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/usb.h>
  43 #include <linux/hid.h>
  44
  45 #include "hid-ids.h"
  46
  47 #ifdef CONFIG_PANTHERLORD_FF
  48 #include "usbhid/usbhid.h"
  49
  50 struct plff_device {
  51         struct hid_report *report;
  52         s32 *strong;
  53         s32 *weak;
  54 };
  55
  56 static int hid_plff_play(struct input_dev *dev, void *data,
  57                          struct ff_effect *effect)
  58 {
  59         struct hid_device *hid = input_get_drvdata(dev);
  60         struct plff_device *plff = data;
  61         int left, right;
  62
  63         left = effect->u.rumble.strong_magnitude;
  64         right = effect->u.rumble.weak_magnitude;
  65         debug("called with 0x%04x 0x%04x", left, right);
  66
  67         left = left * 0x7f / 0xffff;
  68         right = right * 0x7f / 0xffff;
  69
  70         *plff->strong = left;
  71         *plff->weak = right;
  72         debug("running with 0x%02x 0x%02x", left, right);
  73         usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
  74
  75         return 0;
  76 }
  77
  78 static int plff_init(struct hid_device *hid)
  79 {
  80         struct plff_device *plff;
  81         struct hid_report *report;
  82         struct hid_input *hidinput;
  83         struct list_head *report_list =
  84                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  85         struct list_head *report_ptr = report_list;
  86         struct input_dev *dev;
  87         int error;
  88         s32 *strong;
  89         s32 *weak;
  90
  91         /* The device contains one output report per physical device, all
  92            containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
  93            absolute values.
  94
  95            The input reports also contain a field which contains
  96            8 ff00.0001 usages and 8 boolean values. Their meaning is
  97            currently unknown.
  98
  99            A version of the 0e8f:0003 exists that has all the values in
 100            separate fields and misses the extra input field, thus resembling
 101            Zeroplus (hid-zpff) devices.
 102         */
 103
 104         if (list_empty(report_list)) {
 105                 dev_err(&hid->dev, "no output reports found\n");
 106                 return -ENODEV;
 107         }
 108
 109         list_for_each_entry(hidinput, &hid->inputs, list) {
 110
 111                 report_ptr = report_ptr->next;
 112
 113                 if (report_ptr == report_list) {
 114                         dev_err(&hid->dev, "required output report is "
 115                                         "missing\n");
 116                         return -ENODEV;
 117                 }
 118
 119                 report = list_entry(report_ptr, struct hid_report, list);
 120                 if (report->maxfield < 1) {
 121                         dev_err(&hid->dev, "no fields in the report\n");
 122                         return -ENODEV;
 123                 }
 124
 125                 if (report->field[0]->report_count >= 4) {
 126                         report->field[0]->value[0] = 0x00;
 127                         report->field[0]->value[1] = 0x00;
 128                         strong = &report->field[0]->value[2];
 129                         weak = &report->field[0]->value[3];
 130                         debug("detected single-field device");
 131                 } else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 &&
 132                                 report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) {
 133                         report->field[0]->value[0] = 0x00;
 134                         report->field[1]->value[0] = 0x00;
 135                         strong = &report->field[2]->value[0];
 136                         weak = &report->field[3]->value[0];
 137                         debug("detected 4-field device");
 138                 } else {
 139                         dev_err(&hid->dev, "not enough fields or values\n");
 140                         return -ENODEV;
 141                 }
 142
 143                 plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
 144                 if (!plff)
 145                         return -ENOMEM;
 146
 147                 dev = hidinput->input;
 148
 149                 set_bit(FF_RUMBLE, dev->ffbit);
 150
 151                 error = input_ff_create_memless(dev, plff, hid_plff_play);
 152                 if (error) {
 153                         kfree(plff);
 154                         return error;
 155                 }
 156
 157                 plff->report = report;
 158                 plff->strong = strong;
 159                 plff->weak = weak;
 160
 161                 *strong = 0x00;
 162                 *weak = 0x00;
 163                 usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
 164         }
 165
 166         dev_info(&hid->dev, "Force feedback for PantherLord/GreenAsia "
 167                "devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
 168
 169         return 0;
 170 }
 171 #else
 172 static inline int plff_init(struct hid_device *hid)
 173 {
 174         return 0;
 175 }
 176 #endif
 177
 178 static 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                 dev_err(&hdev->dev, "parse failed\n");
 188                 goto err;
 189         }
 190
 191         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 192         if (ret) {
 193                 dev_err(&hdev->dev, "hw start failed\n");
 194                 goto err;
 195         }
 196
 197         plff_init(hdev);
 198
 199         return 0;
 200 err:
 201         return ret;
 202 }
 203
 204 static 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 };
 212 MODULE_DEVICE_TABLE(hid, pl_devices);
 213
 214 static struct hid_driver pl_driver = {
 215         .name = "pantherlord",
 216         .id_table = pl_devices,
 217         .probe = pl_probe,
 218 };
 219
 220 static int __init pl_init(void)
 221 {
 222         return hid_register_driver(&pl_driver);
 223 }
 224
 225 static void __exit pl_exit(void)
 226 {
 227         hid_unregister_driver(&pl_driver);
 228 }
 229
 230 module_init(pl_init);
 231 module_exit(pl_exit);
 232 MODULE_LICENSE("GPL");