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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
4424f616 SA |
2 | /* |
3 | * Roccat Lua driver for Linux | |
4 | * | |
5 | * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net> | |
6 | */ | |
7 | ||
8 | /* | |
4424f616 SA |
9 | */ |
10 | ||
11 | /* | |
12 | * Roccat Lua is a gamer mouse which cpi, button and light settings can be | |
13 | * configured. | |
14 | */ | |
15 | ||
16 | #include <linux/device.h> | |
17 | #include <linux/input.h> | |
18 | #include <linux/hid.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/hid-roccat.h> | |
22 | #include "hid-ids.h" | |
23 | #include "hid-roccat-common.h" | |
24 | #include "hid-roccat-lua.h" | |
25 | ||
26 | static ssize_t lua_sysfs_read(struct file *fp, struct kobject *kobj, | |
27 | char *buf, loff_t off, size_t count, | |
28 | size_t real_size, uint command) | |
29 | { | |
2cf83833 | 30 | struct device *dev = kobj_to_dev(kobj); |
4424f616 SA |
31 | struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev)); |
32 | struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev)); | |
33 | int retval; | |
34 | ||
35 | if (off >= real_size) | |
36 | return 0; | |
37 | ||
38 | if (off != 0 || count != real_size) | |
39 | return -EINVAL; | |
40 | ||
41 | mutex_lock(&lua->lua_lock); | |
42 | retval = roccat_common2_receive(usb_dev, command, buf, real_size); | |
43 | mutex_unlock(&lua->lua_lock); | |
44 | ||
45 | return retval ? retval : real_size; | |
46 | } | |
47 | ||
48 | static ssize_t lua_sysfs_write(struct file *fp, struct kobject *kobj, | |
49 | void const *buf, loff_t off, size_t count, | |
50 | size_t real_size, uint command) | |
51 | { | |
2cf83833 | 52 | struct device *dev = kobj_to_dev(kobj); |
4424f616 SA |
53 | struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev)); |
54 | struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev)); | |
55 | int retval; | |
56 | ||
57 | if (off != 0 || count != real_size) | |
58 | return -EINVAL; | |
59 | ||
60 | mutex_lock(&lua->lua_lock); | |
0a9597b7 | 61 | retval = roccat_common2_send(usb_dev, command, buf, real_size); |
4424f616 SA |
62 | mutex_unlock(&lua->lua_lock); |
63 | ||
64 | return retval ? retval : real_size; | |
65 | } | |
66 | ||
67 | #define LUA_SYSFS_W(thingy, THINGY) \ | |
68 | static ssize_t lua_sysfs_write_ ## thingy(struct file *fp, \ | |
69 | struct kobject *kobj, struct bin_attribute *attr, \ | |
70 | char *buf, loff_t off, size_t count) \ | |
71 | { \ | |
72 | return lua_sysfs_write(fp, kobj, buf, off, count, \ | |
73 | LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \ | |
74 | } | |
75 | ||
76 | #define LUA_SYSFS_R(thingy, THINGY) \ | |
77 | static ssize_t lua_sysfs_read_ ## thingy(struct file *fp, \ | |
78 | struct kobject *kobj, struct bin_attribute *attr, \ | |
79 | char *buf, loff_t off, size_t count) \ | |
80 | { \ | |
81 | return lua_sysfs_read(fp, kobj, buf, off, count, \ | |
82 | LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \ | |
83 | } | |
84 | ||
85 | #define LUA_BIN_ATTRIBUTE_RW(thingy, THINGY) \ | |
86 | LUA_SYSFS_W(thingy, THINGY) \ | |
87 | LUA_SYSFS_R(thingy, THINGY) \ | |
88 | static struct bin_attribute lua_ ## thingy ## _attr = { \ | |
89 | .attr = { .name = #thingy, .mode = 0660 }, \ | |
90 | .size = LUA_SIZE_ ## THINGY, \ | |
91 | .read = lua_sysfs_read_ ## thingy, \ | |
92 | .write = lua_sysfs_write_ ## thingy \ | |
93 | }; | |
94 | ||
95 | LUA_BIN_ATTRIBUTE_RW(control, CONTROL) | |
96 | ||
