2 * Force feedback support for Zeroplus based devices
4 * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #define debug(format, arg...) pr_debug("hid-zpff: " format "\n" , ## arg)
28 #include <linux/input.h>
29 #include <linux/usb.h>
33 struct hid_report *report;
36 static int hid_zpff_play(struct input_dev *dev, void *data,
37 struct ff_effect *effect)
39 struct hid_device *hid = dev->private;
40 struct zpff_device *zpff = data;
44 * The following is specified the other way around in the Zeroplus
45 * datasheet but the order below is correct for the XFX Executioner;
46 * however it is possible that the XFX Executioner is an exception
49 left = effect->u.rumble.strong_magnitude;
50 right = effect->u.rumble.weak_magnitude;
51 debug("called with 0x%04x 0x%04x", left, right);
53 left = left * 0x7f / 0xffff;
54 right = right * 0x7f / 0xffff;
56 zpff->report->field[2]->value[0] = left;
57 zpff->report->field[3]->value[0] = right;
58 debug("running with 0x%02x 0x%02x", left, right);
59 hid_submit_report(hid, zpff->report, USB_DIR_OUT);
64 int hid_zpff_init(struct hid_device *hid)
66 struct zpff_device *zpff;
67 struct hid_report *report;
68 struct hid_input *hidinput = list_entry(hid->inputs.next,
69 struct hid_input, list);
70 struct list_head *report_list =
71 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
72 struct input_dev *dev = hidinput->input;
75 if (list_empty(report_list)) {
76 printk(KERN_ERR "hid-zpff: no output report found\n");
80 report = list_entry(report_list->next, struct hid_report, list);
82 if (report->maxfield < 4) {
83 printk(KERN_ERR "hid-zpff: not enough fields in report\n");
87 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
91 set_bit(FF_RUMBLE, dev->ffbit);
93 error = input_ff_create_memless(dev, zpff, hid_zpff_play);
99 zpff->report = report;
100 zpff->report->field[0]->value[0] = 0x00;
101 zpff->report->field[1]->value[0] = 0x02;
102 zpff->report->field[2]->value[0] = 0x00;
103 zpff->report->field[3]->value[0] = 0x00;
104 hid_submit_report(hid, zpff->report, USB_DIR_OUT);
106 printk(KERN_INFO "Force feedback for Zeroplus based devices by "
107 "Anssi Hannula <anssi.hannula@gmail.com>\n");