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/hid.h> 33 #include <linux/module.h> 34 35 #include "hid-ids.h" 36 37 #ifdef CONFIG_HID_ACRUX_FF 38 39 struct axff_device { 40 struct hid_report *report; 41 }; 42 43 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 44 { 45 struct hid_device *hid = input_get_drvdata(dev); 46 struct axff_device *axff = data; 47 struct hid_report *report = axff->report; 48 int field_count = 0; 49 int left, right; 50 int i, j; 51 52 left = effect->u.rumble.strong_magnitude; 53 right = effect->u.rumble.weak_magnitude; 54 55 dbg_hid("called with 0x%04x 0x%04x", left, right); 56 57 left = left * 0xff / 0xffff; 58 right = right * 0xff / 0xffff; 59 60 for (i = 0; i < report->maxfield; i++) { 61 for (j = 0; j < report->field[i]->report_count; j++) { 62 report->field[i]->value[j] = 63 field_count % 2 ? right : left; 64 field_count++; 65 } 66 } 67 68 dbg_hid("running with 0x%02x 0x%02x", left, right); 69 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT); 70 71 return 0; 72 } 73 74 static int axff_init(struct hid_device *hid) 75 { 76 struct axff_device *axff; 77 struct hid_report *report; 78 struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list); 79 struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list; 80 struct input_dev *dev = hidinput->input; 81 int field_count = 0; 82 int i, j; 83 int error; 84 85 if (list_empty(report_list)) { 86 hid_err(hid, "no output reports found\n"); 87 return -ENODEV; 88 } 89 90 report = list_first_entry(report_list, struct hid_report, list); 91 for (i = 0; i < report->maxfield; i++) { 92 for (j = 0; j < report->field[i]->report_count; j++) { 93 report->field[i]->value[j] = 0x00; 94 field_count++; 95 } 96 } 97 98 if (field_count < 4) { 99 hid_err(hid, "not enough fields in the report: %d\n", 100 field_count); 101 return -ENODEV; 102 } 103 104 axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL); 105 if (!axff) 106 return -ENOMEM; 107 108 set_bit(FF_RUMBLE, dev->ffbit); 109 110 error = input_ff_create_memless(dev, axff, axff_play); 111 if (error) 112 goto err_free_mem; 113 114 axff->report = report; 115 hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT); 116 117 hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n"); 118 119 return 0; 120 121 err_free_mem: 122 kfree(axff); 123 return error; 124 } 125 #else 126 static inline int axff_init(struct hid_device *hid) 127 { 128 return 0; 129 } 130 #endif 131 132 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id) 133 { 134 int error; 135 136 dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n"); 137 138 error = hid_parse(hdev); 139 if (error) { 140 hid_err(hdev, "parse failed\n"); 141 return error; 142 } 143 144 error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 145 if (error) { 146 hid_err(hdev, "hw start failed\n"); 147 return error; 148 } 149 150 error = axff_init(hdev); 151 if (error) { 152 /* 153 * Do not fail device initialization completely as device 154 * may still be partially operable, just warn. 155 */ 156 hid_warn(hdev, 157 "Failed to enable force feedback support, error: %d\n", 158 error); 159 } 160 161 /* 162 * We need to start polling device right away, otherwise 163 * it will go into a coma. 164 */ 165 error = hid_hw_open(hdev); 166 if (error) { 167 dev_err(&hdev->dev, "hw open failed\n"); 168 hid_hw_stop(hdev); 169 return error; 170 } 171 172 return 0; 173 } 174 175 static void ax_remove(struct hid_device *hdev) 176 { 177 hid_hw_close(hdev); 178 hid_hw_stop(hdev); 179 } 180 181 static const struct hid_device_id ax_devices[] = { 182 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), }, 183 { } 184 }; 185 MODULE_DEVICE_TABLE(hid, ax_devices); 186 187 static struct hid_driver ax_driver = { 188 .name = "acrux", 189 .id_table = ax_devices, 190 .probe = ax_probe, 191 .remove = ax_remove, 192 }; 193 module_hid_driver(ax_driver); 194 195 MODULE_AUTHOR("Sergei Kolzun"); 196 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers"); 197 MODULE_LICENSE("GPL"); 198