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/slab.h> 32 #include <linux/usb.h> 33 #include <linux/hid.h> 34 #include "hid-ids.h" 35 36 #ifdef CONFIG_GREENASIA_FF 37 #include "usbhid/usbhid.h" 38 39 struct gaff_device { 40 struct hid_report *report; 41 }; 42 43 static int hid_gaff_play(struct input_dev *dev, void *data, 44 struct ff_effect *effect) 45 { 46 struct hid_device *hid = input_get_drvdata(dev); 47 struct gaff_device *gaff = data; 48 int left, right; 49 50 left = effect->u.rumble.strong_magnitude; 51 right = effect->u.rumble.weak_magnitude; 52 53 dbg_hid("called with 0x%04x 0x%04x", left, right); 54 55 left = left * 0xfe / 0xffff; 56 right = right * 0xfe / 0xffff; 57 58 gaff->report->field[0]->value[0] = 0x51; 59 gaff->report->field[0]->value[1] = 0x0; 60 gaff->report->field[0]->value[2] = right; 61 gaff->report->field[0]->value[3] = 0; 62 gaff->report->field[0]->value[4] = left; 63 gaff->report->field[0]->value[5] = 0; 64 dbg_hid("running with 0x%02x 0x%02x", left, right); 65 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 66 67 gaff->report->field[0]->value[0] = 0xfa; 68 gaff->report->field[0]->value[1] = 0xfe; 69 gaff->report->field[0]->value[2] = 0x0; 70 gaff->report->field[0]->value[4] = 0x0; 71 72 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 73 74 return 0; 75 } 76 77 static int gaff_init(struct hid_device *hid) 78 { 79 struct gaff_device *gaff; 80 struct hid_report *report; 81 struct hid_input *hidinput = list_entry(hid->inputs.next, 82 struct hid_input, list); 83 struct list_head *report_list = 84 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 85 struct list_head *report_ptr = report_list; 86 struct input_dev *dev = hidinput->input; 87 int error; 88 89 if (list_empty(report_list)) { 90 hid_err(hid, "no output reports found\n"); 91 return -ENODEV; 92 } 93 94 report_ptr = report_ptr->next; 95 96 report = list_entry(report_ptr, struct hid_report, list); 97 if (report->maxfield < 1) { 98 hid_err(hid, "no fields in the report\n"); 99 return -ENODEV; 100 } 101 102 if (report->field[0]->report_count < 6) { 103 hid_err(hid, "not enough values in the field\n"); 104 return -ENODEV; 105 } 106 107 gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL); 108 if (!gaff) 109 return -ENOMEM; 110 111 set_bit(FF_RUMBLE, dev->ffbit); 112 113 error = input_ff_create_memless(dev, gaff, hid_gaff_play); 114 if (error) { 115 kfree(gaff); 116 return error; 117 } 118 119 gaff->report = report; 120 gaff->report->field[0]->value[0] = 0x51; 121 gaff->report->field[0]->value[1] = 0x00; 122 gaff->report->field[0]->value[2] = 0x00; 123 gaff->report->field[0]->value[3] = 0x00; 124 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 125 126 gaff->report->field[0]->value[0] = 0xfa; 127 gaff->report->field[0]->value[1] = 0xfe; 128 129 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 130 131 hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n"); 132 133 return 0; 134 } 135 #else 136 static inline int gaff_init(struct hid_device *hdev) 137 { 138 return 0; 139 } 140 #endif 141 142 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id) 143 { 144 int ret; 145 146 dev_dbg(&hdev->dev, "Greenasia HID hardware probe..."); 147 148 ret = hid_parse(hdev); 149 if (ret) { 150 hid_err(hdev, "parse failed\n"); 151 goto err; 152 } 153 154 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 155 if (ret) { 156 hid_err(hdev, "hw start failed\n"); 157 goto err; 158 } 159 160 gaff_init(hdev); 161 162 return 0; 163 err: 164 return ret; 165 } 166 167 static const struct hid_device_id ga_devices[] = { 168 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), }, 169 { } 170 }; 171 MODULE_DEVICE_TABLE(hid, ga_devices); 172 173 static struct hid_driver ga_driver = { 174 .name = "greenasia", 175 .id_table = ga_devices, 176 .probe = ga_probe, 177 }; 178 179 static int __init ga_init(void) 180 { 181 return hid_register_driver(&ga_driver); 182 } 183 184 static void __exit ga_exit(void) 185 { 186 hid_unregister_driver(&ga_driver); 187 } 188 189 module_init(ga_init); 190 module_exit(ga_exit); 191 MODULE_LICENSE("GPL"); 192