1 /* 2 * Force feedback support for ACRUX game controllers 3 * 4 * From what I have gathered, these devices are mass produced in China 5 * by several vendors. They often share the same design as the original 6 * Xbox 360 controller. 7 * 8 * 1a34:0802 "ACRUX USB GAMEPAD 8116" 9 * - tested with an EXEQ EQ-PCU-02090 game controller. 10 * 11 * Copyright (c) 2010 Sergei Kolzun <x0r@dv-life.ru> 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_HID_ACRUX_FF 38 #include "usbhid/usbhid.h" 39 40 struct axff_device { 41 struct hid_report *report; 42 }; 43 44 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 45 { 46 struct hid_device *hid = input_get_drvdata(dev); 47 struct axff_device *axff = data; 48 struct hid_report *report = axff->report; 49 int field_count = 0; 50 int left, right; 51 int i, j; 52 53 left = effect->u.rumble.strong_magnitude; 54 right = effect->u.rumble.weak_magnitude; 55 56 dbg_hid("called with 0x%04x 0x%04x", left, right); 57 58 left = left * 0xff / 0xffff; 59 right = right * 0xff / 0xffff; 60 61 for (i = 0; i < report->maxfield; i++) { 62 for (j = 0; j < report->field[i]->report_count; j++) { 63 report->field[i]->value[j] = 64 field_count % 2 ? right : left; 65 field_count++; 66 } 67 } 68 69 dbg_hid("running with 0x%02x 0x%02x", left, right); 70 usbhid_submit_report(hid, axff->report, USB_DIR_OUT); 71 72 return 0; 73 } 74 75 static int axff_init(struct hid_device *hid) 76 { 77 struct axff_device *axff; 78 struct hid_report *report; 79 struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list); 80 struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list; 81 struct input_dev *dev = hidinput->input; 82 int field_count = 0; 83 int i, j; 84 int error; 85 86 if (list_empty(report_list)) { 87 hid_err(hid, "no output reports found\n"); 88 return -ENODEV; 89 } 90 91 report = list_first_entry(report_list, struct hid_report, list); 92 for (i = 0; i < report->maxfield; i++) { 93 for (j = 0; j < report->field[i]->report_count; j++) { 94 report->field[i]->value[j] = 0x00; 95 field_count++; 96 } 97 } 98 99 if (field_count < 4) { 100 hid_err(hid, "not enough fields in the report: %d\n", 101 field_count); 102 return -ENODEV; 103 } 104 105 axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL); 106 if (!axff) 107 return -ENOMEM; 108 109 set_bit(FF_RUMBLE, dev->ffbit); 110 111 error = input_ff_create_memless(dev, axff, axff_play); 112 if (error) 113 goto err_free_mem; 114 115 axff->report = report; 116 usbhid_submit_report(hid, axff->report, USB_DIR_OUT); 117 118 hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n"); 119 120 return 0; 121 122 err_free_mem: 123 kfree(axff); 124 return error; 125 } 126 #else 127 static inline int axff_init(struct hid_device *hid) 128 { 129 return 0; 130 } 131 #endif 132 133 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) 134 { 135 int error; 136 137 dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n"); 138 139 error = hid_parse(hdev); 140 if (error) { 141 hid_err(hdev, "parse failed\n"); 142 return error; 143 } 144 145 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 146 if (error) { 147 hid_err(hdev, "hw start failed\n"); 148 return error; 149 } 150 151 error = axff_init(hdev); 152 if (error) { 153 /* 154 * Do not fail device initialization completely as device 155 * may still be partially operable, just warn. 156 */ 157 hid_warn(hdev, 158 "Failed to enable force feedback support, error: %d\n", 159 error); 160 } 161 162 /* 163 * We need to start polling device right away, otherwise 164 * it will go into a coma. 165 */ 166 error = hid_hw_open(hdev); 167 if (error) { 168 dev_err(&hdev->dev, "hw open failed\n"); 169 hid_hw_stop(hdev); 170 return error; 171 } 172 173 return 0; 174 } 175 176 static void ax_remove(struct hid_device *hdev) 177 { 178 hid_hw_close(hdev); 179 hid_hw_stop(hdev); 180 } 181 182 static const struct hid_device_id ax_devices[] = { 183 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, 184 { } 185 }; 186 MODULE_DEVICE_TABLE(hid, ax_devices); 187 188 static struct hid_driver ax_driver = { 189 .name = "acrux", 190 .id_table = ax_devices, 191 .probe = ax_probe, 192 .remove = ax_remove, 193 }; 194 195 static int __init ax_init(void) 196 { 197 return hid_register_driver(&ax_driver); 198 } 199 200 static void __exit ax_exit(void) 201 { 202 hid_unregister_driver(&ax_driver); 203 } 204 205 module_init(ax_init); 206 module_exit(ax_exit); 207 208 MODULE_AUTHOR("Sergei Kolzun"); 209 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers"); 210 MODULE_LICENSE("GPL"); 211