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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Force feedback support for PantherLord/GreenAsia based devices4 *5 * The devices are distributed under various names and the same USB device ID6 * can be used in both adapters and actual game controllers.7 *8 * 0810:0001 "Twin USB Joystick"9 * - tested with PantherLord USB/PS2 2in1 Adapter10 * - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)11 *12 * 0e8f:0003 "GreenAsia Inc. USB Joystick "13 * - tested with König Gaming gamepad14 *15 * 0e8f:0003 "GASIA USB Gamepad"16 * - another version of the König gamepad17 *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_FF39 40struct plff_device {41 struct hid_report *report;42 s32 maxval;43 s32 *strong;44 s32 *weak;45};46 47static 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 69static 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, all84 containing 1 field, which contains 4 ff00.0002 usages and 4 16bit85 absolute values.86 87 The input reports also contain a field which contains88 8 ff00.0001 usages and 8 boolean values. Their meaning is89 currently unknown.90 91 A version of the 0e8f:0003 exists that has all the values in92 separate fields and misses the extra input field, thus resembling93 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#else172static inline int plff_init(struct hid_device *hid)173{174 return 0;175}176#endif177 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 { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), },211 { }212};213MODULE_DEVICE_TABLE(hid, pl_devices);214 215static struct hid_driver pl_driver = {216 .name = "pantherlord",217 .id_table = pl_devices,218 .probe = pl_probe,219};220module_hid_driver(pl_driver);221 222MODULE_DESCRIPTION("Force feedback support for PantherLord/GreenAsia based devices");223MODULE_LICENSE("GPL");224