97 | static int lua_create_sysfs_attributes(struct usb_interface *intf) | |
98 | { | |
99 | return sysfs_create_bin_file(&intf->dev.kobj, &lua_control_attr); | |
100 | } | |
101 | ||
102 | static void lua_remove_sysfs_attributes(struct usb_interface *intf) | |
103 | { | |
104 | sysfs_remove_bin_file(&intf->dev.kobj, &lua_control_attr); | |
105 | } | |
106 | ||
107 | static int lua_init_lua_device_struct(struct usb_device *usb_dev, | |
108 | struct lua_device *lua) | |
109 | { | |
110 | mutex_init(&lua->lua_lock); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int lua_init_specials(struct hid_device *hdev) | |
116 | { | |
117 | struct usb_interface *intf = to_usb_interface(hdev->dev.parent); | |
118 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
119 | struct lua_device *lua; | |
120 | int retval; | |
121 | ||
122 | lua = kzalloc(sizeof(*lua), GFP_KERNEL); | |
123 | if (!lua) { | |
124 | hid_err(hdev, "can't alloc device descriptor\n"); | |
125 | return -ENOMEM; | |
126 | } | |
127 | hid_set_drvdata(hdev, lua); | |
128 | ||
129 | retval = lua_init_lua_device_struct(usb_dev, lua); | |
130 | if (retval) { | |
131 | hid_err(hdev, "couldn't init struct lua_device\n"); | |
132 | goto exit; | |
133 | } | |
134 | ||
135 | retval = lua_create_sysfs_attributes(intf); | |
136 | if (retval) { | |
137 | hid_err(hdev, "cannot create sysfs files\n"); | |
138 | goto exit; | |
139 | } | |
140 | ||
141 | return 0; | |
142 | exit: | |
143 | kfree(lua); | |
144 | return retval; | |
145 | } | |
146 | ||
147 | static void lua_remove_specials(struct hid_device *hdev) | |
148 | { | |
149 | struct usb_interface *intf = to_usb_interface(hdev->dev.parent); | |
150 | struct lua_device *lua; | |
151 | ||
152 | lua_remove_sysfs_attributes(intf); | |
153 | ||
154 | lua = hid_get_drvdata(hdev); | |
155 | kfree(lua); | |
156 | } | |
157 | ||
158 | static int lua_probe(struct hid_device *hdev, | |
159 | const struct hid_device_id *id) | |
160 | { | |
161 | int retval; | |
162 | ||
93020953 GKH |
163 | if (!hid_is_usb(hdev)) |
164 | return -EINVAL; | |
165 | ||
4424f616 SA |
166 | retval = hid_parse(hdev); |
167 | if (retval) { | |
168 | hid_err(hdev, "parse failed\n"); | |
169 | goto exit; | |
170 | } | |
171 | ||
172 | retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); | |
173 | if (retval) { | |
174 | hid_err(hdev, "hw start failed\n"); | |
175 | goto exit; | |
176 | } | |
177 | ||
178 | retval = lua_init_specials(hdev); | |
179 | if (retval) { | |
180 | hid_err(hdev, "couldn't install mouse\n"); | |
181 | goto exit_stop; | |
182 | } | |
183 | ||
184 | return 0; | |
185 | ||
186 | exit_stop: | |
187 | hid_hw_stop(hdev); | |
188 | exit: | |
189 | return retval; | |
190 | } | |
191 | ||
192 | static void lua_remove(struct hid_device *hdev) | |
193 | { | |
194 | lua_remove_specials(hdev); | |
195 | hid_hw_stop(hdev); | |
196 | } | |
197 | ||
198 | static const struct hid_device_id lua_devices[] = { | |
199 | { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_LUA) }, | |
200 | { } | |
201 | }; | |
202 | ||
203 | MODULE_DEVICE_TABLE(hid, lua_devices); | |
204 | ||
205 | static struct hid_driver lua_driver = { | |
206 | .name = "lua", | |
207 | .id_table = lua_devices, | |
208 | .probe = lua_probe, | |
209 | .remove = lua_remove | |
210 | }; | |
f425458e | 211 | module_hid_driver(lua_driver); |
4424f616 SA |
212 | |
213 | MODULE_AUTHOR("Stefan Achatz"); | |
214 | MODULE_DESCRIPTION("USB Roccat Lua driver"); | |
215 | MODULE_LICENSE("GPL v2"); |