1/* 2 * Force feedback support for DragonRise Inc. game controllers 3 * 4 * From what I have gathered, these devices are mass produced in China and are 5 * distributed under several vendors. They often share the same design as 6 * the original PlayStation DualShock controller. 7 * 8 * 0079:0006 "DragonRise Inc. Generic USB Joystick " 9 * - tested with a Tesun USB-703 game controller. 10 * 11 * Copyright (c) 2009 Richard Walmsley <richwalm@gmail.com> 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 35#include "hid-ids.h" 36 37#ifdef CONFIG_DRAGONRISE_FF 38#include "usbhid/usbhid.h" 39 40struct drff_device { 41 struct hid_report *report; 42}; 43 44static int drff_play(struct input_dev *dev, void *data, 45 struct ff_effect *effect) 46{ 47 struct hid_device *hid = input_get_drvdata(dev); 48 struct drff_device *drff = data; 49 int strong, weak; 50 51 strong = effect->u.rumble.strong_magnitude; 52 weak = effect->u.rumble.weak_magnitude; 53 54 dbg_hid("called with 0x%04x 0x%04x", strong, weak); 55 56 if (strong || weak) { 57 strong = strong * 0xff / 0xffff; 58 weak = weak * 0xff / 0xffff; 59 60 /* While reverse engineering this device, I found that when 61 this value is set, it causes the strong rumble to function 62 at a near maximum speed, so we'll bypass it. */ 63 if (weak == 0x0a) 64 weak = 0x0b; 65 66 drff->report->field[0]->value[0] = 0x51; 67 drff->report->field[0]->value[1] = 0x00; 68 drff->report->field[0]->value[2] = weak; 69 drff->report->field[0]->value[4] = strong; 70 usbhid_submit_report(hid, drff->report, USB_DIR_OUT); 71 72 drff->report->field[0]->value[0] = 0xfa; 73 drff->report->field[0]->value[1] = 0xfe; 74 } else { 75 drff->report->field[0]->value[0] = 0xf3; 76 drff->report->field[0]->value[1] = 0x00; 77 } 78 79 drff->report->field[0]->value[2] = 0x00; 80 drff->report->field[0]->value[4] = 0x00; 81 dbg_hid("running with 0x%02x 0x%02x", strong, weak); 82 usbhid_submit_report(hid, drff->report, USB_DIR_OUT); 83 84 return 0; 85} 86 87static int drff_init(struct hid_device *hid) 88{ 89 struct drff_device *drff; 90 struct hid_report *report; 91 struct hid_input *hidinput = list_first_entry(&hid->inputs, 92 struct hid_input, list); 93 struct list_head *report_list = 94 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 95 struct input_dev *dev = hidinput->input; 96 int error; 97 98 if (list_empty(report_list)) { 99 dev_err(&hid->dev, "no output reports found\n"); 100 return -ENODEV; 101 } 102 103 report = list_first_entry(report_list, struct hid_report, list); 104 if (report->maxfield < 1) { 105 dev_err(&hid->dev, "no fields in the report\n"); 106 return -ENODEV; 107 } 108 109 if (report->field[0]->report_count < 7) { 110 dev_err(&hid->dev, "not enough values in the field\n"); 111 return -ENODEV; 112 } 113 114 drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL); 115 if (!drff) 116 return -ENOMEM; 117 118 set_bit(FF_RUMBLE, dev->ffbit); 119 120 error = input_ff_create_memless(dev, drff, drff_play); 121 if (error) { 122 kfree(drff); 123 return error; 124 } 125 126 drff->report = report; 127 drff->report->field[0]->value[0] = 0xf3; 128 drff->report->field[0]->value[1] = 0x00; 129 drff->report->field[0]->value[2] = 0x00; 130 drff->report->field[0]->value[3] = 0x00; 131 drff->report->field[0]->value[4] = 0x00; 132 drff->report->field[0]->value[5] = 0x00; 133 drff->report->field[0]->value[6] = 0x00; 134 usbhid_submit_report(hid, drff->report, USB_DIR_OUT); 135 136 dev_info(&hid->dev, "Force Feedback for DragonRise Inc. game " 137 "controllers by Richard Walmsley <richwalm@gmail.com>\n"); 138 139 return 0; 140} 141#else 142static inline int drff_init(struct hid_device *hid) 143{ 144 return 0; 145} 146#endif 147 148static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id) 149{ 150 int ret; 151 152 dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe..."); 153 154 ret = hid_parse(hdev); 155 if (ret) { 156 dev_err(&hdev->dev, "parse failed\n"); 157 goto err; 158 } 159 160 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 161 if (ret) { 162 dev_err(&hdev->dev, "hw start failed\n"); 163 goto err; 164 } 165 166 drff_init(hdev); 167 168 return 0; 169err: 170 return ret; 171} 172 173static const struct hid_device_id dr_devices[] = { 174 { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006), }, 175 { } 176}; 177MODULE_DEVICE_TABLE(hid, dr_devices); 178 179static struct hid_driver dr_driver = { 180 .name = "dragonrise", 181 .id_table = dr_devices, 182 .probe = dr_probe, 183}; 184 185static int __init dr_init(void) 186{ 187 return hid_register_driver(&dr_driver); 188} 189 190static void __exit dr_exit(void) 191{ 192 hid_unregister_driver(&dr_driver); 193} 194 195module_init(dr_init); 196module_exit(dr_exit); 197MODULE_LICENSE("GPL"); 198