2 * Roccat Lua driver for Linux
4 * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
15 * Roccat Lua is a gamer mouse which cpi, button and light settings can be
19 #include <linux/device.h>
20 #include <linux/input.h>
21 #include <linux/hid.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/hid-roccat.h>
26 #include "hid-roccat-common.h"
27 #include "hid-roccat-lua.h"
29 static ssize_t lua_sysfs_read(struct file *fp, struct kobject *kobj,
30 char *buf, loff_t off, size_t count,
31 size_t real_size, uint command)
33 struct device *dev = container_of(kobj, struct device, kobj);
34 struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));
35 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
41 if (off != 0 || count != real_size)
44 mutex_lock(&lua->lua_lock);
45 retval = roccat_common2_receive(usb_dev, command, buf, real_size);
46 mutex_unlock(&lua->lua_lock);
48 return retval ? retval : real_size;
51 static ssize_t lua_sysfs_write(struct file *fp, struct kobject *kobj,
52 void const *buf, loff_t off, size_t count,
53 size_t real_size, uint command)
55 struct device *dev = container_of(kobj, struct device, kobj);
56 struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));
57 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
60 if (off != 0 || count != real_size)
63 mutex_lock(&lua->lua_lock);
64 retval = roccat_common2_send(usb_dev, command, (void *)buf, real_size);
65 mutex_unlock(&lua->lua_lock);
67 return retval ? retval : real_size;
70 #define LUA_SYSFS_W(thingy, THINGY) \
71 static ssize_t lua_sysfs_write_ ## thingy(struct file *fp, \
72 struct kobject *kobj, struct bin_attribute *attr, \
73 char *buf, loff_t off, size_t count) \
75 return lua_sysfs_write(fp, kobj, buf, off, count, \
76 LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \
79 #define LUA_SYSFS_R(thingy, THINGY) \
80 static ssize_t lua_sysfs_read_ ## thingy(struct file *fp, \
81 struct kobject *kobj, struct bin_attribute *attr, \
82 char *buf, loff_t off, size_t count) \
84 return lua_sysfs_read(fp, kobj, buf, off, count, \
85 LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \
88 #define LUA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
89 LUA_SYSFS_W(thingy, THINGY) \
90 LUA_SYSFS_R(thingy, THINGY) \
91 static struct bin_attribute lua_ ## thingy ## _attr = { \
92 .attr = { .name = #thingy, .mode = 0660 }, \
93 .size = LUA_SIZE_ ## THINGY, \
94 .read = lua_sysfs_read_ ## thingy, \
95 .write = lua_sysfs_write_ ## thingy \
98 LUA_BIN_ATTRIBUTE_RW(control, CONTROL)
100 static int lua_create_sysfs_attributes(struct usb_interface *intf)
102 return sysfs_create_bin_file(&intf->dev.kobj, &lua_control_attr);
105 static void lua_remove_sysfs_attributes(struct usb_interface *intf)
107 sysfs_remove_bin_file(&intf->dev.kobj, &lua_control_attr);
110 static int lua_init_lua_device_struct(struct usb_device *usb_dev,
111 struct lua_device *lua)
113 mutex_init(&lua->lua_lock);
118 static int lua_init_specials(struct hid_device *hdev)
120 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
121 struct usb_device *usb_dev = interface_to_usbdev(intf);
122 struct lua_device *lua;
125 lua = kzalloc(sizeof(*lua), GFP_KERNEL);
127 hid_err(hdev, "can't alloc device descriptor\n");
130 hid_set_drvdata(hdev, lua);
132 retval = lua_init_lua_device_struct(usb_dev, lua);
134 hid_err(hdev, "couldn't init struct lua_device\n");
138 retval = lua_create_sysfs_attributes(intf);
140 hid_err(hdev, "cannot create sysfs files\n");
150 static void lua_remove_specials(struct hid_device *hdev)
152 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
153 struct lua_device *lua;
155 lua_remove_sysfs_attributes(intf);
157 lua = hid_get_drvdata(hdev);
161 static int lua_probe(struct hid_device *hdev,
162 const struct hid_device_id *id)
166 retval = hid_parse(hdev);
168 hid_err(hdev, "parse failed\n");
172 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
174 hid_err(hdev, "hw start failed\n");
178 retval = lua_init_specials(hdev);
180 hid_err(hdev, "couldn't install mouse\n");
192 static void lua_remove(struct hid_device *hdev)
194 lua_remove_specials(hdev);
198 static const struct hid_device_id lua_devices[] = {
199 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_LUA) },
203 MODULE_DEVICE_TABLE(hid, lua_devices);
205 static struct hid_driver lua_driver = {
207 .id_table = lua_devices,
212 static int __init lua_init(void)
214 return hid_register_driver(&lua_driver);
217 static void __exit lua_exit(void)
219 hid_unregister_driver(&lua_driver);
222 module_init(lua_init);
223 module_exit(lua_exit);
225 MODULE_AUTHOR("Stefan Achatz");
226 MODULE_DESCRIPTION("USB Roccat Lua driver");
227 MODULE_LICENSE("GPL v2");