drivers/hid/hid-pl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Force feedback support for PantherLord/GreenAsia based devices
   4  *
   5  *  The devices are distributed under various names and the same USB device ID
   6  *  can be used in both adapters and actual game controllers.
   7  *
   8  *  0810:0001 "Twin USB Joystick"
   9  *   - tested with PantherLord USB/PS2 2in1 Adapter
  10  *   - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
  11  *
  12  *  0e8f:0003 "GreenAsia Inc.    USB Joystick     "
  13  *   - tested with König Gaming gamepad
  14  *
  15  *  0e8f:0003 "GASIA USB Gamepad"
  16  *   - another version of the König gamepad
  17  *
  18  *  0f30:0111 "Saitek Color Rumble Pad"
  19  *
  20  *  Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
  21  */
  22
  23 /*
  24  */
  25
  26
  27 /* #define DEBUG */
  28
  29 #define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
  30
  31 #include <linux/input.h>
  32 #include <linux/slab.h>
  33 #include <linux/module.h>
  34 #include <linux/hid.h>
  35
  36 #include "hid-ids.h"
  37
  38 #ifdef CONFIG_PANTHERLORD_FF
  39
  40 struct plff_device {
  41         struct hid_report *report;
  42         s32 maxval;
  43         s32 *strong;
  44         s32 *weak;
  45 };
  46
  47 static int hid_plff_play(struct input_dev *dev, void *data,
  48                          struct ff_effect *effect)
  49 {
  50         struct hid_device *hid = input_get_drvdata(dev);
  51         struct plff_device *plff = data;
  52         int left, right;
  53
  54         left = effect->u.rumble.strong_magnitude;
  55         right = effect->u.rumble.weak_magnitude;
  56         debug("called with 0x%04x 0x%04x", left, right);
  57
  58         left = left * plff->maxval / 0xffff;
  59         right = right * plff->maxval / 0xffff;
  60
  61         *plff->strong = left;
  62         *plff->weak = right;
  63         debug("running with 0x%02x 0x%02x", left, right);
  64         hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
  65
  66         return 0;
  67 }
  68
  69 static int plff_init(struct hid_device *hid)
  70 {
  71         struct plff_device *plff;
  72         struct hid_report *report;
  73         struct hid_input *hidinput;
  74         struct list_head *report_list =
  75                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  76         struct list_head *report_ptr = report_list;
  77         struct input_dev *dev;
  78         int error;
  79         s32 maxval;
  80         s32 *strong;
  81         s32 *weak;
  82
  83         /* The device contains one output report per physical device, all
  84            containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
  85            absolute values.
  86
  87            The input reports also contain a field which contains
  88            8 ff00.0001 usages and 8 boolean values. Their meaning is
  89            currently unknown.
  90
  91            A version of the 0e8f:0003 exists that has all the values in
  92            separate fields and misses the extra input field, thus resembling
  93            Zeroplus (hid-zpff) devices.
  94         */
  95
  96         if (list_empty(report_list)) {
  97                 hid_err(hid, "no output reports found\n");
  98                 return -ENODEV;
  99         }
 100
 101         list_for_each_entry(hidinput, &hid->inputs, list) {
 102
 103                 report_ptr = report_ptr->next;
 104
 105                 if (report_ptr == report_list) {
 106                         hid_err(hid, "required output report is missing\n");
 107                         return -ENODEV;
 108                 }
 109
 110                 report = list_entry(report_ptr, struct hid_report, list);
 111                 if (report->maxfield < 1) {
 112                         hid_err(hid, "no fields in the report\n");
 113                         return -ENODEV;
 114                 }
 115
 116                 maxval = 0x7f;
 117                 if (report->field[0]->report_count >= 4) {
 118                         report->field[0]->value[0] = 0x00;
 119                         report->field[0]->value[1] = 0x00;
 120                         strong = &report->field[0]->value[2];
 121                         weak = &report->field[0]->value[3];
 122                         debug("detected single-field device");
 123                 } else if (report->field[0]->maxusage == 1 &&
 124                            report->field[0]->usage[0].hid ==
 125                                 (HID_UP_LED | 0x43) &&
 126                            report->maxfield >= 4 &&
 127                            report->field[0]->report_count >= 1 &&
 128                            report->field[1]->report_count >= 1 &&
 129                            report->field[2]->report_count >= 1 &&
 130                            report->field[3]->report_count >= 1) {
 131                         report->field[0]->value[0] = 0x00;
 132                         report->field[1]->value[0] = 0x00;
 133                         strong = &report->field[2]->value[0];
 134                         weak = &report->field[3]->value[0];
 135                         if (hid->vendor == USB_VENDOR_ID_JESS2)
 136                                 maxval = 0xff;
 137                         debug("detected 4-field device");
 138                 } else {
 139                         hid_err(hid, "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                 plff->maxval = maxval;
 161
 162                 *strong = 0x00;
 163                 *weak = 0x00;
 164                 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
 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
 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                 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;
 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         { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), },
 211         { }
 212 };
 213 MODULE_DEVICE_TABLE(hid, pl_devices);
 214
 215 static struct hid_driver pl_driver = {
 216         .name = "pantherlord",
 217         .id_table = pl_devices,
 218         .probe = pl_probe,
 219 };
 220 module_hid_driver(pl_driver);
 221
 222 MODULE_LICENSE("GPL");