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