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 <linux/module.h> 35 #include "hid-ids.h" 36 37 #ifdef CONFIG_GREENASIA_FF 38 #include "usbhid/usbhid.h" 39 40 struct gaff_device { 41 struct hid_report *report; 42 }; 43 44 static int hid_gaff_play(struct input_dev *dev, void *data, 45 struct ff_effect *effect) 46 { 47 struct hid_device *hid = input_get_drvdata(dev); 48 struct gaff_device *gaff = data; 49 int left, right; 50 51 left = effect->u.rumble.strong_magnitude; 52 right = effect->u.rumble.weak_magnitude; 53 54 dbg_hid("called with 0x%04x 0x%04x", left, right); 55 56 left = left * 0xfe / 0xffff; 57 right = right * 0xfe / 0xffff; 58 59 gaff->report->field[0]->value[0] = 0x51; 60 gaff->report->field[0]->value[1] = 0x0; 61 gaff->report->field[0]->value[2] = right; 62 gaff->report->field[0]->value[3] = 0; 63 gaff->report->field[0]->value[4] = left; 64 gaff->report->field[0]->value[5] = 0; 65 dbg_hid("running with 0x%02x 0x%02x", left, right); 66 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 67 68 gaff->report->field[0]->value[0] = 0xfa; 69 gaff->report->field[0]->value[1] = 0xfe; 70 gaff->report->field[0]->value[2] = 0x0; 71 gaff->report->field[0]->value[4] = 0x0; 72 73 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 74 75 return 0; 76 } 77 78 static int gaff_init(struct hid_device *hid) 79 { 80 struct gaff_device *gaff; 81 struct hid_report *report; 82 struct hid_input *hidinput = list_entry(hid->inputs.next, 83 struct hid_input, list); 84 struct list_head *report_list = 85 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 86 struct list_head *report_ptr = report_list; 87 struct input_dev *dev = hidinput->input; 88 int error; 89 90 if (list_empty(report_list)) { 91 hid_err(hid, "no output reports found\n"); 92 return -ENODEV; 93 } 94 95 report_ptr = report_ptr->next; 96 97 report = list_entry(report_ptr, struct hid_report, list); 98 if (report->maxfield < 1) { 99 hid_err(hid, "no fields in the report\n"); 100 return -ENODEV; 101 } 102 103 if (report->field[0]->report_count < 6) { 104 hid_err(hid, "not enough values in the field\n"); 105 return -ENODEV; 106 } 107 108 gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL); 109 if (!gaff) 110 return -ENOMEM; 111 112 set_bit(FF_RUMBLE, dev->ffbit); 113 114 error = input_ff_create_memless(dev, gaff, hid_gaff_play); 115 if (error) { 116 kfree(gaff); 117 return error; 118 } 119 120 gaff->report = report; 121 gaff->report->field[0]->value[0] = 0x51; 122 gaff->report->field[0]->value[1] = 0x00; 123 gaff->report->field[0]->value[2] = 0x00; 124 gaff->report->field[0]->value[3] = 0x00; 125 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 126 127 gaff->report->field[0]->value[0] = 0xfa; 128 gaff->report->field[0]->value[1] = 0xfe; 129 130 usbhid_submit_report(hid, gaff->report, USB_DIR_OUT); 131 132 hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n"); 133 134 return 0; 135 } 136 #else 137 static inline int gaff_init(struct hid_device *hdev) 138 { 139 return 0; 140 } 141 #endif 142 143 static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id) 144 { 145 int ret; 146 147 dev_dbg(&hdev->dev, "Greenasia HID hardware probe..."); 148 149 ret = hid_parse(hdev); 150 if (ret) { 151 hid_err(hdev, "parse failed\n"); 152 goto err; 153 } 154 155 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 156 if (ret) { 157 hid_err(hdev, "hw start failed\n"); 158 goto err; 159 } 160 161 gaff_init(hdev); 162 163 return 0; 164 err: 165 return ret; 166 } 167 168 static const struct hid_device_id ga_devices[] = { 169 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), }, 170 { } 171 }; 172 MODULE_DEVICE_TABLE(hid, ga_devices); 173 174 static struct hid_driver ga_driver = { 175 .name = "greenasia", 176 .id_table = ga_devices, 177 .probe = ga_probe, 178 }; 179 180 static int __init ga_init(void) 181 { 182 return hid_register_driver(&ga_driver); 183 } 184 185 static void __exit ga_exit(void) 186 { 187 hid_unregister_driver(&ga_driver); 188 } 189 190 module_init(ga_init); 191 module_exit(ga_exit); 192 MODULE_LICENSE("GPL"); 193