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 #include <linux/input.h> 28 #include <linux/slab.h> 29 #include <linux/module.h> 30 #include <linux/hid.h> 31 32 #include "hid-ids.h" 33 34 #ifdef CONFIG_PANTHERLORD_FF 35 36 struct plff_device { 37 struct hid_report *report; 38 s32 maxval; 39 s32 *strong; 40 s32 *weak; 41 }; 42 43 static int hid_plff_play(struct input_dev *dev, void *data, 44 struct ff_effect *effect) 45 { 46 struct hid_device *hid = input_get_drvdata(dev); 47 struct plff_device *plff = data; 48 int left, right; 49 50 left = effect->u.rumble.strong_magnitude; 51 right = effect->u.rumble.weak_magnitude; 52 hid_dbg(dev, "called with 0x%04x 0x%04x", left, right); 53 54 left = left * plff->maxval / 0xffff; 55 right = right * plff->maxval / 0xffff; 56 57 *plff->strong = left; 58 *plff->weak = right; 59 hid_dbg(dev, "running with 0x%02x 0x%02x", left, right); 60 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT); 61 62 return 0; 63 } 64 65 static int pl_input_configured(struct hid_device *hid, struct hid_input *hidinput) 66 { 67 struct plff_device *plff; 68 struct hid_report *report; 69 struct list_head *report_list = 70 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 71 struct input_dev *dev = hidinput->input; 72 int error; 73 s32 maxval; 74 s32 *strong; 75 s32 *weak; 76 77 /* The device contains one output report per physical device, all 78 containing 1 field, which contains 4 ff00.0002 usages and 4 16bit 79 absolute values. 80 81 The input reports also contain a field which contains 82 8 ff00.0001 usages and 8 boolean values. Their meaning is 83 currently unknown. 84 85 A version of the 0e8f:0003 exists that has all the values in 86 separate fields and misses the extra input field, thus resembling 87 Zeroplus (hid-zpff) devices. 88 */ 89 90 if (!list_is_first(&hidinput->list, &hid->inputs)) 91 return 0; 92 93 report = list_first_entry_or_null(report_list, struct hid_report, list); 94 if (!report) { 95 hid_err(hid, "no output reports found\n"); 96 return -ENODEV; 97 } 98 if (report->maxfield < 1) { 99 hid_err(hid, "no fields in the report\n"); 100 return -ENODEV; 101 } 102 103 maxval = 0x7f; 104 if (report->field[0]->report_count >= 4) { 105 report->field[0]->value[0] = 0x00; 106 report->field[0]->value[1] = 0x00; 107 strong = &report->field[0]->value[2]; 108 weak = &report->field[0]->value[3]; 109 hid_dbg(hid, "detected single-field device"); 110 } else if (report->field[0]->maxusage == 1 && 111 report->field[0]->usage[0].hid == 112 (HID_UP_LED | 0x43) && 113 report->maxfield >= 4 && 114 report->field[0]->report_count >= 1 && 115 report->field[1]->report_count >= 1 && 116 report->field[2]->report_count >= 1 && 117 report->field[3]->report_count >= 1) { 118 report->field[0]->value[0] = 0x00; 119 report->field[1]->value[0] = 0x00; 120 strong = &report->field[2]->value[0]; 121 weak = &report->field[3]->value[0]; 122 if (hid->vendor == USB_VENDOR_ID_JESS2) 123 maxval = 0xff; 124 hid_dbg(hid, "detected 4-field device"); 125 } else { 126 hid_err(hid, "not enough fields or values\n"); 127 return -ENODEV; 128 } 129 130 plff = kzalloc_obj(struct plff_device); 131 if (!plff) 132 return -ENOMEM; 133 134 dev = hidinput->input; 135 136 set_bit(FF_RUMBLE, dev->ffbit); 137 138 error = input_ff_create_memless(dev, plff, hid_plff_play); 139 if (error) { 140 kfree(plff); 141 return error; 142 } 143 144 plff->report = report; 145 plff->strong = strong; 146 plff->weak = weak; 147 plff->maxval = maxval; 148 149 *strong = 0x00; 150 *weak = 0x00; 151 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT); 152 153 return 0; 154 } 155 #else 156 static inline int pl_input_configured(struct hid_device *hid, 157 struct hid_input *hidinput) 158 { 159 return 0; 160 } 161 #endif 162 163 static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id) 164 { 165 int ret; 166 167 if (id->driver_data) 168 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 169 170 ret = hid_parse(hdev); 171 if (ret) { 172 hid_err(hdev, "parse failed\n"); 173 return ret; 174 } 175 176 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 177 if (ret) { 178 hid_err(hdev, "hw start failed\n"); 179 return ret; 180 } 181 182 return 0; 183 } 184 static const struct hid_device_id pl_devices[] = { 185 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR), 186 .driver_data = 1 }, /* Twin USB Joystick */ 187 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR), 188 .driver_data = 1 }, /* Twin USB Joystick */ 189 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), }, 190 { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), }, 191 { } 192 }; 193 MODULE_DEVICE_TABLE(hid, pl_devices); 194 195 static struct hid_driver pl_driver = { 196 .name = "pantherlord", 197 .id_table = pl_devices, 198 .probe = pl_probe, 199 .input_configured = pl_input_configured, 200 }; 201 module_hid_driver(pl_driver); 202 203 MODULE_DESCRIPTION("Force feedback support for PantherLord/GreenAsia based devices"); 204 MODULE_LICENSE("GPL"); 205