--- /dev/null
+/*
+ * Roccat Lua driver for Linux
+ *
+ * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>
+ */
+
+/*
+ * 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.
+ */
+
+/*
+ * Roccat Lua is a gamer mouse which cpi, button and light settings can be
+ * configured.
+ */
+
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/hid-roccat.h>
+#include "hid-ids.h"
+#include "hid-roccat-common.h"
+#include "hid-roccat-lua.h"
+
+static ssize_t lua_sysfs_read(struct file *fp, struct kobject *kobj,
+ char *buf, loff_t off, size_t count,
+ size_t real_size, uint command)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));
+ struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
+ int retval;
+
+ if (off >= real_size)
+ return 0;
+
+ if (off != 0 || count != real_size)
+ return -EINVAL;
+
+ mutex_lock(&lua->lua_lock);
+ retval = roccat_common2_receive(usb_dev, command, buf, real_size);
+ mutex_unlock(&lua->lua_lock);
+
+ return retval ? retval : real_size;
+}
+
+static ssize_t lua_sysfs_write(struct file *fp, struct kobject *kobj,
+ void const *buf, loff_t off, size_t count,
+ size_t real_size, uint command)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));
+ struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
+ int retval;
+
+ if (off != 0 || count != real_size)
+ return -EINVAL;
+
+ mutex_lock(&lua->lua_lock);
+ retval = roccat_common2_send(usb_dev, command, (void *)buf, real_size);
+ mutex_unlock(&lua->lua_lock);
+
+ return retval ? retval : real_size;
+}
+
+#define LUA_SYSFS_W(thingy, THINGY) \
+static ssize_t lua_sysfs_write_ ## thingy(struct file *fp, \
+ struct kobject *kobj, struct bin_attribute *attr, \
+ char *buf, loff_t off, size_t count) \
+{ \
+ return lua_sysfs_write(fp, kobj, buf, off, count, \
+ LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \
+}
+
+#define LUA_SYSFS_R(thingy, THINGY) \
+static ssize_t lua_sysfs_read_ ## thingy(struct file *fp, \
+ struct kobject *kobj, struct bin_attribute *attr, \
+ char *buf, loff_t off, size_t count) \
+{ \
+ return lua_sysfs_read(fp, kobj, buf, off, count, \
+ LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \
+}
+
+#define LUA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
+LUA_SYSFS_W(thingy, THINGY) \
+LUA_SYSFS_R(thingy, THINGY) \
+static struct bin_attribute lua_ ## thingy ## _attr = { \
+ .attr = { .name = #thingy, .mode = 0660 }, \
+ .size = LUA_SIZE_ ## THINGY, \
+ .read = lua_sysfs_read_ ## thingy, \
+ .write = lua_sysfs_write_ ## thingy \
+};
+
+LUA_BIN_ATTRIBUTE_RW(control, CONTROL)
+
+static int lua_create_sysfs_attributes(struct usb_interface *intf)
+{
+ return sysfs_create_bin_file(&intf->dev.kobj, &lua_control_attr);
+}
+
+static void lua_remove_sysfs_attributes(struct usb_interface *intf)
+{
+ sysfs_remove_bin_file(&intf->dev.kobj, &lua_control_attr);
+}
+
+static int lua_init_lua_device_struct(struct usb_device *usb_dev,
+ struct lua_device *lua)
+{
+ mutex_init(&lua->lua_lock);
+
+ return 0;
+}
+
+static int lua_init_specials(struct hid_device *hdev)
+{
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+ struct usb_device *usb_dev = interface_to_usbdev(intf);
+ struct lua_device *lua;
+ int retval;
+
+ lua = kzalloc(sizeof(*lua), GFP_KERNEL);
+ if (!lua) {
+ hid_err(hdev, "can't alloc device descriptor\n");
+ return -ENOMEM;
+ }
+ hid_set_drvdata(hdev, lua);
+
+ retval = lua_init_lua_device_struct(usb_dev, lua);
+ if (retval) {
+ hid_err(hdev, "couldn't init struct lua_device\n");
+ goto exit;
+ }
+
+ retval = lua_create_sysfs_attributes(intf);
+ if (retval) {
+ hid_err(hdev, "cannot create sysfs files\n");
+ goto exit;
+ }
+
+ return 0;
+exit:
+ kfree(lua);
+ return retval;
+}
+
+static void lua_remove_specials(struct hid_device *hdev)
+{
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+ struct lua_device *lua;
+
+ lua_remove_sysfs_attributes(intf);
+
+ lua = hid_get_drvdata(hdev);
+ kfree(lua);
+}
+
+static int lua_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ int retval;
+
+ retval = hid_parse(hdev);
+ if (retval) {
+ hid_err(hdev, "parse failed\n");
+ goto exit;
+ }
+
+ retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (retval) {
+ hid_err(hdev, "hw start failed\n");
+ goto exit;
+ }
+
+ retval = lua_init_specials(hdev);
+ if (retval) {
+ hid_err(hdev, "couldn't install mouse\n");
+ goto exit_stop;
+ }
+
+ return 0;
+
+exit_stop:
+ hid_hw_stop(hdev);
+exit:
+ return retval;
+}
+
+static void lua_remove(struct hid_device *hdev)
+{
+ lua_remove_specials(hdev);
+ hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id lua_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_LUA) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(hid, lua_devices);
+
+static struct hid_driver lua_driver = {
+ .name = "lua",
+ .id_table = lua_devices,
+ .probe = lua_probe,
+ .remove = lua_remove
+};
+
+static int __init lua_init(void)
+{
+ return hid_register_driver(&lua_driver);
+}
+
+static void __exit lua_exit(void)
+{
+ hid_unregister_driver(&lua_driver);
+}
+
+module_init(lua_init);
+module_exit(lua_exit);
+
+MODULE_AUTHOR("Stefan Achatz");
+MODULE_DESCRIPTION("USB Roccat Lua driver");
+MODULE_LICENSE("GPL v2");
projects / can-eth-gw-linux.git / blobdiff