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 *  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
  52struct plff_device {
  53        struct hid_report *report;
  54        s32 maxval;
  55        s32 *strong;
  56        s32 *weak;
  57};
  58
  59static 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
  81static 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
 184static inline int plff_init(struct hid_device *hid)
 185{
 186        return 0;
 187}
 188#endif
 189
 190static 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;
 212err:
 213        return ret;
 214}
 215
 216static 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};
 225MODULE_DEVICE_TABLE(hid, pl_devices);
 226
 227static struct hid_driver pl_driver = {
 228        .name = "pantherlord",
 229        .id_table = pl_devices,
 230        .probe = pl_probe,
 231};
 232module_hid_driver(pl_driver);
 233
 234MODULE_LICENSE("GPL");
 235
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