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/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;
  79         struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
  80         struct input_dev *dev;
  81         int field_count = 0;
  82         int i, j;
  83         int error;
  84
  85         if (list_empty(&hid->inputs)) {
  86                 hid_err(hid, "no inputs found\n");
  87                 return -ENODEV;
  88         }
  89         hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
  90         dev = hidinput->input;
  91
  92         if (list_empty(report_list)) {
  93                 hid_err(hid, "no output reports found\n");
  94                 return -ENODEV;
  95         }
  96
  97         report = list_first_entry(report_list, struct hid_report, list);
  98         for (i = 0; i < report->maxfield; i++) {
  99                 for (j = 0; j < report->field[i]->report_count; j++) {
 100                         report->field[i]->value[j] = 0x00;
 101                         field_count++;
 102                 }
 103         }
 104
 105         if (field_count < 4 && hid->product != 0xf705) {
 106                 hid_err(hid, "not enough fields in the report: %d\n",
 107                         field_count);
 108                 return -ENODEV;
 109         }
 110
 111         axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL);
 112         if (!axff)
 113                 return -ENOMEM;
 114
 115         set_bit(FF_RUMBLE, dev->ffbit);
 116
 117         error = input_ff_create_memless(dev, axff, axff_play);
 118         if (error)
 119                 goto err_free_mem;
 120
 121         axff->report = report;
 122         hid_hw_request(hid, axff->report, HID_REQ_SET_REPORT);
 123
 124         hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n");
 125
 126         return 0;
 127
 128 err_free_mem:
 129         kfree(axff);
 130         return error;
 131 }
 132 #else
 133 static inline int axff_init(struct hid_device *hid)
 134 {
 135         return 0;
 136 }
 137 #endif
 138
 139 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id)
 140 {
 141         int error;
 142
 143         dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n");
 144
 145         error = hid_parse(hdev);
 146         if (error) {
 147                 hid_err(hdev, "parse failed\n");
 148                 return error;
 149         }
 150
 151         error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 152         if (error) {
 153                 hid_err(hdev, "hw start failed\n");
 154                 return error;
 155         }
 156
 157         error = axff_init(hdev);
 158         if (error) {
 159                 /*
 160                  * Do not fail device initialization completely as device
 161                  * may still be partially operable, just warn.
 162                  */
 163                 hid_warn(hdev,
 164                          "Failed to enable force feedback support, error: %d\n",
 165                          error);
 166         }
 167
 168         /*
 169          * We need to start polling device right away, otherwise
 170          * it will go into a coma.
 171          */
 172         error = hid_hw_open(hdev);
 173         if (error) {
 174                 dev_err(&hdev->dev, "hw open failed\n");
 175                 hid_hw_stop(hdev);
 176                 return error;
 177         }
 178
 179         return 0;
 180 }
 181
 182 static void ax_remove(struct hid_device *hdev)
 183 {
 184         hid_hw_close(hdev);
 185         hid_hw_stop(hdev);
 186 }
 187
 188 static const struct hid_device_id ax_devices[] = {
 189         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), },
 190         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0xf705), },
 191         { }
 192 };
 193 MODULE_DEVICE_TABLE(hid, ax_devices);
 194
 195 static struct hid_driver ax_driver = {
 196         .name           = "acrux",
 197         .id_table       = ax_devices,
 198         .probe          = ax_probe,
 199         .remove         = ax_remove,
 200 };
 201 module_hid_driver(ax_driver);
 202
 203 MODULE_AUTHOR("Sergei Kolzun");
 204 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
 205 MODULE_LICENSE("GPL");