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#include "usbhid/usbhid.h" 37 38struct axff_device { 39 struct hid_report *report; 40}; 41 42static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 43{ 44 struct hid_device *hid = input_get_drvdata(dev); 45 struct axff_device *axff = data; 46 int left, right; 47 48 left = effect->u.rumble.strong_magnitude; 49 right = effect->u.rumble.weak_magnitude; 50 51 dbg_hid("called with 0x%04x 0x%04x", left, right); 52 53 left = left * 0xff / 0xffff; 54 right = right * 0xff / 0xffff; 55 56 axff->report->field[0]->value[0] = left; 57 axff->report->field[1]->value[0] = right; 58 axff->report->field[2]->value[0] = left; 59 axff->report->field[3]->value[0] = right; 60 dbg_hid("running with 0x%02x 0x%02x", left, right); 61 usbhid_submit_report(hid, axff->report, USB_DIR_OUT); 62 63 return 0; 64} 65 66static int axff_init(struct hid_device *hid) 67{ 68 struct axff_device *axff; 69 struct hid_report *report; 70 struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list); 71 struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list; 72 struct input_dev *dev = hidinput->input; 73 int error; 74 75 if (list_empty(report_list)) { 76 dev_err(&hid->dev, "no output reports found\n"); 77 return -ENODEV; 78 } 79 80 report = list_first_entry(report_list, struct hid_report, list); 81 82 if (report->maxfield < 4) { 83 dev_err(&hid->dev, "no fields in the report: %d\n", report->maxfield); 84 return -ENODEV; 85 } 86 87 axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL); 88 if (!axff) 89 return -ENOMEM; 90 91 set_bit(FF_RUMBLE, dev->ffbit); 92 93 error = input_ff_create_memless(dev, axff, axff_play); 94 if (error) 95 goto err_free_mem; 96 97 axff->report = report; 98 axff->report->field[0]->value[0] = 0x00; 99 axff->report->field[1]->value[0] = 0x00; 100 axff->report->field[2]->value[0] = 0x00; 101 axff->report->field[3]->value[0] = 0x00; 102 usbhid_submit_report(hid, axff->report, USB_DIR_OUT); 103 104 dev_info(&hid->dev, "Force Feedback for ACRUX game controllers by Sergei Kolzun<x0r@dv-life.ru>\n"); 105 106 return 0; 107 108err_free_mem: 109 kfree(axff); 110 return error; 111} 112 113static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) 114{ 115 int error; 116 117 dev_dbg(&hdev->dev, "ACRUX HID hardware probe..."); 118 119 error = hid_parse(hdev); 120 if (error) { 121 dev_err(&hdev->dev, "parse failed\n"); 122 return error; 123 } 124 125 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 126 if (error) { 127 dev_err(&hdev->dev, "hw start failed\n"); 128 return error; 129 } 130 131 error = axff_init(hdev); 132 if (error) { 133 /* 134 * Do not fail device initialization completely as device 135 * may still be partially operable, just warn. 136 */ 137 dev_warn(&hdev->dev, 138 "Failed to enable force feedback support, error: %d\n", 139 error); 140 } 141 142 return 0; 143} 144 145static const struct hid_device_id ax_devices[] = { 146 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, 147 { } 148}; 149MODULE_DEVICE_TABLE(hid, ax_devices); 150 151static struct hid_driver ax_driver = { 152 .name = "acrux", 153 .id_table = ax_devices, 154 .probe = ax_probe, 155}; 156 157static int __init ax_init(void) 158{ 159 return hid_register_driver(&ax_driver); 160} 161 162static void __exit ax_exit(void) 163{ 164 hid_unregister_driver(&ax_driver); 165} 166 167module_init(ax_init); 168module_exit(ax_exit); 169 170MODULE_AUTHOR("Sergei Kolzun"); 171MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers"); 172MODULE_LICENSE("GPL"); 173