1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Force feedback support for GreenAsia (Product ID 0x12) based devices 4 * 5 * The devices are distributed under various names and the same USB device ID 6 * can be used in many game controllers. 7 * 8 * 0e8f:0012 "GreenAsia Inc. USB Joystick " 9 * - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635. 10 * 11 * Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info> 12 */ 13 14 /* 15 */ 16 17 #include <linux/input.h> 18 #include <linux/slab.h> 19 #include <linux/hid.h> 20 #include <linux/module.h> 21 #include "hid-ids.h" 22 23 #ifdef CONFIG_GREENASIA_FF 24 25 struct gaff_device { 26 struct hid_report *report; 27 }; 28 29 static int hid_gaff_play(struct input_dev *dev, void *data, 30 struct ff_effect *effect) 31 { 32 struct hid_device *hid = input_get_drvdata(dev); 33 struct gaff_device *gaff = data; 34 int left, right; 35 36 left = effect->u.rumble.strong_magnitude; 37 right = effect->u.rumble.weak_magnitude; 38 39 dbg_hid("called with 0x%04x 0x%04x", left, right); 40 41 left = left * 0xfe / 0xffff; 42 right = right * 0xfe / 0xffff; 43 44 gaff->report->field[0]->value[0] = 0x51; 45 gaff->report->field[0]->value[1] = 0x0; 46 gaff->report->field[0]->value[2] = right; 47 gaff->report->field[0]->value[3] = 0; 48 gaff->report->field[0]->value[4] = left; 49 gaff->report->field[0]->value[5] = 0; 50 dbg_hid("running with 0x%02x 0x%02x", left, right); 51 hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT); 52 53 gaff->report->field[0]->value[0] = 0xfa; 54 gaff->report->field[0]->value[1] = 0xfe; 55 gaff->report->field[0]->value[2] = 0x0; 56 gaff->report->field[0]->value[4] = 0x0; 57 58 hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT); 59 60 return 0; 61 } 62 63 static int gaff_input_configured(struct hid_device *hid, struct hid_input *hidinput) 64 { 65 struct gaff_device *gaff; 66 struct hid_report *report; 67 struct list_head *report_list = 68 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 69 struct input_dev *dev = hidinput->input; 70 int error; 71 72 if (!list_is_first(&hidinput->list, &hid->inputs)) 73 return 0; 74 75 report = list_first_entry_or_null(report_list, struct hid_report, list); 76 if (!report) { 77 hid_err(hid, "no output reports found\n"); 78 return -ENODEV; 79 } 80 if (report->maxfield < 1) { 81 hid_err(hid, "no fields in the report\n"); 82 return -ENODEV; 83 } 84 85 if (report->field[0]->report_count < 6) { 86 hid_err(hid, "not enough values in the field\n"); 87 return -ENODEV; 88 } 89 90 gaff = kzalloc_obj(struct gaff_device); 91 if (!gaff) 92 return -ENOMEM; 93 94 gaff->report = report; 95 set_bit(FF_RUMBLE, dev->ffbit); 96 97 error = input_ff_create_memless(dev, gaff, hid_gaff_play); 98 if (error) { 99 kfree(gaff); 100 return error; 101 } 102 103 gaff->report->field[0]->value[0] = 0x51; 104 gaff->report->field[0]->value[1] = 0x00; 105 gaff->report->field[0]->value[2] = 0x00; 106 gaff->report->field[0]->value[3] = 0x00; 107 hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT); 108 109 gaff->report->field[0]->value[0] = 0xfa; 110 gaff->report->field[0]->value[1] = 0xfe; 111 112 hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT); 113 114 hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n"); 115 116 return 0; 117 } 118 #else 119 static inline int gaff_input_configured(struct hid_device *hdev, 120 struct hid_input *hidinput) 121 { 122 return 0; 123 } 124 #endif 125 126 static const struct hid_device_id ga_devices[] = { 127 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), }, 128 { } 129 }; 130 MODULE_DEVICE_TABLE(hid, ga_devices); 131 132 static struct hid_driver ga_driver = { 133 .name = "greenasia", 134 .id_table = ga_devices, 135 .input_configured = gaff_input_configured, 136 }; 137 module_hid_driver(ga_driver); 138 139 MODULE_DESCRIPTION("Force feedback support for GreenAsia (Product ID 0x12) based devices"); 140 MODULE_LICENSE("GPL"); 141