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 #include <linux/module.h> 35 36 #include "hid-ids.h" 37 38 #ifdef CONFIG_HID_ACRUX_FF 39 #include "usbhid/usbhid.h" 40 41 struct axff_device { 42 struct hid_report *report; 43 }; 44 45 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 46 { 47 struct hid_device *hid = input_get_drvdata(dev); 48 struct axff_device *axff = data; 49 struct hid_report *report = axff->report; 50 int field_count = 0; 51 int left, right; 52 int i, j; 53 54 left = effect->u.rumble.strong_magnitude; 55 right = effect->u.rumble.weak_magnitude; 56 57 dbg_hid("called with 0x%04x 0x%04x", left, right); 58 59 left = left * 0xff / 0xffff; 60 right = right * 0xff / 0xffff; 61 62 for (i = 0; i < report->maxfield; i++) { 63 for (j = 0; j < report->field[i]->report_count; j++) { 64 report->field[i]->value[j] = 65 field_count % 2 ? right : left; 66 field_count++; 67 } 68 } 69 70 dbg_hid("running with 0x%02x 0x%02x", left, right); 71 usbhid_submit_report(hid, axff->report, USB_DIR_OUT); 72 73 return 0; 74 } 75 76 static int axff_init(struct hid_device *hid) 77 { 78 struct axff_device *axff; 79 struct hid_report *report; 80 struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list); 81 struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list; 82 struct input_dev *dev = hidinput->input; 83 int field_count = 0; 84 int i, j; 85 int error; 86 87 if (list_empty(report_list)) { 88 hid_err(hid, "no output reports found\n"); 89 return -ENODEV; 90 } 91 92 report = list_first_entry(report_list, struct hid_report, list); 93 for (i = 0; i < report->maxfield; i++) { 94 for (j = 0; j < report->field[i]->report_count; j++) { 95 report->field[i]->value[j] = 0x00; 96 field_count++; 97 } 98 } 99 100 if (field_count < 4) { 101 hid_err(hid, "not enough fields in the report: %d\n", 102 field_count); 103 return -ENODEV; 104 } 105 106 axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL); 107 if (!axff) 108 return -ENOMEM; 109 110 set_bit(FF_RUMBLE, dev->ffbit); 111 112 error = input_ff_create_memless(dev, axff, axff_play); 113 if (error) 114 goto err_free_mem; 115 116 axff->report = report; 117 usbhid_submit_report(hid, axff->report, USB_DIR_OUT); 118 119 hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n"); 120 121 return 0; 122 123 err_free_mem: 124 kfree(axff); 125 return error; 126 } 127 #else 128 static inline int axff_init(struct hid_device *hid) 129 { 130 return 0; 131 } 132 #endif 133 134 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) 135 { 136 int error; 137 138 dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n"); 139 140 error = hid_parse(hdev); 141 if (error) { 142 hid_err(hdev, "parse failed\n"); 143 return error; 144 } 145 146 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 147 if (error) { 148 hid_err(hdev, "hw start failed\n"); 149 return error; 150 } 151 152 error = axff_init(hdev); 153 if (error) { 154 /* 155 * Do not fail device initialization completely as device 156 * may still be partially operable, just warn. 157 */ 158 hid_warn(hdev, 159 "Failed to enable force feedback support, error: %d\n", 160 error); 161 } 162 163 /* 164 * We need to start polling device right away, otherwise 165 * it will go into a coma. 166 */ 167 error = hid_hw_open(hdev); 168 if (error) { 169 dev_err(&hdev->dev, "hw open failed\n"); 170 hid_hw_stop(hdev); 171 return error; 172 } 173 174 return 0; 175 } 176 177 static void ax_remove(struct hid_device *hdev) 178 { 179 hid_hw_close(hdev); 180 hid_hw_stop(hdev); 181 } 182 183 static const struct hid_device_id ax_devices[] = { 184 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, 185 { } 186 }; 187 MODULE_DEVICE_TABLE(hid, ax_devices); 188 189 static struct hid_driver ax_driver = { 190 .name = "acrux", 191 .id_table = ax_devices, 192 .probe = ax_probe, 193 .remove = ax_remove, 194 }; 195 196 static int __init ax_init(void) 197 { 198 return hid_register_driver(&ax_driver); 199 } 200 201 static void __exit ax_exit(void) 202 { 203 hid_unregister_driver(&ax_driver); 204 } 205 206 module_init(ax_init); 207 module_exit(ax_exit); 208 209 MODULE_AUTHOR("Sergei Kolzun"); 210 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers"); 211 MODULE_LICENSE("GPL"); 212