drivers/hid/hid-axff.c

   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 module_hid_driver(ax_driver);
 196
 197 MODULE_AUTHOR("Sergei Kolzun");
 198 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
 199 MODULE_LICENSE("GPL");