aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hid/hid-roccat-savu.c
blob: 6dbf6e04dce75c82dd32109d46b330d5a60cd043 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
/*
 * Roccat Savu 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 Savu is a gamer mouse with macro keys that can be configured in
 * 5 profiles.
 */

#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-savu.h"

static struct class *savu_class;

ROCCAT_COMMON2_BIN_ATTRIBUTE_W(control, 0x4, 0x03);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile, 0x5, 0x03);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(general, 0x6, 0x10);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(buttons, 0x7, 0x2f);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(macro, 0x8, 0x0823);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(info, 0x9, 0x08);
ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(sensor, 0xc, 0x04);

static struct bin_attribute *savu_bin_attrs[] = {
	&bin_attr_control,
	&bin_attr_profile,
	&bin_attr_general,
	&bin_attr_buttons,
	&bin_attr_macro,
	&bin_attr_info,
	&bin_attr_sensor,
	NULL,
};

static const struct attribute_group savu_group = {
	.bin_attrs = savu_bin_attrs,
};

static const struct attribute_group *savu_groups[] = {
	&savu_group,
	NULL,
};

static int savu_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 roccat_common2_device *savu;
	int retval;

	if (intf->cur_altsetting->desc.bInterfaceProtocol
			!= USB_INTERFACE_PROTOCOL_MOUSE) {
		hid_set_drvdata(hdev, NULL);
		return 0;
	}

	savu = kzalloc(sizeof(*savu), GFP_KERNEL);
	if (!savu) {
		hid_err(hdev, "can't alloc device descriptor\n");
		return -ENOMEM;
	}
	hid_set_drvdata(hdev, savu);

	retval = roccat_common2_device_init_struct(usb_dev, savu);
	if (retval) {
		hid_err(hdev, "couldn't init Savu device\n");
		goto exit_free;
	}

	retval = roccat_connect(savu_class, hdev,
			sizeof(struct savu_roccat_report));
	if (retval < 0) {
		hid_err(hdev, "couldn't init char dev\n");
	} else {
		savu->chrdev_minor = retval;
		savu->roccat_claimed = 1;
	}

	return 0;
exit_free:
	kfree(savu);
	return retval;
}

static void savu_remove_specials(struct hid_device *hdev)
{
	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	struct roccat_common2_device *savu;

	if (intf->cur_altsetting->desc.bInterfaceProtocol
			!= USB_INTERFACE_PROTOCOL_MOUSE)
		return;

	savu = hid_get_drvdata(hdev);
	if (savu->roccat_claimed)
		roccat_disconnect(savu->chrdev_minor);
	kfree(savu);
}

static int savu_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 = savu_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 savu_remove(struct hid_device *hdev)
{
	savu_remove_specials(hdev);
	hid_hw_stop(hdev);
}

static void savu_report_to_chrdev(struct roccat_common2_device const *savu,
		u8 const *data)
{
	struct savu_roccat_report roccat_report;
	struct savu_mouse_report_special const *special_report;

	if (data[0] != SAVU_MOUSE_REPORT_NUMBER_SPECIAL)
		return;

	special_report = (struct savu_mouse_report_special const *)data;

	roccat_report.type = special_report->type;
	roccat_report.data[0] = special_report->data[0];
	roccat_report.data[1] = special_report->data[1];
	roccat_report_event(savu->chrdev_minor,
			(uint8_t const *)&roccat_report);
}

static int savu_raw_event(struct hid_device *hdev,
		struct hid_report *report, u8 *data, int size)
{
	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
	struct roccat_common2_device *savu = hid_get_drvdata(hdev);

	if (intf->cur_altsetting->desc.bInterfaceProtocol
			!= USB_INTERFACE_PROTOCOL_MOUSE)
		return 0;

	if (savu == NULL)
		return 0;

	if (savu->roccat_claimed)
		savu_report_to_chrdev(savu, data);

	return 0;
}

static const struct hid_device_id savu_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) },
	{ }
};

MODULE_DEVICE_TABLE(hid, savu_devices);

static struct hid_driver savu_driver = {
		.name = "savu",
		.id_table = savu_devices,
		.probe = savu_probe,
		.remove = savu_remove,
		.raw_event = savu_raw_event
};

static int __init savu_init(void)
{
	int retval;

	savu_class = class_create(THIS_MODULE, "savu");
	if (IS_ERR(savu_class))
		return PTR_ERR(savu_class);
	savu_class->dev_groups = savu_groups;

	retval = hid_register_driver(&savu_driver);
	if (retval)
		class_destroy(savu_class);
	return retval;
}

static void __exit savu_exit(void)
{
	hid_unregister_driver(&savu_driver);
	class_destroy(savu_class);
}

module_init(savu_init);
module_exit(savu_exit);

MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat Savu driver");
MODULE_LICENSE("GPL v2");