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Linux/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  *  0f30:0111 "Saitek Color Rumble Pad"
 18  *
 19  *  Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
 20  */
 21 
 22 /*
 23  * This program is free software; you can redistribute it and/or modify
 24  * it under the terms of the GNU General Public License as published by
 25  * the Free Software Foundation; either version 2 of the License, or
 26  * (at your option) any later version.
 27  *
 28  * This program is distributed in the hope that it will be useful,
 29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 31  * GNU General Public License for more details.
 32  *
 33  * You should have received a copy of the GNU General Public License
 34  * along with this program; if not, write to the Free Software
 35  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 36  */
 37 
 38 
 39 /* #define DEBUG */
 40 
 41 #define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
 42 
 43 #include <linux/input.h>
 44 #include <linux/slab.h>
 45 #include <linux/module.h>
 46 #include <linux/hid.h>
 47 
 48 #include "hid-ids.h"
 49 
 50 #ifdef CONFIG_PANTHERLORD_FF
 51 
 52 struct plff_device {
 53         struct hid_report *report;
 54         s32 maxval;
 55         s32 *strong;
 56         s32 *weak;
 57 };
 58 
 59 static int hid_plff_play(struct input_dev *dev, void *data,
 60                          struct ff_effect *effect)
 61 {
 62         struct hid_device *hid = input_get_drvdata(dev);
 63         struct plff_device *plff = data;
 64         int left, right;
 65 
 66         left = effect->u.rumble.strong_magnitude;
 67         right = effect->u.rumble.weak_magnitude;
 68         debug("called with 0x%04x 0x%04x", left, right);
 69 
 70         left = left * plff->maxval / 0xffff;
 71         right = right * plff->maxval / 0xffff;
 72 
 73         *plff->strong = left;
 74         *plff->weak = right;
 75         debug("running with 0x%02x 0x%02x", left, right);
 76         hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
 77 
 78         return 0;
 79 }
 80 
 81 static int plff_init(struct hid_device *hid)
 82 {
 83         struct plff_device *plff;
 84         struct hid_report *report;
 85         struct hid_input *hidinput;
 86         struct list_head *report_list =
 87                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
 88         struct list_head *report_ptr = report_list;
 89         struct input_dev *dev;
 90         int error;
 91         s32 maxval;
 92         s32 *strong;
 93         s32 *weak;
 94 
 95         /* The device contains one output report per physical device, all
 96            containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
 97            absolute values.
 98 
 99            The input reports also contain a field which contains
100            8 ff00.0001 usages and 8 boolean values. Their meaning is
101            currently unknown.
102            
103            A version of the 0e8f:0003 exists that has all the values in
104            separate fields and misses the extra input field, thus resembling
105            Zeroplus (hid-zpff) devices.
106         */
107 
108         if (list_empty(report_list)) {
109                 hid_err(hid, "no output reports found\n");
110                 return -ENODEV;
111         }
112 
113         list_for_each_entry(hidinput, &hid->inputs, list) {
114 
115                 report_ptr = report_ptr->next;
116 
117                 if (report_ptr == report_list) {
118                         hid_err(hid, "required output report is missing\n");
119                         return -ENODEV;
120                 }
121 
122                 report = list_entry(report_ptr, struct hid_report, list);
123                 if (report->maxfield < 1) {
124                         hid_err(hid, "no fields in the report\n");
125                         return -ENODEV;
126                 }
127 
128                 maxval = 0x7f;
129                 if (report->field[0]->report_count >= 4) {
130                         report->field[0]->value[0] = 0x00;
131                         report->field[0]->value[1] = 0x00;
132                         strong = &report->field[0]->value[2];
133                         weak = &report->field[0]->value[3];
134                         debug("detected single-field device");
135                 } else if (report->field[0]->maxusage == 1 &&
136                            report->field[0]->usage[0].hid ==
137                                 (HID_UP_LED | 0x43) &&
138                            report->maxfield >= 4 &&
139                            report->field[0]->report_count >= 1 &&
140                            report->field[1]->report_count >= 1 &&
141                            report->field[2]->report_count >= 1 &&
142                            report->field[3]->report_count >= 1) {
143                         report->field[0]->value[0] = 0x00;
144                         report->field[1]->value[0] = 0x00;
145                         strong = &report->field[2]->value[0];
146                         weak = &report->field[3]->value[0];
147                         if (hid->vendor == USB_VENDOR_ID_JESS2)
148                                 maxval = 0xff;
149                         debug("detected 4-field device");
150                 } else {
151                         hid_err(hid, "not enough fields or values\n");
152                         return -ENODEV;
153                 }
154 
155                 plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
156                 if (!plff)
157                         return -ENOMEM;
158 
159                 dev = hidinput->input;
160 
161                 set_bit(FF_RUMBLE, dev->ffbit);
162 
163                 error = input_ff_create_memless(dev, plff, hid_plff_play);
164                 if (error) {
165                         kfree(plff);
166                         return error;
167                 }
168 
169                 plff->report = report;
170                 plff->strong = strong;
171                 plff->weak = weak;
172                 plff->maxval = maxval;
173 
174                 *strong = 0x00;
175                 *weak = 0x00;
176                 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
177         }
178 
179         hid_info(hid, "Force feedback for PantherLord/GreenAsia devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
180 
181         return 0;
182 }
183 #else
184 static inline int plff_init(struct hid_device *hid)
185 {
186         return 0;
187 }
188 #endif
189 
190 static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
191 {
192         int ret;
193 
194         if (id->driver_data)
195                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
196 
197         ret = hid_parse(hdev);
198         if (ret) {
199                 hid_err(hdev, "parse failed\n");
200                 goto err;
201         }
202 
203         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
204         if (ret) {
205                 hid_err(hdev, "hw start failed\n");
206                 goto err;
207         }
208 
209         plff_init(hdev);
210 
211         return 0;
212 err:
213         return ret;
214 }
215 
216 static const struct hid_device_id pl_devices[] = {
217         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR),
218                 .driver_data = 1 }, /* Twin USB Joystick */
219         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR),
220                 .driver_data = 1 }, /* Twin USB Joystick */
221         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), },
222         { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), },
223         { }
224 };
225 MODULE_DEVICE_TABLE(hid, pl_devices);
226 
227 static struct hid_driver pl_driver = {
228         .name = "pantherlord",
229         .id_table = pl_devices,
230         .probe = pl_probe,
231 };
232 module_hid_driver(pl_driver);
233 
234 MODULE_LICENSE("GPL");
235 

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