drivers/hid/hid-gaff.c

   1 /*
   2  *  Force feedback support for GreenAsia (Product ID 0x12) based devices
   3  *
   4  *  The devices are distributed under various names and the same USB device ID
   5  *  can be used in many game controllers.
   6  *
   7  *
   8  *  0e8f:0012 "GreenAsia Inc.    USB Joystick     "
   9  *   - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635.
  10  *
  11  *  Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  */
  29
  30 #include <linux/input.h>
  31 #include <linux/slab.h>
  32 #include <linux/usb.h>
  33 #include <linux/hid.h>
  34 #include <linux/module.h>
  35 #include "hid-ids.h"
  36
  37 #ifdef CONFIG_GREENASIA_FF
  38 #include "usbhid/usbhid.h"
  39
  40 struct gaff_device {
  41         struct hid_report *report;
  42 };
  43
  44 static int hid_gaff_play(struct input_dev *dev, void *data,
  45                          struct ff_effect *effect)
  46 {
  47         struct hid_device *hid = input_get_drvdata(dev);
  48         struct gaff_device *gaff = data;
  49         int left, right;
  50
  51         left = effect->u.rumble.strong_magnitude;
  52         right = effect->u.rumble.weak_magnitude;
  53
  54         dbg_hid("called with 0x%04x 0x%04x", left, right);
  55
  56         left = left * 0xfe / 0xffff;
  57         right = right * 0xfe / 0xffff;
  58
  59         gaff->report->field[0]->value[0] = 0x51;
  60         gaff->report->field[0]->value[1] = 0x0;
  61         gaff->report->field[0]->value[2] = right;
  62         gaff->report->field[0]->value[3] = 0;
  63         gaff->report->field[0]->value[4] = left;
  64         gaff->report->field[0]->value[5] = 0;
  65         dbg_hid("running with 0x%02x 0x%02x", left, right);
  66         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
  67
  68         gaff->report->field[0]->value[0] = 0xfa;
  69         gaff->report->field[0]->value[1] = 0xfe;
  70         gaff->report->field[0]->value[2] = 0x0;
  71         gaff->report->field[0]->value[4] = 0x0;
  72
  73         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
  74
  75         return 0;
  76 }
  77
  78 static int gaff_init(struct hid_device *hid)
  79 {
  80         struct gaff_device *gaff;
  81         struct hid_report *report;
  82         struct hid_input *hidinput = list_entry(hid->inputs.next,
  83                                                 struct hid_input, list);
  84         struct list_head *report_list =
  85                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  86         struct list_head *report_ptr = report_list;
  87         struct input_dev *dev = hidinput->input;
  88         int error;
  89
  90         if (list_empty(report_list)) {
  91                 hid_err(hid, "no output reports found\n");
  92                 return -ENODEV;
  93         }
  94
  95         report_ptr = report_ptr->next;
  96
  97         report = list_entry(report_ptr, struct hid_report, list);
  98         if (report->maxfield < 1) {
  99                 hid_err(hid, "no fields in the report\n");
 100                 return -ENODEV;
 101         }
 102
 103         if (report->field[0]->report_count < 6) {
 104                 hid_err(hid, "not enough values in the field\n");
 105                 return -ENODEV;
 106         }
 107
 108         gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
 109         if (!gaff)
 110                 return -ENOMEM;
 111
 112         set_bit(FF_RUMBLE, dev->ffbit);
 113
 114         error = input_ff_create_memless(dev, gaff, hid_gaff_play);
 115         if (error) {
 116                 kfree(gaff);
 117                 return error;
 118         }
 119
 120         gaff->report = report;
 121         gaff->report->field[0]->value[0] = 0x51;
 122         gaff->report->field[0]->value[1] = 0x00;
 123         gaff->report->field[0]->value[2] = 0x00;
 124         gaff->report->field[0]->value[3] = 0x00;
 125         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
 126
 127         gaff->report->field[0]->value[0] = 0xfa;
 128         gaff->report->field[0]->value[1] = 0xfe;
 129
 130         usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
 131
 132         hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
 133
 134         return 0;
 135 }
 136 #else
 137 static inline int gaff_init(struct hid_device *hdev)
 138 {
 139         return 0;
 140 }
 141 #endif
 142
 143 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
 144 {
 145         int ret;
 146
 147         dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
 148
 149         ret = hid_parse(hdev);
 150         if (ret) {
 151                 hid_err(hdev, "parse failed\n");
 152                 goto err;
 153         }
 154
 155         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 156         if (ret) {
 157                 hid_err(hdev, "hw start failed\n");
 158                 goto err;
 159         }
 160
 161         gaff_init(hdev);
 162
 163         return 0;
 164 err:
 165         return ret;
 166 }
 167
 168 static const struct hid_device_id ga_devices[] = {
 169         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012),  },
 170         { }
 171 };
 172 MODULE_DEVICE_TABLE(hid, ga_devices);
 173
 174 static struct hid_driver ga_driver = {
 175         .name = "greenasia",
 176         .id_table = ga_devices,
 177         .probe = ga_probe,
 178 };
 179
 180 static int __init ga_init(void)
 181 {
 182         return hid_register_driver(&ga_driver);
 183 }
 184
 185 static void __exit ga_exit(void)
 186 {
 187         hid_unregister_driver(&ga_driver);
 188 }
 189
 190 module_init(ga_init);
 191 module_exit(ga_exit);
 192 MODULE_LICENSE("GPL");