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 plff_init(struct hid_device *hid) 66 { 67 struct plff_device *plff; 68 struct hid_report *report; 69 struct hid_input *hidinput; 70 struct list_head *report_list = 71 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 72 struct list_head *report_ptr = report_list; 73 struct input_dev *dev; 74 int error; 75 s32 maxval; 76 s32 *strong; 77 s32 *weak; 78 79 /* The device contains one output report per physical device, all 80 containing 1 field, which contains 4 ff00.0002 usages and 4 16bit 81 absolute values. 82 83 The input reports also contain a field which contains 84 8 ff00.0001 usages and 8 boolean values. Their meaning is 85 currently unknown. 86 87 A version of the 0e8f:0003 exists that has all the values in 88 separate fields and misses the extra input field, thus resembling 89 Zeroplus (hid-zpff) devices. 90 */ 91 92 if (list_empty(report_list)) { 93 hid_err(hid, "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 hid_err(hid, "required output report is missing\n"); 103 return -ENODEV; 104 } 105 106 report = list_entry(report_ptr, struct hid_report, list); 107 if (report->maxfield < 1) { 108 hid_err(hid, "no fields in the report\n"); 109 return -ENODEV; 110 } 111 112 maxval = 0x7f; 113 if (report->field[0]->report_count >= 4) { 114 report->field[0]->value[0] = 0x00; 115 report->field[0]->value[1] = 0x00; 116 strong = &report->field[0]->value[2]; 117 weak = &report->field[0]->value[3]; 118 hid_dbg(hid, "detected single-field device"); 119 } else if (report->field[0]->maxusage == 1 && 120 report->field[0]->usage[0].hid == 121 (HID_UP_LED | 0x43) && 122 report->maxfield >= 4 && 123 report->field[0]->report_count >= 1 && 124 report->field[1]->report_count >= 1 && 125 report->field[2]->report_count >= 1 && 126 report->field[3]->report_count >= 1) { 127 report->field[0]->value[0] = 0x00; 128 report->field[1]->value[0] = 0x00; 129 strong = &report->field[2]->value[0]; 130 weak = &report->field[3]->value[0]; 131 if (hid->vendor == USB_VENDOR_ID_JESS2) 132 maxval = 0xff; 133 hid_dbg(hid, "detected 4-field device"); 134 } else { 135 hid_err(hid, "not enough fields or values\n"); 136 return -ENODEV; 137 } 138 139 plff = kzalloc_obj(struct plff_device); 140 if (!plff) 141 return -ENOMEM; 142 143 dev = hidinput->input; 144 145 set_bit(FF_RUMBLE, dev->ffbit); 146 147 error = input_ff_create_memless(dev, plff, hid_plff_play); 148 if (error) { 149 kfree(plff); 150 return error; 151 } 152 153 plff->report = report; 154 plff->strong = strong; 155 plff->weak = weak; 156 plff->maxval = maxval; 157 158 *strong = 0x00; 159 *weak = 0x00; 160 hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT); 161 } 162 163 hid_info(hid, "Force feedback for PantherLord/GreenAsia devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); 164 165 return 0; 166 } 167 #else 168 static inline int plff_init(struct hid_device *hid) 169 { 170 return 0; 171 } 172 #endif 173 174 static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id) 175 { 176 int ret; 177 178 if (id->driver_data) 179 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 180 181 ret = hid_parse(hdev); 182 if (ret) { 183 hid_err(hdev, "parse failed\n"); 184 goto err; 185 } 186 187 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 188 if (ret) { 189 hid_err(hdev, "hw start failed\n"); 190 goto err; 191 } 192 193 ret = plff_init(hdev); 194 if (ret) 195 goto stop; 196 197 return 0; 198 199 stop: 200 hid_hw_stop(hdev); 201 err: 202 return ret; 203 } 204 205 static const struct hid_device_id pl_devices[] = { 206 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR), 207 .driver_data = 1 }, /* Twin USB Joystick */ 208 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR), 209 .driver_data = 1 }, /* Twin USB Joystick */ 210 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), }, 211 { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), }, 212 { } 213 }; 214 MODULE_DEVICE_TABLE(hid, pl_devices); 215 216 static struct hid_driver pl_driver = { 217 .name = "pantherlord", 218 .id_table = pl_devices, 219 .probe = pl_probe, 220 }; 221 module_hid_driver(pl_driver); 222 223 MODULE_DESCRIPTION("Force feedback support for PantherLord/GreenAsia based devices"); 224 MODULE_LICENSE("GPL"); 225