linux/drivers/hid/hid-pl.c
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   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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