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