Root/drivers/hid/hid-pl.c

1/*
2 * Force feedback support for PantherLord/GreenAsia based devices
3 *
4 * The devices are distributed under various names and the same USB device ID
5 * can be used in both adapters and actual game controllers.
6 *
7 * 0810:0001 "Twin USB Joystick"
8 * - tested with PantherLord USB/PS2 2in1 Adapter
9 * - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
10 *
11 * 0e8f:0003 "GreenAsia Inc. USB Joystick "
12 * - tested with König Gaming gamepad
13 *
14 * 0e8f:0003 "GASIA USB Gamepad"
15 * - another version of the König gamepad
16 *
17 * Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
18 */
19
20/*
21 * This program is free software; you can redistribute it and/or modify
22 * it under the terms of the GNU General Public License as published by
23 * the Free Software Foundation; either version 2 of the License, or
24 * (at your option) any later version.
25 *
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
30 *
31 * You should have received a copy of the GNU General Public License
32 * along with this program; if not, write to the Free Software
33 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 */
35
36
37/* #define DEBUG */
38
39#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
40
41#include <linux/input.h>
42#include <linux/slab.h>
43#include <linux/module.h>
44#include <linux/usb.h>
45#include <linux/hid.h>
46
47#include "hid-ids.h"
48
49#ifdef CONFIG_PANTHERLORD_FF
50#include "usbhid/usbhid.h"
51
52struct plff_device {
53    struct hid_report *report;
54    s32 *strong;
55    s32 *weak;
56};
57
58static int hid_plff_play(struct input_dev *dev, void *data,
59             struct ff_effect *effect)
60{
61    struct hid_device *hid = input_get_drvdata(dev);
62    struct plff_device *plff = data;
63    int left, right;
64
65    left = effect->u.rumble.strong_magnitude;
66    right = effect->u.rumble.weak_magnitude;
67    debug("called with 0x%04x 0x%04x", left, right);
68
69    left = left * 0x7f / 0xffff;
70    right = right * 0x7f / 0xffff;
71
72    *plff->strong = left;
73    *plff->weak = right;
74    debug("running with 0x%02x 0x%02x", left, right);
75    usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
76
77    return 0;
78}
79
80static int plff_init(struct hid_device *hid)
81{
82    struct plff_device *plff;
83    struct hid_report *report;
84    struct hid_input *hidinput;
85    struct list_head *report_list =
86            &hid->report_enum[HID_OUTPUT_REPORT].report_list;
87    struct list_head *report_ptr = report_list;
88    struct input_dev *dev;
89    int error;
90    s32 *strong;
91    s32 *weak;
92
93    /* The device contains one output report per physical device, all
94       containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
95       absolute values.
96
97       The input reports also contain a field which contains
98       8 ff00.0001 usages and 8 boolean values. Their meaning is
99       currently unknown.
100       
101       A version of the 0e8f:0003 exists that has all the values in
102       separate fields and misses the extra input field, thus resembling
103       Zeroplus (hid-zpff) devices.
104    */
105
106    if (list_empty(report_list)) {
107        hid_err(hid, "no output reports found\n");
108        return -ENODEV;
109    }
110
111    list_for_each_entry(hidinput, &hid->inputs, list) {
112
113        report_ptr = report_ptr->next;
114
115        if (report_ptr == report_list) {
116            hid_err(hid, "required output report is missing\n");
117            return -ENODEV;
118        }
119
120        report = list_entry(report_ptr, struct hid_report, list);
121        if (report->maxfield < 1) {
122            hid_err(hid, "no fields in the report\n");
123            return -ENODEV;
124        }
125
126        if (report->field[0]->report_count >= 4) {
127            report->field[0]->value[0] = 0x00;
128            report->field[0]->value[1] = 0x00;
129            strong = &report->field[0]->value[2];
130            weak = &report->field[0]->value[3];
131            debug("detected single-field device");
132        } else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 &&
133                report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) {
134            report->field[0]->value[0] = 0x00;
135            report->field[1]->value[0] = 0x00;
136            strong = &report->field[2]->value[0];
137            weak = &report->field[3]->value[0];
138            debug("detected 4-field device");
139        } else {
140            hid_err(hid, "not enough fields or values\n");
141            return -ENODEV;
142        }
143
144        plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
145        if (!plff)
146            return -ENOMEM;
147
148        dev = hidinput->input;
149
150        set_bit(FF_RUMBLE, dev->ffbit);
151
152        error = input_ff_create_memless(dev, plff, hid_plff_play);
153        if (error) {
154            kfree(plff);
155            return error;
156        }
157
158        plff->report = report;
159        plff->strong = strong;
160        plff->weak = weak;
161
162        *strong = 0x00;
163        *weak = 0x00;
164        usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
165    }
166
167    hid_info(hid, "Force feedback for PantherLord/GreenAsia devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
168
169    return 0;
170}
171#else
172static inline int plff_init(struct hid_device *hid)
173{
174    return 0;
175}
176#endif
177
178static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
179{
180    int ret;
181
182    if (id->driver_data)
183        hdev->quirks |= HID_QUIRK_MULTI_INPUT;
184
185    ret = hid_parse(hdev);
186    if (ret) {
187        hid_err(hdev, "parse failed\n");
188        goto err;
189    }
190
191    ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
192    if (ret) {
193        hid_err(hdev, "hw start failed\n");
194        goto err;
195    }
196
197    plff_init(hdev);
198
199    return 0;
200err:
201    return ret;
202}
203
204static const struct hid_device_id pl_devices[] = {
205    { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR),
206        .driver_data = 1 }, /* Twin USB Joystick */
207    { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR),
208        .driver_data = 1 }, /* Twin USB Joystick */
209    { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), },
210    { }
211};
212MODULE_DEVICE_TABLE(hid, pl_devices);
213
214static struct hid_driver pl_driver = {
215    .name = "pantherlord",
216    .id_table = pl_devices,
217    .probe = pl_probe,
218};
219
220static int __init pl_init(void)
221{
222    return hid_register_driver(&pl_driver);
223}
224
225static void __exit pl_exit(void)
226{
227    hid_unregister_driver(&pl_driver);
228}
229
230module_init(pl_init);
231module_exit(pl_exit);
232MODULE_LICENSE("GPL");
233

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