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