
+ ssize_t (*store_oneshot)(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size);
+
+ ssize_t (*show_level)(struct device *dev,
+ struct device_attribute *attr, char *buf);
+ ssize_t (*store_level)(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size);
+
+ ssize_t (*show_level_max)(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+ struct device *dev;
+ struct list_head node; /* Motor Device list */
+};
+
+extern int haptic_classdev_register(struct device *parent,
+ struct haptic_classdev *haptic_cdev);
+extern void haptic_classdev_unregister(struct haptic_classdev *lcd);
+extern void haptic_classdev_suspend(struct haptic_classdev *haptic_cdev);
+extern void haptic_classdev_resume(struct haptic_classdev *haptic_cdev);
+
+/*
+ * Generic and gpio haptic platform data for describing haptic names.
+ */
+struct haptic_platform_data {
+ const char *name;
+ int pwm_timer;
+ int gpio;
+ void (*setup_pin)(void);
+ u8 active_low;
+ int ldo_level;
+};
+
+#endif /* __LINUX_HAPTIC_H_INCLUDED */
--
1.5.3.3
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