1 /* 2 * Force feedback support for GreenAsia (Product ID 0x12) based devices 3 * 4 * The devices are distributed under various names and the same USB device ID 5 * can be used in many game controllers. 6 * 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 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 28 */ 29 30 #include <linux/input.h> 31 #include <linux/usb.h> 32 #include <linux/hid.h> 33 #include "hid-ids.h" 34 #include "usbhid/usbhid.h" 35 36 struct gaff_device { 37 struct hid_report *report; 38 }; 39 40 static int hid_gaff_play(struct input_dev *dev, void *data, 41 struct ff_effect *effect) 42 { 43 struct hid_device *hid = input_get_drvdata(dev); 44 struct gaff_device *gaff = data; 45 int left, right; 46 47 left = effect->u.rumble.strong_magnitude; 48 right = effect->u.rumble.weak_magnitude; 49 50 dbg_hid("called with 0x%04x 0x%04x", left, right); 51 52 left = left * 0xfe / 0xffff; 53 right = right * 0xfe / 0xffff; 54 55 gaff->report->field[0]->value[0] = 0x51; 56 gaff->report->field[0]->value[1] = 0x0; 57 gaff->report->field[0]->value[2] = right; 58 gaff->report->field[0]->value[3] = 0; 59 gaff->report->field[0]->value[4] = left; 60 gaff->report->field[0]->value[5] = 0; 61 dbg_hid("running with 0x%02x 0x%02x", left, right); 62 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 63 64 gaff->report->field[0]->value[0] = 0xfa; 65 gaff->report->field[0]->value[1] = 0xfe; 66 gaff->report->field[0]->value[2] = 0x0; 67 gaff->report->field[0]->value[4] = 0x0; 68 69 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 70 71 return 0; 72 } 73 74 static int gaff_init(struct hid_device *hid) 75 { 76 struct gaff_device *gaff; 77 struct hid_report *report; 78 struct hid_input *hidinput = list_entry(hid->inputs.next, 79 struct hid_input, list); 80 struct list_head *report_list = 81 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 82 struct list_head *report_ptr = report_list; 83 struct input_dev *dev = hidinput->input; 84 int error; 85 86 if (list_empty(report_list)) { 87 dev_err(&hid->dev, "no output reports found\n"); 88 return -ENODEV; 89 } 90 91 report_ptr = report_ptr->next; 92 93 report = list_entry(report_ptr, struct hid_report, list); 94 if (report->maxfield < 1) { 95 dev_err(&hid->dev, "no fields in the report\n"); 96 return -ENODEV; 97 } 98 99 if (report->field[0]->report_count < 6) { 100 dev_err(&hid->dev, "not enough values in the field\n"); 101 return -ENODEV; 102 } 103 104 gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL); 105 if (!gaff) 106 return -ENOMEM; 107 108 set_bit(FF_RUMBLE, dev->ffbit); 109 110 error = input_ff_create_memless(dev, gaff, hid_gaff_play); 111 if (error) { 112 kfree(gaff); 113 return error; 114 } 115 116 gaff->report = report; 117 gaff->report->field[0]->value[0] = 0x51; 118 gaff->report->field[0]->value[1] = 0x00; 119 gaff->report->field[0]->value[2] = 0x00; 120 gaff->report->field[0]->value[3] = 0x00; 121 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 122 123 gaff->report->field[0]->value[0] = 0xfa; 124 gaff->report->field[0]->value[1] = 0xfe; 125 126 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 127 128 dev_info(&hid->dev, "Force Feedback for GreenAsia 0x12" 129 " devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n"); 130 131 return 0; 132 } 133 134 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id) 135 { 136 int ret; 137 138 dev_dbg(&hdev->dev, "Greenasia HID hardware probe..."); 139 140 ret = hid_parse(hdev); 141 if (ret) { 142 dev_err(&hdev->dev, "parse failed\n"); 143 goto err; 144 } 145 146 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 147 if (ret) { 148 dev_err(&hdev->dev, "hw start failed\n"); 149 goto err; 150 } 151 152 gaff_init(hdev); 153 154 return 0; 155 err: 156 return ret; 157 } 158 159 static const struct hid_device_id ga_devices[] = { 160 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), }, 161 { } 162 }; 163 MODULE_DEVICE_TABLE(hid, ga_devices); 164 165 static struct hid_driver ga_driver = { 166 .name = "greenasia", 167 .id_table = ga_devices, 168 .probe = ga_probe, 169 }; 170 171 static int __init ga_init(void) 172 { 173 return hid_register_driver(&ga_driver); 174 } 175 176 static void __exit ga_exit(void) 177 { 178 hid_unregister_driver(&ga_driver); 179 } 180 181 module_init(ga_init); 182 module_exit(ga_exit); 183 MODULE_LICENSE("GPL"); 184